From vincent at visualtrans.de  Tue Jan  6 16:52:59 2004
From: vincent at visualtrans.de (vincent wehren)
Date: Tue, 6 Jan 2004 22:52:59 +0100
Subject: Finaly found a simple enough task for python, took the plunge,
	but.....
References: <3FFB5312.1030803@connection.com>
Message-ID: <btfao2$i19$1@news2.tilbu1.nb.home.nl>


"Sam" <Sambo at connection.com> schrieb im Newsbeitrag
news:3FFB5312.1030803 at connection.com...
| Only 2 weeks messing around with it ( thanks to programs like SYNCHRONEX
and
| BITORRENT ), and already trying to create windows ( the paths are just too
long
| for me to want to type them ).
| After much trial and error I finaly got the following code to open the
'get dir'
| dialog , but I am getting another blank window titled 'tk' and "NOT
RESPONDING"
| When I kill it (end task), I get reiniit/restart (CTRL+F6) in my shell
window
| What am I doing wrong? Do I need to do anythink to clean up after using
the
| dialogs?

Take a look at the tkFileDialog module. Or better, use it for convenience.
It already provides some "standard" dialogs. You code would then look
similar to:
#-----------------------
import Tkinter
import tkFileDialog

def me():
    root = Tkinter.Tk()
    root.withdraw() # do this to remove the "blank screen" you mention
    dirname = tkFileDialog.askdirectory()
    return dirname

print me()
#------------------------

HTH

Vincent Wehren






|
|
****************************************************************************
******
| import os
| import sys
| import tkCommonDialog
|
| def me():
|    dir_name = ""
|
|    getfileDLG = tkCommonDialog.Dialog()
|    getfileDLG.command = "tk_chooseDirectory"
|    getfileDLG.__init__()
|    dir_name = getfileDLG.show( )
|
|    print dir_name
|
|
****************************************************************************
******
|
| The other think is that the dialog does not get focus.
|
| Must admit I was little more confortable with the HTML help in Python 2.3
| however less informative ( which I only installed a week before 2.3.3)
| The help server in 2.3.3 just produces blank pages (most of the time) and
| eventualy locks up. I think it has to do with the loopback, I read about
| somewhere, but I can't be dialed to my ISP all the time.
|
|
| Thanks, Sam.
|




From none at none.com  Mon Jan 12 17:35:58 2004
From: none at none.com (Derek)
Date: Mon, 12 Jan 2004 17:35:58 -0500
Subject: Why learn Python ??
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<btubno$bd8k6$1@ID-46268.news.uni-berlin.de>
	<100655fo84c2211@corp.supernews.com>
Message-ID: <btv7gf$btv1p$1@ID-46268.news.uni-berlin.de>

"Cameron Laird" in message:
> I contest the proposition that "Python is less than stellar
> at large applications ...", and, in particular, that C++ is
> super- ior there.  I recognize you're not alone in that;
> for me, though, large-scale programming is one of Python's
> *strengths*.
>
> I don't have a good decision mechanism to propose.  Trial by
> ordeal (and most large-team projects fit in that category)
> seems as apt as any.

All I know is that there are thousands of extremely large projects
written in C++, some consisting of millions of lines of code written
by hundreds of developers.  C++, while far from perfect, has proven
its worth on a huge scale.  Python, at the very least, has yet to do
so.





From graham__fawcett at hotmail.com  Wed Jan 14 00:17:28 2004
From: graham__fawcett at hotmail.com (Graham Fawcett)
Date: 13 Jan 2004 21:17:28 -0800
Subject: what is best for web development??
References: <f046efac.0401100358.5aa812a0@posting.google.com>
	<87wu80559x.fsf@blakie.riol>
	<f046efac.0401120330.5c2e7c50@posting.google.com>
	<87oet9grqy.fsf@blakie.riol>
	<e9570f37.0401121052.ed79710@posting.google.com>
	<bu1buf$smq$1@nunki.unm.edu>
Message-ID: <e9570f37.0401132117.1a4fe539@posting.google.com>

Jason Mobarak <jmob at unm.edu> wrote in message news:<bu1buf$smq$1 at nunki.unm.edu>...
> Graham Fawcett wrote:
> > I wouldn't jump at using Twisted's app framework (Woven?) on top of
> > Twisted's Web server, though. No disrespect intended to the Twisted
> > community or their great body of work; it's just that server and
> > app-framework are two separate concerns: one day you might want to or
> > need to switch Web servers, and you need to know that your framework
> > is portable. I'm no Twisted expert: perhaps Woven is indeed portable,
> > and a kindly Twisted person will elaborate here.
> 
> You can use Woven with mod_proxy and Apache. Same with Woven's 
> successor: Nevow, http://divmod.org/users/slyphon.twistd/nevow/moin.cgi/  .

Thanks for clarifying this, Jason. I hereby retract my anti-Twisted statement!  ;-)

-- G


From bart_nessux at hotmail.com  Fri Jan 23 14:49:17 2004
From: bart_nessux at hotmail.com (Bart Nessux)
Date: Fri, 23 Jan 2004 14:49:17 -0500
Subject: when x process isn't running... do something
In-Reply-To: <burtha$5ck$1@solaris.cc.vt.edu>
References: <burtha$5ck$1@solaris.cc.vt.edu>
Message-ID: <burtrt$5gm$1@solaris.cc.vt.edu>

Bart Nessux wrote:
> Howdy,
> 
> I'm trying to time how long it takes dd to run on a G5, versus how long 
> it takes to run on a G4 (PATA vs. SATA). Both sytems have Mac OS X 
> 10.3.2 and Python 2.3. Could someone demonstrate how I might use Python 
> to monitor for the presense of a process and to do something (in this 
> case send an email which I know how to do) as soon as that process is no 
> longer present? Any suggestions on how to monitor? Call top every 5 secs 
> and read it's output searching for 'dd'???
> 
> TIA,
> Bart
> 

I forgot to mention the fact that I already know when the process began. 
All I need to know is when it ends and then I can calculate the part in 
between those two points.



From skip at pobox.com  Fri Jan 23 17:27:57 2004
From: skip at pobox.com (Skip Montanaro)
Date: Fri, 23 Jan 2004 16:27:57 -0600
Subject: Various strings to dates.
In-Reply-To: <PRgQb.16209$AA6.9881@fed1read03>
References: <4GfQb.16187$AA6.14368@fed1read03>
	<MFgQb.95539$6y6.1915432@bgtnsc05-news.ops.worldnet.att.net>
	<PRgQb.16209$AA6.9881@fed1read03>
Message-ID: <16401.40941.538046.350775@montanaro.dyndns.org>


    Amy> The following three date strings is another example of the various
    Amy> date formats I will encounter here.

    Amy> Thursday, 22 January 2004 03:15:06
    Amy> Thursday, January 22, 2004, 03:15:06
    Amy> 2004, Thursday, 22 January 03:15:06

Assuming you won't have any ambiguous dates (like 1/3/04), just define
regular expressions which label the various fields of interest, then match
your string against them until you get a hit.  For
example, the first would be matched by this:

    >>> import re
    >>> pat = re.compile(r'(?P<wkday>[A-Z][a-z]+),\s+(?P<day>[0-9]{1,2})\s+'
    ...      r'(?P<month>[A-Z][a-z]+)\s+(?P<year>[0-9]{4,4})')
    >>> mat = pat.match('Thursday, 22 January 2004 03:15:06')
    >>> mat
    <_sre.SRE_Match object at 0x487498>
    >>> mat.groups()
    ('Thursday', '22', 'January', '2004')
    >>> mat.group('month')
    'January'

etc.  (Extending the regexp to accommodate the time is left as an exercise.)
Once you have a match, pull out the relevant bits, maybe tweak them a bit
(int()-ify things), then create a datetime instance from the result.

I do something like this in my dates module.  It's old and ugly though:

    http://manatee.mojam.com/~skip/python/

Search for "date-parsing module".  This was written long before the datetime
module was available and was used for for a slightly different purpose.  It
recognizes a number of different date range formats in addition to
individual dates.  You might be able to snag some regular expression ideas
from it though.

Skip



From kjdyck at hotmail.com  Thu Jan 15 08:35:44 2004
From: kjdyck at hotmail.com (Ken Dyck)
Date: Thu, 15 Jan 2004 08:35:44 -0500
Subject: Portable filename comparison
Message-ID: <QGwNb.46$Ja2.924@nnrp1.uunet.ca>

Is there a way with Python 2.2 to portably test the equivalence of two
filenames?

The os.path.samefile function seems to do what I want, but it is only
available on Unix and Mac. I need something that works on Windows.

The os.path.normcase and os.path.normpath functions are available on all
platforms, but don't quite get me there. For example, on Windows

>>> os.path.normcase(os.path.normpath("C:\Program Files"))
'c:\\program files'
>>> os.path.normcase(os.path.normpath("C:\PROGRA~1"))
'c:\\progra~1'

I suppose I could find a way to call into the Win32 API directly, but I'd
prefer to use a portable solution if I can find one.

Any suggestions?

Ken




From sombDELETE at pobox.ru  Sat Jan 24 11:30:39 2004
From: sombDELETE at pobox.ru (Serge Orlov)
Date: Sat, 24 Jan 2004 19:30:39 +0300
Subject: Perl vs. Python for text manipulation
References: <69A0D4AB81C51447AD6BA387782B8D64093D8A@midl-mail4.etcconnect.com>
	<028FD9F0-4E01-11D8-BB78-0003934ACDEC@zdome.net>
	<mailman.720.1074906442.12720.python-list@python.org>
	<1013o27e3nb141@corp.supernews.com>
	<ouhdyloduy.fsf@andlx-anamika.cisco.com> <871xpp1i8r.fsf@pobox.com>
	<ou4qulnwy0.fsf@andlx-anamika.cisco.com>
Message-ID: <buu6j5$12lf$1@nadya.doma>


"Ganesan R" <rganesan at myrealbox.com> wrote in message news:ou4qulnwy0.fsf at andlx-anamika.cisco.com...
> >>>>> "John" == John J Lee <jjl at pobox.com> writes:
>
> > Ganesan R <rganesan at myrealbox.com> writes:
> >> > Is that all that people mean, though, when they talk about Perl's
> >> > superiority for text mangling?  Is there more to it?  --
> > [...]
> >> The perl "built-in" idioms for text processing is not only a syntactic
> >> convenience, there are real performance advantages. For example a simple
> >> perl loop like
> >>
> >> while (<>) { }
> >>
> >> is nearly 6 times slower in python (8 time slower with Python 2.2) using
> > [...]
>
> > Did you try 'for line in file:'?  ISTR Tim Peters optimized that (or
> > was that fileinput?), precisely because of every hacker and their dog
> > running this as a benchmark.
>
> fileinput is not optimized yet, at least I don't remember any mails about
> fileinput in python-devel since python 2.3 was released.  I know that it is
> slow. for line in file: does seem to be optimized though. The last time I
> ran the tests python was definitely twice as slow (which was before python
> 2.3 was officially released); now it appears to be only about 40% slower. I
> need to revisit these crude benchmarks.

Since this problem is not IO bound but rather python internals bound,
it makes sense to try psyco.




From mksql at yahoo.com  Thu Jan  8 15:08:56 2004
From: mksql at yahoo.com (mksql at yahoo.com)
Date: Thu, 08 Jan 2004 15:08:56 -0500
Subject: Tkinter button command curiousity
Message-ID: <srdrvv47qvrrb6r26bkuh925phb1lpqkno@4ax.com>

New to Tkinter. Initially, I had some code that was executing button commands at
creation, rather than waiting for user action. Some research here gave me a
solution, but I am not sure why the extra step is necessary.

This causes the "graph" function to execute when the button is created:
	Button(root, text='OK', command=graph(canvas)))

However, this waits until the button is pressed (the desired behavior):
	def doit():
	     graph(canvas)
	Button(root, text='OK', command=doit))


Functionally, what is the difference? Why do I need to create a function, to
call a function, simply to make a button command wait until pressed? Is there a
better method?



From arjen.dijkstraNoSpam at hccnet.nl  Mon Jan 19 09:24:11 2004
From: arjen.dijkstraNoSpam at hccnet.nl (duikboot)
Date: Mon, 19 Jan 2004 15:24:11 +0100
Subject: Tkinter
References: <mailman.501.1074519339.12720.python-list@python.org>
Message-ID: <400be89b$0$127$e4fe514c@dreader13.news.xs4all.nl>

http://www.pythonware.com/library/tkinter/introduction/

regards,
Arjen

"km" <km at mrna.tn.nic.in> schreef in bericht
news:mailman.501.1074519339.12720.python-list at python.org...
> Hi all,
>
> Is there any good online tutorial which is a good intro for Tkinter
programming in Python ?
>
> regards,
> KM
>
>
>




From jikosan83 at yahoo.com  Sun Jan 11 01:01:58 2004
From: jikosan83 at yahoo.com (Jikosan)
Date: 10 Jan 2004 22:01:58 -0800
Subject: Help with if statement
Message-ID: <d91f466b.0401102201.3709771@posting.google.com>

I can't get my "if" statement to work indicated below.
What happens is no matter what the value random is, neg gets incremented by 1.

This is actually my first time programming in Python. Any help is appreciated.

TIA
Gene

import random
uniform = random.uniform
neg = 0
N = int(raw_input("Enter number of random generations, N: "))

for x in range(0,N):
    random = uniform(-1, 1)
    print random
    if random < 1.0: <--- Not working
        neg = neg+1
print neg
pi = 4.*(neg/N)
print 'The value of Pi is ', pi


From g.marshall at nospam.com  Mon Jan 26 03:43:42 2004
From: g.marshall at nospam.com (George Marshall)
Date: Mon, 26 Jan 2004 08:43:42 GMT
Subject: Class returning None ?
Message-ID: <2r4Rb.286342$e6.11127748@twister2.libero.it>

Hi, I'm wondering, what's the best way to check for
success or failure on object initialization ?

This is my ugly workaround to do that :

class mytest:
	status=0
	def __init__ (self):
		status=1
	
_mytest =  mytest()

def mytest ():
     if everythingok():
         return _mytest()
     else:
         return None

def everythingok():
	return False

def main():
	a=mytest()
	if a==None:
		return 1

if __name__ == "__main__"
	main()


What's the python way to do that ?

Thanks.



From herrn at gmx.net  Fri Jan  9 13:13:43 2004
From: herrn at gmx.net (Marco Herrn)
Date: 9 Jan 2004 18:13:43 GMT
Subject: error with /usr/lib/python2.3/compileall.py: "Sorry invalid mode: U"
Message-ID: <btmr0n$8b7tv$1@ID-165840.news.uni-berlin.de>

Hi,

I tried to install a package under debian, where in the postinstall
phase some python scripts are called. Then I got the error
"Sorry invalid mode: U".
I looked what this script does and it is the following:

	python -O /usr/lib/python2.3/compileall.py /usr/share/woody

I looked where exactly in compileall.py the error occurs and it is here:

                try:
                    print fullname
                    print None
                    print dfile
                    print True
                    ok = py_compile.compile(fullname, None, dfile, True)
                except KeyboardInterrupt:
                    raise KeyboardInterrupt
                except py_compile.PyCompileError,err:
                    print err.msg
                    success = 0
                except IOError, e:
                    print "Sorry", e
                    success = 0

So it obviously runs into the IOError. Then I altered the script to see
what parameters are given to the method py_compile.compile. Here is one
example of it:

	fullname: /usr/share/woody/woody_xml.py
		  None
	dfile:	  None
		  1

I looked after the permissions on the file
/usr/share/woody/woody_xml.py, it is:

	-rw-r--r--    1 root     root

Now I don't have any idea why there is an IOError. Ist it because dfile
is None? What is dfile for? Where can here be the error?

Bye
Marco



-- 
Marco Herrn             herrn at gmx.net
(GnuPG/PGP-signed and crypted mail preferred)
Key ID: 0x94620736



From igor.NOSPAM at obda.net  Thu Jan 29 07:04:44 2004
From: igor.NOSPAM at obda.net (Igor Fedorow)
Date: Thu, 29 Jan 2004 13:04:44 +0100
Subject: Python & XML & DTD (warning: noob attack!)
Message-ID: <pan.2004.01.29.13.04.44.213048.2804@obda.net>

Hello all,

I have an XML file with an internal DTD which looks roughly like this:

	<?xml version="1.0"?>
	<!DOCTYPE root [
	  <!ELEMENT  root         (node)*>
	  <!ELEMENT  node         (description, info, node*)>
	  <!ELEMENT  description  (#PCDATA)>
	  <!ELEMENT  info         EMPTY>
	  <!ATTLIST  info
	    text     CDATA        #REQUIRED
	  >
	]>
	<root>
	  <node>
	    <description>node 1</description>	
	    <info text="info 1" />
	    <node>
	      <description>node 1-1</description>
	      <info text="info 1-1" />
	    </node>
	  </node>
	  <node>
	    <description>node 2</description>
	    <info text="info 2" />
	    <node>
	      <description>node 2-1</description>
	      <info text="info 2-1" />
	    </node>
	    <node>
	      <description>node 2-2</description>
	      <info text="info 2-2" />
	    </node>
	  </node>
	</root>

I want to parse this file into my application, modify the data (this includes
maybe creating and/or deleting nodes), and write it back into the file --
including the DTD. (It doesn't necessarily need validation, though.)

I tried xml.dom.ext.PrettyPrint, but it produces only

	<?xml version='1.0' encoding='UTF-8'?>
	<!DOCTYPE root>
	<root>
	   ...
	</root>

actually lacking the document type definition.

Any help is appreciated!

Thanks in advance & cheers =)
*igor*


From aahz at pythoncraft.com  Wed Jan 28 11:57:59 2004
From: aahz at pythoncraft.com (Aahz)
Date: 28 Jan 2004 11:57:59 -0500
Subject: Cross-version extension modules?
References: <mailman.902.1075286564.12720.python-list@python.org>
Message-ID: <bv8pmn$e0d$1@panix1.panix.com>

In article <mailman.902.1075286564.12720.python-list at python.org>,
Peter Astrand  <peter at cendio.se> wrote:
>
>Thanks. Is PYTHON_API_VERSION guaranteed to increase only when the
>Python major or minor version increases, or can it change between micro
>versions as well?

Depends whether the micro-version is a pure bugfix release.  So far,
we've been hewing closely to PEP 6, so no, it won't change.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

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


From john.abel at pa.press.net  Wed Jan 21 05:39:42 2004
From: john.abel at pa.press.net (John Abel)
Date: Wed, 21 Jan 2004 10:39:42 +0000
Subject: personal document mgmt system idea
In-Reply-To: <b03e80d.0401210236.f9dcf01@posting.google.com>
References: <b03e80d.0401200538.10fcf33a@posting.google.com>	<bujmjn$rkn$05$1@news.t-online.com>
	<b03e80d.0401210236.f9dcf01@posting.google.com>
Message-ID: <400E56EE.6080700@pa.press.net>

Have you looked at the modules available from divmod.org for your text 
searching?

Sandy Norton wrote:

>Stephan Diehl wrote:
>
>[...]
>
>  
>
>>Just dump your files somewhere in the filesystem and keep a record of it in
>>your database.
>>    
>>
>
>I think I will go with this approach. (see other posting for details)
>
>
>  
>
>>In addition, a real (text) search engine might be of help. I'm using swish-e
>>(www.swish-e.org) and are very pleased with it.
>>    
>>
>
>Just downloaded it... looks good. Now if it also had a python api (-;
>
>  
>
>>Maybe, before you invest to much time into such a project, you should check
>>out the following:
>>
>>Chandler (http://www.osafoundation.org)
>>        if it's finished, it will do excactly what you are aiming for (and 
>>        it's written in Python)
>>    
>>
>
>Still early stages... I see they dropped the ZODB.
>
>  
>
>>ReiseFS (see www.namesys.com -> Future Vision)
>>Gnome Storage (http://www.gnome.org/~seth/storage)
>>WinFS
>>(http://msdn.microsoft.com/Longhorn/understanding/pillars/WinFS/default.aspx)
>>    
>>
>
>
>Wow! Very exciting stuff... I guess we'll just have to wait and see what develops.
>
>
>  
>
>>Hope that helps
>>    
>>
>
>Yes. Very informative. Cheers for the help.
>
>  
>
>>Stephan
>>    
>>
>
>Sandy
>  
>



From fwang2 at yahoo.com  Sat Jan 31 16:10:33 2004
From: fwang2 at yahoo.com (oliver)
Date: 31 Jan 2004 13:10:33 -0800
Subject: pythonwin woes
References: <a7c2c93c.0401301309.4e61c606@posting.google.com>
	<bveron$1h6n$1@arachne.labyrinth.net.au>
Message-ID: <a7c2c93c.0401311310.663fde8@posting.google.com>

Thanks for your reply, Mark.

Yes, I can imagine scenarios where keeping the state around, the way
pythonwin is doing is useful. On the other hand, I think there is also
a need to restart python  process to get a clean start. Maybe an
option for both is warranted.

oliver

> IDLE runs all programs in a new, external Python process, so never sees 
> this issue.  In lots of ways, I like the way Pythonwin does it - keeping 
> that state around can be very useful - eg, after the program has 
> terminated, you can still see the objects etc.


From jhodges at mit.edu  Mon Jan 26 18:30:55 2004
From: jhodges at mit.edu (Jonathan Hodges)
Date: 26 Jan 2004 23:30:55 GMT
Subject: termios POSIX implementation
Message-ID: <4015a32f$0$577$b45e6eb0@senator-bedfellow.mit.edu>

Posted with an Unregistered Version of NewsHunter - The Newsgroup Utility for OS X.
Get your copy today at: http://www.parkersoftware.com/products/newshunter/

Can anyone provide details on how the python implementation of termios.h differs from the POSIX library?  Are there platform specific issues, especially for the Darwin build?  It seems that if I make identical function calls in a python script and in some c code, the result on my COM port is very different.

Is there something reasonable to explain this?  I tried to decipher the source implementation of TERMIOS.py, but I can't seem to make heads or tails of it.

Any help would be greater appreciated.

Thanks,
JH


From jmob at nospam__unm.edu  Fri Jan 16 05:11:41 2004
From: jmob at nospam__unm.edu (Jason Mobarak)
Date: Fri, 16 Jan 2004 03:11:41 -0700
Subject: keeping Python code properly indented
In-Reply-To: <3064b51d.0401151125.711ade4c@posting.google.com>
References: <3064b51d.0401151125.711ade4c@posting.google.com>
Message-ID: <HtadnQr3p7JLJZrdRVn-hw@comcast.com>

The tabnanny module/program is a very good way to make sure python files 
are properly indented.

@ares shtoom --> python -c "import tabnanny; tabnanny.check('.')"
./ui/base.py 9 '\tfrom shtoom import prefs \n'
./test/test_stun.py 18 "\tn1 = NetAddress('10/8')\n"
./audio/__init__.py 21 '\taudio = attempt()\n'
./multicast/unixspec.py 24 '\tgroup = gethostbyname(addr)\n'
./multicast/SAP.py 8 '\tself.dismantlePacket(pack)\n'
./multicast/SDP.py 35 "\tlines = text.split('\\n')\n"
./multicast/netnum.py 10 '\tl = l+[0]*(4-len(l))\n'
./rtp.py 128 '\treturn d\n'


beliavsky at aol.com wrote:
> How do you keep Python code properly indented as you modify it? I use
> an Emacs-type editor that has a Python mode, so the initial indenting
> is easy. If I later want to put a 'for' loop (or an 'if' statement)
> around a bunch of code, I find myself going through the body of the
> loop, manually re-indenting to keep the nested loops correct. There
> should be a better way.
> 
> I think that having a 'for' loop end with a matching 'next' statement,
> as done in (for example) Basic, is a safer and clearer way of writing
> loops, although some Python programmers consider this a 'feature'
> rather than a 'bug'.

-- 
(------------------------------(
  )~~~~~ Jason A. Mobarak ~~~~~~~)
(~~ aether_at_gentoo_dot_org ~~(
  )~~~~ jmob_at_unm_dot_edu ~~~~~)
(------------------------------(


From sombDELETE at pobox.ru  Tue Jan 13 02:45:06 2004
From: sombDELETE at pobox.ru (Serge Orlov)
Date: Tue, 13 Jan 2004 10:45:06 +0300
Subject: Problem with what raw_input() returns
References: <56f42e53.0401121746.39b9e4db@posting.google.com>
Message-ID: <bu07lv$170h$1@nadya.doma>


"sebb" <sebb at linuxcult.com> wrote in message news:56f42e53.0401121746.39b9e4db at posting.google.com...
> If I do the following script:
>
> # -*- coding: cp1252 -*-
> one = "??"
> two = one.replace("?","a")
>
> print two # it prints aa as I expected

It's not a good idea anyway, unless you know what you're doing.
Use unicode.

>
> But with the following script:
>
> # -*- coding: cp1252 -*-
> one = raw_input() # When I run the script, I type ??
> two = one.replace("?","a")
>
> print two # it still prints ?? and I want it to print aa
>
>
> Can someone help me with that problem?
> Thanks

Use at least 2.3 Python. Then encode stdin like that:
import sys, codecs
sys.stdin = codecs.getreader(sys.stdout.encoding)(sys.stdin)
one = raw_input()
two = one.replace(u"?","a")

The code above assumes that Python was able to figure out
console encoding. If it's absent (sys.stdout.encoding == None)
you have to find it out yourself. Besides if it's absent you
need to encode stdout using codecs.getwriter as well.

-- Serge.




From jseale18 at insightbb.com  Thu Jan 22 22:14:18 2004
From: jseale18 at insightbb.com (Jeff Seale)
Date: Fri, 23 Jan 2004 03:14:18 GMT
Subject: Tkinter color names/codes
References: <Xns94759F3BCD0B7jseale18insightbbcom@204.127.199.17>
	<pan.2004.01.19.21.06.17.957950@phreaker.net>
Message-ID: <Xns9478E236A5D3Fjseale18insightbbcom@204.127.204.17>

Nuff Said <nuffsaid at phreaker.net> wrote in
news:pan.2004.01.19.21.06.17.957950 at phreaker.net: 

> On Mon, 19 Jan 2004 20:39:18 +0000, Jeff Seale wrote:
> 
>> I just happend to notice that there are very FEW colors that you have
>> to generate using #hex codes. But I was wondering, how many colors
>> have names assigned to them in Tkinter and what are their #hex
>> translations? It'd be nice to know these so I don't accidentally
>> create a color that already has a name.
> 
> http://wiki.tcl.tk/8606
>     - list with all named colors in Tcl/Tk
> 
> http://wiki.tcl.tk/colors
>     - W3C names, hex codes and Tcl/Tk names for the 
>       16 HTML 3.2 colors (i.e. the basic VGA set)
> 
> HTH / Nuff
> 

Is it possible to translate all those colors into their #hex combinations? 
The ones I know about already are Red #FF0000, Yellow #FFFF00, Green #
00FF00, Cyan #00FFFF, Blue #0000FF, Magenta #FF00FF, White #FFFFFF and 
Black #000000.


From Chuck at spears.com  Wed Jan 28 11:45:59 2004
From: Chuck at spears.com (Chuck Spears)
Date: Wed, 28 Jan 2004 11:45:59 -0500
Subject: id3v2 module
References: <pan.2004.01.13.09.12.39.813880@beeznest.NOSPAM.net>
Message-ID: <jopf10lkbr6ftrf1qtijjn7j1h9hs6l3rq@4ax.com>

I too was looking for an ID3V2 tag reader/writer for python but I
never did have much luck.  Most of the projects are dead in the water.
I dropped it for now but will get around at some point to writing it.


From tim.golden at viacom-outdoor.co.uk  Tue Jan 20 03:56:38 2004
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Tue, 20 Jan 2004 08:56:38 -0000
Subject: interface to win job scheduler portable from win98 .. winXP /
	cmdline or COM ?
Message-ID: <F1921F85572CB04D9F55B14BDC76B3E4434621@tdi_nt9.internal.viacom-outdoor.co.uk>

>-----Original Message-----
>From: Robert [mailto:k.robert at gmx.de]
>
>I found the os.popen("AT /?") way ....
>however it works not on Win98 and the "Day" you enter at the 
>AT are language
>dependent.  (e.g. Mi(ttwoch) in german, We(dnesday) in english Windows
>versions)
>
>I need a solution work from Win98..WinXP most independent from
>internationalization etc.
>
>is there portable way - or at all a way to manipulate the 
>Win98/ME scheduler
>?
>if no simple means, even COM stuff would be ok.
>any pointers?
>

WMI looks like it covers it, but only NT4 / Win2K / XP.
Oh, sorry, I've just realised: the Win32_ScheduledJob 
actually refers to the AT service (despite the name!)

If you're really looking for something which will work
across every version of Windows, I think you're better
off doing something entirely Python from the start. It
shouldn't be hard (he says, having not tried it himself). 
The advantage is: it will work everywhere and you have 
complete control over it. The disadvantage is: you have 
to create your own interface and deal with whatever 
issues the existing mechanisms have already dealt with.

TJG


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From mike at triplepc.com  Sat Jan 10 12:58:02 2004
From: mike at triplepc.com (Michael T. Babcock)
Date: Sat, 10 Jan 2004 12:58:02 -0500
Subject: need help translating a PHP for statement to python
In-Reply-To: <E1AfFXM-0007bV-72@mail.python.org>
References: <E1AfFXM-0007bV-72@mail.python.org>
Message-ID: <40003D2A.70806@triplepc.com>

>
>
>If someone could explain to me how one should
>translate the multiple increment, evaluations, etc. in the first line
>I would appreciate it deeply ...
>
>for ($y = 0, $x = $cx-$cy-1; $y <= $cy; ++$y,++$x) {
>    $prd = $q * $y_ar[$y] + $car;
>    $prd -= ($car = intval($prd / 1E7)) * 1E7;
>    if ($bar = (($x_ar[$x] -= $prd + $bar) < 0)) $x_ar[$x] += 1E7;
>    }
>
>  
>

In all likelihood, you could rewrite the algorithm (if you understand 
it) in Python in a more Pythonesque kind of way and make it easier to 
maintain in the future, but this should do it:

y = 0
x = cx - cy - 1
while y <= cy:
    prd = q * y_ar[y] + car
    # { and so on }
    x += 1
    y += 1

... that should do it for you, should it not?
-- 
Michael T. Babcock
http://www.fibrespeed.net/~mbabcock/code



From tweedgeezer at hotmail.com  Tue Jan 27 23:00:13 2004
From: tweedgeezer at hotmail.com (Jeremy Fincher)
Date: 27 Jan 2004 20:00:13 -0800
Subject: I support PEP 326
References: <mailman.654.1074788734.12720.python-list@python.org>
	<698f09f8.0401271318.21c9ca72@posting.google.com>
	<bv6ph8$181$1@news.service.uci.edu>
Message-ID: <698f09f8.0401272000.79704ef0@posting.google.com>

Josiah Carlson <jcarlson at nospam.uci.edu> wrote in message news:<bv6ph8$181$1 at news.service.uci.edu>...
> Unfortunately, I have a feeling that the PEP may be killed because there 
> doesn't seem to be a location/name that is agreeable to those with 
> voting power in python-dev.

I simply can't understand this aversion to sticking useful things in
the builtin namespace.  Especially when marginally useful things like
reversed (a trivially written 3-line generator) have been put there.

Jeremy


From mwh at python.net  Tue Jan 13 11:17:58 2004
From: mwh at python.net (Michael Hudson)
Date: Tue, 13 Jan 2004 16:17:58 GMT
Subject: Division oddity
References: <ssn3009029rrug3l8dk1pn06tqd019ucld@4ax.com>
	<7xeku5vrn8.fsf@ruckus.brouhaha.com>
	<cdm7005r12o3o3f6gngj8no1qh74ul3733@4ax.com>
	<400413E0.5C691A56@engcorp.com>
Message-ID: <m3hdyzyg96.fsf@pc150.maths.bris.ac.uk>

Peter Hansen <peter at engcorp.com> writes:

> Tim Rowe wrote:
> > 
> > Well, the documentation for "input()" says "Equivalent to
> > eval(raw_input(/prompt/))". Perhaps it should say "/Usually/
> > equivalent...."
> 
> I remember reading that too, and just assumed that at this point
> it was in fact *implemented* that way, as a simple alias.  Maybe
> it should be...

http://www.python.org/sf/876178

Ideas on how to write a testcase welcome.

Cheers,
mwh

-- 
  People think I'm a nice guy, and the fact is that I'm a scheming,
  conniving bastard who doesn't care for any hurt feelings or lost
  hours of work if it just results in what I consider to be a better
  system.                                            -- Linus Torvalds


From Kyler at news.Lairds.org  Mon Jan 19 18:12:07 2004
From: Kyler at news.Lairds.org (Kyler Laird)
Date: Mon, 19 Jan 2004 23:12:07 GMT
Subject: Python-based file synchronizer (like Unison)?
Message-ID: <ua2ud1-evk.ln1@jowls.lairds.org>

I've been using Unison
	http://www.cis.upenn.edu/~bcpierce/unison/
for awhile and it causes me a lot of grief.  I'd love to have a
Python version which would be vastly easier to modify.

Anyone know of anything like this?  It doesn't seem like it
should take a lot to sit on top of rsync and resolve conflicts.

I see that someone implemented rsync in Python and that there's
a SWIG wrapper for librsync.
	http://minkirri.apana.org.au/~abo/projects/pysync/README
I might have to take a whack at this on my own, but I'd prefer
to use something better that someone has already crafted.

Thank you.

--kyler


From bkelley at wi.mit.edu  Sun Jan 11 11:15:01 2004
From: bkelley at wi.mit.edu (Brian Kelley)
Date: Sun, 11 Jan 2004 16:15:01 GMT
Subject: Python And Internationalization maybe a pre-pep?
In-Reply-To: <40011315.7070000@v.loewis.de>
References: <3ffede43$0$563$b45e6eb0@senator-bedfellow.mit.edu>
	<3FFF36A1.40303@v.loewis.de> <YSKLb.10550$5V2.17781@attbi_s53>
	<40011315.7070000@v.loewis.de>
Message-ID: <8EeMb.24302$5V2.36981@attbi_s53>

Martin v. L?wis wrote:
> Brian Kelley wrote:
> 
>> I don't see too much difference between using
>> _("STRING")
>>
>> to indicate a string to be internationalized and
>> i"STRING"
>>
>> Except that the later will be automatically noticed at compile time, 
>> not run-time.
> 
> 
> I'm not really sure what "compile time" is in Python. If it is the time
> when the .pyc files are generated: What happens if the user using the
> pyc files has a language different from the language of the
> administrator creating the files?
> 
> Or, what precisely does it mean that it is "noticed"?
> 
> 
>>> Using what textual domain?
>>>
>> I am using the same mechanism as gettext but tying it into the "import 
>> locale" mechanism.
> 
> 
> That does not answer my question? How precisely do you define the
> textual domain?
> 
> In gettext, I typically put a function at the beginning of each module
> 
> def _(msg):
>   return gettext.dgettext("grep", msg)
> 
> thus defining the textual domain as "grep". In your syntax, I see no
> place to define the textual domain.
> 
>> I think this happens fine in both cases.  The mechanism for 
>> internationalizing with wxPython just didn't feel, well, pythonic.  It 
>> felt kind of tacked into place.  Of course I feel the same way about 
>> most C macros :)
> 
> 
> Can you be more specific? Do you dislike function calls?
> 
>> Perhaps I am optimizing the wrong end of the stick.  
> 
> 
> Why is this an optimization in the first place? Do you make anything run
> faster? If so, what and how?
> 
>> Compile-time generation just feels safer to me.  The code-analyzer 
>> might miss special cases and what not, but if it is generated at 
>> compile time it will work all the time.
> 
> 
> Please again elaborate: What is compile-time, and what is generation,
> in this context?

I'll back away for a second to try to explain my previous rationale. 
Now that it appears to have changed that is.

By compile-time I meant essentially, not-run time.  For instance if you 
had a function

def foo(...):
     return i"Message"

You wouldn't have to execute foo directly for the parse tree to notice 
that i"Message" was a string that is supposed to be internationalized. 
This process gets this string placed in the internationalization table 
which I would then use various tools to modify and translate.

The international string class would then has an internal mechanism to 
notice what the locale is and what the value of the string should be 
when printed or used.  This is transparent to dictionaries and the like, 
so all the developer has to do is use

i"Message"

This should tranparent to Gui Widgets and the like so you can place 
i"Message" in a list box, it will automatically get internationalized 
but when you get the result of the user selected, it still can be used 
to dictionary look ups exactly the same as the original i"Message".

> The gettext module provides the GNUTranslation object. You can have
> multiple such objects, and need to explicitly use the language's
> object on gettext() invocation, e.g.
> 
>   print current_language.gettext("This is good")

This is the mechanism that I was originally using for the internation 
string class.

> If you can be certain that users will be subsequent, you can do
> 
> def _(msg):
>    return current_language.gettext(msg)
> 
> print _("This is good")

My version of this is
message = i"This is good"
print message

> There might be other ways to determine the current context, e.g.
> by looking at thread state. In that case, you still can use
> the _ function, but implement it in looking at the thread state.

I'll take a look at this.

An example of how I am currently using this is as follows:

message = i"This is good"
or
message = international("This is good")

lookup = {}
print message # -> "This is good"
lookup[message] = func

locale.set_locale("es") # spanish, this is from memory, might be wrong
print message # -> "Esto es bueno"
assert lookup[message] == func

local.set_locale("it") # italian
print message # -> "Ci? ? buona"
assert lookup[message] == func

My current thinking is as follows, I could get most of this effect by 
not having a new string type (i"") and just making an 
internationalization string type.  Then I would just use code analyzer 
tools to generate the translation tables as Serge suggested, heck, they 
could even use the parse module if I was so inclined.

In either case, I far prefer using internation("This is good") over the 
_("This is good") function call.  Mainly because it is more explicit and 
using _ overrides the interpreters built in for getting last result.

 >>> 2+2
4
 >>> _
4

Thanks for your inspection of this rambling.
Brian



From arsanalytica at yahoo.com  Thu Jan 22 16:15:20 2004
From: arsanalytica at yahoo.com (Dan)
Date: 22 Jan 2004 13:15:20 -0800
Subject: Python Consultants?
Message-ID: <8e198b65.0401221315.6d5cb3fe@posting.google.com>

I am working on a python/zope web application and could really use
some *expert* help on a short term basis.

Is there an appropriate forum for trolling for Python Consultants?

Here are a pair XML problems that are available:

#1) Setup to convert these xml files 
http://www.gothamanalytics.com/PairTools/geturl?url=http://app.quotemedia.com/data/getHistory.xml&symbol=SUNW
http://www.gothamanalytics.com/PairTools/geturl/?url=http://app.quotemedia.com/data/getQuotes.xml?symbols=SUNW
into a vector of open,close,volume information suitable for use with a
numerical Python module.  Doing this quickly is a plus.
Here are the dtds of interest:
http://app.quotemedia.com/data/dtds/history.dtd
http://app.quotemedia.com/data/dtds/quotes.dtd
 
#2) Expose the Salesforce.com SOAP functionality from salesforce.com
generated WSDL files, here is an example WSDL
http://gothamanalytics.com/Ex/enterprise.wsdl
See sforce.com for more info on the salesforce.com API.  A Python
solution is preferred but a work around which uses Java and the
Salesform.com Apache Axis library and an appropriate gateway from
python might also be acceptable.  Results from an attempt at using ZSI
to process the WSDL file is appended to this message.


From reply.in.the.newsgroup at my.address.is.invalid  Sat Jan  3 12:02:56 2004
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Sat, 03 Jan 2004 18:02:56 +0100
Subject: Pass a variable to another python script
References: <3ff6ef44$1@clarion.carno.net.au>
Message-ID: <r5tdvvob0cn0irldmhu1spqsfubf5j1m5f@4ax.com>

Steve:
>I've written a small cgi python script that collects feedback from a 
>webform. I need to pass the values to another python script.. how do I 
>do this? 

There are many ways (command line, socket, file, database, ...), but the
easiest solution is as parameter of a function in the other module.

In module a:

    feedback = "good site"
    import b
    b.function(feedback)

-- 
Ren? Pijlman


From alisonken1 at juno.com  Fri Jan  9 22:24:00 2004
From: alisonken1 at juno.com (Ken Roberts)
Date: 9 Jan 2004 19:24:00 -0800
Subject: UPC/EAN barcode script
Message-ID: <c26362ae.0401091924.45e23cfe@posting.google.com>

Here's a quick routine that I hacked out to verify UPC-A/E and EAN-13/8 barcodes.

Anyone have any suggestions how to improve it?

================== Test script ==============
import ean

# Below codes taken from http://www.barcodeisland.com examples
# UPC-E codes to expand/verify
e = { 0: '01278907',
      1: '01278916',
      2: '01278925',
      3: '01238935',
      4: '01248934',
      5: '01258933',
      6: '01268932',
      7: '01278931',
      8: '01288930',
      9: '01298939',
      10: '01291944',
      11: '01291155',
      12: '01291162',
      13: '01291179',
      14: '01291186' }

# UPC-A codes to verify/compress
a = { 0: '012000007897',
      1: '012100007896',
      2: '012200007895',
      3: '012300000895',
      4: '012400000894',
      5: '012500000893',
      6: '012600000892',
      7: '012700000891',
      8: '012800000890',
      9: '012900000899',
      10: '012910000094',
      11: '012911000055',
      12: '012911000062',
      13: '012911000079',
      14: '012911000086' }

print 'checking upca2e ...'
for i in a.keys():
      t1=a[i]
      t2=ean.upca2e(t1)
      print 'key ', i, ':', t1, ean.upcaValid(t1)
      print 'upce', i, ':', t2, ean.upceValid(t2)

print
print 'Checking upce2a ...'
for i in e.keys():
      t1=e[i]
      print 'key', i, ':', t1, ean.upceValid(t1)

================ Barcode script ==============

"""
ean.py
See http://www.barcodeisland.com for UPC/EAN specs

Routines for verifying UPC/EAN codes and generating check digit

UPC-A is actually EAN13 code with a "0" prepended to it. The Barcode
Association has designated that all programs should be converted to
EAN by Jan 01, 2005.

Routines for UPC-A/UPC-E barcodes.

UPC is basically EAN13 with an extra leading '0' to bring the length
to 13 characters.

Check digit is calculated using ean13CheckDigit('0'+UPCA).

UPC-A is 12 characters in length with [12] being the check digit.
UPC-E is a compressed (convoluted algorithm) UPC-A with extraneous
middle 0 digits removed.

"""

__version__ = "$Revision: 0.4$"

codeLength = { "EAN13": 13,
               "EAN8": 8,
               "UPCA": 12,
               "UPCE": 8 }

def __lenCheck(chk, _type='EAN13'):
    return (len(chk) == codeLength[_type]) or \
       (len(chk) == codeLength[_type]-1)


def __sumDigits(chk, start=0, end=1, step=2, mult=1):
    return reduce(lambda x, y: int(x)+int(y), list(chk[start:end:step])) * mult

def eanCheckDigit(chk, code='EAN13'):
    """Returns the checksum digit of an EAN-13/8 code"""
    if chk.isdigit() and __lenCheck(chk):
        if code == 'EAN13':
            m0=1
            m1=3
        elif code == 'EAN8':
            m0=3
            m1=1
        else:
            return None

        _len = codeLength[code]-1
        t = 10 - (( __sumDigits(chk, start=0, end=_len, mult=m0) + \
                    __sumDigits(chk, start=1, end=_len, mult=m1) ) %10 ) %10

        if t == 10:
            return 0
        else:
            return t

    return None

def ean13Valid(chk):
    """Verify if code is valid EAN13 barcode.  Returns True|False"""
    return chk.isdigit() and __lenCheck(chk) and \
           (int(chk[-1]) == eanCheckDigit(chk))

def ean8CheckDigit(chk):
    """Returns the checksum digit of an EAN8 code"""
    return eanCheckDigit(chk, code='EAN8')

def ean8Valid(chk):
    """Verify if code is valid EAN8 barcode. Returns True|False"""
    if chk.isdigit() and len(chk) == codeLength["EAN8"]:
        return int(chk[-1]) == ean8CheckDigit(chk)
    return False

# UPC codes below

def upcaCheckDigit(chk):
    if chk is not None:
        return eanCheckDigit('0'+chk)
    return None

def upcaValid(chk):
    if chk is not None:
        return ean13Valid('0'+chk)
    return False

def upca2e(chk):
    t = None
    if chk.isdigit() and __lenCheck(chk, 'UPCA'):
        if '012'.find(chk[3]) >= 0 and chk[4:8] == '0000':
            t=chk[:3]+chk[8:11]+chk[3]
        elif chk[4:9] == '00000':
            t=chk[:4]+chk[9:11]+'3'
        elif chk[5:10] == '00000':
            t = chk[:5]+chk[10]+'4'
        elif '5678'.find(chk[10]) >= 0 and chk[6:10] == '0000':
            t=chk[:6]+chk[10]
        else:
            t=None

        # Check digit
        if t is not None:
            if upcaValid(chk):
                t=t+chk[-1]
            elif len(chk) == codeLength["UPCA"]-1:
                t=t+str(upcaCheckDigit(chk))
            else:
                t=None
    return t

def upce2a(chk):
    t=None
    if chk.isdigit() and __lenCheck(chk, 'UPCE'):
        if '012'.find(chk[6]) >= 0:
            t=chk[:3]+chk[6]+'0000'+chk[3:6]
        elif chk[6] == '3':
            t=chk[:4]+'00000'+chk[4:6]
        elif chk[6] == '4':
            t=chk[:5]+'00000'+chk[5]
        elif '5678'.find(chk[6]) >= 0:
            t=chk[:6]+'0000'+chk[6]
        else:
            t=None

        if t is not None:
            if len(chk) == codeLength["UPCE"] - 1:
                t=t+str(upcaCheckDigit(t))
            elif len(chk) == codeLength['UPCE'] and \
                 int(chk[-1]) == upcaCheckDigit(t):
                t=t+chk[-1]
            else:
                t=None
    return t
    
def upceValid(chk):
    return len(chk) == codeLength["UPCE"] and upcaValid(upce2a(chk))

def upceCheckDigit(chk):
    if chk is not None:
        return upcaCheckDigit(upce2a(chk))
    return None


From bmgx_no_sp at mgleesonprop.co.za  Sun Jan  4 12:07:19 2004
From: bmgx_no_sp at mgleesonprop.co.za (bmgx)
Date: Sun, 04 Jan 2004 19:07:19 +0200
Subject: using cgi form via http and extracting results
Message-ID: <3ff84844.0@news1.mweb.co.za>

I would like to use an already existing online service (currency 
converter) basically consisting of a html form with a few options that 
is submitted and returns the results. I really don't know where to start 
but I have assumed the following steps need to be taken:

1) Make an http connection to the remote script (http://server/script.cgi)

2) Fill out the html form (1x TEXT and 2x SELECT input fields)

3) Submit the form

4) extract the actual returned result. (using regex or something..)

Any help on which modules to use would be much appreciated!



From seanl at chaosring.org  Sat Jan  3 15:48:00 2004
From: seanl at chaosring.org (Sean R. Lynch)
Date: Sat, 03 Jan 2004 12:48:00 -0800
Subject: Creating a capabilities-based restricted execution system
In-Reply-To: <bt788l$1pej$1@nadya.doma>
References: <LmmdnUn4seDeGWuiXTWc-w@speakeasy.net> <bt788l$1pej$1@nadya.doma>
Message-ID: <d7ycncKp5rket2qiXTWc-g@speakeasy.net>

Serge Orlov wrote:
> "Sean R. Lynch" <seanl at chaosring.org> wrote in message news:LmmdnUn4seDeGWuiXTWc-w at speakeasy.net...
> 
>>I've been playing around with Zope's RestrictedPython, and I think I'm
>>on the way to making the modifications necessary to create a
>>capabilities-based restricted execution system. The idea is to strip out
>>any part of RestrictedPython that's not necessary for doing capabilities
>>and do all security using just capabilities.
>>
>>The basic idea behind capabilities is that you don't give any piece of
>>code you don't trust a reference to something you don't want it to have
>>access to. You use proxies instead (E calls them "facets").
> 
> 
> "Don't give" sounds good in theory but fails in practice. You can't prevent
> leakage 100%, so any security system _must_ help programmer to keep
> trusted data away from untrusted code. Do you know that rexec failed
> exactly because it didn't help to prevent leakage?

Hmm, this is good information. I think it will probably change the way 
I've been looking at this.

>>In order to be able to allow untrusted code to create proxy objects, I
>>needed to be able to store a reference to the proxied object in a
>>private attribute.
>>
>>To create private attributes, I'm using "name mangling," where names
>>beginning with X_ within a class definition get changed to
>>_<uuid>_<name>, where the UUID is the same for that class. The UUIDs
>>don't need to be secure because it's not actually possible to create
>>your own name starting with an underscore in RestrictedPython; they just
>>need to be unique across all compiler invocations.
> 
> 
> This is a problem: you declare private attributes whereas you should be
> declaring public attributes and consider all other attributes private. Otherwise
> you don't help prevent leakage. What about doing it this way:
> 
> obj.attr means xgetattr(obj,acc_tuple) where acc_tuple = ('attr',UUID)
> and xgetattr is
> def xgetattr(obj,acc_tuple):
>   if not has_key(obj.__accdict__,acc_tuple):
>     raise AccessException
>   return getattr(obj,acc_tuple[0])
> 
> __accdict__ is populated at the time class or its subclasses are created.
> If an object without __accdict__ is passed to untrusted code it will
> just fail. If new attributes are introduced but not declared in __accdict__
> they are also unreachable by default.

This is very interesting, and you may convince me to use something 
similar, but I don't think you're quite correct in saying that the 
name-mangling scheme declares private attributes; what is the difference 
between saying "not having X_ in front of the attribute makes it public" 
and "having X_ in front of the attribute makes it private?"

>>The nice thing about using this name mangling is that it's only done at
>>compile time and doesn't affect runtime performance. An interesting side
>>effect is that code defined on a class can access private attributes on
>>all descendants of that class, but only ones that are defined by other
>>code on that class, so this isn't a security issue.
>>
>>I was thinking I needed read-only attributes to be able to avoid
>>untrusted code's being able to sabotage the revoke method on a proxy
>>object, but I'm thinking that just keeping around a reference to the
>>revoke method in the original code may be enough.
>>
>>Does anyone think I'm going in completely the wrong direction here? Am I
>>missing anything obvious?
> 
> 
> It depends on what type of security do you want. Did you think about DOS
> and covert channels? If you don't care about that, yeah, you don't miss
> anything obvious. <wink> you should worry whether you miss something
> non-obvious.

I am not (particularly) concerned about DoS because I don't plan to be 
running anonymous code and having to restart the server isn't that big 
of a deal. I do plan to make it hard to accidentally DoS the server, but 
I'm not going to sacrifice a bunch of performance for that purpose. As 
for covert channels, can you give me an example of what to look for?

I am certainly worried about non-obvious things, but my intent wasn't to 
put up a straw man, because if I ask if I'm missing non-obvious things, 
the only possible answer is "of course."

> By the way, did you think about str.encode? Or you are not worried about
> bugs in zlib too?

Well, it'll only take *one* problem of that nature to force me to go 
back to converting all attribute accesses to function calls. On the 
other hand, as long as any problem that allows a user to access 
protected data is actually a in (zlib, etc), I think I'm not going to 
worry about it too much yet. If there is some method somewhere that will 
allow a user access to protected data that is not considered a bug in 
that particular subsystem, then I have to fix it in my scheme, which 
would probably require going back to converting attribute access to 
method calls.


From mcfletch at rogers.com  Mon Jan 19 16:31:28 2004
From: mcfletch at rogers.com (Mike C. Fletcher)
Date: Mon, 19 Jan 2004 16:31:28 -0500
Subject: Simple question from Python newb... What am I doing wrong? For
 x, y,	z in aTuple:
In-Reply-To: <FNXOb.10918$AA6.1283@fed1read03>
References: <FNXOb.10918$AA6.1283@fed1read03>
Message-ID: <400C4CB0.2000606@rogers.com>

Amy G wrote:

>I have a whole bunch of tuples that look something like this,
>  
>
...

>for x, y, z in aTuple:
>    do something with x
>    do something with y
>    do something with z
>
>But I am getting the error that there are too many values to unpack.
>  
>
You have one of two problems, most likely:

    * if you really are doing for x,y,z in aTuple (not a list of
      aTuples), you're trying to unpack *each* item in aTuple (where
      each such item is a string, all of which happen to be much longer
      than three items) into three items.  Python right complains that
      the strings aren't all three characters long.
    * if you really are doing for x,y,z in aTupleList (a list of
      aTuples), you've got one non-standard tuple in the list, and can
      find it pretty easily by doing [ x for x in aTupleList if len(x)
      != 3 ] and then figure out how it got there.

My non-existent money is on the first case.

...

>It prints the items from the tuple each on its own line.  How can I unpack
>these three string values into three different string variables like my
>first for loop?
>  
>
x,y,z = aTuple

Enjoy yourself,
Mike

 
_______________________________________
  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://members.rogers.com/mcfletch/






From guettli at thomas-guettler.de  Mon Jan  5 10:09:42 2004
From: guettli at thomas-guettler.de (Thomas Guettler)
Date: Mon, 05 Jan 2004 16:09:42 +0100
Subject: python and LAN
References: <bt64pg$3mcjk$1@ID-216132.news.uni-berlin.de>
Message-ID: <pan.2004.01.05.15.09.42.540921@thomas-guettler.de>

Am Sat, 03 Jan 2004 20:16:09 +1000 schrieb Egor Bolonev:

> Hello, All!
> 
> I wish to write a programs for LAN, but I don't know where to begin.
> 
> For example I have to get a hostlist of my network:
> ...
> 192.168.1.35  acca
> 192.168.3.38  alligator

What operating system do you use?

Some systems answer ping to the
broadcast address, but not all

ping 255.255.255.255

If you network is not switched, you
can listen to the wire by setting
the ethernet card to promiscuous mode. 
Google for tcpdump.

But this has nothing to do with python.

 thomas



From kirk at strauser.com  Wed Jan 21 23:35:07 2004
From: kirk at strauser.com (Kirk Strauser)
Date: Thu, 22 Jan 2004 04:35:07 GMT
Subject: Secure Voting software
References: <20040121174434.28446.00000428@mb-m15.aol.com>
	<7xvfn4lq9m.fsf@ruckus.brouhaha.com>
Message-ID: <87zncgy544.fsf@strauser.com>

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

At 2004-01-22T01:35:01Z, Paul Rubin <http://phr.cx at NOSPAM.invalid> writes:

> The book "Security Engineering" by Ross Anderson is a good place to start
> reading if you're interested in the subject.

I just finished "Practical Cryptography" by Niels Ferguson and Bruce
Schneier.  It was almost enough to make me not want to bother trying.  :-/
- -- 
Kirk Strauser
The Strauser Group
Open. Solutions. Simple.
http://www.strausergroup.com/
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.4 (GNU/Linux)

iD8DBQFAD1Ke5sRg+Y0CpvERAlquAKCSi28drKEVE3fPC1F9c8SWRBEwWwCdH5pO
3eAxJDSQ3ViaBDmQG7ZWV+w=
=sjqt
-----END PGP SIGNATURE-----


From peter at engcorp.com  Mon Jan 19 14:53:38 2004
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 19 Jan 2004 14:53:38 -0500
Subject: HowTo distinguish between File and Directory
References: <Xns94758BB1DDFADsdfexpertunecom@216.168.3.44>
Message-ID: <400C35C2.2C46EE3C@engcorp.com>

Scott F wrote:
> 
> On Win32, is there a function in the standard modules that can take a
> pathname and return whether it refers to a File or a Directory?

import os
os.path.isfile(name)
os.path.isdir(name)

Is that adequate?

-Peter


From rainerd at eldwood.com  Wed Jan 14 14:47:01 2004
From: rainerd at eldwood.com (Rainer Deyke)
Date: Wed, 14 Jan 2004 19:47:01 GMT
Subject: I come not to bury C++, but to praise it...
References: <mailman.337.1074032524.12720.python-list@python.org>
	<bu1uul$cam92$1@ID-46268.news.uni-berlin.de>
	<cu%Mb.47396$8H.99443@attbi_s03>
	<bu3khe$dbm5v$1@ID-46268.news.uni-berlin.de>
Message-ID: <V0hNb.66211$I06.303702@attbi_s01>

Derek wrote:
> I also use C++ and Python as my main languages and I agree with your
> comments.  However, I don't agree that Python is inherently "safer"
> than C++.  At best I see it as a tie.  For example, C++ let's you
> corrupt memory among other "unsafe" things, most of which can be
> avoided by using standard containers, smart pointers, etc.  Python
> lets you do "unsafe" things such as passing an object to a function
> when it makes no sense to do so, which can lead to nasty runtime
> surprises.

What I meant by "safer" is that the worst thing that usually happens in a
defective Python program is that it terminates with an exception, complete
with traceback.  A defective C++ program can do a lot worse.


-- 
Rainer Deyke - rainerd at eldwood.com - http://eldwood.com




From jjl at pobox.com  Fri Jan 16 14:44:41 2004
From: jjl at pobox.com (John J. Lee)
Date: 16 Jan 2004 19:44:41 +0000
Subject: Python COM Server with C++
References: <a40573e7.0401151408.341bda2a@posting.google.com>
Message-ID: <871xpz7k5y.fsf@pobox.com>

andre.bernemann at gmx.de (Andre Bernemann) writes:

> I have written a Python COM Server with the help of Mark Hammond's
> Book Programming Python on Win32. I used the CreateObjects method in
> VB to access the COM Methods and all worked fine. Unfortunately, that
[...]

Hmm, sorry, I didn't really read the question properly!

If you've started with win32all, you probably want to stick with it.
I'd guess the python-win32 list is more likely to yield answers
(though Mark has been posting here recently, so you might be
lucky...).  Make sure to search the list archive first, of course.


John


From ed_zeng at yahoo.com  Fri Jan 23 18:06:45 2004
From: ed_zeng at yahoo.com (ex laguna)
Date: 23 Jan 2004 15:06:45 -0800
Subject: py2exe with shelve error
Message-ID: <53ab57.0401231506.50938738@posting.google.com>

Hi, I have ran into a problem with py2exe 0.5.0 and shelve in python
2.3.3.  The script works fine standalone, but not with py2exe.

Does anyone have a solution of workaround for this?  Thanks much.

# Begin of setup.py
from distutils.core import setup
import py2exe

setup(console=["test.py"])
# End of setup.py

# Begin of test.py
import shelve

f = shelve.open('test.txt')
f['hello'] = 'world'
f.close()
f = shelve.open('test.txt')
print f.keys()
print f.values()
# End of test.py

c:\Python>python -V
Python 2.3.3

c:\Python>python test.py
['hello']
['world']

c:\Python>python setup.py py2exe
running py2exe
*** searching for required modules ***
*** parsing results ***
creating python loader for extension '_sre'
creating python loader for extension 'datetime'
*** finding dlls needed ***
*** create binaries ***
*** byte compile python files ***
skipping byte-compilation of C:\Program
Files\Python23\lib\__future__.py to __future__.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\copy_reg.py
to copy_reg.pyc
skipping byte-compilation of C:\Program
Files\Python23\lib\sre_compile.py to sre_compile.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\locale.py
to locale.pyc
byte-compiling c:\Python\build\bdist.win32\winexe\temp\_sre.py to
_sre.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\unittest.py
to unittest.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\macpath.py
to macpath.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\popen2.py
to popen2.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\stat.py to
stat.pyc
byte-compiling c:\Python\build\bdist.win32\winexe\temp\datetime.py to
datetime.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\atexit.py
to atexit.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\whichdb.py
to whichdb.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\cmd.py to
cmd.pyc
skipping byte-compilation of C:\Program
Files\Python23\lib\os2emxpath.py to os2emxpath.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\tempfile.py
to tempfile.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\pprint.py
to pprint.pyc
skipping byte-compilation of C:\Program
Files\Python23\lib\_strptime.py to _strptime.pyc
skipping byte-compilation of C:\Program
Files\Python23\lib\sre_constants.py to sre_constants.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\re.py to
re.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\ntpath.py
to ntpath.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\tokenize.py
to tokenize.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\getopt.py
to getopt.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\doctest.py
to doctest.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\random.py
to random.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\string.py
to string.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\warnings.py
to warnings.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\UserDict.py
to UserDict.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\inspect.py
to inspect.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\repr.py to
repr.pyc
skipping byte-compilation of C:\Program
Files\Python23\lib\traceback.py to traceback.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\copy.py to
copy.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\bdb.py to
bdb.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\types.py to
types.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\anydbm.py
to anydbm.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\sre.py to
sre.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\pickle.py
to pickle.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\StringIO.py
to StringIO.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\pdb.py to
pdb.pyc
skipping byte-compilation of C:\Program
Files\Python23\lib\linecache.py to linecache.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\token.py to
token.pyc
skipping byte-compilation of C:\Program
Files\Python23\lib\dummy_thread.py to dummy_thread.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\opcode.py
to opcode.pyc
skipping byte-compilation of C:\Program
Files\Python23\lib\posixpath.py to posixpath.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\calendar.py
to calendar.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\shelve.py
to shelve.pyc
skipping byte-compilation of C:\Program
Files\Python23\lib\sre_parse.py to sre_parse.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\os.py to
os.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\dis.py to
dis.pyc
*** copy extensions ***
*** copy dlls ***
copying C:\Program Files\Python23\Lib\site-packages\py2exe\run.exe ->
c:\Python\dist\test.exe

c:\Python>cd dist

c:\Python\dist>test.exe
Traceback (most recent call last):
  File "test.py", line 3, in ?
  File "shelve.pyc", line 231, in open
  File "shelve.pyc", line 211, in __init__
  File "anydbm.pyc", line 62, in ?
ImportError: no dbm clone found; tried ['dbhash', 'gdbm', 'dbm',
'dumbdbm']
Exception exceptions.AttributeError: "DbfilenameShelf instance has no
attribute 'writeback'" in  ignored


From gandalf at geochemsource.com  Wed Jan  7 05:26:09 2004
From: gandalf at geochemsource.com (Gandalf)
Date: Wed, 07 Jan 2004 11:26:09 +0100
Subject: Newbie: Python equivalent to Delphi TTable
References: <BAY99-F60HTUAYHCb6s0002e876@hotmail.com>
Message-ID: <3FFBDEC1.8010702@geochemsource.com>

Please try the kinterbasdb module.
You can find it here:

http://kinterbasdb.sourceforge.net/

Probably you can find all necessary information there.
What you want is a cursor. However, the TTable component is buffered. 
You can go forward and backward in the dataset.
AFAIK, cursors in DB API 2.0 are unidirectional. Thus, you must make 
your own buffering if you want to be able to go
forward and backward too. Another note: these cursors do not support 
updates but you can write a class easily that suit
your needs.

Best,
 
   Laci 1.0


Ashley Lloyd wrote:

> Hi all,
>
> I don't know how many of you are very familiar with Delphi, but we're 
> looking for anything that offers the user a similar kind of interface 
> to an Interbase table as Delphi components TTable, TIBOTable, etc 
> (findkey, etc). If anyone knows of anything allowing us to do this, 
> I'd be grateful.
>
> Sorry that this no doubt sounds a little vague, I just can't really 
> explain it any better!
>
> TIA
>
> Ashley
>
> _________________________________________________________________
> It's fast, it's easy and it's free. Get MSN Messenger today! 
> http://www.msn.co.uk/messenger
>
>





From aahz at pythoncraft.com  Fri Jan 16 13:07:25 2004
From: aahz at pythoncraft.com (Aahz)
Date: 16 Jan 2004 13:07:25 -0500
Subject: Suggested generator to add to threading module.
References: <7934d084.0401152058.164a240c@posting.google.com>
Message-ID: <bu998t$o62$1@panix1.panix.com>

In article <7934d084.0401152058.164a240c at posting.google.com>,
Andrae Muys <amuys at shortech.com.au> wrote:
>
>Found myself needing serialised access to a shared generator from
>multiple threads.  Came up with the following
>
>def serialise(gen):
>  lock = threading.Lock()
>  while 1:
>    lock.acquire()
>    try:
>      next = gen.next()
>    finally:
>      lock.release()
>    yield next

I'm not sure this is generic enough to go in the standard library.
Usually, I'd recommend that someone wanting this functionality consider
other options in addition to this (such as using Queue.Queue()).
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

A: No.
Q: Is top-posting okay?


From wrbt at email.com  Tue Jan 27 17:43:55 2004
From: wrbt at email.com (Larry)
Date: 27 Jan 2004 14:43:55 -0800
Subject: Color count in PIL
Message-ID: <2ec1bc1c.0401271443.15f56742@posting.google.com>

I've been walking up, down, and around instances in the object model
of PIL trying to figure out how to easily calculate how many unique
colors are used in an image, specifically a bitmap (mode "P"). Am I
missing something?

Thanks python friends!


From fBechmann at web.de  Fri Jan  2 10:32:48 2004
From: fBechmann at web.de (Frank Bechmann)
Date: 2 Jan 2004 07:32:48 -0800
Subject: question: Python or Lua for rejuvenation of old PCs?
References: <mailman.16.1072987285.12720.python-list@python.org>
	<dbc00a99.0401020243.1f89524c@posting.google.com>
	<7xisjupq14.fsf@ruckus.brouhaha.com>
Message-ID: <dbc00a99.0401020732.3b5db15@posting.google.com>

he was writing about a 

>> distributed, fault-tolerant home monitoring and control system that
>> would be easy to port later to embedded microcontrollers

which is not so far from

>> embedded controller tasks

if my english is not too worse.

and whether FORTH is too much of an inconvenience is in the eyes of
the beholder - but I have to admit that your statement is true for the
vast majority of programmers and that I forgot to add a :).


From crap at crud.com  Wed Jan 28 23:37:17 2004
From: crap at crud.com (Moosebumps)
Date: Thu, 29 Jan 2004 04:37:17 GMT
Subject: "static" checking
Message-ID: <160Sb.19106$fo1.10783@newssvr25.news.prodigy.com>

I'm wondering what kind of checking I can do on a python program before
running it (besides reading over every line).  I hate running a long python
script, only to have it fail at the end because I misspelled a function
name, or made some other silly mistake that a compiler would normally catch.
Then I have to run it all over again to see what happened or come up with
some sort of short test.

I usually do try to isolate the new parts of my code, and run them first
with some dummy data that will run fast.  But that is not always possible
because of dependencies, and it would be nice to have some sort of sanity
check up front.

I noticed there is a "check" function in IDLE, and I've tried running it but
it never does anything.  Maybe it is not catching the kinds of errors that
are biting me.

thanks,
MB




From mesteve_b at hotmail.com  Sat Jan  3 18:33:36 2004
From: mesteve_b at hotmail.com (python newbie)
Date: Sat, 03 Jan 2004 23:33:36 GMT
Subject: Lists are weird when they are instance members
References: <ffHJb.5475$HL3.4277@newssvr29.news.prodigy.com>
	<VfIJb.5485$kp4.731@newssvr29.news.prodigy.com>
Message-ID: <kjIJb.5486$mm4.511@newssvr29.news.prodigy.com>

I didn't say that right.  I meant to say that I now finally understood
what's going on now, with your replies, but I will take a slight break from
the app I'm writing, and do some ingesting of the core Python concepts.

"python newbie" <mesteve_b at hotmail.com> wrote in message
news:VfIJb.5485$kp4.731 at newssvr29.news.prodigy.com...
> thanks for the helpful replies.
>  I guess I was just in confusion as to why I was able to leave alone the
> string variables in class FileGroup, such
> as sourceDir and destinDir, and nothing unpredictable happened with those,
> but with the list variable, I had to treat differently.
>  But after I again read closely, Python In a Nutshell, I'm sure I will
> understand.
>




From simonb at NOTTHISBIT.webone.com.au  Sat Jan 31 17:11:15 2004
From: simonb at NOTTHISBIT.webone.com.au (Simon Burton)
Date: Sun, 01 Feb 2004 09:11:15 +1100
Subject: numarray and NumarrayType
References: <bvgiof$jpp$1@graf.cs.uni-magdeburg.de>
Message-ID: <pan.2004.01.31.22.11.13.579627@NOTTHISBIT.webone.com.au>

On Sat, 31 Jan 2004 16:48:30 +0100, Marco Bubke wrote:

> Hi
> 
> I have a little problem mit numarrays type. I want to get the Type but its
> noch the right one. If I array.typecode() I get the right one but there is
> not a typecode for all types. I geht the same type fer float and double?
> 
> Thats wrong. Its a bug by me or numarray?
> 

I don't know but I used NA_nameToTypeNo on theArray.type().name

Seems to work OK.

Simon.




From tim.golden at viacom-outdoor.co.uk  Fri Jan 30 03:49:14 2004
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Fri, 30 Jan 2004 08:49:14 -0000
Subject: Pythonwin - breaking out of infinite loop
Message-ID: <F1921F85572CB04D9F55B14BDC76B3E44346A0@tdi_nt9.internal.viacom-outdoor.co.uk>

>From: Graham [mailto:gsmith at oxfam.org.uk]
>How do I stop a Python program running in PythinWin?  I would 
>expect to be
>able to use CTR-C or CTRL-break etc.
>

Find the Python icon in the systray (next to the clock at the
bottom right of the screen). Right-click and select
"Break into running code" (or something like that)

TJG


________________________________________________________________________
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From peterwu at hotmail.com  Wed Jan 21 16:25:59 2004
From: peterwu at hotmail.com (Peter Wu)
Date: Wed, 21 Jan 2004 16:25:59 -0500
Subject: python mode question
References: <87y8s1oxuj.fsf@tulip.whu.ca>
	<mailman.608.1074717298.12720.python-list@python.org>
Message-ID: <87u12pouxk.fsf@tulip.whu.ca>

James Henderson <james at logicalprogression.net> writes:

> On Wednesday 21 January 2004 8:23 pm, Peter Wu wrote:
>> After firing C-c C-c to execute a python program in Python mode, an
>> output buffer will be displayed at the bottom of the window. Also, the
>> focus remains in the output buffer. How can I switch the focus from the
>> output buffer to the editing buffer? Thanks!
>
> C-x o

That's it! Thanks!

> I take it you're talking about Emacs. :)

Yeah, GNU Emacs. ^_^

-- 
       ,,,
      (o o)       Peter Wu
---ooO-(_)-Ooo--- Powered by GNU/Linux 2.4.22


From jason at tishler.net  Tue Jan 27 10:04:09 2004
From: jason at tishler.net (Jason Tishler)
Date: Tue, 27 Jan 2004 10:04:09 -0500
Subject: Error under Cygwin - threading module
In-Reply-To: <20040127144636.GA1204@tishler.net>
References: <b840abf4.0401221419.343cb5e1@posting.google.com>
	<20040127144636.GA1204@tishler.net>
Message-ID: <20040127150408.GB1204@tishler.net>

AdSR,

On Tue, Jan 27, 2004 at 09:46:36AM -0500, Jason Tishler wrote:
> On Thu, Jan 22, 2004 at 02:19:31PM -0800, AdSR wrote:
> > Sometimes when I launch my script under Cygwin, I get strange error
> > messages like:
> > 
> >       2 [win] python 1912 Winmain: Cannot register window class
> > 
> > Sometimes all of the threads run OK, otherwise after the "correct"
> > ones finish the console stops responding anyway.
> 
> FWIW, I cannot reproduce the above problem under:
> 
>     $ cygcheck -cd cygwin python
>     Cygwin Package Information
>     Package              Version        
>     cygwin               1.5.5-1        
>     python               2.3.2-1
> 
> and
> 
>     Windows 2000 SP4

I "spoke" too soon -- I was able to reproduce the problem after 160
iterations.  Please try the latest snapshot:

    http://cygwin.com/snapshots/

and report back whether or not this solves your problem.

Thanks,
Jason

-- 
PGP/GPG Key: http://www.tishler.net/jason/pubkey.asc or key servers
Fingerprint: 7A73 1405 7F2B E669 C19D  8784 1AFD E4CC ECF4 8EF6



From james at logicalprogression.net  Wed Jan 21 15:51:50 2004
From: james at logicalprogression.net (James Henderson)
Date: Wed, 21 Jan 2004 20:51:50 +0000
Subject: Need help with Python class idioms
In-Reply-To: <f5c5dc88.0401211243.7e81a26b@posting.google.com>
References: <f5c5dc88.0401211243.7e81a26b@posting.google.com>
Message-ID: <200401212051.50411.james@logicalprogression.net>

On Wednesday 21 January 2004 8:43 pm, Tad Marko wrote:
> Howdy!
>
> I'm trying to get my head around Python and I've come to realize that
> there are a lot of idioms in Python that are a bit different than in
> other languages. I have a class similar to what I've included below.
> The only difference is that in the real class, I have even more
> mandatory attributes. Too many to specify at once on a constructor and
> they don't always exist at construction time anyway, so the accessor
> idiom must remain.
>
> Can anyone suggest a more Pythony way to do the following?
>
> Thanks,
> Tad
>
> #!/bin/env python
>
> class A:
>     def __init__(self):
>         self.mandatoryVar1 = None
>         self.mandatoryVar2 = None
>
>     def setMV1(self, mv1):
>         self.mandatoryVar1 = mv1
>
>     def setMV2(self, mv2):
>         self.mandatoryVar2 = mv2
>
>     def saveToDB(self, db):
>         if self.mandatoryVar1 == None:
>             raise Exception, "Mandatory Var 1 not set."
>         if self.mandatoryVar2 == None:
>             raise Exception, "Mandatory Var 2 not set."
>
>         # Using db, do whatever saving stuff is needed.

What about this:

class A:
    def __init__(self, mandatoryVar1, mandatoryVar2):
        self.mandatoryVar1 = mandatoryVar1
        self.mandatoryVar2 = mandatoryVar2

-- 
James Henderson, Logical Progression Ltd.
http://www.logicalprogression.net/
http://sourceforge.net/projects/mailmanager/




From python at rcn.com  Mon Jan 12 04:25:26 2004
From: python at rcn.com (Raymond Hettinger)
Date: 12 Jan 2004 01:25:26 -0800
Subject: Division oddity
References: <ssn3009029rrug3l8dk1pn06tqd019ucld@4ax.com>
	<7xeku5vrn8.fsf@ruckus.brouhaha.com>
Message-ID: <5d83790c.0401120125.7d186102@posting.google.com>

[Tim Rowe]
> > If I do from __future__ import division then eval(1/2) gives me 0.5 as
> > expected. But if I do print input("enter a sum: ") and enter 1/2 as
> > the sum I get 0 as if I hadn't done the import.  I thought input was
> > supposed to give the same behaviour as an eval on raw input -- why the
> > difference here?

[Paul Rubin[
> The input function is calling eval from the context of the module
> where 'input' itself is defined.  If you use "from __future__ import
> division" in module A and have "print 3/2" in module B, the value of
> 3/2 in module B shouldn't be affected by the input, since module B
> may depend on integer division having the old behavior.

Right!

So, the way to get eval() to respond to the import is to pass along
the current environment:

>>> from __future__ import division
>>> eval('9/2', globals())
4.5


Raymond Hettinger


From firephreek at earthlink.net  Thu Jan 29 09:43:36 2004
From: firephreek at earthlink.net (firephreek)
Date: Thu, 29 Jan 2004 07:43:36 -0700
Subject: Threads - where to start?
Message-ID: <001d01c3e676$46f02ae0$6f01010a@Rachel>

A while back I posted asking about a problem I was having with some threads.
Somebody responded back with a link to a slide show, but with the little bit
of background I have in this subject, I wasn't able to come away with a
whole lot, much less a solution to my problem.  Where can I go if I want to
get a good understanding of threads and how to implement them?  I'm not sure
what exactly is meant by blocking or locking, or when they should be
implemented. Most of the examples I've read through seem to use the
'threading.py' module as a base for their own class of threads.  Is this the
purpose of threading.py?  Or can it be used standalone?  What about
communicating across threads?  Do they have their own namespace?  Can they
refer to globals in the main program?  Why won't some of them just die?  

I have a lot of questions, but I just don't know where to go!  Help!

Stryder


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From tzot at sil-tec.gr  Sat Jan  3 10:22:14 2004
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Sat, 03 Jan 2004 17:22:14 +0200
Subject: SMTP - Topic & add files
References: <1073137983.983243@news.liwest.at>
Message-ID: <nfndvvke0stkrpao4hqgnr4o27amksif56@4ax.com>

On Sat, 3 Jan 2004 15:19:17 +0100, rumours say that "EsC"
<christian.eslbauer at liwest.at> might have written:

>probably a dummy question, but i don't
>know how to set a Topic-Text and add
>Files to an email ...
>
>i use the SMTPLIB module and the
>function/method: .sendmail(from,to,msg)
>
>but how can i set a topic Text?
>is there an other function/method, or
>must it be encoded within the message-text?

To prepare the body of your email message, you need the email package;
check it in the documentation.
-- 
TZOTZIOY, I speak England very best,
Ils sont fous ces Redmontains! --Harddix


From gerrit at nl.linux.org  Thu Jan  8 08:25:07 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Thu, 8 Jan 2004 14:25:07 +0100
Subject: PRE-PEP: new Path class
In-Reply-To: <1073567709.3ffd57dda8cb0@mcherm.com>
References: <1073567709.3ffd57dda8cb0@mcherm.com>
Message-ID: <20040108132507.GA3792@nl.linux.org>

Michael Chermside wrote:
> I agree... paths should be immutable.
> 
> Instead of .normalize_inplace() which changes the behavior of the
> Path, how about .get_normalized_string() (please find a better name)
> which allows access to the normalized version without mutating the
> Path object? (Or perhaps it should be .get_normalized_Path()... I'm
> not sure.)

If we make it immutable, we can simply do path.normalize(), which
returns the normalized path. Or am I overlooking something?

yours,
Gerrit.

-- 
147. If she have not borne him children, then her mistress may sell her
for money.
          -- 1780 BC, Hammurabi, Code of Law
-- 
PrePEP: Builtin path type
    http://people.nl.linux.org/~gerrit/creaties/path/pep-xxxx.html
Asperger's Syndrome - a personal approach:
	http://people.nl.linux.org/~gerrit/english/



From mksql at yahoo.com  Thu Jan  8 12:35:30 2004
From: mksql at yahoo.com (mksql at yahoo.com)
Date: Thu, 08 Jan 2004 12:35:30 -0500
Subject: Scrolling graphs in a Tk GUI?
References: <shiovv499bsp9sba0vb56del4l00nkj1jh@4ax.com>
	<iK0Lb.70248$hf1.267@lakeread06>
Message-ID: <c35rvvcq5i0ev2uf95vv625q0e43e5tj3e@4ax.com>

On Wed, 07 Jan 2004 18:36:49 -0500, John Grayson <johngrayson at cox.net> wrote:

>You'll find an example in Python and Tkinter Programming...

I can't find any copies to purchase. Every vendor I know is out.



From cphsu at zen.com.tw  Fri Jan  9 06:24:31 2004
From: cphsu at zen.com.tw (Kent Hsu (Hsu, Chih-Peng))
Date: Fri, 9 Jan 2004 19:24:31 +0800
Subject: Py2Exe and a simple COM Windows Program (can't import pythoncom)
References: <982e9537.0401071249.4d75c8fb@posting.google.com>
Message-ID: <btm383$jue$1@news.seed.net.tw>

Just include the 'pythoncom23.dll'. (usally can be found in
%windir%/system32 -> Windows 2000).

Best Regards,
Kent Hsu

Brian Hlubocky <hlubocky at uiuc.edu> wrote in message
news:982e9537.0401071249.4d75c8fb at posting.google.com...
> I'm have a fairly simple (in terms of COM) python program that pulls
> info from an Access database and creates Outlook contacts from that
> information. It uses wxPython for gui and works without problems.
>
> I want to be able to distribute this program using py2exe, but I am
> having some problems. I am using a simple setup.py like in the
> documentation for the py2exe tool and everything compiles ok, except
> that when I run the exe, I get an exception that says "ImportError: no
> module named pythoncom." My program used win32com (which appears to be
> loaded fine with the executable) until I needed thread support for the
> gui. In order to do this, I needed to import pythoncom and call
> CoInitialize() and CoUninitialize() manually for the new thread. I
> believe it is this use of the pythoncom module that py2exe is having
> trouble with.
>
> I tried adding "pythoncom" to the import list in the distutils
> setup.py but the py2exe tool gave me a warning that said it couldn't
> be located. I am able to import this module just fine in python
> scripts and at the interpreter. I am relatively new to COM and its use
> with python as well as with distutils and py2exe. If anyone could help
> me out with this, it would be greatly appreciated!
>
> Thanks,
> Brian




From haim at babysnakes.org  Sun Jan 18 16:11:51 2004
From: haim at babysnakes.org (Haim Ashkenazi)
Date: Sun, 18 Jan 2004 23:11:51 +0200
Subject: newbie question about compression and ascii
References: <mailman.470.1074442222.12720.python-list@python.org>
	<buefnq$koc$1@nadya.doma>
Message-ID: <buesqo$f2q$1@sea.gmane.org>

Serge Orlov wrote:

> 
> "Haim Ashkenazi" <haim at babysnakes.org> wrote in message
> news:mailman.470.1074442222.12720.python-list at python.org...
>> Hi
>>
>> I'm a real newbie, so sorry if this is a trivial question.
>>
>> I'm writing a script that collect a list of files and creates a zipfile
>> from these files. when running it on linux everything works fine, but
>> when I'm running it on windows I get this error when running the command:
>>
>> myZip.write(file)
>>
>> UnicodeDecodeError: 'ascii' codec can't decode byte 0xa8 in position 10:
>> ordinal not in range(128)
>>
>> the file variable contains: u'C:\\Document and Settings\\haim\etc...'.
> 
> A unicode file name... Zip format doesn't support unicode file names.
> 
>>
>> is there a way to solve this?
> 
> Only work around. Encode the unicode string using an encoding
> of your choice. For windows it's probably "mbcs":
> if isinstance(file_name, unicode):
>     myZip.write(file_name.encode('mbcs'))
thanx, this seem to solve the problem. 

Bye

> 
> -- Serge.

--
Haim




From eric.brunel at N0SP4M.com  Mon Jan 19 09:38:57 2004
From: eric.brunel at N0SP4M.com (Eric Brunel)
Date: Mon, 19 Jan 2004 15:38:57 +0100
Subject: Setting Window Size using Pack Under Tkinter
References: <8089854e.0401160134.5674a86c@posting.google.com>
	<4007de09$0$151$e4fe514c@dreader5.news.xs4all.nl>
	<4007dedc$0$166$e4fe514c@dreader5.news.xs4all.nl>
	<8089854e.0401190350.61b3efc@posting.google.com>
Message-ID: <bugpmi$ibo$1@news-reader1.wanadoo.fr>

Fuzzyman wrote:
> Short of actually trying it...... (when I get home I *will* try it)
> 
> Would the following work :
> 
>  from Tkinter import *
>  gui=Tk()
>  Button(gui, text='A button', command=a_function).pack()
> 
>   ####code####
>  gui.geometry("+%d+%d" %(300, 100))
>  gui.resizable(0,0)
>  gui.mainloop()
> 
> ??

Yes it will. Note however that doing gui.geometry("+300+100") will actually move 
the window, not resize it. To resize the window, use gui.geometry("300x100")

More generally, the syntax for the geometry is "WxH+X+Y" where W and H are the 
window's width and height resp. and X & Y the coordinates of its top-left corner 
from the top-left corner of the screen.

> If I recall correctly it ought to.... (mixing the pack and geometry
> methods in the same GUI)...
> 
> Anyway - thanks.
> 
> Fuzzy
> 
> 
> "duikboot" <arjen.dijkstraNoSpam at hccnet.nl> wrote in message news:<4007dedc$0$166$e4fe514c at dreader5.news.xs4all.nl>...
> 
>>from Tkinter import *
>> gui=Tk()
>>
>> ####code####
>> gui.geometry("+%d+%d" %(300, 100))
>> gui.resizable(0,0)
>> gui.mainloop()
>>
>>Will work offcourse too.. :-)
>>
>>cheers,
>>
>>Arjen
>>
>>
>>
>>"duikboot" <arjen.dijkstraNoSpam at hccnet.nl> schreef in bericht
>>news:4007de09$0$151$e4fe514c at dreader5.news.xs4all.nl...
>>
>>>from Tkinter import *
>>>gui=Tk()
>>>
>>>####code####
>>>gui.geometry("+%d+%d" %(300, 100))
>>>gui.resizable(0,0)
>>>
>>>if __name__=='__main__':
>>>    gui.mainloop()
>>>
>>>
>>>
>>>
>>>"Fuzzyman" <michael at foord.net> schreef in bericht
>>>news:8089854e.0401160134.5674a86c at posting.google.com...
>>>
>>>>I'm having trouble implementing my GUI using Tkinter......
>>>>I've been working through the Tkinter tutorials from 'Programming
>>>>Python' and am generally happy enough with the functionality and feel
>>>>of the results *but* - I can't see how to set the size of the root
>>>>window (or any top level window) and to stop it being resized........
>>>>
>>>>Thanks for any help.
>>>>
>>>>Fuzzyman
>>>>
>>>>
>>>>--
>>>>
>>>>YAPLP
>>>>Yet Another Python Links Page
>>>>http://www.voidspace.org.uk/coollinks/python_links.shtml
>>>>
>>>>Python Utils
>>>>http://www.voidspace.org.uk/atlantibots/pythonutils.html
>>>>
>>>>--
>>>>
>>>>http://www.Voidspace.org.uk
>>>>The Place where headspace meets cyberspace. Online resource site -
>>>>covering science, technology, computing, cyberpunk, psychology,
>>>>spirituality, fiction and more.
>>>>
>>>>---
>>>>http://www.atlantibots.org.uk
>>>>http://groups.yahoo.com/group/atlantis_talk/
>>>>Atlantibots - stomping across the worlds of Atlantis.
>>>>---
>>>>http://www.fuchsiashockz.co.uk
>>>>http://groups.yahoo.com/group/void-shockz
>>>>---
>>>>
>>>>Everyone has talent. What is rare is the courage to follow talent
>>>>to the dark place where it leads. -Erica Jong
>>>>Ambition is a poor excuse for not having sense enough to be lazy.
>>>>         -Milan Kundera
>>>
>>>


-- 
- Eric Brunel <eric dot brunel at pragmadev dot com> -
PragmaDev : Real Time Software Development Tools - http://www.pragmadev.com



From kim at lignus.dk  Fri Jan 23 05:41:37 2004
From: kim at lignus.dk (Kim Petersen)
Date: Fri, 23 Jan 2004 11:41:37 +0100
Subject: Help and optimization hints, anyone?
Message-ID: <pan.2004.01.23.10.41.31.93597@lignus.dk>

I've worked on this table object a bit too long - and seem to have
stared too long at the code. Can someone see where it goes wrong in
the insertrow function?

Also optimization hints and alternatives will be greatly appreciated.

<code>
#!env python
#
# created: "15:19 20/01-2004" by Kim Petersen <kim at vindinggaard.dk>
#
# $Id$
#
import Tkinter

class UserDict:
   defaults={}
   def __init__(self,inherit=None):
      if not inherit:
         self.inherit=[]
      else:
         self.inherit=inherit
      self.dict=self.defaults.copy()

   def __setitem__(self,name,value): self.dict[name]=value

   def __getitem__(self,name):
      if not self.dict.has_key(name):
         for dict in self.inherit:
            if dict.has_key(name):
               return dict[name]
         raise KeyError,"%s not found" % (name,)
      return self.dict[name]

   def haskey(self,name): return self.dict.has_key(name)

class Cell(UserDict):
   defaults={"width": 0,"height": 0,"text": '',"color": "black","background": "white",
            "widgets": None}
   def __init__(self,master,row,column,text):
      UserDict.__init__(self,[row,column])
      self.master=master
      self["text"]=text
      self.row=row                      # these are needed for us to find the actual row/col
      self.column=column
      self.create()

   def create(self):
      """Create the widgets the first time (might inflict up to two resize's)"""
      x,y=self.column["x"],self.row["y"]
      w,h=self.column["width"],self.row["height"]
      r=self.master.create_rectangle((x,y,x+w,y+h),fill=self["background"])
      t=self.master.create_text((x+self.master.colpadding,y+h/2),
                                text=self["text"],
                                anchor="w",fill=self["color"])
      self["widgets"]=[r,t]
      bbox=self.master.bbox(t)
      self["width"]=bbox[2]-bbox[0]
      self["height"]=bbox[3]-bbox[1]
      if self["width"]+self.master.colpadding*2>w:
         self.column.resize(self["width"]+self.master.colpadding*2)
         self.resize()
      if self["height"]+self.master.rowpadding*2>h:
         self.row.resize(self["height"]+self.master.rowpadding*2)
         self.resize()

   def resize(self):
      """Resize according to the width/height given by row,column"""
      x,y=self.column["x"],self.row["y"]
      w,h=self.column["width"],self.row["height"]
      self.master.coords(self["widgets"][0],(x,y,x+w,y+h))
      self.master.coords(self["widgets"][1],(x+self.master.colpadding,y+h/2))

   def move(self,dx,dy):
      """Relatively move according to delta's"""
      self.master.move(self["widgets"][0],dx,dy)
      self.master.move(self["widgets"][1],dx,dy)

class Column(UserDict):
   """ """
   defaults={"x": 0,"width": 0,"label": '',"tag": ''}

   def __init__(self,master,label='',before=None):
      UserDict.__init__(self)
      self.master=master
      if master.columns:
         if not before or before>0:
            if not before:
               after=(-1)
            else:
               after=before-1
            self.dict["x"]=master.columns[after]["x"]+master.columns[after]["width"]
            # since we have a width of 0 there is no need to move the rest of the columns.
      
   def calcwidth(self):
      """Calculate the *actually* needed width of the column (*not* the current one)."""
      width=0
      for row in self.master.rows:
         width=max(self.master.cells[(row,self)]["width"],width)
      return width+self.master.colpadding*2

   def resize(self,width):
      # calc delta, set new width
      dx=width-self["width"]
      self["width"]=width
      ci=self.master.columns.index(self)
      # resize the cells
      for row in self.master.rows:
         try:
            self.master.cells[(row,self)].resize()
         except KeyError:
            pass
      # move columns to the right further to the right
      for i in range(ci+1,len(self.master.columns)):
         self.master.columns[i].move(dx)

   def move(self,dx):
      self["x"]=self["x"]+dx
      # move the cells correspondingly
      for row in self.master.rows:
         try:
            self.master.cells[(row,self)].move(dx,0)
         except KeyError:
            pass

class Row(UserDict):
   defaults={"y": 0,"height": 0,"label": '',"tag": ''}
   def __init__(self,master,label,before=None):
      UserDict.__init__(self)
      self["label"]=label
      # now insert it.
      self.master=master
      if master.rows:
         if not before or before>0:
            if not before:
               after=(-1)
            else:
               after=before-1
            self.dict["y"]=master.rows[after]["y"]+master.rows[after]["height"]
   
   def calcheight(self):
      """Calculate the *actually* needed width of the column (*not* the current one)."""
      height=0
      for row in self.master.columns:
         height=max(self.master.cells[(self,column)]["height"],height)
      return height+self.master.rowpadding*2

   def resize(self,height):
      dy=height-self.dict["height"]
      self.dict["height"]=height
      ri=self.master.rows.index(self)
      for column in self.master.columns:
         if self.master.cells.has_key((self,column)):
            self.master.cells[(self,column)].resize()
      for i in range(ri+1,len(self.master.rows)):
         self.master.rows[i].move(dy)

   def move(self,dy):
      self.dict["y"]=self.dict["y"]+dy
      for col in self.master.columns:
         try:
            self.master.cells[(self,col)].move(0,dy)
         except KeyError:
            pass
      pass

   def moveto(self,y):
      self.move(y-self.dict["y"])

   def __setitem__(self,name,value):
      if name=="height":
         self.resize(value)
      elif name=="y":
         self.move(value-self["y"])
      else:
         self.dict[name]=value

class Table(Tkinter.Canvas):
   """A table object - it consists of a number of cells layed out in rows and columns

      A row has a specific height
      A row can have a label
      A column has a specific width
      A column can have a label
      """
      
   def __init__(self,master,**args):
      Tkinter.Canvas.__init__(self,master,**args)
      self.colpadding=2
      self.rowpadding=2
      self.columns=[]                   # each item contains data about the column
      self.rows=[]                      # each item contains data about the row
      self.cells={}                      # index: (row,col)

   def insertrow(self,pos,values):
      self.rows[pos:pos]=[Row(self,'',pos)]
      row=self.rows[pos]
      for i in range(len(values)):
         if i<len(self.columns):
            col=self.columns[i]
         else:
            self.columns.append(Column(self,''))
            col=self.columns[-1]
         self.cells[(row,col)]=Cell(self,row,col,values[i])

   def row_add(self,values):
      self.rows.append(Row(self,''))
      row=self.rows[-1]
      for i in range(len(values)):
         if i<len(self.columns):
            col=self.columns[i]
         else:
            self.columns.append(Column(self,''))
            col=self.columns[-1]
         self.cells[(row,col)]=Cell(self,row,col,values[i])

if __name__=="__main__":
   tk=Tkinter.Tk()
   tk.grid_rowconfigure(1,weight=1)
   tk.grid_columnconfigure(1,weight=1)
   tk.wm_geometry("800x1150+0+0")

   table=Table(tk)
   table.grid(row=1,column=1,sticky="nsew")
   for line in open("/etc/passwd","r"):
      values=unicode(line.strip(),"iso8859-1").split(":")
      #tk.update()
      #table.insertrow(0,values)
      table.row_add(values)
   for row in table.rows:
      print row["y"],row["height"]
   tk.mainloop()

# Local Variables:
# tab-width: 3
# py-indent-offset: 3
# End:
</code>
-- 
Privat  ==========================  Kim Petersen  ====================  Arbejde
Email kim at vindinggaard.dk  =====  Jens Gr?ns Vej 11  =====  Email kim at lignus.dk
Tlf +45 75 83 15 50  ==============  7100 Vejle  =========  Tlf +45 75 83 15 51
Fax +45 75 83 15 62  =============  DK - Danmark  ========  Fax +45 75 83 15 62




From bkelley at wi.mit.edu  Fri Jan 16 11:44:57 2004
From: bkelley at wi.mit.edu (Brian Kelley)
Date: Fri, 16 Jan 2004 11:44:57 -0500
Subject: Why gmp is not in the standard library?
In-Reply-To: <mailman.418.1074201211.12720.python-list@python.org>
References: <4f0a9fdb.0401150211.615a7f45@posting.google.com>
	<mailman.418.1074201211.12720.python-list@python.org>
Message-ID: <400814a7$0$562$b45e6eb0@senator-bedfellow.mit.edu>

Tim Churches wrote:
> Of course, someone would need to prepare Python-style docs, and someone
> would need to track GMP development and update the version included with
> Python at each release (the current gmpy developers perhaps) - thus I
> suspect it is more a resourcing issue than anything else. However, if
> some dead wood is ever removed from the Python standard library, I would
> love to see gmpy take its place. Thanks to the gmpy (and GMP) developer,
> BTW.

Isn't some of this work done?

http://www.lemburg.com/files/python/mxNumber.html

Brian




From vc_smtp at sikikusa.nims.go.jp  Mon Jan 19 01:17:14 2004
From: vc_smtp at sikikusa.nims.go.jp (vc_smtp at sikikusa.nims.go.jp)
Date: Mon, 19 Jan 2004 15:17:14 +0900
Subject: Virus Alert
Message-ID: <200401190617.i0J6HErX024118@sikikusa.nims.go.jp>

Have detected a virus (WORM_BAGLE.A) in your mail traffic on 01/19/2004 15:06:36 with an action quarantined.



From noemail at noemail4u.com  Tue Jan 27 09:36:27 2004
From: noemail at noemail4u.com (Dang Griffith)
Date: Tue, 27 Jan 2004 14:36:27 GMT
Subject: Batch commands on Windows
References: <7A3Qb.4870$AK2.3953@newssvr29.news.prodigy.com>
	<mailman.689.1074867434.12720.python-list@python.org>
	<grmQb.15157$yd7.13778@newssvr27.news.prodigy.com>
Message-ID: <74cb04cf32d1541b34af7a7e53baaee9@news.teranews.com>

On Sat, 24 Jan 2004 04:23:40 GMT, "Moosebumps" <crap at crud.com> wrote:

>> Can you give an example of what you mean, in Perl as well as what you
>hoped
>> would work in Python? I couldn't quite understand what it is that you're
>trying
>> to do.
>
>OK, actually on second test, the problem is mostly with IDLE, but not
>totally.  When I hit F5 under IDLE, it behaves differently with respect to
>the command window then if I just run it by double-clicking on the file.
>
>Here is an example:
>
>BatchTest.bat:
>
>set MYVAR=3
>dir
>pause
>dir
>echo %MYVAR%
>pause
>
>BatchTest.py:
>
># the intention is to do the same thing as BatchTest.bat, but it doesn't
>work under either IDLE or by double-clicking
># in particular the environment variable is not saved, and it doesn't work
>if I replace os.system with os.popen
>
>import os
>
>os.system("set MYVAR=3")
>os.system("dir")
>os.system("pause")
>os.system("dir")
>os.system("echo %MYVAR%")
>os.system("pause")
>
>BatchTest.pl:
>
># this actually does the same thing as Python, I was mistaken.  I was
>mislead by the IDLE behavior.
>
>system('set MYVAR=3');
>system('dir');
>system('pause');
>system('dir');
>system('echo %MYVAR%');
>system('pause');
>
>The general idea is that it would be nice if there weren't any differences
>between the batch file and python.  From a practical standpoint, it would
>encourage a lot of people to switch from nasty batch files to Python scripts
>if you could just surround the entire thing with os.batch(' ') or some
>similar sort of mechanical textual substitution.  Then you could clean it up
>gradually.
>
>I am aware of os.environ and such, and that is useful, but it's not really
>the point.
>
>Of course I could write a function to take a bunch of strings, write a batch
>file, save the working directory, execute it, restore the current directory,
>then delete the batch file, but that seems like an awful hack.  Though I
>probably will do that at some point.
>
>> > What's the deal with that?  I thought Python started out as a scripting
>> > language.  And that seems like the most basic thing that a scripting
>> > language should do.
>>
>> Dunno, although MS-DOS shell scripting is certainly a small subset of
>scripting
>> in general. Maybe with a concrete example somebody will be able to give
>you a
>> hand.
>
>It is a small subset, but an important subset.  Shell scripting started
>probably when people got sick of typing the same commands into the prompt.
>For a language to really support shell scripting, it should provide a way of
>automating the process of typing in the commands.  As in, there should be no
>difference whether you're actually typing, or you're running the script.
>
>If there is a way and I don't know about it, I would be happy to hear about
>it.  But I do think it is a pretty big hole.
>
>MB
>
If you're looking for more shell-like behavior, look into IPython at
http://ipython.scipy.org/.  Although it still won't "export" your
environment variables, or make your calls to os.system have a unique
environment, you can do things like 'ls' (you can probably configure
dir to work, but by default it provides access to the python builtin
function of that name).

Here is an excerpt that does some of the things in Mooosebump's
sample:

        In [15]: import os
        In [16]: os.environ['MYVAR'] = '3'
        In [17]: os.system('echo %MYVAR%')
        3
        Out[17]: 0
        In [18]: cd \
        C:\
        In [19]: ls /w/ad P*
         Volume in drive C has no label.
         Volume Serial Number is A096-107C

         Directory of C:\

        [Program Files] [Python23]
                       0 File(s)       0 bytes
                       2 Dir(s)  871,232 bytes free


Notice the unescaped backslash in line 18, and the "DOS" command line
options "/w/ad" and "P*" wildcard on line 19.

This still might not be what you're after, but it's a step in the
right direction.
    --dang


From missive at frontiernet.net  Mon Jan 19 10:52:32 2004
From: missive at frontiernet.net (Lee Harr)
Date: Mon, 19 Jan 2004 15:52:32 GMT
Subject: Python 2.3.3 on FreeBSD 4.8
References: <mailman.491.1074481524.12720.python-list@python.org>
Message-ID: <slrnc0nv38.2tkb.missive@homer.easthighschool.net>

On 2004-01-19, Taylor Leese <tleese22 at yahoo.com> wrote:
> I am trying to compile Python 2.3.3 on FreeBSD 4.8 and
> I am getting this compiling error. Anybody have any
> ideas?
>


Are you building from ports?  ie..

cd /usr/ports/lang/python
make

?



From michele.simionato at poste.it  Mon Jan 19 11:52:10 2004
From: michele.simionato at poste.it (Michele Simionato)
Date: 19 Jan 2004 08:52:10 -0800
Subject: YA string interpolation and printing idea
References: <7x3caf5mga.fsf_-_@ruckus.brouhaha.com>
	<4008B9CE.CC140EF@alcyone.com> <7xwu7r6utj.fsf@ruckus.brouhaha.com>
	<gk8n005kohqq4g39hul6huj7i0ta2f71fg@4ax.com>
Message-ID: <95aa1afa.0401190852.18a939f5@posting.google.com>

Christos "TZOTZIOY" Georgiou <tzot at sil-tec.gr> wrote in message news:<gk8n005kohqq4g39hul6huj7i0ta2f71fg at 4ax.com>...
> On 16 Jan 2004 20:52:08 -0800, rumours say that Paul Rubin
> <http://phr.cx at NOSPAM.invalid> might have written:
> 
> >Maybe if type/object
> >unification proceeds far enough, we'll someday be able to define our
> >own operations on builtin objects like strings.
> 
> I'd like that too, and I believe Ruby does it; however, ISTR that Guido
> has specifically said that this won't be allowed, since you can always
> subclass the base types.  He's the boss :)
> 
> I've also seen a hackish patch (by MWH? can't be sure) that allowed one
> to substitute their own classes for the base types (so that integer or
> string constants would be instances of the derived subclasses).  Don't
> know if that would help you in your code.

In Python, you cannot change built-in types, but you can always derive
a new type with additional methods and give to the new type the name
of a built-in type. So, we don't miss much of Ruby functionality, we just
miss is a bit of sugar. Also, knowing that the builtins types are fixed,
gives me some sense of safety ...

   Micjele


From ian at ibygrave.no-ip.org  Fri Jan  9 16:03:54 2004
From: ian at ibygrave.no-ip.org (ian)
Date: Fri, 09 Jan 2004 21:03:54 +0000
Subject: Variable Scope 2 -- Thanks for 1.
References: <dcde6f.0401091247.c17b76e@posting.google.com>
	<btn4hq$2om$1@fred.mathworks.com>
Message-ID: <pan.2004.01.09.21.03.54.911529@ibygrave.no-ip.org>

On Fri, 09 Jan 2004 20:56:26 +0000, JCM wrote:
> Assignment rebinds variables to different objects, so b now holds a
> reference to the list created by the expression [].

As assignment binds but doesn't copy, you might ask

http://www.python.org/doc/faq/programming.html#how-do-i-copy-an-object-in-python

--IAN



From peter at engcorp.com  Mon Jan 19 13:46:23 2004
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 19 Jan 2004 13:46:23 -0500
Subject: Delayed evaluation and setdefault()
References: <buh6j1$bub$1@news.tudelft.nl>
Message-ID: <400C25FF.A76B1FEA@engcorp.com>

Leo Breebaart wrote:
> 
>    >>> d.setdefault('foo', b())
> then b() *does* get executed regardless of whether or not the
> value it returns is actually used ('foo' was not found) or not
> ('foo' was found).
> 
> So I guess my question is twofold: one, do people think
> differently, and if so why?; and two: is there any elegant (or
> other) way in which I can achieve the delayed evaluation I desire
> for setdefault, given a side-effect-having b()?

def lazysetdefault(dict, key, ref):
    if not dict.has_key(key):
        dict[key] = ref()
    return dict[key]

>>> d = {}
>>> lazysetdefault(d, 'foo', b)

-Peter


From k.robert at gmx.de  Wed Jan 21 07:25:21 2004
From: k.robert at gmx.de (Robert)
Date: 21 Jan 2004 04:25:21 -0800
Subject: interface to win job scheduler portable from win98 .. winXP /
	cmdline or COM ?
References: <mailman.536.1074589511.12720.python-list@python.org>
	<r7xuna4l.fsf@python.net>
Message-ID: <19804fd8.0401210425.7130ea85@posting.google.com>

this COM interface seems to be right for my problem. but I don't get a
handle on it.
I am only familiar with things like
o=win32com.client.Dispatch("Excel.Application") and navigate.
Is it possible this way? I didn't find anywhere a hint for such
exported Class Name.
I only found a "CLSID" and know little about that. I tried the
following. But he says "interface not supported" but seems that he
finds anything ... ?


>>> from win32com.client import Dispatch
>>> Dispatch("{148BD520-A2AB-11CE-B11F-00AA00530503}")
Traceback (most recent call last):
  File "<interactive input>", line 1, in ?
  File "C:\PYTHON23\lib\site-packages\win32com\client\__init__.py",
line 95, in Dispatch
    dispatch, userName =
dynamic._GetGoodDispatchAndUserName(dispatch,userName,clsctx)
  File "C:\PYTHON23\lib\site-packages\win32com\client\dynamic.py",
line 85, in _GetGoodDispatchAndUserName
    return (_GetGoodDispatch(IDispatch, clsctx), userName)
  File "C:\PYTHON23\lib\site-packages\win32com\client\dynamic.py",
line 73, in _GetGoodDispatch
    IDispatch = pythoncom.CoCreateInstance(IDispatch, None, clsctx,
pythoncom.IID_IDispatch)
com_error: (-2147467262, 'Schnittstelle nicht unterst\xfctzt', None,
None)



Robert


Thomas Heller <theller at python.net> wrote in message news:<r7xuna4l.fsf at python.net>...
> Tim Golden <tim.golden at viacom-outdoor.co.uk> writes:
> 
> >>From: Robert [mailto:k.robert at gmx.de]
> >>
> >>I found the os.popen("AT /?") way ....  however it works not on Win98
> >>and the "Day" you enter at the AT are language dependent.
> >>(e.g. Mi(ttwoch) in german, We(dnesday) in english Windows versions)
> >>
> >>I need a solution work from Win98..WinXP most independent from
> >>internationalization etc.
> >>
> >>is there portable way - or at all a way to manipulate the Win98/ME
> >>scheduler ?  if no simple means, even COM stuff would be ok.  any
> >>pointers?
> >>
> >
> > WMI looks like it covers it, but only NT4 / Win2K / XP.
> > Oh, sorry, I've just realised: the Win32_ScheduledJob 
> > actually refers to the AT service (despite the name!)
> >
> > If you're really looking for something which will work
> > across every version of Windows, I think you're better
> > off doing something entirely Python from the start. It
> > shouldn't be hard (he says, having not tried it himself). 
> > The advantage is: it will work everywhere and you have 
> > complete control over it. The disadvantage is: you have 
> > to create your own interface and deal with whatever 
> > issues the existing mechanisms have already dealt with.
> 
> I'll second that this is most certainly the easiest solution.
> 
> There seems to be, however, a COM interface to the Task Scheduler, using
> all custom interfaces:
> 
> <http://msdn.microsoft.com/library/default.asp?url=/library/en-us/taskschd/taskschd/task_scheduler_start_page.asp>
> 
> As usual, the docs aren't that crystal clear, but I get the impression
> that it's even available in win 95, provided that IE4 is installed.
> 
> Thomas


From aahz at pythoncraft.com  Sat Jan  3 10:26:09 2004
From: aahz at pythoncraft.com (Aahz)
Date: 3 Jan 2004 10:26:09 -0500
Subject: Optimized quoting (was Re: Speed?)
References: <5.2.0.9.0.20040102221218.00b7c870@mail.zomething.com>
	<mailman.43.1073115353.12720.python-list@python.org>
Message-ID: <bt6muh$bog$1@panix3.panix.com>

In article <mailman.43.1073115353.12720.python-list at python.org>,
John Hunter  <jdhunter at ace.bsd.uchicago.edu> wrote:
>
>Donald Knuth, God of Computer Science, said "Premature optimization is
>the root of all evil".  

If Knuth is God, then Hoare is God's father:

"Premature optimization is the root of all evil in programming."
--C.A.R. Hoare (often misattributed to Knuth, who was himself quoting Hoare)

"We should forget about small efficiencies, say about 97% of the time:
premature optimization is the root of all evil."  --Knuth restates Hoare
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

Weinberg's Second Law: If builders built buildings the way programmers wrote 
programs, then the first woodpecker that came along would destroy civilization.


From serve at detongiser.com  Thu Jan 15 14:43:33 2004
From: serve at detongiser.com (Servé Lau)
Date: Thu, 15 Jan 2004 20:43:33 +0100
Subject: The GPL / BSD cultural divide (was ProtoCiv: porting Freeciv to
	Python CANNED)
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<n22Nb.11299$9k7.210522@news.xtra.co.nz>
	<bu2pgs$d123a$1@ID-207230.news.uni-berlin.de>
	<4004EC9E.1E2E2893@alcyone.com> <bu3iv2$n2u$4@tyfon.itea.ntnu.no>
	<bu4dii$daqjq$1@ID-207230.news.uni-berlin.de>
	<a%uNb.5410$HR.11098@news.indigo.ie>
Message-ID: <100drb1371jmq67@corp.supernews.com>

"Gerry Quinn" <gerryq at indigo.ie> wrote in message
news:a%uNb.5410$HR.11098 at news.indigo.ie...
> As somebody once said, the purpose of paying wages is not to motivate
> people to work.  It's to motivate them to come in on Monday mornings.
>
> Think of the boring bits as commercial software's secret weapon ;-)

I agree, most open source is not finished or crappy implemented. At some
point most people lose interest especially when it's not successful.

Yes, there are exceptions.




From claird at lairds.com  Mon Jan 12 16:33:44 2004
From: claird at lairds.com (Cameron Laird)
Date: Mon, 12 Jan 2004 21:33:44 -0000
Subject: C++ bad-mouthing (was: Why learn Python ??)
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<7xisjh1e3i.fsf@ruckus.brouhaha.com>
Message-ID: <10064loqc7sd7e3@corp.supernews.com>

In article <7xisjh1e3i.fsf at ruckus.brouhaha.com>,
Paul Rubin  <http://phr.cx at NOSPAM.invalid> wrote:
			.
			.
			.
>I'd say don't bother with C++ unless you're working on a big
>multi-person project.  Its design will make no sense to you unless
>you've faced the problems that come up in those projects.  Otherwise
>it's a big mess.
			.
			.
			.
And if you *are* working on a big multi-person project, and you
choose C++, you're likely to end up with ... a big mess.

I get to say so.  I'm fond of C++, and have seen plenty of pro-
jects which rely on it.  I've also seen the teams assigned to
such projects ...
-- 

Cameron Laird <claird at phaseit.net>
Business:  http://www.Phaseit.net


From jzgoda at gazeta.usun.pl  Wed Jan 21 14:28:53 2004
From: jzgoda at gazeta.usun.pl (Jarek Zgoda)
Date: Wed, 21 Jan 2004 19:28:53 +0000 (UTC)
Subject: python As400
References: <mailman.574.1074678559.12720.python-list@python.org>
Message-ID: <bumjtk$f78$1@nemesis.news.tpi.pl>

Enrique <enrique.palomo at xgs-spain.com> pisze:

> i checked before this website, http://www.iseriespython.com/, but found no
> much information in it (docs)

Sorry, I meant "check this site to read documentation for
AS/400-specific modules".

> worse? how much worse? more worse that can be assumed?

I don't know, I never tried to measure it.

> and connect python on windows with db2 in as400??

No chance except ODBC (http://www.egenix.com/) or ADO (i.e. adodbapi on
SourceForge), anyway you will need Client Access installed.

-- 
Jarek Zgoda
Unregistered Linux User #-1
http://www.zgoda.biz/ JID:zgoda-a-chrome.pl http://zgoda.jogger.pl/


From jar at netscape.com  Mon Jan 19 00:04:13 2004
From: jar at netscape.com (jar at netscape.com)
Date: Mon, 19 Jan 2004 14:04:13 +0900
Subject: Hi
Message-ID: <smmxisiyjwqushvpayj@netscape.com>

------------------  Virus Warning Message (on the network)

Found virus WORM_BAGLE.A in file ihm.exe
The uncleanable file ihm.exe is moved to /etc/iscan/virus/virSKALqaGMn.

---------------------------------------------------------
-------------- next part --------------
 Test =)
ljbeubmajcklyxfk
--
Test, yep.
-------------- next part --------------

------------------  Virus Warning Message (on the network)

ihm.exe is removed from here because it contains a virus.

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

From spamfilter at macspeno.com  Thu Jan  8 09:43:50 2004
From: spamfilter at macspeno.com (John P. Speno)
Date: Thu, 8 Jan 2004 14:43:50 +0000 (UTC)
Subject: pyserial with Mac and USB converter, possible?
References: <88cd63b8.0401071041.2c4d0f9@posting.google.com>
Message-ID: <btjqb6$k1j$1@netnews.upenn.edu>

In <88cd63b8.0401071041.2c4d0f9 at posting.google.com> jorjun at mac.com (jorjun) writes:

>I am getting into RS232 scripting, but would prefer to use my iBook, is this viable?

It's hard to say without knowing what you want to do, but most likely it is
viable assuming you have a USB to serial adaptor that exposes itself in
/dev. :-)

You may also want to check in with the Mac Python group:

    http://www.python.org/sigs/pythonmac-sig/
    http://homepages.cwi.nl/~jack/macpython/

Take care.


From python at hitmedia.com  Fri Jan 30 00:52:51 2004
From: python at hitmedia.com (Python Baby)
Date: Thu, 29 Jan 2004 21:52:51 -0800
Subject: easiest transition for a PHP website to move to Python?
Message-ID: <20040130055251.GA9734@mail.hitmedia.com>

I've got a database-driven website that's written entirely in PHP.

It's all pretty MVC : NOT embedded little calls inside HTML, but
rather little controller apps in the webroot that merge data with
HTML templates on the fly.

But for various reasons (mostly fun) I want to rewrite it in Python.

There are so many different approaches, though!  Zope, Twisted,
mod_python, clearsilver, and all the goodies in standard library.

What would be the SMOOTHEST TRANSITION for a newbie like me to
rewrite my PHP+MySQL website to Python?


 
(The URL is http://www.musicthoughts.com)



From Johannes.Nix at web.de  Fri Jan  2 12:27:54 2004
From: Johannes.Nix at web.de (Johannes.Nix at web.de)
Date: 02 Jan 2004 18:27:54 +0100
Subject: Zen of ...
References: <20031216183852.GA4318@nl.linux.org>
	<1071600670.1207.3.camel@emilio>
	<mailman.243.1071664149.9307.python-list@python.org>
	<m3zndqky6l.fsf@pc150.maths.bris.ac.uk>
	<brvrp0$lvh$1@panix2.panix.com>
	<m31xr0wgib.fsf@pc150.maths.bris.ac.uk>
	<T2XEb.3$LH.534@news.dircon.co.uk>
Message-ID: <67smiy6z1h.fsf@aster.homelinux.net>

"Carl Caulkett" <carlca at dircon.co.uk> writes:

> When you have forgotton the 19 theses, but yet carry them out in every
> waking moment, then you will have discovered the 20th thesis.
> 

Will this be before or after the forgotten theses are
garbage-collected ?

"Thirty spokes surround a hub:
Where nothing is, 
lies the usefulness of the wheel"   Tao Te King


Johannes


From dk123456789 at REMOVEhotmail.com  Thu Jan 29 19:47:25 2004
From: dk123456789 at REMOVEhotmail.com (Dave K)
Date: Fri, 30 Jan 2004 01:47:25 +0100
Subject: conditional expression sought
References: <pRbSb.330334$ts4.37644@pd7tw3no>
Message-ID: <866j101bbuuhtpan29eop9o4mk1mt7nckn@4ax.com>

On Thu, 29 Jan 2004 17:58:45 GMT in comp.lang.python, "Elaine Jackson"
<elainejackson7355 at home.com> wrote:

>If bool(B_i)==True for 1<=i<=n and j is the smallest i with bool(A_j)==True,
>then the evaluation of (A_1 and B_1) or ... or (A_n and B_n) returns B_j without
>evaluating any other B_i. This is such a useful mode of expression that I would
>like to be able to use something similar even when there is an i with
>bool(B_i)==False. The only thing I can think of by myself is ( (A_1 and [B_1])
>or ... or (A_n and [B_n]) )[0], and I can't be satisfied with that for obvious
>reasons. Does anybody know a good way to express this? Any help will be mucho
>appreciado.
>
>Peace
>

I'm not sure if this is what you're looking for, but for i > a very
small number, the zip function seems more appropriate:

>>> def get_B_i(A, B):
	    for a, b in zip(A, B):
		    if a: return b
	    return A[-1]
>>> print get_B_i([False, False, True, False], [0, 1, 2, 3])
2
>>> print get_B_i([False, False, False, False], [0, 1, 2, 3])
False

This has exactly the same effect provided that A and B are the same
length, otherwise the return value by failure should be adjusted to
whatever suits your purpose.

If you really want to write a conditional expression out in full, I
can't think of anything non-clumsy that would work for all possible
values of B_i, so unfortunately can't help you there.

Dave




From eltronic at juno.com  Sat Jan  3 18:53:54 2004
From: eltronic at juno.com (eltronic at juno.com)
Date: Sat, 3 Jan 2004 18:53:54 -0500
Subject: importing
Message-ID: <20040103.191552.-3883603.1.eltronic@juno.com>

On 3 Jan 2004 12:49:56 -0800 boomer4467 at yahoo.com (Boomer) writes:
> trying to import a .csv file(from excel) 
> into some fields on my company's
> software system(which interfaces to 
> an sql database. Each row in this
> .csv file needs to be split into smaller strings 
 
import csv 
 
#something to the efect of
 
data = file("book1.csv").readlines()
p = csv.parser()
 
for ir in data:
    fields = p.parse(ir)
    if not fields:
        # multi-line record
        continue
    print fields
    #you can take it further from here...
 
older than python 2.3 you have to 
download seperatly the csv module
pre compiled version are available.
http://www.object-craft.com.au/projects/csv
just had the opertunity to use it for
the first time yesterday, worked great!
 
e
please forward all spam  to "me"<u%63e at f%74c.go%76>

________________________________________________________________
The best thing to hit the internet in years - Juno SpeedBand!
Surf the web up to FIVE TIMES FASTER!
Only $14.95/ month - visit www.juno.com to sign up today!



From jepler at unpythonic.net  Tue Jan  6 11:00:36 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Tue, 6 Jan 2004 10:00:36 -0600
Subject: Problems with threads and embedding
In-Reply-To: <3FFAC395.9080900@poelzi.org>
References: <3FFAC395.9080900@poelzi.org>
Message-ID: <20040106160036.GJ18443@unpythonic.net>

On my system, the attached script shows an expected behavior: at first
there are many threads running "daniel.py", then they slowly dwindle
back down to one.  Using slightly different flags to ps (it doesn't know
the "m" flag), I get identical results on redhat 6 (python 1.5.2) and
redhat 9 (python 2.2).

:r daniel.py
import thread, Queue, os
l = []
q = Queue.Queue(10)

def enqueue():
    os.system("ps mT")
    q.put(thread.get_ident())

for i in range(10):
    thread.start_new(enqueue, ())

for i in range(10):
    print q.get()

os.system("ps mT")

This suggests that the problem may be architecture-specific,
thread-library specific, or it may be due to some difference between
the normal python executable and the executable with embedded Python.

Jeff



From g.marshall at nospam.com  Fri Jan  9 10:49:26 2004
From: g.marshall at nospam.com (George Marshall)
Date: Fri, 09 Jan 2004 15:49:26 GMT
Subject: Program return value ?
Message-ID: <a4ALb.238706$vO5.9820692@twister1.libero.it>

Hi all, I'm trying to get the exit code of a program
I want to exec in a python script in a portable manner.

I've read that both os.system and os.spawnl are not a
portable solution.

I tried the os.popen() function and I got the program's exit
code with the close() method.

p=os.popen("return_a_exit_code.sh")
retval=p.close()

The only problem is that it doesn't return negative values.

What is your experience with that ?

Thanks in advance.



From kahanpaa at gstar.astro.helsinki.fi  Mon Jan 12 15:42:17 2004
From: kahanpaa at gstar.astro.helsinki.fi (Jere Kahanpaa)
Date: 12 Jan 2004 20:42:17 GMT
Subject: Python installation breaks Outlook Express
References: <t2k3001mc170t3vdkk7f0mftcjlptkdo6a@4ax.com>
Message-ID: <btv0r9$75f$1@oravannahka.helsinki.fi>

Hi.

M. Laymon <mxlaym009 at nospam_hotmail.com> wrote:
> Your server has unexpectedly terminated the connection. Possible
> causes for 
> this include server problems, network problems, or a long period of
> inactivity. 
> Account: 'incoming.verizon.net', Server: 'outgoing.verizon.net', 
> Protocol: SMTP, Port: 25, Secure(SSL): No, Error Number: 0x800CCC0F

Python is not the source of your problem. The Verizon servers had some 
problems (they should now be OK, i think): due to an obscure 
misconfiguration they managed to make flood their own servers with 
requests - an auto-DOS of sorts.

Jere
-- 
Lord, make my words as sweet as honey, for one day I may have to eat them
                                                           - Daryl Benson


From gerrit at nl.linux.org  Fri Jan 23 11:50:24 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Fri, 23 Jan 2004 17:50:24 +0100
Subject: C compilers
In-Reply-To: <X59Qb.20838$q4.11416@newsread3.news.atl.earthlink.net>
References: <X59Qb.20838$q4.11416@newsread3.news.atl.earthlink.net>
Message-ID: <20040123165024.GA4137@nl.linux.org>

Lucas Raab wrote:
> I realize that this is a Python newsgroup, but do any of you know any good
> C/C++ compilers??

yes



From aahz at pythoncraft.com  Wed Jan 21 19:34:41 2004
From: aahz at pythoncraft.com (Aahz)
Date: 21 Jan 2004 19:34:41 -0500
Subject: Do (USA) Python conferences require a coast?
References: <6b50e1-goo.ln1@jowls.lairds.org>
Message-ID: <bun5r1$db1$1@panix1.panix.com>

In article <6b50e1-goo.ln1 at jowls.lairds.org>,
Kyler Laird  <Kyler at news.Lairds.org> wrote:
>
>It looks like PyCon
>	http://pycon.org/
>is always in Washington, DC.  I try to avoid DC.

It's kind of hard to say "always" about a conference that hasn't had its
second iteration yet.  ;-)

>Python10
>	http://www.python10.org/
>is also essentially in DC (Alexandria, VA).

"Is"?  That was two years ago.  The "formal" Python conference is now
associated with OSCON, which does tend to be on the west coast.

There's absolutely no reason why someone couldn't organize a PyCon
somewhere other than D.C. -- that's specifically why it's called "DC
2004" and why we called the last one "DC 2003".  However, it's not clear
how much of a market there is for additional PyCons; given that the
change to PyCon/OSCON is only a year old, and given that the economy
hasn't fully recovered, you might want to plan your event for sometime in
2005.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

A: No.
Q: Is top-posting okay?


From bart_nessux at hotmail.com  Sat Jan 24 16:25:01 2004
From: bart_nessux at hotmail.com (Bart Nessux)
Date: Sat, 24 Jan 2004 16:25:01 -0500
Subject: time.time()
In-Reply-To: <7cf510d1k3ug79am8s709ebhar2sspjlm2@4ax.com>
References: <buubug$rcj$1@solaris.cc.vt.edu>
	<7cf510d1k3ug79am8s709ebhar2sspjlm2@4ax.com>
Message-ID: <buunre$ffe$1@solaris.cc.vt.edu>

Terry Carroll wrote:

> It sounds like you're thinking time.time() does something else, which
> you're trying to do.  What is that?  There might be another function for
> you.

I should have been more clear... here's the code:

x = time.time()
fp = os.popen("some_process", "r")
fp.read()
fp.close()
print (time.time()-x/60)/60

If fp runs for many hours (in my case it does), I want time.time() to 
return the time it runs in seconds which I would then divide by 60 to 
get the total amount of minutes which I would then divide by 60 to get 
the total amount of hours that the process has ran... does that make 
sense? I don't need to be super precise, just within 1 minute or so of 
the actual amount of time that the process required to run.



From gagenellina at softlab.com.ar  Mon Jan  5 18:31:43 2004
From: gagenellina at softlab.com.ar (Gabriel Genellina)
Date: Mon, 05 Jan 2004 20:31:43 -0300
Subject: datetime string to datetime object converter
In-Reply-To: <MnIJb.33778$xU1.16252@fe1.texas.rr.com>
Message-ID: <5.2.1.1.0.20040105202350.01e69770@192.168.0.115>

At 3/1/2004 23:38, you wrote:

>Is there an existing module or script that can convert a datetime string 
>of unknown format to a python datetime object ?

If the format is really unknown the data is ambiguous.
04/03/02 might be April 3rd 2002, March 4th 2002 or even March 2nd 2004; 
12-11-2004 might represent two different dates.


Gabriel Genellina
Softlab SRL




From cpl.19.ghum at spamgourmet.com  Mon Jan 26 10:26:56 2004
From: cpl.19.ghum at spamgourmet.com (Harald Massa)
Date: Mon, 26 Jan 2004 16:26:56 +0100
Subject: Py2exe and WMI module
References: <697d8a6c.0401260516.40e51096@posting.google.com>
Message-ID: <Xns947CA8B13DD8Ecpl19ghumspamgourmet@62.153.159.134>

Hello Olav,

> I have run makepy manually on one all of the above libraries. 

> Microsoft WMI Scripting Library
> WMI ADSI Extension Type Library
> WMICntl Type Library
> 

> Traceback (most recent call last):
>   File "test-fail.py", line 1, in ?
>     import wmi
>   File "wmi.pyc", line 132, in ?
>   File "win32com\client\gencache.pyc", line 527, in EnsureDispatch
>   File "win32com\client\CLSIDToClass.pyc", line 50, in GetClass
> KeyError: '{D2F68443-85DC-427E-91D8-366554CC754C}'
 

Look at:
http://starship.python.net/crew/theller/moin.cgi/Py2Exe

With py2exe 0.5.0 there is an example with WMI (I think it's the 
"advanced" one)

Also there are some troubles with the name of the zip-file and win32all.

Furthermore 0.5.0 got big improvements handlign win32com -Stuff. 

There is also a "typelib"-directive in 0.5.0, so maybe you can force the 
inclusion of typelib {D2F68443-85DC-427E-91D8-366554CC754C}

HTH

Harald


From robin at jessikat.fsnet.co.uk  Mon Jan 12 19:50:58 2004
From: robin at jessikat.fsnet.co.uk (Robin Becker)
Date: Tue, 13 Jan 2004 00:50:58 +0000
Subject: Python is far from a top performer according to benchmarktest...
References: <ZGsHWLAELyAAFw4h@jessikat.fsnet.co.uk>
	<mailman.310.1073949030.12720.python-list@python.org>
Message-ID: <WgRkPUAyD0AAFwa2@jessikat.fsnet.co.uk>

In article <mailman.310.1073949030.12720.python-list at python.org>, Tim
Peters <tim.one at comcast.net> writes
.......
>That's the magic of Fortran:  the F77 standard says (in part):
>
>    If a subprogram reference causes a dummy argument in the
>    referenced subprogram to become associated with another
>    dummy argument in the referenced subprogram, neither
>    dummy argument may become defined during execution of
>    that subprogram.
>
>It bascially says you can alias all you want, so long as you only read the
>aliased entities and don't modify them.  If effect, if you do anything with
>aliases that would inhibit optimizations that assume there isn't any
>aliasing, then it's your *program* that's not legitimate Fortran.  The
>Fortran standard has lots of text "like that", imposing (often unenforcable)
>restrictions on conforming programs for the benefit of optimizing compilers.
>That was the right choice for Fortran's audience.
>

this was also my understanding, the difficulty is that humans can't do
the correct analysis in their heads for all, but the most simple
programs. I seem to remember that almost all the compilers I used had
mechanisms for turning off the most aggressive optimisations so if the
card deck suddenly started working with them off then you could try and
figure out what was wrong. Another nastiness was that by putting prints
in you often disrupted the optimisations and the values you got printed
seemed to indicate everything was fine.
-Common blocks are an invention of the Devil-ly yrs- 
Robin Becker


From mcfletch at rogers.com  Thu Jan 29 05:18:21 2004
From: mcfletch at rogers.com (Mike C. Fletcher)
Date: Thu, 29 Jan 2004 05:18:21 -0500
Subject: C API: how to tell if x is a new style instance?
In-Reply-To: <20040129095050.GA27902@foof.i3.cz>
References: <20040128184040.GD11485@foof.i3.cz> <401821E2.1070106@rogers.com>
	<20040129095050.GA27902@foof.i3.cz>
Message-ID: <4018DDED.2010506@rogers.com>

Michal Vitecek wrote:

>Mike C. Fletcher wrote:
>  
>
>>Well, I don't actually know how to check for the spiritual state of a 
>>new-style class, but here's how to tell if an instance is an instance of 
>>a new-style class:
>>
>>  * Note that a new-style class is a sub-class of type, while
>>    old-style classes are not
>>    
>>
Ignore this, it's wrong.  Should have read: Note that a new-style class 
is an *instance* of a sub-class of type, while old-style classes are not.

>>  * Check if isinstance( instance.__class__, type )
>>    
>>
If the above had been true this would have read issubclass( ... ), trust 
the code more than the descriptions :) .

>>  * <Insert mystical spiritual damnedness check here>
>>    
>>
>
> ahh - it helped. thank you!
> 
> but, so it means that PyType_Check() doesn't work for new style
> classes' instances? it returns 0 but i understood from the
> documentation that it should return 1:
>  
>
Nope, I'm just an idiot :) .  The code was saying what I intended, but 
not the text.  The docs you're reading are saying "if it's an instance 
of the meta-class type, or a sub-class of the meta-class type"... to 
illustrate:

 >>> class r( type ):
...     pass
...
 >>> class s:
...     __metaclass__ = r
...    
 >>> s
<class '__main__.s'>
 >>> s.__class__
<class '__main__.r'>
 >>> isinstance( s, type )
1
 >>> isinstance( s(), type )
0

You wouldn't want instances of s claiming to be types.  But instances of 
r, (which is a sub-class of type), should claim to be types (s is an 
instance of r).

Hope that resolves any confusion,
Mike

> """
> int PyType_Check(PyObject *o)
>     Returns true if the object o is a type object, including instances
>     of types derived from the standard type object. Returns false in
>     all other cases.
> """
>  
>
_______________________________________
  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://members.rogers.com/mcfletch/





From oren-py-l at hishome.net  Fri Jan 16 15:40:51 2004
From: oren-py-l at hishome.net (Oren Tirosh)
Date: Fri, 16 Jan 2004 15:40:51 -0500
Subject: I come not to bury C++, but to praise it...
In-Reply-To: <20040114153516.GA16224@intarweb.us>
References: <mailman.337.1074032524.12720.python-list@python.org>
	<bu1uul$cam92$1@ID-46268.news.uni-berlin.de>
	<cu%Mb.47396$8H.99443@attbi_s03>
	<bu3khe$dbm5v$1@ID-46268.news.uni-berlin.de>
	<20040114153516.GA16224@intarweb.us>
Message-ID: <20040116204051.GB36773@hishome.net>

On Wed, Jan 14, 2004 at 10:35:16AM -0500, Jp Calderone wrote:
> On Wed, Jan 14, 2004 at 09:42:52AM -0500, Derek wrote:
> > [snip]
> > 
> > I also use C++ and Python as my main languages and I agree with your
> > comments.  However, I don't agree that Python is inherently "safer"
> > than C++.  At best I see it as a tie.  For example, C++ let's you
> > corrupt memory among other "unsafe" things, most of which can be
> > avoided by using standard containers, smart pointers, etc.  Python
> > lets you do "unsafe" things such as passing an object to a function
> > when it makes no sense to do so, which can lead to nasty runtime
> > surprises.
> > 
> 
>   A traceback is *much* less nasty than memory corruption.  

A traceback is also much less nasty than deciphering a 1000-character 
long compiler error message reported in code that uses a heavily 
templated library.

   Oren



From jjl at pobox.com  Mon Jan 19 08:26:51 2004
From: jjl at pobox.com (John J. Lee)
Date: 19 Jan 2004 13:26:51 +0000
Subject: secure unpickle?
References: <bufkot$96vl$1@netnews.upenn.edu>
	<mailman.497.1074496021.12720.python-list@python.org>
Message-ID: <871xpwxe5g.fsf@pobox.com>

Gandalf <gandalf at geochemsource.com> writes:
[...]
> I'm using this module (based on the documentation you mentioned):
[...snip...]

What does this have to do with the question?  He was worried about
security of pickle, not asking how to call dumps() and loads().


John


From fisher at energy.uch.net  Tue Jan 27 04:56:55 2004
From: fisher at energy.uch.net (Serge A. Ribalchenko)
Date: Tue, 27 Jan 2004 11:56:55 +0200
Subject: TELNET instead PING
In-Reply-To: <mailman.807.1075148925.12720.python-list@python.org>
References: <5f505344.0401260332.184d4225@posting.google.com>
	<401571B9.F9DF99D0@engcorp.com>
	<mailman.807.1075148925.12720.python-list@python.org>
Message-ID: <tec5vb.40b.ln@energy.uch.net>

Gandalf wrote:


> Note: that reason you talked about is most likely a packet filtering 
> firewall. A good firewall
> can block PING, Telnet, Nbsession and many others. In most cases, the 
> best policy
> is to lock everything by default and permit only the ones you really 
> want. Firewall
> rules can include source addresses too. It is possible that a computer 
> do not respond
> on PING and TELNET ports for you but it does for a similar request from 
> another
> computer. I think there is no universal way to determine if a remote 
> host is alive or not.

If we are talking about IP network segment in the same ethernet layer, 
can you ignore my ARP request - who-has <your-ip> ?




From elainejackson7355 at home.com  Sat Jan 10 02:38:31 2004
From: elainejackson7355 at home.com (Elaine Jackson)
Date: Sat, 10 Jan 2004 07:38:31 GMT
Subject: end of a pickle file
Message-ID: <XZNLb.42329$JQ1.32480@pd7tw1no>

How can I tell when I've gotten to the end of a pickle file? TIA

Peace




From paul at fxtech.com  Thu Jan 22 17:52:07 2004
From: paul at fxtech.com (Paul Miller)
Date: Thu, 22 Jan 2004 16:52:07 -0600
Subject: Looking for advice: supporting multiple embedded interpreters
In-Reply-To: <uad4fke9o.fsf@fitlinxx.com>
References: <mailman.646.1074782778.12720.python-list@python.org>
	<uad4fke9o.fsf@fitlinxx.com>
Message-ID: <6.0.1.1.2.20040122165118.060feec0@mail.fxtech.com>


>I can't address why it doesn't work in 2.3, but just a question - have
>you thought of not using independent interpreter states, but just
>tracking the contents of sys.modules and clearing out any new modules
>at reload time?  That would force even nested imports to be reloaded.

Hmm - although not as "clean" as having multiple interpreters (since 
globals would still be visible between modules), it WOULD get around the 
more pervasive problem, which was the reloading. I'll take a look at this.

THANKS!





From james at logicalprogression.net  Thu Jan 15 05:46:32 2004
From: james at logicalprogression.net (James Henderson)
Date: Thu, 15 Jan 2004 10:46:32 +0000
Subject: is it possible to create a win binary file from .py files ?
In-Reply-To: <200401151125.04886.sancelot@free.fr>
References: <200401151125.04886.sancelot@free.fr>
Message-ID: <200401151046.32630.james@logicalprogression.net>

On Thursday 15 January 2004 10:25 am, stephane ancelot wrote:
> Hi,
> I am new to python and I would like to know if there are some ways to
> provide a binary file as target . Because my projects may contain lot of py
> files and I do not want to provide source files . for maintenance puproses
> it is too easier for me to send only one file to my customer.
>
> Best Regards
> Steph

Try the freeze tool that comes in the Python distribution.  I can't say where 
you will find it exactly because that depends on you platform but there 
should be a directory somewhere called Tools.

An alternative that does not reduce the number of files but does hide the 
source is to distribute .pyc files.  These are created when you import a 
module, or you can use the compileall module.  Note that this is not a real 
security measure since such files can be disassembled.

James



From jcarlson at uci.edu  Tue Jan 20 02:23:12 2004
From: jcarlson at uci.edu (Josiah Carlson)
Date: Mon, 19 Jan 2004 23:23:12 -0800
Subject: speedy Python strings?
References: <buhtjb$ida$1@news.rz.uni-karlsruhe.de>
	<roy-96DC3A.20024419012004@reader2.panix.com>
	<20040119185543.ABC7.JCARLSON@uci.edu>
	<400cc8c4$0$26115$afc38c87@news.optusnet.com.au>
Message-ID: <20040119231427.D6BC.JCARLSON@uci.edu>

> Note that there's been some very interesting discussions on python-dev
> recently that may end up alleviating this issue somewhat in the future - but
> no promises - there doesn't appear to be a consensus on the "right way" ...

I've been following it.  My favorite solution is to not change the
structure of the list at all, and to offer a reasonably fast fifo queue
in a standard library module with a bunch of other useful data
structures.  Then you don't need to worry about breaking C modules that
rely on the list having that behavior, and get some useful data
structures out of the deal.

 - Josiah



From mgoogle at deferran.com  Wed Jan 28 04:21:49 2004
From: mgoogle at deferran.com (Manuel de Ferran)
Date: 28 Jan 2004 01:21:49 -0800
Subject: pexpect exceptions
References: <pan.2004.01.26.22.07.43.147063@laframboise.net>
Message-ID: <c3a209a.0401280121.4fcf9798@posting.google.com>

Michael Surette <msurette at laframboise.net> wrote in message news:<pan.2004.01.26.22.07.43.147063 at laframboise.net>...
> I have been trying to automate the changing of passwords using python and
> pexpect.  I wrote a script as a test and it works, except that it gives me
> an exception when it stops running:
> 
> Exception exceptions.OSError: 
> (10, 'No child processes') in <bound method spawn.__del__ of
> <pexpect.spawn instance at 0x403d938c>> ignored
> 
> What is happening and how do I get rid of the exception?
> 
> I am running python 2.3.2 under Slackware linux 9.1 and pexpect 0.99. 
> Here is the script:
> 
> #!/usr/bin/python
> import pexpect
> import sys
> 
> if len(sys.argv) != 3:
>   print 'usage error!'
>   raise SystemExit
> 
> name= sys.argv[1]
> passwd= sys.argv[2]
> 
> a= pexpect.spawn('passwd %s'%name)
> 
> changed= False
> while not changed:
>   i= a.expect(['[Nn]ew password:','[Cc]hanged'])
>   if i == 0:
>     a.sendline(passwd)
>   elif i == 1:
>     changed= True

I have the same issue with the following code :
#!/usr/bin/env python
'''This runs "ls -l" on a remote host using SSH.
    At the prompts enter hostname, user, and password.
'''
import pexpect
import getpass

host = raw_input('Hostname: ')
user = raw_input('User: ')
password = getpass.getpass('Password: ')

child = pexpect.spawn("ssh -l %s %s /bin/ls -l"%(user, host))

child.expect('password:')
child.sendline(password)

child.expect(pexpect.EOF)
print child.pid,'middle',child.isalive()

print child.before

This is a slighty modified version of sshls.py (shipped with
pexpect-examples). I've only added "print
child.pid,'middle',child.isalive()"
and I get the same exception : "exceptions.OSError: (10, 'No child
processes')"

The weird thing I can't explain is that, I don't get the exception
without ",child.alive()"


From skip at pobox.com  Wed Jan 28 10:11:03 2004
From: skip at pobox.com (Skip Montanaro)
Date: Wed, 28 Jan 2004 09:11:03 -0600
Subject: type() for new style classes - buggy?
In-Reply-To: <20040128130204.GA10744@foof.i3.cz>
References: <20040128130204.GA10744@foof.i3.cz>
Message-ID: <16407.53511.625104.948357@montanaro.dyndns.org>


    Michal>  does the type() command work correctly for new style classes?

Yes.  Using 2.2:

    >>> class A(object): pass
    ... 
    >>> type(A)
    <type 'type'>
    >>> type(A())
    <class '__main__.A'>
    >>> isinstance(A(), A)
    1

Using 2.3 or newer:

    >>> class A(object):
    ...   pass
    ... 
    >>> type(A)
    <type 'type'>
    >>> type(A())
    <class '__main__.A'>
    >>> isinstance(A(), A)
    True

In general, you shouldn't be using the types module, certainly not for
new-style classes.

Skip



From no at spam.invalid  Fri Jan 16 18:32:57 2004
From: no at spam.invalid (Russell E. Owen)
Date: Fri, 16 Jan 2004 15:32:57 -0800
Subject: [Ann] RO utility package 2004-01-16
Message-ID: <bu9sbb$bje$1@nntp6.u.washington.edu>

I've put up a new version of my RO utility package at 
<http://www.astro.washington.edu/owen/ROPython.html>. Highlights include:

Tkinter stuff, including:
- Nicely wrapped tcp/ip sockets that make connections without blocking 
the main loop, queue written data as required, return read data via 
callbacks and also report status changes via callbacks.
- An ftp get widget (like a browser transfer window) that handles file 
transfer and status display. Connection and transfer occurs in a 
background thread and so cannot block the main loop.
- Widgets that support help and input verification
- A scrollable frame.
- A set of Toplevels that can remember and restore location and size and 
whether each was visible.
- An implementation of preferences, including scalars, colors, fonts, 
files, directories and sound files. This includes a prefs editor and 
saving and restoring.

Astronomy coordinate system conversions. (Many of these are SLALIB 
routines that I converted to Python. Commercial use requires a license 
from Pat Wallace, the author of SLALIB).

Basic utilities for sequences, strings and data conversion.

Dict subclasses that remember the order in which items were added or 
store values by appending to a list.

A key-value parsing and dispatching system which could be useful for a 
networked GUI (that's what I use it for).

A telescope user interface I am writing relies on them, so they are 
being maintained. I hope somebody finds them useful.

-- Russell


From No.Spam.mc at No.Spam.mclaveau.No.Spam.com  Fri Jan 30 17:19:51 2004
From: No.Spam.mc at No.Spam.mclaveau.No.Spam.com (Michel Claveau/Hamster)
Date: Fri, 30 Jan 2004 23:19:51 +0100
Subject: python in dreamweaver
References: <d99e1341.0401271818.625d5ef2@posting.google.com>
	<bv86nc$rto$2@news-reader4.wanadoo.fr>
	<d99e1341.0401291857.6deabb3d@posting.google.com>
Message-ID: <bvem9h$j3a$1@news-reader5.wanadoo.fr>

Hi !

I prepare "template" pages with DM ; in "strategic" position (where i think
put infos later), i put a key-word ; then i save the page.
My web-server (in Python) read the HTML-Page, do multiple search/replace
(key-words by data), then send the page.


* sorry for my bad english *


Michel Claveau




From fumanchu at amor.org  Tue Jan  6 17:51:44 2004
From: fumanchu at amor.org (Robert Brewer)
Date: Tue, 6 Jan 2004 14:51:44 -0800
Subject: help needed with class and method confusion
Message-ID: <DE1CF2B4FEC4A342BF62B6B2B334601E561BCC@opus.amorhq.net>

EricN wrote:
> Here's one way to do it (undoubtedly there are other ways as well). 
> Sorry, I couldn't loop the moons.  Probably a programmer more clever
> than I could write a factory pattern for it.
> 
> class Moon:
>     def __init__(self, name, diameter = 0.0, planet = "unknown"):
>         self.NAME = name
>         self.DIAMETER = diameter
>         self.HOMEPLANET = planet
> 
>     def setMoonName(self, name):
>         self.NAME = str(name)
> 
>     def getMoonName(self):
>         return self.NAME
> 
>     def setMoonDiameter(self, diam):
>         self.DIAMETER = float(diam)
> 
>     def getMoonDiameter(self):
>         return self.DIAMETER
> 
>     def setMoonHomePlanet(self, planet):
>         self.HOMEPLANET = str(planet)
> 
>     def getMoonHomePlanet(self):
>         return self.HOMEPLANET
> 
> 
> if __name__ == "__main__":
>     moons = []
>     Io = Moon("Io", 1.0, "Jupiter")
>     moons.append(Io)
>     Europa = Moon("Europa", 2.0, "Jupiter")
>     moons.append(Europa)
>     Ganymeade = Moon("Ganymeade", 3.0, "Jupiter")
>     moons.append(Ganymeade)
>     Titan = Moon("Titan", 3.0, "Saturn")
>     moons.append(Titan)
>     
>     for x in range(len(moons)):
>         print moons[x].getMoonName()
>         print moons[x].getMoonDiameter()
>         print moons[x].getMoonHomePlanet()
>         print

Wow. Someone's spent too much time writing Java. You can achieve the
same thing with far less cruft:

class Moon:
    def __init__(self, name, diameter = 0.0, planet = "unknown"):
        self.name = name
        self.diameter = diameter
        self.homeplanet = planet

if __name__ == "__main__":
    moons = [Moon("Io", 1.0, "Jupiter"),
             Moon("Europa", 2.0, "Jupiter"),
             Moon("Ganymeade", 3.0, "Jupiter"),
             Moon("Titan", 3.0, "Saturn"),
             ]
    
    for moon in moons:
        print moon.name
        print moon.diameter
        print moon.homeplanet

The biggest two changes stemming from the questions:
1) Why bother with all the setX/getX junk?

and

2) Why bother with variable names for each moon? Treat them anonymously.


FuManChu



From lord_turc at yahoo.com  Fri Jan 30 13:27:45 2004
From: lord_turc at yahoo.com (M.Dikmen)
Date: Fri, 30 Jan 2004 18:27:45 -0000
Subject: Tcp/ip programs in python
Message-ID: <bve7n1+b7ud@eGroups.com>

Do you now a source about socket programming in python? or some source
codes, demo programs? i really need them




From no.spam  Sun Jan 18 13:21:18 2004
From: no.spam (Christophe Delord)
Date: Sun, 18 Jan 2004 19:21:18 +0100
Subject: re question - finiding matching ()
References: <4f0a9fdb.0401180751.4b66d974@posting.google.com>
Message-ID: <20040118192118.61fea23f.no.spam@box>

On 18 Jan 2004 07:51:38 -0800, Miki Tebeka wrote:

> Hello All,
> 
> To all of you regexp gurus out there...
> 
> I'd like to find all of the sub strings in the form "add(.*)"
> The catch is that I might have () in the string (e.g. "add((2 * 2),
> 100)"), 
> 
> Currently I can only get the "addr((2 *2)" using
> re.compile("\w+\([^\)]*\)"). To solve the problem a hand crafted
> search is used :-(
> 
> Is there a better way?
> 
> Thanks.
> Miki


Hello,

You may need "recursive patterns" to do this but regular expressions
cannot handle this. You can simulate recursive pattern by limiting the
recursivity level. For example the expression inside () should be
[^\(\)]+ at level 0. At level 1, you can match only zero or one pair:
(?:\([^\(\)]+\)|[^\(\)]+)* and so on.

You can build such an expression recursively:

def make_par_re(level=6):
    if level < 1:
        return r'[^\(\)]+'
    else:
        return r'(?:\(%s\)|%s)*'%(make_par_re(level-1), make_par_re(0))

par_re = re.compile(r"\w+\(%s\)"%make_par_re())

But in this case you are limited to 6 levels.

Now you can try this :

for m in par_re.findall("add((2*2), 100)  some text sub(a, b*(10-c),
f(g(a,b), h(c, d)))"):
    print m

I don't really like this solution because the expressions are ugly (try
print make_par_re(6)).

Anyway a better solution would be to use a syntactic parser. You can
write your own by hand or make your choice here:
http://www.python.org/sigs/parser-sig/



Best regards,
Christophe.


From tjreedy at udel.edu  Fri Jan 16 15:46:52 2004
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 16 Jan 2004 15:46:52 -0500
Subject: Why gmp is not in the standard library?
References: <4f0a9fdb.0401150211.615a7f45@posting.google.com>
	<m3hdyxv1mp.fsf@pc150.maths.bris.ac.uk>
	<4006b54e$0$560$b45e6eb0@senator-bedfellow.mit.edu>
	<mailman.400.1074182344.12720.python-list@python.org>
	<4006f74a$0$567$b45e6eb0@senator-bedfellow.mit.edu>
	<87smif64o3.fsf@pobox.com>
Message-ID: <I6Odne1Ecdgs0JXdRVn-iQ@comcast.com>


> > That being said, wasn't there some issue with making the Python
> > License GPL compatible for issues like these?

> "GPL-compatible" is very different from "GPL", of course.

I 'believe' that GPL-compatible means that someone can mix (compile) Python
with GPL code and release the mixture -- as a GPL bundle, which the PSF
does not want to do with Python itself but which repackagers are free to
do.  It does not mean that PSF can put GPL code into the core and still
release Python with *its* non-GPL license.

tjr




From syver-en+usenet at online.no  Thu Jan  8 10:22:06 2004
From: syver-en+usenet at online.no (Syver Enstad)
Date: 08 Jan 2004 16:22:06 +0100
Subject: PRE-PEP: new Path class
References: <1073567709.3ffd57dda8cb0@mcherm.com>
	<mailman.187.1073568366.12720.python-list@python.org>
	<3FFD72BD.780554D8@engcorp.com>
Message-ID: <ulloio481.fsf@online.no>

Peter Hansen <peter at engcorp.com> writes:

> I haven't been following (either discussion) closely, but this
> sounds similar to some posts I read about a discussing involved a
> .reverse() method, and the apparent conclusion that .reversed()
> [note the 'd'] was more appropriate as it didn't imply that the
> object was being modified in-place, but that it was returning a
> reversed version of itself.  Same thing could apply here...

Good point, but what about asNormalized() or asReversed()? Or
as_reversed() or as_normalized() if that is the coding
convention. Doesn't that communicate the intent even better?



-- 

Syver Enstad


From michael at foord.net  Tue Jan 20 03:31:59 2004
From: michael at foord.net (Fuzzyman)
Date: 20 Jan 2004 00:31:59 -0800
Subject: Tk Icon - request to Fredrik Lundh
References: <8089854e.0401190436.10f99713@posting.google.com>
	<bugqir$lds$1@news-reader2.wanadoo.fr>
Message-ID: <8089854e.0401200031.445728d9@posting.google.com>

Eric Brunel <eric.brunel at N0SP4M.com> wrote in message news:<bugqir$lds$1 at news-reader2.wanadoo.fr>...
> Fuzzyman wrote:
> > There is a very interesting (and potentially useful) program on the
> > effbot website - called Tkicon.
> > 
> > http://www.effbot.org/downloads/
> > 
> > Unfortuantely the last supported version of python is 2.1
> > I've seen a few people asking, but never an answer, on Python 2.3
> > support.
> 
> This utility should not be needed anymore if you're using a recent version of 
> tcl/tk: the method wm_iconbitmap on toplevel's, that didn't work on earlier 
> versions of tk on Windows, now works without problem. You should specifiy a .ico 
> or .icr file name as its argument. See the documentation for the corresponding 
> tk command at:
> http://www.tcl.tk/man/tcl8.3/TkCmd/wm.htm#M15
> 

Hmmm..... reading the documentation makes things less clear :-)

How about :

test = tkinter.Toplevel(wm_iconbitmap='test.ico') 
???? I'll try that ;-)
Anyway - thanks for the help - once I work out the proper Tkinter
format then I'm sure it will work.........

Fuzzy

> HTH


From miki.tebeka at zoran.com  Sun Jan  4 03:44:39 2004
From: miki.tebeka at zoran.com (Miki Tebeka)
Date: 4 Jan 2004 00:44:39 -0800
Subject: Parametrized inheritance
References: <PSJJb.214440$8y1.768918@attbi_s52>
Message-ID: <4f0a9fdb.0401040044.592a0695@posting.google.com>

Hello Dan,

> i.e. define Sub as "class Sub(X)", where I can change X at the time of
> instantiation.  Then I could define MySub as "class MySub(Sub(MyBase))".
> (I hope that it's obvious that I'm looking for this effect, not this syntax)
>>> class Woof:
	def say(self):
		print "woof"

		
>>> class AlsoWoof:
	pass

>>> a = AlsoWoof()
>>> a.say()

Traceback (most recent call last):
  File "<pyshell#75>", line 1, in -toplevel-
    a.say()
AttributeError: AlsoWoof instance has no attribute 'say'
>>> AlsoWoof.__bases__ += (Woof,)
>>> a = AlsoWoof()
>>> a.say()
woof
>>> 

> Of course, someone is going to ask "why?"
> I need to override a few members in Base.  Sub is mostly fine as-is, so if I
> could have MySub=Sub(MyMBase), that would be fine.
Why don't just override them in the subclass as usuall?
>>> class Base:
	def f(self):
		print "base"

		
>>> class Sub(Base):
	def f(self):
		print "sub"

		
>>> s = Sub()
>>> s.f()
sub

HTH.
Miki


From irmen at -NOSPAM-REMOVETHIS-xs4all.nl  Wed Jan 14 17:29:00 2004
From: irmen at -NOSPAM-REMOVETHIS-xs4all.nl (Irmen de Jong)
Date: Wed, 14 Jan 2004 23:29:00 +0100
Subject: Problems creating mail content using email.MIMEText,
	non-ASCII encoding
Message-ID: <4005c2ab$0$321$e4fe514c@news.xs4all.nl>

Hi
I'm trying to create e-mail content using the email.MIMEText module.
It basically works, until I tried to send mail in non-ascii format.

What I did, to test both iso-8859-15 and UTF-8 encodings, was this:

----
from email.MIMEText import MIMEText
m=MIMEText(u"body text including an Euro char \u20ac\n", _charset="iso-8859-15")
m['From'] = "from at mail.invalid"
m['To'] = "to at mail.invalid"
m['Subject'] = "iso 8859-15 encoding?"
print "FIRST MAIL: [[[%s]]]" % m.as_string()

m=MIMEText(u"body text including an Euro char \u20ac\n", _charset="UTF-8")
m['From'] = "from at mail.invalid"
m['To'] = "to at mail.invalid"
m['Subject'] = "UTF-8 encoding?"
print "SECOND MAIL: [[[%s]]]" % m.as_string()
----

But that doesn't work. The output is (using Python 2.3.3):

-----
[E:\temp]python mail.py
FIRST MAIL: [[[Content-Type: text/plain; charset="iso-8859-15"
MIME-Version: 1.0
Content-Transfer-Encoding: quoted-printable
From: from at mail.invalid
To: to at mail.invalid
Subject: iso 8859-15 encoding?

body text including an Euro char =20AC
]]]
Traceback (most recent call last):
   File "mail.py", line 12, in ?
     print "SECOND MAIL: [[[%s]]]" % m.as_string()
......snipped.........
   File "C:\Python23\lib\email\base64MIME.py", line 148, in encode
     enc = b2a_base64(s[i:i + max_unencoded])
UnicodeEncodeError: 'ascii' codec can't encode character u'\u20ac' in position 
33: ordinal not in range(128)
-----


The first one in iso-8859-15 format looks okay but is in quoted-printable,
and either my mail clients are wrong (unlikely, I've never had this kind
of problems with them) or the content is wrong, because what
I'm seeing this in Mozilla mail and my webmail client:
    "body text including an Euro char  AC"         (a space before 'AC'!)

My UTF-8 attempt failed totally as you can see.

What am I doing wrong?

I'm thinking about ditching email.MIMEText and just create the mail
body text myself using regular unicode --> UTF-8 encoding, but then
I lose the automatic header creation and some more handy things of
email.MimeText...

Thanks for help
--Irmen de Jong.


From tim.one at comcast.net  Mon Jan 12 13:19:09 2004
From: tim.one at comcast.net (Tim Peters)
Date: Mon, 12 Jan 2004 13:19:09 -0500
Subject: Databases: Which one's right for me?
In-Reply-To: <4002D8CC.4060701@reportlab.com>
Message-ID: <LNBBLJKPBEHFEDALKOLCKEBFIFAB.tim.one@comcast.net>

[Aaron Watters]
> re: jeremy's reply...
>
> I find the Gray and Reuter definition confusing.  To my mind
> isolation means serializability and if you don't have serializability
> (at least as an option) you don't have isolation.

Gray and Reuter's "It appears that the system runs one transaction at a
time" can be read as implying serializability.  Or not.  Informal English
isn't good for this.

> Transactions don't have to be complex to cause serious problems in
> read-committed mode:  the classic example is a debit of $1000 for
> checking account 123 running at the same time as a credit for $4000
> for checking account 123.  If both transactions run at the same time
> and read the same previous (committed) balance and they both
> complete but the first one completes last then the customer is
> screwed to the tune of $4000.

This one isn't a problem in ZODB.  The second transaction that tries to
commit will fail, with a ConflictError exception.  It's up to the
application then to either abort the failed transaction, or retry it.

If this is a commonly expected kind of conflict, it's also possible for the
object implementing the notion of "checking account" to provide a conflict
resolution method.  Then instead of raising ConflictError, ZODB will call
that method with 3 things:  the object state as of the time the transaction
began, the object state the transaction is trying to commit, and the object
state currently committed.  If the method believes it can  compute a correct
new state from those three, it can return that, and that new state will be
committed instead.  Or it can give up, letting the ConflictError occur.

In this case, a suitable conflict resolution method could compute the delta
between the balance as of the time the transaction began, and the balance
currently committed, then add that delta to the balance it was trying to
commit, and return the result as the balance it "really wants" to commit.

> This is only the simplist problem -- for transactions involving
> complex data structures the problems can be much more subtle than
> that (and more difficult to correct).

ZODB's BTrees are probably a good example of that.  They resolve some
conflicts on their own (for example, two transactions add distinct keys to
the same bucket -- then their conflict resolution method returns a bucket
with both keys), but punt on others (for example, like before, except the
bucket splits -- then changes to the bucket's parent node are also involved,
and bucket conflict resolution gives up, letting the ConflictError
propagate).

I'm not claiming there's no case in which ZODB can yield an "incorrect"
database state.  For example, it *may* be that when two transactions add
distinct new keys to a BTree, one of the transactions did so only because it
didn't see the other key in the BTree, and then a final BTree state
containing both keys would be incorrect.  What the BTree conflict resolution
code does is correct for all uses of BTrees made by Zope, though.

BTW, there's nothing in ZOBD that *requires* you to run concurrent
transactions.  If you need them to act always and in all conceivable
respects as if one were run at a time, then write your app to do only one at
a time.  You'll never get a ConflictError then, either.  Most people seem
much happier getting the benefits of true concurrency and dealing with
ConflictErrors.




From jcarlson at uci.edu  Tue Jan 20 20:30:00 2004
From: jcarlson at uci.edu (Josiah Carlson)
Date: Tue, 20 Jan 2004 17:30:00 -0800
Subject: CD Insert Notification in WinXP
References: <a5ednbL8y-KmUZDdRVn-uA@wideopenwest.com>
Message-ID: <20040120172241.0609.JCARLSON@uci.edu>

> I'm using Python 2.3 on a Win XP box, and I'm trying to find if there's 
> a library of some sort that will give you a callback (or something 
> comparable) when a new disc is inserted into a CD Rom drive. I've done a 
> little googling and nothing's come up, so I'm not holding my breath. :)
> 
> If not, I'm thinking of implementing a thread to periodically read the 
> volume serial number using GetVolumeInformation from Mark Hammond's Win 
> 32 extensions, then doing a compare against the last known value. Does 
> this sound "sane"? Any recommendations would be useful.

Tim,

Generally, Windows autoinsert notification can be enabled or disabled
for data and audio disks independantly.  When autoinsert notification is
enabled on data disks, the Windows operating system automatically does
what CD:\autorun.inf says.

I would imagine that a similar thing occurs on audio cd inserts, except
that it automatically calls the program that is associated with .cda
files.

Certainly there are hooks into the OS that allow one to intercept
filesystem read/write calls (it is what virus scanners do), which could
be tested to see if the read is from a cdrom drive, but I don't know if
Mark Hammond's extensions would be enough, though it is doubtful.


I would suggest polling the serial number every 5 seconds or so, making
sure to deal with the various exception conditions.

 - Josiah



From hwlgw at hotmail.com  Sat Jan  3 05:24:32 2004
From: hwlgw at hotmail.com (Will Stuyvesant)
Date: 3 Jan 2004 02:24:32 -0800
Subject: How to control a console based program from Python
Message-ID: <cb035744.0401030224.7d6d45b4@posting.google.com>

I never used the popen or popen2 libraries but it is my understanding
that they can capture the output of console based programs.  Is it
also possible to send keystrokes to console base programs?

I would like to program a Python program that can play for instance
the tty version of nethack 3.4.3 on Windows, simulating a human
player: for nethack it would not be possible to know if a human or a
computer program is playing it.  It is a console based program, it
accepts keystrokes and outputs characters on the (Windows) console
box.  I did see that WConio can read characters from the screen,
perhaps I can use that, have to experiment with it some more.  But how
to send keystrokes?  Any help and ideas are much appreciated.  And a
happy new year of course!


From vdebaere at lilly.csoftdotnet.invalid  Sun Jan 18 12:04:44 2004
From: vdebaere at lilly.csoftdotnet.invalid (Vincent De Baere)
Date: Sun, 18 Jan 2004 18:04:44 +0100
Subject: xml.dom.minidom childnodes
Message-ID: <400abcab$0$780$ba620e4c@news.skynet.be>

Hi

I am playing around a little with python (I've started using python at 1 
PM today, so I guess I could be considered a newbie :-)), and have come 
across a little problem regarding xml.dom.minidom.

this code snippet:

menudoc = xml.dom.minidom.parse("menu.xml")
menurootchildren = menudoc.documentElement.childNodes
menunode = menurootchildren[1].cloneNode(1)
sys.stdout.write(menunode.toprettyxml(" "))

acts on this file:

<?xml version="1.0" encoding="UTF-8"?>
<menu>
  <ol>
   <li>test</li>
   <li>test2</li>
   <li><ol><li>test3</li></ol></li>
  </ol>
  <ol>
   <li>please don't display this</li>
  </ol>
</menu>

The thing I got from the manual is that lists (such as menurootchildren) 
are zerobased.

As you can see in the xml file, there is a newline after the (root) 
documentelement. I guess that's why I need to use menurootchildren[1] 
instead of menurootchildren[0] to access the first child.

I was wondering how I could get the child elements (without the text 
nodes) instead of the childnodes, thus simply accessing the first child 
(first occurance of ol) element by using menurootchildren[0]. That's 
because I would very much like the script to come up with the same 
result regardless of if there is a newline after the root element or not...

TIA

Vincent


From gerrit at nl.linux.org  Thu Jan  8 07:11:34 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Thu, 8 Jan 2004 13:11:34 +0100
Subject: PRE-PEP: new Path class
In-Reply-To: <3FFC9209.7060703@beyond-thoughts.com>
References: <vvivefh35qjv9a@news.supernews.com>
	<3FFA7E82.4020609@beyond-thoughts.com>
	<mailman.159.1073418070.12720.python-list@python.org>
	<3FFC9209.7060703@beyond-thoughts.com>
Message-ID: <20040108121134.GA2610@nl.linux.org>

Christoph Becker-Freyseng wrote:
> openwith would be a nice add-on. I see two problems with it:
> 1.) it's long. I mean
>    f(str(path), *args)
>    is shorter than
>    path.openwith(f, *args)

This is indead a disadvantage. On the other hand, although p.openwith is
longer, I do think it is more readable. It occurs often that shorter is
not more readable: just think of all those 'obfuscated-oneliners'
contests in C and Perl.

> path > (f, arg1, arg2, ...)
> 
> (this works by overwriting path.__gt__)

I think this is not a good idea. In my opinion, any __gt__ method should
always compare, no more, no less. Further, it's very unusal to call
something like this.

Another possibility is defining __call__:

path(f, *args) == f(str(path), *args)

which may be unconvinient as well, however. Is it intuitive to let
calling mean opening?

> 2.) the position of the argument for the path can only be the first one.
> (maybe one could misuse even more operators e.g. the __r...__ ones; But 
> I think this will result in obscure code)

Hm, I think almost all file constructors have the path as the first
argument. Are there counter-examples?

> path.open shouldn't always call the ordinary file-constructor. I mean it 
> should be changed for special path-classes like FTPPath ...
> (Of course for ordinary file-paths the ordinary file-class is the right 
> one.)

Yes... I was planning to define it in a class which is able to 'touch'
the filesystem, so an FTPPath could subclass basepath without the need
to overload open, or subclass ReadablePath with this need.

> Additionaly path-validity is filesystem-dependend. And worse on system 
> like Linux there can be more than one file system within the same root / 
> and they all could have different restrictions!
> (if I were a viscious guy I could even umount and mount a different fs 
> making a valid path possibly invalid)

I think this makes validating a path essentially impossible to get
right. Let's say we can declare path to be invalid, but we can't declare
a path to be valid. Is it a good thing to add a method for it then? (I
think yes)

> So I think the better solution would be to define a
> path.isValid()

I agree that it's better. We should allow invalid paths after all.

> We also need a
> path.exists()
> method.

Sure.

> I'm not sure how both should interact ??

Well, if path.exists(), path.isValid(). The question is - should
path.isValid() read the filesystem?

> Another Point:
> Should Path be immutable like string?

I have though about this, too. It should certainly not be fully mutable,
because if a path changes, it changes. But maybe we could have a
.normalise_inplace() which mutates the Path? What consequences would
this have for hashability?

I like paths to be hashable. so they probably should be immutable.

yours,
Gerrit.

-- 
16. If any one receive into his house a runaway male or female slave of
the court, or of a freedman, and does not bring it out at the public
proclamation of the major domus, the master of the house shall be put to
death.
          -- 1780 BC, Hammurabi, Code of Law
-- 
PrePEP: Builtin path type
    http://people.nl.linux.org/~gerrit/creaties/path/pep-xxxx.html
Asperger's Syndrome - a personal approach:
	http://people.nl.linux.org/~gerrit/english/



From FBatista at uniFON.com.ar  Mon Jan  5 08:01:17 2004
From: FBatista at uniFON.com.ar (Batista, Facundo)
Date: Mon, 5 Jan 2004 10:01:17 -0300 
Subject: prePEP "Decimal data type" v0.2
Message-ID: <A128D751272CD411BC9200508BC2194D03383428@escpl.tcp.com.ar>

So, it got through!

When I posted I received a mail that it was blocked because it's size. I
asked to the list administrator and he told me to post it somewhere.

So I did:
http://www.taniquetil.com.ar/facundo/python/prePEP-Decimal-0.2.html

You have the reST version in that directory. By the way, which is the
extension for a reST document? (I used .txt).

.	Facundo


-----Mensaje original-----
De: Batista, Facundo 
Enviado el: Lunes 29 de Diciembre de 2003 2:11 PM
Para: Python-List (E-mail)
CC: Mariano Draghi (E-mail)
Asunto: prePEP "Decimal data type" v0.2


Here is the second version of the prePEP for the Decimal data type. 
Sorry for the delay, but I restructured it to new (thanks list), and 
changing to a new house and deploying GSM in Argentina are not very 
time-freeing tasks, :p 
Anyway, I'll appreciate any suggestion. Thank you! 
.       Facundo 


------------------------------------------------------------ 
PEP: 9999 
Title: Decimal data type 
Version: $Revision: 0.2 $ 
Last-Modified: $Date: 2003/12/29 13:35:00 $ 
Author: Facundo Batista <facundo at taniquetil.com.ar> 
Status: Draft 
Type: Standards Track 
Content-Type: text/x-rst 
Created: 17-Oct-2003 
Python-Version: 2.3.4 






. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . .
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remitente, borre el mensaje original y borre las copias (impresas o grabadas
en cualquier medio magn?tico) que pueda haber realizado del mismo. 

Todas las opiniones contenidas en este mail son propias del autor del
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From arjen.dijkstraNoSpam at hccnet.nl  Tue Jan 13 04:13:53 2004
From: arjen.dijkstraNoSpam at hccnet.nl (duikboot)
Date: Tue, 13 Jan 2004 10:13:53 +0100
Subject: Oracle to Mysql (dates) Help please
References: <btrj8h$oiq$1@news3.tilbu1.nb.home.nl>
	<a7i8d1-044.ln1@beastie.ix.netcom.com>
	<t7m8d1-q54.ln1@beastie.ix.netcom.com>
Message-ID: <4003b6e7$0$142$e4fe514c@dreader4.news.xs4all.nl>

Could you please explain that?

Cheers,

Arjen

"Dennis Lee Bieber" <wlfraed at ix.netcom.com> schreef in bericht
news:t7m8d1-q54.ln1 at beastie.ix.netcom.com...
> Dennis Lee Bieber fed this fish to the penguins on Sunday 11 January
> 2004 11:02 am:
>
>
> > (you'll need to build a tuple of tuples: ( (tabel1, b1), (tabel2, b2),
> > ..., (tabelN, Bn) ) but the rest looks similar)
> >
>         Whoops, slight mistake there -- I hadn't quite noticed that the
first
> term was the relation itself, and each Bx contained all the values for
> one row.
>
>         Someone else has the more correct variation...
>
> --
>  > ============================================================== <
>  >   wlfraed at ix.netcom.com  | Wulfraed  Dennis Lee Bieber  KD6MOG <
>  >      wulfraed at dm.net     |       Bestiaria Support Staff       <
>  > ============================================================== <
>  >        Bestiaria Home Page: http://www.beastie.dm.net/         <
>  >            Home Page: http://www.dm.net/~wulfraed/             <
>




From jdhunter at ace.bsd.uchicago.edu  Sat Jan  3 02:27:03 2004
From: jdhunter at ace.bsd.uchicago.edu (John Hunter)
Date: Sat, 03 Jan 2004 01:27:03 -0600
Subject: Speed?
In-Reply-To: <5.2.0.9.0.20040102221218.00b7c870@mail.zomething.com> (EP's
	message of "Fri, 02 Jan 2004 23:01:15 -0800")
References: <5.2.0.9.0.20040102221218.00b7c870@mail.zomething.com>
Message-ID: <m2vfntcx14.fsf@mother.paradise.lost>

>>>>> "EP" == EP  <EP at zomething.com> writes:

    EP> On questions of the suitability of Python for CGI, embedded
    EP> apps, etc., execution speed comes to mind.  I previously read
    EP> some comparisons which did not show Python in a good light in
    EP> this regard: i.e. Python is slow compared to Perl, C++, Java.

Donald Knuth, God of Computer Science, said "Premature optimization is
the root of all evil".  The essence of the quote is that you shouldn't
code for performance until the current implementation is hogging a
disproportionate chunk of the CPU cycles.  In layman's terms: code
something that works, and when you hit a performance bottleneck, run a
profiler, find the inefficiencies, and refactor looking for a 2-20x
performance boost.

I write python apps for the hospital I work for, mainly for epilepsy
patients.  The EEG data files are large, several hundred megabytes
each, and in addition we have CT and MRI 3D image data to incorporate.
python, with judicious use of Numeric and pygtk, is more than enough
to handle the everyday cases.  Are you dealing with several hundred
megabytes per record or more?  If not, my guess is that you can handle
your use cases in python with a little careful thought.

In a Nut's Hell, write a prototype app.  If you are unsatisfied with
performance, post here.  Otherwise, mark today as the last day you
ever coded perl, as I fondly mark that day 5 years ago.

JDH



From skip at pobox.com  Mon Jan  5 09:59:01 2004
From: skip at pobox.com (Skip Montanaro)
Date: Mon, 5 Jan 2004 08:59:01 -0600
Subject: [Python-Dev] PEP 324: popen5 - New POSIX process module
In-Reply-To: <1073314318.3ff97a0e68ffe@mcherm.com>
References: <1073314318.3ff97a0e68ffe@mcherm.com>
Message-ID: <16377.31669.703257.481535@montanaro.dyndns.org>


    Michael> And I vote +1 on changing the name from "popen5" to something
    Michael> else.  "process" (as suggested in the PEP) isn't too bad, but
    Michael> I'd certainly be open to another name.  If this is to replace
    Michael> the entire rest of the popenX family for most normal purposes,
    Michael> a separate, more comprehensible name will help newbies find it.

+2.  It would be one thing to have a module named "popen".  A casual user
can easily pop open the docs and see that it stands for "process open".
Determining the difference between popen and popenN (for N in range(1,6)) is
a bit more challenging.  I think it's time to abstract the names (at least)
frome their C heritage.

Skip



From a.neudecker at uni-bonn.de  Wed Jan 21 07:41:07 2004
From: a.neudecker at uni-bonn.de (Andreas Neudecker)
Date: Wed, 21 Jan 2004 13:41:07 +0100
Subject: Tutorial/Docs on threading with Python?
Message-ID: <buls14$q7u$1@f1node01.rhrz.uni-bonn.de>

Hi.

I would like to learn how to do threading with Python. I have not done 
threading before can anyone suggest URLs where I could find 
understandable information on that? (I am using Python for approx. 1 
year now, previous programming experiences lie back a long time).

Kind regards


Andreas




From martin at v.loewis.de  Sat Jan 24 04:10:19 2004
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 24 Jan 2004 10:10:19 +0100
Subject: Distutils - Program Distribution
In-Reply-To: <dcde6f.0401231045.5311773f@posting.google.com>
References: <dcde6f.0401231045.5311773f@posting.google.com>
Message-ID: <butcpm$ndi$04$1@news.t-online.com>

Jens Thiede wrote:

> Pardon the silly question, but can one use distutils to install
> somewhere other than site-packages, or is distutils only ment for this
> kind of a job. I'd like to use it to make the distribution of my
> programs simpler :)

You can achieve nearly anything with distutils by subclassing the
commands. The more you deviate from the standard procedures, the
more code you have to put into the subclasses.

Regards,
Martin



From rpm at wag.caltech.edu  Mon Jan 12 18:58:44 2004
From: rpm at wag.caltech.edu (Rick Muller)
Date: 12 Jan 2004 15:58:44 -0800
Subject: Why learn Python ??
References: <40029dad$0$28706$a729d347@news.telepac.pt>
Message-ID: <55e9dc4a.0401121558.3d7703c6@posting.google.com>

"Bicho Verde" <bichoverde at sapo.pt> wrote in message news:<40029dad$0$28706$a729d347 at news.telepac.pt>...
> And also I don't know exactly why would I learn Python rather than C#,
> C++ or Perl. 

I'd like to take a slightly different perspective on why you should
learn Python: it's simply more fun that the other languages. I know
lots of programming languages, and many are useful, but python is the
only language that I actually look forward to programming in. There is
a real elegance to the syntax, and, once you get used to the whole
indenting thing, you can use python as a pseudocode or an outlining
language. The more you enjoy a language, the more you will use it, and
the better you will be at it.


From jeremy at alum.mit.edu  Tue Jan 27 12:23:28 2004
From: jeremy at alum.mit.edu (Jeremy Hylton)
Date: Tue, 27 Jan 2004 12:23:28 -0500
Subject: Call for Participation: PyCon DC 2004 Sprints
Message-ID: <1075224208.24805.255.camel@localhost.localdomain>

Call for Participation
PyCon DC 2004 Sprints
March 20-23, 2004

http://www.python.org/cgi-bin/moinmoin/SprintPlan2004

The Python Software Foundation is sponsoring four days of sprints before
PyCon -- Saturday through Tuesday.  We invite developers to attend the
sprints.  We will provide space and network connectivity for developers
who want to work on open source projects.

A sprint is a two or three day focused development session, in which
developers pair in a room and focus on building a particular subsystem.
A sprint is organized with a coach leading the session. The coach sets
the agenda, tracks activities, and keeps the development moving. The
developers work in pairs using XP's pair programming approach.

We have several sprints already planned, including
   - Docutils and reStructuredText
   - Plone
   - Twisted topics
   - Zope 2 and Zope 3
   - Python core development

If you are interested in participating in a sprint, please send mail to
the appropriate sprint coach or to me.  Developers of all experience
levels are welcome.  We are also looking for coaches for other sprints
topics; if you have an idea, post it in the Wiki or send me an email. 
The PSF will waive PyCon registration fees for coaches of sprints with
at least two attendees.

Hope to see you there,
Jeremy Hylton
PyCon sprint chair





From pythonguy at Hotpop.com  Thu Jan 29 02:37:15 2004
From: pythonguy at Hotpop.com (Anand Pillai)
Date: 28 Jan 2004 23:37:15 -0800
Subject: wxPython: images from URLs
References: <mailman.810.1075149139.12720.python-list@python.org>	<fgse10l8pae12p0els55fsujllq2irrj0l@4ax.com>	<84fc4588.0401280613.771ac07@posting.google.com>
	<mailman.931.1075308709.12720.python-list@python.org>
Message-ID: <84fc4588.0401282337.79f0e8f8@posting.google.com>

This is the straight forward way to do this in wxPython
but somehow it always pops up that ugly error window.
I remember trying many options to do this purely using
wxPython (wxWindows), but I failed. 

If you use PIL in your program you can conver the
wx Image instance to a PIL image of type BMP and then
display it by reconverting it back to the wxImage
instance. PyWiew has methods to do this. The source code
is available somewhere in my Python page at
http://members.lycos.co.uk/anandpillai . I no longer
maintain that program, but the latest source code should
be available there.

Regards

-Anand

Jonathan Daugherty <cygnus at cprogrammer.org> wrote in message news:<mailman.931.1075308709.12720.python-list at python.org>...
> # self._imgstream = urllib2.urlopen(url).read()
> # stream=cStringIO.StringIO(self._imgstream)
> # 
> # try:
> #    img=wxImageFromStream(stream)
> # except:
> #    pass
> 
> I have tried this and it appears to work, but once I have
> the image (from wxImageFromStream), I use it as follows:
> 
> try:
>     bm = wxBitmap(img)
>     self.bitmap.setBitmap(bm)
> except Exception, e:
>     print e
> 
> And the exception (raised by wxBitmap(img)) is:
> 
>   String or Unicode type required
> 
> (The exception is a TypeError exception.)
> 
> Any ideas?  No exceptions are raised by the block that
> creates the image from the data stream.  The image is
> a JPG image, and I pass wxBITMAP_TYPE_JPEG to
> wxImageFromStream.  I have also tried omitting it as
> well.


From newsgroups at jhrothjr.com  Thu Jan  8 08:24:50 2004
From: newsgroups at jhrothjr.com (John Roth)
Date: Thu, 8 Jan 2004 08:24:50 -0500
Subject: Descriptor puzzlement
References: <vvqjj92il4o1d0@news.supernews.com>
	<m34qv6388c.fsf@pc150.maths.bris.ac.uk>
Message-ID: <vvqmi8t7ot9p5a@news.supernews.com>


"Michael Hudson" <mwh at python.net> wrote in message
news:m34qv6388c.fsf at pc150.maths.bris.ac.uk...
> "John Roth" <newsgroups at jhrothjr.com> writes:
>
> [snippety]
>
> > It doesn't look like the descriptor protocol is getting
> > invoked at all.
> >
> > What's happening here?
>
> Descriptors need to be attached to classes.

Arrrgggh! Of course!

John Roth
>
> Cheers,
> mwh
>




From guettli at thomas-guettler.de  Wed Jan 14 06:08:57 2004
From: guettli at thomas-guettler.de (Thomas Guettler)
Date: Wed, 14 Jan 2004 12:08:57 +0100
Subject: Inserting while itterating
References: <pan.2004.01.14.08.43.00.894047@thomas-guettler.de>
Message-ID: <pan.2004.01.14.11.08.57.651432@thomas-guettler.de>

Am Wed, 14 Jan 2004 09:43:01 +0100 schrieb Thomas Guettler:

> Hi,
> 
> Simple excerise:
> 
> You have a sorted list of integers:
> l=[1, 2, 4, 7, 8, 12]
> 
> and you should fill all gaps:
> 
> result == [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]
> 
> How would you code this?
> 
> Constrain: The original list should be changed,
> don't create a copy.

No, this is not a homework exerice, 
I was just interested if you have better solutions.
Thank you for your solutions.
Mine looks like this:

l=[1, 2, 4, 7, 8, 12]

i=-1
while 1:
    i+=1
    this=l[i]
    if i+1==len(l):
        # End of list
        break
    next=l[i+1]
    assert(this<next)
    for add in range(this+1, next):
        i+=1
        l.insert(i, add)
print l



From bignose-hates-spam at and-benfinney-does-too.id.au  Mon Jan  5 20:45:50 2004
From: bignose-hates-spam at and-benfinney-does-too.id.au (Ben Finney)
Date: 6 Jan 2004 12:35:50 +1050
Subject: using cgi form via http and extracting results
References: <3ff84844.0@news1.mweb.co.za>
	<ca4kvvskfmi3mm69t6hq8u8tkmch84jsv1@4ax.com>
Message-ID: <slrnbvk5vu.js6.bignose-hates-spam@iris.polar.local>

On Mon, 05 Jan 2004 17:39:30 -0800, Tim Roberts wrote:
> bmgx <bmgx_no_sp at mgleesonprop.co.za> wrote:
>>1) Make an http connection to the remote script (http://server/script.cgi)
>>2) Fill out the html form (1x TEXT and 2x SELECT input fields)
>>3) Submit the form
>>4) extract the actual returned result. (using regex or something..)
> 
> You don't actually need steps 1 and 2 at all.

True.

> HTTP transactions are all completely separate.

True (ignoring cookies for now).

> The results of a form submission are just a URL.

Usually false.

The result of most form submissions is an HTTP POST request, which
contains the URL and form content as separate data.

> If the form has fields "FromCurrency", "ToCurrency", and "Amount", all
> you have to do is this:
> 
> http://www.currencyservice.com?FromCurrency=dollars&ToCurrency=pounds&Amount=15

This is only true if the form action is an HTTP GET request, which is a
rather insecure and ugly way to submit form data, and makes it
impossible to submit many kinds of data.  HTTP POST is the recommended
method for submitting data to a CGI script.

> You don't have to HAVE the form source in order to submit a request.

True.  You just need to construct the HTTP POST request correctly.

-- 
 \          "It's a good thing we have gravity or else when birds died |
  `\             they'd just stay right up there. Hunters would be all |
_o__)                                     confused."  -- Steven Wright |
Ben Finney <http://bignose.squidly.org/>


From mtk at qm.com  Wed Jan 14 21:42:43 2004
From: mtk at qm.com (Totte Karlsson)
Date: Wed, 14 Jan 2004 18:42:43 -0800
Subject: Printing to console (No Scroll)
References: <mailman.365.1074103229.12720.python-list@python.org><bu41k5$4in$00$2@news.t-online.com><mailman.366.1074106671.12720.python-list@python.org><bu456a$89s$02$1@news.t-online.com>
	<bu45kp$d99m3$1@ID-46268.news.uni-berlin.de>
Message-ID: <bu4um3$f9c$1@sea.gmane.org>

Great, thanks for all help! I'll try these things

"Derek" <none at none.com> wrote in message
news:bu45kp$d99m3$1 at ID-46268.news.uni-berlin.de...
> "Diez B. Roggisch" wrote
> > > Any alternatives to ncurses? It seems like a overkill for this...
> >
> > Maybe you can use sys.stdout.write in conjunction with control-
> > codes for moving back the cursor to column one. But you'll have
> > to lookup these for yourself :)
>
> I think \r is the control code (at least if you want to go back to the
> start of the line):
>
> import time, sys
> for second in range(10):
>      time.sleep(1)
>      sys.stdout.write(`10-second` + " seconds \r")
>      sys.stdout.flush()
>
>
> -- 
> http://mail.python.org/mailman/listinfo/python-list
>






From engsolnom at ipns.com  Sat Jan  3 17:13:59 2004
From: engsolnom at ipns.com (engsolnom at ipns.com)
Date: Sat, 03 Jan 2004 14:13:59 -0800
Subject: importing
References: <231bc96c.0401031249.12cff6d7@posting.google.com>
Message-ID: <6dfevvcfm8a8ojoduvsr1p4u72p4et28al@4ax.com>

On 3 Jan 2004 12:49:56 -0800, boomer4467 at yahoo.com (Boomer) wrote:

>Hi all,
>    I'm new to python which explains my problems with this. I'm trying
>to import a .csv file(from excel) into some fields on my company's
>software system(which interfaces to an sql database. Each row in this
>.csv file needs to be split into smaller strings and each respective
>string applied to it's field in the software then it's saved and the
>next row starts, here's the code I've come up with so far.
>
>f=open ("book1.csv", "r")
>s=f.readline ()
>while s != "":
>  print s
>  l = s.split(s,",",(11))
>  PlayIt.SetFieldContent ("SY012M1", "art-nr", l[0])
>  PlayIt.PlayContent ("{CSB SY012M1|art-nr}{Enter}")
>  PlayIt.SetFieldContent ("SY012ADM1", "001bez",  l[1])

I'm just a newbie, but I'll take a crack at it any way...

split returns a list, and takes either one or two args. If the the first arg is missing, it defaults
to setting the separator to while space. In your case, you might try:

l = s.split(',', 11)

Norm


From crawley.storm.dontsendmeemail at ntlworld.com  Sat Jan 31 06:21:37 2004
From: crawley.storm.dontsendmeemail at ntlworld.com (Crawley)
Date: Sat, 31 Jan 2004 11:21:37 +0000
Subject: win32com support
References: <Xns947FEAF73D102crawleystormntlworld@217.158.240.24>
	<bveqqb$1fue$1@arachne.labyrinth.net.au>
Message-ID: <Xns94817485CEFF0crawleystormntlworld@217.158.240.23>

Thanks for the reply, 

Now I think Ive figured out whats going on. Im getting the following 
error:

Traceback (most recent call last):
  File "E:\Python23\lib\site-packages\win32com\universal.py", line 170, 
in dispatch
    retVal = ob._InvokeEx_(meth.dispid, 0, meth.invkind, args, None, 
None)
  File "E:\Python23\lib\site-packages\win32com\server\policy.py", line 
322, in _InvokeEx_
    return self._invokeex_(dispid, lcid, wFlags, args, kwargs, 
serviceProvider)
  File "E:\Python23\lib\site-packages\win32com\server\policy.py", line 
601, in _invokeex_
    return DesignatedWrapPolicy._invokeex_( self, dispid, lcid, wFlags, 
args, kwArgs, serviceProvider)
  File "E:\Python23\lib\site-packages\win32com\server\policy.py", line 
541, in _invokeex_
    return func(*args)
  File "E:\code\Python\VCAddin.py", line 69, in OnConnection
    application.SetAddInInfo(None, self._command, -1, -1, addin )
  File "E:\Python23\lib\site-packages\win32com\client\dynamic.py", line 
460, in __getattr__
    raise AttributeError, "%s.%s" % (self._username_, attr)
exceptions.AttributeError: <unknown>.SetAddInInfo


Which I believe is because the object I'm calling does not support the 
SetAddInInfo method.


After a bit of investigation, this makes sense as my class extends 
_IDTExtensibility2 and for that the application parameter is of type 
'Object'.  I cant see how to cast this into an IApplication instance, 
which is what I need to call my function.

Ive also tried making my object derive from IDSAddin (what VC uses), but 
when I try the following (GUID found 
here:http://msdn.microsoft.com/library/default.asp?url=/library/en-
us/vcug98/html/_asug_how_add.2d.ins_connect_and_disconnect.asp)

universal.RegisterInterfaces('{C0002F81-AE2E-11cf-AD07-00A0C9034965}', 0, 
1, 0, ["_IDSAddin"])

I get the following error:

Traceback (most recent call last):
  File "E:\code\Python\VCAddin.py", line 33, in ?
    universal.RegisterInterfaces('{C0002F81-AE2E-11cf-AD07-
00A0C9034965}', 0, 1, 0, ["_IDSAddin"])
  File "E:\Python23\lib\site-packages\win32com\universal.py", line 21, in 
RegisterInterfaces
    tlb = pythoncom.LoadRegTypeLib(typelibGUID, major, minor, lcid)
pywintypes.com_error: (-2147319779, 'Library not registered.', None, 
None)

Am I using the wrong name ('_IDSAddin') or the wrong GUID or is something 
more major going wrong.

Thanks for your help

Rich


From jepler at unpythonic.net  Thu Jan  8 22:43:11 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Thu, 8 Jan 2004 21:43:11 -0600
Subject: Python equivalent of settimeofday()?
In-Reply-To: <781faf41.0401081838.10de95c9@posting.google.com>
References: <781faf41.0401081838.10de95c9@posting.google.com>
Message-ID: <20040109034311.GE24734@unpythonic.net>

I don't think anybody's exposed it to Python yet.  However, this would
be an easy thing to write in C, SWIG, Pyrex, or ctypes.  Pick one and
get your feet wet!



From daniel.dittmar at sap.com  Thu Jan 15 09:48:33 2004
From: daniel.dittmar at sap.com (Daniel Dittmar)
Date: Thu, 15 Jan 2004 15:48:33 +0100
Subject: TUPLE & LIST
References: <%7xNb.55$Uw3.50@newsr2.u-net.net>
Message-ID: <bu6982$orf$1@news1.wdf.sap-ag.de>


"Yomanium Yoth Taripo?t II" <Yomanium at Yomanium.com> wrote in message
news:%7xNb.55
> 1) what are the differences between list and tuple?
http://www.python.org/doc/faq/general.html#why-are-there-separate-tuple-and-
list-data-types

> 2) how to concatenate tuple and list? no method, no op?rator?
listvar + list (tuplevar)
tuple (listvar) + tuplevar

> 3) im looking the fucking manual, and cant add value in my tuple, when it
> already created :/
>   how to do it?
Try the Python Manual instead:
http://www.python.org/doc/current/lib/typesseq-mutable.html
I know it's not always easy to locate the documentation for the builtin
types.

Daniel





From phipps.xue at sap.com  Fri Jan  9 04:37:03 2004
From: phipps.xue at sap.com (Phipps Xue)
Date: Fri, 9 Jan 2004 17:37:03 +0800
Subject: Syntax highlighting in .NET IDE
References: <4iPKb.764$K_3.702@newssvr29.news.prodigy.com>
	<vvninrtm2fkaa2@corp.supernews.com>
Message-ID: <btlso1$afs$1@news1.wdf.sap-ag.de>


"Michael Geary" <Mike at DeleteThis.Geary.com> wrote in message
news:vvninrtm2fkaa2 at corp.supernews.com...
> Moosebumps wrote:
> > Is there a way to have the .NET IDE do syntax highlighting for
> > python?  I haven't looked into it that much, but perhaps there
> > is some config file one can download.
> >
> > Don't ask why, I know there are better editors, but I have
> > special circumstances.  : )
>
> Visual Python integrates full Python support into VS.NET. It's not cheap
but
> it's very good:
>
> http://www.activestate.com/Products/Visual_Python/

It doesn't take full advantage of Visual Studio .NET. I do not know why it
creates it's own output window instead of VS.NET's. Anyway, this is not an
import tant issue. :-D

>
> There is also Komodo, which runs separately from VS.NET but feels so much
> like VS.NET that it's hard to tell the difference:
>
> http://www.activestate.com/Products/Komodo/?_x=1
>
> -Mike
>
>




From michele.simionato at poste.it  Wed Jan 21 07:04:03 2004
From: michele.simionato at poste.it (Michele Simionato)
Date: 21 Jan 2004 04:04:03 -0800
Subject: converting base class instance to derived class instance
References: <930ba99a.0401200413.5fae6fb9@posting.google.com>
Message-ID: <95aa1afa.0401210404.49b65b4b@posting.google.com>

sridharinfinity at yahoo.com (Sridhar R) wrote in message news:<930ba99a.0401200413.5fae6fb9 at posting.google.com>...
> Consider the code below,
> 
> class Base(object):
>   pass
> 
> class Derived(object):
> 
>   def __new__(cls, *args, **kwds):
>     # some_factory returns an instance of Base
>     # and I have to derive from this instance!
>     inst = some_factory() # this returns instance of Base
>     return inst  # Oops! this isn't an instance of Derived
> 
>   def __init__(self):
>     # This won't be called as __new__ returns Base's instance
>     pass
> 
>   The constrait is there is some factory function that creates an
> instance of Base class.  So I _can't_ call "Base.__init__(self)" in
> Derived.__init__ func, as their will be _two_ instances (one created
> by Derived.__init__ and other created by the factory function)
> 
>   Simply I want to get a derived class object, but instead of allowing
> _automatic_ creation of Base instance, I want to use _existing_ Base's
> instance, then use this as a Derived's instance.
> 
>   Will metaclass solve this problem?

I don't really understand what you want to do (i.e. do you want 
Derived.__init__ to be called or not?). Moreover, as others pointed
out, it is cleaner to use a class factory than to pervert __new__.
If you really want to use a metaclass, you could override the 
__call__ method of the metaclass, in such a way to interfer with the
class instantiation. For instance, this is the code to make a singleton
class (which is a FAQ ;)

class Singleton(type):
    "Instances of this metaclass are singletons"
    def __init__(cls,name,bases,dic):
        super(Singleton,cls).__init__(name,bases,dic)
        cls.instance=None
    def __call__(cls,*args,**kw):
        if cls.instance is None:
            cls.instance=super(Singleton,cls).__call__(*args,**kw)
        return cls.instance

class C:
    __metaclass__=Singleton

This is not what you want but you can play with __call__ and get 
the behavior you want. Still, why don't just use a simple factory?

     Michele Simionato


From aaron at reportlab.com  Tue Jan 13 19:33:21 2004
From: aaron at reportlab.com (Aaron Watters)
Date: 13 Jan 2004 16:33:21 -0800
Subject: Databases: Which one's right for me?
References: <mailman.304.1073931560.12720.python-list@python.org>
Message-ID: <9a6d7d9d.0401131633.31ee5a60@posting.google.com>

""Tim Peters" <tim.one at comcast.net> wrote in message news:<mailman.304.1073931560.12720.python-list at python.org>...
> [Aaron Watters]> 
> > Transactions don't have to be complex to cause serious problems in
> > read-committed mode:  the classic example is a debit of $1000 for
> > checking account 123 running at the same time as a credit for $4000
> > for checking account 123.  If both transactions run at the same time
> > and read the same previous (committed) balance and they both
> > complete but the first one completes last then the customer is
> > screwed to the tune of $4000.
> 
> This one isn't a problem in ZODB.  The second transaction that tries to
> commit will fail, with a ConflictError exception.  It's up to the
> application then to either abort the failed transaction, or retry it....

Alright, just for yucks.  
Total blood supply must be kept above 50 except during emergencies.
Two transactions notice that there are 40 in bin 1 and 40 in bin two,
so one takes 30 units from bin 1 and the other takes 30 units from bin 2.

Or even return to the original problem assuming that the balance doesn't
change but the debits are entered as separate journal entries, where the
current balance is computed on the fly as the old balance less withdrawals...

Sorry, I just don't know when to shut up, I know.  But when I see
ACID I assume these things are not a problem.
   -- Aaron Watters

ps: Tim anticipated this reply in his post somewhat, but wasn't
  concrete enough for my taste.
===
It ain't the years, it's the mileage.  -- Indiana Jones


From salgado at freeshell.org  Mon Jan 26 06:07:34 2004
From: salgado at freeshell.org (Guilherme Salgado)
Date: Mon, 26 Jan 2004 09:07:34 -0200
Subject: delta time = time stop - time start
In-Reply-To: <cs9910pcgktdrp1e8abctoptue7braqvqu@4ax.com>
References: <cs9910pcgktdrp1e8abctoptue7braqvqu@4ax.com>
Message-ID: <1075115254.21402.5.camel@maluf.alcatraz>

On Mon, 2004-01-26 at 04:08, engsol wrote:
[...]
> The routine I came up with is below, but seems a bit clunky.
> Is there a better way of doing this? I think it relies too much on integers rounding off in the proper direction, a la
> d_time_hr = d_time / 3600 below.
> 

You can use mx.DateTime
(http://www.lemburg.com/files/python/mxDateTime.html).
Then, the code will look like this:

from mx import DateTime
start = DateTime.now()
# do something ...
stop = DateTime.now()
delta = (stop - start).strftime("%H:%M:%S")

hope it helps.

> Also, this will have to transition to Linux, if that makes a difference.
> 
> START CODE:
> 
> import string
> 
> def deltatime(start, stop):
> 
>     t_start = (string.atoi(start[0:2]) * 3600) + (string.atoi(start[3:5]) * 60) + string.atoi(start[6:8])
>     t_stop  = (string.atoi(stop [0:2]) * 3600) + (string.atoi(stop [3:5]) * 60) + string.atoi(stop [6:8])
> 
>     if t_start < t_stop:
>         d_time = t_stop - t_start
>     else:
>         d_time = (86400 - t_start) + t_stop
> 
>     d_time_hr  =  d_time / 3600
>     d_time_min = (d_time - d_time_hr * 3600) / 60
>     d_time_sec = (d_time - d_time_hr * 3600) - (d_time_min * 60)
> 
>     return str(d_time_hr) + 'hr ' + str(d_time_min) + 'min ' + str(d_time_sec) + 'sec'
> 
> END CODE

[]'s
Salgado
-- 
This email has been inspected by Hans Blix, who has reported that no
weapons of mass destruction were used in its construction. 
Read his report here:
<http://www.un.org/apps/news/infocusnewsiraq.asp?NewsID=414&sID=6>




From tr at jotsite.com  Sun Jan 25 12:37:06 2004
From: tr at jotsite.com (Hoang)
Date: Sun, 25 Jan 2004 17:37:06 GMT
Subject: Unique ID for CD or DVD
Message-ID: <69TQb.15674$Le1.6291@newssvr27.news.prodigy.com>

Does anyone know of an existing algorithm/module for generating a unique ID
for a given CD or DVD?  This would be something akin to CDDB where a CD is
recognized based on its content.  I could be wrong, but I think CDDB is just
based on file size or disk size and this alone is not unique enough.  If the
solution is in Python, all the better.

Hoang Do
http://jotsite.com




From corey.coughlin at attbi.com  Thu Jan 29 19:06:20 2004
From: corey.coughlin at attbi.com (Corey Coughlin)
Date: 29 Jan 2004 16:06:20 -0800
Subject: number of arguments a function takes
References: <CSaSb.329909$ts4.189798@pd7tw3no>
	<Xns947FAE6461014duncanrcpcouk@127.0.0.1>
	<YVbSb.319671$JQ1.192347@pd7tw1no>
Message-ID: <a8623416.0401291606.1fa4de31@posting.google.com>

"Elaine Jackson" <elainejackson7355 at home.com> wrote in message news:<YVbSb.319671$JQ1.192347 at pd7tw1no>...
> Exactly what I was looking for. Thank you very much.
> 
> "Duncan Booth" <me at privacy.net> wrote in message
> news:Xns947FAE6461014duncanrcpcouk at 127.0.0.1...
> | "Elaine Jackson" <elainejackson7355 at home.com> wrote in
> | news:CSaSb.329909$ts4.189798 at pd7tw3no:
> |
> | > Suppose one of the arguments of a function f_1 is another function
> | > f_2. Can f_1 access the number of arguments taken by f_2?  (I'm
> | > writing a little script to automate the construction of logical
> | > truth-tables.)  Thanks.
> |
> | Look at the inspect module, in particular you probably want
> | inspect.getargspec:
> |
> | >>> import inspect
> | >>> def f(a,b): pass
>  
> | >>> inspect.getargspec(f)
>  (['a', 'b'], None, None, None)
> | >>> help(inspect.getargspec)
> | Help on function getargspec in module inspect:
> |
> | getargspec(func)
> |     Get the names and default values of a function's arguments.
> |
> |     A tuple of four things is returned: (args, varargs, varkw, defaults).
> |     'args' is a list of the argument names (it may contain nested lists).
> |     'varargs' and 'varkw' are the names of the * and ** arguments or None.
> |     'defaults' is an n-tuple of the default values of the last n arguments.
> |
> | >>>

So you're working on a truth table program?  I have a truth table
object I did for my own application, more focused on finding
input/output transitions in arbitrary truth tables, but if you're
interested, let me know.  Regardless, are you working on something
that will ultimately become public?  If so, be sure to announce it
when you're done, I'd love to have a look.  Especially if you're doing
anything with functional simplification, my object can return a simple
SOP function for a table (reducing out unused inputs is also an
option) but they can get kind of lengthy for complicated functions. 
And if you need any other help, be sure to let me know!


From kenney at netacc.net  Wed Jan 28 07:26:07 2004
From: kenney at netacc.net (J. Kenney)
Date: 28 Jan 2004 04:26:07 -0800
Subject: Python Importing and modifying print
Message-ID: <9742a725.0401280426.329d2178@posting.google.com>

Good Morning, 

Is there a way for a function called within an _imported_ 
library to call back to _calling_ python program to run a 
function? (Shown below) 

Also can you overload the print function to have it do
redirect output to an array for a bit, and then switch
it back.  (for example: right before importing make print
append each line to an array vice printing it, then going
back to normal after the import is complete.)

Many thanks!

#first_file.py
#!/usr/local/bin/python
import newlib
def main():
  print 'hi'

#newlib.py
def go():
  ???????.main()
  ???????.main()
go()

#Desired results
% ./first_file.py
hi
hi
%


From FBatista at uniFON.com.ar  Wed Jan 14 16:15:34 2004
From: FBatista at uniFON.com.ar (Batista, Facundo)
Date: Wed, 14 Jan 2004 18:15:34 -0300
Subject: Quick question.....
Message-ID: <A128D751272CD411BC9200508BC2194D033834BD@escpl.tcp.com.ar>

featherstone80 wrote:

#- numberlist = [10, 2, 5, 7, 3, 46, 4, 5, 87, 5]
#- 
#- How would I get the total, and how would I get the average?


Python 2.3 (#46, Jul 29 2003, 18:54:32) [MSC v.1200 32 bit (Intel)] on win32
...
>>> numberlist = [10, 2, 5, 7, 3, 46, 4, 5, 87, 5]
>>> sum(numberlist)
174
>>> len(numberlist)
10
>>> sum(numberlist)/len(numberlist)
17
>>> from __future__ import division
>>> sum(numberlist)/len(numberlist)
17.399999999999999

.	Facundo



From fumanchu at amor.org  Sat Jan 31 01:44:42 2004
From: fumanchu at amor.org (Robert Brewer)
Date: Fri, 30 Jan 2004 22:44:42 -0800
Subject: timeit
Message-ID: <DE1CF2B4FEC4A342BF62B6B2B334601E561CA9@opus.amorhq.net>

Duncan Smith wrote:
> >>> import SDC_table
> >>> import subtract
> >>> import timeit
> >>> t = SDC_table.RandomTable(1, 12, (2,3,4))
> >>> s = """\
> p = subtract.p_risk(t.values, 10)
> """
> >>> tim = timeit.Timer(stmt=s)
> >>> tim.timeit(10)
> 
> Traceback (most recent call last):
>   File "<pyshell#119>", line 1, in -toplevel-
>     tim.timeit(10)
>   File "C:\Python23\lib\timeit.py", line 158, in timeit
>     return self.inner(it, self.timer)
>   File "<timeit-src>", line 6, in inner
> NameError: global name 'subtract' is not defined
> 
> # yet
> >>> exec(s)
> >>> p
> 0.242621453769059

I believe you need to put *any* initialization code (like "import
subtract") into the "setup" parameter to Timer(). So try something like:

> >>> import timeit
> >>> s = """p = subtract.p_risk(t.values, 10)"""
> >>> tim = timeit.Timer(stmt=s, setup="import SDC_table, subtract; t =
SDC_table.RandomTable(1, 12, (2,3,4))")
> >>> tim.timeit(10)


HTH

Robert Brewer
MIS
Amor Ministries
fumanchu at amor.org



From marco at bubke.de  Mon Jan  5 06:29:00 2004
From: marco at bubke.de (Marco Bubke)
Date: Mon, 05 Jan 2004 12:29:00 +0100
Subject: Scoped Lock
References: <bt9ovs$p92$1@graf.cs.uni-magdeburg.de>
	<3ff8a259$0$121$e4fe514c@dreader10.news.xs4all.nl>
Message-ID: <btbhpt$l0l$1@graf.cs.uni-magdeburg.de>

Ype Kingma wrote:

> Marco Bubke wrote:
> 
>> Hi
>> 
>> There is the Lock object in the threading module.
>> But there is no medode there I could aquire a scoped
>> lock like:
>> 
>> mutex = threading.Lock()
>> my_lock = mutex.scoped_acquire() # maybe scoped_lock()
>> #now this stuff is locked
>> 
>> del mylock
>> 
>> #the lock is released.
>> 
>> def do_domething:
>>   my_lock = mutex.scoped_acquire()
>>   #now this stuff is locked
>>   #the lock is released after its out of scope
>> 
>> 
>> I have written this my own but I'm not sure there is a drawback
>> because its looks so convinent. So I wonder why its not in
>> the module?
> 
> Some reasons:
> - What should happen when an exception happens during the locked stuff?
> - It is possible pass a reference to the lock during the locked stuff,
>   so although the lock goes out of local scope, there still might be
>   a reference to it.
> - The moment that __del__() is called is not guaranteed.
> 
> You can also do it like this:
> 
> mutex = threading.Lock()
> mutex.acquire()
> try:
>     # now this stuff is locked
> finally:
>     mutex.release() # explicit is better than implicit

This does not look nice to me. There should be something me easily.
Maybe that:

def do_something() lock(mutex):
        #this stuff is locked by the mutex

So you don't forget to release the lock.

best regards

Marco



From me at privacy.net  Thu Jan 29 09:31:33 2004
From: me at privacy.net (Duncan Booth)
Date: 29 Jan 2004 14:31:33 GMT
Subject: comparing booleans
References: <mailman.951.1075324969.12720.python-list@python.org>
	<40185112.264898A4@alcyone.com>
	<eaa90cc908c7a217f0d6475e41c7622d@news.teranews.com>
Message-ID: <Xns947F8A0A32392duncanrcpcouk@127.0.0.1>

Dang Griffith <noemail at noemail4u.com> wrote in 
news:eaa90cc908c7a217f0d6475e41c7622d at news.teranews.com:

> Interestingly, and I'm not sure why:
>>>> (True != True) != True
> True
>>>> True != (True != True)
> True
>>>> True != True != True
> False

You can chain comparison operators in Python. e.g.

    a < b < c

is the same as:

    (a < b) && (b < c)

except that if b is an expression the first form evaluates it exactly once 
whereas the second form evaluates it either once or twice.

You can use any comparison operators in this form, so your True!=True!=True 
is just shorthand for:

    (True!=True) && (True!=True)

which is in turn equivalent to:

    False && (True!=True)

and 'False && anything' gives False.


From dd at guv.ethz.ch  Sat Jan 31 06:27:57 2004
From: dd at guv.ethz.ch (=?iso-8859-15?Q?David_D=FCrrenmatt?=)
Date: Sat, 31 Jan 2004 12:27:57 +0100
Subject: zlib
Message-ID: <opr2m0svtf1bpyqk@news.swissonline.ch>

Hi,

I am looking for a zlib implementation (or any other which can handle zip 
archives) for Python 1.5.2. I only found one for Python >= 2.2 :-(



Thanks
Dave

-- 
Using M2, Opera's revolutionary e-mail client: http://www.opera.com/m2/


From faizan at jaredweb.com  Wed Jan 28 15:42:06 2004
From: faizan at jaredweb.com (Fazer)
Date: 28 Jan 2004 12:42:06 -0800
Subject: Best way to compare a list?
References: <7b454334.0401271739.59267018@posting.google.com>
	<mailman.886.1075263140.12720.python-list@python.org>
Message-ID: <7b454334.0401281242.3bd604e6@posting.google.com>

John Hunter <jdhunter at ace.bsd.uchicago.edu> wrote in message news:<mailman.886.1075263140.12720.python-list at python.org>...
> >>>>> "Fazer" == Fazer  <faizan at jaredweb.com> writes:
> 
>     Fazer> Hello, I was wondering which would be the best way to
>     Fazer> compare a list?
> 
>     Fazer> I was thinking of just using a for loop and testing the
>     Fazer> condition.
> 
>     Fazer> What do you guys think?  The best/fastest way of comparing
>     Fazer> lists.
> 
> What do you want to compare for, equality of all elements?  Give a
> little more info about what you need to do.  
> 
> JDH

Sorry about that.  

Basically, I have to lists.  I have to compare them and pick out the difference(s).

Maybe the simple/fast approach would be to use a for loop?

Thanks,


From exarkun at intarweb.us  Tue Jan 13 16:44:46 2004
From: exarkun at intarweb.us (Jp Calderone)
Date: Tue, 13 Jan 2004 16:44:46 -0500
Subject: Why learn Python ??
In-Reply-To: <bu1gt7$cn6mk$1@ID-46268.news.uni-berlin.de>
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<btubno$bd8k6$1@ID-46268.news.uni-berlin.de>
	<100655fo84c2211@corp.supernews.com>
	<btv7gf$btv1p$1@ID-46268.news.uni-berlin.de>
	<87d69og2jl.fsf@pobox.com>
	<bu0v9v$c6nr4$1@ID-46268.news.uni-berlin.de>
	<873cajafr8.fsf@pobox.com>
	<bu1gt7$cn6mk$1@ID-46268.news.uni-berlin.de>
Message-ID: <20040113214446.GA14438@intarweb.us>

On Tue, Jan 13, 2004 at 02:28:38PM -0500, Derek wrote:
> "John J. Lee" wrote:
> > [...]
> > > Point taken.  I once worked on a project where we
> > > implemented a production system in C++ and then
> > > implemented it again in Python for QA purposes.  It took
> > > about 150k lines of C++ code and 10k lines of Python.
> > > Python took less code because so many modules are bundled
> > > with the language, but the C++ system ran many times
> > > faster.  It's all about picking the right tool for the
> > > job.
> >
> > Well, that's a banal truism obscuring the fact that, for the
> > great majority of projects, optimisation does not require
> > implementation of the *entire* system in a language like
> > C++.  The sum of C++ and Python is greater than the parts.
> 
> Python and C++ can also be a bigger mess than sum of either part.
> Take your pick.
> 

  Look at how many modules in the stdlib are not implemented in Python. 
Look at all the builtin types.  It *can* and *does* work, and with very
little mess, if you know what you're doing.

  Jp

> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list
> 



From dietrich at zdome.net  Mon Jan 19 18:47:56 2004
From: dietrich at zdome.net (Dietrich Epp)
Date: Mon, 19 Jan 2004 15:47:56 -0800
Subject: Getting a process's output [solved]
In-Reply-To: <20040119221350.GB11631@nl.linux.org>
References: <82104858-4ACB-11D8-A692-0003934ACDEC@zdome.net>
	<20040119221350.GB11631@nl.linux.org>
Message-ID: <E7E8F62A-4AD9-11D8-A692-0003934ACDEC@zdome.net>


On Jan 19, 2004, at 2:13 PM, Gerrit Holl wrote:

> Dietrich Epp wrote:
>> Is there any easy way to get all the output of a process?  Ideally, 
>> the
>> function takes parameters like exec(), calls fork(), wait()s for the
>> process to complete, and returns the process's stdout, stderr, and 
>> exit
>> status.  By stdout and stderr I don't mean file objects or
>> descriptors... I mean strings containing the entire output.
>>
>> I would try to do it myself, but I'm not sure how to interleave the
>> operations.
>
> Try commands.getstatusoutput() or the various popen functions.

Thanks, although getstatusoutput requires arguments to be quoted.  I 
looked at the source code to getstatusoutput() and popen() to come up 
with a replacement which doesn't need quoted arguments and doesn't 
create a shell.  I don't think it portable, and it will undoubtedly do 
something very nasty if one of the system calls should fail.  I think 
this would be very cool in the library (the function, not its 
deficiencies).

import os
import sys

def run_process(path, args):
     out_r, out_w = os.pipe()
     pid = os.fork()
     if pid:
         os.close(out_w)
         outf = os.fdopen(out_r)
         text = outf.read()
         outf.close()
         status = os.waitpid(pid, 0)[1]
         return status, text
     else:
         try:
             if out_w != 1:
                 os.close(1)
                 os.dup2(out_w, 1)
             if out_w != 2:
                 os.close(2)
                 os.dup2(out_w, 2)
             os.close(out_w)
             os.execvp(path, args)
         finally:
             # Should be _exit
             sys.exit(1)

Blah blah blah, I hereby release the above code into the public domain. 
  Most of the time I spent trying to get the above code to work I 
thought that stdout == 0, whoops.




From grobinson at transpose.com  Thu Jan 22 14:25:55 2004
From: grobinson at transpose.com (Gary Robinson)
Date: Thu, 22 Jan 2004 14:25:55 -0500
Subject: I support PEP 326
In-Reply-To: <1074798814.27007.148.camel@localhost.localdomain>
Message-ID: <BC358DF3.3C3C0%grobinson@transpose.com>

> What's PEP 326 again?
> 


Sorry... it's a proposal that Python incorporates two singleton constants
that represent top and bottom values: Max and Min might be the names.

Max would be bigger than anything it's compared to and Min would be smaller.
It would be very convenient -- in code I was writing a week or two ago I was
thinking "wouldn't it be great if python had..." exactly what PEP 326
proposes. It would have saved... well... a few minutes. But those add up!

The PEP document gives a lot of examples of why it would be good.

http://www.python.org/peps/pep-0326.html

--Gary

-- 
Putting http://wecanstopspam.org in your email helps it pass through
overzealous spam filters.

Gary Robinson
CEO
Transpose, LLC
grobinson at transpose.com
207-942-3463
Company: http://www.transpose.com
Blog:    http://www.garyrobinson.net


>




From gerrit at nl.linux.org  Mon Jan 26 16:12:34 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Mon, 26 Jan 2004 22:12:34 +0100
Subject: Deleting objects
In-Reply-To: <a33a46fe50e2ab07720a1118aa22d576@news.teranews.com>
References: <a33a46fe50e2ab07720a1118aa22d576@news.teranews.com>
Message-ID: <20040126211234.GA3721@nl.linux.org>

user at domain.invalid wrote:
> If I want to "reset" the object so that I get
> all of my memory back, can I just do:
> 
> 	del db

This may work, if you don't have other references.

> or maybe:
> 
> 	for t in db.tables:
> 		del t
> 	
> and expect that I have cleaned up all of my
> memory?
> 
> After writing this out, I see that the answer
> is clearly yes, but I will post anyway.

The answer is no, really :-)

'del' only removes a certain name from the current namespace. An object
is only destroyed when *all* references to it have been destroyed.
When you are looping over a certain collection, each time the body of
the loop is executed, the loop variable (here 't') gets redefined. So if
the referencecount to a certain object (db.tables[x]) is N, it will
become temporarily N+1 when looping over it: with 'del t', you destroy
the local name, so it becomes N again. Conclusion: This aint gonna work.

Because of this, it is generally better to explicitly kill/destroy/close
something. I don't know anything about databases, but maybe you want to
.close() it? 'del db' may work, but can be tricky if other objects, like
dicts, lists, sets or others, contain (nameless) references to the
object.

yours,
Gerrit.

-- 
This is my signature.
-- 
PrePEP: Builtin path type
    http://people.nl.linux.org/~gerrit/creaties/path/pep-xxxx.html
Asperger's Syndrome - a personal approach:
	http://people.nl.linux.org/~gerrit/english/



From ptmcg at users.sourceforge.net  Mon Jan 19 08:59:23 2004
From: ptmcg at users.sourceforge.net (Paul McGuire)
Date: Mon, 19 Jan 2004 13:59:23 GMT
Subject: Looking for very simple general purpose tokenizer
References: <bug9ij$30k$1@news.tudelft.nl>
Message-ID: <%oROb.92530$WS1.49742@fe1.texas.rr.com>

"Maarten van Reeuwijk" <maarten at remove_this_ws.tn.tudelft.nl> wrote in
message news:bug9ij$30k$1 at news.tudelft.nl...
> Hi group,
>
> I need to parse various text files in python. I was wondering if there was
a
> general purpose tokenizer available. I know about split(), but this
> (otherwise very handy method does not allow me to specify a list of
> splitting characters, only one at the time and it removes my splitting
> operators (OK for spaces and \n's but not for =, / etc. Furthermore I
tried
> tokenize but this specifically for Python and is way too heavy for me. I
am
> looking for something like this:
>
>
> splitchars = [' ', '\n', '=', '/', ....]
> tokenlist = tokenize(rawfile, splitchars)
>
> Is there something like this available inside Python or did anyone already
> make this? Thank you in advance
>
> Maarten
> -- 
> ===================================================================
> Maarten van Reeuwijk                        Heat and Fluid Sciences
> Phd student                             dept. of Multiscale Physics
> www.ws.tn.tudelft.nl                 Delft University of Technology
Maarten -
Please give my pyparsing module a try. You can download it from SourceForge
at http://pyparsing.sourceforge.net. I wrote it for just this purpose, it
allows you to define your own parsing patterns for any text data file, and
the tokenized results are returned in a dictionary or list, as you prefer.
The download includes several examples also - one especially difficult file
parsing solution is shown in the dictExample.py script. And if you get
stuck, send me a sample of what you are trying to parse, and I can try to
give you some pointers (or even tell you if pyparsing isn't necessarily the
most appropriate tool for your job - it happens sometimes!).

-- Paul McGuire

Austin, Texas, USA




From mirandacascade at yahoo.com  Sun Jan 25 16:41:57 2004
From: mirandacascade at yahoo.com (Miranda Evans)
Date: 25 Jan 2004 13:41:57 -0800
Subject: progress bar
References: <59e5b87.0401231329.6e084d6f@posting.google.com>
	<mailman.715.1074893879.12720.python-list@python.org>
	<9pwQb.5566$vy6.3518@newssvr29.news.prodigy.com>
Message-ID: <59e5b87.0401251341.6a95b17e@posting.google.com>

"Hoang" <tr at jotsite.com> wrote in message news:<9pwQb.5566$vy6.3518 at newssvr29.news.prodigy.com>...
> >
> > Try Venster:
> > http://venster.sourceforge.net
> >
> > IIRC the test_coolbar.py script includes a progress bar.
> 
> I wonder what possessed someone to start another GUI framework.  Aren't
> there more than enough existing ones?  The reasoning for it wasn't
> immediately apparent on the web page.
> 
> Hoang Do
> http://jotsite.com

Newbie questions...what is meant by the term 'GUI framework'?  I'm
aware of Tkinter, wxPython and PythonCard (which, I believe builds
from a wxPython foundation).  Also, it appears as though pywin.mfc has
GUI capabilities.  Are Tkinter, wxPython, PythonCard and pywin.mfc
considered GUI frameworks?  Based on the 'more than enough...' remark,
it sounds like there are several GUI frameworks out there...what are
some others?


From claird at lairds.com  Wed Jan 14 14:07:04 2004
From: claird at lairds.com (Cameron Laird)
Date: Wed, 14 Jan 2004 19:07:04 -0000
Subject: what is best for web development??
References: <f046efac.0401100358.5aa812a0@posting.google.com>
	<87oet9grqy.fsf@blakie.riol>
	<e9570f37.0401121052.ed79710@posting.google.com>
	<6ee58e07.0401140638.672d50a7@posting.google.com>
Message-ID: <100b4qoeeeq7d57@corp.supernews.com>

In article <6ee58e07.0401140638.672d50a7 at posting.google.com>,
Lothar Scholz <llothar at web.de> wrote:
>graham__fawcett at hotmail.com (Graham Fawcett) wrote in message
>news:<e9570f37.0401121052.ed79710 at posting.google.com>...
>> Wilk <wilkSPAM at OUTflibuste.net> wrote in message news:<87oet9grqy.fsf at blakie.
>
>> If it has to be a one-shot install, I would suggest a Web server
>> written in Python -- Medusa or Twisted, probably -- that you could
>> bundle with your Python app. Find a Web app framework that (a) works
>> on Medusa or Twisted and (b) has the templating features you
>> require/desire.
>
>I would not recommend this. A distribution with an own apache server
>seems to be the best. It is easy to hide the setup and the customers
>know that there is a good working technologie behind the scenes. And
>it can be managed by every normal administrator. This is a very
>important point for larger customers.
>
>I would recommend webware+Fun Form Kit+cheeta together with apache.

I'm unsure what you're recommending.  We're considering a self-contained
Web application, including the Web server itself.  Are you proposing:
1.  An installer which does a conventional Apache 
    installation, except with enough stuff confi-
    gured so it comes up in a safe state, PLUS
    a separate installation segment just for the
    Python-based part; or
2.  A custom installer which knows internal details
    of both Apache and the Python-based application?

What advantage do you see for either of these over the pure-Python ap-
proach suggested above?  Is your point that customers feel more 
comfortable with "Apache inside"?
-- 

Cameron Laird <claird at phaseit.net>
Business:  http://www.Phaseit.net


From h.b.furuseth at usit.uio.no  Fri Jan  9 11:08:15 2004
From: h.b.furuseth at usit.uio.no (Hallvard B Furuseth (nospam nospam))
Date: 09 Jan 2004 17:08:15 +0100
Subject: Program return value ?
References: <a4ALb.238706$vO5.9820692@twister1.libero.it>
Message-ID: <HBF.20040109l0wr@bombur.uio.no>

George Marshall wrote:

> Hi all, I'm trying to get the exit code of a program
> I want to exec in a python script in a portable manner.
> (...)
> The only problem is that it doesn't return negative values.

On a Unix system, the exit status from a program is one byte, which on
8-bit systems can have values from 0 to 255.  So if the program does
exit(-1), the exit status is (unsigned char)-1 == 255.

I don't know how this works on other operating system, but in any case I
imagine your problem is with the possible range of the exit status, not
with python.  Maybe your program should write a value to stdout (or some
other file) instead, so python could read the number.

-- 
Hallvard


From jjl at pobox.com  Thu Jan  8 13:33:57 2004
From: jjl at pobox.com (John J. Lee)
Date: 08 Jan 2004 18:33:57 +0000
Subject: win32: internet explorer automation problem
References: <btj74m$s1l$1@news.atman.pl>
Message-ID: <874qv670iy.fsf@pobox.com>

"mic" <aldo123 at onet.pl> writes:

> I'm currently trying to write an MSIE automation software and have run into
> such problem - have no idea how to take control of external popup windows -
> I use WebBrowser COM object and am able to catch the NewWindow2 event, but
> don't know how to change 'focus' to other than main explorer window. I tried
[...]

I guess you just need to use the usual browser object model (the one
exposed to JavaScript &c.) -- eg. window.focus(), window.blur().
IIRC, it's IHTMLDocument2, or similar, that you want.


John


From cartermark46 at ukmail.com  Mon Jan 19 11:51:46 2004
From: cartermark46 at ukmail.com (Mark Carter)
Date: 19 Jan 2004 08:51:46 -0800
Subject: best book: aint no such thing, and encouragement for old coots
References: <mailman.409.1074191840.12720.python-list@python.org>
	<bu8j31$s4c$1@scotsman.ed.ac.uk>
	<pan.2004.01.16.11.58.58.634101@yahoo.com>
	<m3vfn86vwn.fsf@pc150.maths.bris.ac.uk>
Message-ID: <d3c9c04.0401190851.5a2f006b@posting.google.com>

> Well, when you think you want a loop and before you know it you've
> written:
> 
>     (define (my-func arg1 arg2)
>       (define (inner var)
>          ...
> 
> it's probably time to come back to a less spartan programming
> language.  I mean, it's good to know that you *can* write loops that
> way, but that doesn't mean it actually *is* a good idea.

I'm experimenting with learning a functional language; and I know
almost zero about Scheme. I find it very difficult to understand the
structure of what's going on. I downloaded Standard ML (the New Jersey
offering), and find myself more inclined to dig into ML deeper; rather
than Scheme. ML does, at first glance, seem more readable.

I suppose that Schemers and Lispers take the attitude that a lack of
syntax is an advantage, because you can ultimately program in any
paradigm you wish. It's "just" a case of writing code that implements
the paradigm. I have also heard claims that the existence of
parantheses in s-exprs is a red herring as far as readability is
concerned.

Non Schemers/Lispers, on the other hand, presumably think that a
spoonful of syntactic sugar helps the medicine go down.

I suspect that if there really was One Obviously Right Way To Do It,
then we'd all be using it. No silver bullet, and all that.

I am sure, though, that there will be many people who disagree with my
sentiments.


From claird at lairds.com  Mon Jan 12 20:05:09 2004
From: claird at lairds.com (Cameron Laird)
Date: Tue, 13 Jan 2004 01:05:09 -0000
Subject: Why learn Python ??
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<877jzwg1v2.fsf@pobox.com>
Message-ID: <1006h25r6623m45@corp.supernews.com>

In article <877jzwg1v2.fsf at pobox.com>, John J. Lee <jjl at pobox.com> wrote:
			.
		[pages of marvelously
		precise analysis]
			.
			.
>Eiffel: Design by contract.  The book to read is Meyer's "Object-
> Oriented Software Construction".  Full of interesting stuff, if you can
> stand his self-importance ;-).
			.
			.
			.
Mostly I'm writing just to applaud--this post had a lot
of value to it.  The largest quibble I could find in its
scores of lines was the failure to mention that *OOSC*
is valuable reading for OO programmers working in *any*
language, not just Eiffel.  *OOSC* is like *SICP* in 
that regards; it towers not just over the competition, 
but also any apparent limit imposed by its language of
expression.
-- 

Cameron Laird <claird at phaseit.net>
Business:  http://www.Phaseit.net


From fumanchu at amor.org  Sun Jan  4 01:56:39 2004
From: fumanchu at amor.org (Robert Brewer)
Date: Sat, 3 Jan 2004 22:56:39 -0800
Subject: Recurring dates module [was: Project dream]
Message-ID: <DE1CF2B4FEC4A342BF62B6B2B334601E561BBF@opus.amorhq.net>

I offered:
> > > first attempt (*very* alpha); feedback/additions appreciated.
> > > 
> > > http://www.aminus.org/rbre/python/recur.py
> > > http://www.aminus.org/rbre/python/test_recur.py
> > 
> > I updated this today, including time functions in addition 
> > to the date functions and generally "filling in the corners".
> > I also included 
> > an interval calculation function for e.g., threading.Timer.

and eltronic replied:
> rats, datetime IIR is only py2.3 unless it already works in py2*
> or some kind soul has backported it ala sets and some of itertools.

Yes, sorry about that. Now that I'm fully 2.3 I didn't feel the need
(yet) to generalize the date types. I did try, however, to keep all of
the calls "method-centric"--that is, I don't ever check type/subclass
explicitly. Perhaps for older versions someone might write a wrapper for
mxDateTime which makes it behave like the new datetime module. I had
that mostly done at one time, then threw it away when datetime made it
into the Library.

> I envision a timer prog that wakes up every 45 or so seconds
> parses an event list and acts on those of the current minute.
> but something like recur would be needed for up/down counters.
> I guess all counters can derive their data from one main counter.
> the thought of starting each alarm in a thread maybe minutes 
> days or months in advance is not going to survive reboots well.

I considered that; it's one of the reasons that I decided to use
iteration/generators as the primary mode of operation, and kept the
declaration of recurrence in a vocabulary which is "rigorously
indeterminate". :) That is, the description of recurrence is ambiguous
until you provide a start date/end date to realize it. If your chain of
iteration breaks down, you should be able to pick it up again at any
point without modifying your description. It's also why the base
functionality of recur is available without use the Recurrence
class--that's just syntactic sugar over the bare generator functions.

I am now using recur with threading.Timer, by the way. You don't set up
all your Timers at once (one for each 45 seconds!?)--you code each Timer
so that, when it has completed its task, it starts the next Timer.
That's where recur.interval() comes in. Example:

import threading
import recur

class Worker(object):
    """Perform work on a schedule.
    
    You must subclass work(), which is called at each interval.
    """
    
    def __init__(self, recurrence=None):
        self.recurrence = recurrence
        if self.recurrence:
            # Throw away the first occurrence value,
            # which is almost always .now()
            self.recurrence.next()
    
    def motivate(self):
        """Start a new timed thread for work."""
        if self.recurrence:
            iv = recur.interval(self.recurrence)
            threading.Timer(iv, self._run).start()
    
    def _run(self):
        """Prepare for work."""
        self.work()
        self.motivate()
    
    def work(self):
        raise NotImplementedError



...which survives reboots just fine; just call motivate() on app
startup. Alternately, you could use a single main thread to calculate
the intervals and spawn new threads. That's why I specifically did not
embed threading implementations into recur--it's better to leave it
simpler and just let it play well with other existing modules which have
been written far better than mine.


Robert Brewer
MIS
Amor Ministries
fumanchu at amor.org



From shaleh at speakeasy.net  Sat Jan 10 03:03:39 2004
From: shaleh at speakeasy.net (Sean 'Shaleh' Perry)
Date: Sat, 10 Jan 2004 00:03:39 -0800
Subject: Straw poll on Python performance (was Re: Python is far from a
	top performer ...)
In-Reply-To: <3FFF26A1.943DEA84@engcorp.com>
References: <ryELb.238$tK2.228@amstwist00>
	<3fff234a$0$129$e4fe514c@dreader3.news.xs4all.nl>
	<3FFF26A1.943DEA84@engcorp.com>
Message-ID: <200401100003.39915.shaleh@speakeasy.net>

On Friday 09 January 2004 14:09, Peter Hansen wrote:
>
> Yes or no answers suffice, but feel free to follow up with a paragraph
> qualifying your answer (or quantifying it!).  :-)
>

not any longer.

As I learned on this and the tutor list, writing code in Pythonic style tends 
to also result in code being fast enough.  Most of my early problems resulted 
from trying to write C in Python.




From tim.golden at viacom-outdoor.co.uk  Thu Jan  8 10:43:50 2004
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Thu, 8 Jan 2004 15:43:50 -0000 
Subject: Calling a function dynamically
Message-ID: <F1921F85572CB04D9F55B14BDC76B3E44345D8@tdi_nt9.internal.viacom-outdoor.co.uk>



>-----Original Message-----
>From: JoeyTaj at netzero.com [mailto:JoeyTaj at netzero.com]
>Sent: 08 January 2004 15:42
>To: python-list at python.org
>Subject: Calling a function dynamically
>
>
>I would like to call a function whose name I supply at runtime.
>Something like this but it didn't work
>
>functionName = 'run'
>instance = ClassDef()
>args = [1, 2]
>
>#want the dynamic equivalant of
>#instance.run(*args)
>
>#This didn't work cause there was no __call__ attribute. Why?
>value = instance.__call__[functionName](*args)

The __call__ method of an instance only exists if defined
for its class by the developer, typically so that instances
of the class can behave as though they were functions.

If you're really set on doing what you describe, make
use of the getattr function. Something like this should work:

>>>
>>> class c:
...   def f (self, x, y): return x + y
...
>>> i = c ()
>>> print getattr (i, "f") (1, 2)
3
>>>

However, perhaps you don't really want to do it this way. A
common approach to this in Python is to use a dictionary
of functions. Doubtless there are others. If you could paint
a wider picture of what you're about, we could probably be
of more help.

TJG


________________________________________________________________________
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From eric.brunel at N0SP4M.com  Thu Jan 29 09:06:27 2004
From: eric.brunel at N0SP4M.com (Eric Brunel)
Date: Thu, 29 Jan 2004 15:06:27 +0100
Subject: popen2 with large input
References: <afc115ec.0401290511.3c3b2d40@posting.google.com>
Message-ID: <bvb3hr$73m$1@news-reader1.wanadoo.fr>

cherico wrote:
> from popen2 import popen2
> 
> r, w = popen2 ( 'tr "[A-Z]" "[a-z]"' )
> w.write ( t ) # t is a text file of around 30k bytes
> w.close ()
> text = r.readlines ()
> print text
> r.close ()
> 
> This simple script halted on 
> 
> w.write ( t )
> 
> Anyone knows what the problem is?

Yep: deadlock... Pipes are synchronized: you can't read from (resp. write to) a 
pipe if the process at the other end does not write to (resp. read from) it. If 
you try the command "tr '[A-Z]' '[a-z]'" interactively, you'll see that 
everytime tr receives a line, it outputs *immediately* the converted line. So if 
you write a file having several lines to the pipe, on the first \n, tr will try 
to write to its output, and will be stuck since your program is not reading from 
it. So it won't read on its input anymore, so your program will be stuck because 
it can't write to the pipe. And they'll wait for each other until the end of 
times...

If you really want to use the "tr" command for this stuff, you'd better send 
your text lines by lines and read the result immediatly, like in:

text = ''
for line in text.splitlines(1):
   w.write(line)
   w.flush()   # Mandatory because of output bufferization - see below
   text += r.readline()
w.close()
r.close()

It *may* work better, but you cannot be sure: in fact, you just can't know 
exactly when tr will actually output the converted text. Even worse: since 
output is usually buffered, you'll only see the output from tr when its standard 
output is flushed, and you can't know when that will be...

(BTW, the script above does not work on my Linux box: the first r.readline() 
never returns...)

So the conclusion is: don't use pipes unless you're really forced to. They're a 
hell to use, since you never know how to synchronize them.

BTW, if the problem you posted is your real problem, why on earth don't you do:
text = t.lower()
???

HTH
-- 
- Eric Brunel <eric dot brunel at pragmadev dot com> -
PragmaDev : Real Time Software Development Tools - http://www.pragmadev.com



From andymac at bullseye.apana.org.au  Wed Jan  7 05:02:46 2004
From: andymac at bullseye.apana.org.au (Andrew MacIntyre)
Date: Wed, 7 Jan 2004 21:02:46 +1100 (EST)
Subject: Iterating over a binary file
In-Reply-To: <btf5j8$6g26f$1@ID-46268.news.uni-berlin.de>
References: <btf5j8$6g26f$1@ID-46268.news.uni-berlin.de>
Message-ID: <20040107205635.W38088@bullseye.apana.org.au>

On Tue, 6 Jan 2004, Derek wrote:

> f = file(filename, 'rb')
> data = f.read(1024)
> while len(data) > 0:
>     someobj.update(data)
>     data = f.read(1024)
> f.close()
>
> The above code works, but I don't like making two read() calls.  Any
> way to avoid it, or a more elegant syntax?  Thanks.

I believe the canonical form is:

f = file(filename, 'rb')
while 1:
    data = f.read(1024)
    if not data:
        break
    someobj.update(data)
f.close()

This was also the canonical form for text files, in the case where
f.readlines() wasn't appropriate, prior to the introduction of file
iterators and xreadlines().

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



From tim.one at comcast.net  Fri Jan 30 14:11:28 2004
From: tim.one at comcast.net (Tim Peters)
Date: Fri, 30 Jan 2004 14:11:28 -0500
Subject: NEWLINE character problem
In-Reply-To: <013601c3e74c$c34bc780$2f01a8c0@dchirila>
Message-ID: <LNBBLJKPBEHFEDALKOLCEEJKIKAB.tim.one@comcast.net>

[Tim, suggests
    return s.replace('\r\n', '\n').replace('\r', '\n')
]

[Dragos Chirila]
> Thanks a LOT !!
>
> I will give it a try and see how it works... the problem is that I
> have realy big strings (more than 50000 characters)

Why is that a problem?  A 50 megabyte string might be a strain on some
modern machines, but 50K isn't much anymore.

There are many ways to approach this, but I'm not clear on what you want to
do.  For example, you can easily enough split on \r, \n and \r\n "in one
step":

>>> import re
>>> bylines = re.compile(r'\r\n?|\n')
>>> bylines.split("abc\r\ndef\rghi\njkl\n")
['abc', 'def', 'ghi', 'jkl', '']  # watch out for the trailing ''!
>>>

Or if you want to pick off a line at a time, use a generator:

import re
bylines = re.compile(r'\r\n?|\n')

def genlines(s):
    i, n = 0, len(s)
    while i < n:
        m = bylines.search(s, i)
        if m:
            start, finish = m.span(0)
            yield s[i:start]
            i = finish
        else:
            break

and then

>>> for line in genlines("abc\r\ndef\rghi\njkl\n"):
...     print "<" + line + ">"
<abc>
<def>
<ghi>
<jkl>

Maybe you want a line end character on each piece too -- don't know, but it
should be easy to fiddle to taste.




From joe at notcharles.ca  Sun Jan 25 20:53:31 2004
From: joe at notcharles.ca (Joe Mason)
Date: Mon, 26 Jan 2004 01:53:31 GMT
Subject: perl bug File::Basename and Perl's nature
References: <7fe97cc4.0401242131.22acf485@posting.google.com>
	<tmqa10d6a542ma6k1ao6tnupvj0gbtser7@4ax.com>
Message-ID: <slrnc18r49.14j.joe@gate.notcharles.ca>

In article <tmqa10d6a542ma6k1ao6tnupvj0gbtser7 at 4ax.com>, Michele Dondi wrote:
> Also, you may have noticed it, but this is a discussion group about
> *Perl* and people here is highly likely to be fond of Perl, appreciate
> its "nature" and so on... so what did you expect to receive as an
> answer to your post?

No it's not.  This is a newsgroup about Ruby.  And that's a newsgroup
about Python.  And that over there's a newsgroup about Scheme.

Only one of these groups is actually about Perl, so I've set the
followups there.  The troll is actually on-topic there.  Please keep
your replies there, too.

Joe


From jepler at unpythonic.net  Wed Jan 21 20:25:16 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Wed, 21 Jan 2004 19:25:16 -0600
Subject: an example of a singleton design pattern in python?
In-Reply-To: <bun622$e8i$1@panix1.panix.com>
References: <hc63caapdui.fsf@praxis.lsil.com> <bun622$e8i$1@panix1.panix.com>
Message-ID: <20040122012516.GB29212@unpythonic.net>

On Wed, Jan 21, 2004 at 07:38:26PM -0500, Aahz wrote:
> * Within a single module, use a global class as your singleton object.

This is a little bit inconvenient, because you must either mark all
methods as staticmethod (and refer to the class by name), or you must
mark all methods as classmethod.

This metaclass can help.  It makes all functions into staticmethods at
the time the class is created:

    from types import FunctionType

    class SingletonClassMeta(type):
	def __new__(cls, name, bases, dict):
	    for k, v in dict.iteritems():
		if isinstance(v, FunctionType):
		    dict[k] = classmethod(v)
	    return (super(SingletonClassMeta, cls).
			__new__(cls, name, bases, dict))

    class Singleton(object):
	"""All methods in a Singleton object are made class methods"""
	__metaclass__ = SingletonClassMeta

Probably __init__ should be made to raise an exception (RuntimeError,
"Singletons cannot be instantiated"))...

An example:
>>> class C(Singleton):
...     x = []
...     def f(self): return self.x
...     def g(self, arg): self.x.append(arg)
... 
>>> C.f()
[]
>>> C.g(3)
>>> C.f()
[3]



From mcfletch at rogers.com  Sat Jan 10 11:48:00 2004
From: mcfletch at rogers.com (Mike C. Fletcher)
Date: Sat, 10 Jan 2004 11:48:00 -0500
Subject: Debugging Python
In-Reply-To: <3fffbe99.486050433@news.blueyonder.co.uk>
References: <mailman.215.1073656414.12720.python-list@python.org>	<3FFEBDBC.2F9DFD03@engcorp.com>	<xqxllohbejp.fsf@cola2.ca.boeing.com>
	<3fffbe99.486050433@news.blueyonder.co.uk>
Message-ID: <40002CC0.3020207@rogers.com>

Alan Gauld wrote:

>On Fri, 9 Jan 2004 10:29:46 GMT, Harry George
><harry.g.george at boeing.com> wrote:
>  
>
<think this was actually Peter in here>

>>>I'm not sure about others, but when I design and code using test-driven 
>>>development (TDD), I tend not to need to debug almost ever.  
>>>      
>>>
...

>Interesting comments. How do people generally perform these tests
>then? My primary test tool, for low level testing, is usually the
>debugger. Batch mode debugging is something I've been doing since
>I worked on VAX/VMS systems and its seems as natural as breathing
>to me. Its easy to save a test session and run it later etc. How
>else do you test code at a low level?
>  
>
Standard module unittest, although lots of people like doctest (closer 
in spirit to your debugger debugging traces).  The TDD/Agile people seem 
generally to use the more formal unittest mechanism (which is more 
appropriate when you're writing the test first), while doctest 
encourages you to write something closer to a "regression" test, where 
you're just testing that what works now isn't going to fail in the 
future by recording side-effects (debugger/prompt output) and comparing 
them to the later version's side-effects.

unittest testing is a rather involved thing, there's all sorts of 
test-framework "fixtures", (e.g. MockObjects), that help you run a 
particular method of a particular object all by its lonesome to test 
that it does everything it is supposed to do and nothing it's not 
supposed to do.  The entire test-suite is supposed to be run regularly 
(at least daily & before checkins), with local tests (those for the area 
on which you are working) being run every 30 seconds or so as you write 
new tests (and then the code to fix the breakage of those tests (and 
that only if the test is actually broken with the current code-base)).

TDD (test-driven development) tends to reduce/eliminate the use of the 
debugger because of that (automated) frequency of test-code-runs.  
You're testing small blocks of code with tests whose very name says 
what's failed about the block of code, so as soon as you screw something 
up red lights start flashing telling you what you just did wrong.  Given 
that you're also *working* on very small code blocks, you generally know 
what you just did (you aren't supposed to be coding large blocks of code 
at once), and the failed tests' names tell you what went wrong (and 
where) with what you just wrote.

I've only been able to rigorously apply TDD in one or two projects so 
far.  The fit for GUI and graphics code isn't spectacular (IMO).  
Command-line, library, and network apps (with the appropriate test 
fixtures (efficient use of which seems to be key to any serious use of 
TDD)) seem to be a better fit.

Have fun,
Mike

_______________________________________
  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://members.rogers.com/mcfletch/






From jjl at pobox.com  Fri Jan  9 09:57:16 2004
From: jjl at pobox.com (John J Lee)
Date: Fri, 9 Jan 2004 14:57:16 +0000 (GMT)
Subject: win32: internet explorer automation problem
In-Reply-To: <HEEHKDGJBOEOEAFOJMDBKENBCEAA.michal.zylinski@atm.com.pl>
References: <HEEHKDGJBOEOEAFOJMDBKENBCEAA.michal.zylinski@atm.com.pl>
Message-ID: <Pine.LNX.4.58.0401091452550.910@alice>

On Fri, 9 Jan 2004, [iso-8859-2] Micha? ?yli?ski wrote:

> > Well, it's got to be in there somewhere (not necessarily IHTMLDocument --
> > there are a bunch of interfaces whose names I don't remember).
>
> Sure, I hope so, but am afraid that WebControl alone doesn't offer it (or at
> least not straight from the box). Anyway thx for your help.

The "WebBrowser Control" means IWebBrowser2, which is just a little part
of SHDOCVW / MSHTML.  But I believe JavaScript, VBScript etc. all get
their abilities pretty directly via the COM interfaces.  That's why it was
possible to add Python as a "first-class" scripting language, on a par
with JavaScript etc. (or JScript, strictly).  So -- IIUC -- it really does
have to be in there, and it should be easy to find, too (in some sense of
"easy" ;-).


John



From peter at engcorp.com  Thu Jan 15 11:42:35 2004
From: peter at engcorp.com (Peter Hansen)
Date: Thu, 15 Jan 2004 11:42:35 -0500
Subject: Printing to console, no scroll
References: <mailman.364.1074102636.12720.python-list@python.org>
	<20040114190350.06766.00000031@mb-m21.aol.com>
Message-ID: <4006C2FB.B377BE82@engcorp.com>

PiedmontBiz wrote:
> 
> Sorry for my post with all the ansi.py code.
> 
> I forgot the website I got it from.

Google is your friend (along with five seconds of effort):

  http://www.demonseed.net/~jp/code/ansi.py

-Peter


From sridharinfinity at yahoo.com  Sun Jan 18 09:25:10 2004
From: sridharinfinity at yahoo.com (Sridhar R)
Date: 18 Jan 2004 06:25:10 -0800
Subject: Using python for _large_ projects like IDE
Message-ID: <930ba99a.0401180625.5863acd4@posting.google.com>

Hi,

I am a little experienced python programmer (2 months).  I am somewhat
experienced in C/C++.  I am planning (now in design stage) to write an
IDE in python.  The IDE will not be a simple one.  I had an idea of
writing the IDE in C/C++, as it is a big project, bcoz of the
following

1. if python is used, then the memory required for running the IDE
will be high.
2. if pure python is used, the IDE will be slower.

I'm not sure whether they are true.

Then I thought of using python for 90% of the code and using C for
other performance critical part.  But the problem is in identifying
the performance critical code.  People suggest to start with pure
python and then _recode_ the performance critical code after profiling
the original code.  But I fear whether there will be a conflit in say
data structures.  Not yet expert in extending/embedding python.
Are there any ways to forsee the performance critical parts?

Also, any suggestions on reducing memory usage of big applications
written in python?


From swalters_usenet at yahoo.com  Thu Jan  8 19:15:47 2004
From: swalters_usenet at yahoo.com (Samuel Walters)
Date: Fri, 09 Jan 2004 00:15:47 GMT
Subject: What psyco is goot at [Was: Rookie Speaks]
References: <mailman.198.1073602275.12720.python-list@python.org>
Message-ID: <pan.2004.01.09.00.14.30.629722@yahoo.com>

|Thus Spake Delaney, Timothy C (Timothy) On the now historical date of
Fri, 09 Jan 2004 09:51:07 +1100|
> As an example, check these pystone results (Python 2.3.3, psyco 1.1.1,
> Windows 2K SP4). Note I've upped the number of passes ...
> 
> The benchmarks with `from psyco.classes import __metaclass__` are
> interesting - they're counter to what one would expect from the docs -
> increased memory usage and decreased performance. Is this a known thing
> Armin, or is something going screwy on my box? It's happening
> consistently.
> 
> Note that psyco.profile() depends heavily on how your code works. I've got
> one piece of code that performs approx 5 times better with psyco.full(),
> but actually performs worse with psyco.profile() than without psyco at
> all!

No matter how badly we wish optimization were a theoretical science, I
think it will always be mostly empirical.  The bottlenecks always seem to
show up in the most unintuitive places.  You can make some educated
guesses based on the Big O nature of your algorithms, but in the end, you
just have to field test.

> 
> Unfortunately, I can't make it available, but it's a single pass over a
> file (line by line), matching and extracting data using various regexes,
> writing lots of other files, then iterating over the other files to
> produce even more files. The datasets tend to be very large - 500MB+.
> 
> The main functions only get called one time each (which is probably the
> killer) and the bulk of the work is done inside while loops in those
> functions. I suspect that if I moved the contents of the main while loops
> to their own functions psyco.profile() would do a lot better.

It seems you've got two forces pulling in opposite directions here:
Function calls are expensive in Python and
Psyco only optimizes functions as a whole.

I've heard of a tool, I believe it's called HotSpot, that will help you
figure out which lines of code, not functions, are the most expensive for
you.  You could then see if wrapping those lines in a function and binding
it with psyco would give you a gain in performance.  You might look into
it.  I haven't researched it, know nothing about it, and it's pretty low
on my to-do list ATM, but it might help you with your needs.


Sam Walters.

-- 
Never forget the halloween documents.
http://www.opensource.org/halloween/
""" Where will Microsoft try to drag you today?
    Do you really want to go there?"""



From premshree_python at yahoo.co.in  Wed Jan 28 12:13:53 2004
From: premshree_python at yahoo.co.in (=?iso-8859-1?q?Premshree=20Pillai?=)
Date: Wed, 28 Jan 2004 17:13:53 +0000 (GMT)
Subject: Distributing Python programs
In-Reply-To: <4017abb7$0$9394$ed9e5944@reading.news.pipex.net>
Message-ID: <20040128171353.37596.qmail@web8305.mail.in.yahoo.com>

> Can I install Python on a networked server and have
> any user run Python
> programs without having to go through the 9Mb client
> install?
Yes. The users will only have to login remotely to the
server, and can run Python.

> What are my options for distributing Python programs
> to my users?
If you are creating standalone apps, you could
consider distributing them as the py objects or
executables (for Windows). See py2exe:
http://starship.python.net/crew/theller/py2exe/

Hope this helps.

-Premshree

 --- NEWS <gsmith at oxfam.org.uk> wrote: > Can I install
Python on a networked server and have
> any user run Python
> programs without having to go through the 9Mb client
> install?
> 
> What are my options for distributing Python programs
> to my users?
> 
> Thankyou to anyone who can help.
> 
> Graham
> 
> 
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list 

=====
-Premshree
[http://www.qiksearch.com/]

________________________________________________________________________
Yahoo! India Mobile: Download the latest polyphonic ringtones.
Go to http://in.mobile.yahoo.com



From http  Sat Jan 31 19:29:48 2004
From: http (Paul Rubin)
Date: 31 Jan 2004 16:29:48 -0800
Subject: OT: why do web BBS's and blogs get so slow?
References: <7xbrojk9rk.fsf_-_@ruckus.brouhaha.com>
	<iaXSb.5081$uM2.2552@newsread1.news.pas.earthlink.net>
Message-ID: <7xfzdvej5v.fsf@ruckus.brouhaha.com>

y


From peter at engcorp.com  Fri Jan  9 09:23:55 2004
From: peter at engcorp.com (Peter Hansen)
Date: Fri, 09 Jan 2004 09:23:55 -0500
Subject: Python equivalent of settimeofday()?
References: <781faf41.0401081838.10de95c9@posting.google.com>
Message-ID: <3FFEB97B.9B957AD5@engcorp.com>

"Narendra C. Tulpule" wrote:
> 
>   do you know how (or if) I can set time on a system using Python?
> i.e. is there an equivalent of the shell's 'date -s' or the system
> call settimeofday()?

Maybe some variation on this?

import os,time

def settimeofday(tt):
    ts = time.ctime(tt)
    os.system("/sbin/hwclock --set '--date=%s'"% ts)
    os.system("/sbin/hwclock --hctosys")


??  

Note the final line, which retrieves the time from the hardware so the
system clock is also updated.

-Peter


From maxm at mxm.dk  Wed Jan 14 02:54:42 2004
From: maxm at mxm.dk (Max M)
Date: Wed, 14 Jan 2004 08:54:42 +0100
Subject: Does anyone else not find the fun in programming...?
In-Reply-To: <d232c5e.0401130823.27fd26ff@posting.google.com>
References: <d232c5e.0401130823.27fd26ff@posting.google.com>
Message-ID: <4004f5ac$0$69931$edfadb0f@dread12.news.tele.dk>

Chris Lyon wrote:
> I find python very effective as a language and can generally project
> most of my hazy thoughts into it. But FUN !!!


Perhaps you are working on the wrong projects?

I program for work. That isn't fun. Well it's not bad either.

But I also have a hobby creating music with algorithmic composition 
techniques in Python. And that is *fun*

Creating basic libraries is also fun. Spending all the time you need to 
get them "just right"

Combining programming with some kind of hobby hardware can also be fun.



regards Max M



From miki.tebeka at zoran.com  Tue Jan  6 02:54:46 2004
From: miki.tebeka at zoran.com (Miki Tebeka)
Date: 5 Jan 2004 23:54:46 -0800
Subject: Probles parsing a text file
References: <LoOdnYV4RNhliWeiSa8jmw@karoo.co.uk>
Message-ID: <4f0a9fdb.0401052354.549cece4@posting.google.com>

Hello, 

> heres my text file(well the first two lines of it)
> 
> #########################################
> #            Default BMUS server CFG file                   #
...
> i heres the script that im using to parse the file
... 
Try:
#!/usr/bin/env python
try:
    fo = open("server.cfg")
    print "Reading server CFG file"
    for line in fo:
        line = line.strip() # Strip white spaces
        if (not line) or line.startswith("#"):
            continue
        eval(line) # *** UNSAFE ***
        print "line executed"
except IOError, e:
    print "Can't read server CFG (%s)" % e

Note that using "eval" is very unsafe. Someone might place
'shutil.rmtree("/")' inside the CFG file.

> many thnas for your help
No problem.

Miki


From skip at pobox.com  Wed Jan 21 15:32:26 2004
From: skip at pobox.com (Skip Montanaro)
Date: Wed, 21 Jan 2004 14:32:26 -0600
Subject: SystemError while execing bad code
In-Reply-To: <m3hdyp5ae5.fsf@pc150.maths.bris.ac.uk>
References: <mailman.543.1074599606.12720.python-list@python.org>
	<m3hdyp5ae5.fsf@pc150.maths.bris.ac.uk>
Message-ID: <16398.57818.351244.255642@montanaro.dyndns.org>


    Gerrit> exec CodeType(0,0,0,0,"",(),(),(),"","",0,"")
    ...
    Gerrit> But I guess this is a case of "so don't do it" :-)?

    Michael> Definitely.  It's easy enought to crash the interpreter this
    Michael> way (think LOAD_CONST 30000, for just one easy way).

In fact, help(types.CodeType) describes it thusly:

    Create a code object.  Not for the faint of heart.

Should this sort of stuff be published on the Wiki?

Skip



From inyeol.lee at siimage.com  Tue Jan 27 13:55:55 2004
From: inyeol.lee at siimage.com (Inyeol Lee)
Date: Tue, 27 Jan 2004 10:55:55 -0800
Subject: Problem with RE matching backslash
In-Reply-To: <9114f8b2d460bc916150d0ae96a69ea7@news.meganetnews.com>
References: <7b5e60b8754ab5afcea58d4ecc8b8849@news.meganetnews.com>
	<bv60fk$lu8$05$1@news.t-online.com>
	<9114f8b2d460bc916150d0ae96a69ea7@news.meganetnews.com>
Message-ID: <20040127185555.GF13453@siliconimage.com>

On Tue, Jan 27, 2004 at 03:31:24PM +0000, Ladv?nszky K?roly wrote:
> Thanks for your quick and very helpful reply, Peter.
> What is still not clear to me is why  the search examples work and yield
> 'm'.
> 
> K?roly

Python and SRE have different convention for handling unrecognized
escape sequence, such as "\\m".

>From Section 2.4.1 String literals in Python 2.3.3 Reference Manual;
"""
Unlike Standard  , all unrecognized escape sequences are left in the
string unchanged, i.e., the backslash is left in the string. (This
behavior is useful when debugging: if an escape sequence is
mistyped, the resulting output is more easily recognized as broken.)
"""

>From Section 4.2.1 Regular Expression Syntax in Python 2.3.3 Lib Reference;
"""
The special sequences consist of "\" and a character from the list
below. If the ordinary character is not on the list, then the resulting
RE will match the second character. For example, \$
matches the character "$". 
"""

So, your 3rd example

    print re.search('\\m', '\m').group(0)

is actually the same as

    print re.search('m', '\\m').group(0)

, thus returns 'm'.

-Inyeol Lee



From mirko-lists at zeibig.net  Thu Jan  8 08:03:47 2004
From: mirko-lists at zeibig.net (Mirko Zeibig)
Date: Thu, 08 Jan 2004 14:03:47 +0100
Subject: Descriptor puzzlement
In-Reply-To: <vvqjj92il4o1d0@news.supernews.com>
References: <vvqjj92il4o1d0@news.supernews.com>
Message-ID: <btjkfp$7vu2v$1@ID-198792.news.uni-berlin.de>

John Roth said the following on 01/08/2004 01:34 PM:
> Using Python 2.2.3, I create this script:
> 
> [beginning of script]
> 
> class AnObject(object):
>     "This might be a descriptor, but so far it doesn't seem like it"
>     def __init__(self, somedata):
>         self.it = somedata
>     def __get__(self, obj, type=None):
>         print "in get method"
>         return self.it
>     def __set__(self, obj, it):
>         print "in set method"
>         self.somedata = it
>         return None
> ##    def foo(self):
> ##        return 1
Hm, I don't know __set__ and __get__, there are __getattr__ (or 
__getattribute__) and __setattr__ for dynamically assigning attributes. 
Or take a look at properties 
(http://www.python.org/2.2/descrintro.html#property)

> class AnotherObject(object):
>     def __init__(self):
>         self.prop = AnObject("snafu")
> 
> myClass = AnotherObject()
> print myClass.prop
Now just do:
print id(myClass.prop) to see the internal reference.

> myClass.prop = "foobar"
Here you bind an immutable string-object to myClass.prop, the object of 
type AnObject you have bound before has no further references in the 
code and will be garbage collected.

If you create a destructor for AnObject:

   def __del__(self):
     print "%s.__del__" % self

you will see that this happens immediately.

> print myClass.prop

Regards
Mirko


From mike at mhuffman.com  Sat Jan 17 16:13:51 2004
From: mike at mhuffman.com (Mike Huffman)
Date: 17 Jan 2004 13:13:51 -0800
Subject: Need to get 8.3 path on Windows
References: <buan2h$g0e$2@news.Stanford.EDU>
	<100hpmrm74ah548@corp.supernews.com>
Message-ID: <3ae9c53d.0401171313.3d49b43@posting.google.com>

> >>> import win32api
> >>> win32api.GetShortPathName( "C:\Program Files\Internet Explorer" )
>  'C:\\PROGRA~1\\INTERN~1'
> >>>

Definitely the way to go *IF* you know the user will have Windows
Extensions installed. However, if you can only count on a "standard"
Python installation you can use the system FOR command on Windows
2K/XP:

  import sys, os
  
  if os.environ['OS'] != 'Windows_NT':
      print sys.argv[0], 'requires Windows 2000 or Windows XP'
      sys.exit(1)
  
  long_name = 'C:\\Documents and Settings\\All Users\\Start Menu' +
              '\\Windows Update.lnk'
  print '%-16s%s' % ('long_name: ', long_name)
  
  for_cmd = 'for %I in ("' + long_name + '") do echo %~sI'
  print '%-16s%s' % ('for_cmd: ', for_cmd)
  
  p = os.popen(for_cmd)
  short_name = p.readlines()[-1]    # last line from for command
  
  if p.close():
      print 'Error calling shell command "for"'
  else:
      print '%-16s%s' % ('short_name: ', short_name)

If you need to support Windows 98 let me know; I have a script
(VBScript) that converts long names to short names using Windows
Script Host which I call with popen() as above. Maybe someone has a
better way to do it for Win98 without Python Win32 extensions.

Mike


From swalters_usenet at yahoo.com  Mon Jan  5 13:39:00 2004
From: swalters_usenet at yahoo.com (Samuel Walters)
Date: Mon, 05 Jan 2004 18:39:00 GMT
Subject: Progress indicator during FTP upload
References: <bt9m62$15te$1@ns.felk.cvut.cz>
	<20040104221012.0cc111a3.no.spam@box>
Message-ID: <pan.2004.01.05.18.37.49.830340@yahoo.com>

|Thus Spake Christophe Delord On the now historical date of Sun, 04 Jan
2004 22:10:12 +0100|
> To update my web site I wrote a script in wich I have overriden ftplib.FTP
> to print a dot when a block of bytes is sent. Here is my dot_FTP class :
(code snipped)
Combine with this recipe:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/168639
Salt to taste and serve with red wine.

-- 
Never forget the halloween documents.
http://www.opensource.org/halloween/
""" Where will Microsoft try to drag you today?
    Do you really want to go there?"""



From eurleif at ecritters.biz  Tue Jan 27 21:59:46 2004
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Wed, 28 Jan 2004 02:59:46 GMT
Subject: Upgrading Python on Red Hat 7.2?
Message-ID: <CAFRb.318$VP1.307693@newshog.newsread.com>

I have an ancient server with Red Hat 7.2 and Python 1.5.2. I want to 
install mod_python, but I'll need a version of python from some time 
after the stone age to do that. Up2date is broken (missing Python 
module, go figure), so I can't use that. The latest RPMs seem to be for 
Red Hat 9, will they work with 7.2? If not, will building from source 
make versioned binaries only (/usr/bin/pythonX.X instead of 
/usr/bin/python)?



From alan_salmoni at yahoo.com  Mon Jan 19 01:11:13 2004
From: alan_salmoni at yahoo.com (Alan James Salmoni)
Date: 18 Jan 2004 22:11:13 -0800
Subject: Python used in Freedom Force
References: <4BDF2B3C-464A-11D8-B48D-000A959CB2EC@netmail.to>
	<mailman.392.1074170206.12720.python-list@python.org>
	<4006911e$0$327$e4fe514c@news.xs4all.nl>
	<b68f71a7.0401180343.579a8568@posting.google.com>
	<bue8b9$mpu$1@panix1.panix.com>
Message-ID: <b68f71a7.0401182211.3e511dab@posting.google.com>

aahz at pythoncraft.com (Aahz) wrote in message news:<bue8b9$mpu$1 at panix1.panix.com>...
> In article <b68f71a7.0401180343.579a8568 at posting.google.com>,
> Alan James Salmoni <alan_salmoni at yahoo.com> wrote:
> >
> >Perhaps all this stuff could be put onto the "Python Success Stories"
> >part of the python.org website? It's not public, but if the language
> >is clearly being used...
> 
> Currently, due to the load on the webmasters and the available time,
> http://www.pythonology.com/
> is better maintained.  Send e-mail to the pythonology webmaster to get
> something included.

Thanks Aahz - I'll get onto it right away!

Alan.


From rob02omni at vodafone.it  Mon Jan 19 04:14:39 2004
From: rob02omni at vodafone.it (Roberto)
Date: Mon, 19 Jan 2004 10:14:39 +0100
Subject: How robust  is embedding??
References: <bu5ngq$2im$1@fata.cs.interbusiness.it> <874quuthx1.fsf@pobox.com>
Message-ID: <bug6nk$mfh$1@fata.cs.interbusiness.it>

Thanks for reply and info John.

-- 
Rob

"John J. Lee" <jjl at pobox.com> ha scritto nel messaggio
news:874quuthx1.fsf at pobox.com...
> "Roberto" <rob02omni at vodafone.it> writes:
>
> > I know that surely depend on how robust is my script just wondering if
> > anyone is using this in production.
>
> Yes, people do.  Eg., see recent thread on commercial games that embed
> Python.  Generally, people tent to prefer to extend Python rather than
> embed it, though.
>
>
> John




From aldo123 at onet.pl  Fri Jan  9 04:57:09 2004
From: aldo123 at onet.pl (mic)
Date: Fri, 9 Jan 2004 10:57:09 +0100
Subject: win32: internet explorer automation problem
References: <btj74m$s1l$1@news.atman.pl> <874qv670iy.fsf@pobox.com>
Message-ID: <btlttv$1bf0$1@news.atman.pl>

> I guess you just need to use the usual browser object model (the one

> exposed to JavaScript &c.) -- eg. window.focus(), window.blur().

> IIRC, it's IHTMLDocument2, or similar, that you want.

I don't think this could work - my piece of code is assumed to be completely
separated from the HTML itself. It just 'watches' the MSIE behaviour and
simulates the user work. AFAIK opening popup creates another MSIE instance,
so I simply loose the context. It'd be perfect if external window will be
treated using IHTMLDocument object model, but window object works according
to this excerpt from MSDN like this:

'Typically, the browser creates one window object when it opens an HTML
document. However, if a document defines one or more frames (that is,
contains one or more frame or iframe tags), the browser creates one window
object for the original document and one additional window object for each
frame'

So there is no easy way of doing it like
Document.NewWindow.documentelement.outerHTML. There is some ppDisp parameter
within OnNewWindow2 event, that looks like some sort of way to go...

Michal




From rupole at hotmail.com  Tue Jan 20 01:29:41 2004
From: rupole at hotmail.com (Roger Upole)
Date: Mon, 19 Jan 2004 22:29:41 -0800
Subject: problems with os.path.isdir on windows shares (i've read the
	FAQ)
References: <4489035c.0401161545.75b63ce@posting.google.com>
	<bua2ud$cm7$1@news-reader2.wanadoo.fr>
	<4489035c.0401190821.bf3ff14@posting.google.com>
Message-ID: <400c9cda_3@127.0.0.1>

This used to work (1.5.2 maybe ?), and I got bit pretty bad when it stopped.
Had a small function to copy a file to either a full path or into a
directory,
as determined by os.path.isdir.  After upgrading, the results weren't pretty
the
first time I tried to copy a file to a share.
I had to replace os.path.isdir(pathname) with
win32file.GetFileAttributes(pathname) & win32con.FILE_ATTRIBUTE_DIRECTORY
to get around it.
          Roger

"todd smith" <todcsmith at yahoo.com> wrote in message
news:4489035c.0401190821.bf3ff14 at posting.google.com...
> "Michel Claveau/Hamster" <No.Spam.mc at No.Spam.mclaveau.No.Spam.com> wrote
in message news:<bua2ud$cm7$1 at news-reader2.wanadoo.fr>...
> > Hi !
> >
> > \\\\ren\\backup   is perhaps no a directory, but the name of a shared
> > ressource.
> >
> >
> >
> > @-salutations
>
>
> i'm a bit confused as to what you mean by a shared resource. but
> \\ren\backup is definately a shared directory, i mkdir'd it myself :)




From skip at pobox.com  Tue Jan  6 11:34:05 2004
From: skip at pobox.com (Skip Montanaro)
Date: Tue, 6 Jan 2004 10:34:05 -0600
Subject: RELEASED: allout-vim 031229
In-Reply-To: <87d69xawvv.fsf@pobox.com>
References: <mailman.26.1072753109.8134.python-list@python.org>
	<pan.2003.12.31.05.47.10.999283@yahoo.com>
	<mailman.70.1072876780.8134.python-list@python.org>
	<pan.2003.12.31.14.49.29.838030@yahoo.com>
	<mailman.72.1072888283.8134.python-list@python.org>
	<yfsr7ykb8a4.fsf@black132.ex.ac.uk>
	<mailman.17.1072988207.12720.python-list@python.org>
	<87d69yqsos.fsf@pobox.com>
	<95aa1afa.0401060522.630e5cbb@posting.google.com>
	<87d69xawvv.fsf@pobox.com>
Message-ID: <16378.58237.898620.619660@montanaro.dyndns.org>


    John> michele.simionato at poste.it (Michele Simionato) writes:
    >> jjl at pobox.com (John J. Lee) wrote in message news:<87d69yqsos.fsf at pobox.com>...
    >> > Fran?ois Pinard <pinard at iro.umontreal.ca> writes:
    >> > No, actually, a *real* OT comment: I'm pretty sure I've seen two big
    >> > pieces of code, by two French authors, in which the word "eventually"
    John> [...]
    >> "Eventuellement" (or the Italian "eventualmente")
    >> means "possibly", not "eventually".

    John> Ah, of course.  I was sure I'd looked for a false friend in my
    John> French dictionary, but I guess I can't have done...

Interesting thread I suppose, but in all the messages which have floated by
in this thread I never saw a description of what "allout" format is.  Can
someone describe it or refer me to a URL which does?

Thx,

Skip




From reply.in.the.newsgroup at my.address.is.invalid  Fri Jan 16 16:07:27 2004
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Fri, 16 Jan 2004 22:07:27 +0100
Subject: Supressing PyChecker warnings
References: <mailman.449.1074286819.12720.python-list@python.org>
Message-ID: <rgkg00t62t6puhcj45g5001s7edc1oq6q8@4ax.com>

Jp Calderone:
>  When using PyChecker on a project which uses bsddb, dozens of messages
>like the following are reported:
>
>warning: couldn't find real module for class
>         bsddb._db.DBAccessError (module name: bsddb._db)

I saw the same thing with PyPgSQL.

>  I've looked through the PyChecker usage information, documentation, and
>browsed some of the source, but I can't find any options for supressing
>this.

Same here. I'm not even sure if it needs to be supressed, rather than
solved.

-- 
Ren? Pijlman


From jepler at unpythonic.net  Sat Jan 17 18:26:26 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Sat, 17 Jan 2004 17:26:26 -0600
Subject: Best way to do this?
In-Reply-To: <100jg9er3qak890@corp.supernews.com>
References: <100jg9er3qak890@corp.supernews.com>
Message-ID: <20040117232625.GA23442@unpythonic.net>

def getpass(password, count=3):
	for i in range(count):
		p = raw_input("Password: ")
		if p == password: return 1
	return 0

No need to initialize count to 0 and use a while loop, use a "for" loop
instead.  No need to initialize password above the loop (and if you had
to, use None instead of "null"), and no need to set count to 3 when the
correct password is entered---just use return or break.

Jeff



From marco at bubke.de  Sun Jan  4 14:19:02 2004
From: marco at bubke.de (Marco Bubke)
Date: Sun, 04 Jan 2004 20:19:02 +0100
Subject: Scoped Lock
Message-ID: <bt9ovs$p92$1@graf.cs.uni-magdeburg.de>

Hi

There is the Lock object in the threading module.
But there is no medode there I could aquire a scoped
lock like:

mutex = threading.Lock()
my_lock = mutex.scoped_acquire() # maybe scoped_lock()
#now this stuff is locked

del mylock

#the lock is released.

def do_domething:
  my_lock = mutex.scoped_acquire()
  #now this stuff is locked  
  #the lock is released after its out of scope


I have written this my own but I'm not sure there is a drawback
because its looks so convinent. So I wonder why its not in 
the module?

thx

Marco


From jjl at pobox.com  Sun Jan 11 09:37:42 2004
From: jjl at pobox.com (John J. Lee)
Date: 11 Jan 2004 14:37:42 +0000
Subject: OT: Of C,
	Fortran and pointer aliasing Was: Python if far from a top
	performer...
References: <ryELb.238$tK2.228@amstwist00> <btn5db$2f8$1@absinth.dialog.net.pl>
	<pan.2004.01.09.21.35.40.132608@yahoo.com>
	<6ee58e07.0401092129.302cb9d4@posting.google.com>
	<pan.2004.01.11.06.08.18.867825@yahoo.com>
	<uj6Mb.20937$8H.54797@attbi_s03>
	<pan.2004.01.11.10.38.45.810669@yahoo.com>
Message-ID: <874qv2lfex.fsf@pobox.com>

Samuel Walters <swalters_usenet at yahoo.com> writes:

> |Thus Spake Rainer Deyke On the now historical date of Sun, 11 Jan 2004
> 06:46:50 +0000|
[...]
> > The issue with C is that it is too slow for implementing those
> > primitives (in part due to pointer aliasing issues).  Fortran is
> > considerably faster.
> 
> I stand corrected.
> 
> Please help me to understand the situation better.
> 
> I went digging for technical documents, but thus far haven't found many
> useful ones.  It seems everyone but me already understands pointer
> aliasing models, so they might discuss them, but they don't explain them.
[...]

(haven't read all your post, so sorry if I'm telling you stuff you
already know)

Pointer aliasing is just the state of affairs where two pointers refer
to a single region of memory.  Fortran compilers have more information
about aliasing than do C compilers, so can make more assumptions at
compilation time.

Have you tried comp.lang.fortran, comp.lang.c++, comp.lang.c, etc?

http://www.google.com/groups?q=pointer+aliasing+FAQ+group:comp.lang.fortran&hl=en&lr=&ie=UTF-8&group=comp.lang.fortran&selm=1992May27.175805.26097%40newshost.lanl.gov&rnum=3

http://tinyurl.com/2v3v5


John


From mk at net.mail.penguinista  Mon Jan 12 07:57:05 2004
From: mk at net.mail.penguinista (=?UTF-8?B?0LTQsNC80ZjQsNC9INCzLg==?=)
Date: Mon, 12 Jan 2004 13:57:05 +0100
Subject: xml-rpc for mod_python
Message-ID: <400299a1@news.mt.net.mk>


Is there any way to make an XML-RPC handler that will work inside
mod_python?

-- 
??????                                  (jabberID:damjan at bagra.net.mk)

  The NOC says:
        echo '16i[q]sa[ln0=aln100%Pln100/snlbx]sbA0D4D465452snlbxq'|dc


From d.chirila at bucarest.finsiel.ro  Fri Jan 23 04:43:11 2004
From: d.chirila at bucarest.finsiel.ro (Dragos Chirila)
Date: Fri, 23 Jan 2004 11:43:11 +0200
Subject: Ordered dictionary?
References: <leWPb.231$af7.162835@newshog.newsread.com><f7XPb.9179$7D.3428@fe2.texas.rr.com>
	<slrnc11piq.etj.apardon@trout.vub.ac.be>
Message-ID: <052901c3e195$508b29a0$2f01a8c0@dchirila>

Hi

Maybe this code will help:

import operator

def filterList(p_list, p_value):
    l_len = len(p_list)
    l_temp = map(None, (p_value,)*l_len, p_list)
    l_temp = filter(lambda x: x[1].find(x[0])==0, l_temp)
    return map(operator.getitem, l_temp, (-1,)*len(l_temp))

phones_dict = {'jansen' : '0000', 'xxx' : '1111', 'jan2' : '2222'}
names_list = filterList(phones_dict.keys(), 'jan')
phones_list = map(phones_dict.get, names_list)

print phones_list

This extracts from the dictionary the telephone(values) numbers for
names(keys) starting with 'jan'...

Dragos



> Op 2004-01-22, Paul McGuire schreef <ptmcg at users.sourceforge.net>:
> > "Leif K-Brooks" <eurleif at ecritters.biz> wrote in message
> > news:leWPb.231$af7.162835 at newshog.newsread.com...
> >> I need to associate a string (key) with an integer (value). A
dictionary
> >> would do the job, except for the fact that it must be ordered. I also
> >> need to look up the value for a specific key easily, so a list of
tuples
> >> wouldn't work.
> >>
> > If you really need to access the dictionary in sorted key order, is this
so
> > difficult?
> >
> >     dKeys = d.keys()
> >     dKeys.sort()
> >     for k in dKeys:
> >         # do stuff with k and d[k], such as:
> >         print k, "=", d[k]
> >
> > Or if you are worried about updates to d between the time of key
retrieval
> > and time of traversal (for instance, if a separate thread were to delete
one
> > of the keyed entries), take a snapshot as a list:
> >
> >     dItems = d.items()   # from here on, you are insulated from changes
to
> > dictionary 'd'
> >     dItems.sort()       # implicitly sorts by key
> >     dItems.sort( lambda a,b: a[1]-b[1] )  # sorts by value, if you so
prefer
> >     for k,v in dItems:
> >         # do stuff with k and v, such as:
> >         print k, "=", v         # <-- added benefit here of not
re-accessing
> > the list by key
>
> Well I too sometimes need the keys in a dictionary to be sorted and your
> solutions wouldn't help. The problem is the following.
>
> I have a number of key value pairs, like names and telephone numbers.
> Just more subject to change.  Now I want the telephone numbers of everyone
> whose name starts with "jan".
>
> Or I just inserted a name and want to know who is alphabetically next.
> Or I want to know who is first or last.
>
> --
> Antoon Pardon
> --
> http://mail.python.org/mailman/listinfo/python-list
>




From paulpaterson at users.sourceforge.net  Sat Jan 31 21:48:49 2004
From: paulpaterson at users.sourceforge.net (Paul Paterson)
Date: Sun, 01 Feb 2004 02:48:49 GMT
Subject: ANN: vb2Py 0.2.1 - VB to Python Conversion
Message-ID: <lOZSb.410$QU1.100@fe2.texas.rr.com>

Version 0.2.1 of vb2py has been released.

What is vb2py?
==============

vb2py is a toolkit to aid in the conversion of Visual Basic projects to
Python. The aim of the conversion is to match, as close as possible, the
original VB applications both in terms of code behaviour and form layout.
Version 0.2.1 comprises a basic layout converter (converting to PythonCard)
with a comprehensive code translation. The project roadmap
(http://vb2py.sourceforge.net/roadmap.htm) shows the project's development
timeline.

Converting VB to Python turns your VB projects into cross platform
developments and allows full access to all Python's extensive library of
modules.


What's new in v0.2.1
====================

v0.2.1 is a bug fix and minor enhancement version. Quite a large number of
Visual Basic functions and keywords were not supported in v0.2 and this is
addressed to some extent by this release. The following additional functions
were added for this release:

Array, ChDir, Choose, Environ, EOF, Erase, FileCopy, FileLen, Filter,
FreeFile, IIf, Input, InStrRev, IsArray, Join, Kill, Let, Lof, LSet, LTrim,
RTrim, Trim, MkDir, Name, Randomize, Replace, Reset, RGB, RmDir, Rnd, Round,
RSet, GetAllSettings, GetSetting, SaveSetting, DeleteSetting, Spc, Split,
StrReverse, Switch, Timer.

The coverage is still not 100% but if you whave an urgent need for a
function it can easily be bumped up the queue!


Limitations of v0.2.1
=====================

- Form layout translation is still at the v0.1 level. (target v0.3)
- Form event mapping is still primitive (target v0.3)
- Error handling, ByRef argument passing, Iterable classes are not currently
supported (target v0.4)


Getting the Software
====================

* The main website: http://vb2py.sourceforge.net
* Download this version: http://vb2py.sourceforge.net/downloads.htm
* Documentation: http://vb2py.sourceforge.net/documentation.htm
* Online trial: http://vb2py.sourceforge.net/demo.htm


Requirements
============

* Python 2.2 or greater
* PythonCard (0.7 or greater), wxWindows
* simpleparse (2.0.1a3 or greater), mxTextTools
* Visual Basic is *not* required (although it would help if you had some VB
code ...)


Licence
=======

vb2py is released under the BSD licence.


Release History
===============

0.1    (July 9, 2003) - The first release from the project - a basic form
layout translator
0.1.1  (August 1, 2003) - A bugfix release for 0.1
0.2    (September 8, 2003) - The first release with the full VB Parser
0.2.1  (February 1, 2004) - This release


Contributors Welcome
====================

This project would not be possible without the help and support of many
people. Anyone who wants to get involved is more than welcome to participate
in coding, testing, giving advice, etc. Some particular areas of interest
right now are,

- testing on large VB projects
- testing on Mac
- testing out with VBScript, VBA

In the meantime I would like to thank all those who supported and
contributed towards the v0.2.1 release.

----

Paul Paterson

vb2py :: A Visual Basic to Python Conversion Toolkit
http://vb2py.sourceforge.net






From jarausch-remove at igpm.rwth-aachen.de  Mon Jan 26 06:12:32 2004
From: jarausch-remove at igpm.rwth-aachen.de (Helmut Jarausch)
Date: Mon, 26 Jan 2004 12:12:32 +0100
Subject: raw_input - why doesn't prompt go to stderr
Message-ID: <bv2smu$leh$1@nets3.rz.RWTH-Aachen.DE>

Hi

when using an interactive Python script, I'd like the prompt given by
raw_input to go to stderr since stdout is redirected to a file.

How can I change this (and suggest making this the default behaviour)

Many thanks for a hint,

Helmut Jarausch
RWTH Aachen University
Germany


From igor.NOSPAM at obda.net  Thu Jan 29 11:15:17 2004
From: igor.NOSPAM at obda.net (Igor Fedorow)
Date: Thu, 29 Jan 2004 17:15:17 +0100
Subject: Python & XML & DTD (warning: noob attack!)
References: <pan.2004.01.29.13.04.44.213048.2804@obda.net>
	<40191C49.786AAF89@engcorp.com>
Message-ID: <pan.2004.01.29.17.15.14.806976.1255@obda.net>

On Thu, 29 Jan 2004 15:44:25 +0100, Peter Hansen wrote:

> Igor Fedorow wrote:
>> 
>> I have an XML file with an internal DTD which looks roughly like this:
>> [snip]
>> I want to parse this file into my application, modify the data (this
>> includes maybe creating and/or deleting nodes), and write it back into the
>> file -- including the DTD. (It doesn't necessarily need validation,
>> though.)
>> 
>> I tried xml.dom.ext.PrettyPrint, but it produces only [snip] actually
>> lacking the document type definition.
>> 
>> Any help is appreciated!
> 
> Unfortunately I don't know of any way you could generate the DTD again, and
> I've never seen a package which supports what you ask for (not that it isn't
> possible, mind you).
> 
> On the other hand, are you sure you need the DTD?  We use XML in dozens of
> ways and absolutely have never benefited from attempts to use DTDs, and
> don't appear to suffer from the lack thereof.
> 
> Also, aren't DTDs sort of considered either obsolete or at least vastly
> inferior to the newer approaches such as XML Schema, or both?
> 
> So my recommendation is to ditch the DTD and see if any problems arise as a
> result.
> 
> -Peter

Actually, I don't really *need* it, but I would simply like to have it -- which
obviously isn't possible...

Anyway, thank you for your help!

Cheers =)
*igor*


From RAV at ns.artphila.com  Wed Jan 28 03:31:17 2004
From: RAV at ns.artphila.com (RAV at ns.artphila.com)
Date: Wed, 28 Jan 2004 10:31:17 +0200
Subject: RAV AntiVirus scan results
Message-ID: <200401280831.i0S8VHLr005586@ns.artphila.com>


RAV AntiVirus for Linux i686 version: 8.3.2 (snapshot-20020108)
Copyright (c) 1996-2001 GeCAD The Software Company. All rights reserved.
Registered version for 2 domain(s).
Running on host: ns.artphila.com

-----------------------
 RAV Antivirus results
-----------------------

The infected file was saved to quarantine with name: 1075278677-RAVi0S8VALr005582.
The file (part0002:file.zip)->file.pif attached to mail (with subject:MAIL DELIVERY SYSTEM) sent by python-list at python.org to phila at artphila.com, 
is infected with virus: Win32/Mydoom.A at mm.
Cannot clean this file.
Cannot delete this file (most probably it's in an archive).
The mail was not delivered because it contained dangerous code.

------------------------
this is a copy of the e-mail header:




Scan engine 8.11 () for i386.
Last update: Tue Jan 27 05:03:51 2004
Scanning for 89279 malwares (viruses, trojans and worms).

To get a free 60-days evaluation version of RAV AntiVirus v8
(yet fully functional) please visit:

   http://www.ravantivirus.com




From michael at foord.net  Wed Jan 28 11:34:43 2004
From: michael at foord.net (Fuzzyman)
Date: 28 Jan 2004 08:34:43 -0800
Subject: Webhosting with Python
Message-ID: <8089854e.0401280834.6fd4f972@posting.google.com>

I've recently starting using a very cheap web hoster who has python
2.2 installed.... almost free hosting (but not quite).....

Thought some of you guys might be interested..........

http://www.xennos.com

Fuzzyman



-- 

http://www.Voidspace.org.uk 
The Place where headspace meets cyberspace. Online resource site -
covering science, technology, computing, cyberpunk, psychology,
spirituality, fiction and more.

---

http://www.voidspace.org.uk/atlantibots/pythonutils.html
Pythonutils - home of dateutils, ConfigObj, StandOut, CGI-News and
more.


From jcarlson at nospam.uci.edu  Fri Jan 23 15:07:47 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Fri, 23 Jan 2004 12:07:47 -0800
Subject: Server and Client Socket problem
In-Reply-To: <bur638$kjb5o$1@ID-111250.news.uni-berlin.de>
References: <bur59q$kel$1@nsnmrro2-gest.nuria.telefonica-data.net>
	<bur638$kjb5o$1@ID-111250.news.uni-berlin.de>
Message-ID: <burv2h$sq$1@news.service.uci.edu>

> This code can obviously not run, as its not properly indented. I'm sure that
> indentation got somehow lost when you create the posting, but as long as
> you don't provide it in a executable fashion, we can't help you.

Agreed.

> However, as someone beeing recently converted from hand-made socket
> programming to twisted, I suggest instead of working with sockets yourself,
> you better investigate into the twisted framework. Its very well
> documented.

After having written both synchronous and asynchronous servers and 
clients using Python sockets, I've been very happy with the asyncore 
standard library.  I should probably give twisted a shot, but writing 
with asyncore is so easy that I'm hard-pressed to even bother.  I also 
get a sick satisfaction in implementing protocols...but maybe that is 
just me.

  - Josiah


From bkc at Murkworks.com  Thu Jan 22 09:53:51 2004
From: bkc at Murkworks.com (Brad Clements)
Date: Thu, 22 Jan 2004 09:53:51 -0500
Subject: PyCon2004 - Where to stay, which airport?
Message-ID: <buoo60$54m$1@sea.gmane.org>

I think this year I might be able to make it to my first Python conference.

Cheap flights from Ottawa (2 hour drive), $278 or so to DCA. (but from
Massena, 30 minute drive) $1200 to DCA. Thanks FAA Essential Air Service.

Anyway, where should I stay that's cheap but not too yucky? I don't mind
riding the subway. I might come early for sprints or the Smithsonian.

I couldn't find recommended lodgings on the PyCon wiki. Is DCA the correct
airport?

--
Novell DeveloperNet Sysop #5

_






From lubowiecka at go2.pl  Thu Jan  8 10:32:17 2004
From: lubowiecka at go2.pl (Nazgul)
Date: Thu, 8 Jan 2004 16:32:17 +0100
Subject: "Interrupted function call" exception while relogging :(
References: <f6554b84.0401080103.565e2f93@posting.google.com>
	<4qv6n6ne.fsf@python.net>
Message-ID: <btjsuo$6v0$1@atlantis.news.tpi.pl>


Uzytkownik "Thomas Heller" <theller at python.net> napisal w wiadomosci >
writes:
> Just an idea: you could try to use win32api.Sleep() instead.
>
> Thomas

Thanks! I will try now and let you know if it works for my case... Thanks
for reply!

Best wishes,

Sylwia




From james at logicalprogression.net  Thu Jan 22 06:37:19 2004
From: james at logicalprogression.net (James Henderson)
Date: Thu, 22 Jan 2004 11:37:19 +0000
Subject: Converting a string to integer/float
In-Reply-To: <2981adb9.0401211943.e1ae272@posting.google.com>
References: <2981adb9.0401211943.e1ae272@posting.google.com>
Message-ID: <200401221137.19357.james@logicalprogression.net>

On Thursday 22 January 2004 3:43 am, Ikot wrote:
> Hello,
> I am stuck with a problem, might be very trivial, to ask here, but
> dont find a way out. I read a string like 12345.678 from a text file,
> which will be string for me, but how do I convert it into a float for
> my use ?
> Thanks
> Ikot

float is a builtin type that can be constructed from a string:

>>> float('12345.678')
12345.678

You'd probably find it helpful to work your way through:

http://www.python.org/doc/current/lib/built-in-funcs.html

James
-- 
James Henderson, Logical Progression Ltd.
http://www.logicalprogression.net/
http://sourceforge.net/projects/mailmanager/




From slzatz at hotmail.com  Sun Jan 18 18:45:31 2004
From: slzatz at hotmail.com (Steve Zatz)
Date: 18 Jan 2004 15:45:31 -0800
Subject: Simple (?) Regular Expression Question
Message-ID: <6747bc9d.0401181545.2b4ffb14@posting.google.com>

Is '@' a special character in regular expressions?  I am asking
because I don't understand the following:

>>> import re
>>> s = ' @'
>>> re.sub(r'\b@','*',s)
' @'
>>> s = ' a'
>>> re.sub(r'\ba','*',s)
' *'

Have googled atsign and regular expressions but have not found
anything useful.  System is Win XP, Python 2.3.3. Any help would be
appreciated.


From dman at dman13.dyndns.org  Fri Jan  2 09:35:03 2004
From: dman at dman13.dyndns.org (Derrick 'dman' Hudson)
Date: Fri, 02 Jan 2004 14:35:03 GMT
Subject: Graph in wxPython
References: <bt04a4$2e3$1@news.Stanford.EDU>
	<4f0a9fdb.0312312356.75a4fe15@posting.google.com>
Message-ID: <ptbgc1-4iv.ln1@dman13.dyndns.org>

On 31 Dec 2003 23:56:09 -0800, Miki Tebeka wrote:
> Hello "Oh Kyu Yoon",
> 
>> Does anyone know how to implement plots from scipy, chaco, etc
>> into wxPython widget?
>
> Save them as an image and use wxImage?

This works.  This past spring I had to implement basic graph
generation for a school project I was using wxPython for.  I opened a
pipe to gnuplot, let it create an image, then displayed the image.

-D

-- 
If your life is a hard drive,
Christ can be your backup.
 
www: http://dman13.dyndns.org/~dman/            jabber: dman at dman13.dyndns.org


From cygnus at cprogrammer.org  Tue Jan 20 16:48:43 2004
From: cygnus at cprogrammer.org (Jonathan Daugherty)
Date: Tue, 20 Jan 2004 16:48:43 -0500
Subject: XML-RPC
Message-ID: <20040120214843.GA21585@mail.theserver.ath.cx>

I'm using python 2.3.3 (#2, Jan  4 2004, 12:24:16), [GCC 3.3.3 20031229
(prerelease) (Debian)], debian unstable.  I have written a client and
server program which communicate using the built-in xmlrpclib and
SimpleXMLRPCServer.  The server starts up fine, and the client can
connect to it and issue commands (method calls) just fine.  However,
after some unknown period of time, the client hangs at the time of the
method call, during which time netstat reports:

      recv  send
tcp   307   0  127.0.0.1:9000   127.0.0.1:35496   ESTABLISHED

Once I break the client and run netstat again, I get:

tcp   307   0  127.0.0.1:9000   127.0.0.1:35496   CLOSE_WAIT

And lines such as these hang around in netstat's output for quite some
time (several are there now, left over from attempts to run the client
about 8 hours ago).  I haven't been able to identify exactly when this
starts to occur or why.  Sometimes it happens soon after starting the
server; sometimes it takes days.

The server is multi-threaded.  The XML-RPC thread is the main thread.
Proper locking mechanisms are used and I have been able to determine
that deadlock is not an issue.

Does anyone have any ideas?

Thanks!

-- 

  Jonathan Daugherty
  http://www.cprogrammer.org

  "It's a book about a Spanish guy called Manual, you should read it."
                                                            -- Dilbert



From reply.in.the.newsgroup at my.address.is.invalid  Sat Jan 24 06:19:10 2004
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Sat, 24 Jan 2004 12:19:10 +0100
Subject: efficient matching of elements a list
References: <pkqQb.2735$KU5.1436@nwrddc02.gnilink.net>
Message-ID: <uvk410hu0n85nomucb7ah55v0mfnc62snv@4ax.com>

omission9:
>Suppose I have a lists of tuples
>What is the fastest way in python to get out all the tuples from the 
>list whose first element is equal to i?

A list is not an efficient data structure for this query. Why don't you
design another data structure?

-- 
Ren? Pijlman


From gerrit at nl.linux.org  Thu Jan 15 09:22:48 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Thu, 15 Jan 2004 15:22:48 +0100
Subject: super. could there be a simpler super?
In-Reply-To: <sovc00l3iqa8cpvoc889r7npr6144hcuh5@4ax.com>
References: <mailman.385.1074156644.12720.python-list@python.org>
	<sovc00l3iqa8cpvoc889r7npr6144hcuh5@4ax.com>
Message-ID: <20040115142248.GA4189@nl.linux.org>

Kristian Ovaska wrote:
> Kerim Borchaev <warkid at hotbox.ru>:
> >  Is it possible that such a "super"(deducing class method declaration
> >  context) could appear in Python?
> >  (It seems to me that to implement a simple super something should be
> >  done during "compilation" of class declaration.)
> 
> The document "Unifying types and classes in Python 2.2" by Guido
> probably answers your question.
> 
> Quote from http://www.python.org/2.2.3/descrintro.html#cooperation
> regarding super:
> 
> "It would be nice if we didn't have to name the class explicitly, but
> this would require more help from Python's parser than we can
> currently get. I hope to fix this in a future Python release by making
> the parser recognize super."

Another quote from the same page :) :

--- start quote ---
Our second example creates a class, 'autosuper', which will add a
private class variable named __super, set to the value super(cls).
(Recall the discussion of self.__super above.) Now, __super is a private
name (starts with double underscore) but we want it to be a private name
of the class to be created, not a private name of autosuper. Thus, we
must do the name mangling ourselves, and use setattr() to set the class
variable. For the purpose of this example, I'm simplifying the name
mangling to "prepend an underscore and the class name". Again, it's
sufficient to override __init__ to do what we want, and again, we call
the base class __init__ cooperatively.

class autosuper(type):
    def __init__(cls, name, bases, dict):
        super(autosuper, cls).__init__(name, bases, dict)
        setattr(cls, "_%s__super" % name, super(cls))

Now let's test autosuper with the classic diamond diagram:

class A:
    __metaclass__ = autosuper
    def meth(self):
        return "A"
class B(A):
    def meth(self):
        return "B" + self.__super.meth()
class C(A):
    def meth(self):
        return "C" + self.__super.meth()
class D(C, B):
    def meth(self):
        return "D" + self.__super.meth()

assert D().meth() == "DCBA"

(Our autosuper metaclass is easily fooled if you define a subclass with
the same name as a base class; it should really check for that condition
and raise an error if it occurs. But that's more code than feels right
for an example, so I'll leave it as an exercise for the reader.) 

--- end quote ---

yours,
Gerrit.
-- 
164. If his father-in-law do not pay back to him the amount of the
"purchase price" he may subtract the amount of the "Purchase price" from
the dowry, and then pay the remainder to her father's house.
          -- 1780 BC, Hammurabi, Code of Law
-- 
PrePEP: Builtin path type
    http://people.nl.linux.org/~gerrit/creaties/path/pep-xxxx.html
Asperger's Syndrome - a personal approach:
	http://people.nl.linux.org/~gerrit/english/



From johnbenson at fairisaac.com  Tue Jan 27 21:51:02 2004
From: johnbenson at fairisaac.com (Benson, John)
Date: Tue, 27 Jan 2004 18:51:02 -0800
Subject: Oracle beginner problem: can't connect to Oracle using cx_Oracle
Message-ID: <1EDE1E01D95DBE48BB06385C08CEFA7604090A34@sdomsg00.corp.fairisaac.com>

Hi, I'm a non-Oracle guy just starting to use Python to explore Oracle.
I enclose the Python command prompt log for the usage example further
down with only the user, password and host names changed to keep me out
of trouble. But first, I'd like to point out that I'm able to logon to
myhost, and get into the following via SQL*Plus using myuser/mypassword

Oracle8i Enterprise Edition Release 8.1.7.3.0 - Production 
With the Partitioning option                               
JServer Release 8.1.7.3.0 - Production

(end quote of Unix box SQL*Plus stuff)  

so I know that myuser/mypassword works for SQL*Plus on the myhost Unix
box.

I downloaded the cx_Oracle Python interface to Oracle(r) Version: 4.0
Date: December 17, 2003 Win32 binary for Oracle 8i, Python 2.) and
proceeded to exercise the usage example:                   

PythonWin 2.3.2 (#49, Oct  2 2003, 20:02:00) [MSC v.1200 32 bit (Intel)]
on win32.
Portions Copyright 1994-2001 Mark Hammond (mhammond at skippinet.com.au) -
see 'Help/About PythonWin' for further copyright information.
>>> import cx_Oracle
>>> connection = cx_Oracle.connect("myuser/mypassword at myhost")
Traceback (most recent call last):
  File "<interactive input>", line 1, in ?
DatabaseError: ORA-12514: TNS:listener could not resolve SERVICE_NAME
given in connect descriptor

>>>

(end usage example quote)

Any ideas as to what the problem is?

Thanks in advance for the usual valuable and pertinent advice I have
come to expect from this forum.

John Benson
jsbenson at bensonsystems.com




From pythonguy at Hotpop.com  Thu Jan  1 02:01:47 2004
From: pythonguy at Hotpop.com (Anand Pillai)
Date: 31 Dec 2003 23:01:47 -0800
Subject: Graph in wxPython
References: <bt04a4$2e3$1@news.Stanford.EDU>
Message-ID: <84fc4588.0312312301.68d0a717@posting.google.com>

This might be helpful.

http://starship.python.net/crew/jhauser/plot-res.html

-Anand

"Oh Kyu Yoon" <okyoon at stanford.edu> wrote in message news:<bt04a4$2e3$1 at news.Stanford.EDU>...
> Does anyone know how to implement plots from scipy, chaco, etc
> into wxPython widget?
> 
> Thank you


From bmgx_no_sp at mgleesonprop.co.za  Thu Jan  8 05:48:10 2004
From: bmgx_no_sp at mgleesonprop.co.za (bmgx)
Date: Thu, 08 Jan 2004 12:48:10 +0200
Subject: creating a daemon?
Message-ID: <3ffd355c.0@news1.mweb.co.za>

This is what I am trying to find out, instruction on how to create a 
simple daemon on unix systems(Linux), can't find any info on usual sources..



From gulliver at atr.co.jp  Sat Jan 24 01:50:28 2004
From: gulliver at atr.co.jp (Roberto Lopez-Gulliver)
Date: 23 Jan 2004 22:50:28 -0800
Subject: Psyco on PowerPC?
References: <30E0BEC9-4DE7-11D8-B663-000393DB5438@andrew.cmu.edu>
Message-ID: <26b7aa41.0401232250.3e6588a8@posting.google.com>

Hi Ben,

Directly from Armin

http://codespeak.net/pipermail/pypy-dev/2003q3/002219.html

Haven't try it myself though.

Please post here any success/failure you may experience in Mac OSX.

Hope this helps.

--roberto

Han Benjamin <bhan at andrew.cmu.edu> wrote in message news:<30E0BEC9-4DE7-11D8-B663-000393DB5438 at andrew.cmu.edu>...
> Is anyone aware of any effort in bringing Psyco onto other platforms, 
> esp. PowerPC (Mac OS X)? I checked the website but it's still stated as 
> X86 only.
> 
> Thanks,
> 
> Ben


From 2002 at weholt.org  Thu Jan 15 11:41:08 2004
From: 2002 at weholt.org (Thomas Weholt)
Date: Thu, 15 Jan 2004 17:41:08 +0100
Subject: Python and CVS: several modules, one namespace
Message-ID: <kqzNb.1553$hd.30612@news2.e.nsc.no>

This might be slightly off-topic, but I'll ask anyway:

I want to import several modules into my cvs-repository, but I want them all
to be in the same namespace when they're checked out.

For instance, I got these modules foo1.py, foo2.py, foo3.py in the namespace
bar, called like so :

from bar import foo2, foo3

This matched the folder-structure ../bar/foo2, ../bar/foo3 on the
filesystem. But I need to import them as foo1, foo2 and foo3. When checked
out they should all be available in the same namespace without having to
create the folder, __init__.py first. Is this possible?

When I check out foo1 it creates ../bar/foo1, when I check out foo2 in the
same folder it creates foo2 etc. without messing up the CVS-folders .... (
Hm ... when I look at the whole thing now, it seems impossible )

Any hints or clues on how to manage different modules in the same namespace
when importing them into CVS ??? My main goal is to have one namespace for
all my modules. Please tell me if this doesn't make any sense.

Thanks in advance,
Thomas Weholt




From peter at engcorp.com  Tue Jan 27 17:47:12 2004
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 27 Jan 2004 17:47:12 -0500
Subject: Portable /dev/null?
References: <zQBRb.6394$Ja2.59118@nnrp1.uunet.ca>
Message-ID: <4016EA70.7B7C5D67@engcorp.com>

Nicolas Fleury wrote:
> 
>         Is there an object in some standard library that would be the portable
> equivalent of "file('/dev/null','w')" or do I have to create my own
> class and object to do it?  If it doesn't exist, do you think it would
> be a good idea to have such an object in a standard library?

Probably considered too simple to bother putting in the standard library.

class nullFile:
    def write(self, data):
        pass

>>> n = nullFile()
>>> print >>n, "this goes nowhere"

Or something to that effect...

-Peter


From johnfabel at btinternet.com  Sat Jan 31 16:57:47 2004
From: johnfabel at btinternet.com (John Abel)
Date: Sat, 31 Jan 2004 21:57:47 +0000
Subject: TCP server as a Windows service using Python?
In-Reply-To: <pan.2004.01.30.00.11.06.642734@spamfree.optushome.com.au>
References: <pan.2004.01.30.00.11.06.642734@spamfree.optushome.com.au>
Message-ID: <401C24DB.1020104@btinternet.com>

I don't know if this will be of use to you.  Here's a snip of code, that 
I used to run a web server as a service.  It uses my custom module based 
on SimpleHTTPServer, but you get the idea.

HTH

J

    def SvcDoRun( self ):
        threadEvent = threading.Event()
        threadEvent.set()
        webUI = httpWebService( threadEvent )
        webUI.start()

        win32event.WaitForSingleObject( self.hWaitStop, 
win32event.INFINITE )

        threadEvent.clear()
        webUI.join()

class httpWebService( threading.Thread ):

    def __init__( self, eventNotifyObj ):
        threading.Thread.__init__( self )
        self.notifyEvent = eventNotifyObj

    def run ( self ):
        serverPort = 10080
        SimpleHTTPServer2.SimpleHTTPRequestHandler.documentRoot = 
"F:\Temp\HTTPR
oot"
        httpServer = SimpleHTTPServer2.HTTPServer( ('', serverPort), 
SimpleHTTPS
erver2.SimpleHTTPRequestHandler )
        httpServerWait = httpServer.fileno()
        while self.notifyEvent.isSet():
            httpReady = select.select( [httpServerWait], [], [], 1)
            if httpServerWait in httpReady[0]:
                httpServer.handle_request()


David Mitchell wrote:

>Hello group,
>
>I'm trying to create a TCP server using Python, and I want it to run under
>Windows as a service.
>
>Now, I'm fine with building the TCP server using Python - done it lots of
>times, and I know there's lots of sample code out there I can grab if I
>ever need to.
>
>Equally, I think I've got the simpler concepts about creating Windows
>services using Python clear.  I've got the Python Win32 book, worked
>through the example code in there and haven't had any real problems with
>it.
>
>Where I'm having trouble is with the overlapped I/O call.  When I create a
>TCP server, I need to have it sit there waiting for a client
>connection.  With a Windows service, it has to sit there waiting for
>administrative messages such as e.g. a "stop service" message.  The
>example code in the Python Win32 book uses named pipes to do IO -
>I'm constrained to using TCP sockets.
>
>I can't see how to let the service accept *either* an incoming TCP client
>connection *or* an e.g. "stop service" message.  If someone could point me
>to some sample code, I'd greatly appreciate it - Google hasn't been
>helpful.
>
>Thanks in advance
>
>Dave M.
>  
>



From piedmontbiz at aol.com  Fri Jan  9 09:18:30 2004
From: piedmontbiz at aol.com (PiedmontBiz)
Date: 09 Jan 2004 14:18:30 GMT
Subject: Bruce Eckel example / CGI server for localhost for Windows XP
References: <3ffeaac9$0$321$e4fe514c@news.xs4all.nl>
Message-ID: <20040109091830.29446.00002360@mb-m02.aol.com>

de Jong website great.
I get errors though when I click any link.
""""""
Exception in server
Page "/index2.y" caused an error: session is transported to different remote
address
Traceback (innermost last):
  File "/home/promozilla/Server/snakeserver/webapp.py", line 410, in
run_Ypage_GET
    self.pageEngine.addPageVars(page, self, req, resp)
  File "/home/promozilla/Server/snakeserver/YpageEngine.py", line 123, in
addPageVars
    session=webapp.addSessionCookie(request,response)
  File "/home/promozilla/Server/snakeserver/webapp.py", line 486, in
addSessionCookie
    session.setRequestData(request,response)
  File "/home/promozilla/Server/snakeserver/websession.py", line 31, in
setRequestData
    raise ValueError("session is transported to different remote address")
ValueError: session is transported to different remote address

"""



From theller at python.net  Tue Jan 13 13:38:27 2004
From: theller at python.net (Thomas Heller)
Date: Tue, 13 Jan 2004 19:38:27 +0100
Subject: Py2Exe and Outlook (array bounds change!?)
References: <982e9537.0401130858.4d37dae5@posting.google.com>
Message-ID: <k73vk82k.fsf@python.net>

hlubocky at uiuc.edu (Brian Hlubocky) writes:

> This one is really puzzling me. I am not that familiar with COM or
> py2exe, but I have tested this a fair amount and am pretty sure of
> what I am about to explain. The MSDN website says that the item list
> in Outlook has array bounds from 1 to length. Using this information,
> I wrote a program that adds contacts to outlook using an external
> database. When I went to try this out with py2exe however, I got an
> exception.
>
> What I found out is that when using py2exe, the bounds on the items
> list changes from 1 to len, to 0 to len-1. Does anyone have any idea
> why this might be? It seems goofy that this would happen. Testing is
> on the developer machine, so I don't think different dlls could be the
> problem. Thanks!

Just a wild idea: can it be that you're using makepy generated modules
in the script, and late bould com in the py2exe'd file?

Thomas


From peter at engcorp.com  Thu Jan 29 09:41:14 2004
From: peter at engcorp.com (Peter Hansen)
Date: Thu, 29 Jan 2004 09:41:14 -0500
Subject: "static" checking
References: <160Sb.19106$fo1.10783@newssvr25.news.prodigy.com>
Message-ID: <40191B89.DE149A45@engcorp.com>

Moosebumps wrote:
> 
> I'm wondering what kind of checking I can do on a python program before
> running it (besides reading over every line).  I hate running a long python
> script, only to have it fail at the end because I misspelled a function
> name, or made some other silly mistake that a compiler would normally catch.
> Then I have to run it all over again to see what happened or come up with
> some sort of short test.
> 
> I usually do try to isolate the new parts of my code, and run them first
> with some dummy data that will run fast.  But that is not always possible
> because of dependencies, and it would be nice to have some sort of sanity
> check up front.

These issues largely go away once you start doing test-driven development.
See, for example, Mark Pilgrim's excellent introduction in his book at
http://www.diveintopython.org/ (see the link under "unit testing"), or 
Kent Beck's paper book "Test-Driven Development" (published by Addison Wesley).

With this approach, your code generally won't have those dependencies 
(sometimes the approach has to be tried before someone can really believe
that, but it's true) and you find your spelling mistakes, and many other
problems that static checking can't find, in seconds without no more
effort than it takes to run a batch file.

-Peter


From lubowiecka at go2.pl  Tue Jan 27 14:07:50 2004
From: lubowiecka at go2.pl (Ringwraith)
Date: Tue, 27 Jan 2004 20:07:50 +0100
Subject: python service running on Win Xp,
	but failing on Win NT Workstation :(
References: <bv3bs0$la0$1@atlantis.news.tpi.pl>
	<bv3uqr$5ji$1@nemesis.news.tpi.pl>
	<bv4744$2dbl$1@arachne.labyrinth.net.au>
Message-ID: <bv6d36$8pm$1@atlantis.news.tpi.pl>

Thanks Mark!




From sombDELETE at pobox.ru  Sat Jan  3 15:21:05 2004
From: sombDELETE at pobox.ru (Serge Orlov)
Date: Sat, 3 Jan 2004 23:21:05 +0300
Subject: Creating a capabilities-based restricted execution system
References: <LmmdnUn4seDeGWuiXTWc-w@speakeasy.net>
Message-ID: <bt788l$1pej$1@nadya.doma>


"Sean R. Lynch" <seanl at chaosring.org> wrote in message news:LmmdnUn4seDeGWuiXTWc-w at speakeasy.net...
> I've been playing around with Zope's RestrictedPython, and I think I'm
> on the way to making the modifications necessary to create a
> capabilities-based restricted execution system. The idea is to strip out
> any part of RestrictedPython that's not necessary for doing capabilities
> and do all security using just capabilities.
>
> The basic idea behind capabilities is that you don't give any piece of
> code you don't trust a reference to something you don't want it to have
> access to. You use proxies instead (E calls them "facets").

"Don't give" sounds good in theory but fails in practice. You can't prevent
leakage 100%, so any security system _must_ help programmer to keep
trusted data away from untrusted code. Do you know that rexec failed
exactly because it didn't help to prevent leakage?

>
> In order to be able to allow untrusted code to create proxy objects, I
> needed to be able to store a reference to the proxied object in a
> private attribute.
>
> To create private attributes, I'm using "name mangling," where names
> beginning with X_ within a class definition get changed to
> _<uuid>_<name>, where the UUID is the same for that class. The UUIDs
> don't need to be secure because it's not actually possible to create
> your own name starting with an underscore in RestrictedPython; they just
> need to be unique across all compiler invocations.

This is a problem: you declare private attributes whereas you should be
declaring public attributes and consider all other attributes private. Otherwise
you don't help prevent leakage. What about doing it this way:

obj.attr means xgetattr(obj,acc_tuple) where acc_tuple = ('attr',UUID)
and xgetattr is
def xgetattr(obj,acc_tuple):
  if not has_key(obj.__accdict__,acc_tuple):
    raise AccessException
  return getattr(obj,acc_tuple[0])

__accdict__ is populated at the time class or its subclasses are created.
If an object without __accdict__ is passed to untrusted code it will
just fail. If new attributes are introduced but not declared in __accdict__
they are also unreachable by default.

>
> The nice thing about using this name mangling is that it's only done at
> compile time and doesn't affect runtime performance. An interesting side
> effect is that code defined on a class can access private attributes on
> all descendants of that class, but only ones that are defined by other
> code on that class, so this isn't a security issue.
>
> I was thinking I needed read-only attributes to be able to avoid
> untrusted code's being able to sabotage the revoke method on a proxy
> object, but I'm thinking that just keeping around a reference to the
> revoke method in the original code may be enough.
>
> Does anyone think I'm going in completely the wrong direction here? Am I
> missing anything obvious?

It depends on what type of security do you want. Did you think about DOS
and covert channels? If you don't care about that, yeah, you don't miss
anything obvious. <wink> you should worry whether you miss something
non-obvious.

By the way, did you think about str.encode? Or you are not worried about
bugs in zlib too?

-- Serge.




From jangseungwook at nate.com  Tue Jan 13 21:27:41 2004
From: jangseungwook at nate.com (jang, seungwook)
Date: 13 Jan 2004 18:27:41 -0800
Subject: When I installed Silva-0.9.3 and restart Zope,
	I found  ImportError like this - cannot import name ExpatError -
Message-ID: <dea2ed57.0401131827.421d8a2c@posting.google.com>

[root at orange Zope-2.6.2-linux2-x86]# ./start
------
2004-01-14T09:12:19 INFO(0) zdaemon Started subprocess: pid 14941
------
2004-01-14T09:12:38 ERROR(200) Zope Could not import
Products.SilvaDocument
Traceback (innermost last):
  File /usr/local/zope/Zope-2.6.2-linux2-x86/lib/python/OFS/Application.py,
line 522, in impor
t_product
  File /usr/local/zope/Zope-2.6.2-linux2-x86/lib/python/Products/SilvaDocument/__init__.py,
li
ne 7, in ?
  File /usr/local/zope/Zope-2.6.2-linux2-x86/lib/python/Products/SilvaDocument/EditorSupportNe
sted.py, line 10, in ?
ImportError: cannot import name ExpatError
------
2004-01-14T09:12:38 PANIC(300) z2 Startup exception
Traceback (innermost last):
  File /usr/local/zope/Zope-2.6.2-linux2-x86/z2.py, line 585, in ?
  File /usr/local/zope/Zope-2.6.2-linux2-x86/lib/python/Zope/__init__.py,
line 46, in startup
    (Object: startup)
  File /usr/local/zope/Zope-2.6.2-linux2-x86/lib/python/Zope/App/startup.py,
line 45, in start
up
  File /usr/local/zope/Zope-2.6.2-linux2-x86/lib/python/OFS/Application.py,
line 500, in impor
t_products
  File /usr/local/zope/Zope-2.6.2-linux2-x86/lib/python/OFS/Application.py,
line 522, in impor
t_product
  File /usr/local/zope/Zope-2.6.2-linux2-x86/lib/python/Products/SilvaDocument/__init__.py,
li
ne 7, in ?
  File /usr/local/zope/Zope-2.6.2-linux2-x86/lib/python/Products/SilvaDocument/EditorSupportNe
sted.py, line 10, in ?
ImportError: cannot import name ExpatError


Please Help Me ~ 

S.W. Jang


From Pieter.Claerhout at Creo.com  Fri Jan  9 09:51:08 2004
From: Pieter.Claerhout at Creo.com (Pieter Claerhout)
Date: Fri, 9 Jan 2004 15:51:08 +0100 
Subject: Twisted or Medusa or Zope
Message-ID: <490316A24CC5D411ACD700B0D078F7F003915D67@cseexch01.cse.creoscitex.com>

The right address for Snakelets is:
http://snakelets.sourceforge.net

Cheers,


pieter

Creo
pieter claerhout | product support prinergy | tel: +32 2 352 2511 |
pieter.claerhout at creo.com | www.creo.com

IMAGINE CREATE BELIEVE(tm)


-----Original Message-----
From: Peter Hansen [mailto:peter at engcorp.com] 
Sent: 09 January 2004 15:44
To: python-list at python.org
Subject: Re: Twisted or Medusa or Zope


Robin Becker wrote:
> 
> In article <3FFEB6D6.BF92551E at engcorp.com>, Peter Hansen
> <peter at engcorp.com> writes
> ..
> ...
> >enlighten me.
> >
> >Thomas, you're completely ON track here... I just wanted to emphasize
that
> >Twisted is much more polished and sophisticated.  I'd even have to say,
> >as a programmer using them, that Twisted does actually provide a simpler
and
> >cleaner API.  It and Medusa are much closer in concept than either is to
> >Zope, though, as you say.
> >
> In another thread http://snakelets.sf.org was mentioned.

I get at least a temporary "server not found" error when I try that name.

In any case, anything added on top of Twisted and Medusa are, of course,
not Twisted and Medusa.  Zope is added on top of Medusa, and doubtless there
are and will be many things added on top of Twisted, some of which may
be similar in purpose to Zope (specifically, content-management systems
rather than just frameworks for application writing).

-Peter
-- 
http://mail.python.org/mailman/listinfo/python-list



From alan.gauld at blueyonder.co.uk  Sat Jan 24 12:56:10 2004
From: alan.gauld at blueyonder.co.uk (Alan Gauld)
Date: Sat, 24 Jan 2004 17:56:10 -0000
Subject: [Tutor] there is no exitfunc in sys module
References: <20040124080753.97159.qmail@web61109.mail.yahoo.com>
Message-ID: <005501c3e2a3$59bb0040$6401a8c0@xp>

>  i was reading the manual for sys module. i found a
> description for a function known as exitfunc....
> interpreter exits. but when i try to call this
> function on Python interactive prompt it says there is
> no attribute named exitfunc in sys module.

Doing help(sys) yields this:

exitfunc -- if sys.exitfunc exists, this routine is called when Python
exits
      Assigning to sys.exitfunc is deprecated; use the atexit module
instead.

So the note tells us that exitfunc does not exist by default
you have to create it. However it also tells us that this is
deprecated - ie old fashioned and becoming obsolete - you should
use atexit instead

However just to illustrate how exitfun can be used:

>>> import sys
>>> def f(): print "GOOOODBYEEEE!"
...
>>> sys.exitfunc = f
>>> sys.exit()
GOOOODBYEEEE!

So you assign a function to sys.exitfunc and when you call
sys.exit() to exit it in turn calls your exit function.

HTH,

Alan G
Author of the Learn to Program web tutor
http://www.freenetpages.co.uk/hp/alan.gauld




From peter at engcorp.com  Thu Jan 22 19:10:40 2004
From: peter at engcorp.com (Peter Hansen)
Date: Thu, 22 Jan 2004 19:10:40 -0500
Subject: strtotime?
References: <kvYPb.242$af7.175373@newshog.newsread.com>
	<40105afb$0$319$e4fe514c@news.xs4all.nl>
	<bwZPb.244$af7.182636@newshog.newsread.com>
Message-ID: <40106680.849ADEFA@engcorp.com>

Leif K-Brooks wrote:
> 
> Irmen de Jong wrote:
> >> PHP has a very nice strtotime function (http://php.net/strtotime)
> >> which converts a date/time in virtually any format into a timestamp.
> >> Does Python have a similar function?
> >
> > I guess you're looking for:  time.strptime
> 
> Thanks, but no. PHP's strtotime() function magically guesses the format
> on its own, time.strptime() just uses a fixed format.

Perhaps the mx.DateTime package would help:

>From http://www.lemburg.com/files/python/mxDateTime.html:
------------------------------
DateTimeFrom(*args,**kws) 

Constructs a DateTime instance from the arguments. 

This constructor can parse strings, handle numeric arguments and knows about 
the keywords year,month,day,hour,minute,second.  

It uses type inference to find out how to interpret the arguments and makes 
use of the Parser module. 
------------------------------

-Peter


From cherico at bonbon.net  Thu Jan 29 13:41:51 2004
From: cherico at bonbon.net (cherico)
Date: 29 Jan 2004 10:41:51 -0800
Subject: read() on tempfile
Message-ID: <afc115ec.0401291041.155b51ee@posting.google.com>

from tempfile import *

f = NamedTemporaryFile ()
f = write ( 'test' )
print f.read () #here print nothing

why is it nothing to read()?
I suppose f is of mode 'w+'


From mhammond at skippinet.com.au  Mon Jan 26 00:01:26 2004
From: mhammond at skippinet.com.au (Mark Hammond)
Date: Mon, 26 Jan 2004 16:01:26 +1100
Subject: ReadDirectoryChangesW (windows)
In-Reply-To: <bv21j3$ong$1@chessie.cirr.com>
References: <bv21j3$ong$1@chessie.cirr.com>
Message-ID: <bv26vb$2cem$1@arachne.labyrinth.net.au>

Ognen Duzlevski wrote:
> Hi all,
> 
> I am new to win32 programming and was wondring if anyone can enlighten me on a question I have:
> 
> there is a win32file function I would like to use - ReadDirectoryChangesW() and its parameters are, according to
> below:
> 
> ----
> ReadDirectoryChangesW(handle, size, bWatchSubtree, dwNotifyFilter, overlapped)
> 
> retrieves information describing the changes occurring within a directory.
> 
> Parameters:
> 
> handle : int
> Handle to the directory to be monitored. This directory must be opened with the FILE_LIST_DIRECTORY access right.
> 
> size : int
> Size of the buffer to allocate for the results.
> 
> bWatchSubtree : int
> Specifies whether the ReadDirectoryChangesW function will monitor the directory or the directory tree. If TRUE is 
> specified, the function monitors the directory tree rooted at the specified directory. If FALSE is specified, the 
> function monitors only the directory specified by the hDirectory parameter.
> 
> dwNotifyFilter : int
> Specifies filter criteria the function checks to determine if the wait operation has completed. This parameter can be 
> one or more of the FILE_NOTIFY_CHANGE_* values.
> 
> overlapped=None : PyOVERLAPPED
> Must be None
> ------
> 
> I would like to use this function asynchronously to open a directory using the FILE_FLAG_OVERLAPPED flag so that I can 
> later on wait for a change to be signalled and so that I can use this in a service waiting with e.g. 
> WaitForSingleObject().
> 
> I don't have much experience using pywin32 and I am puzzled by the last line "Must be None". Does this mean 
> asynchronous access is not supported? Or am I ready to actually RTFM if someone can politely point me to one? :)

I'm afraid it is not yet supported.  Patches gratefully accepted (and I 
am willing to help) :)

Mark.



From carroll at tjc.com  Mon Jan 26 15:53:44 2004
From: carroll at tjc.com (Terry Carroll)
Date: Mon, 26 Jan 2004 20:53:44 GMT
Subject: Newbie Nested Function Problem
References: <O4GQb.12838$Tk3.10642@twister.nyroc.rr.com>
	<52d610h685a613ua1tk5k8f11cv1d61q0b@4ax.com>
	<9%GQb.77000$Su5.22817@twister.nyroc.rr.com>
Message-ID: <4kra10pntvn274ilp0mgirfl7tldmh9noe@4ax.com>

On Sun, 25 Jan 2004 03:47:17 GMT, "Brian Samek"
<zensunni at rochester.rr.com> wrote:


>I don't understand what you're saying.  I designed the program as three
>functions nested within each other.  Are you saying I should be designing it
>differently?  

Yes.  There are some sometimes good reasons to have a recursive function
(i.e., a function that calls itself), but they don't seem applicable here.

> I made it a series of nested functions because, for example, I
>needed to use the "number" variable from ask_number before it was destroyed.
>When a function ends, any variables it has created are destroyed.

The standard way to do that is to return the variable to the caller, which
then uses it.

Here, let me give you an example of how to approach something like this.
I'm going to try to re-use as much of your logic code as possible, so we
can concentrate on the structure rather than the detail pieces.  In
practice, I'd code it somewhat differently, but I don't want to go there
right now.  (We can talk about that after we get the structure down, if
you like.)

You basically have four elements needed here:
 1) an "ask_number" function to find out the number entered by the user;
 2) a "countdown" function to do the countdown;
 3) a function to ask if the user wants to repeat or leave
    (One change I made here is the name; I'll discuss that in a second);
 4) a main routine that puts these all together.

Here's an example of how to do the first function, ask_number:

def ask_number():
    answerOK = False
    while not answerOK:
        number = input("Please enter a number.\n")
        if number > 500 or number - int(number) != 0 or number < 1:
            print "Input positive integers less then 501 only, please."
        else:
            answerOK = True
    return number

The variable "answerOK" controls whether you have a legitimate answer or
not.  It starts out false, but goes true when the user answers with a
number that meets your requirements.  Once it's true, it returns that
number to the caller.

So the caller can just say:

 x = ask_number()

and he's pretty much assured to get a number meeting your specification,
i.e., between 1 and 500.

Again, I'd use a different test for the if statement and a few other
things, but I wanted to preserve as much of your approach as possible.

Now, let's move on to element 2, the countdown.  Your code pretty much
basically works as is:

def countdown (number):
    while number != 0:
        print number
        number = number - 1

There are more Pythonic ways to do this, but let's leave this be.

Now, element 3, the function to ask if the user wants to repeat or leave;
I've made a trivial but important (I think) change here.  You called it
"leave", but the user types 'y' if he *doesn't* want to leave, and 'n' if
he does want to leave.  It makes more sense to describe (and name) the
function not in terms of whether the user wants to leave, but rather
whether he wants to continue.  Also, since the function doesn't actually
do the leaving (or continuing) but just asks the question and finds out, t
makes sense to name it something that reflects that (as you did with
"as_number").

So, I've renamed the function to "ask_continue" instead of "leave".

Again, I'd code this a little differently, but leaving as much of your
code intact, you can come up with something like this:

def ask_continue():
    answerOK = False
    while not answerOK:
        continue_answer = raw_input ("Type 'y' to start over - type 'n' to
exit. ")
        if continue_answer  == "y":
            answerOK = True
        elif continue_answer == "n":
            answerOK = True
        else:
            print "Type either 'y' or 'n' please."
    return continue_answer

Same idea here; "answerOK" is a variable that indicates whether you've
gotten a legit answer, and once you do, it returns it.

Now, to put it all together, you need that fourth element, the main
program that uses all of these.  Now that you've got the blocks, the main
program is pretty straightforward:


def main():
    repeat = "y"
    while repeat == "y":
        limit = ask_number()
        countdown(limit)
        repeat = ask_continue()

This is basically a big loop that repeats until the value of "repeat" is
something other than "y".

The end result here is that, when you're working on the main program, you
can really forget about how the functions work internally.  All you have
to remember is what each one returns.  And, as you work on each function,
you don't have to worry about the other functions at all.  When you are
writing "ask_number" for example, you can make as many changes to it as
you want, and never have to fear that you'll break something in
"countdown," or in the main program.  And, if you later write another
program that needs a prompt for that type of number, you can just copy
this function out and use it.

These two features, code reuse and code isolation, are the major reasons
to use functions.  With the approach you originally posted, the code of
the functions are so interwoven, that you don't get either.  You can't
work on that version of your program other than as a big mass.  By
breaking it down, you've got a bunch of small easy-to-solve problems,
which you can approach individually.

Now, none of the above is gospel, and for each function, there are a lot
of ways to approach it, and Python has some features that would suggest
approaching them in certain ways (what we call "pythonic") that I haven't
done here (because I don't want to throw that at you right now).  For
purposes of this post, don't concentrate too much on how each function
works; look at how the problem has been broken down and how hote solution
has been structured.

Hope this helps.


From gerrit at nl.linux.org  Sun Jan 25 09:49:25 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Sun, 25 Jan 2004 15:49:25 +0100
Subject: compress string of data
In-Reply-To: <bv0gev$2ni$1@nsnmrro2-gest.nuria.telefonica-data.net>
References: <bv0gev$2ni$1@nsnmrro2-gest.nuria.telefonica-data.net>
Message-ID: <20040125144924.GA30813@nl.linux.org>

> How i could compress string of data?.

>>> import zlib
>>> zlib.compress("Hello, world")
'x\x9c\xf3H\xcd\xc9\xc9\xd7Q(\xcf/\xcaI\x01\x00\x1b\xd4\x04i'

http://www.python.org/doc/current/lib/module-zlib.html

Gerrit.



From jepler at unpythonic.net  Thu Jan  1 22:24:06 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Thu, 1 Jan 2004 21:24:06 -0600
Subject: undo and redo ?
In-Reply-To: <20040102023847.78427.qmail@web21326.mail.yahoo.com>
References: <20040102023847.78427.qmail@web21326.mail.yahoo.com>
Message-ID: <20040102032406.GA8304@unpythonic.net>

On Thu, Jan 01, 2004 at 06:38:47PM -0800, black wrote:
> I'm coding with Tkinter and i wonder whether we could get current OS' clipboard available

You're looking for the clipboard_* and selection_* methods of widget
objects.  I've never worked extensively with this, but instead I usually
rely on the way they're handled by the default bindings (which are quite
adequate on Unix, but less so on Windows where people are accustomed to
having cut/copy/paste on the menu, toolbar, and context-menu)

Jeff



From andre.bernemann at gmx.de  Sun Jan 18 17:50:32 2004
From: andre.bernemann at gmx.de (Andre Bernemann)
Date: Sun, 18 Jan 2004 23:50:32 +0100
Subject: Python COM Server with C++
References: <a40573e7.0401151408.341bda2a@posting.google.com>
Message-ID: <6j2fub.c5d.ln@royal.privat.local>

Thank you very much for the help, I got it working with ctypes.

Cheers
Andr?




From mwh at python.net  Mon Jan 19 06:05:29 2004
From: mwh at python.net (Michael Hudson)
Date: Mon, 19 Jan 2004 11:05:29 GMT
Subject: best book: aint no such thing, and encouragement for old coots
References: <mailman.409.1074191840.12720.python-list@python.org>
	<bu8j31$s4c$1@scotsman.ed.ac.uk>
	<pan.2004.01.16.11.58.58.634101@yahoo.com>
Message-ID: <m3vfn86vwn.fsf@pc150.maths.bris.ac.uk>

Samuel Walters <swalters_usenet at yahoo.com> writes:

> | Eddie Corns said |
> > The next step is to read "Structure and Interpretation of Computer Programs"
> > aka SICP and start all over again, in terms of "clearer conceptual vantage
> > point" it just can't be beat.  It's even availabe online somewhere.
> 
> Here:
> http://mitpress.mit.edu/sicp/full-text/book/book.html
> 
> It's the major reason I'm learning scheme.
> I just don't stop hearing good things about this book.

Well, when you think you want a loop and before you know it you've
written:

    (define (my-func arg1 arg2)
      (define (inner var)
         ...

it's probably time to come back to a less spartan programming
language.  I mean, it's good to know that you *can* write loops that
way, but that doesn't mean it actually *is* a good idea.

Cheers,
mwh

-- 
  MARVIN:  Oh dear, I think you'll find reality's on the blink again.
                   -- The Hitch-Hikers Guide to the Galaxy, Episode 12


From computer.problemen at skynet.be  Sat Jan 10 14:26:52 2004
From: computer.problemen at skynet.be (broebel)
Date: Sat, 10 Jan 2004 20:26:52 +0100
Subject: solving a small programm
References: <40004254$0$16669$ba620e4c@news.skynet.be>
	<40004743@usenet01.boi.hp.com>
Message-ID: <40005064$0$1162$ba620e4c@news.skynet.be>

If you look at this as a homework or not is of no interest to me but I like
the way you explained which way to go to find the resolution.
thanks (i solved it in a jiffy now)

"djw" <donald.welch.nospam at hp.com> schreef in bericht
news:40004743 at usenet01.boi.hp.com...
> As this is obviously a class assignment of some sorts, I don't know how
much
> help you are going to get (or should get) in directly writing the code.
> But, what I will say is that you should be able to look at the way the
code
> works now, how it keeps track of how many bills are needed for each
> denomination (200, 100, etc), and apply the same idea to the total number
> of bills required using another variable that is initialized before the
> loop begins.
>
> -d
>
>
> broebel wrote:
>
> > hey,
> >
> > for the real programmers amongst you, this may be really annoying but
I've
> > been learning the language for only two days.
> >
> > this is my problem,
> > in this programm,which already works I now have to make a total count of
> > how many coins are used.
> > this program gives the total per coin. It should be a small peace of
code
> > (as explained in a tutorial i read, without the answer.)that counts the
> > total of all the coins.
> > I ve been searching for two days and for this kind of programm it really
> > seems kind of long.
> >
> > thanks in advance
> >
> > # Een bedrag gepast betalen met zo min mogelijk euromunten
> >
> > bedrag = input ( 'Geef bedrag tussen 0 en 500 eurocent: ' )
> >
> > for munt in 200, 100, 50, 20, 10, 5, 2, 1 :
> >     aantal = 0
> >
> >     while bedrag >= munt :
> >         aantal = aantal + 1
> >         bedrag = bedrag - munt
> >
> >     if aantal > 0 :
> >         print aantal, 'x', munt
> >
> > what i need is:
> > for example
> > the programm gives
> > 68= 50*1
> >        10*1
> >        5*1
> >        2*1
> >        1*1
> > I need an additional code to get the "5" total of all the coins
together.
>




From mhammond at skippinet.com.au  Sat Jan 31 21:29:38 2004
From: mhammond at skippinet.com.au (Mark Hammond)
Date: Sun, 01 Feb 2004 13:29:38 +1100
Subject: Problems embedding Python
In-Reply-To: <Xns9482E9728C0Ct45fs6vve@130.133.1.4>
References: <Xns9482E9728C0Ct45fs6vve@130.133.1.4>
Message-ID: <bvhoao$23lh$1@arachne.labyrinth.net.au>

Psymaster wrote:

> I've tried running scripts from the embedded interpreter but it doesn't 
> work. If I try the same scripts as strings to interpret it works. Here 
> is my program:
...
 > This compiles and links under MSVC 6 but when run crashes. Any help?

You are almost certainly not linking with the correct CRTL.  You *must* 
use the /MD compiler option for release builds, or /MDd for debug builds.

Mark.




From mwilson at the-wire.com  Mon Jan 19 08:31:28 2004
From: mwilson at the-wire.com (Mel Wilson)
Date: Mon, 19 Jan 2004 08:31:28 -0500
Subject: Best way to do this?
References: <100jg9er3qak890@corp.supernews.com>
Message-ID: <ww9CAls/KHqM089yn@the-wire.com>

In article <100jg9er3qak890 at corp.supernews.com>,
Wil Schultz <newz at rekon.org.NOSPAM> wrote:
>I am reading the "Non-Programmers Tutorial For Python" by Josh Cogliati
>http://www.honors.montana.edu/~jjc/easytut/easytut/easytut.html
>
>One of the exercises asks for a program to ask for a password three
>times. Surprisingly this took me much longer that it probably should
>have so I am curious if the following is the easiest way this is done.
>
>*************************************************
>#!/usr/local/bin/python
>
>count = 0
>password = "null"
>
>while count < 3:
>         count = count + 1
>         password = raw_input("what's the pass: ")
>         if password == "mypass":
>                 print "Access Granted"
>                 count = 3
>         else:
>                 if count < 3:
>                         print "Try Again"
>                 else:
>                         print "Too Bad"
>*************************************************

The "obscure" for/else can help:


def get_password (prompt):
    for i in (1, 2, 3):
        password = raw_input (prompt)
        if password == 'mypass':
            return True
        else:
            print "Try Again"
    else:
        print "Too Bad"
        return False



        Regards.        Mel.


From ben.m.davies at baesystems.com  Wed Jan 14 09:32:34 2004
From: ben.m.davies at baesystems.com (Ben Davies)
Date: Wed, 14 Jan 2004 14:32:34 -0000
Subject: pulling set of unique values from a list
Message-ID: <400551c0$1@baen1673807.greenlnk.net>

I need to get [1,2,3] from [1,1,1,2,2,3,3] with as little effort possible
for my CPU (and keyboard).
I'd half expected there to be a list.values method to do this, but there
isn't so I've have had to use a dictionary object:

>>> l=[1,1,1,2,2,2,3,3,3]
>>> dict.fromkeys(l).keys()
[1, 2, 3]

of course another way would be to do it 'by hand' like this:

>>> l=[1,1,1,2,2,2,3,3,3]
>>> values=[]
... for v in l:
...     if not v in values: values.append(v)
>>> values
[1, 2, 3]

personally I prefer the dictionary one-liner, but with the second iterative
way it is probably more obvious what the code is doing (and perhaps more
efficient?).
Is there any better way to do this that I've missed, I was kind of surprised
not to find a values() method on the built-in list type?







From jepler at unpythonic.net  Sat Jan 31 11:14:27 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Sat, 31 Jan 2004 10:14:27 -0600
Subject: Python vs. Io
In-Reply-To: <711c7390.0401301710.4353274@posting.google.com>
References: <711c7390.0401291301.3f95794@posting.google.com>
	<qnkfzdyieg0.fsf@arbutus.physics.mcmaster.ca>
	<711c7390.0401301710.4353274@posting.google.com>
Message-ID: <20040131161426.GA6235@unpythonic.net>

On Fri, Jan 30, 2004 at 05:10:16PM -0800, Daniel Ehrenberg wrote:
> There's still a difference between types and classes in Python. Try
> this in Python:
> 
> >>> x = object()
> >>> x.number = 5
> 
> It raises an error. But the same thing in Io works (which is x :=
> Object clone; x number := 5). To do it in Python, you have to do
> 
> >>> class goodObject(object): pass
> >>> x = goodObject()
> >>> x.number = 5

This is because instances of object don't have a __dict__, but instances
of goodObject do.  Says the new-style objects document:
	Instances of a class that uses __slots__ don't have a __dict__
	(unless a base class defines a __dict__); but instances of
	derived classes of it do have a __dict__, unless their class
	also uses __slots__.

object has slots=[], effectively.  The behavior is much like what you'll
see in the example below:
	class S(object): __slots__ = ['x']
	class T(S): pass

	s = S()
	s.x = 1 # succeeds
	s.y = 2 # fails with exception

	t = T()
	t.y = 3 # succeeds

Now, whether it's good to have __slots__ and __dict__ I can't tell you,
but it's this wrinkle that caused the behavior you saw, not a
"difference between types and classes".

Jeff



From jcarlson at nospam.uci.edu  Fri Jan 23 19:39:42 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Fri, 23 Jan 2004 16:39:42 -0800
Subject: Python & Databases ?
In-Reply-To: <4011bcd6$0$4051$afc38c87@news.optusnet.com.au>
References: <4011bcd6$0$4051$afc38c87@news.optusnet.com.au>
Message-ID: <busf0b$c3j$1@news.service.uci.edu>

Peter Moscatt wrote:

> Will Python work with any of the databases like MySQL... ?
> 
> Pete

There are methods for accessing most every database system through 
Python.  You may want to head to google.com before asking next time.

http://sourceforge.net/projects/mysql-python

  - Josiah


From robin at jessikat.fsnet.co.uk  Mon Jan 19 08:17:12 2004
From: robin at jessikat.fsnet.co.uk (Robin Becker)
Date: Mon, 19 Jan 2004 13:17:12 +0000
Subject: Fw: PDF library for reading PDF files
References: <mailman.464.1074430854.12720.python-list@python.org>
	<Xns9474CBDE9B2D7cpl19ghumspamgourmet@62.153.159.134>
	<100luvhbh3vr75d@corp.supernews.com>
	<oxEOb.96911$Vs3.36407@twister.socal.rr.com>
	<100nlf2b1qjdae2@corp.supernews.com>
Message-ID: <xJp9FKAYj9CAFwd2@jessikat.fsnet.co.uk>

In article <100nlf2b1qjdae2 at corp.supernews.com>, Cameron Laird
<claird at lairds.com> writes
.....
>>No, but ReportLab (the company) has a product separate from reportlab 
>>(the package) called PageCatcher that does exactly what the OP asked 
>>for. It is not open source, however, and costs a chunk of change.
>
>Let's take this one step farther.  Two posts now have
>quite clearly recommended ReportLab's PageCatcher <URL:
>http://reportlab.com/docs/pagecatcher-ds.pdf >.  I
>completely understand and agree that ReportLab supports
>a mix of open-source, no-fee, and for-fee products, and
>that PageCatcher carries a significant license fee.  I
>entirely agree that PageCatcher "read[s] PDF files ...
>and ... extract[s] information from the PDF with it."
>
>HOWEVER, I suspect that what the original questioner
>meant by his words was some sort of PDF-to-text "extrac-
>tion" (true?) and, unless PageCatcher has changed a lot
>since I got my last copy, PDF-to-text is NOT one of its
>functions.  
I suspect Cameron is right. ReportLab does have a product called
pageCatcher, but its main function is to grab individual pages for
reuse. I believe it could be extended to go deeper and mess about with
text streams, but it certainly doesn't do that now and would take some
effort to do properly as text can be complicated in PDF (or postscript).
-- 
Robin Becker


From ny_r_marquez at yahoo.com  Wed Jan 21 12:59:08 2004
From: ny_r_marquez at yahoo.com (R.Marquez)
Date: 21 Jan 2004 09:59:08 -0800
Subject: py2exe 0.5.0 (finally) released
References: <y8s7aeps.fsf@python.net>
	<8a27e309.0401201304.7ee860b0@posting.google.com>
	<1ebr001fkuq85al2i8c26ejceu8qvedmdb@4ax.com>
Message-ID: <8a27e309.0401210959.22a2cacb@posting.google.com>

Wolfgang Strobl <news2 at mystrobl.de> wrote 
> icon_resources works for me, like so:
> 
> setup( windows = ["wxKnife.py",
>     {"script":"wxKnife.py","icon_resources":[(1,"images/app2.ico")]}],
>     console=["installed_updates.py","installed_sw.py"],
>     data_files=[("images",["images/app2.ico",]),]
>     )

That worked.  I see that I need to visit the wiki page now. Thank you.

-Ruben


From claird at lairds.com  Sat Jan  3 09:39:19 2004
From: claird at lairds.com (Cameron Laird)
Date: Sat, 03 Jan 2004 14:39:19 -0000
Subject: Python for Embedded Devices?
References: <efa6f675.0401021920.3bffced0@posting.google.com>
Message-ID: <vvdl0nbogvm74@corp.supernews.com>

In article <efa6f675.0401021920.3bffced0 at posting.google.com>,
Brandon <brandon6684 at yahoo.com> wrote:
>Java seems to have taken off as the platform and language of choice
>for many embedded devices. Would it be feasible for Python(perhaps
>running on an embedded version of Linux) to act in such a capacity.
>Most of my experience with Python has been with Unix-type scripting
>tasks and using it when it is an applications built in scripting, but
>I know some people try to use to build larger complex applications. Is
>the Python interpreter portable and good enough to be used in resource
>constrained devices like cell phones?

Yes.

And no.  Yes, Python is certainly feasible for current
cellular telephones.  I don't see it poised for explo-
sive growth there, but neither for technical defects
nor because of any lack of good wishes on my part.  
'Twould thrill me to write more Python on embedded 
projects.

The one point I'd emphasize when thinking about this
is that "embedded devices" covers a wide range, as I
believe you already know.  Some developers commonly
work with hardware that's far, far more constrained
than are cellular telephones; others, who also program
embedded devices, can't be distinguished from vanilla
Linux coders.
-- 

Cameron Laird <claird at phaseit.net>
Business:  http://www.Phaseit.net


From bkelley at wi.mit.edu  Thu Jan 29 10:26:36 2004
From: bkelley at wi.mit.edu (Brian Kelley)
Date: Thu, 29 Jan 2004 10:26:36 -0500
Subject: Simple Database Package
In-Reply-To: <8089854e.0401290034.4d57a45d@posting.google.com>
References: <mailman.911.1075300017.12720.python-list@python.org>
	<8089854e.0401290034.4d57a45d@posting.google.com>
Message-ID: <401925bb$0$575$b45e6eb0@senator-bedfellow.mit.edu>

Fuzzyman wrote:
> 
> Anyway - I couldn't decide between SQLobject and metakit (I'd already
> seen sqlite but wanted some advuice before I chose one to dive
> into..).
> 
> Anyway - the windows download for SQLobject is zero sized - so I've
> gone for metakit and will have  a play.

To save yourself some headaches, you might want to read my annotated 
metakit documentation:

http://staffa.wi.mit.edu/people/kelley/tutorial/python.html

And make sure you join the metakit mailing list, we are here to help :)

It includes some common gotchas and has example code for you to play with.

Brian



From jcarlson at nospam.uci.edu  Thu Jan 22 15:27:39 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Thu, 22 Jan 2004 12:27:39 -0800
Subject: Ordered dictionary?
In-Reply-To: <leWPb.231$af7.162835@newshog.newsread.com>
References: <leWPb.231$af7.162835@newshog.newsread.com>
Message-ID: <bupbro$r38$1@news.service.uci.edu>

Leif K-Brooks wrote:
> I need to associate a string (key) with an integer (value). A dictionary 
> would do the job, except for the fact that it must be ordered. I also 
> need to look up the value for a specific key easily, so a list of tuples 
> wouldn't work.

How must the dictionary be ordered?  Do you need the keys or the values 
sorted?

  - Josiah


From irmen at -NOSPAM-REMOVETHIS-xs4all.nl  Fri Jan  9 16:01:42 2004
From: irmen at -NOSPAM-REMOVETHIS-xs4all.nl (Irmen de Jong)
Date: Fri, 09 Jan 2004 22:01:42 +0100
Subject: Variable Scope 2 -- Thanks for 1.
In-Reply-To: <dcde6f.0401091247.c17b76e@posting.google.com>
References: <dcde6f.0401091247.c17b76e@posting.google.com>
Message-ID: <3fff16b6$0$315$e4fe514c@news.xs4all.nl>

Jens Thiede wrote:

> I found the querk in my code:
> 
> a = [1, 2, 3];
> b = a;
> b.append(4);

First: please remove the   ;    from the end of your lines...


> b == [1, 2, 3, 4]; # As it should.
> a == [1, 2, 3, 4]; # - Why?
> 
> One would think that b is a referance to a - however I know it's not.

It's not. a and b are both a name (or a reference to) the same
list object [1,2,3].  (notice the subtle difference !)


> Without changing a thing from above, the following is true:
> 
> b = [];
> b.append(5);
> a == [1, 2, 3, 4];
> b == [5];
> 
> How do I avoid accedentaly modifying variables, is this a bug? If not
> why not?

It's not a bug. It's the way Python works :-)

A very important concept with Python is that you don't have variable 
assignment, but name binding. An "assignment statement" binds a name on an 
object, and the object can be of any type. A statement like this:

age = 29

doesn't assign the value 29 to the variable age. Rather, it labels the integer 
object 29 with the name age. The exact same object can be given many names, 
that is, many different "variables" can refer to the same value object:

firstName = login = recordName = "phil"

All three names now refer to the same string object "phil". Because assignment 
in Python works this way, there are also no (type)declarations. You can 
introduce a new name when you want, where you want, and attach it to any 
object (of any type), and attach it to another object (of any type) when you 
feel like it. For instance, if the line above has been executed and we then do

login=20030405

the name login now refers to an int object 20030405, while firstName and 
recordName still refer to the old string "phil".

That's why b in your second example, is changed. b becomes a name for
a different list object (namely, the empty list []). a still refers to
the original list.

HTH,
--Irmen.


From nospam-deets at web.de  Tue Jan 13 10:49:02 2004
From: nospam-deets at web.de (Diez B. Roggisch)
Date: Tue, 13 Jan 2004 16:49:02 +0100
Subject: newbie list handling question
References: <400406F9.40D64EE6@sunpoint.net>
Message-ID: <bu13os$c9oe9$1@ID-111250.news.uni-berlin.de>

> a = [[1, 10], [2, 20], [3, 30]]
> av = []
> 
> for i in a:
>   av.append(i)
> #av = a[:]

here you don't store a _copy_ of the contained list, but a reference
instead. Change av.append(i) to av.append(list(i)), and you should get a
copy of the list.


Diez


From jjl at pobox.com  Fri Jan 16 14:53:03 2004
From: jjl at pobox.com (John J. Lee)
Date: 16 Jan 2004 19:53:03 +0000
Subject: traceback as string
References: <mailman.202.1071593230.9307.python-list@python.org>
	<b16e4ef7.0401150947.43380745@posting.google.com>
Message-ID: <87wu7r657k.fsf@pobox.com>

steve at ferg.org (Stephen Ferg) writes:
[...]
> try:
> 	main1()
> except Exception, e:
> 	print exception_format(e)
[...]

Just a semi-random warning for anybody as stupid as me: "finally:"
blocks do not handle exceptions, so don't expect things like using the
traceback module to work there:

try:
    main1()
finally:
    print exception_format(e)  # WRONG


I spent a long time tracing through the Python source code trying to
track down a non-existent bug in a C extension, thanks to this
misconception.  :-(


John


From fBechmann at web.de  Fri Jan  2 10:48:09 2004
From: fBechmann at web.de (Frank Bechmann)
Date: 2 Jan 2004 07:48:09 -0800
Subject: how to receive a WM_COPYDATA message in wxwindows
Message-ID: <dbc00a99.0401020748.5b6452e7@posting.google.com>

I started to write a SciTe director in python. I had a very basic
communication running in Pythonwin but I disliked the strong mixture
between Pythonwin's basic functionality and the Pythonwin application.

Now I was trying to do the same with wxWindows but I did not find a
way to receive the WM_COPYDATA messages sent from SciTe since there is
no predefined wx-event for WM_COPYDATA and I got completely lost in
the mix of C++/Swig/Python docs and sources. I tried to add my own
event handler like this:

    # wxEVT_COPYDATA = win32con.WM_COPYDATA  <== didn't work too
    wxEVT_COPYDATA = wx.NewEventType()
    def EVT_COPYDATA(win, func):
        win.Connect(-1, -1, wxEVT_COPYDATA, func)

    class CopyDataEvent(wx.PyEvent):
        def __init__(self, data):
            wx.PyEvent.__init__(self)
            self.SetEventType(wxEVT_COPYDATA)
            ...

    class SciCtrlFrame(wx.Frame):
        def __init__(self, logger, scitePath, sciteStartArgs):
            wx.Frame.__init__(self, None, -1, "title")
            ...
            EVT_COPYDATA(self, self.OnCopyData)

but that didn't work. Can someone give me a hint where the wxEventType
is documented or does someone even have an idea how to solve this?

thx in advance.


From tjreedy at udel.edu  Mon Jan 12 22:48:45 2004
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 12 Jan 2004 22:48:45 -0500
Subject: Problem with what raw_input() returns
References: <56f42e53.0401121746.39b9e4db@posting.google.com>
Message-ID: <ooudnb1gkOAF957dRVn-ig@comcast.com>


"sebb" <sebb at linuxcult.com> wrote in message
news:56f42e53.0401121746.39b9e4db at posting.google.com...
> # -*- coding: cp1252 -*-
> one = "??"
> two = one.replace("?","a")
>
> print two # it prints aa as I expected
>
> # -*- coding: cp1252 -*-
> one = raw_input() # When I run the script, I type ??
> two = one.replace("?","a")
>
> print two # it still prints ?? and I want it to print aa
>
> Can someone help me with that problem?
> Thanks

Learn some basic debugging with print, repr, and ==; or if you know it, use
it; or if you did, share results with us ;-)

In particular, use different name for second input, print both before
replace attempt, and use explicit equality tests.
oneb = raw_input()
print repr(one), repr(oneb), one == oneb

Then draw conclusions and possibly make further test according to results.

Terry J. Reedy




From guess at askme.com  Fri Jan 23 10:21:43 2004
From: guess at askme.com (Carmine Moleti)
Date: Fri, 23 Jan 2004 15:21:43 GMT
Subject: Ordered dictionary?
References: <leWPb.231$af7.162835@newshog.newsread.com><f7XPb.9179$7D.3428@fe2.texas.rr.com><slrnc11piq.etj.apardon@trout.vub.ac.be>
	<mailman.680.1074850984.12720.python-list@python.org>
Message-ID: <b_aQb.175158$_P.6157882@news4.tin.it>

Hi Dragos,

> def filterList(p_list, p_value):
>     l_len = len(p_list)
>     l_temp = map(None, (p_value,)*l_len, p_list)
>     l_temp = filter(lambda x: x[1].find(x[0])==0, l_temp)
>     return map(operator.getitem, l_temp, (-1,)*len(l_temp))

> phones_dict = {'jansen' : '0000', 'xxx' : '1111', 'jan2' : '2222'}
> names_list = filterList(phones_dict.keys(), 'jan')
> phones_list = map(phones_dict.get, names_list)

> This extracts from the dictionary the telephone(values) numbers for
> names(keys) starting with 'jan'...

Why you didn't used the string.startswith(...) method?

I wrote this:

d={'carmine':'123456','carmela':'4948399','pippo':'39938303'}
for name,number in d.items():
    if name.startswith('car'):
        print name,number

This also extract from the dictionay all the (name,number) pairs whose
name starts with a given substring ('car' in the example).

Thanks for your answer




From nid_oizo at yahoo.com_remove_the_  Mon Jan 12 11:15:02 2004
From: nid_oizo at yahoo.com_remove_the_ (Nicolas Fleury)
Date: Mon, 12 Jan 2004 11:15:02 -0500
Subject: How to know if a system command doesn't exist?
In-Reply-To: <KxzMb.1692$PK6.16492@nnrp1.uunet.ca>
References: <KxzMb.1692$PK6.16492@nnrp1.uunet.ca>
Message-ID: <8KzMb.1701$PK6.16708@nnrp1.uunet.ca>

Nicolas Fleury wrote:

> Hi,
>     How can I know if a system command doesn't exist?  All the ways I 
> have tried behave like if the system command was existing but returning 
> one.  I don't want to sound provocative, but open in Perl returns an 
> error in a command doesn't exist, so I'm sure we could have an exception 
> in the same case for popen in Python?

Small correction, as far as I can see, Perl's open returns the same 
error if the command returns 1 or doesn't exist.  Same problem there...



From francisgavila at yahoo.com  Sat Jan 10 23:30:17 2004
From: francisgavila at yahoo.com (Francis Avila)
Date: Sat, 10 Jan 2004 23:30:17 -0500
Subject: Providing Default Value for User Input
References: <e3b4dc29.0401101643.3ea15ae3@posting.google.com>
Message-ID: <1001kcqqk9ic2cc@corp.supernews.com>

N?ant Humain wrote in message ...
>I have just begun learning Python so that I can write a simple script
>to make modification of a file used by another Python script easier.
>This file is basically a list of regular expressions. What I want to
>do is allow the user to select one of these regular expressions to
>modify, but I've realized I know of no way to provide a default value
>for user input. I could choose to show the regular expression the user
>has chosen and simply allow the user to retype it and modify it from
>there, but that is time consuming and error prone. Does Python support
>a way to do this? If worse comes to worst, is there a way I could
>write such code on my own without having to write a C-based module
>(I'd like to stick to Python code only since some users will be
>running this script on Windows without a C compiler)?

This question is entirely too vague, because the answer depends entirely
upon your implementation and has nothing to do with Python per se.  I
imagine the answer is pretty simple unless your design is horrible.

As a shot in the dark, why not just look at what the user types?  If it's
something you want to interpret as 'use default' (like just an empty line,
or the letter 'd' or something), then use a default!

E.g.:

choices = dict(a=1, b=2, default=100)
while True:
    print 'Please select:'
    for k,v in choices.items():
        print '%-10s%s' % (k,v)
    input = raw_input('?> ').lower()
    if input == 'd':
        input = 'default'
    try:
        print 'Value of %s is %s' % (input, choices[input])
    except KeyError:
        print 'Item %r not found.' % input
    print


If you're doing a lot of command-oriented input loops, look at the cmd
module, which is pretty handy (I use it quite a bit).
--
Francis Avila




From exarkun at intarweb.us  Fri Jan  9 20:49:01 2004
From: exarkun at intarweb.us (Jp Calderone)
Date: Fri, 9 Jan 2004 20:49:01 -0500
Subject: Python and Jython are kinda different
In-Reply-To: <slrnbvudpe.1qc.ramen@lackingtalent.com>
References: <slrnbvsi8v.78r.ramen@lackingtalent.com> <87wu81jjg2.fsf@pobox.com>
	<slrnbvtlos.h2e.ramen@lackingtalent.com> <8765fkrig3.fsf@pobox.com>
	<slrnbvudpe.1qc.ramen@lackingtalent.com>
Message-ID: <20040110014901.GA4922@intarweb.us>

On Fri, Jan 09, 2004 at 11:11:36PM -0000, Dave Benjamin wrote:
> In article <8765fkrig3.fsf at pobox.com>, John J. Lee wrote:
> > Yes, but it has been specifically noted by GvR (as well as the
> > Jythonistas) that Jython is lacking developers ATM.
> 
> I see.
> 
> >> represented in books and tutorials--just two implementations of the Python
> >> language, we all ought to be more concerned with unifying them. I never see
> >> Jython advertised as a limited subset of Python.
> > 
> > Well, it's *not* a limited subset of CPython 2.1 (apart from tiny
> > differences).
> 
> True. I suppose this brings up the following question: What *is* "Python"?
> Does the concept of Python *today* fit within Jython's feature set? I'd say
> much of it does, but a few things stick out, in order of decreasing
> importance (IMHO):
> 
>  - generators

  All generators can be re-written with classes using the iterator protocol. 
Here's a simple example:


    # As a generator
    def foogen():
        yield 1
        yield 'a'
        yield []

    # As classes using the iterator protocol
    class _FooGenIterator:
        counter = 0

        def next(self): return getattr(self, 'state_%d' % self.counter)()
        def state_0(self): return 1
        def state_1(self): return 'a'
        def state_2(self): return []
        def state_3(self): raise StopIteration

    class FooGen:
        def __iter__(self):
            return _FooGenIterator()

    # Used exactly the same
    for i in foogen(): print i
    for j in FooGen(): print j

>  - properties

  This is getting closer, I think.  More generator, descriptors are pretty
honkin' fundamental these days.  On the other hand, most behavior
acheivable with properties can be achieved with __g/setattr__, albeit it
quite as conveniently.

>  - getattr/getitem behavior (which is even different from CPython 2.1)

  I guess I haven't used Jython enough to know what's going on here.

>  - type factories being classes

  This seems pretty important to me, probably the most important on the
list.  Metaclasses existed before 2.2, but not without writing an extension
module.

>  - dictionary support for "in" keyword

  This seems pretty trivial to me. It's just a transformation of
dict.has_key().

> [snip]
> 
> > I believe GvR said that PyPy might (might!) become a sort of
> > executable standard for Python in the future, though.
> 
> I think that's an impressive idea, but it almost seems like the resources
> spent in keeping PyPy and CPython in parallel could be better spent keeping
> Jython and CPython in parallel, seeing as nobody is calling PyPy "Python"
> currently.
> 

  Can't say I agree here, probably because I don't much care about Java ;)
I think PyPy has a lot more bang for the buck for your average Python
programmer.  Jython might be nice to bring in some of the Java people, or
make some of that Java work easier when you absolutely have to use it, but
for your average Python application, it hardly enters into the picture. 
PyPy, on the other hand opens up a lot of possibilities for future
improvements to the language (because it is easier to prototype new features
in Python than in C) as well as improvements to existing features.


  Jp



From jmob at nospam__unm.edu  Thu Jan 15 21:58:48 2004
From: jmob at nospam__unm.edu (Jason Mobarak)
Date: Thu, 15 Jan 2004 19:58:48 -0700
Subject: Redefining __call__ in an instance
In-Reply-To: <mailman.422.1074212553.12720.python-list@python.org>
References: <mailman.422.1074212553.12720.python-list@python.org>
Message-ID: <CfWdnfFSpaX8zprdRVn-vA@comcast.com>

class SomeThing(object):
   def __call__ (self):
     print 'gnihtemos'

# get a reference to ourself
M = __import__(__name__)

'''
Return the requested class but don't instantiate it, leaves open the 
possibilty that class reference may be need to be stored and instantiate 
later.
'''

def factory(S):
   return getattr(M, S, None)

# A class version that instantiates.

class FactoryError (TypeError): pass

class Factory (object):

   def __new__(cls, name):

     C = getattr(cls, '_call_%s' % (name,), None)
     if C is None:
       raise FactoryError('Nothing know about %s' % (name,))
     cls.__call__ = C

     return object.__new__(cls)

   def _call_SomeThing (self):

     print 'something'

   def __init__(self, n):

     pass


'''
Also, the point of doing this is to make getting a factory class more
convenient.  If you need *args and **kwargs in your factory-lookup
functionality there's no point in using it because it's no longer anonymous.

Consider the following:
'''

def init_factory (S, *args, **kwargs):
   return getattr(M, S, None)(*args, **kwargs)

class Foo:
   def __init__ (self, need, to, know):
     pass

class ooF:
   def __init__ (self, still, need, to, know):
     pass

# So doing:

init_factory('Foo', 'a', 'b', 'c')
init_factory('ooF', 'a', 'b', 'c', 'd')

# Is no different than:

target = None

# ... do stuff with target here ...

if target == 'Foo':
   f = Foo('a', 'b', 'c')
elif target == 'ooF':
   o = ooF('a', 'b', 'c', 'd')

"""
Okay, so a class could have it's __init__ define *args, **kwargs cull 
it's own data. But that's only useful for **kwargs, since otherwise you 
still need to know in the requesting code what kind class is needed, 
unless *args is just an arbitrary tuple of data in which case you could 
just pass a tuple to the class. Still this is a a bit past the point 
because the dictionary data in kwargs could just be passed as a dictory
"""

class Bar:

   def __init__ (self, *args, **kwargs):

     self.arbData = args
     self.sil = None
     self.i = None
     self.con = None

     for (key, val,) in kwargs.items():
       setter = getattr(self, key, None)
       if setter is None:
         setattr(self, key, val)
       else:
         setter(self, val)

   def set_sil (self, d):

     # check sil here
     self.sil = d

   def set_i (self, d):

     # check i here
     self.i = d

   def set_con (self, d):

     # check con here
     self.con = d

   def __call__ (self):
     print self.sil, self.i, self.con

DATA = """sil = foo
i = bar
con = baz
"""

if __name__ == '__main__':

   factory('SomeThing')()()
   Factory('SomeThing')()

   import cStringIO

   fp = cStringIO.StringIO(DATA)

   def g_ki (fp):

     while True:
       L = fp.readline()

       if L == '':
         break

       T = [I.strip() for I in L.split('=', 1)]

       if len(T) != 2:
         yield (T[0], None)
       else:
         yield tuple(T)

   g = g_ki(fp)
   data_dict = {}
   for (key, val,) in g:
     data_dict[key] = val

   init_factory('Bar', **data_dict)()

output = """
gnihtemos
something
foo bar baz
"""


Robert Brewer wrote:
> Robert Ferrell wrote:
> 
>>I'd like to have a factory class that takes a string argument 
>>and returns
>>the appropriate factory method based on that string.  I'd like the
>>instances to be callable.  Like this:
>>
>>fact = Factory('SomeThing')
>>aSomeThing = fact(some args)
>>
>>anotherFact = Factory('SomeThingElse')
>>anotherThing = anotherFact(some other args)
> 
> 
> Perhaps this will give you some ideas:
> 
> 
>>>>class SomeThing(object):
> 
> ... 	pass
> ... 
> 
>>>>def Factory(classname, *args, **kwargs):
> 
> ... 	return globals()[classname](*args, **kwargs)
> ... 
> 
>>>>st = Factory('SomeThing')
>>>>st
> 
> <__main__.SomeThing object at 0x010C0F10>
> 
> 
> If you still want to package that into a class instead of a function
> (and then override __call__), feel free. Obviously, more exception
> checking could be done.
> 
> 
> Robert Brewer
> MIS
> Amor Ministries
> fumanchu at amor.org
> 

-- 
(------------------------------(
  )~~~~~ Jason A. Mobarak ~~~~~~~)
(~~ aether_at_gentoo_dot_org ~~(
  )~~~~ jmob_at_unm_dot_edu ~~~~~)
(------------------------------(


From hameedkhaan at yahoo.com  Thu Jan 22 10:44:20 2004
From: hameedkhaan at yahoo.com (Hameed Khan)
Date: Thu, 22 Jan 2004 07:44:20 -0800 (PST)
Subject: What is object()
Message-ID: <20040122154420.6597.qmail@web61110.mail.yahoo.com>

hi,
  i was reading library refrence manual. there i found
object() function. they says in library refrence that 
        "Return a new featureless object. object() is
a base for all new style classes. It has the methods
that are common to all instances of new style
classes." 

My questions are whats the use of this function and
the object returned by it? and what are new style
classes?.

Thanks,
Hameed Khan

__________________________________
Do you Yahoo!?
Yahoo! SiteBuilder - Free web site building tool. Try it!
http://webhosting.yahoo.com/ps/sb/



From jmob at unm.edu  Tue Jan 13 12:53:42 2004
From: jmob at unm.edu (Jason Mobarak)
Date: Tue, 13 Jan 2004 10:53:42 -0700
Subject: what is best for web development??
In-Reply-To: <e9570f37.0401121052.ed79710@posting.google.com>
References: <f046efac.0401100358.5aa812a0@posting.google.com>
	<87wu80559x.fsf@blakie.riol>
	<f046efac.0401120330.5c2e7c50@posting.google.com>
	<87oet9grqy.fsf@blakie.riol>
	<e9570f37.0401121052.ed79710@posting.google.com>
Message-ID: <bu1buf$smq$1@nunki.unm.edu>

Graham Fawcett wrote:
> Wilk <wilkSPAM at OUTflibuste.net> wrote in message news:<87oet9grqy.fsf at blakie.riol>...
> 
>>ketulp_baroda at yahoo.com writes:
>>
>>
>>>The problem i am facing here is i dont know what to use for
>>>development of the application. I came across many ways to develop web
>>>application in python which I already specified like
>>>i)the cgi module in python
>>>ii)Python Server Pages
>>>iii)Quixote
>>>iv)WebWare
>>>v)Zope etc.
>>>I want to choose such an environment so that i dont have to install
>>>other softwares to run my application.For eg. I think if I develop
>>>using zope then the client also has to install zope to run my software
>>>and i dont want this.
>>
>>When you use one of theses servers, you don't need to install anything
>>else than a classic browser on the client side.
>>On the server side, most of the servers will not need anything else, you
>>can even start without server with the batterie include :
>>BasicHTTPServer (it was somes examples on this list somes days ago).
> 
> 
> Just a guess, but I suspect the OP is using the term "client" in the
> business sense, not the client/server sense; that is, he's trying to
> write a Web application that is easy to deploy on his clients'
> (customers') servers.
> 
> If it has to be a one-shot install, I would suggest a Web server
> written in Python -- Medusa or Twisted, probably -- that you could
> bundle with your Python app. Find a Web app framework that (a) works
> on Medusa or Twisted and (b) has the templating features you
> require/desire.
> 
> I wouldn't jump at using Twisted's app framework (Woven?) on top of
> Twisted's Web server, though. No disrespect intended to the Twisted
> community or their great body of work; it's just that server and
> app-framework are two separate concerns: one day you might want to or
> need to switch Web servers, and you need to know that your framework
> is portable. I'm no Twisted expert: perhaps Woven is indeed portable,
> and a kindly Twisted person will elaborate here.
> 
> -- Graham

You can use Woven with mod_proxy and Apache. Same with Woven's 
successor: Nevow, http://divmod.org/users/slyphon.twistd/nevow/moin.cgi/  .


From user at domain.invalid  Wed Jan 14 18:23:40 2004
From: user at domain.invalid (user at domain.invalid)
Date: Wed, 14 Jan 2004 23:23:40 GMT
Subject: Deleting objects
Message-ID: <c542f8acd755de732c9da8fc39fbb50a@news.teranews.com>

Say I have an object (foo), that contains an
array (bar) of references to other objects.

Now I want to puff some of the objects from the
array so that I remove the array element, and
destroy the oject.

but when I do:

del foo.bar[0]

Python says:
  object doesn't support item deletion

So do I need to define __del__?  And what would I
put there?

What if I wanted to remove the array element
but still have the object exist?

What happens if I succeed in destroying an object
that other objects still think they are referencing?

Thanks,

Toby



From __peter__ at web.de  Sun Jan  4 04:54:06 2004
From: __peter__ at web.de (Peter Otten)
Date: Sun, 04 Jan 2004 10:54:06 +0100
Subject: Filename type (Was: Re: finding file size)
References: <4V4Jb.12709$Vl6.2811218@news20.bellglobal.com>
	<bt3l9i$pog$07$3@news.t-online.com>
	<mailman.45.1073125105.12720.python-list@python.org>
	<bt6c23$c6u$07$1@news.t-online.com>
	<20040103165041.GA31412@nl.linux.org> <3FF740ED.9020909@rogers.com>
	<mailman.68.1073206424.12720.python-list@python.org>
Message-ID: <bt8njq$gvd$00$1@news.t-online.com>

> [Peter Otten]
>> >>I think both filename class and os.path functions can peacefully
>> >>coexist.
> 
> [Gerrit Holl (me)]
>> >Thanks for the links.
>> >(I think they don't, by the way)
> 
> [Mike C. Fletcher]
>> Is that peaceful?  I don't know.  If there's a war, let's be honest,
>> os.path is going to take a good long while to defeat because it's there
>> and embedded directly into thousands upon thousands of scripts and

[Gerrit Holl]
> Sure, I don't think os.path would die soon, it will surely take longer
> than the string module to die. But I think there is a number of places
> where Python could be more object-oriented than it is, and this is one
> of them. The first step in making those modules more object-oriented is
> providing a OO-alternative: the second step is deprecating the old way,
> and the third step is providing only the OO-way. The third step will
> surely not be made until Python 3.0.

I don't think OO is a goal in itself. In addition to the os.path functions'
ubiquity there are practical differences between a path and the general str
class.

While a string is the default that you read from files and GUI widgets, a
filename will never be. So expect to replace e. g.

os.path.exists(somestring) 

with 

os.filename(somestring).exists()

which is slightly less compelling than somefile.exists().

Are unicode filenames something we should care about?
Should filename really be a subclass of str? I think somepath[-1] could
return the name as well.
Should files and directories really be of the same class?

These to me all seem real questions and at that point I'm not sure whether a
filename class that looks like a light wrapper around os.path (even if you
expect os.path to be implemented in terms of filename later) is the best
possible answer.

Peter




From pythonguy at Hotpop.com  Mon Jan  5 01:09:05 2004
From: pythonguy at Hotpop.com (Anand Pillai)
Date: 4 Jan 2004 22:09:05 -0800
Subject: Why does this fail?
References: <vvhdlm72386b3c@corp.supernews.com>
	<vvhkngs7oachad@corp.supernews.com>
Message-ID: <84fc4588.0401042209.60cdb724@posting.google.com>

I could not help replying to this thread...

There are already quite a lot of spider programs existing
in Python. I am the author of one of the first programs of
the kind, called HarvestMan. It is multithreaded and has 
many features for downloading websites, checking links etc. 
You can get it from the HarvestMan homepage at 
http://harvestman.freezope.org. HarvestMan is quite
comprehensive and is a bit more than a link checker or 
web crawler. My feeling is that it is not easy to understand 
for a  Python beginner though the program is distributed
as source code in true Python tradition.

  If you want something simpler, try spider.py. You can get
information on it from the PyPi pages.
 
  My point was that, there is nothing to gain from re-inventing
the wheel again and again. Spider programs have been written in
Python, so you should try to use them rather than writing code
from scratch. If you think that you are having new ideas, then
take the code of HarvestMan(or spider) and customize it or 
improve on it. I will be happy to merge the changes back in the
code if I think they improve the program, if it is for HarvestMan. 

  This is the main reason why developers release programs as
opensource. Help the community, and help yourselves. Re-inventing
the wheel is perhaps not the way to go.

best regards

-Anand


"Dave Murray" <dlmurray at micro-net.com> wrote in message news:<vvhkngs7oachad at corp.supernews.com>...
> Thank you all, this is a hell of a news group. The diversity of answers
> helped me with some unasked questions, and provided more elegant solutions
> to what I thought that I had figured out on my own. I appreciate it.
> 
> It's part of a spider that I'm working on to verify my own (and friends) web
> page and check for broken links. Looks like making it follow robot rules
> (robots.txt and meta field exclusions) is what's left.
> 
> I have found the library for html/sgml to be not very robust. Big .php and
> .html with lot's of cascades and external references break it very
> ungracefully (sgmllib.SGMLParseError: expected name token). I'd like to be
> able to trap that stuff and just move on to the next file, accepting the
> error. I'm reading in the external links and printing the title as a sanity
> check in addition to collecting href anchors. This problem that I asked
> about reared it's head when I started testing for a robots.txt file, which
> may or may not exist.
> 
> The real point is to learn the language. When a new grad wrote a useful
> utility at work in Python faster than I could have written it in C I decided
> that I needed to learn Python. He's very sharp but he sold me on the
> language too. Since I often must write utilities, Python seems to be a very
> good thing since I normally don't have much time to kill on them.
> 
> Dave


From exarkun at intarweb.us  Sun Jan  4 22:44:02 2004
From: exarkun at intarweb.us (Jp Calderone)
Date: Sun, 4 Jan 2004 22:44:02 -0500
Subject: problem with async chat client in windows
In-Reply-To: <btagiv$91o$1@news.gu.se>
References: <btagiv$91o$1@news.gu.se>
Message-ID: <20040105034402.GA4135@intarweb.us>

On Mon, Jan 05, 2004 at 03:02:29AM +0100, Jonas wrote:
> Hi,
> I'm writing a small chat client to learn some python and networking. No 
> problem with the network stuff tho, the problem is when the user should be 
> able to interact and type messages to send. Since I work with windows I 
> can't use the select function 

  Why not?  select works perfectly well on Windows.

  See http://www.twistedmatrix.com/

  Jp



From michael at foord.net  Thu Jan 29 03:22:26 2004
From: michael at foord.net (Fuzzyman)
Date: 29 Jan 2004 00:22:26 -0800
Subject: Cross Platform Browser Launcher
References: <mailman.939.1075315090.12720.python-list@python.org>
Message-ID: <8089854e.0401290022.67ce3cae@posting.google.com>

Stephan Deibel <sdeibel at wingide.com> wrote in message news:<mailman.939.1075315090.12720.python-list at python.org>...
> Hi,
> 
> On Wed, 28 Jan 2004, Pieter Claerhout wrote:
> > Take a look at the webbrowser module...
> > http://www.python.org/doc/current/lib/module-webbrowser.html
> 
> I submitted a patched webbrowser module with substantial improvements
> a while back.  I'm hoping this can make it into Python 2.4 so please
> try it out:
> 
> http://python.org/sf/728278
> 
> Thanks!
> 
> Stephan Deibel
> 

Thanks for all your help guys - I've downloaded the updated module to
have a look at it.

Certainly using the standard module :

from webrowser import open as openbrow
openbrow('help.html')

works under windows !
'm a bit worried about not being able to supply an absolute path... am
wondering if the current working directory will always get set
correctly on other platforms.....

Hmmm... to be fair - I'm not sure how likely my application is to be
run on anything other than windows.

Thanks.

Fuzzy


> --
> Wing IDE for Python
> Archaeopteryx Software, Inc
> Take Flight!
> 
> www.wingide.com
> 
> > 
> > Cheers,

[snip..]


From francisgavila at yahoo.com  Fri Jan  9 15:30:17 2004
From: francisgavila at yahoo.com (Francis Avila)
Date: Fri, 9 Jan 2004 15:30:17 -0500
Subject: convert a list to a string
References: <3FFE1E29.20801@hotmail.com> <7xwu81dcr7.fsf@ruckus.brouhaha.com>
	<3FFE21A4.7040208@hotmail.com>
Message-ID: <vvu3si6bak1de1@corp.supernews.com>

Bart Nessux wrote in message <3FFE21A4.7040208 at hotmail.com>...
>Forgot to say thanks! the number[0] thing is great!

Here's something a bit more mysterious, but sometimes convenient, e.g. with
struct (which always returns a tuple):

>>> a, = [1] #note trailing comma
>>> a
1

--
Francis Avila



From haim at babysnakes.org  Wed Jan 21 09:40:02 2004
From: haim at babysnakes.org (Haim Ashkenazi)
Date: Wed, 21 Jan 2004 16:40:02 +0200
Subject: py2exe error
Message-ID: <bum304$m18$1@sea.gmane.org>

Hi

(complete newbie warning...:) )

I've written a script that uses pickle to store data to a file. here's the
code that stored the data:

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

    def put(self, conf):
        """ dump the preferences to a file"""
        
        # TODO: make a backup copy of the prefs !!!!
        try:
            f = open(self.bacFile, "w")
        except:
            raise 'BadFileError', "couldn't write file"
            
        pickle.dump(conf, f)
        f.close()

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

when running from regular python interperter, it works fine.

I need this script to run without python installed, so I've created a
stand-alone binary with py2exe. I used the following simple setup.py:

from distutils.core import setup
import py2exe

setup(name = 'default',
      version = '0.1.0',
      console = ["CLI_Backup.py"],
      windows = ["Configurator.py"]
)
-------------------------

when running from this binary I get this error:
Traceback (most recent call last):
  File "MainFrame.pyc", line 140, in OnSaveMenuEvent
  File "MainFrame.pyc", line 174, in dumpPrefs
  File "NS_Backup.pyc", line 64, in put
  File "pickle.pyc", line 1382, in dump
  File "pickle.pyc", line 231, in dump
  File "pickle.pyc", line 293, in save
  File "pickle.pyc", line 663, in save_dict
  File "pickle.pyc", line 677, in _batch_setitems
  File "pickle.pyc", line 293, in save
  File "pickle.pyc", line 514, in save_unicode
LookupError: no codec search functions registered: can't find encoding
-----------------------------

I guess I should add some custom module to the setup.py but I don't know
which (or am I completely off track here...).

can someone help?

thanx
--
Haim





From bolo at coco.ro  Mon Jan 19 07:38:45 2004
From: bolo at coco.ro (Florian Preknya)
Date: Mon, 19 Jan 2004 14:38:45 +0200
Subject: overwrite private method... (of wxColumnSorterMixin class)
Message-ID: <bugj2p$vqj$1@nebula.dnttm.ro>

Is there a posibility to overwrite a private method (one that starts with
__ ) ? I read that they are just formely private, they are prefixed with the
class name to have an obtured visibility, so maybe it's a trick here...

More details...
I use wxPython, more specifically the wxColumnSorterMixin class. I want to
overwrite the __OnColClick event handler to behave on my way: I want the
sorting feature will affect only some columns, not all columns and that
event handler is the key. The problem is that the event chain is skiped in
the __OnColClick method, so I cannot receive the event anymore. So, my idea
was to overwrite the __OnColClick method in the mixin subclass. Is this
possible? Or, are they other solutions for this ?

Thanks,
Florian.




From missive at frontiernet.net  Mon Jan 19 10:44:42 2004
From: missive at frontiernet.net (Lee Harr)
Date: Mon, 19 Jan 2004 15:44:42 GMT
Subject: FreeBSD 4.8 and Python-2.2.3 compiling error
References: <mailman.484.1074467779.12720.python-list@python.org>
Message-ID: <slrnc0nukh.2tkb.missive@homer.easthighschool.net>

On 2004-01-18, Taylor Leese <tleese22 at yahoo.com> wrote:
> I'm hoping somebody can point me in the right
> direction. I am getting this error when trying to
> compile Python-2.2.3 on FreeBSD 4.8:
>

Are you building from ports?  ie..

cd /usr/ports/lang/python22
make

?



From donald.welch.nospam at hp.com  Fri Jan  9 15:42:14 2004
From: donald.welch.nospam at hp.com (djw)
Date: Fri, 09 Jan 2004 12:42:14 -0800
Subject: python newbie
References: <3ffddcfd$0$16662$ba620e4c@news.skynet.be>
	<5unrvv8u1vpske1j464epj4aff0f54k2nf@4ax.com>
	<UilLb.1570$nt4.1692@attbi_s51>
	<gLrLb.5136380$Of.812373@news.easynews.com>
Message-ID: <3fff1245@usenet01.boi.hp.com>

Joe Francia wrote:

> d wrote:
>> Worked fine for me on Linux... made two suggested changes: 1) use
>> raw_input(), not input(), 2) check user input for errors. Sorry, I don't
>> know how to say "Enter a number between 0 and 500" in whatever language
>> this is in (German?)
>> 
> 
> You're a Python user and you don't recognize Dutch?!?!  For shame... ;>)

Well, I was only off by one country - not too bad for someone who took 4
years of high school Spanish and can hardly speak a word of it. 

I was looking at the code that I proposed to the OP, and wondered if this
wasn't better:

#!/usr/bin/env python
while 1:
    bedrag = raw_input ( 'Geef bedrag tussen 0 en 500 eurocent: ' )
    try:
        bedrag = int( bedrag )
        if bedrag < 0 or bedrag > 500:
            raise ValueError
    except ValueError:
        print "Enter a number between 0 and 500" # In DUTCH, of course!
    else:
        break
    
# ... etc.


Is this good style, that is, to put multiple items inside a single try:
except: else: block? Seems more compact and tidy than my first try.

-d





From max at alcyone.com  Mon Jan 19 06:32:26 2004
From: max at alcyone.com (Erik Max Francis)
Date: Mon, 19 Jan 2004 03:32:26 -0800
Subject: adding elements to python tuples
References: <bugels$6u$1@news.rz.uni-karlsruhe.de>
Message-ID: <400BC04A.C7FA9E9E@alcyone.com>

Uwe Mayer wrote:

> is it possible to append new elements to a tuple? I know tuples are
> immutable and that this would mean to create a new tuple with one more
> element, but how do you do it?

Just use the + operator:

>>> a = (1, 2, 3)
>>> a + (4,)
(1, 2, 3, 4)
>>> a
(1, 2, 3)
>>> a += (4, 5)
>>> a
(1, 2, 3, 4, 5)

-- 
 __ Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
/  \ San Jose, CA, USA && 37 20 N 121 53 W && &tSftDotIotE
\__/ Here day fights with night.
    -- (the last words of Victor Hugo)


From davidb at mcs.st-and.ac.uk  Sat Jan 24 14:25:04 2004
From: davidb at mcs.st-and.ac.uk (David Boddie)
Date: 24 Jan 2004 11:25:04 -0800
Subject: any news client in Python?
References: <2b4c49e0.0401230915.3438810f@posting.google.com>
Message-ID: <4de76ee2.0401241125.45e77f9e@posting.google.com>

pygeek at yahoo.com (Daniel Han) wrote in message news:<2b4c49e0.0401230915.3438810f at posting.google.com>...
> hello everybody.
> 
> i've been looking around for a decent newsreader (not rss)
> that's written in Python. Strange, but i found none so far,
> i've been to sf.net, freshmeat.net, and even googled that,
> still nothing interesting.

I don't know exactly what you mean by "decent" so it's difficult to be
confident that you'll like what's available.

To start with, there's the NewsFlash (tknf) newsreader:

    http://www.python.org/ftp/python/contrib-09-Dec-1999/Network/

I wrote my own newsreader for a minority platform, too:

    http://www-solar.mcs.st-and.ac.uk/~davidb/Software/Python/NewsRead/

There are probably others lurking in FTP archives.

I have to admit that my own attempt isn't exactly the best example you
could hope for. My excuse is that I had to create my own widget set at
the same time as writing the application. If I still had to use it, I
would probably rewrite it, or at least refactor it severely.

David


From tad at tadland.net  Wed Jan 21 15:43:28 2004
From: tad at tadland.net (Tad Marko)
Date: 21 Jan 2004 12:43:28 -0800
Subject: Need help with Python class idioms
Message-ID: <f5c5dc88.0401211243.7e81a26b@posting.google.com>

Howdy!

I'm trying to get my head around Python and I've come to realize that
there are a lot of idioms in Python that are a bit different than in
other languages. I have a class similar to what I've included below.
The only difference is that in the real class, I have even more
mandatory attributes. Too many to specify at once on a constructor and
they don't always exist at construction time anyway, so the accessor
idiom must remain.

Can anyone suggest a more Pythony way to do the following?

Thanks,
Tad

#!/bin/env python

class A:
    def __init__(self):
        self.mandatoryVar1 = None
        self.mandatoryVar2 = None

    def setMV1(self, mv1):
        self.mandatoryVar1 = mv1

    def setMV2(self, mv2):
        self.mandatoryVar2 = mv2

    def saveToDB(self, db):
        if self.mandatoryVar1 == None:
            raise Exception, "Mandatory Var 1 not set."
        if self.mandatoryVar2 == None:
            raise Exception, "Mandatory Var 2 not set."

        # Using db, do whatever saving stuff is needed.


From devrim at machsim.com  Sat Jan 17 14:32:31 2004
From: devrim at machsim.com (Devrim Erdem)
Date: 17 Jan 2004 11:32:31 -0800
Subject: Python class derived from a C++ base class
Message-ID: <b2f253f2.0401171132.6e86eb1a@posting.google.com>

Hello,

[Warning-Python beginner]

My application has a c++ plugin interface. To create a plugin, a class
is derived from the Plugin class and compiled into a shared object (
so or dll ).

I would like to allow writing plugins also in python. It is very
comfortable if the plugin developer could derive a python class from
the C++ base class.

I am not well educated to think an elegant and a robust way to do
this.

I would appreciate any hints.

Thanks in advance,

Devrim.


From marco at bubke.de  Sat Jan 31 10:48:30 2004
From: marco at bubke.de (Marco Bubke)
Date: Sat, 31 Jan 2004 16:48:30 +0100
Subject: numarray and NumarrayType
Message-ID: <bvgiof$jpp$1@graf.cs.uni-magdeburg.de>

Hi

I have a little problem mit numarrays type. I want to get the Type but its
noch the right one. If I array.typecode() I get the right one but there is
not a typecode for all types. I geht the same type fer float and double?

Thats wrong. Its a bug by me or numarray?

Here is the code. The array is of type 'Float32" but I get tFloat64.

    cdef int numarray_type
    numarray_type = NA_NumarrayType(flat_array)
    if numarray_type == tFloat32:
      self.type = GL_FLOAT
    elif numarray_type == tFloat64:
      self.type = GL_DOUBLE
    elif numarray_type == tUInt32:
      self.type = GL_UNSIGNED_INT
    elif numarray_type == tInt32:
      self.type = GL_INT
    elif numarray_type == tUInt16:
      self.type = GL_UNSIGNED_SHORT
    elif numarray_type == tInt16:
      self.type = GL_SHORT
    elif numarray_type == tUInt8:
      self.type = GL_UNSIGNED_BYTE
    elif numarray_type == tInt8:
      self.type = GL_BYTE
    else:
      assert 0, "can't convert numarray type to opengl type"

regards

Marco


From fumanchu at amor.org  Mon Jan 19 12:13:32 2004
From: fumanchu at amor.org (Robert Brewer)
Date: Mon, 19 Jan 2004 09:13:32 -0800
Subject: A lazy-committing database object with curry?
Message-ID: <DE1CF2B4FEC4A342BF62B6B2B334601E561C3A@opus.amorhq.net>

Tim Lesher wrote:
> I'm writing a database helper class that represents records in a SQL
> database as objects.  I want to be able to instantiate the objects
> (from the database), play with their values locally, then lazily
> commit the changes all at once (via an explicit commit call).  Other
> than the call to Commit(), I don't want clients of this class to have
> to think about the fact that there's a database behind it all--there
are
> some interesting and non-obvious dependencies on the particular values

> that are committed together, and I want to hide that in the Commit()
call.
> 
> 8< curry code snipped >8
> 
> Are there any pitfalls to doing this?  Am I being dazzled by the shiny
> new toy that is currying?  Is there another simple solution, or a
> refinement of this one, that I'm not seeing?

I have to admit I've never thought of using currying for that. My usual
approach in such a situation is to have an additional object attribute
which acts as a flag for whether or not the object is "finished".
Commit() could then be called at any time, but it won't actually do
anything if instance.finished is False. It reads clearer to me than all
the currying:


class SomeRecordType(object):
    def __init__(self, title, description):
        self.title = title
        self.description = description
        self.finished = False

    def Commit(self):
        if self.finished:
            Do_database_commit(self)

foo = myDb.LookupTitleRecord('some title')
foo.description = 'bar'
foo.Commit()             # not updated in the DB yet
foo.finished = True
foo.Commit()             # now updated in the DB

Incidentally, this allows other threads to do the Commit calls for you,
on a schedule. So your client code wouldn't need to call Commit() at all
if the app is persistent.


Robert Brewer
MIS
Amor Ministries
fumanchu at amor.org



From thelastmohiccan at yahoo.com  Mon Jan 26 03:27:46 2004
From: thelastmohiccan at yahoo.com (lenk)
Date: Mon, 26 Jan 2004 10:27:46 +0200
Subject: Zope
Message-ID: <bv2j13$n4oug$1@ID-216549.news.uni-berlin.de>

Hi
I installed zope in suse 9.0(own package).but i can t find start to 
start the server .
/opt/zope/ ... is it a right path ?

second problem
Can you give an web example for python (forum,gueastbook ...)
links pls:)

thanks for all



From arjen.dijkstraNoSpam at hccnet.nl  Mon Jan 19 06:35:57 2004
From: arjen.dijkstraNoSpam at hccnet.nl (duikboot)
Date: Mon, 19 Jan 2004 12:35:57 +0100
Subject: adding elements to python tuples
References: <bugels$6u$1@news.rz.uni-karlsruhe.de>
Message-ID: <400bc126$0$137$e4fe514c@dreader8.news.xs4all.nl>

Maybe you could use this?

>>> d=(1,2,3,4)
>>> e=5,
>>> d=d+e
>>> d
(1, 2, 3, 4, 5)


Regards,

Arjen


"Uwe Mayer" <merkosh at hadiko.de> schreef in bericht
news:bugels$6u$1 at news.rz.uni-karlsruhe.de...
> Hi,
>
> is it possible to append new elements to a tuple? I know tuples are
> immutable and that this would mean to create a new tuple with one more
> element, but how do you do it?
>
> i.e. i have  (1,2,3) and want to append 4:
> (1,2,3,4) instead of ((1,2,3),4)
>
> I wanted to use it as a return value of a function and an assignment, but:
>
> (a,b,c),d = myfunc()
>
> doesn't look nice to me. I intended to have
>
> a,b,c,d = myfunc()
>
> Thanks for any suggestions.
> Ciao
> Uwe
> --
>




From bik.mido at tiscalinet.it  Tue Jan 27 03:20:05 2004
From: bik.mido at tiscalinet.it (Michele Dondi)
Date: Tue, 27 Jan 2004 09:20:05 +0100
Subject: perl bug File::Basename and Perl's nature
References: <7fe97cc4.0401242131.22acf485@posting.google.com>
	<tmqa10d6a542ma6k1ao6tnupvj0gbtser7@4ax.com>
Message-ID: <31va10lja5i7nqggpigd7c92676ua9m7h3@4ax.com>

On Mon, 26 Jan 2004 20:45:19 +0100, I wrote:

[OT, slightly edited]

>>you'll see that it shouldn't be so. AND, the writting as usuall is
>>fantastic incompetent. To illustrate, i quote:
>
>Haha, thanks! I'll make that a .sig!

I guess it is fair to point out my own errors:

>Also, you may have noticed it, but this is a discussion group about
       ^^^^^^^^^^^^^^^^^^^^^^^

This should be "you may *not* have noticed it".

>*Perl* and people here is highly likely to be fond of Perl, appreciate
                        ^^

*are*


Michele


From tim.one at comcast.net  Fri Jan 30 23:30:28 2004
From: tim.one at comcast.net (Tim Peters)
Date: Fri, 30 Jan 2004 23:30:28 -0500
Subject: NEWLINE character problem
In-Reply-To: <20040130144254.GA29356@intarweb.us>
Message-ID: <LNBBLJKPBEHFEDALKOLCEELJIKAB.tim.one@comcast.net>

[Dragos Chirila]
>> I have a string and I want to split it by NEWLINE character.
>>
>> It is knowned that "Microsoft Windows, Apple's Macintosh OS and
>> various UNIX, all use different characters to mark the ends of lines
>> in text files. Unix uses the linefeed (ASCII character 10), MacOS
>> uses the carriage return (ASCII character 13), and Windows uses a
>> two-character sequence of a carriage return plus a newline". So,
>> PLEASE don't tell me to use 'split' by '\n' because it won't work.

[Jp Calderone]
> s.splitlines()

Woo hoo!  Jp is right, and I never realized that splitlines() looks for all
of \n, \r\n, and \r line endings.

>>> 'a\nb\rc\r\n'.splitlines()
['a', 'b', 'c']
>>> 'a\nb\rc\r\n'.splitlines(True)
['a\n', 'b\r', 'c\r\n']
>>>

That's certainly Pythonic <wink>.




From mwh at python.net  Wed Jan 14 06:34:38 2004
From: mwh at python.net (Michael Hudson)
Date: Wed, 14 Jan 2004 11:34:38 GMT
Subject: Parsing c-code
References: <bu2uoj$8pc$1@piggy.rz.tu-ilmenau.de>
Message-ID: <m3r7y2wype.fsf@pc150.maths.bris.ac.uk>

"tm" <js.bach at web.de> writes:

> are there recommended modules for parsing c-code.

I think the most sane way is to use gccxml (google for it) and parse
the output of that.  This still leaves you with quite a lot of work to
do, but is probably less terrifying (caveat: I haven't done this
myself).

Cheers,
mwh

-- 
  [3] Modem speeds being what they are, large .avi files were
      generally downloaded to the shell server instead[4].
  [4] Where they were usually found by the technical staff, and
      burned to CD.                                   -- Carlfish, asr


From pythongnome at hotmail.com  Fri Jan 30 16:51:37 2004
From: pythongnome at hotmail.com (Lucas Raab)
Date: Fri, 30 Jan 2004 21:51:37 GMT
Subject: pythonwin woes
References: <a7c2c93c.0401301309.4e61c606@posting.google.com>
Message-ID: <JlASb.3616$GO6.3283@newsread3.news.atl.earthlink.net>


"oliver" <fwang2 at yahoo.com> wrote in message
news:a7c2c93c.0401301309.4e61c606 at posting.google.com...
> Hi,
>
> I am trying my hands on the latest verion of pythonwin extension with
> python 2.3.3 , and run into *semi-fatal* problem:  the run command
> ignores the modifications I made to the source code,  and *always*
> show me results given by that outdated source: it feels like it just
> use that cached .pyc!!!
>
> I wonder if the other pythonwin users had experienced the same
> problem, or did I miss anything here. There is no such problem in IDLE
> though.
>
> Thanks
>
> oliver
A while ago, I had the same exact problem. It always ran the outdated file.
I had to delete the old .pyc file to get it to run correctly. I'm running
Python 2.3.3 like you only I'm using build 157 and it seems to work just
fine. I had to go through a few versions before it went away with build 157.
Try emailing Mark Hammond and see if he had any suggestions.
-- 
"Victorious warriors win first and then go to
war, while defeated warriors go to war first
and then seek to win."
Sun-tzu, The Art of War. Strategic Assessments




From max at alcyone.com  Wed Jan  7 07:43:57 2004
From: max at alcyone.com (Erik Max Francis)
Date: Wed, 07 Jan 2004 04:43:57 -0800
Subject: Why " ".some_string is often used ?
References: <Xns94698A5566736stefninnospamyahoofr@213.228.0.4>
Message-ID: <3FFBFF0D.696FA6DC@alcyone.com>

"St?phane Ninin" wrote:

> Is there a reason to do instead of just returning join(text.split()) ?
> why concatenate " " to the string and not just returning the string
> instead ?

Because they're not the same thing unless you've already done

	from string import join

first.  join is not a builtin function.

-- 
 __ Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
/  \ San Jose, CA, USA && 37 20 N 121 53 W && &tSftDotIotE
\__/ I get my kicks above the wasteline, sunshine
    -- The American, _Chess_


From gerrit at nl.linux.org  Sun Jan  4 10:10:33 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Sun, 4 Jan 2004 16:10:33 +0100
Subject: Find out username and UID/GID
In-Reply-To: <bt99it$qed$06$1@news.t-online.com>
References: <bt99it$qed$06$1@news.t-online.com>
Message-ID: <20040104151033.GA15726@nl.linux.org>

Florian Lindner wrote:
> how can I find out the username and it's UID and GID on a linux system,
> using the most recent python version? If possible, without the use of extra
> libraries.

>>> import os
>>> import pwd
>>> os.getuid()
500
>>> os.getgid()
500
>>> pwd.getpwuid(500)
('gerrit', 'x', 500, 500, 'Gerrit Holl', '/home/gerrit', '/bin/bash')

I think there is a simpler way for the last one in the docs, but I'm not
entirely sure.

yours,
Gerrit.

-- 
188. If an artizan has undertaken to rear a child and teaches him his
craft, he can not be demanded back.
          -- 1780 BC, Hammurabi, Code of Law
-- 
Asperger's Syndrome - a personal approach:
	http://people.nl.linux.org/~gerrit/english/



From none at none.com  Tue Jan 13 14:28:38 2004
From: none at none.com (Derek)
Date: Tue, 13 Jan 2004 14:28:38 -0500
Subject: Why learn Python ??
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<btubno$bd8k6$1@ID-46268.news.uni-berlin.de>
	<100655fo84c2211@corp.supernews.com>
	<btv7gf$btv1p$1@ID-46268.news.uni-berlin.de>
	<87d69og2jl.fsf@pobox.com>
	<bu0v9v$c6nr4$1@ID-46268.news.uni-berlin.de>
	<873cajafr8.fsf@pobox.com>
Message-ID: <bu1gt7$cn6mk$1@ID-46268.news.uni-berlin.de>

"John J. Lee" wrote:
> [...]
> > Point taken.  I once worked on a project where we
> > implemented a production system in C++ and then
> > implemented it again in Python for QA purposes.  It took
> > about 150k lines of C++ code and 10k lines of Python.
> > Python took less code because so many modules are bundled
> > with the language, but the C++ system ran many times
> > faster.  It's all about picking the right tool for the
> > job.
>
> Well, that's a banal truism obscuring the fact that, for the
> great majority of projects, optimisation does not require
> implementation of the *entire* system in a language like
> C++.  The sum of C++ and Python is greater than the parts.

Python and C++ can also be a bigger mess than sum of either part.
Take your pick.




From __peter__ at web.de  Sun Jan 11 04:18:52 2004
From: __peter__ at web.de (Peter Otten)
Date: Sun, 11 Jan 2004 10:18:52 +0100
Subject: Problem in directory working
References: <92ed2954.0401102257.565dd6f4@posting.google.com>
Message-ID: <btr46n$jjr$07$1@news.t-online.com>

Gyoung-Yoon Noh wrote:

> I've written Unix's find-like function using recursive os.listdir()
> call and generator expression. It seems that error happens in
> generator expression.
> Below codes do not work. walk.next() generates StopIteration.
> When I replace 'yield' with 'print', it works fine.
> 
> Why this does not work?
> I've had successively implemented unix-find using os.path.walk().
> But I want to combine recursive call and generator expressions.
> 
> Any comments are welcome.
> 
> 
> [snip]
> import os
> 
> def find(path):
>     if not os.path.exists(path):
>         raise StopIteration
>     if os.path.isdir(path):
>         for l in os.listdir(path):
>             fullpath = os.sep.join((path, l))
              for p in find(fullpath):
                  yield p
>     else:
>         yield path
> 
> if __name__=='__main__':
>     #find('/home/myhome'); raise SystemExit()
>     walk = find('/home/myhome')
>     for i in walk:
>         print i.next()

Just writing find(somepath) will create a new generator but only yield a
value when its next() method is called. This is done implicitly by the for
loop I inserted into your code. Do you know about 2.3's new os.walk()? It
would make a good building block for routines scanning the file system.

Peter


From squirrel at WPI.EDU  Thu Jan  8 20:26:55 2004
From: squirrel at WPI.EDU (Christopher T King)
Date: Thu, 8 Jan 2004 20:26:55 -0500
Subject: xrange() syntactic sugar
Message-ID: <Pine.LNX.4.58.0401082004550.6192@ccc5.WPI.EDU>

Okay, so this is really two requests in one, and they're both kinda
outlandish, but I'm gonna post them nonetheless:

I've always thought xrange() to be ugly; it looks to be a lot of typing
just to get an efficient loop over some numbers. Since it uses the same
'parameters' as the slice operator, I was thinking it would be neat if the
slice operator were to be syntactic sugar for the xrange operator.
Example:

for i in xrange(0,8,2):
	pass

is equivalent to

for i in 0:8:2:
	pass

Being the syntactic sugar it is, it does nothing but save typing (and
those extra colons do look slightly messy), but it does help unify the
syntax a bit. Now part two:

xrange() objects become an acceptable list index, operating as a slice
operator does. Example:

a[0:8:2] is equivalent to a[xrange(0,8,2)]

Since (correct me if I'm wrong) xrange()s just hold the three numbers
given them, this part (at least) shouldn't be too difficult to implement.
This would then allow the unification to be complete, so a[0:8:2] is
really the list 'a' being indexed by an xrange() object. Therefore a
change in the implementation would be fully backward compatible.

This type of indexing is slightly reminiscent of that of Matlab. I'm not
sure if the new xrange syntax would cause parsing problems; it might in a
statement such as:

for a in 0:8:
2:
	pass

But I doubt that would be a problem, so long as the parser gobbles up as
much as it can.

Just a humble RFC. Don't reject me too harshly, I know it's a kinda silly
feature to request :) I just wanna give it a try.


From sross at connectmail.carleton.ca  Thu Jan  8 21:33:22 2004
From: sross at connectmail.carleton.ca (Sean Ross)
Date: Thu, 8 Jan 2004 21:33:22 -0500
Subject: Pesky reverse()
References: <3t3svvs7ni8l8jnn1l1v60oogirqoaa85f@4ax.com>
Message-ID: <_noLb.81639$BA6.1706329@news20.bellglobal.com>

<engsolnom at ipns.com> wrote in message
news:3t3svvs7ni8l8jnn1l1v60oogirqoaa85f at 4ax.com...
> I need to use the built-in method 'reverse', but notice strange behavior.

[snip]

> new_list = my+list  # should save a 'forward' copy, right? Nope
> my_list.reverse() actually reverses both copies, since Python is a bit too
> helpful sometimes, and I understand why.
>
> So the question is, how do I get a forward and reverse list?

>>> forward = range(10)
>>> reverse = forward[:]   # copy
>>> reverse.reverse()
>>> print forward
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
>>> print reverse
[9, 8, 7, 6, 5, 4, 3, 2, 1, 0]
>>>

HTH
Sean




From fumanchu at amor.org  Fri Jan  2 13:31:19 2004
From: fumanchu at amor.org (Robert Brewer)
Date: Fri, 2 Jan 2004 10:31:19 -0800
Subject: undo and redo ?
Message-ID: <DE1CF2B4FEC4A342BF62B6B2B334601E561BB8@opus.amorhq.net>

Somebody asked:
> > anyone can inspires me how we can
> > achieve undo and redo function ?

Diez B. Roggisch replied:
> When working with a MVC-approach, the actions you the user 
> can invoke on the
> model could be created as objects that know how to undo/invert their
> effects. Then you store a list of these actions and 
> performing undo takes
> the last action and apply its inverted action to your model. 


An excellent point of inspiration can be found via the GoF:
http://www.amazon.com/exec/obidos/ASIN/0201633612

Synopsis/discussion at:
http://c2.com/cgi/wiki?CommandPattern


FuManChu



From philh at invalid.email.address  Sun Jan  4 00:19:43 2004
From: philh at invalid.email.address (phil hunt)
Date: Sun, 4 Jan 2004 05:19:43 +0000
Subject: Text-to-HTML processing program
References: <slrnbvcm32.122.philh@cabalamat.cabalamat.org>
	<JZqdnSmWjK7nd2uiRVn-hg@comcast.com>
Message-ID: <slrnbvf8jf.62c.philh@cabalamat.cabalamat.org>

On Sat, 03 Jan 2004 11:05:54 -0500, Jeff Schwab <jeffplus at comcast.net> wrote:
>phil hunt wrote:
>> Does anyone know of a text-to-HTML processing program, ideally
>> written in Python because I'll probably be wanting to make small
>> modifications to it, which is simple and straightforward to use
>> and which uses a simple markup language (something like Wikipedia
>> markup would be ideal)?
>
>How about troff?  Or if you really want to keep it simple, why not use 
>the <pre> tag in HTML?

I wasn't aware troff did HTML output.

>Or if you really want to keep it simple, why not use
>the <pre> tag in HTML? 

Yuk. 

-- 
"It's easier to find people online who openly support the KKK than 
people who openly support the RIAA" -- comment on Wikipedia
(Email: <zen20000 at zen.co.ku>, but first subtract 275 and reverse 
the last two letters).  




From nhodgson at bigpond.net.au  Sat Jan 17 17:59:27 2004
From: nhodgson at bigpond.net.au (Neil Hodgson)
Date: Sat, 17 Jan 2004 22:59:27 GMT
Subject: Retrive unicode keys from the registry
References: <brp3bzwj.fsf@python.net>
	<KSXNb.15179$Wa.2061@news-server.bigpond.net.au>
	<1xpzaa8i.fsf@python.net>
	<69ZNb.15222$Wa.2798@news-server.bigpond.net.au>
	<40086EE5.7020708@v.loewis.de>
Message-ID: <j7jOb.16549$Wa.4760@news-server.bigpond.net.au>

Martin v. L?wis:

> I believe the story would be completely different for the registry: the
> wide registry functions are available on all Windows versions, AFAIK.

   The documentation for RegQueryValue says:
""" Unicode: Implemented as Unicode and ANSI versions. Note that Unicode
support on Windows Me/98/95 requires Microsoft Layer for Unicode. """

   Neil




From carroll at tjc.com  Fri Jan  9 14:30:42 2004
From: carroll at tjc.com (Terry Carroll)
Date: Fri, 09 Jan 2004 19:30:42 GMT
Subject: urllib - changing the user agent
References: <8089854e.0401090509.3dd74859@posting.google.com>
Message-ID: <n20uvvshb3mnj53qlbfto1fofamnomj88g@4ax.com>

On 9 Jan 2004 05:09:41 -0800, michael at foord.net (Fuzzyman) wrote:

 [ wants to change the user-agent in HTTP request from urllib ]

Fuzzy --

I take the easy way out, and use urllib2, instead:

    url = "http//www.spam.com/eggs.html"
    req_headers = {
        'User-Agent': 'Mozilla/4.0 (compatible; MSIE 5.5; Windows NT)',
        }
    req = urllib2.Request(url, None, req_headers)




From mwh at python.net  Thu Jan  8 15:47:32 2004
From: mwh at python.net (Michael Hudson)
Date: Thu, 8 Jan 2004 20:47:32 GMT
Subject: books
References: <3FFDC029.AB0A4097@unet.univie.ac.at>
Message-ID: <m3k742182k.fsf@pc150.maths.bris.ac.uk>

Thomas Mang <a9804814 at unet.univie.ac.at> writes:

> Hello,
> 
> I have programmed mostly in C++ lately, and I want to start learning
> Python now.
> 
> Which books would you recommend to buy?

Well, maybe, none.  Have you tried the online material? 

    http://www.python.org/topics/learn

and in particular

    http://www.python.org/topics/learn/prog.html

> I am both looking for an introduction into the language, as well as
> complete guides.

For the "complete guide", what I've seen of Python in a Nutshell is
pretty good.  But I actually don't own any books on Python (well apart
from the one I tech reviewed).

Cheers,
mwh

-- 
  For their next act, they'll no doubt be buying a firewall 
  running under NT, which makes about as much sense as 
  building a prison out of meringue.                     -- -:Tanuki:-
               -- http://home.xnet.com/~raven/Sysadmin/ASR.Quotes.html


From jmvw at wwwcomm.com  Thu Jan 22 10:49:49 2004
From: jmvw at wwwcomm.com (Michiel)
Date: 22 Jan 2004 07:49:49 -0800
Subject: Problems using ZSI web service from .NET
Message-ID: <1c9f633a.0401220749.29755bea@posting.google.com>

Hello,

I am not sure this is the right place to ask. I tried the ZSI mailing
list, but got no response there.

My goal is to write some web services with ZSI to be used by a client
written in .NET. I'm using ZSI 1.2.7 (this was easy to install on my
Debian system).

I have no problem with functions with parameters and return values
with simple types, but I am having a hell of a time moving a simple
array.

My web service is taken from the zsi examples:

______________________________
#!/usr/bin/python

def echo(s):
    return s

from ZSI import dispatch
dispatch.AsCGI()
______________________________


I want to invoke the echo function with an array of strings as a
parameter and I want it to give me an array back. I had a lot of
trouble putting together a WSDL file that was properly imported by
Visual Studio (without turning my string arrays into single strings),
but with the help of many google searches, I finally came to a
description with the following schema:

______________________________
        <schema
            targetNamespace="https://secure6.wwwcomm.com/admin/soap/DomainKiller/bin/DomainKiller.xsd"
            xmlns="http://www.w3.org/2001/XMLSchema"
        >
          <complexType name="ArrayOfString"> 
             <complexContent> 
               <restriction base="soapenc:Array"> 
                  <sequence> 
                    <element name="item" type="string" minOccurs="0"
                      maxOccurs="unbounded" nillable="true"/> 
                  </sequence> 
                  <attribute ref="soapenc:arrayType"
wsdl:arrayType="xsd:string[]"
xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/"/>
              </restriction> 
            </complexContent> 
          </complexType> 
        </schema>
______________________

For brevity, I've left out the rest of the wsdl file. Messages for
parameters and return value of echo are defined as having the above
type ArrayOfString.

Now, it seems that ZSI doesn't like what my .NET client is sending it.

Request from .NET app:

______________________________________________
<?xml version="1.0" encoding="utf-8" ?>
<soap:Envelope 
  xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" 
  xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/"
  xmlns:tns="https://secure6.wwwcomm.com/admin/soap/DomainKiller/bin/DomainKiller.wsdl"
  xmlns:types="https://secure6.wwwcomm.com/admin/soap/DomainKiller/bin/DomainKiller.wsdl/encodedTypes"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
  xmlns:xsd="http://www.w3.org/2001/XMLSchema" >

  <soap:Body soap:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
    <echo>
      <s href="#id1" />
    </echo>
    <soapenc:Array id="id1" soapenc:arrayType="xsd:string[2]">
      <Item>s1</Item>
      <Item>s2</Item>
    </soapenc:Array>
  </soap:Body>

</soap:Envelope>
_______________________________________________

The response from the ZSI cgi:

_______________________________________________
<SOAP-ENV:Envelope
  xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/"
  xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xmlns:xsd="http://www.w3.org/2001/XMLSchema"
  xmlns:ZSI="http://www.zolera.com/schemas/ZSI/" 
  SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" >
<SOAP-ENV:Body>
<SOAP-ENV:Fault>
<faultcode>SOAP-ENV:Client</faultcode>
<faultstring>Unparseable message</faultstring>
<detail>
<ZSI:ParseFaultDetail>
<ZSI:string>Any cannot parse untyped element</ZSI:string>
<ZSI:trace>/soap:Envelope/soap:Body/soapenc:Array/Item[1]</ZSI:trace>
</ZSI:ParseFaultDetail>

</detail>
</SOAP-ENV:Fault>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>
_________________________________________________


For comparison, a simple ZSI client works fine and this is the dialog:

_________________________________ Tue Jan 20 13:38:34 2004 REQUEST:
<SOAP-ENV:Envelope
  xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/"
  xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xmlns:xsd="http://www.w3.org/2001/XMLSchema"
  xmlns:ZSI="http://www.zolera.com/schemas/ZSI/" 
  SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" >
<SOAP-ENV:Body>
<echo>
<E403ee28c SOAP-ENC:arrayType="xsd:anyType[3]">
<SOAP-ENC:string id="401f8b00">1</SOAP-ENC:string>
<SOAP-ENC:string id="40219520">2</SOAP-ENC:string>
<SOAP-ENC:string id="40219560">3</SOAP-ENC:string>
</E403ee28c>
</echo>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>

_________________________________ Tue Jan 20 13:38:36 2004 RESPONSE:
Date: Tue, 20 Jan 2004 18:38:35 GMT
Server: Apache/1.3.26 Ben-SSL/1.48 (Unix) Debian GNU/Linux PHP/4.1.2
mod_perl/1.26
Content-Length: 664
Content-Type: text/xml; charset="utf-8"

<SOAP-ENV:Envelope
  xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/"
  xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xmlns:xsd="http://www.w3.org/2001/XMLSchema"
  xmlns:ZSI="http://www.zolera.com/schemas/ZSI/" 
  SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" >
<SOAP-ENV:Body>
<echoResponse>
<E4050908c SOAP-ENC:arrayType="xsd:anyType[3]">
<SOAP-ENC:string id="404ea950">1</SOAP-ENC:string>
<SOAP-ENC:string id="404eaa10">2</SOAP-ENC:string>
<SOAP-ENC:string id="404eaae8">3</SOAP-ENC:string>
</E4050908c>
</echoResponse>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>

_____________________________________


It seems the arguments to echo have types here. 

Can I get .NET to do the same? Can this be done through the WSDL file?
Or else, how can I send arrays back and forth?

Thank you,

Michiel van Wessem


From sebb at linuxcult.com  Tue Jan  6 20:04:19 2004
From: sebb at linuxcult.com (sebb)
Date: 6 Jan 2004 17:04:19 -0800
Subject: Getting strange characters in the command prompt
Message-ID: <56f42e53.0401061704.523f394@posting.google.com>

For information, I have windows xp (english edition).

When I use special non-english characters (like ? ? ? ...) in my
python code, IDLE tells me to add a line like:

# -*- coding: cp1252 -*-

... because of the presence of non-ASCII characters.

When I write a script like the folowing:

# -*- coding: cp1252 -*-
print "? ? ?"

... and I run it in the windows command prompt, I get strange
characters I didn't ask for.

And when I write those non-English characters (? ? ?) directly in the
command prompt, I get the correct characters.

Can anyone help we with that problem?


From exarkun at intarweb.us  Thu Jan 15 18:17:04 2004
From: exarkun at intarweb.us (Jp Calderone)
Date: Thu, 15 Jan 2004 18:17:04 -0500
Subject: Binary strings, unicode and encodings
In-Reply-To: <265368cb.0401151138.37a3a47b@posting.google.com>
References: <265368cb.0401151138.37a3a47b@posting.google.com>
Message-ID: <20040115231704.GA23935@intarweb.us>

On Thu, Jan 15, 2004 at 11:38:39AM -0800, Laurent Therond wrote:
> Maybe you have a minute to clarify the following matter...
> 
> Consider:
> 
> ---
> 
> from cStringIO import StringIO
> 
> def bencode_rec(x, b):
>     t = type(x)
> 
>     if t is str:
>         b.write('%d:%s' % (len(x), x))
>     else:
>         assert 0
> 
> def bencode(x):
>     b = StringIO()
> 
>     bencode_rec(x, b)
> 
>     return b.getvalue()
> 
> ---
> 
> Now, if I write bencode('failure reason') into a socket, what will I get
> on the other side of the connection?
> 
> a) A sequence of bytes where each byte represents an ASCII character

  Yes.

> 
> b) A sequence of bytes where each byte represents the UTF-8 encoding of a
> Unicode character

  Coincidentally, yes.  This is not because the unicode you wrote to the
socket is encoded as UTF-8 before it is sent, but because the *non*-unicode
you wrote to the socket *happened* to be a valid UTF-8 byte string (All
ASCII byte strings fall into this coincidental case).

> 
> c) It depends on the system locale/it depends on what the site module
> specifies using setdefaultencoding(name)

  Not at all.  'failure reason' isn't unicode, there are no unicode
transformations going on in the example program, the default encoding is
never used and has no effect on the program's behavior.

  bencode_rec has an assert in it for a reason.  *Only* byte strings can be
sent using it.  If you want to send unicode, you'll have to encode it
yourself and send the encoded bytes, then decode it on the other end.  If
you choose to depend on the default system encoding, you'll probably end up
with problems, but if you explicitly select an encoding yourself, you won't.

  Jp



From fumanchu at amor.org  Wed Jan  7 01:57:44 2004
From: fumanchu at amor.org (Robert Brewer)
Date: Tue, 6 Jan 2004 22:57:44 -0800
Subject: Problem: 'Threads' in Python?
Message-ID: <DE1CF2B4FEC4A342BF62B6B2B334601E561BCF@opus.amorhq.net>

Ralph Sluiters wrote:
> You did everything, but not answer my question. I know what 
> cookies are, but
> I don't need cookies here. And you said in your answer "start 
> background
> process", that was my question. How can I start a background process.
> 
> But I've solved it now,

And the answer was...? <:O


FuManChu, who doesn't know how long he can hold his breath... :)



From alert at notification.messagelabs.com  Tue Jan 27 09:38:42 2004
From: alert at notification.messagelabs.com (alert at notification.messagelabs.com)
Date: 27 Jan 2004 14:38:42 -0000
Subject: WARNING. You sent a potential virus or unauthorised code
Message-ID: <20040127143842.15430.qmail@server-23.tower-27.messagelabs.com>

For English instructions please scroll down.

ISION MailScan hat einen potenziellen Virus 
oder eine verd?chtige Datenstruktur in einer 
von Ihnen verschickten oder an Sie 
gesendeten Nachricht entdeckt. 
____________________________________________________________

Einige Informationen zu der infizierten eMail
____________________________________________________________
Zur besseren Identifikation der Nachricht:

Der Absender der Nachricht war: 
    python-list at python.org

Der Empf?nger der Nachricht war: 
    alice at spiegel.de

Der Betreff war: 'Hi'
Die Nachricht wurde verschickt am Tue, 27 Jan 2004 14:31:22 +0100
Um die Nachricht genauer zu identifizieren:

Scanner 7 (Unpacker) berichtet folgendes:
>>> W32/MyDoom.A in '510178_3X_AZ-S_PA2__message.doc=R46.scr'


Die Originalnachricht ist in den ISION Quarant?ne_Server umgeleitet 
worden, in 
mail server server-23.tower-27.messagelabs.com (id 510178_1075214322)
und wird dort f?r 30 Tage gespeichert bevor sie endg?ltig gel?scht wird.
____________________________________________________________

Weitere Hilfe
____________________________________________________________
Lesen Sie bitte die haeufig gestellten Fragen (
FAQ)  fuer eine solche Situation unter
http://www.ision.net/mailscan/faq
Hier werden die meisten Ihrer Fragen 
beantwortet. 
Wenn Sie weitere Informationen ben?tigen 
oder glauben, dass es sich um einen falschen 
Alarm handelt, kontaktieren Sie bitte das 
ISION Customer Interaction Center unter

support at ision.net

Sollten Sie mit dem Support in Kontakt treten, 
geben Sie bitte immer die nachfolgende Virus 
Identifikationsnummer an:
{{{ mail server server-23.tower-27.messagelabs.com (id 510178_1075214322) }}}
______________________________________

Diese Nachricht wurde von ISION MailScan 
unter Nutzung des MesssageLabs Virus Control 
Centers auf  alle bekannten Viren untersucht. 
Wenn Sie mehr ?ber diese Dienstleistung 
erfahren m?chten, besuchen Sie
http://www.ision.net/mailscan/faq
_________________________________________________________________

*************************ENGLISH*********************************
ISION Mailscan discovered a possible
virus or unauthorised code (such as a joke program or trojan)
in an email sent by you.

Please read this whole email carefully. It explains what has
happened to your email, which suspected virus has been caught,
and what to do if you need help.

____________________________________________________________

Some details about the infected message
____________________________________________________________

To help identify the email:

The message was titled 'Hi'
The message date was Tue, 27 Jan 2004 14:31:22 +0100
The message identifier was (empty)
The message recipients were 
    alice at spiegel.de


To help identify the virus:

Scanner 7 (Unpacker) reported the following:

>>> W32/MyDoom.A in '510178_3X_AZ-S_PA2__message.doc=R46.scr'


The message was diverted into the virus holding pen on
mail server server-23.tower-27.messagelabs.com (id 510178_1075214322)
and will be held for 30 days before being destroyed.


____________________________________________________________

What should you do now?
____________________________________________________________

If you sent the email from a corporate network, you should first
contact your local Helpdesk or System Administrator for advice.
They will be able to help you disinfect your workstation.

If you sent the email from a personal or home account, you will
need to disinfect your computer yourself. To do this you will
need an anti_virus program. We suggest using one of the leading
industry anti_virus packages such as McAfee, F_Secure or Cybersoft,
which cost ?15_?30 per copy.
____________________________________________________________

Getting more help
____________________________________________________________

You may like to read the Support FAQs at
http://www.ision.net/english/mailscan/faq 
These will answer many of the most common queries.

If you believe this message to be a false alarm or you require
further assistance, you can email ISION UK Support at:_

   	support at ision.net.uk

or contact ISION Internet by telephone on:_

	+44 (0) 208 293 73 00 

Please quote the following Virus Pen ID when contacting Support.
{{{ mail server server-23.tower-27.messagelabs.com (id 510178_1075214322) }}}

________________________________________________________________________
This email has been scanned for all viruses by the MessageLabs Email
Security System. For more information on a proactive email security
service working around the clock, around the globe, visit
http://www.messagelabs.com
________________________________________________________________________



From nhodgson at bigpond.net.au  Wed Jan 21 14:57:45 2004
From: nhodgson at bigpond.net.au (Neil Hodgson)
Date: Wed, 21 Jan 2004 19:57:45 GMT
Subject: Jython and SciTE
References: <Xns94777EDCF72A2whiteywidowyahoocom@216.77.188.18>
Message-ID: <ZQAPb.22316$Wa.10261@news-server.bigpond.net.au>

rt lange:

> I'm trying to get SciTE to run and compile my jython scripts.
> This is what I have in my python.properties file:
>
> command.name.1.*.py=Go Jython
> command.1.*.py=jython $(FileNameExt)
> command.1.subsystem.*.py=1
> command.name.2.*.py=Jython -> jar
> command.2.*.py=jythonc --core --jar $(FileName).jar $(FileNameExt)
> command.2.subsystem.*.py=1
>
> I keep getting as output:
>
> >jython DiceRoll.py
> >The system cannot find the file specified.

   Depending on the OS and the type of command (batch, exe, python script)
"jython" is you may need to execute through the command interpreter which is
cmd on NT:

command.1.*.py=cmd /c jython $(FileNameExt)

   Neil




From antonmuhin at rambler.ru  Mon Jan 19 13:39:40 2004
From: antonmuhin at rambler.ru (anton muhin)
Date: Mon, 19 Jan 2004 21:39:40 +0300
Subject: Delayed evaluation and setdefault()
In-Reply-To: <buh6j1$bub$1@news.tudelft.nl>
References: <buh6j1$bub$1@news.tudelft.nl>
Message-ID: <buh8er$hbr9n$1@ID-217427.news.uni-berlin.de>

Leo Breebaart wrote:

> Hi all,
> 
> I have a question about Python and delayed evaluation.
> 
> Short-circuiting of Boolean expressions implies that in:
> 
>    >>> if a() and b():
> 
> any possible side-effects the call to b() might have will not
> happen of a() returns true, because then b() will never be
> executed.
> 
> However, if I go looking for dictionary keys like this:
> 
>    >>> d = {}
>    >>> d.setdefault('foo', b())
> 
> then b() *does* get executed regardless of whether or not the
> value it returns is actually used ('foo' was not found) or not
> ('foo' was found). 
> 
> If b() has side-effects, this may not be what you want at all. It
> would seem to me not too exotic to expect Python to have some
> sort of construct or syntax for dealing with this, just as it
> supports Boolean short-circuiting.
> 
> So I guess my question is twofold: one, do people think
> differently, and if so why?; and two: is there any elegant (or
> other) way in which I can achieve the delayed evaluation I desire
> for setdefault, given a side-effect-having b()?
> 

It's normal---setdefault is just a method and its parameters get 
evaluted before the call occur. If you want this kind of lazy 
evaluation, I'd suggest something like this ('foo' in d) or 
(d.setdefault('foo', b()). If you want your value too, it gets even 
trickier.

Actually, if you really need this kind of functionality, it might be 
worth defining a function.

def lazysetdefault(d, key, func):
   if key not in d:
     d[key] = func()()
   return d[key]

lazysetdefault(d, 'foo', lambda: b())

However, are you real sure you need it?

regards,
anton.



From noemail at noemail4u.com  Mon Jan 12 07:56:36 2004
From: noemail at noemail4u.com (Dang Griffith)
Date: Mon, 12 Jan 2004 12:56:36 GMT
Subject: need help translating a PHP for statement to python
References: <a015bde3.0401100050.3e6b58c9@posting.google.com>
	<mailman.260.1073726548.12720.python-list@python.org>
Message-ID: <944baf3371667ab5b21f6020c57ad385@news.teranews.com>

On Sat, 10 Jan 2004 20:22:18 +1100, "Eli Pollak" <none at none.com>
wrote:

>Haha ... you must be originally a perl coder. Who else writes attricious
>code like this
>    if ($bar = (($x_ar[$x] -= $prd + $bar) < 0))

Any C programmer worth his salt.  I miss those days.  Sort of.
    --dang


From pmagic at snet.net  Wed Jan 14 21:39:04 2004
From: pmagic at snet.net (paul m)
Date: Wed, 14 Jan 2004 21:39:04 -0500
Subject: ProtoCiv: porting Freeciv to Python CANNED
In-Reply-To: <Xns94711BBF5F7D6JanC@213.119.4.35>
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
	<pan.2004.01.14.01.17.00.970198@fakeemail.com>
	<bu2ana$bmpci$1@ID-207230.news.uni-berlin.de>
	<Xns94711BBF5F7D6JanC@213.119.4.35>
Message-ID: <bu4uf4$3ri9$1@netnews.upenn.edu>

JanC wrote:
> 
> You think "cross-platform" means "it runs out-of-the-box on all possible 
> platforms that ever existed, now exist, and will ever exist"?
> 
> Please go searching and come back when you find 1 (one) program which fits 
> that definition...  :-p
> 

vi might come close... ;-)

--Paul M



From jjl at pobox.com  Wed Jan 14 15:08:37 2004
From: jjl at pobox.com (John J. Lee)
Date: 14 Jan 2004 20:08:37 +0000
Subject: C++ bad-mouthing (was: Why learn Python ??)
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<7xisjh1e3i.fsf@ruckus.brouhaha.com>
	<10064loqc7sd7e3@corp.supernews.com>
	<7xeku496wx.fsf@ruckus.brouhaha.com>
	<donn-9D2291.16343412012004@nntp6.u.washington.edu>
	<7xhdz08xgy.fsf@ruckus.brouhaha.com> <1073978329.887910@yasure>
	<87brp7agl7.fsf@pobox.com> <7xvfnfmzy8.fsf@ruckus.brouhaha.com>
Message-ID: <878yka2sze.fsf@pobox.com>

Paul Rubin <http://phr.cx at NOSPAM.invalid> writes:

> jjl at pobox.com (John J. Lee) writes:
> > > But at any rate, I thought we were talking about huge projects
> > > involving many programmers, and I don't think Grail was of that
> > > sort at all.
> > 
> > Right.  Wasn't it a research project?  In any case, hardly a
> > large-scale programming effort along the lines of Mozilla!
> 
> Grail wasn't huge but I think any serious browser qualifies as
> substantial.

True, though not on the same scale as Zope, for example (or the others
I list below).


> If you're saying it didn't really fail but actually
> wasn't even seriously attempted,

Not sure what the goals were, but I'm not sure they were to compete
with Netscape and IE.  CNRI funding -- "R" for research -- seems to
imply I do remember correctly (one of us should really check the facts
here... oh well, it's USENET ;-).

Do correct me if I'm wrong, but you seem to imply, in saying "wasn't
even seriously attempted", that if Grail wasn't intended to be a
Netscape-replacement, it must have had no purpose at all.  That's
certainly not obvious to me.


> ok, that's even fewer substantial
> programs that have even been tried in Python.

The project stopped, according to the tarball, because CNRI didn't
want to allocate more money to it because of low usage compared to,
the big two of the day.  Given that, what do we learn from Grail?

Well, what does the *existence* of Grail tell us (along with
similar-size projects like Mailman)?  It tells us that projects at
least that large are feasible.  What does the *ending* of Grail
development tell us about Python's suitability for development of
large projects?  Not a lot: all we know is that it *didn't* run into
the problems that afflict large-scale projects (if you believe the
tarball README, anyway).

Others provided (in a different bit of the thread) at least one
example of a much larger system, solving a problem that would take a
best-estimate of on the order of a million lines of C++ code if solved
in C++.  Other people posted examples in an thread last year:
eg. Peter Hansen with another project the same size as Zope (there
have been lots of other threads too, by the look of it -- but I
haven't scoured those for examples).  Twisted is at least that big,
too (according to pycount.py run on the old version of Twisted that's
sitting on my hard drive -- again, it seems to spit out multiple total
lines, so I hope it's working right...!).

Of course, the above two paragraphs (implicitly) points out the big
joke here: it seems hard to dispute that reducing the number of lines
of code needed by an order of magnitude is a good way of reducing risk
on big projects.  Now, what sort of language would you pick to achieve
that?  C++ or Java?  Or Lisp or Python?

not-holding-my-breath-for-your-answer-<wink>-ly y'rs,


John


From ajsiegel at optonline.com  Wed Jan 21 15:20:17 2004
From: ajsiegel at optonline.com (Arthur)
Date: Wed, 21 Jan 2004 20:20:17 GMT
Subject: [Numpy-discussion] Status of Numeric
References: <CEELJPECNGEGKFNDLHFFGEBKCCAA.perry@stsci.edu>
	<mailman.533.1074574795.12720.python-list@python.org>
	<bumghc$dsb$1@nrc-news.nrc.ca>
Message-ID: <vpmt0058gq2hj2q8jh8pakm9d80eridvmv@4ax.com>

On Wed, 21 Jan 2004 13:31:01 -0500, "Humpty Dumpty"
<oliver.schoenborn at utoronto.ca> wrote:

>
>"Paul Dubois" <paul at pfdubois.com> wrote in message
>news:mailman.533.1074574795.12720.python-list at python.org...
>> Having two array classes around is a terrible idea. Once you have two
>> popular array classes the entire world bifurcates. This plot package
>
>I second that vehemently.
>
>> I only suggested we do numarray because Numeric was, by general
>> agreement, unmaintainable.  It was hard to work on and lacked the kind
>> of robustness necessary to get permission to put it in the core. We all
>> agreed Numeric would cease. Let's stick to the plan.
>
>However, I think experience has shown that users tend to go for better
>performance rather than better design.
>
>So why couldn't Numeric be redesigned for maintainability, but keep the
>algorithms that make it more performant than numarray?  Does the interface
>need to change?
>
>Oliver
>

>From where I sit, these look like very important questions in regard
to Python's future.

I certainly have no answers.

Paul seems to mention that one of the goals of numarray was to achieve
something clean and maintainable enough to move to a module of the
Python core distrtibution..  

Which, to me, seems like a worthy goal. 

On the other hand, it would seem that the goal of something to move
into the core would be performance optimized at the range of array
size most commonly encountered.  Rather than for the extraodrinary,
which seems to be the goal of numarray, responding to specific needs
of the numarray development team's applications.

Has the core Python development team given out clues about their
feelings/requirements for a move of either Numeric or numarray into
the core? 

It concerns me that this thread isn't trafficked.

Is it that folks feel that the stauts quo: an actively maintained 3rd
party package for numerical operations on multidimensional arrays, is
adequate.  With numarray to replace Numeric as the standard. And
performance nuances relatively unimportant.

I see nothing terrible about that position, and hope that that is the
tacit measage of the lack of respoonse to the thread.

Certainly folks can't be considering the global issues here simply
unimportant.

Art


From bcd at pvv.ntnu.no  Wed Jan 14 09:16:02 2004
From: bcd at pvv.ntnu.no (Bent C Dalager)
Date: Wed, 14 Jan 2004 14:16:02 +0000 (UTC)
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<n22Nb.11299$9k7.210522@news.xtra.co.nz>
	<bu2pgs$d123a$1@ID-207230.news.uni-berlin.de>
	<4004EC9E.1E2E2893@alcyone.com>
Message-ID: <bu3iv2$n2u$4@tyfon.itea.ntnu.no>

In article <4004EC9E.1E2E2893 at alcyone.com>,
Erik Max Francis  <max at alcyone.com> wrote:
>
>If you're saying that you've come to the realization that volunteer
>programers on a project with which you only have a passing interest
>won't follow your orders and do whatever you say, I'd say pointing that
>out is less like "denigration" and more like "common goddamn sense."

It is, never the less, worth pointing out. It would seem that Brandon
entered the scene with an idea that OSS developers might be incredibly
useful to him for some reason or other. Other game developers might
very well have the same idea. When Brandon finds out that this is not
the case and describes in some detail why OSS won't do the job for
him, than this can certainly be useful for other game developers to
learn so that don't have to spend 6 months figuring out the exact same
thing themselves.

The conclusion may seem obvious to _you_ but this is no guarantee that
everyone else also possesses this knowledge. OSS is being hailed as
the second coming, and it comes as no surprise therefore that some
people might be deluded into thinking they could harness this power to
cure cancer overnight or land a man on Mars by 2005.

Cheers
	Bent D
-- 
Bent Dalager - bcd at pvv.org - http://www.pvv.org/~bcd
                                    powered by emacs


From jcribbs at twmi.rr.com  Thu Jan 29 23:33:24 2004
From: jcribbs at twmi.rr.com (Jamey Cribbs)
Date: Fri, 30 Jan 2004 04:33:24 GMT
Subject: Printing From Python
In-Reply-To: <8089854e.0401290555.501f0695@posting.google.com>
References: <8089854e.0401290555.501f0695@posting.google.com>
Message-ID: <o8lSb.4314$Jf2.1197@fe1.columbus.rr.com>

Fuzzyman wrote:

> Any 'print' modules out there - that implement cross platform printing
> interfaces ?

Well, this solution isn't cross platform, it isn't written in Python, 
and it isn't free, but I have used it quite a bit and it works great (on 
Windows, at least).

Rpv (http://www.rpvreport.com) is a report generator that is totally 
unlike Crystal Reports or other products.  To me, it fills a great niche 
between complex, gui-designer report writers like Crystal, and the other 
end of the spectrum such as trying to format text as an html document 
and then doing an external call to your web browser.

Basically, Rpv is a program that will read a text file that your program 
creates that will have all of the data that you want to print.  It then 
reads a template file (another text file) that you create beforehand, 
which tells it how to format the report, where to place the data from 
the text file, where the headers go, etc.

So, basically the steps I use in a program to let the user print data are:

1).  Create the text file containing the data.
2).  Do an external call to Rpv, passing it the name of the text file 
and the name of the template file.
3).  Rpv then opens up a nice print preview window that shows the user 
what the report will look like with all of the data included.
4).  The user can then press the print button in the preview window and 
print the report.

Combined with pygtk (or wxPython), it makes your application look 
professional.

And Rpv is pretty cheap.  I think I paid something like $40 for an 
royalty free version that lets me use it and distribute the runtime to 
all my customers.

Also, I have absolutely no connection to the makers of Rpv, I just 
really like their product.

Hope this helps.

Jamey


From cookedm+news at physics.mcmaster.ca  Mon Jan 12 21:51:00 2004
From: cookedm+news at physics.mcmaster.ca (David M. Cooke)
Date: Mon, 12 Jan 2004 21:51:00 -0500
Subject: building strings with variable input
References: <pduMb.6321$g4.137247@news2.nokia.com>
	<400273B8.E991F41D@alcyone.com>
	<qnkd69pp4ph.fsf@arbutus.physics.mcmaster.ca>
	<4002F93D.298A2394@alcyone.com>
Message-ID: <qnk4qv0pnmz.fsf@arbutus.physics.mcmaster.ca>

At some point, Erik Max Francis <max at alcyone.com> wrote:

> "David M. Cooke" wrote:
>
>> In which case he's probably better off with his original format
>> (almost):
>> 
>> cmd = '"$executable" -start "$startTime" -end "$endTime" -dir \
>> "$directory"'
>> os.environ['executable'] = 'blah'
>> os.environ['startTime'] = '12'
>> os.environ['endTime'] = '18'
>> os.environ['directory'] = './'
>> os.system(cmd)
>
> This doesn't resolve the underlying possibility for mailicious people in
> control of the contents of those variables to get it to execute
> arbitrary shell code.  (In his case he says it isn't an issue, but
> still.)

Do you mean something like
os.environ['startTime'] = '`rm -rf /`'
?
That 'rm -rf /' *won't* be executed: the shell will expand
"$startTime" to "`rm -rf /`", and that's it. Of course, if the
executable you're calling is a shell script that doesn't handle it's
arguments correctly, then you're in trouble. That means $executable is
bad practice -- you're allowing arbitrary commands to be called.

-- 
|>|\/|<
/--------------------------------------------------------------------------\
|David M. Cooke
|cookedm(at)physics(dot)mcmaster(dot)ca


From serve at detongiser.com  Wed Jan 14 15:58:18 2004
From: serve at detongiser.com (Servé Lau)
Date: Wed, 14 Jan 2004 21:58:18 +0100
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
	<K_YMb.10994$9k7.204413@news.xtra.co.nz>
	<bu1qq3$cu440$1@ID-207230.news.uni-berlin.de>
	<n22Nb.11299$9k7.210522@news.xtra.co.nz>
	<bu2pgs$d123a$1@ID-207230.news.uni-berlin.de>
	<4004EC9E.1E2E2893@alcyone.com>
	<23891c90.0401140223.344b22af@posting.google.com>
Message-ID: <100bbb6kj9m03a4@corp.supernews.com>

"Paul Boddie" <paul at boddie.net> wrote in message
news:23891c90.0401140223.344b22af at posting.google.com...
> Erik Max Francis <max at alcyone.com> wrote in message
news:<4004EC9E.1E2E2893 at alcyone.com>...
> >
> > There are plenty of things you can get out of starting, getting involved
> > with, and approaching open source projects.  A legion of personal
> > servants is not going to be one of them, and only a crass idiot would
> > think otherwise.
>
> As far as I've been able to discover, life is just one long cocktail
> party in Brandon's honour. So it isn't exactly surprising that
> everyone appears to him as just another waiter with a tray of drinks.

Well said, that's just how he sounds.
I think I'm gonna create a new sig

"I won't stop denigrating OS people for being incapable of fulfillng the
kinds of projects I have in mind
Brandon J. Van Every"




From sdeibel at wingide.com  Tue Jan 13 16:49:50 2004
From: sdeibel at wingide.com (Stephan Deibel)
Date: Tue, 13 Jan 2004 16:49:50 -0500 (EST)
Subject: Support for docutils/ReST sprint at PyCon?
Message-ID: <Pine.LNX.4.50.0401131633050.9121-100000@hedgehog>

Hi,

This is probably only of interest to docutils/ReST users:

I'm trying to help get David Goodger, author of docutils, to PyCon 2004 so
he can lead a docutils/ReST sprint there.  Since he's currently looking
for work (*) and can't make it w/o support, I've taken it upon myself to
try to get enough pledges of $ from interested people to make this
possible.

(*) http://starship.python.net/~goodger/cv/resume_David_Goodger.html).

If you would like to make a donation pledge, please email me with the
amount you'ld be willing to give, and whether or not you want to remain
anonymous.  If there are enough donations in all, we'll figure out ways to
get the money to David.  If we end up falling short, then nobody has to
pay.

The total needed is $500 (US) w/o lodging, more if no free overnight
option is found.  I've currently got $287 in pledges, so hope I might 
find a few more donations here on the general Python list.

More information on the conference is here:

http://pycon.org/dc2004/

Note that the sprints are March 20-23, before the main conference dates
of March 24-26.

Thanks very much!

Stephan Deibel

--
Wing IDE for Python
Archaeopteryx Software, Inc
Take Flight!

www.wingide.com





From a_kabaila at yahoo.com.au  Sat Jan  3 04:19:05 2004
From: a_kabaila at yahoo.com.au (Al Kabaila)
Date: Sat, 03 Jan 2004 20:19:05 +1100
Subject: Starting a script interactively?
References: <37d5fe8f.0401021305.349a440@posting.google.com>
Message-ID: <bt61ct$3l9db$1@ID-216608.news.uni-berlin.de>

David Klaffenbach wrote:

> Is there a way from within a python script to cause the interpreter to
> be in interactive mode after the script finishes?
> 
> so that if I run:
> 
> myscript.py
> 
> it will always execute as if I had run:
> 
> python23.exe -i myscript.py
> 

In Linux OS, add first line in myscript.py as follows:

#! /<path to the directory where python lives>/python

and make sure that myscript.py is executable.  I don't know if this works
under dos, but there should be some equivalent.

Regards,
-- 
Al Kabaila, a_kabaila at yahoo.com.au


From gsmith at oxfam.org.uk  Thu Jan 29 04:28:02 2004
From: gsmith at oxfam.org.uk (Graham)
Date: Thu, 29 Jan 2004 09:28:02 -0000
Subject: Distributing Python programs
References: <4017abb7$0$9394$ed9e5944@reading.news.pipex.net>
	<4017C6EE.E7F1B27@engcorp.com>
	<4017cd62$0$9388$ed9e5944@reading.news.pipex.net>
	<40180790.FED25AB8@engcorp.com>
Message-ID: <4018d298$0$9387$ed9e5944@reading.news.pipex.net>

Thank you to Peter, Skip and Premshree for your help.  I got my network
install of Python up and running and all is well !!!

regards
Graham Smith

PeopleSoft Technical Team Leader
OXFAM GB
+44 (1865) 313255
gsmith at oxfam.org.uk




From yaipa at yahoo.com  Tue Jan  6 22:50:23 2004
From: yaipa at yahoo.com (yaipa h.)
Date: 6 Jan 2004 19:50:23 -0800
Subject: ASCII characters in my hex output
References: <mailman.115.1073335765.12720.python-list@python.org>
Message-ID: <6e07b825.0401061950.680bc643@posting.google.com>

Kelia,

Google,
  " binascii.hexlify " 

at 

  http://groups.google.com/groups?hl=en&lr=&ie=UTF-8&group=comp.lang.python


If your converting a Basic program, I did the same and you can
find it by googling 'Eurotherm'.

  --yaipa

"nuvodido" <kelianichols at ssdd.nrl.navy.mil> wrote in message news:<mailman.115.1073335765.12720.python-list at python.org>...
> I am using pyserial to work with a device on my serial port.  the 
> output is a mixture of ASCII and hex: 
> 
> Ex.	'\x10\x00*'
> 
> 
> I need conver the \x00* nuber in to decimal.  Is there way to 
> convter this value striat forward?
> 
> 
> Thanks in advance
> Kelia Nichols
> ______________________________________
> No trees were killed in the sending of this message. However a large 
> number of electrons were terribly inconvenienced.


From amy-g-art at cox.net  Fri Jan 23 17:02:27 2004
From: amy-g-art at cox.net (Amy G)
Date: Fri, 23 Jan 2004 14:02:27 -0800
Subject: Various strings to dates.
References: <4GfQb.16187$AA6.14368@fed1read03>
	<MFgQb.95539$6y6.1915432@bgtnsc05-news.ops.worldnet.att.net>
Message-ID: <PRgQb.16209$AA6.9881@fed1read03>

No it won't.  Unfortunatly I don't necessarily have a comma delimited date
string.  Thanks for the input though.

The following three date strings is another example of the various date
formats I will encounter here.

Thursday, 22 January 2004 03:15:06
Thursday, January 22, 2004, 03:15:06
2004, Thursday, 22 January 03:15:06

All of these are essentially the same date... just in various formats.  I
would like to parse through them and get a comparable format so that I can
display them in chronological order.


"wes weston" <wweston at att.net> wrote in message
news:MFgQb.95539$6y6.1915432 at bgtnsc05-news.ops.worldnet.att.net...
> Amy,
>     I hope there is a better way but, if you go here:
>
> http://www.python.org/doc/current/lib/datetime-date.html
>
> The new datetime module may help. This and the time mod
> should get you where you want to go.
>
> list     = strdate.split(", ")
> daystr   = list[0]
> daynum   = int(list[1])
> monthstr = list[2]
> year     = int(list[3])
> #funct to get a month int is needed
>
> d = datetime.Date(y,m,d)
>
> wes
>
> ---------------------------------------
>
> Amy G wrote:
> > I have seen something about this beofore on this forum, but my google
search
> > didn't come up with the answer I am looking for.
> >
> > I have a list of tuples.  Each tuple is in the following format:
> >
> > ("data", "moredata", "evenmoredata", "date string")
> >
> > The date string is my concern.  This is the date stamp from an email.
> > The problem is that I have a whole bunch of variations when it comes to
the
> > format that the date string is in.  For example I could have the
following
> > two tuples:
> >
> > ("data", "moredata", "evenmoredata", "Fri, 23 Jan 2004 00:06:15")
> > ("data", "moredata", "evenmoredata", "Thursday, 22 January 2004
03:15:06")
> >
> > I know there is some way to use the date string from each of these to
get a
> > date usable by python, but I cannot figure it out.
> > I was trying to use time.strptime but have been unsuccesful thus far.
> >
> > Any help is appreciated.
> >
> >
>




From erwin+usenet at andreasen.org  Tue Jan 13 08:12:39 2004
From: erwin+usenet at andreasen.org (Erwin S. Andreasen)
Date: Tue, 13 Jan 2004 14:12:39 +0100
Subject: error with /usr/lib/python2.3/compileall.py: "Sorry invalid
 mode: U"
References: <btmr0n$8b7tv$1@ID-165840.news.uni-berlin.de>
Message-ID: <877jzwouuw.fsf@andreasen.org>

Marco Herrn <herrn at gmx.net> writes:

> I tried to install a package under debian, where in the postinstall
> phase some python scripts are called. Then I got the error
> "Sorry invalid mode: U".

> I looked what this script does and it is the following:
>
> 	python -O /usr/lib/python2.3/compileall.py /usr/share/woody

I think this happens because your "python" is really a link to a
pre-2.3 python. The 'U' option to open appeared in 2.3.


-- 
===============================================================
<erwin at andreasen.org>                           Herlev, Denmark     
<URL:http://www.andreasen.org/>                             <*>   
===============================================================



From yet-another at no-domain.cn  Fri Jan  2 02:33:47 2004
From: yet-another at no-domain.cn (Jules Dubois)
Date: Fri, 2 Jan 2004 00:33:47 -0700
Subject: Where to go from here? newbee
References: <bt0asa02hj8@enews1.newsguy.com>
	<1koon5kaqkghf.211m8yj2j32t$.dlg@40tude.net>
	<bt1fe3030pf@enews1.newsguy.com>
Message-ID: <1qjsrabfr90m7.1rrmuiqe42xpb.dlg@40tude.net>

On Thu, 1 Jan 2004 09:45:00 -0600, in article
<news:bt1fe3030pf at enews1.newsguy.com>, Richard wrote:

>  Jules Dubois wrote:
> 
>  > Go to http://www.cs.unm.edu/~ej and click on these links.
> 
>  >   Python Hacking I (Just do it!)
>  >   Python Hacking II (types, functions, exceptions)
>  >   Python Hacking III
> 
>  > Type the commands and see what happens.
> 
> Ok. Now I'm slowly understanding.

In an earlier article, you said "It's like teaching 1st grade stuff to a
college grad."  These files were created by a university senior and were
intended as quick-and-dirty "tutorials", introducing Python to a
senior-level engineering class.  All were new to Python.

What I liked about the tutorials was they were instructive but required the
user to determine the correspondence between the input and output.  If you
or anyone else wants the tutorials, download them now before the account is
removed.  I believe the author graduated in December.

> I guess you could say that python is
> similar to visual basic and c++ in coding.

It's not much like Visual Basic and is perhaps somewhat similar to C++.  As
I learn Smalltalk, what I'm noticing more and more is how similar they are
-- less Smalltalk's integrated environment.

Further, if you're an experienced programmer, I recommend _Python in a
Nutshell_ by Alex Martelli.  I've read it cover to cover about a dozen
times now and my conclusion is that it's one of the very best programming
language books I've read (and I've read many in the last 25 years.)

Finally, download the Python documentation from Python.org.

> I have a program written in python which has several "py" files included.
> How do I view these for the coding examples?

.py files are source code, so load them into your favorite text editor.  I
use XEmacs.


From na  Fri Jan  9 15:10:28 2004
From: na (Andrew)
Date: Fri, 9 Jan 2004 12:10:28 -0800
Subject: How to insert into listbox using wxPython
References: <vvr25kjnd5n397@corp.supernews.com>
	<3ffda907$0$572$b45e6eb0@senator-bedfellow.mit.edu>
Message-ID: <vvrec7d5bs4ve6@corp.supernews.com>

Hi thanks for your help but I am still having problems basically I am using
a button to connect to a Database and I want to display the data from the
database into the listbox
Here is the code I am using for the button

    def OnB2Button(self, event):
        self.db = MySQLdb.connect("localhost", "", "", "guestbook")
        global db
        self.c = self.db.cursor()
        self.c.execute("SELECT * FROM guests;")
        self.results = self.c.fetchall()
        # Here is where I don't know what to do I want to be able to get the
data from self.results and display it in the listbox
        self.listbox.Append('')
        self.listbox.Set([''])
        self.listbox.Delete(0)
        print self.listbox.GetSelections()
        self.sizer.Add(self.listbox, 0, wxEXPAND)
        self.Set.Sizer(self.sizer)

Thank you again for your help

Cheers

Andrew




From swalters_usenet at yahoo.com  Sun Jan 11 02:47:26 2004
From: swalters_usenet at yahoo.com (Samuel Walters)
Date: Sun, 11 Jan 2004 07:47:26 GMT
Subject: readling newlines
References: <IXTLb.87546$_P.3280883@news4.tin.it>
Message-ID: <pan.2004.01.11.07.46.06.218273@yahoo.com>

|Thus Spake Alessandro Crugnola *sephiroth* On the now historical date of
Sat, 10 Jan 2004 14:25:44 +0000|

> Hi, I'm trying to detect the newlines method of a file opened. I'm using
> the 'U' mode as parameter when opening a file, but for every file opened
> the result is always "\r\n", even if the file has been saved with the
> "\n" newline method. Is there i'm missing?
> 
> I'm on Windows with python 2.3.3

Not quite sure what "U" mode is, but try adding the "b" mode when opening
the file.  Windows makes a distinction between binary and text files. 
Python defaults to text mode, and since newlines for windows text is \r\n,
that's what Python puts there.

HTH

Sam Walters.

-- 
Never forget the halloween documents.
http://www.opensource.org/halloween/
""" Where will Microsoft try to drag you today?
    Do you really want to go there?"""



From pinard at iro.umontreal.ca  Tue Jan 20 19:18:15 2004
From: pinard at iro.umontreal.ca (=?iso-8859-1?Q?Fran=E7ois?= Pinard)
Date: Tue, 20 Jan 2004 19:18:15 -0500
Subject: calling Pyrex results from C
In-Reply-To: <20040120234855.GV22782@jowls>
References: <f7tvd1-a1o.ln1@jowls.lairds.org>
	<20040120172733.GA7666@titan.progiciels-bpi.ca>
	<20040120234855.GV22782@jowls>
Message-ID: <20040121001815.GA22127@alcyon.progiciels-bpi.ca>

[Kyler Laird]
> On Tue, Jan 20, 2004 at 12:27:33PM -0500, Fran?ois Pinard wrote:

> > There is some magic needed to establish Python context, not much.
> > Hoping that it will help, here is a template I use when generating
> > Pyrex main programs.

> Paul started me on this path and you've given me exactly what I need to
> keep going.

Good. :-)

There is also some linking magic, which differs from system to system,
it might be documented in the Python Embedding API, I'm not sure.  If
you do not stumble on the proper recipe, I'll share what I use on Linux.
Just ask if you want me to go search into some of my Makefiles :-).

-- 
Fran?ois Pinard   http://www.iro.umontreal.ca/~pinard



From ramen at lackingtalent.com  Thu Jan 22 02:12:02 2004
From: ramen at lackingtalent.com (Dave Benjamin)
Date: Thu, 22 Jan 2004 07:12:02 -0000
Subject: Do (USA) Python conferences require a coast?
References: <6b50e1-goo.ln1@jowls.lairds.org> <bun5r1$db1$1@panix1.panix.com>
Message-ID: <slrnc0uues.pop.ramen@lackingtalent.com>

In article <bun5r1$db1$1 at panix1.panix.com>, Aahz wrote:
> In article <6b50e1-goo.ln1 at jowls.lairds.org>,
> Kyler Laird  <Kyler at news.Lairds.org> wrote:
>>
>>It looks like PyCon
>>	http://pycon.org/
>>is always in Washington, DC.  I try to avoid DC.
> 
> It's kind of hard to say "always" about a conference that hasn't had its
> second iteration yet.  ;-)

Well, it does make it particularly hard to find a counterexample. ;)

How about Phoenix, Arizona? The only time we have a coast is if there's
enough money in it for lakefront real estate.

Effortlessly avoiding DC,
Dave

-- 
.:[ dave benjamin (rameny sp00) -:- spoomusic.com -:- ramenfest.com ]:.
: d r i n k i n g   l i f e   o u t   o f   t h e   c o n t a i n e r :


From xpythonist at yahoo.com.br  Tue Jan 20 06:27:00 2004
From: xpythonist at yahoo.com.br (=?iso-8859-1?q?Aloysio=20Figueiredo?=)
Date: Tue, 20 Jan 2004 08:27:00 -0300 (ART)
Subject: Escaping slashes (double backslash plague)
In-Reply-To: <20040119202933.GA10765@nl.linux.org>
Message-ID: <20040120112700.98379.qmail@web21508.mail.yahoo.com>

 --- Peter Hansen <peter at engcorp.com> escreveu: 

> If this isn't what you're trying to do, please
> explain more thoroughly
> what your goal is, because it seems very unnecessary
> to be putting 
> \/ into a string for any reason (whether as a path
> or not) ...
> 
> -Peter

Yes, that is what I was trying to do, and five minutes
after posting I realized that it was a very stupid
idea. I apologize for bothering you and the others
asking things I should have figured out myself. But
thanks anyway, because your explanation helped me to
clarify some misconceptions I had about strings in
python!

Aloysio

______________________________________________________________________

Yahoo! GeoCities: a maneira mais f?cil de criar seu web site gr?tis!
http://br.geocities.yahoo.com/



From swalters_usenet at yahoo.com  Sun Jan 18 22:44:49 2004
From: swalters_usenet at yahoo.com (Samuel Walters)
Date: Mon, 19 Jan 2004 03:44:49 GMT
Subject: re question - finiding matching ()
References: <4f0a9fdb.0401180751.4b66d974@posting.google.com>
	<7xr7xwyhws.fsf@ruckus.brouhaha.com>
Message-ID: <pan.2004.01.19.03.43.16.431869@yahoo.com>

| Paul Rubin said |

> miki.tebeka at zoran.com (Miki Tebeka) writes:
>> I'd like to find all of the sub strings in the form "add(.*)"
>> The catch is that I might have () in the string (e.g. "add((2 * 2), 100)"), 
> 
> You can't do that with classic regexps.  You need a parser, not a scanner.

Or, to put it slightly differently:

Regexps are a type of system that is not mathematically powerful enough to
handle this type of identification.  The next step up in power are
parsers.

Sam Walters.

-- 
Never forget the halloween documents.
http://www.opensource.org/halloween/
""" Where will Microsoft try to drag you today?
    Do you really want to go there?"""



From jsbenson at bensonsystems.com  Thu Jan 15 14:01:19 2004
From: jsbenson at bensonsystems.com (John Benson)
Date: Thu, 15 Jan 2004 11:01:19 -0800
Subject: the thread that refused to die: I come not to bury C++,
	but to praise it...
Message-ID: <0bf101c3db99$f64fa5c0$8d09500a@jsbwxp3>

Regarding the post below, I'm not against anything that helps you get work
done. There are just a lot of tradeoffs, and the rather spirited discussion
of C++ over the last few days has highlighted a lot of them. My spiritual
master Dogbert once said, "Assume that everybody has had the same
experiences as you; then, if they disagree, they must be stupid." In my
experience, C++ was only a short detour between C and Python due to the
vagaries of my job history. It's dawning on me, however, that not everyone
had the same experiences, that there is a lot of valuable C++ expertise out
there, and that C++ may well be around for longer than I initially thought.

My initial purpose in this thread was to try to help people "let go" of C++,
static typing (and maybe even Java!) by putting some historical perspective
on it. I suppose the exercise was hypocritical, because I'm still holding
onto my Commodore 64, Kaypro PC, and, of course, the C language. Go figure.
I am happy, however, that the thread dislodged some interesting comments
from the convolutions of various contributors.

Message: 4
Date: Thu, 15 Jan 2004 03:03:53 GMT
From: "python newbie" <mesteve_b at hotmail.com>
Subject: Re: I come not to bury C++, but to praise it...
To: python-list at python.org
Message-ID: <tqnNb.10910$ry6.2729 at newssvr25.news.prodigy.com>

Are you against using C++ wrapped in a library such as wxWindows?  This
library makes it pretty easy painless to write cross-platform stuff, but
even on Windows alone, it beats MFC or the going price of Delphi.







From swalters_usenet at yahoo.com  Thu Jan 15 00:30:12 2004
From: swalters_usenet at yahoo.com (Samuel Walters)
Date: Thu, 15 Jan 2004 05:30:12 GMT
Subject: Printing to console (No Scroll)
References: <mailman.365.1074103229.12720.python-list@python.org>
Message-ID: <pan.2004.01.15.05.28.44.882867@yahoo.com>

The cheesy dirt simple way:

 print "Closing window in :"
 for second in range(10):
     time.sleep(1)
     #print enough spaces to cover up the last message.
     print " "*20 + "\r",
     print `10-second` +" seconds",

Note the comma at the end of each print statement.
That causes python not to output a newline.

HTH

Sam Walters.

-- 
Never forget the halloween documents.
http://www.opensource.org/halloween/
""" Where will Microsoft try to drag you today?
    Do you really want to go there?"""



From llothar at web.de  Sat Jan 31 23:51:53 2004
From: llothar at web.de (Lothar Scholz)
Date: 31 Jan 2004 20:51:53 -0800
Subject: OT: why do web BBS's and blogs get so slow?
References: <7xbrojk9rk.fsf_-_@ruckus.brouhaha.com>
Message-ID: <6ee58e07.0401312051.5688006c@posting.google.com>

Paul Rubin <http://phr.cx at NOSPAM.invalid> wrote in message news:<7xbrojk9rk.fsf_-_ at ruckus.brouhaha.com>...
> Lots of times, when a blog (that supports user comments) or a web BBS
> gets heavily loaded, it slows down horribly, even when it's hosted at
> an ISP on a fast computer with plenty of net bandwidth.  I'm wondering
> what those programs are doing, that makes them bog down so badly.
> Anyone know what the main bottlenecks are?  I'm just imagining them
> doing a bunch of really dumb things.

The problem is that most of them don't use an application server and
that most of them uses databases very unoptimized, for example PhpBB
runs about 50 SQL queries per page for medium size thread views.

The www.asp-shareware.org has a nice framework that let you view the
messages in an nntp server. It's amazing fast, because everything is
hold in memory. Optimizing this by a factor 10 is not difficult.

The problem may come with slashdot or for example the german website
"www.heise.de" which gets upto 100 requests per second (it's among the
top ten in germany). They also use a NNTP backend. For sites like this
you need multiple server and then its not so easy to maintain cache
coherence. But there are only very few websites that have this
traffic.

At the moment there seems to be absolute no evolution in the area of
BBS's. PHPBB has set a standart an it seems that nobody is able to
think about more/other functionality. Maybe if more and more people
get virtual servers and have more control over what they can install
then it may become better. We shall see.


From edcjones at erols.com  Sun Jan 25 22:33:41 2004
From: edcjones at erols.com (Edward C. Jones)
Date: Sun, 25 Jan 2004 22:33:41 -0500
Subject: efficient updating of nested dictionaries
In-Reply-To: <H%_Qb.2609$925.1917@nwrddc02.gnilink.net>
References: <H%_Qb.2609$925.1917@nwrddc02.gnilink.net>
Message-ID: <40148b8d$0$7336$61fed72c@news.rcn.com>

omission9 wrote:
> I have a dictionary that looks like this
> MY_DICT[KEY_X][KEY_Y][KEY_Z]=FOO
> 
> I am having a problem updating this with a simple 
> MY_DICT.update(NEW_DICT) as update doesn't seem to care about getting 
> into the inner dicts.
> Getting the keys of each and iterating through and updating each one is 
> terribly slow as the number of keys gets bigger and bigger.
> What is the bst way to update my nested dicts?

Make a table whose rows are (KEY_X, KEY_Y, KEY_Z, FOO). If the table is 
large use MySQL or some other database. For small or medium sized tables 
try "http://members.tripod.com/~edcjones/MultiDict.py".


From peter at engcorp.com  Tue Jan 13 14:21:16 2004
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 13 Jan 2004 14:21:16 -0500
Subject: Division oddity
References: <ssn3009029rrug3l8dk1pn06tqd019ucld@4ax.com>
	<7xeku5vrn8.fsf@ruckus.brouhaha.com>
	<cdm7005r12o3o3f6gngj8no1qh74ul3733@4ax.com>
	<400413E0.5C691A56@engcorp.com>
	<m3hdyzyg96.fsf@pc150.maths.bris.ac.uk>
Message-ID: <4004452C.47DB4C4@engcorp.com>

Michael Hudson wrote:
> 
> Peter Hansen <peter at engcorp.com> writes:
> 
> > Tim Rowe wrote:
> > >
> > > Well, the documentation for "input()" says "Equivalent to
> > > eval(raw_input(/prompt/))". Perhaps it should say "/Usually/
> > > equivalent...."
> >
> > I remember reading that too, and just assumed that at this point
> > it was in fact *implemented* that way, as a simple alias.  Maybe
> > it should be...
> 
> http://www.python.org/sf/876178
> 
> Ideas on how to write a testcase welcome.

Are there any test cases which verify behaviour both in the presence
and absence of certain "from __future__ import" statements?

My first thought would have been simply to write two test files,
one of which imports from __future__ and the other which does not,
and check that in both cases input(x) == eval(raw_input(x)).  

Or is the issue how to test when the input comes from stdin?  In
that case, doesn't faking sys.stdin work as usual?

-Peter


From skip at pobox.com  Wed Jan 28 11:07:21 2004
From: skip at pobox.com (Skip Montanaro)
Date: Wed, 28 Jan 2004 10:07:21 -0600
Subject: isinstance() bug
In-Reply-To: <20040128154119.GA11485@foof.i3.cz>
References: <20040128132225.GA10842@foof.i3.cz>
	<16407.54576.283608.505067@montanaro.dyndns.org>
	<20040128154119.GA11485@foof.i3.cz>
Message-ID: <16407.56889.446921.416710@montanaro.dyndns.org>


    >> You imported the module twice (look at sys.modules) so you have two
    >> different A classes.

    Michal>  i think that if absolute path was somehow put into the classes
    Michal>  internal information this inconsistency would be put away.

Perhaps.  Try it and see.  Patches are welcome... ;-)
 
    Michal>  and as to the sys.modules thing: this could be considered as
    Michal>  just two references to the same module (again its absolute path
    Michal>  would be taken into account), not two different modules.

    Michal>  does it make sense?

Yup.  Patches are welcome. <wink>

Skip



From bkelley at wi.mit.edu  Thu Jan 29 16:57:00 2004
From: bkelley at wi.mit.edu (Brian Kelley)
Date: Thu, 29 Jan 2004 16:57:00 -0500
Subject: Python vs. Io
In-Reply-To: <101iv0ri062ag22@news.supernews.com>
References: <711c7390.0401291301.3f95794@posting.google.com>
	<101iv0ri062ag22@news.supernews.com>
Message-ID: <4019813c$0$559$b45e6eb0@senator-bedfellow.mit.edu>

John Roth wrote:
> "Daniel Ehrenberg" <LittleDanEhren at yahoo.com> wrote in message
> news:711c7390.0401291301.3f95794 at posting.google.com...
> 
> 
>>Can anyone show me how to so much as alias "for" to "each" in Python
> 
> 
> Without getting into the language wars, I think what you're looking
> for is called the Visitor Pattern (Design Patterns: GOF). It's actually
> trivial to implement as long as you're not looking for built-in support.

I think Daniel's example is a little bit more complicated than that.  It 
resembles more closly the lisp-ish macros that were discussed to death a 
while ago.

Note that in his code:
each((key, value) in map(x=1, y=2, z=3),
     write(key, ": ", value, "\n")
)

key and value are variable names that get used inside the function call.

Here is my pythonic(?) version, however it requries a lambda to bind the 
variable names.

def map(**kw):
     return kw.items()

def each(seq, func):
     for v in seq:
         apply(func, v)

from sys import stdout
write = stdout.write

each(map(x=1,y=2,z=3),
      lambda key, value: write("%s: %s\n"%(key, value)))

Brian



From wfolta at netmail.to  Sun Jan 18 22:47:26 2004
From: wfolta at netmail.to (Wayne Folta)
Date: Sun, 18 Jan 2004 22:47:26 -0500
Subject: New to Python: my impression v. Perl/Ruby
Message-ID: <3296C411-4A32-11D8-9496-000A959CB2EC@netmail.to>

I've been a long-time Perl programmer, though I've not used a boatload 
of packages nor much of the tacky OO.

A couple of years ago, I decided to look into Python and Ruby. Python 
looked OK, but not that different. I did like the indent-as-group idea, 
which was different. Ruby looked very cool. But it was impossible to 
get good documentation. It seemed like a Japanese cult with a few 
western initiates.

Well, MacOS X ships with Perl, Python, and Ruby (and PHP, and ...) so I 
recently figured I'd try them again. I still find Ruby more intriguing, 
but I've settled on Python. Why?

Well, Perl is an expedient measure that (for me) doesn't scale up and 
has that horrible OO syntax. (So I never used it much.) If you're going 
to read someone else's Perl, you had better be "in the zone".

A couple of months ago, I'd written a quick Perl script that would 
"unstick" a co-worker's POP email. The problem is the Windows-based POP 
server is too stupid to realize a message does not end in CRLF, so it 
just appends a period then CRLF thinking it's doing well. But the 
period ends up not being alone on a line, so it's not a valid 
termination to the message. So their email program hangs waiting for a 
proper termination. Sigh.

A week ago, the script broke because I hadn't properly accounted for 
the fact that the user might have hundreds of messages queued up. (I 
hadn't used a Perl POP package, which might've handled it, but just 
threw it together myself. Yes, that would've made the Perl code more 
competitive with the other two solutions.)

So I decided this might be a nice exercise to try Python. And it went 
together very quickly using Python's POP3 package. Then I decided to 
try it in Ruby. I think one little portion of the code shows the 
difference between the two cultures.

The problem is that the message is not properly terminated, so you need 
to time out and catch that timeout to realize, "hmmm, malformed". In 
Python I had:

M = poplib.POP3 ('172.16.30.1') ;
M.user ('foo') ;
M.pass_ ('bar')

num_mesgs = len (M.list ()[1])
bad_mesgs = 0

for msg in range (num_mesgs):
	try:
		M.retr (msg + 1)
... blah blah...

How do I get it to time out after 5 seconds and how do I catch that? 
The online docs are pretty good, but I had to guess that POP3 was built 
on the socket package. Looking at socket's docs I found the proper 
command and exception. I had to include:

socket.setdefaulttimeout (5.0)

before the POP3 commands to set the default socket timeout to 5 
seconds. And

except socket.timeout:

is the proper way to catch the timeout. Both of these things are in the 
socket documentation.

Contrast this with Ruby. The Ruby docs are less complete, but they did 
mention that POP was subclassed from protocol and you'd have to look at 
protocol's source to see how it works. Looking through protocol, I 
figured out what to do and it was more elegant.

The protocol class had a read_timeout, but since Ruby's mantra might be 
said to be "Real OO", the POP code had been written such that you could 
say

pop.read_timeout = 5

after the POP open and it set the timeout for that pop connection to 5 
seconds. Almost as if POP passed the read_timeout upstream to socket 
automatically. (I don't think Ruby does, but it's coded to look that 
way.)

My experience is limited, but it feels like this example gives a good 
feel for the two languages. Python was better documented and things 
came together quickly. Ruby ultimately had a more elegant solution, but 
was more poorly documented. This echoes the mantras: Python's is 
"Batteries Included", while Ruby's might be "Real OO".

On a personal note, I usually prefer an elegant solution, but when the 
language goes so far as to consider

0.step(360, 45)

to be reasonable, my head hurts. I know there's syntactic sugar so I 
don't have to code like that. I know everything's an object. But, 
dammit, a constant integer is an integer with constant value and 
causing it to iterate is a step too far.
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From asterix5 at tiscali.fr  Mon Jan 26 04:16:23 2004
From: asterix5 at tiscali.fr (asterix5 at tiscali.fr)
Date: Mon, 26 Jan 2004 09:16:23 GMT
Subject: any news client in Python?
Message-ID: <4014db58$0$7162$626a54ce@news.free.fr>


Had you tried Naja? It's a newsreader with a csv filter.

http://www.keyphrene.com/products/naja


From carroll at tjc.com  Sat Jan 24 22:17:06 2004
From: carroll at tjc.com (Terry Carroll)
Date: Sun, 25 Jan 2004 03:17:06 GMT
Subject: Newbie Nested Function Problem
References: <O4GQb.12838$Tk3.10642@twister.nyroc.rr.com>
Message-ID: <52d610h685a613ua1tk5k8f11cv1d61q0b@4ax.com>

On Sun, 25 Jan 2004 02:45:02 GMT, "Brian Samek"
<zensunni at rochester.rr.com> wrote:

>I began learning python a few days ago and just wrote the following program.
>I have nested three functions together.  For some reason, the leave function
>works fine when 'y' or 'n' are inputted, but it does not restart itself when
>other things are inputted.  Why is this?

I haven't tried running this, but...

># This program counts down from a user-defined integer less than or equal
># to 500.
>
>print "This program counts down from any number less than or equal to 500"
>print
>
># ask_number gets the number from the user and then puts it into countdown
>
>def ask_number():
>    number = input("Please enter a number.\n")
>    if number > 500 or number - int(number) != 0 or number < 1:
>        print "Input positive integers less then 501 only, please."

Okay, ask_number doesn't do what you're saying.  It's asking for a number,
placed into variable number, and if it gets something out of range, prints
an error message.

And then ends.  It doesn't either a) repeat until it gets a valid number
or b) do anything with the number it gets, like pass it back to the caller
in a return statement, i.e.:

  return number

> ask_number()

Okay, you invoked ask_number, but didn't even try to get anything from it.
Normally, this would read something like:

number_in = asknumber()

>    else:

Um.. it looks like you're inadvertably making this a deeply recursive
call, probably something you want to stay away from until you have regular
stuff down pat.




From eurleif at ecritters.biz  Thu Jan 22 16:21:00 2004
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Thu, 22 Jan 2004 21:21:00 GMT
Subject: Ordered dictionary?
In-Reply-To: <bupbro$r38$1@news.service.uci.edu>
References: <leWPb.231$af7.162835@newshog.newsread.com>
	<bupbro$r38$1@news.service.uci.edu>
Message-ID: <09XPb.234$af7.167008@newshog.newsread.com>

Josiah Carlson wrote:
>> I need to associate a string (key) with an integer (value). A 
>> dictionary would do the job, except for the fact that it must be 
>> ordered. I also need to look up the value for a specific key easily, 
>> so a list of tuples wouldn't work.
> 
> 
> How must the dictionary be ordered?  Do you need the keys or the values 
> sorted?

Sorry for not making that clear, I need it sorted by the order of 
insertion. Looks like 
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/107747 might do 
what I want...



From http  Wed Jan 28 00:04:42 2004
From: http (Paul Rubin)
Date: 27 Jan 2004 21:04:42 -0800
Subject: little client + server app : has this been done?
References: <mailman.888.1075263598.12720.python-list@python.org>
Message-ID: <7x1xpkk6j9.fsf@ruckus.brouhaha.com>

Python Baby <python at hitmedia.com> writes:
> Should I do it from scratch or is this just some well-known library I
> don't know about?   (I searched around, of course, but couldn't find one.)
> 
> Thanks!

Use a web server.


From OlafMeding at compuserve.com  Thu Jan  8 14:03:10 2004
From: OlafMeding at compuserve.com (Olaf Meding)
Date: 8 Jan 2004 11:03:10 -0800
Subject: Name of the function
References: <9e5ea2c4.0401080640.64ef5d58@posting.google.com>
	<btjuct$84v33$1@ID-217427.news.uni-berlin.de>
Message-ID: <9e5ea2c4.0401081103.6fa93bf9@posting.google.com>

Is there a way to do this w/o importing another module?

Yes this is what I was looking for except the code below requires
importing module inspect.

> def foo():
>      print inspect.currentframe().f_code.co_name

Thanks much for your reply.


Olaf


From guettli at thomas-guettler.de  Tue Jan  6 09:18:22 2004
From: guettli at thomas-guettler.de (Thomas Guettler)
Date: Tue, 06 Jan 2004 15:18:22 +0100
Subject: tuple.__hash__()
References: <pan.2004.01.06.08.17.30.910345@thomas-guettler.de>
	<just-443724.09402406012004@news1.news.xs4all.nl>
	<mailman.136.1073379851.12720.python-list@python.org>
Message-ID: <pan.2004.01.06.14.18.21.579721@thomas-guettler.de>

Am Tue, 06 Jan 2004 04:04:01 -0500 schrieb Mike C. Fletcher:

> Just wrote:
> AFAIK, the dictionary class simply uses the hash to sort into buckets, 
> providing fast indexing, before using equality to check whether the two 
> keys are equal. 

Thank you, that what I was asking for.

Here is a sample script which checks this:

from types import *

class MyHash:
    def __init__(self, id):
        assert(type(id)==IntType)
        self.id=id

    def __hash__(self):
        # All objects have the same hash value
        return 1

    def __cmp__(self, b):
        return cmp(self.id, b.id)

    def __repr__(self):
        return "<MyHash id=%s>" % self.id
    
def main():
    d={}
    i1=MyHash(1)
    d[i1]=1
    i2=MyHash(2)
    d[i2]=1
    i3=MyHash(3)
    d[i3]=1
    print d.items()

    # id=1 twice
    d[MyHash(1)]=1

    print d.items()
    # All right there are only three elements in the dict
    # Dictionaries use __cmp__ if __hash__ is equal.
    
if __name__=="__main__":
    main()
    
    	


From bokr at oz.net  Thu Jan  8 13:53:10 2004
From: bokr at oz.net (Bengt Richter)
Date: 8 Jan 2004 18:53:10 GMT
Subject: Integer math question
References: <3987e01c.0401030832.114c6f2a@posting.google.com>
Message-ID: <btk8um$eka$0@216.39.172.122>

On 3 Jan 2004 08:32:07 -0800, mersmann at szut.uni-bremen.de (Frank) wrote:

>Hi,
>
>can anybody help with the following problem?
>
>In C++
>
>i = 5 / 10 	and
>i = -5 / 10 	both have the same result 0.
>
>In python
>
>i = 5 / 10 	gives me 0 as expected, but
>i = -5 / 10 	gives -1 as result.
>
>Is this a feature or a bug? I remember Delphi gave me the same result as
>C++.
It is a feature. Python does the more useful thing IMO.
If you look on / (or now //) as a denominator-defined mapping
of integer intervals to integers, it is clearer.

I.e., the mappings that python implements are

    [denom*k, denom*k+denom) => k for denom >0
and
    [denom*k+denom, denom*k) => k for denom <0


The C version is ugly, because it maps a unique extra-sized interval
around zero to zero, i.e., for denom>0

    [-denom+1, denom) => 0

which contains 2*denom-1 source integers, and all the rest of the
intervals go symmetrically in both directions from there, containing
denom integers. Python's source intervals are all the same size.


====< showintdiv.cpp >=====================================
#include <stdio.h>
#include <stdlib.h>
void main(int argc, char* argv[]){
    if(argc<4){ printf("Usage: %s xlo xhi den\n", argv[0]); return; }
    int xlo = atoi(argv[1]);
    int xhi = atoi(argv[2]);
    int den = atoi(argv[3]);
    int x;
    for(x=xlo; x<xhi; ++x) printf("%3d", x); printf("\n");
    for(x=xlo; x<xhi; ++x) printf("%3d", x/den); printf("\n");
}
===========================================================

We'll do a weird printf JFTHOI and to match program lines better:

====< showintdiv.py >======================================
printf = (lambda wso, fmt, *args: wso(fmt%args)).__get__(
            __import__('sys').stdout.write)

def main(argv):
    if len(argv)<4: printf("Usage: %s xlo xhi den\n" % argv[0]); return
    xlo = int(argv[1])
    xhi = int(argv[2])
    den = int(argv[3])
    for x in xrange(xlo, xhi): printf("%3d", x)
    printf("\n");
    for x in xrange(xlo, xhi): printf("%3d", x/den)
    printf("\n");

if __name__== '__main__':
    import sys
    main(sys.argv)
===========================================================


Python maps successive equal sized intervals to successive integers from -inf to +inf

[10:38] C:\pywk\clp>showintdiv.py   -15 16  5
-15-14-13-12-11-10 -9 -8 -7 -6 -5 -4 -3 -2 -1  0  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15
 -3 -3 -3 -3 -3 -2 -2 -2 -2 -2 -1 -1 -1 -1 -1  0  0  0  0  0  1  1  1  1  1  2  2  2  2  2  3

But C maps symmetrically across zero, causing 2*denom-1 points to map to zero

[10:38] C:\pywk\clp>showintdiv.exe  -15 16  5
-15-14-13-12-11-10 -9 -8 -7 -6 -5 -4 -3 -2 -1  0  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15
 -3 -2 -2 -2 -2 -2 -1 -1 -1 -1 -1  0  0  0  0  0  0  0  0  0  1  1  1  1  1  2  2  2  2  2  3

With a negative denominator, python still maps successive intervals, but going the other
direction from (and including) zero.

[10:38] C:\pywk\clp>showintdiv.py   -15 16 -5
-15-14-13-12-11-10 -9 -8 -7 -6 -5 -4 -3 -2 -1  0  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15
  3  2  2  2  2  2  1  1  1  1  1  0  0  0  0  0 -1 -1 -1 -1 -1 -2 -2 -2 -2 -2 -3 -3 -3 -3 -3

Whereas C is still symmetric with the 2n-1 points going to zero:

[10:38] C:\pywk\clp>showintdiv.exe  -15 16 -5
-15-14-13-12-11-10 -9 -8 -7 -6 -5 -4 -3 -2 -1  0  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15
  3  2  2  2  2  2  1  1  1  1  1  0  0  0  0  0  0  0  0  0 -1 -1 -1 -1 -1 -2 -2 -2 -2 -2 -3

The extra-sized interval across zero makes for a hiccup in the use of the mapping as a function.
E.g., you can't translate the input by k*denom and get a uniformly translated (by k) output
unless you stay away from the zero interval.

Ok, back to the grind...

Regards,
Bengt Richter


From swalters_usenet at yahoo.com  Tue Jan  6 01:20:20 2004
From: swalters_usenet at yahoo.com (Samuel Walters)
Date: Tue, 06 Jan 2004 06:20:20 GMT
Subject: Python/C and PYTHONPATH
References: <btbn3o$5oo$1@ousrvr3.oulu.fi>
	<mailman.98.1073310473.12720.python-list@python.org>
	<btc2ng$alg$1@ousrvr3.oulu.fi>
	<pan.2004.01.05.22.04.32.450627@yahoo.com>
	<btcp2n$jod$1@ousrvr3.oulu.fi>
	<pan.2004.01.06.00.07.02.165377@yahoo.com>
	<btd1iv$mv9$1@ousrvr3.oulu.fi>
Message-ID: <pan.2004.01.06.06.19.09.420665@yahoo.com>

Ack...  definitely not pep-7 compliant code

And to think...  A co-worker once called me "obsessive" about indention.
(They say "obsessive," I say "consistent and legible.")

Well, It seems PAN likes to perform a stealth word-wrap when you edit from
the non-attached editor. (I used vim because I'm comfy hammering out code
there)  Nope, on second look, I must have accidentally mashed some keys
while in vim.  That extraneous "else" block is just a copy of the "else"
block.

If you run it through indent, and clean up a couple of oddball line-wraps
it will at least be legible. Remove the unneeded prototypes, embarrassing
extra else block, and it will compile. Remove the whole block about
searching for the = and fix the typo in the second setenv call (extrapath
should be eventual_path) and it will run without segfault.  Then replace
the ";" with ":" and it will run properly on a linux system.  For myself,
I made the snippet a little more general and added the option of choosing
which pathlist env variable and changed the function name to
envPathAppend. Then it's not a bad little snippet.


|Thus Spake Tero Pihlajakoski On the now historical date of Tue, 06 Jan
2004 01:04:31 +0000|

> Here. I might not want to add ';' or ':', depending on the OS (probably
> not)? I can solve this with #ifdefs for WIN32 and Linux, but everytime I
> want to run it on a new system, I'd have to find out the delimiter... It
> also needs a buffer underrun check on that [1024]. I'll stick with the
> PyRun_... for now, but I'll definitely save this code, so thanks. Again.

That buffer overrun is not the only bit of braindead logic in that
snippet.  The "success/failure" condition testing leaves a couple of loose
ends.

> Also, found this piece from sys.path docs (now that my net is up and
> running):
>   ... "A program is free to modify this (sys.path) list for its own
> purposes." ...

Hmmm...  I suppose it's a matter of aesthetics and scope of the project
you're working on.  If you're writing a big program for which the python
interpretor is only one small or medium part of the functionality and the
majority is c/c++, then you're opening up a whole big realm of
cross-platform issues.  However, if the bulk of your code is python, then
perhaps you should have the main program be in python with your extra c
code as a module. That would be cleaner and probably more portable.

I suspect that at this point you're just trying to tinker with the
interface, then use what's most comfortable.  Now at least, you have an
option.  Besides, it seems that someone already posted a cleaner fix than
I could have given you.

HTH

Sam Walters.

-- 
Never forget the halloween documents.
http://www.opensource.org/halloween/
""" Where will Microsoft try to drag you today?
    Do you really want to go there?"""



From eastier at free.fr  Sat Jan 31 21:21:57 2004
From: eastier at free.fr (Emmanuel)
Date: Sun, 01 Feb 2004 03:21:57 +0100
Subject: How to optimised with embedded Python ?
Message-ID: <401C62C5.C5ECABF7@free.fr>

Hi,

I would like to use optimised python scripts ( *.pyo ), in order to gain
space.
But I use an embedded python. The compiler can only be run from my
application.
How do I set the compiler, from the C api, to create optimised files ?

Thanks by advance,

Emmanuel



From dan.ng at bullok.com  Sat Jan  3 19:59:42 2004
From: dan.ng at bullok.com (Dan Bullok)
Date: Sun, 04 Jan 2004 00:59:42 GMT
Subject: Parametrized inheritance
Message-ID: <2AJJb.725692$HS4.5422608@attbi_s01>

I have a couple of classes:
    class Base:
        ...

    class Sub(Base):
        ...


I want to subclass Base and Sub, i.e. define classes:
    class MyBase(Base):
        ...

    class MySub(Sub):
        ... 

The inheritance looks like this: 
    Base->MyBase
        ->Sub->MySub

But I'd really like it to look like this:
    Base->MyBase->Sub->MySub

i.e. define Sub as "class Sub(X)", where I can change X at the time of
instantiation.  Then I could define MySub as "class MySub(Sub(MyBase))".
(I hope that it's obvious that I'm looking for this effect, not this syntax)


Of course, someone is going to ask "why?"

I need to override a few members in Base.  Sub is mostly fine as-is, so if I
could have MySub=Sub(MyMBase), that would be fine.



    

                


From martin at v.loewis.de  Sat Jan 24 03:26:40 2004
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 24 Jan 2004 09:26:40 +0100
Subject: utf8 encoding problem
In-Reply-To: <mailman.643.1074780990.12720.python-list@python.org>
References: <20040122103549.GA5620@wiggy.net>	<Pine.LNX.4.44L.0401221640010.31484-100000@ods.pravda.rfn.ru>
	<mailman.643.1074780990.12720.python-list@python.org>
Message-ID: <buta7q$vtv$06$1@news.t-online.com>

Wichert Akkerman wrote:


>>P.S. According to HTML standard, with
>>application/x-www-form-urlencoded content type form data are
>>resricted to ASCII codes:
[...]
> Luckily that is not true, otherwise it would be completely impossible to
> have websites using non-ascii input. To be specific, the encoding used
> for HTML forms is determined by:  [algorithm omitted]

As Denis explains, it is true. See 17.13.4

application/x-www-form-urlencoded
... Non-alphanumeric characters are replaced by `%HH', a percent sign 
and two hexadecimal digits representing the ASCII code of the character.

So this form is restricted only to characters which have an ASCII code,
i.e. ASCII characters.

To have non-ASCII input, use multipart/form-data:

multipart/form-data
...
The content type "multipart/form-data" should be used for submitting 
forms that contain files, non-ASCII data, and binary data.

This reconfirms that you should use it for non-ASCII.

Regards,
Martin



From baas at ira.uka.de  Sun Jan 18 13:49:55 2004
From: baas at ira.uka.de (Matthias Baas)
Date: Sun, 18 Jan 2004 19:49:55 +0100
Subject: ANN: Python Computer Graphics Kit v1.1.0
Message-ID: <l3ll00hh5sffii6d19qo6taomml102o1a9@4ax.com>

Release 1.1.0 of the Python Computer Graphics Kit is available at
http://cgkit.sourceforge.net

What is it?
-----------

The kit is a collection of Python modules that contain the basic types
and functions required for creating 3D computer graphics images. The
kit includes several new types such as vectors, matrices and
quaternions. It contains a binding for Pixar's RenderMan interface
which is a renderer independent API to communicate 3D data to
renderers which will finally produce a 2D image. There are already
several RenderMan compliant renderers freely available (they are not
part of the kit). The kit also includes some of the functionality from
the RenderMan Shading Language which enables you to create procedural
models or textures from within Python.

Even though the kit focuses on RenderMan, the new types or the Shading
Language functionality can also be used for other rendering mechanism
such as OpenGL or other renderers such as POV-Ray.

The kit should run on any platform where Python (and a C/C++ compiler)
is available. Windows users can download a binary version for Python
2.2 and Python 2.3.


What's new?
-----------

There are two new modules:

- cgkitinfo: Retrieve version information
- slparams: Extract RenderMan shader parameters from shader source

Other changes:

- The quaternion class has some new methods such as slerp() and
squad() (thanks to Max Rheiner)
- The RenderMan binding supports string handles and the (corrected)
version number can be suppressed (thanks to Moritz M?ller)

For a full list of changes see the changelog.


For more information, visit:

http://cgkit.sourceforge.net


- Matthias -



From jjl at pobox.com  Wed Jan 14 15:40:16 2004
From: jjl at pobox.com (John J. Lee)
Date: 14 Jan 2004 20:40:16 +0000
Subject: Why learn Python ??
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<btubno$bd8k6$1@ID-46268.news.uni-berlin.de>
	<100655fo84c2211@corp.supernews.com>
	<btv7gf$btv1p$1@ID-46268.news.uni-berlin.de>
	<87d69og2jl.fsf@pobox.com>
	<bu0v9v$c6nr4$1@ID-46268.news.uni-berlin.de>
	<873cajafr8.fsf@pobox.com>
	<bu1gt7$cn6mk$1@ID-46268.news.uni-berlin.de>
Message-ID: <873cai2rin.fsf@pobox.com>

"Derek" <none at none.com> writes:

> "John J. Lee" wrote:
[...]
> > for the
> > great majority of projects, optimisation does not require
> > implementation of the *entire* system in a language like
> > C++.  The sum of C++ and Python is greater than the parts.
> 
> Python and C++ can also be a bigger mess than sum of either part.
> Take your pick.

Not entirely sure what you mean, so I'll try and restate it:

You're saying that the C++ code for a Python extension is uglier than
the equivalent C++ code you'd write for a pure-C++ solution, where the
C++ code in question is that used to solve the *small part* of the
*whole* problem that you've farmed out to C++.  Right?

Actually, I think that's only true if you're writing wrappers in C on
the C API level.  Leaving that important point aside, though, the
choice we're discussing here is between:

1. Most code in Python, plus small amount (say 10 percent) of C/C++
   code plus ugly code to wrap it (or the latter two mixed up
   together, if you prefer).

2. All code in C++.


For cases where it meets the performance requirements, 1 is preferable
to 2 because, even given an overhead of ugliness (which I dispute,
thanks to SWIG and Boost Python) in that 10 percent of the problem
recoded in C++, you make a saving on the other 90 percent that (far!)
more than compensates.  A ratio of 5-10 in terms of lines of code is
often quoted, and that ratio applies to 90% of the project.


John


From swalters_usenet at yahoo.com  Mon Jan 12 15:22:18 2004
From: swalters_usenet at yahoo.com (Samuel Walters)
Date: Mon, 12 Jan 2004 20:22:18 GMT
Subject: How to intercept a keypress using python?
References: <ae453155.0401120950.39f16df8@posting.google.com>
Message-ID: <pan.2004.01.12.20.20.55.580426@yahoo.com>

|Thus Spake Ticachua On the now historical date of Mon, 12 Jan 2004
09:50:38 -0800|

> Hello all,
> 
> Does anyone know how to intercept user's keypress or mouseclick in Python?
> I'd like to write a small tool (Python-based preferrably) running on
> Windows to capture the user's keypresses and mouseclicks and write them to
> a file.
> 
> Thanks for your help.

Some people in alt.2600 and alt.crackers will certainly know where to find
such tools.  Have you asked there?

-- 
Never forget the halloween documents.
http://www.opensource.org/halloween/
""" Where will Microsoft try to drag you today?
    Do you really want to go there?"""



From jjl at pobox.com  Mon Jan 26 14:48:45 2004
From: jjl at pobox.com (John J. Lee)
Date: 26 Jan 2004 19:48:45 +0000
Subject: Guardian: open source is a throwback says Jack Schofield
References: <64cff82f.0401251143.328388bd@posting.google.com>
Message-ID: <87oesq5w4i.fsf@pobox.com>

malcolmny_1 at lycos.com (malcolm) writes:

> Why you can't get something for nothing
> Jack Schofield Jan 22 2004

Having bought the Guardian's Thursday edition (with the "online"
section) a few times, I know they get frequent letters complaining
about Schofield's anti-open source "bias" (which doesn't alter the
correctness of otherwise of what he says, of course).

Another quote from the article:

> Finally, a couple of weeks ago, I mentioned that the movement did not
> have any way of creating software architectures. A reader disputed
> this in Feedback, citing three programs: Perl, Python and
> Apache. These are excellent programs, but not what I'd call a software
> architecture.

I guess we have to wait, with bated breath, for Jack to define
"software architecture", then <wink>.  STOP PRESS, software industry
revolutionized by IT journalist's definition of software architecture!

Why is there so much empty name-calling in the software industry?

> Curiously, also, none of them was developed by the open source
> movement, though they have of course been adopted and improved by
> it. Larry Wall developed Perl while working at Unisys; both Python and
> Apache came out of academia.

More empty name-calling.  Academics are barred from being part of the
open source movement, apparently.


> [..]
> 
> "There are also undoubted benefits from running open source software,
> though the financial ones can be small or even negative. Companies are
> bound to be tempted by the idea of getting something for nothing .."
> 
> "The facility to fix bugs yourself and to modify programs also sounds
> attractive. However, fixing bugs is not practical for most companies,
> and modifications can be positively dangerous.

Perfectly sensible points (as is the point about "TCO", which is of
course crucially important), though he conspicuously fails to draw any
sensible conclusions from them.


> If you are really going to do these things, you need to hire several
> reliable programmers with kernel-level skills"

Hard to come up with an interpretation of that that makes sense...


> "Indeed, the whole progress of commercial computing has been from
> expensive hand-written, bug-ridden, company-specific programs to
> cheaper but more powerful off-the-shelf packages. From that point of
> view, open source is a throwback."

Eh?

It appears Schofield got employed as a columnist for "ask Jack", in
which people ask questions about why their Windows machine is broken
(no dig at MS here, if linux had achieved world domination, I imagine
they'd still be asking similar questions about that; things would
still be broken, but broken on a higher level).

No great fascination to be had from observing people's "special"
reasoning when rooting for their home side, I guess <wink>.

It's a shame, when there are perfectly good arguments to be made
against open source, that this kind of third-rate excuse for analysis
gets published.  Don't give up the day job, Jack!


> - http://www.guardian.co.uk/online/story/0,3605,1127802,00.html


John


From __peter__ at web.de  Mon Jan 26 17:24:04 2004
From: __peter__ at web.de (Peter Otten)
Date: Mon, 26 Jan 2004 23:24:04 +0100
Subject: Single and double asterisks preceding variables in function
	arguments
References: <bv3d4e$1h7$1@newshost.mot.com>
	<bv3gdg$ms0sn$1@ID-217427.news.uni-berlin.de>
	<bv3uft$r2d$1@newshost.mot.com>
Message-ID: <bv43t2$hls$00$1@news.t-online.com>

Stephen Boulet wrote:

> <<
> a={'c1':'red','c2':'blue','c3':'fusia'}
> def bar(**params):
> ....for k in params.keys():
> ........print k, params[k]
> bar(a)
> Traceback (most recent call last):
>    File "<input>", line 1, in ?
> TypeError: bar() takes exactly 0 arguments (1 given)
>  >>
> 
> Why does bar take zero arguments?

The error message is not as clear as it should should be. bar() takes 0
mandatory, 0 positional and an arbitrary number of keyword arguments, e.
g.:

>>> def bar(**params):
...     print params
...
>>> bar(color="blue", rgb=(0,0,1), name="sky")
{'color': 'blue', 'rgb': (0, 0, 1), 'name': 'sky'}

That's the standard way of passing optional keyword arguments, but you can
also pass them as a dictionary preceded by **:

>>> adict = {'color': 'blue', 'rgb': (0, 0, 1), 'name': 'sky'}
>>> bar(**adict)
{'color': 'blue', 'rgb': (0, 0, 1), 'name': 'sky'}

This is useful, if you want to compose the argument dict at runtime, or pass
it through to a nested function.

> 
> Hmm, but:
> 
> <<
> def bar2(*params,**moreparams):
> ....print "params are ", params,'\n'
> ....for k in moreparams.keys():
> ........print k, moreparams[k]
> ....print "moreparams are ", moreparams

bar2() accepts 0 mandatory, as many positional and keyword arguments as you
like. For the expected result, try 

>>> def bar2(*args, **kwd):
...     print args
...     print kwd
...
>>> bar2(1,2,3)
(1, 2, 3)
{}
>>> bar2(1, name="sky", color="blue")
(1,) # tuple of optional positional args
{'color': 'blue', 'name': 'sky'} # dict of optional keyword args
>>>

And now a bogus example that shows how to compose the arguments:

>>> def bar3(x, *args, **kwd):
...     print "x=", x
...     print "args=", args
...     print "kwd=", kwd
...     if "terminate" not in kwd:
...             kwd["terminate"] = None # avoid infinite recursion
...             bar3(x*x, *args + ("alpha",), **kwd)
...
>>> bar3(2, "beta", color="blue")
x= 2
args= ('beta',)
kwd= {'color': 'blue'}
x= 4
args= ('beta', 'alpha')
kwd= {'color': 'blue', 'terminate': None}
>>>

To further complicate the matter, a mandatory arg may also be passed as a
keyword argument:

bar3(x=2, color="blue") # will work, args is empty
bar("beta", # will not work; both "beta" and 2 would be bound to x
            # and thus create a conflict                
    x=2, color="blue")


Peter



From no.spam  Sun Jan 18 15:09:17 2004
From: no.spam (Christophe Delord)
Date: Sun, 18 Jan 2004 21:09:17 +0100
Subject: Determining a replacement dictionary from scratch
References: <4b805376.0401181116.3b0adb41@posting.google.com>
Message-ID: <20040118210917.4e046a24.no.spam@box>

On 18 Jan 2004 11:16:31 -0800, Dan wrote:

> Hello,
> 
> I'd like to be able to take a formatted string and determine the
> replacement dictionary necessary to do string interpolation with it. 
> For example:
> 
> >>> str = 'his name was %(name)s and i saw him %(years)s ago.'
> >>> createdict( str )
> {'name':'', 'years':''}
> >>>
> 
> Notice how it would automatically fill in default values based on
> type.  I figure since python does this automatically maybe there is a
> clever way to solve the problem.  Otherwise I will just have to parse
> the string myself.  Any clever solutions to this?
> 
> Thanks 
> -dan

You can use the % operator to look for such constructions. You just
need to define the __getitem__ method of a class to store the
variable names. What about this function:

def createdict(format):
    class grab_variables:
        def __init__(self):
            self.variables = {}
        def __getitem__(self, item):
            self.variables[item] = ''
    g = grab_variables()
    format%g
    return g.variables

print createdict('his name was %(name)s and i saw him %(years)s ago.')

{'name': '', 'years': ''}


Best regards,
Christophe.


From tjreedy at udel.edu  Tue Jan 27 21:47:33 2004
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 27 Jan 2004 21:47:33 -0500
Subject: Confused about a list.sort()
References: <S6FRb.2098$P17.1139@fed1read03>
Message-ID: <bv77rl$ns8$1@sea.gmane.org>


"Amy G" <amy-g-art at cox.net> wrote in message
news:S6FRb.2098$P17.1139 at fed1read03...
> I have a list of numbers... actully I have two lists, List 1 is a list of
> number strings and List2 is one of numbers.
>
> List 1 example:
> List1 = [ '20040124123000', '20040124123001', '20040125012456']
>
> List 2 example:
> List2 = [ 20040124123000L, 20040124123001L, '20040125012456L]
>
> When I try either:
> List1 = List1.sort ... or
> List2 = List2.sirt
>
> and then...
> print List1... or
> print List2
>
> I get None.
>
> Why is this?
> How do I remedy this problem?

Read the library reference manual on builtin objects - sequences -  lists -
methods.

Seriously.

TJR






From irmen at -NOSPAM-REMOVETHIS-xs4all.nl  Fri Jan  9 08:21:12 2004
From: irmen at -NOSPAM-REMOVETHIS-xs4all.nl (Irmen de Jong)
Date: Fri, 09 Jan 2004 14:21:12 +0100
Subject: Bruce Eckel example / CGI server for localhost for Windows XP
 possible?
In-Reply-To: <cb035744.0401090507.2802a281@posting.google.com>
References: <cb035744.0401090507.2802a281@posting.google.com>
Message-ID: <3ffeaac9$0$321$e4fe514c@news.xs4all.nl>

Will Stuyvesant wrote:
> Is there anybody who can provide simple example code like found in
> Fredrik Lundh's Python Standard Library book for setting up a CGI
> server for localhost with Python? 

Not sure if this helps, but do you require a CGI style server?
Does it need to be extremely small and simple (though that's relative)?
If not, and servlet-style intelligent web applications also suit
your needs, you might be able to pick one of Python's web frameworks
and just run that on your local machine. Most won't need Apache.

At least, mine doesn't: Snakelets http://snakelets.sourceforge.net

I've heard from one user that he's using Snakelets to run a
web application off a CD-ROM...
(try an older Snakelets version <1.20 for that).

Good luck
--Irmen de Jong.


From steveb428pleaseremovethis at hotmail.com  Sun Jan 18 12:06:06 2004
From: steveb428pleaseremovethis at hotmail.com (DilbertFan)
Date: Sun, 18 Jan 2004 17:06:06 GMT
Subject: Using python for _large_ projects like IDE
References: <930ba99a.0401180625.5863acd4@posting.google.com>
Message-ID: <22zOb.2835$Zk3.135@newssvr29.news.prodigy.com>

If you do write this  IDE, please include a compiler warning that catches
the missing () at the end of a function that doesn't have arguments.  I've
sunk into a dark world of a diabolically mind-destroying hysteria while
trying to troubleshoot some scripts, and then realizing that a python
function was not executing because I was calling it without '()'.  But
Python doesn't complain, or give you a message or anything,... it simply
doesn't execute that function!

Big reason I forget the empty parenthesis: I do Delphi also, and it doesn't
require it.

(Meanwhile, for Python I'm using Komodo, which is really good.  Funny how I
keep upgrading UltraEdit when I go ahead and register more language-specific
tools anyway )

"Sridhar R" <sridharinfinity at yahoo.com> wrote in message
news:930ba99a.0401180625.5863acd4 at posting.google.com...
> Hi,
>
> I am a little experienced python programmer (2 months).  I am somewhat
> experienced in C/C++.  I am planning (now in design stage) to write an
> IDE in python.  The IDE will not be a simple one.  I had an idea of
> writing the IDE in C/C++, as it is a big project, bcoz of the
> following
>
> 1. if python is used, then the memory required for running the IDE
> will be high.
> 2. if pure python is used, the IDE will be slower.
>
> I'm not sure whether they are true.
>
> Then I thought of using python for 90% of the code and using C for
> other performance critical part.  But the problem is in identifying
> the performance critical code.  People suggest to start with pure
> python and then _recode_ the performance critical code after profiling
> the original code.  But I fear whether there will be a conflit in say
> data structures.  Not yet expert in extending/embedding python.
> Are there any ways to forsee the performance critical parts?
>
> Also, any suggestions on reducing memory usage of big applications
> written in python?




From ark at acm.org  Fri Jan 23 09:46:53 2004
From: ark at acm.org (Andrew Koenig)
Date: Fri, 23 Jan 2004 09:46:53 -0500
Subject: I support PEP 326
In-Reply-To: <4010C5D3.9060702@prescod.net>
Message-ID: <001301c3e1bf$be53ec40$6402a8c0@arkdesktop>

> Calling min with no arguments need not be the same as calling it with an
> empty sequence argument. That is not necessarily an argument for making
> the empty function call return something arguably strange...

I agree with you that it's strange, but it's right.  It might interest you
to know that APL has behaved the same way for more than 35 years.  In APL,
the usual way of obtaining the largest positive value is to ask for the
lowest element of an empty sequence.

In Python, if you give min or max a single argument, it is assumed to be a
sequence, and if that sequence is empty, you get an exception.  If you give
it more than one argument, those arguments are treated as elements of a
sequence, and you get an exception if there are no arguments (i.e. if the
sequence is empty).

Therefore, if min([]) were to return Max (which, although surprising, I
still think is reasonable), then min() should also return Max.





From nomail at edu  Sun Jan 18 11:16:36 2004
From: nomail at edu (Izzie)
Date: Sun, 18 Jan 2004 11:16:36 -0500
Subject: Using python for _large_ projects like IDE
In-Reply-To: <930ba99a.0401180625.5863acd4@posting.google.com>
References: <930ba99a.0401180625.5863acd4@posting.google.com>
Message-ID: <OcCdnYKzXNLMLJfdRVn2tQ@giganews.com>

Sridhar R wrote:

> I am a little experienced python programmer (2 months).  I am somewhat
> experienced in C/C++.  I am planning (now in design stage) to write an
> IDE in python.  The IDE will not be a simple one.  I had an idea of
> writing the IDE in C/C++, as it is a big project, bcoz of the
> following

Don't bother, there are many good IDEs that can be used with python,
there are even more excellent text editors that (IMO) are better
than all IDEs that I tried. Why waste you time?

i.




From jcarlson at uci.edu  Wed Jan 21 16:09:52 2004
From: jcarlson at uci.edu (Josiah Carlson)
Date: Wed, 21 Jan 2004 13:09:52 -0800
Subject: Assignment to slice
References: <mailman.604.1074712550.12720.python-list@python.org>
Message-ID: <20040121130236.D8E3.JCARLSON@uci.edu>

> Instead python will just tack stuff on to the front of
> the array. Which, I still believe, is totally
> inconsistent. But what do I know? I have about 5
> minutes of python experience.

> Oh well. Maybe my problem is that I'm using perl as my
> model of consistency. Plus, it's a minor issue anyway.
> I just need to be aware of it, and not try to write
> perl code in python. I need to learn to write python
> code in python.

There are a few choices that one can make when allowing slice reading
and writing in sequences.  Python made one: never cause an exception for
integer arguments, and certain indices map to the same location.  Perl
made another: extend the sequence if necessary to fill it out.

Both are consistant and predictable.  Python does it one way, Perl does
it another.  Heck, Python has variable definitions that are done one way,
Perl has variable definitions that are done another.  They were choices
made during the creation that fit a paradigm.

Expecting Python to behave like Perl is like expecting your mother to
pee standing up; without alteration, it's not gonna happen.

 - Josiah



From ville.spamstermeister.vainio at thisisspamprotectiontut.finland  Thu Jan 22 01:31:07 2004
From: ville.spamstermeister.vainio at thisisspamprotectiontut.finland (Ville Vainio)
Date: 22 Jan 2004 08:31:07 +0200
Subject: Nokia prefers Python
References: <mKTIlIA10uDAFwGM@jessikat.fsnet.co.uk>
	<mailman.615.1074721711.12720.python-list@python.org>
Message-ID: <du7n08gv6j8.fsf@lehtori.cc.tut.fi>

>>>>> "Mike" == Mike C Fletcher <mcfletch at rogers.com> writes:

    >> This might be the start of a success story. Says Nokia prefers
    >> Python!

    Mike> Oh, neat.  Someone was looking for a series 60 developer a

"Neat". That has got to be the understatement of the year. 

My job is w/ Symbian OS, and this definitely made my day. We'll see
how they are carrying it through, and how people could help.

-- 
Ville Vainio   http://tinyurl.com/2prnb


From fnord at u.washington.edu  Sat Jan  3 21:53:19 2004
From: fnord at u.washington.edu (Lonnie Princehouse)
Date: 3 Jan 2004 18:53:19 -0800
Subject: Abstract Syntax Tree conundrum
References: <f70e3538.0401021114.1f57622e@posting.google.com>
	<oODJb.17938$lo3.17733@newsread2.news.pas.earthlink.net>
Message-ID: <f70e3538.0401031853.3c1d9e65@posting.google.com>

Andrew Dalke wrote in message 

> Does this help?
> >>> compiler.pycodegen.ModuleCodeGenerator(x).getCode()

Yes!  It's exactly what I was looking for.  Thanks very much =)



-ljp


From paradisejourney at hotmail.com  Thu Jan 15 07:15:52 2004
From: paradisejourney at hotmail.com (aj)
Date: 15 Jan 2004 04:15:52 -0800
Subject: what is best for web development??
References: <f046efac.0401100358.5aa812a0@posting.google.com>
	<87wu80559x.fsf@blakie.riol>
	<f046efac.0401120330.5c2e7c50@posting.google.com>
	<87oet9grqy.fsf@blakie.riol>
Message-ID: <14ba0c0.0401150415.121f31f2@posting.google.com>

hi 
i am a newbi to python and developing a web application
what do u all think is the best application framework for developing
web application in python. I want a framework that supports
templates,database connectivity, is available for both unix and
windows.
Zope
Quixote
Draco or others
I read some stuff about all these frameworks and i think zope is a good one
But wanna know what you all think


Wilk <wilkSPAM at OUTflibuste.net> wrote in message news:<87oet9grqy.fsf at blakie.riol>...
> ketulp_baroda at yahoo.com writes:
> 
> > Wilk <wilkSPAM at OUTflibuste.net> wrote in message news:<87wu80559x.fsf at blakie.riol>...
> >> ketulp_baroda at yahoo.com writes:
> >> 
> >> > i am developing a web application and i am really confused on what should i use.
> >> > should i use just python and use the cgi module availabe.
> >> > Or should i use application like WebWare.Also there is PSP available.
> >> > I am really confused and need help
> >> 
> >> It depends of the kind of application you want to do exactly, there are
> >> many possibilities from cgi to zope...
> >> 
> >> Look into the archive of the list, you'll find a lot of answer to this
> >> question. Or describe more what you need.
> >> 
> >> bye
> >
> >
> > hey thanks for ur reply
> > i am developing an issue tracking system 
> 
> There is one that you can look at : http://roundup.sf.net
> I think it can be used in standalone server or cgi.
> 
> > the primary requirements are
> > 1)it should be platform independent which i think python will take
> > care of
> > 2)it should have customizable gui .I am thinking of using templates
> > for this like Cheetah. Is there any other better solution to Cheetah?
> 
> There is no better solution than Cheetah : there is others solutions...
> 
> > The problem i am facing here is i dont know what to use for
> > development of the application. I came across many ways to develop web
> > application in python which I already specified like
> > i)the cgi module in python
> > ii)Python Server Pages
> > iii)Quixote
> > iv)WebWare
> > v)Zope etc.
> > I want to choose such an environment so that i dont have to install
> > other softwares to run my application.For eg. I think if I develop
> > using zope then the client also has to install zope to run my software
> > and i dont want this.
> 
> When you use one of theses servers, you don't need to install anything
> else than a classic browser on the client side.
> On the server side, most of the servers will not need anything else, you
> can even start without server with the batterie include :
> BasicHTTPServer (it was somes examples on this list somes days ago).
> 
> bye


From theller at python.net  Fri Jan 16 14:40:08 2004
From: theller at python.net (Thomas Heller)
Date: Fri, 16 Jan 2004 20:40:08 +0100
Subject: ctypes 0.6.3 released
Message-ID: <r7xzadif.fsf@python.net>

It's release day ;-)

ctypes 0.6.3 released
=====================

Overview

    'ctypes' is a Python package to create and manipulate C data types
    in Python, and to call functions in dynamic link libraries/shared
    dlls. It allows wrapping these libraries in pure Python.

    It works on Windows, Linux and MacOS X (the latter require that
    your machine is supported by libffi).


Changes

    A critical bug with pointer instances was fixed, this makes the
    'incomplete types' sample code in the tutorial actually work.

    All ctypes objects are now correctly garbarge collected.  This
    *may* lead to crashes in your program (especially with callback
    functions, or pointers handed out to longer running C code).  You
    must keep a reference in Python to any object as long as it is
    used in foreign C code.

    All other known bugs have been fixed.

    Again, a lot of changes to the COM package, but all this is still work in
    progress and unstable, and it has to be properly documented.

Homepage

    <http://starship.python.net/crew/theller/ctypes/>

Enjoy,

Thomas


From claird at lairds.com  Wed Jan 14 13:21:58 2004
From: claird at lairds.com (Cameron Laird)
Date: Wed, 14 Jan 2004 18:21:58 -0000
Subject: I come not to bury C++, but to praise it...
References: <mailman.337.1074032524.12720.python-list@python.org>
	<bu3khe$dbm5v$1@ID-46268.news.uni-berlin.de>
	<100aq779r2h2c9e@corp.supernews.com>
	<donn-DF9867.09340714012004@nntp3.u.washington.edu>
Message-ID: <100b266i0r70g86@corp.supernews.com>

In article <donn-DF9867.09340714012004 at nntp3.u.washington.edu>,
Donn Cave  <donn at u.washington.edu> wrote:
>In article <100aq779r2h2c9e at corp.supernews.com>,
> claird at lairds.com (Cameron Laird) wrote:
>
>> In article <bu3khe$dbm5v$1 at ID-46268.news.uni-berlin.de>,
>> Derek <none at none.com> wrote:
>> 			.
>> 			.
>> 			.
>> reliability, I very much want to understand it.  Are you alluding
>> precisely to Python's dynamic typing, and observing that, as earlier
>> is better, C++'s compile-type checks beat Python's run-time checks?
>
>Your wording is precise enough that your question could have
>been better.  Note "compile type checks" vs. "run-time checks" -
>a difference not only in when, but what.  There's more to it
>than "earlier is better".
			.
			.
			.
Great!  *What* more?  When I look at Python and C++, I see the
former as having *stricter*, if more dynamic, typing, so I don't
understand what advantage C++ has in this one regard apart from
time-of-detection.

I apologize, by the way, for writing "compile-type" where I 
intended "compile-time".
-- 

Cameron Laird <claird at phaseit.net>
Business:  http://www.Phaseit.net


From jjl at pobox.com  Fri Jan 16 14:42:06 2004
From: jjl at pobox.com (John J. Lee)
Date: 16 Jan 2004 19:42:06 +0000
Subject: Python COM Server with C++
References: <a40573e7.0401151408.341bda2a@posting.google.com>
Message-ID: <8765fb7ka9.fsf@pobox.com>

andre.bernemann at gmx.de (Andre Bernemann) writes:
> I have written a Python COM Server with the help of Mark Hammond's
> Book Programming Python on Win32. I used the CreateObjects method in
> VB to access the COM Methods and all worked fine. Unfortunately, that
> is not what i really want. First I'd like to make the COM Server
> accessible from C++ and as a beside product I want to use early

I'd do this in ctypes, although its COM support is still quite new.
win32com (from win32all, aka Python for Windows Extensions, which is
what you're probably using ATM) has recently grown support for
implementing vtable interfaces (but not calling them, IIRC), but I
suspect one is less likely to get stuck when using ctypes, since
everything is pretty close to the way you'd do in in C (COM makes that
quite complicated, of course, but I think the ctypes COM support is
fairly 'thin' -- probably a good thing, IMHO -- but also elegant).


> binding within VB with the NEW operator. I've googled around alot, but
> I still have not the complete picture of what to do.

Take at look at win32/com/samples/server in the ctypes package -- an
example of implementing a dual interface.  I haven't tried a dual
interface myself, but, as COM goes, it all looks very simple and
elegant.


> So far I think I have to create an IDL file to describe the interface
> and compile it with the MIDL Compiler. There ist my first question.
> What do I have to create first, the IDL file or the Python COM Server?

IDL first.  This is explained in the little comment at the top of the
sample.


> I'm a little bit confused about dispid's, the GUID's and naming
> conventions. Do i need to make use of the makepy Utility in any way?

I don't know how one implements vtable/dual interfaces in win32com.


> Do I have to modify the Python COM Server Source Code in any way or
> can I use it as it is? (I can post the code here on request)
[...]

ditto


John


From fowlertrainer at anonym.hu  Mon Jan  5 10:40:50 2004
From: fowlertrainer at anonym.hu (fowlertrainer at anonym.hu)
Date: Mon, 5 Jan 2004 16:40:50 +0100
Subject: Python-list Digest, Vol 4, Issue 38
In-Reply-To: <E1AdV6k-0000B0-7v@mail.python.org>
References: <E1AdV6k-0000B0-7v@mail.python.org>
Message-ID: <16129653189.20040105164050@anonym.hu>

Hello !

I have used mod_python. But it is don't reload my modules when I
editing them.

I try with this:
--------------------
# Module importer
import os
import traceback
import kinterbasdb
import sys
import time
import threading
import imp
import stat

ImpLock=threading.Lock()
IModuleDir="C:/bhaweb/modules"
IModules={}

def LoadModule(ModName):
    fp, pathname, description = imp.find_module(ModName)
    try:
      mod=imp.load_module(ModName, fp, pathname, description)
      print mod
      sys.modules[ModName]=mod
    finally:
      # Since we may exit via an exception, close fp explicitly.
      if fp: fp.close()

def ImportModules(Modules):
    ImpLock.acquire()
    try:
        if not (IModuleDir in sys.path): sys.path.append(IModuleDir)
        # Do imports, if needed
        print Modules
        for m in Modules:
            sf=IModuleDir+"/"+m+".py"
            if sys.modules.has_key(m):
               sd=os.stat(sf)
               lm=sd[stat.ST_MTIME]
               if IModules.has_key(m):
                  dd=IModules[m]
                  if (dd<>lm):
                     print "ReLoad"
                     reload(sys.modules[m])
               IModules[m]=lm
            else:
               print "Load"
               LoadModule(m)
               sd=os.stat(sf)
               lm=sd[stat.ST_MTIME]
               IModules[m]=lm
            '''
            import s
            sf=IModuleDir+"/"+s


            '''
        print IModules
    finally:
        ImpLock.release()

#for k in sys.modules.keys(): print k,sys.modules[k]
'''
f=file(IModuleDir+"/test.py","w")
f.write("print 1")
f.close()
'''
#print os.stat(IModuleDir+"/test.py")[stat.ST_MTIME]
#sys.exit()
'''
ImportModules(["test"])
f=file(IModuleDir+"/test.py","w")
f.write("print 2")
f.close()
time.sleep(2)
ImportModules(["test"])
'''
ImportModules(["test"])
BHASession.test()
--------------------
test.py is this:
def test():
    print 1
--------------------
But python is say:

> Executing: C:\Program Files\ConTEXT\ConExec.exe "C:\Python\python.exe" "C:\bhaweb\modules\ModImport.py"

['test']
Load
<module 'test' from 'C:\bhaweb\modules\test.pyc'>
{'test': 1073316581}
Traceback (most recent call last):
  File "C:\bhaweb\modules\ModImport.py", line 75, in ?
    BHASession.test()
NameError: name 'BHASession' is not defined
> Execution finished.

I run this in native mode, but do this in under mod_apache also.

Why ? What I do wrong ?
Plase send the email in private also, because I'm in digest mode.

Thanx:
 KK




From ville.spamstermeister.vainio at thisisspamprotectiontut.finland  Sat Jan 24 05:15:22 2004
From: ville.spamstermeister.vainio at thisisspamprotectiontut.finland (Ville Vainio)
Date: 24 Jan 2004 12:15:22 +0200
Subject: [OPINION] - does language really matter if they all do the
	samething?
References: <69A0D4AB81C51447AD6BA387782B8D64093D8A@midl-mail4.etcconnect.com>
	<mailman.718.1074902671.12720.python-list@python.org>
Message-ID: <du77jzhr6th.fsf@amadeus.cc.tut.fi>

>>>>> "Dietrich" == Dietrich Epp <dietrich at zdome.net> writes:

    Dietrich> Example: I wrote a project in Python which reads some
    Dietrich> data files and uses them to make a decision (sort of).
    Dietrich> I got it to about 90% functionality, and realized that
    Dietrich> the last 10% was extremely difficult to do with Python.
    Dietrich> After writing one Lisp macro of exactly 13 lines, I
    Dietrich> rewrote the entire program, incorporating the data into
    Dietrich> Lisp files which were not only much shorter, but much
    Dietrich> clearer, easier to read, etc.  I just couldn't think of
    Dietrich> a way to write this program in Python without a lot of
    Dietrich> code replication.

Soon you can, with projects like
http://www.caddr.com/code/lython/.

I can imagine problems like yours can be fixed by writing a teensy bit
of Lisp to process the data, and then throw the results back to good
old Python to do the rest. Lisp-like stuff can be integrated and
implemented quite easily in Python, even if we lose the native
compilation aspect of Lisp.

    Dietrich> never consider doing in anything but Python, except the
    Dietrich> occasional hardcore text processor which causes physical
    Dietrich> pain to write in anything but Perl or Ruby.

Any examples? Off the top of my head I can't think of anything...

-- 
Ville Vainio   http://tinyurl.com/2prnb


From zensunni at rochester.rr.com  Sat Jan 24 22:47:17 2004
From: zensunni at rochester.rr.com (Brian Samek)
Date: Sun, 25 Jan 2004 03:47:17 GMT
Subject: Newbie Nested Function Problem
References: <O4GQb.12838$Tk3.10642@twister.nyroc.rr.com>
	<52d610h685a613ua1tk5k8f11cv1d61q0b@4ax.com>
Message-ID: <9%GQb.77000$Su5.22817@twister.nyroc.rr.com>

> Okay, ask_number doesn't do what you're saying.  It's asking for a number,
> placed into variable number, and if it gets something out of range, prints
> an error message.
>
> And then ends.  It doesn't either a) repeat until it gets a valid number
> or b) do anything with the number it gets, like pass it back to the caller
> in a return statement, i.e.:
>

It does repeat if it doesn't get a valid number.  The function calls itself
after printing an error mesage.  For some reason the original message
formatted itself differently when I pasted it into my mail program.  The
line just before the first else statement should be indented to the same
level as the line before it so it reads:

def ask_number():
    number = input("Please enter a number.\n")
    if number > 500 or number - int(number) != 0 or number < 1:
        print "Input positive integers less then 501 only, please."
        ask_number()
    else:



>   return number
>
> > ask_number()
>
> Okay, you invoked ask_number, but didn't even try to get anything from it.
> Normally, this would read something like:
>
> number_in = asknumber()
>

What do you mean by I "didn't even try to get anything from it."  I get a
variable called "number" from it from which the countdown(number) function
counts down.

> >    else:
>
> Um.. it looks like you're inadvertably making this a deeply recursive
> call, probably something you want to stay away from until you have regular
> stuff down pat.

I don't understand what you're saying.  I designed the program as three
functions nested within each other.  Are you saying I should be designing it
differently?  I made it a series of nested functions because, for example, I
needed to use the "number" variable from ask_number before it was destroyed.
When a function ends, any variables it has created are destroyed.

Thanks,

Brian




From jjl at pobox.com  Tue Jan  6 11:02:12 2004
From: jjl at pobox.com (John J. Lee)
Date: 06 Jan 2004 16:02:12 +0000
Subject: RELEASED: allout-vim 031229
References: <mailman.26.1072753109.8134.python-list@python.org>
	<pan.2003.12.31.05.47.10.999283@yahoo.com>
	<mailman.70.1072876780.8134.python-list@python.org>
	<pan.2003.12.31.14.49.29.838030@yahoo.com>
	<mailman.72.1072888283.8134.python-list@python.org>
	<yfsr7ykb8a4.fsf@black132.ex.ac.uk>
	<mailman.17.1072988207.12720.python-list@python.org>
	<87d69yqsos.fsf@pobox.com>
	<95aa1afa.0401060522.630e5cbb@posting.google.com>
Message-ID: <87d69xawvv.fsf@pobox.com>

michele.simionato at poste.it (Michele Simionato) writes:

> jjl at pobox.com (John J. Lee) wrote in message news:<87d69yqsos.fsf at pobox.com>...
> > Fran?ois Pinard <pinard at iro.umontreal.ca> writes:
> > No, actually, a *real* OT comment: I'm pretty sure I've seen two big
> > pieces of code, by two French authors, in which the word "eventually"
[...]
> "Eventuellement" (or the Italian "eventualmente")
> means "possibly", not "eventually".

Ah, of course.  I was sure I'd looked for a false friend in my French
dictionary, but I guess I can't have done...


John


From tim.golden at viacom-outdoor.co.uk  Fri Jan 30 09:27:47 2004
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Fri, 30 Jan 2004 14:27:47 -0000
Subject: NetGetAnyDCName() - get PDC of a foreign WinNT-domain
Message-ID: <F1921F85572CB04D9F55B14BDC76B3E44346AE@tdi_nt9.internal.viacom-outdoor.co.uk>

>-----Original Message-----
>From: usenet at mail-2-me.com [mailto:usenet at mail-2-me.com]
>Sent: 30 January 2004 12:45
>To: python-list at python.org
>Subject: Re: NetGetAnyDCName() - get PDC of a foreign WinNT-domain
>
>
>Tim Golden <tim.golden at viacom-outdoor.co.uk> wrote in message 
>news:<mailman.844.1075198899.12720.python-list at python.org>...
>> [... snip my suggestion of pdc = win32net.NetGetAnyDCName (None,
>> "name_of_other_domain") ...]
>> 
>> >From: usenet at mail-2-me.com [mailto:usenet at mail-2-me.com]
>> >
>> >Thanks for your help, but that does not work. I get an error message
>> >which sais it can't reach the domain.
>> >But I'm sure did not make an syntax-error, because if I enter my own
>> >domain it works.
>> >
>> >Any other idea?
>> >
>> >Dirk
>> >
>> >
>> 
>> To ask the obvious question: do you definitely have all
>> the necessary security / connectivity in place to reach
>> the domain controller on that domain?
>
>
>I can reach the other domains and I have all rights. That's no 
>the problem.
>
>Dirk

Could you dump a cut-and-paste of the interpreter, so
we can see what's happening? This is what I get, altho'
as I say, I don't have another domain. Is yours the same?

<dump>

ActivePython 2.2.3 Build 227 (ActiveState Corp.) based on
Python 2.2.3 (#42, Nov 13 2003, 09:57:55) [MSC 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import win32net
>>> win32net.NetGetAnyDCName ()
u'\\\\VOBDC1'
>>> win32net.NetGetAnyDCName (None, "VOUK")
u'\\\\VOBDC1'
>>> win32net.NetGetAnyDCName (None, "non-existent")
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
pywintypes.error: (1355, 'NetGetAnyDCName', 'The specified domain either
does not exist or could not be contacted.')
>>>

</dump>

TJG


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From gandalf at geochemsource.com  Tue Jan 27 05:47:04 2004
From: gandalf at geochemsource.com (Gandalf)
Date: Tue, 27 Jan 2004 11:47:04 +0100
Subject: TELNET instead PING
References: <5f505344.0401260332.184d4225@posting.google.com>	<401571B9.F9DF99D0@engcorp.com>	<mailman.807.1075148925.12720.python-list@python.org>
	<tec5vb.40b.ln@energy.uch.net>
Message-ID: <401641A8.508@geochemsource.com>

>
>> Note: that reason you talked about is most likely a packet filtering 
>> firewall. A good firewall
>> can block PING, Telnet, Nbsession and many others. In most cases, the 
>> best policy
>> is to lock everything by default and permit only the ones you really 
>> want. Firewall
>> rules can include source addresses too. It is possible that a 
>> computer do not respond
>> on PING and TELNET ports for you but it does for a similar request 
>> from another
>> computer. I think there is no universal way to determine if a remote 
>> host is alive or not.
>
>
> If we are talking about IP network segment in the same ethernet layer, 
> can you ignore my ARP request - who-has <your-ip> ?
>
Probably I cannot. :-)
But this applies only when you are in the same segment.
By the way, is it possible to send an ARP request from pure Python? ;-)
AFAIK Python provides tools for level 3 and above only.




From rainerd at eldwood.com  Sat Jan  3 14:38:57 2004
From: rainerd at eldwood.com (Rainer Deyke)
Date: Sat, 03 Jan 2004 19:38:57 GMT
Subject: Integer math question
References: <3987e01c.0401030832.114c6f2a@posting.google.com>
	<11EJb.20461$Vl6.3782481@news20.bellglobal.com>
Message-ID: <kTEJb.724242$HS4.5376202@attbi_s01>

Sean Ross wrote:
> a = bq + r       and  0<=r<b       [1]

But 0 <= r < b is a contradiction when b < 0.

-- 
Rainer Deyke - rainerd at eldwood.com - http://eldwood.com




From jmdeschamps at cvm.qc.ca  Fri Jan 16 16:51:35 2004
From: jmdeschamps at cvm.qc.ca (jmdeschamps)
Date: 16 Jan 2004 13:51:35 -0800
Subject: Analysing Word documents (slow) What's wrong with this code please!
Message-ID: <3d06fae9.0401161351.75e7f5a@posting.google.com>

Anyone has a hint how else to get faster results?
(This is to find out what was bold in the document, in order to grab
documents ptoduced in word and generate html (web pages) and xml
(straight data) versions)

# START ========================
import win32com.client
import tkFileDialog, time

# Launch Word
MSWord = win32com.client.Dispatch("Word.Application")

myWordDoc = tkFileDialog.askopenfilename()

MSWord.Documents.Open(myWordDoc)

boldRanges=[]  #list of bold ranges
boldStart = -1
boldEnd = -1
t1= time.clock()
for i in range(len(MSWord.Documents[0].Content.Text)):
    if MSWord.Documents[0].Range(i,i+1).Bold  : # testing for bold
property
        if boldStart == -1:
            boldStart=i
        else:
            boldEnd= i
    else:
        if boldEnd != -1:
            boldRanges.append((boldStart,boldEnd))
            boldStart= -1
            boldEnd = -1          
t2 = time.clock()
MSWord.Quit()

print boldRanges  #see what we got
print "Analysed in ",t2-t1
# END =====================================

Thanks in advance


From antonmuhin at rambler.ru  Wed Jan 14 05:46:48 2004
From: antonmuhin at rambler.ru (anton muhin)
Date: Wed, 14 Jan 2004 13:46:48 +0300
Subject: Inserting while itterating
In-Reply-To: <pan.2004.01.14.08.43.00.894047@thomas-guettler.de>
References: <pan.2004.01.14.08.43.00.894047@thomas-guettler.de>
Message-ID: <bu36rd$d4icv$1@ID-217427.news.uni-berlin.de>

Thomas Guettler wrote:

> Hi,
> 
> Simple excerise:
> 
> You have a sorted list of integers:
> l=[1, 2, 4, 7, 8, 12]
> 
> and you should fill all gaps:
> 
> result == [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]
> 
> How would you code this?
> 
> Constrain: The original list should be changed,
> don't create a copy.
> 
>   thomas
> 

1:

previous = l[0]
current = 1

while current < len(l):
     for e in range(previous + 1, l[current]):
         l.insert(current, e)
         current += 1
     previous = l[current]
     current += 1


2:

first, last = l[0], l[-1]
for _ in range(len(l)): l.pop()
l.extend(range(first, last + 1))

:)

hth,
anton.


From tdelaney at avaya.com  Tue Jan  6 21:27:35 2004
From: tdelaney at avaya.com (Delaney, Timothy C (Timothy))
Date: Wed, 7 Jan 2004 13:27:35 +1100
Subject: Pre-PEP: Dynamically evaluating default function arguments
Message-ID: <338366A6D2E2CA4C9DAEAE652E12A1DE010633FF@au3010avexu1.global.avaya.com>

> From: Daniel Ehrenberg
> 
> I'm sorry I wasted your time, everyone.

IMO it's not a waste of time for this PEP to be written. Unfortunately, not many people are willing to formally document something that they would like to see when the guaranteed result is that it will be rejected.

Tim Delaney



From jcarlson at uci.edu  Tue Jan 20 17:09:01 2004
From: jcarlson at uci.edu (Josiah Carlson)
Date: Tue, 20 Jan 2004 14:09:01 -0800
Subject: Error with Shelve from a frozen application
References: <4378fa6f.0401201055.384a057d@posting.google.com>
Message-ID: <20040120140619.1C45.JCARLSON@uci.edu>

> Hello all,
> 
> I have searched and experimented but can't find a way to make this
> work. I have an application that I froze using py2exe which uses
> Shelve to store data for me. This is the error I am getting:
> 
> Traceback (most recent call last):
>   File "<string>", line 14, in ?
>   File "imputil.pyc", line 103, in _import_hook
>   File "<string>", line 52, in _import_top_module
>   File "imputil.pyc", line 216, in import_top
>   File "imputil.pyc", line 271, in _import_one
>   File "<string>", line 128, in _process_result
>   File "anydbm.pyc", line 62, in ?
> ImportError: no dbm clone found; tried ['dbhash', 'gdbm', 'dbm',
> 'dumbdbm']
> 
> A couple of places mentioned forcing the compiler to import the anydbm
> module. I've tried this both from within the main program and from the
> compiler options. Neither of them worked. Can someone please tell me
> how to fix this?
> 
> Thanks ahead of time,
> Marc

I've had similar problems with attempting to force encodings imports.

At the beginning of your script, give the following a try:

for i in ['dbhash', 'gdbm', 'dbm', 'dumbdbm']:
    try: eval('import '+i)
    except: pass

Send it through py2exe, and give it a shot.

 - Josiah



From peter at engcorp.com  Tue Jan 13 14:18:56 2004
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 13 Jan 2004 14:18:56 -0500
Subject: Division oddity
References: <ssn3009029rrug3l8dk1pn06tqd019ucld@4ax.com>
	<7xeku5vrn8.fsf@ruckus.brouhaha.com>
	<cdm7005r12o3o3f6gngj8no1qh74ul3733@4ax.com>
	<400413E0.5C691A56@engcorp.com>
	<7xr7y3mzsl.fsf@ruckus.brouhaha.com>
Message-ID: <400444A0.717BA7A3@engcorp.com>

Paul Rubin wrote:
> 
> Peter Hansen <peter at engcorp.com> writes:
> > > Well, the documentation for "input()" says "Equivalent to
> > > eval(raw_input(/prompt/))". Perhaps it should say "/Usually/
> > > equivalent...."
> >
> > I remember reading that too, and just assumed that at this point
> > it was in fact *implemented* that way, as a simple alias.  Maybe
> > it should be...
> 
> Python has no support for macros or aliases, and it would be silly
> to add some special kludge for input().  The user needs to be able
> to redefine the function and so forth too.

Sure it does:

def input(*args):
    return eval(raw_input(*args))

That's what I mean by "alias", anyway.... same as the implementation
which I understand is used for string.methodx(s) nowadays, which is
apparently just passed on to s.methodx().

-Peter


From rajarshi at presidency.com  Mon Jan 12 20:17:28 2004
From: rajarshi at presidency.com (Rajarshi Guha)
Date: Mon, 12 Jan 2004 20:17:28 -0500
Subject: how can I execute a function string
Message-ID: <pan.2004.01.13.01.17.27.878470.10201@presidency.com>

Hi ,
 I have some code that generates a function on the fly in a string. 
At a later point in time I want to execute this function (which also
requires a parameters to be passed to it). So the code is something like
this:

def generate_func():
	s = """ def function(x):
	print x
	return 2
"""
	return s

funcstring = generate_func()
retval = ....

That is, retval should have the value returned from the evaluation of the
function in the string funcstring.

Is this possible by means of simple function calls or does this involve
some sort of black magic?

Thanks,


From akhavr at kds.com.ua  Mon Jan 12 15:40:12 2004
From: akhavr at kds.com.ua (Andrey Khavryuchenko)
Date: Mon, 12 Jan 2004 22:40:12 +0200
Subject: script to translate from compiler AST
References: <m3d69qk10i.fsf@netmaster.kds.com.ua>
	<m3u131z7ra.fsf@pc150.maths.bris.ac.uk>
	<m3oet9hwk9.fsf@netmaster.kds.com.ua>
	<m3llodyo96.fsf@pc150.maths.bris.ac.uk>
Message-ID: <m3eku4j3yr.fsf@netmaster.kds.com.ua>

Michael,

"MH" == Michael Hudson wrote:

 MH> Andrey Khavryuchenko <akhavr at kds.com.ua> writes:
 >> Imagine, I've built an AST that I want to run.  I've not found an
 >> easy (read library) way to do that, hence the question.

 MH> Ah!  Try

 MH> http://groups.google.com/groups?th=f3f7a7f6fac16ca2

Wow, thanks!  Exactly what I need.  Unfortunately pycodegen is not yet
documented :)

-- 
Andrey V Khavryuchenko            http://www.kds.com.ua/
Silver Bullet Software Solutions  http://www.kds.com.ua/training/


From http  Sun Jan 11 01:13:07 2004
From: http (Paul Rubin)
Date: 10 Jan 2004 22:13:07 -0800
Subject: Help with if statement
References: <d91f466b.0401102201.3709771@posting.google.com>
Message-ID: <7xeku7qah8.fsf@ruckus.brouhaha.com>

jikosan83 at yahoo.com (Jikosan) writes:
> for x in range(0,N):
>     random = uniform(-1, 1)

random is a number between -1 and +1.  It's always < 1.

>     print random
>     if random < 1.0: <--- Not working
>         neg = neg+1

You mean "if random < 0.0:".


From Mike at DeleteThis.Geary.com  Sat Jan 17 02:40:11 2004
From: Mike at DeleteThis.Geary.com (Michael Geary)
Date: Fri, 16 Jan 2004 23:40:11 -0800
Subject: Need to get 8.3 path on Windows
References: <buan2h$g0e$2@news.Stanford.EDU>
Message-ID: <100hpmrm74ah548@corp.supernews.com>

Patrick L. Nolan wrote:
> Our python script uses popen to run an application on Windows XP.
> The application chokes if the filename given as a command line
> argument contains any spaces.  It's happy with the 8.3 shortname
> notation, though.  So given a file with a name like
>  c:\Documents and Settings\Joe User\Desktop\My Files\foo.dat
> I would like to be able to convert this to
>  c:\DOCUME~1\JOEUSE~1\Desktop\MYFILE~1\foo.dat
>
> This would be a fairly simple exercise in text manipulation
> except that the number may not always be 1.  If the directory
> names are not unique in the first 6 characters, there may
> be ~2 etc.

You're looking for the Windows API function GetShortPathName, which is
supported by the win32api module in Mark Hammond's Windows extensions:

>>> import win32api
>>> win32api.GetShortPathName( "C:\Program Files\Internet Explorer" )
'C:\\PROGRA~1\\INTERN~1'
>>>

This function returns the actual short name for a file or directory; it
doesn't just do a string manipulation.

-Mike




From tim.one at comcast.net  Wed Jan 14 20:24:40 2004
From: tim.one at comcast.net (Tim Peters)
Date: Wed, 14 Jan 2004 20:24:40 -0500
Subject: Cyclic garbage collection and segfaults...
In-Reply-To: <pan.2004.01.15.00.50.39.813705@NOTTHISBIT.webone.com.au>
Message-ID: <LNBBLJKPBEHFEDALKOLCIEPDIFAB.tim.one@comcast.net>

[Simon Burton]
> In my extensions python seems to segfault in the GC most of all...

That's quite likely:  gc is the only part of the system that routinely
crawls over every container in existence, so is supremely sensitive to all
manner of common C coding errors (wild stores, buffer overruns,
uninitialized memory, mixing calls to different memory subsystems on a
single object, and failure to follow the GC protocols).

> Just yesterday I removed a malloc that was (why??) causing a segfault.

Well, you certainly can't use the system malloc to obtain memory and expect
Python's garbage collection to manage it -- for gc'ed extension types, the
memory must be gotten via PyObject_GC_New() or PyObject_GC_NewVar(), and you
have to follow all the other rules too.  If you haven't read and understood
the "Supporting Cyclic Garbage Collection" section of the Python/C API
manual, you're going to get lots of segfaults.  But if you follow the rules,
you shouldn't get any.  Remember too that this is C code, not Python code,
so the result of not following a rule is more likely to be a nasty crash
than a friendly exception.




From cjw at sympatico.ca  Sun Jan  4 17:35:18 2004
From: cjw at sympatico.ca (Colin J. Williams)
Date: Sun, 04 Jan 2004 17:35:18 -0500
Subject: PythonWin problems
In-Reply-To: <9Z1Jb.15438$lo3.12939@newsread2.news.pas.earthlink.net>
References: <z5GIb.10324$Vl6.2031681@news20.bellglobal.com>
	<9Z1Jb.15438$lo3.12939@newsread2.news.pas.earthlink.net>
Message-ID: <Cy0Kb.3036$D21.332801@news20.bellglobal.com>

r.e.s. wrote:
> "Colin J. Williams" <cjw at sympatico.ca> wrote ...
> 
>>PythonWin has been my favourite IDE for quite a while.
>>
>>When one right clicks on a .py file in the Windows Explorer, among the 
>>options are Open and Edit.  The former is the default and executes 
>>Python, with the selected script.  The latter activates the PythonWin 
>>editor, with the selected script.
>>
>>Since, most frequently, I wish to edit the script, or execute it with 
>>the debugger, I tried changing the default to Edit, using the Edit File 
>>Type menu.
> 
> 
> FWIW ...
> 
> I'm not sure what you mean by "Edit File Type menu".
> Using WinXP Pro, in Windows Explorer I went to 
> Tools/Folder Options/File Types
> selected PY, clicked Advanced, and set the default to Edit.
I thought of this activity as editing.
> Now double-clicking a .py file brings it up in PythonWin,
> and I've experienced neither of the problems that you report below.
> 
> 
>>Unfortunately, this leads to a couple of problems:
>>
>>1. Any activity becomes horrendously slow, and
>>2. The following message appears:
>>    LoadBarState failed - LoadBarState failed (with win32 exception!)
>>[Dbg]>>>
> 
Many thanks to those who responded.

I used the ideas of John Roth and modified my XP registry, using 
Registrar-Lite, to read:

REGEDIT4

[HKEY_CLASSES_ROOT\Python.File]
@="Python File"
"EditFlags"=dword:00000000
"BrowserFlags"=dword:00000008

[HKEY_CLASSES_ROOT\Python.File\AutoRegister]
@="C:\\WINDOWS\\System32\\PythonCOM23.dll"

[HKEY_CLASSES_ROOT\Python.File\DefaultIcon]
@="C:\\PYTHON23\\Py.ico"

[HKEY_CLASSES_ROOT\Python.File\shell]
@="Edit"

[HKEY_CLASSES_ROOT\Python.File\shell\Edit]

[HKEY_CLASSES_ROOT\Python.File\shell\Edit\command]
@="C:\\Python23\\pythonwin.exe /edit \"%1\""

[HKEY_CLASSES_ROOT\Python.File\shell\Edit with IDLE]

[HKEY_CLASSES_ROOT\Python.File\shell\Edit with IDLE\command]
@="C:\\Python23\\Pythonw.exe C:\\Python23\\Lib\\idlelib\\idle.pyw -e \"%1\""

[HKEY_CLASSES_ROOT\Python.File\shell\open]

[HKEY_CLASSES_ROOT\Python.File\shell\open\command]
@="C:\\PYTHON23\\python.exe \"%1\" %*"

All functions well now.

Thanks.

Colin W.





From scottdog at nospam.com  Tue Jan 20 17:40:09 2004
From: scottdog at nospam.com (Dog@will.hunt)
Date: Tue, 20 Jan 2004 14:40:09 -0800
Subject: Installing SpamBayes
References: <400c399b_2@newsfeed.slurp.net>
	<up5r00hr648soiun3j6q326ga9n808hf17@4ax.com>
	<400c451a_1@newsfeed.slurp.net>
	<20040120135921.1C3F.JCARLSON@uci.edu>
Message-ID: <400c5790_1@newsfeed.slurp.net>

That didnt work either and the file assoc. are correct.

"Josiah Carlson" <jcarlson at uci.edu> wrote in message
news:20040120135921.1C3F.JCARLSON at uci.edu...
> > The instructions that came with SpamBayes says it.  THey say to either
run
> > the setup.py file in the Python GUI (IDLE) or froma command prompt.  I
have
> > tried both to no avail...
>
> If you are in windows and your associations are correct, try:
> setup.py install
>
>  - Josiah




From maketo at vinland.freeshell.org  Tue Jan 13 10:44:08 2004
From: maketo at vinland.freeshell.org (Ognen Duzlevski)
Date: Tue, 13 Jan 2004 15:44:08 +0000 (UTC)
Subject: Inlined C code and a TypeError
Message-ID: <bu13o8$ct4$1@chessie.cirr.com>

Hi all,

I have a nested loop that is written using PyInline for speed reasons. It modifies three matrices (lists of lists 
containing integer numbers).

Upon return from this function I run min() on values from the matrices. Below is the puzzling output:

--
time in nested loop: 0.250000
403
394
402
<type 'int'>
<type 'int'>
<type 'int'>
Traceback (most recent call last):
  File "./primegens_old.py", line 1656, in ?
    GetSegment()
  File "./primegens_old.py", line 1499, in GetSegment
    tmp_score,sim = SeqMapping(seq[ndx1],seq[0],seqmapping,inversemapping,length[ndx1],length[0])
  File "./primegens_old.py", line 678, in SeqMapping
    minscore = min(delmat[tlen][qlen], insertmat[tlen][qlen], scoremat[tlen][qlen])
TypeError: an integer is required
--

I do not understand - the numbers 403, 394 and 402 are results of printing the delmat, insertmat and 
scoremat[tlen][qlen] each. The "<type 'int'> is a result of calling type on each of these. Yet, when min is called, ot 
dies with the TypeError. Can anyone shed some light on this?

Thank you,
Ognen


From swalters_usenet at yahoo.com  Thu Jan  8 20:05:33 2004
From: swalters_usenet at yahoo.com (Samuel Walters)
Date: Fri, 09 Jan 2004 01:05:33 GMT
Subject: What psyco is goot at [Was: Rookie Speaks]
References: <mailman.203.1073609490.12720.python-list@python.org>
Message-ID: <pan.2004.01.09.01.04.16.992686@yahoo.com>

|Thus Spake Delaney, Timothy C (Timothy) On the now historical date of
Fri, 09 Jan 2004 11:51:23 +1100|
> Anyway, when the non-psyco code takes an hour, and the psyco.full()
> version takes 10 minutes, you know you're onto a winner :)
*chuckle*

That could be a good hint.

Sam Walters.

-- 
Never forget the halloween documents.
http://www.opensource.org/halloween/
""" Where will Microsoft try to drag you today?
    Do you really want to go there?"""



From guettli at thomas-guettler.de  Wed Jan 14 03:43:01 2004
From: guettli at thomas-guettler.de (Thomas Guettler)
Date: Wed, 14 Jan 2004 09:43:01 +0100
Subject: Inserting while itterating
Message-ID: <pan.2004.01.14.08.43.00.894047@thomas-guettler.de>

Hi,

Simple excerise:

You have a sorted list of integers:
l=[1, 2, 4, 7, 8, 12]

and you should fill all gaps:

result == [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]

How would you code this?

Constrain: The original list should be changed,
don't create a copy.

  thomas



From gerrit at nl.linux.org  Thu Jan 15 11:28:33 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Thu, 15 Jan 2004 17:28:33 +0100
Subject: [HUMOUR] indoctrination starts at an early age
Message-ID: <20040115162833.GA4748@nl.linux.org>

Hi,

1 November 1985, indoctrination does start at an early age indeed:

http://people.nl.linux.org/~gerrit/basic1.png
http://people.nl.linux.org/~gerrit/basic2.png

Broadcasted in a yearly children's program, in a song. Accompying text: 
BIEP BIEP TUUT TUUT
BIEP BIEP TUUT TUUT
BIEP
GO TO
FOR I IS ONE TO HUNDRED
PRINT
GO TO
FOUR
IF NOT
FIFTEEN
NEXT
GET A

translation: s/BIEP/BEEP/g
 text: http://www.omroep.nl/vara/tv/kvk/songteksten/album06/papa_papa.html
music: http://home.student.utwente.nl/g.holl/papa%20papa.mp3

:)

yours,
Gerrit.

-- 
214. If this maid-servant die, he shall pay one-third of a mina.
          -- 1780 BC, Hammurabi, Code of Law
-- 
PrePEP: Builtin path type
    http://people.nl.linux.org/~gerrit/creaties/path/pep-xxxx.html
Asperger's Syndrome - a personal approach:
	http://people.nl.linux.org/~gerrit/english/



From swalters_usenet at yahoo.com  Thu Jan 15 20:23:20 2004
From: swalters_usenet at yahoo.com (Samuel Walters)
Date: Fri, 16 Jan 2004 01:23:20 GMT
Subject: Printing to console (No Scroll)
References: <mailman.365.1074103229.12720.python-list@python.org>
	<pan.2004.01.15.05.28.44.882867@yahoo.com>
	<cvrid1-j74.ln1@beastie.ix.netcom.com>
Message-ID: <pan.2004.01.16.01.21.52.563757@yahoo.com>

| Dennis Lee Bieber said |
>         Don't you need a \r on the second print line also? Otherwise the
> spaces will be printed at the end of the previous counter value?

Um, yeah.  You do.

> 
> 
>         Though would \r even work if this was to be run on a Mac -- I
>         thought
> Macs used to use \r for line ending (maybe OS-X has gone to \n).

I don't know.  I've never owned a mac, and haven't ever worked on one.
Thus, mac nuances rarely enter my mind even when I know about them.

Sam Walters.

-- 
Never forget the halloween documents.
http://www.opensource.org/halloween/
""" Where will Microsoft try to drag you today?
    Do you really want to go there?"""



From stephan.diehlNOSPAM at gmx.net  Wed Jan 14 09:43:18 2004
From: stephan.diehlNOSPAM at gmx.net (Stephan Diehl)
Date: Wed, 14 Jan 2004 15:43:18 +0100
Subject: pulling set of unique values from a list
References: <400551c0$1@baen1673807.greenlnk.net>
Message-ID: <bu3kea$8uo$06$1@news.t-online.com>

Ben Davies wrote:

> I need to get [1,2,3] from [1,1,1,2,2,3,3] with as little effort possible
> for my CPU (and keyboard).
> I'd half expected there to be a list.values method to do this, but there
> isn't so I've have had to use a dictionary object:
>
 
I'd use a set for that:

>>> from sets import Set
>>> l = [1,1,1,2,2,3,3]
>>> [x for x in Set(l)]
[1, 2, 3]
>>>

By the way, in a lot of cases where I used lists, I'm now using sets because
they seem more natural in some situations.

Stephan


From irmen at -NOSPAM-REMOVETHIS-xs4all.nl  Sun Jan 25 11:45:29 2004
From: irmen at -NOSPAM-REMOVETHIS-xs4all.nl (Irmen de Jong)
Date: Sun, 25 Jan 2004 17:45:29 +0100
Subject: xrange not hashable - why not?
In-Reply-To: <z0SQb.100$qU3.34496@news20.bellglobal.com>
References: <mailman.764.1075042048.12720.python-list@python.org>
	<FSRQb.95$qU3.31981@news20.bellglobal.com>
	<z0SQb.100$qU3.34496@news20.bellglobal.com>
Message-ID: <4013f2a9$0$327$e4fe514c@news.xs4all.nl>

Sean Ross wrote:

>>xrange(100, sys.maxint),
>>since you have to walk through the items in that range to see if n is in
>>there, and that's a large range.
> 
> 
> Hmm, I don't think what I said there is correct, please disregard.


I think you're right though:

90000000 in xrange(1,sys.maxint)   takes a long time to complete....

--Irmen


From jensthiede at webgear.co.za  Fri Jan 23 13:45:51 2004
From: jensthiede at webgear.co.za (Jens Thiede)
Date: 23 Jan 2004 10:45:51 -0800
Subject: Distutils - Program Distribution
Message-ID: <dcde6f.0401231045.5311773f@posting.google.com>

Pardon the silly question, but can one use distutils to install
somewhere other than site-packages, or is distutils only ment for this
kind of a job. I'd like to use it to make the distribution of my
programs simpler :)

Thanks for any good replies,

Jens.


From francisgavila at yahoo.com  Mon Jan  5 16:42:33 2004
From: francisgavila at yahoo.com (Francis Avila)
Date: Mon, 5 Jan 2004 16:42:33 -0500
Subject: Problem: 'Threads' in Python?
References: <btcfjc$pgu$1@nets3.rz.RWTH-Aachen.DE>
Message-ID: <vvjmju4aflj591@corp.supernews.com>


Ralph Sluiters wrote in message ...
>Hi,
>i've got a small problem with my python-script. It is a cgi-script, which
is
>called regulary (e.g. every 5 minutes) and returns a xml-data-structure.
>This script calls a very slow function, with a duration of 10-40 seconds.
To
>avoid delays, i inserted a cache for the data. So, if the script is called,
>it returns the last caculated data-structure and then the function is
called
>again and the new data is stored in the cache. (There is no problem to use
>older but faster data)
>
>My problem is, that the client (A Java program (or browser, command line))
>waits, until the whole script has ended and so the cache is worthless. How
>can I tell the client/browser/... that after the last print line there is
no
>more data and it can proceed? Or how can I tell the python script, that
>everything after the return of the data (the retieval of the new data and
>the storage in a file) can be done in an other thread or in the background?

Wouldn't a better approach be to decouple the cache mechanism from the cgi
script?  Have a long-running Python process act as a memoizing cache and
delegate requests to the slow function.  The cgi scripts then connect to
this cache process (via your favorite IPC mechanism).  If the cache process
has a record of the call/request, it returns the previous value immediately,
and updates its cache in the meantime.  If it doesn't have a record, then it
blocks the cgi script until it gets a result.

How can threading help you if the cgi-process dies after each request unless
you store the value somewhere else?  And if you store the value somewhere,
why not have another process manage that storage?  If it's possible to
output a complete page before the cgi script terminates (I don't know if the
server blocks until the script terminates), then you could do the cache
updating afterwards.  In this case I guess you could use a pickled
dictionary or something as your cache, and you don't need a separate
process.  But even here you wouldn't necessarily use threads.

Threads are up there with regexps: powerful, but avoid as much as possible.
--
Francis Avila



From pod at internode.on.net  Sat Jan  3 19:51:19 2004
From: pod at internode.on.net (PoD)
Date: Sun, 04 Jan 2004 10:51:19 +1000
Subject: Speed?
References: <mailman.41.1073113311.12720.python-list@python.org>
Message-ID: <pan.2004.01.04.00.51.19.47767@internode.on.net>

On Fri, 02 Jan 2004 23:01:15 -0800, EP wrote:

> 
> On questions of the suitability of Python for CGI, embedded apps, etc., 

Most of the time taken by that test is outputting to the screen.
I tried you script in various environments

90x45 xterm     54.5 seconds
80x10 xterm     35.6
text console    26.2
minimised xterm 25.0

Run in Idle, the output goes to a TkInter text widget so I'm not surprised
it's so slow.



From wweston at att.net  Fri Jan 23 16:49:32 2004
From: wweston at att.net (wes weston)
Date: Fri, 23 Jan 2004 21:49:32 GMT
Subject: Various strings to dates.
In-Reply-To: <4GfQb.16187$AA6.14368@fed1read03>
References: <4GfQb.16187$AA6.14368@fed1read03>
Message-ID: <MFgQb.95539$6y6.1915432@bgtnsc05-news.ops.worldnet.att.net>

Amy,
    I hope there is a better way but, if you go here:

http://www.python.org/doc/current/lib/datetime-date.html

The new datetime module may help. This and the time mod
should get you where you want to go.

list     = strdate.split(", ")
daystr   = list[0]
daynum   = int(list[1])
monthstr = list[2]
year     = int(list[3])
#funct to get a month int is needed

d = datetime.Date(y,m,d)

wes

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

Amy G wrote:
> I have seen something about this beofore on this forum, but my google search
> didn't come up with the answer I am looking for.
> 
> I have a list of tuples.  Each tuple is in the following format:
> 
> ("data", "moredata", "evenmoredata", "date string")
> 
> The date string is my concern.  This is the date stamp from an email.
> The problem is that I have a whole bunch of variations when it comes to the
> format that the date string is in.  For example I could have the following
> two tuples:
> 
> ("data", "moredata", "evenmoredata", "Fri, 23 Jan 2004 00:06:15")
> ("data", "moredata", "evenmoredata", "Thursday, 22 January 2004 03:15:06")
> 
> I know there is some way to use the date string from each of these to get a
> date usable by python, but I cannot figure it out.
> I was trying to use time.strptime but have been unsuccesful thus far.
> 
> Any help is appreciated.
> 
> 



From corey.coughlin at attbi.com  Thu Jan 29 19:25:54 2004
From: corey.coughlin at attbi.com (Corey Coughlin)
Date: 29 Jan 2004 16:25:54 -0800
Subject: conditional expression sought
References: <pRbSb.330334$ts4.37644@pd7tw3no>
Message-ID: <a8623416.0401291625.594a9768@posting.google.com>

"Elaine Jackson" <elainejackson7355 at home.com> wrote in message news:<pRbSb.330334$ts4.37644 at pd7tw3no>...
> If bool(B_i)==True for 1<=i<=n and j is the smallest i with bool(A_j)==True,
> then the evaluation of (A_1 and B_1) or ... or (A_n and B_n) returns B_j without
> evaluating any other B_i. This is such a useful mode of expression that I would
> like to be able to use something similar even when there is an i with
> bool(B_i)==False. The only thing I can think of by myself is ( (A_1 and [B_1])
> or ... or (A_n and [B_n]) )[0], and I can't be satisfied with that for obvious
> reasons. Does anybody know a good way to express this? Any help will be mucho
> appreciado.
> 
> Peace

Oh, this must be part of your truth table script.  Interesting,
looking for something like a fast SOP evaluator, or more like a
function evaluation mechanism?  It would probably be most useful to
share your containers for A and B.  Are you really going to have
variables named A_1 to A_n, or will you just have a vector A[0:n]? 
The vector would probably be easier to deal with.  Using integer
representations for your boolean vectors is a good idea, and will
probably buy you enough speed that you won't need a more serious form
of short circuit evaluation, I imagine.  Unless your vectors are very
large indeed.  Hmm...


From cookedm+news at physics.mcmaster.ca  Thu Jan 15 20:15:11 2004
From: cookedm+news at physics.mcmaster.ca (David M. Cooke)
Date: Thu, 15 Jan 2004 20:15:11 -0500
Subject: Quick question.....
References: <mailman.370.1074115102.12720.python-list@python.org>
	<379178f1.0401151634.556bb405@posting.google.com>
Message-ID: <qnkad4ok82o.fsf@arbutus.physics.mcmaster.ca>

At some point, featherstone80 at hotmail.com (Narsil) wrote:

> I tried that.  I get the following error message
>
> Traceback (most recent call last):
>   File "E:\python\fun4b.py", line 80, in ?
>     menu()
>   File "E:\University\python\assign4b.py", line 49, in menu
>     print sum(weektotlist)
> NameError: global name 'sum' is not defined
>
> What did I do wrong?

'sum' as a builtin was introduced in python 2.3. You're using an older
version.

-- 
|>|\/|<
/--------------------------------------------------------------------------\
|David M. Cooke
|cookedm(at)physics(dot)mcmaster(dot)ca


From Tobias.Windeln at gmx.de  Fri Jan  9 08:33:59 2004
From: Tobias.Windeln at gmx.de (Tobias Windeln)
Date: Fri, 09 Jan 2004 14:33:59 +0100
Subject: Object-based inheritance in Python
In-Reply-To: <btm4mo$qpt$06$1@news.t-online.com>
References: <btm3u5$13so$1@f1node01.rhrz.uni-bonn.de>
	<btm4mo$qpt$06$1@news.t-online.com>
Message-ID: <btmak8$tka$1@f1node01.rhrz.uni-bonn.de>

Stephan Diehl wrote:
> Tobias Windeln wrote:
> 
> 
>>Hi!
>>
>>I'm looking for suggestions on object-based inheritance
>>in Python. Automatic forwarding (often called delegation)
>>in Python is easy:
>>
> 
> 
> Have a look at Hans Nowaks 'selfish' implementation:
> http://zephyrfalcon.org/download/selfish-0.4.2.zip

Thanks, this was exactly what I was looking for.



From skip at pobox.com  Wed Jan 28 10:05:56 2004
From: skip at pobox.com (Skip Montanaro)
Date: Wed, 28 Jan 2004 09:05:56 -0600
Subject: Distributing Python programs
In-Reply-To: <4017abb7$0$9394$ed9e5944@reading.news.pipex.net>
References: <4017abb7$0$9394$ed9e5944@reading.news.pipex.net>
Message-ID: <16407.53204.465653.73259@montanaro.dyndns.org>


    Graham> Can I install Python on a networked server and have any user run
    Graham> Python programs without having to go through the 9Mb client
    Graham> install?

Are you talking about Windows?  I think that as long as you copy
Python23.dll to the same directory as python.exe you will be okay.  For
Unix-y systems as long as everyone is on the same architecture you should be
okay.

    Graham> What are my options for distributing Python programs to my users?

Distutils is probably the way to go assuming they already have access to
Python proper.  Check the distutils docs:

    http://www.python.org/doc/current/lib/module-distutils.html

Otherwise, take a look at py2exe (Windows only) or Gordon MacMillan's
installer (cross-platform?).

Skip



From zunbeltz at wm.lc.ehu.es.XXX  Tue Jan 27 02:24:35 2004
From: zunbeltz at wm.lc.ehu.es.XXX (Zunbeltz Izaola)
Date: 27 Jan 2004 08:24:35 +0100
Subject: unittest
References: <cthu12j9id5.fsf@lcpxdf.wm.lc.ehu.es>
	<mailman.797.1075127834.12720.python-list@python.org>
	<cthoesqage6.fsf@lcpxdf.wm.lc.ehu.es>
	<mailman.801.1075133923.12720.python-list@python.org>
Message-ID: <cthk73dam6k.fsf@lcpxdf.wm.lc.ehu.es>

David Goodger <goodger at python.org> writes:

> Zunbeltz Izaola wrote:
>  > Tnaks, why is this so?
> 
>  From the fine manual
> (http://www.python.org/doc/current/lib/minimal-example.html):
> 
>      A testcase is created by subclassing unittest.TestCase. The three
>      individual tests are defined with methods whose names start with
>      the letters "test". This naming convention informs the test runner
>      about which methods represent tests.

I have to read the manuals at full :-)

Zunbeltz

> 
> The convention is necessary because you might want methods that are
> *not* tests.
> 
> -- David Goodger


From francisgavila at yahoo.com  Fri Jan 16 09:03:06 2004
From: francisgavila at yahoo.com (Francis Avila)
Date: Fri, 16 Jan 2004 09:03:06 -0500
Subject: do loop
References: <3064b51d.0401160536.5d80fa97@posting.google.com>
Message-ID: <100frr2i3ulhf3d@corp.supernews.com>

beliavsky at aol.com wrote in message
<3064b51d.0401160536.5d80fa97 at posting.google.com>...
>In a Python 'for' loop, one can change the value of looping variable,
>so that
>
>for i in range(3):
>    i = i*5
>    print i
>
>is legal code
>
...
>Is there a way to write a loop in Python that enforces this
>constraint? Should such functionality be added to the language?

Note: I haven't done a search of the archives for possible past discussions
of this, which I really should do before responding.

First, I think this is simply not a problem in practice.  Even much more
common errors, such as binding to a misspelled attribute name, are not
checked for.  Python leans very heavily on regression testing, even as a
design methodology, and thus is unconcerned with having these sort of
bondage-and-discipline language features.

Second, PyChecker (which is a static code checker, providing many of the
kinds of checks that people from staticly-typed languages tend to miss)
could probably easily be extended to check for this sort of behavior, if it
doesn't already have it.

Finally, Fortran is often subject to very agressive optimization by the
compiler.  Python optimization, by comparison, is pretty rudamentary (and
there wouldn't be any speed advantage in this case, anyway, given the
bytecodes Python uses).  Thus there may be a very significant incentive for
Fortran to disallow assignment to loop variables, whereas Python has no such
incentive.

--
Francis Avila



From jjhuang at cm.nctu.edu.tw  Tue Jan  6 10:26:14 2004
From: jjhuang at cm.nctu.edu.tw (Chun-Chieh Huang)
Date: Tue, 06 Jan 2004 23:26:14 +0800
Subject: Embedding python problem, related to PyObject_Print.
References: <m27k05ix5i.fsf@cm.nctu.edu.tw>
Message-ID: <m2llol3xpl.fsf@cm.nctu.edu.tw>

Chun-Chieh Huang <jjhuang at cm.nctu.edu.tw> writes:

> Dear all,
>
> I carefully lookup PyObject_Print in the API manual, but I can't find
> the resolution. And the problem is described below:
>
> I embed python into C++ code as follows:

Sorry I didn't specify the platform. Below is my python version and
platform, but I use g++-2.96 to compile the C++ code, which embeds
python. Is it a problem of different compiler versions?

Python 2.3.3 (#1, Jan  5 2004, 14:18:28) 
[GCC 3.3.1 (Mandrake Linux 9.2 3.3.1-2mdk)] on linux2
-- 
Chun-Chieh Huang, aka Albert    E-mail: jjhuang AT cm.nctu.edu.tw
???                         
Department of Computer Science  
National Tsing Hua University   MIME/ASCII/PDF/PostScript are welcome!
HsinChu, Taiwan                 NO MS WORD DOC FILE, PLEASE!


From mirko-lists at zeibig.net  Mon Jan 19 05:20:52 2004
From: mirko-lists at zeibig.net (Mirko Zeibig)
Date: Mon, 19 Jan 2004 11:20:52 +0100
Subject: C++ bad-mouthing
In-Reply-To: <y_VNb.70561$5V2.74207@attbi_s53>
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<7xisjh1e3i.fsf@ruckus.brouhaha.com>
	<10064loqc7sd7e3@corp.supernews.com>
	<dc6f5c99.0401130239.56f9ae36@posting.google.com>
	<3064b51d.0401160539.49fc5893@posting.google.com>
	<y_VNb.70561$5V2.74207@attbi_s53>
Message-ID: <bugb2d$hhnlu$1@ID-198792.news.uni-berlin.de>

Rainer Deyke said the following on 01/16/2004 07:23 PM:
> beliavsky at aol.com wrote:
> 
>>What is so dangerous about the STL in C++?
> 
> 
> One thing is that iterators can get invalidated when the container is
> modified.

Hm, I think there are similar problems in Python:
--- snip ---
adict = {'foo': 'bar', 'spam': 'ham'}

for key in adict: # has to be adict.keys()
   del adict[key]
--- snap ---

This snippet leads to a RuntimeError but the first item will be gone.

Of course, you may use the "older" syntax in this case. ".keys()" will 
generate the list of keys once in advance, while the upper example will 
call next() each time AFAIK.

Regards
Mirko
-- 


From http  Thu Jan  8 18:31:46 2004
From: http (Paul Rubin)
Date: 08 Jan 2004 15:31:46 -0800
Subject: count objects in a list and random numb gen
References: <btkodt$hrg$1@solaris.cc.vt.edu>
Message-ID: <7xekuaxbj1.fsf@ruckus.brouhaha.com>

Bart Nessux <bart_nessux at hotmail.com> writes:
> New to Python... trying to figure out how to count the objects in a
> list and then map the count to the objects or convert the list to a
> dict... I think the latter would be better as I need a number
> associated with each entry. Any pointers?

I'm sorry but I just can't understand the above description.  To count
the objects in a list L, use len(L).  To find the k'th element of L,
list, use L[k].  

> Also, does this bit of code look to be truely random?
> 
> def random_number_gen():
>     winner = []	
>     winner.append(random.sample(xrange(100000), 1))	
>     print winner	

If you want to choose one random winner out of a list, you can say
print random.randint(100000).  

Note that Python's random function doesn't try to be really seriously
random, but only to have reasonable statistical properties.  If you
need random numbers that can stand up to an adversary (e.g. you're
using it in an online game where the winners get substantial prizes),
you shouldn't generate them with the random module.


From dk123456789 at hotmail.com  Fri Jan  2 19:51:04 2004
From: dk123456789 at hotmail.com (Dave K)
Date: Sat, 03 Jan 2004 01:51:04 +0100
Subject: Can this be reversed (Tkinter)?
References: <mailman.30.1073076631.12720.python-list@python.org>
Message-ID: <qb4cvvom84cbknnc09f7d6drqo0thjmtsp@4ax.com>

On Fri, 2 Jan 2004 12:49:08 -0800 in comp.lang.python, "mark"
<mark at diversiform.com> wrote:

>I am looking at the format used by root.geometry().  The string returned
>from root.geometry() is "%dx%d+%d+%d".  Is there a quick and painless
>way to extract the values from that string (i.e., "100x150+25+25" =>
>(100,150,25,25))?
> 
>- Mark

For that particular string, I can think of 2 one-liners:

>>> s='100x150+25+25'
>>> print tuple([int(x) for x in s.replace('x', '+').split('+')])
(100, 150, 25, 25)
>>> print tuple([int(x) for y in s.split('x') for x in y.split('+')])
(100, 150, 25, 25)


For more general use, the regular expression "\d+" will match positive
integers:

>>> s='100x150+25+25/(34*7);12-34*(56%78/9)'
>>> import re
>>> print tuple([int(x) for x in re.findall('\d+', s)])
(100, 150, 25, 25, 34, 7, 12, 34, 56, 78, 9)

Dave


From __peter__ at web.de  Mon Jan 12 05:20:35 2004
From: __peter__ at web.de (Peter Otten)
Date: Mon, 12 Jan 2004 11:20:35 +0100
Subject: building strings with variable input
References: <pduMb.6321$g4.137247@news2.nokia.com>
Message-ID: <btts6h$kit$06$1@news.t-online.com>

Olaf Meyer wrote:

> Sometimes if find it clumsy unsing the following approach building
> strings:
> 
> cmd = "%s -start %s -end %s -dir %s" % (executable, startTime, endTime,
> directory)
> 
> Especially if you have a lot of variable input it makes it hard to match
> the variables to the proper fields. From other scripting languanges I'm
> used to something like:
> 
>   $cmd = "$executable -start $startTime -end $endTime -dir $directory"
> 
> This makes it very easy to see how the string is actually built. You
> dont't have to worry where which variables go.
> 
> Is there a similar way to do this in python?

>>> "from %(org)s to %(dest)s" % dict(org="X", dest="Y")
'from X to Y'

or even

>>> org = "A"
>>> dest = "B"
>>> "from %(org)s to %(dest)s" % locals()
'from A to B'

Peter


From aahz at pythoncraft.com  Sat Jan 17 11:00:26 2004
From: aahz at pythoncraft.com (Aahz)
Date: 17 Jan 2004 11:00:26 -0500
Subject: Does anyone else not find the fun in programming...?
References: <d232c5e.0401130823.27fd26ff@posting.google.com>
Message-ID: <bubm6q$7ei$1@panix3.panix.com>

In article <d232c5e.0401130823.27fd26ff at posting.google.com>,
Chris Lyon <chris.lyon at spritenote.co.uk> wrote:
>
>I find python very effective as a language and can generally project
>most of my hazy thoughts into it. But FUN !!! This is work dammit,
>I have now ground my teeth down from the number of times I read that
>programming is fun. Football (association) is fun, walking along
>canals is fun, Arguing about quite how useless the British Government
>is fun but programming  ?

When I learned Python, I'd been programming for more than twenty years,
but I didn't call myself a programmer because I hated programming.  I
still don't think that programming is fun, but Python is enough fun for
me to call myself a programmer.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

A: No.
Q: Is top-posting okay?


From na  Mon Jan  5 18:33:27 2004
From: na (Andrew)
Date: Mon, 5 Jan 2004 15:33:27 -0800
Subject: Need Help Optomizing Code
Message-ID: <vvh8oofr00oi35@corp.supernews.com>

Hi I am fairly new to python

and was wondering if anyone out there could help me optomize this code.

It is a simple Tkinter program that connects to a database and deletes
records

Some of this code was borrowed from a book learning python

Anyhelp would be cool thank you in advance

Andrew

"""""Below is the code"""""

import MySQLdb
from Tkinter import *

class FormEditor:

    def __init__(self):


        self.row = 0
        self.current = None

        self.root = root = Tk()
        root.minsize(300, 200)


        root.rowconfigure(0, weight=1)
        root.columnconfigure(0, weight=1)
        root.columnconfigure(1, weight=2)


        Label(root, text='Form Editor App', font='bold').grid(columnspan=2)
        self.row = self.row + 1
        self.listbox = Listbox(root, selectmode=SINGLE)
        self.listbox.grid(columnspan=2, sticky=E+W+N+S)
        self.listbox.bind('<ButtonRelease>')
        self.row = self.row + 1

        self.add_button(self.root, self.row, 0, 'Delete Entry',
self.delentry)
        self.add_button(self.root, self.row, 1, 'Reload', self.load_data)

        self.load_data()


    def add_button(self, root, row, column, text, command):
        button = Button(root, text=text, command=command)
        button.grid(row=row, column=column, sticky=E+W, padx=5, pady=5)

    def load_data(self):
        self.db = MySQLdb.connect("localhost", "", "", "guestbook")
        self.c = self.db.cursor()
        self.c.execute("select * from guests;")
        self.results = self.c.fetchall()
        self.listbox.delete(0, END)
        for item in self.results:
            self.listbox.insert(END, item)

    def delentry(self):
        self.db = MySQLdb.connect("localhost", "", "", "guestbook")
        self.c = self.db.cursor()
        self.c.execute("DELETE FROM guests WHERE id LIMIT 1;")
        self.results = self.c.fetchall()
        print "Please press reload to see your results"


app = FormEditor()
app.mainloop()




From stephendotboulet at motorola_._com  Mon Jan 26 15:47:16 2004
From: stephendotboulet at motorola_._com (Stephen Boulet)
Date: Mon, 26 Jan 2004 14:47:16 -0600
Subject: Single and double asterisks preceding variables in function
	arguments
In-Reply-To: <bv3gdg$ms0sn$1@ID-217427.news.uni-berlin.de>
References: <bv3d4e$1h7$1@newshost.mot.com>
	<bv3gdg$ms0sn$1@ID-217427.news.uni-berlin.de>
Message-ID: <bv3uft$r2d$1@newshost.mot.com>

anton muhin wrote:

> Stephen Boulet wrote:
> 
>> I've run across code like "myfunction(x, *someargs, **someotherargs)", 
>> but haven't seen documentation for this.
>>
>> Can someone fill me in on what the leading * and ** do? Thanks.
>>
>> Stephen
> 
> 
> See item 7.5 in Language Reference. In short: * declaries list of 
> additional parameters, while ** declares map of additional parameters. 
> Try somehting like:
> 
>     def foo(*params): print params
> 
> and
> 
>     def bar(**params): print params
> 
> to find out details.
> 
> regards,
> anton.

<<
a={'c1':'red','c2':'blue','c3':'fusia'}
def bar(**params):
....for k in params.keys():
........print k, params[k]
bar(a)
Traceback (most recent call last):
   File "<input>", line 1, in ?
TypeError: bar() takes exactly 0 arguments (1 given)
 >>

Why does bar take zero arguments?

Hmm, but:

<<
def bar2(*params,**moreparams):
....print "params are ", params,'\n'
....for k in moreparams.keys():
........print k, moreparams[k]
....print "moreparams are ", moreparams

bar2(range(3),a,)
params are  ([0, 1, 2], {'c3': 'fusia', 'c2': 'blue', 'c1': 'red'})

moreparams are  {}
 >>

I think I've got the *params argument down (you just get the whole 
argument list), but I'm still not getting the **moreparams ...

Stephen


From jjl at pobox.com  Mon Jan 19 08:21:15 2004
From: jjl at pobox.com (John J. Lee)
Date: 19 Jan 2004 13:21:15 +0000
Subject: New to Python: my impression v. Perl/Ruby
References: <mailman.493.1074484056.12720.python-list@python.org>
Message-ID: <87ad4kxees.fsf@pobox.com>

Wayne Folta <wfolta at netmail.to> writes:
[...]
> So I decided this might be a nice exercise to try Python. And it went
> together very quickly using Python's POP3 package. Then I decided to
> try it in Ruby. I think one little portion of the code shows the
> difference between the two cultures.
> 
> The problem is that the message is not properly terminated, so you
> need to time out and catch that timeout to realize, "hmmm, malformed".
> In Python I had:
> 
> M = poplib.POP3 ('172.16.30.1') ;
> M.user ('foo') ;
> M.pass_ ('bar')
> 
> num_mesgs = len (M.list ()[1])
> bad_mesgs = 0
> 
> for msg in range (num_mesgs):
> 	try:
> 		M.retr (msg + 1)
> ... blah blah...
> 
> How do I get it to time out after 5 seconds and how do I catch that?
> The online docs are pretty good, but I had to guess that POP3 was
> built on the socket package. Looking at socket's docs I found the

Well, that's not exactly a huge leap given any knowledge of how the
internet works.  I'm not sure that Python's docs should be in the
business of educating people about that...


> proper command and exception. I had to include:
> 
> socket.setdefaulttimeout (5.0)
> 
> before the POP3 commands to set the default socket timeout to 5
> seconds. And
> 
> except socket.timeout:
> 
> is the proper way to catch the timeout. Both of these things are in
> the socket documentation.

...but the fact that there is no timeout support in client modules of
the socket module is a known bug:

http://www.python.org/peps/pep-0042.html
http://www.python.org/sf/723287

It's likely to be fixed in 2.4.  Timeouts on sockets were only
introduced in Python 2.3 (though there was a third party library
around for a long time before that that retrofitted timeouts into
the standard library).


> Contrast this with Ruby. The Ruby docs are less complete, but they did
> mention that POP was subclassed from protocol and you'd have to look
> at protocol's source to see how it works. Looking through protocol, I
> figured out what to do and it was more elegant.

Well, if Python's standard library had decided to subclass everything
from some 'protocol' base class, the docs would indeed mention that
fact, since that's would be a fact about the Python standard library
rather than about networking in general.  It didn't, so it doesn't.


> The protocol class had a read_timeout, but since Ruby's mantra might
> be said to be "Real OO", the POP code had been written such that you
[...]

In the absence of some explanation of what you mean by "Real OO", that
sounds trollish.

I don't see how a missing feature in Python reveals any difference in
culture between Python and Ruby, other than perhaps that the Ruby
people like implementation inheritance more than the people who
designed the Python standard library.


John


From mwh at python.net  Mon Jan 19 06:07:30 2004
From: mwh at python.net (Michael Hudson)
Date: Mon, 19 Jan 2004 11:07:30 GMT
Subject: viewcvs install error on solaris
References: <4007e92d$0$325$ba620e4c@news.skynet.be>
Message-ID: <m3r7xw6vtg.fsf@pc150.maths.bris.ac.uk>

bva <not at existing.ru> writes:

> Hello,
> 
> While trying to install viewcvs on a solaris 5.9 machine I get the
> following error message:
> 
> Traceback (most recent call last):
>    File "./viewcvs-install", line 35, in ?
>      import compat
>    File "./lib/compat.py", line 20, in ?
>      import urllib
>    File "/usr/local/lib/python2.2/urllib.py", line 26, in ?
>      import socket
>    File "/usr/local/lib/python2.2/socket.py", line 41, in ?
>      from _socket import *
> ImportError: No module named _socket
> 
> Python is installed on the machine.  Can anybody tell me what I'm
> doing wrong or what I've forgotten?

Your python install lacks the socket module.  On Solaris this usually
means something exciting to do with your SSL install.  Who installed
Python?  Complain at them.

Cheers,
mwh

-- 
  In many ways, it's a dull language, borrowing solid old concepts
  from many other languages & styles:  boring syntax, unsurprising
  semantics, few  automatic coercions, etc etc.  But that's one of
  the things I like about it.                 -- Tim Peters, 16 Sep 93


From klappnase at web.de  Wed Jan 21 12:14:51 2004
From: klappnase at web.de (klappnase)
Date: 21 Jan 2004 09:14:51 -0800
Subject: Tkinter bitmap bug ?
Message-ID: <a7a67196.0401210914.1c227978@posting.google.com>

Hello everyone,

I have seen several threads here on this problem, but still cannot figure out
the solution. I want to create a window icon for a Tkinter application and tried
several things that are supposed to work. Here is a little demo of what I tried:

#################################from Tkinter import *

icon1 = ('''#define im_width 26
#define im_height 25
static char im_bits[] = {
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x70,0x00,0x00,0x00,0x7e,
0x00,0x00,0xe0,0x7f,0x00,0x00,0xff,0x63,0x00,0x00,0x3f,0x70,0x00,0x00,0x03,
0x7e,0x00,0x00,0xe3,0x7f,0x00,0x00,0xff,0x63,0x00,0x00,0x3f,0x60,0x00,0x00,
0x03,0x60,0x00,0x00,0x03,0x60,0x00,0x00,0x03,0x78,0x00,0x00,0x03,0x7c,0x00,
0x00,0x03,0x7e,0x00,0xc0,0x03,0x7e,0x00,0xe0,0x03,0x3c,0x00,0xf0,0x03,0x18,
0x00,0xf0,0x03,0x00,0x00,0xe0,0x01,0x00,0x00,0xc0,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 };''')

icon2 = ('R0lGODlhEAAMAKEAAAAAAAC18////////yH5BAEAAAIALAAAAAAQAAwAAAI'
        'glIFgyxcfVFsAQtmS3rjaH1Hg141WaT5ouprt2HHcUgAAOw==')

def test0():
    root = Tk()
    root.iconbitmap('@/somepath/window_icon.xbm')
    root.mainloop()

def test1():
    root = Tk()
    root.bit = BitmapImage(data=icon1)
    root.iconbitmap(root.bit)
    root.mainloop()

def test2():
    root = Tk()
    bit = BitmapImage(data=icon1)
    img = PhotoImage(data=icon2)
    try:
        b1 = Button(root, bitmap=bit)
        b1.icon_ref = bit
        b1.pack()
    except:
        pass
    try:
        b2 = Button(root, image=img)
        b2.icon_ref = img
        b2.pack()
    except:
        pass
    root.mainloop()

def test3():
    root = Tk()
    img = PhotoImage(data=icon2)
    top = Toplevel(root)
    l = Label(top, image=img)
    l.icon_ref = img
    l.pack()
    root.iconwindow(top)
    root.mainloop()

if __name__=='__main__':
    test0()
   
#############################################

Running the test0() function works fine, however I wanted to not to carry an
external bitmap file around, so I tried to pass the bitmap data to a BitmapImage
object.
Running test1() returns following error message:

Traceback (most recent call last):
  File "/usr/local/share/test.py", line 52, in ?
    test1()
  File "/usr/local/share/test.py", line 20, in test1
    root.iconbitmap(root.bit)
  File "/usr/lib/python2.3/lib-tk/Tkinter.py", line 1448, in wm_iconbitmap
    return self.tk.call('wm', 'iconbitmap', self._w, bitmap)
_tkinter.TclError: bitmap "pyimage1" not defined

No surprise - the image gets garbage collected as soon as it is created, I know.
So I tried test2() to avoid this. Unfortunately it is quite the same here,
and this is the point where it begins to look like a bug to me. Running test2()
returns a window with only one button with the PhotoImage correctly displayed.
Obviously the PhotoImage does not get garbage collected, so why does the 
BitmapImage ???

I thought then if this all would not work I might use a PhotoImage as window
icon using the iconwindow() method - see test3().
However the icon does not show up.

Any help on this would be greatly appreciated.

Thanks in advance

Michael


From CGStartup at earthlink.net  Sat Jan 31 20:02:47 2004
From: CGStartup at earthlink.net (Stan Schwartz)
Date: 31 Jan 2004 17:02:47 -0800
Subject: Programmers Wanted for Computer Graphics Startup Near
	Philadelphia
References: <2da21d6c.0401310807.671be3b7@posting.google.com>
	<bvh1eq$jjr$1@namru.matavnet.hu>
Message-ID: <2da21d6c.0401311702.1fd5c019@posting.google.com>

"Mikl?s" <nospam at nowhere.hu> wrote in message news:<bvh1eq$jjr$1 at namru.matavnet.hu>...
> Software patents are evil.
> Hell to them.

At one point I would have agreed with you, and I
agree that a fair number of software patents unfairly
take credit for work that was already in the public
domain.  Do you think patents are ever justified?
Stan


From aahz at pythoncraft.com  Wed Jan 14 14:24:13 2004
From: aahz at pythoncraft.com (Aahz)
Date: 14 Jan 2004 14:24:13 -0500
Subject: Myth or Urban Legend? Python => Google [ was: Why learn Python
	??]
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<bu0v9v$c6nr4$1@ID-46268.news.uni-berlin.de>
	<mailman.343.1074047955.12720.python-list@python.org>
	<1009fum3evnc96a@corp.supernews.com>
Message-ID: <bu450t$fg0$1@panix3.panix.com>

In article <1009fum3evnc96a at corp.supernews.com>,
Francis Avila <francisgavila at yahoo.com> wrote:
>EP wrote in message ...
>>
>>Is it true that the original Google spider was written in Python?
>
>I don't know *what* Google uses Python for, but it uses Python.

How about http://www.python.org/Jobs.html
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

A: No.
Q: Is top-posting okay?


From ark at acm.org  Mon Jan 26 10:57:31 2004
From: ark at acm.org (Andrew Koenig)
Date: Mon, 26 Jan 2004 15:57:31 GMT
Subject: I support PEP 326
References: <mailman.654.1074788734.12720.python-list@python.org>	<401081A1.E4C34F00@alcyone.com>	<roy-1E6566.21133122012004@reader2.panix.com><hH2Qb.91181$6y6.1837343@bgtnsc05-news.ops.worldnet.att.net>
	<mailman.675.1074841738.12720.python-list@python.org>
Message-ID: <LNaRb.19492$6O4.521314@bgtnsc04-news.ops.worldnet.att.net>

> Calling min with no arguments need not be the same as calling it with an
> empty sequence argument. That is not necessarily an argument for making
> the empty function call return something arguably strange...

Having min() and min([]) return different values is also arguably strange.




From jcarlson at uci.edu  Wed Jan 21 16:49:21 2004
From: jcarlson at uci.edu (Josiah Carlson)
Date: Wed, 21 Jan 2004 13:49:21 -0800
Subject: newbie: "File Buffered" Text widget
References: <Y9yPb.14810$U77.1010689@news20.bellglobal.com>
Message-ID: <20040121134515.D8EC.JCARLSON@uci.edu>

> I need a "File Buffered" Text widget (in Tkinter), that
> is a window over a buffered text file which would behave
> as if the entire file was loaded in memory (permitting
> the user to browse huge corpora text files).
> 
> Before writing one from scratch, I would like to be sure
> that there is no such thing available somewhere.

Creating your own read-only widget shouldn't be too difficult.  Creating
your own read-write widget would be a bit more difficult.  I would offer
to write a wxPython read-only one (it would take like 10 minutes), but
you're looking for Tkinter, so nevermind.

 - Josiah



From ldwhitley.remove.this at charter.net  Sat Jan  3 14:25:49 2004
From: ldwhitley.remove.this at charter.net (LD Whitley)
Date: Sat, 03 Jan 2004 13:25:49 -0600
Subject: Simulation library in Python
In-Reply-To: <mailman.33.1073079250.12720.python-list@python.org>
References: <mailman.33.1073079250.12720.python-list@python.org>
Message-ID: <vve5q36a4k5ef1@corp.supernews.com>

Samir Patel wrote:

> I am interested in creating a professional level
> simulation model in Python, so any help regarding this
> will be very much appriciated.


I think Simpy is about as close as you're going to come - it's the best 
I've seen in Python.  I haven't tracked it lately but if you send a note 
to the developers I think that you'll find they're still active.

Personally, I (and the group of which I'm a member) are doing our 
modeling in C++/CSim.  It's mostly a speed of simulation issue but I 
have to admit that I haven't done any comparisons between the C++/CSim 
and Simpy.  I'm just assuming that the compiled nature of C++ and the 
interpreted nature of Python will give the edge to C++. Our models can 
run for a long time so speed of execution is important.  If anyone has 
information to the contrary, I'm all ears.  (or eyeballs, or something)

Larry

-- 
LD Whitley
http://webpages.charter.net/ldwhitley



From rmkrauter at yahoo.com  Fri Jan 30 23:38:52 2004
From: rmkrauter at yahoo.com (Rich Krauter)
Date: Fri, 30 Jan 2004 23:38:52 -0500
Subject: timeit
In-Reply-To: <bvfa7b$6jc$1@newsg1.svr.pol.co.uk>
References: <bvfa7b$6jc$1@newsg1.svr.pol.co.uk>
Message-ID: <1075523932.4239.22.camel@vaio>

Did you try enclosing arg to Timer in quotes? It is enclosed in quotes
in the python tutorial:
http://www.python.org/doc/current/tut/node12.html#SECTION00121000000000000000000

Rich

On Fri, 2004-01-30 at 23:21, Duncan Smith wrote:
> This is possibly a stupid question, but I need to get this working quickly,
> and I guess I'm just too tired / pressured to see what I'm doing wrong.
> Clearly (from the output below) I can't pass the statement to an instance of
> timeit.Timer, but I can execute it using exec().  Any idea what I need to do
> to get this timed (using timeit).  Cheers.
> 
> >>> import SDC_table
> >>> import subtract
> >>> import timeit
> >>> t = SDC_table.RandomTable(1, 12, (2,3,4))
> >>> s = """\
> p = subtract.p_risk(t.values, 10)
> """
> >>> tim = timeit.Timer(stmt=s)
> >>> tim.timeit(10)
> 
> Traceback (most recent call last):
>   File "<pyshell#119>", line 1, in -toplevel-
>     tim.timeit(10)
>   File "C:\Python23\lib\timeit.py", line 158, in timeit
>     return self.inner(it, self.timer)
>   File "<timeit-src>", line 6, in inner
> NameError: global name 'subtract' is not defined
> 
> # yet
> >>> exec(s)
> >>> p
> 0.242621453769059
> 



From alan.gauld at btinternet.com  Thu Jan  1 17:34:12 2004
From: alan.gauld at btinternet.com (Alan Gauld)
Date: Thu, 01 Jan 2004 22:34:12 GMT
Subject: Test if IDLE is a mature program
References: <ppKdnTEKUp3Hr2-iRVn-jg@comcast.com>
	<7ti4vvoburp4k4o4a0v5p4shae7o5uhotb@4ax.com>
	<edqdnVxBL_Q3fG-iRVn-gg@comcast.com>
	<99dce321.0312311130.5b7c7c8a@posting.google.com>
	<N6OdndTvJqSstW6iRVn-gg@comcast.com>
Message-ID: <3ff49f0e.776954150@news.blueyonder.co.uk>

On Wed, 31 Dec 2003 14:48:59 -0500, "Aubrey Hutchison"
<abhjrpe at comcast.net> wrote:
> I understand the problem of using the names of common modules...
> 
> But why do we need to work around that problem..

For the same reason you have to do it in any development tool.
Name clashes are the programmers responsibility not the tool
makers, there is no sane way for a tool maker to avoid user
stupidity.

> My position still stands
> This program does not really provide a credit to PYYHON.

On your general point that IDLE is not a mature product you are
correct, it is only at version 1.0 with Python 2.3. Name me any
product (except maybe TeX) that was mature at version 1.0.
I remember using Visual Basic at v1.0 and it definitely wasn't
mature...

However your test of maturity is completely bogus, it is an issue
of user error not IDLE error. How do you think IDLE should handle
the case you describe? How would it know whether you intended a
name clash or not?

Alan G.
Author of the Learn to Program website
http://www.freenetpages.co.uk/hp/alan.gauld


From gerrit at nl.linux.org  Fri Jan  9 15:39:44 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Fri, 9 Jan 2004 21:39:44 +0100
Subject: PRE-PEP: new Path class
In-Reply-To: <3FFEFB7C.6030802@beyond-thoughts.com>
References: <vvivefh35qjv9a@news.supernews.com>
	<mailman.192.1073594032.12720.python-list@python.org>
	<3FFEFB7C.6030802@beyond-thoughts.com>
Message-ID: <20040109203944.GA5405@nl.linux.org>

Christoph Becker-Freyseng wrote:
> Gerrit Holl wrote:
> >John Roth wrote:
> >
> >>I'm adding a thread for comments on Gerrit Holl's pre-pep, which
> [...]
> >Shall I submit this as an official PEP? Or shall I first fill in more
> >open issues and perhaps give the possibility to change "closed" issues?
> >
> 
> I think there are still a lot of issues. I think letting settle things 
> down at first is wiser. And then present a PEP where many (even better 
> all) contributors agree. (I didn't like the result of PEP308 very much ...)

Yes. But of course, a PEP being an official PEP does not mean there
can't be any more changes to it. So the question is, at what point does
a pre-PEP become a PEP? Some PEPs have a $Revision: 1.20$, after all.

> In additions there are still good points in the older discussions and 
> existing modules that should be integrated (You linked in the prePEP).

Yes, that's true. I'll do that.

yours,
Gerrit.

-- 
49. If any one take money from a merchant, and give the merchant a
field tillable for corn or sesame and order him to plant corn or sesame in
the field, and to harvest the crop; if the cultivator plant corn or sesame
in the field, at the harvest the corn or sesame that is in the field shall
belong to the owner of the field and he shall pay corn as rent, for the
money he received from the merchant, and the livelihood of the cultivator
shall he give to the merchant.
          -- 1780 BC, Hammurabi, Code of Law
-- 
PrePEP: Builtin path type
    http://people.nl.linux.org/~gerrit/creaties/path/pep-xxxx.html
Asperger's Syndrome - a personal approach:
	http://people.nl.linux.org/~gerrit/english/



From none at none.com  Mon Jan 12 09:45:53 2004
From: none at none.com (Derek)
Date: Mon, 12 Jan 2004 09:45:53 -0500
Subject: Why learn Python ??
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<btubno$bd8k6$1@ID-46268.news.uni-berlin.de>
Message-ID: <btubv2$bhiu4$1@ID-46268.news.uni-berlin.de>

I guess I didn't really answer the main question: Why learn Python
over Perl, C/C++, C#, etc.

In short, because it's easier to program, isn't tied to a platform,
and has lots of high-level functionality right out of the box.




From newsgroups at jhrothjr.com  Sat Jan  3 18:55:11 2004
From: newsgroups at jhrothjr.com (John Roth)
Date: Sat, 3 Jan 2004 18:55:11 -0500
Subject: pickling lambdas?
References: <9abf3a27.0401031446.4d73cfb2@posting.google.com>
	<vvekdnhlk0mq35@news.supernews.com>
	<7x65fs38cg.fsf@ruckus.brouhaha.com>
Message-ID: <vvelkmgthali94@news.supernews.com>


"Paul Rubin" <http://phr.cx at NOSPAM.invalid> wrote in message
news:7x65fs38cg.fsf at ruckus.brouhaha.com...
> "John Roth" <newsgroups at jhrothjr.com> writes:
> > > however, upon google searching for "python lambda pickle" i find 2
> > > posts, one including gvr, which apparently demonstrate that this was
> > > being attempted and even suggest that it is feasible.  has this become
> > > available yet, or will it be soon?
> >
> > Why do you want to do this? According to the docs, all that
> > is saved for a function or a class is the name. Code, data and
> > so forth is not saved, so it makes no sense to try to pickle
> > a lambda unless you've bound it to a name at the module level.
>
> I think the idea may be to pickle a closure, to save the data inside
> it.  I do remember some mention about pickling generators.  Anyway, in
> Python 2.x the closest you can come to that is pickling class
> instances.

That ought to work as long as you unpickle it into the same module
so you can get the original class definition.

John Roth




From ian at ibygrave.no-ip.org  Mon Jan 12 15:33:31 2004
From: ian at ibygrave.no-ip.org (ian)
Date: Mon, 12 Jan 2004 20:33:31 +0000
Subject: Why learn Python ??
References: <40029dad$0$28706$a729d347@news.telepac.pt>
Message-ID: <pan.2004.01.12.20.33.31.104330@ibygrave.no-ip.org>

On Mon, 12 Jan 2004 13:05:19 +0000, Bicho Verde wrote:

>     And also I don't know exactly why would I learn Python rather than C#,
> C++ or Perl.

As usual, someone else already said it better than I can:

"Why Python?" by Eric S. Raymond
http://www.linuxjournal.com/article.php?sid=3882

--IAN



From gandalf at geochemsource.com  Thu Jan 29 17:32:45 2004
From: gandalf at geochemsource.com (Gandalf)
Date: Thu, 29 Jan 2004 23:32:45 +0100
Subject: wxNotebook question
Message-ID: <40198A0D.70704@geochemsource.com>

How can I hide/show a page (wxNotebookPage) invisible of a wx.wxNotebook 
instance?
There is a GetPage() method which returns a wxNotebookPage but I could 
not find
any documentation in the help about this class. I thought there will be 
a 'SetVisible'
or 'SetTabvisible' method but it seems to be a proxy for the root 
control on that page.
So I cannot even get method names by dir(self.notebook.GetPage(0)).

Thanks in advance





From jsbenson at bensonsystems.com  Thu Jan  8 22:54:12 2004
From: jsbenson at bensonsystems.com (John Benson)
Date: Thu, 8 Jan 2004 19:54:12 -0800
Subject: Lua: further investigation and comparisons with Python and Forth
Message-ID: <02ef01c3d664$3ead3c00$e50a500a@jsbwxp3>

Since I've seen some Forth expertise/interest in evidence here, so I'll
permit myself some observations on Lua/Python/Forth.

Lua's scripting command syntax is pretty simple, though different from
Python's. It is reference- and not variable-oriented (that is, "variables"
are merely holders for references, not values) and smacks of Python in this
regard. Functions are first-class objects; again, very similar to Python.

The big differences (for me) are two:

1) Lua is designed to be driven "from the outside" by an embedding host
program and needs to be extended via C to fulfill its stated purpose of
providing an embeddable, extendable scripting language, so the Lua C API is
much more important to me as a Lua programmer than the Python API has been
to me as a Python programmer.

2) The Lua API is stack-based, so your C extension code pushes, pops and
otherwise manipulates values on the Lua stack. These values aren't simple
processor scalars; you can push a table onto the stack, whose elements can
be tables containing tables and so on and so forth. Speaking of forth, the
Lua C API has very much the flavor of Forth on steroids. You play the same
kind of stack games, but the command prompt on the other side of Lua can be
used like an object-oriented scripting language.

One very cool aspect of Lua is that the entire state of a "Lua virtual
machine" is encapsulated in the "Lua state" data structure. This means no
hidden global variable sharing at the C language level, so you can easily
instantiate a new Lua "session" to handle each concurrent incoming socket
session in a server if you wish, and keep them all perfectly separate. To
me, that means that I can extend Lua with the appropriate C routines and
then script socket sessions in an object-oriented fashion without leaving
the comfort of my C compiler (old habits die hard). While this would be a
useless tour de force on the PC or Unix, it's actually very useful on my old
Tandem K100 4-CPU fault-tolerant system. The file system has only one level
of directory per disk volume (ack!) and so a port of Python or Java would
only be an exercise in masochism. Later Tandems sport a POSIX personality
(called OSS, or Open Systems Services), but my K100 dates from an earlier
time when mainframes still roamed the earth. Flattening the Lua source tree
to fit on the K100 wasn't too hard, and there isn't anything in Lua's
operation that requires directory nesting in the filesystem.

Aside:

It was kind of fun to draw on my previous experience with Forth in grokking
the Lua C API. For a real blast from the past, check out the Open Firmware
initiative, which has adopted Forth as the language of it's BIOS code
loader. In the future, you may be able to buy some hardware, talk to a
little Forth kernel in ROM somewhere, decide how to load a real machine
BIOS, and then set it going prior to the actual OS boot.

Before reading about Open Firmware, I had assumed that Forth had completely
dropped out of sight. Anyone else aware of counterexamples?






From adalke at mindspring.com  Mon Jan 12 01:35:13 2004
From: adalke at mindspring.com (Andrew Dalke)
Date: Mon, 12 Jan 2004 06:35:13 GMT
Subject: Simple Python Speed Benchmark
References: <n5k000ddhifqpemip0dedfsb9kkfjt0p5b@4ax.com>
Message-ID: <BerMb.5359$1e.4879@newsread2.news.pas.earthlink.net>

engsolnom at ipns.com:
> I was curious how long Python takes just to read and display time.clock()
  ...
> I was amazed at the difference in speed depending on when/how the clock
times were converted to
> milliseconds....almost 4 to 1...as indicated in the RESULTS below. I
understand the variation in the
> times is probably due to other running processes.
>
> Any explanation?

There are quite a few things here.

First, if you look at the "Test 3:" and "Test 4:" numbers you'll see it's
only
2 times slower, not 4.  Let's start with that case, where the tests you make
are in a function.  You can see the PVM op codes generated by using
the dis module

>>> def spam():
... t1 = time.clock()
...
>>> import dis
>>> dis.dis(spam)
  2           0 LOAD_GLOBAL              0 (time)
              3 LOAD_ATTR                1 (clock)
              6 CALL_FUNCTION            0
              9 STORE_FAST               0 (t1)
             12 LOAD_CONST               0 (None)
             15 RETURN_VALUE
>>> def spam2():
... t1 = time.clock() * 1000
...
>>> dis.dis(spam2)
  2           0 LOAD_GLOBAL              0 (time)
              3 LOAD_ATTR                1 (clock)
              6 CALL_FUNCTION            0
              9 LOAD_CONST               1 (1000)
             12 BINARY_MULTIPLY
             13 STORE_FAST               0 (t1)
             16 LOAD_CONST               0 (None)
             19 RETURN_VALUE
>>>

This shows that the "* 1000" is doing two more things; load the
constant "1000" and then do a binary multiply.  The obvious
conclusion is that the factor of 2 slowdown comes from this step.
(That actually surprises me.  Function call overhead should be
much more than a simple multiply.)

The next is the precision of the clock.  The numbers generated
are pretty well quantized.  For example, '0.014527' comes up
quite frequently as does '0.005867'.  It appears that your clock
has a resolution of about 0.0003, which is 5% of the smaller
numbers or 2% of the bigger ones.  If the time slices are just
at the wrong point then you may get a systematic error of up
to about 6% (ie, if the time.clock is done in just under an
integral time quantum while the time.clock()*1000 is just over
a quantum).

To get around that, you should do more tests, and not have
the results of one test strongly correlated with the other.
(You do because get_time_1() is always followed with a
get_time_2().)  The easiest way is to use the timeit module,
either on the command-line or interactively, as

>>> import timeit
>>> timeit.Timer("time.clock", "import time").repeat(3, 10000)
[0.0063276180834463958, 0.0066243037524600368, 0.0078663607060889262]
>>> timeit.Timer("time.clock()", "import time").repeat(3, 10000)
[0.054394886949353349, 0.053860182268920198, 0.05341180138486834]
>>> timeit.Timer("time.clock()*1000", "import time").repeat(3, 10000)
[0.057691115018485561, 0.059368981429486212, 0.058075800674146194]
>>>

As you can see, on my box it takes 0.06 microseconds to do
'time.clock', 0.48 microseconds to make the call, and 0.03
microseconds to do the *1000.

Try those on your machine.

                    Andrew
                    dalke at dalkescientific.com




From ville.vainio at spamster_tut_remove.fi  Mon Jan  5 02:34:14 2004
From: ville.vainio at spamster_tut_remove.fi (Ville Vainio)
Date: 05 Jan 2004 09:34:14 +0200
Subject: Cheetah best for templating?
References: <CMudnfQnOeIn1GqiRVn-uQ@comcast.com>
	<3FF74DFF.6BE7AC7D@alcyone.com>
Message-ID: <du7ekue4znt.fsf@lehtori.cc.tut.fi>

Erik Max Francis <max at alcyone.com> writes:

> I tend to think highly of EmPy, but that's not exactly a surprise :-):

<aol>Me too!</aol>

> 	http://www.alcyone.com/software/empy/
> 
> I do know that there are several people on the EmPy mailing list using
> EmPy for exactly the purpose you're considering.

Including yours truly. Also, the source code generation problem might
be solved trivially by checking out

http://www.students.tut.fi/~vainio24/pywiz/

> What's going to be best for you is really going to depend on your
> aesthetic sensibilities; pretty much all of templating systems' base
> features are universal, just expressed in different ways.  The only

Also, there is very little to lose by taking a cursory glance at each
one and choosing what seems easiest (assuming they have the same level
of power).

Short EmPy tutorial:

---------- myfile.em -------------------

@{
# statements
import time
var1 = 12
var2 = "Hello"
}

@var2 World! @var1 plus one is @(var1+1)
------------------------------------------

python em.py myfile.em > output.txt

-- 
Ville Vainio   http://www.students.tut.fi/~vainio24


From crap at crud.com  Sat Jan 10 04:36:06 2004
From: crap at crud.com (Moosebumps)
Date: Sat, 10 Jan 2004 09:36:06 GMT
Subject: Setting up test for XML-RPC
References: <cDPLb.2260$nl3.2178@newssvr29.news.prodigy.com>
Message-ID: <aIPLb.2261$oo3.640@newssvr29.news.prodigy.com>

OK, I tried the obvious and it worked.  : )  I just changed the call to
server.pow(3,5) and it returns the correct result.  I wonder why they aren't
set up that way in the first place.

But the second question still stands.  I am running both the client and
server on my own machine now (Windows 2000).  Would I just need Python and
web server if they were different machines?  I would like to avoid
installing a bunch of software on the 20 machines if possible.

thanks,
MB

"Moosebumps" <crap at crud.com> wrote in message
news:cDPLb.2260$nl3.2178 at newssvr29.news.prodigy.com...
> I'm trying to test out Python XML-RPC for the first time, and can't find
> anything that executes a call end to end.
>
> I thought that I would use SimpleXMLRPCServer to run a simple server on
> localhost, and xmlrpclib to run a client that connects to it, but they
don't
> seem to register the same functions.  The server test code registers 'pow'
> and 'add' (in the Python 2.3 distribution) but the client seems to call
> "print server.examples.getStateName(41)".  It doesn't seem like they were
> meant to work together as a unit test, although that would seem logical.
>
> Can anyone help me just get a single XML-RPC call to execute (and I want
to
> see both the client and server code)?  I have googled extensively and
> haven't come up with anything.
>
> Also -- I'm investigating this for a nightly build process involving many
> machines.  There is going to be a master machine that sends requests to 20
> other machines to build things.  They're just a bunch of Windows XP
> machines, with almost no software on them.  What software would I need to
> install to run XML-RPC servers on them to receive requests?  Just Python
and
> a web server like Apache?
>
> If there are any other _very_ lightweight RPC mechanisms, I would
appreciate
> hearing about them.  I am writing some build scripts in Python, and while
I
> could for example schedule a task on 20 machines separately, it would be
> nicer to have a master machine control when the build happened, etc. and
be
> able to manage dependencies by waiting for a return result, etc.  All I
want
> to do is execute a python function on a remote machine and get a result
> back.  It is all done in a local, secure environment.
>
> Thanks for all the previous responses to my questions -- this newsgroup
has
> been very helpful.
>
> MB
>
>




From sidharthk at hotmail.com  Thu Jan 29 13:59:35 2004
From: sidharthk at hotmail.com (Sidharth Kuruvila)
Date: Fri, 30 Jan 2004 00:29:35 +0530
Subject: read() on tempfile
References: <afc115ec.0401291041.155b51ee@posting.google.com>
Message-ID: <bvblfq$qobic$1@ID-223265.news.uni-berlin.de>


"cherico" <cherico at bonbon.net> wrote in message
news:afc115ec.0401291041.155b51ee at posting.google.com...
> from tempfile import *
>
> f = NamedTemporaryFile ()
> f = write ( 'test' )
> print f.read () #here print nothing
>
> why is it nothing to read()?
> I suppose f is of mode 'w+'

the rpoblem is probably that your file pointer is sitting at the end of the
file after you write something
try f.seek(0) before you read, might work





From aahz at pythoncraft.com  Mon Jan 19 14:52:17 2004
From: aahz at pythoncraft.com (Aahz)
Date: 19 Jan 2004 14:52:17 -0500
Subject: Delayed evaluation and setdefault()
References: <buh6j1$bub$1@news.tudelft.nl> <400C25FF.A76B1FEA@engcorp.com>
Message-ID: <buhchh$43f$1@panix1.panix.com>

In article <400C25FF.A76B1FEA at engcorp.com>,
Peter Hansen  <peter at engcorp.com> wrote:
>Leo Breebaart wrote:
>> 
>>    >>> d.setdefault('foo', b())
>> then b() *does* get executed regardless of whether or not the
>> value it returns is actually used ('foo' was not found) or not
>> ('foo' was found).
>> 
>> So I guess my question is twofold: one, do people think
>> differently, and if so why?; and two: is there any elegant (or
>> other) way in which I can achieve the delayed evaluation I desire
>> for setdefault, given a side-effect-having b()?
>
>def lazysetdefault(dict, key, ref):
>    if not dict.has_key(key):
>        dict[key] = ref()
>    return dict[key]

First of all, Peter made a boo-boo in naming a parameter ``dict``.

If the key will be in the dict more than 90% (*very* roughly) of the time
you call this, you can do this instead:

def lazysetdefault(d, key, ref):
    try:
        return d[key]
    except KeyError:
        d[key] = ref()
        return d[key]

That minimizes the bytecode and function calls.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

A: No.
Q: Is top-posting okay?


From premshree_python at yahoo.co.in  Tue Jan 27 23:17:03 2004
From: premshree_python at yahoo.co.in (=?iso-8859-1?q?Premshree=20Pillai?=)
Date: Wed, 28 Jan 2004 04:17:03 +0000 (GMT)
Subject: Manipulating MIDI
Message-ID: <20040128041703.13351.qmail@web8304.mail.in.yahoo.com>

Hello,

I am in need of a module using which I could
manipulate musical information from MIDI files. What I
need is some module that could extract the frequency
components of the various instruments in the musical
piece. Any suggestions?

If there isn't such a module, could you suggest a
similar module in C/C++, so that I could then write
bindings for it in Python.

-Premshree Pillai
[http://www.qiksearch.com/]

=====
-Premshree
[http://www.qiksearch.com/]

________________________________________________________________________
Yahoo! India Mobile: Download the latest polyphonic ringtones.
Go to http://in.mobile.yahoo.com



From cavada at irst.itc.it  Thu Jan 15 07:25:36 2004
From: cavada at irst.itc.it (Roberto Cavada)
Date: Thu, 15 Jan 2004 13:25:36 +0100
Subject: [ANNOUNCE] gtkmvc-0.9.0
Message-ID: <1074169536.26364.233.camel@stadio>

MVC Framework for Pygtk2 version 0.9.0 has been released. 

MVC is a fully Python-based implementation of the Model-View-Controller
and Observer patterns for the Pygtk2 toolkit. 
MVC is a pattern that can be successfully used to design and develop
well structured GUI applications. 

The MVC pattern basically helps in separating sematics and data of the
application, from their representation. The Observer pattern is also
embedded here. This pattern allows making separated parts independent,
but still connected each other. 

About this implementation:
- easy to understand and to use
- makes code extremely easy to write and read
- fully documented
- straightly runs under many platforms (unixes, windows, solaris,
  etc.)
- essential, it does only what it was designed for
- can be ported to other graphic toolkits, since the view component 
  depends on pygtk2

Latest version and information can be found at this URL:
       <P><A
HREF="http://sra.itc.it/people/cavada/mvc/index.html">gtkmvc 0.9.0</A> -
Python-based Model-View-Controller framework for the Pygtk2 toolkit. 
(15-01-04)

License is LGPL. 

-- 
  _/_/_/   _/_/_/   Roberto Cavada                                   
 _/   _/ _/        ITC-irst   http://www.irst.itc.it                 
_/   _/ _/        Automated Reasoning Systems - Formal Methods Group 
/_/_/  _/        Via Sommarive, 18 - 38050 Povo (TN) - Italy         
   _/  _/       Tel: +39 0461 314 328   Fax: +39 0461 302 040        
    _/   _/_/  cavada at irst.itc.it   http://sra.itc.it/people/cavada




From Vincent.Raaijmakers at ge.com  Tue Jan 27 08:42:41 2004
From: Vincent.Raaijmakers at ge.com (Raaijmakers, Vincent (GE Infrastructure))
Date: Tue, 27 Jan 2004 07:42:41 -0600
Subject: JPG - PNG conversion problem
Message-ID: <971323274247EB44B9A01D0A3B424C8505907BF8@FTWMLVEM02.e2k.ad.ge.com>

I agree with all te comments that I got regarding the expected growth of my file size in PNG.

However, when I use Gimp in Linux, the PNG conversion (using default settings) on the same picture, the file size grows form 14k (JPG) to 18k (PNG). Using PythonMagick it grows to 64k!!

So, why is Gimp more efficient in the conversion?
I must be doing something different. 

Today I will try to use some Java imaging libraries to see how efficient they are. A growth from 14k to 64k is unacceptable. We are talking about a picture with a size of 160x120.

For now, what tips and tricks are available to reduce my output file size using Magick?
Tried to work with filtering and quality settings, no huge results so far.

Vincent

-----Original Message-----
From: python-list-bounces+vincent.raaijmakers=ge.com at python.org
[mailto:python-list-bounces+vincent.raaijmakers=ge.com at python.org]On
Behalf Of Jason Harper
Sent: Monday, January 26, 2004 10:00 PM
To: python-list at python.org
Subject: Re: JPG - PNG conversion problem


"Raaijmakers, Vincent (GE Infrastructure)" wrote:
> Who can explain the huge increase in size when I convert a JPG into a PNG format using PythonMagick:
> I read the JPG from a video server and has a resolution of 352x240, size is about 15k
> After my PNG conversion and resizing the resolution to 160*120, the size is 64k!!

JPEG is a lossy compression format (well, normally - there are some
obscure exceptions to this).  It throws away subtle details (details
that the human eye is relatively insensitive to) in order to achieve its
high compression ratios.

PNG uses only lossless compression.  You are guaranteed that the image
you get out will be pixel-for-pixel identical to the image you put in. 
Unfortunately, this greatly limits the possibilities for compression -
in fact, no lossless compressor can guarantee ANY reduction in file size
over all possible inputs.

Basically, converting a lossy to a lossless format gives you worst of
both worlds - the loss of detail of one, and the large file size of the other.
	Jason Harper
-- 
http://mail.python.org/mailman/listinfo/python-list



From try_vanevery_at_mycompanyname at yahoo.com  Tue Jan 13 06:30:41 2004
From: try_vanevery_at_mycompanyname at yahoo.com (Brandon J. Van Every)
Date: Tue, 13 Jan 2004 03:30:41 -0800
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
Message-ID: <bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>


"Brandon J. Van Every" <try_vanevery_at_mycompanyname at yahoo.com> wrote in
message news:bsd101$c1oj1$1 at ID-207230.news.uni-berlin.de...
> I am
>
> - *TENTATIVELY* -
>
> (operative word) undertaking the project of porting the GPL open source
game
> "Freeciv" to Python.  Freeciv is, in essence, an almost straight clone of
> Sid Meier's Civilization II, albeit with better cross-platform and
> multiplayer support.  www.freeciv.org

Here's a postmortem.  Short version: I've canned the project.  Many of you
will say "I told you so," but at least I almost have a VS .NET 2003 build to
show for it.

First I decided to tackle the subgoal of freeing Freeciv from the UNIX
Cygwin / MinGW crud.  As I write this, I have it compiling and running on VS
.NET 2003, and that isn't a small accomplishment.  But, the game hangs
shortly after the server starts.  I'm probably within spitting distance of
completing this subgoal, but it has taken too long and has been really
really boring.  If there isn't some major lurking horror I'll get it working
eventually, but I've put it on the backburner.  Personal projects have to be
personally rewarding, and this isn't it.

Looking at the Freeciv C code in more detail, I've realized that there's way
too much code to consider "generally" rewriting stuff in Python.  Rather,
I'd have to embed Python and add / rework game functionality piecemeal.
This is a lot of work, there's a whole lot of boring "wrapper code" to cough
up.  Between performing this kind of labor on a GPL project, and performing
it for Ocean Mars, I've decided that the former is not rational.  And more
importantly, it doesn't make me happy.

I've also become extremely disillusioned with Open Source developers.
Basically, for a commercially minded developer such as myself, I don't think
they're any value add at all.  Ergo, all public projects I might conceive of
are fundamentally DOA.

For 6 months I've experimented with how Open Source development might fit my
commercial goals.  What I've found is that I can't rely on people, only
their coding artifacts.  Every Open Source game developer I've met in the
past 6 months has been, at a basic level, a hobbyist.  Hobbyists simply
don't manage projects according to the demands of commercial development.
This implies that if I'm in charge, they won't like my style; and when
they're in charge, it drives me fucking nuts.  I've now accepted that the
Open Source talent pool is what it is.  It is capable of being fun for
programmer geeks.  But with few exceptions, such as perhaps
http://nebula.sourceforge.net, it cannot achieve the kinds of projects I
have in mind.

I'm also starting to downright despise Linuxers.  If I see another project
that's "cross-platform, so long as your platform is Linux," I'm going to cut
someone's head off.  Linuxers have this completely broken piece of shit
build management mentality about them.  They think that because on *their*
OS all these libraries are preinstalled, and everyone's compiling things all
the time, that they don't have to do anything to maintain consistent builds
on other platforms.  Rather, it's always the induhvidual's responsibility to
download and install all the needed component libraries.  Of course these
are usually UNIX-centric libraries, often not readily compiled on Windows.
Or requiring Cygwin or MinGW, which real Windows developers don't want to
use.  Versioning becomes a nightmare, is it the Cygwin or MinGW version?
It's just not the way mainstream Windows developers do things.

Whether my Freeciv VS .NET 2003 build makes it into the official Freeciv
source pool remains to be seen.  The Freeciv people are, after all, a bunch
of Linuxers.  They don't have a single .NET developer among them, and I'm
not about to become their .NET buildmaster.  When I say things like "Windows
people want to link libpng and zlib against MSVCRT71.dll," they say, "we
don't want to bloat our source tree with needed libraries."  Maybe in time I
will get them to accept a separate package of underlying libraries for
Windows folk.

-- 
Cheers,                         www.indiegamedesign.com
Brandon Van Every               Seattle, WA

"Desperation is the motherfucker of Invention." - Robert Prestridge



From http  Thu Jan 22 00:16:52 2004
From: http (Paul Rubin)
Date: 21 Jan 2004 21:16:52 -0800
Subject: Secure Voting software
References: <87zncgy544.fsf@strauser.com>
	<20040122000103.21852.00000518@mb-m06.aol.com>
Message-ID: <7xu12oftq3.fsf@ruckus.brouhaha.com>

piedmontbiz at aol.com (PiedmontBiz) writes:
> I checked out the site:     http://gnosis.python-hosting.com/voting-project/
> 
> This is a huge and important project. I suppose the programming
> language is really not that important.  The issue is trustworthy
> system development (applications, operating systems, drivers,
> libraries, hardware, etc.), and developing ways to validate
> software.

There's bigger problems than any software can solve.  See
http://www.blackboxvoting.com a view of some of them.



From rick_muller at yahoo.com  Wed Jan 21 11:22:57 2004
From: rick_muller at yahoo.com (Rick Muller)
Date: 21 Jan 2004 08:22:57 -0800
Subject: distutils uninstall
Message-ID: <5eb8fb88.0401210822.55b60ef7@posting.google.com>

I've been trying to figure out whether there are any plans to add an
"uninstall" feature to the Python distutils. Googling has found
several people posting the same question, but, to the best of my
knowledge, no answers.

Can anyone tell me whether this has been proposed before? Thanks in
advance.


From claird at lairds.com  Mon Jan 12 16:42:07 2004
From: claird at lairds.com (Cameron Laird)
Date: Mon, 12 Jan 2004 21:42:07 -0000
Subject: Why learn Python ??
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<btubno$bd8k6$1@ID-46268.news.uni-berlin.de>
Message-ID: <100655fo84c2211@corp.supernews.com>

In article <btubno$bd8k6$1 at ID-46268.news.uni-berlin.de>,
Derek <none at none.com> wrote:
			.
			.
			.
>I would not dismiss C++ (or even vanilla C) outright.  I strongly
>suggest starting in Python and looking to C and C++ when you have good
>reason -- that is, when those languages will let you do something that
>Python is less than than stellar at:  large applications, system
>software, performance-critical applications, embedded programming,
>etc.
			.
			.
			.
I contest the proposition that "Python is less than stellar at
large applications ...", and, in particular, that C++ is super-
ior there.  I recognize you're not alone in that; for me, though,
large-scale programming is one of Python's *strengths*.

I don't have a good decision mechanism to propose.  Trial by 
ordeal (and most large-team projects fit in that category) seems
as apt as any.
-- 

Cameron Laird <claird at phaseit.net>
Business:  http://www.Phaseit.net


From me at privacy.net  Wed Jan 28 07:36:59 2004
From: me at privacy.net (Duncan Booth)
Date: 28 Jan 2004 12:36:59 GMT
Subject: Python Importing and modifying print
References: <9742a725.0401280426.329d2178@posting.google.com>
Message-ID: <Xns947E80544C95duncanrcpcouk@127.0.0.1>

kenney at netacc.net (J. Kenney) wrote in 
news:9742a725.0401280426.329d2178 at posting.google.com:

> Good Morning, 
> 
> Is there a way for a function called within an _imported_ 
> library to call back to _calling_ python program to run a 
> function? (Shown below) 

Yes, you *could* do that, see the code below: the script is loaded into a 
module called __main__ so all you have to do is import __main__ and you can 
access the scripts variables.

> #newlib.py
import __main__
def go():
   __main__.main()
   __main__.main()
go()

This still won't have quite the results you want, as the function main 
doesn't exist at the point when you import the other module. You need to 
define it before the import (remember, the code in a module is executed 
the first time the module is imported):

#first_file.py
#!/usr/local/bin/python
def main():
   print 'hi'

import newlib


However, you probably don't want to do that. A much better solution is 
either to put your 'main' function into another module, or to pass the 
callback function around as a parameter:

#first_file.py
import newlib

def main():
    print 'gi'

newlib.go(main)

#newlib.py
def go(where):
   where()
   where()


> 
> Also can you overload the print function to have it do
> redirect output to an array for a bit, and then switch
> it back.  (for example: right before importing make print
> append each line to an array vice printing it, then going
> back to normal after the import is complete.)
> 
Yes, the easiest way would be to reassign sys.stdout to put output into 
your array using cStringIO and then restore sys.stdout after you have 
finished. Again though, it isn't a good idea to do real work on an import; 
much better to do the work in a function and have no real code in the 
imported module.



From sandskyfly at hotmail.com  Wed Jan 21 05:36:22 2004
From: sandskyfly at hotmail.com (Sandy Norton)
Date: 21 Jan 2004 02:36:22 -0800
Subject: personal document mgmt system idea
References: <b03e80d.0401200538.10fcf33a@posting.google.com>
	<bujmjn$rkn$05$1@news.t-online.com>
Message-ID: <b03e80d.0401210236.f9dcf01@posting.google.com>

Stephan Diehl wrote:

[...]

> Just dump your files somewhere in the filesystem and keep a record of it in
> your database.

I think I will go with this approach. (see other posting for details)


> In addition, a real (text) search engine might be of help. I'm using swish-e
> (www.swish-e.org) and are very pleased with it.

Just downloaded it... looks good. Now if it also had a python api (-;

> Maybe, before you invest to much time into such a project, you should check
> out the following:
> 
> Chandler (http://www.osafoundation.org)
>         if it's finished, it will do excactly what you are aiming for (and 
>         it's written in Python)

Still early stages... I see they dropped the ZODB.

> ReiseFS (see www.namesys.com -> Future Vision)
> Gnome Storage (http://www.gnome.org/~seth/storage)
> WinFS
> (http://msdn.microsoft.com/Longhorn/understanding/pillars/WinFS/default.aspx)


Wow! Very exciting stuff... I guess we'll just have to wait and see what develops.


> Hope that helps

Yes. Very informative. Cheers for the help.

> Stephan

Sandy


From amuys at shortech.com.au  Sun Jan 18 21:08:29 2004
From: amuys at shortech.com.au (Andrae Muys)
Date: 18 Jan 2004 18:08:29 -0800
Subject: Suggested generator to add to threading module.
References: <7934d084.0401152058.164a240c@posting.google.com>
	<bu998t$o62$1@panix1.panix.com>
Message-ID: <7934d084.0401181808.6e698042@posting.google.com>

aahz at pythoncraft.com (Aahz) wrote in message news:<bu998t$o62$1 at panix1.panix.com>...
> In article <7934d084.0401152058.164a240c at posting.google.com>,
> Andrae Muys <amuys at shortech.com.au> wrote:
> >
> >Found myself needing serialised access to a shared generator from
> >multiple threads.  Came up with the following
> >
> >def serialise(gen):
> >  lock = threading.Lock()
> >  while 1:
> >    lock.acquire()
> >    try:
> >      next = gen.next()
> >    finally:
> >      lock.release()
> >    yield next
> 
> I'm not sure this is generic enough to go in the standard library.
> Usually, I'd recommend that someone wanting this functionality consider
> other options in addition to this (such as using Queue.Queue()).

I'm curious to know how a Queue.Queue() provides the same
functionality?  I have always considered a Queue.Queue() to be an
inter-thread communcation primitive.  serialise() (at least the
corrected version discussed later in this thread) is strictly a
synchronisation primitive.

Andrae


From jepler at unpythonic.net  Mon Jan  5 20:37:08 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Mon, 5 Jan 2004 19:37:08 -0600
Subject: Repost: Can't sys.exit() from SIGTERM handler?
In-Reply-To: <NFBBICMEBHKIKEFBPLMCGEIBGPAA.aathan-python-5923@cloakmail.com>
References: <NFBBICMEBHKIKEFBPLMCKEIAGPAA.aathan-python-5923@cloakmail.com>
	<NFBBICMEBHKIKEFBPLMCGEIBGPAA.aathan-python-5923@cloakmail.com>
Message-ID: <20040106013708.GD5514@unpythonic.net>

If I had to guess, I'd bet you had a blanket exception handler
somewhere.  sys.exit merely raises SystemExit, and if this exception
propogates all the way back up, Python treats it specially by exiting
instead of printing the exception's traceback.

:r term.py
import os, signal, time, sys, traceback

def sigterm(a, b):
	print "sigterm"
	sys.exit()

signal.signal(signal.SIGTERM, sigterm)

os.system("(sleep 1; kill %s) &" % os.getpid())

print "Sleeping (should be killed)"

try:
	time.sleep(2)
except SystemExit:
	traceback.print_exc()
	raise

print "sleep finished (!?)"

:r!python -u term.py

Sleeping (should be killed)
sigterm
Traceback (most recent call last):
  File "term.py", line 14, in ?
    time.sleep(2)
  File "term.py", line 5, in sigterm
    sys.exit()
SystemExit



From tepihlaj at NOpaju.SPAMoulu.fi  Mon Jan  5 20:58:02 2004
From: tepihlaj at NOpaju.SPAMoulu.fi (Tero Pihlajakoski)
Date: 6 Jan 2004 01:58:02 GMT
Subject: Grab input&output of program on Windows
References: <btd05f$5vg$1@news.Stanford.EDU>
Message-ID: <btd4na$nub$1@ousrvr3.oulu.fi>

Patrick L. Nolan <pln at cosmic.stanford.edu> wrote:
> I'm going nuts trying to port an application from Linux
> to Windows.  We have a python/Tkinter script which runs
> a C++ application.  It starts it with popen4 and 
> communicates through the two pipes.  It reads text output
> from stdout until a prompt appears, then sends commands
> through stdin.

Sorry, if this is basic, but: Did you flush() after write()? Try using
popen2() (there was something about popen4() on win32...), if possible
(import popen2, etc.)?

> On Windows it seems to get all tangled up in the buffering
> of the two streams.  When the script just reads stdout, it
> seems to be OK.  As soon as the first command is sent to
> stdin, stdout blocks forever.

> I tried borrowing an idea from the Python Cookbok, recipe
> 9.6.  I made the streams nonblocking and put a call to
> select in a loop.  The results were promising on Linux,
> but there was a mysterious error message on Windows.
> I think select works only for sockets, not pipes.

> This seems like the sort of thing that might be solved by
> expect.  Will that work?  Is there some other way?


-- 



From seanl at chaosring.org  Sat Jan  3 22:06:31 2004
From: seanl at chaosring.org (Sean R. Lynch)
Date: Sat, 03 Jan 2004 19:06:31 -0800
Subject: Creating a capabilities-based restricted execution system
In-Reply-To: <bt7i9i$236v$1@nadya.doma>
References: <LmmdnUn4seDeGWuiXTWc-w@speakeasy.net> <bt788l$1pej$1@nadya.doma>
	<d7ycncKp5rket2qiXTWc-g@speakeasy.net> <bt7i9i$236v$1@nadya.doma>
Message-ID: <srudnTjvU9BOH2qiRVn-uA@speakeasy.net>

Serge Orlov wrote:
> You're right, the wording is not quite correct. My point was that it should
> take effort to make attributes _public_, for example, going to another
> source line and typing attribute name or doing whatever "declaration" means.
> This way adding new attribute or leaking "unsecured" object will
> raise an exception when untrusted code will try to access it. Otherwise
> one day something similar to rexec failure will happen: somebody
> added __class__ and __subclasses__ attributes and rexec blindly
> allowed to access them. The leading underscore doesn't matter, it
> could be name like encode/decode that is troublesome.
> 
> By the way, my code above is buggy, it's a good idea that you're
> not going to use it :) Let me try it the second time in English words:
> If the attribute 'attr' is declared public give it. If the function with
> UUID has access to attribute 'attr' on object 'obj' give it. Otherwise fail.

Ok, I think you've pretty much convinced me here. My choices for 
protected attributes were to either name them specially and only allow 
those attribute accesses on the name "self" (which I treat specially), 
or to make everything protected by default, pass all attribute access 
through a checker function (which I was hoping to avoid), and check for 
a special attribute to define which attributes are supposed to be 
public. Do you think it's good enough to make all attributes protected 
as opposed to private by default?

> Nevermind, it's just a scary word :) It can concern you if you worry
> about information leaking from one security domain to another. Like
> prisoners knocking the wall to pass information between them. In
> computers it may look like two plugins, one is processing credit
> cards and the other one has capability to make network connections.
> If they are written by one evil programmer the first one can "knock
> the wall" to pass the information to the second. "knocking the wall"
> can be encoded like quick memory allocation up to failure = 1, no
> quick memory allocation = 0. Add error correction and check summing
> and you've got a reliable leak channel.

Hmmm, I think this would be even more difficult to protect from than 
doing resource checks. Fortunately, I'm not planning on processing any 
credit cards with this code. The primary purpose is so that multiple 
programmers (possibly thousands) can work in the same memory space 
without stepping on one another.

> I'm not sure how to deal with str.encode too. You don't know what
> kind of codecs are registered for that method for sure, one day there
> could be registered an unknown codec that does something unknown.
> Shouldn't you have two (or several) codecs.py modules(instances?)
> for trusted and untrusted code? And str.encode should be transparently
> redirected to the proper one?

I guess I'll just make attributes protected by default, and force the 
programmer to go out of their way to make things public. Then I can use 
the Zope/RestrictedPython technique of assuming everything is insecure 
until proven otherwise, and only expose parts of the interface on 
built-in types that have been audited.

Thank you very much for your extremely informative responses!


From RAV at ns.artphila.com  Wed Jan 28 03:30:57 2004
From: RAV at ns.artphila.com (RAV at ns.artphila.com)
Date: Wed, 28 Jan 2004 10:30:57 +0200
Subject: RAV AntiVirus scan results
Message-ID: <200401280830.i0S8UvLr005550@ns.artphila.com>


RAV AntiVirus for Linux i686 version: 8.3.2 (snapshot-20020108)
Copyright (c) 1996-2001 GeCAD The Software Company. All rights reserved.
Registered version for 2 domain(s).
Running on host: ns.artphila.com

-----------------------
 RAV Antivirus results
-----------------------

The infected file was saved to quarantine with name: 1075278657-RAVi0S8UrLr005535.
The file (part0002:file.zip)->file.pif attached to mail (with subject:MAIL DELIVERY SYSTEM) sent by python-list at python.org to phila at artphila.com, 
is infected with virus: Win32/Mydoom.A at mm.
Cannot clean this file.
Cannot delete this file (most probably it's in an archive).
The mail was not delivered because it contained dangerous code.

------------------------
this is a copy of the e-mail header:




Scan engine 8.11 () for i386.
Last update: Tue Jan 27 05:03:51 2004
Scanning for 89279 malwares (viruses, trojans and worms).

To get a free 60-days evaluation version of RAV AntiVirus v8
(yet fully functional) please visit:

   http://www.ravantivirus.com




From sross at connectmail.carleton.ca  Sun Jan 25 11:19:00 2004
From: sross at connectmail.carleton.ca (Sean Ross)
Date: Sun, 25 Jan 2004 11:19:00 -0500
Subject: xrange not hashable - why not?
References: <mailman.764.1075042048.12720.python-list@python.org>
	<FSRQb.95$qU3.31981@news20.bellglobal.com>
Message-ID: <z0SQb.100$qU3.34496@news20.bellglobal.com>


"Sean Ross" <sross at connectmail.carleton.ca> wrote in message
news:FSRQb.95$qU3.31981 at news20.bellglobal.com...
> There's a bit of an efficiency issue with using 'n in k' for something
like
> xrange(100, sys.maxint),
> since you have to walk through the items in that range to see if n is in
> there, and that's a large range.

Hmm, I don't think what I said there is correct, please disregard.

Sorry for any confusion,
Sean




From michele.simionato at poste.it  Tue Jan 13 04:30:30 2004
From: michele.simionato at poste.it (Michele Simionato)
Date: 13 Jan 2004 01:30:30 -0800
Subject: Why learn Python ??
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<pan.2004.01.12.20.18.36.606924@yahoo.com>
Message-ID: <95aa1afa.0401130130.3b0cd694@posting.google.com>

Samuel Walters <swalters_usenet at yahoo.com> wrote in message news:<pan.2004.01.12.20.18.36.606924 at yahoo.com>...
> Lisp/Scheme:
> Lisp and Scheme are two languages that people claim will give you
> Jedi-like powers as a programmer.  I'm learning them right now, so I can't
> give you advice on why one would learn them.

I can think of two situations:

1. You want to learn more about programming.
2: You want to implement your own programming language.

About 1: Lisp/Scheme are traditionally at the frontier of the research
in programming languages, so they have everything (Common Lisp) or
you can easily implement everything (Scheme). So, when you have learned
Lisp/Scheme, you have learned nearly every concepts in programming.
This is the reason why (IMHO opinion) you should not try to learn them
as first languages, especially Common Lisp. It is too difficult.
Learn Python first!

About 2: if you want to implement a programming language, it is much
easier to write it on top of Lisp/Scheme (thanks to the macro facility) 
than to write it from scratch. Of, course, if you want performance,
you would implement it in C, but still Lisp/Scheme can be useful to
prototype it.

Apart for these two situations, I would stay with Python. Just my 2 eurocents,

   Michele


From max at alcyone.com  Wed Jan 14 18:31:08 2004
From: max at alcyone.com (Erik Max Francis)
Date: Wed, 14 Jan 2004 15:31:08 -0800
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
	<K_YMb.10994$9k7.204413@news.xtra.co.nz>
	<bu1qq3$cu440$1@ID-207230.news.uni-berlin.de>
	<n22Nb.11299$9k7.210522@news.xtra.co.nz>
	<bu2pgs$d123a$1@ID-207230.news.uni-berlin.de>
	<NlhNb.11982$9k7.221029@news.xtra.co.nz>
	<bu4dpe$dlvrs$1@ID-207230.news.uni-berlin.de>
Message-ID: <4005D13C.65347E30@alcyone.com>

Brandon Van Every wrote:

> Referring to Bent's astute post, it's more like criticizing an OSS
> restaurant that says it serves a lot of things, but in fact doesn't.
> "Cross-platform, so long as your platform is Linux."

Unix, not Linux.  You may not care about the non-Linux Unix, but the
developers do.  You characterizing it as Linux only is just ignorance. 
There are different levels of portability; the fact that Windows
portability may not be high on some peoples' priorities doesn't mean
that their code still can't be widely portable.

But, of course, even that assertion is wrong to begin with.  Freeciv.org
indicates that there are both Cygwin and win32 native ports.  You're
just complaining that there isn't a .NET port, something which the
developers never promised (and probably rightly don't care about at this
point).

As usual, you are all bluster and no content.

-- 
 __ Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
/  \ San Jose, CA, USA && 37 20 N 121 53 W && &tSftDotIotE
\__/ Patiently, I'm still / Holding out until
    -- Sandra St. Victor


From iny+news at iki.fi  Wed Jan 14 14:11:46 2004
From: iny+news at iki.fi (=?iso-8859-1?q?Ilpo_Nyyss=F6nen?=)
Date: Wed, 14 Jan 2004 21:11:46 +0200
Subject: Does anyone else not find the fun in programming...?
References: <d232c5e.0401130823.27fd26ff@posting.google.com>
Message-ID: <m3wu7ucpl9.fsf@iny.iki.fi>

chris.lyon at spritenote.co.uk (Chris Lyon) writes:

> This is work dammit,

At work you do what you are told to do. As a hobby you can do what you
want to do. Both can be fun. Just compare programming to filling a
crossword puzzle or writing a poem.

Programming gives something to think about. And then finding a
solution for a problem or getting the program released or getting good
feedback... the feelings can be awesome.

And then, look at the code, it can be ugly or beautiful. Python
luckily makes you to write better looking code. :) 

-- 
Ilpo Nyyss?nen # biny # /* :-) */


From rshaw2 at midsouth.rr.com  Tue Jan 27 18:15:42 2004
From: rshaw2 at midsouth.rr.com (Richard)
Date: 27 Jan 2004 15:15:42 -0800
Subject: [ANN] ip2cc-0.3: now it works with Python 2.3
References: <mailman.866.1075218376.12720.python-list@python.org>
Message-ID: <84e0f331.0401271515.2ed5c4f0@posting.google.com>

I get an error when trying to use it... here's the problem below:

C:\Tools>ip2cc.py www.google.com
Traceback (most recent call last):
  File "C:\Tools\ip2cc.py", line 338, in ?
    db = CountryByIP(db_file)
  File "C:\Tools\ip2cc.py", line 14, in __init__
    self.fp = open(filename, 'rb')
IOError: [Errno 2] No such file or directory: 'C:\\Tools\\ip2cc.db'

Looks like the database file is not included with the download.

Richard


From skip at pobox.com  Wed Jan 21 11:34:07 2004
From: skip at pobox.com (Skip Montanaro)
Date: Wed, 21 Jan 2004 10:34:07 -0600
Subject: distutils uninstall
In-Reply-To: <5eb8fb88.0401210822.55b60ef7@posting.google.com>
References: <5eb8fb88.0401210822.55b60ef7@posting.google.com>
Message-ID: <16398.43519.420033.297431@montanaro.dyndns.org>


    Rick> I've been trying to figure out whether there are any plans to add
    Rick> an "uninstall" feature to the Python distutils. Googling has found
    Rick> several people posting the same question, but, to the best of my
    Rick> knowledge, no answers.

This has been proposed before.  It's not a trivial problem though.
Distutils would need to record all the files and directories it creates
during installation and carefully remove stuff during the uninstall process
(do things "backwards", not remove directories which still contain files,
etc).  That wouldn't be foolproof though, because unlike packaging systems
such as Red Hat's RPM, you don't have a full system picture.  What if your
distutils-installed package provides a new version of /etc/magic?  If you
uninstall it, /etc/magic would be deleted, since distutils couldn't tell
that /etc/magic was actually used by many other parts of the system.

Skip




From todcsmith at yahoo.com  Mon Jan 19 11:21:33 2004
From: todcsmith at yahoo.com (todd smith)
Date: 19 Jan 2004 08:21:33 -0800
Subject: problems with os.path.isdir on windows shares (i've read the
	FAQ)
References: <4489035c.0401161545.75b63ce@posting.google.com>
	<bua2ud$cm7$1@news-reader2.wanadoo.fr>
Message-ID: <4489035c.0401190821.bf3ff14@posting.google.com>

"Michel Claveau/Hamster" <No.Spam.mc at No.Spam.mclaveau.No.Spam.com> wrote in message news:<bua2ud$cm7$1 at news-reader2.wanadoo.fr>...
> Hi !
> 
> \\\\ren\\backup   is perhaps no a directory, but the name of a shared
> ressource.
> 
> 
> 
> @-salutations


i'm a bit confused as to what you mean by a shared resource. but
\\ren\backup is definately a shared directory, i mkdir'd it myself :)


From tleese22 at yahoo.com  Sun Jan 18 22:05:14 2004
From: tleese22 at yahoo.com (Taylor Leese)
Date: Sun, 18 Jan 2004 19:05:14 -0800 (PST)
Subject: Python 2.3.3 on FreeBSD 4.8
Message-ID: <20040119030514.48456.qmail@web60501.mail.yahoo.com>

I am trying to compile Python 2.3.3 on FreeBSD 4.8 and
I am getting this compiling error. Anybody have any
ideas?

case $MAKEFLAGS in  *-s*)  CC='gcc' LDSHARED='cc
-shared' OPT='-DNDEBUG -g -O3 -Wall
-Wstrict-prototypes' ./python -E ./setup.py -q build;;
 *)  CC='gcc' LDSHARED='cc -shared' OPT='-DNDEBUG -g
-O3 -Wall -Wstrict-prototypes' ./python -E ./setup.py
build;;  esac
Traceback (most recent call last):
  File "./setup.py", line 1148, in ?
    main()
  File "./setup.py", line 1143, in main
    scripts = ['Tools/scripts/pydoc',
'Tools/scripts/idle']
  File
"/home/cleverli/public_html/Python-2.3.3/Lib/distutils/core.py",
line 123, in setup
    dist.parse_config_files()
  File
"/home/cleverli/public_html/Python-2.3.3/Lib/distutils/dist.py",
line 330, in parse_config_files
    filenames = self.find_config_files()
  File
"/home/cleverli/public_html/Python-2.3.3/Lib/distutils/dist.py",
line 293, in find_config_files
    check_environ()
  File
"/home/cleverli/public_html/Python-2.3.3/Lib/distutils/util.py",
line 155, in check_environ
    import pwd
ImportError: No module named pwd
*** Error code 1

__________________________________
Do you Yahoo!?
Yahoo! Hotjobs: Enter the "Signing Bonus" Sweepstakes
http://hotjobs.sweepstakes.yahoo.com/signingbonus



From nav+posts at bandersnatch.org  Thu Jan 15 15:38:49 2004
From: nav+posts at bandersnatch.org (Nick Vargish)
Date: 15 Jan 2004 15:38:49 -0500
Subject: New candidate for Python mascot
References: <mailman.33.1072767618.8134.python-list@python.org>
Message-ID: <m3y8s9t09y.fsf@tanelorn.bandersnatch.org>

Tim Churches <tchur at optushome.com.au> writes:

> See http://news.independent.co.uk/world/asia/story.jsp?story=476931

For those who like to have a visual of the proposed mascot:

http://story.news.yahoo.com/news?tmpl=story&u=/040107/1911/bthde3bgn1

Unfortunately, it fails both the cute-and-cuddly and the
can-I-take-it-home tests. 

Nick

-- 
#  sigmask  ||  0.2  ||  20030107  ||  public domain  ||  feed this to a python
print reduce(lambda x,y:x+chr(ord(y)-1),' Ojdl!Wbshjti!=obwAcboefstobudi/psh?')


From shevitz at lanl.gov  Fri Jan 23 17:54:02 2004
From: shevitz at lanl.gov (Danny Shevitz)
Date: Fri, 23 Jan 2004 15:54:02 -0700
Subject: help with unittest
Message-ID: <4011a610$1_2@news3.es.net>

Why doesn't the following code snippet work?

The error is

ImportError: No module named myTestCase2

TIA,
Danny

%<--------------------------------------------------------------------

# import the unittest module
import unittest

# create the first testcase
class myTestCase(unittest.TestCase):

 def testTrue(self):
  self.assertEqual(1,1)

# create the first testcase
class myTestCase2(unittest.TestCase):

 def testTrue(self):
  self.assertEqual(1,1)


if __name__ == '__main__':
 #unittest.main()
 suite =
unittest.defaultTestLoader.loadTestsFromNames(['myTestCase2.testTrue'])
 unittest.TextTestRunner().run(suite)







From bignose-hates-spam at and-benfinney-does-too.id.au  Wed Jan 21 23:36:55 2004
From: bignose-hates-spam at and-benfinney-does-too.id.au (Ben Finney)
Date: 22 Jan 2004 15:26:55 +1050
Subject: Secure Voting software
References: <20040121174434.28446.00000428@mb-m15.aol.com>
	<7xvfn4lq9m.fsf@ruckus.brouhaha.com> <87zncgy544.fsf@strauser.com>
Message-ID: <slrnc0um0n.flo.bignose-hates-spam@iris.polar.local>

On Thu, 22 Jan 2004 04:35:07 GMT, Kirk Strauser wrote:
> At 2004-01-22T01:35:01Z, Paul Rubin <http://phr.cx at NOSPAM.invalid> writes:
>> The book "Security Engineering" by Ross Anderson is a good place to start
>> reading if you're interested in the subject.
> 
> I just finished "Practical Cryptography" by Niels Ferguson and Bruce
> Schneier.  It was almost enough to make me not want to bother trying.
> :-/

Security is much more than just cryptography.  Program reliability,
protection from bad input, protection from other misbehaving programs;
mitigation of *any* kind of risk or threat is the realm of security.

-- 
 \        "Last year I went fishing with Salvador Dali. He was using a |
  `\       dotted line. He caught every other fish."  -- Steven Wright |
_o__)                                                                  |
Ben Finney <http://bignose.squidly.org/>


From james at logicalprogression.net  Wed Jan 21 16:24:48 2004
From: james at logicalprogression.net (James Henderson)
Date: Wed, 21 Jan 2004 21:24:48 +0000
Subject: Need help with Python class idioms
In-Reply-To: <20040121210142.GA27469@mail.theserver.ath.cx>
References: <f5c5dc88.0401211243.7e81a26b@posting.google.com>
	<200401212101.33605.james@logicalprogression.net>
	<20040121210142.GA27469@mail.theserver.ath.cx>
Message-ID: <200401212124.48006.james@logicalprogression.net>

On Wednesday 21 January 2004 9:01 pm, Jonathan Daugherty wrote:
> # P.S. Since you're asking about idiom, it would be more Pythonic to write:
> #
> #     if self.mandatoryVar1 is None:
> #
> # using the identity test "is" rather than equality test "==", since there
> is # only one None.
>
> I'd write
>
>   if not self.mandatoryVar1:
>
> but the first method works, too.

Are you sure an empty sequence or zero aren't valid values?  J.
-- 
James Henderson, Logical Progression Ltd.
http://www.logicalprogression.net/
http://sourceforge.net/projects/mailmanager/




From cygnus at cprogrammer.org  Sat Jan 24 11:01:53 2004
From: cygnus at cprogrammer.org (Jonathan Daugherty)
Date: Sat, 24 Jan 2004 11:01:53 -0500
Subject: progress bar
In-Reply-To: <9pwQb.5566$vy6.3518@newssvr29.news.prodigy.com>
References: <59e5b87.0401231329.6e084d6f@posting.google.com>
	<mailman.715.1074893879.12720.python-list@python.org>
	<9pwQb.5566$vy6.3518@newssvr29.news.prodigy.com>
Message-ID: <20040124160153.GA14409@mail.theserver.ath.cx>

# > Try Venster:
# > http://venster.sourceforge.net
# >
# > IIRC the test_coolbar.py script includes a progress bar.
# 
# I wonder what possessed someone to start another GUI framework.  Aren't
# there more than enough existing ones?  The reasoning for it wasn't
# immediately apparent on the web page.

Aside from any pure utility, because it's fun. :)

-- 

  Jonathan Daugherty
  http://www.cprogrammer.org

  "It's a book about a Spanish guy called Manual, you should read it."
                                                            -- Dilbert



From klappnase at web.de  Wed Jan 21 22:20:10 2004
From: klappnase at web.de (klappnase)
Date: 21 Jan 2004 19:20:10 -0800
Subject: Tkinter bitmap bug ?
References: <a7a67196.0401210914.1c227978@posting.google.com>
	<bumf5u$ovj$1@news-reader5.wanadoo.fr>
Message-ID: <a7a67196.0401211920.7888d706@posting.google.com>

Eric Brunel <eric.brunel at N0SP4M.com> wrote in message news:<bumf5u$ovj$1 at news-reader5.wanadoo.fr>...
 
> As you saw, this won't work: the only way I found to set an iconbitmap on a 
> window is using the '@/path/to/file' syntax. Why not keep the data for your 
> image in the code and generate a temporary file from this data? Then you can use 
> the '@...' stuff without having to carry an external file everywhere. Just don't 
> forget to delete the file when your application exits. We do that all the time 
> and it works quite fine.
> 
> HTH

Thanks, I have tried this already, too and it works fine, I just
thought there
might be a more "elegant" solution; however I still wonder why the
Bitmap in
my test2() function does not appear. I looked at many suggestions that
have been made
how to create bitmaps out of strings with the BitmapImage class and
nothing seems to work.
It still looks to me like a bug.

Thanks and best regards

Michael


From Mike at DeleteThis.Geary.com  Wed Jan 21 01:16:52 2004
From: Mike at DeleteThis.Geary.com (Michael Geary)
Date: Tue, 20 Jan 2004 22:16:52 -0800
Subject: Help, *.CHM, etc
References: <90f2d9db.0401201803.6f2adbf8@posting.google.com>
	<20040120181009.060C.JCARLSON@uci.edu>
	<20040120182610.060F.JCARLSON@uci.edu>
	<100rutd6kge1g9f@corp.supernews.com>
	<20040120203101.3E3B.JCARLSON@uci.edu>
Message-ID: <100s6aoc067q2c4@corp.supernews.com>

> > > Technically os.system("c:\\path\\help.chm") and
> > > os.system("start c:\\path\\help.chm") also work,
> > > though are less intuitive.

> > No, os.system is the wrong way to do it. That function
> > launches a new command shell, which in turn runs
> > the program you want. Because of that, if you're not
> > already running in a console window, it will open a
> > new console window.
> >
> > You had it right with os.startfile. That calls the
> > ShellExecute function in Windows, which is the way
> > you would do it in a native Windows application
> > written in C.

> When the command completes, the window dissappears.
> This is the case when running from a script within
> pythonw or even inside of a py2exe frozen module.  While
> it may not be the 100% correct way of doing things (and
> you have to properly escape spaces in the file name, which
> then results in having to give a window title, etc.), it does
> result in a final outcome that is the same - the help file is
> open, your program continues execution.
>
> Certainly he will be using os.startfile(), but knowing that
> you can use windows shell commands with os.system
> can be useful.

Hi Josiah,

Yes, it is definitely useful to know that you can use os.system to run
Windows shell commands. That's what os.system is meant for. But you really
wouldn't want to use it to run a GUI app such as the HTML Help viewer.

If your application's Help menu opens a spurious console window along with
the help viewer, your users will wonder what the heck is going on. :-) It
also takes more memory and other resources, but that's less significant than
the user experience.

So do it the right way, with os.startfile. Or if you want more control over
the exact parameters to the underlying ShellExecute function, you can use
win32api.ShellExecute (if you know that the win32api module will be
available on the target systems).

-Mike




From martin at v.loewis.de  Sun Jan  4 06:48:09 2004
From: martin at v.loewis.de (Martin v. Loewis)
Date: Sun, 04 Jan 2004 12:48:09 +0100
Subject: [Python-Dev] PEP 324: popen5 - New POSIX process module
In-Reply-To: <Pine.LNX.4.44.0401041008420.6860-100000@aristocat.lysator.liu.se>
References: <Pine.LNX.4.44.0401041008420.6860-100000@aristocat.lysator.liu.se>
Message-ID: <3FF7FD79.5000209@v.loewis.de>

Peter Astrand wrote:
> The popen* stuff for Windows (and OS2 etc) in posixmodule.c is complicated 
> because:
> 
> 1) It's written in low-level C
> 
> 2) It contains lots of old DOS stuff

Such code could be eliminated now; DOS is not supported anymore.
Would you like to contribute a patch in that direction?

Regards,
Martin




From no at spam.edu  Fri Jan 30 18:46:52 2004
From: no at spam.edu (Doug Holton)
Date: Fri, 30 Jan 2004 17:46:52 -0600
Subject: mod_speling for python
In-Reply-To: <bvefja$919$2@news.service.uci.edu>
References: <9d1c4d6d.0401282106.d69b2c5@posting.google.com>	<bvd514$3bv$1@news.service.uci.edu>
	<mailman.1035.1075466324.12720.python-list@python.org>
	<bvefja$919$2@news.service.uci.edu>
Message-ID: <bveqda$838$1@news.vanderbilt.edu>


>> I didn't interpret the OP's question as wanting to automatically map 
>> Foo to
>> foO, but to give the user a more helpful error message, suggesting other
>> candidate names which he might have mistyped.

This can be helpful for beginners especially, to catch not only 
capitalization and minor misspellings, but perhaps other minor errors 
too such as being one space off when indenting, or forgetting a colon.

The python compiler module can check syntax, it just isn't all 
documented.  See this example code:
http://mail.python.org/pipermail/python-dev/2000-September/009501.html
See also the tokenize module:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52298
Or you might go so extreme as metaprogramming and language parsing. See 
PLY: http://systems.cs.uchicago.edu/ply/ and http://gnosis.cx/TPiP/


From naren at trillium.com  Thu Jan  8 21:38:25 2004
From: naren at trillium.com (Narendra C. Tulpule)
Date: 8 Jan 2004 18:38:25 -0800
Subject: Python equivalent of settimeofday()?
Message-ID: <781faf41.0401081838.10de95c9@posting.google.com>

Hi,
  do you know how (or if) I can set time on a system using Python?
i.e. is there an equivalent of the shell's 'date -s' or the system
call settimeofday()?
Thanks -
-- Naren.


From reply.in.the.newsgroup at my.address.is.invalid  Sat Jan 10 10:54:07 2004
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Sat, 10 Jan 2004 16:54:07 +0100
Subject: Databases: Which one's right for me?
References: <4378fa6f.0401091717.1ae63541@posting.google.com>
Message-ID: <qu7000dot866j3qd9hi6hgkh4np5nuq7fa@4ax.com>

Marc:
>Basically I need a db that will travel with my executable script and
>faithfully store and edit the data needed in that script.

Have a look at ZODB.

Introduction:
http://www.python.org/workshops/2000-01/proceedings/papers/fulton/zodb3.html

Programming guide (PDF):
http://cvs.zope.org/ZODB3/Doc/zodb.pdf?rev=1.3

-- 
Ren? Pijlman


From swalters_usenet at yahoo.com  Mon Jan  5 13:31:50 2004
From: swalters_usenet at yahoo.com (Samuel Walters)
Date: Mon, 05 Jan 2004 18:31:50 GMT
Subject: Scripting C++ Game AI object using Python Generators
References: <bt8tk4$bnu$1@news.service.uci.edu>
Message-ID: <pan.2004.01.05.18.30.34.879667@yahoo.com>

|Thus Spake The_Incubator On the now historical date of Sun, 04 Jan 2004
03:32:11 -0800|
> Where I would like to go from there is to be able to associate a Python
> script with a C++ object, so that on every frame update I could run the
> Python script (which would have functionality implemented as a generator)
> until it yields, then move on to updating the next object, and on the next
> frame, have the generator continue from where it left off.
I have not dabbled with boost, but I like pyrex, and it allows you to
write c++ classes that can run python code.
http://www.cosc.canterbury.ac.nz/~greg/python/Pyrex/

You should at least dig in and skim over the c/python api.  You'll learn a
lot about what pyrex does.  I suggest "The Python Bible"
http://www.amazon.com/exec/obidos/tg/detail/-/0764548077/104-2573336-8032758?v=glance
Of all the documents I've scanned so far, it was the one that I understood
best. YMMV.  It has a kind of cookbook method:  "Here's how you do this,
Here's how you deal with that kind of data, etc"

Sam Walters

-- 
Never forget the halloween documents.
http://www.opensource.org/halloween/
""" Where will Microsoft try to drag you today?
    Do you really want to go there?"""



From rpm1deleteme at direcway.com  Tue Jan  6 21:28:05 2004
From: rpm1deleteme at direcway.com (RPM1)
Date: Tue, 6 Jan 2004 21:28:05 -0500
Subject: YAPLP - Yet Another Python Links Page
References: <8089854e.0401060424.12465fcb@posting.google.com>
Message-ID: <btfqs0$6jlfj$1@ID-203708.news.uni-berlin.de>


"Fuzzyman" <michael at foord.net> wrote in message
news:8089854e.0401060424.12465fcb at posting.google.com...
> As part of a python project I've been working on ( atlantibots -
> www.atlantibots.org.uk )I've collected Python and programming
> links.... for what it's worth I thought I'd make them publicly
> available....
>
> http://www.voidspace.org.uk/coollinks/python_links.shtml
>
> Fuzzyman

Cool site!  Thanks!
Patrick





From francisgavila at yahoo.com  Sun Jan 18 21:11:27 2004
From: francisgavila at yahoo.com (Francis Avila)
Date: Sun, 18 Jan 2004 21:11:27 -0500
Subject: Python Text Adventure Authoring System
References: <bufcp0$h36fj$1@ID-221199.news.uni-berlin.de>
Message-ID: <100mf8ial58jf57@corp.supernews.com>

Zachary wrote in message ...
>I have already seen another text adventure development system written in
>Python, called Paws.  I thought this would be a sort of first project.

I don't want to stop you, but I warn you that developing a system like this
is far more complex than you think.

Take a look at PAWS, and after that some of the mechanisms in the language
Inform.  Studying another language specifically designed for text-adventure
authoring will give you an idea of the mechanisms involved, particularly in
grammar and parsing, where a lot of things are needed that you might not
otherwise think of.
--
Francis Avila



From fowlertrainer at anonym.hu  Mon Jan  5 11:03:45 2004
From: fowlertrainer at anonym.hu (fowlertrainer at anonym.hu)
Date: Mon, 5 Jan 2004 17:03:45 +0100
Subject: Sorry, again: Module Loading Problem
In-Reply-To: <16129653189.20040105164050@anonym.hu>
References: <E1AdV6k-0000B0-7v@mail.python.org>
	<16129653189.20040105164050@anonym.hu>
Message-ID: <4731027244.20040105170345@anonym.hu>

 Hello !

 I have used mod_python. But it is don't reload my modules when I
 editing them.

 I try with this:
 --------------------
 # Module importer
 import os
 import traceback
 import kinterbasdb
 import sys
 import time
 import threading
 import imp
 import stat

 ImpLock=threading.Lock()
 IModuleDir="C:/bhaweb/modules"
 IModules={}

 def LoadModule(ModName):
     fp, pathname, description = imp.find_module(ModName)
     try:
       mod=imp.load_module(ModName, fp, pathname, description)
       print mod
       sys.modules[ModName]=mod
     finally:
       # Since we may exit via an exception, close fp explicitly.
       if fp: fp.close()

 def ImportModules(Modules):
     ImpLock.acquire()
     try:
         if not (IModuleDir in sys.path): sys.path.append(IModuleDir)
         # Do imports, if needed
         print Modules
         for m in Modules:
             sf=IModuleDir+"/"+m+".py"
             if sys.modules.has_key(m):
                sd=os.stat(sf)
                lm=sd[stat.ST_MTIME]
                if IModules.has_key(m):
                   dd=IModules[m]
                   if (dd<>lm):
                      print "ReLoad"
                      reload(sys.modules[m])
                IModules[m]=lm
             else:
                print "Load"
                LoadModule(m)
                sd=os.stat(sf)
                lm=sd[stat.ST_MTIME]
                IModules[m]=lm
             '''
             import s
             sf=IModuleDir+"/"+s


             '''
         print IModules
     finally:
         ImpLock.release()

 #for k in sys.modules.keys(): print k,sys.modules[k]
 '''
 f=file(IModuleDir+"/test.py","w")
 f.write("print 1")
 f.close()
 '''
 #print os.stat(IModuleDir+"/test.py")[stat.ST_MTIME]
 #sys.exit()
 '''
 ImportModules(["test"])
 f=file(IModuleDir+"/test.py","w")
 f.write("print 2")
 f.close()
 time.sleep(2)
 ImportModules(["test"])
 '''
 ImportModules(["test"])
 test.test()
 --------------------
 test.py is this:
 def test():
     print 1
 --------------------
 But python is say:

> Executing: C:\Program Files\ConTEXT\ConExec.exe
> "C:\Python\python.exe" "C:\bhaweb\modules\ModImport.py"

 ['test']
 Load
 <module 'test' from 'C:\bhaweb\modules\test.pyc'>
 {'test': 1073316581}
 Traceback (most recent call last):
   File "C:\bhaweb\modules\ModImport.py", line 75, in ?
     test.test()
 NameError: name 'test' is not defined
> Execution finished.

 I run this in native mode, but do this in under mod_apache also.

 Why ? What I do wrong ?
 Plase send the email in private also, because I'm in digest mode.

 Thanx:
  KK






-- 
Best regards,
 fowlertrainer                            mailto:fowlertrainer at anonym.hu




From python at hitmedia.com  Fri Jan 23 13:31:27 2004
From: python at hitmedia.com (Python Baby)
Date: Fri, 23 Jan 2004 10:31:27 -0800
Subject: [OPINION] - does language really matter if they all do the same
	thing?
Message-ID: <20040123183127.GA35281@mail.hitmedia.com>

Are programming languages like spoken languages, in the sense
that they all say the same things, just using different words?

Like many PHP people, I was never a "real" programmer, but just
picked up PHP as my HTML websites started to mature.  Now that
even my PHP sites have grown, (50,000 lines of PHP!), I got
interested in object-oriented approach.  Since my old website
needed an overhaul anyway, I thought it'd be a good time to learn.

I start learning Ruby.  Then Python.  Wondering if, since I'm 
about to re-write my entire website anyway, if I should use
Ruby or Python instead of PHP.

As I've fretted over this for way too many hours, I started wondering:

Can Ruby do something (important) that Python can't?
Can Python do something (important) that PHP can't?
Can PHP do something (important) that Ruby or Python can't?

Are they all just the same, and it's just a matter of taste?

Should I stick with PHP for the same reason that pop singers
worldwide sing in English for maximum compatibility with the medium?

Though PHP wasn't design for OOP should I use it that way anyway?

Any opinions on the subject, from people that know and use many
languages, would be appreciated.




From jsbenson at bensonsystems.com  Wed Jan 28 21:53:37 2004
From: jsbenson at bensonsystems.com (John Benson)
Date: Wed, 28 Jan 2004 18:53:37 -0800
Subject: Oracle db connection problem solved
Message-ID: <031f01c3e613$17f364e0$6309500a@jsbwxp3>

Thanks much for help with the Oracle db connection problem. That, plus some
local assistance getting the sqlnet.ora default domain right, got everything
fixed. Now I'm connected, and have been able to retrieve information from
Oracle into my PC Python session.

I seem to see a lot of advice asking people to google before submitting a
problem to the list. This was nicely illustrated by the suggestion to google
on the verbatim Oracle database error code. I was amazed to see all the
stuff it brought up, and I'll certainly add googling for even proprietary
error codes to my bag of tricks.

Thanks again.





From hans at zephyrfalcon.org  Sun Jan 25 19:28:16 2004
From: hans at zephyrfalcon.org (Hans Nowak)
Date: Sun, 25 Jan 2004 19:28:16 -0500
Subject: xrange not hashable - why not?
In-Reply-To: <20040126001145.GB2593@unpythonic.net>
References: <20040125144724.GA13741@nl.linux.org>	<40145A07.2070906@zephyrfalcon.org>
	<20040126001145.GB2593@unpythonic.net>
Message-ID: <40145F20.7070402@zephyrfalcon.org>

Jeff Epler wrote:
> On Sun, Jan 25, 2004 at 07:06:31PM -0500, Hans Nowak wrote:
> 
>>So far, everybody who replied seems to agree or assumes that xrange indeed 
>>isn't hashable.  However:
> 
> [...]
> 
> It wasn't in older versions:
> $ python
> Python 2.2.2 (#1, Feb 24 2003, 19:13:11) 
> [GCC 3.2.2 20030222 (Red Hat Linux 3.2.2-4)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
> 
>>>>hash(xrange(0))
> 
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> TypeError: unhashable type

Huh.  This is really weird:

(C:\) $ python22
Python 2.2.2 (#37, Oct 14 2002, 17:02:34) [MSC 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
 >>> hash(xrange)
503376880

(C:\) $ \Python21\python.exe
Python 2.1 (#15, Apr 16 2001, 18:25:49) [MSC 32 bit (Intel)] on win32
Type "copyright", "credits" or "license" for more information.
 >>> hash(xrange)
504420928

(C:\) $ \python152\python.exe
Python 1.5.2 (#0, Apr 13 1999, 10:51:12) [MSC 32 bit (Intel)] on win32
Copyright 1991-1995 Stichting Mathematisch Centrum, Amsterdam
 >>> hash(xrange)
504409536

...?!

Maybe it's platform-specific?

Confused-ly y'rs,

-- 
Hans (hans at zephyrfalcon.org)
http://zephyrfalcon.org/




From CousinStanley at hotmail.com  Thu Jan 15 15:33:11 2004
From: CousinStanley at hotmail.com (Cousin Stanley)
Date: Thu, 15 Jan 2004 13:33:11 -0700
Subject: [OT] AS/400
References: <mailman.352.1074092092.12720.python-list@python.org>
	<bu4a5n$k9$6@atlantis.news.tpi.pl> <4005cd03@news.mt.net.mk>
	<bu6l68$8uv$1@atlantis.news.tpi.pl>
Message-ID: <bu6tat$eeheo$1@ID-130333.news.uni-berlin.de>

> Why is it the best minicomputer ever made?
> I really want to know!

| Since nobody ever produced any other. 
| Only IBM produced machines that can be called "midrange" 
| (something between microcomputer and "real computer", 
| the famous S/390 mainframe). They still use this terminology.

Jarek .... 

  Honeywell also produced a line of mid-range machines
  called the  Level 6  minicomputers ....

  These machines ran an operating system 
  which had an internal architecture 
  and command line interface different from, 
  but vaguely similar, to  Multics, a Honeywell mainframe OS ....

  Multics was a major predecessor of Unix, 
  a euphemism for  Multics  Without  Balls 
  deemed so by the original developers themselves ....

  Without Multics there might not be
  any such thing as Unix or Linux .... 

  You can find the history of Multics at ....

      http://www.multicians.org 

-- 
Cousin Stanley
Human Being
Phoenix, Arizona



From danb_83 at yahoo.com  Sun Jan  4 19:59:35 2004
From: danb_83 at yahoo.com (Dan Bishop)
Date: 4 Jan 2004 16:59:35 -0800
Subject: Integer math question
References: <3987e01c.0401030832.114c6f2a@posting.google.com>
Message-ID: <ad052e5c.0401041659.68460bd@posting.google.com>

mersmann at szut.uni-bremen.de (Frank) wrote in message news:<3987e01c.0401030832.114c6f2a at posting.google.com>...
> Hi,
> 
> can anybody help with the following problem?
...
> i = 5 / 10 	gives me 0 as expected, but
> i = -5 / 10 	gives -1 as result.

The problem is that you aren't using "from __future__ import division"
;-)  (This causes the results to be 0.5 and -0.5, and will be the
default division semantics in Python 3.0.  If you want integer
division, use the // operator.)

> Is this a feature or a bug?

It's a feature.  The advantage of defining x // y as floor(x / y) is
that x % y is always nonnegative.

As as example of why this is useful, consider the
datetime.date.weekday method.  This could be implemented as

   def weekday(self):
      return (self.fromordinal() - 1) % 7

If the datetime module was changed to allow BC(E) dates (which have
nonpositive Rata Die numbers), the weekday method would still work. 
In C++, you'd have to treat such dates as a special case.


From hans at zephyrfalcon.org  Fri Jan 23 14:20:22 2004
From: hans at zephyrfalcon.org (Hans Nowak)
Date: Fri, 23 Jan 2004 14:20:22 -0500
Subject: debugging
In-Reply-To: <88bc63c6.0401230416.7acf904c@posting.google.com>
References: <88bc63c6.0401230416.7acf904c@posting.google.com>
Message-ID: <401173F6.8080705@zephyrfalcon.org>

Doug Farrell wrote:
> Hi all,
> 
> Can someone help me out a little with Python? What do people use to
> debug Python code? I don't understand how to use the built in debugger
> and I haven't had any luck getting ddd to debug my Python programs. I
> end up falling back on inserting print statements in my code to figure
> out what's going on. This works but isn't always the fastest route to
> a solution. So, I'm just wondering what other people do.

"The most effective debugging tool is still careful thought, coupled with 
judiciously placed print statements."  -- Brian Kernighan (1978)

The 'print statements' method still works, anno 2004.  Aside from that, I use 
unit tests.  I never use a debugger; I find stepping through code, or breaking 
execution off halfway, rather clumsy.

Just my $0.02,

-- 
Hans (hans at zephyrfalcon.org)
http://zephyrfalcon.org/





From rkern at ucsd.edu  Mon Jan 19 17:10:24 2004
From: rkern at ucsd.edu (Robert Kern)
Date: Mon, 19 Jan 2004 22:10:24 GMT
Subject: Fw: PDF library for reading PDF files
In-Reply-To: <100nlf2b1qjdae2@corp.supernews.com>
References: <mailman.464.1074430854.12720.python-list@python.org>
	<Xns9474CBDE9B2D7cpl19ghumspamgourmet@62.153.159.134>
	<100luvhbh3vr75d@corp.supernews.com>
	<oxEOb.96911$Vs3.36407@twister.socal.rr.com>
	<100nlf2b1qjdae2@corp.supernews.com>
Message-ID: <kBYOb.82135$C87.18971@twister.socal.rr.com>

Cameron Laird wrote:
> In article <oxEOb.96911$Vs3.36407 at twister.socal.rr.com>,
> Robert Kern  <rkern at ucsd.edu> wrote:
> 
>>Cameron Laird wrote:
>>
>>>In article <Xns9474CBDE9B2D7cpl19ghumspamgourmet at 62.153.159.134>,
>>>Harald Massa  <cpl.19.ghum at spamgourmet.com> wrote:
>>>
>>>
>>>>>I am looking for a library in Python that would read PDF files and I
>>>>>could extract information from the PDF with it. I have searched with
>>>>>google, but only found libraries that can be used to write PDF files. 
>>>>
>>>>reportlab has a lib called pagecatcher; it is fully supported with python, 
>>>>it is not free.
>>>>
>>>>Harald
>>>
>>>
>>>ReportLab's libraries are great things--but they do not "extract
>>>information from the PDF" in the sense I believe the original
>>>questioner intended.  
>>
>>No, but ReportLab (the company) has a product separate from reportlab 
>>(the package) called PageCatcher that does exactly what the OP asked 
>>for. It is not open source, however, and costs a chunk of change.
> 
> 
> Let's take this one step farther.  Two posts now have
> quite clearly recommended ReportLab's PageCatcher <URL:
> http://reportlab.com/docs/pagecatcher-ds.pdf >.  I
> completely understand and agree that ReportLab supports
> a mix of open-source, no-fee, and for-fee products, and
> that PageCatcher carries a significant license fee.  I
> entirely agree that PageCatcher "read[s] PDF files ...
> and ... extract[s] information from the PDF with it."
> 
> HOWEVER, I suspect that what the original questioner
> meant by his words was some sort of PDF-to-text "extrac-
> tion" (true?) and, unless PageCatcher has changed a lot
> since I got my last copy, PDF-to-text is NOT one of its
> functions.  

Rereading http://www.reportlab.com/PageCatchIntro.html , you're right. 
My apologies. I thought you were talking about the open source reportlab 
package and not PageCatcher specifically.


From stadt at borbala.com  Sat Jan 24 11:23:37 2004
From: stadt at borbala.com (Richard van de Stadt)
Date: Sat, 24 Jan 2004 17:23:37 +0100
Subject: Sending e-mail with python 1.5.2
References: <fM6PlaqxCD+$EwGQ@at-andros.demon.co.uk>
Message-ID: <40129C09.F153F3D2@borbala.com>

Andrew McLean wrote:
> 
> I am writing a CGI script on an account that only has Python 1.5.2. It's
> principal purpose is to take some user input from a form, do some
> manipulation and return some information to the user. However, I would
> also like it to send some information to an e-mail account (behind the
> scenes).
> 
> The e-mail could be quite simple, but I wouldn't rule out wanting to
> send a pickled object or two.
> 
> Now if I was using a recent Python I would just use the email package,
> but I don't think it's compatible with v1.5.2. I know I have access to
> the sendmail binary, so something should be possible. Any pointers
> gratefully received.
> 
> --
> Andrew McLean

This should help to get you going:

message = """\
Message-ID: <%(messageID)s>
Subject: %(subject)s
Date: %(date)s
From: %(fromstring)s <%(fromaddr)s>
Reply-To: %(fromaddr)s
X-Mailer: Python smtplib
%(to_cc_list)s

%(body)s
"""
try:
    mail = smtplib.SMTP(LocalMailServer)
    #mail.set_debuglevel(1)
    mail.sendmail(fromaddr, email_recipients_tuple, message % locals())
    mail.quit()
except:
    print 'Could not send email!'

---

Richard.


From swalters_usenet at yahoo.com  Sun Jan 18 06:31:53 2004
From: swalters_usenet at yahoo.com (Samuel Walters)
Date: Sun, 18 Jan 2004 11:31:53 GMT
Subject: Forums for Teachers Using Python - Where are they?
Message-ID: <pan.2004.01.18.11.30.20.988949@yahoo.com>


I'm currently considering a position teaching math and possibly
programming at a small local magnet school.  If I was also teaching
programming, I would, of course, be using Python.

So, I went out and googled around for resources.  I found lots of articles
about using Python to teach programming, but I have yet to turn up one
forum where teachers using Python talk amongst themselves.

Can anyone point me to such a resource, or, at least any "Must Read"
articles that I might have missed?

Also, does anyone have any experience using "Thinking Like A Computer
Scientist" as a textbook?  Does it fit well within a single semester?  If
not, how far were you able to make it into the book?

Thanks for any advice.

Sam Walters.

P.S.  An thought provoking general interest paper about computers in
education is here:
http://www.cs.berkeley.edu/~bh/stop.html

It was written 21 years ago and still raises a relevant question.

-- 
Never forget the halloween documents.
http://www.opensource.org/halloween/
""" Where will Microsoft try to drag you today?
    Do you really want to go there?"""



From amy-g-art at cox.net  Fri Jan 23 15:41:39 2004
From: amy-g-art at cox.net (Amy G)
Date: Fri, 23 Jan 2004 12:41:39 -0800
Subject: Various strings to dates.
Message-ID: <4GfQb.16187$AA6.14368@fed1read03>

I have seen something about this beofore on this forum, but my google search
didn't come up with the answer I am looking for.

I have a list of tuples.  Each tuple is in the following format:

("data", "moredata", "evenmoredata", "date string")

The date string is my concern.  This is the date stamp from an email.
The problem is that I have a whole bunch of variations when it comes to the
format that the date string is in.  For example I could have the following
two tuples:

("data", "moredata", "evenmoredata", "Fri, 23 Jan 2004 00:06:15")
("data", "moredata", "evenmoredata", "Thursday, 22 January 2004 03:15:06")

I know there is some way to use the date string from each of these to get a
date usable by python, but I cannot figure it out.
I was trying to use time.strptime but have been unsuccesful thus far.

Any help is appreciated.




From buzzard at urubu.freeserve.co.uk  Sat Jan 31 10:49:47 2004
From: buzzard at urubu.freeserve.co.uk (Duncan Smith)
Date: Sat, 31 Jan 2004 15:49:47 -0000
Subject: timeit
References: <mailman.1071.1075531877.12720.python-list@python.org>
Message-ID: <bvgihb$arh$1@newsg3.svr.pol.co.uk>


"Robert Brewer" <fumanchu at amor.org> wrote in message
news:mailman.1071.1075531877.12720.python-list at python.org...
Duncan Smith wrote:
> >>> import SDC_table
> >>> import subtract
> >>> import timeit
> >>> t = SDC_table.RandomTable(1, 12, (2,3,4))
> >>> s = """\
> p = subtract.p_risk(t.values, 10)
> """
> >>> tim = timeit.Timer(stmt=s)
> >>> tim.timeit(10)
>
> Traceback (most recent call last):
>   File "<pyshell#119>", line 1, in -toplevel-
>     tim.timeit(10)
>   File "C:\Python23\lib\timeit.py", line 158, in timeit
>     return self.inner(it, self.timer)
>   File "<timeit-src>", line 6, in inner
> NameError: global name 'subtract' is not defined
>
> # yet
> >>> exec(s)
> >>> p
> 0.242621453769059

I believe you need to put *any* initialization code (like "import
subtract") into the "setup" parameter to Timer(). So try something like:

> >>> import timeit
> >>> s = """p = subtract.p_risk(t.values, 10)"""
> >>> tim = timeit.Timer(stmt=s, setup="import SDC_table, subtract; t =
SDC_table.RandomTable(1, 12, (2,3,4))")
> >>> tim.timeit(10)

That does the job.  Cheers.

Duncan




From tchur at optushome.com.au  Thu Jan  8 17:03:03 2004
From: tchur at optushome.com.au (Tim Churches)
Date: 09 Jan 2004 09:03:03 +1100
Subject: [OT] Database reporting software
In-Reply-To: <btki05$7d0$1@news.freedom2surf.net>
References: <btki05$7d0$1@news.freedom2surf.net>
Message-ID: <1073599383.1866.59.camel@emilio>

On Fri, 2004-01-09 at 08:32, Steve Horsley wrote:
> I have an existing system working on MS Access, and software that 
> regularly logs events into it (and deletes old events after a year).
> 
> Now need to move to real servers, probably Solaris though possibly 
> Linux. Modifying the software to update the database (maybe mySQL or 
> Oracle) contents is easy enough, but how do I produce reports 
> (statistics and summaries) on the database contents?
> 
> I could contemplate web based or application based report generation, 
> but are there easy to use draggy-droppy report designing applications 
> around? Just the names would enable me to look them up.

Have a look at the GPLed version(s) of Rekall, which is a cross-platform
semi-clone of MS Access. Still somewhat buggy, I have found, but
definitely usable. And Rekall is programmed in Python, not Visual Basic.
Bliss!

> I am struggling with OpenOffice.org at the moment, trying to see if it 
> can do what I'm looking for, but it doesn't seem to be able to do GROUP 
> BY and SUM() - simple aggregation stuff.

Yup, you probably need to do those in your database back-end first. But
as a line-listing or report formatter (if the data manipulation and
aggregation is done beforehand), OpenOffice has quite a lot to recommend
it,particularly if integration with text commentary is required. And it
too is drivable with Python (albeit somewhat painfully and slowly via
PyUNo - but it does work). Suggest you look at Rekall, though.

-- 

Tim C

PGP/GnuPG Key 1024D/EAF993D0 available from keyservers everywhere
or at http://members.optushome.com.au/tchur/pubkey.asc
Key fingerprint = 8C22 BF76 33BA B3B5 1D5B  EB37 7891 46A9 EAF9 93D0


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From james at logicalprogression.net  Fri Jan 16 11:13:06 2004
From: james at logicalprogression.net (James Henderson)
Date: Fri, 16 Jan 2004 16:13:06 +0000
Subject: Bug or feature?
In-Reply-To: <bu8t4h$15d$1@news.rtcomm.ru>
References: <bu58st$1ha3$1@news.rtcomm.ru> <ZvidncM7G8svuZrdRVn-jA@comcast.com>
	<bu8t4h$15d$1@news.rtcomm.ru>
Message-ID: <200401161613.06481.james@logicalprogression.net>

On Friday 16 January 2004 2:44 pm, Alexey Nezhdanov wrote:
<snip>
> I know the case where such python behaivoir causes hard-to-catch problems.
> I do not know any case (anybody knows? please give example) where such
> "feature" may be useful.
>
> So I proposing to make a change into python and reverse the order of
> calculations.
> Just for sure:
> === Order used now ===
> ## a+=a.Sub(b)
> 1. evaluate value of 'a'
> 2. evaluate value of 'a.Sub(b)'
> 3. evaluate the sum
> 4. store the result into 'a'
> === Proposed order ===
> ## a+=a.Sub(b)
> 1. evaluate value of 'a.Sub(b)'
> 2. evaluate value of 'a'
> 3. evaluate the sum
> 4. store the result into 'a'

-1
In any language that uses such an operator I would expect:

a += b

to be synonymous with:

a = a + b

You are suggesting that it should mean:

a = b + a

It is not like Python to attach its own idiosyncratic semantics to operators 
already well known from other languages.  I think this would catch a lot of 
people out.

Of course, it's probably best to avoid writing code where the order makes a 
difference. :)

James
-- 
James Henderson, Logical Progression Ltd.
http://www.logicalprogression.net/




From gerrit at nl.linux.org  Sun Jan  4 14:46:37 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Sun, 4 Jan 2004 20:46:37 +0100
Subject: Proposal: new peps always in clpa
In-Reply-To: <bt9pm9$rhf$1@panix2.panix.com>
References: <mailman.80.1073238516.12720.python-list@python.org>
	<bt9pm9$rhf$1@panix2.panix.com>
Message-ID: <20040104194637.GA16882@nl.linux.org>

Aahz wrote:
> In article <mailman.80.1073238516.12720.python-list at python.org>,
> Gerrit Holl  <gerrit at nl.linux.org> wrote:
> >would it be a good idea to automatically sumbit all new peps to
> >comp.lang.python.announce? After all, each PEP is an announcement and
> >may be important to the entire Python community. Another possibility
> >would be to python-dev, but since c.l.py.announce has a broader public,
> >I'd prefer the first one. What do you think?
> 
> That's a good idea, but c.l.py.announce needs to have its Followup-To:
> set to c.l.py.  I think I asked for that once before, but didn't get a
> response.

I think Followup-To: should be set to c.l.py for _any_ posting in
c.l.py.announce, not only for peps, but that is another issue
altogether.

Gerrit.

-- 
256. If his community will not pay for him, then he shall be placed in
that field with the cattle (at work).
          -- 1780 BC, Hammurabi, Code of Law
-- 
Asperger's Syndrome - a personal approach:
	http://people.nl.linux.org/~gerrit/english/



From ralsina at my-deja.com  Wed Jan 14 22:24:08 2004
From: ralsina at my-deja.com (Roberto Alsina)
Date: 14 Jan 2004 19:24:08 -0800
Subject: PyQT: qt.qApp
References: <bu3pph$qma$01$1@news.t-online.com>
Message-ID: <bae891f2.0401141924.717cbaeb@posting.google.com>

"Axel Mittendorf" <newsreply at transfertech.de> wrote in message news:<bu3pph$qma$01$1 at news.t-online.com>...
> Hello,
> in my application I want to subclass qt.QApplication and
> use this subclass instead of QApplication for my gui. Some
> of my modules are automatically generated by pyuic and
> I am not allowed to change their source code. The problem
> is these modules do "from qt import *" and use an object
> called 'qApp' which seems to be an instance of qt.QApplication
> and I want them to use my subclass (exactly its instance)
> instead of 'qApp'. How can I solve this?
> 
> Can someone tell me what qt.qApp is and what it is used for?
> (I'm using PyQT 3.6.)

Well, there are some times when you need to call a method of
QApplication.

For example, if you want to put a hourglass cursor for the whole app,
you call
qApp.setOverrideCursor

Anyway, you shouldn?t worry about this. Whatever object you create
that inherits QApplication will be qApp. Since there can only be one
of those, there is no way it?s gonna get confused ;-)

-- 
Roberto Alsina


From faizan at jaredweb.com  Thu Jan  8 10:03:33 2004
From: faizan at jaredweb.com (Fazer)
Date: 8 Jan 2004 07:03:33 -0800
Subject: Time-controlled execution?
References: <7b454334.0401071421.53a8cebb@posting.google.com>
	<7xsmirtn2i.fsf@ruckus.brouhaha.com>
Message-ID: <7b454334.0401080703.690259a5@posting.google.com>

Paul Rubin <http://phr.cx at NOSPAM.invalid> wrote in message news:<7xsmirtn2i.fsf at ruckus.brouhaha.com>...
> faizan at jaredweb.com (Fazer) writes:
> > Lets say that I need to open a large file in Python.  However, I only
> > want this operation to take no more than four seconds.  If it takes
> > longer than four seconds to open this file, abort the process.  How
> > can I do this?
> 
> http://python.org/doc/current/lib/node304.html

Perfect!  Thanks a lot!


From crap at crud.com  Thu Jan 15 22:52:40 2004
From: crap at crud.com (Moosebumps)
Date: Fri, 16 Jan 2004 03:52:40 GMT
Subject: working on multiple files in IDLE
Message-ID: <ceJNb.1610$Z6.646@newssvr29.news.prodigy.com>

So say I am working on two separate .py files in IDLE that are part of the
same program.  Does anyone have problems where when you modify one file, and
then run the other, the changes you made in the first aren't updated?

I usually just close all the files, and restart IDLE, but this is a pain.
Maybe because I always use right click -> edit with IDLE (on Windows).  That
starts up a separate Python Shell too, which I always close.

MB




From sombDELETE at pobox.ru  Sun Jan  4 17:19:29 2004
From: sombDELETE at pobox.ru (Serge Orlov)
Date: Mon, 5 Jan 2004 01:19:29 +0300
Subject: Creating a capabilities-based restricted execution system
References: <LmmdnUn4seDeGWuiXTWc-w@speakeasy.net> <bt788l$1pej$1@nadya.doma>
	<d7ycncKp5rket2qiXTWc-g@speakeasy.net> <bt7i9i$236v$1@nadya.doma>
	<srudnTjvU9BOH2qiRVn-uA@speakeasy.net>
Message-ID: <bta3hv$17s1$1@nadya.doma>


"Sean R. Lynch" <seanl at chaosring.org> wrote in message news:srudnTjvU9BOH2qiRVn-uA at speakeasy.net...
> Ok, I think you've pretty much convinced me here. My choices for
> protected attributes were to either name them specially and only allow
> those attribute accesses on the name "self" (which I treat specially),
> or to make everything protected by default, pass all attribute access
> through a checker function (which I was hoping to avoid), and check for
> a special attribute to define which attributes are supposed to be
> public. Do you think it's good enough to make all attributes protected
> as opposed to private by default?

Are you talking about C++ like protected fields and methods? What if
untrusted code subclasses your proxy object?

> > I'm not sure how to deal with str.encode too. You don't know what
> > kind of codecs are registered for that method for sure, one day there
> > could be registered an unknown codec that does something unknown.
> > Shouldn't you have two (or several) codecs.py modules(instances?)
> > for trusted and untrusted code? And str.encode should be transparently
> > redirected to the proper one?
>
> I guess I'll just make attributes protected by default, and force the
> programmer to go out of their way to make things public. Then I can use
> the Zope/RestrictedPython technique of assuming everything is insecure
> until proven otherwise, and only expose parts of the interface on
> built-in types that have been audited.

Thinking about str.encode I conviced myself that global state shouldn't
be shared by different security domains so that means codecs.py and
__builtins__ must be imported into each security domain separately.
It's pretty easy to do with codecs.py since it's python code. But importing
__builtins__ more than once is pretty hard since it wasn't designed
for that.

-- Serge.




From FBatista at uniFON.com.ar  Mon Jan  5 12:23:43 2004
From: FBatista at uniFON.com.ar (Batista, Facundo)
Date: Mon, 5 Jan 2004 14:23:43 -0300 
Subject: Get UID of username
Message-ID: <A128D751272CD411BC9200508BC2194D03383437@escpl.tcp.com.ar>


Florian Lindner wrote:

#- Hello,
#- how can I find out the UID of a username on a linux system?

Use the password database module:

http://www.python.org/doc/current/lib/module-pwd.html

.	Facundo





. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . .
ADVERTENCIA  

La informaci?n contenida en este mensaje y cualquier archivo anexo al mismo,
son para uso exclusivo del destinatario y pueden contener informaci?n
confidencial o propietaria, cuya divulgaci?n es sancionada por la ley. 

Si Ud. No es uno de los destinatarios consignados o la persona responsable
de hacer llegar este mensaje a los destinatarios consignados, no est?
autorizado a divulgar, copiar, distribuir o retener informaci?n (o parte de
ella) contenida en este mensaje. Por favor notif?quenos respondiendo al
remitente, borre el mensaje original y borre las copias (impresas o grabadas
en cualquier medio magn?tico) que pueda haber realizado del mismo. 

Todas las opiniones contenidas en este mail son propias del autor del
mensaje y no necesariamente coinciden con las de Telef?nica Comunicaciones
Personales S.A. o alguna empresa asociada. 

Los mensajes electr?nicos pueden ser alterados, motivo por el cual
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Muchas Gracias.
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From p at trick.lu  Fri Jan 23 14:31:46 2004
From: p at trick.lu (Patrick Useldinger)
Date: Fri, 23 Jan 2004 20:31:46 +0100
Subject: C compilers
References: <X59Qb.20838$q4.11416@newsread3.news.atl.earthlink.net>
Message-ID: <qjt210lr869li9fbvicurb39kfm2g0ahhu@4ax.com>

On Fri, 23 Jan 2004 13:13:27 GMT, "Lucas Raab" <pythongnome at hotmail.com>
wrote:

>I realize that this is a Python newsgroup, but do any of you know any good
>C/C++ compilers?? I'm interested in imbedding C with Python.
>
>Thanks
>

Borland C++ 5 - and it's free.

--
http://www.homepages.lu/pu/


From candiazoo at comcast.net  Tue Jan  6 02:13:40 2004
From: candiazoo at comcast.net (Zoo Keeper)
Date: Tue, 06 Jan 2004 07:13:40 GMT
Subject: Beginner question - How to effectively pass a large list
References: <brjn1d$hg9$1@newshost.mot.com>
	<3fde309f$0$19285$626a54ce@news.free.fr>
	<donn-02CC52.16050615122003@nntp3.u.washington.edu>
	<brmf9g$t59$1@newshost.mot.com>
	<donn-9E0285.10012616122003@nntp1.u.washington.edu>
	<broje1$abb$1@newshost.mot.com>
	<38ec68a6.0312181529.729b654@posting.google.com>
	<mailman.331.1071795996.9307.python-list@python.org>
	<1071900300.434091@yasure>
	<38ec68a6.0401052235.2c223dca@posting.google.com>
Message-ID: <EetKb.755741$Tr4.2148113@attbi_s03>

Ouch!  That sounds painful!  ;)

> Re: Beginner question - How to effectively pass a large list



From gagenellina at softlab.com.ar  Fri Jan  2 20:25:55 2004
From: gagenellina at softlab.com.ar (Gabriel Genellina)
Date: Fri, 02 Jan 2004 22:25:55 -0300
Subject: Multiple exception syntax
In-Reply-To: <bt3bqr$j84$1@news-reader5.wanadoo.fr>
Message-ID: <5.2.1.1.0.20040102222218.02429a90@192.168.0.115>

At 2/1/2004 09:58, you wrote:

>Normally in Python there is no need to write parenthesis for a tuple :
>a,b,c=(1,2,3)
>(a,b,c)=1,2,3
>
>are the same, and so are :
>
>for (x,y) in enumerate(aList)
>for x,y in enumerate(aList)
>
>But with "except" the behaviour is very different with or without
>parenthesis :
>- "except x,y" means : if exception x is raised, then y is the instance of
>the x class holding information about the exception
>- "except (x,y)" means : if one of the exceptions x or y is raised (or both)
>
>So it took me some time to figure out why this code was wrong :

I've been hit by the same error a couple of times.


>I find this confusing. It would be clearer for me to have :
>
>"except Error1 or Error2 or Error3"

I agree.


Gabriel Genellina
Softlab SRL




From mir4uu at yahoo.com  Sat Jan 17 12:03:56 2004
From: mir4uu at yahoo.com (mir nazim)
Date: 17 Jan 2004 09:03:56 -0800
Subject: needed PyXPCOM tutorial.
References: <425cc8d1.0401150908.287de0d8@posting.google.com>
	<mailman.415.1074196966.12720.python-list@python.org>
Message-ID: <425cc8d1.0401170903.3c331ab9@posting.google.com>

Christoph Becker-Freyseng <christoph at mmc-startup.com> wrote in message news:<mailman.415.1074196966.12720.python-list at python.org>...
> mir nazim wrote:
> 
> >hi 
> >i m in need of a PyXPCOM tutorial. it should explain using python
> >(instead of JavaScript) for creating apps. if any body can point me to
> >some web resources or a printed book .
> >thankz
> >  
> >
> Maybe those will help (check 3! They've some more links)
> 
> http://lxr.mozilla.org/seamonkey/source/extensions/python/xpcom/
> http://www.mozilla.org/catalog/architecture/xpcom/pyxpcom/
> http://pygecko.sourceforge.net/
> http://xul.sourceforge.net/
> http://luxor-xul.sourceforge.net/
> http://www.thomas-schilz.de/MozPython/    (the downloads-dirctory 
> contains installers for upgrading Mozilla to Python-Interpretability)
> 
> 
> 
> Christoph Becker-Freyseng

yeah i know about them all
but what i acutally need is an indepth tutorial/guide/refrence.


From reply.in.the.newsgroup at my.address.is.invalid  Fri Jan 16 06:23:22 2004
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Fri, 16 Jan 2004 12:23:22 +0100
Subject: python mode vi
References: <mailman.426.1074247028.12720.python-list@python.org>
Message-ID: <5dif00pi2rs0cp3qh3o40r7gvfe1ep11d8@4ax.com>

km:
> how to invoke python mode in vi editor ? 

http://www.python.org/editors/config.html

-- 
Ren? Pijlman


From necromancer_stupidspambot at quanta1.world-vr_stupidspambot.com  Thu Jan 22 23:13:56 2004
From: necromancer_stupidspambot at quanta1.world-vr_stupidspambot.com (necromancer_stupidspambot at quanta1.world-vr_stupidspambot.com)
Date: Thu, 22 Jan 2004 23:13:56 -0500
Subject: get "yesterday's" date in iso format
Message-ID: <pan.2004.01.23.04.13.55.406832@quanta1.world-vr_stupidspambot.com>

Hi,

I am trying to find a simple way to get "yesterday's" date.  I know I can
build various check to seee if we are in leap year, if we are the 1st then
yesterday is the 31(or 30 depending of the month) etc. but there is got to
be a simpler way than that. I was thinking of using the gmtime (field 7 as
you can see int the code)then substract one, then use strptime to rebuild
the time but it doesn't work(probably because I misunderstood strptime):

improt time
gmt = time.gmtime()
yesterdaytime = str(int(gmt[7]) - 1)
print gmt[7]
print yesterdaytime
newtime = time.strptime(yesterdaytime,'%j')
print newtime
(1900, 1, 22, 0, 0, 0, 0, 22, -1)

can someone enlighten me please?

Thanks
David



From sombDELETE at pobox.ru  Sun Jan 25 03:54:17 2004
From: sombDELETE at pobox.ru (Serge Orlov)
Date: Sun, 25 Jan 2004 11:54:17 +0300
Subject: trouble w/ unicode file
References: <mailman.752.1074995324.12720.python-list@python.org>
Message-ID: <bv007p$2ged$1@nadya.doma>


"Guilherme Salgado" <salgado at freeshell.org> wrote in message news:mailman.752.1074995324.12720.python-list at python.org...
> Hi there,
>
> I have a python source file encoded in unicode(utf-8) with some
> iso8859-1 strings. I've encoded this file as utf-8 in the hope that
> python will understand these strings as unicode (<type 'unicode'>)
> strings whithout the need to use unicode() or u"" on these strings. But
> this didn't happen.

You hoped, but you forgot to pray <wink> Why do you think Python
should behave this way? There is (an experimental?) option -U that
forces all string literals to be unicode. Obviously if you use this option
your sources won't be easily distributable to other people

C:\Python23>python -U
Python 2.3.3 (#51, Dec 18 2003, 20:22:39) [MSC v.1200 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> type('a')
<type 'unicode'>

> Am I expecting something that really shoudn't happen or we have a bug?

We have a bug here as well. But in your code. The coding must
be the same as the coding of your source file. bar.py must be:
#-*- coding: latin-1 -*-
x = '????????????'
print x, type(x)

-- Serge.




From paul at boddie.net  Thu Jan 29 05:35:21 2004
From: paul at boddie.net (Paul Boddie)
Date: 29 Jan 2004 02:35:21 -0800
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<n22Nb.11299$9k7.210522@news.xtra.co.nz>
	<bu2pgs$d123a$1@ID-207230.news.uni-berlin.de>
	<4004EC9E.1E2E2893@alcyone.com> <bu3iv2$n2u$4@tyfon.itea.ntnu.no>
	<ojof1057b4o9kurh6a55f1rfan4d8v3l53@4ax.com>
Message-ID: <23891c90.0401290235.2b73e314@posting.google.com>

Chuck Spears <Chuck at spears.com> wrote in message news:<ojof1057b4o9kurh6a55f1rfan4d8v3l53 at 4ax.com>...

[Quoting someone else...]

> >The conclusion may seem obvious to _you_ but this is no guarantee that
> >everyone else also possesses this knowledge. OSS is being hailed as
> >the second coming,

...by generally clueless analysts and journalists whose day job seems
to focus exclusively on speculation and rumour forwarding, switching
over to hyping Microsoft and other vendors "du jour" when they feel
the need to encourage a "debate".

> If you can get by his trolling and unbearable arrogance,  there are
> some kernels of truth in there.  I come from a commercial background
> as well but instead of trying to exploit the OSS community, ive been
> lurking around looking for a project I feel I could contribute to. 

Yes, this is the key to the issue. If you regard open source software
as a huge pile of "free stuff" to plunder, then whilst you may get
some productivity benefits in the short term, the longer term will
most likely bring maintenance issues as the community continues on its
own course and you continue on yours. (If you actually have a course
of developing the code, that is, as opposed to just dropping the
plundered code into some directory and virtually forgetting that you
have it.)

>  Most geeks by their nature, are very independent and abhor order.

I'm not sure that I equate "open source developer" with "geek" in the
same way that this generalisation demands, but if you mean that most
open source developers who are working on projects in their own time
or under their own motivation won't take orders from newcomers, I
think it's quite obvious why that is.

> You have to have order to get anything done.

True, but numerous open source projects have "order" without
conventional forms of management. On the other hand, if you're saying
that a bunch of "elite" 13 year olds on IRC can't scale their project
beyond a slightly larger group of well-trained primates, then you're
making an obvious point.

>                                               Thats why most
> successful projects have one or at most a few people pulling the
> strings because if you don't, the project will flounder.   I've
> personally based a few of my projects on some OSS projects and they
> failed miserably.  Because of the bugs and the Authors unwilligness to
> address them or even accept them as bugs.  You can say "well why didnt
> you just fix it yourslef" but I just didnt have the time.

There are lots of reasons why developers can't or won't fix the bugs.
It's quite a common phenomenon in the commercial software world, too,
but the reasons are more likely to be political there. Meanwhile, you
don't need to be a conspiracy theorist to understand developer
motivations around such issues in open source projects; quite often,
developers don't have access to the same environment and can't
reproduce or diagnose the bugs that you're experiencing, for example.

> On the other side of the coin, i've used OSS projects like PHP and
> Postgres with great results.
> 
> The other problem with hobbyist geek programmers is they are just in
> it for the fun of it.

How many people with a hobby do it because they don't enjoy it?

>                        They get bored when the last 10% of the project
> which is mostly bug fixing and rengineering code coes about and
> generally abandon it.

Perhaps many projects need assistance from real-world users in order
to get that last 10% done. Consider cases like The Gimp where the
original developers basically dropped the code before the 1.0 release,
but where interested parties picked it up and finished the job. If
every project suffered from the same symptoms that you describe, there
wouldn't be such a thing as GNOME, Sun's Java Desktop System and so
on. Perhaps JDS would be based on KDE instead, however. ;-)

>                        I've poked into literally over one hundred
> sourceforge projects that started out as good ideas and had lots of
> activity.  i'd come back in 6 months and There would be almost no
> activity.  With a developer with a commericial background, he might be
> more willing to see the project through.

Yes, perhaps because he'd be paid to see it through.

> I too get annoyed when an OSS author pulls a massive library into his
> project just to get a few functions out of it he could have written
> himself.  It's really problematic as Brandon has said when you are
> using CygWin or Ming because a lot of these libraries dont work on it.

Just because one is developing with open source software doesn't mean
that one is suddenly exempt from normal software engineering
principles. Perhaps that was what the quoted contributor meant by
those "second coming" claims, but most people understand that the
universe doesn't change its rules on the basis of rumours derived from
misinterpretations of claims by Eric S. Raymond.

Paul


From jcarlson at uci.edu  Tue Jan 20 23:45:21 2004
From: jcarlson at uci.edu (Josiah Carlson)
Date: Tue, 20 Jan 2004 20:45:21 -0800
Subject: Help, *.CHM, etc
References: <90f2d9db.0401201803.6f2adbf8@posting.google.com>
	<20040120181009.060C.JCARLSON@uci.edu>
	<20040120182610.060F.JCARLSON@uci.edu>
	<100rutd6kge1g9f@corp.supernews.com>
Message-ID: <20040120203101.3E3B.JCARLSON@uci.edu>

> > Technically os.system("c:\\path\\help.chm") and
> > os.system("start c:\\path\\help.chm") also work, though
> > are less intuitive.
> 
> No, os.system is the wrong way to do it. That function launches a new
> command shell, which in turn runs the program you want. Because of that, if
> you're not already running in a console window, it will open a new console
> window.
> 
> You had it right with os.startfile. That calls the ShellExecute function in
> Windows, which is the way you would do it in a native Windows application
> written in C.

Mike,

When the command completes, the window dissappears.  This is the case
when running from a script within pythonw or even inside of a py2exe
frozen module.  While it may not be the 100% correct way of doing things
(and you have to properly escape spaces in the file name, which then
results in having to give a window title, etc.), it does result in a
final outcome that is the same - the help file is open, your program
continues execution.

Certainly he will be using os.startfile(), but knowing that you can use
windows shell commands with os.system can be useful.

 - Josiah



From tdelaney at avaya.com  Mon Jan 26 18:26:37 2004
From: tdelaney at avaya.com (Delaney, Timothy C (Timothy))
Date: Tue, 27 Jan 2004 10:26:37 +1100
Subject: Guardian: open source is a throwback says Jack Schofield
Message-ID: <338366A6D2E2CA4C9DAEAE652E12A1DE011DAACD@au3010avexu1.global.avaya.com>

> From: Skip Montanaro
> 
> Hmmm...  If we're electing the "leader of the free world", 
> maybe the entire
> free world ought to be able to vote.  Imagine the primary 
> season running up
> to that election!

Don't need to - if we got to vote in that, we'd insist that a more rational voting system be used ;)

Tim Delaney



From bobmoore at pobox.com  Sat Jan 31 14:23:42 2004
From: bobmoore at pobox.com (Bob=Moore)
Date: 31 Jan 2004 11:23:42 -0800
Subject: Running External Programs from Within Python
Message-ID: <5a40bf6a.0401311123.4b7f783f@posting.google.com>

I'm considering making the transfer from Rexx to Python as a scripting
language, but there's one thing I can do in Rexx that I can't seem to
do in Python: run an external program.
 
Suppose I have a Tkinter GUI and I want to just push a button and run
the Windows utility notepad.exe.  Or push another button and run one
of my old Rexx programs.
 
Basically I want to send a command line to Python and have it run that
command line as if I'm sending it to the Windows command-prompt, an
MS-DOS window, or clicking on an appropriate program icon.
 
Can I run (call? exec? eval?) an external program from inside a Python
program?

I have checked the FAQ and documentation.
 
Thanx,
 
Bob=Moore


From dpryde+usenet at cis.strath.ac.uk  Wed Jan  7 11:03:42 2004
From: dpryde+usenet at cis.strath.ac.uk (Daniel Pryde)
Date: Wed, 07 Jan 2004 16:03:42 +0000
Subject: Regions of similarity in a matrix
Message-ID: <3ffc2dd9$1@nntphost.cis.strath.ac.uk>

Hi again everyone.

I was wondering if anyone knew of any python modules that are able to 
detect and extract regions of similarity from a matrix. My problem is 
that I have a self organizing map that has been trained, but now need to 
detect and extract the areas that contain similar values. In my case, 
each matrix point contains 9 pixels. I have calculated the euclidean 
values for each 9 pixel tuple in order to search for edges, so I'm 
guessing that an edge would just be a radical change between 
neighbouring values. I'm pretty sure that I'll be able to code it up 
myself, but was just asking in the hope that a module may already exist 
to help me along the way. :)

Any help would be greatly appreciated.

Daniel



From claird at lairds.com  Wed Jan 28 16:29:42 2004
From: claird at lairds.com (Cameron Laird)
Date: Wed, 28 Jan 2004 21:29:42 -0000
Subject: executing an external app
References: <Pine.GSO.4.58.0401281558280.26750@denali.ccs.neu.edu>
	<GJVRb.5895738$be.962461@news.easynews.com>
Message-ID: <101gae65oh6ig72@corp.supernews.com>

In article <GJVRb.5895738$be.962461 at news.easynews.com>,
Joe Francia  <usenet at -OBFUSCATION-joefrancia.com> wrote:
>Joseph Krauze wrote:
>> Hi all,
>> 
>> I have a simple question which I cannot solve (relatively new to Python).
>> I want to write a script that executes an application on the go.  I looked
>> into the exec*e() calls but the problem there is that they do not return.
>> I also looked into execfile() but here the PATH is not taken into account
>> and I couldn't figure out to pass the file that's executed arguments.
>> 
>> So, is there a simple way to execute an external app?
>> i.e. execvpe('cat', 'myFile') - this will not return
>> 
>> Thanks,
>> Joseph
>
>Look at os.spawn* or os.popen*
			.
			.
			.
And os.system().  And commands.getoutput().
-- 

Cameron Laird <claird at phaseit.net>
Business:  http://www.Phaseit.net


From paulo.pinto at cern.ch  Fri Jan 30 08:12:13 2004
From: paulo.pinto at cern.ch (Paulo Pinto)
Date: Fri, 30 Jan 2004 14:12:13 +0100
Subject: package similar to XML::Simple
In-Reply-To: <4017C630.5A6DD35@engcorp.com>
References: <bv80qq$kbg$1@sunnews.cern.ch> <4017C630.5A6DD35@engcorp.com>
Message-ID: <bvdl7d$a54$1@sunnews.cern.ch>

I mean multiple nested dictionaries with lists.

But handyxml seems to solve my problem.

Thanks, guys

Peter Hansen wrote:
> Paulo Pinto wrote:
> 
>>does anyone know of a Python package that
>>is able to load XML like the XML::Simple
>>Perl package does?
>>
>>For those that don't know it, this package
>>maps the XML file to a dictionary.
> 
> 
> A simple dictionary is insufficient to represent XML in general,
> so perhaps you're talking about a subset of XML, maybe with no
> attributes, and where the order of the child elements doesn't 
> matter?  Or something else?
> 
> Or do you really mean something like a multiply-nested
> dictionary, perhaps with lists as well?
> 
> 
>>Of course I can build such a package myself
>>but it would be better if it already exists :)
> 
> 
> We were able to build something similar by stripping down 
> Fredrik Lundh's elementtree until we had little more than the
> calls to the expat parser (i.e. we used his source as a tutorial
> on using expat :-), so if this is something like the XML-subset
> I mention above, you could do it in an hour or so from scratch
> if you knew Python well.
> 
> -Peter



From peter at engcorp.com  Wed Jan 14 09:42:40 2004
From: peter at engcorp.com (Peter Hansen)
Date: Wed, 14 Jan 2004 09:42:40 -0500
Subject: I come not to bury C++, but to praise it...
References: <mailman.337.1074032524.12720.python-list@python.org>
Message-ID: <40055560.7A0DCD0D@engcorp.com>

John Benson wrote:
> [snip]
> I think that the already-posted comments seeking to appreciate the
> historical origin and motivations of C++ are essential to understanding it's
> applicability in the present.
> 
> C++ started as a quintessentially Unix-like exercise in software
> engineering: add functionality by leveraging existing software components to
> the max. Another level of preprocessor (Cfront) was added to the compiler
> tool chain and Bingo! you had a new language. [snip]
> 
> I think that C++ was a great exercise, but software engineering has
> advanced. 

John, thanks for the reminder about the origins of C++.  (I suspect the majority
of readers in this group were not even programming during the CFront era 
(roughly 1983-85?), and a history lesson is always good from time to time.)

I remember C++ as a welcome enhancement which allowed me to extend the 
scope of several large C projects without significantly affecting their
complexity.  Over the years I gradually found C++, especially as a result 
of its ongoing evolution, to be negatively affecting my development instead, 
however, and I was happy to finally move on to the more modern languages 
which software engineering has produced in the over 20 years since C++ came out.

-Peter

P.S.: Found http://merd.net/pixel/language-study/diagram.html while researching
the timing on C++' conception... interesting, and might be nice wallpaper for
some.


From francisgavila at yahoo.com  Thu Jan  8 11:48:41 2004
From: francisgavila at yahoo.com (Francis Avila)
Date: Thu, 8 Jan 2004 11:48:41 -0500
Subject: Descriptor puzzlement
References: <vvqjj92il4o1d0@news.supernews.com>
	<btjkfp$7vu2v$1@ID-198792.news.uni-berlin.de>
Message-ID: <vvr2hat0acrg49@corp.supernews.com>

Mirko Zeibig wrote in message ...
>John Roth said the following on 01/08/2004 01:34 PM:
>Hm, I don't know __set__ and __get__, there are __getattr__ (or
>__getattribute__) and __setattr__ for dynamically assigning attributes.
>Or take a look at properties
>(http://www.python.org/2.2/descrintro.html#property)

Properties are just a wrapper/interface/application of/to descriptors (whose
protocol involves __set__ and __get__).
http://users.rcn.com/python/download/Descriptor.htm for details.
--
Francis Avila



From webmaster at beyond-thoughts.com  Wed Jan  7 18:11:05 2004
From: webmaster at beyond-thoughts.com (Christoph Becker-Freyseng)
Date: Thu, 08 Jan 2004 00:11:05 +0100
Subject: PRE-PEP: new Path class
In-Reply-To: <mailman.159.1073418070.12720.python-list@python.org>
References: <vvivefh35qjv9a@news.supernews.com>	<3FFA7E82.4020609@beyond-thoughts.com>
	<mailman.159.1073418070.12720.python-list@python.org>
Message-ID: <3FFC9209.7060703@beyond-thoughts.com>

Gerrit Holl wrote:
> Christoph Becker-Freyseng wrote:
> 
>>[1] I think Path being a subclass of str is odd. There are a lot of 
>>string-operations that don't fit to path (some of them should be 
>>implemented in a different way e.g. __mul__ if at all).
>>However the point with the old os function etc. is very sound. So it 
>>might be a good idea to have Path being a subclass of str *for 
>>transition*. But finally all those functions should call str(argument) 
>>instead of of demanding a str-object as argument (if they don't already 
>>today).
> 
> 
> Another possibility, which I have put in the Pre-PEP, is;
> 
> We can add a method .openwith(), which takes a callable as it's first
> argument: p.openwith(f, *args) would result in f(str(p), *args). This
> would make p.open(*args) a shorthand for p.openwith(file, args).
> 
> What do you think?
> 
openwith would be a nice add-on. I see two problems with it:
1.) it's long. I mean
    f(str(path), *args)
    is shorter than
    path.openwith(f, *args)
I got an idea of shortening this and making it look a bit like shell
(I'm not convinced of it very much, but I didn't want to keep it secret 
--- maybe others like it ...)

path > (f, arg1, arg2, ...)

(this works by overwriting path.__gt__)

2.) the position of the argument for the path can only be the first one.
(maybe one could misuse even more operators e.g. the __r...__ ones; But 
I think this will result in obscure code)


path.open shouldn't always call the ordinary file-constructor. I mean it 
should be changed for special path-classes like FTPPath ...
(Of course for ordinary file-paths the ordinary file-class is the right 
one.)
> 
>>This takes me to my last point:
>>What about invalid paths?
>>Should Path-Class take care of always being a valid path (this doesn't 
>>necessarily mean a path of an existing file/directory)
> 
> 
> It may be a good idea to do so. At first, I didn't understand what it
> meant, an 'invalid path', but let's define it as anything that triggers
> a TypeError when passed to open or listdir. On POSIX, I know only one
> case: \0 in path. It may be a lot more difficult on Windows or the Mac.
> I'm not sure about this idea yet.
But it could avoid a lot of trouble when accessing the path.
Maybe I've a better idea (see below)
> 
> 
>>Especially if someone uses string-methods on a Path-object there could 
>>arise invalid paths, even if finaly the path is valid again.
> 
> 
> Yes. But I can't really think of a use case for doing operations on a
> path which make it invalid. Does it occur in practice?
It easily happens on old FAT-FS. Think of a function that wants to 
expand paths e.g.: (this is kind of "string-based")

def myfiles(path):
	if path.endswith('*'):
		return [
			path[:-2] + 'file1.txt',
			path[:-2] + 'game.exe',
			]
	else:
		return path

But probably sometimes stuff like this is useful.
Additionaly path-validity is filesystem-dependend. And worse on system 
like Linux there can be more than one file system within the same root / 
and they all could have different restrictions!
(if I were a viscious guy I could even umount and mount a different fs 
making a valid path possibly invalid)

So I think the better solution would be to define a
path.isValid()
method. It would just evaluate on call (which makes it unlikely that 
things change during call and usage of the result -- without locking a 
file/dir more isn't possible)

We also need a
path.exists()
method.

I'm not sure how both should interact ??


Another Point:
Should Path be immutable like string?




    Christoph Becker-Freyseng





From jjl at pobox.com  Sat Jan 10 12:44:16 2004
From: jjl at pobox.com (John J. Lee)
Date: 10 Jan 2004 17:44:16 +0000
Subject: urllib - changing the user agent
References: <8089854e.0401090509.3dd74859@posting.google.com>
	<n20uvvshb3mnj53qlbfto1fofamnomj88g@4ax.com>
	<871xq8ri6h.fsf@pobox.com>
	<pan.2004.01.09.21.16.06.156445@yahoo.com>
Message-ID: <87eku7y9zj.fsf@pobox.com>

Samuel Walters <swalters_usenet at yahoo.com> writes:

> |Thus Spake John J. Lee On the now historical date of Fri, 09 Jan 2004
> 20:16:54 +0000|
>  
> > or again, you can set .addheaders on OpenerDirector (which will cause
> > those headers to be added to all requests).

(just to clarify, I meant an OpenerDirector instance, not the class
itself)


> This, however, does not stop the original User-agent header to be sent,
> and google still filters out the request.  Instead, it just causes a
> second user-agent to be sent.

No, it does stop them being sent.  Perhaps you mutated the base class
.addheaders by mistake (using .append(("User-agent", "blah")), for
example)?  Don't do that!  Mutating class attributes is a bad idea.


> Here is the very bad code I used to solve this problem.  There are better
> ways, I assure you, but it should point you in the right direction.  You
[...]

No need to assure me of *that* <wink>.  You can call a base class
constructor directly, you know.  And clobbering the base class'
constructor is another very bad idea.


John


From __peter__ at web.de  Sun Jan 11 12:36:22 2004
From: __peter__ at web.de (Peter Otten)
Date: Sun, 11 Jan 2004 18:36:22 +0100
Subject: [Newb] Still not able to solve class attribution
References: <pan.2004.01.11.16.18.09.483280@laptop.home.net>
Message-ID: <bts1bh$job$02$1@news.t-online.com>

Knoppix User wrote:

> class GIP(wx.Frame):
>     def __init__(self, parent, ID, title):
>         wx.Frame.__init__(self, parent, ID, title, size = (600, 460))
> 
>         ....
> 

Just an idea: how about moving the following statement up immediately after
the wx.Frame.__init__(...). The DisplayImg() method *could* be called in
the code you abbreviate with the above four dots.

>        self.Image = wx.StaticBitmap(self, -1,
>        wx.EmptyBitmap(*self.thumbSize),
>             pos = (160,10))     <<<<<<<<<<<<<<<<<<<<I thunk I dunnit here!

Peter



From noemail at noemail4u.com  Thu Jan 29 07:39:04 2004
From: noemail at noemail4u.com (Dang Griffith)
Date: Thu, 29 Jan 2004 12:39:04 GMT
Subject: Confused about a list.sort()
References: <S6FRb.2098$P17.1139@fed1read03>
	<xsQRb.28535$6O4.748063@bgtnsc04-news.ops.worldnet.att.net>
Message-ID: <a96b019182bb85fbdd532a5573ba27c7@news.teranews.com>

On Wed, 28 Jan 2004 15:22:05 GMT, wes weston <wweston at att.net> wrote:

>    Switch from windoze to linux and provide screen dumps.

I don't understand part of your comment.  Windows can provide screen
dumps also.  That's not a reason to switch.  :-)
    --dang


From gerrit at nl.linux.org  Tue Jan 27 08:16:51 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Tue, 27 Jan 2004 14:16:51 +0100
Subject: How does compare work?
In-Reply-To: <20040126235704.GD13453@siliconimage.com>
References: <40158680$0$7044$ba620e4c@news.skynet.be>
	<20040126235704.GD13453@siliconimage.com>
Message-ID: <20040127131651.GA3495@nl.linux.org>

Inyeol Lee wrote:
> (This unusual definition of comparison was used to simplify the
> definition of operations like sorting and the in and not in operators.
> In the future, the comparison rules for objects of
> different types are likely to change.) 
> """

When comparing mixed types becomes illegal, does that mean sorting a
sequence of mixed types becomes illegal as well? Or will sort be a
special case?

yours,
Gerrit.

-- 
136. If any one leave his house, run away, and then his wife go to
another house, if then he return, and wishes to take his wife back:
because he fled from his home and ran away, the wife of this runaway shall
not return to her husband.
          -- 1780 BC, Hammurabi, Code of Law
-- 
PrePEP: Builtin path type
    http://people.nl.linux.org/~gerrit/creaties/path/pep-xxxx.html
Asperger's Syndrome - a personal approach:
	http://people.nl.linux.org/~gerrit/english/



From harry.g.george at boeing.com  Fri Jan  9 05:57:00 2004
From: harry.g.george at boeing.com (Harry George)
Date: Fri, 9 Jan 2004 10:57:00 GMT
Subject: Database interfacing
References: <mailman.225.1073663120.12720.python-list@python.org>
Message-ID: <xqxhdz5bdab.fsf@cola2.ca.boeing.com>

"Michael T. Babcock" <mbabcock at fibrespeed.net> writes:

> I'm working with databases (MySQL primarily) more and more with
> Python, and having used PERL in the past for similar work, I'm
> wondering if there are good tools for doing 'intelligent'
> selects/inserts to/from dictionaries, etc.  For example:
> 
> data = {'FirstName': 'Michael', 'LastName': 'Babcock', 'Age': 99}
> lastid = db.insert('Users', data)
> 
> ... which would execute "INSERT INTO Users (FirstName, LastName, Age)
> VALUES ('Michael', 'Babcock', 99)"
> 
> And also helpful would be:
> 
> data = db.query("dbname", "SELECT * FROM Users WHERE Age >= 99)")
> 
> ... which would return me an array of dictionary items like:
> 
> [ {'ID': 143, 'FirstName': 'Michael' ... }, {'ID': 242, ... }, ... ]
> 
> Just curious, thanks (I've written a piece of code to generate the
> array of dictionary results myself actually, but I'm sure someone
> else's is better).
> 
> -- 
> Michael T. Babcock
> C.T.O., FibreSpeed Ltd.
> http://www.fibrespeed.net/~mbabcock
> 
> 
> 

You can write tools like this yourself or use existing tools.  For
starters take a look at: http://skunkweb.sourceforge.net/PyDO/

If you roll your own, here are some considerations:

You need to synchronize the table definitions in the DBMS with the
class definitions in python.  Some approaches start with the DBMS and
extract the table definitions (attributes, keys, etc) for use in
generating the needed python code.  Some start with python and define
a list of attributes and their meta data as a class-level var for a
class.  (I've tried both ways.)

Python-first opens the door to aspectual programming.  But you may
need both approaches when you need to work with existing code or
databases.

-- 
harry.g.george at boeing.com
6-6M31 Knowledge Management
Phone: (425) 342-5601


From python-url at phaseit.net  Mon Jan  5 20:43:49 2004
From: python-url at phaseit.net (Emile van Sebille)
Date: Tue, 06 Jan 2004 01:43:49 -0000
Subject: Dr. Dobb's Python-URL! - weekly Python news and links (Jan  5)
Message-ID: <vvk4mlb2s0019@corp.supernews.com>

QOTW:  "Name me any product (except maybe TeX) that was mature at version
1.0.  I remember using Visual Basic at v1.0 and it definitely wasn't
mature..."
  -- Alan Gauld on the maturity of IDLE

"Most Python users don't know C, and will never see the C implementation."
  -- Tim Peters


    Rob Hughes wishes all a Happy New Year in a multilingual piece of code.
        http://groups.google.com/groups?threadm=809f2610.0401011312.190dfb44 at posting.google.com
    
    Art Haas announces the eleventh development release of PythonCAD, a
    fully scriptable drafting program written in python.
        http://groups.google.com/groups?selm=mailman.1072891982.24293.clpa-moderators at python.org
    
    Daniel Pryde gets some ideas on optimizing a best match searching
    algorithm.
        http://groups.google.com/groups?threadm=a0YHb.5354%24DC4.2417%40fe2.texas.rr.com
    
    Barry A. Warsaw releases Mailman 2.1.4, a bug fix release that also
    contains support for four new languages: Catalan, Croatian, Romanian,
    and Slovenian.  
        http://groups.google.com/groups?selm=mailman.1072897503.19303.clpa-moderators at python.org
    
    Oh Kyu Yoon asks how to implement plots from scipy, chaco, etc into
    wxPython widget.
        http://groups.google.com/groups?threadm=bt04a4$2e3$1 at news.Stanford.EDU
    
    Bjorn Stabell announces the creation of Python and Zope/Plone Chinese
    Forums.
        http://groups.google.com/groups?selm=mailman.1073049482.17069.clpa-moderators at python.org
    
    hokieghal99 asks Is Python Mac Centric?
        http://groups.google.com/groups?threadm=bss8qn$mb7$1 at solaris.cc.vt.edu
    
    Greg Lindstrom gets help monitoring an MS Exchange mailbox.
        http://groups.google.com/groups?threadm=mailman.20.1072730275.8134.python-list%40python.org
    
    Tim Churches and Adam Twardoch point out articles that may require a
    revision in the Guinness Book of World Records.
         -- http://news.independent.co.uk/world/asia/story.jsp?story=476931
         -- http://www.wftv.com/news/2732086/detail.html
    
    Peter Astrand solicits comments on PEP 324, a proposal to introduce a
    new POSIX process module popen5.
        http://groups.google.com/groups?threadm=mailman.47.1073137666.12720.python-list at python.org
        http://groups.google.com/groups?threadm=mailman.60.1073175311.12720.python-list%40python.org
    
    Mike gets help with a problem building on BeOS.
        http://groups.google.com/groups?threadm=NLhJb.31440$I07.78784 at attbi_s53
    
    Black asks about implementing undo and redo using tkinter.
        http://groups.google.com/groups?threadm=mailman.20.1073011134.12720.python-list%40python.org
    
    Roger Jack is looking for the best tool for templating source code files
    and then generating python code.
        http://groups.google.com/groups?threadm=CMudnfQnOeIn1GqiRVn-uQ at comcast.com
    
    Randall Smith needs a way to convert a datetime string of unknown format
    to a python datetime object.
        http://groups.google.com/groups?threadm=MnIJb.33778$xU1.16252 at fe1.texas.rr.com
    
    Robert Brewer updates his recur.py, then later provides an example of
    using recur.interval with threading.Timer.
        http://groups.google.com/groups?threadm=mailman.58.1073173611.12720.python-list at python.org
    
    Hye-Shik Chang announces Anonfunc 1.0, a C extension module that creates
    anonymous functions based on operator overloading.
        http://groups.google.com/groups?selm=mailman.1073232664.14285.clpa-moderators at python.org
    
    Francois releases Allout-Vim 040103, a tool that eases the handling of
    Allout files from within a Python-enabled Vim.
        http://groups.google.com/groups?selm=mailman.1073155262.15776.clpa-moderators at python.org


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

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

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

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

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

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

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

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

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

    The Python Software Foundation has replaced the Python Consortium
    as an independent nexus of activity
        http://www.python.org/psf/

    Cetus does much of the same
        http://www.cetus-links.org/oo_python.html

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

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

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

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

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


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

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


-- The Python-URL! Team--

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



From exarkun at intarweb.us  Sat Jan 31 09:18:31 2004
From: exarkun at intarweb.us (Jp Calderone)
Date: Sat, 31 Jan 2004 09:18:31 -0500
Subject: problem with weakref.proxy
In-Reply-To: <diose1-fr8.ln1@smell.butthole.homeunix.net>
References: <diose1-fr8.ln1@smell.butthole.homeunix.net>
Message-ID: <20040131141831.GA1064@intarweb.us>

On Sat, Jan 31, 2004 at 02:52:45PM +0100, Walter Haslbeck wrote:
> Hello,
> 
> I'm a completly Python newbie. As a first learning project I want to port
> an game-engine I have writte some time ago in pure C to Python using OO
> methods.
> 
> So I created a base-class 'GOb' (GameObject). This class should have
> a sorted list of all instances stored as as class-attribte __olist[].
> 
> When I add a reference of the new created object in the constructor
> (with GOb.__olist.append(self)) I have 2 references to each created
> instance and if I 'del' the instance the destructor is not called,
> because __olist[] holds another reference to that object.
> 
> Now I got to tip to use the weakref module. Well I thought this should
> be exactly what I need and changed the program to add not a reference
> to the instances but a weakref.proxy.
> 
> So now my instances are deleted really deleted when I use 'del', but:
> How do get corresponding weakref.proxy object out of __olist[]?
> 
> I tried to use the callback parameter from weakref.proxy, but at the
> time when the callback takes place, the proxy object is allready 'dead',
> I get an Exception when I try to remove the proxy-instance from __olist[]:

  A WeakKeyDictionary or WeakValueDictionary might be a better fit for your
problem.  There is no need for you to remove the object from these manually. 
When the object is no longer referenced anywhere else, it also no longer
belongs to the dictionary.

    >>> class foo: pass
    ... 
    >>> import weakref
    >>> d = weakref.WeakValueDictionary()
    >>> x = foo()   
    >>> d['key'] = x
    >>> print d.items()
    [('key', <__main__.foo instance at 0x401eeb2c>)]
    >>> del x
    >>> print d.items()
    []
    >>> 

  Jp





From FBatista at uniFON.com.ar  Tue Jan  6 11:45:02 2004
From: FBatista at uniFON.com.ar (Batista, Facundo)
Date: Tue, 6 Jan 2004 13:45:02 -0300 
Subject: prePEP "Decimal data type" v0.2
Message-ID: <A128D751272CD411BC9200508BC2194D03383448@escpl.tcp.com.ar>


aahz at pythoncraft.com wrote:

#- Overall, looks good.  I think the biggest point of 
#- disagreement still is
#- the behavior of Decimal interacting with floats.  I hope more people
#- will comment once you get a PEP number.

Yes, I know. I don't like one more than other, I just hope to get community
consensus...

I'll wait until tomorrow to get some responses, justo to send to pep at ... a
more polished version (or with less semantic errors, :p).


#- One major correction: "Rationale" means "reason"; "rational" 
#- refers to
#- fractions.  Several times you use "rationale" when you mean 
#- "rational".

Paul Moore pointed that too, sorry for my english, :(

.	Facundo



From mfranklin1 at gatwick.westerngeco.slb.com  Thu Jan 22 06:15:41 2004
From: mfranklin1 at gatwick.westerngeco.slb.com (Martin Franklin)
Date: Thu, 22 Jan 2004 11:15:41 +0000
Subject: Jython and SciTE
In-Reply-To: <Xns9476DAC159131whiteywidowyahoocom@216.77.188.18>
References: <Xns9476DAC159131whiteywidowyahoocom@216.77.188.18>
Message-ID: <1074770140.1056.3.camel@m-franklin>

On Wed, 2004-01-21 at 02:28, rt lange wrote:
> I'm trying to get my jython scripts running and compiling on SciTE.
> This is what I have in my python.properties file:
> 
> command.name.1.*.py=Go Jython
> command.1.*.py=jython $(FileNameExt)

Just in case try inserting the full path name of the jython script here
perhaps when SciTE calls out it creates a sub shell (and in that the
PATH is NOT set...)

command.1.*.py=/usr/jython2.1/jython $(FileNameExt)

HTH
Martin




From webmaster at beyond-thoughts.com  Thu Jan  8 15:55:27 2004
From: webmaster at beyond-thoughts.com (Christoph Becker-Freyseng)
Date: Thu, 08 Jan 2004 21:55:27 +0100
Subject: PRE-PEP: new Path class; open, openwith, __call__
In-Reply-To: <mailman.185.1073563995.12720.python-list@python.org>
References: <vvivefh35qjv9a@news.supernews.com>	<3FFA7E82.4020609@beyond-thoughts.com>	<mailman.159.1073418070.12720.python-list@python.org>	<3FFC9209.7060703@beyond-thoughts.com>
	<mailman.185.1073563995.12720.python-list@python.org>
Message-ID: <3FFDC3BF.7070404@beyond-thoughts.com>

Gerrit Holl wrote:
> Christoph Becker-Freyseng wrote:
> 
>>openwith would be a nice add-on. I see two problems with it:
>>1.) it's long. I mean
>>   f(str(path), *args)
>>   is shorter than
>>   path.openwith(f, *args)
> 
> 
> This is indead a disadvantage. On the other hand, although p.openwith is
> longer, I do think it is more readable. It occurs often that shorter is
> not more readable: just think of all those 'obfuscated-oneliners'
> contests in C and Perl.

Sure. However this case seems to be quite obvious both ways.
> 
> 
>>path > (f, arg1, arg2, ...)
>>
>>(this works by overwriting path.__gt__)
> 
> 
> I think this is not a good idea. In my opinion, any __gt__ method should
> always compare, no more, no less. Further, it's very unusal to call
> something like this.
Additionaly getting the right documentation for these "operator-tricks" 
is harder.
> 
> Another possibility is defining __call__:
> 
> path(f, *args) == f(str(path), *args)
> 
> which may be unconvinient as well, however. Is it intuitive to let
> calling mean opening?
I like this one. What else could calling a path mean?
> 
> 
>>2.) the position of the argument for the path can only be the first one.
>>(maybe one could misuse even more operators e.g. the __r...__ ones; But 
>>I think this will result in obscure code)
> 
> 
> Hm, I think almost all file constructors have the path as the first
> argument. Are there counter-examples?
The whole openwith (other then path.open) is IMO mainly for 
"backward-compatibility" if the function doesn't know the path-class.
I think openwith or better __call__ could be used for other things, too 
--- not only for opening a file. E.g. there could be some 
"FileWatcher-Modules" that might only accept strings and have a call like:
watchFile(onChangeFunc, path_string)

For different postition of the path_string we could make a special case 
if the path-object is given as an argument of the call.
path(f, arg1, arg2, path, arg3, arg4, ...)
results in: f(arg1, arg2, str(path), arg3, arg4, ...)

Changing old code to use the new Path-class could be done with a minimal 
amount of work then.
OLD: result= f(arg1, arg2, path, arg3, arg4, ...)	# path is/was a string 
here
.... result= f,arg1, arg2, path, arg3, arg4, ...)
.... result= (f, arg1, arg2, path, arg3, arg4, ...)
NEW: result= path(f, arg1, arg2, path, arg3, arg4, ...)

> 
> 
>>path.open shouldn't always call the ordinary file-constructor. I mean it 
>>should be changed for special path-classes like FTPPath ...
>>(Of course for ordinary file-paths the ordinary file-class is the right 
>>one.)
> 
> 
> Yes... I was planning to define it in a class which is able to 'touch'
> the filesystem, so an FTPPath could subclass basepath without the need
> to overload open, or subclass ReadablePath with this need.
Fine :-)


Christoph Becker-Freyseng


P.S.: ((I'll post the other things in different Re:'s))





From skip at pobox.com  Wed Jan 14 07:16:11 2004
From: skip at pobox.com (Skip Montanaro)
Date: Wed, 14 Jan 2004 06:16:11 -0600
Subject: Safe prime numbers in Python
In-Reply-To: <200401140639.i0E6dxt09128@mail001.syd.optusnet.com.au>
References: <200401140639.i0E6dxt09128@mail001.syd.optusnet.com.au>
Message-ID: <16389.13067.921116.858507@montanaro.dyndns.org>


    Tim> Does any know of or have Python code (or C or Fortran code wrapped
    Tim> as a Python module) for efficiently finding safe prime numbers -
    Tim> that is a number p such that p and (p-1)/2 are both prime?

Here's what I came up with using gmpy:

    import gmpy

    def safe_primes(last=1):
        while True:
            next = gmpy.next_prime(last)
            if gmpy.is_prime((next-1)/2):
                yield next
            last = next

Seems to work fairly well.

Skip



From amk at amk.ca  Wed Jan 21 08:53:02 2004
From: amk at amk.ca (A.M. Kuchling)
Date: Wed, 21 Jan 2004 07:53:02 -0600
Subject: Pyrex without Python (was Re: calling Pyrex results from C)
References: <20040121005749.GA27424@unpythonic.net>
	<400DD5DE.90405@prescod.net>
	<mailman.567.1074654944.12720.python-list@python.org>
	<j46dnXzUvaFT6ZPdRVn-hg@speakeasy.net>
	<mailman.580.1074689828.12720.python-list@python.org>
Message-ID: <6_CdnXaaT8ejGZPdRVn-hQ@speakeasy.net>

On Wed, 21 Jan 2004 12:58:26 +0000, 
	Richie Hindle <richie at entrian.com> wrote:
> How does it know the types?  Pyrex adds additional syntax to do this, but
> if you're using the plain vanilla compiler package then presumably you're
> doing something else?

Types are predeclared using a different mechanism; the compiler goes in with
a list of all the inputs and outputs and a list of internal variables.  

--amk


From usenet at -OBFUSCATION-joefrancia.com  Wed Jan 14 13:22:03 2004
From: usenet at -OBFUSCATION-joefrancia.com (Joe Francia)
Date: Wed, 14 Jan 2004 18:22:03 GMT
Subject: ProtoCiv: porting Freeciv to Python CANNED
In-Reply-To: <4004AC8E.46A3104F@alcyone.com>
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
	<40047290$1@news.012.net.il>
	<bu29ea$ct54l$1@ID-207230.news.uni-berlin.de>
	<4004AC8E.46A3104F@alcyone.com>
Message-ID: <fNfNb.5633260$Of.890377@news.easynews.com>

Erik Max Francis wrote:
> You're trying to put this weird spin on your public displays of
> embarassment is not really working.  Trying and failing is a part of
> life.  Trying and failing, over and over again, consistently, despite
> insisting quite urgently on how important you are to a community, is
> starting to get suspicious.
> 
> 
>>Those who never taste failure are haughty.
> 
> 
> And those who never taste success should probably come to the
> realization, eventually, that they are doing something wrong.

This reminds me of the old expression: "A winner never quits. A quitter 
never wins.  But if you never win and never quit, you're a fucking idiot."


From samirw at connection.com  Tue Jan  6 23:18:12 2004
From: samirw at connection.com (Sambo)
Date: Tue, 06 Jan 2004 20:18:12 -0800
Subject: Iterating over a binary file
References: <btf5j8$6g26f$1@ID-46268.news.uni-berlin.de>
	<7xznd04ww1.fsf@ruckus.brouhaha.com>
	<du7ptdwsq1t.fsf@lehtori.cc.tut.fi>
	<7xd69wy5zq.fsf@ruckus.brouhaha.com>
Message-ID: <3FFB8884.9080907@connection.com>

Paul Rubin wrote:

> Ville Vainio <ville.vainio at spamster_tut_remove.fi> writes:
> 
> 
>>Paul Rubin <http://phr.cx at NOSPAM.invalid> writes:
>>
>>
>>>>The above code works, but I don't like making two read() calls.  Any
>>>>way to avoid it, or a more elegant syntax?  Thanks.
>>>>
>>>You can make it even uglier:
>>>
>>>    f = file(filename, 'rb')
>>>    while 1:
>>>      data = f.read(1024)
>>>      if len(data) <= 0:
>>>        break
>>>      someobj.update(data)
>>>    f.close()
>>>
>>>There's been proposals around to add an assignment-expression operator
>>>like in C, so you could say something like
>>>
>>>    f = file(filename, 'rb')
>>>    while len(data := f.read(1024)) > 0:
>>>      someobj.update(data)
>>>    f.close()
>>>
>>It's funny, but I find the first version much more readable than the
>>second one. Especially if I consciously forget the "do lots of stuff
>>in condition part of while" indoctrination from C. If there is lots of
>>stuff in while you have to stare at it a bit more, and it becomes
>>"idiomatic", something you learn, perhaps even cookbook stuff, instead
>>of obvious-as-such.
>>
> 
> Idioms exist because they're useful, and there's already plenty of
> them in Python, like ''.join(stringlist) or "for i in xrange(n)" etc.
> 
> Maybe the condition in the while statement makes that statement twice
> as hard to read.  However, the example as a whole can still be easier,
> simply because it's shorter.
> 
> Version 1:
> 
>     Statement                              Reading difficulty
>     =========                              ==================
> 
>       f = file(filename, 'rb')                     1
>       while 1:                                     1
>         data = f.read(1024)                        1
>         if len(data) <= 0:                         1
>           break                                    1
>         someobj.update(data)                       1
>       f.close()                                    1
> 
>     Total reading difficulty:                      7
> 
> Now the second version:
> 
>     Statement                              Reading difficulty
>     =========                              ==================
> 
>        f = file(filename, 'rb')                    1
>        while len(data := f.read(1024)) > 0:        2
>          someobj.update(data)                      1
>        f.close()                                   1
> 
> 
>     Total reading difficulty:                      5
> 
> I got through college on a version of this reasoning.  I was a math
> major.  I had friends studying history and literature who said "that's
> a hard subject", but I thought they were crazy.  But in a normal math
> class, there's one textbook that you use for the whole semester, and
> you cover maybe half the chapters in it.  I was able to keep up.  But
> in a literature course, you usually have to read a different entire
> book from cover to cover EVERY WEEK.  I took a couple classes like
> that and barely survived.  Yes, it takes a lot more effort to read a
> page of a math book than a page of a novel.  When you compare the
> total reading load though, math was a much easier major than
> literature or history.  
> 
> It's the same with programs.  I'd rather read 5 lines of tight code
> that each actually does something, than 3 pages of loose code (the
> kind that's usually written in Java) that spastically meanders trying
> to do the same thing, even if the individual loose lines are easier to
> read than the tight lines.
> 

I would say, that depends on the persons competency in a given language.
Naturally once you are writing long/large programs it is better to have tight 
code, but for a newby it is too much to translate at once.
While I consider myself expert in "C" , I am still learning "C++".

That does not mean a language has to lack the capability.


Then again how large a program can you or would you want to write with python?

Cheers, Sam.



From phleum_nospam at chello.se  Fri Jan  9 16:05:35 2004
From: phleum_nospam at chello.se (Carl)
Date: Fri, 09 Jan 2004 22:05:35 +0100
Subject: Python is far from a top performer according to benchmark test...
Message-ID: <ryELb.238$tK2.228@amstwist00>

"Nine Language Performance Round-up: Benchmarking Math & File I/O"
http://www.osnews.com/story.php?news_id=5602

I think this is an unfair comparison! I wouldn't dream of developing a
numerical application in Python without using prebuilt numerical libraries
and data objects such as dictionaries and lists.

I have been experimenting with numerical algorithms in Python with a heavy
use of the Numeric module. My experience is that Python is quite fast in
comparison with (and sometimes as fast as) traditional languages such as C
or C++. 

The greatest advantage of Python is the great increase in productivity and
the generation of a much smaller number of bugs due to the very clean and
compact structure Python invites you to produce. Sometimes it amazes me how
fast I can produce a working algorithm in Python. The step from an
algorithmic outline on a paper to a working code is very short. The
interactive nature of the Python console invites numerical experimentation
and data exploration. This wasn't mentioned in the article, what a pity!

Carl


From michael at foord.net  Wed Jan 28 04:18:21 2004
From: michael at foord.net (Fuzzyman)
Date: 28 Jan 2004 01:18:21 -0800
Subject: Cross Platform Browser Launcher
Message-ID: <8089854e.0401280118.2f07fb65@posting.google.com>

I've written a simple application in python with an HTML help file.

I'm looking for a cross platform way of launching the help file.

On windows I'd use :
os.system('start help.html')

Which automatically opens the file with the users browser.

Is there a cross-platform way of doing the same thing ? 
I can do a platform test and use different techniques for different
systems - but I don't know how to achieve the same effect on a Linux
(Unix ? Mac ?) machine.....

Any help appreciated.

Fuzzy

--


http://www.Voidspace.org.uk The Place where headspace meets
cyberspace. Online resource site - covering science, technology,
computing, cyberpunk, psychology, spirituality, fiction and more.

--- 

http://www.voidspace.org.uk/atlantibots/pythonutils.html
Python functions - home of dateutils, ConfigObj, StandOut, CGI-News
and more....

--

Everyone has talent. What is rare is the courage to follow talent
to the dark place where it leads. -Erica Jong
Ambition is a poor excuse for not having sense enough to be lazy.
        -Milan Kundera


From davecook at nowhere.net  Sat Jan 10 23:13:48 2004
From: davecook at nowhere.net (David M. Cook)
Date: Sun, 11 Jan 2004 04:13:48 GMT
Subject: Emacs python mode question
References: <pan.2004.01.10.21.08.16.172000@hotmail.com>
Message-ID: <slrnc01jbs.37f.davecook@localhost.localdomain>

In article <pan.2004.01.10.21.08.16.172000 at hotmail.com>, jblazi wrote:

> If I should like to go to line 345: how can I do that? Typing M-x
> goto-line and then 345 is a bit cumbersome.
> I defines the key Alt-g to be goto-line, but it does not work.

In XEmacs, you can just highlight the error line and middle-click.  I don't
know whether this feature is missing in Gnu Emacs or just turned off.

Dave Cook


From nomail at nospam.net  Tue Jan 13 04:56:40 2004
From: nomail at nospam.net (Olaf Meyer)
Date: Tue, 13 Jan 2004 09:56:40 GMT
Subject: problems with dict() in python 2.2
Message-ID: <shPMb.6507$k4.144431@news1.nokia.com>

I'm trying to build a dictionary using python's dict type, but somehow 
it does not work the way I expect it to. Here's the code:

Python 2.2.1 (#7, Jan  9 2004, 16:59:31) [C] on hp-ux11
Type "help", "copyright", "credits" or "license" for more information.
 >>> data=dict(red=1)
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
TypeError: 'red' is an invalid keyword argument for this function

What am I doing wrong?

Thanks,
   Olaf


From jjl at pobox.com  Sun Jan 18 07:11:08 2004
From: jjl at pobox.com (John J. Lee)
Date: 18 Jan 2004 12:11:08 +0000
Subject: Webbrowser and Mozilla control on linux
References: <1d17eeb7.0401171633.170e313a@posting.google.com>
	<IYkOb.5841742$Id.943633@news.easynews.com>
Message-ID: <87ad4lqwwz.fsf@pobox.com>

Joe Francia <usenet at -OBFUSCATED-joefrancia.com> writes:

> Jay Davis wrote:
> > I can launch a browser on linux with the webbrowser module
> > and the .open() method.  However, I want to be able also to
> > control the browser, specifically, I'd like to be able to go to a
> > URL and invoke the automatic form filler and post
> > the form, all from within a python script.
[...]
> If all you're trying to do is automatically fill out web forms, you'll
> probably be better off using ClientForm (and possibly ClientCookie)
> from this page:
> http://wwwsearch.sourceforge.net/

...or if not, it's PyXPCOM that you want.  There are a couple of links
on the "General FAQ" page at the site above.  Unfortunately, PyXPCOM
doesn't have a maintainer with enough time to do it justice ATM, so
you might have trouble building it.  See this bug (which contains a
patch that should let you build it):

http://bugzilla.mozilla.org/show_bug.cgi?id=129216


John


From nospam-deets at web.de  Tue Jan 27 09:29:00 2004
From: nospam-deets at web.de (Diez B. Roggisch)
Date: Tue, 27 Jan 2004 15:29:00 +0100
Subject: threads
References: <bv5qu7$hap$1@solaris.cc.vt.edu>
Message-ID: <bv5sg6$oero6$1@ID-111250.news.uni-berlin.de>

Hi,

> If the above is not suitable for threading, please give me a short
> example of something that is.

Its not suitable for threading. The reason is that threading itself doesn't
give you magically more computational power. Threading simply allows for
severeal threads of execution - hence the name - to be performed
(quasi-)parallel. Its similar to multi-processing: you can start several
processes (programs, so to speak), and they appear to work simultanously.
This is achieved by interrupting each process after a certain amount of
time, put it to sleep and continue to execute another process. This is done
at so short time-slices that it appears to the human user that everything
works in parallel. 

Threads and processes differ in what scope they run in. In a modern OS like
*NIXes and e.g XP/NT, all processes run in separate portions of memory, and
can't access other processes memory. This can only achieved explicitely by
inter process communication, which is a wide topic and I won't dive into it
right here.

OTH Threads are parallel threads of execution "inside" one process. They all
share the same memory and thus variables and data-structures. The
responsibilities are now reverse: You can access everything, so to prevent
thread A from altering a datum thread B is currently working on, you have
to somehow serialize/synchronize access to that datum. This is done using
semaphores, mutexes or locks - things you can read about in the api docs.

Now when do you _need_ threads then? This easier asked than answered, and
sometimes a question of choice or taste. But I think these are some
indicators:

 - you want several parts of your program to be responsive to user input
while they perform some actual work. I bet you have expirienced locked GUIs
in programs that were doing some stuff, like decompression an archive or
the like - this could be avoided by a special gui-thread that allows you to
tinker with menus/buttons while the work is done in the background.

 - if you actually have a mulitprocessor-machine, the quasi from
quasi-parallel vanishes. Then one processor can execute one thread, and
another one the other. Of course this scales only up to the number of
processsors you have.

 - in languages that don't features like coroutines/generators, sometimes
applicatioin logic is much more natural when expressed in different
threads, where each thread has his own call-stack, state and so on. This is
e.g. the case in JAVA. However, there _is_ a cost for that, as the so
called context-switch between threads isnt't for free, and synchronizing
can eat up precious time.

 - some people use threads to handle blocking io. This is similar to the
point above - if you have a net-based protocol, its much more natural to
implemnt when you don't have to care if and when its waiting for input and
then would pass back execution to a point where your program waits for all
your sockets to return with data. Then you'd have to dispatch to the
appropriate part of the protocol-implementation. A thread just would sit on
the socket and wait until it returns. Then the logic goes on uninterrupted.

Hope that shed some light on it for you,

Diez


From Stephane.Ninin at fr.invalid  Sat Jan 24 15:27:49 2004
From: Stephane.Ninin at fr.invalid (Stephane Ninin)
Date: Sat, 24 Jan 2004 21:27:49 +0100
Subject: nested class problem
Message-ID: <4012d34f$0$17124$626a54ce@news.free.fr>

  Hello all,

I am trying to play with nested class in a script I am making,
and I am not sure I really understand how they work.
 

Here is some code:

__all__ = ["ITest"]

from exceptions import Exception

class ITest(object):

    
    def __init__(self):
        if (self.__class__ == ITest):
            raise Exception("ITest cannot be instanciated")

    def read(self,filename):
        self.__filename = filename
        
    def _getFilename(self):
        return self.__filename
    
    def make_reader():
        return _PTest()
    make_reader = staticmethod(make_reader)


    
class _PTest(ITest):

    class _PHandler(object):
        
        def __init__(self):
            super(_PHandler,self).__init__()
            #self.__map={}

        def test(self):
            pass
        
    def __init__(self):
        super(_PTest,self).__init__()


    def read(self,filename):
        super(_PTest,self).read(filename)
        print "HERE"
        print dir()
        print dir(self)
        print self.__class__
        print dir(self.__class__)
        dh = self._PHandler()
        #dh.test()

if __name__=='__main__':

    a=ITest.make_reader()
    print dir(a)
    b=a.read("")
    print b
    



I want to put class _PHandler in _Ptest,
and use _PHandler in _Ptest methods,
but anything I try doesnot work...

On this configuration, I have:
Traceback (most recent call last):
  File "./test.py", line 58, in ?
    b=a.read("")
  File "./test.py", line 51, in read
    dh = self._PHandler()
  File "./test.py", line 34, in __init__
    super(_PHandler,self).__init__()
NameError: global name '_PHandler' is not defined

and I have similar problems if I try to access _PHandler
in different ways...
Is this possible somehow ? Or what is the problem with my approach ?
I know I could just dont use nested classes.., but I'd like to try. 

   Thanks in advance. 

   Regards,






-- 
Stephane Ninin



From cygnus at cprogrammer.org  Thu Jan 29 22:31:27 2004
From: cygnus at cprogrammer.org (Jonathan Daugherty)
Date: Thu, 29 Jan 2004 22:31:27 -0500
Subject: Python vs. Io
In-Reply-To: <711c7390.0401291301.3f95794@posting.google.com>
References: <711c7390.0401291301.3f95794@posting.google.com>
Message-ID: <20040130033127.GA30452@mail.theserver.ath.cx>

As other posts have indicated, this is not the io-user-list.  While
you probably have good, purely academic intentions with your post,
this is not the correct forum.  Create an io-vs-python list somewhere
and I'm sure you'll get a few subscribers. :)

-- 

  Jonathan Daugherty
  http://www.cprogrammer.org

  "It's a book about a Spanish guy called Manual, you should read it."
                                                            -- Dilbert



From mark at mceahern.com  Thu Jan 15 14:29:02 2004
From: mark at mceahern.com (Mark McEahern)
Date: Thu, 15 Jan 2004 13:29:02 -0600
Subject: TUPLE & LIST
In-Reply-To: <%7xNb.55$Uw3.50@newsr2.u-net.net>
References: <%7xNb.55$Uw3.50@newsr2.u-net.net>
Message-ID: <4006E9FE.50104@mceahern.com>

Yomanium Yoth Taripo?t II wrote:

>3) im looking the fucking manual, and cant add value in my tuple, when it already created :/
>  
>
there's a manual for fucking that talks about tuples?  sounds fun.  do 
share.

cheers,

// m



From jzgoda at gazeta.usun.pl  Tue Jan 27 11:19:44 2004
From: jzgoda at gazeta.usun.pl (Jarek Zgoda)
Date: Tue, 27 Jan 2004 16:19:44 +0000 (UTC)
Subject: python As400
References: <mailman.865.1075217863.12720.python-list@python.org>
Message-ID: <bv6330$s8i$1@nemesis.news.tpi.pl>

Enrique <enrique.palomo at xgs-spain.com> pisze:

> 2.- files in as400 are in ebcdic. But i need to work in ascii to sort de
> data later. Can i work in as400 with ascii files?

Sure. You can use codecs.open() to open such files, this will provide
you with transparent decoding to unicode objects during reading. To
write ascii, use encode() function of unicode object to get string in
desired encoding. I found working with unicode objects more convenient,
although re.UNICODE is broken.

-- 
Jarek Zgoda
Unregistered Linux User #-1
http://www.zgoda.biz/ JID:zgoda-a-chrome.pl http://zgoda.jogger.pl/


From xah at xahlee.org  Sun Jan 25 04:36:04 2004
From: xah at xahlee.org (xah lee)
Date: Sun, 25 Jan 2004 01:36:04 -0800
Subject: perl bug File::Basename and Perl's nature
In-Reply-To: <20040125091051.GA14795@nl.linux.org>
References: <7fe97cc4.0401242131.22acf485@posting.google.com>
	<20040125091051.GA14795@nl.linux.org>
Message-ID: <E549A1F6-4F19-11D8-95A8-000A95C58224@xahlee.org>

think not what other messages are doing, think of what your message is 
doing.

i am a known positive troll. It is people like you, who piggy back on 
me, supports my constructive undoing.

Thanks.

PS if perl is demising, then it will benefit Python (because they are 
competitors), and as well all other non-irresponsible programers and 
languages, and consequently the programing industry, and society, and 
software might stop to crash, and people might start to like computers. 
Please read the following article:

---------------------------
Responsible Licenses
Xah Lee, 2003 July
http://xahlee.org/UnixResource_dir/writ/responsible_license.html

Software is a interesting invention. Software has this interesting
property, that it can be duplicated without cost, as if like copying
money. Never in history are goods duplicable without cost. But with
the invention of computer, the ephemeral non-physical programs breaks
that precept. In digital form, program and music and books all become
goods in essentially infinite quantity.

All is good except, bads in digital form can also multiply equally,
just as goods. Wellknown examples are computer viruses and email
spams. Unknown to the throng of unix morons is software bads. In a
unix moron's mind, the predominant quip among hackers is "where is
your code?", singnifying the mentality that a hacker's prestige is
judged on how much code he has contributed to the community.
Therefore, every fucking studs and happy-go-lucky morons put their
homework on the net, with a big stamp of FREE, and quite proud of
their "contributions" to the world. These digital bads, including
irresponsible programs, protocols, and languages, spread like viruses
until they obtained the touting right of being the STARDARD or MOST
POPULAR in industry, as if indicating superior quality. Examplary are
C, Perl, RFC, X-Windows, Apache, MySQL, Pretty Home Page (and almost
anything out of unix). The harm of a virus is direct. The harm of
irresponsible software (esp with unscrupulous promotion) is the
creation of a entire generation of bad thinking and monkey coders. The
scales can be compared as to putting a bullet in a person brain,
versus creating a creed with the Holocaust aftermath.

Distribution of software is easily like pollution. I thought of a law
that would ban the distribution of software bads, or like charging for
garbage collection in modern societies. The problem is the difficulty
of deciding what is good and what is bad. Like in so many things, i
think the ultimate help is for people to be aware; so-called
education; I believe, if people are made aware of the situation i
spoke of, then irresponsible software will decrease, regardless any
individual's opinion.

--

The most important measure to counter the tremendous harm that
irresponsible software has done to the industry is to begin with
responsible license, such that the producer of a software will be
liable for damage incurred thru their software. As we know, today's
software licenses comes with a disclaimer that essentially says the
software is sold as is and the producer is not responsible for any
damage, nor guaranteeing the functionality of the software. It is
this, that allows all sorts of sloppitudes and fucking fads and myths
to rampage and survive in the software industry. Once when software
producers are liable for their products, just as bridge or airplane or
transportation or house builders are responsible for the things they
build, then injurious fads and creeds the likes of (Perl, Programing
Patterns, eXtreme Programing, "Universal" Modeling Language...) will
automatically disappear by dint of market force without anyone's
stipulation.

In our already established infrastructure of software and industry
practices that is so already fucked up by existing shams, we can not
immediately expect a about-face in software licenses from 0 liability
to 100% liability. We should gradually make them responsible. And
this, comes not from artificial force, but gradual establishment of
awareness among software professionals and their consumers. (Producers
includes single individual to software houses, and consumers includes
not just mom & pop but from IT corps to military.)

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

  Xah
  xah at xahlee.org
  http://xahlee.org/PageTwo_dir/more.html


On Jan 25, 2004, at 1:10 AM, Gerrit Holl wrote:

> Just bumped into another irresponsibility in perl.

What's this doing in the Python newsgroup?

Gerrit.




From pinard at iro.umontreal.ca  Thu Jan 22 11:59:27 2004
From: pinard at iro.umontreal.ca (=?iso-8859-1?Q?Fran=E7ois?= Pinard)
Date: Thu, 22 Jan 2004 11:59:27 -0500
Subject: Program Python in VIM
In-Reply-To: <871xpsc5zf.fsf@tulip.whu.ca>
References: <871xpsc5zf.fsf@tulip.whu.ca>
Message-ID: <20040122165927.GA19145@alcyon.progiciels-bpi.ca>

[Peter Wu]
> I'm giving vim a try to program Python. The following are the steps I
> follow to code/test a python program.

> vi test.py
> [key in some python code]
> :wq
> :!python test.py

> Is there any other way? I don't want to type 'python test.py' every time
> I've made any modifications. In Emacs, I can simply fire C-c C-c to fire
> the python interpreter. Thanks!

I do not know if there is a better way, but what I do for one is to
create a small Makefile like:


try:
	python test.py


(there is really a TAB above), and then, from `vim', do `:make'.

-- 
Fran?ois Pinard   http://www.iro.umontreal.ca/~pinard



From __peter__ at web.de  Tue Jan 20 18:46:02 2004
From: __peter__ at web.de (Peter Otten)
Date: Wed, 21 Jan 2004 00:46:02 +0100
Subject: always the same object
References: <bukbuo$rqp$1@news.rz.uni-karlsruhe.de>
Message-ID: <bukedt$deg$02$1@news.t-online.com>

Uwe Mayer wrote:

> Hi,
> 
> I am using struct.unpack() quite often. unpack() returns a tuple, however
> a tuple with always the same id(), which is AFAIK the memory location of
> the structure.
> 
> I found myself working with above tuple, initialising other data
> structures, etc... and when I tried to change one list element, suddenly
> all list elements change => so they all contain the identical object
> 
> Now what are the rules when Python re-uses an old object (as with
> struct.unpack() ) and when does it create new objects?
> And what ist the proposed solution for dealing with this situation, i.e.
> how to I create a true copy of what struct.unpack() returns me?

Most likely your problems have nothing to do with struct.unpack(), as it
returns a tuple containing - as far as I know - only immutable objects. I
suppose you are using the same list multiple times later in your script,
and making a shallow copy 

otherList = list(someList)

should suffice to remedy the observed "change once, see anywhere"
experience. However, this is hard to tell without any sourcecode. So in the
future, please take the time to compose a minimal script reproducing the
observed behaviour along with a short description of what the script is
supposed to do.

Peter




From timr at probo.com  Mon Jan  5 20:39:30 2004
From: timr at probo.com (Tim Roberts)
Date: Mon, 05 Jan 2004 17:39:30 -0800
Subject: using cgi form via http and extracting results
References: <3ff84844.0@news1.mweb.co.za>
Message-ID: <ca4kvvskfmi3mm69t6hq8u8tkmch84jsv1@4ax.com>

bmgx <bmgx_no_sp at mgleesonprop.co.za> wrote:

>I would like to use an already existing online service (currency 
>converter) basically consisting of a html form with a few options that 
>is submitted and returns the results. I really don't know where to start 
>but I have assumed the following steps need to be taken:
>
>1) Make an http connection to the remote script (http://server/script.cgi)
>
>2) Fill out the html form (1x TEXT and 2x SELECT input fields)
>
>3) Submit the form
>
>4) extract the actual returned result. (using regex or something..)

You don't actually need steps 1 and 2 at all.  HTTP transactions are all
completely separate.  The results of a form submission are just a URL.  If
the form has fields "FromCurrency", "ToCurrency", and "Amount", all you
have to do is this:


http://www.currencyservice.com?FromCurrency=dollars&ToCurrency=pounds&Amount=15

You don't have to HAVE the form source in order to submit a request.
-- 
- Tim Roberts, timr at probo.com
  Providenza & Boekelheide, Inc.


From __peter__ at web.de  Sat Jan 31 12:33:24 2004
From: __peter__ at web.de (Peter Otten)
Date: Sat, 31 Jan 2004 18:33:24 +0100
Subject: problem with weakref.proxy
References: <diose1-fr8.ln1@smell.butthole.homeunix.net>
Message-ID: <bvgot4$7aj$01$1@news.t-online.com>

Walter Haslbeck wrote:

> Hello,
> 
> I'm a completly Python newbie. As a first learning project I want to port
> an game-engine I have writte some time ago in pure C to Python using OO
> methods.
> 
> So I created a base-class 'GOb' (GameObject). This class should have
> a sorted list of all instances stored as as class-attribte __olist[].
> 
> When I add a reference of the new created object in the constructor
> (with GOb.__olist.append(self)) I have 2 references to each created
> instance and if I 'del' the instance the destructor is not called,
> because __olist[] holds another reference to that object.
> 
> Now I got to tip to use the weakref module. Well I thought this should
> be exactly what I need and changed the program to add not a reference
> to the instances but a weakref.proxy.
> 
> So now my instances are deleted really deleted when I use 'del', but:
> How do get corresponding weakref.proxy object out of __olist[]?
> 
> I tried to use the callback parameter from weakref.proxy, but at the
> time when the callback takes place, the proxy object is allready 'dead',
> I get an Exception when I try to remove the proxy-instance from __olist[]:
> 
> Exception exceptions.ReferenceError: 'weakly-referenced object no
> longer exists' in <function proxy_callback at 0x4040c02c> ignored
> 
> And if I iterate throu all objects in __olist[] I get an
> 'ReferenceError: weakly-referenced object no longer exists'
> 
> 
> please look at the following source:

[...]

I'd recommend being lazy and using a WeakValueDictionary instead of building
the machinery on your own. Your code would then look similar to the
following:

import weakref

class GOb:

    all = weakref.WeakValueDictionary()

    def c_show_all():
        print "all GObs, sorted by priority:"
        values = GOb.all.values()
        values.sort()
        for i in values:
            print i

    c_show_all = staticmethod(c_show_all)

    def __init__(self, name="GOB", priority=0):
        self.priority = priority
        self.name = name
        GOb.all[id(self)] = self

    def __del__(self):
        print "Destruktor called for GOB " + self.name

    def __str__(self):
        return self.name + " " + str(self.priority)

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

if __name__ == '__main__':

    a=GOb("T1", 0)
    b=GOb("T2", 2)
    c=GOb("T3", 1)

    GOb.c_show_all()
    print "delete T1:"
    del a
    GOb.c_show_all()


Peter



From sombDELETE at pobox.ru  Sun Jan 18 12:28:31 2004
From: sombDELETE at pobox.ru (Serge Orlov)
Date: Sun, 18 Jan 2004 20:28:31 +0300
Subject: newbie question about compression and ascii
References: <mailman.470.1074442222.12720.python-list@python.org>
Message-ID: <buefnq$koc$1@nadya.doma>


"Haim Ashkenazi" <haim at babysnakes.org> wrote in message news:mailman.470.1074442222.12720.python-list at python.org...
> Hi
>
> I'm a real newbie, so sorry if this is a trivial question.
>
> I'm writing a script that collect a list of files and creates a zipfile from
> these files. when running it on linux everything works fine, but when I'm
> running it on windows I get this error when running the command:
>
> myZip.write(file)
>
> UnicodeDecodeError: 'ascii' codec can't decode byte 0xa8 in position 10:
> ordinal not in range(128)
>
> the file variable contains: u'C:\\Document and Settings\\haim\etc...'.

A unicode file name... Zip format doesn't support unicode file names.

>
> is there a way to solve this?

Only work around. Encode the unicode string using an encoding
of your choice. For windows it's probably "mbcs":
if isinstance(file_name, unicode):
    myZip.write(file_name.encode('mbcs'))

-- Serge.






From jjl at pobox.com  Fri Jan  9 09:09:49 2004
From: jjl at pobox.com (John J Lee)
Date: Fri, 9 Jan 2004 14:09:49 +0000 (GMT)
Subject: win32: internet explorer automation problem
Message-ID: <Pine.LNX.4.58.0401091408160.742@alice>

[sorry to send this separately from my direct email reply, but the headers
implied that Micha's reply wasn't sent to the newsgroup]

On Fri, 9 Jan 2004, [iso-8859-2] Micha? ?yli?ski wrote:
[...]
> I don't think this could work - my piece of code is assumed to be completely
> separated from the HTML itself.

I don't know what you mean by that.

> It just 'watches' the MSIE behaviour and
> simulates the user work.

And...?


> AFAIK opening popup creates another MSIE instance,
> so I simply loose the context.

That should just be an implementation detail, shouldn't it?


> It'd be perfect if external window will be
> treated using IHTMLDocument object model,

It is.  Or at least, I'd be amazed if it weren't.  How else would people
use popups from JavaScript via the usual window interface?


> but window object works according
> to this excerpt from MSDN like this:
>
> 'Typically, the browser creates one window object when it opens an HTML
> document. However, if a document defines one or more frames (that is,
> contains one or more frame or iframe tags), the browser creates one window
> object for the original document and one additional window object for each
> frame'

And...?

There is presumably some way of doing this from JavaScript (right?): so do
the same using the interfaces exposed via COM.


> So there is no easy way of doing it like
> Document.NewWindow.documentelement.outerHTML. There is some ppDisp parameter

What's NewWindow, here?


John



From peter at engcorp.com  Mon Jan 19 09:34:57 2004
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 19 Jan 2004 09:34:57 -0500
Subject: Where to post an article?
References: <4f0a9fdb.0401181356.79a1ec87@posting.google.com>
Message-ID: <400BEB11.E5572142@engcorp.com>

Miki Tebeka wrote:
> 
> I have a little article I'd like to publish.
> It's about how to use Python to repidly develop an assembler (2.5 days in my case).
> 
> Can you recommend a site/paper to publish it?

Is the focus on Python, or on the "rapid" part?  If any agile processes
were used, maybe test-driven development, you would of course be best off
posting on the extremeprogramming Yahoo mailing list.

Else here, as Michael has suggested.

-Peter


From spam_no_thx_ei0stjo at chl.chalmers.se  Sun Jan  4 21:02:29 2004
From: spam_no_thx_ei0stjo at chl.chalmers.se (Jonas)
Date: Mon, 05 Jan 2004 03:02:29 +0100
Subject: problem with async chat client in windows
Message-ID: <btagiv$91o$1@news.gu.se>

Hi,
I'm writing a small chat client to learn some python and networking. No problem 
with the network stuff tho, the problem is when the user should be able to 
interact and type messages to send. Since I work with windows I can't use the 
select function (http://www.python.org/doc/current/lib/module-select.html). 
Maybe it could work if I use two threads? One thread reading keyboard and the 
other handling network stuff, but I would prefer to leave threads out from this. 
Any suggestions?

thx for your time


From jjl at pobox.com  Sat Jan 17 15:54:34 2004
From: jjl at pobox.com (John J. Lee)
Date: 17 Jan 2004 20:54:34 +0000
Subject: How robust  is embedding??
References: <bu5ngq$2im$1@fata.cs.interbusiness.it>
Message-ID: <874quuthx1.fsf@pobox.com>

"Roberto" <rob02omni at vodafone.it> writes:

> I know that surely depend on how robust is my script just wondering if
> anyone is using this in production.

Yes, people do.  Eg., see recent thread on commercial games that embed
Python.  Generally, people tent to prefer to extend Python rather than
embed it, though.


John


From crap at crud.com  Wed Jan  7 03:19:12 2004
From: crap at crud.com (Moosebumps)
Date: Wed, 07 Jan 2004 08:19:12 GMT
Subject: Syntax highlighting in .NET IDE
Message-ID: <4iPKb.764$K_3.702@newssvr29.news.prodigy.com>

Is there a way to have the .NET IDE do syntax highlighting for python?  I
haven't looked into it that much, but perhaps there is some config file one
can download.

Don't ask why, I know there are better editors, but I have special
circumstances.  : )

MB




From amy-g-art at cox.net  Mon Jan 19 17:12:23 2004
From: amy-g-art at cox.net (Amy G)
Date: Mon, 19 Jan 2004 14:12:23 -0800
Subject: Simple question from Python newb... What am I doing wrong? For
	x, y, z in aTuple:
References: <FNXOb.10918$AA6.1283@fed1read03>
	<buhi49$i49rc$1@ID-139865.news.uni-berlin.de>
Message-ID: <5DYOb.10922$AA6.7084@fed1read03>

Thanks for the help.  Got it working like a dream now.


"Dave Kuhlman" <dkuhlman at rexx.com> wrote in message
news:buhi49$i49rc$1 at ID-139865.news.uni-berlin.de...
> Amy G wrote:
>
> > I have a whole bunch of tuples that look something like this,
> >
> > aTuple = ('1074545869.6580.msg', 't_bryan_pw at gmcc.ab.ca', 'Your
> > one stop prescriptions')
> >
> > now that I have this I try
> >
> > for x, y, z in aTuple:
> >     do something with x
> >     do something with y
> >     do something with z
> >
> > But I am getting the error that there are too many values to
> > unpack. If I do...
>
> The "for" statement processes each item in a sequence object.  The
> first object in your sequence object (aTuple) is a string.  The
> string has more that three characters.  So, that string cannot be
> unpacked into your three variables x, y, and z.
>
> In contrast, consider the following:
>
>     >>> value = (('aa', 'bb', 'cc'), ('dd', 'ee', 'ff'))
>     >>> for x, y, z in value:
>         print 'x:', x
>         print 'y:', y
>         print 'z:', z
>
>     x: aa
>     y: bb
>     z: cc
>     x: dd
>     y: ee
>     z: ff
>     >>>
>
> In this example, the first item in the tuple is itself a tuple
> with three items.  Therefore, it can be unpacked into the
> variables x, y, and z.
>
> Dave
>
> -- 
> http://www.rexx.com/~dkuhlman
> dkuhlman at rexx.com




From bart_nessux at hotmail.com  Sat Jan 24 13:01:40 2004
From: bart_nessux at hotmail.com (Bart Nessux)
Date: Sat, 24 Jan 2004 13:01:40 -0500
Subject: time.time()
Message-ID: <buubug$rcj$1@solaris.cc.vt.edu>

am I doing this wrong:

print (time.time() / 60) / 60	#time.time has been running for many hours

if time.time() was (21600/60) then that would equal 360/60 which would 
be 6, but I'm not getting 6 so I'm not doing the division right, any tips?



From astrand at lysator.liu.se  Tue Jan  6 11:47:42 2004
From: astrand at lysator.liu.se (Peter Astrand)
Date: Tue, 6 Jan 2004 17:47:42 +0100 (CET)
Subject: PEP 324: popen5 - New POSIX process module
In-Reply-To: <1xqedn2c.fsf@yahoo.co.uk>
Message-ID: <Pine.LNX.4.44.0401061541440.8513-100000@aristocat.lysator.liu.se>


> I've read the PEP, and I'd like to help with an implementation for
> Windows, if no-one else is doing it. 

Help is always appreciated. I haven't got very far yet. It might be useful 
to look at http://starship.python.net/~tmick/#process as well (but we 
should really try to get a smaller code base than this). 


>Initially, I'll probably use
> win32all (or maybe ctypes) but the intention is that longer term the
> necessary functions be migrated into a supporting C extension.

I like this approach. Ideally, popen5 should work on any Python 2.3+ 
system with win32all, or using the build-in support, when we have added 
that. So, when we are writing supporting C code, we should probably keep 
the interface from win32all. 


> 1. The preexec_* arguments have no meaning on Windows, where the
>    low-level functionality is CreateProcess (spawn) rather than
>    fork/exec. This isn't too crucial, as use of the argument can
>    either be ignored, or probably better, treated as an error on
>    Windows.

Yes, I've thought of this. I also think that these arguments (preexec_fn 
and preexec_arg) should be treated as errors. 


> 2. The method name poll() doesn't seem appropriate in a Windows
>    context (I don't know how it fits with Unix). Better might be
>    is_complete() returning True/False, and use returncode to get the
>    status separately.

Yes, perhaps. This needs some thought. 


> 3. The whole thing about the return code encoding both the exit status
>    and the signal number is very Unix-specific. Why not split them -
>    status and signal attributes, and maybe have is_complete() return 3
>    possible values - +1 = completed OK, 0 = still running, -1 = died
>    due to a signal.

Perhaps. poll() and wait() is mainly a heritage from popen2. I have no 
objections to change this, if we can come up with a good and clean 
solution. Your idea looks interesting, although I've not convinced on the 
name "is_complete()". 

Currently, popen5 provides both the unaltered "exit status" (via 
poll/wait) and the "returncode" (via the .returncode attribute). This is 
good, because it's makes it easy to migrate from the earlier API. 


> 5. I don't like the names fromchild, tochild, and childerr. What's
>    wrong with stdin, stdout, and stderr? OK, stdin is open for write,
>    and the other two for read, but that's fairly obvious as soon as
>    you think about it a bit.

Here's how I see it:

(fromchild, tochild, childerr):
+ Same as with popen2. Easy to migrate etc. 

+ No risk for confusion when connecting the parents stdout to the childs 
  stdin, for example. 

(stdin, stdout, stderr):
+ Nice symmetri with the arguments to the Popen class. 

+ Not as ugly as (fromchild, tochild, childerr)


I need input on this one. I'll change this to whatever people likes best. 


> The biggest issue, though, is that args as a sequence of program
> arguments is very Unix-specific. This is a big incompatibility between
> Unix and Windows - in Windows, the low-level operation (CreateProcess)
> takes a *command line* which is passed unchanged to the child process. 
> The child then parses that command line for itself (often, but not
> always, in the C runtime). In Unix, exec() takes an *argument list*. 
> If you have a command line, you have to split it yourself, a task
> which is usually delegated to /bin/sh in the absence of anything else. 
> This is hard to handle portably.

Oh, I've never thought of this. 


> I'd suggest that the Windows implementation allow two possibilities
> for the "args" argument. If args is a string, it is passed intact to
> CreateProcess. That is the recommended, and safe, approach. The shell
> is still not invoked, so there's no security issue. If a (non-string)
> sequence is passed, the Windows implementation should (for Unix
> compatibility) build a command line, using its best attempt to quote
> things appropriately (this can never be safe, as different programs
> can implement different command line parsing). This is not safe (wrong
> answers are the main problem, not security holes), but will improve
> portability.

I've found some documentation on this.  
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vccelng/htm/progs_12.asp
is interesting. It describes how the MS C runtime translates the
commandline to an argv array. Let's call this "Algorithm A". 

When passed a sequence, popen5 should translate this sequence into a
string by using algorithm A backwards. This should definitely be 
implemented in popen5. 

There are two more cases:

1) Should popen5 support a string argument on Windows?

and

2) Should popen5 support a string argument on UNIX?


You seems to have made up your mind about case 1, and even thinks that 
this should be "recommended". I'm not that sure. 

What about case 2 ? This could be supported by converting the string to an 
sequence using Algorithm A. One large problem though is that Algorithm A 
is *not* the same as a typical shell uses. For example, an OS X user might 
want to do:

    Popen("ls '/Applications/Internet Explorer'")

This won't work if we use Algorithm A. 

If we extend Algorithm A to support single quotes as well, this will not 
work as expected on Windows:

    Popen("echo 'hello'")

Sigh. 


> I agree with Guido's comments on python-dev - this module (popen5 is a
> *horrible* name - I'd prefer "process", but am happy if someone comes
> up with a better suggestion) should aim to be the clear "best of
> breed" process control module for all platforms.

The only drawback with "process" is that it is already in use by 
http://starship.python.net/~tmick/#process. 


> I hope this is of some use,

Indeed. 

-- 
/Peter ?strand <astrand at lysator.liu.se>






From rroberts at adobe.com  Tue Jan 13 12:07:45 2004
From: rroberts at adobe.com (Read Roberts)
Date: Tue, 13 Jan 2004 09:07:45 -0800
Subject: Help in unwrapping a PyObject* returned by an embedded Python
 function
In-Reply-To: <Pine.LNX.4.44.0401131015520.1593-400000@se-126.se.wtb.tue.nl>
References: <Pine.LNX.4.44.0401131015520.1593-400000@se-126.se.wtb.tue.nl>
Message-ID: <p05200f00bc29d410a517@[192.168.1.100]>

You have resolved my confusion. The key that I was missing is that  " 
(item)" does not evaluate as a tuple containing "item", that I have 
to add a comma to force the value to be a tuple with a single 
element. Somehow I have managed to not notice this, despite some 
years of Python work.

Thank you very much!
- Read Roberts

>Hello,
>
>>  Thank you taking the time to read and reply.
>>
>>  In fact, I did try all combinations of
>>
>>  in the  Python call-back function :
>>  	return myString
>>  	return (myString)
>
>These 2 are the same, a tuple with length one has a comma in it, like
>
>     myString,
>
>or (I prefer having brackets around it)
>
>     (myString,)
>
>The key to making a tuple is the ',' though and not the '(' and ')'.
>
>>  and, in the  C calling function,
>>
>>  	PyArg_ParseTuple(pyStringResult, "s", myString)
>>  	PyArg_ParseTuple(pyStringResult, "(s)", myString)
>>
>>  Also, the Python documentation (and other working code examples I
>>  have)  indicate that 'PyArg_ParseTuple',  unlike BuildValues, always
>>  assumes the arguments are supplied in a argument tuple, even if there
>>  is only one argumen.
>
>PyArg_ParseTuple is intended to unravel arguments given to a function.
>These arguments are always stored in a tuple (or in Pythoneese, a
>sequence).
>
>>  I speculate that an argument list object, as required by
>>  PyArg_ParseTuple, is not in fact  a simple tuple., and that
>>  PyArg_ParseTuple cannot be used to parse a regular tuple. Any idea if
>>  this is correct?
>
>I would be highly surprised if this was the case. In my experience,
>Python is very orthogonal and robust. I expect these things to work.
>(I wrote a generator for interfacing Python from C++, and people using
>that generator do much more tricky things than what you try to do).
>
>I did an experiment, and it seems to be working here.
>
>Things to note:
>- PyArg_ParseTuple always needs a tuple as first argument (as you
>   already stated).
>- The return value from Python is passed 'as is', thus 'return "bla"'
>   gives a string PyObject, 'return ("bla",)' gives a tuple object with 1
>   string value, and 'return (("bla",),)' gives a tuple object with 1
>   tuple object containing 1 string object.
>
>Python 'return "bla"' will thus never be parsed by PyArg_ParseTuple,
>because it is not a tuple object.
>
>PyArg_ParseTuple(pyStringResult, "s", myString)
>will match 'return ("bla",)' and
>
>PyArg_ParseTuple(pyStringResult, "(s)", myString)
>will match 'return (("bla",),)'
>
>if myString is of type 'char **' .
>
>See also the attached example code.
>(x.c is a generated (c++) file, manually edited afterwards for the
>experiment. I left the generated code (which uses low level API calls)
>in, may be it is useful to you if you decide to do things yourself
>(and get rid of the tuple requirement from PyArg_ParseTuple in the
>process).
>
>
>If you want to parse 'return "bla"' with PyArg_ParseTuple, you will have
>to first construct a tuple with 1 element around the return value in C
>before handing it over to PyArg_ParseTuple.
>(ie something like
>    tuple==PyTuple_New(1);
>    PyTuple_SET_ITEM(tuple,0,pyStringResult);
>    PyArg_ParseTuple(tuple, "s", myString);
>
>    (followed by the usual DECREF, etc).
>)
>
>
>Hope this helps.
>
>
>Albert
>--
>Unlike popular belief, the .doc format is not an open publically 
>available format.
>
>Content-Type: TEXT/PLAIN; charset=US-ASCII; name="x.c"
>Content-ID: <Pine.LNX.4.44.0401131043030.1593 at se-126.se.wtb.tue.nl>
>Content-Description:
>Content-Disposition: attachment; filename="x.c"
>
>Attachment converted: \:x.c (TEXT/ttxt) (0023E0B6)
>Content-Type: TEXT/PLAIN; charset=US-ASCII; name="bla.py"
>Content-ID: <Pine.LNX.4.44.0401131043031.1593 at se-126.se.wtb.tue.nl>
>Content-Description:
>Content-Disposition: attachment; filename="bla.py"
>
>Attachment converted: \:bla.py (TEXT/ttxt) (0023E0B7)
>Content-Type: TEXT/PLAIN; charset=US-ASCII; name="mk"
>Content-ID: <Pine.LNX.4.44.0401131043032.1593 at se-126.se.wtb.tue.nl>
>Content-Description:
>Content-Disposition: attachment; filename="mk"
>
>Attachment converted: \:mk (TEXT/ttxt) (0023E0B8)

-- 
-----------------------------------------------------------------------------------------
Read K. Roberts			rroberts at adobe.com
Adobe Systems San Jose TW12 	(408)-536-4402 on Weds
San Francisco 			(415) 642-5642 Mon, Tues, Thurs, Fri



From graham__fawcett at hotmail.com  Fri Jan 30 09:13:43 2004
From: graham__fawcett at hotmail.com (Graham Fawcett)
Date: 30 Jan 2004 06:13:43 -0800
Subject: RESTful Python
References: <mailman.1022.1075441155.12720.python-list@python.org>
Message-ID: <e9570f37.0401300613.686b05a2@posting.google.com>

"SimonW" <drconrad at metaplay.com.au> wrote in message news:<mailman.1022.1075441155.12720.python-list at python.org>...

> Can anyone point me to some REST style implementations in Python?

Dave Kuhlman has written on RESTful programming with the Quixote Web framework:

http://www.rexx.com/~dkuhlman/quixote_index.html

-- G


From philh at invalid.email.address  Fri Jan 23 09:11:53 2004
From: philh at invalid.email.address (phil hunt)
Date: Fri, 23 Jan 2004 14:11:53 +0000
Subject: Easibox 0.4.2 released - an archiving program
Message-ID: <slrnc12at9.enu.philh@cabalamat.cabalamat.org>


I've just released version 0.4.2 of my Easibox program, which is
used to automate the creation of archive files (tar, tar.gz, tgz,
tar.bz2 and zip formats), typically for open source projects.

New features in Easibox 0.4.2
=============================

Version 0.4.2 adds new features to Easibox: 
 
* the "easiunbox" program unpacks archive files. 
* the main easibox executable now deals better with subdirectories
  and hidden files. 
* the --info option has also been enhanced.

The "easiunbox" program does the opposite of the "easibox"
program: it takes one archive file, and unpacks it to produce its
individual component files. You use easiunbox from the command
line like this:

   $ easiunbox somearchive.tar.gz
   
Easiunbox uses the extension (in this case .tar.gz) to work out
what sort of archive file it is; then it unpacks it. Easiunbox
doesn't do anything you couldn't do from the command line with
unzip, tar, gunzip, or bunzip2, but it easier just to remember
one command than all of those with all their options.  

Further information
=================== 

Easibox is written in Python and licensed under the GNU General
Public License; see file COPYING (which comes with the
distribution) for details.

Release notes for the latest version of Easibox:
   <http://www.cabalamat.org/weblog/current_easibox.html>
   
The Easibox home page:
   <http://www.cabalamat.org/oss/easibox/intro.html>

Easibox page on Freshmeat:
   <http://freshmeat.net/projects/easibox/>


-- 
"It's easier to find people online who openly support the KKK than 
people who openly support the RIAA" -- comment on Wikipedia
(Email: zen19725 at zen dot co dot uk)  




From mwilson at the-wire.com  Tue Jan 27 14:45:13 2004
From: mwilson at the-wire.com (Mel Wilson)
Date: Tue, 27 Jan 2004 14:45:13 -0500
Subject: Best way to do this?
References: <100jg9er3qak890@corp.supernews.com>
	<ww9CAls/KHqM089yn@the-wire.com> <40106D38.3010302@void.com>
Message-ID: <J/rFAls/KzKM089yn@the-wire.com>

In article <40106D38.3010302 at void.com>, sambo <sambo at void.com> wrote:
>
>>The "obscure" for/else can help:
>>
>>
>>def get_password (prompt):
>>    for i in (1, 2, 3):
>>        password = raw_input (prompt)
>>        if password == 'mypass':
>>            return True
>>        else:
>>            print "Try Again"
>>    else:
>>        print "Too Bad"
>>        return False
>>
>Obscure? at least it does something.

   Well, yeah, but I did put it in quotes.  It was some time
before I realized that else could go with for.  And a bit
longer before I got my head around what it did.

   In retrospect, I would say that for/else would have
looked its best in a code snippet, as presented by the
original poster.  "Cleaning up" the code into a function
meant that I could have ditched the "else" and just made the
next two statements the last in the function.  So:

    for i in (1, 2, 3):
        password = raw_input (prompt)
        if password == 'mypass':
            good_password = True
            break
        else:
            print "Try Again"
    else:
        print "Too Bad"
        good_password = False
...
    if good_password:
...


>What is the advantage of the following assignment ( a few messages up)
>
>attempts, password = 3, 'mypass'
>
>Reading difficulty - at least 3 (no relation, hehe)

   No particular advantage I can imagine.  When two
variables are fated to be together throughout the algorithm,
then you can help express this with tuple unpacking.  The
serious reason for tuple unpacking is to make sure that all
the value calculations are done before you try the
assignments:

        a, b = b, a

or
        try:
            v1, v2, v3 = f1(), f2(), f3()
        except some_exception:
...

which makes the assignments to the v's an all-or-nothing
operation.

        Regards.        Mel.


From mcshane7 at blueyonder.co.uk  Wed Jan  7 11:42:30 2004
From: mcshane7 at blueyonder.co.uk (Paul Mcshane)
Date: Wed, 7 Jan 2004 16:42:30 -0000
Subject: Newbie question
Message-ID: <OFWKb.9410$C05.8087@news-binary.blueyonder.co.uk>

I havn't got a clue what I'm doing so don't treat me like I'm stupid even
though I am compared to all of you. What is the basics to programming, you
write the code and compile it? I know a few useless web languages so they
should come in handy on my way. So you need a compiler to compile your code
unless you can do it yourself? Once the program is compiled you can run it
as a normal executable?
 Any answers are appreciated, I just wanna get to know what I'm doing before
I start to learn anything.
 Thanks again,
             Paul Mc.




From JTesser at nbbc.edu  Tue Jan 13 08:31:33 2004
From: JTesser at nbbc.edu (Jason Tesser)
Date: Tue, 13 Jan 2004 07:31:33 -0600
Subject: wxwindows question
Message-ID: <04875CB4331F0240A0AD66F970978651160A77@paul>

I am looking into using wxwindows for a gui to develop applications.
The 
Apps need to be cross-platform Mac, Windows, Linux. I work
For a bible college and will be developing applications ranging from
online
Registration to business office software.  My question is what is your
guys
Experiences with wxwindows/python?  What is the best tool that is stable
I can use?  I am looking into using wxDesigner with maybe Wing or
Komodo.
What do you guys think?



From cygnus at cprogrammer.org  Thu Jan 29 23:44:47 2004
From: cygnus at cprogrammer.org (Jonathan Daugherty)
Date: Thu, 29 Jan 2004 23:44:47 -0500
Subject: wxPython: images from URLs
In-Reply-To: <b2nj109c414ish57m4s26p1vj4apitn96l@4ax.com>
References: <mailman.810.1075149139.12720.python-list@python.org>
	<fgse10l8pae12p0els55fsujllq2irrj0l@4ax.com>
	<84fc4588.0401280613.771ac07@posting.google.com>
	<mailman.931.1075308709.12720.python-list@python.org>
	<b2nj109c414ish57m4s26p1vj4apitn96l@4ax.com>
Message-ID: <20040130044446.GA30604@mail.theserver.ath.cx>

# Why wouldn't you use wxBitmapFromImage?

The api docs suggest that using the wxBitmap(image) constructor
is better.  Besides: this is beside the point -- this code fails:

  stream = cStringIO.StringIO(imgdata)
  imgobj = wx.wxImage(stream)

The second line raises a TypeError: "String or Unicode type
required."

-- 

  Jonathan Daugherty
  http://www.cprogrammer.org

  "It's a book about a Spanish guy called Manual, you should read it."
                                                            -- Dilbert



From ptmcg at users.sourceforge.net  Thu Jan 22 16:19:07 2004
From: ptmcg at users.sourceforge.net (Paul McGuire)
Date: Thu, 22 Jan 2004 21:19:07 GMT
Subject: Ordered dictionary?
References: <leWPb.231$af7.162835@newshog.newsread.com>
Message-ID: <f7XPb.9179$7D.3428@fe2.texas.rr.com>

"Leif K-Brooks" <eurleif at ecritters.biz> wrote in message
news:leWPb.231$af7.162835 at newshog.newsread.com...
> I need to associate a string (key) with an integer (value). A dictionary
> would do the job, except for the fact that it must be ordered. I also
> need to look up the value for a specific key easily, so a list of tuples
> wouldn't work.
>
If you really need to access the dictionary in sorted key order, is this so
difficult?

    dKeys = d.keys()
    dKeys.sort()
    for k in dKeys:
        # do stuff with k and d[k], such as:
        print k, "=", d[k]

Or if you are worried about updates to d between the time of key retrieval
and time of traversal (for instance, if a separate thread were to delete one
of the keyed entries), take a snapshot as a list:

    dItems = d.items()   # from here on, you are insulated from changes to
dictionary 'd'
    dItems.sort()       # implicitly sorts by key
    dItems.sort( lambda a,b: a[1]-b[1] )  # sorts by value, if you so prefer
    for k,v in dItems:
        # do stuff with k and v, such as:
        print k, "=", v         # <-- added benefit here of not re-accessing
the list by key

-- Paul




From mwh at python.net  Tue Jan 13 05:58:11 2004
From: mwh at python.net (Michael Hudson)
Date: Tue, 13 Jan 2004 10:58:11 GMT
Subject: Python is far from a top performer according to benchmarktest...
References: <ZGsHWLAELyAAFw4h@jessikat.fsnet.co.uk>
	<mailman.310.1073949030.12720.python-list@python.org>
	<WgRkPUAyD0AAFwa2@jessikat.fsnet.co.uk>
Message-ID: <m33cakyv24.fsf@pc150.maths.bris.ac.uk>

Robin Becker <robin at jessikat.fsnet.co.uk> writes:

> this was also my understanding, the difficulty is that humans can't do
> the correct analysis in their heads for all, but the most simple
> programs. I seem to remember that almost all the compilers I used had
> mechanisms for turning off the most aggressive optimisations so if the
> card deck suddenly started working with them off then you could try and
> figure out what was wrong. Another nastiness was that by putting prints
> in you often disrupted the optimisations and the values you got printed
> seemed to indicate everything was fine.

This last point is true in C, too, particularly with floating point
code on x86: turn optimization off or put in debugging prints and then
the floats get rounded to C doubles (64 bytes) frequently; don't, and
they stay as 80 bit values in the FPU for longer.  This can lead to
differing behaviour (and thus programmer insanity).

Cheers,
mwh

-- 
41. Some programming languages manage to absorb change, but
    withstand progress.
  -- Alan Perlis, http://www.cs.yale.edu/homes/perlis-alan/quotes.html


From martin at v.loewis.de  Mon Jan 26 01:11:58 2004
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 26 Jan 2004 07:11:58 +0100
Subject: xrange not hashable - why not?
In-Reply-To: <mailman.781.1075076654.12720.python-list@python.org>
References: <20040125144724.GA13741@nl.linux.org>	<40145A07.2070906@zephyrfalcon.org>	<20040126001145.GB2593@unpythonic.net>
	<mailman.781.1075076654.12720.python-list@python.org>
Message-ID: <bv2b3c$1pb$06$2@news.t-online.com>

Hans Nowak wrote:

> (C:\) $ python22
> Python 2.2.2 (#37, Oct 14 2002, 17:02:34) [MSC 32 bit (Intel)] on win32
> Type "help", "copyright", "credits" or "license" for more information.
>  >>> hash(xrange)
> 503376880

You shouldn't hash the xrange function, but instance of the xrange type.

Regards,
Martin



From michael at foord.net  Mon Jan 26 06:21:15 2004
From: michael at foord.net (Fuzzyman)
Date: 26 Jan 2004 03:21:15 -0800
Subject: Dateutils, ConfigObj, StandOut, CGI-News..........
Message-ID: <8089854e.0401260321.3580d924@posting.google.com>

A few functions I'm 'making available' (FWIW) and also a new project
I'm starting....

http://www.voidspace.org.uk/atlantibots/pythonutils.html

Slight updates to ConfigObj and StandOut (simple config parser and
flexible output object) - bugfixes and addition of a coupel of
features to ConfigObj.

Dateutils - These are various functions for dealing with dates
(including leap years and so on). Useful especially for situations
where you have to arrange appointments. (e.g. second Tuesday of the
month etc...)

CGI-News - start of a project to give me NNTP access via HTTP (CGI)...
I've done proof of concept and got it online - see the subject lines
of the last ten posts to comp.lang.python :-)

Feedback welcome...

Fuzzyman

-- 

http://www.Voidspace.org.uk 
The Place where headspace meets cyberspace. Online resource site -
covering science, technology, computing, cyberpunk, psychology,
spirituality, fiction and more.

---
http://www.atlantibots.org.uk
http://groups.yahoo.com/group/atlantis_talk/
Atlantibots - stomping across the worlds of Atlantis.
Building with Python - programming language that rules the world.
---
http://www.fuchsiashockz.co.uk   
http://groups.yahoo.com/group/void-shockz
---

Everyone has talent. What is rare is the courage to follow talent
 to the dark place where it leads. -Erica Jong
Ambition is a poor excuse for not having sense enough to be lazy.
         -Milan Kundera


From tottinge at indy.rr.com  Thu Jan 29 00:04:22 2004
From: tottinge at indy.rr.com (Tim Ottinger)
Date: Thu, 29 Jan 2004 05:04:22 GMT
Subject: "static" checking
References: <160Sb.19106$fo1.10783@newssvr25.news.prodigy.com>
Message-ID: <pan.2004.01.29.04.48.54.280108@indy.rr.com>

On Thu, 29 Jan 2004 04:37:17 +0000, Moosebumps wrote:

> I'm wondering what kind of checking I can do on a python program before
> running it (besides reading over every line). 

Check in IDLE isn't bad. I'm not sure what it's running. I know that it
runs tabnanny and probably runs pychecker also. Pychecker is quite handy.

Tim Ottinger



From max at alcyone.com  Fri Jan 16 23:27:58 2004
From: max at alcyone.com (Erik Max Francis)
Date: Fri, 16 Jan 2004 20:27:58 -0800
Subject: YA string interpolation and printing idea
References: <7x3caf5mga.fsf_-_@ruckus.brouhaha.com>
Message-ID: <4008B9CE.CC140EF@alcyone.com>

Paul Rubin wrote:

> How about adding a string interpolation method ...

You already have one with the % operator:

	"hello %(name)s" % locals()

> ... and a some print
> methods to strings.

Why in the world would you want that?  Printing methods go on the things
that do work of printing, which are file-like objects, not strings. 
And, on file-like objects, that method is called `write'.

-- 
 __ Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
/  \ San Jose, CA, USA && 37 20 N 121 53 W && &tSftDotIotE
\__/ It comes from inside, and that's what I consider to be soul music.
    -- Sade Adu


From claird at lairds.com  Wed Jan 14 16:00:04 2004
From: claird at lairds.com (Cameron Laird)
Date: Wed, 14 Jan 2004 21:00:04 -0000
Subject: C++ bad-mouthing (was: Why learn Python ??)
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<87brp7agl7.fsf@pobox.com> <7xvfnfmzy8.fsf@ruckus.brouhaha.com>
	<878yka2sze.fsf@pobox.com>
Message-ID: <100bbekd61fbl53@corp.supernews.com>

In article <878yka2sze.fsf at pobox.com>, John J. Lee <jjl at pobox.com> wrote:
			.
			.
			.
>Not sure what the goals were, but I'm not sure they were to compete
>with Netscape and IE.  CNRI funding -- "R" for research -- seems to
			.
			.
			.
Certainly not the *original* goal, because Grail antedated those latecomers.
-- 

Cameron Laird <claird at phaseit.net>
Business:  http://www.Phaseit.net


From llothar at web.de  Thu Jan  1 17:33:31 2004
From: llothar at web.de (Lothar Scholz)
Date: 1 Jan 2004 14:33:31 -0800
Subject: Rekall Binary
References: <8a27e309.0312310529.3c1f43a8@posting.google.com>
	<bsvel2$4n2$1@news.nems.noaa.gov>
	<8a27e309.0401010633.20271486@posting.google.com>
Message-ID: <6ee58e07.0401011433.5ce91221@posting.google.com>

> 
> How strong a buisness model is GPL software is a relative issue.  If
> you mean making the kind of money that software developer houses used
> to make in the BOS (Before Open Source) days then it isn't.  But you
> just may be able to support your family on it and pay the rent (and
> maybe even buy a modest house if you are really successful).  I see
> nothing wrong with that.  This are hard times you know.

"The Kompany" wasn't able to pay the developer for month with non GPL
software, why do you think they can do it with GPL now (if you say
yourself that it will be less then in the BOS days) ?

In fact i believe that a main stream desktop tool like "Rekall" has no
future when it must live on support contracts only. If you need
support then the product has an error, but i don't want to use
errounous software. This is the reason why GPL does not work for a lot
of software products.


From jcarlson at nospam.uci.edu  Fri Jan 30 15:30:22 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Fri, 30 Jan 2004 12:30:22 -0800
Subject: PEP 327: Decimal Data Type
In-Reply-To: <mailman.1054.1075487007.12720.python-list@python.org>
References: <mailman.1054.1075487007.12720.python-list@python.org>
Message-ID: <bvef14$919$1@news.service.uci.edu>

> (In my dreams) I want to "float" to be decimal. Always. No more binary.
> Maybe in ten years the machines will be as fast as is needed to make this
> posible. Or it'll be implemented in hardware. 
> 
> Anyway, until then I'm happy having decimal floating point as a module.


In my dreams, data is optimally represented in base e, and every number 
is represented with a roughly equivalent amount of fudge-factor (except 
for linear combinations of the powers of e).

Heh, thankfully my dreams haven't come to fuition.


While decimal storage is useful for people and money, it is arbitrarily 
limiting.  Perhaps a generalized BaseN module is called for.  People 
could then generate floating point numbers in any base (up to perhaps 
base 36, [1-9a-z]).  At that point, having a Money version is just a 
specific subclass of BaseN floating point.

Of course then you have the same problem with doing math on two 
different bases as with doing math on rational numbers.  Personally, I 
would more favor a generalized BaseN class than just a single Base10 class.

  - Josiah


From max at alcyone.com  Thu Jan 22 22:15:33 2004
From: max at alcyone.com (Erik Max Francis)
Date: Thu, 22 Jan 2004 19:15:33 -0800
Subject: I support PEP 326
References: <mailman.654.1074788734.12720.python-list@python.org>
	<401081A1.E4C34F00@alcyone.com>
	<qnky8rzid3y.fsf@arbutus.physics.mcmaster.ca>
Message-ID: <401091D5.EFA41F7@alcyone.com>

"David M. Cooke" wrote:

> Or, expressing the idea that they're the ends of a number line:
> 
> PosInf, NegInf
> PosInfinity, NegInfinity
> PositiveInfinity, NegativeInfinity
> 
> If IEEE floating point was done correctly everywhere, I'd say make
> them the corresponding floating-point constants (Inf+ and Inf-).

The "if" conditional here is bad.  Naming something "infinity" if it
weren't the IEEE floating point constants as well would be seriously
misleading.

After all, this _isn't_ a number line since we're talking about
comparing arbitrary objects.

> Or,
> FreakingHuge, FreakingHugeTheOtherWay

Don't be silly; that latter one should be FreakingUnhuge :-).

-- 
 __ Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
/  \ San Jose, CA, USA && 37 20 N 121 53 W && &tSftDotIotE
\__/ Things are as they are because they were as they were.
    -- Thomas Gold


From BrenBarn at aol.com  Wed Jan 28 13:25:58 2004
From: BrenBarn at aol.com (OKB (not okblacke))
Date: 28 Jan 2004 18:25:58 GMT
Subject: Curious string behavior
References: <mailman.934.1075310668.12720.python-list@python.org>
Message-ID: <Xns947E6A1ABDF52OKB@130.133.1.4>

mark wrote:

> address2 = ' '
> line = 'function, dealer, type, firstname, lastname, vin, blank'
> print 'Address2 Type (first check): ', type(address2)
> function, dealer, type, firstname, lastname, vin, blank =
> # ^ LINE ABOVE CONTAINS ERROR
> string.split(line, ',')
> print 'Address2 type (second check): ', type(address2)
<snip>  
> Address2 Type (first check):  <type 'str'>
> Address2 type (second check): 
> Traceback (most recent call last):
>   File
> "C:\PROGRA~1\Python\lib\site-packages\Pythonwin\pywin\framework\scri
> ptut ils.py", line 310, in RunScript
>     exec codeObject in __main__.__dict__
>   File "C:\Program Files\Python\test1.py", line 7, in ?
>     print 'Address2 type (second check): ', type(address2)
> TypeError: 'str' object is not callable

    	In the marked line, you assign a string to a variable called 
"type".  This means that you overwrote your reference to the type 
function that you are trying to use in type(address2).  When you "call" 
type(address2) you are now trying to call the string which you have 
assigned to the name "type".  Use a different name for your variable (a 
name that the library doesn't use) and you will be fine.

-- 
--OKB (not okblacke)
"Do not follow where the path may lead.  Go, instead, where there is
no path, and leave a trail."
	--author unknown


From nuffsaid at phreaker.net  Sat Jan 31 17:21:38 2004
From: nuffsaid at phreaker.net (Nuff Said)
Date: Sat, 31 Jan 2004 23:21:38 +0100
Subject: wxPython documentation
References: <401c25a3$0$11357$636a55ce@news.free.fr>
Message-ID: <pan.2004.01.31.22.21.36.998102@phreaker.net>

On Sat, 31 Jan 2004 23:01:07 +0100, Olivier wrote:

> Where could I find a good documentation about wxPython (a documentation
> which is not for C++ !!!)

You will find a lot of stuff (including a tutorial) on the
wxPython wiki:

	http://wiki.wxpython.org/

Moreover, the source code of the demos coming with wxPython
is very helpful for many people.

But don't give up on the C++ documentation; you will need it
when you want to do more advanced stuff with wxPython (and it
isn't really hard to translate from C++ to Python in that case).

HTH / Nuff



From elainejackson7355 at home.com  Sat Jan 31 00:23:24 2004
From: elainejackson7355 at home.com (Elaine Jackson)
Date: Sat, 31 Jan 2004 05:23:24 GMT
Subject: newbie py2exe difficulty
References: <PsoSb.329649$JQ1.232982@pd7tw1no>
	<mailman.1028.1075452591.12720.python-list@python.org>
Message-ID: <gZGSb.342632$X%5.30557@pd7tw2no>

Thanks for your help. Everything's cool now.

"Mike C. Fletcher" <mcfletch at rogers.com> wrote in message
news:mailman.1028.1075452591.12720.python-list at python.org...
| Open a command-prompt window. (You'll find the command-prompt's icon in
| Start|Programs or Start|Programs|Accessories, it may be called "MSDOS
| Prompt".)
|
| Switch to the directory where your setup.py file is (use the shell's cd
| command to move between directories, you can use the "dir" command to
| see what files are in the current directory to confirm that the setup.py
| file is present),
|
|         P:\>cd OpenGLContext
|
|         P:\OpenGLContext>dir setup.py
|          Volume in drive P is DATASTORE
|          Volume Serial Number is 74A4-1C80
|
|          Directory of P:\OpenGLContext
|
|         27/01/2004  06:01p               3,853 setup.py
|                        1 File(s)          3,853 bytes
|                        0 Dir(s)  11,575,771,136 bytes free
|
| *then* run:
|
|         python setup.py py2exe --help
|
| from that command prompt.  You may need to specify the full path to
| python if you haven't added your python installation directory to the
| path, something like:
|
|         P:\OpenGLContext>c:\bin\lang\py23\python.exe setup.py build
|         running build
|         running build_py
|         running build_ext
|
| depending on where you installed python.
|
| HTH, and good luck,
| Mike
|
|
| Elaine Jackson wrote:
|
| >Hi. I'm trying to use py2exe
(http://starship.python.net/crew/theller/py2exe/)
| >in Windows 98. I copied the necessary files into my Python23 directory (where
I
| >
| >
| ...
|
| >My problem is that, when I attempt to follow the first instruction (details
| >follow), it opens a DOS window that may indeed display all available
| >command-line flags to the py2exe command, but isn't very helpful because it
| >immediately disappears. (In fact I'm really not sure what a command-line flag
| >is, or what I'm supposed to do with it.) I've also tried simply running
| >setup.py: the DOS window disappeared immediately and there was no 'dist'
| >directory in evidence.
| >
| >
| ...
|
| _______________________________________
|   Mike C. Fletcher
|   Designer, VR Plumber, Coder
|   http://members.rogers.com/mcfletch/
|
|
|




From peter at engcorp.com  Wed Jan 21 09:20:32 2004
From: peter at engcorp.com (Peter Hansen)
Date: Wed, 21 Jan 2004 09:20:32 -0500
Subject: Reading BLOB
References: <400e3510.18785312@news.eunet.be>
Message-ID: <400E8AB0.9D4DEB79@engcorp.com>

Johan Vervoort wrote:
> 
> How can I read a binary value from a blob via ODBC (Microsoft VFP
> driver-win32all)? The value seems to be truncated at the first '\0'

Maybe posting a very small snippet of code which reproduces the
problem would help get you responses.  I can't help, as I don't
know what VFP driver-win32all is, but if there was example code I
might be able to see the problem anyway, and others more expert in
this area would likely see the problem right away.

-Peter


From skip at pobox.com  Fri Jan  9 11:12:06 2004
From: skip at pobox.com (Skip Montanaro)
Date: Fri, 9 Jan 2004 10:12:06 -0600
Subject: Database interfacing
In-Reply-To: <3FFECC82.20305@fibrespeed.net>
References: <3FFECC82.20305@fibrespeed.net>
Message-ID: <16382.53974.902208.708653@montanaro.dyndns.org>


    Michael> I'm working with databases (MySQL primarily) more and more with
    Michael> Python, and having used PERL in the past for similar work, I'm
    Michael> wondering if there are good tools for doing 'intelligent'
    Michael> selects/inserts to/from dictionaries, etc.  

Perhaps you'd be interested in object-relational mappers.  Search for
"relation" on PyPi's database topics page:

    http://www.python.org/pypi?:action=browse&asdf=256

Slo[



From chouyiyu at hotmail.com  Tue Jan 13 16:10:06 2004
From: chouyiyu at hotmail.com (Yi-Yu Chou)
Date: Tue, 13 Jan 2004 21:10:06 +0000
Subject: Build vtk classes - HELP !!!
Message-ID: <BAY8-F57bU5FWcwg8sc0001ff45@hotmail.com>

Hi all python users,

I am trying t build my own vtk classes and use them in python but I 
encounter some problems.
I tried to change the example a little bit in 
VTK/Example/Build/vtkMy/Common/

// vtkBar.h
#ifndef __vtkBar_h
#define __vtkBar_h
#include "vtkObject.h"
#include "vtkmyCommonWin32Header.h"

class VTK_MY_COMMON_EXPORT vtkBar : public vtkObject
{
public:
  static vtkBar *New();
  vtkTypeRevisionMacro(vtkBar,vtkObject);
  int inData;
  int outData;
protected:
  vtkBar() ;
  ~vtkBar() ;
private:
  vtkBar(const vtkBar&);  // Not implemented.
  void operator=(const vtkBar&);  // Not implemented.
};
#endif 

// vtkBar.cxx
#include "vtkBar.h"
#include "vtkObjectFactory.h"

vtkCxxRevisionMacro(vtkBar, "$Revision: 1.3 $");
vtkStandardNewMacro(vtkBar);
vtkBar::vtkBar()
{
  this->inData = 0;
  this->outData = 0;
}

vtkBar::~vtkBar()
{
}
...............................................................................................................................


Under /VTK/Example/Build/vtkMy
I ran : ccmake . 
Press "c" twice, then press "g"
Enter : make
Go to /vtkMy/bin
Ran : python
>>> from vtk import *
>>> from libvtkmyCommonPython import *
>>> A = vtkBar()
>>> A.inData
Then I got the following error message :
AttributeError: inData 
What's wrong with my procedure.....??????
Please help me !!!
Thanks a lot !!

Best,
YY

_________________________________________________________________
????????MSN ?????? Match.com ????????????????
? http://match.msn.com.tw 




From newz at rekon.org.NOSPAM  Sat Jan 17 20:40:19 2004
From: newz at rekon.org.NOSPAM (Wil Schultz)
Date: Sat, 17 Jan 2004 17:40:19 -0800
Subject: Best way to do this?
In-Reply-To: <mailman.462.1074381939.12720.python-list@python.org>
References: <100jg9er3qak890@corp.supernews.com>
	<mailman.462.1074381939.12720.python-list@python.org>
Message-ID: <100jopnkursdf5f@corp.supernews.com>

Well, not quite that far yet but apparently there are a few different 
way's. Mine of course being the most primitive! ;)

Thank you both!

Wil
my 2?
"When everything seems to be going well, you have obviously overlooked
something."


Jeff Epler wrote:
> def getpass(password, count=3):
> 	for i in range(count):
> 		p = raw_input("Password: ")
> 		if p == password: return 1
> 	return 0
> 
> No need to initialize count to 0 and use a while loop, use a "for" loop
> instead.  No need to initialize password above the loop (and if you had
> to, use None instead of "null"), and no need to set count to 3 when the
> correct password is entered---just use return or break.
> 
> Jeff
> 


From bignose-hates-spam at and-benfinney-does-too.id.au  Wed Jan 21 21:59:47 2004
From: bignose-hates-spam at and-benfinney-does-too.id.au (Ben Finney)
Date: 22 Jan 2004 13:49:47 +1050
Subject: python said : "1, 2, 3, 6, 7, manbo !"
References: <pan.2004.01.21.20.53.18.750567@address.com>
	<400F3D90.2176087B@alcyone.com>
Message-ID: <slrnc0ugaj.flo.bignose-hates-spam@iris.polar.local>

On Wed, 21 Jan 2004 19:03:44 -0800, Erik Max Francis wrote:
> You are iterating over a mutable sequence while you are mutating it.
> That is a big no-no.

Got a pointer to somewhere that says so?  Or at least describes the
expected behaviour for iteration over mutable types?

-- 
 \         "Love is the triumph of imagination over intelligence."  -- |
  `\                                                  Henry L. Mencken |
_o__)                                                                  |
Ben Finney <http://bignose.squidly.org/>


From none at none.com  Tue Jan  6 15:25:11 2004
From: none at none.com (Derek)
Date: Tue, 6 Jan 2004 15:25:11 -0500
Subject: Iterating over a binary file
Message-ID: <btf5j8$6g26f$1@ID-46268.news.uni-berlin.de>

Pardon the newbie question, but how can I iterate over blocks of data
from a binary file (i.e., I can't just iterate over lines, because
there may be no end-of-line delimiters at all).  Essentially I want to
to this:

f = file(filename, 'rb')
data = f.read(1024)
while len(data) > 0:
    someobj.update(data)
    data = f.read(1024)
f.close()

The above code works, but I don't like making two read() calls.  Any
way to avoid it, or a more elegant syntax?  Thanks.




From premshree_python at yahoo.co.in  Fri Jan  9 11:22:06 2004
From: premshree_python at yahoo.co.in (=?iso-8859-1?q?Premshree=20Pillai?=)
Date: Fri, 9 Jan 2004 16:22:06 +0000 (GMT)
Subject: Py Website
Message-ID: <20040109162206.71702.qmail@web8307.mail.in.yahoo.com>

Thought I'd let you'll know about the Python section
that I maintain at my website:
http://premshree.resource-locator.com/python.htm

-Premshree

________________________________________________________________________
Yahoo! India Mobile: Download the latest polyphonic ringtones.
Go to http://in.mobile.yahoo.com



From swalters_usenet at yahoo.com  Wed Jan 14 04:27:41 2004
From: swalters_usenet at yahoo.com (Samuel Walters)
Date: Wed, 14 Jan 2004 09:27:41 GMT
Subject: Inserting while itterating
References: <pan.2004.01.14.08.43.00.894047@thomas-guettler.de>
Message-ID: <pan.2004.01.14.09.26.15.925451@yahoo.com>

| Thomas Guettler said |

> Hi,
> 
> Simple excerise:
> 
> You have a sorted list of integers:
> l=[1, 2, 4, 7, 8, 12]
> 
> and you should fill all gaps:
> 
> result == [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]
> 
> How would you code this?
> 
> Constrain: The original list should be changed, don't create a copy.
> 
>   thomas

The word "exercise" raises my suspicions that this is a homework problem.
You know you only cheat yourself when you ask others to do your homework.

#simple, but only works for ints
l = [1, 2, 4, 7, 8, 12]
l = range(l[0],l[-1]+1)
print l


#naive, but broader
#only use when sorting is cheap.
l = [1, 2, 4, 7, 8, 12]
#iterate through each possible item.
for x in range(l[0],l[-1]+1): 
    if x not in l:
        l.append(x)
l.sort()
print l


#missing-merge: more general pattern
#useful for strange, hard to sort data:
#where sorting is expensive, 
#but comparison is cheap.
l = [1, 2, 4, 7, 8, 12]
missing = []
#iterate through each possible item
for x in range(l[0], l[-1]+1):
    #build a list of each missing item.
    if x not in l:
        missing.append(x)
#merge the two lists
for x in range(0, len(l) + len(missing) - 1):
    if l[x] > missing[0]:
        l = l[:x] + missing[0:1] + l[x:]
        missing.pop(0)
print l

Sam Walters.

-- 
Never forget the halloween documents.
http://www.opensource.org/halloween/
""" Where will Microsoft try to drag you today?
    Do you really want to go there?"""



From tommie at iae.nl  Mon Jan 26 20:38:04 2004
From: tommie at iae.nl (tommie at iae.nl)
Date: Tue, 27 Jan 2004 02:38:04 +0100 (CET)
Subject: ***SPAM?*** vvpezyy
In-Reply-To: <20040127013755.5612C2F19F@relay3.vianetworks.nl>
References: <20040127013755.5612C2F19F@relay3.vianetworks.nl>
Message-ID: <20040127013804.91EB92AA62@mailhub4.vianetworks.nl>

This account will cease to exist on:

Dit account wordt opgeheven op:



1 sep 2003



Thomas.



From vjovanovic at houston.rr.com  Sat Jan  3 00:25:11 2004
From: vjovanovic at houston.rr.com (Vojin Jovanovic)
Date: Sat, 03 Jan 2004 05:25:11 GMT
Subject: problem using pickle / cPickle
References: <3FF5CB56.4000309@caltech.edu>
Message-ID: <XmsJb.36992$DC4.12159@fe2.texas.rr.com>

Try it in Python 2.2.

"Jesse Bloom" <bloom at caltech.edu> wrote in message
news:3FF5CB56.4000309 at caltech.edu...
> I keep running into a problem when I use pickle or cPickle to unpickle a
> python object I have serialized from the database.  I read the string
> for the serialized object.  Apparently I am missing an argument?  Here's
> what happens:
>
> cPickle.loads(s)
> Traceback (most recent call last):
>    File "<stdin>", line 1, in ?
> TypeError: __new__() takes exactly 2 arguments (1 given)
>
> Same thing happens when I use pickle:
>
>  >>> pickle.loads(s)
> Traceback (most recent call last):
>    File "<stdin>", line 1, in ?
>    File "/usr/local/lib/python2.3/pickle.py", line 1394, in loads
>      return Unpickler(file).load()
>    File "/usr/local/lib/python2.3/pickle.py", line 872, in load
>      dispatch[key](self)
>    File "/usr/local/lib/python2.3/pickle.py", line 1097, in load_newobj
>      obj = cls.__new__(cls, *args)
> TypeError: __new__() takes exactly 2 arguments (1 given)
>




From michi.goettsche at gmx.de  Thu Jan  1 09:56:09 2004
From: michi.goettsche at gmx.de (Michael_Goettsche)
Date: Thu, 1 Jan 2004 15:56:09 +0100
Subject: Uploading a file with ftplib
In-Reply-To: <hma8vv0hk1e2aeujbgsd5t64p04p90ksfr@4ax.com>
References: <mailman.13.1072964596.12720.python-list@python.org>
	<hma8vv0hk1e2aeujbgsd5t64p04p90ksfr@4ax.com>
Message-ID: <200401011556.09842.michi.goettsche@gmx.de>

On Thursday 01 January 2004 15:14, Rene Pijlman wrote:
> Michael_Goettsche:
> >can anybody please tell me how to upload it properly?
>
> This is a snippet from one of my scripts, that works fine:
>
>     ftp = ftplib.FTP(Hostname,Username,Password)
>     ftp.cwd(WorkingDirectory)
>     ftp.storbinary("STOR " + RemoteZipFile, file(LocalZipFile, "rb"))
>     ftp.quit()
>
> --
> Ren? Pijlman

thank you, works perfect.

regards,
Michael.




From jjl at pobox.com  Fri Jan 23 11:37:08 2004
From: jjl at pobox.com (John J. Lee)
Date: 23 Jan 2004 16:37:08 +0000
Subject: Web board with mailing-list mirror? [was: Re: "Lecture
	Preparation"...]
References: <1010a26.0401212246.3cac7d06@posting.google.com>
	<buomik$k34$1@panix1.panix.com>
Message-ID: <87r7xqbozv.fsf_-_@pobox.com>

aahz at pythoncraft.com (Aahz) writes:
[...]
> While I'm generally interested in such discussions, I won't be
> participating because I hate web boards.

Me too.


> I vastly prefer netnews, with
> grudging use of e-mail lists.
[...]

Surely somebody has written a web board that'll let you subscribe to a
mailing list? (or even read a public IMAP mailbox -- not very popular,
though)

Anybody know of one?


John


From NAIGIMSESRIMAIL at gims.com  Fri Jan 30 10:37:59 2004
From: NAIGIMSESRIMAIL at gims.com (GroupShield for Exchange (ESRIMAIL))
Date: Fri, 30 Jan 2004 17:37:59 +0200
Subject: ALERT -  GroupShield ticket number OB71_1075477076_ESRIMAIL_3 was
	generated
Message-ID: <B06B8FEF47ACD7119E720040F428459101FAF716@ESRIMAIL>

Action Taken:
The message was blocked because of its subject.

To:
python-list at python.org <python-list at python.org>

From:
latex-bugs at latex-project.org <latex-bugs at latex-project.org>

Sent:
154799872,29615943

Subject:
Re: hello

Attachment Details:-

Attachment Name: N/A
File: Infected.msg
Infected? No
Repaired? No
Blocked? Yes
Deleted? No
Virus Name: 



	
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From marco at bubke.de  Tue Jan 20 07:48:42 2004
From: marco at bubke.de (Marco Bubke)
Date: Tue, 20 Jan 2004 13:48:42 +0100
Subject: Pyrex and numarray
References: <buh7to$ldk$1@graf.cs.uni-magdeburg.de>
	<pan.2004.01.20.00.09.15.463837@NOTTHISBIT.webone.com.au>
Message-ID: <buj83b$sop$1@graf.cs.uni-magdeburg.de>

thx

but I need to extract the array to a float*.

I do NA_OFFSETDATA(NA_InputArray(odata, tFloat64, C_ARRAY)) but this isn't
working because Pyrex says he can't storage it. There is a unknown size. I
only need the pointer tp a C array of floats. Thats all.

ragards

Marco




From irmen at -NOSPAM-REMOVETHIS-xs4all.nl  Thu Jan 15 08:07:20 2004
From: irmen at -NOSPAM-REMOVETHIS-xs4all.nl (Irmen de Jong)
Date: Thu, 15 Jan 2004 14:07:20 +0100
Subject: Newbie: how to write modules without C
In-Reply-To: <bu5s3o$70t$1@news.tudelft.nl>
References: <bu5s3o$70t$1@news.tudelft.nl>
Message-ID: <40069088$0$327$e4fe514c@news.xs4all.nl>

Maarten van Reeuwijk wrote:

> 1) Is it necessary to resort to C when writing modules or can you use normal
> Python?

Absolutely not! I'm wondering what you've read that made you think this.
That text should be rewritten to be more clear: you write
*extension modules* in C (or C++). 'normal' modules are just Python files.

For example: Python's standard library is hundreds of modules written in
pure Python... (and also a bunch of extension modules written in C, for
various reasons).

> 2) How do you load a Python script into a python session?

Not sure what you mean here? What's wrong with:

 >>> import MaartensNiceModule

?

> 3) Can various python scripts be combined into a module?

Perhaps you're confusing the concepts of 'script', 'module' and 'package'.
A python 'module' is just a script actually. A 'package' is a special
directory that can contain lots of modules and sub packages.
A Python module can contain lots of classes, function definitions,
and other code. It is not constrained to a single class implementation
like for instance Java has. It's closer to the way C/C++ work with
their source files. And Python packages are related to C++ namespaces,
but more powerful.

I strongly recommend you read chapter 6, Modules, of the tutorial:
http://www.python.org/doc/current/tut/node8.html

Good luck!

--Irmen de Jong.


From theller at python.net  Tue Jan 27 04:57:44 2004
From: theller at python.net (Thomas Heller)
Date: Tue, 27 Jan 2004 10:57:44 +0100
Subject: Py2exe and WMI module
References: <mailman.837.1075193674.12720.python-list@python.org>
Message-ID: <k73dvhlz.fsf@python.net>

Tim Golden <tim.golden at viacom-outdoor.co.uk> writes:

> While I'm on the subject, is there anything I can offer to do within
> the wmi module itself which will make it easier to py2exe it? It
> doesn't look like it, but I thought I'd make the offer.
>

In wmi.py probably.  If it turns out that py2exe'ing the wmi module is
difficult, you could create a page somewhere in the py2exe wiki:

http://starship.python.net/crew/theller/moin.cgi/Py2Exe

Thomas


From ketulp_baroda at yahoo.com  Thu Jan 15 00:51:39 2004
From: ketulp_baroda at yahoo.com (ketulp_baroda at yahoo.com)
Date: 14 Jan 2004 21:51:39 -0800
Subject: what is best for web development??
References: <f046efac.0401100358.5aa812a0@posting.google.com>
	<87oet9grqy.fsf@blakie.riol>
	<e9570f37.0401121052.ed79710@posting.google.com>
	<6ee58e07.0401140638.672d50a7@posting.google.com>
	<100b4qoeeeq7d57@corp.supernews.com>
Message-ID: <f046efac.0401142151.45ece1a3@posting.google.com>

We're not considering a self-contained Web application, including the
Web server itself. The Web server could be any Apache , IIS or the
python ones. It depends on the customer.

claird at lairds.com (Cameron Laird) wrote in message news:<100b4qoeeeq7d57 at corp.supernews.com>...
> In article <6ee58e07.0401140638.672d50a7 at posting.google.com>,
> Lothar Scholz <llothar at web.de> wrote:
> >graham__fawcett at hotmail.com (Graham Fawcett) wrote in message
> >news:<e9570f37.0401121052.ed79710 at posting.google.com>...
> >> Wilk <wilkSPAM at OUTflibuste.net> wrote in message news:<87oet9grqy.fsf at blakie.
>  
> >> If it has to be a one-shot install, I would suggest a Web server
> >> written in Python -- Medusa or Twisted, probably -- that you could
> >> bundle with your Python app. Find a Web app framework that (a) works
> >> on Medusa or Twisted and (b) has the templating features you
> >> require/desire.
> >
> >I would not recommend this. A distribution with an own apache server
> >seems to be the best. It is easy to hide the setup and the customers
> >know that there is a good working technologie behind the scenes. And
> >it can be managed by every normal administrator. This is a very
> >important point for larger customers.
> >
> >I would recommend webware+Fun Form Kit+cheeta together with apache.
> 
> I'm unsure what you're recommending.  We're considering a self-contained
> Web application, including the Web server itself.  Are you proposing:
> 1.  An installer which does a conventional Apache 
>     installation, except with enough stuff confi-
>     gured so it comes up in a safe state, PLUS
>     a separate installation segment just for the
>     Python-based part; or
> 2.  A custom installer which knows internal details
>     of both Apache and the Python-based application?
> 
> What advantage do you see for either of these over the pure-Python ap-
> proach suggested above?  Is your point that customers feel more 
> comfortable with "Apache inside"?


From jcarlson at uci.edu  Tue Jan 20 21:27:55 2004
From: jcarlson at uci.edu (Josiah Carlson)
Date: Tue, 20 Jan 2004 18:27:55 -0800
Subject: Help, *.CHM, etc
References: <90f2d9db.0401201803.6f2adbf8@posting.google.com>
	<20040120181009.060C.JCARLSON@uci.edu>
Message-ID: <20040120182610.060F.JCARLSON@uci.edu>

> Personally, I would suggest:
> os.startfile("c:\\path\\help.chm")
> 
> It is documented to do exactly what you want it to do, open up the help
> file with the microsoft help file viewer.

That is, if .chm files are associated with the microsoft help file
viewer.

Technically os.system("c:\\path\\help.chm") and
os.system("start c:\\path\\help.chm") also work, though are less
intuitive.

 - Josiah


From francisgavila at yahoo.com  Mon Jan 12 14:47:07 2004
From: francisgavila at yahoo.com (Francis Avila)
Date: Mon, 12 Jan 2004 14:47:07 -0500
Subject: Using switches with exec?
References: <mailman.300.1073927250.12720.python-list@python.org>
Message-ID: <1005ufs36m9n5fd@corp.supernews.com>

Premshree Pillai wrote in message ...
> --- "Diez B. Roggisch" <nospam-deets at web.de> wrote: >
>> I need to run a Python program dynamically within
>> > another program. I am using exec for the purpose.
>> Is
>> > there a way to pass parameter switches to exec?
>>
>> You can pass a globals-dictionary to exec, which can
>> hold the switches
>> values.
>>
>> Diez
>> --
>> http://mail.python.org/mailman/listinfo/python-list
>
>Could you please elucidate with a sample script.
>Suppose I need to pass the switch "-w" to the
>dynamically loaded code (using eval()/exec()).
>Any help is appreciated.
>
>-Premshree
>

What do you mean by a parameter switch?  You mean a command-line switch?

If this is what you mean, it seems you're mixing concepts.  If you run the
Python program as an external program, just do so using os.system or
os.popen or such--the fact that it's written in Python makes no difference,
and exec/execfile is not involved. os.system('python mypythonprg -w'), for
example.

If you want to have Python code from one program exposed to another, the
best approach is to write a module which can be used either as a library or
a stand-alone program.  The idiom is to put something like this:

if __name__ == '__main__': main()

at the bottom of your code.  When you run this file alone, main() will be
executed; if you import the file, it won't be.

If you really need to execute external Python code internally (and it's very
rare and special circumstances where you'd want to), use execfile().

Now, if you're using execfile, it is unlikely that the code you're running
would use command line switches--this implies that it's a stand-alone
program, in which case you should either be running it externally (as in
first solution above) or importing it, and providing a mechanism to use it
programmatically.  This is why I say you seem to be mixing concepts.

That said, command line arguments are available via sys.argv, and this is
most likely how the external program accesses them.  You can modify sys.argv
before execfile().

This, however, is a mess, because you clobber the global sys.argv of the
original program.  You need to somehow redirect any access to sys.argv by
the script.  You can do so like this:

>>> sys.argv
['']
>>> class ShadowObject(object):
...     def __init__(self, shadowed, **override):
...         """Shadow attr access to shadowed with override."""
...         self.__dict__.update(override)
...         self.shadowed = shadowed
...     def __getattr__(self, attr):
...         """Called only if attr was not in override."""
...         return getattr(self.shadowed, attr)
...
>>> exec '''print sys.argv          #We get the right one?
... print sys.getdefaultencoding()  #Make sure we're shadowing.
... sys.argv = sys.argv[-1:]        #Test reassignments.
... print sys.argv
... ''' in globals(), {'sys':ShadowObject(sys, argv=['progname','-w'])}
['progname', '-w']
latin-1
['-w']
>>> sys.argv # the real sys.argv is unchanged
['']

Don't do this.  It's almost certainly not the best way to do what you want.
Why don't you tell us your broader task, and maybe we can suggest something
more Pythonic?
--
Francis Avila



From andymac at bullseye.apana.org.au  Sun Jan 25 19:50:59 2004
From: andymac at bullseye.apana.org.au (Andrew MacIntyre)
Date: Mon, 26 Jan 2004 11:50:59 +1100 (EST)
Subject: xrange not hashable - why not?
In-Reply-To: <20040126105606.F83014@bullseye.apana.org.au>
References: <20040125144724.GA13741@nl.linux.org>
	<20040126105606.F83014@bullseye.apana.org.au>
Message-ID: <20040126114346.B83462@bullseye.apana.org.au>

On Mon, 26 Jan 2004, Andrew MacIntyre wrote:

> On Sun, 25 Jan 2004, Gerrit Holl wrote:
>
> > why is an xrange object not hashable?
>
> xrange() returns an iterator.  iterators seem universally unhashable,
> probably because they can't be deemed "concrete", though I can't find
> anything in the 2.3.3 docs about this - perhaps the relevant PEPs might.

Hmmm... part fact, part BS on my part.

Prior to 2.3, xrange() returned an object that implemented lazy item
access, which didn't have explicit hash support.

With 2.3, xrange() began returning an iterator, which is hashable (as
others have pointed out).

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



From theller at python.net  Fri Jan 16 11:35:30 2004
From: theller at python.net (Thomas Heller)
Date: Fri, 16 Jan 2004 17:35:30 +0100
Subject: Very strange unicode behaviour
References: <uisjbrhre.fsf@inout.no>
Message-ID: <y8s7c0ml.fsf@python.net>

Syver Enstad <syver at inout.no> writes:

> Here's the interactive session
>
> Python 2.2.2 (#37, Oct 14 2002, 17:02:34) [MSC 32 bit (Intel)] on win32
> Type "help", "copyright", "credits" or "license" for more information.
>>>> ord('\xe5')
> 229
>>>> '\xe5'.find(u'')
> -1
>>>> 'p\xe5'.find(u'')
> UnicodeError: ASCII decoding error: ordinal not in range(128)
>>>> 'p\xe4'.find(u'')
> -1
>>>> 'p\xe5'.find(u'')
> UnicodeError: ASCII decoding error: ordinal not in range(128)
>>>> print '\xe5'
> ?
>>>> print 'p\xe5'
> p?
>>>> 'p\xe5'
> 'p\xe5'
>>>> def func():
> ...     try:
> ...         '\xe5'.find(u'')
> ...     except UnicodeError:
> ...         pass
> ...
>>>> func()
>>>> for each in range(1):
> ...     func()
> ...
> UnicodeError: ASCII decoding error: ordinal not in range(128)
>>>>
>
> It's weird that \xe5 throws and not \xe4 but even weirder that the
> exception is not cleared so that the loop reports it.
>
> Is this behaviour the same on Python 2.3?

No, it behaves correctly as it seems:

Python 2.3.3 (#51, Dec 18 2003, 20:22:39) [MSC v.1200 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> ord('\xe5')
229
>>> '\xe5'.find(u'')
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
UnicodeDecodeError: 'ascii' codec can't decode byte 0xe5 in position 0: ordinal not in range(128)
>>> '\xe4'.find(u'')
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
UnicodeDecodeError: 'ascii' codec can't decode byte 0xe4 in position 0: ordinal not in range(128)
>>>

Thomas


From peter at engcorp.com  Thu Jan 15 14:59:56 2004
From: peter at engcorp.com (Peter Hansen)
Date: Thu, 15 Jan 2004 14:59:56 -0500
Subject: Binary strings, unicode and encodings
References: <265368cb.0401151138.37a3a47b@posting.google.com>
Message-ID: <4006F13C.7D432B98@engcorp.com>

Laurent Therond wrote:
> 
> Consider:
> ---
> from cStringIO import StringIO
> 
> def bencode_rec(x, b):
>     t = type(x)
>     if t is str:
>         b.write('%d:%s' % (len(x), x))
>     else:
>         assert 0

The above is confusing.  Why not just do

def bencode_rec(x, b):
    assert type(x) is str
    b.write(.....)

Why the if/else etc?


> def bencode(x):
>     b = StringIO()
>     bencode_rec(x, b)
>     return b.getvalue()
> 
> ---
> Now, if I write bencode('failure reason') into a socket, what will I get
> on the other side of the connection?

This is Python.  Why not try it and see?  I wrote a quick test at
the interactive prompt and concluded that StringIO converts to 
strings, so if your input is Unicode it has to be encodeable or 
you'll get the usual exception.

> a) A sequence of bytes where each byte represents an ASCII character

Yes, provided your input is exclusively ASCII (7-bit) data.

> b) A sequence of bytes where each byte represents the UTF-8 encoding of a
> Unicode character

Yes, if UTF-8 is your default encoding and you're using Unicode input.

> c) It depends on the system locale/it depends on what the site module
> specifies using setdefaultencoding(name)

Yes, as it always does if you are using Unicode but converting to byte strings
as it appears StringIO does.

-Peter


From ebolonev at punkass.com  Mon Jan  5 20:04:13 2004
From: ebolonev at punkass.com (Egor Bolonev)
Date: Tue, 6 Jan 2004 11:04:13 +1000
Subject: python and LAN
References: <bt64pg$3mcjk$1@ID-216132.news.uni-berlin.de>
	<pan.2004.01.05.15.09.42.540921@thomas-guettler.de>
Message-ID: <btd1im$60dad$1@ID-216132.news.uni-berlin.de>

Hello, Thomas!
You wrote  on Mon, 05 Jan 2004 16:09:42 +0100:

TG> What operating system do you use?

winXP, LAN consists of ~300 pc's, 5 segment, Iam not admin

TG> Some systems answer ping to the
TG> broadcast address, but not all

Is there any modules for LAN in python? How to get list of pc's now working?
...
>>> f=open('\\\\DELTA\\upload\\sobaka.swf','rb')
>>> s=f.read()
>>> print s
CWS??
>>> import glob
>>> glob.glob('\\\\delta\\upload\\*')
['\\\\delta\\upload\\RAdmin', '\\\\delta\\upload\\Norton AntiVirus 2002',
'\\\\delta\\upload\\htm', '\\\\delta\\upload\\K&M',
'\\\\delta\\upload\\AVP', '\\\\delta\\upload\\From DemoN',
'\\\\delta\\upload\\From Merkava_Mk4 \xec\xf3\xeb\xfc\xf2\xfb',
'\\\\delta\\upload\\Max Payne 2 Bonus', '\\\\delta\\upload\\Demoscene',
'\\\\delta\\upload\\3DAnalyze',
...

With best regards, Egor Bolonev.  E-mail: ebolonev at rin.ru



From mnations at airmail.net  Mon Jan 26 20:09:49 2004
From: mnations at airmail.net (Marc)
Date: 26 Jan 2004 17:09:49 -0800
Subject: Confusing problem between Tkinter.Intvar() and self declared
	variable class
Message-ID: <4378fa6f.0401261709.664ca799@posting.google.com>

Hi all,

I was using Tkinter.IntVar() to store values from a large list of
parts that I pulled from a list. This is the code to initialize the
instances:

    def initVariables(self):
        self.e = IntVar()

        for part, list in info.masterList.items():
            obj = setattr( self.e, part, IntVar() )

That allowed me to save bundles of info without having to create
another large dictionary or list. I was using the variable in entry
boxes to store the amount of parts ordered:

     Entry( cscGroup.interior(), width=3, textvariable =
getattr(self.e, part),
                           text=e.get()).grid(row=x, column=2, padx=4
)

However, I ran into problems when I tried to pickle the instances in
order to recall them later. To fix that problem I created my own
simple data class that allowed me to save the data the same way while
also having the ability to pickle it:

class DataVar:
    def __init__(self):
        self.data = 0
        self.partName = ""

    def set(self, value):
        self.data = value

    def get(self):
        return self.data

But I just discovered another problem. It doesn't appear to hold data
the same way. The information appeared global when it was IntVar().
Now when I go outside the class that set up the entry boxes, the
information does not appear to be in DataVar. I print out the info the
following way:

    def printValues(self):
        for part, list in info.masterList.items():
            e = getattr(self.e, part)
            print str(part) + " --->" + str( e.get() )

This function is in the same class that initialized the DataVar
variables and also that called the class that setup the window to
enter the amount of parts. When I call that class I pass in the
variable in the following way:

       spares = Spares(self.master, self.e) 

So obviously there's something about Tkinter that causes the info to
be global. But even though the DataVar class is an independent class,
for some reason the information is not being maintained.

Does anyone have any idea why this is happening and how to fix it?

Thanks ahead of time,
Marc


From RAV at ns.artphila.com  Wed Jan 28 03:31:07 2004
From: RAV at ns.artphila.com (RAV at ns.artphila.com)
Date: Wed, 28 Jan 2004 10:31:07 +0200
Subject: RAV AntiVirus scan results
Message-ID: <200401280831.i0S8V7Lr005568@ns.artphila.com>


RAV AntiVirus for Linux i686 version: 8.3.2 (snapshot-20020108)
Copyright (c) 1996-2001 GeCAD The Software Company. All rights reserved.
Registered version for 2 domain(s).
Running on host: ns.artphila.com

-----------------------
 RAV Antivirus results
-----------------------

The infected file was saved to quarantine with name: 1075278667-RAVi0S8V0Lr005555.
The file (part0002:file.zip)->file.pif attached to mail (with subject:MAIL DELIVERY SYSTEM) sent by python-list at python.org to phila at artphila.com, 
is infected with virus: Win32/Mydoom.A at mm.
Cannot clean this file.
Cannot delete this file (most probably it's in an archive).
The mail was not delivered because it contained dangerous code.

------------------------
this is a copy of the e-mail header:




Scan engine 8.11 () for i386.
Last update: Tue Jan 27 05:03:51 2004
Scanning for 89279 malwares (viruses, trojans and worms).

To get a free 60-days evaluation version of RAV AntiVirus v8
(yet fully functional) please visit:

   http://www.ravantivirus.com




From richard.philips at ua.ac.be  Wed Jan 28 11:21:54 2004
From: richard.philips at ua.ac.be (Richard Philips)
Date: Wed, 28 Jan 2004 17:21:54 +0100
Subject: Deprecated modules
Message-ID: <4017E1A2.9090103@ua.ac.be>

Hi,

How can I look for deprecated standard library modules in my scripts 
WITHOUT executing these scripts?


Regards,

Richard

-- 
================================================================
Dr. Richard PHILIPS
University of Antwerp
Systemmanager Anet

Phone: +32 3 820.21.53
Fax:   +32 3 820.21.59
GSM:   0478/36.76.28
Email: Richard.Philips at ua.ac.be
================================================================





From bucodi_no_spam at ahoo.fr  Mon Jan 12 12:17:30 2004
From: bucodi_no_spam at ahoo.fr (Rony)
Date: Mon, 12 Jan 2004 18:17:30 +0100
Subject: Why learn Python ??
References: <40029dad$0$28706$a729d347@news.telepac.pt>
Message-ID: <btukhu$qpj$1@news-reader3.wanadoo.fr>

Group : comp.lang.python

> I have now free time and money to do what I want :-)
> .....

If I would have enough money and free time to do what I want, I would
*stop* programming....
But if you insist on wanting to write software, Python is a **very**
good choice.


-- 
Rony

  /_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/
 /   bucodi_no_spam at yahoo.fr (delete _no_spam)
/
|    www.bucodi.com - My work
\    www.ifrance/karamusic  -- My hobby
 \_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/




From claird at lairds.com  Fri Jan 23 12:36:50 2004
From: claird at lairds.com (Cameron Laird)
Date: Fri, 23 Jan 2004 17:36:50 -0000
Subject: Tkinter color names/codes
References: <Xns94759F3BCD0B7jseale18insightbbcom@204.127.199.17>
	<pan.2004.01.19.21.06.17.957950@phreaker.net>
	<Xns9478E236A5D3Fjseale18insightbbcom@204.127.204.17>
Message-ID: <1012mti57i1nsa5@corp.supernews.com>

In article <Xns9478E236A5D3Fjseale18insightbbcom at 204.127.204.17>,
Jeff Seale  <jseale18 at insightbb.com> wrote:
>Nuff Said <nuffsaid at phreaker.net> wrote in
			.
			.
			.
>> http://wiki.tcl.tk/8606
>>     - list with all named colors in Tcl/Tk
>> 
>> http://wiki.tcl.tk/colors
>>     - W3C names, hex codes and Tcl/Tk names for the 
>>       16 HTML 3.2 colors (i.e. the basic VGA set)
>> 
>> HTH / Nuff
>> 
>
>Is it possible to translate all those colors into their #hex combinations? 
>The ones I know about already are Red #FF0000, Yellow #FFFF00, Green #
>00FF00, Cyan #00FFFF, Blue #0000FF, Magenta #FF00FF, White #FFFFFF and 
>Black #000000.

I'm not sure what you're asking.  The references do just
that, in several variations, although they're coded in
Tcl/Tk, rather than Tkinter.  Do you realize you can type
  $ python
  Python 2.2.1 (#1, Aug 30 2002, 12:15:30)
  [GCC 3.2 20020822 (Red Hat Linux Rawhide 3.2-4)] on linux2
  Type "help", "copyright", "credits" or "license" for more information.
  >>> import Tkinter
  >>> l = Tkinter.Label()
  >>> l.winfo_rgb("red")
  (65535, 0, 0)
  >>>
yourself?
-- 

Cameron Laird <claird at phaseit.net>
Business:  http://www.Phaseit.net


From nospam-deets at web.de  Thu Jan 29 11:18:36 2004
From: nospam-deets at web.de (Diez B. Roggisch)
Date: Thu, 29 Jan 2004 17:18:36 +0100
Subject: Get number of iteration
References: <bvbbd7$9rv$01$1@news.t-online.com>
Message-ID: <bvbbmf$q1bkm$1@ID-111250.news.uni-berlin.de>

> If I iterate through a list, is there a way I can get the number of the
> iteration: first, second, third, ...
> 
> l = ["three", "four", "five", "six"]
> for x in l
>   print x
>   print x.iteration()  # <- That's what I'm looking for!
>   print "next"

No, this won't work - x is the value of the list element, not an c++-like
iterator-object (that has to be dereferenced before accessing the actual
value).

So usually x won't have an iteration-method. But of course you can alwas do
this:

for i in xrange(len(l)):
  x = l[i]
  print x
  print i
  print "next"

Or - if len() can't be applied to your sequence for whatever reason, as it
is e.g. a iterable object, you can of course keep track with your own
counter:

i = 0
for x in some_iterable_thingy:
  print x
  print i
  i += 1
  print "next"

Regards,

Diez


From jjl at pobox.com  Tue Jan 20 13:01:01 2004
From: jjl at pobox.com (John J. Lee)
Date: 20 Jan 2004 18:01:01 +0000
Subject: calling Pyrex results from C
References: <f7tvd1-a1o.ln1@jowls.lairds.org>
Message-ID: <87smiawlcy.fsf@pobox.com>

Kyler Laird <Kyler at news.Lairds.org> writes:
[...]
> This means that I can't, for example, make a function that takes a
> filename (string), uses PIL to do a bunch of operations, and
> returns a string.

I don't see why you shouldn't be able to write a module in Pyrex, then
use standard embedding techniques to embed Python and then call your
module with a few C API calls.  Or do the same, but also write a Pyrex
cdef function to wrap it all up, so you can just call that as a "plain
old" C function instead of those final few C API calls (you'll still
need other embedding calls, of course, to initialise Python, etc.).

Try the pyrex mailing list if you're stuck.

I'd very definitely check to make sure you aren't going to get marked
down for being a smartass, though (even if you're generating C that
doesn't depend on Python at all, it might still be unreadable).


> Any suggestions (besides "suck it up and do it all in C")?

I think I'd do it in C, regardless of whether or not it's allowable to
use Pyrex.


John


From wfolta at netmail.to  Tue Jan 13 23:29:52 2004
From: wfolta at netmail.to (Wayne Folta)
Date: Tue, 13 Jan 2004 23:29:52 -0500
Subject: Python used in Freedom Force
Message-ID: <4BDF2B3C-464A-11D8-B48D-000A959CB2EC@netmail.to>

I don't know if it's been discussed since the game came out a while 
ago, but I was looking through some temp files that were installed with 
the game Freedom Force (a very fun game) and the scenarios are 
programmed in Python! (This is on the Mac, but I assume it also used 
Python on the PC.)

An example of the code is:

def OnPowerup(object, hero):
         if (object == 'powerup5'):
                 speakNoCB('minute_man', 'MISSPCH_1_MM_12')
         elif (object == 'powerup1') or (object == 'powerup6'):
                 speakNoCB('minute_man', 'MISSPCH_1_MM_11')
         Object_SetAttr(object, 'used', 1)
         UpdateTrainArrow(object)

def OnInterrogation(char, hero):
         print 'OnInterrogation'
         Object_SetAttr(char, 'used', 1)
         UpdateTrainArrow(char)
#       kill(char)


:
:

# chase
def startChase(event):
         startPatrol('runfciv', 3, run = 1, priority = ai.goal.PRI_HI)
         addMoveGoal('thugb16', Get_ObjectPos('runfciv'), fn = 
'continueChase')

def continueChase(event):
         addMoveGoal('thugb16', Get_ObjectPos('runfciv'), fn = 
'continueChase')

def endChase(event):
         clearGoals('runfciv')
         speakNoCB('runfciv', 'MISSPCH_1_F1_02')




From mhammond at skippinet.com.au  Thu Jan 15 21:11:14 2004
From: mhammond at skippinet.com.au (Mark Hammond)
Date: Fri, 16 Jan 2004 13:11:14 +1100
Subject: Py2Exe and Outlook (array bounds change!?)
In-Reply-To: <k73vk82k.fsf@python.net>
References: <982e9537.0401130858.4d37dae5@posting.google.com>
	<k73vk82k.fsf@python.net>
Message-ID: <bu7h85$2d9k$3@arachne.labyrinth.net.au>

Thomas Heller wrote:

> hlubocky at uiuc.edu (Brian Hlubocky) writes:
> 
> 
>>This one is really puzzling me. I am not that familiar with COM or
>>py2exe, but I have tested this a fair amount and am pretty sure of
>>what I am about to explain. The MSDN website says that the item list
>>in Outlook has array bounds from 1 to length. Using this information,
>>I wrote a program that adds contacts to outlook using an external
>>database. When I went to try this out with py2exe however, I got an
>>exception.
>>
>>What I found out is that when using py2exe, the bounds on the items
>>list changes from 1 to len, to 0 to len-1. Does anyone have any idea
>>why this might be? It seems goofy that this would happen. Testing is
>>on the developer machine, so I don't think different dlls could be the
>>problem. Thanks!
> 
> 
> Just a wild idea: can it be that you're using makepy generated modules
> in the script, and late bould com in the py2exe'd file?

That will almost certainly be the issue.  The (next/latest/??) version 
of py2exe has full support for including typelib info in your script.

Mark.



From exarkun at intarweb.us  Sun Jan 18 21:12:29 2004
From: exarkun at intarweb.us (Jp Calderone)
Date: Sun, 18 Jan 2004 21:12:29 -0500
Subject: Python Text Adventure Authoring System
In-Reply-To: <bufcp0$h36fj$1@ID-221199.news.uni-berlin.de>
References: <bufcp0$h36fj$1@ID-221199.news.uni-berlin.de>
Message-ID: <20040119021229.GA1104@intarweb.us>

On Sun, Jan 18, 2004 at 05:44:00PM -0800, Zachary wrote:
> Hello,

> I've recently thought of how ideal Python is for the development of what
> used to be called text adventures.  In case any of you don't know, these
> were basically sort of a computer game in which the player guided the
> story by typing in natural language commands, e.g. get ball.
>
> Some popular games of the 1980's include Zork, A Mind Forever Voyaging,
> among others.
>
> I was just wondering if anyone has any module that might help in the
> implementation of a text parser, something to read player commands. My
> idea is to have each room, item, creature, etc.  Be represented as a
> Python instance.
>
> For example, the following code might setup a room class:
>
> class room:
>     def __init__(self, rdesc, exit):
>         self.desc = rdesc
> #Add Other code here
> 
> If anyone has any idea how this might be done, I would love to hear from
> you.
>
> P.S:
>
> I have already seen another text adventure development system written in
> Python, called Paws.  I thought this would be a sort of first project.
> 

  There are a few modules in Twisted's CVS repository that are handy in this
area (as a few people are aware, Twisted is actually a support framework for
multiplayer interactive fiction or text adventure games).  Documentation is
sparse, but much of the code is pretty simple (a *few* parts are mind
bendingly complex, but none of those are related to text parsing ;)

    cvs -d:pserver:anon at cvs.twistedmatrix.com:/cvs co Reality
    cvs -d:pserver:anon at cvs.twistedmatrix.com:/cvs co NewReality
    cvs -d:pserver:anon at cvs.twistedmatrix.com:/cvs co Imagination

  There was also a presentation about Reality at last year's PyCon.  The
paper is available in Twisted CVS (history docs directory), or with viewcvs
at:

    http://cvs.twistedmatrix.com/cvs/doc/historic/2003/pycon/twisted-reality/

  Imagination represents the most current thinking on the topic, but Reality
and NewReality have more infrastructure for actually dealing with user input
(Imagination is like a hyper distillate of our ideas currently, and so can't
be bothered to cover such things as handling user input ;).

  And of course, many of the developers frequent #twisted on irc.freenode.net
and just *love* it when someone wants to talk about Reality instead of boring
things like HTTP and IMAP4 ;)

  Hope this helps,

  Jp



From wfolta at netmail.to  Fri Jan 30 02:12:03 2004
From: wfolta at netmail.to (Wayne Folta)
Date: Fri, 30 Jan 2004 02:12:03 -0500
Subject: Sort by key, then by content
Message-ID: <9A8139BC-52F3-11D8-9115-000A959CB2EC@netmail.to>

As an experiment, I've written a Python script which reads my mailboxes 
and prints a report on how many messages I've gotten from from each 
unique sender. I use a dictionary with a key of the email address and 
each entry is a list with the 0th element being the user's name (if 
known) and the 1st being the count.

At the end, I print the report, sorted by email address. But then I 
want to print it sorted by frequency of message. What would be the most 
efficient, idiomatic, iterative, functional way to do that. After some 
head-twisting (it's way past my bedtime), I finally figured that 
heapq's would help me, but it seems there should be a cool way to turn 
the dict into a list (map) and also turn it inside out at the same 
time...

keys = addr_dict.keys ()
keys.sort ()
heap = []

for k in keys:
         print "%s (%s)\t%d" % (k, addr_dict[k][0], addr_dict[k][1])
         heapq.heappush (heap, (addr_dict[k][1], k, addr_dict[k][0]))

print '*' * 80
while (heap):
         print "%d\t%s (%s)" % heapq.heappop (heap)

Any suggestions?




From spamfilter at macspeno.com  Thu Jan  8 09:50:38 2004
From: spamfilter at macspeno.com (John P. Speno)
Date: Thu, 8 Jan 2004 14:50:38 +0000 (UTC)
Subject: NNTP Server for this group
References: <eee18d22.0401072316.37ccff69@posting.google.com>
Message-ID: <btjqnu$k1j$2@netnews.upenn.edu>

In <eee18d22.0401072316.37ccff69 at posting.google.com> jonas at jonasgalvez.com (Jonas Galvez) writes:

>Can anyone recommend a good NNTP server for accessing this group?

gmane.comp.python.general on http://www.gmane.org/?

comp.lang.python is also available as a mailing list:
    http://mail.python.org/mailman/listinfo/python-list

Take care.


From elainejackson7355 at home.com  Sun Jan  4 01:50:21 2004
From: elainejackson7355 at home.com (Elaine Jackson)
Date: Sun, 04 Jan 2004 06:50:21 GMT
Subject: Integer math question
References: <3987e01c.0401030832.114c6f2a@posting.google.com>
	<uEOJb.933787$pl3.753391@pd7tw3no>
Message-ID: <NIOJb.936486$6C4.430646@pd7tw1no>

Sorry, I should have said "C rounds toward zero". In other words, the result of
casting x to integer type is sgn(x)*floor(abs(x)).

"Elaine Jackson" <elainejackson7355 at home.com> wrote in message
news:uEOJb.933787$pl3.753391 at pd7tw3no...
| C rounds toward the nearest integer and Python rounds down. The behavior is
| consistent in each case.
|
| "Frank" <mersmann at szut.uni-bremen.de> wrote in message
| news:3987e01c.0401030832.114c6f2a at posting.google.com...
| | Hi,
| |
| | can anybody help with the following problem?
| |
| | In C++
| |
| | i = 5 / 10 and
| | i = -5 / 10 both have the same result 0.
| |
| | In python
| |
| | i = 5 / 10 gives me 0 as expected, but
| | i = -5 / 10 gives -1 as result.
| |
| | Is this a feature or a bug? I remember Delphi gave me the same result as
| | C++.
| |
| | TIA,
| | Frank
|
|




From bmgx_no_sp at mgleesonprop.co.za  Sun Jan  4 12:21:03 2004
From: bmgx_no_sp at mgleesonprop.co.za (bmgx)
Date: Sun, 04 Jan 2004 19:21:03 +0200
Subject: using cgi form via http and extracting results
In-Reply-To: <3ff84844.0@news1.mweb.co.za>
References: <3ff84844.0@news1.mweb.co.za>
Message-ID: <3ff84b7c.0@news1.mweb.co.za>

I found a possible solution:
http://wwwsearch.sourceforge.net/ClientForm

bmgx wrote:

> I would like to use an already existing online service (currency 
> converter) basically consisting of a html form with a few options that 
> is submitted and returns the results. I really don't know where to start 
> but I have assumed the following steps need to be taken:
> 
> 1) Make an http connection to the remote script (http://server/script.cgi)
> 
> 2) Fill out the html form (1x TEXT and 2x SELECT input fields)
> 
> 3) Submit the form
> 
> 4) extract the actual returned result. (using regex or something..)
> 
> Any help on which modules to use would be much appreciated!
> 



From rodrigob at elo.utfsm.cl  Tue Jan 27 07:30:06 2004
From: rodrigob at elo.utfsm.cl (Rodrigo Benenson)
Date: Tue, 27 Jan 2004 09:30:06 -0300
Subject: Pickling Tkinter widgets - Where does Python stand now?
References: <4378fa6f.0401262135.3e05d217@posting.google.com>
Message-ID: <401655f4$1_2@nova.entelchile.net>

are not there Pickle versions that allow you to pickle python code, or
simply pickle classes ?
That could be use to pickle the code that create the widget.
Thus the pickling would pickle the creation code and the unpickling would
reobtain it and instanciate the code class.
That is a strategy but I'm not sure if it is what you need...

rodrigob.

"Marc" <mnations at airmail.net> escribi? en el mensaje
news:4378fa6f.0401262135.3e05d217 at posting.google.com...
> Hi all,
>
> After some research I've decided that my previous question (Confusing
> problem between Tkinter.Intvar...) was headed in the wrong direction.
> Partly because I think I have a greater understanding of what was
> happening, and partly because pickling Tkinter widgets is an issue
> that seems to have been touched on over the years but never really
> acted on.
>
> Postings back to '96 have talked about the need to pickle Tk widgets.
> People have asked about it at various points, and no one has ever
> really even come up with a workaround (that I could find).
>
> So I am wondering a couple of things: Are there any plans in the
> future to alter Tkinter so that it will be Pickle compliant in the
> main release? Has anyone ever found a workaround (whether through
> altering the main Tkinter.py file or other) that will allow pickling
> of Tk widgets.
>
> Thanks,
> Marc




From samirw at connection.com  Tue Jan  6 22:43:45 2004
From: samirw at connection.com (Sambo)
Date: Tue, 06 Jan 2004 19:43:45 -0800
Subject: Finaly found a simple enough task for python, took the plunge,
	but.....
References: <3FFB5312.1030803@connection.com>
	<btfao2$i19$1@news2.tilbu1.nb.home.nl>
Message-ID: <3FFB8071.9070107@connection.com>

It did get rid of the blank window but it also does not appear on the task bar( 
or get focus), but I can ALT+TAB to it.
maybe it is my Vind-Blows 95.

Thanks , Sam.

vincent wehren wrote:

> "Sam" <Sambo at connection.com> schrieb im Newsbeitrag
> news:3FFB5312.1030803 at connection.com...
> | Only 2 weeks messing around with it ( thanks to programs like SYNCHRONEX
> and
> | BITORRENT ), and already trying to create windows ( the paths are just too
> long
> | for me to want to type them ).
> | After much trial and error I finaly got the following code to open the
> 'get dir'
> | dialog , but I am getting another blank window titled 'tk' and "NOT
> RESPONDING"
> | When I kill it (end task), I get reiniit/restart (CTRL+F6) in my shell
> window
> | What am I doing wrong? Do I need to do anythink to clean up after using
> the
> | dialogs?
> 
> Take a look at the tkFileDialog module. Or better, use it for convenience.
> It already provides some "standard" dialogs. You code would then look
> similar to:
> #-----------------------
> import Tkinter
> import tkFileDialog
> 
> def me():
>     root = Tkinter.Tk()
>     root.withdraw() # do this to remove the "blank screen" you mention
>     dirname = tkFileDialog.askdirectory()
>     return dirname
> 
> print me()
> #------------------------
> 
> HTH
> 
> Vincent Wehren
> 
> 
> 




From gerrit at nl.linux.org  Wed Jan 28 08:28:51 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Wed, 28 Jan 2004 14:28:51 +0100
Subject: newsgroup lib
In-Reply-To: <6b17fa95.0401280501.4be454cb@posting.google.com>
References: <6b17fa95.0401280501.4be454cb@posting.google.com>
Message-ID: <20040128132851.GA4338@nl.linux.org>

Jesper Olsen wrote:
> Is there a python module for accessing newsgroup articles?

You're looking for nntplib

http://www.python.org/dev/doc/devel/lib/module-nntplib.html

For example,

>>> s = NNTP('news.cwi.nl')
>>> resp, count, first, last, name = s.group('comp.lang.python')
>>> print 'Group', name, 'has', count, 'articles, range', first, 'to',
>>> last
Group comp.lang.python has 59 articles, range 3742 to 3803
>>> resp, subs = s.xhdr('subject', first + '-' + last)
>>> for id, sub in subs[-10:]: print id, sub
... 
3792 Re: Removing elements from a list while iterating...
3793 Re: Who likes Info files?
3794 Emacs and doc strings
3795 a few questions about the Mac implementation
3796 Re: executable python scripts
3797 Re: executable python scripts
3798 Re: a few questions about the Mac implementation 
3799 Re: PROPOSAL: A Generic Python Object Interface for Python C
Modules
3802 Re: executable python scripts 
3803 Re: \POSIX{} wait and SIGCHLD
>>> s.quit()
'205 news.cwi.nl closing connection.  Goodbye.'

Gerrit.

-- 
5. If a judge try a case, reach a decision, and present his judgment in
writing; if later error shall appear in his decision, and it be through
his own fault, then he shall pay twelve times the fine set by him in the
case, and he shall be publicly removed from the judge's bench, and never
again shall he sit there to render judgement.
          -- 1780 BC, Hammurabi, Code of Law
-- 
PrePEP: Builtin path type
    http://people.nl.linux.org/~gerrit/creaties/path/pep-xxxx.html
Asperger's Syndrome - a personal approach:
	http://people.nl.linux.org/~gerrit/english/



From jjl at pobox.com  Fri Jan  9 09:12:56 2004
From: jjl at pobox.com (John J. Lee)
Date: 09 Jan 2004 14:12:56 +0000
Subject: urllib - changing the user agent
References: <8089854e.0401090509.3dd74859@posting.google.com>
Message-ID: <871xq9ky6v.fsf@pobox.com>

michael at foord.net (Fuzzyman) writes:
[...]
> I'm using urllib (for the first time)..... and google don't seem very
> keen to let me search the group from within a program - the returned
> pages all tell me 'you're not allowed to do that' :-)

Don't do it, then.  Use the google API (mind you, not certain that
google groups is part of that).

[...]
> Could anyone tell me how to subclass this correctly with the version
> attribute set and what text string I should use to mimic Internet
> explorer and/or mozilla ?

IIRC,

opener.addheaders = [("User-agent", "whatever")]

Use a program like ethereal to find what your browser sends for
"whatever".


John


From francisgavila at yahoo.com  Mon Jan 12 15:09:10 2004
From: francisgavila at yahoo.com (Francis Avila)
Date: Mon, 12 Jan 2004 15:09:10 -0500
Subject: Using switches with exec?
References: <mailman.307.1073937631.12720.python-list@python.org>
Message-ID: <1005vp68v80mm44@corp.supernews.com>

Premshree Pillai wrote in message ...
>Hmm...maybe I should have been clearer.
>What I need to do is run an external Python code from
>within another program, and while doing so I need to
>pas a switch (yes, like a command-line switch) to this
>code; i.e., I need to open an external Py program from
>within another Py program...

Use os.system or os.popen, not exec. It doesn't matter at all that the
program you're executing happens to be a Python program.

But if it's already written, and you can modify it, you might as well
package it up nicely to use as a module.  Then you won't be bothering with
switches at all, and you won't have to rely on os services.
--
Francis Avila



From g.winter at dl.ac.uk  Wed Jan  7 05:38:41 2004
From: g.winter at dl.ac.uk (Graeme)
Date: Wed, 07 Jan 2004 10:38:41 +0000
Subject: C++ extension
Message-ID: <btgsvc$g81$1@mserv2.dl.ac.uk>

Hi All,

I guess that this will be a point which has come up in the past, but I can't
find any references to it anywhere. I am writing a Python extension in C++,
and as a part of the extension class I have an STL list of things i.e

class WhatNot
{
public:
        PyObject_HEAD;
.
.
private:
        list<Thing> foo;
};

However, I have found that this works fine when I use the class from C++
code, but doesn't work with PyObject_New (the list is not properly
initialised and I get a segmentation fault.)

Is there an easy way around this problem?

Cheers,

Graeme


From beliavsky at aol.com  Thu Jan 15 14:25:30 2004
From: beliavsky at aol.com (beliavsky at aol.com)
Date: 15 Jan 2004 11:25:30 -0800
Subject: keeping Python code properly indented
Message-ID: <3064b51d.0401151125.711ade4c@posting.google.com>

How do you keep Python code properly indented as you modify it? I use
an Emacs-type editor that has a Python mode, so the initial indenting
is easy. If I later want to put a 'for' loop (or an 'if' statement)
around a bunch of code, I find myself going through the body of the
loop, manually re-indenting to keep the nested loops correct. There
should be a better way.

I think that having a 'for' loop end with a matching 'next' statement,
as done in (for example) Basic, is a safer and clearer way of writing
loops, although some Python programmers consider this a 'feature'
rather than a 'bug'.


From sombDELETE at pobox.ru  Tue Jan 27 19:02:44 2004
From: sombDELETE at pobox.ru (Serge Orlov)
Date: Wed, 28 Jan 2004 03:02:44 +0300
Subject: [ANN] ip2cc-0.3: now it works with Python 2.3
References: <mailman.866.1075218376.12720.python-list@python.org>
	<84e0f331.0401271515.2ed5c4f0@posting.google.com>
Message-ID: <bv6u6v$2ds8$1@nadya.doma>


"Richard" <rshaw2 at midsouth.rr.com> wrote in message news:84e0f331.0401271515.2ed5c4f0 at posting.google.com...
> I get an error when trying to use it... here's the problem below:
>
> C:\Tools>ip2cc.py www.google.com
> Traceback (most recent call last):
>   File "C:\Tools\ip2cc.py", line 338, in ?
>     db = CountryByIP(db_file)
>   File "C:\Tools\ip2cc.py", line 14, in __init__
>     self.fp = open(filename, 'rb')
> IOError: [Errno 2] No such file or directory: 'C:\\Tools\\ip2cc.db'
>
> Looks like the database file is not included with the download.

Try running update.py first to retrieve the database from internet.
The exception should of course be caught by ip2cc script and
a clear explanation should be printed.

-- Serge.




From whitekid at netian.com  Fri Jan 16 04:28:34 2004
From: whitekid at netian.com (whitekid)
Date: Fri, 16 Jan 2004 18:28:34 +0900
Subject: SimpleXMLRPCServer
In-Reply-To: <YKNNb.213874$0P1.42736@twister.nyc.rr.com>
Message-ID: <200401160931.i0G9ViHZ071726@neurogenex.com>

SimpleXMLRPCServer.py is Just Simple!

A few days age. I considered XMLRPC framework for our service.
But finally I choose WebWare. 

Read paper below: http://webware.sourceforge.net/Papers/IntroToWebware.html
> -----Original Message-----
> From: python-list-bounces+whitekid=netian.com at python.org 
> [mailto:python-list-bounces+whitekid=netian.com at python.org] 
> On Behalf Of Maxim Khesin
> Sent: Friday, January 16, 2004 6:01 PM
> To: python-list at python.org
> Subject: SimpleXMLRPCServer
> 
> Hi,
> the typical usage of SimpleXMLRPCServer registers some
> class with the server instance and then jumps into a
> serve-forever loop, e.g.
> 
> server = SimpleXMLRPCServer(('', 8000))
> server.register_instance(MyClass())
> server.serve_forever()
> 
> is there a way to process actions other than XML-RPC
> requests using SimpleXMLRPCServer? Is is possible to do
> something like
> 
> server = SimpleXMLRPCServer(('', 8000))
> server.register_instance(MyClass())
> while(1)
>  if(checkSomeCondidion()):
>   server.serve_once()
>  else: server.stop()
> 
> thanks,
> max
> 
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list
> 
> 




From brandon6684 at yahoo.com  Fri Jan  2 22:20:50 2004
From: brandon6684 at yahoo.com (Brandon)
Date: 2 Jan 2004 19:20:50 -0800
Subject: Python for Embedded Devices?
Message-ID: <efa6f675.0401021920.3bffced0@posting.google.com>

Java seems to have taken off as the platform and language of choice
for many embedded devices. Would it be feasible for Python(perhaps
running on an embedded version of Linux) to act in such a capacity.
Most of my experience with Python has been with Unix-type scripting
tasks and using it when it is an applications built in scripting, but
I know some people try to use to build larger complex applications. Is
the Python interpreter portable and good enough to be used in resource
constrained devices like cell phones?


From irmen at -NOSPAM-REMOVETHIS-xs4all.nl  Sun Jan 11 14:31:19 2004
From: irmen at -NOSPAM-REMOVETHIS-xs4all.nl (Irmen de Jong)
Date: Sun, 11 Jan 2004 20:31:19 +0100
Subject: python-dev Summary for 2003-12-01 through 2003-12-31
In-Reply-To: <mailman.279.1073795910.12720.python-list@python.org>
References: <mailman.279.1073795910.12720.python-list@python.org>
Message-ID: <4001a488$0$317$e4fe514c@news.xs4all.nl>

First: thanks Brett, for the summary. And get well soon from your pneumonia.

Brett wrote:

> ------------------------
> Compiling 2.4 under .NET
> ------------------------
> Martin v. L?wis has started sandbox work on an MSI installer and moving 
> Python 2.4 over to VC 7.

MSI? Why, what is wrong with the old installer?
I'm not too fond of MSI installers, I find them slow and large.
Especially when using lots of files. That may be a problem in the
installer script, but almost all MSI installers I encountered were
extremely slow when installing and deinstalling a program that
consists of a lot of files (and Python does).
(I must note that this is much less so with recent versions
than before, because the help files are no longer in seperate
html files but in a single chm file).

--Irmen


From python at quixs.com  Sun Jan 18 10:13:41 2004
From: python at quixs.com (Lars Heuer)
Date: Sun, 18 Jan 2004 16:13:41 +0100
Subject: wxwindows question
In-Reply-To: <pan.2004.01.18.14.45.16.955657@phreaker.net>
References: <mailman.320.1074000727.12720.python-list@python.org>
	<pan.2004.01.13.23.55.15.95014@phreaker.net>
	<pggid1-jb4.ln1@wintermute.g2ctech>
	<pan.2004.01.17.22.31.58.284937@phreaker.net>
	<1h6pd1-788.ln1@wintermute.g2ctech>
	<pan.2004.01.18.14.45.16.955657@phreaker.net>
Message-ID: <229419755.20040118161341@quixs.com>

Hi Nuff,

I missed the begin of the thread, so I answer you. :)

>> It would be very good if wxPython was more python centric instead of
[...]
> I agree. Having wrappers for existing libraries and software is
> an important thing and having *prototyping* in mind, one should
> not try to make such wrappers as pythonic as possible. (Moreover,
> this would make the maintenance of the wrappers more complicated.)

Maybe WAX is an interesting project. It tries to build a wrapper ahead
of wxPython to serve a more python-ic way to code python programs:

See:
http://wiki.wxpython.org/index.cgi/Wax
http://zephyrfalcon.org/labs/dope_on_wax.html

Best regards,
Lars




From maoy at cis.upenn.edu  Sun Jan 25 18:13:08 2004
From: maoy at cis.upenn.edu (Yun Mao)
Date: Sun, 25 Jan 2004 18:13:08 -0500
Subject: python distribution question
Message-ID: <Pine.LNX.4.44.0401251758170.11507-100000@klondike.cis.upenn.edu>

Hi,

  I wrote a simple python module and try to distribute it by using 
distutil. The setup.py looks straightforward to me, but I'm confused a 
little in distributing the "additional files". It looks like the user can 
change the install dir and prefix by suplying some --install-data 
argument, or --prefix, whatever. My question is that how can my python 
module be aware of where the data are finally installed to? Thanks.


-- Y




From bhan at andrew.cmu.edu  Sat Jan 24 14:58:58 2004
From: bhan at andrew.cmu.edu (Benjamin Han)
Date: Sat, 24 Jan 2004 14:58:58 -0500 (EST)
Subject: Psyco on PowerPC?
In-Reply-To: <26b7aa41.0401232250.3e6588a8@posting.google.com>
References: <30E0BEC9-4DE7-11D8-B663-000393DB5438@andrew.cmu.edu>
	<26b7aa41.0401232250.3e6588a8@posting.google.com>
Message-ID: <Pine.LNX.4.58-035.0401241456360.5509@unix44.andrew.cmu.edu>

Ok here is what I did

1. pulled the latest CVS
2. did a "python setup.py install"
3. ran this testing program:

-- CUT --
#!/usr/bin/env python

import time
import psyco

def f (x):
    p1=p2=ret=0
    for i in xrange(0,x+1):
        if i==1:
            p1=ret=1
        else:
            ret=p2+p1
            p2=p1
            p1=ret

    return ret

startTime=time.time()
print f(100000)
endTime=time.time()
print '* Elapsed time =',endTime-startTime

fastF=psyco.proxy(f)
startTime=time.time()
print fastF(99)
endTime=time.time()
print '* Elapsed time =',endTime-startTime
-- CUT --

The result (on my PowerBook G4):

2597406.... (big number)
* Elapsed time = 2.41602706909
Fatal Python error: psyco: out of memory
Abort trap


I have 1 GB memory. Maybe it's still in the early development stage?

Thanks,

Ben


On Sat, 23 Jan 2004, Roberto Lopez-Gulliver wrote:

> Hi Ben,
>
> Directly from Armin
>
> http://codespeak.net/pipermail/pypy-dev/2003q3/002219.html
>
> Haven't try it myself though.
>
> Please post here any success/failure you may experience in Mac OSX.
>
> Hope this helps.
>
> --roberto
>
> Han Benjamin <bhan at andrew.cmu.edu> wrote in message news:<30E0BEC9-4DE7-11D8-B663-000393DB5438 at andrew.cmu.edu>...
> > Is anyone aware of any effort in bringing Psyco onto other platforms,
> > esp. PowerPC (Mac OS X)? I checked the website but it's still stated as
> > X86 only.
> >
> > Thanks,
> >
> > Ben
>

---
Benjamin Han (http://www.cs.cmu.edu/~benhdj)

Language Technologies Institute, School of Computer Science
Carnegie Mellon University


From cartermark46 at ukmail.com  Tue Jan 20 09:33:09 2004
From: cartermark46 at ukmail.com (Mark Carter)
Date: 20 Jan 2004 06:33:09 -0800
Subject: best book: aint no such thing, and encouragement for old coots
References: <mailman.409.1074191840.12720.python-list@python.org>
	<bu8j31$s4c$1@scotsman.ed.ac.uk>
	<pan.2004.01.16.11.58.58.634101@yahoo.com>
	<m3vfn86vwn.fsf@pc150.maths.bris.ac.uk>
	<d3c9c04.0401190851.5a2f006b@posting.google.com>
	<95aa1afa.0401192355.77568ed4@posting.google.com>
Message-ID: <d3c9c04.0401200633.72675cf7@posting.google.com>

> > I suppose that Schemers and Lispers take the attitude that a lack of
> > syntax is an advantage, because you can ultimately program in any
> > paradigm you wish. It's "just" a case of writing code that implements
> > the paradigm. 
> 
> Uh? The lack of syntax has nothing to do with the lack of paradigm,
> I miss you point, sorry.

What I meant was: programs written in s-exprs makes it possible to
accomodate new paradigms because, ultimately, everything is a list,
which you can parse to accomodate your new paradigm. Programs not
written in s-exprs require extra syntax to be bolted onto the
language.

But I suppose, if you want, to argue that all Turing Complete
languages are equivalent, so they support all the paradigms that the
others support.


From rganesan at myrealbox.com  Sat Jan 24 05:11:33 2004
From: rganesan at myrealbox.com (Ganesan R)
Date: Sat, 24 Jan 2004 15:41:33 +0530
Subject: Perl vs. Python for text manipulation
References: <69A0D4AB81C51447AD6BA387782B8D64093D8A@midl-mail4.etcconnect.com>
	<028FD9F0-4E01-11D8-BB78-0003934ACDEC@zdome.net>
	<mailman.720.1074906442.12720.python-list@python.org>
	<1013o27e3nb141@corp.supernews.com>
Message-ID: <ouhdyloduy.fsf@andlx-anamika.cisco.com>


> Is that all that people mean, though, when they talk about Perl's
> superiority for text mangling?  Is there more to it?  --

It's probably not just regular expressions. In my case, Python's IO
performance is simply not upto the mark. Even Python 2.3 is atleast twice
slower than perl for text manipulation simply because of this IO
overhead. As mentioned in an earlier post, I had to fix a program that
searched for patterns in a gzipped word list to launch zgrep in a pipe and
post process it in python to get acceptable performance.

The perl "built-in" idioms for text processing is not only a syntactic
convenience, there are real performance advantages. For example a simple
perl loop like

while (<>) { }

is nearly 6 times slower in python (8 time slower with Python 2.2) using
fileinput. Every appears to know that fileinput is slower and avoid it when
performance is a concern; but even manually doing the equivalent is slower
in python. I've simply switched back to using perl for my text processing
needs - especially one off or short scripts where I don't care so much about
maintainability as about finishing the job faster.

Ganesan

--
Ganesan R



From NOusenetSPAM at gdargaud.net  Wed Jan 21 04:28:20 2004
From: NOusenetSPAM at gdargaud.net (Guillaume Dargaud)
Date: Wed, 21 Jan 2004 10:28:20 +0100
Subject: Checking for duplicate instances of a script...
Message-ID: <400e4638$0$19274$626a54ce@news.free.fr>

Hello, python beginner here,
How can I make sure that a given script is never run more than once at the
same time in a system ?
Besides checking 'ps' for its own name. Most modern langages have a direct
way to do that.
Thanks
-- 
Guillaume Dargaud
http://www.gdargaud.net/
  "Here is your parachute and here is the manual.
  Welcome to Linux."




From grahamd at dscpl.com.au  Thu Jan 15 05:19:50 2004
From: grahamd at dscpl.com.au (Graham Dumpleton)
Date: 15 Jan 2004 02:19:50 -0800
Subject: I come not to bury C++, but to praise it...
References: <mailman.337.1074032524.12720.python-list@python.org>
	<40055560.7A0DCD0D@engcorp.com>
	<100aoq8efq3nt1e@corp.supernews.com>
Message-ID: <dc6f5c99.0401150219.1ebb349a@posting.google.com>

claird at lairds.com (Cameron Laird) wrote in message news:<100aoq8efq3nt1e at corp.supernews.com>...
> In article <40055560.7A0DCD0D at engcorp.com>,
> Peter Hansen  <peter at engcorp.com> wrote:
> 			.
> 			.
> 			.
> >John, thanks for the reminder about the origins of C++.  (I suspect the majority
> >of readers in this group were not even programming during the CFront era 
> >(roughly 1983-85?), and a history lesson is always good from time to time.)
> 			.
> 			.
> 			.
> I was still fussing with cfront in the early '90s.
> Its era *had* passed by then, though.

Ahh yes, the good old days. Well maybe not.

I once played with version E of cfront once. Ie., before even version
1.0, the E
being for experimental. At least that is from memory what is was
called. That
was back in 1984 and even at that time version 1.2 of cfront was
already out
I think. At the end of that year I got a student vacation job at the
first company
in Australia to be using C++. We had access to beta versions of the
compiler
from AT&T/USL and I think during that time a beta version of 2.0
turned up.
Not sure how long after that it actually got released properly. It was
after that
that Sun and Centerline brought out compilers based on cfront. Note
that these
compilers still didn't implement templates, they only turned up some
number
of years later in version 3.0 in the early 90's some time. In the
interim we were using
a hacked up cpp which could understand enough of the C++ template
syntax
to allow us to make decent use of them. From memory, the first C++
compiler
to actually come out with support for templates wasn't even the
AT&T/USL
version 3.0 of cfront, instead it was a hacked up version of cfront
2.1 made to
support templates and was released by ObjectStore, the OODBMS
developer.
Don't think it supported template functions though, only template
classes.
Anyway later cfront 3.0 became more available. Actually, it was
version 3.0.1.
Version 3.0 mustn't have lived very long because we never actually got
to
see it. There was a subsequent cfront 3.0.2 and I think that was the
last of
them from USL. Sun and Centreline also came out with versions based on
cfront 3.0.1 before Centerline dissappeared altogether and Sun changed
to
the cafe based compiler which they developed. There was GNU C++ as
well,
but it was quite late to the game in providing a version with
templates which
actually worked. Lucid C++ was an interesting compiler but it also
died. At
that time the best compilers were probably those based on the EDG
engine. Oh
must not forget the SGI and HP versions of cfront 3.0.1. Ah, but then
maybe
we should forget the HP version. Anyway, there were a number of other
C++
compiler vendors as well, especially in the cross development arena,
but enough
already.


From martin at v.loewis.de  Wed Jan 28 01:09:19 2004
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 28 Jan 2004 07:09:19 +0100
Subject: Tcl style traces
In-Reply-To: <40171be5$0$1742$5a62ac22@freenews.iinet.net.au>
References: <40171be5$0$1742$5a62ac22@freenews.iinet.net.au>
Message-ID: <bv7jma$u6s$04$1@news.t-online.com>

Derek Fountain wrote:
> Does Python have something similar to Tcl style tracing? That is, the
> ability to call a subroutine when a variable is written to or read from?

No. However, sys.settrace might come close.

Regards,
Martin



From aahz at pythoncraft.com  Tue Jan 20 17:22:02 2004
From: aahz at pythoncraft.com (Aahz)
Date: 20 Jan 2004 17:22:02 -0500
Subject: keynote speaker, PyCon Reminder: Early bird reg deadline 2/1
References: <mailman.541.1074598380.12720.python-list@python.org>
Message-ID: <buk9ma$b0t$1@panix1.panix.com>

In article <mailman.541.1074598380.12720.python-list at python.org>,
John Benson <jsbenson at bensonsystems.com> wrote:
>
>Isn't Kapor the Lotus guy that tried to quash Borlands Quattro Pro because
>it offered an alternative Lotus-user-friendly menuing structure? (see
>http://lpf.ai.mit.edu/Copyright/copyright.html)

According to http://www.kapor.com/homepages/mkapor/bio0701.htm :

   He founded Lotus Development Corp. in 1982 and with Jonathan Sachs,
   who was responsible for technical architecture and implementation,
   created Lotus 1-2-3. He served as the President (later Chairman) and
   Chief Executive Officer of Lotus from 1982 to 1986 and as a Director
   until 1987. 

According to http://www.lgu.com/publications/softcopy/20.shtml

   Lotus began in early 1987 by filing suit in federal court in
   Massachusetts against Paperback Software and Mosaic Software, two
   so-called Lotus "clone" developers. These companies had published
   programs which copied the Lotus 1-2-3 command sequence virtually word
   for word. The cases were assigned to Judge Robert Keeton.

So it's not clear to what extent, if any, Kapor was responsible for
these legal shenanigans.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

A: No.
Q: Is top-posting okay?


From ramen at lackingtalent.com  Sat Jan 17 16:09:19 2004
From: ramen at lackingtalent.com (Dave Benjamin)
Date: Sat, 17 Jan 2004 21:09:19 -0000
Subject: building strings with variable input
References: <pduMb.6321$g4.137247@news2.nokia.com>
Message-ID: <slrnc0j9ki.75d.ramen@lackingtalent.com>

In article <pduMb.6321$g4.137247 at news2.nokia.com>, Olaf Meyer wrote:
> Sometimes if find it clumsy unsing the following approach building strings:
> 
> cmd = "%s -start %s -end %s -dir %s" % (executable, startTime, endTime, 
> directory)
> 
> Especially if you have a lot of variable input it makes it hard to match 
> the variables to the proper fields. From other scripting languanges I'm 
> used to something like:
> 
>   $cmd = "$executable -start $startTime -end $endTime -dir $directory"
> 
> This makes it very easy to see how the string is actually built. You 
> dont't have to worry where which variables go.
> 
> Is there a similar way to do this in python?

Go here:
http://lfw.org/python/

Look under "string interpolation for Python".

Examples supported:

 "Here is a $string." 
 "Here is a $module.member." 
 "Here is an $object.member." 
 "Here is a $functioncall(with, arguments)." 
 "Here is an ${arbitrary + expression}." 
 "Here is an $array[3] member." 
 "Here is a $dictionary['member']."

Thanks to Ka-Ping Yee! I've succesfully used this to build a homebrew
templating language. It's nice and lightweight.

-- 
.:[ dave benjamin (ramenboy) -:- www.ramenfest.com -:- www.3dex.com ]:.
: d r i n k i n g   l i f e   o u t   o f   t h e   c o n t a i n e r :


From jjl at pobox.com  Tue Jan 20 07:30:12 2004
From: jjl at pobox.com (John J. Lee)
Date: 20 Jan 2004 12:30:12 +0000
Subject: Pythonwin working on linux
Message-ID: <871xpuyf8r.fsf@pobox.com>

Well, seems there's a new Python IDE on linux:

http://wwwsearch.sf.net/bits/pythonwin.png

It's running on Debian woody GNU/Linux under KDE 3.2 with Crossover
office (commercial distribution of wine - http://www.winehq.com/),
Python 2.3, win32all 157.  Seems to work fine!

Even some parts of win32com work.  It managed to create a GUID and ran
gen_py on the Word type library, and the MSOffice test launched Word,
but crashed on setting the Visible property.  It feels like cheating,
somehow:

john[1]$ cxoffice/bin/wine .cxoffice/dotwine/fake_windows/Python23/python.exe
Python 2.3 (#46, Jul 29 2003, 18:54:32) [MSC v.1200 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>>

You can even type control-D to exit.

I remember somebody here reporting that making Windows installers
works using McMillan installer, too, and I read somewhere that it's
even possible to install MSVC 6!


John


From nuffsaid at phreaker.net  Tue Jan 13 18:55:15 2004
From: nuffsaid at phreaker.net (Nuff Said)
Date: Wed, 14 Jan 2004 00:55:15 +0100
Subject: wxwindows question
References: <mailman.320.1074000727.12720.python-list@python.org>
Message-ID: <pan.2004.01.13.23.55.15.95014@phreaker.net>

On Tue, 13 Jan 2004 07:31:33 -0600, Jason Tesser wrote:

> I am looking into using wxwindows for a gui to develop applications.
> The 
> Apps need to be cross-platform Mac, Windows, Linux. I work
> For a bible college and will be developing applications ranging from
> online
> Registration to business office software.  My question is what is your
> guys
> Experiences with wxwindows/python?

wxpython is fine (actually: *very fine* :-) for Windows 
applications, but I would not use it for cross-platform 
development, because it is not stable enough on Linux. 

(Even some of the widgets in the wxpython demo crash on Linux;
and if you use wxpython with Unicode support, the situation gets 
even worse. This might change in the near future, but right now,
wxpython is not stable enough on Linux IMHO.)


For things like 'online registrations' etc., I would write a
web based application (using one of the many web application 
frameworks which are available for Python or maybe just good
old CGIs written in Python).


Don't really know what you mean by 'business office software',
but it sounds like you need a powerful text widget and maybe a 
good canvas widget. Check out Tkinter (Python bindings for Tcl/Tk)
for that. (Though Tkinter does not provide widgets like a notebook,
print preview resp. a printing system etc. as wxpython does.)


GTK (i.e. PyGTK for Python) might be worth a look if you plan to
use other programming languages apart from Python, too.


HTH / Nuff



From jjl at pobox.com  Thu Jan  1 13:59:03 2004
From: jjl at pobox.com (John J. Lee)
Date: 01 Jan 2004 18:59:03 +0000
Subject: canonical file access pattern?
References: <pan.2003.12.27.12.57.07.571616@web.de>
	<f6m2vvg6cp7gahs6pauhhgkdm35hi7kml8@4ax.com>
	<pan.2003.12.30.21.32.37.195763@web.de> <874qvhkpm2.fsf@pobox.com>
	<pan.2003.12.31.17.28.48.843512@web.de>
Message-ID: <8765fvpkaw.fsf@pobox.com>

Hans-Joachim Widmaier <hjwidmaier at web.de> writes:
> Am Wed, 31 Dec 2003 14:51:01 +0000 schrieb John J. Lee:
[...]
> > If that were true, why did exceptions get invented?  If you don't need
> > to do something different in all those except: clauses, then don't put
> > them in. 
> 
> One thing I need is to create an informative and useful error message

.strerror?

[...]
> Hmm. The farther away from the actual point of error you catch it, the
> harder it is to tell exactly what happened and to redo/work around it.
[...]

So in some cases, you have fewer except statments, in others, more.
There's really no "canonical pattern" to it.


John


From jdhunter at ace.bsd.uchicago.edu  Tue Jan 27 22:58:33 2004
From: jdhunter at ace.bsd.uchicago.edu (John Hunter)
Date: Tue, 27 Jan 2004 21:58:33 -0600
Subject: Best way to compare a list?
In-Reply-To: <7b454334.0401271739.59267018@posting.google.com>
	(faizan@jaredweb.com's message of "27 Jan 2004 17:39:42 -0800")
References: <7b454334.0401271739.59267018@posting.google.com>
Message-ID: <m265ewwwpi.fsf@mother.paradise.lost>

>>>>> "Fazer" == Fazer  <faizan at jaredweb.com> writes:

    Fazer> Hello, I was wondering which would be the best way to
    Fazer> compare a list?

    Fazer> I was thinking of just using a for loop and testing the
    Fazer> condition.

    Fazer> What do you guys think?  The best/fastest way of comparing
    Fazer> lists.

What do you want to compare for, equality of all elements?  Give a
little more info about what you need to do.  

JDH





From amonroejj at yahoo.com  Wed Jan 14 20:15:08 2004
From: amonroejj at yahoo.com (R. Alan Monroe)
Date: Thu, 15 Jan 2004 01:15:08 GMT
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
	<40047290$1@news.012.net.il>
	<bu29ea$ct54l$1@ID-207230.news.uni-berlin.de>
	<40051cb3$1@news.012.net.il>
	<bu4cm9$dgsp0$1@ID-207230.news.uni-berlin.de>
Message-ID: <wQlNb.2099$f97.683@fe3.columbus.rr.com>

In article <bu4cm9$dgsp0$1 at ID-207230.news.uni-berlin.de>, "Brandon J. Van Every" <try_vanevery_at_mycompanyname at yahoo.com> wrote:
>> >> It
>> >> was an unbelievable waste of time, since you've managed to convice
>> >> (maybe still wrongfully) all the people that you are completely
>> >> clueless.
>> >
>> > Why, because I turned around a project in 3 weeks while having the
>> > flu half the time?
>>
>> No, because you dumped the project because it was boring.
>
>You're a fool then.  What's your school of advice, keep working on things no
>matter how much of a boring waste of time they become?

"Being able to finish something is a form of expertise." --Brandon Van 
Every

http://groups.google.
com/groups?q=finish+project+%22brandon+van+every%22+group:comp.games.
development.
*&hl=en&lr=&ie=UTF-8&oe=UTF-8&selm=3f6ab8de%40shknews01&rnum=9

Alan


From ralobao at click21.com.br  Thu Jan  8 22:11:41 2004
From: ralobao at click21.com.br (Ruivaldo Neto)
Date: Fri, 9 Jan 2004 01:11:41 -0200
Subject: books
In-Reply-To: <5r5svvccvt4lqjnlaurftejbgluu1fepoc@4ax.com>
References: <3FFDC029.AB0A4097@unet.univie.ac.at>
	<5r5svvccvt4lqjnlaurftejbgluu1fepoc@4ax.com>
Message-ID: <200401090111.41400.ralobao@click21.com.br>

You can learn very well it from the web .. its my opinion, but people say that 
Learning python is the best.. and there is too the python bible

Em Sex 09 Jan 2004 00:55, Terry Carroll escreveu:
> On Thu, 08 Jan 2004 20:40:08 GMT, Thomas Mang <a9804814 at unet.univie.ac.at>
>
> wrote:
> >I have programmed mostly in C++ lately, and I want to start learning
> >Python now.
> >
> >Which books would you recommend to buy?
> >
> >I am both looking for an introduction into the language, as well as
> >complete guides.
>
> As an intro, I really liked O'Reilley's "Learning Python."  As a
> reference, I *really* like their "Python In A Nutshell."
>
> I didn't care much at all for their "Programming Python," but lots of
> people swear by it, so your milage may vary.

-- 
RS: Ruivaldo Neto




From swalters_usenet at yahoo.com  Sun Jan 11 05:40:06 2004
From: swalters_usenet at yahoo.com (Samuel Walters)
Date: Sun, 11 Jan 2004 10:40:06 GMT
Subject: OT: Of C, Fortran and pointer aliasing Was: Python if far from a top
	performer...
References: <ryELb.238$tK2.228@amstwist00> <btn5db$2f8$1@absinth.dialog.net.pl>
	<pan.2004.01.09.21.35.40.132608@yahoo.com>
	<6ee58e07.0401092129.302cb9d4@posting.google.com>
	<pan.2004.01.11.06.08.18.867825@yahoo.com>
	<uj6Mb.20937$8H.54797@attbi_s03>
Message-ID: <pan.2004.01.11.10.38.45.810669@yahoo.com>

|Thus Spake Rainer Deyke On the now historical date of Sun, 11 Jan 2004
06:46:50 +0000|

> Samuel Walters wrote:
>> So, I guess that my point is that C might not be the right language for
>> doing numerical processing, but it seems the right language for
>> implementing the primitives of numerical processing.
> 
> The issue with C is that it is too slow for implementing those
> primitives (in part due to pointer aliasing issues).  Fortran is
> considerably faster.

I stand corrected.

Please help me to understand the situation better.

I went digging for technical documents, but thus far haven't found many
useful ones.  It seems everyone but me already understands pointer
aliasing models, so they might discuss them, but they don't explain them.
I am limited in part by my understanding of compilers and also by my
understanding of Fortran.  Here is what I have gathered so far:

Fortran lacks a stack for function calls.  This promotes speed, but
prevents recursive functions. (Most recursive functions can efficiently be
written as loops, though, so this shouldn't be considered a hindrance.)

Fortran passes all arguments by reference. (This is the peppiest way to do
it, especially with static allocation)

Fortran 77 lacks explicit pointers and favors static allocation.  This
allows for the compiler to apply powerful automatic optimization.

Fortran 90 added explicit pointers, but required them to only be pointed
at specific kinds of objects, and only when those particular objects are
declared as targets for pointers.  This allows the compiler to still apply
powerful automatic optimizations to code.  I'm a bit hazy as to whether
Fortran 90 uses static or dynamic allocation, or a combination of both,
and whether it permits recursion.

These pointers not only reference location, but also dimension and stride.
 Stride is implicit in C pointer declarations (by virtue of compile-time
knowledge of the data type pointed to) but dimension is not.

Fortran's extensions for parallel programming have been standardized, and
the language itself makes it easy to decide how to parallelize procedures
at compile time. Thus, it is especially favored for numeric computation on
big iron with lots of parallelism.

Now, for C:

Because of dynamic allocation on the stack and the heap, there is no
compile-time knowledge of where a variable will live, which adds an extra
layer of reference for even static variables.  This also invalidates many
of optimizations used by Fortran compilers.

C lacks many of the fundamental array handling semantics and primitives
that Fortran programs rely on.  Implementing them in C is a real PITA.

C memory allocation is just plain goofy in comparison to Fortran.

To sum up:
Fortran sacrifices generality and dynamism for compile-time knowledge
about data, and deeply optimizes based on that knowledge.

C sacrifices speed for the sake of generality and dynamism.

Please correct me or help me flesh out my ideas.  Please don't skimp on
the low-level details, I've done my fair share of assembly programming, so
what I don't understand, I'll probably be able to find out by googling a
bit.

Some other interesting things I found out:

There are two projects that allow interfacing between Python and Fortran:
F2Py
http://cens.ioc.ee/projects/f2py2e/
PyFortran
http://sourceforge.net/projects/pyfortran

Fortran amply supports interfaces to C and C++

Fortran is compiled. (Doh! and I thought it was interpreted.)

There are lots of debates on whether C++ will ever be as fast as Fortran.
The consensus seems to be "Only if you use the right compiler with the
right switches and are insanely careful about how you program.  IOW Don't
bother, just use Fortran if you want to do numeric processing.

Well, there's another language to add to my list of languages to learn. It
seems to be "The Right Tool" for a great many applications, it interfaces
well with other languages, and it's extremely portable. Chances are, I'll
end up using it somewhere somehow someday.  Now.  To find some Fortran
tutorials.

Thanks in advance for any of your knowledge and wisdom you are willing to
confer upon me.

Sam Walters.

-- 
Never forget the halloween documents.
http://www.opensource.org/halloween/
""" Where will Microsoft try to drag you today?
    Do you really want to go there?"""



From galfip at freestart.hu  Mon Jan 26 05:58:12 2004
From: galfip at freestart.hu (Peter Galfi)
Date: Mon, 26 Jan 2004 11:58:12 +0100
Subject: Overriding compare in SequenceMatcher
Message-ID: <001a01c3e3fb$4d409380$7800a8c0@mailer>

I am trying to make a compare between two lists of numbers using the SequenceMatcher, however I would need somehow to override the method which is used by SequenceMatcher to determine if two elements of the list are equal or not.

In my specific case a number of the list might be equivalent with another number of the list yet their values would be different.

Any idea as to how what and how I can override or any workaround for this problem?

Peter
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From aahz at pythoncraft.com  Sun Jan 18 10:20:38 2004
From: aahz at pythoncraft.com (Aahz)
Date: 18 Jan 2004 10:20:38 -0500
Subject: Forums for Teachers Using Python - Where are they?
References: <pan.2004.01.18.11.30.20.988949@yahoo.com>
Message-ID: <bue886$mc5$1@panix1.panix.com>

In article <pan.2004.01.18.11.30.20.988949 at yahoo.com>,
Samuel Walters  <swalters_usenet at yahoo.com> wrote:
>
>I'm currently considering a position teaching math and possibly
>programming at a small local magnet school.  If I was also teaching
>programming, I would, of course, be using Python.
>
>So, I went out and googled around for resources.  I found lots of articles
>about using Python to teach programming, but I have yet to turn up one
>forum where teachers using Python talk amongst themselves.

edu-sig
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

A: No.
Q: Is top-posting okay?


From skip at pobox.com  Sat Jan 10 13:39:06 2004
From: skip at pobox.com (Skip Montanaro)
Date: Sat, 10 Jan 2004 12:39:06 -0600
Subject: what is best for web development??
In-Reply-To: <f046efac.0401100358.5aa812a0@posting.google.com>
References: <f046efac.0401100358.5aa812a0@posting.google.com>
Message-ID: <16384.18122.805770.494951@montanaro.dyndns.org>


    ketulp> i am developing a web application and i am really confused on
    ketulp> what should i use.  should i use just python and use the cgi
    ketulp> module availabe.  Or should i use application like WebWare.Also
    ketulp> there is PSP available.  I am really confused and need help

As Wilk indicated, there are lots of options and you didn't say
much/anything about your environment or requirements for your web app.  If
all your developers are mostly Python programmers, I think you might like
Quixote.  If you have a diverse group of people with different skills
(programmers, web designers, marketing types), you might find Zope more to
your liking.  There are tons of other options as well.  It all depends...

Skip




From merkosh at hadiko.de  Mon Jan 19 06:22:36 2004
From: merkosh at hadiko.de (Uwe Mayer)
Date: Mon, 19 Jan 2004 12:22:36 +0100
Subject: adding elements to python tuples
Message-ID: <bugels$6u$1@news.rz.uni-karlsruhe.de>

Hi,

is it possible to append new elements to a tuple? I know tuples are
immutable and that this would mean to create a new tuple with one more
element, but how do you do it?

i.e. i have  (1,2,3) and want to append 4:
(1,2,3,4) instead of ((1,2,3),4)

I wanted to use it as a return value of a function and an assignment, but:

(a,b,c),d = myfunc()

doesn't look nice to me. I intended to have 

a,b,c,d = myfunc()

Thanks for any suggestions.
Ciao
Uwe
-- 
        


From tchur at optushome.com.au  Fri Jan  9 16:52:25 2004
From: tchur at optushome.com.au (Tim Churches)
Date: 10 Jan 2004 08:52:25 +1100
Subject: Python is far from a top performer according to benchmark
	test...
In-Reply-To: <btn5db$2f8$1@absinth.dialog.net.pl>
References: <ryELb.238$tK2.228@amstwist00> <btn5db$2f8$1@absinth.dialog.net.pl>
Message-ID: <1073685145.1186.20.camel@emilio>

On Sat, 2004-01-10 at 08:13, Krzysztof Stachlewski wrote:
> "Carl" <phleum_nospam at chello.se> wrote in message
> news:ryELb.238$tK2.228 at amstwist00...
> 
> > I have been experimenting with numerical algorithms in Python with a heavy
> > use of the Numeric module. My experience is that Python is quite fast in
> > comparison with (and sometimes as fast as) traditional languages such as C
> > or C++.
> 
> With "heavy use of Numeric module" you were calling functions
> written in C. So how can you say that Python is fast,
> when C code is doing all the work.

Well, yes, but the Python VM is also written in C, and every time you
make a call to a dictionary, or list etc, it is C code which is doing
all the work. If you like, you could say that Python is a set of
extremely clever wrappers around a bunch of optimised C code - but that
rather diminishes the achievement of Python. I dare say that the
Microsoft .NET and Visual Basic VMs are also written in C/C++, so you
could say the same things about them - but I don't think that is a
useful perspective.
-- 

Tim C

PGP/GnuPG Key 1024D/EAF993D0 available from keyservers everywhere
or at http://members.optushome.com.au/tchur/pubkey.asc
Key fingerprint = 8C22 BF76 33BA B3B5 1D5B  EB37 7891 46A9 EAF9 93D0


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From bh at intevation.de  Tue Jan  6 15:29:32 2004
From: bh at intevation.de (Bernhard Herzog)
Date: Tue, 06 Jan 2004 21:29:32 +0100
Subject: PRE-PEP: new Path class
References: <vvivefh35qjv9a@news.supernews.com>
Message-ID: <6qy8skkehf.fsf@salmakis.intevation.de>

"John Roth" <newsgroups at jhrothjr.com> writes:

> 5) Should == operator be the same as os.path.samefile()?
>
> Why not...

ISTM, that it would essentially make path objects non-hashable.
posixpath.samefile compares the os.stat values for both filenames.
These values can change over time vor various reasons so object equality
changes too.  That it changes is desired, obviously, but what do you use
as hash value?  p1 == p2 has to imply that hash(p1) == hash(p2) but the
only way to achieve that is to give all path objects the same hash
value.  That would make dicts with path objects as keys very
inefficient, though.

As for the path objects in general: Cute idea, but IMO strings for
filenames work fine and there's nothing unpythonic about it.  The
virtual filesytem bit seems like a good reason not to introduce the path
type just yet:

> 2) virtual file system extensibility.
>
> No opinion at this time. I'd like to see a couple
> of attempts at an implementation first before
> settling on a single design.

At this point it doesn't seem clear what virtual filesystems would mean
for Python, so it's unclear, too, what it would mean for a Path class.
Introduce a Path class once there is a need for having several distinct
classes, not earlier.

   Bernhard

-- 
Intevation GmbH                                 http://intevation.de/
Sketch                                 http://sketch.sourceforge.net/
Thuban                                  http://thuban.intevation.org/


From kevin at sb.org  Wed Jan 28 14:44:51 2004
From: kevin at sb.org (Kevin Ballard)
Date: Wed, 28 Jan 2004 14:44:51 -0500
Subject: getting files over ftp
References: <560d84ab.0401281049.18d377f3@posting.google.com>
Message-ID: <bv93hb$2r6c$1@bigboote.WPI.EDU>

On 2004-01-28 13:49:15 -0500, heavens7s at hotmail.com (Joe) said:

> How can you grab files over an ftp connection using ftplib?  I can
> make the connection, browse to the directory, view directory, but
> can't copy over the files.
> 
> Thanks
> 

How about the retrbinary() function?


From CousinStanley at hotmail.com  Fri Jan  9 19:54:31 2004
From: CousinStanley at hotmail.com (Cousin Stanley)
Date: Fri, 9 Jan 2004 17:54:31 -0700
Subject: Problem with OpenGL.GLUT
References: <7447dd2a.0401071402.2c0737e6@posting.google.com>
	<btn17b$97bnn$1@ID-130333.news.uni-berlin.de>
	<3FFF0B8B.4050208@rogers.com>
Message-ID: <BAY7-DAV8T1o13DZJ860002a691@hotmail.com>

| PyOpenGL doesn't include the actual GLUT library, 
| just a wrapper around it 
| .... 
| You can find a link for GLUT for win32 here:
|
|     http://pyopengl.sourceforge.net/documentation/installation.html

Mike .... 

  Thanks for the info .... 

  Sticking a copy of  glut32.dll  from the link you provided above
  in  /site-packages/OpenGL  fixed the  import  problem 
  and the  PyOpenGL  demos now seem to fly as expected,
  with a few exceptions that have some errors 
  that are of a different nature .... 

  I also have a working version of PyOpenGL under Python 2.2
  that has the  glut32.dll  in  /site-packages/OpenGL 
  and assumed that the installer that I used many months ago
  had stuck it there since I couldn't find any other GLUT  related
  files in my archived downloads .... 

  However, I probably somehow deleted it post-install ....

-- 
Cousin Stanley
Human Being
Phoenix, Arizona



From paul at prescod.net  Thu Jan 22 12:40:37 2004
From: paul at prescod.net (Paul Prescod)
Date: Thu, 22 Jan 2004 09:40:37 -0800
Subject: I support PEP 326
In-Reply-To: <BC3563A3.3C38C%grobinson@transpose.com>
References: <BC3563A3.3C38C%grobinson@transpose.com>
Message-ID: <40100B15.7060308@prescod.net>

As a matter of style wouldn't it be nice to refer to PEPs both by number 
and by name? It is just a minor oversight but there is a tendency of 
communities to migrate to refering to things just by numbers in a way 
that excludes newcomers or hobbiests.

NOT directed at you in particular Gary!

  Paul Prescod




From shalabh at cafepy.com  Thu Jan 15 01:31:09 2004
From: shalabh at cafepy.com (Shalabh Chaturvedi)
Date: Wed, 14 Jan 2004 22:31:09 -0800
Subject: Deleting objects
In-Reply-To: <c542f8acd755de732c9da8fc39fbb50a@news.teranews.com>
References: <c542f8acd755de732c9da8fc39fbb50a@news.teranews.com>
Message-ID: <bu5c0f$2g0$1@sea.gmane.org>

user at domain.invalid wrote:
> Say I have an object (foo), that contains an
> array (bar) of references to other objects.
> 
> Now I want to puff some of the objects from the
> array so that I remove the array element, and
> destroy the oject.

You don't need to jump through hoops for this. All you need to do is:

del foo

If there are no other references to the object that was called foo 
above, then (and only then) it will be destroyed.

Python keeps a reference count for each object. When the count hits 0 
(no references pointing to object) it is destroyed.

Because of this, attributes of foo (eg foo.bar) will automatically be 
destroyed when foo is destroyed (assuming they don't have references 
from elsewhere).

> 
> but when I do:
> 
> del foo.bar[0]
> 
> Python says:
>  object doesn't support item deletion
> 
> So do I need to define __del__?  And what would I
> put there?

What is the type of foo.bar?

 >
> What if I wanted to remove the array element
> but still have the object exist?

del foo.bar

This will remove the reference foo.bar.

> What happens if I succeed in destroying an object
> that other objects still think they are referencing?

Try as you might, shooting yourself in the foot is pretty hard in Python 
(see above :)

--
Shalabh





From max at alcyone.com  Tue Jan  6 18:23:07 2004
From: max at alcyone.com (Erik Max Francis)
Date: Tue, 06 Jan 2004 15:23:07 -0800
Subject: OT: Vertical Tab was Re: indendation question
References: <20031226033210.GA24039@mrna.tn.nic.in>
	<mailman.130.1072540438.684.python-list@python.org>
	<3FF9E883.BC8AB864@engcorp.com>
	<pan.2004.01.05.23.05.44.722929@yahoo.com>
	<3FF9F0D0.3AA099CD@alcyone.com> <3FFAB034.E8513A36@engcorp.com>
Message-ID: <3FFB435B.C34747DF@alcyone.com>

Peter Hansen wrote:

> I have or once had an absolutely excellent book on serial
> communications
> programming in C (probably called that, too) which made an excellent
> case
> for replacing all the myriad ways in which we represent end-of-line
> with
> a simple \v, since it is used effectively for no other purpose at this
> point.

I wish I had a copy of the ASCII Standard; it's possible that the
Standard itself has some constraints on the usage of VT that would
disallow this (I don't know for sure, though).

The ISO-8859-1 control characters (not used in ISO/IEC 8859-1 -- gets
confusing, doesn't it?) reserves another 32 codes for control characters
from 0x80 to 0x9f (inclusive); included is NEL Next Line (0x85), which
presumably was intended as a character to resolve the issue once and for
all but which of course never caught on.  The Unicode Standard does talk
about NEL as an acceptable end-of-line indicator in exchange, though.

-- 
 __ Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
/  \ San Jose, CA, USA && 37 20 N 121 53 W && &tSftDotIotE
\__/ I dream things that never were and say, "Why not?"
    -- Robert F. Kennedy (after George Bernard Shaw)


From paul at prescod.net  Tue Jan 20 20:29:02 2004
From: paul at prescod.net (Paul Prescod)
Date: Tue, 20 Jan 2004 17:29:02 -0800
Subject: Pyrex without Python (was Re: calling Pyrex results from C)
In-Reply-To: <20040121005749.GA27424@unpythonic.net>
References: <20040121005749.GA27424@unpythonic.net>
Message-ID: <400DD5DE.90405@prescod.net>

Jeff Epler wrote:

> As I mentioned in another thread a few weeks ago, a current hobby is
> writing code for small embedded processors, where "small" means 1k-4k
> instructions and 128-1k bytes data.  C is a fine language for this as long
> as you don't use FP arithmetic or much of the standard library.

You're definiately pushing the edge. Your domain name is appropriate. ;)

> I wish I could write my code in Pyrex, of course keeping to 'int8_t'
> and 'int16_t' as only basic data types, but it inevitably makes Python
> API calls.
> 
> How close to impossible would it be to make Pyrex emit Python-free code
> if there are only 'cdefs'? 

It will generate a bunch of Python module crap. You could extract the 
pure-C code from the middle of it.

The C code generated by the cdefs is pretty pure.

static int __pyx_f_11pyrexmodule_fast_fib(int __pyx_v_n,int 
__pyx_v_a,int __pyx_
v_b) {
   int __pyx_r;
   int __pyx_1;

   /* "/Users/pprescod/code/fib/pyrexmodule.pyx":5 */
   __pyx_1 = (__pyx_v_n == 0);
   if (__pyx_1) {

     /* "/Users/pprescod/code/fib/pyrexmodule.pyx":6 */
     __pyx_r = __pyx_v_b;
     goto __pyx_L0;
     goto __pyx_L2;
   }
   /*else*/ {

     /* "/Users/pprescod/code/fib/pyrexmodule.pyx":8 */
     __pyx_r = __pyx_f_11pyrexmodule_fast_fib((__pyx_v_n - 
1),__pyx_v_b,(__pyx_v_
a + __pyx_v_b));
     goto __pyx_L0;
   }
   __pyx_L2:;

   __pyx_r = 0;
   goto __pyx_L0;
   __pyx_L1:;
   __Pyx_WriteUnraisable("pyrexmodule.fast_fib");
   __pyx_L0:;
   return __pyx_r;
}

> ... Are there any obvious gotchas in
> Pyrex-generated code if 'int' is a 16-bit datatype?  Is there some
> reason that large stack frames and/or calls to malloc() would be
> unavoidable in Pyrex?

Well...I think it is great to use Pyrex to avoid C (even ignoring Python 
extending). But onje of the main benefits of Pyrex is memory management 
(refcount + GC just like Python). I really don't see much benefit to 
using Pyrex if even _C_'s standard memory management is too extravagent 
for your needs. What exactly would Pyrex buy you if you can't afford to 
use its high-level features like memory management, constructors and OO?

  Paul Prescod





From mhammond at skippinet.com.au  Fri Jan 23 20:37:46 2004
From: mhammond at skippinet.com.au (Mark Hammond)
Date: Sat, 24 Jan 2004 12:37:46 +1100
Subject: weird COM hazard
In-Reply-To: <bur8es$17af$1@news.atman.pl>
References: <bur8es$17af$1@news.atman.pl>
Message-ID: <busi9f$tlj$1@arachne.labyrinth.net.au>

mic wrote:

> and after a short debugging it looks like at some moment I loose the
> reference to the ConnectionStatus class, though obviously I make no such
> operation at all. As it happens 50% of times I run the same script and seems
> to stop not only at the same event, I'm starting to believe that this is
> kind of a bug in win32com. Does anybody experienced anything like that?

What environment is this being run in?  The only way I could see this 
being set to None externally is if Python itself is in the process of 
shutting down.  There is nothing in win32com that will prevent Python 
terminating while COM objects are alive, so there is the potential that 
an external program tries to call back into Python during shutdown.  I 
can't see how this could happen using Python.exe though.

It is certainly nothing that has been reported before.

Mark.



From leo at lspace.org  Mon Jan 19 13:10:41 2004
From: leo at lspace.org (Leo Breebaart)
Date: Mon, 19 Jan 2004 18:10:41 +0000 (UTC)
Subject: Delayed evaluation and setdefault()
Message-ID: <buh6j1$bub$1@news.tudelft.nl>

Hi all,

I have a question about Python and delayed evaluation.

Short-circuiting of Boolean expressions implies that in:

   >>> if a() and b():

any possible side-effects the call to b() might have will not
happen of a() returns true, because then b() will never be
executed.

However, if I go looking for dictionary keys like this:

   >>> d = {}
   >>> d.setdefault('foo', b())

then b() *does* get executed regardless of whether or not the
value it returns is actually used ('foo' was not found) or not
('foo' was found). 

If b() has side-effects, this may not be what you want at all. It
would seem to me not too exotic to expect Python to have some
sort of construct or syntax for dealing with this, just as it
supports Boolean short-circuiting.

So I guess my question is twofold: one, do people think
differently, and if so why?; and two: is there any elegant (or
other) way in which I can achieve the delayed evaluation I desire
for setdefault, given a side-effect-having b()?

-- 
Leo Breebaart  <leo at lspace.org>


From fumanchu at amor.org  Fri Jan  2 12:38:09 2004
From: fumanchu at amor.org (Robert Brewer)
Date: Fri, 2 Jan 2004 09:38:09 -0800
Subject: Conditional except: blocks
Message-ID: <DE1CF2B4FEC4A342BF62B6B2B334601E561BB7@opus.amorhq.net>

I don't have a quesiton or problem, I just figured some of you would
enjoy the somewhat bizarre logic of the snippet I just wrote for a CGI
request dispatcher:

try:
    return nextHandler(args)
except (None, Exception)[self.trapErrors], exc:
    if page == u'-Error':
        raise exc
    else:
        return self.handle_error(exc, scriptWithPath)

If self.trapErrors is True, all exceptions (which subclass Exception)
get trapped, otherwise, no exceptions are trapped. Spiffy. :)


FuManChu



From mwh at python.net  Tue Jan 13 05:52:31 2004
From: mwh at python.net (Michael Hudson)
Date: Tue, 13 Jan 2004 10:52:31 GMT
Subject: Python 2.3.3 compilation problems an HP-UX
References: <aHwLb.6203$g4.135307@news2.nokia.com>
	<btmqaj$1fl$1@panix2.panix.com>
	<U6uMb.6320$g4.137184@news2.nokia.com>
Message-ID: <m38ykcyvbl.fsf@pc150.maths.bris.ac.uk>

Olaf Meyer <nomail at nospam.net> writes:

> Aahz wrote:
> 
> > In article <aHwLb.6203$g4.135307 at news2.nokia.com>,
> > Olaf Meyer  <nomail at nospam.net> wrote:
> >
> >>I'm having some problems compiling Python 2.3.3 on HP-UX (B.11.00).
> >> I've tried sevral different options for the configure script
> >> (e.g. enabling/disabling gcc, aCC) but I always get the same
> >> problem during the final linking stage. Several PyThread_* symbols
> >> are undefined (for details see the output below).
> > I'd suggest that you look at the recent threads about compiling for
> > HP-UX on python-dev.  It's starting to look like a SIG might be a good
> > way to go.
> 
> Thanks for pointing me there. It seems that there's some clean-up
> needed for HP-UX. Luckily compiling 2.2.1 works fine for me, so I
> think I'll stick with it until the 2.3 versions compile with HP-UX
> 'out-of-the-box' ;-)

Hmm.  The 2.3 versions compile out of the box on *some* versions of
HP-UX, because Anthony and I did it, on the Compaq testdrive machines.
But I think they're 11.20 or so.  Bah.

Cheers,
mwh

-- 
  If trees could scream, would we be so cavalier about cutting them
  down? We might, if they screamed all the time, for no good reason.
                                                        -- Jack Handey


From antonmuhin at rambler.ru  Thu Jan  8 10:50:35 2004
From: antonmuhin at rambler.ru (anton muhin)
Date: Thu, 08 Jan 2004 18:50:35 +0300
Subject: Name of the function
In-Reply-To: <9e5ea2c4.0401080640.64ef5d58@posting.google.com>
References: <9e5ea2c4.0401080640.64ef5d58@posting.google.com>
Message-ID: <btjuct$84v33$1@ID-217427.news.uni-berlin.de>

Olaf Meding wrote:
> I am looking for a way to get at the name of the function (while
> executing code inside the function) without (!) knowing the name of
> the function.
> 
> The code below works, but requires the name of the function.  I am
> looking for a way to do the same w/o specifying the name of the
> function.
> 
> def olaf():
>     # requires name of the function
>     print olaf.__name__
> 
>     # this does not work
>     print self.__name__

This seems to work:

def foo():
     print inspect.currentframe().f_code.co_name

regards,
anton.


From usenet at mail-2-me.com  Fri Jan 30 07:47:51 2004
From: usenet at mail-2-me.com (Dirk Hagemann)
Date: 30 Jan 2004 04:47:51 -0800
Subject: How to start a DTS Package on MS-SQL-Server?
Message-ID: <a37aa972.0401300447.f7ca5ae@posting.google.com>

Hi!

Does anybody know how to start a DTS-Package on a MS-SQL-Server out of
a Python-Script?

Thanks for your help!

Dirk


From shalabh at gameboard.org  Sat Jan 10 22:05:17 2004
From: shalabh at gameboard.org (Shalabh Chaturvedi)
Date: Sun, 11 Jan 2004 03:05:17 GMT
Subject: Variable Scope 2 -- Thanks for 1.
References: <dcde6f.0401091247.c17b76e@posting.google.com>
	<3fff16b6$0$315$e4fe514c@news.xs4all.nl>
	<btn6ks$ada$1@fred.mathworks.com>
	<Xns946C7C117B5C4duncanrcpcouk@127.0.0.1>
Message-ID: <N33Mb.4612$sb3.451@nwrddc01.gnilink.net>

Duncan Booth wrote:

> Be careful. The integer object is actually altered, at least in so far as
> its reference count (which is part of the object) is changed:
> 
>>>> import sys
>>>> sys.getrefcount(29)
> 11
>>>> age = 29
>>>> sys.getrefcount(29)
> 12
>>>> 
> 

Off the orig topic, but I think this only happens for small numbers
(optimization - only one object exists for small numbers in Python).

>>> a = 101
>>> sys.getrefcount(101)
2
>>> b = 101
>>> sys.getrefcount(101)
2
>>>

In other words:

>>> a = 29
>>> b = 29
>>> a is b
True
>>> a = 101
>>> b = 101
>>> a is b
False

Of course, 'is' isn't useful when comparing int objects. For other
operations, the semantics are not affected anyway as int objects are
immutable.

--
Shalabh


From carroll at tjc.com  Fri Jan  9 14:44:21 2004
From: carroll at tjc.com (Terry Carroll)
Date: Fri, 09 Jan 2004 19:44:21 GMT
Subject: Unicode and exception strings
References: <svl1xq98gdc.fsf@dresden.uio.no>
Message-ID: <cf0uvv4m34rgcgoi2nfj3hcgugbah82k96@4ax.com>

On 09 Jan 2004 13:18:39 +0100, Rune Froysa <rune.froysa at usit.uio.no>
wrote:

>Assuming an exception like:
>
>  x = ValueError(u'\xf8')
>
>AFAIK the common way to get a string representation of the exception
>as a message is to simply cast it to a string: str(x).  This will
>result in an "UnicodeError: ASCII encoding error: ordinal not in
>range(128)".
>
>The common way to fix this is with something like
>u'\xf8'.encode("ascii", 'replace').  However I can't find any way to
>tell ValueErrors __str__ method which encoding to use.

Rune, I'm not understanding what your problem is.

Is there any reason you're not using, for example, just repr(u'\xf8')?

In one program I have that occasionally runs into a line that includes
some (UTF-8) Unicode-encoded Chinese characters , I have something like
this:

  try:
     _display_text = _display_text + "%s\n" % line
  except UnicodeDecodeError:
     try:
         # decode those UTF8 nasties
         _display_text = _display_text + "%s\n" % line.decode('utf-8'))
     except UnicodeDecodeError:
         # if that still doesn't work, punt
         # (I don't think we'll ever reach this, but just in case)
         _display_text = _display_text + "%s\n" % repr(line)

I don't know if this will help you or not.  



From fumanchu at amor.org  Sat Jan 24 16:58:48 2004
From: fumanchu at amor.org (Robert Brewer)
Date: Sat, 24 Jan 2004 13:58:48 -0800
Subject: xray module
Message-ID: <DE1CF2B4FEC4A342BF62B6B2B334601E561C59@opus.amorhq.net>

I finally cleaned up the code I've been using for a while now to grab
objects out of modules via dotted-package names (all this work to avoid
using exec! Sheesh!). Feel free to use it, abuse it, or comment on it. I
realize many of you already do this on your own--this is just sugar for
the newbies. I'm releasing/announcing it for three reasons:

1. The ego rush of authorship, :D
2. I continually hear people asking for similar (if not exact)
functionality, especially those coming from a Java/Tomcat background,
and
3. The name is cool. I spent a lot of time on it.

Here 'tis:


# xray.py
"""Load modules, classes, functions, and attributes by dotted package
names.

Usage:

    desiredClass = xray.classes("myapp.strtools.alwayslowercase", str)
    newInstance = desiredClass()

or

    for f in startup_function_names:
        func_object = xray.functions(f)
        func_object()


Rationale:

I try to create systems that are configurable by deployers; mostly
becase I
hate it when an application forces me to use the database, filesystem,
communication protocol, algorithm, or operating system du jour.
Abstracting
these basic components of an application is its own study (look up the
Gang
of Four "Strategy" pattern for a start); this is often accomplished with
classes which share signatures, often via subclassing. However, the
deployer
then needs to specify the class they wish to use. This module gives them
the ability to specify that with a single string (for example, in a text
configuration file).

"""

import sys

def modules(modulePath):
    """Load a module and retrieve a reference to that module."""
    try:
        aMod = sys.modules[modulePath]
        if aMod is None:
            raise KeyError
    except KeyError:
        # The last [''] is important.
        aMod = __import__(modulePath, globals(), locals(), [''])
        sys.modules[modulePath] = aMod
    return aMod

def attributes(fullAttributeName):
    """Load a module and retrieve an attribute of that module."""
    
    # Parse out the path, module, and attribute
    lastDot = fullAttributeName.rfind(u".")
    attrName = fullAttributeName[lastDot + 1:]
    modPath = fullAttributeName[:lastDot]
    
    aMod = modules(modPath)
    # Let an AttributeError propagate outward.
    anAttr = getattr(aMod, attrName)
    
    # Return a reference to the attribute.
    return anAttr

def functions(fullFuncName):
    """Load a module and retrieve a function object."""
    
    aFunc = attributes(fullFuncName)
    
    # Assert that the function is a *callable* attribute.
    if not callable(aFunc):
        raise TypeError(u"'%s' is not callable." % fullFuncName)
    
    # Return a reference to the function itself,
    # not the results of the function.
    return aFunc

def classes(fullClassName, parentClass=None):
    """Load a module and retrieve a class (NOT an instance).
    
    If the parentClass is supplied, className must be of parentClass
    or a subclass of parentClass (or None is returned).
    """
    aClass = functions(fullClassName)
    
    # Assert that the class is a subclass of parentClass.
    if parentClass is not None:
        if not issubclass(aClass, parentClass):
            raise TypeError(u"'%s' is not a subclass of %s" %
                            (fullClassName, parentClass.__name__))
    
    # Return a reference to the class itself, not an instantiated
object.
    return aClass

# end xray.py


Robert Brewer
MIS
Amor Ministries
fumanchu at amor.org



From sidharthk at hotmail.com  Mon Jan 26 05:44:36 2004
From: sidharthk at hotmail.com (Sidharthk)
Date: 26 Jan 2004 02:44:36 -0800
Subject: efficient updating of nested dictionaries
References: <H%_Qb.2609$925.1917@nwrddc02.gnilink.net>
	<Lc1Rb.1405$kg4.258@nwrddc01.gnilink.net>
Message-ID: <8d02ff63.0401260244.f0732e6@posting.google.com>

This is untested code but i think it should work.(fingers crossed)
Btw i doubt this will be fast though.

def rec_update(mydict, newdict):
    presentKeysPairs = [(key,value)
                        for (key, value) in newdict.items()
                        if mydict.has_key(key)]
    newKeysPairs = [(key,value)
                    for (key, value) in newdict,items()
                    if not mydict.has_key(key)]
    for key, newValue in presentKeysPairs:
        currentValue = mydict[key]
        if isisntance(newValue, dict):
            mydict[key] = rec_update(newValue)
        else:
            mydict[key] = newValue
    mydict.update(dict(newKeysPairs))
    return mydict

regards

ps. why can't you simply use tuples to represent the different
dimensions, even if the number of dimensions vary.
is there any particular reason why you are using these nested
dictionaries?


From newsgroups at jhrothjr.com  Sat Jan 31 14:37:37 2004
From: newsgroups at jhrothjr.com (John Roth)
Date: Sat, 31 Jan 2004 14:37:37 -0500
Subject: Python vs. Io
References: <711c7390.0401291301.3f95794@posting.google.com>	<D6wSb.6538$qU3.576425@news20.bellglobal.com><711c7390.0401301726.3e38da27@posting.google.com>
	<mailman.1078.1075571238.12720.python-list@python.org>
Message-ID: <101o11rl6d4q6fb@news.supernews.com>


"Paul Prescod" <paul at prescod.net> wrote in message
news:mailman.1078.1075571238.12720.python-list at python.org...
> Daniel Ehrenberg wrote:
> > "Sean Ross" <sross at connectmail.carleton.ca> wrote
> >
> \>
> > I'm not sure how to tell you this so I'll just give a heavily
> > commented example (comments in Io are with #, //, or /* */)
> >
> > parentProto := Object clone //makes parentProto a new object
> > //:= is used for creating new variables
> > parentProto shared := 5 //parentProto's new slot shared holds 5
>
> Do you know why the creator of IO decided not to use the now-ubiquitous
> "." operator? I don't know whether I can define a "." operator that has
> the appropriate behaviour but that wouldn't help anyhow.

As far as I know, since everything is a "message send", the dot
is unnecessary. Every operation is either object.paremeter(s),
or syntactic sugar that gets transformed into that format.

John Roth
>
>   Paul Prescod
>
>




From nav+posts at bandersnatch.org  Sat Jan 17 21:38:43 2004
From: nav+posts at bandersnatch.org (Nick Vargish)
Date: 17 Jan 2004 21:38:43 -0500
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
	<m3hdyvswui.fsf@tanelorn.bandersnatch.org>
	<1074370049.790131@radsrv1.tranzpeer.net>
Message-ID: <m34quurnf0.fsf@tanelorn.bandersnatch.org>

Corey Murtagh <emonk at slingshot.no.uce> writes:

> Actually I kind of agree here.  I've had plenty of problems with
> Cygwin - although less with MinGW. 

It's always performed flawlessly for me. Have you reported the
problems to the Cygwin folks, or tried to fix the issues yourself?

> An OSS project that requires a Linux emulation shim to run on any
> other platform is not, IMHO, cross-platform at all.

Linux != Gnu, though to some that might seem like splitting hairs.

What other free development environments are there for Win32 that
offers power and flexibility comparable to the Cygwin tools? Visual
Studio is not free (quite the opposite!), and for many OSS developers,
that makes it impractical.

Sorry, I realize this is getting pretty off topic, especially for the
Python group, which is where I'm reading it.

Nick

-- 
#  sigmask  ||  0.2  ||  20030107  ||  public domain  ||  feed this to a python
print reduce(lambda x,y:x+chr(ord(y)-1),' Ojdl!Wbshjti!=obwAcboefstobudi/psh?')


From fuf at mageo.cz  Wed Jan 28 09:13:08 2004
From: fuf at mageo.cz (Michal Vitecek)
Date: Wed, 28 Jan 2004 15:13:08 +0100
Subject: fast deep-copying of instances
Message-ID: <20040128141308.GA11278@foof.i3.cz>

 hello,

 i have a data cache which sits between a slow database and my server and
 it's used to cache data retrieved from the database. in order for it to
 work correctly (race-conditions) i need a fast deep-copying of
 instances (the cache is used heavily).

 i tried to use copy module but it's *very* slow, then i tried cPickle
 to pickle and depickle instances which was faster, but still slow.
 
 then i've come across cCopy which is 8x faster than copy, but
 unfortunately it doesn't work with new style classes because type()'s
 return is crappy for them. so the question is: does there exist a fast
 copy module which works with new style classes?

    thank you,
-- 
		fuf		(fuf at mageo.cz)



From cookedm+news at physics.mcmaster.ca  Thu Jan 29 17:25:54 2004
From: cookedm+news at physics.mcmaster.ca (David M. Cooke)
Date: Thu, 29 Jan 2004 17:25:54 -0500
Subject: Color count in PIL
References: <2ec1bc1c.0401271443.15f56742@posting.google.com>
	<2ec1bc1c.0401291326.5602aee2@posting.google.com>
Message-ID: <qnkbromie8d.fsf@arbutus.physics.mcmaster.ca>

At some point, wrbt at email.com (Larry) wrote:

> wrbt at email.com (Larry) wrote in message news:<2ec1bc1c.0401271443.15f56742 at posting.google.com>...
>> I've been walking up, down, and around instances in the object model
>> of PIL trying to figure out how to easily calculate how many unique
>> colors are used in an image, specifically a bitmap (mode "P"). Am I
>> missing something?
>> 
>> Thanks python friends!
>
> So far I have: colors=len(sets.Set(list(im.getdata())))
>
> That makes me want to throw up.

Probably very inefficient. Have a look at im.histogram(). Something
like:

colours = sum( [ 1 for h in im.histogram() if h != 0 ] )

-- 
|>|\/|<
/--------------------------------------------------------------------------\
|David M. Cooke
|cookedm(at)physics(dot)mcmaster(dot)ca


From dave at pythonapocrypha.com  Fri Jan 23 12:21:56 2004
From: dave at pythonapocrypha.com (Dave Brueck)
Date: Fri, 23 Jan 2004 10:21:56 -0700
Subject: Batch commands on Windows
References: <7A3Qb.4870$AK2.3953@newssvr29.news.prodigy.com><mailman.689.1074867434.12720.python-list@python.org>
	<xqxptdb6lxy.fsf@cola2.ca.boeing.com>
Message-ID: <025101c3e1d5$670a7c90$6401fea9@YODA>

Harry wrote:
> "Dave Brueck" <dave at pythonapocrypha.com> writes:
>
> > Moosebumps wrote:
> > > So, after reading some messages about os.system, and looking at the popen
> > > stuff and trying it a bit, I still have not found a way to keep a command
> > > window open for several commands (on Windows 2000/XP), while seeing the
> > > normal output in a command window.  All I want to do is do what a batch
file
> > > does, but I want to actually have functions and associative arrays and
all
> > > the other niceties of python.
> >
> > Can you give an example of what you mean, in Perl as well as what you hoped
> > would work in Python? I couldn't quite understand what it is that you're
trying
> > to do.
> >
> > > What's the deal with that?  I thought Python started out as a scripting
> > > language.  And that seems like the most basic thing that a scripting
> > > language should do.
> >
> > Dunno, although MS-DOS shell scripting is certainly a small subset of
scripting
> > in general. Maybe with a concrete example somebody will be able to give you
a
> > hand.
> >
> > -Dave
> >
> >
>
> I wonder if this is miscommunication over "script" vs "shell window".
> This confused me when trying python scripts in MS Windows after using
> then in *NIX.

Yeah, I wondered that too, although I thought the OP said this problem didn't
occur with Perl. Maybe I misunderstood the message though.

-Dave




From wmich50 at theramp.net  Fri Jan  9 11:44:03 2004
From: wmich50 at theramp.net (Walt)
Date: Fri, 09 Jan 2004 07:44:03 -0900
Subject: xml-rpc
Message-ID: <vvub6otnlfdi56@corp.supernews.com>

Newbie using xmlrpclib
Curious about why the same very simple xml-rpc demo code should execute
quickly under python2.1 but very slowly under python2.3

python2.1  ~4 seconds
python2.3  ~24 seconds on the same machine

Is there a well known reason for the difference?

Here's the code:
-----------------------------------------------------------------------------
from xmlrpclib import *
import sys
server = Server("http://wmich.freeshell.org/betty.php")
try:
    print "Got '" + server.examples.getStateName(32) + "'"
    print "----------------------------------------------------"
    r = server.examples.echo('Three "blind" mice - ' + "See 'how' they run")
    print r
    print "--------------------------------------------"
    # name/age example. this exercises structs and arrays
    a = [ {'name': 'Dave', 'age': 35}, {'name': 'Edd', 'age': 45 },
          {'name': 'Fred', 'age': 23}, {'name': 'Barney', 'age': 36 }]
    r = server.examples.sortByAge(a)
    print r
    print "---------------------------------------------"
except Error, v:
    print "XML-RPC Error:",v
------------------------------------------------------------------------------


Thanks,
Walt


From http  Mon Jan 12 16:46:38 2004
From: http (Paul Rubin)
Date: 12 Jan 2004 13:46:38 -0800
Subject: C++ bad-mouthing (was: Why learn Python ??)
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<7xisjh1e3i.fsf@ruckus.brouhaha.com>
	<10064loqc7sd7e3@corp.supernews.com>
Message-ID: <7xeku496wx.fsf@ruckus.brouhaha.com>

claird at lairds.com (Cameron Laird) writes:
> >I'd say don't bother with C++ unless you're working on a big
> >multi-person project.  Its design will make no sense to you unless
> >you've faced the problems that come up in those projects.  Otherwise
> >it's a big mess.
>
> And if you *are* working on a big multi-person project, and you
> choose C++, you're likely to end up with ... a big mess.

C++ was motivated by the problems faced by big projects written in C.
I'm talking about stuff like telephone switches with hundreds of
programmers and millions of lines of code.  Even with very competent
designers and managers, those projects usually ran amuck.  C++ gives
some real help in keeping projects like that functioning, if the
programmers and managers know what they're doing.  If they don't know
what they're doing (as is the case in most projects), C++ isn't that
likely to help and may make the problems worse.

But if you've lived through the multitudinous nightmares of projects
like that, and you then read Stroustrup's book about C++, on just
about every page you'll see some feature described and you'll
recognize the specific nightmare that inspired it.  If you haven't
experienced those nightmares yourself, I can't be sure but I think the
feature descriptions will just seem like feature descriptions and
you won't understand the real reasons why they're there.

I think the OP's list should also have included Java, which is sort of
a modernized, "discount" version of C++.


From me at privacy.net  Tue Jan 27 19:33:00 2004
From: me at privacy.net (Heather Coppersmith)
Date: 27 Jan 2004 19:33:00 -0500
Subject: I support PEP 326
References: <mailman.654.1074788734.12720.python-list@python.org>
	<698f09f8.0401271318.21c9ca72@posting.google.com>
Message-ID: <m2hdyglxoj.fsf@host-201.null.null.bellsouth.net>

On 27 Jan 2004 13:18:43 -0800,
tweedgeezer at hotmail.com (Jeremy Fincher) wrote:

> ... If I have my Min/Max objects and you have your Min/Max
> objects, someone's objects simply aren't going to work as
> expected.

Sure they will:  Mine is mymodule.Min; yours is yourmodule.Min.
Use "from import" at your own risk and peril.

Regards,
Heather

-- 
Heather Coppersmith
That's not right; that's not even wrong. -- Wolfgang Pauli


From fisher at energy.uch.net  Mon Jan 26 05:36:48 2004
From: fisher at energy.uch.net (Serge A. Ribalchenko)
Date: Mon, 26 Jan 2004 12:36:48 +0200
Subject: need something like threads, or just multiple simulateous exec's
Message-ID: <sdq2vb.h8h.ln@energy.uch.net>

Hi all,

I'm new in python coding...
Can someone point me how can I do such a usual thing? I need to ping
some hosts, and harvest results in one list. Just cause there is about 
120 hosts in the LAN, and approx. 10% is down at working hours, pinging
each host at a time from cycle is VERY slow solution.
I did:
retv = os.popen('ping -c 1 ' + ip + ' |grep \"1 packet\" |awk  \'{print 
$4}\'')
res = retv.read() 

In cycle. BUT. I need something FASTER. And I feel fear to scary word 
'thread'. May someone give me some examle using threads for this 
purpose? Thanks.


Best wishes,
~       Serge.



From ville.spamstermeister.vainio at thisisspamprotectiontut.finland  Sat Jan 24 04:41:46 2004
From: ville.spamstermeister.vainio at thisisspamprotectiontut.finland (Ville Vainio)
Date: 24 Jan 2004 11:41:46 +0200
Subject: Perl vs. Python for text manipulation (was: [OPINION] - does
	language really matter if they all do the	samething?)
References: <69A0D4AB81C51447AD6BA387782B8D64093D8A@midl-mail4.etcconnect.com>
	<028FD9F0-4E01-11D8-BB78-0003934ACDEC@zdome.net>
	<mailman.720.1074906442.12720.python-list@python.org>
	<1013o27e3nb141@corp.supernews.com>
Message-ID: <du7brotr8dh.fsf@amadeus.cc.tut.fi>

>>>>> "Cameron" == Cameron Laird <claird at lairds.com> writes:


    Cameron> conclusively demonstrates, at least for me; but I don't
    Cameron> even see Perl as distinctly superior to Python in text
    Cameron> mangling.  I recognize that Python REs can feel a bit

Me neither. People seem to think that if a language is specialized to
some task, it must be superior to a language that isn't specialized to
the task for performing that very task. I don't see any truth in that
logic.

    Cameron> cumbersome, in comparison to Perl, because they essenti-
    Cameron> ally demand the extra step of explicit compilation.  Is

And even that isn't needed: re.search("hello.*ld","hello world"). 

    Cameron> that all that people mean, though, when they talk about
    Cameron> Perl's superiority for text mangling?  Is there more to
    Cameron> it?  --

I think there is the argument of perl being faster in some such
tasks. That shouldn't really matter for most text processing tasks
that are batch runs anyway.

Someone should just write a "dirtypython"-module, and importing * from
the module would get all the shortcuts that make Python seem more
verbose than perl:

rs = re.search
s = re.sub

And perhaps add a lot of magic to the functions that cripple the
general purpose usability, but make "common tasks" more
concise. Voila', Perl.

-- 
Ville Vainio   http://tinyurl.com/2prnb


From peter at engcorp.com  Thu Jan  8 10:23:39 2004
From: peter at engcorp.com (Peter Hansen)
Date: Thu, 08 Jan 2004 10:23:39 -0500
Subject: Naming convention for non-inplace methods (was Re: PRE-PEP: new
 Path class)
References: <1073567709.3ffd57dda8cb0@mcherm.com>
	<mailman.187.1073568366.12720.python-list@python.org>
	<3FFD72BD.780554D8@engcorp.com> <ulloio481.fsf@online.no>
Message-ID: <3FFD75FB.4F61FDF1@engcorp.com>

Syver Enstad wrote:
> 
> Peter Hansen <peter at engcorp.com> writes:
> 
> > I haven't been following (either discussion) closely, but this
> > sounds similar to some posts I read about a discussing involved a
> > .reverse() method, and the apparent conclusion that .reversed()
> > [note the 'd'] was more appropriate as it didn't imply that the
> > object was being modified in-place, but that it was returning a
> > reversed version of itself.  Same thing could apply here...
> 
> Good point, but what about asNormalized() or asReversed()? Or
> as_reversed() or as_normalized() if that is the coding
> convention. Doesn't that communicate the intent even better?

I wouldn't object strenuously to any one of the three approaches,
although the simple .normalized() and .reversed() version feels 
slightly more Pythonic to me, merely because the other two don't
seem to be existing conventions in, say, the standard libraries.

I'd go with whatever precedent has already been set, if one has 
been set, and otherwise open a new discussion as the topic has a
lot of merit...

-Peter


From jjl at pobox.com  Fri Jan 23 07:45:50 2004
From: jjl at pobox.com (John J. Lee)
Date: 23 Jan 2004 12:45:50 +0000
Subject: Urllib2 upgrade is breaking urlopen()
References: <1d17eeb7.0401221818.7d98672@posting.google.com>
Message-ID: <87znce4yv5.fsf@pobox.com>

dj00302003 at yahoo.com (Jay Davis) writes:

> We have a lot of simple code using 'urllib', that basically
> just goes out and opens and read()'s some http url.  Very basic,
> ten line scripts, and they work fine with urllib.
> 
> We want to use urllib2 for everything, though, but when we
> do we get: 
[...]
> urllib2.HTTPError: HTTP Error 302: The HTTP server returned a redirect
> error that would lead to an infinite loop.
> The last 30x error message was:
> Found

Which version of Python are you using?

It might also help if you can give a publicly-accessible URL that
triggers the problem (mail it to me privately if you prefer).


John


From ville.spamstermeister.vainio at thisisspamprotectiontut.finland  Wed Jan 21 02:38:35 2004
From: ville.spamstermeister.vainio at thisisspamprotectiontut.finland (Ville Vainio)
Date: 21 Jan 2004 09:38:35 +0200
Subject: an example of a singleton design pattern in python?
References: <hc63caapdui.fsf@praxis.lsil.com>
	<du7smiacnwx.fsf@mozart.cc.tut.fi> <400DAF6F.6EF66415@engcorp.com>
Message-ID: <du73ca969ac.fsf@mozart.cc.tut.fi>


    >>  This trivial snippet might be enough for your needs:
    >> 
    >> class Foo(): pass
    >> 
    >> _inst = None
    >> 
    >> def fooinstance(): if not _inst: _inst = Foo() return _inst

    peter> Looks like at least two errors, one being the parentheses
    peter> on the class name, and the other being a failure to flag
    peter> _inst as being global...

True. I guess the idea got through anyway. It was late :-P.

-- 
Ville Vainio   http://tinyurl.com/2prnb


From stephendotboulet at motorola_._com  Mon Jan 26 15:49:25 2004
From: stephendotboulet at motorola_._com (Stephen Boulet)
Date: Mon, 26 Jan 2004 14:49:25 -0600
Subject: Zope
In-Reply-To: <bv3ggt$nm3gh$1@ID-216549.news.uni-berlin.de>
References: <bv2j13$n4oug$1@ID-216549.news.uni-berlin.de>
	<bv3f40$48q$1@newshost.mot.com>
	<bv3ggt$nm3gh$1@ID-216549.news.uni-berlin.de>
Message-ID: <bv3ujt$r2d$2@newshost.mot.com>

lenk wrote:

> Stephen Boulet wrote:
> 
>  > Just wondering, it's not in /etc/init.d/zope* ?
>  >
> 
> there is no zope path in etc/init.d/..
> only /opt/zope/...........


Does "rpm -ql zope | grep bin" return anything useful?

(Hoping I'm remembering my rpm arguments ...)

Stephen


From max at alcyone.com  Mon Jan 19 14:55:00 2004
From: max at alcyone.com (Erik Max Francis)
Date: Mon, 19 Jan 2004 11:55:00 -0800
Subject: HowTo distinguish between File and Directory
References: <Xns94758BB1DDFADsdfexpertunecom@216.168.3.44>
Message-ID: <400C3614.2DAA2197@alcyone.com>

Scott F wrote:

> On Win32, is there a function in the standard modules that can take a
> pathname and return whether it refers to a File or a Directory?

There's certainly one in the os module:  os.path.isdir and
os.path.isfile.

-- 
 __ Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
/  \ San Jose, CA, USA && 37 20 N 121 53 W && &tSftDotIotE
\__/ The critical period in matrimony is breakfast-time.
    -- A.P. Herbert


From newsgroups at jhrothjr.com  Sat Jan  3 07:46:21 2004
From: newsgroups at jhrothjr.com (John Roth)
Date: Sat, 3 Jan 2004 07:46:21 -0500
Subject: finding file size
References: <4V4Jb.12709$Vl6.2811218@news20.bellglobal.com>
	<bt3l9i$pog$07$3@news.t-online.com>
Message-ID: <vvdefjd4539s85@news.supernews.com>


"Martin v. Loewis" <martin at v.loewis.de> wrote in message
news:bt3l9i$pog$07$3 at news.t-online.com...
> Sean Ross wrote:
>
> > My question is this: Is there a reason why file objects could not have a
> > size method or property?
>
> Yes. In Python, file objects belong to the larger category of "file-like
> objects", and not all file-like objects have the inherent notion of a
> size. E.g. what would you think sys.stdin.size should return (which
> actually is a proper file object - not just file-like)?
>
> Other examples include the things returned from os.popen or socket.socket.

I think the issue here is that the abstract concept behind a "file-like
object"
is that of something external that can be opened, read, written to and
closed.
As you say, this does not include the notion of basic implementation: a file
on a file system is a different animal than a network socket, which is
different
from a pipe, etc.

I think we need an object that encapsulates the notion of a file (or
directory)
as a file system object. That object shouldn't support "file-like"
activities:
it should have a method that returns a standard file object to do that.

I like Geritt Holl's filename suggestion as well, but it's not the same
as this suggestion.

John Roth
>
> Regards,
> Martin
>




From mcfletch at rogers.com  Wed Jan 21 16:21:32 2004
From: mcfletch at rogers.com (Mike C. Fletcher)
Date: Wed, 21 Jan 2004 16:21:32 -0500
Subject: Need help with Python class idioms
In-Reply-To: <f5c5dc88.0401211243.7e81a26b@posting.google.com>
References: <f5c5dc88.0401211243.7e81a26b@posting.google.com>
Message-ID: <400EED5C.6040609@rogers.com>

Tad Marko wrote:

>Howdy!
>
>I'm trying to get my head around Python and I've come to realize that
>there are a lot of idioms in Python that are a bit different than in
>other languages. I have a class similar to what I've included below.
>The only difference is that in the real class, I have even more
>mandatory attributes. Too many to specify at once on a constructor and
>they don't always exist at construction time anyway, so the accessor
>idiom must remain.
>
>Can anyone suggest a more Pythony way to do the following?
>  
>
Note: shameless plug follows...

With basicproperty, it would look something like this:

class A( propertied.Propertied ):   
    mandatoryVar1 = common.IntegerProperty(
       "mandatoryVar1", """Property that's mandatory 'cause we're cool""",
    )
    defaultVar1 = common.IntegerProperty(
       "defaultVar1", """Property that's got a default value""",
       defaultValue = 32,
    )
    defaultVar2 = common.StringProperty(
       "defaultVar2", """Property that's got a default function instead""",
       defaultFunction = lambda prop, client: client.__class__.__name__,
    )

a = A( mandatoryVar1 = 3 )
a.defaultVar2
a.defaultVar1

however, you continue on to show you're using a database, so you'd 
probably prefer something like pytable (which is built on top of 
basicproperty, but uses database schemas to control the creation and 
operation of the properties):

from pytable.schemabuilder import *
schema = table(
    "my_table",
    comment = """Table for storing whatevers""",
    fields = (
        field(
            'mandatoryVar1', 'integer',0, # name, sql data-type, size
            constraints = (
                notNull(),
            ),
        ),
        field(
            'defaultVal1', 'integer',0, # name, sql data-type, size
            defaultValue = 32, # sql default value
            constraints = (
                notNull(),
            ),
        ),
        field(
            'Var2', 'timestamptz',0, # name, sql data-type, size
            defaultValue = '"timestamp"(\'now\'::text)', # sql default value
            constraints = (
                notNull(),
            ),
        ),
    ),
    indices = (
        index( primary=1, fields=('mandatoryVar1', 'defaultVal1')),
    ),
)

print schema.itemClass
help( schema.itemClass )

row = schema.itemClass( mandatoryVar1 = 33 )
row.insertQuery( my_db_connection ) # get one from pytable
row.mandatoryVar1 = 34
row.updateQuery( my_db_connection )
row.deleteQuery( my_db_connection )

BasicProperty:
    http://basicproperty.sourceforge.net/
PyTable RDBMS Wrapper:
    http://pytable.sourceforge.net/

In a more general sense, for DB operations, use a database wrapper 
module, there's lots of them around.  And even more generally, 
properties are *very* good at describing (common) property-based systems 
of objects such as you're apparently working with.  Properties are new 
with Python 2.2, so underused sometimes, but they are very good at 
certain types of domain modelling.

Enjoy yourself,
Mike

_______________________________________
  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://members.rogers.com/mcfletch/






From alessandro at sephiroth.it  Sat Jan 10 09:25:44 2004
From: alessandro at sephiroth.it (Alessandro Crugnola *sephiroth*)
Date: Sat, 10 Jan 2004 14:25:44 GMT
Subject: readling newlines
Message-ID: <IXTLb.87546$_P.3280883@news4.tin.it>

Hi, I'm trying to detect the newlines method of a file opened.
I'm using the 'U' mode as parameter when opening a file, but for every file opened the result is always "\r\n", even if the file has
been saved with the "\n" newline method.
Is there i'm missing?

I'm on Windows with python 2.3.3




From wichert at wiggy.net  Thu Jan 22 05:35:49 2004
From: wichert at wiggy.net (Wichert Akkerman)
Date: Thu, 22 Jan 2004 11:35:49 +0100
Subject: utf8 encoding problem
Message-ID: <20040122103549.GA5620@wiggy.net>

I'm struggling with what should be a trivial problem but I can't seem to 
come up with a proper solution: I am working on a CGI that takes utf-8
input from a browser. The input is nicely encoded so you get something
like this:

  firstname=t%C3%A9s

where %C3CA9 is a single character in utf-8 encoding. Passing this
through urllib.unquote does not help:

  >>> urllib.unquote(u't%C3%A9st')
  u't%C3%A9st'

The problem turned out to be that urllib.unquote() process processes
its input character by character which breaks when it tries to call
chr() for a character: it gets a character which is not valid ascii
(outside the legal range) or valid unicode (it's only half a utf-8
character) and as a result it fails:

   >>> chr(195) + u""
   Traceback (most recent call last):
     File "<stdin>", line 1, in ?
   UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 0: ordinal not in range(128)


I can't seem to find a working method to do this conversion correctly.
Can someone point me in the right direction? (and please cc me on
replies since I'm not currently subscribed to this list/newsgroup).

Wichert.

-- 
Wichert Akkerman <wichert at wiggy.net>    It is simple to make things.
http://www.wiggy.net/                   It is hard to make things simple.




From mjackson at alumni.caltech.edu  Wed Jan 21 22:35:45 2004
From: mjackson at alumni.caltech.edu (Mark Jackson)
Date: 22 Jan 2004 03:35:45 GMT
Subject: Secure Voting software
References: <20040121174434.28446.00000428@mb-m15.aol.com>
	<7xvfn4lq9m.fsf@ruckus.brouhaha.com>
Message-ID: <bungeh$oor$1@news.wrc.xerox.com>

Paul Rubin <http://phr.cx at NOSPAM.invalid> writes:
> piedmontbiz at aol.com (PiedmontBiz) writes:
> > What things must I keep in mind when I design a python application to be
> > secure?
> > 
> > Since python is developed using C, can python be free from the
> > buffer overrun problems which plague other C programs?
> 
> Buffer overruns are just one narrow type of security failure.
> Security is really a hard subject and even systems built by experts
> often have security holes.  There are various books written on how to
> write secure software, and also some HOWTO's.  For systems like voting
> machines, there are a lot of non-software issues you have to deal with too.  
> 
> The book "Security Engineering" by Ross Anderson is a good place to start
> reading if you're interested in the subject.

Many of the issues have been discussed on comp.risks over the years,
and the archives of same contain some useful pointers to in-depth
analyses.  A searchable archive is found at http://www.risks.org.

-- 
Mark Jackson - http://www.alumni.caltech.edu/~mjackson
	No *good* model ever accounted for *all* the facts, since
	some data was bound to be misleading if not plain wrong.
					- James D. Watson




From exarkun at intarweb.us  Mon Jan  5 08:13:46 2004
From: exarkun at intarweb.us (Jp Calderone)
Date: Mon, 5 Jan 2004 08:13:46 -0500
Subject: Why exception is not newstyle class?
In-Reply-To: <2f9c31f.0401042349.3eea0e9b@posting.google.com>
References: <2f9c31f.0401042349.3eea0e9b@posting.google.com>
Message-ID: <20040105131346.GB4988@intarweb.us>

On Sun, Jan 04, 2004 at 11:49:35PM -0800, kyo wrote:
> 
> I want to use new style class, how to do that?
> If I can't, Why?

  Because Exceptions existed before new-style classes did, and the mechanism
has not yet caught up.

  Jp



From ajw140NO at SPAM.york.ac.uk  Sat Jan 17 11:30:38 2004
From: ajw140NO at SPAM.york.ac.uk (Andrew Wilkinson)
Date: Sat, 17 Jan 2004 16:30:38 +0000
Subject: Overriding operator delete in a Python extension
Message-ID: <bubnvd$7v1$1@pump1.york.ac.uk>

Hi,

This is probably more of a gcc question than a python one, but hopefully
someone out their will know that answer.

I've written a C++ Python extension, and as part of it I override the
operator new and operator delete functions to provide memory leak tracking
from within the extension.

When I use the code as part of a complete C++ program everything works
perfectly, however when I compile it with my Python interface code the
operator delete function is not called - the operator new function is
called as normal however. I assume this is because the function is not
linked correctly, but I'm at a loss for how to make the linker resolve the
references in the .so file.

Does anyone know a possible solution to my problem?
Regards,
Andrew Wilkinson

-- 
University is a fountain of knowledge, and students go there to drink.




From dialtone#NOSPAM#.despammed at aruba.it  Fri Jan 16 18:47:45 2004
From: dialtone#NOSPAM#.despammed at aruba.it (Valentino Volonghi aka Dialtone)
Date: Sat, 17 Jan 2004 00:47:45 +0100
Subject: I come not to bury C++, but to praise it...
References: <mailman.337.1074032524.12720.python-list@python.org>
	<bu3khe$dbm5v$1@ID-46268.news.uni-berlin.de>
	<100aq779r2h2c9e@corp.supernews.com>
	<donn-DF9867.09340714012004@nntp3.u.washington.edu>
	<100b266i0r70g86@corp.supernews.com>
	<donn-5BBDE3.14501814012004@nntp4.u.washington.edu>
Message-ID: <87ektzv4ke.fsf@vercingetorix.caesar.org>

Donn Cave <donn at u.washington.edu> writes:

> Python may have stricter dynamic typing than C++ has
> static typing, but that's hard to quantify.  On the
> other hand, Python has no static typing at all.  There
> is no way to tell it ``this function must be applied
> to a string and must return an int.''  If applied to
> a list instead, there's a non-trivial chance it will
> manage to do something absurd with it.  If it returns
> None under certain circumstances, there's a non-trivial
> chance that value will be stashed away somewhere and
> you'll later wonder where the heck that None came from.

You clearly don't know enough of python to talk like this about the
language features...

You need static typing (why then... I cannot see any good reason,
anyway...)? Well then, use pyrex. You'll find yourself writing code
like this:

cdef int a, b
def sum(int a, int b):
    return a+b

Then using pyrex parser you would build a python extension module
which you will compile it. If you do errors using types it will catch
it. Anyway there's no need to use this stuff... absolutely no
reasonable need. Except if you need a lot of speed and you need to
implement an algorithm directly in C using native C types and not
python objects.

-- 
Valentino Volonghi, Regia SpA, Milan
Linux User #310274, Gentoo Proud User


From seanl at chaosring.org  Sun Jan  4 17:39:21 2004
From: seanl at chaosring.org (Sean R. Lynch)
Date: Sun, 04 Jan 2004 14:39:21 -0800
Subject: Creating a capabilities-based restricted execution system
In-Reply-To: <bta2ng$16v7$1@nadya.doma>
References: <LmmdnUn4seDeGWuiXTWc-w@speakeasy.net>
	<vveg0bb6is2f60@news.supernews.com> <bt7lbp$ovg$1@panix2.panix.com>
	<vveohcpod4oje0@news.supernews.com> <bt82d7$ort$1@panix3.panix.com>
	<vvg0h93ue63c0b@news.supernews.com> <bta2ng$16v7$1@nadya.doma>
Message-ID: <YfqcnRE-qKeHC2WiXTWc-g@speakeasy.net>

Serge Orlov wrote:
> "John Roth" <newsgroups at jhrothjr.com> wrote in message news:vvg0h93ue63c0b at news.supernews.com...
> 
>>Much of this thread has focused on "capabilities" and the use of
>>proxies to implement capabilities. AFIAC, that's not only putting
>>attention on mechanism before policy, but it's putting attention on
>>mechanism in the wrong place.
> 
> 
> I'm not sure why it should be discussed here since Sean refered
> to E in the first post (http://www.erights.org/), so I think he's
> comfortable with the policy defined by E? I think he has
> missed the part that implementation should help as much as
> it can prevent leaking capabilities from one security domain to
> another. I pointed to that already.

I am comfortable (so far) with the policy defined by E. However, I've 
been learning more about that policy as I go, including the necessity of 
helping the programmer prevent leaks, which I've started to implement by 
making objects completely opaque by default and requiring that classes 
list attributes that they want to make public. I have kept my 
name-mangling scheme for private attributes. I'm working on making 
classes opaque while still allowing code to call methods defined on 
superclasses but only on self, not on other objects that happen to 
inherit from the same superclass.

>>What I *haven't* seen in this thread is very much consideration of
>>what people want from a security implementation.
> 
> 
> I think Sean is talking about his own implementation. I didn't
> see anywhere he said he's going to write general implementation
> for other people. He said what he wants from his implementation.

I would like my implementation to be as general as possible, but I'm 
writing it for my own projects. All this talk of "breaking existing 
code" and the like is not particularly relevant to me because, while I'd 
like code to look as much like regular Python as possible, it's simply 
not possible not to break existing code while helping the programmer 
prevent leaks. Making objects opaque by default is going to break a hell 
of a lot more code than not having a type() builtin, so I think people 
can see why I'm not too concerned about leaving various builtins out.

>>One problem I've been playing around with is: how would you
>>implement something functionally equivalent to the Unix/Linux
>>chroot() facility? The boundaries are that it should not require
>>coding changes to the application that is being restricted, and it
>>should allow any and all Python extension (not C language
>>extension) to operate as coded (at least as long as they don't
>>try to escape the jail!) Oh, yes. It has to work on Windows,
>>so it's not a legitimate response to say: "use chroot()."

This is an interesting problem, but not one I'm trying to solve here. 
I'm modifying RestrictedPython to make it possible to use a pure 
capabilities-based security model in an application server. The 
application server must scale to tens of thousands of security domains, 
and I see no reason why the security model can't or shouldn't be 
language-based instead of OS-based. There's E for Java, why can't we 
make something similar for Python? There is nothing particularly special 
about Java that makes it more suitable for E than Python is. Both have 
unforgeable references. I've already added object encapsulation. I'm 
working on eliminating any static mutable state.

Ultimately, I'd like to have user-level threads, too. I'm considering 
either using Stackless for this or doing some mangling of ASTs to make 
it easier to use generators as coroutines. Unfortunately, I can't think 
of a way for the compiler to tell that you're calling a coroutine from 
within a coroutine and therefore needs to output "yield (locals, 
resultvarname, func, args, kwargs)" instead of a regular function call 
without using some special syntax. Actually, I don't even know if it's 
possible to modify the locals dict of a running generator without 
causing trouble.


From jcarlson at nospam.uci.edu  Wed Jan 28 16:51:05 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Wed, 28 Jan 2004 13:51:05 -0800
Subject: Best way to compare a list?
In-Reply-To: <7b454334.0401281242.3bd604e6@posting.google.com>
References: <7b454334.0401271739.59267018@posting.google.com>
	<mailman.886.1075263140.12720.python-list@python.org>
	<7b454334.0401281242.3bd604e6@posting.google.com>
Message-ID: <bv9b0b$19p$1@news.service.uci.edu>

Fazer wrote:

> John Hunter <jdhunter at ace.bsd.uchicago.edu> wrote in message news:<mailman.886.1075263140.12720.python-list at python.org>...
> 
>>>>>>>"Fazer" == Fazer  <faizan at jaredweb.com> writes:
>>
>>    Fazer> Hello, I was wondering which would be the best way to
>>    Fazer> compare a list?
>>
>>    Fazer> I was thinking of just using a for loop and testing the
>>    Fazer> condition.
>>
>>    Fazer> What do you guys think?  The best/fastest way of comparing
>>    Fazer> lists.
>>
>>What do you want to compare for, equality of all elements?  Give a
>>little more info about what you need to do.  
>>
>>JDH
> 
> 
> Sorry about that.  
> 
> Basically, I have to lists.  I have to compare them and pick out the difference(s).
> 
> Maybe the simple/fast approach would be to use a for loop?
> 
> Thanks,

If position information matters to you, I would imagine your initial 
code is something like this...

import itertools
def list_differences(a, b):
     l = [(x,y) for x,y in itertools.izip(a,b) if x != y]
     if len(a) != len(b):
         d = abs(len(a)-len(b))
         if len(a) < len(b):
             l.extend(zip(d*[None], b[len(a):]))
         else:
             l.extend(zip(a[len(b):], d*[None]))
     return l

If position information matters, the above is pretty much optimal. 
There doesn't seem to be a method in Python that would further speed up 
iterating through two lists.

If positional information doesn't matter, and you just care about 
whether or not objects exist in one, the other, or both lists, then I 
believe this is easily done with Sets in Python 2.3.  I don't know for 
sure, I haven't used them yet.


  - Josiah


From trendmicro at wuest.de  Wed Jan 28 13:58:22 2004
From: trendmicro at wuest.de (trendmicro at wuest.de)
Date: Wed, 28 Jan 2004 19:58:22 +0100
Subject: Virus Alert
Message-ID: <20040128185822.6D53135F60@obelix.wuest.de>

The mail message (file: message.zip) you sent to leo at wuest.de contains a virus. (on obelix)



From LittleDanEhren at yahoo.com  Sat Jan 31 15:20:52 2004
From: LittleDanEhren at yahoo.com (Daniel Ehrenberg)
Date: 31 Jan 2004 12:20:52 -0800
Subject: Python vs. Io
References: <711c7390.0401291301.3f95794@posting.google.com>
	<qnkfzdyieg0.fsf@arbutus.physics.mcmaster.ca>
	<711c7390.0401301710.4353274@posting.google.com>
	<bvf6kc$2v$2@news.service.uci.edu>
Message-ID: <711c7390.0401311220.763be80a@posting.google.com>

> Perhaps it isn't more flexible.  On the other hand, it does allow anyone 
> to read your code and know that there isn't any magical syntax that is 
> usable on one Python x.y installation, that isn't on another.
> 
>   - Josiah

What are you talking about? There's tons of new "magical syntax" in
Python. Examples for "magical syntax" features that don't work on
1.5.2 include:
*List comprehensions
*String methods
*Generators
*Emulating numeric types
*Nested scopes
* * and ** in function declarations
*for line in this_file
*Subclassing types

There's tons of stuff still being added to Python.

Daniel Ehreberg


From jim-usenet at jimdabell.com  Wed Jan 14 17:23:57 2004
From: jim-usenet at jimdabell.com (Jim Dabell)
Date: Wed, 14 Jan 2004 22:23:57 +0000
Subject: The GPL / BSD cultural divide (was ProtoCiv: porting Freeciv to
	Python CANNED)
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<n22Nb.11299$9k7.210522@news.xtra.co.nz>
	<bu2pgs$d123a$1@ID-207230.news.uni-berlin.de>
	<4004EC9E.1E2E2893@alcyone.com> <bu3iv2$n2u$4@tyfon.itea.ntnu.no>
	<bu4dii$daqjq$1@ID-207230.news.uni-berlin.de>
Message-ID: <jPedne5B_KgeIpjdRVn-sw@giganews.com>

Brandon J. Van Every wrote:
[snip]
> OSS people are doing "their thing," and it is not my thing.
[snip]

So don't try working with OSS.  Open-source developers typically work under
different constraints to proprietary developers, and you will almost
certainly be unsuccessful if you attempt to impose a different set of
constraints upon them or assume they have the same priorities as
proprietary developers.

If you need people to work for you, hire them.


[Removing comp.lang.python from followups; this isn't anything to do with
Python.]

-- 
Jim Dabell



From mickel at csc.fi  Mon Jan 19 09:35:55 2004
From: mickel at csc.fi (=?ISO-8859-1?Q?Mickel_Gr=F6nroos?=)
Date: Mon, 19 Jan 2004 16:35:55 +0200 (EET)
Subject: Memory and speed with lots of objects on Tkinter.Canvases
Message-ID: <Pine.LNX.4.58.0401191624510.7811@sampo.csc.fi>

Hi everybody,

This is a question about Tkinter.Canvases and performance:

I am writing a Tkinter application that among other things contains a
number of Tkinter.Canvases that in turn hold rectangle and text objects
that can be moved along with clicking and dragging the mouse. Everything
works fine and well when I have just a few of these objects on the
canvases, but when the number of objects on the canvases grow over a
thousand, the application gets really sluggish. (I am running Python 2.3.2
on Redhat Linux 9 on a 866 MHz Pentium III with 256 MB of RAM (and approx.
0.5 GB of swap space, if that matters ...).)

Does anybody else have experience with having thousands of objects on
Tkinter.Canvases and how this impacts on the speed of the application? Are
there any nice tricks for tuning up performace when having lots of objects
on Tkinter.Canvases?

Help! :)

/Mickel

--
Mickel Gr?nroos, application specialist, linguistics, Research support, CSC
PL 405 (Tekniikantie 15 a D), 02101 Espoo, Finland, phone +358-9-4572237
CSC is the Finnish IT center for science, www.csc.fi



From Florian.Lindner at xgm.de  Thu Jan 22 07:34:56 2004
From: Florian.Lindner at xgm.de (Florian Lindner)
Date: Thu, 22 Jan 2004 13:34:56 +0100
Subject: prog/lib to draw graphs
Message-ID: <buofpq$1ra$06$1@news.t-online.com>

Hello,
I'm looking for a program or python library to draw graphs.
They should look like the that:


/--------\                         /--------\
| Node A | ------ belongs to ----> | Node B |
\--------/                         \--------/

Which is a result of the function call like that:

connectNodes(firstNode, secondNode, description, lineStyle)
connectNodes("Node A", "Node B", "belongs to", dashed)

It should have a open scalable vector format as output (DVI, SVG, PDF, ...)
and should be able to make automatic optimal placement of the items.
Do you know something like that?
Thx,
Florian


From brian at sweetapp.com  Fri Jan 23 20:35:46 2004
From: brian at sweetapp.com (Brian Quinlan)
Date: Fri, 23 Jan 2004 17:35:46 -0800
Subject: [OPINION] - does language really matter if they all do
 thesamething?
In-Reply-To: <028FD9F0-4E01-11D8-BB78-0003934ACDEC@zdome.net>
Message-ID: <046b01c3e21a$641bdac0$0000fea9@dell8200>

Dietrich wrote:
> Python seems to take the middle ground.  It's build from a procedural
> standpoint, in an environment where most things are objects and some
> are functions. 

I'd be interested to know why you don't think that functions are objects. I
would argue that they are because they have attributes, methods, and are
bound to variables the same way as other Python objects.

> It's not what I'd choose as an example of an object
> oriented language.  There are no messages, only function calls, so you
> can't capture them.

You certainly can capture them. Could you demonstrate the Objective-C or
Smalltalk syntax for doing so? Maybe it is a lot easier in those languages.

Cheers,
Brian




From alan.gauld at btinternet.com  Thu Jan 22 16:24:50 2004
From: alan.gauld at btinternet.com (Alan Gauld)
Date: Thu, 22 Jan 2004 21:24:50 GMT
Subject: Program Python in VIM
References: <871xpsc5zf.fsf@tulip.whu.ca> <r7xrvm1a.fsf@yahoo.co.uk>
Message-ID: <40103ee7.108130723@news.blueyonder.co.uk>

On Thu, 22 Jan 2004 19:08:33 +0000, Paul Moore
<pf_moore at yahoo.co.uk> wrote:
> Peter Wu <peterwu at hotmail.com> writes:
> > vi test.py
> > [key in some python code]
> > :wq

You should only need :w here. The q will close the window which
presumably you don't want?


> > :!python test.py
> >
> >
> > Is there any other way? I don't want to type 'python test.py' every time

:!!

repeats the last command.

However if you are using vim in a *nix terminal rather than the
GUI version you could use CTRL-Z to suspend vim then run python
foo.py from the shell prompt. Resume python, edit and CTRL Z
again. !! at the prompt will repeat the last run command.


> > ...In Emacs, I can simply fire C-c C-c to fire

:!! is probably the nearest direct equivalent.

Alan G.
Author of the Learn to Program website
http://www.freenetpages.co.uk/hp/alan.gauld


From deadlink27 at web.de  Fri Jan 30 09:56:30 2004
From: deadlink27 at web.de (Sebastian Stelzer)
Date: Fri, 30 Jan 2004 15:56:30 +0100
Subject: Get error "ImportError: No module named _tkinter"
References: <bvbhl1$1td$05$1@news.t-online.com> <bvbvu4$ip$1@panix2.panix.com>
Message-ID: <bvdqu5$thh$03$1@news.t-online.com>

Aahz wrote:

> In article <bvbhl1$1td$05$1 at news.t-online.com>,
> Sebastian Stelzer  <deadlink27 at web.de> wrote:
>>
>>    import _tkinter # If this fails your Python may not be configured for
>>    Tk
>>ImportError: No module named _tkinter
>>
>>I'am using Suse Linux 9.0 with Python 2.3.3.
> 
> You need to install Tck/Tk devel package, then rebuild Python.
I did it and I' got the same error.
Can you tell it more exactly please?


From __peter__ at web.de  Thu Jan 15 19:22:14 2004
From: __peter__ at web.de (Peter Otten)
Date: Fri, 16 Jan 2004 01:22:14 +0100
Subject: Inserting while itterating
References: <pan.2004.01.14.08.43.00.894047@thomas-guettler.de>
	<1074140382.26201.26.camel@dev.internal>
	<mailman.417.1074199910.12720.python-list@python.org>
Message-ID: <bu7al2$v79$04$1@news.t-online.com>

Skip Montanaro wrote:

>>>>>> "Mark" == Mark McEahern <mark at mceahern.com> writes:
> 
>     Mark> On Wed, 2004-01-14 at 02:43, Thomas Guettler wrote:
>     >> Hi,
>     >> 
>     >> Simple excerise:
>     >> 
>     >> You have a sorted list of integers:
>     ...
>     >> and you should fill all gaps:
>     ...
>     >> How would you code this?
>     >> 
>     >> Constrain: The original list should be changed, don't create a
>     >> copy.
> 
>     Mark> In the spirt of unit testing...
> 
>     Mark> #!/usr/bin/env python
>     ...
> 
> Here's a version which is much faster if you have large gaps and appears
> to be only marginally slower if you have small gaps.
> 
> Skip
> 
> #!/usr/bin/env python
> 
> #!/usr/bin/env python
> 
> def fillGaps1(seq):
      if  len(seq) == seq[-1]:
          raise Exception("nothing to do")
>     expectedLength = seq[-1] - seq[0] + 1
>     i = 1
>     while i < expectedLength:
>         if seq[i] - seq[i-1] > 1:
>             seq.insert(i, seq[i-1] + 1)
>         i += 1
> 
> def fillGaps(seq):
>     expectedLength = seq[-1] - seq[0] + 1
>     i = 1
>     while i < expectedLength:
>         if seq[i] - seq[i-1] > 1:
>             gap = seq[i-1] - seq[i]
>             fill = range(seq[i-1]+1, seq[i])
>             seq[i:i] = fill
>             i += len(fill)
>         i += 1
> 
> if __name__ == "__main__":
>     import timeit
> 
>     print "timing with one large gap:"
>     t = timeit.Timer(setup='from fillgaps import fillGaps1 as fillGaps',
>                      stmt='fillGaps([1, 5000])')
>     print "old fillgaps:", t.timeit(number=100)
>     t = timeit.Timer(setup='from fillgaps import fillGaps',
>                      stmt='fillGaps([1, 5000])')
>     print "new fillgaps:", t.timeit(number=100)
> 
>     print "timing with many small gaps:"
>     t = timeit.Timer(setup='from fillgaps import fillGaps1 as
>     fillGaps;l=range(1,5001,2)',
>                      stmt='fillGaps(l)')

I think the list should be initialized in the statement instead of the
setup. Otherwise subsequent passes will measure for range(1, 5000).

>     print "old fillgaps:", t.timeit(number=100)
>     t = timeit.Timer(setup='from fillgaps import
>     fillGaps;l=range(1,5001,2)',
>                      stmt='fillGaps(l)')
>     print "new fillgaps:", t.timeit(number=100)
> 
>     import unittest
>     class test(unittest.TestCase):
>         def test(self):
>             for fg in (fillGaps1, fillGaps):
>                 l = [1, 2, 4, 7, 8, 12]
>                 fg(l)
>                 self.assertEquals(l, range(1, 13))
> 
>                 l = [1, 5000]
>                 fg(l)
>                 self.assertEquals(l, range(1, 5001))
> 
>     unittest.main()

Here's another fillgap version:

def fillGapsPeter(seq):
    # inspired by anton muhin
    lo = seq[0]
    hi = seq[-1]
    seq[1:1] = range(lo+1, hi+1)
    while len(seq) > hi:
        i = seq.pop()
        seq[i-lo] = i

def fillGapsMark(seq):
    expectedLength = seq[-1] - seq[0] + 1
    i = 1
    while i < expectedLength:
        if seq[i] - seq[i-1] > 1:
            seq.insert(i, seq[i-1] + 1)
        i += 1

def fillGapsSkip(seq):
    expectedLength = seq[-1] - seq[0] + 1
    i = 1
    while i < expectedLength:
        if seq[i] - seq[i-1] > 1:
            gap = seq[i-1] - seq[i]
            fill = range(seq[i-1]+1, seq[i])
            seq[i:i] = fill
            i += len(fill)
        i += 1

if __name__ == "__main__":
    import timeit, fillgaps, sys
    fnames = [fname for fname in dir(fillgaps) if callable(getattr(fillgaps,
fname))]
    fnames.sort()
    for header, lst in [
        ("original test case", [1, 2, 4, 7, 8, 12]),
        ("timing with one large gap:", [1, 5000]),
        ("timing with many small gaps:", range(1, 5001, 2))]:
        print header
        for fn in fnames:
            t = timeit.Timer(setup='from fillgaps import %s as fillGaps' %
fn,
                        stmt='fillGaps(%s)' % (lst,))
            print "\t%s:" % fn, t.timeit(number=100)
        print
    import unittest
    class test(unittest.TestCase):
        def test_all(self):
            for fg in [getattr(fillgaps, fn) for fn in fnames]:
                l = [1, 2, 4, 7, 8, 12]
                fg(l)
                self.assertEquals(l, range(1, 13))

                l = [1, 5000]
                fg(l)
                self.assertEquals(l, range(1, 5001))
        def test_mine(self):
            """ Hard to prove I'm not cheating,
                hope I got it right...
            """
            class myint(int):
                def __repr__(self):
                    return "my" + int.__repr__(self)

            original = map(myint, [1, 2, 4, 7, 8, 12])
            l = list(original)
            fillGapsPeter(l)
            self.assertEquals(l, range(1, 13))
            for i in original:
                self.assert_(i is l[i-1])
                self.assert_(repr(i).startswith("my"))
    unittest.main()

My findings:

original test case
        fillGapsMark: 0.00151419639587
        fillGapsPeter: 0.00127387046814
        fillGapsSkip: 0.00162696838379

timing with one large gap:
        fillGapsMark: 0.872708797455
        fillGapsPeter: 0.0312719345093
        fillGapsSkip: 0.0336079597473

timing with many small gaps:
        fillGapsMark: 0.973310947418
        fillGapsPeter: 0.412738800049
        fillGapsSkip: 1.47315406799


Peter



From antonmuhin at rambler.ru  Fri Jan  9 14:30:10 2004
From: antonmuhin at rambler.ru (anton muhin)
Date: Fri, 09 Jan 2004 22:30:10 +0300
Subject: Variable Scope
In-Reply-To: <dcde6f.0401091107.45d464eb@posting.google.com>
References: <dcde6f.0401091107.45d464eb@posting.google.com>
Message-ID: <btmvkh$95gb6$1@ID-217427.news.uni-berlin.de>

Jens Thiede wrote:

> In the following terminal; could someone inform me as to why it is
> posible to print a global variable without having to declare it using
> global. This has affected some source of mine, and allows you to
> modify a global in a local scope *without* the global keyword, for
> instance, you can append to a global list, but *not* assign it a new
> value, for then, you create a new local variable. -- Why.
> 
> Python 2.3.2 (#1, Jan  3 2004, 23:02:08) 
> [GCC 3.2.3 20030422 (Gentoo Linux 1.4 3.2.3-r3, propolice)] on linux2
>     
> IDLE 1.0      
> 
>>>>x = 10;
>>>>def test():
> 
> 	x += 1;
> 
> 
> 
>>>>test();
> 
> 
> Traceback (most recent call last):
>   File "<pyshell#5>", line 1, in -toplevel-
>     test();
>   File "<pyshell#4>", line 2, in test
>     x += 1;
> UnboundLocalError: local variable 'x' referenced before assignment
> 
>>>>def test2():
> 
> 	print x;
> 
> 	
> 
>>>>test2();
> 
> 10
> 
> Any help would be appreciated,
> 
> Jens Thiede.

I suppose because Python prohibits rebinding of global variables, not 
modifications. You actually cannot change an integera (as an immutable 
type) with rebinding a varibale. Lists (as mutable types) allows 
modifications without rebinding. E.g.

l = []

def f1():
   l.append(0)

def f2():
   l = l + [0]

f1()
print l

f2()
print l

Python says:
[0]
Traceback (most recent call last):
   File "1.py", line 12, in ?
     f2()
   File "1.py", line 7, in f2
     l = l + [0]
UnboundLocalError: local variable 'l' referenced before assignment

regards,
anton.


From reidyre at yahoo.com  Wed Jan 21 18:12:59 2004
From: reidyre at yahoo.com (Ron Reidy)
Date: 21 Jan 2004 15:12:59 -0800
Subject: Compiling DCOracle2 on RH Linux 8.0
Message-ID: <ab425431.0401211512.6c698e00@posting.google.com>

All,

I am trying to compile DCOracle2 on RedHat 8.0 and make is giving me
the following error:

gcc -pthread -fPIC -DNDEBUG -g -O3 -Wall -Wstrict-prototypes
-I/usr/local/include/python2.3 -I/usr/local/include/python2.3 @DEFS@  
-I/oracle/app/oracle/9i/rdbms/demo
-I/oracle/app/oracle/9i/network/public
-I/oracle/app/oracle/9i/plsql/public
-I/oracle/app/oracle/9i/rdbms/public -DORACLE9i -c ././dco2.c -o
./dco2.o
gcc: cannot specify -o with -c or -S and multiple compilations


Did I do something wrong?

Thanks for your help.


From engsolnom at ipns.com  Sat Jan 10 14:40:23 2004
From: engsolnom at ipns.com (engsolnom at ipns.com)
Date: Sat, 10 Jan 2004 11:40:23 -0800
Subject: Simple Python Speed Benchmark
Message-ID: <n5k000ddhifqpemip0dedfsb9kkfjt0p5b@4ax.com>

Knowing absolutely zero about benchmarks, I was interested in the posting referencing the paper by
Dr. Cowell-Shah. I was curious how long Python takes just to read and display time.clock(), soI made
the simple test below.

I was amazed at the difference in speed depending on when/how the clock times were converted to
milliseconds....almost 4 to 1...as indicated in the RESULTS below. I understand the variation in the
times is probably due to other running processes.

Any explanation?

The machine used is: P3, 1gHz, 256 meg of ram, Windows 2000, Python 2.3

Also, I did duplicate the intArithmetic (intMaz), using 1,000,000,000, as per the paper, and it
*did* take a long time. I tried a variety of ways to implement the process (while, range, xrange,
etc), and made some improvement, but not much. And of course I did see the "out of memory" message.

Norm

# THE CODE

import time

module_time_start = time.clock()

start_time_1 = time.clock()
stop_time_1  = time.clock()
print 'Test 1: ', (stop_time_1 - start_time_1) * 1000

start_time_2 = time.clock() * 1000
stop_time_2  = time.clock() * 1000
print 'Test 2: ', stop_time_2 - start_time_2

def get_time_1():

    start_time_3 = time.clock()
    stop_time_3  = time.clock()
    duration = (stop_time_3 - start_time_3) * 1000
    print 'Test 3: ', duration

def get_time_2():
    start_time_4 = time.clock() * 1000
    stop_time_4  = time.clock() * 1000
    print 'Test 4: ', stop_time_4 - start_time_4

print '\nOK, now loop the methods...\n'

for ix in range(10):
    print
    get_time_1()
    get_time_2()

module_time_stop = time.clock()

print '\nTotal module time: \n', (module_time_stop - module_time_start) * 1000

# THE RESULTS:

Test 1:  0.00363174649292
Test 2:  0.0167619068904

OK, now loop the methods...


Test 3:  0.00810158833036
Test 4:  0.0145269859717

Test 3:  0.006984127871
Test 4:  0.0145269859717

Test 3:  0.00586666741164
Test 4:  0.0145269859717

Test 3:  0.00614603252648
Test 4:  0.0145269859717

Test 3:  0.00614603252648
Test 4:  0.013968255742

Test 3:  0.00586666741164
Test 4:  0.0128507952826

Test 3:  0.00586666741164
Test 4:  0.0136888906272

Test 3:  0.0055873022968
Test 4:  0.0136888906272

Test 3:  0.00642539764132
Test 4:  0.0145269859717

Test 3:  0.0108952394788
Test 4:  0.0145269859717

Total module time: 
2.89142893859


From tjreedy at udel.edu  Wed Jan 28 15:03:05 2004
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 28 Jan 2004 15:03:05 -0500
Subject: r prefix bug ... or my lack of understanding?
References: <bv8gtj$5ob$1@ngspool-d02.news.aol.com>
Message-ID: <bv94h9$3rs$1@sea.gmane.org>


"Bill Sneddon" <bsneddonNOspam at yahoo.com> wrote in message
news:bv8gtj$5ob$1 at ngspool-d02.news.aol.com...
> Below is from python 2.3.3 on windows.
> I have tryed on Pythonwin and Idle and on
> a Solaris unix build 2.2.2.
>
> I know there are work arounds but the behavior
> seems a bit strange to me.
>
>  >>> path = r'c:\data'   #this is fine
>  >>> print path
> c:\data
>
>  >>> path = r'c:\data\'
> Traceback (  File "<interactive input>", line 1
>      path = r'c:\data\'
>                       ^
> SyntaxError: EOL while scanning single-quoted string
>
>  >>> path = r'c:\data\\'
>  >>> print path
> c:\data\\

Behaves as per manual.

Note: for almost all usages, even on windows, normal Unix-style forward
slashes works as directory terminators and avoids backslash problems
entirely.

path = 'C:/data/'

Terry J. Reedy






From martin at v.loewis.de  Sun Jan  4 10:19:48 2004
From: martin at v.loewis.de (Martin v. Loewis)
Date: Sun, 04 Jan 2004 16:19:48 +0100
Subject: Filename type (Was: Re: finding file size)
In-Reply-To: <mailman.72.1073223899.12720.python-list@python.org>
References: <4V4Jb.12709$Vl6.2811218@news20.bellglobal.com>	<bt3l9i$pog$07$3@news.t-online.com>	<mailman.45.1073125105.12720.python-list@python.org>	<bt6c23$c6u$07$1@news.t-online.com>	<20040103165041.GA31412@nl.linux.org>
	<3FF740ED.9020909@rogers.com>	<mailman.68.1073206424.12720.python-list@python.org>	<bt8njq$gvd$00$1@news.t-online.com>
	<mailman.72.1073223899.12720.python-list@python.org>
Message-ID: <bt9aug$rvm$06$1@news.t-online.com>

Gerrit Holl wrote:

>>Are unicode filenames something we should care about?
> 
> 
> That's a difficult issue. I don't know how to solve that. 

It depends on the platform. There are:

1. platforms on which Unicode is the natural string type
    for file names, with byte strings obtained by conversion
    only. On these platforms, all filenames can be represented
    by a Unicode string, but some file names cannot
    be represented by a byte string.
    Windows NT+ is the class of such systems.
2. platforms on which Unicode and byte string filenames
    work equally well; they can be converted forth and
    back without any loss of accuracy or expressiveness.
    OS X is one such example; probably Plan 9 as well.
3. platforms on which byte strings are the natural string
    type for filenames. They often have only a weak notion
    of file name encoding, causing
    a) not all Unicode strings being available as filenames
    b) not all byte string filenames being convertible to
       Unicode
    c) the conversion may depend on user settings, so for
       the same file, Unicode conversion may give different
       results for different users.
    POSIX systems fall in this category.

So if filenames where a datatype, I think they should be
able to use both Unicode strings and byte strings as their
own internal representation, and declare one of the two
as "accurate". Conversion of filenames to both Unicode
strings and byte strings should be supported, but may
fail at runtime (unless conversion into the "accurate"
type is attempted).

Regards,
Martin



From premshree_python at yahoo.co.in  Tue Jan 13 15:00:29 2004
From: premshree_python at yahoo.co.in (=?iso-8859-1?q?Premshree=20Pillai?=)
Date: Tue, 13 Jan 2004 20:00:29 +0000 (GMT)
Subject: Python
In-Reply-To: <d88cf0080cd0462d2aab21812a04e09b@localhost.talkaboutprogramming.com>
Message-ID: <20040113200029.89255.qmail@web8304.mail.in.yahoo.com>

Is that possible??
Maybe you could use C++ within Py, eh?

-Premshree
[http://www.qiksearch.com/]

 --- sandhya <sandhya.hariharan at sap.com> wrote: > How
to generate a .pyd file from a c++ file??
> 
> plz do respond
> 
> thanks
> regards
> Sandhya
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list 

________________________________________________________________________
Yahoo! India Mobile: Download the latest polyphonic ringtones.
Go to http://in.mobile.yahoo.com



From jcarlson at nospam.uci.edu  Mon Jan 26 19:26:49 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Mon, 26 Jan 2004 16:26:49 -0800
Subject: compress string of data
In-Reply-To: <mailman.815.1075153424.12720.python-list@python.org>
References: <bv0gev$2ni$1@nsnmrro2-gest.nuria.telefonica-data.net><mailman.765.1075042168.12720.python-list@python.org><wz4quj116k.fsf@nono.cs.uu.nl>	<bv3bdd$a0j$3@news.service.uci.edu>
	<mailman.815.1075153424.12720.python-list@python.org>
Message-ID: <bv4bca$3or$1@news.service.uci.edu>

Terry Reedy wrote:

> "Josiah Carlson" <jcarlson at nospam.uci.edu> wrote in message
> news:bv3bdd$a0j$3 at news.service.uci.edu...
> 
>>Piet van Oostrum wrote:
>>
>>
>>>>>>>>Gerrit Holl <gerrit at nl.linux.org> (GH) wrote:
>>>
>>>
>>>>>How i could compress string of data?.
>>>>>
>>>>>
>>>>>>>import zlib
>>>>>>>zlib.compress("Hello, world")
>>>
>>>GH> 'x\x9c\xf3H\xcd\xc9\xc9\xd7Q(\xcf/\xcaI\x01\x00\x1b\xd4\x04i'
>>>
>>>GH> http://www.python.org/doc/current/lib/module-zlib.html
>>>
>>>Waw, that compresses it from 12 bytes to 20 bytes :=)
>>
>>
>>There is no such thing as universal compression
> 
> 
> Only if you specify invertibility (losslessness).
> 
> f(s) == '' compressess everything except '' itself ;-)
> 
> and that len(f(s)) < len(s) for some s and not just <= for all s (which
> allows identity 'compression' f(s) == s).
> 
> 
>>- some compressions  result in expansion.
> 
> 
> Which is to say that if a 1-1 function maps some strings to smaller
> strings, it must correspondingly map others to larger strings.  An
> interesting CS tidbit that people keep discovering by stumbling over.
> 
> Lossless universal expansion is possible: f(s) == ' '+s.  But it is into
> rather than onto, so only strings starting with ' ' can be inversely
> mapped.

Exactly (I was too short on time to say the equivalent this morning, and 
even if I had said the equivalent, it likely would not have been as clear).

  - Josiah


From bichoverde at sapo.pt  Mon Jan 12 08:05:19 2004
From: bichoverde at sapo.pt (Bicho Verde)
Date: Mon, 12 Jan 2004 13:05:19 -0000
Subject: Why learn Python ??
Message-ID: <40029dad$0$28706$a729d347@news.telepac.pt>

I have now free time and money to do what I want :-)
     I have some basic skills in programming (C, Pascal, Macromedia
Actionscript) but don't know exactly what to do in the world of programming.
    And also I don't know exactly why would I learn Python rather than C#,
C++ or Perl. Basicaly I don't know where to start, if there is much to do or
if it is has it seems and there is software to everything nowadays and so
doesn't make sense to spend time in learning a programming language.
    I just have this idea that I would like to contribute to the curve of
accelarated exponential progress (technological singularity), artificial
intelligence and so on. From that point of view there is much to do... But
can I stand for it and where to start?
      Anyone would help me and give me some hints?

-BichoVerde




From cookedm+news at physics.mcmaster.ca  Mon Jan 12 10:58:31 2004
From: cookedm+news at physics.mcmaster.ca (David M. Cooke)
Date: Mon, 12 Jan 2004 10:58:31 -0500
Subject: Python is far from a top performer according to benchmark
 test...
References: <ryELb.238$tK2.228@amstwist00> <btn5db$2f8$1@absinth.dialog.net.pl>
	<pan.2004.01.09.21.35.40.132608@yahoo.com>
	<6ee58e07.0401092129.302cb9d4@posting.google.com>
	<pan.2004.01.11.06.08.18.867825@yahoo.com>
	<6ee58e07.0401120542.5d79090d@posting.google.com>
Message-ID: <qnk8ykdp3a0.fsf@arbutus.physics.mcmaster.ca>

At some point, llothar at web.de (Lothar Scholz) wrote:

> Samuel Walters <swalters_usenet at yahoo.com> wrote in message news:<pan.2004.01.11.06.08.18.867825 at yahoo.com>...
>
>> I know very little about numeric processing, and even less about Fortran.
>> It's true that my background is in mathematics, but in *pure* mathematics
>> where pointer-based languages tend to be helpful, not hurtful.  
>
> Okay seems that you don't know a lot about compiler writing.
>
> A C compiler only knows a little bit about the context so it must
> always assume that a data inside a member can be referenced from
> another place via an alias pointer.
>
> Fortran does not have this problem so a lot of optimizations can be
> done and values can be hold in registers for a much longer time,
> resulting in much greater speed.
>
> Remember that on supercomputers a 25% spped enhancement (which a good
> fortran compiler is faster then C) can mean a few million dollars of
> saved hardware costs. The coding time is not importing compared to the
> running time. So real hard numerics are always done in Fortran.
>
> GNU Fortran is a stupid project because it translates the Fortran code
> to C.

Err, no. You're thinking of f2c. GNU Fortran uses the same backend as
the GNU C compiler, in that it translates to the same intermediate
language (sort of assembly language) on which optimizations are done.
But the C front end and the Fortran front end are separate.

The advantage of GNU Fortran is it's *portable*. It runs on everything
that GCC works on -- which is a lot. This makes a difference when
you're developing (like on my Apple iBook running Linux). And it looks
like the G95 project is humming along nicely.

> Python for hardcore numerics, even with PyNumerics, is simply a very
> bad solution.

You're not limited to pure Python.

No one's saying you must use only C, or only Fortran, or only Python.
Use the best tool for the job. Python just has the advantage that
mixing C and Fortran into it is easy. Write your big, number-crunching
code as a Fortran routine, wrap it with f2py, then add a Python script
around it to run it. Presto, no fiddling with Fortran for reading in
input files, or output files (depending on your routine). You can even
write a GUI in Python if you wish. Or add a webserver.

-- 
|>|\/|<
/--------------------------------------------------------------------------\
|David M. Cooke
|cookedm(at)physics(dot)mcmaster(dot)ca


From andreas.lobinger at netsurf.de  Tue Jan 20 04:20:35 2004
From: andreas.lobinger at netsurf.de (Andreas Lobinger)
Date: Tue, 20 Jan 2004 10:20:35 +0100
Subject: Fw: PDF library for reading PDF files
References: <mailman.464.1074430854.12720.python-list@python.org>
	<400BFF7B.95F21050@netsurf.de>
	<mailman.534.1074585531.12720.python-list@python.org>
Message-ID: <400CF2E3.29506EAE@netsurf.de>

Aloha,

Peter Galfi schrieb:
> Thanks. I am studying the PDF spec, it just does not seem to be that easy
> having to implement all the decompressions, etc. The "information" I am
> trying to extract from the PDF file is the text, specifically in a way to
> keep the original paragraphs of the text. I have seen so far one shareware
> standalone tool that extracts the text (and a lot of other formatting
> garbage) into an RTF document keeping the paragraphs as well. I would need
> only the text.

As others wrote here, the simplest solution is to use a external
pdf-2-text programm and postprocess the data. Read comp.text.pdf

There is no simple and consistent way to extract text from a .pdf
because there are many ways to set text. The optical impression
of a paragraph may not be represented by a similar command structure 
in the .pdf.

Adobe recognized the difficulties for document reuse and introduced
tagged .pdf in 1.4. With tagged-pdf it is possible to insert
structural information in the .pdf. If you are interested in
using this, contact me.

Wishing a happy day
		LOBI


From eric-amick at comcast.net  Mon Jan 26 20:15:22 2004
From: eric-amick at comcast.net (Eric Amick)
Date: Mon, 26 Jan 2004 20:15:22 -0500
Subject: Single and double asterisks preceding variables in function
	arguments
References: <bv3d4e$1h7$1@newshost.mot.com>
Message-ID: <iseb10h7su5g31u9e7su6hd2kpkorj0g7a@4ax.com>

On Mon, 26 Jan 2004 09:51:02 -0600, Stephen Boulet
<stephendotboulet at motorola_._com> wrote:

>I've run across code like "myfunction(x, *someargs, **someotherargs)", 
>but haven't seen documentation for this.
>
>Can someone fill me in on what the leading * and ** do? Thanks.

Try section 4.7.2 of the tutorial.

-- 
Eric Amick
Columbia, MD


From jjl at pobox.com  Sun Jan 11 09:14:55 2004
From: jjl at pobox.com (John J. Lee)
Date: 11 Jan 2004 14:14:55 +0000
Subject: help with Python Environment For Blind User
References: <tH2Mb.6292$EL4.3998@nwrddc02.gnilink.net>
Message-ID: <87hdz2lggw.fsf@pobox.com>

"Zachary" <vzd1s1fs at verizon.net> writes:

> I'm a blind non-programmer trying to learn Python.
> I've got python 2.3 for windows, but the problem is that Idle doesn't seem
> to work two well with my screen reading program.
> Is notepad, then, my only other real choice?  Pythonwin worked similarly
> badly.
> The problem is my programs inability to track the cursor.  It doesn't tell
> me what line I'm on, where I am in that line, or what I just deleted.  It
> would do this in a normal editor.
> Any help with this would be appreciated.

There have been several threads on this in the past:

http://www.google.com/groups?as_q=blind%20whitespace%20group%3Acomp.lang.python&safe=images&ie=ISO-8859-1&lr=&num=30&hl=en


Including one from T. V. Raman, author of emacspeak, revealing that
emacs / python-mode works for blind users (emacs is vi's enemy in the
endless emacs-vi editor war ;-).

Whichever editor you choose (toss a coin), be prepared for a struggle:
editors like vi and emacs are an *entirely* different species to
something like notepad.  It's certainly worth it in the end.


John


From vitali_vg at yahoo.com  Fri Jan 23 16:23:55 2004
From: vitali_vg at yahoo.com (Vitali Gvozdev)
Date: 23 Jan 2004 13:23:55 -0800
Subject: How to place window on top?
Message-ID: <b8d5e726.0401231323.586f57f1@posting.google.com>

Hi,

Using win32 extensions and windows scripting, I'm trying to open an
application in Windows2K to send some keystrokes to it. But every time
the application window is openning below other windows and key are
sent to the applications, which should not be affected.

WshShell = win32com.client.Dispatch('WScript.Shell')
...
def Initialize(theCommand, theName):
    if not WshShell.AppActivate(theName):
        WshShell.Run(theCommand)
...
Can you explain me how to put the desired window on top (switch
focus)?


From donn at u.washington.edu  Tue Jan 13 12:48:57 2004
From: donn at u.washington.edu (Donn Cave)
Date: Tue, 13 Jan 2004 09:48:57 -0800
Subject: C++ bad-mouthing (was: Why learn Python ??)
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<7xisjh1e3i.fsf@ruckus.brouhaha.com>
	<10064loqc7sd7e3@corp.supernews.com>
	<7xeku496wx.fsf@ruckus.brouhaha.com>
	<donn-9D2291.16343412012004@nntp6.u.washington.edu>
	<40041576.D070723E@engcorp.com>
Message-ID: <donn-8DC721.09485713012004@nntp6.u.washington.edu>

In article <40041576.D070723E at engcorp.com>,
 Peter Hansen <peter at engcorp.com> wrote:

> Donn Cave wrote:
> > 
> > Python has the advantage of a clean start, but
> > from a software engineering standpoint it really seems like a
> > hacker language.  
> 
> Ohh.... nice controversial statement. :-)
> 
> I would strongly disagree with the above statement for a number
> of reasons, including (random thoughts):
> 
>  - packages
>  - interactive interpreter
>  - no static typing
>  - high productivity
>  - ease of testing
>  - flexibility
>  - extremely broad library support
>  - low learning curve
> 
> and probably a dozen others.  I think this has all been discussed before,
> though, so I won't belabour the point.  Basically, as a software engineer
> (nominally a "Systems Design Engineer") I find Python to be hands down 
> *the* best language I've encountered for use in serious work.  I can't
> actually think of another which excels on so many fronts.

But your list describes the perfect hacker language, at
least on some counts.  I'm nominally a Software Engineer
myself, but I have no formal CS education and have never
worked on a large project, so I feel right at home with
the hacker culture here.  But help me out here, suppose
we're going to go in and develop one of those massive
projects - I don't know, say the IRS needs a new computer
system - what on that list would we care about?

Maybe vague promises like high productivity and ease of
testing would be attractive, but anyone can say that for
some ideal context.  Library support is probably not even
on the charts.  I would think a major consideration at
the outset of a project like this would be whether the
code that all these teams is writing will eventually come
together and work like it's supposed to, and from that
point of view it's tempting to look for some support for
architectural consistency, like "interfaces" and that sort
of thing.

   Donn Cave, donn at u.washington.edu


From djmitchell at spamfree.optushome.com.au  Thu Jan 29 19:11:06 2004
From: djmitchell at spamfree.optushome.com.au (David Mitchell)
Date: Fri, 30 Jan 2004 11:11:06 +1100
Subject: TCP server as a Windows service using Python?
Message-ID: <pan.2004.01.30.00.11.06.642734@spamfree.optushome.com.au>

Hello group,

I'm trying to create a TCP server using Python, and I want it to run under
Windows as a service.

Now, I'm fine with building the TCP server using Python - done it lots of
times, and I know there's lots of sample code out there I can grab if I
ever need to.

Equally, I think I've got the simpler concepts about creating Windows
services using Python clear.  I've got the Python Win32 book, worked
through the example code in there and haven't had any real problems with
it.

Where I'm having trouble is with the overlapped I/O call.  When I create a
TCP server, I need to have it sit there waiting for a client
connection.  With a Windows service, it has to sit there waiting for
administrative messages such as e.g. a "stop service" message.  The
example code in the Python Win32 book uses named pipes to do IO -
I'm constrained to using TCP sockets.

I can't see how to let the service accept *either* an incoming TCP client
connection *or* an e.g. "stop service" message.  If someone could point me
to some sample code, I'd greatly appreciate it - Google hasn't been
helpful.

Thanks in advance

Dave M.


From neanthumain at yahoo.com  Sat Jan 10 19:43:41 2004
From: neanthumain at yahoo.com (N?ant Humain)
Date: 10 Jan 2004 16:43:41 -0800
Subject: Providing Default Value for User Input
Message-ID: <e3b4dc29.0401101643.3ea15ae3@posting.google.com>

I have just begun learning Python so that I can write a simple script
to make modification of a file used by another Python script easier.
This file is basically a list of regular expressions. What I want to
do is allow the user to select one of these regular expressions to
modify, but I've realized I know of no way to provide a default value
for user input. I could choose to show the regular expression the user
has chosen and simply allow the user to retype it and modify it from
there, but that is time consuming and error prone. Does Python support
a way to do this? If worse comes to worst, is there a way I could
write such code on my own without having to write a C-based module
(I'd like to stick to Python code only since some users will be
running this script on Windows without a C compiler)?


From rob02omni at vodafone.it  Tue Jan 13 08:47:25 2004
From: rob02omni at vodafone.it (Roberto)
Date: Tue, 13 Jan 2004 14:47:25 +0100
Subject: Embedded python reference
Message-ID: <bu0s5a$1nf$1@grillo.cs.interbusiness.it>

Hi there,

I've compiled the demo example demo/embed/demo.c succesfully.

Just a question : how i can reconstruct (and make my exe to point to) the
directories of python ??

For exmpale if i use the zlib.pyd i want to make it avaiable in DLLs just
the way it is in python path.

Also i wonder about classes if i use a class.py in my embedded python c
program how it works? (can "clone" all the pythons path?).

Thanks,
Rob

-- 
Roberto Federici

.:: SAEC - Studio Associato Enrico e Catozzo & C.
.:::: Fraz. Pont Suaz, 104 Charvensod (AO)
.:::::: Tel. 0165-43149 - Fax 0165-230153
.:::::::: info at saec.net www.saec.net

**********************************************************************
Ai sensi della legge n. 675/1996 si informa che :

Questa email (e relativi allegati) contiene informazioni riservate
indirizzate ai soli destinatari.
E' fatto esplicito divieto di utilizzare i contenuti per qualsiasi scopo.
E' fatto altres? divieto di utilizzare gli indirizzi email per attivit?
indesiderate e/o non richieste (spamming).

In caso di ricevimento per errore vi preghiamo di segnalarlo a info at saec.net
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From jacek.generowicz at cern.ch  Fri Jan  9 04:42:35 2004
From: jacek.generowicz at cern.ch (Jacek Generowicz)
Date: 09 Jan 2004 10:42:35 +0100
Subject: metadocumentation (keyword help)
References: <tyfn091gnk5.fsf@pcepsft001.cern.ch>
	<mailman.144.1073405082.12720.python-list@python.org>
	<3ffb0edf$1@nntp0.pdx.net> <tyfhdz8gn8k.fsf@pcepsft001.cern.ch>
	<d69wnik0.fsf@python.net> <tyfbrpggc6u.fsf@pcepsft001.cern.ch>
	<4de76ee2.0401081318.bab6f62@posting.google.com>
Message-ID: <tyffzepfofo.fsf@pcepsft001.cern.ch>

David,

Thank you for your refreshingly constructive followup.

davidb at mcs.st-and.ac.uk (David Boddie) writes:

> Jacek Generowicz <jacek.generowicz at cern.ch> wrote in message news:<tyfbrpggc6u.fsf at pcepsft001.cern.ch>...
> > [...] 
>
> revealed that the basic information about the PYTHONDOCS environment
> variable can be found at the foot of the following page:
> 
>     http://www.python.org/dev/doc/devel/lib/module-pydoc.html

This strikes me as not very helpful to someone looking to solve the
problem of _keyword_ documentation not working. Remember, we're
talking about poor lost newbies.

> > If these instructions are, as it seems, absent, then I would
> > appreciate advice on what I can do to make them appear in the
> > appropriate place, and what the appropriate place might be.
> 
> They could always be written up in the PythonInfo Wiki, then at
> least you have a python.org URL to give your students.

I hadn't thought of that opiton. Thanks.

> > I recognize my impatience with poor documentation as a pathological
> > flaw in my characer, which is why I am asking for help in
> > finding/creating this documentation here.
> 
> You're going to have to be quite patient, though. If the documents
> you want aren't obvious then it's probably up to you to write them. :-/

That is exactly what I was implying with my use of the word "creating".

> David
> 
> P.S. You'll note that I haven't come up with my own recipe so far.
> For what it's worth, a document describing how to obtain help on
> keywords might start in the following way:
> 
> Configuring Python to supply help on keywords
> =============================================
> 
> Introduction
> ------------
> Recent versions of Python include the ability to display help on
> existing objects, or to search for information on installed modules,
> from within the interactive environment. However, it is also possible
> to use the help system to display information on the keywords used
> in the language itself, such as "if" and "for. This feature appears
> to be less well-known, possibly because users seek basic language
> information elsewhere, but maybe also because it is not always
> enabled by default.
> 
> Requirements
> ------------
> In order to seek help on keywords from within the interactive
> environment, two things need to be done before Python is invoked:
> 
>  * The HTML documentation needs to be downloaded and installed in an
>    accessible location; this will depend on the operating system in
>    use.
>  
>  * The PYTHONDOCS environment variable will need to be set to the
>    path of the installed HTML files.
> 
> Setting it up
> -------------
> First of all, check whether the HTML documentation has already been
> installed for the version of Python you are using. This could save
> you the effort of downloading and installing it manually.
> 
> If the documentation is required then go to::
> 
>   http://www.python.org/download/
>
> and find the appropriate documentation. Download it and install it
> in a place where it can be read by those who will be using it.

How about 

  If the documentation is required then go to:
  
    http://www.python.org/doc/<python-version>/download.html
 
  and download the HTML documention and install it in a place where it
  can be read by those who will be using it.

?

> Checking it works
> -----------------
> Using the appropriate method provided by your operating system, set
> the PYTHONDOCS environment variable to the directory which contains
> the main index file for the documentation.
> 
> For example, you may have installed the documentation in
> /usr/share/doc/python so that the directory layout look like::
> 
>   /usr/share/doc/python
>   |- Misc
>   |- README
>   \- html
>      |- about.html
>      |- acks.html
>      |- api/
>      |- dist/
>      |- doc/
>      ...
> 
> and so on. Therefore, PYTHONDOCS should be set to /usr/share/doc/python/html
> since this contains the information required. On Linux systems, using the
> bash shell, you might type::
> 
>   export PYTHONDOCS=/usr/local/share/python/html python
> 
> to start the interpreter. Within the Python environment, typing::
> 
>   help("if")
> 
> should now cause something like the following to be displayed::
> 
>   7.1 The if statement
>   
>     The if statement is used for conditional execution:
>     
>           if_stmt   ::=    "if" expression[1] ":" suite[2]
>                            ( "elif" expression[3] ":" suite[4] )*
>                            ["else" ":" suite[5]]
>   
>     Download entire grammar as text.[6]
>   
>     It selects exactly one of the suites by evaluating the expressions one
>     by one until one is found to be true (see section 5.10[7] for the
>     definition of true and false); then that suite is executed (and no other
>     part of the if statement is executed or evaluated). If all expressions
>     are false, the suite of the else clause, if present, is executed.
> 
> Enabling this by default
> ------------------------
> Any ideas?

I guess this would require the HTML documentation to be bundled in
with the Python distribution tarball, and I can imagine that being an
unpopular suggestion.


Now, currently one gets the following from Python's built-in help:

  >>> help('if')
  
  Sorry, topic and keyword documentation is not available because the Python
  HTML documentation files could not be found.  If you have installed them,
  please set the environment variable PYTHONDOCS to indicate their location.

How about augemnting this with something like:

  The HTML documentation files can be obtained from 

    http://www.python.org/doc/<python-version>/download.html

?


And then there's the wart surrounding the following:

  lambda, and, not, or  

I always get 

  could not read docs from $PYTHONDOCS//ref/lambda.html

Note, I even get 'lambda.html' in the message when asking for help on
the other three. Any ideas what's going on there ?


Furthermore, is there anyway of getting help of keywords via pydoc ?


From zensunni at rochester.rr.com  Sat Jan 24 23:24:15 2004
From: zensunni at rochester.rr.com (Brian Samek)
Date: Sun, 25 Jan 2004 04:24:15 GMT
Subject: Newbie Nested Function Problem
References: <O4GQb.12838$Tk3.10642@twister.nyroc.rr.com>
	<mailman.753.1075001453.12720.python-list@python.org>
Message-ID: <PxHQb.43576$Fe1.27129@twister.nyroc.rr.com>

Oh wow!  Thanks a lot - that was exactly the issue.  I changed the variable name and the program works perfectly now.  I didn't realize that a variable name in a program would have that effect.

Brian
  "Rich Krauter" <rmkrauter at yahoo.com> wrote in message news:mailman.753.1075001453.12720.python-list at python.org...
  Looks like you are setting the variable 'leave' to the user input, and then you are calling the function leave(), but remember that 'leave' has been set to some string.
  So say you enter 'xqz', and expect it to restart the loop when you get to the leave call --- well, what you are doing is trying to call the function xqz().
  Rich
  On Sat, 2004-01-24 at 21:45, Brian Samek wrote: 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20040125/f323b78b/attachment.html>

From peter at engcorp.com  Tue Jan  6 13:49:27 2004
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 06 Jan 2004 13:49:27 -0500
Subject: Speed?
References: <mailman.41.1073113311.12720.python-list@python.org>
	<3FFABBA8.3A24716F@engcorp.com>
	<mailman.145.1073406487.12720.python-list@python.org>
Message-ID: <3FFB0337.64806341@engcorp.com>

Skip Montanaro wrote:
> 
>     [ on creating benchmarks ]
> 
>     Peter> And with Python, of course, it's almost trivial to do this kind
>     Peter> of thing, compared to some other languages.  Sigh.
> 
> Which was just another data point in your decision, right?  After all, if
> Python is so much easier to write your benchmarks in than some/most/all of
> the alternatives, that has to factor into the choice of implementation
> language.

Well, I suppose it would have been a factor in the decision, if the
decision had really been about which language to use.  In fact in this
case we had already picked Python as a key technology, but needed to
see whether the performance of the hardware was adequate to support its
use.  Doing it with C was an alternative, but we'd already tried a 
prototype with C and concluded that while performance was fine, naturally,
we would not complete the required feature set in our lifetimes (or at
least in our funding's lifetime ;-) ).

To be completely honest: we ended up picking faster hardware in the long
run, but the choice was more because the trial platform was too limited
in RAM and ROM memory (1MB each) and had an inadequate development 
platform.  The final choice (as I mentioned in another thread today) uses
32MB RAM and ROM (Compact Flash actually) and happens to run at 100MHz
instead of the 33MHz of the first one.

Tying this in with yet another thread: we have spent next to no time
optimizing, so far, because we're still adding features and making things
work.  I firmly believe we could have optimized the code for the 
original 33MHz system to a point where it would have run acceptably,
and still in much less time than it would have taken to get a C version
running (that was the alternative possibility).  I'm just happy we 
were able to buy our way out of having to spend a lot of time optimizing.

In summary: we picked Python for reasons relating to ease of use
(development and maintenance) and flexibility, and performance was 
really not a significant issue.  As I've said before, we've written 
literally hundreds of programs with it, ranging from small utilities 
to major products, and have only *very* rarely had to pause to consider
performance and spend time optimizing anything.  Python is *not* slow!

-Peter


From jason at tishler.net  Thu Jan 29 09:56:37 2004
From: jason at tishler.net (Jason Tishler)
Date: Thu, 29 Jan 2004 09:56:37 -0500
Subject: Error under Cygwin - threading module
In-Reply-To: <20040128173040.37859.qmail@web21108.mail.yahoo.com>
References: <20040127150408.GB1204@tishler.net>
	<20040128173040.37859.qmail@web21108.mail.yahoo.com>
Message-ID: <20040129145637.GD920@tishler.net>

AdSR,

Please keep you replies on-list.

On Wed, Jan 28, 2004 at 09:30:40AM -0800, Artur de Sousa Rocha wrote:
> --- Jason Tishler <jason at tishler.net> wrote:
> > I "spoke" too soon -- I was able to reproduce the problem after 160
> > iterations.  Please try the latest snapshot:
> > 
> >     http://cygwin.com/snapshots/
> > 
> > and report back whether or not this solves your problem.
> 
> I installed the latest snapshot of cygwin1.dll
> (cygwin1-20040126.dll.bz2).  The problem persists, error messages show
> about as often as previously.

Thanks for trying the above.

Please post your problem to the Cygwin mailing list <cygwin at cygwin
dot com> -- we will get more traction there.  I will attempt to help
when I see your post.

Thanks,
Jason

-- 
PGP/GPG Key: http://www.tishler.net/jason/pubkey.asc or key servers
Fingerprint: 7A73 1405 7F2B E669 C19D  8784 1AFD E4CC ECF4 8EF6



From mailund at birc.dk  Wed Jan 14 15:21:41 2004
From: mailund at birc.dk (Thomas Mailund)
Date: Wed, 14 Jan 2004 21:21:41 +0100
Subject: Cyclic garbage collection and segfaults...
Message-ID: <pan.2004.01.14.20.21.41.430958@birc.dk>


Hi group.

I have a problem with some C extensions I am working with and
hope that some of you can help.  Basically, I am wrapping a a tree
structure from C where I have python methods for extracting either the
entire tree or subtrees; since I don't want the full tree to be
deallocated while python has references to the subtrees, I INCREF the
full tree whenever I hand out a subtree reference.  I don't want any of
the subtrees to be deallocated while the full tree lives, either, so I
want the fulltree to have a reference to each of the subtrees.  Naturally,
this gives me a cyclik reference structure, and I want to be able to
garbage collect it.  But this is where my problems begin...

For some reason, when I turn on the cyclic garbage collection for my
types, a deallocation automatically gives me a segfault.  That is, if my
type new type contains any data whatsoever, I cannot garbage collect
without dumping core.  I have boiled the problem down to the code shown
below.  It contains no cyclic structure, it is as simple as it gets, but
it still seqfaults for me.  If I comment out the magic void-pointer (which
isn't used for anything) I don't get the segfault.


#include <Python.h>

struct SimpleObject;

static PyObject *	Simple_new     (PyTypeObject	 	    *type,
					PyObject  		    *args,
					PyObject            	    *kwds);
static int		Simple_init    (struct SimpleObject 	    *self,
					PyObject	            *args,
					PyObject 		    *kwds);
static int              Simple_traverse(struct SimpleObject         *self,
					visitproc                    visit,
					void                        *arg);
static void		Simple_dealloc (struct SimpleObject         *self);




typedef struct SimpleObject {
    /* object stuff */
    PyObject_HEAD

    /* dark magic */
    void *magic;

} SimpleObject;


static PyTypeObject simple_SimpleType = {
    PyObject_HEAD_INIT(NULL)
    0,					/*ob_size*/
    "simple.Simple",			/*tp_name*/
    sizeof(SimpleObject),  		/*tp_basicsize*/
    0,					/*tp_itemsize*/
    (destructor)Simple_dealloc, 	/*tp_dealloc*/
    0,					/*tp_print*/
    0,					/*tp_getattr*/
    0,					/*tp_setattr*/
    0,					/*tp_compare*/
    0,					/*tp_repr*/
    0,					/*tp_as_number*/
    0,					/*tp_as_sequence*/
    0,					/*tp_as_mapping*/
    0,					/*tp_hash */
    0,					/*tp_call*/
    0,					/*tp_str*/
    0,				        /*tp_getattro*/
    0,				        /*tp_setattro*/
    0,					/*tp_as_buffer*/
    Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC, /*tp_flags*/
    "Simple objects",		        /*tp_doc*/
    (traverseproc)Simple_traverse, 	/*tp_traverse*/
    0,					/*tp_clear*/
    0,					/*tp_richcompare*/
    0,					/*tp_weaklistoffset*/
    0,					/*tp_iter*/
    0,					/*tp_iternext*/
    0,					/*tp_methods*/
    0,					/*tp_members*/
    0,					/*tp_getset*/
    0,					/*tp_base*/
    0,				        /*tp_dict*/
    0,                                  /*tp_descr_get*/
    0,                                  /*tp_descr_set*/
    0,				        /*tp_dictoffset*/
    (initproc)Simple_init,		/*tp_init*/
    0,                                  /*tp_alloc*/
    Simple_new,		        	/*tp_new*/

    0 /*...the rest...*/
};


static PyObject *
Simple_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
{
    SimpleObject *self = (SimpleObject *)type->tp_alloc(type, 0);
    return (PyObject*)self;
}

static int
Simple_init(SimpleObject *self, PyObject *args, PyObject *kwds)
{
    return 0;
}

/* cyclic gc */
static int
Simple_traverse (SimpleObject *self, visitproc visit, void *arg)
{
    fprintf(stderr,"Simple_traverse...\n");
    return 0;
}

static int
Simple_clear(SimpleObject *self)
{
    fprintf(stderr,"Simple_clear...\n");
    return 0;
}

static void
Simple_dealloc(SimpleObject *self)
{
    fprintf(stderr,"Simple_dealloc %p\n", self);
    self->ob_type->tp_free((PyObject*)self); /* <= segfault here */
    return;
}



static PyMethodDef simple_methods[] = {
    {0}				/* sentinel */
};



void
initsimple(void)
{
    if (PyType_Ready(&simple_SimpleType) < 0) return;
    Py_INCREF(&simple_SimpleType);

    PyObject* m = Py_InitModule3("simple", simple_methods, "Simple module.");
    PyModule_AddObject(m,"Simple",(PyObject*)&simple_SimpleType);
}


A script sufficient to provoke the fault is this:

import simple
simple.Simple()


Can anyone explain what I'm doing wrong?  Or perhaps suggest a better
solution to my "real" problem, if I'm approaching the problem completely
wrong :-)

Yours,
	/mailund



From myfirstname at mylastname.com  Sat Jan  3 20:19:43 2004
From: myfirstname at mylastname.com (Dan Bullok)
Date: Sun, 04 Jan 2004 01:19:43 GMT
Subject: Parametrized inheritance
Message-ID: <PSJJb.214440$8y1.768918@attbi_s52>

I have a couple of classes:
????class?Base:
????????...

????class?Sub(Base):
????????...


I want to subclass Base and Sub, i.e. define classes:
????class?MyBase(Base):
????????...

????class?MySub(Sub):
????????...?

The inheritance looks like this: 
????Base->MyBase
????????->Sub->MySub

But I'd really like it to look like this:
????Base->MyBase->Sub->MySub

i.e. define Sub as "class Sub(X)", where I can change X at the time of
instantiation.??Then?I?could?define?MySub?as?"class?MySub(Sub(MyBase))".
(I hope that it's obvious that I'm looking for this effect, not this syntax)


Of course, someone is going to ask "why?"

I need to override a few members in Base.??Sub?is?mostly?fine?as-is,?so?if?I
could have MySub=Sub(MyMBase), that would be fine.


From amy-g-art at cox.net  Fri Jan  9 19:37:24 2004
From: amy-g-art at cox.net (Amy G)
Date: Fri, 9 Jan 2004 16:37:24 -0800
Subject: Using .seek(0) to read.
Message-ID: <5PHLb.63142$BQ5.4900@fed1read03>

"Peter Otten" <__peter__ at web.de> wrote in message
news:btjbot$f56$00$1 at news.t-online.com...

> You can open the file in "r+" mode and then f_vm.seek(0) before writing.
> However, from the above example I can not see why you even bother to check
> the old contents and don't just write the new data.
>
> Peter

I got this respnse on a prior post.  Peter was correct about not needing to
compare the old contents, and I was able to easily fix my code by taking out
any read.

However, now I need to open the file in "r+" mode and do a
<filename>.seek(0) on it.  I am opening up the .procmailrc file for each
user in a database that has a "save_junkmail" == 1 and inserting some lines.
They need to be inserted in the correct spot and each user has a different
number of lines in their .procmailrc.  Everything prints out correctly.  I
now want to write the lines instead of printing to stdout.  If I set up the
open() statement to say:

procmailrc_file = open("/home/%s/.procmailrc" %userid, 'r+')

How do I then get the values with .seek(0)?  Is it simply

file_in_list = procmailrc_file.seek(0)    ....?

Is there a better way to do this?

*********************CODE
SNIPPET****************************************************
c.execute("""SELECT save_junkmail, userid from users where save_junkmail =
'1'""")
d = c.fetchall()
if (hasElements(d) == 1):
    for save_junkmail, userid in d:
        #IS JUNKMAIL OFF - IF IT IS TURN IT ON.  ELSE DO NOTHING
        junkmail_off = os.popen("/bin/ls /home/%s/ | grep spam$" %userid)
        if (junkmail_off):
            junk_off = stripLs(junkmail_off.readlines())
            #os.system("/bin/mv /home/%s/%s /home/%s/mail" %(userid, item,
userid))
            procmailrc_file = open("/home/%s/.procmailrc" %userid, 'r')
            procmailrc = stripLs(procmailrc_file.readlines())
            x = procmailrc.index("| /usr/local/bin/spamc")
            procmailrc.insert((x+2), ":0:\n* ^X-Spam-Status:
Yes\n$HOME/probably-spam\n")
            procmailrc.insert((x+2), ":0:\n* ^X-Spam-Level:
\*\*\*\*\*\*\*\*\*\*\*\*\*\n$HOME/almost-certainly-spam\n")
            for line in procmailrc:
                print line
****************************************************************************
***********

Thanks for your help.




From http  Mon Jan 12 20:10:37 2004
From: http (Paul Rubin)
Date: 12 Jan 2004 17:10:37 -0800
Subject: C++ bad-mouthing (was: Why learn Python ??)
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<7xisjh1e3i.fsf@ruckus.brouhaha.com>
	<10064loqc7sd7e3@corp.supernews.com>
	<7xeku496wx.fsf@ruckus.brouhaha.com>
	<donn-9D2291.16343412012004@nntp6.u.washington.edu>
Message-ID: <7xhdz08xgy.fsf@ruckus.brouhaha.com>

Donn Cave <donn at u.washington.edu> writes:
> I don't know if we're on very solid ground from which to laugh at
> C++, though.  Python has the advantage of a clean start, but from a
> software engineering standpoint it really seems like a hacker
> language.  Full of neat tricks that work like magic, but does it
> really even attempt to offer anything in the area you're talking about?

It makes some feeble ones but is somewhat hobbled by its origins as a
scripting or "glue" language.  Also, Python is really still in its
infancy.  Maybe after PyPy is completed, someone can try writing a
serious compiler for it, and the issues brought out by writing the
compiler can drive the design of a successor language, Python II or
whatever.

The one attempt I know of to write a substantial Python application
competitive with similar applications written in C was the Grail web
browser, and AFAIK that was a complete failure.  However, for small to
medium sized projects which don't have to run fast, Python is great.


From usenet_spam at janc.invalid  Wed Jan 14 20:43:39 2004
From: usenet_spam at janc.invalid (JanC)
Date: Thu, 15 Jan 2004 01:43:39 GMT
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
	<pan.2004.01.14.01.17.00.970198@fakeemail.com>
	<bu2ana$bmpci$1@ID-207230.news.uni-berlin.de>
Message-ID: <Xns94711BBF5F7D6JanC@213.119.4.35>

"Brandon J. Van Every" <try_vanevery_at_mycompanyname at yahoo.com> schreef:

> I am not sure how I feel about it.  I think it only bothers me when
> they claim to be cross-platform in theory, and the Windows build
> simply does not work in practice.  A working Windows build should be
> easy to obtain all the dependencies for, and it should just build. 
> When it doesn't do that, when you have to chase all over Hell's green
> acre to find the libraries, and then the build simply coughs and gags
> and dies, I'm not even slightly amused at how "cross-platform" some
> Linuxer is claiming things to be. 

You think "cross-platform" means "it runs out-of-the-box on all possible 
platforms that ever existed, now exist, and will ever exist"?

Please go searching and come back when you find 1 (one) program which fits 
that definition...  :-p

-- 
JanC

"Be strict when sending and tolerant when receiving."
RFC 1958 - Architectural Principles of the Internet - section 3.9


From danb_83 at yahoo.com  Sun Jan 18 17:51:33 2004
From: danb_83 at yahoo.com (Dan Bishop)
Date: 18 Jan 2004 14:51:33 -0800
Subject: Printing variable names
References: <a6d1df44.0401181122.56f1f091@posting.google.com>
	<mailman.479.1074455535.12720.python-list@python.org>
Message-ID: <ad052e5c.0401181451.6c25fdf4@posting.google.com>

Mark McEahern <mark at mceahern.com> wrote in message news:<mailman.479.1074455535.12720.python-list at python.org>...
> Mike wrote:
> 
> >mylist = [a, b, c]
> >
> >I want to print out the names of the variables in mylist (not the
> >values of a, b, and c).  How do I go about doing this.  Thanks.
> 
> There's no simple answer to this.  Consider the fact that you can have 
> more than one name bound to any given mutable instance.

Why did you specify "mutable"?  The same applies to immutable
instances.

> I'm curious what problem you're trying to solve.

So am I.  The question shows up here all the time, but I've never seen
a reason for it.


From tjreedy at udel.edu  Mon Jan 19 18:44:26 2004
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 19 Jan 2004 18:44:26 -0500
Subject: New to Python: my impression v. Perl/Ruby
References: <mailman.493.1074484056.12720.python-list@python.org><87ad4kxees.fsf@pobox.com>
	<mailman.524.1074550958.12720.python-list@python.org>
Message-ID: <0aqdnVcPUPNM9pHdRVn-jw@comcast.com>


"Wayne Folta" <wfolta at netmail.to> wrote in message
news:mailman.524.1074550958.12720.python-list at python.org...
> For me, it's just totally natural that I'd say, "The POP3 package is
> built using the socket package and socket exceptions are not caught by
> POP3." That single sentence immediately tells me everything I needed to
> know.

If you consider it a doc bug or deficiency, go to sourceforge, register if
you have not, go to
http://sourceforge.net/tracker/?group_id=5470&atid=105470
and file a doc bug.  Give a specific suggestion like the above, giving the
LibRef section number and paragraph and sentence number where you would put
it.  Also give rationale (which I snipped) explaining how as newcomer you
were unnecessarily puzzled, mislead, or whatever.  If one of doc
maintainers agree, as they have with most of my suggestions, they will add
to the LaTex master copy.  (Patches to LaTex source are also accepted, for
those who can make such.)  This is how docs keep getting better.

> No trolling intended.

I never thought so.  You have obviously looked pretty carefully at all
three languages, given them a fair if personal evaluation -- and come to
the 'right' conclusion ;-).

Terry J. Reedy




From theller at python.net  Mon Jan 26 04:43:17 2004
From: theller at python.net (Thomas Heller)
Date: Mon, 26 Jan 2004 10:43:17 +0100
Subject: -- Pythonic control of Windows GUI application: tabs and
 listviews
References: <4b3b1124.0401251706.6cf67f27@posting.google.com>
Message-ID: <1xpnrqoa.fsf@python.net>

zapazap at yahoo.com (zapazap) writes:

> -- Pythonic control of Windows GUI application: tabs and listviews
>
> Dear Snake-charming Gurus,
>
> I have learned to manipulate some controls ("Button", "ComboBox", etc)
> through such means as:
>
>     win32gui.SendMessage(hwnd, win32con.BM_GETCHECK, 0 ,0)
>     win32gui.SendMessage(hwnd, win32con.CB_GETCOUNT, 0 ,0)
>
> provided by Python Win32 Extensions, and understand that such
> constants as:
>
>     win32con.BM_GETCHECK
>     win32con.CB_GETCOUNT
>
> corresponding to distinct messages (documented at [1] and [2]) that
> can be sent to such controls.
>
> For the "List-View" and "Tab" controls then, I expected to find the
> constants
>
>     win32con.LVM_GETCHECK       
>     win32con.TCM_GETITEMCOUNT   
>
> corresponding to the distinct messages documented at [3] and [4]. 
> Unfortunately the module win32com module does not have any LVM_* or
> TCM_* attributes, and I have not found reference to such constants in
> the Extensions documentation.

These constants are defined in the 'commctrl' module:

Python 2.3.3 (#51, Dec 18 2003, 20:22:39) [MSC v.1200 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import commctrl
>>> commctrl
<module 'commctrl' from 'C:\Python23\lib\site-packages\win32\lib\commctrl.pyc'>
>>> commctrl.LVM_GETITEMCOUNT
4100
>>> commctrl.TCM_GETITEMCOUNT
4868

Thomas


From dave at pythonapocrypha.com  Fri Jan  9 17:40:23 2004
From: dave at pythonapocrypha.com (Dave Brueck)
Date: Fri, 9 Jan 2004 15:40:23 -0700
Subject: Python is far from a top performer according to benchmarktest...
References: <ryELb.238$tK2.228@amstwist00>
	<3fff234a$0$129$e4fe514c@dreader3.news.xs4all.nl>
Message-ID: <025601c3d701$91f5a580$6401fea9@YODA>

Iwan:
> > The greatest advantage of Python is the great increase in productivity and
> > the generation of a much smaller number of bugs due to the very clean and
> > compact structure Python invites you to produce.
>
> So dogma dictates. And I've found it to be true on many occasions, if
> not all. BUT, the famed Python Productivity Gain is very difficult to
> quantify. And for me that's a BIG but.  I'm trying to push Python within
> my company. Nicely presented "performance benchmarks" go down well with
> management, bevause those are quantities which are supposedly
> understood.

Understood, perhaps, but very often irrelevent. That being the case, using
performance benchmarks to argue your case is a weak approach.

If you're talking to management, talk to them about something they care about,
like money. For most programs it's hard to translate performance improvements
into money: e.g. it's hard to assert that by doubling the speed of your
spell-checker implementation that sales will increase. There of course are
exceptions, but even then there's no guarantee that management would still
prefer performance above other factors if given a choice.

It's much more powerful to speak about reduced time to market, for example. Or
the ability to compete against companies with legions of programmers. Or the
decreased time it takes to turn ideas into implemented features (especially
when it's your competitor that came up with the idea). Or a lower cost of
changing directions technologically. Etc.

-Dave




From me at privacy.net  Sat Jan 10 07:14:35 2004
From: me at privacy.net (Duncan Booth)
Date: 10 Jan 2004 12:14:35 GMT
Subject: Variable Scope 2 -- Thanks for 1.
References: <dcde6f.0401091247.c17b76e@posting.google.com>
	<3fff16b6$0$315$e4fe514c@news.xs4all.nl>
	<btn6ks$ada$1@fred.mathworks.com>
Message-ID: <Xns946C7C117B5C4duncanrcpcouk@127.0.0.1>

JCM <joshway_without_spam at myway.com> wrote in
news:btn6ks$ada$1 at fred.mathworks.com: 

> Irmen de Jong <irmen at -nospam-removethis-xs4all.nl> wrote:
> ...
>> A very important concept with Python is that you don't have variable 
>> assignment, but name binding. An "assignment statement" binds a name
>> on an object, and the object can be of any type. A statement like
>> this: 
> 
>> age = 29
> 
>> doesn't assign the value 29 to the variable age. Rather, it labels
>> the integer object 29 with the name age.
> 
> I think this statement is misleading--it seems to imply the integer
> object is altered somehow.  Personally I see no problem with saying
> the value 29 is assigned to the variable age, so long as you
> understand the semantics.
> 

Be careful. The integer object is actually altered, at least in so far as 
its reference count (which is part of the object) is changed:

>>> import sys
>>> sys.getrefcount(29)
11
>>> age = 29
>>> sys.getrefcount(29)
12
>>> 

-- 
Duncan Booth                      duncan.booth at suttoncourtenay.org.uk
int month(char *p){return(124864/((p[0]+p[1]-p[2]&0x1f)+1)%12)["\5\x8\3"
"\6\7\xb\1\x9\xa\2\0\4"];} // Who said my code was obscure?


From llothar at web.de  Sat Jan 10 00:29:56 2004
From: llothar at web.de (Lothar Scholz)
Date: 9 Jan 2004 21:29:56 -0800
Subject: Python is far from a top performer according to benchmark
	test...
References: <ryELb.238$tK2.228@amstwist00> <btn5db$2f8$1@absinth.dialog.net.pl>
	<pan.2004.01.09.21.35.40.132608@yahoo.com>
Message-ID: <6ee58e07.0401092129.302cb9d4@posting.google.com>

Samuel Walters <swalters_usenet at yahoo.com> wrote in message news:<pan.2004.01.09.21.35.40.132608 at yahoo.com>...

> For numerical processing, C is the right tool,

Definitely not, you don't want a pointer language when using numerical
processing: use Fortran.


From mark at mceahern.com  Sat Jan  3 18:48:29 2004
From: mark at mceahern.com (Mark McEahern)
Date: Sat, 03 Jan 2004 17:48:29 -0600
Subject: datetime string to datetime object converter
In-Reply-To: <MnIJb.33778$xU1.16252@fe1.texas.rr.com>
References: <MnIJb.33778$xU1.16252@fe1.texas.rr.com>
Message-ID: <1073173709.12941.5.camel@dev.internal>

On Sat, 2004-01-03 at 17:38, Randall Smith wrote:
> Is there an existing module or script that can convert a datetime string 
> of unknown format to a python datetime object ?

Search for "egenix mx.DateTime"

It's amazing.

// m




From newsgroups at jhrothjr.com  Wed Jan 28 11:10:48 2004
From: newsgroups at jhrothjr.com (John Roth)
Date: Wed, 28 Jan 2004 11:10:48 -0500
Subject: isinstance() bug
References: <20040128132225.GA10842@foof.i3.cz><16407.54576.283608.505067@montanaro.dyndns.org>
	<mailman.925.1075304492.12720.python-list@python.org>
Message-ID: <101fnrgg9dks4dd@news.supernews.com>

"Michal Vitecek" <fuf at mageo.cz> wrote in message
news:mailman.925.1075304492.12720.python-list at python.org...
> Skip Montanaro wrote:
> >You imported the module twice (look at sys.modules) so you have two
> >different A classes.  I believe isinstance() uses the __class__ attribute
> >and the class's __bases__ attribute to work its way up the class chain
> >looking for a match.  Even though they are defined identically, you have
two
> >different A classes.  An instance of one can't also be an instance of the
> >other.
>
>  i think that if absolute path was somehow put into the classes internal
>  information this inconsistency would be put away.
>
>  it's my belief that if i'm instantiating a class from the same location
>  no matter how i imported its definition, its instances are always of
>  the same class.
>
>  and as to the sys.modules thing: this could be considered as just two
>  references to the same module (again its absolute path would be taken
>  into account), not two different modules.
>
>  does it make sense?

It depends on the operating system. I think it's quite possible to
resolve the absolute path on, for example, Windows, while it's
not possible in the general case on, for example, Unix. If you have
two different paths hard linked to the same file, which one is the
"correct" path? It gets even worse if you're accessing the file from
a file server where you may not have the least idea what the aliasing
policies are.

The best advice I have is the same advice I give to anyone
who burns themselves doing something that doesn't work quite
the way they expect: don't do that. Imports need to be considered
thoughtfully.

John Roth
>
> -- 
> fuf (fuf at mageo.cz)
>




From cphsu at zen.com.tw  Mon Jan  5 04:26:54 2004
From: cphsu at zen.com.tw (Kent Hsu (Hsu, Chih-Peng))
Date: Mon, 5 Jan 2004 17:26:54 +0800
Subject: codecs packages?
References: <ef08387c.0401041215.453fd308@posting.google.com>
	<bt9t5m$q7t$07$1@news.t-online.com>
Message-ID: <btbarb$ikb$1@news.seed.net.tw>

How about to try with 'mbcs' codec?

Martin v. L?wis <martin at v.loewis.de> wrote in message
news:bt9t5m$q7t$07$1 at news.t-online.com...
> Fortepianissimo wrote:
> > I'd like to decode some email headers into unicode, including some
> > Asian DBCS. I've searched several places and they pointed to the
> > Python Codecs project @ SF
> > (http://sourceforge.net/projects/python-codecs/), but I couldn't find
> > anything there. Could someone give me a pointer to any related
> > library?
>
> I recommend to use the cjkcodecs package, at
>
> http://cjkpython.i18n.org/#CJKCodecs
>
> (atleast, it ought to be there - cjkcodecs appears to change
> its home page with each release).
>
> Regards,
> Martin
>




From pgmoscatt at optushome.com.au  Fri Jan 23 19:31:26 2004
From: pgmoscatt at optushome.com.au (Peter Moscatt)
Date: Sat, 24 Jan 2004 10:31:26 +1000
Subject: Python & Databases ?
Message-ID: <4011bcd6$0$4051$afc38c87@news.optusnet.com.au>

Will Python work with any of the databases like MySQL... ?

Pete


From fse12 at cse.usc.edu  Wed Jan 21 13:21:13 2004
From: fse12 at cse.usc.edu (ACM SIGSOFT 2004 Publicity Chair)
Date: 21 Jan 2004 10:21:13 -0800
Subject: CFP: ACM SIGSOFT 2004/12th Symposium on Foundations of Software
	Engineering
Message-ID: <1b1ef86d.0401211021.42d21b27@posting.google.com>

CALL FOR PAPERS AND WORKSHOPS

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

                                ACM SIGSOFT 2004

    12th International Symposium on the Foundations of Software Engineering

===============================================================================

                         October 31 - November 6, 2004

                Hyatt Newporter, Newport Beach, California, USA

                         http://www.isr.uci.edu/FSE-12

                            Sponsored by ACM SIGSOFT
                        In cooperation with ACM SIGPLAN

===============================================================================

                                Call for Papers
                                ---------------

ACM SIGSOFT 2004 brings together researchers and practitioners from academia
and industry to exchange new results related to both traditional and emerging
fields of software engineering. We invite submission of technical papers which
report results of theoretical, empirical, and experimental work, as well as
experience with technology transition.

Topics of Interest

We encourage submissions in any field of software engineering, including, but
not limited to:

* Component-Based Software Engineering
* Distributed, Web-Based, and Internet-Scale Software Engineering
* Empirical Studies of Software Tools and Methods
* Feature Interaction and Crosscutting Concerns
* Generic Programming and Software Reuse
* Requirements Engineering
* Software Analysis and Model Checking
* Software Architectures
* Software Configuration Management
* Software Engineering and Security
* Software Engineering Tools and Environments
* Software Information Management
* Software Metrics
* Software Performance Engineering
* Software Process and Workflow
* Software Reengineering
* Software Reliability Engineering
* Software Safety
* Software Testing
* Specification and Verification
* User Interfaces

Submission Guidelines

Paper submissions will be made electronically via the Web, at the conference
web site. Both an abstract and the full paper must be submitted by their 
respective submission deadlines. Papers must not exceed ten (10) 8.5"x11" 
single spaced pages using the ACM SIG proceedings formatting instructions, 
which are accessible from the conference web site. Accepted papers must be 
accompanied by a signed ACM copyright release form.

Paper submissions will be reviewed by the program committee for originality,
significance, soundness, and quality of presentation. Papers must clearly
present an original contribution to the state-of-the-art. Experience papers are
welcome, but they must clearly present general lessons learned that would be of
interest and benefit to a broad audience of both researchers and practitioners.

Papers must describe work that has not been submitted to or presented at
another forum. Any double submissions will be rejected without review, and the
other forum will be informed of the situation.

Important Dates (all in 2004)

March 24 --- Abstract submission due
March 29 --- Technical paper submissions due
June 4   --- Author notification
August 15 -- Camera ready due

General Chair
-------------
Richard N. Taylor, University of California, Irvine, USA; taylor at uci.edu

Program Chair
-------------
Matthew B. Dwyer, Kansas State University, USA; dwyer at csi.ksu.edu

Program Committee
-----------------
Ken Anderson, University of Colorado, Boulder, USA
Annie Ant?n, North Carolina State University, USA
Joanne Atlee, University of Waterloo, Canada
Prem Devanbu, University of California, Davis, USA
Mary Jean Harrold, Georgia Institute of Technology, USA
John Hatcliff, Kansas State University, USA
Jim Herbsleb, Carnegie Mellon University, USA
Andr? van der Hoek, University of California, Irvine, USA
Paola Inverardi, University of L'Aquila, Italy
Gregor Kiczales, University of British Columbia, Canada
Jeff Kramer, Imperial College London, UK
Shriram Krishnamurthi, Brown University, USA
Shinji Kusumoto, Osaka University, Japan
Axel van Lamsweerde, Universit? Catholique de Louvain, Belgium
Bashar Nuseibeh, The Open University, UK
Mauro Pezz?, Universita' di Milano-Bicocca, Italy
Gian Pietro Picco, Politecnico di Milano, Italy
David Rosenblum, University College London, UK
Gregg Rothermel, Oregon State University, USA
Wilhelm Sch?fer, Universit?t Paderborn, Germany
Douglas C. Schmidt, Vanderbilt University, USA
Peri Tarr, IBM T.J. Watson, USA
Frank Tip, IBM T.J. Watson, USA
Willem C. Visser, NASA Ames Research Center, USA

                               Call for Workshops
                               ------------------

Workshops hosted by SIGSOFT 2004 should provide an opportunity for exchanging 
views, advancing ideas, and discussing preliminary results on topics related to 
software engineering research and applications. Workshops should not be seen as 
an alternative forum for presenting full research papers. Workshops hosted by 
SIGSOFT 2004 will last one or two days.

Important Dates (all in 2004)

April 15 --- Workshop proposals due
Oct 31-Nov 1, 5-6 --- Workshops

Workshop Chair
--------------
Harald Gall, Technical University, Vienna, Austria, gall at infosys.tuwien.ac.at

Publicity Chair
---------------
Nikunj R. Mehta, University of Southern California, mehta at cse.usc.edu


From rp at win.tue.nl  Thu Jan  8 08:18:00 2004
From: rp at win.tue.nl (Reinier Post)
Date: Thu, 8 Jan 2004 13:18:00 +0000 (UTC)
Subject: Text-to-HTML processing program
References: <slrnbvcm32.122.philh@cabalamat.cabalamat.org>
Message-ID: <btjla8$oeq$1@news.tue.nl>

phil hunt wrote:

>Does anyone know of a text-to-HTML processing program, ideally
>written in Python because I'll probably be wanting to make small
>modifications to it, which is simple and straightforward to use
>and which uses a simple markup language (something like Wikipedia
>markup would be ideal)?

Last time I looked for it, I Googled for

  txt2html

and found a program of that name based on

  txt2tex

I haven't used them heavily.

There are other "plaintext with conventions" text formats out there,
but I can't find my pointers to them.

-- 
Reinier


From antonmuhin at rambler.ru  Fri Jan  9 13:24:56 2004
From: antonmuhin at rambler.ru (anton muhin)
Date: Fri, 09 Jan 2004 21:24:56 +0300
Subject: Name of the function
In-Reply-To: <9e5ea2c4.0401081103.6fa93bf9@posting.google.com>
References: <9e5ea2c4.0401080640.64ef5d58@posting.google.com>
	<btjuct$84v33$1@ID-217427.news.uni-berlin.de>
	<9e5ea2c4.0401081103.6fa93bf9@posting.google.com>
Message-ID: <btmrq1$95lbb$1@ID-217427.news.uni-berlin.de>

Olaf Meding wrote:
> Is there a way to do this w/o importing another module?
> 
> Yes this is what I was looking for except the code below requires
> importing module inspect.
I'm afraid that there is no way, at least none I'm aware of (except for 
Terry Reed suggestion, but I think it's not what you are looking for).

Why you don't want to import a module?

regards,
anton.


From brian at sweetapp.com  Sat Jan 24 03:31:11 2004
From: brian at sweetapp.com (Brian Quinlan)
Date: Sat, 24 Jan 2004 00:31:11 -0800
Subject: [OPINION] - does language really matter if they all dothe
	samething?
In-Reply-To: <58587302-4E30-11D8-8FAB-0003934ACDEC@zdome.net>
Message-ID: <005e01c3e254$6c74a5a0$0000fea9@dell8200>

> I agree that functions are objects in Python.  However, not everything
> in Python is an object.  For example, names are not objects.  In the
> above example, "foo.bar()", neither "foo" nor "bar" are objects, but
> they are references to objects.  In some languages, such as C and Lisp,
> references to objects can be directly manipulated (Lisp has symbols, C
> has pointers).

I'm having problems figuring out your follow-up. Your original point was:

 "It's [Python] build from a procedural standpoint, in an environment where
  most things are objects and some are functions."

I disagreed with the contrast between functions and objects. Now you seem to
be making the totally different point that names are not objects in Python.
Following along:

1. I can't see how your mention of C pointers is relevant at all
2. I don't see what is so special about Lisp symbols versus Python names
   i.e. what functionality are you missing?

[snipped]
> If you think this example is contrived, maybe you haven't worked with
> the paradigms used in Objective-C very much.  The example above was
> used dozens of times in a class that I wrote in Objective-C which draws
> a grid to the screen, for example, when it asks itself or its delegate
> what color the grid should be, or the maximum scale allowed.  The
> practice is also used heavily by Apple's Cocoa libraries, which are my
> favorite UI libraries of all time to program with.

The cost in writing a function to check for the availability of a method on
your target object is a one-time thing (which you just did), so it doesn't
seem like a big deal to me.

- (void)resetToDefaultSettings
{
   if ([delegate respondsToSelector:@selector(defaultSettingsFor:)])
     [self setSettings:[delegate defaultSettingsFor:self]];
   else
     [self setSettings:someFallbackValue];
}

In Python you'd write it as:

def resetToDefaultSettings():
   if self.delegate().respondsToSelector_('defaultSettingsFor:'):
       self.setSettings(delegate().defaultSettingsFor_(self))
   else:
       self.setSettings(someFallbackValue)

I don't really like the syntax that much but I guess the guys writing the
Python Objective-C bindings thought it was ok.

Cheers,
Brian




From elainejackson7355 at home.com  Thu Jan  8 19:10:01 2004
From: elainejackson7355 at home.com (Elaine Jackson)
Date: Fri, 09 Jan 2004 00:10:01 GMT
Subject: books
References: <3FFDC029.AB0A4097@unet.univie.ac.at>
Message-ID: <tjmLb.28534$JQ1.8428@pd7tw1no>

I haven't read either of these myself, but I've heard good things. The titles
are "thinking in python" and "dive into python". Both are available on the net
in pdf form.

"Thomas Mang" <a9804814 at unet.univie.ac.at> wrote in message
news:3FFDC029.AB0A4097 at unet.univie.ac.at...
| Hello,
|
| I have programmed mostly in C++ lately, and I want to start learning
| Python now.
|
| Which books would you recommend to buy?
|
| I am both looking for an introduction into the language, as well as
| complete guides.
|
|
|
| thanks for your responses,
|
| Thomas
|




From __peter__ at web.de  Sun Jan  4 15:36:55 2004
From: __peter__ at web.de (Peter Otten)
Date: Sun, 04 Jan 2004 21:36:55 +0100
Subject: Launching pdb from within a script
References: <UNYJb.14065$Od5.5161@news-binary.blueyonder.co.uk>
	<bt9mhl$9k2$06$1@news.t-online.com>
	<MHZJb.14962$Od5.2841@news-binary.blueyonder.co.uk>
	<bOZJb.15107$Od5.11731@news-binary.blueyonder.co.uk>
Message-ID: <bt9t94$q60$07$1@news.t-online.com>

Graham Nicholls wrote:

> I'm sure I was able to print the value of variables like this:
> 
>  except :
>         pdb.set_trace()
[...]
> But pdb complains that there are no such variables.  It may be that I had
> to add some incantation around the script startup - I just can't remember
> (and its frustrating!).

<debugger.py>
import pdb
abc = 1
try:
    print "before"
    1/0
except:
    pdb.set_trace()
print "after"
</debugger.py>

Now run it:

before
--Return--
> /(suppressed)/python2.3/pdb.py(992)set_trace()->None
-> Pdb().set_trace()
(Pdb) abc
*** NameError: name 'abc' is not defined
(Pdb) u
> /(suppressed)/debugger.py(7)?()
-> pdb.set_trace()
(Pdb) abc
1
(Pdb)

If the above sample session doesn't help, you could actually read the pdb
documentation - or do something new and dangerous: search google groups
for, say, Nicholls and set_trace :-)

Peter


From michael at telcopartners.com  Tue Jan 20 13:49:35 2004
From: michael at telcopartners.com (Michael Spencer)
Date: Tue, 20 Jan 2004 10:49:35 -0800
Subject: simple class question
References: <bujorn$u9g$1@ucsnew1.ncl.ac.uk>
	<bujsd7$iot2m$1@ID-217427.news.uni-berlin.de>
Message-ID: <N-WdndlXDd_d5ZDdRVn-vg@comcast.com>

"anton muhin" <antonmuhin at rambler.ru> wrote in message
news:bujsd7$iot2m$1 at ID-217427.news.uni-berlin.de...
> C GIllespie wrote:
> > Dear all,
> >
> > I'm new to both python and OOP, so could I ask a simple question.
> >
> > I have class:
> >
> > class species:
> >     __init__(self,pop=0):
> >         self.pop=pop
> >
> > Now I want to do something like this:
> >
> > X=species(pop=10)
> > Y=species(pop=X.pop)
> > OK, but now I want to update X.pop and have that mirrored in Y.pop, i.e.
if
> > X.pop=5, Y.pop now equals 5.
> >
> > What is the best/nicest/simplest way of doing this?
> >
> > Many thanks
> >
> > Colin
> >
> >
>
> In some cases pop should be class attribute.
>
> regards,
> anton.
Example using class attribute:

>>> class species(object):
...  pop = [0] #Must be mutable object
...  def __init__(self, pop = 0):
...   self.pop[0] = pop
...
>>> x = species(10)
>>> x.pop
[10]
>>> y = species(5)
>>> y.pop
[5]
>>> x.pop
[5]
>>>





From jikosan at myrealbox.com  Sun Jan 11 04:49:41 2004
From: jikosan at myrealbox.com (Jikosan)
Date: Sun, 11 Jan 2004 09:49:41 GMT
Subject: Help with if statement
References: <d91f466b.0401102201.3709771@posting.google.com>
Message-ID: <V_8Mb.56251$C87.20259@twister.socal.rr.com>

I got it working. I had originally misread the prompt.

Here's the code I finally got working. It calculates PI using the Monte
Carlo method.
I have to graph log N vs log PI, which explains the last few lines of the
program.

Gene

#HW1 - 1.5.2
#This code was written in the Python programming language.

import random   #Loads the random number generator library.
import math     #Loads the math library.

file=open('output.txt', 'w')    #Identifies output file.
a, b = -1.0, 1.0                #Sets the boundary conditions for (x,y).
for N in range(0, 100000, 25):  #4000 trials, 1<= N <= 100000 at steps of
25.
    if N == 0:
        N = 1
    onecheck = 0
    for n in range(0,N):        #This for loop generates (x,y) sets N times.
        xrand = random.random()
        yrand = random.random()
        x = a * (1.0-(xrand)) + b*(xrand)
        y = a * (1.0-(yrand)) + b*(yrand)
        c = math.sqrt(math.pow(x,2.0) + math.pow(y,2.0))    #Calculates the
distance to origin.
        if c < 1:
            onecheck = onecheck+1
    pi = 4.0*(onecheck*math.pow(N,-1))  #This is to calculate P(N), the
ratio of points whose
                                        #distance is less than 1 to the
total number of trials.
    if pi == 0.0:   #Prevent 'log 0' calculation errors
        pi == 1.0

#Convert pi and N to log10 and write to a file to graph on Excel.
    file.write(str(math.log(N, 10)))
    file.write('    ')
    file.write(str(math.log(pi, 10)))
    file.write('\n')
file.close()




From robinfriedrich at mac.com  Wed Jan 21 16:43:19 2004
From: robinfriedrich at mac.com (Robin Friedrich)
Date: 21 Jan 2004 13:43:19 -0800
Subject: Build with large file support on AIX
Message-ID: <f134a110.0401211343.16fc9583@posting.google.com>

How does one build Python (2.2 in this case) with large file support on AIX?


From not at existing.ru  Fri Jan 16 08:37:41 2004
From: not at existing.ru (bva)
Date: Fri, 16 Jan 2004 14:37:41 +0100
Subject: viewcvs install error on solaris
Message-ID: <4007e92d$0$325$ba620e4c@news.skynet.be>

Hello,

While trying to install viewcvs on a solaris 5.9 machine I get the 
following error message:

Traceback (most recent call last):
   File "./viewcvs-install", line 35, in ?
     import compat
   File "./lib/compat.py", line 20, in ?
     import urllib
   File "/usr/local/lib/python2.2/urllib.py", line 26, in ?
     import socket
   File "/usr/local/lib/python2.2/socket.py", line 41, in ?
     from _socket import *
ImportError: No module named _socket

Python is installed on the machine.  Can anybody tell me what I'm doing 
wrong or what I've forgotten?

TIA



From danb_83 at yahoo.com  Sun Jan 18 18:08:48 2004
From: danb_83 at yahoo.com (Dan Bishop)
Date: 18 Jan 2004 15:08:48 -0800
Subject: re question - finiding matching ()
References: <4f0a9fdb.0401180751.4b66d974@posting.google.com>
	<mailman.475.1074449209.12720.python-list@python.org>
Message-ID: <ad052e5c.0401181508.7264c57b@posting.google.com>

Jeff Epler <jepler at unpythonic.net> wrote in message news:<mailman.475.1074449209.12720.python-list at python.org>...
> Regular Expressions cannot perform the simple task of matching an
> arbitrary number of parentheses.  You could write an expression that
> will work as long as the nesting isn't more than N levels, but the
> expression quickly becomes very painful.
> 
> Instead, you can use some method to split the string into parts: one
> part for "(", one for ")" and one for any other sequence of characters:
...
> Now, start scanning and counting parens, until you get back to 0

That's the way I'd recommend.  However, it doesn't generalize to cases
where there are multiple types of parentheses.  For that situation,
you can use:

LEFT_PARENS =  '([{'
RIGHT_PARENS = ')]}'
PAREN_MATCHES = dict(zip(RIGHT_PARENS, LEFT_PARENS))

def balancedParens(tokens):
   parenStack = []
   for token in tokens:
      if token in LEFT_PARENS:
         parenStack.append(token)
      elif token in RIGHT_PARENS:
         if parenStack:
            correspondingLeftParen = parenStack.pop()
            if PAREN_MATCHES[token] != correspondingLeftParen:
               return False
         else:
            return False
   return True

(There's probably a simpler way, but I can't think of one right now.)


From gordonp1 at yahoo.com  Wed Jan 21 22:27:48 2004
From: gordonp1 at yahoo.com (Peter Gordon)
Date: 21 Jan 2004 19:27:48 -0800
Subject: How to disable dos shell window popup for os.system call
Message-ID: <aa24ae0d.0401211927.7a91786@posting.google.com>

When I try to execute another program, the dos command shell window
pops up with the application. For example:
os.system("notepad") brings up the notepad but I also get the command
shell window. How do I prevent command shell window to open?


From deets_noospaam at web.de  Thu Jan 29 13:11:26 2004
From: deets_noospaam at web.de (Diez B. Roggisch)
Date: Thu, 29 Jan 2004 19:11:26 +0100
Subject: Get number of iteration
References: <bvbbd7$9rv$01$1@news.t-online.com>
	<bvbbmf$q1bkm$1@ID-111250.news.uni-berlin.de>
	<mailman.998.1075398962.12720.python-list@python.org>
Message-ID: <bvbice$n80$02$1@news.t-online.com>

> In recent versions of Python there is an easier way:
> 
>  >>> for index, value in enumerate(["three", "four", "five", "six"]):
> ...    print index, value
> ...
> 0 three
> 1 four
> 2 five
> 3 six

Boy, one never stops learning. I'll better stop answering here and read
only :)

Diez


From snake at penza-gsm.ru  Thu Jan 15 00:40:36 2004
From: snake at penza-gsm.ru (Alexey Nezhdanov)
Date: Thu, 15 Jan 2004 08:40:36 +0300
Subject: Bug or feature?
Message-ID: <bu58st$1ha3$1@news.rtcomm.ru>

Hello. Found a strange python behaivoir while writing some object. I've 
stripped out all other stuff so the problem is stright here:
=================================
#!/usr/bin/python

class Object:
     def __init__(self,val):
         self.val=val

     def Sub(self,delta):
         self.val-=delta
         return delta

c=Object(1)

### case 1 ###
d=c.Sub(1)
c.val+=d
print 'case A:',c.val

### case 2 ###
c.val+=c.Sub(1)
print 'case B:',c.val
=================================
Case 1 and case 2 prints out different calues (1 and 2 respectively).
Do not know - if this is a bug or feature of python.

--
Alexey Nezhdanov



From wweston at att.net  Thu Jan 22 10:39:01 2004
From: wweston at att.net (wes weston)
Date: Thu, 22 Jan 2004 15:39:01 GMT
Subject: Importing database: newbie issue
In-Reply-To: <mailman.635.1074768487.12720.python-list@python.org>
References: <mailman.635.1074768487.12720.python-list@python.org>
Message-ID: <p8SPb.87119$6y6.1751162@bgtnsc05-news.ops.worldnet.att.net>

Angelo,
    If doing this on an ongoing basis, you might
look at using shelve.

from "Python Essential Reference", pg 81

import shelve

object       = someObject()
dbase        = shelve.open(filename) #open a database
dbase['key'] = object                #save object to db
...
object       = dbase['key']          #retrieve object
dbase.close()



Angelo Secchi wrote:
> Hi,
> I have a database with a fixed format structure (i.e. i know the
> starting point and the length of each of the field composing the
> database) and I would like to extract from it only few fields (ex the
> one starting from the 32nd position with length 12...).
> What is the best way to do that?
> 
> Thanks
> a
> 



From pablofran at www.pablofrancisco.com  Sat Jan 31 02:09:20 2004
From: pablofran at www.pablofrancisco.com (pablofran at www.pablofrancisco.com)
Date: 31 Jan 2004 07:09:20 -0000
Subject: (no subject)
In-Reply-To: <20040131070920.37338.qmail@www.1hourhosting.com>
Message-ID: <20040131070920.37359.qmail@www.1hourhosting.com>

Thank you for your email.

I will reply to you

as soon as possible.



Thanks,



Pablo



From its1louder at yahoo.com  Wed Jan 21 12:35:58 2004
From: its1louder at yahoo.com (Tom)
Date: 21 Jan 2004 09:35:58 -0800
Subject: Help, *.CHM, etc
References: <90f2d9db.0401201803.6f2adbf8@posting.google.com>
Message-ID: <90f2d9db.0401210935.428e0a0e@posting.google.com>

Hah, thanks for the prompt help.  I've been using the _programming on
win32_ (Hammond) book as a reference and now I see that right under
spawnve in Appendix A p. 523 (which I was using as my os module
reference) is the bit about system(command).  From C that should have
been obvious.

Trying it, os.system() didn't really work but os.startfile() works
exactly as I'd like it.  fixing my os.system() call is probably is
easy but irrellevant.

As for the other question, a portable html browser that looks & feels
like the chm help browser.  I realized that Boa Constructor Project
has such a component, since I've used Boa help in windows and unix.  I
wonder if anyone has written a cross-platform CHM decoder and browser
that has the help browser look & feel.  I can't find one, but it seems
that python would be a great language to make such a thing.  Maybe
I'll take a crack if it hasn't been done.  I like monolithic,
compressed help vs. a big directory full of html.


From alexander.dejanovski at laposte.net  Wed Jan 14 10:26:32 2004
From: alexander.dejanovski at laposte.net (Alexander DEJANOVSKI)
Date: Wed, 14 Jan 2004 16:26:32 +0100
Subject: JyRetic EAI Server 1.0RC1 released
Message-ID: <5.1.0.14.2.20040114162419.02a38630@127.0.0.1>

Retic goes Jython now, and is thus fully compatible with the Java platform. 
(I won't develop no more on the former Python version of Retic. )
This gives a better connectivity, particularly through JDBC and JMS.
Jython 2.1 is included in the release.

Download on the sourceforge project's site => 
http://sourceforge.net/projects/retic

Available sources are : file, FTP, HTTP, JMS, SOAP, JDBC, XMLBlaster

Available pipes are : Zip, Unzip, Flat-to-XML, XML-to-Flat, XPath, XSLT, 
FOP (to produce PDF or PS from XSL-FO input), Excel (to produce MS Excel 
files from Gnumeric-XML input)

Available sinks are : file, FTP, HTTP, JMS, SOAP, JDBC, XMLBlaster, Jabber 
(open source instant messaging), shell, SMTP, Xindice (Apache's XML database)

Two new kinds of components have appeared in this release :
Preprocessors and Postprocessors : executed only once respectively before 
and after adaptor execution.

Available preprocessors : SQL, Xindice (much more to come)
Available postprocessors : SQL (much more to come)

The logging system is now based on log4j (I've added a Jabber appender 
(IMAppender), thanks to orange-soft.com).

Adaptors can be launched through command-line, XMLRPC calls (retic 
administrator uses it) or JMS queue (the server has to be listening your 
queue).

Retic also has now a scheduler.

I know docs aren't up-to-date but I'll fix that real soon.

=============================================================
WHAT IS RETIC ?

Retic is an EAI Server.
The aim is to permit applications to communicate, even if they
don't speak the same language (which means transport protocols
as well as data structures).
This is done by building adaptors. An adaptor is composed of :
         - One source
         - Several pipes (process data transformations)
         - Several sinks (destination of data)
         - Several loggers (using log4j)
         - Preprocessors (executed only once before adaptor execution - for 
example => drop/create a table through a SQL query)
         - Postprocessors (executed only once after adaptor execution - for 
example => creation of an index on a table through a SQL query)

It is written in Jython and works 100% fine with only Java 1.3+ installed 
on your system (jython 2.1 is embedded in the releases).

=============================================================


I've also released a reworked version of Retic Administrator (1.0) the GUI 
to create adaptors, and control the server.

Yet another piece of software released is reticSOAP, a small tool that 
parses WSDL and permits to :
- test SOAP services
- See the messages exchanged

Both Retic Admin and Retic SOAP come as a win32 release or a wxPython 2.4 
source file release (Python 2.3+ needed).


Enjoy !! 




From jcarlson at uci.edu  Thu Jan 22 12:02:17 2004
From: jcarlson at uci.edu (Josiah Carlson)
Date: Thu, 22 Jan 2004 09:02:17 -0800
Subject: Looking for advice: supporting multiple embedded interpreters
References: <mailman.646.1074782778.12720.python-list@python.org>
Message-ID: <20040122090056.026D.JCARLSON@uci.edu>

> Some background first - we have some software that embeds a Python 
> interpreter into a host application. Scripts are loaded dynamically and 
> used. But we want to support the ability to edit scripts while the app is 
> running. This means we have to "unload" the script and cause a reload. 
> Normal module reloading tricks don't work because if you try to reimport a 
> script that imports another script, and if the nested script is changed, it 
> might not be reloaded itself. Also, we have 2 parts of the software, each 
> using Python for its own set of scripts. We don't want scripts loaded into 
> each parts to "see" scripts loaded into the other part. Ideally, we would 
> like multiple "instances" of a Python interpreter to manage this.
> 
> So, for Python 2.2, I came up with a system that works. When we need a new 
> self-contained Python interpreter, I use Py_NewInterpreter(), swap it in 
> using PyThreadState_Swap, load my built in modules, and swap it back out. 
> When I need to run some code in that interpreter, I swap it back in, load 
> the module I need, call methods in it, and swap it back out. When I'm done 
> with the interpreter, I swap it back in and call Py_EndInterpreter.
> 
> When I want to force a reload of all the script code in a given 
> interpreter, I just delete the interpreter, create a new one, and load the 
> scripts into that one. This has worked flawlessly. And each "part" of my 
> application can use a different interpreter without modules and globals in 
> each one interfering with the other.
> 
> Now, with Python 2.3, this code doesn't seem to work anymore. Someone told 
> me it is likely because of the extensive rewrite of GUSI or whatnot. It is 
> important to note that I'm NOT really doing any threading. I just was 
> self-contained interpreters for the above reasons.
> 
> What I am wondering is if there a reliable method in 2.3 that does what I 
> need?
> 
> It has recently come to my attention that Lutz Paelike is in exactly the 
> same situation I am in, so I don't think this is a fringe concept.

My advice: use the 'reload' builtin to reload your python modules.

 - Josiah



From newsgroups at jhrothjr.com  Fri Jan 23 07:14:10 2004
From: newsgroups at jhrothjr.com (John Roth)
Date: Fri, 23 Jan 2004 07:14:10 -0500
Subject: I support PEP 326
References: <mailman.654.1074788734.12720.python-list@python.org>
	<401081A1.E4C34F00@alcyone.com>
	<qnky8rzid3y.fsf@arbutus.physics.mcmaster.ca>
Message-ID: <10124195f717m35@news.supernews.com>

"David M. Cooke" <cookedm+news at physics.mcmaster.ca> wrote in message
news:qnky8rzid3y.fsf at arbutus.physics.mcmaster.ca...
> At some point, Erik Max Francis <max at alcyone.com> wrote:
> > Gary Robinson wrote:
> >> If there anywhere else I should be expressing my opinion on this, let
> >> me
> >> know.
> >
> > Seems quite reasonable to me.  The only issue I'd take with it is the
> > choice of Min and Max for the names of the singletons; they're a little
> > too close to the functions min and max, which obviously they're both
> > likely to be used with.  I would suggest something a little more verbose
> > such as Minimum and Maximum, or if you want to get silly, Infimum and
> > Supremum.
>
> Or, expressing the idea that they're the ends of a number line:
>
> PosInf, NegInf
> PosInfinity, NegInfinity
> PositiveInfinity, NegativeInfinity
>
> If IEEE floating point was done correctly everywhere, I'd say make
> them the corresponding floating-point constants (Inf+ and Inf-).

If you do that you lose the ability to have those two constants be
in a list that *also* has end delimiters. A large part of the proposal
is that the end delimiters shouldn't have any other meaning: in other
words, there's no rational reason to use them in any other context
than ordering. (People will always come up with irrational reasons,
of course.) [grin]

John Roth
> -- 
> |>|\/|<
>
/--------------------------------------------------------------------------\
> |David M. Cooke
> |cookedm(at)physics(dot)mcmaster(dot)ca




From godoy at ieee.org  Sat Jan 17 21:10:09 2004
From: godoy at ieee.org (Jorge Godoy)
Date: Sun, 18 Jan 2004 00:10:09 -0200
Subject: wxwindows question
References: <mailman.320.1074000727.12720.python-list@python.org>
	<pan.2004.01.13.23.55.15.95014@phreaker.net>
	<pggid1-jb4.ln1@wintermute.g2ctech>
	<pan.2004.01.17.22.31.58.284937@phreaker.net>
Message-ID: <1h6pd1-788.ln1@wintermute.g2ctech>

On Saturday 17 January 2004 20:31 Nuff Said wrote in
<pan.2004.01.17.22.31.58.284937 at phreaker.net>:
 
> I use(d) wxPython 2.4.2.4 with Python 2.3.x on various Linux
> systems (incl. SuSE and Fedora Core).

The same here... But with Conectiva Linux. SuSE is Conectiva's partner
on the United Linux Consortium.
 
> When I compiled wxPython with Unicode support, the demo either
> did not work at all resp. every second or so widget crashed.

I haven't tried using Unicode. My applications still don't need it and
I've seen lots of reports about it not working properly. 

> Without Unicode support, e.g. the StyledTextControl (Scintilla)
> crashed whenever I tried to enter a 'special' character (i.e.
> a character which is not a 7 bit ASCII character). The use of
> other widgets resulted in seg faults, too; but I do not remember
> exactly, which ones.

It doesn't happen here. Since I'm Brazilian I use a lot of chars that
are not 7 bit ASCII (?, ?, ?, ?, ?, etc.) in a lot of places :-) No
crashes due to that, except with an old version of wxGlade on
Windows, where my parter couldn't open / create a file with "special"
chars on titles and notebook tabs: it crashed there. On the other
hand, it worked perfectly on Linux and on the running application, so
after he finished the application, he used my Linux box to add all
the missing stuff (then he learnt about sed & cia. with me). 

> I tried to compile wxPython (resp. wxGTK) for GTK1 and GTK2; the
> former seemed to be more stable (but looked awful).

I agree with you on that one. I haven't insisted much on the GTK2
stuff though. 
 
> After a week or two of testing, I gave up on wxPython (for the
> moment). I wrote a lot of cross platform applications in Python
> (together with C and, recently, C#) using Tkinter (resp. Tcl/Tk)
> and pyGTK (resp. GTK+ for other languages) and never had such
> problems. But both GUI toolkits lack some important widgets and
> therefore I became interested in wxPython (though I don't like the
> way I have to code in wxPython; but that's my personal problem :-)

Could you please say more on the way the other tools are used? I
adapted better with wxPython than Tkinter here... Probably I would
look after Tkinter different today and I would even try it a little
more based on several comments here, but then theres wxPython and it
is solving my problems very nicely.

Which widgets you missed there? 

> Recently, I write a lot of web applications (whenever possible),
> using good old CGIs, various frameworks and ASP.NET (with C#).
> But my dream for Python would be a native GUI toolkit (and not
> just a wrapper for something else which was not designed with
> Python in mind).

It would be very good if wxPython was more python centric instead of
trying to be more like wxWindows. But I guess that people who
prototype in wxPython and then convert some parts (or all) of their
application to C++ wouldn't like such a change... 

There's "equilibrium" here, and messing with that would be
dangerous :-) Another advantage is that wxWindows is already there
and it works. It would be a shame not to benefit from that. 


Since you mentioned CGIs, don't you like using Python for that? 


Be seeing you,
-- 
Godoy.     <godoy at ieee.org>


From irmen at -NOSPAM-REMOVETHIS-xs4all.nl  Tue Jan  6 20:20:29 2004
From: irmen at -NOSPAM-REMOVETHIS-xs4all.nl (Irmen de Jong)
Date: Wed, 07 Jan 2004 02:20:29 +0100
Subject: Getting strange characters in the command prompt
In-Reply-To: <56f42e53.0401061704.523f394@posting.google.com>
References: <56f42e53.0401061704.523f394@posting.google.com>
Message-ID: <3ffb5edc$0$323$e4fe514c@news.xs4all.nl>

sebb wrote:

[...]
> ... and I run it in the windows command prompt, I get strange
> characters I didn't ask for.
> 
> And when I write those non-English characters (? ? ?) directly in the
> command prompt, I get the correct characters.
> 
> Can anyone help we with that problem?

Does executing

   chcp 1252

before running your python program help?
The windows console is not set to code page 1252 by default
as far as I know, but some other windows-specific encoding.

--Irmen


From aahz at pythoncraft.com  Sat Jan 24 01:33:55 2004
From: aahz at pythoncraft.com (Aahz)
Date: 24 Jan 2004 01:33:55 -0500
Subject: [OPINION] - does language really matter if they all do
	the	samething?
References: <69A0D4AB81C51447AD6BA387782B8D64093D8A@midl-mail4.etcconnect.com>
	<028FD9F0-4E01-11D8-BB78-0003934ACDEC@zdome.net>
	<4011C497.1040302@prescod.net>
	<mailman.726.1074923000.12720.python-list@python.org>
Message-ID: <but3kj$6qm$1@panix2.panix.com>

In article <mailman.726.1074923000.12720.python-list at python.org>,
Dietrich Epp  <dietrich at zdome.net> wrote:
>
>Python, second try:
>
>def reset_settings(self):
>     method = None
>     try:
>         method = self.delegate.default_settings
>     except AttributeError:
>         pass
>     if method:
>         self.set_settings(method(self))
>     else:
>         self.set_settings(some_fallback_value)
>
>If you think this example is contrived, maybe you haven't worked with 
>the paradigms used in Objective-C very much.  The example above was 
>used dozens of times in a class that I wrote in Objective-C which draws 
>a grid to the screen, for example, when it asks itself or its delegate 
>what color the grid should be, or the maximum scale allowed.  The 
>practice is also used heavily by Apple's Cocoa libraries, which are my 
>favorite UI libraries of all time to program with.

I'm quite sure it isn't contrived.  OTOH, unlike your Lisp example, this
is one which I think reads more easily than the equivalent Objective-C
code (or your attempt to literally translate it).  I think it's possible
to emulate your Lisp code in Python, but as the joke goes, every language
ends up writing a Lisp emulator.  On the gripping hand, Lisp does
absolutely nothing to demand the clarity with which you wrote your Lisp
code, and I'm not willing to pay the price of reading the occasional (or
frequent! -- depending on the code writer) Perl-like monstrosity for the
privilege of having that elegance readily available.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

A: No.
Q: Is top-posting okay?


From newsgroups at jhrothjr.com  Sat Jan  3 18:34:25 2004
From: newsgroups at jhrothjr.com (John Roth)
Date: Sat, 3 Jan 2004 18:34:25 -0500
Subject: pickling lambdas?
References: <9abf3a27.0401031446.4d73cfb2@posting.google.com>
Message-ID: <vvekdnhlk0mq35@news.supernews.com>


"gong" <gongli at cutey.com> wrote in message
news:9abf3a27.0401031446.4d73cfb2 at posting.google.com...
> hi
>
> i would like to pickle a lambda; according to the library docs in 2.3,
> i believe this shouldnt be possible, since a lambda is not a function
> defined at the top level of  a module (?)
>
> however, upon google searching for "python lambda pickle" i find 2
> posts, one including gvr, which apparently demonstrate that this was
> being attempted and even suggest that it is feasible.  has this become
> available yet, or will it be soon?
>
> thanks
> gong

Why do you want to do this? According to the docs, all that
is saved for a function or a class is the name. Code, data and
so forth is not saved, so it makes no sense to try to pickle
a lambda unless you've bound it to a name at the module
level. See 3.14.4 (Python 2.3.3 Library Reference.)

If you really want to serialize a function's code, look at
the marshal module.

John Roth




From mcfletch at rogers.com  Sun Jan 18 11:10:17 2004
From: mcfletch at rogers.com (Mike C. Fletcher)
Date: Sun, 18 Jan 2004 11:10:17 -0500
Subject: Forums for Teachers Using Python - Where are they?
In-Reply-To: <pan.2004.01.18.11.30.20.988949@yahoo.com>
References: <pan.2004.01.18.11.30.20.988949@yahoo.com>
Message-ID: <400AAFE9.1000005@rogers.com>

Official forum of this type is the Education Special Interest Group 
(sig), or edu-sig.  You can find out more, subscribe and the like here:

    http://mail.python.org/mailman/listinfo/edu-sig

HTH,
Mike

Samuel Walters wrote:

>I'm currently considering a position teaching math and possibly
>programming at a small local magnet school.  If I was also teaching
>programming, I would, of course, be using Python.
>
>So, I went out and googled around for resources.  I found lots of articles
>about using Python to teach programming, but I have yet to turn up one
>forum where teachers using Python talk amongst themselves.
>
>Can anyone point me to such a resource, or, at least any "Must Read"
>articles that I might have missed?
>
>Also, does anyone have any experience using "Thinking Like A Computer
>Scientist" as a textbook?  Does it fit well within a single semester?  If
>not, how far were you able to make it into the book?
>
>Thanks for any advice.
>
>Sam Walters.
>
>P.S.  An thought provoking general interest paper about computers in
>education is here:
>http://www.cs.berkeley.edu/~bh/stop.html
>
>It was written 21 years ago and still raises a relevant question.
>
>  
>

-- 
_______________________________________
  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://members.rogers.com/mcfletch/






From sdeibel at wingide.com  Thu Jan 22 09:34:56 2004
From: sdeibel at wingide.com (Stephan Deibel)
Date: Thu, 22 Jan 2004 09:34:56 -0500 (EST)
Subject: Nokia prefers Python
In-Reply-To: <du7llo0mfkx.fsf@mozart.cc.tut.fi>
Message-ID: <Pine.LNX.4.50.0401220926370.3123-100000@hedgehog>

Anyone happen to have a contact at Nokia that might be willing and able
to write up a Python Success Story based on this?  Or know of someone
else that might?

http://pythonology.org/success

Thanks,

- Stephan




From sholden at holdenweb.com  Tue Jan 13 18:39:56 2004
From: sholden at holdenweb.com (Steve Holden)
Date: Tue, 13 Jan 2004 18:39:56 -0500
Subject: PyCon opportunities
Message-ID: <CGECIJPNNHIFAJKHOLMAIEKGKBAA.sholden@holdenweb.com>

As the final submissions deadline approaches the PSF has taken an
initiative which might help you attend if finance is one of the things
that's been holding you back. Three resolutions passed today are
intended to encourage attendance at PyCon.

I would like to publicize these opportunities as widely as possible to
emphasize that they are available to any eligible applicant.

1. Students at accredited institutions can apply for a "gopher"
position, which grants them free admission to the conference in exchange
for administrative assistance of the conference, under the direction of
the organizing committee.

As conference chair I have to approve such applications. If you are a
student, please get in touch if you are interested in helping in this
way. Numbers are strictly limited, and paying delegates are also welcome
as "gophers". This system worked well last year, and we hope to make it
more useful still this time around.

2. Monies from the silver sponsorships can be allocated to help defray
costs associated with sponsor-selected sprints, up to a maximum of $500.
Each silver sponsor can choose which sprint  to allocate the funds to.
The sprint leader and the sprint chair must agree on how the monies are
to be disbursed.  Any reimbursement for travel or other expenses must be
made based on submission of receipts.

3. Sprint leaders who organize and run sprints with at least two other
full-time attendants get waived admission to the conference if they want
it.

Those wishing to take advantage of these latter two offers should
contact the PSF directly at psf at python.org.

While I'm not a PSF Board member, and therefore cannot speak for the
Board, it seems to me that this is their way of trying to ensure that
PyCon benefits from having more of the best Python brains present at the
conference. I'd like to thank them for this support, and I hope all
readers will appreciate their gesture. I hope that in future we will see
the PSF promoting other development and educational activities with
equal enthusiasm.

See you at PyCon!

regards
--
Steve Holden                                 http://www.holdenweb.com/
ReportLab Enterprise Publishing Solutions    http://www.reportlab.com/
Telephone: +1-800 494 3119                        Fax: +1 703 278 8289
PyCon DC 2004                George Washington University, March 24-26





From jjl at pobox.com  Mon Jan 12 18:39:10 2004
From: jjl at pobox.com (John J. Lee)
Date: 12 Jan 2004 23:39:10 +0000
Subject: Why learn Python ??
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<btubno$bd8k6$1@ID-46268.news.uni-berlin.de>
	<100655fo84c2211@corp.supernews.com>
	<btv7gf$btv1p$1@ID-46268.news.uni-berlin.de>
Message-ID: <87d69og2jl.fsf@pobox.com>

"Derek" <none at none.com> writes:
[...]
> All I know is that there are thousands of extremely large projects
> written in C++, some consisting of millions of lines of code written
> by hundreds of developers.  C++, while far from perfect, has proven
> its worth on a huge scale.  Python, at the very least, has yet to do
> so.

See a recent thread here listing some fairly large Python projects.

Of course, taking lines of code at face value is rather like talking
about waiting lists instead of waiting times...


John


From sross at connectmail.carleton.ca  Sat Jan  3 14:57:44 2004
From: sross at connectmail.carleton.ca (Sean Ross)
Date: Sat, 3 Jan 2004 14:57:44 -0500
Subject: Integer math question
References: <3987e01c.0401030832.114c6f2a@posting.google.com>
	<11EJb.20461$Vl6.3782481@news20.bellglobal.com>
	<kTEJb.724242$HS4.5376202@attbi_s01>
Message-ID: <a7FJb.20824$Vl6.3808362@news20.bellglobal.com>

"Rainer Deyke" <rainerd at eldwood.com> wrote in message
news:kTEJb.724242$HS4.5376202 at attbi_s01...
> Sean Ross wrote:
> > a = bq + r       and  0<=r<b       [1]
>
> But 0 <= r < b is a contradiction when b < 0.
>

Right.  But, the division algorithm states "Let a,b be integers with b>0"
(which I mentioned in that post).






From stach at fr.USUN.pl  Fri Jan  9 16:13:58 2004
From: stach at fr.USUN.pl (Krzysztof Stachlewski)
Date: Fri, 9 Jan 2004 22:13:58 +0100
Subject: Python is far from a top performer according to benchmark
	test...
References: <ryELb.238$tK2.228@amstwist00>
Message-ID: <btn5db$2f8$1@absinth.dialog.net.pl>

"Carl" <phleum_nospam at chello.se> wrote in message
news:ryELb.238$tK2.228 at amstwist00...

> I have been experimenting with numerical algorithms in Python with a heavy
> use of the Numeric module. My experience is that Python is quite fast in
> comparison with (and sometimes as fast as) traditional languages such as C
> or C++.

With "heavy use of Numeric module" you were calling functions
written in C. So how can you say that Python is fast,
when C code is doing all the work.

Stach



From no.spam at at.all  Sun Jan 25 04:09:47 2004
From: no.spam at at.all (solo)
Date: Sun, 25 Jan 2004 09:09:47 +0000 (UTC)
Subject: Test
Message-ID: <bv014r$200e$1@pandora.alkar.net>

 Sorry, it&#39;s a test. 


From herrn at gmx.net  Sat Jan 24 17:27:32 2004
From: herrn at gmx.net (Marco Herrn)
Date: 24 Jan 2004 22:27:32 GMT
Subject: crypt, md5, sha modules
Message-ID: <buurgk$mflug$1@ID-165840.news.uni-berlin.de>

Hi, I don't know wether this is really the best place for asking this
question. If you know a better, please tell me.

The problem is an understanding of the 3 modules for hash algorithms. I
need a script to create hashed passwords (the user enters his password
and gets back the hash for it).
I need this for password verification in the mailserver exim, since it
supports hashed passwords. The user then sends his password in clear
(but always by using SSL), exim creates a hash and compares it to the
one in a specific file (there will be the hash created by my python
script).

Well, it works with the crypt module. But exim also supports an md5
hashing. Now I would like to use that, since it supports much better
passwords. But the md5 module works in a very different way than crypt.
Does anyone know whether such hashes are compatible with exim?

What makes me think about it is, that there is no salt and that the
output is non-ascii unless I use hexdigest() which only returns hex
numbers (when I look into my /etc/shadow each hash contains alphanumeric
characters).

And if possible I would also like to use sha, cause it is even a bit
more safer than md5, but am not sure, whether this is supported by exim.

So my main question is: can I use the md5 module for creating hashes
compatible with exims md5-function? And if so, how?

Thanks in advance for your help
Marco

-- 
Marco Herrn             herrn at gmx.net
(GnuPG/PGP-signed and crypted mail preferred)
Key ID: 0x94620736



From premshree_python at yahoo.co.in  Wed Jan 14 09:59:48 2004
From: premshree_python at yahoo.co.in (=?iso-8859-1?q?Premshree=20Pillai?=)
Date: Wed, 14 Jan 2004 14:59:48 +0000 (GMT)
Subject: pulling set of unique values from a list
In-Reply-To: <400551c0$1@baen1673807.greenlnk.net>
Message-ID: <20040114145948.35172.qmail@web8309.mail.in.yahoo.com>

http://www.premshree.resource-locator.com/python/urn.py

 --- Ben Davies <ben.m.davies at baesystems.com> wrote: >
I need to get [1,2,3] from [1,1,1,2,2,3,3] with as
> little effort possible
> for my CPU (and keyboard).
> I'd half expected there to be a list.values method
> to do this, but there
> isn't so I've have had to use a dictionary object:
> 
> >>> l=[1,1,1,2,2,2,3,3,3]
> >>> dict.fromkeys(l).keys()
> [1, 2, 3]
> 
> of course another way would be to do it 'by hand'
> like this:
> 
> >>> l=[1,1,1,2,2,2,3,3,3]
> >>> values=[]
> ... for v in l:
> ...     if not v in values: values.append(v)
> >>> values
> [1, 2, 3]
> 
> personally I prefer the dictionary one-liner, but
> with the second iterative
> way it is probably more obvious what the code is
> doing (and perhaps more
> efficient?).
> Is there any better way to do this that I've missed,
> I was kind of surprised
> not to find a values() method on the built-in list
> type?
> 
> 
> 
> 
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list 

=====
-Premshree
[http://www.qiksearch.com/]

________________________________________________________________________
Yahoo! India Mobile: Download the latest polyphonic ringtones.
Go to http://in.mobile.yahoo.com



From cpl.19.ghum at spamgourmet.com  Thu Jan 29 15:33:02 2004
From: cpl.19.ghum at spamgourmet.com (Harald Massa)
Date: Thu, 29 Jan 2004 21:33:02 +0100
Subject: mod_speling for python
References: <9d1c4d6d.0401282106.d69b2c5@posting.google.com>
	<mailman.986.1075389904.12720.python-list@python.org>
Message-ID: <Xns947FDC9C2B0FCcpl19ghumspamgourmet@62.153.159.134>

>     prtk3> I know there are drawbacks, disadvantages, this is "evil",
>     etc. prtk3> I only wanted to know what ways there are to add such
>     a hook if prtk3> it is possible without altering the C source for
>     python itself. 
> 
> Take a look at sys.excepthook.  Actual implementation is left as an
> exercise for the reader. <wink>

And be carefull: it breaks the Zen of Python and thereby removes it's mojo.


From na  Mon Jan  5 12:17:06 2004
From: na (Andrew)
Date: Mon, 5 Jan 2004 09:17:06 -0800
Subject: mysql python Newbie Question
References: <vvc80lb8mstue1@corp.supernews.com>
	<slrnbvea97.33b.davecook@localhost.localdomain>
	<vvergt26kp8gf8@corp.supernews.com>
	<70hkc1-r33.ln1@beastie.ix.netcom.com>
Message-ID: <vvgimvi342asbd@corp.supernews.com>

Ok I was able to connect to my local server but how do I find the host
address or port number of my remote server

The host address I usually use is localhost on my remote server

I searched google several times but could not  find a way to look it up
since my site uses php I tried phpinfo() but it did not show me anything

I found the ip address of my web site through nslookup

and tried to make a connection with that but to know avail

How do I lookup my host ipaddress and mysql port

Thanks in advance

Andrew



"Dennis Lee Bieber" <wlfraed at ix.netcom.com> wrote in message
news:70hkc1-r33.ln1 at beastie.ix.netcom.com...
> "Andrew" <na> fed this fish to the penguins on Sunday 04 January 2004
> 17:35 pm:
>
> >
> > how do I connect to a DB server that is not on my computer through
> > python to access my records.
> >
>         Well, in most cases, in the same way you connect to a local
server...
> You specify the host (or IP) address of the machine running the server
> (and maybe the port number if it is not on the standard port) when
> issuing the connect call.
>
> -- 
>  > ============================================================== <
>  >   wlfraed at ix.netcom.com  | Wulfraed  Dennis Lee Bieber  KD6MOG <
>  >      wulfraed at dm.net     |       Bestiaria Support Staff       <
>  > ============================================================== <
>  >        Bestiaria Home Page: http://www.beastie.dm.net/         <
>  >            Home Page: http://www.dm.net/~wulfraed/             <
>




From Kyler at news.Lairds.org  Tue Jan 20 10:22:03 2004
From: Kyler at news.Lairds.org (Kyler Laird)
Date: Tue, 20 Jan 2004 15:22:03 GMT
Subject: calling Pyrex results from C
Message-ID: <f7tvd1-a1o.ln1@jowls.lairds.org>

I need to submit C/C++ code for a class.  (It's not a programming
class.  The choice of language is inertial.  I think that it mostly
serves to distract students from the course subject.)  I'm fairly
fluent with C but it hurts to think about writing in C when Python
is *so* much more appropriate for these operations.

I'd like to keep my sanity and satisfy the course requirements by
programming in Python and converting the code to C.  It looks like
a few people have scratched this itch already, but of the
translators I found, most of them (Python2C, P2C, PyFront) seem to
be dead.  Pyrex, however, appears to be well-maintained and is even
available as a Debian package.
	http://www.cosc.canterbury.ac.nz/~greg/python/Pyrex/

I realize that the goal of Pyrex is to create a module that can be
called from Python.  For my need of calling the result from C, the
other utilities are probably more appropriate but I think that
Pyrex could be useful to me for less contrived situations than this
so it's worthwhile to learn more about it.


	http://www.cosc.canterbury.ac.nz/~greg/python/Pyrex/version/Doc/overview.html#InterfacingWithExternal

	You can also use public declarations to make C functions
	and variables defined in a Pyrex module available to
	external C code. The need for this is expected to be less
	frequent, but you might want to do it, for example, if you
	are embedding Python in another application as a scripting
	language. Just as a Pyrex module can be used as a bridge to
	allow Python code to call C code, it can also be used to
	allow C code to call Python code.

	[...]

	You can make C variables and functions defined in a Pyrex
	module accessible to external C code (or another Pyrex
	module) using the public keyword

I've discovered that as long as everything in the code is cdef-ed,
I can call Pyrex code from my C code.  If, however, I so much as
mention anything Pythonish, it segfaults during execution.

For example, this is fine.
	cdef public int foo():
		cdef int i
		i = 123

		return(i)

And this results in a segfault.
	cdef public int foo():
		cdef int i
		i = 123
		j = 5

		return(i)

This means that I can't, for example, make a function that takes a
filename (string), uses PIL to do a bunch of operations, and
returns a string.

Any suggestions (besides "suck it up and do it all in C")?

Thank you.

--kyler


From rnd at onego.ru  Mon Jan  5 07:19:24 2004
From: rnd at onego.ru (Roman Suzi)
Date: Mon, 5 Jan 2004 15:19:24 +0300 (MSK)
Subject: Is it bug or feature in sre?
In-Reply-To: <16377.21361.749300.297850@montanaro.dyndns.org>
References: <Pine.LNX.4.58.0401051204090.6205@suzi.com.onego.ru>
	<16377.21361.749300.297850@montanaro.dyndns.org>
Message-ID: <Pine.LNX.4.58.0401051516590.6205@suzi.com.onego.ru>

On Mon, 5 Jan 2004, Skip Montanaro wrote:

>
>     >>> re.compile("(?P<gr>[A-Z]*)?")
>     Roman> Traceback (most recent call last):
>     ...
>     Roman> sre_constants.error: nothing to repeat
>
>     Roman> I wonder why I can't do this?
>
> Is there some reason why
>
>     "(?P<gr>[A-Z]*)"

- I want it to be optional, so this is not what I wanted

> or
>
>     "(?P<gr>[A-Z]+)?"

- this is right thing

> isn't sufficient?  You specified the zero-or-more repetition inside the
> group.  There's nothing else to have zero-or-one of.
>
>
>     Roman> I guess it's of terrible style, but is this behaviour intentional
>     Roman> or not?
>
> I suspect it's intentional, since Fredrik went to the trouble of raising an
> exception with a useful error message. <wink>

And I fully agree with it.

>     Roman> Probably it is good idea to mention this in Python update path
>     Roman> documents.  Otherwise some old programs will mysteriously fail.
>
> What were you converting from, an older version of sre, pre, regex, or
> (shudder) regexp?

Python 1.5.2
re

> Skip




From michael at foord.net  Fri Jan 30 04:02:57 2004
From: michael at foord.net (Fuzzyman)
Date: 30 Jan 2004 01:02:57 -0800
Subject: Simple Database Package
References: <mailman.911.1075300017.12720.python-list@python.org>
	<8089854e.0401290034.4d57a45d@posting.google.com>
	<401925bb$0$575$b45e6eb0@senator-bedfellow.mit.edu>
Message-ID: <8089854e.0401300102.6fb34161@posting.google.com>

Brian Kelley <bkelley at wi.mit.edu> wrote in message news:<401925bb$0$575$b45e6eb0 at senator-bedfellow.mit.edu>...
> Fuzzyman wrote:
> > 
> > Anyway - I couldn't decide between SQLobject and metakit (I'd already
> > seen sqlite but wanted some advuice before I chose one to dive
> > into..).
> > 
> > Anyway - the windows download for SQLobject is zero sized - so I've
> > gone for metakit and will have  a play.
> 
> To save yourself some headaches, you might want to read my annotated 
> metakit documentation:
> 
> http://staffa.wi.mit.edu/people/kelley/tutorial/python.html


Thanks for your help.
I've had a brief look and I think it will more than do what I need and
opens up some interesting possibilities.

Unfortuantely due to censored internet I'm unable to follow the link
you suggest - but I've emailed you to see if you can send it to me.

Many Thanks

Fuzzyman

> 
> And make sure you join the metakit mailing list, we are here to help :)
> 
> It includes some common gotchas and has example code for you to play with.
> 
> Brian


From usenet_spam at janc.invalid  Fri Jan 16 00:05:19 2004
From: usenet_spam at janc.invalid (JanC)
Date: Fri, 16 Jan 2004 05:05:19 GMT
Subject: C++ bad-mouthing (was: Why learn Python ??)
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<878yka2sze.fsf@pobox.com> <100bbekd61fbl53@corp.supernews.com>
	<Xns94711F202CED8JanC@213.119.4.35>
	<100d4ljnic3l465@corp.supernews.com>
Message-ID: <Xns94723DEFEB830JanC@213.119.4.35>

claird at lairds.com (Cameron Laird) schreef:

> In article <Xns94711F202CED8JanC at 213.119.4.35>,
> JanC  <usenet at janc.cjb.net> wrote:

>>My copy of Netscape 0.94beta for Windows has a file date of 1994-11-22.
>>
>>And from the Grail docs:
>>"Grail was started in August 1995 as a quick and dirty demo. It quickly 
>>became a serious project, as witnessed by the release of version 0.2 in 
>>November 1995, and again by the planned release of version 0.3 (currently 
>>in beta) in June 1996."

> Yikes!  Good research--and I'm always in favor of that.
> I apologize for my error.  It's certainly disquieting;
> I had such a strong memory that Grail was around in 
> mid-'94 that I didn't verify the facts.  What *was* I
> thinking about?

Well, I didn't know Grail was that old, so I went searching.

But Netscape was largely based on Mosaic anyway; being developed by the 
same developers.  The beta I was talking about above still has a Mosaic 
logo.  ;-)

-- 
JanC

"Be strict when sending and tolerant when receiving."
RFC 1958 - Architectural Principles of the Internet - section 3.9


From try_vanevery_at_mycompanyname at yahoo.com  Thu Jan 15 00:14:41 2004
From: try_vanevery_at_mycompanyname at yahoo.com (Brandon J. Van Every)
Date: Wed, 14 Jan 2004 21:14:41 -0800
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
	<pan.2004.01.14.01.17.00.970198@fakeemail.com>
	<bu2ana$bmpci$1@ID-207230.news.uni-berlin.de>
	<Xns94711BBF5F7D6JanC@213.119.4.35>
Message-ID: <bu56ud$e29od$1@ID-207230.news.uni-berlin.de>


"JanC" <usenet_spam at janc.invalid> wrote in message
news:Xns94711BBF5F7D6JanC at 213.119.4.35...
> "Brandon J. Van Every" <try_vanevery_at_mycompanyname at yahoo.com> schreef:
>
> > I am not sure how I feel about it.  I think it only bothers me when
> > they claim to be cross-platform in theory, and the Windows build
> > simply does not work in practice.  A working Windows build should be
> > easy to obtain all the dependencies for, and it should just build.
> > When it doesn't do that, when you have to chase all over Hell's green
> > acre to find the libraries, and then the build simply coughs and gags
> > and dies, I'm not even slightly amused at how "cross-platform" some
> > Linuxer is claiming things to be.
>
> You think "cross-platform" means "it runs out-of-the-box on all possible
> platforms that ever existed, now exist, and will ever exist"?

Please.  I talked about supporting *Windows*.  You know, the globally
dominant OS.

-- 
Cheers,                     www.indiegamedesign.com
Brandon Van Every           Seattle, WA

20% of the world is real.
80% is gobbledygook we make up inside our own heads.





From jcarlson at nospam.uci.edu  Sat Jan 31 02:20:00 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Fri, 30 Jan 2004 23:20:00 -0800
Subject: python in dreamweaver
In-Reply-To: <bvfe6u$nqn$1@news-reader1.wanadoo.fr>
References: <d99e1341.0401271818.625d5ef2@posting.google.com>
	<bv86nc$rto$2@news-reader4.wanadoo.fr>
	<d99e1341.0401291857.6deabb3d@posting.google.com>
	<bvem9h$j3a$1@news-reader5.wanadoo.fr>
	<bven43$gcc$1@news.service.uci.edu>
	<bvfe6u$nqn$1@news-reader1.wanadoo.fr>
Message-ID: <bvfl36$cpb$1@news.service.uci.edu>

>>>>It would be significantly more Pythonic to have a template similar to
> 
> the following...
> 
> Yes, but there are the visual aspect of DM...
> 
> 
> MCI

So do your templates in Dreamweaver, and read them in with python during 
runtime.  All I'm saying is that:

 >>> template = template.replace('REPLACE_THIS_WITH_MENU', menu)
.
.
.
 >>> template = template.replace('REPLACE_THIS_WITH_CONTENT', content)

is not pythonic, but using standard python string formatting options:

 >>> output = template%{'menu':menu, 'content':content}

is not only pythonic, it is faster for large numbers of insertions, and 
is much easier to extend.

  - Josiah


From raneb at slingshot.co.nz  Tue Jan 27 14:54:45 2004
From: raneb at slingshot.co.nz (Rane Bowen)
Date: Wed, 28 Jan 2004 08:54:45 +1300
Subject: Optional Parameters in python COM
References: <bv1rek$oof$1@lust.ihug.co.nz> <bv3pos$2no$1@lust.ihug.co.nz>
Message-ID: <bv6fmj$rah$1@lust.ihug.co.nz>

<grind>
"Rane Bowen" <raneb at slingshot.co.nz> wrote in message
news:bv3pos$2no$1 at lust.ihug.co.nz...
> <bump>
>
> "Rane Bowen" <raneb at slingshot.co.nz> wrote in message
> news:bv1rek$oof$1 at lust.ihug.co.nz...
> > Hi,
> >
> > I am using python with a makepy generated wrapper on a COM application.
> One
> > of this object's methods has 3 parameters, two of which are optional.
> > If I call the method with just the non-optional parameter, or all three
> > parameters, it works.  If I call it with the first two parameters, I get
> the
> > following error:
> >
> > (-2147352567, 'Exception occurred.', (0, 'Amphora.Session.1', 'A bad
> > parameter was passed to the method', None, 0, -1610547133), None)
> >
> > I have tried calling the method by using the names of the optional
> > parameters, and I have also tried using pythoncom.Missing and
> > pythoncom.Empty for the non essential parameter.  I have also edited the
> > generated .py file so that it contains the following:
> >
> > defaultNamedOptArg=pythoncom.Empty
> > defaultNamedNotOptArg=pythoncom.Empty
> > defaultUnnamedArg=pythoncom.Empty
> >
> > But this has not made any difference!  Any help would be very much
> > appreciated.
> >
> > Cheers,
> >
> > Rane
> >
> >
>
>




From asdf at asdf.com  Fri Jan  9 04:08:09 2004
From: asdf at asdf.com (John Smith)
Date: Fri, 9 Jan 2004 04:08:09 -0500
Subject: user/passwd entry
Message-ID: <btlqom$og6$1@news.eecs.umich.edu>

Hello,

I'm wondering how to enter the user and password for a site over http?
What's the module that I should use: urllib, htmllib, HTMLParser, httplib?
What are the classes I should call, etc?  Thanks for any help.

-k




From diego.andrade at smartech.com.br  Thu Jan 15 12:43:22 2004
From: diego.andrade at smartech.com.br (Diego Ribeiro de Andrade)
Date: Thu, 15 Jan 2004 15:43:22 -0200
Subject: Tcl/Tk Support
References: <E1Af0F7-0003lB-L4@mail.python.org>
	<20040109201513.GC2810@unpythonic.net>
Message-ID: <002c01c3db8f$12431ba0$7900a8c0@smartech.com.br>

Yeah! It Works Thanks.

 Everyone else told me that It was native in Python. May I did something
wrong in the installation of Red Hat9?

-----Mensagem Original-----
De: "Jeff Epler" <jepler at unpythonic.net>
Para: "Diego.andrade" <diego.andrade at smartech.com.br>
Cc: <python-list at python.org>
Enviada em: sexta-feira, 9 de janeiro de 2004 18:15
Assunto: Re: Tcl/Tk Support


> try installing the RPM called
> tkinter-2.2.2-26.i386.rpm
>
> Jeff
>




From sridharinfinity at yahoo.com  Tue Jan 20 07:13:37 2004
From: sridharinfinity at yahoo.com (Sridhar R)
Date: 20 Jan 2004 04:13:37 -0800
Subject: converting base class instance to derived class instance
Message-ID: <930ba99a.0401200413.5fae6fb9@posting.google.com>

Consider the code below,

class Base(object):
  pass

class Derived(object):

  def __new__(cls, *args, **kwds):
    # some_factory returns an instance of Base
    # and I have to derive from this instance!
    inst = some_factory() # this returns instance of Base
    return inst  # Oops! this isn't an instance of Derived

  def __init__(self):
    # This won't be called as __new__ returns Base's instance
    pass

  The constrait is there is some factory function that creates an
instance of Base class.  So I _can't_ call "Base.__init__(self)" in
Derived.__init__ func, as their will be _two_ instances (one created
by Derived.__init__ and other created by the factory function)

  Simply I want to get a derived class object, but instead of allowing
_automatic_ creation of Base instance, I want to use _existing_ Base's
instance, then use this as a Derived's instance.

  Will metaclass solve this problem?


From http  Tue Jan 13 14:37:36 2004
From: http (Paul Rubin)
Date: 13 Jan 2004 11:37:36 -0800
Subject: C++ bad-mouthing (was: Why learn Python ??)
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<7xisjh1e3i.fsf@ruckus.brouhaha.com>
	<10064loqc7sd7e3@corp.supernews.com>
	<7xeku496wx.fsf@ruckus.brouhaha.com>
	<donn-9D2291.16343412012004@nntp6.u.washington.edu>
	<40041576.D070723E@engcorp.com>
	<donn-8DC721.09485713012004@nntp6.u.washington.edu>
	<400446D5.1265452A@engcorp.com>
Message-ID: <7xoet7zlkv.fsf@ruckus.brouhaha.com>

Peter Hansen <peter at engcorp.com> writes:
> Presumably the IRS requires networking, some user interface
> capabilities, probably a bunch of database interfaces, really
> sophisticated testing, and these days maybe even some standardization
> in the area of, say, XML or something like that.

I think if there's one application that needs decimal arithmetic...


From No.Spam.mc at No.Spam.mclaveau.No.Spam.com  Mon Jan  5 04:07:58 2004
From: No.Spam.mc at No.Spam.mclaveau.No.Spam.com (Michel Claveau/Hamster)
Date: Mon, 5 Jan 2004 10:07:58 +0100
Subject: explicit variable declaration
References: <wa9Kb.2393503$uj6.5826057@telenews.teleline.es>
Message-ID: <btb9cm$3c2$1@news-reader3.wanadoo.fr>

Hi !

"Variable" is a bad word - beurk ! -   In Python there are ref-on-objects ;
it's without interest with declaration (explicit).

@-salutations
--
Michel Claveau





From mhammond at skippinet.com.au  Thu Jan 15 21:09:19 2004
From: mhammond at skippinet.com.au (Mark Hammond)
Date: Fri, 16 Jan 2004 13:09:19 +1100
Subject: How to call a system command with flexibility on Windows
In-Reply-To: <4aEMb.1798$PK6.17978@nnrp1.uunet.ca>
References: <4aEMb.1798$PK6.17978@nnrp1.uunet.ca>
Message-ID: <bu7h4j$2d9k$2@arachne.labyrinth.net.au>

Nicolas Fleury wrote:

> Hi everyone,
>     I have a hard time trying to call a system command with the 
> following capability on Windows:
> - Redirection of stdout and stderr.
> - Have the return code.
> 
> The documentation seems to say it's only possible on Unix, have I missed 
> something.  Thx for your help.


Some, if not all of the popen functions on Windows will return the exit 
code of the program when closing the last returned handle.  I'm afraid I 
have no time to check the docs or find sample code, but it does work :)

Mark.



From angstrom at lionsanctuary.net  Fri Jan 16 03:15:11 2004
From: angstrom at lionsanctuary.net (Owen Jacobson)
Date: Fri, 16 Jan 2004 08:15:11 GMT
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
	<pan.2004.01.14.01.17.00.970198@fakeemail.com>
	<bu2ana$bmpci$1@ID-207230.news.uni-berlin.de>
	<Xns94711BBF5F7D6JanC@213.119.4.35>
	<LiwNb.8126$f97.2162@fe3.columbus.rr.com>
	<PQMNb.11701$1e.731@newsread2.news.pas.earthlink.net>
Message-ID: <pan.2004.01.16.08.15.11.730858@lionsanctuary.net>

On Fri, 16 Jan 2004 07:58:39 +0000, Andrew Dalke wrote:

> My favorite program for this is /bin/true.  On some machines it is 0
> bytes long.  It works on Unix and, with a ".bat" extension, on MS
> Windows.

[root at eidolon root]# uname -a
Linux eidolon.lionsanctuary.net 2.4.20-24.9 #1 Mon Dec 1 11:43:36 EST 2003 i686
athlon i386 GNU/Linux
[root at eidolon root]# ls -l /bin | grep true
-rwxr-xr-x    1 root     root        10172 Oct 29 06:44 true
[root at eidolon root]# ldd /bin/true
        libc.so.6 => /lib/tls/libc.so.6 (0x42000000)
        /lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x40000000)

Not this machine, apparently.

-- 
Some say the Wired doesn't have political borders like the real world,
but there are far too many nonsense-spouting anarchists or idiots who
think that pranks are a revolution. 



From anton at vredegoor.doge.nl  Sat Jan 10 23:24:13 2004
From: anton at vredegoor.doge.nl (Anton Vredegoor)
Date: Sun, 11 Jan 2004 05:24:13 +0100
Subject: help with Python Environment For Blind User
References: <tH2Mb.6292$EL4.3998@nwrddc02.gnilink.net>
Message-ID: <4000d088$0$7530$3a628fcd@reader2.nntp.hccnet.nl>

Zachary" <vzd1s1fs at verizon.net> wrote:

>I'm a blind non-programmer trying to learn Python.
>I've got python 2.3 for windows, but the problem is that Idle doesn't seem
>to work two well with my screen reading program.
>Is notepad, then, my only other real choice?  Pythonwin worked similarly
>badly.
>The problem is my programs inability to track the cursor.  It doesn't tell
>me what line I'm on, where I am in that line, or what I just deleted.  It
>would do this in a normal editor.
>Any help with this would be appreciated.

Idle provides an editor and an interactive commandline. Maybe you end
up in the commandline while expecting to be in the editor? Pythonwin
has a similar setup. 

I vaguely remember being puzzled by this too when I first met Python a
long time ago. Later I had another problem in that I didn't know how
to "run" a Python script. For some time I tried to use MsDos batch
files to call the scripts from. In the end things settled down and I
became comfortable with the tools. 

At the moment my setup includes a lot of tools that aren't standard,
some tools were written by me, using Python!

Using my eyes to read from the screen and already being a programmer
when  I started with Python it's a bit hard to anticipate your
specific situation. 

Don't give up to soon. There seems to be one obvious way to do things
with Python, but in my case the interpretation of what is obvious
changes fairly often, for the better I hope :-) 

Anton


From raneb at slingshot.co.nz  Sun Jan 25 20:44:53 2004
From: raneb at slingshot.co.nz (Rane Bowen)
Date: Mon, 26 Jan 2004 14:44:53 +1300
Subject: Optional Parameters in python COM
Message-ID: <bv1rek$oof$1@lust.ihug.co.nz>

Hi,

I am using python with a makepy generated wrapper on a COM application. One
of this object's methods has 3 parameters, two of which are optional.
If I call the method with just the non-optional parameter, or all three
parameters, it works.  If I call it with the first two parameters, I get the
following error:

(-2147352567, 'Exception occurred.', (0, 'Amphora.Session.1', 'A bad
parameter was passed to the method', None, 0, -1610547133), None)

I have tried calling the method by using the names of the optional
parameters, and I have also tried using pythoncom.Missing and
pythoncom.Empty for the non essential parameter.  I have also edited the
generated .py file so that it contains the following:

defaultNamedOptArg=pythoncom.Empty
defaultNamedNotOptArg=pythoncom.Empty
defaultUnnamedArg=pythoncom.Empty

But this has not made any difference!  Any help would be very much
appreciated.

Cheers,

Rane




From jarausch at skynet.be  Mon Jan 26 16:28:31 2004
From: jarausch at skynet.be (Helmut Jarausch)
Date: Mon, 26 Jan 2004 22:28:31 +0100
Subject: How does compare work?
Message-ID: <40158680$0$7044$ba620e4c@news.skynet.be>

Hi,

what does Python do if two objects aren't comparable (to my opinion)
If I've understood "Python in a Nutschell" correctly it should raise an
exception but it doesn't do for me.

Here are two examples

if 2 > '1' : print "greater"
else       : print "less_or_equal"

   prints  less_or_equal

and

class C:
     def __init__(self): pass

X=C()
if 2 > X : print "greater"

   prints  greater

In both cases I don't get an exception.
But I'd like to since these lead to hard-to-find bugs.

Thanks for shedding some light on this.

P.S. This is Python 2.4 (CVS)

-- 
Helmut Jarausch

Lehrstuhl fuer Numerische Mathematik
RWTH - Aachen University
D 52056 Aachen, Germany


From michele.simionato at poste.it  Tue Jan 20 02:55:11 2004
From: michele.simionato at poste.it (Michele Simionato)
Date: 19 Jan 2004 23:55:11 -0800
Subject: best book: aint no such thing, and encouragement for old coots
References: <mailman.409.1074191840.12720.python-list@python.org>
	<bu8j31$s4c$1@scotsman.ed.ac.uk>
	<pan.2004.01.16.11.58.58.634101@yahoo.com>
	<m3vfn86vwn.fsf@pc150.maths.bris.ac.uk>
	<d3c9c04.0401190851.5a2f006b@posting.google.com>
Message-ID: <95aa1afa.0401192355.77568ed4@posting.google.com>

cartermark46 at ukmail.com (Mark Carter) wrote in message news:<d3c9c04.0401190851.5a2f006b at posting.google.com>...
> I suppose that Schemers and Lispers take the attitude that a lack of
> syntax is an advantage, because you can ultimately program in any
> paradigm you wish. It's "just" a case of writing code that implements
> the paradigm. 

Uh? The lack of syntax has nothing to do with the lack of paradigm,
I miss you point, sorry.

> I have also heard claims that the existence of
> parantheses in s-exprs is a red herring as far as readability is
> concerned.

That's true, the parentheses are a not a problem for readability, they
are a problem for *writability*: in practice, they force you to use emacs
or The Other Editor. Somebody can argue that this is a Good Thing,
anyway ;) So, it is somewhat true that Lisp/Scheme are difficult to 
read, but this is due to the choice of names and to the unusual order 
of evaluation more than to the parentheses. Just my 2 eurocents,

   Michele Simionato


From rays at san.rr.com  Wed Jan 28 22:04:22 2004
From: rays at san.rr.com (RJ)
Date: Wed, 28 Jan 2004 19:04:22 -0800
Subject: win32com - .ocx won't Dispatch...
Message-ID: <5.2.1.1.2.20040128185707.05ece8d0@pop-server.san.rr.com>

Hi,
I've been going over the Quick Start to Client side COM and Python and many 
other sources, but cannot find an example that will get my com/ActiveX .ocx 
USB device driver imported.

The Excel and Word examples run fine.
win32com.client.Dispatch("Excel.Application") etc., but how does one know 
the ("<foo>.<bar>") to type in? Excel looks only vaguely like 
"Excel.Application" in the com browser.

Firstly, I found the ocx from the Python Object Browser.
I ran makepy.py on EDREUtlX.ocx (USB device driver) which created
8AA34F82-95C9-11D3-8EB6-00C0DF2247CAx0x3x5.py
etc. in gen_py\,
but, I cannot find a syntax to get Dispatch to accept it...

from win32com.client import Dispatch
# failed attempts
Dispatch("EDRE Utility Control") # name in browser
Dispatch('{8AA34F82-95C9-11D3-8EB6-00C0DF2247CAx0x3x5}')
Dispatch('{8AA34F82-95C9-11D3-8EB6-00C0DF2247CA}')
Dispatch("8AA34F82-95C9-11D3-8EB6-00C0DF2247CA")
Dispatch("8AA34F82-95C9-11D3-8EB6-00C0DF2247CAx0x3x5")

all return:
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
   File "C:\Python23\lib\site-packages\win32com\client\__init__.py", line 
95, in Dispatch
     dispatch, userName = 
dynamic._GetGoodDispatchAndUserName(dispatch,userName,clsctx)
   File "C:\Python23\lib\site-packages\win32com\client\dynamic.py", line 
84, in _GetGoodDispatchAndUserName
     return (_GetGoodDispatch(IDispatch, clsctx), userName)
   File "C:\Python23\lib\site-packages\win32com\client\dynamic.py", line 
72, in _GetGoodDispatch
     IDispatch = pythoncom.CoCreateInstance(IDispatch, None, clsctx, 
pythoncom.IID_IDispatch)
pywintypes.com_error: (-2147221005, 'Invalid class string', None, None)

So, what is the required syntax?

Thanks,
Ray




From jdhunter at ace.bsd.uchicago.edu  Wed Jan 21 22:59:33 2004
From: jdhunter at ace.bsd.uchicago.edu (John Hunter)
Date: Wed, 21 Jan 2004 21:59:33 -0600
Subject: python
In-Reply-To: <BAY9-F28JJjIRPZYvJ4000795c3@hotmail.com> ("Jess Martin"'s
	message of "Thu, 22 Jan 2004 14:17:20 +1030")
References: <BAY9-F28JJjIRPZYvJ4000795c3@hotmail.com>
Message-ID: <m2n08gzl96.fsf@mother.paradise.lost>

>>>>> "Jess" == Jess Martin <trickster121990 at hotmail.com> writes:

    Jess> i need help.  im just learning to program and every time i
    Jess> try to do a command more than a line long it wont work

You probably need to terminate the partial command with a slash '\',
as in

>>> x = 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 + \
... 2 + 2 + 2
>>>
>>> x
22

JDH



From newsgroups at jhrothjr.com  Sun Jan 11 16:12:20 2004
From: newsgroups at jhrothjr.com (John Roth)
Date: Sun, 11 Jan 2004 16:12:20 -0500
Subject: readling newlines
References: <IXTLb.87546$_P.3280883@news4.tin.it>
Message-ID: <1003f4l753jqc09@news.supernews.com>


"Alessandro Crugnola *sephiroth*" <alessandro at sephiroth.it> wrote in message
news:IXTLb.87546$_P.3280883 at news4.tin.it...
> Hi, I'm trying to detect the newlines method of a file opened.
> I'm using the 'U' mode as parameter when opening a file, but for every
file opened the result is always "\r\n", even if the file has
> been saved with the "\n" newline method.
> Is there i'm missing?
>
> I'm on Windows with python 2.3.3

Regardless of what you tell it, Python will always write a text
file with the operating system's line separators. In Windows,
that's \r\n. Universal newline mode only operates on input,
and will translate *all* common system's line separators into
/n.

In other words, if you write a file in text mode using /n, and
then read it back in binary mode, you'll see /r/n for the line
separators. Universal newline support does not change this
because it does not change what you see in binary mode.

John Roth
>
>




From vincent_delft at yahoo.com  Sat Jan 10 14:36:44 2004
From: vincent_delft at yahoo.com (vincent delft)
Date: 10 Jan 2004 11:36:44 -0800
Subject: what is best for web development??
References: <f046efac.0401100358.5aa812a0@posting.google.com>
Message-ID: <5c184570.0401101136.5585af33@posting.google.com>

I've was faced to the same problem few months ago. After checked lot
of different solutions, I've select Draco (draco.boskant.nl).

A framework around mod_python that offers lot of flexibility and can
be used for havy loaded web site.

One of the nicest feature is the possibility to split code and HTML.

I'm not objective, but I propose you to make your own choice amongst
all the good solutions (karrigel, albatros are very good too), but
have a look at draco.




ketulp_baroda at yahoo.com wrote in message news:<f046efac.0401100358.5aa812a0 at posting.google.com>...
> i am developing a web application and i am really confused on what should i use.
> should i use just python and use the cgi module availabe.
> Or should i use application like WebWare.Also there is PSP available.
> I am really confused and need help


From python at quixs.com  Wed Jan 14 12:51:02 2004
From: python at quixs.com (Lars Heuer)
Date: Wed, 14 Jan 2004 18:51:02 +0100
Subject: wxPython worries
In-Reply-To: <375234841.20040114183449@quixs.com>
References: <mailman.352.1074092092.12720.python-list@python.org>
	<40055e11$0$282$4d4ebb8e@news.nl.uu.net>
	<375234841.20040114183449@quixs.com>
Message-ID: <127075610.20040114185102@quixs.com>

Hello again,

Forgot to mention SPE (uses the mentioned wxGlade):
http://spe.pycs.net/

Maybe this tool is more "IDE"-like. ;)

Regards,
Lars




From thitucad6tim at jetable.org  Tue Jan 27 16:31:11 2004
From: thitucad6tim at jetable.org (Nicolas Lehuen)
Date: Tue, 27 Jan 2004 22:31:11 +0100
Subject: Python 2.3.3 : Win32 build vs Cygwin build performance ?
References: <4016a71d$0$15004$afc38c87@news.easynet.fr>
Message-ID: <4016d8a3$0$19263$626a54ce@news.free.fr>

I have reproduced this on another machine. I tried playing with the
optimizer options (-O, -OO) and the result is the same : on pystone, Cygwin
1.5.6-1 + Python 2.3.3-1 is nearly twice as better as the standard Python
2.3.3 distribution for Win32...

I have checked that both distribution are psyco-free. Does anyone have an
idea of what is going on there ? Better compilation optimisation settings ?
GCC 3.3.1 producing faster code than MSVC 6 (allright, I can imagine that,
but twice faster ???) ?

Regards
Nicolas

"Nicolas Lehuen" <hotrearia at jetable.net> a ?crit dans le message de news:
4016a71d$0$15004$afc38c87 at news.easynet.fr...
> Hi,
>
> Is it me, or does anyone else get significantly better pystone results
under
> Cygwin versus the standard Win32 build ?
>
> CYGWIN 1.5.6 + python 2.3.3-1 :
> $ time python /usr/lib/python2.3/hotshot/stones.py
> Pystone(1.1) time for 50000 passes = 2.344
> This machine benchmarks at 21331.1 pystones/second
>          850004 function calls in 4.371 CPU seconds
>
>    Ordered by: internal time, call count
>
>    ncalls  tottime  percall  cumtime  percall filename:lineno(function)
>     50000    1.351    0.000    2.917    0.000 pystone.py:133(Proc1)
>     50000    1.132    0.000    1.202    0.000 pystone.py:53(copy)
>         1    0.609    0.609    4.371    4.371 pystone.py:79(Proc0)
>     50000    0.239    0.000    0.239    0.000 pystone.py:208(Proc8)
>    150000    0.184    0.000    0.184    0.000 pystone.py:203(Proc7)
>    150000    0.157    0.000    0.157    0.000 pystone.py:221(Func1)
>     50000    0.147    0.000    0.200    0.000 pystone.py:229(Func2)
>     50000    0.104    0.000    0.153    0.000 pystone.py:160(Proc3)
>     50000    0.098    0.000    0.153    0.000 pystone.py:184(Proc6)
>     50000    0.090    0.000    0.090    0.000 pystone.py:149(Proc2)
>     50002    0.070    0.000    0.070    0.000 pystone.py:45(__init__)
>     50000    0.068    0.000    0.068    0.000 pystone.py:177(Proc5)
>     50000    0.067    0.000    0.067    0.000 pystone.py:170(Proc4)
>     50000    0.055    0.000    0.055    0.000 pystone.py:246(Func3)
>         1    0.000    0.000    4.371    4.371 pystone.py:67(pystones)
>         0    0.000             0.000          profile:0(profiler)
>
>
> real    0m26.603s
> user    0m25.765s
> sys     0m0.280s
>
> Win32 :
> C:\Documents and Settings\nlehuen>python c:\Python23\Lib\hotshot\stones.py
> Pystone(1.1) time for 50000 passes = 4.1542
> This machine benchmarks at 12036 pystones/second
>          850004 function calls in 14.917 CPU seconds
>
>    Ordered by: internal time, call count
>
>    ncalls  tottime  percall  cumtime  percall filename:lineno(function)
>         1    3.772    3.772   14.917   14.917 pystone.py:79(Proc0)
>     50000    2.226    0.000    6.314    0.000 pystone.py:133(Proc1)
>    150000    1.166    0.000    1.166    0.000 pystone.py:221(Func1)
>    150000    1.123    0.000    1.123    0.000 pystone.py:203(Proc7)
>     50000    1.075    0.000    1.075    0.000 pystone.py:208(Proc8)
>     50000    0.939    0.000    1.410    0.000 pystone.py:53(copy)
>     50000    0.903    0.000    1.279    0.000 pystone.py:229(Func2)
>     50000    0.795    0.000    1.157    0.000 pystone.py:160(Proc3)
>     50000    0.776    0.000    1.137    0.000 pystone.py:184(Proc6)
>     50000    0.500    0.000    0.500    0.000 pystone.py:149(Proc2)
>     50002    0.472    0.000    0.472    0.000 pystone.py:45(__init__)
>     50000    0.416    0.000    0.416    0.000 pystone.py:170(Proc4)
>     50000    0.394    0.000    0.394    0.000 pystone.py:177(Proc5)
>     50000    0.361    0.000    0.361    0.000 pystone.py:246(Func3)
>         1    0.000    0.000   14.917   14.917 pystone.py:67(pystones)
>         0    0.000             0.000          profile:0(profiler)
>
> (total real time elapsed > 30 seconds)
>
>




From python-url at phaseit.net  Mon Jan 26 21:58:14 2004
From: python-url at phaseit.net (John J Lee)
Date: Tue, 27 Jan 2004 02:58:14 -0000
Subject: Dr. Dobb's Python-URL! - weekly Python news and links (Jan 26)
Message-ID: <101bku68i9ffe90@corp.supernews.com>


QOTW:  "I'd love it if we could come up with a different term for these
beasts than 'new style classes'."  --Barry Warsaw
"Then let me suggest ectomorphic classes, as opposed to the previous
endomorphic classes.  Roll-your-own classes can be called mesomorphic
classes.  Extension classes can be called paleomorphic classes.  Then
there's a precise term for each kind, and bystanders are automically
informed by the very terminology used that their lives are too short to
worry about the distinctions being drawn <wink>."  --Tim Peters
    http://mail.python.org/pipermail/python-dev/2004-January/042181.html


    Plone wins ticket to Comdex
        http://osdir.com/Article199.phtml

    Travis Oliphant courageously asks for feedback on a controversial
    decision for users of large homogeneous arrays
        http://groups.google.com/groups?selm=mailman.517.1074548025.12720.python-list%40python.org

    Gandalf, Tim Peters and others discuss the risks, or otherwise, of
    unpickling
        http://groups.google.com/groups?selm=bufkot$96vl$1%40netnews.upenn.edu

    Peter Otten can't resist demonstrating bad Python style by emulating
    the lazy evaluation built into other languages
        http://groups.google.com/groups?selm=buhd16$1qd$01$1%40news.t-online.com

    What's *really* the correct way to launch a simple external Windows
    application?
       http://groups.google.com/groups?selm=100p81q3kshsuca%40corp.supernews.com

    Fran?ois Pinard embeds Python in Pyrex in C
        http://groups.google.com/groups?selm=mailman.549.1074619857.12720.python-list%40python.org

    Thomas Heller is persuaded to keep ctypes cross-platform
        http://aspn.activestate.com/ASPN/Mail/Message/ctypes-users/1979390

    The long-awaited Learning Python, 2nd edition is out (O'Reilly)
        http://books.slashdot.org/article.pl?sid=04/01/20/176200

    Version 1.19 of Reportlab, the PDF generation library, is out:
        http://groups.google.com/groups?selm=jvHZstAn4rDAFwUV%40jessikat.fsnet.co.uk

    Matthias Baas releases Python Computer Graphics Kit v1.1.0
        http://groups.google.com/groups?selm=mailman.1074534902.1084.clpa-moderators%40python.org

    Zope 2.6.4 rc1 and 2.7.0 rc1 Released (along with standalone ZODB
    releases)
        http://groups.google.com/groups?selm=mailman.1074552605.27880.clpa-moderators%40python.org
        http://groups.google.com/groups?selm=mailman.1074552604.27857.clpa-moderators%40python.org

    Marc-Andre Lemburg releases eGenix mxODBC Zope Database Adapter 1.0.8
        http://groups.google.com/groups?selm=mailman.1074879183.6139.clpa-moderators%40python.org


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

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

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

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

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

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

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

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

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

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

    Cetus collects Python hyperlinks.
        http://www.cetus-links.org/oo_python.html

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

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

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

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

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

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


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

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


-- The Python-URL! Team--

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



From __peter__ at web.de  Fri Jan  2 11:18:11 2004
From: __peter__ at web.de (Peter Otten)
Date: Fri, 02 Jan 2004 17:18:11 +0100
Subject: optparse bug?
References: <mailman.25.1073058904.12720.python-list@python.org>
Message-ID: <bt45or$mac$03$1@news.t-online.com>

Andres Corrada-Emmanuel wrote:

> I'm getting a conflict between options defined between two different
> scripts and I'm wondering if it is a bug or the intended effect.

Neither. I'm pretty sure that you somehow managed to add all options to a
single OptionParser instance. Do you know about the

if __name__ == "__main__":
    # code to run only in standalone mode

technique? For a more detailed analysis you have to provide the actual code
of a minimal example. 

Peter



From max at alcyone.com  Mon Jan  5 18:18:40 2004
From: max at alcyone.com (Erik Max Francis)
Date: Mon, 05 Jan 2004 15:18:40 -0800
Subject: OT: Vertical Tab was Re: indendation question
References: <20031226033210.GA24039@mrna.tn.nic.in>
	<mailman.130.1072540438.684.python-list@python.org>
	<3FF9E883.BC8AB864@engcorp.com>
	<pan.2004.01.05.23.05.44.722929@yahoo.com>
Message-ID: <3FF9F0D0.3AA099CD@alcyone.com>

Samuel Walters wrote:

> What exactly *is* a vertical tab?  I don't think I've ever seen it on
> a
> keyboard or used in the wild.  I think I may have seen it on the
> keybindings for a mainframe terminal I once used, but I didn't really
> dig
> too deep because, as far as operating the mainframe was concerned, I
> was a
> well trained monkey who could check and restart failed jobs.

It's a whitespace control character, whose precise meaning is, as far as
I know, left to the implementation.  In the same way that a horizontal
tab (HT) -- what you'd generally think of us a tab -- means "advance the
cursor some amount of space forward on the line," a vertical tab would
mean "advance the cursor some amount of space downward on the page."  I
don't have a copy of the ASCII Standard in front of me so I can't say
more, but it's not used a lot of these days.

-- 
 __ Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
/  \ San Jose, CA, USA && 37 20 N 121 53 W && &tSftDotIotE
\__/ Fifteen minutes / To show the world
    -- Nik Kershaw


From mike at mhuffman.com  Sat Jan 24 12:55:12 2004
From: mike at mhuffman.com (Mike Huffman)
Date: 24 Jan 2004 09:55:12 -0800
Subject: Program Python in VIM
References: <871xpsc5zf.fsf@tulip.whu.ca> <r7xrvm1a.fsf@yahoo.co.uk>
	<40103ee7.108130723@news.blueyonder.co.uk>
	<3ae9c53d.0401230913.64c7150d@posting.google.com>
	<Xns94797D940180Asdfexpertunecom@216.168.3.44>
Message-ID: <3ae9c53d.0401240955.153f19db@posting.google.com>

Scott F <sdfATexpertuneDOTcom> wrote in message news:<Xns94797D940180Asdfexpertunecom at 216.168.3.44>...
> This should do it.
> 
>     map <somekey> :w<CR>:!python %<CR>

It does indeed, Thanks!

Unfortuantely I do not use vi consistently enough to ever get beyond
the basics. Had some false starts finding a good key to map that
worked on all my vi installations (Linux, Cygwin, Windows console);
settled on Ctrl-K: unused and easy to type.

Actually, at the moment I am using the maping for Perl, but don't tell
anyone :-)

Mike


From francisgavila at yahoo.com  Mon Jan 19 23:09:06 2004
From: francisgavila at yahoo.com (Francis Avila)
Date: Mon, 19 Jan 2004 23:09:06 -0500
Subject: New to Python: my impression v. Perl/Ruby
References: <mailman.493.1074484056.12720.python-list@python.org><87ad4kxees.fsf@pobox.com>
	<mailman.524.1074550958.12720.python-list@python.org>
Message-ID: <100pahdc7d98q58@corp.supernews.com>


Wayne Folta wrote in message ...
>John,
>
[snippage]
>(Actually, now that I reread it, I should've said "pure OO", which I
>believe is more reflective of their statements. And this has some basis
>in fact, I believe, if you look at the v1 of Ruby and Python and what
>is first-class and what is not.)

[snippage]

>Again, as you yourself say, they chose to subclass protocol services
>off of a class 'protocol' and Python did not. In fact, Python chose to
>not subclass POP3 from anything. Why? Because of the culture, in my
>opinion. Ruby emphasizes OO and that it's "pure OO" (their opinion) and
>so an implementation that involves a Smalltalk-ish subclassing of
>everything recommends itself.
>
>Python has a different culture where such strict tree-like class
>structure does not recommend itself. Python's "batteries included"
>philosophy resulted in a more straightforward and (mostly) better
>documented way to do it.
>
>Intellectually, I prefer Ruby. Ruby and Smalltalk intrigue me. But the
>"pure OO" approach (my words this time) is annoying, and even at some
>point inconsistent, as I mentioned in my paragraph about 0.step(). I
>feel like Python has got the right balance where it's OO and pretty
>much fully so, but not fanatically so. And it's what I've adopted.

[snippage]

Some time ago I wrestled with the Ruby-Python claim-counterclaim to "purity"
in
http://groups.google.com/groups?hl=en&lr=&ie=UTF-8&oe=UTF-8&threadm=vug18vkm
jpiice%40corp.supernews.com&rnum=1&prev=/groups%3Fq%3D%2522Francis%2BAvila%2
522%2Bruby%26hl%3Den%26lr%3D%26ie%3DUTF-8%26oe%3DUTF-8%26selm%3Dvug18vkmjpii
ce%2540corp.supernews.com%26rnum%3D1

(Whew)

Anyway, as yet I fail to see how one can be considered more "pure" than the
other.  Ruby prefers subclassing, but this seems cultural rather than
technical.  Further, Python can be said to be more "pure", in the naive
sense that everything that's first class is an object, and more entities are
first class in Python (e.g. methods).  I don't think this is a *good*
argument, but it's not a ludicrous one, because it at the very least
illustrates that we don't know what the heck "pure" means in this context.

To me, the argument that there is a direct correspondence between "OO
purity" and "similarity to SmallTalk" begs the question, because it
presupposes that SmallTalk is pure OO.  But there's nothing about SmallTalk,
aside from the historical accident of being one of the first languages to
use objects pervasively, which suggests to me that its is the "purest" way
of doing OO.  Rather, OO is too general a concept to admit of a single
paradigm which is imitated to greater or lesser degrees in one or another
language.  The difference between Ruby and Python already illustrates that
OO does not admit of a single paradigm, because of the attribute/message
distinction.  Which is more pure?  It's like asking whether meat as food is
more pure than vegetables.

Of course, this is just my current thinking on the subject.  If someone
presents an argument that Ruby is more pure which I find compelling (Leaving
aside the old CPython wart of unsubclassable base types.), I'll certainly
repent my assessment.  But I'll still prefer Python, because using 'impure
OO' doesn't bother me one bit. ;)

--
Francis Avila



From miki.tebeka at zoran.com  Thu Jan 22 02:35:19 2004
From: miki.tebeka at zoran.com (Miki Tebeka)
Date: 21 Jan 2004 23:35:19 -0800
Subject: python said : "1, 2, 3, 6, 7, manbo !"
References: <pan.2004.01.21.20.53.18.750567@address.com>
Message-ID: <4f0a9fdb.0401212335.481c6679@posting.google.com>

Hello Rodrigo,
> >>> a = range(8)
> >>> for b in a:
> 	if b == 4:
> 		a.remove(b)
> 	else:
> 		print b
try:
a = range(8)
for b in list(a): # Iterate over a shallow copy
    if b == 4:
        a.remove(b)
    else:
        print b
0
1
2
3
5
6
7

HTH.
Miki


From not at all.com  Tue Jan 13 17:36:41 2004
From: not at all.com (G.I.L)
Date: Wed, 14 Jan 2004 00:36:41 +0200
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
Message-ID: <40047290$1@news.012.net.il>

Brandon J. Van Every wrote:
> "Brandon J. Van Every" <try_vanevery_at_mycompanyname at yahoo.com>
> wrote in message news:bsd101$c1oj1$1 at ID-207230.news.uni-berlin.de...
>> I am
>>
>> - *TENTATIVELY* -
>>
>> (operative word) undertaking the project of porting the GPL open
>> source game "Freeciv" to Python.  Freeciv is, in essence, an almost
>> straight clone of Sid Meier's Civilization II, albeit with better
>> cross-platform and multiplayer support.  www.freeciv.org
>
> Here's a postmortem.  Short version: I've canned the project.  Many
> of you will say "I told you so," but at least I almost have a VS .NET
> 2003 build to show for it.

Actually, it's you who said "told you so", since most of your stories
revolve around unfinished projects and utter failures.

Brandon, why the fuck on Earth couldn't you spend that exact amount of time
doing what you did BEFORE posting and arguing with the entire newsgroup? It
was an unbelievable waste of time, since you've managed to convice (maybe
still wrongfully) all the people that you are completely clueless.

The single most problematic issue you have is the belief that one can rely
on failures to pave the "right new way"(tm). Wrong. It can also lead to
endless new shitty ones. Listen to a .02$ piece of advice: since your
pioneering ways have been completely fruitless (at least commercially-wise),
why not concentrate on succeeding where other people normally do, and THEN
prove there's another and better way to achieve success?

I see your point in many of the issues you raised. But the only reason I
don't compare myself to you, is that I have a shitload of games to prove my
point. I've never had a major failure, so I never needed to use one to
leverage my projects. All the things I learned from, were simply bad habits,
mostly coding habits. I constantly evolve, in small steps, from one success
to another. That's how it should be. You do the math.

g




From usenet at -OBFUSCATION-joefrancia.com  Wed Jan 14 13:49:07 2004
From: usenet at -OBFUSCATION-joefrancia.com (Joe Francia)
Date: Wed, 14 Jan 2004 18:49:07 GMT
Subject: Printing to console (No Scroll)
In-Reply-To: <mailman.365.1074103229.12720.python-list@python.org>
References: <mailman.365.1074103229.12720.python-list@python.org>
Message-ID: <DagNb.5634681$Of.890685@news.easynews.com>

Totte Karlsson wrote:
> Hi,
> How can I print to the console without having it scrolling to a new line for
> each print statement?
> I want to print a count down in the console, but for each count it scrolls
> the screen (of course).
> 
>  Is there another way?
> 
> Here is the simple script for now
> 
> print "Closing window in :"
> for second in range(10):
>     time.sleep(1)
>     print `10-second` +" seconds"
> 
> thanks
> /totte

This works for me:

import time, sys
for second in range(10):
     time.sleep(1)
     sys.stdout.write(`10-second` + " seconds ")
     sys.stdout.flush()


From candiazoo at comcast.net  Fri Jan 23 13:30:06 2004
From: candiazoo at comcast.net (Zoo Keeper)
Date: Fri, 23 Jan 2004 13:30:06 -0500
Subject: Seem to be having trouble with Python/Bethon.
References: <PM0003D18B88B36E37@x1-6-00-a0-c9-e7-c3-de.ne1.client2.attbi.com>
Message-ID: <6a2dnXCsJ60-9Yzd4p2dnA@giganews.com>

No takers, eh?  :/

I can't be the only python user on BeOS...

The only thing I can think of is that I am running "bone".

Mike



From cjw at sympatico.ca  Mon Jan 26 17:56:41 2004
From: cjw at sympatico.ca (Colin J. Williams)
Date: Mon, 26 Jan 2004 17:56:41 -0500
Subject: Newbie : innerproduct function from Numarray
In-Reply-To: <bv40rm$ra$1@news.Stanford.EDU>
References: <bv40rm$ra$1@news.Stanford.EDU>
Message-ID: <40159B29.3020603@sympatico.ca>

Ohkyu Yoon wrote:
> I have two vectors that have about 2000 elements.
> I need to calculate the innerproducts of those vectors 2000 times where
> one of them cycles left(ie 1234, then 2341, then 3412, etc)
> Basically, I want to calculate A*x, where A is a left-circulant cyclic
> matrix,
> and x is a vector.
> 
> I tried it two ways.
> vector1 & vector2 are lists.
> 
> 1)
> from Numarray import innerproduct
> output = []
> temp = vector1 + vector1    # temp is twice the length of vector1
> for i in range(2000):
>      output.append(innerproduct(temp[i:(i+2000)],vector2)
> 2)
> output = []
> temp = vector1 + vector1
> for i in range(2000):
>     sum = 0
>     for j in range(2000):
>         sum += temp[i+j] * vector2[j]
>     output.append(sum)
> 
> I thought the first method using Numarray should be faster.
> But it looks like the second method is faster.
> Am I doing anything wrong?
> Do you guys know any faster way to do this?
> 
> Thank you.
> 
> 
You might consider something like the following:

# ohkyu.py a sliding cross-product
import numarray as N
_nc= N.numarraycore
_nt= N.numerictypes
import numarray.random_array.RandomArray2 as _ra


# The sliding array
a= _nc.zeros(shape= (2, 10), type= _nt.Float64)
b= _nc.arange(10, shape= (10,), type= _nt.Float64)  # data for the 
sliding array
a+= b                        # the data from b is broadcast to both rows
print a                      # to show the 'wraparound'

a.ravel()                    # the second row is appended to the first
c= _ra.random(shape= (10,))  # data for the fixed array
for i in range(10):
   z= _nc.dot(a[i:i+10], c)
   print i, z

I would be interested to know how the time compares.

Colin W.



From tiny_one at NOSPAM.comcast.net  Fri Jan  9 09:04:10 2004
From: tiny_one at NOSPAM.comcast.net (kaeli)
Date: Fri, 9 Jan 2004 08:04:10 -0600
Subject: [OT] Database reporting software
References: <btki05$7d0$1@news.freedom2surf.net>
Message-ID: <MPG.1a6870d8a51558e4989a9e@nntp.lucent.com>

In article <btki05$7d0$1 at news.freedom2surf.net>, shoot at the.moon 
enlightened us with...
> 
> I could contemplate web based or application based report generation, 
> but are there easy to use draggy-droppy report designing applications 
> around? Just the names would enable me to look them up.
> 

WebFocus. Easy to use and can export the reports as Excel, HTML, etc.
A bit pricey, but some of the best reporting software out there.
DBMSs tend to have their own reporting tools, but IMO, they aren't that 
great. 

Trust me, writing your own is not easy. Cross-tabulations (pivot tables, 
crosstabs) are common things in reports and aren't easy to write 
well/flexibly. Third party software to do reports is used by almost 
everyone.
(I wrote a small crosstab class, but it would have to be beefed up 
considerably to be flexible for general use)

More options if you Google for "database report generation" (no quotes).

-- 
--
~kaeli~
A backward poet writes... inverse.
http://www.ipwebdesign.net/wildAtHeart
http://www.ipwebdesign.net/kaelisSpace



From tismer at stackless.com  Thu Jan 29 21:36:51 2004
From: tismer at stackless.com (Christian Tismer)
Date: Fri, 30 Jan 2004 03:36:51 +0100
Subject: Update to the Stackless Pages -- thanks for so much input!
Message-ID: <4019C343.7040000@stackless.com>

Dear friends,

there have been so many changes, additions, contributions
and discussion of Stackless in the last few days, that I
did an update of the website and created new binaries as well.

There also were some kind people who sent some money via
PayPal. I would like to thank these, and encourage others
to follow their example.
Everybody is listed in the sponsors page.

There is a good chance for Stackless 3.0 for Python 2.3.3
to appear in the first days of February.

Thanks to all contributors who helped in any way!

cheers - chris  http://www.stackless.com/

-- 
Christian Tismer             :^)   <mailto:tismer at stackless.com>
Mission Impossible 5oftware  :     Have a break! Take a ride on Python's
Johannes-Niemeyer-Weg 9a     :    *Starship* http://starship.python.net/
14109 Berlin                 :     PGP key -> http://wwwkeys.pgp.net/
work +49 30 89 09 53 34  home +49 30 802 86 56  mobile +49 173 24 18 776
PGP 0x57F3BF04       9064 F4E1 D754 C2FF 1619  305B C09C 5A3B 57F3 BF04
      whom do you want to sponsor today?   http://www.stackless.com/






From dave at pythonapocrypha.com  Fri Jan  9 17:50:11 2004
From: dave at pythonapocrypha.com (Dave Brueck)
Date: Fri, 9 Jan 2004 15:50:11 -0700
Subject: OT: There's a monkey on my keyboard,
	Re: Straw poll on Python performance (was Re: Python is far from a
	top performer ...)
Message-ID: <027c01c3d702$f0aef490$6401fea9@YODA>

> Dave wrote:
> > I program in Python full-time and each spend approximately zero hours
>

I swear I can't type today. Anyway, that was supposed to be "each WEEK
spend...".





From crap at crud.com  Fri Jan 23 01:56:03 2004
From: crap at crud.com (Moosebumps)
Date: Fri, 23 Jan 2004 06:56:03 GMT
Subject: Batch commands on Windows
Message-ID: <7A3Qb.4870$AK2.3953@newssvr29.news.prodigy.com>

So, after reading some messages about os.system, and looking at the popen
stuff and trying it a bit, I still have not found a way to keep a command
window open for several commands (on Windows 2000/XP), while seeing the
normal output in a command window.  All I want to do is do what a batch file
does, but I want to actually have functions and associative arrays and all
the other niceties of python.

What's the deal with that?  I thought Python started out as a scripting
language.  And that seems like the most basic thing that a scripting
language should do.  I just want to list the commands, not deal with
capturing the output and redirecting it and all that.  It's not just because
I'm too lazy, it's because most of my co-workers don't know Python and I
want to make the transition easier and sell them on it.  This seems like an
enormous deficiency.  Does anyone know if this can be done?

If not, that's a point for perl, *gasp* : )  Which we _were_ using, but
which I object to for reasons I won't go into.

I have noticed this tendency for really good software to be deficient in
some obvious area.  Python has amazed me in many respects, but every so
often I encounter something like this which is pretty disappointing.  And
yes I have read PEP 324, but it doesn't seem to make mention anything like
this.  Another example is Perforce, which is absolutely outstanding for 99%
of things, but then you encounter some glaring hole.  Most software is just
mediocre all around.

thanks,
MB






From haim at babysnakes.org  Sun Jan 18 11:05:08 2004
From: haim at babysnakes.org (Haim Ashkenazi)
Date: Sun, 18 Jan 2004 18:05:08 +0200
Subject: newbie question about compression and ascii
Message-ID: <buearm$75n$1@sea.gmane.org>

Hi

I'm a real newbie, so sorry if this is a trivial question.

I'm writing a script that collect a list of files and creates a zipfile from
these files. when running it on linux everything works fine, but when I'm
running it on windows I get this error when running the command:

myZip.write(file)

UnicodeDecodeError: 'ascii' codec can't decode byte 0xa8 in position 10:
ordinal not in range(128)

the file variable contains: u'C:\\Document and Settings\\haim\etc...'.

is there a way to solve this?

thanx
--
Haim




From googlegroups at thuswise.com  Mon Jan  5 10:22:30 2004
From: googlegroups at thuswise.com (Dave)
Date: 5 Jan 2004 07:22:30 -0800
Subject: Python for Embedded Devices?
References: <efa6f675.0401021920.3bffced0@posting.google.com>
	<vvdl0nbogvm74@corp.supernews.com>
	<221e7b06.0401041537.2896b22d@posting.google.com>
	<4f0a9fdb.0401042307.1f6bd4e8@posting.google.com>
	<btb918$f61$1@newsreader.mailgate.org>
Message-ID: <33b7435c.0401050722.3b01a3d0@posting.google.com>

What about cases where the OS shields you from porting issues?

This is a question which interests me at the moment, as I'm
considering some future embedded work.

Python is available as a package for NetBSD. To what extent
does this mean that, if you can install NetBSD, you can run
a Python interpreter?

http://www.netbsd.org celebrates the fact that it targets
SBCs and some handheld devices.

Has anyone out there any experience of Python on NetBSD on embedded platforms?

Here's hoping,

Dave.


From mwh at python.net  Wed Jan 14 06:29:56 2004
From: mwh at python.net (Michael Hudson)
Date: Wed, 14 Jan 2004 11:29:56 GMT
Subject: Division oddity
References: <ssn3009029rrug3l8dk1pn06tqd019ucld@4ax.com>
	<7xeku5vrn8.fsf@ruckus.brouhaha.com>
	<cdm7005r12o3o3f6gngj8no1qh74ul3733@4ax.com>
	<400413E0.5C691A56@engcorp.com>
	<7xr7y3mzsl.fsf@ruckus.brouhaha.com>
	<400444A0.717BA7A3@engcorp.com>
	<7xk73vzlen.fsf@ruckus.brouhaha.com>
Message-ID: <m3zncqwyx7.fsf@pc150.maths.bris.ac.uk>

Paul Rubin <http://phr.cx at NOSPAM.invalid> writes:

> Peter Hansen <peter at engcorp.com> writes:
> > > Python has no support for macros or aliases, and it would be silly
> > > to add some special kludge for input().  The user needs to be able
> > > to redefine the function and so forth too.
> > 
> > Sure it does:
> > 
> > def input(*args):
> >     return eval(raw_input(*args))
> 
> For it to be an alias, that definition would have to be injected into
> the module that input is actually called from, not run in a separate
> module.

The problem with doing things this way is that it's not easy to get
Python-defined functions into an extension module.  Nothing deep.

> How the heck does input get at the environment of its caller, anyway?
> Through the frame object chain?  

Yes.  The function you are seeking is called
PyEval_MergeCompilerFlags.

> I guess the obvious fix is for the future division flag to be part of
> the environment, so evaling in the caller environment is done according
> to the flag.  

I'm not sure what you mean here.  eval() already respects future
division, as does execfile() and compile().  input() just got
overlooked when this stuff got added (back in the 2.1 era for nested
scopes, though the details have changed intermittently over the
intervening vwersions).

> Someone has already checked a fix into sourceforge, but I haven't
> looked at it and don't know if it works that way or some other way.

Wouldn't checking have taken about as much time as writing the above
post?  It's a very simple patch...

Cheers,
mwh

-- 
  All obscurity will buy you is time enough to contract venereal
  diseases.                                  -- Tim Peters, python-dev


From Pieter.Claerhout at Creo.com  Wed Jan 28 05:44:30 2004
From: Pieter.Claerhout at Creo.com (Pieter Claerhout)
Date: Wed, 28 Jan 2004 11:44:30 +0100
Subject: Cross-version extension modules?
Message-ID: <490316A24CC5D411ACD700B0D078F7F003915E2A@cseexch01.cse.creoscitex.com>

Normally, it doesn't change between micro versions.

pieter

Creo
pieter claerhout | product support prinergy | tel: +32 2 352 2511 |
pieter.claerhout at creo.com | www.creo.com

IMAGINE CREATE BELIEVE(tm)


-----Original Message-----
From: Peter Astrand [mailto:peter at cendio.se] 
Sent: 28 January 2004 11:43
To: python-list at python.org
Subject: RE: Cross-version extension modules?


On Wed, 28 Jan 2004, Pieter Claerhout wrote:

> extension modules in Python are always linked to a specific version of
> Python. You might perform some tricks with writing a pure Python module
> about your extension that, based on the version of the python interpreter,
> loads a different version of your extension. This is e.g. the way the
Python
> drivers for SapDB work.

Thanks. Is PYTHON_API_VERSION guaranteed to increase only when the Python 
major or minor version increases, or can it change between micro versions 
as well?


/Peter
> -----Original Message-----
> From: Peter Astrand [mailto:peter at cendio.se] 
> Sent: 28 January 2004 10:40
> To: python-list at python.org
> Subject: Cross-version extension modules?
> 
> 
> 
> If I build a extension module with Python 2.2 and then loads it with 2.3, 
> I get:
> 
> RuntimeWarning: Python C API version mismatch for module _foo: This
> Python has API version 1012, module _foo has version 1011.
> 
> How fatal is this? Is it safe to use the module anyway? If not, is it
> possible to build the module differently, so that it actually is safe to
> use it with different versions of Python?
> 
> 

-- 
Peter ?strand		www.thinlinc.com
Cendio			www.cendio.se
Teknikringen 3		Phone: +46-13-21 46 00
583 30 Link?ping


-- 
http://mail.python.org/mailman/listinfo/python-list



From NAVMSE-SRV003 at techblu.com  Thu Jan 29 08:35:58 2004
From: NAVMSE-SRV003 at techblu.com (Anti Virus Administrator)
Date: Thu, 29 Jan 2004 05:35:58 -0800
Subject: Norton AntiVirus detected and quarantined a virus in a message you
	sent.
Message-ID: <D493D373CEB0C2498D6CB2D629D30DFE49351E@srv003.staa.com>

Recipient of the infected attachment:  SRV003, First Storage
Group\Mailbox Store (SRV003), Dennis Lacar/Inbox/Employment
Subject of the message:  ERROR
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From mcfletch at rogers.com  Mon Jan  5 16:05:26 2004
From: mcfletch at rogers.com (Mike C. Fletcher)
Date: Mon, 05 Jan 2004 16:05:26 -0500
Subject: PRE-PEP: new Path class
In-Reply-To: <vvj881re348u0c@news.supernews.com>
References: <vvivefh35qjv9a@news.supernews.com>	<just-CC8B2B.17325205012004@news1.news.xs4all.nl>
	<vvj881re348u0c@news.supernews.com>
Message-ID: <3FF9D196.9060402@rogers.com>

John Roth wrote:

>"Just" <just at xs4all.nl> wrote in message
>news:just-CC8B2B.17325205012004 at news1.news.xs4all.nl...
>  
>
>>In article <vvivefh35qjv9a at news.supernews.com>,
>> "John Roth" <newsgroups at jhrothjr.com> wrote:
>>    
>>
...

>>>15. Should files and directories be the same
>>>class.
>>>
>>>Probably not. While they share a lot of common
>>>functionality (which should be spelled out as an
>>>interface) they also have a lot of dissimilar
>>>functionality. Separating them also makes it easy
>>>to create objects for things like symbolic links.
>>>      
>>>
>>But what about paths for not-yet-existing files of folders? I don't
>>think you should actually _hit_ the file system, if all you're doing is
>>path.join().
>>    
>>
>
>I agree here. I haven't looked at any of the candidate implementations
>yet, so I don't know what they're doing. I'm thinking of a
>three class structure: the parent class is just the path manipulations;
>it has two subclasses, one for real files and one for real directories.
>That way they can not only inherit all of the common path manipulation
>stuff, but the developer can instantiate a pure path manipulation
>class as well.
>
>There might also be a mixin that encapsulates the stuff that's common
>to real files and directories like accessing and changing dates and
>permissions.
>
>I'm sure there are use cases that will throw a curve at that structure
>as well.
>  
>
My implementation combines the two into a single class.  Here's the logic:

    * There is no necessary distinction between files and directories at
      the path level
          o Particularly with upcoming ReiserFS 4, where structured
            storage shows up, it's possible to have files behaving much
            like directories.
          o Zip files also come to mind if we have virtual file system
            support eventually
    * These objects represent paths, not the things pointed to by the paths.
          o They allow you to operate on the path, which is "almost" the
            filesystem, but not quite. 
          o In the space of "paths", there's no distinction between a
            file and a directory, really.
          o Even a path that traverses a few symbolic links, and drops
            into a zip-file is still just a path, it's a way of
            specifying something, similar to a "name" or "location" class.
          o You can find out what the path-object points to via the path
            methods, but the path itself isn't those objects.
    * Don't want to have to explicitly cast your paths to file/directory
      to get the basic file/directory operations when joining paths.
          o Mix-ins require changing the class of the instance by
            somehow figuring out that it's a file, that requires a
            file-system access (to what may be a non-existent or very
            expensive-to-access file).
          o There's not much of a conflict between the file/directory
            path operations

Enjoy,
Mike

_______________________________________
  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://members.rogers.com/mcfletch/






From salgado at freeshell.org  Sun Jan 25 10:13:48 2004
From: salgado at freeshell.org (Guilherme Salgado)
Date: Sun, 25 Jan 2004 13:13:48 -0200
Subject: trouble w/ unicode file
In-Reply-To: <bv007p$2ged$1@nadya.doma>
References: <mailman.752.1074995324.12720.python-list@python.org>
	<bv007p$2ged$1@nadya.doma>
Message-ID: <1075043628.18837.17.camel@maluf.alcatraz>

On Sun, 2004-01-25 at 06:54, Serge Orlov wrote:
> "Guilherme Salgado" <salgado at freeshell.org> wrote in message news:mailman.752.1074995324.12720.python-list at python.org...
> > Hi there,
> >
> > I have a python source file encoded in unicode(utf-8) with some
> > iso8859-1 strings. I've encoded this file as utf-8 in the hope that
> > python will understand these strings as unicode (<type 'unicode'>)
> > strings whithout the need to use unicode() or u"" on these strings. But
> > this didn't happen.
> 
> You hoped, but you forgot to pray <wink> Why do you think Python
> should behave this way? There is (an experimental?) option -U that

Ok, ok. I'll remember to pray next time. :-)
I need to store unicode strings(declared in files) in ZODB, but i don't
want to use u"" around all my strings (cause most of them are latin-1),
so i think storing the file as unicode will work. Is there a better way
for doing this?

> forces all string literals to be unicode. Obviously if you use this option
> your sources won't be easily distributable to other people
> 
[...]
> 
> > Am I expecting something that really shoudn't happen or we have a bug?
> 
> We have a bug here as well. But in your code. The coding must
> be the same as the coding of your source file. bar.py must be:
> #-*- coding: latin-1 -*-
> x = '????????????'
> print x, type(x)
> 

I didn't understand this (even after some pray) :-)
My file is encoded in utf-8, look:
$ file bar.py
bar.py: UTF-8 Unicode text

Why should i declare it as latin1 encoded though?

[]'s
Guilherme Salgado

-- 
This email has been inspected by Hans Blix, who has reported that no
weapons of mass destruction were used in its construction. 
Read his report here:
<http://www.un.org/apps/news/infocusnewsiraq.asp?NewsID=414&sID=6>




From michael at foord.net  Fri Jan 16 03:44:32 2004
From: michael at foord.net (Fuzzyman)
Date: 16 Jan 2004 00:44:32 -0800
Subject: working on multiple files in IDLE
References: <ceJNb.1610$Z6.646@newssvr29.news.prodigy.com>
Message-ID: <8089854e.0401160044.647e8021@posting.google.com>

"Moosebumps" <crap at crud.com> wrote in message news:<ceJNb.1610$Z6.646 at newssvr29.news.prodigy.com>...
> So say I am working on two separate .py files in IDLE that are part of the
> same program.  Does anyone have problems where when you modify one file, and
> then run the other, the changes you made in the first aren't updated?
> 
> I usually just close all the files, and restart IDLE, but this is a pain.
> Maybe because I always use right click -> edit with IDLE (on Windows).  That
> starts up a separate Python Shell too, which I always close.
> 
> MB

The latest version of IDLE was *supposed* to fix this by restarting
the IDLE session when you run the script.
Unfortunately they didn't get it working on the windows version
because it uses the same socket when you run multiple
versions......... The result is that IDLE is virtually unuseable for
serious work on windows... :-(

There *is* a way round it...... If you edit your file association for
.py and .pyw files (from an explorer window menu select tools and
folder options - then choose file types). Remove the -n from the
command line that IDLE is launched with.. this allows IDLE to be
launched with a subprocess... *HOWEVER* if you do this you can only
open one version of IDLE at a time the second and third
modules/scripts that you edit must be opened using the 'open' or 'open
module' option..... If a second shell window opens it will
hang.........

I have two file associations - one 'Edit with IDLE Subprocess' and one
'Edit with IDLE No Subprocess'... the two co-exist quite happily even
when run simultaneously...........


For files edited on IDLE *with* a subprocess - it will restart the
session whenever you run the script...... which re-imports all the
modules and therefore includes your changes..... bit of a bodge
though....

Fuzzy


From google at axiomatize.com  Thu Jan 15 17:24:54 2004
From: google at axiomatize.com (Laurent Therond)
Date: 15 Jan 2004 14:24:54 -0800
Subject: Binary strings, unicode and encodings
References: <265368cb.0401151138.37a3a47b@posting.google.com>
	<4006F13C.7D432B98@engcorp.com>
Message-ID: <265368cb.0401151424.3cd7ede6@posting.google.com>

I forgot to ask something else...

If a client and a server run on locales/platforms that use different
encodings, they are bound to wrongly interpret string bytes. Correct?


From none at none.com  Mon Jan 12 12:34:37 2004
From: none at none.com (Derek)
Date: Mon, 12 Jan 2004 12:34:37 -0500
Subject: Why learn Python ??
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<btubno$bd8k6$1@ID-46268.news.uni-berlin.de>
	<tyf1xq5fbdb.fsf@pcepsft001.cern.ch>
Message-ID: <btulre$bjclv$1@ID-46268.news.uni-berlin.de>

"Jacek Generowicz" wrote:
>
> > I would also add that while Lisp has been a favorite in
> > the AI community, you will find that most AI techniques
> > generalize to most any programming language.  I spent
> > a good deal of time in grad school and on my first job
> > doing AI programming in C++.  The only time I used Lisp
> > was in introductory classes, mostly to write elegant -- 
> > but toy -- programs.
>
> Lest Derek give the impression that Lisp is in any way a
> "toy" language, or that it somehow sacrifices practicality
> for elegance, I feel honour bound to point out that it
> is actually the most powerful and expressive programming
> language known to man, and excells in solving problems
> which are often considered too hard to be solved in other
> languages.

I meant no disrespect to Lisp.  My intention was only to point out
that it's quite possible to carry out AI programming in other
languages, albeit less miraculously. :)





From aaron at reportlab.com  Mon Jan 12 09:58:28 2004
From: aaron at reportlab.com (Aaron Watters)
Date: 12 Jan 2004 06:58:28 -0800
Subject: Databases: Which one's right for me?
References: <mailman.285.1073872919.12720.python-list@python.org>
Message-ID: <9a6d7d9d.0401120658.5b9ee522@posting.google.com>

"Tim Peters" <tim.one at comcast.net> wrote in message news:<mailman.285.1073872919.12720.python-list at python.org>...
> [Aaron Watters]
> > Does zodb support the strictest isolation levels?
>
> I'm almost certain it doesn't, but I'm not a DB expert.  Please take this to
> a ZODB list, as previously suggested.
> 
> > If so how?  If not what does it support exactly?
> 
> I pointed you to Jeremy's relevant blog entry last time...

Reading the blog it seems you are right.  I wish zodb would be
a bit more careful in its claims.  When you say "zodb supports
the ACID properties of transactions" this has a precise meaning
which vanishes when you redefine all the letters.  In particular
it suggests that zodb would be good for something like an
accounting or banking application which would require strict
transaction isolation (serializability).  The looser definition
could lead to fairly unpleasant difficulties (law suits, jail time...).
Sorry, had to complete my thought on clp.

   -- Aaron Watters
===
so you better start swimming or you'll sink like a stone
for the times, they are a-changing.   --Dylan


From Johan.Vervoort at utimaco.be  Wed Jan 21 11:18:07 2004
From: Johan.Vervoort at utimaco.be (Johan.Vervoort at utimaco.be)
Date: Wed, 21 Jan 2004 16:18:07 GMT
Subject: Reading BLOB
References: <400e3510.18785312@news.eunet.be> <400E8AB0.9D4DEB79@engcorp.com>
Message-ID: <400ea2c0.46864796@news.eunet.be>

This is the sample code: It should dump all the certificates to the
certs directory...
What I suspect is that python thinks that the certif field is a STRING
and it's truncated when the first '\0' occurs...
(The data is stored completely in the database as an equivalent
C-program works fine...)

Sample output:
>>> reload (Test)
[('csernum', 'STRING', 80, 80, 0, 0, 0), ('certif', 'STRING', 0,
2147483647, 0, 0, 0)]
csernum
certif


import dbi, odbc

def ReadCmail():
    result = { 'Result' : 'OK' } 

    # Microsoft Visual FoxPro ODBC DNS
    # Database type: Free table directory
    dbc = odbc.odbc('CEC')
    cursor = dbc.cursor() 
    query = "SELECT CSERNUM,CERTIF FROM C_MAIL"
    cursor.execute(query)
    
    row = cursor.fetchone()
    for row in iter(cursor.fetchone, None):
        # Dump certif to file
        FileName="C:\\CERTS\\%s.crt" % row[0]
        CertFile = open(FileName, "wb")
        CertFile.write(row[1])
        CertFile.close()

    print cursor.description
    for tup in cursor.description:
            print tup[0]
            
    cursor.close()
    dbc.close()
    return result

ReadCmail()



On Wed, 21 Jan 2004 09:20:32 -0500, Peter Hansen <peter at engcorp.com>
wrote:

>Johan Vervoort wrote:
>> 
>> How can I read a binary value from a blob via ODBC (Microsoft VFP
>> driver-win32all)? The value seems to be truncated at the first '\0'
>
>Maybe posting a very small snippet of code which reproduces the
>problem would help get you responses.  I can't help, as I don't
>know what VFP driver-win32all is, but if there was example code I
>might be able to see the problem anyway, and others more expert in
>this area would likely see the problem right away.
>
>-Peter



From jepler at unpythonic.net  Sat Jan 17 18:28:48 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Sat, 17 Jan 2004 17:28:48 -0600
Subject: rfc822.py date parsing problem
In-Reply-To: <41886.207.172.179.21.1074381320.squirrel@li4-142.members.linode.com>
References: <41886.207.172.179.21.1074381320.squirrel@li4-142.members.linode.com>
Message-ID: <20040117232848.GB23442@unpythonic.net>

Probably some message has an invalid date in a header.  In 2.2, I can
get that exception by passing an invalid string to parsedate_tz:
>>> import rfc822
>>> rfc822.parsedate_tz(" ")
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "/usr/lib/python2.2/rfc822.py", line 861, in parsedate_tz
    if data[0][-1] in (',', '.') or data[0].lower() in _daynames:
IndexError: list index out of range

guess_delivery_time() should probably recover from this exception, but I
don't know what exactly would be appropriate.

Jeff



From jacek.generowicz at cern.ch  Tue Jan 13 04:05:14 2004
From: jacek.generowicz at cern.ch (Jacek Generowicz)
Date: 13 Jan 2004 10:05:14 +0100
Subject: Why learn Python ??
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<btubno$bd8k6$1@ID-46268.news.uni-berlin.de>
	<tyf1xq5fbdb.fsf@pcepsft001.cern.ch> <87hdz0g2zk.fsf@pobox.com>
Message-ID: <tyfwu7wdxrp.fsf@pcepsft001.cern.ch>

jjl at pobox.com (John J. Lee) writes:

> Jacek Generowicz <jacek.generowicz at cern.ch> writes:
> [...]
> > If you want to perform miracles, then learn Lisp. If you
> > merely want to write programs that rock, then learn Python.
> [...]
> 
> ...and then somebody argues that macros aren't a programming language
> feature, but a harmful means of inventing new languages, and then we
> get into that endless macro thread again...

Well they're all Nazis.


From tim.golden at viacom-outdoor.co.uk  Wed Jan 21 04:49:19 2004
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Wed, 21 Jan 2004 09:49:19 -0000
Subject: CD Insert Notification in WinXP
Message-ID: <F1921F85572CB04D9F55B14BDC76B3E4434635@tdi_nt9.internal.viacom-outdoor.co.uk>

>Hi,
>
>I'm using Python 2.3 on a Win XP box, and I'm trying to find 
>if there's 
>a library of some sort that will give you a callback (or something 
>comparable) when a new disc is inserted into a CD Rom drive. 
>I've done a 
>little googling and nothing's come up, so I'm not holding my breath. :)
>

Initial response, prior to further investigation: use PyGame
(http://pygame.org).
It's quite lightweight and gives you a lot of control. It doesn't, as far as
I
 know, give you a call back, but its CD object gives you an is_empty
function
 which you could poll as and when. Check out
http://pygame.org/docs/ref/CD.html

Don't be put off by the "gamey" nature of the toolkit. I've used it here
for several apps, because of the degree of control it gives. I haven't
used the CD lib, admittedly, except to play around with, but you can
import what you need and leave the rest.

TJG


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From alanmk at hotmail.com  Mon Jan 19 07:02:33 2004
From: alanmk at hotmail.com (Alan Kennedy)
Date: Mon, 19 Jan 2004 12:02:33 +0000
Subject: Suggested generator to add to threading module.
References: <7934d084.0401152058.164a240c@posting.google.com>
	<bu998t$o62$1@panix1.panix.com>
	<7934d084.0401181808.6e698042@posting.google.com>
Message-ID: <400BC759.72FE1FF2@hotmail.com>

[Andrae Muys]
> I'm curious to know how a Queue.Queue() provides the same
> functionality?  I have always considered a Queue.Queue() to be an
> inter-thread communcation primitive.  

Not exactly.

Queue.Queue is a *thread-safe* communication primitive: you're not
required to have seperate threads at both ends of a Queue.Queue, but
it is guaranteed to work correctly if you do have multiple threads.

>From the module documentation

"""
The Queue module implements a multi-producer, multi-consumer FIFO
queue. It is especially useful in threads programming when information
must be exchanged safely between multiple threads. The Queue class in
this module implements all the required locking semantics. It depends
on the availability of thread support in Python. 
"""

http://www.python.org/doc/current/lib/module-Queue.html

> serialise() (at least the
> corrected version discussed later in this thread) is strictly a
> synchronisation primitive.

Just as Queue.Queue is a synchronisation primitive: a very flexible
and useful primitive that happens to be usable in a host of different
scenarios.

I think I'm with Aahz on this one: when faced with this kind of
problem, I think it is best to use a tried and tested inter-thread
communication paradigm, such as Queue.Queue. In this case, Queue.Queue
fits the problem (which is just a variation of the producer/consumer
problem) naturally. Also, I doubt very much if there is much excessive
resource overhead when using Queue.Queues.

As you've already seen from your first cut of the code, writing
thread-safe code is an error-prone process, and it's sometimes
difficult to figure out all the possibile calling combinations when
multiple threads are involved.

But if you'd used Queue.Queue, well this whole conversation would
never have come up, would it ;-)

regards,

-- 
alan kennedy
------------------------------------------------------
check http headers here: http://xhaus.com/headers
email alan:              http://xhaus.com/contact/alan


From rodrigob at elo.utfsm.cl  Tue Jan 27 09:24:46 2004
From: rodrigob at elo.utfsm.cl (Rodrigo Benenson)
Date: Tue, 27 Jan 2004 11:24:46 -0300
Subject: names proposals => Searching a name for a new program
References: <40153d2a_2@nova.entelchile.net>
Message-ID: <401670d4$1_2@nova.entelchile.net>

(repeated the message with the hope it get out my local ISP news server)

Hi,

I'm finishing an open source crossplatform pure python collaborative text
edition software, similar to SubEthaEdit. Essencially it is a stripped down
version of LeoN (take a look at http://ryalias.freezope.org/souvenirs/leon)

Actually I'm searching a names for such software. I would like to have a
descriptive name, not things like 'yasu' (yet another sofware unamed),
etc...

My first idea was MultiEdit, but that name was already took.

So now I have in my list:

PluriPen
Chalks
Quills
PluriQuills
PluriChalk

'Chalks' is my favourite, but I think it can be done better.
Any sugestion ?

RodrigoB.






From Z_kline at hotmail.com  Sun Jan 25 21:18:22 2004
From: Z_kline at hotmail.com (Zachary)
Date: Sun, 25 Jan 2004 18:18:22 -0800
Subject: Guardian: open source is a throwback says Jack Schofield
References: <64cff82f.0401251143.328388bd@posting.google.com>
	<mailman.772.1075066543.12720.python-list@python.org>
	<bv1jkf$g46$1@namru.matavnet.hu>
	<bv1pgj$ctl$3@news.service.uci.edu>
Message-ID: <bv1tda$n8j1s$1@ID-221199.news.uni-berlin.de>


"Josiah Carlson" <jcarlson at nospam.uci.edu> wrote in message
news:bv1pgj$ctl$3 at news.service.uci.edu...
>
> > Either that or Microsoft. ;-)  Or he's plain stupid.
> >
> > Mikl?s
>
> Never underestimate the power of stupidity (or ignorance, or denial,
or...).
>
> Speaking of which...
> http://www.whitehouse.gov/news/releases/2004/01/20040122-5.html
>
>   - Josiah
Amazing!  I didn't know he could completely miss the point so much.




From ajsiegel at optonline.com  Thu Jan 22 20:46:48 2004
From: ajsiegel at optonline.com (Arthur)
Date: Fri, 23 Jan 2004 01:46:48 GMT
Subject: [Numpy-discussion] Status of Numeric
References: <CEELJPECNGEGKFNDLHFFGEBKCCAA.perry@stsci.edu>	<mailman.533.1074574795.12720.python-list@python.org>	<bumghc$dsb$1@nrc-news.nrc.ca>
	<vpmt0058gq2hj2q8jh8pakm9d80eridvmv@4ax.com>
	<mailman.617.1074727375.12720.python-list@python.org>
	<8g7u001k257pr6tjl3ng9t7pn3gvbq2328@4ax.com>
	<400fe3c5$0$3036$61fed72c@news.rcn.com>
Message-ID: <rpq010t3ailk8hechlo40hv595pspeuola@4ax.com>

On Thu, 22 Jan 2004 09:48:46 -0500, "Edward C. Jones"
<edcjones at erols.com> wrote:

>Arthur wrote:

>> 
>> Couldn't one argue that - for example - in 3d graphic applications the
>> performance as to short arrays is crucial.
>
>In some numerical / graphing packages, there are specialized, fast, 
>fixed-size arrays for sizes less than 4 by 4.

The problem is having at one's disposal all the other good shit
functionality - technical term - that something like Numeric brings to
the table for operating on arrays.  

At least in how I have used it, where the 3d drawing might in fact
boil down to a short one-dimensionall vector, but the computations
that get me to the content of that vector might involve something
quite more than that.

Certainly I don't deal in 2000 element arrays, but on the other hand
the standard graphics matrix library doesn't quite cut it either .
Numeric has been quite the perfect thing.

I think this must be true for a wide assortment of visualization
applications.

Art  


From francisgavila at yahoo.com  Fri Jan  9 16:09:43 2004
From: francisgavila at yahoo.com (Francis Avila)
Date: Fri, 9 Jan 2004 16:09:43 -0500
Subject: Variable Scope 2 -- Thanks for 1.
References: <dcde6f.0401091247.c17b76e@posting.google.com>
Message-ID: <vvu66gj8i1et06@corp.supernews.com>

Jens Thiede wrote in message ...
>I found the querk in my code:
>
>a = [1, 2, 3];
>b = a;
>b.append(4);
>
>b == [1, 2, 3, 4]; # As it should.
>a == [1, 2, 3, 4]; # - Why?
>
>One would think that b is a referance to a - however I know it's not.

Ordinarily I would write a big custom-made explaination complete with
examples.  However:

http://starship.python.net/crew/mwh/hacks/objectthink.html

This is good enough.

--
Francis Avila



From loic at yermat.net1.nerim.net  Tue Jan 20 15:53:27 2004
From: loic at yermat.net1.nerim.net (Yermat)
Date: Tue, 20 Jan 2004 21:53:27 +0100
Subject: an example of a singleton design pattern in python?
In-Reply-To: <hc63caapdui.fsf@praxis.lsil.com>
References: <hc63caapdui.fsf@praxis.lsil.com>
Message-ID: <buk4g0$ine$1@biggoron.nerim.net>

Daniel Ortmann a ?crit :

> Hello,
> 
> Does anyone have an example of a singleton design pattern in python?
> 
> Thanks!
> 

http://www.python.org/cgi-bin/moinmoin/SingletonProgramming
Look for links too on page : 
http://www.python.org/cgi-bin/moinmoin/PatternProgramming

Hope it will help !
Yermat



From zorlord at zorlord.karoo.co.uk  Tue Jan  6 04:36:47 2004
From: zorlord at zorlord.karoo.co.uk (greg)
Date: Tue, 6 Jan 2004 09:36:47 -0000
Subject: Probles parsing a text file
References: <LoOdnYV4RNhliWeiSa8jmw@karoo.co.uk>
	<4f0a9fdb.0401052354.549cece4@posting.google.com>
Message-ID: <YaOdnX2KZ74CHGeiSa8jmA@karoo.co.uk>

thanks Miki.

what would you suggest
somthing like
if line[:8] == "setVar1":
    #do somthing
elif line[:8] == "setVar2":
    #do somthing else
but this would be extreamly slow if there server.cfg has many directives in
it
then when the last directive is found (eg: setVar117) and this is the 116th
elif
then it will have to check through
if line[:8] == "setVar1":
    #do somthing
elif line[:8] == "setVar2":
    #do somthing else
elif line[:8] == "setVar3":
    #do somthing
elif line[:8] == "setVar4":
    #do somthing else
elif line[:8] == "setVar5":
    #do somthing
...............
..........
.....
elif line[:8] == "setVar117":
    #execute code for 117

what do you think

"Miki Tebeka" <miki.tebeka at zoran.com> wrote in message
news:4f0a9fdb.0401052354.549cece4 at posting.google.com...
> Hello,
>
> > heres my text file(well the first two lines of it)
> >
> > #########################################
> > #            Default BMUS server CFG file                   #
> ...
> > i heres the script that im using to parse the file
> ...
> Try:
> #!/usr/bin/env python
> try:
>     fo = open("server.cfg")
>     print "Reading server CFG file"
>     for line in fo:
>         line = line.strip() # Strip white spaces
>         if (not line) or line.startswith("#"):
>             continue
>         eval(line) # *** UNSAFE ***
>         print "line executed"
> except IOError, e:
>     print "Can't read server CFG (%s)" % e
>
> Note that using "eval" is very unsafe. Someone might place
> 'shutil.rmtree("/")' inside the CFG file.
>
> > many thnas for your help
> No problem.
>
> Miki




From newz at rekon.org.NOSPAM  Sat Jan 17 18:15:01 2004
From: newz at rekon.org.NOSPAM (Wil Schultz)
Date: Sat, 17 Jan 2004 15:15:01 -0800
Subject: Best way to do this?
Message-ID: <100jg9er3qak890@corp.supernews.com>

I am reading the "Non-Programmers Tutorial For Python" by Josh Cogliati
http://www.honors.montana.edu/~jjc/easytut/easytut/easytut.html

One of the exercises asks for a program to ask for a password three 
times. Surprisingly this took me much longer that it probably should 
have so I am curious if the following is the easiest way this is done. 
Thanks much!

*************************************************
#!/usr/local/bin/python

count = 0
password = "null"

while count < 3:
         count = count + 1
         password = raw_input("what's the pass: ")
         if password == "mypass":
                 print "Access Granted"
                 count = 3
         else:
                 if count < 3:
                         print "Try Again"
                 else:
                         print "Too Bad"
*************************************************
-- 
Wil
my 2?
"When everything seems to be going well, you have obviously overlooked
something."


From mcfletch at rogers.com  Wed Jan 28 15:56:02 2004
From: mcfletch at rogers.com (Mike C. Fletcher)
Date: Wed, 28 Jan 2004 15:56:02 -0500
Subject: C API: how to tell if x is a new style instance?
In-Reply-To: <20040128184040.GD11485@foof.i3.cz>
References: <20040128184040.GD11485@foof.i3.cz>
Message-ID: <401821E2.1070106@rogers.com>

Well, I don't actually know how to check for the spiritual state of a 
new-style class, but here's how to tell if an instance is an instance of 
a new-style class:

    * Note that a new-style class is a sub-class of type, while
      old-style classes are not
    * Check if isinstance( instance.__class__, type )
    * <Insert mystical spiritual damnedness check here>

HTH,
Mike

Michal Vitecek wrote:

> hello everyone,
>
> i've tried to find a way to determine in the python C-API if x is an
> instance of a (damned) new style class, but failed :/
>
> can someone please tell me how this could be accomplished?
>
>        thank you,
>  
>
_______________________________________
  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://members.rogers.com/mcfletch/





From nhodgson at bigpond.net.au  Sun Jan 18 06:51:23 2004
From: nhodgson at bigpond.net.au (Neil Hodgson)
Date: Sun, 18 Jan 2004 11:51:23 GMT
Subject: Retrive unicode keys from the registry
References: <brp3bzwj.fsf@python.net>
	<KSXNb.15179$Wa.2061@news-server.bigpond.net.au>
	<1xpzaa8i.fsf@python.net>
	<69ZNb.15222$Wa.2798@news-server.bigpond.net.au>
	<40086EE5.7020708@v.loewis.de>
	<j7jOb.16549$Wa.4760@news-server.bigpond.net.au>
	<bucl20$qo3$03$1@news.t-online.com>
Message-ID: <%quOb.17356$Wa.7471@news-server.bigpond.net.au>

Martin v. L?wis:

> Too bad. Perhaps we should link Python with MSLU?

   I don't have any experience with it and fear it would introduce a new
class of bug where the wide API is incompletely supported.

   Neil




From a.schmolck at gmx.net  Wed Jan 21 15:57:53 2004
From: a.schmolck at gmx.net (A.Schmolck)
Date: 21 Jan 2004 20:57:53 +0000
Subject: Need help with Python class idioms
References: <f5c5dc88.0401211243.7e81a26b@posting.google.com>
Message-ID: <yfsfze958a6.fsf@black132.ex.ac.uk>

tad at tadland.net (Tad Marko) writes:
> Can anyone suggest a more Pythony way to do the following?
> 
> Thanks,
> Tad
> 
> #!/bin/env python
> 
> class A:
>     def __init__(self):
>         self.mandatoryVar1 = None
>         self.mandatoryVar2 = None
> 
>     def setMV1(self, mv1):
>         self.mandatoryVar1 = mv1
> 
>     def setMV2(self, mv2):
>         self.mandatoryVar2 = mv2
> 
>     def saveToDB(self, db):
>         if self.mandatoryVar1 == None:
>             raise Exception, "Mandatory Var 1 not set."
>         if self.mandatoryVar2 == None:
>             raise Exception, "Mandatory Var 2 not set."
> 
>         # Using db, do whatever saving stuff is needed.

class A(object):              
      def saveToDB(self, db):
          # Using db, do whatever saving stuff is needed.

'as


From paul at fxtech.com  Thu Jan 22 09:46:04 2004
From: paul at fxtech.com (Paul Miller)
Date: Thu, 22 Jan 2004 08:46:04 -0600
Subject: Looking for advice: supporting multiple embedded interpreters
Message-ID: <6.0.1.1.2.20040122084447.02f56ec0@mail.fxtech.com>

Some background first - we have some software that embeds a Python 
interpreter into a host application. Scripts are loaded dynamically and 
used. But we want to support the ability to edit scripts while the app is 
running. This means we have to "unload" the script and cause a reload. 
Normal module reloading tricks don't work because if you try to reimport a 
script that imports another script, and if the nested script is changed, it 
might not be reloaded itself. Also, we have 2 parts of the software, each 
using Python for its own set of scripts. We don't want scripts loaded into 
each parts to "see" scripts loaded into the other part. Ideally, we would 
like multiple "instances" of a Python interpreter to manage this.

So, for Python 2.2, I came up with a system that works. When we need a new 
self-contained Python interpreter, I use Py_NewInterpreter(), swap it in 
using PyThreadState_Swap, load my built in modules, and swap it back out. 
When I need to run some code in that interpreter, I swap it back in, load 
the module I need, call methods in it, and swap it back out. When I'm done 
with the interpreter, I swap it back in and call Py_EndInterpreter.

When I want to force a reload of all the script code in a given 
interpreter, I just delete the interpreter, create a new one, and load the 
scripts into that one. This has worked flawlessly. And each "part" of my 
application can use a different interpreter without modules and globals in 
each one interfering with the other.

Now, with Python 2.3, this code doesn't seem to work anymore. Someone told 
me it is likely because of the extensive rewrite of GUSI or whatnot. It is 
important to note that I'm NOT really doing any threading. I just was 
self-contained interpreters for the above reasons.

What I am wondering is if there a reliable method in 2.3 that does what I 
need?

It has recently come to my attention that Lutz Paelike is in exactly the 
same situation I am in, so I don't think this is a fringe concept.





From swalters_usenet at yahoo.com  Sun Jan 18 04:22:33 2004
From: swalters_usenet at yahoo.com (Samuel Walters)
Date: Sun, 18 Jan 2004 09:22:33 GMT
Subject: Web Form Error Handling Techniques
References: <mailman.440.1074275556.12720.python-list@python.org>
Message-ID: <pan.2004.01.18.09.20.58.39947@yahoo.com>

| Sean Abrahams said |

> def insertData(data):
> 
>      # test data for validity
>      if not data['name'].isalpha():
>         raise InvalidDataError(data['name'], "Name contains non-alpha
>         characters")
>      if not data['age'].isdigit():
>         raise InvalidDataError(data['age'], "Age contains non-digit
>         characters")
> 
>      sql = """
>      INSERT INTO people (name, age) VALUES ('%s', '%s')
>      """ % (data['name'], data['age'])
> 
>      executeSQL(sql)
> 
> I should first check to see if the data is valid, meaning that the
> name contains only alpha characters and the age only containing
> numeric characters.
> 
> If I raise an exception, how would one handle the reprinting of the
> web form with a red * next to the field that contains invalid data? If
> one field is in error, I can see that upon receiving an exception you
> can have your code just reprint the web form with the red star, but
> what about when both fields are in error, do you have the exception
> create a list which then your code checks to see if it exists and then
> loops through it to know what fields are in error?

So, what you're saying is that you wish to have the exception pass
information on which, of each piece, of the data is invalid?

Test it all, and then raise an error based on *all* the data that is
invalid.

For instance:

------
class InvalidDataError(Exception):
    """InvalidDataError
       Attributes: values - a list of tuples of the form:
          (name, data, offense)
          Where name is the name of the field causing problems
          Data is the data the field contained.
          Offense is a string describing the problem encountered.
    """
    def __init__(self, value):
        self.value = value

    def __str__(self):
        return str(value)
        

def insertData(data):

     errors = []
     if not data['name'].isalpha():
         errors.append(('name', data['name'], "Name contains non-alpha characters"))
     if not data['age'].isdigit():
         errors.append(('age', data['age'], "Age contains non-digit characters"))

     if len(errors):
         raise InvalidDataError(errors)
                    
     sql = """
     INSERT INTO people (name, age) VALUES ('%s', '%s')
     """ % (data['name'], data['age'])

     executeSQL(sql)


good={"name":"bob", "age":"12343"}
bad={"name":"bob#", "age":"14"}
worse={"name":"bob", "age":"ni!"}
ugly={"name":"v@$$#", "age":"ni!"}

def test(data):
    try:
        insertData(data)
    except InvalidDataError, e:
        print "Data: %s failed with errors:"%(str(data))
        for x in e.value:
            name, data, problem = x
            print "Field \"%s\" had bad data \"%s\" and reported \"%s\" as the problem."%(name, data, problem)
        print
    else:
        print "Good %s found to be A-Ok!"%(str(data))
        print

test(good)
test(bad)
test(worse)
test(ugly)
------

Now, with that code, you can format your user response any way you want.

User defined exceptions can toss around any type of data.
See section 8.5 of the tutorial for examples:
http://www.python.org/doc/current/tut/node10.html

Also, one other test that needs to be performed is to check whether the
data dictionary passed to insertData contains each of the fields required.
One checks this with data.has_key('name').  If you get passed a bad piece
of data, then you can handle it gracefully.  Personally, I would create a
different exception for that because the cause could be either programmer
error, or bad data being passed to the program.

Personally, though, I wouldn't wait until just before inserting the data
to check it's validity.  I prefer to catch invalid data as *early* as
possible.  When I'm writing CGI and other web scripts, the outline of my
program looks like this:

Check for the existence and validity of each piece of data.
If error exists:
    Generate and return an error page to the user.
Else:
    Handle the data and generate a response page for the user.

It's a good habit to check the validity of each piece of data as soon as
it's received.  This lets you separate problems where the user sent you
bad data, and problems where you messed up the data along the way.  If the
user passed you decent data, then the only error they should see is some
form of "Internal Server Error."		

HTH

Sam Walters.

-- 
Never forget the halloween documents.
http://www.opensource.org/halloween/
""" Where will Microsoft try to drag you today?
    Do you really want to go there?"""



From anton at vredegoor.doge.nl  Mon Jan 12 20:03:31 2004
From: anton at vredegoor.doge.nl (Anton Vredegoor)
Date: Tue, 13 Jan 2004 02:03:31 +0100
Subject: Why learn Python ??
References: <40029dad$0$28706$a729d347@news.telepac.pt>
Message-ID: <4003444f$0$136$3a628fcd@reader1.nntp.hccnet.nl>

"Bicho Verde" <bichoverde at sapo.pt> wrote:

>    I just have this idea that I would like to contribute to the curve of
>accelarated exponential progress (technological singularity), artificial
>intelligence and so on. From that point of view there is much to do... But
>can I stand for it and where to start?
>      Anyone would help me and give me some hints?

http://www.nickbostrom.com

Anton


From newsgroups at jhrothjr.com  Thu Jan  8 07:34:12 2004
From: newsgroups at jhrothjr.com (John Roth)
Date: Thu, 8 Jan 2004 07:34:12 -0500
Subject: Descriptor puzzlement
Message-ID: <vvqjj92il4o1d0@news.supernews.com>

Using Python 2.2.3, I create this script:

[beginning of script]

class AnObject(object):
    "This might be a descriptor, but so far it doesn't seem like it"
    def __init__(self, somedata):
        self.it = somedata
    def __get__(self, obj, type=None):
        print "in get method"
        return self.it
    def __set__(self, obj, it):
        print "in set method"
        self.somedata = it
        return None
##    def foo(self):
##        return 1

class AnotherObject(object):
    def __init__(self):
        self.prop = AnObject("snafu")

myClass = AnotherObject()
print myClass.prop
myClass.prop = "foobar"
print myClass.prop

[end of script]

Then I execute it:

C:\Documents and Settings\John\My Documents\Projects\AstroPy4>b

C:\Documents and Settings\John\My Documents\Projects\AstroPy4>python b.py
<__main__.AnObject object at 0x0086D248>
foobar

It doesn't look like the descriptor protocol is getting
invoked at all.

What's happening here?

John Roth




From rroberts at adobe.com  Fri Jan  9 20:46:42 2004
From: rroberts at adobe.com (Read Roberts)
Date: Fri, 09 Jan 2004 17:46:42 -0800
Subject: Help in unwrapping a PyObject* returned by an embedded Python
	function
Message-ID: <p05200f04bc2509d64308@[192.168.1.100]>

Environment: Mac OSX 10.2.4, vanilla Python 2.3.2 install

Why does PyArg_ParseTuple fail to parse a  return value which is a tuple?


When inside a C extension function, I  call a Python function :
    pyStringResult = PyEval_CallObject(pyEN_callback, arglist);

The Python function runs just fine, and returns a string value.
The following works fine, where name is (char**).

from Python callback function:		return myString
in calling C function: 			*name = 
PyString_AsString(pyStringResult);

However, the following does not work:
from Python callback function:		return (myString)
in calling C function:
	if (!PyArg_ParseTuple(pyStringResult, "s", name)) {
  		dbprintf(4, "c: failed to parse return value\n");
		PyErr_Clear();
	}
PyArg_ParseTuple fails, and returns NULL. How come? By the 
documentation, I would think that PyArg_ParseTuple would parse any 
Python tuple object.

-- 
-----------------------------------------------------------------------------------------
Read K. Roberts			rroberts at adobe.com
Adobe Systems San Jose TW12 	(408)-536-4402 on Weds
San Francisco 			(415) 642-5642 Mon, Tues, Thurs, Fri



From jblazi at hotmail.com  Mon Jan 12 10:08:35 2004
From: jblazi at hotmail.com (jblazi)
Date: Mon, 12 Jan 2004 16:08:35 +0100
Subject: Further problems wirh Emacs Python mode
Message-ID: <pan.2004.01.12.15.08.33.922000@hotmail.com>

The Python mode for Emacs works nicely on my own machine but it does not
work entirely correctly in my school.
We use a Novell network and that may cause some problems.
Shen I am editing a Python program and type C-c C-c, the second window
with the caption is displayed (The Emacs window is tiled), but the print
output does not appear. When my Python program is for example

print 'hallo'

nothing is displayed in the Python Output Window. (On my machine at home I
see 'Hallo' (without the 's).

I should like to add this: I usually start Python programs on the school
systems by typing test.py (for example) at the command line. Then the
Python interpreter is automativally started and test.py is executed. This
does not work with the Python mode package (CPython?) and so I wrote a
batchfile python.py, that contains the only line %1.


Has anybody an idea, what goes wrong?

-- 
TIA,
jb



----== Posted via Newsfeed.Com - Unlimited-Uncensored-Secure Usenet News==----
http://www.newsfeed.com The #1 Newsgroup Service in the World! >100,000 Newsgroups
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From francisgavila at yahoo.com  Sun Jan  4 11:32:07 2004
From: francisgavila at yahoo.com (Francis Avila)
Date: Sun, 4 Jan 2004 11:32:07 -0500
Subject: Parametrized inheritance
References: <2AJJb.725692$HS4.5422608@attbi_s01>
	<mailman.64.1073189833.12720.python-list@python.org>
	<sNNJb.741891$Fm2.670283@attbi_s04>
Message-ID: <vvgg21lsjvjj87@corp.supernews.com>

#quote#
Dan Bullok wrote in message ...
Mike C. Fletcher wrote:

> You can find more information about these kinds of patterns by searching
> for "Mix-In Class" and/or "Multiple Inheritance".  Python 2.2 changed how
> multiple inheritance graphs are constructed in Python, BTW.  If you used
> old-style classes the mro would have been [MySub, Sub, Base, MyBase, Base]
> IIRC.

Well, I thought of doing this, but after looking up resolution order (sec
9.5.1 of the tutorial) I found that resolution is done "depth-first,
left-to-right",  In my example, that would have given [MySub, Sub, Base,
MyBase, Base], but, I checked, using mro(), and found that it was indeed
[MySub, Sub, MyBase, Base], just as I needed it.  (thanks for the mro() tip
- didn't know about that one).  Unless I've gone crosseyed (possible, it's
late), this is NOT depth-first, left-to-right.  So is the tutorial out of
date?
#endquote#

I just looked and, yes indeed, it is out of date (file a bug report).
Python 2.2 used this mro, which was changed in 2.3.  2.3 uses a so-called
'C3' mro, which is a bit more complex.  See
http://www.python.org/2.3/mro.html.

The best documentation on Python classes WRT the new-style changes is an
essay by Guido at http://www.python.org/2.2.2/descrintro.html.  It says 2.2,
but it mentions 2.3 changes as inline addendums.

Odd thing is, filename is "descriptor intro" yet it doesn't mention
descriptors.  There's a good reference on the madness that is descriptors at
http://users.rcn.com/python/download/Descriptor.htm.
--
Francis Avila



From skip at pobox.com  Thu Jan 29 10:35:17 2004
From: skip at pobox.com (Skip Montanaro)
Date: Thu, 29 Jan 2004 09:35:17 -0600
Subject: isinstance() bug
In-Reply-To: <20040129083746.GA27504@foof.i3.cz>
References: <mailman.925.1075304492.12720.python-list@python.org>
	<ZnURb.45568$U%5.239709@attbi_s03>
	<20040129083746.GA27504@foof.i3.cz>
Message-ID: <16409.10293.242424.825038@montanaro.dyndns.org>


    >>> it's my belief that if i'm instantiating a class from the same
    >>> location no matter how i imported its definition, its instances are
    >>> always of the same class.

    >> Your belief is incorrect.  'package.module.A' and 'module.A' are
    >> distinct classes.  

    Michal>  could you elaborate further why do you consider the current
    Michal>  behaviour to be correct? you've only described how it works
    Michal>  currently. i'd be interested what's the reasoning behind that.

It's not necessarily a bug.  More likely it's a feature.  It does what you
expect -- if your mental model of how things work corresponds to how things
really work. ;-)
 
    Michal>  i'm inclined to think that the current behaviour is a
    Michal>  side-effect of the implementation (perhaps to which some got
    Michal>  used to?).

Before Python had packages this sort of thing occurred much less frequently.
If CPython's behavior was changed now (I don't know if Jython's behavior is
the same) the change might raise subtle, hard-to-find errors.  Maybe you can
solve it by adding a shadow dictionary keyed by inode number.  It would
probably need to be exposed in sys as something like sys.module_inodes, so
that programmers can explicitly force module deletion from the runtime.  Any
place sys.modules is tweaked sys.module_inodes would have to be as well.

Skip




From jjl at pobox.com  Mon Jan  5 11:13:55 2004
From: jjl at pobox.com (John J. Lee)
Date: 05 Jan 2004 16:13:55 +0000
Subject: RELEASED: allout-vim 031229
References: <mailman.26.1072753109.8134.python-list@python.org>
	<pan.2003.12.31.05.47.10.999283@yahoo.com>
	<mailman.70.1072876780.8134.python-list@python.org>
	<pan.2003.12.31.14.49.29.838030@yahoo.com>
	<mailman.72.1072888283.8134.python-list@python.org>
	<yfsr7ykb8a4.fsf@black132.ex.ac.uk>
	<mailman.17.1072988207.12720.python-list@python.org>
Message-ID: <87d69yqsos.fsf@pobox.com>

Fran?ois Pinard <pinard at iro.umontreal.ca> writes:

> [Alexander Schmolck]
> > Fran?ois Pinard <pinard at iro.umontreal.ca> writes:
> 
> > > In French, we easily use "formidable" to describe a girl who is
> > > wonderfully sympathetic and/or attractive.
> 
> > I think sympathetic is another of those false friends :)
> 
> Indeed, thanks!!  I just looked it up in a dictionary...
[...]

Fran?ois, your English is good enough to be comprehensible 99% of the
time, and bad enough to be endearing.  If you get any better at it,
people will start to take all your words seriously, and *then* you'll
be in trouble <0.5 wink>.

Of course, you don't always get the whole truth from dictionaries.  I
remember my sister and I laughing at the translation in our school
French textbook of "zut" as "bother".  "Bother" must be the mildest
swearword (if you can call it that) in the English language --
comically so.  We were of the opinion that a word that's so clearly
designed to be spat must be at least two notches up in vulgarity.  :-)

(Now, how do I make a transparent pretence of remaining OT...)
Thankfully, Python doesn't have that problem.

No, actually, a *real* OT comment: I'm pretty sure I've seen two big
pieces of code, by two French authors, in which the word "eventually"
is used all over the place, in a way that clearly means something to
French people <wink>.  "eventually" --> "finally", perhaps?  I don't
think it's as simple as that, though.  One example:

http://pybliographer.org/


John


From james at logicalprogression.net  Fri Jan 23 09:36:19 2004
From: james at logicalprogression.net (James Henderson)
Date: Fri, 23 Jan 2004 14:36:19 +0000
Subject: C compilers
In-Reply-To: <X59Qb.20838$q4.11416@newsread3.news.atl.earthlink.net>
References: <X59Qb.20838$q4.11416@newsread3.news.atl.earthlink.net>
Message-ID: <200401231436.19383.james@logicalprogression.net>

On Friday 23 January 2004 1:13 pm, Lucas Raab wrote:
> I realize that this is a Python newsgroup, but do any of you know any good
> C/C++ compilers?? I'm interested in imbedding C with Python.
>
> Thanks

This would have been less OT if you'd asked what compilers you can build 
Python with.  Then I would have directed you to the README that comes with 
the Python distribution.

Without knowing your platform it would be hard for anyone - on any newsgroup - 
to help you further.

James
-- 
James Henderson, Logical Progression Ltd.
http://www.logicalprogression.net/
http://sourceforge.net/projects/mailmanager/




From rmkrauter at yahoo.com  Wed Jan 21 18:23:12 2004
From: rmkrauter at yahoo.com (Rich Krauter)
Date: Wed, 21 Jan 2004 18:23:12 -0500
Subject: Assignment to slice
In-Reply-To: <20040121130236.D8E3.JCARLSON@uci.edu>
References: <mailman.604.1074712550.12720.python-list@python.org>
	<20040121130236.D8E3.JCARLSON@uci.edu>
Message-ID: <1074727392.4458.47.camel@vaio>

I'm just surprised that nobody thinks it's unusual. 

>>> x = []
>>> x[4] = 5  
Python says "Wrong! Can't do that! I'm quitting now!"
>>> x = [] 
>>> x[4:5] = [1,2,3,4,5] 
Python says "Ok. Cool. Those indices don't exist in x so I'll just stick
your list at the beginning,
and the indices you used in the slice have nothing to do with where the
elements end up,
since they don't exist in the list anyway."

To me that doesn't look much different than if python were to do this:
(not real code obviously)
<fiction>
>>> x = []
>>> x[4] = 5
>>> x
[5]
Python says "Well, x[4] doesn't exist so you must have meant x[0]."
<fiction>

That would make no sense. So why does it make sense to do that same
exact thing if you're 
assigning to a slice, instead of an element? 

That's what I see as inconsistent; not that python does not behave just
like perl. I'm sure that
a little more time will reveal this 'inconsistency' as a shortcoming in
the wiring of my brain, and
not a weird python idiosyncrasy. It's cool to hear other people's take
on it.
Thanks alot.
Rich







On Wed, 2004-01-21 at 16:09, Josiah Carlson wrote:

> > Instead python will just tack stuff on to the front of
> > the array. Which, I still believe, is totally
> > inconsistent. But what do I know? I have about 5
> > minutes of python experience.
> 
> > Oh well. Maybe my problem is that I'm using perl as my
> > model of consistency. Plus, it's a minor issue anyway.
> > I just need to be aware of it, and not try to write
> > perl code in python. I need to learn to write python
> > code in python.
> 
> There are a few choices that one can make when allowing slice reading
> and writing in sequences.  Python made one: never cause an exception for
> integer arguments, and certain indices map to the same location.  Perl
> made another: extend the sequence if necessary to fill it out.
> 
> Both are consistent and predictable.  Python does it one way, Perl does
> it another.  Heck, Python has variable definitions that are done one way,
> Perl has variable definitions that are done another.  They were choices
> made during the creation that fit a paradigm.
> 
> Expecting Python to behave like Perl is like expecting your mother to
> pee standing up; without alteration, it's not gonna happen.
> 
>  - Josiah
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From candiazoo at comcast.net  Sat Jan 24 23:17:36 2004
From: candiazoo at comcast.net (Zoo Keeper)
Date: Sun, 25 Jan 2004 04:17:36 GMT
Subject: Seem to be having trouble with Python/Bethon.
References: <PM0003D18B88B36E37@x1-6-00-a0-c9-e7-c3-de.ne1.client2.attbi.com>
	<6a2dnXCsJ60-9Yzd4p2dnA@giganews.com> <1074926701.236022@yasure>
Message-ID: <ArHQb.141474$I06.1320223@attbi_s01>

Don!  You've done great work.  I suppose I can try rebuilding after switching
back to net_server.  I have 2.2.2 w/0.5.0 and that failed as well, btw.  I
apologize for not providing more information, I did not seek to irritate you.
:/ (as you sound in your response) and I appreciate all the work you've done.

Neither did I mean to imply that I was not sure if I wanted to use
Python/Bethon.  I love Python, and I love BeOS.  Bethon seems to be the way to
go, altho' I need to learn Bethon.

So, anyway, I will try switching back to net_server, building 0.5.1 for 2.2.2
and give it another go.

Mike

In message <1074926701.236022 at yasure>, "Donn Cave" wrote:
> Quoth Zoo Keeper <candiazoo at comcast.net>:
> | No takers, eh?  :/
> |
> | I can't be the only python user on BeOS...
> |
> | The only thing I can think of is that I am running "bone".
> 
> Well, at least now we know one thing about your setup.
> 
> In later versions, a Python class can definitely inherit
> from BWindow.  If you have the 0.5.1 distribution, the
> programs in "test" do it that way, and they work.  Earlier
> versions, before 0.5.0, can't do this (and neither can
> older versions of Python.)  It is certainly possible to
> mess up the BeOS libraries while trying to improve them,
> though, as demonstrated by the 3rd party "Developer Edition".
> That certainly could be your problem.
> 
> You're not the only Python user on BeOS, but they are few.
> Given the level of general interest, I think you'd have
> better odds posting to comp.sys.be.programmer.
> 
> As for what I read as your implicit question, will you be
> sorry you chose to develop your application in Python with
> a Bethon UI - it depends on the details.  The functions
> available here are numerous but not nearly the whole Be API,
> and there are whole areas of functionality that it will
> probably never get into.  It's pretty useful for casual
> stuff, but probably not for real hard core polished
> applications.  Distribution will be a harder, too, than
> a straight C++ program.
> 
> 	Donn Cave, donn at drizzle.com




From __peter__ at web.de  Sun Jan  4 16:09:35 2004
From: __peter__ at web.de (Peter Otten)
Date: Sun, 04 Jan 2004 22:09:35 +0100
Subject: Tkinter.Menu() Question
References: <4a_Jb.8099$6B.48@newsread1.news.atl.earthlink.net>
Message-ID: <bt9v6d$s3n$07$1@news.t-online.com>

Adonis wrote:

> I wish to create a popup menu from a list, when it is created they all
> show the same label from the list:
> 
> Months = [0, 'January', 'February', 'March', 'April', 'May', 'June',
>             'July', 'August', 'September', 'October', 'November',
> 'December']
> 
> def _Menu_Click(self, month):
>     print month
> 
> menu = Menu(fraMain, tearoff=0)
> 
> for Month in Months[1:]:
>     menu.add_command(label=Month, command=lambda : _Menu_Click(Month))
> 
> When the menu calls _Menu_Click(...) it always prints 'December'
> 
> Now my understanding is the when an object is created and it is
> replicated, whichever of the modified replications affects all of the
> objects, being that they are just mere references to the original (my
> wording might be off, correct me if I am wrong). How do I avoid this for
> what I am trying to achieve?

(I made some bogus changes so I could ensure it works)

from Tkinter import *

Months = [0, 'January', 'February', 'March', 'April', 'May', 'June',
            'July', 'August', 'September', 'October', 'November',
'December']

root = Tk()

class DontCare:
    def _Menu_Click(self, month):
        print month
dc = DontCare()

mb = Menubutton(root, text="so what")
mb.pack()
menu = mb["menu"] = Menu(mb, tearoff=0) 


for Month in Months[1:]:
    menu.add_command(label=Month, command=lambda m=Month: dc._Menu_Click(m))

root.mainloop()

Note how the instance (dc) is provided with the method (_Menu_Click) in the
lambda (in your real code you will most likely have to replace dc with
self). The real trick is to provide the loop variable Month as the default
value for m in the lambda. m will be bound to the same string as Month when
the lambda is *created*. If you don't do this, the value of the variable
Month will be looked up when the lambda is *called*, which will be always
"December" after the for loop is terminated.

Peter


From ashleylloyd at hotmail.com  Fri Jan  9 09:34:30 2004
From: ashleylloyd at hotmail.com (Ashley Lloyd)
Date: Fri, 09 Jan 2004 14:34:30 +0000
Subject: Debugging Python
Message-ID: <BAY99-F47VIsvr18ffj000064b1@hotmail.com>

Thanks very much for your help.
Have a good weekend!
Cheers
Ashley


>From: "Mike C. Fletcher" <mcfletch at rogers.com>
>To: Ashley Lloyd <ashleylloyd at hotmail.com>,  Python List 
><python-list at python.org>
>Subject: Re: Debugging Python
>Date: Fri, 09 Jan 2004 09:06:33 -0500
>
>Standard module pdb is popular (and what I use, though I also do lots of 
>print-statement debugging too).  There's also a win32db (or something like 
>that) in PythonWin.  Some of the IDE's have integrated debuggers which are 
>normally very similar to pdb.  I think HapDebugger is about the only truly 
>"different" debugging system, in that it's an out-of-process (and IIRC, 
>remote) debugging mechanism that relies on a patched version of Python.
>
>BTW, the Agile Programmer types have been known to suggest that debuggers 
>are entirely unnecessary, as everything should be caught by more and more 
>fine-grained unit-tests.  Seems like a nice way to go, IMO.
>
>HTH,
>Mike
>
>Ashley Lloyd wrote:
>
>>What do people generally use to debug their Python programs? I haven't 
>>seen anything out there that walks through the code, but perhaps I'm 
>>looking in the wrong places?
>
>_______________________________________
>  Mike C. Fletcher
>  Designer, VR Plumber, Coder
>  http://members.rogers.com/mcfletch/
>
>
>

_________________________________________________________________
Express yourself with cool new emoticons http://www.msn.co.uk/specials/myemo




From skip at pobox.com  Thu Jan 22 21:50:18 2004
From: skip at pobox.com (Skip Montanaro)
Date: Thu, 22 Jan 2004 20:50:18 -0600
Subject: HDD Stress Test with Python
In-Reply-To: <bupji9$c2f$1@solaris.cc.vt.edu>
References: <bupji9$c2f$1@solaris.cc.vt.edu>
Message-ID: <16400.35818.996805.854108@montanaro.dyndns.org>


    Bart> A bit off topic, but here goes: Does this look like a reasonable
    Bart> hard drive stress-test?

    ...

    Bart>     fp1 = os.popen("/sbin/newfs /dev/disk0s3", "r")
    ...
    Bart>     fp2 = os.popen("/sbin/newfs /dev/disk0s5", "r")
    ...

My guess is that newfs isn't all that random in its behavior, nor that it
touches all that much of the disk.  I think it mostly lays down inode
structure.  I doubt it even zeroes out the data chunks.  You might want to
do something like build multiple copies of some huge program (Emacs?  GCC?
Gimp? Darwin kernel?) in parallel, while constantly creating and deleting a
bunch of large files stuffed with random bits.

Skip



From a.schmolck at gmx.net  Fri Jan  9 07:06:21 2004
From: a.schmolck at gmx.net (Alexander Schmolck)
Date: 09 Jan 2004 12:06:21 +0000
Subject: Object-based inheritance in Python
References: <btm3u5$13so$1@f1node01.rhrz.uni-bonn.de>
Message-ID: <yfszncxuy0y.fsf@black132.ex.ac.uk>

Tobias Windeln <Tobias.Windeln at gmx.de> writes:

> Maybe there is a way to hand over self to the delegatee object.
[...]

> class Child:
>      def __init__(self, delegatee):
>          self.__dict__['delegatee'] = delegatee

Can't you just use this pattern:

           self.__dict__['delegatee'] = delegatee(self)
  ?

'as


From mwilson at the-wire.com  Wed Jan 28 11:29:18 2004
From: mwilson at the-wire.com (Mel Wilson)
Date: Wed, 28 Jan 2004 11:29:18 -0500
Subject: How does compare work?
References: <40158680$0$7044$ba620e4c@news.skynet.be>
	<20040126235704.GD13453@siliconimage.com>
	<mailman.850.1075209472.12720.python-list@python.org>
Message-ID: <eN+FAls/KHIb089yn@the-wire.com>

In article <mailman.850.1075209472.12720.python-list at python.org>,
Gerrit Holl <gerrit at nl.linux.org> wrote:
>Inyeol Lee wrote:
>> (This unusual definition of comparison was used to simplify the
>> definition of operations like sorting and the in and not in operators.
>> In the future, the comparison rules for objects of
>> different types are likely to change.)
>> """
>
>When comparing mixed types becomes illegal, does that mean sorting a
>sequence of mixed types becomes illegal as well? Or will sort be a
>special case?

   Presumably there'd be a whole new set of comparisons that
would support inter-type < (e.g. for sorts) and == (e.g. for
dicts).  Even then, what about PEP 326, which presumes to
define highest and lowest objects that can be compared with
anything?

        Regards.        Mel.


From try_vanevery_at_mycompanyname at yahoo.com  Tue Jan 13 22:00:43 2004
From: try_vanevery_at_mycompanyname at yahoo.com (Brandon J. Van Every)
Date: Tue, 13 Jan 2004 19:00:43 -0800
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
	<pan.2004.01.14.01.17.00.970198@fakeemail.com>
Message-ID: <bu2ana$bmpci$1@ID-207230.news.uni-berlin.de>


"Dan Olson" <hatespam at fakeemail.com> wrote in message
news:pan.2004.01.14.01.17.00.970198 at fakeemail.com...
>
> As a person heavily involved in the pseudo-commercial Linux game industry
> and a Linux user in general, I must say that I agree with your general
> assessment that Linux users do far too little to make sure that their
> applications run and run well on Windows.

Yeeeeeeeey! agreement of some kind from some quarter.

> That said, I disagree that Open Source projects have little to no value in
> commercial projects.  There are countless examples that could be pointed
> out, but I'll just point out one of them: OpenAL.

I did mention there are exceptions, but they are few and far between.
OpenAL is once again not a game project.  Generally speaking, there is no
critical mass of Open Source development in the Windows world.  The vast
majority of Open Source developers are Linuxers, and carry with them Linux-y
baggage about how software "should" be developed.  Their notions of
"should," both ideologically and practically, lead to Windows build
procedures being rather shoddy.

> Here is my future advice: get a month and a half into a project before
> announcing it.

I'm curious what sky is going to fall if I don't follow your advice?
Really, so many engineers have this "I want everybody to shut up" mentality.
It's not like when I first spoke, that I promised anyone anything, or was
particularly looking for help (unless someone with a very similar agenda had
happened along).  Rather I offered up a set of ideas for people to kick at.
Thanks, one and all, for whatever small amount of intellectual labor you
performed for me at the time.

> Not only will you have people not saying "I told you so"
> if you scrap it, but people will in general be more interested in your
> project when you have something to show for it.

Dude, when you "are interested" in Ocean Mars, I will be worth millions of
dollars.  You are never going to be interested in it before then.  So why
should I care if you are interested or not, right now?  The only thing
people like you respect is money and success.  I am different, I respect the
honest attempts.  That's the "what it means to be an indie developer"
conversation I think is worth having.  Your kind of conversation, that "you
are only allowed to publically demonstrate success," is a conversation I
think worth ignoring.  It's bullshit: the vast majority of us do *not*
succeed all the time, or even a lot of the time.  We fear to admit this
because we don't want to look stupid.  But, at this point in my career I'm
quite beyond that fear.

> Are you planning to make your vs.net version of FreeCiv available?  Others
> might be interested in continuing the work.

Yes, I do.  The question is whether I can get the freeciv.org people to put
it in their source pool or not.

> Cygwin is a horrible horrible
> way to run things on Windows, and I'd like to take this time to insult the
> mothers of everyone who has ever made their Linux application run on
> Windows using only Cygwin.

I am not sure how I feel about it.  I think it only bothers me when they
claim to be cross-platform in theory, and the Windows build simply does not
work in practice.  A working Windows build should be easy to obtain all the
dependencies for, and it should just build.  When it doesn't do that, when
you have to chase all over Hell's green acre to find the libraries, and then
the build simply coughs and gags and dies, I'm not even slightly amused at
how "cross-platform" some Linuxer is claiming things to be.

Linux == grungy OS for people who mostly don't care about good deployment
and ease-of-use practices.

-- 
Cheers,                     www.indiegamedesign.com
Brandon Van Every           Seattle, WA

When no one else sells courage, supply and demand take hold.



From ramen at lackingtalent.com  Sat Jan 17 16:54:21 2004
From: ramen at lackingtalent.com (Dave Benjamin)
Date: Sat, 17 Jan 2004 21:54:21 -0000
Subject: Does anyone else not find the fun in programming...?
References: <d232c5e.0401130823.27fd26ff@posting.google.com>
	<4004f5ac$0$69931$edfadb0f@dread12.news.tele.dk>
Message-ID: <slrnc0jc91.75d.ramen@lackingtalent.com>

In article <4004f5ac$0$69931$edfadb0f at dread12.news.tele.dk>, Max M wrote:
> But I also have a hobby creating music with algorithmic composition 
> techniques in Python. And that is *fun*

What Python libraries do you use to do algorithmic composition? I played
around with Snack (for Tcl) awhile back but couldn't get decent realtime
performance so I gave up on the idea for the time being. I'm very interested
to hear what sort of techniques you use.

-- 
.:[ dave benjamin (ramenboy) -:- www.ramenfest.com -:- www.3dex.com ]:.
: d r i n k i n g   l i f e   o u t   o f   t h e   c o n t a i n e r :


From tweedgeezer at hotmail.com  Tue Jan 27 16:18:43 2004
From: tweedgeezer at hotmail.com (Jeremy Fincher)
Date: 27 Jan 2004 13:18:43 -0800
Subject: I support PEP 326
References: <mailman.654.1074788734.12720.python-list@python.org>
Message-ID: <698f09f8.0401271318.21c9ca72@posting.google.com>

Gary Robinson <grobinson at transpose.com> wrote in message news:<mailman.654.1074788734.12720.python-list at python.org>...
> I've recently had a couple of cases of needing exactly what it proposes, and
> having to kluge around the fact that it's not there. It's a great idea.
> 
> If there anywhere else I should be expressing my opinion on this, let me
> know.

I'm also in support of this PEP, and have cases in which I would use
the new singletons.

The biggest reason I believe the PEP should be accepted is that you
simply *can't* "roll your own" in a heterogenous environment.  If I
have my Min/Max objects and you have your Min/Max objects, someone's
objects simply aren't going to work as expected.

I'm in favor of Minimum and Maximum, though, if only for ease in
discussing Python: the capital isn't obvious both verbally or at the
beginning of a properly written sentence.

Jeremy


From python at quixs.com  Wed Jan 14 12:34:49 2004
From: python at quixs.com (Lars Heuer)
Date: Wed, 14 Jan 2004 18:34:49 +0100
Subject: wxPython worries
In-Reply-To: <40055e11$0$282$4d4ebb8e@news.nl.uu.net>
References: <mailman.352.1074092092.12720.python-list@python.org>
	<40055e11$0$282$4d4ebb8e@news.nl.uu.net>
Message-ID: <375234841.20040114183449@quixs.com>

Hello Guyon,

> I've got the same worries, but I'm still not really convinced...
> boa-constructor is nice... but not there yet

There's another free tool:

wxGlade
  http://wxglade.sourceforge.net/

Commercial tools:
wxDesigner:
  http://www.roebling.de/

DialogBlocks:
  http://www.anthemion.co.uk/dialogblocks/

Maybe some of these tools fit your needs. I've no deep experience with
them all. :)
  
HTH,
Lars




From artur_spruce at yahoo.com  Thu Jan 22 17:19:31 2004
From: artur_spruce at yahoo.com (AdSR)
Date: 22 Jan 2004 14:19:31 -0800
Subject: Error under Cygwin - threading module
Message-ID: <b840abf4.0401221419.343cb5e1@posting.google.com>

Hello,

Nothing relevant found on Google for this, so I'm asking here. I wrote
a short script that launches several threads (parallel download using
urllib.urlretrieve in this case). Sometimes when I launch my script
under Cygwin, I get strange error messages like:

      2 [win] python 1912 Winmain: Cannot register window class

Sometimes all of the threads run OK, otherwise after the "correct"
ones finish the console stops responding anyway. No problems directly
under Windows, and /lib/python2.3/test/test_threading.py works fine
too. What is wrong?

Here is the script:

---- wp_retr.py ----

#!/usr/bin/env python

"""Retrieve files from the list, give new names if present in list."""

from __future__ import division

import re
import urllib
import threading
import time
import sys


class Download:
    def __init__(self, url, name):
        self.url = url
        self.name = name
        self.last_check = 0.0


class DownloadBag:
    def __init__(self, downloads):
        self._downloads = []
        for url, name in downloads:
            self._downloads.append(Download(url, name))
    def start(self):
        threads = []
        for d in self._downloads:
            p = self._createProgress(d)
            thargs = (d.url, d.name, p)
            th = threading.Thread(target=urllib.urlretrieve,
args=thargs)
	    threads.append(th)
            th.start()
	return threads
    def _progress(self, download, blocks, blk_size, total):
        t = time.time()
        if t - download.last_check > 5:
            if total != -1:
                print "%s -> %s: %2.1f%%" % (download.url,
download.name,
                                            
blocks*blk_size/total*100)
            else:
                print "%s -> %s: %d bytes" % (download.url,
download.name,
                                              blocks*blk_size)
            download.last_check = t
    def _createProgress(self, download):
        def progf(blocks, blk_size, total):
            self._progress(download, blocks, blk_size, total)
        return progf


if __name__ == "__main__":
    spcre = re.compile(r"(.*?)\s+(.*)$")
    slashre = re.compile(r"(?:.*)/(.*?)$")
    f = file(sys.argv[1]) #"filelist.txt")
    filelist = []
    for line in f:
        line = line.strip()
        m = spcre.match(line)
        if m:
            url, name = m.groups()
        else:
            m = slashre.match(line)
            if m:
                url, name = line, m.group(1)
            else:
                print "Incorrect line format:\n%s" % line
                continue
        filelist.append((url, name))
    f.close()
    db = DownloadBag(filelist)
    threads = db.start()
    for t in threads:
        t.join() 

----

and here is an example input file (run as python filelist.py
filelist.txt):

---- filelist.txt ----

http://www.gnu.org/software/bash/manual/bashref.html
http://www.gnu.org/software/make/manual/html_mono/make.html 

----

TIA,

AdSR


From tchur at optushome.com.au  Thu Jan 15 16:20:35 2004
From: tchur at optushome.com.au (Tim Churches)
Date: 16 Jan 2004 08:20:35 +1100
Subject: Why gmp is not in the standard library?
In-Reply-To: <4f0a9fdb.0401150211.615a7f45@posting.google.com>
References: <4f0a9fdb.0401150211.615a7f45@posting.google.com>
Message-ID: <1074201635.1875.32.camel@emilio>

On Thu, 2004-01-15 at 21:11, Miki Tebeka wrote:

> Which made me think why Python don't use gmp as it's primary math
> package - we'll get fast results, a lot of number types and much more.
> 
> Can't think of any reason why Python is implementing its own long
> numbers...
> Can you enlighten me?

As others have said, re-engineering Python to use GMP numeric types
would be a huge undertaking. But I think there is a case to be made for
including gmpy as a library in the standard Python distribution. It is
very small and doesn't take long to compile, but is incredibly useful.

Of course, someone would need to prepare Python-style docs, and someone
would need to track GMP development and update the version included with
Python at each release (the current gmpy developers perhaps) - thus I
suspect it is more a resourcing issue than anything else. However, if
some dead wood is ever removed from the Python standard library, I would
love to see gmpy take its place. Thanks to the gmpy (and GMP) developer,
BTW.

-- 

Tim C

PGP/GnuPG Key 1024D/EAF993D0 available from keyservers everywhere
or at http://members.optushome.com.au/tchur/pubkey.asc
Key fingerprint = 8C22 BF76 33BA B3B5 1D5B  EB37 7891 46A9 EAF9 93D0


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From cleroy at saros.fr  Fri Jan  9 10:13:02 2004
From: cleroy at saros.fr (chriss)
Date: Fri, 09 Jan 2004 16:13:02 +0100
Subject: problem with a python service
Message-ID: <btmh27$6k2$1@news.mc2.net>

Hello everybody!

I'm very bad in English but I'm going to try to explain my problem.

I have a python program and this program is a service.

chronologically:
1. I install my program like service -> it's ok
2. I start the service -> it's ok
3. I stop the service -> it's ok
4. I remove the service -> it's ok
5. I install a new version of my program like service -> it's ok
6. i try to start my new service but it don't start.

If I remove the new service and I install the old service I don't arrive 
  to start my old service.

If I launch my program like a process, the program start.

Is it possible that the service is badly remove?  How to make to check it?

I install my service with the command: "myService.py --startup auto 
--interactive install"

I remove my service with the command: "myService.py remove"

I start my service with the command: "net start pampa" (pampa is the 
service name)

I stop my service with the command: "net stop pampa"

Here the code of my service:

import win32serviceutil, win32service
import pywintypes, win32con, winerror

from win32event import *
from win32file import *
from win32pipe import *
from win32api import *
from ntsecuritycon import *

import log
import PampaClient
import time

class PampaService (win32serviceutil.ServiceFramework):

     _svc_name_ = 'Pampa'
     _svc_display_name_ = 'Pampa Client pour WinNT'

     def __init__ (self,args):
         win32serviceutil.ServiceFramework.__init__(self,args)
         self.hWaitStop = CreateEvent(None, 0, 0, None)

     def SvcStop(self):
         self.ReportServiceStatus(win32service.SERVICE_STOP_PENDING)
         SetEvent(self.hWaitStop)

     def SvcDoRun(self):
         import servicemanager
         servicemanager.LogMsg(
                 servicemanager.EVENTLOG_INFORMATION_TYPE,
                 servicemanager.PYS_SERVICE_STARTED,
                 (self._svc_name_, ' Youpi ?')
                 )
         programmePrincipal = PampaClient.PampaClient()
         try :
             programmePrincipal.main()
         except :
         shutDownThread = programmePrincipal.getShutDownThread()
         shutDownThread.setService(self)
         while 1:
             rc = WaitForMultipleObjects((self.hWaitStop,), 0, 1000)
             if rc==WAIT_OBJECT_0:
                 break

         self.ReportServiceStatus(win32service.SERVICE_STOP_PENDING, 
5000)
         servicemanager.LogMsg(
                 servicemanager.EVENTLOG_INFORMATION_TYPE,
                 servicemanager.PYS_SERVICE_STARTED,
                 (self._svc_name_, ' Arret en cours')
                 )

         shutDownThread.shutDown()
finir
         while shutDownThread.isAlive():
             time.sleep(2)
         self.ReportServiceStatus(win32service.SERVICE_STOP_PENDING, 5000)
         servicemanager.LogMsg(
                 servicemanager.EVENTLOG_INFORMATION_TYPE,
                 servicemanager.PYS_SERVICE_STOPPED,
                 (self._svc_name_, ' Youpiiiii c\'est fini')
                 )


if __name__=='__main__':
     win32serviceutil.HandleCommandLine(PampaService)


thank you in advance for your reponses,

Christophe



From bart_nessux at hotmail.com  Fri Jan 16 08:32:06 2004
From: bart_nessux at hotmail.com (Bart Nessux)
Date: Fri, 16 Jan 2004 08:32:06 -0500
Subject: python & mathematical methods of picking numbers at random
In-Reply-To: <59idnYa3_eQMtJrd4p2dnA@comcast.com>
References: <bu6ptu$kjm$1@solaris.cc.vt.edu>
	<mailman.414.1074195832.12720.python-list@python.org>
	<bu6rvn$njg$1@solaris.cc.vt.edu>
	<59idnYa3_eQMtJrd4p2dnA@comcast.com>
Message-ID: <bu8p4m$sc9$1@solaris.cc.vt.edu>

Terry Reedy wrote:
> "Bart Nessux" <bart_nessux at hotmail.com> wrote in message
> news:bu6rvn$njg$1 at solaris.cc.vt.edu...
> 
>>Jeff Epler wrote:
>>
>>>But why are *you* using
>>>    random.sample(range(len(x)), 25)
>>>instead of
>>>    random.sample(x, 25)
>>>?
> 
> 
>>Because it works and it's fast and len(count) changes every drawing.
> 
> 
> I think you missed Jeff's point, which is that you are repeating part of
> the work that sample tries to do for you.   From the Lib Ref:
> "
> sample(sequence, k): Return a k length list of unique elements chosen from
> the population sequence. Used for random sampling without replacement. New
> in version 2.3.
> 
> Returns a new list containing elements from the population while leaving
> the original population unchanged. The resulting list is in selection order
> so that all sub-slices will also be valid random samples. This allows
> raffle winners (the sample) to be partitioned into grand prize and second
> place winners (the subslices).
> "
> When you get the sample from range(n), you have to use them as indexes into
> x to get the actual list of names.  But the indexing and extraction is what
> sample would do if you gave it x instead of range(x)!

Ahh, I see what you mean.



From webmaster at beyond-thoughts.com  Tue Jan  6 04:23:14 2004
From: webmaster at beyond-thoughts.com (Christoph Becker-Freyseng)
Date: Tue, 06 Jan 2004 10:23:14 +0100
Subject: PRE-PEP: new Path class
In-Reply-To: <vvivefh35qjv9a@news.supernews.com>
References: <vvivefh35qjv9a@news.supernews.com>
Message-ID: <3FFA7E82.4020609@beyond-thoughts.com>

John Roth wrote:

> I'm adding a thread for comments on Gerrit Holl's pre-pep, which
> can be found here:
> 
> http://tinyurl.com/2578q
> 
> Frankly, I like the idea. It's about time that all of the file
> and directory stuff in the os module got objectified
> properly (or at least with some semblance of OO propriety!)
> 
Great I've been thinking of something like this, while I've been writing 
  a "File-Class" (I'll open a thread for this ...)

[1] I think Path being a subclass of str is odd. There are a lot of 
string-operations that don't fit to path (some of them should be 
implemented in a different way e.g. __mul__ if at all).
However the point with the old os function etc. is very sound. So it 
might be a good idea to have Path being a subclass of str *for 
transition*. But finally all those functions should call str(argument) 
instead of of demanding a str-object as argument (if they don't already 
today).
This determines Path.__str__ to return a valid path-string.
Path's constructor should be able to use such a string.
(when there are Path-Classes for other stuff like URLs we maybe need a 
factory ...)


[21] I think file-paths and directory-paths shouldn't be the same class 
(they have different meaning. Think about a "walk"-function for dirs)
But it might be hard if the path doesn't exist, how to decide whether 
it's a file-path or a dir-path?
You could do the follwing (for Unixes): if its string-representation 
ends with '/' it's a directory otherwise it's a file.
Bash is autocompleting this way but "cd /home" is valid to and would 
cause trouble with this algorithm.
(If the path exists it's easier)

file-path and directory-path should have a common superclass.


There seems to be a distinction between existing and non-existing paths. 
Probably a lot of things shared between file-paths and directory-paths 
are valid for non-existing-paths.


"about a path object that happens to have the ability to do file
system operations in appropriate circumstances" [John Roth]
This is a good thing but I think there are problems: maybe the given 
path does not exist.


This takes me to my last point:
What about invalid paths?
Should Path-Class take care of always being a valid path (this doesn't 
necessarily mean a path of an existing file/directory)
Especially if someone uses string-methods on a Path-object there could 
arise invalid paths, even if finaly the path is valid again.
The validity of filesystem-paths is os/filesystem dependendt.



Christoph Becker-Freyseng





From no at spam.invalid  Mon Jan  5 13:53:51 2004
From: no at spam.invalid (Russell E. Owen)
Date: Mon, 05 Jan 2004 10:53:51 -0800
Subject: Tkinter and OS X 10.3?
References: <bs7pt0$a98$1@panix1.panix.com>
	<bsa4al$bik$1@nntp6.u.washington.edu>
	<a5415304.0312231450.6a481341@posting.google.com>
	<bsannb$n0e$1@nntp6.u.washington.edu>
	<a5415304.0312241644.59cedac2@posting.google.com>
	<7ba1cb43.0312301205.30156acf@posting.google.com>
Message-ID: <btcbrv$fl4$1@nntp6.u.washington.edu>

In article <7ba1cb43.0312301205.30156acf at posting.google.com>,
 parki at whatevernot.com (Brian Parkinson) wrote:

>I have tried to get Tkinter working on my Mac (OS X 10.3). I installed
>MacPython 2.3 and the TclTkAquaBI-8.4.2.0.dmg.
>
>When I type:
>
>import Tkinter
>r = Tkinter.Tk()
>
>I get a window all right, but clicking on the window causes the
>following error:
>
>SetFrontProcess failed,-606
>
>the window can't properly get focus.
>
>Had same problem when I tried the example Tk application that comes
>with nltk (Natural Language Toolkit).
>
>Any ideas?

You are almost certainly typing python instead of pythonw at the 
terminal prompt. This results in exactly the error described. (I'm not 
sure why there are two commands instead of python doing whatever extra 
magic pythonw does.)

-- Russell


From q2n8byu02 at sneakemail.com  Tue Jan  6 22:09:19 2004
From: q2n8byu02 at sneakemail.com (Ivan Nestlerode)
Date: 6 Jan 2004 19:09:19 -0800
Subject: KeyboardInterrupt and threading
References: <a6562e06.0401021352.65aac82b@posting.google.com>
	<XhEJb.40848$DC4.32293@fe2.texas.rr.com>
Message-ID: <a6562e06.0401061909.edb24c8@posting.google.com>

"Paul McGuire" <ptmcg at austin.rr.com> wrote in message news:<XhEJb.40848$DC4.32293 at fe2.texas.rr.com>...
> Is the signal module not available to you?
> <snip>
> Assuming you have access to the signal module:
> 1. Create a boolean that you can periodically test for in your thread code,
> to see if you should keep processing.  This may be a global singleton, a
> global boolean, or something, but it needs to be visible to both the main
> thread and the threaded code.  You probably have some compute intensive
> loops such as:
>     while( prime_factors < 1e15 ):
> or
>     while( optimization != converged ):
> or even just
>     while( True ):
> 
> Change these to reference the "keep processing" flag.
>     while( keep_processing and prime_factors < 1e15 ):
> or
>     while( keep_processing and optimization != converged ):
> or even just
>     while( keep_processing ):  # no need to 'and' with True
> 
> 2. Create a signal handler to trap for SIGINT. In the signal handler, set
> the "keep-processing" bit to False:
> 
> <snip>
> 
> Now your main thread will get the ^C interrupt and clear the
> "keep_processing" flag, which will eventually get picked up by your worker
> thread the next time it tests for it.
> 
> HTH,
> -- Paul

I do have the signal module (Python 2.3.2 on Linux), but
unfortunately, even registering a signal handler doesn't fix the
problem where busy non-main threads prevent Ctrl-C from working.

Here is another code snippet using a signal handler (this code is very
similar to the code from my second post). If the main thread's loop
has the print statement, everything works fine. If it is commented out
(as written here), Ctrl-C is ignored completely and the program just
keeps running. Why won't this work? Is this a bug?

Thanks,
-Ivan

#!/usr/bin/python

from signal import signal, SIGINT
from threading import Event, Thread
from time import sleep

class CpuHogThread(Thread):
    def __init__(self):
        Thread.__init__(self)
        self.counter = 0
        self.stopEvent = Event()

    def join(self):
        self.stopEvent.set()
        Thread.join(self)

    def run(self):
        try:
            while not self.stopEvent.isSet():
                self.counter += 1
        except KeyboardInterrupt:
            print 'CPU hog subthread caught KeyboardInterrupt'

def handler(signal, frme):
    stopEvent.set()
    print 'main thread SIGINT handler'
    t.join()
    print 'CPU hog subthread joined at counter %d' % t.counter
    return 0

if __name__ == '__main__':
    stopEvent = Event()
    signal(SIGINT, handler)
    t = CpuHogThread()
    t.start()

    print 'CPU hog subthread spawned'
    try:
        while not stopEvent.isSet():
            sleep(2)
            # without the next print, Ctrl-C is completely ignored
            #print 'still sleeping'
    except KeyboardInterrupt:
        print 'main thread caught KeyboardInterrupt'
        t.join()
        print 'CPU hog subthread joined at counter %d' % t.counter


From claird at lairds.com  Mon Jan  5 11:45:18 2004
From: claird at lairds.com (Cameron Laird)
Date: Mon, 05 Jan 2004 16:45:18 -0000
Subject: Python for Embedded Devices?
References: <efa6f675.0401021920.3bffced0@posting.google.com>
	<4f0a9fdb.0401042307.1f6bd4e8@posting.google.com>
	<btb918$f61$1@newsreader.mailgate.org>
	<33b7435c.0401050722.3b01a3d0@posting.google.com>
Message-ID: <vvj54ulg21mt02@corp.supernews.com>

In article <33b7435c.0401050722.3b01a3d0 at posting.google.com>,
Dave <googlegroups at thuswise.com> wrote:
>What about cases where the OS shields you from porting issues?
>
>This is a question which interests me at the moment, as I'm
>considering some future embedded work.
>
>Python is available as a package for NetBSD. To what extent
>does this mean that, if you can install NetBSD, you can run
>a Python interpreter?
			.
			.
			.
I'm quite confident that a good NetBSD installation will be
able to run (core) Python nicely.  Was that your question?
While I haven't used NetBSD myself on any interesting hard-
ware, all my experience tells me the combination will be
robust.
-- 

Cameron Laird <claird at phaseit.net>
Business:  http://www.Phaseit.net


From pycon at python.org  Mon Jan 26 10:02:13 2004
From: pycon at python.org (Aahz)
Date: Mon, 26 Jan 2004 10:02:13 -0500
Subject: PyCon sprints: sign up now!
Message-ID: <20040126150212.GA26785@panix.com>

We're starting the process of pulling PyCon sprints together, and we want
to know whether *you* are going to volunteer.  The PSF is sponsoring the
sprints, so all registered PyCon attendees can work on sprints for free.

To let the sprint organizers know who's interested, sign up on the
sprint wiki:

http://www.python.org/cgi-bin/moinmoin/SprintPlan2004


PS: Don't forget to register!  Early bird ends Jan 31!

PPS: Donate money to the PSF at http://www.python.org/psf/donations.html



PyCon is a community-oriented conference targeting developers (both those
using Python and those working on the Python project).  It gives you
opportunities to learn about significant advances in the Python
development community, to participate in a programming sprint with some
of the leading minds in the Open Source community, and to meet fellow
developers from around the world.  The organizers work to make the
conference affordable and accessible to all.

DC 2004 will be held March 24-26, 2004 in Washington, D.C.  The keynote
speaker is Mitch Kapor of the Open Source Applications Foundation
(http://www.osafoundation.org/).  There will be a four-day development
sprint before the conference.

We're looking for volunteers to help run PyCon.  If you're interested,
subscribe to http://mail.python.org/mailman/listinfo/pycon-organizers

Don't miss any PyCon announcements!  Subscribe to
http://mail.python.org/mailman/listinfo/pycon-announce

You can discuss PyCon with other interested people by subscribing to
http://mail.python.org/mailman/listinfo/pycon-interest

The central resource for PyCon DC 2004 is
http://www.pycon.org/
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

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



From wweston at att.net  Wed Jan 28 10:22:05 2004
From: wweston at att.net (wes weston)
Date: Wed, 28 Jan 2004 15:22:05 GMT
Subject: Confused about a list.sort()
In-Reply-To: <S6FRb.2098$P17.1139@fed1read03>
References: <S6FRb.2098$P17.1139@fed1read03>
Message-ID: <xsQRb.28535$6O4.748063@bgtnsc04-news.ops.worldnet.att.net>

Amy,
    Switch from windoze to linux and provide screen dumps.

wes at linux:~> python
Python 2.3.3c1 (#3, Dec 26 2003, 16:36:50)
[GCC 3.3.1 (SuSE Linux)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
 >>> list = [3,9,2]
 >>> list.sort()
 >>> list
[2, 3, 9]



Amy G wrote:
> I have a list of numbers... actully I have two lists, List 1 is a list of
> number strings and List2 is one of numbers.
> 
> List 1 example:
> List1 = [ '20040124123000', '20040124123001', '20040125012456']
> 
> List 2 example:
> List2 = [ 20040124123000L, 20040124123001L, '20040125012456L]
> 
> When I try either:
> List1 = List1.sort ... or
> List2 = List2.sirt
> 
> and then...
> print List1... or
> print List2
> 
> I get None.
> 
> Why is this?
> How do I remedy this problem?
> 
> 



From afriere at yahoo.co.uk  Wed Jan 14 22:46:02 2004
From: afriere at yahoo.co.uk (Asun Friere)
Date: 14 Jan 2004 19:46:02 -0800
Subject: best book
References: <mailman.372.1074117050.12720.python-list@python.org>
	<t1kb0011sp7p3804ueoujjjeihsu1tkb2m@4ax.com>
Message-ID: <38ec68a6.0401141946.70fa3aa5@posting.google.com>

Terry Carroll <carroll at tjc.com> wrote in message news:<t1kb0011sp7p3804ueoujjjeihsu1tkb2m at 4ax.com>...
> On Thu, 15 Jan 2004 03:32:31 +0530, km <km at mrna.tn.nic.in> wrote:

> My favorite to start is O'Reilley's "Learning Python."
> 
> Try to borrow it, rather than buy it, though, or at least buy a used copy.


The problem with that is that a used or borrowed copy is unlikely to
be the (new) 2nd edition, (see
http://www.oreilly.com/catalog/lpython2/) which covers up to Python
2.3.  (The older version is badly outdated).  Besides which, if you
actually buy a copy they might consider a 3rd edition at some time in
the future.


From DavidSegall at nowhere.net  Fri Jan  9 11:05:58 2004
From: DavidSegall at nowhere.net (David Segall)
Date: Fri, 09 Jan 2004 16:05:58 GMT
Subject: [OT] Database reporting software
References: <btki05$7d0$1@news.freedom2surf.net>
Message-ID: <arhtvvkc7riqdmoct85plvf7i5i9fim6ql@4ax.com>

Steve Horsley <shoot at the.moon> wrote:

>I have an existing system working on MS Access, and software that 
>regularly logs events into it (and deletes old events after a year).
>
>Now need to move to real servers, probably Solaris though possibly 
>Linux. Modifying the software to update the database (maybe mySQL or 
>Oracle) contents is easy enough, but how do I produce reports 
>(statistics and summaries) on the database contents?
>
>I could contemplate web based or application based report generation, 
>but are there easy to use draggy-droppy report designing applications 
>around? Just the names would enable me to look them up.
>
>I am struggling with OpenOffice.org at the moment, trying to see if it 
>can do what I'm looking for, but it doesn't seem to be able to do GROUP 
>BY and SUM() - simple aggregation stuff.
>
>All suggestions would be very welcome.
>
>Steve
If your new database has an ODBC driver the easiest solution would be
to keep your existing Access reporting by linking the tables to an
Access database running on a Windows machine. Oracle definitely
provides an ODBC driver as does the open source PostrgreSQL. I don't
know about mySQL.

If that is not desirable then Crystal Reports
(http://www.businessobjects.com/products/reporting/crystalreports/default.asp)
may be the answer. I hate coding reports using Crystal Reports but I'm
sure that you can, eventually, produce any conceivable report using
it. I don't think it is available under Linux or Solaris but it could
connect from a Windows machine to a database running on a Linux or
Solaris server.

If you want a machine and operating system independent report writer
the most polished open source, portable solution I have come across is
the combination of iReport (http://ireport.sourceforge.net/) and
JasperReports (http://sourceforge.net/projects/jasperreports/).


From paul.moore at atosorigin.com  Tue Jan  6 18:05:50 2004
From: paul.moore at atosorigin.com (Paul Moore)
Date: Tue, 06 Jan 2004 23:05:50 +0000
Subject: PEP 324: popen5 - New POSIX process module
References: <mailman.149.1073407682.12720.python-list@python.org>
Message-ID: <65fou181.fsf@yahoo.co.uk>

Peter Astrand <astrand at lysator.liu.se> writes:

>> I've read the PEP, and I'd like to help with an implementation for
>> Windows, if no-one else is doing it. 
>
> Help is always appreciated. I haven't got very far yet. It might be useful 
> to look at http://starship.python.net/~tmick/#process as well (but we 
> should really try to get a smaller code base than this). 

I've got a (so far *very* basic) implementation which works. I'll have
a think about some of the issues which came up when I was writing it,
and write up some notes.

Paul
-- 
This signature intentionally left blank


From michael at foord.net  Tue Jan 13 03:53:03 2004
From: michael at foord.net (Fuzzyman)
Date: 13 Jan 2004 00:53:03 -0800
Subject: urllib - changing the user agent
References: <8089854e.0401090509.3dd74859@posting.google.com>
	<n20uvvshb3mnj53qlbfto1fofamnomj88g@4ax.com>
	<871xq8ri6h.fsf@pobox.com>
	<pan.2004.01.09.21.16.06.156445@yahoo.com>
	<87eku7y9zj.fsf@pobox.com>
Message-ID: <8089854e.0401130053.4c776e8f@posting.google.com>

Thanks to all who posted help.
I think theres more than enough to get me through this - when I get a
chance I'll sit and have a play. I'm sure I'll have more
questions.......

Thanks

Fuzzy

jjl at pobox.com (John J. Lee) wrote in message news:<87eku7y9zj.fsf at pobox.com>...
> Samuel Walters <swalters_usenet at yahoo.com> writes:
> 
> > |Thus Spake John J. Lee On the now historical date of Fri, 09 Jan 2004
> > 20:16:54 +0000|
> >  
> > > or again, you can set .addheaders on OpenerDirector (which will cause
> > > those headers to be added to all requests).
> 
> (just to clarify, I meant an OpenerDirector instance, not the class
> itself)
> 
> 
> > This, however, does not stop the original User-agent header to be sent,
> > and google still filters out the request.  Instead, it just causes a
> > second user-agent to be sent.
> 
> No, it does stop them being sent.  Perhaps you mutated the base class
> .addheaders by mistake (using .append(("User-agent", "blah")), for
> example)?  Don't do that!  Mutating class attributes is a bad idea.
> 
> 
> > Here is the very bad code I used to solve this problem.  There are better
> > ways, I assure you, but it should point you in the right direction.  You
> [...]
> 
> No need to assure me of *that* <wink>.  You can call a base class
> constructor directly, you know.  And clobbering the base class'
> constructor is another very bad idea.
> 
> 
> John


From abulka at netspace.net.au  Mon Jan  5 21:48:32 2004
From: abulka at netspace.net.au (Andy Bulka)
Date: 5 Jan 2004 18:48:32 -0800
Subject: UML tools for python
References: <13dc97b8.0312301543.39192aa2@posting.google.com>
	<slrnbvisrm.3oo.alf@largo.fayauffre.org>
Message-ID: <13dc97b8.0401051848.11205ed4@posting.google.com>

Alexandre Fayolle <alf at calvin.fayauffre.org> wrote in message 
> Well, I think the first thing you could do if you have specific problems
> with any of the tools you mention is getting in touch with the
> developers, and try to talk with them. Since we've never heard of your
> problems with pyreverse, there's hardly any chance that we will do
> anything for you. 

I *have* reported numerous problems with pyreverse to your mailing
list.  Why do you say I haven't?  Specifically:

 Jun 2003 DOCTYPE XMI directive and MSXML3 parser
 Feb 2003 Running the latest version locks up when no -d option
 Feb 2003 Pyreverse 0.4.2 requires logilab.common and
optik.OptionParser ?
 Dec 2002 Fwd: [Gentleware #12069] Poseidon - version 1.5 XMI import
prob.

and many more before that.  And I appreciate you guys responding -
great!

> But just saying "all existing tools suck, we (i.e., I) need someone to 
> build some cool free tool with <big list of features>" won't get you
> anywhere. 

The purpose of my post was not an idle 'newbie' post - I have been
watching this area for a number of years and have provided the urls in
this thread - partly as a service to the python community and also,
yes, as a bit of a complaint about the limitations of each of the
existing tools.

As for contributing something myself:

 - A source forge project I set up quite a while ago but its just an
idea at this stage http://sourceforge.net/projects/pyidea/

 - A robust python parser written by me which doesn't rely on the
fragility of __import__ see PyNSource 
http://www.atug.com/andypatterns/pynsource.htm

 - A Delphi (windows only) GUI front end to PyReverse currently
unreleased

 - My post in this thread researching and listing all UML tools for
python that I know. Hopefully people will get ideas from this.

Anyway - ideally I was hoping for a robust discussion by senior Python
people on what they may be using with regards to UML and what their
feelings are about the situation. UML is very important yet there is
no GUI driven two-way tool for python programmers.  Surely serious,
larger scale, software development in Python would want to be using
UML as part of the process?

Andy Bulka
http://www.atug.com/andypatterns


From stach at fr.USUN.pl  Fri Jan  9 18:11:01 2004
From: stach at fr.USUN.pl (Krzysztof Stachlewski)
Date: Sat, 10 Jan 2004 00:11:01 +0100
Subject: Python is far from a top performer according to benchmark
	test...
References: <ryELb.238$tK2.228@amstwist00> <btn5db$2f8$1@absinth.dialog.net.pl>
	<Xns946BE66E88E82JanC@213.119.4.35>
Message-ID: <btnc8q$696$1@absinth.dialog.net.pl>

"JanC" <usenet_spam at janc.invalid> wrote in message
news:Xns946BE66E88E82JanC at 213.119.4.35...
> "Krzysztof Stachlewski" <stach at fr.USUN.pl> schreef:
>
> I think all (or at least most) of the tested compilers, VMs, etc. were
> written in C/C++, and thus are using libraries written in C/C++...

Well, yes.
Whether or not you can say that a piece of code
is *really* implemented in a chosen language and not
in "the language that this language is implemented in" ;-)
is a matter of scale.

I just think that the Numeric package
is not the best example of the speed of Python itself.

Stach



From bhan at andrew.cmu.edu  Wed Jan 14 13:54:57 2004
From: bhan at andrew.cmu.edu (Benjamin Han)
Date: Wed, 14 Jan 2004 13:54:57 -0500 (EST)
Subject: Scripts for parsing Received: headers in emails
Message-ID: <Pine.LNX.4.58-035.0401141348390.6623@unix41.andrew.cmu.edu>

A while ago I asked if anyone knows a module for parsing Received: headers
in emails. Apparently my guess was wrong (that someone already wrote it in
Python). I got an email pointing me to Spambayes project, however the tokenizer
doesn't seem like doing a lot on the Received headers (especially when
comparing to SpamAssassin's code).

So I wrote a small set of scripts for doing this:

http://www.cs.cmu.edu/~benhdj/Code/receivedDB.v0_1-20040114.tar.gz

It's based on SpamAssassin's Received.pm script, but I separated patterns
from the code. Patterns of all known headers are kept in a text database
file so new entries can be added without touching anything else.

I hope this is useful to someone else too - and of course any patch to
increase the coverage of the database is welcome!


Ben


From aahz at pythoncraft.com  Fri Jan  9 13:34:06 2004
From: aahz at pythoncraft.com (Aahz)
Date: 9 Jan 2004 13:34:06 -0500
Subject: Tcl/Tk Support
References: <mailman.231.1073668582.12720.python-list@python.org>
Message-ID: <btms6u$9rr$1@panix2.panix.com>

In article <mailman.231.1073668582.12720.python-list at python.org>,
Diego.andrade <diego.andrade at smartech.com.br> wrote:
>
>Im not a Python programer, but I need to use Python on some aplications CVS
>related. Im trying to install ViewCVS who need Tkinter library. But It
>doesnt Work. Im using RedHat 9 Default Installation, to test if Tcl/Tk
>suport for Python is working I Type in the Python console import tkinter and
>received the following output:
>
>[root at Diego-Linux root]# python
>Python 2.2.2 (#1, Feb 24 2003, 19:13:11)
>[GCC 3.2.2 20030222 (Red Hat Linux 3.2.2-4)] on linux2
>Type "help", "copyright", "credits" or "license" for more information.
>>>> import tkinter
>Traceback (most recent call last):
>File "<stdin>", line 1, in ?
>ImportError: No module named tkinter
>>>>

What happens when you type "import Tkinter" (note initial capital)
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

A: No.
Q: Is top-posting okay?


From guettli at thomas-guettler.de  Thu Jan 15 02:25:31 2004
From: guettli at thomas-guettler.de (Thomas Guettler)
Date: Thu, 15 Jan 2004 08:25:31 +0100
Subject: best book
References: <mailman.372.1074117050.12720.python-list@python.org>
Message-ID: <pan.2004.01.15.07.25.23.217095@thomas-guettler.de>

Am Thu, 15 Jan 2004 03:32:31 +0530 schrieb km:

> Hi all,
> 
> What is the best book to start with python ? i am have been working since 1 yr with Perl. 

Since you already know perl, I suggest the Python Cookbook.
A lot of examples!

 thomas


From elainejackson7355 at home.com  Sun Jan 25 22:59:04 2004
From: elainejackson7355 at home.com (Elaine Jackson)
Date: Mon, 26 Jan 2004 03:59:04 GMT
Subject: quick question about IDLE
Message-ID: <cg0Rb.268478$JQ1.143697@pd7tw1no>

I've noticed that the menu in IDLE sometimes has an item called "Shell" with a
submenu that offers the opportunity to "Restart Shell". But at other times
"Shell" isn't there. Can anybody clue me in about this? TIA.

Peace




From not at all.com  Thu Jan 15 06:25:17 2004
From: not at all.com (G.I.L)
Date: Thu, 15 Jan 2004 13:25:17 +0200
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
	<40047290$1@news.012.net.il>
	<bu29ea$ct54l$1@ID-207230.news.uni-berlin.de>
	<40051cb3$1@news.012.net.il>
	<bu4cm9$dgsp0$1@ID-207230.news.uni-berlin.de>
Message-ID: <40067838$1@news.012.net.il>

Brandon J. Van Every wrote:
> "G.I.L" <not at all.com> wrote in message
> news:40051cb3$1 at news.012.net.il...
>> Brandon J. Van Every wrote:
>>> "G.I.L" <not at all.com> wrote in message
>>> news:40047290$1 at news.012.net.il...
>>>> It
>>>> was an unbelievable waste of time, since you've managed to convice
>>>> (maybe still wrongfully) all the people that you are completely
>>>> clueless.
>>>
>>> Why, because I turned around a project in 3 weeks while having the
>>> flu half the time?
>>
>> No, because you dumped the project because it was boring.
>
> You're a fool then.  What's your school of advice, keep working on
> things no matter how much of a boring waste of time they become?

No, you should evaluate the gain/loss ratio on every project you consider
working on. You seemed to give it all justifications before starting to work
on it, and can it completely after a very short amount of time. Either you
haven't gone deep enough, and you haven't discovered the interesting bits,
or you're a very shallow professional to have missed the boring parts of the
project. What would your advice be? Start wasting time and money on things
and can them if they appear to be boring? How about minimizing the loss by
completing something which would give you something in return, such as a
non-crashing port?

>> This may kill any credit you may have had with people.
>
> Getting "credit" was a goal?  News to me.

It's you who wanted to give advice to other people. Do you really believe
anyone would follow your advice after THIS???

>>> You try to do something big, you put your money on the line to do
>>> it, you fail or don't entirely succeed, you give postmortem, you
>>> lay all your cards out for others to examine... *then* I will worry
>>> about your opinion.
>>
>> You state that you will follow only those who fail after putting
>> their own money on projects?
>
> Read it again, and put up or shut up.  If you don't have the balls to
> allow postmortems of your *own* projects, don't expect me to care
> about your flak.

Wow, you do have a thick skin, dontcha? How about listening to advice from
others for a change? Is it just possible that you're trying to discovering
the right trail on the wrong road?

Ok, I'll bite. I just invested 0$ on a 3D shooter. I started working on it,
and the math was too hard. I gave up after 5 minutes. Do I qualify?

g




From tzot at sil-tec.gr  Tue Jan 13 12:36:51 2004
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Tue, 13 Jan 2004 19:36:51 +0200
Subject: Tix and Grid widget
Message-ID: <tf98005tg5u3huvip4nb8sqttdabdq4brj@4ax.com>

It seems strange that so many people have requested for the
functionality of a grid widget (like the wxTable, I believe, in
wxWindows), and none has offered to add the necessary code in Tix.py to
make it available (for those who have installed tix, of course).

Apart from the http://www.python.org/doc/life-preserver/ documentation
(the Tkinter quick reference), the Tix.py and Tkinter.py files from the
source tree, and http://tix.sourceforge.net/man/html/TixCmd/tixGrid.htm
(the tixGrid manual page), does anyone have any other hints for
resources that might help me update Tix.py ?

Thanks in advance.
-- 
TZOTZIOY, I speak England very best,
Ils sont fous ces Redmontains! --Harddix


From swalters_usenet at yahoo.com  Thu Jan  8 23:41:42 2004
From: swalters_usenet at yahoo.com (Samuel Walters)
Date: Fri, 09 Jan 2004 04:41:42 GMT
Subject: Lua: further investigation and comparisons with Python and Forth
References: <mailman.208.1073620471.12720.python-list@python.org>
Message-ID: <pan.2004.01.09.04.40.25.626208@yahoo.com>

|Thus Spake John Benson On the now historical date of Thu, 08 Jan 2004
19:54:12 -0800|
> Before reading about Open Firmware, I had assumed that Forth had
> completely dropped out of sight. Anyone else aware of counterexamples?

I know that Sun systems have a forth based boot system.

Sam Walters.

-- 
Never forget the halloween documents.
http://www.opensource.org/halloween/
""" Where will Microsoft try to drag you today?
    Do you really want to go there?"""



From Pieter.Claerhout at Creo.com  Sun Jan 11 10:25:09 2004
From: Pieter.Claerhout at Creo.com (Pieter Claerhout)
Date: Sun, 11 Jan 2004 16:25:09 +0100
Subject: Oracle to Mysql (dates) Help please
Message-ID: <490316A24CC5D411ACD700B0D078F7F003915D6D@cseexch01.cse.creoscitex.com>

What your seeing in the insert statement is not a string, but is a DateTime
object, which needs to be converted to the correct representation for the
target database.

Prepared statements are the best option here. With prepared statements, the
data conversion happens automagically.

The code will then look as follows:

## BEGIN CODE
import cx_Oracle
import MySQLdb

tabellen = [ 'machine' ]

connO = cx_Oracle.connect( 'bla/bla' )
cursO = connO.cursor()
connM = MySQLdb.Connect( 'localhost', db='bla' )
cursM = connM.cursor()

for tabel in tabellen:
    print tabel
    cursO.execute( 'select * from ' + tabel )
    results = cursO.fetchall()
    cursM.execute_many(
        'insert into ' + tabel + ' values ( %s,%s,%s,%s,%s )',
        results
    )
# END CODE

A few notes:
- This uses the execute_many function which will speed up the insert process
quite a lot.
- Instead of fetching one record at a time, all records are fetched at once.
- The number of "%s" in the insert statement will depend on the number of
columns in the target table. You could look at the first row of the results
variable to know how many columns there are in the table.
- The type of placeholders in the SQL statement depend on the database.

More info on execute_many and other can be found on:
http://www.python.org/peps/pep-0249.html (look for paramstyle and
execute_many).

Cheers,


pieter

Creo
pieter claerhout | product support prinergy | tel: +32 2 352 2511 |
pieter.claerhout at creo.com | www.creo.com

IMAGINE CREATE BELIEVE(tm)


-----Original Message-----
From: duikboot [mailto:ad at ad.nl] 
Sent: 11 January 2004 14:32
To: python-list at python.org
Subject: Oracle to Mysql (dates) Help please


Hi all,

I'm trying to export a view tables from a Oracle database to a Mysql
database.  I create insert statements (they look alright), but it all goes
wrong when I try to execute them in Mysql, because the dates must have
quotes on each side.
I just don't know how make the dates right.
Well I'll just show you the code and some insert statements it generates.
Could anyone please help me?

Thanks,

Arjen

####Code####

import cx_Oracle
tabellen=["machine"]
con_oracle=cx_Oracle.connect("bla/bla")
c_oracle=con_oracle.cursor()

import MySQLdb
my=MySQLdb.Connect("localhost", db="bla")
my_mysql=my.cursor()
for tabel in tabellen:
    print tabel
    c_oracle.execute("select * from %s" % tabel)
    a_oracle=c_oracle.fetchone()
    #file=open("%s.sql" % tabel, 'w')
    while a_oracle != None:
        b=str(a_oracle)
        ins="insert into %s values %s;\n" % (tabel, b)
        #file.write(ins)
     my_mysql.execute(ins)
        #print ins

        a_oracle=c_oracle.fetchone()
    file.close()

con_oracle.close()

my.close()


##insert statement###

insert into machine values ('230KM', ' ', '230KM', 1980-01-01 00:00:00,
2035-01-01 00:00:00, 1, 100, 'asap', 'NO', 0, 0, 'corrugator', 2003-12-04
06:00:00, 1970-01-01 01:00:00, ' ', 'normal', 0.0, 0.0, 7, ' ', ' ',
'normal', ' ', ' ', 'A', 2003-12-04 09:42:14, 82766);


-- 
http://mail.python.org/mailman/listinfo/python-list



From omission9 at invalid.email.info  Sat Jan 24 03:49:25 2004
From: omission9 at invalid.email.info (omission9)
Date: Sat, 24 Jan 2004 08:49:25 GMT
Subject: efficient matching of elements a list
Message-ID: <pkqQb.2735$KU5.1436@nwrddc02.gnilink.net>

Suppose I have a lists of tuples
A_LIST=[(1,6,7),(7,4,2),(7,9,2),(1,5,5),(1,1,1)]
and an int
i=1
What is the fastest way in python to get out all the tuples from the 
list whose first element  is equal to i?
A have a very large list and a simple
for a in A_LIST:
     if a[0]==i:
          #We have a match!!

Seems to be very slow and there must be some super quick pythonic way to 
  do this maybe?
Any avice would be much appreciated!!



From garbagecollector86 at hotmail.com  Wed Jan 28 19:08:14 2004
From: garbagecollector86 at hotmail.com (Tom Hanks)
Date: 28 Jan 2004 16:08:14 -0800
Subject: getting files over ftp
References: <560d84ab.0401281049.18d377f3@posting.google.com>
Message-ID: <3b6f03cd.0401281608.3f6fb23a@posting.google.com>

heavens7s at hotmail.com (Joe) wrote in message news:<560d84ab.0401281049.18d377f3 at posting.google.com>...
> How can you grab files over an ftp connection using ftplib?  I can
> make the connection, browse to the directory, view directory, but
> can't copy over the files.
> 
> Thanks

def ftp_download(host, user, pswd, ftpdir, filename):
    """Downloads a single file from an FTP server"""
    ftp = ftplib.FTP()
    ftp.connect( host )
    ftp.login  ( user , pswd )
    ftp.cwd    ( ftpdir )

    f = file( filename , "wb" )
    ftp.retrbinary("RETR " + filename, f)


From james at logicalprogression.net  Wed Jan 21 12:07:24 2004
From: james at logicalprogression.net (James Henderson)
Date: Wed, 21 Jan 2004 17:07:24 +0000
Subject: problems iterating over a files lines
In-Reply-To: <200401211627.55109.james@logicalprogression.net>
References: <2835a96b.0401210800.4b89d878@posting.google.com>
	<200401211627.55109.james@logicalprogression.net>
Message-ID: <200401211707.24684.james@logicalprogression.net>

On Wednesday 21 January 2004 4:27 pm, James Henderson wrote:
> If you used file.read().splitlines() instead you would avoid the extra
> blank line.

Or even file.readlines().  D'oh!

Though this keeps the newlines on the end of each file.
-- 
James Henderson, Logical Progression Ltd.
http://www.logicalprogression.net/
http://sourceforge.net/projects/mailmanager/




From merkosh at hadiko.de  Mon Jan 19 11:14:33 2004
From: merkosh at hadiko.de (Uwe Mayer)
Date: Mon, 19 Jan 2004 17:14:33 +0100
Subject: subclassing "file"
Message-ID: <bugvp5$rvd$1@news.rz.uni-karlsruhe.de>

Hi,

when extending a build in class, what does the constructor __init__(...)
have to return?
and how does the constructor call its base-class construtor? (or is this
done automatically?)

I want to derive from "file" to create a class that reads record from a
binary file:

class myFile(file):
        def __init__(self, filename, mode="r", bufsize=-1):
                ....?...

just calling the basename and the constructor does not work:

>>> f = myFile("testfile")
>>> f
<closed file '<uninitialized file>', mode '<uninitialized file>' at ...>

What am I missing?

Thanks for your comments
Ciao
Uwe


From richie at entrian.com  Thu Jan 29 07:39:13 2004
From: richie at entrian.com (Richie Hindle)
Date: Thu, 29 Jan 2004 12:39:13 +0000
Subject: How to detect that a key is being pressed,
	not HAS been pressed earlier!??
In-Reply-To: <wu7bhno6.fsf@python.net>
References: <6ed33425.0401281103.61987e72@posting.google.com>
	<wu7bhno6.fsf@python.net>
Message-ID: <iavh10hkofp169cjekn1e8qsk2cfjm8u2l@4ax.com>


[Rune]
> It's important to notice here that I'm not interested if the user has
> already pressed shift or ctrl. I'm only interested in knowing if he is
> currently holding down one of these keys.

[Thomas]
> No idea about linux, but on windows you use win32api.GetKeyState().

You mean GetAsyncKeyState: "The GetAsyncKeyState function determines
whether a key is up or down at the time the function is called"

Not GetKeyState: "The key status returned from this function changes as a
thread reads key messages from its message queue. The status does not
reflect the interrupt-level state associated with the hardware."

...assuming, Rune, that you *really do* want the current state.  If your
program is event driven, and you're responding to Shift+Click or Ctrl+Drag
or similar, then you want GetKeyState.  Imagine the machine is running
very slowly.  I Shift+Click your app and release the Shift key before your
app responds.  You call GetAsyncKeyState and see that Shift is not
pressed.  Had you used GetKeyState, it would tell you that the Shift key
was pressed at the time of the click.

-- 
Richie Hindle
richie at entrian.com




From andymac at bullseye.apana.org.au  Tue Jan  6 17:22:17 2004
From: andymac at bullseye.apana.org.au (Andrew MacIntyre)
Date: Wed, 7 Jan 2004 09:22:17 +1100 (EST)
Subject: PEP 324: popen5 - New POSIX process module
In-Reply-To: <16E1010E4581B049ABC51D4975CEDB8803060D8E@UKDCX001.uk.int.atosorigin.com>
References: <16E1010E4581B049ABC51D4975CEDB8803060D8E@UKDCX001.uk.int.atosorigin.com>
Message-ID: <20040107091635.S36986@bullseye.apana.org.au>

On Tue, 6 Jan 2004, Moore, Paul wrote:

> From: Peter Astrand [mailto:astrand at lysator.liu.se]

> > The only drawback with "process" is that it is already in use by
> > http://starship.python.net/~tmick/#process.
>
> Ah. I wasn't aware of that module. I wonder whether Trent would be willing
> to combine his code and yours somehow, and donate the name?

There might be some logic to making this a subpackage of os (os.process ?),
which already has a doc subsection for process management functions,
rather than a separate top level module (like popen2).

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



From mir4uu at yahoo.com  Fri Jan  9 11:49:10 2004
From: mir4uu at yahoo.com (mir nazim)
Date: 9 Jan 2004 08:49:10 -0800
Subject: Twisted or Medusa or Zope
References: <425cc8d1.0401070808.14690325@posting.google.com>
	<mailman.188.1073570794.12720.python-list@python.org>
Message-ID: <425cc8d1.0401090849.27bf0d3e@posting.google.com>

thanks a lot for he4lping me out. keep ideas flowing.
its really cool group.
thanks again.


From xpythonist at yahoo.com.br  Thu Jan 22 05:30:08 2004
From: xpythonist at yahoo.com.br (=?iso-8859-1?q?Aloysio=20Figueiredo?=)
Date: Thu, 22 Jan 2004 07:30:08 -0300 (ART)
Subject: python said : "1, 2, 3, 6, 7, manbo !"
In-Reply-To: <4f0a9fdb.0401212335.481c6679@posting.google.com>
Message-ID: <20040122103008.75711.qmail@web21504.mail.yahoo.com>

Or, more idiomatically,

a = range(8)
for b in a[:]:
   ...

:)

Aloysio


 --- Miki Tebeka <miki.tebeka at zoran.com> escreveu: >
Hello Rodrigo,
> > >>> a = range(8)
> > >>> for b in a:
> > 	if b == 4:
> > 		a.remove(b)
> > 	else:
> > 		print b
> try:
> a = range(8)
> for b in list(a): # Iterate over a shallow copy
>     if b == 4:
>         a.remove(b)
>     else:
>         print b
> 0
> 1
> 2
> 3
> 5
> 6
> 7
> 
> HTH.
> Miki
> -- 
> http://mail.python.org/mailman/listinfo/python-list 

______________________________________________________________________

Yahoo! GeoCities: a maneira mais f?cil de criar seu web site gr?tis!
http://br.geocities.yahoo.com/



From mcfletch at rogers.com  Fri Jan  9 08:50:57 2004
From: mcfletch at rogers.com (Mike C. Fletcher)
Date: Fri, 09 Jan 2004 08:50:57 -0500
Subject: debugging makes a person a better programmer
In-Reply-To: <3ffea564$0$296$ba620e4c@news.skynet.be>
References: <3ffea564$0$296$ba620e4c@news.skynet.be>
Message-ID: <3FFEB1C1.2000700@rogers.com>

broebel wrote:

>I'm just wondering,
>
>people tell me that helping to debug someone elses program is a really good
>way to learn to understand the language it's programmed in.
>  
>
One of the reasons that "debugging as learning" is often useful is that 
many modern systems are large, complex collections of loosely coupled 
components.  Zope, for instance, is almost impossible to grok fully 
without spelunking through with a debugger to see what actually happens 
with the security machinery, the traversal machinery, etceteras.  The 
debugging gives you a guide to "where to start reading the code".  Keep 
in mind that in these situations, you're not actually looking for bugs, 
you're just using the debugging tool to figure out what's going on under 
the covers.

As to the actual suggestion of trying to fix bugs to learn.  It can be a 
good way, but it really does need a mentor to make it an efficient 
operation.  If you want to pursue it, look at the bug-tracker for the 
project in which you're interested (this is particularly easy with 
SourceForge-hosted projects), and choose something that seems small.  
Email the developers of the project to let them know you'll be playing 
with the bug, (let them know that you're a new-ish developer).

Depending on the maturity and size of the projects, you may even find 
"how to get started hacking on X" documentation hanging around.  
Otherwise you'll often need to talk with the developers to make any real 
headway.  The developers of the project may even have a suggestion for 
what bug would be an appropriate first step.  If you're lucky, the 
developers will have failure-case code available (i.e. unit-tests) so 
that you can know when you've succeeded :) .

>My question is: from wich point of can someone start to try to help a
>programmer by debugging or testing a program.
>
>If indeed you already need a profound knowledge of the language than how can
>you learn something about it? except for the fact that you see other
>possibilities of way to programm.
>  
>
One of the ways that people often suggest is to read (and then play 
with) small samples of really well-written code.  The Python Cookbook 
(both the dead-trees and the online versions) is designed for this kind 
of learning.  This code will tend to have fairly low defect rates, but 
it is, in essence, a collection of the "verse literature" (poetry) of 
the language (where projects such as Zope or Twisted is the "prose 
literature", i.e. long-form/novels).

Personally, I'd suggest studying short-form examples of the art first 
(i.e. poetry), they tend to be easier to keep entirely within the mind, 
and will tend toward more varied expressions of what can be done.  Once 
you've been exposed to the possibilities, try spelunking through the 
larger and more heavily structured projects (e.g. Twisted, Zope).

Have fun, and good luck,
Mike

_______________________________________
  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://members.rogers.com/mcfletch/






From __peter__ at web.de  Tue Jan  6 04:14:58 2004
From: __peter__ at web.de (Peter Otten)
Date: Tue, 06 Jan 2004 10:14:58 +0100
Subject: tuple.__hash__()
References: <pan.2004.01.06.08.17.30.910345@thomas-guettler.de>
Message-ID: <btdu2m$is6$04$1@news.t-online.com>

Thomas Guettler wrote:

> I want to unique a list of tuples. Since
> __hash__ returns a 32 bit integer, there
> could be a situtation where two different tupples
> return the same value.

Maybe you can decorate/uniquify/undecorate?

>>> items = [t1, t2, t1, t1]
>>> di = [(id(i), i) for i in items]
>>> from sets import Set
>>> si = Set(di)
>>> ui = [i[1] for i in si]
>>> ui
[(1, 2, 3), (1, 2, 3)]

> Is there a dictionary type which uses __cmp__() like
> btrees in the standard library?

I don't understand. For the above example an algorithm based on __cmp__()
would return a list with a single item which does not seem to be what you
want.

Peter


From exarkun at intarweb.us  Fri Jan 23 10:31:10 2004
From: exarkun at intarweb.us (Jp Calderone)
Date: Fri, 23 Jan 2004 10:31:10 -0500
Subject: Is twistedmatrix.com dead?
In-Reply-To: <182bcf76.0401230624.7e468275@posting.google.com>
References: <182bcf76.0401230624.7e468275@posting.google.com>
Message-ID: <20040123153110.GA1911@intarweb.us>

On Fri, Jan 23, 2004 at 06:24:17AM -0800, Paul Moore wrote:
> I haven't been able to get through to twistedmatrix.com for a few days
> now. I know they had a problem a couple of days ago, but is there
> still a problem, or has something at between me and them simply failed
> to notice they are back?

  Expect it back late monday or early tuesday.

  Jp

> 
> Thanks,
> Paul
> -- 
> http://mail.python.org/mailman/listinfo/python-list
> 



From aa at bb.cc  Tue Jan 27 10:11:19 2004
From: aa at bb.cc (Ladvánszky Károly)
Date: Tue, 27 Jan 2004 15:11:19 GMT
Subject: Problem with RE matching backslash
Message-ID: <7b5e60b8754ab5afcea58d4ecc8b8849@news.meganetnews.com>

What is the correct way to match/search a backslash with regular
expressions?

print re.match('\\m', '\\m').group(0)  raises an error while
print re.search('\\m', '\\m').group(0) yields 'm'

print re.search('\\m', '\m').group(0) yields 'm'
print re.search('\\m', 'm').group(0) yields  'm'

Any helpful comment on this would be appreciated,

K?roly




From swalters_usenet at yahoo.com  Thu Jan  8 13:25:33 2004
From: swalters_usenet at yahoo.com (Samuel Walters)
Date: Thu, 08 Jan 2004 18:25:33 GMT
Subject: What psyco is goot at [Was: Rookie Speaks]
References: <3FFC9855.3070901@lawson.com>
	<pan.2004.01.07.23.38.51.236836@yahoo.com>
	<3FFC9A22.3020507@lawson.com>
	<pan.2004.01.08.00.03.13.66828@yahoo.com>
	<tyfsmiqg1qi.fsf_-_@pcepsft001.cern.ch>
Message-ID: <pan.2004.01.08.18.24.09.555980@yahoo.com>

|Thus Spake Jacek Generowicz On the now historical date of Thu, 08 Jan
2004 11:43:01 +0100|

> Samuel Walters <swalters_usenet at yahoo.com> writes:
> 
>> If you'd like to see an example of both the psyco and profile modules
>> in action, let me know and I'll give you some more understandable code
>> that I once wrote to see what types of things psyco is good at
>> optimizing.
> 
> I think this is generally interesting, and would be curious to see it,
> if you'd care to share.

Sure thing.  The functions at the top are naive prime enumeration
algorithms.  I chose them because they're each of a general "looping"
nature and I understand the complexity and methods of each of them.  Some
use lists (and hence linearly indexed) methods and some use dictionary( 
and hence are has bound). One of them, sieve_list is commented out because 
it has such dog performance that I decided I wasn't interested in 
how well it optimized.

These tests are by no means complete, nor is this probably a good example
of profiling or the manner in which psyco is useful.  It's just from an
area where I understood the algorithmic bottlenecks to begin with.

Sam Walters.

-- 
Never forget the halloween documents.
http://www.opensource.org/halloween/
""" Where will Microsoft try to drag you today?
    Do you really want to go there?"""

from math import sqrt
def primes_list(Limits = 1,KnownPrimes = [ 2 ]):
        RetList = KnownPrimes
        for y in xrange(2,Limits + 1):
                w = y
                p, r = 0,0
                for x in RetList:
                        if x*x > w:
                                RetList.append(w)
                                break
                        p,r = divmod(y,x)
                        if r == 0:
                                w = p
        return RetList

def primes_dict(Limits = 1,KnownPrimes = [ 2 ]):
        RetList = KnownPrimes
        RetDict = {}
        for x in KnownPrimes:
                RetDict[x] = 1
                w = x + x
                n = 2
                while w <= Limits + 1:
                        RetDict[w] = n
                        w += x
                        n += 1
        p, r = 0,0
        for y in xrange(2, Limits + 1):
                for x, z in RetDict.iteritems():
                        if x*x > y:
                                RetDict[y] = 1
                                break
                        p,r = divmod(y,x)
                        if r == 0:
                                RetDict[y] = p
                                break
        return RetList

def sieve_list(Limits = 1, KnownPrimes = [ 2 ]):
        RetList = KnownPrimes
        CompList = [ ]
        for y in xrange(2, Limits + 1):
                if y not in CompList:
                        w = y
                        n = 1
                        while w <= Limits:
                                CompList.append(w)
                                w += y
                                n += 1
        return RetList

def sieve_list_2(Limits = 1, KnownPrimes = [ 2 ]):
        SieveList = [ 1 ]*(Limits )
        RetList = [ ]
        for y in xrange(2, Limits + 1):
                if SieveList[y-2] == 1:
                        RetList.append(y)
                        w = y + y
                        n = 2
                        while w <= Limits + 1:
                                SieveList[w - 2] = n
                                w += y
                                n += 1
        return RetList
                
def sieve_dict(Limits = 1, KnownPrimes = [ 2 ]):
        SieveDict = { }
        RetList = KnownPrimes
        for x in KnownPrimes:
                SieveDict[x] = 1
                w = x + x
                n = 2
                while w <= Limits + 1:
                        SieveDict[w] = n
                        n += 1
                        w += x
                
        for y in xrange(2, Limits + 1):
                if not SieveDict.has_key(y):
                        RetList.append(y)
                        w = y
                        n = 1
                        while w <= Limits + 1:
                                SieveDict[w] = n
                                w += y
                                n += 1
        return RetList
                
if __name__ == "__main__":
        import sys
        import profile
        import pstats
        
        import psyco
        
        #this function wraps up all the calls that we wish to benchmark.
        def multipass(number, args):
                for x in xrange(1, number + 1):
                        primes_list(args, [ 2 ])
                        print ".",
                        sys.stdout.flush()
                        primes_dict(args, [ 2 ])
                        print ".",
                        sys.stdout.flush()
                        #Do not uncomment this line unless you have a *very* long time to wait.
                        #sieve_list(args)
                        sieve_dict(args, [ 2 ])
                        print ".",
                        sys.stdout.flush()
                        sieve_list_2(args, [ 2 ])
                        print "\r           \r%i/%i"%(x, number),
                        sys.stdout.flush()
                print "\n"
        
        #number of times through the test
        passes = 5
        #find all primes up to maximum
        maximum = 1000000

        #create a profiling instance
        #adjust the argument based on your system.
        pr = profile.Profile( bias = 7.5e-06)
        
        #run the tests
        pr.run("multipass(%i, %i)"%(passes,maximum))
        #save them to a file.
        pr.dump_stats("primesprof")
                 
        #remove the profiling instance so that we can get a clean comparison.
        del pr
        
        #create a profiling instance
        #adjust the argument based on your system.
        pr = profile.Profile( bias = 7.5e-06)
        
        #"recompile" each of the functions under consideration.
        psyco.bind(primes_list)
        psyco.bind(primes_dict)
        psyco.bind(sieve_list)
        psyco.bind(sieve_list_2)
        psyco.bind(sieve_dict)
                
        #run the tests
        pr.run("multipass(%i, %i)"%(passes,maximum))
        #save them to a file
        pr.dump_stats("psycoprimesprof")
        
        #clean up our mess
        del pr
        
        #load and display each of the run-statistics.
        pstats.Stats('primesprof').strip_dirs().sort_stats('cum').print_stats()
        pstats.Stats('psycoprimesprof').strip_dirs().sort_stats('cum').print_stats()



From ykingma at accessforall.nl  Sat Jan 17 14:37:54 2004
From: ykingma at accessforall.nl (Ype Kingma)
Date: Sat, 17 Jan 2004 20:37:54 +0100
Subject: Suggested generator to add to threading module.
References: <7934d084.0401152058.164a240c@posting.google.com>
	<40083eac$0$321$e4fe514c@news.xs4all.nl>
	<mailman.446.1074283391.12720.python-list@python.org>
	<40086C6E.8536542C@hotmail.com>
Message-ID: <40098f12$0$320$e4fe514c@news.xs4all.nl>

Alan,

you wrote:
> [Andrae Muys]
>>>> Found myself needing serialised access to a shared generator from
>>>> multiple threads.  Came up with the following
>>>>
>>>> def serialise(gen):
>>>>   lock = threading.Lock()
>>>>   while 1:
>>>>     lock.acquire()
>>>>     try:
>>>>       next = gen.next()
>>>>     finally:
>>>>       lock.release()
>>>>     yield next
> 
> [Ype Kingma]
>>> Is there any reason why the lock is not shared among threads?
>>> From the looks of this, it doesn't synchronize anything
>>> between different threads. Am I missing something?
> 
> [Jeff Epler]
>> Yes, I think so.  You'd use the same "serialise" generator object in
>> multiple threads, like this:
>> 
>> p = seralise(producer_generator())
>> threads = [thread.start_new(worker_thread, (p,))
>>                 for t in range(num_workers)]
> 
> Hmm. I think Ype is right: the above code does not correctly serialise
> access to a generator.

Well, I just reread PEP 255, and I can assure you a was missing something...
 
> The above serialise function is a generator which wraps a generator.
> This presumably is in order to prevent the wrapped generators .next()
> method being called simultaneously from multiple threads (which is
> barred: PEP 255: "Restriction:  A generator cannot be resumed while it
> is actively running")
> 
> http://www.python.org/peps/pep-0255.html
> 
> However, the above implementation re-creates the problem by using an
> outer generator to wrap the inner one. The outer's .next() method will
> then potentially be called simultaneously by multiple threads. The

I agree (after rereading the PEP.)

> following code illustrates the problem
> 
> #-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
> import time
> import thread
> import threading
> 
> def serialise(gen):
>   lock = threading.Lock()
>   while 1:
>     lock.acquire()
>     try:
>       next = gen.next()
>     finally:
>       lock.release()
>     yield next
> 
> def squares(n):
>   i = 1
>   while i < n:
>     yield i*i
>     i = i+1
> 
> def worker_thread(iter, markers):
>   markers[thread.get_ident()] = 1
>   results = [] ; clashes = 0
>   while 1:
>     try:
>       results.append(iter.next())
>     except StopIteration:
>       break
>     except ValueError, ve:
>       if str(ve) == "generator already executing":
>         clashes = clashes + 1
>   del markers[thread.get_ident()]
>   print "Thread %5s: %d results: %d clashes." % (thread.get_ident(),\
>    len(results), clashes)
> 
> numthreads = 10 ; threadmarkers = {}
> serp = serialise(squares(100))
> threads = [thread.start_new_thread(worker_thread,\
>             (serp, threadmarkers)) for t in xrange(numthreads)]
> while len(threadmarkers.keys()) > 0:
>   time.sleep(0.1)
> #-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
> 
> I believe that the following definition of serialise will correct the
> problem (IFF I've understood the problem correctly :-)
> 
> #-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
> import time
> import thread
> import threading
> 
> class serialise:
>   "Wrap a generator in an iterator for thread-safe access"
> 
>   def __init__(self, gen):
>     self.lock = threading.Lock()
>     self.gen = gen
> 
>   def __iter__(self):
>     return self
> 
>   def next(self):
>     self.lock.acquire()
>     try:
>       return self.gen.next()
>     finally:
>       self.lock.release()

Looks like a candidate for inclusion in a standard library to me.
 
> def squares(n):
>   i = 1
>   while i < n:
>     yield i*i
>     i = i+1
> 
> def worker_thread(iter, markers):
>   markers[thread.get_ident()] = 1
>   results = [] ; clashes = 0
>   while 1:
>     try:
>       results.append(iter.next())
>     except StopIteration:
>       break
>     except ValueError, ve:
>       if str(ve) == "generator already executing":
>         clashes = clashes + 1
>   del markers[thread.get_ident()]
>   print "Thread %5s: %d results: %d clashes." % (thread.get_ident(),\
>    len(results), clashes)
> 
> numthreads = 10 ; threadmarkers = {}
> serp = serialise(squares(100))
> threads = [thread.start_new_thread(worker_thread,\
>             (serp, threadmarkers)) for t in xrange(numthreads)]
> while len(threadmarkers.keys()) > 0:
>   time.sleep(0.1)
> #-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
> 
> Also, I don't know if I'm happy with relying on the fact that the
> generator raises StopIteration for *every* .next() call after the
> actual generated sequence has ended. The above code depends on the
> exhausted generator raising StopIteration in every thread. This seems
> to me the kind of thing that might be python-implementation specific.
> For example, the original "Simple Generators" specification, PEP 255,
> makes no mention of expected behaviour of generators when multiple
> calls are made to the its .next() method after the iteration is
> exhausted. That I can see anyway? Am I wrong?

Quoting from PEP 234:
http://www.python.org/peps/pep-0234.html

"Once a particular iterator object has raised StopIteration, will
it also raise StopIteration on all subsequent next() calls?
...
Resolution: once StopIteration is raised, calling it.next()
continues to raise StopIteration."

Thanks to all for the help,

Ype



From joshway_without_spam at myway.com  Fri Jan  9 15:56:26 2004
From: joshway_without_spam at myway.com (JCM)
Date: Fri, 9 Jan 2004 20:56:26 +0000 (UTC)
Subject: Variable Scope 2 -- Thanks for 1.
References: <dcde6f.0401091247.c17b76e@posting.google.com>
Message-ID: <btn4hq$2om$1@fred.mathworks.com>

Jens Thiede <jensthiede at webgear.co.za> wrote:
> I found the querk in my code:

> a = [1, 2, 3];
> b = a;
> b.append(4);

> b == [1, 2, 3, 4]; # As it should.
> a == [1, 2, 3, 4]; # - Why?

> One would think that b is a referance to a - however I know it's not.

Rather, a and b hold references to the same object--the list created
by the expression [1, 2, 3].

> Without changing a thing from above, the following is true:

> b = [];
> b.append(5);
> a == [1, 2, 3, 4];
> b == [5];

> How do I avoid accedentaly modifying variables, is this a bug? If not
> why not?

Assignment rebinds variables to different objects, so b now holds a
reference to the list created by the expression [].


From martin at v.loewis.de  Sat Jan  3 19:33:09 2004
From: martin at v.loewis.de (Martin v. Loewis)
Date: Sun, 04 Jan 2004 01:33:09 +0100
Subject: Creating a capabilities-based restricted execution system
In-Reply-To: <xLmcnRQRiubcq2qiXTWc-g@speakeasy.net>
References: <LmmdnUn4seDeGWuiXTWc-w@speakeasy.net>
	<7xznd58klr.fsf@ruckus.brouhaha.com>
	<MGudndQhy9ieEmuiXTWc-w@speakeasy.net>
	<bt6bec$25j$06$1@news.t-online.com>
	<yJacnYxpY-E2kWqiXTWc-w@speakeasy.net>
	<m31xqgag0v.fsf@mira.informatik.hu-berlin.de>
	<xLmcnRQRiubcq2qiXTWc-g@speakeasy.net>
Message-ID: <bt7n06$a57$05$1@news.t-online.com>

Sean R. Lynch wrote:
> Well, I'm providing a same_type function that compares types. What else 
> do you want to do with type()? The other option is to go the Zope3 route 
> and provide proxies to the type objects returned by type().

I don't know what is needed, but I know that existing code will break
when it did not strictly need to - no existing code uses your function.

If you think your users can accept rewriting their code - fine.

Regards,
Martin



From dave at pythonapocrypha.com  Fri Jan  2 15:57:31 2004
From: dave at pythonapocrypha.com (Dave Brueck)
Date: Fri, 2 Jan 2004 13:57:31 -0700
Subject: Can this be reversed (Tkinter)?
References: <002d01c3d171$df2920b0$5501a8c0@markxp>
Message-ID: <06a901c3d173$0a7e27f0$6401fea9@YODA>

> I am looking at the format used by root.geometry().  The string returned
> from root.geometry() is "%dx%d+%d+%d".  Is there a quick and painless
> way to extract the values from that string (i.e., "100x150+25+25" =>
> (100,150,25,25))?

How about:

s = '100x150+25+25'
import re
reg = re.compile('(\d+)x(\d+)\+(\d+)\+(\d+)')
[int(x) for x in reg.match(s).groups()]

-Dave



From spamtrap at bigfoot.com  Mon Jan 12 06:56:00 2004
From: spamtrap at bigfoot.com (zde)
Date: Mon, 12 Jan 2004 12:56:00 +0100
Subject: wrapping C pointers
Message-ID: <40028B50.90007@bigfoot.com>

Hi,

What's the preferred way to wrap handles to C structures in python?
(opaque 32-bit pointers with LSBs=00, that python should never deref)

Convert directly to PyLong? (seems most natural, although python longs
are quite heavy-weight).

Shift right and convert to PyInt? (might result in a bit smaller & faster
python object, but does it really pay off?)

Convert to hexadecimal string? (looks horrible, but SWIG uses that
by default, and the author claims it's faster than embedding the pointer
inside CObjects. (?!?)

CObject? Would provide type information + simple-to-add C methods, but
I don't really need that right now, especially if it's slower than
hexadecimal strings..

Anyone ran some tests? What python types people use in their wrappers?
Thanks..

--
Zdenek



From maxm at mxm.dk  Sun Jan 18 07:23:11 2004
From: maxm at mxm.dk (Max M)
Date: Sun, 18 Jan 2004 13:23:11 +0100
Subject: Does anyone else not find the fun in programming...?
In-Reply-To: <slrnc0jc91.75d.ramen@lackingtalent.com>
References: <d232c5e.0401130823.27fd26ff@posting.google.com>
	<4004f5ac$0$69931$edfadb0f@dread12.news.tele.dk>
	<slrnc0jc91.75d.ramen@lackingtalent.com>
Message-ID: <400a7a92$0$205$edfadb0f@dread12.news.tele.dk>

Dave Benjamin wrote:

> In article <4004f5ac$0$69931$edfadb0f at dread12.news.tele.dk>, Max M wrote:

> What Python libraries do you use to do algorithmic composition? I played
> around with Snack (for Tcl) awhile back but couldn't get decent realtime
> performance so I gave up on the idea for the time being. I'm very interested
> to hear what sort of techniques you use.

First of I don't use realtime...

I create lists of notes::

class Note:

     def __init__(self, time=0, pitch=64, velocity=64, duration=96):
         self.time = time
         self.pitch = pitch
         self.velocity = velocity
         self.duration = duration

     def __str__(self):
         r = []
         a = r.append
         a('time %s' % self.time)
         a('pitch %s' % self.pitch)
         a('velocity %s' % self.velocity)
         a('duration %s' % self.duration)
         return '\n'.join(r)


That are then converted into midi files by a very simple wrapper layer.

This simple structure makes it extremely simple to create 
transformations on a list of notes. I considder each list a "part" like 
you see it in Cubase/Logic.

The idea is then to create a personal library of transformations and 
generators that expres your own musical style. I also have a few 
routines for repeating/extending/sequencing these parts.

I import these midi files into software like Cubase, or Reason or Orion. 
Where they drive either hardware or software synths.

I like to fiddle around with the sounds manually by twiddleling the knobs.

But I don't change the mnusic manually in the sequencer software. Rather 
i change the software and genereate a new midi file, that I reload.

It is a bit like writing code generators. And it is completely flexible, 
creative and fun due to the ease of Python.


regards Max M


From giles_brown at hotmail.com  Wed Jan 28 14:58:36 2004
From: giles_brown at hotmail.com (Giles Brown)
Date: 28 Jan 2004 11:58:36 -0800
Subject: Help with Extension Class Crash
References: <57de9986.0401280544.37d56ebb@posting.google.com>
Message-ID: <57de9986.0401281158.41fd421@posting.google.com>

giles_brown at hotmail.com (Giles Brown) wrote in message news:<57de9986.0401280544.37d56ebb at posting.google.com>...
> Hello folks,
<snip>
> Can anyone help?

Yes I can.
You used the wrong HEAD macro.  You need a different macro for a 
variable size object you idiot!

Sheesh.  

Giles


From kristian.ovaska at helsinki-nospam.fi.invalid  Fri Jan 16 12:20:03 2004
From: kristian.ovaska at helsinki-nospam.fi.invalid (Kristian Ovaska)
Date: Fri, 16 Jan 2004 17:20:03 GMT
Subject: do loop
References: <3064b51d.0401160536.5d80fa97@posting.google.com>
Message-ID: <0o5g009j960v8dk477637l3046b8lv1v9g@4ax.com>

beliavsky at aol.com:
>In a Python 'for' loop, one can change the value of looping variable,
[...]
>Is there a way to write a loop in Python that enforces this
>constraint? Should such functionality be added to the language?

In Python, "for i in range(3)" produces a sequence [0, 1, 2] and binds
each element to i in turn. It's the sequence that drives the loop; i
is more like a placeholder, and you are free to bind some other value
to it if you wish - it doesn't change loop semantics. So, it makes no
sense to restrict i.

-- 
Kristian Ovaska - http://www.cs.helsinki.fi/u/hkovaska/en/


From not at existing.ru  Fri Jan 23 10:59:42 2004
From: not at existing.ru (bva)
Date: Fri, 23 Jan 2004 16:59:42 +0100
Subject: viewcvs install error on solaris
In-Reply-To: <400821B5.F7B7AB1B@attglobal.net>
References: <4007e92d$0$325$ba620e4c@news.skynet.be>
	<400821B5.F7B7AB1B@attglobal.net>
Message-ID: <401144f8$0$766$ba620e4c@news.skynet.be>

I'm less than a newbie in Python.  Do you have to download these modules 
seperately or do they come with the default python install?

Jack J. Woehr wrote:
> bva wrote:
> 
> 
>>Hello,
>>
>>While trying to install viewcvs on a solaris 5.9 machine I get the
>>following error message:
>>
>>Traceback (most recent call last):
>>   File "./viewcvs-install", line 35, in ?
>>     import compat
>>   File "./lib/compat.py", line 20, in ?
>>     import urllib
>>   File "/usr/local/lib/python2.2/urllib.py", line 26, in ?
>>     import socket
>>   File "/usr/local/lib/python2.2/socket.py", line 41, in ?
>>     from _socket import *
>>ImportError: No module named _socket
>>
>>Python is installed on the machine.  Can anybody tell me what I'm doing
>>wrong or what I've forgotten?
>>
> 
> 
> Apparently, there's a module named "socket" that you don't have installed.
> 
> 
> --
> Jack J. Woehr                 # Ceterum censeo
> PO Box 51, Golden, CO 80402   # in herbas belli
> http://www.softwoehr.com      # ab idem desistamus.
> 
> 
> 



From dietrich at zdome.net  Sun Jan 25 04:35:28 2004
From: dietrich at zdome.net (Dietrich Epp)
Date: Sun, 25 Jan 2004 01:35:28 -0800
Subject: [OPINION] - does language really matter if they all
	do	the	samething?
In-Reply-To: <4012FEB1.5000106@prescod.net>
References: <69A0D4AB81C51447AD6BA387782B8D64093D8A@midl-mail4.etcconnect.com>	<028FD9F0-4E01-11D8-BB78-0003934ACDEC@zdome.net>	<4011C497.1040302@prescod.net>
	<58587302-4E30-11D8-8FAB-0003934ACDEC@zdome.net>
	<4012FEB1.5000106@prescod.net>
Message-ID: <CFB98808-4F19-11D8-A197-0003934ACDEC@zdome.net>


On Jan 24, 2004, at 3:24 PM, Paul Prescod wrote:

> function random_sword_magic_power(quality):
>     return choose_random_assoc(
> 	selector = (quality, (poor, medium, good)),
> 	properties = {	(5, 0, 0): glows_in_the_dark(),
> 	              	(3, 3, 0): magically_silent(),
> 			(1, 5, 1): elemental_power(
> 			  choice([earth, water, air, fire])
> 			(0, 2, 4): magical_keen_edge(),
> 			(0, 0, 2): ????}
>
> I don't follow what you are doing with the last line so I didn't 
> duplicate it.

The last line recursively calls random_sword_magic_power() twice and 
concatenates the results.  It's something that I used a lot in this 
program, which I originally wrote in Python, but I was completely 
baffled trying to implement this part.  The reason you can't do it with 
a dict or list in Python is that the list is always evaluated, and 
recurses infinitely.  A dict isn't appropriate because there would be 
duplicate keys.  Think of it as three tables collapsed into one, the 
'poor', 'medium', and 'good' tables, where the relative probabilities 
for each table fall on a different column.

So....

(choose-random-assoc color (red green) ((2 1) foo) ((1 1) bar))

...has a 2/3 chance of producing 'foo' when color=red, but only 1/2 
when color=green.

My original point was that Python is not completely agnostic.  There's 
a method to programming in Python, and some patterns just don't fit 
that method.  I anticipated people asking for examples, and I expected 
that a couple of my examples would fall flat.  While Python is a 
fantastic general-purpose language, it will often be beaten by 
application-specific languages, but only in their domain.  I 
purposefully didn't use any examples of application-specific languages 
because people would tell me that I were not being fair.

I still have no idea how to express the function in Python without 
adding "crutches".




From quentel.pierre at wanadoo.fr  Sat Jan 10 08:25:46 2004
From: quentel.pierre at wanadoo.fr (Pierre Quentel)
Date: Sat, 10 Jan 2004 14:25:46 +0100
Subject: Asynchronous HTTP server in standard library ?
Message-ID: <btougu$o9b$1@news-reader3.wanadoo.fr>

Python standard library provides two modules for asynchronous socket
programming : asyncore and asynchat. Several web servers have been built
upon these modules (medusa being the best-known I suppose) and are famous
for their performance level

Unfortunately no example of use is provided in the standard library (whereas
the more "classic" SocketServer is illustrated by BaseHTTPServer,
SimpleHTTPServer, etc). I think it would be useful if Python came with a
simple HTTP server written with these modules, to help beginners understand
how use them

I've written one, which handles GET and POST requests. It's inspired by (and
partly copied from) the http subset of medusa, only reduced to less than 200
lines. It's called SimpleAsyncHTTPServer and published on Active State
Python Cookbook
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/259148

Any thoughts ?
Pierre




From aahz at pythoncraft.com  Sun Jan 18 19:04:39 2004
From: aahz at pythoncraft.com (Aahz)
Date: 18 Jan 2004 19:04:39 -0500
Subject: threads and loops
References: <mailman.485.1074468980.12720.python-list@python.org>
Message-ID: <buf6un$s14$1@panix1.panix.com>

In article <mailman.485.1074468980.12720.python-list at python.org>,
python-list <python-list at frenchfriedhell.com> wrote:
>
>I'm starting to work with threads, but I'm a little confused.  I think
>I understand the concepts, but not the controls. Why doesn't something
>like this work:

Rather than answering your question directly, I'll tell you to look at
my slides at http://www.pythoncraft.com/OSCON2001/
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

A: No.
Q: Is top-posting okay?


From engsolnorm at ipns.com  Sun Jan 25 14:38:50 2004
From: engsolnorm at ipns.com (engsol)
Date: Sun, 25 Jan 2004 11:38:50 -0800
Subject: Python and writing a CSV file
References: <mailman.611.1074719029.12720.python-list@python.org>
	<kNDPb.6494$6o4.181@fe2.texas.rr.com>
	<20040121232549.GA28328@mail.theserver.ath.cx>
	<009501c3e07e$80b62e30$97443d42@homebass1>
	<16399.7079.192926.761791@montanaro.dyndns.org>
	<000c01c3e2b7$a6eabcc0$97443d42@homebass1>
	<mailman.767.1075053933.12720.python-list@python.org>
Message-ID: <cg68105aq9ormbfkt7g4im31dcb16jlno6@4ax.com>

On Sun, 25 Jan 2004 12:05:23 -0600, Skip Montanaro <skip at pobox.com>
wrote:

>
>    Kevin> Thanks for responding. Currently we do not have Python 2.3
>    Kevin> installed on our server, is there another way to perform this
>    Kevin> task with another module or without a module? Thanks!
>
>The Object Craft module does write CSV files.  When we wrote the module
>included with 2.3, we conciously tried to keep it compatible with 2.2, so
>you might well be able to just download it and compile it with 2.2 like any
>other third-party module.  If that fails, let me know and I'll see if I
>can't steer you in the right direction.
>
>Failing all that, if your data is very well-behaved, you can write valid CSV
>data quite easily.  Given a list of lists like so:
>
>    data = [
>        [1, 2, 4, "My data"],
>        ["abc", "def", "ghi"],
>        ["234234234", 1.2e7, "!@##%^*"],
>    ]
>
>you should be able to write it to sys.stdout with something like (untested):
>
>    for row in data:
>        row = [str(e) for e in row]
>        print '"' + '","'.join(row) + '"'
>
>Note that the data above doesn't include quotation marks in any of the
>fields, the separator is always a comma, and all output will be fully
>quoted.  Also, it assumes you're on Windows where you'll automatically get
>CRLF terminators.
>
>You should be able to fairly easily extend the above code to handle those
>situations.
>
>Skip
>
Great timing!

I was about to post a question regarding CSV files.

I bread-boarded a small test script to learn how the csv thing works,
and it seems to work well.

The script is:

import csv

writer = csv.writer(file('csv_test.CSV', 'w'))

list_1 = ['a','b','c']
list_2 = ['d','e','f']
list_3 = list_1 + list_2

for ix in range(3):
    print list_3
    writer.writerow(list_3)

stdout reports:

['a', 'b', 'c', 'd', 'e', 'f']
['a', 'b', 'c', 'd', 'e', 'f']
['a', 'b', 'c', 'd', 'e', 'f']

but the csv file shows:

a,b,c,d,e,f

a,b,c,d,e,f

a,b,c,d,e,f

So the question is, where does the extra crlf in the csv file come
from? And how do I get rid of it?

Thanks,
Norm


From peter at engcorp.com  Mon Jan 12 16:32:22 2004
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 12 Jan 2004 16:32:22 -0500
Subject: How to call a system command with flexibility on Windows
References: <4aEMb.1798$PK6.17978@nnrp1.uunet.ca>
Message-ID: <40031266.B76A5B6F@engcorp.com>

Nicolas Fleury wrote:
> 
>         I have a hard time trying to call a system command with the following
> capability on Windows:
> - Redirection of stdout and stderr.
> - Have the return code.
> 
> The documentation seems to say it's only possible on Unix, have I missed
> something.  Thx for your help.

It can be done on Windows, although at the very least you cannot redirect
stderr properly from the command line on Win98....  not sure about other
issues.

I'm pretty sure return codes are available with os.system() under Windows,
but I rarely use them and forget any relevant details.

-Peter


From graham__fawcett at hotmail.com  Fri Jan 30 14:46:55 2004
From: graham__fawcett at hotmail.com (Graham Fawcett)
Date: 30 Jan 2004 11:46:55 -0800
Subject: Building a Course Management System
Message-ID: <e9570f37.0401301146.714d1551@posting.google.com>

My employer (University of Windsor, Canada) has given me the go-ahead
to prototype a CMS (Course Management System, not Content
Management), written in Python, to be released under an open-source
license (choice of license is TBA).

Course Management is a rather broad domain, covering content
management, communications tools (e.g., announcements, mail, chat,
discussion), assessment (quizzes, surveys, assignments, gradebook),
activity tracking, etc. Ideally a good CMS will be portal-based, to
aid in managing information- and work-flow.

Open-source is finally making headways into the course-management
domain, one that has been predominantly commercial for some time.
There are a few open-source CMS initiatives out there: Moodle and
LogiCampus (both of which are written in PHP) come to mind. We've
played with the PHP projects, and though they have some fine features,
they also have some drawbacks (PHP as a language choice being among
them, but also a number of less-than-ideal design choices, IMO).

Needless to say, I'm very excited at the prospect of designing and
building such a prototype, and even more excited about the opportunity
to open-source it. But for my employer's sake, I must be diligent and
survey existing projects, and community interest in such a project.

-- Are there other Python-based CMS (Course management systems) that
I've overlooked? (Zope4Edu came to mind, but it's commerical, I think;
at least, there's no public CVS that I can find.)

-- Is there anyone out there who would like to collaborate on a new
Python-based CMS? (We do have some specific requirements, and so I
might be somewhat inflexible about early design decisions, but there
is plenty of room at the party for other designers, programmers,
artists and writers.) We're especially interested in partnerships with
other academic institutions, though that's not a constraint.

Although a formal timeline hasn't been set, I expect that the
prototype will be about an eight-week project, starting some time
within the next month. At the end of the project, we must produce a
useable system with enough functionality to allow for experimentation
and beta-testing. In the release-early-release-often spirit, I would
hope to publish an early-alpha version within the first week or two of
development. Some features will be specific to our needs, but I hope to
keep it largely generic.

(For those wondering why Python was specified, when little else has
been formalized yet: simply put, I get to choose the tools for the
prototype, and I choose Python. If I had twice as much time, I'd write
it in Java.)

I'd encourage any interested people to contact me by e-mail at 
<fawcett AT uwindsor DOT ca>. (I respect if no one gets excited over 
a vapourware announcement, but I'd love to have a list of people
to contact when the alpha is out.)

Regards,

-- Graham <fawcett AT uwindsor DOT ca>


From syver at inout.no  Fri Jan 16 11:42:59 2004
From: syver at inout.no (Syver Enstad)
Date: 16 Jan 2004 17:42:59 +0100
Subject: Very strange unicode behaviour
References: <uisjbrhre.fsf@inout.no> <y8s7c0ml.fsf@python.net>
Message-ID: <uad4nrgj0.fsf@inout.no>

Thomas Heller <theller at python.net> writes:

> > Is this behaviour the same on Python 2.3?
> 
> No, it behaves correctly as it seems:

That's a relief. See my later post to see why the first report I gave
was *very* confusing.




From swalters_usenet at yahoo.com  Thu Jan 15 01:18:51 2004
From: swalters_usenet at yahoo.com (Samuel Walters)
Date: Thu, 15 Jan 2004 06:18:51 GMT
Subject: best application framework for developing web application
References: <14ba0c0.0401142201.68faebcf@posting.google.com>
Message-ID: <pan.2004.01.15.06.17.20.784856@yahoo.com>

| aj said |

> hi
> i am a newbi to python and developing a web application what do u all
> think is the best application framework for developing web application in
> python. I want a framework that supports templates,database connectivity,
> is available for both unix and windows ,and ofcourse is easy to learn.
> Zope
> Quixote
> Draco or others

Participate in the ongoing discussion of that topic:
http://groups.google.com/groups?hl=en&lr=&ie=UTF-8&safe=off&th=c8dbc563a0c82b6f&rnum=1

HTH

Sam Walters.

-- 
Never forget the halloween documents.
http://www.opensource.org/halloween/
""" Where will Microsoft try to drag you today?
    Do you really want to go there?"""



From jjl at pobox.com  Wed Jan 14 21:01:46 2004
From: jjl at pobox.com (John J. Lee)
Date: 15 Jan 2004 02:01:46 +0000
Subject: I come not to bury C++, but to praise it...
References: <mailman.337.1074032524.12720.python-list@python.org>
	<bu1uul$cam92$1@ID-46268.news.uni-berlin.de>
	<cu%Mb.47396$8H.99443@attbi_s03>
	<bu3khe$dbm5v$1@ID-46268.news.uni-berlin.de>
	<mailman.356.1074094662.12720.python-list@python.org>
	<bu408b$d67fm$1@ID-46268.news.uni-berlin.de>
Message-ID: <87ad4qrmut.fsf@pobox.com>

"Derek" <none at none.com> writes:
[...]
> Maybe I didn't make myself clear.  I counted the ease with which
> memory can be corrupted in C++ as a minus for C++ and a plus for
> Python.  I agree with you.

No, you don't (assuming I understand Jp's post), because...


> On the flip side, C++ can catch errors immediately that Python will
> not complain about until runtime, and in this imperfect world tests
> may not catch all such errors up front.  In this respect I consider
> C++ safer.

...you made no evaluation of the relative importance of these two
qualities (memory-safety and static type-safety).  Nor of the fact
that C++ comes unavoidably packaged with the more-lines-of-code-per-
function-point anti-feature -- KIS!


John


From http  Tue Jan 13 14:08:58 2004
From: http (Paul Rubin)
Date: 13 Jan 2004 11:08:58 -0800
Subject: Division oddity
References: <ssn3009029rrug3l8dk1pn06tqd019ucld@4ax.com>
	<7xeku5vrn8.fsf@ruckus.brouhaha.com>
	<cdm7005r12o3o3f6gngj8no1qh74ul3733@4ax.com>
	<400413E0.5C691A56@engcorp.com>
Message-ID: <7xr7y3mzsl.fsf@ruckus.brouhaha.com>

Peter Hansen <peter at engcorp.com> writes:
> > Well, the documentation for "input()" says "Equivalent to
> > eval(raw_input(/prompt/))". Perhaps it should say "/Usually/
> > equivalent...."
> 
> I remember reading that too, and just assumed that at this point
> it was in fact *implemented* that way, as a simple alias.  Maybe
> it should be...

Python has no support for macros or aliases, and it would be silly
to add some special kludge for input().  The user needs to be able
to redefine the function and so forth too.


From bart_nessux at hotmail.com  Mon Jan 12 11:59:53 2004
From: bart_nessux at hotmail.com (Bart Nessux)
Date: Mon, 12 Jan 2004 11:59:53 -0500
Subject: Why learn Python ??
In-Reply-To: <du765fh2l5a.fsf@amadeus.cc.tut.fi>
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<du765fh2l5a.fsf@amadeus.cc.tut.fi>
Message-ID: <btujq9$3q$1@solaris.cc.vt.edu>

Ville Vainio wrote:

> Learn Python first, the ease of programming can quite possibly inspire
> you to create something interesting.

This is true. Learn Python and *then* learn other languages. Learn as 
many languages as you like. Python will teach you how to think when 
writing programs. This thought process will be the same for C, C++, 
Perl, etc. As a bonus, Python can be applied to solving real-world 
problems as well. So, you get the best of both worlds:

1. A theorhetical language that easily teaches the concepts of modern 
computer programming.

2. A practical language that is actually useful for doing things.

Python is also easy to read compared to other languages. It's much 
easier to learn. Its syntax doesn't get in the way of learning like C 
++, or other language's syntax can. It's fun too.

Best of luck,

Bart



From none at none.com  Wed Jan 14 13:02:50 2004
From: none at none.com (Derek)
Date: Wed, 14 Jan 2004 13:02:50 -0500
Subject: I come not to bury C++, but to praise it...
References: <mailman.337.1074032524.12720.python-list@python.org><bu1uul$cam92$1@ID-46268.news.uni-berlin.de><cu%Mb.47396$8H.99443@attbi_s03><bu3khe$dbm5v$1@ID-46268.news.uni-berlin.de>
	<mailman.356.1074094662.12720.python-list@python.org>
Message-ID: <bu408b$d67fm$1@ID-46268.news.uni-berlin.de>

"Jp Calderone" wrote:
> > I also use C++ and Python as my main languages and I
> > agree with your comments.  However, I don't agree that
> > Python is inherently "safer" than C++.  At best I see
> > it as a tie.  For example, C++ let's you corrupt memory
> > among other "unsafe" things, most of which can be avoided
> > by using standard containers, smart pointers, etc.
> > Python lets you do "unsafe" things such as passing an
> > object to a function when it makes no sense to do so,
> > which can lead to nasty runtime surprises.
>
>   A traceback is *much* less nasty than memory corruption.
> One stops the program immediately and shows you exactly
> where the problem lies, the other may let the program run
> for quite a long time before simply causing the process to
> die, leaving few clues as to the source of the problem.
>
>   Python may not be *completely* safe (indeed, memory
> corruption is still possible due to bugs in the interpreter
> and extension modules), but it is quite a bit safer than
> C++.

Maybe I didn't make myself clear.  I counted the ease with which
memory can be corrupted in C++ as a minus for C++ and a plus for
Python.  I agree with you.

On the flip side, C++ can catch errors immediately that Python will
not complain about until runtime, and in this imperfect world tests
may not catch all such errors up front.  In this respect I consider
C++ safer.




From jzgoda at gazeta.usun.pl  Sat Jan 17 09:30:36 2004
From: jzgoda at gazeta.usun.pl (Jarek Zgoda)
Date: Sat, 17 Jan 2004 14:30:36 +0000 (UTC)
Subject: [OT] AS/400
References: <mailman.352.1074092092.12720.python-list@python.org>
	<bu4a5n$k9$6@atlantis.news.tpi.pl> <4005cd03@news.mt.net.mk>
	<dbc00a99.0401170622.5f1902d0@posting.google.com>
Message-ID: <bubgub$au3$2@atlantis.news.tpi.pl>

Frank Bechmann <fBechmann at web.de> pisze:

> btw.: there is even a python port for the AS/400, but even if CL as
> ugly as a nightmare it can't be beaten in terms of productivity on an
> AS/400.

Yes, htpp://www.iseriespython.com/. Discovery of existence of Python for
iSeries made me switch back to AS/400 from Unix.

-- 
Jarek Zgoda
Unregistered Linux User #-1
http://www.zgoda.biz/ JID:zgoda-a-chrome.pl http://zgoda.jogger.pl/


From jepler at unpythonic.net  Wed Jan 21 10:59:59 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Wed, 21 Jan 2004 09:59:59 -0600
Subject: newbie: prefix operator "**"
In-Reply-To: <wZwPb.14289$U77.998313@news20.bellglobal.com>
References: <wZwPb.14289$U77.998313@news20.bellglobal.com>
Message-ID: <20040121155959.GB18498@unpythonic.net>

On Wed, Jan 21, 2004 at 10:33:49AM -0500, Christian Jauvin wrote:
> Hello,
> 
> I am playing with some classes in the Tkinter module
> to learn some GUI basics.

Take a look at the Tutorial, section 4.7.2.  The ** prefix for an
argument means that it accepts arbitrary keyword arguments.
http://python.org/doc/tut/node6.html#SECTION006720000000000000000

Example:

def f(**kw):
    print kw

>>> f(a=1, b=2)
{'a': 1, 'b': 2}

Tkinter uses this to pass the keyword arguments along to the next level,
eventually to the Tk command to create or configure a widget.

Jeff



From irmen at -NOSPAM-REMOVETHIS-xs4all.nl  Mon Jan 26 19:35:40 2004
From: irmen at -NOSPAM-REMOVETHIS-xs4all.nl (Irmen de Jong)
Date: Tue, 27 Jan 2004 01:35:40 +0100
Subject: ANN: Snakelets 1.22 (simple-to-use web app server with dynamic
	pages)
Message-ID: <4015b25b$0$323$e4fe514c@news.xs4all.nl>

I'm happy to say that Snakelets 1.22 is available.

Snakelets is a Python web application server, mainly for educational
purposes (but it works fine, mind you). This project provides a threaded web
server, Ypages (HTML+Python language, similar to Java's JSPs) and Snakelets:
code-centric page request handlers (similar to Java's Servlets).
It is possible to run Snakelets off a CD (read-only mode).

Snakelet's focus is on understanding the way dynamic web sites are created
and make this process as easy as possible, while still providing a rich
and powerful server environment.

It's released under the open-source MIT Software license.
You can download from http://snakelets.sourceforge.net
(go to the SF project site, and then the file section).

Most relevant changes since 1.21:

- all Ypages can be precompiled at startup to check for errors
- compiled Ypages can be written to a file, to aid debugging
- small Ypage parser fixes
- fixed some threading issues
- fixed small virtualhost issue, improved config checks

To start, edit the vhost config file (see docs) and
then run serv.py script, or the monitor.py script
if you want to start it as a daemon (on Unix).

Enjoy,
--Irmen de Jong.


From llothar at web.de  Thu Jan 29 21:05:59 2004
From: llothar at web.de (Lothar Scholz)
Date: 29 Jan 2004 18:05:59 -0800
Subject: Webhosting with Python
References: <8089854e.0401290012.465ba364@posting.google.com>
	<2004012913401516807%kevin@sborg>
Message-ID: <6ee58e07.0401291805.6878bf2a@posting.google.com>

Kevin Ballard <kevin at sb.org> wrote in message news:<2004012913401516807%kevin at sborg>...

> So, then, how do *they* plan to make money off of that?

I think it's possible. The speed of the free site is very slow (i
looked at the give link). If you calculate that 1/2 of the given
transfer rate is really used and you get a server from rackshack.net
(700GB for 99$) you can make 600$ per server. That's quite reasonable
if it is run by a student or someone who only want to get a few bucks
and has more time then money.

Oh yes, the banner and site layout is  59$ template from
"www.templatemonster.com" so i think it's a small one person company.


From rainerd at eldwood.com  Tue Jan 13 18:49:28 2004
From: rainerd at eldwood.com (Rainer Deyke)
Date: Tue, 13 Jan 2004 23:49:28 GMT
Subject: I come not to bury C++, but to praise it...
References: <mailman.337.1074032524.12720.python-list@python.org>
	<bu1uul$cam92$1@ID-46268.news.uni-berlin.de>
Message-ID: <cu%Mb.47396$8H.99443@attbi_s03>

Derek wrote:
> You also seem to have a narrow view of C++ as a strictly OO language
> when in fact it supports several programming paradigms (write whatever
> you want: template metaprograms, modules, procedures, classes, etc.).

C++ is rather similar to Python in this respect.  ;-)

I currently have two languages that I regularily use: C++ and Python.  C++
produces faster programs, gives direct access to the hardware, and has many
third-party libraries that Python doesn't have.  Python is more concise,
more flexible, safer, and has its own set of libraries that C++ doesn't
have.  Both have their place.  None of the other languages I've looked at
(with the possible exception of Common Lisp) seem to offer me anything that
I can't find in either Python or C++, and many of them (Java in particular)
are far too restrictive for my taste.


-- 
Rainer Deyke - rainerd at eldwood.com - http://eldwood.com




From peter at engcorp.com  Tue Jan 13 14:28:21 2004
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 13 Jan 2004 14:28:21 -0500
Subject: C++ bad-mouthing (was: Why learn Python ??)
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<7xisjh1e3i.fsf@ruckus.brouhaha.com>
	<10064loqc7sd7e3@corp.supernews.com>
	<7xeku496wx.fsf@ruckus.brouhaha.com>
	<donn-9D2291.16343412012004@nntp6.u.washington.edu>
	<40041576.D070723E@engcorp.com>
	<donn-8DC721.09485713012004@nntp6.u.washington.edu>
Message-ID: <400446D5.1265452A@engcorp.com>

Donn Cave wrote:
> 
> In article <40041576.D070723E at engcorp.com>,
>  Peter Hansen <peter at engcorp.com> wrote:
> > Basically, as a software engineer ... I find Python to be hands down
> > *the* best language I've encountered for use in serious work.  I can't
> > actually think of another which excels on so many fronts.
> 
> But your list describes the perfect hacker language, at
> least on some counts.  I'm nominally a Software Engineer
> myself, but I have no formal CS education and have never
> worked on a large project, so I feel right at home with
> the hacker culture here.  But help me out here, suppose
> we're going to go in and develop one of those massive
> projects - I don't know, say the IRS needs a new computer
> system - what on that list would we care about?

Never having done a new system for the IRS (yet? ;-) I can't
really say, but I do some pretty hard core stuff and Python
fits the bill for me better than past attempts...

> Maybe vague promises like high productivity and ease of
> testing would be attractive, but anyone can say that for
> some ideal context.  

Perhaps, but it's also pretty easy to quantify, at least in the
non-scientific fashion which I've attempted to use for that.

> Library support is probably not even on the charts.  

Very few systems cannot benefit from good library support.
Presumably the IRS requires networking, some user interface
capabilities, probably a bunch of database interfaces, really
sophisticated testing, and these days maybe even some standardization
in the area of, say, XML or something like that.

> I would think a major consideration at
> the outset of a project like this would be whether the
> code that all these teams is writing will eventually come
> together and work like it's supposed to, and from that
> point of view it's tempting to look for some support for
> architectural consistency, like "interfaces" and that sort
> of thing.

I agree, though I personally find it much more effective to use
good tests for this kind of thing.  Interfaces don't cut it when
there's not a simple caller-callee relationship between things.  I
have lots of components which are separated by various other kinds of
interfaces, such as a particular file format, or XML, or some custom
network protocol.  Need tests to check both sides of those equations.

-Peter


From roy at panix.com  Thu Jan  8 09:24:58 2004
From: roy at panix.com (Roy Smith)
Date: Thu, 08 Jan 2004 09:24:58 -0500
Subject: Looking for help with regular expressions- not Python Specific
References: <8d3e714e.0401072114.5bf3fba7@posting.google.com>
Message-ID: <roy-796F67.09245808012004@reader2.panix.com>

cappy2112 at yahoo.com (Tony C) wrote:
> But I would like to find a mailing list or newsgroup where I can ask
> questions about regexps (when things don't work), not specifically
> dealing with Python. When I have Python-regexp questions, I'll post
> them here of course.

I don't know of any regex-specific newsgroups or mailing lists, but most 
old unix hands are pretty good at them, so asking in comp.unix.questions 
might be worth trying.  Perl makes extensive use of regex, so I'll bet 
you'll find some regex gurus on comp.lang.perl too.

Try doing a search on groups.google.com for regex and see what 
newsgroups pop up the most with recent dates, then ask your questions 
there.  Keep in mind that there are many different regex libraries out 
there, and they don't all accept exactly the same syntax.  Python and 
Perl use the same library (I believe).

But, on the other hand, we're a pretty friendly group on 
comp.lang.python, and I know there's a bunch of regex wizards who hang 
out here as well, so why not just ask here.

One Python-specific tip is to get into the habit of ALWAYS using the r'' 
style raw strings for regex.  It makes life so much simplier.

Joe Francia <usenet at -OBFUSCATED-joefrancia.com> wrote:
> First, be sure you actually need regexes.  See if you can achieve the 
> same results using string methods.  String methods are faster to run, 
> easier to write, and much easier to debug.

Regex's are an extremely powerful tool, and anybody who's serious about 
programming (especially if you do text processing) should have a solid 
mastery of them.  That being said, Joe is certainly right about them not 
always being the best tool for the job.  Chainsaws and scalpels are both 
useful cutting tools, but hardly interchangable in all applications.  
Regex's can lead to extremely fast and compact code, but then can also 
lead to stuff which is impossible for anybody to understand 6 months 
later.

Also, Joe's comment that string methods are faster to run is a 
half-truth.  Regex's get compiled.  If you use the all-in-one step regex 
methods, you compile the expression every time you use it.  Compiling is 
expensive.  But, if you pre-compile the expression, using it is very 
fast.  Doing the compile step once, and re-using the result can be very 
fast.  A single regex that looks for a complex pattern may well be 
faster than a series of string methods tied together with conditional 
logic.  Your mileage may vary, so if speed is important to you, try 
different ways and profile it.

In any case, for the vast majority of stuff, speed is just not an issue, 
and you should pick your weapon based more on clarity and simplicity of 
the resulting code than on raw speed.


From newsgroups at jhrothjr.com  Tue Jan 20 19:04:31 2004
From: newsgroups at jhrothjr.com (John Roth)
Date: Tue, 20 Jan 2004 19:04:31 -0500
Subject: always the same object
References: <bukbuo$rqp$1@news.rz.uni-karlsruhe.de>
Message-ID: <100rgj1etbcqr9d@news.supernews.com>


"Uwe Mayer" <merkosh at hadiko.de> wrote in message
news:bukbuo$rqp$1 at news.rz.uni-karlsruhe.de...
> Hi,
>
> I am using struct.unpack() quite often. unpack() returns a tuple, however
a
> tuple with always the same id(), which is AFAIK the memory location of the
> structure.
>
> I found myself working with above tuple, initialising other data
structures,
> etc... and when I tried to change one list element, suddenly all list
> elements change => so they all contain the identical object

The biggest problem people have with lists is attempting to
reuse one rather than starting with a new one.

For example, this ***WILL NOT*** work:

class Fubar:
    aList = [None, None, None]

    def addToList(self, something):
        aList[:3] = something

on the other hand, this will work:

class Good:
    def __init__(self):
        self.aList = [None, None, None]

    def addToList(self, something):
        aList[:3] = something


> Now what are the rules when Python re-uses an old object (as with
> struct.unpack() ) and when does it create new objects?

As far as lists are concerned, list literals ([...]) always return a
new list.

> And what ist the proposed solution for dealing with this situation, i.e.
how
> do I create a true copy of what struct.unpack() returns me?

See above.

John Roth
>
> Thanks in advance
> Ciao
> Uwe




From teengo at yahoo.com  Tue Jan 13 16:07:19 2004
From: teengo at yahoo.com (Ticachua)
Date: 13 Jan 2004 13:07:19 -0800
Subject: How to intercept a keypress using python?
References: <mailman.318.1073996351.12720.python-list@python.org>
Message-ID: <ae453155.0401131307.42019336@posting.google.com>

Tim Golden <tim.golden at viacom-outdoor.co.uk> wrote in message news:<mailman.318.1073996351.12720.python-list at python.org>...
> >-----Original Message-----
> >From: teengo at yahoo.com [mailto:teengo at yahoo.com]
> >Sent: 12 January 2004 17:51
> >To: python-list at python.org
> >Subject: How to intercept a keypress using python?
> >
> >
> >Hello all,
> >
> >Does anyone know how to intercept user's keypress or 
> >mouseclick in Python?
> >I'd like to write a small tool (Python-based preferrably) running on
> >Windows to capture the user's keypresses and mouseclicks and write 
> >them to a file.
> >
> >Thanks for your help.
> >-- 
> 
> Check out:
> http://mail.python.org/pipermail/python-list/2003-November/195739.html
> 
> TJG
> 
> 
> ________________________________________________________________________
> This e-mail has been scanned for all viruses by Star Internet. The
> service is powered by MessageLabs. For more information on a proactive
> anti-virus service working around the clock, around the globe, visit:
> http://www.star.net.uk
> ________________________________________________________________________

Thanks a bunch Tim.


From miki.tebeka at zoran.com  Mon Jan 12 03:37:42 2004
From: miki.tebeka at zoran.com (Miki Tebeka)
Date: 12 Jan 2004 00:37:42 -0800
Subject: script to translate from compiler AST
References: <m3d69qk10i.fsf@netmaster.kds.com.ua>
Message-ID: <4f0a9fdb.0401120037.13686194@posting.google.com>

Hello Andrey,

> I'm looking for a script to translate from 'compiler' AST to py source
> and executable code.
> 
> Google search reveals hardly useful links.
> 
> Is there something like that or it is left as an exercise for a curious
> developer?

Have you looked at the parser module?
(http://www.python.org/doc/current/lib/module-parser.html) it does
have some functions operating on AST. The is also a visitor patter
support in the compiler module.

HTH.
Miki


From jepler at unpythonic.net  Sun Jan 18 13:07:39 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Sun, 18 Jan 2004 12:07:39 -0600
Subject: re question - finiding matching ()
In-Reply-To: <4f0a9fdb.0401180751.4b66d974@posting.google.com>
References: <4f0a9fdb.0401180751.4b66d974@posting.google.com>
Message-ID: <20040118180739.GA24401@unpythonic.net>

Regular Expressions cannot perform the simple task of matching an
arbitrary number of parentheses.  You could write an expression that
will work as long as the nesting isn't more than N levels, but the
expression quickly becomes very painful.

Instead, you can use some method to split the string into parts: one
part for "(", one for ")" and one for any other sequence of characters:

tokenize_re = re.compile("\(|\)|[^()]*")

Now, use this expression to tokenize your input string:

>>> tokens = tokenize_re.findall("add((2 * 2), 100)")
>>> print tokens
['add', '(', '(', '2 * 2', ')', ', 100', ')']
To match your language, the first token must be 'add':
	if tokens[0] != 'add': # no match
The second token must be '(':
	if tokens[1] != '(': # no match
Now, start scanning and counting parens, until you get back to 0
	nesting_level = 0
	for t in tokens[1:]:
		if t == ')':
			nesting_level -= 1
			if nesting_level == 0:
				# End of desired string
		else if t == '(':
			nesting_level += 1
	# if you end the loop without reaching nesting_level 0
	# then there were not enough close-parens
	# no match
You could also implement this part recursively (as you likely would if
you were actually compiling the string into bytecode).

Jeff



From rodrigob at elo.utfsm.cl  Wed Jan 21 15:55:49 2004
From: rodrigob at elo.utfsm.cl (Rodrigo Benenson)
Date: Wed, 21 Jan 2004 17:55:49 -0300
Subject: python said : "1, 2, 3, 6, 7, manbo !"
References: <pan.2004.01.21.20.53.18.750567@address.com>
Message-ID: <400ee387$1_1@nova.entelchile.net>

(corrected the identation)

> At the python2.3.2 prompt
>
> >>> a = range(8)
> >>> for b in a:
> ...........if b == 4:
> ................a.remove(b)
> ...........else:
> ................print b
>
>
> 0
> 1
> 2
> 3
> 6
> 7
>
>
> Why 5 does not appear ? (this was the source of a deep bug in a 4000+
> lines networked program...)
>
> RodrigoB
>




From jdhunter at ace.bsd.uchicago.edu  Wed Jan 14 23:19:14 2004
From: jdhunter at ace.bsd.uchicago.edu (John Hunter)
Date: Wed, 14 Jan 2004 22:19:14 -0600
Subject: Numeric Python and C
In-Reply-To: <bu44l3$jvv$1@chessie.cirr.com> (Ognen Duzlevski's message of
	"Wed, 14 Jan 2004 19:17:55 +0000 (UTC)")
References: <bu44l3$jvv$1@chessie.cirr.com>
Message-ID: <m265fd973x.fsf@mother.paradise.lost>

>>>>> "Ognen" == Ognen Duzlevski <maketo at norge.freeshell.org> writes:

    Ognen> Hi, can someone explain how to change a value within an
    Ognen> array from a C function?

Warning: I am not a Numeric C API guru.

For 1D arrays I use the following macro

// get x[i] from a 1d array of type xtype
#define get1d(x,i,xtype) \
*(xtype *)(x->data+i*x->strides[0])


You can assign to the return value of this, as in

  count = 0;
  while ((row = mysql_fetch_row(res)) != NULL) {
    get1d(p,count,float) = atof(row[0]);
    get1d(v,count,int) = atoi(row[1]);
    ++count;
  }

where p and v are 1D numeric arrays.

You'll have to do a bit more work for 2D arrays, but this may speed
you on your way....

JDH



From __peter__ at web.de  Wed Jan 21 22:44:51 2004
From: __peter__ at web.de (Peter Otten)
Date: Thu, 22 Jan 2004 04:44:51 +0100
Subject: Identifing current function
References: <pan.2004.01.22.02.21.53.368742@doe.com>
Message-ID: <bungps$7mm$05$1@news.t-online.com>

Brian Donovan wrote:

>   Is there a way to identify the current function. For example:

>>> import inspect
>>> def whoami(): return inspect.stack()[1][3]
...
>>> class A:
...     def someMethod(self): print whoami()
...     def anotherMethod(self): print whoami()
...
>>> def someFunc():
...     print whoami()
...     a = A()
...     a.someMethod()
...     a.anotherMethod()
...
>>> someFunc()
someFunc
someMethod
anotherMethod
>>>

Seems to work. No warranty, though.

Peter



From none at none.com  Sat Jan 10 04:22:18 2004
From: none at none.com (Eli Pollak)
Date: Sat, 10 Jan 2004 20:22:18 +1100
Subject: need help translating a PHP for statement to python
References: <a015bde3.0401100050.3e6b58c9@posting.google.com>
Message-ID: <BAY9-DAV50p68V8zDv600019a98@hotmail.com>

Haha ... you must be originally a perl coder. Who else writes attricious
code like this
    if ($bar = (($x_ar[$x] -= $prd + $bar) < 0))
If I was hiring you, I'd fire you on the spot.

Secondly, here is what I came up with. Not sure what '1E7' is though.
And change 'intval' to 'int' if you want to cast something to an int in
python

x,y = cx-cy-1,0
while y <= cy:
    prd = q * y_ar[y] + car - ((car = int(prd / 1E7)) * 1E7);
    if (bar = ((x_ar[x] -= prd + bar) < 0)) x_ar[x] += 1E7;
    x,y = x+1,y+1

Eli



> I'm translating some PHP scripts to Python and have hit a roadblock
> with a for statement.  If someone could explain to me how one should
> translate the multiple increment, evaluations, etc. in the first line
> I would appreciate it deeply ...
>
> for ($y = 0, $x = $cx-$cy-1; $y <= $cy; ++$y,++$x) {
>     $prd = $q * $y_ar[$y] + $car;
>     $prd -= ($car = intval($prd / 1E7)) * 1E7;
>     if ($bar = (($x_ar[$x] -= $prd + $bar) < 0)) $x_ar[$x] += 1E7;
>     }
>
> thanks,
>
> Davis




From aahz at pythoncraft.com  Sun Jan  4 19:42:23 2004
From: aahz at pythoncraft.com (Aahz)
Date: 4 Jan 2004 19:42:23 -0500
Subject: Proposal: new peps always in clpa
References: <mailman.80.1073238516.12720.python-list@python.org>
	<bt9pm9$rhf$1@panix2.panix.com>
	<mailman.82.1073245693.12720.python-list@python.org>
Message-ID: <btabtf$68t$1@panix1.panix.com>

In article <mailman.82.1073245693.12720.python-list at python.org>,
Gerrit Holl  <gerrit at nl.linux.org> wrote:
>Aahz wrote:
>> In article <mailman.80.1073238516.12720.python-list at python.org>,
>> Gerrit Holl  <gerrit at nl.linux.org> wrote:
>>>
>>>would it be a good idea to automatically sumbit all new peps to
>>>comp.lang.python.announce? After all, each PEP is an announcement and
>>>may be important to the entire Python community. Another possibility
>>>would be to python-dev, but since c.l.py.announce has a broader public,
>>>I'd prefer the first one. What do you think?
>> 
>> That's a good idea, but c.l.py.announce needs to have its Followup-To:
>> set to c.l.py.  I think I asked for that once before, but didn't get a
>> response.
>
>I think Followup-To: should be set to c.l.py for _any_ posting in
>c.l.py.announce, not only for peps, but that is another issue
>altogether.

Exactly.  But currently most announcements to c.l.py.announce don't spawn
discussion, so it hasn't been a critical issue; until Followup-To is
fixed, I'm opposed to requiring PEPs to be posted there.  Note that it's
not trivial, because c.l.py.a has a gateway to an e-mail list, where
Reply-To: should be set.  It'll likely require some Mailman work -- and
c.l.py.a hasn't even been upgraded to current Mailman yet.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

A: No.
Q: Is top-posting okay?


From jcarlson at nospam.uci.edu  Tue Jan 27 17:40:39 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Tue, 27 Jan 2004 14:40:39 -0800
Subject: I support PEP 326
In-Reply-To: <698f09f8.0401271318.21c9ca72@posting.google.com>
References: <mailman.654.1074788734.12720.python-list@python.org>
	<698f09f8.0401271318.21c9ca72@posting.google.com>
Message-ID: <bv6ph8$181$1@news.service.uci.edu>

> I'm also in support of this PEP, and have cases in which I would use
> the new singletons.
> 
> The biggest reason I believe the PEP should be accepted is that you
> simply *can't* "roll your own" in a heterogenous environment.  If I
> have my Min/Max objects and you have your Min/Max objects, someone's
> objects simply aren't going to work as expected.
> 
> I'm in favor of Minimum and Maximum, though, if only for ease in
> discussing Python: the capital isn't obvious both verbally or at the
> beginning of a properly written sentence.

Unfortunately, I have a feeling that the PEP may be killed because there 
doesn't seem to be a location/name that is agreeable to those with 
voting power in python-dev.

A new module included into the standard library seems to be the easiest 
way to get it into Python.  However, considering that you cannot 
guarantee that the Max/Min will get their __cmp__ method called (when 
comparing against user-defined classes), you cannot guarantee the ordering.

If it were to get special treatment, by including it as a pseudo-builtin 
(always in Python, but doesn't have a name in __builtin__), it is a 5 
line modification to PyObject_Compare in object.c to guarantee the 
orderings with Max/Min:
http://mail.python.org/pipermail/python-dev/2004-January/042275.html


That email also makes a case for min() and max() returning the minimum 
and maximum object respectively, whose string representations would be 
'min()' and 'max()' respectively.  It would result in the overloading of 
the min and max functions, but there is no general consensus in 
python-dev; some people like it due to its similarity to using int(), 
list(), dict(), float(), str(), long(), etc., but others (including 
Guido himself) think that min() and max() /should/ produce TypeErrors.

I'm thinking that maybe it should produce a warning for a release or two 
(that it used to produce a TypeError, unless 'from future import 
extremes' is at the beginning of a script), but in Python 2.5 or 2.6 
remove the warning.

Yeah.  If someone has a strong opinion either way, perhaps you should 
comment in python-dev.  If anyone has a better name/location suggestion, 
(that is not listed as an option in the current or previous versions in CVS:
http://python.org/peps/pep-0326.html
http://cvs.sourceforge.net/viewcvs.py/*checkout*/python/python/nondist/peps/pep-0326.txt?content-type=text%2Fplain&rev=1.2
), you suggestions are definitely appreciated.

Thank you,
  - Josiah


From michael at stroeder.com  Fri Jan 23 05:54:03 2004
From: michael at stroeder.com (=?ISO-8859-1?Q?Michael_Str=F6der?=)
Date: Fri, 23 Jan 2004 11:54:03 +0100
Subject: ANN: python-ldap-2.0.0pre19
Message-ID: <mailman.1074868925.11387.clpa-moderators@python.org>

Find a new pre-release of python-ldap:

   http://python-ldap.sourceforge.net/

python-ldap provides an object-oriented API to access LDAP directory
servers from Python programs. It mainly wraps the OpenLDAP 2.x libs for
that purpose. Additionally it contains modules for other LDAP-related
stuff (e.g. processing LDIF, LDAPURLs and LDAPv3 schema).

----------------------------------------------------------------
Released 2.0.0pre19 2004-01-22

Changes since 2.0.0pre18:

Modules/:
* LDAPObject.c:
   Most deprecated functions of OpenLDAP C API are not used anymore.
* functions.c:
   Removed unused default_ldap_port().
* constants.c:
   Removed unused or silly constants
   AUTH_KRBV4, AUTH_KRBV41, AUTH_KRBV42, URL_ERR_BADSCOPE, URL_ERR_MEM
* errors.c:
   Fixed building with OpenLDAP 2.2.x
   (errors caused by negative error constants in ldap.h)

ldap.ldapobject.LDAPObject:
* Removed unused wrapper methods uncache_entry(), uncache_request(),
   url_search(), url_search_st() and url_search_s()
* New wrapper methods for all the _ext() methods in _ldap.LDAPObject.

ldap.modlist:
* Some performance optimizations and simplifications
   in function modifyModlist()



From jacek.generowicz at cern.ch  Mon Jan 12 10:13:52 2004
From: jacek.generowicz at cern.ch (Jacek Generowicz)
Date: 12 Jan 2004 16:13:52 +0100
Subject: Why learn Python ??
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<btubno$bd8k6$1@ID-46268.news.uni-berlin.de>
Message-ID: <tyf1xq5fbdb.fsf@pcepsft001.cern.ch>

"Derek" <none at none.com> writes:

> I would also add that while Lisp has been a favorite in the AI
> community, you will find that most AI techniques generalize to most
> any programming language.  I spent a good deal of time in grad school
> and on my first job doing AI programming in C++.  The only time I used
> Lisp was in introductory classes, mostly to write elegant -- but
> toy -- programs.

Lest Derek give the impression that Lisp is in any way a "toy"
language, or that it somehow sacrifices practicality for elegance, I
feel honour bound to point out that it is actually the most powerful
and expressive programming language known to man, and excells in
solving problems which are often considered too hard to be solved in
other languages.

If you want to perform miracles, then learn Lisp. If you
merely want to write programs that rock, then learn Python.

:-)

If, however, masochism is more you bent, then I thoroughly recommend C++.

--
Greenspun's Tenth Rule of Programming:

  Greenspun's Tenth Rule of Programming: "Any sufficiently complicated
  C or Fortran program contains an ad-hoc, informally-specified,
  bug-ridden, slow implementation of half of Common Lisp."


From ville.spamstermeister.vainio at thisisspamprotectiontut.finland  Sat Jan 24 05:58:43 2004
From: ville.spamstermeister.vainio at thisisspamprotectiontut.finland (Ville Vainio)
Date: 24 Jan 2004 12:58:43 +0200
Subject: Perl vs. Python for text manipulation
References: <69A0D4AB81C51447AD6BA387782B8D64093D8A@midl-mail4.etcconnect.com>
	<028FD9F0-4E01-11D8-BB78-0003934ACDEC@zdome.net>
	<mailman.720.1074906442.12720.python-list@python.org>
	<1013o27e3nb141@corp.supernews.com>
	<ouhdyloduy.fsf@andlx-anamika.cisco.com>
Message-ID: <du73ca5r4t8.fsf@amadeus.cc.tut.fi>

>>>>> "Ganesan" == Ganesan R <rganesan at myrealbox.com> writes:

    Ganesan> is nearly 6 times slower in python (8 time slower with
    Ganesan> Python 2.2) using fileinput. Every appears to know that
    Ganesan> fileinput is slower and avoid it when performance is a
    Ganesan> concern; but even manually doing the equivalent is slower
    Ganesan> in python. I've simply switched back to using perl for my

A while back someone fixed his python script to use normal files
instead of stdin, and the Python version proved to be even faster than
the Perl version. Have you tried that?

-- 
Ville Vainio   http://tinyurl.com/2prnb


From jason at tishler.net  Tue Jan 27 09:46:36 2004
From: jason at tishler.net (Jason Tishler)
Date: Tue, 27 Jan 2004 09:46:36 -0500
Subject: Error under Cygwin - threading module
In-Reply-To: <b840abf4.0401221419.343cb5e1@posting.google.com>
References: <b840abf4.0401221419.343cb5e1@posting.google.com>
Message-ID: <20040127144636.GA1204@tishler.net>

AdSR,

On Thu, Jan 22, 2004 at 02:19:31PM -0800, AdSR wrote:
> Nothing relevant found on Google for this, so I'm asking here. I wrote
> a short script that launches several threads (parallel download using
> urllib.urlretrieve in this case). Sometimes when I launch my script
> under Cygwin, I get strange error messages like:
> 
>       2 [win] python 1912 Winmain: Cannot register window class
> 
> Sometimes all of the threads run OK, otherwise after the "correct"
> ones finish the console stops responding anyway.

FWIW, I cannot reproduce the above problem under:

    $ cygcheck -cd cygwin python
    Cygwin Package Information
    Package              Version        
    cygwin               1.5.5-1        
    python               2.3.2-1

and

    Windows 2000 SP4

What Cygwin, Python, Windows versions are you using?

Have you tried a recent Cygwin snapshot?  Some pthread bugs have been
fixed since 1.5.5-1.

> No problems directly under Windows,

What does the above mean?  Under Win32 Python?  Or, under cmd.exe?

> What is wrong?

Sorry, I don't know.

Jason

-- 
PGP/GPG Key: http://www.tishler.net/jason/pubkey.asc or key servers
Fingerprint: 7A73 1405 7F2B E669 C19D  8784 1AFD E4CC ECF4 8EF6



From CousinStanley at hotmail.com  Wed Jan  7 08:07:23 2004
From: CousinStanley at hotmail.com (Cousin Stanley)
Date: Wed, 7 Jan 2004 06:07:23 -0700
Subject: compileall binaries don't run!?
References: <798d4337.0401062132.1e82ee65@posting.google.com>
Message-ID: <bth07n$736hv$1@ID-130333.news.uni-berlin.de>

| ...
| And the output looks fine, resulting in a bunch of pyc files.
|
| Then I try running the pyc file eg.:
|
| /home/me/mySourceDir/doodad.pyc
|
| But get the following error:
| bash: ./doodad.pyc: cannot execute binary file

Daniel .... 

  As the  .pyc  files are not stand-alone executables,
  you might try passing the path of the compiled file
  to the Python interpreter .... 

      python /home/me/mySourceDir/doodad.pyc 

-- 
Cousin Stanley
Human Being
Phoenix, Arizona



From mcfletch at rogers.com  Sun Jan 25 17:49:37 2004
From: mcfletch at rogers.com (Mike C. Fletcher)
Date: Sun, 25 Jan 2004 17:49:37 -0500
Subject: MySQL insert query problem
In-Reply-To: <pan.2004.01.25.22.28.29.641943@lolmc.com>
References: <pan.2004.01.25.22.28.29.641943@lolmc.com>
Message-ID: <40144801.3010305@rogers.com>

Did you by any chance declare the field to be 19 characters wide when 
creating the database?  Truncating to the length of the field is, I 
think, normal SQL practise.

Just a thought,
Mike

Lol McBride wrote:
...

>varchar field in a database I'm using. The query being sent to the MySQL
>server  by my program is : INSERT INTO analysis (DrawNumber,pool1)VALUES
>(847, ' (4, 8, 21, 24, 39, 44) ' ) ;
>
>But the field pool1 actually contains  (4, 8, 21, 24, 39, i.e it is
>missing the final digits ( 44 ) 
>
...

_______________________________________
  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://members.rogers.com/mcfletch/





From mark at mceahern.com  Sun Jan 18 12:46:42 2004
From: mark at mceahern.com (Mark McEahern)
Date: Sun, 18 Jan 2004 11:46:42 -0600
Subject: xml.dom.minidom childnodes
In-Reply-To: <400abcab$0$780$ba620e4c@news.skynet.be>
References: <400abcab$0$780$ba620e4c@news.skynet.be>
Message-ID: <1074448002.18656.33.camel@dev.internal>

On Sun, 2004-01-18 at 11:04, Vincent De Baere wrote:
> As you can see in the xml file, there is a newline after the (root) 
> documentelement. I guess that's why I need to use menurootchildren[1] 
> instead of menurootchildren[0] to access the first child.

Why not use getElementsByTagName and punt on the whole variable
whitespace as childNodes business?

Cheers,

// m




From FBatista at uniFON.com.ar  Fri Jan 30 13:21:11 2004
From: FBatista at uniFON.com.ar (Batista, Facundo)
Date: Fri, 30 Jan 2004 15:21:11 -0300
Subject: PEP 327: Decimal Data Type
Message-ID: <A128D751272CD411BC9200508BC2194D03383566@escpl.tcp.com.ar>

Stephen Horne wrote:

#- My concern is that many people will use a decimal type just 
#- because it
#- is there, without any consideration of whether they actually need it.

Speed considerations are raised. You'll *never* get the performance of using
floats or ints (unless you have a coprocessor that handles this).


#- I don't know what the solution should be, but I do think it needs to
#- be considered.

(In my dreams) I want to "float" to be decimal. Always. No more binary.
Maybe in ten years the machines will be as fast as is needed to make this
posible. Or it'll be implemented in hardware. 

Anyway, until then I'm happy having decimal floating point as a module.

.	Facundo



From bobx at linuxmail.org  Thu Jan 15 19:50:35 2004
From: bobx at linuxmail.org (Robert)
Date: Fri, 16 Jan 2004 00:50:35 GMT
Subject: wxPython worries
In-Reply-To: <mailman.352.1074092092.12720.python-list@python.org>
References: <mailman.352.1074092092.12720.python-list@python.org>
Message-ID: <vzGNb.577$jc4.292927@news2.news.adelphia.net>

What is needed is a good "Programming wxPython"!


From http  Tue Jan  6 19:09:13 2004
From: http (Paul Rubin)
Date: 06 Jan 2004 16:09:13 -0800
Subject: Iterating over a binary file
References: <btf5j8$6g26f$1@ID-46268.news.uni-berlin.de>
	<7xznd04ww1.fsf@ruckus.brouhaha.com>
	<du7ptdwsq1t.fsf@lehtori.cc.tut.fi>
Message-ID: <7xd69wy5zq.fsf@ruckus.brouhaha.com>

Ville Vainio <ville.vainio at spamster_tut_remove.fi> writes:

> Paul Rubin <http://phr.cx at NOSPAM.invalid> writes:
>
> > > The above code works, but I don't like making two read() calls.  Any
> > > way to avoid it, or a more elegant syntax?  Thanks.
> >
> > You can make it even uglier:
> >
> >     f = file(filename, 'rb')
> >     while 1:
> >       data = f.read(1024)
> >       if len(data) <= 0:
> >         break
> >       someobj.update(data)
> >     f.close()
> >
> > There's been proposals around to add an assignment-expression operator
> > like in C, so you could say something like
> >
> >     f = file(filename, 'rb')
> >     while len(data := f.read(1024)) > 0:
> >       someobj.update(data)
> >     f.close()
>
> It's funny, but I find the first version much more readable than the
> second one. Especially if I consciously forget the "do lots of stuff
> in condition part of while" indoctrination from C. If there is lots of
> stuff in while you have to stare at it a bit more, and it becomes
> "idiomatic", something you learn, perhaps even cookbook stuff, instead
> of obvious-as-such.

Idioms exist because they're useful, and there's already plenty of
them in Python, like ''.join(stringlist) or "for i in xrange(n)" etc.

Maybe the condition in the while statement makes that statement twice
as hard to read.  However, the example as a whole can still be easier,
simply because it's shorter.

Version 1:

    Statement                              Reading difficulty
    =========                              ==================

      f = file(filename, 'rb')                     1
      while 1:                                     1
        data = f.read(1024)                        1
        if len(data) <= 0:                         1
          break                                    1
        someobj.update(data)                       1
      f.close()                                    1

    Total reading difficulty:                      7

Now the second version:

    Statement                              Reading difficulty
    =========                              ==================

       f = file(filename, 'rb')                    1
       while len(data := f.read(1024)) > 0:        2
         someobj.update(data)                      1
       f.close()                                   1


    Total reading difficulty:                      5

I got through college on a version of this reasoning.  I was a math
major.  I had friends studying history and literature who said "that's
a hard subject", but I thought they were crazy.  But in a normal math
class, there's one textbook that you use for the whole semester, and
you cover maybe half the chapters in it.  I was able to keep up.  But
in a literature course, you usually have to read a different entire
book from cover to cover EVERY WEEK.  I took a couple classes like
that and barely survived.  Yes, it takes a lot more effort to read a
page of a math book than a page of a novel.  When you compare the
total reading load though, math was a much easier major than
literature or history.  

It's the same with programs.  I'd rather read 5 lines of tight code
that each actually does something, than 3 pages of loose code (the
kind that's usually written in Java) that spastically meanders trying
to do the same thing, even if the individual loose lines are easier to
read than the tight lines.


From mhammond at skippinet.com.au  Fri Jan 30 19:09:53 2004
From: mhammond at skippinet.com.au (Mark Hammond)
Date: Sat, 31 Jan 2004 11:09:53 +1100
Subject: pythonwin woes
In-Reply-To: <a7c2c93c.0401301309.4e61c606@posting.google.com>
References: <a7c2c93c.0401301309.4e61c606@posting.google.com>
Message-ID: <bveron$1h6n$1@arachne.labyrinth.net.au>

oliver wrote:

> Hi,
> 
> I am trying my hands on the latest verion of pythonwin extension with
> python 2.3.3 , and run into *semi-fatal* problem:  the run command
> ignores the modifications I made to the source code,  and *always*
> show me results given by that outdated source: it feels like it just
> use that cached .pyc!!!
> 
> I wonder if the other pythonwin users had experienced the same
> problem, or did I miss anything here. There is no such problem in IDLE
> though.

The difference will be that Pythonwin runs all programs "in process". 
When you run a program for the second time, all of the 'import' 
statements are still using the same module they imported before.  The 
solution is generally to *reload* the modules you change, before you run 
the main script.  Pressing Ctrl+I will do that for you - it will reload 
the module if it was previously imported.  After doing that, your main 
script should see the new modules.

IDLE runs all programs in a new, external Python process, so never sees 
this issue.  In lots of ways, I like the way Pythonwin does it - keeping 
that state around can be very useful - eg, after the program has 
terminated, you can still see the objects etc.

Mark.



From EP at zomething.com  Sat Jan  3 02:01:15 2004
From: EP at zomething.com (EP)
Date: Fri, 02 Jan 2004 23:01:15 -0800
Subject: Speed?
In-Reply-To: <efa6f675.0401021920.3bffced0@posting.google.com>
Message-ID: <5.2.0.9.0.20040102221218.00b7c870@mail.zomething.com>


On questions of the suitability of Python for CGI, embedded apps, etc., 
execution speed comes to mind.  I previously read some comparisons which 
did not show Python in a good light in this regard: i.e. Python is slow 
compared to Perl, C++, Java.

http://www.flat222.org/mac/bench/

Is there more authoritative and current information IRT speed comparisons?

Is newer Python any faster?

Also, if Python is a bit slower in execution than some alternative 
languages, what do others do in practice to speed it up, and how much of 
that optimization do they do?  Or is a slower speed to be accepted like one 
learns to accept that their lovely bride takes a long time getting ready to 
go out ?

TIA,


Eric

P.S.  I tried to replicate the simple "console test" with Python 2.3 on my 
PC.  Using the Windows command prompt, on a reasonably modern PC (128MB 
RAM, 1.3 AMD chip),  I clocked 72.45 seconds to print the numbers up to 
999,999, which is more than 3x as long as the results reported in the link 
given.

Then running the same program out of IDLE I clocked 627.48 seconds printing 
the numbers only up to 99,999.  Perhaps that's a caution about launching 
any large processes out of IDLE?  Here's the  test script:

import time

def loop_time():
	start=time.time()
	for x in xrange(1000000):
	    print x
	end=time.time()
	exectime=end-start
	return exectime

nada=raw_input('Press return when ready')
run=loop_time()
print 'Timed loop ran for:    '+str(run)+'  seconds'





From crawley.storm.nospanatallever at ntlworld.com  Thu Jan 29 18:00:16 2004
From: crawley.storm.nospanatallever at ntlworld.com (Crawley)
Date: Thu, 29 Jan 2004 23:00:16 +0000
Subject: win32com support
Message-ID: <Xns947FEAF73D102crawleystormntlworld@217.158.240.24>

Im trying to produce a small Visual Studio Addin.  Taking the 
OutlookAddin example and changing the registry place it installs too, 
everything works ok.  

Examples in C++ show that in the OnConnection method I have to registry 
my commands and also pass an instance of my sub class of ICommands.

The C code looks like this:

	IApplication* pApplication = NULL;
	pApp->QueryInterface(IID_IApplication, (void**) &pApplication)

	CCommandsObj::CreateInstance(&m_pCommands);
	m_pCommands->AddRef();
	m_pCommands->SetApplicationObject(pApplication);

	pApplication->SetAddInInfo((long) AfxGetInstanceHandle(),                                       
(LPDISPATCH) m_pCommands, -1, -1, m_dwAddin));


So far Im trying something like this:

        self._command = VCCmd(application)
        application.SetAddInInfo(AfxGetInstanceHandle(), self._command, -
1, -1, addin )        
 

with VCCmd defined like:

class VCCmd:
    _com_interfaces_ = ['_ICommands']
    _public_methods_ = []
    
    _application = None
    
    def __init__( self, app ):
        self._application = app
        print "VCCmd __init__"


Needless to say, its not working, so questions.

1) AfxGetInstanceHandle dosent appear to exist in the win32api... so how 
do I call it.

2) am I defining VCCmd correctly to be a subclass of ICommands

3) am I correct in thinking i dont have to explicitly 'cast' application 
into an IApplication instance

Many thanks for any light you may be able to shed on the subject

Rich


From adim at logilab.fr  Tue Jan 27 12:34:07 2004
From: adim at logilab.fr (Adrien Di Mascio)
Date: Tue, 27 Jan 2004 17:34:07 +0000 (UTC)
Subject: descriptors and old-style classes
Message-ID: <slrnc1d88e.qr.adim@lacerta.logilab.fr>

Hi,

I've recently discovered that descriptors can be used with old-style
classes if they don't define a __set__ method (and this would be why
class and static methods are usable with old-style classes).
I understand why the __set__ method is not called with old-style
classes, but I don't understand why __get__ *is* called.
I thought the transformation from :
  a.x
into :
  type(a).__dict__['x'].__get__(a, type(a))
was done in object.__getattribute__ (or type.__getattribute__), but then
this does not explain why this also seems to work with old-style
classes.

Could someboby help me here ??

Cheers,
Adrien.

-- 
Adrien Di Mascio
LOGILAB, Paris (France).
http://www.logilab.com   http://www.logilab.fr   http://www.logilab.org



From usenet_spam at janc.invalid  Fri Jan  9 15:28:42 2004
From: usenet_spam at janc.invalid (JanC)
Date: Fri, 09 Jan 2004 20:28:42 GMT
Subject: Python Utils - A simple config file parser and output object
References: <8089854e.0401070044.1e8116ad@posting.google.com>
	<8089854e.0401090212.4826925d@posting.google.com>
Message-ID: <Xns946BDA7D0E054JanC@213.119.4.35>

michael at foord.net (Fuzzyman) schreef:

> I have to use google groups to post these messages as our work
> firewall block nntp.... I'm thinking of building a newsgroup reader
> that uses google groups via http but provides a better interface...
> anyone interested ??

Some news servers allow connections on port 80 or other alternatives.
(The free news.readfreenews.net server does, but it doesn't allow posting,)

Also comp.lang.python is linked to the python mailing list:
<http://python.org/community/lists.html>

-- 
JanC

"Be strict when sending and tolerant when receiving."
RFC 1958 - Architectural Principles of the Internet - section 3.9


From cookedm+news at physics.mcmaster.ca  Sun Jan 11 18:03:10 2004
From: cookedm+news at physics.mcmaster.ca (David M. Cooke)
Date: Sun, 11 Jan 2004 18:03:10 -0500
Subject: Python is far from a top performer according to benchmark
 test...
References: <ryELb.238$tK2.228@amstwist00> <btn5db$2f8$1@absinth.dialog.net.pl>
	<pan.2004.01.09.21.35.40.132608@yahoo.com>
	<6ee58e07.0401092129.302cb9d4@posting.google.com>
	<pan.2004.01.11.06.08.18.867825@yahoo.com>
Message-ID: <qnksmimf5qp.fsf@arbutus.physics.mcmaster.ca>

At some point, Samuel Walters <swalters_usenet at yahoo.com> wrote:
>
> Whether one uses Fortran, Python, or any other language, all primitives
> are eventually implemented in either C or assembly.  At some point or
> another, we end up scraping bare metal and silicon to get our answers.  
> The question then becomes, "How easily can I extend this language to fit
> my needs."  NumPy is evidence that at least a few people said "Easily
> enough."  I don't know how extensible Fortran is, but I would guess "very"
> since I've heard of it being applied in many domains other than numerical
> processing.  (OpenFirmware, for example.)

You're confusing Fortran with Forth, which is a stack-based language,
much like Postscript, or RPL used on HP 48 calculators.

These days, I doubt Fortran is used for anything but numerical processing.

-- 
|>|\/|<
/--------------------------------------------------------------------------\
|David M. Cooke
|cookedm(at)physics(dot)mcmaster(dot)ca


From newz at wilcomm.net.NOSPAM  Thu Jan  1 07:16:43 2004
From: newz at wilcomm.net.NOSPAM (Wil Schultz)
Date: Thu, 01 Jan 2004 04:16:43 -0800
Subject: Where to go from here? newbee
In-Reply-To: <bt0asa02hj8@enews1.newsguy.com>
References: <bt0asa02hj8@enews1.newsguy.com>
Message-ID: <vv83njb7httmed@corp.supernews.com>

If you are sure you're up to it, here's a good place to start...
http://www.ibiblio.org/obp/thinkCSpy/

Wil
my 2?
"When everything seems to be going well, you have obviously overlooked
something."


Richard wrote:
> Just downloaded python for the fun of it.
> What do I run to begin coding with?
> Version 2.3.3
> 
> When I run the "command line" thing, I get a dos window.
> Now what?
> 
> The built in tutor explains some basics about programming but zilch on where
> to begin.
> 
> 
> BTW, you have 357 days left to do your christmas shopping.
> 
> 
> 


From michele.simionato at poste.it  Sun Jan 25 05:51:41 2004
From: michele.simionato at poste.it (Michele Simionato)
Date: 25 Jan 2004 02:51:41 -0800
Subject: perl bug File::Basename and Perl's nature
References: <7fe97cc4.0401242131.22acf485@posting.google.com>
Message-ID: <95aa1afa.0401250251.30810821@posting.google.com>

xah at xahlee.org (Xah Lee) wrote in message news:<7fe97cc4.0401242131.22acf485 at posting.google.com>...
<snip trollish rants against Perl>

Please, at least don't cross-post (and don't make me to cross post).

                               _____________________
                   /|  /|     |                     |
                   ||__||     |    Please do not    |
                  /   O O\__  |   feed the          |
                 /          \ |     Trolls          |
                /      \     \|_____________________|
               /   _    \     \      ||
              /    |\____\     \     ||
             /     | | | |\____/     ||
            /       \|_|_|/   |     _||
           /  /  \            |____| ||
          /   |   |           |      --|
          |   |   |           |____  --|
   * _    |  |_|_|_|          |     \-/
*-- _--\ _ \                  |      ||
  /  _     \\        |        /      `
*  /   \_ /- |       |       |
  *      ___ c_c_c_C/ \C_c_c_c____________


From james at logicalprogression.net  Thu Jan 15 09:13:27 2004
From: james at logicalprogression.net (James Henderson)
Date: Thu, 15 Jan 2004 14:13:27 +0000
Subject: TUPLE & LIST
In-Reply-To: <%7xNb.55$Uw3.50@newsr2.u-net.net>
References: <%7xNb.55$Uw3.50@newsr2.u-net.net>
Message-ID: <200401151413.28003.james@logicalprogression.net>

On Thursday 15 January 2004 2:08 pm, Yomanium Yoth Taripo? II wrote:
> HI,
>
> 1) what are the differences between list and tuple?
> 2) how to concatenate tuple and list? no method, no op?ator?
> 3) im looking the fucking manual, and cant add value in my tuple, when it
> already created :/
>   how to do it?
>
> thx.

3) is your answer to 1) !
-- 
James Henderson, Logical Progression Ltd.
http://www.logicalprogression.net/




From mxlaym009 at hotmail.com  Sun Jan 11 18:39:20 2004
From: mxlaym009 at hotmail.com (M. Laymon)
Date: Sun, 11 Jan 2004 23:39:20 GMT
Subject: Python installation breaks Outlook Express
Message-ID: <ikn30011doe8o972u0d67j1dvrjs2si1v8@4ax.com>

I just installed Python 2.3.3 under Windows XP professional.   After I
did, my wife tried to access her email using Outlook Express and got
the error messages:

Your server has unexpectedly terminated the connection. Possible
causes for 
this include server problems, network problems, or a long period of
inactivity. 
Account: 'incoming.verizon.net', Server: 'outgoing.verizon.net', 
Protocol: SMTP, Port: 25, Secure(SSL): No, Error Number: 0x800CCC0F

Your server has unexpectedly terminated the connection. Possible
causes for this 
include server problems, network problems, or a long period of
inactivity. 
Account: 'incoming.verizon.net', Server: 'incoming.verizon.net',
Protocol: POP3, 
Port: 110, Secure(SSL): No, Error Number: 0x800CCC0F

 (No comments about Outlook, please.I have tried to get her to use a
different email program, but she likes Outlook.)   I checked the
settings, then recreated her account in Outlook, but nothing worked.
My Mozilla Thunderbird email client worked fine.

Since the only thing I had done recently was to install Python.  I
used system restore to go back to the point before installing Python.
After I did, Outlook started working again.  Has anyone else seen this
behavior ?

Thanks.

M. Laymon


From luszczek1 at netscape.net  Sat Jan  3 22:47:56 2004
From: luszczek1 at netscape.net (luszczek1 at netscape.net)
Date: Sat, 03 Jan 2004 22:47:56 -0500
Subject: Advanced (?) compiling, freezing, translating Python
Message-ID: <312735AC.3841CC26.0331AA34@netscape.net>

Hi,

here's my problem:

- I know it will take me 10 times as long to write a code in C than in
  Python
- I need the speed of the C version
- my program cannot depend/require on Python
  interpreter/libraries/modules

Is there a way to write Python program that almost looks like (say) C
and then transoform it into C. Transformation should be intelligent -
I don't want dynamic objects with dictionaries of methods. I'm willing
to provide type descriptions so when I say:
myList = [0] * 100

I get in C:
int *myList;
myList = calloc(100, sizeof(int));

I'm aware of projects like Pyrex, Psyco, and Pypy but their scope is
too broad: they are about Python in its entirety and dynamism.
There was also discussion some time back about adding static typing to
Python. This is not what I'm thinking about either.

I gave C as an example, but what I meant was translating Python
into another language with some additional guidance (command-line
optons or "header files"). I believe that Python is rich enough
to express most of semantics of most of languages. For example,
C++ templates are included in Python by default:

In Python:
def sum(aList):
    v = 0
    for e in aList: v += e

In C++:
template <class T> sum(Vector<T> aList) {...}

In case anybody would care, even primitive data types from C/C++ like
float, short, etc. can be emulated in Python with array module. I don't
see equivalence to C++ reference, value, and pointer semantics, but most
folks can live without it.

Does anything like this exist? Would anybody find it useful?
With compiler module now in standard Python, it seems like an easy job.
Or am I missing something?

Peter


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From tim at remove_if_not_spam.digitig.co.uk  Sun Jan 11 18:45:48 2004
From: tim at remove_if_not_spam.digitig.co.uk (Tim Rowe)
Date: Sun, 11 Jan 2004 23:45:48 +0000
Subject: Division oddity
Message-ID: <ssn3009029rrug3l8dk1pn06tqd019ucld@4ax.com>

If I do from __future__ import division then eval(1/2) gives me 0.5 as
expected. But if I do print input("enter a sum: ") and enter 1/2 as
the sum I get 0 as if I hadn't done the import.  I thought input was
supposed to give the same behaviour as an eval on raw input -- why the
difference here?


From jepler at unpythonic.net  Thu Jan  8 17:06:54 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Thu, 8 Jan 2004 16:06:54 -0600
Subject: Strings with null bytes inside sqlite
In-Reply-To: <btkg7i$eh4$1@news-reader1.wanadoo.fr>
References: <btkg7i$eh4$1@news-reader1.wanadoo.fr>
Message-ID: <20040108220654.GE14102@unpythonic.net>

It depends on the structure of the string, but using
s.encode("string-escape") / e.decode("string-escape") may give better
performance and better storage characteristics (if your data is mostly
ASCII with a few NULs included).  If chr(0) is the only problem value,
then creating your own encoder/decoder may be better, translating
'\0' -> '\\0' and '\\' -> '\\\\'.

Jeff



From tim.one at comcast.net  Mon Jan 12 10:45:56 2004
From: tim.one at comcast.net (Tim Peters)
Date: Mon, 12 Jan 2004 10:45:56 -0500
Subject: Databases: Which one's right for me?
In-Reply-To: <9a6d7d9d.0401120658.5b9ee522@posting.google.com>
Message-ID: <LNBBLJKPBEHFEDALKOLCIEAIIFAB.tim.one@comcast.net>

[Aaron Watters]
> Reading the blog it seems you are right.  I wish zodb would be
> a bit more careful in its claims.  When you say "zodb supports
> the ACID properties of transactions" this has a precise meaning
> which vanishes when you redefine all the letters.

I haven't made a claim about what ZODB does, I've just pointed you to what
others have said about it.  I'm not sure what you're referring to here, but
guess it's probably taken from:

    http://zope.org/Wikis/ZODB/FrontPage/guide/node3.html

If so, the meanings it intends for each letter are given there.  I don't
think its

    Isolation
        means that two programs or threads running in two different
        transactions cannot see each other's changes until they
        commit their transactions.

misrepresents what ZODB does.

> In particular it suggests that zodb would be good for something
> like an accounting or banking application which would require strict
> transaction isolation (serializability).  The looser definition
> could lead to fairly unpleasant difficulties (law suits, jail
> time...). Sorry, had to complete my thought on clp.

Would the text above imply "strict transaction isolation (serializability)"
to such a programmer?  If so, it probably ought to change.




From M.Boeren at guidance.nl  Mon Jan 19 07:44:11 2004
From: M.Boeren at guidance.nl (Marc Boeren)
Date: Mon, 19 Jan 2004 13:44:11 +0100
Subject: Oracle to Mysql, I'm (still) lost...
Message-ID: <7BE0F4A5D7AED2119B7500A0C94C58AC3D6F0C@DELLSERVER>


Hi,

instead of

>     cursMy.execute("insert into %s values %s", (tabel, a_oracle))

Try:

sql = "insert into "+ tabel +" values ("
comma = ""
for value in a_oracle:
    sql+= comma + "%s"
    comma = ", "
sql+= ")"

or better:

sql = "insert into %s values (" % tabel
sql+= ", ".join(["%s"] * len(a_oracle))
sql+= ")" 
cursMy.execute(sql, a_oracle)

which does the same thing.

Your original sql-statement looked (for the execute call) like it needed two
(sql-style)parameters, when in fact it needs as much parameters as there are
fields in the table. And, the table-name is not an sql-parameter, it is just
something that needs filling in...

Hope this helps,

Cheerio, Marc.



From skchim0 at engr.uky.edu  Sun Jan 25 22:20:12 2004
From: skchim0 at engr.uky.edu (satish)
Date: Mon, 26 Jan 2004 03:20:12 +0000
Subject: Too many indices
Message-ID: <200401260320.12070.skchim0@engr.uky.edu>

Hi all,

I tried to run a small script when I got the following IndexError. Can someone 
help me in explaining this error ?

Traceback (most recent call last):
  File "satish.py", line 36, in ?
    mesh = Mesh(db['x'], db['y'], db['z'])
  File "/usr/lib/python2.2/site-packages/LESTool/CFD_database.py", line 208, 
in __getitem__
    self.readCoords()
  File "/usr/lib/python2.2/site-packages/LESTool/CFD_database.py", line 239, 
in readCoords
    self.data[cgns.x] = MA.array(self.data['coordinates'][0,:,:,:])
IndexError: too many indices

Thanks

Regards,
Satish


-- 
SATISH KUMAR CHIMAKURTHI
Graduate Teaching Assistant
CFD GROUP
UNIVERSITY OF KENTUCKY
LEXINGTON
KENTUCKY - 40508
Email: skchim0 at engr.uky.edu
Mobile: 859-312-8425



From deets_noospaam at web.de  Sun Jan  4 08:11:22 2004
From: deets_noospaam at web.de (Diez B. Roggisch)
Date: Sun, 04 Jan 2004 14:11:22 +0100
Subject: how to make a code object a function
Message-ID: <bt93ds$tuv$00$1@news.t-online.com>

Hi,

I've got code objects that are created from strings at runtime that look
like this:

def p_op1(_, args):
    _.add_dependency('p_op1')

As you migth guess, p_op1 is supposed to become an instance method. Now how
do I make this code object a function-object that can be set into the
instances __dict__ to make it a callable method? 

Thanks for any advice,

Diez B. Roggisch


From peter at engcorp.com  Tue Jan 27 17:41:32 2004
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 27 Jan 2004 17:41:32 -0500
Subject: makeExe.py
References: <mailman.853.1075211290.12720.python-list@python.org>
	<4016E237.97F88A36@engcorp.com>
Message-ID: <4016E91C.8F3FE795@engcorp.com>

Also just stumbled across this, which works in a similar
fashion (faking the sys.argv list before calling setup() directly.

  ftp://pygame.org/pub/pygame/pygame2exe.py

(This one is customized for pygame programs, but might give you some
good ideas too.)

-Peter


From ralph at sluiters.de  Wed Jan  7 01:59:32 2004
From: ralph at sluiters.de (Ralph Sluiters)
Date: Wed, 7 Jan 2004 07:59:32 +0100
Subject: Problem: 'Threads' in Python?
References: <btcfjc$pgu$1@nets3.rz.RWTH-Aachen.DE>
	<vvjmju4aflj591@corp.supernews.com>
	<bte1ce$2t5$1@nets3.rz.RWTH-Aachen.DE>
	<qe7rc1-pr3.ln1@beastie.ix.netcom.com>
Message-ID: <btgang$9nh$1@nets3.rz.RWTH-Aachen.DE>

You did everything, but not answer my question. I know what cookies are, but
I don't need cookies here. And you said in your answer "start background
process", that was my question. How can I start a background process.

But I've solved it now,

Ralph




From jepler at unpythonic.net  Thu Jan 29 12:00:38 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Thu, 29 Jan 2004 11:00:38 -0600
Subject: isinstance() bug
In-Reply-To: <E1AmFB0-0004sv-El@mail.python.org>
References: <E1AmFB0-0004sv-El@mail.python.org>
Message-ID: <20040129170037.GF18498@unpythonic.net>

On Wed, Jan 28, 2004 at 09:08:00PM +0100, Michs Vitecek wrote:
> On Wed, 28 Jan 2004 11:32:19 -0600 Skip Montanaro <skip at pobox.com> wrote:
> >You need to compare inode numbers to see if you have the same or different
> >files. 
> >
> >    >>> import stat
> >    >>> os.stat(a.__file__)[stat.ST_INO]
> >    37041L
> >    >>> os.stat(b.__file__)[stat.ST_INO]
> >    37041L
> >
> 
> this could also be used to verify whether the imported module, class etc. 
> comes from the same file without messing with the absolute path and 
> problems related to it. really a good idea, Skip.

I'd have to come out on the -1 side.

First, because it adds complications to the interpreter simply to notify
a programmer of an avoidable problem that should be caught by testing.

Second, I'm not convinced that you won't create some other kind of
problem through cleverness.  For instance, it's perfectly legitimate to
use module-level variables to hold state, and it's perfectly legitimate
for two packages to both contain the same sub-package (for instance, of
modules A and B both use the same non-standard module, they can bundle
it inside their respective namespaces).  But on systems with a small
read-only filesystem, it's also perfectly legitimate to make these two
copies of the same file actually hard-links to the same file.  You've
just broken this arrangement.

Third, I'm not convinced that using inode numbers is guaranteed to work.
In Unix, it at least needs to be the tuple (inode, device), because the
same inode number can appear on multiple devices.  Are you sure that
Python will *never* encounter a system with a bug or limitation that can
make two different files return the same inode number from os.stat()?
(for instance, if an NFS server uses a 64-bit-inode filesystem but must
generate 32-bit inodes for clients because of NFS protocol limitations;
or if a filesystem doesn't really have the concept of an inode number,
like FAT/VFAT filesystems)

Fourth, what is the "inode" or "device" of a module loaded from a ZIP
archive (possible in Python today), or from a URL (possible with the
right import hook, though probably a bad idea)?

Fifth, will it work right if the 'a.m' and 'm' refer to the same file,
but the sequence of actions look like this in the interactive console:

>>> import a.m
# edit m.py in an editor, save
>>> import m

The editor session might change the inode of m.py, meaning that m is not
a.m.  Or, if not, then it will see that a.m is the same as m, so the
imported m will not contain the changes from the editor session.

Sixth, will it work right in the presence of reload()?

>>> import a.m
>>> import m
# edit m.py here, and assume there is no inode number change
>>> reload(a.m)

Is m reloaded too?  What is "correct" in this case?

So I guess that makes me at least -6 if I get a vote for each problem
I can imagine.

Jeff



From ogger at ya.com  Fri Jan  2 14:56:01 2004
From: ogger at ya.com (Ogger)
Date: 2 Jan 2004 11:56:01 -0800
Subject: Firing events in local server (CLSCTX_LOCAL_SERVER)
Message-ID: <56536fdf.0401021156.1c71986b@posting.google.com>

Hello,

I'm trying to develop a COM local server with python using Mark
Hammond's win32 extensions, but I have problems when I want to fire an
event.

The COM server has a worker thread and I want to fire an event from
this worker thread passing an argument to the event that is another
automation server (served from the same local server). The error
message is (translated from spanish):

Ignoring COM error to connection. - <pywintypes.com_error instance at
....>
-2147417842, The application called an interface that was in a buffer
for a different subprocess.

I have tried many options, like: changing in
win32com/server/localserver.py the property sys.coinit_flags to
CLSCTX_LOCAL_SERVER, using CoMarshalInterThreadInterfaceInStream to
pass the interface to the worker thread, without success.

Can anybody explain me what is happen?


From webmaster at beyond-thoughts.com  Sun Jan 11 04:07:15 2004
From: webmaster at beyond-thoughts.com (Christoph Becker-Freyseng)
Date: Sun, 11 Jan 2004 10:07:15 +0100
Subject: PRE-PEP: new Path class; more links
In-Reply-To: <vvivefh35qjv9a@news.supernews.com>
References: <vvivefh35qjv9a@news.supernews.com>
Message-ID: <40011243.1060404@beyond-thoughts.com>

I've found some links that might be interresting.

http://www.w3.org/2000/10/swap/uripath.py
http://dev.w3.org/cvsweb/2000/10/swap/uripath.html?rev=1.9	[the doc for it]

Links of the operator.attrgetter / "groupby" iterator discussion in 
python-dev (Jp Calderone posted a hint on it already --- I chose some 
exemplary posts)

http://mail.python.org/pipermail/python-dev/2003-December/040614.html
http://mail.python.org/pipermail/python-dev/2003-December/040628.html
http://mail.python.org/pipermail/python-dev/2003-December/040643.html



Christoph Becker-Freyseng




From jcarlson at uci.edu  Tue Jan 20 17:04:10 2004
From: jcarlson at uci.edu (Josiah Carlson)
Date: Tue, 20 Jan 2004 14:04:10 -0800
Subject: Installing SpamBayes
References: <400c399b_2@newsfeed.slurp.net>
	<up5r00hr648soiun3j6q326ga9n808hf17@4ax.com>
	<400c451a_1@newsfeed.slurp.net>
Message-ID: <20040120135921.1C3F.JCARLSON@uci.edu>

> The instructions that came with SpamBayes says it.  THey say to either run
> the setup.py file in the Python GUI (IDLE) or froma command prompt.  I have
> tried both to no avail...

If you are in windows and your associations are correct, try:
setup.py install

 - Josiah


From seefeld at sympatico.ca  Wed Jan  7 03:02:10 2004
From: seefeld at sympatico.ca (Stefan Seefeld)
Date: Wed, 07 Jan 2004 03:02:10 -0500
Subject: debugging memory management via C API
Message-ID: <3FFBBD02.3010501@sympatico.ca>

hi there,

I'm writing some C python extension and I'd like
to debug the memory management, i.e. run some
tests to see whether I did the ref counting
correctly, etc.

What's the suggested way to do that via the C API ?
Is there some function which I could call at the
very end of an application that will collect some
statistics about the memory (de)allocations done
associated with PyObject construction/destruction ?

Thanks,
		Stefan




From jepler at unpythonic.net  Tue Jan 20 18:50:36 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Tue, 20 Jan 2004 17:50:36 -0600
Subject: always the same object
In-Reply-To: <bukbuo$rqp$1@news.rz.uni-karlsruhe.de>
References: <bukbuo$rqp$1@news.rz.uni-karlsruhe.de>
Message-ID: <20040120235036.GA27049@unpythonic.net>

If you included some code, maybe we'd be able to help you.

>>> struct.unpack("2i", " "*8)
(538976288, 538976288)

struct.unpack returned a tuple.  The tuple happens to be immutable, and
all the things it contains are immutable.  So there's no way to change
ever change the value of this object.  As far as I know, this would be
true for any struct format you care to choose.

(You could change the "value" of an immutable object if it contains some
mutable objects, like this:
	a = ([],)
	b = ([],)
	assert a == b
	a[0].append(0)
	assert a != b
a and b go from equal to unequal, even though a and b are both
immutable)

Jeff



From theller at python.net  Wed Jan  7 09:19:36 2004
From: theller at python.net (Thomas Heller)
Date: Wed, 07 Jan 2004 15:19:36 +0100
Subject: metadocumentation (keyword help)
References: <tyfn091gnk5.fsf@pcepsft001.cern.ch>
	<mailman.144.1073405082.12720.python-list@python.org>
	<3ffb0edf$1@nntp0.pdx.net> <tyfhdz8gn8k.fsf@pcepsft001.cern.ch>
	<d69wnik0.fsf@python.net> <tyfbrpggc6u.fsf@pcepsft001.cern.ch>
Message-ID: <65fnon7r.fsf@python.net>

Jacek Generowicz <jacek.generowicz at cern.ch> writes:

> I always wonder whether I should post concise articles, or wordy ones,
> covering all possbile assumpitons and misconceptions.
>
> It appears that, usually, I get the balance hopelessly wrong :-( Or,
> Note, I did NOT say "How do I ...", I said "Where do I find
> [...] documentation ...".

[...]

> I am NOT interested in a recipe posted here. I want to know where to
> find the official instructions on how it is done, so that I can show
> newbies how to find the information themselves.
>
> "Give a man a fish, and he can eat for a day. Teach a man to fish ...",
> and all that.
>
> If these instructions are, as it seems, absent, then I would
> appreciate advice on what I can do to make them appear in the
> appropriate place, and what the appropriate place might be.

So why don't you try to find out yourself???

Thomas


From carroll at tjc.com  Fri Jan  9 14:48:39 2004
From: carroll at tjc.com (Terry Carroll)
Date: Fri, 09 Jan 2004 19:48:39 GMT
Subject: Unicode and exception strings
References: <svl1xq98gdc.fsf@dresden.uio.no>
	<cf0uvv4m34rgcgoi2nfj3hcgugbah82k96@4ax.com>
Message-ID: <291uvv8qajta6n5qum3c6mtq8nhlrh9puu@4ax.com>

On Fri, 09 Jan 2004 19:44:21 GMT, Terry Carroll <carroll at tjc.com> wrote:

>In one program I have that occasionally runs into a line that includes
>some (UTF-8) Unicode-encoded Chinese characters , I have something like
>this:

Sorry, a stray parenthesis crept in here (since this is a pared down
version of my actual code).  It should read:


  try:
     _display_text = _display_text + "%s\n" % line
  except UnicodeDecodeError:
     try:
         # decode those UTF8 nasties
         _display_text = _display_text + "%s\n" % line.decode('utf-8')
     except UnicodeDecodeError:
         # if that still doesn't work, punt
         # (I don't think we'll ever reach this, but just in case)
         _display_text = _display_text + "%s\n" % repr(line)

> I don't know if this will help you or not.  



From ville.vainio at spamster_tut_remove.fi  Tue Jan  6 16:52:30 2004
From: ville.vainio at spamster_tut_remove.fi (Ville Vainio)
Date: 06 Jan 2004 23:52:30 +0200
Subject: Iterating over a binary file
References: <btf5j8$6g26f$1@ID-46268.news.uni-berlin.de>
	<7xznd04ww1.fsf@ruckus.brouhaha.com>
Message-ID: <du7ptdwsq1t.fsf@lehtori.cc.tut.fi>

Paul Rubin <http://phr.cx at NOSPAM.invalid> writes:

> > The above code works, but I don't like making two read() calls.  Any
> > way to avoid it, or a more elegant syntax?  Thanks.
> 
> You can make it even uglier:
> 
>     f = file(filename, 'rb')
>     while 1:
>       data = f.read(1024)
>       if len(data) <= 0:
>         break
>       someobj.update(data)
>     f.close()
> 
> There's been proposals around to add an assignment-expression operator
> like in C, so you could say something like
> 
>     f = file(filename, 'rb')
>     while len(data := f.read(1024)) > 0:
>       someobj.update(data)
>     f.close()

It's funny, but I find the first version much more readable than the
second one. Especially if I consciously forget the "do lots of stuff
in condition part of while" indoctrination from C. If there is lots of
stuff in while you have to stare at it a bit more, and it becomes
"idiomatic", something you learn, perhaps even cookbook stuff, instead
of obvious-as-such.

> but that's the subject of holy war around here too many times ;-).  Don't
> hold your breath waiting for it.

Probably true. Instead of ":=", I wouldn't mind getting rid of
expressions/statements difference as a whole.

-- 
Ville Vainio   http://www.students.tut.fi/~vainio24


From jepler at unpythonic.net  Tue Jan 13 16:01:57 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Tue, 13 Jan 2004 15:01:57 -0600
Subject: Does anyone else not find the fun in programming...?
In-Reply-To: <d232c5e.0401130823.27fd26ff@posting.google.com>
References: <d232c5e.0401130823.27fd26ff@posting.google.com>
Message-ID: <20040113210157.GD6601@unpythonic.net>

>>> "fun" in "programming"
0  # DANGIT
>>> "programming".find("fun")
-1 # ARGARGHARGH
>>> "programming".index("fun")
ValueError: substring not found in string.index # F***!
>>> assert "programming" is "fun"
AssertionError   # I'm going home

Jeff



From gerrit at nl.linux.org  Thu Jan 29 15:57:38 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Thu, 29 Jan 2004 21:57:38 +0100
Subject: read() on tempfile
In-Reply-To: <afc115ec.0401291041.155b51ee@posting.google.com>
References: <afc115ec.0401291041.155b51ee@posting.google.com>
Message-ID: <20040129205738.GA2867@nl.linux.org>

cherico wrote:
> from tempfile import *
> 
> f = NamedTemporaryFile ()
> f = write ( 'test' )
> print f.read () #here print nothing

Strange, it should raise an Exception. 
I guess you typed it over?

'write' should give a NameError. You want to do f.write, not f=write.
After that, you first want to seek to 0.

Gerrit.

-- 
268. If any one hire an ox for threshing, the amount of the hire is
twenty ka of corn.
          -- 1780 BC, Hammurabi, Code of Law
-- 
PrePEP: Builtin path type
    http://people.nl.linux.org/~gerrit/creaties/path/pep-xxxx.html
Asperger's Syndrome - a personal approach:
	http://people.nl.linux.org/~gerrit/english/



From reply.in.the.newsgroup at my.address.is.invalid  Thu Jan  8 17:56:55 2004
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Thu, 08 Jan 2004 23:56:55 +0100
Subject: python newbie
References: <3ffddcfd$0$16662$ba620e4c@news.skynet.be>
Message-ID: <5unrvv8u1vpske1j464epj4aff0f54k2nf@4ax.com>

broebel:
>first problem is the fact that I started out with a little program who was
>part of a course but the problem is when I launch the program. I don't have
>the time to see the result because the screen closes immediately.
>Can anyone explain what's happening.

The program started, did what it had to do and then terminated :-)

"1   How do I run a Python program under Windows?"
http://www.python.org/doc/faq/windows.html#how-do-i-run-a-python-program-under-windows

-- 
Ren? Pijlman


From nid_oizo at yahoo.com_remove_the_  Mon Jan 12 13:46:33 2004
From: nid_oizo at yahoo.com_remove_the_ (Nicolas Fleury)
Date: Mon, 12 Jan 2004 13:46:33 -0500
Subject: Why learn Python ??
In-Reply-To: <40029dad$0$28706$a729d347@news.telepac.pt>
References: <40029dad$0$28706$a729d347@news.telepac.pt>
Message-ID: <cYBMb.1760$PK6.17325@nnrp1.uunet.ca>

Bicho Verde wrote:
>       Anyone would help me and give me some hints?

- C# is like a MS-specific Java.
- C++ is for system programming where performance is important.  I love 
C++ but I think it was Herb Sutter (a C++ guru) who described C++ as a 
"last resort language" and I must agree.
- Perl is also a very nice language, but I would suggest to basically 
see it as a parsing language and Perl 6 will make perl even better in 
that domain with built-in support for grammars.  And knowing a parsing 
language is a very good thing.  However, for other than that, even if 
Perl has all the functionality, Python is cleaner, simpler and more 
structured and elegant.

If you're interested in AI, I strongly suggest to look at functional 
languages like Lisp dialects.

Don't be afraid to learn many languages, that's the way you will learn 
what is strong about each of them, and that we basically need them all;)

Regards,

Nicolas



From ohgoddearlord at yahoo.com  Tue Jan  6 13:45:59 2004
From: ohgoddearlord at yahoo.com (John)
Date: 6 Jan 2004 10:45:59 -0800
Subject: os.system always opens new window on Windows XP/2000
Message-ID: <d0132d7d.0401061045.73c28639@posting.google.com>

Can anyone tell me how to run a bunch of commands in the same command
line window?  When I do this:

system("command1")
system("command2")
...

it opens a new window for every system call.  The alternative I can
think of is to write out the command to a batch file and run that, but
I'm wondering if there is a better way to do it.

Partly it is annoying to have 20 cmd windows flash on the screen, but
also I don't think it works if I do something like this:

system("set envvar=hi")

since I think the envvar does not persist once the command window is
closed.

thanks!


From tzot at sil-tec.gr  Sat Jan 10 12:33:16 2004
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Sat, 10 Jan 2004 19:33:16 +0200
Subject: Yet another RE question
References: <mailman.259.1073723777.12720.python-list@python.org>
Message-ID: <qed0001orqr7dtagau7a619noeelapldk4@4ax.com>

On Sat, 10 Jan 2004 10:36:07 +0200, rumours say that "Bogdan Marinescu"
<bogdanal at b.astral.ro> might have written:

[snip: this is about a simple compiler of a small language, and Python
follows Perl re symantics instead of POSIX: a|ab always matches 'a' even
if 'ab' would match in the search string]

>This is quite annoying for me; while some solutions to this problem exists and they are shown in the Spark documentation, I have some background with lex/yacc and I would really like to use the "lex" semantics (longest match). Is there a package for Python that implements this behaviour?

AFAIK no, there is no such package.  However, you can do the following
things:

- reorder alternations (sp?) to be longest first

Substitute "ab|a" for "a|ab"

- the (?!...) operator might help

The re "if(?![a-z_0-9])" would match the 'if' and would ignore all
identifiers starting with 'if'.

HTH.
-- 
TZOTZIOY, I speak England very best,
Ils sont fous ces Redmontains! --Harddix


From FBatista at uniFON.com.ar  Wed Jan 28 14:44:41 2004
From: FBatista at uniFON.com.ar (Batista, Facundo)
Date: Wed, 28 Jan 2004 16:44:41 -0300
Subject: FRE: PEP 326 is D-E-A-D (was Re: How does compare work?)
Message-ID: <A128D751272CD411BC9200508BC2194D03383549@escpl.tcp.com.ar>

Aahz wrote:

#- >Even then, what about PEP 326, which presumes to define highest and
#- >lowest objects that can be compared with anything?
#- 
#- What about it?  ;-)
#- 
#- (Guido just posted a Pronouncement rejecting it.)

Can't find it at http://www.python.org/doc/essays/pepparade.html

I'm looking in the wrong place?

Thanks.

.	Facundo





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From i18n-nb-admin at lister.ping.uio.no  Mon Jan 26 19:35:09 2004
From: i18n-nb-admin at lister.ping.uio.no (i18n-nb-admin at lister.ping.uio.no)
Date: Tue, 27 Jan 2004 01:35:09 +0100
Subject: Your message to i18n-nb awaits moderator approval
Message-ID: <20040127003509.9901.40898.Mailman@cappuccino.ping.uio.no>

Your mail to 'i18n-nb' with the subject

    HELLO

Is being held until the list moderator can review it for approval.

The reason it is being held:

    Post by non-member to a members-only list

Either the message will get posted to the list, or you will receive
notification of the moderator's decision.



From newsgroups at jhrothjr.com  Tue Jan 20 11:31:46 2004
From: newsgroups at jhrothjr.com (John Roth)
Date: Tue, 20 Jan 2004 11:31:46 -0500
Subject: converting base class instance to derived class instance
References: <930ba99a.0401200413.5fae6fb9@posting.google.com>
Message-ID: <100qm0soklj3439@news.supernews.com>


"Sridhar R" <sridharinfinity at yahoo.com> wrote in message
news:930ba99a.0401200413.5fae6fb9 at posting.google.com...
> Consider the code below,
>
> class Base(object):
>   pass
>
> class Derived(object):
>
>   def __new__(cls, *args, **kwds):
>     # some_factory returns an instance of Base
>     # and I have to derive from this instance!
>     inst = some_factory() # this returns instance of Base
>     return inst  # Oops! this isn't an instance of Derived
>
>   def __init__(self):
>     # This won't be called as __new__ returns Base's instance
>     pass

__new__ can return an instance of any class it pleases.
It's not restricted to returning an instance of the class it
happens to be in, nor is it restricted to returning a newly
created instance, for that matter. It can do the entire
construction job without using the __init__ method.

However, I don't think that's the best solution. If
your factory is going to return instances of several
different classes, I think it's best that it be an explicit
factory method or function, not something that magically
happens in a class constructor. I'd rather not have to
deal with programs where class constructors pass me
instances of classes other than the one I'm calling.

If you want to do a little bit of deep magic, a factory
function can create an instance by calling object(),
plug in whatever attributes it wants and then change the
__class__ attribute to whatever class it wants before
it returns the newly minted instance. It doesn't have to
go near anything that resembles a constructor (other than
calling object() to get a new instance, of course.)

>   The constraint is there is some factory function that creates an
> instance of Base class.  So I _can't_ call "Base.__init__(self)" in
> Derived.__init__ func, as their will be _two_ instances (one created
> by Derived.__init__ and other created by the factory function)
>
>   Simply I want to get a derived class object, but instead of allowing
> _automatic_ creation of Base instance, I want to use _existing_ Base's
> instance, then use this as a Derived's instance.
>
>   Will metaclass solve this problem?

Wrong tool. Metaclasses are used to set up classes, not to
set up instances.

John Roth




From lbates at swamisoft.com  Thu Jan 29 11:19:47 2004
From: lbates at swamisoft.com (Larry Bates)
Date: Thu, 29 Jan 2004 10:19:47 -0600
Subject: Printing/updating output to the screen
References: <40192945$1@nntphost.cis.strath.ac.uk>
Message-ID: <pbqdnVUtSscDr4TdRVn_iw@comcast.com>

Daniel,

Here is an example progressbar class that
I use in my programs.

-Larry

class progressbarClass:
    def __init__(self, finalcount):
        import sys
        self.finalcount=finalcount
        self.blockcount=0
        self.block="*"
        self.f=sys.stdout
        #
        # If the final count is zero, don't start the progress gauge
        #
        if not self.finalcount : return
        self.f.write('\n------------------ %
Progress -------------------1\n')
        self.f.write('    1    2    3    4    5    6    7    8    9    0\n')
        self.f.write('----0----0----0----0----0----0----0----0----0----0\n')
        return

    def progress(self, count):
        if (count > self.finalcount): count=self.finalcount
        if (self.finalcount != 0) :
            percentcomplete=int(round(100*count/self.finalcount))

            if (percentcomplete < 1):
                percentcomplete=1
        else:
            percentcomplete=100

        blockcount=int(percentcomplete/2)
        if (blockcount > self.blockcount):
            for i in range(self.blockcount,blockcount):
                self.f.write(self.block)
                self.f.flush()

        if (percentcomplete == 100):
            self.f.write("\n")

        self.blockcount=blockcount
        return

if __name__ == "__main__":
    from time import sleep
    pb=progressbarClass(8)
    count=0
    while count<9:
        count+=1
        pb.progress(count)
        sleep(0.2)

    pb=progressbarClass(100)
    pb.progress(20)
    sleep(0.2)
    pb.progress(47)
    sleep(0.2)
    pb.progress(90)
    sleep(0.2)
    pb.progress(100)
    print "testing 1:"
    pb=progressbarClass(1)
    pb.progress(1)

"Daniel Pryde" <dpryde+usenet at cis.strath.ac.uk> wrote in message
news:40192945$1 at nntphost.cis.strath.ac.uk...
> Hi there. I hope this isn't a stupid question to ask, but does anyone
> know how to print out a string without moving to a new line each time
> and simply updating the first line. An example would be, if I wanted to
> have a percentage progress counter that was constantly updating. I'm
> unsure how to do this without printing to a brand new line. Any help
> would be greatly appreciated. Thanks.
>
> Daniel
>




From tim.one at comcast.net  Sun Jan 11 13:30:29 2004
From: tim.one at comcast.net (Tim Peters)
Date: Sun, 11 Jan 2004 13:30:29 -0500
Subject: pydoc patch for Subversion
In-Reply-To: <20040111090645.GA2398@omnifarious.org>
Message-ID: <LNBBLJKPBEHFEDALKOLCEENCIEAB.tim.one@comcast.net>

[Eric Mathew Hopper]
> I have a patch that allows pydoc to deal with Subversion
> (http://www.subversion.tigris.org) style version strings.

That's good, but please upload it to Python's patch manager:

    http://sf.net/tracker/?group_id=5470&atid=305470

Mailing lists, and Ping's inbox <wink>, are black holes for patches.



From dallasm at aiinet.com  Fri Jan 23 14:04:03 2004
From: dallasm at aiinet.com (Mahrt, Dallas)
Date: Fri, 23 Jan 2004 14:04:03 -0500
Subject: Sending Through ^] Through telnetlib
Message-ID: <AD59566A9D83864F871AE2E5250306400113480B@aimail.aiinet.priv>


> "John Abel" <john.abel at pa.press.net> wrote in message 
> news:mailman.687.1074866920.12720.python-> list at python.org...
> > 
> I have written a script that makes a 
> telnet connection, runs various
> > commands, and returns the output.  That was the easy bit :) 
>  However, to
> > close the session, I need to send ^] followed by quit.  I've tried
> > sending chr(29), which is the ascii equivalent, but that 
> doesn't seem to
> > work.  Is there something I'm missing?
> >
> > Any pointers would be much appreciated.
> >
> > Thanks
> >
> > J
> >
> 

FYI the telnetlib (as of 2.2.1, not sure past that) does not support all
telenet commands. If you want to send a special command, you need to access
the raw socket and send the extened options list character and the command
character. 

Ex: to send a Telnet BREAK

telnetCon.get_socket().send(chr(255)+chr(243))

So maybe trying  
telnetCon.get_socket().send(chr(255)+chr(29))

Will work fo you?

---
Dallas S. Mahrt> 



From danb_83 at yahoo.com  Sat Jan 31 04:01:41 2004
From: danb_83 at yahoo.com (Dan Bishop)
Date: 31 Jan 2004 01:01:41 -0800
Subject: PEP 327: Decimal Data Type
References: <mailman.1054.1075487007.12720.python-list@python.org>
	<bvef14$919$1@news.service.uci.edu>
Message-ID: <ad052e5c.0401310101.1c5bd5aa@posting.google.com>

Josiah Carlson <jcarlson at nospam.uci.edu> wrote in message news:<bvef14$919$1 at news.service.uci.edu>...
> > (In my dreams) I want to "float" to be decimal. Always. No more binary.

I disagree.

My reasons for this have to do with the real-life meaning of figures
with decimal points.  I can say that I have $1.80 in change on my
desk, and I can say that I am 1.80 meters tall.  But the two 1.80's
have fundamentally different meanings.

For money, it means that I have *exactly* $1.80.  This is because
"dollars" are just a notational convention for large numbers of cents.
 I can just as accuately say that have an (integer) 180 cents, and
indeed, that's exactly the way it would be stored in my financial
institution's database.  (I know because I used to work there.)  So
all you really need here is "int".  But I do agree with the idea of
having a class to hide the decimal/integer conversion from the user.

On the other hand, when I say that I am 1.80 m tall, it doesn't imply
that humans height comes in discrete packets of 0.01 m.  It means that
I'm *somewhere* between 1.795 and 1.805 m tall, depending on my
posture and the time of day, and "1.80" is just a convenient
approximation.  And it wouldn't be inaccurate to express my height as
0x1.CC (=1.796875) or (base 12) 1.97 (=1.7986111...) meters, because
these are within the tolerance of the measurement.  So number base
doesn't matter here.

But even if the number base of a measurement doesn't matter, precision
and speed of calculations often does.  And on digital computers,
non-binary arithmetic is inherently imprecise and slow.  Imprecise
because register bits are limited and decimal storage wastes them. 
(For example, representing the integer 999 999 999 requires 36 bits in
BCD but only 30 bits in binary.  Also, for floating point, only binary
allows the precision-gaining "hidden bit" trick.)  Slow because
decimal requires more complex hardware.  (For example, a BCD adder has
more than twice as many gates as a binary adder.)

> In my dreams, data is optimally represented in base e, and every number 
> is represented with a roughly equivalent amount of fudge-factor (except 
> for linear combinations of the powers of e).
> 
> Heh, thankfully my dreams haven't come to fuition.

Perhaps we'll have an efficient inplementation within the next
102.1120... years or so ;-)
 
> While decimal storage is useful for...money

Out of curiosity: Is there much demand for decimal floating point in
places that have fractionless currecy like Japanese Yen?

> Perhaps a generalized BaseN module is called for.  People 
> could then generate floating point numbers in any base (up to perhaps 
> base 36, [1-9a-z]).

If you're going to allow exact representation of multiples of 1/2,
1/3, 1/4, ..., 1/36, 1/49, 1/64, 1/81, 1/100, 1/121, 1/125, 1/128,
1/144, etc., I see no reason not to have exact representations of
*all* rational numbers.  Especially considering that rationals are
much easier to implement.  (See below.)

> ... Of course then you have the same problem with doing math on two 
> different bases as with doing math on rational numbers.

Actually, the problem is even worse.

Like rationals, BaseN numbers have the problem that there are multiple
representations for the same number (e.g., 1/2=6/12, and 0.1 (2) = 0.6
(12)).  But rationals at least have a standardized normalization.  We
agree can agree that 1/2 should be represented as 1/2 and not
-131/-262, but should BaseN('0.1', base=2) + BaseN('0.1', base=4) be
BaseN('0.11', 2) or BaseN('0.3', 4)?

The same potential problem exists with ints, but Python (and afaik,
everything else) avoids it by internally storing everything in binary
and not keeping track of its representation.  This is why "print 0x68"
produces the same output as "print 104".  BaseN would violate this
separation between numbers and their notation, and imho that would
create a lot more problems than it solves.

Including the problem that mixed-based arithmetic will require:
* approximating at least one of the numbers, in which case there's no
advantage over binary, or
* finding a "least common base", but what if that base is greater than
36 (or 62 if lowercase digits are distinguished from uppercase ones)?


From skip at pobox.com  Mon Jan  5 07:07:13 2004
From: skip at pobox.com (Skip Montanaro)
Date: Mon, 5 Jan 2004 06:07:13 -0600
Subject: Is it bug or feature in sre?
In-Reply-To: <Pine.LNX.4.58.0401051204090.6205@suzi.com.onego.ru>
References: <Pine.LNX.4.58.0401051204090.6205@suzi.com.onego.ru>
Message-ID: <16377.21361.749300.297850@montanaro.dyndns.org>


    >>> re.compile("(?P<gr>[A-Z]*)?")
    Roman> Traceback (most recent call last):
    ...
    Roman> sre_constants.error: nothing to repeat

    Roman> I wonder why I can't do this?

Is there some reason why

    "(?P<gr>[A-Z]*)"

or

    "(?P<gr>[A-Z]+)?"

isn't sufficient?  You specified the zero-or-more repetition inside the
group.  There's nothing else to have zero-or-one of.


    Roman> I guess it's of terrible style, but is this behaviour intentional
    Roman> or not?

I suspect it's intentional, since Fredrik went to the trouble of raising an
exception with a useful error message. <wink>

    Roman> Probably it is good idea to mention this in Python update path
    Roman> documents.  Otherwise some old programs will mysteriously fail.

What were you converting from, an older version of sre, pre, regex, or
(shudder) regexp?

Skip



From robin at jessikat.fsnet.co.uk  Mon Jan 12 04:18:26 2004
From: robin at jessikat.fsnet.co.uk (Robin Becker)
Date: Mon, 12 Jan 2004 09:18:26 +0000
Subject: Division oddity
References: <ssn3009029rrug3l8dk1pn06tqd019ucld@4ax.com>
	<7xeku5vrn8.fsf@ruckus.brouhaha.com>
Message-ID: <My1CLVAiZmAAFw5r@jessikat.fsnet.co.uk>

In article <7xeku5vrn8.fsf at ruckus.brouhaha.com>, Paul Rubin <http@?.cx>
writes
>Tim Rowe <tim at remove_if_not_spam.digitig.co.uk> writes:
>> If I do from __future__ import division then eval(1/2) gives me 0.5 as
>> expected. But if I do print input("enter a sum: ") and enter 1/2 as
>> the sum I get 0 as if I hadn't done the import.  I thought input was
>> supposed to give the same behaviour as an eval on raw input -- why the
>> difference here?
>
>The input function is calling eval from the context of the module
>where 'input' itself is defined.  If you use "from __future__ import
>division" in module A and have "print 3/2" in module B, the value of
>3/2 in module B shouldn't be affected by the input, since module B
>may depend on integer division having the old behavior.
>
>The result is a little bit surprising at first glance though, so it
>should probably be documented.
I get this in pythonwin with 2.3.2

PythonWin 2.3.2 (#49, Oct  2 2003, 20:02:00) [MSC v.1200 32 bit (Intel)]
on win32.
Portions Copyright 1994-2001 Mark Hammond (mhammond at skippinet.com.au) -
see 'Help/About PythonWin' for further copyright information.
>>> from __future__ import division
>>> eval('1/2')
0.5
>>> 

In python I get 


Python 2.3.2 (#49, Oct  2 2003, 20:02:00) [MSC v.1200 32 bit (Intel)] on
win32
Type "help", "copyright", "credits" or "license" for more information.
>>> from __future__ import division
>>> eval('1/2')
0.5
>>>

so  I guess pythonwin is broken in this respect.
-- 
Robin Becker


From exarkun at intarweb.us  Fri Jan  9 19:57:40 2004
From: exarkun at intarweb.us (Jp Calderone)
Date: Fri, 9 Jan 2004 19:57:40 -0500
Subject: Straw poll on Python performance (was Re: Python is far from a
	top performer ...)
In-Reply-To: <3FFF26A1.943DEA84@engcorp.com>
References: <ryELb.238$tK2.228@amstwist00>
	<3fff234a$0$129$e4fe514c@dreader3.news.xs4all.nl>
	<3FFF26A1.943DEA84@engcorp.com>
Message-ID: <20040110005740.GA4681@intarweb.us>

On Fri, Jan 09, 2004 at 05:09:37PM -0500, Peter Hansen wrote:
> Iwan van der Kleyn wrote:
> > 
> > In other words: it would be nice if Python on average would run faster
> > so the need for optimisation would lessen. 
> 
> I disagree with the above.  My opinion has long been that Python runs 
> adequately fast and that few people should need to spend much time on 
> optimization.  Maybe that sort of view should be put to the test.
> 
> This is my "straw poll" question:
> 
>   Do you spend a "significant" amount of time actually optimizing your 
>   Python applications?  (Significant is here defined as "more than five
>   percent of your time", which is for example two hours a week in a 
>   40-hour work week.)
> 

  No.

  Jp



From lubowiecka at go2.pl  Mon Jan 26 02:08:26 2004
From: lubowiecka at go2.pl (Sylwia)
Date: 25 Jan 2004 23:08:26 -0800
Subject: problems with registering PythonService.exe
Message-ID: <f6554b84.0401252308.5d07cd30@posting.google.com>

Hi!

I have the following problem :(
After registering the "PythonService.exe" executable...

C:\Python23\Lib\site-packages\win32>PythonService.exe -register

I got the following error message:
==============================================================================
"Registering the Python Service Manager...
Fatal Python error: PyThreadState_Get: no current thread

This application has requested the Runtime to terminate it in an unusual way.
Please contact the application's support team for more information."
==============================================================================
What may be wrong ?:(

I have win32all-157 installed on my computer...

I will be grateful for any hints. 
Thank you in advance,

Sylwia


From support at more-it.net  Wed Jan 28 16:30:47 2004
From: support at more-it.net (support at more-it.net)
Date: Wed, 28 Jan 2004 22:30:47 +0100
Subject: Virus Alert
Message-ID: <200401282130.i0SLUlS08708@securemail.more-it.net>

The mail message (file: data.pif) you sent to john at orion.de contains a virus. (on securemail.more-it.net)



From paradisejourney at hotmail.com  Thu Jan 15 01:01:54 2004
From: paradisejourney at hotmail.com (aj)
Date: 14 Jan 2004 22:01:54 -0800
Subject: best application framework for developing web application
Message-ID: <14ba0c0.0401142201.68faebcf@posting.google.com>

hi 
i am a newbi to python and developing a web application
what do u all think is the best application framework for developing
web application in python. I want a framework that supports
templates,database connectivity, is available for both unix and
windows ,and ofcourse is easy to learn.
Zope
Quixote
Draco or others


From maxk at NtOoSuPrAoM.edu  Fri Jan 16 04:00:40 2004
From: maxk at NtOoSuPrAoM.edu (Maxim Khesin)
Date: Fri, 16 Jan 2004 09:00:40 GMT
Subject: SimpleXMLRPCServer
Message-ID: <YKNNb.213874$0P1.42736@twister.nyc.rr.com>

Hi,
the typical usage of SimpleXMLRPCServer registers some
class with the server instance and then jumps into a
serve-forever loop, e.g.

server = SimpleXMLRPCServer(('', 8000))
server.register_instance(MyClass())
server.serve_forever()

is there a way to process actions other than XML-RPC
requests using SimpleXMLRPCServer? Is is possible to do
something like

server = SimpleXMLRPCServer(('', 8000))
server.register_instance(MyClass())
while(1)
 if(checkSomeCondidion()):
  server.serve_once()
 else: server.stop()

thanks,
max




From oliver.schoenborn at utoronto.ca  Wed Jan 21 13:31:01 2004
From: oliver.schoenborn at utoronto.ca (Humpty Dumpty)
Date: Wed, 21 Jan 2004 13:31:01 -0500
Subject: [Numpy-discussion] Status of Numeric
References: <CEELJPECNGEGKFNDLHFFGEBKCCAA.perry@stsci.edu>
	<mailman.533.1074574795.12720.python-list@python.org>
Message-ID: <bumghc$dsb$1@nrc-news.nrc.ca>


"Paul Dubois" <paul at pfdubois.com> wrote in message
news:mailman.533.1074574795.12720.python-list at python.org...
> Having two array classes around is a terrible idea. Once you have two
> popular array classes the entire world bifurcates. This plot package

I second that vehemently.

> I only suggested we do numarray because Numeric was, by general
> agreement, unmaintainable.  It was hard to work on and lacked the kind
> of robustness necessary to get permission to put it in the core. We all
> agreed Numeric would cease. Let's stick to the plan.

However, I think experience has shown that users tend to go for better
performance rather than better design.

So why couldn't Numeric be redesigned for maintainability, but keep the
algorithms that make it more performant than numarray?  Does the interface
need to change?

Oliver




From t-meyer at ihug.co.nz  Tue Jan 20 22:37:11 2004
From: t-meyer at ihug.co.nz (Tony Meyer)
Date: Wed, 21 Jan 2004 16:37:11 +1300
Subject: Installing SpamBayes
In-Reply-To: <1ED4ECF91CDED24C8D012BCF2B034F1304BA3C39@its-xchg4.massey.ac.nz>
Message-ID: <1ED4ECF91CDED24C8D012BCF2B034F130467785B@its-xchg4.massey.ac.nz>

[Josiah Carlson]
> If you are in windows and your associations are correct, 
> try: setup.py install

[Dog]
> That didnt work either and the file assoc. are correct.

In this sort of situation, it really helps to be more specific.  What
happened when you tried this?  Did you get an error message?  What was it?
How do you know that the file associations are correct?  Have you tried
executing other python files?  What version of Windows are you using?  Is
Python on your path?

=Tony Meyer




From skip at pobox.com  Wed Jan 28 11:05:07 2004
From: skip at pobox.com (Skip Montanaro)
Date: Wed, 28 Jan 2004 10:05:07 -0600
Subject: r prefix bug ... or my lack of understanding?
In-Reply-To: <bv8k84$8n2$1@ngspool-d02.news.aol.com>
References: <bv8gtj$5ob$1@ngspool-d02.news.aol.com>
	<mailman.913.1075301132.12720.python-list@python.org>
	<bv8k84$8n2$1@ngspool-d02.news.aol.com>
Message-ID: <16407.56755.65025.785344@montanaro.dyndns.org>


    Bill> Thanks I looked at faqs.org did not see it.

That's because the Python FAQ is not posted to this list/newsgroup.  It's
only available on the web.  I think faqs.org just culls FAQs from postings.

Skip



From donn at u.washington.edu  Wed Jan 14 12:34:07 2004
From: donn at u.washington.edu (Donn Cave)
Date: Wed, 14 Jan 2004 09:34:07 -0800
Subject: I come not to bury C++, but to praise it...
References: <mailman.337.1074032524.12720.python-list@python.org>
	<bu1uul$cam92$1@ID-46268.news.uni-berlin.de>
	<cu%Mb.47396$8H.99443@attbi_s03>
	<bu3khe$dbm5v$1@ID-46268.news.uni-berlin.de>
	<100aq779r2h2c9e@corp.supernews.com>
Message-ID: <donn-DF9867.09340714012004@nntp3.u.washington.edu>

In article <100aq779r2h2c9e at corp.supernews.com>,
 claird at lairds.com (Cameron Laird) wrote:

> In article <bu3khe$dbm5v$1 at ID-46268.news.uni-berlin.de>,
> Derek <none at none.com> wrote:
> 			.
> 			.
> 			.
> >I also use C++ and Python as my main languages and I agree with your
> >comments.  However, I don't agree that Python is inherently "safer"
> >than C++.  At best I see it as a tie.  For example, C++ let's you
> >corrupt memory among other "unsafe" things, most of which can be
> >avoided by using standard containers, smart pointers, etc.  Python
> >lets you do "unsafe" things such as passing an object to a function
> >when it makes no sense to do so, which can lead to nasty runtime
> >surprises.
> 
> We disagree on some matters.
> 
> I *do* regard Python as inherently safer than C++, and much more so.
> My aim for now is not to persuade you to my view, but only to make
> it explicit.  Memory management, and mismanagement, as mundane as it
> is, is so poorly applied in so much of the C++ code I see, that it
> swamps all other dimensions of comparison between the two languages.
> I quite agree with you that competent C++ programmers should exploit
> smart pointers and so on.  My experience is that, somehow, C++ as
> it's generally practiced appears to have barriers to their use.
> 
> I don't understand your last sentence, and, given my own focus on
> reliability, I very much want to understand it.  Are you alluding
> precisely to Python's dynamic typing, and observing that, as earlier
> is better, C++'s compile-type checks beat Python's run-time checks?

Your wording is precise enough that your question could have
been better.  Note "compile type checks" vs. "run-time checks" -
a difference not only in when, but what.  There's more to it
than "earlier is better".

   Donn Cave, donn at u.washington.edu


From michael at foord.net  Tue Jan  6 07:24:04 2004
From: michael at foord.net (Fuzzyman)
Date: 6 Jan 2004 04:24:04 -0800
Subject: YAPLP - Yet Another Python Links Page
Message-ID: <8089854e.0401060424.12465fcb@posting.google.com>

As part of a python project I've been working on ( atlantibots -
www.atlantibots.org.uk )I've collected Python and programming
links.... for what it's worth I thought I'd make them publicly
available....

http://www.voidspace.org.uk/coollinks/python_links.shtml

Fuzzyman


-- 

http://www.Voidspace.org.uk
The Place where headspace meets cyberspace. Online resource site -
covering science, technology, computing, cyberpunk, psychology,
spirituality, fiction and more.

---
http://www.atlantibots.org.uk
http://groups.yahoo.com/group/atlantis_talk/
Atlantibots - stomping across the worlds of Atlantis.
---
http://www.fuchsiashockz.co.uk  
http://groups.yahoo.com/group/void-shockz
---

Everyone has talent. What is rare is the courage to follow talent
to the dark place where it leads. -Erica Jong
Ambition is a poor excuse for not having sense enough to be lazy.
         -Milan Kundera


From http  Tue Jan 13 14:41:20 2004
From: http (Paul Rubin)
Date: 13 Jan 2004 11:41:20 -0800
Subject: Division oddity
References: <ssn3009029rrug3l8dk1pn06tqd019ucld@4ax.com>
	<7xeku5vrn8.fsf@ruckus.brouhaha.com>
	<cdm7005r12o3o3f6gngj8no1qh74ul3733@4ax.com>
	<400413E0.5C691A56@engcorp.com>
	<7xr7y3mzsl.fsf@ruckus.brouhaha.com>
	<400444A0.717BA7A3@engcorp.com>
Message-ID: <7xk73vzlen.fsf@ruckus.brouhaha.com>

Peter Hansen <peter at engcorp.com> writes:
> > Python has no support for macros or aliases, and it would be silly
> > to add some special kludge for input().  The user needs to be able
> > to redefine the function and so forth too.
> 
> Sure it does:
> 
> def input(*args):
>     return eval(raw_input(*args))

For it to be an alias, that definition would have to be injected into
the module that input is actually called from, not run in a separate
module.

How the heck does input get at the environment of its caller, anyway?
Through the frame object chain?  

I guess the obvious fix is for the future division flag to be part of
the environment, so evaling in the caller environment is done according
to the flag.  

Someone has already checked a fix into sourceforge, but I haven't
looked at it and don't know if it works that way or some other way.


From gandalf at geochemsource.com  Fri Jan 16 06:57:02 2004
From: gandalf at geochemsource.com (Gandalf)
Date: Fri, 16 Jan 2004 12:57:02 +0100
Subject: Python
Message-ID: <4007D18E.1040005@geochemsource.com>

Is there a public list where we can bless, praise and vaunt the most 
advanced state-of-the-art programming language of the world?

(Poetic question from a spirited Python believer)




From alexander.dejanovski at laposte.net  Wed Jan 21 05:53:45 2004
From: alexander.dejanovski at laposte.net (Alexander DEJANOVSKI)
Date: Wed, 21 Jan 2004 11:53:45 +0100
Subject: Retic SOAP tester 0.2 released
Message-ID: <5.1.0.14.2.20040121114749.02c426f8@127.0.0.1>

Just released Retic SOAP tester 0.2.

New features : SOAP messages exchanged are now pretty-printed and 
syntax-colored for better legibility.

Downloads : http://sourceforge.net/projects/retic/


================================================================================
Retic SOAP tester is a GUI tool written in Python (wxPython) that is 
capable of parsing WSDL files and
sending SOAP requests without any programming.

Retic SOAP tester comes into two distributions : win32 exe (thanks to 
py2exe) and Python src (wxPython 2.4
and PyXML 0.8.3 required).
================================================================================


Enjoy !!




From tzot at sil-tec.gr  Thu Jan  8 12:02:57 2004
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Thu, 08 Jan 2004 19:02:57 +0200
Subject: Bits from Numbers.
References: <3ffcb189$1@nntp0.pdx.net>
Message-ID: <g73rvvko1eq9n8tvpofmjj6f0i694t2vjs@4ax.com>

On Wed, 07 Jan 2004 16:36:43 -0800, rumours say that sdd
<daniels at dsl-only.net> might have written:

>I am whacking away at some code to view numbers as bit sequences.
>While this is not complete, I'd appreciate some feedback from anyone
>who is interested in looking at it:
>     http://members.dsl-only.net/~daniels/bits.html

Is it similar to BitDecoder which you can find at the Python Package
Index?

http://www.python.org/pypi?:action=display&name=BitDecoder&version=0.5.1

If yes, perhaps you should contact its author and then co-operate on it.
-- 
TZOTZIOY, I speak England very best,
Ils sont fous ces Redmontains! --Harddix


From jmdeschamps at cvm.qc.ca  Sat Jan  3 16:39:42 2004
From: jmdeschamps at cvm.qc.ca (jmdeschamps)
Date: 3 Jan 2004 13:39:42 -0800
Subject: SMTP - Topic & add files
References: <1073137983.983243@news.liwest.at>
Message-ID: <3d06fae9.0401031339.7a2dcdb5@posting.google.com>

"EsC" <christian.eslbauer at liwest.at> wrote in message news:<1073137983.983243 at news.liwest.at>...
> Hy!
> 
> probably a dummy question, but i don't
> know how to set a Topic-Text and add
> Files to an email ...
> 
> i use the SMTPLIB module and the
> function/method: .sendmail(from,to,msg)
> 
> but how can i set a topic Text?
> is there an other function/method, or
> must it be encoded within the message-text?
> 
> thanks for your help
> EsC

its in the msg parameter of sendmail such as :

yourSmtp = smtplib.SMTP('yourMailServer.org')

#envoi un message
#ARGUMENTS from sendMail
#from: your own client adress
#to: the intended recipient's adress
#msg: what will really show...in different fields
monSmtp.sendmail("From: ownMail at yourMailServer.org",
                       "To: recipientAdresse at hisServer.org",
                       "From:joe\r\nTo: Owner \nSubject: 3 weeks left"
                       + "\n\nTopic text of the  message! ")

on Windows, may differ slightly on Linux :)

Good messaging,

JM


From aaron at reportlab.com  Mon Jan 12 12:26:36 2004
From: aaron at reportlab.com (Aaron Watters)
Date: Mon, 12 Jan 2004 12:26:36 -0500
Subject: Databases: Which one's right for me?
References: <mailman.285.1073872919.12720.python-list@python.org>	
	<9a6d7d9d.0401120658.5b9ee522@posting.google.com>
	<1073924765.6341.387.camel@localhost.localdomain>
Message-ID: <4002D8CC.4060701@reportlab.com>

re: jeremy's reply...

I find the Gray and Reuter definition confusing.  To my mind isolation means
serializability and if you don't have serializability (at least as an 
option)
you don't have isolation.  Transactions don't have to be complex to 
cause serious
problems in read-committed mode:  the classic example is a debit of 
$1000 for
checking account 123 running at the same time as a credit for $4000 for 
checking
account 123.  If both transactions run at the same time and read the 
same previous
(committed) balance and they both complete but the first one completes last
then the customer is screwed to the tune of $4000.  This is only the 
simplist
problem -- for transactions involving complex data structures the 
problems can
be much more subtle than that (and more difficult to correct).

   -- Aaron Watters
===
in theory, theory is the same as practice.
in practice, it's more complicated than that.






From aahz at pythoncraft.com  Tue Jan 27 01:11:20 2004
From: aahz at pythoncraft.com (Aahz)
Date: 27 Jan 2004 01:11:20 -0500
Subject: Single and double asterisks preceding variables in function
	arguments
References: <bv3d4e$1h7$1@newshost.mot.com>
	<bv3gdg$ms0sn$1@ID-217427.news.uni-berlin.de>
Message-ID: <bv4ve8$qnt$1@panix2.panix.com>

In article <bv3gdg$ms0sn$1 at ID-217427.news.uni-berlin.de>,
anton muhin  <antonmuhin at rambler.ru> wrote:
>
>See item 7.5 in Language Reference. In short: * declaries list of 
>additional parameters, while ** declares map of additional parameters. 

Actually, ``*`` forces creation of a tuple:

>>> def foo(*bar):
...   print type(bar)
...
>>> l = [1,2,3]
>>> foo(*l)
<type 'tuple'>
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

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


From skip at pobox.com  Sat Jan 10 15:05:21 2004
From: skip at pobox.com (Skip Montanaro)
Date: Sat, 10 Jan 2004 14:05:21 -0600
Subject: Setting up test for XML-RPC
In-Reply-To: <KpYLb.8134$Ea4.5043@newssvr27.news.prodigy.com>
References: <cDPLb.2260$nl3.2178@newssvr29.news.prodigy.com>
	<aIPLb.2261$oo3.640@newssvr29.news.prodigy.com>
	<mailman.269.1073759787.12720.python-list@python.org>
	<KpYLb.8134$Ea4.5043@newssvr27.news.prodigy.com>
Message-ID: <16384.23297.521353.200475@montanaro.dyndns.org>


    >> You should be able to build a server and a client with just the
    >> standard Python distribution.

    MB> Really?  That would be awesome.  But I don't see how that
    MB> works... what do you enter for the URL?  (right now it is just
    MB> http://localhost, but obviously I would need to specify 20 different
    MB> machines for my system.  They are just bare Windows XP Pro machines
    MB> with a default installation.  They're "Windows Server" machines, I
    MB> don't think.

Doesn't matter.  Suppose you ran the server on win.foobar.tv, listening to
port 1234.  In the client you'd call ServerProxy like so:

    server = ServerProxy("http://win.foobar.tv:1234")
    print server.exanples.echo("My dog has fleas")

Skip



From http  Sat Jan  3 01:18:56 2004
From: http (Paul Rubin)
Date: 02 Jan 2004 22:18:56 -0800
Subject: Text-to-HTML processing program
References: <slrnbvcm32.122.philh@cabalamat.cabalamat.org>
Message-ID: <7xwu89pnan.fsf@ruckus.brouhaha.com>

philh at invalid.email.address (phil hunt) writes:
> Does anyone know of a text-to-HTML processing program, ideally
> written in Python because I'll probably be wanting to make small
> modifications to it, which is simple and straightforward to use
> and which uses a simple markup language (something like Wikipedia
> markup would be ideal)?

I really wish Wikipedia, BBCodes, and all that would just use regular
HTML instead of continually inventing new "simplified" markup codes
for users to remember.  The one thing they do that's useful is convert
blank lines to <p>.


From yshurik at fhb.kiev.ua  Sat Jan 17 05:51:00 2004
From: yshurik at fhb.kiev.ua (yshurik)
Date: Sat, 17 Jan 2004 12:51:00 +0200
Subject: PyQt forum
Message-ID: <bub3v4$dl0$2@news.lucky.net>

Hi all.

If you are working with PyQt 
the forum can be useful - http://www.thekompany.com/support/forum/index.php
(PyQt forum)
-- 
Best regards


From flemming at bjerke.dk  Wed Jan 28 23:41:19 2004
From: flemming at bjerke.dk (flemming at bjerke.dk)
Date: 29 Jan 2004 04:41:19 -0000
Subject: I have changed my e-mail address
Message-ID: <20040129044119.14293.qmail@dmerhverv.org>

Send mail til: flem[SLET DETTE]@bjerke.dk



Send mail to: flem[DELETE THIS]@bjerke.dk



I close flemming at bjerke.dk.



Flemming





From eric.brunel at N0SP4M.com  Thu Jan 29 09:43:09 2004
From: eric.brunel at N0SP4M.com (Eric Brunel)
Date: Thu, 29 Jan 2004 15:43:09 +0100
Subject: Rookie question about data types (hashtables)
References: <Xns947EF14E03FAEgeneralsteveperkins@130.133.1.4>
Message-ID: <bvb5ml$u4l$1@news-reader3.wanadoo.fr>

Steve D. Perkins wrote:
[snip]
>     	What I would LIKE to have is a hashtable-like structure that lets me 
> retrieve multiple values based on a partial key.

AFAIK, if you can do queries on a "hashtable-like structure" with a partial key, 
it cannot be a real hashtable...

 > I want to have a text
> field for the user to type in a Spanish word, and a box below containing 
> a list of English words.  With each character that the user types, I 
> would like to narrow down the words listed in the box below.  That is, 
> when you type the letter "a" the box will contain all English words 
> starting with the letter "a".  When you then type "n", the box will 
> narrow further and contain all words starting with "an", etc... until 
> you've narrowed it down to appropriate word.

I'd use a Python dictionary indexed not on words, but on letters in the word. 
So, for a dictionary translating english words into french, you'd have for example:

dictionary['m']['o']['n']['d']['a']['y']['translation'] = 'lundi'

(NB: having 'translation' as the last key is to solve the problem of words 
included in another; see 'sun' and 'sunday'. BTW, any key that is not a single 
character can be used...)

Here is an example implementation:

--------------------------------------------------------
def addWord(myDict, originalWord, translatedWord):
   d = myDict
   for c in originalWord:
     if not d.has_key(c): d[c] = {}
     d = d[c]
   d['translation'] = translatedWord

def _allTranslations(rootWord, d):
   res = []
   for c in d.keys():
     if c == 'translation':
       res.append((rootWord, d[c]))
     else:
       res += _allTranslations(rootWord + c, d[c])
   return res

def getTranslations(myDict, word):
   d = myDict
   for c in word:
     if not d.has_key(c): return []
     d = d[c]
   return _allTranslations(word, d)
--------------------------------------------------------

And then you'd do:

frenchDict = {}
## Week days
addWord(frenchDict, 'monday', 'lundi')
addWord(frenchDict, 'tuesday', 'mardi')
# ...
addWord(frenchDict, 'sunday', 'dimanche')
## Months
addWord(frenchDict, 'january', 'janvier')
addWord(frenchDict, 'february', 'fevrier')
# ...
addWord(frenchDict, 'december', 'decembre')

print getTranslations(frenchDict, 'wednesday')
print getTranslations(frenchDict, 'ju')
print getTranslations(frenchDict, 's')

I don't know how it scales up for big dictionaries, not to mention huge ones...

HTH
-- 
- Eric Brunel <eric dot brunel at pragmadev dot com> -
PragmaDev : Real Time Software Development Tools - http://www.pragmadev.com



From peter at engcorp.com  Tue Jan 20 11:47:11 2004
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 20 Jan 2004 11:47:11 -0500
Subject: I come not to bury C++, but to praise it...
References: <mailman.337.1074032524.12720.python-list@python.org><bu1uul$cam92$1@ID-46268.news.uni-berlin.de><cu%Mb.47396$8H.99443@attbi_s03><bu3khe$dbm5v$1@ID-46268.news.uni-berlin.de><20040114153516.GA16224@intarweb.us>
	<mailman.448.1074285657.12720.python-list@python.org>
	<bujkec$inl4t$1@ID-46268.news.uni-berlin.de>
Message-ID: <400D5B8F.8C597B9E@engcorp.com>

Derek wrote:
> 
> "Oren Tirosh" wrote:
> > A traceback is also much less nasty than deciphering a
> > 1000-character long compiler error message reported in
> > code that uses a heavily templated library.
> 
> Absolutely correct.  But remember that ugly template-related compiler
> error messages are a reflection of current compiler technology, not a
> fundamental limitation of C++.  I suspect future compilers will make
> debugging templates much easier.

I believe I heard that claim, almost verbatim, sometime around the last time 
I was actively using C++, which was about a decade ago...

-Peter


From ecocozza at hotmail.com  Tue Jan 20 10:44:25 2004
From: ecocozza at hotmail.com (eric cocozza)
Date: Tue, 20 Jan 2004 10:44:25 -0500
Subject: Python work needed... please respond privatly
Message-ID: <Sea2-F30VTdAMDmZ5fg0000afbc@hotmail.com>

Hi,

I just moved a python program to a new server, and I'm getting path errors. 
It relys on the pear library and a image processing one.

Please respond with cost based on 1/hr of work, and please accept paypal, or 
other simple form of payment.

Thanks!

-Eric





From mir4uu at yahoo.com  Sat Jan  3 11:26:52 2004
From: mir4uu at yahoo.com (mir nazim)
Date: 3 Jan 2004 08:26:52 -0800
Subject: Python for Embedded Devices?
References: <efa6f675.0401021920.3bffced0@posting.google.com>
Message-ID: <425cc8d1.0401030826.59a9d4ca@posting.google.com>

brandon6684 at yahoo.com (Brandon) wrote in message news:<efa6f675.0401021920.3bffced0 at posting.google.com>...
> Java seems to have taken off as the platform and language of choice
> for many embedded devices. Would it be feasible for Python(perhaps
> running on an embedded version of Linux) to act in such a capacity.
> Most of my experience with Python has been with Unix-type scripting
> tasks and using it when it is an applications built in scripting, but
> I know some people try to use to build larger complex applications. Is
> the Python interpreter portable and good enough to be used in resource
> constrained devices like cell phones?

Why only embeded devices? 
It should possible to create complete J2EE like platform for python
for creating complex applications. [ i m no expert. lokking for a
simple discussion.]


From adonisv at REMOVETHISearthlink.net  Sun Jan 11 13:49:58 2004
From: adonisv at REMOVETHISearthlink.net (Adonis)
Date: Sun, 11 Jan 2004 18:49:58 GMT
Subject: Moving widgets in Tkinter
Message-ID: <qVgMb.3119$q4.2242@newsread3.news.atl.earthlink.net>

I wish to manually move widgets in Tkinter, now I have successfully done it,
but with odd results, I would like to move the widgets with a much smoother
manner, and better precision.

Any help is greatly appreciated.

--

here is snip of working code:

from Tkinter import *

class blah:

    def MoveWindow(self, event):
        self.root.update_idletasks()
        self.f.place_configure(x=event.x_root, y=event.y_root-20)

    def __init__(self):
        self.root = Tk()
        self.root.title("...")
        self.root.resizable(0,0)
        self.root.geometry("%dx%d%+d%+d"%(640, 480, 0, 0))

        self.f = Frame(self.root, bd=1, relief=SUNKEN)
        self.f.place(x=0, y=0, width=200, height=200)

        self.l = Label(self.f, bd=1, relief=RAISED, text="Test")
        self.l.pack(fill=X, padx=1, pady=1)

        self.l.bind('<B1-Motion>', self.MoveWindow)
        self.f.bind('<B1-Motion>', self.MoveWindow)

        self.root.mainloop()

x = blah()




From max at alcyone.com  Mon Jan 19 14:54:20 2004
From: max at alcyone.com (Erik Max Francis)
Date: Mon, 19 Jan 2004 11:54:20 -0800
Subject: Delayed evaluation and setdefault()
References: <buh6j1$bub$1@news.tudelft.nl>
Message-ID: <400C35EC.AF2DFADD@alcyone.com>

Leo Breebaart wrote:

> So I guess my question is twofold: one, do people think
> differently, and if so why?; and two: is there any elegant (or
> other) way in which I can achieve the delayed evaluation I desire
> for setdefault, given a side-effect-having b()?

The setdefault method of dictionaries is just a normal method in Python;
only the builtin `and' and `or' operators have special short-circuiting
behavior.  That is to say, there are no builtin functions or methods in
Python which are "special forms."

It's true that the kind of thing you want to do (lazy evaluation in some
incidental context) is common, but it would not be a good idea to start
selectively adding special forms to the language since it would greatly
complicate things.  Right now if I see

	this.that(something, theOther())

I can immediately tell what gets evaluated or called and when.  I don't
need to know that there are special cases in some things that look like
method/function calls but actually might be special forms, and that's a
good thing.

As for your particular solution, you're much better off implementing the
lazy evaluation you want yourself, rather than wishing there were
special language support for it for that particular method (or a very
small subset of methods/functions).

-- 
 __ Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
/  \ San Jose, CA, USA && 37 20 N 121 53 W && &tSftDotIotE
\__/ The critical period in matrimony is breakfast-time.
    -- A.P. Herbert


From Pieter.Claerhout at Creo.com  Wed Jan 28 04:44:11 2004
From: Pieter.Claerhout at Creo.com (Pieter Claerhout)
Date: Wed, 28 Jan 2004 10:44:11 +0100
Subject: Cross-version extension modules?
Message-ID: <490316A24CC5D411ACD700B0D078F7F003915E29@cseexch01.cse.creoscitex.com>

Peter,

extension modules in Python are always linked to a specific version of
Python. You might perform some tricks with writing a pure Python module
about your extension that, based on the version of the python interpreter,
loads a different version of your extension. This is e.g. the way the Python
drivers for SapDB work.

You can download them from:
http://www.sapdb.org/7.4/sap_db_downloads.htm

Cheers,


pieter

Creo
pieter claerhout | product support prinergy | tel: +32 2 352 2511 |
pieter.claerhout at creo.com | www.creo.com

IMAGINE CREATE BELIEVE(tm)


-----Original Message-----
From: Peter Astrand [mailto:peter at cendio.se] 
Sent: 28 January 2004 10:40
To: python-list at python.org
Subject: Cross-version extension modules?



If I build a extension module with Python 2.2 and then loads it with 2.3, 
I get:

RuntimeWarning: Python C API version mismatch for module _foo: This
Python has API version 1012, module _foo has version 1011.

How fatal is this? Is it safe to use the module anyway? If not, is it
possible to build the module differently, so that it actually is safe to
use it with different versions of Python?

-- 
Peter ?strand		www.thinlinc.com
Cendio			www.cendio.se
Teknikringen 3		Phone: +46-13-21 46 00
583 30 Link?ping




-- 
http://mail.python.org/mailman/listinfo/python-list



From jjl at pobox.com  Tue Jan  6 11:28:34 2004
From: jjl at pobox.com (John J. Lee)
Date: 06 Jan 2004 16:28:34 +0000
Subject: Why does this fail?
References: <vvhdlm72386b3c@corp.supernews.com>
Message-ID: <878yklavnx.fsf@pobox.com>

"Dave Murray" <dlmurray at micro-net.com> writes:

> New to Python question, why does this fail?
[...]
> def Checkit(URL):
[...]

(already answered six times, so I won't bother...)

You might want to have a look at the unittest module.

Also (advert ;-), if you're doing any kind of web scraping in Python
(including functional testing), you might want to look at this little
FAQ (though it certainly doesn't nearly cover everything relevant):

http://wwwsearch.sf.net/bits/clientx.html

BTW, in response to another question in this thread (IIRC), and
entirely contrary to my previous assertion here <wink>, it appears
that HTMLParser.HTMLParser is a bit more finicky with HTML than is
sgmllib/htmllib (htmllib is a thin wrapper over sgmllib).  I hope to
investigate and fix that -- HTMLParser.HTMLParser knows about XHTML,
so in that respect is a better choice than sgmllib/htmllib.  If you
want to process junk HTML, though (or perhaps even valid HTML that the
library you're using doesn't like), look at mxTidy or uTidylib.  I
should link to those on my FAQ page...


John


From theller at python.net  Sat Jan 10 16:13:40 2004
From: theller at python.net (Thomas Heller)
Date: Sat, 10 Jan 2004 22:13:40 +0100
Subject: scanning c-code
References: <btj4oo$g58$1@piggy.rz.tu-ilmenau.de>
Message-ID: <4qv35wxn.fsf@python.net>

"tm" <js.bach at web.de> writes:

> Hello,
>
> I have to to scan c-code, look for a c-struct variable(declaration) and
> represent the struct in a tree-graphic.
> Are there modules for scanning c-code and graphictools for the
> representation stuff.
> What would you advise as a starting point...

Simon Burton's cdecl.py:
<http://arrowtheory.com/software/python/index.html>

Thomas


From bkelley at wi.mit.edu  Thu Jan 15 15:27:24 2004
From: bkelley at wi.mit.edu (Brian Kelley)
Date: Thu, 15 Jan 2004 15:27:24 -0500
Subject: Why gmp is not in the standard library?
In-Reply-To: <mailman.400.1074182344.12720.python-list@python.org>
References: <4f0a9fdb.0401150211.615a7f45@posting.google.com>	<m3hdyxv1mp.fsf@pc150.maths.bris.ac.uk>	<4006b54e$0$560$b45e6eb0@senator-bedfellow.mit.edu>
	<mailman.400.1074182344.12720.python-list@python.org>
Message-ID: <4006f74a$0$567$b45e6eb0@senator-bedfellow.mit.edu>

Skip Montanaro wrote:
> Bdb's license is not GPL:
> 
>     http://www.sleepycat.com/download/oslicense.html

I stand corrected, it makes perfect sense that the Berkeley DB should be 
released using the Berkeley license :)  I don't know why I thought 
otherwise.

That being said, wasn't there some issue with making the Python License 
GPL compatible for issues like these?

> Skip
> 



From Z_kline at hotmail.com  Mon Jan 19 08:00:03 2004
From: Z_kline at hotmail.com (Zachary)
Date: Mon, 19 Jan 2004 05:00:03 -0800
Subject: overwrite private method... (of wxColumnSorterMixin class)
References: <bugj2p$vqj$1@nebula.dnttm.ro>
Message-ID: <bugkcm$gtquu$1@ID-221199.news.uni-berlin.de>


"Florian Preknya" <bolo at coco.ro> wrote in message
news:bugj2p$vqj$1 at nebula.dnttm.ro...
> Is there a posibility to overwrite a private method (one that starts with
> __ ) ? I read that they are just formely private, they are prefixed with
the
> class name to have an obtured visibility, so maybe it's a trick here...
>
> More details...
> I use wxPython, more specifically the wxColumnSorterMixin class. I want to
> overwrite the __OnColClick event handler to behave on my way: I want the
> sorting feature will affect only some columns, not all columns and that
> event handler is the key. The problem is that the event chain is skiped in
> the __OnColClick method, so I cannot receive the event anymore. So, my
idea
> was to overwrite the __OnColClick method in the mixin subclass. Is this
> possible? Or, are they other solutions for this ?
>
> Thanks,
> Florian.
>
>
What you read is true, so far as I know.  It is possible to override them,
as Python doesn't have a notion of encapsulation, again, as far as I know.
You can probably get away with this.




From davecook at nowhere.net  Mon Jan 26 10:04:51 2004
From: davecook at nowhere.net (David M. Cook)
Date: Mon, 26 Jan 2004 15:04:51 GMT
Subject: Guardian: open source is a throwback says Jack Schofield
References: <64cff82f.0401251143.328388bd@posting.google.com>
	<mailman.772.1075066543.12720.python-list@python.org>
	<bv1jkf$g46$1@namru.matavnet.hu>
	<bv1pgj$ctl$3@news.service.uci.edu>
Message-ID: <slrnc1ab4j.3kh.davecook@localhost.localdomain>

In article <bv1pgj$ctl$3 at news.service.uci.edu>, Josiah Carlson wrote:

> Speaking of which...
> http://www.whitehouse.gov/news/releases/2004/01/20040122-5.html

I'm still flabbergasted that this is on whitehouse.gov and not on
whitehouse.org.

Dave Cook



From jcarlson at nospam.uci.edu  Fri Jan 30 22:23:13 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Fri, 30 Jan 2004 19:23:13 -0800
Subject: PEP 327: Decimal Data Type
In-Reply-To: <401B1A87.639CD971@easystreet.com>
References: <mailman.1036.1075467073.12720.python-list@python.org>
	<6ltk10h30riel0lghd18t5unjco2g26spi@4ax.com>
	<401B1A87.639CD971@easystreet.com>
Message-ID: <bvf776$ue$1@news.service.uci.edu>

> If python adds decimal data, it probably ought to be consistent with C
> and C++.  Otherwise, the C and C++ guys will have a dreadful time
> writing emulation code to run on computers built to support python.

Now that's a "Python will take over the world" statement if I ever heard 
one.  But seriously, processor manufacturers build processors and 
compilers for Fortran, C, and C++.  If a manufacturer starts paying 
attention to where Python is going (for things other than scripting 
their build-process), I'm sure Guido would like to know.

  - Josiah


From graham at rockcons.co.uk  Sun Jan  4 14:27:03 2004
From: graham at rockcons.co.uk (Graham Nicholls)
Date: Sun, 04 Jan 2004 19:27:03 +0000
Subject: Launching pdb from within a script
References: <UNYJb.14065$Od5.5161@news-binary.blueyonder.co.uk>
	<bt9mhl$9k2$06$1@news.t-online.com>
	<MHZJb.14962$Od5.2841@news-binary.blueyonder.co.uk>
Message-ID: <bOZJb.15107$Od5.11731@news-binary.blueyonder.co.uk>

Graham Nicholls wrote:

> Peter Otten wrote:
> 
>> Graham Nicholls wrote:
>> 
>>> A year or so ago, I was given a really useful answer to a question posed
>>> here, which showed me how to start the debugger from withing a script.
>> 
>> Are you looking for pdb.set_trace()?
>> 
>> Peter
> I think so, thanks!
> Graham
Or maybe not.
I'm sure I was able to print the value of variables like this:

 except : 
        pdb.set_trace()

run the program:
        error message
        (Pdb) d <return> (not sure why!)
        (Pdb) print dentry.path
        (Pdb) more debugging here

But pdb complains that there are no such variables.  It may be that I had to
add some incantation around the script startup - I just can't remember (and
its frustrating!).

Thanks
Graham
-- 
#include <wit>


From jdhunter at ace.bsd.uchicago.edu  Sat Jan  3 11:17:13 2004
From: jdhunter at ace.bsd.uchicago.edu (John Hunter)
Date: Sat, 03 Jan 2004 10:17:13 -0600
Subject: Graph in wxPython
In-Reply-To: <bt6gln$3mevo$1@ID-130333.news.uni-berlin.de> ("Cousin
	Stanley"'s message of "Sat, 3 Jan 2004 06:40:17 -0700")
References: <bt04a4$2e3$1@news.Stanford.EDU>
	<mailman.42.1073113928.12720.python-list@python.org>
	<bt6gln$3mevo$1@ID-130333.news.uni-berlin.de>
Message-ID: <m21xqhc8hi.fsf@mother.paradise.lost>

>>>>> "Cousin" == Cousin Stanley <CousinStanley at hotmail.com> writes:

    Cousin> John ....  Perhaps I can add another verse to that song
    Cousin> I've been writing called The
    Cousin> GTK/PyGtk/wGlade/Wx/MatPlotLib Blues ....

    Cousin>   You know a couple of verses already .... :-)

    >>>>  import matplotlib
    >>>> 
    >>>> matplotlib.use( 'WX' )
    Cousin> unrecognized backend WX.  Use one of PS, GD, GTK, Template

Looks like you're using an older version of matplotlib.  The WX
backend is a fairly recent addition.  Make sure you are using 0.40.

Hope this helps,
JDH




From hawkfish at trustedmedianetworks.com  Mon Jan 12 13:14:27 2004
From: hawkfish at trustedmedianetworks.com (Richard Wesley)
Date: 12 Jan 2004 13:14:27 EST
Subject: Standalone ZPT and Batch
Message-ID: <hawkfish-D782E9.10141412012004@spectator.sj.sys.us.xo.net>

I am busy converting a single Zope page to a Python cgi using the 
standalone ZPT implementation from sourceforge.  Most of it seems to 
work just fine, but I am finding that although the Batch object is 
available and ported(?), it does not seem to work.  

Whenever I try to access batch/next/first with a short list, the 
renderer complains that next.first is not defined.   The ZPT codes looks 
like this

...
batch python:modules['ZUtils'].Batch(...);
next batch/next
...

<a tal:condition="next" tal:attributes="...next/first..."...>

Looking at Batch.py, it appears that Batch.next is actually a 
LazyNextBatch object, which only defines the Zope-specific __of__ 
operator.  This makes sense, but I am rather surprised that standalone 
ZTP does not handle this correctly in Expressions.py

Anyone have any suggestions about how to fix this?

TIA,

-- 

- rmgw

<http://www.trustedmedianetworks.com/>

----------------------------------------------------------------------------
Richard Wesley                                  Trusted Media Networks, Inc.

"There's nothing intellectual about wandering around Italy
 in a big shirt, trying to get laid." 
    - Rowan Atkinson, "Black Adder:Ink and Incapability"


From ketulp_baroda at yahoo.com  Sat Jan 10 06:44:21 2004
From: ketulp_baroda at yahoo.com (ketulp_baroda)
Date: Sat, 10 Jan 2004 11:44:21 -0000
Subject: What is best for web application development??
Message-ID: <btooil+det2@eGroups.com>

i am developing a web application and i am really confused on what 
should i use.
should i use just python and use the cgi module availabe.
Or should i use application like WebWare.Also there is PSP available.
I am really confused and need help




From runed at stud.cs.uit.no  Wed Jan 28 14:03:45 2004
From: runed at stud.cs.uit.no (Rune)
Date: 28 Jan 2004 11:03:45 -0800
Subject: How to detect that a key is being pressed,
	not HAS been pressed earlier!??
Message-ID: <6ed33425.0401281103.61987e72@posting.google.com>

Hey

I'm trying to build a gui application and need to know if the user is
actually holding down the shift or ctrl key. That is, if the user
currently is holding down the shift key. In pseudo code this will boil
down to something like this:

def test:
  if user presses shift:
    return SHIFT_IS_PRESSED
  elif user presses ctrl:
    return CTRL_IS_PRESSED
  else
    return false

It's important to notice here that I'm not interested if the user has
already pressed shift or ctrl. I'm only interested in knowing if he is
currently holding down one of these keys. (I have looked into msvcrt
and the like but have found no answer..) The function should also work
in both windows and Linux.

Any help is appriciated :)


From netquest at sympatico.ca  Tue Jan 27 03:19:24 2004
From: netquest at sympatico.ca (KNS)
Date: Tue, 27 Jan 2004 00:19:24 -0800
Subject: winapi: mouseclick
In-Reply-To: <xheRb.3760$mf4.463197@news20.bellglobal.com>
References: <xheRb.3760$mf4.463197@news20.bellglobal.com>
Message-ID: <atmRb.45843$Kg6.323222@news20.bellglobal.com>


Just to add some clarification, this is in fact a Python question.
I'm just working within the Windows environment.  And, now that
I'm here, I'm certain this is child's play for many of you, so
a bit of help would be most welcomed.

Thanks.

KNS wrote:
> 
> Hello,
> 
> Can someone please suggest how to test for a mouse click using
> the WinAPI?  I have dispatched a windows application and would
> like to detect any mouseclicks (and keyboard entry for that matter)...
> 
> Thanks.
> 



From Pieter.Claerhout at Creo.com  Thu Jan 22 05:52:15 2004
From: Pieter.Claerhout at Creo.com (Pieter Claerhout)
Date: Thu, 22 Jan 2004 11:52:15 +0100
Subject: Importing database: newbie issue
Message-ID: <490316A24CC5D411ACD700B0D078F7F003915DDD@cseexch01.cse.creoscitex.com>

I would read in the file line by line and then extract the parts I need,
provided the database file is a text file. A small example:

### CODE SAMPLE
f = open( 'MyDatabaseFile', 'r' )
data = f.readlines()
f.close()

for record in data:
	field1 = record[32:32+12]
	field2 = record[50:50+8]
### END

Hope this answers your question.

cheers,


pieter

Creo
pieter claerhout | product support prinergy | tel: +32 2 352 2511 |
pieter.claerhout at creo.com | www.creo.com

IMAGINE CREATE BELIEVE(tm)


-----Original Message-----
From: Angelo Secchi [mailto:secchi at sssup.it] 
Sent: 22 January 2004 11:55
To: python-list at python.org
Subject: Importing database: newbie issue


Hi,
I have a database with a fixed format structure (i.e. i know the
starting point and the length of each of the field composing the
database) and I would like to extract from it only few fields (ex the
one starting from the 32nd position with length 12...).
What is the best way to do that?

Thank
a

-- 
http://mail.python.org/mailman/listinfo/python-list



From skip at pobox.com  Wed Jan 28 10:34:20 2004
From: skip at pobox.com (Skip Montanaro)
Date: Wed, 28 Jan 2004 09:34:20 -0600
Subject: I support PEP 326
In-Reply-To: <bv8jli$ddk$1@news.service.uci.edu>
References: <698f09f8.0401272000.79704ef0@posting.google.com>
	<mailman.654.1074788734.12720.python-list@python.org>
	<698f09f8.0401271318.21c9ca72@posting.google.com>
	<bv6ph8$181$1@news.service.uci.edu>
	<20040128041023.2EB9225B353@bonanza.off.ekorp.com>
	<20040128090205.GA3086@nl.linux.org>
	<mailman.915.1075301602.12720.python-list@python.org>
	<bv8jli$ddk$1@news.service.uci.edu>
Message-ID: <16407.54908.798846.778336@montanaro.dyndns.org>


    Josiah> I know you commented on the flat namespace of __builtin__, but
    Josiah> I've not seen any comments on PEP 326.  

http://mail.python.org/pipermail/python-dev/2004-January/042308.html

I guess I don't sort() stuff enough...

Skip



From tim.one at comcast.net  Mon Jan 19 12:05:27 2004
From: tim.one at comcast.net (Tim Peters)
Date: Mon, 19 Jan 2004 12:05:27 -0500
Subject: secure unpickle?
In-Reply-To: <871xpwxe5g.fsf@pobox.com>
Message-ID: <LNBBLJKPBEHFEDALKOLCIECKIHAB.tim.one@comcast.net>

[Gandalf]
> ...
>> I'm using this module (based on the documentation you mentioned):
>> ...

[John J. Lee]
> What does this have to do with the question?  He was worried about
> security of pickle, not asking how to call dumps() and loads().

Look at Gandalf's code again.  The pickler is unremarkable, but the
unpickler contains the assignment:

    p.find_global = None

As his loads docstring said, "this function will not unpickle globals and
instances" as a result.




From __peter__ at web.de  Wed Jan 28 17:14:07 2004
From: __peter__ at web.de (Peter Otten)
Date: Wed, 28 Jan 2004 23:14:07 +0100
Subject: Nested lists or conditional logic?
References: <ead93a6.0401280956.41fd4193@posting.google.com>
	<bv91r9$eub$03$1@news.t-online.com>
Message-ID: <bv9c2m$57a$06$1@news.t-online.com>

Here's another odd one:

from itertools import islice

ITEMSINBATCH = 3;
ARBITRARYNUM = 11;

sample = ["item #%d" % i for i in range(ARBITRARYNUM)]

def batches(s, n):
    it = iter(s)
    n -= 1
    def batch(next):
        yield next
        for item in islice(it, n):
            yield item
    while True:
        yield batch(it.next())

for batch in batches(sample, ITEMSINBATCH):
    for item in batch:
        print item
    print "summary"

The client code is as clean as you can get...

Peter



From vincent at visualtrans.de  Sun Jan  4 10:08:43 2004
From: vincent at visualtrans.de (vincent wehren)
Date: Sun, 4 Jan 2004 16:08:43 +0100
Subject: importing
References: <231bc96c.0401031249.12cff6d7@posting.google.com>
	<bt9a52$nug$1@news4.tilbu1.nb.home.nl>
Message-ID: <bt9iul$ud1$1@news2.tilbu1.nb.home.nl>


"vincent wehren" <vincent at visualtrans.de> schrieb im Newsbeitrag
news:bt9a52$nug$1 at news4.tilbu1.nb.home.nl...
| "Boomer" <boomer4467 at yahoo.com> schrieb im Newsbeitrag
| news:231bc96c.0401031249.12cff6d7 at posting.google.com...
| | Hi all,
| |     I'm new to python which explains my problems with this. I'm trying
| | to import a .csv file(from excel) into some fields on my company's
| | software system(which interfaces to an sql database. Each row in this
| | .csv file needs to be split into smaller strings and each respective
| | string applied to it's field in the software then it's saved and the
| | next row starts, here's the code I've come up with so far.
| |
| | f=open ("book1.csv", "r")
| | s=f.readline ()
| | while s != "":
| |   print s
| |   l = s.split(s,",",(11))
| |   PlayIt.SetFieldContent ("SY012M1", "art-nr", l[0])
| |   PlayIt.PlayContent ("{CSB SY012M1|art-nr}{Enter}")
| |   PlayIt.SetFieldContent ("SY012ADM1", "001bez",  l[1])
| |   PlayIt.SetFieldContent ("SY012ADM1", "005agr",  l[2])
| |   PlayIt.SetFieldContent ("SY012ADM1", "006agr",  l[3])
| |   PlayIt.SetFieldContent ("SY012ADM1", "009kst",  l[4])
| |   PlayIt.SetFieldContent ("SY012EHM1", "005laeh",  l[5])
| |   PlayIt.SetFieldContent ("SY012EHM1", "006lauf",   l[6])
| |   PlayIt.SetFieldContent ("SY012EHM1", "011vkuf",   l[7])
| |   PlayIt.SetFieldContent ("SY012SDM1", "012fest",   l[8])
| |   PlayIt.SetFieldContent ("SY012PRM1", "001tpr",   l[9])
| |   PlayIt.SetFieldContent ("SY012PRM1", "002wpr",   l[10])
| |   PlayIt.SetFieldContent ("SY012PRM1", "003plpr",   l[11])
| |   PlayIt.PlayContent ("{CSB SY012M1|art-nr}{F2}")
| |   s=f.readline ()
| | f.close ()
| |
| | here's the error
| |
| | Traceback (innermost last):
| |   File "<string>", line 5, in ?
| | AttributeError: 'string' object has no attribute 'split'
| |
| | the furthest I get is when I remove the s.split all together then I
| | can actually watch it import the first field correctly and switch
| | focus to the second field where it prints a comma and then hangs and
| | eventually gives the
| | argument 3: expected string list found
| | Someone told me I need to import the string module using "import
| | string" somewhere in my code, but when I do this I get an error
| | stating that no such module exists. I run this as script inside a
| | macro from another program and I believe the version of python this
| | program uses is 2.2.1.
|
| Hi "Boomer"
|
| if you are using version V3.91 or lower of your companies software, the
| embedded Python will still be at 1.52. If it is V4.20 it'll be Python
2.2.2.
| Since I know that the Python standard library is not shipped with the
| software you are referring to, you need to either install Python (in the
| version corresponding to your version) on your local machine, or an
| accessible share and set your environment properly.
|
| Looking at your example I am pretty confident that your are using V391
which
| embedds 1.52. As a quick fix: check if either "string.pyc" or "string.py"
| lives in your w32 directory or - if you are executing via

Just for the record, I mean the w32 directory of the ERP system you are
referring to!

Vincent Wehren




a .pli file - in
| the directory "playit.exe" lives in. If that is not the case, get either
| module in the correct version and copy it to the directories just
described.
| This will fix your problem (until you try to import another module
| ofcourse).
|
| HTH
|
| Vincent Wehren
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
| | Does anyone have any ideas? Any help would be wonderful!!!
|
|




From andrew-pythonlist at puzzling.org  Wed Jan 21 05:52:15 2004
From: andrew-pythonlist at puzzling.org (Andrew Bennetts)
Date: Wed, 21 Jan 2004 21:52:15 +1100
Subject: twistedmatrix.com - time out error
In-Reply-To: <pan.2004.01.21.10.42.52.628395@phreaker.net>
References: <pan.2004.01.21.10.42.52.628395@phreaker.net>
Message-ID: <20040121105215.GA6651@frobozz>

On Wed, Jan 21, 2004 at 11:42:52AM +0100, Nuff Said wrote:
> I am trying to download Twisted form www.twistedmatrix.com since
> maybe 2 days, but I always get a time out error from the server.

Yeah, there's some sort of hardware fault with the server, apparently.

> Is there a mirror resp. another 'official' download site for Twisted?
> (Or: does someone know what's going on with twistedmatrix.com?)

http://twisted.sf.net/ should have the most recent releases (including
documentation).

You ought to be able to use Google's cache to read the website, if you're
desperate to read the marketing material ;)

-Andrew.




From engsolnom at ipns.com  Thu Jan  1 13:54:43 2004
From: engsolnom at ipns.com (engsolnom at ipns.com)
Date: Thu, 01 Jan 2004 10:54:43 -0800
Subject: Where to go from here? newbee
References: <bt0asa02hj8@enews1.newsguy.com>
	<1koon5kaqkghf.211m8yj2j32t$.dlg@40tude.net>
	<bt1fe3030pf@enews1.newsguy.com>
Message-ID: <q6q8vvovotemt15plbufh971ptm90hns0h@4ax.com>

Richard,

Being a newbie to Python myself, I can relate.

One way...assuming windows
Click on the python command line thing you evidently found. This gives you a dos box showing the
Python prompt...>>>
Just type Python commands: print "Hello World", for example
Control Z to exit

Another way....
Bring up a 'real' dos box, cd to Python23, or whatever your install named it, and enter python
This again shows the Python prompt >>>

>From the dos prompt, you can run a Python script by entering:
python myscript.py
where myscript is a text file with an extension of py, and located in the C:\python23 dir.

If you make a sub-directory myfiles (adviable) under C:\python23, to hold your test scripts, you
need to enter:
python myfiles\myscript.py

A third way...
Use a text editor to manage files and directories, and which may be able to launch dos commands.
There are dozens of editors out there, some good, some not so good. I use PFE, and have for years.

Hope this helps a bit.

Norm

On Thu, 1 Jan 2004 09:45:00 -0600, "Richard" <anonymous at 127.000> wrote:

> Jules Dubois wrote:
>
> > On Wed, 31 Dec 2003 23:22:43 -0600, in article
> > <news:bt0asa02hj8 at enews1.newsguy.com>, Richard wrote:
>
> >> Just downloaded python for the fun of it.
> >> What do I run to begin coding with?
> >> Version 2.3.3
>
> > Yes, unless you have some reason to use an older release.
>
> >> When I run the "command line" thing, I get a dos window.
> >> Now what?
>
> > Type some commands and see how the interpreter works.
>
> > Go to http://www.cs.unm.edu/~ej and click on these links.
>
> >   Python Hacking I (Just do it!)
> >   Python Hacking II (types, functions, exceptions)
> >   Python Hacking III
>
> > Type the commands and see what happens.
>
> > Go to http://www.python.org/ and find some more advanced tutorials.
>
>Ok. Now I'm slowly understanding. I guess you could say that python is
>similar to visual basic and c++ in coding.
>I have a program written in python which has several "py" files included.
>How do I view these for the coding examples?
>



From wrbt at email.com  Thu Jan 29 16:26:48 2004
From: wrbt at email.com (Larry)
Date: 29 Jan 2004 13:26:48 -0800
Subject: Color count in PIL
References: <2ec1bc1c.0401271443.15f56742@posting.google.com>
Message-ID: <2ec1bc1c.0401291326.5602aee2@posting.google.com>

wrbt at email.com (Larry) wrote in message news:<2ec1bc1c.0401271443.15f56742 at posting.google.com>...
> I've been walking up, down, and around instances in the object model
> of PIL trying to figure out how to easily calculate how many unique
> colors are used in an image, specifically a bitmap (mode "P"). Am I
> missing something?
> 
> Thanks python friends!

So far I have: colors=len(sets.Set(list(im.getdata())))

That makes me want to throw up.


From venkataraju at nospam2me.sbcglobal.net  Tue Jan 20 16:22:05 2004
From: venkataraju at nospam2me.sbcglobal.net (Venkat Venkataraju)
Date: Tue, 20 Jan 2004 21:22:05 GMT
Subject: Python T-shirt
In-Reply-To: <mailman.551.1074621419.12720.python-list@python.org>
References: <mailman.551.1074621419.12720.python-list@python.org>
Message-ID: <1_gPb.32556$P%1.25715272@newssvr28.news.prodigy.com>

> The code on the back of it was written by a very cool guy.. I don't 
> remember who. Thanks, anyways! :)

I lookup and it is written by Fredrik Lundh (fredrik_lundh_at_ivab.se)

Venkat



From daniels at dsl-only.net  Tue Jan  6 13:50:10 2004
From: daniels at dsl-only.net (sdd)
Date: Tue, 06 Jan 2004 10:50:10 -0800
Subject: metadocumentation (keyword help)
In-Reply-To: <mailman.144.1073405082.12720.python-list@python.org>
References: <tyfn091gnk5.fsf@pcepsft001.cern.ch>
	<mailman.144.1073405082.12720.python-list@python.org>
Message-ID: <3ffb0edf$1@nntp0.pdx.net>

Jp Calderone wrote:

> On Tue, Jan 06, 2004 at 03:27:06PM +0100, Jacek Generowicz wrote:
> 
>>Where can I find concise, clear documentation[*] describing what one has
>>to do in order to enable Python's internal help to be able to provide
>>descriptions of Python keywords ?
> 
> 
>   "Quote them"
> 
>   help('if')
> 
>   Jp
> 
> 
Or simply use help()
and interactively enter lines.


From capitanmutanda at hotmail.com  Thu Jan 29 03:57:14 2004
From: capitanmutanda at hotmail.com (Capitan Mutanda)
Date: 29 Jan 2004 00:57:14 -0800
Subject: browsing IIS Metabase?
Message-ID: <e5f9f063.0401290057.3fd81ff5@posting.google.com>

Hello!

I'm studing Python and would like to do some learning on the job. I have
the need to read and write IIS Metabase, but could not find any examples.

Anybody can suggets a metabase browser?

TIA

/CM


From jeremy+plusnews at jeremysanders.net  Fri Jan 23 07:58:21 2004
From: jeremy+plusnews at jeremysanders.net (Jeremy Sanders)
Date: Fri, 23 Jan 2004 12:58:21 +0000
Subject: Psyco distutils problem
Message-ID: <pan.2004.01.23.12.58.19.351197@jeremysanders.net>

Hi -

I'm trying to build a Psyco rpm on Fedora 1. I try the command

xpc5:~/psyco-1.1.1> python setup.py bdist_rpm

this fails with:

...
copying dist/psyco-1.1.1.tar.gz -> build/bdist.linux-i686/rpm/SOURCES
building RPMs
rpmbuild -ba --define _topdir /home/jss/psyco-1.1.1/build/bdist.linux-i686/rpm --clean build/bdist.linux-i686/rpm/SPECS/psyco.spec
error: File /home/jss/psyco-1.1.1/build/bdist.linux-i686/rpm/psyco/psyco-1.1.1.tar.gz: No such file or directory
error: command 'rpmbuild' failed with exit status 1

If I then copy the missing file it fails with

...
+ unset DISPLAY
+ env 'CFLAGS=-O2 -g -pipe -march=i386 -mcpu=i686' python setup.py build
Traceback (most recent call last):
  File "setup.py", line 83, in ?
    execfile(os.path.join(SOURCEDIR, 'files.py'), data)
IOError: [Errno 2] No such file or directory: 'c/files.py'
error: Bad exit status from /home/jss/psyco-1.1.1/build/bdist.linux-i686/rpm/tmp/rpm-tmp.23601 (%build)


RPM build errors:
    Bad exit status from /home/jss/psyco-1.1.1/build/bdist.linux-i686/rpm/tmp/rpm-tmp.23601 (%build)
error: command 'rpmbuild' failed with exit status 1

So it looks like some files aren't being copied. I'm a distutils newbie,
so can someone suggest whether this is a Psyco problem, a Fedora problem,
an RPM problem or what?

Just doing setup.py bdist does actually work.

Thanks

Jeremy



From michael at telcopartners.com  Sat Jan 24 15:53:27 2004
From: michael at telcopartners.com (Michael Spencer)
Date: Sat, 24 Jan 2004 12:53:27 -0800
Subject: Various strings to dates.
References: <4GfQb.16187$AA6.14368@fed1read03>
	<MFgQb.95539$6y6.1915432@bgtnsc05-news.ops.worldnet.att.net>
	<PRgQb.16209$AA6.9881@fed1read03> <n7iQb.16224$AA6.5862@fed1read03>
Message-ID: <JJqdncVrnLmjRo_dRVn-vw@comcast.com>

[Fixed top-posts: please add future comments at the bottom]
> >
> > >
> > > Amy G wrote:
> > > > I have seen something about this beofore on this forum, but my
google
> > search
> > > > didn't come up with the answer I am looking for.
> > > >
> > > > I have a list of tuples.  Each tuple is in the following format:
> > > >
> > > > ("data", "moredata", "evenmoredata", "date string")
> > > >
> > > > The date string is my concern.  This is the date stamp from an
email.
> > > > The problem is that I have a whole bunch of variations when it comes
> to
> > the
> > > > format that the date string is in.  For example I could have the
> > following
> > > > two tuples:
> > > >
> > > > ("data", "moredata", "evenmoredata", "Fri, 23 Jan 2004 00:06:15")
> > > > ("data", "moredata", "evenmoredata", "Thursday, 22 January 2004
> > 03:15:06")
> > > >
> > > > I know there is some way to use the date string from each of these
to
> > get a
> > > > date usable by python, but I cannot figure it out.
> > > > I was trying to use time.strptime but have been unsuccesful thus
far.
> > > >
> > > > Any help is appreciated.
> > > >
> > "wes weston" <wweston at att.net> wrote in message
> > news:MFgQb.95539$6y6.1915432 at bgtnsc05-news.ops.worldnet.att.net...
> > > Amy,
> > >     I hope there is a better way but, if you go here:
> > >
> > > http://www.python.org/doc/current/lib/datetime-date.html
> > >
> > > The new datetime module may help. This and the time mod
> > > should get you where you want to go.
> > >
> > > list     = strdate.split(", ")
> > > daystr   = list[0]
> > > daynum   = int(list[1])
> > > monthstr = list[2]
> > > year     = int(list[3])
> > > #funct to get a month int is needed
> > >
> > > d = datetime.Date(y,m,d)
> > >
> > > wes
> > >
> > > ---------------------------------------
> > > >
> > >
> "Amy G" <amy-g-art at cox.net> wrote in message
> news:PRgQb.16209$AA6.9881 at fed1read03...
> > No it won't.  Unfortunatly I don't necessarily have a comma delimited
date
> > string.  Thanks for the input though.
> >
> > The following three date strings is another example of the various date
> > formats I will encounter here.
> >
> > Thursday, 22 January 2004 03:15:06
> > Thursday, January 22, 2004, 03:15:06
> > 2004, Thursday, 22 January 03:15:06
> >
> > All of these are essentially the same date... just in various formats.
I
> > would like to parse through them and get a comparable format so that I
can
> > display them in chronological order.
> >
> >
>
>
"Amy G" <amy-g-art at cox.net> wrote in message
news:n7iQb.16224$AA6.5862 at fed1read03...
> Okay.  I fixed the problem somewhat.  I moved the dateutil directory over
to
> /usr/local/lib/python2.2/site-packages and I can now import dateutil.  But
a
> call like this:
>
> from dateutil.parser import parse
>
> results in this error:
>
> ImportError: cannot import name parse
>
> I can 'from dateutil.parser import *' but cannot use parse after that.
> I can also 'from dateutil import parser' but that doesn't help either.
>
> Sorry for my inexperience here.  Thanks for all of the help already.
>

Amy:

The docstring of the dateutil package:
"""
Copyright (c) 2003  Gustavo Niemeyer <niemeyer at conectiva.com>

This module offers extensions to the standard python 2.3+
datetime module.
"""
__author__ = "Gustavo Niemeyer <niemeyer at conectiva.com>"
__license__ = "PSF License"

notes that it requires the datetime module (new in Python 2.3).  It appears
that you are using 2.2.  Can you install 2.3.3?

If you need to stick with 2.2, the question of using datetime in 2.2 was
answered in
http://groups.google.com/groups?q=python+2.2+datetime&hl=en&lr=&ie=UTF-8&selm=mailman.1043334342.25146.python-list%40python.org&rnum=2
with a pointer to a "workalike" module, see:
http://cvs.zope.org/Zope3/src/datetime/

I have not tested whether this works with dateutil

Cheers

Michael





From owner-mutt-users at mutt.org  Mon Jan 26 23:00:41 2004
From: owner-mutt-users at mutt.org (owner-mutt-users at mutt.org)
Date: 27 Jan 2004 04:00:41 -0000
Subject: mutt-users@mutt.org: Non-member submission from
	python-list@python.org
Message-ID: <20040127040041.15623.qmail@agent57.gbnet.net>



Your submission to the list has been forwarded to the list
owner <owner-mutt-users at mutt.org> for approval because you do not seem to be on 
that list.

If you want to join the list, send email to <Majordomo at mutt.org>, with
"subscribe mutt-users" in the message text (not the subject).




From rune.froysa at usit.uio.no  Fri Jan  9 07:18:39 2004
From: rune.froysa at usit.uio.no (Rune Froysa)
Date: 09 Jan 2004 13:18:39 +0100
Subject: Unicode and exception strings
Message-ID: <svl1xq98gdc.fsf@dresden.uio.no>

Assuming an exception like:

  x = ValueError(u'\xf8')

AFAIK the common way to get a string representation of the exception
as a message is to simply cast it to a string: str(x).  This will
result in an "UnicodeError: ASCII encoding error: ordinal not in
range(128)".

The common way to fix this is with something like
u'\xf8'.encode("ascii", 'replace').  However I can't find any way to
tell ValueErrors __str__ method which encoding to use.

Is it possible to solve this without using sys.setdefaultencoding()
from sitecustomize?

Regards,
Rune Fr?ysa


From NAIGIMSESRIMAIL at gims.com  Tue Jan 27 05:19:27 2004
From: NAIGIMSESRIMAIL at gims.com (GroupShield for Exchange (ESRIMAIL))
Date: Tue, 27 Jan 2004 12:19:27 +0200
Subject: ALERT -  GroupShield ticket number OA1430_1075198765_ESRIMAIL_3 w
	as generated
Message-ID: <B06B8FEF47ACD7119E720040F428459101F64E9F@ESRIMAIL>

Action Taken:
The attachment was quarantined from the message and replaced with a text
file informing the recipient of the action taken.

To:
python-list at python.org <python-list at python.org>

From:
Michael G. A. Sung <aisung at bubblemotions.com>

Sent:
-1897042688,29615427

Subject:
PAP connection

Attachment Details:-

Attachment Name: ATT09057.txt
File: ATT09057.txt
Infected? No
Repaired? No
Blocked? Yes
Deleted? No
Virus Name: 



	
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From a at a.invalid  Thu Jan  8 13:34:38 2004
From: a at a.invalid (Timo Virkkala)
Date: Thu, 08 Jan 2004 20:34:38 +0200
Subject: Cheetah - Test suite failures
Message-ID: <btk7rt$7tq$1@nyytiset.pp.htv.fi>

I tried to install Cheetah (0.9.15) and ran into trouble. When running 
the test suite, I get 61 failures and 57 errors. Most of the errors are
"ImportError: No module named temp", with some "TypeError: update() 
takes exactly one argument (0 given)".

The full output of the test suite is at
(URL: http://www.cs.helsinki.fi/u/tjvirkka/out.txt )

I'd hate to spend hours debugging this thing, so I thought to ask here 
if someone has any ideas what's causing this..

--
Timo Virkkala


From bkelley at wi.mit.edu  Tue Jan  6 09:56:48 2004
From: bkelley at wi.mit.edu (Brian Kelley)
Date: Tue, 06 Jan 2004 09:56:48 -0500
Subject: Test if IDLE is a mature program
In-Reply-To: <na4Jb.15580$lo3.7942@newsread2.news.pas.earthlink.net>
References: <ppKdnTEKUp3Hr2-iRVn-jg@comcast.com><7ti4vvoburp4k4o4a0v5p4shae7o5uhotb@4ax.com><edqdnVxBL_Q3fG-iRVn-gg@comcast.com><99dce321.0312311130.5b7c7c8a@posting.google.com><N6OdndTvJqSstW6iRVn-gg@comcast.com><3ff49f0e.776954150@news.blueyonder.co.uk>
	<mailman.18.1072997292.12720.python-list@python.org>
	<na4Jb.15580$lo3.7942@newsread2.news.pas.earthlink.net>
Message-ID: <3ffacc43$0$572$b45e6eb0@senator-bedfellow.mit.edu>

Andrew Dalke wrote:
> 
> Or tried to save to a file named "prn" or "aux" under MS Windows  ;)

Or even worse, "aux.jar" or "aux.py".  Talk about headaches.

>                     Andrew
>                     dalke at dalkescientific.com
> 
> 



From martin at v.loewis.de  Fri Jan  2 06:36:51 2004
From: martin at v.loewis.de (Martin v. Loewis)
Date: Fri, 02 Jan 2004 12:36:51 +0100
Subject: Python 2.3.3 compilation problem
In-Reply-To: <fba51ba7.0401012310.599d626d@posting.google.com>
References: <fba51ba7.0401012310.599d626d@posting.google.com>
Message-ID: <3FF557D3.50500@v.loewis.de>

Zdenda wrote:

> Compiling /usr/local/lib/python2.3/xml/sax/handler.py ...
> Compiling /usr/local/lib/python2.3/xml/sax/saxutils.py ...
> Compiling /usr/local/lib/python2.3/xml/sax/xmlreader.py ...
> Compiling /usr/local/lib/python2.3/xmllib.py ...
> Compiling /usr/local/lib/python2.3/xmlrpclib.py ...
> Compiling /usr/local/lib/python2.3/zipfile.py ...
> make: *** [libinstall] Error 1
> 
> Have somebody any idea where is error?

It's an error further up in the output, probably caused
by some erroneous file in /usr/local/lib/python2.3.

Regards,
Martin



From francisgavila at yahoo.com  Sat Jan 10 11:06:08 2004
From: francisgavila at yahoo.com (Francis Avila)
Date: Sat, 10 Jan 2004 11:06:08 -0500
Subject: Writing Files
References: <AJULb.1380$q4.460@newsread3.news.atl.earthlink.net>
Message-ID: <10008pk9gov3c78@corp.supernews.com>

Lucas Raab wrote in message ...
>What is the best way to go about writing to files?? Whenever I insert a
>statement to write results to a file there's nothing in it. Any
>suggestions??


Don't forget to close and/or flush your file....
-- 
Francis Avila


From mi-mal at o2.pl  Mon Jan 12 05:32:54 2004
From: mi-mal at o2.pl (Mimal)
Date: Mon, 12 Jan 2004 11:32:54 +0100
Subject: CGI module problem: duplicated output
In-Reply-To: <jvtMb.409$L97.222@news.get2net.dk>
References: <mailman.219.1073658628.12720.python-list@python.org>	<9smuvv0ou8qpilg9vlpgpqt45apalmur49@4ax.com>	<mailman.288.1073895526.12720.python-list@python.org>
	<jvtMb.409$L97.222@news.get2net.dk>
Message-ID: <bttt36$hn6$1@sea.gmane.org>

> How about renaming it to mimal_cgi.py!

For a second I thought: "That's it!" Unfortunately, that doesn't seem to 
  help. I renamed the file and I got the same. :-(

-- 
Mimal






From jdhunter at ace.bsd.uchicago.edu  Sat Jan  3 02:03:18 2004
From: jdhunter at ace.bsd.uchicago.edu (John Hunter)
Date: Sat, 03 Jan 2004 01:03:18 -0600
Subject: Graph in wxPython
In-Reply-To: <bt04a4$2e3$1@news.Stanford.EDU> ("Oh Kyu Yoon"'s message of
	"Wed, 31 Dec 2003 19:31:15 -0800")
References: <bt04a4$2e3$1@news.Stanford.EDU>
Message-ID: <m2smixfr9l.fsf@mother.paradise.lost>

>>>>> "Oh" == Oh Kyu Yoon <okyoon at stanford.edu> writes:

    Oh> Does anyone know how to implement plots from scipy, chaco, etc
    Oh> into wxPython widget?

matplotlib has a wxpython plotting backend, which supports interactive
data exploration and hardcopy save to a variety of output formats --
http://matplotlib.sourceforge.net

Here's a sample script:

  import matplotlib
  matplotlib.use('WX')
  from matplotlib import plot, show
  plot([1,2,3])
  show()

You can use matplotlib interactively from the python shell, in batch
python scripts, or embed it in wxpython application window.  Or you
can use it offline w/o a GUI environment to make hardcopy plots in
PNG, PS or other formats.

See the example examples/embedding_in_wx.py for demo code showing how
to embed matplotlib figures into wx apps.

matplotlib also supports GTK, PS and GD.

biasedly-yours,
JDH



From adalke at mindspring.com  Fri Jan 16 02:53:04 2004
From: adalke at mindspring.com (Andrew Dalke)
Date: Fri, 16 Jan 2004 07:53:04 GMT
Subject: C++ bad-mouthing (was: Why learn Python ??)
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<878yka2sze.fsf@pobox.com> <100bbekd61fbl53@corp.supernews.com>
	<Xns94711F202CED8JanC@213.119.4.35>
	<100d4ljnic3l465@corp.supernews.com>
	<Xns94723DEFEB830JanC@213.119.4.35>
Message-ID: <ALMNb.11700$1e.231@newsread2.news.pas.earthlink.net>

JanC:
> But Netscape was largely based on Mosaic anyway; being developed by the
> same developers.  The beta I was talking about above still has a Mosaic
> logo.  ;-)

While it had many of the same developers, as I recall, none of the code was
shared.  They were planning to call it Netscape Mosaic but that was
changed before the final release.  Also, and again pulling out some old
memory here, Netscape paid UIUC a chunk of money just in case there
was some accidental copyright transfer because of not doing a pure
clean-room reimplementation.  I think that was mentioned in the IPO
prospectus... but I'm not going to try and dig it up now.

                    Andrew
                    dalke at dalkescientific.com





From godoy at ieee.org  Thu Jan 15 15:23:26 2004
From: godoy at ieee.org (Jorge Godoy)
Date: Thu, 15 Jan 2004 18:23:26 -0200
Subject: wxwindows question
References: <mailman.402.1074182599.12720.python-list@python.org>
Message-ID: <ue9jd1-jb4.ln1@wintermute.g2ctech>

On Thursday 15 January 2004 11:29 Jason Tesser wrote in
<mailman.402.1074182599.12720.python-list at python.org>:

> Have you developed many apps that run on both Linux and Windows??

I don't know how many is 'many', but *I*, alone, have written 17
programs with it in the last 6 months. From concept programs (that
might evolve into something else) to business systems. A partner of
mine has written almost half of it in the same period while also
learning Python... 

Of those apps I've written 6 rely heavily on database (PostgreSQL) and
there are 3 that are in use everyday by lots of people in two
different companies. 

As I said in another message, all development and debugging done by me
is done on a Linux box and these companies run both Windows and Linux
(being, for now, Windows the most used). 


I'm still learning a lot being my last lessons on printing (two months
ago) and graphics (I'm only needing it now, so I'm studying it while
doing lots of other things). Printing was the hardest thing I had to
do up to now, but people from the wxPython mailing list help a lot
and the documentation, besides not being the best thing that exists,
is also very useful and direct to the point. 


wxWindows, the base of wxPython, is also free and is being adopted by
companies such as Borland, what might make the quality improve a lot
and make things more efficient. Developers of wxWindows and wxPython
are very fast and responsive.


Be seeing you,
-- 
Godoy.     <godoy at ieee.org>


From CousinStanley at hotmail.com  Sat Jan  3 16:18:25 2004
From: CousinStanley at hotmail.com (Cousin Stanley)
Date: Sat, 3 Jan 2004 14:18:25 -0700
Subject: Graph in wxPython
References: <bt04a4$2e3$1@news.Stanford.EDU><mailman.42.1073113928.12720.python-list@python.org><bt6gln$3mevo$1@ID-130333.news.uni-berlin.de>
	<mailman.50.1073147163.12720.python-list@python.org>
Message-ID: <bt7bgm$3v2da$1@ID-130333.news.uni-berlin.de>

| Looks like you're using an older version of matplotlib.  
| 
| The WX backend is a fairly recent addition.  
|
| Make sure you are using 0.40

John .... 

  I've got MatPlotLib 0.30 installed here on 2003-10-21 .... 

  I'll look for 0.40 ....

  Thanks for the update ....

-- 
Cousin Stanley
Human Being
Phoenix, Arizona



From jepler at unpythonic.net  Tue Jan 20 19:57:49 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Tue, 20 Jan 2004 18:57:49 -0600
Subject: Pyrex without Python (was Re: calling Pyrex results from C)
Message-ID: <20040121005749.GA27424@unpythonic.net>

Perhaps I should take the advice given elsewhere to ask on a pyrex
mailing list, but I thought I'd try here first.

As I mentioned in another thread a few weeks ago, a current hobby is
writing code for small embedded processors, where "small" means 1k-4k
instructions and 128-1k bytes data.  C is a fine language for this as long
as you don't use FP arithmetic or much of the standard library.

I wish I could write my code in Pyrex, of course keeping to 'int8_t'
and 'int16_t' as only basic data types, but it inevitably makes Python
API calls.

How close to impossible would it be to make Pyrex emit Python-free code
if there are only 'cdefs'?  Are there any obvious gotchas in
Pyrex-generated code if 'int' is a 16-bit datatype?  Is there some
reason that large stack frames and/or calls to malloc() would be
unavoidable in Pyrex?

Jeff



From skip at pobox.com  Sat Jan 24 14:09:47 2004
From: skip at pobox.com (Skip Montanaro)
Date: Sat, 24 Jan 2004 13:09:47 -0600
Subject: utf8 encoding problem
In-Reply-To: <buta7q$vtv$06$1@news.t-online.com>
References: <20040122103549.GA5620@wiggy.net>
	<Pine.LNX.4.44L.0401221640010.31484-100000@ods.pravda.rfn.ru>
	<mailman.643.1074780990.12720.python-list@python.org>
	<buta7q$vtv$06$1@news.t-online.com>
Message-ID: <16402.49915.534545.987590@montanaro.dyndns.org>


    >> Luckily that is not true, otherwise it would be completely impossible
    >> to have websites using non-ascii input. To be specific, the encoding
    >> used for HTML forms is determined by: [algorithm omitted]

    Martin> As Denis explains, it is true. See 17.13.4

Sorry, but I'm coming to this discussion late.  See "17.13.4" of what
document? 

Thx,

Skip



From claird at lairds.com  Tue Jan 13 12:49:33 2004
From: claird at lairds.com (Cameron Laird)
Date: Tue, 13 Jan 2004 17:49:33 -0000
Subject: C++ bad-mouthing (was: Why learn Python ??)
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<7xeku496wx.fsf@ruckus.brouhaha.com>
	<donn-9D2291.16343412012004@nntp6.u.washington.edu>
	<40041576.D070723E@engcorp.com>
Message-ID: <1008btdlo4li1b1@corp.supernews.com>

In article <40041576.D070723E at engcorp.com>,
Peter Hansen  <peter at engcorp.com> wrote:
>Donn Cave wrote:
>> 
>> Python has the advantage of a clean start, but
>> from a software engineering standpoint it really seems like a
>> hacker language.  
>
>Ohh.... nice controversial statement. :-)
>
>I would strongly disagree with the above statement for a number
>of reasons, including (random thoughts):
>
> - packages
> - interactive interpreter
> - no static typing
> - high productivity
> - ease of testing
> - flexibility
> - extremely broad library support
> - low learning curve
>
>and probably a dozen others.  I think this has all been discussed before,
>though, so I won't belabour the point.  Basically, as a software engineer
>(nominally a "Systems Design Engineer") I find Python to be hands down 
>*the* best language I've encountered for use in serious work.  I can't
>actually think of another which excels on so many fronts.
			.
			.
			.
>From a Python standpoint, "software engineering" has made a
nice start, but it needs to catch up with hacker insights.
-- 

Cameron Laird <claird at phaseit.net>
Business:  http://www.Phaseit.net


From ericjnilsen at earthlink.net  Tue Jan  6 14:52:54 2004
From: ericjnilsen at earthlink.net (EricN)
Date: 6 Jan 2004 11:52:54 -0800
Subject: help needed with class and method confusion
References: <20040106102232.19889.00002028@mb-m01.aol.com>
Message-ID: <afbb8061.0401061152.676a0810@posting.google.com>

Here's one way to do it (undoubtedly there are other ways as well). 
Sorry, I couldn't loop the moons.  Probably a programmer more clever
than I could write a factory pattern for it.

class Moon:
    def __init__(self, name, diameter = 0.0, planet = "unknown"):
        self.NAME = name
        self.DIAMETER = diameter
        self.HOMEPLANET = planet

    def setMoonName(self, name):
        self.NAME = str(name)

    def getMoonName(self):
        return self.NAME

    def setMoonDiameter(self, diam):
        self.DIAMETER = float(diam)

    def getMoonDiameter(self):
        return self.DIAMETER

    def setMoonHomePlanet(self, planet):
        self.HOMEPLANET = str(planet)

    def getMoonHomePlanet(self):
        return self.HOMEPLANET


if __name__ == "__main__":
    moons = []
    Io = Moon("Io", 1.0, "Jupiter")
    moons.append(Io)
    Europa = Moon("Europa", 2.0, "Jupiter")
    moons.append(Europa)
    Ganymeade = Moon("Ganymeade", 3.0, "Jupiter")
    moons.append(Ganymeade)
    Titan = Moon("Titan", 3.0, "Saturn")
    moons.append(Titan)
    
    for x in range(len(moons)):
        print moons[x].getMoonName()
        print moons[x].getMoonDiameter()
        print moons[x].getMoonHomePlanet()
        print


From http  Thu Jan 15 04:12:07 2004
From: http (Paul Rubin)
Date: 15 Jan 2004 01:12:07 -0800
Subject: Safe prime numbers in Python
References: <200401140639.i0E6dxt09128@mail001.syd.optusnet.com.au>
	<mailman.349.1074082578.12720.python-list@python.org>
Message-ID: <7xad4pbmoo.fsf@ruckus.brouhaha.com>

Skip Montanaro <skip at pobox.com> writes:
>     def safe_primes(last=1):
>         while True:
>             next = gmpy.next_prime(last)
>             if gmpy.is_prime((next-1)/2):
>                 yield next
>             last = next
> 
> Seems to work fairly well.

This doesn't generate a random prime, since the choice of primes by
next_primes is not uniform.  

A simple, reasonably fast way to generate these primes randomly is

Generate random r, where r==3 (mod 4), i.e. r = 4n+3 for some n
Compute s = (r-1)/2

Do fast crude tests on BOTH r and s for primality, i.e. check for
small prime divisors (3,5,7,...).  If either one has a small divisor
throw both away and generate a new pair.  This lets you discard most
candidate pairs quickly.

Now do a more through test (Miller-Rabin or whatever) to make sure
r,s are really prime.

As mentioned, I have some code around that I'll post when I can find
it.  It's pretty straightforward and can generally find a pair within
a minute or so (maybe less, I don't really remember) on my p3-750.


From roy at panix.com  Thu Jan 22 21:13:31 2004
From: roy at panix.com (Roy Smith)
Date: Thu, 22 Jan 2004 21:13:31 -0500
Subject: I support PEP 326
References: <mailman.654.1074788734.12720.python-list@python.org>
	<401081A1.E4C34F00@alcyone.com>
Message-ID: <roy-1E6566.21133122012004@reader2.panix.com>

In article <401081A1.E4C34F00 at alcyone.com>,
 Erik Max Francis <max at alcyone.com> wrote:

> Gary Robinson wrote:
> 
> > I've recently had a couple of cases of needing exactly what it
> > proposes, and
> > having to kluge around the fact that it's not there. It's a great
> > idea.
> > 
> > If there anywhere else I should be expressing my opinion on this, let
> > me
> > know.
> 
> Seems quite reasonable to me.  The only issue I'd take with it is the
> choice of Min and Max for the names of the singletons; they're a little
> too close to the functions min and max, which obviously they're both
> likely to be used with.  I would suggest something a little more verbose
> such as Minimum and Maximum, or if you want to get silly, Infimum and
> Supremum.

I suppose you could special-case min() and max() to return the 
appropriate singletons if called with no arguments.

There's something very nice about that.  There's also something very 
ugly about it.  I'm having a hard time deciding which is stronger :-)


From gregadelliot at hotmail.com  Thu Jan 22 10:51:09 2004
From: gregadelliot at hotmail.com (jeff)
Date: 22 Jan 2004 07:51:09 -0800
Subject: performing action on set of charecters
Message-ID: <cdac0350.0401220751.618353a3@posting.google.com>

hiya,

Ive a load of binary in a file. Its 3 bit (2^3) and i wanna convert it
to an integer.

ive tried using theintergar = string.atoi(thebinary, 2), but that
doesnt take it as 3 bit binary

it has no spaces it it, so im a bit stuck as to how to do this with
python,

cheers

greg


From jjl at pobox.com  Mon Jan 19 16:16:48 2004
From: jjl at pobox.com (John J. Lee)
Date: 19 Jan 2004 21:16:48 +0000
Subject: secure unpickle?
References: <bufkot$96vl$1@netnews.upenn.edu>
	<mailman.497.1074496021.12720.python-list@python.org>
	<871xpwxe5g.fsf@pobox.com>
	<mailman.507.1074531363.12720.python-list@python.org>
Message-ID: <87vfn7abb3.fsf@pobox.com>

Gandalf <gandalf at geochemsource.com> writes:

> John J. Lee wrote:
> 
> >Gandalf <gandalf at geochemsource.com> writes:
> >[...]
> >
> >>I'm using this module (based on the documentation you mentioned):
> >>
> >[...snip...]
> >
> >What does this have to do with the question?  He was worried about
> >security of pickle, not asking how to call dumps() and loads().
> >
> Well, in that case, get my humble apologies.

It was an honest question (even though I didn't expect a useful answer
;-).  I now see (thanks to Tim's post) you *did* have an answer in
there.


John


From sholden at holdenweb.com  Fri Jan  9 10:10:55 2004
From: sholden at holdenweb.com (Steve Holden)
Date: Fri, 9 Jan 2004 10:10:55 -0500
Subject: FW: [zpugdc-gen] PyCon 2004
Message-ID: <CGECIJPNNHIFAJKHOLMAOEKLKAAA.sholden@holdenweb.com>

MessageBill reminds me to remind you that PyCon 2004 early-bird registration
ends soon. PyCon is shaping up, and registrations are coming in. Still room
for sprints on new topics, though - talk to Jeremy Hylton about them. Still
time to send in your paper, too. This year we are also looking for good
educational papers, as we have encouraged students to attend with a $50
discount, and they need good learning materials. Still a week before the
final paper submission deadline, so go for it!

regards
--
Steve Holden                                 http://www.holdenweb.com/
ReportLab Enterprise Publishing Solutions    http://www.reportlab.com/
Telephone: +1-800 494 3119                        Fax: +1 703 278 8289
PyCon DC 2004                George Washington University, March 24-26

  -----Original Message-----
  From: dc-gen-admin at lists.zpug.org [mailto:dc-gen-admin at lists.zpug.org]On
Behalf Of Barr Bill P
  Sent: Friday, January 09, 2004 9:22 AM
  To: 'dc-gen at lists.zpug.org'
  Subject: [zpugdc-gen] PyCon 2004


  Just a reminder that PyCon 2004 early-bird registration ends on Jan. 31.
It's only $175.00!

  http://pycon.org/dc2004/
  --
  Bill Barr
  "MDA is doing for design what UML has done for Java." -Allan Williams
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From alessandro at sephiroth.it  Sun Jan 18 08:30:24 2004
From: alessandro at sephiroth.it (Alessandro Crugnola *sephiroth*)
Date: Sun, 18 Jan 2004 13:30:24 GMT
Subject: wxpython toolbar separator and windows xp
Message-ID: <QTvOb.107765$VW.4396341@news3.tin.it>

Hi to all.
Using wxpython i can't see toolbar separators (only a space between buttons) under windows xp, is that a os problem ?

--
Alessandro




From peter at engcorp.com  Tue Jan  6 08:44:08 2004
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 06 Jan 2004 08:44:08 -0500
Subject: Speed?
References: <mailman.41.1073113311.12720.python-list@python.org>
Message-ID: <3FFABBA8.3A24716F@engcorp.com>

EP wrote:
> 
> On questions of the suitability of Python for CGI, embedded apps, etc.,
> execution speed comes to mind.  I previously read some comparisons which
> did not show Python in a good light in this regard: i.e. Python is slow
> compared to Perl, C++, Java.
> 
> http://www.flat222.org/mac/bench/
> 
> Is there more authoritative and current information IRT speed comparisons?
> 
> Is newer Python any faster?
> 
> Also, if Python is a bit slower in execution than some alternative
> languages, what do others do in practice to speed it up, and how much of
> that optimization do they do?  Or is a slower speed to be accepted like one
> learns to accept that their lovely bride takes a long time getting ready to
> go out ?

I would question the wisdom of using any generic benchmark (such as the
"console output test" you included) to make decisions about adoption of
key technologies.

Identify the core characteristics of your intended application, code up 
a simple benchmark which contains representative code, and see how it
stacks up against the competition.

We did this with Python on one embedded system we were considering,
with a benchmark that included threading, memory allocation and releasing,
some simple math, and lots of string operations.  The results told us
much more than PyStone or something similar would have, and gave us much
more confidence in the results.

And with Python, of course, it's almost trivial to do this kind of 
thing, compared to some other languages.  Sigh.

-Peter


From Bill.Scherer at verizonwireless.com  Wed Jan 28 08:44:58 2004
From: Bill.Scherer at verizonwireless.com (Bill Scherer)
Date: Wed, 28 Jan 2004 08:44:58 -0500
Subject: Compiling DCOracle2 on RH Linux 8.0
In-Reply-To: <ab425431.0401271256.acf131c@posting.google.com>
References: <ab425431.0401211512.6c698e00@posting.google.com>	<8725c51c.0401241912.316a7cfc@posting.google.com>
	<ab425431.0401271256.acf131c@posting.google.com>
Message-ID: <4017BCDA.5050401@VerizonWireless.com>

Ron Reidy wrote:

>dripton at wizard.net (David Ripton) wrote in message news:<8725c51c.0401241912.316a7cfc at posting.google.com>...
>  
>
>>reidyre at yahoo.com (Ron Reidy) wrote in message news:<ab425431.0401211512.6c698e00 at posting.google.com>...
>>
>>    
>>
>>>I am trying to compile DCOracle2 on RedHat 8.0 and make is giving me
>>>the following error:
>>>
>>>gcc -pthread -fPIC -DNDEBUG -g -O3 -Wall -Wstrict-prototypes
>>>-I/usr/local/include/python2.3 -I/usr/local/include/python2.3 @DEFS@  
>>>-I/oracle/app/oracle/9i/rdbms/demo
>>>-I/oracle/app/oracle/9i/network/public
>>>-I/oracle/app/oracle/9i/plsql/public
>>>-I/oracle/app/oracle/9i/rdbms/public -DORACLE9i -c ././dco2.c -o
>>>./dco2.o
>>>gcc: cannot specify -o with -c or -S and multiple compilations
>>>
>>>
>>>Did I do something wrong?
>>>      
>>>
>>No.  The DCOracle2 build process isn't very robust.
>>
>>Look at src/Makefile.  Find a line that says "DEFS=%DEFS" and change
>>it to "DEFS=-fno-strict-aliasing"
>>    
>>
>
>David,
>
>Thanks.  That worked well.  Now, how do I install it?  The only copies
>of dco2.so that exist are in the directory tree where I built the
>library.  In searching for any kind of install directios, I found
>nothing like 'make install', etc.
>
Ron -

At the same sevel as the src folder where you built dco2.so, you should 
find a DCOracle2 folder.  Put dco2.so in that folder, and copy that 
folder into your $PYTHONPATH (site-packages/ would do fine).  Then you 
should be able to start your python and import DCOracle2.

HTH,

  Bill

>
>Thanks you your help.
>  
>




From km at mrna.tn.nic.in  Sat Jan 17 12:08:08 2004
From: km at mrna.tn.nic.in (km)
Date: Sat, 17 Jan 2004 22:38:08 +0530
Subject: yield
Message-ID: <20040117170808.GA21486@mrna.tn.nic.in>

Hi all,

i didnt understand the purpose of  'yield' keyword and the concept of 'generators' in python.  can someone explain me with a small example how  generators differ from normal function calls?
kindly enlighten
regards,
KM






From donn at u.washington.edu  Fri Jan  2 16:56:00 2004
From: donn at u.washington.edu (Donn Cave)
Date: Fri, 02 Jan 2004 13:56:00 -0800
Subject: Problem building on BeOS...
References: <NLhJb.31440$I07.78784@attbi_s53>
	<bt4a9t$13e4$1@ulysses.news.tiscali.de>
	<f8iJb.42537$xX.145398@attbi_s02>
	<donn-8FEA6E.10503502012004@nntp1.u.washington.edu>
	<8zjJb.725764$Tr4.1845399@attbi_s03>
Message-ID: <donn-AF472B.13560002012004@nntp6.u.washington.edu>

In article <8zjJb.725764$Tr4.1845399 at attbi_s03>,
 Zoo Keeper <candiazoo at comcast.net> wrote:

> Is there a way to strip'em?  I see "cr nl".  :/

Certainly.  From the Terminal shell (where you ran "od"),

  $ tr -d '\r' < oldfile > newfile 

or if you want to use a more complicated procedure
(and untested)


#!/bin/sh
#
case $# in
0)  echo Usage: strip file [file ...] >&2 ;;
esac
new=uncr.$$
for file
do
    tr -d '\r' < $file > $new
    if cmp $file $new > /dev/null 2>&1
    then
        rm $new
    else
        save=$file.dist
        test -e $save || mv $file $save
        mv $new $file
    fi
done

   Donn Cave, donn at u.washington.edu


From hungjunglu at yahoo.com  Fri Jan  9 14:46:23 2004
From: hungjunglu at yahoo.com (Hung Jung Lu)
Date: 9 Jan 2004 11:46:23 -0800
Subject: Object-based inheritance in Python
References: <btm3u5$13so$1@f1node01.rhrz.uni-bonn.de>
	<btm4mo$qpt$06$1@news.t-online.com>
Message-ID: <8ef9bea6.0401091146.6a86ac0a@posting.google.com>

Stephan Diehl <stephan.diehlNOSPAM at gmx.net> wrote in message news:<btm4mo$qpt$06$1 at news.t-online.com>...
> Tobias Windeln wrote:
> > 
> > I'm looking for suggestions on object-based inheritance
> > in Python. Automatic forwarding (often called delegation)
> > in Python is easy:
> > 
> 
> Have a look at Hans Nowaks 'selfish' implementation:
> http://zephyrfalcon.org/download/selfish-0.4.2.zip
> 
> This is a pythonesque interpretation of the 'self' language by Sun.
> By the way, if you are googling, you want probably look for 'prototype based
> languages'.

Seems like prototype-based languages are catching up the attention of
people. I have looked at them recently. My feeling is that somehow
main development stopped around 1997. I have looked at Io (I know it's
born in 2002, but the ideas come from before), but I just get the
feeling that Io is not "clean" enough. Anyway, I think that instead of
designing final languages, it's a better idea to make *prototype*
languages (sorry for the pun) and experiment with various features.
One problem I've seen in Io is that they started to write software,
when the language itself is not well-defined yet. And so, you make
changes to the language, and you have to make corrections to large
body of existing code. And, also, once too much code is written with
existing language, it becomes really hard to make language changes
later: too much work to update legacy packages.

There are a few problems with current programming languages that only
come to bite you at large scale projects (Multiple Inheritance,
Metaprogramming, AOP, Multiple Version handling,
Transactional/Incremental programming with real-time rollback/undo,
ideas from Functional languages, etc.) And my experience has been that
the more complex your project becomes, the more you wish you had a
simple, clean, solid, powerful theoretical foundation for your
programming language. Prototype-based seems the right direction to go,
but I am kind of disappointed at all existing prototype-based
languages out there. Somehow something happened in 1997 that stopped
research in this direction. And now the prototype-based languages seem
so much behind. It's like time has been frozen for 6 years.

regards,

Hung Jung


From martin at v.loewis.de  Fri Jan  2 12:41:13 2004
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Fri, 02 Jan 2004 18:41:13 +0100
Subject: Problem building on BeOS...
In-Reply-To: <NLhJb.31440$I07.78784@attbi_s53>
References: <NLhJb.31440$I07.78784@attbi_s53>
Message-ID: <bt4afp$rgo$03$1@news.t-online.com>

Zoo Keeper wrote:

> For some reason, the Python preprocessing balks on the "\" line continuation
> character.  Any ideas/thoughts?  Is it just that my version of gcc is not
> supported?

Yes, in combination with the way your source files are structured.

It appears that the line ending convention differs in your source files
from the line endings that gcc expects. E.g. the source files may have
\r\n at the end of a line, whereas your gcc may expect only \n. As
a result, \\\r\n is treated as an escaped \r, which gives a stray \.

I don't know what line ending convention your system uses, or where
you got the sources from, but it appears you need to convert them.

Later versions of gcc support "universal text mode".

Regards,
Martin



From LittleDanEhren at yahoo.com  Sat Jan 31 14:34:28 2004
From: LittleDanEhren at yahoo.com (Daniel Ehrenberg)
Date: 31 Jan 2004 11:34:28 -0800
Subject: Python vs. Io
References: <711c7390.0401291301.3f95794@posting.google.com>
	<D6wSb.6538$qU3.576425@news20.bellglobal.com>
	<711c7390.0401301726.3e38da27@posting.google.com>
	<KCESb.6856$qU3.625838@news20.bellglobal.com>
Message-ID: <711c7390.0401311134.26cd0a11@posting.google.com>

> I think I get the idea. Let's see:
> 
> P = Object clone do(  # saw do() used in iolanguage mail archive
>     allocated = 0
>     init = method(
>         id := allocated    # semi-colons required?
>         allocated += 1
>     )
>     howMany = method(return allocated)
> )
> 
> x := P clone
> y := P clone
> write("allocated? ", P howMany())
> # output ...
> # allocated? 2
> 
> Correct?
> 
No, init and allocated should have used :=, even though init has
special meaning. I don't really know why you have the howMany method
since it doesn't really do anything (everything is public and methods
can be called with just references), and all clones of P will
dynamically inheret allocated. Also, when initializing variables,
their scope must be specified (which is the whole reason for the
difference between := and =), so id := allocated should probably be
self id := allocated. self, along with a few other variables, is
implicitly sent to all functions (and do).

> Thanks for making me aware of this language, it has some
> interesting ideas. I'm not annoyed by the difference between :=
> and =. I understand the issue(s) they're trying to solve: you don't
> need to declare local variables, or use self, explicitly. I don't have
> a problem with that. I imagine it could lead to subtle bugs (if you
> update a slot when you meant to set a new one), but that is only
> speculation on my part.

Actually, the whole scoping model is really that you're working in
transparent objects with inheretance, even for things like the global
scope and the scope of functions.
> 
> I'm not a fan of the parenthesis (which might be expected from
> a Python user - love that significant whitespace ;).

At first I didn't like them easier, and with the syntax of most
languages, there really isn't any advanatage, but Io code by
convention can be much more dense (while still readible). For example,
Io doesn't have a ternary operator (like Python), but the flow control
function if can be used like one. For example:

x := if(Nil, 1, 0)

would set x to 0. Note that only Nil (and things that emulate Nil) are
false in the context of if.

> I'm also not a
> big fan of 'clone', I'd rather see 'new', but I do understand why
> 'clone' is more apt. Of course, in this language, you could always
> just say
> 
> Object new = Object getSlot("clone")
> P = Object new
> ...
> 
> I can appreciate the flexibility of that.

Yeah, that is an advantage. That way of using 'new' will be inhereted
dynamically for all objects.

Daniel Ehrenberg


From steve at ferg.org  Thu Jan  8 18:20:00 2004
From: steve at ferg.org (Stephen Ferg)
Date: 8 Jan 2004 15:20:00 -0800
Subject: what is Python's module search path?
References: <b16e4ef7.0401080738.1da0cdc5@posting.google.com>
	<iu4rvvcipctl7l46jhskbc6ubj3cu52iu9@4ax.com>
Message-ID: <b16e4ef7.0401081520.67bcf14a@posting.google.com>

Thanks.

It says """When a module named spam is imported, the interpreter
searches for a file named spam.py in the current directory, and then
in the list of directories specified by the environment variable
PYTHONPATH. ... When PYTHONPATH is not set, or when the file is not
found there, the search continues in an installation-dependent default
path; on Unix, this is usually .:/usr/local/lib/python.

Actually, modules are searched in the list of directories given by the
variable sys.path which is initialized from the directory containing
the input script (or the current directory), PYTHONPATH and the
installation-dependent default."""

Is the installation-dependent default path on Windows usually
Lib/site-packages?

If so, then it looks like my original search order was wrong, 
and the correct search order (on Windows) is:

---------------------------------------------------------
 * Python's built-in modules, including modules in the standard
library
 * the directory from which your main module was loaded
 * in directories in PYTHONPATH
 * in the /python23/Libs/site-packages directory
--------------------------------------------------------

Is that correct?

Part of what is confusing me is that Lib/site-packages is pretty
poorly documented.


From news at grauer-online.de  Sun Jan 25 09:35:27 2004
From: news at grauer-online.de (Uwe Grauer)
Date: Sun, 25 Jan 2004 15:35:27 +0100
Subject: My Python cannot find wxPython
In-Reply-To: <692feddd.0401241448.447817e2@posting.google.com>
References: <692feddd.0401221457.18d40480@posting.google.com>
	<692feddd.0401241448.447817e2@posting.google.com>
Message-ID: <bv0k6f$64t$1@online.de>

Equis Uno wrote:
 > ...
> 
> Next, I downloaded  boa-constructor-0.2.3.src.zip
> 

Get Boa from cvs on sf.net.
Actual version is 0.2.8

Uwe


From bogdanal at b.astral.ro  Sat Jan 10 03:36:07 2004
From: bogdanal at b.astral.ro (Bogdan Marinescu)
Date: Sat, 10 Jan 2004 10:36:07 +0200
Subject: Yet another RE question
Message-ID: <002b01c3d754$cbe9d5b0$a3e3a4d5@darkore>

    Hello all,

    First I want to apologize if this was already discussed before, I can't find an answer anywhere right now. I'm writing a simple compiler for a small language using Spark (http://pages.cpsc.ucalgary.ca/~aycock/spark/). And I just found out that the regular expressions in Python follow the Perl semantics (first-then-longest) instead of the POSIX semantics (longest match). This is quite annoying for me; while some solutions to this problem exists and they are shown in the Spark documentation, I have some background with lex/yacc and I would really like to use the "lex" semantics (longest match). Is there a package for Python that implements this behaviour?
    Thank you,

    Bogdan
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From: NAVExchangeprotection at pantheon1.com (NAV for Exchange)
Date: Mon, 26 Jan 2004 20:24:40 -0600
Subject: Norton AntiVirus detected a virus in a message you sent. The
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Message-ID: <2FD388D0DD3CD04280A70646799A413E07C5BB@zeus.pantheon1.com>

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From guido at python.org  Mon Jan  5 12:44:19 2004
From: guido at python.org (Guido van Rossum)
Date: Mon, 05 Jan 2004 09:44:19 -0800
Subject: PyCon Reminder: Proposal deadline 1/15
Message-ID: <200401051744.i05HiJN08590@c-24-5-183-134.client.comcast.net>

This is a reminder that the deadline for sending proposals for
presentations at PyCon DC 2004 is January 15, 2004.

We are interested in any and all submissions about uses of Python and
the development of the language.  Since there is expected to be a
strong educational community presence for the next PyCon, teaching
materials of various kinds are also encouraged.

You can submit your proposal at:

    http://submit.pycon.org/

For more information about proposals, see:

    http://www.pycon.org/dc2004/cfp/

If you have further questions about the submission web interface or
the format of submissions, please write to:

    pycon-organizers at python.org

We would like to publish all accepted papers on the web.  If your
paper is accepted and you prepare an electronic presentation (in PDF,
PythonPoint or PowerPoint) we will also happily publish that on the
web site once PyCon is over.

If you don't want to make a formal presentation, there will be a
significant amount of Open Space to allow for informal and
spur-of-the-moment presentations for which no formal submission is
required.  There will also be several Lightning Talk sessions (five
minutes or less).

About PyCon:

PyCon is a community-oriented conference targeting developers (both
those using Python and those working on the Python project).  It gives
you opportunities to learn about significant advances in the Python
development community, to participate in a programming sprint with
some of the leading minds in the Open Source community, and to meet
fellow developers from around the world.  The organizers work to make
the conference affordable and accessible to all.

PyCon DC 2004 will be held March 24-26, 2004 in Washington, D.C.  The
keynote speaker is Mitch Kapor of the Open Source Applications
Foundation (http://www.osafoundation.org/).  There will be a four-day
development sprint before the conference.

We're looking for volunteers to help run PyCon.  If you're interested,
subscribe to http://mail.python.org/mailman/listinfo/pycon-organizers

Don't miss any PyCon announcements!  Subscribe to
http://mail.python.org/mailman/listinfo/pycon-announce

You can discuss PyCon with other interested people by subscribing to
http://mail.python.org/mailman/listinfo/pycon-interest

The central resource for PyCon DC 2004 is http://www.pycon.org/

Pictures from last year's PyCon:
http://www.python.org/cgi-bin/moinmoin/PyConPhotos

I'm looking forward to seeing you all in DC in March!!!

--Guido van Rossum (home page: http://www.python.org/~guido/)



From kkto at csis.hku.hk  Wed Jan 14 20:36:17 2004
From: kkto at csis.hku.hk (Isaac To)
Date: Thu, 15 Jan 2004 09:36:17 +0800
Subject: confusion about Exception Mechanism
References: <bu4qhr$dbqj3$1@ID-221199.news.uni-berlin.de>
Message-ID: <7ik73uouwe.fsf@enark.csis.hku.hk>

>>>>> "Zachary" == Zachary  <Z_kline at hotmail.com> writes:

    Zachary> Hello, I'm relatively new at Python, and am slightly confused
    Zachary> about how the try...except mechanism is supposed to work.  I am
    Zachary> just not sure how it would be used, as it just seems that it is
    Zachary> another sort of loop.  Is their any sort of example I could
    Zachary> look at, that has an example of how it is applied?  I haven't
    Zachary> really seen any such full example.

How you think that exception is a kind of loop?  E.g., documentation where
you get that idea?  If any documentation leads you to think that way, the
documentation must be clarified (e.g., by modifying it).

Regards,
Isaac.



From jdhunter at ace.bsd.uchicago.edu  Tue Jan 27 22:56:59 2004
From: jdhunter at ace.bsd.uchicago.edu (John Hunter)
Date: Tue, 27 Jan 2004 21:56:59 -0600
Subject: Upgrading Python on Red Hat 7.2?
In-Reply-To: <CAFRb.318$VP1.307693@newshog.newsread.com> (Leif K-Brooks's
	message of "Wed, 28 Jan 2004 02:59:46 GMT")
References: <CAFRb.318$VP1.307693@newshog.newsread.com>
Message-ID: <m28yjswws4.fsf@mother.paradise.lost>

>>>>> "Leif" == Leif K-Brooks <eurleif at ecritters.biz> writes:

    Leif> I have an ancient server with Red Hat 7.2 and Python
    Leif> 1.5.2. I want to install mod_python, but I'll need a version
    Leif> of python from some time after the stone age to do
    Leif> that. Up2date is broken (missing Python module, go figure),
    Leif> so I can't use that. The latest RPMs seem to be for Red Hat
    Leif> 9, will they work with 7.2? If not, will building from
    Leif> source make versioned binaries only (/usr/bin/pythonX.X
    Leif> instead of /usr/bin/python)?

The default build

  > ./configure
  > sudo make install

will install to /usr/local/ and thus will not overwrite
/usr/bin/python.  

JDH






From jepler at unpythonic.net  Sun Jan 18 16:15:59 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Sun, 18 Jan 2004 15:15:59 -0600
Subject: parse binary file in python?
In-Reply-To: <Pine.LNX.4.58.0401182201180.1249@leopard.stud.ntnu.no>
References: <Pine.LNX.4.58.0401182201180.1249@leopard.stud.ntnu.no>
Message-ID: <20040118211559.GC20915@unpythonic.net>

Python's primary tool for this is the "struct" module.  See the stanard
library documentation for more info.

Also, remember always to open files in binary mode ("rb") so that people
running on windows don't get bizarre failures.

Jeff



From bart_nessux at hotmail.com  Thu Jan 15 15:31:49 2004
From: bart_nessux at hotmail.com (Bart Nessux)
Date: Thu, 15 Jan 2004 15:31:49 -0500
Subject: python & mathematical methods of picking numbers at random
In-Reply-To: <7xd69largm.fsf@ruckus.brouhaha.com>
References: <bu6ptu$kjm$1@solaris.cc.vt.edu>
	<7xd69largm.fsf@ruckus.brouhaha.com>
Message-ID: <bu6tbl$pmn$1@solaris.cc.vt.edu>

Paul Rubin wrote:
> Bart Nessux <bart_nessux at hotmail.com> writes:
> 
>>I am using method 'a' below to pick 25 names from a pool of 225. A
>>co-worker is using method 'b' by running it 25 times and throwing out
>>the winning name (names are associated with numbers) after each run
>>and then re-counting the list and doing it all over again.
>>
>>My boss thinks that 'b' is somehow less fair than 'a',
> 
> 
> Both are the same, as you can see by calculating the probability of
> any given name being selected.  What is the application, and the
> computer environment?  You may also need to worry about correlations
> in the underlying Mersenne Twister PRNG.  If the application is
> something where randomness is very important (you're picking winners
> for a big lottery or something) then you should use a better RNG.

We're raffling off crock-pots... that's why I think this is OK for our 
purposes.



From bokr at oz.net  Thu Jan  8 14:14:18 2004
From: bokr at oz.net (Bengt Richter)
Date: 8 Jan 2004 19:14:18 GMT
Subject: OT: Vertical Tab was Re: indendation question
References: <20031226033210.GA24039@mrna.tn.nic.in>
	<mailman.130.1072540438.684.python-list@python.org>
	<3FF9E883.BC8AB864@engcorp.com>
	<pan.2004.01.05.23.05.44.722929@yahoo.com>
	<246a4e07.0401062301.880cb64@posting.google.com>
Message-ID: <btka6a$grk$0@216.39.172.122>

On 6 Jan 2004 23:01:36 -0800, frank at chagford.com (Frank Millman) wrote:

>Samuel Walters <swalters_usenet at yahoo.com> wrote in message news:<pan.2004.01.05.23.05.44.722929 at yahoo.com>...
>> 
>> What exactly *is* a vertical tab?  I don't think I've ever seen it on a
>> keyboard or used in the wild.  I think I may have seen it on the
>> keybindings for a mainframe terminal I once used, but I didn't really dig
>> too deep because, as far as operating the mainframe was concerned, I was a
>> well trained monkey who could check and restart failed jobs.
>> 
>> Inquiring minds want to know.
>> 
>> Sam Walters
>
>I could be wrong, but I seem to remember reading years ago that
>vertical tabs were used to control line printers - you could force the
>printer to skip straight to a line number instead of issuing a series
>of line feeds.
>
IIRC some line printers had a punched tape loop that could be punched to indicate
stops for VT and FF. And if the tape broke you wound up with the rest of your box
of fanfold paper all over the floor, since normal gravity was not enough to refold
the amazing spew of output. Add multipart with carbon paper etc for extra fun.

Regards,
Bengt Richter


From CousinStanley at hotmail.com  Fri Jan  9 20:18:24 2004
From: CousinStanley at hotmail.com (Cousin Stanley)
Date: Fri, 9 Jan 2004 18:18:24 -0700
Subject: Problem with OpenGL.GLUT
References: <7447dd2a.0401071402.2c0737e6@posting.google.com>
	<btn17b$97bnn$1@ID-130333.news.uni-berlin.de>
	<87oetchk33.fsf@hugin.valhalla.net>
Message-ID: <btnjq6$97603$1@ID-130333.news.uni-berlin.de>

Sean .... 

    The link that Mike Fletcher posted ....

        http://pyopengl.sourceforge.net/documentation/installation.html   

    Leads ultimately to the one you posted ....

        http://www.xmission.com/%7Enate/glut.html

    I now have a  glut32.dll  that works fine
    with Python 2.3 / PyOpenGL .... 

    Thanks for the info ....

-- 
Cousin Stanley
Human Being
Phoenix, Arizona



From me at privacy.net  Wed Jan 14 17:21:22 2004
From: me at privacy.net (James Keasley)
Date: 14 Jan 2004 22:21:22 GMT
Subject: The GPL / BSD cultural divide (was ProtoCiv: porting Freeciv to
	Python CANNED)
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<n22Nb.11299$9k7.210522@news.xtra.co.nz>
	<bu2pgs$d123a$1@ID-207230.news.uni-berlin.de>
	<4004EC9E.1E2E2893@alcyone.com> <bu3iv2$n2u$4@tyfon.itea.ntnu.no>
	<bu4dii$daqjq$1@ID-207230.news.uni-berlin.de>
Message-ID: <slrnc0bg61.3p2.me@localhost.localdomain>

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

In article <bu4dii$daqjq$1 at ID-207230.news.uni-berlin.de>, Brandon J. Van Every wrote:

> Agreed, and more specifically, there is a huge *cultural divide* between
> most OSS developers and proprietary commercial developers who simply want to
> add some OSS "to get the boring bits over with." 

Yeah, it indicates that you are a lazy cunt who wants to get something for
nothing, if you want to use someone elses work that you haven't commissioned
from them, find what you want from someone who isn't fussed, and has used the 
BSD license, people who have used the GPL have done so cos they *don't* 
want some software company ripping off their hard work and not contributing 
anything back.

> In fact, one can identify the locus of problems by simply asking, "How many
> OSS game developers are willing to work on something with a BSD license?"
> Precious few.  Most BSD licenses out there are not game software.  BSD is a
> good indicator that someone cares about commercial concerns.

So is the use of the GPL, the people who use that care that commercial
concerns can't come along, take their hard work, file off a few serial 
numbers and flog for $BIG_NUM. If that pisses you off what of it, I 
suspect that the writers of the software care about as much as I do.

- -- 
James						jamesk[at]homeric[dot]co[dot]uk

I replaced the headlights on my car with strobe lights. Now it looks like 
I'm the only one moving.  (Steven Wright)
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From gerrit at nl.linux.org  Sat Jan  3 16:09:49 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Sat, 3 Jan 2004 22:09:49 +0100
Subject: importing
In-Reply-To: <231bc96c.0401031249.12cff6d7@posting.google.com>
References: <231bc96c.0401031249.12cff6d7@posting.google.com>
Message-ID: <20040103210948.GA772@nl.linux.org>

Boomer wrote:
> here's the error
> 
> Traceback (innermost last):
>   File "<string>", line 5, in ?
> AttributeError: 'string' object has no attribute 'split'

You are probably running an ancient Python version. Try upgrading to
Python 2.3. If you can't, try to import string and use string.split.
If this doesn't work, please send the error message to the list...

yours,
Gerrit.

-- 
15. If any one take a male or female slave of the court, or a male or
female slave of a freed man, outside the city gates, he shall be put to
death.
          -- 1780 BC, Hammurabi, Code of Law
-- 
Asperger's Syndrome - a personal approach:
	http://people.nl.linux.org/~gerrit/english/



From aahz at pythoncraft.com  Mon Jan 12 23:42:29 2004
From: aahz at pythoncraft.com (Aahz)
Date: 12 Jan 2004 23:42:29 -0500
Subject: Python is far from a top performer according to benchmark
	test...
References: <ryELb.238$tK2.228@amstwist00>
	<6ee58e07.0401092129.302cb9d4@posting.google.com>
	<pan.2004.01.11.06.08.18.867825@yahoo.com>
	<bttu62$gdh$1@newstree.wise.edt.ericsson.se>
Message-ID: <btvsvl$pu7$1@panix3.panix.com>

In article <bttu62$gdh$1 at newstree.wise.edt.ericsson.se>,
Frithiof Andreas Jensen <frithiof.jensen at removethis.ted.ericsson.dk> wrote:
>
>That, in my opinion, is wrong: Fortran is successful because it was there
>first!

Which brings up the obvious question: why isn't Lisp successful?
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

A: No.
Q: Is top-posting okay?


From max at alcyone.com  Thu Jan  8 06:50:04 2004
From: max at alcyone.com (Erik Max Francis)
Date: Thu, 08 Jan 2004 03:50:04 -0800
Subject: Why " ".some_string is often used ?
References: <Xns94698A5566736stefninnospamyahoofr@213.228.0.4>
	<vvqghojub1dl07@news.supernews.com>
Message-ID: <3FFD43EC.BC8240F9@alcyone.com>

John Roth wrote:

> And I agree, it's not entirely obvious why it's a string
> method rather than a list method, since it operates on
> a list, not on a string. The only explanation that makes
> sense is that, as a list method, it would fail if the list
> contained something other than a string. That's still
> not very friendly, though.

On the contrary, I think that's the best reason.  Lists have nothing to
do with strings, and so very string-specific methods (discounting
system-wide things such as str or repr) being included in lists is not
the right approach.  Furthermore, the methods associated with a list
tend to become the "pattern" that sequence types must fulfill, and it
sets a terribly bad precedent to attach whatever domain-specific
application that's needed into a sequence type just because it's easiest
on the eyes at the moment.

The .join method is inherently string specific, and belongs on strings,
not lists.  There's no doubting that seeing S.join(...) for the first
time is a bit of a surprise, but once you understand the reasoning
behind it, it makes perfect sense and makes it clear just how much it
deserves to stay that way.

And above all, of course, if you think it personally looks ugly, you can 

	from string import join

or write your own join function that operates over sequences and does
whatever else you might wish.  That's what the flexibility is there for.

-- 
 __ Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
/  \ San Jose, CA, USA && 37 20 N 121 53 W && &tSftDotIotE
\__/ Life is not a spectacle or a feast; it is a predicament.
    -- George Santayana


From raims at dot.com  Mon Jan 19 09:22:08 2004
From: raims at dot.com (Lawrence Oluyede)
Date: Mon, 19 Jan 2004 15:22:08 +0100
Subject: Tkinter
References: <mailman.501.1074519339.12720.python-list@python.org>
Message-ID: <87oet0ow6n.fsf@mobile.foo>

km <km at mrna.tn.nic.in> writes:

> Is there any good online tutorial which is a good intro for Tkinter
> programming in Python ?

http://www.pythonware.com/library/an-introduction-to-tkinter.htm

-- 
Lawrence "Rhymes" Oluyede
http://loluyede.blogspot.com


From theller at python.net  Mon Jan 12 16:27:28 2004
From: theller at python.net (Thomas Heller)
Date: Mon, 12 Jan 2004 22:27:28 +0100
Subject: py2exe, Inno Setup, and tkinter
References: <mailman.276.1073790578.12720.python-list@python.org>
Message-ID: <oet8uabj.fsf@python.net>

Anthony Baxter <anthony at interlink.com.au> writes:

> I'm trying to use py2exe and Inno Setup to build an installer for 
> shtoom, which uses tkinter.
>
> If I take the py2exe generated directory, and run the executable from
> there, it works fine.
>
> If I add all the files in the directory to an installer (including 
> the tk-8.4 and tcl-8.4 directories), it builds an installer fine.
>
> But when I run the installer, and install to, say c:/Program Files/Shtoom,
> running the program fails with 
> Traceback (most recent call last):
>   File "<string>", line 78, in ?
>   File "<string>", line 75, in main
>   File "<string>", line 66, in findUserInterface
>   File "<string>", line 33, in tryTkInterface
>   File "shtoom\ui\tkshtoom.pyc", line 23, in main
>   File "shtoom\ui\tkui\main.pyc", line 11, in __init__
>   File "Tkinter.pyc", line 1564, in __init__
> _tkinter.TclError: Can't find a usable init.tcl in the following directories: 
>     {c:/Program Files/lib/tcl8.4} {c:/Program Files/lib/tcl8.4} c:/lib/tcl8.4 {c:/Program Files/library} c:/library c:/../tcl8.4.3/library
>
> This probably means that Tcl wasn't installed properly.
>
> The init.tcl is actually in C:/Program Files/Shtoom/tcl8.4. Why is
> it not looking in the correct location? How can I fix this? 

Are you sure your installer reproduces the same directory structure as
the dist directory has?

I would expect the init.tcl in this directory:

c:/Program Files/shtoom/tcl/tcl8.4/init.tcl

Thomas


From admin2 at enabled.com  Fri Jan 16 12:54:44 2004
From: admin2 at enabled.com (Noah)
Date: Fri, 16 Jan 2004 09:54:44 -0800
Subject: cannot find input file: Modules/Setup.config.in
Message-ID: <20040116175444.M21972@enabled.com>

freeBSD 4-8 STABLE

cant install Python-2.3.3

configure: creating ./config.status
config.status: creating Makefile.pre
config.status: creating Modules/Setup.config
config.status: error: cannot find input file: Modules/Setup.config.in

clues please?

- Noah



From Z_kline at hotmail.com  Wed Jan 14 20:31:41 2004
From: Z_kline at hotmail.com (Zachary)
Date: Wed, 14 Jan 2004 17:31:41 -0800
Subject: confusion about Exception Mechanism
Message-ID: <bu4qhr$dbqj3$1@ID-221199.news.uni-berlin.de>

Hello,
I'm relatively new at Python, and am slightly confused about how the
try...except mechanism is supposed to work.  I am just not sure how it would
be used, as it just seems that it is another sort of loop.  Is their any
sort of example I could look at, that has an example of how it is applied?
I haven't really seen any such full example.
Thanks, And Sorry for the newbie Question,
Zack




From deets_noospaam at web.de  Wed Jan 14 08:43:01 2004
From: deets_noospaam at web.de (Diez B. Roggisch)
Date: Wed, 14 Jan 2004 14:43:01 +0100
Subject: passing callback function to c-extension
Message-ID: <bu3h15$dlk$00$1@news.t-online.com>

Hi,

I'm currently writing my first c-extension module. First of all: distutils
and the tutorial for embedding/extending rock! Great work, guys.

However, I didn't find a hint how to pass a python callback function.
Googling didn't turn out much useful stuff, so I'd be glad if someone could
post a hint on how to do this.

Regards,

Diez


From mwilson at the-wire.com  Thu Jan 22 10:07:44 2004
From: mwilson at the-wire.com (Mel Wilson)
Date: Thu, 22 Jan 2004 10:07:44 -0500
Subject: Identifing current function
References: <pan.2004.01.22.02.21.53.368742@doe.com>
	<slrnc0udgf.flo.bignose-hates-spam@iris.polar.local>
Message-ID: <Ad+DAls/KfnF089yn@the-wire.com>

In article <slrnc0udgf.flo.bignose-hates-spam at iris.polar.local>,
Ben Finney <bignose-hates-spam at and-benfinney-does-too.id.au> wrote:
>On Thu, 22 Jan 2004 02:21:54 GMT, Brian Donovan wrote:
>>   Is there a way to identify the current function. For example:
>>
>> class A:
>>    def B(self):
>>       print current_function_name
>
>Functions, like all objects, have no inherent name.  Names are bound to
>objects; each object can have zero, one or more names bound to it.  None
>of the names has any particular status as "the" name of the object.

   Functions, classes and modules do have a __name__
attribute.  This is often (but not necessarily) the same as
the name the thing goes by in a namespace that knows it.  It
might or might not be the name the O.P. wants.

        Regards.        Mel.


From reply.in.the.newsgroup at my.address.is.invalid  Fri Jan 23 05:04:47 2004
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Fri, 23 Jan 2004 11:04:47 +0100
Subject: cgi concurrency approaches?
References: <7x7jzjgso7.fsf@ruckus.brouhaha.com>
Message-ID: <66s11056aptit3vd2inv3p3r07v95k52ha@4ax.com>

Paul Rubin <http://phr.cx at NOSPAM.invalid>:
>I'm wondering if folks here have favorite lightweight ways of dealing
>with concurrency in cgi's.  Take a simple case:
>
>You want to write a cgi that implements a simple counter.  The first
>time it's called, it prints "1".  The next time, "2", etc.
[...]
>Anyone have some simpler approaches?

Use mod_python and keep the counter in a Python variable (if the value
needs not be persistent).
http://www.modpython.org/

-- 
Ren? Pijlman


From dkuhlman at rexx.com  Sun Jan  4 19:42:59 2004
From: dkuhlman at rexx.com (Dave Kuhlman)
Date: Sun, 04 Jan 2004 16:42:59 -0800
Subject: Progress indicator during FTP upload
References: <bt9m62$15te$1@ns.felk.cvut.cz>
	<20040104221012.0cc111a3.no.spam@box>
Message-ID: <btabu8$52m7t$1@ID-139865.news.uni-berlin.de>

Christophe Delord <no.spam> wrote:

> On Sun, 04 Jan 2004 19:31:34 +0100, Frantisek Fuka wrote:
> 
>> My application uses ftplib to upload files to remote server. What
>> is the cleanest way to provide progress indicator for long files?
>> What exactly should I override in the ftplib (I am not very
>> proficient in the FTP protocol)?
>> 
> 
> Hello,
> 
> To update my web site I wrote a script in wich I have overriden
> ftplib.FTP to print a dot when a block of bytes is sent. Here is
> my dot_FTP class :

Slick.  Thank you.

Dave

[snip]


-- 
http://www.rexx.com/~dkuhlman
dkuhlman at rexx.com


From graham at rockcons.co.uk  Sun Jan  4 14:20:12 2004
From: graham at rockcons.co.uk (Graham Nicholls)
Date: Sun, 04 Jan 2004 19:20:12 +0000
Subject: Launching pdb from within a script
References: <UNYJb.14065$Od5.5161@news-binary.blueyonder.co.uk>
	<bt9mhl$9k2$06$1@news.t-online.com>
Message-ID: <MHZJb.14962$Od5.2841@news-binary.blueyonder.co.uk>

Peter Otten wrote:

> Graham Nicholls wrote:
> 
>> A year or so ago, I was given a really useful answer to a question posed
>> here, which showed me how to start the debugger from withing a script.
> 
> Are you looking for pdb.set_trace()?
> 
> Peter
I think so, thanks!
Graham
-- 
#include <wit>


From tcdelaney at optusnet.com.au  Sat Jan 24 02:29:56 2004
From: tcdelaney at optusnet.com.au (Tim Delaney)
Date: Sat, 24 Jan 2004 18:29:56 +1100
Subject: C compilers
References: <X59Qb.20838$q4.11416@newsread3.news.atl.earthlink.net>
	<mailman.701.1074876702.12720.python-list@python.org>
Message-ID: <40121ef3$0$14480$afc38c87@news.optusnet.com.au>

"Gerrit Holl" <gerrit at nl.linux.org> wrote:
> Lucas Raab wrote:
> > I realize that this is a Python newsgroup, but do any of you know any
good
> > C/C++ compilers??
>
> yes

Now now Gerrit - you know you should always include the link in such a
response ...

http://www.catb.org/~esr/faqs/smart-questions.html

Tim Delaney




From jeremy at alum.mit.edu  Thu Jan 22 14:13:34 2004
From: jeremy at alum.mit.edu (Jeremy Hylton)
Date: Thu, 22 Jan 2004 14:13:34 -0500
Subject: I support PEP 326
In-Reply-To: <40100B15.7060308@prescod.net>
References: <BC3563A3.3C38C%grobinson@transpose.com>
	<40100B15.7060308@prescod.net>
Message-ID: <1074798814.27007.148.camel@localhost.localdomain>

On Thu, 2004-01-22 at 12:40, Paul Prescod wrote:
> As a matter of style wouldn't it be nice to refer to PEPs both by number 
> and by name? It is just a minor oversight but there is a tendency of 
> communities to migrate to refering to things just by numbers in a way 
> that excludes newcomers or hobbiests.
> 
> NOT directed at you in particular Gary!

What's PEP 326 again?

Jeremy





From theller at python.net  Thu Jan  8 04:15:01 2004
From: theller at python.net (Thomas Heller)
Date: Thu, 08 Jan 2004 10:15:01 +0100
Subject: "Interrupted function call" exception while relogging :(
References: <f6554b84.0401080103.565e2f93@posting.google.com>
Message-ID: <4qv6n6ne.fsf@python.net>

lubowiecka at go2.pl (Sylwia) writes:

> Hi!
>
> I need your help...
>
> I have the following problem. I've implemented the python Windows
> Service which behaves like a log supervisor. If the space
>
> used by log files is bigger than a given upper limit, then it starts
> to delete log files until the space is less than a given
>
> lower limit. I configured the service to start up automatically on
> system boot. The script checks the space used by log files
>
> every 1000 secs. After analyse of the space, it falls asleep
> (time.sleep(1000)). Everything works OK, except one thing...
>
> Since the service is not tied to the user ID of the person starting
> it, the service should remain open even when that person
>
> who started it logs off. So I made an experiment and relogged. After
> that it turned out that the service stopped working. The
>
> Event Viewer returned the error:
>
> "SvcDoRun
>     time.sleep(1000) 
>  exceptions.IOError: [Errno 4] Interrupted function call
> "
> I use Window XP OS and Python and Python 2.3.2 

Just an idea: you could try to use win32api.Sleep() instead.

Thomas


From mwh at python.net  Mon Jan  5 12:12:53 2004
From: mwh at python.net (Michael Hudson)
Date: Mon, 5 Jan 2004 17:12:53 GMT
Subject: Scoped Lock
References: <bt9ovs$p92$1@graf.cs.uni-magdeburg.de>
	<3ff8a259$0$121$e4fe514c@dreader10.news.xs4all.nl>
Message-ID: <m37k06720b.fsf@pc150.maths.bris.ac.uk>

Ype Kingma <ykingma at accessforall.nl> writes:

> Marco Bubke wrote:
> 
> > Hi
> > 
> > There is the Lock object in the threading module.
> > But there is no medode there I could aquire a scoped
> > lock like:
> > 
> > mutex = threading.Lock()
> > my_lock = mutex.scoped_acquire() # maybe scoped_lock()
> > #now this stuff is locked
> > 
> > del mylock
> > 
> > #the lock is released.
> > 
> > def do_domething:
> >   my_lock = mutex.scoped_acquire()
> >   #now this stuff is locked
> >   #the lock is released after its out of scope
> > 
> > 
> > I have written this my own but I'm not sure there is a drawback
> > because its looks so convinent. So I wonder why its not in
> > the module?
> 
> Some reasons:
> - What should happen when an exception happens during the locked stuff?
> - It is possible pass a reference to the lock during the locked stuff,
>   so although the lock goes out of local scope, there still might be
>   a reference to it.
> - The moment that __del__() is called is not guaranteed.
> 
> You can also do it like this:
> 
> mutex = threading.Lock()
> mutex.acquire()
> try:
>     # now this stuff is locked
> finally:
>     mutex.release() # explicit is better than implicit

This is the way to do it today.  There's PEP 310 which, if accepted,
makes this at least shorter to write... (and PEP 310 references a
lengthy discussion about whether using __del__ like this is wise).

Cheers,
mwh

-- 
3. Syntactic sugar causes cancer of the semicolon.
  -- Alan Perlis, http://www.cs.yale.edu/homes/perlis-alan/quotes.html


From christoph at mmc-startup.com  Thu Jan 15 15:01:36 2004
From: christoph at mmc-startup.com (Christoph Becker-Freyseng)
Date: Thu, 15 Jan 2004 21:01:36 +0100
Subject: needed PyXPCOM tutorial.
In-Reply-To: <425cc8d1.0401150908.287de0d8@posting.google.com>
References: <425cc8d1.0401150908.287de0d8@posting.google.com>
Message-ID: <4006F1A0.9050801@mmc-startup.com>

mir nazim wrote:

>hi 
>i m in need of a PyXPCOM tutorial. it should explain using python
>(instead of JavaScript) for creating apps. if any body can point me to
>some web resources or a printed book .
>thankz
>  
>
Maybe those will help (check 3! They've some more links)

http://lxr.mozilla.org/seamonkey/source/extensions/python/xpcom/
http://www.mozilla.org/catalog/architecture/xpcom/pyxpcom/
http://pygecko.sourceforge.net/
http://xul.sourceforge.net/
http://luxor-xul.sourceforge.net/
http://www.thomas-schilz.de/MozPython/    (the downloads-dirctory 
contains installers for upgrading Mozilla to Python-Interpretability)



Christoph Becker-Freyseng




From Pieter.Claerhout at Creo.com  Tue Jan 13 09:30:27 2004
From: Pieter.Claerhout at Creo.com (Pieter Claerhout)
Date: Tue, 13 Jan 2004 15:30:27 +0100
Subject: Make a function call itself after set amount of time
Message-ID: <490316A24CC5D411ACD700B0D078F7F003915D86@cseexch01.cse.creoscitex.com>

Bart,

have a look at the TaskKit subpart of WebWare
(http://webware.sourceforge.net/).

You can use it run periodic tasks.

Pieter

Creo
pieter claerhout | product support prinergy | tel: +32 2 352 2511 |
pieter.claerhout at creo.com | www.creo.com

IMAGINE CREATE BELIEVE(tm)


-----Original Message-----
From: Bart Nessux [mailto:bart_nessux at hotmail.com] 
Sent: 13 January 2004 15:24
To: python-list at python.org
Subject: Make a function call itself after set amount of time


How do I make a function call itself every 24 hours. Also, is there a 
way to start the program automatically w/o depending on the OS functions 
like 'Task Scheduler' or 'Start Up Items'... this is on Windows 2k and 
xp. Below is an example of what I'm trying to do.

TIA

def ipconfig_email():
    from email.MIMEText import MIMEText
    import smtplib
    import time
    import os

    u = "user name"		#Change This to user's name.
    f = "my-email-addy"
    t = "my-email-addy"

    fp0 = os.popen("ipconfig /all", "r")
    fp1 = os.popen("psinfo -d -s", "rb")
    msg = MIMEText(fp0.read() + fp1.read())
    fp0.close()
    fp1.close()

    msg["Subject"] = "%s's IPconfig Report" % u
    msg["From"] = f
    msg["To"] = t

    h = "my.smtp.server"
    s = smtplib.SMTP(h)
    s.sendmail(f, t, msg.as_string())
    s.quit()
    time.sleep(86400)	#24 hour sleep
    HOW_DO_I_CALL_THE_FUNCTION_AGAIN?

ipconfig_email()

-- 
http://mail.python.org/mailman/listinfo/python-list



From theller at python.net  Fri Jan 30 13:14:52 2004
From: theller at python.net (Thomas Heller)
Date: Fri, 30 Jan 2004 19:14:52 +0100
Subject: newbie py2exe difficulty
References: <PsoSb.329649$JQ1.232982@pd7tw1no>
	<mailman.1028.1075452591.12720.python-list@python.org>
Message-ID: <k7398fs3.fsf@python.net>

"Mike C. Fletcher" <mcfletch at rogers.com> writes:

[a great detailed explanation how to run the py2exe setup script snipped]

Mike, I took the freedom to enter this text in the py2exe wiki:

<http://starship.python.net/crew/theller/moin.cgi/RunningSetup>

Thanks,

Thomas


From mcherm at mcherm.com  Thu Jan  8 08:15:09 2004
From: mcherm at mcherm.com (Michael Chermside)
Date: Thu,  8 Jan 2004 05:15:09 -0800
Subject: PRE-PEP: new Path class
Message-ID: <1073567709.3ffd57dda8cb0@mcherm.com>

> > Another Point:
> > Should Path be immutable like string?
> 
> I have though about this, too. It should certainly not be fully mutable,
> because if a path changes, it changes. But maybe we could have a
> .normalise_inplace() which mutates the Path? What consequences would
> this have for hashability?
> 
> I like paths to be hashable. so they probably should be immutable.

I agree... paths should be immutable.

Instead of .normalize_inplace() which changes the behavior of the
Path, how about .get_normalized_string() (please find a better name)
which allows access to the normalized version without mutating the
Path object? (Or perhaps it should be .get_normalized_Path()... I'm
not sure.)

-- Michael Chermside




From amy-g-art at cox.net  Tue Jan 27 12:45:16 2004
From: amy-g-art at cox.net (Amy G)
Date: Tue, 27 Jan 2004 09:45:16 -0800
Subject: Too many indices
References: <mailman.790.1075105274.12720.python-list@python.org>
Message-ID: <GsxRb.2064$P17.596@fed1read03>

Posting your script would be helpful.

"satish" <skchim0 at engr.uky.edu> wrote in message
news:mailman.790.1075105274.12720.python-list at python.org...
Hi all,

I tried to run a small script when I got the following IndexError. Can
someone
help me in explaining this error ?

Traceback (most recent call last):
  File "satish.py", line 36, in ?
    mesh = Mesh(db['x'], db['y'], db['z'])
  File "/usr/lib/python2.2/site-packages/LESTool/CFD_database.py", line 208,
in __getitem__
    self.readCoords()
  File "/usr/lib/python2.2/site-packages/LESTool/CFD_database.py", line 239,
in readCoords
    self.data[cgns.x] = MA.array(self.data['coordinates'][0,:,:,:])
IndexError: too many indices

Thanks

Regards,
Satish


-- 
SATISH KUMAR CHIMAKURTHI
Graduate Teaching Assistant
CFD GROUP
UNIVERSITY OF KENTUCKY
LEXINGTON
KENTUCKY - 40508
Email: skchim0 at engr.uky.edu
Mobile: 859-312-8425




From aaron at reportlab.com  Sun Jan 11 20:12:46 2004
From: aaron at reportlab.com (Aaron Watters)
Date: 11 Jan 2004 17:12:46 -0800
Subject: Databases: Which one's right for me?
References: <mailman.284.1073847641.12720.python-list@python.org>
Message-ID: <9a6d7d9d.0401111712.22a74be7@posting.google.com>

"Tim Peters" <tim.one at comcast.net> wrote in message news:<mailman.284.1073847641.12720.python-list at python.org>...
> [Aaron Watters]
> > BTW, I would like to see somewhere an explanation of how
> > ZODB concurrency control and recovery work.  Please inform if
> > there is some information.  I'm not encouraged by the fact that
> > in what documentation I can find the definitions are not the
> > standard ones.
> 
> Of course you're much more likely to get a useful discussion of this on a
> ZODB list, like <mailto:zodb-dev at zope.org>.
> 
> "The standard" ones aren't all that standard.  ANSI SQL-92 defines multiple
> isolation levels, and they've been (I think) fairly critiqued as  incomplete
> and partly ambiguous; e.g.,
> 
>     A Critique of ANSI SQL Isolation Levels
>     Hal Berenson, et al.
>     http://citeseer.nj.nec.com/berenson95critique.html

Some SQL isolation levels are hacks to allow long running transactions,
etcetera.  If you keep to the strictest isolation level you get the
classical behaviour which has been studied and elaborated by many very
smart people over the last several decades and which is very well
understood.

Does ZODB support the strictest isolation levels?  If so how?  If not
what does it support exactly?
   -- Aaron Watters
===
We'll make our way across the galaxy
And head back home on the L.I.E.
   -- "Laser show", Fountains of Wayne


From aaron at reportlab.com  Sun Jan 11 12:58:16 2004
From: aaron at reportlab.com (Aaron Watters)
Date: 11 Jan 2004 09:58:16 -0800
Subject: Databases: Which one's right for me?
References: <4378fa6f.0401091717.1ae63541@posting.google.com>
	<qu7000dot866j3qd9hi6hgkh4np5nuq7fa@4ax.com>
Message-ID: <9a6d7d9d.0401110958.693e30d1@posting.google.com>

Rene Pijlman <reply.in.the.newsgroup at my.address.is.invalid> wrote in message news:<qu7000dot866j3qd9hi6hgkh4np5nuq7fa at 4ax.com>...
> Marc:
> >Basically I need a db that will travel with my executable script and
> >faithfully store and edit the data needed in that script.
> 
> Have a look at ZODB.
> 
> Introduction:
> http://www.python.org/workshops/2000-01/proceedings/papers/fulton/zodb3.html

BTW, I would like to see somewhere an explanation of how
ZODB concurrency control and recovery work.  Please inform if
there is some information.  I'm not encouraged by the fact that
in what documentation I can find the definitions are not the
standard ones.  For example

zodb.pdf:
"""
Isolation means that two programs or threads running in two different 
transactions cannot see each other's changes until
they commit their transactions.
"""
Database System Concepts, 4th edition, Silberchatz, Korth, Sudarshan p.566
"""
Isolation: Even though multiple transactions may execute concurrently
the system guarantees that for every pair of transactions Ti and Tj
it appears to Ti that either Tj finished executing before Tj started
or Tj started executing after Ti finished.
"""
The zodb definition is far weaker than the standard one (at least in
this document).  Maybe they really meant something different?

For an example of what I'm looking for please see the xsdb documentation
  http://xsdb.sourceforge.net/concurrency.html
or the gadfly documentation
  http://gadfly.sourceforge.net/recover.html

  -- Aaron Watters
===
...and somewhere in the eprom
that hacker he switched context
but in is cryptic code I found
a statement I could parse:
you got to know when to kludge up
know when to core dump
know when to single step
know when to "run"
you never count your source lines
while your sittin' at the keyboard
there'll be time enough for metrics
when the hackings done.
  The Hacker (with apologies to The Gambler)


From fredrik at pythonware.com  Thu Jan 29 19:27:58 2004
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Fri, 30 Jan 2004 01:27:58 +0100
Subject: Color count in PIL
References: <2ec1bc1c.0401271443.15f56742@posting.google.com>
Message-ID: <bvc8ek$e5j$1@sea.gmane.org>

"Larry" <wrbt at email.com> wrote:

> I've been walking up, down, and around instances in the object model
> of PIL trying to figure out how to easily calculate how many unique
> colors are used in an image, specifically a bitmap (mode "P"). Am I
> missing something?

colors = len(filter(None, im.histogram()))

</F>






From bkelley at wi.mit.edu  Fri Jan  9 23:06:16 2004
From: bkelley at wi.mit.edu (Brian Kelley)
Date: Sat, 10 Jan 2004 04:06:16 GMT
Subject: Python And Internationalization maybe a pre-pep?
In-Reply-To: <3FFF36A1.40303@v.loewis.de>
References: <3ffede43$0$563$b45e6eb0@senator-bedfellow.mit.edu>
	<3FFF36A1.40303@v.loewis.de>
Message-ID: <YSKLb.10550$5V2.17781@attbi_s53>

Martin v. Loewis wrote:
> Brian Kelley wrote:
> 
>> Essentially, everything looks like this
>> _("STRING")
>>
>> I got to thinking that this is python, I shouldn't have to do this.  
>> Why not have a mechanism to capture this data at compile time?
> 
> 
> Precisely because it is Python you should have to do this. The language
> that looks like line noise is a different one...
> 
> Explicit is better than implicit.
> Simple is better than complex.

I suppose we see a little differently here.  What I am suggesting I 
think is still explicit, the major difference is that when the code is 
compiled the internationalization tables are generated.

I don't see too much difference between using
_("STRING")

to indicate a string to be internationalized and
i"STRING"

Except that the later will be automatically noticed at compile time, not 
run-time.

I have also played with

international("STRING")

>> if a value exists in the international table for 
>> the given string, the string is converted to the current locale.
> 
> Using what textual domain?
> 
I am using the same mechanism as gettext but tying it into the "import 
locale" mechanism.

>> Now, I don't know if this is a good idea or not, and I may be 
>> reinventing some wheels, but it has some appealing characteristics and 
>> ties in with the gettext system really well.  Of course, I'm a bit 
>> leary with changing the python parser but I was uncomfortable with the 
>> two step process of writing the code, then passing it through a source 
>> analyzer so that it could be internationalized.
> 
> What is your problem with that technique? You have to extract the
> strings *anyway*, because the translators should get a list of the
> strings to translate, and not need to worry with your source code.

I think this happens fine in both cases.  The mechanism for 
internationalizing with wxPython just didn't feel, well, pythonic.  It 
felt kind of tacked into place.  Of course I feel the same way about 
most C macros :)

>> So, am I being silly, redundant or just plain different?
> 
> I do wonder what kind of application are you looking at. How
> many strings? How many different translators? How often do
> the strings change? Are the strings presented to the immediate
> user of the application sitting in front of the terminal where
> the application is running, or are there multiple simultaneous
> accesses to the same application, e.g. through a Web server?

The number of strings doesn't really matter I think as long as you can 
automatically generate the ones that need to be translated.  Both 
mechanisms do this.

I hadn't previously thought about multiple simultaneous users but this 
could fit in nicely.  After some experimentation with the string 
classes, it turns out that as long as the __repr__ of the string stays 
unchanged, i.e. in this case the original english version, then the 
__str__ of a string (the locale specific changes) can change willy-nilly 
and not affect things like dictionaries and class name lookups.

Perhaps I am optimizing the wrong end of the stick.  I could change the 
gettext _("STRING") functionality to (mostly) do what I want without the 
need for parser changes.  However, I was entranced by the thought of 
writing (in normal python)

raise Exception(i"You shouldn't reach this exception at line %s"%line)

and automatically generating the translation files at compile time.  Of 
course this is different than

raise Exception(_("You shouldn't reach this exception at line %s"%line))

which generates them at run-time or by using the source code-analyzer. 
I personally think the first one is slightly more explicit.  Perhaps

raise Exception(
   internationalize("You shouldn't reach this exception at line %s"%line)
)

would be better.

Compile-time generation just feels safer to me.  The code-analyzer might 
miss special cases and what not, but if it is generated at compile time 
it will work all the time.

I suppose that there really isn't much difference in the long run as 
long as tools exist that make these translations relatively easy but I 
can't quite shake the thought of trying to teach my brother, a 
biologist, how to enable localization in his code in an easy manner.

Anyway, you have made good points and maybe all I need are some better 
integrated tools for localizing my applications.

Since you brought it up, how does gettext handle multiple users?  Does 
each user get a different gettext library (dll) instance?

Brian



From reply.in.the.newsgroup at my.address.is.invalid  Tue Jan 13 13:45:18 2004
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Tue, 13 Jan 2004 19:45:18 +0100
Subject: System calls over network
References: <ed58f15a.0401130950.237a0ea1@posting.google.com>
Message-ID: <i0f800lnqe45klh3fa6vfjlkvr28h0rgnk@4ax.com>

Gabriel Leblanc:
>I am wondering if there's an easy way to do a system call to a file
>that resides on the network.  Say for example I would like to call the
>batch file which is located at
>
>\\ComputerName\file.bat
>
>I tried :
>
>>>> import os
>>>> os.popen("\\ComputerName\file.bat")

System calls, batch files, UNC paths and pipes are different things. What
exactly are you trying to acomplish? And on what platform?

Also, you should use raw strings to prevent the double backslash from
being escaped to a single backslash:

    r"\\ComputerName\file.bat"

-- 
Ren? Pijlman


From skip at pobox.com  Tue Jan 20 16:04:20 2004
From: skip at pobox.com (Skip Montanaro)
Date: Tue, 20 Jan 2004 15:04:20 -0600
Subject: Do (USA) Python conferences require a coast?
In-Reply-To: <6b50e1-goo.ln1@jowls.lairds.org>
References: <6b50e1-goo.ln1@jowls.lairds.org>
Message-ID: <16397.38868.283539.483276@montanaro.dyndns.org>


    Kyler> Even the Plone conference (New Orleans) was on a coast.  Do
    Kyler> Python users always have to be "on edge"?

I'd vote for Chicago.  Of course, technically speaking we're on a coast
also.  It should be just about the easiest city to get to from anywhere in
the US though.

Skip



From adalke at mindspring.com  Thu Jan  1 20:53:23 2004
From: adalke at mindspring.com (Andrew Dalke)
Date: Fri, 02 Jan 2004 01:53:23 GMT
Subject: Test if IDLE is a mature program
References: <ppKdnTEKUp3Hr2-iRVn-jg@comcast.com><7ti4vvoburp4k4o4a0v5p4shae7o5uhotb@4ax.com><edqdnVxBL_Q3fG-iRVn-gg@comcast.com><99dce321.0312311130.5b7c7c8a@posting.google.com><N6OdndTvJqSstW6iRVn-gg@comcast.com><3ff49f0e.776954150@news.blueyonder.co.uk>
	<mailman.18.1072997292.12720.python-list@python.org>
Message-ID: <na4Jb.15580$lo3.7942@newsread2.news.pas.earthlink.net>

Dave Harris:
> How many of you will fess up to have written a script named
> 'test' and were puzzled when it did not run??
>
> UNIX and sh fail to be mature by the proposed measure. How much longer
till
> they 'come of age'?

Or tried to save to a file named "prn" or "aux" under MS Windows  ;)

                    Andrew
                    dalke at dalkescientific.com




From richie at entrian.com  Wed Jan 21 07:58:26 2004
From: richie at entrian.com (Richie Hindle)
Date: Wed, 21 Jan 2004 12:58:26 +0000
Subject: Pyrex without Python (was Re: calling Pyrex results from C)
In-Reply-To: <j46dnXzUvaFT6ZPdRVn-hg@speakeasy.net>
References: <20040121005749.GA27424@unpythonic.net>
	<400DD5DE.90405@prescod.net>
	<mailman.567.1074654944.12720.python-list@python.org>
	<j46dnXzUvaFT6ZPdRVn-hg@speakeasy.net>
Message-ID: <qits00l0f9g87rifcn5eh07ilus0ksl15n@4ax.com>


[Andrew]
> I just use the compiler package to get an AST for a chunk of Python code
> [...]
> The nice thing is that the code generator knows the C-level types of
> variables

How does it know the types?  Pyrex adds additional syntax to do this, but
if you're using the plain vanilla compiler package then presumably you're
doing something else?

-- 
Richie Hindle
richie at entrian.com




From csgcsg39 at hotmail.com  Fri Jan 30 10:47:54 2004
From: csgcsg39 at hotmail.com (C GIllespie)
Date: Fri, 30 Jan 2004 15:47:54 -0000
Subject: Simple list question
Message-ID: <bvdub7$ksc$1@ucsnew1.ncl.ac.uk>

Dear all,

I have a list something like this: ['1','+','2'], I went to go through and
change the numbers to floats, e.g. [1,'+',2]. What's the best way of doing
this? The way I done it seems wrong, e.g.

nod=['1','+','2']
i=0
while i<len(nod):
    if nod[i] !='+' or nod[i] !='-' or nod[i]!='*' or nod[i] != '/' or
nod[i] != '(' or nod[i] != ')':
        nod[i] = float(nod[i])
    i = i + 1

Comments?

Thanks

Colin




From irmen at -NOSPAM-REMOVETHIS-xs4all.nl  Fri Jan  2 16:01:04 2004
From: irmen at -NOSPAM-REMOVETHIS-xs4all.nl (Irmen de Jong)
Date: Fri, 02 Jan 2004 22:01:04 +0100
Subject: how to import a module dynamically
In-Reply-To: <fWkJb.29708$xU1.18377@fe1.texas.rr.com>
References: <fWkJb.29708$xU1.18377@fe1.texas.rr.com>
Message-ID: <3ff5dc88$0$318$e4fe514c@news.xs4all.nl>

Randall Smith wrote:
> How do I import a module when given the module name as input?


> import modname

exec "import "+your_module_name


> from modname import *

exec "from %s import %s" % (your_module_name, your_imported_symbol)

HTH,
Irmen.



From davidb at mcs.st-and.ac.uk  Sun Jan 18 16:16:11 2004
From: davidb at mcs.st-and.ac.uk (David Boddie)
Date: 18 Jan 2004 13:16:11 -0800
Subject: Fw: PDF library for reading PDF files
References: <mailman.464.1074430854.12720.python-list@python.org>
Message-ID: <4de76ee2.0401181316.322922ab@posting.google.com>

"Peter Galfi" <galfip at freestart.hu> wrote in message news:<mailman.464.1074430854.12720.python-list at python.org>...

> I am looking for a library in Python that would read PDF files and I 
> could extract information from the PDF with it. I have searched with 
> google, but only found libraries that can be used to write PDF files.
> 
> Any ideas?

I quickly searched back through Google, but I knew exactly what I was
looking for: ;-)

http://groups.google.com/groups?selm=4de76ee2.0311251258.2bcf8bea%40posting.google.com

The page referred to is here:

http://www.boddie.org.uk/david/Projects/Python/pdftools/

The module is very much a "work in progress". You can probably get
some text and bitmap images out of a few documents, but that's
probably all you can expect unless you want to improve it (and
submit patches).

Good luck!

David


From jcarlson at uci.edu  Wed Jan 21 22:00:04 2004
From: jcarlson at uci.edu (Josiah Carlson)
Date: Wed, 21 Jan 2004 19:00:04 -0800
Subject: Assignment to slice
References: <mailman.604.1074712550.12720.python-list@python.org>
	<20040121130236.D8E3.JCARLSON@uci.edu>
	<mailman.619.1074727680.12720.python-list@python.org>
Message-ID: <20040121185145.C648.JCARLSON@uci.edu>


All 'different' language features are 'unusual' until people get used to
them.  While you are currently saying, "I can't believe people don't
think this is strange", the rest of us got over it, and may even be
using the feature to get the job done.

Hell, I think that Perl variables are f-ing weird.  In the dozen
languages I've learned over the years, Perl is the only one where you
have to say hey, you this variable I'm accessing now, it is a scalar,
not a string.  What the hell is that?  On the other hand, Perl users
have gotten used to it, and don't think it is strange.

The real difference is that I'm not hanging out on Perl newsgroups or
mailing lists saying, "Dude, this variable thing is wack" (this actually
has more to do with the fact that I don't much like Perl, and don't use
it, than anything else).  Get used to slices working the way they do, it
is not likely to change anytime soon.

 - Josiah


> I'm just surprised that nobody thinks it's unusual. 
> 
> >>> x = []
> >>> x[4] = 5  
> Python says "Wrong! Can't do that! I'm quitting now!"
> >>> x = [] 
> >>> x[4:5] = [1,2,3,4,5] 
> Python says "Ok. Cool. Those indices don't exist in x so I'll just stick
> your list at the beginning,
> and the indices you used in the slice have nothing to do with where the
> elements end up,
> since they don't exist in the list anyway."
> 
> To me that doesn't look much different than if python were to do this:
> (not real code obviously)
> <fiction>
> >>> x = []
> >>> x[4] = 5
> >>> x
> [5]
> Python says "Well, x[4] doesn't exist so you must have meant x[0]."
> <fiction>
> 
> That would make no sense. So why does it make sense to do that same
> exact thing if you're 
> assigning to a slice, instead of an element? 
> 
> That's what I see as inconsistent; not that python does not behave just
> like perl. I'm sure that
> a little more time will reveal this 'inconsistency' as a shortcoming in
> the wiring of my brain, and
> not a weird python idiosyncrasy. It's cool to hear other people's take
> on it.
> Thanks alot.
> Rich
> 
> 
> 
> 
> 
> 
> 
> On Wed, 2004-01-21 at 16:09, Josiah Carlson wrote:
> 
> > > Instead python will just tack stuff on to the front of
> > > the array. Which, I still believe, is totally
> > > inconsistent. But what do I know? I have about 5
> > > minutes of python experience.
> > 
> > > Oh well. Maybe my problem is that I'm using perl as my
> > > model of consistency. Plus, it's a minor issue anyway.
> > > I just need to be aware of it, and not try to write
> > > perl code in python. I need to learn to write python
> > > code in python.
> > 
> > There are a few choices that one can make when allowing slice reading
> > and writing in sequences.  Python made one: never cause an exception for
> > integer arguments, and certain indices map to the same location.  Perl
> > made another: extend the sequence if necessary to fill it out.
> > 
> > Both are consistent and predictable.  Python does it one way, Perl does
> > it another.  Heck, Python has variable definitions that are done one way,
> > Perl has variable definitions that are done another.  They were choices
> > made during the creation that fit a paradigm.
> > 
> > Expecting Python to behave like Perl is like expecting your mother to
> > pee standing up; without alteration, it's not gonna happen.
> > 
> >  - Josiah



From eurleif at ecritters.biz  Thu Jan 22 19:19:47 2004
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Fri, 23 Jan 2004 00:19:47 GMT
Subject: My Python cannot find wxPython
In-Reply-To: <692feddd.0401221457.18d40480@posting.google.com>
References: <692feddd.0401221457.18d40480@posting.google.com>
Message-ID: <DMZPb.247$af7.184518@newshog.newsread.com>

Equis Uno wrote:
> Does Python have a concept like PATH or CLASSPATH?

Yes, the PYTHONPATH environment variable.



From tim.golden at viacom-outdoor.co.uk  Mon Jan 26 11:53:12 2004
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Mon, 26 Jan 2004 16:53:12 -0000
Subject: Py2exe and WMI module
Message-ID: <F1921F85572CB04D9F55B14BDC76B3E443466F@tdi_nt9.internal.viacom-outdoor.co.uk>

>From: nekiv at start.no [mailto:nekiv at start.no]
>
>I'm having a problem when I try to make a standalone installation of a
>Python program using Tim Goldens WMI-module.  The py2exe produce the
>exe-file as expected, but it fails to execute.

Well, I've tried to play with wmi-py2exe myself for the first
time, with mixed results. If I understand the idea, what you
do is this:

Use the makepy generator to generate gen_py support for the
Microsoft WMI 1.1 Scripting Library. This will result in a
proxy module in %TEMP%\gen_py\2.3 (for recent win32all releases)
called something like:

565783C6-CB41-11D1-8B02-00600806D9B6x0x1x1.py

Note the x0x1x1 at the end.

You then need a setup script such as this one:

<setup.py>
from distutils.core import setup
import py2exe
      
setup (
  console=["wmi_test.py"],
  options = {
    "py2exe": {
      "typelibs": [('{565783C6-CB41-11D1-8B02-00600806D9B6}', 0, 1, 1)]
    }
  }
)
</setup.py>

That "typelibs" line is made up from the proxy string 
effectively split like this:

"565783C6-CB41-11D1-8B02-00600806D9B6x0x1x1".split ("x")

It's not exactly that, but you can work it out for yourself. In
fact, the first bit is the CLSID, and the others are the LCID,
major and minor numbers from within
565783C6-CB41-11D1-8B02-00600806D9B6x0x1x1.py

<... snipped from Python proxy module ...>

CLSID = IID('{565783C6-CB41-11D1-8B02-00600806D9B6}')
MajorVersion = 1
MinorVersion = 1
LibraryFlags = 8
LCID = 0x0

</snip>

Given a module, say, wmi_test.py, which imports the wmi module,
you can now run

c:\python23\python setup.py py2exe

in the usual way to create an exe.

After that, you're even more on your own than you were before.

TJG



________________________________________________________________________
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From jsteve17 at tampabay.rr.com  Thu Jan 15 10:47:03 2004
From: jsteve17 at tampabay.rr.com (JeffS)
Date: Thu, 15 Jan 2004 15:47:03 GMT
Subject: QT usage confusion
References: <40069912$0$251$4d4ebb8e@news.nl.uu.net>
Message-ID: <XByNb.42288$I05.844969@twister.tampabay.rr.com>

Guyon Mor?e wrote:


> 
> am I wrong?
> please tell me I'm wrong.

You're not wrong although there have been persistent rumors that
Trolltech will (real soon now) provide a free version of Qt
for Windoze.  I wouldn't hold my breath.

Regards,
JeffS



From ville.spamstermeister.vainio at thisisspamprotectiontut.finland  Tue Jan 20 15:58:21 2004
From: ville.spamstermeister.vainio at thisisspamprotectiontut.finland (Ville Vainio)
Date: 20 Jan 2004 22:58:21 +0200
Subject: New to Python: my impression v. Perl/Ruby
References: <mailman.493.1074484056.12720.python-list@python.org>
	<bui91p01uu6@enews2.newsguy.com>
Message-ID: <du71xpue3rm.fsf@mozart.cc.tut.fi>

>>>>> "Phil" == Phil Tomson <ptkwt at aracnet.com> writes:

    Phil> Different strokes for different folks, I guess.  I remember
    Phil> that one of the first things I saw about Ruby was that even
    Phil> interger literals were objects that can receive messages and
    Phil> thinking how wonderful that was.  As you say, you're not

Ints are objects in python too:

>>> a=1
>>> a.__lshift__(1)
2

Though "sending messages" to int literals is a syntax error.

    Phil> 10.times do something end

    Phil> is somehow so clear.  It's almost zenlike.

It's cute and fun to write, but less cute for people who have to read
lots of such code in short time. I have a soft spot for such style
also; I kinda like Python's "\n".join(["foo","bar"]), even if most
seem to consider it a wart for readability reasons.

-- 
Ville Vainio   http://tinyurl.com/2prnb


From cookedm+news at physics.mcmaster.ca  Thu Jan 15 12:17:26 2004
From: cookedm+news at physics.mcmaster.ca (David M. Cooke)
Date: Thu, 15 Jan 2004 12:17:26 -0500
Subject: Can MayaVi visualize 3D functions in an unstructured grid ?
References: <11d4728b.0401150613.1bfb4ca3@posting.google.com>
Message-ID: <qnkvfndnnbt.fsf@arbutus.physics.mcmaster.ca>

At some point, arian.novruzi at mathstat.uottawa.ca (A. Novruzi) wrote:

> Hi, 
>
> I am looking for a free 3D visualization software, running in Linux,
> and able to visualize 3D functions in nonstructured mesh (basically,
> my mesh is a set of thetraheders used for some 3D FE computations).
>
> Can anyone confirm that indeed MayaVi can visualize 3D functions in
> nonstructured mesh? I went through the manuals but I didn't find that
> MayVi can do so.

It should. You'll have to write your function to a file, in VTK data
format, which supports unstructured grid data.
http://mayavi.sourceforge.net/docs/guide/x404.html

-- 
|>|\/|<
/--------------------------------------------------------------------------\
|David M. Cooke
|cookedm(at)physics(dot)mcmaster(dot)ca


From try_vanevery_at_mycompanyname at yahoo.com  Thu Jan 15 00:11:40 2004
From: try_vanevery_at_mycompanyname at yahoo.com (Brandon J. Van Every)
Date: Wed, 14 Jan 2004 21:11:40 -0800
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
	<K_YMb.10994$9k7.204413@news.xtra.co.nz>
	<bu1qq3$cu440$1@ID-207230.news.uni-berlin.de>
	<n22Nb.11299$9k7.210522@news.xtra.co.nz>
	<bu2pgs$d123a$1@ID-207230.news.uni-berlin.de>
	<4004EC9E.1E2E2893@alcyone.com>
	<23891c90.0401140223.344b22af@posting.google.com>
	<100bbb6kj9m03a4@corp.supernews.com>
	<bu4cdk$cv09p$1@ID-207230.news.uni-berlin.de>
	<1AjNb.8936$1e.894@newsread2.news.pas.earthlink.net>
Message-ID: <bu56oq$d62os$1@ID-207230.news.uni-berlin.de>


"Andrew Dalke" <adalke at mindspring.com> wrote in message
news:1AjNb.8936$1e.894 at newsread2.news.pas.earthlink.net...
> Brandon J. Van Every:
> > Is there something fundamentally *wrong* with recognizing how useless
> people
> > are to your purposes?
>
> Nope.  But if you blabber it to everyone in the manner you have
> then when you do need someone else's help you're less likely to
> get it.

Hello, *what* planet are you on?  You think there's some crowd of people out
there just waiting to be useful to me?  There isn't.  That's what I've just
taken 6 months to determine.

> It's made even worse when you make claims related to your
> profession (like "Even 12 years ago, "Computer Graphics: Principles
> and Practice" didn't teach texture mapping.

It didn't.  I have my copy still, and there is no discussion of texture
mapping algorithms in it.  It was considered "an advanced subject."

> Along came DOOM.") which is proveably false for several reasons

Whatever dude.  I could care less about such chronologies.  So, why are you
here then?  Why are you wasting our time, talking about the finer points of
my personal history?  I'm here because I just watched Return Of The King,
just installed a modem, and just finished a few slices of pizza.  <BUUUURP!>

>
(http://groups.google.com/groups?selm=aemtb.1153%24sb4.720%40newsread2.news.
> pas.earthlink.net&oe=UTF-8&output=gplain )
> because then people tend to remind others of your follies to show
> that your knowledge is less than you think it is.

You are here out of a need to remind myself and others of my knowledge or
lack thereof?  Wow, what an important job.  Hats off to you.

-- 
Cheers,                     www.indiegamedesign.com
Brandon Van Every           Seattle, WA

20% of the world is real.
80% is gobbledygook we make up inside our own heads.



From try_vanevery_at_mycompanyname at yahoo.com  Wed Jan 14 17:05:22 2004
From: try_vanevery_at_mycompanyname at yahoo.com (Brandon J. Van Every)
Date: Wed, 14 Jan 2004 14:05:22 -0800
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
	<K_YMb.10994$9k7.204413@news.xtra.co.nz>
	<bu1qq3$cu440$1@ID-207230.news.uni-berlin.de>
	<n22Nb.11299$9k7.210522@news.xtra.co.nz>
	<bu2pgs$d123a$1@ID-207230.news.uni-berlin.de>
	<NlhNb.11982$9k7.221029@news.xtra.co.nz>
Message-ID: <bu4dpe$dlvrs$1@ID-207230.news.uni-berlin.de>


"Peter Ashford" <me at here.there.com> wrote in message
news:NlhNb.11982$9k7.221029 at news.xtra.co.nz...
> >>
> >>Why do you think OS developers owe you any kind of value at all?
> >
> > I don't.  But that's not going to stop me from denigrating them for
being
> > incapable of fulfillng the kinds of projects I have in mind.
>
> That's like criticising a high class restraunt for not serving burgers.
>   If they don't propose to solve your particular needs, criticising them
> for not doing so is stupid and redundant.

Referring to Bent's astute post, it's more like criticizing an OSS
restaurant that says it serves a lot of things, but in fact doesn't.
"Cross-platform, so long as your platform is Linux."

-- 
Cheers,                     www.indiegamedesign.com
Brandon Van Every           Seattle, WA

20% of the world is real.
80% is gobbledygook we make up inside our own heads.



From news at scphillips.co.uk  Wed Jan 14 08:58:01 2004
From: news at scphillips.co.uk (Stephen C Phillips)
Date: Wed, 14 Jan 2004 13:58:01 +0000
Subject: removing data from the profiler Stats object
Message-ID: <pan.2004.01.14.13.58.01.394134.15773@scphillips.co.uk>

Hi,
	I have just started using the Python profiler and cannot get
the output I want.  Once I have profiled a piece of code and saved the
data to a file, I can load it in using the pstats module.  I have found
that 96% of my program's time is spent in three object methods (and their
callees) but want to know what the other 4% is.

I can do this:

p = pstats.Stats('profile.data')
p.print_callees('expensive_method1')
p.print_callees('expensive_method2')
p.print_callees('expensive_method3')

Which makes me think that the data must be held in a tree of some sort,
but what I want is to prune those branches from the tree and see the rest
of the data:

p.print_stats(without expensive_method[123])

I suppose I could roughly get this data by changing the three expensive
methods to immediately return some dummy data, but thought it ought to be
possible to interrogate the Stats object to get the answer.

The other 4% may also include calls to the same functions as in the 96% so
it is not just a matter of looking at the data for particular functions. 
I know it seems silly to be chasing after 4% of the profile but it is
important in this case.

Thanks.

Stephen Phillips.


From reply.in.the.newsgroup at my.address.is.invalid  Wed Jan  7 06:12:26 2004
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Wed, 07 Jan 2004 12:12:26 +0100
Subject: Windows service in Python
References: <mailman.174.1073470107.12720.python-list@python.org>
Message-ID: <7bqnvv4bkeu8go66eo6qefib8fr6vinq94@4ax.com>

Gandalf:
>Can anybody tell me how to write a windows service in Python? 

http://www.python.org/windows/win32/#NTServices

-- 
Ren? Pijlman


From exarkun at intarweb.us  Thu Jan 15 00:54:04 2004
From: exarkun at intarweb.us (Jp Calderone)
Date: Thu, 15 Jan 2004 00:54:04 -0500
Subject: I come not to bury C++, but to praise it...
In-Reply-To: <tqnNb.10910$ry6.2729@newssvr25.news.prodigy.com>
References: <mailman.337.1074032524.12720.python-list@python.org>
	<tqnNb.10910$ry6.2729@newssvr25.news.prodigy.com>
Message-ID: <20040115055404.GA20894@intarweb.us>

On Thu, Jan 15, 2004 at 03:03:53AM +0000, python newbie wrote:
> Are you against using C++ wrapped in a library such as wxWindows?  This
> library makes it pretty easy painless to write cross-platform stuff, but
> even on Windows alone, it beats MFC or the going price of Delphi.
> 

  Except when it causes memory corruption and segmentation faults :(

  Jp



From peter at engcorp.com  Thu Jan  8 10:02:02 2004
From: peter at engcorp.com (Peter Hansen)
Date: Thu, 08 Jan 2004 10:02:02 -0500
Subject: Why " ".some_string is often used ?
References: <Xns94698A5566736stefninnospamyahoofr@213.228.0.4>
	<vvqghojub1dl07@news.supernews.com>
Message-ID: <3FFD70EA.A6AF3CB8@engcorp.com>

John Roth wrote:
> 
> And I agree, it's not entirely obvious why it's a string
> method rather than a list method, since it operates on
> a list, not on a string. The only explanation that makes
> sense is that, as a list method, it would fail if the list
> contained something other than a string. That's still
> not very friendly, though.

One could about as easily argue (and I believe several have done
this quite well in the past, better than I anyway) that you are
actually operating on the *string*, not the list.  You are in
effect asking the string to act as a joiner for the elements in the
list, not asking the list to join itself using the specified
string.

At least, if you look at it that way, it might be easier to swallow.

-Peter


From rays at blue-cove.com  Thu Jan 29 19:03:59 2004
From: rays at blue-cove.com (Ray Schumacher)
Date: Thu, 29 Jan 2004 16:03:59 -0800
Subject: win32com - .ocx won't Dispatch...
Message-ID: <5.2.0.4.0.20040129160249.021eaff8@blue-cove.com>

Thanks Markus,

At 01:53 PM 1/29/2004, Markus Wankus wrote:
>Well - I have never seen "Catastrophic failure" before - but I have fought with win32com and know how frustrating it can be.  Also - I am NOT a COM guru - more of a trial and error guru ;o).

I'm a Jack-of-all-master-of-none Guru...

>Try the following:
>
>edr_mod = gencache.EnsureModule('{8AA34F82-95C9-11D3-8EB6-00C0DF2247CA}',0,3,5) 
>
>edr_obj = Dispatch("EDREUTLX.EDREUtlXCtrl.1")
>
>edr_obj.AboutBox()

>>> from win32com.client import *
>>> edr_mod = gencache.EnsureModule('{8AA34F82-95C9-11D3-8EB6-00C0DF2247CA}',0,3,5)
>>> edr_obj = Dispatch("EDREUTLX.EDREUtlXCtrl.1")
>>> edr_obj.AboutBox
<bound method _DEDREUtlX.AboutBox of <win32com.gen_py.EDRE Utility Control._DEDREUtlX instance at 0x10542896>>
>>> edr_obj.AboutBox()
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "C:\Python23\lib\site-packages\win32com\gen_py\8AA34F82-95C9-11D3-8EB6-00C0DF2247CAx0x3x5.py", line 34, in AboutBox
    return self._oleobj_.InvokeTypes(-552, LCID, 1, (24, 0), (),)
pywintypes.com_error: (-2147418113, 'Catastrophic failure', None, None)

Yep, the same. It sees the methods but fails when requesting them or properties.
A capture of the Python com Browser is attached, as well as the .py...

Thanks for your help, I did see one other post via Google about the issue, but it was not resolved.
Ray

>>From: Ray Schumacher 
>>To: Markus Wankus , python-list at python.org 
>>Subject: Re: win32com - .ocx won't Dispatch... 
>>Date: Thu, 29 Jan 2004 13:44:09 -0800 
>> 
>>At 12:12 PM 1/29/2004, Markus Wankus wrote: 
>> >Open the gen_py'd file 8AA34F82-95C9-11D3-8EB6-00C0DF2247CAx0x3x5.py, and do some searching.  You should be able to find an obvious main class related to what you are doing (I'm not sure what the .tlb is), and it will say in the comment or docstring that it is a ".", or whatever. 
>> 
>>Thanks Markus, 
>> 
>>The lines are from CoClassBaseClass: 
>>... 
>># This CoClass is known by the name 'EDREUTLX.EDREUtlXCtrl.1' 
>>class EDREUtlX(CoClassBaseClass): # A CoClass 
>>... 
>>That would be a helpful bit for the docs! 
>> 
>>So, the util class Dispatches, but all calls (properties and functions) give 'Catastrophic failure' 
>>Is this really some sort of types problem with this OCX? 
>>"pywintypes.com_error: (-2147418113, 'Catastrophic failure', None, None)" 
>> 
>>Thanks for the help, 
>>Ray 
>> 
>>Test run below, kitchen sink included: 
>> 
>>C:\projects\CV-Mini>python 
>>Python 2.3.3 (#51, Dec 18 2003, 20:22:39) [MSC v.1200 32 bit (Intel)] on win32 
>>Type "help", "copyright", "credits" or "license" for more information. 
>> >>> from win32com.client import * 
>> >>> util = gencache._GetModule('8AA34F82-95C9-11D3-8EB6-00C0DF2247CAx0x3x5') 
>> >>> gencache.GetGeneratedFileName('8AA34F82-95C9-11D3-8EB6-00C0DF2247CA',0,3,5) 
>>'AA34F82-95C9-11D3-8EB6-00C0DF2247Cx0x3x5' 
>> >>> gencache.MakeModuleForTypelib('8AA34F82-95C9-11D3-8EB6-00C0DF2247CAx0x3x5',0 
>>,3,5) 
>> >>> gencache.GetModuleForCLSID('8AA34F82-95C9-11D3-8EB6-00C0DF2247CA') 
>> >>> gencache.GetClassForCLSID('8AA34F82-95C9-11D3-8EB6-00C0DF2247CA') 
>> >>> gencache.GetModuleForProgID('EDREUTLX.EDREUtlXCtrl.1') 
>> 
>> >>> gencache.EnsureModule('{8AA34F82-95C9-11D3-8EB6-00C0DF2247CA}',0,3,5) 
>> 
>> >>> gencache.EnsureModule('EDREUTLX.EDREUtlXCtrl.1',0,3,5) 
>> >>> util = Dispatch("EDREUTLX.EDREUtlXCtrl.1") 
>> >>> util 
>> 
>> >>> gencache.EnsureDispatch(util) 
>> 
>> >>> 
>> >>> util = Dispatch("EDREUTLX.EDREUtlXCtrl.1") 
>> >>> util 
>> 
>> >>> # pop-up, no args 
>>... util.AboutBox() 
>>Traceback (most recent call last): 
>>   File "", line 2, in ? 
>>   File "C:\Python23\lib\site-packages\win32com\gen_py\8AA34F82-95C9-11D3-8EB6-00 
>>C0DF2247CAx0x3x5.py", line 34, in AboutBox 
>>     return self._oleobj_.InvokeTypes(-552, LCID, 1, (24, 0), (),) 
>>pywintypes.com_error: (-2147418113, 'Catastrophic failure', None, None) 
>> >>> # a property 
>>... util.Version 
>>Traceback (most recent call last): 
>>   File "", line 2, in ? 
>>   File "C:\Python23\lib\site-packages\win32com\client\__init__.py", line 451, in 
>>  __getattr__ 
>>     return self._ApplyTypes_(*args) 
>>   File "C:\Python23\lib\site-packages\win32com\client\__init__.py", line 445, in 
>>  _ApplyTypes_ 
>>     return self._get_good_object_(self._oleobj_.InvokeTypes(*((dispid, 0, wFlags 
>>, retType, argTypes) + args)), user, resultCLSID) 
>>pywintypes.com_error: (-2147418113, 'Catastrophic failure', None, None) 
>> >>> 
>> 
>> 
>
>
>----------
>The new <http://g.msn.com/8HMBENCA/2737??PS=>MSN 8: smart spam protection and 2 months FREE* 
-------------- next part --------------
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# -*- coding: mbcs -*-
# Created by makepy.py version 0.4.8
# By python version 2.3.3 (#51, Dec 18 2003, 20:22:39) [MSC v.1200 32 bit (Intel)]
# From type library 'EDREUtlX.ocx'
# On Wed Jan 28 16:25:02 2004
"""EDRE Utility Control"""
makepy_version = '0.4.8'
python_version = 0x20303f0

import win32com.client.CLSIDToClass, pythoncom
import win32com.client.util
from pywintypes import IID
from win32com.client import Dispatch

# The following 3 lines may need tweaking for the particular server
# Candidates are pythoncom.Missing and pythoncom.Empty
defaultNamedOptArg=pythoncom.Empty
defaultNamedNotOptArg=pythoncom.Empty
defaultUnnamedArg=pythoncom.Empty

CLSID = IID('{8AA34F82-95C9-11D3-8EB6-00C0DF2247CA}')
MajorVersion = 3
MinorVersion = 5
LibraryFlags = 10
LCID = 0x0

from win32com.client import DispatchBaseClass
class _DEDREUtlX(DispatchBaseClass):
	"""Dispatch interface for EDREUtlX Control"""
	CLSID = IID('{8AA34F83-95C9-11D3-8EB6-00C0DF2247CA}')
	coclass_clsid = IID('{8AA34F85-95C9-11D3-8EB6-00C0DF2247CA}')

	def AboutBox(self):
		return self._oleobj_.InvokeTypes(-552, LCID, 1, (24, 0), (),)

	def GetErrorName(self, ErrorCode=defaultNamedNotOptArg):
		# Result is a Unicode object - return as-is for this version of Python
		return self._oleobj_.InvokeTypes(13, LCID, 1, (8, 0), ((3, 0),),ErrorCode)

	def Query(self, QueryCode=defaultNamedNotOptArg, Param=defaultNamedNotOptArg):
		return self._oleobj_.InvokeTypes(14, LCID, 1, (3, 0), ((3, 0), (3, 0)),QueryCode, Param)

	def SelectDialog(self):
		return self._oleobj_.InvokeTypes(12, LCID, 1, (3, 0), (),)

	_prop_map_get_ = {
		"ADChannels": (6, 2, (3, 0), (), "ADChannels", None),
		"BoardName": (5, 2, (8, 0), (), "BoardName", None),
		"BoardType": (4, 2, (3, 0), (), "BoardType", None),
		"Counters": (11, 2, (3, 0), (), "Counters", None),
		"DAChannels": (7, 2, (3, 0), (), "DAChannels", None),
		"DIOPorts": (8, 2, (3, 0), (), "DIOPorts", None),
		"DriverVersion": (3, 2, (8, 0), (), "DriverVersion", None),
		"ManDate": (10, 2, (8, 0), (), "ManDate", None),
		"Revision": (9, 2, (3, 0), (), "Revision", None),
		"SerialNumber": (1, 2, (3, 0), (), "SerialNumber", None),
		"Version": (2, 2, (8, 0), (), "Version", None),
	}
	_prop_map_put_ = {
		"ADChannels" : ((6, LCID, 4, 0),()),
		"BoardName" : ((5, LCID, 4, 0),()),
		"BoardType" : ((4, LCID, 4, 0),()),
		"Counters" : ((11, LCID, 4, 0),()),
		"DAChannels" : ((7, LCID, 4, 0),()),
		"DIOPorts" : ((8, LCID, 4, 0),()),
		"DriverVersion" : ((3, LCID, 4, 0),()),
		"ManDate" : ((10, LCID, 4, 0),()),
		"Revision" : ((9, LCID, 4, 0),()),
		"SerialNumber" : ((1, LCID, 4, 0),()),
		"Version" : ((2, LCID, 4, 0),()),
	}

class _DEDREUtlXEvents:
	"""Event interface for EDREUtlX Control"""
	CLSID = CLSID_Sink = IID('{8AA34F84-95C9-11D3-8EB6-00C0DF2247CA}')
	coclass_clsid = IID('{8AA34F85-95C9-11D3-8EB6-00C0DF2247CA}')
	_public_methods_ = [] # For COM Server support
	_dispid_to_func_ = {
		}

	def __init__(self, oobj = None):
		if oobj is None:
			self._olecp = None
		else:
			import win32com.server.util
			from win32com.server.policy import EventHandlerPolicy
			cpc=oobj._oleobj_.QueryInterface(pythoncom.IID_IConnectionPointContainer)
			cp=cpc.FindConnectionPoint(self.CLSID_Sink)
			cookie=cp.Advise(win32com.server.util.wrap(self, usePolicy=EventHandlerPolicy))
			self._olecp,self._olecp_cookie = cp,cookie
	def __del__(self):
		try:
			self.close()
		except pythoncom.com_error:
			pass
	def close(self):
		if self._olecp is not None:
			cp,cookie,self._olecp,self._olecp_cookie = self._olecp,self._olecp_cookie,None,None
			cp.Unadvise(cookie)
	def _query_interface_(self, iid):
		import win32com.server.util
		if iid==self.CLSID_Sink: return win32com.server.util.wrap(self)

	# Event Handlers
	# If you create handlers, they should have the following prototypes:


from win32com.client import CoClassBaseClass
# This CoClass is known by the name 'EDREUTLX.EDREUtlXCtrl.1'
class EDREUtlX(CoClassBaseClass): # A CoClass
	# EDRE Utility Control
	CLSID = IID('{8AA34F85-95C9-11D3-8EB6-00C0DF2247CA}')
	coclass_sources = [
		_DEDREUtlXEvents,
	]
	default_source = _DEDREUtlXEvents
	coclass_interfaces = [
		_DEDREUtlX,
	]
	default_interface = _DEDREUtlX

RecordMap = {
}

CLSIDToClassMap = {
	'{8AA34F83-95C9-11D3-8EB6-00C0DF2247CA}' : _DEDREUtlX,
	'{8AA34F84-95C9-11D3-8EB6-00C0DF2247CA}' : _DEDREUtlXEvents,
	'{8AA34F85-95C9-11D3-8EB6-00C0DF2247CA}' : EDREUtlX,
}
CLSIDToPackageMap = {}
win32com.client.CLSIDToClass.RegisterCLSIDsFromDict( CLSIDToClassMap )
VTablesToPackageMap = {}
VTablesToClassMap = {
}


NamesToIIDMap = {
	'_DEDREUtlX' : '{8AA34F83-95C9-11D3-8EB6-00C0DF2247CA}',
	'_DEDREUtlXEvents' : '{8AA34F84-95C9-11D3-8EB6-00C0DF2247CA}',
}



From stephan.diehlNOSPAM at gmx.net  Fri Jan  9 06:54:59 2004
From: stephan.diehlNOSPAM at gmx.net (Stephan Diehl)
Date: Fri, 09 Jan 2004 12:54:59 +0100
Subject: Object-based inheritance in Python
References: <btm3u5$13so$1@f1node01.rhrz.uni-bonn.de>
Message-ID: <btm4mo$qpt$06$1@news.t-online.com>

Tobias Windeln wrote:

> Hi!
> 
> I'm looking for suggestions on object-based inheritance
> in Python. Automatic forwarding (often called delegation)
> in Python is easy:
> 

Have a look at Hans Nowaks 'selfish' implementation:
http://zephyrfalcon.org/download/selfish-0.4.2.zip

This is a pythonesque interpretation of the 'self' language by Sun.
By the way, if you are googling, you want probably look for 'prototype based
languages'.


From aienthiwan at mountaincable.net  Mon Jan 19 12:49:38 2004
From: aienthiwan at mountaincable.net (Aienthiwan)
Date: 19 Jan 2004 09:49:38 -0800
Subject: CGI Python user/group permission weirdness
References: <ead0449f.0401180124.5f0796b7@posting.google.com>
	<pan.2004.01.18.10.21.20.719254@yahoo.com>
Message-ID: <ead0449f.0401190949.3cfa09b3@posting.google.com>

Hi Sam,

Thanks for your prompt reply, and for all your suggestions.

The process is a cgi python script being called from apache, so it's
the www-data user that apache generated by default.

That idea of making a link is a good one - I'll remember that for next
time.

I tried pretty much all of what you suggested, to know avail. The last
thing I tried shortly after writing this e-mail was going into apache
and switching the Group directive from www-data to dbtest in
httpd.conf to see if that made a difference; and it did.

So it seems to be dropping groups somehow - I did some research on
this and all the evidence in apache documentation let to the contrary.

I didn't want to leave my www-data user by default as dbtest group, so
I tinkered around with it some more, and eventually put it back the
way that it was.

And then everything started working properly.

I wish I had an idea of what I did exactly - serves me right for
attempting this stuff at 5 in the morning I guess.

Well, problem's solved although I don't know exactly why - thx again
for all your help and suggestions!

Regards,
  Aienthiwan


Samuel Walters <swalters_usenet at yahoo.com> wrote in message news:<pan.2004.01.18.10.21.20.719254 at yahoo.com>...
> | Aienthiwan said |
>  
> > Ok - this one's a baffling one.
>  <chop>
> > I have confirmed that it's the www-data user by calling a
> > os.system('whoami') in my script for debugging.
>  <chop>
> > The only inconsistancy is in dbtest and cvs. 
> 
> Have you tried os.system('groups') to verify that the user is in groups
> dbtest and cvs?  Though I can't think of a reason why, maybe the script 
> or the calling process is dropping it's privileges to these groups.

> Have you tried making all the directories leading up to the path of the
> file executable by dbtest and cvs?  Some oddball code may be walking to
> the path, rather than jumping to the file.  How about world executable?
> 
> If you're just testing, you might also try making the files 777 for a
> minute and testing to see if the problem persists.  (Don't leave this in
> production, only use it to isolate the error.)
> 
> Try making a link from the file you want into another directory.  Can you
> access it with the same permissions as the original, or perhaps with
> different permission?
> 
> What www-daemon is this running on?  Some www-daemons can be configured to
> lock down certain directories and var is a likely candidate for that.  Can
> you access other files withing the var directory?  If you fail this test,
> and succeed with the previous two tests, consider that it might be the
> daemon with an out-of-box configuration to keep web-processes out of
> sensitive system areas.
> 
> HTH
> 
> I'll post if I think of anything else.
> 
> Sam Walters.


From poelzi at poelzi.org  Tue Jan  6 12:26:47 2004
From: poelzi at poelzi.org (daniel.poelzleithner)
Date: Tue, 06 Jan 2004 18:26:47 +0100
Subject: Problems with threads and embedding
In-Reply-To: <20040106160036.GJ18443@unpythonic.net>
References: <3FFAC395.9080900@poelzi.org>
	<20040106160036.GJ18443@unpythonic.net>
Message-ID: <3FFAEFD7.8070705@poelzi.org>

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

Jeff Epler wrote:

| This suggests that the problem may be architecture-specific,
| thread-library specific, or it may be due to some difference between
| the normal python executable and the executable with embedded Python.

Thanks for testing.

i forgot:

[poelzi at dirus]> python/  gcc --version
gcc.real (GCC) 3.3.2 (Debian)
Copyright (C) 2003 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

[poelzi at dirus]> python/  python -V
Python 2.3.3

[poelzi at dirus]> python/  uname -a
Linux dirus.intra.poelzi.org 2.4.22 #5 Sa Okt 18 22:45:53 CEST 2003 i686
GNU/Linux

glibc: Version: 2.3.2


regards
~ Daniel

- --
nihil me cirumdat

.. . .. ... . . .. . ... . .. . ... . . .
pgp key @ http://files.poelzi.org/pgp.txt
ED80 E53D 5269 4BB1 1E73 3A53 CBF9 A421 0A7B 003D

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.4 (GNU/Linux)
Comment: Using GnuPG with Debian - http://enigmail.mozdev.org

iD8DBQE/+u/Wy/mkIQp7AD0RAh3NAKDO8NiT/RGfU5b7hMArdVFRKY1mfwCg1T5J
osWEFOghslxRgzXcFtAvzpI=
=5dTV
-----END PGP SIGNATURE-----




From stefano.covino at libero.it  Wed Jan 14 04:08:27 2004
From: stefano.covino at libero.it (Stefano Covino)
Date: Wed, 14 Jan 2004 10:08:27 +0100
Subject: function minimization
Message-ID: <pan.2004.01.14.09.08.27.455056@libero.it>

Hi!

Does anyone of you know a python library to find minima of
multivariable mathematical functions?

I know that in SciPy there is what I need, however I wonder if there is
something lighter without the need to install the whole package.

Thank you a lot,
		Stefano


From cliechti at gmx.net  Fri Jan 30 14:28:10 2004
From: cliechti at gmx.net (Chris Liechti)
Date: Fri, 30 Jan 2004 19:28:10 +0000 (UTC)
Subject: Tcp/ip programs in python
References: <bve7n1+b7ud@eGroups.com>
	<mailman.1056.1075488164.12720.python-list@python.org>
Message-ID: <Xns9480D03B9C07cliechtigmxnet@62.2.16.4>

Jp Calderone <exarkun at intarweb.us> wrote in 
news:mailman.1056.1075488164.12720.python-list at python.org:

> On Fri, Jan 30, 2004 at 06:27:45PM -0000, M.Dikmen wrote:
>> Do you now a source about socket programming in python? or some source
>> codes, demo programs? i really need them
>> 
>   In order of increasing relevance:

not to forget the python documentation that is also on your harddisk...
http://www.python.org/doc/current/lib/socket-example.html

and also http://www.amk.ca/python/howto/sockets/ (found on 
http://www.python.org/doc/)
 
>     http://www.google.com/
> 
>     http://www.vex.net/parnassus/
> 
>     http://www.twistedmatrix.com/
> 
>   Jp

-- 
Chris <cliechti at gmx.net>



From guido at python.org  Thu Jan 22 10:02:09 2004
From: guido at python.org (Guido van Rossum)
Date: Thu, 22 Jan 2004 07:02:09 -0800
Subject: PyCon price schedule correction
In-Reply-To: Your message of "Mon, 19 Jan 2004 09:50:31 PST."
Message-ID: <200401221502.i0MF29812035@c-24-5-183-134.client.comcast.net>

In my previous announcement, I wrote:

> This is a reminder that the deadline for early bird registration for
> PyCon DC 2004 is February 1, 2004.  Early bird registration is $175;
> after that, it will be $200 through March 17, then $250 at the door.

Unfortunately this gave a too rose-colored view on the not-so-early
registration fees.  The correct price schedule is:

- Early bird (through Feb 1)   $175
- Normal reg (until March 17)  $250  <-- correction!
- Walk-ins                     $300  <-- correction!

To register, visit:

    http://www.pycon.org/dc2004/register/

I urge everybody coming to the conference to register ASAP -- save
yourself or your employer $75!!!  You have until February 1st.

--Guido van Rossum (home page: http://www.python.org/~guido/)



From usenet_spam at janc.invalid  Fri Jan  9 16:39:09 2004
From: usenet_spam at janc.invalid (JanC)
Date: Fri, 09 Jan 2004 21:39:09 GMT
Subject: Python is far from a top performer according to benchmark
	test...
References: <ryELb.238$tK2.228@amstwist00> <btn5db$2f8$1@absinth.dialog.net.pl>
Message-ID: <Xns946BE66E88E82JanC@213.119.4.35>

"Krzysztof Stachlewski" <stach at fr.USUN.pl> schreef:

> With "heavy use of Numeric module" you were calling functions
> written in C. So how can you say that Python is fast,
> when C code is doing all the work.

I think all (or at least most) of the tested compilers, VMs, etc. were 
written in C/C++, and thus are using libraries written in C/C++...

-- 
JanC

"Be strict when sending and tolerant when receiving."
RFC 1958 - Architectural Principles of the Internet - section 3.9


From rajas_sambhare at lycos.com  Tue Jan  6 15:12:15 2004
From: rajas_sambhare at lycos.com (Rajas Sambhare)
Date: 6 Jan 2004 12:12:15 -0800
Subject: libmysqld.dll almost working in python...
Message-ID: <bc5b132e.0401061212.6bdcdace@posting.google.com>

Hi,

This is a followup on a previous thread by JZ 
http://groups.google.com/groups?hl=en&lr=&ie=UTF-8&threadm=ki39sv8s7ui622uriis8mfsg1daca34qqu%404ax.com&rnum=1&prev=/groups%3Fhl%3Den%26lr%3D%26ie%3DUTF-8%26selm%3Dki39sv8s7ui622uriis8mfsg1daca34qqu%25404ax.com

The mysql-python page at sourceforge.net contains beta versions of
mysqldb (specifically 0.9.3b2). This does have the necessary embedded
server support. Some amount tweaking of setup.py is required (namely
pointing the lib variable to the correct directory (usually
c:/mysql/Embedded/DLL/Release). The library builds and installs, and
typing import MySQLdb at the python prompt loads LIBMYSQLD.DLL.

What happens then though, is that calling MySQLdb.server_init with the
correct parameters causes the python IDE to crash, with an access
violation in LIBMYSQLD.DLL.

I checked a bit and it seems the flag USE_TLS has to be set for the
mysys project in the mysql source.
http://dbforums.com/arch/156/2002/11/554910
I did this, created a new libmysqld.dll etc, and recompiled mysqldb
0.9.3b2, but the problem continues. Does anybody know how to avoid
this?

Thanks 

Rajas Sambhare


From tepihlaj at NOpaju.SPAMoulu.fi  Mon Jan  5 17:39:19 2004
From: tepihlaj at NOpaju.SPAMoulu.fi (Tero Pihlajakoski)
Date: 5 Jan 2004 22:39:19 GMT
Subject: Python/C and PYTHONPATH
References: <btbn3o$5oo$1@ousrvr3.oulu.fi>
	<mailman.98.1073310473.12720.python-list@python.org>
	<btc2ng$alg$1@ousrvr3.oulu.fi>
	<pan.2004.01.05.22.04.32.450627@yahoo.com>
Message-ID: <btcp2n$jod$1@ousrvr3.oulu.fi>

Samuel Walters <swalters_usenet at yahoo.com> wrote:

> Fair warning:  At this point, I couldn't even get the example you quoted
> to link properly.  Of course, I didn't dig too deep, as I'm in a hurry.

> ---code---

... snip ...

> Or, call setenv ("man 3 setenv") to manually set a python-path.
> you can use that in combo with getenv ("man 3 getenv") to append to an
> existing PYTHONPATH, if you so choose.

> Give it a go, please let me know how it turns out.  If this doesn't shed
> some light on the matter I might have another idea once I'm not rushing
> around.

(Sorry for the delay, I was offline)

I'll see if it's actually the C-part that's causing problems, but I
worked it around by adding:

PyRun_SimpleString("import sys\nsys.path.insert(0,'')");

right after the Py_Initialize().

Works ok. Guess I'm "allowed" to do that(?)

Thanks,
  - Tero

-- 



From jeremy at jdyallop.freeserve.co.uk  Sat Jan 17 18:38:01 2004
From: jeremy at jdyallop.freeserve.co.uk (Jeremy Yallop)
Date: 17 Jan 2004 23:38:01 GMT
Subject: Best way to do this?
References: <100jg9er3qak890@corp.supernews.com>
Message-ID: <slrnc0jhqp.lsq.jeremy@hehe.cl.cam.ac.uk>

Wil Schultz wrote:
> One of the exercises asks for a program to ask for a password three 
> times. Surprisingly this took me much longer that it probably should 
> have so I am curious if the following is the easiest way this is done. 
> Thanks much!
> 
> *************************************************
> #!/usr/local/bin/python
> 
> count = 0
> password = "null"
> 
> while count < 3:
>          count = count + 1
>          password = raw_input("what's the pass: ")
>          if password == "mypass":
>                  print "Access Granted"
>                  count = 3
>          else:
>                  if count < 3:
>                          print "Try Again"
>                  else:
>                          print "Too Bad"
> *************************************************

I'd write it something like this:

    from getpass import getpass
    attempts, password = 3, 'mypass'
    
    for i in range(attempts):
	if i != 0:
            print 'Try again'
        if getpass("What's the pass: ") == password:
            print 'Access Granted'
            break
    else:
         print 'Too bad' 

Jeremy.


From google at axiomatize.com  Fri Jan 16 19:04:07 2004
From: google at axiomatize.com (Laurent Therond)
Date: 16 Jan 2004 16:04:07 -0800
Subject: Binary strings, unicode and encodings
References: <265368cb.0401151138.37a3a47b@posting.google.com>
	<4006F13C.7D432B98@engcorp.com>
	<265368cb.0401151529.50c36679@posting.google.com>
	<4007F50F.E2AF33AD@engcorp.com>
Message-ID: <265368cb.0401161604.58099d89@posting.google.com>

Peter, thank you for taking the time to answer.

I will need some time to digest this information.

>From where I stand, a Python newbie who knows more about Java, this
concept of binary string is puzzling. I wish Python dealt in Unicode
natively, as Java does. It makes things a lot easier to comprehend.
Having strings be byte arrays, on the other, seems to confuse me.


From CousinStanley at hotmail.com  Fri Jan  9 15:01:09 2004
From: CousinStanley at hotmail.com (Cousin Stanley)
Date: Fri, 9 Jan 2004 13:01:09 -0700
Subject: Problem with OpenGL.GLUT
References: <7447dd2a.0401071402.2c0737e6@posting.google.com>
Message-ID: <btn17b$97bnn$1@ID-130333.news.uni-berlin.de>

Steven .... 

  I'm also having  import  problems 
  with a Win98 installation of PyOpenGL for Python 2.3
  from .... 

      http://prdownloads.sourceforge.net/pyopengl
            /PyOpenGL-2.0.1.07.py2.3-numpy23.exe?download

  Any of the test programs in the Demo folder
  that attempt  from OpenGL.GLUT  fail 
  as does a direct import attempt 
  from the Python interpreter ....

python
Enthought Edition build 1028
Python 2.3 (#46, Aug 11 2003, 09:34:05) [MSC v.1200 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>>
>>> from OpenGL.GLUT import *
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
ImportError: DLL load failed: One of the library files needed to run this applic
ation cannot be found.

Using  < dependency walker >  to examine .... 

       /site-packages/OpenGL/GLUT.pyd 

shows .... glut32.dll  * Not Found * 

I've done a few searches on Google,
but as yet haven't turned up what
seems to be a compatible version 
of this particular missing DLL file .... 

Hopefully, someone here might know
how to resolve this .... 

-- 
Cousin Stanley
Human Being
Phoenix, Arizona



From jolsen at mail2world.com  Thu Jan 29 04:37:28 2004
From: jolsen at mail2world.com (Jesper Olsen)
Date: 29 Jan 2004 01:37:28 -0800
Subject: newsgroup lib
References: <6b17fa95.0401280501.4be454cb@posting.google.com>
	<mailman.908.1075296595.12720.python-list@python.org>
Message-ID: <6b17fa95.0401290137.74dbef58@posting.google.com>

Gerrit Holl <gerrit at nl.linux.org> wrote in message news:<mailman.908.1075296595.12720.python-list at python.org>...
> Jesper Olsen wrote:
> > Is there a python module for accessing newsgroup articles?
> 
> You're looking for nntplib
> 
> http://www.python.org/dev/doc/devel/lib/module-nntplib.html
> 

Indeed so.
Thanks Gerrit & deelan

Jesper


From jepler at unpythonic.net  Sat Jan 24 11:26:14 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Sat, 24 Jan 2004 10:26:14 -0600
Subject: Changing endian format
In-Reply-To: <20040124145616.34640.qmail@web41306.mail.yahoo.com>
References: <20040124145616.34640.qmail@web41306.mail.yahoo.com>
Message-ID: <20040124162614.GB32445@unpythonic.net>

On Sat, Jan 24, 2004 at 06:56:16AM -0800, Amit Gaur wrote:
> Hi newbie to python here,
> I have a binary file and i need to change the endian format..little to big as well as vice versa..could anyone help me out.
> thanks

The struct module supports an endian flag.

As an example, suppose my data format is 
	AAAA BB CC
a 4-byte int followed by two 2-byte ints, and my task is to take a
big-endian version of the data and convert it to small-endian:

import struct
def convert(format, s, e1, e2):
        l = struct.unpack(e1 + format, s)
        return struct.pack(e2 + format, *l)

>>> convert("LHH", "12345678", ">", "<")
'43216587'

See the struct module documentation for more information.

Jeff



From newsgroups at jhrothjr.com  Thu Jan 22 13:26:07 2004
From: newsgroups at jhrothjr.com (John Roth)
Date: Thu, 22 Jan 2004 13:26:07 -0500
Subject: What is object()
References: <mailman.655.1074790103.12720.python-list@python.org>
	<bup01m$hjm$1@panix1.panix.com>
Message-ID: <10105gchtsl1a21@news.supernews.com>

"Aahz" <aahz at pythoncraft.com> wrote in message
news:bup01m$hjm$1 at panix1.panix.com...
> In article <mailman.655.1074790103.12720.python-list at python.org>,
> Hameed Khan  <hameedkhaan at yahoo.com> wrote:
> >
> >  i was reading library refrence manual. there i found
> >object() function. they says in library refrence that
> >        "Return a new featureless object. object() is
> >a base for all new style classes. It has the methods
> >that are common to all instances of new style
> >classes."
>
> There's not much use for an instance of object.  Don't worry about it.

Unless, of course, you're using the __new__() method.

John Roth

> -- 
> Aahz (aahz at pythoncraft.com)           <*>
http://www.pythoncraft.com/




From james at logicalprogression.net  Wed Jan 21 11:15:09 2004
From: james at logicalprogression.net (James Henderson)
Date: Wed, 21 Jan 2004 16:15:09 +0000
Subject: newbie: prefix operator "**"
In-Reply-To: <20040121155959.GB18498@unpythonic.net>
References: <wZwPb.14289$U77.998313@news20.bellglobal.com>
	<20040121155959.GB18498@unpythonic.net>
Message-ID: <200401211615.09463.james@logicalprogression.net>

On Wednesday 21 January 2004 3:59 pm, Jeff Epler wrote:
> On Wed, Jan 21, 2004 at 10:33:49AM -0500, Christian Jauvin wrote:
> > Hello,
> >
> > I am playing with some classes in the Tkinter module
> > to learn some GUI basics.
>
> Take a look at the Tutorial, section 4.7.2.  The ** prefix for an
> argument means that it accepts arbitrary keyword arguments.
> http://python.org/doc/tut/node6.html#SECTION006720000000000000000
>
> Example:
>
> def f(**kw):
>     print kw
>
> >>> f(a=1, b=2)
>
> {'a': 1, 'b': 2}

Since Jeff beat me to it with his reply and reference to the tutorial I'll 
just add that ** is also used in a sort of reverse sense when calling - as 
opposed to defining - a function, so that you can pass a dictionary to a 
function and have all the key-value pairs treated as keyword arguments.  This 
is called the extended call syntax and might be useful, for example, if a 
function with keyword arguments dictionary wants to pass these values on to 
another function, e.g.:

def f(**kw):
    print kw

def g(**kw):
    f(**kw)  # extended call sytax

g(a=1, b=2)

With the same result as above.  Extended call sytax is most useful to avoid 
the use of the deprecated apply().  See:

http://www.python.org/doc/current/lib/non-essential-built-in-funcs.html

under apply()

and:

http://www.python.org/doc/current/ref/calls.html

Finally, as two stars are used for arbitrary dictionaries single stars are 
used for arbitrary sequences.

James
-- 
James Henderson, Logical Progression Ltd.
http://www.logicalprogression.net/
http://sourceforge.net/projects/mailmanager/




From cphsu at zen.com.tw  Wed Jan  7 03:33:17 2004
From: cphsu at zen.com.tw (Kent Hsu (Hsu, Chih-Peng))
Date: Wed, 7 Jan 2004 16:33:17 +0800
Subject: os.system always opens new window on Windows XP/2000
References: <d0132d7d.0401061045.73c28639@posting.google.com>
Message-ID: <btggeq$i1n$1@news.seed.net.tw>


John <ohgoddearlord at yahoo.com> wrote in message
news:d0132d7d.0401061045.73c28639 at posting.google.com...
> Can anyone tell me how to run a bunch of commands in the same command
> line window?  When I do this:
>
> system("command1")
> system("command2")
> ...

If you just want to hide the console window, try
"win32process.CreateProcess"
If you want to set environment variables, I think batch file is OK.

Best  Regards,
Kent Hsu

>
> it opens a new window for every system call.  The alternative I can
> think of is to write out the command to a batch file and run that, but
> I'm wondering if there is a better way to do it.
>
> Partly it is annoying to have 20 cmd windows flash on the screen, but
> also I don't think it works if I do something like this:
>
> system("set envvar=hi")
>
> since I think the envvar does not persist once the command window is
> closed.
>
> thanks!




From nemesis at nowhere.invalid  Sat Jan 24 14:39:42 2004
From: nemesis at nowhere.invalid (Nemesis)
Date: Sat, 24 Jan 2004 19:39:42 GMT
Subject: any news client in Python?
References: <2b4c49e0.0401230915.3438810f@posting.google.com>
Message-ID: <ljhuub.3v1.ln@nemesis.homeinvalid>

Mentre io pensavo ad una intro simpatica "Daniel Han" scriveva: 

> hello everybody.
> i've been looking around for a decent newsreader (not rss)
> that's written in Python. Strange, but i found none so far,
> i've been to sf.net, freshmeat.net, and even googled that,
> still nothing interesting.

I know two newsreader written in Python at least.

1) Pyne, it is a mailreader/newsreader. It is good but lacks some charset
related features. I don't remember the url.

2) XPN, it is an on-line newsreader written in Python+GTK2. I wrote it :-)
It is at an early stage but is quite usable (better with a local server).
Home page is in my sign, it is in italian, you can also check
http://sourceforge.net/projects/xpn

-- 
This is not a beer belly. It's a fuel tank for a sex machine. 

 |\ |       |HomePage   : http://nem01.altervista.org
 | \|emesis |XPN (my nr): http://xpn.altervista.org



From __peter__ at web.de  Sat Jan  3 07:14:53 2004
From: __peter__ at web.de (Peter Otten)
Date: Sat, 03 Jan 2004 13:14:53 +0100
Subject: Filename type (Was: Re: finding file size)
References: <4V4Jb.12709$Vl6.2811218@news20.bellglobal.com>
	<bt3l9i$pog$07$3@news.t-online.com>
	<mailman.45.1073125105.12720.python-list@python.org>
Message-ID: <bt6c23$c6u$07$1@news.t-online.com>

Gerrit Holl wrote:

> I propose to add a "filename" type to Python.

> A different solution to this problem would be to introduce "filename"
> type to Python, a subclass of str. The "name" attribute of file would be
> of this type. This type would inherit a lot of os.path stuff: getsize
> becomes simpler, more readable, and more object oriented, as do other
> os.path functions. I think the alternatives look a lot more prety:

> OLD                                         NEW
> os.path.realpath(fn)                        fn.realpath()
> os.path.getmtime(fp.name)                   fp.name.getmtime()
> os.path.ismount(os.path.dirname(fp.name))   fp.name.dirname().ismount()
> 
> It's more beatiful, simpler, flatter (#3), practical, obvious, easy.

You might have a look at 

http://mail.python.org/pipermail/python-list/2002-June/108425.html

http://members.rogers.com/mcfletch/programming/filepath.py

has an implementation of your proposal by Mike C. Fletcher. I think both
filename class and os.path functions can peacefully coexist.


Peter





From gerrit at nl.linux.org  Fri Jan 30 04:36:39 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Fri, 30 Jan 2004 10:36:39 +0100
Subject: Sort by key, then by content
In-Reply-To: <200401292348.57424.shaleh@speakeasy.net>
References: <9A8139BC-52F3-11D8-9115-000A959CB2EC@netmail.to>
	<200401292348.57424.shaleh@speakeasy.net>
Message-ID: <20040130093639.GA3385@nl.linux.org>

Sean 'Shaleh' Perry wrote:
> >>> contents = zip(d.keys(), d.values())

How does this differ from d.items()?

Gerrit.

-- 
42. If any one take over a field to till it, and obtain no harvest
therefrom, it must be proved that he did no work on the field, and he must
deliver grain, just as his neighbor raised, to the owner of the field.
          -- 1780 BC, Hammurabi, Code of Law
-- 
PrePEP: Builtin path type
    http://people.nl.linux.org/~gerrit/creaties/path/pep-xxxx.html
Asperger's Syndrome - a personal approach:
	http://people.nl.linux.org/~gerrit/english/



From linus.elman at NOZPAMuniworkstech.com  Mon Jan  5 19:17:08 2004
From: linus.elman at NOZPAMuniworkstech.com (Linus Elman)
Date: Tue, 06 Jan 2004 00:17:08 GMT
Subject: Thumbnailing webpages
References: <bt8tk4$bnu$1@news.service.uci.edu>
	<Xns94668ADB6F5ADcpl19ghumspamgourmet@62.153.159.134>
Message-ID: <88nKb.45072$dP1.183571@newsc.telia.net>

Harald!

I saw a message you wrote here last spring but being unable to reply to that
one I do that here instead.

You were interested in a component that creates thumbnails from webpages.
Check out http://www.uniworkstech.com/com.htm , this one does just that. Any
page, any thumb size and emulates any screen resolution (even weird ones
like 1024x10000).

Good luck!

/Linus




From cmkleffner at gmx.de  Wed Jan 14 12:09:16 2004
From: cmkleffner at gmx.de (cmkl)
Date: 14 Jan 2004 09:09:16 -0800
Subject: function minimization
References: <pan.2004.01.14.09.08.27.455056@libero.it>
Message-ID: <3b091a1c.0401140909.78f3d66d@posting.google.com>

what about "Differential Evolution"
for Continuous Function Optimization?
(by Kenneth Price and Rainer Storn)
http://www.icsi.berkeley.edu/~storn/code.html

there is a link to a pure python example on
the web page.

Carl

Stefano Covino <stefano.covino at libero.it> wrote in message news:<pan.2004.01.14.09.08.27.455056 at libero.it>...
> Hi!
> 
> Does anyone of you know a python library to find minima of
> multivariable mathematical functions?
> 
> I know that in SciPy there is what I need, however I wonder if there is
> something lighter without the need to install the whole package.
> 
> Thank you a lot,
> 		Stefano


From newsgroups at jhrothjr.com  Tue Jan 27 15:23:44 2004
From: newsgroups at jhrothjr.com (John Roth)
Date: Tue, 27 Jan 2004 15:23:44 -0500
Subject: descriptors and old-style classes
References: <slrnc1d88e.qr.adim@lacerta.logilab.fr>
Message-ID: <101dia2qordds0b@news.supernews.com>


"Adrien Di Mascio" <adim at logilab.fr> wrote in message
news:slrnc1d88e.qr.adim at lacerta.logilab.fr...
> Hi,
>
> I've recently discovered that descriptors can be used with old-style
> classes if they don't define a __set__ method (and this would be why
> class and static methods are usable with old-style classes).
> I understand why the __set__ method is not called with old-style
> classes, but I don't understand why __get__ *is* called.
> I thought the transformation from :
>   a.x
> into :
>   type(a).__dict__['x'].__get__(a, type(a))
> was done in object.__getattribute__ (or type.__getattribute__), but then
> this does not explain why this also seems to work with old-style
> classes.
>
> Could someboby help me here ??

At a rough guess, the search logic is in __getattribute__, but the
actual invocation is probably in the bytecode somewhere.
__getattribute__, after all, is supposed to return the attribute
requested, not to invoke it.

So on an old style class, the standard search will find the
descriptor object just fine, then the bytecode will detect it
has a __get__ method and invoke it.

John Roth
>
> Cheers,
> Adrien.
>
> -- 
> Adrien Di Mascio
> LOGILAB, Paris (France).
> http://www.logilab.com   http://www.logilab.fr   http://www.logilab.org
>




From admin2 at enabled.com  Thu Jan 15 12:15:16 2004
From: admin2 at enabled.com (Noah)
Date: Thu, 15 Jan 2004 09:15:16 -0800
Subject: cannot find input file: Modules/Setup.config.in
Message-ID: <20040115171436.M94467@enabled.com>

freeBSD 4-8 STABLE

cant install Python-2.3.3

configure: creating ./config.status
config.status: creating Makefile.pre
config.status: creating Modules/Setup.config
config.status: error: cannot find input file: Modules/Setup.config.in

clues please?

- Noah




From destan at sdu.edu.tr  Mon Jan  5 11:03:44 2004
From: destan at sdu.edu.tr (Destan YILANCI)
Date: Mon, 05 Jan 2004 18:03:44 +0200
Subject: (no subject)
Message-ID: <3FF98AE0.2070100@sdu.edu.tr>






From wweston at att.net  Thu Jan 29 16:11:02 2004
From: wweston at att.net (wes weston)
Date: Thu, 29 Jan 2004 21:11:02 GMT
Subject: ditto
In-Reply-To: <mailman.1000.1075402284.12720.python-list@python.org>
References: <pRbSb.330334$ts4.37644@pd7tw3no>
	<mailman.1000.1075402284.12720.python-list@python.org>
Message-ID: <GFeSb.136598$6y6.2660937@bgtnsc05-news.ops.worldnet.att.net>

Preferably, a program that runs or a screen dump.

Mark McEahern wrote:
> Elaine Jackson wrote:
> 
>> If bool(B_i)==True for 1<=i<=n and j is the smallest i with 
>> bool(A_j)==True,
>> then the evaluation of (A_1 and B_1) or ... or (A_n and B_n) returns 
>> B_j without
>> evaluating any other B_i. This is such a useful mode of expression 
>> that I would
>> like to be able to use something similar even when there is an i with
>> bool(B_i)==False. The only thing I can think of by myself is ( (A_1 
>> and [B_1])
>> or ... or (A_n and [B_n]) )[0], and I can't be satisfied with that for 
>> obvious
>> reasons. Does anybody know a good way to express this? Any help will 
>> be mucho
>> appreciado.
>>
> Why not write a unit test that demonstrates the behavior you want?  
> It'll then likely be obvious to someone both what your problem is and 
> what a likely solution is.
> 
> Cheers,
> 
> // m
> 



From aahz at pythoncraft.com  Wed Jan 28 12:00:46 2004
From: aahz at pythoncraft.com (Aahz)
Date: 28 Jan 2004 12:00:46 -0500
Subject: PEP 326 is D-E-A-D (was Re: How does compare work?)
References: <40158680$0$7044$ba620e4c@news.skynet.be>
	<20040126235704.GD13453@siliconimage.com>
	<mailman.850.1075209472.12720.python-list@python.org>
	<eN+FAls/KHIb089yn@the-wire.com>
Message-ID: <bv8pru$f64$1@panix1.panix.com>

In article <eN+FAls/KHIb089yn at the-wire.com>,
Mel Wilson <mwilson at the-wire.com> wrote:
>
>Even then, what about PEP 326, which presumes to define highest and
>lowest objects that can be compared with anything?

What about it?  ;-)

(Guido just posted a Pronouncement rejecting it.)
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

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


From ebgym at tm.net.my  Thu Jan  8 23:49:47 2004
From: ebgym at tm.net.my (Mei)
Date: Fri, 09 Jan 2004 12:49:47 +0800
Subject: silent  saveas ?
Message-ID: <000001c3d66c$0238ba30$0100a8c0@mei>

HI!
 
Sir,
 
I'm having difficulties to save the web browser in silent. when I try to
use
 
WebBrowser1.ExecWB OLECMDID_SAVEAS, OLECMDEXECOPT_DONTPROMPTUSER,
"c:\blank.html", "c:\blank.html"
 
The save window keep prompting up. How can I keep the save window in
silent? Please help me, Thanks a lot
 
Mei
-------------- next part --------------
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From jcarlson at uci.edu  Tue Jan 20 03:13:52 2004
From: jcarlson at uci.edu (Josiah Carlson)
Date: Tue, 20 Jan 2004 00:13:52 -0800
Subject: PDF library for reading PDF files
References: <mailman.464.1074430854.12720.python-list@python.org>
	<400BFF7B.95F21050@netsurf.de>
	<mailman.534.1074585531.12720.python-list@python.org>
Message-ID: <20040120001121.E680.JCARLSON@uci.edu>

> Thanks. I am studying the PDF spec, it just does not seem to be that easy
> having to implement all the decompressions, etc. The "information" I am
> trying to extract from the PDF file is the text, specifically in a way to
> keep the original paragraphs of the text. I have seen so far one shareware
> standalone tool that extracts the text (and a lot of other formatting
> garbage) into an RTF document keeping the paragraphs as well. I would need
> only the text.
> 
> Any suggestions?

Peter,

Suggestion: extract the document to RTF using that other tool, then use
any one of the few dozen RTF parsers to convert them into plaintext.

 - Josiah


From try_vanevery_at_mycompanyname at yahoo.com  Thu Jan 15 16:45:06 2004
From: try_vanevery_at_mycompanyname at yahoo.com (Brandon J. Van Every)
Date: Thu, 15 Jan 2004 13:45:06 -0800
Subject: The GPL / BSD cultural divide (was ProtoCiv: porting Freeciv to
	Python CANNED)
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<n22Nb.11299$9k7.210522@news.xtra.co.nz>
	<bu2pgs$d123a$1@ID-207230.news.uni-berlin.de>
	<4004EC9E.1E2E2893@alcyone.com> <bu3iv2$n2u$4@tyfon.itea.ntnu.no>
	<bu4dii$daqjq$1@ID-207230.news.uni-berlin.de>
	<a%uNb.5410$HR.11098@news.indigo.ie>
Message-ID: <bu70vd$e1jqp$1@ID-207230.news.uni-berlin.de>

Gerry Quinn wrote:
> In article <bu4dii$daqjq$1 at ID-207230.news.uni-berlin.de>, "Brandon J.
> Van Every" <try_vanevery_at_mycompanyname at yahoo.com> wrote:
>> Agreed, and more specifically, there is a huge *cultural divide*
>> between
>> most OSS developers and proprietary commercial developers who simply
>> want to
>> add some OSS "to get the boring bits over with."
>
> And guess what bits of a project OSS programmers often tend not to
> bother finishing?
>
> As somebody once said, the purpose of paying wages is not to motivate
> people to work.  It's to motivate them to come in on Monday mornings.
>
> Think of the boring bits as commercial software's secret weapon ;-)

Some boring bits are easily accomplished, and tractable through incremental,
communal effort.  Others take too much pain to bother with.  I think in
theory, commercial developers could alleviate themselves of certain boring
problems through BSD open source projects.  A good example would be
http://nebuladevice.sourceforge.net .  Of course, that project would never
have gotten off the ground without the up front contribution of Radon Labs,
but since they did decide to do that, it's a viable 3D engine for solving
various people's problems.

In practice, there's all kinds of "Not Invented Here" and "Make Myself
Invaluable" out there.  I see a lot of political reasons why human beings
will never cooperate to save humanity much labor.  Even when projects *are*
BSD licensed, like Python for instance, you can get people refusing to
*market* a product properly for predictable political reasons.  Distaste for
commercial developers, "suits," other people's problems, etc.  Consequently,
relevance is diminished.  When relevance is diminished, the available
solutions become fractured and things don't work well together.  Redundant
labor is performed because people gotta be different, they gotta try to make
everyone else march to *their* drum instead of being more inclusive.

-- 
Cheers,                     www.indiegamedesign.com
Brandon Van Every           Seattle, WA

20% of the world is real.
80% is gobbledygook we make up inside our own heads.



From fumanchu at amor.org  Mon Jan  5 14:59:13 2004
From: fumanchu at amor.org (Robert Brewer)
Date: Mon, 5 Jan 2004 11:59:13 -0800
Subject: Problem: 'Threads' in Python?
Message-ID: <DE1CF2B4FEC4A342BF62B6B2B334601E561BC5@opus.amorhq.net>

If you use mod_python with Apache, or ASP/IIS, you can spawn a new
thread (see the threading module in the Python Library), and the page
request will complete. Since the python module is not reloaded between
requests, the new thread will continue even after the original thread
has terminated. Not sure if that's worth it to you to change, or if
there's a way to do it with bare cgi.


FuManChu
at amor.org

> -----Original Message-----
> From: Ralph Sluiters [mailto:ralph at sluiters.de] 
> Sent: Monday, January 05, 2004 11:58 AM
> To: python-list at python.org
> Subject: Problem: 'Threads' in Python?
> 
> 
> Hi,
> i've got a small problem with my python-script. It is a 
> cgi-script, which is
> called regulary (e.g. every 5 minutes) and returns a 
> xml-data-structure.
> This script calls a very slow function, with a duration of 
> 10-40 seconds. To
> avoid delays, i inserted a cache for the data. So, if the 
> script is called,
> it returns the last caculated data-structure and then the 
> function is called
> again and the new data is stored in the cache. (There is no 
> problem to use
> older but faster data)
> 
> My problem is, that the client (A Java program (or browser, 
> command line))
> waits, until the whole script has ended and so the cache is 
> worthless. How
> can I tell the client/browser/... that after the last print 
> line there is no
> more data and it can proceed? Or how can I tell the python 
> script, that
> everything after the return of the data (the retieval of the 
> new data and
> the storage in a file) can be done in an other thread or in 
> the background?
> 
> Greetings
> 
> Ralph
> 
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list
> 



From codeapocalypse at msn.com  Wed Jan 21 03:21:37 2004
From: codeapocalypse at msn.com (Brian)
Date: 21 Jan 2004 00:21:37 -0800
Subject: Do (USA) Python conferences require a coast?
References: <6b50e1-goo.ln1@jowls.lairds.org>
	<mailman.556.1074633147.12720.python-list@python.org>
Message-ID: <ef3269df.0401210021.55cab893@posting.google.com>

> I'd vote for Chicago.  Of course, technically speaking we're on a coast
> also.  It should be just about the easiest city to get to from anywhere in
> the US though.

Given recent weather conditions, I'd think everyone would jump at the
idea of coming out here, to sunny Southern California for a
conference...  (I missed the Long Beach conference, and D.C. is just
so far away...and much colder, brrr. :)


From vidiv at gmx.net  Tue Jan 13 10:20:30 2004
From: vidiv at gmx.net (vidiv at gmx.net)
Date: Tue, 13 Jan 2004 16:20:30 +0100 (MET)
Subject: (no subject)
Message-ID: <10125.1074007230@www23.gmx.net>

Hi All, 

I am a student-newbie to Python-List (for that matter Python language)
working on a project for Terminal Emulation. The dumb terminal interacts with an
IBM mainframe through a 'multiplexer-MUX'. 
The s/w is currently running in 'C' on a Windows NT environment and the
requirement is to introduce Object Oriented concepts and C++ was the obvious
choice, but i came across  'Python' (and also Perl, Ruby, ..etc) after i
installed RH8 on my PC last month. We are actively canvassing the advantages of GNU
s/w and philosophy and would like to simultaneously port it to GNU/Linux
platform.

I have read some of the documentation in Python.
Before using Python as our project language it would be useful to know
whether Python has functions, libraries/headers (like C does) capable of handling
the foll. :

1] open and close serial ports,
2] set baud rates,
3] check parity bit/byte,
4] stop bits,
5] Hardware handshaking,
6] selection of port,......

Our existing 'C' code is to be ported to the GNU/Linux platform so we are
actively looking at an OOP concept. The part for serial port communication in
C++ has classes so its easier to write customized programs to do most of the
above. 

Most importantly compatibility issues with the existing Multiplexer and
Cisco Routers have to be kept in mind as the company will *not* make any H/W
changes. 

We saw that python has some routines for using existing C code, so we dont
have to rewrite everything and can make modules containing functions and use
it to operate on files. 
Does it provide any other serial port communication features ?
It would be nice if anyone could throw some light on some of the above
issues.

Thankyou for your time.

Ciao, 
Vidya.

-- 
+++ GMX - die erste Adresse f?r Mail, Message, More +++
Neu: Preissenkung f?r MMS und FreeMMS! http://www.gmx.net





From claird at lairds.com  Fri Jan 23 22:02:31 2004
From: claird at lairds.com (Cameron Laird)
Date: Sat, 24 Jan 2004 03:02:31 -0000
Subject: Perl vs. Python for text manipulation (was: [OPINION] - does
	language really matter if they all do the	samething?)
References: <69A0D4AB81C51447AD6BA387782B8D64093D8A@midl-mail4.etcconnect.com>
	<028FD9F0-4E01-11D8-BB78-0003934ACDEC@zdome.net>
	<mailman.720.1074906442.12720.python-list@python.org>
Message-ID: <1013o27e3nb141@corp.supernews.com>

In article <mailman.720.1074906442.12720.python-list at python.org>,
Paul Prescod  <paul at prescod.net> wrote:
>Dietrich Epp wrote:
>> 
>>...
>I would appreciate an example of something you would do by capturing a 
>message that cannot be done in Python.
>
>I rather wonder if you've illustrated the downside of flitting from 
>language to langauge. You may think you're using a language to capacity 
>without actually doing so. I could be wrong but perhaps even the tasks 
>you turn to Lisp or Perl for may have easy equivalents in Python.
>
>  Paul Prescod
>
>

The comparison with Perl in particular interests me.  I
often encounter characterizations of Perl (or Ruby--I
regard them as equivalent in this dimension) as the par-
agon of text manipulation.  It's not, of course, as Icon
conclusively demonstrates, at least for me; but I don't
even see Perl as distinctly superior to Python in text
mangling.  I recognize that Python REs can feel a bit
cumbersome, in comparison to Perl, because they essenti-
ally demand the extra step of explicit compilation.  Is
that all that people mean, though, when they talk about
Perl's superiority for text mangling?  Is there more to
it?
-- 

Cameron Laird <claird at phaseit.net>
Business:  http://www.Phaseit.net


From anthony at interlink.com.au  Tue Jan 27 23:10:23 2004
From: anthony at interlink.com.au (Anthony Baxter)
Date: Wed, 28 Jan 2004 15:10:23 +1100
Subject: I support PEP 326 
In-Reply-To: <698f09f8.0401272000.79704ef0@posting.google.com> 
References: <698f09f8.0401272000.79704ef0@posting.google.com>
	<mailman.654.1074788734.12720.python-list@python.org>
	<698f09f8.0401271318.21c9ca72@posting.google.com>
	<bv6ph8$181$1@news.service.uci.edu> 
Message-ID: <20040128041023.2EB9225B353@bonanza.off.ekorp.com>


>>> Jeremy Fincher wrote
> I simply can't understand this aversion to sticking useful things in
> the builtin namespace.  Especially when marginally useful things like
> reversed (a trivially written 3-line generator) have been put there.

>>> len(dir(__builtins__))
125

That's a _lot_ of stuff in one module. Even if you exclude the 40-odd 
exceptions that are there, that's still a lot of guff in one big flat
namespace.

Anthony





From try_vanevery_at_mycompanyname at yahoo.com  Wed Jan 14 02:13:20 2004
From: try_vanevery_at_mycompanyname at yahoo.com (Brandon J. Van Every)
Date: Tue, 13 Jan 2004 23:13:20 -0800
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
	<K_YMb.10994$9k7.204413@news.xtra.co.nz>
	<bu1qq3$cu440$1@ID-207230.news.uni-berlin.de>
	<n22Nb.11299$9k7.210522@news.xtra.co.nz>
Message-ID: <bu2pgs$d123a$1@ID-207230.news.uni-berlin.de>


"Peter Ashford" <me at here.there.com> wrote in message
news:n22Nb.11299$9k7.210522 at news.xtra.co.nz...
> Brandon J. Van Every wrote:
> > "Peter Ashford" <me at here.there.com> wrote in message
> > news:K_YMb.10994$9k7.204413 at news.xtra.co.nz...
> >
> >>Brandon, don't be such an arsehole.  OS developers do things their own
> >>way and offer their labour for free.  If you don't like it noone will
> >>care - but don't denegrate people just because they don't do things your
> >>way.
> >
> >
> > I'll denigrate them all I want.  With rare exceptions, they aren't a
value
> > add to what I want to get done.  There's this huge cultural divide
between
> > hobbyists and commercialists.
> >
>
> Why do you think OS developers owe you any kind of value at all?

I don't.  But that's not going to stop me from denigrating them for being
incapable of fulfillng the kinds of projects I have in mind.

-- 
Cheers,                     www.indiegamedesign.com
Brandon Van Every           Seattle, WA

20% of the world is real.
80% is gobbledygook we make up inside our own heads.




From miki.tebeka at zoran.com  Thu Jan  8 08:40:09 2004
From: miki.tebeka at zoran.com (Miki Tebeka)
Date: 8 Jan 2004 05:40:09 -0800
Subject: Read from, then write to a file without closing first???
References: <fq6Lb.59055$BQ5.29970@fed1read03>
Message-ID: <4f0a9fdb.0401080540.dd5ce58@posting.google.com>

Hello Amy,

> I am looking to make this code a little "nicer"... any suggestions???
> I want to do a "read+" where I would be able to first read the contents of
> the file... then either close the file out or write to the file without
> appending.  I want to overwrite the content.
def check(file, msg):
    if open(file).read() != msg:
        open(file, "w").write(msg)

HTH.
Miki


From CousinStanley at hotmail.com  Sat Jan 17 18:32:00 2004
From: CousinStanley at hotmail.com (Cousin Stanley)
Date: Sat, 17 Jan 2004 16:32:00 -0700
Subject: py2exe 0.5.0 (finally) released
References: <y8s7aeps.fsf@python.net>
Message-ID: <bucgi2$g68td$1@ID-130333.news.uni-berlin.de>

| ....
| python setup.py py2exe
| ....
| RuntimeError: this function requires unicows.dll in the Python directory 
| on Win95/98/Me
| ....

Thomas ....

    Google search found a MicroSoft download 
    for unicows.dll .... 

http://www.microsoft.com/downloads/details.aspx?familyid=73ba7bd7-ed06-4f0d-80a4-2a7eeaee17e2&displaylang=en    

    A copy of this dll in the Python23 folder
    has eliminated the problem and Windows executables
    generated for .... /py2exe/samples/simple  work as expected .... 

    Thanks for making py2exe available ....

    Now I'm looking forward to learning how to use it ....

-- 
Cousin Stanley
Human Being
Phoenix, Arizona



From aahz at pythoncraft.com  Sat Jan 24 17:07:04 2004
From: aahz at pythoncraft.com (Aahz)
Date: 24 Jan 2004 17:07:04 -0500
Subject: Perl vs. Python for text manipulation
References: <69A0D4AB81C51447AD6BA387782B8D64093D8A@midl-mail4.etcconnect.com>
	<buu6j5$12lf$1@nadya.doma> <buu7pq$i67$1@panix1.panix.com>
	<buubrh$183r$1@nadya.doma>
Message-ID: <buuqa8$crj$1@panix1.panix.com>

In article <buubrh$183r$1 at nadya.doma>, Serge Orlov <sombDELETE at pobox.ru> wrote:
>"Aahz" <aahz at pythoncraft.com> wrote in message news:buu7pq$i67$1 at panix1.panix.com...
>> 
>> At this point,
>> Perl's speed advantage should come from two and only two sources: Perl
>> optimizes the snot out of platform I/O (so these speed tests don't apply
>> to a platform Perl hasn't been ported to), and Perl does not use the
>> thread-safe forms of I/O.  Python does a fair amount of internal caching
>> to make up for that, and the file object is already written in C.
>
>I'm not sure I understand what does it mean "optimize the snot out
>of platform I/O"? You just use the bare bones non-caching API and do
>your own simple caching doing as little as possible. This will allow
>programs that work with files as streams (read sequentially a lot from
>one file, write sequentially to another) to run at top speed. Other
>access patterns may suffer but not very much.

My understanding is that Perl uses platform-specific low-level I/O calls
when possible.  Python sticks with ANSI functions.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

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


From carroll at tjc.com  Fri Jan  9 15:10:50 2004
From: carroll at tjc.com (Terry Carroll)
Date: Fri, 09 Jan 2004 20:10:50 GMT
Subject: urllib - changing the user agent
References: <8089854e.0401090509.3dd74859@posting.google.com>
	<871xq9ky6v.fsf@pobox.com>
Message-ID: <4k2uvvkiu7kd5rjsqhci29r9sg97fjdmd8@4ax.com>

On 09 Jan 2004 14:12:56 +0000, jjl at pobox.com (John J. Lee) wrote:

>Don't do it, then.  Use the google API (mind you, not certain that
>google groups is part of that).

    Can Google APIs be used to access Google Groups? ...
  
    No. The Google Web APIs service can only be used to search 
    Google's main index of 3 billion web pages.

http://www.google.com/apis/api_faq.html#ini2



From jjl at pobox.com  Sat Jan 24 10:18:48 2004
From: jjl at pobox.com (John J. Lee)
Date: 24 Jan 2004 15:18:48 +0000
Subject: Urllib2 upgrade is breaking urlopen()
References: <1d17eeb7.0401221818.7d98672@posting.google.com>
	<87znce4yv5.fsf@pobox.com>
Message-ID: <8765f11ijr.fsf@pobox.com>

jjl at pobox.com (John J. Lee) writes:

> dj00302003 at yahoo.com (Jay Davis) writes:
> 
> > We have a lot of simple code using 'urllib', that basically
> > just goes out and opens and read()'s some http url.  Very basic,
> > ten line scripts, and they work fine with urllib.
> > 
> > We want to use urllib2 for everything, though, but when we
> > do we get: 
> [...]
> > urllib2.HTTPError: HTTP Error 302: The HTTP server returned a redirect
> > error that would lead to an infinite loop.
> > The last 30x error message was:
> > Found
> 
> Which version of Python are you using?
> 
> It might also help if you can give a publicly-accessible URL that
> triggers the problem (mail it to me privately if you prefer).

Jay sent me a URL, and it turns out both urllib and urllib2 are
functioning as intended.  There's a 302 loop caused by the server
expecting cookies to get returned.  urllib goes into a loop until it
notices it's redirected 10 times, then just returns the 302 as a
normal response (which doesn't seem very nice, but appears to be what
was intended).  urllib2 detects the loop and returns the 302 as an
HTTPError exception (which can be caught and .read() if necessary).


John


From jwoehr at attglobal.net  Fri Jan 16 12:39:01 2004
From: jwoehr at attglobal.net (Jack J. Woehr)
Date: Fri, 16 Jan 2004 10:39:01 -0700
Subject: viewcvs install error on solaris
References: <4007e92d$0$325$ba620e4c@news.skynet.be>
Message-ID: <400821B5.F7B7AB1B@attglobal.net>

bva wrote:

> Hello,
>
> While trying to install viewcvs on a solaris 5.9 machine I get the
> following error message:
>
> Traceback (most recent call last):
>    File "./viewcvs-install", line 35, in ?
>      import compat
>    File "./lib/compat.py", line 20, in ?
>      import urllib
>    File "/usr/local/lib/python2.2/urllib.py", line 26, in ?
>      import socket
>    File "/usr/local/lib/python2.2/socket.py", line 41, in ?
>      from _socket import *
> ImportError: No module named _socket
>
> Python is installed on the machine.  Can anybody tell me what I'm doing
> wrong or what I've forgotten?
>

Apparently, there's a module named "socket" that you don't have installed.


--
Jack J. Woehr                 # Ceterum censeo
PO Box 51, Golden, CO 80402   # in herbas belli
http://www.softwoehr.com      # ab idem desistamus.





From mesteve_b at hotmail.com  Fri Jan 23 20:50:36 2004
From: mesteve_b at hotmail.com (python newbie)
Date: Sat, 24 Jan 2004 01:50:36 GMT
Subject: debugging
References: <88bc63c6.0401230416.7acf904c@posting.google.com>
	<1012jf28chjio61@corp.supernews.com>
Message-ID: <MbkQb.16492$8J4.3558@newssvr25.news.prodigy.com>

I second the recommend. on Komodo. I'm definitely happy with it myself. I
recently bought the personal edition.
If you install the ActiveState version, as you heard by now, you get
PythonWin which can debug. I notice the similarity in interfaces even, as
they were both made by ActiveState of course. However Komodo has a lot of
functionality beyond it, if you need that it is (if you even care about
Komodo and what I'm typing here, bye).

"Michael Geary" <Mike at DeleteThis.Geary.com> wrote in message
news:1012jf28chjio61 at corp.supernews.com...
> Doug Farrell wrote:
> > Can someone help me out a little with Python? What do people
> > use to debug Python code? I don't understand how to use the
> > built in debugger and I haven't had any luck getting ddd to
> > debug my Python programs. I end up falling back on
> > inserting print statements in my code to figure out what's
> > going on. This works but isn't always the fastest route to a
> > solution. So, I'm just wondering what other people do.
>
> What OS are you running?
>
> On Windows, PythonWin has a nice interactive debugger.
>
> My favorite is Komodo, which is available for Windows, Linux, and Solaris:
>
> http://www.activestate.com/Products/Komodo/
>
> Komodo is not free, but the personal edition is pretty cheap, and the
> commercial edition is well worth the price for commercial development.
>
> -Mike
>
>




From fBechmann at web.de  Sat Jan 24 12:48:54 2004
From: fBechmann at web.de (Frank Bechmann)
Date: 24 Jan 2004 09:48:54 -0800
Subject: Perl vs. Python for text manipulation
References: <69A0D4AB81C51447AD6BA387782B8D64093D8A@midl-mail4.etcconnect.com>
	<028FD9F0-4E01-11D8-BB78-0003934ACDEC@zdome.net>
	<mailman.720.1074906442.12720.python-list@python.org>
	<1013o27e3nb141@corp.supernews.com>
	<ouhdyloduy.fsf@andlx-anamika.cisco.com>
Message-ID: <dbc00a99.0401240948.1b3cb4eb@posting.google.com>

but you will be able to read/expand/... your python program also 6
months after you wrote it and that won't happen w/ perl.

and that should be worth some price.


From fumanchu at amor.org  Wed Jan 28 10:24:49 2004
From: fumanchu at amor.org (Robert Brewer)
Date: Wed, 28 Jan 2004 07:24:49 -0800
Subject: fast deep-copying of instances
Message-ID: <DE1CF2B4FEC4A342BF62B6B2B334601E561C8C@opus.amorhq.net>

Michal Vitecek wrote:
>  hello,
> 
>  i have a data cache which sits between a slow database and 
> my server and
>  it's used to cache data retrieved from the database. in 
> order for it to
>  work correctly (race-conditions) i need a fast deep-copying of
>  instances (the cache is used heavily).
> 
>  i tried to use copy module but it's *very* slow, then i tried cPickle
>  to pickle and depickle instances which was faster, but still slow.
>  
>  then i've come across cCopy which is 8x faster than copy, but
>  unfortunately it doesn't work with new style classes because type()'s
>  return is crappy for them. so the question is: does there 
> exist a fast
>  copy module which works with new style classes?

If you don't find something pre-built, you can always build it yourself
into the classes which you are caching, via __copy__ and __deepcopy__
methods.:

    def __copy__(self):
        newUnit = self.__class__()
        newUnit.ID = u''
        newUnit._data.update(self._data)
        newUnit.dirty = False
        newUnit.concrete = False
        return newUnit

>From the Library ref on the copy module:

"In order for a class to define its own copy implementation, it can
define special methods __copy__() and __deepcopy__(). The former is
called to implement the shallow copy operation; no additional arguments
are passed. The latter is called to implement the deep copy operation;
it is passed one argument, the memo dictionary. If the __deepcopy__()
implementation needs to make a deep copy of a component, it should call
the deepcopy() function with the component as first argument and the
memo dictionary as second argument."

HTH!


Robert Brewer
MIS
Amor Ministries
fumanchu at amor.org



From tim.hochberg at ieee.org  Wed Jan 21 18:22:43 2004
From: tim.hochberg at ieee.org (Tim Hochberg)
Date: Wed, 21 Jan 2004 16:22:43 -0700
Subject: [Numpy-discussion] Status of Numeric
In-Reply-To: <vpmt0058gq2hj2q8jh8pakm9d80eridvmv@4ax.com>
References: <CEELJPECNGEGKFNDLHFFGEBKCCAA.perry@stsci.edu>	<mailman.533.1074574795.12720.python-list@python.org>	<bumghc$dsb$1@nrc-news.nrc.ca>
	<vpmt0058gq2hj2q8jh8pakm9d80eridvmv@4ax.com>
Message-ID: <400F09C3.9020708@ieee.org>

Arthur wrote:
[SNIP]
> Which, to me, seems like a worthy goal. 
> 
> On the other hand, it would seem that the goal of something to move
> into the core would be performance optimized at the range of array
> size most commonly encountered.  Rather than for the extraodrinary,
> which seems to be the goal of numarray, responding to specific needs
> of the numarray development team's applications.

I'm not sure where you came up with this, but it's wrong on at least two 
counts. The first is that last I heard the crossover point where 
Numarray becomes faster than Numeric is about 2000 elements. It would be 
nice if that becomes smaller, but I certainly wouldn't call it extreme. 
In fact I'd venture that the majority of cases where numeric operations 
are a bottleneck would already be faster under Numarray. In my 
experience, while it's not uncommon to use short arrays, it is rare for 
them to be a bottleneck.

The second point is the relative speediness of Numeric at low array 
sizes is the result that nearly all of it is implemented in C, whereas 
much of Numarray is implemented in Python. This results in a larger 
overhead for Numarray, which is why it's slower for small arrays. As I 
understand it, the decision to base most of Numarray in Python was 
driven by maintainability; it wasn't an attempt to optimize large arrays 
at the expense of small ones.


> Has the core Python development team given out clues about their
> feelings/requirements for a move of either Numeric or numarray into
> the core? 

I believe that one major requirement was that the numeric community come 
to a consensus on an array package and be willing to support it in the 
core. There may be other stuff.


> It concerns me that this thread isn't trafficked.

I suspect that most of the exchange has taken place on 
numpy-discussion at lists.sourceforge.net.

[SNIP]

-tim




From jepler at unpythonic.net  Tue Jan  6 22:48:28 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Tue, 6 Jan 2004 21:48:28 -0600
Subject: KeyboardInterrupt and threading
In-Reply-To: <a6562e06.0401061844.3269da85@posting.google.com>
References: <a6562e06.0401021352.65aac82b@posting.google.com>
	<m3fzeu73k3.fsf@pc150.maths.bris.ac.uk>
	<a6562e06.0401061844.3269da85@posting.google.com>
Message-ID: <20040107034828.GD17102@unpythonic.net>

Running your attached program, it works just fine whereever I try it,
except on a system so old it only has Python 1.5 installed.  Even that
worked after a few seconds of editing.

Here's the behavior I saw on Fedora Core 1:
$ python ivan.py
CPU hog subthread spawned
main thread caught KeyboardInterrupt
CPU hog subthread joined at counter 76429

This is the behavior I saw on redhat 9:
$ python /tmp/ivan.py 
CPU hog subthread spawned
main thread caught KeyboardInterrupt
CPU hog subthread joined at counter 89897

Here's the behavior I saw on Red Hat 7.2:
CPU hog subthread spawned
main thread caught KeyboardInterrupt
CPU hog subthread joined at counter 31764

Here's the behavior I saw on Windows XP:
C:\...> python ivan.py
CPU hog subthread spawned
main thread caught KeyboardInterrupt
CPU hog subthread joined at counter 665928

Here's the behavior I saw on Red Hat 6.2:
$ python1.5 ivan.py 
  File "ivan.py", line 19
    self.counter += 1
                  ^
SyntaxError: invalid syntax
$ vi ivan.py
$ python1.5 ivan.py
CPU hog subthread spawned
main thread caught KeyboardInterrupt
CPU hog subthread joined at counter 238983

Jeff



From mwh at python.net  Tue Jan 13 12:37:16 2004
From: mwh at python.net (Michael Hudson)
Date: Tue, 13 Jan 2004 17:37:16 GMT
Subject: Design Question
References: <73b00f0c.0401130928.595842c0@posting.google.com>
Message-ID: <m3d69nyckz.fsf@pc150.maths.bris.ac.uk>

ferrell at diablotech.com (Robert Ferrell) writes:

> I have a question which is more about OO design than Python per se. 
> I've noticed that a number of posters to this list have very good
> suggestions for SE issues, so I'm hoping that someone will be able to
> give me some guidance.
> 
> My question is about how to architect a class hierarchy where some
> methods are nearly identical between a superclass and a subclass, but
> differ slightly.  For example:
> 
> class Sup(object):
>    def __init__(self):
>       self.specialFlag = False
>    def aMeth(self):
>        <do some stuff>
>        <if self.specialFlag, do a special thing>
>        <do more stuff>
> 
> class Sub(Sup):
>   def __init__(self):
>     self.specialFlag = True
> 
> In this example, the method aMeth just checks for specialFlag, and if
> it's True, does the special stuff required.
> 
> This allows me to share aMeth, and not have to duplicate code. 
> However, this doesn't feel great to me because Sup has to know about
> Sub in some fashion.  

I'm not an OO bigot, and in some circumstances I think that
superclasses knowing about all their subclasses is just fine.

> If later I add other subclasses with their own special needs, the
> entanglement will just get worse.

If you do this, then yes.  Are you going to?  (Yes, you can feel an XP
flavour to my thoughts...).

The idea that sometimes seems to appear of almost doing battle with
your subclasses seems particularly misguided.

[...]

> I'm guessing that there is some well known pattern that addresses this
> issue, but I don't know what it is.  Does anyone have suggestions for
> architecture that provides a good solution?

well, 

class Sup(object):
   def __init__(self):
      self.specialFlag = False
   def aMeth(self):
       <do some stuff>
       self.doSpecialThing()
       <do more stuff>
   def doSpecialThing(self):
       pass

class Sub(Sup):
   def doSpecialThing(self):
       <do a special thing>

kind of suggests itself, but it's hard to say out of context whether
it applies.  You might enjoy reading Alex Martelli's talk on the
template design pattern that he gave at EuroPython 2003:

    http://www.strakt.com/docs/ep03_pydp.pdf

Cheers,
mwh

-- 
  ARTHUR:  Yes.  It was on display in the bottom of a locked filing
           cabinet stuck in a disused lavatory with a sign on the door
           saying "Beware of the Leopard".
                    -- The Hitch-Hikers Guide to the Galaxy, Episode 1


From mir4uu at yahoo.com  Wed Jan  7 11:08:55 2004
From: mir4uu at yahoo.com (mir nazim)
Date: 7 Jan 2004 08:08:55 -0800
Subject: Twisted or Medusa or Zope
Message-ID: <425cc8d1.0401070808.14690325@posting.google.com>

hi,
i m planning to start writing intranet applications and want ur real
cool advices for choosing the correct platform. the choice is between
the three:

1. Twisted
2. Medusa
3. Zope
(i do not know any of the three).

i want u people to help me choose the correct platform. 
my questions are:

1. which has the least learning curve.
2. which is best suited for the purpose for applications like workflow
automation, groupware, and other business related apps.

please also highlight the major diffrences between the three. 
also tell if there is a better alternative.

thanks in advance.


From google at axiomatize.com  Thu Jan 15 17:19:33 2004
From: google at axiomatize.com (Laurent Therond)
Date: 15 Jan 2004 14:19:33 -0800
Subject: Binary strings, unicode and encodings
References: <265368cb.0401151138.37a3a47b@posting.google.com>
	<4006F13C.7D432B98@engcorp.com>
Message-ID: <265368cb.0401151419.7663823e@posting.google.com>

Peter Hansen <peter at engcorp.com> wrote in message news:<4006F13C.7D432B98 at engcorp.com>...
> The above is confusing.  Why not just do
> 
> def bencode_rec(x, b):
>     assert type(x) is str
>     b.write(.....)
> 
> Why the if/else etc?

That's a code extract. The real code was more complicated.

> This is Python.  Why not try it and see?  I wrote a quick test at
> the interactive prompt and concluded that StringIO converts to 
> strings, so if your input is Unicode it has to be encodeable or 
> you'll get the usual exception.

Good point. Sorry, I don't have those good reflexes--I am new to
Python.

So, your test revealed that StringIO converts to byte strings.
Does that mean:
    - If the input string contains characters that cannot be encoded
in ASCII, bencode_rec will fail?

Yet, if your locale specifies UTF-8 as the default encoding, it should
not fail, right?

Hence, I conclude your test was made on a system that uses ASCII/ISO
8859-1 as its default encoding. Is that right?

> > a) A sequence of bytes where each byte represents an ASCII character
> 
> Yes, provided your input is exclusively ASCII (7-bit) data.

OK.

> > b) A sequence of bytes where each byte represents the UTF-8 encoding of a
> > Unicode character
> 
> Yes, if UTF-8 is your default encoding and you're using Unicode input.

OK.

> > c) It depends on the system locale/it depends on what the site module
> > specifies using setdefaultencoding(name)
> 
> Yes, as it always does if you are using Unicode but converting to byte strings
> as it appears StringIO does.

Umm...not sure here...I think StringIO must behave differently
depending on your locale and depending on how you assigned the string.

Thanks for your help!

L.


From mi-mal at o2.pl  Mon Jan 12 06:37:10 2004
From: mi-mal at o2.pl (Mimal)
Date: Mon, 12 Jan 2004 12:37:10 +0100
Subject: CGI module problem: duplicated output
In-Reply-To: <40027E9F.2010209@pollenation.net>
References: <mailman.219.1073658628.12720.python-list@python.org>	<9smuvv0ou8qpilg9vlpgpqt45apalmur49@4ax.com>	<mailman.288.1073895526.12720.python-list@python.org>	<jvtMb.409$L97.222@news.get2net.dk>	<bttt36$hn6$1@sea.gmane.org>
	<40027E9F.2010209@pollenation.net>
Message-ID: <btu0rn$p1s$1@sea.gmane.org>

> Check there is no cgi.pyc from when the script was still called cgi.py.

Thanks a lot!!! That was it! I should think about the name of the 
script. I knew it must be something silly. :-)

-- 
Mimal





From edcjones at erols.com  Thu Jan 22 09:48:46 2004
From: edcjones at erols.com (Edward C. Jones)
Date: Thu, 22 Jan 2004 09:48:46 -0500
Subject: [Numpy-discussion] Status of Numeric
In-Reply-To: <8g7u001k257pr6tjl3ng9t7pn3gvbq2328@4ax.com>
References: <CEELJPECNGEGKFNDLHFFGEBKCCAA.perry@stsci.edu>	<mailman.533.1074574795.12720.python-list@python.org>	<bumghc$dsb$1@nrc-news.nrc.ca>
	<vpmt0058gq2hj2q8jh8pakm9d80eridvmv@4ax.com>
	<mailman.617.1074727375.12720.python-list@python.org>
	<8g7u001k257pr6tjl3ng9t7pn3gvbq2328@4ax.com>
Message-ID: <400fe3c5$0$3036$61fed72c@news.rcn.com>

Arthur wrote:
> On Wed, 21 Jan 2004 16:22:43 -0700, Tim Hochberg
> <tim.hochberg at ieee.org> wrote:
> 
> 
>>Arthur wrote:
 >
>>The first is that last I heard the crossover point where 
>>Numarray becomes faster than Numeric is about 2000 elements. It would be 
>>nice if that becomes smaller, but I certainly wouldn't call it extreme. 
>>In fact I'd venture that the majority of cases where numeric operations 
>>are a bottleneck would already be faster under Numarray. In my 
>>experience, while it's not uncommon to use short arrays, it is rare for 
>>them to be a bottleneck.
> 
> 
> Couldn't one argue that - for example - in 3d graphic applications the
> performance as to short arrays is crucial.

In some numerical / graphing packages, there are specialized, fast, 
fixed-size arrays for sizes less than 4 by 4.


From NOusenetSPAM at gdargaud.net  Wed Jan 21 09:25:54 2004
From: NOusenetSPAM at gdargaud.net (Guillaume Dargaud)
Date: Wed, 21 Jan 2004 15:25:54 +0100
Subject: Checking for duplicate instances of a script...
References: <400e4638$0$19274$626a54ce@news.free.fr>
	<4ywu7l5v76.fsf@skjellgran.ii.uib.no>
Message-ID: <400e8bfb$0$19294$626a54ce@news.free.fr>

> This can probably be done in *many* different ways, maybe there is
> even an agreed upon on best solution. This is a small suggestion
> based on fcntl.flock() (Unix only I am afraid):

Wrong prediction: it works fine in Cygwin under windows, but it doesn't on
my linux server...

Traceback (innermost last):
  File "./CounterTest.py", line 24, in ?
    fcntl.flock(lockH, fcntl.LOCK_EX | fcntl.LOCK_NB)
TypeError: illegal argument type for built-in operation


Cygwin:
2.3.3 (#1, Dec 30 2003, 08:29:25)
[GCC 3.3.1 (cygming special)]

Linux:
1.5.2 (#1, Jan 31 2003, 10:58:35)  [GCC 2.96 20000731 (Red Hat Linux 7.3 2

Is this too old ?

Maybe I'll try with os.open flags...
-- 
Guillaume Dargaud
http://www.gdargaud.net/
  "My goal is to be a meteorologist. But since I possess no training in
meteorology, I suppose I should try stock brokerage."    - Found in a
resume.




From max at NcOviSsPiAoMntech.com  Thu Jan 29 10:44:24 2004
From: max at NcOviSsPiAoMntech.com (max khesin)
Date: Thu, 29 Jan 2004 15:44:24 GMT
Subject: Pausing python programs
In-Reply-To: <40192a20$0$9389$ed9e5944@reading.news.pipex.net>
References: <40192a20$0$9389$ed9e5944@reading.news.pipex.net>
Message-ID: <sT9Sb.111921$cM1.19522974@twister.nyc.rr.com>

Graham wrote:

> How can I cause a python program to pause/suspend execution for a period of
> time?  I am checking status of an external system and only want to check
> every second as opposed to my current which checks may times a secnod and
> hogs my cpu in the process!!!
> 
> Thank you to anyone who can help.
> 
> Graham Smith
> 
> PeopleSoft Technical Team Leader
> OXFAM GB
> +44 (1865) 313255
> gsmith at oxfam.org.uk
> 
> 
> 
Sleep() (at least on windoze) will suspend your app from execution. From 
some experiments I think Python's time.sleep() uses it.
max


From EP at zomething.com  Mon Jan 12 22:01:02 2004
From: EP at zomething.com (EP)
Date: Mon, 12 Jan 2004 19:01:02 -0800
Subject: Problem with what raw_input() returns
In-Reply-To: <56f42e53.0401121746.39b9e4db@posting.google.com>
Message-ID: <5.2.0.9.0.20040112190013.0265a420@mail.zomething.com>

What do you get if you

 >>>  print one

?



At 05:46 PM 1/12/2004 -0800, sebb wrote:
>If I do the following script:
>
># -*- coding: cp1252 -*-
>one = "??"
>two = one.replace("?","a")
>
>print two # it prints aa as I expected
>
>
>But with the following script:
>
># -*- coding: cp1252 -*-
>one = raw_input() # When I run the script, I type ??
>two = one.replace("?","a")
>
>print two # it still prints ?? and I want it to print aa
>
>
>Can someone help me with that problem?
>Thanks
>--
>http://mail.python.org/mailman/listinfo/python-list




From emonk at slingshot.no.uce  Sat Jan 17 15:07:33 2004
From: emonk at slingshot.no.uce (Corey Murtagh)
Date: Sun, 18 Jan 2004 09:07:33 +1300
Subject: ProtoCiv: porting Freeciv to Python CANNED
In-Reply-To: <m3hdyvswui.fsf@tanelorn.bandersnatch.org>
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
	<m3hdyvswui.fsf@tanelorn.bandersnatch.org>
Message-ID: <1074370049.790131@radsrv1.tranzpeer.net>

Nick Vargish wrote:
> "Brandon J. Van Every" <try_vanevery_at_mycompanyname at yahoo.com> writes:
<snip>
>>Or requiring Cygwin or MinGW, which real Windows developers don't want to
>>use.
> 
> Where "real Windows developers" == "Brandon Van Every". I see plenty
> of open source Windows projects with compilation instructions that
> require the use of Cygwin or MinGW. 

Actually I kind of agree here.  I've had plenty of problems with Cygwin 
- although less with MinGW.  An OSS project that requires a Linux 
emulation shim to run on any other platform is not, IMHO, cross-platform 
at all.

-- 
Corey Murtagh
The Electric Monk
"Quidquid latine dictum sit, altum viditur!"



From fa_pinkse at msn.com  Sat Jan 24 04:19:20 2004
From: fa_pinkse at msn.com (fa_pinkse at msn.com)
Date: 24 Jan 2004 01:19:20 -0800
Subject: Boa: printing source in the Editor
References: <4jwOb.40507$DF4.24648@amsnews02.chello.com>
	<bue48i$dts$1@online.de>
Message-ID: <a7c37c27.0401240119.55239fd0@posting.google.com>

Uwe Grauer <news at grauer-online.de> wrote in message news:<bue48i$dts$1 at online.de>...

> > 
> Using boa 0.2.8 i see Print under the Edit menu of the Editor.
> 
> Uwe

Thanks Uwe, 

It took me awhile to get the latest version. Now I can print.

with best regards,


Frans.


From sandysj at juno.com  Tue Jan 20 12:41:36 2004
From: sandysj at juno.com (Jeff Sandys)
Date: Tue, 20 Jan 2004 17:41:36 GMT
Subject: Fw: PDF library for reading PDF files
References: <mailman.464.1074430854.12720.python-list@python.org>
	<400BFF7B.95F21050@netsurf.de>
	<mailman.534.1074585531.12720.python-list@python.org>
Message-ID: <400D6850.C7BB72D6@juno.com>

Peter Galfi wrote:
> 
...
> The "information" I am trying to extract from the PDF file is the text, 
> specifically in a way to keep the original paragraphs of the text.
...
> 
> Any suggestions?

Ghostscript has an Extract Text capability that I have used 
successfully on some pdf files (but not on some others):
     http://www.cs.wisc.edu/~ghost/

Thanks,
Jeff Sandys


From deets_noospaam at web.de  Fri Jan 30 11:39:27 2004
From: deets_noospaam at web.de (Diez B. Roggisch)
Date: Fri, 30 Jan 2004 17:39:27 +0100
Subject: easiest transition for a PHP website to move to Python?
References: <mailman.1023.1075441969.12720.python-list@python.org>
Message-ID: <bve1bv$3gn$02$1@news.t-online.com>

> I've got a database-driven website that's written entirely in PHP.
> 
> It's all pretty MVC : NOT embedded little calls inside HTML, but
> rather little controller apps in the webroot that merge data with
> HTML templates on the fly.
> 
> But for various reasons (mostly fun) I want to rewrite it in Python.
> 
> There are so many different approaches, though!  Zope, Twisted,
> mod_python, clearsilver, and all the goodies in standard library.

Regardless my answer to Lothar's posting (which is about zope not beeing
python), I agree with him that webware appears to be close to what you are
expecting from a web-framework. So the transition to webware might be the
easiest, if you want to do it as straight-forward  as possible. Mind you, I
never worked with webware so far, but it looks promising.

However, ZOPE has a different approach. Its outstanding feature is the
built-in database ZODB. This is a hierarchical strucured object-orientied
database with versioning. It stores everything - app-logic, templates and
data. Together with CMF/Plone or ZMS, there exist nice and clean
dublin-core aware data-from-layout-abstractions. Setting up a blog or even
much more complicated, content driven website is only a matter of a few
clicks. All editing of content is done via the webbrowser, and as zope
comes with its own user-model, its easy for you as admin to create new
accounts and grant fine-grained access to your sites for their respective
authors/editors/whatever.

So I would definitly advise you to take a look at zope - install it and play
around with it, especially with plone or zms. 

But as said before - if you are actually seeking for the smoothest
transition, you might be better off with webware. 

Regards,

Diez


From michael at foord.net  Thu Jan 29 03:34:37 2004
From: michael at foord.net (Fuzzyman)
Date: 29 Jan 2004 00:34:37 -0800
Subject: Simple Database Package
References: <mailman.911.1075300017.12720.python-list@python.org>
Message-ID: <8089854e.0401290034.4d57a45d@posting.google.com>

Pieter Claerhout <Pieter.Claerhout at Creo.com> wrote in message news:<mailman.911.1075300017.12720.python-list at python.org>...
> Take a look at:
> MetaKit: http://www.equi4.com/metakit/
> SQLite: http://www.sqlite.org/
> 
> Cheers,
> 
> 
> pieter


Thanks....
I don't know what it is - but I asked a couple of questions here
yesterday... and seem to have received a lot of help from peopel
called Peter..... sounds suspiciously like a conspiracy to me :-)

Anyway - I couldn't decide between SQLobject and metakit (I'd already
seen sqlite but wanted some advuice before I chose one to dive
into..).

Anyway - the windows download for SQLobject is zero sized - so I've
gone for metakit and will have  a play.

Fuzzy

> -- 
> 
> http://www.Voidspace.org.uk The Place where headspace meets
> cyberspace. Online resource site - covering science, technology,
> computing, cyberpunk, psychology, spirituality, fiction and more.
> 
> --- 
> 
> http://www.voidspace.org.uk/atlantibots/pythonutils.html
> The home of Python dateutils - dateutils, ConfigObj, StandOut,
> CGI-News etc


From jacek.generowicz at cern.ch  Thu Jan  8 07:46:27 2004
From: jacek.generowicz at cern.ch (Jacek Generowicz)
Date: 08 Jan 2004 13:46:27 +0100
Subject: Descriptor puzzlement
References: <vvqjj92il4o1d0@news.supernews.com>
Message-ID: <tyfk742fw0s.fsf@pcepsft001.cern.ch>

"John Roth" <newsgroups at jhrothjr.com> writes:

> It doesn't look like the descriptor protocol is getting
> invoked at all.
> 
> What's happening here?

Try changing the following

> class AnotherObject(object):
>     def __init__(self):
>         self.prop = AnObject("snafu")

to 

  class AnotherObject(object):
      prop = AnObject("snafu")



From staff-admin at cis.ohio-state.edu  Wed Jan 28 12:34:02 2004
From: staff-admin at cis.ohio-state.edu (staff-admin at cis.ohio-state.edu)
Date: Wed, 28 Jan 2004 12:34:02 -0500
Subject: Your message to Staff awaits moderator approval
Message-ID: <20040128173402.4504.66121.Mailman@mail.cis.ohio-state.edu>

Your mail to 'Staff' with the subject

    TEST

Is being held until the list moderator can review it for approval.

The reason it is being held:

    Message has a suspicious header

Either the message will get posted to the list, or you will receive
notification of the moderator's decision.



From francisgavila at yahoo.com  Sun Jan 11 14:03:26 2004
From: francisgavila at yahoo.com (Francis Avila)
Date: Sun, 11 Jan 2004 14:03:26 -0500
Subject: readling newlines
References: <IXTLb.87546$_P.3280883@news4.tin.it>
	<pan.2004.01.11.07.46.06.218273@yahoo.com>
Message-ID: <10037hsb7bqp1d4@corp.supernews.com>

Samuel Walters wrote in message ...
>
>Not quite sure what "U" mode is, but try adding the "b" mode when opening

FYI, 'U' is universal newline mode, which will quietly convert the newline
convention of a file into '\n'.  I think it has some rudamentary ability to
handle mixed-convention newline ugliness.

See the documentation on file() in the library reference, and there's a PEP
on the feature, too.

--
Francis Avila



From mwh at python.net  Thu Jan 15 06:15:51 2004
From: mwh at python.net (Michael Hudson)
Date: Thu, 15 Jan 2004 11:15:51 GMT
Subject: Cyclic garbage collection and segfaults...
References: <pan.2004.01.14.20.21.41.430958@birc.dk>
Message-ID: <m3brp5wjh5.fsf@pc150.maths.bris.ac.uk>

"Thomas Mailund" <mailund at birc.dk> writes:

> Hi group.
> 
> I have a problem with some C extensions I am working with and
> hope that some of you can help.  

[snippety]

> static void
> Simple_dealloc(SimpleObject *self)
> {
>     fprintf(stderr,"Simple_dealloc %p\n", self);
>     self->ob_type->tp_free((PyObject*)self); /* <= segfault here */

Well, you're calling tp_free from a tp_dealloc.  That doesn't *sound*
sensible to me.

> Can anyone explain what I'm doing wrong?  Or perhaps suggest a better
> solution to my "real" problem, if I'm approaching the problem completely
> wrong :-)

There are docs on this sort of thing.

Cheers,
mwh

-- 
 "Sturgeon's Law (90% of everything is crap) applies to Usenet."
 "Nothing guarantees that the 10% isn't crap, too."
                -- Gene Spafford's Axiom #2 of Usenet, and a corollary


From dripton at wizard.net  Sat Jan 24 22:12:59 2004
From: dripton at wizard.net (David Ripton)
Date: 24 Jan 2004 19:12:59 -0800
Subject: Compiling DCOracle2 on RH Linux 8.0
References: <ab425431.0401211512.6c698e00@posting.google.com>
Message-ID: <8725c51c.0401241912.316a7cfc@posting.google.com>

reidyre at yahoo.com (Ron Reidy) wrote in message news:<ab425431.0401211512.6c698e00 at posting.google.com>...

> I am trying to compile DCOracle2 on RedHat 8.0 and make is giving me
> the following error:
> 
> gcc -pthread -fPIC -DNDEBUG -g -O3 -Wall -Wstrict-prototypes
> -I/usr/local/include/python2.3 -I/usr/local/include/python2.3 @DEFS@  
> -I/oracle/app/oracle/9i/rdbms/demo
> -I/oracle/app/oracle/9i/network/public
> -I/oracle/app/oracle/9i/plsql/public
> -I/oracle/app/oracle/9i/rdbms/public -DORACLE9i -c ././dco2.c -o
> ./dco2.o
> gcc: cannot specify -o with -c or -S and multiple compilations
> 
> 
> Did I do something wrong?

No.  The DCOracle2 build process isn't very robust.

Look at src/Makefile.  Find a line that says "DEFS=%DEFS" and change
it to "DEFS=-fno-strict-aliasing"


From peter at engcorp.com  Wed Jan 21 14:30:30 2004
From: peter at engcorp.com (Peter Hansen)
Date: Wed, 21 Jan 2004 14:30:30 -0500
Subject: Reading BLOB
References: <400e3510.18785312@news.eunet.be> <400E8AB0.9D4DEB79@engcorp.com>
	<400ea2c0.46864796@news.eunet.be>
Message-ID: <400ED356.A0621A6C@engcorp.com>

Johan.Vervoort at utimaco.be wrote:
> 
> This is the sample code: It should dump all the certificates to the
> certs directory...
> What I suspect is that python thinks that the certif field is a STRING
> and it's truncated when the first '\0' occurs...
> (The data is stored completely in the database as an equivalent
> C-program works fine...)

Python itself does not care about '\0' in a string, and will happily
handle strings with any kind of binary data.

At the least, then you need to look lower, perhaps at the ODBC wrapper
code itself, perhaps at the database schema or something.  Are there
multiple types of string that can be stored in the database, and you've
picked one that is effectively null-terminated?  Or, wait a minute, your
subject line is "reading BLOB", yet you are dealing with strings in
some way, given this:

>>> reload (Test)
[('csernum', 'STRING', 80, 80, 0, 0, 0), ('certif', 'STRING', 0,
2147483647, 0, 0, 0)]

Surely that is the cause of the problem, at least indirectly?  Isn't
there some kind of BLOB data type instead?

-Peter


From cookedm+news at physics.mcmaster.ca  Mon Jan 26 17:38:22 2004
From: cookedm+news at physics.mcmaster.ca (David M. Cooke)
Date: Mon, 26 Jan 2004 17:38:22 -0500
Subject: Newbie : innerproduct function from Numarray
References: <bv40rm$ra$1@news.Stanford.EDU>
Message-ID: <qnkr7xmibdt.fsf@arbutus.physics.mcmaster.ca>

At some point, "Ohkyu Yoon" <okyoon at stanford.edu> wrote:

> I have two vectors that have about 2000 elements.
> I need to calculate the innerproducts of those vectors 2000 times where
> one of them cycles left(ie 1234, then 2341, then 3412, etc)
> Basically, I want to calculate A*x, where A is a left-circulant cyclic
> matrix,
> and x is a vector.
>
> I tried it two ways.
> vector1 & vector2 are lists.
                        ^^^^^^

This is your problem: everytime you pass these to innerproduct, it
turns them into arrays (which, with the current version of numarray,
is a relatively expensive operation).

Try something like

import numarray as na
output = []
vector1 = na.array(vector1)
vector2 = na.array(vector2)
temp = na.concatenate((vector1,vector1)) # temp is twice the length of vector1
for i in range(2000):
    output.append(na.innerproduct(temp[i:(i+2000)],vector2)

This uses arrays always.

You might be better off explicity constructing your left-circulant
cyclic matrix A, and doing the full matrix multiply -- for this size
of matrix, the multiply is going to be fast (because it's going to be
done by code written in C, and, depending on how you set it up, using
an optimized BLAS routine).

-- 
|>|\/|<
/--------------------------------------------------------------------------\
|David M. Cooke
|cookedm(at)physics(dot)mcmaster(dot)ca


From peter at engcorp.com  Thu Jan 29 09:44:25 2004
From: peter at engcorp.com (Peter Hansen)
Date: Thu, 29 Jan 2004 09:44:25 -0500
Subject: Python & XML & DTD (warning: noob attack!)
References: <pan.2004.01.29.13.04.44.213048.2804@obda.net>
Message-ID: <40191C49.786AAF89@engcorp.com>

Igor Fedorow wrote:
> 
> I have an XML file with an internal DTD which looks roughly like this:
> [snip]
> I want to parse this file into my application, modify the data (this includes
> maybe creating and/or deleting nodes), and write it back into the file --
> including the DTD. (It doesn't necessarily need validation, though.)
> 
> I tried xml.dom.ext.PrettyPrint, but it produces only
> [snip]
> actually lacking the document type definition.
> 
> Any help is appreciated!

Unfortunately I don't know of any way you could generate the DTD again, 
and I've never seen a package which supports what you ask for (not that
it isn't possible, mind you).

On the other hand, are you sure you need the DTD?  We use XML in
dozens of ways and absolutely have never benefited from attempts 
to use DTDs, and don't appear to suffer from the lack thereof.  

Also, aren't DTDs sort of considered either obsolete or at least
vastly inferior to the newer approaches such as XML Schema, or both?

So my recommendation is to ditch the DTD and see if any problems 
arise as a result.

-Peter


From james at logicalprogression.net  Fri Jan 16 17:41:07 2004
From: james at logicalprogression.net (James Henderson)
Date: Fri, 16 Jan 2004 22:41:07 +0000
Subject: Bug or feature?
In-Reply-To: <20040116191853.GA27129@intarweb.us>
References: <bu58st$1ha3$1@news.rtcomm.ru>
	<200401161613.06481.james@logicalprogression.net>
	<20040116191853.GA27129@intarweb.us>
Message-ID: <200401162241.07500.james@logicalprogression.net>

On Friday 16 January 2004 7:18 pm, Jp Calderone wrote:
>   Of course, it should be noted that, in Python, "a += b" is only sometimes
> synonymous with "a = a + b".  The rest of the time, it's hard to say what
> it is synonymous with :)

What do you have in mind?  J.
-- 
James Henderson, Logical Progression Ltd.
http://www.logicalprogression.net/
http://sourceforge.net/projects/mailmanager/




From spamtrap at bigfoot.com  Fri Jan 30 03:51:45 2004
From: spamtrap at bigfoot.com (zde)
Date: Fri, 30 Jan 2004 09:51:45 +0100
Subject: comparing booleans
In-Reply-To: <4019BBDE.D4429EDF@alcyone.com>
References: <mailman.951.1075324969.12720.python-list@python.org>
	<40185112.264898A4@alcyone.com>
	<eaa90cc908c7a217f0d6475e41c7622d@news.teranews.com>
	<4019BBDE.D4429EDF@alcyone.com>
Message-ID: <bvd5v5$13tj$1@news.nextra.cz>

Erik Max Francis wrote:
 
> This is because of operator chaining, which only exists a special case
> for the relational operators (==, !=, <, <=, >, >=).  It's not actually
> a difference in the truth table; it's because chaining operators behave
> differently than other operators.

Unfortunately, this mis-feature works for other operators as well:
Since 'in' operator usually has higher precedence than '==', it's
pretty annoying to see:

Python 2.3.3 (#2, Jan  4 2004, 12:24:16) 
>>> 'a' in 'abc'
True
>>> 'a' in 'abc' == True
False
>>> 



From stephendotboulet at motorola_._com  Mon Jan 26 10:51:02 2004
From: stephendotboulet at motorola_._com (Stephen Boulet)
Date: Mon, 26 Jan 2004 09:51:02 -0600
Subject: Single and double asterisks preceding variables in function
	arguments
Message-ID: <bv3d4e$1h7$1@newshost.mot.com>

I've run across code like "myfunction(x, *someargs, **someotherargs)", 
but haven't seen documentation for this.

Can someone fill me in on what the leading * and ** do? Thanks.

Stephen


From myles at geocities.com  Tue Jan 13 19:57:41 2004
From: myles at geocities.com (Myles)
Date: 13 Jan 2004 16:57:41 -0800
Subject: Calling dlls with Calldll/WinDll or Ctypes or...
References: <9b849915.0312172302.7999d44a@posting.google.com>
Message-ID: <a4638b9b.0401131657.1953851f@posting.google.com>

> Pardon my ignorance here.  I would like to talk to someone that has
> had success in calling ddls in Windows NT/2000/XP.

caldll works, but the more recent ctypes is easier to use.

The ctypes documentation has nice examples for calling functions
exported by standard Windows DLLs (i.e. Microsoft ones that are
supplied with Windows).
Below are a couple of examples of calling third-party DLLs.

Regards, Myles.

# ------------------ snip ------------------------

from ctypes import *
import time

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

anotherdll = windll.AutoItDLL  # loads AutoItDLL.dll (in same directory)

# AutoItDLL.dll exports a function AUTOIT_ClipPut
anotherdll.AUTOIT_ClipPut(c_char_p("something"))

# AutoItDLL.dll exports a function AUTOIT_ClipGet
s = c_buffer(16384)  # size of clipboard buffer
time.sleep(2)  # apparently it takes a while to create that buffer ?
anotherdll.AUTOIT_ClipGet(s)
print repr(s.value)

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

somedll = windll.FreeImage  # loads FreeImage.dll (in same directory)

# some DLLs export function names strangely 
# (open the .dll in a capable text editor to read the function names)
GetVersion = getattr(somedll, "_FreeImage_GetVersion at 0")
GetVersion.restype = c_char_p
print GetVersion()

GetFileType = getattr(somedll, "_FreeImage_GetFileType at 8")
filename = "/temp/screen01.jpg"
imgtype = GetFileType(filename, 0)

Load = getattr(somedll, "_FreeImage_Load at 12")
image_ptr = Load(imgtype, filename, 0)

GetWidth = getattr(somedll, "_FreeImage_GetWidth at 4")
print GetWidth(image_ptr)

# --------------- snip ---------------------------


From aahz at pythoncraft.com  Thu Jan 29 21:01:05 2004
From: aahz at pythoncraft.com (Aahz)
Date: 29 Jan 2004 21:01:05 -0500
Subject: Safe to modify globals(), or not?
References: <6714766d.0401291559.45413e0d@posting.google.com>
Message-ID: <bvcdt1$8t4$1@panix3.panix.com>

In article <6714766d.0401291559.45413e0d at posting.google.com>,
Robert Dodier <robert_dodier at yahoo.com> wrote:
>
>In reading through old posts to this newsgroup, I see there is
>an often-repeating warning against modifying the contents of locals().
>Fair enough. However, is there anything wrong with modifying globals()
>?

Not wrong, exactly, but there may well be in the future, and there are
better ways currently.

>By the way, is there another way to introduce a new variable into
>a scope (local or global) other than assigning directly to the 
>dictionary returned by locals() or globals() ?

For locals, it's a lot trickier, but you're less likely to want to do
that.

>Just some context -- I want to parse strings written in a 
>"little language" and then have new variables show up in the Python
>environment so the user can manipulate them. E.g.,
>
>  >>> parse_funky_language("Hey, this is far out, man.")
>  >>> Hey.part_of_speech
>  Interjection

import __main__
tmp = parse_funky_language("Hey, this is far out, man.")
setattr(__main__, tmp.name, tmp.value)

In the context of the interactive interpreter, it's a bit harder to do;
I don't remember off-hand what the namespace of the interpreter is.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

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


From bart_nessux at hotmail.com  Tue Jan 27 19:47:39 2004
From: bart_nessux at hotmail.com (Bart Nessux)
Date: Tue, 27 Jan 2004 19:47:39 -0500
Subject: threads
In-Reply-To: <mailman.856.1075213416.12720.python-list@python.org>
References: <bv5qu7$hap$1@solaris.cc.vt.edu>
	<mailman.856.1075213416.12720.python-list@python.org>
Message-ID: <401706AB.6020703@hotmail.com>

Thank you both for the info on threads in Python it was very helpful to 
me, I've written something that I think can benefit from threading... 
here is the code, I copied this from a few books and a few Web examples 
and modified it to suit my test:

class trivialthread(threading.Thread):
    def url_open(self):
       for x in xrange(999999):
          f = urllib.urlopen("http://xxx.xxx.xxx")
          f.read()
          f.close()
          print self, x

if __name__ == '__main__':
    threads = []
    for x in range(15):
       thread = trivialthread()
       threads.append(thread)
    for thread in threads:
        thread.start()
    while threading.activeCount() > 0:
        print str(threading.activeCount()), "threads running incl. main"
        time.sleep(1)

However, when this runs, the output looks like this:

16 threads running incl. main
1 threads running incl. main
1 threads running incl. main
1 threads running incl. main
1 threads running incl. main
1 threads running incl. main
1 threads running incl. main
...
...

Why does the 16 appear initially and then be replaced by 1? Are there no 
longer 16 threads running? If so, why not?

TIA!!!



From cpl.19.ghum at spamgourmet.com  Sun Jan 18 13:54:40 2004
From: cpl.19.ghum at spamgourmet.com (Harald Massa)
Date: Sun, 18 Jan 2004 19:54:40 +0100
Subject: Fw: PDF library for reading PDF files
References: <mailman.464.1074430854.12720.python-list@python.org>
Message-ID: <Xns9474CBDE9B2D7cpl19ghumspamgourmet@62.153.159.134>

> I am looking for a library in Python that would read PDF files and I
> could extract information from the PDF with it. I have searched with
> google, but only found libraries that can be used to write PDF files. 

reportlab has a lib called pagecatcher; it is fully supported with python, 
it is not free.

Harald


From mark at diversiform.com  Fri Jan  2 15:49:08 2004
From: mark at diversiform.com (mark)
Date: Fri, 2 Jan 2004 12:49:08 -0800
Subject: Can this be reversed (Tkinter)?
Message-ID: <002d01c3d171$df2920b0$5501a8c0@markxp>

I am looking at the format used by root.geometry().  The string returned
from root.geometry() is "%dx%d+%d+%d".  Is there a quick and painless
way to extract the values from that string (i.e., "100x150+25+25" =>
(100,150,25,25))?
 
- Mark
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From fumanchu at amor.org  Fri Jan  2 16:13:29 2004
From: fumanchu at amor.org (Robert Brewer)
Date: Fri, 2 Jan 2004 13:13:29 -0800
Subject: how to import a module dynamically
Message-ID: <DE1CF2B4FEC4A342BF62B6B2B334601E561BB9@opus.amorhq.net>

Randall Smith wrote:
> How do I import a module when given the module name as input?
> 
> Between __import__, imp, and rexec, I'm very lost.  What I want to do 
> seems so simple, but I don't know the best way to do it.

I was very lost, too, once upon a time. I wrote my eventual solution for
this into a Python Cookbook recipe:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/223972

...which is geared toward importing when you know the full package name,
for example "myapp.tools.utilities". Feel free to hack it up for your
own study and/or use.


Robert Brewer
MIS
Amor Ministries
fumanchu at amor.org



From prof_888 at hotmail.com  Fri Jan  9 16:41:53 2004
From: prof_888 at hotmail.com (ChrisD)
Date: 9 Jan 2004 13:41:53 -0800
Subject: unable to register PythonService.exe
References: <c168f829.0401081436.48e2f920@posting.google.com>
	<y8shti16.fsf@python.net>
Message-ID: <c168f829.0401091341.421facb1@posting.google.com>

> 
> Looks like a bug to me, it behaves the same for me.
> 
> OTOH, it seems that it's not required to do this registration since the
> sample PythonTestService.py works fine for me.
> 

It works for me, too!  I didn't even think of trying that.  It does
appear that the installation program registered PythonService.exe -
which the book says it does... I obviously didn't pay enough attention
to that!

Thanks for helping me figure that out.


Chris


From oren-py-l at hishome.net  Fri Jan 16 15:33:49 2004
From: oren-py-l at hishome.net (Oren Tirosh)
Date: Fri, 16 Jan 2004 15:33:49 -0500
Subject: data structures module
In-Reply-To: <bu99bj$o98$1@panix1.panix.com>
References: <92c59a2c.0401152306.1c6a17f5@posting.google.com>
	<bu99bj$o98$1@panix1.panix.com>
Message-ID: <20040116203349.GA36773@hishome.net>

On Fri, Jan 16, 2004 at 01:08:51PM -0500, Aahz wrote:
> In article <92c59a2c.0401152306.1c6a17f5 at posting.google.com>,
> MetalOne <jcb at iteris.com> wrote:
> >
> >Today, I wanted a priority queue.
> >I notice that Python does not have any sorted lists.
> >I know that I can call list.sort(), but that seems rather inefficient
> >to call every time an element is added.
> >I am wondering why there is not a module or modules containing many
> >common data structures.  Has such a thing been decided against?  Is it
> >that just nobody has done it?  Has nobody else suggested the need for
> >it?  Maybe I should search, but I am too tired now, I need sleep.
> 
> There's a current discussion on python-dev about a "collections" module
> or package, and that's one of the structures under discussion.

The major thread of the discussion there is about enhancing the built in 
list type to handle popping the first item more efficiently behavior) so 
the append/pop() idiom of implementing a queue will work in amortized O(1)
time. 

I like the general direction this is going - no new basic data types. 
Lists and dicts are sufficient for 98% of all will we ever need. The
remaining 2% can mostly be implemented in Python because it's rarely 
performance-critical. The remaining cases are probably better handled by
specialized extension modules anyway (e.g. jkbuckets)

Oren




From peter at engcorp.com  Tue Jan  6 08:56:28 2004
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 06 Jan 2004 08:56:28 -0500
Subject: Launching pdb from within a script
References: <UNYJb.14065$Od5.5161@news-binary.blueyonder.co.uk>	<bt9mhl$9k2$06$1@news.t-online.com>	<MHZJb.14962$Od5.2841@news-binary.blueyonder.co.uk>	<bOZJb.15107$Od5.11731@news-binary.blueyonder.co.uk>
	<bt9t94$q60$07$1@news.t-online.com>
	<mailman.84.1073251855.12720.python-list@python.org>
Message-ID: <3FFABE8C.126E2E92@engcorp.com>

"Mike C. Fletcher" wrote:
> 
> Peter Otten wrote:
> 
> >Graham Nicholls wrote:
> >
> >
> ...
> 
> >>But pdb complains that there are no such variables.  It may be that I had
> >>to add some incantation around the script startup - I just can't remember
> >>(and its frustrating!).
> >>
> >>
> ...
> 
> >-> Pdb().set_trace()
> >(Pdb) abc
> >*** NameError: name 'abc' is not defined
> >(Pdb) u
> >
> >
> This is the key line, 'n' would work as well.  The reason your variables
> weren't being found is that you were still inside the call to
> set_trace().  You need to return from that (either by going "u"p to the
> calling context, or to the "n"ext instruction, which returns to the
> calling context by finishing the set_trace() call).

"r" (for "return") works as well....  

Wow!  Three obvious ways to do the same thing. ;-)

-Peter


From fuf at mageo.cz  Wed Jan 28 10:48:00 2004
From: fuf at mageo.cz (Michal Vitecek)
Date: Wed, 28 Jan 2004 16:48:00 +0100
Subject: fast deep-copying of instances
In-Reply-To: <DE1CF2B4FEC4A342BF62B6B2B334601E561C8C@opus.amorhq.net>
References: <DE1CF2B4FEC4A342BF62B6B2B334601E561C8C@opus.amorhq.net>
Message-ID: <20040128154800.GB11485@foof.i3.cz>

Robert Brewer wrote:
>Michal Vitecek wrote:
>>  hello,
>> 
>>  i have a data cache which sits between a slow database and 
>> my server and
>>  it's used to cache data retrieved from the database. in 
>> order for it to
>>  work correctly (race-conditions) i need a fast deep-copying of
>>  instances (the cache is used heavily).
>> 
>>  i tried to use copy module but it's *very* slow, then i tried cPickle
>>  to pickle and depickle instances which was faster, but still slow.
>>  
>>  then i've come across cCopy which is 8x faster than copy, but
>>  unfortunately it doesn't work with new style classes because type()'s
>>  return is crappy for them. so the question is: does there 
>> exist a fast
>>  copy module which works with new style classes?
>
>If you don't find something pre-built, you can always build it yourself
>into the classes which you are caching, via __copy__ and __deepcopy__
>methods.:

 i know of this mechanism but
    a) i fear it would be still slower than cPickle and be quite time
       consuming to implement (lots of classes)
    b) cCopy is the C implementation of the copy module so it's
       "lightning" fast

 
 the current cCopy is at http://www.jessikat.fsnet.co.uk/cCopy.html . if
 someone would be so kind to add support for new style classes to it (or
 tell me how to do it), i'd be very very grateful.

        thank you,
-- 
		fuf		(fuf at mageo.cz)



From cookedm+news at physics.mcmaster.ca  Thu Jan 15 12:05:33 2004
From: cookedm+news at physics.mcmaster.ca (David M. Cooke)
Date: Thu, 15 Jan 2004 12:05:33 -0500
Subject: More than one python in a linux
References: <m165fdbp4t.fsf@llcpxqy.lc.ehu.es>
Message-ID: <qnkzncpnnvm.fsf@arbutus.physics.mcmaster.ca>

At some point, Zunbeltz Izaola <zunbeltz at wm.lc.ehu.es.XXX> wrote:

> Hi,
>
> I've build and installed  python 2.2 and python2.3 in a linux box.
> Now i want to install some packages (Numeric, wxPython and
> scipy). I've install Numeric and wxPython for python2.3 without
> problem (python2.3 setup.py install ... and so on). But when I try 
>
> python2.2 setup.py install
>
> I get the following error (for wxpython)
>
> running build_py
> copying wxPython/__version__.py -> build/lib.linux-i686-2.2/wxPython
> running build_ext
> error: invalid Python installation: unable to open
> /usr/lib/python2.2/config/Makefile (No such file or directory)

You probably don't have the development package for python2.2
installed (python2.2-dev or python2.2-devel or something).

-- 
|>|\/|<
/--------------------------------------------------------------------------\
|David M. Cooke
|cookedm(at)physics(dot)mcmaster(dot)ca


From swalters_usenet at yahoo.com  Sun Jan 18 10:48:38 2004
From: swalters_usenet at yahoo.com (Samuel Walters)
Date: Sun, 18 Jan 2004 15:48:38 GMT
Subject: Using python for _large_ projects like IDE
References: <930ba99a.0401180625.5863acd4@posting.google.com>
Message-ID: <pan.2004.01.18.15.47.05.688619@yahoo.com>

| Sridhar R said |
> 1. if python is used, then the memory required for running the IDE
> will be high.
> 2. if pure python is used, the IDE will be slower.
> 
> I'm not sure whether they are true.

Well, it depends on your definition of "high memory usage."  I had no
problems running GUI python apps on my old pentium 100mhz with 74 megs of
ram.  So, unless your program should be able to run on smaller systems, I
wouldn't worry much.

 
> Then I thought of using python for 90% of the code and using C for
> other performance critical part.  But the problem is in identifying
> the performance critical code.  People suggest to start with pure
> python and then _recode_ the performance critical code after profiling
> the original code.  But I fear whether there will be a conflit in say
> data structures.  Not yet expert in extending/embedding python.
> Are there any ways to forsee the performance critical parts?

Data structures are easier to handle than you'd think when extending
python.  I recommend either boost or pyrex.  I've used pyrex, but most
people seem to use boost.

There are great python profiling tools.  It's not at all difficult to find
the performance critical portions.

As far as advice on forseeing performance critical parts, keep in mind
that there are different standards for different portions of a program. 
An IDE would have many parts where interactivity is a concern.  Noone
likes to see their keystrokes appear two seconds after they have been
typed.  Things like syntax highlighting can form a bottleneck, but I've
seen enough apps that manipulate data like this that I know it can be
done.

There are other parts, such as search-and-replace that people are a bit
more patient about.  Try to separate the two types of functionality so
that they can be recoded independently.

HTH

Sam Walters.

-- 
Never forget the halloween documents.
http://www.opensource.org/halloween/
""" Where will Microsoft try to drag you today?
    Do you really want to go there?"""



From knoppix at laptop.home.net  Sun Jan 11 12:13:04 2004
From: knoppix at laptop.home.net (Knoppix User)
Date: Sun, 11 Jan 2004 11:13:04 -0600
Subject: [Newb] Still not able to solve class attribution
Message-ID: <pan.2004.01.11.16.18.09.483280@laptop.home.net>

Hi folks

I still have not been able to solve this one, which didn't manage to
garner a response yesterday, so I'm rephrasing it here. 

If I define an attribute in the __init__ statement of a class, I should be
able to access that attribute in a later method of that class, right?

I have run into a situation where that does not SEEM to happen [newbie
alert]. 

What should I be looking into to try to solve this bug, as I am SOL with
new ideas?!

Although I am using wx, I do not believe that this has anything to do with
wx, but with syntax / semantics.

Any thoughts are very much appreciated.

I copy the original question below, for convenience.

Steve




class GIP(wx.Frame):
    def __init__(self, parent, ID, title):
        wx.Frame.__init__(self, parent, ID, title, size = (600, 460))

        ....

       self.Image = wx.StaticBitmap(self, -1, wx.EmptyBitmap(*self.thumbSize),
            pos = (160,10))     <<<<<<<<<<<<<<<<<<<<I thunk I dunnit here!

       ....

    def DisplayImg(self, rot):
        self.SetStatusText('Current image: ' + self.jpgList[self.curJpg])
        img = wx.Image(self.jpgList[self.curJpg], wx.BITMAP_TYPE_JPEG)
        if rot == 90:
            img = img.Rotate90()
        elif rot == 180:
            img = img.Rotate(1, (0,0))
        elif rot == 270:
            img = img.Rotate(1.5, (0,0))
        img = self.ScaleImg(img)
        img = wx.BitmapFromImage(img)
        self.Image.SetBitmap(img)      <<<<<<<<<<<<<<<<<<<<<<<Problem
        self.txtFName.Clear()
        filen = self.GetFName(self.jpgList[self.curJpg])
        self.txtFName.WriteText(filen)
        self.txtDirName.SetLabel(self.dirName)


Traceback (most recent call last):
  File "/usr/lib/python2.3/site-packages/sm/scriptutils.py", line 49, in run
    exec codeObject in mainDict
  File "<source>", line 197, in ?
  File "/usr/lib/python2.3/site-packages/wxPython/wx.py", line 1951, in __init__
    _wxStart(self.OnInit)
  File "<source>", line 191, in OnInit
  File "<source>", line 78, in __init__
  File "<source>", line 116, in DisplayImg
AttributeError: GIP instance has no attribute 'Image'


From tim.one at comcast.net  Mon Jan 26 11:35:36 2004
From: tim.one at comcast.net (Tim Peters)
Date: Mon, 26 Jan 2004 11:35:36 -0500
Subject: Overriding compare in SequenceMatcher
In-Reply-To: <001a01c3e3fb$4d409380$7800a8c0@mailer>
Message-ID: <LNBBLJKPBEHFEDALKOLCGEBIIJAB.tim.one@comcast.net>

[Peter Galfi]
> I am trying to make a compare between two lists of numbers using the
> SequenceMatcher, however I would need somehow to override the method
> which is used by SequenceMatcher to determine if two elements of the
> list are equal or not.
>
> In my specific case a number of the list might be equivalent with
> another number of the list yet their values would be different.
>
> Any idea as to how what and how I can override or any workaround for
> this problem?

Elements of sequences are used internally as dict keys, so it's not enough
just to override comparison -- you also need to define a hash function
consistent with your idea of equality (objects that compare equal must
deliver the same hash codes).

So you need to wrap your numbers in a class, and define the class's __eq__
and __hash__ methods appropriately.  There's no need to define any
comparison method other than __eq__.




From wilkSPAM at OUTflibuste.net  Sat Jan 10 07:58:50 2004
From: wilkSPAM at OUTflibuste.net (Wilk)
Date: Sat, 10 Jan 2004 13:58:50 +0100
Subject: what is best for web development??
References: <f046efac.0401100358.5aa812a0@posting.google.com>
Message-ID: <87wu80559x.fsf@blakie.riol>

ketulp_baroda at yahoo.com writes:

> i am developing a web application and i am really confused on what should i use.
> should i use just python and use the cgi module availabe.
> Or should i use application like WebWare.Also there is PSP available.
> I am really confused and need help

It depends of the kind of application you want to do exactly, there are
many possibilities from cgi to zope...

Look into the archive of the list, you'll find a lot of answer to this
question. Or describe more what you need.

bye

-- 
Wilk - http://flibuste.net


From mark at mceahern.com  Sun Jan  4 20:40:23 2004
From: mark at mceahern.com (Mark McEahern)
Date: Sun, 04 Jan 2004 19:40:23 -0600
Subject: Why does this fail?
In-Reply-To: <vvhdlm72386b3c@corp.supernews.com>
References: <vvhdlm72386b3c@corp.supernews.com>
Message-ID: <1073266823.12941.24.camel@dev.internal>

On Sun, 2004-01-04 at 18:58, Dave Murray wrote:
> New to Python question, why does this fail?

[...]
>     try:
[...]
>     except:
[...]

Because you're treating all errors as if they're what you expect.  You
should be more specific in your except clause.  Do this and you'll see
what I mean:

  try:
    whatever
  except:
    raise # raise whatever exception occurred
    return 0

In other words, you should be explicit about the errors you silence.

Also, it's not clear what Checkit() is actually supposed to do.  Is it
supposed to verify the URL actually exists?  urllib doesn't raise an
error for 404 not found--urllib2 does.  Try that instead.

Cheers,

// m




From aahz at pythoncraft.com  Mon Jan 19 10:26:01 2004
From: aahz at pythoncraft.com (Aahz)
Date: 19 Jan 2004 10:26:01 -0500
Subject: Optimized quoting (was Re: Speed?)
References: <5.2.0.9.0.20040102221218.00b7c870@mail.zomething.com>
	<m3brpi72rb.fsf@pc150.maths.bris.ac.uk>
	<btcfc1$49e$1@panix3.panix.com> <btqlm8$s6d$1@wheel2.two14.net>
Message-ID: <bugsu9$8vi$1@panix1.panix.com>

In article <btqlm8$s6d$1 at wheel2.two14.net>,
Martin Maney  <maney at pobox.com> wrote:
>Aahz <aahz at pythoncraft.com> wrote:
>> In article <m3brpi72rb.fsf at pc150.maths.bris.ac.uk>,
>> Michael Hudson  <mwh at python.net> wrote:
>>>aahz at pythoncraft.com (Aahz) writes:
>>>>
>>>> "Premature optimization is the root of all evil in programming."
>>>> --C.A.R. Hoare (often misattributed to Knuth, who was himself quoting Hoare)
>>>
>>>Cite?
>
>> http://www.haskell.org/pipermail/haskell-cafe/2001-January/001461.html
>> Anybody have a copy of _Literate Programming_ to check?
>
>Surely someone else must have checked this before now.  Perhaps the
>reply went astray, or isn't threaded properly so that I don't see it.
>Anyway.  Yes, Knuth says, in a parenthetical aside on page 276, "But I
>also knew, and forgot, Hoare's dictum that premature optimization is
>the root of all evil in programming."
>
>Which fails to answer the quite reasonable wish for a cite attributing
>the phrase, rather than the concept, to Hoare.  (a distinction Cally
>likes to troll in her .sig, as you know.)

Well, I tried sending e-mail to Hoare; he hasn't responded.  Knuth
doesn't do e-mail, and I'm not sure whether I should bother sending him
snail mail.  If anyone else feels like doing it (and I suppose he's more
likely to respond if multiple people do), here's his address:

    Prof. Donald E. Knuth
    Computer Science Department
    Gates Building 4B
    Stanford University
    Stanford, CA 94305-9045 USA
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

A: No.
Q: Is top-posting okay?


From robhboyd at yahoo.com  Thu Jan 22 11:15:07 2004
From: robhboyd at yahoo.com (Robert Boyd)
Date: Thu, 22 Jan 2004 08:15:07 -0800 (PST)
Subject: PyCon2004 - Where to stay, which airport?
In-Reply-To: <buoo60$54m$1@sea.gmane.org>
Message-ID: <20040122161507.88909.qmail@web14102.mail.yahoo.com>


--- Brad Clements <bkc at Murkworks.com> wrote:

> Cheap flights from Ottawa (2 hour drive), $278 or so
> to DCA. (but from
> Massena, 30 minute drive) $1200 to DCA. Thanks FAA
> Essential Air Service.
> 
> Anyway, where should I stay that's cheap but not too
> yucky? I don't mind
> riding the subway. I might come early for sprints or
> the Smithsonian.
> 
> I couldn't find recommended lodgings on the PyCon
> wiki. Is DCA the correct
> airport?
> 

Check the prices to BWI (Baltimore-Washington
International) and IAD (Dulles). BWI often is the
cheapest of the 3 DC metro area airports. I'm pretty
certain BWI has a shuttle to downtown DC, I know
Dulles has cheap shuttle to DC or to nearby Metrorail
(subway). Washington Flyer shuttle to Metro:
www.washfly.com. SuperShuttle van transport:
www.supershuttle.com. "Raygun" National Airport is
right on a subway line.

As for hotels, how cheap is cheap? Arlington Virginia
is probably cheaper than downtown DC, and there's
subway.

Rob

__________________________________
Do you Yahoo!?
Yahoo! SiteBuilder - Free web site building tool. Try it!
http://webhosting.yahoo.com/ps/sb/



From altis at semi-retired.com  Thu Jan 29 16:11:42 2004
From: altis at semi-retired.com (Kevin Altis)
Date: Thu, 29 Jan 2004 13:11:42 -0800
Subject: wxPython: images from URLs
References: <mailman.810.1075149139.12720.python-list@python.org>
	<fgse10l8pae12p0els55fsujllq2irrj0l@4ax.com>
	<84fc4588.0401280613.771ac07@posting.google.com>
Message-ID: <EDeSb.43$6W6.69645@news.uswest.net>

"Anand Pillai" <pythonguy at Hotpop.com> wrote in message
news:84fc4588.0401280613.771ac07 at posting.google.com...
> I have written some code for this in my PyWiew application
> which allows one to open image urls directly.
>
> Copying some relevant code from the application...
>
> self._imgstream = urllib2.urlopen(url).read()
> stream=cStringIO.StringIO(self._imgstream)
>
> try:
>    img=wxImageFromStream(stream)
> except:
>    pass
>
> In short you do the following.
>
> 1. Use urllib or urllib2 to open the image data stream
> 2. Make a cStringIO string buffer from the data stream
> 3. Pass it to "wxImageFromStream()" method to get the
>    wxImage object.
> 4. Display the image directly or by converting to
>    a suitable format using PIL.
>
> In my experience I found that wxWindows tend to
> display an error message window when the image is displayed
> directly as a wxImage though the image data is quite ok.
> (Something like a corrupt stream dialog). So what I have
> done in the application is, use PIL to convert the wxImage
> to Windows BMP format and then display it. This seems
> to work for all images.
>
> HTH.
>
> -Anand
>
>
>
> Tim Roberts <timr at probo.com> wrote in message
news:<fgse10l8pae12p0els55fsujllq2irrj0l at 4ax.com>...
> > Jonathan Daugherty <cygnus at cprogrammer.org> wrote:
> > >
> > >Does anyone here know if the wxImage class in wxPython supports
dislaying
> > >images from URLs?
> >
> > wxImage will read from a file or from a wxWindows stream.  It won't
> > download from a web site, but that's trivially easy using something like
> > urllib.

In general you don't display a wxImage object directly. In wxWindows,
wxImage is the platform-independent image class and wxBitmap is the
platform-specific image class. So, when you set an image to be used with a
wxStaticBitmap or wxBitmapButton or draw to a wxDC you use a wxBitmap.
Certain image operations not yet supported by wxWindows are easier to handle
with PIL in which case your solution of keeping a working image in PIL
format and then converting a wxBitmap prior to display is also a good
solution. Conversion is covered in the wxPython wiki.

http://wiki.wxpython.org/

Here are some of the conversion routines PythonCard uses to deal with PIL,
wxImage, wxBitmap, and NumPy numeric arrays.

def PILToImage(pilImage):
    if (pilImage.mode != 'RGB'):
        pilImage = pilImage.convert('RGB')
    imageData = pilImage.tostring('raw', 'RGB')
    img = wx.wxEmptyImage(pilImage.size[0], pilImage.size[1])
    img.SetData(imageData)
    return img

def PILToBitmap(image):
    return wx.wxBitmapFromImage(PILToImage(image))

def BitmapToPIL(bmp):
    imageData = wx.wxImageFromBitmap(bmp).GetData()
    imagePIL = fromstring('RGB', (bmp.GetWidth(), bmp.GetHeight()),
imageData)
    imagePIL = imagePIL.convert('RGB')
    return imagePIL

def numericArrayToImage(array):
    height, width = array.shape[:2]
    img = wx.wxEmptyImage(width, height)
    img.SetData(array.tostring())
    return img

ka




From peterwu at hotmail.com  Thu Jan 22 11:17:56 2004
From: peterwu at hotmail.com (Peter Wu)
Date: Thu, 22 Jan 2004 11:17:56 -0500
Subject: Program Python in VIM
Message-ID: <871xpsc5zf.fsf@tulip.whu.ca>

I'm giving vim a try to program Python. The following are the steps I
follow to code/test a python program.

vi test.py
[key in some python code]
:wq
:!python test.py


Is there any other way? I don't want to type 'python test.py' every time
I've made any modifications. In Emacs, I can simply fire C-c C-c to fire
the python interpreter. Thanks!

-- 
       ,,,
      (o o)       Peter Wu
---ooO-(_)-Ooo--- Powered by GNU/Linux 2.4.22


From heavens7s at hotmail.com  Wed Jan 28 13:16:41 2004
From: heavens7s at hotmail.com (Joe)
Date: 28 Jan 2004 10:16:41 -0800
Subject: directory/file copy over ftp
Message-ID: <560d84ab.0401281016.30706c7d@posting.google.com>

This is my first time working with the ftplib from Python.  I am
trying to copy files from the directory.  Do you know how?


From NAIGIMSESRIMAIL at gims.com  Fri Jan 30 10:37:17 2004
From: NAIGIMSESRIMAIL at gims.com (GroupShield for Exchange (ESRIMAIL))
Date: Fri, 30 Jan 2004 17:37:17 +0200
Subject: ALERT -  GroupShield ticket number OB70_1075477035_ESRIMAIL_3 was
	generated
Message-ID: <B06B8FEF47ACD7119E720040F428459101FAF714@ESRIMAIL>

Action Taken:
The message was blocked because of its subject.

To:
python-list at python.org <python-list at python.org>

From:
latex-bugs at latex-project.org <latex-bugs at latex-project.org>

Sent:
-265200128,29615942

Subject:
Re: hello

Attachment Details:-

Attachment Name: N/A
File: Infected.msg
Infected? No
Repaired? No
Blocked? Yes
Deleted? No
Virus Name: 



	
-------------- next part --------------
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From stephan.diehlNOSPAM at gmx.net  Tue Jan 20 11:58:29 2004
From: stephan.diehlNOSPAM at gmx.net (Stephan Diehl)
Date: Tue, 20 Jan 2004 17:58:29 +0100
Subject: personal document mgmt system idea
References: <b03e80d.0401200538.10fcf33a@posting.google.com>
Message-ID: <bujmjn$rkn$05$1@news.t-online.com>

Sandy Norton wrote:

Hi Sandy,

looks like this will be the year of personal document management projects.
Since I'm involved in a similar project (hope I can go Open Source with it),
here are some of my thoughts.

> Hi folks,
> 
> I have been mulling over an idea for a very simple python-based
> personal document management system. The source of this possible
> solution is the following typical problem:
>
 
[...]

> 
> The first problem I've run into is that mysql or the MySQL
> connector crashes when the size of one BLOB reaches a certain point:
> in this case an .avi file of 7.2 mb .
> 

Just dump your files somewhere in the filesystem and keep a record of it in
your database.

In addition, a real (text) search engine might be of help. I'm using swish-e
(www.swish-e.org) and are very pleased with it.

Maybe, before you invest to much time into such a project, you should check
out the following:

Chandler (http://www.osafoundation.org)
        if it's finished, it will do excactly what you are aiming for (and it's
        written in Python)

ReiseFS (see www.namesys.com -> Future Vision)

Gnome Storage (http://www.gnome.org/~seth/storage)

WinFS
(http://msdn.microsoft.com/Longhorn/understanding/pillars/WinFS/default.aspx)

Hope that helps

Stephan

        



From bkelley at wi.mit.edu  Fri Jan 16 11:51:18 2004
From: bkelley at wi.mit.edu (Brian Kelley)
Date: Fri, 16 Jan 2004 11:51:18 -0500
Subject: MySQLDB multiple cursor question
In-Reply-To: <4so1d1-a13.ln1@beastie.ix.netcom.com>
References: <3ffc6160$0$572$b45e6eb0@senator-bedfellow.mit.edu>
	<3ffd7dbe$0$560$b45e6eb0@senator-bedfellow.mit.edu>
	<b840abf4.0401081132.6c57c82f@posting.google.com>
	<eBmLb.1180$Rc4.4737@attbi_s54>
	<4so1d1-a13.ln1@beastie.ix.netcom.com>
Message-ID: <40081686.9020006@wi.mit.edu>

Dennis Lee Bieber wrote:

> Brian Kelley fed this fish to the penguins on Thursday 08 January 2004 
> 16:28 pm:
> 
> 
>>There you have it.  MySQLdb has a threadsafety level of 1 which means
>>that connections can't be shared but the module can.
>>
> 
>         I'd run into a reference to that attribute in the Nutshell, but the 
> section on DB-API only mentioned that 0 meant not-thread-safe; no 
> explanation of what different positive values might mean (and I didn't 
> have time this morning to try to find it via google).

If you google for PEP 249 you'll find the description.

Brian



From sa at sfsu.edu  Fri Jan 16 12:53:47 2004
From: sa at sfsu.edu (Sean Abrahams)
Date: Fri, 16 Jan 2004 09:53:47 -0800
Subject: Web Form Error Handling Techniques
Message-ID: <EF4981BC-484C-11D8-8401-000A95C48278@sfsu.edu>

The following is a reprint of a message I sent to the tutor list a long 
time ago, that I haven't gotten around to discussing with anyone else 
and failed to hear a reply on the tutor list. Hoping someone here may 
want to have some dialog.

--

I'm learning to write unit tests and am trying to write them for a web
application I'm working on.

I'm currently writing a test that is to purposefully fail by passing
invalid data to a function. However this brought me to thinking about
how to handle errors.

Let me set up a hypothetical scenario.

I have a web form with name and age as its two fields. When a person
enters his/her information and submits the form, I take the two fields
and create a dict that contains {'name' : 'Foo', 'age' : '82'}.

I pass this information to a function called, insertData which
looks something like this:

def insertData(data):

     # test data for validity
     if not data['name'].isalpha():
        raise InvalidDataError(data['name'], "Name contains non-alpha
        characters")
     if not data['age'].isdigit():
        raise InvalidDataError(data['age'], "Age contains non-digit
        characters")

     sql = """
     INSERT INTO people (name, age) VALUES ('%s', '%s')
     """ % (data['name'], data['age'])

     executeSQL(sql)

I should first check to see if the data is valid, meaning that the
name contains only alpha characters and the age only containing
numeric characters.

If I raise an exception, how would one handle the reprinting of the
web form with a red * next to the field that contains invalid data? If
one field is in error, I can see that upon receiving an exception you
can have your code just reprint the web form with the red star, but
what about when both fields are in error, do you have the exception
create a list which then your code checks to see if it exists and then
loops through it to know what fields are in error?

And then again, perhaps I'm completely wrong and am going about this
in an amateur manner.

I realize this is more of a style question, but that's what I'm
interested in discussing.

Thanks,
--Sean




From aahz at pythoncraft.com  Sat Jan  3 19:05:13 2004
From: aahz at pythoncraft.com (Aahz)
Date: 3 Jan 2004 19:05:13 -0500
Subject: Creating a capabilities-based restricted execution system
References: <LmmdnUn4seDeGWuiXTWc-w@speakeasy.net>
	<vvdfljlg0gce9c@news.supernews.com>
	<9Jecnc6TZdy4lGqiXTWc-w@speakeasy.net>
	<vveg0bb6is2f60@news.supernews.com>
Message-ID: <bt7lbp$ovg$1@panix2.panix.com>

In article <vveg0bb6is2f60 at news.supernews.com>,
John Roth <newsgroups at jhrothjr.com> wrote:
>"Sean R. Lynch" <seanl at chaosring.org> wrote in message
>news:9Jecnc6TZdy4lGqiXTWc-w at speakeasy.net...
>> John Roth wrote:
>>>
>>> Yes, you're missing something really obvious. Multi-level security
>>> is a real difficult problem if you want to solve it in a believable
>>> (that is, bullet-proof) fashion. The only way I know of solving it
>>> is to provide separate execution environments for the different
>>> privilege domains.  In the current Python structure, that means
>>> different interpreters so that the object structures don't intermix.
>>
>> Hmmm, can you give me an example of a Python application that works
>> this way? Zope seems to be doing fine using RestrictedPython.
>> RestrictedPython is, in fact, an attempt to provide different
>> execution environments within the same memory space, which is the
>> whole point of my exercise. Now, I know that the lack of an example
>> of insecurity is not proof of security, but can you think of a way to
>> escape from RestrictedPython's environment? DoS is still possible,
>> but as I'm not planning on using this for completely untrusted users,
>> I'm not too concerned about that.
>
>Restricted Python was withdrawn because of a number of holes, of which
>new style classes were the last straw.

RestrictedPython was *not* withdrawn; rexec was withdrawn.  This is a
difficult enough issue to discuss without confusing different modules.  See 
http://dev.zope.org/Wikis/DevSite/Projects/SupportPython21/RestrictedPython
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

Weinberg's Second Law: If builders built buildings the way programmers wrote 
programs, then the first woodpecker that came along would destroy civilization.


From simonb at NOTTHISBIT.webone.com.au  Tue Jan 20 18:25:24 2004
From: simonb at NOTTHISBIT.webone.com.au (Simon Burton)
Date: Wed, 21 Jan 2004 10:25:24 +1100
Subject: Pyrex and numarray
References: <buh7to$ldk$1@graf.cs.uni-magdeburg.de>
	<pan.2004.01.20.00.09.15.463837@NOTTHISBIT.webone.com.au>
	<buj83b$sop$1@graf.cs.uni-magdeburg.de>
Message-ID: <pan.2004.01.20.23.25.18.203349@NOTTHISBIT.webone.com.au>

On Tue, 20 Jan 2004 13:48:42 +0100, Marco Bubke wrote:

> thx
> 
> but I need to extract the array to a float*.
> 
> I do NA_OFFSETDATA(NA_InputArray(odata, tFloat64, C_ARRAY)) but this isn't
> working because Pyrex says he can't storage it. There is a unknown size. I
> only need the pointer tp a C array of floats. Thats all.
> 
> ragards
> 
> Marco

Use a variable?

cdef float* data
array = NA_InputArray( array, natype, C_ARRAY )
data = <float *>NA_OFFSETDATA(array)

Simon.



From stefnin.nospam at yahoo.fr  Wed Jan  7 07:44:19 2004
From: stefnin.nospam at yahoo.fr (Stéphane Ninin)
Date: 07 Jan 2004 12:44:19 GMT
Subject: Why ' '.some_string is often used ?
Message-ID: <Xns94698C0955DE0stefninnospamyahoofr@213.228.0.4>


  Hi all,

This is not the first time I see this way of coding in Python and 
I wonder why this is coded this way:

Howto on PyXML
(http://pyxml.sourceforge.net/topics/howto/node14.html) 
shows it on this function, but I saw that in many other pieces of code:

def normalize_whitespace(text):
    "Remove redundant whitespace from a string"
    return ' '.join(text.split())

Is there a reason to do instead of just returning join(text.split()) ?
what does this mean ?

Thanks in advance for your explanations.
 
  Regards,

-- 
Stephane Ninin


From max at alcyone.com  Thu Jan 29 21:05:18 2004
From: max at alcyone.com (Erik Max Francis)
Date: Thu, 29 Jan 2004 18:05:18 -0800
Subject: comparing booleans
References: <mailman.951.1075324969.12720.python-list@python.org>
	<40185112.264898A4@alcyone.com>
	<eaa90cc908c7a217f0d6475e41c7622d@news.teranews.com>
Message-ID: <4019BBDE.D4429EDF@alcyone.com>

Dang Griffith wrote:

> Not that I've never used this (cool) Python syntax in practice,
> but I thought it was worth mentioning that using != and ^ in
> boolean expressions does not always give the same result.  It does
> give the same result when there are only two operands.

This is because of operator chaining, which only exists a special case
for the relational operators (==, !=, <, <=, >, >=).  It's not actually
a difference in the truth table; it's because chaining operators behave
differently than other operators.

-- 
 __ Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
/  \ San Jose, CA, USA && 37 20 N 121 53 W && &tSftDotIotE
\__/ The work will teach you how to do it.
    -- (an Estonian proverb)


From lutz_p at gmx.net  Thu Jan 22 10:42:12 2004
From: lutz_p at gmx.net (Lutz Paelike)
Date: Thu, 22 Jan 2004 16:42:12 +0100
Subject: Looking for advice: supporting multiple embedded interpreters
Message-ID: <400FEF54.4040902@gmx.net>

Paul is totally right. I am in the same situation here.
He described very clearly the problem.

Any insights anybody?

Lutz Paelike


Paul Miller wrote:
> Some background first - we have some software that embeds a Python 
> interpreter into a host application. Scripts are loaded dynamically and 
> used. But we want to support the ability to edit scripts while the app 
> is running. This means we have to "unload" the script and cause a 
> reload. Normal module reloading tricks don't work because if you try to 
> reimport a script that imports another script, and if the nested script 
> is changed, it might not be reloaded itself. Also, we have 2 parts of 
> the software, each using Python for its own set of scripts. We don't 
> want scripts loaded into each parts to "see" scripts loaded into the 
> other part. Ideally, we would like multiple "instances" of a Python 
> interpreter to manage this.
> 
> So, for Python 2.2, I came up with a system that works. When we need a 
> new self-contained Python interpreter, I use Py_NewInterpreter(), swap 
> it in using PyThreadState_Swap, load my built in modules, and swap it 
> back out. When I need to run some code in that interpreter, I swap it 
> back in, load the module I need, call methods in it, and swap it back 
> out. When I'm done with the interpreter, I swap it back in and call 
> Py_EndInterpreter.
> 
> When I want to force a reload of all the script code in a given 
> interpreter, I just delete the interpreter, create a new one, and load 
> the scripts into that one. This has worked flawlessly. And each "part" 
> of my application can use a different interpreter without modules and 
> globals in each one interfering with the other.
> 
> Now, with Python 2.3, this code doesn't seem to work anymore. Someone 
> told me it is likely because of the extensive rewrite of GUSI or 
> whatnot. It is important to note that I'm NOT really doing any 
> threading. I just was self-contained interpreters for the above reasons.
> 
> What I am wondering is if there a reliable method in 2.3 that does what 
> I need?
> 
> It has recently come to my attention that Lutz Paelike is in exactly the 
> same situation I am in, so I don't think this is a fringe concept.
> 
> ------



From miki.tebeka at zoran.com  Thu Jan  8 04:57:29 2004
From: miki.tebeka at zoran.com (Miki Tebeka)
Date: 8 Jan 2004 01:57:29 -0800
Subject: Bits from Numbers.
References: <3ffcb189$1@nntp0.pdx.net>
Message-ID: <4f0a9fdb.0401080157.6686499e@posting.google.com>

Hello Scott,

> I am whacking away at some code to view numbers as bit sequences.
> While this is not complete, I'd appreciate some feedback from anyone
> who is interested in looking at it:
>      http://members.dsl-only.net/~daniels/bits.html
Looks great. 

Several things:
1. I think a new object "bitarray" which will be a subclass of "list" will be 
   more "natural". Then you'll get:
   bitcount(n) -> n.count(1)
   bit(n, x) -> n[x]
   extract(x, lo, hi) -> n[lo:high]
   ...
2. There is no function to set a range of bits n = setbits(n, start, end, value)
3. I'd prototype it first in Python and after the interface has matured move it 
   to C. This way you'll be able to make changes faster. (This is the way the 
   Python library works - see sets, itertools, heapq ...)

HTH.
Miki.


From fumanchu at amor.org  Sun Jan 18 21:46:13 2004
From: fumanchu at amor.org (Robert Brewer)
Date: Sun, 18 Jan 2004 18:46:13 -0800
Subject: Determining a replacement dictionary from scratch
Message-ID: <DE1CF2B4FEC4A342BF62B6B2B334601E561C39@opus.amorhq.net>

Dan wrote:
> I'd like to be able to take a formatted string and determine the
> replacement dictionary necessary to do string interpolation with it. 
> For example:
> 
> >>> str = 'his name was %(name)s and i saw him %(years)s ago.'
> >>> createdict( str )
> {'name':'', 'years':''}
> >>>
> 
> Notice how it would automatically fill in default values based on
> type.  I figure since python does this automatically maybe there is a
> clever way to solve the problem.  Otherwise I will just have to parse
> the string myself.  Any clever solutions to this?

If the only functionality you want is the ability to fill in default
values, you could try a variation on subclassing dict:

PythonWin 2.3.2 (#49, Oct  2 2003, 20:02:00) [MSC v.1200 32 bit (Intel)]
on win32.
>>> class DefaultDict(dict):
... 	def __init__(self, default):
... 		self.default = default
... 	def __getitem__(self, key):
... 		try:
... 			return dict.__getitem__(self, key)
... 		except KeyError:
... 			return self.default
... 		
>>> str = 'his name was %(name)s and i saw him %(years)s ago.'
>>> d = DefaultDict('???')
>>> d['years'] = 3
>>> str % d
'his name was ??? and i saw him 3 ago.'


Robert Brewer
MIS
Amor Ministries
fumanchu at amor.org



From graham at rockcons.co.uk  Sun Jan  4 16:25:33 2004
From: graham at rockcons.co.uk (Graham Nicholls)
Date: Sun, 04 Jan 2004 21:25:33 +0000
Subject: Launching pdb from within a script
References: <UNYJb.14065$Od5.5161@news-binary.blueyonder.co.uk>
	<bt9mhl$9k2$06$1@news.t-online.com>
	<MHZJb.14962$Od5.2841@news-binary.blueyonder.co.uk>
	<bOZJb.15107$Od5.11731@news-binary.blueyonder.co.uk>
	<bt9t94$q60$07$1@news.t-online.com>
Message-ID: <hx%Jb.16449$Od5.8687@news-binary.blueyonder.co.uk>

Peter Otten wrote:

> Graham Nicholls wrote:
> 
>> I'm sure I was able to print the value of variables like this:
>> 
>>  except :
>>         pdb.set_trace()
> [...]
>> But pdb complains that there are no such variables.  It may be that I had
>> to add some incantation around the script startup - I just can't remember
>> (and its frustrating!).
> 
> <debugger.py>
> import pdb
> abc = 1
> try:
>     print "before"
>     1/0
> except:
>     pdb.set_trace()
> print "after"
> </debugger.py>
> 
> Now run it:
> 
> before
> --Return--
>> /(suppressed)/python2.3/pdb.py(992)set_trace()->None
> -> Pdb().set_trace()
> (Pdb) abc
> *** NameError: name 'abc' is not defined
> (Pdb) u
>> /(suppressed)/debugger.py(7)?()
> -> pdb.set_trace()
> (Pdb) abc
> 1
> (Pdb)
> 
> If the above sample session doesn't help, you could actually read the pdb
I have had a look, but its rather a case of you don't know what you don't
know, IYSWIM.
> documentation - or do something new and dangerous: search google groups
> for, say, Nicholls and set_trace :-)

What a good idea!
Thanks again

PS 1 minute later and I've found the relevant posting, which indeed mentions
using set_trace().

I have in ordinary google searches of course returned ng postings, but had
never used their group searches, so thnkas on two counts.
> 
> Peter

Regards
Graham
-- 
#include <wit>


From Scott.Daniels at Acm.Org  Wed Jan 14 10:57:55 2004
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Wed, 14 Jan 2004 07:57:55 -0800
Subject: Safe prime numbers in Python
In-Reply-To: <mailman.349.1074082578.12720.python-list@python.org>
References: <200401140639.i0E6dxt09128@mail001.syd.optusnet.com.au>
	<mailman.349.1074082578.12720.python-list@python.org>
Message-ID: <4005725d$1@nntp0.pdx.net>

Skip Montanaro wrote:
>     Tim> Does any know of or have Python code (or C or Fortran code wrapped
>     Tim> as a Python module) for efficiently finding safe prime numbers -
>     Tim> that is a number p such that p and (p-1)/2 are both prime?
> 
> Here's what I came up with using gmpy:
> 
>     import gmpy
> 
>     def safe_primes(last=1):
>         while True:
>             next = gmpy.next_prime(last)
>             if gmpy.is_prime((next-1)/2):
>                 yield next
>             last = next
 >
I suspect it might be faster if you looked for the lower prime:

     def safe_primes(last=1):
         while True:
             last = gmpy.next_prime(last)
             other = last * 2 + 1
             if gmpy.is_prime(other):
                 yield other

-Scott David Daniels
Scott.Daniels at Acm.Org


From jepler at unpythonic.net  Sun Jan 18 15:27:10 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Sun, 18 Jan 2004 14:27:10 -0600
Subject: Determining a replacement dictionary from scratch
In-Reply-To: <slrnc0loe1.u28.ramen@lackingtalent.com>
References: <4b805376.0401181116.3b0adb41@posting.google.com>
	<slrnc0loe1.u28.ramen@lackingtalent.com>
Message-ID: <20040118202710.GA20915@unpythonic.net>

On Sun, Jan 18, 2004 at 07:34:07PM -0000, Dave Benjamin wrote:
> Here's a solution that uses a regular expression. It only handles strings
> and doesn't cache the regular expression; I'll leave this up to you. =)

Of course, since it uses regular expressions it's also wrong...

>>> createdict("%%(foo)s")
{'foo': ''}

This version might be more correct:

pat = re.compile("%\([^)]*\)s|%%")

def createdict(fmt):
	keys = [x[2:-2] for x in pat.findall(fmt) if x != '%%']
	return dict(zip(keys, [''] * len(keys)))

Here's another way, one I like better:
	class D:
		def __init__(self): self.l = []
		def __getitem__(self, item): self.l.append(item)

	def createdict(fmt):
		d = D()
		fmt % d
		return dict(zip(d.l, [''] * len(d.l)))
.. I like it better because it uses the exact same logic to determine
the needed names as it will when the string is actually formatted.

Jeff



From paul at fxtech.com  Tue Jan 27 11:14:22 2004
From: paul at fxtech.com (paul at fxtech.com)
Date: Tue, 27 Jan 2004 11:14:22 -0500 (EST)
Subject: print format for binary representation
In-Reply-To: <20040127151009.GA16950@intarweb.us>
References: <6f03c4a5.0401270700.713a73aa@posting.google.com>
	<20040127151009.GA16950@intarweb.us>
Message-ID: <7990.195.173.15.12.1075220062.squirrel@webmail.pair.com>

>   Here's a version to toy with:
>
>   binary = lambda i, c = (lambda i, c: i and (c(i >> 1, c) + str(i & 1))
> or ''): c(i, c)

Is this example in perl or python?

My brain hurts!

:-)






From seanl at chaosring.org  Sat Jan  3 13:25:40 2004
From: seanl at chaosring.org (Sean R. Lynch)
Date: Sat, 03 Jan 2004 10:25:40 -0800
Subject: Creating a capabilities-based restricted execution system
In-Reply-To: <vvdfljlg0gce9c@news.supernews.com>
References: <LmmdnUn4seDeGWuiXTWc-w@speakeasy.net>
	<vvdfljlg0gce9c@news.supernews.com>
Message-ID: <9Jecnc6TZdy4lGqiXTWc-w@speakeasy.net>

John Roth wrote:

> Yes,  you're missing something really obvious. Multi-level
> security is a real difficult problem if you want to solve it
> in a believable (that is, bullet-proof) fashion. The only way
> I know of solving it is to provide separate execution
> environments for the different privilege domains.
> In the current Python structure, that means different
> interpreters so that the object structures don't intermix.

Hmmm, can you give me an example of a Python application that works this 
way? Zope seems to be doing fine using RestrictedPython. 
RestrictedPython is, in fact, an attempt to provide different execution 
environments within the same memory space, which is the whole point of 
my exercise. Now, I know that the lack of an example of insecurity is 
not proof of security, but can you think of a way to escape from 
RestrictedPython's environment? DoS is still possible, but as I'm not 
planning on using this for completely untrusted users, I'm not too 
concerned about that.


From andrew-pythonlist at puzzling.org  Wed Jan 28 01:21:35 2004
From: andrew-pythonlist at puzzling.org (Andrew Bennetts)
Date: Wed, 28 Jan 2004 17:21:35 +1100
Subject: Tcl style traces
In-Reply-To: <40171be5$0$1742$5a62ac22@freenews.iinet.net.au>
References: <40171be5$0$1742$5a62ac22@freenews.iinet.net.au>
Message-ID: <20040128062135.GA22097@frobozz>

On Wed, Jan 28, 2004 at 10:18:59AM +0800, Derek Fountain wrote:
> Does Python have something similar to Tcl style tracing? That is, the
> ability to call a subroutine when a variable is written to or read from?

Not for variables in general, unless you feel like mucking about with
sys.settrace.

For attributes of objects, you can use __getattr__/__setattr__ methods, use
__getattribute__/__setattribute__ methods, use properties, or even
roll-your-own descriptor, depending on what you need.

What do you need this for?  If you can be more specific, we might be able to
help you a little better.

-Andrew.




From python at g2swaroop.net  Mon Jan 19 09:39:21 2004
From: python at g2swaroop.net (python at g2swaroop.net)
Date: Mon, 19 Jan 2004 09:39:21 -0500 (EST)
Subject: Looking for very simple general purpose tokenizer
Message-ID: <.202.71.153.169.1074523161.squirrel@www.g2swaroop.net>

Hi,
    Maybe the Spark module can help you.
Here's a DeveloperWorks tutorial on that :

http://www-106.ibm.com/developerworks/linux/library/l-spark.html

Hope it helps,
Swaroop

---------------------------------------------------------------------------
Hi group,

I need to parse various text files in python. I was wondering if there was a
general purpose tokenizer available. I know about split(), but this
(otherwise very handy method does not allow me to specify a list of
splitting characters, only one at the time and it removes my splitting
operators (OK for spaces and \n's but not for =, / etc. Furthermore I tried
tokenize but this specifically for Python and is way too heavy for me. I am
looking for something like this:


splitchars = [' ', '\n', '=', '/', ....]
tokenlist = tokenize(rawfile, splitchars)

Is there something like this available inside Python or did anyone already
make this? Thank you in advance

Maarten
-- 
===================================================================
Maarten van Reeuwijk                        Heat and Fluid Sciences
Phd student                             dept. of Multiscale Physics
www.ws.tn.tudelft.nl                 Delft University of Technology




From danb_83 at yahoo.com  Wed Jan 28 01:56:15 2004
From: danb_83 at yahoo.com (Dan Bishop)
Date: 27 Jan 2004 22:56:15 -0800
Subject: Best way to compare a list?
References: <7b454334.0401271739.59267018@posting.google.com>
Message-ID: <ad052e5c.0401272256.68c51ac6@posting.google.com>

faizan at jaredweb.com (Fazer) wrote in message news:<7b454334.0401271739.59267018 at posting.google.com>...
> Hello,
> 
> I was wondering which would be the best way to compare a list?

To compare a list to _what_?


From sambo at void.com  Thu Jan 22 19:39:20 2004
From: sambo at void.com (sambo)
Date: Thu, 22 Jan 2004 16:39:20 -0800
Subject: Best way to do this?
References: <100jg9er3qak890@corp.supernews.com>
	<ww9CAls/KHqM089yn@the-wire.com>
Message-ID: <40106D38.3010302@void.com>



>
>The "obscure" for/else can help:
>
>
>def get_password (prompt):
>    for i in (1, 2, 3):
>        password = raw_input (prompt)
>        if password == 'mypass':
>            return True
>        else:
>            print "Try Again"
>    else:
>        print "Too Bad"
>        return False
>
>
>
>        Regards.        Mel.
>
Obscure? at least it does something.

What is the advantage of the following assignment ( a few messages up)

attempts, password = 3, 'mypass'

Reading difficulty - at least 3 (no relation, hehe)

Ciao





From HAALrvanderhWEG at xs4all.nl  Thu Jan 22 12:56:27 2004
From: HAALrvanderhWEG at xs4all.nl (Rik van der Helm)
Date: Thu, 22 Jan 2004 18:56:27 +0100
Subject: newbie,cgi,os.system,cdrecord
References: <400fe08c$0$326$e4fe514c@news.xs4all.nl>
	<20040122085927.026A.JCARLSON@uci.edu>
Message-ID: <40100ea3$0$316$e4fe514c@news.xs4all.nl>

Josiah Carlson wrote:

> 
> On Thu, 22 Jan 2004 15:39:47 +0100
> Rik van der Helm <HAALrvanderhWEG at xs4all.nl> wrote:
> 
>> Hello,
>> 
>> I am trying to make a backupscript in python, which I want to manage via
>> a webform (cgi). In my script I use os.system to execute the following
>> shellscript:
>> "cdrecord -s -dev=0,1,0 -blank=fast -speed=2 fs=8m file.tgz"
>> 
>> When I execute the pythonscript in the shell, it gets executed well and I
>> get some output from cdrecord. Which I don't understand because I put
>> cdrecord at silent (-s !) I thought.
>> 
>> When I execute the pythonscript in a webbrowser via cgi, cdrecord also
>> gets executed well but I get an 'Internal Server Error' of Python and in
>> '/var/log/httpd/error_log' it says:
>> "malformed header from script. Bad header=Cdrecord 1.11a19 etc....."
>> 
>> I think I understand what is going wrong. Apache tries to print the
>> output of cdrecord and finds something wrong and stops executing the
>> script. Is this correct ? If this is correct how do I get cdrecord stop
>> making output texts ?
>> 
>> All suggestions are welcome
>> 
>> Thanks, Rik
>> 
> 
> Try:
> "cdrecord -s -dev=0,1,0 -blank=fast -speed=2 fs=8m file.tgz > /dev/null"

Thanks very much, Josiah


From martin at v.loewis.de  Fri Jan 16 02:44:31 2004
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Fri, 16 Jan 2004 08:44:31 +0100
Subject: Suggested generator to add to threading module.
In-Reply-To: <7934d084.0401152058.164a240c@posting.google.com>
References: <7934d084.0401152058.164a240c@posting.google.com>
Message-ID: <4007965F.6030106@v.loewis.de>

Andrae Muys wrote:
> I considered suggesting it for itertools, but really it's thread
> specific so I am suggesting it for the threading module.

If you are willing to contribute this function, please submit
a patch to sf.net/projects/python, including documentation changes,
and test cases.

Regards,
Martin



From netquest at sympatico.ca  Tue Jan 27 22:46:18 2004
From: netquest at sympatico.ca (KNS)
Date: Tue, 27 Jan 2004 19:46:18 -0800
Subject: winapi: mouseclick
In-Reply-To: <JlDRb.20248$mf4.855974@news20.bellglobal.com>
References: <mailman.855.1075213039.12720.python-list@python.org>
	<JlDRb.20248$mf4.855974@news20.bellglobal.com>
Message-ID: <FzDRb.20396$mf4.859494@news20.bellglobal.com>


It's looking like I must use pyHooks...Thanks.



From andrearo at stud.ntnu.no  Sun Jan 18 16:03:34 2004
From: andrearo at stud.ntnu.no (=?ISO-8859-1?Q?Andreas_R=F8sdal?=)
Date: Sun, 18 Jan 2004 22:03:34 +0100
Subject: parse binary file in python?
Message-ID: <Pine.LNX.4.58.0401182201180.1249@leopard.stud.ntnu.no>

Hello,
I want to parse a binary file in python. Does
python have some built in methods for doing this easily?
Any links to example code would be nice..
Thanks

Andreas R.


From jcarlson at nospam.uci.edu  Sun Jan 25 20:06:35 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Sun, 25 Jan 2004 17:06:35 -0800
Subject: Mod_python on Windows Troubles
In-Reply-To: <mailman.769.1075055393.12720.python-list@python.org>
References: <mailman.769.1075055393.12720.python-list@python.org>
Message-ID: <bv1par$ctl$2@news.service.uci.edu>


> modules/mod_python.so" to httpd.conf, the Apache service refuses to
> start with the following error: "Cannot load C:/Program Files/Apache
> Group/Apache2/modules/mod_python.so into server: The specified module

While I'm not using Apache or mod_python, I would be willing to bet that 
your error is the result of using 'mod_python.so' in Windows.  Try 
'mod_python.dll' instead.

  - Josiah


From paul.moore at atosorigin.com  Mon Jan  5 17:53:47 2004
From: paul.moore at atosorigin.com (Paul Moore)
Date: Mon, 05 Jan 2004 22:53:47 +0000
Subject: PEP 324: popen5 - New POSIX process module
Message-ID: <1xqedn2c.fsf@yahoo.co.uk>

I've read the PEP, and I'd like to help with an implementation for
Windows, if no-one else is doing it. Initially, I'll probably use
win32all (or maybe ctypes) but the intention is that longer term the
necessary functions be migrated into a supporting C extension.

I do have some comments, which may be of interest.

The whole interface feels very Unix-specific. In particular,

1. The preexec_* arguments have no meaning on Windows, where the
   low-level functionality is CreateProcess (spawn) rather than
   fork/exec. This isn't too crucial, as use of the argument can
   either be ignored, or probably better, treated as an error on
   Windows.

2. The method name poll() doesn't seem appropriate in a Windows
   context (I don't know how it fits with Unix). Better might be
   is_complete() returning True/False, and use returncode to get the
   status separately.

3. The whole thing about the return code encoding both the exit status
   and the signal number is very Unix-specific. Why not split them -
   status and signal attributes, and maybe have is_complete() return 3
   possible values - +1 = completed OK, 0 = still running, -1 = died
   due to a signal.

4. wait() should be defined as "wait for the subprocess to finish, and
   then return is_complete()". That's basically what you have now,
   it's just a bit clearer if you're explicit about the intent.

5. I don't like the names fromchild, tochild, and childerr. What's
   wrong with stdin, stdout, and stderr? OK, stdin is open for write,
   and the other two for read, but that's fairly obvious as soon as
   you think about it a bit.

The biggest issue, though, is that args as a sequence of program
arguments is very Unix-specific. This is a big incompatibility between
Unix and Windows - in Windows, the low-level operation (CreateProcess)
takes a *command line* which is passed unchanged to the child process. 
The child then parses that command line for itself (often, but not
always, in the C runtime). In Unix, exec() takes an *argument list*. 
If you have a command line, you have to split it yourself, a task
which is usually delegated to /bin/sh in the absence of anything else. 
This is hard to handle portably.

I'd suggest that the Windows implementation allow two possibilities
for the "args" argument. If args is a string, it is passed intact to
CreateProcess. That is the recommended, and safe, approach. The shell
is still not invoked, so there's no security issue. If a (non-string)
sequence is passed, the Windows implementation should (for Unix
compatibility) build a command line, using its best attempt to quote
things appropriately (this can never be safe, as different programs
can implement different command line parsing). This is not safe (wrong
answers are the main problem, not security holes), but will improve
portability.

I agree with Guido's comments on python-dev - this module (popen5 is a
*horrible* name - I'd prefer "process", but am happy if someone comes
up with a better suggestion) should aim to be the clear "best of
breed" process control module for all platforms.

Some other points may well come up as I try to implement a Windows
version.

I hope this is of some use,
Paul.
-- 
This signature intentionally left blank




From edcjones at erols.com  Thu Jan 22 09:56:04 2004
From: edcjones at erols.com (Edward C. Jones)
Date: Thu, 22 Jan 2004 09:56:04 -0500
Subject: python said : "1, 2, 3, 6, 7, manbo !"
In-Reply-To: <400F3D90.2176087B@alcyone.com>
References: <pan.2004.01.21.20.53.18.750567@address.com>
	<400F3D90.2176087B@alcyone.com>
Message-ID: <400fe57a$0$3043$61fed72c@news.rcn.com>

Erik Max Francis wrote:
> - wrote:
> 
> 
>>Why 5 does not appear ? (this was the source of a deep bug in a 4000+
>>lines networked program...)
> 
> 
> You are iterating over a mutable sequence while you are mutating it. 
> That is a big no-no.

This can sometimes be done safely by iterating backwards:

n = len(seq)
for i in range(n-1, -1, -1):
     ...



From jacek.generowicz at cern.ch  Wed Jan 14 07:04:56 2004
From: jacek.generowicz at cern.ch (Jacek Generowicz)
Date: 14 Jan 2004 13:04:56 +0100
Subject: Why learn Python ??
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<pan.2004.01.12.20.18.36.606924@yahoo.com>
	<tyfoet8dx61.fsf@pcepsft001.cern.ch>
	<m3n08qwy4p.fsf@pc150.maths.bris.ac.uk>
Message-ID: <tyfptdmd9cn.fsf@pcepsft001.cern.ch>

Michael Hudson <mwh at python.net> writes:

> > Careful. If you were to make such a suggestion on comp.lang.lisp, then
> > you'd be likely to be told that learning Scheme first will cause you
> > irreversible brain damage. Of course, now that He Whose Name Must Not
> > Be Mentioned is no longer posting there, 
>
> Heeeeeeeeee's back!

Yes, kinda ironic that I happened to post this on the eve of his
return.


From james at logicalprogression.net  Wed Jan 21 15:33:34 2004
From: james at logicalprogression.net (James Henderson)
Date: Wed, 21 Jan 2004 20:33:34 +0000
Subject: python mode question
In-Reply-To: <87y8s1oxuj.fsf@tulip.whu.ca>
References: <87y8s1oxuj.fsf@tulip.whu.ca>
Message-ID: <200401212033.34507.james@logicalprogression.net>

On Wednesday 21 January 2004 8:23 pm, Peter Wu wrote:
> After firing C-c C-c to execute a python program in Python mode, an
> output buffer will be displayed at the bottom of the window. Also, the
> focus remains in the output buffer. How can I switch the focus from the
> output buffer to the editing buffer? Thanks!

C-x o

I take it you're talking about Emacs. :)
-- 
James Henderson, Logical Progression Ltd.
http://www.logicalprogression.net/
http://sourceforge.net/projects/mailmanager/




From jzgoda at gazeta.usun.pl  Wed Jan 14 15:57:47 2004
From: jzgoda at gazeta.usun.pl (Jarek Zgoda)
Date: Wed, 14 Jan 2004 20:57:47 +0000 (UTC)
Subject: id3v2 module
References: <pan.2004.01.13.09.12.39.813880@beeznest.NOSPAM.net>
	<pan.2004.01.13.20.14.20.783863@freenet.de>
	<bu1mtf$nm$1@atlantis.news.tpi.pl>
	<pan.2004.01.13.23.25.10.620142@freenet.de>
Message-ID: <bu4aga$k9$7@atlantis.news.tpi.pl>

Guido Schimmels <guido.schimmels at freenet.de> pisze:

>>>> I'd like to know if there is a third-party module for reading/writing
>>>> id3v2 informations.
>>> http://id3-py.sourceforge.net/
>> 
>> This one is able to read and write only ID3v1.1 tags.
> 
> O, sorry. Maybe this is what you are looking for then:
> http://tunetagger.sourceforge.net/snapshots/

No, I'm not looking for any ID3 library -- I just had something to do
with mp3s lately... ;)

-- 
Jarek Zgoda
Unregistered Linux User #-1
http://www.zgoda.biz/ JID:zgoda-a-chrome.pl http://zgoda.jogger.pl/


From tim.one at comcast.net  Sun Jan 11 21:01:57 2004
From: tim.one at comcast.net (Tim Peters)
Date: Sun, 11 Jan 2004 21:01:57 -0500
Subject: Databases: Which one's right for me?
In-Reply-To: <9a6d7d9d.0401111712.22a74be7@posting.google.com>
Message-ID: <LNBBLJKPBEHFEDALKOLCAEOJIEAB.tim.one@comcast.net>

[Aaron Watters]
> Some SQL isolation levels are hacks to allow long running
> transactions, etcetera.  If you keep to the strictest isolation level
> you get the classical behaviour which has been studied and elaborated
> by many very smart people over the last several decades and which is
> very well understood.
>
> Does ZODB support the strictest isolation levels?

I'm almost certain it doesn't, but I'm not a DB expert.  Please take this to
a ZODB list, as previously suggested.

> If so how?  If not what does it support exactly?

I pointed you to Jeremy's relevant blog entry last time, which discusses
these issues -- and nobody knows more about ZODB than Jeremy.  If you want
someone to read it for you and reword it, I'm sure someone on a ZODB list
will be happy to do so <wink>.




From skip at pobox.com  Wed Jan 28 09:52:55 2004
From: skip at pobox.com (Skip Montanaro)
Date: Wed, 28 Jan 2004 08:52:55 -0600
Subject: I support PEP 326
In-Reply-To: <20040128090205.GA3086@nl.linux.org>
References: <698f09f8.0401272000.79704ef0@posting.google.com>
	<mailman.654.1074788734.12720.python-list@python.org>
	<698f09f8.0401271318.21c9ca72@posting.google.com>
	<bv6ph8$181$1@news.service.uci.edu>
	<20040128041023.2EB9225B353@bonanza.off.ekorp.com>
	<20040128090205.GA3086@nl.linux.org>
Message-ID: <16407.52423.664582.438055@montanaro.dyndns.org>


    >> That's a _lot_ of stuff in one module. Even if you exclude the 40-odd
    >> exceptions that are there, that's still a lot of guff in one big flat
    >> namespace.

    Gerrit> Any plans to clean it up in Python 3.0?

Yes, there has been some discussion about this on python-dev.  It doesn't
appear a PEP's been written yet.

Skip



From jjl at pobox.com  Mon Jan 12 18:53:53 2004
From: jjl at pobox.com (John J. Lee)
Date: 12 Jan 2004 23:53:53 +0000
Subject: Why learn Python ??
References: <40029dad$0$28706$a729d347@news.telepac.pt>
Message-ID: <877jzwg1v2.fsf@pobox.com>

"Bicho Verde" <bichoverde at sapo.pt> writes:
[...]
>      I have some basic skills in programming (C, Pascal, Macromedia
> Actionscript) but don't know exactly what to do in the world of programming.

If you just want to motivate yourself for some semi-arbitrary project,
my advice is to start using some open-source software.  All software
sucks, so you'll eventually find something that pisses you off enough
to make you want to fix it or do it from scratch, properly :-)


>     And also I don't know exactly why would I learn Python rather than C#,
> C++ or Perl.

They are all very different languages.  Trawl through google groups --
comp.lang.python is a great place to look for comments on all three
(but I would say that).  Try some of Alex Martelli's posts.  I used to
default to the widely-held position that "language wars" are mostly
content-free "religious" arguments, but experience has taught me
otherwise.  There are big, important, differences in programmer
efficiency, in computer-resource efficiency, and in community support.
And, to some extent, in the ways they make you think about problems.

The issues are subtle and complicated, and understanding them requires
writing programs in a set of languages diverse enough to come
somewhere vaguely close to spanning the big space of language-design
possibilities.

I'm feeling particularly self-indulgent, so here are a bunch that seem
notable current players to me:

Python: All-round pragmatic winner, and elegant to boot.  One
 disadvantage: you'll struggle to motivate yourself to learn any other
 language once you've used it ;-)

Perl: CPAN is great; the language is merely an insane version of Python
 (yes, Perl does predate Python).

C++: No compromises on execution speed; plays well with C (and with
 Python: check out Boost Python); horrendously complicated; no garbage
 collector (unless you add one yourself, but then you'd be better off
 mixing C++ with a saner language).  Notable for "templates".

C: Needs no introduction!

Java: Solid security model; piles of code; shockingly mediocre language,
 to the extent that there would be precious few sane uses of the thing
 were it not for Jython and all those libraries (but watch out for over-
 engineering).

C#: Java for MS .NET users (to first order, anyway).  .NET has broader
 goals than Java for language interoperation, so even though Jim Hugunin
 and others have done some initial work on a .NET implementation of
 Python, dynamic languages like Python will likely never be full .NET
 citizens (thanks to the design of the .NET CLR).  If that full
 citizenship is important to you, C# has that advantage, but I'm
 reliably informed it's fairly well-described as "a Java clone"
 (implying programmer-inefficiency), so I'd be inclined to look for a
 better language with a good .NET implementation.  Lisp?  Smalltalk?
 (there was talk of an excellent .NET smalltalk implementation, but I'm
 not sure whether that was vapourware or not...)

O'Caml: Excellent execution speed without C/C++'s unpleasant bugs.
 Functional (in the technical sense), with elegant static type
 inference, but multi-paradigm: you can write procedural code too.
 Requires a different way of thinking to procedural languages for best
 use.  Nasty syntax.  O'Reilly book in English and French.

Haskell: Another functional language (like O'Caml); good for forcing you
 to think functionally; lazy evaluation.  Lots of good books.

Fortran: Still rules for some numerical analysis work.

Lisp: Powerful, elegant and well-established, but it has been argued
 (see recent threads here) that Lisp macros are not best described as a
 language feature, but rather as a harmful, Babel-inducing, tool for
 making new languages.

Scheme: Cleaned-up version of Lisp.  Beautifully simple.  Suffers from a
 splintering of the user community thanks to a multitude of subtly
 different implementations. Worth learning just to read Abelsson &
 Sussman's (sp?) freely-downloadable book "Structure and Interpretation
 of Computer Programs".

Eiffel: Design by contract.  The book to read is Meyer's "Object-
 Oriented Software Construction".  Full of interesting stuff, if you can
 stand his self-importance ;-).

Lua: Pint-sized Python.

Erlang: Concurrent programming.

Ruby: Python with a smaller user community (unless you're Japanese),
 some minor wins and losses, and a very questionable design decision or
 two thrown in (see numerous threads on this group).

Smalltalk: Never tried it, but sounds interesting, and similar to Python
 in some ways.

Oz: Prolog for the 21st century (OK, I admit I haven't a clue what it's
 like really, but I have to try it some day...).

Mathematica and Maple: Heaven, if you're into maths.

Alex Martelli has pointed out the brain-stretching value of learning
languages of a different nature (some of which aren't Turing
complete): including query languages (eg. SQL) and markup languages
(eg. XML).

Everybody here will tell you this, but I'm going to say it yet again:
don't be so foolish as to think you have to write *all* your code in a
language like C++ (or C, or Fortran, depending on the use) just
because you want the program as a whole to run fast.

And take the current myopic view of static typing (in the eyes of the
great unwashed programming public) with a bucket of salt.


> Basicaly I don't know where to start, if there is much to do or
> if it is has it seems and there is software to everything nowadays and so
> doesn't make sense to spend time in learning a programming language.
> 
>     I just have this idea that I would like to contribute to the curve of
> accelarated exponential progress (technological singularity), artificial
> intelligence and so on. From that point of view there is much to do... But

You should be able to get that lot done in a weekend, no?  <wink>

Really, if you buy the notion of a technological singularity, you've
got me well-and-truly puzzled as to how you fit that into your brain
at the same time as believing that "there is software to everything
[sic] nowadays"!


> can I stand for it and where to start?

Small?... and, of course, keep your eyes peeled for something you
think really matters.


John


From sdeibel at wingide.com  Thu Jan 15 11:02:16 2004
From: sdeibel at wingide.com (Stephan Deibel)
Date: Thu, 15 Jan 2004 11:02:16 -0500 (EST)
Subject: Best Python IDE Code Completion!
In-Reply-To: <bu613h$drgfs$1@ID-198792.news.uni-berlin.de>
Message-ID: <Pine.LNX.4.50.0401151043570.3131-100000@hedgehog>

On Thu, 15 Jan 2004, Mirko Zeibig wrote:
> Python is dynamically typed, so no editor in the world can guess the 
> type of any function parameters correctly. If you know about the true 
> nature of one, you may assist Wing IDE by using isinstance.
> 
> class Klass(object):
> 
>      def hello(self):
>         print "Hello"
> 
> def foo(bar):
>      assert isinstance(bar, Klass)
>      bar.hello()
> 
> Without the assert line, it's impossible to detect which type bar has. 
> Only during runtime the type of bar is known.

Note that you can also use the following form to cover cases where you run
into circular imports:

if 0:
  import mymod
  isinstance(bar, mymod.Klass)

The source analyser still picks up on the hint but nothing is done at
runtime.

> John said the following on 01/15/2004 12:52 PM:
> >   Wing IDE seems converse. The editor auto list members is great but
> > has no calltips. The interactive window has no completion at all.
> I second this, though the editor sometimes need a bit of help ...
> and I do not like the MDI approach they have.

We're changing that and adding calltips too... If you want announcement
of upcoming releases sign up here:

http://wingide.com/announcelist

Sorry, I can't currently reveal anything about expected release dates.

> >   Python has great introspective capabilities and we have a great open
> > contributing community. What technical difficulties keep us from
> > having REAL code completion like MS, Borland and several Java IDEs
> > (All of which have been funded at one time or the other if not
> > entirely - perhaps this is the reason?)

Wing does static analysis of code (which can't use Python's introspection)  
because it can't rely on all code being executed (all classes
instantiated, etc).  Also, during editing code often is incorrect and
won't run but we still want to update analysis information.  It's not a
trivial problem, esp. considering the need for speed, but it basically is
doable for most Python code.  Something like runtime introspection is a
lot easier when appropriate, and ahem yes, we really should add that to
our shell and debug probe tools!

Stephan Deibel

--
Wing IDE for Python
Archaeopteryx Software, Inc
Take Flight!

www.wingide.com



From jepler at unpythonic.net  Mon Jan  5 22:54:30 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Mon, 5 Jan 2004 21:54:30 -0600
Subject: Repost: Can't sys.exit() from SIGTERM handler?
In-Reply-To: <NFBBICMEBHKIKEFBPLMCIEIEGPAA.aathan-python-5923@cloakmail.com>
References: <20040106013708.GD5514@unpythonic.net>
	<NFBBICMEBHKIKEFBPLMCIEIEGPAA.aathan-python-5923@cloakmail.com>
Message-ID: <20040106035430.GF5514@unpythonic.net>

Python's signal handling is "strange at best".  As I understand it,
when you register a Python function via signal.signal, Python installs a
C signal handler that sets a flag, and then the interpreter checks for
that flag to be set.  If it is set, the Python signal handler is
invoked.  This was an expedient way to do this, because the alternative
(running the Python code in the signal handler) would mean making sure
signal arrival at any moment was safe for the state of Python
objects---a virtually impossible task.

#1.  The idiom for "exit" is either
	sys.exit(<arg>)
or
	raise SystemExit, arg
Everywhere you are writing a "blanket except statement" like
	except:
or
	except Exception:
you will have to write something like
	except (SystemExit, KeyboardInterrupt): raise
as an earlier except clause to get the proper behavior.  This will,
ahem, encourage you to avoid overly broad exception handlers.  Most
Python programs I write don't have any such clause, and Python programs
that need to run in a "server" kind of role probably have exactly one
of them, in the right place to kill a particular connection but leave
the server running.

#2.  You're getting into territory where I've never been.  Thinking that
the problem might be with multiple SIGTERMs delivered to the Python
process, I changed my earlier program and got results I don't
understand.  


:r term2.py
import os, signal, time, sys, traceback

x = 0
def sig(a, b):
	print "Entering exception handler"
	global x
	x = x + 1
	print "sigterm", x
	print "sleeping in exception handler"
	time.sleep(2)
	print "Exiting exception handler"
	x = x - 1
	sys.exit()

signal.signal(signal.SIGTERM, sig)

os.system("(while true; do sleep 1; kill %s || exit; done) &" % os.getpid())

print "Sleeping (should be killed)"

try:
	time.sleep(2)
except SystemExit:
	traceback.print_exc()
	raise

print "sleep finished (!?)"

$ term2.py 
Sleeping (should be killed)
Entering exception handler
sigterm 1
sleeping in exception handler
 Entering exception handler
sigterm 2
sleeping in exception handler
 Entering exception handler
sigterm 3
sleeping in exception handler
 Entering exception handler
sigterm 4
sleeping in exception handler
					# hit ctrl-c here
Traceback (most recent call last):
  File "term2.py", line 22, in ?
    time.sleep(2)
  File "term2.py", line 12, in sig
    print "Exiting exception handler"
  File "term2.py", line 12, in sig
    print "Exiting exception handler"
  File "term2.py", line 12, in sig
    print "Exiting exception handler"
  File "term2.py", line 12, in sig
    print "Exiting exception handler"
KeyboardInterrupt

By commenting out the line "print "Exiting exception handler"" (which
never seemed to be reached !?) gives this behavior:

$ python term2.py 
Sleeping (should be killed)
Entering exception handler
sigterm 1
sleeping in exception handler
Entering exception handler
sigterm 1
sleeping in exception handler
$ sh: line 1: kill: (13961) - No such process

If I had to guess, I'd say that in the first example something about the
'print' statement causes pending Python signal handlers to be invoked,
and in the second example that the Python signal handler is invoked
after the 'except' statement's body is executed but before anything is
printed.

Back to your question, remember that Python exceptions raised in a
signal handler can be handled in the main program (that's how sys.exit
works, after all).  So what if the flow of code looks like this:
	sigterm delivered
		waitpid
			sigterm delivered
				waitpid
when the "inner" waitpid finishes, the outer will wait for the same
process and get the ECHILD exception.  If that's the case, then you
could either wait for your processes in a way that is safe in the
presence of a recursive invocation, such as:
	while list:
		pid = kids.pop()
		os.kill(pid, signal.SIGTERM)
		waitpid(pid, 0)
... another way to make this safe would be a targeted try: except: block
around the waitpid line, if that's the site where you've seen the
exception raised:
	try:
		waitpid(pid, 0)
	except OSError, detail:
		if detail.errno != errno.ECHILD:
			raise
		else:
			react to the fact that the child is already dead

Handling child processes is hopelessly subtle (especially when signals are
in the mix), and I'm sure I've gotten some things here terribly wrong too.
I wish there was somebody else offering you better advice.

Jeff



From mail at malgadey.de  Thu Jan 29 08:34:26 2004
From: mail at malgadey.de (Wolfgang Malgadey)
Date: Thu, 29 Jan 2004 14:34:26 +0100
Subject: Compiled Python binaries
Message-ID: <bvdmde$6ja$1@newsreader2.netcologne.de>

Hello!

i am searching for a resource of compiled python binaries. I am working 
on a spezial linux version (no compiler onboard). It must be linked to 
glibc5.

Maybe you can help?

greets from cologne, germany
Wolfgang Malgadey



From sombDELETE at pobox.ru  Sun Jan  4 17:05:22 2004
From: sombDELETE at pobox.ru (Serge Orlov)
Date: Mon, 5 Jan 2004 01:05:22 +0300
Subject: Creating a capabilities-based restricted execution system
References: <LmmdnUn4seDeGWuiXTWc-w@speakeasy.net>
	<vveg0bb6is2f60@news.supernews.com> <bt7lbp$ovg$1@panix2.panix.com>
	<vveohcpod4oje0@news.supernews.com> <bt82d7$ort$1@panix3.panix.com>
	<vvg0h93ue63c0b@news.supernews.com>
Message-ID: <bta2ng$16v7$1@nadya.doma>


"John Roth" <newsgroups at jhrothjr.com> wrote in message news:vvg0h93ue63c0b at news.supernews.com...
>
> Much of this thread has focused on "capabilities" and the use of
> proxies to implement capabilities. AFIAC, that's not only putting
> attention on mechanism before policy, but it's putting attention on
> mechanism in the wrong place.

I'm not sure why it should be discussed here since Sean refered
to E in the first post (http://www.erights.org/), so I think he's
comfortable with the policy defined by E? I think he has
missed the part that implementation should help as much as
it can prevent leaking capabilities from one security domain to
another. I pointed to that already.

>
> What I *haven't* seen in this thread is very much consideration of
> what people want from a security implementation.

I think Sean is talking about his own implementation. I didn't
see anywhere he said he's going to write general implementation
for other people. He said what he wants from his implementation.

> One problem I've been playing around with is: how would you
> implement something functionally equivalent to the Unix/Linux
> chroot() facility? The boundaries are that it should not require
> coding changes to the application that is being restricted, and it
> should allow any and all Python extension (not C language
> extension) to operate as coded (at least as long as they don't
> try to escape the jail!) Oh, yes. It has to work on Windows,
> so it's not a legitimate response to say: "use chroot()."

I don't see any unsolvable problems. Could you be more specific
what is the problem? (besides time, money, need to support
alternative python implementation, etc...)

-- Serge.




From pythonguy at Hotpop.com  Wed Jan 28 09:13:13 2004
From: pythonguy at Hotpop.com (Anand Pillai)
Date: 28 Jan 2004 06:13:13 -0800
Subject: wxPython: images from URLs
References: <mailman.810.1075149139.12720.python-list@python.org>
	<fgse10l8pae12p0els55fsujllq2irrj0l@4ax.com>
Message-ID: <84fc4588.0401280613.771ac07@posting.google.com>

I have written some code for this in my PyWiew application
which allows one to open image urls directly.

Copying some relevant code from the application...

self._imgstream = urllib2.urlopen(url).read()
stream=cStringIO.StringIO(self._imgstream)

try:
   img=wxImageFromStream(stream)
except:
   pass

In short you do the following.

1. Use urllib or urllib2 to open the image data stream
2. Make a cStringIO string buffer from the data stream
3. Pass it to "wxImageFromStream()" method to get the
   wxImage object.
4. Display the image directly or by converting to 
   a suitable format using PIL.

In my experience I found that wxWindows tend to
display an error message window when the image is displayed
directly as a wxImage though the image data is quite ok.
(Something like a corrupt stream dialog). So what I have
done in the application is, use PIL to convert the wxImage
to Windows BMP format and then display it. This seems
to work for all images.

HTH.

-Anand

          

Tim Roberts <timr at probo.com> wrote in message news:<fgse10l8pae12p0els55fsujllq2irrj0l at 4ax.com>...
> Jonathan Daugherty <cygnus at cprogrammer.org> wrote:
> >
> >Does anyone here know if the wxImage class in wxPython supports dislaying
> >images from URLs?
> 
> wxImage will read from a file or from a wxWindows stream.  It won't
> download from a web site, but that's trivially easy using something like
> urllib.


From gagenellina at softlab.com.ar  Fri Jan  2 19:49:03 2004
From: gagenellina at softlab.com.ar (Gabriel Genellina)
Date: Fri, 02 Jan 2004 21:49:03 -0300
Subject: NEWBIE: Sub-classes revisited
In-Reply-To: <bsn6vv0v94rljdeom9k4i7t8s3o5t66i0o@4ax.com>
Message-ID: <5.2.1.1.0.20040102204815.023f1340@192.168.0.115>

At 31/12/2003 15:47, you wrote:

># IN MOD_1.PY
>
>class B:
>     def __init__ (self):
>         self.B_init_var = 1
>     def B_meth(self):
>         self.B_meth_var = 2
>
># IN MOD_2.PY
>
>import mod_1
>
>class A(mod_1.B):              # B needs to be qualified
>     def __init__(self):
>         mod_1.B.__init__(self) # Needs to be qualified
>         self.B_meth()          # But B's method doesn't
>         print self.B_init_var  # Just to be sure
>         print self.B_meth_var  # Ditto

Apart from trial-and-error and self-discoving things, which is really good, 
you should read the Python Tutorial which is very good too. If you did 
already, do it again, specially section 9 (Classes).

>Is the following true?
>
>1. When A is instantiated, B's name space is exposed
>    to A.

No. Python uses dynamic binding. If you come from a statically-binded 
language like Java or C++ this may be confusing. In Python, the attributes 
and methods are searched *looking*inside*the*instance*, not by knowledge of 
some prior declarations of type.
At the beginning of A.__init__ the 'self' parameter has been constructed, 
and you can use its attributes and methods (as far as nothing depends of 
__init__). By example, you can use: self.B_meth()


>2. B is not instantiated when A is,
>    therefore B's init is not run.

No. The object is already constructed; __init__ is an initializer, not a 
constructor. See above.

>3. If A can't find B_meth in it's own namespace,
>    it looks in B's namespace.

Yes. And if not found there, in its parent and so on. See section 9.5.1 in 
the Python tutorial.

>4. If one attempts to run B's init in A's init,
>    using self.__init__(), one is in for a long wait...:)

Yes...

>5. B's init in A's init must be qualified to prevent #4

Yes, and to specify *which* init you want to call, in case of multiple 
inheritance.

>6. The proper terminology is:
>    'A inherits B's methods and attributes'

Yes. Maybe a purist would object something but it's ok...

>7. An init in B is of limited usefulness.

Why? B.__init__ should do whatever is needed to properly initialize class 
B. Usually you inherit to specialize behaviour. In BaseHTTPServer.py you 
have class HTTPServer which inherits from TCPServer which inherits from 
BaseServer; each one has its own responsabilities; altough you could have 
written all that stuff in just one class, that would be difficult to reuse 
or modify.

>8. If all one needs is to 'declare and inialize'
>    variables common to a number of classes, one
>    really doesn't need a base class,
>    just a module containing the 'constants'.
>    But if there are methods which are semi-common
>    to all sub-classes, and can be overidden or
>    extended to do the job, then it makes sense to
>    use inheritance.

Mmm, no. In an OO environment, classes are used to build a *model* of 
something, you *design* using classes and inheritance and hierarchies and 
composition and delegation... Look for any OO design introduction.

>9. Inheriting variables (only), then (always)
>    over riding their values in the sub-classes
>    doesn't save memory.

I don't understand this. You can save some memory if you declare default 
values for attributes inside the class (*not* assigning them to self), As 
far as they are never changed, they are shared by all instances. Is this 
what you mean?

class Example:
     x = 1

class Example2(Example):
     x = 2

a = Example2()
print a.x       # prints 2
b = Example2()
print b.x       # prints 2; both refer to the same shared attribute
a.x = 3 # now 'a' contains its own instance attribute
print a.x       # prints 3


Gabriel Genellina
Softlab SRL




From michele.simionato at poste.it  Tue Jan 13 09:28:16 2004
From: michele.simionato at poste.it (Michele Simionato)
Date: 13 Jan 2004 06:28:16 -0800
Subject: Why learn Python ??
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<877jzwg1v2.fsf@pobox.com>
Message-ID: <95aa1afa.0401130628.7992e9e1@posting.google.com>

jjl at pobox.com (John J. Lee) wrote in message news:<877jzwg1v2.fsf at pobox.com>..
> Eiffel: Design by contract.  The book to read is Meyer's "Object-
>  Oriented Software Construction".  Full of interesting stuff, if you can
>  stand his self-importance ;-)

I couldn't!


From alf at calvin.fayauffre.org  Tue Jan  6 02:27:47 2004
From: alf at calvin.fayauffre.org (Alexandre Fayolle)
Date: Tue, 6 Jan 2004 07:27:47 +0000 (UTC)
Subject: UML tools for python
References: <13dc97b8.0312301543.39192aa2@posting.google.com>
	<slrnbvisrm.3oo.alf@largo.fayauffre.org>
	<13dc97b8.0401051848.11205ed4@posting.google.com>
Message-ID: <slrnbvkorj.tl.alf@largo.fayauffre.org>

Le 06-01-2004, Andy Bulka <abulka at netspace.net.au> a ?crit?:

> I *have* reported numerous problems with pyreverse to your mailing
> list.  Why do you say I haven't?  Specifically:
>
>  Jun 2003 DOCTYPE XMI directive and MSXML3 parser
>  Feb 2003 Running the latest version locks up when no -d option
>  Feb 2003 Pyreverse 0.4.2 requires logilab.common and
> optik.OptionParser ?
>  Dec 2002 Fwd: [Gentleware #12069] Poseidon - version 1.5 XMI import
> prob.
>
> and many more before that.  And I appreciate you guys responding -
> great. 

Whoops. I realize I had not checked the mailing lists archives
correctly. I apologize. 


> Anyway - ideally I was hoping for a robust discussion by senior Python
> people on what they may be using with regards to UML and what their
> feelings are about the situation. UML is very important yet there is
> no GUI driven two-way tool for python programmers.  Surely serious,
> larger scale, software development in Python would want to be using
> UML as part of the process?

Well, not necessarily. Of course I can only speek for myself (and a bit
for my company), but my prefered UML modelling tool is a whiteboard,
used in conjunction with Agile Modelling practices
(http://www.agilemodeling.com). And even then I tend to model lightly,
because the projects on which I work are generally fast moving targets,
which means that heavy up front modelling often results in waisted effort. 
We found that on demand modelling sessions on the whiteboard to answer
specific questions provided the best results. The code we produce ends
up being refactored very often as requirements change anyway, and
maintaining up to date models costs us too much time. 

-- 
Alexandre Fayolle
LOGILAB, Paris (France).
http://www.logilab.com   http://www.logilab.fr  http://www.logilab.org
D?veloppement logiciel avanc? - Intelligence Artificielle - Formations


From jarausch at skynet.be  Tue Jan 27 12:44:09 2004
From: jarausch at skynet.be (Helmut Jarausch)
Date: Tue, 27 Jan 2004 18:44:09 +0100
Subject: How does compare work?
In-Reply-To: <mailman.821.1075160455.12720.python-list@python.org>
References: <40158680$0$7044$ba620e4c@news.skynet.be>
	<mailman.821.1075160455.12720.python-list@python.org>
Message-ID: <4016A368.9050806@skynet.be>

Terry Reedy wrote:
> "Helmut Jarausch" <jarausch at skynet.be> wrote in message
> news:40158680$0$7044$ba620e4c at news.skynet.be...
> 
>>what does Python do if two objects aren't comparable (to my opinion)
> 
> 
> Sorry, Python does what it does, which is generally to compare any two
> objects unless explicitly disabled as with complex numbers or in
> user-written method of user class.
> 
> 
>>If I've understood "Python in a Nutschell" correctly it should raise an
>>exception but it doesn't do for me.
> 
> 
> Perhaps you could quote the line that mislead you, and someone could
> explain, or suggest a change to the author.
> 

First let me say that IMHO this is a big misdesign of Python.
I've come to Python from Perl since many posts convinced me that Python
is safer - and mostly it is.
But silently(!) comparing apples with pears is evil. E.g. the example I 
came across this was

thresh=raw_input('enter threshold')
...
level=2
...
if level > thresh :

which failed miserably. By the way, Perl does convert the string to an 
integer silenty and, as most of the time, these Perl conversions are 
just what one wants, so here.
Nevertheless, I'd prefer an exception in this case since automatic 
conversions can never be right in all circumstances.
So this is a case where Python is a very dangerous language!

For the quotation
In my 'Python in a Nutshell' by Alex Martelli (a tremendously good 
book), 1st edition on page 91 (Special Methods) it reads
__cmp__  ......
...............
          When __cmp__ is also absent, order comparisons (<,<=,>,>=)
          raise exceptions. Equality comparisons (==,!=), in this case,
          become identity checks: x==y evaluates  id(x)==id(y) (i.e.,
          x is y)

end of quotation.
I wish this were true for the current Python implementation.

Helmut.

-- 
Helmut Jarausch

Lehrstuhl fuer Numerische Mathematik
RWTH - Aachen University
D 52056 Aachen, Germany



From amk at amk.ca  Fri Jan 30 21:12:17 2004
From: amk at amk.ca (A.M. Kuchling)
Date: Fri, 30 Jan 2004 20:12:17 -0600
Subject: RESTful Python
References: <mailman.1022.1075441155.12720.python-list@python.org>
Message-ID: <NM2dndpOnomckobdRVn-uQ@speakeasy.net>

On Fri, 30 Jan 2004 13:39:02 +0800, 
	SimonW <drconrad at metaplay.com.au> wrote:
> I want to be able to address sections of an XML document using an URI,
> but I am not sure how to implement this. I've seen this done in Python
> before, however I cannot find the site again, and cannot recall the
> correct google incantations to re-discover it.

The usual way would be to use a fragment identifier, so that the client can
find the right element, e.g. http://example.com/foo.xml#id45 means
downloading foo.xml and looking for the element with an id="id45" attribute.
But the fragment identifier isn't sent to the HTTP server, so you couldn't
do a DEL or PUT to replace just that fragment; I don't know if that's what
you want.

> Can anyone point me to some REST style implementations in Python?

Someone's already pointed you to Dave Kuhlman's article on REST and Quixote,
which is a good start.

--amk


From llothar at web.de  Fri Jan 30 21:58:46 2004
From: llothar at web.de (Lothar Scholz)
Date: 30 Jan 2004 18:58:46 -0800
Subject: Chart drawing library for Python
References: <6ee58e07.0401280403.3d52a9e0@posting.google.com>
	<87k739xcaq.fsf@andreasen.org>
Message-ID: <6ee58e07.0401301858.2d3cc1b5@posting.google.com>

"Erwin S. Andreasen" <erwin+usenet at andreasen.org> wrote in message news:<87k739xcaq.fsf at andreasen.org>...
> llothar at web.de (Lothar Scholz) writes:
> 
> > is there something like "JpGraph" for python ?
> > For those who don't know this PHP library: It is a high level
> > drawing library that generates gif files with all kind of charts.
> 
> I've used gdchart previously but these days I use ChartDirector which,
> although being a commercial program ($99), was well-worth the money
> for me.
> 
> It produces high-quality charts, is very flexible (e.g. you can
> overlay different chart types, add custom symbols, produce HTML image
> maps) and has excellent bindings for Python and many languages.
> 
> Also, I've found the support to be unusually friendly, accurate and
> fast. The documentation is good enough so you won't need it much (and
> customised to each language too, with something like 100 examples).
> 
> Some samples:
>  http://www.advsofteng.com/gallery.html

Thanks. I would buy it but there are two problems: First it is  US$
499 when i use it in a program and then there is only a precompiled
library for LINUX. It's okay to get a precompiled library for windows.
But my experiences with binary Linux API changes are really bad, on
for this i can only accept source code, at least when i pay US$ 499.
And the footprint of the library seems also to be a little bit high
with 3 MB.


From brian at bluecoat93.org  Fri Jan 16 12:31:25 2004
From: brian at bluecoat93.org (Brian Landers)
Date: 16 Jan 2004 09:31:25 -0800
Subject: [ANNOUNCE]  PyGoogle has a new maintainer and home
Message-ID: <mailman.1074275522.13388.clpa-moderators@python.org>

I have recently taken over the maintenance and development of
PyGoogle, a native Python module for accessing the Google Web APIs. 
Currently, it allows you to search Google, retrieve a page from the
cache, and ask Google for spelling corrections.

This module was originally developed by Mark Pilgrim
(http://www.diveintomark.org) and now lives at SourceForge.  Please
take a look if you are interested in developing Google Web API
applications in Python.

http://pygoogle.sourceforge.net

Thanks,
Brian



From sax at csmisc72.cs.chalmers.se  Fri Jan 30 11:36:15 2004
From: sax at csmisc72.cs.chalmers.se (Stefan Axelsson)
Date: 30 Jan 2004 16:36:15 GMT
Subject: Simple list question
References: <bvdub7$ksc$1@ucsnew1.ncl.ac.uk>
	<mailman.1047.1075478440.12720.python-list@python.org>
Message-ID: <slrnc1l1vv.plv.sax@csmisc72.cs.chalmers.se>

In article <mailman.1047.1075478440.12720.python-list at python.org>, Dave Brueck wrote:
> How about:
> 
>>>> nod = ['1','+','2']
>>>> for i in range(len(nod)):
> ...   try:
> ...     nod[i] = float(nod[i])
> ...   except ValueError: pass
> ...
>>>> nod
> [1.0, '+', 2.0]

Perhaps minor style issue; I'd use 'map' (even though Guido isn't
crazy about it), or perhaps a list comprehension.

Like so:

>>> def tofloat(x):
...     try:
...             return float(x)
...     except ValueError: return x
...

>>> map(tofloat, nod)
[1.0, '+', 2.0]

Stefan,
-- 
Stefan Axelsson                  (email at http://www.cs.chalmers.se/~sax)


From newsgroups at jhrothjr.com  Thu Jan  8 06:42:11 2004
From: newsgroups at jhrothjr.com (John Roth)
Date: Thu, 8 Jan 2004 06:42:11 -0500
Subject: Why " ".some_string is often used ?
References: <Xns94698A5566736stefninnospamyahoofr@213.228.0.4>
Message-ID: <vvqghojub1dl07@news.supernews.com>

"St?phane Ninin" <stefnin.nospam at yahoo.fr> wrote in message
news:Xns94698A5566736stefninnospamyahoofr at 213.228.0.4...
>
>   Hi all,
>
> This is not the first time I see this way of coding in Python and
> I wonder why this is coded this way:
>
> Howto on PyXML
> (http://pyxml.sourceforge.net/topics/howto/node14.html)
> shows it on this function, but I saw that in many other pieces of code:
>
> def normalize_whitespace(text):
>     "Remove redundant whitespace from a string"
>     return ' '.join(text.split())
>
> Is there a reason to do instead of just returning join(text.split()) ?
> why concatenate " " to the string and not just returning the string
instead ?

This particular idiom replaces sequences of multiple whitespace
charaters with a single blank.

And I agree, it's not entirely obvious why it's a string
method rather than a list method, since it operates on
a list, not on a string. The only explanation that makes
sense is that, as a list method, it would fail if the list
contained something other than a string. That's still
not very friendly, though.

John Roth
>
> Thanks in advance for your explanations.
>
>   Regards,
>
> -- 
> Stephane Ninin
>
>
>




From pierren at mac.com  Wed Jan 28 07:02:17 2004
From: pierren at mac.com (Pierre N)
Date: Wed, 28 Jan 2004 12:02:17 +0000
Subject: package similar to XML::Simple
In-Reply-To: <bv80qq$kbg$1@sunnews.cern.ch>
References: <bv80qq$kbg$1@sunnews.cern.ch>
Message-ID: <1075291336.4813.42.camel@Pismo>

I'm using pyRXP, and it's great.
It's using one tuple, not dictionnaries.
Very very fast.
By the way I'm just starting using this package, anybody met any
problems with pyRXP?

-- Pierre


On Wed, 2004-01-28 at 09:53, Paulo Pinto wrote:
> Hi,
> 
> 
> does anyone know of a Python package that
> is able to load XML like the XML::Simple
> Perl package does?
> 
> For those that don't know it, this package
> maps the XML file to a dictionary.
> 
> Of course I can build such a package myself
> but it would be better if it already exists :)
> 
> --
> Paulo Pinto




From usenet at mail-2-me.com  Sat Jan 31 17:56:25 2004
From: usenet at mail-2-me.com (Dirk Hagemann)
Date: Sat, 31 Jan 2004 23:56:25 +0100
Subject: Running External Programs from Within Python
In-Reply-To: <mailman.1081.1075583900.12720.python-list@python.org>
References: <5a40bf6a.0401311123.4b7f783f@posting.google.com>	<5a40bf6a.0401311123.4b7f783f@posting.google.com>
	<mailman.1081.1075583900.12720.python-list@python.org>
Message-ID: <bvhbr7$6rj$07$1@news.t-online.com>

RayS wrote:
> Hi Dirk,
> 
>> That is very easy: popen()
>> Check the FAQ and documentation again for popen.
> 
> 
> That reminds me, I was asked if you can open a bi-directional pipe to 
> control an external console program on Windows. A guy has compiled 
> FORTRAN (~4,000 lines of 1980's spaghetti) and wants to add a modern GUI 
> and a front end method to check data.
> Can you both send commands to, and read STDOUT from, a remote console app?
> 
> Ray
> 
> 
I'm not sure if I got the point, but, for example, with popen I can ping 
from the console a computer and read the result.
But sending commands to a remote console is a problem which troubles 
myself in another context (I asked here yesterday).

Dirk


From newsgroups at jhrothjr.com  Wed Jan  7 11:24:50 2004
From: newsgroups at jhrothjr.com (John Roth)
Date: Wed, 7 Jan 2004 11:24:50 -0500
Subject: Pre-PEP: Dynamically evaluating default function arguments
References: <338366A6D2E2CA4C9DAEAE652E12A1DE010633FF@au3010avexu1.global.avaya.com>
	<mailman.179.1073485918.12720.python-list@python.org>
Message-ID: <vvocop9u1ff1a4@news.supernews.com>


"Gerrit Holl" <gerrit at nl.linux.org> wrote in message
news:mailman.179.1073485918.12720.python-list at python.org...
> Delaney, Timothy C (Timothy) wrote:
> > IMO it's not a waste of time for this PEP to be written. Unfortunately,
not many people are willing to formally document something that they would
like to see when the guaranteed result is that it will be rejected.
>
> PEP 313?

It hasn't been rejected yet. Pep CCCIXXX is needed
to set the state of the Abacus objects correctly. The
Comp Center needs this in case of a casastrophic
systems failure.

Pep 666, on the other hand, was submitted explicitly
for rejection. Maybe this one should be 668 (the neighbor
of the beast?)

John Roth
>
> :)
>
> Gerrit.




From whiteywidow at yahoo.com  Wed Jan 21 12:24:06 2004
From: whiteywidow at yahoo.com (rt lange)
Date: Wed, 21 Jan 2004 17:24:06 GMT
Subject: Jython and SciTE
Message-ID: <Xns94777EDCF72A2whiteywidowyahoocom@216.77.188.18>

I'm trying to get SciTE to run and compile my jython scripts.
This is what I have in my python.properties file:

command.name.1.*.py=Go Jython
command.1.*.py=jython $(FileNameExt)
command.1.subsystem.*.py=1
command.name.2.*.py=Jython -> jar
command.2.*.py=jythonc --core --jar $(FileName).jar $(FileNameExt)
command.2.subsystem.*.py=1

I keep getting as output:

>jython DiceRoll.py
>The system cannot find the file specified.

>jythonc --core --jar DiceRoll.jar DiceRoll.py
>The system cannot find the file specified.

It works fine from the command line (PATH is set correctly.)

 


From yan at NsOeSiPnAeMr.com  Tue Jan 27 11:27:27 2004
From: yan at NsOeSiPnAeMr.com (Kamus of Kadizhar)
Date: Tue, 27 Jan 2004 11:27:27 -0500
Subject: phpwiki and mySQL
Message-ID: <pan.2004.01.27.16.27.26.281792@NsOeSiPnAeMr.com>

I've got a mySQL error that I hope someone can decipher for me.

(LOCK TABLES page WRITE,version WRITE,link WRITE,recent WRITE,nonempty
WRITE [nativecode=1044 ** Access denied for user: 'yan at localhost' to
database 'phpwiki'])

The app is phpwiki (phpwiki.sf.net) and AFAICT my userid, login, etc. are
correct.

I know very little about mySQL.  Does the above mean I don't have write
permission to the database?  Or is this something best taken to the mySQL
list?

TIA,

--Kamus


From aldo123 at onet.pl  Thu Jan  8 04:15:59 2004
From: aldo123 at onet.pl (mic)
Date: Thu, 8 Jan 2004 10:15:59 +0100
Subject: win32: internet explorer automation problem
Message-ID: <btj74m$s1l$1@news.atman.pl>

I'm currently trying to write an MSIE automation software and have run into
such problem - have no idea how to take control of external popup windows -
I use WebBrowser COM object and am able to catch the NewWindow2 event, but
don't know how to change 'focus' to other than main explorer window. I tried
to use winguiauto package and am able to get the HWND of the 'Internet
Explorer Server' control located in that new window, but I don't know
whether it is possible to force it to be my new COM object.

Regards,

Michal Zylinski




From forsale2tor at yahoo.com  Tue Jan 13 12:36:57 2004
From: forsale2tor at yahoo.com (Victor)
Date: 13 Jan 2004 09:36:57 -0800
Subject: Visual Jython idea brainstorming welcome
Message-ID: <1db780c8.0401130936.88d1da4@posting.google.com>

Hi all,

I had this idea two minutes ago. I am proprosing an idea to build an
IDE called "Visual Jython" with Eclipse technology. This IDE is
targeted towards building enterprise client applications running any
Java platform mostly non-web based clients.

My background is diversed in UNIX variants, Java and Python. Here are
something off the top of my head.

1. Basically from UI perspective, it will be like as name implied
"Visual Studio" like.

2. plug in architecture
This IDE should define or use a componenent architecture to plug &
play component written in Java confining to a Jython Plug in API. For
instance, we can develop plug in for ODBC, Oracle, DB2, Informix, MQ,
SAP etc for enterprise uses.


3. gluing languag--Jython
maybe we need funding to support Jython for this matter to make it
commerical quality.


4. .NET integration?
Should this IDE generate code that can run on top of .NET to attract
more VB/.Net programmers into this field?



Welcome comments on features this IDE should have. 

cheers,
Victor


From fumanchu at amor.org  Tue Jan 13 13:02:51 2004
From: fumanchu at amor.org (Robert Brewer)
Date: Tue, 13 Jan 2004 10:02:51 -0800
Subject: Design Question
Message-ID: <DE1CF2B4FEC4A342BF62B6B2B334601E561BF6@opus.amorhq.net>

> I have a question which is more about OO design than Python per se. 
> I've noticed that a number of posters to this list have very good
> suggestions for SE issues, so I'm hoping that someone will be able to
> give me some guidance.
> 
> My question is about how to architect a class hierarchy where some
> methods are nearly identical between a superclass and a subclass, but
> differ slightly.  For example:
> 
> class Sup(object):
>    def __init__(self):
>       self.specialFlag = False
>    def aMeth(self):
>        <do some stuff>
>        <if self.specialFlag, do a special thing>
>        <do more stuff>
> 
> class Sub(Sup):
>   def __init__(self):
>     self.specialFlag = True
> 
> In this example, the method aMeth just checks for specialFlag, and if
> it's True, does the special stuff required.

Since classes in Python are "first class objects" just like instances, I
often modify arrangements like your example to:

class Sup(object):
    specialFlag = False
    
    def aMeth(self):
        doStuff()
        if self.specialFlag:
            doSpecialThing()
        doMoreStuff()

class Sub(Sup):
    specialFlag = True

If you never assign self.specialFlag, it remains a "class attribute"
(that is, since specialFlag is never bound to the instance, it continues
to be looked up in the class dict).

Once you've done *that*, you then see further options. In my designs, I
tend to eliminate such flags, replacing them with the actual behavior
which the flag references:

class Sup(object):
    specialThing = []
    
    def aMeth(self):
        doStuff()
        for eachItem in self.specialThing:
            doMoreStuff(eachItem)

class Sub(Sup):
    specialThing = [1, 2, 3]

---or---

class Sup(object):
    specialThing = lambda x: None
    
    def __init__(self):
        self.x = 0
        self.y = 0
    
    def aMeth(self):
        doStuff()
        self.y = self.specialThing(self.x)
        doMoreStuff()

class Sub(Sup):
    specialThing = lambda x: x[4] + 3

Which one you choose will be dependent upon your design.


Robert Brewer
MIS
Amor Ministries
fumanchu at amor.org



From csgcsg39 at hotmail.com  Thu Jan 15 06:06:45 2004
From: csgcsg39 at hotmail.com (C GIllespie)
Date: Thu, 15 Jan 2004 11:06:45 -0000
Subject: urllib problem
Message-ID: <bu5s72$oue$1@ucsnew1.ncl.ac.uk>

Dear All,

I'm having problems using the urllib module and was wondering if anyone
could suggest a solution. The only thing I can thing of is that I'm using at
university and my uni uses a compulsory proxy.

I'm using the python 2.3.3 and have tried both windows and Linux
environments. I've tried different urls as well.

Here's the code and error message I get

Thanks

Colin

import urllib
usock=urllib.urlopen('http://slashdot.org/slashdot.rdf')

Traceback (most recent call last):
File "<stdin>", line 1, in ?
File "/usr/lib/python2.3/urllib.py", line 76, in urlopen
return opener.open(url)
File "/usr/lib/python2.3/urllib.py", line 181, in open
return getattr(self, name)(url)
File "/usr/lib/python2.3/urllib.py", line 297, in open_http
h.endheaders()
File "/usr/lib/python2.3/httplib.py", line 712, in endheaders
self._send_output()
File "/usr/lib/python2.3/httplib.py", line 597, in _send_output
self.send(msg)
File "/usr/lib/python2.3/httplib.py", line 564, in send
self.connect()
File "/usr/lib/python2.3/httplib.py", line 548, in connect
raise socket.error, msg
IOError: [Errno socket error] (113, 'No route to host')




From mk at net.mail.penguinista  Wed Jan 14 18:13:07 2004
From: mk at net.mail.penguinista (=?UTF-8?B?0LTQsNC80ZjQsNC9INCzLg==?=)
Date: Thu, 15 Jan 2004 00:13:07 +0100
Subject: [OT] AS/400
References: <mailman.352.1074092092.12720.python-list@python.org>
	<bu4a5n$k9$6@atlantis.news.tpi.pl>
Message-ID: <4005cd03@news.mt.net.mk>


> (will not mention that it works on AS/400, the best
> minicomputer(!) ever made).

Why is it the best minicomputer ever made?
I really want to know!


-- 
??????                                  (jabberID:damjan at bagra.net.mk)

              To boldly go where I surely don't belong.


From cookedm+news at physics.mcmaster.ca  Thu Jan 22 21:59:45 2004
From: cookedm+news at physics.mcmaster.ca (David M. Cooke)
Date: Thu, 22 Jan 2004 21:59:45 -0500
Subject: I support PEP 326
References: <mailman.654.1074788734.12720.python-list@python.org>
	<401081A1.E4C34F00@alcyone.com>
Message-ID: <qnky8rzid3y.fsf@arbutus.physics.mcmaster.ca>

At some point, Erik Max Francis <max at alcyone.com> wrote:
> Gary Robinson wrote:
>> If there anywhere else I should be expressing my opinion on this, let
>> me
>> know.
>
> Seems quite reasonable to me.  The only issue I'd take with it is the
> choice of Min and Max for the names of the singletons; they're a little
> too close to the functions min and max, which obviously they're both
> likely to be used with.  I would suggest something a little more verbose
> such as Minimum and Maximum, or if you want to get silly, Infimum and
> Supremum.

Or, expressing the idea that they're the ends of a number line:

PosInf, NegInf
PosInfinity, NegInfinity
PositiveInfinity, NegativeInfinity

If IEEE floating point was done correctly everywhere, I'd say make
them the corresponding floating-point constants (Inf+ and Inf-).

Or,
FreakingHuge, FreakingHugeTheOtherWay

-- 
|>|\/|<
/--------------------------------------------------------------------------\
|David M. Cooke
|cookedm(at)physics(dot)mcmaster(dot)ca


From alessandro at sephiroth.it  Wed Jan 14 20:17:11 2004
From: alessandro at sephiroth.it (Alessandro Crugnola *sephiroth*)
Date: Thu, 15 Jan 2004 01:17:11 GMT
Subject: dde
References: <8EFMb.102403$_P.3808599@news4.tin.it>
	<f3s900dhej5v8pd7dnurrpo0gl7i7v4d2k@4ax.com>
Message-ID: <rSlNb.118089$_P.4278876@news4.tin.it>


"Tim Roberts" <timr at probo.com> ha scritto nel messaggio news:f3s900dhej5v8pd7dnurrpo0gl7i7v4d2k at 4ax.com...
> "Alessandro Crugnola *sephiroth*" <alessandro at sephiroth.it> wrote:
> >
> >Hi all
> >I would like to send dde messages to an application, but i don't know which messages it supports.
> >Is possible to do in some way or I absolutely need the api specifications?
>
> You need specs and/or examples.  One of the biggest shortcomings of DDE is
> that it is there is no way to ask an application what operations it
> supports.  Worse, there is no particular standard for the format of DDE
> messages, so even if you know the function you want to perform, you can't
> guess what the message and its parameters should be.

I imagine.. thanks

>
> What DDE app are you trying to control?

macromedia Flash

> -- 
> - Tim Roberts, timr at probo.com
>   Providenza & Boekelheide, Inc.




From reply.in.the.newsgroup at my.address.is.invalid  Thu Jan  8 15:51:56 2004
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Thu, 08 Jan 2004 21:51:56 +0100
Subject: books
References: <3FFDC029.AB0A4097@unet.univie.ac.at>
Message-ID: <sfgrvvgms0girvmtuernfp6i7c4qqcs7r2@4ax.com>

Thomas Mang:
>Which books would you recommend to buy?
>
>I am both looking for an introduction into the language, as well as
>complete guides.

http://www.python.org/cgi-bin/moinmoin/IntroductoryBooks

I've used the online Python tutorial
(http://www.python.org/doc/current/tut/tut.html), Programming Python
(http://www.amazon.com/exec/obidos/tg/detail/-/0596000855/ref=pd_bxgy_text_1/002-2113420-5243224?v=glance&s=books&st=*)
and Python in a Nutshell (http://safari.oreilly.com/0596001886) to get
started myself.

-- 
Ren? Pijlman


From tim.one at comcast.net  Sun Jan  4 16:13:29 2004
From: tim.one at comcast.net (Tim Peters)
Date: Sun, 4 Jan 2004 16:13:29 -0500
Subject: Is Python Mac Centric??? 
In-Reply-To: <Pine.LNX.4.44.0401041425440.6970-100000@aristocat.lysator.liu.se>
Message-ID: <LNBBLJKPBEHFEDALKOLCOELHICAB.tim.one@comcast.net>

[Tim]
>> Mark likes having a release schedule independent of Python's, and
>> Guido hates Mark's coding style.  Both act against folding the
>> Windows extensions into the core.

[Peter ?strand]
> So, theoretically, if another person stepped forward that re-indented
> the source code and was happy about following the Python release
> schedule, then the extensions could be added?

Not really.  It would have to be someone who could make a credible case that
they're going to continue supporting this spinoff of Mark's work, year after
year.  Guido has grown (with good reason) wary of accepting code into the
core unless it comes with a credible plan for supporting it after the
initial contributor loses interest (gets a real job <wink>, dies, etc).

> I think it's a shame that such minor issues as coding style and
> release schedules should block an important thing like this.

To the contrary, it's ongoing maintenance that consumes the most time in any
project, and those "minor issues" are major from that perspective.
Python-style docs and test suites would also need to be created.




From premshree_python at yahoo.co.in  Sun Jan 25 07:53:23 2004
From: premshree_python at yahoo.co.in (=?iso-8859-1?q?Premshree=20Pillai?=)
Date: Sun, 25 Jan 2004 12:53:23 +0000 (GMT)
Subject: makeExe.py
Message-ID: <20040125125323.65486.qmail@web8307.mail.in.yahoo.com>

Wrote a simple Python script that makes life a wee bit
easier when using py2exe:

Also available at
http://premshree.resource-locator.com/python/makeExe.py

"""
makeExe.py
- Simple Python script to automate the creation
  of Python executables using py2exe.

(c) 2004 Premshree Pillai (24/01/04)
http://www.qiksearch.com/
"""

## Run this file from Python root dir

import sys
import re

fileName = raw_input("Enter file name (rel or abs
path, eg., python/file.py): ")

package = re.split(":",fileName)
package = re.split("/",package[len(package) - 1])
package = re.split(".py",package[len(package) - 1])
package = package[0]

fp = open("setup.py","w")
temp = """from distutils.core import setup
import py2exe
setup(name = "%s",
     scripts = ["%s"],
)""" % (package,fileName)
fp.write(temp)
fp.close()

sys.argv.append("py2exe")
execfile("setup.py")

fp = open("setup.py","w")
temp = ""
fp.write(temp)
fp.close()

print "\n", "Executable created!"
print "Press <enter> to exit..."
if(raw_input()):
	exit


=====
-Premshree
[http://www.qiksearch.com/]

________________________________________________________________________
Yahoo! India Mobile: Download the latest polyphonic ringtones.
Go to http://in.mobile.yahoo.com



From clifford.wells at comcast.net  Sat Jan 24 17:40:04 2004
From: clifford.wells at comcast.net (Cliff Wells)
Date: Sat, 24 Jan 2004 14:40:04 -0800
Subject: [OPINION] - does language really matter if they all do the
	same thing?
In-Reply-To: <20040123183127.GA35281@mail.hitmedia.com>
References: <20040123183127.GA35281@mail.hitmedia.com>
Message-ID: <1074984003.13581.1036.camel@devilbox.homelinux.net>

On Fri, 2004-01-23 at 10:31, Python Baby wrote:
> Are programming languages like spoken languages, in the sense
> that they all say the same things, just using different words?

As others have said, languages all constrain how you think in one way or
another, even "natural" languages.  Programming languages are even
worse, since even "general purpose" programming languages are designed
to fit a certain criteria that makes them more expressive in one way and
less in another.

> Can Ruby do something (important) that Python can't?
> Can Python do something (important) that PHP can't?
> Can PHP do something (important) that Ruby or Python can't?

It's interesting that you mention this as I'm a long-time Python
programmer who just got his first taste of PHP (required for a job).  If
it's a simple matter of choosing between Python and PHP, the things that
have struck me so far are as follows:

1. PHP is a much "noisier" language than Python.  Braces, semicolons,
variable declarations, $ notation on variables, arrays declared as if
they are a function (array()) rather than direct language syntax, etc. 
This is mostly cosmetic and doesn't detract from the usefulness of the
language, and for a language targeted at the web, there is a definite
advantage to using braces as block-delimiters, if not the other "noise".

2.  PHP and Python are both very dynamic, although they do it in
somewhat different ways.  As an example, in Python, to get a reference
(pointer) to a function, you'd just refer to the function without
parentheses.  In PHP you'd probably use a string with the function name
and call it.  I prefer Python's method of string interpolation over
PHP's.  This sounds like a minor nit, but if you're dynamically
generating text, then you get this minor nit a lot.  PHP's method isn't
bad if the strings are inline, but if you are reading text from one file
and substituting values into it from another, Python's method is much
simpler.

3.  PHP's object-model appears remarkably similar to Python's on the
surface.  This similarity is only skin-deep, however. It is openly
acknowledged that OO won't fully be supported until PHP5 is released,
but it's possible to use it in 4 (as I have been).  As such, I'm
reluctant to criticize it too much as it really isn't bad, but it
appears incomplete (and some features are outright broken at the
moment).  Not to mention it's pretty damn slow.  Hopefully this will be
taken care of in PHP5. 

Most of the problems I've had with PHP have not been with the language
itself (which really doesn't seem that bad), but rather with the
implementation (i.e. the interpreter).  Poor error reporting, bugs,
general slowness, immature libraries, etc.  Obviously PHP has some
strengths in the web arena (ability to arbitrarily intermix PHP and HTML
being the most noticable, although getting carried away with this seems
like a bad idea).

> Are they all just the same, and it's just a matter of taste?

It depends.  If you're comparing PHP and Python, then the answer is
"yes, to a great extent".  If you're comparing Python and a language
like C, then the answer is a definite no.  You might be able to get
similar results, but how you get there will be completely different.

> Should I stick with PHP for the same reason that pop singers
> worldwide sing in English for maximum compatibility with the medium?

Only you can decide that.  Try Python and see if it "fits your brain" as
many here like to describe it.  Just be sure to give it a fair shake as
any new tool is bound to be occasionally frustrating (as has been the
case for me with PHP).

> Though PHP wasn't design for OOP should I use it that way anyway?

If you aren't familiar with OOP, then no.  There are far too many bugs
and problems with the current OO implementation in PHP.  You'll pull
your hair out trying to get things that *should* work to do as you
expect.  If you're familiar with OOP and think you can work around PHP's
shortcomings in this area, then sure.  I'm fairly happy with the results
I've gotten, although it took twice as long as it would have taken were
I to have done it in Python (at least some of this is due to my being
new to PHP, but more of it was due to the lack of adequate error
reporting and obscure bugs and misfeatures).


Regards,
Cliff


-- 
I have seen too much, wipe away my eyes
                              -Bauhaus




From sross at connectmail.carleton.ca  Mon Jan  5 20:04:25 2004
From: sross at connectmail.carleton.ca (Sean Ross)
Date: Mon, 5 Jan 2004 20:04:25 -0500
Subject: Integer math question
References: <3987e01c.0401030832.114c6f2a@posting.google.com>
	<11EJb.20461$Vl6.3782481@news20.bellglobal.com>
	<kTEJb.724242$HS4.5376202@attbi_s01>
	<5sFJb.20923$Vl6.3818930@news20.bellglobal.com>
	<UuGJb.21252$Vl6.3847011@news20.bellglobal.com>
	<pan.2004.01.05.17.54.22.894833@yahoo.com>
Message-ID: <GOnKb.4556$k_.547067@news20.bellglobal.com>

"Samuel Walters" <swalters_usenet at yahoo.com> wrote in message
news:pan.2004.01.05.17.54.22.894833 at yahoo.com...
> "If a and b are integers such that b != 0, then there exist unique
> integers r and q such that a = q*b + r and 0 <= r < abs(b)"
>
> For non-mathematical spectators, the divmod() function is defined so that
> q, r = divmod(a, b) by the definition above.

Right. The only thing that was still mildly interesting to me was why does
divmod() return a negative remainder?

>>> a = 5
>>> b = -10
>>> q,r = divmod(a,b)
>>> q
-1
>>> r
-5

If divmod() where defined based on the definition above, then divmod(5, -10)
should return (0, 5).
Well ... that's too strong. The above is a theorem - it doesn't say
remainders have to be nonnegative,
it only says that there exist yada yada yada ... whatever,  I'm not that
interested.





From none at none.com  Tue Jan 20 11:19:24 2004
From: none at none.com (Derek)
Date: Tue, 20 Jan 2004 11:19:24 -0500
Subject: I come not to bury C++, but to praise it...
References: <mailman.337.1074032524.12720.python-list@python.org><bu1uul$cam92$1@ID-46268.news.uni-berlin.de><cu%Mb.47396$8H.99443@attbi_s03><bu3khe$dbm5v$1@ID-46268.news.uni-berlin.de><20040114153516.GA16224@intarweb.us>
	<mailman.448.1074285657.12720.python-list@python.org>
Message-ID: <bujkec$inl4t$1@ID-46268.news.uni-berlin.de>

"Oren Tirosh" wrote:
> A traceback is also much less nasty than deciphering a
> 1000-character long compiler error message reported in
> code that uses a heavily templated library.

Absolutely correct.  But remember that ugly template-related compiler
error messages are a reflection of current compiler technology, not a
fundamental limitation of C++.  I suspect future compilers will make
debugging templates much easier.




From rainerd at eldwood.com  Thu Jan 29 00:04:09 2004
From: rainerd at eldwood.com (Rainer Deyke)
Date: Thu, 29 Jan 2004 05:04:09 GMT
Subject: Rookie question about data types (hashtables)
References: <Xns947EF14E03FAEgeneralsteveperkins@130.133.1.4>
Message-ID: <dv0Sb.135681$sv6.731227@attbi_s52>

Steve D. Perkins wrote:
>     What I would LIKE to have is a hashtable-like structure that lets
> me retrieve multiple values based on a partial key.

Sounds like a sorted list would work best.  A binary search (see the bisect
module) lets find all matches in O(log n) time.


-- 
Rainer Deyke - rainerd at eldwood.com - http://eldwood.com




From M at a.k  Fri Jan  2 15:17:41 2004
From: M at a.k (Midas)
Date: Fri, 02 Jan 2004 20:17:41 GMT
Subject: Passing to a function -- object and method names (or references)
References: <3ff595e2.67831682@news.iprimus.ca>
	<bt4825$235$05$1@news.t-online.com>
Message-ID: <3ff5d14c.83044196@news.iprimus.ca>

Peter Otten wrote:

>You can access attributes with the getattr() builtin.
>
>carGas = getattr(car, "gas")
>
>You can refer to a method either directly 
>
>fun = car.drive 
>fun(123)
>
>or via getattr():
>
>fun = getattr(car, "drive")
>fun(321)
>
>I've modified your example to demonstrate this. 

Thank you very much, Peter! It works nicely!

Midas


From no at spam.invalid  Thu Jan  8 17:00:07 2004
From: no at spam.invalid (Russell E. Owen)
Date: Thu, 08 Jan 2004 14:00:07 -0800
Subject: Tkinter button command curiousity
References: <srdrvv47qvrrb6r26bkuh925phb1lpqkno@4ax.com>
Message-ID: <btkjt8$j1c$1@nntp6.u.washington.edu>

In article <srdrvv47qvrrb6r26bkuh925phb1lpqkno at 4ax.com>,
 mksql at yahoo.com wrote:

>New to Tkinter. Initially, I had some code that was executing button commands 
>at
>creation, rather than waiting for user action. Some research here gave me a
>solution, but I am not sure why the extra step is necessary.
>
>This causes the "graph" function to execute when the button is created:
>	Button(root, text='OK', command=graph(canvas)))
>
>However, this waits until the button is pressed (the desired behavior):
>	def doit():
>	     graph(canvas)
>	Button(root, text='OK', command=doit))
>
>
>Functionally, what is the difference? Why do I need to create a function, to
>call a function, simply to make a button command wait until pressed? Is there 
>a
>better method?

This is a standard issue with callback functions.

Suppose you have a trivial function foo:
def foo(arg1, arg2):
  print "foo(%r, %r)" % (arg1, arg2)

To use foo as a callback function you need to pass it *AS* a function:
  anobj(callback=foo)
and that callback had better include the necessary args. If you try to 
specify args when specifying the callback, you end up passing the RESULT 
of the function (the mistake):
  anobj(callback=foo("bar", "baz")) 
foo gets called just once, when creating an obj, and callback gets set 
to None (the result of calling foo with args "bar" and "baz"). Later 
when anobj wants to call the callback, it has nothing to call!

There are various solutions. The one you chose is excellent. Others 
include:

-Use lambda to avoid creating a named function, but I find this much 
less readable.

- Use a "currying" class; this takes an existing function and 
pre-defined arguments and returns a new function that you use as your 
callback. A good example of such a class is: 
<http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52549>. It's a 
nice thing to have around if you do a lot of callbacks, but otherwise I 
find your solution the most readable.

- If your widget is a class, you may be able to pass your data as class 
instances. This works if there is only one obvious canvas to graph. For 
example:
class mywdg(Tkinter.Frame):
  def __init__(self, master, etc.)
    Tkinter.Frame.__init__(self, master)
    self.canvas = Tkinter.Canvas(self,...)
    self.button = Tkinter.Button(self, command=self.graph)
    ...
  def graph(self):
      # do stuff to self.canvas

- As a more sophisticated variant, if you several canvases to graph, and 
want one button for each, you could make the canvases into objects 
(similar to the example above) and pass the right one to the button, 
e.g.:
  for cnvsobj in listofobj:
    abutton = Tkinter.Button(self, command= cnvsobj.graph)

- Also note that a very few Tkinter functions (such as after) allow you 
to specify a function and additional arguments.

-- Russell


From irmen at -NOSPAM-REMOVETHIS-xs4all.nl  Fri Jan  9 16:08:31 2004
From: irmen at -NOSPAM-REMOVETHIS-xs4all.nl (Irmen de Jong)
Date: Fri, 09 Jan 2004 22:08:31 +0100
Subject: Python is far from a top performer according to benchmark
	test...
In-Reply-To: <ryELb.238$tK2.228@amstwist00>
References: <ryELb.238$tK2.228@amstwist00>
Message-ID: <3fff184f$0$327$e4fe514c@news.xs4all.nl>

Carl wrote:

> "Nine Language Performance Round-up: Benchmarking Math & File I/O"
> http://www.osnews.com/story.php?news_id=5602

This benchmark is beaten to pulp in the discussion about it on slashdot.
It's a real stupid benchmark (as most benchmarks are) IMNSHO.

I mean, using python's arbitrary precision long object for 'math'
and comparing it to the other languages' long /machine types/... come on.
And thats just one of the flaws.

--Irmen


From Kyler at Lairds.com  Wed Jan 21 12:16:54 2004
From: Kyler at Lairds.com (Kyler Laird)
Date: Wed, 21 Jan 2004 12:16:54 -0500
Subject: calling Pyrex results from C
In-Reply-To: <400EA799.7080706@prescod.net>
References: <f7tvd1-a1o.ln1@jowls.lairds.org>
	<20040120172733.GA7666@titan.progiciels-bpi.ca>
	<20040120234855.GV22782@jowls>
	<mailman.560.1074644320.12720.python-list@python.org>
	<o3h2e1-24u.ln1@jowls.lairds.org> <400EA799.7080706@prescod.net>
Message-ID: <20040121171654.GC22782@jowls>

On Wed, Jan 21, 2004 at 08:23:53AM -0800, Paul Prescod wrote:

> First, I'd suggest that "integer" is a perfectly good type in both C and 
> Pyrex so you shouldn't pass around Python objects representing integers.

That would be my inclination too if I just had an integer to pass.
Are you suggesting that I should pass tuples of integers as pointers
to (an array of) integers?

> Second, you aren't checking the return codes of your functions and C has 
> no exception handling, tracebacks, etc. image_size is probably returning 
> 0 because it is probably throwing an exception because you are asking 
> for the size attribute of the Image class rather than the image_PIL object.

I'm trying to keep my examples simple so that it's easy to pick out the
mistakes.

> Once I fix the Image/Image_PIL error your code runs okay on my computer. 

Grrr...yup, that does it.  Dumb mistake - the result of pulling code
out of various places and gluing it together without checks.

>  But you are walking on thin ice and may just be lucky. It is simply 
> not possible to work with strings generated at runtime in C without 
> worrying about memory allocation sometime. In this case I have the 
> strong suspicion that the string() function is either creating and 
> destroying a string object and then returning you a pointer to the dead 
> object's internal memory buffer (bad news!) or simply losing a reference 
> to the (still living) string object: still not a good thing. Eyeballing 
> the code I believe the former is the issue. You could check for sure by 
> adding some printf's to the generated code to look at __pyx_v_s->ob_refcnt.

I feared this was a problem.  I'll play with it.

> Why not let Python do the "print" rather than using "printf".

Printing is not always my final goal.

Thank you.

--kyler




From eurleif at ecritters.biz  Thu Jan 22 19:02:15 2004
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Fri, 23 Jan 2004 00:02:15 GMT
Subject: strtotime?
In-Reply-To: <40105afb$0$319$e4fe514c@news.xs4all.nl>
References: <kvYPb.242$af7.175373@newshog.newsread.com>
	<40105afb$0$319$e4fe514c@news.xs4all.nl>
Message-ID: <bwZPb.244$af7.182636@newshog.newsread.com>

Irmen de Jong wrote:
>> PHP has a very nice strtotime function (http://php.net/strtotime) 
>> which converts a date/time in virtually any format into a timestamp. 
>> Does Python have a similar function?
> 
> I guess you're looking for:  time.strptime

Thanks, but no. PHP's strtotime() function magically guesses the format 
on its own, time.strptime() just uses a fixed format.



From mwilson at the-wire.com  Thu Jan 22 13:05:40 2004
From: mwilson at the-wire.com (Mel Wilson)
Date: Thu, 22 Jan 2004 13:05:40 -0500
Subject: Need help with Python class idioms
References: <f5c5dc88.0401211243.7e81a26b@posting.google.com>
	<200401212101.33605.james@logicalprogression.net>
	<20040121210142.GA27469@mail.theserver.ath.cx>
	<mailman.613.1074720629.12720.python-list@python.org>
Message-ID: <0DBEAls/KrhZ089yn@the-wire.com>

In article <mailman.613.1074720629.12720.python-list at python.org>,
James Henderson <james at logicalprogression.net> wrote:
>On Wednesday 21 January 2004 9:01 pm, Jonathan Daugherty wrote:
>> # P.S. Since you're asking about idiom, it would be more Pythonic to write:
>> #
>> #     if self.mandatoryVar1 is None:
>> #
>> # using the identity test "is" rather than equality test "==", since there
>> is # only one None.
>>
>> I'd write
>>
>>   if not self.mandatoryVar1:
>>
>> but the first method works, too.
>
>Are you sure an empty sequence or zero aren't valid values?  J.

   It can get weird if you have to allow your caller to
optionally specify the value None:


    class _MissingParam:
        "An object that no-one else will have a valid use for."
...
    def a_func (opt1=_MissingParam):
        if opt1 is _MissingParam:
            opt1 = default_calculation ()       # for instance
...


        Regards.        Mel.


From goodger at python.org  Mon Jan  5 09:40:36 2004
From: goodger at python.org (David Goodger)
Date: Mon, 05 Jan 2004 09:40:36 -0500
Subject: prePEP "Decimal data type" v0.2
In-Reply-To: <A128D751272CD411BC9200508BC2194D03383428@escpl.tcp.com.ar>
References: <A128D751272CD411BC9200508BC2194D03383428@escpl.tcp.com.ar>
Message-ID: <3FF97764.9060702@python.org>

Batista, Facundo wrote:
> By the way, which is the extension for a reST document? (I used .txt).

.txt is fine.  Full details in question 2.4 of the FAQ:
http://docutils.sourceforge.net/FAQ.html

-- David Goodger





From skip at pobox.com  Sun Jan 25 13:13:15 2004
From: skip at pobox.com (Skip Montanaro)
Date: Sun, 25 Jan 2004 12:13:15 -0600
Subject: Text Animation
In-Reply-To: <7b454334.0401242038.11404dac@posting.google.com>
References: <7b454334.0401242038.11404dac@posting.google.com>
Message-ID: <16404.1851.997662.600203@montanaro.dyndns.org>


    faizan> Any ideas how these effects can be achieved?

You can start here:

    http://www.musi-cal.com/~skip/python/progress.py

That module provides a couple simple progress counters.

Skip



From guido at python.org  Mon Jan 19 12:50:31 2004
From: guido at python.org (Guido van Rossum)
Date: Mon, 19 Jan 2004 09:50:31 -0800
Subject: PyCon Reminder: Early bird reg deadline 2/1
Message-ID: <200401191750.i0JHoVm23314@c-24-5-183-134.client.comcast.net>

Info
----

This is a reminder that the deadline for early bird registration for
PyCon DC 2004 is February 1, 2004.  Early bird registration is $175;
after that, it will be $200 through March 17, then $250 at the door.
To register, visit:

    http://www.pycon.org/dc2004/register/

Plug
----

PyCon is the most important conference in the year for me.  It brings
together the largest group of Python users and developers imaginable.
I come to PyCon for many reasons: to meet with other core Python
developers face to face; to hear about the exciting things that users
from all over the world are doing with Python; to interact in person
with Python users of all types, from newbies to veterans of many
years; to hear everybody's feedback on where Python is and where
they'd like it to go; and perhaps most of all to continue to encourage
this wonderful community by my presence, words and actions to grow,
reach out to new users of all kinds, and keep listening to each other.

I hope everyone who comes to the conference will return from it with a
new or renewed feeling of excitement about Python, whether they are
developers, sophisticated users, beginners, or even skeptical
passers-by.  The Python community includes everyone, from grade
schoolers just learning about computer science to renowned scientists
interested in using the best tools and business people looking for a
secret weapon.

I'm looking forward to seeing you all at PyCon!

Background
----------

PyCon is a community-oriented conference targeting developers (both those
using Python and those working on the Python project).  It gives you
opportunities to learn about significant advances in the Python
development community, to participate in a programming sprint with some
of the leading minds in the Open Source community, and to meet fellow
developers from around the world.  The organizers work to make the
conference affordable and accessible to all.

DC 2004 will be held March 24-26, 2004 in Washington, D.C.  The keynote
speaker is Mitch Kapor of the Open Source Applications Foundation
(http://www.osafoundation.org/).  There will be a four-day development
sprint before the conference.

We're looking for volunteers to help run PyCon.  If you're interested,
subscribe to http://mail.python.org/mailman/listinfo/pycon-organizers

Don't miss any PyCon announcements!  Subscribe to
http://mail.python.org/mailman/listinfo/pycon-announce

You can discuss PyCon with other interested people by subscribing to
http://mail.python.org/mailman/listinfo/pycon-interest

The central resource for PyCon DC 2004 is
http://www.pycon.org/

--Guido van Rossum (home page: http://www.python.org/~guido/)



From shoot at the.moon  Mon Jan 26 14:54:52 2004
From: shoot at the.moon (Steve Horsley)
Date: Mon, 26 Jan 2004 19:54:52 +0000
Subject: Guardian: open source is a throwback says Jack Schofield
In-Reply-To: <64cff82f.0401251143.328388bd@posting.google.com>
References: <64cff82f.0401251143.328388bd@posting.google.com>
Message-ID: <bv3qu7$msl$1@news.freedom2surf.net>

malcolm wrote:
> Why you can't get something for nothing
> Jack Schofield Jan 22 2004
> 
> 
> "Indeed, the whole progress of commercial computing has been from
> expensive hand-written, bug-ridden, company-specific programs to
> cheaper but more powerful off-the-shelf packages. From that point of
> view, open source is a throwback."

That doesn't ring true to me. This sounds more realistic...


"Indeed, the whole progress of commercial computing has been from
expensive hand-written, bug-ridden, company-specific programs to
cheaper but more powerful off-the-shelf packages. From that point of
view, open source is the next logical advancement.

Steve


From mepython at yahoo.com  Fri Jan  2 16:34:06 2004
From: mepython at yahoo.com (Samir Patel)
Date: Fri, 2 Jan 2004 13:34:06 -0800 (PST)
Subject: Simulation library in Python
Message-ID: <20040102213406.63152.qmail@web41510.mail.yahoo.com>

For last couple of weeks, I was doing lot of research
on various simulation libraries. Only one I find in
python is http://simpy.sourceforge.net. It is very
powerful, but it seems that it does not have any
active development. I am sure there are more than
that. Where are they?

If one wants to create a new simulation program, what
are different packages to use:
simulation event list - priority queue?
simulation model creation (preferable data flow) -
dia, Pyut, OGL
reports - http://reportlab.com
http://docutils.sourceforge.net/
graph -
http://navi.picogui.org/svn/misc/trunk/rtgraph/ 
http://matplotlib.sourceforge.net/
animation - Blender?, VTK, VPython
cad - http://pythoncad.sf.net
GIS - ?
Storage - ZODB
Import/Export - ?

I am interested in creating a professional level
simulation model in Python, so any help regarding this
will be very much appriciated.

__________________________________
Do you Yahoo!?
New Yahoo! Photos - easier uploading and sharing.
http://photos.yahoo.com/



From mtk at qm.com  Tue Jan 13 21:05:20 2004
From: mtk at qm.com (Totte Karlsson)
Date: Tue, 13 Jan 2004 18:05:20 -0800
Subject: Printing to console, no scroll
Message-ID: <bu283s$hnn$1@sea.gmane.org>

Hi,
How can I print to the console without having it scrolling to a new line for
each print statement?
I want to print a count down in the console, but for each count it scrolls
the screen (of course).

 Is there another way?

Here is the simple script for now

print "Closing window in :"
for second in range(10):
    time.sleep(1)
    print `10-second` +" seconds"

thanks
/totte






From ashleylloyd at hotmail.com  Wed Jan  7 09:58:41 2004
From: ashleylloyd at hotmail.com (Ashley Lloyd)
Date: Wed, 07 Jan 2004 14:58:41 +0000
Subject: Newbie: Getting Image From Disk into Buffer
Message-ID: <BAY99-F11mgZJFQQDiK0002ebee@hotmail.com>

I have been trying to get an image into an interbase database (see earlier 
post), and came across a post made on a list some time ago (I ignored it 
earlier as we use kinterbasDB not gvib, but I thought I'd try using it in 
kinterbasDB anyway):

________________________________________________________________
<snip>

I think I can provide some information. I have added a jpg to an interbase
table and have successfuly displayed it in ZOPE.  First off you may know
that Interbase does not store BLOB data directly in a table's blob column.
It stores the data elsewhere and then stores a "pointer" to it in the
table column.  This means that BLOB data MUST be inserted via program code
and thus you cannot do the following in a Zope SQL Method:

insert into the_table (blob_column) values (blob_data)

If you are using the gvibDA you can code an external method to do this:

import gvib
cn = gvib.connect(...)
cr = cn.cursor()
cr.execute('insert into the_table (blob_column values (?)', (blob_data,))
cn.commit()
cr.close()
cn.close()

</snip>
________________________________________________________________

I apologise for my ignorance (newbie, sorry), but can anyone tell me how it 
is that you get the image from disk into blob_data? I have tried several 
ways of opening up the image into a buffer, but it always seems to place 
into the database a string of either the name of the image on disk 
('c:/image.bmp', say), or text such as the following:
<open file 'c:/image.bmp', mode 'rb' at 0x009F06A0>

Once again I apologise for my stupidity (and for making 3 requests today - I 
am trying to figure them out myself, honest!), but if someone could tell me 
how I get the image into blob_data (which I assume is a buffer), I'd be very 
grateful.

TIA

Ashley

_________________________________________________________________
It's fast, it's easy and it's free. Get MSN Messenger today! 
http://www.msn.co.uk/messenger




From mnations at airmail.net  Tue Jan 20 13:55:18 2004
From: mnations at airmail.net (Marc)
Date: 20 Jan 2004 10:55:18 -0800
Subject: Error with Shelve from a frozen application
Message-ID: <4378fa6f.0401201055.384a057d@posting.google.com>

Hello all,

I have searched and experimented but can't find a way to make this
work. I have an application that I froze using py2exe which uses
Shelve to store data for me. This is the error I am getting:

Traceback (most recent call last):
  File "<string>", line 14, in ?
  File "imputil.pyc", line 103, in _import_hook
  File "<string>", line 52, in _import_top_module
  File "imputil.pyc", line 216, in import_top
  File "imputil.pyc", line 271, in _import_one
  File "<string>", line 128, in _process_result
  File "anydbm.pyc", line 62, in ?
ImportError: no dbm clone found; tried ['dbhash', 'gdbm', 'dbm',
'dumbdbm']

A couple of places mentioned forcing the compiler to import the anydbm
module. I've tried this both from within the main program and from the
compiler options. Neither of them worked. Can someone please tell me
how to fix this?

Thanks ahead of time,
Marc


From aahz at pythoncraft.com  Sat Jan 24 11:51:06 2004
From: aahz at pythoncraft.com (Aahz)
Date: 24 Jan 2004 11:51:06 -0500
Subject: Perl vs. Python for text manipulation
References: <69A0D4AB81C51447AD6BA387782B8D64093D8A@midl-mail4.etcconnect.com>
	<871xpp1i8r.fsf@pobox.com> <ou4qulnwy0.fsf@andlx-anamika.cisco.com>
	<buu6j5$12lf$1@nadya.doma>
Message-ID: <buu7pq$i67$1@panix1.panix.com>

In article <buu6j5$12lf$1 at nadya.doma>, Serge Orlov <sombDELETE at pobox.ru> wrote:
>"Ganesan R" <rganesan at myrealbox.com> wrote in message news:ou4qulnwy0.fsf at andlx-anamika.cisco.com...
>> 
>> fileinput is not optimized yet, at least I don't remember any mails
>> about fileinput in python-devel since python 2.3 was released.  I
>> know that it is slow. for line in file: does seem to be optimized
>> though. The last time I ran the tests python was definitely twice as
>> slow (which was before python 2.3 was officially released); now it
>> appears to be only about 40% slower. I need to revisit these crude
>> benchmarks.
>
>Since this problem is not IO bound but rather python internals bound,
>it makes sense to try psyco.

Pysco won't help and might actually make things worse.  At this point,
Perl's speed advantage should come from two and only two sources: Perl
optimizes the snot out of platform I/O (so these speed tests don't apply
to a platform Perl hasn't been ported to), and Perl does not use the
thread-safe forms of I/O.  Python does a fair amount of internal caching
to make up for that, and the file object is already written in C.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

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


From ebolonev at punkass.com  Tue Jan  6 03:00:34 2004
From: ebolonev at punkass.com (Egor Bolonev)
Date: Tue, 6 Jan 2004 18:00:34 +1000
Subject: Downloading files off Interet
References: <c9e6ac92.0401052332.294e2373@posting.google.com>
Message-ID: <btdpvd$63dmh$1@ID-216132.news.uni-berlin.de>

Hello, Blaktyger!
You wrote  on 5 Jan 2004 23:32:53 -0800:

B> I would like to download some mp3 files from a web site. There is to
B> much of them and I had the idea of writing a script to do it for me.

B> Code:
B> import string
B> import urllib

B> f = urllib.urlopen(""" http://www.somemp3site.com/somemp3.com""")

B> fic=open('mp3file.mp3','w')
B> fic.write(f.read())
B> fic.close()
B> f.close()

B> I ran the program and the file is not playing.
B> Can someone help me?
B> Thanks

may be devas esti wb
fic=open('mp3file.mp3','wb')

With best regards, Egor Bolonev.  E-mail: ebolonev at rin.ru


From PeterAbel at gmx.net  Thu Jan  1 15:48:56 2004
From: PeterAbel at gmx.net (Peter Abel)
Date: 1 Jan 2004 12:48:56 -0800
Subject: 'inverting' a dict
References: <3ff1b688$0$319$e4fe514c@news.xs4all.nl>
Message-ID: <21064255.0401011248.6d309292@posting.google.com>

Irmen de Jong <irmen at -NOSPAM-REMOVETHIS-xs4all.nl> wrote in message news:<3ff1b688$0$319$e4fe514c at news.xs4all.nl>...
> Hi
> I have this dict that maps a name to a sequence of other names.
> I want to have it reversed, i.e., map the other names each to
> the key they belong to (yes, the other names are unique and
> they only occur once). Like this:
> 
> { "key1": ("value1", "value2"), "key2": ("value3,) }
> 
> -->
> 
> { "value1": "key1", "value2": "key1", "value3": "key2" }
> 
> What I'm doing is using a nested loop:
> 
> dict2={}
> for (key,value) in dict1.items():
>      for name in value:
>          dict2[name] = key
> 
> which is simple enough, but I'm hearing this little voice in
> the back of my head saying "there's a simpler solution".
> Is there? What is it? ;-)
> 
> Thanks
> --Irmen.

... and after all there is always a hacky one-liner:
>>> org = {"key1": ("value1", "value2"), "key2": ("value3",)}
>>> dict(reduce(lambda l,(k,v):l.extend(zip(v,(k,)*len(v))) or l,org.items(),[]))
{'value3': 'key2', 'value2': 'key1', 'value1': 'key1'}
>>> 

Happy new year
Peter


From enrique.palomo at xgs-spain.com  Wed Jan 21 04:49:31 2004
From: enrique.palomo at xgs-spain.com (Enrique)
Date: Wed, 21 Jan 2004 10:49:31 +0100
Subject: python As400
In-Reply-To: <bujvj4$h5u$2@nemesis.news.tpi.pl>
Message-ID: <001801c3e003$df20ac50$6c010a0a@epalomo>

i checked before this website, http://www.iseriespython.com/, but found no
much information in it (docs)
worse? how much worse? more worse that can be assumed?
and connect python on windows with db2 in as400??

-----Mensaje original-----
De: python-list-bounces+enrique.palomo=xgs-spain.com at python.org
[mailto:python-list-bounces+enrique.palomo=xgs-spain.com at python.org]En
nombre de Jarek Zgoda
Enviado el: martes, 20 de enero de 2004 20:30
Para: python-list at python.org
Asunto: Re: python As400


Enrique <enrique.palomo at xgs-spain.com> pisze:

> I'm very interested in python for AS/400. I must migrate an application
that
> is running under windows to AS/400.
> Has anyone worked with python in that platform??

Yes, with real pleasure. ;)

> what about performace??

Worse than CL/RPG, similar to Java, better than REXX -- in case of batch
jobs. Didn't try running Python scripts interactively.

> The scripts are basicly of string manipulation and i/o.

Check http://www.iseriespython.com/

--
Jarek Zgoda
Unregistered Linux User #-1
http://www.zgoda.biz/ JID:zgoda-a-chrome.pl http://zgoda.jogger.pl/
--
http://mail.python.org/mailman/listinfo/python-list



**AVISO DE CONFIDENCIALIDAD**
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From netquest at sympatico.ca  Tue Jan 27 11:52:50 2004
From: netquest at sympatico.ca (KNS)
Date: Tue, 27 Jan 2004 08:52:50 -0800
Subject: winapi: mouseclick
In-Reply-To: <mailman.838.1075194108.12720.python-list@python.org>
References: <mailman.838.1075194108.12720.python-list@python.org>
Message-ID: <f%tRb.4324$qU3.243424@news20.bellglobal.com>

Thank you for the response.  I am actually using win32all to launch an 
application and am waiting for user actions or changes in state.  Once 
the application is launched (e.g., IE) the program just records changes 
in URLs.  Now I would like the various states (e.g., time, mouse 
position) saved whenever the mouse is clicked on the application (or
even the desktop).  So, can I just use an 'if' (within a while-loop) to 
test whether WM_LBUTTONDOWN == 0 and if so what is the appropriate 
syntax with win32all?

Thanks.


Tim Golden wrote:
>>-----Original Message-----
>>From: KNS [mailto:netquest at sympatico.ca]
>>Sent: 27 January 2004 08:19
>>To: python-list at python.org
>>Subject: Re: winapi: mouseclick
>>
>>
>>
>>Just to add some clarification, this is in fact a Python question.
>>I'm just working within the Windows environment.  And, now that
>>I'm here, I'm certain this is child's play for many of you, so
>>a bit of help would be most welcomed.
>>
>>Thanks.
>>
>>KNS wrote:
>>
>>>Hello,
>>>
>>>Can someone please suggest how to test for a mouse click using
>>>the WinAPI?  I have dispatched a windows application and would
>>>like to detect any mouseclicks (and keyboard entry for that 
>>
>>matter)...
>>
>>>Thanks.
>>>
>>
> 
> <sigh>
> Your question is not the most precise one I've ever seen. If
> you have written a Windows app then you presumably understand
> how the Windows messaging setup works. In which case, what
> you need to do is to handle WM_LBUTTONDOWN and related messages. 
> 
> If you're not sure which messages to go for, look at this:
> 
> http://msdn.microsoft.com/library/en-us/winui/winui/windowsuserinterface/use
> rinput.asp
> 
> which gives an overview.
> 
> There's an example of doing this kind of thing in Python
> using the ctypes modules:
> 
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/208699
> 
> You can also do it with the win32all extensions from Mark
> Hammonds pages:
> 
> http://starship.python.net/crew/mhammond/win32/Downloads.html
> 
> If this isn't really what you were asking, could you post a
> segment of code showing what you're about and where you're
> stuck?
> 
> TJG
> 
> 
> ________________________________________________________________________
> This e-mail has been scanned for all viruses by Star Internet. The
> service is powered by MessageLabs. For more information on a proactive
> anti-virus service working around the clock, around the globe, visit:
> http://www.star.net.uk
> ________________________________________________________________________
> 



From CousinStanley at hotmail.com  Thu Jan 15 12:38:36 2004
From: CousinStanley at hotmail.com (Cousin Stanley)
Date: Thu, 15 Jan 2004 10:38:36 -0700
Subject: [ANNOUNCE] gtkmvc-0.9.0
References: <mailman.391.1074169414.12720.python-list@python.org>
Message-ID: <bu6j3j$ec2sf$1@ID-130333.news.uni-berlin.de>

| MVC Framework for Pygtk2 version 0.9.0 has been released
| ....

Roberto .... 

    Thanks for providing a very nice MVC example ....

        http://sra.itc.it/people/cavada/mvc/index.html
        Python MVC gtkmvc

    I've had your original version for a few months
    with the intent to try and adapt a graphics application 
    that I've written to the MVC pattern and hopefully the new version 
    you've provided will inspire me to go ahead and do it .... 

    My application currently is written using the Tkinter GUI,
    but conversion using PyGTK and your examples should be straightforward ....

    Following are a few links I've collected, not all Python based,
    that may be useful to anyone else interested in MVC ....

http://www.faqts.com/knowledge_base/view.phtml/aid/3171/fid/245
Python MVC GladeBase.py

http://twistedmatrix.com/documents/TwistedDocs/TwistedDocs-1.0.0/howto/woven.html
Python MVC Twisted 

http://webware.colorstudy.com/twiki/bin/view/Webware/ModelViewController
Python MVC WebWare

http://st-www.cs.uiuc.edu/users/smarch/st-docs/mvc.html
SmallTalk MVC

http://www.owlnet.rice.edu/~comp212/01-spring/labs/05/
Java MVC Rice University

http://www.chinajavaworld.net/examples/application/mvc.html
Java MVC ChinaJavaWorld

http://www.cs.indiana.edu/~rawlins/symphony/mvc2/mvc2-proposal.html
Java MVC Refactoring

-- 
Cousin Stanley
Human Being
Phoenix, Arizona



From paul at boddie.net  Wed Jan 14 05:23:53 2004
From: paul at boddie.net (Paul Boddie)
Date: 14 Jan 2004 02:23:53 -0800
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
	<K_YMb.10994$9k7.204413@news.xtra.co.nz>
	<bu1qq3$cu440$1@ID-207230.news.uni-berlin.de>
	<n22Nb.11299$9k7.210522@news.xtra.co.nz>
	<bu2pgs$d123a$1@ID-207230.news.uni-berlin.de>
	<4004EC9E.1E2E2893@alcyone.com>
Message-ID: <23891c90.0401140223.344b22af@posting.google.com>

Erik Max Francis <max at alcyone.com> wrote in message news:<4004EC9E.1E2E2893 at alcyone.com>...
> 
> There are plenty of things you can get out of starting, getting involved
> with, and approaching open source projects.  A legion of personal
> servants is not going to be one of them, and only a crass idiot would
> think otherwise.

As far as I've been able to discover, life is just one long cocktail
party in Brandon's honour. So it isn't exactly surprising that
everyone appears to him as just another waiter with a tray of drinks.

Paul


From anand at easi.soft.net  Wed Jan 21 07:32:49 2004
From: anand at easi.soft.net (Anand K Rayudu)
Date: Wed, 21 Jan 2004 18:02:49 +0530
Subject: invoking interpeter in another interpeter
Message-ID: <400E7171.6060702@easi.soft.net>

Hi

I have extended/embedded python into my application, it is working 
great, The documentation is too good,
I could replace existing scripting tool to python in no time.


I have one problem with invoking python interpreter from another python 
interpreter.
This is how it is.

I have one C API which executes python interpreter passing the file name,
So there are chances that in that file one command it self is the API to 
execute python.
It is hanging in the second invocation, could some one help.

Thanks in advance
Anand


-------------------------------------------------------------------
Python code:

First python file

from Vdb import *
# This is the invocation of another python interpeter from one
ExecutePythonInterpeter("another.py"  )


The application first calls the ExecutePythonInterpter C API, which in 
turn calls same API for different file,
from python,

Following is the C implementation of ExecutePythonInterpeter.

void ExecutePythonInterpeter(
                char            *file
                )
{
    FILE        *fp;
    char        *msg ;
    PyObject    *exc, *val, *trb, *obj ;
    PyThreadState       *gtstate = NULL;

    if( Py_IsInitialized() == FALSE)
    {
       Py_Initialize();
       PyEval_InitThreads();
       gtstate = PyEval_SaveThread();
    }
    ExecutePythonInterpeterThread(file);
    if(gtstate)
    {
        PyEval_AcquireThread(gtstate);
        Py_Finalize();
        gtstate=NULL;
    }
    return ;
}

void ExecutePythonInterpeterThread(
                char            *file
                )
{
    FILE        *fp;
    char        file_name[256]  ;
    PyThreadState       *tstate ;
    PyEval_AcquireLock();
    tstate = Py_NewInterpreter();
    initVdb();
    initVdbPythonVgPoint2() ;
    initVdbPythonVgPoint3();
    if(tstate == NULL) {
        fprintf(stderr, "Can't create an interpreter\n");
        return ;
    }
    sprintf(file_name,"%s",file);
    fp=fopen(file_name,"r");
    if(!fp)
    {
       fprintf(stderr,"FATAL:File open for %s failed\n",file);
       return ;
    }
    PyRun_SimpleFile(fp,file_name) ;
    Py_EndInterpreter(tstate);
    PyEval_ReleaseLock();
    fclose(fp);
    return ;
}





From LittleDanEhren at yahoo.com  Tue Jan  6 21:05:10 2004
From: LittleDanEhren at yahoo.com (Daniel Ehrenberg)
Date: 6 Jan 2004 18:05:10 -0800
Subject: Pre-PEP: Dynamically evaluating default function arguments
References: <711c7390.0401061452.3ee3789f@posting.google.com>
Message-ID: <711c7390.0401061805.70d0944f@posting.google.com>

I'm sorry I wasted your time, everyone.


From cartermark46 at ukmail.com  Tue Jan 20 12:03:07 2004
From: cartermark46 at ukmail.com (Mark Carter)
Date: 20 Jan 2004 09:03:07 -0800
Subject: Python-based file synchronizer (like Unison)?
References: <ua2ud1-evk.ln1@jowls.lairds.org>
Message-ID: <d3c9c04.0401200903.396c4be2@posting.google.com>

> Anyone know of anything like this?  It doesn't seem like it
> should take a lot to sit on top of rsync and resolve conflicts.

You might also consider dfp (but it has no GUI):
http://www.homepages.lu/pu/dfp.html


From gagenellina at softlab.com.ar  Mon Jan 19 22:51:23 2004
From: gagenellina at softlab.com.ar (Gabriel Genellina)
Date: Tue, 20 Jan 2004 00:51:23 -0300
Subject: Launching Wordpad on Windows
In-Reply-To: <buhtvp$l0j$1@news.Stanford.EDU>
Message-ID: <5.2.1.1.0.20040120004513.024a7910@192.168.0.115>

At 20/1/2004 00:50, you wrote:

>item = "SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\App Paths\\WORDPAD.EXE"
>key = win32api.RegOpenKey(win32con.HKEY_LOCAL_MACHINE, item, 0,
>                           win32con.KEY_QUERY_VALUE)
>info = win32api.RegQueryValueEx(key, None)
>win32api.RegCloseKey(key)
>editor = win32api.ExpandEnvironmentStrings(info[0])
>
>I would like to solicit learned opinions about this.  Which
>version will work in more versions of Windows?  Is there a
>better approach?

I think this is the best way. Untested, but that should work even on Windows95.
Anyway, you could provide a default (simply WORDPAD.EXE), just in case the 
application exists and is in the path but is not registered.


Gabriel Genellina
Softlab SRL




From mesteve_b at hotmail.com  Sat Jan  3 17:20:59 2004
From: mesteve_b at hotmail.com (python newbie)
Date: Sat, 03 Jan 2004 22:20:59 GMT
Subject: Lists are weird when they are instance members
Message-ID: <ffHJb.5475$HL3.4277@newssvr29.news.prodigy.com>

hey,
 okay, I'm trying to figure out why my books: Quick Python, Python in a
Nutshell, Python Cookbook and Learning Python don't say anything about the
weird behavior of a list when you have one as an object instance member.

for instance (my first pun of 2004), if I have,

test.py
----------------

 global_filegroup_array = []  # array of filegroup objects

 class FileGroup:
       a = 0
       mylist = []      # here it is

       def  put_stuff_in_my_list(self, anyfile):
              self.mylist.append( get just a single string from file)   #
pls excuse the psuedo

       def __init__(self):
            put_stuff_in_my_list(anyfile)

def main():                         #     do ten times:  instantiate the
above object, and add to the global array
     for i in xrange(10):
          filegroup = FileGroup()
          global_filegroup_array.append(filegroup)


   # print the list contents
    print global_filegroup_array[0].mylist

------------ end of file

  Output is:    [u'.string1', u'.string2', u'.string3' ]      # only
u'string1' should show up

   No matter which index I use into the global array, I always get ALL of
the strings
   showing up. I should only get  u'string1' showing up,   and u'string2'
if
   I used  "[1].mylist"


How I resolved it, is by slipping in

             self.mylist = []

   before

      put_stuff_in_my_list(anyfile)

 in   __init__(self)

Why should I have to empty out the list when it's a member of a newly
instantiated object?

thanks

p.s.    ( I'm actually not doing exactly the thing with the
             files,  but instead iterating through a xml file with dom,
            debugging it showed the behavior )










From serve at detongiser.com  Thu Jan 15 14:38:56 2004
From: serve at detongiser.com (Servé Lau)
Date: Thu, 15 Jan 2004 20:38:56 +0100
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
	<K_YMb.10994$9k7.204413@news.xtra.co.nz>
	<bu1qq3$cu440$1@ID-207230.news.uni-berlin.de>
	<n22Nb.11299$9k7.210522@news.xtra.co.nz>
	<bu2pgs$d123a$1@ID-207230.news.uni-berlin.de>
	<4004EC9E.1E2E2893@alcyone.com>
	<23891c90.0401140223.344b22af@posting.google.com>
	<100bbb6kj9m03a4@corp.supernews.com>
	<bu4cdk$cv09p$1@ID-207230.news.uni-berlin.de>
Message-ID: <100dr2bonj4t2ed@corp.supernews.com>

"Brandon J. Van Every" <try_vanevery_at_mycompanyname at yahoo.com> wrote in
message news:bu4cdk$cv09p$1 at ID-207230.news.uni-berlin.de...
> Except that I didn't say that, so it wouldn't be within your legal rights
to
> quote me as having said such.  If you want to quote me, you're going to
have
> to *quote* me, not paraphrase me in your own idiom.

aha,

> Why do you think OS developers owe you any kind of value at all?
"I don't.  But that's not going to stop me from denigrating them for being
incapable of fulfillng the kinds of projects I have in mind."




From gsmith at oxfam.org.uk  Thu Jan 29 11:43:11 2004
From: gsmith at oxfam.org.uk (Graham)
Date: Thu, 29 Jan 2004 16:43:11 -0000
Subject: Pythonwin - breaking out of infinite loop
Message-ID: <40193737$0$13350$ed9e5944@reading.news.pipex.net>

How do I stop a Python program running in PythinWin?  I would expect to be
able to use CTR-C or CTRL-break etc.

many thanks

Graham Smith

PeopleSoft Technical Team Leader
OXFAM GB
+44 (1865) 313255
gsmith at oxfam.org.uk




From francisgavila at yahoo.com  Mon Jan 12 21:23:20 2004
From: francisgavila at yahoo.com (Francis Avila)
Date: Mon, 12 Jan 2004 21:23:20 -0500
Subject: how can I execute a function string
References: <pan.2004.01.13.01.17.27.878470.10201@presidency.com>
Message-ID: <1006qgl89mmsnf4@corp.supernews.com>

Rajarshi Guha wrote in message ...
>Hi ,
> I have some code that generates a function on the fly in a string.
>At a later point in time I want to execute this function (which also
>requires a parameters to be passed to it). So the code is something like
>this:
>
>def generate_func():
> s = """ def function(x):
> print x
> return 2
>"""
> return s
>
>funcstring = generate_func()
>retval = ....
>
>That is, retval should have the value returned from the evaluation of the
>function in the string funcstring.
>
>Is this possible by means of simple function calls or does this involve
>some sort of black magic?
>
>Thanks,

What is it with code-generation this week?

Anyway, the exec statement (not function) will execute the contents of a
string or code object as though it were inline code:

E.g.:
>>> x
Traceback (most recent call last):
...
NameError: name 'x' is not defined
>>> exec 'x = 1'
>>> x
1
>>>

Use like so:

exec generate_func()
# 'function' is now in your namespace.
function('hello') # should print 'hello' and return 2.

A *slightly* better approach is to make a code object, using compile().

def gen_func():
    s = '''
    def f(x):
        return x
    '''
    return compile(s, '<source>', 'single')

exec gen_func() # f gets dumped into your namespace.

If you're very ambitious, you can generate an AST tree and compile that: see
the compile module.  In this simple case there's no advantage, however.

I'll have to think about how to turn the raw source of a function definition
into a callable.  I'm not sure it's possible in a 100% reliable manner.
Here's a first attempt (untested):

def makecallable(source):
    """Return a function from string source.

    'def <funcname>' must be the first tokens in source!

    """
    co = compile(source, '<makecallable()>', 'single')
    funcname = co.co_varnames[0] #This is VERY brittle!!
    fakelocals = {}
    exec co in globals(), fakelocals
    return fakelocals[funcname]

Now that I've told you about exec, I'll tell you that you almost certainly
shouldn't be using it.  There is most likely a better way to do what you're
doing than building code strings and executing them.  Python has a lot of
reflection, introspection, and dynamic object generation capabilities, which
generally remove the need for using exec, which is slow, hackish, and
error-prone.  Please tell us more about what you're doing.
--
Francis Avila



From cookedm+news at physics.mcmaster.ca  Tue Jan 27 18:44:20 2004
From: cookedm+news at physics.mcmaster.ca (David M. Cooke)
Date: Tue, 27 Jan 2004 18:44:20 -0500
Subject: map float string '0.0' puzzle
References: <bv6ovb$c2q$1@boulder.noaa.gov>
Message-ID: <qnkn089hs8b.fsf@arbutus.physics.mcmaster.ca>

At some point, "j vickroy" <jim.vickroy at noaa.gov> wrote:

> Howdy,
>
> I do not understand the following behavior for:
> PythonWin 2.3.2 (#49, Oct  2 2003, 20:02:00) [MSC v.1200 32 bit (Intel)] on
> win32.
>
>>>>
>>>> float('0.0')
> 0.0
>>>> row = ('0.0', '1.0', None)
>>>> map(lambda setting: setting and float(setting) or None, row)
> [None, 1.0, None]
>>>> map(lambda setting: setting and (setting,float(setting)) or
> (setting,None), row)
> [('0.0', 0.0), ('1.0', 1.0), (None, None)]
>>>>
>
> Specifically, why is the return value of the first map operation:
> [None, 1.0, None]
>
> I was expecting:
> [0.0, 1.0, None]

Because float('0.0') is a false value -- 0.0 is taken as false. So 
the lambda becomes
'0.0' and 0.0 or None
which evaluates to None.

It looks like you're trying to use the 'conditional expression' trick,
which fails in these situations. It'd be clearer to be more
expressive, and define a function:

>>> def float_to_str(s):
...     if s:
...         return float(s)
...     else:
...         return None
...
>>> [ float_to_str(s) for s in row ]
[0.0, 1.0, None]

where I've used a list comprehension instead of map. In fact, I'd
probably define float_to_str like this:
def float_to_str(s):
    try:
        return float(s)
    except:
        return None

which now works for anything: if it's convertible to float, it returns
the float, otherwise None.

-- 
|>|\/|<
/--------------------------------------------------------------------------\
|David M. Cooke
|cookedm(at)physics(dot)mcmaster(dot)ca


From nico-NoSp at m-tekNico.net  Mon Jan  5 04:01:10 2004
From: nico-NoSp at m-tekNico.net (Nicola Larosa)
Date: Mon, 05 Jan 2004 10:01:10 +0100
Subject: Python for Embedded Devices?
In-Reply-To: <4f0a9fdb.0401042307.1f6bd4e8@posting.google.com>
References: <efa6f675.0401021920.3bffced0@posting.google.com>
	<vvdl0nbogvm74@corp.supernews.com>
	<221e7b06.0401041537.2896b22d@posting.google.com>
	<4f0a9fdb.0401042307.1f6bd4e8@posting.google.com>
Message-ID: <btb918$f61$1@newsreader.mailgate.org>

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

>> I have been tinkering around with some ideas to make a new language to
>> fit the environment I deal with. This is slow work, as I haven't a lot
>> of time to spend on it, and I am not a language design expert, but I'm
>> having fun with it!

> Maybe you can work with Fredrik Lundh on Pytte
(http://effbot.org/zone/pytte.htm)

Thanks for this link. There's nothing to download there, unfortunately. :^(

Something else that's interesting for embedded devices is an environment for
working in Python and generating the RTOS:

"WhatOS is a free open source embedded system development solution. It
provides a complete set of tools for creating high-quality, reliable embedded
systems. These include: a real-time operating system (RTOS) generator, a
simulator for testing and debugging generated systems, and tools for
interacting with systems remotely after they have been embedded."

http://www.sticlete.com/whatos/index.html


- --
Nicola Larosa - nico-NoSp at m-tekNico.net

"I am afraid that if the United States had to live by the [monetary]
rules that are imposed on, say, Brazil, the USA would become a
developing country in one generation. It's the system that is
currently unstable, unfair and not working." -- Bernard Lietaer

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.3 (GNU/Linux)

iD8DBQE/+SfUXv0hgDImBm4RAkkxAKCgi/prJnHbYv4BtiJwK/0g/KB3SQCfeyFR
y5tG2razumSaRYG5cyVe7Y4=
=a8cP
-----END PGP SIGNATURE-----


From ny_r_marquez at yahoo.com  Tue Jan 20 16:04:11 2004
From: ny_r_marquez at yahoo.com (R.Marquez)
Date: 20 Jan 2004 13:04:11 -0800
Subject: py2exe 0.5.0 (finally) released
References: <y8s7aeps.fsf@python.net>
Message-ID: <8a27e309.0401201304.7ee860b0@posting.google.com>

Maybe I'm missing it, but I don't see how to specify an icon to use
for the exe.  Is that funtionality no longer available?

-Ruben


From majordomo-owner at csl.sri.com  Sat Jan 31 14:31:57 2004
From: majordomo-owner at csl.sri.com (majordomo-owner at csl.sri.com)
Date: Sat, 31 Jan 2004 11:31:57 -0800
Subject: Majordomo results: Hi
Message-ID: <200401311931.i0VJVvaV000964@quarter.csl.sri.com>

An embedded and charset-unspecified text was scrubbed...
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From carroll at tjc.com  Tue Jan  6 05:13:26 2004
From: carroll at tjc.com (Terry Carroll)
Date: Tue, 06 Jan 2004 10:13:26 GMT
Subject: Downloading files off Interet
References: <c9e6ac92.0401052332.294e2373@posting.google.com>
Message-ID: <q02lvv8mr2btomp0e56l64c9cq14qeodcg@4ax.com>

On 5 Jan 2004 23:32:53 -0800, blaktyger at hotmail.com (Blaktyger) wrote:

>I would like to download some mp3 files from a web site. There is to
>much of them and I had the idea of writing a script to do it for me.
>
>Code:
>import string
>import urllib
>
>f = urllib.urlopen(""" http://www.somemp3site.com/somemp3.com""")
>
>fic=open('mp3file.mp3','w')
>fic.write(f.read())
>fic.close()
>f.close()
>
>I ran the program and the file is not playing.
>Can someone help me?


A couple possibilities:

First, are you running on Windows?  If so, you want your output file
opened binary:

 fic=open('mp3file.mp3','wb')

Second, what does your output file look like?  See if it's a text error
message.  Some sites will check to see whether there is a referring page
from their own web site, and disallow transfer otherwise (or divert to a
different site).  If your somemp3site.com site does that, your download
will fail.

The only way I know around this is to give up using urllib, and use
urllib2 instead, opening a Request rather than the url directly, and
specifying the referring page from which you picked up the URL to the MP3
page.

I can give more detail on this, but check the binary open first.

Also, if the referring page is not the issue, you will probably find it
much simpler to use urlretrieve instead.  See
http://www.python.org/doc/current/lib/module-urllib.html .

Instead of:

 import string
 import urllib
 f = urllib.urlopen(""" http://www.somemp3site.com/somemp3.com""")
 fic=open('mp3file.mp3','w')
 fic.write(f.read())
 fic.close()
 f.close()

You just do:

 import urllib
 urllib.urlretrieve(""" http://www.somemp3site.com/somemp3.com""")

That's it.  It's almost cheating.

Unfortunately, there's no urllib2.urlretrieve, so if that referring page
thing is your issue, you can't use urlretrieve.

Hope this helps.


From oliver.schoenborn at utoronto.ca  Mon Jan 26 10:39:13 2004
From: oliver.schoenborn at utoronto.ca (Humpty Dumpty)
Date: Mon, 26 Jan 2004 09:39:13 CST
Subject: collaborate on open source project
Message-ID: <brv2ud$i4c$1@nrc-news.nrc.ca>

Hello, I'm looking for someone interested in participating in a small
open-source project that requires processing cgi using python. If you know
(or are learning) python and cgi and would like to know more, send me an
email. The project is at http://www.sf.net/projects/bbmg. Thanks,
Oliver


-- 
PLEASE NOTE: comp.infosystems.www.authoring.cgi is a
SELF-MODERATED newsgroup. aa.net and boutell.com are
NOT the originators of the articles and are NOT responsible
for their content.

HOW TO POST to comp.infosystems.www.authoring.cgi:
http://www.thinkspot.net/ciwac/howtopost.html



From miki.tebeka at zoran.com  Sun Jan 18 16:56:53 2004
From: miki.tebeka at zoran.com (Miki Tebeka)
Date: 18 Jan 2004 13:56:53 -0800
Subject: Where to post an article?
Message-ID: <4f0a9fdb.0401181356.79a1ec87@posting.google.com>

Hello All,

I have a little article I'd like to publish.
It's about how to use Python to repidly develop an assembler (2.5 days in my case).

Can you recommend a site/paper to publish it?

And yes, I have a web page...

Thanks.
Miki


From danb_83 at yahoo.com  Fri Jan 23 14:42:28 2004
From: danb_83 at yahoo.com (Dan Bishop)
Date: 23 Jan 2004 11:42:28 -0800
Subject: What is object()
References: <mailman.655.1074790103.12720.python-list@python.org>	<bup01m$hjm$1@panix1.panix.com>	<10105gchtsl1a21@news.supernews.com>	<bupgfm$h1a$1@panix2.panix.com>
	<mailman.685.1074860576.12720.python-list@python.org>
Message-ID: <ad052e5c.0401231142.45b748c1@posting.google.com>

Gerrit Holl <gerrit at nl.linux.org> wrote in message news:<mailman.685.1074860576.12720.python-list at python.org>...
> Aahz wrote:
> > >Unless, of course, you're using the __new__() method.
> > 
> > "Not much" != "none"  ;-)
> 
> "Not much" >= "none" ;-)
> Because none is not much ;-)

No, "Not much" < "none", because the comparison is case-sensitive. 
However, it is True that "not much" >= "none" and "Not much" >= None
;-)


From newsgroups at jhrothjr.com  Thu Jan 29 16:32:10 2004
From: newsgroups at jhrothjr.com (John Roth)
Date: Thu, 29 Jan 2004 16:32:10 -0500
Subject: Python vs. Io
References: <711c7390.0401291301.3f95794@posting.google.com>
Message-ID: <101iv0ri062ag22@news.supernews.com>


"Daniel Ehrenberg" <LittleDanEhren at yahoo.com> wrote in message
news:711c7390.0401291301.3f95794 at posting.google.com...

> Can anyone show me how to so much as alias "for" to "each" in Python

Without getting into the language wars, I think what you're looking
for is called the Visitor Pattern (Design Patterns: GOF). It's actually
trivial to implement as long as you're not looking for built-in support.

Something like this works quite well in any object where you want
to implement a visitor over a collection:

class aCollection:
    def visit(self, instance):
        for x in self._collection:
            instance.visitor(x)
        return instance.result()

The final call is a little more than the bare visitor pattern, but it
allows the visitor instance to pass back a result so you can use
it in expressions.

A visitor then looks like this:

class fubar:
    def __init__(self):
        self.whatever = 0
    def visitor(self, value):
        self.whatever += value
    def result(self):
        return self.whatever

and you use it like this:

ohWow = aCollection.visit(fubar())

Unlike a block in, for example, Ruby, a visitor instance
can be pre-initialized, it can have multiple methods and
it can persist after being passed against the collection.

Of course, you can use more complex data structures as well,
see the compiler stuff for examples of the visitor pattern used
over the Python Abstract Syntax Tree.

The visitor pattern is also very useful for file system
navigation; I use it consistently.

John Roth

>
> Daniel Ehrenberg




From benjamin at araisoft.com  Fri Jan  2 19:35:49 2004
From: benjamin at araisoft.com (benjamin at araisoft.com)
Date: Fri, 2 Jan 2004 16:35:49 -0800 (PST)
Subject: Python 2.3.3 compilation problem
In-Reply-To: <DWnJb.1946$Dp5.838@fe3.columbus.rr.com>
References: <fba51ba7.0401012310.599d626d@posting.google.com> 
	<DWnJb.1946$Dp5.838@fe3.columbus.rr.com>
Message-ID: <21307.66.47.55.3.1073090149.squirrel@email.araisoft.com>

There may be a conflict with the lib's directory with a previous
installation of Python 2.3 already installed.  For the configure try
running:

./configure --prefix=/usr/local instead of ./configure

> Zdenda wrote:
>
>> Hi, i have RH9 and i need python 2.3. I executed tgz file and typed
>> ./configue. Then i type make. It is without problem. When I type make
>> install ... ...
>> ...
>> Compiling /usr/local/lib/python2.3/xml/sax/handler.py ...
>> Compiling /usr/local/lib/python2.3/xml/sax/saxutils.py ...
>> Compiling /usr/local/lib/python2.3/xml/sax/xmlreader.py ...
>> Compiling /usr/local/lib/python2.3/xmllib.py ...
>> Compiling /usr/local/lib/python2.3/xmlrpclib.py ...
>> Compiling /usr/local/lib/python2.3/zipfile.py ...
>> make: *** [libinstall] Error 1
>>
>> Have somebody any idea where is error?
>> Thanks
> I had the same problem on Mandrake.  There seem to be some minor syntax
> incompatibilities in zipfile.py, and others.  Try make -i install, and all
> should be fine.
>
> Mike
> --
> http://mail.python.org/mailman/listinfo/python-list
>




From jepler at unpythonic.net  Tue Jan  6 18:33:31 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Tue, 6 Jan 2004 17:33:31 -0600
Subject: Pre-PEP: Dynamically evaluating default function arguments
In-Reply-To: <711c7390.0401061452.3ee3789f@posting.google.com>
References: <711c7390.0401061452.3ee3789f@posting.google.com>
Message-ID: <20040106233331.GA15852@unpythonic.net>

That proposal gets "-All" from me. (or, at least, I think that's what I
mean.  Maybe I just mean "None", I couldn't stand that other thread)

Reams of code depend on default arguments working as they do today.  For
instance:
    l = []
    for i in range(10):
        l.append(lambda x, y=i: x+y)
or
    def fib(x, y={0: 1, 1: 1}):
        assert x >= 0
        if not y.has_key(x):
            y[x] = fib(x-1) + fib(x-2)
        return y[x]
or
    def stack():
	def push(x, l=[]):
		l.append(x)
	def pop(l=push.func_defaults[0]):
		return l.pop()
	return push, pop

It's not clear exactly how this feature would work.  What additional
state will you store with function objects to make it work?  Right now,
it works like this:
    def f(l=x):
        pass
is equivalent to
    _magic = x
    def f(*args):
        assert len(args) < 2
        if args: l = args[0]
        else: l = _magic
you're proposing something more like
    _magic = lambda: x
    def f(*args):
        assert len(args) < 2
        if args: l = args[0]
        else: l = _magic()
you've just added one additional function call overhead for each
defaulted argument, plus the time to evaluate the expression 'x', even
in cases where it makes no difference.  Here's a case where the
programmer has performed a micro-optimization that will probably be
slower after your change (even though the program's meaning is not
changed):
    def log10(x, l=math.log, l10=math.log(10)):
        return l(x)/l10

That leaves the case where you actually want the default argument value
to depend on the current program's state, as below:
    def log(s, when=time.time()):
        print >>stderr, time.asctime(when), s
I think it's better to write
    def log(s, when=None):
        if when is None: when = time.time()
        print >>stderr, time.asctime(when), s
because it makes calling code easier, too:
    def log_with_prefix(p, s, when=None):
        log("%s: %s" % (p, s), when)
instead of repeating the default argument everwhere you may call it both ways
    def log_with_prefix(p, s, when=time.time()):
        log("%s: %s" % (p, s), when)
or having to test at each place you call:
    def log_with_prefix(p, s, when=None):
        if when is None:
            log("%s: %s" % (p, s))
        else:
            log("%s: %s" % (p, s), when)

Jeff



From danieljng at yahoo.com  Wed Jan  7 00:32:40 2004
From: danieljng at yahoo.com (Daniel)
Date: 6 Jan 2004 21:32:40 -0800
Subject: compileall binaries don't run!?
Message-ID: <798d4337.0401062132.1e82ee65@posting.google.com>

Hi,

I'm trying to use compileall to make pyc files from py files (without
having to execute them at the same time).

This is the first time I've used compileall, so maybe I've done
something silly.

I run it like this:

python /usr/lib/python2.2/compileall.py /home/me/mySourceDir

And the output looks fine, resulting in a bunch of pyc files.

Then I try running the pyc file eg.:

/home/me/mySourceDir/doodad.pyc

But get the following error:
bash: ./doodad.pyc: cannot execute binary file

I notice that when I execute doodad.py, no pyc file is generated. Does
this mean that Python can only make pyc files from some BUT NOT ALL py
files? Is this my problem?

I've ensured file access permissions are correct.

Thanks,
Dan.


From ramen at lackingtalent.com  Fri Jan  9 18:11:36 2004
From: ramen at lackingtalent.com (Dave Benjamin)
Date: Fri, 09 Jan 2004 23:11:36 -0000
Subject: Python and Jython are kinda different
References: <slrnbvsi8v.78r.ramen@lackingtalent.com> <87wu81jjg2.fsf@pobox.com>
	<slrnbvtlos.h2e.ramen@lackingtalent.com> <8765fkrig3.fsf@pobox.com>
Message-ID: <slrnbvudpe.1qc.ramen@lackingtalent.com>

In article <8765fkrig3.fsf at pobox.com>, John J. Lee wrote:
> Yes, but it has been specifically noted by GvR (as well as the
> Jythonistas) that Jython is lacking developers ATM.

I see.

>> represented in books and tutorials--just two implementations of the Python
>> language, we all ought to be more concerned with unifying them. I never see
>> Jython advertised as a limited subset of Python.
> 
> Well, it's *not* a limited subset of CPython 2.1 (apart from tiny
> differences).

True. I suppose this brings up the following question: What *is* "Python"?
Does the concept of Python *today* fit within Jython's feature set? I'd say
much of it does, but a few things stick out, in order of decreasing
importance (IMHO):

 - generators
 - properties
 - getattr/getitem behavior (which is even different from CPython 2.1)
 - type factories being classes
 - dictionary support for "in" keyword

When I think of the Python language, as it stands today, I am tempted to
include all of the above.

I recently ported Python 2.3's "sets" module. I posted a patch here
recently, although I've improved it somewhat and fixed a few bugs 
since then. The lack of an "itertools" module was perhaps my biggest
obstacle (the "for key in adict" feature was another common one). Now, I
suppose I could have tried to port "itertools", but there's no "yield", so
how do I do that? I ended up just using the old map and filter functions,
which means all of that code is back to the old Python memory efficiency.

>> > PyPy is a research effort, so not immediately useful.  It may have big
>> > payoffs if successful, of course.
>> 
>> Well, my thinking is that, since it's an implementation of Python written in
>> Python, many of the new features of CPython that don't require syntactical
>> or fundamental object-model changes could be ported from PyPy to Jython as a
>> temporary fix, to be eventually recoded in Java.
> 
> Library changes don't require PyPy, they already work (most of the
> time) direct from CPython.  It's the fundamentals that take the work.
> I'm not sure whether there's a third category, as you suggest.

Sometimes they do, sometimes they don't. But the list of things that you
can't do in library code if you want to be compatible with Jython 2.1 is
growing. For instance, the "str.join" trick that has been discussed recently
won't work in Jython 2.1 since "str" is not a class. It's a minor thing, but
I bet a lot of people aren't aware of that. Little things like that can add
up.

I've never looked at the code to PyPy, so this is purely speculative, but it
seems like at least a plausible idea to provide an extension mechanism for
Jython such that PyPy code can be incorporated. Imagine if you could add the
"yield" keyword by just importing a pure-Python module. I suppose we'd be
entering macro-like territory, so it'd be controversial...

> I believe GvR said that PyPy might (might!) become a sort of
> executable standard for Python in the future, though.

I think that's an impressive idea, but it almost seems like the resources
spent in keeping PyPy and CPython in parallel could be better spent keeping
Jython and CPython in parallel, seeing as nobody is calling PyPy "Python"
currently.

I will check out the Jython list.

Peace,
Dave

-- 
.:[ dave benjamin (ramenboy) -:- www.ramenfest.com -:- www.3dex.com ]:.
: d r i n k i n g   l i f e   o u t   o f   t h e   c o n t a i n e r :


From timr at probo.com  Thu Jan 29 23:24:04 2004
From: timr at probo.com (Tim Roberts)
Date: Thu, 29 Jan 2004 20:24:04 -0800
Subject: wxPython: images from URLs
References: <mailman.810.1075149139.12720.python-list@python.org>
	<fgse10l8pae12p0els55fsujllq2irrj0l@4ax.com>
	<84fc4588.0401280613.771ac07@posting.google.com>
	<mailman.931.1075308709.12720.python-list@python.org>
Message-ID: <b2nj109c414ish57m4s26p1vj4apitn96l@4ax.com>

Jonathan Daugherty <cygnus at cprogrammer.org> wrote:

># self._imgstream = urllib2.urlopen(url).read()
># stream=cStringIO.StringIO(self._imgstream)
># 
># try:
>#    img=wxImageFromStream(stream)
># except:
>#    pass
>
>I have tried this and it appears to work, but once I have
>the image (from wxImageFromStream), I use it as follows:
>
>try:
>    bm = wxBitmap(img)
>    self.bitmap.setBitmap(bm)
>except Exception, e:
>    print e

Why wouldn't you use wxBitmapFromImage?
-- 
- Tim Roberts, timr at probo.com
  Providenza & Boekelheide, Inc.


From sidharthk at hotmail.com  Thu Jan 29 00:17:31 2004
From: sidharthk at hotmail.com (Sidharth Kuruvila)
Date: Thu, 29 Jan 2004 10:47:31 +0530
Subject: Rookie question about data types (hashtables)
References: <Xns947EF14E03FAEgeneralsteveperkins@130.133.1.4>
Message-ID: <bva51k$ptovi$1@ID-223265.news.uni-berlin.de>

the bsddb module has a binary tree database but that might be overkill.
Other than that I doubt there's anything in standard python that would help.

If you don't plan to add any words to your dictionary you could order the
list and use a binary search to find the entries.
you could use python list for that :-)




From claird at lairds.com  Mon Jan 19 08:04:34 2004
From: claird at lairds.com (Cameron Laird)
Date: Mon, 19 Jan 2004 13:04:34 -0000
Subject: Fw: PDF library for reading PDF files
References: <mailman.464.1074430854.12720.python-list@python.org>
	<Xns9474CBDE9B2D7cpl19ghumspamgourmet@62.153.159.134>
	<100luvhbh3vr75d@corp.supernews.com>
	<oxEOb.96911$Vs3.36407@twister.socal.rr.com>
Message-ID: <100nlf2b1qjdae2@corp.supernews.com>

In article <oxEOb.96911$Vs3.36407 at twister.socal.rr.com>,
Robert Kern  <rkern at ucsd.edu> wrote:
>Cameron Laird wrote:
>> In article <Xns9474CBDE9B2D7cpl19ghumspamgourmet at 62.153.159.134>,
>> Harald Massa  <cpl.19.ghum at spamgourmet.com> wrote:
>> 
>>>>I am looking for a library in Python that would read PDF files and I
>>>>could extract information from the PDF with it. I have searched with
>>>>google, but only found libraries that can be used to write PDF files. 
>>>
>>>reportlab has a lib called pagecatcher; it is fully supported with python, 
>>>it is not free.
>>>
>>>Harald
>> 
>> 
>> ReportLab's libraries are great things--but they do not "extract
>> information from the PDF" in the sense I believe the original
>> questioner intended.  
>
>No, but ReportLab (the company) has a product separate from reportlab 
>(the package) called PageCatcher that does exactly what the OP asked 
>for. It is not open source, however, and costs a chunk of change.

Let's take this one step farther.  Two posts now have
quite clearly recommended ReportLab's PageCatcher <URL:
http://reportlab.com/docs/pagecatcher-ds.pdf >.  I
completely understand and agree that ReportLab supports
a mix of open-source, no-fee, and for-fee products, and
that PageCatcher carries a significant license fee.  I
entirely agree that PageCatcher "read[s] PDF files ...
and ... extract[s] information from the PDF with it."

HOWEVER, I suspect that what the original questioner
meant by his words was some sort of PDF-to-text "extrac-
tion" (true?) and, unless PageCatcher has changed a lot
since I got my last copy, PDF-to-text is NOT one of its
functions.  
-- 

Cameron Laird <claird at phaseit.net>
Business:  http://www.Phaseit.net


From __peter__ at web.de  Fri Jan 30 04:02:58 2004
From: __peter__ at web.de (Peter Otten)
Date: Fri, 30 Jan 2004 10:02:58 +0100
Subject: Safe to modify globals(), or not?
References: <6714766d.0401291559.45413e0d@posting.google.com>
	<bvcdt1$8t4$1@panix3.panix.com>
Message-ID: <bvd6hm$9h1$03$1@news.t-online.com>

Aahz wrote:

> import __main__
> tmp = parse_funky_language("Hey, this is far out, man.")
> setattr(__main__, tmp.name, tmp.value)
> 
> In the context of the interactive interpreter, it's a bit harder to do;
> I don't remember off-hand what the namespace of the interpreter is.

You don't need to :-)

Python 2.3.3 (#1, Jan  3 2004, 13:57:08)
[GCC 3.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> __name__
'__main__'

Peter


From and-google at doxdesk.com  Fri Jan 30 09:53:17 2004
From: and-google at doxdesk.com (Andrew Clover)
Date: 30 Jan 2004 06:53:17 -0800
Subject: Python & XML & DTD (warning: noob attack!)
References: <pan.2004.01.29.13.04.44.213048.2804@obda.net>
	<40191C49.786AAF89@engcorp.com>
Message-ID: <2c60a528.0401300653.670674e7@posting.google.com>

Peter Hansen <peter at engcorp.com> wrote:

> Unfortunately I don't know of any way you could generate the DTD again

It is possible to preserve the internal subset in DOM Level 3. You can
read it from the property DocumentType.internalSubset, and it will be
included in documents serialised by an LSSerializer.

It is not, however, possible to write to the internalSubset, and you can't
create a new DocumentType object with a non-empty internalSubset, for some
reason. So the only standard way to copy an internalSubset would be to make
the new document by parsing something with the same value, eg.:

  dtd= oldDocument.doctype.internalSubset
  parser= oldDocument.implementation.createLSParser(1, None)
  input= oldDocument.implementation.createLSInput()
  input.stringData= '<!DOCTYPE x [%s]><x/>' % dtd
  newDocument= parser.parse(input)

> I've never seen a package which supports what you ask for

Plug time: the only package I know of to support DOM Level 3 is my own:

  http://www.doxdesk.com/software/py/pxdom.html

Currently this is based on the November 2003 CR spec; there have been a
number of fixes and changes to L3 functionality since, but I'm waiting for
W3C to publish the next draft (presumably Proposed Recommendation) before
releasing 1.0.

> Also, aren't DTDs sort of considered either obsolete or at least
> vastly inferior to the newer approaches such as XML Schema, or both?

Certainly they have their drawbacks: they're namespace-ignorant, not
flexible enough for some purposes, and they're a legacy bag on the side of
XML rather than something built on top of it in XML syntax.

Still, they're well-understood and widely supported, and simpler to learn
than Schema at least.

-- 
Andrew Clover
mailto:and at doxdesk.com
http://www.doxdesk.com/


From Z_kline at hotmail.com  Tue Jan 27 19:15:17 2004
From: Z_kline at hotmail.com (Zachary)
Date: Tue, 27 Jan 2004 16:15:17 -0800
Subject: Upgrading to Python 3.0 Questions
Message-ID: <bv6uuc$og309$1@ID-221199.news.uni-berlin.de>

Hello,
I've heard some rumors about Python 3.0.  I am wondering what sort of
upgrading I'll have to do, as I have also heard people on this group asking
us to use certain modules or operators or whatever.
Is it a major sort of upgrade?  What would I need to do to prepare for it?
Thanks,
Zack




From not at existing.ru  Fri Jan 23 10:47:38 2004
From: not at existing.ru (bva)
Date: Fri, 23 Jan 2004 16:47:38 +0100
Subject: viewcvs install error on solaris
In-Reply-To: <m3r7xw6vtg.fsf@pc150.maths.bris.ac.uk>
References: <4007e92d$0$325$ba620e4c@news.skynet.be>
	<m3r7xw6vtg.fsf@pc150.maths.bris.ac.uk>
Message-ID: <40114222$0$285$ba620e4c@news.skynet.be>


Michael Hudson wrote:
> bva <not at existing.ru> writes:
> 
> 
>>Hello,
>>
>>While trying to install viewcvs on a solaris 5.9 machine I get the
>>following error message:
>>
>>Traceback (most recent call last):
>>   File "./viewcvs-install", line 35, in ?
>>     import compat
>>   File "./lib/compat.py", line 20, in ?
>>     import urllib
>>   File "/usr/local/lib/python2.2/urllib.py", line 26, in ?
>>     import socket
>>   File "/usr/local/lib/python2.2/socket.py", line 41, in ?
>>     from _socket import *
>>ImportError: No module named _socket
>>
>>Python is installed on the machine.  Can anybody tell me what I'm
>>doing wrong or what I've forgotten?
> 
> 
> Your python install lacks the socket module.  On Solaris this usually
> means something exciting to do with your SSL install.  Who installed
> Python?  Complain at them.
OK I will :-) Thx

> 
> Cheers,
> mwh
> 



From peterwu at hotmail.com  Wed Jan 28 18:00:18 2004
From: peterwu at hotmail.com (Peter Wu)
Date: Wed, 28 Jan 2004 18:00:18 -0500
Subject: Web Service in Python
Message-ID: <87hdyffzlp.fsf@tulip.whu.ca>

I'd like to write a Web Service in Python just for my personal interest
now. Is there any reference or document on this?

-- 
       ,,,
      (o o)       Peter Wu
---ooO-(_)-Ooo--- Powered by GNU/Linux 2.4.22


From kim at lignus.dk  Fri Jan 23 11:39:31 2004
From: kim at lignus.dk (Kim Petersen)
Date: Fri, 23 Jan 2004 17:39:31 +0100
Subject: Help and optimization hints, anyone?
References: <pan.2004.01.23.10.41.31.93597@lignus.dk>
	<87d69a6e2j.fsf@pobox.com>
	<pan.2004.01.23.14.48.47.22980@lignus.dk>
	<87vfn2bpre.fsf@pobox.com>
Message-ID: <pan.2004.01.23.16.39.31.151599@lignus.dk>

Den Fri, 23 Jan 2004 16:20:37 +0000. skrev John J. Lee:

> Kim Petersen <kim at lignus.dk> writes:
>> Den Fri, 23 Jan 2004 12:32:04 +0000. skrev John J. Lee:
> [...]
>> > dict is also a bad name -- this is the name of the builtin dictionary
>> > type, which you've just clobbered (in the local scope).
>> 
>> Hmmm - isn't it called __dict__ ?
> 
> No, __dict__ is an attribute of Python objects.  It's the dictionary
> in which most Python objects keep their data:

ah - the class dict() - yeah i can see that (i didn't notice since
i hardly ever call dict() directly but do it indirectly via {}. Sure
i've clobbered that internally in this class and derived (will change)

>> > Haven't read much further, but it looks like you might be better off
>> > using attribute access rather than indexing.  In 2.2, use properties.
>> > Earlier, use __setattr__ / __getattr__ (make sure you read the docs).
>> 
>> this migrated from a regular dict which i had to drop because its
>> not hashable as mentioned earlier - next step __(get|set)attr__.
> 
> dicts are deliberately not hashable, because they're mutable.  Are you
> sure you want a dict as a dictionary key (assuming that's what you're
> doing)?

I had the columns,rows and cells as simply dicts in the beginning,
but that made self.cells[(row,column)] impossible - so i converted
to classes instead (which works just as well). And migrated func-
tionality to the classes. [this is also the reason for the attributes
being access as dict].
> 
> 
> John

-- 
Privat  ==========================  Kim Petersen  ====================  Arbejde
Email kim at vindinggaard.dk  =====  Jens Gr?ns Vej 11  =====  Email kim at lignus.dk
Tlf +45 75 83 15 50  ==============  7100 Vejle  =========  Tlf +45 75 83 15 51
Fax +45 75 83 15 62  =============  DK - Danmark  ========  Fax +45 75 83 15 62



From peter at engcorp.com  Tue Jan 20 11:48:40 2004
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 20 Jan 2004 11:48:40 -0500
Subject: Please Help Me (Re: needed PyXPCOM tutorial.)
References: <425cc8d1.0401150908.287de0d8@posting.google.com>
	<mailman.415.1074196966.12720.python-list@python.org>
	<425cc8d1.0401170903.3c331ab9@posting.google.com>
	<425cc8d1.0401200844.f6dcf9c@posting.google.com>
Message-ID: <400D5BE8.369E598E@engcorp.com>

mir nazim wrote:
> 
> Please help me  find some tutorials on pyxpcom. my project is at hold due to it.

I'm sort of guessing that if http://www.google.com/search?q=tutorial+pyxpcom doesn't
help you with that, then nothing will.


From newspost at lolmc.com  Sat Jan  3 08:50:07 2004
From: newspost at lolmc.com (Lol McBride)
Date: Sat, 03 Jan 2004 13:50:07 +0000
Subject: mysql python Newbie Question
References: <vvc80lb8mstue1@corp.supernews.com>
Message-ID: <pan.2004.01.03.13.50.05.409415@lolmc.com>

On Sat, 03 Jan 2004 17:50:03 -0800, Andrew wrote:

> Hi I would like to create a program that accesses mysql from a gui on my
> local computer "mysql is on a server"
> 
> but I am fairly new to python and programming GUI's in general
> 
> What I would like this program to do is be able to access my server and
> change update add and delete records from my databases without having to
> write sql.
> 
> I can create the GUI fairly easily but I do not know how I or what functions
> and modules would be needed to do this or how to write them "Forgive me if I
> sound to Newb"
> 
> If someone out there could help me out maybe offer advice or even better
> some code to build on that would be cool
> 
> Thanks in advance
> 
> Cheers
> 
> Andrew
Hi Andrew,
I think you'll find that you still have to master SQL and it's
nonclementure as Python only provides a DB-API and you need to know the
SQL in order to use the API to send your queries etc.
I've recently started using it and although at first SQL seems daunting
you do get the hang of it after time - like most languages really.If you
need specific help get in touch and I'll help were I can.
Lol McBride



From flemming at bjerke.dk  Thu Jan 29 05:41:54 2004
From: flemming at bjerke.dk (flemming at bjerke.dk)
Date: 29 Jan 2004 10:41:54 -0000
Subject: I have changed my e-mail address
Message-ID: <20040129104154.94258.qmail@dmerhverv.org>

Send mail til: flem[SLET DETTE]@bjerke.dk



Send mail to: flem[DELETE THIS]@bjerke.dk



I close flemming at bjerke.dk.



Flemming





From tim.golden at viacom-outdoor.co.uk  Wed Jan 21 10:00:39 2004
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Wed, 21 Jan 2004 15:00:39 -0000
Subject: Dailing modem.
Message-ID: <F1921F85572CB04D9F55B14BDC76B3E4434643@tdi_nt9.internal.viacom-outdoor.co.uk>

>Is the win32ras realy what I want? Basically what I am trying 
>to do, is to
>convert my phone/voice-modem/computer into a "computer-phone". 
>I need to
>dail a number and disconnect via an interface on the computer 
>using python.
>So, I am dailing normal numbers and not RAS servers. Or am I missing
>something?

Ah. Sorry. Misunderstood. No, you're quite right: RAS is not
what you want. (Backs away, humbled and blushing...)

What you probably want is one of the Python-to-serial interfaces
(assuming that your modem is of the conventional variety which
pretends to be a serial port, even if it's not).

Try: http://pyserial.sourceforge.net/

or possibly:
http://balder.prohosting.com/ibarona/en/python/uspp/uspp_en.html

and then talk "AT" language to it, or whatever dialect it speaks: 
http://www.modems.com/general/extendat.html

(2nd time lucky?)
TJG


________________________________________________________________________
This e-mail has been scanned for all viruses by Star Internet. The
service is powered by MessageLabs. For more information on a proactive
anti-virus service working around the clock, around the globe, visit:
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From usenet at -OBFUSCATION-joefrancia.com  Wed Jan 28 13:41:34 2004
From: usenet at -OBFUSCATION-joefrancia.com (Joe Francia)
Date: Wed, 28 Jan 2004 18:41:34 GMT
Subject: Nested lists or conditional logic?
In-Reply-To: <ead93a6.0401280956.41fd4193@posting.google.com>
References: <ead93a6.0401280956.41fd4193@posting.google.com>
Message-ID: <ynTRb.5888433$be.961191@news.easynews.com>

mike beck wrote:
 > this is not all complex, but as a noob i'm having a hard time getting
 > my head around it.
 >
 > i have a list of items. i need to print the items in batches of x,
 > with a summary line after each complete or partial batch, and a total
 > line at the end of the job.
 >
 > if the list looks like ['line1','line2','line3'], and my ITEMSINBATCH
 > = 1, the output should look like this:
 >
 > line1
 > ---summary line---
 > line2
 > ---summary line---
 > line3
 > ---summary line---
 > ---total line---
 >
 > if ITEMSINBATCH = 2, the output should look like this:
 >
 > line1
 > line2
 > ---summary line---
 > line3
 > ---summary line---
 > ---total line---
 >
 > i've done the following, which works, but it seems like there must be
 > a better/simpler/faster way to do this with nested loops. ideas?
 >
 >
 > # ---------------------Begin code---------------------
 > ITEMSINBATCH = 1;
 > ARBITRARYNUM = 51;
 >
 > # create a list to work with
 > myList = ['1']*ARBITRARYNUM;
 >
 > for i in range( len(myList) ):
 >     # avoid starting at 0
 >     count = i + 1;
 >
 >     print "The item is:",myList[i],'\t',count;
 >
 >     # ensure that the batch summary line is printed every ITEMSINBATCH
 >     # times but not if the number of items is evenly divisible by
 >     # ITEMSINBATCH, in which case both the inner print and the outer
 >     # print would execute and we'd get consecutive batch summary lines
 >     if ( (count) % ITEMSINBATCH ) is 0 and count != len(myList)::
 >         print "-----Add batch summary line-----";
 >
 > # add a final batch line for those trailing items
 > print "------Add batch summary line------And BTW, i is", count;
 >
 > # and add the final summary line
 > print "------Add file summary------";
 >
 > # ---------------------End code---------------------


I'm not sure this is faster, but it sure is simpler:

mylist = range(23)
batchsize = 4

for i in range(0,len(mylist),batchsize):
     for l in mylist[i:i+batchsize]:
         print l
     print "---summary line---"
print "---file summary---"



-- 
Soraia: http://www.soraia.com


From swalters_usenet at yahoo.com  Fri Jan  9 16:17:24 2004
From: swalters_usenet at yahoo.com (Samuel Walters)
Date: Fri, 09 Jan 2004 21:17:24 GMT
Subject: urllib - changing the user agent
References: <8089854e.0401090509.3dd74859@posting.google.com>
	<n20uvvshb3mnj53qlbfto1fofamnomj88g@4ax.com>
	<871xq8ri6h.fsf@pobox.com>
Message-ID: <pan.2004.01.09.21.16.06.156445@yahoo.com>

|Thus Spake John J. Lee On the now historical date of Fri, 09 Jan 2004
20:16:54 +0000|
 
> or again, you can set .addheaders on OpenerDirector (which will cause
> those headers to be added to all requests).

This, however, does not stop the original User-agent header to be sent,
and google still filters out the request.  Instead, it just causes a
second user-agent to be sent.

Here is the very bad code I used to solve this problem.  There are better
ways, I assure you, but it should point you in the right direction.  You
should probably do this with inheritance, but for my quick script, this is
what I did.

----
#Override the default OpenerDirector Class Init.
#OpenerDirector *insists* on adding a User-Agent 
#That some websites don't like.
foo = OpenerDirector.__init__
def bar(self, Agent='None'):
         foo(self)
         self.addheaders = [('User-Agent',Agent)]
 
OpenerDirector.__init__ = bar
-----

HTH

Sam Walters.



-- 
Never forget the halloween documents.
http://www.opensource.org/halloween/
""" Where will Microsoft try to drag you today?
    Do you really want to go there?"""



From grreeder at ix.netcom.com  Fri Jan 23 12:47:50 2004
From: grreeder at ix.netcom.com (jr)
Date: Fri, 23 Jan 2004 17:47:50 GMT
Subject: Sending Through ^] Through telnetlib
References: <mailman.687.1074866920.12720.python-list@python.org>
Message-ID: <a7dQb.23867$1e.17869@newsread2.news.pas.earthlink.net>

Try sending:  '\x1d'

HTH
-jr

"John Abel" <john.abel at pa.press.net> wrote in message news:mailman.687.1074866920.12720.python-list at python.org...
> I have written a script that makes a telnet connection, runs various
> commands, and returns the output.  That was the easy bit :)  However, to
> close the session, I need to send ^] followed by quit.  I've tried
> sending chr(29), which is the ascii equivalent, but that doesn't seem to
> work.  Is there something I'm missing?
>
> Any pointers would be much appreciated.
>
> Thanks
>
> J
>




From exarkun at intarweb.us  Fri Jan 30 09:42:54 2004
From: exarkun at intarweb.us (Jp Calderone)
Date: Fri, 30 Jan 2004 09:42:54 -0500
Subject: NEWLINE character problem
In-Reply-To: <011101c3e73b$9da26c20$2f01a8c0@dchirila>
References: <011101c3e73b$9da26c20$2f01a8c0@dchirila>
Message-ID: <20040130144254.GA29356@intarweb.us>

On Fri, Jan 30, 2004 at 04:16:12PM +0200, Dragos Chirila wrote:
> Hi
> 
> I have a string and I want to split it by NEWLINE character.
> 
> It is knowned that "Microsoft Windows, Apple's Macintosh OS and various
> UNIX, all use different characters to mark the ends of lines in text files.
> Unix uses the linefeed (ASCII character 10), MacOS uses the carriage return
> (ASCII character 13), and Windows uses a two-character sequence of a
> carriage return plus a newline". So, PLEASE don't tell me to use 'split' by
> '\n' because it won't work.

  s.splitlines()

  Jp



From marco at bubke.de  Mon Jan 19 13:33:28 2004
From: marco at bubke.de (Marco Bubke)
Date: Mon, 19 Jan 2004 19:33:28 +0100
Subject: Pyrex and numarray
Message-ID: <buh7to$ldk$1@graf.cs.uni-magdeburg.de>

Hi 

I have tried to include numarray in Pyrex but I get allways 
this error:

Traceback (most recent call last):
  File "gears.py", line 9, in ?
    import gl
  File "/home/marco/projects/test_pyrex/gl.pyx", line 40, in gl
    ctypedef class numarray.NumArray [object PyArrayObject]:
ValueError: numarray.NumArray does not appear to be the correct type object

The code is:

cdef extern from "numarray/numarray.h":
  struct PyArray_Descr: 
    int type_num, elsize 
    char type 


  ctypedef class numarray.NumArray [object PyArrayObject]: 
    cdef char *data 
    cdef int nd 
    cdef int *dimensions, *strides 
    cdef object base 
    cdef PyArray_Descr *descr 
    cdef int flags
    cdef object _data
    cdef object _shadows
    cdef long int nstrides
    cdef long byteoffset
    cdef long bytestride
    cdef long itemsize
    cdef char byteorder
    cdef char _aligned
    cdef char _contiguous
    cdef char *wptr


def materialfv(GLenum face, GLenum pname, NumArray params):
  """
  Set the material.
  
  materialfv(enum face, enum pname, params)
  
  params - should be a tuple
  
  """
  assert (len(params) == 4 and pname in \
    (AMBIENT, DIFFUSE, SPECULAR, EMISSION, AMBIENT_AND_DIFFUSE))\
    or (len(params) == 1 and pname == SHININESS) \
    or (len(param) == 1 and pname == COLOR_INDEXES),\
    "arguments are not right"
  str_params = params.tostring()
  print str_params
  cdef float* flat_params
  flat_params = <float*>str_params
  glMaterialfv(face, pname, flat_params)

I write a little OpenGL wrapper of my own(I know PyOpenGL but it doesn't fit
to me). Now I try to get the numarray to this function and cast it to a
float pointer(ugly hack, will be cleaned later).

regards

Marco



From bhan at andrew.cmu.edu  Fri Jan 23 16:00:36 2004
From: bhan at andrew.cmu.edu (Han Benjamin)
Date: Fri, 23 Jan 2004 16:00:36 -0500
Subject: Psyco on PowerPC?
Message-ID: <30E0BEC9-4DE7-11D8-B663-000393DB5438@andrew.cmu.edu>

Is anyone aware of any effort in bringing Psyco onto other platforms, 
esp. PowerPC (Mac OS X)? I checked the website but it's still stated as 
X86 only.

Thanks,

Ben



From reply.in.the.newsgroup at my.address.is.invalid  Tue Jan 20 15:50:33 2004
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Tue, 20 Jan 2004 21:50:33 +0100
Subject: an example of a singleton design pattern in python?
References: <hc63caapdui.fsf@praxis.lsil.com>
Message-ID: <645r00hicslg2qn55sncentdk8alnbevab@4ax.com>

Daniel Ortmann:
>Does anyone have an example of a singleton design pattern in python?

http://aspn.activestate.com/ASPN/search?query=singleton&section=PYTHONCKBK&type=Subsection

-- 
Ren? Pijlman


From ccang at iprimus.com.au  Thu Jan 15 22:05:40 2004
From: ccang at iprimus.com.au (cc)
Date: Fri, 16 Jan 2004 14:05:40 +1100
Subject: id3v2 module
In-Reply-To: <pan.2004.01.13.09.12.39.813880@beeznest.NOSPAM.net>
References: <pan.2004.01.13.09.12.39.813880@beeznest.NOSPAM.net>
Message-ID: <4007533f_1@news.iprimus.com.au>

Dusausoy Bruno wrote:
> Hi,
> 
> I'd like to know if there is a third-party module for reading/writing
> id3v2 informations.
> Thanks 

Yet another id3 v2 but it does read only....
http://home.iprimus.com.au/ccang/scripts.html

(I lost interest and didnt do the 'write' part).
-- 
|  The words GULLIBLE read the same when held in
|   front of a mirror.



From sidharthk at hotmail.com  Mon Jan 26 04:01:15 2004
From: sidharthk at hotmail.com (Sidharthk)
Date: 26 Jan 2004 01:01:15 -0800
Subject: efficient updating of nested dictionaries
References: <H%_Qb.2609$925.1917@nwrddc02.gnilink.net>
Message-ID: <8d02ff63.0401260005.20b52b9f@posting.google.com>

omission9 <omission9 at invalid.email.info> wrote in message news:<H%_Qb.2609$925.1917 at nwrddc02.gnilink.net>...
> I have a dictionary that looks like this
> MY_DICT[KEY_X][KEY_Y][KEY_Z]=FOO
> 
> I am having a problem updating this with a simple 
> MY_DICT.update(NEW_DICT) as update doesn't seem to care about getting 
> into the inner dicts.
> Getting the keys of each and iterating through and updating each one is 
> terribly slow as the number of keys gets bigger and bigger.
> What is the bst way to update my nested dicts?

Use Tuples

MY_DICT[(KEY_X,KEY_Y,KEY_Z)]=FOO

Unless for some you need to use nested dicts :)


From tim.golden at viacom-outdoor.co.uk  Fri Jan 30 11:42:53 2004
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Fri, 30 Jan 2004 16:42:53 -0000
Subject: How to start a DTS Package on MS-SQL-Server?
Message-ID: <F1921F85572CB04D9F55B14BDC76B3E44346B1@tdi_nt9.internal.viacom-outdoor.co.uk>

>-----Original Message-----
>From: usenet at mail-2-me.com [mailto:usenet at mail-2-me.com]
>Sent: 30 January 2004 12:48
>To: python-list at python.org
>Subject: How to start a DTS Package on MS-SQL-Server?
>
>
>Hi!
>
>Does anybody know how to start a DTS-Package on a MS-SQL-Server out of
>a Python-Script?
>
>Thanks for your help!
>
>Dirk

Haven't tried it, but there is a dtsrun executable
(C:\Program Files\Microsoft SQL Server\80\Tools\BINN\dtsrun.EXE)
in my setup, which seems hopeful.

There is also a DTS COM library which might do something.

TJG


________________________________________________________________________
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From dkuhlman at rexx.com  Sun Jan  4 15:48:07 2004
From: dkuhlman at rexx.com (Dave Kuhlman)
Date: Sun, 04 Jan 2004 12:48:07 -0800
Subject: Let users execute but not view
References: <bt9o11$7rq$05$1@news.t-online.com>
Message-ID: <bt9u5t$4subr$1@ID-139865.news.uni-berlin.de>

Florian Lindner wrote:

> Hi!
> I have a python script which should be executed my normal users
> but they should not be able to view the sourcecode. Setting
> permissions to x only does not help, the python interpreter can
> not read the file. How can I do that?

Compile it to a .pyc file and give that to your users instead of
the .py file.  You can use py_compile or compileall in the Python
standard libraries for this.

Note, however, that this does not protect you from the really
inquisitive or from malicious users and so on.  They could use
dis, for example, from the Python standard library to learn about
your code.

Dave

-- 
http://www.rexx.com/~dkuhlman
dkuhlman at rexx.com


From llothar at web.de  Sun Jan 25 08:21:26 2004
From: llothar at web.de (Lothar Scholz)
Date: 25 Jan 2004 05:21:26 -0800
Subject: [OPINION] - does language really matter if they all do the same
	thing?
References: <20040123183127.GA35281@mail.hitmedia.com>
	<mailman.708.1074883454.12720.python-list@python.org>
Message-ID: <6ee58e07.0401250521.2e26e370@posting.google.com>

Jonathan Daugherty <cygnus at cprogrammer.org> wrote in message news:<mailman.708.1074883454.12720.python-list at python.org>...

> that english and arabic are, in the same sense, just two sides
> of the same coin, which is a gross oversimplification of the
> matter and a disrespect to the qualities of the languages

english and arabic are quite equal. compare it with tonal asian
languages then you find some real difference. For example in the thai
language there is no word that means "No", you can only politely deny
"yes". This is mental difference.


From blaktyger at hotmail.com  Tue Jan  6 02:32:53 2004
From: blaktyger at hotmail.com (Blaktyger)
Date: 5 Jan 2004 23:32:53 -0800
Subject: Downloading files off Interet
Message-ID: <c9e6ac92.0401052332.294e2373@posting.google.com>

I would like to download some mp3 files from a web site. There is to
much of them and I had the idea of writing a script to do it for me.

Code:
import string
import urllib

f = urllib.urlopen(""" http://www.somemp3site.com/somemp3.com""")

fic=open('mp3file.mp3','w')
fic.write(f.read())
fic.close()
f.close()

I ran the program and the file is not playing.
Can someone help me?
Thanks


From martin at v.loewis.de  Fri Jan 16 18:10:47 2004
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 17 Jan 2004 00:10:47 +0100
Subject: Retrive unicode keys from the registry
In-Reply-To: <1xpzaa8i.fsf@python.net>
References: <brp3bzwj.fsf@python.net>
	<KSXNb.15179$Wa.2061@news-server.bigpond.net.au>
	<1xpzaa8i.fsf@python.net>
Message-ID: <bu9r1f$sc4$00$2@news.t-online.com>

Thomas Heller wrote:

> My understanding is that it's possible to convert any (for a certain
> definition of 'any) unicode string in a byte string (because the
> encoding for the byte string can be specified), but that it's impossible
> to convert a byte string into unicode unless the byte string's encoding
> is known.
> 
> Maybe this only shows my un-understanding of unicode...

It certainly is. It is possible to create a registry key which the
"ANSI" API (RegQueryValueExA) cannot find - i.e. where you truly
need the "wide" API (RegQueryValueExW).

An example would be a registry key with Cyrillic, Greek, or Japanese
characters on your system. Encoding them as "mbcs" will convert those
characters into question marks (which is a bug in itself - Python
should rasise an exception instead).

Regards,
Martin



From john at thegreys.co.uk  Thu Jan 22 09:26:13 2004
From: john at thegreys.co.uk (John)
Date: 22 Jan 2004 06:26:13 -0800
Subject: pass parameter to select tinytable to update
Message-ID: <33dff922.0401220626.6e5e970c@posting.google.com>

Hi 
I'm new to zope/python and hope this is fairly easy - I want to update
a TinyTablePlus table from a script.  So the following will do what I
want on the table 'igrid'.

context.igrid.setRow(number=number,score=newscore)

But how can I do this on different tables where the table is passed to
the script as a parameter - instead if igrid  I want to include the
value of the parameter.


thanks, John


From exarkun at intarweb.us  Sat Jan 24 12:03:48 2004
From: exarkun at intarweb.us (Jp Calderone)
Date: Sat, 24 Jan 2004 12:03:48 -0500
Subject: there is no exitfunc in sys module
In-Reply-To: <20040124080753.97159.qmail@web61109.mail.yahoo.com>
References: <20040124080753.97159.qmail@web61109.mail.yahoo.com>
Message-ID: <20040124170348.GA7002@intarweb.us>

On Sat, Jan 24, 2004 at 12:07:53AM -0800, Hameed Khan wrote:
> hi,
>  i was reading the manual for sys module. i found a
> description for a function known as exitfunc. and it
> says the function installed by
> sys.exitfunc(cleanUpFunc) call will be called when the
> interpreter exits. but when i try to call this
> function on Python interactive prompt it says there is
> no attribute named exitfunc in sys module.

  Use of sys.exitfunc is deprecated.  Use the atexit module instead.

  The sys module does not have the exitfunc attribute unless you give it
one.  The proper (old, deprecated) way to do this was:

    sys.exitfunc = cleanUpFunc

  The new, non-deprecated, proper way to this is:

    atexit.register(cleanUpFuncC)

  Jp



From exarkun at intarweb.us  Fri Jan 16 14:29:59 2004
From: exarkun at intarweb.us (Jp Calderone)
Date: Fri, 16 Jan 2004 14:29:59 -0500
Subject: Web Form Error Handling Techniques
In-Reply-To: <EF4981BC-484C-11D8-8401-000A95C48278@sfsu.edu>
References: <EF4981BC-484C-11D8-8401-000A95C48278@sfsu.edu>
Message-ID: <20040116192959.GB27129@intarweb.us>

On Fri, Jan 16, 2004 at 09:53:47AM -0800, Sean Abrahams wrote:
> The following is a reprint of a message I sent to the tutor list a long 
> time ago, that I haven't gotten around to discussing with anyone else 
> and failed to hear a reply on the tutor list. Hoping someone here may 
> want to have some dialog.
> 
> --
> 
> I'm learning to write unit tests and am trying to write them for a web
> application I'm working on.
> 
> I'm currently writing a test that is to purposefully fail by passing
> invalid data to a function. However this brought me to thinking about
> how to handle errors.
> 
> Let me set up a hypothetical scenario.
> 
> I have a web form with name and age as its two fields. When a person
> enters his/her information and submits the form, I take the two fields
> and create a dict that contains {'name' : 'Foo', 'age' : '82'}.
> 
> I pass this information to a function called, insertData which
> looks something like this:
> 
> def insertData(data):
> 
>     # test data for validity
>     if not data['name'].isalpha():
>        raise InvalidDataError(data['name'], "Name contains non-alpha
>        characters")
>     if not data['age'].isdigit():
>        raise InvalidDataError(data['age'], "Age contains non-digit
>        characters")
> 
>     sql = """
>     INSERT INTO people (name, age) VALUES ('%s', '%s')
>     """ % (data['name'], data['age'])
> 
>     executeSQL(sql)

  The last two statements are not ideal.  You probably want:

    sql = """
    INSERT INTO people (name, age) VALUES(%s, %s)
    """
    args = (data['name'], data['age'])

    executeSQL(sql, args)

  instead.  But that's not what you asked about..

> 
> I should first check to see if the data is valid, meaning that the
> name contains only alpha characters and the age only containing
> numeric characters.
> 
> If I raise an exception, how would one handle the reprinting of the
> web form with a red * next to the field that contains invalid data? If
> one field is in error, I can see that upon receiving an exception you
> can have your code just reprint the web form with the red star, but
> what about when both fields are in error, do you have the exception
> create a list which then your code checks to see if it exists and then
> loops through it to know what fields are in error?
> 
> And then again, perhaps I'm completely wrong and am going about this
> in an amateur manner.

  Consider this version of insertData:

    def insertData(data):
        errors = {}
        if not data['name'].isalpha():
            errors['name'] = InvalidDataError(data['name'], "...")
        if not data['age'].isdigit():
            errors['age'] = InvalidDataError(data['age'], "...")

        if errors:
            raise InvalidFormPostError(data, errors)
        
        # Your version, to minimize changes
        sql = """
        INSERT INTO people (name, age) VALUES ('%s', '%s')
        """ % (data['name'], data['age'])

        executeSQL(sql)

  Now full form validation can be attempted, and full information about
which fields are erroneous is available.  Those fields can be marked, and
the rest can be filled out with the values previously entered.

  Nevow might also be of interest to you.  It offloads much of the work of
form validation:

    http://stewstuff.com/doc/nevow.xhtml
    http://soundfarmer.com/content/logs/NevowLecture11-25-03.txt
    http://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-web

  Jp



From bhoel at web.de  Sat Jan  3 17:31:35 2004
From: bhoel at web.de (Berthold Höllmann)
Date: Sat, 03 Jan 2004 23:31:35 +0100
Subject: make test segfaults with "--enable-shared" on Python 2.3.3
References: <m265g1dxsr.fsf@pchoel.psh> <m2znddcj23.fsf@pchoel.psh>
	<mailman.148.1072656915.684.python-list@python.org>
	<m2y8sv76f9.fsf@pchoel.psh>
	<mailman.30.1072761244.8134.python-list@python.org>
Message-ID: <m2znd4mzp4.fsf@pchoel.psh>

Andrew MacIntyre <andymac at bullseye.apana.org.au> writes:

> On Mon, 29 Dec 2003, Berthold H?llmann wrote:
>
>> so it seems that the other modules loaded in the "make test" run
>> decrease the avaliable stack so that the test does not succeed but
>> calling the test alone finds enough stack space avaliable?
...
> Note that there are some subtleties here - even though your ulimit says
> unlimited stackspace, in the presence of threads this may not hold.
> It certainly doesn't on FreeBSD 4.x where there the pthreads support has a
> hardcoded 1MB stack for the primary thread (which is what is running the

I found a document stating it is 2MB for each thread on Linux using Google

> regression test and is distinct from the stack created for each
> instantiated thread).  The LinuxThreads port on FreeBSD seems not to have
> the same restriction.  Exactly what is happening on your Linux system I
> don't know; you would have to do some research to find out.
>
> Depending on how you wish to proceed, you have a couple of options:
> - build normally, then blow away Modules/_sre.o and recompile
>   Modules/_sre.c with -Os (just temporarily doctor the Makefile).
>   From what I've seen -Os cuts the stack consumption enough to get
>   you through the full test suite, and doesn't seriously impact sre's
>   performance.

This does work for me

> - modify the USE_RECURSION_LIMIT macro in Modules/_sre.c to a lower value
>   and rebuild. Linux would be using the default definition of 10000 at
>   line 98 (for 2.3.3).

        #define USE_RECURSION_LIMIT 6835

does succeed,

        #define USE_RECURSION_LIMIT 6840

gives segfault for me. Will submit bugreport.

> - find a way to change the default stack size for the primary thread.

To be honest: I don't have an idea where to look at for this.

Regards

Berthold
-- 
bhoel at web.de / http://starship.python.net/crew/bhoel/
        It is unlawful to use this email address for unsolicited ads
        (USC Title 47 Sec.227). I will assess a US$500 charge for
        reviewing and deleting each unsolicited ad.


From PeterAbel at gmx.net  Fri Jan 16 07:42:47 2004
From: PeterAbel at gmx.net (Peter Abel)
Date: 16 Jan 2004 04:42:47 -0800
Subject: Quick question.....
References: <mailman.370.1074115102.12720.python-list@python.org>
	<379178f1.0401151634.556bb405@posting.google.com>
Message-ID: <21064255.0401160442.64a99937@posting.google.com>

featherstone80 at hotmail.com (Narsil) wrote in message news:<379178f1.0401151634.556bb405 at posting.google.com>...
> I tried that.  I get the following error message
> 
> Traceback (most recent call last):
>   File "E:\python\fun4b.py", line 80, in ?
>     menu()
>   File "E:\University\python\assign4b.py", line 49, in menu
>     print sum(weektotlist)
> NameError: global name 'sum' is not defined
> 
> What did I do wrong?
> 
> TomN
> 
> "Batista, Facundo" <FBatista at uniFON.com.ar> wrote in message news:<mailman.370.1074115102.12720.python-list at python.org>...
> > featherstone80 wrote:
> > 
> > #- numberlist = [10, 2, 5, 7, 3, 46, 4, 5, 87, 5]
> > #- 
> > #- How would I get the total, and how would I get the average?
> > 
> > 
> > Python 2.3 (#46, Jul 29 2003, 18:54:32) [MSC v.1200 32 bit (Intel)] on win32
> > ...
> > >>> numberlist = [10, 2, 5, 7, 3, 46, 4, 5, 87, 5]
> > >>> sum(numberlist)
>  174
> > >>> len(numberlist)
>  10
> > >>> sum(numberlist)/len(numberlist)
>  17
> > >>> from __future__ import division
> > >>> sum(numberlist)/len(numberlist)
> > 17.399999999999999
> > 
> > .	Facundo

As David told you it depends on your Pyhton version, but
a sum-function is one-liner in Python:

>>> sum=lambda numberlist:reduce(lambda x,y:x+y,numberlist,0.0)
>>> # Remark, I use 0.0 as startvalue to force float
>>> numberlist = [10, 2, 5, 7, 3, 46, 4, 5, 87, 5]
>>> sum(numberlist)/len(numberlist)
17.399999999999999
>>> 

Regards
Peter


From scott.micciche at sbcglobal.net  Wed Jan 28 23:11:32 2004
From: scott.micciche at sbcglobal.net (Scott (The Kurgan) Micciche)
Date: Thu, 29 Jan 2004 04:11:32 GMT
Subject: Web Service in Python
References: <87hdyffzlp.fsf@tulip.whu.ca>
Message-ID: <UJ%Rb.19096$A61.3506@newssvr25.news.prodigy.com>

Try this link:

http://pywebsvcs.sourceforge.net/


"Peter Wu" <peterwu at hotmail.com> wrote in message
news:87hdyffzlp.fsf at tulip.whu.ca...
> I'd like to write a Web Service in Python just for my personal interest
> now. Is there any reference or document on this?
>
> -- 
>        ,,,
>       (o o)       Peter Wu
> ---ooO-(_)-Ooo--- Powered by GNU/Linux 2.4.22




From fuf at mageo.cz  Thu Jan 29 03:37:46 2004
From: fuf at mageo.cz (Michal Vitecek)
Date: Thu, 29 Jan 2004 09:37:46 +0100
Subject: isinstance() bug
In-Reply-To: <ZnURb.45568$U%5.239709@attbi_s03>
References: <mailman.925.1075304492.12720.python-list@python.org>
	<ZnURb.45568$U%5.239709@attbi_s03>
Message-ID: <20040129083746.GA27504@foof.i3.cz>

Rainer Deyke wrote:
>Michal Vitecek wrote:
>>  it's my belief that if i'm instantiating a class from the same
>>  location no matter how i imported its definition, its instances are
>>  always of the same class.
>
>Your belief is incorrect.  'package.module.A' and 'module.A' are distinct
>classes.  Modifications to one do not show up in the other.  If 'isinstance'
>reported that an instance of 'package.module.A' is an instance of
>'module.A', 'isinstance' would be broken and unusable.

 could you elaborate further why do you consider the current behaviour
 to be correct? you've only described how it works currently. i'd be
 interested what's the reasoning behind that.
 
 i'm inclined to think that the current behaviour is a side-effect of
 the implementation (perhaps to which some got used to?).

-- 
		fuf		(fuf at mageo.cz)



From jtdubs at eos.ncsu.edu  Sat Jan 24 01:02:55 2004
From: jtdubs at eos.ncsu.edu (Justin Dubs)
Date: 23 Jan 2004 22:02:55 -0800
Subject: pty difficulties
Message-ID: <2e262238.0401232202.5b21eba8@posting.google.com>

I'm writing a utility that runs a program inside of a pseudo-tty and
then multiplexes both stdin and a fifo to the child's pty via a select
loop.

In other words, you run my program, tell it the name of the program to
run and the name of the fifo to use and then you can interact with the
program as per usual.  However, you can also send data into the fifo
and the program will see it as input just as if you'd typed it on the
keyboard.

As a test I'm running sbcl (a lisp interpreter) through my python
program.  It works like a charm in normal usage.  However, if I dump
more than 2K or so of code into the FIFO, sbcl gets the first K fine,
but then seems to miss a chunk, get another character or two and then
freeze.  After that I am unable to interact with it via either stdin
or the fifo even though the select loop is still running.  The pty
just seems to be dead, eating input and giving nothing back.  So, I
tried running a different Lisp interpreter (openmcl) instead, but the
problem persisted.  So, I just ran vim through it and it handled the
2K of text just fine.

However, vim is just sending the text into a buffer where-as sbcl is
parsing and compiling it.  If I add a sleep(1.0) after data is sent
from the fifo to the pty then the problem goes away.  So, it seems
like if the child process can't pull things out of it's stdin as fast
as I'm putting it in, something goes awry.

Has anyone seen similar behavior?  Does anyone have any idea why this
would be happening?

Any help would be greatly appreciated.  Thanks everyone.  The code is
below.

Justin Dubs


Here's the code:

from time    import sleep
from pty     import spawn, fork
from sys     import stdin, stdout, stderr, exit, argv
from os      import fdopen, open, read, write, O_RDONLY, O_NONBLOCK
from select  import select
from termios import tcgetattr, tcsetattr, tcdrain, ECHO, TCSADRAIN
from tty     import setraw

if (len(argv) != 3):
    print "usage: vee.py program pipe"
    exit(0)

pid, childID = fork()

if pid == 0:
    spawn(argv[1])
else:
    fifo  = fdopen(open(argv[2], O_RDONLY | O_NONBLOCK), 'r')
    child = fdopen(childID, 'r+')

    attribs = tcgetattr(stdin)
    attribs[3] = attribs[3] & ~ECHO
    tcsetattr(stdin, TCSADRAIN, attribs)

    setraw(stdin)

    connections = { child : stdout, stdin : child, fifo : child }

    try:
        while True:
            readable = select(connections.keys(), [], [])[0]
            for f in readable:
                data = read(f.fileno(), 1024)
                connections[f].write(data)
                connections[f].flush()
    except (OSError, IOError):
        exit(0)


From gerrit at nl.linux.org  Fri Jan 23 11:54:15 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Fri, 23 Jan 2004 17:54:15 +0100
Subject: get "yesterday's" date in iso format
In-Reply-To: <877jzjb7o4.fsf@mrbun.watterson>
References: <pan.2004.01.23.04.13.55.406832@quanta1.world-vr_stupidspambot.com>
	<877jzjb7o4.fsf@mrbun.watterson>
Message-ID: <20040123165415.GB4137@nl.linux.org>

Tim Heaney wrote:
> necromancer_stupidspambot at quanta1.world-vr_stupidspambot.com writes:
> >
> > I am trying to find a simple way to get "yesterday's" date.
> 
> Since time.time() gives the time in seconds since the epoch, you could
> just subtract a day from that to get yesterday.

Even better:

>>> from datetime import date, timedelta
>>> (date.today() - timedelta(1)).day
22

yours,
Gerrit.

-- 
179. If a "sister of a god," or a prostitute, receive a gift from her
father, and a deed in which it has been explicitly stated that she may
dispose of it as she pleases, and give her complete disposition thereof:
if then her father die, then she may leave her property to whomsoever she
pleases. Her brothers can raise no claim thereto.
          -- 1780 BC, Hammurabi, Code of Law
-- 
PrePEP: Builtin path type
    http://people.nl.linux.org/~gerrit/creaties/path/pep-xxxx.html
Asperger's Syndrome - a personal approach:
	http://people.nl.linux.org/~gerrit/english/



From jepler at unpythonic.net  Sat Jan  3 23:01:28 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Sat, 3 Jan 2004 22:01:28 -0600
Subject: Advanced (?) compiling, freezing, translating Python
In-Reply-To: <312735AC.3841CC26.0331AA34@netscape.net>
References: <312735AC.3841CC26.0331AA34@netscape.net>
Message-ID: <20040104040128.GA18000@unpythonic.net>

Here's one more link to add to the list of things that aren't what
you're looking for:
	http://www.strout.net/python/ai/
(at the "python2c" heading)

Jeff



From bkelley at wi.mit.edu  Mon Jan 26 19:27:55 2004
From: bkelley at wi.mit.edu (Brian Kelley)
Date: Tue, 27 Jan 2004 00:27:55 GMT
Subject: wxpython and wxlocale
In-Reply-To: <bv403p$3ot$1@atlantis.news.tpi.pl>
References: <bv3ur6$bm1$1@news.ya.com> <bv403p$3ot$1@atlantis.news.tpi.pl>
Message-ID: <fgiRb.29411$U%5.190085@attbi_s03>

Jarek Zgoda wrote:
> Ya <tmartinez at ammsoft.com> pisze:
> 
> 
>>Is there any way of telling python that the text of the dialogues is in a
>>specific language?
>>And in affirmative case. How is it made? since all the attempts have been
>>useless.
>>I think that wxLocale has to be used, but I do not become clear.
> 
> 
> loc = wx.Locale()
> loc.Init(wx.LANGUAGE_POLISH)
> 
> Et voila, your program uses Polish dialogs.
> 
And if you want to internationalize your OWN dialogs:

http://wiki.wxpython.org/index.cgi/Internationalization

Brian



From jsbenson at bensonsystems.com  Wed Jan 14 16:04:53 2004
From: jsbenson at bensonsystems.com (John Benson)
Date: Wed, 14 Jan 2004 13:04:53 -0800
Subject: Lua versus C++ for embedded processor
Message-ID: <024101c3dae2$0e68d040$8d09500a@jsbwxp3>

Regarding the message appended below: I was in a similar situation, only I
had 4 "small" (RAM-wise) legacy processors in a fault-tolerant Tandem K100
system. The system came with an old Borland C++ compiler but I didn't want
to become an expert in anachronistic C++ trivia, so I ported Lua
(www.lua.org) using the perfectly serviceable C compiler. Although I still
need to put in library extensions to access the Tandem's Guardian OS API,
Lua came up quick and easy, gave me object-oriented scripting and provided
access to the applicable portion of the C Standard Library.

I've programmed Z-World Z-180-based embedded microcontrollers in their
Dynamic C language, and will be using their products again but I'm seriously
considering porting Lua in via Dynamic C so I can have object-oriented
scripting to facilitate prototyping and systems integration work. Whether it
will work out in this case is not clear yet, but the Tandem port worked
fine. Maybe Lua has a place in your embedded application, if there isn't
enough infrastructure for Python.

As for C++ on microcontrollers, I have absolutely no idea what the pros and
cons are. Any ideas out there on whether C++ is a good fit there?

Message: 5
Date: Wed, 14 Jan 2004 11:16:48 -0500
From: Peter Hansen <peter at engcorp.com>
Subject: Re: I come not to bury C++, but to praise it...
To: python-list at python.org
Message-ID: <40056B70.3E04217B at engcorp.com>
Content-Type: text/plain; charset=us-ascii

Cameron Laird wrote:
>
> I was still fussing with cfront in the early '90s.
> Its era *had* passed by then, though.

And I actually went looking for it again as recently as two years
ago, considering the possibility of using it to allow the use of
C++ code for a small embedded processor which did not have an
available C++ compiler.  I actually don't remember precisely why
we didn't try it out, and I assume we simply got distracted by having
to make things work and forgot to continue the search.

Can it be used as a front-end for such chips, where at best there
are two or three C compilers on the market?

-Peter






From lvrk at yahoo.com  Sun Jan  4 19:00:03 2004
From: lvrk at yahoo.com (Raghav Lagisetty)
Date: 4 Jan 2004 16:00:03 -0800
Subject: Let users execute but not view
References: <bt9o11$7rq$05$1@news.t-online.com>
Message-ID: <a6d3c416.0401041600.3d8e9589@posting.google.com>

Hi Florian,

  Check this link from Python's programming FAQ to create compiled
code from .py files:

http://www.python.org/doc/faq/programming.html#how-do-i-create-a-pyc-file

The "dis" module can be used to disassemble and examine this byte
code. But
creating a .pyc file should suffice your requirements.

-Raghav.

Florian Lindner <Florian.Lindner at xgm.de> wrote in message news:<bt9o11$7rq$05$1 at news.t-online.com>...
> Hi!
> I have a python script which should be executed my normal users but they
> should not be able to view the sourcecode. Setting permissions to x only
> does not help, the python interpreter can not read the file.
> How can I do that?
> Thanks,
> Florian


From paulpaterson at users.sourceforge.net  Wed Jan 28 02:05:13 2004
From: paulpaterson at users.sourceforge.net (Paul Paterson)
Date: Wed, 28 Jan 2004 07:05:13 GMT
Subject: Python on portable storage
References: <slrnc1bj85.lot.bignose-hates-spam@iris.polar.local>
	<mailman.832.1075174501.12720.python-list@python.org>
Message-ID: <JaJRb.1435$ee6.1266@fe2.texas.rr.com>

"Jeff Epler" <jepler at unpythonic.net> wrote in message
news:mailman.832.1075174501.12720.python-list at python.org...
> One idea would be a directory structure that looks like the source tree:
>
> python23/python         # linux executable
> python23/python.exe     # windows executable
> python23/Lib            # shared version of /usr/lib/python2.3
> python23/Lib/site.py    # modify this to add any extra tweaks needed for
>                         # things to work properly (it's loaded very early)
> python23/Lib/plat-linux # linux shared-object modules
> python23/Lib/plat-win32 # win32 shared-object modules
>
> In this setup, you are assuming some set of Linux shared objects, use
> ldd to find out which.  (A script setting LD_LIBRARY_PATH to point at
> necessary libraries before calling python could help here)
>
> If you want to support multiple Unix architectures, make python a
> shell script, and include multiple python.ARCH binaries.  Have the shell
> script determine the architecture, and then exec python.ARCH with
> arguments intact.  This should not affect the way Python determines the
> default sys.path.
>
> I don't know much about windows .dll requirements or how to resolve
> problems there.

I can't add to the Linux part but I have Python23 installed on a USB
keychain drive to run on Windows alone. I just installed using the standard
Windows installer into a Python23 directory on the USB drive. You also need
to make sure Python23.dll ends up in the Python23 directory, probably by
manually copying it. Then to get it all to work properly I have a little
batch file in the root of the USB drive with the following,

---- setup.bat ----
echo Setting Path
path =
%1:\python23;%1\python23\lib;%1:\python23\lib\site-packages;%1:\python23\dll
s
set pythonpath = %1:\python23
---- end ----

When you mount the USB drive you open a command prompt and CD to the root of
the USB and type "setup X" where X is the drive letter assigned to the USB
drive. You can now run Python by just typing "python" at the command prompt.

This works for me. You have to be a bit careful if you already have Python
installed on the machine as sometimes sys.path includes parts of the
existing installation even after you run the batch file. I think this might
be something to do with stuff in the registry.

Hope this helps. It is cool to keep a Python in your pocket.

Paul




From daniels at dsl-only.net  Fri Jan  2 01:01:12 2004
From: daniels at dsl-only.net (sdd)
Date: Thu, 01 Jan 2004 22:01:12 -0800
Subject: NEWBIE: map | zip | list comp
In-Reply-To: <odv9vvgb4aobq4c617k0ju4plat2d81j0o@4ax.com>
References: <odv9vvgb4aobq4c617k0ju4plat2d81j0o@4ax.com>
Message-ID: <3ff514db$1@nntp0.pdx.net>

engsolnom at ipns.com wrote:

> ...
> 
> for char_1 in base_seq:         # Loop thru the set char_1 at a time
>     for char_2 in base_seq:     # Loop thru the seq again for each char_1
>         if char_2 == char_1: continue # Don't march 'A' thru a field of 'A's
>         for ix in range(length):                     # Now march char_2 thru a field of char_1's
>             print (char_1 * length)[:ix] + char_2 + (char_1 * length)[ix:-1]

> which, as you can see, has three nested FOR loops. I played with map, zip and list comps a bit, but
> couldn't figure out how to compress the above code. Am I barking up the wrong Python tree?

I'd think so.  The 3-level nest looks fine (clear) to me.
The things I might change about the above code:

     for char_1 in base_seq:
         copies = char_1 * (length-1)
         for char_2 in base_seq:
             if char_2 != char_1:
                 # For every pair of non-matching characters
                 for ix in range(length):
                     # March char_2 thru a field of char_1's
                     print copies[:ix] + char_2 + copies[ix:]

or:

     for char_1 in base_seq:
         for char_2 in base_seq:
             if char_2 != char_1:
                 # For every pair of non-matching characters
                 for ix in range(length):
                     # March char_2 thru a field of char_1's
                     print char_1 * ix + char_2 + char_1 * (length-1-ix)

The point is to go for clarity, not brevity.  I'd think about
better names than char_1 and char_2, however.


-Scott David Daniels
Scott.Daniels at Acm.Org


From max at alcyone.com  Wed Jan 14 15:03:23 2004
From: max at alcyone.com (Erik Max Francis)
Date: Wed, 14 Jan 2004 12:03:23 -0800
Subject: pulling set of unique values from a list
References: <400551c0$1@baen1673807.greenlnk.net>
Message-ID: <4005A08B.56B4EE9C@alcyone.com>

Ben Davies wrote:

> personally I prefer the dictionary one-liner, but with the second
> iterative
> way it is probably more obvious what the code is doing (and perhaps
> more
> efficient?).

No, the dictionary method is more efficient.  The list-using algorithm
has O(n^2) behavior, whereas the dictionary-using algorithm is only
O(n).

-- 
 __ Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
/  \ San Jose, CA, USA && 37 20 N 121 53 W && &tSftDotIotE
\__/ You can't expect to win unless you know why you lose.
    -- Benjamin Lipson


From kkto at csis.hku.hk  Sun Jan 25 21:14:48 2004
From: kkto at csis.hku.hk (Isaac To)
Date: Mon, 26 Jan 2004 10:14:48 +0800
Subject: xrange not hashable - why not?
References: <20040125144724.GA13741@nl.linux.org>
	<mailman.779.1075076126.12720.python-list@python.org>
Message-ID: <7ifze3sbfr.fsf@enark.csis.hku.hk>

>>>>> "Andrew" == Andrew MacIntyre <andymac at bullseye.apana.org.au> writes:

    >> why is an xrange object not hashable?

    Andrew> xrange() returns an iterator.  iterators seem universally
    Andrew> unhashable, probably because they can't be deemed "concrete",
    Andrew> though I can't find anything in the 2.3.3 docs about this -
    Andrew> perhaps the relevant PEPs might.

xrange's are hashable in Python 2.3.

    >> I was trying to do something like:
    >> 
    >> comments = { xrange(0, 4): "Few", xrange(4, 10): "Several",
    >> xrange(10, 100): "A lot", xrange(100, sys.maxint): "Can't count
    >> them"} for (k, v) in comments.items(): if n in k: commentaar = v
    >> break

    Andrew> Even if it worked, there's a nasty performance trap in the
    Andrew> sys.maxint case: if the sys.maxint case is the first returned by
    Andrew> the items() method call and n < 100, the "in" will evaluate the
    Andrew> sys.maxint xrange iterator.

I used to think that the code won't work at all.  I think xrange works like
generators.  If that is the case, the state stored within the xrange in the
dict will cause the whole thing to fail if the same range is used the second
time.  E.g.,

>>> def yrange(x,y):
...     ret = x   
...     while ret < y:
...         yield ret
...         ret += 1
... 
>>> for a in yrange(1,5):
...     print a
... 
1
2
3
4
>>> comments = {
...     yrange(0, 4): "Few",
...     yrange(4,10): "Several",
...     yrange(10,100): "A lot",
...     yrange(100, sys.maxint): "Can't count them"}
>>> for (k,v) in comments.items():
...     if 1 in k:
...         print v
...         break
... 
Few
>>> for (k,v) in comments.items():
...     if 1 in k:
...         print v
...         break
... (type interrupt here after waiting for some time)
Traceback (most recent call last):
  File "<stdin>", line 2, in ?
  File "<stdin>", line 5, in yrange
KeyboardInterrupt

But for xrange this is not the case:

>>> comments = {
...     xrange(0, 4): "Few",
...     xrange(4, 10): "Several",
...     xrange(10, 100): "A lot",
...     xrange(100, sys.maxint): "Can't count them"}
>>> for (k,v) in comments.items():
...     if 1 in k:
...         print v
...         break
... 
Few
>>> for (k,v) in comments.items():
...     if 1 in k:
...         print v
...         break
... 
Few

So xrange is not just an iterator.  On the other hand, things like 1000000
in xrange(1,sys.maxint) really needs a long time to compute.  That makes me
wonder how xrange's are actually implemented.

Regards,
Isaac.


From ryan.scott at sympatico.ca  Tue Jan 20 21:54:02 2004
From: ryan.scott at sympatico.ca (Ryan Scott)
Date: Tue, 20 Jan 2004 21:54:02 -0500
Subject: PyTime Object and Application Crashing
Message-ID: <9RlPb.13768$U77.890295@news20.bellglobal.com>

Hi,

When I run a query against an access database and the default date for 
my date/time field is 12/30/1899 the application crashes. Changing this 
to a different date like 03/03/2003 works.
The output of the query when returned as a list is as follows:

[571, u'DE8', <PyTime:10/2/2003 12:00:00 AM>, <PyTime:12/30/1899 1:05:51 
PM>, 0.
079999998211860657, u'1 -  Litter in sample', u'', False, 10.0, 0.0]

When I try to print item 4 (list[3]) of the list, the application stops 
and I get a "Send Error Report" in Windows XP.

I am using python 2.3.3 and the win32all-163 extension.

Thanks
Ryan



From robin at jessikat.fsnet.co.uk  Sat Jan 10 06:17:11 2004
From: robin at jessikat.fsnet.co.uk (Robin Becker)
Date: Sat, 10 Jan 2004 11:17:11 +0000
Subject: Twisted or Medusa or Zope
References: <425cc8d1.0401070808.14690325@posting.google.com>
	<y11Lb.1333$Mb5.23891@news2.e.nsc.no> <3FFD7159.55630AE0@engcorp.com>
	<6AlLb.134$hd.7718@news2.e.nsc.no> <3FFEB6D6.BF92551E@engcorp.com>
	<+vXesJAXsr$$EwJL@jessikat.fsnet.co.uk> <3FFEBE42.80962511@engcorp.com>
	<h3duvvoc7k93ucntc7j5fo1q4hd7306je3@4ax.com>
Message-ID: <u5f6pLA389$$EwqG@jessikat.fsnet.co.uk>

In article <h3duvvoc7k93ucntc7j5fo1q4hd7306je3 at 4ax.com>, Jane Doe
<jane.doe at acme.com> writes
>On Fri, 09 Jan 2004 09:44:18 -0500, Peter Hansen <peter at engcorp.com>
>wrote:
>>I get at least a temporary "server not found" error when I try that name.
>
>http://snakelets.sourceforge.org/
>
>("We're Sorry. The SourceForge.net Website is currently down for
>maintenance. We will be back shortly) :-)
>
>JD.
whoops, my bad :(
-- 
Robin Becker


From tim.one at comcast.net  Tue Jan 13 22:35:31 2004
From: tim.one at comcast.net (Tim Peters)
Date: Tue, 13 Jan 2004 22:35:31 -0500
Subject: Databases: Which one's right for me?
In-Reply-To: <9a6d7d9d.0401131633.31ee5a60@posting.google.com>
Message-ID: <LNBBLJKPBEHFEDALKOLCGEJMIFAB.tim.one@comcast.net>

[Aaron Watters]
> Alright, just for yucks.
> Total blood supply must be kept above 50 except during emergencies.
> Two transactions notice that there are 40 in bin 1 and 40 in bin two,
> so one takes 30 units from bin 1 and the other takes 30 units from
> bin 2.

If you want to do this with ZODB, the first thing I'd recommend is that you
simply refrain from writing your app to perform concurrent transactions.
The "I" in ACID you're on about here works the way you want it to then.
BTW, unless you're also using ZEO, you can't open a ZODB database in more
than one process at a time, so it takes some work on your part for
concurrent transactions to be possible.

If this is the only blood supply in the country, thousands of hospitals hook
up to it over the net, and you need the performance true concurrency can
provide, then you've got more work to do.

Easiest would probably be to treat it like your checking-account example,
adding a member to the "blood supply" class recording total units of blood
on hand.  Then it's exactly like your checking-account example, and the same
strategies apply (meaning you'll get a ConflictError on all but the first to
commit of a batch of concurrent transactions trying to withdraw blood, and,
if it's not good enough for your performance needs to retry failing
transactions, you can go on to supply a conflict resolution method that
suppresses the ConflictError whenever the total remaining exceeds 50 units;
then the only transactions that fail would be those that truly require
dropping the total to <= 50 units).  I'll note here that ZODB holds Python
objects of arbitrary user-defined classes, so the idea of adding class
invariants is quite natural.

> Or even return to the original problem assuming that the balance
> doesn't change but the debits are entered as separate journal
> entries, where the current balance is computed on the fly as the old
> balance less withdrawals...

You can figure this out on your own, if you want to use ZODB to solve it.

> Sorry, I just don't know when to shut up, I know.  But when I see
> ACID I assume these things are not a problem.

No matter how often the world disappoints you <0.9 wink>?

> ps: Tim anticipated this reply in his post somewhat, but wasn't
>   concrete enough for my taste.

I'm not a DB expert -- I don't even talk the talk.  If you want to
accomplish something with ZODB, though, I can usually help (if only by
reminding you of the zodb-dev list, where you're conspicuous by absence
<wink>).




From spam_no_thx_ei0stjo at chl.chalmers.se  Mon Jan  5 10:49:56 2004
From: spam_no_thx_ei0stjo at chl.chalmers.se (Jonas)
Date: Mon, 05 Jan 2004 16:49:56 +0100
Subject: problem with async chat client in windows
In-Reply-To: <mailman.89.1073274400.12720.python-list@python.org>
References: <btagiv$91o$1@news.gu.se>
	<mailman.89.1073274400.12720.python-list@python.org>
Message-ID: <btc129$vgu$1@news.gu.se>

Jp Calderone wrote:
> On Mon, Jan 05, 2004 at 03:02:29AM +0100, Jonas wrote:
> 
>>Hi,
>>I'm writing a small chat client to learn some python and networking. No 
>>problem with the network stuff tho, the problem is when the user should be 
>>able to interact and type messages to send. Since I work with windows I 
>>can't use the select function 
> 
> 
>   Why not?  select works perfectly well on Windows.
> 
>   See http://www.twistedmatrix.com/
> 
>   Jp
> 

Well the standard library select doesn't work for file descriptors like stdin on 
windows and I didn't know about Twisted. Anyway there must be some way to solve 
this without the need for extra depencencies??


From engsolnorm at ipns.com  Mon Jan 26 01:08:05 2004
From: engsolnorm at ipns.com (engsol)
Date: Sun, 25 Jan 2004 22:08:05 -0800
Subject: delta time = time stop - time start
Message-ID: <cs9910pcgktdrp1e8abctoptue7braqvqu@4ax.com>


I'm using Python to parse a bunch of s/w test files and make csv files for later report generation by MS ACCESS....(my boss
loves the quick turn-around compared to C). Each log file may contain one or more 'sessions', and each session may contain
one or more 'nodes'.

Each session in the log has an ASCII  start and stop time, as does each node.
I have the basic parse part done for parameters, errors, etc., but noticed my routine for determining how long each
session/node took (delta time) was a bit repetitive, so decided to make a 'stand-alone' routine to handle this.

The time format from the log is in the format of:
hh:mm:ss
and is a string with leading zeros where appropiate. Date is never a factor. The longest "delta" is maybe 5 hours.

The routine I came up with is below, but seems a bit clunky.
Is there a better way of doing this? I think it relies too much on integers rounding off in the proper direction, a la
d_time_hr = d_time / 3600 below.

Also, this will have to transition to Linux, if that makes a difference.

START CODE:

import string

def deltatime(start, stop):

    t_start = (string.atoi(start[0:2]) * 3600) + (string.atoi(start[3:5]) * 60) + string.atoi(start[6:8])
    t_stop  = (string.atoi(stop [0:2]) * 3600) + (string.atoi(stop [3:5]) * 60) + string.atoi(stop [6:8])

    if t_start < t_stop:
        d_time = t_stop - t_start
    else:
        d_time = (86400 - t_start) + t_stop

    d_time_hr  =  d_time / 3600
    d_time_min = (d_time - d_time_hr * 3600) / 60
    d_time_sec = (d_time - d_time_hr * 3600) - (d_time_min * 60)

    return str(d_time_hr) + 'hr ' + str(d_time_min) + 'min ' + str(d_time_sec) + 'sec'

END CODE

TRY IT

print deltatime('23:45:00', '02:55:03')

RETURNS

3hr 10min 3sec

Thanks.....Norm
PS Please reply via email (engsolnorm at hotmail.com) until my ISP gets fixed.




From seanl at chaosring.org  Tue Jan  6 02:04:47 2004
From: seanl at chaosring.org (Sean R. Lynch)
Date: Mon, 05 Jan 2004 23:04:47 -0800
Subject: Creating a capabilities-based restricted execution system
In-Reply-To: <e-qcnQCPnLwyZGWiXTWc-w@speakeasy.net>
References: <LmmdnUn4seDeGWuiXTWc-w@speakeasy.net> <bt788l$1pej$1@nadya.doma>
	<d7ycncKp5rket2qiXTWc-g@speakeasy.net> <bt7i9i$236v$1@nadya.doma>
	<srudnTjvU9BOH2qiRVn-uA@speakeasy.net> <bta3hv$17s1$1@nadya.doma>
	<mvScnSDrma66AWWiXTWc-g@speakeasy.net> <btaakg$1dul$1@nadya.doma>
	<e-qcnQCPnLwyZGWiXTWc-w@speakeasy.net>
Message-ID: <Gt6dnecx87CNw2eiXTWc-g@speakeasy.net>

Ok, so how do I handle overriding methods?

Allowing code that inherits from a class to override any method it can 
access could result in security problems if the parent doesn't expect a 
given method to be overridden. Shadowing the overridden method could 
result in unexpected behavior. And, of course, in some cases, we *want* 
to allow the programmer to override methods, because this is what code 
reuse is all about.

I already have a solution in mind for __init__: provide another method 
that is always called on every superclass for any object that is created 
from a class that inherits from that superclass. The method takes no 
arguments and is called after __init__.

Another option is to simply not provide any protection from inheriting 
classes. The more I think about it, the better this sounds. Classes 
don't contain any data other than perhaps class data, and a programmer 
shouldn't be allowing another programmer to subclass classes that 
contain data they want to protect. I could put all attributes back to 
being protected (rather than private) by default, and only have a single 
extra declaration required in a class statement to declare what 
attributes you want to make public.

Can anyone (Serge?) think of an example of a case where this might cause 
leaks or privilege escalation? Remember that classes are opaque, so code 
can't get at unbound methods. Subclassing a class doesn't give you any 
special access to members of that class.


From gnari at simnet.is  Sun Jan 25 07:20:54 2004
From: gnari at simnet.is (gnari)
Date: Sun, 25 Jan 2004 12:20:54 -0000
Subject: perl bug File::Basename and Perl's nature
References: <7fe97cc4.0401242131.22acf485@posting.google.com>
Message-ID: <bv0cgo$5oo$1@news.simnet.is>

"Xah Lee" <xah at xahlee.org> wrote in message
news:7fe97cc4.0401242131.22acf485 at posting.google.com...
> Just bumped into another irresponsibility in perl.
>
[snipped rand about File::Basename docs]

> ...
> Why the fuck do i need to know what is version, or examination what??
> Not every morons in this world is using unix with its morinic
> convention of appending things to file names as a versioning system,
> and not every moron in this world need to "exam" things.

you are right. the docs do not seem to address the
needs of morons. there sould be a shorter version of
the docs, specially for morons, with each example
if larger font, repeated 10 times.

> To the rookie programers out there, i advice against learning Perl.
> (i suggest Python instead) Please see
>  http://xahlee.org/UnixResource_dir/perlr.html

thank you

gnari






From tim at lesher.ws  Mon Jan 19 11:45:45 2004
From: tim at lesher.ws (Tim Lesher)
Date: 19 Jan 2004 08:45:45 -0800
Subject: A lazy-committing database object with curry?
Message-ID: <b6562547.0401190845.6832a797@posting.google.com>

I'm writing a database helper class that represents records in a SQL
database as objects.  I want to be able to instantiate the objects
(from the database), play with their values locally, then lazily
commit the changes all at once (via an explicit commit call).  Other
than the call to Commit(), I don't want clients of this class to have
to think about the fact that there's a database behind it all--there are
some interesting and non-obvious dependencies on the particular values 
that are committed together, and I want to hide that in the Commit() call.

I'm going to have a number of these, so I wanted to come up with a
solution that's short on glue code and can easily be aggregated into
all the classes that represent record types.  This is what I've come
up with:

# Simple currying class, no kwargs
class curry:
    def __init__(self, fun, *args):
        self.fun = fun
        self.pending = args[:]
    def __call__(self, *args):
        return self.fun(*(self.pending + args))

        
# Simple table:  two columns, "title" and "description"
class SomeRecordType(object):
    def __init__(self, title, description):
        self.__modifications = {}

        # Avoid triggering propset on init
        self.__dict__['title'] = title
        self.__dict__['description'] = description

    def __getValue(name, self):
        try:
            return self.__modifications[name]
        except KeyError:
            return self.__dict__[name]

    def __setValue(name, self, newValue):
        self.modifications[name] = newValue

    name = property(curry(__getValue, 'title'),
                    curry(__setValue, 'title'))
    description = property(curry(__getValue, 'description'),
			   curry(__setValue, 'description'))

    def Commit(self):
        if self.modifications != {}:
            # - snip - Do database commit and clear modifications
            self.__dict__.update(self.modifications)
            self.modifications = {}

So I can do this:

foo = myDb.LookupTitleRecord('some title')
print foo.description    # 'foo'
foo.description = 'bar'  # not updated in the DB yet
print foo.description    # 'bar'
foo.Commit()             # now updated in the DB


Are there any pitfalls to doing this?  Am I being dazzled by the shiny
new toy that is currying?  Is there another simple solution, or a
refinement of this one, that I'm not seeing?

Thanks.

-- 
Tim Lesher
<tim at lesher.ws>


From martin at v.loewis.de  Sun Jan  4 15:30:49 2004
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 04 Jan 2004 21:30:49 +0100
Subject: codecs packages?
In-Reply-To: <ef08387c.0401041215.453fd308@posting.google.com>
References: <ef08387c.0401041215.453fd308@posting.google.com>
Message-ID: <bt9t5m$q7t$07$1@news.t-online.com>

Fortepianissimo wrote:
> I'd like to decode some email headers into unicode, including some
> Asian DBCS. I've searched several places and they pointed to the
> Python Codecs project @ SF
> (http://sourceforge.net/projects/python-codecs/), but I couldn't find
> anything there. Could someone give me a pointer to any related
> library?

I recommend to use the cjkcodecs package, at

http://cjkpython.i18n.org/#CJKCodecs

(atleast, it ought to be there - cjkcodecs appears to change
its home page with each release).

Regards,
Martin



From ville.spamstermeister.vainio at thisisspamprotectiontut.finland  Mon Jan 12 11:21:05 2004
From: ville.spamstermeister.vainio at thisisspamprotectiontut.finland (Ville Vainio)
Date: 12 Jan 2004 18:21:05 +0200
Subject: Why learn Python ??
References: <40029dad$0$28706$a729d347@news.telepac.pt>
Message-ID: <du765fh2l5a.fsf@amadeus.cc.tut.fi>

>>>>> "Bicho" == Bicho Verde <bichoverde at sapo.pt> writes:

    Bicho> I have now free time and money to do what I want :-) I have
    Bicho> some basic skills in programming (C, Pascal, Macromedia
    Bicho> Actionscript) but don't know exactly what to do in the
    Bicho> world of programming.  And also I don't know exactly why
    Bicho> would I learn Python rather than C#, C++ or Perl. Basicaly

Well, I assume you want to have fun programming, and that kinda rules
out C# and (especially) C++. They don't really have the favourable
effort/gratification ratio of Python. If you want to get something
done, choose Python. If covering your ass if/when your project fails
is more important than actually succeeding, choose more
conservatively, which means Java/C++/C#. Since you are on your own in
this, Python is an excellent choice.

If you choose Perl, you will at some regret your choice and consider
porting the app to Python. You save a lot of time/frustration by not
going there in the first place.

    Bicho> I don't know where to start, if there is much to do or if
    Bicho> it is has it seems and there is software to everything
    Bicho> nowadays and so doesn't make sense to spend time in
    Bicho> learning a programming language.  I just have this idea

There really isn't software to do all those little script-level tasks
you need to do every now and then, so learning Python is still not a
lost cause even if you never get anything bigger done. Also, writing a
Python script is often faster than searching for a program to do the
thing and then learning how to use that program. It's also more fun.

    Bicho> that I would like to contribute to the curve of accelarated
    Bicho> exponential progress (technological singularity),
    Bicho> artificial intelligence and so on. From that point of view
    Bicho> there is much to do... But can I stand for it and where to
    Bicho> start?  Anyone would help me and give me some hints?

Learn Python first, the ease of programming can quite possibly inspire
you to create something interesting.

-- 
Ville Vainio   http://www.students.tut.fi/~vainio24


From irmen at -NOSPAM-REMOVETHIS-xs4all.nl  Mon Jan  5 18:27:06 2004
From: irmen at -NOSPAM-REMOVETHIS-xs4all.nl (Irmen de Jong)
Date: Tue, 06 Jan 2004 00:27:06 +0100
Subject: local interpreter remote machines
In-Reply-To: <3FF9EF41.8040804@hotmail.com>
References: <btcka7$phd$1@solaris.cc.vt.edu>
	<3ff9e4b8$0$318$e4fe514c@news.xs4all.nl>
	<3FF9EF41.8040804@hotmail.com>
Message-ID: <3ff9f2cb$0$324$e4fe514c@news.xs4all.nl>

hokiegal99 wrote:

> Irmen de Jong wrote:
>   [...about Pyro...]
> Thank you, this is exactly what I was looking for!

While Pyro may be of help (I'm sure it will be ;-) you
should not forget that there are many other ways to do
what you want.
For instance, you could also create a simple web server
application on the remote machine that has a page on which
those data about the remote machine are written.
You can then get the data from the web page using the
urllib module.

For really good advice you will have to tell a lot
more about what you want exactly (and how it should work)...

Good luck!

--Irmen


From rainerd at eldwood.com  Tue Jan  6 14:47:26 2004
From: rainerd at eldwood.com (Rainer Deyke)
Date: Tue, 06 Jan 2004 19:47:26 GMT
Subject: looping to define a sequence of functions?
References: <T9EKb.23248$lo3.20297@newsread2.news.pas.earthlink.net>
Message-ID: <ihEKb.766349$Fm2.732789@attbi_s04>

r.e.s. wrote:
> Suppose we want to define ten functions such that the
> nth function of x simply returns x**n. Is there a way
> to avoid explicitly writing ten function def's? (They
> have to be ten distinct functions, not just a single
> one like def f(n,x): return x**n.)

functions = [lambda x, n=n: x**n for n in range(10)]

-or-

class X(object):
  def __init__(self, n):
    self.n = n
  def __call__(self, x):
    return x ** self.n
functions = [X(n) for n in range(10)]

-or-

functions = []
for n in range(10):
  def f(x, n=n):
    return x**n
  functions.append(f)

-or-

def create_function(n):
  def f(x):
    return x**n
  return f
functions = [create_function(n) for n in range(10)]


-- 
Rainer Deyke - rainerd at eldwood.com - http://eldwood.com




From shalabh at gameboard.org  Fri Jan 30 20:26:17 2004
From: shalabh at gameboard.org (Shalabh Chaturvedi)
Date: 30 Jan 2004 17:26:17 -0800
Subject: TCP server as a Windows service using Python?
References: <pan.2004.01.30.00.11.06.642734@spamfree.optushome.com.au>
Message-ID: <c7ec16d1.0401301726.380b7153@posting.google.com>

David Mitchell <djmitchell at spamfree.optushome.com.au> wrote in message news:<pan.2004.01.30.00.11.06.642734 at spamfree.optushome.com.au>...
> Hello group,
> 
> I'm trying to create a TCP server using Python, and I want it to run under
> Windows as a service.
... 
> I can't see how to let the service accept *either* an incoming TCP client
> connection *or* an e.g. "stop service" message.  If someone could point me
> to some sample code, I'd greatly appreciate it - Google hasn't been
> helpful.

An alternative solution might be to split the functionality into two
processes. The Windows service launches a second (TCP server) process,
which it later kills upon being asked to stop.

--
Shalabh


From sprouts at xpress.se  Fri Jan 16 11:05:44 2004
From: sprouts at xpress.se (Mikke Mattsson)
Date: 16 Jan 2004 08:05:44 -0800
Subject: Numeric host name error (socket, win32)
Message-ID: <867a19af.0401160805.74df8a78@posting.google.com>

Does anoyne know how to get the socket-module to resolve numerical hostnames?

The host address is not resolved correctly.

>>> import socket
>>> socket.getaddrinfo("3100",21)
[(2, 2, 17, '', ('0.0.12.28', 21))]

If I ping the computer from a dos-prompt, I get the correct address (192.168.65.3)


From python at hitmedia.com  Fri Jan 30 15:06:42 2004
From: python at hitmedia.com (Python Baby)
Date: Fri, 30 Jan 2004 12:06:42 -0800
Subject: easiest transition for a PHP website to move to Python?
In-Reply-To: <20040130055251.GA9734@mail.hitmedia.com>
References: <20040130055251.GA9734@mail.hitmedia.com>
Message-ID: <20040130200642.GA60408@mail.hitmedia.com>

Thanks for your replies, everyone.  You're right that WebWare looks
cool, but more importantly I'm VERY VERY impressed with Cheetah!
http://www.cheetahtemplate.org/
That has the nicest syntax of any template system I've ever seen!




On Thu, Jan 29, 2004 at 09:52:51PM -0800, I wrote:
> I've got a database-driven website that's written entirely in PHP.
> It's all pretty MVC : NOT embedded little calls inside HTML, but
> rather little controller apps in the webroot that merge data with
> HTML templates on the fly.
> But for various reasons (mostly fun) I want to rewrite it in Python.
> There are so many different approaches, though!  Zope, Twisted,
> mod_python, clearsilver, and all the goodies in standard library.
> What would be the SMOOTHEST TRANSITION for a newbie like me to
> rewrite my PHP+MySQL website to Python?



From paradisejourney at hotmail.com  Tue Jan 20 09:41:54 2004
From: paradisejourney at hotmail.com (aj)
Date: 20 Jan 2004 06:41:54 -0800
Subject: dependent pull downs
Message-ID: <14ba0c0.0401200641.22650fa7@posting.google.com>

hi everyone
i am writing my first web application
i wanna  have dependent (nested) pull-downs that allow the set of
values displayed in one pull-down to be determined by the values
selected in another pull-downs. how can this be done?? can application
framework simplify this.if so which ones??


From premshree_python at yahoo.co.in  Tue Jan 27 08:48:02 2004
From: premshree_python at yahoo.co.in (=?iso-8859-1?q?Premshree=20Pillai?=)
Date: Tue, 27 Jan 2004 13:48:02 +0000 (GMT)
Subject: makeExe.py
In-Reply-To: <40156EC7.27EFC3F6@engcorp.com>
Message-ID: <20040127134802.27165.qmail@web8302.mail.in.yahoo.com>

> if you're interested
> in integrating the
> changes, and maintaining it, I'll forward our own
> script which you can
> pull apart and reuse as required...

I'd be interested in that.


 --- Peter Hansen <peter at engcorp.com> wrote: >
Premshree Pillai wrote:
> > 
> > Wrote a simple Python script that makes life a wee
> bit
> > easier when using py2exe:
> > 
> > """
> > makeExe.py
> > - Simple Python script to automate the creation
> >   of Python executables using py2exe.
> > 
> [snip]
> > fp = open("setup.py","w")
> > temp = """from distutils.core import setup
> > import py2exe
> > setup(name = "%s",
> >      scripts = ["%s"],
> > )""" % (package,fileName)
> > fp.write(temp)
> > fp.close()
> 
> You could save yourself a fair bit of trouble, and
> avoid writing a
> "setup.py" file to the filesystem (possibly
> overwriting an existing
> one which might be important) by just calling the
> setup() method 
> directly yourself.  The only trick is that it checks
> sys.argv[] for
> the "py2exe" argument, so you have to fake that
> first:
> 
> sys.argv[1:] = ['py2exe']
> 
> from distutils.core import setup
> setup(name=package,
>     scripts=[fileName])
> 
> That should do the trick....  if you're interested
> in integrating the
> changes, and maintaining it, I'll forward our own
> script which you can
> pull apart and reuse as required...
> 
> -Peter
> -- 
> http://mail.python.org/mailman/listinfo/python-list 

=====
-Premshree
[http://www.qiksearch.com/]

________________________________________________________________________
Yahoo! India Mobile: Download the latest polyphonic ringtones.
Go to http://in.mobile.yahoo.com



From pinard at iro.umontreal.ca  Thu Jan  1 11:02:18 2004
From: pinard at iro.umontreal.ca (=?iso-8859-1?Q?Fran=E7ois?= Pinard)
Date: Thu, 1 Jan 2004 11:02:18 -0500
Subject: RELEASED: allout-vim 031229
In-Reply-To: <yfsr7ykb8a4.fsf@black132.ex.ac.uk>
References: <mailman.26.1072753109.8134.python-list@python.org>
	<pan.2003.12.31.05.47.10.999283@yahoo.com>
	<mailman.70.1072876780.8134.python-list@python.org>
	<pan.2003.12.31.14.49.29.838030@yahoo.com>
	<mailman.72.1072888283.8134.python-list@python.org>
	<yfsr7ykb8a4.fsf@black132.ex.ac.uk>
Message-ID: <20040101160218.GA4090@titan.progiciels-bpi.ca>

[Alexander Schmolck]
> Fran?ois Pinard <pinard at iro.umontreal.ca> writes:

> > In French, we easily use "formidable" to describe a girl who is
> > wonderfully sympathetic and/or attractive.

> I think sympathetic is another of those false friends :)

Indeed, thanks!!  I just looked it up in a dictionary...

I meant "friendly" or "nice" (yet "nice" is a bit ambiguous).  One may
likely translate French "formidable" with English "fantastic":

   Python is fantastic.
   Python, c'est formidable!

-- 
Fran?ois Pinard   http://www.iro.umontreal.ca/~pinard



From bkelley at wi.mit.edu  Tue Jan 13 09:51:49 2004
From: bkelley at wi.mit.edu (Brian Kelley)
Date: Tue, 13 Jan 2004 09:51:49 -0500
Subject: py2exe, Inno Setup, and tkinter
In-Reply-To: <oet8uabj.fsf@python.net>
References: <mailman.276.1073790578.12720.python-list@python.org>
	<oet8uabj.fsf@python.net>
Message-ID: <400405a0$0$563$b45e6eb0@senator-bedfellow.mit.edu>

Thomas Heller wrote:
> Are you sure your installer reproduces the same directory structure as
> the dist directory has?
> 
The short script I sent reproduces the same directory structures with 
innosetup.

> I would expect the init.tcl in this directory:
> 
> c:/Program Files/shtoom/tcl/tcl8.4/init.tcl
> 
> Thomas

Brian



From newsgroups at jhrothjr.com  Mon Jan  5 18:35:05 2004
From: newsgroups at jhrothjr.com (John Roth)
Date: Mon, 5 Jan 2004 18:35:05 -0500
Subject: PRE-PEP: new Path class
References: <vvivefh35qjv9a@news.supernews.com>
	<mailman.118.1073338659.12720.python-list@python.org>
Message-ID: <vvjt77546230f3@news.supernews.com>


"Mike C. Fletcher" <mcfletch at rogers.com> wrote in message
news:mailman.118.1073338659.12720.python-list at python.org...
> John Roth wrote:
> ...
>
> >1) Should path be a subclass of str?
> >
> >No. Outside of the difficulty of deciding whether it's a
> >subclass of single byte or unicode strings, it's a pure
> >and simple case of Feature Envy. Granted, there will
> >be times a developer wants to use string methods, but
> >the most common operations should be supported directly.
> >
> >
> It's not the methods that make me want to use str/unicode as the base,
> it's the ability to pass the resulting instances to built-in methods
> that explicitly expect/require str/unicode types.  Not sure how many of
> the core functions/libraries still have such requirements, but I'd guess
> it's a few.
>
> That said, I don't mind making path it's own base-class, I just *really*
> want to be able to pass them to path-unaware code without extra coercian
> (otherwise switching a module to *producing* paths instead of raw
> strings will cause the *clients* of that module to break, which is a
> serious problem for rapid adoption).

That's an excellent point, but it begs the question of which
string class it should subclass. Unless it's got some way of
changing its base class depending on the system it's running
on. That, in turn, probably violates the Principle of Least
Astonishment.

> >5) Should == operator be the same as os.path.samefile()?
> >
> >Why not...
> >
> >
> __eq__ sounds about right.  I gather this call goes out to the
> filesystem first, though.  Might be good to first check for absolute
> equality (i.e. the same actual path) before doing that.

I think this has to do with "conceptual integrity." Are we talking
about a path object that happens to have the ability to do file
system operations in appropriate circumstances, or are we talking
about a file system object that includes all of the usual path
manipulations? You seem to be thinking of the first approach,
and I'm thinking of the second. You're beginning to convince me,
though.

> >7) Should the various gettime methods return Datetime
> >objects.
> >
> >Of course.
> >
> >
> What are we doing for Python 2.2 then?  I agree with the principle, but
> we should likely have a fallback when datetime isn't available.

Do we care? If this is going into Python, it will be in 2.4 at the
earliest, with a possible addon to a late 2.3 release. I don't see
it going into 2.2 at all, although a backwards version would
be nice.

> >10) Commonprefix, walk and sameopenfile?
> >
> >Commonprefix should be a string or list method,
> >it doesn't fit here.
> >
> >
> Path commonprefix are different operations from str commonprefix.  Paths
> should only accept entire path-segments (names) as being equal, while
> strings should accept any set of characters:
>
>     '/this/that/those/them'
>     '/this/thatly/those/them'
>
> should see '/this/' as the commonprefix for the paths, not '/this/that'.

Good point if you're thinking of heterogenous collections. If you're
thinking (as I am) that an object can represent a directory, then it
seems like a singularly useless method.

> >walk is a nice function, but it should be redone to
> >use the visitor pattern directly, with different method
> >names for files, directories and whatever else a
> >particular file system has in it's warped little mind.

> Reworking walk is probably a good idea.  I'll let others worry about it,
> as I've re-implemented the functionality so many times for my own code
> that I'm just sick of it :) .

I can understand that. [grin]

> >13) chdir, chmod, etc?
> >
> >No. This has nothing to do with pathname.
> >
> >
> chmod has to do with altering the access mode of a file/directory by
> specifying it's path, no?  Seems like it could readily be a method of
> the path.

Right. I forgot that these are two totally different issues.

> chdir should accept a path, otherwise doesn't seem like it
> should be a method.

If the path object describes a directory, then I'd see
a .chdir() method as useful. Otherwise, it belongs
somewhere else, although I don't have a clue where
at the moment.

>
> Enjoy all,
> Mike

John Roth




From kim at lignus.dk  Fri Jan 23 09:48:49 2004
From: kim at lignus.dk (Kim Petersen)
Date: Fri, 23 Jan 2004 15:48:49 +0100
Subject: Help and optimization hints, anyone?
References: <pan.2004.01.23.10.41.31.93597@lignus.dk>
	<87d69a6e2j.fsf@pobox.com>
Message-ID: <pan.2004.01.23.14.48.47.22980@lignus.dk>

Den Fri, 23 Jan 2004 12:32:04 +0000. skrev John J. Lee:

> Kim Petersen <kim at lignus.dk> writes:
> 
>> I've worked on this table object a bit too long - and seem to have
>> stared too long at the code. Can someone see where it goes wrong in
>> the insertrow function?
> 
> I made a few comments before I realised it was a Tkinter question, so
> no answer, sorry!  Just some style hints.

thx. no problem tho - i should've remembered.
>> 
>> class UserDict:
> 
> Bad name -- UserDict is a standard library module.  In 2.2 or newer,
> you can subclass dict.  In 2.3, you also have the option of
> subclassing UserDict.DictMixin.  If you just want to implement part of
> the maping interface, just call your class something other than
> UserDict -- say SimpleDefaultDictBase.
> 

Actually i was planning to use the standard UserDict
(basically because a class is hashable and dict isn't) - i
got carried away and put some default handling in it as well - but
didn't rename ;-)

> 
> dict is also a bad name -- this is the name of the builtin dictionary
> type, which you've just clobbered (in the local scope).

Hmmm - isn't it called __dict__ ?

>> 
>>    def haskey(self,name): return self.dict.has_key(name)
> 
> Did you really mean to call it that?  The dict interface has a method
> .has_key(), not .haskey().

yup - oversight
> 
> 
>> class Cell(UserDict):
>>    defaults={"width": 0,"height": 0,"text": '',"color": "black","background": "white",
>>             "widgets": None}
> [...]
> 
> Haven't read much further, but it looks like you might be better off
> using attribute access rather than indexing.  In 2.2, use properties.
> Earlier, use __setattr__ / __getattr__ (make sure you read the docs).

this migrated from a regular dict which i had to drop because its
not hashable as mentioned earlier - next step __(get|set)attr__.
> 
> 
> John

-- 
Privat  ==========================  Kim Petersen  ====================  Arbejde
Email kim at vindinggaard.dk  =====  Jens Gr?ns Vej 11  =====  Email kim at lignus.dk
Tlf +45 75 83 15 50  ==============  7100 Vejle  =========  Tlf +45 75 83 15 51
Fax +45 75 83 15 62  =============  DK - Danmark  ========  Fax +45 75 83 15 62



From __peter__ at web.de  Sun Jan 11 14:05:12 2004
From: __peter__ at web.de (Peter Otten)
Date: Sun, 11 Jan 2004 20:05:12 +0100
Subject: Variable Scope 2 -- Thanks for 1.
References: <dcde6f.0401091247.c17b76e@posting.google.com>
	<dcde6f.0401111045.7fc24246@posting.google.com>
Message-ID: <bts6i3$oe2$03$1@news.t-online.com>

Jens Thiede wrote:

> OK, thanks for sorting that out, but what do I replace in the
> following to avoid referancing:
> 
> x = [[0]*5]*5
> x is [[0,0,0,0,0], [0,0,0,0,0], [0,0,0,0,0], [0,0,0,0,0], [0,0,0,0,0]]
> 
> and after
> 
> x[0][0] = 1;
> x is [[1,0,0,0,0], [1,0,0,0,0], [1,0,0,0,0], [1,0,0,0,0], [1,0,0,0,0]]
> 
> is there a shorthand way to avoid referance or do I have to use a loop
> or:
> 
> x = [[0]*5]+[[0]*5]+[[0]*5]+[[0]*5]+[[0]*5]
> 
> which is obviously stupid to try and do when the second cofficiant is
> large or a variable.

>>> x = [[0]*5 for i in range(5)]
>>> x[0][0] = 1
>>> x
[[1, 0, 0, 0, 0], [0, 0, 0, 0, 0], [0, 0, 0, 0, 0], [0, 0, 0, 0, 0], [0, 0,
0, 0, 0]]

or 

>>> y = map(list, [[0]*5]*5)
>>> y[0][0] = 1
>>> y
[[1, 0, 0, 0, 0], [0, 0, 0, 0, 0], [0, 0, 0, 0, 0], [0, 0, 0, 0, 0], [0, 0,
0, 0, 0]]
>>>

Peter



From jeremy at jdyallop.freeserve.co.uk  Thu Jan 15 18:05:01 2004
From: jeremy at jdyallop.freeserve.co.uk (Jeremy Yallop)
Date: 15 Jan 2004 23:05:01 GMT
Subject: Why gmp is not in the standard library?
References: <4f0a9fdb.0401150211.615a7f45@posting.google.com>
	<m3hdyxv1mp.fsf@pc150.maths.bris.ac.uk>
	<4006b54e$0$560$b45e6eb0@senator-bedfellow.mit.edu>
	<mailman.400.1074182344.12720.python-list@python.org>
	<4006f74a$0$567$b45e6eb0@senator-bedfellow.mit.edu>
Message-ID: <slrnc0e74t.c76.jeremy@hehe.cl.cam.ac.uk>

Brian Kelley wrote:
> Skip Montanaro wrote:
>> Bdb's license is not GPL:
>> 
>>     http://www.sleepycat.com/download/oslicense.html
> 
> I stand corrected, it makes perfect sense that the Berkeley DB should be 
> released using the Berkeley license :)  I don't know why I thought 
> otherwise.

It's not the Berkeley licence, but it's not the GPL either, although
it's similar:

     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
    [...]
     * 3. Redistributions in any form must be accompanied by information on
     *    how to obtain complete source code for the DB software and any
     *    accompanying software that uses the DB software.

Note in particular "and any accompanying software".  Previous versions
of BDB were under the Berkeley licence, which is still included below
the Sleepycat licence.

Jeremy.


From webmaster at beyond-thoughts.com  Fri Jan 16 07:05:18 2004
From: webmaster at beyond-thoughts.com (Christoph Becker-Freyseng)
Date: Fri, 16 Jan 2004 13:05:18 +0100
Subject: PEP for new modules (I read PEP 2)
In-Reply-To: <bu84lk$lra$02$1@news.t-online.com>
References: <mailman.419.1074203028.12720.python-list@python.org>
	<bu84lk$lra$02$1@news.t-online.com>
Message-ID: <4007D37E.4050800@beyond-thoughts.com>

Martin v. L?wis wrote:

> Christoph Becker-Freyseng wrote:
>
>> So basically I want to relocate the real Specification, because the 
>> more specific it gets the more it looks like a documentation and the 
>> prePEP grows and grows ...
>>
>>
>> Is this a valid option for a PEP?
>
>
> If you are asking: "Can we have an implementation before we write the 
> PEP?", the answer is "Certainly, yes".
>
> The PEP procedure is designed to avoid wasting efforts in implementing
> ideas that have no chance to ever get accepted to the Python core.
> If this is no concern for you (i.e. you are willing to accept the risk
> of wasting efforts), you can certainly implement the thing, wait for
> user feedback, and then write the PEP. 

So if I do it this way, the PEP will not have to contain all the 
features of such a module but just a link to the documentation, which 
will describe all the classes, functions etc.?

Thank You,
   Christoph Becker-Freyseng






From apardon at forel.vub.ac.be  Fri Jan 23 04:16:10 2004
From: apardon at forel.vub.ac.be (Antoon Pardon)
Date: 23 Jan 2004 09:16:10 GMT
Subject: Ordered dictionary?
References: <leWPb.231$af7.162835@newshog.newsread.com>
	<f7XPb.9179$7D.3428@fe2.texas.rr.com>
Message-ID: <slrnc11piq.etj.apardon@trout.vub.ac.be>

Op 2004-01-22, Paul McGuire schreef <ptmcg at users.sourceforge.net>:
> "Leif K-Brooks" <eurleif at ecritters.biz> wrote in message
> news:leWPb.231$af7.162835 at newshog.newsread.com...
>> I need to associate a string (key) with an integer (value). A dictionary
>> would do the job, except for the fact that it must be ordered. I also
>> need to look up the value for a specific key easily, so a list of tuples
>> wouldn't work.
>>
> If you really need to access the dictionary in sorted key order, is this so
> difficult?
>
>     dKeys = d.keys()
>     dKeys.sort()
>     for k in dKeys:
>         # do stuff with k and d[k], such as:
>         print k, "=", d[k]
>
> Or if you are worried about updates to d between the time of key retrieval
> and time of traversal (for instance, if a separate thread were to delete one
> of the keyed entries), take a snapshot as a list:
>
>     dItems = d.items()   # from here on, you are insulated from changes to
> dictionary 'd'
>     dItems.sort()       # implicitly sorts by key
>     dItems.sort( lambda a,b: a[1]-b[1] )  # sorts by value, if you so prefer
>     for k,v in dItems:
>         # do stuff with k and v, such as:
>         print k, "=", v         # <-- added benefit here of not re-accessing
> the list by key

Well I too sometimes need the keys in a dictionary to be sorted and your
solutions wouldn't help. The problem is the following.

I have a number of key value pairs, like names and telephone numbers.
Just more subject to change.  Now I want the telephone numbers of everyone
whose name starts with "jan".

Or I just inserted a name and want to know who is alphabetically next.
Or I want to know who is first or last.

-- 
Antoon Pardon


From carroll at tjc.com  Sat Jan 24 13:55:54 2004
From: carroll at tjc.com (Terry Carroll)
Date: Sat, 24 Jan 2004 18:55:54 GMT
Subject: time.time()
References: <buubug$rcj$1@solaris.cc.vt.edu>
Message-ID: <7cf510d1k3ug79am8s709ebhar2sspjlm2@4ax.com>

On Sat, 24 Jan 2004 13:01:40 -0500, Bart Nessux <bart_nessux at hotmail.com>
wrote:

>am I doing this wrong:
>
>print (time.time() / 60) / 60	#time.time has been running for many hours
>
>if time.time() was (21600/60) then that would equal 360/60 which would 
>be 6, but I'm not getting 6 so I'm not doing the division right, any tips?

time.time() returns the number of seconds since the epoch.  The epoch is
generally Jan 1, 1970; you can check by trying time.gmtime(0).

You're expecting time.time() to be 21600/60, or, in other words, for
time() to be 1548; but 1548 seconds is only about 25 minutes.  It's been a
little more than 34 years since Jan 1, 1970, so the number you should
expect from time.time() should be in the neighborhood of 34 years * 365.25
days/year * 24 hours/day * 60 min/hour * 60 sec/min = 1072958400.

Trying time.time() directly confirms this:

>>> time.time()
1074969863.888

Yeah, it's not on the nose, but close enough for a sanity check.  By the
way, this is usually a good thing to try when you're lost at sea like this
-- go back to the original input data, in this case, time.time() output,
and see if it's giving you what you expect.

It sounds like you're thinking time.time() does something else, which
you're trying to do.  What is that?  There might be another function for
you.


From barry at barrys-emacs.org  Sun Jan  4 10:16:18 2004
From: barry at barrys-emacs.org (Barry Scott)
Date: Sun, 04 Jan 2004 15:16:18 +0000
Subject: [Python-Dev] PEP 324: popen5 - New POSIX process module
In-Reply-To: <3FF75AFC.3020204@v.loewis.de>
References: <Pine.LNX.4.44.0401032302210.778-100000@aristocat.lysator.liu.se>
	<3FF75AFC.3020204@v.loewis.de>
Message-ID: <6.0.1.1.2.20040104151236.02209ea0@torment.chelsea.private>

At 04-01-2004 00:14, Martin v. Loewis wrote:
>>With popen5, you can do it *without* using the shell.
>
>Why is that a good thing?

Because using the shell on windows is causing a DOS box window to appear for
every popen2/3/4 use in a windowed python program on Windows.

Barry





From jzgoda at gazeta.usun.pl  Fri Jan 16 14:25:18 2004
From: jzgoda at gazeta.usun.pl (Jarek Zgoda)
Date: Fri, 16 Jan 2004 19:25:18 +0000 (UTC)
Subject: [OT] AS/400
References: <mailman.352.1074092092.12720.python-list@python.org>
	<bu4a5n$k9$6@atlantis.news.tpi.pl> <4005cd03@news.mt.net.mk>
	<bu6l68$8uv$1@atlantis.news.tpi.pl>
	<100dtle1tldg730@corp.supernews.com>
Message-ID: <bu9dqu$2nr$2@nemesis.news.tpi.pl>

Cameron Laird <claird at lairds.com> pisze:

>>> Why is it the best minicomputer ever made?
>>> I really want to know!
>>
>>Since nobody ever produced any other. Only IBM produced machines that
>>can be called "midrange" (something between microcomputer and "real
>>computer", the famous S/390 mainframe). They still use this terminology.
> 			.
> 			.
> 			.
> Sneaky, Jarek; but there were a LOT of "minicomputer"
> manufacturers, including DEC, Data General, HP, Prime,
> ...

Oops! It seems I'm too young to make such authoritative statements, my
adventure with computers started in mid-80's. So, please, take my
apologies for inconvenience.

-- 
Jarek Zgoda
Unregistered Linux User #-1
http://www.zgoda.biz/ JID:zgoda-a-chrome.pl http://zgoda.jogger.pl/


From roy at panix.com  Mon Jan 19 20:02:44 2004
From: roy at panix.com (Roy Smith)
Date: Mon, 19 Jan 2004 20:02:44 -0500
Subject: speedy Python strings?
References: <buhtjb$ida$1@news.rz.uni-karlsruhe.de>
Message-ID: <roy-96DC3A.20024419012004@reader2.panix.com>

In article <buhtjb$ida$1 at news.rz.uni-karlsruhe.de>,
 Uwe Mayer <merkosh at hadiko.de> wrote:

> since strings are
> immutable the string operations are so slow.

More to the point, and I suspect what you're running into, string 
addition is linear with respect to string length because it has to 
create a new string each time and destroy the old one.  Since each 
addition is linear with string length, a loop which adds strings will 
run in quadratic time.

Possibly you want to look at the cStringIO class.

Another possibility is to buffer things in a list, using append to add 
to the end and pop(0) to pop off the front (a roll-your-own queue).  
Lists do not suffer from the quadratic behavor that string addition does.


From rajarshi at presidency.com  Wed Jan 14 09:25:28 2004
From: rajarshi at presidency.com (Rajarshi Guha)
Date: Wed, 14 Jan 2004 09:25:28 -0500
Subject: how can I execute a function string
References: <pan.2004.01.13.01.17.27.878470.10201@presidency.com>
	<1006qgl89mmsnf4@corp.supernews.com>
Message-ID: <pan.2004.01.14.14.25.27.782979.16640@presidency.com>

On Mon, 12 Jan 2004 21:23:20 -0500, Francis Avila wrote:

> Rajarshi Guha wrote in message ...
>>Hi ,
>> I have some code that generates a function on the fly in a string.
>>At a later point in time I want to execute this function (which also
>>requires a parameters to be passed to it). So the code is something like
>>this:
[
> If you're very ambitious, you can generate an AST tree and compile that:
> see the compile module.  In this simple case there's no advantage,
> however.
> 
> I'll have to think about how to turn the raw source of a function
> definition into a callable.  I'm not sure it's possible in a 100%
> reliable manner. Here's a first attempt (untested):
> 
> def makecallable(source):
>     """Return a function from string source.
> 
>     'def <funcname>' must be the first tokens in source!
> 
>     """
>     co = compile(source, '<makecallable()>', 'single') funcname =
>     co.co_varnames[0] #This is VERY brittle!! fakelocals = {} exec co in
>     globals(), fakelocals
>     return fakelocals[funcname]
> 

Well I was playing with Andrews curves which allows one to visualize a
vector of numbers in terms of a Fourier series. So basically I was
creating a string that ontained the Fourier representation of the vector
and then evaluating the resultant function.

I know this can be done simpler using loops - I jst wanted to see how I
could do this using a bit of code generation


From jl at windsmith.net  Wed Jan 21 09:10:12 2004
From: jl at windsmith.net (John Lull)
Date: 21 Jan 2004 08:10:12 -0600
Subject: Multithreaded COM server problem...
References: <5a90009ufdd66okc8osajrn1a5kokp86mk@4ax.com>
	<btpug4$1oag$1@arachne.labyrinth.net.au>
	<gdv100hgp4tgnclf0c4a4nlr58npi5q3ir@4ax.com>
	<bttcff$qs1$1@arachne.labyrinth.net.au>
	<0pr700ddfdf3op14oulk7u82cthaped040@4ax.com>
	<bu7h15$2d9k$1@arachne.labyrinth.net.au>
	<et0f005fm32gh5ovq67bd2e9ihalbiaa9m@4ax.com>
	<buhmnr$s6g$1@arachne.labyrinth.net.au>
Message-ID: <9uvs00568u2tb2qp0lndh649d0ajdginkl@4ax.com>

Mark Hammond <mhammond at skippinet.com.au> wrote (with possible
deletions):

> Is there any way you can do it asynchronously?  The main thread spawns a 
> second thread to do the work.  The main thread then spins around a 
> MsgWaitForMultipleObjects, with an object set by the second thread.  The 
> main thread will then be able to run a message pump, but also detect 
> when the second thread is done.

Yes, except there doesn't seem to be any way to return a value from
the first call until after the second call completes.

> Apart from that, I am afraid I am out of ideas.  I believe however that 
> you are hitting pure COM issues, and nothing related to Python.  Looking 
> for the answer beyond the Python world may be fruitful.

The three reasonable possibilities I see at the moment are:

1. Dig into exactly how apartment-threaded servers are supposed to be
written in C or C++ & see how much of that is transferrable to Python.
I'm not confident this would give me a solution, though.

2. Activate the server in 2 steps -- have the main thread create (on
client request) "interlock" object that, when created, fires up a new
thread for the client who created it. The new thread then calls
factory.RegisterClassFactories() for the real worker object, then
starts a message pump. The client then requests COM to create the
worker object. The worker object creation method then calls
factory.RevokeClassFactories() to revoke that thread's registration.
The interlock and worker classes have to coordinate so that only one
worker thread is registered as class factory at any time, and only one
client is able to create the worker object at any time. The main
thread also has to register as class factory only for the interlock
object, not for the worker object. This requires changes to one py2exe
module and to all applications that use my server, and will complicate
shutdown, since I have to shut down the new thread only when all
object's it's pumping messages for are gone. There's also the
substantial possibility that the same bug I ran into when setting
sys.coinit_flags=0 in localserver.py will rear its head here.

3. Dig into why setting sys.coinit_flags=0 in localserver.py doesn't
work. This is probably the right thing to do, both because I know it
will yield a solution, and because it would solve the same issue for
anyone else with similar needs. Unfortunately it means I have to dig
into Python threading internals, pythoncom internals, and the whole
COM mechanism rather more heavily than I'd hoped to.


Regards,
John



From dietrich at zdome.net  Mon Jan 19 17:04:52 2004
From: dietrich at zdome.net (Dietrich Epp)
Date: Mon, 19 Jan 2004 14:04:52 -0800
Subject: Getting a process's output
Message-ID: <82104858-4ACB-11D8-A692-0003934ACDEC@zdome.net>

Is there any easy way to get all the output of a process?  Ideally, the 
function takes parameters like exec(), calls fork(), wait()s for the 
process to complete, and returns the process's stdout, stderr, and exit 
status.  By stdout and stderr I don't mean file objects or 
descriptors... I mean strings containing the entire output.

I would try to do it myself, but I'm not sure how to interleave the 
operations.




From skip at pobox.com  Sat Jan 31 11:00:54 2004
From: skip at pobox.com (Skip Montanaro)
Date: Sat, 31 Jan 2004 10:00:54 -0600
Subject: timeit
In-Reply-To: <16411.52801.42668.236157@montanaro.dyndns.org>
References: <bvfa7b$6jc$1@newsg1.svr.pol.co.uk>
	<16411.52801.42668.236157@montanaro.dyndns.org>
Message-ID: <16411.53558.416804.414405@montanaro.dyndns.org>

>>>>> "Skip" == Skip Montanaro <skip at pobox.com> writes:


    Skip>     tim = timeit.Timer(setup-'import subtract', stmt=s)

Whoops! '-' should of course be '='...

S



From elainejackson7355 at home.com  Sun Jan  4 01:45:46 2004
From: elainejackson7355 at home.com (Elaine Jackson)
Date: Sun, 04 Jan 2004 06:45:46 GMT
Subject: Integer math question
References: <3987e01c.0401030832.114c6f2a@posting.google.com>
Message-ID: <uEOJb.933787$pl3.753391@pd7tw3no>

C rounds toward the nearest integer and Python rounds down. The behavior is
consistent in each case.

"Frank" <mersmann at szut.uni-bremen.de> wrote in message
news:3987e01c.0401030832.114c6f2a at posting.google.com...
| Hi,
|
| can anybody help with the following problem?
|
| In C++
|
| i = 5 / 10 and
| i = -5 / 10 both have the same result 0.
|
| In python
|
| i = 5 / 10 gives me 0 as expected, but
| i = -5 / 10 gives -1 as result.
|
| Is this a feature or a bug? I remember Delphi gave me the same result as
| C++.
|
| TIA,
| Frank




From jepler at unpythonic.net  Mon Jan  5 08:47:54 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Mon, 5 Jan 2004 07:47:54 -0600
Subject: Python/C and PYTHONPATH
In-Reply-To: <btbn3o$5oo$1@ousrvr3.oulu.fi>
References: <btbn3o$5oo$1@ousrvr3.oulu.fi>
Message-ID: <20040105134753.GA5514@unpythonic.net>

You'd need to tell us how you're invoking Python.  When the Python
executable is invoked without arguments, the current directory is on the
sys.path:

$ python
Python 2.2.2 (#1, Feb 24 2003, 19:13:11) 
[GCC 3.2.2 20030222 (Red Hat Linux 3.2.2-4)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> sys.path[0]
''

When you run a script, the directory of that script is in sys.path[0]:
$ echo "import sys; print sys.path[0]" > /tmp/script.py
$ python /tmp/script.py
/tmp

Some Python editors may put the directory where they reside on sys.path,
but not the current directory.  They might do other startup that is
different from normal.  The newest Python I have on this machine
is 2.3b1, and its idle puts these elements at the start of Pythonpath:

Python 2.3b1 (#16, May 19 2003, 10:22:28) 
[GCC 3.2.2 20030222 (Red Hat Linux 3.2.2-5)] on linux2
Type "copyright", "credits" or "license" for more information.
IDLE 0.8 -- press F1 for help
>>> import sys
>>> sys.path[:2]
['/home/jepler', '/usr/local/bin']

... so instead of "the current directory" ('' or '.'), sys.path[0]
is "the directory idle was invoked from", and that's followed by "the
directory where the idle script lives".

Jeff



From jblazi at hotmail.com  Sat Jan 10 16:08:16 2004
From: jblazi at hotmail.com (jblazi)
Date: Sat, 10 Jan 2004 22:08:16 +0100
Subject: Emacs python mode question
Message-ID: <pan.2004.01.10.21.08.16.172000@hotmail.com>

If I should like to go to line 345: how can I do that? Typing M-x
goto-line and then 345 is a bit cumbersome.
I defines the key Alt-g to be goto-line, but it does not work.

TIA,
jb


----== Posted via Newsfeed.Com - Unlimited-Uncensored-Secure Usenet News==----
http://www.newsfeed.com The #1 Newsgroup Service in the World! >100,000 Newsgroups
---= 19 East/West-Coast Specialized Servers - Total Privacy via Encryption =---


From miallen at miallen.com  Sat Jan 17 18:15:20 2004
From: miallen at miallen.com (Michael B Allen)
Date: Sat, 17 Jan 2004 18:15:20 -0500 (EST)
Subject: rfc822.py date parsing problem
Message-ID: <41886.207.172.179.21.1074381320.squirrel@li4-142.members.linode.com>

How can I zoom in on what's going on below?

$ archivemail -n ~/Maildir/.Lists.*
/home/miallen/Maildir/.Lists.CIFS: I would have archived 11 of 29
message(s) in 0.1 seconds
/home/miallen/Maildir/.Lists.Expat: I would have archived 113 of 116
message(s) in 0.3 seconds
/home/miallen/Maildir/.Lists.JCIFS: I would have archived 628 of 1796
message(s) in 4.2 seconds
/home/miallen/Maildir/.Lists.Jarapac: I would have archived 0 of 6
message(s) in 0.0 seconds
/home/miallen/Maildir/.Lists.Libmba: I would have archived 21 of 39
message(s) in 0.1 seconds
/home/miallen/Maildir/.Lists.Linux-UTF8: I would have archived 0 of 190
message(s) in 0.4 seconds
Traceback (most recent call last):
  File "/usr/bin/archivemail", line 968, in ?
    main()
  File "/usr/bin/archivemail", line 550, in main
    archive(mailbox_path)
  File "/usr/bin/archivemail", line 761, in archive
    _archive_dir(mailbox_name, final_archive_name, "maildir")
  File "/usr/bin/archivemail", line 877, in _archive_dir
    if should_archive(msg):
  File "/usr/bin/archivemail", line 674, in should_archive
    time_message = guess_delivery_time(message)
  File "/usr/bin/archivemail", line 613, in guess_delivery_time
    date = message.getdate(header)
  File "/usr/lib/python2.1/rfc822.py", line 362, in getdate
    return parsedate(data)
  File "/usr/lib/python2.1/rfc822.py", line 901, in parsedate
    t = parsedate_tz(data)
  File "/usr/lib/python2.1/rfc822.py", line 826, in parsedate_tz
    if data[0][-1] in (',', '.') or data[0].lower() in _daynames:
IndexError: list index out of range



From hans at zephyrfalcon.org  Tue Jan 27 11:53:13 2004
From: hans at zephyrfalcon.org (Hans Nowak)
Date: Tue, 27 Jan 2004 11:53:13 -0500
Subject: os.path.split: processing paths from one OS on another
In-Reply-To: <401691D7.8050607@holmes.nl>
References: <401691D7.8050607@holmes.nl>
Message-ID: <40169779.6080106@zephyrfalcon.org>

Martijn Ras wrote:
> Heya folks,
> 
> I ran into the following problem:
> 
> When i run this on Windows everything is as expected:
> C:\>python
> Python 2.2.3 (#42, May 30 2003, 18:12:08) [MSC 32 bit (Intel)] on win32
> Type "help", "copyright", "credits" or "license" for more information.
>  >>> import os
>  >>> file='/TEST/FILE.EXT'
>  >>> print os.path.split(file)
> ('/TEST', 'FILE.EXT')
>  >>> file='C:\\TEST\\FILE.EXT'
>  >>> print os.path.split(file)
> ('C:\\TEST', 'FILE.EXT')
> 
> However, when i run this on Linux the results are unexpected:
> $ python
> Python 2.2.3 (#1, Nov 12 2003, 15:53:11)
> [GCC 2.96 20000731 (Red Hat Linux 7.3 2.96-110)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
>  >>> import os
>  >>> file='/TEST/FILE.EXT'
>  >>> print os.path.split(file)
> ('/TEST', 'FILE.EXT')
>  >>> file='C:\\TEST\\FILE.EXT'
>  >>> print os.path.split(file)
> ('', 'C:\\TEST\\FILE')
> 
> All i can find is some comments on POSIX-ness (or not) of the OS, in 
> regard to os.path.split(), but i fail to see why that explains the 
> different outcome of the last command in the two examples above.

os.path is really a portable layer over platform-specific modules.  Try this 
little experiment:

 >>> import os
 >>> os.path
<module 'ntpath' from 'C:\Python23\lib\ntpath.pyc'>
 >>>

On Windows, os.path is really the ntpath module, but on Linux, you'll see 
'posixpath'.  ntpath and posixpath implement platform-specific rules, for 
example, they deal with the path separator used on a given system.

Windows can deal with both slashes and backslashes as separators, but posix 
(apparently) only accepts slashes:

 >>> import ntpath, posixpath
 >>> ntpath.split("c:/foo/bar.txt")
('c:/foo', 'bar.txt')
 >>> ntpath.split("c:\\foo\\bar.txt")
('c:\\foo', 'bar.txt')
 >>> posixpath.split("c:/foo/bar.txt")
('c:/foo', 'bar.txt')
 >>> posixpath.split("c:\\foo\\bar.txt")
('', 'c:\\foo\\bar.txt')

> My server needs to be run on either Linux or Windows, it receives 
> requests from clients that may run either OS. To process those requests 
> i need to split the path and filename. I hoped to solves this using 
> os.path.split (), any suggestions as to how to fix this?

One possible solution is to always use forward slashes for literal paths. 
These should work on both Linux and Windows.  If necessary, you can convert 
backslashes to forward slashes before processing.  It's easy enough:

 >>> string.replace("c:\\foo\\bar.txt", "\\", "/")
'c:/foo/bar.txt'
 >>>

HTH,

-- 
Hans (hans at zephyrfalcon.org)
http://zephyrfalcon.org/





From __peter__ at web.de  Sun Jan 18 19:41:50 2004
From: __peter__ at web.de (Peter Otten)
Date: Mon, 19 Jan 2004 01:41:50 +0100
Subject: Printing variable names
References: <a6d1df44.0401181122.56f1f091@posting.google.com>
	<mailman.479.1074455535.12720.python-list@python.org>
	<a6d1df44.0401181628.6d1e1f86@posting.google.com>
Message-ID: <buf8u7$pk9$03$1@news.t-online.com>

Mike wrote:

> This is what I'm trying to accomplish:
> 
> Basically I have a list of pointers to functions (or whaterver it's called
> in
> Python).  Something like this:
> 
> commands = [func1, func2, ...funcN]
> 
> This is in a script that I use to test an embedded system through the
> comport. I call the script with the command number (func1 etc...), which
> calls the corresponding function, which sends a command to the embedded
> system.
> 
> I'd like to be able to call the script with --help and have it spit out
> the list of commands (the names func1, func2 etc...).

You're lucky, functions "know" their name:

>>> def func1(): pass
...
>>> def func2(): pass
...
>>> for f in [func1, func2]:
...     print f.__name__
...
func1
func2

Peter


From bmgx_no_sp at mgleesonprop.co.za  Thu Jan  8 11:42:35 2004
From: bmgx_no_sp at mgleesonprop.co.za (bmgx)
Date: Thu, 08 Jan 2004 18:42:35 +0200
Subject: creating a daemon?
In-Reply-To: <xqxlloin9lc.fsf@cola2.ca.boeing.com>
References: <3ffd355c.0@news1.mweb.co.za> <xqxlloin9lc.fsf@cola2.ca.boeing.com>
Message-ID: <3ffd886d.0@news1.mweb.co.za>

Yeah ok, "FORK" being the golden word I failed to see at first, got some 
answers @ google groups but the most helpful was this link:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/66012

now to stick those DAEMONS with my fork()! anyone have an os.knife()?

Harry George wrote:
> bmgx <bmgx_no_sp at mgleesonprop.co.za> writes:
> 
> 
>>This is what I am trying to find out, instruction on how to create a
>>simple daemon on unix systems(Linux), can't find any info on usual
>>sources..
>>
> 
> 
> 1. The idea is to fork, clean up all the inheritable stuff like files
>    and environment vars, and then fork again.  The resulting process
>    can then be left running to do the daemon work.  I recall there is
>    a daemon.py module somewhere which does this all for you.  Here are
>    the basics:
> 
> def main(args):
>     #---first fork---
>     try:
>         pid = os.fork()
>         if pid > 0:
>             #---first parent---
>             sys.exit(0)
>     except OSError,e:
>         print >>sys.stderr, "fork #1 failed %d (%s)" % (e.errno,e.strerror)
>         sys.exit(1)
> 
>     
>     #---make a clean process---
>     os.chdir('/')
>     os.setsid()
>     os.umask(000)
>     child_in =open('/dev/null','r')
>     child_out=open('/dev/null','w')
>     os.dup2(child_in.fileno(), sys.stdin.fileno())
>     os.dup2(child_out.fileno(), sys.stdout.fileno())
>     os.dup2(child_out.fileno(), sys.stderr.fileno())
> 
>     #---second fork---
>     try:
>         pid = os.fork()
>         if pid > 0:
>             #---second parent---
>             sys.exit(0)
>     except OSError,e:
>         print >>sys.stderr, "fork #2 failed %d (%s)" % (e.errno,e.strerror)
>         sys.exit(1)
>     
> 
>     #---in clean child---
>     x=MyApp()
>     x.run()
> 
> 
> 2. To talk to that daemon, you can use a) files at known locations, b)
>    pipes (see popen), c) sockets with ad hoc protocols (see asyncchat
>    and SocketServer), d) predefined protocols (see Internet Protocols
>    and Services).  The various "server" modules have the setup code
>    from "1" above builtin, so you can ignore that level of detail.
>    ["see" references can be found in the normal python documentation's
>    Library Reference"].
> 
> 3. Once you have a working daemon, you need a way to start and stop
>    it.  You could manually start it each time you need it and then
>    "kill" it when done.  More commonly you would do it (in Linux and
>    UNIX) via a boot-time initialization script (typically found in
>    /etc/init.d).  Each *NIX has its own flavor of setting these up, so
>    you need to look at existing services and maybe copy-and-edit a
>    working script.  
> 
> 4. If security is an issue (it probably is), you may also want to hide
>    the service behind xinetd.  That is a whole setup story in its own
>    right.  And if security is really troublesome, you may need to
>    assure the python interpreter itself is safe.  That kind of
>    consideration is way out of my league.
> 



From ramen at lackingtalent.com  Fri Jan  9 13:06:10 2004
From: ramen at lackingtalent.com (Dave Benjamin)
Date: Fri, 09 Jan 2004 18:06:10 -0000
Subject: Why " ".some_string is often used ?
References: <Xns94698A5566736stefninnospamyahoofr@213.228.0.4>
	<vvqghojub1dl07@news.supernews.com>
	<WuqdnV9uUeebO2CiRVn-jw@comcast.com>
Message-ID: <slrnbvtrsp.nh1.ramen@lackingtalent.com>

In article <WuqdnV9uUeebO2CiRVn-jw at comcast.com>, Terry Reedy wrote:
> 
> "John Roth" <newsgroups at jhrothjr.com> wrote in message
> news:vvqghojub1dl07 at news.supernews.com...
>> And I agree, it's not entirely obvious why it's a string
>> method rather than a list method,
> 
> Because, as I and others have posted several times in previous threads, and
> explicated with several examples, <str,unicode>.join is NOT, NOT, NOT a
> list method, anymore than it is a tuple, dict, array, generator-iterator,
> or any other iteratable method.  Taking 'string' genericly (as either type
> str or unicode), .join  joins a sequence (iterable) of strings with a
> string.

It's not a list method because it's not a list method or any other kind of
iterable method? That seems like circular reasoning.

Consider the following two pieces of data:

 1. 'the,quick,brown,fox'
 2. ['the', 'quick', 'brown', 'fox']
 
They are both lists of words. Perhaps the first is not a Python-list of
words, but it's a list of words nonetheless. #1 can be converted into #2 by
calling ".split(',')" on it. Doesn't it seem natural that #2 be converted to
#1 by calling ".join(',')"? It works this way in JavaScript and Ruby, at
least.

The argument is more of a technical issue. There are only two kinds of
strings. There are many kinds of "iterables". So, it's easier to define
"join" on the string, and force implementers of custom string types to
implement "join" as well (since this is more rare) than to define "join" on
an iterable and force implementers of the many kinds of iterables to define
"join" as well. Conceptually, I'm not sure that the case is so strong that
"join" is a string method.

In reality, "join" isn't really a string method any more than it's an
iterable method. It's a string-iterable<string> method; it operates on the
relationship between a string and an iterable of strings. If we had a
class that could represent that relationship, "join" would be a method of
that class, ie.:

seq = ['the', 'quick', 'brown', 'fox']
sep = ','

ssi = StringStringIterable(sep, seq)
result = ssi.join()

But this would be somewhat pointless because:

 1. This would be a pain to type.
 2. The class probably wouldn't pull its weight.
 3. The elegance Python has with text processing is lost.

Another solution might be to use a mixin class that provides StringIterable
methods, and have the built-in list include this mixin. Then, you could
always mix it into your own iterable classes if you wanted "join" to be
available. But then, you've still got issues trying to integrate it with
tuples and generators.

Sometimes, object-orientedness gets in the way, and I think this is one of
those cases. "str.join" is probably the winner here, but since it's really
just a string method being used "out of context", the delimeter is the first
argument, and this doesn't read well to me. I think that "string.join" makes
more sense; it says "join this sequence using this delimeter" instead of
str.join's "join using this delimeter this sequence".

>>since it operates on a list, not on a string.
> 
> Huh?  It operates on a sequence of strings.  It has nothing to do with
> lists in particular.  The builtinness and mutability of lists is irrelevant
> to this generic read-only operation.

Only because it is defined as such. Ruby and JavaScript define the "join"
method on built-in arrays. Newcomers to Python who have programmed in those
languages will naturally associate "join" with lists, even though
technically, in the Python world, it's really something associated with
the relationship between a string and an iterable of strings. Which is an
awful lot of semantics to digest when you just want to stick some commas
between words in a list.

-- 
.:[ dave benjamin (ramenboy) -:- www.ramenfest.com -:- www.3dex.com ]:.
: d r i n k i n g   l i f e   o u t   o f   t h e   c o n t a i n e r :


From gerrit at nl.linux.org  Tue Jan  6 14:39:51 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Tue, 6 Jan 2004 20:39:51 +0100
Subject: PRE-PEP: new Path class
In-Reply-To: <3FFA7E82.4020609@beyond-thoughts.com>
References: <vvivefh35qjv9a@news.supernews.com>
	<3FFA7E82.4020609@beyond-thoughts.com>
Message-ID: <20040106193951.GD4581@nl.linux.org>

Christoph Becker-Freyseng wrote:
> [1] I think Path being a subclass of str is odd. There are a lot of 
> string-operations that don't fit to path (some of them should be 
> implemented in a different way e.g. __mul__ if at all).
> However the point with the old os function etc. is very sound. So it 
> might be a good idea to have Path being a subclass of str *for 
> transition*. But finally all those functions should call str(argument) 
> instead of of demanding a str-object as argument (if they don't already 
> today).

Another possibility, which I have put in the Pre-PEP, is;

We can add a method .openwith(), which takes a callable as it's first
argument: p.openwith(f, *args) would result in f(str(p), *args). This
would make p.open(*args) a shorthand for p.openwith(file, args).

What do you think?

> This takes me to my last point:
> What about invalid paths?
> Should Path-Class take care of always being a valid path (this doesn't 
> necessarily mean a path of an existing file/directory)

It may be a good idea to do so. At first, I didn't understand what it
meant, an 'invalid path', but let's define it as anything that triggers
a TypeError when passed to open or listdir. On POSIX, I know only one
case: \0 in path. It may be a lot more difficult on Windows or the Mac.
I'm not sure about this idea yet.

> Especially if someone uses string-methods on a Path-object there could 
> arise invalid paths, even if finaly the path is valid again.

Yes. But I can't really think of a use case for doing operations on a
path which make it invalid. Does it occur in practice?

yours,
Gerrit.

-- 
123. If he turn it over for safe keeping without witness or contract,
and if he to whom it was given deny it, then he has no legitimate claim.
          -- 1780 BC, Hammurabi, Code of Law
-- 
Asperger's Syndrome - a personal approach:
	http://people.nl.linux.org/~gerrit/english/



From tim.golden at viacom-outdoor.co.uk  Tue Jan 20 07:22:32 2004
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Tue, 20 Jan 2004 12:22:32 -0000
Subject: ANN: WMI 0.5
Message-ID: <F1921F85572CB04D9F55B14BDC76B3E443462D@tdi_nt9.internal.viacom-outdoor.co.uk>

***************************
Python WMI Module - CHANGES
***************************

What is it?
===========

The Python WMI module is a lightweight wrapper on top of the win32all
extensions, and hides some of the messy plumbing needed to get Python to
talk to the WMI API. It's pure Python and should work with any version of
Python from 2.1 onwards (list comprehensions) and any recent version of
win32all.


Where do I get it?
==================

http://tgolden.sc.sabren.com/python/wmi.html


What's Changed?
===============

17th Jan 2004 v0.5  
+ Added support for the WMI Registry interface. The new
  module-level Registry method returns a WMI registry
  object whose methods include EnumKeys, CreateValue &c.
  There are a couple of examples in the cookbook.

15th Dec 2003 v0.4  
+ Added machines_in_domain (from a post to python-win32 by "Sean")
+ Factored out moniker construction to make it easier to support
  use of StdRegProv to update registry. (Coming soon).
+ Added support for a timeout on the event watcher; timeout is
  specified in milliseconds and raises x_wmi_timed_out on a
  call to the watcher object. This allows for the possibility
  of pumping for waiting messages to prevent eg, the PythonWin 
  IDE locking up. See the docstring for the watch_for method.
+ Added connect_server function, making it slightly easier to
  construct a WMI object, eg with username and password.

10th Jul 2003 v0.3  
+ Changes by Paul Moore to allow a ready-made WMI Services
  object to be passed in (WMI.__init__).
+ This header and the __VERSION__ number added by Tim G.

9th Jul 2003 v0.2  
+ Sundry changes by Tim G, including but not limited to:
  - support for moniker parts (WMI.__init__)
  - creating new instances of WMI classes (WMI.new)
  - passing return value back from wmi methods (_wmi_method.__call__)
  - better COM error-handling (handle_com_error)

5th Jun 2003 v0.1  
+ Initial release by Tim Golden


________________________________________________________________________
This e-mail has been scanned for all viruses by Star Internet. The
service is powered by MessageLabs. For more information on a proactive
anti-virus service working around the clock, around the globe, visit:
http://www.star.net.uk
________________________________________________________________________



From 2002 at weholt.org  Thu Jan  8 18:21:46 2004
From: 2002 at weholt.org (Thomas Weholt)
Date: Fri, 9 Jan 2004 00:21:46 +0100
Subject: Twisted or Medusa or Zope
References: <425cc8d1.0401070808.14690325@posting.google.com>
	<y11Lb.1333$Mb5.23891@news2.e.nsc.no>
	<3FFD7159.55630AE0@engcorp.com>
Message-ID: <6AlLb.134$hd.7718@news2.e.nsc.no>

"Peter Hansen" <peter at engcorp.com> wrote in message
news:3FFD7159.55630AE0 at engcorp.com...
> Thomas Weholt wrote:
> >
> > My advice ( I got some experience in all of them ) :
> >
> > Medusa is old and you have to do alot yourself. You have to know abit
about
> > HTTP, how async works etc. Get ready to get your hands dirty.
> >
> > Twisted is similar to Medusa, but comes with a bunch of very cool
> > ready-to-use/more-or-less-stable modules which can be combined into
complex
>
> Heh. :-)
>
> Twisted is similar to Medusa in about the same way that Linux is similar
to,
> say, CPM...
>
> -Peter

Ok, my point was that they are similar type of frameworks, if we compare
medusa and the webserver-part of Twisted. They don't do much without a bit
of work/coding. Unlike Zope which comes with a UI, user-management etc
running the minute you finish the installation procedure.

I might not know the entire technical aspect of medusa and twisted, not
really enough to compare them in detail. I was referring to the way a
programmer will have to use them, based on my experience using the two. In
that regard they're somewhat similar and different from zope. If I'm
completly off track here feel free to enlighten me.

Thomas




From mal at lemburg.com  Fri Jan 23 10:54:37 2004
From: mal at lemburg.com (mal)
Date: Fri, 23 Jan 2004 16:54:37 +0100
Subject: ANN: eGenix mxODBC Zope Database Adapter 1.0.8
Message-ID: <401143BD.5070706@lemburg.com>

________________________________________________________________________
ANNOUNCEMENT

                              EGENIX.COM

                      mxODBC Zope Database Adapter

                             Version 1.0.8

                 Available for Zope 2.3 through 2.7 on
                  Windows, Linux, Solaris and FreeBSD

________________________________________________________________________
INTRODUCTION

The eGenix mxODBC Zope Database Adapter (Zope DA) allows you to easily
connect your Zope installation to just about any database backend on
the market today, giving you the reliability of the commercially
supported eGenix.com product mxODBC and the flexibility of the ODBC
standard as middle-tier architecture.

Unlike Zope's ZODBC Zope DA, the mxODBC Zope DA works on Windows
XP/NT/2000/98, Linux, Solaris and FreeBSD using the same interface on
all platforms.

The mxODBC Zope DA implements high performance thread-safe connection
pooling and multiple physical connects per logical Zope
connection. You can safely run Z SQL Methods in parallel, achieving a
much better throughput than ZODBC Zope DA or similar Zope database
adapters under heavy load.

This makes it ideal for deployment in ZEO Clusters and Zope hosting
environments where stability and high performance are a top priority.

________________________________________________________________________
FEATURES

* Zope Level 3 Database Adapter: the mxODBC Zope DA is fully
   multi-threaded and can handle multiple connections to multiple
   databases.

* Fully compatible to Z SQL Methods.

* Drop-in compatible to the ZODBC DA: the mxODBC Zope DA provides the
   same interfaces as Zope's ZODBC DA to allow a smooth upgrade path
   from this simplistic adapater to the high performance mxODBC Zope
   DA.

* Fully compatible to the Znolk SQL Wizard Product and other similar
   products relying on the common database schema access methods
   .tables() and .columns().

* Connection Pooling: physical database connections are pooled and
   kept open, to reduce the connection overhead to a minimum.  This is
   especially important for high latency database connections and ones
   like Oracle which take a considerable amount of time to setup

* Parallel Execution of Queries on a single logical connection: the
   mxODBC Zope DA can manage any number of physical connections on a
   single logical connection. This enables running truly parallel Z SQL
   Method queries -- a feature not available in other Zope DAs.

* Robust Mode of Operation: connections which have timed out or go
   away due to network problems are automatically reconnected.

* Cross-platform Connection Objects: The Zope DA will automatically
   choose the right platform specific ODBC manager for you.

* Per Connection Adjustable ODBC Interface: mxODBC comes with many
   different subpackages to choose from on Unix. The Zope DA allows you
   to select these subpackages on a per-connection basis.

* Per Connection Error Handling: you can tell each connection whether
   it should report ODBC warnings or not; furthermore all warnings and
   errors are made available as list .messages on the DatabaseConnection
   object.

* Transaction safe automatic reconnect: when the DA finds that a
   connection has timed out, it automatically tries a reconnect
   and replays the transaction on the connection (unlike other DAs
   which break the transaction scheme by doing a reconnect without
   replay).

* Built-in Schema Cache: this results in improved performance under
   heavy load.

* Database Schema Access: all ODBC catalog methods are made available
   for much better database schema inquiry. The catalog methods allow
   building generic database interrogation or manipulation tools and
   facilitates writing database independent Zope products.

* Lazy Connect: the mxODBC Zope DA only connects to the database
   backends when a connection is actually requested. This results in a
   better use of resources compared to other Zope DAs.

________________________________________________________________________
NEWS

Version 1.0.8 includes the following changes and enhancements:

* Zope 2.7.0 and Python 2.3 are fully supported on all
   platforms: Windows, Linux, Solaris and FreeBSD.

* You can let the mxODBC Zope DA return empty strings instead of
   None for SQL NULL values. This should simplify porting existing
   applications to the mxODBC Zope DA.

* The included mxODBC 2.1 provides full Unicode support
   if accessed directly. Using e.g. the EasySoft ODBC-ODBC bridge
   this allows you to connect to any remote Unicode aware
   ODBC backend from any of the supported platforms.

In short: mxODBC Zope DA is continuing to become the number one
solution for integrating relational databases with Zope applications.

________________________________________________________________________
UPGRADING

If you have already bought mxODBC Zope DA licenses, you can use these
license for the updated version as well. There is no need to buy new
licenses. The same is true for evaluation license users.

________________________________________________________________________
MORE INFORMATION

For more information on the mxODBC Zope DA, licensing and download
instructions, please visit our web-site:

     http://zope.egenix.com/

You can buy mxODBC Zope DA licenses online from the eGenix.com shop at:

     http://shop.egenix.com/

________________________________________________________________________

Thank you,
-- 
Marc-Andre Lemburg
eGenix.com

Professional Python Services directly from the Source  (#1, Jan 23 2004)
>>> Python/Zope Consulting and Support ...        http://www.egenix.com/
>>> mxODBC.Zope.Database.Adapter ...             http://zope.egenix.com/
>>> mxODBC, mxDateTime, mxTextTools ...        http://python.egenix.com/
________________________________________________________________________

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





From davecook at nowhere.net  Sat Jan  3 15:42:14 2004
From: davecook at nowhere.net (David M. Cook)
Date: Sat, 03 Jan 2004 20:42:14 GMT
Subject: mysql python Newbie Question
References: <vvc80lb8mstue1@corp.supernews.com>
Message-ID: <slrnbvea97.33b.davecook@localhost.localdomain>

In article <vvc80lb8mstue1 at corp.supernews.com>, Andrew wrote:

> Hi I would like to create a program that accesses mysql from a gui on my
> local computer "mysql is on a server"
> 
> but I am fairly new to python and programming GUI's in general
> 
> What I would like this program to do is be able to access my server and
> change update add and delete records from my databases without having to
> write sql.

You might give an object-relation mapper like SQLObject or MiddleKit a try.  

http://www.thinkware.se/cgi-bin/thinki.cgi/ObjectRelationalMappersForPython

However, SQL is easy to learn and is very useful since you still may need to
tweek the schemas that these ORMs produce for you.  

Also, SQLObject seems quite slow, though maybe I'm just using it wrong.  

It should also be said that SQL is simply one of those things that
programmers are expected to know.

Another option is MetaKit, which is procedural as opposed to descriptive, e.g.

SQL: select * from person p, address a where p.person_id=a.person_id;

MK: vw = person.join(address, person_id)

Dave Cook


From bignose-hates-spam at and-benfinney-does-too.id.au  Tue Jan 20 19:30:50 2004
From: bignose-hates-spam at and-benfinney-does-too.id.au (Ben Finney)
Date: 21 Jan 2004 11:20:50 +1050
Subject: regular expression question
References: <slrnc0rifk.d0s.grey@dmiyu.org>
Message-ID: <slrnc0rj7a.mg5.bignose-hates-spam@iris.polar.local>

On Wed, 21 Jan 2004 00:38:12 -0000, Steve Lamb wrote:
> import re
> line = 'match this'
> foo = re.search(r'.*(this)', line)
> foo.groups()[0]

    >>> import re
    >>> line = 'match this'
    >>> foo = re.search( r'.*(this)', line )
    >>> foo.groups()
    ('this',)
    >>> foo.group(0)
    'match this'
    >>> foo.group(1)
    'this'

Read more on the methods available from a MatchObject:

    <http://www.python.org/doc/lib/match-objects.html>

-- 
 \       "The man who is denied the opportunity of taking decisions of |
  `\      importance begins to regard as important the decisions he is |
_o__)                     allowed to take."  -- C. Northcote Parkinson |
Ben Finney <http://bignose.squidly.org/>


From eric.brunel at N0SP4M.com  Fri Jan 16 04:21:48 2004
From: eric.brunel at N0SP4M.com (Eric Brunel)
Date: Fri, 16 Jan 2004 10:21:48 +0100
Subject: wxPython worries
References: <mailman.352.1074092092.12720.python-list@python.org>
	<92c59a2c.0401152257.5b93167b@posting.google.com>
Message-ID: <bu8a00$7jb$1@news-reader1.wanadoo.fr>

MetalOne wrote:
[snip]
> Tkinter has issues here
> also.  There is no means for a worker thread to put an event in the
> GUI thread.

We've successively used the event_generate method on Tkinter widgets from worker 
threads to communicate with the main thread. You can also have less 
straightforward solutions involving the main thread regularly checking for a 
Queue or Event (using the after method) to get events from the worker threads. 
So you definitely can't say there's "no means" to do it. But it's clearly not as 
easy as it should.

[snip]
> Tkinter is also giving me problems.  I have been trying to add
> controls to a canvas and to have a scrollbar that will scroll the
> controls on the canvas.  I think I have it figured out now, but it is
> damn near impossible to figure out from the documentation.  I had to
> scour the internet looking for solutions.

The documentation is clearly the main problem with Tkinter. It's not really that 
there's not enough, but useful information must be gathered from too many places...

The best places are:
- For beginners, "Thinking in Tkinter" from Stephen Ferg: 
http://www.ferg.org/thinking_in_tkinter/index.html
- Tkinter demos in the Python distribution: unfortunately one of Tkinter's best 
kept secrets. Just go to <Python root>/Demo/tkinter and look at the scripts. 
I've learnt a lot from them, even if they're far from perfect (where on earth 
did they get the idea to make all their application inherit from Frame?!)
- "An introduction to Tkinter" from Fredrik Lundh: 
http://www.pythonware.com/library/tkinter/introduction/index.htm - very useful, 
but unfortunately incomplete...
- And finally the man pages for tcl/tk: http://www.tcl.tk/man/ - only useful 
once you've practiced a bit, since you must know how to translate tcl/tk to 
Python/Tkinter to be able to use it.

The book "Python and Tkinter programming" from John Grayson seems interesting, 
but I never used it myself. You can get an idea of its contents and download the 
example scripts here: http://www.manning.com/grayson/

HTH
-- 
- Eric Brunel <eric dot brunel at pragmadev dot com> -
PragmaDev : Real Time Software Development Tools - http://www.pragmadev.com



From jepler at unpythonic.net  Sat Jan 24 14:01:19 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Sat, 24 Jan 2004 13:01:19 -0600
Subject: time.time()
In-Reply-To: <buubug$rcj$1@solaris.cc.vt.edu>
References: <buubug$rcj$1@solaris.cc.vt.edu>
Message-ID: <20040124190119.GF32445@unpythonic.net>

time.time() returns seconds since a particular time in the past ("the
Epoch"), not seconds since program start or anything like that.


>>> import time
>>> help(time.time)

Help on built-in function time:

time(...)
    time() -> floating point number
    
    Return the current time in seconds since the Epoch.
    Fractions of a second may be present if the system clock provides them.




From rainerd at eldwood.com  Sun Jan 11 01:46:50 2004
From: rainerd at eldwood.com (Rainer Deyke)
Date: Sun, 11 Jan 2004 06:46:50 GMT
Subject: Python is far from a top performer according to benchmark
	test...
References: <ryELb.238$tK2.228@amstwist00> <btn5db$2f8$1@absinth.dialog.net.pl>
	<pan.2004.01.09.21.35.40.132608@yahoo.com>
	<6ee58e07.0401092129.302cb9d4@posting.google.com>
	<pan.2004.01.11.06.08.18.867825@yahoo.com>
Message-ID: <uj6Mb.20937$8H.54797@attbi_s03>

Samuel Walters wrote:
> So, I guess that my point is that C might not be the right language
> for doing numerical processing, but it seems the right language for
> implementing the primitives of numerical processing.

The issue with C is that it is too slow for implementing those primitives
(in part due to pointer aliasing issues).  Fortran is considerably faster.


-- 
Rainer Deyke - rainerd at eldwood.com - http://eldwood.com




From usenet at -OBFUSCATED-joefrancia.com  Sat Jan 31 19:10:44 2004
From: usenet at -OBFUSCATED-joefrancia.com (Joe Francia)
Date: Sun, 01 Feb 2004 00:10:44 GMT
Subject: Problems embedding Python
In-Reply-To: <Xns9482E9728C0Ct45fs6vve@130.133.1.4>
References: <Xns9482E9728C0Ct45fs6vve@130.133.1.4>
Message-ID: <8uXSb.6209695$be.1021111@news.easynews.com>

Psymaster wrote:

> I've tried running scripts from the embedded interpreter but it doesn't 
> work. If I try the same scripts as strings to interpret it works. Here 
> is my program:
> 
> #include <stdio.h>
> #include "Python.h"
> 
> int main(int argc, char *argv[])
> {
>   FILE *script = fopen("c:/c.py", "r");
> 
>   Py_Initialize();  
>   PyRun_SimpleFile(script, "c.py");
>   Py_Finalize();
> 
>   return 0;
> }
> 
> 
> c.py contains just a simple print statement.
> 
> This compiles and links under MSVC 6 but when run crashes. Any help?

Maybe escape your backslash? :

FILE *script = fopen("c:/c.py", "r");
------------------------^


From aahz at pythoncraft.com  Thu Jan 22 12:08:06 2004
From: aahz at pythoncraft.com (Aahz)
Date: 22 Jan 2004 12:08:06 -0500
Subject: What is object()
References: <mailman.655.1074790103.12720.python-list@python.org>
Message-ID: <bup01m$hjm$1@panix1.panix.com>

In article <mailman.655.1074790103.12720.python-list at python.org>,
Hameed Khan  <hameedkhaan at yahoo.com> wrote:
>
>  i was reading library refrence manual. there i found
>object() function. they says in library refrence that 
>        "Return a new featureless object. object() is
>a base for all new style classes. It has the methods
>that are common to all instances of new style
>classes." 

There's not much use for an instance of object.  Don't worry about it.

>My questions are whats the use of this function and
>the object returned by it? and what are new style
>classes?.

http://www.python.org/2.2.3/descrintro.html
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

A: No.
Q: Is top-posting okay?


From max at alcyone.com  Wed Jan 28 19:17:22 2004
From: max at alcyone.com (Erik Max Francis)
Date: Wed, 28 Jan 2004 16:17:22 -0800
Subject: comparing booleans
References: <mailman.951.1075324969.12720.python-list@python.org>
Message-ID: <40185112.264898A4@alcyone.com>

Gerrit Holl wrote:

> is it proper to compare booleans? It is possible, of course, because
> they're compatible with numbers, but booleans aren't truly numbers.
> I'm
> tempted to write:
> 
>     return cmp(self.extends, other.extends)

Even if you're seriously worried about the correctness of comparing
Booleans, you can always explicitly turn them into integers:

	return cmp(int(self.extends), int(other.extends))

> (Hmm, makes me wonder, for booleans, are != and ^ equal?)

Easily checked:

>>> for x in (True, False):
...  for y in (True, False):
...   print x, y, x != y, x ^ y 
... 
True True False False
True False True True
False True True True
False False False False

-- 
 __ Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
/  \ San Jose, CA, USA && 37 20 N 121 53 W && &tSftDotIotE
\__/ Weakness of attitude becomes weakness of character.
    -- Albert Einstein


From peter at engcorp.com  Mon Jan  5 17:38:51 2004
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 05 Jan 2004 17:38:51 -0500
Subject: Socket Programming
References: <KdzGb.23400$NZ1.18286@nwrddc02.gnilink.net>
	<Pine.LNX.4.58-035.0312251306590.2363@unix40.andrew.cmu.edu>
	<vume5ump55fi10@corp.supernews.com>
	<56LGb.5852$UB3.4119@nwrddc03.gnilink.net>
Message-ID: <3FF9E77B.EE769F8F@engcorp.com>

trainee wrote:
> 
> Thanks, everyone.
> Michael: I am really just fooling around for the moment.  Are you telling me
> that there are modules for specific things like IRC?

In addition to the other responses to this: the Twisted package does include
IRC support, along with dozens of other protocols and both higher and lower
level things galore, generally or at least often done in a way that vastly 
simplifies the whole issue well beyond what other approaches have managed.
Go to www.twistedmatrix.com to learn more.

-Peter


From Pieter.Claerhout at Creo.com  Wed Jan 21 09:43:18 2004
From: Pieter.Claerhout at Creo.com (Pieter Claerhout)
Date: Wed, 21 Jan 2004 15:43:18 +0100
Subject: py2exe error
Message-ID: <490316A24CC5D411ACD700B0D078F7F003915DD0@cseexch01.cse.creoscitex.com>

Change the setup script to:

from distutils.core import setup
import py2exe

setup(
      options = {  'py2exe': { 'packages': 'encodings' } },
      name = 'default',
      version = '0.1.0',
      console = ["CLI_Backup.py"],
      windows = ["Configurator.py"]
)

This will force py2exe to include the encodings package which should solve
your problem.

Cheers,


pieter

Creo
pieter claerhout | product support prinergy | tel: +32 2 352 2511 |
pieter.claerhout at creo.com | www.creo.com

IMAGINE CREATE BELIEVE(tm)


-----Original Message-----
From: Haim Ashkenazi [mailto:haim at babysnakes.org] 
Sent: 21 January 2004 15:40
To: python-list at python.org
Subject: py2exe error


Hi

(complete newbie warning...:) )

I've written a script that uses pickle to store data to a file. here's the
code that stored the data:

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

    def put(self, conf):
        """ dump the preferences to a file"""
        
        # TODO: make a backup copy of the prefs !!!!
        try:
            f = open(self.bacFile, "w")
        except:
            raise 'BadFileError', "couldn't write file"
            
        pickle.dump(conf, f)
        f.close()

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

when running from regular python interperter, it works fine.

I need this script to run without python installed, so I've created a
stand-alone binary with py2exe. I used the following simple setup.py:

from distutils.core import setup
import py2exe

setup(name = 'default',
      version = '0.1.0',
      console = ["CLI_Backup.py"],
      windows = ["Configurator.py"]
)
-------------------------

when running from this binary I get this error:
Traceback (most recent call last):
  File "MainFrame.pyc", line 140, in OnSaveMenuEvent
  File "MainFrame.pyc", line 174, in dumpPrefs
  File "NS_Backup.pyc", line 64, in put
  File "pickle.pyc", line 1382, in dump
  File "pickle.pyc", line 231, in dump
  File "pickle.pyc", line 293, in save
  File "pickle.pyc", line 663, in save_dict
  File "pickle.pyc", line 677, in _batch_setitems
  File "pickle.pyc", line 293, in save
  File "pickle.pyc", line 514, in save_unicode
LookupError: no codec search functions registered: can't find encoding
-----------------------------

I guess I should add some custom module to the setup.py but I don't know
which (or am I completely off track here...).

can someone help?

thanx
--
Haim



-- 
http://mail.python.org/mailman/listinfo/python-list



From eric.brunel at N0SP4M.com  Mon Jan 19 09:54:01 2004
From: eric.brunel at N0SP4M.com (Eric Brunel)
Date: Mon, 19 Jan 2004 15:54:01 +0100
Subject: Tk Icon - request to Fredrik Lundh
References: <8089854e.0401190436.10f99713@posting.google.com>
Message-ID: <bugqir$lds$1@news-reader2.wanadoo.fr>

Fuzzyman wrote:
> There is a very interesting (and potentially useful) program on the
> effbot website - called Tkicon.
> 
> http://www.effbot.org/downloads/
> 
> Unfortuantely the last supported version of python is 2.1
> I've seen a few people asking, but never an answer, on Python 2.3
> support.

This utility should not be needed anymore if you're using a recent version of 
tcl/tk: the method wm_iconbitmap on toplevel's, that didn't work on earlier 
versions of tk on Windows, now works without problem. You should specifiy a .ico 
or .icr file name as its argument. See the documentation for the corresponding 
tk command at:
http://www.tcl.tk/man/tcl8.3/TkCmd/wm.htm#M15

HTH
-- 
- Eric Brunel <eric dot brunel at pragmadev dot com> -
PragmaDev : Real Time Software Development Tools - http://www.pragmadev.com



From premshree_python at yahoo.co.in  Mon Jan 12 08:39:30 2004
From: premshree_python at yahoo.co.in (=?iso-8859-1?q?Premshree=20Pillai?=)
Date: Mon, 12 Jan 2004 13:39:30 +0000 (GMT)
Subject: Using switches with exec?
Message-ID: <20040112133930.90763.qmail@web8309.mail.in.yahoo.com>

Hello,

I need to run a Python program dynamically within
another program. I am using exec for the purpose. Is
there a way to pass parameter switches to exec?

-Premshree
[http://www.qiksearch.com/]

________________________________________________________________________
Yahoo! India Mobile: Download the latest polyphonic ringtones.
Go to http://in.mobile.yahoo.com



From claird at lairds.com  Sat Jan 24 07:25:21 2004
From: claird at lairds.com (Cameron Laird)
Date: Sat, 24 Jan 2004 12:25:21 -0000
Subject: Tkinter Base Window
References: <401257c4$0$26116$afc38c87@news.optusnet.com.au>
Message-ID: <1014p1hore6k694@corp.supernews.com>

In article <401257c4$0$26116$afc38c87 at news.optusnet.com.au>,
Peter Moscatt  <pgmoscatt at optushome.com.au> wrote:
>Ok....  I am pretty new to Python (as you may have gathered from previous
>posts).  So now it time for another one of my ridiculous questions....  :-)
>
>When using 'Tkinter', what is used as the base window to work from, meaning
>what widget do I use to place all other widgets onto to create a custom
>dialog ?
			.
			.
			.
When I use Tkinter, I don't talk that way.

I think in terms of the '.' root toplevel, into which I might pack
several frames:
  import Tkinter

  root = Tkinter.Tk()
  frame1 = Tkinter.Frame(root, ...)
  frame2 = Tkinter.Frame(root, ...)
  important_button = Tkinter.Button(root, ...)
  one_label = Tkinter.Label(frame1, ...)
    ... [and so on]
Is that what you're getting at?
-- 

Cameron Laird <claird at phaseit.net>
Business:  http://www.Phaseit.net


From cwilcox at etcconnect.com  Fri Jan  9 12:04:27 2004
From: cwilcox at etcconnect.com (Christian Wilcox)
Date: Fri, 9 Jan 2004 11:04:27 -0600
Subject: displaying extended ASCII from a telnet session
Message-ID: <69A0D4AB81C51447AD6BA387782B8D64093D62@midl-mail4.etcconnect.com>

I'm trying to programmatically access information from a telnet session which is normally accessed with a telnet program capable of terminal emulation (currently set at VT320).  The initial login text displays fine, of course, but when I get to the section which displays extended ASCII characters, Telnet from telnetlib displays the following garbled mess:

?[?40h?[?3l?[0;1m?>?[?1l?[?25l?[?3l?[0;0H?[2J?[?25l?(B??[0;7m?[23B ba6.0 version 03-1993/R1 ?[0m?[0;
7m?[1;2Hmtccom00000000?[1C               ?[1C               ?[1C               ?[1C               ?[
0m?[10;5H?(0?lqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqk?[11;5Hx?[68Cx?[1
2;5Hx?(B?  License Code :   178241/105?[39C?(0?x?[13;5Hx?(B?  Developed for:?[52C?(0?x?[14;5Hx?(B?
Electronic Theatre Controls?[39C?(0?x?[15;5Hx?[68Cx?[16;5Hmqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq
x?(B??[60CChoice:s?[56C?(0?x?[1D?[1B(0?x?[1D?[1B                              ?[5C?(0?x?[1D?[1B

Any ideas of a way to decode this information?

Christian



From dw-google.com at botanicus.net  Sat Jan 24 15:58:50 2004
From: dw-google.com at botanicus.net (David M. Wilson)
Date: 24 Jan 2004 12:58:50 -0800
Subject: Changing endian format
References: <mailman.731.1074956182.12720.python-list@python.org>
Message-ID: <99dce321.0401241258.1f74915f@posting.google.com>

Amit Gaur <amitgaur at yahoo.com> wrote...

> Hi newbie to python here,
> I have a binary file and i need to change the endian format..little to big as well as vice versa..could anyone help me out.

If you use the struct module to read the file, this appears to be
handled for you.

   http://python.org/doc/current/lib/module-struct.html


Example (pack the value 1234 into an unsigned long in little endian,
then big endian format):

   py> import struct
   py> struct.pack('<L', 1234)
   '\xd2\x04\x00\x00'
   py> struct.pack('>L', 1234)
   '\x00\x00\x04\xd2'


See also 'struct.unpack', 'socket.htons', and 'socket.htonl'.


From kevin at sb.org  Wed Jan 28 11:51:37 2004
From: kevin at sb.org (Kevin Ballard)
Date: Wed, 28 Jan 2004 11:51:37 -0500
Subject: Webhosting with Python
References: <8089854e.0401280834.6fd4f972@posting.google.com>
Message-ID: <bv8pch$2lhu$1@bigboote.WPI.EDU>

On 2004-01-28 11:34:43 -0500, michael at foord.net (Fuzzyman) said:

> I've recently starting using a very cheap web hoster who has python
> 2.2 installed.... almost free hosting (but not quite).....
> 
> Thought some of you guys might be interested..........
> 
> http://www.xennos.com
> 
> Fuzzyman

How do you plan to make money off of this?


From dave at pythonapocrypha.com  Fri Jan 23 09:17:08 2004
From: dave at pythonapocrypha.com (Dave Brueck)
Date: Fri, 23 Jan 2004 07:17:08 -0700
Subject: Batch commands on Windows
References: <7A3Qb.4870$AK2.3953@newssvr29.news.prodigy.com>
Message-ID: <015501c3e1bb$963670b0$6401fea9@YODA>

Moosebumps wrote:
> So, after reading some messages about os.system, and looking at the popen
> stuff and trying it a bit, I still have not found a way to keep a command
> window open for several commands (on Windows 2000/XP), while seeing the
> normal output in a command window.  All I want to do is do what a batch file
> does, but I want to actually have functions and associative arrays and all
> the other niceties of python.

Can you give an example of what you mean, in Perl as well as what you hoped
would work in Python? I couldn't quite understand what it is that you're trying
to do.

> What's the deal with that?  I thought Python started out as a scripting
> language.  And that seems like the most basic thing that a scripting
> language should do.

Dunno, although MS-DOS shell scripting is certainly a small subset of scripting
in general. Maybe with a concrete example somebody will be able to give you a
hand.

-Dave




From fumanchu at amor.org  Sat Jan 17 15:01:48 2004
From: fumanchu at amor.org (Robert Brewer)
Date: Sat, 17 Jan 2004 12:01:48 -0800
Subject: yield
Message-ID: <DE1CF2B4FEC4A342BF62B6B2B334601E561C34@opus.amorhq.net>

Gerrit Holl wrote:
Gerrit Holl wrote:
> If a generator reaches a 'yield' statement, it returns
> the result of the expression behind the 'yield' statement.
> ...When you call the 'next' method of the generator, the
> body is executed, until it reaches a 'yield' statement.
> When you call the body again, it is executed again, until
> it reaches a 'yield' statement again,

A bit more explicitly (so as not to mislead the original poster):

When you call the body again, the function "picks up where it left off"
rather than "it is executed again". Example:

>>> def gen():
... 	x = 0
... 	while x < 5:
... 		yield x
... 		x += 1
... 		
>>> [a for a in gen()]
[0, 1, 2, 3, 4]

If it were "executed again", you'd be rebinding x to 0 each time, and
would never exit the while loop, nor would x be incremented. However,
since it "picks up where it left off" (i.e. the yield statement), x is
incremented and the while loop continues until x == 5.


Robert Brewer
MIS
Amor Ministries
fumanchu at amor.org



From graham at rockcons.co.uk  Fri Jan  2 15:23:49 2004
From: graham at rockcons.co.uk (Graham Nicholls)
Date: Fri, 02 Jan 2004 20:23:49 +0000
Subject: Debugging a script
Message-ID: <prkJb.76$tS3.23@news-binary.blueyonder.co.uk>

I've got a (python) program which crashes.  WHat I'd like to do is something
loke this:

        try:
                lots of stuff, or 
                more pertinintly, the code which is failing
        except:
                drop in to the debugger

So that I can print various things.

Also, is there a way to display the line number  - eg:
        except something:
                print ("DEBUG: exception %s at line number %s" % (sys.exc_type,
sys.linenumber))

Thanks
Python 2.3 (#1, Sep 11 2003, 14:36:40)
-- 
#include <wit>


From rjack at elegancetech.com  Sat Jan  3 18:01:25 2004
From: rjack at elegancetech.com (Roger Jack)
Date: Sat, 3 Jan 2004 18:01:25 -0500
Subject: Cheetah best for templating?
Message-ID: <CMudnfQnOeIn1GqiRVn-uQ@comcast.com>

I have just finished reading Code Generation In Action which uses Ruby for
code generation. I would like to use Python instead. Is Cheetah the best
tool to use for templating source code files and then generating code? Is
there something more mature or better?

Thanks!

-- 
Roger Jack
Elegance Technologies, Inc.
484.431.1775
rjack at elegancetech.com
www.elegancetech.com




From ville.spamstermeister.vainio at thisisspamprotectiontut.finland  Tue Jan 20 16:07:09 2004
From: ville.spamstermeister.vainio at thisisspamprotectiontut.finland (Ville Vainio)
Date: 20 Jan 2004 23:07:09 +0200
Subject: I come not to bury C++, but to praise it...
References: <mailman.337.1074032524.12720.python-list@python.org>
	<bu1uul$cam92$1@ID-46268.news.uni-berlin.de>
	<cu%Mb.47396$8H.99443@attbi_s03>
	<bu3khe$dbm5v$1@ID-46268.news.uni-berlin.de>
	<20040114153516.GA16224@intarweb.us>
	<mailman.448.1074285657.12720.python-list@python.org>
	<bujkec$inl4t$1@ID-46268.news.uni-berlin.de>
	<400D5B8F.8C597B9E@engcorp.com>
Message-ID: <du7wu7mcosi.fsf@mozart.cc.tut.fi>

>>>>> "Peter" == Peter Hansen <peter at engcorp.com> writes:

    Peter> Derek wrote:

    >> Absolutely correct.  But remember that ugly template-related
    >> compiler error messages are a reflection of current compiler
    >> technology, not a fundamental limitation of C++.  I suspect
    >> future compilers will make debugging templates much easier.

    Peter> I believe I heard that claim, almost verbatim, sometime
    Peter> around the last time I was actively using C++, which was
    Peter> about a decade ago...

Yes, C++ doesn't suck, it's the implementations. C++ will rock any day
now. Honest.

The same is true for Python - Python isn't slower than C, it's just an
artifact of the current implementation. Python-in-the-sky actually
runs 10-20% faster than C++ code.

-- 
Ville Vainio   http://tinyurl.com/2prnb


From candiazoo at comcast.net  Fri Jan  2 13:50:56 2004
From: candiazoo at comcast.net (Zoo Keeper)
Date: Fri, 02 Jan 2004 18:50:56 GMT
Subject: Problem building on BeOS...
References: <NLhJb.31440$I07.78784@attbi_s53>
	<bt4afp$rgo$03$1@news.t-online.com>
Message-ID: <k4jJb.42879$xX.151826@attbi_s02>

Hmm.  I got the sources directly from sourceforge.  I am thinking maybe the
lines are terminated with \r.  I think there may be a line termination changing
program somewhere on BeBits... I'll go check!

Thanks!

Mike


In message <bt4afp$rgo$03$1 at news.t-online.com>, "Martin_v._L?wis" wrote:
> Zoo Keeper wrote:
> 
> > For some reason, the Python preprocessing balks on the "\" line
> continuation
> > character.  Any ideas/thoughts?  Is it just that my version of gcc is not
> > supported?
> 
> Yes, in combination with the way your source files are structured.
> 
> It appears that the line ending convention differs in your source files
> from the line endings that gcc expects. E.g. the source files may have
> \r\n at the end of a line, whereas your gcc may expect only \n. As
> a result, \\\r\n is treated as an escaped \r, which gives a stray \.
> 
> I don't know what line ending convention your system uses, or where
> you got the sources from, but it appears you need to convert them.
> 
> Later versions of gcc support "universal text mode".
> 
> Regards,
> Martin
> 




From FBatista at uniFON.com.ar  Thu Jan 29 13:46:20 2004
From: FBatista at uniFON.com.ar (Batista, Facundo)
Date: Thu, 29 Jan 2004 15:46:20 -0300
Subject: read() on tempfile
Message-ID: <A128D751272CD411BC9200508BC2194D0338355B@escpl.tcp.com.ar>

cherico at bonbon.net wrote:

#- f = NamedTemporaryFile ()
#- f = write ( 'test' )
#- print f.read () #here print nothing

Never used it, but are you sure it's not:

	f.write('test')

Regards,

.	Facundo



From martin at v.loewis.de  Fri Jan 16 02:42:51 2004
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Fri, 16 Jan 2004 08:42:51 +0100
Subject: PEP for new modules (I read PEP 2)
In-Reply-To: <mailman.419.1074203028.12720.python-list@python.org>
References: <mailman.419.1074203028.12720.python-list@python.org>
Message-ID: <bu84lk$lra$02$1@news.t-online.com>

Christoph Becker-Freyseng wrote:
> So basically I want to relocate the real Specification, because the more 
> specific it gets the more it looks like a documentation and the prePEP 
> grows and grows ...
> 
> 
> Is this a valid option for a PEP?

If you are asking: "Can we have an implementation before we write the 
PEP?", the answer is "Certainly, yes".

The PEP procedure is designed to avoid wasting efforts in implementing
ideas that have no chance to ever get accepted to the Python core.
If this is no concern for you (i.e. you are willing to accept the risk
of wasting efforts), you can certainly implement the thing, wait for
user feedback, and then write the PEP.

Regards,
Martin



From tjreedy at udel.edu  Wed Jan 14 23:39:47 2004
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 14 Jan 2004 23:39:47 -0500
Subject: Deleting objects
References: <c542f8acd755de732c9da8fc39fbb50a@news.teranews.com>
Message-ID: <frmdnfd_O6gVhJvd4p2dnA@comcast.com>


<user at domain.invalid> wrote in message
news:c542f8acd755de732c9da8fc39fbb50a at news.teranews.com...
> Say I have an object (foo), that contains an
> array (bar) of references to other objects.
>
> Now I want to puff some of the objects from the
> array so that I remove the array element, and
> destroy the oject.
>
> but when I do:
>
> del foo.bar[0]
>
> Python says:
>   object doesn't support item deletion

What is the actual type of foo.bar?  >>>type(foo.bar) # prints what?

tjr




From gerrit at nl.linux.org  Sat Jan 17 11:59:21 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Sat, 17 Jan 2004 17:59:21 +0100
Subject: yield
In-Reply-To: <20040117170808.GA21486@mrna.tn.nic.in>
References: <20040117170808.GA21486@mrna.tn.nic.in>
Message-ID: <20040117165920.GA31881@nl.linux.org>

> i didnt understand the purpose of  'yield' keyword and the concept of 'generators' in python.  can someone explain me with a small example how  generators differ from normal function calls?
> kindly enlighten

You can see 'yield' as a continuable function:

def f():
    yield time.time()
    yield time.time()
    yield time.time()

now f() will return a generator, with a .next() method. Try:
g = f()
g.next()
g.next()
g.next()

on the interactive prompt, and see what happens...

yours,
Gerrit.

-- 
Mozilla _is_ the web: it grows faster than you can download it.
1011001 1101111 1110101 1110010 1110011 0101100
1000111 1100101 1110010 1110010 1101001 1110100



From google at axiomatize.com  Thu Jan 15 18:29:21 2004
From: google at axiomatize.com (Laurent Therond)
Date: 15 Jan 2004 15:29:21 -0800
Subject: Binary strings, unicode and encodings
References: <265368cb.0401151138.37a3a47b@posting.google.com>
	<4006F13C.7D432B98@engcorp.com>
Message-ID: <265368cb.0401151529.50c36679@posting.google.com>

I used the interpreter on my system:

>>> import sys
>>> sys.getdefaultencoding()
'ascii'

OK

>>> from cStringIO import StringIO
>>> b = StringIO()
>>> b.write('%d:%s' % (len('string'), 'string'))
>>> print b.getvalue()
6:string

OK

>>> c = StringIO()
>>> c.write('%d:%s' % (len('string?'), 'string?'))
>>> print c.getvalue()
7:string?

OK

Did StringIO just recognize Extended ASCII?
Did StringIO just recognize ISO 8859-1?

? belongs to Extended ASCII AND ISO 8859-1.

>>> print c.getvalue().decode('US-ASCII')
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
UnicodeDecodeError: 'ascii' codec can't decode byte 0x82 in position 8: ordinal
not in range(128)

>>> print c.getvalue().decode('ISO-8859-1')
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "C:\Python23\lib\encodings\cp437.py", line 18, in encode
    return codecs.charmap_encode(input,errors,encoding_map)
UnicodeEncodeError: 'charmap' codec can't encode character u'\x82' in position 8
: character maps to <undefined>
>>>

OK

It must have been Extended ASCII, then.

I must do other tests.


From cy.fbp.eryvtvne at ncbybtrglxn.pbz  Mon Jan 12 09:28:58 2004
From: cy.fbp.eryvtvne at ncbybtrglxn.pbz (JZ)
Date: Mon, 12 Jan 2004 15:28:58 +0100
Subject: [Webware] FormKit - dynamic fields problem
Message-ID: <5lb5001v1j64v6kdbteaas235d5sj6lan2@4ax.com>

I use Webware and FormKit. I have a problem with dynamic added field
to the form. The following code creates one input field and two submit
buttons. I would like to add more (up to 4) input fields after
pressing "more" button. It does not work and I have no idea how to
solve it.

import re
from WebKit.Page import Page
from FormKit import Form, Fields, Validators
from FormKit.FormKitMixIn import FormKitMixIn

class DynamicProblem(FormKitMixIn, Page):
    
    def __init__(self):
        Page.__init__(self)
        notEmpty = Validators.NotEmpty() 
        f = self.form = Form.Form()
        self.addForm(f)
        f.addField(Fields.TextField('msg', validators=[notEmpty]))
        f.addField(Fields.WebKitSubmitButton('more'))
        f.addField(Fields.WebKitSubmitButton('send'))

    def sleep(self, trans):
        self.resetForms() 
        Page.sleep(self, trans)

    def writeHTML(self):
        self.write(self.form.dump())

    def extendForm(self):
        notEmpty = Validators.NotEmpty() 
        f = self.form
        nr =  len(filter(lambda x:re.match(r'^msg',x),
                         self.form.values().keys()))
        if nr < 4:
            f.addField(Fields.TextField('msg%d' % nr,
                                        validators=[notEmpty]))
        
    def actions(self):
        return  ['more', 'send']

    def more(self):
        if  self.form.isSuccessful():
            self.extendForm()

    def send(self):
        if  self.form.isSuccessful():
            pass

--
JZ



From bart_nessux at hotmail.com  Fri Jan 16 08:38:04 2004
From: bart_nessux at hotmail.com (Bart Nessux)
Date: Fri, 16 Jan 2004 08:38:04 -0500
Subject: python & mathematical methods of picking numbers at random
In-Reply-To: <59idnYa3_eQMtJrd4p2dnA@comcast.com>
References: <bu6ptu$kjm$1@solaris.cc.vt.edu>
	<mailman.414.1074195832.12720.python-list@python.org>
	<bu6rvn$njg$1@solaris.cc.vt.edu>
	<59idnYa3_eQMtJrd4p2dnA@comcast.com>
Message-ID: <bu8pft$2o$1@solaris.cc.vt.edu>

Terry Reedy wrote:
> "Bart Nessux" <bart_nessux at hotmail.com> wrote in message
> news:bu6rvn$njg$1 at solaris.cc.vt.edu...
> 
>>Jeff Epler wrote:
>>
>>>But why are *you* using
>>>    random.sample(range(len(x)), 25)
>>>instead of
>>>    random.sample(x, 25)
>>>?
> 
> 
>>Because it works and it's fast and len(count) changes every drawing.
> 
> 
> I think you missed Jeff's point, which is that you are repeating part of
> the work that sample tries to do for you.   From the Lib Ref:
> "
> sample(sequence, k): Return a k length list of unique elements chosen from
> the population sequence. Used for random sampling without replacement. New
> in version 2.3.
> 
> Returns a new list containing elements from the population while leaving
> the original population unchanged. The resulting list is in selection order
> so that all sub-slices will also be valid random samples. This allows
> raffle winners (the sample) to be partitioned into grand prize and second
> place winners (the subslices).
> "
> When you get the sample from range(n), you have to use them as indexes into
> x to get the actual list of names.  But the indexing and extraction is what
> sample would do if you gave it x instead of range(x)!
> 
> Terry J. Reedy
> 
> 

Also, the below statement should be removed from random's 
documentation... it's where I got the idea to do:

random.sample(range(len(x)), 25)
instead of
random.sample(x, 25)

"To choose a sample from a range of integers, use xrange
as an argument. This is especially fast and space efficient
for sampling from a large population: sample(xrange(10000000), 60)."

http://www.python.org/doc/current/lib/module-random.html



From ferrell at diablotech.com  Thu Jan 15 18:29:29 2004
From: ferrell at diablotech.com (Robert Ferrell)
Date: 15 Jan 2004 15:29:29 -0800
Subject: Redefining __call__ in an instance
Message-ID: <73b00f0c.0401151529.676347b6@posting.google.com>

I have a question about assigning __call__ to an instance to make that
instance callable.  I know there has been quite a bit of discussion
about this, and I've read all I can find, but I'm still confused.

I'd like to have a factory class that takes a string argument and returns
the appropriate factory method based on that string.  I'd like the
instances to be callable.  Like this:

fact = Factory('SomeThing')
aSomeThing = fact(some args)

anotherFact = Factory('SomeThingElse')
anotherThing = anotherFact(some other args)

The way I thought to do this was to assign the __call__ attribute of
the fact instance to the appropriate factory method in __init__.  That does not
work, as many others have pointed out.  I know there are workarounds.
The appended code shows the variants I know of.  I can use one of
them, but they are not quite what I am looking for.  

Have I missed the key message that explains how to make new-style
classes callable, with the called method unique to each instance?

thanks,
-robert

"""Test use of __call__ in a (new style) class.
   The classes below show various ways of making instances
   of a class callable.  The goal is to make an instance callable,
   with the called method defined distincly for each instance.
"""


def firstFunc(word = 'up'):
  """This is the method to call, when an instance is invoked."""
  print "This is firstFunc, word %s." % word
  return

class callWorks(object):
  """This works, since the called method is defined in the class."""
  def __init__(self):
    pass
  def __call__(self, word = 'up'):
    print 'This is inside callWorks, word %s.' % word
    return

class callNoWork(object):
  """This doesn't work, since __call__ is defined for the method,
     not the class."""
  def __init__(self):
    # This does not make an instance of callNoWork callable
    self.__call__ = firstFunc
    
class callWorksNoFun(object):
  """This works, but since the class's method is being called, the
     default arguments are defined by the class, and do not
     properly reflect the default arguments of the method that
     wants to be called."""
  def __init__(self):
    self._callFunc = firstFunc
  def __call__(self, word = None):
    # Although an instance of callWorksNoFun is callable,
    # the default arguments are wrong
    self._callFunc(word)
    return

class addCallAttribute(object):
  """Add the attribute 'callMe', which is the callable function.
     This works fine, but requires the user to invoke this as
     instance.callMe(), rather than just instance()."""
  def __init__(self):
    self.callMe = firstFunc
    
# Simplest thing
cw = callWorks()
cw()

# Natural thing to try, but doesn't work
cnw = callNoWork()
# The instance, cnw, is not callable.
try:
  cnw()
except Exception, exception:
  print 'Call did not work, gave exception: %s.' % exception

# Works, but actually invoking class method, not instance's method
cwNF = callWorksNoFun()
# The instance cwNF is callable, but the default value for the callable is wrong.
# This works fine
cwNF('No up')
# This should default to print 'Up', but instead it defaults to None.
cwNF()

# Fine, but requires user to invoke instance.callMe(), rather than just instance().
aCA = addCallAttribute()
# To call the instance, use the callMe attribute.  That respects defaults fine.
aCA.callMe()


From pgmoscatt at optushome.com.au  Sat Jan 24 06:32:19 2004
From: pgmoscatt at optushome.com.au (Peter Moscatt)
Date: Sat, 24 Jan 2004 21:32:19 +1000
Subject: Tkinter Base Window
Message-ID: <401257c4$0$26116$afc38c87@news.optusnet.com.au>

Ok....  I am pretty new to Python (as you may have gathered from previous
posts).  So now it time for another one of my ridiculous questions....  :-)

When using 'Tkinter', what is used as the base window to work from, meaning
what widget do I use to place all other widgets onto to create a custom
dialog ?

Pete



From max at alcyone.com  Fri Jan 23 02:16:44 2004
From: max at alcyone.com (Erik Max Francis)
Date: Thu, 22 Jan 2004 23:16:44 -0800
Subject: Mixing protocols in pickles?
References: <mailman.674.1074837967.12720.python-list@python.org>
Message-ID: <4010CA5C.2B09D009@alcyone.com>

Tim Peters wrote:

> Try getting gzip out of your test program; pickles are exercised more
> heavily than gzip.  Try it with both pickle and cPickle; it might
> matter.

Actually in this test case gzip was not being used at all.

> That's especially puzzling to me because that error message isn't one
> Python
> produces:  all messages of this form produced by the core spell it
> "module"
> instead of "Module".

Yes, that was from a client typing in the results; I verified that the
error was genuine.  A typo here, a typo there.

-- 
 __ Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
/  \ San Jose, CA, USA && 37 20 N 121 53 W && &tSftDotIotE
\__/ Freedom is never voluntarily given by the oppressor.
    -- Dr. Martin Luther King, Jr.


From davidb at mcs.st-and.ac.uk  Fri Jan  9 14:15:58 2004
From: davidb at mcs.st-and.ac.uk (David Boddie)
Date: 9 Jan 2004 11:15:58 -0800
Subject: metadocumentation (keyword help)
References: <tyfn091gnk5.fsf@pcepsft001.cern.ch>
	<mailman.144.1073405082.12720.python-list@python.org>
	<3ffb0edf$1@nntp0.pdx.net> <tyfhdz8gn8k.fsf@pcepsft001.cern.ch>
	<d69wnik0.fsf@python.net> <tyfbrpggc6u.fsf@pcepsft001.cern.ch>
	<4de76ee2.0401081318.bab6f62@posting.google.com>
	<tyffzepfofo.fsf@pcepsft001.cern.ch>
Message-ID: <4de76ee2.0401091115.1a242974@posting.google.com>

Jacek Generowicz <jacek.generowicz at cern.ch> wrote in message news:<tyffzepfofo.fsf at pcepsft001.cern.ch>...

> Thank you for your refreshingly constructive followup.

No problem.

> davidb at mcs.st-and.ac.uk (David Boddie) writes:
> 
> > Jacek Generowicz <jacek.generowicz at cern.ch> wrote in message news:<tyfbrpggc6u.fsf at pcepsft001.cern.ch>...
> > > [...] 
> >
> > revealed that the basic information about the PYTHONDOCS environment
> > variable can be found at the foot of the following page:
> > 
> >     http://www.python.org/dev/doc/devel/lib/module-pydoc.html
> 
> This strikes me as not very helpful to someone looking to solve the
> problem of _keyword_ documentation not working. Remember, we're
> talking about poor lost newbies.

Well, it addresses part of the problem, but I mentioned it because it
reveals the inadequacy of the available information. Not that it's the
fault of the pydoc documentation author(s) for this shortcoming, of
course.

The page does link to a page which deals with the issue of feedback:

    http://www.python.org/dev/doc/devel/lib/about.html

;-)

[Draft document - Setting it up]

> > If the documentation is required then go to::
> > 
> >   http://www.python.org/download/
> >
> > and find the appropriate documentation. Download it and install it
> > in a place where it can be read by those who will be using it.
> 
> How about 
> 
>   If the documentation is required then go to:
>   
>     http://www.python.org/doc/<python-version>/download.html
>  
>   and download the HTML documention and install it in a place where it
>   can be read by those who will be using it.
> 
> ?

Perhaps. I'd hesitate to use "<python-version>" in the URL because it
may actually be displayed as a link in whichever browser is used to
display the documentation. Note that I'd used the "::" at the end of
the initial sentence because I'd subversively used reStructuredText
markup (http://docutils.sf.net/). How about the following text?

  If the documentation is required then go to::
  
    http://www.python.org/doc/download.html
 
  and download the HTML documention which is suitable for the version
  of Python you wish to use and install it in a place where it can be
  read by those who need it.

> > Enabling this by default
> > ------------------------
> > Any ideas?
> 
> I guess this would require the HTML documentation to be bundled in
> with the Python distribution tarball, and I can imagine that being an
> unpopular suggestion.

I meant, "How can one set up the interpreter so that PYTHONDOCS is
already set to the correct value?"

For example, on a Linux system, one could ensure that each user's
environment has this variable set up by modifying a relevant file
in their home directory. I don't know how you would do this on the Mac
or on Windows.

Another approach would be to modify the sitecustomize.py file; see the
site.py for information about this.

> Now, currently one gets the following from Python's built-in help:
> 
>   >>> help('if')
>   
>   Sorry, topic and keyword documentation is not available because the Python
>   HTML documentation files could not be found.  If you have installed them,
>   please set the environment variable PYTHONDOCS to indicate their location.
> 
> How about augemnting this with something like:
> 
>   The HTML documentation files can be obtained from 
> 
>     http://www.python.org/doc/<python-version>/download.html
> 
> ?

Maybe you should forward this suggestion to one of the Python developers;
unless they're reading this thread already.

> And then there's the wart surrounding the following:
> 
>   lambda, and, not, or  
> 
> I always get 
> 
>   could not read docs from $PYTHONDOCS//ref/lambda.html
> 
> Note, I even get 'lambda.html' in the message when asking for help on
> the other three. Any ideas what's going on there ?

This works for me, although I am using the docs from Python 2.2 with
the Python 2.3 interpreter. Which versions of each are you using?
Maybe something changed at some point - some files were reorganised,
or something?

> Furthermore, is there anyway of getting help of keywords via pydoc ?

It's the same approach: PYTHONDOCS=<path> pydoc <keyword>

David


From galfip at freestart.hu  Sun Jan 18 08:01:14 2004
From: galfip at freestart.hu (Peter Galfi)
Date: Sun, 18 Jan 2004 14:01:14 +0100
Subject: Fw: PDF library for reading PDF files
Message-ID: <000c01c3ddc3$27312800$7800a8c0@mailer>

Hi!

I am looking for a library in Python that would read PDF files and I could extract information from the PDF with it. I have searched with google, but only found libraries that can be used to write PDF files.

Any ideas?

Peter
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From ravenar at cox.net  Sat Jan 31 22:28:04 2004
From: ravenar at cox.net (Corwan)
Date: 31 Jan 2004 19:28:04 -0800
Subject: What's the difference between win32ui and win32gui?
Message-ID: <543bb43c.0401311928.3be1fe36@posting.google.com>

What's the difference between win32ui and win32gui?


From skip at pobox.com  Sat Jan 10 13:36:21 2004
From: skip at pobox.com (Skip Montanaro)
Date: Sat, 10 Jan 2004 12:36:21 -0600
Subject: Setting up test for XML-RPC
In-Reply-To: <aIPLb.2261$oo3.640@newssvr29.news.prodigy.com>
References: <cDPLb.2260$nl3.2178@newssvr29.news.prodigy.com>
	<aIPLb.2261$oo3.640@newssvr29.news.prodigy.com>
Message-ID: <16384.17957.721185.451449@montanaro.dyndns.org>


    MB> OK, I tried the obvious and it worked.  : ) I just changed the call
    MB> to server.pow(3,5) and it returns the correct result.  I wonder why
    MB> they aren't set up that way in the first place.

The xmlrpclib module predates SimpleXMLRPCServer by a fair amount.  The
getStateName() test was meant to connect to UserLand's original test server.
As I recall, that was the sole function it exported.  I don't see any reason
why SimpleXMLRPCServer needs to implement getStateName(), but I imagine it
would be reasonable for xmlrpclib's test to call pow().

    MB> But the second question still stands.  I am running both the client
    MB> and server on my own machine now (Windows 2000).  Would I just need
    MB> Python and web server if they were different machines?  I would like
    MB> to avoid installing a bunch of software on the 20 machines if
    MB> possible.

You should be able to build a server and a client with just the standard
Python distribution.  If performance is an issue (it will be if you are
passing large chunks of data back and forth), there are some things you can
do to speed it up:

    * Install Fredrik Lundh's sgmlop module.

    * Marshal or pickle your data first, then base64 encode them before
      passing them to or fro.  This greatly reduces the number of XML tags
      on-the-wire, and thus the encode/decode time and data size.
      Obviously, this only works if you are talking Python-to-Python.

    * Tweak things to gzip-encode the traffic between server and client.

    * Use the xmlrpclib.MultiCall class to bundle logical multiple calls
      into a single physical XML-RPC call.

Skip



From eric.brunel at N0SP4M.com  Mon Jan 19 09:34:59 2004
From: eric.brunel at N0SP4M.com (Eric Brunel)
Date: Mon, 19 Jan 2004 15:34:59 +0100
Subject: Analysing Word documents (slow) What's wrong with this code
	please!
References: <3d06fae9.0401161351.75e7f5a@posting.google.com>
Message-ID: <bugpf4$i7$1@news-reader4.wanadoo.fr>

jmdeschamps wrote:
> Anyone has a hint how else to get faster results?
> (This is to find out what was bold in the document, in order to grab
> documents ptoduced in word and generate html (web pages) and xml
> (straight data) versions)
> 
> # START ========================
> import win32com.client
> import tkFileDialog, time
> 
> # Launch Word
> MSWord = win32com.client.Dispatch("Word.Application")
> 
> myWordDoc = tkFileDialog.askopenfilename()
> 
> MSWord.Documents.Open(myWordDoc)
> 
> boldRanges=[]  #list of bold ranges
> boldStart = -1
> boldEnd = -1
> t1= time.clock()
> for i in range(len(MSWord.Documents[0].Content.Text)):
>     if MSWord.Documents[0].Range(i,i+1).Bold  : # testing for bold
> property

Vaguely knowing how pythoncom works, you'd really better avoid asking for 
MSWord.Documents[0] at each loop step: pythoncom will fetch the COM objects 
corresponding to all attributes and methods you ask for dynamically and it may 
cost a lot of time. So doing:

doc = MSWord.Documents[0]
for i in range(len(doc.Content.text)):
   if doc.Range(i,i+1).Bold: ...

may greatly improve performances.

>         if boldStart == -1:
>             boldStart=i
>         else:
>             boldEnd= i
>     else:
>         if boldEnd != -1:
>             boldRanges.append((boldStart,boldEnd))
>             boldStart= -1
>             boldEnd = -1          
> t2 = time.clock()
> MSWord.Quit()
> 
> print boldRanges  #see what we got
> print "Analysed in ",t2-t1
> # END =====================================
> 
> Thanks in advance


-- 
- Eric Brunel <eric dot brunel at pragmadev dot com> -
PragmaDev : Real Time Software Development Tools - http://www.pragmadev.com



From nopa90 at msn.com  Sat Jan 17 01:22:09 2004
From: nopa90 at msn.com (maxwell hammer)
Date: Sat, 17 Jan 2004 06:22:09 +0000
Subject: Python wrapper to ffmpeg and speex
Message-ID: <BAY3-F31N95ZIb0qKNV0000e060@hotmail.com>

Wrapper to ffmpeg or the libavcodec part atleast
and another wrapper to the speex library

_________________________________________________________________
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From try_vanevery_at_mycompanyname at yahoo.com  Wed Jan 14 17:01:40 2004
From: try_vanevery_at_mycompanyname at yahoo.com (Brandon J. Van Every)
Date: Wed, 14 Jan 2004 14:01:40 -0800
Subject: The GPL / BSD cultural divide (was ProtoCiv: porting Freeciv to
	Python CANNED)
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<n22Nb.11299$9k7.210522@news.xtra.co.nz>
	<bu2pgs$d123a$1@ID-207230.news.uni-berlin.de>
	<4004EC9E.1E2E2893@alcyone.com> <bu3iv2$n2u$4@tyfon.itea.ntnu.no>
Message-ID: <bu4dii$daqjq$1@ID-207230.news.uni-berlin.de>

"Bent C Dalager" <bcd at pvv.ntnu.no> wrote in message
news:bu3iv2$n2u$4 at tyfon.itea.ntnu.no...
> In article <4004EC9E.1E2E2893 at alcyone.com>,
> Erik Max Francis  <max at alcyone.com> wrote:
> >
> >If you're saying that you've come to the realization that volunteer
> >programers on a project with which you only have a passing interest
> >won't follow your orders and do whatever you say, I'd say pointing that
> >out is less like "denigration" and more like "common goddamn sense."
>
> It is, never the less, worth pointing out. It would seem that Brandon
> entered the scene with an idea that OSS developers might be incredibly
> useful to him for some reason or other. Other game developers might
> very well have the same idea. When Brandon finds out that this is not
> the case and describes in some detail why OSS won't do the job for
> him, than this can certainly be useful for other game developers to
> learn so that don't have to spend 6 months figuring out the exact same
> thing themselves.
>
> The conclusion may seem obvious to _you_ but this is no guarantee that
> everyone else also possesses this knowledge. OSS is being hailed as
> the second coming, and it comes as no surprise therefore that some
> people might be deluded into thinking they could harness this power to
> cure cancer overnight or land a man on Mars by 2005.

Agreed, and more specifically, there is a huge *cultural divide* between
most OSS developers and proprietary commercial developers who simply want to
add some OSS "to get the boring bits over with."  There are also huge
cultural divides between Linux and Windows developers, and again between
commercial game developers and hobbyist game developers.

These cultural divides are what make the vast majority of people useless to
my purposes, not some table waiter fetish as some other poster indicated.
The problem is, the OSS people are inevitably going to pursue *their* goals,
and there is not much overlap between their goals and *my* goals.  They
don't think about problems the same way, they don't work the same way, they
don't manage the same way, they don't ship to the same schedules, they don't
apply the same degree of seriousness to various endeavors... the list goes
on and on and on.  OSS people are doing "their thing," and it is not my
thing.  Even though, in the abstract, I'm perfectly willing to use BSD style
licenses as part of my ongoing development.

In fact, one can identify the locus of problems by simply asking, "How many
OSS game developers are willing to work on something with a BSD license?"
Precious few.  Most BSD licenses out there are not game software.  BSD is a
good indicator that someone cares about commercial concerns.

-- 
Cheers,                         www.indiegamedesign.com
Brandon Van Every               Seattle, WA

"Desperation is the motherfucker of Invention." - Robert Prestridge



From hgeldenhuys at gims.com  Wed Jan 21 10:00:03 2004
From: hgeldenhuys at gims.com (Herman Geldenhuys)
Date: Wed, 21 Jan 2004 17:00:03 +0200
Subject: Dailing modem.
References: <F1921F85572CB04D9F55B14BDC76B3E4434641@tdi_nt9.internal.viacom-outdoor.co.uk>
Message-ID: <004001c3e02f$3fcab5c0$b10d10ac@metasalio>

Thanks for the reply.

Yes, it is on Windoze.

Is the win32ras realy what I want? Basically what I am trying to do, is to
convert my phone/voice-modem/computer into a "computer-phone". I need to
dail a number and disconnect via an interface on the computer using python.
So, I am dailing normal numbers and not RAS servers. Or am I missing
something?

Thanks again

H

----- Original Message ----- 
From: "Tim Golden" <tim.golden at viacom-outdoor.co.uk>
To: "'Herman Geldenhuys'" <hgeldenhuys at gims.com>; <python-list at python.org>
Sent: Wednesday, January 21, 2004 4:29 PM
Subject: RE: Dailing modem.


> > I need to dail a modem from python and disconnect it again.
>
> Assuming you're on Windows (since you're talking about TAPI & COM)
> look at the win32ras module in Mark Hammond's win32 extensions.
>
> TJG
>
>
> ________________________________________________________________________
> This e-mail has been scanned for all viruses by Star Internet. The
> service is powered by MessageLabs. For more information on a proactive
> anti-virus service working around the clock, around the globe, visit:
> http://www.star.net.uk
> ________________________________________________________________________
>




From peter at engcorp.com  Thu Jan 29 09:52:13 2004
From: peter at engcorp.com (Peter Hansen)
Date: Thu, 29 Jan 2004 09:52:13 -0500
Subject: crc-16
References: <ec254e04.0401290526.89bced6@posting.google.com>
Message-ID: <40191E1D.D912C1BB@engcorp.com>

eugene wrote:
> 
> I looked for a crc-16(crc 16) function to use but couln't find one
> that worked:
> 
> This one is working ..
> 
>         def crc16(s):
[snip]


Since eugene started the thread, I'll continue it by posting one that we've
been using.  It's likely not as fast (eugene's used a lookup table for some
of the work) but it has the added benefit of allowing you to specify which
mask value will be used, so it is more general.  You also have to call it
once for each byte of data rather than wait for all the data to be collected
but sometimes that's more appropriate anyway.

# 16-bit CRCs should detect 65535/65536 or 99.998% of all errors in
# data blocks up to 4096 bytes
MASK_CCITT  = 0x1021     # CRC-CCITT mask (ISO 3309, used in X25, HDLC)
MASK_CRC16  = 0xA001     # CRC16 mask (used in ARC files)

#----------------------------------------------------------------------------
# Calculate and return an incremental CRC value based on the current value
# and the data bytes passed in as a string.
#
def updcrc(crc, data, mask=MASK_CRC16):

    # data_length = len(data)
    # unpackFormat = '%db' % data_length
    # unpackedData = struct.unpack(unpackFormat, data)

    for char in data:
        c = ord(char)
        c = c << 8

        for j in xrange(8):
            if (crc ^ c) & 0x8000:
                crc = (crc << 1) ^ mask
            else:
                crc = crc << 1
            c = c << 1

    return crc & 0xffff


-Peter


From nav+posts at bandersnatch.org  Thu Jan  8 11:58:54 2004
From: nav+posts at bandersnatch.org (Nick Vargish)
Date: 08 Jan 2004 11:58:54 -0500
Subject: 'inverting' a dict
References: <3ff1b688$0$319$e4fe514c@news.xs4all.nl>
Message-ID: <m3ad4y8jht.fsf@tanelorn.bandersnatch.org>

Irmen de Jong <irmen at -NOSPAM-REMOVETHIS-xs4all.nl> writes:

> I have this dict that maps a name to a sequence of other names.
> I want to have it reversed, i.e., map the other names each to
> the key they belong to (yes, the other names are unique and
> they only occur once). Like this:

That's almost spooky, I'm working on a project for which I needed
something like this. I've just read the entire thread and my solution
seems pretty naive:

def invertdict(d):
    """Returns a dict whose key-value pairs are the value-key pairs of d."""
    ret = {}
    for k in d:
        ret[d[k]] = k
    return ret

I only need to do it once or twice, at program start-up, so time-
efficiency wasn't a critical factor. I'm guessing the list
comprehension tactics are faster, though.

Sorry about being late to the party, I've been away from Usenet for
about three weeks...

Nick

-- 
#  sigmask  ||  0.2  ||  20030107  ||  public domain  ||  feed this to a python
print reduce(lambda x,y:x+chr(ord(y)-1),' Ojdl!Wbshjti!=obwAcboefstobudi/psh?')


From marco at bubke.de  Wed Jan  7 03:33:28 2004
From: marco at bubke.de (Marco Bubke)
Date: Wed, 07 Jan 2004 09:33:28 +0100
Subject: shelve and writeback
Message-ID: <btgg8o$nlg$2@graf.cs.uni-magdeburg.de>

Hi

If I do 

shelve.open(filename='prim', protocol=pickle.HIGHEST_PROTOCOL,
writeback=True)

I get on some maschines(its the some python):

Traceback (most recent call last):
  File "server.py", line 45, in ?
    daemon.connectPersistent(GridManager(),'gridmanager')
  File "server.py", line 10, in __init__
    self.server = object_manager.PrimServer()
  File "/home/marco/projects/gridcomputing/ronny/object_manager.py", line 7,
in __init__
    self.values = shelve.open(filename='prim',
protocol=pickle.HIGHEST_PROTOCOL, writeback=True)
  File "/usr/local/lib/python2.3/shelve.py", line 231, in open
    return DbfilenameShelf(filename, flag, protocol, writeback, binary)
  File "/usr/local/lib/python2.3/shelve.py", line 212, in __init__
    Shelf.__init__(self, anydbm.open(filename, flag), protocol, writeback,
binary)
  File "/usr/local/lib/python2.3/anydbm.py", line 83, in open
    return mod.open(file, flag, mode)
  File "/usr/local/lib/python2.3/dbhash.py", line 16, in open
    return bsddb.hashopen(file, flag, mode)
  File "/usr/local/lib/python2.3/bsddb/__init__.py", line 186, in hashopen
    d.set_flags(hflags)
bsddb._db.DBInvalidArgError: (22, 'Invalid argument')
Exception exceptions.AttributeError: "DbfilenameShelf instance has no
attribute 'writeback'" in  ignored
closing database
Exception exceptions.AttributeError: "PrimServer instance has no attribute
'values'" in <bound method PrimServer.__del__ of <object_manager.PrimServer
instance at 0x4042096c>> ignored


is this a bug?

thx

Marco


From paul at prescod.net  Tue Jan 20 12:07:07 2004
From: paul at prescod.net (Paul Prescod)
Date: Tue, 20 Jan 2004 09:07:07 -0800
Subject: calling Pyrex results from C
Message-ID: <400D603B.2010007@prescod.net>

[cross-posted to the pyrex list for interest and then resent to the main 
list]

Kyler says:
 > I need to submit C/C++ code for a class.
 > ...
 > I'd like to keep my sanity and satisfy the course
 > requirements by programming in Python and converting
 > the code to C.

I have three questions:

  1. How is your teacher going to react when you hand in obfuscated-ish 
C code that depends on the whole Python interpreter _and_ PIL? If they 
tried force you into a particular language it is probably because they 
want to avoid the interpreter dependency headache.

2. Would you mind if further discussion happend on the Pyrex mailing 
list? Someone there may have tried this before.

3. Are you initializing the Python interpreter at all? I am going to 
guess that this is related to your problem. After all you are 
"embedding" rather than "extending" Python. main() is in C.

http://www.python.org/doc/current/ext/embedding.html

  Paul Prescod





From jcarlson at nospam.uci.edu  Mon Jan 26 01:56:45 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Sun, 25 Jan 2004 22:56:45 -0800
Subject: Guardian: open source is a throwback says Jack Schofield
In-Reply-To: <bv1tda$n8j1s$1@ID-221199.news.uni-berlin.de>
References: <64cff82f.0401251143.328388bd@posting.google.com>
	<mailman.772.1075066543.12720.python-list@python.org>
	<bv1jkf$g46$1@namru.matavnet.hu>
	<bv1pgj$ctl$3@news.service.uci.edu>
	<bv1tda$n8j1s$1@ID-221199.news.uni-berlin.de>
Message-ID: <bv2drd$j5e$1@news.service.uci.edu>

>>Never underestimate the power of stupidity (or ignorance, or denial,
> 
> or...).
> 
>>Speaking of which...
>>http://www.whitehouse.gov/news/releases/2004/01/20040122-5.html
>>
>>  - Josiah
> 
> Amazing!  I didn't know he could completely miss the point so much.

Spend some time reading this guy's blog:
http://livejournal.com/users/malcubed

He links examples of the current administration's utter stupidity a 
couple times each day.  We don't get along that well (for various 
reasons), but he's on top of the political scene.

  - Josiah


From james at logicalprogression.net  Thu Jan 15 05:25:48 2004
From: james at logicalprogression.net (James Henderson)
Date: Thu, 15 Jan 2004 10:25:48 +0000
Subject: Bug or feature?
In-Reply-To: <bu58st$1ha3$1@news.rtcomm.ru>
References: <bu58st$1ha3$1@news.rtcomm.ru>
Message-ID: <200401151025.48780.james@logicalprogression.net>

On Thursday 15 January 2004 5:40 am, Alexey Nezhdanov wrote:
> Hello. Found a strange python behaivoir while writing some object. I've
> stripped out all other stuff so the problem is stright here:
> =================================
> #!/usr/bin/python
>
> class Object:
>      def __init__(self,val):
>          self.val=val
>
>      def Sub(self,delta):
>          self.val-=delta
>          return delta
>
> c=Object(1)
>
> ### case 1 ###
> d=c.Sub(1)
> c.val+=d
> print 'case A:',c.val
>
> ### case 2 ###
> c.val+=c.Sub(1)
> print 'case B:',c.val
> =================================
> Case 1 and case 2 prints out different calues (1 and 2 respectively).
> Do not know - if this is a bug or feature of python.
>
> --
> Alexey Nezhdanov

This is the expected behaviour.

The terms on the RHS (c.val and c.Sub(1) in case 2) are evaluated left to 
right before being added together.  If you'd reversed the terms of case 2 and 
written:

c.val = c.Sub(1) + c.val

c.val would end up as 1.

James




From nuffsaid at phreaker.net  Fri Jan 30 10:30:36 2004
From: nuffsaid at phreaker.net (Nuff Said)
Date: Fri, 30 Jan 2004 16:30:36 +0100
Subject: NEWLINE character problem
References: <mailman.1038.1075472177.12720.python-list@python.org>
Message-ID: <pan.2004.01.30.15.30.35.850176@phreaker.net>

On Fri, 30 Jan 2004 16:16:12 +0200, Dragos Chirila wrote:

> I have a string and I want to split it by NEWLINE character.
> 
> It is knowned that "Microsoft Windows, Apple's Macintosh OS and various
> UNIX, all use different characters to mark the ends of lines in text files.
> Unix uses the linefeed (ASCII character 10), MacOS uses the carriage return
> (ASCII character 13), and Windows uses a two-character sequence of a
> carriage return plus a newline". So, PLEASE don't tell me to use 'split' by
> '\n' because it won't work.
> 
> I know about the Python support, opening files with 'U' flag, for reading in
> universal newline mode. But this is not the case. My script receives a
> string, can be the content of a file text from Windows or Unix system. I
> want to make sure that I can split this string by NEWLINE character.

Say your string is s; then you could use the following 
function (untested!) to make sure that s uses \n only: 

    def fix_lineendings(txt):
        if txt.count('\r\n'):  # MS DOS
            txt = txt.replace('\r\n', '\n')
        elif txt.count('\r'):  # Mac
            txt = txt.replace('\r', '\n')
        
        return txt

Simply write: s = fix_lineendings(s)

HTH / Nuff



From bkelley at wi.mit.edu  Wed Jan 28 15:13:16 2004
From: bkelley at wi.mit.edu (Brian Kelley)
Date: Wed, 28 Jan 2004 15:13:16 -0500
Subject: Simple Database Package
In-Reply-To: <8089854e.0401280622.4e145267@posting.google.com>
References: <8089854e.0401280622.4e145267@posting.google.com>
Message-ID: <4018176c$0$564$b45e6eb0@senator-bedfellow.mit.edu>

Fuzzyman wrote:

> I'm looking to build a simple database application for use on the
> desktop (customer contact and feedback database).
> 
> Anyone able to reccomend a simple module / package I can use...  ?

You might think about SQLObject.  http://sqlobject.org/  It is basically 
an easy to program front end for various databases.

It can use SQLite and a whole bunch of other databases.  They even 
include the start for a contact database.  I have found it pretty easy 
to use.  Of course, you will also need a database backend like sqlite.

Brian



From ny_r_marquez at yahoo.com  Thu Jan  1 08:58:26 2004
From: ny_r_marquez at yahoo.com (R.Marquez)
Date: 1 Jan 2004 05:58:26 -0800
Subject: PythonWin problems
References: <z5GIb.10324$Vl6.2031681@news20.bellglobal.com>
Message-ID: <8a27e309.0401010558.598eb99c@posting.google.com>

The bug you are experiencing has been posted already in the "Python
for Windows Extensions" since 2003-08-08. See:
https://sourceforge.net/tracker/index.php?func=detail&aid=785374&group_id=78018&atid=551954

Also, a workaround was posted by another user on 2003-09-10.  See:
https://sourceforge.net/tracker/index.php?func=detail&aid=804178&group_id=78018&atid=551954

Why this has not been fixed yet is a good question.

-Ruben

"Colin J. Williams" <cjw at sympatico.ca> wrote in message news:<z5GIb.10324$Vl6.2031681 at news20.bellglobal.com>...
> PythonWin has been my favourite IDE for quite a while.
> 
> When one right clicks on a .py file in the Windows Explorer, among the 
> options are Open and Edit.  The former is the default and executes 
> Python, with the selected script.  The latter activates the PythonWin 
> editor, with the selected script.
> 
> Since, most frequently, I wish to edit the script, or execute it with 
> the debugger, I tried changing the default to Edit, using the Edit File 
> Type menu.
> 
> Unfortunately, this leads to a couple of problems:
> 
> 1. Any activity becomes horrendously slow, and
> 2. The following message appears:
>     LoadBarState failed - LoadBarState failed (with win32 exception!)
> [Dbg]>>>
> 
> Does anyone have a workaround suggestion?
> 
> Thanks.
> 
> Colin W.


From tim.golden at viacom-outdoor.co.uk  Tue Jan 27 03:53:17 2004
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Tue, 27 Jan 2004 08:53:17 -0000
Subject: winapi: mouseclick
Message-ID: <F1921F85572CB04D9F55B14BDC76B3E4434671@tdi_nt9.internal.viacom-outdoor.co.uk>

>-----Original Message-----
>From: KNS [mailto:netquest at sympatico.ca]
>Sent: 27 January 2004 08:19
>To: python-list at python.org
>Subject: Re: winapi: mouseclick
>
>
>
>Just to add some clarification, this is in fact a Python question.
>I'm just working within the Windows environment.  And, now that
>I'm here, I'm certain this is child's play for many of you, so
>a bit of help would be most welcomed.
>
>Thanks.
>
>KNS wrote:
>> 
>> Hello,
>> 
>> Can someone please suggest how to test for a mouse click using
>> the WinAPI?  I have dispatched a windows application and would
>> like to detect any mouseclicks (and keyboard entry for that 
>matter)...
>> 
>> Thanks.
>> 
>

<sigh>
Your question is not the most precise one I've ever seen. If
you have written a Windows app then you presumably understand
how the Windows messaging setup works. In which case, what
you need to do is to handle WM_LBUTTONDOWN and related messages. 

If you're not sure which messages to go for, look at this:

http://msdn.microsoft.com/library/en-us/winui/winui/windowsuserinterface/use
rinput.asp

which gives an overview.

There's an example of doing this kind of thing in Python
using the ctypes modules:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/208699

You can also do it with the win32all extensions from Mark
Hammonds pages:

http://starship.python.net/crew/mhammond/win32/Downloads.html

If this isn't really what you were asking, could you post a
segment of code showing what you're about and where you're
stuck?

TJG


________________________________________________________________________
This e-mail has been scanned for all viruses by Star Internet. The
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From fuf at mageo.cz  Fri Jan 30 06:33:38 2004
From: fuf at mageo.cz (Michal Vitecek)
Date: Fri, 30 Jan 2004 12:33:38 +0100
Subject: isinstance() bug
In-Reply-To: <20040129170037.GF18498@unpythonic.net>
References: <E1AmFB0-0004sv-El@mail.python.org>
	<20040129170037.GF18498@unpythonic.net>
Message-ID: <20040130113338.GA992@foof.i3.cz>

Jeff Epler wrote:
[snip]
>So I guess that makes me at least -6 if I get a vote for each problem
>I can imagine.

 uff - that was an exhaustive reasoning. thank you Jeff :)

-- 
		fuf		(fuf at mageo.cz)



From arian.novruzi at mathstat.uottawa.ca  Thu Jan 15 09:13:05 2004
From: arian.novruzi at mathstat.uottawa.ca (A. Novruzi)
Date: 15 Jan 2004 06:13:05 -0800
Subject: Can MayaVi visualize 3D functions in an unstructured grid ?
Message-ID: <11d4728b.0401150613.1bfb4ca3@posting.google.com>

Hi, 

I am looking for a free 3D visualization software, running in Linux,
and able to visualize 3D functions in nonstructured mesh (basically,
my mesh is a set of thetraheders used for some 3D FE computations).

Can anyone confirm that indeed MayaVi can visualize 3D functions in
nonstructured mesh? I went through the manuals but I didn't find that
MayVi can do so.

Thank you,
Arian Novruzi


From Mike at DeleteThis.Geary.com  Mon Jan 19 22:27:53 2004
From: Mike at DeleteThis.Geary.com (Michael Geary)
Date: Mon, 19 Jan 2004 19:27:53 -0800
Subject: Launching Wordpad on Windows
References: <buhtvp$l0j$1@news.Stanford.EDU>
	<sE0Pb.15907$q4.10777@newsread3.news.atl.earthlink.net>
Message-ID: <100p81q3kshsuca@corp.supernews.com>

> > I'm trying to find a clean way to launch a Wordpad
> > editor on Windows.  By "clean", I mean that it should
> > work on as many versions of Windows as possible,
> > and it shouldn't require installing any extra software.
> >  I assume everyone has win32api and its friends.
> >
> > The problem is to find the path to wordpad.exe.  At
> > first I just copied the path from my XP machine:
> > c:\Program Files\Windows NT\Accessories\WORDPAD.EXE
> >
> > I verified that the same path works on W2K, but I
> > don't know about older versions.

Never hard code a path like that. It definitely won't work on all versions
of Windows. It won't even work on all XP systems. The Program Files
directory isn't always on the C: drive!

> > With some labor I was able to come up with a
> > longer, more obfuscated bit of code:
> >
> > [code using the App Paths registry key]
> >
> > I would like to solicit learned opinions about this.
> > Which version will work in more versions of
> > Windows?  Is there a better approach?

You can do it with App Paths, but that's way too much work. It's not the
Windowsonic way to do it. :-)

> This works for me:
> (Using WinXP Pro)
>
> >>> import os
> >>> os.system("start wordpad")
> 0
>
> Hope this helps.

I wouldn't recommend os.system. The problem is that it starts a command
shell. You didn't notice this because you're testing from a console window,
so the secondary command shell runs in the same console window you're
already using. But if you put this code in a non-console app, it will open a
new console window in addition to the WordPad window. That window will close
right away because you're using the 'start' command, but it's extra screen
activity you don't want.

So what's the right way to do it? The underlying Windows function you're
looking for is ShellExecute(). That's the easiest way to launch an app. It
knows all about App Paths and the environment PATH. It's the same function
that gets called if you do a Start/Run... in the Windows UI.

You can use win32api.ShellExecute, or better yet, the os.startfile function
calls ShellExecute, so you don't even need win32api:

>>> import os
>>> os.startfile('wordpad.exe')

-Mike




From andymac at bullseye.apana.org.au  Sun Jan 25 19:17:21 2004
From: andymac at bullseye.apana.org.au (Andrew MacIntyre)
Date: Mon, 26 Jan 2004 11:17:21 +1100 (EST)
Subject: xrange not hashable - why not?
In-Reply-To: <20040125144724.GA13741@nl.linux.org>
References: <20040125144724.GA13741@nl.linux.org>
Message-ID: <20040126105606.F83014@bullseye.apana.org.au>

On Sun, 25 Jan 2004, Gerrit Holl wrote:

> why is an xrange object not hashable?

xrange() returns an iterator.  iterators seem universally unhashable,
probably because they can't be deemed "concrete", though I can't find
anything in the 2.3.3 docs about this - perhaps the relevant PEPs might.

> I was trying to do something like:
>
> comments = {
>     xrange(0, 4): "Few",
>     xrange(4, 10): "Several",
>     xrange(10, 100): "A lot",
>     xrange(100, sys.maxint): "Can't count them"}
> for (k, v) in comments.items():
>     if n in k:
>         commentaar = v
>         break

Even if it worked, there's a nasty performance trap in the sys.maxint
case: if the sys.maxint case is the first returned by the items() method
call and n < 100, the "in" will evaluate the sys.maxint xrange iterator.

Without more info, I don't see why a dictionary is that useful in this
case, so I would actually write the above as:

comments = (((0, 4), "Few"),
            ((4, 10), "Several"),
            ((10, 100), "A lot"))
commentaar= "Can't count them"
for (k, v) in comments:
     if n in xrange(*k):
         commentaar = v
         break

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



From jacek.generowicz at cern.ch  Tue Jan 13 08:14:38 2004
From: jacek.generowicz at cern.ch (Jacek Generowicz)
Date: 13 Jan 2004 14:14:38 +0100
Subject: Python is far from a top performer according to benchmark
	test...
References: <ryELb.238$tK2.228@amstwist00>
	<6ee58e07.0401092129.302cb9d4@posting.google.com>
	<pan.2004.01.11.06.08.18.867825@yahoo.com>
	<bttu62$gdh$1@newstree.wise.edt.ericsson.se>
	<btvsvl$pu7$1@panix3.panix.com>
	<95aa1afa.0401130424.49749912@posting.google.com>
Message-ID: <tyf65fgdm81.fsf@pcepsft001.cern.ch>

michele.simionato at poste.it (Michele Simionato) writes:

> But it is successful! Look at people working on AI, theory of programming
> languages, etc: they will (presumably) know Lisp. OTOH, look at people
> working on number crunching: they will (presumably) know Fortran.
> It turns out that the number of people working on numerical analysis (or 
> using numerical tools) is much larger than the number of people working on 
> abstract things, so you will have more people knowing Fortran than people 
> knowing Lisp. But this fact alone does not mean that one language is more
> successfull than the other in its application niche. You could compare
> Python and Perl (or Ruby) and say that one is more successful than
> the other, but Lisp and Fortran have different audiences and you cannot 
> estimate their success just as number of users.

Lest anyone infer that Lisp has an "application niche" consisting of
AI and theory of programming languages ... take a look at

  http://www.franz.com/success/

and glance at the column on the left.

I suspect that Aahz' working definition of "successful" had more to do
with success in terms of popularity, rather than success in terms of
technical excellence: please remember that quality and popularity are
very weakly correlated.

If you want to analyze the popularity of a technology, you will get
far better insight by studying the sociological and historical
contexts surrounding it rather then its actual technical merits.

For example, how many readers of this post will be surprised to learn
that (most) Common Lisp implementations compile to efficient native
machine code, that Common Lisp has an ANSI standard which includes
very powerful support for object-oriented programming (to name but two
features that everybody "knows" it doesn't have) ?

Go on, raise your hand if you thought that "Lisp" is a slow,
interperted functional langugage.

You will need to take, amongst many other things, the abundance of
such (non-)facts into consideration, if you want to understand Lisp
lack of "success".

Similarly, the "success" of C++ probably has more to do with having
introduced OOP to the C programmers of the world, that with its
suitability for doing OOP.

--
...Please don't assume Lisp is only useful for Animation and Graphics,
AI, Bioinformatics, B2B and E-Commerce, Data Mining, EDA/Semiconductor
applications, Expert Systems, Finance, Intelligent Agents, Knowledge
Management, Mechanical CAD, Modeling and Simulation, Natural Language,
Optimization, Research, Risk Analysis, Scheduling, Telecom, and Web
Authoring just because these are the only things they happened to
list.                                                  -- Kent Pitman


From luc.saffre at gmx.net  Sat Jan 24 07:33:17 2004
From: luc.saffre at gmx.net (Luc Saffre)
Date: Sat, 24 Jan 2004 14:33:17 +0200
Subject: "Bad file descriptor" after py2exe or Installer
In-Reply-To: <fzf3l0zf.fsf@python.net>
References: <3FD8B25A.7080103@gmx.net> <r7zb6owi.fsf@python.net>
	<3FD97E83.2000703@gmx.net> <y8ti5f2h.fsf@python.net>
	<3FDDCE47.2000708@gmx.net> <fzf3l0zf.fsf@python.net>
Message-ID: <4012660D.3050809@gmx.net>

On 30/12/2003 0:20, Thomas Heller wrote:

> Luc Saffre <luc.saffre at gmx.net> writes:
>>I would consider this as a bug (in both py2exe and Installer) since
>>they decide to pick some cygwin tcl/tk dll's who happen to hang around
>>while the Python runtime won't...
> 
> 
> This is part of the code (in build_exe.py).
> 
>     def find_dependend_dlls(self, use_runw, dlls, pypath, dll_excludes):
>         import py2exe_util
>         sysdir = py2exe_util.get_sysdir()
>         windir = py2exe_util.get_windir()
>         # This is the tail of the path windows uses when looking for dlls
>         # XXX On Windows NT, the SYSTEM directory is also searched
>         exedir = os.path.dirname(sys.executable)
>         syspath = os.environ['PATH']
>         loadpath = ';'.join([exedir, sysdir, windir, syspath])
> 
>         # Found by Duncan Booth:
>         # It may be possible that bin_depends needs extension modules,
>         # so the loadpath must be extended by our python path.
>         loadpath = loadpath + ';' + ';'.join(pypath)
> 
> Can you try to change the last line into
> 
>         loadpath = ';'.join(pypath) + ';' + loadpath
> 
> and report if this helps?

Yes, this fixed the bug. Here is my test report:

1. I reproduced the bug by running a build with cygwin's tcltk package 
installed: again, some part of cygwin had been grabbed. This time 
however the behaviour was that the test.exe got stucked completely, 
needing to be killed using TaskManager. This difference may come because 
I upgraded meanwhile my copy of Cygwin.

2. I modified the line in build_exe.py as described.

3. Now the produced .exe runs well in both cases (tcltk installed during 
build or not)

Sorry for the long delay before testing this.

Luc


From antonmuhin at rambler.ru  Tue Jan 20 13:32:25 2004
From: antonmuhin at rambler.ru (anton muhin)
Date: Tue, 20 Jan 2004 21:32:25 +0300
Subject: simple class question
In-Reply-To: <bujorn$u9g$1@ucsnew1.ncl.ac.uk>
References: <bujorn$u9g$1@ucsnew1.ncl.ac.uk>
Message-ID: <bujsd7$iot2m$1@ID-217427.news.uni-berlin.de>

C GIllespie wrote:
> Dear all,
> 
> I'm new to both python and OOP, so could I ask a simple question.
> 
> I have class:
> 
> class species:
>     __init__(self,pop=0):
>         self.pop=pop
> 
> Now I want to do something like this:
> 
> X=species(pop=10)
> Y=species(pop=X.pop)
> OK, but now I want to update X.pop and have that mirrored in Y.pop, i.e. if
> X.pop=5, Y.pop now equals 5.
> 
> What is the best/nicest/simplest way of doing this?
> 
> Many thanks
> 
> Colin
> 
> 

In some cases pop should be class attribute.

regards,
anton.


From tchur at optushome.com.au  Mon Jan 19 17:57:58 2004
From: tchur at optushome.com.au (Tim Churches)
Date: Tue, 20 Jan 2004 09:57:58 +1100
Subject: Python and random oracles
Message-ID: <200401192257.i0JMvw101524@mail011.syd.optusnet.com.au>

An embedded and charset-unspecified text was scrubbed...
Name: not available
URL: <http://mail.python.org/pipermail/python-list/attachments/20040120/f2ede09d/attachment.ksh>

From tjreedy at udel.edu  Mon Jan 26 18:30:32 2004
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 26 Jan 2004 18:30:32 -0500
Subject: How does compare work?
References: <40158680$0$7044$ba620e4c@news.skynet.be>
Message-ID: <bv47u8$kgm$1@sea.gmane.org>


"Helmut Jarausch" <jarausch at skynet.be> wrote in message
news:40158680$0$7044$ba620e4c at news.skynet.be...
> what does Python do if two objects aren't comparable (to my opinion)

Sorry, Python does what it does, which is generally to compare any two
objects unless explicitly disabled as with complex numbers or in
user-written method of user class.

> If I've understood "Python in a Nutschell" correctly it should raise an
> exception but it doesn't do for me.

Perhaps you could quote the line that mislead you, and someone could
explain, or suggest a change to the author.

Terry J. Reedy






From fBechmann at web.de  Sat Jan 24 14:04:39 2004
From: fBechmann at web.de (Frank Bechmann)
Date: 24 Jan 2004 11:04:39 -0800
Subject: closing database connections
References: <71fd0ae5.0401230838.309e9b02@posting.google.com>
Message-ID: <dbc00a99.0401241104.b832994@posting.google.com>

there are two extra features to be taken into account when working
with database-connections (assuming you are working on problems that
require non-sequential DB-access):

as already mentioned DB-connections are valuable resources, they are
not only limited, their creation also is performance-relevant. so
quite soon you will find yourself working w/ connection pooling.

even more complicated are transactional problems because connections
"wrap" transactions; so there might be times when you must make sure
that consequent calls to the DB use the same transaction whereas in
other cases you need to access the DB with parallel but isolated
transactions.

So in conclusion I don't think that there is just one golden rule for
DB-connection creation and release, your golden rule will most of the
time be golden just for your actual problem.


From Mike at DeleteThis.Geary.com  Thu Jan 22 01:22:40 2004
From: Mike at DeleteThis.Geary.com (Michael Geary)
Date: Wed, 21 Jan 2004 22:22:40 -0800
Subject: How to disable dos shell window popup for os.system call
References: <aa24ae0d.0401211927.7a91786@posting.google.com>
Message-ID: <100ur1n93l4smf0@corp.supernews.com>

Peter Gordon wrote:
> When I try to execute another program, the dos command shell
> window pops up with the application. For example:
> os.system("notepad") brings up the notepad but I also get the
> command shell window. How do I prevent command shell
> window to open?

Wow, this seems to be the question of the week! (Third time in three days.)

Use os.startfile.

-Mike




From nospam-deets at web.de  Mon Jan  5 10:09:56 2004
From: nospam-deets at web.de (Diez B. Roggisch)
Date: Mon, 05 Jan 2004 16:09:56 +0100
Subject: Pyserial question
References: <mailman.104.1073318354.12720.python-list@python.org>
Message-ID: <btc1sv$5g16a$1@ID-111250.news.uni-berlin.de>

Hi,

> I am using Pyserial to work with a RS232 device.  My question is, how do I
> write hex to the device or cannot write hex to it pyserial?

Look into the module struct - it will allow you to convert arbitrary data to
strings representing this data as binary string. Then you simply write that
to the serial connection. Reading is the same. I used that sucessfully for
a Vernier LabPro.

Regards,

Diez


From none at none.com  Thu Jan 15 10:12:23 2004
From: none at none.com (Derek)
Date: Thu, 15 Jan 2004 10:12:23 -0500
Subject: I come not to bury C++, but to praise it...
References: <mailman.337.1074032524.12720.python-list@python.org>
	<bu1uul$cam92$1@ID-46268.news.uni-berlin.de>
	<cu%Mb.47396$8H.99443@attbi_s03>
	<bu3khe$dbm5v$1@ID-46268.news.uni-berlin.de>
	<mailman.356.1074094662.12720.python-list@python.org>
	<bu408b$d67fm$1@ID-46268.news.uni-berlin.de>
	<87ad4qrmut.fsf@pobox.com>
Message-ID: <bu6ako$e61sb$1@ID-46268.news.uni-berlin.de>

"John J. Lee" wrote...
> [...]
> > Maybe I didn't make myself clear.  I counted the ease
> > with which memory can be corrupted in C++ as a minus for
> > C++ and a plus for Python.  I agree with you.
>
> No, you don't (assuming I understand Jp's post), because...
>
> > On the flip side, C++ can catch errors immediately that
> > Python will not complain about until runtime, and in this
> > imperfect world tests may not catch all such errors up
> > front.  In this respect I consider C++ safer.
>
> ...you made no evaluation of the relative importance of
> these two qualities (memory-safety and static type-safety).
> Nor of the fact that C++ comes unavoidably packaged with the
> more-lines-of-code-per-function-point anti-feature -- KIS!

Are you joking?  Because if you have some magical way to assign a
meaningful relative importance to unrelated language features that is
sufficiently general to be useful, I'd like to hear it.

For *me* memory safety in C++ is not an issue.  I use range-checked
containers, scoped pointers, shared pointers, etc. and don't encounter
memory management/safety problems.

For *me* the lack of static type safety in Python is an issue.  We
have a lot of developers working on a relatively large Python
codebase, and sooner or later some edge case calls a function with an
argument who's type makes no sense.  Sometimes tests catch the problem
early, sometimes they don't.








From tomas at fancy.org  Thu Jan 15 03:14:36 2004
From: tomas at fancy.org (Tom Plunket)
Date: Thu, 15 Jan 2004 00:14:36 -0800
Subject: The GPL / BSD cultural divide (was ProtoCiv: porting Freeciv to
	Python CANNED)
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<n22Nb.11299$9k7.210522@news.xtra.co.nz>
	<bu2pgs$d123a$1@ID-207230.news.uni-berlin.de>
	<4004EC9E.1E2E2893@alcyone.com> <bu3iv2$n2u$4@tyfon.itea.ntnu.no>
	<bu4dii$daqjq$1@ID-207230.news.uni-berlin.de>
Message-ID: <atic005o6mimsngaods5bf24opav75t29j@4ax.com>

Brandon J. Van Every wrote:

> Agreed, and more specifically, there is a huge *cultural divide* between
> most OSS developers and proprietary commercial developers who simply want to
> add some OSS "to get the boring bits over with."  There are also huge
> cultural divides between Linux and Windows developers, and again between
> commercial game developers and hobbyist game developers.

So why waste their time even asking if they would consider
aligning their goals with yours?  That seems like the ridiculous
part- OF COURSE hobbyists are not going to want to take
commercial concerns into account, THAT'S THE POINT.

-tom!


From skip at pobox.com  Fri Jan 30 07:38:40 2004
From: skip at pobox.com (Skip Montanaro)
Date: Fri, 30 Jan 2004 06:38:40 -0600
Subject: mod_speling for python
In-Reply-To: <bvd514$3bv$1@news.service.uci.edu>
References: <9d1c4d6d.0401282106.d69b2c5@posting.google.com>
	<bvd514$3bv$1@news.service.uci.edu>
Message-ID: <16410.20560.586092.371558@montanaro.dyndns.org>


    >> I know there are drawbacks, disadvantages, this is "evil", etc.  I
    >> only wanted to know what ways there are to add such a hook if it is
    >> possible without altering the C source for python itself.

    Josiah> Ambiguities during execution are bad.  I've got two functions
    Josiah> Foo and foO, if I type in foo, what did I mean?

I didn't interpret the OP's question as wanting to automatically map Foo to
foO, but to give the user a more helpful error message, suggesting other
candidate names which he might have mistyped.

Skip



From rays at blue-cove.com  Fri Jan 30 19:15:30 2004
From: rays at blue-cove.com (Ray Schumacher)
Date: Fri, 30 Jan 2004 16:15:30 -0800
Subject: win32com - .ocx won't Dispatch...
In-Reply-To: <bveq1n$1eqh$2@arachne.labyrinth.net.au>
References: <mailman.1004.1075413376.12720.python-list@python.org>
	<mailman.962.1075345407.12720.python-list@python.org>
	<mailman.1004.1075413376.12720.python-list@python.org>
Message-ID: <5.2.0.4.2.20040130161335.07032450@blue-cove.com>

At 10:40 AM 1/31/2004 +1100, Mark Hammond wrote:
>Ray Schumacher wrote:
>
>>So, the util class Dispatches, but all calls (properties and functions) 
>>give 'Catastrophic failure'
>>Is this really some sort of types problem with this OCX?
>>"pywintypes.com_error: (-2147418113, 'Catastrophic failure', None, None)"
>
>My guess is that your OCX is a true OCX, and therefore needs a full GUI 
>environment.  Pythonwin can host these - see the pythonwin\pywin\demos\ocx 
>directory, and modify one of these to suit. wxPython can also apparently 
>host OCX controls in a similar way, but I have no details.

Thank you Mark, I'll look into it next week, for now, I got the DLL drivers 
to work with ctypes.

I'll post examples soon.

Cheers,

Ray




From abulka at netspace.net.au  Wed Jan  7 01:18:07 2004
From: abulka at netspace.net.au (Andy Bulka)
Date: 6 Jan 2004 22:18:07 -0800
Subject: UML tools for python
References: <13dc97b8.0312301543.39192aa2@posting.google.com>
	<slrnbvisrm.3oo.alf@largo.fayauffre.org>
	<13dc97b8.0401051848.11205ed4@posting.google.com>
	<slrnbvkorj.tl.alf@largo.fayauffre.org>
Message-ID: <13dc97b8.0401062218.71e5616@posting.google.com>

Alexandre Fayolle <alf at calvin.fayauffre.org> wrote in message 
> Well, not necessarily. Of course I can only speek for myself (and a bit
> for my company), but my prefered UML modelling tool is a whiteboard,
> used in conjunction with Agile Modelling practices
> (http://www.agilemodeling.com). And even then I tend to model lightly,
> because the projects on which I work are generally fast moving targets,
> which means that heavy up front modelling often results in waisted effort. 

Thanks for sharing how you work with regards to UML.  

I too use many Agile and XP practices - UML tends to get used in
initial designs and in especially when communicating between
programmers.  Some long term documentation of important sub-systems
exists in UML too.

> We found that on demand modelling sessions on the whiteboard to answer
> specific questions provided the best results. The code we produce ends
> up being refactored very often as requirements change anyway, and
> maintaining up to date models costs us too much time.

If we had two-way tools for Python, then maintaining your models would
not take up any time!  ;-)

For example, when I used to use Delphi (object pascal) a lot, I had a
two way tool called ModelMaker http://www.modelmakertools.com. I used
to do some modelling in UML, then switch to coding and compiling, then
back to UML, then back to coding and refactoring.  Delphi + ModelMaker
cooperated seamlessly so that the UML was always up to date, as was
the code.  It was a dream come true.  I always had UML diagrams of
everything, and they never went out of date.

TogetherJ  http://www.togethersoft.com/products/index.jsp also works
like this.

P.S. Ideally such a tool would be free, but I would happily pay for
such a tool too.  E.g. If Borland built something like PyBuilder - a
rock and roll solid IDE with GUI layout tools, refactoring support and
UML - I would certainly lay down my cash.

Andy Bulka
http://www.atug.com/andypatterns


From maoy at cis.upenn.edu  Sun Jan 18 23:00:25 2004
From: maoy at cis.upenn.edu (Yun Mao)
Date: Sun, 18 Jan 2004 23:00:25 -0500
Subject: secure unpickle?
Message-ID: <bufkot$96vl$1@netnews.upenn.edu>

Hi, I'm looking for a way in unpickling, or equivalent, such that can only
unpickle (or is limited to) simple data structure, such as number, string,
list, tuples.

The doc I found http://www.python.org/doc/2.2.3/lib/pickle-sec.html was
helpful but still not very clear to me.

Thanks!

-Y




From donn at u.washington.edu  Fri Jan  2 13:50:35 2004
From: donn at u.washington.edu (Donn Cave)
Date: Fri, 02 Jan 2004 10:50:35 -0800
Subject: Problem building on BeOS...
References: <NLhJb.31440$I07.78784@attbi_s53>
	<bt4a9t$13e4$1@ulysses.news.tiscali.de>
	<f8iJb.42537$xX.145398@attbi_s02>
Message-ID: <donn-8FEA6E.10503502012004@nntp1.u.washington.edu>

In article <f8iJb.42537$xX.145398 at attbi_s02>,
 Zoo Keeper <candiazoo at comcast.net> wrote:

> Thanks for the reply!  I checked in my editor (pe) and it indicates just a
> carriage return at the end of the line (visibles and tab stops on).

I've never used pe.  I would hope it doesn't do that, but to say
for sure I'd run the file through "od".  Like,
  $ fgrep '\' arrayobject.h | od -a

If you see anything between "\" and "nl", that's your problem.

   Donn Cave, donn at u.washington.edu


From tim.one at comcast.net  Sun Jan 11 14:00:37 2004
From: tim.one at comcast.net (Tim Peters)
Date: Sun, 11 Jan 2004 14:00:37 -0500
Subject: Databases: Which one's right for me?
In-Reply-To: <9a6d7d9d.0401110958.693e30d1@posting.google.com>
Message-ID: <LNBBLJKPBEHFEDALKOLCIENDIEAB.tim.one@comcast.net>

[Aaron Watters]
> BTW, I would like to see somewhere an explanation of how
> ZODB concurrency control and recovery work.  Please inform if
> there is some information.  I'm not encouraged by the fact that
> in what documentation I can find the definitions are not the
> standard ones.

Of course you're much more likely to get a useful discussion of this on a
ZODB list, like <mailto:zodb-dev at zope.org>.

"The standard" ones aren't all that standard.  ANSI SQL-92 defines multiple
isolation levels, and they've been (I think) fairly critiqued as  incomplete
and partly ambiguous; e.g.,

    A Critique of ANSI SQL Isolation Levels
    Hal Berenson, et al.
    http://citeseer.nj.nec.com/berenson95critique.html

To complicate matters, as Jeremy says here:

    http://www.python.org/~jeremy/weblog/030514.html

    ZODB uses optimistic concurrency control.  It can be hard to
    describe what isolation guarantees it provides, because optimistic
    implementations don't map naturally onto the ANSI isolation levels.

Jeremy's blog there also contains links to more recent papers.

To complicate matters more (in theory, but nicer in practice for most uses),
ZODB 3.3 introduces so-called Multiversion Concurrency Control as default
behavior:

    http://zope.org/Wikis/ZODB/MultiVersionConcurrencyControl




From hlubocky at uiuc.edu  Tue Jan 13 11:58:51 2004
From: hlubocky at uiuc.edu (Brian Hlubocky)
Date: 13 Jan 2004 08:58:51 -0800
Subject: Py2Exe and Outlook (array bounds change!?)
Message-ID: <982e9537.0401130858.4d37dae5@posting.google.com>

This one is really puzzling me. I am not that familiar with COM or
py2exe, but I have tested this a fair amount and am pretty sure of
what I am about to explain. The MSDN website says that the item list
in Outlook has array bounds from 1 to length. Using this information,
I wrote a program that adds contacts to outlook using an external
database. When I went to try this out with py2exe however, I got an
exception.

What I found out is that when using py2exe, the bounds on the items
list changes from 1 to len, to 0 to len-1. Does anyone have any idea
why this might be? It seems goofy that this would happen. Testing is
on the developer machine, so I don't think different dlls could be the
problem. Thanks!

--Brian


From pythongnome at hotmail.com  Thu Jan 29 20:09:13 2004
From: pythongnome at hotmail.com (Lucas Raab)
Date: Fri, 30 Jan 2004 01:09:13 GMT
Subject: Easy way to make EXEs...
References: <NMDRb.28013$i4.26542@newsread1.news.atl.earthlink.net>
	<4017C45F.D7501215@engcorp.com>
	<yzhSb.1910$jH6.736@newsread1.news.atl.earthlink.net>
Message-ID: <Z8iSb.1963$jH6.1335@newsread1.news.atl.earthlink.net>


"Xero Limit 126" <xerolimit126 at earthlink.net> wrote in message
news:yzhSb.1910$jH6.736 at newsread1.news.atl.earthlink.net...
> "What don't you understand about py2exe?  How it works, or how to actually
> execute it?  Or something else?  If you have trouble with it, perhaps
there
> could be some improvements in the documentation...  but nobody will know
> unless you help us figure out what the problem is.
>
> -Peter"
>
>
> Okay, I created the following setup file:
>
> --- file setup.py
> from distutils.core import setup
> import py2exe
>
> setup(
> console = ["calculator1.py"],
> )
>
> Then, I get the following error:
>
> -------------------------------
> Traceback (most recent call last):
>   File "C:/WINDOWS/Desktop/Programming/Python/Programs/setup", line 4, in
?
>     setup(
>   File "C:\WINDOWS\DESKTOP\PROGRAMMING\PYTHON\BASE\lib\distutils\core.py",
> line 137, in setup
>     raise SystemExit, gen_usage(dist.script_name) + "\nerror: %s" % msg
> SystemExit: usage: setup [global_opts] cmd1 [cmd1_opts] [cmd2 [cmd2_opts]
> ...]
>    or: setup --help [cmd1 cmd2 ...]
>    or: setup --help-commands
>    or: setup cmd --help
>
> error: no commands supplied
> --------------------------
>
> I also get a pop up window to the effect "Do you want to exit all
together,
> Yes/No"...
>
> I have a feeling that Im just inputing somthing incorectly, or I have
> somthing installed incorrectly...
>
> (Sorry for not going too indepth before)
>
>
I believe you have to go to the command prompt or whatever you're using, go
to the directory where the file is located, and type (not the quotation
marks): "python setup.py py2exe"




From http  Sat Jan  3 04:09:04 2004
From: http (Paul Rubin)
Date: 03 Jan 2004 01:09:04 -0800
Subject: Creating a capabilities-based restricted execution system
References: <LmmdnUn4seDeGWuiXTWc-w@speakeasy.net>
Message-ID: <7xznd58klr.fsf@ruckus.brouhaha.com>

"Sean R. Lynch" <seanl at chaosring.org> writes:
> Does anyone think I'm going in completely the wrong direction here? Am
> I missing anything obvious?

Well, I have a dumb question.  Have you studied the security failures
of rexec/Bastion and convinced yourself that they don't happen to your
new scheme?

You might look at the PyPy architecture doc if you haven't yet.
Making a separate object space for restricted objects may fit PyPy's
design quite naturally.


From try_vanevery_at_mycompanyname at yahoo.com  Thu Jan 15 00:05:01 2004
From: try_vanevery_at_mycompanyname at yahoo.com (Brandon J. Van Every)
Date: Wed, 14 Jan 2004 21:05:01 -0800
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
	<K_YMb.10994$9k7.204413@news.xtra.co.nz>
	<bu1qq3$cu440$1@ID-207230.news.uni-berlin.de>
	<n22Nb.11299$9k7.210522@news.xtra.co.nz>
	<bu2pgs$d123a$1@ID-207230.news.uni-berlin.de>
	<4004EC9E.1E2E2893@alcyone.com>
	<23891c90.0401140223.344b22af@posting.google.com>
	<100bbb6kj9m03a4@corp.supernews.com>
	<bu4cdk$cv09p$1@ID-207230.news.uni-berlin.de>
	<TQiNb.12052$9k7.227216@news.xtra.co.nz>
Message-ID: <bu56ce$dtj3d$1@ID-207230.news.uni-berlin.de>


"Peter Ashford" <me at here.there.com> wrote in message news:TQiNb.12052
> Brandon wrote:
> >
> > Is there something fundamentally *wrong* with recognizing how useless
people
> > are to your purposes?
>
> *Recognising* that people aren't useful for your purposes is sensible.
> *Criticising* people for not being useful for your purposes when they've
> never claimed or aspired to be is dumb.

Why?  I see no a priori reason whatsoever for your statement.  It depends on
one's own purposes, on their purposes, and what actually happens as a result
of the criticism.

-- 
Cheers,                     www.indiegamedesign.com
Brandon Van Every           Seattle, WA

20% of the world is real.
80% is gobbledygook we make up inside our own heads.




From jepler at unpythonic.net  Mon Jan 26 22:34:56 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Mon, 26 Jan 2004 21:34:56 -0600
Subject: Python on portable storage
In-Reply-To: <slrnc1bj85.lot.bignose-hates-spam@iris.polar.local>
References: <slrnc1bj85.lot.bignose-hates-spam@iris.polar.local>
Message-ID: <20040127033456.GA24260@unpythonic.net>

One idea would be a directory structure that looks like the source tree:

python23/python         # linux executable
python23/python.exe     # windows executable
python23/Lib            # shared version of /usr/lib/python2.3
python23/Lib/site.py    # modify this to add any extra tweaks needed for
                        # things to work properly (it's loaded very early)
python23/Lib/plat-linux # linux shared-object modules
python23/Lib/plat-win32 # win32 shared-object modules

In this setup, you are assuming some set of Linux shared objects, use
ldd to find out which.  (A script setting LD_LIBRARY_PATH to point at
necessary libraries before calling python could help here)

If you want to support multiple Unix architectures, make python a
shell script, and include multiple python.ARCH binaries.  Have the shell
script determine the architecture, and then exec python.ARCH with
arguments intact.  This should not affect the way Python determines the
default sys.path.

I don't know much about windows .dll requirements or how to resolve
problems there.

Jeff



From josecarlos at siadv.com  Mon Jan 26 15:04:05 2004
From: josecarlos at siadv.com (José Carlos)
Date: Mon, 26 Jan 2004 21:04:05 +0100
Subject: part string to block of information
Message-ID: <bv3rro$mp6$1@nsnmrro2-gest.nuria.telefonica-data.net>

Hi.

How can i part a big string to block of information of (4Kb for example).?
i?m trying send it from a socket client to server and how can i calculate
the time it?s coming.

Thank you.

Regards.

Jos? Carlos
www.siadv.com





From gerrit at nl.linux.org  Fri Jan 16 11:26:59 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Fri, 16 Jan 2004 17:26:59 +0100
Subject: PEP for new modules (I read PEP 2)
In-Reply-To: <bu84lk$lra$02$1@news.t-online.com>
References: <mailman.419.1074203028.12720.python-list@python.org>
	<bu84lk$lra$02$1@news.t-online.com>
Message-ID: <20040116162659.GA4378@nl.linux.org>

"Martin v. L?wis" wrote:
> Christoph Becker-Freyseng wrote:
> >So basically I want to relocate the real Specification, because the more 
> >specific it gets the more it looks like a documentation and the prePEP 
> >grows and grows ...
> >
> >
> >Is this a valid option for a PEP?
> 
> If you are asking: "Can we have an implementation before we write the 
> PEP?", the answer is "Certainly, yes".

I don't think that's what we're asking. The question is: what level of
detail should the "Specification" part of the PEP have? The highest
level of detail is the full documentation - but that would mean the PEP
would be to large. Is it allowed to link the documentation - even if it
is docuemntation for a not-yet-existing module - as the specification?

> The PEP procedure is designed to avoid wasting efforts in implementing
> ideas that have no chance to ever get accepted to the Python core.
> If this is no concern for you (i.e. you are willing to accept the risk
> of wasting efforts), you can certainly implement the thing, wait for
> user feedback, and then write the PEP.

Hmm, the earlier discussion did show there certainly is a chance it will
ever get accepted, so that's not really the problem. But there are a lot
of ways to do a Path class, and we don't want to spend too much effort
into way A if way B has a lot more chance to be accepted.

yours,
Gerrit.

P.S.
Even a rejected PEP is not a waste of time: one can learn a lot from
writing a PEP, and gets one name on the PEP-list ;-)

-- 
124. If any one deliver silver, gold, or anything else to another for
safe keeping, before a witness, but he deny it, he shall be brought before
a judge, and all that he has denied he shall pay in full.
          -- 1780 BC, Hammurabi, Code of Law
-- 
PrePEP: Builtin path type
    http://people.nl.linux.org/~gerrit/creaties/path/pep-xxxx.html
Asperger's Syndrome - a personal approach:
	http://people.nl.linux.org/~gerrit/english/



From klaus.oberpichler at freenet.de  Sat Jan 10 16:21:22 2004
From: klaus.oberpichler at freenet.de (Klaus Oberpichler)
Date: Sat, 10 Jan 2004 22:21:22 +0100
Subject: Newbie question on self in classes
Message-ID: <btpqcr$m5d$1@news.gatel.net>

Hello Python community,

my simple question is: When is the self reference to a class valid?
During playing around with python I got the following error message:

>>> class Test:
...  value = 1000
...  self.value = 2
...
Traceback (most recent call last):
  File "<interactive input>", line 1, in ?
  File "<interactive input>", line 3, in Test
NameError: name 'self' is not defined

When I do it a different way no error occurs:

>>> class Test:
...  value = 1000
...  def f(self):
...   self.value = 2
...
>>>

When is the reference to its own class is generated and valid? What is the
reason bihind that behaviour?

Best regards
Klaus




From http  Tue Jan  6 15:58:38 2004
From: http (Paul Rubin)
Date: 06 Jan 2004 12:58:38 -0800
Subject: Iterating over a binary file
References: <btf5j8$6g26f$1@ID-46268.news.uni-berlin.de>
Message-ID: <7xznd04ww1.fsf@ruckus.brouhaha.com>

"Derek" <none at none.com> writes:
> f = file(filename, 'rb')
> data = f.read(1024)
> while len(data) > 0:
>     someobj.update(data)
>     data = f.read(1024)
> f.close()
> 
> The above code works, but I don't like making two read() calls.  Any
> way to avoid it, or a more elegant syntax?  Thanks.

You can make it even uglier:

    f = file(filename, 'rb')
    while 1:
      data = f.read(1024)
      if len(data) <= 0:
        break
      someobj.update(data)
    f.close()

There's been proposals around to add an assignment-expression operator
like in C, so you could say something like

    f = file(filename, 'rb')
    while len(data := f.read(1024)) > 0:
      someobj.update(data)
    f.close()

but that's the subject of holy war around here too many times ;-).  Don't
hold your breath waiting for it.


From jeffplus at comcast.net  Sun Jan  4 15:06:23 2004
From: jeffplus at comcast.net (Jeff Schwab)
Date: Sun, 04 Jan 2004 15:06:23 -0500
Subject: Text-to-HTML processing program
In-Reply-To: <slrnbvf8jf.62c.philh@cabalamat.cabalamat.org>
References: <slrnbvcm32.122.philh@cabalamat.cabalamat.org>
	<JZqdnSmWjK7nd2uiRVn-hg@comcast.com>
	<slrnbvf8jf.62c.philh@cabalamat.cabalamat.org>
Message-ID: <f72dnTXs__O772Wi4p2dnA@comcast.com>

phil hunt wrote:
> On Sat, 03 Jan 2004 11:05:54 -0500, Jeff Schwab <jeffplus at comcast.net> wrote:
> 
>>phil hunt wrote:
>>
>>>Does anyone know of a text-to-HTML processing program, ideally
>>>written in Python because I'll probably be wanting to make small
>>>modifications to it, which is simple and straightforward to use
>>>and which uses a simple markup language (something like Wikipedia
>>>markup would be ideal)?
>>
>>How about troff?  Or if you really want to keep it simple, why not use 
>>the <pre> tag in HTML?
> 
> 
> I wasn't aware troff did HTML output.

There are separate utilities to do the translation.  I have 
groff/grohtml on my linux machine; I think there's something different 
on my Solaris box.

>>Or if you really want to keep it simple, why not use
>>the <pre> tag in HTML? 
> 
> 
> Yuk. 

Simple.

Of course, one *could* just use HTML, and stop whining. :)



From goodger at python.org  Wed Jan 28 09:45:20 2004
From: goodger at python.org (David Goodger)
Date: Wed, 28 Jan 2004 09:45:20 -0500
Subject: r prefix bug ... or my lack of understanding?
In-Reply-To: <bv8gtj$5ob$1@ngspool-d02.news.aol.com>
References: <bv8gtj$5ob$1@ngspool-d02.news.aol.com>
Message-ID: <4017CB00.90807@python.org>

It's a FAQ:
http://www.python.org/doc/faq/general.html#why-can-t-raw-strings-r-strings-end-with-a-backslash
(or question 4.24 of http://www.python.org/doc/faq/general.html).

-- David Goodger




From scottdog at nospam.com  Tue Jan 20 15:32:21 2004
From: scottdog at nospam.com (Dog@will.hunt)
Date: Tue, 20 Jan 2004 12:32:21 -0800
Subject: Installing SpamBayes
Message-ID: <400c399b_2@newsfeed.slurp.net>

I am brand new to the whole Python thing and am trying to install SpamBayes
so that I can use the proxy server to filter spam at my office.  I am having
trouble following the instructions provided.  It says to run the setup.py
file using the following command in IDLE in the directory that I extracted
the spambayes files into: python setup.py install.

When I do this, it tells me that python is not a recognized command.

PLEASE HELP!!

Signed,

Frustrated.




From robin at jessikat.fsnet.co.uk  Mon Jan 12 17:42:12 2004
From: robin at jessikat.fsnet.co.uk (Robin Becker)
Date: Mon, 12 Jan 2004 22:42:12 +0000
Subject: Python is far from a top performer according to benchmark
	test...
References: <ryELb.238$tK2.228@amstwist00> <btn5db$2f8$1@absinth.dialog.net.pl>
	<pan.2004.01.09.21.35.40.132608@yahoo.com>
	<6ee58e07.0401092129.302cb9d4@posting.google.com>
	<pan.2004.01.11.06.08.18.867825@yahoo.com>
	<6ee58e07.0401120542.5d79090d@posting.google.com>
Message-ID: <ZGsHWLAELyAAFw4h@jessikat.fsnet.co.uk>

In article <6ee58e07.0401120542.5d79090d at posting.google.com>, Lothar
Scholz <llothar at web.de> writes
....
>
>Fortran does not have this problem so a lot of optimizations can be
>done and values can be hold in registers for a much longer time,
>resulting in much greater speed.
>

I'm not sure I agree with the above. Aliases could certainly occur in
fortran 77, I haven't used 90 so can't say for sure.
>Remember that on supercomputers a 25% spped enhancement (which a good
>fortran compiler is faster then C) can mean a few million dollars of
>saved hardware costs. The coding time is not importing compared to the
>running time. So real hard numerics are always done in Fortran.

-- 
Robin Becker


From bhv1 at psu.edu  Thu Jan 22 16:12:42 2004
From: bhv1 at psu.edu (Brian Victor)
Date: Thu, 22 Jan 2004 15:12:42 -0600
Subject: Program Python in VIM
References: <871xpsc5zf.fsf@tulip.whu.ca>
	<mailman.657.1074790793.12720.python-list@python.org>
Message-ID: <slrnc10f2i.sg0.bhv1@pa-steclge-u3-c3b-133.stcgpa.adelphia.net>

Fran?ois Pinard wrote:
> I do not know if there is a better way, but what I do for one is to
> create a small Makefile like:
>
> try:
> 	python test.py

I use a similar Makefile, and then I bind F4 to "make" in my .vimrc:

map ^[[14~ :make^M

To make that work, you have to make liberal use of control-V.  Type:

map <ctrl-V><F4> :make<ctrl-V><enter>

into your .vimrc, and F4 should be bound to the make command.
One-keystoke running!  (Does that violate an amazon patent?...)

-- 
Brian


From andreas.lobinger at netsurf.de  Mon Jan 19 11:02:03 2004
From: andreas.lobinger at netsurf.de (Andreas Lobinger)
Date: Mon, 19 Jan 2004 17:02:03 +0100
Subject: Fw: PDF library for reading PDF files
References: <mailman.464.1074430854.12720.python-list@python.org>
Message-ID: <400BFF7B.95F21050@netsurf.de>

Aloha,

> Peter Galfi schrieb:
> I am looking for a library in Python that would read PDF files and I
> could extract information from the PDF with it. I have searched with
> google, but only found libraries that can be used to write PDF files.
> Any ideas?

Use file, split, zlib and a broad knowledge of the PDF-spec...

Accessing certain objects in the .pdf is not that complicated if
you f.e. try to read the /Info dictionary. Getting text from
actual page content could be very complicated.

Can you explain your 'information' further?

Wishing a happy day
		LOBI


From theaney at cablespeed.com  Mon Jan  5 20:08:06 2004
From: theaney at cablespeed.com (Tim Heaney)
Date: Mon, 05 Jan 2004 20:08:06 -0500
Subject: Quck question
References: <3125790e.0401051610.5e24de28@posting.google.com>
Message-ID: <87ad51yjd5.fsf@mrbun.watterson>

sinzcere at hotmail.com (J) writes:

> I have the following information in a file :
> r1kcch    Serial0/0/0    propPointToPointSerial
> Mon Jan 5 13:15:03 PST 2004 InOctets.1    0
> Mon Jan 5 13:15:05 PST 2004 OutOctets.1   0
>
> I want to be able to extract each line into a comma delimited list. 
> Bellow i am trying to print out my list print currentList but nothing
> is comming out.  I added a line after print test to make sure the file
> has the information.  Can someone help me with this?

I'm not certain I understand what you're doing, but perhaps you want
something like this?

  file = open("test.txt")
  for line in file:
      list = line.split()
      if len(list):
          print ','.join(list)

I hope this helps,

Tim


From Kuser-admin at kde.gr.jp  Wed Jan 28 00:04:38 2004
From: Kuser-admin at kde.gr.jp (Kuser-admin at kde.gr.jp)
Date: Wed, 28 Jan 2004 14:04:38 +0900
Subject: Fml status report (Kuser ML)
References: <20040128050434.41E251F801C@mail.kde.gr.jp>
Message-ID: <200401281404.FMLAAB19806.Kuser@kde.gr.jp>

ATTENTION! Your mail is too big, so not processed!!!
This ML <Kuser at kde.gr.jp> restricts the maximum mail size,
so pay attention to the mail with e.g. attachments.

--Kuser at kde.gr.jp, Be Seeing You!    

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

       Help: <mailto:Kuser-ctl at kde.gr.jp?body=help>
Unsubscribe: <mailto:Kuser-ctl at kde.gr.jp?body=unsubscribe>

If you have any questions or problems,
   please contact Kuser-admin at kde.gr.jp
       or 
   send e-mail with the body "help"(without quotes) to
      Kuser-ctl at kde.gr.jp
      (here is the automatic reply, so more preferable)

e.g. on a Unix Machine
(shell prompt)% echo "help" |Mail Kuser-ctl at kde.gr.jp

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




From jzgoda at gazeta.usun.pl  Sat Jan 31 03:09:08 2004
From: jzgoda at gazeta.usun.pl (Jarek Zgoda)
Date: Sat, 31 Jan 2004 08:09:08 +0000 (UTC)
Subject: How to start a DTS Package on MS-SQL-Server?
References: <mailman.1050.1075484359.12720.python-list@python.org>
	<bvevhh$akj$06$1@news.t-online.com>
Message-ID: <bvfnr4$2lr$1@nemesis.news.tpi.pl>

Dirk <usenet at mail-2-me.com> pisze:

> Sorry, I think I forgot to write that I want to start this from a remote 
> computer. So I can't simply use popen. But I know about this dtsrun 
> executable (that's how the sql-server does it itself...).

This can be painful... Try to schedule your package and look at
"Operating system comand" field in scheduled job properties. You will
get the idea on how packages are run by dtsrun.exe.

The other idea worth exploring is "MS OLE DB Provider for DTS Packages"
-- loosely documented component of any contemporary (>2.5) MDAC package.
When I needed to run packages from my program, I had no time to dig in
MSDN, so I cann't say anything more.

-- 
Jarek Zgoda
Unregistered Linux User #-1
http://www.zgoda.biz/ JID:zgoda-a-chrome.pl http://zgoda.jogger.pl/


From ods at strana.ru  Thu Jan 29 11:16:44 2004
From: ods at strana.ru (Denis S. Otkidach)
Date: Thu, 29 Jan 2004 19:16:44 +0300 (MSK)
Subject: regexp upward compatibility bug ?
In-Reply-To: <bvb7bb$2hr8$1@biggoron.nerim.net>
Message-ID: <Pine.LNX.4.44L.0401291913370.24169-100000@ods.pravda.rfn.ru>

On Thu, 29 Jan 2004, Gilles Lenfant wrote:

GL>    File "txt2html.py", line 27, in txt2html
GL>      pat =
GL> re.compile(r'((ftp|http)://[\w-]+(?:\.[\w-]+)*(?:/[\w-\.?=]*)
GL> *)')
GL>    File "/usr/local/lib/python2.1/sre.py", line 90, in
GL> compile
GL>      return _compile(pattern, flags)
GL>    File "/usr/local/lib/python2.1/sre.py", line 136, in
GL> _compile
GL>      raise error, v # invalid expression
GL> sre_constants.error: bad character range

The problem is in "[\w-\.?=]". "\w" is not a character, so it
cannot be a start of range.  Put "-" at the start or end of
group:

>>> re.compile(r'((ftp|http)://[\w-]+(?:\.[\w-]+)*(?:/[-\w\.?=]*)*)')
<_sre.SRE_Pattern object at 0x40277110>
>>> re.compile(r'((ftp|http)://[\w-]+(?:\.[\w-]+)*(?:/[\w\.?=-]*)*)')
<_sre.SRE_Pattern object at 0x402777a0>


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




From ramen at lackingtalent.com  Sun Jan 18 14:34:07 2004
From: ramen at lackingtalent.com (Dave Benjamin)
Date: Sun, 18 Jan 2004 19:34:07 -0000
Subject: Determining a replacement dictionary from scratch
References: <4b805376.0401181116.3b0adb41@posting.google.com>
Message-ID: <slrnc0loe1.u28.ramen@lackingtalent.com>

In article <4b805376.0401181116.3b0adb41 at posting.google.com>, Dan wrote:
> I'd like to be able to take a formatted string and determine the
> replacement dictionary necessary to do string interpolation with it. 
> For example:
> 
>>>> str = 'his name was %(name)s and i saw him %(years)s ago.'
>>>> createdict( str )
> {'name':'', 'years':''}
>>>>
> 
> Notice how it would automatically fill in default values based on
> type.  I figure since python does this automatically maybe there is a
> clever way to solve the problem.  Otherwise I will just have to parse
> the string myself.  Any clever solutions to this?

Here's a solution that uses a regular expression. It only handles strings
and doesn't cache the regular expression; I'll leave this up to you. =)

import re
def createdict(fmt):
    keys = re.findall('%\(([A-Za-z]+)\)s', fmt)
    return dict(zip(keys, [''] * len(keys)))
        
The regular expression works like this:

 %\(         - match a percent character and opening parenthesis
 ([A-Za-z]+) - match a sequence of one or more alpha characters as a GROUP
 \)s         - match a closing parenthesis and 's' character

For more details on "re", see the documentation:
http://python.org/doc/current/lib/module-re.html

HTH,
Dave

-- 
.:[ dave benjamin (ramenboy) -:- www.ramenfest.com -:- www.3dex.com ]:.
: d r i n k i n g   l i f e   o u t   o f   t h e   c o n t a i n e r :


From mirko-lists at zeibig.net  Thu Jan 15 07:29:31 2004
From: mirko-lists at zeibig.net (Mirko Zeibig)
Date: Thu, 15 Jan 2004 13:29:31 +0100
Subject: Best Python IDE Code Completion!
In-Reply-To: <ba129ce7.0401150352.43e20efa@posting.google.com>
References: <ba129ce7.0401150352.43e20efa@posting.google.com>
Message-ID: <bu613h$drgfs$1@ID-198792.news.uni-berlin.de>

John said the following on 01/15/2004 12:52 PM:
>   Wing IDE seems converse. The editor auto list members is great but
> has no calltips. The interactive window has no completion at all.
I second this, though the editor sometimes need a bit of help ...
and I do not like the MDI approach they have.

>   Python has great introspective capabilities and we have a great open
> contributing community. What technical difficulties keep us from
> having REAL code completion like MS, Borland and several Java IDEs
> (All of which have been funded at one time or the other if not
> entirely - perhaps this is the reason?)

Python is dynamically typed, so no editor in the world can guess the 
type of any function parameters correctly. If you know about the true 
nature of one, you may assist Wing IDE by using isinstance.

class Klass(object):

     def hello(self):
        print "Hello"

def foo(bar):
     assert isinstance(bar, Klass)
     bar.hello()

Without the assert line, it's impossible to detect which type bar has. 
Only during runtime the type of bar is known.

Regards
Mirko
-- 


From tjreedy at udel.edu  Mon Jan 26 17:29:23 2004
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 26 Jan 2004 17:29:23 -0500
Subject: Deleting objects
References: <a33a46fe50e2ab07720a1118aa22d576@news.teranews.com>
Message-ID: <bv44bj$cln$1@sea.gmane.org>


<user at domain.invalid> wrote in message
news:a33a46fe50e2ab07720a1118aa22d576 at news.teranews.com...
> Say I have a database object 'db',
> that contains table objects, that contain field
> objects so that I can do things like this:
>
> print db.table.field.value()
>
>
> Now, after plundering the database for a while,
> the db objects heads a tree of lots of data.
>
> If I want to "reset" the object so that I get
> all of my memory back, can I just do:
>
> del db
>
> or maybe:
>
> for t in db.tables:
> del t
>
> and expect that I have cleaned up all of my
> memory?
>
> After writing this out, I see that the answer
> is clearly yes, but I will post anyway.

Why?

Actually, the issue is not so simple.  'del db' deletes the association
between name db and the database object.  If there is another reference to
the object, that is all that happens.  If not, memory cleanup depends on
the implementation.  CPython will 'free' memory immediately (and
recursively delete tables).  Jython waits for next garbage collection
cycle.  'Free' may just mean available for reuse by Python but not by other
programs.

Db objects often have a close method.  You may get more of what you want by
calling that before del.

Terry J. Reedy






From tdelaney at avaya.com  Tue Jan  6 18:00:53 2004
From: tdelaney at avaya.com (Delaney, Timothy C (Timothy))
Date: Wed, 7 Jan 2004 10:00:53 +1100
Subject: Pre-PEP: Dynamically evaluating default function arguments
Message-ID: <338366A6D2E2CA4C9DAEAE652E12A1DE01063345@au3010avexu1.global.avaya.com>

> From: Daniel Ehrenberg
> 
> One of the most common bugs that people have on the Python Tutor list
> are caused by the fact the default arguments for functions are
> evaluated only once, not when the function is called. The solution to
> this is usually to use the following idiom:

Please do write up this PEP formally and completely, covering every eventuality, and with the history and motivations expressed, so that it can be formally rejected. Then we will have somewhere simple to point to when people bring up this topic again.

Tim Delaney



From jepler at unpythonic.net  Wed Jan 28 16:08:14 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Wed, 28 Jan 2004 15:08:14 -0600
Subject: linking problems with Python C API
In-Reply-To: <bv97mq$bfs$1@sea.gmane.org>
References: <bv97mq$bfs$1@sea.gmane.org>
Message-ID: <20040128210813.GY18498@unpythonic.net>

Refer to the documentation that accompanies your shared library.  The
answer is "some libpython, but python-list can't tell you which one".

Jeff



From __peter__ at web.de  Sat Jan 24 16:55:19 2004
From: __peter__ at web.de (Peter Otten)
Date: Sat, 24 Jan 2004 22:55:19 +0100
Subject: time.time()
References: <buubug$rcj$1@solaris.cc.vt.edu>
	<7cf510d1k3ug79am8s709ebhar2sspjlm2@4ax.com>
	<buunre$ffe$1@solaris.cc.vt.edu>
Message-ID: <buupet$57o$03$1@news.t-online.com>

Bart Nessux wrote:

> Terry Carroll wrote:
> 
>> It sounds like you're thinking time.time() does something else, which
>> you're trying to do.  What is that?  There might be another function for
>> you.
> 
> I should have been more clear... here's the code:

That's not only clearer - that's different :-)

> x = time.time()
> fp = os.popen("some_process", "r")
> fp.read()
> fp.close()
> print (time.time()-x/60)/60
> 
> If fp runs for many hours (in my case it does), I want time.time() to
> return the time it runs in seconds which I would then divide by 60 to
> get the total amount of minutes which I would then divide by 60 to get
> the total amount of hours that the process has ran... does that make
> sense? I don't need to be super precise, just within 1 minute or so of
> the actual amount of time that the process required to run.

>>> start = time()
>>> start
1074980579.623781
>>> sleep(7200)
>>> duration = time() - start 
>>> print "duration in hours:", duration/60/60
duration in hours: 2.0
>>> (time() - start) / 60 / 60
2.0

In the last expression, the parentheses are necessary, because - has lower
precedence than /, i. e. otherwise you would calculate time() -
(start/60/60). Note how I introduced an additional "duration" variable. If
a calculation does not yield the expected result, it is often helpful to
inspect some intermediate values.

Peter

PS: I cheated with my sleep() and time() functions:

>>> def time():
...     global _time
...     try:
...             return _time
...     except NameError:
...             import time
...             _time = time.time()
...     return _time
...
>>> def sleep(s):
...     global _time
...     try:
...             _time += s
...     except NameError:
...             import time
...             _time = time.time() + s



From jcarlson at nospam.uci.edu  Sat Jan 24 16:42:13 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Sat, 24 Jan 2004 13:42:13 -0800
Subject: time.time()
In-Reply-To: <buunre$ffe$1@solaris.cc.vt.edu>
References: <buubug$rcj$1@solaris.cc.vt.edu>
	<7cf510d1k3ug79am8s709ebhar2sspjlm2@4ax.com>
	<buunre$ffe$1@solaris.cc.vt.edu>
Message-ID: <buuovj$4e9$1@news.service.uci.edu>

> x = time.time()
> fp = os.popen("some_process", "r")
> fp.read()
> fp.close()
> print (time.time()-x/60)/60

Parenthesis are your friend:
print (time.time()-x)/3600

  - Josiah


From nospam at nopes  Sat Jan  3 11:35:48 2004
From: nospam at nopes (Steve)
Date: Sun, 04 Jan 2004 03:35:48 +1100
Subject: Pass a variable to another python script
Message-ID: <3ff6ef44$1@clarion.carno.net.au>

Hi,

I've written a small cgi python script that collects feedback from a 
webform. I need to pass the values to another python script.. how do I 
do this? Is this even possible? Thanks

Steve



From usenet_spam at janc.invalid  Tue Jan 20 23:37:51 2004
From: usenet_spam at janc.invalid (JanC)
Date: Wed, 21 Jan 2004 04:37:51 GMT
Subject: Looking for very simple general purpose tokenizer
References: <bug9ij$30k$1@news.tudelft.nl> <buj7on$9bf$1@news.tudelft.nl>
Message-ID: <Xns947739457D2F0JanC@213.119.4.35>

Maarten van Reeuwijk <maarten at remove_this_ws.tn.tudelft.nl> schreef:

> I found a complication with the shlex module. When I execute the 
> following fragment you'll notice that doubles are split. Is there any way 
> to avoid numbers this?

>From the docs at <http://www.python.org/doc/current/lib/shlex-objects.html>

wordchars
    The string of characters that will accumulate into multi-character 
    tokens. By default, includes all ASCII alphanumerics and underscore.

> source = """
>  $NAMRUN
>      Lz      =  0.15
>      nu      =  1.08E-6
> """
> 
> import shlex
> import StringIO
> 
> buf = StringIO.StringIO(source)
> toker = shlex.shlex(buf)
> toker.comments = ""
> toker.whitespace = " \t\r"

toker.wordchars = toker.wordchars + ".-$"   # etc.

> print [tok for tok in toker]


Output:

['\n', '$NAMRUN', '\n', 'Lz', '=', '0.15', '\n', 'nu', '=', '1.08E-6', '\n']

Is this what you want?

-- 
JanC

"Be strict when sending and tolerant when receiving."
RFC 1958 - Architectural Principles of the Internet - section 3.9


From __peter__ at web.de  Fri Jan 30 11:31:06 2004
From: __peter__ at web.de (Peter Otten)
Date: Fri, 30 Jan 2004 17:31:06 +0100
Subject: Simple list question
References: <bvdub7$ksc$1@ucsnew1.ncl.ac.uk>
Message-ID: <bve0sq$al6$05$1@news.t-online.com>

C GIllespie wrote:

> Dear all,
> 
> I have a list something like this: ['1','+','2'], I went to go through and
> change the numbers to floats, e.g. [1,'+',2]. What's the best way of doing

If you really want the [1,'+',2] format, use int() instead of float(). 

> this? The way I done it seems wrong, e.g.
> 
> nod=['1','+','2']
> i=0
> while i<len(nod):
>     if nod[i] !='+' or nod[i] !='-' or nod[i]!='*' or nod[i] != '/' or
> nod[i] != '(' or nod[i] != ')':
>         nod[i] = float(nod[i])
>     i = i + 1
> 
> Comments?

Nothing is wrong with the above, although a  for loop is more common.

for i in range(len(nod)):
  # ...

Instead of testing for all non-floats, you could just try to convert the
list item, keeping it unchanged if an error occurs. Here's a full example
using enumerate() instead of range():

>>> nod = ["1", "+", "2"]
>>> for i, v in enumerate(nod):
...     try:
...             v = float(v)
...     except ValueError:
...             pass
...     else: # yes, try...except has an else (=no exception) branch, too
...             nod[i] = v
...
>>> nod
[1.0, '+', 2.0]

Peter



From mtk at qm.com  Wed Jan 14 13:58:18 2004
From: mtk at qm.com (Totte Karlsson)
Date: Wed, 14 Jan 2004 10:58:18 -0800
Subject: Printing to console (No Scroll)
References: <mailman.365.1074103229.12720.python-list@python.org>
	<bu41k5$4in$00$2@news.t-online.com>
Message-ID: <bu43f8$ibc$1@sea.gmane.org>

Any alternatives to ncurses? It seems like a overkill for this...
cheers
/totte


"Diez B. Roggisch" <deets_noospaam at web.de> wrote in message
news:bu41k5$4in$00$2 at news.t-online.com...
> > How can I print to the console without having it scrolling to a new line
> > for each print statement?
> > I want to print a count down in the console, but for each count it
scrolls
> > the screen (of course).
>
> Use ncurses.
>
> Diez
> -- 
> http://mail.python.org/mailman/listinfo/python-list
>






From twa at post.com  Thu Jan  1 09:24:54 2004
From: twa at post.com (Tom)
Date: Thu, 1 Jan 2004 14:24:54 +0000 (UTC)
Subject: Graph in wxPython - wxpyplot
In-Reply-To: <bt04a4$2e3$1@news.Stanford.EDU>
References: <bt04a4$2e3$1@news.Stanford.EDU>
Message-ID: <bt1ajl$nqe$1@hercules.btinternet.com>

http://www.cyberus.ca/~g_will/wxPython/wxpyplot.html

Is that the sort of thing you mean?

Tom

Oh Kyu Yoon wrote:
> Does anyone know how to implement plots from scipy, chaco, etc
> into wxPython widget?
> 
> Thank you
> 
> 



From ods at strana.ru  Thu Jan 22 09:50:53 2004
From: ods at strana.ru (Denis S. Otkidach)
Date: Thu, 22 Jan 2004 17:50:53 +0300 (MSK)
Subject: utf8 encoding problem
In-Reply-To: <20040122141628.GJ7377@wiggy.net>
Message-ID: <Pine.LNX.4.44L.0401221732340.32058-100000@ods.pravda.rfn.ru>

On Thu, 22 Jan 2004, Wichert Akkerman wrote:

WA> > P.S. According to HTML standard, with
WA> > application/x-www-form-urlencoded content type form data
WA> are
WA> > resricted to ASCII codes:
WA> >
WA> http://www.w3.org/TR/html4/interact/forms.html#form-data-set
WA> >
WA> http://www.w3.org/TR/html4/interact/forms.html#submit-format
WA>
WA> Luckily that is not true, otherwise it would be completely
WA> impossible to

It's true: "The "get" method restricts form data set values to
ASCII characters. Only the "post" method (with
enctype="multipart/form-data") is specified to cover the entire
[ISO10646] character set."

But almost nobody follow this rule.

WA> have websites using non-ascii input. To be specific, the

No, you can use "post" method with multipart/form-data content
type to do that.

WA> encoding used
WA> for HTML forms is determined by:
WA>
WA> 1. accept-charset attribute of the form element if present.
WA> This is
WA>    not handled by all browsers though.

accept-charset attribute can list several encodings.  Which one
to choose?

WA> 2. the encoding used for the html page containing the form

Pages are often re-coded by proxies, so the encoding of submitted
data is not always is one as assumed by form processing script.
The same issue apply for cross-site forms.

WA> 3. ascii otherwise

This is the only reliable encoding :)

WA> this is specified in section 17.3 of the HTML 4.01 standard
WA> you are
WA> referring to.

Sorry, there is no such specification in section 17.3 of the HTML
4.01 standard.  Certainly, your method to determine encoding is
OK for most cases.

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




From peter at engcorp.com  Fri Jan  9 09:18:11 2004
From: peter at engcorp.com (Peter Hansen)
Date: Fri, 09 Jan 2004 09:18:11 -0500
Subject: Looking for a Python interface to TAPI on Win32
References: <2259b0e2.0307180401.5dae02f2@posting.google.com>
	<mailman.1058530829.7072.python-list@python.org>
	<3f17f883$0$49107$e4fe514c@news.xs4all.nl>
	<2259b0e2.0307190529.57338b3f@posting.google.com>
	<NpkSa.16049$7O.14695@nwrdny01.gnilink.net>
	<2259b0e2.0307200604.44d343f4@posting.google.com>
	<fo7rvvoa9bh8m1jg2otndeildpl8gqur7i@4ax.com>
	<btm416$k75$1@news.seed.net.tw>
Message-ID: <3FFEB823.C3FCFDDB@engcorp.com>

"Kent Hsu (Hsu, Chih-Peng)" wrote:
> 
> Try "ctypes" or "calldll" to call the Win32 api directly.

Specifically, ctypes.  I'm pretty sure calldll should be considered obsolete
and it doesn't appear there's an obvious place to find a calldll binary for 
Python 2.3, so it looks unsupported at this point.

-Peter


From skip at pobox.com  Tue Jan  6 11:38:19 2004
From: skip at pobox.com (Skip Montanaro)
Date: Tue, 6 Jan 2004 10:38:19 -0600
Subject: Why does this fail?
In-Reply-To: <878yklavnx.fsf@pobox.com>
References: <vvhdlm72386b3c@corp.supernews.com> <878yklavnx.fsf@pobox.com>
Message-ID: <16378.58491.796532.530331@montanaro.dyndns.org>


    John> Also (advert ;-), if you're doing any kind of web scraping in
    John> Python (including functional testing), you might want to look at
    John> this little FAQ (though it certainly doesn't nearly cover
    John> everything relevant):

    John> http://wwwsearch.sf.net/bits/clientx.html

A possible addition to your "Embedded script is messing up my web-scraping"
section:  Wasn't there mention of the Mozilla project's standalone
JavaScript interpreter (don't remember what it's called) recently alongside
some Python interface?

Skip



From bart_nessux at hotmail.com  Sat Jan 24 18:40:58 2004
From: bart_nessux at hotmail.com (Bart Nessux)
Date: Sat, 24 Jan 2004 18:40:58 -0500
Subject: time.time()
In-Reply-To: <mailman.745.1074979972.12720.python-list@python.org>
References: <buubug$rcj$1@solaris.cc.vt.edu>	<7cf510d1k3ug79am8s709ebhar2sspjlm2@4ax.com>	<buunre$ffe$1@solaris.cc.vt.edu>
	<mailman.745.1074979972.12720.python-list@python.org>
Message-ID: <buuvqb$qdo$1@solaris.cc.vt.edu>

Jeff Epler wrote:
> bart,
> 
> a-b/c evaluates as a-(b/c)
> 
> Jeff
> 

Ah, yes... silly me. That's the problem.



From alan.gauld at btinternet.com  Tue Jan 13 18:13:53 2004
From: alan.gauld at btinternet.com (Alan Gauld)
Date: Tue, 13 Jan 2004 23:13:53 GMT
Subject: Does anyone else not find the fun in programming...?
References: <d232c5e.0401130823.27fd26ff@posting.google.com>
Message-ID: <40047aec.796465196@news.blueyonder.co.uk>

On 13 Jan 2004 08:23:46 -0800, chris.lyon at spritenote.co.uk (Chris
Lyon) wrote:
> I find python very effective as a language and can generally project
> most of my hazy thoughts into it. But FUN !!! This is work dammit,

When I was a working programmer I kind of felt the same way.

But then I became a designer and now cherish the time I spend
writing code (and not just in Python, even C++, Lisp and 
Delphi)- because it is fun! :-)

> programming is fun. Football (association) is fun, walking along
> canals is fun, Arguing about quite how useless the British Government
> is fun but programming  ?

Its fun like doing a jigsaw is fun, or a crossword. Its about
problem solving. Its about finding elegant solutions to problems.
If you don't enjoy doing the puzzle page in your daily newspaper
you probably won't enjoy programming... Probably a bad example
since zillions of crossword haters will now say how much they
enjoy programming! :-)

But its in that ballpark IMHO.

Alan G.
Author of the Learn to Program website
http://www.freenetpages.co.uk/hp/alan.gauld


From fredrik at pythonware.com  Sat Jan  3 10:46:39 2004
From: fredrik at pythonware.com (Fredrik Lundh)
Date: Sat, 3 Jan 2004 16:46:39 +0100
Subject: Can this be reversed (Tkinter)?
References: <002d01c3d171$df2920b0$5501a8c0@markxp>
	<06a901c3d173$0a7e27f0$6401fea9@YODA>
Message-ID: <bt6p29$47m$1@sea.gmane.org>

Dave Brueck wrote:

> > I am looking at the format used by root.geometry().  The string returned
> > from root.geometry() is "%dx%d+%d+%d".  Is there a quick and painless
> > way to extract the values from that string (i.e., "100x150+25+25" =>
> > (100,150,25,25))?
>
> How about:
>
> s = '100x150+25+25'
> import re
> reg = re.compile('(\d+)x(\d+)\+(\d+)\+(\d+)')
> [int(x) for x in reg.match(s).groups()]

note that the offsets may be negative; this pattern should work
a bit better:

    "(\d+)x(\d+)([-+]\d+)([-+]\d+)"

</F>






From simoninusa2001 at yahoo.co.uk  Sat Jan 31 21:35:52 2004
From: simoninusa2001 at yahoo.co.uk (simo)
Date: 31 Jan 2004 18:35:52 -0800
Subject: wxPython documentation
References: <401c25a3$0$11357$636a55ce@news.free.fr>
	<mailman.1084.1075587380.12720.python-list@python.org>
Message-ID: <30260531.0401311835.2246510f@posting.google.com>

Jonathan Daugherty <cygnus at cprogrammer.org> wrote:

> > Where could I find a good documentation about wxPython (a documentation
> > which is not for C++ !!!)

> There are some wxpython tutorials and documents but the official wxPython
> documentation is the wxWindows documenation itself -- wxPython notes are
> sprinkled throughout.

This is what I found off-putting about PyQt - the documentation
basically points you to the Qt C++ docs:

http://www.riverbankcomputing.co.uk/pyqt/docs/PyQt.html

If we've got to figure out the C++ code and convert it to Python, we
may as well just skip Python and write in C++!

The wxPython Wiki is OK, it's a bit brief though, but I've just looked
at wxPython today and figured out how to make a basic Windows
application "shell" in 3 hours or so:

http://wiki.wxpython.org/index.cgi/FrontPage

TKinter has the best documentation, although TKinter is a bit dated
looking, slow and has few widgets:

http://www.pythonware.com/library/tkinter/introduction/index.htm

At least [with a manifest file] py2exe makes an XP-looking program,
that's better than TKinter (not tried the commercial Windows PyQT,
just GPL Linux).


From jjl at pobox.com  Tue Jan 13 12:52:34 2004
From: jjl at pobox.com (John J. Lee)
Date: 13 Jan 2004 17:52:34 +0000
Subject: C++ bad-mouthing (was: Why learn Python ??)
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<7xisjh1e3i.fsf@ruckus.brouhaha.com>
	<10064loqc7sd7e3@corp.supernews.com>
	<7xeku496wx.fsf@ruckus.brouhaha.com>
	<donn-9D2291.16343412012004@nntp6.u.washington.edu>
	<7xhdz08xgy.fsf@ruckus.brouhaha.com>
Message-ID: <877jzvag7x.fsf@pobox.com>

Paul Rubin <http://phr.cx at NOSPAM.invalid> writes:

> Donn Cave <donn at u.washington.edu> writes:
[...re Python...]
> > language.  Full of neat tricks that work like magic, but does it
> > really even attempt to offer anything in the area you're talking about?
> 
> It makes some feeble ones but is somewhat hobbled by its origins as a
> scripting or "glue" language.

Are you referring to *anything* other than the lack of static type
checking and execution speed?


> Also, Python is really still in its
> infancy.  Maybe after PyPy is completed, someone can try writing a
> serious compiler for it, and the issues brought out by writing the
> compiler can drive the design of a successor language, Python II or
> whatever.
[...]

I'm sure you're right that things will advance.  Not sure it would be
best to make a "Python II", though -- Python seems close to a local
maximum.


John


From max at alcyone.com  Fri Jan 23 04:07:14 2004
From: max at alcyone.com (Erik Max Francis)
Date: Fri, 23 Jan 2004 01:07:14 -0800
Subject: I support PEP 326
References: <mailman.654.1074788734.12720.python-list@python.org>	<401081A1.E4C34F00@alcyone.com>	<roy-1E6566.21133122012004@reader2.panix.com>
	<hH2Qb.91181$6y6.1837343@bgtnsc05-news.ops.worldnet.att.net>
	<mailman.675.1074841738.12720.python-list@python.org>
Message-ID: <4010E442.8D13AEF3@alcyone.com>

Paul Prescod wrote:

> Calling min with no arguments need not be the same as calling it with
> an
> empty sequence argument.

Since min(S) and min(*S) behave identically, I submit to you that they
_should_ be.

-- 
 __ Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
/  \ San Jose, CA, USA && 37 20 N 121 53 W && &tSftDotIotE
\__/ The only source of knowledge is experience.
    -- Albert Einstein


From jjl at pobox.com  Mon Jan 19 16:09:45 2004
From: jjl at pobox.com (John J. Lee)
Date: 19 Jan 2004 21:09:45 +0000
Subject: secure unpickle?
References: <mailman.508.1074531936.12720.python-list@python.org>
Message-ID: <87zncjabmu.fsf@pobox.com>

"Tim Peters" <tim.one at comcast.net> writes:

> [Gandalf]
> > ...
> >> I'm using this module (based on the documentation you mentioned):
> >> ...
> 
> [John J. Lee]
> > What does this have to do with the question?  He was worried about
> > security of pickle, not asking how to call dumps() and loads().
> 
> Look at Gandalf's code again.  The pickler is unremarkable, but the
> unpickler contains the assignment:
> 
>     p.find_global = None
> 
> As his loads docstring said, "this function will not unpickle globals and
> instances" as a result.

Aha.

I see from past messages that this is thought to solve the security
problems (for this restricted case), at least by Martin v. Loewis, but
also that Paul Rubin believes a careful audit would be required to
have confidence in it (whether that's FUD, as Martin accuses, or
sensible caution, I have no idea...).

http://www.google.com/groups?threadm=mailman.1012591743.10841.python-list%40python.org


John


From adinospam at logilab.fr  Thu Jan 29 03:34:22 2004
From: adinospam at logilab.fr (Adrien Di Mascio)
Date: Thu, 29 Jan 2004 09:34:22 +0100
Subject: "static" checking
References: <160Sb.19106$fo1.10783@newssvr25.news.prodigy.com>
Message-ID: <pan.2004.01.29.08.34.21.953884@logilab.fr>

Le Thu, 29 Jan 2004 04:37:17 +0000, Moosebumps a ?crit?:

Hi,
> I'm wondering what kind of checking I can do on a python program before
> running it (besides reading over every line).  I hate running a long python
> script, only to have it fail at the end because I misspelled a function
> name, or made some other silly mistake that a compiler would normally catch.
> Then I have to run it all over again to see what happened or come up with
> some sort of short test.

Have a look at pylint (http://www.logilab.org/projects/pylint)

Cheers,

-- 
Adrien Di Mascio
LOGILAB, Paris (France).
http://www.logilab.com   http://www.logilab.fr   http://www.logilab.org




From nospam at here.com  Tue Jan 13 15:13:04 2004
From: nospam at here.com (Richard Townsend)
Date: Tue, 13 Jan 2004 20:13:04 -0000
Subject: tkinter canvas postscript fontmap
References: <PPVMb.30707$6N3.28252@charlie.risq.qc.ca>
Message-ID: <1074024577.27787.0@damia.uk.clara.net>

> I want to set the fontmap to be used when saving the file. I write to
> the canvas using Arial and would like to get either Arial or Courier in
> the resulting .ps instead of MsSansSerif... I haven't found any sample
> on the net. Has anyone done this before with success ? What is the
> format of the "fontmap" option ?
>

I needed to do something similar some time ago and also found no examples.

I'm not sure if it is the correct way to do it, but the code below appears
to work.

When you press the 'Print' button it creates a fontmap array which
substitutes 'Arial 12' for all occurences of 'Courier 12' and 'Arial-Bold
14' for 'Courier 14'. It then dumps the postscript to a file.

Hope that helps,
Richard Townsend

----------------------------------------------------------------------------
------------------------------------
from Tkinter import *

font1 = "Courier 12"
font2 = "Courier 14"

class Demo:

    def __init__(self):
        self.root = Tk()

        self.canvas = Canvas(self.root, height=300, width=300, bg="white")
        self.canvas.pack()

        frame = Frame(self.root)
        frame.pack()

        print_pb = Button(frame, text="Print", command=self.genPostscript)
        print_pb.pack(side=LEFT)

        quit_pb = Button(frame, text="Quit", command=self.quit)
        quit_pb.pack(side=LEFT)

        text = 'This is in %s' % font1
        self.canvas.create_text(10, 10, text=text, anchor=NW, font=font1)

        text = 'This is in %s' % font2
        self.canvas.create_text(10, 40, text=text, anchor=NW, font=font2)

        self.canvas.update_idletasks()
        self.root.mainloop()


    def genPostscript(self):
        # Create fontmap array
        self.root.tk.call('set', 'fontmap(%s)' % font1, 'Arial 12')
        self.root.tk.call('set', 'fontmap(%s)' % font2, 'Arial-Bold 14')

        #res = self.root.tk.call('array', 'get', 'fontmap')
        #print res

        # Generate the postscript data using the fontmap
        postscript = self.canvas.postscript(fontmap='fontmap')

        filename = 'dump.ps'
        fd = open(filename, 'w')
        fd.write(postscript)
        fd.close()


    def quit(self):
        self.root.quit()


if __name__ == "__main__":

    Demo()




From borkxorfoo at hotmail.com  Tue Jan 27 21:05:13 2004
From: borkxorfoo at hotmail.com (bor)
Date: Tue, 27 Jan 2004 18:05:13 -0800
Subject: makeExe.py
References: <20040127134802.27165.qmail@web8302.mail.in.yahoo.com>
Message-ID: <LAW15-DAV12gyoPB2EW0002573c@hotmail.com>

I use this:

http://sourceforge.net/project/showfiles.php?group_id=91562&package_id=96755
&release_id=188884

sits on top of py2exe and is very handy for click/compile when needed.

----- Original Message -----
From: "Premshree Pillai" <premshree_python at yahoo.co.in>
To: <peter at engcorp.com>; <python-list at python.org>
Sent: Tuesday, January 27, 2004 5:48 AM
Subject: Re: makeExe.py


> > if you're interested
> > in integrating the
> > changes, and maintaining it, I'll forward our own
> > script which you can
> > pull apart and reuse as required...
>
> I'd be interested in that.
>
>
>  --- Peter Hansen <peter at engcorp.com> wrote: >
> Premshree Pillai wrote:
> > >
> > > Wrote a simple Python script that makes life a wee
> > bit
> > > easier when using py2exe:
> > >
> > > """
> > > makeExe.py
> > > - Simple Python script to automate the creation
> > >   of Python executables using py2exe.
> > >
> > [snip]
> > > fp = open("setup.py","w")
> > > temp = """from distutils.core import setup
> > > import py2exe
> > > setup(name = "%s",
> > >      scripts = ["%s"],
> > > )""" % (package,fileName)
> > > fp.write(temp)
> > > fp.close()
> >
> > You could save yourself a fair bit of trouble, and
> > avoid writing a
> > "setup.py" file to the filesystem (possibly
> > overwriting an existing
> > one which might be important) by just calling the
> > setup() method
> > directly yourself.  The only trick is that it checks
> > sys.argv[] for
> > the "py2exe" argument, so you have to fake that
> > first:
> >
> > sys.argv[1:] = ['py2exe']
> >
> > from distutils.core import setup
> > setup(name=package,
> >     scripts=[fileName])
> >
> > That should do the trick....  if you're interested
> > in integrating the
> > changes, and maintaining it, I'll forward our own
> > script which you can
> > pull apart and reuse as required...
> >
> > -Peter
> > --
> > http://mail.python.org/mailman/listinfo/python-list
>
> =====
> -Premshree
> [http://www.qiksearch.com/]
>
> ________________________________________________________________________
> Yahoo! India Mobile: Download the latest polyphonic ringtones.
> Go to http://in.mobile.yahoo.com
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>


---
As of 2nd December 2003, Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.481 / Virus Database: 277 - Release Date: 5/13/2003



From exarkun at intarweb.us  Tue Jan  6 22:24:16 2004
From: exarkun at intarweb.us (Jp Calderone)
Date: Tue, 6 Jan 2004 22:24:16 -0500
Subject: Iterating over a binary file
In-Reply-To: <btf5j8$6g26f$1@ID-46268.news.uni-berlin.de>
References: <btf5j8$6g26f$1@ID-46268.news.uni-berlin.de>
Message-ID: <20040107032416.GB10140@intarweb.us>

On Tue, Jan 06, 2004 at 03:25:11PM -0500, Derek wrote:
> Pardon the newbie question, but how can I iterate over blocks of data
> from a binary file (i.e., I can't just iterate over lines, because
> there may be no end-of-line delimiters at all).  Essentially I want to
> to this:
> 
> f = file(filename, 'rb')
> data = f.read(1024)
> while len(data) > 0:
>     someobj.update(data)
>     data = f.read(1024)
> f.close()
> 
> The above code works, but I don't like making two read() calls.  Any
> way to avoid it, or a more elegant syntax?  Thanks.
> 

      f = file(filename, 'rb')                                                                                                                                          
      for data in iter(lambda: f.read(1024), ''):                                                                                                                       
        someobj.update(data)                                                                                                                                            
      f.close()                                                                                                                                                         
                                                                                                                                                                        
  Jp                                                                                                                                                                    



From derekledbetter at mindspring.com  Sun Jan  4 06:02:41 2004
From: derekledbetter at mindspring.com (Derek Ledbetter)
Date: Sun, 04 Jan 2004 11:02:41 GMT
Subject: Integer math question
References: <3987e01c.0401030832.114c6f2a@posting.google.com>
Message-ID: <0001HW.BC1D32D80155EE2AF0284600@netnews.comcast.net>

On Sat, 3 Jan 2004 8:32:07 -0800, Frank wrote
(in message <3987e01c.0401030832.114c6f2a at posting.google.com>):

> In C++
> 
> i = 5 / 10 	and
> i = -5 / 10 	both have the same result 0.

Actually this is implementation defined in C89 and standard C++.  Either
-5/10 == 0 and -5%10 == -5, as in your implementation, or -5/10 == -1
and -5%10 == 5, like Python.  In C99, and possibly a future version of
C++, it's always done the first way (rounding towards zero).

-- 
Derek Ledbetter
derekl at serve.com

Heavy boots of lead 
fills his victims full of dread 
Running as fast as they can 
Iron Man lives again! 




From elainejackson7355 at home.com  Fri Jan 30 03:19:59 2004
From: elainejackson7355 at home.com (Elaine Jackson)
Date: Fri, 30 Jan 2004 08:19:59 GMT
Subject: newbie py2exe difficulty
Message-ID: <PsoSb.329649$JQ1.232982@pd7tw1no>

Hi. I'm trying to use py2exe (http://starship.python.net/crew/theller/py2exe/)
in Windows 98. I copied the necessary files into my Python23 directory (where I
have a module called 'mastermind.py'), and in the same directory I saved a
Python source file called 'setup.py' containing the following text:

from distutils.core import setup
import py2exe
setup(console=["mastermind.py"])

At this point the instructions say the following:

"""
Running

python setup.py py2exe --help

will display all available command-line flags to the py2exe command.

Now you can call the setup script like in this way:

python setup.py py2exe

and a subdirectory dist will be created, containing the files myscript.exe,
python23.dll, and library.zip.
"""

My problem is that, when I attempt to follow the first instruction (details
follow), it opens a DOS window that may indeed display all available
command-line flags to the py2exe command, but isn't very helpful because it
immediately disappears. (In fact I'm really not sure what a command-line flag
is, or what I'm supposed to do with it.) I've also tried simply running
setup.py: the DOS window disappeared immediately and there was no 'dist'
directory in evidence.

Here is what I tried regarding the first instruction:

i) Creating a shortcut to setup.py, setting its 'target' property to
'C:\Python23\setup.py --help', and double-clicking on its icon.

i) Setup | Run... | C:\Python23\python.exe setup.py py2exe --help | OK

Any help with this problem will be very much appreciated. Knowing how to create
standalone executables would give me lots of incentive to keep learning more
Python (which, incidentally, rocks).

Peace




From dave at pythonapocrypha.com  Sat Jan 24 00:19:56 2004
From: dave at pythonapocrypha.com (Dave Brueck)
Date: Fri, 23 Jan 2004 22:19:56 -0700
Subject: Batch commands on Windows
References: <7A3Qb.4870$AK2.3953@newssvr29.news.prodigy.com><mailman.689.1074867434.12720.python-list@python.org>
	<grmQb.15157$yd7.13778@newssvr27.news.prodigy.com>
Message-ID: <03fb01c3e239$b4a1ed30$6401fea9@YODA>

Moosebumps wrote:
[snip]
> # this actually does the same thing as Python, I was mistaken.  I was
> mislead by the IDLE behavior.
[snip]

> The general idea is that it would be nice if there weren't any differences
> between the batch file and python.  From a practical standpoint, it would
> encourage a lot of people to switch from nasty batch files to Python scripts
> if you could just surround the entire thing with os.batch(' ') or some
> similar sort of mechanical textual substitution.  Then you could clean it up
> gradually.

Ah, now I understand what you meant. In practical terms, there isn't much of a
difference between executing Python commands in batch mode or interactively
from the *Python* command prompt (the interactive interpreter), and I think
that's what this all boils down to. A DOS window is an interactive command
prompt for the MS-DOS batch language; Python is a different language and has
its own command prompt, so it wouldn't really make sense for commands in one
language to be valid in the other. It's easy to miss this point though since
its common to access the Python "command prompt" by first launching the DOS
command prompt, but they really are two different languages with two different
purposes.

> > > What's the deal with that?  I thought Python started out as a scripting
> > > language.  And that seems like the most basic thing that a scripting
> > > language should do.
> >
> > Dunno, although MS-DOS shell scripting is certainly a small subset of
> scripting
> > in general. Maybe with a concrete example somebody will be able to give
> you a
> > hand.
>
> It is a small subset, but an important subset.  Shell scripting started
> probably when people got sick of typing the same commands into the prompt.
> For a language to really support shell scripting, it should provide a way of
> automating the process of typing in the commands.  As in, there should be no
> difference whether you're actually typing, or you're running the script.

Right, and there is little difference between batch and interactive modes of
Python, and little difference between batch and interactive modes of MS-DOS,
but what you're wishing for is for batch mode of language A to be the same as
interactive mode of language B. Unless one language is a subset of the other,
that just doesn't make sense (and I'm very pleased that Python is not a
superset of DOS batch files! :) )

> If there is a way and I don't know about it, I would be happy to hear about
> it.  But I do think it is a pretty big hole.

I don't - Python is a general purpose programming language that happens to be
pretty good for so-called "shell scripting" too, but the language is useful in
so many other domains that it wouldn't make sense to tailor it too heavily to
this particular type of problem. Further, if it were to be tailored to make
shell scripting even easier, I really doubt that basing it on the MS-DOS batch
language would be a good idea - even something as quirky as bash would be far
better.

-Dave




From swalters_usenet at yahoo.com  Thu Jan  8 19:00:12 2004
From: swalters_usenet at yahoo.com (Samuel Walters)
Date: Fri, 09 Jan 2004 00:00:12 GMT
Subject: What psyco is goot at [Was: Rookie Speaks]
References: <3FFC9855.3070901@lawson.com>
	<pan.2004.01.07.23.38.51.236836@yahoo.com>
	<3FFC9A22.3020507@lawson.com>
	<pan.2004.01.08.00.03.13.66828@yahoo.com>
	<tyfsmiqg1qi.fsf_-_@pcepsft001.cern.ch>
	<pan.2004.01.08.18.24.09.555980@yahoo.com>
	<mailman.195.1073599475.12720.python-list@python.org>
Message-ID: <pan.2004.01.08.23.58.55.101552@yahoo.com>

|Thus Spake Tim Churches On the now historical date of Fri, 09 Jan 2004
09:10:58 +1100|

> Does that mean that Armin Rigo has slipped some form of Einsteinian,
> relativistic compiler into Psyco?

No, no.  It means one of two things:  either you didn't adjust constant
that tries to factor out the overhead of profiling, or the call took so
long that the timer actually overflowed.

This will help you set the proper constant:

-----
import profile
import pprint

tests = 20
cycles = 10000
pr = profile.Profile()
proflist = []
for x in xrange(1, tests + 1):
    proflist.append(pr.calibrate(cycles))

pprint.pprint(proflist)
-----

Increase cycles until your results don't exhibit much of a spread, then
take the lowest of those values.  This is the constant you set when
instantiating a profiling object.  It is specific to each individual
machine.

If it *still* gives you negative times, then the timer is overflowing and
you need to adjust the original script so that you're not running through
such a big list of numbers.

Then your apparent problems with causality should be solved.

Sam Walters.

-- 
Never forget the halloween documents.
http://www.opensource.org/halloween/
""" Where will Microsoft try to drag you today?
    Do you really want to go there?"""



From jepler at unpythonic.net  Sun Jan 18 13:13:31 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Sun, 18 Jan 2004 12:13:31 -0600
Subject: re question - finiding matching ()
In-Reply-To: <1074445520.18656.30.camel@dev.internal>
References: <4f0a9fdb.0401180751.4b66d974@posting.google.com>
	<1074445520.18656.30.camel@dev.internal>
Message-ID: <20040118181331.GB24401@unpythonic.net>

Perhaps you'd like to enhance your test-suite:
	# Do improperly-nested parens cause an exception? (part 1)
        text = 'add((1,2,3)'
        self.assertRaises(RuntimeError, findOperands, 'add', text)

	# Do improperly-nested parens cause an exception? (part 2)
        text = 'add(1,2,3))'
        self.assertRaises(RuntimeError, findOperands, 'add', text)

	# Do multiple statements on one line behave as expected?
        text = 'add(1,2); add(1,2)'
        expected = ['2', '3']
        self.assertEquals(operands, expected)

Jeff



From sidharthk at hotmail.com  Thu Jan 29 11:43:19 2004
From: sidharthk at hotmail.com (Sidharth Kuruvila)
Date: Thu, 29 Jan 2004 22:13:19 +0530
Subject: Get number of iteration
References: <bvbbd7$9rv$01$1@news.t-online.com>
	<bvbbmf$q1bkm$1@ID-111250.news.uni-berlin.de>
Message-ID: <bvbdg2$q8o0d$2@ID-223265.news.uni-berlin.de>

there is a function in python 2.3 called enumerate.


>>> l = range(0,51,5)
>>> e = enumerate(range(0,51,5))
>>> e
<enumerate object at 0x0119BBC0>
>>> list(e)
[(0, 0), (1, 5), (2, 10), (3, 15), (4, 20), (5, 25), (6, 30), (7, 35), (8,
40), (9, 45), (10, 50)]
>>> e = enumerate(range(0,51,5))
>>> for index, value in e:
...  print "The index of value %i is %i" % (value, index)
...
The index of value 0 is 0
The index of value 5 is 1
The index of value 10 is 2
.
.
.

if you are using an older version of python which doesn't have enumerate
you could do this
>>> l = range(0,51,5)
>>> zip(range(len(l)), l)
[(0, 0), (1, 5), (2, 10), (3, 15), (4, 20), (5, 25), (6, 30), (7, 35), (8,
40), (9, 45), (10, 50)]







From sebb at linuxcult.com  Sun Jan 11 18:19:37 2004
From: sebb at linuxcult.com (sebb)
Date: 11 Jan 2004 15:19:37 -0800
Subject: Search and replace a specific word in a file object.
Message-ID: <56f42e53.0401111519.2da31b8a@posting.google.com>

I want to know how to search for a word in a file object and then
replace that word with another string. I would like to know the
easiest way to do it.

Thanks.


From Scott.Daniels at Acm.Org  Sun Jan 18 18:25:40 2004
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Sun, 18 Jan 2004 15:25:40 -0800
Subject: Printing variable names
In-Reply-To: <mailman.479.1074455535.12720.python-list@python.org>
References: <a6d1df44.0401181122.56f1f091@posting.google.com>
	<mailman.479.1074455535.12720.python-list@python.org>
Message-ID: <400b207a$1@nntp0.pdx.net>

Mark McEahern wrote:
> Mike wrote:
>> mylist = [a, b, c]
>>
>> I want to print out the names of the variables in mylist (not the
>> values of a, b, and c).  How do I go about doing this.  Thanks.
>> Mike
> ... One idea is to use a dictionary instead.  Then:
> for key, value in mydict.iteritems():
>    print '%(key)s = %(value)s' % locals()
> I'm curious what problem you're trying to solve.

Mark's questions are very much on target.  If the purpose is debugging,
you might be satisfied with something like:

     def vnames(value, *dicts):
         """From a value and some dictionaries and give names for the 
value"""
         result = []
         for d in dicts:
             result.extend([key for key, val in d.iteritems()
                            if val is value])
         result.append(repr(value))
	return result

Which you might use like:

     a,b,c = 1,2,3
     d,e,f = 5,4,3

     for v in range(10):
         print v, vnames(v, locals(), globals())

Note: You probably need only locals or globals if you are at the top
       level of an interpreter such as Idle or the python shell.
        You might prefer '==' to 'is', but remember that 0.0 == 0 == 0L.

-Scott David Daniels
Scott.Daniels at Acm.Org


From astoltz at yahoo.com  Thu Jan 22 13:04:39 2004
From: astoltz at yahoo.com (Al Stoltz)
Date: 22 Jan 2004 10:04:39 -0800
Subject: cgi.fieldstorage not getting POST data
Message-ID: <606892f8.0401221004.68aac4e2@posting.google.com>

Greetings all.  

I've got a small web application (just a web interface to a MS-access
database) and I recently upgraded ActiveState's python dist. from 2.2
to their latest (2.3.2 I think). In the process, I broke some of my
cgi scripts.  A little troubleshooting reveals that the
cgi.fieldstorage() method is not receiving any data at all when using
an HTTP POST request in my HTML.  If I change to a GET request, all is
well.

I'll add that the scripts were working fine with the POST request
under version 2.2.  A quick glance through the change log at both
ActiveState and Python.org didn't yield any clues that the cgi module
might have changed from 2.2 to 2.3

OS is windows2000 and I'm using ActiveState's version because I need
the ODBC module that it comes with it.

Code snippets are below.  If I change method="post" to method="get",
the value of id get passed into test1.py like you would expect.
Otherwise the value that form.getvalue('id') returns is 'none'.

Anyone have any insight?  Thanks for looking.

--------------- HTML Page---------------
<body>
<p>This is a test.</p>
<form action="http://my_server.com/cgi-bin/test1.py" method="post">
<input type="text" name="id" value="" size='16' />
<input type="submit" value="Test" />
</form>

</body>

--------------- test1.py -----------------------------

#!d:/python/python.exe

import cgi
import cgitb
cgitb.enable()

form = cgi.FieldStorage()
id = form.getvalue('id')

print "Content-Type: text/html"
print
print"<html><body>"
print "<p>value of id is: %s</p>" % id
print "</body></html>"


From jcarlson at uci.edu  Thu Jan 22 11:43:33 2004
From: jcarlson at uci.edu (Josiah Carlson)
Date: Thu, 22 Jan 2004 08:43:33 -0800
Subject: Checking for duplicate instances of a script...
References: <400e4638$0$19274$626a54ce@news.free.fr>
	<8b146afd37580ecc733f713e953b542c@news.teranews.com>
Message-ID: <20040122084154.0261.JCARLSON@uci.edu>

> >Hello, python beginner here,
> >How can I make sure that a given script is never run more than once at the
> >same time in a system ?
> >Besides checking 'ps' for its own name. Most modern langages have a direct
> >way to do that.
> >Thanks
> What modern language has a direct way to do that?

You can register a COM or CORBA interface (is this what they are called?)
and attempt to connect to it during startup.  If you can connect to
yourself, don't start up, if you can't, start up.

 - Josiah



From seanl at chaosring.org  Mon Jan  5 20:06:05 2004
From: seanl at chaosring.org (Sean R. Lynch)
Date: Mon, 05 Jan 2004 17:06:05 -0800
Subject: Scoped Lock
In-Reply-To: <m37k06720b.fsf@pc150.maths.bris.ac.uk>
References: <bt9ovs$p92$1@graf.cs.uni-magdeburg.de>
	<3ff8a259$0$121$e4fe514c@dreader10.news.xs4all.nl>
	<m37k06720b.fsf@pc150.maths.bris.ac.uk>
Message-ID: <DLydnb9wQ6sblGeiRVn-vA@speakeasy.net>

How about:

def lock_call(mutex, func, *args, **kwargs):
     mutex.acquire()
     try:
         res = func(*args, **kwargs)
     finally:
         mutex.release()

     return res

def do_something(blah):
     # do stuff

m = threading.Lock
lock_call(m, do_something, "some data")


From jeff at corrt.com  Thu Jan  1 23:20:19 2004
From: jeff at corrt.com (Jeff Kunce)
Date: Thu, 1 Jan 2004 22:20:19 -0600
Subject: [Image-SIG] PIL: jpeg comment
In-Reply-To: <20031223221724.GA2701@nl.linux.org>
Message-ID: <000601c3d0e7$c4aab350$b9c3930a@jjkc100>

I don't know for sure, but try looking in the "app" attribute (a
dictionary) of an image object. For example:
  im = Image.open('myimage.jpg')
  print im.app
EXIF data is stored there, so maybe comments are, too

  --Jeff

> -----Original Message-----
> From: image-sig-bounces at python.org
[mailto:image-sig-bounces at python.org]
> On Behalf Of Gerrit Holl
> Sent: Tuesday, December 23, 2003 4:17 PM
> To: image-sig at python.org
> Cc: python-list at python.org
> Subject: [Image-SIG] PIL: jpeg comment
> 
> Hi,
> 
> how do I read a JPEG comment with the Python Imaging Library?
> 
> yours,
> Gerrit Holl.
> 
> --
> Asperger's Syndrome - a personal approach:
> 	http://people.nl.linux.org/~gerrit/english/
> 
> _______________________________________________
> Image-SIG maillist  -  Image-SIG at python.org
> http://mail.python.org/mailman/listinfo/image-sig






From ville.vainio at spamster_tut_remove.fi  Sun Jan 11 05:43:59 2004
From: ville.vainio at spamster_tut_remove.fi (Ville Vainio)
Date: 11 Jan 2004 12:43:59 +0200
Subject: The indentation & the blind (was Re: help with Python Environment
	For Blind User
References: <mailman.277.1073793316.12720.python-list@python.org>
Message-ID: <du7oetaepe8.fsf@lehtori.cc.tut.fi>

>>>>> "eltronic" == eltronic  <eltronic at juno.com> writes:

    eltronic> notepad.exe .  it indents, can put spaces when you hit
    eltronic> tab and handles larger files than notepad.

BTW, how does the indentation block structure work for blind people?
Obviously it would be great if the source-reading program could
pronounce the logical structure as "indent"/"dedent", but that is
probably not the case?

Could people with such needs benefit from an "explicit block
structure" format for the code and a preprocessor, e.g.:

def a(x): (. print a .)

(this would also be needed in whitespace-lossy environments such as
some websites)

Certainly such a preprocessor could be hacked together quickly, but it
might be nice to have the format standardized across the whole
Pythonia, and the preprocessor bundled in Tools/ of the
distributions.

Will I get prize for being the 1000th guy to propose this?

-- 
Ville Vainio   http://www.students.tut.fi/~vainio24


From paul at boddie.net  Mon Jan 26 06:01:12 2004
From: paul at boddie.net (Paul Boddie)
Date: 26 Jan 2004 03:01:12 -0800
Subject: Guardian: open source is a throwback says Jack Schofield
References: <64cff82f.0401251143.328388bd@posting.google.com>
Message-ID: <23891c90.0401260301.14baecb8@posting.google.com>

malcolmny_1 at lycos.com (malcolm) wrote in message news:<64cff82f.0401251143.328388bd at posting.google.com>...
> Why you can't get something for nothing
> Jack Schofield Jan 22 2004

I'd forgotten about Schofield - regarded in various circles as having
been clueless for at least the past decade, and obviously still an
apologist for the 1980s-style proprietary software industry.

> "There are also undoubted benefits from running open source software,
> though the financial ones can be small or even negative. Companies are
> bound to be tempted by the idea of getting something for nothing .."

Interestingly, Schofield then links to a Stallman essay describing the
"free as in freedom" motivations of the FSF. Anyway, when intelligent
companies adopt open source software they work with the community;
when clueless companies download "this free stuff" they work against
the community and ultimately cause more problems for themselves later
on.

> "The facility to fix bugs yourself and to modify programs also sounds
> attractive. However, fixing bugs is not practical for most companies,
> and modifications can be positively dangerous.

Obviously, employees at The Office aren't likely to be rebuilding
their word processor from source, but Schofield seems to think that
there's an army of penguins forcing people at gunpoint to do just
that. Given the reference to Stallman, one would have thought that the
"free as in freedom" slogan would have sunk in and he would have
realised that "freedom" and "compulsion" are quite separate concepts.

> If you are really going to do these things, you need to hire several
> reliable programmers with kernel-level skills"

Or you're a company working in software development who hopefully have
skilled developers working for you anyway.

> "Indeed, the whole progress of commercial computing has been from
> expensive hand-written, bug-ridden, company-specific programs to
> cheaper but more powerful off-the-shelf packages. From that point of
> view, open source is a throwback."

Yes, a history of computing as you'll read in any low-end "computer
studies for business" textbook from circa 1983. But I suppose that
after so long in technology journalism you don't have to learn
anything new or adapt to the reality of the day but instead just stand
on the sidelines cheering for your favourite brand.

> - http://www.guardian.co.uk/online/story/0,3605,1127802,00.html

Some other interesting links:

http://www.sheffieldhallam.org.uk/blog/2004/01/12/19.40.04/
(Responses to Mr Schofield's latest piece which could have been titled
"Free Software - something I don't understand and so it must be bad".)

http://handelaar.org/index.php?p=77&c=1
(A more "robust" critique of Mr Schofield's journalism.)

http://www.computerweekly.com/Article20541.htm
(Pragmatism or just apologist rhetoric?)

Paul


From ykingma at accessforall.nl  Fri Jan 16 14:42:36 2004
From: ykingma at accessforall.nl (Ype Kingma)
Date: Fri, 16 Jan 2004 20:42:36 +0100
Subject: Suggested generator to add to threading module.
References: <7934d084.0401152058.164a240c@posting.google.com>
Message-ID: <40083eac$0$321$e4fe514c@news.xs4all.nl>

Andrae Muys wrote:

> Found myself needing serialised access to a shared generator from
> multiple threads.  Came up with the following
> 
> def serialise(gen):
>   lock = threading.Lock()
>   while 1:
>     lock.acquire()
>     try:
>       next = gen.next()
>     finally:
>       lock.release()
>     yield next

Is there any reason why the lock is not shared among threads?
>From the looks of this, it doesn't synchronize anything
between different threads. Am I missing something?

Kind regards,
Ype

email at xs4all.nl


From no.spam at at.all  Sun Jan 25 04:29:38 2004
From: no.spam at at.all (solo)
Date: Sun, 25 Jan 2004 09:29:38 +0000 (UTC)
Subject: Test
Message-ID: <bv02a1$272s$1@pandora.alkar.net>

 thanks for all&#33; 
---Posted by ME!


From mike at odyne.com  Sun Jan 18 14:22:08 2004
From: mike at odyne.com (Mike)
Date: 18 Jan 2004 11:22:08 -0800
Subject: Printing variable names
Message-ID: <a6d1df44.0401181122.56f1f091@posting.google.com>

mylist = [a, b, c]

I want to print out the names of the variables in mylist (not the
values of a, b, and c).  How do I go about doing this.  Thanks.

Mike


From teeloranTakeThisAway at sunpoint.net  Tue Jan 13 09:54:55 2004
From: teeloranTakeThisAway at sunpoint.net (Teuvo Eloranta)
Date: Tue, 13 Jan 2004 14:54:55 GMT
Subject: newbie list handling question
Message-ID: <400406F9.40D64EE6@sunpoint.net>

Hi,

Any help to this?


## why a changes also when only av should change?

## outcome is:
## av is [[1, 10], [2, 20], [3, 30]]
## a is [[1, 10], [2, 20], [3, 30]]
## av is [[1, 20], [2, 20], [3, 20]]
## a is [[1, 20], [2, 20], [3, 20]]

a = [[1, 10], [2, 20], [3, 30]]
av = []

for i in a:
  av.append(i)
#av = a[:]

print "av is", av
print "a is", a

aver = 20

#for y in av:
#  y[1] = aver

for i in range(len(av)):  # this should change only av, not a?
  av[i][1]=aver

#for i in range(len(a)):  # this solution works!
#  av.append([i+1,aver])

print "av is", av
print "a is", a


Thank's in advance.

-Teuvo



From ir4u4 at yahoo.com  Thu Jan 22 17:57:45 2004
From: ir4u4 at yahoo.com (Equis Uno)
Date: 22 Jan 2004 14:57:45 -0800
Subject: My Python cannot find wxPython
Message-ID: <692feddd.0401221457.18d40480@posting.google.com>

Hi,

I'm trying to run some Python software I downloaded off of sf.net.

It's called Boa.

It uses wxPython.

It appears my install of Python cannot see my install of wxPython.

My question:
How can I tell Python where wxPython lives?

Does Python have a concept like PATH or CLASSPATH?

Some more details about my Python-wxPython problem:

When I run Python on my Linux box I see this:


dhcpclient-220-7:/# python
Python 2.3.3 (#1, Jan  9 2004, 22:14:55) 
[GCC 3.2.2 20030222 (Red Hat Linux 3.2.2-5)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> 

So, I'm running Python 2.3.3.

When I look in /usr/local/share I see wxPython:


dhcpclient-220-7:/# du /usr/local/share/wx/2.4
228	/usr/local/share/wx/2.4/afm
420	/usr/local/share/wx/2.4/gs_afm
652	/usr/local/share/wx/2.4
dhcpclient-220-7:/# 

When I run this "Boa" software I downloaded, I see this:

dhcpclient-220-7:/pt/TThier/Languages/python/boa-constructor-0.2.3# ./Boa.py
Starting Boa Constructor v0.2.3
importing wxPython
Traceback (most recent call last):
File "./Boa.py", line 179, in ?
from wxPython import wx
ImportError: No module named wxPython
dhcpclient-220-7:/pt/TThier/Languages/python/boa-constructor-0.2.3#



How do I get past this error:
ImportError: No module named wxPython

thanks,

-moi


From sidharthk at hotmail.com  Thu Jan 29 11:41:39 2004
From: sidharthk at hotmail.com (Sidharth Kuruvila)
Date: Thu, 29 Jan 2004 22:11:39 +0530
Subject: Get number of iteration
References: <bvbbd7$9rv$01$1@news.t-online.com>
	<bvbbmf$q1bkm$1@ID-111250.news.uni-berlin.de>
Message-ID: <bvbdfv$q8o0d$1@ID-223265.news.uni-berlin.de>

there is a function in python 2.3 called enumerate.


>>> l = range(0,51,5)
>>> e = enumerate(range(0,51,5))
>>> e
<enumerate object at 0x0119BBC0>
>>> list(e)
[(0, 0), (1, 5), (2, 10), (3, 15), (4, 20), (5, 25), (6, 30), (7, 35), (8,
40), (9, 45), (10, 50)]
>>> e = enumerate(range(0,51,5))
>>> for index, value in e:
...  print "The index of value %i is %i" % (value, index)
...
The index of value 0 is 0
The index of value 5 is 1
The index of value 10 is 2
.
.
.

if you are using an older version of python which doesn't have enumerate
you could do this
>>> l = range(0,51,5)
>>> zip(range(len(l)), l)
[(0, 0), (1, 5), (2, 10), (3, 15), (4, 20), (5, 25), (6, 30), (7, 35), (8,
40), (9, 45), (10, 50)]





From cookedm+news at physics.mcmaster.ca  Tue Jan 20 16:06:17 2004
From: cookedm+news at physics.mcmaster.ca (David M. Cooke)
Date: Tue, 20 Jan 2004 16:06:17 -0500
Subject: efficent test for array with only one value?
References: <00ird1-dmd.ln1@jowls.lairds.org>
	<PJYOb.82151$C87.70674@twister.socal.rr.com>
	<25mud1-s1m.ln1@jowls.lairds.org>
	<p63Pb.84084$C87.13614@twister.socal.rr.com>
	<tvpvd1-4sn.ln1@jowls.lairds.org>
Message-ID: <qnk65f6jpo6.fsf@arbutus.physics.mcmaster.ca>

At some point, Kyler Laird <Kyler at news.Lairds.org> wrote:

> Robert Kern <rkern at ucsd.edu> writes:
>
>>However, alltrue(a.flat == a.flat[0]) will work but won't short-circuit. 
>
> How did I miss that?!  Yes, that's the kind of operation I sought.
> I'm surprised that it doesn't short-circuit.  It *should*, right?
>
> It's a shame that it only works along a single axis.  The use of
> "flat" is a problem for me.  I'm looking at sections of an image
> (building a quadtree) so the arrays I'm checking are not contiguous.
> I think that means I have to resort to something ugly like this.
> 	Numeric.alltrue(Numeric.alltrue(a == a[0,0]))
> That eliminates many opportunities for short-circuiting.
>
> I can also flatten the array using reshape() before checking it.  I
> assume that also means a lot of possibly unnecessary operations.
> (Does reshape() return a copy of the array or just an array with
> the original data and a new shape?)

In general, use ravel() instead of .flat.
ravel() is a simple wrapper around reshape(), which will make a
contiguous only if necessary. .flat will fail for non-contiguous arrays
(like views into another array).

-- 
|>|\/|<
/--------------------------------------------------------------------------\
|David M. Cooke
|cookedm(at)physics(dot)mcmaster(dot)ca


From loic at yermat.net1.nerim.net  Sat Jan 24 05:27:17 2004
From: loic at yermat.net1.nerim.net (Yermat)
Date: Sat, 24 Jan 2004 11:27:17 +0100
Subject: Python & Databases ?
In-Reply-To: <4011bcd6$0$4051$afc38c87@news.optusnet.com.au>
References: <4011bcd6$0$4051$afc38c87@news.optusnet.com.au>
Message-ID: <buth9r$s3$1@biggoron.nerim.net>

Peter Moscatt a ?crit :
> Will Python work with any of the databases like MySQL... ?
> 
> Pete

http://www.python.org/topics/database/
http://www.python.org/topics/database/modules.html



From carroll at tjc.com  Sun Jan 18 20:29:55 2004
From: carroll at tjc.com (Terry Carroll)
Date: Mon, 19 Jan 2004 01:29:55 GMT
Subject: Simple (?) Regular Expression Question
References: <6747bc9d.0401181545.2b4ffb14@posting.google.com>
Message-ID: <ff9m00pnjkhs9n1vi3agk3nkm4bditvprj@4ax.com>

On 18 Jan 2004 15:45:31 -0800, slzatz at hotmail.com (Steve Zatz) wrote:

>Is '@' a special character in regular expressions?  I am asking
>because I don't understand the following:
>
>>>> import re
>>>> s = ' @'
>>>> re.sub(r'\b@','*',s)
>' @'
>>>> s = ' a'
>>>> re.sub(r'\ba','*',s)
>' *'
>
>Have googled atsign and regular expressions but have not found
>anything useful.  System is Win XP, Python 2.3.3. Any help would be
>appreciated.

I suck at regular expressions, but I think that what's going on here is
that \b matches an empty string, but only at the start or end of a word.
In the first case ("\b@" and " @"), there is no start-of-word, so no
match, no substitution.

In the second case ("\ba" and " a", you have \b matching the empty string
between the blank and the "a", because the "a" is considered a word.

"a" is going to be considered a word, because it's entirely composed of
letters and numbers (a single letter), while "@" is not.




From a.schmolck at gmx.net  Sun Jan 11 07:54:50 2004
From: a.schmolck at gmx.net (Alexander Schmolck)
Date: 11 Jan 2004 12:54:50 +0000
Subject: Emacs python mode question
References: <pan.2004.01.10.21.08.16.172000@hotmail.com>
	<mailman.274.1073771373.12720.python-list@python.org>
	<pan.2004.01.10.22.04.08.125000@hotmail.com>
	<mailman.275.1073773564.12720.python-list@python.org>
	<pan.2004.01.11.10.14.55.843000@hotmail.com>
Message-ID: <yfslloesl0l.fsf@black132.ex.ac.uk>

jblazi <jblazi at hotmail.com> writes:

> On Sat, 10 Jan 2004 16:25:59 -0600, Skip Montanaro wrote:
> 
> > (define-key esc-map [g] 'goto-line)
> 
> For one reason or the other, this does not work. 

It doesn't work because the above will specifically set ESC-g to goto-line,
which isn't what you want, I guess. Try either of the following:

(global-set-key [(meta g)] 'goto-line)
(global-set-key "\eg" 'goto-line)

Before you save your .emacs you can verify that the command works by pressing
C-xC-e right after the closing ')' and then M-g.

'as


From afriere at yahoo.co.uk  Tue Jan 13 19:22:19 2004
From: afriere at yahoo.co.uk (Asun Friere)
Date: 13 Jan 2004 16:22:19 -0800
Subject: Does anyone else not find the fun in programming...?
References: <d232c5e.0401130823.27fd26ff@posting.google.com>
Message-ID: <38ec68a6.0401131622.2725b690@posting.google.com>

chris.lyon at spritenote.co.uk (Chris Lyon) wrote in message news:<d232c5e.0401130823.27fd26ff at posting.google.com>...
> I find python very effective as a language and can generally project
> most of my hazy thoughts into it. But FUN !!! This is work dammit,
> I have now ground my teeth down from the number of times I read that
> programming is fun. Football (association) is fun, walking along
> canals is fun, Arguing about quite how useless the British Government
> is fun but programming  ?
> 
> Do I need help ?
> 


Maybe you just need another vocation.  Work and fun are not
necessarily mutually exclusive.  Considering the proportion of your
life you will spend at work, you ought to make damn sure they aren't!

Programming is such fun that I'm happy (almost) every day to be going
to work.  Which is more than I can say about various other jobs I've
had.  OK so maybe it can be painful at times (like when I have to work
with XSLT :o), but designing and implementing solutions in Python (or
watching my little creatures take on a life of their own - which is
how I look at OOP - hmm maybe I need help?), is just plain fun.  Which
is not to say football, walking and arguing are not.


From hatespam at fakeemail.com  Tue Jan 13 23:32:56 2004
From: hatespam at fakeemail.com (Dan Olson)
Date: Tue, 13 Jan 2004 22:32:56 -0600
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
	<pan.2004.01.14.01.17.00.970198@fakeemail.com>
	<bu2ana$bmpci$1@ID-207230.news.uni-berlin.de>
Message-ID: <pan.2004.01.14.04.32.52.403279@fakeemail.com>

On Tue, 13 Jan 2004 19:00:43 -0800, Brandon J. Van Every wrote:

> I'm curious what sky is going to fall if I don't follow your advice?

It's just advice.  I think it would have been smoother for everyone if
you'd followed it, but apparently you prefer to piss on my advice so
that's cool too.


From reply.in.the.newsgroup at my.address.is.invalid  Tue Jan 20 16:06:10 2004
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Tue, 20 Jan 2004 22:06:10 +0100
Subject: Installing SpamBayes
References: <400c399b_2@newsfeed.slurp.net>
Message-ID: <up5r00hr648soiun3j6q326ga9n808hf17@4ax.com>

Dog at will.hunt:
>It says to run the setup.py file using the following command in IDLE 

Where does it say that? The wordt "idle" doesn't appear on 
http://cvs.sourceforge.net/viewcvs.py/*checkout*/spambayes/spambayes/README.txt?rev=HEAD&content-type=text/plain

>in the directory that I extracted the spambayes files into: python setup.py 
>install.
>
>When I do this, it tells me that python is not a recognized command.
                 ^^
What exactly is "it"? Is it a Unix/Linux shell, or the Windows command
interpreter?

-- 
Ren? Pijlman


From carroll at tjc.com  Thu Jan  8 21:55:14 2004
From: carroll at tjc.com (Terry Carroll)
Date: Fri, 09 Jan 2004 02:55:14 GMT
Subject: books
References: <3FFDC029.AB0A4097@unet.univie.ac.at>
Message-ID: <5r5svvccvt4lqjnlaurftejbgluu1fepoc@4ax.com>

On Thu, 08 Jan 2004 20:40:08 GMT, Thomas Mang <a9804814 at unet.univie.ac.at>
wrote:

>I have programmed mostly in C++ lately, and I want to start learning
>Python now.
>
>Which books would you recommend to buy?
>
>I am both looking for an introduction into the language, as well as
>complete guides.

As an intro, I really liked O'Reilley's "Learning Python."  As a
reference, I *really* like their "Python In A Nutshell."

I didn't care much at all for their "Programming Python," but lots of
people swear by it, so your milage may vary.


From anthony at interlink.com.au  Sat Jan 10 23:34:32 2004
From: anthony at interlink.com.au (Anthony Baxter)
Date: Sun, 11 Jan 2004 15:34:32 +1100
Subject: RELEASED: Shtoom 0.1
Message-ID: <200401110434.i0B4YXK6008384@localhost.localdomain>

I'm happy to announce the first release of Shtoom. Shtoom is a Python
implementation of a voice over IP software phone, using the standard SIP
protocol. The first release features: 

  - basic calling functionality (can make and receive calls),
  - Qt, Gtk, Tkinter and text user interfaces (of varying degrees of 
    functionality), 
  - audio support for Linux/FreeBSD (using ossaudiodev) and Windows/MacOS X 
    (using PortAudio), 
  - audio codecs G711 (64kbit/s) and GSM 06.10 audio (3kbit/s) with an 
    optional extension,
  - firewall traversal via STUN.

It's been tested against Cisco IOS 12.3, Asterisk, kphone and linphone.

It's available from the website: http://shtoom.sf.net/

Future plans include: 
  - error handling <wink>
  - SIP registration support
  - A number of other applications, including shtam (answering machine) and
    shtoomcu (conferencing server).

Anthony
--
Anthony Baxter     <anthony at interlink.com.au>
It's never too late to have a happy childhood.



From noemail at noemail4u.com  Thu Jan 29 08:10:23 2004
From: noemail at noemail4u.com (Dang Griffith)
Date: Thu, 29 Jan 2004 13:10:23 GMT
Subject: comparing booleans
References: <mailman.951.1075324969.12720.python-list@python.org>
	<40185112.264898A4@alcyone.com>
Message-ID: <eaa90cc908c7a217f0d6475e41c7622d@news.teranews.com>

On Wed, 28 Jan 2004 16:17:22 -0800, Erik Max Francis <max at alcyone.com>
wrote:

>Gerrit Holl wrote:
>
>> is it proper to compare booleans? It is possible, of course, because
>> they're compatible with numbers, but booleans aren't truly numbers.
>> I'm
>> tempted to write:
>> 
>>     return cmp(self.extends, other.extends)
>
>Even if you're seriously worried about the correctness of comparing
>Booleans, you can always explicitly turn them into integers:
>
>	return cmp(int(self.extends), int(other.extends))
>
>> (Hmm, makes me wonder, for booleans, are != and ^ equal?)
>
>Easily checked:
>
>>>> for x in (True, False):
>...  for y in (True, False):
>...   print x, y, x != y, x ^ y 
>... 
>True True False False
>True False True True
>False True True True
>False False False False

It's not always the same, as shown here:

>>> True != True != True
False
>>> True ^ True ^ True
True
>>> True != False != True != True
False
>>> True ^ False ^ True ^ True
True

Not that I've never used this (cool) Python syntax in practice,
but I thought it was worth mentioning that using != and ^ in
boolean expressions does not always give the same result.  It does
give the same result when there are only two operands.

Interestingly, and I'm not sure why:
>>> (True != True) != True
True
>>> True != (True != True)
True
>>> True != True != True
False

    --dang


From sidharthk at hotmail.com  Wed Jan 28 09:57:02 2004
From: sidharthk at hotmail.com (Sidharth Kuruvila)
Date: Wed, 28 Jan 2004 20:27:02 +0530
Subject: type() for new style classes - buggy?
References: <mailman.905.1075294929.12720.python-list@python.org>
Message-ID: <bv8isj$pg462$1@ID-223265.news.uni-berlin.de>



In the case of new style classes type actually doubles up as a class
constructor, so all classes including type itself are instances type.

>>> class A(object):
...  pass
...
>>> a = A()
>>> type(a)
<class '__main__.A'>
>>> type(A)
<type 'type'>
>>> isinstance(A, type)
True
>>> isinstance(a, type)
False
>>> isinstance(type, type)
True
>>>

hope this helps
there is some documentation on new style classes you might want to read.
http://www.python.org/doc/newstyle.html
particularly the first essay by Guido.






From tjreedy at udel.edu  Mon Jan 26 16:43:45 2004
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 26 Jan 2004 16:43:45 -0500
Subject: compress string of data
References: <bv0gev$2ni$1@nsnmrro2-gest.nuria.telefonica-data.net><mailman.765.1075042168.12720.python-list@python.org><wz4quj116k.fsf@nono.cs.uu.nl>
	<bv3bdd$a0j$3@news.service.uci.edu>
Message-ID: <bv41m2$ee0$1@sea.gmane.org>


"Josiah Carlson" <jcarlson at nospam.uci.edu> wrote in message
news:bv3bdd$a0j$3 at news.service.uci.edu...
> Piet van Oostrum wrote:
>
> >>>>>>Gerrit Holl <gerrit at nl.linux.org> (GH) wrote:
> >
> >
> >>>How i could compress string of data?.
> >>>
> >>>>>import zlib
> >>>>>zlib.compress("Hello, world")
> >
> > GH> 'x\x9c\xf3H\xcd\xc9\xc9\xd7Q(\xcf/\xcaI\x01\x00\x1b\xd4\x04i'
> >
> > GH> http://www.python.org/doc/current/lib/module-zlib.html
> >
> > Waw, that compresses it from 12 bytes to 20 bytes :=)
>
>
> There is no such thing as universal compression

Only if you specify invertibility (losslessness).

f(s) == '' compressess everything except '' itself ;-)

and that len(f(s)) < len(s) for some s and not just <= for all s (which
allows identity 'compression' f(s) == s).

> - some compressions  result in expansion.

Which is to say that if a 1-1 function maps some strings to smaller
strings, it must correspondingly map others to larger strings.  An
interesting CS tidbit that people keep discovering by stumbling over.

Lossless universal expansion is possible: f(s) == ' '+s.  But it is into
rather than onto, so only strings starting with ' ' can be inversely
mapped.


Terry J. Reedy






From jcarlson at nospam.uci.edu  Mon Jan 26 02:00:17 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Sun, 25 Jan 2004 23:00:17 -0800
Subject: efficient updating of nested dictionaries
In-Reply-To: <mailman.786.1075088534.12720.python-list@python.org>
References: <H%_Qb.2609$925.1917@nwrddc02.gnilink.net>
	<mailman.786.1075088534.12720.python-list@python.org>
Message-ID: <bv2e21$j5e$2@news.service.uci.edu>

> Although, that's probably kind of lame - I bet others will have much
> better suggestions. I'm interested in how other people do this too.
> Rich

String concatenation is not that lame, but I'd use tuples:
MY_DICT[(KEY_X, KEY_Y, KEY_Z)] = FOO

Tuples save on string operations.

  - Josiah


From ih8spam at spamtrap.com  Tue Jan 13 13:37:52 2004
From: ih8spam at spamtrap.com (WTH)
Date: Tue, 13 Jan 2004 13:37:52 -0500
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
Message-ID: <1008ek75iso5ca5@corp.supernews.com>

You have the greatest inherent ability to insult the largest number of
people with the smallest amount of effort.
You are truly a legend in your own mind.

    WTH




From bh at intevation.de  Fri Jan  9 06:41:06 2004
From: bh at intevation.de (Bernhard Herzog)
Date: Fri, 09 Jan 2004 12:41:06 +0100
Subject: PRE-PEP: new Path class; mutability, __hash__, __eq__, __cmp__
References: <vvivefh35qjv9a@news.supernews.com>
	<3FFA7E82.4020609@beyond-thoughts.com>
	<mailman.159.1073418070.12720.python-list@python.org>
	<3FFC9209.7060703@beyond-thoughts.com>
	<mailman.185.1073563995.12720.python-list@python.org>
	<mailman.199.1073604223.12720.python-list@python.org>
Message-ID: <6qad4xmjsd.fsf@salmakis.intevation.de>

Christoph Becker-Freyseng <webmaster at beyond-thoughts.com> writes:

> So for __eq__ it follows naturaly
> def __eq__(self, other):
> 	FIXME: isinstance checking
> 	return (str(self.normalized()) == str(other.normalized()))
> It cares about nonexistent paths, too. (The samefile-solution won't --- 
> we might code a special case for it ...)

What exactly does normalized() do?  If it's equivalent to
os.path.normpath, then p1 == p2 might be true even though they refer to
different files (on posix, a/../b is not necessarily the same file as
b).  OTOH, if it also called os.path.realpath too to take symlinks into
account, __eq__ would depend on the state of the filesystem which is
also bad.

IMO __eq__ should simply compare the strings without any modification.
If you want to compare normalized paths you should have to normalize
them explicitly.


   Bernhard

-- 
Intevation GmbH                                 http://intevation.de/
Sketch                                 http://sketch.sourceforge.net/
Thuban                                  http://thuban.intevation.org/


From mahasamatman at nm.ru  Thu Jan  1 11:34:18 2004
From: mahasamatman at nm.ru (Rimidalv)
Date: Thu, 01 Jan 2004 18:34:18 +0200
Subject: UML tools for python
In-Reply-To: <13dc97b8.0312301543.39192aa2@posting.google.com>
References: <13dc97b8.0312301543.39192aa2@posting.google.com>
Message-ID: <bt1i6i$7jp$1@sea.gmane.org>

Andy Bulka wrote:
> Whilst almost responding to the 'dream project' thread I decided that
> this post warranted its own thread.  What about a solid UML tool with
> round trip functionality for the Python Community?
> 
> Some attempts at reverse engineering python are
>   PyReverse http://www.logilab.org/projects/pyreverse/
>   PyUt http://pyut.sourceforge.net/ 
>   PyNSource  http://www.atug.com/andypatterns/pynsource.htm
>   Boa Constructor  http://sourceforge.net/projects/boa-constructor/
>   IDLE's class browser
>   PythonWin 's class browser
> all of which have their problems and limitations.  
> 
> E.g. PyUt will hang if it cannot __import__ successfully and its GUI
> has no zoom nor scroll etc.  PyReverse is hard to use, misses a lot of
> basic information and then what do you do with the XML files? - who
> will read these?  I have to edit them manually to import them into
> Enterprise Architect
>   http://www.sparxsystems.com.au
> and the last time I tried, you couldn't import into 
>   Poseidon  http://www.gentleware.com/products/index.php4
> community edition, which is the better descendant of the free Argo.
> 
> Some Java-centric UML tools I believe do export python, though this is
> usually very simple and usually broken.  For example
>   Object Domain  http://www.objectdomain.com/products/od/overview.do
> claims to import python code, but the last I looked, this particular
> functionality was fragile.
> 
> Potential powerful technology that could be used is
>   Bicycle Repair Man  http://bicyclerepair.sourceforge.net/
> a refactoring tool for Python which could be combined with some sort
> of Java GUI (with zoom and all those niceties) - since the hard bit of
> the problem is parsing python reliably and knowing how to change it /
> regenerate it nicely.  Bicycle Repair Man already treads deeply in
> this territory.  Also
>   PyChecker http://pychecker.sf.net/
> walks similar territory.
> 
> Ideal tools would look and behave something like
>  ModelMaker (for Delphi) http://www.modelmakertools.com/
>  TogetherJ  http://www.togethersoft.com/products/index.jsp
> where you can work in code or in diagrams and the two are seamlessly
> kept in synch.  Its truly cool, and I wish I could do these sorts of
> things in Python.
> 
> Does anybody know of any other work being done in this area?
> 
> Do we think that having a solid UML tool with full round trip
> facilities plus gorgeous GUI - build specifically for Python is a
> worthy goal?  Is anybody going to bother to build such a tool for
> free?
> 
> Andy Bulka
> http://www.atug.com/andypatterns
Try Dia http://www.lysator.liu.se/~alla/dia/
also  autodia http://droogs.org/autodia/
and if you Google a little i guess that you can find dia2code (sorry 
couldn't find url)




From oren-py-l at hishome.net  Mon Jan  5 16:43:37 2004
From: oren-py-l at hishome.net (Oren Tirosh)
Date: Mon, 5 Jan 2004 16:43:37 -0500
Subject: PRE-PEP: new Path class
In-Reply-To: <vvivefh35qjv9a@news.supernews.com>
References: <vvivefh35qjv9a@news.supernews.com>
Message-ID: <20040105214337.GA87075@hishome.net>

On Mon, Jan 05, 2004 at 10:06:59AM -0500, John Roth wrote:
> I'm adding a thread for comments on Gerrit Holl's pre-pep, which
> can be found here:
> 
> http://tinyurl.com/2578q
> 
> Frankly, I like the idea. It's about time that all of the file
> and directory stuff in the os module got objectified
> properly (or at least with some semblance of OO propriety!)

"Peroperly"? There is nothing particularly "proper" or "improper" 
about objects or any other programming paradigm supported by Python.  
Objectifying is not a goal in itself. I like the Path object because 
the interface is easier to learn and use, not because it is 
"objectified". 

> 5) Should == operator be the same as os.path.samefile()?
> 
> Why not...

No. Symbolic links are something you would sometimes want to treat as 
distinct from the files they point to. 

> walk is a nice function, but it should be redone to
> use the visitor pattern directly, with different method
> names for files, directories and whatever else a
> particular file system has in it's warped little mind.

I find a generator and a couple of elifs are much easier to read. No 
need to define a class, pass context information to the methods of 
that class, etc.

> 13) chdir, chmod, etc?
> 
> No. This has nothing to do with pathname.

What's the difference between chmod and touch? They both affect the
file metadata in similar ways.

    Oren




From neilmacgaffey at yahoo.com  Fri Jan 23 09:38:08 2004
From: neilmacgaffey at yahoo.com (Neil MacGaffey)
Date: Fri, 23 Jan 2004 06:38:08 -0800 (PST)
Subject: file open problem
Message-ID: <20040123143808.80139.qmail@web14702.mail.yahoo.com>

Hi  - I'm new to python and am stymied by something
that should be simple.  The file open command below
works fine on my desktop machine, but I cant get it to
work on my laptop.  Since using Python on my laptop is
realistically the only way I'm going to find the time
to learn Python, this is a big problem for me.  Here's
what I'm up against:

 PythonWin 2.3.3 (#51, Dec 18 2003, 20:22:39) [MSC
v.1200 32 bit (Intel)] on win32.
Portions Copyright 1994-2001 Mark Hammond
(mhammond at skippinet.com.au) - see
'Help/About PythonWin' for further copyright
information.
>>> fobj = open(r'c:\temp\pytest.txt','r')
Traceback (most recent call last):
  File "<interactive input>", line 1, in ?
IOError: [Errno 2] No such file or directory:
'c:\\temp\\pytest.txt'

The laptop is a Sony VIAO that's about 2 years old. 
Its running Windows 2000, SP4.  The desktop is an
older machine, but with the same Windows environment. 
I've obtained a fresh download of Python 2.3.3 and the
Win32 extension and have re-installed both a couple of
times with no apparent problems.  I also tried
dropping back to Python 2.3.2, but had same result. 
Any ideas as to what I should be looking at on this
laptop that might be causing the problem?

Thank you
Neil

__________________________________
Do you Yahoo!?
Yahoo! SiteBuilder - Free web site building tool. Try it!
http://webhosting.yahoo.com/ps/sb/



From borco at go.ro  Fri Jan 16 07:53:56 2004
From: borco at go.ro (Ionutz Borcoman)
Date: 16 Jan 2004 04:53:56 -0800
Subject: Project dream
References: <cb035744.0312261236.11d785ac@posting.google.com>
Message-ID: <80dac0f4.0401160453.a36ff7d@posting.google.com>

hwlgw at hotmail.com (Will Stuyvesant) wrote in message news:<cb035744.0312261236.11d785ac at posting.google.com>...
> Suppose you have the time and the money to start a new project in
> Python.  What would you like to do?

I want to do a 'Where Is It?' clone in Python. Probably use Metakit
and e4graph as the database. PyGTK or WxPython for the GUI (most
probably PyGTK).

I'll probably do it anyway, but money would help a lot :)

ionutz


From Kyler at news.Lairds.org  Sun Jan 18 17:12:06 2004
From: Kyler at news.Lairds.org (Kyler Laird)
Date: Sun, 18 Jan 2004 22:12:06 GMT
Subject: Does MLab.std() dislike Numeric.UnsignedInt8?
Message-ID: <j3ard1-i9d.ln1@jowls.lairds.org>

	Python 2.3.3 (#2, Jan  4 2004, 12:24:16)
	[GCC 3.3.3 20031229 (prerelease) (Debian)] on linux2
	Type "help", "copyright", "credits" or "license" for more information.
	>>> import Numeric
	>>> import MLab
	>>> import Scientific.Statistics
	>>> MLab.std(Numeric.array([255,255], Numeric.Int0))
	0.0
	>>> MLab.std(Numeric.array([255,255], Numeric.UnsignedInt8))
	181.01933598375618
	>>> Scientific.Statistics.standardDeviation(Numeric.array([255,255], Numeric.UnsignedInt8))
	0.0

It seems to me that the return values should all be the same.  Am I missing
something simple?

--kyler


From hans at zephyrfalcon.org  Fri Jan 23 14:14:46 2004
From: hans at zephyrfalcon.org (Hans Nowak)
Date: Fri, 23 Jan 2004 14:14:46 -0500
Subject: C compilers
In-Reply-To: <X59Qb.20838$q4.11416@newsread3.news.atl.earthlink.net>
References: <X59Qb.20838$q4.11416@newsread3.news.atl.earthlink.net>
Message-ID: <401172A6.40000@zephyrfalcon.org>

Lucas Raab wrote:
> I realize that this is a Python newsgroup, but do any of you know any good
> C/C++ compilers?? I'm interested in imbedding C with Python.

Hmm, gcc?  You don't mention the platform you're using, but it's available for 
just about any OS.

-- 
Hans (hans at zephyrfalcon.org)
http://zephyrfalcon.org/





From axel.mittendorf at transfertech.de  Thu Jan 15 07:19:31 2004
From: axel.mittendorf at transfertech.de (axel.mittendorf at transfertech.de)
Date: Thu, 15 Jan 2004 13:19:31 +0100
Subject: [PyQT] NULL tstate
Message-ID: <40068553.3E80025A@transfertech.de>

Hi, I got a problem in a multithreaded PyQT application 
that uses the translate method from the QApplication class.
The last thing it does is:

self.cmd_anything.setAccel(self.__tr("Alt+S"))

__tr is:

def __tr(self,s,c =None):
   return qApp.translate( "Form_anything", s,c)

after this the application quits with this error message:
Fatal Python error: PyEval_SaveThread: NULL tstate

Does anyone know what this is?

TIA, Axel


From theller at python.net  Wed Jan 28 14:35:05 2004
From: theller at python.net (Thomas Heller)
Date: Wed, 28 Jan 2004 20:35:05 +0100
Subject: How to detect that a key is being pressed, not HAS been pressed
 earlier!??
References: <6ed33425.0401281103.61987e72@posting.google.com>
Message-ID: <wu7bhno6.fsf@python.net>

runed at stud.cs.uit.no (Rune) writes:

> Hey
>
> I'm trying to build a gui application and need to know if the user is
> actually holding down the shift or ctrl key. That is, if the user
> currently is holding down the shift key. In pseudo code this will boil
> down to something like this:
>
> def test:
>   if user presses shift:
>     return SHIFT_IS_PRESSED
>   elif user presses ctrl:
>     return CTRL_IS_PRESSED
>   else
>     return false
>
> It's important to notice here that I'm not interested if the user has
> already pressed shift or ctrl. I'm only interested in knowing if he is
> currently holding down one of these keys. (I have looked into msvcrt
> and the like but have found no answer..) The function should also work
> in both windows and Linux.

No idea about linux, but on windows you use win32api.GetKeyState().

Thomas


From goodger at python.org  Mon Jan 26 11:18:18 2004
From: goodger at python.org (David Goodger)
Date: Mon, 26 Jan 2004 11:18:18 -0500
Subject: unittest
In-Reply-To: <cthoesqage6.fsf@lcpxdf.wm.lc.ehu.es>
References: <cthu12j9id5.fsf@lcpxdf.wm.lc.ehu.es>	<mailman.797.1075127834.12720.python-list@python.org>
	<cthoesqage6.fsf@lcpxdf.wm.lc.ehu.es>
Message-ID: <40153DCA.8090401@python.org>

Zunbeltz Izaola wrote:
 > Tnaks, why is this so?

 From the fine manual
(http://www.python.org/doc/current/lib/minimal-example.html):

     A testcase is created by subclassing unittest.TestCase. The three
     individual tests are defined with methods whose names start with
     the letters "test". This naming convention informs the test runner
     about which methods represent tests.

The convention is necessary because you might want methods that are
*not* tests.

-- David Goodger




From tim.one at comcast.net  Fri Jan 23 01:06:04 2004
From: tim.one at comcast.net (Tim Peters)
Date: Fri, 23 Jan 2004 01:06:04 -0500
Subject: Mixing protocols in pickles?
In-Reply-To: <40107C70.13CA8495@alcyone.com>
Message-ID: <LNBBLJKPBEHFEDALKOLCKEGFIIAB.tim.one@comcast.net>

[Erik Max Francis]
> Is there any prohibition against mixing different protocols within the
> same pickle?

No.  The unpickling implementation has no idea which protocol is in use.
There's a ton of info about unpickling in 2.3's undocumented new
pickletools.py library module, BTW, and a symbolic pickle disassembler
(which would be especially useful here).

Try getting gzip out of your test program; pickles are exercised more
heavily than gzip.  Try it with both pickle and cPickle; it might matter.

...

> So I thought it would be clever to write the tag string with
> protocol 0 so it would show up in a file viewer as plain text
> and then write the rest of the data with protocol 1

A protocol 1 string pickle just contains the raw string bytes; that's the
same stuff for printable ASCII as proto 0 produces, and is *more* readable
if you're using "funny characters" (a proto 0 string pickle replaces funny
characters with Python string escape sequences).

...

> This works fine on Unix, but on Windows it generates the (utterly
> puzzling) error:

...

>   File "C:\My Documents\botec-0.1x1\botec.py", line 1666, in load
>     system = pickle.load(inputFile)
> ImportError: No Module named copy_reg
> >>>

That's especially puzzling to me because that error message isn't one Python
produces:  all messages of this form produced by the core spell it "module"
instead of "Module".

> ...
> So I guess there are a few questions:  Why is the error being
> generated so obscure and seemingly incorrect?

Not enough info to say.

> Is it really the case that mixing multiple protocols within the same
> pickle isn't allowed,

No, the unpickler doesn't care (read pickletools.py for a full explanation
of why it doesn't care).

> or is this truly a bug

Somewhere, yes, but not necessarily in pickle.

> (or, say, a Windows-specific problem because protocol 0 requires that
> the pickle file be in text mode?)?

No, that protocol 0 used to be called "text mode" was a horrid mistake.
Pickle files should always be opened (for both reading and writing) in
binary mode, regardless of the pickle protocol.  It so happens you can *get
away* with using text-mode files on Windows for (only) protocol 0 pickles,
but that's more by accident than design.




From none at none.com  Wed Jan 14 09:42:52 2004
From: none at none.com (Derek)
Date: Wed, 14 Jan 2004 09:42:52 -0500
Subject: I come not to bury C++, but to praise it...
References: <mailman.337.1074032524.12720.python-list@python.org>
	<bu1uul$cam92$1@ID-46268.news.uni-berlin.de>
	<cu%Mb.47396$8H.99443@attbi_s03>
Message-ID: <bu3khe$dbm5v$1@ID-46268.news.uni-berlin.de>

"Rainer Deyke" wrote:
> > You also seem to have a narrow view of C++ as a
> > strictly OO language when in fact it supports several
> > programming paradigms (write whatever you want: template
> > metaprograms, modules, procedures, classes, etc.).
>
> C++ is rather similar to Python in this respect. ;-)
>
> I currently have two languages that I regularily use: C++
> and Python.  C++ produces faster programs, gives direct
> access to the hardware, and has many third-party libraries
> that Python doesn't have.  Python is more concise, more
> flexible, safer, and has its own set of libraries that C++
> doesn't have.  Both have their place.  None of the other
> languages I've looked at (with the possible exception of
> Common Lisp) seem to offer me anything that I can't find in
> either Python or C++, and many of them (Java in particular)
> are far too restrictive for my taste.

I also use C++ and Python as my main languages and I agree with your
comments.  However, I don't agree that Python is inherently "safer"
than C++.  At best I see it as a tie.  For example, C++ let's you
corrupt memory among other "unsafe" things, most of which can be
avoided by using standard containers, smart pointers, etc.  Python
lets you do "unsafe" things such as passing an object to a function
when it makes no sense to do so, which can lead to nasty runtime
surprises.




From mhammond at skippinet.com.au  Fri Jan 30 18:37:06 2004
From: mhammond at skippinet.com.au (Mark Hammond)
Date: Sat, 31 Jan 2004 10:37:06 +1100
Subject: Problems with python23_d.lib built with Visual Studio 7.1
In-Reply-To: <mailman.960.1075340543.12720.python-list@python.org>
References: <mailman.960.1075340543.12720.python-list@python.org>
Message-ID: <bvepr8$1eqh$1@arachne.labyrinth.net.au>

Paton J. Lewis wrote:

> I built the Python 2.3.3 sources with Visual Studio 7.1 (the 
> conversion of the Visual C++ 6 project files appeared to work 
> without a hitch). Everything seems fine except when I try to link my 
> project with the debug Python library, in which case I get 
> unresolved symbols apparently because the Python debug library 
> symbol names have been modified in an unexpected fashion. For 
> example, the calling code asks for symbol __imp__Py_InitModule4 
> (which exists in python23.lib) but python23_d.lib contains 
> __imp__Py_InitModule4TraceRefs. Has anyone run into this problem 
> before?

It sounds to me like you are trying to link your non-debug built 
extension module with a debug built Python.  A debug built extension 
module will not have a reference to __imp__Py_InitModule4.

Make sure the code you are trying to link against Python23_d.dll is 
compiled with /DDEBUG /D_DEBUG and /MDd.

Mark.




From mborgerding at cinci.rr.com  Thu Jan 15 21:46:31 2004
From: mborgerding at cinci.rr.com (Mark Borgerding)
Date: Fri, 16 Jan 2004 02:46:31 GMT
Subject: python & mathematical methods of picking numbers at random
In-Reply-To: <bu6tbl$pmn$1@solaris.cc.vt.edu>
References: <bu6ptu$kjm$1@solaris.cc.vt.edu>
	<7xd69largm.fsf@ruckus.brouhaha.com>
	<bu6tbl$pmn$1@solaris.cc.vt.edu>
Message-ID: <bgINb.9468$f97.372@fe3.columbus.rr.com>

Bart Nessux wrote:
> Paul Rubin wrote:
> 
>> Bart Nessux <bart_nessux at hotmail.com> writes:
>>
>>> I am using method 'a' below to pick 25 names from a pool of 225. A
>>> co-worker is using method 'b' by running it 25 times and throwing out
>>> the winning name (names are associated with numbers) after each run
>>> and then re-counting the list and doing it all over again.
>>>
>>> My boss thinks that 'b' is somehow less fair than 'a',
>>
>>
>>
>> Both are the same, as you can see by calculating the probability of
>> any given name being selected.  What is the application, and the
>> computer environment?  You may also need to worry about correlations
>> in the underlying Mersenne Twister PRNG.  If the application is
>> something where randomness is very important (you're picking winners
>> for a big lottery or something) then you should use a better RNG.
> 
> 
> We're raffling off crock-pots... that's why I think this is OK for our 
> purposes.
> 

Some will claim you cooked the numbers, even if it is a crock.
Let 'em blow off some steam, but don't chicken out. If you let them stew 
for a day, they'll soften up and you'll eventually reach a cord.



From opengeometry at yahoo.ca  Sun Jan 18 02:51:13 2004
From: opengeometry at yahoo.ca (William Park)
Date: 18 Jan 2004 07:51:13 GMT
Subject: Best way to do this?
References: <100jg9er3qak890@corp.supernews.com>
Message-ID: <buddtg$gdmvb$1@ID-99293.news.uni-berlin.de>

Wil Schultz <newz at rekon.org.nospam> wrote:
> One of the exercises asks for a program to ask for a password three 
> times. Surprisingly this took me much longer that it probably should 
> have so I am curious if the following is the easiest way this is done. 
> Thanks much!
> 
> *************************************************
> #!/usr/local/bin/python
> 
> count = 0
> password = "null"
> 
> while count < 3:
>          count = count + 1
>          password = raw_input("what's the pass: ")
>          if password == "mypass":
>                  print "Access Granted"
>                  count = 3
>          else:
>                  if count < 3:
>                          print "Try Again"
>                  else:
>                          print "Too Bad"
> *************************************************

For crying out loud, here's 3 times for you...
    password = raw_input("what's the pass: ")
    password = raw_input("what's the pass: ")
    password = raw_input("what's the pass: ")
-- 
William Park, Open Geometry Consulting, <opengeometry at yahoo.ca>
Linux solution for data management and processing. 


From paul at prescod.net  Thu Jan 29 11:31:12 2004
From: paul at prescod.net (Paul Prescod)
Date: Thu, 29 Jan 2004 08:31:12 -0800
Subject: Get number of iteration
In-Reply-To: <bvbbmf$q1bkm$1@ID-111250.news.uni-berlin.de>
References: <bvbbd7$9rv$01$1@news.t-online.com>
	<bvbbmf$q1bkm$1@ID-111250.news.uni-berlin.de>
Message-ID: <40193550.5000502@prescod.net>

Diez B. Roggisch wrote:

>>If I iterate through a list, is there a way I can get the number of the
>>iteration: first, second, third, ...
>>
>>l = ["three", "four", "five", "six"]
>>for x in l
>>  print x
>>  print x.iteration()  # <- That's what I'm looking for!
>>  print "next"
 > ...
> 
> So usually x won't have an iteration-method. But of course you can alwas do
> this:
> 
> for i in xrange(len(l)):
>   x = l[i]
>   print x
>   print i
>   print "next"

In recent versions of Python there is an easier way:

 >>> for index, value in enumerate(["three", "four", "five", "six"]):
...    print index, value
...
0 three
1 four
2 five
3 six

  Paul Prescod





From nicolas.torzec at enssat.fr  Wed Jan 28 09:46:10 2004
From: nicolas.torzec at enssat.fr (Torzec Nicolas)
Date: Wed, 28 Jan 2004 15:46:10 +0100
Subject: strtotime?
In-Reply-To: <kvYPb.242$af7.175373@newshog.newsread.com>
References: <kvYPb.242$af7.175373@newshog.newsread.com>
Message-ID: <bv8hmr$5k4$1@news.univ-rennes1.fr>

have a look at the parsedate() method in the RFC822 package.
It may help you if your date is in "Internet format"

"parsedate(StringDate)
Attempts to parse a date according to the rules in RFC 2822. however, 
some mailers don't follow that format as specified, so parsedate() tries 
to guess correctly in such cases. date is a string containing an RFC 
2822 date, such as 'Mon, 20 Nov 1995 19:12:08 -0500'. If it succeeds in 
parsing the date, parsedate() returns a 9-tuple that can be passed 
directly to time.mktime(); otherwise None will be returned. Note that 
fields 6, 7, and 8 of the result tuple are not usable."


Leif K-Brooks wrote:
> PHP has a very nice strtotime function (http://php.net/strtotime) which 
> converts a date/time in virtually any format into a timestamp. Does 
> Python have a similar function?
> 




From pyxpcom at quixs.com  Thu Jan 15 13:38:43 2004
From: pyxpcom at quixs.com (Lars Heuer)
Date: Thu, 15 Jan 2004 19:38:43 +0100
Subject: needed PyXPCOM tutorial.
In-Reply-To: <425cc8d1.0401150908.287de0d8@posting.google.com>
References: <425cc8d1.0401150908.287de0d8@posting.google.com>
Message-ID: <1689232226.20040115193843@quixs.com>

Hello,

> i m in need of a PyXPCOM tutorial. it should explain using python
> (instead of JavaScript) for creating apps. if any body can point me to
> some web resources or a printed book .

I'm also interested, but my searches via Google etc. brings no
specific pyXPCOM tutorial.
It seems, that the pyXPCOM architecture isn't widely used; this
mailinglist is also very silent. ;)

The pyXPCOM Mozilla page is also dead or under construction:
http://pyxpcom.mozdev.org/

If someone has a tutorial or something, please send a link to the
mailinglist. :)

Best regards,
Lars




From na  Sat Jan  3 20:50:03 2004
From: na (Andrew)
Date: Sat, 3 Jan 2004 17:50:03 -0800
Subject: mysql python Newbie Question
Message-ID: <vvc80lb8mstue1@corp.supernews.com>

Hi I would like to create a program that accesses mysql from a gui on my
local computer "mysql is on a server"

but I am fairly new to python and programming GUI's in general

What I would like this program to do is be able to access my server and
change update add and delete records from my databases without having to
write sql.

I can create the GUI fairly easily but I do not know how I or what functions
and modules would be needed to do this or how to write them "Forgive me if I
sound to Newb"

If someone out there could help me out maybe offer advice or even better
some code to build on that would be cool

Thanks in advance

Cheers

Andrew




From bik.mido at tiscalinet.it  Mon Jan 26 14:45:19 2004
From: bik.mido at tiscalinet.it (Michele Dondi)
Date: Mon, 26 Jan 2004 20:45:19 +0100
Subject: perl bug File::Basename and Perl's nature
References: <7fe97cc4.0401242131.22acf485@posting.google.com>
Message-ID: <tmqa10d6a542ma6k1ao6tnupvj0gbtser7@4ax.com>

On 24 Jan 2004 21:31:36 -0800, xah at xahlee.org (Xah Lee) wrote:

>Just bumped into another irresponsibility in perl.
[snip]
>expletive Perl and Perl slinging morons.

Taking into account the aggressive and trollish tone of your post I'm
surprised by how polite the answers you got are. Nay, I found
interesting the OT about OSes and file versions: a proof that a bad
seed can give good fruits!

I don't know why I'm taking care of answering you seriously, but if
you don't like "Perl's nature", why are you bothering with it in the
first place? If you can't stand its real/presumed *nix-isms, why are
you using it?

Also, you may have noticed it, but this is a discussion group about
*Perl* and people here is highly likely to be fond of Perl, appreciate
its "nature" and so on... so what did you expect to receive as an
answer to your post?

What do you gain in particular by criticizing an excellently and
*clearly* written piece of documentation (of an useful package!), by
exposing your failing to understand it because of your stupidity and
ignorance about a basic concept of the language like "pattern"?

>you'll see that it shouldn't be so. AND, the writting as usuall is
>fantastic incompetent. To illustrate, i quote:

Haha, thanks! I'll make that a .sig!


Michele
-- 
# This prints: Just another Perl hacker,
seek DATA,15,0 and  print   q... <DATA>;
__END__


From d.chirila at bucarest.finsiel.ro  Fri Jan 23 03:30:46 2004
From: d.chirila at bucarest.finsiel.ro (Dragos Chirila)
Date: Fri, 23 Jan 2004 10:30:46 +0200
Subject: private class members and hasattr
Message-ID: <04ff01c3e18b$330d28b0$2f01a8c0@dchirila>

Hi

I have the following class:

class PropTest:

    def __init__(self):
        self.prop1 = 1
        self._prop2 = 2
        self.__prop3 = 3

    def testprops(self):
        print 'has prop1 %s' % hasattr(self, 'prop1')
        print 'has _prop2 %s' % hasattr(self, '_prop2')
        print 'has __prop3 %s' % hasattr(self, '__prop3')


and the following test lines:

a = PropTest()
a.testprops()

The output of this is:

has prop1 1
has _prop2 1
has __prop3 0

Why hasattr method doesn't return 1(true) for private member '__prop3' ??

I tested it with Python 2.2.1 and 2.1.3 .

Thanks

Dragos




From reply.in.the.newsgroup at my.address.is.invalid  Sat Jan  3 05:34:31 2004
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Sat, 03 Jan 2004 11:34:31 +0100
Subject: End of file?
References: <3ff665fb$1@clarion.carno.net.au>
Message-ID: <mh6dvvcka6829s85lhfm53diu3ou7huuav@4ax.com>

Steve:
>I'm having trouble finding out if output from a pipe has finished (i.e. 
>I can't find tell if there's a EOF in output.readlines()). How do I do 
>this? Because readlines() can return empty lines and I can't simply 
>check if the line is empty.

You don't get an EOF from readlines().

"readlines([sizehint]) 

Read until EOF using readline() and return a list containing the lines
thus read."

http://www.python.org/doc/current/lib/bltin-file-objects.html

-- 
Ren? Pijlman


From jacek.generowicz at cern.ch  Tue Jan  6 08:43:11 2004
From: jacek.generowicz at cern.ch (Jacek Generowicz)
Date: 06 Jan 2004 14:43:11 +0100
Subject: Programming language from python
References: <mailman.31.1072763540.8134.python-list@python.org>
Message-ID: <tyfptdxgplc.fsf@pcepsft001.cern.ch>

"Alejandro Lombardo" <alejandro at cableonda.net> writes:

> Dear sirs:
> I need to create a programming language. Can this be done with the
> latest version of python? Is python the best computer programming
> language development tool in the entire universe? If it isn?t could you
> please tell me the name of the best computer programming language
> development tool in the entire universe?

Lisp.


From jepler at unpythonic.net  Sun Jan  4 20:28:43 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Sun, 4 Jan 2004 19:28:43 -0600
Subject: Python for Embedded Devices?
In-Reply-To: <221e7b06.0401041537.2896b22d@posting.google.com>
References: <efa6f675.0401021920.3bffced0@posting.google.com>
	<vvdl0nbogvm74@corp.supernews.com>
	<221e7b06.0401041537.2896b22d@posting.google.com>
Message-ID: <20040105012843.GC1075@unpythonic.net>

On Sun, Jan 04, 2004 at 03:37:46PM -0800, Phil Schmidt wrote:
> I am one such developer who works with very small systems: 8-bit
> micros with under 128K flash and 4K RAM. [...]

Luxury!  My current interest runs to microcontrollers with 2k flash, 128
bytes sram, and 128 bytes eeprom.  Yours sounds a lot like one of the
larger models in the same line, though. (Atmel AVR)

It's actually quite fun, and since 128 bytes is too little to use
recursion or dynamic allocation for anything, stuff like reference
counting and GC are unneeded---not a lot of strings, either.  C is a
not a bad language for this hardware.

Jeff



From corrada at dandenong.cs.umass.edu  Fri Jan  2 10:55:01 2004
From: corrada at dandenong.cs.umass.edu (Andres Corrada-Emmanuel)
Date: Fri, 2 Jan 2004 10:55:01 -0500 (EST)
Subject: optparse bug?
Message-ID: <Pine.SOL.4.31.0401021045540.15647-100000@fitzroy.cs.umass.edu>

Hi,

I'm getting a conflict between options defined between two different
scripts and I'm wondering if it is a bug or the intended effect.

script foo:

<def some_function>
<define some options with optparse functionality>

script bar:

from foo import some_function
<define options for bar script>

When I do ./bar --help I get foo's options! This is fixed by rewriting
bar.py so the import from foo occurs after parsing bar's options:

from optparse import OptionParser
<define options for bar script>
options, args = parser.parse_args()

from foo import some_function

This is mildly annoying behavior. Do I really have to reorder my import
statements to avoid importing options from other scripts?

Andres Corrada-Emmanuel
Senior Research Fellow
Center for Intelligent Information Retrieval
University of Massachusetts, Amherst




From webmaster at beyond-thoughts.com  Thu Jan  8 18:22:43 2004
From: webmaster at beyond-thoughts.com (Christoph Becker-Freyseng)
Date: Fri, 09 Jan 2004 00:22:43 +0100
Subject: PRE-PEP: new Path class; mutability, __hash__, __eq__, __cmp__
In-Reply-To: <mailman.185.1073563995.12720.python-list@python.org>
References: <vvivefh35qjv9a@news.supernews.com>	<3FFA7E82.4020609@beyond-thoughts.com>	<mailman.159.1073418070.12720.python-list@python.org>	<3FFC9209.7060703@beyond-thoughts.com>
	<mailman.185.1073563995.12720.python-list@python.org>
Message-ID: <3FFDE643.7090404@beyond-thoughts.com>

Gerrit Holl wrote:

> Christoph Becker-Freyseng wrote:
> 
>>Should Path be immutable like string?
> 
> 
> I have though about this, too. It should certainly not be fully mutable,
> because if a path changes, it changes. But maybe we could have a
> .normalise_inplace() which mutates the Path? What consequences would
> this have for hashability?
> 
> I like paths to be hashable. so they probably should be immutable.
> 
Yes. (already in the PEP)
While paths aren't strings they have a lot in common because paths (as I 
now think of them) are not directly associated with files. (Paths can be 
nonexistent or even invalid)

Moreover the basic operations like __eq__ shouldn't be reading methods ()!

__hash__ has to be compatible with __eq__.
hash(p1) == hash(p2)  <<<===   p1 == p2

Also
hash(p1) == hash(p2)  ===>>>   p1 == p2
should be true as far as possible.

I think
def __hash__(self):
	return hash(str(self.normalized()))
would do this fine.

So for __eq__ it follows naturaly
def __eq__(self, other):
	FIXME: isinstance checking
	return (str(self.normalized()) == str(other.normalized()))
It cares about nonexistent paths, too. (The samefile-solution won't --- 
we might code a special case for it ...)


What about __cmp__?
I've to admit that __cmp__ comparing the file-sizes is nice (__eq__= 
samefile is attractive, too --- they're both evil temptations :-) )

However __eq__ and __cmp__ returning possibly different results is odd.
Finaly implementing __cmp__ that way would make it a reading method and 
is problematic for nonexistent paths.

I'd like an implementation of __cmp__ which is more path specific than 
just string.__cmp__. But it should be consistent with __eq__.
Could we do something about parent and sub dirs?




Christoph Becker-Freyseng







From francisgavila at yahoo.com  Fri Jan  9 16:04:03 2004
From: francisgavila at yahoo.com (Francis Avila)
Date: Fri, 9 Jan 2004 16:04:03 -0500
Subject: Name of the function
References: <9e5ea2c4.0401080640.64ef5d58@posting.google.com>
	<btjuct$84v33$1@ID-217427.news.uni-berlin.de>
	<9e5ea2c4.0401081103.6fa93bf9@posting.google.com>
	<btmrq1$95lbb$1@ID-217427.news.uni-berlin.de>
Message-ID: <vvu5ru5ddkhn21@corp.supernews.com>


anton muhin wrote in message ...
>Olaf Meding wrote:
>> Is there a way to do this w/o importing another module?

You could use sys instead, which is IIRC initialized at python start-up,
even though the name isn't put in the namespace until 'import sys'.  So
strictly speaking, it's still importing, but there is no overhead.

sys._getframe().f_code.co_name

>> Yes this is what I was looking for except the code below requires
>> importing module inspect.
>I'm afraid that there is no way, at least none I'm aware of (except for
>Terry Reed suggestion, but I think it's not what you are looking for).
>
>Why you don't want to import a module?

I'll second that.  I'll even ask why you want the original binding name of
the function.  (When functions are first-class, the "name of the function"
becomes a bit meaningless.)  What are you doing?  We might be able to
suggest something better.

--
Francis Avila



From miki.tebeka at zoran.com  Wed Jan 28 02:48:14 2004
From: miki.tebeka at zoran.com (Miki Tebeka)
Date: 27 Jan 2004 23:48:14 -0800
Subject: Easy way to make EXEs...
References: <NMDRb.28013$i4.26542@newsread1.news.atl.earthlink.net>
Message-ID: <4f0a9fdb.0401272348.58eb7f62@posting.google.com>

Hello Xero,

> Okay, I am completely new to Python, and I really dont understand much, but
> I was wondering how to make a python script/program into a standalone .EXE?
> I dont understand py2exe at all, so if someone could tell me or find me an
> easy (For a newbie) to convert Python scripts to EXEs, please let me know!
Do try and read the FAQ.
http://www.python.org/doc/faq/programming.html#how-can-i-create-a-stand-alone-binary-from-a-python-script

HTH.
Miki


From jjl at pobox.com  Tue Jan 27 07:13:50 2004
From: jjl at pobox.com (John J. Lee)
Date: 27 Jan 2004 12:13:50 +0000
Subject: Guardian: open source is a throwback says Jack Schofield
References: <64cff82f.0401251143.328388bd@posting.google.com>
	<mailman.772.1075066543.12720.python-list@python.org>
	<bv1jkf$g46$1@namru.matavnet.hu>
	<bv1pgj$ctl$3@news.service.uci.edu> <40156FB6.F71C19B0@engcorp.com>
Message-ID: <87znc9mvwh.fsf@pobox.com>

> Josiah Carlson wrote:
[...]
> > http://www.whitehouse.gov/news/releases/2004/01/20040122-5.html
[...]
> I'm sorry, really, to bring this up, but as a Canadian I might be a little
> thick on this point, so help me out: was that site hacked?  Or is this for
> real?

I half expect him to be unmasked as Jim Carrey, and we're all in some
cheesy Hollywood movie...

Mind you, Peter:

A proof is a proof.
What kind of a proof?
It's a proof.
A proof is a proof.
And when you have a good proof,
it's because it's proven.

-- Jean Chretien

(some wag suggested this should be sung to the tune of "Mr. Ed" :-)


John


From ababo_2002 at hotmail.com  Sun Jan  4 11:42:09 2004
From: ababo_2002 at hotmail.com (Daniel Pryde)
Date: Sun, 04 Jan 2004 16:42:09 +0000
Subject: Array neighbourhoods
Message-ID: <BAY8-F22yz5H4AwcuZo000529e7@hotmail.com>

Thanks a lot for the advice. I'll give it a try. :)

Daniel

>"Daniel Pryde" <ababo_2002 at hotmail.com> wrote in message
>news:mailman.42.1072799018.8134.python-list at python.org...
> > Hi again.
> >
> > One thing I forgot to include in my post the other day. I was wondering 
>if
> > anyone knew of any fast algorithms for returning the surrounding
>neighbours
> > of an array element, or even the neighbours of a group of array 
>elements.
> >
>Try this (requires Python 2.3, since it uses sets).  Can't say how fast it
>is, but it handles all cases I can think of (edge effects, disjoint cells,
>etc.).  Maybe start with this to get going, then make it faster if it needs
>to be.
>
>
># matrixNeighbors.py
>from sets import Set
>
>def neighborhoodOf(cells, rows, cols):
>     ret = Set()
>     if type(cells) == tuple:
>         row,col = cells
>         for i in (-1,0,1):
>             for j in (-1,0,1):
>                 ret.add( (row+i, col+j) )
>         # remove original cell
>         ret.remove( cells )
>
>     elif type(cells) == list:
>         for cell in cells:
>             for neighbor in neighborhoodOf(cell,rows,cols):
>                 ret.add(neighbor)
>         # remove original cells
>         ret -= Set( cells )
>
>     # remove all entries in ret with negative values,
>     # or values greater than number of cols/rows
>     for x,y in ret.copy():
>         if x < 0 or y < 0 or x >= COLS or y >= ROWS:
>             ret.remove( (x,y) )
>
>     return list(ret)
>
># define matrix boundaries
>ROWS = 4
>COLS = 6
>
>print neighborhoodOf( (0,0), ROWS, COLS )
>print neighborhoodOf( (COLS-1,ROWS-1), ROWS, COLS )
>print neighborhoodOf( (COLS,ROWS), ROWS, COLS )
>print neighborhoodOf( [(0,0),(0,1)], ROWS, COLS )
>print neighborhoodOf( neighborhoodOf( (1,1), ROWS, COLS), ROWS, COLS )
>print neighborhoodOf( neighborhoodOf( (COLS-1,ROWS-1), ROWS, COLS), ROWS,
>COLS )
>print neighborhoodOf( neighborhoodOf( (COLS,ROWS), ROWS, COLS), ROWS, COLS 
>)
>
>
>

_________________________________________________________________
Tired of 56k? Get a FREE BT Broadband connection 
http://www.msn.co.uk/specials/btbroadband




From jzgoda at gazeta.usun.pl  Wed Jan 28 14:21:30 2004
From: jzgoda at gazeta.usun.pl (Jarek Zgoda)
Date: Wed, 28 Jan 2004 19:21:30 +0000 (UTC)
Subject: How to detect that a key is being pressed,
	not HAS been pressed earlier!??
References: <6ed33425.0401281103.61987e72@posting.google.com>
Message-ID: <bv923q$e7b$1@nemesis.news.tpi.pl>

Rune <runed at stud.cs.uit.no> pisze:

> It's important to notice here that I'm not interested if the user has
> already pressed shift or ctrl. I'm only interested in knowing if he is
> currently holding down one of these keys. (I have looked into msvcrt
> and the like but have found no answer..) The function should also work
> in both windows and Linux.

This event *is* available in WinAPI, but don't ask me where. I'm sure,
because VCL (which is built on top of WinAPI and uses standard Windows
messages) distinguishes KeyUp and KeyDown events. 

If you want to have it available also in linux, use Qt/PyQt.

-- 
Jarek Zgoda
Unregistered Linux User #-1
http://www.zgoda.biz/ JID:zgoda-a-chrome.pl http://zgoda.jogger.pl/


From donald.welch.nospam at hp.com  Sat Jan 10 14:28:09 2004
From: donald.welch.nospam at hp.com (djw)
Date: Sat, 10 Jan 2004 11:28:09 -0800
Subject: solving a small programm
References: <40004254$0$16669$ba620e4c@news.skynet.be>
	<40004743@usenet01.boi.hp.com>
	<40005064$0$1162$ba620e4c@news.skynet.be>
Message-ID: <4000526e@usenet01.boi.hp.com>

broebel wrote:

> If you look at this as a homework or not is of no interest to me but I
> like the way you explained which way to go to find the resolution.
> thanks (i solved it in a jiffy now)
> 

I think you missed my point (and Paul Rubin's). If this is indeed homework
or a class assignment, you should not be asking people on this newsgroup to
do the work for you. We are happy to give some small hints or some guidance
as a teacher or instructor would.

-d





From skip at pobox.com  Wed Jan 21 16:47:20 2004
From: skip at pobox.com (Skip Montanaro)
Date: Wed, 21 Jan 2004 15:47:20 -0600
Subject: shelve slow in python 2.3.3 for windows
In-Reply-To: <u1qt00t4nbubknpq2lmeovdk36gu9ekt3r@4ax.com>
References: <u1qt00t4nbubknpq2lmeovdk36gu9ekt3r@4ax.com>
Message-ID: <16398.62312.71037.418610@montanaro.dyndns.org>


    Marco> Try this program on Windows with python 2.3.3 and with python 2.2:

    Marco> import shelve 
    Marco> a=shelve.open("a", "c") 
    Marco> for x in xrange(10000): 
    Marco>      a[str(x)]=x 
    Marco>      print str(x) + "\r", 
    Marco> a.close() 

    Marco> After about 7000/8000 insertions, the program gets so slow...
    Marco> With python 2.2 it ends in a blink!
    Marco> Really strange, isn't it?

Perhaps not.  After running your script, what does

    whichdb.whichdb("a") 

report under both versions?  My wild-ass guess is that the underlying anydbm
module finds dumbdbm under 2.3.3 and something more industrial strength like
bsddb under 2.2.

Skip



From newsgroups at jhrothjr.com  Thu Jan 22 13:23:31 2004
From: newsgroups at jhrothjr.com (John Roth)
Date: Thu, 22 Jan 2004 13:23:31 -0500
Subject: I support PEP 326
References: <mailman.654.1074788734.12720.python-list@python.org>
Message-ID: <10105bn3bsi63c9@news.supernews.com>

"Gary Robinson" <grobinson at transpose.com> wrote in message
news:mailman.654.1074788734.12720.python-list at python.org...
> I've recently had a couple of cases of needing exactly what it proposes,
and
> having to kluge around the fact that it's not there. It's a great idea.
>
> If there anywhere else I should be expressing my opinion on this, let me
> know.

Just in case anyone can't find the PEP - it's the one that proposes
specific objects that will always sort highest and lowest.

I'm mildly in favor; it seems to be useful for some cases, and it
also seems easy enough to do. Of course, it would make None
the second smallest object.

John Roth
>
> --Gary
>
> -- 




From aaron at reportlab.com  Sat Jan 17 10:50:09 2004
From: aaron at reportlab.com (Aaron Watters)
Date: 17 Jan 2004 07:50:09 -0800
Subject: C# vs (stackless) python Re: Why learn Python ??
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<877jzwg1v2.fsf@pobox.com>
Message-ID: <9a6d7d9d.0401170750.65a3bf06@posting.google.com>

jjl at pobox.com (John J. Lee) wrote in message news:<877jzwg1v2.fsf at pobox.com>...
> "Bicho Verde" <bichoverde at sapo.pt> writes:
> C#: Java for MS .NET users (to first order, anyway).  .NET has broader
>  goals than Java for language interoperation, so even though Jim Hugunin
>  and others have done some initial work on a .NET implementation of
>  Python, dynamic languages like Python will likely never be full .NET
>  citizens (thanks to the design of the .NET CLR).  If that full
>  citizenship is important to you, C# has that advantage, but I'm
>  reliably informed it's fairly well-described as "a Java clone"
>  (implying programmer-inefficiency), so I'd be inclined to look for a
>  better language with a good .NET implementation.  Lisp?  Smalltalk?
>  (there was talk of an excellent .NET smalltalk implementation, but I'm
>  not sure whether that was vapourware or not...)

C# also fixes a lot of stupidities in java: for example a method can
"return" more than one new value and there is a syntax for first class-ish
callback methods (delegates) among the more prominent improvements.
Also C# is far friendlier to "legacy" code (than java was originally
intended to be).

>From a pure code beauty point of view (or point of me/us :) ) Python
is still easier to read thanks to things like slicing,
list/dictionary displays, and keyword arguments
but type safety is a really big win for larger projects, and of course
C# is much faster.  

And once you get some feeling for the namespace
hierarchy and the development environment I think it is a fairly
productive work environment.  Maybe more productive than python?
There are some easily fixable problems/irritations --
like the way IO uses preallocated buffers in C++ style, which is
irritating but easy to wrap away.  To my taste I'd definitely prefer
C# over lisp or smalltalk.

There is the portability thing, of course.  And python is free...

OTOH *stackless* python has some *really* compelling advantages over C#
-- like the ability to feasibly manage thousands of microthreads,
which I wouldn't advise in C#, java, or "normal" python....

   -- Aaron Watters
===
WIND THE FROG!


From james at logicalprogression.net  Mon Jan 19 11:29:27 2004
From: james at logicalprogression.net (James Henderson)
Date: Mon, 19 Jan 2004 16:29:27 +0000
Subject: subclassing "file"
In-Reply-To: <bugvp5$rvd$1@news.rz.uni-karlsruhe.de>
References: <bugvp5$rvd$1@news.rz.uni-karlsruhe.de>
Message-ID: <200401191629.27636.james@logicalprogression.net>

On Monday 19 January 2004 4:14 pm, Uwe Mayer wrote:
> Hi,
>
> when extending a build in class, what does the constructor __init__(...)
> have to return?
> and how does the constructor call its base-class construtor? (or is this
> done automatically?)
>
> I want to derive from "file" to create a class that reads record from a
> binary file:
>
> class myFile(file):
>         def __init__(self, filename, mode="r", bufsize=-1):
>                 ....?...
>
> just calling the basename and the constructor does not work:
> >>> f = myFile("testfile")
> >>> f
>
> <closed file '<uninitialized file>', mode '<uninitialized file>' at ...>
>
> What am I missing?

You don't show the second line of you __init__ method.  It should be:

file.__init__(self, filename, mode, bufsize)

James
-- 
James Henderson, Logical Progression Ltd.
http://www.logicalprogression.net/
http://sourceforge.net/projects/mailmanager/




From jacek.generowicz at cern.ch  Thu Jan  8 05:43:01 2004
From: jacek.generowicz at cern.ch (Jacek Generowicz)
Date: 08 Jan 2004 11:43:01 +0100
Subject: What psyco is goot at [Was: Rookie Speaks]
References: <3FFC9855.3070901@lawson.com>
	<pan.2004.01.07.23.38.51.236836@yahoo.com>
	<3FFC9A22.3020507@lawson.com>
	<pan.2004.01.08.00.03.13.66828@yahoo.com>
Message-ID: <tyfsmiqg1qi.fsf_-_@pcepsft001.cern.ch>

Samuel Walters <swalters_usenet at yahoo.com> writes:

> If you'd like to see an example of both the psyco and profile modules in
> action, let me know and I'll give you some more understandable code that I
> once wrote to see what types of things psyco is good at optimizing.

I think this is generally interesting, and would be curious to see it,
if you'd care to share.


From jjl at pobox.com  Wed Jan 14 19:55:59 2004
From: jjl at pobox.com (John J. Lee)
Date: 15 Jan 2004 00:55:59 +0000
Subject: PyQT: qt.qApp
References: <bu3pph$qma$01$1@news.t-online.com>
Message-ID: <87r7y2rpwg.fsf@pobox.com>

"Axel Mittendorf" <newsreply at transfertech.de> writes:
[...]
> in my application I want to subclass qt.QApplication and
> use this subclass instead of QApplication for my gui. Some
> of my modules are automatically generated by pyuic and
> I am not allowed to change their source code. The problem
> is these modules do "from qt import *" and use an object
> called 'qApp' which seems to be an instance of qt.QApplication

IIRC, qApp is *the* QApplication (there's only one QApplication
instance per application).


> and I want them to use my subclass (exactly its instance)
> instead of 'qApp'. How can I solve this?

I have a vague recollection that you can't, due to an obscure
limitation of either Qt or PyQt (or sip, maybe).  That might have
changed by now, though: ask on the PyKDE list.


> Can someone tell me what qt.qApp is and what it is used for?
> (I'm using PyQT 3.6.)

See above.


John


From sross at connectmail.carleton.ca  Sat Jan  3 14:05:09 2004
From: sross at connectmail.carleton.ca (Sean Ross)
Date: Sat, 3 Jan 2004 14:05:09 -0500
Subject: Integer math question
References: <3987e01c.0401030832.114c6f2a@posting.google.com>
	<11EJb.20461$Vl6.3782481@news20.bellglobal.com>
Message-ID: <UlEJb.20573$Vl6.3790333@news20.bellglobal.com>

Here's an interactive Python example to help clarify the previous response:

>>> a = 5
>>> b = 10
>>> q , r = divmod(a,b)
>>> q
0
>>> r
5
>>> a = -a
>>> a
-5
>>> q , r = divmod(a,b)
>>> q
-1
>>> r
5
>>> b*q + r    # division algorithm
-5
>>> -5 == a
True
>>>




From fuf at mageo.cz  Wed Jan 28 15:08:00 2004
From: fuf at mageo.cz (Michs Vitecek)
Date: Wed, 28 Jan 2004 21:08 +0100
Subject: isinstance() bug
Message-ID: <E1AmFB0-0004sv-El@mail.python.org>

On Wed, 28 Jan 2004 11:32:19 -0600 Skip Montanaro <skip at pobox.com> wrote:
>You need to compare inode numbers to see if you have the same or different
>files. 
>
>    >>> import stat
>    >>> os.stat(a.__file__)[stat.ST_INO]
>    37041L
>    >>> os.stat(b.__file__)[stat.ST_INO]
>    37041L
>

this could also be used to verify whether the imported module, class etc. 
comes from the same file without messing with the absolute path and 
problems related to it. really a good idea, Skip.
--
	fuf
		fuf at mageo.cz




From __peter__ at web.de  Tue Jan  6 15:44:27 2004
From: __peter__ at web.de (Peter Otten)
Date: Tue, 06 Jan 2004 21:44:27 +0100
Subject: Iterating over a binary file
References: <btf5j8$6g26f$1@ID-46268.news.uni-berlin.de>
Message-ID: <btf6fh$jv5$03$1@news.t-online.com>

Derek wrote:

> Pardon the newbie question, but how can I iterate over blocks of data
> from a binary file (i.e., I can't just iterate over lines, because
> there may be no end-of-line delimiters at all).  Essentially I want to
> to this:
> 
> f = file(filename, 'rb')
> data = f.read(1024)
> while len(data) > 0:
>     someobj.update(data)
>     data = f.read(1024)
> f.close()
> 
> The above code works, but I don't like making two read() calls.  Any
> way to avoid it, or a more elegant syntax?  Thanks.

You can tuck away the ugliness in a generator:

def blocks(infile, size=1024):
    while True:
        block = infile.read(size)
        if len(block) == 0:
            break
        yield block

#use it:
for data in blocks(f):
    someobj.update(data)

Peter






From peter at engcorp.com  Tue Jan 13 10:57:42 2004
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 13 Jan 2004 10:57:42 -0500
Subject: C++ bad-mouthing (was: Why learn Python ??)
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<7xisjh1e3i.fsf@ruckus.brouhaha.com>
	<10064loqc7sd7e3@corp.supernews.com>
	<7xeku496wx.fsf@ruckus.brouhaha.com>
	<donn-9D2291.16343412012004@nntp6.u.washington.edu>
Message-ID: <40041576.D070723E@engcorp.com>

Donn Cave wrote:
> 
> Python has the advantage of a clean start, but
> from a software engineering standpoint it really seems like a
> hacker language.  

Ohh.... nice controversial statement. :-)

I would strongly disagree with the above statement for a number
of reasons, including (random thoughts):

 - packages
 - interactive interpreter
 - no static typing
 - high productivity
 - ease of testing
 - flexibility
 - extremely broad library support
 - low learning curve

and probably a dozen others.  I think this has all been discussed before,
though, so I won't belabour the point.  Basically, as a software engineer
(nominally a "Systems Design Engineer") I find Python to be hands down 
*the* best language I've encountered for use in serious work.  I can't
actually think of another which excels on so many fronts.

-Peter


From fnord at u.washington.edu  Fri Jan  2 14:14:25 2004
From: fnord at u.washington.edu (Lonnie Princehouse)
Date: 2 Jan 2004 11:14:25 -0800
Subject: Abstract Syntax Tree conundrum
Message-ID: <f70e3538.0401021114.1f57622e@posting.google.com>

Hello,

It looks like the compiler and parser modules both implement Python
ASTs.  Is one of these preferred over the other, or do they play
different roles?  What I'm trying to do is this-

(1) Inspect a block of python source
(2) Execute selected statements from the source

The compiler's AST implementation seems better for (1), but I can't
for the life of me figure out how to compile it into a code object,
and there's not even an apparent way to convert it back into source (I
suppose I could write a function to do this, but it seems like there
should be a better way).
On the other hand, the parser's AST implementation can easily be
executed, but for inspection it's not so good--- there's the extra
hassle of translating all of the numeric symbols.

Decompyle might be useful, but it's tricky to use third party modules
at work...

Any suggestions are heartily appreciated =)  And Happy New Year.

-ljp




For reference,

compiler AST:
-------------
Module(None, Stmt([Function('function1', ['x', 'y', 'z'],
[Const(3.0)], 0, None,Stmt([Return(Mul((Mul((Name('x'), Name('y'])),
Function('sumall', ['args'], [], 4, None,
Stmt([Return(CallFunc(Name('reduce'), [Lambda(['a', 'b'], [], 0,
Add((Name('', Name('args')], None, None))]))]))

parser.st AST of the same code:
-------------------------------
[257, [264, [285, [259, [1, 'def'], [1, 'function1'], [260, [7, '('],
[261,[262, [1, 'x']], [12, ','], [262, [1, 'y']], [12, 'z']], [22,
'='], [292, [293, [294, [295, [297, [298, [299, [300, [301, [302,
[303, [304, [305, [2, '3.0']]]]]]]]]]]]]]],':'], [291, [4, ''], [5,
''], [264, [265, [266, [272, [275, [1, 'return'], [313, [292, [293,
[294, [295, [297, [298, [299, [ [303, [304, [305, [1, 'x']]]], [16,
'*'], [303, [304, [305, [1, 'y']]]], [16, '*'], [303, [304, [305, [1,
'z']]]]]]]]]]]]]] [6, '']]]]], [264, [285, [259, [1, 'def'], [1,
'sumall'], [260, [7, '('], [261, [16, '*'], [1, 'args']], [8, ')']],
[11, ':], [5, ''], [264, [265, [266, [272, [275, [1, 'return'], [313,
[292, [293, [294, [295, [297, [298, [299, [300, [301, [302, [ [1,
'reduce']], [308, [7, '('], [317, [318, [292, [307, [1, 'lambda'],
[261, [262, [1, 'a']], [12, ','], [262, [1, 'b']]], [293, [294, [295,
[297, [298, [299, [300, [301, [302, [303, [304, [305, [1, 'a']]]]],
[14, '+'], [302, [303, [304, [305, [1]]]]]], [12, ','], [318, [292,
[293, [294, [295, [297, [298, [299, [300, [301, [302, [303, [304,
[305, [1, 'args']]]]]]]]]]]]]]]]]]]]]]]]]]], [4, '']]], [6, '']]]]],
[4, ''], [0, '']]


From jmob at nospam__unm.edu  Thu Jan 15 19:55:52 2004
From: jmob at nospam__unm.edu (Jason Mobarak)
Date: Thu, 15 Jan 2004 17:55:52 -0700
Subject: Redefining __call__ in an instance
In-Reply-To: <73b00f0c.0401151529.676347b6@posting.google.com>
References: <73b00f0c.0401151529.676347b6@posting.google.com>
Message-ID: <x7KdnVMXjpAPq5rdRVn-sw@comcast.com>

def firstFunc (s, word='up'):
   print "foo"

class callNoWork(object):
   def __new__ (cls):
     cls.__call__ = firstFunc
     return object.__new__(cls)

callNoWork()()

# Dunno if you've read this, but it explains this:
# http://python.org/2.2.1/descrintro.html

Robert Ferrell wrote:
> I have a question about assigning __call__ to an instance to make that
> instance callable.  I know there has been quite a bit of discussion
> about this, and I've read all I can find, but I'm still confused.
> 
> I'd like to have a factory class that takes a string argument and returns
> the appropriate factory method based on that string.  I'd like the
> instances to be callable.  Like this:
> 
> fact = Factory('SomeThing')
> aSomeThing = fact(some args)
> 
> anotherFact = Factory('SomeThingElse')
> anotherThing = anotherFact(some other args)
> 
> The way I thought to do this was to assign the __call__ attribute of
> the fact instance to the appropriate factory method in __init__.  That does not
> work, as many others have pointed out.  I know there are workarounds.
> The appended code shows the variants I know of.  I can use one of
> them, but they are not quite what I am looking for.  
> 
> Have I missed the key message that explains how to make new-style
> classes callable, with the called method unique to each instance?
> 
> thanks,
> -robert
> 
> """Test use of __call__ in a (new style) class.
>    The classes below show various ways of making instances
>    of a class callable.  The goal is to make an instance callable,
>    with the called method defined distincly for each instance.
> """
> 
> 
> def firstFunc(word = 'up'):
>   """This is the method to call, when an instance is invoked."""
>   print "This is firstFunc, word %s." % word
>   return
> 
> class callWorks(object):
>   """This works, since the called method is defined in the class."""
>   def __init__(self):
>     pass
>   def __call__(self, word = 'up'):
>     print 'This is inside callWorks, word %s.' % word
>     return
> 
> class callNoWork(object):
>   """This doesn't work, since __call__ is defined for the method,
>      not the class."""
>   def __init__(self):
>     # This does not make an instance of callNoWork callable
>     self.__call__ = firstFunc
>     
> class callWorksNoFun(object):
>   """This works, but since the class's method is being called, the
>      default arguments are defined by the class, and do not
>      properly reflect the default arguments of the method that
>      wants to be called."""
>   def __init__(self):
>     self._callFunc = firstFunc
>   def __call__(self, word = None):
>     # Although an instance of callWorksNoFun is callable,
>     # the default arguments are wrong
>     self._callFunc(word)
>     return
> 
> class addCallAttribute(object):
>   """Add the attribute 'callMe', which is the callable function.
>      This works fine, but requires the user to invoke this as
>      instance.callMe(), rather than just instance()."""
>   def __init__(self):
>     self.callMe = firstFunc
>     
> # Simplest thing
> cw = callWorks()
> cw()
> 
> # Natural thing to try, but doesn't work
> cnw = callNoWork()
> # The instance, cnw, is not callable.
> try:
>   cnw()
> except Exception, exception:
>   print 'Call did not work, gave exception: %s.' % exception
> 
> # Works, but actually invoking class method, not instance's method
> cwNF = callWorksNoFun()
> # The instance cwNF is callable, but the default value for the callable is wrong.
> # This works fine
> cwNF('No up')
> # This should default to print 'Up', but instead it defaults to None.
> cwNF()
> 
> # Fine, but requires user to invoke instance.callMe(), rather than just instance().
> aCA = addCallAttribute()
> # To call the instance, use the callMe attribute.  That respects defaults fine.
> aCA.callMe()

-- 
(------------------------------(
  )~~~~~ Jason A. Mobarak ~~~~~~~)
(~~ aether_at_gentoo_dot_org ~~(
  )~~~~ jmob_at_unm_dot_edu ~~~~~)
(------------------------------(


From Mike at DeleteThis.Geary.com  Wed Jan  7 04:01:46 2004
From: Mike at DeleteThis.Geary.com (Michael Geary)
Date: Wed, 7 Jan 2004 01:01:46 -0800
Subject: Syntax highlighting in .NET IDE
References: <4iPKb.764$K_3.702@newssvr29.news.prodigy.com>
Message-ID: <vvninrtm2fkaa2@corp.supernews.com>

Moosebumps wrote:
> Is there a way to have the .NET IDE do syntax highlighting for
> python?  I haven't looked into it that much, but perhaps there
> is some config file one can download.
>
> Don't ask why, I know there are better editors, but I have
> special circumstances.  : )

Visual Python integrates full Python support into VS.NET. It's not cheap but
it's very good:

http://www.activestate.com/Products/Visual_Python/

There is also Komodo, which runs separately from VS.NET but feels so much
like VS.NET that it's hard to tell the difference:

http://www.activestate.com/Products/Komodo/?_x=1

-Mike




From moskow23 at yahoo.com  Sun Jan 18 14:16:31 2004
From: moskow23 at yahoo.com (Dan)
Date: 18 Jan 2004 11:16:31 -0800
Subject: Determining a replacement dictionary from scratch
Message-ID: <4b805376.0401181116.3b0adb41@posting.google.com>

Hello,

I'd like to be able to take a formatted string and determine the
replacement dictionary necessary to do string interpolation with it. 
For example:

>>> str = 'his name was %(name)s and i saw him %(years)s ago.'
>>> createdict( str )
{'name':'', 'years':''}
>>>

Notice how it would automatically fill in default values based on
type.  I figure since python does this automatically maybe there is a
clever way to solve the problem.  Otherwise I will just have to parse
the string myself.  Any clever solutions to this?

Thanks 
-dan


From jcb at iteris.com  Sat Jan  3 17:06:58 2004
From: jcb at iteris.com (MetalOne)
Date: 3 Jan 2004 14:06:58 -0800
Subject: NEWBIE: map | zip | list comp
References: <odv9vvgb4aobq4c617k0ju4plat2d81j0o@4ax.com>
Message-ID: <92c59a2c.0401031406.3bd93364@posting.google.com>

The following produces the same result but in a 2 dimensional list. 
However, it is darn near impossible to read.

print map(lambda x: 
    map(lambda (c1,c2): 
    map(lambda ix: (c1*length)[:ix]+c2+(c1*length)[ix:-1], range(length)),
    filter(lambda (c,d): c!=d, map(lambda y: (x,y), base_seq))), base_seq)


for base_seq = "ABCD"
The (x,y) pairs produced are
(A,A), (A,B), (A,C), (A,D),
(B,A), (B,B), (B,C), (B,D), ...

The filter removes the duplicate pairs (A,A),(B,B),(C,C),(D,D)

for (c1,c2) in [(A,B), (A,C), (A,D)] the rotation function gets applied.


From p.magwene at snet.net  Thu Jan 22 07:48:27 2004
From: p.magwene at snet.net (netnews.upenn.edu)
Date: Thu, 22 Jan 2004 07:48:27 -0500
Subject: prog/lib to draw graphs
In-Reply-To: <buofpq$1ra$06$1@news.t-online.com>
References: <buofpq$1ra$06$1@news.t-online.com>
Message-ID: <buogqm$chaf$1@netnews.upenn.edu>

Florian Lindner wrote:
> Hello,
> I'm looking for a program or python library to draw graphs.
> They should look like the that:
> 
> 
> /--------\                         /--------\
> | Node A | ------ belongs to ----> | Node B |
> \--------/                         \--------/
> 
> Which is a result of the function call like that:
> 
> connectNodes(firstNode, secondNode, description, lineStyle)
> connectNodes("Node A", "Node B", "belongs to", dashed)
> 
> It should have a open scalable vector format as output (DVI, SVG, PDF, ...)
> and should be able to make automatic optimal placement of the items.
> Do you know something like that?
> Thx,
> Florian

Try graphviz:

   http://www.research.att.com/sw/tools/graphviz/


I think there's a python interface to graphviz floating around (Google 
it), but it's  trivial to write a Python routine that spits out valid 
Graphviz "dot" files.

In the case of your example, the contents of the dot file would be 
something like:

digraph G{
     "Node A" -> "Node B" [label="belongs to"];
}


--Paul


From amk at amk.ca  Sat Jan 31 22:46:59 2004
From: amk at amk.ca (A.M. Kuchling)
Date: Sat, 31 Jan 2004 21:46:59 -0600
Subject: OT: why do web BBS's and blogs get so slow?
References: <7xbrojk9rk.fsf_-_@ruckus.brouhaha.com>
Message-ID: <KeGdnYNFW94u64Hd4p2dnA@speakeasy.net>

On 31 Jan 2004 14:56:15 -0800, 
	Paul Rubin <> wrote:
> an ISP on a fast computer with plenty of net bandwidth.  I'm wondering
> what those programs are doing, that makes them bog down so badly.
> Anyone know what the main bottlenecks are?  I'm just imagining them
> doing a bunch of really dumb things.

Oh, interesting!  I'm sporadically working on a Slashdot clone, so this sort
of thing is a concern.  As a result I've poked around in the Slashdot SQL
schema and page design a bit.

Skipping ahead:
> Am I being naive and/or
> missing something important?  Slashdot itself uses a tremendous amount
> of hardware by comparison.

Additional points I can think of:

* Some of that slowness may be latency on the client side, not the server. A
  heavily table-based layout may require that the client get most or all of
  the HTML before rendering it.  Slashdot's HTML is a nightmare of tables;
  some weblogs have CSS-based designs that are much lighter-weight.

* To build the top page, Slashdot requires a lot of SQL queries.  There's
  the list of stories itself, but there are also lists of subsections (Apache,
  Apple, ...), lists of stories in some subsections (YRO, Book reviews, older
  stories), icons for the recent stories, etc. All of these may need an SQL
  query, or at least a lookup in some kind of cache.
  
  It also displays counts of posts to each story (206 of 319 comments),
  but I don't think it's doing queries for these numbers; instead there 
  are extra columns in various SQL tables that cache this information 
  and get updated somewhere else.  

* I suspect the complicated moderation features chew up a lot of time.  You
  take +1 or -1 votes from people, and then have to look up information
  about the person, and then look at how people assess this person's 
  moderation...  It's not doing this on every hit, though, but this feature
  probably has *some* cost.  

* There are lots of anti-abuse features, because Slashdot takes a lot 
  of punishment from bozos.  Perhaps the daily traffic is 10,000
  that get displayed plus another 10,000 messages that need to be filtered
  out but consume database space nonetheless.

* Slashcode actually implements a pretty generic web application system that
  runs various templates and stitches together the output.  A Slashcode
  "theme" consists of the templates, DB queries, and cron jobs that make up
  a site; you could write a Slashcode theme that was amazon.com or any other
  web application, in theory.  However, only one theme has ever been
  written, AFAICT: the one used to run Slashdot. (Some people have taken
  this theme and tweaked it in small stylistic ways, but that's a matter of
  editing this one theme, not creating a whole new one.)  This adds an
  extra level of interpretation because the site is running these templates
  all the time.
  
> 3) The message store would be two files, one for metadata and one for
> message text.  Both of these would be mmap'd into memory.  There would
> be a fixed length of metadata for each message, so getting the
> metadata for message #N would be a single array lookup.  The metadata

I like this approach, though I think you'd need more files of metadata, e.g.
the discussion of story #X starts with message #Y.  

(Note that this is basically how Metakit works: it mmaps a region of memory
and copies data around, provided a table-like API and letting you add and
remove columns easily.  It might be easier to use Metakit than to reinvent a
similar system from scratch.  Anyone know if this is also how SQLite works?)

Maybe threading would be a problem with fixed-length metadata records.  It
would be fixed-length if you store a pointer in each message to its parent,
but to display a message thread you really want to chase pointers in the
opposite directory, from message to children. But a message can have an
arbitrary number of children, so you can't store such pointers and have
fixed-length records any more.

In my project discussions haven't been implemented yet, so I have no 
figures to present.

--amk


From paul at pfdubois.com  Mon Jan 19 23:59:10 2004
From: paul at pfdubois.com (Paul Dubois)
Date: Mon, 19 Jan 2004 20:59:10 -0800
Subject: [Numpy-discussion] Status of Numeric
In-Reply-To: <CEELJPECNGEGKFNDLHFFGEBKCCAA.perry@stsci.edu>
References: <CEELJPECNGEGKFNDLHFFGEBKCCAA.perry@stsci.edu>
Message-ID: <400CB59E.3050307@pfdubois.com>

Having two array classes around is a terrible idea. Once you have two 
popular array classes the entire world bifurcates. This plot package 
accepts those and that FFT accepts these, ad nauseum.

I only suggested we do numarray because Numeric was, by general 
agreement, unmaintainable.  It was hard to work on and lacked the kind 
of robustness necessary to get permission to put it in the core. We all 
agreed Numeric would cease. Let's stick to the plan.

If there is enough spare energy in the system for SciPy to be talking 
about doing a NEW array class, surely there is enough energy to make a 
real try at getting everyone over to numarray and having it suffice. 
This means the whole community has to contribute, not just sit back and 
ask for things. This is OPEN source, right?

I apologize for my lack of participation lately but I'm on a project 
that doesn't use Numeric and is several people short. And one of the 
people had a short person.

I'll be at PyCon, BTW.




From try_vanevery_at_mycompanyname at yahoo.com  Tue Jan 13 21:38:51 2004
From: try_vanevery_at_mycompanyname at yahoo.com (Brandon J. Van Every)
Date: Tue, 13 Jan 2004 18:38:51 -0800
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
	<40047290$1@news.012.net.il>
Message-ID: <bu29ea$ct54l$1@ID-207230.news.uni-berlin.de>


"G.I.L" <not at all.com> wrote in message news:40047290$1 at news.012.net.il...
>
> Brandon, why the fuck on Earth couldn't you spend that exact amount of
time
> doing what you did BEFORE posting and arguing with the entire newsgroup?

Hey GIL, you're here wasting time of your own free will.  Don't look to me
to be the purveyor of your quality discourse.  To me this is just hours
between implementing stuff.

Although actually, there's another agenda.  I know *someone* out there is
going through the same shit I have / I am.  The posts are for their benefit,
to give them warnings / inklings.

> It
> was an unbelievable waste of time, since you've managed to convice (maybe
> still wrongfully) all the people that you are completely clueless.

Why, because I turned around a project in 3 weeks while having the flu half
the time?

I laugh, over and over again, at all the people who declare 3D spherical
icosahedral planetary display engines to be trivial, or VS .NET 2003 ports
of Freeciv to be trivial, or any other project I've sunk blood into and run
into difficulties.  I know better.  It's water off my back because I know
what an armchair peanut gallery sounds like.

You try to do something big, you put your money on the line to do it, you
fail or don't entirely succeed, you give postmortem, you lay all your cards
out for others to examine... *then* I will worry about your opinion.

> I see your point in many of the issues you raised. But the only reason I
> don't compare myself to you, is that I have a shitload of games to prove
my
> point. I've never had a major failure, so I never needed to use one to
> leverage my projects. All the things I learned from, were simply bad
habits,
> mostly coding habits. I constantly evolve, in small steps, from one
success
> to another. That's how it should be. You do the math.

Those who never taste failure are haughty.

-- 
Cheers,                     www.indiegamedesign.com
Brandon Van Every           Seattle, WA

"The pioneer is the one with the arrows in his back."
                          - anonymous entrepreneur



From ods at strana.ru  Fri Jan 23 05:43:14 2004
From: ods at strana.ru (Denis S. Otkidach)
Date: Fri, 23 Jan 2004 13:43:14 +0300 (MSK)
Subject: [ANN] ip2cc 0.2 released
Message-ID: <Pine.LNX.4.44L.0401231336360.3685-100000@ods.pravda.rfn.ru>


		  ip2cc: Lookup country country by IP address
                  ===========================================

WHAT IS IT

If you want to gather web statistics by countries (not by top-level
domains) or implement targeting, here is solution: ip2cc.  This module
allows to resolve country from IP address.

USAGE

ip2cc.py -update              - build/update database
ip2cc.py <address>            - print country name for which
                                <address> is registered
For example:
$ ./ip2cc.py python.org
python.org (194.109.137.226) is located in NETHERLANDS
$ ./ip2cc.py google.com.ru
google.com.ru (216.239.33.100) is located in UNITED STATES

Module can be used as CGI.

WHERE TO GET

Homepage: http://ppa.sf.net/#ip2cc
Download: http://prdownloads.sf.net/ppa/ip2cc-0.2.tar.gz?download

LICENSE

Python-style

ACKNOWLEDGEMENTS

Jason R. Mastaler
Fredrik Lundh

CHANGES

0.2	- Adopted to new format of registrars.
	- Added LACNIC to sources.
	- Fixed contry code map and added -check option to simplify
	  maintainance.

0.1	Initial release


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




From http  Sat Jan 10 13:39:08 2004
From: http (Paul Rubin)
Date: 10 Jan 2004 10:39:08 -0800
Subject: solving a small programm
References: <40004254$0$16669$ba620e4c@news.skynet.be>
Message-ID: <7xfzen3ayb.fsf@ruckus.brouhaha.com>

That sounds like a homework problem, so rather than write the code for
you, here's a hint -- use another variable, and update it every time 
you decide how many coins of any specific size you'll use.


From http  Mon Jan 12 04:49:51 2004
From: http (Paul Rubin)
Date: 12 Jan 2004 01:49:51 -0800
Subject: Division oddity
References: <ssn3009029rrug3l8dk1pn06tqd019ucld@4ax.com>
	<7xeku5vrn8.fsf@ruckus.brouhaha.com>
	<My1CLVAiZmAAFw5r@jessikat.fsnet.co.uk>
Message-ID: <7xbrp9h4xs.fsf@ruckus.brouhaha.com>

Robin Becker <robin at jessikat.fsnet.co.uk> writes:
> Python 2.3.2 (#49, Oct  2 2003, 20:02:00) [MSC v.1200 32 bit (Intel)] on
> win32
> Type "help", "copyright", "credits" or "license" for more information.
> >>> from __future__ import division
> >>> eval('1/2')
> 0.5
> >>>
> 
> so  I guess pythonwin is broken in this respect.

Huh?  you get the expected result with both python and pythonwin.  Neither
one is broken.  The surprising result is from input(), not eval():

    $ python
    Python 2.2.2 (#1, Feb 24 2003, 19:13:11) 
    [GCC 3.2.2 20030222 (Red Hat Linux 3.2.2-4)] on linux2
    Type "help", "copyright", "credits" or "license" for more information.
    >>> from __future__ import division
    >>> print input('expression: ')
    expression: 1/2
    0
    >>> print eval('1/2')
    0.5
    >>> 

That's because input evaluates its string in the context of a
different module which was compiled with old-style division.  I don't
know of other functions that use eval like that, and input() should
be deprecated or eliminated anyway, so this isn't a big deal.


From peter at engcorp.com  Mon Jan 19 09:38:01 2004
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 19 Jan 2004 09:38:01 -0500
Subject: Python Text Adventure Authoring System
References: <bufcp0$h36fj$1@ID-221199.news.uni-berlin.de>
	<mailman.489.1074478463.12720.python-list@python.org>
Message-ID: <400BEBC9.8549D0DD@engcorp.com>

Jp Calderone wrote:
> 
>   There are a few modules in Twisted's CVS repository that are handy in this
> area (as a few people are aware, Twisted is actually a support framework for
> multiplayer interactive fiction or text adventure games).  

Just to clarify, though I know Jp knows this very well :-), Twisted is *much more*
than just a support framework for multiplayer interactive fiction, although
it had its origins in that area and is still being developed for it.

-Peter


From lubowiecka at go2.pl  Wed Jan  7 07:17:54 2004
From: lubowiecka at go2.pl (Sylwia)
Date: 7 Jan 2004 04:17:54 -0800
Subject: 'Interrupted function call' in time.sleep(1000) after relogging
Message-ID: <f6554b84.0401070417.4201896b@posting.google.com>

Hi!

I have implemented a Python services. It behaves as a supervisor for
log files.
If the space used by log files is bigger than a given upper limit,
then it starts to delete log files until the space is less than a
given lower limit. It checks the space every 1000 secs. After that it
falls asleep. It is configured to start up automatically on system
boot. Everything works ok except one thing ... :( The service should
run even when I log off, so I made an experiment. It turned out that
after relogging (I have to press Ctrl+Ald+Del) the following exception
was raised:

The instance's SvcRun() method failed 
  File "C:\Python23\lib\site-packages\win32\lib\win32serviceutil.py",
line 663, in SvcRun
    self.SvcDoRun()
  File "C:\SEE\modules\adminapps\purgeLogFilesService.py", line 158,
in SvcDoRun
    time.sleep(1000) 
exceptions.IOError: (4, 'Interrupted function call')

Here is the part of my code (inside SvcDoRun) that generates the
error:

            #check if the service is going to be stopped
            timeout=5
            waitHandles = self.hWaitStop, 
            stp = win32event.WaitForMultipleObjects(waitHandles, 0,
timeout)
            if stp == win32event.WAIT_OBJECT_0:
                #print "Received Quit from Win32"
                break
            else:
                time.sleep(1000) # <--- Exception generated here!!!

How can I solve it? Maybe I should try to patch a new timemodule.c
file? I have no idea :( I would be greatful for any hints.
I use Windows XP operating system.

Best wishes,

Sylwia


From nuffsaid at phreaker.net  Sat Jan 31 16:50:52 2004
From: nuffsaid at phreaker.net (Nuff Said)
Date: Sat, 31 Jan 2004 22:50:52 +0100
Subject: Running External Programs from Within Python
References: <5a40bf6a.0401311123.4b7f783f@posting.google.com>
Message-ID: <pan.2004.01.31.21.50.51.733357@phreaker.net>

On Sat, 31 Jan 2004 11:23:42 -0800, Bob=Moore wrote:

>  
> Can I run (call? exec? eval?) an external program from inside a Python
> program?
> 

Check out os.popen (in all it's variants); e.g. something like
the following will do what you want:

  import os

  stdin, stdout, stderr = os.popen3('your program goes here')
  output = stdout.read()
  errors = stderr.read()
  stdin.close(); stdout.close(); stderr.close()

  ... do something with 'output' and 'errors' ...

HTH / Nuff



From wweston at att.net  Fri Jan 30 09:28:17 2004
From: wweston at att.net (wes weston)
Date: Fri, 30 Jan 2004 14:28:17 GMT
Subject: conditional expression sought
In-Reply-To: <6PjSb.138487$6y6.2697536@bgtnsc05-news.ops.worldnet.att.net>
References: <pRbSb.330334$ts4.37644@pd7tw3no>
	<mailman.1000.1075402284.12720.python-list@python.org>
	<P6iSb.334480$ts4.82507@pd7tw3no>
	<6PjSb.138487$6y6.2697536@bgtnsc05-news.ops.worldnet.att.net>
Message-ID: <5StSb.35726$6O4.994965@bgtnsc04-news.ops.worldnet.att.net>

oops;

The code:

A.append(bool(randint(0,1)))

will always yield an A of [true,true,true]


WRONG; was thinking it was a rand float;.


Thanks for replying to all who tried to help.

wes



wes weston wrote:
> Elaine,
>    The last code line:
> 
> print "I would have liked this to be B[2] = ",B[2]
> 
> prints the value of B[2]; the value you don't want.
> I think what you meant was that you want B[2] to be
> 0.0 not false. bool(0.0) does equal false.
> ---------------------------------------------------
> The code:
> 
> A.append(bool(randint(0,1)))
> 
> will always yield an A of [true,true,true]
> ---------------------------------------------------
> I didn't know this about python, and I'm not sure I
> like it:
> 
> wes at linux:~/amy> python
> 
>  >>> print 1.1 and 2.2
> 2.2
>  >>> print 2.2 and 1.1
> 1.1
>  >>> print (1.1 and 2.2)
> 2.2
> 
> The order is important. To me, it should be printing true
> and not either number or the last number.
> 



From claird at lairds.com  Sat Jan  3 13:01:10 2004
From: claird at lairds.com (Cameron Laird)
Date: Sat, 03 Jan 2004 18:01:10 -0000
Subject: Python for Embedded Devices?
References: <efa6f675.0401021920.3bffced0@posting.google.com>
	<425cc8d1.0401030826.59a9d4ca@posting.google.com>
Message-ID: <vve0r6hktmptc3@corp.supernews.com>

In article <425cc8d1.0401030826.59a9d4ca at posting.google.com>,
mir nazim <mir4uu at yahoo.com> wrote:
			.
			.
			.
>It should possible to create complete J2EE like platform for python
>for creating complex applications. [ i m no expert. lokking for a
>simple discussion.]

This thread interests me, if only because you and the original 
poster have such different perspectives from mine.  I'm confi-
dent that Python can support something like J2EE in a technical
sense, and also that J2EE is an important part of Java--but is
it a *good* part?  I'm sincerely unconvinced that there's much
there Python *should* emulate (apart from what Python already
has).  J2EE's certainly a marketing success; I don't know what
it teaches us about how to rationalize application development,
though.

I'm even more certain that there's no model in prospect for
organizing the current Python development team to create such
a framework.

Briefly, I see J2EE, like .NET, as aimed at the commodification
of application development.  It's aimed at "Enterprise" teams
of mediocre, alienated coders.  I have no enthusiasm for Python
competing with that approach.
-- 

Cameron Laird <claird at phaseit.net>
Business:  http://www.Phaseit.net


From james.kew at btinternet.com  Fri Jan 30 16:38:25 2004
From: james.kew at btinternet.com (James Kew)
Date: Fri, 30 Jan 2004 21:38:25 -0000
Subject: Confused about a list.sort()
References: <S6FRb.2098$P17.1139@fed1read03>
	<xsQRb.28535$6O4.748063@bgtnsc04-news.ops.worldnet.att.net>
Message-ID: <bveiqs$rps0r$1@ID-71831.news.uni-berlin.de>

"wes weston" <wweston at att.net> wrote in message
news:xsQRb.28535$6O4.748063 at bgtnsc04-news.ops.worldnet.att.net...
>  Switch from windoze to linux and provide screen dumps.
>
> wes at linux:~> python
> Python 2.3.3c1 (#3, Dec 26 2003, 16:36:50)

Ah, that's nice: a simple question about list.sort()'s behaviour answered
with a dose of Linux advocacy. Everyone else managed to answer the question
at hand.

FWIW, Python works very nicely at the Windows command-line too, "screen
dumps" and all:

C:\>python
ActivePython 2.3.2 Build 232 (ActiveState Corp.) based on
Python 2.3.2 (#49, Nov 13 2003, 10:34:54) [MSC v.1200 32 bit (Intel)] on
win32
Type "help", "copyright", "credits" or "license" for more information.
>>>

although I have to admit I usually prefer PythonWin's interactive window.

ISTR discussion on python-dev about adding a sorted() method to list,
returning a sorted copy of the list -- did that ever reach a conclusion?

James






From even at pondie.com  Wed Jan 14 20:50:04 2004
From: even at pondie.com (Ben Floyd)
Date: 14 Jan 2004 17:50:04 -0800
Subject: baffling os.system behavior - differs from command line
Message-ID: <604fc0ca.0401141750.4dc57782@posting.google.com>

It goes like this:
Im converting a perl script that executes a command on each result of
a directory listing. In perl, all is well. In Python, using
approximately
the same logic creates a seemingly random problem I can't pin down.
I hesitated to ask this question since it's so Slackware
Linux-centric,
and im new to Python. It's hard to ask in a generic way, but im out of
options...

The command is Slackware's package creation utility, makepkg. It uses
the
current working directory as package source and takes a filename as an
argument to output the newly created package to. Makepkg is
essentially
a tarball creator, wrapped in a nice command. Simple stuff. Here is my
code:

I have a for loop that reads a file list, like so:
        pkg_srcdir = '/packages_source'
        pkg_dir = '/packages_tgzs'
        ls = os.listdir(pkg_srcdir)

                for name in ls:
                        build_src = pkg_srcdir + '/' + name
                        new_filename = pkg_dir + '/' + name + '.tgz'

                        # Valid directory?
                        if not os.path.isdir(build_src):
                                sys.exit("\nInvalid directory \'" +
pkg_srcdir + "\'\n")

                        # Go into the new directory
                        try:    os.chdir(build_src)
                        except  os.error, value:
                                sys.exit("\nInvalid directory: \'" +
build_src + "\': " + value[1])

                        # I then execute the command on each result,
like so:
                        # new_filename is correctly assembled, which i
can verify
                        # from printing it out on each loop iteration
                        os.system('/sbin/makepkg --chown n --linkadd y
' + new_filename)

When all is done running, which take a good 7 minutes, I get varied
results.
It looks like its working... pauses, has lots of disk activity on the
drive
(verified with ps and vmstat), but in the end only a couple of
packages are
created. I can actually watch the output of makepkg and see it
creating the
tarballs. Here is the truly whacky part: Changing pkg_dir to anything
else,
say /tmp/beavis, will create the packages correctly for a while, then
mysteriously stop with no warning or change to the script - just run
it a
few times and it stops working.

Im running as root, so its not a permission problem - its far to
erratic
anyway.

I dont think this problem has anything to do with os.system, per say,
since it also happens with os.popen.

I thought it might be a buffering problem, so i tried using Python's
-u
switch and flushing stdout with sys.stdout.flush() - no go.

I tried sleeping for long periods of time in each loop iteration - no
go.

I tried writing each individual makepkg command out to a file and
running it with perl, doing all the proper filehandling. I also
tried bash for kicks - no go

In the end, I put an ampersand at the end of the makepkg command, like
so:
        os.system('/sbin/makepkg --chown n --linkadd y ' +
new_filename + ' &')

This sort of works: it creates 95% of the packages most of the time -
results varies. It always seems to leave out the same packages.
The packages it misses are in the middle of the list, so its not
just skipping the first or the last few.

Im baffled.

Any ideas?


From fuf at mageo.cz  Wed Jan 28 08:22:25 2004
From: fuf at mageo.cz (Michal Vitecek)
Date: Wed, 28 Jan 2004 14:22:25 +0100
Subject: isinstance() bug
Message-ID: <20040128132225.GA10842@foof.i3.cz>

 hello,

 please consider the following situation:

 under the current directory there's a subdirectory 'package' with two
 files: __init__.py and module.py

    ./package:
        __init__.py
        module.py

 module.py contains:
 
 class A(object):
    pass

 aModule = A()


 now, let's do:

 current directory:

    >>> import package.module
    >>> type(package.module.aModule)
    <class 'package.module.A'>
    >>> isinstance(package.module.aModule, package.module.A) # so far good
    1
    >>> a = package.module.A()
    >>> isinstance(a, package.module.A) # so far good
    >>> import sys
    >>> sys.path.append('package')
    >>> import module
    >>> a = module.A()
    >>> isinstance(a, package.module.A) # will return 0 !!!
    0
    >>> isinstance(package.module.aModule, module.A) # will return 0 !!!
    0
    >>>

 how is it possible that it IS important how you imported a class
 definition for isinstance() to work? it's insane!
    
-- 
		fuf		(fuf at mageo.cz)



From nospam at nowhere.hu  Sat Jan 31 15:06:22 2004
From: nospam at nowhere.hu (Miklós)
Date: Sat, 31 Jan 2004 21:06:22 +0100
Subject: Programmers Wanted for Computer Graphics Startup Near
	Philadelphia
References: <2da21d6c.0401310807.671be3b7@posting.google.com>
Message-ID: <bvh1eq$jjr$1@namru.matavnet.hu>

Software patents are evil.
Hell to them.

Mikl?s

"Stan Schwartz" <CGStartup at earthlink.net> wrote in message
news:2da21d6c.0401310807.671be3b7 at posting.google.com...
> My name is Stan Schwartz, and I'm a University of Pennsylvania
> Ph.D. and an independent inventor.  I'm submitting two computer
> graphics patents to the USPTO during the next several weeks.





From deets_noospaam at web.de  Wed Jan 28 12:25:54 2004
From: deets_noospaam at web.de (Diez B. Roggisch)
Date: Wed, 28 Jan 2004 18:25:54 +0100
Subject: Chart drawing library for Python
References: <6ee58e07.0401280403.3d52a9e0@posting.google.com>
	<bv8ipn$2dp$07$1@news.t-online.com>
Message-ID: <bv8rb2$bbq$04$1@news.t-online.com>

Diez B. Roggisch wrote:

> Hi,
> 
>> is there something like "JpGraph" for python ?
>> For those who don't know this PHP library: It is a high level
>> drawing library that generates gif files with all kind of charts.
> 
> there has been a thread about this lately: Many people (including me) use
> graphviz for that. As long as you don't need interactivity, it does a
> really great job.

Oops - got confused by the name JpGraph - AFAIK charts aren't the subject of
graphviz....

Diez


From jensthiede at webgear.co.za  Fri Jan  9 14:07:58 2004
From: jensthiede at webgear.co.za (Jens Thiede)
Date: 9 Jan 2004 11:07:58 -0800
Subject: Variable Scope
Message-ID: <dcde6f.0401091107.45d464eb@posting.google.com>

In the following terminal; could someone inform me as to why it is
posible to print a global variable without having to declare it using
global. This has affected some source of mine, and allows you to
modify a global in a local scope *without* the global keyword, for
instance, you can append to a global list, but *not* assign it a new
value, for then, you create a new local variable. -- Why.

Python 2.3.2 (#1, Jan  3 2004, 23:02:08) 
[GCC 3.2.3 20030422 (Gentoo Linux 1.4 3.2.3-r3, propolice)] on linux2
    
IDLE 1.0      
>>> x = 10;
>>> def test():
	x += 1;


>>> test();

Traceback (most recent call last):
  File "<pyshell#5>", line 1, in -toplevel-
    test();
  File "<pyshell#4>", line 2, in test
    x += 1;
UnboundLocalError: local variable 'x' referenced before assignment
>>> def test2():
	print x;

	
>>> test2();
10

Any help would be appreciated,

Jens Thiede.


From peter at engcorp.com  Mon Jan 12 09:13:54 2004
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 12 Jan 2004 09:13:54 -0500
Subject: QOTW?
References: <ryELb.238$tK2.228@amstwist00> <btn5db$2f8$1@absinth.dialog.net.pl>
	<pan.2004.01.09.21.35.40.132608@yahoo.com>
	<mailman.262.1073742614.12720.python-list@python.org>
	<pan.2004.01.11.07.28.26.422741@yahoo.com>
	<oueku67lsl.fsf@andlx-anamika.cisco.com>
Message-ID: <4002ABA2.D756F129@engcorp.com>

Ganesan R wrote:
> 
> >>>>> "Samuel" == Samuel Walters <swalters_usenet at yahoo.com> writes:
> 
> > I/O is one of our strengths, because we understand that most programs are
> > not algorithmically bound, but rather I/O bound.  I/O is a big
> > bottle-neck, so we should be damn good at it.  The fastest assembly
> > program won't do much good if it's always waiting on the disk-drive.
> 
> Actually, Python is much slower than Perl for I/O. See the thread titled
> "Python IO Performance?" in groups.google.com for a thread started by me on
> this topic. I am a full time C programmer but do write occasional
> Python/Perl for professional/personal use.
> 
> To answer the original question about how much percentage of time I spend
> optimizing my Python programs - probably never. However I did switch back to
> using Perl for my most of my text processing needs. For one program that was
> intended to lookup patterns in a gzipped word list, performance of the
> original python version was horribly slow. Instead of rewriting it in Perl,
> I simply opened a pipe to zgrep and did post processing in python. This
> turned out to be much faster - I don't remember how much faster, but I
> remember waiting for the output from the pure python version while the
> python+zgrep hybrid results were almost instantaneous.

I didn't consider this sort of thing in my poll, but I'd have to say you 
actually *are* optimizing your Python programs, even if you did it by falling 
back on another language...

-Peter


From ramen at lackingtalent.com  Fri Jan  9 01:15:52 2004
From: ramen at lackingtalent.com (Dave Benjamin)
Date: Fri, 09 Jan 2004 06:15:52 -0000
Subject: Python and Jython are kinda different
Message-ID: <slrnbvsi8v.78r.ramen@lackingtalent.com>

Hey good people,

I've been doing a lot of simultaneous Jython and CPython programming lately,
and just wanted to say, with no intended ill will toward any of the
individuals who have been generous enough to make the two languages
possible, that, well, they're kinda different.

I guess it was inevitable, but with Jython stuck at Python 2.1, it's not
really the same language as CPython is today. You still have to type "from
__future__ import nested_scopes", and there are no generators or properties,
and the type/class dichotomy is still in that awkward state, and you have to
inherit from UserList/Dict, and there are no sets, and you have to roll your
own enumerate() and dict(), and files don't close themselves automatically
(yeah, I know, dream on, hehe...), no csv module, no importing from zips...
wow... it's amazing where CPython has come in such a short time. Well, anyway.

I've never tried the 2.2a0 version (of Jython), mostly because the message
on the site about it being somewhere between 2.1 and 2.3 left me a bit
uncomfortable. ;) 

Jython is still a dream to program in compared to Java. So I can't complain.

But it's frozen in a particular state, while CPython is continuing to
aggressivly pursue new ground--like lazy iteration--in ways that change the
Python style; ways that leave me re-implenting not-so-cool versions of the
new style for Jython. In a sense, it's made me really think hard about what
new Python features are really useful, and what are merely new. I definitely
like having the enumerate() function around. And dict(), how could you live
without a complement to dict.items? That should have been in Python -1.0. =)

Is there anyone here that works on Jython? Do you need help? What kind of
help do you need? What's your estimation of the amount of work needed? Is
the work done with PyPy helpful? I'm really curious.

One Love.
One Python.
That sounds dirty.

Dave

-- 
.:[ dave benjamin (ramenboy) -:- www.ramenfest.com -:- www.3dex.com ]:.
: d r i n k i n g   l i f e   o u t   o f   t h e   c o n t a i n e r :


From klapotec at chello.at  Fri Jan 30 13:12:34 2004
From: klapotec at chello.at (Christopher Koppler)
Date: Fri, 30 Jan 2004 18:12:34 GMT
Subject: PEP 327: Decimal Data Type
References: <mailman.1036.1075467073.12720.python-list@python.org>
	<6ltk10h30riel0lghd18t5unjco2g26spi@4ax.com>
Message-ID: <6i7l109qaq1lbv5da6sckp904tq56mmr32@4ax.com>

On Fri, 30 Jan 2004 16:03:55 +0000, Stephen Horne
<steve at ninereeds.fsnet.co.uk> wrote:

[snip]
>
>That said, there are cases where a decimal type would be genuinely
>useful. Given that, my only comment on the PEP is that a decimal
>literal might be a good idea - identical to float literals but with a
>'D' appended, for instance.

Or, maybe if money is being represented, appending a '$'?

*ducks*

Just-couldn't-resist-ly yours,

--
Christopher


From hopper at omnifarious.org  Sun Jan 11 04:06:45 2004
From: hopper at omnifarious.org (Eric Mathew Hopper)
Date: Sun, 11 Jan 2004 01:06:45 -0800
Subject: pydoc patch for Subversion
Message-ID: <20040111090645.GA2398@omnifarious.org>

I have a patch that allows pydoc to deal with Subversion
(http://www.subversion.tigris.org) style version strings.

Subversion does not do '$Revsion: num$' style tags.  The closest it will
get is '$Rev: num$'.  So, I included a check for that type as well.

It's a patch to this version of pydoc.py

__version__ = "$Revision: 1.86.8.1 $"

Thanks,
-- 
"It does me no injury for my neighbor to say there are twenty gods or no God.
It neither picks my pocket nor breaks my leg."  --- Thomas Jefferson
"Go to Heaven for the climate, Hell for the company."  -- Mark Twain
-- Eric Hopper (hopper at omnifarious.org  http://www.omnifarious.org/~hopper) --


-------cut---------
--- /sw/lib/python2.3/pydoc.py  Sat Jan  3 15:43:56 2004
+++ pydoc2.3.py Sun Jan 11 00:56:39 2004
@@ -528,8 +528,11 @@
         info = []
         if hasattr(object, '__version__'):
             version = str(object.__version__)
-            if version[:11] == '$' + 'Revision: ' and version[-1:] == '$':
-                version = strip(version[11:-1])
+            if (version[0] == '$') and (version[-1] == '$'):
+                if version[1:11] == 'Revision: ':
+                   version = strip(version[11:-1])
+                elif version[1:6] == 'Rev: ':
+                   version = strip(version[6:-1])
             info.append('version %s' % self.escape(version))
         if hasattr(object, '__date__'):
             info.append(self.escape(str(object.__date__)))
@@ -1004,8 +1007,11 @@
 
         if hasattr(object, '__version__'):
             version = str(object.__version__)
-            if version[:11] == '$' + 'Revision: ' and version[-1:] == '$':
-                version = strip(version[11:-1])
+            if (version[0] == '$') and (version[-1] == '$'):
+                if version[1:11] == 'Revision: ':
+                   version = strip(version[11:-1])
+                elif version[1:6] == 'Rev: ':
+                   version = strip(version[6:-1])
             result = result + self.section('VERSION', version)
         if hasattr(object, '__date__'):
             result = result + self.section('DATE', str(object.__date__))
-------cut---------
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From dkuhlman at rexx.com  Sat Jan 10 19:30:55 2004
From: dkuhlman at rexx.com (Dave Kuhlman)
Date: Sat, 10 Jan 2004 16:30:55 -0800
Subject: What is best for web application development??
References: <mailman.261.1073735066.12720.python-list@python.org>
Message-ID: <btq5er$a2shs$1@ID-139865.news.uni-berlin.de>

ketulp_baroda wrote:

> i am developing a web application and i am really confused on what
> should i use.
> should i use just python and use the cgi module availabe.
> Or should i use application like WebWare.Also there is PSP
> available. I am really confused and need help

There are a number of Python web frameworks, for example, Quixote,
which is well supported, Zope, which is huge, and Twisted, which
is ingenious, cutting edge, and avant-garde.

See the following for more information:

    http://www.python.org/sigs/web-sig/
    
And, the following provides information that will enable you to
compare your options:

    http://www.python.org/cgi-bin/moinmoin/WebProgramming

You may also want to join the web-sig email list and ask your
question there.

But, no matter what you do, the answer is:  It depends.

Dave

-- 
http://www.rexx.com/~dkuhlman
dkuhlman at rexx.com


From jcarlson at nospam.uci.edu  Mon Jan 26 15:27:57 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Mon, 26 Jan 2004 12:27:57 -0800
Subject: Unique ID for CD or DVD
In-Reply-To: <MOaRb.15998$PD3.2974@newssvr27.news.prodigy.com>
References: <69TQb.15674$Le1.6291@newssvr27.news.prodigy.com>
	<MOaRb.15998$PD3.2974@newssvr27.news.prodigy.com>
Message-ID: <bv3tcd$mb9$2@news.service.uci.edu>

Hoang wrote:

> thanks everyone for your suggestions.  I have decided to use MD5 since it is
> included as a module with Python.  Finding a unique string from the CD won't
> be that hard and makes the approach more straight forward than any other
> method.  Using MD5 makes it less proprietary than it needs to be.
> 
> Hoang Do
> http://jotsite.com

Using md5 on what?  The track lengths, filenames, raw data on the disk?

  - Josiah


From tim.golden at viacom-outdoor.co.uk  Tue Jan 27 03:46:22 2004
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Tue, 27 Jan 2004 08:46:22 -0000
Subject: Py2exe and WMI module
Message-ID: <F1921F85572CB04D9F55B14BDC76B3E4434670@tdi_nt9.internal.viacom-outdoor.co.uk>

>From: Thomas Heller [mailto:theller at python.net]
>
>
>Tim Golden <tim.golden at viacom-outdoor.co.uk> writes:
>
>>>From: nekiv at start.no [mailto:nekiv at start.no]
>>>
>>>I'm having a problem when I try to make a standalone 
>installation of a
>>>Python program using Tim Goldens WMI-module.  The py2exe produce the
>>>exe-file as expected, but it fails to execute.
>>
>> [... snip my long-winded explanation of generating typelib params ...]
>>
>
>I think the 'official' way is to run makepy with the '-i' flag, then it
>prints out this:
>
>c:\>\python23\lib\site-packages\win32com\client\makepy.py -i
>Microsoft WMI Scripting V1.2 Library
> {565783C6-CB41-11D1-8B02-00600806D9B6}, lcid=0, major=1, minor=2
> >>> # Use these commands in Python code to auto generate .py support
> >>> from win32com.client import gencache
> >>> 
>gencache.EnsureModule('{565783C6-CB41-11D1-8B02-00600806D9B6}',
> 0, 1, 2)

Ah. I knew there had to be some other way of doing it. While I'm
on the subject, is there anything I can offer to do within the
wmi module itself which will make it easier to py2exe it? It
doesn't look like it, but I thought I'd make the offer.

TJG


________________________________________________________________________
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From gerrit at nl.linux.org  Sat Jan  3 08:09:48 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Sat, 3 Jan 2004 14:09:48 +0100
Subject: Filename type (Was: Re: finding file size)
In-Reply-To: <bt6bi3$25j$06$2@news.t-online.com>
References: <4V4Jb.12709$Vl6.2811218@news20.bellglobal.com>
	<bt3l9i$pog$07$3@news.t-online.com>
	<mailman.45.1073125105.12720.python-list@python.org>
	<bt6bi3$25j$06$2@news.t-online.com>
Message-ID: <20040103130948.GA30485@nl.linux.org>

Martin v. Loewis wrote:
> Gerrit Holl wrote:
> >Any comments?
> 
> It should be possible to implement that type without modifying
> Python proper.

It should indeed. But it isn't what I had in mind, and it's not exactly
the same as a filename type in the language: for example, the name
attribute of a file will still be a string, just as the contents of
os.listdir, glob.glob, etc. (it seems glob follows listdir).

> It might make a good recipe for the cookbook.

If the type would be created without changing python proper, the type
would probably just call os.path.foo for the filename.foo method. It
would be the other way around if the type would become part of the
language: os.path would only be there for backward compatibility, like
string. But in order for os.listdir (and probably more functions) to
return Path objects rather than strings, a C implementation would be
preferable (necessary?). On the other hand, would this type ever be
added, a python implementation would of course be a must.

> Any volunteers?

I may have a look at it.
When thinking about it, a lot more issues than raised in my first post
need to be resolved, like what to do when the intializer is empty...
curdir? root? 

I guess there would a base class with all os-independent stuff, or stuff
that can be coded independently, e.g:
class Path(str):
    def split(self):
        return self.rsplit(self.sep, 1)
    def splitext(self):
        return self.rsplit(self.extsep, 1)
    def basename(self):
        return self.split()[1]
    def dirname(self):
        return self.split()[0]
    def getsize(self):
        return os.stat(self).st_size
    def getmtime(self):
        return os.stat(self).st_mtime
    def getatime(self):
        return os.stat(self).st_atime
    def getctime(self):
        return os.stat(self).st_ctime

where the subclasses define, sep, extsep, etc.

yours,
Gerrit.

-- 
168. If a man wish to put his son out of his house, and declare before
the judge: "I want to put my son out," then the judge shall examine into
his reasons. If the son be guilty of no great fault, for which he can be
rightfully put out, the father shall not put him out.
          -- 1780 BC, Hammurabi, Code of Law
-- 
Asperger's Syndrome - a personal approach:
	http://people.nl.linux.org/~gerrit/english/



From jjl at pobox.com  Tue Jan 13 13:46:13 2004
From: jjl at pobox.com (John J. Lee)
Date: 13 Jan 2004 18:46:13 +0000
Subject: C++ bad-mouthing (was: Why learn Python ??)
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<7xisjh1e3i.fsf@ruckus.brouhaha.com>
	<10064loqc7sd7e3@corp.supernews.com>
	<7xeku496wx.fsf@ruckus.brouhaha.com>
	<donn-9D2291.16343412012004@nntp6.u.washington.edu>
	<40041576.D070723E@engcorp.com>
	<donn-8DC721.09485713012004@nntp6.u.washington.edu>
Message-ID: <87smijit56.fsf@pobox.com>

Donn Cave <donn at u.washington.edu> writes:
[...]
> code that all these teams is writing will eventually come
> together and work like it's supposed to, and from that
> point of view it's tempting to look for some support for
> architectural consistency, like "interfaces" and that sort
> of thing.

Not sure about "that sort of thing" <wink>, but more explicit
interfaces do seem like a real issue here.  It's interesting to note
that Zope, a notable large Python project, has moved (and is moving)
in this direction.


John


From Mike at DeleteThis.Geary.com  Thu Jan 15 03:15:48 2004
From: Mike at DeleteThis.Geary.com (Michael Geary)
Date: Thu, 15 Jan 2004 00:15:48 -0800
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
	<K_YMb.10994$9k7.204413@news.xtra.co.nz>
	<bu1qq3$cu440$1@ID-207230.news.uni-berlin.de>
	<n22Nb.11299$9k7.210522@news.xtra.co.nz>
	<bu2pgs$d123a$1@ID-207230.news.uni-berlin.de>
	<4004EC9E.1E2E2893@alcyone.com>
	<23891c90.0401140223.344b22af@posting.google.com>
	<100bbb6kj9m03a4@corp.supernews.com>
	<bu4cdk$cv09p$1@ID-207230.news.uni-berlin.de>
Message-ID: <100cj1ke8h4b781@corp.supernews.com>

Brandon J. Van Every wrote:
> Is there something fundamentally *wrong* with recognizing how
> useless people are to your purposes?

It gives people the impression that you have a bad attitude, that you want
something from them and don't want to give anything in return.

As a result, people will not want to help you achieve your purposes.

Is it wrong? That's for you to decide. It's certainly self-defeating.

-Mike




From miki.tebeka at zoran.com  Thu Jan  8 07:57:57 2004
From: miki.tebeka at zoran.com (Miki Tebeka)
Date: 8 Jan 2004 04:57:57 -0800
Subject: Chaning self?
Message-ID: <4f0a9fdb.0401080457.3d60adb5@posting.google.com>

Hello,

I'm trying to create a class which is a bit array. I've done the following:
class bitarray(long):
    def __init__(self, value):
        super(long, self).__init__(value)

    def __getitem__(self, index):
        if self & (1 << index):
            return 1
        else:
            return 0

    def __setitem__(self, index, value):
        if value not in (0, 1):
            raise ValueError("must be 0 or 1")
        if value:
            self |= (1 << index)
        else:
            self &= (~ (1 << index))

However the __setitem__ does not work:
>>> b = bitarray(5)
>>> b[0]
1
>>> b[1]
0
>>> b[2]
1
>>> b[0] = 0
>>> b
5L
>>> b[0]
1

What am I missing?

Thanks.
Miki


From cawilcoxREMOVE at NO_SPAMcharter.net  Wed Jan 14 00:19:01 2004
From: cawilcoxREMOVE at NO_SPAMcharter.net (cadprogrammer)
Date: Tue, 13 Jan 2004 23:19:01 -0600
Subject: Python implementation of XForms viewer
Message-ID: <1009ka5kh8i3efa@corp.supernews.com>

Anyone working on, or know of a Python implementation of an XForms 
viewer?  All I've found so far are mostly written in Java...

Christian


From mcfletch at rogers.com  Fri Jan 30 03:49:48 2004
From: mcfletch at rogers.com (Mike C. Fletcher)
Date: Fri, 30 Jan 2004 03:49:48 -0500
Subject: newbie py2exe difficulty
In-Reply-To: <PsoSb.329649$JQ1.232982@pd7tw1no>
References: <PsoSb.329649$JQ1.232982@pd7tw1no>
Message-ID: <401A1AAC.6050709@rogers.com>

Open a command-prompt window. (You'll find the command-prompt's icon in 
Start|Programs or Start|Programs|Accessories, it may be called "MSDOS 
Prompt".) 

Switch to the directory where your setup.py file is (use the shell's cd 
command to move between directories, you can use the "dir" command to 
see what files are in the current directory to confirm that the setup.py 
file is present),

        P:\>cd OpenGLContext

        P:\OpenGLContext>dir setup.py
         Volume in drive P is DATASTORE
         Volume Serial Number is 74A4-1C80

         Directory of P:\OpenGLContext

        27/01/2004  06:01p               3,853 setup.py
                       1 File(s)          3,853 bytes
                       0 Dir(s)  11,575,771,136 bytes free

*then* run:

        python setup.py py2exe --help

from that command prompt.  You may need to specify the full path to 
python if you haven't added your python installation directory to the 
path, something like:

        P:\OpenGLContext>c:\bin\lang\py23\python.exe setup.py build
        running build
        running build_py
        running build_ext

depending on where you installed python.

HTH, and good luck,
Mike


Elaine Jackson wrote:

>Hi. I'm trying to use py2exe (http://starship.python.net/crew/theller/py2exe/)
>in Windows 98. I copied the necessary files into my Python23 directory (where I
>  
>
...

>My problem is that, when I attempt to follow the first instruction (details
>follow), it opens a DOS window that may indeed display all available
>command-line flags to the py2exe command, but isn't very helpful because it
>immediately disappears. (In fact I'm really not sure what a command-line flag
>is, or what I'm supposed to do with it.) I've also tried simply running
>setup.py: the DOS window disappeared immediately and there was no 'dist'
>directory in evidence.
>  
>
...

_______________________________________
  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://members.rogers.com/mcfletch/





From gerrit at nl.linux.org  Sat Jan 17 14:46:59 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Sat, 17 Jan 2004 20:46:59 +0100
Subject: yield
In-Reply-To: <20040117181510.GA21559@mrna.tn.nic.in>
References: <20040117170808.GA21486@mrna.tn.nic.in>
	<20040117165920.GA31881@nl.linux.org>
	<20040117181510.GA21559@mrna.tn.nic.in>
Message-ID: <20040117194659.GA9147@nl.linux.org>

Hi km,

km wrote:
> Hi gerrit,
> 
> i ran the snippet but i am sorry, i couldnt get what u were saying.
> kindly enlighten,

If a function reads a 'return' statement, it is finished. It returns the
value, and never reaches the part after the 'return' statement. If a
generator reaches a 'yield' statement, it returns the result of the
expression behind the 'yield' statement. When you call a function which
returns values not with 'return' but with 'yield', it returns a
generator. When you call the 'next' method of the generator, the body is
executed, until it reaches a 'yield' statement. When you call the body
again, it is executed again, until it reaches a 'yield' statement again,
etc, until it does not reach any 'yield' statement again, and then it
raises StopIteration. This way, you can for example implement something
which returns the Fibonacci series:

>>> def f():
...    a, b = 0, 1
...    while True:
...        a, b = b, a+b
...        yield a

You can now define a generator by calling f():

>>> g = f()
>>> g.next()
1
>>> g.next()
1
>>> g.next()
2
>>> g.next()
3
>>> g.next()
5
>>> g.next()
8
>>> g.next()
13

...etc. It would be difficult to do this with a function. You could use
a global variable, or create a class with some methods, but the first
way is ugly and the second way is really a different way to create a
generator (I think it's called an 'explicit generator' whereas a
function with a yield statement is an 'implicit generator' - I'm not
sure, maybe someone can clarify?). An 'iterator' is anything you can put
'for' in front of. You could do 'for i in g:' here, but it would be an
endless loop, so we'll break out of it:

>>> for i in g:
...    print i,
...    if i > 100:
...        break
21 34 55 89 144

It started at 21 because that's where we stopped with our last .next()
method.

Generators are documented at different places in the documentation. The
tutorial: http://www.python.org/doc/current/tut/node11.html
What's new: http://www.python.org/doc/2.3.3/whatsnew/section-generators.html
PEP 255: http://www.python.org/peps/pep-0255.html

There is also information in the Language Reference, but this is
probably not very useful.

yours,
Gerrit.

-- 
40. He may sell field, garden, and house to a merchant (royal agents)
or to any other public official, the buyer holding field, house, and
garden for its usufruct.
          -- 1780 BC, Hammurabi, Code of Law
-- 
PrePEP: Builtin path type
    http://people.nl.linux.org/~gerrit/creaties/path/pep-xxxx.html
Asperger's Syndrome - a personal approach:
	http://people.nl.linux.org/~gerrit/english/



From nospam at nopes  Sat Jan  3 01:50:04 2004
From: nospam at nopes (Steve)
Date: Sat, 03 Jan 2004 17:50:04 +1100
Subject: End of file?
Message-ID: <3ff665fb$1@clarion.carno.net.au>

Hi,

I'm having trouble finding out if output from a pipe has finished (i.e. 
I can't find tell if there's a EOF in output.readlines()). How do I do 
this? Because readlines() can return empty lines and I can't simply 
check if the line is empty. Please somebody help me!

Thanks.

Steve



From premshree_python at yahoo.co.in  Tue Jan 13 15:07:04 2004
From: premshree_python at yahoo.co.in (=?iso-8859-1?q?Premshree=20Pillai?=)
Date: Tue, 13 Jan 2004 20:07:04 +0000 (GMT)
Subject: Automating the Creation of Python Executables
Message-ID: <20040113200704.46040.qmail@web8309.mail.in.yahoo.com>

Here's a Windows Batch file that helps creating Python
executables for simple programs (using py2exe) just a
tad:
http://www.premshree.resource-locator.com/j/post.php?id=152

=====
-Premshree
[http://www.qiksearch.com/]

________________________________________________________________________
Yahoo! India Mobile: Download the latest polyphonic ringtones.
Go to http://in.mobile.yahoo.com



From a.schmolck at gmx.net  Tue Jan  6 23:23:02 2004
From: a.schmolck at gmx.net (Alexander Schmolck)
Date: 07 Jan 2004 04:23:02 +0000
Subject: selecting a random item from a set
References: <mailman.69.1072856600.8134.python-list@python.org>
Message-ID: <yfs65fos7yx.fsf@black132.ex.ac.uk>

[sorry for the late reply the server here had been down a couple of days and
then I was busy]

"Tim Peters" <tim.one at comcast.net> writes:

> [Tim, asks which algorithms require random selection, as opposed
>  to arbitrary selection, from a set]
> 
> [Alexander Schmolck]
> > Feature selection schemes, for example?
> 
> Eh?  That's like "numerical methods" <wink/frown>.  IOW, too vague.

Well, pretty much any scheme where the feature space is to large to explore
exhaustively, IOW from forward-backward feature selection to markov chain
monte carlo. If that's still to vague, I'd be happy to provide more detail.

> You can do it in O(1) space now at essentially full C speed via, e.g.,
> 
>     i = random.randrange(len(some_set))
>     random_elt = itertools.islice(some_set, i, None).next()
>     some_set.remove(random_elt)
> 
> That tricks it into finding the starting point with a C loop, and then the
> iterator is discarded after extracting its first element.

Yes, this is a much better (more readable and efficient)

 
> But (of course) that still takes average time proportional to the # of
> elements in the set.  Well, that wishes away a detail:  this can actually be
> arbitrarily expensive, as there's no bound on how sparse a Python dict can
> get, and the C dict iteration code has to visit every slot, occupied or not,
> to find "the next" occupied slot.  

Sure.
 
> If the sets are small, you're not going to beat random.choice(tuple(s)).

Yep, I had a vague feeling this might be the case and because it's also simple
and clear, so that's in fact what I used (almost -- I did list(s), which ought
to be only marginally slower I would think).

> If the sets are large, low-level optimization of an approach with the wrong
> O() behavior is just a monumentally bad idea. 

Unlikely, for the current application they should be < 100 elements. So I
guess I shall stick to the tuple-cast for the time being. 

Thanks -- this has been quite informative (and the other suggestions you made
might still come in handy at some point).

'as





From jjl at pobox.com  Wed Jan 14 20:48:17 2004
From: jjl at pobox.com (John J. Lee)
Date: 15 Jan 2004 01:48:17 +0000
Subject: wxPython worries
References: <mailman.352.1074092092.12720.python-list@python.org>
	<9d1c4d6d.0401141221.22c587f5@posting.google.com>
	<mailman.371.1074116502.12720.python-list@python.org>
Message-ID: <87eku2rnha.fsf@pobox.com>

James Goldwater <james at eccehomo.co.uk> writes:

> It's not the RADdish-ness (is that a word?) - drag'n'drop, property
> assignment etc - that concerns me, it's the ease of gui building - by
> hand is fine (oh how I've come to 'love' Java's layout managers...)

I'll make my usual comment, which is that nobody has yet contradicted
me (unusual on USENET ;-) that Qt is the most well-designed Python GUI
framework.  (Qt Designer is very good, too.)

And, strangely, the PyQt commercial license is far cheaper than (C++)
Qt.  $400 for former (Blackadder, from theKompany.com), $2500-odd for
the latter!

(before somebody asks: no, you *don't* need both licenses -- only the
cheap one from theKompany, who have an agreement with trolltech)

I believe Blackadder comes with Python-specific docs for PyQt, but
they're actually completely redundant, IMHO -- it's trivial to
translate the C++ docs to Python code, using the list of exceptions
distributed with PyQt.  Another BTW: their FAQ page still says
Blackadder is in beta, but I think somebody here mentioned the final
version was actually released some while back (PyQt itself has been
stable for years, of course).


> Custom controls is the biggie then. I think I'll have a punt at
[...]

PyQt is certainly good at this.


John


From jcarlson at nospam.uci.edu  Fri Jan 23 15:21:59 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Fri, 23 Jan 2004 12:21:59 -0800
Subject: when x process isn't running... do something
In-Reply-To: <burtrt$5gm$1@solaris.cc.vt.edu>
References: <burtha$5ck$1@solaris.cc.vt.edu> <burtrt$5gm$1@solaris.cc.vt.edu>
Message-ID: <burvt4$sq$2@news.service.uci.edu>

Bart Nessux wrote:

> Bart Nessux wrote:
> 
>> Howdy,
>>
>> I'm trying to time how long it takes dd to run on a G5, versus how 
>> long it takes to run on a G4 (PATA vs. SATA). Both sytems have Mac OS 
>> X 10.3.2 and Python 2.3. Could someone demonstrate how I might use 
>> Python to monitor for the presense of a process and to do something 
>> (in this case send an email which I know how to do) as soon as that 
>> process is no longer present? Any suggestions on how to monitor? Call 
>> top every 5 secs and read it's output searching for 'dd'???
>>
>> TIA,
>> Bart
>>
> 
> I forgot to mention the fact that I already know when the process began. 
> All I need to know is when it ends and then I can calculate the part in 
> between those two points.
> 

Why not just:

import time
import os
start = time.time()
s = os.system('dd <args>')
print time.time()-start


  - Josiah


From gamasutra1000 at yahoo.com  Thu Jan  1 20:31:49 2004
From: gamasutra1000 at yahoo.com (Julia Osip)
Date: 1 Jan 2004 17:31:49 -0800
Subject: newbie question
References: <4ebabbc5.0312311614.2446e31c@posting.google.com>
	<mailman.8.1072918504.12720.python-list@python.org>
Message-ID: <4ebabbc5.0401011731.6f33a396@posting.google.com>

Didnt realise I was posting into an existing topic.  Whitespace was
the problem, its working now.  Will consider the mailing list in the
future.  Thanks very much for your help!


Sean 'Shaleh' Perry <shaleh at speakeasy.net> wrote in message news:<mailman.8.1072918504.12720.python-list at python.org>...
> On Wednesday 31 December 2003 16:14, Julia Osip wrote:
> > Hi, just started fiddling around with python, having some difficulty
> > getting the following small play program to execute.  Furious
> > searching in the docs, manual, newsgroup did not avail me, does anyone
> > have any ideas what might be the problem?  Some sort of whitespace
> > issue (im still unsure of whitespace rules)?  I'm running Mac OS
> > 10.2.8, with MacPython 2.3.
> >
> 
> you might consider joining the tutor at python.org mailing list.  It is meant to 
> help people new to python.
> 
> > Thanks for any help you can give...
> >
> > the code
> > ...snip...
> >
> > the error
> > ...snip...
> >   File "<string>", line 7
> >     def __init__(self):
> >     ^
> > SyntaxError: invalid syntax
> > ...snip...
> 
> As you guessed it is a whitespace problem.  So, let's clear up the whitespace 
> rules for you.
> 
> There is one key rule -- be consistent.  Python does not really care if you 
> use 4 space indents or 8.  It does care if you try to use both.  Same goes 
> for mixing spaces and tabs.  As Python reads your code it figures out what 
> your indent style is and then enforces that for the rest of the block.
> 
> When Python read your class definition the first indentation it found was for 
> the docstring which was 4 spaces.  Then it went to the next line of code and 
> found an indentation of 8.  This is what caused the error.  Now, maybe this 
> is because you hand indented the docstring by four spaces and then used a tab 
> on the line starting with 'def'.  Or maybe you thought you needed to indent 
> again (you don't).


From mcherm at mcherm.com  Thu Jan 15 11:52:14 2004
From: mcherm at mcherm.com (Michael Chermside)
Date: Thu, 15 Jan 2004 08:52:14 -0800
Subject: Does anyone else not find the fun in programming...?
Message-ID: <1074185534.4006c53ea395f@mcherm.com>

Chris Lyon writes:
> I find python very effective as a language and can generally project
> most of my hazy thoughts into it. But FUN !!! This is work dammit,
> I have now ground my teeth down from the number of times I read that
> programming is fun. Football (association) is fun, walking along
> canals is fun, Arguing about quite how useless the British Government
> is fun but programming  ?
> 
> Do I need help ?

Well, I can only speak for myself, but *I* _DO_ find programming fun.
When I was in college, I used to practically disapear every once in
a while for nearly a week at a time while working furiously on a 
program. These days, when I get a free weekend (which is somewhere
between hardly ever and never), I will sometimes spend it writing a
program for something like a game I was inspired to create. The fact
that in my day job they pay me to do programming is just, well, great!
Of course, I don't enjoy every moment. Right now I really need to
spend the rest of the day writing up release notes and deployment
plans for the latest version of our software, and that's not my
favorite part of the job. But I couldn't take the same kind of pride
in my work if I didn't see to it that even our release notes are of
the same high quality as our code.

Perhaps I'm just VERY fortunate... but then before I worked as a
programmer, I used to be a teacher, and I ALSO enjoyed doing that
job. My recomendation is to try to find a job which you really
enjoy doing. After all, why waste such a large portion of your life
on something that isn't rewarding? Sure, you still need to eat, but
(at least in the USA where I live) it doesn't take NEARLY as much
money to live on as most people seem to think, and there are many
different ways of earning a living.

-- Michael Chermside




From kkzuberi at yahoo.com  Tue Jan 13 11:00:55 2004
From: kkzuberi at yahoo.com (Khalid Zuberi)
Date: Tue, 13 Jan 2004 11:00:55 -0500
Subject: Accessing "GIS (ESRI shape file)" files from Python ?
In-Reply-To: <282f826a.0401130315.5b92b2aa@posting.google.com>
References: <282f826a.0401121907.498543e6@posting.google.com>
	<282f826a.0401130315.5b92b2aa@posting.google.com>
Message-ID: <bu14nq$vlc$1@sea.gmane.org>

Richard Shea wrote:
> That's great - thanks very much just downloading Thuban now.
> 
> thanks again.
> 
> richard shea.

And if that doesn't work out, you might also try:

   http://openev.sourceforge.net/

which appears to have ESRI Shapefile support, and to be 
scriptable in python.

- Khalid





From beliavsky at aol.com  Fri Jan 16 08:36:07 2004
From: beliavsky at aol.com (beliavsky at aol.com)
Date: 16 Jan 2004 05:36:07 -0800
Subject: do loop
Message-ID: <3064b51d.0401160536.5d80fa97@posting.google.com>

In a Python 'for' loop, one can change the value of looping variable,
so that

for i in range(3):
    i = i*5
    print i

is legal code

In Fortran 90 and 95, the analogous code

do i=0,2
   i = i*5
   print*,i	
end do

is illegal, because variable 'i' cannot be changed inside the loop.
The constraint of not allowing the loop variable to change within the
body of the loop can prevent errors in logic when the body of the loop
is large.

Is there a way to write a loop in Python that enforces this
constraint? Should such functionality be added to the language?


From Markus.Franke at informatik.tu-chemnitz.de  Fri Jan  2 10:56:56 2004
From: Markus.Franke at informatik.tu-chemnitz.de (Markus Franke)
Date: Fri, 2 Jan 2004 15:56:56 +0000 (UTC)
Subject: Python and Tk: Error on Memory Access
References: <slrnbv2iu8.18l.Markus.Franke@herein.hrz.tu-chemnitz.de>
	<bsrin7$aid$04$1@news.t-online.com>
Message-ID: <slrnbvb568.uoq.Markus.Franke@herein.hrz.tu-chemnitz.de>

Hi,

In article <bsrin7$aid$04$1 at news.t-online.com>, Martin v. Loewis wrote:
> 
> On Redhat 9, you should either use the packages that the
> system vendor provides, or you should compile Python yourself.
> Installing a foreignly-built Python is likely to give problems
> with Tk.

I have already installed the packages for Red Hat 9, but the Error
still comes. Could this be perhaps a problem of my Developer-Kernel.

Greets
Markus Franke


From http  Sun Jan 11 21:15:39 2004
From: http (Paul Rubin)
Date: 11 Jan 2004 18:15:39 -0800
Subject: Division oddity
References: <ssn3009029rrug3l8dk1pn06tqd019ucld@4ax.com>
Message-ID: <7xeku5vrn8.fsf@ruckus.brouhaha.com>

Tim Rowe <tim at remove_if_not_spam.digitig.co.uk> writes:
> If I do from __future__ import division then eval(1/2) gives me 0.5 as
> expected. But if I do print input("enter a sum: ") and enter 1/2 as
> the sum I get 0 as if I hadn't done the import.  I thought input was
> supposed to give the same behaviour as an eval on raw input -- why the
> difference here?

The input function is calling eval from the context of the module
where 'input' itself is defined.  If you use "from __future__ import
division" in module A and have "print 3/2" in module B, the value of
3/2 in module B shouldn't be affected by the input, since module B
may depend on integer division having the old behavior.

The result is a little bit surprising at first glance though, so it
should probably be documented.


From newsgroups at jhrothjr.com  Sat Jan  3 19:44:42 2004
From: newsgroups at jhrothjr.com (John Roth)
Date: Sat, 3 Jan 2004 19:44:42 -0500
Subject: Creating a capabilities-based restricted execution system
References: <LmmdnUn4seDeGWuiXTWc-w@speakeasy.net>
	<vvdfljlg0gce9c@news.supernews.com>
	<9Jecnc6TZdy4lGqiXTWc-w@speakeasy.net>
	<vveg0bb6is2f60@news.supernews.com> <bt7lbp$ovg$1@panix2.panix.com>
Message-ID: <vveohcpod4oje0@news.supernews.com>


"Aahz" <aahz at pythoncraft.com> wrote in message
news:bt7lbp$ovg$1 at panix2.panix.com...
> In article <vveg0bb6is2f60 at news.supernews.com>,
> John Roth <newsgroups at jhrothjr.com> wrote:
> >"Sean R. Lynch" <seanl at chaosring.org> wrote in message
> >news:9Jecnc6TZdy4lGqiXTWc-w at speakeasy.net...
> >> John Roth wrote:
> >>>
> >>> Yes, you're missing something really obvious. Multi-level security
> >>> is a real difficult problem if you want to solve it in a believable
> >>> (that is, bullet-proof) fashion. The only way I know of solving it
> >>> is to provide separate execution environments for the different
> >>> privilege domains.  In the current Python structure, that means
> >>> different interpreters so that the object structures don't intermix.
> >>
> >> Hmmm, can you give me an example of a Python application that works
> >> this way? Zope seems to be doing fine using RestrictedPython.
> >> RestrictedPython is, in fact, an attempt to provide different
> >> execution environments within the same memory space, which is the
> >> whole point of my exercise. Now, I know that the lack of an example
> >> of insecurity is not proof of security, but can you think of a way to
> >> escape from RestrictedPython's environment? DoS is still possible,
> >> but as I'm not planning on using this for completely untrusted users,
> >> I'm not too concerned about that.
> >
> >Restricted Python was withdrawn because of a number of holes, of which
> >new style classes were the last straw.
>
> RestrictedPython was *not* withdrawn; rexec was withdrawn.  This is a
> difficult enough issue to discuss without confusing different modules.
See
>
http://dev.zope.org/Wikis/DevSite/Projects/SupportPython21/RestrictedPython

I'm not sure what you're trying to say. The Zope page you reference
says that they were (prior to 2.1) doing things like modifying generated
byte code and reworking the AST. That's fun stuff I'm sure, but it
doesn't have anything to do with "Restricted Execution" as defined in the
Python Library Reference, Chapter 17, which covers Restricted Execution,
RExec and Bastion (which was also withdrawn.)

If I confused you with a subtle nomenclature difference, sorry. I don't
care what Zope is doing or not doing, except for the fact that it seems
to come up in this discussion. I'm only concerned with what Python is
(or is not) doing. The approach in the Wiki page you pointed to does,
however, seem to be a substantially more bullet-proof approach than
Python's Restricted Execution.

John Roth

> -- 
> Aahz (aahz at pythoncraft.com)           <*>
http://www.pythoncraft.com/
>
> Weinberg's Second Law: If builders built buildings the way programmers
wrote
> programs, then the first woodpecker that came along would destroy
civilization.




From mwh at python.net  Thu Jan 22 05:17:45 2004
From: mwh at python.net (Michael Hudson)
Date: Thu, 22 Jan 2004 10:17:45 GMT
Subject: SystemError while execing bad code
References: <mailman.543.1074599606.12720.python-list@python.org>
	<m3hdyp5ae5.fsf@pc150.maths.bris.ac.uk>
	<mailman.607.1074717260.12720.python-list@python.org>
Message-ID: <m38yk05ltj.fsf@pc150.maths.bris.ac.uk>

Skip Montanaro <skip at pobox.com> writes:

>     Gerrit> exec CodeType(0,0,0,0,"",(),(),(),"","",0,"")
>     ...
>     Gerrit> But I guess this is a case of "so don't do it" :-)?
> 
>     Michael> Definitely.  It's easy enought to crash the interpreter this
>     Michael> way (think LOAD_CONST 30000, for just one easy way).
> 
> In fact, help(types.CodeType) describes it thusly:
> 
>     Create a code object.  Not for the faint of heart.
> 
> Should this sort of stuff be published on the Wiki?

I don't understand what you're suggesting here.

Cheers,
mwh

-- 
  Python enjoys making tradeoffs that drive *someone* crazy <wink>.
                                       -- Tim Peters, comp.lang.python


From mwh at python.net  Thu Jan 15 07:26:39 2004
From: mwh at python.net (Michael Hudson)
Date: Thu, 15 Jan 2004 12:26:39 GMT
Subject: Why gmp is not in the standard library?
References: <4f0a9fdb.0401150211.615a7f45@posting.google.com>
Message-ID: <m3hdyxv1mp.fsf@pc150.maths.bris.ac.uk>

miki.tebeka at zoran.com (Miki Tebeka) writes:

> Hello All,
> 
> On a different thread Skip wrote:
> > Yes, you're right.  Starting at 2**1000 I found three safe primes quite
> > quickly.  Using my version I gave up waiting after seeing one safe prime
> > float by.
> 
> Which made me think why Python don't use gmp as it's primary math
> package - we'll get fast results, a lot of number types and much more.
> 
> Can't think of any reason why Python is implementing its own long
> numbers...
> Can you enlighten me?

Licensing?  IIRC, GMP is GPL.

Also, possibly, portability.

Cheers,
mwh

-- 
34. The string is a stark data structure and everywhere it is
    passed there is much duplication of process.  It is a perfect
    vehicle for hiding information.
  -- Alan Perlis, http://www.cs.yale.edu/homes/perlis-alan/quotes.html


From rmkrauter at yahoo.com  Mon Jan 26 20:11:39 2004
From: rmkrauter at yahoo.com (Rich Krauter)
Date: Mon, 26 Jan 2004 20:11:39 -0500
Subject: efficient updating of nested dictionaries
In-Reply-To: <bv2e21$j5e$2@news.service.uci.edu>
References: <H%_Qb.2609$925.1917@nwrddc02.gnilink.net>
	<mailman.786.1075088534.12720.python-list@python.org>
	<bv2e21$j5e$2@news.service.uci.edu>
Message-ID: <1075165899.15570.60.camel@vaio>

>> String concatenation is not that lame, but I'd use tuples:
>> MY_DICT[(KEY_X, KEY_Y, KEY_Z)] = FOO
>> Tuples save on string operations.


What a nice way to simplify this common task. That's great. Thanks for
the advice. 
Rich
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From mcfletch at rogers.com  Sat Jan  3 17:23:41 2004
From: mcfletch at rogers.com (Mike C. Fletcher)
Date: Sat, 03 Jan 2004 17:23:41 -0500
Subject: Filename type (Was: Re: finding file size)
In-Reply-To: <20040103165041.GA31412@nl.linux.org>
References: <4V4Jb.12709$Vl6.2811218@news20.bellglobal.com>	<bt3l9i$pog$07$3@news.t-online.com>	<mailman.45.1073125105.12720.python-list@python.org>	<bt6c23$c6u$07$1@news.t-online.com>
	<20040103165041.GA31412@nl.linux.org>
Message-ID: <3FF740ED.9020909@rogers.com>

Gerrit Holl wrote:

>Peter Otten wrote:
>  
>
>>http://mail.python.org/pipermail/python-list/2002-June/108425.html
>>
>>http://members.rogers.com/mcfletch/programming/filepath.py
>>
>>has an implementation of your proposal by Mike C. Fletcher. I think both
>>filename class and os.path functions can peacefully coexist.
>>    
>>
>
>Thanks for the links.
>(I think they don't, by the way)
>  
>
You hawks, always seeing war where we see peace :) ;) . 

Seriously, though, a path type would eventually have ~ the same relation 
as the str type now does to the string module.  Initial implementations 
of a path type are going to use the os.path stuff, but to avoid code 
duplication, the os.path module would eventually become a set of trivial 
wrappers that dispatch on their first argument's method(s) (after 
coercian to path type).

Is that peaceful?  I don't know.  If there's a war, let's be honest, 
os.path is going to take a good long while to defeat because it's there 
and embedded directly into thousands upon thousands of scripts and 
applications.  We can fight a decent campaign, making a common module, 
then getting it blessed into a standard module, encouraging newbies to 
shun the dark old os.path way, encouraging maintainers to use the new 
module throughout their code-base, etceteras, but os.path is going to 
survive a good long while, and I'd imagine that being friendly toward it 
would keep a few of our comrades off the floor.

Just as a note, however, we haven't had a *huge* outpouring of glee for 
the current spike-tests/implementations.  So it may be that we need to 
get our own little army in shape before attacking the citadel :) .

Have fun,
Mike

_______________________________________
  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://members.rogers.com/mcfletch/






From mark at mceahern.com  Tue Jan 20 20:33:51 2004
From: mark at mceahern.com (Mark McEahern)
Date: Tue, 20 Jan 2004 19:33:51 -0600
Subject: regular expression question
In-Reply-To: <slrnc0rifk.d0s.grey@dmiyu.org>
References: <slrnc0rifk.d0s.grey@dmiyu.org>
Message-ID: <1074648830.5354.81.camel@dev.internal>

On Tue, 2004-01-20 at 18:38, Steve Lamb wrote:
>     Ok, this just seems convluted.
> 
> import re
> line = 'match this'
> foo = re.search(r'.*(this)', line)
> foo.groups()[0]
> 
>     To me there seems there should be a way to return a group without having
> to get the tuple and then slice it out from there.  However foo.group(0) will
> return the entire string (only one argument given) and groups doesn't seem to
> do anything significant with any entry I give it.  Am I missing something
> obvious or is this the final solution?

Have you bothered to read the docs on Match objects?

  import re
  line = 'match this'
  match = re.search(r'.*(this)', line)
  print match.group(1)

// m




From axel.mittendorf at transfertech.de  Thu Jan 15 10:03:21 2004
From: axel.mittendorf at transfertech.de (Axel Mittendorf)
Date: Thu, 15 Jan 2004 16:03:21 +0100
Subject: QT usage confusion
References: <40069912$0$251$4d4ebb8e@news.nl.uu.net>
Message-ID: <4006ABB9.D25CBB35@transfertech.de>

"Guyon Mor?e" wrote:
[snip]
> I have read multiple docs about it and searched this newsgroup I came to the
> conclusion that, as I am a windows user, I have only 2 options:
> 
> - buy a commercial qt license
> - try it out for 30 days (!)
you can get qt working with cygwin (since KDE works on windows this
way), but
I got no information about pyqt.

HTH,
Axel


From aahz at pythoncraft.com  Wed Jan 14 11:38:47 2004
From: aahz at pythoncraft.com (Aahz)
Date: 14 Jan 2004 11:38:47 -0500
Subject: Multiple interpreters in a single process
References: <btbso8$etl$1@atlantis.news.tpi.pl>
Message-ID: <bu3ran$kgo$1@panix3.panix.com>

In article <btbso8$etl$1 at atlantis.news.tpi.pl>,
Maciej Sobczak  <no.spam at no.spam.com> wrote:
>
>I'm interested in embedding the Python interpreter in a C++ application.
>What I miss is the possibility to create many different interpreters, so 
>that the stuff that is running in one interpreter does not influence the 
>other. In essence, the interpreter can be used in different modules of a 
>single application. It would be nice to isolate them.

Unfortunately, it's not really possible to do that.  The problem is that
Python is designed to interface to C libraries, many of which use global
static variables.  So Python doesn't really try to allow isolated Python
instances.  Your best bet if you need true isolation is to run multiple
processes.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

A: No.
Q: Is top-posting okay?


From emile at fenx.com  Sat Jan  3 14:14:19 2004
From: emile at fenx.com (Emile van Sebille)
Date: Sat, 3 Jan 2004 11:14:19 -0800
Subject: Newbie question about memory management
References: <bsr299$eg0$1@news.Stanford.EDU>
Message-ID: <bt7471$moj$1@sea.gmane.org>

Oh Kyu Yoon:
> I am writing my first python program, and I have to deal with
several lists
> of double precision numbers that are about 10,000,000 in length.
> If I have 5 such lists, 5 x 10,000,000 x 8bytes ~ 400 MB which is
too much
> for the computer memory.
> Does anyone have better strategies to do this?

How about numeric with Kragen Sitaker's memory mapped files.
http://www.pfdubois.com/numpy/
http://pobox.com/~kragen/sw/arrayfrombuffer/

HTH,

Emile van Sebille
emile at fenx.com





From francisgavila at yahoo.com  Sun Jan 11 14:17:47 2004
From: francisgavila at yahoo.com (Francis Avila)
Date: Sun, 11 Jan 2004 14:17:47 -0500
Subject: Variable Scope 2 -- Thanks for 1.
References: <dcde6f.0401091247.c17b76e@posting.google.com>
	<dcde6f.0401111045.7fc24246@posting.google.com>
Message-ID: <10038cpbu23hv93@corp.supernews.com>

Jens Thiede wrote in message ...
>OK, thanks for sorting that out, but what do I replace in the
>following to avoid referancing:
>
>x = [[0]*5]*5
>x is [[0,0,0,0,0], [0,0,0,0,0], [0,0,0,0,0], [0,0,0,0,0], [0,0,0,0,0]]
>
>and after
>
>x[0][0] = 1;
>x is [[1,0,0,0,0], [1,0,0,0,0], [1,0,0,0,0], [1,0,0,0,0], [1,0,0,0,0]]

Ah, the joy of list comprehensions!

>>> x = [ [ 0 for i in range(5)] for j in range(5)]
>>> x
[[0, 0, 0, 0, 0], [0, 0, 0, 0, 0], [0, 0, 0, 0, 0], [0, 0, 0, 0, 0], [0, 0,
0, 0, 0]]
>>> x[0][0] = 1
>>> x
[[1, 0, 0, 0, 0], [0, 0, 0, 0, 0], [0, 0, 0, 0, 0], [0, 0, 0, 0, 0], [0, 0,
0, 0, 0]]
>>>

There are other ways, but using list comprehensions is the usual idiom now.

--
Francis Avila



From d.chirila at finsiel.ro  Fri Jan 30 11:18:57 2004
From: d.chirila at finsiel.ro (Dragos Chirila)
Date: Fri, 30 Jan 2004 18:18:57 +0200
Subject: NEWLINE character problem
References: <LNBBLJKPBEHFEDALKOLCKEIGIKAB.tim.one@comcast.net>
Message-ID: <013601c3e74c$c34bc780$2f01a8c0@dchirila>

Thanks a LOT !!

I will give it a try and see how it works... the problem is that I have
realy big strings (more than 50000 characters)

Dragos

----- Original Message ----- 
From: "Tim Peters" <tim.one at comcast.net>
To: <python-list at python.org>
Sent: Friday, January 30, 2004 5:49 PM
Subject: RE: NEWLINE character problem


> [Nuff, replying to someone who has strings with various line-end
>  conventions]
>
> > Say your string is s; then you could use the following
> > function (untested!) to make sure that s uses \n only:
> >
> >     def fix_lineendings(txt):
> >         if txt.count('\r\n'):  # MS DOS
> >             txt = txt.replace('\r\n', '\n')
> >         elif txt.count('\r'):  # Mac
> >             txt = txt.replace('\r', '\n')
> >
> >         return txt
> >
> > Simply write: s = fix_lineendings(s)
>
> That's in the right direction.  There's no need to count the *number* of
> each kind of oddball, and .count() does all the work that .replace() does
> anyway if there aren't any oddballs.  So the one-liner:
>
>     return s.replace('\r\n', '\n').replace('\r', '\n')
>
> does the same, but quicker.  Note that, as an internal optimization,
> .replace() doesn't build a new string object unless it finds something to
> replace, so it's actually slower to do an "if" test first.
>
> >>> s = 'abcdefghi\n\n'  # doesn't contain any oddballs
> >>> t = s.replace('\r\n', '\n').replace('\r', '\n')
> >>> s == t
> True  # nothing was replaced
> >>> s is t
> True  # more, the same string object was returned by both .replace()s
> >>>
>
>
> -- 
> http://mail.python.org/mailman/listinfo/python-list
>





From jjl at pobox.com  Fri Jan  9 15:16:54 2004
From: jjl at pobox.com (John J. Lee)
Date: 09 Jan 2004 20:16:54 +0000
Subject: urllib - changing the user agent
References: <8089854e.0401090509.3dd74859@posting.google.com>
	<n20uvvshb3mnj53qlbfto1fofamnomj88g@4ax.com>
Message-ID: <871xq8ri6h.fsf@pobox.com>

Terry Carroll <carroll at tjc.com> writes:

> On 9 Jan 2004 05:09:41 -0800, michael at foord.net (Fuzzyman) wrote:
> 
>  [ wants to change the user-agent in HTTP request from urllib ]
> 
> Fuzzy --
> 
> I take the easy way out, and use urllib2, instead:
[...]
>     req = urllib2.Request(url, None, req_headers)

or again, you can set .addheaders on OpenerDirector (which will cause
those headers to be added to all requests).


John


From http  Fri Jan  2 06:07:35 2004
From: http (Paul Rubin)
Date: 02 Jan 2004 03:07:35 -0800
Subject: question: Python or Lua for rejuvenation of old PCs?
References: <mailman.16.1072987285.12720.python-list@python.org>
	<dbc00a99.0401020243.1f89524c@posting.google.com>
Message-ID: <7xisjupq14.fsf@ruckus.brouhaha.com>

fBechmann at web.de (Frank Bechmann) writes:
> having read your application specs FORTH came to my mind, having the
> advantage that it is even more crude, so you have even less chances to
> intermix both languages. and no one will doubt that it is usefull for
> embedded controller tasks.

He's not asking about a tiny embedded processor.  Something with a 1
MB image would be fine.  FORTH would be over (under?) kill.  That
level of inconvenience is not needed.


From wxyisok at hotmail.com  Fri Jan  2 01:15:47 2004
From: wxyisok at hotmail.com (wang xiaoyu)
Date: 1 Jan 2004 22:15:47 -0800
Subject: how to use activex in wxpython with event support
Message-ID: <e4b04915.0401012215.3f6ff3fd@posting.google.com>

Hello:
i want use activex in wxpython program,but when i use MakeActiveXClass
an exception occurs.

this is my source code dealing the DICOM ocx.I must note that in this
program "hwtxcontrol" is a ocx developed my me use vc6,this ocx works
fine in wxpython.

but you can see i only change this ocx with a new DICOM ocx and set up
eventClass,

but the exception occure:

File ".\site-packages\wxPython\lib\activexwrapper.py", line 105, in
axw__init__
  File "D:\Py22\lib\site-packages\win32com\gen_py\3A75EE8D-8E68-43FF-A90A-E4835B9A3DBDx0x1x0.py",
line 187, in __init__
    cookie=cp.Advise(win32com.server.util.wrap(self,
usePolicy=EventHandlerPolicy))
com_error: (-2147220990, 'CONNECT_E_CANNOTCONNECT', None, None)

the ocx and the source code (in delphi) you can down at:

http://www.psychology.nottingham.ac.uk/staff/cr1/dicomcom.html

from wxPython.wx import *
from wxPython.lib.rcsizer import RowColSizer
import pywin.mfc.activex
import activexwrapper,win32ui

if wxPlatform == '__WXMSW__':
    from wxPython.lib.activexwrapper import MakeActiveXClass    
    import win32com.client.gencache
    import win32com.client
    try:
        import hwtxcontrol
        hwtxocx=hwtxcontrol
        #import ezdicom
        #dicomocx=ezdicom
        #dicomocx=win32com.client.gencache.EnsureModule("{3A75EE8D-8E68-43FF-A90A-E4835B9A3DBD}",0,1,0)
        #dicomocx=win32com.client.Dispatch("ezDICOMax.ezDICOMX")
        dicomocx=win32com.client.gencache.EnsureModule('{3A75EE8D-8E68-43FF-A90A-E4835B9A3DBD}',
0, 1, 0)
    except:
        raise ImportError("IE4 or greater does not appear to be
installed.")

    class DicomControl(pywin.mfc.activex.Control, dicomocx.ezDICOMX):
        def __init__(self):
            pywin.mfc.activex.Control.__init__(self)
            dicomocx.ezDICOMX.__init__(self)
        def OnDCMmouseDown(self, X ,Y ,Button ,Shift):
                print "DICOM ocx Click!"

    class HwtxControl(pywin.mfc.activex.Control, hwtxocx.Hwtx):
        def __init__(self):
            pywin.mfc.activex.Control.__init__(self)
            hwtxocx.Hwtx.__init__(self)
        def OnClick(self):
            print "hwtx click!"
class TestPanel(wxWindow):
    def __init__(self, parent, log, frame=None):
        wxWindow.__init__(self, parent, -1,
                         
style=wxCLIP_CHILDREN|wxNO_FULL_REPAINT_ON_RESIZE)
        sizer = wxBoxSizer(wxVERTICAL)
        hwtxCtls=RowColSizer()
        theClass2 = MakeActiveXClass(dicomocx.ezDICOMX,eventClass=DicomControl)
        #theClass2 =
MakeActiveXClass(hwtxocx.Hwtx,eventClass=HwtxControl)
        self.ie4=theClass2(self,-1)
        self.ie4.SetSize(wxSize(300,300))
        #self.ie4.filename="e:\\d02.img"
        #self.ie4.palnumber=12
        #self.ie4.state=1
        hwtxCtls.Add(self.ie4, row=2, col=2)
        sizer.Add(hwtxCtls, 0, wxEXPAND)
        self.SetSizer(sizer)
        self.SetAutoLayout(True)
        EVT_WINDOW_DESTROY(self, self.OnDestroy)
    def OnDestroy(self, evt):
        if self.ie4:
            self.ie4.Cleanup()
            self.ie4 = None

def runTest(frame, nb, log):
    if wxPlatform == '__WXMSW__':
        win = TestPanel(nb, log, frame)
        return win
    else:
        dlg = wxMessageDialog(frame, 'This demo only works on MSW.',
                          'Sorry', wxOK | wxICON_INFORMATION)
        dlg.ShowModal()
        dlg.Destroy()

overview = __doc__

if __name__ == '__main__':
    class TestFrame(wxFrame):
        def __init__(self):
            wxFrame.__init__(self, None, -1, "ActiveX test -- Internet
Explorer",
                             size=(640, 480),
                            
style=wxDEFAULT_FRAME_STYLE|wxNO_FULL_REPAINT_ON_RESIZE)
            self.CreateStatusBar()
            self.tp = TestPanel(self, sys.stdout, self)
            EVT_CLOSE(self, self.OnCloseWindow)

        def OnCloseWindow(self, evt):
            self.tp.Destroy()
            self.Destroy()

    app = wxPySimpleApp()
    frame = TestFrame()
    frame.Show(True)
    app.MainLoop()

i am a new python programer but i was really attracted by it elegant
code.i really want use wxpython as my framework,but if i cant use
activeX,i will have to change to vb:(

can you help me.Best regards.

sincerely 

wangxiaoyu


From jjl at pobox.com  Sun Jan 18 07:27:57 2004
From: jjl at pobox.com (John J. Lee)
Date: 18 Jan 2004 12:27:57 +0000
Subject: yield
References: <mailman.456.1074358567.12720.python-list@python.org>
	<7iy8s5lx0x.fsf@enark.csis.hku.hk>
Message-ID: <8765f9qw4y.fsf@pobox.com>

Isaac To <kkto at csis.hku.hk> writes:

> >>>>> "km" == km  <km at mrna.tn.nic.in> writes:
> 
>     km> Hi all, i didnt understand the purpose of 'yield' keyword and the
>     km> concept of 'generators' in python.  can someone explain me with a
>     km> small example how generators differ from normal function calls?
> 
> Normally, when you define a function and call it, the code within the
> function gets executed, until the function returns, and at that point the
> function disappear altogether.  For example:
[...]

That's a misleading way of putting it: the *function* doesn't
disappear (you can still call it after it's finished), but its state
of execution does (you can't access its local variables after it's
finished, except by calling it again and getting a *new* set of local
variables).


John


From swalters_usenet at yahoo.com  Sun Jan 18 05:22:53 2004
From: swalters_usenet at yahoo.com (Samuel Walters)
Date: Sun, 18 Jan 2004 10:22:53 GMT
Subject: CGI Python user/group permission weirdness
References: <ead0449f.0401180124.5f0796b7@posting.google.com>
Message-ID: <pan.2004.01.18.10.21.20.719254@yahoo.com>

| Aienthiwan said |

> Ok - this one's a baffling one.
<chop>
> I have confirmed that it's the www-data user by calling a
> os.system('whoami') in my script for debugging.
<chop>
> The only inconsistancy is in dbtest and cvs. 

Have you tried os.system('groups') to verify that the user is in groups
dbtest and cvs?  Though I can't think of a reason why, maybe the script 
or the calling process is dropping it's privileges to these groups.

Have you tried making all the directories leading up to the path of the
file executable by dbtest and cvs?  Some oddball code may be walking to
the path, rather than jumping to the file.  How about world executable?

If you're just testing, you might also try making the files 777 for a
minute and testing to see if the problem persists.  (Don't leave this in
production, only use it to isolate the error.)

Try making a link from the file you want into another directory.  Can you
access it with the same permissions as the original, or perhaps with
different permission?

What www-daemon is this running on?  Some www-daemons can be configured to
lock down certain directories and var is a likely candidate for that.  Can
you access other files withing the var directory?  If you fail this test,
and succeed with the previous two tests, consider that it might be the
daemon with an out-of-box configuration to keep web-processes out of
sensitive system areas.

HTH

I'll post if I think of anything else.

Sam Walters.

-- 
Never forget the halloween documents.
http://www.opensource.org/halloween/
""" Where will Microsoft try to drag you today?
    Do you really want to go there?"""



From Z_kline at hotmail.com  Mon Jan 19 00:31:52 2004
From: Z_kline at hotmail.com (Zachary)
Date: Sun, 18 Jan 2004 21:31:52 -0800
Subject: Python Text Adventure Authoring System
References: <bufcp0$h36fj$1@ID-221199.news.uni-berlin.de>
	<mailman.489.1074478463.12720.python-list@python.org>
Message-ID: <bufq48$h4m37$1@ID-221199.news.uni-berlin.de>


"Jp Calderone" <exarkun at intarweb.us> wrote in message
news:mailman.489.1074478463.12720.python-list at python.org...
> On Sun, Jan 18, 2004 at 05:44:00PM -0800, Zachary wrote:
> > Hello,
>
> > I've recently thought of how ideal Python is for the development of what
> > used to be called text adventures.  In case any of you don't know, these
> > were basically sort of a computer game in which the player guided the
> > story by typing in natural language commands, e.g. get ball.
> >
> > Some popular games of the 1980's include Zork, A Mind Forever Voyaging,
> > among others.
> >
> > I was just wondering if anyone has any module that might help in the
> > implementation of a text parser, something to read player commands. My
> > idea is to have each room, item, creature, etc.  Be represented as a
> > Python instance.
> >
> > For example, the following code might setup a room class:
> >
> > class room:
> >     def __init__(self, rdesc, exit):
> >         self.desc = rdesc
> > #Add Other code here
> >
> > If anyone has any idea how this might be done, I would love to hear from
> > you.
> >
> > P.S:
> >
> > I have already seen another text adventure development system written in
> > Python, called Paws.  I thought this would be a sort of first project.
> >
>
>   There are a few modules in Twisted's CVS repository that are handy in
this
> area (as a few people are aware, Twisted is actually a support framework
for
> multiplayer interactive fiction or text adventure games).  Documentation
is
> sparse, but much of the code is pretty simple (a *few* parts are mind
> bendingly complex, but none of those are related to text parsing ;)
>
>     cvs -d:pserver:anon at cvs.twistedmatrix.com:/cvs co Reality
>     cvs -d:pserver:anon at cvs.twistedmatrix.com:/cvs co NewReality
>     cvs -d:pserver:anon at cvs.twistedmatrix.com:/cvs co Imagination
>
>   There was also a presentation about Reality at last year's PyCon.  The
> paper is available in Twisted CVS (history docs directory), or with
viewcvs
> at:
>
>
http://cvs.twistedmatrix.com/cvs/doc/historic/2003/pycon/twisted-reality/
>
>   Imagination represents the most current thinking on the topic, but
Reality
> and NewReality have more infrastructure for actually dealing with user
input
> (Imagination is like a hyper distillate of our ideas currently, and so
can't
> be bothered to cover such things as handling user input ;).
>
>   And of course, many of the developers frequent #twisted on
irc.freenode.net
> and just *love* it when someone wants to talk about Reality instead of
boring
> things like HTTP and IMAP4 ;)
>
>   Hope this helps,
>
>   Jp
>
Thanks for the advice, but I believe that the project could be considered
shelved for now.  I'll content myself with creating something smaller scale.




From fperez528 at yahoo.com  Tue Jan  6 14:02:39 2004
From: fperez528 at yahoo.com (Fernando Perez)
Date: Tue, 06 Jan 2004 12:02:39 -0700
Subject: Python as a numerical prototyping language.
References: <jZJDb.3529$7U1.27181@amstwist00>
	<67n0966wsz.fsf@aster.homelinux.net>
	<f70e3538.0401031959.4e1e57dd@posting.google.com>
Message-ID: <btf0of$jl4$1@peabody.colorado.edu>

Lonnie Princehouse wrote:

> About a year ago, I attempted to answer the question "Can Python
> replace Matlab?" for my workplace.  The conclusion was "Not quite
> yet", for two reasons.
> 
> The first was purely human: Matlab is entrenched, and there's always
> resistance to change (note: lots of people here still swear by Fortran
> '77).
> 
> The second reason: there's no unified Python environment that gives
> you easy access to plotting capability and an interpreter, a la
> Matlab.  Python has the ability to do everything Matlab can (and much
> more!) but it still requires just enough expertise to find, install,
> and learn the various scipy and plotting modules that only the
> early-adopter types are willing to do it.

<plug>
While I completely agree with you that it still requires a fair amount of
manual labor to get a nice scientific python environment going, you may want
to take a look at ipython at http://ipython.scipy.org.  It tries to provide as
good of an interactive shell as is feasible, along with improving on the
default Gnuplot support which Gnuplot.py provides (basically giving simpler
syntax for the plotting commands).  With its concept of profiles, you can
simply say

ipython --profile numeric

and have a command-line shell which preloads a complete matlab-like
environment.  It's not perfect, but users seem to like it.
</plug>

Regards,

Fernando.


From aahz at pythoncraft.com  Tue Jan  6 17:31:18 2004
From: aahz at pythoncraft.com (Aahz)
Date: 6 Jan 2004 17:31:18 -0500
Subject: prePEP "Decimal data type" v0.2
References: <mailman.150.1073408079.12720.python-list@python.org>
Message-ID: <btfcvm$5o5$1@panix1.panix.com>

In article <mailman.150.1073408079.12720.python-list at python.org>,
Batista, Facundo <FBatista at uniFON.com.ar> wrote:
>aahz at pythoncraft.com wrote:
>#
>#- One major correction: "Rationale" means "reason"; "rational" 
>#- refers to
>#- fractions.  Several times you use "rationale" when you mean 
>#- "rational".
>
>Paul Moore pointed that too, sorry for my english, :(

De nada; we're used to that around here.  Just needs fixing, is all.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

A: No.
Q: Is top-posting okay?


From skip at pobox.com  Wed Jan 28 12:32:19 2004
From: skip at pobox.com (Skip Montanaro)
Date: Wed, 28 Jan 2004 11:32:19 -0600
Subject: isinstance() bug
In-Reply-To: <bv8qhc$ph1mk$1@ID-223265.news.uni-berlin.de>
References: <mailman.907.1075296157.12720.python-list@python.org>
	<bv8lha$pbi5a$1@ID-223265.news.uni-berlin.de>
	<mailman.929.1075306173.12720.python-list@python.org>
	<bv8qhc$ph1mk$1@ID-223265.news.uni-berlin.de>
Message-ID: <16407.61987.454687.705426@montanaro.dyndns.org>


    Sidharth> i dont know unix.
    Sidharth> how does abs path work with sym-links.

Not well.  Seems that os.path.realpath does the right thing though:

    % ls -l /etc/rc2.d
    lrwxrwxrwx    1 root     root           10 May 21  2002 /etc/rc2.d -> rc.d/rc2.d/
    % python
    Python 2.2.3 (#1, Jun 21 2003, 08:08:22) 
    [GCC 3.0.1] on linux2
    Type "help", "copyright", "credits" or "license" for more information.
    >>> import os
    >>> os.path.abspath("/etc/rc2.d")
    '/etc/rc2.d'
    >>> os.path.realpath("/etc/rc2.d")
    '/etc/rc.d/rc2.d'

As someone else pointed out, the issue of multiple hard links to the same
file is a bit tougher nut to crack.

    % cd ~/tmp
    % cat > a.py
    class A: pass
    % ln a.py b.py
    % python
    Python 2.2.3 (#1, Jun 21 2003, 08:08:22) 
    [GCC 3.0.1] on linux2
    Type "help", "copyright", "credits" or "license" for more information.
    >>> import a
    >>> import b
    >>> a.A == b.A
    0

You need to compare inode numbers to see if you have the same or different
files. 

    >>> import stat
    >>> os.stat(a.__file__)[stat.ST_INO]
    37041L
    >>> os.stat(b.__file__)[stat.ST_INO]
    37041L

Skip



From irmen at -NOSPAM-REMOVETHIS-xs4all.nl  Thu Jan 22 18:21:31 2004
From: irmen at -NOSPAM-REMOVETHIS-xs4all.nl (Irmen de Jong)
Date: Fri, 23 Jan 2004 00:21:31 +0100
Subject: strtotime?
In-Reply-To: <kvYPb.242$af7.175373@newshog.newsread.com>
References: <kvYPb.242$af7.175373@newshog.newsread.com>
Message-ID: <40105afb$0$319$e4fe514c@news.xs4all.nl>

Leif K-Brooks wrote:
> PHP has a very nice strtotime function (http://php.net/strtotime) which 
> converts a date/time in virtually any format into a timestamp. Does 
> Python have a similar function?

I guess you're looking for:  time.strptime

--Irmen


From nhodgson at bigpond.net.au  Fri Jan 16 15:31:38 2004
From: nhodgson at bigpond.net.au (Neil Hodgson)
Date: Fri, 16 Jan 2004 20:31:38 GMT
Subject: Retrive unicode keys from the registry
References: <brp3bzwj.fsf@python.net>
Message-ID: <KSXNb.15179$Wa.2061@news-server.bigpond.net.au>

Thomas Heller:

> def RegQueryValue(root, subkey):
>     if isinstance(subkey, unicode):
>         return _winreg.QueryValue(root, subkey.encode("mbcs"))
>     return _winreg.QueryValue(root, subkey)
>
> Does this look ok?

   It will fail for keys that can not be encoded in your current code page.
That will not often be a problem but if you want to be safe then access to
the wide version is needed.

   Neil




From martin at v.loewis.de  Sun Jan 25 13:25:32 2004
From: martin at v.loewis.de (=?UTF-8?B?Ik1hcnRpbiB2LiBMw7Z3aXMi?=)
Date: Sun, 25 Jan 2004 19:25:32 +0100
Subject: trouble w/ unicode file
In-Reply-To: <bv0rg2$7bp$1@nadya.doma>
References: <mailman.752.1074995324.12720.python-list@python.org><bv007p$2ged$1@nadya.doma>
	<mailman.766.1075043602.12720.python-list@python.org>
	<bv0rg2$7bp$1@nadya.doma>
Message-ID: <bv11mq$cg9$03$1@news.t-online.com>

Serge Orlov wrote:

> Sorry, I was confused by your words "with some iso8859-1 strings".
> I thought you were using simple (unaware of encodings) editor and
> just added #-*- coding: utf-8 -*- with hope that it will work. You're
> right the coding should stay utf-8. After that you have two options:
> either use -U option or put u before every string.

There is a third option: Programmatically convert the strings to
Unicode, e.g.

# -*- coding: utf-8 -*-
s = "????????????"
s = unicode(s, 'utf-8')

This assumes that you know thy source encoding at the point of
conversion.

Regards,
Martin



From dlmurray at micro-net.com  Mon Jan  5 01:54:57 2004
From: dlmurray at micro-net.com (Dave Murray)
Date: Sun, 4 Jan 2004 23:54:57 -0700
Subject: intellectual property agreements and open source . was - Re: Why
	does this fail? [2]
References: <vvhdlm72386b3c@corp.supernews.com>
	<vvhkngs7oachad@corp.supernews.com>
	<84fc4588.0401042209.60cdb724@posting.google.com>
Message-ID: <vvi2i8b89928fa@corp.supernews.com>

After re-reading this part, I can see that it is an idea that I like. How
does participating in open source work for someone (me) who has signed the
customary intellectual property agreement with the corporation that they
work for? Since programming is part of my job, developing test solutions
implemented on automatic test equipment (the hardware too) I don't know if I
would/could be poison to an open source project. How does that work? I've
never participated. If all the work is done on someone's own time, not using
company resources, yadda-yadda-hadda-hadda, do corporate lawwwyaahhhs have a
history of trying to dispute that and stake a claim? No doubt, many of you
are in the same position.

Regards,
Dave


"Anand Pillai" <pythonguy at Hotpop.com> wrote in message
news:84fc4588.0401042209.60cdb724 at posting.google.com...
>   This is the main reason why developers release programs as
> opensource. Help the community, and help yourselves. Re-inventing
> the wheel is perhaps not the way to go.




From mwilson at the-wire.com  Fri Jan 23 09:51:21 2004
From: mwilson at the-wire.com (Mel Wilson)
Date: Fri, 23 Jan 2004 09:51:21 -0500
Subject: I support PEP 326
References: <mailman.654.1074788734.12720.python-list@python.org>
	<401081A1.E4C34F00@alcyone.com>
	<qnky8rzid3y.fsf@arbutus.physics.mcmaster.ca>
	<buq4ap$fsb$1@news.service.uci.edu>
Message-ID: <pTTEAls/KjvU089yn@the-wire.com>

In article <buq4ap$fsb$1 at news.service.uci.edu>,
Josiah Carlson <jcarlson at nospam.uci.edu> wrote:
>> Or, expressing the idea that they're the ends of a number line:
>>
>> PosInf, NegInf
>> PosInfinity, NegInfinity
>> PositiveInfinity, NegativeInfinity

Highest and Lowest?

        Regards.        Mel.


From lubowiecka at go2.pl  Mon Jan 26 15:50:39 2004
From: lubowiecka at go2.pl (Ringwraith)
Date: Mon, 26 Jan 2004 21:50:39 +0100
Subject: python service running on Win Xp,
	but failing on Win NT Workstation :(
References: <bv3bs0$la0$1@atlantis.news.tpi.pl>
Message-ID: <bv3uqr$5ji$1@nemesis.news.tpi.pl>

maybe another hint ...

While installing I got the error message:

"The procedure entry point RegisterServiceCtrlHandlerExW
could not be located in the dynamic link library ADVAPI32.dll"

Best wishes,

Sylwia -> aka Nazgul




From sross at connectmail.carleton.ca  Fri Jan  2 12:34:53 2004
From: sross at connectmail.carleton.ca (Sean Ross)
Date: Fri, 2 Jan 2004 12:34:53 -0500
Subject: finding file size
References: <4V4Jb.12709$Vl6.2811218@news20.bellglobal.com>
	<bt3l9i$pog$07$3@news.t-online.com>
Message-ID: <IXhJb.14141$Vl6.3177505@news20.bellglobal.com>


"Martin v. Loewis" <martin at v.loewis.de> wrote in message
news:bt3l9i$pog$07$3 at news.t-online.com...
> Sean Ross wrote:
>
> > My question is this: Is there a reason why file objects could not have a
> > size method or property?
>
> Yes. In Python, file objects belong to the larger category of "file-like
> objects", and not all file-like objects have the inherent notion of a
> size. E.g. what would you think sys.stdin.size should return (which
> actually is a proper file object - not just file-like)?
>
> Other examples include the things returned from os.popen or socket.socket.
>
> Regards,
> Martin
>

I see what you mean. I suppose the only option I could think of for
sys.stdin, os.popen, and socket.socket would be to return the number of
bytes written to these objects so far. But, then, those objects, or
something else, would have to track that information. Also, pipes and
sockets could be written to from two directions, so is the size the total
number of bytes written from both sides, or would you prefer to know how
much you'd written as the size, or how much the other side had written
(Perhaps all three would be nice). Another option would be to return '-1',
or 'None', to let people know that the request is unsupported for this
file-like object. Still another option would be to raise an exception. And,
of course, there's the ever popular, leave-well-enough-alone option.

Anyway, thank you for your response. I see it's merit.
Sean




From gerrit at nl.linux.org  Tue Jan 20 06:41:02 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Tue, 20 Jan 2004 12:41:02 +0100
Subject: Getting a process's output [solved]
In-Reply-To: <E7E8F62A-4AD9-11D8-A692-0003934ACDEC@zdome.net>
References: <82104858-4ACB-11D8-A692-0003934ACDEC@zdome.net>
	<20040119221350.GB11631@nl.linux.org>
	<E7E8F62A-4AD9-11D8-A692-0003934ACDEC@zdome.net>
Message-ID: <20040120114102.GA3264@nl.linux.org>

Dietrich Epp wrote:
> On Jan 19, 2004, at 2:13 PM, Gerrit Holl wrote:
> >Try commands.getstatusoutput() or the various popen functions.
> 
> Thanks, although getstatusoutput requires arguments to be quoted.  I 
> looked at the source code to getstatusoutput() and popen() to come up 
> with a replacement which doesn't need quoted arguments and doesn't 
> create a shell.  I don't think it portable, and it will undoubtedly do 
> something very nasty if one of the system calls should fail.  I think 
> this would be very cool in the library (the function, not its 
> deficiencies).

You may want to have a look at PEP 324, about a new process module:
http://www.python.org/peps/pep-0324.html

yours,
Gerrit.

-- 
20. If the slave that he caught run away from him, then shall he swear
to the owners of the slave, and he is free of all blame.
          -- 1780 BC, Hammurabi, Code of Law
-- 
PrePEP: Builtin path type
    http://people.nl.linux.org/~gerrit/creaties/path/pep-xxxx.html
Asperger's Syndrome - a personal approach:
	http://people.nl.linux.org/~gerrit/english/



From anton at vredegoor.doge.nl  Sat Jan 10 17:33:34 2004
From: anton at vredegoor.doge.nl (Anton Vredegoor)
Date: Sat, 10 Jan 2004 23:33:34 +0100
Subject: solving a small programm
References: <40004254$0$16669$ba620e4c@news.skynet.be>
	<7xfzen3ayb.fsf@ruckus.brouhaha.com>
	<40005e17$0$6084$ba620e4c@news.skynet.be>
Message-ID: <40007ec6$0$7527$3a628fcd@reader2.nntp.hccnet.nl>

"broebel" <computer.problemen at skynet.be> wrote:

>If you look at this as a homework or not is of no interest to me but I like
>the way you explained which way to go to find the resolution.
>thanks (i solved it in a jiffy now)

Now that it is solved it's fair game for anyone :-) I have no
information whether this is homework for you or not, and posting in a
public newsgroup defeats cheating.

Anton

def split(units,coins):
    for c in coins :
        n, units = divmod(units, c)
        if n: yield c, n
        if not units: raise StopIteration
    raise ValueError, 'no change!'

def test():
    coins = [200,100,50,20,10,5,2,1]
    for i in range(501):
        D = dict(split(i,coins))
        nc = sum(D.values())
        check = sum([c*n for c,n in D.items()])
        print "%3i: %i coins:"  %(i,nc) , D
        assert check == i

if __name__=='__main__':
    test()


From francisgavila at yahoo.com  Sat Jan 10 11:15:49 2004
From: francisgavila at yahoo.com (Francis Avila)
Date: Sat, 10 Jan 2004 11:15:49 -0500
Subject: python newbie
References: <3ffddcfd$0$16662$ba620e4c@news.skynet.be>
	<5unrvv8u1vpske1j464epj4aff0f54k2nf@4ax.com>
	<UilLb.1570$nt4.1692@attbi_s51>
	<gLrLb.5136380$Of.812373@news.easynews.com>
	<3fff1245@usenet01.boi.hp.com>
	<400018e8$0$294$ba620e4c@news.skynet.be>
Message-ID: <10009bujbbsn8b5@corp.supernews.com>


broebel wrote in message <400018e8$0$294$ba620e4c at news.skynet.be>...
>Just like you don't speak dutch, I don't write python (that's a good reason
>to learn, isn't it) so I'm not trying out your proposal to see wheather it
>works or not.
>I kept it aside to check as soon as I understand more of the language. So
>thanks any way.
>btw is there a special reason why someone should speak dutch to programm in
>python.?
>

Guido van Rossum created Python, and is currently its BDFL (Benevolent
Dictator For Life).  He's Dutch.  It's a sort of an inside joke that Python
makes sense if you're dutch (type 'import this' into an interactive Python
prompt).
--
Francis Avila



From fowlertrainer at anonym.hu  Fri Jan  9 10:29:39 2004
From: fowlertrainer at anonym.hu (fowlertrainer at anonym.hu)
Date: Fri, 9 Jan 2004 16:29:39 +0100
Subject: How to globalize vars ???
Message-ID: <6128860589.20040109162939@anonym.hu>

Hello !

I have get a strange problem in mod_python site.
More modules I have, and think, to I initialize my Session handler
from main module.

Like this:

-- main --

import BHASession

# Session info
BHASessionDir="C:/bhaweb/sessions"
BHASession.SSInit(BHASessionDir)

-- Session --
SSDefaultDir="c:/bhaweb/sessions"
SSLockObj=threading.Lock()

def SSLock():
    SSLockObj.acquire()

def SSUnlock():
    SSLockObj.release()

def SSInit(SessionDir):
    SSLock()
    try:
      if SSDefaultDir.strip()=="":
#       <-
# UnboundLocalError: local variable 'SSDefaultDir' referenced before assignment
         SSDefaultDir=SessionDir
    finally:
      SSUnlock()

--------------
      
When I not use SSInit, only I write the global variable in BHASession
module like this:

SSDefaultDir="c:/bhaweb/sessions"

then it is working good !!!

Why ? How to force python to module see his variable ?

Thanx for any advance  !

-- 
Best regards,
 fowlertrainer                          mailto:fowlertrainer at anonym.hu




From grey at despair.dmiyu.org  Fri Jan 23 16:23:34 2004
From: grey at despair.dmiyu.org (Steve Lamb)
Date: Fri, 23 Jan 2004 21:23:34 -0000
Subject: [OPINION] - does language really matter if they all do the same
	thing?
References: <20040123183127.GA35281@mail.hitmedia.com>
	<mailman.708.1074883454.12720.python-list@python.org>
Message-ID: <slrnc1346m.43q.grey@dmiyu.org>

On 2004-01-23, Jonathan Daugherty <cygnus at cprogrammer.org> wrote:
> On a more conjectural note, spoken languages are more than just ways of
> expressing ideas; by virtue of being evolving systems of communication, they
> serve as an insight into the culture and people that developed them.
> Programming languages are the same in that respect.

    Which is a rather interesting statement as quite a few people who study
languages tend to ignore or discount certain languages because they are
artifical (Esperanto, for example).  :)

-- 
         Steve C. Lamb         | I'm your priest, I'm your shrink, I'm your
       PGP Key: 8B6E99C5       | main connection to the switchboard of souls.
-------------------------------+---------------------------------------------


From gandalf at geochemsource.com  Mon Jan 19 02:09:54 2004
From: gandalf at geochemsource.com (Gandalf)
Date: Mon, 19 Jan 2004 08:09:54 +0100
Subject: secure unpickle?
References: <bufkot$96vl$1@netnews.upenn.edu>
Message-ID: <400B82C2.8080800@geochemsource.com>



>Hi, I'm looking for a way in unpickling, or equivalent, such that can only
>unpickle (or is limited to) simple data structure, such as number, string,
>list, tuples.
>
>The doc I found http://www.python.org/doc/2.2.3/lib/pickle-sec.html was
>helpful but still not very clear to me.
>
>Thanks!
>
>-Y
>
>  
>
I'm using this module (based on the documentation you mentioned):

import cStringIO
import cPickle

def dumps(obj):
    """Dumps an object into a string.
   
    @param obj: The object to dump. It should not be a user defined 
object nor a global.
        It should only contain built-in types. (Will not raise an 
exception anyway.)
    @return: The dumped object as a string.
    """
    f = cStringIO.StringIO()
    p = cPickle.Pickler(f,1)
    p.dump(obj)
    return f.getvalue()

def loads(s):
    """Loads an object from a string.
   
    @param s: The string to load the object from.
    @return: The object loaded from the string. This function will not 
unpickle globals and instances.
    """
    f = cStringIO.StringIO(s)
    p = cPickle.Unpickler(f)
    p.find_global = None
    return p.load()





From jcarlson at nospam.uci.edu  Fri Jan 23 03:48:28 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Fri, 23 Jan 2004 00:48:28 -0800
Subject: Batch commands on Windows
In-Reply-To: <7A3Qb.4870$AK2.3953@newssvr29.news.prodigy.com>
References: <7A3Qb.4870$AK2.3953@newssvr29.news.prodigy.com>
Message-ID: <buqn8o$115$1@news.service.uci.edu>

> So, after reading some messages about os.system, and looking at the popen
> stuff and trying it a bit, I still have not found a way to keep a command
> window open for several commands (on Windows 2000/XP), while seeing the
> normal output in a command window.  All I want to do is do what a batch file
> does, but I want to actually have functions and associative arrays and all
> the other niceties of python.

Q: "How do I get python to run these other things, and keep the window 
open so that I can see their output?"

A: Making sure to run your script with the console version of Python 
(python.exe, NOT pythonw.exe):

#insert the body of your script here

raw_input("press enter to continue...");
# or even
#os.system('pause');


Q: "I'm running the non-console version of Python, how do I capture the 
output of my scripts so that I can do something with it afterwards?"

A: I'll answer this one tomorrow, it is getting late.

  - Josiah


From jjl at pobox.com  Wed Jan 14 21:24:08 2004
From: jjl at pobox.com (John J. Lee)
Date: 15 Jan 2004 02:24:08 +0000
Subject: I come not to bury C++, but to praise it...
References: <mailman.337.1074032524.12720.python-list@python.org>
	<bu1uul$cam92$1@ID-46268.news.uni-berlin.de>
	<cu%Mb.47396$8H.99443@attbi_s03>
	<bu3khe$dbm5v$1@ID-46268.news.uni-berlin.de>
	<100aq779r2h2c9e@corp.supernews.com>
	<bu3vku$den0t$1@ID-46268.news.uni-berlin.de>
Message-ID: <8765ferltj.fsf@pobox.com>

"Derek" <none at none.com> writes:
[...]
> Yes, I prefer compile-time checks to run-time checks.  I don't know
> which method is "better" by any objective measure, but I prefer to
> know if there is a problem as early as possible.  It's not hard to

It would certainly be better if Python had some kind of optional
static type checking (though that seems unlikely to happen).  Many
people (eg. Alex Martelli in this group) have argued that requiring
*everything* to be statically checked is harmful because of the cost
it imposes in terms of inflexibility and lines of code.


> make a change in Python that will go unnoticed until much later, and
> in the real world test suites often don't have enough coverage to
> catch every runtime error up front.

The argument runs like this: If you don't have near-100% test
coverage, you are missing many bugs that static typechecking will not
catch.  So don't do that (the fact that it's perfectly feasible to
have near-100% coverage, when given support from bosses where
relevant, has been repeatedly demonstrated recently).  OTOH, if you do
have 100% coverage, the set of bugs that *are* caught by the static
typechecks, but *not* by the tests is usually very small, in practice.
So, you can catch bugs by introducing static checks, but you introduce
*even more* bugs (so the argument runs) if you pay the cost (see
above) of static checking for *everything*, as you must in C++.  So,
though Python beats C++ here, the even-happier medium is achieved with
systems like the static type-inference of ML and Haskell.  Whether
this argument holds in general is hard to answer, but in the
particular case of C++ and Python, I find it extremely persuasive.


John


From NAVMSE-MAIL at fisherisland.com  Wed Jan 28 10:10:47 2004
From: NAVMSE-MAIL at fisherisland.com (NAVMSE-MAIL)
Date: Wed, 28 Jan 2004 10:10:47 -0500
Subject: Norton AntiVirus detected a virus in a message you sent. The
	infected attachment was deleted.
Message-ID: <4E4869025E6E7A4DA67978DC08DC1D89DACD2A@mail.fisherisland.com>

Recipient of the infected attachment:  MAIL, First Storage Group\Mailbox Store (MAIL), Liz Martinez/Inbox
Subject of the message:  Test
One or more attachments were deleted
Your email address will be blocked to this server!!!!
Thank you,
FISHER ISLAND IT DEPT.
  Attachment document.zip was Deleted for the following reasons:
    Virus W32.Novarg.A at mm was found.
    Virus W32.Novarg.A at mm was found in document.txt                                                                      .scr.




From peter at engcorp.com  Fri Jan  9 09:44:18 2004
From: peter at engcorp.com (Peter Hansen)
Date: Fri, 09 Jan 2004 09:44:18 -0500
Subject: Twisted or Medusa or Zope
References: <425cc8d1.0401070808.14690325@posting.google.com>
	<y11Lb.1333$Mb5.23891@news2.e.nsc.no> <3FFD7159.55630AE0@engcorp.com>
	<6AlLb.134$hd.7718@news2.e.nsc.no> <3FFEB6D6.BF92551E@engcorp.com>
	<+vXesJAXsr$$EwJL@jessikat.fsnet.co.uk>
Message-ID: <3FFEBE42.80962511@engcorp.com>

Robin Becker wrote:
> 
> In article <3FFEB6D6.BF92551E at engcorp.com>, Peter Hansen
> <peter at engcorp.com> writes
> ..
> ...
> >enlighten me.
> >
> >Thomas, you're completely ON track here... I just wanted to emphasize that
> >Twisted is much more polished and sophisticated.  I'd even have to say,
> >as a programmer using them, that Twisted does actually provide a simpler and
> >cleaner API.  It and Medusa are much closer in concept than either is to
> >Zope, though, as you say.
> >
> In another thread http://snakelets.sf.org was mentioned.

I get at least a temporary "server not found" error when I try that name.

In any case, anything added on top of Twisted and Medusa are, of course,
not Twisted and Medusa.  Zope is added on top of Medusa, and doubtless there
are and will be many things added on top of Twisted, some of which may
be similar in purpose to Zope (specifically, content-management systems
rather than just frameworks for application writing).

-Peter


From hgeldenhuys at gims.com  Fri Jan 23 03:44:34 2004
From: hgeldenhuys at gims.com (Herman Geldenhuys)
Date: Fri, 23 Jan 2004 10:44:34 +0200
Subject: Modem beeping
Message-ID: <001c01c3e18d$260b02c0$b10d10ac@metasalio>


I am dialing a modem(COM3) from python on windoze and I connect successfully to a remote phone, but there is an annoying beeping sound that keeps on ringing in the background. Would anybody happen to know what command and in what sequence I should send to the modem to make it stop?

Thanks

H



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From SBrunning at trisystems.co.uk  Tue Jan  6 11:44:19 2004
From: SBrunning at trisystems.co.uk (SBrunning at trisystems.co.uk)
Date: Tue, 6 Jan 2004 16:44:19 -0000 
Subject: Why does this fail?
Message-ID: <31575A892FF6D1118F5800600846864D01200E1E@intrepid>

> From:	Skip Montanaro [SMTP:skip at pobox.com]
> A possible addition to your "Embedded script is messing up my
> web-scraping"
> section:  Wasn't there mention of the Mozilla project's standalone
> JavaScript interpreter (don't remember what it's called) recently
> alongside
> some Python interface?
 
Yup - see http://simon.incutio.com/archive/2003/12/29/seamonkey.

Cheers,
Simon Brunning,
http://www.brunningonline.net/simon/blog/
-LongSig




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From cygnus at cprogrammer.org  Sun Jan 25 09:34:39 2004
From: cygnus at cprogrammer.org (Jonathan Daugherty)
Date: Sun, 25 Jan 2004 09:34:39 -0500
Subject: [OPINION] - does language really matter if they all do the same
	thing?
In-Reply-To: <6ee58e07.0401250521.2e26e370@posting.google.com>
References: <20040123183127.GA35281@mail.hitmedia.com>
	<mailman.708.1074883454.12720.python-list@python.org>
	<6ee58e07.0401250521.2e26e370@posting.google.com>
Message-ID: <20040125143439.GA19693@mail.theserver.ath.cx>

# > that english and arabic are, in the same sense, just two sides
# > of the same coin, which is a gross oversimplification of the
# > matter and a disrespect to the qualities of the languages
# 
# english and arabic are quite equal. compare it with tonal asian
# languages then you find some real difference. For example in the thai
# language there is no word that means "No", you can only politely deny
# "yes". This is mental difference.

Either you are a troll or you have missed the point entirely. :)

-- 

  Jonathan Daugherty
  http://www.cprogrammer.org

  "It's a book about a Spanish guy called Manual, you should read it."
                                                            -- Dilbert



From LittleDanEhren at yahoo.com  Fri Jan 30 20:10:16 2004
From: LittleDanEhren at yahoo.com (Daniel Ehrenberg)
Date: 30 Jan 2004 17:10:16 -0800
Subject: Python vs. Io
References: <711c7390.0401291301.3f95794@posting.google.com>
	<qnkfzdyieg0.fsf@arbutus.physics.mcmaster.ca>
Message-ID: <711c7390.0401301710.4353274@posting.google.com>

> Hey, if I wanted to to, I could add functions and all that that would
> make Python look like Lisp, or IO, or whatever.
> 
> But, why? If I wanted to write Lisp or Io, I'd use those.
> 
> Your example I'd write in Python as
> 
> for key, value in dict(x=1, y=2, z=3):
>     print '%s: %s\n" % (key, value)
> 
> I didn't have to write 43 lines of support code, and it's also two
> lines. I don't think "this isn't builtin" is a selling point -- you
> need a critical mass of builtins to make a language useful.

I know. Maybe in the future, it can be builtin, but it just shows how
flexible Io is. Io has its own version of a for loop (in addition to
being able to iterate directly over a dictionary or list) which in
some cases makes more sense than Python's. It's like this:

for(x, 1, 10, #goes through x with values 1-10
    write(x, "\n")
)

IMHO, this makes more sense than iterating over a list created just
for a specific loop. On my computer, Io's loops are faster than
Python's (probably because they are lazy).

>> [stuff about size of communities and bindings to stuff]
> 
> Yep. That's a *big* difference, I'd say.

But the community will grow larger in time. The Io community is bigger
than the Python community two years after Python was released
(although that's probably because it wasn't publicly released for two
years).
> 
> Can you elaborate a bit on why Python is inflexible? I find Python to
> be extremely flexible.

There's still a difference between types and classes in Python. Try
this in Python:

>>> x = object()
>>> x.number = 5

It raises an error. But the same thing in Io works (which is x :=
Object clone; x number := 5). To do it in Python, you have to do

>>> class goodObject(object): pass
>>> x = goodObject()
>>> x.number = 5

Also, Python has statements (as opposed to just expressions) even for
the simplest things like writing things to the command line. In Io,
flow control is in functions, which can be overwritten if you want to
change them. The Python philosophy is that if you allow this and other
flexible things to happen, you will have inconsistent code. If someone
asks on the Tutor mailing list how to change that, everybody responds
"Why would you want to do that?". While that's a valid viewpoint, it's
not the most flexible.
> 
> Python is 14 years old, and it's still working on global domination;
> Io's got some catching up to do :-)

I don't think world domination is a practical goal for either
language.

Daniel Ehrenberg


From francisgavila at yahoo.com  Fri Jan 23 04:37:38 2004
From: francisgavila at yahoo.com (Francis Avila)
Date: Fri, 23 Jan 2004 04:37:38 -0500
Subject: private class members and hasattr
References: <mailman.677.1074846642.12720.python-list@python.org>
Message-ID: <1011qtlk906t9d1@corp.supernews.com>

Dragos Chirila wrote in message ...

>Why hasattr method doesn't return 1(true) for private member '__prop3' ??

Because that's how private members work.  See "5.2.1 Identifiers (Names)" in
the Python Language Reference.

>>> class PropTest:
...     def __init__(self):
...         self.__prop3 = 3
...     def testprops(self):
...         print hasattr(self, '__prop3')
...         print hasattr(self, '_PropTest__prop3')
...
>>> dir(PropTest())
['_PropTest__prop3', '__doc__', '__init__', '__module__', 'testprops']
>>> PropTest().testprops()
False
True
>>>

You're probably better off not using private members anyway.
--
Francis Avila



From vincent at visualtrans.de  Wed Jan  7 02:03:50 2004
From: vincent at visualtrans.de (vincent wehren)
Date: Wed, 7 Jan 2004 08:03:50 +0100
Subject: Finaly found a simple enough task for python, took the plunge,
	but.....
References: <3FFB5312.1030803@connection.com>
	<btfao2$i19$1@news2.tilbu1.nb.home.nl>
	<3FFB8071.9070107@connection.com>
	<afomvvgeti8q3bapj6bumhkmdikgqnf230@4ax.com>
	<3FFBA228.7070403@connection.com>
Message-ID: <btgb0k$lhv$1@news4.tilbu1.nb.home.nl>

"Sambo" <samirw at connection.com> schrieb im Newsbeitrag
news:3FFBA228.7070403 at connection.com...
| Well, I was hopeful but no luck under w2000 and python 2.3.3
| The window is just as obscured as under w95
| Must be p2.3.3, oh well 9Mb of junk, good think I upgraded to UNLIMITED
access,
| hehe.

The example should work absolutely fine on 2.3.3 - which is what I am
running. So there's someting at your end that is causing this. How do you
invoke the script? Have you tried invoking the script directly from the
command line?
Vincent

|
| Ciao.
|
|
| engsolnom at ipns.com wrote:
|
| > (top posting..sorry)
| >
| > I tried  Vincent's suggested code and it works just fine with Win2000,
Python2.3.
| > I did change the code to return the path to a selected file, rather than
just a directory.
| > Shows the value of the newsgroups...I was unaware (of course us newbies
are unaware of lots of
| > things) of tkFileDialog...and was about to write a tk interface to do
the same thing. Saved a ton of
| > time, and probably newsgroup bandwidth.
| > Thanks, Vincent!
|




From brian at sweetapp.com  Tue Jan 27 18:10:55 2004
From: brian at sweetapp.com (Brian Quinlan)
Date: Tue, 27 Jan 2004 15:10:55 -0800
Subject: map float string '0.0' puzzle
In-Reply-To: <bv6ovb$c2q$1@boulder.noaa.gov>
Message-ID: <060101c3e52a$d16f5f30$0000fea9@dell8200>

> >>> row = ('0.0', '1.0', None)
> >>> map(lambda setting: setting and float(setting) or None, row)
 
> Specifically, why is the return value of the first map operation:
> [None, 1.0, None]
> 
> I was expecting:
> [0.0, 1.0, None]

Can you explain why you were expecting that? The expression is:

[('0.0' and 0.0) or None, ('1.0' and 1.0) or None, (None and ?) or None)]
             ^ False              ^ True             ^ False     


You can look at and/or like this (except that function calls don't do
short-circuit evaluation):

def and(*args):
    for a in args:
         if not a:
             return a
    return args[-1]

def or(*args):
    for a in args:
        if a:
            return a
    return args[-1]

So you have:

or(and(settings, float(setting)), None)

Cheers,
Brian




From jepler at unpythonic.net  Mon Jan 26 10:41:31 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Mon, 26 Jan 2004 09:41:31 -0600
Subject: need something like threads, or just multiple simulateous exec's
In-Reply-To: <bv3b0k$a0j$1@news.service.uci.edu>
References: <sdq2vb.h8h.ln@energy.uch.net> <bv3b0k$a0j$1@news.service.uci.edu>
Message-ID: <20040126154131.GA19863@unpythonic.net>

I'm not sure why you need to use threads here.  popen()ed processes
execute asynchronously, blocking when they create enough unread output.
In this case, they'll generate very little output.  Why not try this?

# Create all processes at once
pipes = [os.popen(...) for ip in hosts]

# Read their output
output = [pipe.read for pipe in pipes]

Suppose you decide you want to run only N os.popen()s at a time.  Here
you'll want to use select() instead of threads.  Something like this:

remaining_hosts = hosts[:]
pipes = []
output = []
for i in range(nthreads):
while remaining_hosts or pipes:
	while remaining_hosts and len(pipes) < npipes:
		host = remaining_hosts.pop()
		pipes.append(os.popen(...))
	ready = select.select([pipes], [], [])[0]
	for pipe in ready:
		# Assuming output arrives all at once
		# (it should since it's one line)
		output.append(pipe.read())
		pipes.remove(pipe)
		pipe.close()

Jeff



From Florian.Lindner at xgm.de  Sun Jan  4 15:49:30 2004
From: Florian.Lindner at xgm.de (Florian Lindner)
Date: Sun, 04 Jan 2004 21:49:30 +0100
Subject: Problems compiling python
Message-ID: <bt9u1m$ek3$05$1@news.t-online.com>

Hello,
I want to compile that small python script:

bastet:/ # cat test.py
#!/usr/bin/python
import sys, os
username = os.getlogin()
print username
os.spawnv(os.P_WAIT, "/root/mailboxmgm.py", sys.argv)

Python 2.3.2 (#1, Oct 12 2003, 14:27:24)
[GCC 3.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import py_compile
>>> py_compile.compile("test.py")
>>>
bastet:/ # chmod u+x test.pyc
bastet:/ # ./test.pyc
./test.pyc: line 1: syntax error near unexpected token `;'
'/test.pyc: line 1: `;?
bastet:/ #

What is wrong?

Thanks,
Florian


From jcarlson at nospam.uci.edu  Fri Jan 23 14:55:04 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Fri, 23 Jan 2004 11:55:04 -0800
Subject: Ordered dictionary?
In-Reply-To: <b_aQb.175158$_P.6157882@news4.tin.it>
References: <leWPb.231$af7.162835@newshog.newsread.com><f7XPb.9179$7D.3428@fe2.texas.rr.com><slrnc11piq.etj.apardon@trout.vub.ac.be>
	<mailman.680.1074850984.12720.python-list@python.org>
	<b_aQb.175158$_P.6157882@news4.tin.it>
Message-ID: <burual$t7d$2@news.service.uci.edu>

Carmine Moleti wrote:

> Hi Dragos,
> 
> 
>>def filterList(p_list, p_value):
>>    l_len = len(p_list)
>>    l_temp = map(None, (p_value,)*l_len, p_list)
>>    l_temp = filter(lambda x: x[1].find(x[0])==0, l_temp)
>>    return map(operator.getitem, l_temp, (-1,)*len(l_temp))
> 
> 
>>phones_dict = {'jansen' : '0000', 'xxx' : '1111', 'jan2' : '2222'}
>>names_list = filterList(phones_dict.keys(), 'jan')
>>phones_list = map(phones_dict.get, names_list)
> 
> 
>>This extracts from the dictionary the telephone(values) numbers for
>>names(keys) starting with 'jan'...
> 
> 
> Why you didn't used the string.startswith(...) method?
> 
> I wrote this:
> 
> d={'carmine':'123456','carmela':'4948399','pippo':'39938303'}
> for name,number in d.items():
>     if name.startswith('car'):
>         print name,number
> 
> This also extract from the dictionay all the (name,number) pairs whose
> name starts with a given substring ('car' in the example).
> 
> Thanks for your answer

Something strange is that for short 'other' strings
string[:len(other)] == other
#is faster than
string.startswith(other)

Maybe find is faster than startswith.

  - Josiah


From moskow23 at yahoo.com  Sun Jan 18 23:47:22 2004
From: moskow23 at yahoo.com (Dan)
Date: 18 Jan 2004 20:47:22 -0800
Subject: Determining a replacement dictionary from scratch
References: <4b805376.0401181116.3b0adb41@posting.google.com>
Message-ID: <4b805376.0401182047.434af5d6@posting.google.com>

Brilliant, thank you all for your help.

-Dan


From aahz at pythoncraft.com  Mon Jan  5 14:53:37 2004
From: aahz at pythoncraft.com (Aahz)
Date: 5 Jan 2004 14:53:37 -0500
Subject: Optimized quoting (was Re: Speed?)
References: <5.2.0.9.0.20040102221218.00b7c870@mail.zomething.com>
	<mailman.43.1073115353.12720.python-list@python.org>
	<bt6muh$bog$1@panix3.panix.com>
	<m3brpi72rb.fsf@pc150.maths.bris.ac.uk>
Message-ID: <btcfc1$49e$1@panix3.panix.com>

In article <m3brpi72rb.fsf at pc150.maths.bris.ac.uk>,
Michael Hudson  <mwh at python.net> wrote:
>aahz at pythoncraft.com (Aahz) writes:
>> In article <mailman.43.1073115353.12720.python-list at python.org>,
>> John Hunter  <jdhunter at ace.bsd.uchicago.edu> wrote:
>>>
>>>Donald Knuth, God of Computer Science, said "Premature optimization is
>>>the root of all evil".  
>> 
>> If Knuth is God, then Hoare is God's father:
>> 
>> "Premature optimization is the root of all evil in programming."
>> --C.A.R. Hoare (often misattributed to Knuth, who was himself quoting Hoare)
>
>Cite?

http://www.haskell.org/pipermail/haskell-cafe/2001-January/001461.html

Anybody have a copy of _Literate Programming_ to check?
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

A: No.
Q: Is top-posting okay?


From miki.tebeka at zoran.com  Sun Jan 25 11:55:23 2004
From: miki.tebeka at zoran.com (Miki Tebeka)
Date: 25 Jan 2004 08:55:23 -0800
Subject: Changing endian format
References: <mailman.731.1074956182.12720.python-list@python.org>
Message-ID: <4f0a9fdb.0401250855.1620b1a3@posting.google.com>

Hell Amit,

> I have a binary file and i need to change the endian format..little to big as 
> well as vice versa..could anyone help me out.
Warning: Not tested!

#!/usr/bin/env python
from sys import argv
from array import array

a = array("H", open(argv[1], "rb").read())
a.byteswap()
open(argv[2], "wb").write(a.tostring())

HTH.
Miki


From jepler at unpythonic.net  Wed Jan 14 17:07:25 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Wed, 14 Jan 2004 16:07:25 -0600
Subject: C++ bad-mouthing (was: Why learn Python ??)
In-Reply-To: <878yka2sze.fsf@pobox.com>
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<7xisjh1e3i.fsf@ruckus.brouhaha.com>
	<10064loqc7sd7e3@corp.supernews.com>
	<7xeku496wx.fsf@ruckus.brouhaha.com>
	<donn-9D2291.16343412012004@nntp6.u.washington.edu>
	<7xhdz08xgy.fsf@ruckus.brouhaha.com> <1073978329.887910@yasure>
	<87brp7agl7.fsf@pobox.com> <7xvfnfmzy8.fsf@ruckus.brouhaha.com>
	<878yka2sze.fsf@pobox.com>
Message-ID: <20040114220725.GC17742@unpythonic.net>

On Wed, Jan 14, 2004 at 08:08:37PM +0000, John J. Lee wrote:
> according to pycount.py run on the old version of Twisted that's
> sitting on my hard drive -- again, it seems to spit out multiple total
> lines, so I hope it's working right...!

"find | xargs foo" can invoke foo multiple times.  linux has a
surprisingly small upper bound on commandline length, on the order of
a 128k, and xargs is probably more conserative than that.

>>> os.system("/bin/true " + "x" * 129000)
0
>>> os.system("/bin/true " + "x" * 130000)
32512

Jeff



From rainerd at eldwood.com  Wed Jan 28 14:50:17 2004
From: rainerd at eldwood.com (Rainer Deyke)
Date: Wed, 28 Jan 2004 19:50:17 GMT
Subject: isinstance() bug
References: <20040128132225.GA10842@foof.i3.cz><16407.54576.283608.505067@montanaro.dyndns.org>
	<mailman.925.1075304492.12720.python-list@python.org>
Message-ID: <ZnURb.45568$U%5.239709@attbi_s03>

Michal Vitecek wrote:
>  it's my belief that if i'm instantiating a class from the same
>  location no matter how i imported its definition, its instances are
>  always of the same class.

Your belief is incorrect.  'package.module.A' and 'module.A' are distinct
classes.  Modifications to one do not show up in the other.  If 'isinstance'
reported that an instance of 'package.module.A' is an instance of
'module.A', 'isinstance' would be broken and unusable.


-- 
Rainer Deyke - rainerd at eldwood.com - http://eldwood.com




From support at alcanet.com.au  Fri Jan 30 19:55:01 2004
From: support at alcanet.com.au (support at alcanet.com.au)
Date: Sat, 31 Jan 2004 11:55:01 +1100
Subject: ALCATEL POLICY : your message has been refused
Message-ID: <200401310055.i0V0t1Hq005754@mailgate.alcanet.com.au>

******************** e-mail Manager Notification ********************** 

As a security precaution this mail was blocked and discarded since it
contains attachments with file extensions not allowed by our email policy
(.exe, .vbs etc ...)


Source mailbox : <python-list at python.org>
Destination mailbox : <james at alcatel.com.au>
Message Subject : Hello
Attachment: application/octet-stream;   name="eekdco.pif"  
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From jjl at pobox.com  Sat Jan 31 15:20:05 2004
From: jjl at pobox.com (John J. Lee)
Date: 31 Jan 2004 20:20:05 +0000
Subject: Simple web proxy - help needed
References: <c335e460.0401310918.49361638@posting.google.com>
Message-ID: <87ektfkgzu.fsf@pobox.com>

forshtat at hotmail.com (Ziv Forshtat) writes:
[...]
> Problem is - I don't have to much background in writing proxies, nor
> in writing plugins.
[...]

Plugins:

For MSIE, all the docs are on MSDN.  Try a Google search for "MSDN
reusing webbrowser control".  Get Hammond and Robinson's book on
Python & win32.

For Konqueror, start here:

http://www.boddie.org.uk/david/Projects/Python/KDE/

http://www.boddie.org.uk/david/Projects/Python/KDE/Docs/

Warning: plugin support for PyKDE is quite new.

For Mozilla, MozPython might set you off in the right direction.
Building PyXPCOM is a pain.  BTW, Mozilla doesn't seem to want to
build on Debian woody, so don't do that.  Read the installation
instructions for the MozPython & PyXPCOM binaries on that page
carefully (so as not to piss off Thomas when you get it wrong ;-)

http://www.thomas-schilz.de/MozPython/README.html


(BTW, you're probably NOT interested in "Netscape plugins")


John


From skip at pobox.com  Thu Jan 15 10:04:28 2004
From: skip at pobox.com (Skip Montanaro)
Date: Thu, 15 Jan 2004 09:04:28 -0600
Subject: Why gmp is not in the standard library?
In-Reply-To: <4f0a9fdb.0401150211.615a7f45@posting.google.com>
References: <4f0a9fdb.0401150211.615a7f45@posting.google.com>
Message-ID: <16390.44028.327189.842557@montanaro.dyndns.org>


    Miki> Which made me think why Python don't use gmp as it's primary math
    Miki> package - we'll get fast results, a lot of number types and much
    Miki> more.

    Miki> Can't think of any reason why Python is implementing its own long
    Miki> numbers...  Can you enlighten me?

In addition to the reasons Michael Hudson provided, I'll add:

    * Python's native longs have been around much longer than gmpy, perhaps
      even predating gmp itself.

    * Converting from Python's longs to gmpy would probably be at least a
      moderately nontrivial undertaking.

Skip



From skip at pobox.com  Sat Jan 10 13:26:09 2004
From: skip at pobox.com (Skip Montanaro)
Date: Sat, 10 Jan 2004 12:26:09 -0600
Subject: module for parsing email Received headers?
In-Reply-To: <ef08387c.0401092050.79564328@posting.google.com>
References: <ef08387c.0401092050.79564328@posting.google.com>
Message-ID: <16384.17345.19471.709420@montanaro.dyndns.org>


    forte> Does anyone know the existence of such module? I bet 90% of the
    forte> chance that the wheel was invented before. Thanks!

No module, but SpamBayes has some regex hacks in its tokenizer to pull out
interesting bits of Received: headers.

Skip



From andy47 at halfcooked.com  Tue Jan 13 10:47:21 2004
From: andy47 at halfcooked.com (Andy Todd)
Date: Tue, 13 Jan 2004 15:47:21 +0000
Subject: id3v2 module
In-Reply-To: <pan.2004.01.13.09.12.39.813880@beeznest.NOSPAM.net>
References: <pan.2004.01.13.09.12.39.813880@beeznest.NOSPAM.net>
Message-ID: <bu146p$ttc$1@sea.gmane.org>

Dusausoy Bruno wrote:

> Hi,
> 
> I'd like to know if there is a third-party module for reading/writing
> id3v2 informations.
> Thanks 

http://www.nedbatchelder.com/code/modules/id3reader.html

Regards,
Andy
-- 
--------------------------------------------------------------------------------
 From the desk of Andrew J Todd esq - http://www.halfcooked.com/




From me at here.there.com  Wed Jan 14 16:50:44 2004
From: me at here.there.com (Peter Ashford)
Date: Thu, 15 Jan 2004 10:50:44 +1300
Subject: ProtoCiv: porting Freeciv to Python CANNED
In-Reply-To: <bu4cdk$cv09p$1@ID-207230.news.uni-berlin.de>
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
	<K_YMb.10994$9k7.204413@news.xtra.co.nz>
	<bu1qq3$cu440$1@ID-207230.news.uni-berlin.de>
	<n22Nb.11299$9k7.210522@news.xtra.co.nz>
	<bu2pgs$d123a$1@ID-207230.news.uni-berlin.de>
	<4004EC9E.1E2E2893@alcyone.com>
	<23891c90.0401140223.344b22af@posting.google.com>
	<100bbb6kj9m03a4@corp.supernews.com>
	<bu4cdk$cv09p$1@ID-207230.news.uni-berlin.de>
Message-ID: <TQiNb.12052$9k7.227216@news.xtra.co.nz>


>>>>There are plenty of things you can get out of starting, getting
> 
> involved
> 
>>>>with, and approaching open source projects.  A legion of personal
>>>>servants is not going to be one of them, and only a crass idiot would
>>>>think otherwise.
>>>
>>>As far as I've been able to discover, life is just one long cocktail
>>>party in Brandon's honour. So it isn't exactly surprising that
>>>everyone appears to him as just another waiter with a tray of drinks.
> 
> 
> Is there something fundamentally *wrong* with recognizing how useless people
> are to your purposes?

*Recognising* that people aren't useful for your purposes is sensible. 
*Criticising* people for not being useful for your purposes when they've 
never claimed or aspired to be is dumb.



From dietrich at zdome.net  Sun Jan 25 18:47:25 2004
From: dietrich at zdome.net (Dietrich Epp)
Date: Sun, 25 Jan 2004 15:47:25 -0800
Subject: [OPINION] - does language really matter if they all
	dothe	samething?
In-Reply-To: <buua42$vop$1@sea.gmane.org>
References: <69A0D4AB81C51447AD6BA387782B8D64093D8A@midl-mail4.etcconnect.com><028FD9F0-4E01-11D8-BB78-0003934ACDEC@zdome.net><4011C497.1040302@prescod.net>
	<58587302-4E30-11D8-8FAB-0003934ACDEC@zdome.net>
	<buua42$vop$1@sea.gmane.org>
Message-ID: <D3AD8358-4F90-11D8-BCE5-0003934ACDEC@zdome.net>


On Jan 24, 2004, at 9:30 AM, Terry Reedy wrote:

> I slightly prefer my Python version, but I suspect you will not, so you
> remain safe.

You prefer infinite recursion?  Thank you, but I like my functions to 
return once in a while.




From okyoon at stanford.edu  Thu Jan  1 20:54:27 2004
From: okyoon at stanford.edu (Oh Kyu Yoon)
Date: Thu, 1 Jan 2004 17:54:27 -0800
Subject: Graph in wxPython
References: <bt04a4$2e3$1@news.Stanford.EDU>
Message-ID: <bt2j0l$79q$1@news.Stanford.EDU>

Thank you all.
You guys have been very helpful.





From cygnus at cprogrammer.org  Wed Jan 21 16:01:42 2004
From: cygnus at cprogrammer.org (Jonathan Daugherty)
Date: Wed, 21 Jan 2004 16:01:42 -0500
Subject: Need help with Python class idioms
In-Reply-To: <200401212101.33605.james@logicalprogression.net>
References: <f5c5dc88.0401211243.7e81a26b@posting.google.com>
	<200401212051.50411.james@logicalprogression.net>
	<200401212101.33605.james@logicalprogression.net>
Message-ID: <20040121210142.GA27469@mail.theserver.ath.cx>

# P.S. Since you're asking about idiom, it would be more Pythonic to write:
# 
#     if self.mandatoryVar1 is None:
# 
# using the identity test "is" rather than equality test "==", since there is 
# only one None.

I'd write

  if not self.mandatoryVar1:

but the first method works, too.

-- 

  Jonathan Daugherty
  http://www.cprogrammer.org

  "It's a book about a Spanish guy called Manual, you should read it."
                                                            -- Dilbert



From skip at pobox.com  Wed Jan 14 11:35:46 2004
From: skip at pobox.com (Skip Montanaro)
Date: Wed, 14 Jan 2004 10:35:46 -0600
Subject: Safe prime numbers in Python
In-Reply-To: <4005725d$1@nntp0.pdx.net>
References: <200401140639.i0E6dxt09128@mail001.syd.optusnet.com.au>
	<mailman.349.1074082578.12720.python-list@python.org>
	<4005725d$1@nntp0.pdx.net>
Message-ID: <16389.28642.425686.771599@montanaro.dyndns.org>


    >> Here's what I came up with using gmpy:
    ...

    Scott> I suspect it might be faster if you looked for the lower prime:

    Scott>      def safe_primes(last=1):
    Scott>          while True:
    Scott>              last = gmpy.next_prime(last)
    Scott>              other = last * 2 + 1
    Scott>              if gmpy.is_prime(other):
    Scott>                  yield other

Yes, you're right.  Starting at 2**1000 I found three safe primes quite
quickly.  Using my version I gave up waiting after seeing one safe prime
float by.

Note that the meaning of the last arg changes when converting to your
formulation.  Suppose I call safe_primes(2**1000).  In my formulation, last
identifies the smallest safe_prime I'm interested in.  In your formulation,
last identifies the smallest prime which defines a larger safe prime.  To
make them the same, your definition would have to change slightly:

    def safe_primes(last=1):
        last = long((last-1)/2)   # assuming future float division...
        while True:
            last = gmpy.next_prime(last)
            other = last * 2 + 1
            if gmpy.is_prime(other):
                yield other



From michi.goettsche at gmx.de  Thu Jan  1 08:45:40 2004
From: michi.goettsche at gmx.de (Michael_Goettsche)
Date: Thu, 1 Jan 2004 14:45:40 +0100
Subject: Uploading a file with ftplib
Message-ID: <200401011445.40820.michi.goettsche@gmx.de>

Hi all,

happy new year to all of you.

i'm trying to upload a file called "log.txt" with ftplib and tried the 
following:

Python 2.3.3 (#1, Dec 28 2003, 10:44:03)
[GCC 3.3.1 (SuSE Linux)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from ftplib import *
>>> ftp = FTP( "ftp.tuxipuxi.de" )
>>> ftp.login( "xxxxxx", "xxxxx" )
'230 Login successful.'
>>> #what now?

i've tried out different things for "what now",
for example:

ftp.storlines( "STOR log.txt", open( "log.txt", "r" ) )
fh = open( "log.txt", "r" )
ftp.storlines( "STOR log.txt", fh )
ftp.storbinary( "STOR log.txt", fh ) 

a file with size 0 is created on the server, but it's empty.
can anybody please tell me how to upload it properly?

thanks in advance,

regards,
Michael.





From gst at infrae.com  Thu Jan 15 06:16:50 2004
From: gst at infrae.com (Guido Goldstein)
Date: 15 Jan 2004 12:16:50 +0100
Subject: When I installed Silva-0.9.3 and restart Zope,
	I found  ImportError like this - cannot import name ExpatError -
References: <dea2ed57.0401131827.421d8a2c@posting.google.com>
Message-ID: <m265fdea1p.fsf@mail.a-nugget.de>


Hi!

On 13 Jan 2004 18:27:41 -0800
  jangseungwook at nate.com (jang, seungwook) wrote:
[...]
> ImportError: cannot import name ExpatError
> ------
[...]

First of all, you should have asked this on the silva mailinglist.
See
   http://lists.infrae.com/mailman/listinfo/silva-general

To come to your actual problem:
Please check if the python-xml package is installed and if so, if it's
fully installed.

HIH
  Guido G.
-- 
Infrae, Rotterdam, The Netherlands
http://www.infrae.com


From gerrit at nl.linux.org  Sun Jan  4 03:52:55 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Sun, 4 Jan 2004 09:52:55 +0100
Subject: Filename type (Was: Re: finding file size)
In-Reply-To: <3FF740ED.9020909@rogers.com>
References: <4V4Jb.12709$Vl6.2811218@news20.bellglobal.com>
	<bt3l9i$pog$07$3@news.t-online.com>
	<mailman.45.1073125105.12720.python-list@python.org>
	<bt6c23$c6u$07$1@news.t-online.com>
	<20040103165041.GA31412@nl.linux.org> <3FF740ED.9020909@rogers.com>
Message-ID: <20040104085255.GB13987@nl.linux.org>

[Peter Otten]
> >>I think both filename class and os.path functions can peacefully coexist.

[Gerrit Holl (me)]
> >Thanks for the links.
> >(I think they don't, by the way)

[Mike C. Fletcher]
> Is that peaceful?  I don't know.  If there's a war, let's be honest, 
> os.path is going to take a good long while to defeat because it's there 
> and embedded directly into thousands upon thousands of scripts and 
> applications.  We can fight a decent campaign, making a common module, 
> then getting it blessed into a standard module, encouraging newbies to 
> shun the dark old os.path way, encouraging maintainers to use the new 
> module throughout their code-base, etceteras, but os.path is going to 
> survive a good long while, and I'd imagine that being friendly toward it 
> would keep a few of our comrades off the floor.

Sure, I don't think os.path would die soon, it will surely take longer
than the string module to die. But I think there is a number of places
where Python could be more object-oriented than it is, and this is one
of them. The first step in making those modules more object-oriented is
providing a OO-alternative: the second step is deprecating the old way,
and the third step is providing only the OO-way. The third step will
surely not be made until Python 3.0.

The string module has made the first two steps. In my view, the time
module has made the first step, although I'm not sure whether that's
true. I would like to see a datetime module that makes the time module
totally reduntant, because I never liked the time module: it doesn't fit
into my brain properly, because it's not object oriented. Now, I try to
use the datetime module whenever I can, but something like strptime
isn't there. PEP 321 solves this, so I'd like time to become eventually
deprecated after something DateUtil-like inclusion as well, but it
probably won't.

Hmm, the Zen of Python is not very clear about this:

Now is better than never.
Although never is often better than *right* now.

...so there must be a difference between 'now' and 'right now' :)

> Just as a note, however, we haven't had a *huge* outpouring of glee for 
> the current spike-tests/implementations.  So it may be that we need to 
> get our own little army in shape before attacking the citadel :) .

Sure :)

yours,
Gerrit.

-- 
147. If she have not borne him children, then her mistress may sell her
for money.
          -- 1780 BC, Hammurabi, Code of Law
-- 
Asperger's Syndrome - a personal approach:
	http://people.nl.linux.org/~gerrit/english/



From theller at python.net  Fri Jan 16 14:58:35 2004
From: theller at python.net (Thomas Heller)
Date: Fri, 16 Jan 2004 20:58:35 +0100
Subject: Python COM Server with C++
References: <a40573e7.0401151408.341bda2a@posting.google.com>
Message-ID: <ektzacno.fsf@python.net>

andre.bernemann at gmx.de (Andre Bernemann) writes:

> Hi,
>
> I have written a Python COM Server with the help of Mark Hammond's
> Book Programming Python on Win32. I used the CreateObjects method in
> VB to access the COM Methods and all worked fine. Unfortunately, that
> is not what i really want. First I'd like to make the COM Server
> accessible from C++ and as a beside product I want to use early
> binding within VB with the NEW operator. I've googled around alot, but
> I still have not the complete picture of what to do.
>
> So far I think I have to create an IDL file to describe the interface
> and compile it with the MIDL Compiler. There ist my first question.
> What do I have to create first, the IDL file or the Python COM Server?
> I'm a little bit confused about dispid's, the GUID's and naming
> conventions. Do i need to make use of the makepy Utility in any way?

I think you should create the typelib first, and then write a com object
implementing the interfaces.

I don't have done it myself, but I suggest to look into the spambayes
project.  It contains an outlook plugin, written by Mark Hammond.
Most certainly a bag full of ideas.

Thomas


From aahz at pythoncraft.com  Thu Jan 29 17:02:44 2004
From: aahz at pythoncraft.com (Aahz)
Date: 29 Jan 2004 17:02:44 -0500
Subject: Get error "ImportError: No module named _tkinter"
References: <bvbhl1$1td$05$1@news.t-online.com>
Message-ID: <bvbvu4$ip$1@panix2.panix.com>

In article <bvbhl1$1td$05$1 at news.t-online.com>,
Sebastian Stelzer  <deadlink27 at web.de> wrote:
>
>    import _tkinter # If this fails your Python may not be configured for Tk
>ImportError: No module named _tkinter
>
>I'am using Suse Linux 9.0 with Python 2.3.3.

You need to install Tck/Tk devel package, then rebuild Python.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

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


From tjreedy at udel.edu  Sat Jan 24 12:30:57 2004
From: tjreedy at udel.edu (Terry Reedy)
Date: Sat, 24 Jan 2004 12:30:57 -0500
Subject: [OPINION] - does language really matter if they all
	dothe	samething?
References: <69A0D4AB81C51447AD6BA387782B8D64093D8A@midl-mail4.etcconnect.com><028FD9F0-4E01-11D8-BB78-0003934ACDEC@zdome.net><4011C497.1040302@prescod.net>
	<58587302-4E30-11D8-8FAB-0003934ACDEC@zdome.net>
Message-ID: <buua42$vop$1@sea.gmane.org>


"Dietrich Epp" <dietrich at zdome.net> wrote in message
news:58587302-4E30-11D8-8FAB-0003934ACDEC at zdome.net...
> The rest of the post is dedicated to two examples of patterns which
> don't quite fit into Python, but are used well in some projects written
> in other languages.
...
> My Lisp project related to an RPG and random
> generation of items.  It had lots of code like the following:
>
> (defun random-sword-magic-power (quality)
>    (choose-random-assoc
>      quality (poor medium good)
>      ((5 0 0) (glows-in-the-dark))
>      ((3 3 0) (magically-silent))
>      ((1 5 1) (elemental-power (select-random '(earth water air fire))))
>      ((0 2 4) (magical-keen-edge))
>      ((0 0 2) (append (random-sword-magic-power 'medium)
>                       (random-sword-magic-power 'medium)))))
>
> The numbers on the left are probabilities relative to the other
> probabilities in the same column.  So, when generating a random 'poor'
> magic quality of a sword, you have a 5/9 chance of getting 'glow in the
> dark'.  For a 'good' quality, you have a 2/7 chance of getting two
> 'medium' qualities instead.  It is difficult for me to imagine how one
> would go about making this function more concise, to me it looks
> downright minimal.  The only thing I could see making it smaller would
> be removing the parentheses, but they would have to be replaced by
> something else such as commas or tabs.

This seems straightforward: define a function by partial application of
another, more general function.  Nothing obviously Lisp specific.  A Python
equivalent needs _ instead of - in names and , instead of ' ' to separate
seq items (with spaces optional).  Maybe something like

def random_sword_magic_power(quality):
    return choose-random-assoc(
      quality, (poor,medium,good),
      ((5,0,0), glows_in_the_dark),
      ...
      ((0,0,2), random_sword_magic_power(medium)+
                   random_sword_magic_power(medium))
    )

perhaps with some of the apparent names quoted as literal strings instead,
depending on programming style.

> I'm not trying to say that all applications are like my application,
> and I'm not trying to say that my application can't be written in
> Python.  I'm just saying that using macros, a paradigm that Python
> doesn't even come close to supporting, makes reading and writing
> functions like the above a lot easier.

I knows of things for which this is true, but your example is not obviously
one of them ;-).  Does c_r_a really have to be evaluated at compile rather
than run time?

> You don't even need to know that 'choose-random-assoc' is a macro

I didn't, but I am sure a Lisp programmer would have.

> you just need to know how to use it.

Part of knowing that is knowing what to quote and not to quote.  Since
macros quote args while functions evaluate them, (at least for some lisps,
but I have not read CL rules), it would seem that maybe I would have to
know.  If c_r_a were a function, would the call be *exactly* the same?

> I challenge anyone to come up with a better way to express the above
> function in Python.  If I think it's better, I'll write "PYTHON RULZ"
> on my forehead and post a photo on the web.

I slightly prefer my Python version, but I suspect you will not, so you
remain safe.

> I agree that functions are objects in Python.  However, not everything
> in Python is an object.

Python is a language for manipulating defined types of information objects,
and only such.  Python code is a specific set of directions for doing so.
That is what 'Everything in Python is an object' means and truthfully
states.

>  For example, names are not objects.

Of course not.  Names, as such, are part of the Python grammar, with their
own syntax (production) rule.  They, along with statements, expressions,
operators, puctuation, literals, and comments (etc), are parts of the
programs in which we express our object manipulation intent.  They, along
with all the other grammatical units, are not the objects manipulated.

However, a particular Python interpreter may choose to convert names to
runtime objects for use in its runtime operations.  (CPython does this for
global names and generally for attributes but usually not for function
locals.)  And it may choose to make them available as strings at runtime.
And it may have functions that 'dereference' runtime strings as if the
equivalent sequence of chars had been written (unquoted) in the code.
Hence some of the confusion.

> In Objective C:
...
> In Python, first try:
>
> def reset_settings(self):
>      try:
>          self.set_settings(self.delegate.default_settings(self))
>      except AttributeError:
>          self.set_settings(some_fallback_value)
>
> But wait!  What if there is an error in
> self.delegate.default_settings() which raises an AttributeError?  It
> might confuse the hell out of a programmer who might go looking for the
> bug in reset_settings(), because it's using the fallback value for some
> odd reason.  So we should reimplement it.

If multiple parts of an expressions can raise the same exception, and you
want to tell which part of the expression one comes from (so as to handle
it differently), yes, you will have to compute the expression in stages, as
you do here:

> Python, second try:
>
> def reset_settings(self):
>      method = None
>      try:
>          method = self.delegate.default_settings
>      except AttributeError:
>          pass
>      if method:
>          self.set_settings(method(self))
>      else:
>          self.set_settings(some_fallback_value)

An alternative would have been to 'not do that'.  Instead, differentiate
the exceptions.  Something like

class MyAttributeError(AttributeError): pass

    def default_settings(self):
        try:
           ...
        except AttributeError: raise MyAttributeError

Then 'first try' would, I believe, work same as 'second try' (but callers
might need to know of MyAttributeError).

> If you think this example is contrived, maybe you haven't worked with
> the paradigms used in Objective-C very much.  The example above was
> used dozens of times in a class that I wrote in Objective-C which draws
> a grid to the screen, for example, when it asks itself or its delegate
> what color the grid should be, or the maximum scale allowed.  The
> practice is also used heavily by Apple's Cocoa libraries, which are my
> favorite UI libraries of all time to program with.

If you program in one language using idiomatic patterns from another
language, you may need to write adapter functions, like reset_settings,
that embody the pattern, to ease the translation.  Or stick with the other
language, if you prefer it, or switch patterns, which many of us have done,
at least in part.

Terry J. Reedy






From quiteblack at yahoo.com  Thu Jan  1 21:38:47 2004
From: quiteblack at yahoo.com (black)
Date: Thu, 1 Jan 2004 18:38:47 -0800 (PST)
Subject: undo and redo ?
Message-ID: <20040102023847.78427.qmail@web21326.mail.yahoo.com>

I'm coding with Tkinter and i wonder whether we could get current OS' clipboard available, and event more, anyone can inspires me how we can achieve undo and redo function ?

thanx~


---------------------------------
Do you Yahoo!?
Free Pop-Up Blocker - Get it now
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From kevin at sb.org  Thu Jan 29 13:40:15 2004
From: kevin at sb.org (Kevin Ballard)
Date: Thu, 29 Jan 2004 13:40:15 -0500
Subject: Webhosting with Python
References: <8089854e.0401290012.465ba364@posting.google.com>
Message-ID: <2004012913401516807%kevin@sborg>

On 2004-01-29 03:12:41 -0500, michael at foord.net (Fuzzyman) said:

> > On 2004-01-28 11:34:43 -0500, michael at foord.net (Fuzzyman) said:
> > > > I've recently starting using a very cheap web hoster who has python
> > > 2.2 installed.... almost free hosting (but not quite).....
> > > > > Thought some of you guys might be interested..........
> > > > > http://www.xennos.com
> > > > > Fuzzyman
> > > How do you plan to make money off of this?
> 
> I don't intend to make any money off it...... it's not my hosting firm
> - but I know how long it took me to find cheap hosting with Python -
> so I thought others might be interested.

Oh, I misunderstood, I thought you were running that.

So, then, how do *they* plan to make money off of that?

--
"Remember, no matter where you go, there you are."
                                 -Buckaroo Banzai
Kevin Ballard
http://kevin.sb.org


From mike at mhuffman.com  Fri Jan 23 12:13:05 2004
From: mike at mhuffman.com (Mike Huffman)
Date: 23 Jan 2004 09:13:05 -0800
Subject: Program Python in VIM
References: <871xpsc5zf.fsf@tulip.whu.ca> <r7xrvm1a.fsf@yahoo.co.uk>
	<40103ee7.108130723@news.blueyonder.co.uk>
Message-ID: <3ae9c53d.0401230913.64c7150d@posting.google.com>

> > > :!python test.py
> > >
> > >
> > > Is there any other way? I don't want to type 'python test.py' every time
>  
> :!!
> 
> repeats the last command.

% is the symbol for "current file name," so I use:

:w
:!python %

then thereafter in the current vi session:
:!!

It would be nice to be able to combine the write and shell command in
one single command...

Mike


From sdfATexpertuneDOTcom  Mon Jan 19 15:14:33 2004
From: sdfATexpertuneDOTcom (Scott F)
Date: Mon, 19 Jan 2004 20:14:33 -0000
Subject: HowTo distinguish between File and Directory
References: <Xns94758BB1DDFADsdfexpertunecom@216.168.3.44>
	<400C35C2.2C46EE3C@engcorp.com>
Message-ID: <Xns947590E1AF648sdfexpertunecom@216.168.3.44>

Peter Hansen <peter at engcorp.com> wrote in
news:400C35C2.2C46EE3C at engcorp.com: 

> Scott F wrote:
>> 
>> On Win32, is there a function in the standard modules that can
>> take a pathname and return whether it refers to a File or a
>> Directory? 
> 
> import os
> os.path.isfile(name)
> os.path.isdir(name)
> 
> Is that adequate?

Yes.  I only did a dir(os) and thus didn't see the items under path.  

Thanks Peter (and Erik).

Scott


From JTesser at nbbc.edu  Thu Jan 15 08:29:45 2004
From: JTesser at nbbc.edu (Jason Tesser)
Date: Thu, 15 Jan 2004 07:29:45 -0600
Subject: wxwindows question
Message-ID: <04875CB4331F0240A0AD66F97097865101137748@paul>

Have you developed many apps that run on both Linux and Windows??

> -----Original Message-----
> From: python-list-bounces+jtesser=nbbc.edu at python.org
[mailto:python-list-
> bounces+jtesser=nbbc.edu at python.org] On Behalf Of Jorge Godoy
> Sent: Thursday, January 15, 2004 7:21 AM
> To: python-list at python.org
> Subject: Re: wxwindows question
> 
> On Tuesday 13 January 2004 11:31 Jason Tesser wrote in
> <mailman.320.1074000727.12720.python-list at python.org>:
> 
> > I am looking into using wxwindows for a gui to develop applications.
> > The
> > Apps need to be cross-platform Mac, Windows, Linux. I work
> > For a bible college and will be developing applications ranging from
> > online
> > Registration to business office software.  My question is what is
> > your guys
> > Experiences with wxwindows/python?  What is the best tool that is
> > stable
> > I can use?  I am looking into using wxDesigner with maybe Wing or
> > Komodo.
> > What do you guys think?
> 
> I'm used to use wxGlade to create GUIs, but you can do it with other
> tools as well. A friend of mine likes more BOA Constructor. But my
> development platform is Linux...
> 
> With regards to wxPython, I'm all for it. This a very good GUI and the
> fact of it having native look on the OSs you cited above is a plus:
> users won't be surprised with a new look in your application and
> everything will be where they are used to get it.
> 
> You can take a look at GNUMed for a nice design using wxPython.
> 
> 
> See you,
> --
> Godoy.     <godoy at ieee.org>
> --
> http://mail.python.org/mailman/listinfo/python-list



From john at doe.com  Fri Jan 23 13:58:34 2004
From: john at doe.com (Brian Donovan)
Date: Fri, 23 Jan 2004 18:58:34 GMT
Subject: libxml2 w/ xpath python bindings
Message-ID: <pan.2004.01.23.18.58.27.798655@doe.com>

Hi All,

  I'm trying to get xpath to work with the libxml2 python bindings.
I'm using the following

doc = libxml2.parseFile(filename)
result = doc.xpathEval('//*')

My test XML file has 10 nodes in it and I'm trying to get an element named
'element' (from an relaxng schema). 

If I use the xpath expression '//*' I'll get a list with 10 nodes
including the element element as expected. If I try '//element' I'm
getting an empty list with no errors. Any idea where I could be going
wrong?

Brian 



From christoph at mmc-startup.com  Fri Jan 16 12:20:50 2004
From: christoph at mmc-startup.com (Christoph Becker-Freyseng)
Date: Fri, 16 Jan 2004 18:20:50 +0100
Subject: [Python-Dev] No more releases of MacPython-OS9?
In-Reply-To: <B430AC58-4820-11D8-8BB4-000A958D1666@cwi.nl>
References: <AFEEDE1A-4796-11D8-8F23-000A27B19B96@cwi.nl>	<20040115212700.GA7170@panix.com>
	<B430AC58-4820-11D8-8BB4-000A958D1666@cwi.nl>
Message-ID: <40081D72.2050607@mmc-startup.com>

Jack Jansen wrote:

>
> On 15-jan-04, at 22:27, Aahz wrote:
>
>> On Thu, Jan 15, 2004, Jack Jansen wrote:
>>
>>>
>>> 2. Buy an Installer VISE license. If I read
>>> <http://www.mindvision.com/pricing.asp> correctly this would cost $500
>>> per year, probably for the next 2 years. This will only happen if
>>> someone else comes up with the money: I don't have it...
>>
>>
>> Looks like 2.3 is the latest release currently available.  There've been
>> a lot of bugfixes since then.  Do you have any download statistics for
>> the OS9 version?  (I.e. rough idea of how many people care.)
>
>
> I have now:-)
>
> I'm a bit surprised at the results: MacPython-OS9 is a *lot* more 
> popular than I had thought.... Over the last few months I see about 
> 6000 MacPython downloads per month from my site (I didn't check 
> versiontracker and such, that'll be a couple hundred more, I guess). 
> For december the breakdown is 2000 downloads for 10.2, 2000 downloads 
> for 10.3 and 1700 downloads for OS9. The other 300 are various things 
> like source and such. 10.2 downloads are slowly declining, 10.3 
> downloads increasing.
>
> But the fact that 30% of the MacPython users are still downloading the 
> OS9 binary really surprises me...
>
> So it seems MacPython-OS9 does have a place, still... 

What about asking if someone of these Mac Users has such a license?


Christoph Becker-Freyseng







From fumanchu at amor.org  Sat Jan  3 03:47:21 2004
From: fumanchu at amor.org (Robert Brewer)
Date: Sat, 3 Jan 2004 00:47:21 -0800
Subject: Project dream
Message-ID: <DE1CF2B4FEC4A342BF62B6B2B334601E561BBC@opus.amorhq.net>

eltronic at juno.com wrote:
> On 26 Dec 2003 12:36:48 -0800 hwlgw at NOSPAMhotmail.com (Will 
> Stuyvesant) writes:
> > Suppose you have the time and the money to start a new project in
> > Python.  What would you like to do?
> > What would your favorite be?
> 
> a timer capable of alarms or starting programs with
> various ways of specifying the event, weekly monthly 
> don't start untill, stop after date, user defined, etc.

I've been needing to write this, as well, for my own apps. Here is a
first attempt (*very* alpha); feedback/additions appreciated.

http://www.aminus.org/rbre/python/recur.py
http://www.aminus.org/rbre/python/test_recur.py



Robert Brewer
MIS
Amor Ministries
fumanchu at amor.org



From virus.manager at st.com  Tue Jan 27 09:50:11 2004
From: virus.manager at st.com (virus.manager at st.com)
Date: Tue, 27 Jan 2004 14:50:11 -0000
Subject: Virus Alert
Message-ID: <20040127145011.EABCBF986@zeta.dmz-eu.st.com>

The mail message (file: kddh.zip) you sent to <martin95 at wanadoo.fr> contains a virus. (on zeta)



From gee_arr_why at ll.mit.edu  Fri Jan  9 15:12:45 2004
From: gee_arr_why at ll.mit.edu (George Young)
Date: Fri, 09 Jan 2004 15:12:45 -0500
Subject: Database interfacing
References: <mailman.225.1073663120.12720.python-list@python.org>
Message-ID: <pan.2004.01.09.20.12.36.162595@ll.mit.edu>

On Fri, 09 Jan 2004 10:45:06 -0500, Michael T. Babcock wrote:

> I'm working with databases (MySQL primarily) more and more with Python, 
> and having used PERL in the past for similar work, I'm wondering if 
> there are good tools for doing 'intelligent' selects/inserts to/from 
> dictionaries, etc.  For example:
> 
> data = {'FirstName': 'Michael', 'LastName': 'Babcock', 'Age': 99}
> lastid = db.insert('Users', data)
> 
> ... which would execute "INSERT INTO Users (FirstName, LastName, Age) 
> VALUES ('Michael', 'Babcock', 99)"
> 
> And also helpful would be:
> 
> data = db.query("dbname", "SELECT * FROM Users WHERE Age >= 99)")
> 
> ... which would return me an array of dictionary items like:
> 
> [ {'ID': 143, 'FirstName': 'Michael' ... }, {'ID': 242, ... }, ... ]
> 
> Just curious, thanks (I've written a piece of code to generate the array 
> of dictionary results myself actually, but I'm sure someone else's is 
> better).

You might find dbrow helpful: 
  http://opensource.theopalgroup.com/
  http://opensource.theopalgroup.com/files/db_row-0.8.tgz
  http://opensource.theopalgroup.com/files/db_row.py

-- 
George Young
gee arr why at ll.mit.edu
[three letter username]



From no at spam.edu  Fri Jan 30 18:30:09 2004
From: no at spam.edu (Doug Holton)
Date: Fri, 30 Jan 2004 17:30:09 -0600
Subject: Building a Course Management System
In-Reply-To: <e9570f37.0401301146.714d1551@posting.google.com>
References: <e9570f37.0401301146.714d1551@posting.google.com>
Message-ID: <bvepdt$800$2@news.vanderbilt.edu>

Graham Fawcett wrote:
 > My employer (University of Windsor, Canada) has given me the go-ahead
 > to prototype a CMS (Course Management System, not Content
 > Management), written in Python, to be released under an open-source
 > license (choice of license is TBA).
 >
 > Course Management is a rather broad domain, covering content
 > management, communications tools (e.g., announcements, mail, chat,
 > discussion), assessment (quizzes, surveys, assignments, gradebook),
 > activity tracking, etc. Ideally a good CMS will be portal-based, to
 > aid in managing information- and work-flow.
...
 > -- Are there other Python-based CMS (Course management systems) that
 > I've overlooked? (Zope4Edu came to mind, but it's commerical, I think;
 > at least, there's no public CVS that I can find.)

There is Fle3 (Zope-based):
http://fle3.uiah.fi/ and http://www.zschool.org/main (Fle3 + Plone)
See also Eclass.Builder: http://www.eclass.net/

Are you sure you wouldn't want to just adapt one of the existing PHP 
tools like ATutor or Moodle?:
http://www.edtechpost.ca/pmwiki/pmwiki.php/EdTechPost/OpenSourceCourseManagementSystems
http://holton.ltc.vanderbilt.edu/wiki/LearningManagementSystem

That would be easier, esp. if you only have 8 weeks.  But if you do 
start a python CMS, you have to first decide which web framework to use:
http://www.python.org/cgi-bin/moinmoin/WebProgramming
http://colorstudy.com/docs/shootout.html

Good luck with it,
-Doug


From exarkun at intarweb.us  Mon Jan 19 19:52:19 2004
From: exarkun at intarweb.us (Jp Calderone)
Date: Mon, 19 Jan 2004 19:52:19 -0500
Subject: speedy Python strings?
In-Reply-To: <buhtjb$ida$1@news.rz.uni-karlsruhe.de>
References: <buhtjb$ida$1@news.rz.uni-karlsruhe.de>
Message-ID: <20040120005219.GA4873@intarweb.us>

On Tue, Jan 20, 2004 at 01:43:24AM +0100, Uwe Mayer wrote:
> Hi,
> 
> thanks to previous help my wrapper for an abstract file type with variable
> record length is working now.
> I did some test runs and its awfully slow:
> 
> I didn't want to read in the whole file at once and I didn't like to read it
> step by step (contains 32 bit length terminated strings (Delphi) and 32bit
> integers), so I read in i.e. 2MB, work on that buffer and if the buffer
> goes empty i load some more 2MB, etc.
> For this buffer I use ordinary strings:
> 
> class myFile(file):
>         def read(self, *args):
>                 ...
>                 self.buffer += file.read(self, *args)
>                 ...

  Doing the above in a loop has quadratic complexity.

> 
> and after reading information from the buffer I remove the read part from
> it:
>         
>         text = struct.unpack("L", self.buffer[:4])
>         self.buffer = self.buffer[4:]

  The same is true for this line.

  Your program will be much faster if you make fewer string copies. 
"self.buffer[4:]" is a string copy, as is "self.buffer += anotherString".

  The buffer() builtin is one way to avoid copying, but another way is to
simply keep track of how far into the string you are and use both low and
high indexes when slicing, instead of repeatedly chopping the front off the
string.

  Jp



From craspe at mvtools.net  Mon Jan 26 15:29:40 2004
From: craspe at mvtools.net (chris)
Date: Mon, 26 Jan 2004 15:29:40 -0500
Subject: Guardian: open source is a throwback says Jack Schofield
In-Reply-To: <40156FB6.F71C19B0@engcorp.com>
References: <64cff82f.0401251143.328388bd@posting.google.com>	<mailman.772.1075066543.12720.python-list@python.org>	<bv1jkf$g46$1@namru.matavnet.hu>	<bv1pgj$ctl$3@news.service.uci.edu>
	<40156FB6.F71C19B0@engcorp.com>
Message-ID: <401578B4.9010300@mvtools.net>

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From uce at ftc.gov  Sun Jan 25 13:48:19 2004
From: uce at ftc.gov (Gordon Airport)
Date: Sun, 25 Jan 2004 13:48:19 -0500
Subject: Text Animation
In-Reply-To: <7b454334.0401242038.11404dac@posting.google.com>
References: <7b454334.0401242038.11404dac@posting.google.com>
Message-ID: <0cCdnahKj7_1kondRVn_iw@comcast.com>

Fazer wrote:

snip

 > Or maybe even
> a rotating " | " that I have seen before in some installation
> programs.
> 

On each loop use the \b backspace character to move the cursor back, 
then overwrite with progressive characters for the spinner. This can 
look bad if the cursor is visible.


From __peter__ at web.de  Wed Jan 28 11:42:04 2004
From: __peter__ at web.de (Peter Otten)
Date: Wed, 28 Jan 2004 17:42:04 +0100
Subject: isinstance() bug
References: <20040128132225.GA10842@foof.i3.cz>
	<16407.54576.283608.505067@montanaro.dyndns.org>
	<mailman.925.1075304492.12720.python-list@python.org>
Message-ID: <bv8ok3$539$03$1@news.t-online.com>

Michal Vitecek wrote:

>  does it make sense?

Which reminds me - why do you want to put a package directory into your
python path in the first place?. Before spending to much effort on fixing
the problems that this practice entails, what are the benefits?

Peter



From antonmuhin at rambler.ru  Thu Jan  8 10:53:57 2004
From: antonmuhin at rambler.ru (anton muhin)
Date: Thu, 08 Jan 2004 18:53:57 +0300
Subject: Calling a function dynamically
In-Reply-To: <924a9f9c.0401080742.39eba581@posting.google.com>
References: <924a9f9c.0401080742.39eba581@posting.google.com>
Message-ID: <btjuj7$85i3l$1@ID-217427.news.uni-berlin.de>

Paradox wrote:

> I would like to call a function whose name I supply at runtime.
> Something like this but it didn't work
> 
> functionName = 'run'
> instance = ClassDef()
> args = [1, 2]
> 
> #want the dynamic equivalant of
> #instance.run(*args)
> 
> #This didn't work cause there was no __call__ attribute. Why?
> value = instance.__call__[functionName](*args)
> 
> 
> 
> 
>                Thanks Joey

This should work:
getattr(instance, functionName)(*args)

regards,
anton.


From JoeyTaj at netzero.com  Sat Jan 10 15:43:30 2004
From: JoeyTaj at netzero.com (Paradox)
Date: 10 Jan 2004 12:43:30 -0800
Subject: Calling a function dynamically
References: <924a9f9c.0401080742.39eba581@posting.google.com>
	<btk1i4$ca4$02$1@news.t-online.com>
	<slrnbvr5hb.seu.ramen@lackingtalent.com>
Message-ID: <924a9f9c.0401101243.6ad98242@posting.google.com>

Thanks to all. The getattr was exactly what I need and the __getitem__
override is a nice touch.


Dave Benjamin <ramen at lackingtalent.com> wrote in message news:<slrnbvr5hb.seu.ramen at lackingtalent.com>...
> In article <btk1i4$ca4$02$1 at news.t-online.com>, Peter Otten wrote:
> > Paradox wrote:
> > 
> >> I would like to call a function whose name I supply at runtime.
> >> [snip]
> > 
> > Here's a way to abuse the [] operator (implemented by __getitem__()) to
> > dynamically select a method...
> > 
> >>>> t["run"]("alpha", "beta", "gamma")
> > run('alpha', 'beta', 'gamma')
> 
> I wouldn't necessarily consider this abuse. This behavior (where
> square-bracket- and dot-syntax are functionally equivalent) is the normal
> behavior of JavaScript, and it makes dynamic lookup of method names a snap.
> Python is more flexible in giving you the option to have separate namespaces
> for items and attributes, but if it makes more sense for an object to merge
> the two, I see nothing wrong with it.


From nid_oizo at yahoo.com_remove_the_  Mon Jan 12 16:17:54 2004
From: nid_oizo at yahoo.com_remove_the_ (Nicolas Fleury)
Date: Mon, 12 Jan 2004 16:17:54 -0500
Subject: How to call a system command with flexibility on Windows
Message-ID: <4aEMb.1798$PK6.17978@nnrp1.uunet.ca>

Hi everyone,
	I have a hard time trying to call a system command with the following 
capability on Windows:
- Redirection of stdout and stderr.
- Have the return code.

The documentation seems to say it's only possible on Unix, have I missed 
something.  Thx for your help.

Nicolas



From webmaster at keyphrene.com  Fri Jan  9 15:11:45 2004
From: webmaster at keyphrene.com (webmaster at keyphrene.com)
Date: Fri, 09 Jan 2004 20:11:45 GMT
Subject: ANN: Naja 0.9.7 is now available 
Message-ID: <3fff0c13$0$29083$636a55ce@news.free.fr>

Naja is a download manager and a website grabberl written in Python/wxPython.
You can add some plugins (newsreader, newsposter,  client FTP, client WebDAV) 
and take the control on your downloads since your office. Naja supports proxy (HTTP,
HTTPS, FTP, SOCKS v4a, SOCKS v5), and use some authentication methods.
The downloading maybe achieved by splitting  the file being downloaded 
into several parts and downloading these parts  at the same time (HTTP,
 HTTPS, FTP). Donwload speeds are increased by downloading the file 
from the mirrors sites, when the sites propose it.

Others features: 
 Csv filter 
 Cheksums (CRC32, MD5, SHA1)
 newsreader, newsposter (uue, yEnc)
 CGI & WebDAV Server (only PROPFIND method for the moment)
 Web Interface
 basic and digest authentication for client and server

Naja is available for download from the Keyphrene web site:
http://www.keyphrene.com/products/naja


From hat at se-126.se.wtb.tue.nl  Fri Jan 16 03:37:42 2004
From: hat at se-126.se.wtb.tue.nl (Albert Hofkamp)
Date: Fri, 16 Jan 2004 08:37:42 +0000 (UTC)
Subject: data structures module
References: <92c59a2c.0401152306.1c6a17f5@posting.google.com>
Message-ID: <slrnc0f8if.ifn.hat@se-126.se.wtb.tue.nl>

On 15 Jan 2004 23:06:44 -0800, MetalOne <jcb at iteris.com> wrote:
> I am fairly new to Python.
> Today, I wanted a priority queue.
> I notice that Python does not have any sorted lists.
> I know that I can call list.sort(), but that seems rather inefficient
> to call every time an element is added.

It is (probably).

Instead, sort the list once, then for each element you insert, find the
place using binary search, then insert the element with insert().

> I am wondering why there is not a module or modules containing many
> common data structures.

Probably because the native data structures of Python are rich enough to
solve most problems in an adhoc way.

>  Has such a thing been decided against?  Is it

No, but what do you want added that isn't there, and is not easily
constructed by a few lines of Python?


Albert
-- 
Unlike popular belief, the .doc format is not an open publically available format.


From Florian.Lindner at xgm.de  Sun Jan  4 14:06:45 2004
From: Florian.Lindner at xgm.de (Florian Lindner)
Date: Sun, 04 Jan 2004 20:06:45 +0100
Subject: Let users execute but not view
Message-ID: <bt9o11$7rq$05$1@news.t-online.com>

Hi!
I have a python script which should be executed my normal users but they
should not be able to view the sourcecode. Setting permissions to x only
does not help, the python interpreter can not read the file.
How can I do that?
Thanks,
Florian


From alan_salmoni at yahoo.com  Sun Jan 18 06:43:56 2004
From: alan_salmoni at yahoo.com (Alan James Salmoni)
Date: 18 Jan 2004 03:43:56 -0800
Subject: Python used in Freedom Force
References: <4BDF2B3C-464A-11D8-B48D-000A959CB2EC@netmail.to>
	<mailman.392.1074170206.12720.python-list@python.org>
	<4006911e$0$327$e4fe514c@news.xs4all.nl>
Message-ID: <b68f71a7.0401180343.579a8568@posting.google.com>

Irmen de Jong <irmen at -NOSPAM-REMOVETHIS-xs4all.nl> wrote in message news:<4006911e$0$327$e4fe514c at news.xs4all.nl>...
> Roberto Amorim wrote:
> 
> > Not only Freedom Force, but also Severance: Blade of Darkness (3rd-person
> > action medieval game) and Bridge Commander (Star Trek TNG simulator).
> 
> And also Cyan's URU:Ages Beyond Myst.
> I discovered some Python dlls and files in the game directory...
> 
> --Irmen

Perhaps all this stuff could be put onto the "Python Success Stories"
part of the python.org website? It's not public, but if the language
is clearly being used...

Alan.


From rays at blue-cove.com  Thu Jan 29 18:19:50 2004
From: rays at blue-cove.com (Ray Schumacher)
Date: Thu, 29 Jan 2004 15:19:50 -0800
Subject: wxNotebook question
In-Reply-To: <40198A0D.70704@geochemsource.com>
Message-ID: <5.2.0.4.0.20040129151313.02127918@blue-cove.com>

At 02:32 PM 1/29/2004, Gandalf wrote:
>How can I hide/show a page (wxNotebookPage) invisible of a wx.wxNotebook instance?
>There is a GetPage() method which returns a wxNotebookPage but I could not find
>any documentation in the help about this class. 

I use:
C:\Python23\Lib\site-packages\wxPython\docs\wx.chm
always, but 
http://www.orbtech.com/www/wx/epydoc/
is great, and shows inherited properties

>I thought there will be a 'SetVisible'
>or 'SetTabvisible' method but it seems to be a proxy for the root control on that page.
>So I cannot even get method names by dir(self.notebook.GetPage(0)).

Check the "Show()" method
<wx.Window-class.htm#Show>Show(self, show) 
(inherited from <wx.Window-class.htm>Window) 


Ray 
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From just at xs4all.nl  Sat Jan  3 07:27:38 2004
From: just at xs4all.nl (Just)
Date: Sat, 03 Jan 2004 13:27:38 +0100
Subject: Filename type (Was: Re: finding file size)
References: <4V4Jb.12709$Vl6.2811218@news20.bellglobal.com>
	<bt3l9i$pog$07$3@news.t-online.com>
	<mailman.45.1073125105.12720.python-list@python.org>
Message-ID: <just-205B15.13273803012004@news1.news.xs4all.nl>

In article <mailman.45.1073125105.12720.python-list at python.org>,
 Gerrit Holl <gerrit at nl.linux.org> wrote:

> I propose to add a "filename" type to Python.
> 
[ ... ]
> A different solution to this problem would be to introduce "filename"
> type to Python, a subclass of str. The "name" attribute of file would be of 
> this
> type. This type would inherit a lot of os.path stuff: getsize becomes
> simpler, more readable, and more object oriented, as do other os.path
> functions. I think the alternatives look a lot more prety:
> 
> OLD                                         NEW
> os.path.realpath(fn)                        fn.realpath()
> os.path.getmtime(fp.name)                   fp.name.getmtime()
> os.path.ismount(os.path.dirname(fp.name))   fp.name.dirname().ismount()
> 
> It's more beatiful, simpler, flatter (#3), practical, obvious, easy.

This has been proposed a few times, and even implemented at least once:

  http://www.jorendorff.com/articles/python/path/

I'm very much in favor of adding such an object, but I don't like Jason 
Orendorff's design all that much. There has been a discussion about it 
in the past:

http://groups.google.com/groups?q=g:thl1422628736d&dq=&hl=en&lr=&ie=UTF-8
&oe=UTF-8&safe=off&selm=mailman.1057651032.22842.python-list%40python.org

Just


From peter at engcorp.com  Mon Jan 12 12:11:26 2004
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 12 Jan 2004 12:11:26 -0500
Subject: Why learn Python ??
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<du765fh2l5a.fsf@amadeus.cc.tut.fi>
Message-ID: <4002D53E.CD17D2F6@engcorp.com>

Ville Vainio wrote:
> 
> If you choose Perl, you will at some regret your choice and consider
> porting the app to Python. You save a lot of time/frustration by not
> going there in the first place.

This is only true if you actually know Python.  If you carefully avoid
acquiring any knowledge of or ability in Python, you will rarely regret
the decision not to use Python for your project. <wink>

-Peter


From bdelmee at advalvas.REMOVEME.be  Sat Jan 10 10:33:52 2004
From: bdelmee at advalvas.REMOVEME.be (=?ISO-8859-1?Q?Bernard_Delm=E9e?=)
Date: Sat, 10 Jan 2004 16:33:52 +0100
Subject: Writing Files
In-Reply-To: <AJULb.1380$q4.460@newsread3.news.atl.earthlink.net>
References: <AJULb.1380$q4.460@newsread3.news.atl.earthlink.net>
Message-ID: <40001b70$0$1115$6c56d894@feed0.news.be.easynet.net>

Which statement did you try? Here's a one-liner that works:

file( 'mydata.txt', 'w' ).write( "the python sleeps tonight" )



From claird at lairds.com  Wed Jan 14 10:42:00 2004
From: claird at lairds.com (Cameron Laird)
Date: Wed, 14 Jan 2004 15:42:00 -0000
Subject: I come not to bury C++, but to praise it...
References: <mailman.337.1074032524.12720.python-list@python.org>
	<40055560.7A0DCD0D@engcorp.com>
Message-ID: <100aoq8efq3nt1e@corp.supernews.com>

In article <40055560.7A0DCD0D at engcorp.com>,
Peter Hansen  <peter at engcorp.com> wrote:
			.
			.
			.
>John, thanks for the reminder about the origins of C++.  (I suspect the majority
>of readers in this group were not even programming during the CFront era 
>(roughly 1983-85?), and a history lesson is always good from time to time.)
			.
			.
			.
I was still fussing with cfront in the early '90s.
Its era *had* passed by then, though.
-- 

Cameron Laird <claird at phaseit.net>
Business:  http://www.Phaseit.net


From eddie at holyrood.ed.ac.uk  Mon Jan 26 12:33:42 2004
From: eddie at holyrood.ed.ac.uk (Eddie Corns)
Date: Mon, 26 Jan 2004 17:33:42 +0000 (UTC)
Subject: BaseHTTPServer and class variables
References: <88caaeda.0401260825.4db9a07d@posting.google.com>
Message-ID: <bv3j1m$5vj$1@scotsman.ed.ac.uk>

yin_12180 at yahoo.com (Yin) writes:

>Hello.

>I am using the basehttpserver to implement the HTTP protocol to serve
>a fairly large lexicon that I have loaded as a dictionary in python. 
>Rather than writing a whole server, I would like to reuse the
>BaseHTTPserver classes. I am interested in finding a way to serve the
>dict without loading the whole dict into memory everytime an HTTP
>request is made. The dict lives in local memory when it is loaded and
>takes a long time to load.

>Unfortunately with the basehttpserver.httpserver and
>basehttpserver.requesthandlerclass, I am not finding it easy to define
>a method to load the dict initially.  Any thoughts are appreciated.

>Ideally, in a do_GET for the requesthandlerclass, it'd be nice to be
>able to access the dict as a class variable, but this doesn't work for
>me.

import BaseHTTPServer

class Serv (BaseHTTPServer.BaseHTTPRequestHandler):
    def do_GET (self):
        path = self.path.strip('/').split('/')
        self.send_response (200)
        self.send_header ('Content-type', 'text/html')
        self.end_headers()
        self.wfile.write (self.dict[path[-1]])

# load dictionary
D={'foo':1, 'bar':2}
server = BaseHTTPServer.HTTPServer (('', 8080), Serv)
server.RequestHandlerClass.dict = D
server.serve_forever()

Possibly not the best way but it should do unless someone less lazy than I
responds.  (Assuming I'm understanding your request correctly).

Eddie


From Kyler at news.Lairds.org  Sun Jan 18 19:12:06 2004
From: Kyler at news.Lairds.org (Kyler Laird)
Date: Mon, 19 Jan 2004 00:12:06 GMT
Subject: efficent test for array with only one value?
Message-ID: <00ird1-dmd.ln1@jowls.lairds.org>

I'm trying to discover if there's an efficient way to determine
if all of the values of a Numeric array are the same.  In C, I
would search from the second value, checking each against the
first value.  The first one that doesn't match would trigger a
False return value.  If the loop completes, True would be
returned.

Looking through array functions, I'm not finding anything like
that.  I'm imagining that there should be something like an
equal function (Is that Lisp I'm recalling?) that performs
	a[0,0] == a[0,1] == a[0,2] == ...
and returns False as soon as it is known.  I don't see that.

I can, of course, iterate through all of the values, but it
seems like there should be an efficient built-in function to do
it.

Thank you.

--kyler


From peter at engcorp.com  Thu Jan 29 12:48:44 2004
From: peter at engcorp.com (Peter Hansen)
Date: Thu, 29 Jan 2004 12:48:44 -0500
Subject: crc-16
References: <ec254e04.0401290526.89bced6@posting.google.com>
	<40191E1D.D912C1BB@engcorp.com> <1xpihkbe.fsf@python.net>
Message-ID: <4019477C.82E8468F@engcorp.com>

Thomas Heller wrote:
> 
> Peter Hansen <peter at engcorp.com> writes:
> > [code snipped]
> 
> Since you didn't post the unit tests, the code seems incomplete.
> From a TDD kind of view, at least.  I'm disappointed of you <wink>.

It was developed in 2000, before the invention of TDD and before my group
started doing XP or TDD, and by a co-op student at that. :-)

-Peter


From sombDELETE at pobox.ru  Tue Jan 20 16:44:02 2004
From: sombDELETE at pobox.ru (Serge Orlov)
Date: Wed, 21 Jan 2004 00:44:02 +0300
Subject: New to Python: my impression v. Perl/Ruby
References: <mailman.493.1074484056.12720.python-list@python.org>
	<bui91p01uu6@enews2.newsguy.com> <du71xpue3rm.fsf@mozart.cc.tut.fi>
Message-ID: <buk7es$2db6$1@nadya.doma>


"Ville Vainio" <ville.spamstermeister.vainio at thisisspamprotectiontut.finland> wrote in message
news:du71xpue3rm.fsf at mozart.cc.tut.fi...
> >>>>> "Phil" == Phil Tomson <ptkwt at aracnet.com> writes:
>
>     Phil> Different strokes for different folks, I guess.  I remember
>     Phil> that one of the first things I saw about Ruby was that even
>     Phil> interger literals were objects that can receive messages and
>     Phil> thinking how wonderful that was.  As you say, you're not
>
> Ints are objects in python too:
>
> >>> a=1
> >>> a.__lshift__(1)
> 2
>
> Though "sending messages" to int literals is a syntax error.

Try this:
>>> (1).__lshift__(1)
2

-- Serge.




From mir4uu at yahoo.com  Thu Jan 15 12:08:46 2004
From: mir4uu at yahoo.com (mir nazim)
Date: 15 Jan 2004 09:08:46 -0800
Subject: needed PyXPCOM tutorial.
Message-ID: <425cc8d1.0401150908.287de0d8@posting.google.com>

hi 
i m in need of a PyXPCOM tutorial. it should explain using python
(instead of JavaScript) for creating apps. if any body can point me to
some web resources or a printed book .
thankz


From raims at dot.com  Tue Jan 20 15:52:50 2004
From: raims at dot.com (Lawrence Oluyede)
Date: Tue, 20 Jan 2004 21:52:50 +0100
Subject: an example of a singleton design pattern in python?
References: <hc63caapdui.fsf@praxis.lsil.com>
Message-ID: <87ad4ifil9.fsf@mobile.foo>

Daniel Ortmann <dortmann at lsil.com> writes:

> Does anyone have an example of a singleton design pattern in python?

Take a look at "Thinking in python"
http://www.mindview.net/Books/TIPython

-- 
Lawrence "Rhymes" Oluyede
http://loluyede.blogspot.com


From hgeldenhuys at gims.com  Wed Jan 28 09:56:09 2004
From: hgeldenhuys at gims.com (Herman Geldenhuys)
Date: Wed, 28 Jan 2004 16:56:09 +0200
Subject: Fw: Security validation issue
Message-ID: <005201c3e5ae$dd781310$b10d10ac@metasalio>

Oops! Sorry guys, wrong list...

Apologies.

----- Original Message ----- 
From: Herman Geldenhuys 
To: python-list at python.org 
Sent: Wednesday, January 28, 2004 4:54 PM
Subject: Security validation issue


I've written a Zope product that exposes a "MenuItem". I add a menuItem in a Zope folder, and I have no difficulty accessing and editing it via the ZMI. I've written an xml-rpc-like protocol for Zope, that basically validates the security "manually". 

This menuItem has an attribute called "def getVersion(self):" which returns an int.

This is the Code that prevents me from accessing the method in python, via my protocol:

if not AccessControl.getSecurityManager().validate(None, object, attributes[-1]):
                        raise UnauthorisedAccessException('Unauthorised: ' + originalAddress)

object = <bound method HWMenuItem.getVersion of <HWMenuItem instance at 01B7B290>>
              This is the method getVersion

attributes[-1] = "getVersion" (string)

UnauthorisedAccessException: Unauthorised: menus.administration.addUser.getVersion

This code works for any other default Zope type, but not mine. Did I perhaps forgot a permission or something?

I can access this fine via the ZMI, but when I validate it this way, python just starts cursing at me.

Can somebody help?

Thanks

H
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From tjreedy at udel.edu  Thu Jan  8 13:48:46 2004
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 8 Jan 2004 13:48:46 -0500
Subject: Why " ".some_string is often used ?
References: <Xns94698A5566736stefninnospamyahoofr@213.228.0.4>
	<vvqghojub1dl07@news.supernews.com>
Message-ID: <WuqdnV9uUeebO2CiRVn-jw@comcast.com>


"John Roth" <newsgroups at jhrothjr.com> wrote in message
news:vvqghojub1dl07 at news.supernews.com...
> And I agree, it's not entirely obvious why it's a string
> method rather than a list method,

Because, as I and others have posted several times in previous threads, and
explicated with several examples, <str,unicode>.join is NOT, NOT, NOT a
list method, anymore than it is a tuple, dict, array, generator-iterator,
or any other iteratable method.  Taking 'string' genericly (as either type
str or unicode), .join  joins a sequence (iterable) of strings with a
string.

>since it operates on a list, not on a string.

Huh?  It operates on a sequence of strings.  It has nothing to do with
lists in particular.  The builtinness and mutability of lists is irrelevant
to this generic read-only operation.

>>> help(str.join) # or ''.join or unicode.join or u''.join
join(...)
    S.join(sequence) -> string
    Return a string which is the concatenation of the strings in the
    sequence.  The separator between elements is S.

Notice the absence of 'list'.  Please do not confuse newbies with
misinformation.

> The only explanation that makes
> sense is that, as a list method, it would fail if the list
> contained something other than a string.

This is true for any iterable that contains or yields something other than
a string.
Again, this function/method has nothing in particular to do with lists
other than the fact that lists are one of several types of iterables.  That
is why join cannot be a list method and certain not just a list method.

If 'iterable' were a concrete type/class/interface that all iterables had
to inherit from in order to be recognized as an iterable, rather that an
abstract protocol to be implemented, then one might suggest that join be an
iterable method.  But the statement above, with 'list' replaced by
'iterable', would still be true.  Given that only a small finite subset of
the unbounded set of iterable functions could be designated as basic by
being made a method, one could easily argue that such designation should be
restricted to functions potentially applicable to any iterable.  Count,
filter, map, reduce, iterate (apply for-loop body), and others in itertools
would be such candidates.

If there were an iterable-of-basestrings object subbing the hypothetical
iterable object, then join might an appropriate method for that.  But that
is not the Python universe we have.  Not do I necessarily wish it.  The
beauty of the abstract iterable/iterator interfaces, to me, is that they
are so simple, clean, and genericly useful, without having to privilege
anyone's idea of which sequence functions are 'basic'.

Terry J. Reedy




From http  Sat Jan 24 03:59:56 2004
From: http (Paul Rubin)
Date: 24 Jan 2004 00:59:56 -0800
Subject: efficient matching of elements a list
References: <pkqQb.2735$KU5.1436@nwrddc02.gnilink.net>
Message-ID: <7xzncd67sj.fsf@ruckus.brouhaha.com>

omission9 <omission9 at invalid.email.info> writes:

> Suppose I have a lists of tuples
> A_LIST=[(1,6,7),(7,4,2),(7,9,2),(1,5,5),(1,1,1)]
> and an int
> i=1
> What is the fastest way in python to get out all the tuples from the
> list whose first element  is equal to i?

t = [x for x in A_LIST if x[0] == i]

> Seems to be very slow and there must be some super quick pythonic way
> to do this maybe?
> Any avice would be much appreciated!!

Maybe there's some obscure faster way to do it but if you're really
in a hurry, use psyco or pyrex or write a C extension.


From featherstone80 at hotmail.com  Thu Jan 15 19:34:14 2004
From: featherstone80 at hotmail.com (Narsil)
Date: 15 Jan 2004 16:34:14 -0800
Subject: Quick question.....
References: <mailman.370.1074115102.12720.python-list@python.org>
Message-ID: <379178f1.0401151634.556bb405@posting.google.com>

I tried that.  I get the following error message

Traceback (most recent call last):
  File "E:\python\fun4b.py", line 80, in ?
    menu()
  File "E:\University\python\assign4b.py", line 49, in menu
    print sum(weektotlist)
NameError: global name 'sum' is not defined

What did I do wrong?

TomN

"Batista, Facundo" <FBatista at uniFON.com.ar> wrote in message news:<mailman.370.1074115102.12720.python-list at python.org>...
> featherstone80 wrote:
> 
> #- numberlist = [10, 2, 5, 7, 3, 46, 4, 5, 87, 5]
> #- 
> #- How would I get the total, and how would I get the average?
> 
> 
> Python 2.3 (#46, Jul 29 2003, 18:54:32) [MSC v.1200 32 bit (Intel)] on win32
> ...
> >>> numberlist = [10, 2, 5, 7, 3, 46, 4, 5, 87, 5]
> >>> sum(numberlist)
>  174
> >>> len(numberlist)
>  10
> >>> sum(numberlist)/len(numberlist)
>  17
> >>> from __future__ import division
> >>> sum(numberlist)/len(numberlist)
> 17.399999999999999
> 
> .	Facundo


From eric.brunel at N0SP4M.com  Wed Jan 21 13:16:09 2004
From: eric.brunel at N0SP4M.com (Eric Brunel)
Date: Wed, 21 Jan 2004 19:16:09 +0100
Subject: Tkinter bitmap bug ?
References: <a7a67196.0401210914.1c227978@posting.google.com>
Message-ID: <bumf5u$ovj$1@news-reader5.wanadoo.fr>

klappnase wrote:
> Hello everyone,
> 
> I have seen several threads here on this problem, but still cannot figure out
> the solution. I want to create a window icon for a Tkinter application and tried
> several things that are supposed to work. Here is a little demo of what I tried:
> 
> #################################from Tkinter import *
> 
> icon1 = ('''#define im_width 26
> #define im_height 25
> static char im_bits[] = {
> 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x70,0x00,0x00,0x00,0x7e,
> 0x00,0x00,0xe0,0x7f,0x00,0x00,0xff,0x63,0x00,0x00,0x3f,0x70,0x00,0x00,0x03,
> 0x7e,0x00,0x00,0xe3,0x7f,0x00,0x00,0xff,0x63,0x00,0x00,0x3f,0x60,0x00,0x00,
> 0x03,0x60,0x00,0x00,0x03,0x60,0x00,0x00,0x03,0x78,0x00,0x00,0x03,0x7c,0x00,
> 0x00,0x03,0x7e,0x00,0xc0,0x03,0x7e,0x00,0xe0,0x03,0x3c,0x00,0xf0,0x03,0x18,
> 0x00,0xf0,0x03,0x00,0x00,0xe0,0x01,0x00,0x00,0xc0,0x00,0x00,0x00,0x00,0x00,
> 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 };''')
> 
> icon2 = ('R0lGODlhEAAMAKEAAAAAAAC18////////yH5BAEAAAIALAAAAAAQAAwAAAI'
>         'glIFgyxcfVFsAQtmS3rjaH1Hg141WaT5ouprt2HHcUgAAOw==')
> 
> def test0():
>     root = Tk()
>     root.iconbitmap('@/somepath/window_icon.xbm')
>     root.mainloop()
> 
> def test1():
>     root = Tk()
>     root.bit = BitmapImage(data=icon1)
>     root.iconbitmap(root.bit)
>     root.mainloop()
> 
> def test2():
>     root = Tk()
>     bit = BitmapImage(data=icon1)
>     img = PhotoImage(data=icon2)
>     try:
>         b1 = Button(root, bitmap=bit)
>         b1.icon_ref = bit
>         b1.pack()
>     except:
>         pass
>     try:
>         b2 = Button(root, image=img)
>         b2.icon_ref = img
>         b2.pack()
>     except:
>         pass
>     root.mainloop()
> 
> def test3():
>     root = Tk()
>     img = PhotoImage(data=icon2)
>     top = Toplevel(root)
>     l = Label(top, image=img)
>     l.icon_ref = img
>     l.pack()
>     root.iconwindow(top)
>     root.mainloop()
> 
> if __name__=='__main__':
>     test0()
>    
> #############################################
> 
> Running the test0() function works fine, however I wanted to not to carry an
> external bitmap file around, so I tried to pass the bitmap data to a BitmapImage
> object.

As you saw, this won't work: the only way I found to set an iconbitmap on a 
window is using the '@/path/to/file' syntax. Why not keep the data for your 
image in the code and generate a temporary file from this data? Then you can use 
the '@...' stuff without having to carry an external file everywhere. Just don't 
forget to delete the file when your application exits. We do that all the time 
and it works quite fine.

HTH
-- 
- Eric Brunel <eric dot brunel at pragmadev dot com> -
PragmaDev : Real Time Software Development Tools - http://www.pragmadev.com



From peter at engcorp.com  Mon Jan 12 09:34:34 2004
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 12 Jan 2004 09:34:34 -0500
Subject: Writing Files
References: <AJULb.1380$q4.460@newsread3.news.atl.earthlink.net>
Message-ID: <4002B07A.47479678@engcorp.com>

Lucas Raab wrote:
> 
> What is the best way to go about writing to files?? Whenever I insert a
> statement to write results to a file there's nothing in it. Any
> suggestions??

Always post example code and/or the exception traceback when asking such
a question.

You might also take a glance at http://www.catb.org/~esr/faqs/smart-questions.html

-Peter


From adalke at mindspring.com  Sat Jan  3 13:25:24 2004
From: adalke at mindspring.com (Andrew Dalke)
Date: Sat, 03 Jan 2004 18:25:24 GMT
Subject: Abstract Syntax Tree conundrum
References: <f70e3538.0401021114.1f57622e@posting.google.com>
Message-ID: <oODJb.17938$lo3.17733@newsread2.news.pas.earthlink.net>

Lonnie Princehouse:
> The compiler's AST implementation seems better for (1), but I can't
> for the life of me figure out how to compile it into a code object,

Does this help?

>>> a
Traceback (most recent call last):
  File "<pyshell#20>", line 1, in -toplevel-
    a
NameError: name 'a' is not defined
>>> import compiler
>>> compiler.parse("a=3+4")
Module(None, Stmt([Assign([AssName('a', 'OP_ASSIGN')], Add((Const(3),
Const(4))))]))
>>> x=_
>>> x.filename = "<string>"
>>> compiler.pycodegen.ModuleCodeGenerator(x).getCode()
<code object <module> at 00A28360, file "<string>", line 1>
>>> c = _
>>> exec c
>>> a
7
>>>

The compiler module is somewhat cumbersome (eg, the need to force
a 'filename' attribute above) and woefully underdocumented, but much
better to use than the results of the parser structure.

> and there's not even an apparent way to convert it back into source (I
> suppose I could write a function to do this, but it seems like there
> should be a better way).

That one I don't know about.  decompyle  seems like your best bet.

                    Andrew
                    dalke at dalkescientific.com




From mcfletch at rogers.com  Fri Jan 30 04:08:18 2004
From: mcfletch at rogers.com (Mike C. Fletcher)
Date: Fri, 30 Jan 2004 04:08:18 -0500
Subject: what is the use of weakref?
In-Reply-To: <1jipe1-fqq.ln1@news.slu.edu.ph>
References: <1jipe1-fqq.ln1@news.slu.edu.ph>
Message-ID: <401A1F02.7030101@rogers.com>

Well, for the last few versions of Python, it's primary use has been 
finding ways to crash the interpreter ;) .  Seriously, they are used 
when you want to avoid having cycles in your data structures, so that, 
for instance, variables will be immediately garbage collected rather 
than hanging around waiting for the garbage collector to find them.

They are also useful in some decoration patterns where you want to cache 
compiled values for a large number of objects with uncertain lifetimes.  
If you were to use hard-refs to the client objects from the cache you'd 
keep the objects alive (presumably the cache is reachable all the time). 
A weak-ref allows the client objects to go away so that the cached 
values can be cleared and the memory reclaimed (OpenGLContext does this 
with compiled scenegraph node representations, btw).

HTH,
Mike

ali wrote:

>i've seen a lot of times in programs but until now i still dont know the use
>of the weakref module... any help will be appreciated... thanks...
>
>ali
>  
>
_______________________________________
  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://members.rogers.com/mcfletch/





From peter at engcorp.com  Tue Jan  6 08:30:33 2004
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 06 Jan 2004 08:30:33 -0500
Subject: question: Python or Lua for rejuvenation of old PCs?
References: <mailman.23.1073022342.12720.python-list@python.org>
Message-ID: <3FFAB879.32FBC22B@engcorp.com>

David LeBlanc wrote:
> 
> I have seen discussion of Python being run on small x86 systems with 64mb of
> ram and a 64mb CF card "disk". 

More specifically, we have Python running on 100MHz 486-compatible systems with
32MB of RAM and 32MB of CF, without significant issues.

-Peter


From mhammond at skippinet.com.au  Mon Jan 26 18:16:14 2004
From: mhammond at skippinet.com.au (Mark Hammond)
Date: Tue, 27 Jan 2004 10:16:14 +1100
Subject: python service running on Win Xp,
 but failing on Win NT Workstation :(
In-Reply-To: <bv3uqr$5ji$1@nemesis.news.tpi.pl>
References: <bv3bs0$la0$1@atlantis.news.tpi.pl>
	<bv3uqr$5ji$1@nemesis.news.tpi.pl>
Message-ID: <bv4744$2dbl$1@arachne.labyrinth.net.au>

Ringwraith wrote:

> maybe another hint ...
> 
> While installing I got the error message:
> 
> "The procedure entry point RegisterServiceCtrlHandlerExW
> could not be located in the dynamic link library ADVAPI32.dll"
> 

Slowly but surely, support for Win95 and NT are being dropped off 
(generally in the process of enhancing the framework, as was done for 
services in this case).  I would accept contributions that fall-back to 
the previous behaviour, but I have no problems with suggesting that 
people who use a very old OS can also use an old Python/win32all to suit.

Mark.



From skip at pobox.com  Wed Jan 21 19:37:17 2004
From: skip at pobox.com (Skip Montanaro)
Date: Wed, 21 Jan 2004 18:37:17 -0600
Subject: shelve slow in python 2.3.3 for windows
In-Reply-To: <322u00ppo44l8g003dgtcu8lna432to411@4ax.com>
References: <u1qt00t4nbubknpq2lmeovdk36gu9ekt3r@4ax.com>
	<mailman.614.1074721650.12720.python-list@python.org>
	<322u00ppo44l8g003dgtcu8lna432to411@4ax.com>
Message-ID: <16399.6973.312882.309012@montanaro.dyndns.org>


    >> whichdb.whichdb("a") 
    >> report under both versions?  My wild-ass guess is that the underlying
    >> anydbm module finds dumbdbm under 2.3.3 and something more industrial
    >> strength like bsddb under 2.2.

    Marco> Skip,
    Marco> you are right!

Sort of.

    Marco> Under 2.3.3: 'dbhash'

    Marco> Under 2.2: 'bsddb185'

'dbhash' and 'bsddb185' are really the same beast.

    Marco> Now the question is: is it possible to use bsddb185 with python
    Marco> 2.3.3?

You're barking up the wrong tree.  That's not the problem.

Skip



From jmeile at hotmail.com  Tue Jan  6 13:27:23 2004
From: jmeile at hotmail.com (Josef Meile)
Date: Tue, 6 Jan 2004 19:27:23 +0100
Subject: Programming language from python
References: <mailman.31.1072763540.8134.python-list@python.org>
	<4f0a9fdb.0312300447.47c421ec@posting.google.com>
Message-ID: <3ffafe0b$1@pfaff2.ethz.ch>

> I've heard they have some very good programming languages over at
> Venus :-)
>
> A programming language is like a tool, it's good for some things and
> not good for other things. As a general purpose langauge it's as good
> a they come.
I agree. I think you can't say that a language is the best because you
like it. Indeed, you can't do such affirmation, for languages have their
weaknesses too. Afterall languages are made by people and we aren't
perfect.

Another think is that you can say that a language is good because it's
easy to code (like python), or because it offers a programming environment
like the visual suite of microsoft, or because it's fast when excecuting
the code written on it, or because of its comunity, or because of its number
of modules. I think there are many factors and needs depending on the person
who is going to use it. So, for each person this selection will be
different. Anyway,
sometime ago, somebody posted this links here:

http://www.bagley.org/~doug/shootout/index2.shtml
http://www.ipd.uka.de/~prechelt/Biblio/jccpprt_computer2000.pdf

They may help you on your election.

Regards,
Josef




From http  Mon Jan 19 15:31:00 2004
From: http (Paul Rubin)
Date: 19 Jan 2004 12:31:00 -0800
Subject: secure unpickle?
References: <bufkot$96vl$1@netnews.upenn.edu> <8765f8xe8p.fsf@pobox.com>
Message-ID: <7xsmiby92z.fsf@ruckus.brouhaha.com>

jjl at pobox.com (John J. Lee) writes:
> marshal
> 
> The docs have similar warnings, though.

Marshal has an additional problem, which is that the format can change
incompatibly between one Python version and another.  So if you use
marshal for object persistence and upgrade your Python instance, you
can be screwed.

There is no clearly good solution to this issue.  There are a couple
of bug entries in Sourceforge about it.


From bkelley at wi.mit.edu  Thu Jan  8 19:28:59 2004
From: bkelley at wi.mit.edu (Brian Kelley)
Date: Fri, 09 Jan 2004 00:28:59 GMT
Subject: MySQLDB multiple cursor question
In-Reply-To: <b840abf4.0401081132.6c57c82f@posting.google.com>
References: <3ffc6160$0$572$b45e6eb0@senator-bedfellow.mit.edu>
	<3ffd7dbe$0$560$b45e6eb0@senator-bedfellow.mit.edu>
	<b840abf4.0401081132.6c57c82f@posting.google.com>
Message-ID: <eBmLb.1180$Rc4.4737@attbi_s54>

AdSR wrote:
> 
> See PEP 249, read about the "threadsafety" global variable.
> 
There you have it.  MySQLdb has a threadsafety level of 1 which means 
that connections can't be shared but the module can.

I guess I'm doing it the right way now :)


> HTH,
> 
> AdSR



From peter at engcorp.com  Fri Jan  9 09:12:38 2004
From: peter at engcorp.com (Peter Hansen)
Date: Fri, 09 Jan 2004 09:12:38 -0500
Subject: Twisted or Medusa or Zope
References: <425cc8d1.0401070808.14690325@posting.google.com>
	<y11Lb.1333$Mb5.23891@news2.e.nsc.no>
	<3FFD7159.55630AE0@engcorp.com> <6AlLb.134$hd.7718@news2.e.nsc.no>
Message-ID: <3FFEB6D6.BF92551E@engcorp.com>

Thomas Weholt wrote:
> 
> "Peter Hansen" <peter at engcorp.com> wrote:
> > Twisted is similar to Medusa in about the same way that Linux is similar
> to, say, CPM...
> 
> Ok, my point was that they are similar type of frameworks, if we compare
> medusa and the webserver-part of Twisted. They don't do much without a bit
> of work/coding. Unlike Zope which comes with a UI, user-management etc
> running the minute you finish the installation procedure.
> 
> I might not know the entire technical aspect of medusa and twisted, not
> really enough to compare them in detail. I was referring to the way a
> programmer will have to use them, based on my experience using the two. In
> that regard they're somewhat similar and different from zope. If I'm
> completly off track here feel free to enlighten me.

Thomas, you're completely ON track here... I just wanted to emphasize that
Twisted is much more polished and sophisticated.  I'd even have to say, 
as a programmer using them, that Twisted does actually provide a simpler and 
cleaner API.  It and Medusa are much closer in concept than either is to
Zope, though, as you say.

-Peter


From mnations at airmail.net  Sat Jan  3 16:36:30 2004
From: mnations at airmail.net (Marc)
Date: 3 Jan 2004 13:36:30 -0800
Subject: Freezing win32com with multi platform/version support
References: <4378fa6f.0312310903.1ea2d50b@posting.google.com>
Message-ID: <4378fa6f.0401031336.66ddabb5@posting.google.com>

ttt

Hopefully someone will reply to my message in a bottle...


From sombDELETE at pobox.ru  Sat Jan 10 09:08:21 2004
From: sombDELETE at pobox.ru (Serge Orlov)
Date: Sat, 10 Jan 2004 17:08:21 +0300
Subject: Python And Internationalization maybe a pre-pep?
References: <3ffede43$0$563$b45e6eb0@senator-bedfellow.mit.edu>
	<3FFF36A1.40303@v.loewis.de> <YSKLb.10550$5V2.17781@attbi_s53>
Message-ID: <btp108$1bfs$1@nadya.doma>


"Brian Kelley" <bkelley at wi.mit.edu> wrote in message news:YSKLb.10550$5V2.17781 at attbi_s53...
> Martin v. Loewis wrote:
> > Brian Kelley wrote:
> >> So, am I being silly, redundant or just plain different?
> >
> > I do wonder what kind of application are you looking at. How
> > many strings? How many different translators? How often do
> > the strings change? Are the strings presented to the immediate
> > user of the application sitting in front of the terminal where
> > the application is running, or are there multiple simultaneous
> > accesses to the same application, e.g. through a Web server?
>
> The number of strings doesn't really matter I think as long as you can
> automatically generate the ones that need to be translated.  Both
> mechanisms do this.
>
> I hadn't previously thought about multiple simultaneous users but this
> could fit in nicely.  After some experimentation with the string
> classes, it turns out that as long as the __repr__ of the string stays
> unchanged, i.e. in this case the original english version, then the
> __str__ of a string (the locale specific changes) can change willy-nilly
> and not affect things like dictionaries and class name lookups.

If you keep translator instance in a global variable then users won't
be able to select different languages.

> I suppose that there really isn't much difference in the long run as
> long as tools exist that make these translations relatively easy but I
> can't quite shake the thought of trying to teach my brother, a
> biologist, how to enable localization in his code in an easy manner.
>
> Anyway, you have made good points and maybe all I need are some better
> integrated tools for localizing my applications.

Exactly. At the link you provided, the description of creating database of
strings for translation takes 120 words whereas the whole text is about
2500 words. And I beleive collection of strings to translate should take
place only before a release. How often is it?

>
> Since you brought it up, how does gettext handle multiple users?  Does
> each user get a different gettext library (dll) instance?

No. Different translator class instances. Your pre-pep doesn't help
here.

-- Serge.





From martin at v.loewis.de  Fri Jan 16 02:38:23 2004
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Fri, 16 Jan 2004 08:38:23 +0100
Subject: Binary strings, unicode and encodings
In-Reply-To: <265368cb.0401151138.37a3a47b@posting.google.com>
References: <265368cb.0401151138.37a3a47b@posting.google.com>
Message-ID: <400794EF.8080002@v.loewis.de>

Laurent Therond wrote:

> Now, if I write bencode('failure reason') into a socket, what will I get
> on the other side of the connection?

Jp has already explained this, but let me stress his observations.

> a) A sequence of bytes where each byte represents an ASCII character

A sequence of bytes, period. 'failure reason' is a byte string. The
bytes in this string are literally copied from the source code .py file
to the cStringIO object.

If your source code was in an encoding that is an ASCII superset
(such as ascii, iso-8859-1, cp1252), then yes: the text 'failure reason'
will come out as a byte string representing ASCII characters.

Python has a second, independent string type, called unicode. Literals
of that type are not simply written in quotes, but with a leading u''.

You should never use the unicode type in a place where byte strings
are expected. Python will apply the system default encoding to these,
which gives exceptions if the Unicode characters are outside the 
characters supported in the system default encoding (which is us-ascii).

You also should avoid byte string literals with non-ASCII characters
such as 'string?'; use unicode literals. The user invoking your script
may use a different encoding on his system, so he would get moji-bake,
as the last character in the string literal does *not* denote
LATIN SMALL LETTER E WITH ACUTE, but instead denotes the byte '\xe9'
(which is that character only if you use a latin-1-like encoding).

HTH,
Martin



From tleese22 at yahoo.com  Sun Jan 18 18:16:14 2004
From: tleese22 at yahoo.com (Taylor Leese)
Date: Sun, 18 Jan 2004 15:16:14 -0800 (PST)
Subject: FreeBSD 4.8 and Python-2.2.3 compiling error
Message-ID: <20040118231614.67193.qmail@web60506.mail.yahoo.com>

I'm hoping somebody can point me in the right
direction. I am getting this error when trying to
compile Python-2.2.3 on FreeBSD 4.8:

gcc -c -DNDEBUG -g -O3 -Wall -Wstrict-prototypes -I.
-I./Include -DHAVE_CONFIG_H  -o Modules/python.o
Modules/python.c
In file included from Include/Python.h:62,
                 from Modules/python.c:3:
Include/pyport.h:462: #error "could not set LONG_MAX
in pyport.h"
*** Error code 1

Stop in /home/cleverli/public_html/Python-2.2.3.
gcc -c -DNDEBUG -g -O3 -Wall -Wstrict-prototypes -I.
-I./Include -DHAVE_CONFIG_H  -o Modules/python.o
Modules/python.c
In file included from Include/Python.h:62,
                 from Modules/python.c:3:
Include/pyport.h:462: #error "could not set LONG_MAX
in pyport.h"
*** Error code 1

Here's the config.log:
This file contains any messages produced by compilers
while
running configure, to aid debugging if configure makes
a mistake.

configure:628: checking MACHDEP
configure:671: checking for --without-gcc
configure:723: checking for --with-cxx=<compiler>
configure:760: checking for c++
configure:795: checking whether the C++ compiler (c++ 
) works
configure:811: c++ -o conftest    conftest.C  1>&5
configure:837: checking whether the C++ compiler (c++ 
) is a cross-compiler
configure:854: checking for gcc
configure:967: checking whether the C compiler (gcc  )
works
configure:983: gcc -o conftest    conftest.c  1>&5
configure:1009: checking whether the C compiler (gcc 
) is a cross-compiler
configure:1014: checking whether we are using GNU C
configure:1042: checking whether gcc accepts -g
configure:1076: checking how to run the C preprocessor
configure:1156: checking for AIX
configure:1181: checking for minix/config.h
configure:1230: checking for Cygwin environment
configure:1263: checking for mingw32 environment
configure:1294: checking for executable suffix
configure:1325: checking for --with-suffix
configure:1343: checking for case-insensitive build
directory
configure:1381: checking LIBRARY
configure:1414: checking LINKCC
configure:1443: checking LDLIBRARY
configure:1480: checking for ranlib
configure:1513: checking for ar
configure:1583: checking for a BSD compatible install
configure:1648: checking for --with-pydebug
configure:1721: checking whether gcc accepts
-OPT:Olimit=0
configure:1758: checking whether gcc accepts -Olimit
1500
configure:1799: checking whether pthreads are
available without options
configure:1851: checking whether gcc accepts -Kpthread
configure:1898: checking for ANSI C header files
configure:2023: checking for dlfcn.h
configure:2023: checking for fcntl.h
configure:2023: checking for grp.h
configure:2023: checking for limits.h
configure:2023: checking for langinfo.h
configure:2023: checking for locale.h
configure:2023: checking for ncurses.h
configure:2023: checking for poll.h
configure:2023: checking for pthread.h
configure:2023: checking for signal.h
configure:2023: checking for stdarg.h
configure:2023: checking for stddef.h
configure:2023: checking for stdlib.h
configure:2023: checking for thread.h
configure:2023: checking for unistd.h
configure:2023: checking for utime.h
configure:2023: checking for termios.h
configure:2023: checking for sys/audioio.h
configure:2023: checking for sys/file.h
configure:2023: checking for sys/lock.h
configure:2023: checking for sys/modem.h
configure:2023: checking for db_185.h
configure:2023: checking for db.h
configure:2023: checking for sys/param.h
configure:2023: checking for sys/poll.h
configure:2023: checking for sys/select.h
configure:2023: checking for sys/socket.h
configure:2023: checking for sys/time.h
configure:2023: checking for sys/times.h
configure:2023: checking for sys/un.h
configure:2023: checking for sys/utsname.h
configure:2023: checking for sys/wait.h
configure:2023: checking for pty.h
configure:2023: checking for term.h
configure:2023: checking for libutil.h
configure:2023: checking for ndbm.h
configure:2023: checking for db1/ndbm.h
configure:2023: checking for gdbm/ndbm.h
configure:2023: checking for sys/resource.h
configure:2023: checking for netpacket/packet.h
configure:2070: checking for dirent.h that defines DIR
configure:2108: checking for opendir in -ldir
configure:2194: checking for clock_t in time.h
configure:2235: checking for mode_t
configure:2268: checking for off_t
configure:2301: checking for pid_t
configure:2334: checking return type of signal
handlers
configure:2375: checking for size_t
configure:2408: checking for uid_t in sys/types.h
configure:2444: checking size of int
configure:2483: checking size of long
configure:2522: checking size of void *
configure:2561: checking size of char
configure:2600: checking size of short
configure:2639: checking size of float
configure:2678: checking size of double
configure:2717: checking size of fpos_t
configure:2757: checking for long long support
configure:2767: gcc -c -g -O2  conftest.c 1>&5
configure:2781: checking size of long long
configure:2822: checking for uintptr_t support
configure:2832: gcc -c -g -O2  conftest.c 1>&5
configure: In function `main':
configure:2828: syntax error before `x'
configure:2828: `x' undeclared (first use in this
function)
configure:2828: (Each undeclared identifier is
reported only once
configure:2828: for each function it appears in.)
configure:2828: `uintptr_t' undeclared (first use in
this function)
configure:2828: syntax error before `0'
configure: failed program was:
#line 2825 "configure"
#include "confdefs.h"

int main() {
uintptr_t x; x = (uintptr_t)0;
; return 0; }
configure:2888: checking size of off_t
configure:2930: checking whether to enable large file
support
configure:2945: checking size of time_t
configure:2993: checking for pthread_t
configure:3003: gcc -c -g -O2  conftest.c 1>&5
configure:3015: checking size of pthread_t
configure:3059: checking for --enable-toolbox-glue
configure:3111: checking for --enable-framework
configure:3134: checking for dyld
configure:3157: checking SO
configure:3172: checking LDSHARED
configure:3241: checking CCSHARED
configure:3277: checking LINKFORSHARED
configure:3322: checking CFLAGSFORSHARED
configure:3338: checking for dlopen in -ldl
configure:3385: checking for shl_load in -ldld
configure:3468: checking for t_open in -lnsl
configure:3508: checking for socket in -lsocket
configure:3595: checking for --with-libs
configure:3612: checking for --with-signal-module
configure:3638: checking for --with-dec-threads
configure:3655: checking for --with-threads
configure:3713: checking for _POSIX_THREADS in
unistd.h
configure:3741: checking for mach/cthreads.h
configure:3780: checking for --with-pth
configure:3806: checking for pthread_create in
-lpthread
configure:3818: gcc -o conftest -g -O2   conftest.c 
-lpthread 1>&5
/usr/libexec/elf/ld: cannot find -lpthread
configure: failed program was:
#line 3808 "configure"
#include "confdefs.h"
#include <pthread.h>

void * start_routine (void *arg) { exit (0); }
int main() {

pthread_create (NULL, NULL, start_routine, NULL)
; return 0; }
configure:3835: checking for pthread_detach
configure:3888: checking for kernel/OS.h
configure:3927: checking for pthread_create in
-lpthreads
configure:3972: checking for pthread_create in -lc_r
configure:4183: checking if PTHREAD_SCOPE_SYSTEM is
supported
configure:4231: checking for pthread_sigmask
configure:4286: checking for usconfig in -lmpc
configure:4332: checking for thr_create in -lthread
configure:4400: checking if --enable-ipv6 is specified
configure:4439: gcc -o conftest -g -O2   conftest.c 
-lc_r 1>&5
/usr/lib/libc.so: WARNING!  setkey(3) not present in
the system!
/usr/lib/libc.so: warning: this program uses gets(),
which is unsafe.
/usr/lib/libc.so: warning: mktemp() possibly used
unsafely; consider using mkstemp()
/usr/lib/libc.so: WARNING!  des_setkey(3) not present
in the system!
/usr/lib/libc.so: WARNING!  encrypt(3) not present in
the system!
/usr/lib/libc.so: warning: tmpnam() possibly used
unsafely; consider using mkstemp()
/usr/lib/libc.so: warning: this program uses
f_prealloc(), which is not recommended.
/usr/lib/libc.so: WARNING!  des_cipher(3) not present
in the system!
/usr/lib/libc.so: warning: tempnam() possibly used
unsafely; consider using mkstemp()
configure:4456: checking if RFC2553 API is available
configure:4467: gcc -c -g -O2  conftest.c 1>&5
configure:4497: checking ipv6 stack type
configure:4662: checking for --with-cycle-gc
configure:4684: checking for --with-pymalloc
configure:4703: checking for --with-wctype-functions
configure:4725: checking for --with-sgi-dl
configure:4749: checking for --with-dl-dld
configure:4778: checking for dlopen
configure:4835: checking DYNLOADFILE
configure:4866: checking MACHDEP_OBJS
configure:4889: checking for alarm
configure:4889: checking for chown
configure:4889: checking for chroot
configure:4889: checking for clock
configure:4889: checking for confstr
configure:4889: checking for ctermid
configure:4889: checking for ctermid_r
configure:4889: checking for execv
configure:4889: checking for flock
configure:4889: checking for fork
configure:4889: checking for fsync
configure:4889: checking for fdatasync
configure:4889: checking for fpathconf
configure:4889: checking for ftime
configure:4889: checking for ftruncate
configure:4889: checking for gai_strerror
configure:4889: checking for getgroups
configure:4889: checking for getlogin
configure:4889: checking for getpeername
configure:4889: checking for getpid
configure:4889: checking for getpwent
configure:4889: checking for getwd
configure:4889: checking for hstrerror
configure:4889: checking for inet_pton
configure:4889: checking for kill
configure:4889: checking for link
configure:4889: checking for lstat
configure:4889: checking for mkfifo
configure:4889: checking for mktime
configure:4889: checking for mremap
configure:4889: checking for nice
configure:4889: checking for pathconf
configure:4889: checking for pause
configure:4889: checking for plock
configure:4889: checking for poll
configure:4889: checking for pthread_init
configure:4889: checking for putenv
configure:4889: checking for readlink
configure:4889: checking for select
configure:4889: checking for setegid
configure:4889: checking for seteuid
configure:4889: checking for setgid
configure:4889: checking for setgroups
configure:4889: checking for setlocale
configure:4889: checking for setregid
configure:4889: checking for setreuid
configure:4889: checking for setsid
configure:4889: checking for setpgid
configure:4889: checking for setuid
configure:4889: checking for setvbuf
configure:4889: checking for snprintf
configure:4889: checking for sigaction
configure:4889: checking for siginterrupt
configure:4889: checking for sigrelse
configure:4889: checking for strftime
configure:4889: checking for strptime
configure:4889: checking for symlink
configure:4889: checking for sysconf
configure:4889: checking for tcgetpgrp
configure:4889: checking for tcsetpgrp
configure:4889: checking for tempnam
configure:4889: checking for timegm
configure:4889: checking for times
configure:4889: checking for tmpfile
configure:4889: checking for tmpnam
configure:4889: checking for tmpnam_r
configure:4889: checking for truncate
configure:4889: checking for uname
configure:4889: checking for unsetenv
configure:4889: checking for waitpid
configure:4889: checking for _getpty
configure:4889: checking for getpriority
configure:4947: checking for openpty
configure:4997: checking for openpty in -lutil
configure:5045: checking for forkpty
configure:5145: checking for fseek64
configure:5145: checking for fseeko
configure:5145: checking for fstatvfs
configure:5145: checking for ftell64
configure:5145: checking for ftello
configure:5145: checking for statvfs
configure:5201: checking for dup2
configure:5201: checking for getcwd
configure:5201: checking for strdup
configure:5201: checking for strerror
configure:5201: checking for memmove
configure:5258: checking for getpgrp
configure:5312: gcc -c -g -O2  conftest.c 1>&5
configure: In function `main':
configure:5308: too many arguments to function
`getpgrp'
configure: failed program was:
#line 5305 "configure"
#include "confdefs.h"
#include <unistd.h>
int main() {
getpgrp(0);
; return 0; }
configure:5331: checking for setpgrp
configure:5385: gcc -c -g -O2  conftest.c 1>&5
configure:5404: checking for gettimeofday
configure:5458: gcc -c -g -O2  conftest.c 1>&5
configure:5480: checking for getaddrinfo
configure:5496: gcc -o conftest -g -O2   conftest.c 
-lc_r -lutil 1>&5
/usr/lib/libc.so: WARNING!  setkey(3) not present in
the system!
/usr/lib/libc.so: warning: this program uses gets(),
which is unsafe.
/usr/lib/libc.so: warning: mktemp() possibly used
unsafely; consider using mkstemp()
/usr/lib/libc.so: WARNING!  des_setkey(3) not present
in the system!
/usr/lib/libc.so: WARNING!  encrypt(3) not present in
the system!
/usr/lib/libc.so: warning: tmpnam() possibly used
unsafely; consider using mkstemp()
/usr/lib/libc.so: warning: this program uses
f_prealloc(), which is not recommended.
/usr/lib/libc.so: WARNING!  des_cipher(3) not present
in the system!
/usr/lib/libc.so: warning: tempnam() possibly used
unsafely; consider using mkstemp()
configure:5501: checking getaddrinfo bug
configure:5596: gcc -o conftest -g -O2   conftest.c 
-lc_r -lutil 1>&5
/usr/lib/libc.so: WARNING!  setkey(3) not present in
the system!
/usr/lib/libc.so: warning: this program uses gets(),
which is unsafe.
/usr/lib/libc.so: warning: mktemp() possibly used
unsafely; consider using mkstemp()
/usr/lib/libc.so: WARNING!  des_setkey(3) not present
in the system!
/usr/lib/libc.so: WARNING!  encrypt(3) not present in
the system!
/usr/lib/libc.so: warning: tmpnam() possibly used
unsafely; consider using mkstemp()
/usr/lib/libc.so: warning: this program uses
f_prealloc(), which is not recommended.
/usr/lib/libc.so: WARNING!  des_cipher(3) not present
in the system!
/usr/lib/libc.so: warning: tempnam() possibly used
unsafely; consider using mkstemp()
configure:5636: checking for getnameinfo
configure:5691: checking whether time.h and sys/time.h
may both be included
configure:5726: checking whether struct tm is in
sys/time.h or time.h
configure:5760: checking for tm_zone in struct tm
configure:5830: checking for st_rdev in struct stat
configure:5864: checking for st_blksize in struct stat
configure:5898: checking for st_blocks in struct stat
configure:5935: checking for time.h that defines
altzone
configure:5969: checking whether sys/select.h and
sys/time.h may both be included
configure:5982: gcc -c -g -O2  conftest.c 1>&5
configure:5996: checking for addrinfo
configure:6030: checking for sockaddr_storage
configure:6067: checking whether char is unsigned
configure:6130: checking for working const
configure:6207: checking for working volatile
configure:6216: gcc -c -g -O2  conftest.c 1>&5
configure:6233: checking for working signed char
configure:6242: gcc -c -g -O2  conftest.c 1>&5
configure:6259: checking for prototypes
configure:6268: gcc -c -g -O2  conftest.c 1>&5
configure:6283: checking for variable length
prototypes and stdarg.h
configure:6302: gcc -c -g -O2  conftest.c 1>&5
configure:6318: checking for bad exec* prototypes
configure:6327: gcc -c -g -O2  conftest.c 1>&5
configure:6344: checking if sockaddr has sa_len member
configure:6355: gcc -c -g -O2  conftest.c 1>&5
configure:6371: checking for bad static forward
configure:6419: checking whether va_list is an array
configure:6434: gcc -c -g -O2  conftest.c 1>&5
configure:6450: checking for gethostbyname_r
configure:6631: checking for gethostbyname
configure:6697: checking for __fpu_control
configure:6743: checking for __fpu_control in -lieee
configure:6795: checking for --with-fpectl
configure:6820: checking for --with-libm=STRING
configure:6841: checking for --with-libc=STRING
configure:6865: checking for hypot
configure:6923: checking what malloc(0) returns
configure:6976: checking for wchar.h
configure:7017: checking size of wchar_t
configure:7061: checking what type to use for unicode
configure:7136: checking whether byte ordering is
bigendian
configure:7229: checking whether right shift extends
the sign bit
configure:7272: checking for getc_unlocked() and
friends
configure:7318: gcc -E  conftest.c >/dev/null
2>conftest.out
configure:7352: checking for rl_pre_input_hook in
-lreadline
configure:7397: checking for rl_completion_matches in
-lreadline
configure:7441: checking for broken nice()
configure:7487: checking whether mvwdelch is an
expression
configure:7525: checking whether WINDOW has _flags
configure:7571: checking for socklen_t
configure:7632: checking for build directories

- Taylor

__________________________________
Do you Yahoo!?
Yahoo! Hotjobs: Enter the "Signing Bonus" Sweepstakes
http://hotjobs.sweepstakes.yahoo.com/signingbonus



From swalters_usenet at yahoo.com  Mon Jan  5 14:17:52 2004
From: swalters_usenet at yahoo.com (Samuel Walters)
Date: Mon, 05 Jan 2004 19:17:52 GMT
Subject: intellectual property agreements and open source . was - Re:
	Why does this fail? [2]
References: <vvhdlm72386b3c@corp.supernews.com>
	<vvhkngs7oachad@corp.supernews.com>
	<84fc4588.0401042209.60cdb724@posting.google.com>
	<vvi2i8b89928fa@corp.supernews.com>
Message-ID: <pan.2004.01.05.19.16.41.995989@yahoo.com>

|Thus Spake Dave Murray On the now historical date of Sun, 04 Jan 2004
23:54:57 -0700|

> After re-reading this part, I can see that it is an idea that I like.
> How does participating in open source work for someone (me) who has
> signed the customary intellectual property agreement with the
> corporation that they work for? Since programming is part of my job,
> developing test solutions implemented on automatic test equipment (the
> hardware too) I don't know if I would/could be poison to an open source
> project. How does that work? I've never participated. If all the work is
> done on someone's own time, not using company resources,
> yadda-yadda-hadda-hadda, do corporate lawwwyaahhhs have a history of
> trying to dispute that and stake a claim? No doubt, many of you are in
> the same position.

IANAL (I Am Not A Lawyer)

As suggested elsewhere, consult your legal counsel.  Dig up that NDA.  Go
to the corporate lawwwyaahhhs and ask them to provide you with a clear
delineation in writing.  Have your legal counsel look over that document
to make sure it says what you think it says.  Be prepared to explain the
difference between general purpose tools and special purpose tools
directly related to the job.  Specifically, be prepared to explain how
contributing to general purpose tools can allow you to more quickly (and
inexpensively, time is money yadda-yadda) develop the special purpose
tools.  By contributing to, say, a web spider when your business involves
stress-testing web servers would allow you to leverage the knowledge and
work of others towards the companies goals.  As I understand it, no
open-source license has yet been tested in court, so your guess is as good
as anyone's about how much risk is involved.  That's why everyone is
waiting with baited breath over the SCO vs IBM fiasco.  It may be that
first legal test.  In fact, go to www.groklaw.net and read up on the SCO
vs IBM suit.  That's as good of a starting place as any.

Oh, and be sure to take a look at the specific license involved in a
project you contribute to.  Some licenses, like BSD, have little to no
restrictions on how an individual or company uses the code.  Most, such as
GPL require that you simply distribute the source and any changes you've
made if and only if you distribute the product or any products including
code from the project to a third party (in the case of companies, that
means outside the companies.) YMMV and again, IANAL

HTH

Sam Walters

-- 
Never forget the halloween documents.
http://www.opensource.org/halloween/
""" Where will Microsoft try to drag you today?
    Do you really want to go there?"""



From sombDELETE at pobox.ru  Sat Jan 10 08:12:10 2004
From: sombDELETE at pobox.ru (Serge Orlov)
Date: Sat, 10 Jan 2004 16:12:10 +0300
Subject: LC_MONETARY formatting
References: <pan.2004.01.09.22.19.04.935366@cfconsulting.ca>
	<3FFF38DE.1050603@v.loewis.de>
	<pan.2004.01.10.00.01.07.962349@cfconsulting.ca>
Message-ID: <btotmt$1899$1@nadya.doma>


"Colin Fox" <cfox at cfconsulting.ca> wrote in message news:pan.2004.01.10.00.01.07.962349 at cfconsulting.ca...
> On Sat, 10 Jan 2004 00:27:26 +0100, Martin v. Loewis wrote:
>
> > Colin Fox wrote:
> <..>
> >> I would like to be able to print "$12,345.60"
> >>
> >> Is there a format string, or function, or *something* that will take
> >> advantage of the monetary formatting info in the locale object?
> >
> > No.
>
> I can't believe that I'm the first person who ever wanted to print a
> number as a currency value. Why go to the great lengths of what's provided
> in localeconv(), only to leave it up to every single programmer to
> re-implement the solution? What a waste of time and effort!

Compared to the effort of all humanity to move forward the waste
of time and effort is dwarf <wink>

>
> I can't see any reason not to provide a monetary converter within locale,
> particularly when it's obviously got all the info it needs.

It's not as simple as you think. The proper way to do it is to have locale
aware money type.

>
> >
> > IOW, LC_MONETARY is useless for financial applications - if the amount
> > is in ?, using the locale's currency symbol would be wrong.
>
> That's true whether you use LC_MONETARY or not. Unless you know the units
> your number is in, you can't assign a symbol to it.

That's why LC_MONETARY (strfmon) is broken. Have you read strfmon manual?

> In my case, I have
> numbers that are always in either Canadian or US dollars, so the dollar
> sign is fine, and the thousands-separator value is fine.

You should have money class. It should be a subclass of FixedPoint class.
If you want to deal with Canadian or US dollars only it's as simple as:
class Dollars(FixedPoint):
    def __init__(self,amount):
        super(Dollars,self).__init__(amount)
    def __str__(self):
        if self < 0:
            return locale.format("-$%.2f",-self,True)
        else:
            return locale.format("$%.2f",self,True)


No warranty, of course, that it works and fulfills all your needs.
>>> locale.format("$%.2f",1000000000000,True)
'$1,000,000,000,000.00'

-- Serge.




From gsmith at oxfam.org.uk  Thu Jan 29 10:41:25 2004
From: gsmith at oxfam.org.uk (Graham)
Date: Thu, 29 Jan 2004 15:41:25 -0000
Subject: Pausing python programs
Message-ID: <40192a20$0$9389$ed9e5944@reading.news.pipex.net>

How can I cause a python program to pause/suspend execution for a period of
time?  I am checking status of an external system and only want to check
every second as opposed to my current which checks may times a secnod and
hogs my cpu in the process!!!

Thank you to anyone who can help.

Graham Smith

PeopleSoft Technical Team Leader
OXFAM GB
+44 (1865) 313255
gsmith at oxfam.org.uk





From mwh at python.net  Tue Jan  6 07:29:44 2004
From: mwh at python.net (Michael Hudson)
Date: Tue, 6 Jan 2004 12:29:44 GMT
Subject: Tkinter and OS X 10.3?
References: <bs7pt0$a98$1@panix1.panix.com>
	<a5415304.0312241644.59cedac2@posting.google.com>
	<7ba1cb43.0312301205.30156acf@posting.google.com>
	<btcbrv$fl4$1@nntp6.u.washington.edu>
	<btci6q$c1t$1@panix3.panix.com>
Message-ID: <m3fzet5kg8.fsf@pc150.maths.bris.ac.uk>

aahz at pythoncraft.com (Aahz) writes:

> In article <btcbrv$fl4$1 at nntp6.u.washington.edu>,
> Russell E. Owen <no at spam.invalid> wrote:
> >
> >You are almost certainly typing python instead of pythonw at the 
> >terminal prompt. This results in exactly the error described. (I'm not 
> >sure why there are two commands instead of python doing whatever extra 
> >magic pythonw does.)
> 
> I'd guess that pythonw imports more stuff; if you want to run a non-GUI
> application (say in a cron job), that would be wasteful.

pythonw connects to the window server.  If there is no window server
(logged in in text mode or via ssh) this could be considered a
disadvantage.  I don't know if it's possible to try to connect and do
something sensible if it fails, but given the separatedness of python
& pythonw, I'd guess not.

Cheers,
mwh

-- 
  If I had wanted your website to make noise I would have licked
  my finger and rubbed it across the monitor.
                           -- signature of "istartedi" on slashdot.org


From jjl at pobox.com  Tue Jan 20 09:49:25 2004
From: jjl at pobox.com (John J. Lee)
Date: 20 Jan 2004 14:49:25 +0000
Subject: personal document mgmt system idea
References: <b03e80d.0401200538.10fcf33a@posting.google.com>
Message-ID: <87wu7mwu8a.fsf@pobox.com>

sandskyfly at hotmail.com (Sandy Norton) writes:

> I have been mulling over an idea for a very simple python-based
> personal document management system. The source of this possible
> solution is the following typical problem:
> 
> I accumulate a lot of files (documents, archives, pdfs, images, etc.)
> on a daily basis and storing them in a hierarchical file system is
> simple but unsatisfactory:
> 
>        - deeply nested hierarchies are a pain to navigate 
>          and to reorganize
>        - different file systems have inconsistent and weak schemes 
>          for storing metadata e.g. compare variety of incompatible 
>          schemes in windows alone (office docs vs. pdfs etc.) .
> 
> I would like a personal document management system that:
[...]
> The system should promote the following simple pattern:
[...]

Pybliographer 2 is aiming at these features (but a lot more besides).
Work has been slow for a long while, but several new releases of
pyblio 1 have come out recently, and work is taking place on pyblio 2.
There are design documents on the web at pybliographer.org.  Why not
muck in and implement what you want with Pyblio?

[...]
> My initial prototyping efforts involved creating a single test table
> in
> mysql (later to include fields for dublin-core metadata elements) 
> and a BLOB field for the data itself. My present dev platform is
> windows XP pro, mysql 4.1.1-alpha,  MySQL-python connector v.0.9.2
> and python 2.3.3 . However, I will be testing the same app on Mac OS X
> and Linux Mandrake 9.2 as well.

ATM Pyblio only runs on GNOME, but that's going to change.


> The first problem I've run into is that mysql or the MySQL
> connector crashes when the size of one BLOB reaches a certain point:
> in this case an .avi file of 7.2 mb . 
> 
> Here's the code:
[...]
> _mysql_exceptions.OperationalError: (2006, 'MySQL server has gone
> away')
> >Exit code: 1
> 
> </traceback>
> 
> My Questions are:
> 
> - Is my test code at fault?
> 
> - Is this the wrong approach to begin with: i.e. is it a bad idea to
>   store the data itself in the database?

Haven't read your code, but the error certainly strongly suggests a
MySQL configuration problem.


John


From Florian.Lindner at xgm.de  Thu Jan 22 08:15:50 2004
From: Florian.Lindner at xgm.de (Florian Lindner)
Date: Thu, 22 Jan 2004 14:15:50 +0100
Subject: prog/lib to draw graphs
References: <buofpq$1ra$06$1@news.t-online.com>
	<buogqm$chaf$1@netnews.upenn.edu>
Message-ID: <buoi6g$2qm$07$1@news.t-online.com>

netnews.upenn.edu wrote:

> Florian Lindner wrote:
>> Hello,
>> I'm looking for a program or python library to draw graphs.
>> They should look like the that:
>> 
>> 
>> /--------\                         /--------\
>> | Node A | ------ belongs to ----> | Node B |
>> \--------/                         \--------/
>> 
>> Which is a result of the function call like that:
>> 
>> connectNodes(firstNode, secondNode, description, lineStyle)
>> connectNodes("Node A", "Node B", "belongs to", dashed)
>> 
>> It should have a open scalable vector format as output (DVI, SVG, PDF,
>> ...) and should be able to make automatic optimal placement of the items.
>> Do you know something like that?
>> Thx,
>> Florian
> 
> Try graphviz:
> 
>    http://www.research.att.com/sw/tools/graphviz/
> 
> 
> I think there's a python interface to graphviz floating around (Google
> it), but it's  trivial to write a Python routine that spits out valid
> Graphviz "dot" files.
> 
> In the case of your example, the contents of the dot file would be
> something like:
> 
> digraph G{
>      "Node A" -> "Node B" [label="belongs to"];
> }

Thanks! (to all)
Does GraphViz also support the automated optimal placement of nodes? I'll
have many nodes...
Thx,
Florian


From news at grauer-online.de  Sun Jan 18 09:12:46 2004
From: news at grauer-online.de (Uwe Grauer)
Date: Sun, 18 Jan 2004 15:12:46 +0100
Subject: Boa: printing source in the Editor
In-Reply-To: <4jwOb.40507$DF4.24648@amsnews02.chello.com>
References: <4jwOb.40507$DF4.24648@amsnews02.chello.com>
Message-ID: <bue48i$dts$1@online.de>

F.A. Pinkse wrote:
> Dear Group,
> 
> 
> Does the Editor of BOA has a print function?
> 
> If it has one, where is it placed in the menu hierarchy?
> 
> Thanks for the answers.
> 
> Frans.
> 
> 
Using boa 0.2.8 i see Print under the Edit menu of the Editor.

Uwe


From necromancer_stupidspambot at quanta1.world-vr_stupidspambot.com  Fri Jan 23 22:29:42 2004
From: necromancer_stupidspambot at quanta1.world-vr_stupidspambot.com (necromancer_stupidspambot at quanta1.world-vr_stupidspambot.com)
Date: Fri, 23 Jan 2004 22:29:42 -0500
Subject: get "yesterday's" date in iso format
References: <pan.2004.01.23.04.13.55.406832@quanta1.world-vr_stupidspambot.com>
	<877jzjb7o4.fsf@mrbun.watterson>
	<mailman.703.1074877241.12720.python-list@python.org>
Message-ID: <pan.2004.01.24.03.29.41.444467@quanta1.world-vr_stupidspambot.com>

On Fri, 23 Jan 2004 17:54:15 +0100, Gerrit Holl wrote:

> Tim Heaney wrote:
>> necromancer_stupidspambot at quanta1.world-vr_stupidspambot.com writes:
>> >
>> > I am trying to find a simple way to get "yesterday's" date.
>> 
>> Since time.time() gives the time in seconds since the epoch, you could
>> just subtract a day from that to get yesterday.
> 
> Even better:
> 
>>>> from datetime import date, timedelta
>>>> (date.today() - timedelta(1)).day
> 22

Excellent. I guess I skipped the timedela section of the datetime module.

Thanks a lot,
David




From pln at cosmic.stanford.edu  Mon Jan  5 19:40:15 2004
From: pln at cosmic.stanford.edu (Patrick L. Nolan)
Date: Tue, 6 Jan 2004 00:40:15 +0000 (UTC)
Subject: Grab input&output of program on Windows
Message-ID: <btd05f$5vg$1@news.Stanford.EDU>

I'm going nuts trying to port an application from Linux
to Windows.  We have a python/Tkinter script which runs
a C++ application.  It starts it with popen4 and 
communicates through the two pipes.  It reads text output
from stdout until a prompt appears, then sends commands
through stdin.

On Windows it seems to get all tangled up in the buffering
of the two streams.  When the script just reads stdout, it
seems to be OK.  As soon as the first command is sent to
stdin, stdout blocks forever.

I tried borrowing an idea from the Python Cookbok, recipe
9.6.  I made the streams nonblocking and put a call to
select in a loop.  The results were promising on Linux,
but there was a mysterious error message on Windows.
I think select works only for sockets, not pipes.

This seems like the sort of thing that might be solved by
expect.  Will that work?  Is there some other way?

-- 
*   Patrick L. Nolan                                          *
*   W. W. Hansen Experimental Physics Laboratory (HEPL)       * 
*   Stanford University                                       *


From miki.tebeka at zoran.com  Wed Jan 28 02:46:16 2004
From: miki.tebeka at zoran.com (Miki Tebeka)
Date: 27 Jan 2004 23:46:16 -0800
Subject: Best way to compare a list?
References: <7b454334.0401271739.59267018@posting.google.com>
Message-ID: <4f0a9fdb.0401272346.157e8960@posting.google.com>

Hello Faizan,

> What do you guys think?  The best/fastest way of comparing lists.

>>> l1 = range(10)
>>> l2 = range(10)
>>> l1 == l2
True

HTH.
Miki


From try_vanevery_at_mycompanyname at yahoo.com  Wed Jan 14 16:42:00 2004
From: try_vanevery_at_mycompanyname at yahoo.com (Brandon J. Van Every)
Date: Wed, 14 Jan 2004 13:42:00 -0800
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
	<K_YMb.10994$9k7.204413@news.xtra.co.nz>
	<bu1qq3$cu440$1@ID-207230.news.uni-berlin.de>
	<n22Nb.11299$9k7.210522@news.xtra.co.nz>
	<bu2pgs$d123a$1@ID-207230.news.uni-berlin.de>
	<4004EC9E.1E2E2893@alcyone.com>
	<23891c90.0401140223.344b22af@posting.google.com>
	<100bbb6kj9m03a4@corp.supernews.com>
Message-ID: <bu4cdk$cv09p$1@ID-207230.news.uni-berlin.de>


"Serv? Lau" <serve at detongiser.com> wrote in message
news:100bbb6kj9m03a4 at corp.supernews.com...
> "Paul Boddie" <paul at boddie.net> wrote in message
> news:23891c90.0401140223.344b22af at posting.google.com...
> > Erik Max Francis <max at alcyone.com> wrote in message
> news:<4004EC9E.1E2E2893 at alcyone.com>...
> > >
> > > There are plenty of things you can get out of starting, getting
involved
> > > with, and approaching open source projects.  A legion of personal
> > > servants is not going to be one of them, and only a crass idiot would
> > > think otherwise.
> >
> > As far as I've been able to discover, life is just one long cocktail
> > party in Brandon's honour. So it isn't exactly surprising that
> > everyone appears to him as just another waiter with a tray of drinks.

Is there something fundamentally *wrong* with recognizing how useless people
are to your purposes?

> Well said, that's just how he sounds.
> I think I'm gonna create a new sig
>
> "I won't stop denigrating OS people for being incapable of fulfillng the
> kinds of projects I have in mind
> Brandon J. Van Every"

Except that I didn't say that, so it wouldn't be within your legal rights to
quote me as having said such.  If you want to quote me, you're going to have
to *quote* me, not paraphrase me in your own idiom.

-- 
Cheers,                     www.indiegamedesign.com
Brandon Van Every           Seattle, WA

20% of the world is real.
80% is gobbledygook we make up inside our own heads.



From ashleylloyd at hotmail.com  Fri Jan  9 06:01:12 2004
From: ashleylloyd at hotmail.com (Ashley Lloyd)
Date: Fri, 09 Jan 2004 11:01:12 +0000
Subject: Newbie: Getting Image From Disk into Buffer
Message-ID: <BAY99-F67GToTVeoS8C00032446@hotmail.com>

Thanks very much for your reply.

I ended up getting this working by using:

f=open(fileName','rb',-1)
buf=f.read()

I'd swear I tried this before with no success, but I can't have (or more 
than likely did it in the wrong way, somehow) - so sorry to everyone whose 
time I've wasted by asking such a stupid question!

Anyway, thanks very much once again for your reply.

Cheers

Ashley

>From: woodsplitter at rocketmail.com (David Rushby)
>To: python-list at python.org
>Subject: Re: Newbie: Getting Image From Disk into Buffer
>Date: 8 Jan 2004 13:27:49 -0800
>
>"Ashley Lloyd" <ashleylloyd at hotmail.com> wrote in message 
>news:<mailman.180.1073487526.12720.python-list at python.org>...
> > I have been trying to get an image into an interbase database (see 
>earlier
> > post), and came across a post made on a list some time ago (I ignored it
> > earlier as we use kinterbasDB not gvib, but I thought I'd try using it 
>in
> > kinterbasDB anyway):
> > ...
> > it always seems to place
> > into the database a string of either the name of the image on disk
> > ('c:/image.bmp', say), or text such as the following:
> > <open file 'c:/image.bmp', mode 'rb' at 0x009F06A0>
>
>In the 'c:/image.bmp' case, you're inserting the file's name (string);
>in the "<open file 'c:/image.bmp', mode 'rb' at 0x009F06A0>" case,
>you're inserting an open file object, which is repr()ed into a string
>for storage.  Instead, you need to insert the *contents* of the file
>as a string, e.g., the return value of the file object's read()
>method.
>
> > ... but if someone could tell me how I get the image into blob_data
> > (which I assume is a buffer), I'd be very grateful.
>
>http://sourceforge.net/forum/forum.php?thread_id=889866&forum_id=30917
>--
>http://mail.python.org/mailman/listinfo/python-list

_________________________________________________________________
It's fast, it's easy and it's free. Get MSN Messenger today! 
http://www.msn.co.uk/messenger




From kramb64 at hotmail.com  Wed Jan 21 18:20:23 2004
From: kramb64 at hotmail.com (kramb64 at hotmail.com)
Date: Thu, 22 Jan 2004 00:20:23 +0100
Subject: shelve slow in python 2.3.3 for windows
References: <u1qt00t4nbubknpq2lmeovdk36gu9ekt3r@4ax.com>
	<mailman.614.1074721650.12720.python-list@python.org>
Message-ID: <322u00ppo44l8g003dgtcu8lna432to411@4ax.com>

On Wed, 21 Jan 2004 15:47:20 -0600, Skip Montanaro <skip at pobox.com>
wrote:

>    whichdb.whichdb("a") 
>report under both versions?  My wild-ass guess is that the underlying anydbm
>module finds dumbdbm under 2.3.3 and something more industrial strength like
>bsddb under 2.2.

Skip,
you are right!

Under 2.3.3: 'dbhash'

Under 2.2: 'bsddb185'

Now the question is: is it possible to use bsddb185 with python 2.3.3?

Thanks.
Ciao.
Marco.


From rick_muller at yahoo.com  Sat Jan 17 23:19:07 2004
From: rick_muller at yahoo.com (Rick Muller)
Date: 17 Jan 2004 20:19:07 -0800
Subject: Why gmp is not in the standard library?
References: <4f0a9fdb.0401150211.615a7f45@posting.google.com>
	<mailman.418.1074201211.12720.python-list@python.org>
Message-ID: <5eb8fb88.0401172019.358535c4@posting.google.com>

Tim Churches <tchur at optushome.com.au> wrote in message news:<mailman.418.1074201211.12720.python-list at python.org>...
However, if
> some dead wood is ever removed from the Python standard library, I would
> love to see gmpy take its place. Thanks to the gmpy (and GMP) developer,


Amen to that. GMP is a sweet library, and gmpy makes it so easy to
play around with I can waste all sorts of time when I should be
getting real work done.


From newsgroups at jhrothjr.com  Sat Jan  3 12:45:34 2004
From: newsgroups at jhrothjr.com (John Roth)
Date: Sat, 3 Jan 2004 12:45:34 -0500
Subject: Integer math question
References: <3987e01c.0401030832.114c6f2a@posting.google.com>
Message-ID: <vvdvvb8hkek27d@news.supernews.com>


"Frank" <mersmann at szut.uni-bremen.de> wrote in message
news:3987e01c.0401030832.114c6f2a at posting.google.com...
> Hi,
>
> can anybody help with the following problem?
>
> In C++
>
> i = 5 / 10 and
> i = -5 / 10 both have the same result 0.
>
> In python
>
> i = 5 / 10 gives me 0 as expected, but
> i = -5 / 10 gives -1 as result.
>
> Is this a feature or a bug? I remember Delphi gave me the same result as
> C++.

That's a feature. Integer division is explicitly defined in
Python to do exactly that.

The basic thing to remember is that the *correct*
mathematical result of dividing one integer by
another integer is a rational. Python does not
have a rational data type, so it has to pick one
of the multitude of possible ways of rounding a
non-integral result to an integer.

There is no universally right answer to this process:
the "right" answer to any rounding problem is
what the customer wants it to be.

John Roth

>
> TIA,
> Frank




From bart_nessux at hotmail.com  Tue Jan 13 09:23:59 2004
From: bart_nessux at hotmail.com (Bart Nessux)
Date: Tue, 13 Jan 2004 09:23:59 -0500
Subject: Make a function call itself after set amount of time
Message-ID: <bu0v1v$qio$1@solaris.cc.vt.edu>

How do I make a function call itself every 24 hours. Also, is there a 
way to start the program automatically w/o depending on the OS functions 
like 'Task Scheduler' or 'Start Up Items'... this is on Windows 2k and 
xp. Below is an example of what I'm trying to do.

TIA

def ipconfig_email():
    from email.MIMEText import MIMEText
    import smtplib
    import time
    import os

    u = "user name"		#Change This to user's name.
    f = "my-email-addy"
    t = "my-email-addy"

    fp0 = os.popen("ipconfig /all", "r")
    fp1 = os.popen("psinfo -d -s", "rb")
    msg = MIMEText(fp0.read() + fp1.read())
    fp0.close()
    fp1.close()

    msg["Subject"] = "%s's IPconfig Report" % u
    msg["From"] = f
    msg["To"] = t

    h = "my.smtp.server"
    s = smtplib.SMTP(h)
    s.sendmail(f, t, msg.as_string())
    s.quit()
    time.sleep(86400)	#24 hour sleep
    HOW_DO_I_CALL_THE_FUNCTION_AGAIN?

ipconfig_email()



From maketo at otaku.freeshell.org  Sun Jan 25 22:29:39 2004
From: maketo at otaku.freeshell.org (Ognen Duzlevski)
Date: Mon, 26 Jan 2004 03:29:39 +0000 (UTC)
Subject: ReadDirectoryChangesW (windows)
Message-ID: <bv21j3$ong$1@chessie.cirr.com>

Hi all,

I am new to win32 programming and was wondring if anyone can enlighten me on a question I have:

there is a win32file function I would like to use - ReadDirectoryChangesW() and its parameters are, according to
below:

----
ReadDirectoryChangesW(handle, size, bWatchSubtree, dwNotifyFilter, overlapped)

retrieves information describing the changes occurring within a directory.

Parameters:

handle : int
Handle to the directory to be monitored. This directory must be opened with the FILE_LIST_DIRECTORY access right.

size : int
Size of the buffer to allocate for the results.

bWatchSubtree : int
Specifies whether the ReadDirectoryChangesW function will monitor the directory or the directory tree. If TRUE is 
specified, the function monitors the directory tree rooted at the specified directory. If FALSE is specified, the 
function monitors only the directory specified by the hDirectory parameter.

dwNotifyFilter : int
Specifies filter criteria the function checks to determine if the wait operation has completed. This parameter can be 
one or more of the FILE_NOTIFY_CHANGE_* values.

overlapped=None : PyOVERLAPPED
Must be None
------

I would like to use this function asynchronously to open a directory using the FILE_FLAG_OVERLAPPED flag so that I can 
later on wait for a change to be signalled and so that I can use this in a service waiting with e.g. 
WaitForSingleObject().

I don't have much experience using pywin32 and I am puzzled by the last line "Must be None". Does this mean 
asynchronous access is not supported? Or am I ready to actually RTFM if someone can politely point me to one? :)

Thanks,
Ognen


From jcarlson at uci.edu  Thu Jan 22 11:51:05 2004
From: jcarlson at uci.edu (Josiah Carlson)
Date: Thu, 22 Jan 2004 08:51:05 -0800
Subject: Assignment to slice
References: <mailman.604.1074712550.12720.python-list@python.org>
	<20040121130236.D8E3.JCARLSON@uci.edu>
	<mailman.619.1074727680.12720.python-list@python.org>
	<20040121185145.C648.JCARLSON@uci.edu>
	<rl+DAls/KLZU089yn@the-wire.com>
Message-ID: <20040122084443.0264.JCARLSON@uci.edu>

> >Hell, I think that Perl variables are f-ing weird.  In the dozen
> >languages I've learned over the years, Perl is the only one where you
> >have to say hey, you this variable I'm accessing now, it is a scalar,
> >not a string.  What the hell is that?  On the other hand, Perl users
> >have gotten used to it, and don't think it is strange.
> 
>    This seems to have emerged from a Perl tendency to
> implement values as strings wherever possible.  You're
> saying "Use the stringness of this variable, rather than,
> say, its intness."  Weak typing, but it's what lets Perl
> automatically fill in missing array values with some
> assurance that it won't all go kaboom in the next statement.

Mel,
There are many ways to assure "that it won't go all kaboom in the next
statement".  Perl's choice is just that, a choice.  Every language
designer gets to make more than a few (close to semi-infinite) choices
in how their language is going to work.  The rest of us get on with our
lives and use the language.  Please let us get on with just writing code
in whatever language we feel we need to, and stop talking about the
different individual choices that every language designer made in the
last 10 years.

 - Josiah


From vincent at visualtrans.de  Sun Jan  4 10:06:10 2004
From: vincent at visualtrans.de (vincent wehren)
Date: Sun, 4 Jan 2004 16:06:10 +0100
Subject: importing
References: <231bc96c.0401031249.12cff6d7@posting.google.com>
Message-ID: <bt9a52$nug$1@news4.tilbu1.nb.home.nl>

"Boomer" <boomer4467 at yahoo.com> schrieb im Newsbeitrag
news:231bc96c.0401031249.12cff6d7 at posting.google.com...
| Hi all,
|     I'm new to python which explains my problems with this. I'm trying
| to import a .csv file(from excel) into some fields on my company's
| software system(which interfaces to an sql database. Each row in this
| .csv file needs to be split into smaller strings and each respective
| string applied to it's field in the software then it's saved and the
| next row starts, here's the code I've come up with so far.
|
| f=open ("book1.csv", "r")
| s=f.readline ()
| while s != "":
|   print s
|   l = s.split(s,",",(11))
|   PlayIt.SetFieldContent ("SY012M1", "art-nr", l[0])
|   PlayIt.PlayContent ("{CSB SY012M1|art-nr}{Enter}")
|   PlayIt.SetFieldContent ("SY012ADM1", "001bez",  l[1])
|   PlayIt.SetFieldContent ("SY012ADM1", "005agr",  l[2])
|   PlayIt.SetFieldContent ("SY012ADM1", "006agr",  l[3])
|   PlayIt.SetFieldContent ("SY012ADM1", "009kst",  l[4])
|   PlayIt.SetFieldContent ("SY012EHM1", "005laeh",  l[5])
|   PlayIt.SetFieldContent ("SY012EHM1", "006lauf",   l[6])
|   PlayIt.SetFieldContent ("SY012EHM1", "011vkuf",   l[7])
|   PlayIt.SetFieldContent ("SY012SDM1", "012fest",   l[8])
|   PlayIt.SetFieldContent ("SY012PRM1", "001tpr",   l[9])
|   PlayIt.SetFieldContent ("SY012PRM1", "002wpr",   l[10])
|   PlayIt.SetFieldContent ("SY012PRM1", "003plpr",   l[11])
|   PlayIt.PlayContent ("{CSB SY012M1|art-nr}{F2}")
|   s=f.readline ()
| f.close ()
|
| here's the error
|
| Traceback (innermost last):
|   File "<string>", line 5, in ?
| AttributeError: 'string' object has no attribute 'split'
|
| the furthest I get is when I remove the s.split all together then I
| can actually watch it import the first field correctly and switch
| focus to the second field where it prints a comma and then hangs and
| eventually gives the
| argument 3: expected string list found
| Someone told me I need to import the string module using "import
| string" somewhere in my code, but when I do this I get an error
| stating that no such module exists. I run this as script inside a
| macro from another program and I believe the version of python this
| program uses is 2.2.1.

Hi "Boomer"

if you are using version V3.91 or lower of your companies software, the
embedded Python will still be at 1.52. If it is V4.20 it'll be Python 2.2.2.
Since I know that the Python standard library is not shipped with the
software you are referring to, you need to either install Python (in the
version corresponding to your version) on your local machine, or an
accessible share and set your environment properly.

Looking at your example I am pretty confident that your are using V391 which
embedds 1.52. As a quick fix: check if either "string.pyc" or "string.py"
lives in your w32 directory or - if you are executing via a .pli file - in
the directory "playit.exe" lives in. If that is not the case, get either
module in the correct version and copy it to the directories just described.
This will fix your problem (until you try to import another module
ofcourse).

HTH

Vincent Wehren















|
| Does anyone have any ideas? Any help would be wonderful!!!




From skip at pobox.com  Thu Jan 15 15:14:27 2004
From: skip at pobox.com (Skip Montanaro)
Date: Thu, 15 Jan 2004 14:14:27 -0600
Subject: [OT] AS/400
In-Reply-To: <bu6l68$8uv$1@atlantis.news.tpi.pl>
References: <mailman.352.1074092092.12720.python-list@python.org>
	<bu4a5n$k9$6@atlantis.news.tpi.pl> <4005cd03@news.mt.net.mk>
	<bu6l68$8uv$1@atlantis.news.tpi.pl>
Message-ID: <16390.62627.412838.31268@montanaro.dyndns.org>


    >>> (will not mention that it works on AS/400, the best minicomputer(!)
    >>> ever made).
    >> 
    >> Why is it the best minicomputer ever made?  I really want to know!

    Jarek> Since nobody ever produced any other. Only IBM produced machines
    Jarek> that can be called "midrange" (something between microcomputer
    Jarek> and "real computer", the famous S/390 mainframe). They still use
    Jarek> this terminology.

You seem to be forgetting (at least) DEC's VAX line of computers.  Data
General and PR1ME had computers classed as "mini" computers also.  I'm sure
there were others.

Skip



From kramb64 at hotmail.com  Wed Jan 21 16:11:00 2004
From: kramb64 at hotmail.com (kramb64 at hotmail.com)
Date: Wed, 21 Jan 2004 22:11:00 +0100
Subject: shelve slow in python 2.3.3 for windows
Message-ID: <u1qt00t4nbubknpq2lmeovdk36gu9ekt3r@4ax.com>

I already submitted a bug, but I'm curious to know if anybody ran into
this.
Try this program on Windows with python 2.3.3 and with python 2.2:

import shelve 
a=shelve.open("a", "c") 
for x in xrange(10000): 
	a[str(x)]=x 
	print str(x) + "\r", 
a.close() 

After about 7000/8000 insertions, the program gets so slow...
With python 2.2 it ends in a blink!
Really strange, isn't it?

Ciao.
Marco.


From hasan at slac.stanford.edu  Wed Jan 28 13:03:09 2004
From: hasan at slac.stanford.edu (Adil Hasan)
Date: Wed, 28 Jan 2004 10:03:09 -0800
Subject: Problem connecting to https using ZSI (openssl problem) -
 python2.3
In-Reply-To: <Pine.GSO.4.58.0401271908190.25634@flora01.slac.stanford.edu>
References: <Pine.GSO.4.58.0401271908190.25634@flora01.slac.stanford.edu>
Message-ID: <Pine.GSO.4.58.0401281001480.19505@flora03.slac.stanford.edu>


 Hello,
       As a follow up to this. I noticed that the port that I was
 contacting the server on was not correct. Now, I have moved forward
 to an access denied message (I'll post that error in another news group).

 Hope this is helpful, adil


On Tue, 27 Jan 2004, Adil Hasan wrote:

>
>  Hello,
>        I'm having problems trying to use ZSI to connect to a https url.
>  I give the command and I get prompted for my X509 cert pass-phrase, but
>  the program dies with an openssl error.
>
>  Here's my code:
>
>  from ZSI import *
>  u=''
>  n='https://shahzad.fnal.gov/edg-voms-admin/uscms/services/VOMSAdmin'
>  b = Binding(url=u,ns=n, ssl=1, \
>              host='shahzad.fnal.gov',port=8080, \
>              cert_file='/home/hasan/.globus/usercert.pem', \
>              key_file='/home/hasan/.globus/userkey.pem')
>  b.listCAs()
>
> The traceback I get is:
> Enter PEM pass phrase:
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
>   File "/usr/local/python2.3/lib/python2.3/site-packages/ZSI/client.py",
> line 28, in __call__
>     requesttypecode=TC.Any(self.name, aslist=1))
>   File "/usr/local/python2.3/lib/python2.3/site-packages/ZSI/client.py",
> line 131, in RPC
>     self.Send(url, opname, obj, **kw)
>   File "/usr/local/python2.3/lib/python2.3/site-packages/ZSI/client.py",
> line 184, in Send
>     self.h.connect()
>   File "/usr/local/python2.3/lib/python2.3/httplib.py", line 961, in
> connect
>     ssl = socket.ssl(sock, self.key_file, self.cert_file)
>   File "/usr/local/python2.3/lib/python2.3/socket.py", line 73, in ssl
>     return _realssl(sock, keyfile, certfile)
> socket.sslerror: (1, 'error:140770FC:SSL
> routines:SSL23_GET_SERVER_HELLO:unknown protocol')
>
> Any ideas about this? Does anyone know how to solve this problem? I have
> seen one post here with a similar problem, but haven't seen any
> resolution.
>
> Help!
>
> thanks, adil
>


From webmaster at beyond-thoughts.com  Fri Jan  9 13:41:32 2004
From: webmaster at beyond-thoughts.com (Christoph Becker-Freyseng)
Date: Fri, 09 Jan 2004 19:41:32 +0100
Subject: PRE-PEP: new Path class; sorting and __cmp__
In-Reply-To: <vvivefh35qjv9a@news.supernews.com>
References: <vvivefh35qjv9a@news.supernews.com>
Message-ID: <3FFEF5DC.1080804@beyond-thoughts.com>

As I pointed out path.__cmp__ should not be used for e.g. comparing 
filesizes.

But features like sorting on filesizes are very useful.
I'm not sure if Gerrit Holl already meant this in his conclusion on 
"Comparing files" in the PEP.
I'll outline it a bit ...

I propose a callable singleton class which only instance we assign to 
sort_on (defined in the path-module).
It will have methods like: filesize, extension, filename, etc.
They will all be defined like:
def filesize(self, path1, path2):
	try:
		return path1._cmp_filesize(path2)
	except XXX:	# catch Exceptions that are raised because path1 doesn't 
know how to compare with path2 (for different path-subclasses)
		XXX
	try:
		return (-1) * path2._cmp_filesize(path1)	# is this the best way to do 
this?
	except XXX:
		XXX
	raise YYY # "path1 and path2 can't be compared on filesize; class1 and 
class2 are not compatible"

And
def __call__(self, *args):
	if len(args) == 0:
		return self.filesize	# example!
	elif len(args) == 1:	# allow comparing uncommon things for subclasses 
of path e.g. ServerName/IPs for FTPPath ...
		def cmp_x(path1, path2, what=str(args[0])):
			# like filesize but
			pathCmpFunc= getattr(path1, '_cmp_'+what)
			return pathCmpFunc(path2)
			# Catch exceptions ...
		return cmp_x
	elif len(args) == 2:	# default comparison
		return	self.filesize(path1, path2)	# example!
	else:
		raise "Won't work ...  FIXME"




Then we can have things like:

l= [path1, path2, path3]
l.sort(path.sort_on.filesize)
l.sort(path.sort_on.extension)

....


I like this :-)

What do You think?



Christoph Becker-Freyseng






From fuf at mageo.cz  Wed Jan 28 10:41:19 2004
From: fuf at mageo.cz (Michal Vitecek)
Date: Wed, 28 Jan 2004 16:41:19 +0100
Subject: isinstance() bug
In-Reply-To: <16407.54576.283608.505067@montanaro.dyndns.org>
References: <20040128132225.GA10842@foof.i3.cz>
	<16407.54576.283608.505067@montanaro.dyndns.org>
Message-ID: <20040128154119.GA11485@foof.i3.cz>

Skip Montanaro wrote:
>You imported the module twice (look at sys.modules) so you have two
>different A classes.  I believe isinstance() uses the __class__ attribute
>and the class's __bases__ attribute to work its way up the class chain
>looking for a match.  Even though they are defined identically, you have two
>different A classes.  An instance of one can't also be an instance of the
>other.

 i think that if absolute path was somehow put into the classes internal
 information this inconsistency would be put away.
 
 it's my belief that if i'm instantiating a class from the same location
 no matter how i imported its definition, its instances are always of
 the same class.

 and as to the sys.modules thing: this could be considered as just two
 references to the same module (again its absolute path would be taken
 into account), not two different modules.

 does it make sense?

-- 
		fuf		(fuf at mageo.cz)



From arjen.dijkstraNoSpam at hccnet.nl  Wed Jan 14 04:07:50 2004
From: arjen.dijkstraNoSpam at hccnet.nl (duikboot)
Date: Wed, 14 Jan 2004 10:07:50 +0100
Subject: Oracle to Mysql (dates) Help please
References: <btrj8h$oiq$1@news3.tilbu1.nb.home.nl>
	<a7i8d1-044.ln1@beastie.ix.netcom.com>
	<t7m8d1-q54.ln1@beastie.ix.netcom.com>
	<4003b6e7$0$142$e4fe514c@dreader4.news.xs4all.nl>
	<p7mdd1-g74.ln1@beastie.ix.netcom.com>
Message-ID: <40051543$0$137$e4fe514c@dreader11.news.xs4all.nl>

Sorry, I can't find it. Can you quote it for me, please?
"Dennis Lee Bieber" <wlfraed at ix.netcom.com> schreef in bericht
news:p7mdd1-g74.ln1 at beastie.ix.netcom.com...
> duikboot fed this fish to the penguins on Tuesday 13 January 2004 01:13
> am:
>
> >
> >
> > Could you please explain that?
>
>         See the reply
<mailman.282.1073834719.12720.python-list at python.org>
> (Pieter Claerhout) -- though according to my documents, the method is
> executemany(), not execute_many().
>
>
> --
>  > ============================================================== <
>  >   wlfraed at ix.netcom.com  | Wulfraed  Dennis Lee Bieber  KD6MOG <
>  >      wulfraed at dm.net     |       Bestiaria Support Staff       <
>  > ============================================================== <
>  >        Bestiaria Home Page: http://www.beastie.dm.net/         <
>  >            Home Page: http://www.dm.net/~wulfraed/             <
>




From exarkun at intarweb.us  Fri Jan 16 10:36:06 2004
From: exarkun at intarweb.us (Jp Calderone)
Date: Fri, 16 Jan 2004 10:36:06 -0500
Subject: Bug or feature?
In-Reply-To: <1ljkd1-053.ln1@beastie.ix.netcom.com>
References: <bu58st$1ha3$1@news.rtcomm.ru>
	<3dtid1-594.ln1@beastie.ix.netcom.com>
	<ZvidncM7G8svuZrdRVn-jA@comcast.com>
	<1ljkd1-053.ln1@beastie.ix.netcom.com>
Message-ID: <20040116153606.GA25928@intarweb.us>

On Fri, Jan 16, 2004 at 08:31:32AM +0000, Dennis Lee Bieber wrote:
> Terry Reedy fed this fish to the penguins on Thursday 15 January 2004 
> 15:39 pm:
> 
> >
> > and returning a value.  I see a little better Guido's reason for having
> > list modification methods return None.  While chaining is not too
> > problematical, object returns would allow list expressions mixing
> > implicit and overt effects with possible puzzles similar to the one
> > presented in this thread.
> >
>         Now that you mention it... Yeah... Can you imagine trying to figure 
> out what something like
> 
>         alist = ['j', 'i', 'h', 'g', 'f', 'e', 'd', 'c', 'b', 'a']
>         res = alist[:5] + alist.sort() + alist[5:]
> 
> was supposed to return?
>  
>         jihgfabcdefghijedcba
> or
>         jihgfabcdefghijabcde
> or
>         abcdeabcdefghijabcde
> or
>         abcdeabcdefghijfghij
> 
>         The only "known" is that the middle is supposed to be abcdefghij, but 
> the left and right ends depend solely on order of evaluation...
> 

  http://python.org/doc/current/ref/evalorder.html

  Doesn't seem to be a problem, after all.

  Jp



From guido at python.org  Mon Jan 12 13:26:23 2004
From: guido at python.org (Guido van Rossum)
Date: Mon, 12 Jan 2004 10:26:23 -0800
Subject: PyCon Reminder: Proposal deadline 1/15 (LAST WARNING)
Message-ID: <200401121826.i0CIQNI03412@c-24-5-183-134.client.comcast.net>

This is the *last* reminder that the deadline for sending proposals
for presentations at PyCon DC 2004 is January 15, 2004.  That's
upcoming Thursday!

I'm also reminding everybody, speakers and non-speakers, of the
upcoming deadline for Early Bird Registration: January 31.  Until
then, the registration fee is $175 (student rate $125); after that
date, the registration price goes up to $250 (student rate $150).
Don't forget to register!  (Sorry, there's no speakers discount.)

If you're coming to the conference, consider coming a few days early
and participate in a coding sprint.  Sprints are free (courtesy of the
PSF!), and are held from Saturday March 20 through Tuesday March 23
(i.e. the four days leading up to the conference).  For more info on
sprints, see http://pycon.org/dc2004 .

Now back to proposal submissions:

We are interested in any and all submissions about uses of Python and
the development of the language.  Since there is expected to be a
strong educational community presence for the next PyCon, teaching
materials of various kinds are also encouraged.

You can submit your proposal at:

    http://submit.pycon.org/

For more information about proposals, see:

    http://www.pycon.org/dc2004/cfp/

If you have further questions about the submission web interface or
the format of submissions, please write to:

    pycon-organizers at python.org

We would like to publish all accepted papers on the web.  If your
paper is accepted and you prepare an electronic presentation (in PDF,
PythonPoint or PowerPoint) we will also happily publish that on the
web site once PyCon is over.

If you don't want to make a formal presentation, there will be a
significant amount of Open Space to allow for informal and
spur-of-the-moment presentations for which no formal submission is
required.  There will also be several Lightning Talk sessions (five
minutes or less).

About PyCon:

PyCon is a community-oriented conference targeting developers (both
those using Python and those working on the Python project).  It gives
you opportunities to learn about significant advances in the Python
development community, to participate in a programming sprint with
some of the leading minds in the Open Source community, and to meet
fellow developers from around the world.  The organizers work to make
the conference affordable and accessible to all.

PyCon DC 2004 will be held March 24-26, 2004 in Washington, D.C.  The
keynote speaker is Mitch Kapor of the Open Source Applications
Foundation (http://www.osafoundation.org/).  There will be a four-day
development sprint before the conference.

We're looking for volunteers to help run PyCon.  If you're interested,
subscribe to http://mail.python.org/mailman/listinfo/pycon-organizers

Don't miss any PyCon announcements!  Subscribe to
http://mail.python.org/mailman/listinfo/pycon-announce

You can discuss PyCon with other interested people by subscribing to
http://mail.python.org/mailman/listinfo/pycon-interest

The central resource for PyCon DC 2004 is http://www.pycon.org/

Pictures from last year's PyCon:
http://www.python.org/cgi-bin/moinmoin/PyConPhotos

I'm looking forward to seeing you all in DC in March!!!

--Guido van Rossum (home page: http://www.python.org/~guido/)

_______________________________________________
Pycon-organizers mailing list
Pycon-organizers at python.org
http://mail.python.org/mailman/listinfo/pycon-organizers



From cjw at sympatico.ca  Thu Jan  1 15:47:55 2004
From: cjw at sympatico.ca (Colin J. Williams)
Date: Thu, 01 Jan 2004 15:47:55 -0500
Subject: newbie question
In-Reply-To: <4ebabbc5.0312311614.2446e31c@posting.google.com>
References: <4ebabbc5.0312311614.2446e31c@posting.google.com>
Message-ID: <KH%Ib.11847$Vl6.2633801@news20.bellglobal.com>

You might look at your indentation.

The def __init__ line should have the same indentation as the preceding 
doc string.

Colin W.

Julia Osip wrote:

> Hi, just started fiddling around with python, having some difficulty
> getting the following small play program to execute.  Furious
> searching in the docs, manual, newsgroup did not avail me, does anyone
> have any ideas what might be the problem?  Some sort of whitespace
> issue (im still unsure of whitespace rules)?  I'm running Mac OS
> 10.2.8, with MacPython 2.3.
> 
> Thanks for any help you can give...
> 
> the code
> ...snip...
> #!/usr/bin/env python
> 
> class World:
> 
>     """contains everything"""
> 
> 	def __init__(self):
> 		self.name = "world"
> 		self.locations = []                     # list of all locations in
> the world
> 		self.dist_locations = []		# the amount of travel time required
> between locations
> 		self.actors = []				# list of all actors in the world
> 		self.organizations = []		# list of all organizations in the world
> 		self.time = 0				# current moment in the world
> 		return
> 
> ...snip...
> 
> the error
> ...snip...
>   File "<string>", line 7
>     def __init__(self):
>     ^
> SyntaxError: invalid syntax
> ...snip...



From gerrit at nl.linux.org  Tue Jan  6 13:58:31 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Tue, 6 Jan 2004 19:58:31 +0100
Subject: PRE-PEP: new Path class
In-Reply-To: <20040105214508.GA29923@nl.linux.org>
References: <vvivefh35qjv9a@news.supernews.com>
	<20040105214508.GA29923@nl.linux.org>
Message-ID: <20040106185831.GA4581@nl.linux.org>

Hi,

I have updated the PEP, partly based on comments by other, partly on my
own thoughts. Tinyurl seems down, the latest version is available at:

http://people.nl.linux.org/~gerrit/creaties/path/pep-xxxx.html

yours,
Gerrit.

-- 
263. If he kill the cattle or sheep that were given to him, he shall
compensate the owner with cattle for cattle and sheep for sheep.
          -- 1780 BC, Hammurabi, Code of Law
-- 
Asperger's Syndrome - a personal approach:
	http://people.nl.linux.org/~gerrit/english/



From lbates at swamisoft.com  Mon Jan 12 18:29:43 2004
From: lbates at swamisoft.com (Larry Bates)
Date: Mon, 12 Jan 2004 17:29:43 -0600
Subject: Calling dlls with Calldll/WinDll or Ctypes or...
References: <9b849915.0312172302.7999d44a@posting.google.com>
Message-ID: <Wqydnamd67ZGsJ7dRVn-tw@comcast.com>

Todd,

I write this and have used it with many different .DLLs
over the last 18 months.  Good luck.

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/146847

The trick it getting the arguments into/from the correct
format for the .DLL.  I've made extensive use of struct
to accomplish that.  If you want to give it a try, I'd
be happy to assist you as much as I can.

Larry


"Todd Gardner" <piir at earthlink.net> wrote in message
news:9b849915.0312172302.7999d44a at posting.google.com...
> Hello all,
>
> Pardon my ignorance here.  I would like to talk to someone that has
> had success in calling ddls in Windows NT/2000/XP.
>
> I am wondering where to dload any of these packages?  Google searches
> keep turning up articles similar to this.
>
> Any pointers would be greatly appreciated!
>
> Todd




From max at alcyone.com  Fri Jan 16 15:13:12 2004
From: max at alcyone.com (Erik Max Francis)
Date: Fri, 16 Jan 2004 12:13:12 -0800
Subject: Very strange unicode behaviour
References: <uisjbrhre.fsf@inout.no> <uektzrgor.fsf@inout.no>
Message-ID: <400845D8.C91E0AEE@alcyone.com>

Syver Enstad wrote:

> I have seem to isolate the behaviour:
> 
> >>> chr(127).find(u'')
> 0
> >>>
> >>> chr(128).find(u'')
> -1
> >>>
> UnicodeError: ASCII decoding error: ordinal not in range(128)
> >>>
> 
> Observe that the exception is first thrown on after execing a blank
> line, after calling find on a non ASCII string.
> 
> I'll test this on 2.3 when I get home from work.

I can indeed reproduce this bizarre behavior on 2.2.3.  The problem does
not occur in 2.3.3:

max at oxygen:~% python
Python 2.3.3 (#1, Dec 22 2003, 23:44:26) 
[GCC 3.2.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> chr(127).find(u'')
0
>>> chr(128).find(u'')
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
UnicodeDecodeError: 'ascii' codec can't decode byte 0x80 in position 0:
ordinal not in range(128)
>>> 
max at oxygen:~% python2.2
Python 2.2.3 (#1, Jan  8 2004, 22:40:34) 
[GCC 3.2.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> chr(127).find(u'')
0
>>> chr(128).find(u'')
-1
>>> 
UnicodeError: ASCII decoding error: ordinal not in range(128)


-- 
 __ Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
/  \ San Jose, CA, USA && 37 20 N 121 53 W && &tSftDotIotE
\__/ The doors of Heaven and Hell are adjacent and identical.
    -- Nikos Kazantzakis


From franco.tomaselli at st.com  Wed Jan 28 03:48:57 2004
From: franco.tomaselli at st.com (franco.tomaselli at st.com)
Date: Wed, 28 Jan 2004 09:48:57 +0100
Subject: HI
Message-ID: <200401280849.JAA05873@agx002.agr.st.com>

------------------  Virus Warning Message (on zeta)

Found virus WORM_MIMAIL.R in file message.pif (in message.zip)
The uncleanable file is deleted.

---------------------------------------------------------
-------------- next part --------------
Mail transaction failed. Partial message is available.

-------------- next part --------------

------------------  Virus Warning Message (on zeta)

message.zip is removed from here because it contains a virus.

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

From jepler at unpythonic.net  Thu Jan  8 22:57:47 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Thu, 8 Jan 2004 21:57:47 -0600
Subject: convert a list to a string
In-Reply-To: <3FFE2084.7010700@hotmail.com>
References: <3FFE1E29.20801@hotmail.com> <7xwu81dcr7.fsf@ruckus.brouhaha.com>
	<3FFE2084.7010700@hotmail.com>
Message-ID: <20040109035747.GF24734@unpythonic.net>

On Thu, Jan 08, 2004 at 10:31:16PM -0500, Bart Nessux wrote:
> How does randint and sample differ? I was under the impression that 
> sample was more random.

sample is useful when you want to choose several items from the
population.  The degenerate case
    random.sample(range(100), 1)
is equivalent to
    [random.choice(range(100))]
is equivalent to
    [random.randrange(100)]

here's where sample is useful:  Pick a TLA, but don't repeat any letters:
    >>> "".join(random.sample(string.uppercase, 3))
    'CLA'
You can't sample more than your whole population:
    >>> "".join(random.sample(string.uppercase, 28))
    ValueError: sample larger than population
And here's another way to take a random permutation of the alphabet:
    >>> "".join(random.sample(string.uppercase, 26))
    'STFVCQHDLOUNERPYIMABGJXKZW'
No letters are repeated, unlike with random.choice:
    >>> "".join([random.choice(string.uppercase) for i in
    >>> range(26)])
    'ZMXYCNLDCQAIYTAVPPTSGABNVU'
(the odds of *not* having a duplicate letter here are quite small,
though I don't know offhand just how small--maybe 26!/(26**25)?)

Jeff



From aathan-python-5923 at cloakmail.com  Mon Jan  5 20:27:13 2004
From: aathan-python-5923 at cloakmail.com (Andrew Athan)
Date: Mon, 5 Jan 2004 20:27:13 -0500
Subject: Repost: Can't sys.exit() from SIGTERM handler?
In-Reply-To: <NFBBICMEBHKIKEFBPLMCKEIAGPAA.aathan-python-5923@cloakmail.com>
Message-ID: <NFBBICMEBHKIKEFBPLMCGEIBGPAA.aathan-python-5923@cloakmail.com>



I have a python program (snippet below) which does not want to seem to die
when I issue a sys.exit() inside the SIGTERM handler.  The output below is
generated as the result of sending several SIGTERM signals to the process,
as a result of seeing that it had not died.

I don't think this is relevant, but the application has fork()ed a child
process (cdparanoia).  The only thing I can think of is that somehow, there
is an exception occuring inside sys.exit(), otherwise why am I not seeing
the "Did not sys.exit()!?" output?  Could it be that exit() is returning but
that the output fd's are already closed?

Verrry strange...and therefore I'm sure I'm making a brain dead mistake.

Thanks in advance,
A.

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

****SIGTERM*****


****SIGTERM*****

..
****SIGCHILD*****


Ripper output status code: (4314, 15)
4320 /root/postprocess /var/music/ripper/8707620b

****SIGCHILD*****

Error JOB_NODISC in job <__main__.JobHandler instance at 0x8204b24>
4321 /bin/setserial /dev/ttyS0 spd_normal

****SIGCHILD*****



Killing child processes...

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

def sigterm(a,b):
    print '\n****SIGTERM*****\n'
    sys.exit()
    print '\nDid not sys.exit()??!!\n'
    killChildren()
    os._exit(1)
    print '\nDid not os._exit()??!!\n'

def killChildren():
    global childPIDs
    print '\n\nKilling child processes...'
    for pid in childPIDs:
        try:
            print 'Terminating %d'%pid
            os.kill(pid,signal.SIGTERM)
            os.waitpid(pid,0)
        except:
            pass

def child_exit(a,b):
    #childpid, status = os.wait()
    print '\n****SIGCHILD*****\n'
    pass


--
http://mail.python.org/mailman/listinfo/python-list




From gerrit at nl.linux.org  Wed Jan 28 15:10:30 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Wed, 28 Jan 2004 21:10:30 +0100
Subject: FRE: PEP 326 is D-E-A-D (was Re: How does compare work?)
In-Reply-To: <A128D751272CD411BC9200508BC2194D03383549@escpl.tcp.com.ar>
References: <A128D751272CD411BC9200508BC2194D03383549@escpl.tcp.com.ar>
Message-ID: <20040128201030.GA6588@nl.linux.org>

Batista, Facundo wrote:
> Aahz wrote:
> #- >Even then, what about PEP 326, which presumes to define highest and
> #- >lowest objects that can be compared with anything?
> #- 
> #- What about it?  ;-)
> #- 
> #- (Guido just posted a Pronouncement rejecting it.)
> 
> Can't find it at http://www.python.org/doc/essays/pepparade.html
> 
> I'm looking in the wrong place?

Look in the Python-Dev Archives:

Guido said:

PEP 326 is REJECTED, because:

- The usefulness of the feature is marginal;
- it is easily implemented when you really need it; and
- we can't agree on a good way to spell it.

http://mail.python.org/pipermail/python-dev/2004-January/042306.html

Gerrit.

-- 
138. If a man wishes to separate from his wife who has borne him no
children, he shall give her the amount of her purchase money and the dowry
which she brought from her father's house, and let her go.
          -- 1780 BC, Hammurabi, Code of Law
-- 
PrePEP: Builtin path type
    http://people.nl.linux.org/~gerrit/creaties/path/pep-xxxx.html
Asperger's Syndrome - a personal approach:
	http://people.nl.linux.org/~gerrit/english/



From somebody at nowhere.com  Wed Jan 28 15:37:51 2004
From: somebody at nowhere.com (Sean Richards)
Date: Thu, 29 Jan 2004 09:37:51 +1300
Subject: How to detect that a key is being pressed, not HAS been pressed
 earlier!??
References: <6ed33425.0401281103.61987e72@posting.google.com>
Message-ID: <87vfmvu7vk.fsf@hugin.valhalla.net>

runed at stud.cs.uit.no (Rune) writes:

> Hey
>
> I'm trying to build a gui application and need to know if the user is
> actually holding down the shift or ctrl key. That is, if the user
> currently is holding down the shift key. In pseudo code this will boil
> down to something like this:
>
> def test:
>   if user presses shift:
>     return SHIFT_IS_PRESSED
>   elif user presses ctrl:
>     return CTRL_IS_PRESSED
>   else
>     return false
>
> It's important to notice here that I'm not interested if the user has
> already pressed shift or ctrl. I'm only interested in knowing if he is
> currently holding down one of these keys. (I have looked into msvcrt
> and the like but have found no answer..) The function should also work
> in both windows and Linux.
>
> Any help is appriciated :)

In wxPython you could do it like this ...

1. Bind the key press events to the two functions

EVT_KEY_DOWN(self, self.OnKeyDown)
EVT_KEY_UP(self, self.OnKeyUp)

2. Set or unset a flag on keydown and keyup

def OnKeyDown(self, event):
    if (event.GetKeyCode() == WXK_SHIFT):
        self.Shift = True
    elif (event.GetKeyCode() == WXK_CONTROL):
        self.Control = True

def OnKeyUp(self, event):
    if (event.GetKeyCode() == WXK_SHIFT):
        self.Shift = False
    elif (event.GetKeyCode() == WXK_CONTROL):
        self.Control = False

Vennlig hilsen,  Sean


-- 
"Hver sin smak", sa vintapperen, han drakk mens de andre sloss.


From tlo2075 at yahoo.fr  Tue Jan  6 17:12:42 2004
From: tlo2075 at yahoo.fr (Tlo)
Date: 6 Jan 2004 14:12:42 -0800
Subject: multiplayer online quizz game - can python help me?
Message-ID: <929eabc7.0401061412.44d51645@posting.google.com>

hello,

i would like to do the following, and as i had never used python in a
network framework i would like to have opinions on this :

i would like to provide some kind of network quizz game, each player
logged in and can then join 'playing rooms', in each rooms they had to
answers many quizz-like questions, after a game finished each players
involved in it are ranked from their corrects answers and the time
they spent to answer. results are saved in a shared database.
graphical interface can be very simple.

can python help me? do you know of similar tools/application i could
use as starting point?

(from a first idea i was thinking of something much more like java but
maybe python can do? i discarded php because i suppose it's more on
the client side)

thanks


From js.bach at web.de  Wed Jan 14 03:27:55 2004
From: js.bach at web.de (tm)
Date: Wed, 14 Jan 2004 09:27:55 +0100
Subject: Parsing c-code
Message-ID: <bu2uoj$8pc$1@piggy.rz.tu-ilmenau.de>

Hello,

are there recommended modules for parsing c-code.
I want to read in c-structs and display it in a tree graphic.

--
Torsten




From try_vanevery_at_mycompanyname at yahoo.com  Tue Jan 13 17:29:09 2004
From: try_vanevery_at_mycompanyname at yahoo.com (Brandon J. Van Every)
Date: Tue, 13 Jan 2004 14:29:09 -0800
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
	<K_YMb.10994$9k7.204413@news.xtra.co.nz>
Message-ID: <bu1qq3$cu440$1@ID-207230.news.uni-berlin.de>


"Peter Ashford" <me at here.there.com> wrote in message
news:K_YMb.10994$9k7.204413 at news.xtra.co.nz...
> Brandon, don't be such an arsehole.  OS developers do things their own
> way and offer their labour for free.  If you don't like it noone will
> care - but don't denegrate people just because they don't do things your
> way.

I'll denigrate them all I want.  With rare exceptions, they aren't a value
add to what I want to get done.  There's this huge cultural divide between
hobbyists and commercialists.

-- 
Cheers,                         www.indiegamedesign.com
Brandon Van Every               Seattle, WA

"We live in a world of very bright people building
crappy software with total shit for tools and process."
                                - Ed Mckenzie



From caseyd1 at stanford.edu  Sun Jan 18 00:26:02 2004
From: caseyd1 at stanford.edu (Casey)
Date: Sat, 17 Jan 2004 21:26:02 -0800
Subject: Webbrowser and Mozilla control on linux
In-Reply-To: <1d17eeb7.0401171633.170e313a@posting.google.com>
References: <1d17eeb7.0401171633.170e313a@posting.google.com>
Message-ID: <bud5m0$nf5$1@news.Stanford.EDU>

I'm not sure about the current state, but you will
want to google around with 
 xul python mozilla
and you will find another dimension of wonder.

I don't know really how much is working, however.

Jay Davis wrote:
> I can launch a browser on linux with the webbrowser module
> and the .open() method.  However, I want to be able also to
> control the browser, specifically, I'd like to be able to 
> go to a URL and invoke the automatic form filler and post
> the form, all from within a python script.
> 
> I have google'd around and I see hints that there are remote
> controller objects for some browsers, but so far I haven't
> found any examples of code that controls the browser; most
> examples just open the browser, which I could just as well
> do from os.system(). 
> 
> If anyone can share some samples, or point me to a good
> reference with browser control details, I'd much appreciate
> it.  Thanks!
> 
> J.D.



From jjl at pobox.com  Sat Jan 31 15:27:41 2004
From: jjl at pobox.com (John J. Lee)
Date: 31 Jan 2004 20:27:41 +0000
Subject: Simple web proxy - help needed
References: <c335e460.0401310918.49361638@posting.google.com>
Message-ID: <87ad43kgn6.fsf@pobox.com>

forshtat at hotmail.com (Ziv Forshtat) writes:
[...]
> Problem is - I don't have to much background in writing proxies, nor
> in writing plugins.
> Any help and suggestions would be welcome. 

Back again... just remembered I posted a tiny MSIE plugin skeleton to
the ctypes list a while back.  That might actually be very close to
what you need already.  Use the latest version of ctypes.

I originally meant not to post it actually, because of the obvious
applications in malware, then forgot about my decision and posted it
anyway.  Oh well, the black hats have plenty of evil code already, I'm
sure.


John


From grobinson at transpose.com  Thu Jan 22 11:25:23 2004
From: grobinson at transpose.com (Gary Robinson)
Date: Thu, 22 Jan 2004 11:25:23 -0500
Subject: I support PEP 326
Message-ID: <BC3563A3.3C38C%grobinson@transpose.com>

I've recently had a couple of cases of needing exactly what it proposes, and
having to kluge around the fact that it's not there. It's a great idea.

If there anywhere else I should be expressing my opinion on this, let me
know.

--Gary

-- 
Putting http://wecanstopspam.org in your email helps it pass through
overzealous spam filters.

Gary Robinson
CEO
Transpose, LLC
grobinson at transpose.com
207-942-3463
Company: http://www.transpose.com
Blog:    http://www.garyrobinson.net





From jepler at unpythonic.net  Sun Jan 18 13:31:17 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Sun, 18 Jan 2004 12:31:17 -0600
Subject: newbie question about compression and ascii
In-Reply-To: <buearm$75n$1@sea.gmane.org>
References: <buearm$75n$1@sea.gmane.org>
Message-ID: <20040118183117.GC24401@unpythonic.net>

Let's get down to what the problem is:
>>> f = zipfile.ZipFile("/tmp/blah.zip", "w")
>>> f.write(u'\xe0')
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "/usr/lib/python2.2/zipfile.py", line 374, in write
    st = os.stat(filename)
UnicodeError: ASCII encoding error: ordinal not in range(128)

Your filenames are Unicode strings, and must contain some characters
that aren't ASCII.  I don't know if ZipFile (or the zip "standard")
defines an encoding for filenames, but it appears not:
	http://www.info-zip.org/pub/infozip/FAQ.html#limits

This might be relevant:
	http://dbforums.com/arch/97/2003/5/773834

Jeff



From maketo at gronland.freeshell.org  Fri Jan  9 10:21:29 2004
From: maketo at gronland.freeshell.org (Ognen Duzlevski)
Date: Fri, 9 Jan 2004 15:21:29 +0000 (UTC)
Subject: how to speedup this code?
Message-ID: <btmgtp$grr$1@chessie.cirr.com>

Hi all,

I have rewritten a C program to solve a bioinformatics problem. Portion where most of the time is spent is:

def DynAlign(scoremat,insertmat,delmat,tseq,qseq,tlen,qlen):
    global ONEINDELPENALTY,OPENGAPPENALTY

    for ndx1 in range(1,tlen+1):
        for ndx2 in range(1,qlen+1):
            delmat[ndx1][ndx2] = Min(delmat[ndx1-1][ndx2]+ONEINDELPENALTY, \
                             Min(scoremat[ndx1-1][ndx2]+OPENGAPPENALTY+ONEINDELPENALTY, \
                             insertmat[ndx1-1][ndx2]+OPENGAPPENALTY+ONEINDELPENALTY))
            insertmat[ndx1][ndx2] = Min(insertmat[ndx1][ndx2-1]+ONEINDELPENALTY, \
                            Min(scoremat[ndx1][ndx2-1]+OPENGAPPENALTY+ONEINDELPENALTY, \
                            delmat[ndx1][ndx2-1]+OPENGAPPENALTY+ONEINDELPENALTY))
            scoremat[ndx1][ndx2] = Min(scoremat[ndx1-1][ndx2-1], \
                            Min(delmat[ndx1-1][ndx2-1], insertmat[ndx1-1][ndx2-1])) + \
                            GetFitnessScore(tseq,ndx1-1,qseq,ndx2-1)

def Min(a,b):
	if a< b:
		return a
	else:
		return b

In C this is not a big deal, delmat, scoremat and insertmat are int matrices dynamically allocated and the 
loop-inside-a-loop is pretty fast. However, on python (2.3) it is very slow. So for comparison, my C version takes 8 
seconds to execute and the python version takes around 730 seconds. I have narrowed down through visual observation 
(print before and print after entry into the above nested loop) that most of the time is spent in there. I have also 
tried the Numeric package with their arrays. It speeded things up somewhat but not considerably.

Any suggestions?

Thank you,
Ognen


From newsgroups at jhrothjr.com  Sun Jan  4 07:07:22 2004
From: newsgroups at jhrothjr.com (John Roth)
Date: Sun, 4 Jan 2004 07:07:22 -0500
Subject: Creating a capabilities-based restricted execution system
References: <LmmdnUn4seDeGWuiXTWc-w@speakeasy.net>
	<vveg0bb6is2f60@news.supernews.com> <bt7lbp$ovg$1@panix2.panix.com>
	<vveohcpod4oje0@news.supernews.com> <bt82d7$ort$1@panix3.panix.com>
Message-ID: <vvg0h93ue63c0b@news.supernews.com>


"Aahz" <aahz at pythoncraft.com> wrote in message
news:bt82d7$ort$1 at panix3.panix.com...
> In article <vveohcpod4oje0 at news.supernews.com>,
> John Roth <newsgroups at jhrothjr.com> wrote:
> >"Aahz" <aahz at pythoncraft.com> wrote in message
> >news:bt7lbp$ovg$1 at panix2.panix.com...
> >> In article <vveg0bb6is2f60 at news.supernews.com>,
> >> John Roth <newsgroups at jhrothjr.com> wrote:
> >>>
> >>>Restricted Python was withdrawn because of a number of holes, of which
> >>>new style classes were the last straw.
> >>
> >> RestrictedPython was *not* withdrawn; rexec was withdrawn.  This is a
> >> difficult enough issue to discuss without confusing different modules.
See
> >>
http://dev.zope.org/Wikis/DevSite/Projects/SupportPython21/RestrictedPython
> >
> >I'm not sure what you're trying to say. The Zope page you reference
> >says that they were (prior to 2.1) doing things like modifying generated
> >byte code and reworking the AST. That's fun stuff I'm sure, but it
> >doesn't have anything to do with "Restricted Execution" as defined in the
> >Python Library Reference, Chapter 17, which covers Restricted Execution,
> >RExec and Bastion (which was also withdrawn.)
> >
> >If I confused you with a subtle nomenclature difference, sorry. I don't
> >care what Zope is doing or not doing, except for the fact that it seems
> >to come up in this discussion. I'm only concerned with what Python is
> >(or is not) doing. The approach in the Wiki page you pointed to does,
> >however, seem to be a substantially more bullet-proof approach than
> >Python's Restricted Execution.
>
> Well, I don't care what you do or don't care about, but I do care that
> if you're going to post in a thread that you actually read what you're
> responding to and that you post accurate information.  If you go back to
> the post that started this thread, it's quite clear that the reference
> was specifically to Zope's RestrictedPython.

I beg to differ. That's what the OP said he started with, not what he's
mostly interested in nor where he wants to end up. I'm including
the first paragraph below:

[extract from message at head of thread]
I've been playing around with Zope's RestrictedPython, and I think I'm
on the way to making the modifications necessary to create a
capabilities-based restricted execution system. The idea is to strip out
any part of RestrictedPython that's not necessary for doing capabilities
and do all security using just capabilities.
[end extract]

To me, at least, it's clear that while he's *started* with a consideration
of Zope's RestrictedPython, he's talking about what would be needed
in regular Python. If he was focusing on Zope, this is the wrong forum
for the thread.

My fast scan of Zope yesterday showed that it was quite impressive,
but some of the things they did seem to be quite specific to the Zope
environment, and don't seem (at least to me) to be all that applicable
to a general solution to having some form of restricted execution.

Much of this thread has focused on "capabilities" and the use of
proxies to implement capabilities. AFIAC, that's not only putting
attention on mechanism before policy, but it's putting attention on
mechanism in the wrong place.

What I *haven't* seen in this thread is very much consideration of
what people want from a security implementation. I've seen that in
some other threads, which included some ways of taming exec and
eval when all you want is a data structure that contains nothing but
known kinds of objects. You don't, however, need exec and eval
for that if you're willing to use the compiler tools (and, I presume,
take a substantial performance hit.)

One problem I've been playing around with is: how would you
implement something functionally equivalent to the Unix/Linux
chroot() facility? The boundaries are that it should not require
coding changes to the application that is being restricted, and it
should allow any and all Python extension (not C language
extension) to operate as coded (at least as long as they don't
try to escape the jail!) Oh, yes. It has to work on Windows,
so it's not a legitimate response to say: "use chroot()."

John Roth

> -- 
> Aahz (aahz at pythoncraft.com)           <*>
http://www.pythoncraft.com/
>
> Weinberg's Second Law: If builders built buildings the way programmers
wrote
> programs, then the first woodpecker that came along would destroy
civilization.

Have to be a pretty non-aggressive woodpecker, if it allowed something
that extensive and complicated to happen before attacking it.





From irmen at -NOSPAM-REMOVETHIS-xs4all.nl  Fri Jan  2 16:11:11 2004
From: irmen at -NOSPAM-REMOVETHIS-xs4all.nl (Irmen de Jong)
Date: Fri, 02 Jan 2004 22:11:11 +0100
Subject: ANN: Snakelets 1.20 (simple-to-use web app server with dynamic
	pages)
Message-ID: <3ff5dee8$0$318$e4fe514c@news.xs4all.nl>

Happy new year everyone!

I'm happy to say that Snakelets 1.20 is available.
(I skipped a bunch of release numbers because of a few large changes)

Snakelets is a Python web application server, mainly for educational
purposes (but it works fine, mind you). This project provides a threaded web
server, Ypages (HTML+Python language, similar to Java's JSPs) and Snakelets:
code-centric page request handlers (similar to Java's Servlets).
It is possible to run Snakelets off a CD (read-only mode).

Snakelet's focus is on understanding the way dynamic web sites are created
(the code is very compact and easy to understand), and make this process as
easy as possible, while still providing a rich and powerful server
environment.

It's released under the open-source MIT Software license.
You can download from http://snakelets.sourceforge.net
(go to the SF project site, and then the file section).

Most relevant changes since 1.9:

* new feature: virtual hosts! (webapp config has changed!)
* page templates can now be parameterized
* uses sendfile(2) if available for high performance static file serving
   (see http://www.snakefarm.org/ for the extension module)
* fixed rather nasty object leak (reference cycles)
* added memory usage viewer to 'test' webapp.
* various bug fixes, improvements and updated documentation.


To start, edit the vhost config file (see docs) and
then run serv.py script, or the monitor.py script
if you want to start it as a daemon (on Unix). Enjoy!

Enjoy,
--Irmen de Jong.



From jcarlson at nospam.uci.edu  Fri Jan 30 22:13:12 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Fri, 30 Jan 2004 19:13:12 -0800
Subject: Python vs. Io
In-Reply-To: <711c7390.0401301710.4353274@posting.google.com>
References: <711c7390.0401291301.3f95794@posting.google.com>
	<qnkfzdyieg0.fsf@arbutus.physics.mcmaster.ca>
	<711c7390.0401301710.4353274@posting.google.com>
Message-ID: <bvf6kc$2v$2@news.service.uci.edu>

> IMHO, this makes more sense than iterating over a list created just
> for a specific loop. On my computer, Io's loops are faster than
> Python's (probably because they are lazy).

Haven't you heard of xrange?  It's like range, only without the list 
instantiation (and a few other things).


> But the community will grow larger in time. The Io community is bigger
> than the Python community two years after Python was released
> (although that's probably because it wasn't publicly released for two
> years).

I would also be willing to bet that is due to the ease of distribution 
that the modern internet allows, coupled with the current geek-chic of 
learning new-better-than-ever languages.  Heck, brainfuck probably has 
more users than Python did 2 years after its introduction, but that 
doesn't mean that you will be able to write programs that are better, 
more efficient, easier to update, easier to debug, etc., with BF than 
with some other newer language.


> Also, Python has statements (as opposed to just expressions) even for
> the simplest things like writing things to the command line. In Io,
> flow control is in functions, which can be overwritten if you want to
> change them. The Python philosophy is that if you allow this and other
> flexible things to happen, you will have inconsistent code. If someone
> asks on the Tutor mailing list how to change that, everybody responds
> "Why would you want to do that?". While that's a valid viewpoint, it's
> not the most flexible.

Perhaps it isn't more flexible.  On the other hand, it does allow anyone 
to read your code and know that there isn't any magical syntax that is 
usable on one Python x.y installation, that isn't on another.

  - Josiah


From jtdubs at eos.ncsu.edu  Sat Jan 24 12:12:23 2004
From: jtdubs at eos.ncsu.edu (Justin Dubs)
Date: 24 Jan 2004 09:12:23 -0800
Subject: pty difficulties
References: <2e262238.0401232202.5b21eba8@posting.google.com>
	<butccm$2un$1@news.service.uci.edu>
Message-ID: <2e262238.0401240912.1ca6bb74@posting.google.com>

Josiah Carlson <jcarlson at nospam.uci.edu> wrote in message news:<butccm$2un$1 at news.service.uci.edu>...
> >         while True:
> >             readable = select(connections.keys(), [], [])[0]
> >             for f in readable:
> >                 data = read(f.fileno(), 1024)
> >                 connections[f].write(data)
> >                 connections[f].flush()
> 
> I believe your problem exists in the write and flush.  All you seem to 
> be doing is checking to see if your reading file handles are capable of 
> reading, you never check to see if you can write to anything.  Your lisp 
> interpreter showcases the fact that it is not ready to get a write while 
> it is interpreting, by failing.  I believe the following should fix you up:
> 
>          while True:
>              readable = select(connections.keys(), [], [])[0]
>              for f in readable:
>                  if select([], [connections[f]], [], 0)[1]:
>                      data = read(f.fileno(), 1024)
>                      connections[f].write(data)
>                      connections[f].flush()

Thanks for the suggestions, but this didn't help.  I should have
mentioned that I had tried this before.  Here's the code I had used:

while True:
    readable, writeable, ignore = select(connections.keys(),
connections.values(), [])
    for f in readable:
        if connections[f] in writeable:
            data = read(f.fileno(), 1024)
            connections[f].write(data)
            connections[f].flush()

I don't think checking for writeable status /should/ help because the
write call I am using blocks.  So, if the stream isn't writeable, it
should just block until it is.  I think.

Justin Dubs


From newz at rekon.org.NOSPAM  Sun Jan 18 06:13:11 2004
From: newz at rekon.org.NOSPAM (Wil Schultz)
Date: Sun, 18 Jan 2004 03:13:11 -0800
Subject: Best way to do this?
In-Reply-To: <buddtg$gdmvb$1@ID-99293.news.uni-berlin.de>
References: <100jg9er3qak890@corp.supernews.com>
	<buddtg$gdmvb$1@ID-99293.news.uni-berlin.de>
Message-ID: <100kqbt2spltf3b@corp.supernews.com>

Okay, maybe I should have said the program should ask for the password 
up to 3 times, exiting on a) the correct password b) the third incorrect 
password.

Wil
my 2?
"When everything seems to be going well, you have obviously overlooked
something."


William Park wrote:
> Wil Schultz <newz at rekon.org.nospam> wrote:
> 
>>One of the exercises asks for a program to ask for a password three 
>>times. Surprisingly this took me much longer that it probably should 
>>have so I am curious if the following is the easiest way this is done. 
>>Thanks much!
>>
>>*************************************************
>>#!/usr/local/bin/python
>>
>>count = 0
>>password = "null"
>>
>>while count < 3:
>>         count = count + 1
>>         password = raw_input("what's the pass: ")
>>         if password == "mypass":
>>                 print "Access Granted"
>>                 count = 3
>>         else:
>>                 if count < 3:
>>                         print "Try Again"
>>                 else:
>>                         print "Too Bad"
>>*************************************************
> 
> 
> For crying out loud, here's 3 times for you...
>     password = raw_input("what's the pass: ")
>     password = raw_input("what's the pass: ")
>     password = raw_input("what's the pass: ")


From john at doe.com  Fri Jan 23 14:21:24 2004
From: john at doe.com (Brian Donovan)
Date: Fri, 23 Jan 2004 19:21:24 GMT
Subject: libxml2 w/ xpath python bindings
References: <pan.2004.01.23.18.58.27.798655@doe.com>
Message-ID: <pan.2004.01.23.19.21.10.758458@doe.com>


Turns out the issue was with the XML namespaces. The document had a
defualt namespace which had to be declared:

xmlDoc = libxml2.parseFile(base + '/' + curfile)
ctxt = xmlDoc.xpathNewContext()
ctxt.xpathRegisterNs('rng',"http://relaxng.org/ns/structure/1.0")

elements = ctxt.xpathEval('//rng:element/@name')
for e in elements:
  rnc.elements.append(e.content)

On Fri, 23 Jan 2004 18:58:34 +0000, Brian Donovan wrote:

> Hi All,
> 
>   I'm trying to get xpath to work with the libxml2 python bindings.
> I'm using the following
> 
> doc = libxml2.parseFile(filename)
> result = doc.xpathEval('//*')
> 
> My test XML file has 10 nodes in it and I'm trying to get an element named
> 'element' (from an relaxng schema). 
> 
> If I use the xpath expression '//*' I'll get a list with 10 nodes
> including the element element as expected. If I try '//element' I'm
> getting an empty list with no errors. Any idea where I could be going
> wrong?
> 
> Brian



From chris.lyon at spritenote.co.uk  Tue Jan 13 11:23:46 2004
From: chris.lyon at spritenote.co.uk (Chris Lyon)
Date: 13 Jan 2004 08:23:46 -0800
Subject: Does anyone else not find the fun in programming...?
Message-ID: <d232c5e.0401130823.27fd26ff@posting.google.com>

I find python very effective as a language and can generally project
most of my hazy thoughts into it. But FUN !!! This is work dammit,
I have now ground my teeth down from the number of times I read that
programming is fun. Football (association) is fun, walking along
canals is fun, Arguing about quite how useless the British Government
is fun but programming  ?

Do I need help ?

(Actually typing this was quite fun, so perhaps)


From nsm38 at student.cpit.ac.nz  Thu Jan 29 18:20:08 2004
From: nsm38 at student.cpit.ac.nz (nadia)
Date: 29 Jan 2004 15:20:08 -0800
Subject: Job Wanted - New Zealand
Message-ID: <9caa8908.0401291520.187c557a@posting.google.com>

Hi,

I am a recent IT graduate, who has some experince using Python. I
would like the opportunity to expand my experince with python. I am
currently based in christchurch, though I will be willing to move.

I also have experince using PHP, XML, Java, JavaSCript, mySQL, VB, C,
SQL.

My home page (which has a copy of my CV and work I have done) is:

http://home.clear.net.nz/pages/eamonreyn/

Thanks
Nadia.


From astrand at lysator.liu.se  Sun Jan  4 08:38:53 2004
From: astrand at lysator.liu.se (=?iso-8859-1?Q?Peter_=C5strand?=)
Date: Sun, 4 Jan 2004 14:38:53 +0100 (CET)
Subject: Is Python Mac Centric??? 
Message-ID: <Pine.LNX.4.44.0401041425440.6970-100000@aristocat.lysator.liu.se>


[About including win32 into the Python core distribution]

martin at v.loewis.de:

>Mark is unlikely to request it because he doesn't want to wait a year for
>the next Python release just to release the next version of PythonWin.

I don't understand why this is necessary. win32 is just a bunch of
additional modules. Let's say that these were included in, say, Python
2.4. Wouldn't it be possible for Mark to release an updated package that
just replaces the modules included in 2.4? You could call it a "win32
servicepack X for Python Y.Z". 


Tim Peters (tim.one at comcast.net):

>Mark likes having a release schedule independent of Python's, and Guido
>hates Mark's coding style.  Both act against folding the Windows
>extensions into the core.

So, theoretically, if another person stepped forward that re-indented the 
source code and was happy about following the Python release schedule, 
then the extensions could be added? 


I think it's a shame that such minor issues as coding style and release 
schedules should block an important thing like this. 

-- 
/Peter ?strand <astrand at lysator.liu.se>





From jcarlson at nospam.uci.edu  Sun Jan 25 01:04:36 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Sat, 24 Jan 2004 22:04:36 -0800
Subject: Text Animation
In-Reply-To: <7b454334.0401242038.11404dac@posting.google.com>
References: <7b454334.0401242038.11404dac@posting.google.com>
Message-ID: <buvmdj$pf9$1@news.service.uci.edu>

Fazer wrote:
> Hello,
> 
> I was wondering if anyone has done any simple text-based animation?
> 
> I mean things such as text-based pre-loaders.  One example would be
> when you use the *nix utility called `wget.` You get that fancy "
> ====> " type of animation as you download a large file.  Or maybe even
> a rotating " | " that I have seen before in some installation
> programs.
> 
> Any ideas how these effects can be achieved?
> 
> Thanks a lot!
> 
> Faizan


Yeah, don't print linefeed ('\n') characters, only print carriage 
returns ('\r').

import time
for i in xrange(75):
     print '*'*i, '\r',
     time.sleep(.1)

  - Josiah


From max at alcyone.com  Thu Jan 22 20:44:16 2004
From: max at alcyone.com (Erik Max Francis)
Date: Thu, 22 Jan 2004 17:44:16 -0800
Subject: Mixing protocols in pickles?
Message-ID: <40107C70.13CA8495@alcyone.com>

Is there any prohibition against mixing different protocols within the
same pickle?  I don't see anything about this in the Python Library
Reference and, after all, the pickle.dump function takes a protocol
argument for each time it's called.  (This is in Python 2.3.3.)

I have a pickle containing two objects: a tag string and a (large)
object containing many children.  The identifying string is there so
that you can unpickle it and decide whether you really want to unpickle
the whole data object.

So I thought it would be clever to write the tag string with protocol 0
so it would show up in a file viewer as plain text and then write the
rest of the data with protocol 1 (or 2; it doesn't use new-style
classes, though).  I open the file in binary mode and then dump the tag
string in protocol 0, then the (big) instance data in protocol 1.  When
loading time comes around, they're just both loaded in the same order:

def load(filename=DEFAULT_FILENAME):
    try:
        inputFile = gzip.GzipFile(filename + COMPRESSED_EXTENSION, 'rb')
    except IOError:
        inputFile = file(filename, 'rb')
    tag = pickle.load(inputFile)
    if DEBUG:
        print >> sys.stderr, "Tag: %s" % tag
    system = pickle.load(inputFile)
    inputFile.close()
    return system

def save(system, tag, filename=DEFAULT_FILENAME, protocol=1,
compressed=False):
    if compressed:
        outputFile = gzip.GzipFile(filename + COMPRESSED_EXTENSION,
'wb')
    else:
        outputFile = file(filename, 'wb')
    pickle.dump(tag, outputFile, 0) # write the tag in text
    pickle.dump(system, outputFile, protocol)
    outputFile.close()

This works fine on Unix, but on Windows it generates the (utterly
puzzling) error:

C:\My Documents\botec-0.1x1>python -i ./botex.py
Tag: default.botec:20040110:11175:ebec37a7632cc7176ff359a3754750ec:0.1x1
Traceback (most recent call last):
  File "./botex.py", line 70, in ?
    SYSTEM = init()
  File "./botex.py", line 15, in init
    return load()
  File "C:\My Documents\botec-0.1x1\botec.py", line 1666, in load
    system = pickle.load(inputFile)
ImportError: No Module named copy_reg
>>>

... made extra puzzling because you can type `import copy_reg' on that
prompt and it will import fine.  Googling for this error comes up with a
few scattered complaints but nothing coherent about the cause.  When I
modify the dumping routine to use the same protocol (1) for both dumps,
the problem goes away and everything works fine.

So I guess there are a few questions:  Why is the error being generated
so obscure and seemingly incorrect?  Is it really the case that mixing
multiple protocols within the same pickle isn't allowed, or is this
truly a bug (or, say, a Windows-specific problem because protocol 0
requires that the pickle file be in text mode?)?

-- 
 __ Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
/  \ San Jose, CA, USA && 37 20 N 121 53 W && &tSftDotIotE
\__/ Love is the most subtle form of self-interest.
    -- Holbrook Jackson


From crescent_au at yahoo.com  Fri Jan  2 06:56:13 2004
From: crescent_au at yahoo.com (Ben)
Date: 2 Jan 2004 03:56:13 -0800
Subject: cgi using what?
Message-ID: <d99e1341.0401020356.5226878f@posting.google.com>

Hi all,

I wanna use Python for creating a questionnaire. Is it a good choice
using python on the basis of its availability? I wanna know if most
servers support python or not... I don't know about the server yet..
so which language will be a good choice?

Ben


From me at privacy.net  Tue Jan 13 17:33:03 2004
From: me at privacy.net (James Keasley)
Date: 13 Jan 2004 22:33:03 GMT
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
	<K_YMb.10994$9k7.204413@news.xtra.co.nz>
	<bu1qq3$cu440$1@ID-207230.news.uni-berlin.de>
Message-ID: <slrnc08sfp.44h.me@localhost.localdomain>

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

In article <bu1qq3$cu440$1 at ID-207230.news.uni-berlin.de>, Brandon J. Van Every wrote:
> 
> "Peter Ashford" <me at here.there.com> wrote in message
> news:K_YMb.10994$9k7.204413 at news.xtra.co.nz...
>> Brandon, don't be such an arsehole.  OS developers do things their own
>> way and offer their labour for free.  If you don't like it noone will
>> care - but don't denegrate people just because they don't do things your
>> way.
> 
> I'll denigrate them all I want.  With rare exceptions, they aren't a value
> add to what I want to get done.  There's this huge cultural divide between
> hobbyists and commercialists.

Yeah, one lot write software that works, the others write software that'll
make them money for fixing their own mistakes after the fact ;)


- -- 
James						jamesk[at]homeric[dot]co[dot]uk

'Honesty is the best policy, but insanity is a better defense'
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From carroll at tjc.com  Sat Jan 24 19:24:45 2004
From: carroll at tjc.com (Terry Carroll)
Date: Sun, 25 Jan 2004 00:24:45 GMT
Subject: time.time()
References: <buubug$rcj$1@solaris.cc.vt.edu>
	<7cf510d1k3ug79am8s709ebhar2sspjlm2@4ax.com>
	<buunre$ffe$1@solaris.cc.vt.edu>
Message-ID: <i33610th442ckr0lkmgeqq154eirqfcv78@4ax.com>

On Sat, 24 Jan 2004 16:25:01 -0500, Bart Nessux <bart_nessux at hotmail.com>
wrote:

>Terry Carroll wrote:
>
>> It sounds like you're thinking time.time() does something else, which
>> you're trying to do.  What is that?  There might be another function for
>> you.
>
>I should have been more clear... here's the code:
>
>x = time.time()
>fp = os.popen("some_process", "r")
>fp.read()
>fp.close()
>print (time.time()-x/60)/60

Ah.  You have a precedence problem.

Try: 

print ((time.time()-x)/60)/60




From google at klaff.org  Tue Jan  6 16:52:32 2004
From: google at klaff.org (David Klaffenbach)
Date: 6 Jan 2004 13:52:32 -0800
Subject: Starting a script interactively?
References: <37d5fe8f.0401021305.349a440@posting.google.com>
	<3FFAB968.3B8DDDC1@engcorp.com>
Message-ID: <37d5fe8f.0401061352.371cd9ac@posting.google.com>

Peter Hansen <peter at engcorp.com> wrote in message news:<3FFAB968.3B8DDDC1 at engcorp.com>...
<snip>
> import os
> os.environ['PYTHONINSPECT'] = '1'
> 
> (untested)

Tested now!  Just what I was looking for!

Thanks,  Dave

replies to google at klaff.org will bounce; replace 'google' with the
name of your favorite programming language to get a good address.


From claird at lairds.com  Wed Jan 14 13:30:13 2004
From: claird at lairds.com (Cameron Laird)
Date: Wed, 14 Jan 2004 18:30:13 -0000
Subject: I come not to bury C++, but to praise it...
References: <mailman.337.1074032524.12720.python-list@python.org>
	<bu3khe$dbm5v$1@ID-46268.news.uni-berlin.de>
	<100aq779r2h2c9e@corp.supernews.com>
	<bu3vku$den0t$1@ID-46268.news.uni-berlin.de>
Message-ID: <100b2llg67r546f@corp.supernews.com>

In article <bu3vku$den0t$1 at ID-46268.news.uni-berlin.de>,
Derek <none at none.com> wrote:
			.
			.
			.
>Yes, I prefer compile-time checks to run-time checks.  I don't know
>which method is "better" by any objective measure, but I prefer to
>know if there is a problem as early as possible.  It's not hard to
>make a change in Python that will go unnoticed until much later, and
>in the real world test suites often don't have enough coverage to
>catch every runtime error up front.
>
>

Got it; thanks.  There's been extensive discussion here and elsewhere
on just this point.  One of us might follow-up in a bit with a refer-
ence to highlights ...  While I spend most of my time in the Trotskyite
fringe of those who proclaim that Testing Is The Answer, and that 
compile-time checks count for little, I'm deeply sympathetic with the
anguish of letting the latter go.  'Fact, I just spent the morning do-
ing "-Wall" to yet another corpus of unsanitized code, and *I* feel a
lot better for it.
-- 

Cameron Laird <claird at phaseit.net>
Business:  http://www.Phaseit.net


From paul at boddie.net  Tue Jan  6 05:31:09 2004
From: paul at boddie.net (Paul Boddie)
Date: 6 Jan 2004 02:31:09 -0800
Subject: PEP 324: popen5 - New POSIX process module
References: <mailman.121.1073343223.12720.python-list@python.org>
Message-ID: <23891c90.0401060231.1b7a26b5@posting.google.com>

Paul Moore <paul.moore at atosorigin.com> wrote in message news:<mailman.121.1073343223.12720.python-list at python.org>...
> 
> The whole interface feels very Unix-specific.

Well, the subject of the original message did mention POSIX
explicitly. ;-)

Seriously, it would be very nice to have something equivalent on
Windows that works as well as the POSIX-like implementations without
the user of the module needing to use various arcane tricks to prevent
deadlock between parent and child processes. Of course, as people
often mention, Windows operating systems do have some POSIX API
support, although their compliance to the POSIX standard seems to be
best described as being at the "version 0.1a1" level.

Paul


From jjl at pobox.com  Mon Jan 12 13:56:51 2004
From: jjl at pobox.com (John J Lee)
Date: Mon, 12 Jan 2004 18:56:51 +0000 (GMT)
Subject: Databases: Which one's right for me?
In-Reply-To: <1073925556.6341.403.camel@localhost.localdomain>
References: <4378fa6f.0401091717.1ae63541@posting.google.com> 
	<qu7000dot866j3qd9hi6hgkh4np5nuq7fa@4ax.com> <878ykf71g6.fsf@pobox.com>
	<1073925556.6341.403.camel@localhost.localdomain>
Message-ID: <Pine.LNX.4.58.0401121848310.5520@alice>

On Mon, 12 Jan 2004, Jeremy Hylton wrote:
> On Sat, 2004-01-10 at 19:50, John J. Lee wrote:
[...about ZODB...]
> > Which doesn't have a built-in query system, so isn't a database in the
> > same way as a relational DB like Postgres or Oracle.  It's more like
> > BSDDB + pickle.
>
> A database is a lot more than a query system, although for some
> applications query support is very important.  Zope has a custom query
> system, called the catalog, that is built on top of ZODB.

I thought ZCatalog was dependent on Zope?

There is IndexedCatalog, of course.


> Whether ZODB
> sans a builtin query system is suitable really depends on the
> application.

Of course.


John



From nospam-deets at web.de  Mon Jan 12 10:28:55 2004
From: nospam-deets at web.de (Diez B. Roggisch)
Date: Mon, 12 Jan 2004 16:28:55 +0100
Subject: Using switches with exec?
References: <mailman.293.1073914775.12720.python-list@python.org>
Message-ID: <btue6p$bdf88$1@ID-111250.news.uni-berlin.de>

> I need to run a Python program dynamically within
> another program. I am using exec for the purpose. Is
> there a way to pass parameter switches to exec?

You can pass a globals-dictionary to exec, which can hold the switches
values. 

Diez


From ras at holmes.nl  Tue Jan 27 11:29:11 2004
From: ras at holmes.nl (Martijn Ras)
Date: Tue, 27 Jan 2004 17:29:11 +0100
Subject: os.path.split: processing paths from one OS on another
Message-ID: <401691D7.8050607@holmes.nl>

Heya folks,

I ran into the following problem:

When i run this on Windows everything is as expected:
C:\>python
Python 2.2.3 (#42, May 30 2003, 18:12:08) [MSC 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
 >>> import os
 >>> file='/TEST/FILE.EXT'
 >>> print os.path.split(file)
('/TEST', 'FILE.EXT')
 >>> file='C:\\TEST\\FILE.EXT'
 >>> print os.path.split(file)
('C:\\TEST', 'FILE.EXT')

However, when i run this on Linux the results are unexpected:
$ python
Python 2.2.3 (#1, Nov 12 2003, 15:53:11)
[GCC 2.96 20000731 (Red Hat Linux 7.3 2.96-110)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
 >>> import os
 >>> file='/TEST/FILE.EXT'
 >>> print os.path.split(file)
('/TEST', 'FILE.EXT')
 >>> file='C:\\TEST\\FILE.EXT'
 >>> print os.path.split(file)
('', 'C:\\TEST\\FILE')

All i can find is some comments on POSIX-ness (or not) of the OS, in 
regard to os.path.split(), but i fail to see why that explains the 
different outcome of the last command in the two examples above.

My server needs to be run on either Linux or Windows, it receives 
requests from clients that may run either OS. To process those requests 
i need to split the path and filename. I hoped to solves this using 
os.path.split (), any suggestions as to how to fix this?

Mazzel,

Martijn.



From ashleylloyd at hotmail.com  Fri Jan  9 08:53:30 2004
From: ashleylloyd at hotmail.com (Ashley Lloyd)
Date: Fri, 09 Jan 2004 13:53:30 +0000
Subject: Debugging Python
Message-ID: <BAY99-F680yNu8O2XIC00032563@hotmail.com>

What do people generally use to debug their Python programs? I haven't seen 
anything out there that walks through the code, but perhaps I'm looking in 
the wrong places?

TIA

Ashley

_________________________________________________________________
Tired of 56k? Get a FREE BT Broadband connection 
http://www.msn.co.uk/specials/btbroadband




From cwilcox at etcconnect.com  Fri Jan 23 13:59:38 2004
From: cwilcox at etcconnect.com (Christian Wilcox)
Date: Fri, 23 Jan 2004 12:59:38 -0600
Subject: [OPINION] - does language really matter if they all do the
	samething?
Message-ID: <69A0D4AB81C51447AD6BA387782B8D64093D8A@midl-mail4.etcconnect.com>

> Programming languages affect the way people
> think about problem solving in different ways.  The capacity to
> solve problems is one of the most important capacities a
> programmer can expect to have.  In addition, it is the
> responsibility of the programmer to see that some languages are,
> by virtue of their design, made to solve certain problems in
> certain ways, under various definitions of program flow, data
> storage, etc.  To suppose that all programming languages are,
> as you might put it, fundamentally equivalent is to suppose
> that english and arabic are, in the same sense, just two sides
> of the same coin, which is a gross oversimplification of the
> matter and a disrespect to the qualities of the languages
> that make them distinct.  On a more conjectural note, spoken
> languages are more than just ways of expressing ideas; by
> virtue of being evolving systems of communication, they serve
> as an insight into the culture and people that developed
> them.  Programming languages are the same in that respect.

You might find this http://www.artima.com/intv/craft.html artima.com interview (especially the section "Learning Languages") with Yukihiro Matsumoto, creator of Ruby, interesting.  He discusses how certain programming languages focus on specific paradigms, which could allow a programmer to think in ways they may not otherwise.

Python doesn't necessarily force any specific paradigm, which is one of it's selling points, IMO.

Christian Wilcox



From sross at connectmail.carleton.ca  Sun Jan 25 11:08:26 2004
From: sross at connectmail.carleton.ca (Sean Ross)
Date: Sun, 25 Jan 2004 11:08:26 -0500
Subject: xrange not hashable - why not?
References: <mailman.764.1075042048.12720.python-list@python.org>
Message-ID: <FSRQb.95$qU3.31981@news20.bellglobal.com>


"Gerrit Holl" <gerrit at nl.linux.org> wrote in message
news:mailman.764.1075042048.12720.python-list at python.org...
> Hi,
>
> why is an xrange object not hashable?


I don't know the answer for this.


> I was trying to do something like:
>
> comments = {
>     xrange(0, 4): "Few",
>     xrange(4, 10): "Several",
>     xrange(10, 100): "A lot",
>     xrange(100, sys.maxint): "Can't count them"}
> for (k, v) in comments.items():
>     if n in k:
>         commentaar = v
>         break

There's a bit of an efficiency issue with using 'n in k' for something like
xrange(100, sys.maxint),
since you have to walk through the items in that range to see if n is in
there, and that's a large range.
Perhaps this would help:

class bounds:
    def __init__(self, start, stop, step=1):
        self.start = start
        self.stop = stop
        self.step = step
    def is_step(self, other):
            q, r = divmod(other-self.start, self.step)
            return r == 0
    def __contains__(self, other):
        return self.start <= other < self.stop and self.is_step(other)
    def __hash__(self):
        return id(self)
    def __repr__(self):
        return "bounds(start=%s, stop=%s, step=%s)"%\
               (self.start, self.stop, self.step)

import sys
import random

comments = {
    bounds(0, 4): "Few",
    bounds(4, 10): "Several",
    bounds(10, 100): "A lot",
    bounds(100, sys.maxint): "Can't count them"}

n = random.randint(0, sys.maxint)
print n

for k, v in comments.iteritems():
    print k
    if n in k:
        print v
        break
else:
    print n, "out of bounds"

HTH,
Sean




From jacek.generowicz at cern.ch  Wed Jan 14 04:38:04 2004
From: jacek.generowicz at cern.ch (Jacek Generowicz)
Date: 14 Jan 2004 10:38:04 +0100
Subject: Python is far from a top performer according to benchmark
	test...
References: <ryELb.238$tK2.228@amstwist00>
	<6ee58e07.0401092129.302cb9d4@posting.google.com>
	<pan.2004.01.11.06.08.18.867825@yahoo.com>
	<bttu62$gdh$1@newstree.wise.edt.ericsson.se>
	<btvsvl$pu7$1@panix3.panix.com>
	<95aa1afa.0401130424.49749912@posting.google.com>
	<tyf65fgdm81.fsf@pcepsft001.cern.ch>
	<95aa1afa.0401132224.1a8230c@posting.google.com>
Message-ID: <tyf1xq2eupv.fsf@pcepsft001.cern.ch>

michele.simionato at poste.it (Michele Simionato) writes:

> Jacek Generowicz <jacek.generowicz at cern.ch> wrote in message news:<tyf65fgdm81.fsf at pcepsft001.cern.ch>... 
> > Go on, raise your hand if you thought that "Lisp" is a slow,
> > interperted functional langugage.
> 
> Never thought so.

Michele,

My post was not aimed at you specifically. It was aimed a lurkers who
might infer that Lisp is only used in AI (or whatever), or who might
have some unfounded assumptions about Lisp which would be re-inforced
by your post.

I was quite sure that my post would not be telling _you_ much you
didn't already know.


From maarten at remove_this_ws.tn.tudelft.nl  Tue Jan 20 05:46:59 2004
From: maarten at remove_this_ws.tn.tudelft.nl (Maarten van Reeuwijk)
Date: Tue, 20 Jan 2004 11:46:59 +0100
Subject: Looking for very simple general purpose tokenizer
References: <bug9ij$30k$1@news.tudelft.nl>
Message-ID: <buj0v4$7ae$1@news.tudelft.nl>

Thank you all for your very useful comments. Below I have included my
source. Could you comment if there's a more elegant way of implementing the
continuation character &? 

With the RE implementation I have noticed that the position of the '*' in
spclist is very delicate. This order works, but other orders throw
exceptions. Is this correct or is it a bug? Lastly, is there more
documentation and examples for the shlex module? Ideally I would like to
see a full scale example of how this module should be used to parse.

Maarten   

import re
import shlex
import StringIO

def splitf90(source):
   buf = StringIO.StringIO(source)
   toker = shlex.shlex(buf)
   toker.commenters = "!"
   toker.whitespace = " \t\r"
   return  processTokens(toker)

def splitf90_re(source):
   spclist = ['\*', '\+', '-', '/', '=','\[', '\]', '\(', '\)' \
              '>', '<', '&', ';', ',', ':', '!', ' ', '\n']
   pat = '|'.join(spclist) + '|[^' + ''.join(spclist) + ']+'
   rawtokens = re.findall(pat, source)
   return processTokens(rawtokens)

def processTokens(rawtokens):
   # substitute characters
   subst1 = []
   prevtoken = None
   for token in rawtokens:
      if token == ';': token = '\n'
      if token == ' ': token = ''
      if token == '\n' and prevtoken == '&': token = ''
      if not token == '':
         subst1.append(token)
      prevtoken = token

   # remove continuation chars
   subst2 = []
   for token in subst1:
      if token == '&': token = ''
      if not token == '':
         subst2.append(token)

   # split into lines
   final = []
   curline = []
   for token in subst2:
      if not token == '\n':
         curline.append(token)
      else:
         if not curline == []:
            final.append(curline)
            curline = []

   return final

# Example session
src = """
MODULE modsize
implicit none

integer, parameter::  &
    Nx =  256, &
    Ny =  256, &
    Nz =  256, &
    nt =    1, &  ! nr of (passive) scalars
    Np =   16     ! nr of processors, should match mpirun -np .. command

END MODULE
"""
print splitf90(src)
print splitf90_re(src)

Output:
[['MODULE', 'modsize'], ['implicit', 'none'], ['integer', ',', 'parameter',
':', ':', 'Nx', '=', '256', ',', 'Ny', '=', '256', ',', 'Nz', '=', '256',
',', 'nt', '=', '1', ',', 'Np', '=', '16'], ['END', 'MODULE']]

[['MODULE', 'modsize'], ['implicit', 'none'], ['integer', ',', 'parameter',
':', ':', 'Nx', '=', '256', ',', 'Ny', '=', '256', ',', 'Nz', '=', '256',
',', 'nt', '=', '1', ',', '!', 'nr', 'of', '(', 'passive', 'scalars'],
['Np', '=', '16', '!', 'nr', 'of', 'processors', ',', 'should', 'match',
'mpirun', '-', 'np', 'command'], ['END', 'MODULE']]

-- 
===================================================================
Maarten van Reeuwijk                        Heat and Fluid Sciences
Phd student                             dept. of Multiscale Physics
www.ws.tn.tudelft.nl                 Delft University of Technology


From jcarlson at nospam.uci.edu  Fri Jan 23 00:49:10 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Thu, 22 Jan 2004 21:49:10 -0800
Subject: I support PEP 326
In-Reply-To: <roy-1E6566.21133122012004@reader2.panix.com>
References: <mailman.654.1074788734.12720.python-list@python.org>
	<401081A1.E4C34F00@alcyone.com>
	<roy-1E6566.21133122012004@reader2.panix.com>
Message-ID: <buqcoh$m72$2@news.service.uci.edu>

> I suppose you could special-case min() and max() to return the 
> appropriate singletons if called with no arguments.
> 
> There's something very nice about that.  There's also something very 
> ugly about it.  I'm having a hard time deciding which is stronger :-)

That behavior was called very bad names by Guido.  We shall not speak of 
it any longer.  Heh.

  - Josiah


From wsanchez at wsanchez.net  Mon Jan 12 19:39:34 2004
From: wsanchez at wsanchez.net (=?ISO-8859-1?Q?Wilfredo_S=E1nchez?=)
Date: Mon, 12 Jan 2004 16:39:34 -0800
Subject: setproctile()?
Message-ID: <F56491BD-4560-11D8-BCE4-000A95AFAE2C@wsanchez.net>

   Is there a way to set the kernel's notion of a python process' name 
on Unix such that, for example, ps shows what I specify?

     -wsv




From r.s at ZZmindspring.com  Tue Jan  6 14:57:11 2004
From: r.s at ZZmindspring.com (r.e.s.)
Date: Tue, 06 Jan 2004 19:57:11 GMT
Subject: looping to define a sequence of functions?
References: <T9EKb.23248$lo3.20297@newsread2.news.pas.earthlink.net>
	<ihEKb.766349$Fm2.732789@attbi_s04>
Message-ID: <rqEKb.23262$lo3.20889@newsread2.news.pas.earthlink.net>

"Rainer Deyke" <rainerd at eldwood.com> wrote ...
> r.e.s. wrote:
> > Suppose we want to define ten functions such that the
> > nth function of x simply returns x**n. Is there a way
> > to avoid explicitly writing ten function def's? (They
> > have to be ten distinct functions, not just a single
> > one like def f(n,x): return x**n.)
> 
> functions = [lambda x, n=n: x**n for n in range(10)]
> 
> -or-
> 
> class X(object):
>   def __init__(self, n):
>     self.n = n
>   def __call__(self, x):
>     return x ** self.n
> functions = [X(n) for n in range(10)]
> 
> -or-
> 
> functions = []
> for n in range(10):
>   def f(x, n=n):
>     return x**n
>   functions.append(f)
> 
> -or-
> 
> def create_function(n):
>   def f(x):
>     return x**n
>   return f
> functions = [create_function(n) for n in range(10)]
> 
> 
> -- 
> Rainer Deyke - rainerd at eldwood.com - http://eldwood.com

It's going to take me a bit to digest these, and
it looks like I'm sure to learn from them, so I 
want to say 'thank you' now for the quick reply.


From r.s at ZZmindspring.com  Tue Jan  6 14:39:31 2004
From: r.s at ZZmindspring.com (r.e.s.)
Date: Tue, 06 Jan 2004 19:39:31 GMT
Subject: looping to define a sequence of functions?
Message-ID: <T9EKb.23248$lo3.20297@newsread2.news.pas.earthlink.net>

Suppose we want to define ten functions such that the
nth function of x simply returns x**n. Is there a way 
to avoid explicitly writing ten function def's? (They 
have to be ten distinct functions, not just a single 
one like def f(n,x): return x**n.)
 
E.g., the following doesn't work:

f = {}
for n in range(10):
    def f[n](x):
        return x**n

Thanks.
--
r.e.s.


From peter at engcorp.com  Tue Jan 20 17:45:03 2004
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 20 Jan 2004 17:45:03 -0500
Subject: an example of a singleton design pattern in python?
References: <hc63caapdui.fsf@praxis.lsil.com>
	<du7smiacnwx.fsf@mozart.cc.tut.fi>
Message-ID: <400DAF6F.6EF66415@engcorp.com>

Ville Vainio wrote:
> 
> >>>>> "Daniel" == Daniel Ortmann <dortmann at lsil.com> writes:
> 
>     Daniel> Hello, Does anyone have an example of a singleton design
>     Daniel> pattern in python?
> 
> This trivial snippet might be enough for your needs:
> 
> class Foo():
>     pass
> 
> _inst = None
> 
> def fooinstance():
>     if not _inst:
>         _inst = Foo()
>     return _inst

Looks like at least two errors, one being the parentheses on the
class name, and the other being a failure to flag _inst as being
global...

-Peter


From grahamd at dscpl.com.au  Sat Jan 31 04:50:18 2004
From: grahamd at dscpl.com.au (Graham Dumpleton)
Date: 31 Jan 2004 01:50:18 -0800
Subject: Automatic access serialization
References: <946d2ebc.0401301753.5bbe87c5@posting.google.com>
Message-ID: <dc6f5c99.0401310150.97fdf1c@posting.google.com>

gagenellina at softlab.com.ar (Gabriel Genellina) wrote in message news:<946d2ebc.0401301753.5bbe87c5 at posting.google.com>...
> Hello!
> 
> I have a number of objects that are not thread-safe - no locking
> mechanism was originally provided.
> But I want to use them in a thread-safe way. I don't want to analyze
> each class details, looking for where and when I must protect the
> code. So I wrote this sort-of-brute-force locking mechanism using
> threading.RLock() around __getattr__ / __setattr__ / __delattr__.
> The idea is that *any* attribute and method access is protected by the
> lock. The calling thread may acquire the lock multiple times, but
> other threads must wait until it is released.
> This may be too much restrictive, and a bottleneck in performance,
> since *all* accesses are effectively serialized - but it's the best I
> could imagine without deeply analyzing the actual code.
> I *think* this works well, but since I'm not an expert in these
> things, any comments are welcome. Specially what could go wrong, if
> someone could anticipate it.
> Note: As written, this only works for old-style classes. I think that
> just by adding a similar __getattribute__ would suffice for new-style
> classes too - is that true?

A few problems that I can see. First is that this only protects access to
the reference to the data in question. Imagine that the data value
is a dictionary. If I understand it correctly, two different threads
could still get a reference to the same dictionary and then independently
start modifying the dictionary at the same time. This is because you are
then dealing with the dictionary directly and your locks aren't involved
at all.

Second is that it isn't always sufficient to lock at the level of individual
attributes, instead it sometimes necessary to lock on a group of attributes
or even the whole object.  This may be because a thread has to be able
to update two attributes at one time and know that another thread will
not change one of them while it is modifying the other.

One hack I have used is always ensuring that access to an object is
through its functional interface and then locking at the level of
function calls. That is provide additional member functions called
lockObject and unlockObject which operate the thread mutex. When
using the class then have:

  object.lockObject()
  object.someFunc1()
  object.someFunc2()
  object.etc()
  object.unlockObject()

This can sort of be automated a bit by having:

class _SynchronisedMethod:

  def __init__(self,object,name):
    self._object = object
    self._name = name
  
  def __getattr__(self,name):
    return _SynchronisedMethod(self._object,"%s.%s"%(self._name,name))

  def __call__(self,*args):
    try:
      self._object.lockObject()
      method = getattr(self._object,self._name)
      result = apply(method,args)
      self._object.unlockObject()
    except: 
      self._object.unlockObject()
      raise
    return result

class _SynchronisedObject:

  def __init__(self,object):
    self._object = object

  def __getattr__(self,name):
    return _SynchronisedMethod(self._object,name)

You can then say:

  sync_object = _SynchronisedObject(object)

  sync_object.someFunc1()
  sync_object.someFunc2()
  sync_object.etc()

Although this avoids the explicit calls to lock the object, it still isn't the
same thing. This is because in the first example, the lock was held across
multiple function calls whereas in the second case it is only held for a
single call. Thus something like the following could fail:

  if sync_object.dataExists():
    sync_object.getData()

This is because something could have taken the data between the time
the check for data was made and when it was obtained.

Thus automating it like this isn't foolproof either. The closest you will
probably get to a quick solution is to have the lock/unlock functions
for the object and change any code to use them around any sections of
code which you don't want another thread operating on the class at
the same time. You may even have to hold locks on multiple objects
at the same time to ensure that things don't get stuffed up.

Thus it isn't necessarily a simple task to add threading support after
the fact. You probably will have no choice but to analyse the use of
everything and work out to correctly implement locking or even change
the functional interface a bit so functions can be atomic in themselves.
Ie., rather than having to check if data exists before first getting it,
you just try and get it and either rely on an exception or have the
thread wait until data is there.


From exarkun at intarweb.us  Wed Jan  7 20:04:23 2004
From: exarkun at intarweb.us (Jp Calderone)
Date: Wed, 7 Jan 2004 20:04:23 -0500
Subject: PRE-PEP: new Path class
In-Reply-To: <3FFC9209.7060703@beyond-thoughts.com>
References: <vvivefh35qjv9a@news.supernews.com>
	<3FFA7E82.4020609@beyond-thoughts.com>
	<mailman.159.1073418070.12720.python-list@python.org>
	<3FFC9209.7060703@beyond-thoughts.com>
Message-ID: <20040108010423.GA13398@intarweb.us>

On Thu, Jan 08, 2004 at 12:11:05AM +0100, Christoph Becker-Freyseng wrote:
> [snip]
>
> openwith would be a nice add-on. I see two problems with it:
> 1.) it's long. I mean
>    f(str(path), *args)
>    is shorter than
>    path.openwith(f, *args)
> I got an idea of shortening this and making it look a bit like shell
> (I'm not convinced of it very much, but I didn't want to keep it secret 
> --- maybe others like it ...)
> 
> path > (f, arg1, arg2, ...)
> 
> (this works by overwriting path.__gt__)

  You shoulda kept it secret.  That's horrible.  If you're going to override
a piece of syntax for this, I think nothing makes as much sense as __call__
(but I don't think that makes much sense either).

  Jp



From ods at strana.ru  Tue Jan 27 10:46:02 2004
From: ods at strana.ru (Denis S. Otkidach)
Date: Tue, 27 Jan 2004 18:46:02 +0300 (MSK)
Subject: [ANN] ip2cc-0.3: now it works with Python 2.3
Message-ID: <Pine.LNX.4.44L.0401271843580.14308-100000@ods.pravda.rfn.ru>


		  ip2cc: Lookup country country by IP address
                  ===========================================

WHAT IS IT

If you want to gather web statistics by countries (not by top-level
domains) or implement targeting, here is solution: ip2cc.  This module
allows to resolve country from IP address.

USAGE

update.py                   - build/update database
ip2cc.py <address>          - print country name for which
                              <address> is registered
For example:
$ ./ip2cc.py python.org
python.org (194.109.137.226) is located in NETHERLANDS
$ ./ip2cc.py google.com.ru
google.com.ru (216.239.33.100) is located in UNITED STATES

Module can be used as CGI.

WHERE TO GET

Homepage: http://ppa.sf.net/#ip2cc
Download: http://prdownloads.sf.net/ppa/ip2cc-0.3.tar.gz?download

LICENSE

Python-style

ACKNOWLEDGEMENTS

Jason R. Mastaler
Fredrik Lundh

CHANGES

0.3	- Due to bug in bsddb module (http://python.org/sf/788421) it's
	  rewriten to use very simple own database.

0.2	- Adopted to new format of registrars.
	- Added LACNIC to sources.
	- Fixed contry code map and added -check option to simplify
	  maintainance.

0.1	Initial release

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




From neanthumain at yahoo.com  Sat Jan 10 19:44:02 2004
From: neanthumain at yahoo.com (N?ant Humain)
Date: 10 Jan 2004 16:44:02 -0800
Subject: Providing Default Value for User Input
Message-ID: <e3b4dc29.0401101644.1f71eb8b@posting.google.com>

I have just begun learning Python so that I can write a simple script
to make modification of a file used by another Python script easier.
This file is basically a list of regular expressions. What I want to
do is allow the user to select one of these regular expressions to
modify, but I've realized I know of no way to provide a default value
for user input. I could choose to show the regular expression the user
has chosen and simply allow the user to retype it and modify it from
there, but that is time consuming and error prone. Does Python support
a way to do this? If worse comes to worst, is there a way I could
write such code on my own without having to write a C-based module
(I'd like to stick to Python code only since some users will be
running this script on Windows without a C compiler)?


From bwglitch at hotpop.com  Thu Jan 22 16:27:49 2004
From: bwglitch at hotpop.com (BW Glitch)
Date: Thu, 22 Jan 2004 16:27:49 -0500
Subject: Ordered dictionary?
In-Reply-To: <leWPb.231$af7.162835@newshog.newsread.com>
References: <leWPb.231$af7.162835@newshog.newsread.com>
Message-ID: <bupbmc$k004o$1@ID-203388.news.uni-berlin.de>

Leif K-Brooks wrote:

> I need to associate a string (key) with an integer (value). A dictionary 
> would do the job, except for the fact that it must be ordered. I also 
> need to look up the value for a specific key easily, so a list of tuples 
> wouldn't work.

A dictionary could be used. When you need to managed the items in order, 
what you would do is called dict.keys(), followed by a sort.

I don't know if this helps at all...

-- 
Glitch

http://andres980.tripod.com/

"That is the law of the jungle. The hunters and the hunted. Scrap or
be scrapped!"
"Animals hunt to SURVIVE!"
"And what do you think war is about?!"
         -- Dinobot and Tigatron, "The Law of the Jungle"


From theller at python.net  Tue Jan 20 14:32:08 2004
From: theller at python.net (Thomas Heller)
Date: Tue, 20 Jan 2004 20:32:08 +0100
Subject: ctypes 0.6.3 released
References: <r7xzadif.fsf@python.net> <ou1xpuonwv.fsf@andlx-anamika.cisco.com>
Message-ID: <3caamn5z.fsf@python.net>

Ganesan R <rganesan at myrealbox.com> writes:

>>>>>> "Thomas" == Thomas Heller <theller at python.net> writes:
>
>>     It works on Windows, Linux and MacOS X (the latter require that
>>     your machine is supported by libffi).
>
> Hi,
>
> I maintain the ctypes Debian package. The following patch allows ctypes to
> be built on 64-bit archs.
>
> --- ctypes-0.6.3.orig/source/callproc.c
> +++ ctypes-0.6.3/source/callproc.c
> @@ -549,11 +549,11 @@
>  #if (SIZEOF_LONG_LONG == 8 && SIZEOF_LONG == 4)
>  #undef ffi_type_ulong
>  #define ffi_type_ulong ffi_type_uint32
> -#define ffi_type_ulonglong ffi_type_uint64
>  #undef ffi_type_slong
>  #define ffi_type_slong ffi_type_sint32
> -#define ffi_type_slonglong ffi_type_sint64
>  #endif
> +#define ffi_type_ulonglong ffi_type_uint64
> +#define ffi_type_slonglong ffi_type_sint64
>
> Ganesan

Cool, thanks. I've applied this in cvs.

Thomas

PS: Can you post (or send by private email, if it is large, the output
of the test suite: 'python setup.py test' ?


From theller at python.net  Wed Jan  7 05:45:35 2004
From: theller at python.net (Thomas Heller)
Date: Wed, 07 Jan 2004 11:45:35 +0100
Subject: metadocumentation (keyword help)
References: <tyfn091gnk5.fsf@pcepsft001.cern.ch>
	<mailman.144.1073405082.12720.python-list@python.org>
	<3ffb0edf$1@nntp0.pdx.net> <tyfhdz8gn8k.fsf@pcepsft001.cern.ch>
Message-ID: <d69wnik0.fsf@python.net>

Jacek Generowicz <jacek.generowicz at cern.ch> writes:

> sdd <daniels at dsl-only.net> writes:
>
>> Jp Calderone wrote:
>> 
>> > On Tue, Jan 06, 2004 at 03:27:06PM +0100, Jacek Generowicz wrote:
>> >
>> 
>> >>Where can I find concise, clear documentation[*] describing what one has
>> >>to do in order to enable Python's internal help to be able to provide
>> >>descriptions of Python keywords ?
>> >   "Quote them"
>> 
>> >   help('if')
>> 
>> >   Jp
>> 
>> Or simply use help()
>> and interactively enter lines.
>
>
> Yes, but this actually does not work out of the box (on any of the
> GNU/Linux, Mac OS X, and even Windoze installaitions I have tried). You
> get an error message complaining about the absence of HTML
> documentation and setting PYTHONDOCS. So, to rephrase my question ...
>
>
> Where can I find clear instructions on how to install and configure
> the Python documentation which is necessary to make the following
> work:
>
>    >>> help('and')
>
> ?

Download the HTML archive from
<http://www.python.org/doc/current/download.html>, and unpack this in a
temporary directory.  Leave the directory structure intact - in Winzip,
make sure the 'Use Folder Names' checkbox is checked.

This creates a Python-Docs-2.3.3 subdirectory.  Copy everything in this
directory (including subdirectories) into your c:\python23\Doc folder
(normally there is a single Python23.chm file in it), and you're done.

Thomas


From jsbenson at bensonsystems.com  Thu Jan 15 17:43:14 2004
From: jsbenson at bensonsystems.com (John Benson)
Date: Thu, 15 Jan 2004 14:43:14 -0800
Subject: off-topic, but I can't resist the flamebait: best minicomputer?
Message-ID: <0cd901c3dbb8$f61e4470$8d09500a@jsbwxp3>

Like I said, I can't resist the temptation...

Tandem practically invented the commercially useful, networked minicomputer.
Up to 16 loosely-coupled processors with distributed microkernel OS
architecture per system connected via a SAN (System Area Network), RAID 1
(mirrored disk volumes), SSI (Single System Image, with single logon, of
course), multiple-system database commits, shared-nothing fault-tolerance:
you had all this back in the late 70's. You could also add another network
level to harness up to 255 16-processor systems together. This gave Tandems
the linear expandability that allowed their "minicomputer" systems to scale
up to and overtake the IBM big iron. As a matter of fact, it was the Tandem
expandability (since you could have multiple channels per processor, 16
processors per system, 255 systems per Expand network) that provided the I/O
bandwidth to enable the ATM explosion.

Stock exchanges used to melt down automatically when their legacy systems
choked on excessive trading volume. For years, NASDAQ has used Tandems, and
needs to proactively decide when to suspend trading because the Tandems
handle pretty much whatever is thrown at them.

They're fault-tolerant, too. That's why a some of your 911 systems use them,
because some people feel that 911 has to work all the time, like stock
exchanges and ATM networks.

The problem is, Tandems are the unsung heroes of data processing because
they're embedded so deeply in the infrastructure. You place your trade with
a discount broker, not a Tandem. You see a Diebold or perhaps an NCR ATM,
not a Tandem.

Go back to the top and look at the lineup of late 70's Tandem features.
Chances are, you didn't read about them in Byte or wherever until the
eighties or nineties. Fact is, pretty much everybody has been following
Tandem's lead for decades, however much they posture as "industry leaders."

When I started working on Tandems in the late 70's and they were expected to
run weeks, months and years without stopping, I remember reading an article
in which a Unix guy bragged that his system had actually run two or three
weeks without crashing. Even now, in the 2000's, people still periodically
reboot their Unix and NT servers to scare away the memory leak bogeymen,
even if everything appears to be working fine. Anyone advocating that for a
Tandem system even 20 years ago would have been dispatched to the nearest
psychotherapist.

Unix boxes: carried the Multics banner forward, and pioneered lots of
software technology. Macs and PCs: added GUIs to the mix. Tandem: you never
heard about it, because it never broke.





From olivier.marechal at laposte.net  Sat Jan 31 17:01:07 2004
From: olivier.marechal at laposte.net (Olivier)
Date: Sat, 31 Jan 2004 23:01:07 +0100
Subject: wxPython documentation
Message-ID: <401c25a3$0$11357$636a55ce@news.free.fr>

Where could I find a good documentation about wxPython (a documentation
which is not for C++ !!!)

Olivier




From jcarlson at nospam.uci.edu  Fri Jan 23 03:40:59 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Fri, 23 Jan 2004 00:40:59 -0800
Subject: Accessing Microsoft Word from Python
In-Reply-To: <mailman.676.1074841832.12720.python-list@python.org>
References: <mailman.676.1074841832.12720.python-list@python.org>
Message-ID: <buqmqm$f6$1@news.service.uci.edu>

Mickel Gr?nroos wrote:
> Hi!
> 
> I'm fiddling with Python for Windows (normally using Linux) and as a part
> of that I want to try to make a simple word frequency list generator to be
> used in conjunction with Microsoft Word. Does anybody have any good
> pointers on where I can find information about accessing Word-documents
> (or other Microsoft Office applications) from Python? To be more specific,
> I want to be able to:
> 
> - get the text content of the full Word document
> - define a callback in Python that is called every time a user enters a
> character into the text of a Word document
> - get the last two graphical word tokens before the current position of
> the insertion cursor in the text of the Word document.
> 
> Cheers!
> 
> /Mickel

Mickel,

Sounds like something that could be done with VB.  VB will let you 
script anything in Word or Office, but then it requires you to learn the 
horror that is VB.  Perhaps a limited interface is available through 
COM, but I wouldn't bet the farm on it.

  - Josiah


From bignose-hates-spam at and-benfinney-does-too.id.au  Wed Jan 21 21:39:35 2004
From: bignose-hates-spam at and-benfinney-does-too.id.au (Ben Finney)
Date: 22 Jan 2004 13:29:35 +1050
Subject: python said : "1, 2, 3, 6, 7, manbo !"
References: <pan.2004.01.21.20.53.18.750567@address.com>
Message-ID: <slrnc0uf4m.flo.bignose-hates-spam@iris.polar.local>

On Wed, 21 Jan 2004 17:53:19 -0300, - wrote:
> Why 5 does not appear ? (this was the source of a deep bug in a 4000+
> lines networked program...)

Curious:

    >>> a = range(8)
    >>> for b in a:
    ...     if ( b == 4 ):
    ...             a.remove(b)
    ...     print ( b, a )
    ...
    (0, [0, 1, 2, 3, 4, 5, 6, 7])
    (1, [0, 1, 2, 3, 4, 5, 6, 7])
    (2, [0, 1, 2, 3, 4, 5, 6, 7])
    (3, [0, 1, 2, 3, 4, 5, 6, 7])
    (4, [0, 1, 2, 3, 5, 6, 7])
    (6, [0, 1, 2, 3, 5, 6, 7])
    (7, [0, 1, 2, 3, 5, 6, 7])

It seems that, having removed the current item in the list, the index of
the "for" loop hasn't changed.  The next iteration increments that
index, even though the list itself has become shorter.

-- 
 \       "You know I could rent you out as a decoy for duck hunters?"  |
  `\                                                   -- Groucho Marx |
_o__)                                                                  |
Ben Finney <http://bignose.squidly.org/>


From computer.problemen at skynet.be  Sat Jan 10 10:30:51 2004
From: computer.problemen at skynet.be (broebel)
Date: Sat, 10 Jan 2004 16:30:51 +0100
Subject: python newbie
References: <3ffddcfd$0$16662$ba620e4c@news.skynet.be>
	<5unrvv8u1vpske1j464epj4aff0f54k2nf@4ax.com>
	<UilLb.1570$nt4.1692@attbi_s51>
	<gLrLb.5136380$Of.812373@news.easynews.com>
	<3fff1245@usenet01.boi.hp.com>
Message-ID: <400018e8$0$294$ba620e4c@news.skynet.be>

Just like you don't speak dutch, I don't write python (that's a good reason
to learn, isn't it) so I'm not trying out your proposal to see wheather it
works or not.
I kept it aside to check as soon as I understand more of the language. So
thanks any way.
btw is there a special reason why someone should speak dutch to programm in
python.?


"djw" <donald.welch.nospam at hp.com> schreef in bericht
news:3fff1245 at usenet01.boi.hp.com...
> Joe Francia wrote:
>
> > d wrote:
> >> Worked fine for me on Linux... made two suggested changes: 1) use
> >> raw_input(), not input(), 2) check user input for errors. Sorry, I
don't
> >> know how to say "Enter a number between 0 and 500" in whatever language
> >> this is in (German?)
> >>
> >
> > You're a Python user and you don't recognize Dutch?!?!  For shame... ;>)
>
> Well, I was only off by one country - not too bad for someone who took 4
> years of high school Spanish and can hardly speak a word of it.
>
> I was looking at the code that I proposed to the OP, and wondered if this
> wasn't better:
>
> #!/usr/bin/env python
> while 1:
>     bedrag = raw_input ( 'Geef bedrag tussen 0 en 500 eurocent: ' )
>     try:
>         bedrag = int( bedrag )
>         if bedrag < 0 or bedrag > 500:
>             raise ValueError
>     except ValueError:
>         print "Enter a number between 0 and 500" # In DUTCH, of course!
>     else:
>         break
>
> # ... etc.
>
>
> Is this good style, that is, to put multiple items inside a single try:
> except: else: block? Seems more compact and tidy than my first try.
>
> -d
>
>
>




From poyol at hotmail.com  Fri Jan  9 03:36:48 2004
From: poyol at hotmail.com (OPQ)
Date: 9 Jan 2004 00:36:48 -0800
Subject: asynchronous rpc?
References: <JF7Lb.64014$cM1.10554898@twister.nyc.rr.com>
Message-ID: <a334c30e.0401090036.77dbc57f@posting.google.com>

"Maxim Khesin" <maxk at NtOoSuPrAoM.edu> wrote in message news:<JF7Lb.64014$cM1.10554898 at twister.nyc.rr.com>...
> Hi,
> is there a python framework that supports async RPC calls?
> thanks!

try twisted python. 
You may find what your're looking for.


hth,

---OPQ


From and-google at doxdesk.com  Sat Jan 24 18:01:03 2004
From: and-google at doxdesk.com (Andrew Clover)
Date: 24 Jan 2004 15:01:03 -0800
Subject: utf8 encoding problem
References: <20040122103549.GA5620@wiggy.net>	<Pine.LNX.4.44L.0401221640010.31484-100000@ods.pravda.rfn.ru>
	<mailman.643.1074780990.12720.python-list@python.org>
	<buta7q$vtv$06$1@news.t-online.com>
Message-ID: <2c60a528.0401241501.11cab334@posting.google.com>

Martin v. Loewis <martin at v.loewis.de> wrote:

> As Denis explains, it is true. See 17.13.4

Indeed. [Skip: http://www.w3.org/TR/html4/interact/forms.html#h-17.13.4 ]

> To have non-ASCII input, use multipart/form-data:

Quite so, in theory. Of course in reality, no browser today includes a
Content-Type header in the subparts of a multipart/form-data submission,
so there's nowhere to specify an charset here either! argh.

multipart/form-data as implemented in current UAs is just as encoding-unaware
as application/x-www-form-urlencoded, sadly. In practical terms it does not
really matter much which is used.

[...waiting for the glorious day when UTF-8 and UCS-4 are the only acceptable
encodings; and on that day, Shift-JIS will be the first against the wall oh
let me blummin' well tell you my brother...]

-- 
Andrew Clover
mailro:and at doxdesk.com
http://www.doxdesk.com/


From eric.brunel at N0SP4M.com  Mon Jan 12 05:22:39 2004
From: eric.brunel at N0SP4M.com (Eric Brunel)
Date: Mon, 12 Jan 2004 11:22:39 +0100
Subject: Communicating with MSVC++ via COM: how?
References: <btjkb8$som$1@news-reader4.wanadoo.fr>
	<btptls$1n35$1@arachne.labyrinth.net.au>
Message-ID: <btts1t$hie$1@news-reader3.wanadoo.fr>

Mark Hammond wrote:
> Eric Brunel wrote:
> 
>> This script doesn't work: the call to docs.CloseAll fails with the error:
>>
>> Traceback (most recent call last):
>>   File "test.py", line 13, in ?
>>     docs.CloseAll()
>> TypeError: object of type 'int' is not callable
> 
> 
> This is because docs.CloseAll is making the call, and returning an int. 
>  This, docs.CloseAll() is attempting to call that int.

Hi Mark,

Thanks for your answer. We finally figured out this one, but the problem lies a 
bit farther in the script:

bkpts.AddBreakpointAtLine(86)

The method AddBreakpointAtLine takes an *optional* parameter which is the line 
number on which to put the breakpoint. But bkpts.AddBreakpointAtLine actually 
calls the method AddBreakpointAtLine with no parameter, so I just can't figure 
out how to call the method *with* a parameter...

> It looks very much like you have no makepy support for MSVC built.
> 
> Just after the line:
> app = win32com.client.Dispatch('MSDev.Application')
> Try adding:
> app = win32com.client.gencache.EnsureDispatch(app)
> 
> That should force makepy, and everything should start working.

I tried what you suggest, but it didn't work: I get the following error:

 >>> app = win32com.client.gencache.EnsureDispatch(app)
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
   File "H:\Tools\Python\bin\Windows\Python21\win32com\client\gencache.py", line 
423, in EnsureDispatch
     disp = win32com.client.Dispatch(prog_id)
   File "H:\Tools\Python\bin\Windows\Python21\win32com\client\__init__.py", line 
95, in Dispatch
     return __WrapDispatch(dispatch, userName, resultCLSID, typeinfo, 
UnicodeToString, clsctx)
   File "H:\Tools\Python\bin\Windows\Python21\win32com\client\__init__.py", line 
26, in __WrapDispatch
     typeinfo = dispatch.GetTypeInfo()
   File "H:\Tools\Python\bin\Windows\Python21\win32com\client\dynamic.py", line 
438, in __getattr__
     raise AttributeError, "%s.%s" % (self._username_, attr)
AttributeError: MSDev.Application.GetTypeInfo

Trying to force the generation of the support files via an explicit makepy.py 
didn't work either: doing a Dispatch('MsDev.Application') still doesn't get the 
right type. Forcing the type by doing Dispatch('MsDev.Application', 
resultCLSID="{the-class-id}") seems to work, but apparently, the generated class 
knows nothing about the types of its members and simple things as:

app.Visible = 1

fail with a traceback (something like "incorrect type for variable" - sorry for 
the imprecision: we have a French Windows, so the message I get is in 
French...). Getting an attribute like app.Debugger seems to work, but printing 
it says:
<COMObject Debugger>
so the object is a dynamic one, and also knows nothing about its type.

Is there any solution to our problems?

TIA
-- 
- Eric Brunel <eric dot brunel at pragmadev dot com> -
PragmaDev : Real Time Software Development Tools - http://www.pragmadev.com



From root at mail.artnet.com.pl  Tue Jan 27 10:20:55 2004
From: root at mail.artnet.com.pl (root at mail.artnet.com.pl)
Date: Tue, 27 Jan 2004 16:20:55 +0100
Subject: Uwaga probowales wyslac wiadomosc ktora zawierala virusa 
Message-ID: <200401271520.i0RFKt0S000511@mail.artnet.com.pl>

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======================================
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From ep at epoz.org  Mon Jan 12 16:21:21 2004
From: ep at epoz.org (Etienne Posthumus)
Date: Mon, 12 Jan 2004 22:21:21 +0100
Subject: Anyone else using Python OpenSSL Wrappers?
	(http://sourceforge.net/projects/pow/)
Message-ID: <44E8A0EE-4545-11D8-BA82-0003935458F6@epoz.org>

I have been considering the various SSL/crypto libraries for Python, 
and they all have their plus and minus points. The main sticking point 
has been to have BOTH X509 file support and access to some crypto 
operations for signing/hashing.

The only one which does both (please correct me if this is a 
misconception on my part) is http://sourceforge.net/projects/pow/ but I 
can find very few references to it, or projects that use it via Google.

Does anyone use it in their projects, or have any experiences to share? 
So far have tested reading some basic certificates and signing some 
small bits of data, and it looks pretty good.

All comments welcome.


Etienne Posthumus
Amsterdam, Nederland




From exarkun at intarweb.us  Mon Jan 19 14:05:08 2004
From: exarkun at intarweb.us (Jp Calderone)
Date: Mon, 19 Jan 2004 14:05:08 -0500
Subject: A lazy-committing database object with curry?
In-Reply-To: <b6562547.0401190845.6832a797@posting.google.com>
References: <b6562547.0401190845.6832a797@posting.google.com>
Message-ID: <20040119190508.GA3993@intarweb.us>

On Mon, Jan 19, 2004 at 08:45:45AM -0800, Tim Lesher wrote:
> I'm writing a database helper class that represents records in a SQL
> database as objects.  I want to be able to instantiate the objects
> (from the database), play with their values locally, then lazily
> commit the changes all at once (via an explicit commit call).  Other
> than the call to Commit(), I don't want clients of this class to have
> to think about the fact that there's a database behind it all--there are
> some interesting and non-obvious dependencies on the particular values 
> that are committed together, and I want to hide that in the Commit() call.

  Sounds familiar...

> 
> I'm going to have a number of these, so I wanted to come up with a
> solution that's short on glue code and can easily be aggregated into
> all the classes that represent record types.  This is what I've come
> up with:
> 
> # Simple currying class, no kwargs
> class curry:
>     def __init__(self, fun, *args):
>         self.fun = fun
>         self.pending = args[:]
>     def __call__(self, *args):
>         return self.fun(*(self.pending + args))
> 

  You don't need to copy args, Python has done that for you already.

>         
> # Simple table:  two columns, "title" and "description"
> class SomeRecordType(object):
>     def __init__(self, title, description):
>         self.__modifications = {}
> 
>         # Avoid triggering propset on init
>         self.__dict__['title'] = title
>         self.__dict__['description'] = description
> 

  Are you sure?  How will the initial values be committed to the database,
if you don't catch them in the modifications dict?  I guess you might be
handling initial values somewhere else, in code you didn't post...

>     def __getValue(name, self):
>         try:
>             return self.__modifications[name]
>         except KeyError:
>             return self.__dict__[name]
> 
>     def __setValue(name, self, newValue):
>         self.modifications[name] = newValue
> 
>     name = property(curry(__getValue, 'title'),
>                     curry(__setValue, 'title'))
>     description = property(curry(__getValue, 'description'),
> 			   curry(__setValue, 'description'))

  Nift.  You surely don't use the full capabilities of currying here, but
you are incurring a double function call overhead on every setattr now. 
Here's another way to do it:

      def makeModificationFunctions(name):
          def modget(self, value):
              try:
                  return self.__modifications[name]
              except KeyError:
                  return self.__dict__[name]
          def modset(self, value):
              self.__modifications[name] = value
          return modget, modset
      title = property(*makeModificationFunctions('title'))
      description = property(*makeModificationFunctions('description'))

  Of course, you can go one step better and use a metaclass:

      class MetaRecordType(type):
          def __new__(metaclass, name, bases, ns):
              for k, v in ns.items():
                  if v is makeModificationFunctions
                      ns[k] = property(*v(k))
              return type.__new__(metaclass, name, bases, ns)

  and now in the class definition simply say:

      __metaclass__ = MetaRecordType
      
      title = makeModificationFunctions
      description = makeModificationFunctions

> 
>     def Commit(self):
>         if self.modifications != {}:

   This can be just "if self.__modifications:"


>             # - snip - Do database commit and clear modifications
>             self.__dict__.update(self.modifications)
>             self.modifications = {}
> 
> So I can do this:
> 
> foo = myDb.LookupTitleRecord('some title')
> print foo.description    # 'foo'
> foo.description = 'bar'  # not updated in the DB yet
> print foo.description    # 'bar'
> foo.Commit()             # now updated in the DB
> 
> 
> Are there any pitfalls to doing this?  Am I being dazzled by the shiny
> new toy that is currying?  Is there another simple solution, or a
> refinement of this one, that I'm not seeing?
> 

  One possible problem is failed commits.  If you're doing commits
transactionally, and the transaction fails, your in memory objects will
retain their now-inconsistent values while the database remains unupdated. 
If you're not using transactions.. well that's a whole other problem :)

  You may want to look at xsdb and atop.  Neither uses SQL, but both have
developed pretty heavily on some of the ideas you're tinkering around with.

  Jp



From jjl at pobox.com  Wed Jan 14 18:35:17 2004
From: jjl at pobox.com (John J. Lee)
Date: 14 Jan 2004 23:35:17 +0000
Subject: Does anyone else not find the fun in programming...?
References: <d232c5e.0401130823.27fd26ff@posting.google.com>
	<a4c800pm8el33j9vb5jbc14e9tfs1bfdpk@4ax.com>
Message-ID: <871xq2t87e.fsf@pobox.com>

Arthur <ajsiegel at optonline.com> writes:
[...]
> >Do I need help ?
> 
> Since, for me,  it's  most particularly fun when I *should* be doing
> something else:  
> 
> it would seem, I do.

:-))

it's-only-work-when-they-make-you-do-it-ly y'rs,


John


From cookedm+news at physics.mcmaster.ca  Thu Jan 29 17:21:19 2004
From: cookedm+news at physics.mcmaster.ca (David M. Cooke)
Date: Thu, 29 Jan 2004 17:21:19 -0500
Subject: Python vs. Io
References: <711c7390.0401291301.3f95794@posting.google.com>
Message-ID: <qnkfzdyieg0.fsf@arbutus.physics.mcmaster.ca>

At some point, LittleDanEhren at yahoo.com (Daniel Ehrenberg) wrote:

> Io (www.iolanguage.com) is a new programming language that's purely
> object-oriented (but with prototypes), has a powerful concurrency
> mechanism via actors, and uses an extremely  flexible syntax because
> all code is a modifiable message tree. Like Python, it is dynamically
> typed, has a very clean syntax, produces short code, and is
> excruciatingly slow (on the same level as eachother). Io has a unique
> syntax combining Lisp's idea of functions for flow control with
> traditional function syntax and smalltalk-like syntax to get slots of
> objects. Io has no keywords and everything, even multiple lines of
> code, can be used as an expression. Even as a beginner to Io, I was
> able to write something in just 43 lines to let you do something like
> this (and more) in Io:
>
> each((key, value) in map(x=1, y=2, z=3),
>     write(key, ": ", value, "\n")
> )
>
> Neither the each function nor the map function were built in (Io has
> other mechanisms for that kind of thing, but they are less efficient).
> Can anyone show me how to so much as alias "for" to "each" in Python
> or allow block syntax at all without hacking the C source code?

Hey, if I wanted to to, I could add functions and all that that would
make Python look like Lisp, or IO, or whatever.

But, why? If I wanted to write Lisp or Io, I'd use those.

Your example I'd write in Python as

for key, value in dict(x=1, y=2, z=3):
    print '%s: %s\n" % (key, value)

I didn't have to write 43 lines of support code, and it's also two
lines. I don't think "this isn't builtin" is a selling point -- you
need a critical mass of builtins to make a language useful.

> Io doesn't use __methods_with_this_annoying_syntax__ because nothing
> is supposed to be for internal use only and there are only about three
> functions that would cause a problem if overridden.

> For embedding, Io doesn't have to use Py_ALL_CAPS, instead it just
> uses IoCamelCase, which looks much better. Interfaces to C are much
> more object oriented.

Ok, these two points are window-dressing: minor spelling and
punctuation issues (which seems to be what most language wars are about).

Heck, use boost::python for C++ interfaces; those function names are
even shorter. Or use pyrex to generate wrappers, writing them in a
Pythonesque language.

> Many users of Io (myself included) have switched over from Python for
> these reasons.
>
> I guess there are still the obvious advantages of Python over Io,
> including
> *large community
> *more bindings to stuff

Yep. That's a *big* difference, I'd say.

> *strict coding conventions
> *inflexible so everything is the same

Can you elaborate a bit on why Python is inflexible? I find Python to
be extremely flexible.

> *no need to close blocks
> But unless there are other problems, the first two go away soon
> (considering that Io was first created just two years ago). The last
> three are somewhat trivial and may even be to Io's advantage.

Python is 14 years old, and it's still working on global domination;
Io's got some catching up to do :-)

-- 
|>|\/|<
/--------------------------------------------------------------------------\
|David M. Cooke
|cookedm(at)physics(dot)mcmaster(dot)ca


From shalabh at cafepy.com  Tue Jan 13 01:39:13 2004
From: shalabh at cafepy.com (Shalabh Chaturvedi)
Date: Mon, 12 Jan 2004 22:39:13 -0800
Subject: Operator overloading and __getattr__
In-Reply-To: <JzEGb.6419$VW.246230@news3.tin.it>
References: <slrnbue5dp.72h.sam@h41n2fls31o839.telia.com>	<vugquo5mkffj96@news.supernews.com>
	<JzEGb.6419$VW.246230@news3.tin.it>
Message-ID: <bu03ni$rs0$1@sea.gmane.org>

Alex Martelli wrote:
> 
> It's true that (with newtype classes) special methods
> can't be usefully "installed in the instance", but it's
> not true that they can't usefully be "installed after
> the class is defined" (as long as they ARE installed in
> the _class_, not in the _instance_).
> 
> For example:
> 
> 
>>>>class X(object): pass
> 
> ...
> 
>>>>x = X()
>>>>print x
> 
> <__main__.X object at 0x402dea8c>
> 
>>>>x.__str__ = lambda: "I am an X"
>>>>
>>>>print x
> 
> <__main__.X object at 0x402dea8c>
> 
>>>>X.__str__ = lambda self: "I am an X"
>>>>print x
> 
> I am an X
> 
> 
> Here we see that the first attempt, "installing in
> the instance" in your terminology, was inoperative; but
> the second one, "installing in the class" even though
> well after the class was defined was perfectly operative
> (on existing instances of the class, too -- of course it
> also works just fine on any further new instance you may
> create thereafter).
> 

<snip>

> If you want to add what amounts to a "per-instance
> special method" you have, in practice, to make the
> instance's class unique.  There are several ways to
> do that, including on-the-fly and (better if you do
> know all instances of a certain class will need such
> treatment) in a __new__ method on the common baseclass.

<snip>

Another option might be to use a descriptor on the class that looks up 
an instance attribute. A simplified example:

 >>> class X(object): pass
...
 >>> x = X()
 >>>
 >>> class iprop(object):
...     def __init__(self, ipropname):
...             self.ipropname = ipropname
...     def __get__(self, ob, cls):
...             if ob is not None and ob.__dict__.has_key(self.ipropname):
...                     return ob.__dict__[self.ipropname]
...
 >>> X.__str__ = iprop('__istr__')
 >>>
 >>> x.__istr__ = lambda: 'this is the instance x'
 >>>
 >>> print x
this is the instance x
 >>>

Any downside to this one?

--
Shalabh





From gerrit at nl.linux.org  Tue Jan  6 14:52:40 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Tue, 6 Jan 2004 20:52:40 +0100
Subject: PRE-PEP: new Path class
In-Reply-To: <vvjt77546230f3@news.supernews.com>
References: <vvivefh35qjv9a@news.supernews.com>
	<mailman.118.1073338659.12720.python-list@python.org>
	<vvjt77546230f3@news.supernews.com>
Message-ID: <20040106195240.GE4581@nl.linux.org>

[PEP]
> > >7) Should the various gettime methods return Datetime
> > >objects.

[John Roth]
> > >Of course.

I was hasitating, because of the backwards-compability, but this should
not be a reason not to make things better, of course (TV isn't backward
compatible with radio either ;)

[Mike C. Fletcher]
> > What are we doing for Python 2.2 then?  I agree with the principle, but
> > we should likely have a fallback when datetime isn't available.

[John Roth]
> Do we care? If this is going into Python, it will be in 2.4 at the
> earliest, with a possible addon to a late 2.3 release. I don't see
> it going into 2.2 at all, although a backwards version would
> be nice.

If the PEP will be finished and may be accepted, I think that the
roadmap of introducing the feature will be like sets: In 2.4, it's a
library, and if it's succesful/popular, it may become a builtin in 2.5.

> > Path commonprefix are different operations from str commonprefix.  Paths
> > should only accept entire path-segments (names) as being equal, while
> > strings should accept any set of characters:
> >
> >     '/this/that/those/them'
> >     '/this/thatly/those/them'
> >
> > should see '/this/' as the commonprefix for the paths, not '/this/that'.

In should... it doesn't seem to do so currently.

> Good point if you're thinking of heterogenous collections. If you're
> thinking (as I am) that an object can represent a directory, then it
> seems like a singularly useless method.

The only place where I can think of a use is a tarfile/zipfile. For a
path, it means nothing. It can be useful but since it needs multiple
paths, it can't be a method. The only thing I can think of is a
classmethod, a constructor, but I don't really like the idea much.

> > >13) chdir, chmod, etc?
> > >
> > >No. This has nothing to do with pathname.

Is p.chdir() better or worse than chdir(p)?
The latter reads better, but that may be because we're used to it.
But on the other hand, that may be a convincing argument just as well :)

> > chdir should accept a path, otherwise doesn't seem like it
> > should be a method.
> 
> If the path object describes a directory, then I'd see
> a .chdir() method as useful. Otherwise, it belongs
> somewhere else, although I don't have a clue where
> at the moment.

I think there should be no distinction between files and directories,
and that p.chdir() for a non-directory should raise the same exception
as currently (OSError Errno 20).

yours,
Gerrit.

-- 
27. If a chieftain or man be caught in the misfortune of the king
(captured in battle), and if his fields and garden be given to another and
he take possession, if he return and reaches his place, his field and
garden shall be returned to him, he shall take it over again.
          -- 1780 BC, Hammurabi, Code of Law
-- 
Asperger's Syndrome - a personal approach:
	http://people.nl.linux.org/~gerrit/english/



From slzatz at hotmail.com  Mon Jan 19 08:47:35 2004
From: slzatz at hotmail.com (Steve Zatz)
Date: 19 Jan 2004 05:47:35 -0800
Subject: Simple (?) Regular Expression Question
References: <mailman.486.1074470465.12720.python-list@python.org>
Message-ID: <6747bc9d.0401190547.1d3b6b@posting.google.com>

Thanks to both of you for your help.


From r.s at ZZmindspring.com  Thu Jan  1 18:22:45 2004
From: r.s at ZZmindspring.com (r.e.s.)
Date: Thu, 01 Jan 2004 23:22:45 GMT
Subject: PythonWin problems
References: <z5GIb.10324$Vl6.2031681@news20.bellglobal.com>
Message-ID: <9Z1Jb.15438$lo3.12939@newsread2.news.pas.earthlink.net>

"Colin J. Williams" <cjw at sympatico.ca> wrote ...
> PythonWin has been my favourite IDE for quite a while.
> 
> When one right clicks on a .py file in the Windows Explorer, among the 
> options are Open and Edit.  The former is the default and executes 
> Python, with the selected script.  The latter activates the PythonWin 
> editor, with the selected script.
> 
> Since, most frequently, I wish to edit the script, or execute it with 
> the debugger, I tried changing the default to Edit, using the Edit File 
> Type menu.

FWIW ...

I'm not sure what you mean by "Edit File Type menu".
Using WinXP Pro, in Windows Explorer I went to 
Tools/Folder Options/File Types
selected PY, clicked Advanced, and set the default to Edit.
Now double-clicking a .py file brings it up in PythonWin,
and I've experienced neither of the problems that you report below.

> 
> Unfortunately, this leads to a couple of problems:
> 
> 1. Any activity becomes horrendously slow, and
> 2. The following message appears:
>     LoadBarState failed - LoadBarState failed (with win32 exception!)
> [Dbg]>>>



From bart_nessux at hotmail.com  Thu Jan  8 18:57:27 2004
From: bart_nessux at hotmail.com (Bart Nessux)
Date: Thu, 08 Jan 2004 18:57:27 -0500
Subject: count objects in a list and random numb gen
References: <btkodt$hrg$1@solaris.cc.vt.edu>
	<7xekuaxbj1.fsf@ruckus.brouhaha.com>
Message-ID: <3FFDEE67.4070309@hotmail.com>

Paul Rubin wrote:
> Bart Nessux <bart_nessux at hotmail.com> writes:
> 
>>New to Python... trying to figure out how to count the objects in a
>>list and then map the count to the objects or convert the list to a
>>dict... I think the latter would be better as I need a number
>>associated with each entry. Any pointers?
> 
> 
> I'm sorry but I just can't understand the above description

I want to count the objects in a list. len works well for this. Once I 
have a count, I want to map that count to the items in the list like this:

entry one is 1
entry two is 2
entry three is 3
...

This is why I thought a dictionary may be better suited for this.

> 
> 
>>Also, does this bit of code look to be truely random?
>>
>>def random_number_gen():
>>    winner = []	
>>    winner.append(random.sample(xrange(100000), 1))	
>>    print winner	
> 
> 
> If you want to choose one random winner out of a list, you can say
> print random.randint(100000).  
> 
> Note that Python's random function doesn't try to be really seriously
> random, but only to have reasonable statistical properties.  If you
> need random numbers that can stand up to an adversary (e.g. you're
> using it in an online game where the winners get substantial prizes),
> you shouldn't generate them with the random module.

I think random.sample is better than you think:

sample(  population, k)

Returns a new list containing elements from the population while leaving 
the original population unchanged. The resulting list is in selection 
order so that all sub-slices will also be *valid random samples*. This 
allows raffle winners (the sample) to be partitioned into grand prize 
and second place winners (the subslices).





From usenet_spam at janc.invalid  Thu Jan  8 18:56:09 2004
From: usenet_spam at janc.invalid (JanC)
Date: Thu, 08 Jan 2004 23:56:09 GMT
Subject: FYI: Python in Pricelessware 2004 list
Message-ID: <Xns946B98529C81JanC@213.119.4.35>

Python was voted into the Pricelessware 2004 list in the "Programming" 
category.  This list reflects what the participants of alt.comp.freeware 
consider their favourite freeware programs.

The new Pricelessware 2004 list is online since yesterday:
<http://www.pricelessware.org/2004/about2004PL.htm>

-- 
JanC

"Be strict when sending and tolerant when receiving."
RFC 1958 - Architectural Principles of the Internet - section 3.9


From simonb at NOTTHISBIT.webone.com.au  Tue Jan 20 20:33:06 2004
From: simonb at NOTTHISBIT.webone.com.au (Simon Burton)
Date: Wed, 21 Jan 2004 12:33:06 +1100
Subject: Pyrex without Python (was Re: calling Pyrex results from C)
References: <mailman.561.1074646604.12720.python-list@python.org>
Message-ID: <pan.2004.01.21.01.32.53.48563@NOTTHISBIT.webone.com.au>

On Tue, 20 Jan 2004 18:57:49 -0600, Jeff Epler wrote:

> Perhaps I should take the advice given elsewhere to ask on a pyrex mailing
> list, but I thought I'd try here first.
> 
> As I mentioned in another thread a few weeks ago, a current hobby is
> writing code for small embedded processors, where "small" means 1k-4k
> instructions and 128-1k bytes data.  C is a fine language for this as long
> as you don't use FP arithmetic or much of the standard library.
> 
> I wish I could write my code in Pyrex, of course keeping to 'int8_t' and
> 'int16_t' as only basic data types, but it inevitably makes Python API
> calls.

Really? Can you post an example of what code you would write?
I also use pyrex/python etc. and write code for Atmel AVRs, and 
fail to see how pyrex code (without the python API) would be easier than
just c.

Simon.

-- 
Simon Burton, B.Sc.
Licensed PO Box 8066
ANU Canberra 2601
Australia
Ph. 61 02 6249 6940
http://arrowtheory.com 



From candiazoo at comcast.net  Fri Jan  2 14:23:48 2004
From: candiazoo at comcast.net (Zoo Keeper)
Date: Fri, 02 Jan 2004 19:23:48 GMT
Subject: Problem building on BeOS...
References: <NLhJb.31440$I07.78784@attbi_s53>
	<bt4a9t$13e4$1@ulysses.news.tiscali.de>
	<f8iJb.42537$xX.145398@attbi_s02>
	<donn-8FEA6E.10503502012004@nntp1.u.washington.edu>
Message-ID: <8zjJb.725764$Tr4.1845399@attbi_s03>

Is there a way to strip'em?  I see "cr nl".  :/

Mike

In message <donn-8FEA6E.10503502012004 at nntp1.u.washington.edu>, Donn Cave 
wrote:
> In article <f8iJb.42537$xX.145398 at attbi_s02>,
>  Zoo Keeper <candiazoo at comcast.net> wrote:
> 
> > Thanks for the reply!  I checked in my editor (pe) and it indicates just a
> > carriage return at the end of the line (visibles and tab stops on).
> 
> I've never used pe.  I would hope it doesn't do that, but to say
> for sure I'd run the file through "od".  Like,
>   $ fgrep '\' arrayobject.h | od -a
> 
> If you see anything between "\" and "nl", that's your problem.
> 
>    Donn Cave, donn at u.washington.edu




From peter at engcorp.com  Fri Jan  9 09:09:17 2004
From: peter at engcorp.com (Peter Hansen)
Date: Fri, 09 Jan 2004 09:09:17 -0500
Subject: What psyco is goot at [Was: Rookie Speaks]
References: <mailman.198.1073602275.12720.python-list@python.org>
	<pan.2004.01.09.00.14.30.629722@yahoo.com>
Message-ID: <3FFEB60D.A57578E@engcorp.com>

Samuel Walters wrote:
> 
> I've heard of a tool, I believe it's called HotSpot, that will help you
> figure out which lines of code, not functions, are the most expensive for
> you.  You could then see if wrapping those lines in a function and binding
> it with psyco would give you a gain in performance.  You might look into
> it.  I haven't researched it, know nothing about it, and it's pretty low
> on my to-do list ATM, but it might help you with your needs.

Actually, "Hotshot" is the new profiler that was added in 2.2::

  HotShot, a new profiler implemented using a C-based callback, has
  been added.  This substantially reduces the overhead of profiling,
  but it is still quite preliminary.  Support modules and
  documentation will be added in upcoming releases (before 2.2 final).

See also http://www.python.org/doc/current/lib/module-hotshot.html .

-Peter


From no at spam.invalid  Sat Jan 24 14:27:55 2004
From: no at spam.invalid (Russell E. Owen)
Date: Sat, 24 Jan 2004 11:27:55 -0800
Subject: Tkinter Base Window
References: <401257c4$0$26116$afc38c87@news.optusnet.com.au>
Message-ID: <buugvu$egm$1@nntp6.u.washington.edu>

In article <401257c4$0$26116$afc38c87 at news.optusnet.com.au>,
 Peter Moscatt <pgmoscatt at optushome.com.au> wrote:

>Ok....  I am pretty new to Python (as you may have gathered from previous
>posts).  So now it time for another one of my ridiculous questions....  :-)
>
>When using 'Tkinter', what is used as the base window to work from, meaning
>what widget do I use to place all other widgets onto to create a custom
>dialog ?

You'll want to create a new Toplevel (the term Tkinter uses for the 
thing many of us think of as a window). If you want the window to be 
modal you'll have to do a few extra things.

Tkinter already includes a lot of modules for creating dialogs. Find the 
file Tkinter.py (in lib-tk in with your other python libraries) and look 
at some of its fellows such as tkFileDialog.py, tkSimpleDialog.py and a 
host of others with dialog in their names. Read the source code to see 
how to use it (or import each package and type help(package_name)). You 
may find exactly what you want, and if not, at least you'll see some 
examples.

-- Russell


From surffirst at yahoo.com  Fri Jan 30 05:45:22 2004
From: surffirst at yahoo.com (Leo Yee)
Date: Fri, 30 Jan 2004 18:45:22 +0800
Subject: pyc file problem
Message-ID: <bvdck3$9l1$1@sea.gmane.org>

Hi,

I am programming a online game program. I use python as my game's script
language. To avoid hacking and cheating I don't want anyone to read the
python script file and find useful information for hacking the game.

I know I can compile the '.py' file to '.pyc' file but I found that a normal
text editor can read a lot of information from the '.pyc' file even those
comments I wrote.

My question is if there is a methond to compile the '.py' file into a state
that there are no human readable strings.

Thanks in advance.

Leo Yee






From No.Spam.mc at No.Spam.mclaveau.No.Spam.com  Wed Jan 28 02:15:44 2004
From: No.Spam.mc at No.Spam.mclaveau.No.Spam.com (Michel Claveau/Hamster)
Date: Wed, 28 Jan 2004 08:15:44 +0100
Subject: python in dreamweaver
References: <d99e1341.0401271818.625d5ef2@posting.google.com>
Message-ID: <bv86nc$rto$2@news-reader4.wanadoo.fr>

Hi !

Yes !

I do.

@+
--
Michel Claveau







From r_olson at sandiego.edu  Thu Jan  8 22:05:04 2004
From: r_olson at sandiego.edu (Rick Olson)
Date: 8 Jan 2004 19:05:04 -0800
Subject: Newbie has problem changing C char strings with Python/SWIG
Message-ID: <a5d3ff08.0401081905.6ae8c570@posting.google.com>

I've tried posting this on the SWIG listserve, but traffic has been
slow there and I haven't had a reply.  If this isn't the correct
forum, please suggest another.  Thanks.

I'm trying to use python as the interface for an existing program
written in C.  I've gotten many things to work including using cvar to
assign values to long and double variables in the C module from
python. I'm having trouble using it to assign strings.  I've reduced
the problem to the following .c and .i files, and a sample idlefork
session:
--------------------
example.c
char *eval_name;
void define_globals()
{ eval_name = "Bob";
}
--------------------
example.i
%module example
%{
%}
extern void define_globals();
extern char *eval_name;
---------------------
IDLEfork 0.9b1      
>>> import example
>>> example.define_globals()
>>> example.cvar.eval_name
'Bob'
>>> example.cvar.eval_name='Tony'
>>> ==== RESTART ================================

I seem to be able to use Python invoke the C function that assigns
"Bob" to the variable eval_name, but when I try to assign a new name
('Tony') the idlefork shell restarts.

I've combed the docs and the archives at swig.org, but I didn't see
this  ddressed anywhere.  I strongly suspect that I looked right at
it, but didn't
recognize it at the time.  This leads to 2 questions:

1) How do I perofrm the desired assignment?
2) Where was the answer in the docs so I can look at it and try to
understand how I overlooked it.

Thanks in advance--
Rick Olson


From drconrad at metaplay.com.au  Fri Jan 30 00:39:02 2004
From: drconrad at metaplay.com.au (SimonW)
Date: Fri, 30 Jan 2004 13:39:02 +0800
Subject: RESTful Python
In-Reply-To: <20040130044446.GA30604@mail.theserver.ath.cx>
Message-ID: <001501c3e6f3$5e619240$0000fea9@simonxp>

I am building a application using XUL, and am looking at using the REST
approach rather than XML-RPC for the back end.

I've setup a mod-python handler which can handle PUT, DELETE, POST and
GET requests, but after that I seem to get lost. I guess this is more a
REST question than a python question, however I ultimately would like to
implement the entire backend in Python. 

I want to be able to address sections of an XML document using an URI,
but I am not sure how to implement this. I've seen this done in Python
before, however I cannot find the site again, and cannot recall the
correct google incantations to re-discover it.

Can anyone point me to some REST style implementations in Python?


Regards,

Simon R. Wittber
http://www.metaplay.com.au
Perth, Western Australia.




From elainejackson7355 at home.com  Fri Jan 30 00:48:15 2004
From: elainejackson7355 at home.com (Elaine Jackson)
Date: Fri, 30 Jan 2004 05:48:15 GMT
Subject: conditional expression sought
References: <pRbSb.330334$ts4.37644@pd7tw3no>
	<866j101bbuuhtpan29eop9o4mk1mt7nckn@4ax.com>
Message-ID: <zemSb.334212$X%5.281225@pd7tw2no>

This is a good idea. Thanks for pointing it out.

"Dave K" <dk123456789 at REMOVEhotmail.com> wrote in message
news:866j101bbuuhtpan29eop9o4mk1mt7nckn at 4ax.com...
| On Thu, 29 Jan 2004 17:58:45 GMT in comp.lang.python, "Elaine Jackson"
| <elainejackson7355 at home.com> wrote:
|
| >If bool(B_i)==True for 1<=i<=n and j is the smallest i with bool(A_j)==True,
| >then the evaluation of (A_1 and B_1) or ... or (A_n and B_n) returns B_j
without
| >evaluating any other B_i. This is such a useful mode of expression that I
would
| >like to be able to use something similar even when there is an i with
| >bool(B_i)==False. The only thing I can think of by myself is ( (A_1 and
[B_1])
| >or ... or (A_n and [B_n]) )[0], and I can't be satisfied with that for
obvious
| >reasons. Does anybody know a good way to express this? Any help will be mucho
| >appreciado.
| >
| >Peace
| >
|
| I'm not sure if this is what you're looking for, but for i > a very
| small number, the zip function seems more appropriate:
|
| >>> def get_B_i(A, B):
|     for a, b in zip(A, B):
|     if a: return b
|     return A[-1]
| >>> print get_B_i([False, False, True, False], [0, 1, 2, 3])
| 2
| >>> print get_B_i([False, False, False, False], [0, 1, 2, 3])
| False
|
| This has exactly the same effect provided that A and B are the same
| length, otherwise the return value by failure should be adjusted to
| whatever suits your purpose.
|
| If you really want to write a conditional expression out in full, I
| can't think of anything non-clumsy that would work for all possible
| values of B_i, so unfortunately can't help you there.
|
| Dave
|
|




From aaron at reportlab.com  Fri Jan  9 12:03:42 2004
From: aaron at reportlab.com (Aaron Watters)
Date: 9 Jan 2004 09:03:42 -0800
Subject: twisted request
References: <9a6d7d9d.0312230829.29b014fa@posting.google.com>
	<mailman.83.1072204153.684.python-list@python.org>
Message-ID: <9a6d7d9d.0401090903.72a0c42d@posting.google.com>

Jp Calderone <exarkun at intarweb.us> wrote in message news:<mailman.83.1072204153.684.python-list at python.org>...
> On Tue, Dec 23, 2003 at 08:29:39AM -0800, Aaron Watters wrote:
> > I have a "chat" protocol module called "Hollerith" which
> > is appropriate for use with threads or stackless, but is not
> > ready for "event loop" style programming.  Can someone show
> > me how to implement it (and use it) using Twisted?
> > 
> > http://cvs.sourceforge.net/viewcvs.py/*checkout*/xsdb/xsdb/xsdb/Hollerith.py?content-type=text%2Fplain&rev=1.1
> > 
> > Of course the twisted version should never block, please.
> > 
> > Thanks in advance,  -- Aaron Watters
> > 
> 
>   Twisted includes a netstring implementation and an int32 string
> implementation, both of which are conceptually very similar to the
> underlying function of Hollerith.  Adapting either should be a simple task.

Yes.  It should be.  Is it?  That was my question. :)  -- Aaron Watters

===
THANK YOU FOR NOT SMIRKING


From usenet at -OBFUSCATION-joefrancia.com  Wed Jan 14 15:03:09 2004
From: usenet at -OBFUSCATION-joefrancia.com (Joe Francia)
Date: Wed, 14 Jan 2004 20:03:09 GMT
Subject: wxPython worries
In-Reply-To: <mailman.352.1074092092.12720.python-list@python.org>
References: <mailman.352.1074092092.12720.python-list@python.org>
Message-ID: <1ghNb.5638242$Of.891164@news.easynews.com>

James Goldwater wrote:
> I'm starting a new hopfully-commercial project soon, and I face a 
> dilemma about whether Python with wxPython would be appropriate.
> 
> The project has 3 main areas:
> 
> a) manipulation of lists and trees, using..
> b) a hopefully dead-sexy gui, all in order to...
> c) eventually pump out certain bits of the datastructure over the 
> network in semi-realtime (< 10ms accuracy or so).
> 
> The target is Win32 for now (98 - XP). Now, if it were up to me, I'd use 
> Delphi - it's what I know best.  But I'm working with a less experienced 
> developer with whom I have no languages in common.  He's keen to get 
> started on C#, I've toyed with C# and though it looks easy, I don't see 
> any major gains over what I already know.
> 
> I've read a lot about python and done some mini-stuff in it, and been 
> impressed with it's ease and conciseness.  What worries me is wxPython: 
> looking at the demo code, it's quite verbose and 'bitty'.  I'm also 
> unclear as to how easy custom controls are to build.
> 
> Am I just being confused by my newbie-ness, or are my initial concerns 
> justified?  What's anybody else's experiences with gui programming in 
> wxPython like vs a RAD like Delphi or .NET?
> 
> Thanks,
> 
> James.
> 

I share your concerns with wxPython - it's a good, powerful toolkit, but 
it lacks consistent and clear documentation, and a decent screen painter 
(wxGlade probably is the most complete).

If you have the budget (USD 399 per developer), you may want look at 
BlackAdder from The Kompany.  It uses the PyQt bindings for the Qt 
toolkit, which I find to be a bit better than wxPython/wxWindows, a bit 
more polished and consistent. The package includes the BlackAdder 
editor, the QtDesigner, PyQt docs and a license to redistribute the PyQt 
libraries for win32 (which is really what you're paying for - most of 
this is available for free on GPL'ed systems).

Another option is to extend/embed Python with Delphi; specifically, use 
Delphi for the GUI, and Python for the logic.  There's some Delphi 
bindings and documentation here:

http://membres.lycos.fr/marat/delphi/python.htm
http://www.atug.com/andypatterns/pythonDelphiTalk.htm



From jsbenson at bensonsystems.com  Tue Jan 13 17:21:46 2004
From: jsbenson at bensonsystems.com (John Benson)
Date: Tue, 13 Jan 2004 14:21:46 -0800
Subject: I come not to bury C++, but to praise it...
Message-ID: <006a01c3da23$a1f69c30$890a500a@jsbwxp3>

I got into Python because I took one look at C++ and saw all the handwaving
in the introductory O'Reilly book to the effect that "everything looks sweet
now, but wait until these snazzy little features interact..." and then
started casting around for another road to OOP. I happened upon Python, and
continue to use Python.

I think that the already-posted comments seeking to appreciate the
historical origin and motivations of C++ are essential to understanding it's
applicability in the present.

C++ started as a quintessentially Unix-like exercise in software
engineering: add functionality by leveraging existing software components to
the max. Another level of preprocessor (Cfront) was added to the compiler
tool chain and Bingo! you had a new language. The advantage was quick
time-to-implement. A big disadvantage was that you had to grok C to debug
C++. Later compilers took C++ direct to object, but the C, non-OOP heritage
persisted in the new language: you had to master pointers and references to
really do C++. Later languages simplified the situation by dumping pointers.

I think that C++ was a great exercise, but software engineering has
advanced. Why not take advantage of the latest packaging of OOP and enjoy
the smoother ride? Pick Java, or Python or whatever pleases you. I'm happy
using C for projects that fit it, and Python for more ambitions OOP stuff.
C++ was a great way to move OOP forward, but now it looks more like a
transitional form than a best-of-breed. Sic transit gloria mundi, which is
Latin for "when you're hot, your hot; when you're not, you're not" or
something like that.

If you have a big investment in C++ and can crank out beautiful code in your
sleep, that's fine too. I just don't expect it to be as easy to find people
to maintain it as if it were written in C, or Python, or Java, or whatever.





From swalters_usenet at yahoo.com  Fri Jan  9 04:00:41 2004
From: swalters_usenet at yahoo.com (Samuel Walters)
Date: Fri, 09 Jan 2004 09:00:41 GMT
Subject: Looking for help with regular expressions- not Python Specific
References: <8d3e714e.0401072114.5bf3fba7@posting.google.com>
Message-ID: <pan.2004.01.09.08.59.23.513059@yahoo.com>

|Thus Spake Tony C On the now historical date of Wed, 07 Jan 2004 21:14:52
-0800|

> I'm writing a python program which uses regular expressions, but I'm
> totally new to regexps.
> 
> I've got Kuchling's "Regexp HOWTO", "Mastering Regular Expresions" by
> Oreilly, and have access to online stuff too.

It may be more than you're looking for, but regular expressions are a nice
compact encoding of finite state machines.  If you really, really, really
want to grok regexp's and are willing to make an investment of time in it,
then you are best to understand fsm's.  Searching for understandable
material could be tough going.  You'll come across a lot of cryptic
mathematical papers.  My tip is that you'll start turning up papers that
include references to push down automata and turing machines.  These are
more powerful versions of finite state machines, but not directly related
to regexps.  Skip over them.  Really, anyone with a solid understanding of
programming fundamentals should be able to understand fsm's.  I would
point you to some resources, but I haven't got any handy.

Happy Hunting.

Sam Walters.

P.S.  If you look deeper into finite state machines, push down automata,
turing machines and the lambda calculus, your soul will merge with the
deeper zen of computer programming.  Deep understanding of these four
concepts (whether that understanding is conscious or unconscious) is what
separates good programmers from truly great ones.  I suggest "Godel,
Escher, Bach" by Douglas Hofstadter as a good, but dizzying, introduction
to this territory.


-- 
Never forget the halloween documents.
http://www.opensource.org/halloween/
""" Where will Microsoft try to drag you today?
    Do you really want to go there?"""



From tjreedy at udel.edu  Thu Jan 29 21:58:46 2004
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 29 Jan 2004 21:58:46 -0500
Subject: Safe to modify globals(), or not?
References: <6714766d.0401291559.45413e0d@posting.google.com>
Message-ID: <bvch8l$r9p$1@sea.gmane.org>


"Robert Dodier" <robert_dodier at yahoo.com> wrote in message
news:6714766d.0401291559.45413e0d at posting.google.com...
> Hello,
>
> I'm interested in introducing new variables into the environment
> of a Python interpreter or program.

This is a bit vague and not obviously connected to your question.  Let's
ignore this.
Globals() returns the module-specific 'global' namespace, as opposed to the
function-local namespace.

> In reading through old posts to this newsgroup, I see there is
> an often-repeating warning against modifying the contents of locals().

Outside of functions, locals() == globals().  Inside of functions, where
locals() != globals() and is therefore not redundant and potentially
useful, the result is only guaranteed to be a read-only *copy* of the
current state of the local namespace.  Even if it is writable, the changes
may only change the *copy* and not the local namespace itself.  This makes
for subtle bugs when the programmer expects (if falsely) that changes are
propagated.

> Fair enough. However, is there anything wrong with modifying globals()

No.  "globals()['a'] = 3" is exactly the same as "a=3" executed at module
scope, outside of functions.  The purpose is to allow you to set a variable
whose name you do not know until runtime.  An example, as in your
application, is when the name comes from user input.

Having said that, you do need to ask yourself whether you really want to
put user variables in the global namespace that your are using yourself for
your code, which will wreck havoc when there is a name collision.  Or
whether you should put them is a separate namespace dict such as uservars.
And then exec user code with uservars as the globals.  Or something like
that.

Terry J. Reedy






From trentm at activestate.com  Wed Jan 28 19:49:27 2004
From: trentm at activestate.com (Trent Mick)
Date: Wed, 28 Jan 2004 16:49:27 -0800
Subject: executing an external app
In-Reply-To: <20040128210948.GZ18498@unpythonic.net>;
	from jepler@unpythonic.net on Wed, Jan 28, 2004 at 03:09:48PM
	-0600
References: <Pine.GSO.4.58.0401281558280.26750@denali.ccs.neu.edu>
	<20040128210948.GZ18498@unpythonic.net>
Message-ID: <20040128164927.A3849@ActiveState.com>

[Jeff Epler wrote]
> Try one or more of these:
> 
> os.system, os.spawn*, popen2.*, os.fork + os.exec* (where os.fork is
> supported, at least), popen5 (third-party module, posix/unix only),
> win32??? (not sure of name, included in win32all, for Windows only)

You could try process.py. Windows and Unix.

    http://starship.python.net/crew/tmick/#process

Cheers,
Trent

-- 
Trent Mick
TrentM at ActiveState.com



From nomail at nospam.net  Mon Jan 12 10:12:13 2004
From: nomail at nospam.net (Olaf Meyer)
Date: Mon, 12 Jan 2004 15:12:13 GMT
Subject: building strings with variable input
In-Reply-To: <400273B8.E991F41D@alcyone.com>
References: <pduMb.6321$g4.137247@news2.nokia.com>
	<400273B8.E991F41D@alcyone.com>
Message-ID: <hPyMb.6433$k4.143624@news1.nokia.com>

Erik Max Francis wrote:

> Olaf Meyer wrote:
> 
> 
>>Especially if you have a lot of variable input it makes it hard to
>>match
>>the variables to the proper fields. From other scripting languanges
>>I'm
>>used to something like:
>>
>>  $cmd = "$executable -start $startTime -end $endTime -dir $directory"
>>
>>This makes it very easy to see how the string is actually built. You
>>dont't have to worry where which variables go.
>>
>>Is there a similar way to do this in python?
> 
> 
> Sure:
> 
> cmd = "%(executable)s -start %(startTime)s -end %(endTime)s -dir
> %(directory)s" % locals()
> 
> There are also more expansive solutions such as YAPTU or EmPy.
> 
> Note, however, that what you are trying to do (presuming you're passing
> this to os.system or something similar) is potentially a serious
> security risk.  If the values of the strings you are constructing the
> command line are not fully trustworthy, they can be easily manipulated
> to make your program execute arbitrary shell commands.
> 

Erik,

thanks for your solution suggestion and pointing out the security risks. 
However security is not an issue in my case ;-)

Olaf


From http  Thu Jan  1 15:36:34 2004
From: http (Paul Rubin)
Date: 01 Jan 2004 12:36:34 -0800
Subject: Rekall Binary
References: <8a27e309.0312310529.3c1f43a8@posting.google.com>
	<bsvel2$4n2$1@news.nems.noaa.gov>
	<8a27e309.0401010633.20271486@posting.google.com>
Message-ID: <7xpte3o17x.fsf@ruckus.brouhaha.com>

ny_r_marquez at yahoo.com (R.Marquez) writes:
> How strong a buisness model is GPL software is a relative issue.  If
> you mean making the kind of money that software developer houses used
> to make in the BOS (Before Open Source) days then it isn't.  But you
> just may be able to support your family on it and pay the rent (and
> maybe even buy a modest house if you are really successful).  I see
> nothing wrong with that.  This are hard times you know.

An acquaintance of mine started a GPL-centric company, Cygnus
Solutions, that at first mainly supported GCC.  One of the first
things he did as sufficient profits appeared was bought himself a
Maserati with the license plate "GNU CC".  He did that specifically to
show off how one could make money doing free software.  The company
was later sold to Red Hat, another GPL-centric company, for an amount
in excess of $100 million.  


From http  Sat Jan 31 23:37:53 2004
From: http (Paul Rubin)
Date: 31 Jan 2004 20:37:53 -0800
Subject: OT: why do web BBS's and blogs get so slow?
References: <7xbrojk9rk.fsf_-_@ruckus.brouhaha.com>
	<KeGdnYNFW94u64Hd4p2dnA@speakeasy.net>
Message-ID: <7xznc3xvmm.fsf@ruckus.brouhaha.com>

"A.M. Kuchling" <amk at amk.ca> writes:
> * Some of that slowness may be latency on the client side, not the server. A
>   heavily table-based layout may require that the client get most or all of
>   the HTML before rendering it.  Slashdot's HTML is a nightmare of tables;
>   some weblogs have CSS-based designs that are much lighter-weight.

Yeah, I'm specifically concerned about how severs get overloaded.

> * To build the top page, Slashdot requires a lot of SQL queries.
>   There's the list of stories itself, but there are also lists of
>   subsections (Apache, Apple, ...), lists of stories in some
>   subsections (YRO, Book reviews, older stories), icons for the
>   recent stories, etc. All of these may need an SQL query, or at
>   least a lookup in some kind of cache.

That's what I'm saying--in a decently designed system, a common
operation like a front page load should take at most one SQL query, to
get the user preferences.  The rest should be in memory.  The user's
preferences can also be cached in memory so they'd be available with
no SQL queries if the user has connected recently.  On Slashdot, an
LRU cache of preferences for 10,000 or so users would probably
eliminate at least half those lookups, since those are the ones who
keep hitting reload.

>   It also displays counts of posts to each story (206 of 319 comments),
>   but I don't think it's doing queries for these numbers; instead there 
>   are extra columns in various SQL tables that cache this information 
>   and get updated somewhere else.  

That stuff would just be in memory.

> * I suspect the complicated moderation features chew up a lot of time.  You
>   take +1 or -1 votes from people, and then have to look up information
>   about the person, and then look at how people assess this person's 
>   moderation...  It's not doing this on every hit, though, but this feature
>   probably has *some* cost.  

Nah, that's insignificant.  Of 10k messages a day, maybe 1/3 get
moderated at all, but some get moderated more than once, so maybe
there's 5k moderations a day.  Each is just an update to the metadata
for the article, cost close to zero.

> * There are lots of anti-abuse features, because Slashdot takes a lot 
>   of punishment from bozos.  Perhaps the daily traffic is 10,000
>   that get displayed plus another 10,000 messages that need to be filtered
>   out but consume database space nonetheless.

I think 10,000 total is on the high side, just adding up the number of
comments on a typical day.

> * Slashcode actually implements a pretty generic web application system that
>   runs various templates and stitches together the output.

Yeah, I think it's doing way too much abstraction, too much SQL, etc.

> > 3) The message store would be two files, one for metadata and one for
> > message text.  Both of these would be mmap'd into memory.  There would
> > be a fixed length of metadata for each message, so getting the
> > metadata for message #N would be a single array lookup.  The metadata
> 
> I like this approach, though I think you'd need more files of metadata, e.g.
> the discussion of story #X starts with message #Y.  

Basically, a story would just be a special type of message, indicated
by some field in its metadata.  Another field for each message would
say where the next message in that story was (or a special marker if
it's the last message).  So the messages would be in a linked list.
You'd remember in memory where the last message of each story is, so
you could append easily.  You'd also make an SQL record for each story
so you can find the stories again on server restart.

> (Note that this is basically how Metakit works: it mmaps a region of
> memory and copies data around, provided a table-like API and letting
> you add and remove columns easily.  It might be easier to use
> Metakit than to reinvent a similar system from scratch.  Anyone know
> if this is also how SQLite works?)

Wow cool, I should look at Metakit.

> Maybe threading would be a problem with fixed-length metadata records.  It
> would be fixed-length if you store a pointer in each message to its parent,
> but to display a message thread you really want to chase pointers in the
> opposite directory, from message to children. But a message can have an
> arbitrary number of children, so you can't store such pointers and have
> fixed-length records any more.

Each metadata record would have a pointer to its parent, and another
pointer to the chronologically next record in that story.  So you'd
read in a story by scanning down the linear chronological list, using
the parent pointers to build tree structure in memory as you go.  If
you cache a few dozen of these trees, you shouldn't have to do those
scans very often (you'd do one if a user visits a very old story whose
tree is not in cache).  


From ahmed.mohamed.edigram at wanadoo.fr  Tue Jan 20 04:54:38 2004
From: ahmed.mohamed.edigram at wanadoo.fr (Ahmed MOHAMED ALI)
Date: Tue, 20 Jan 2004 10:54:38 +0100
Subject: Offre d'emploi
Message-ID: <buitjo$a9n$1@news-reader3.wanadoo.fr>

Editeur de logiciel sp?cialis? dans le domaine des syst?mes d'information
pour les m?dias,cherche un d?veloppeur pour int?grer un projet de portail
internet sous zope/python.Le candidat doit avoir au moins un an d'exp?rience
dans le d?veloppement
d'applications.La connaissance de python serait fortement appr?cici?e et
celle de zope,c/c++ et vb6 serait un plus.En outre,le
candidat doit conna?tre les syst?mes d'exploitation Windows 2000 et Linux.Il
doit ?tre
rigoureux,curieux,autonome et disposer d'un tr?s bon sens relationnel pour
int?grer notre ?quipe de d?veloppement.

Lieu de travail : Paris, France.
Envoyer cv,lettre de motivation et pr?tentions ?
max.herve.edigram at wanadoo.fr





From merkosh at hadiko.de  Sun Jan 25 17:25:39 2004
From: merkosh at hadiko.de (Uwe Mayer)
Date: Sun, 25 Jan 2004 23:25:39 +0100
Subject: find function
Message-ID: <bv1fp0$s84$1@news.rz.uni-karlsruhe.de>

Hi,

is there for python a find() function, like the perl module Find or the
command line tool find?

All I found was os.listdir(<path>), but that does return all files in a
folder. I'd like to have i.e. regex or shell-like file selections, as in:

$ find -name \*.pyc -maxdepth 1

Thanks
Ciao
Uwe
-- 
        


From jepler at unpythonic.net  Thu Jan 15 14:43:46 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Thu, 15 Jan 2004 13:43:46 -0600
Subject: python & mathematical methods of picking numbers at random
In-Reply-To: <bu6ptu$kjm$1@solaris.cc.vt.edu>
References: <bu6ptu$kjm$1@solaris.cc.vt.edu>
Message-ID: <20040115194328.GA7659@unpythonic.net>

It sounds like your co-worker has re-written sample.  random.sample(l, 1)
is the same as random.choice(l), so that's another source of inefficiency.

But why are *you* using 
    random.sample(range(len(x)), 25)
instead of
    random.sample(x, 25)
?

Jeff



From claird at lairds.com  Wed Jan 28 08:13:58 2004
From: claird at lairds.com (Cameron Laird)
Date: Wed, 28 Jan 2004 13:13:58 -0000
Subject: Tcl style traces
References: <40171be5$0$1742$5a62ac22@freenews.iinet.net.au>
	<mailman.890.1075270902.12720.python-list@python.org>
	<40177f07$0$1730$5a62ac22@freenews.iinet.net.au>
Message-ID: <101fdcm8b5b8sda@corp.supernews.com>

In article <40177f07$0$1730$5a62ac22 at freenews.iinet.net.au>,
Derek Fountain  <nomail at hursley.ibm.com> wrote:
>> What do you need this for?  If you can be more specific, we might be able
>> to help you a little better.
>
>I have a Tcl/Tk script which uses a canvas to graphically represent the data
>stored in the program. Whenever the data store is updated, a Tcl trace
>automatically triggers to ensure the graphical display is kept consistent
>with the data. I was after a simple way to convert the script to Python
>Tkinter. Without the eqivalent of Tcl traces I'm probably going to have to
>think about it... ;o)

Newsgroups: comp.lang.python
Subject: Re: Tcl style traces
Summary: 
Expires: 
References: <40171be5$0$1742$5a62ac22 at freenews.iinet.net.au> <mailman.890.1075270902.12720.python-list at python.org> <40177f07$0$1730$5a62ac22 at freenews.iinet.net.au>
Sender: 
Followup-To: 
Reply-To: claird at phaseit.net
Distribution: 
Organization: The Lairds
Keywords: 
Cc: 

In article <40177f07$0$1730$5a62ac22 at freenews.iinet.net.au>,
Derek Fountain  <nomail at hursley.ibm.com> wrote:
>> What do you need this for?  If you can be more specific, we might be able
>> to help you a little better.
>
>I have a Tcl/Tk script which uses a canvas to graphically represent the data
>stored in the program. Whenever the data store is updated, a Tcl trace
>automatically triggers to ensure the graphical display is kept consistent
>with the data. I was after a simple way to convert the script to Python
>Tkinter. Without the eqivalent of Tcl traces I'm probably going to have to
>think about it... ;o)

The Pythonic thing to do is to intercept the data store's set or 
__setattr__ or ... method.
-- 

Cameron Laird <claird at phaseit.net>
Business:  http://www.Phaseit.net


From lvrk at yahoo.com  Fri Jan  2 19:40:15 2004
From: lvrk at yahoo.com (Raghav Lagisetty)
Date: 2 Jan 2004 16:40:15 -0800
Subject: cgi using what?
References: <d99e1341.0401020356.5226878f@posting.google.com>
Message-ID: <a6d3c416.0401021640.ec58cd6@posting.google.com>

crescent_au at yahoo.com (Ben) wrote in message news:<d99e1341.0401020356.5226878f at posting.google.com>...
> Hi all,
> 
> I wanna use Python for creating a questionnaire. Is it a good choice
> using python on the basis of its availability? I wanna know if most
> servers support python or not... I don't know about the server yet..
> so which language will be a good choice?

Recently, I was in the same boat as you deciding on which server side 
scripting language to use.  I had to design a web based application which 
takes inputs from users using HTML forms. The user details and inputs are 
stored in a databse and are retrieved on demand.


I had worked with Perl before but decided to go for Python this time for 
several reasons:
 
1) I wanted to try out something new. 
2) Readability and manageability of perl scripts is pretty bad 
3) A quick look at Python's tutorials told me that the learning curve was not  
   very steep. (Goto www.python.org)
4) Found some cool python modules to generate HTML page layouts which helped
   me to jump into my problem right away instead of concentrating on the page  
   designs. (http://ht2html.sourceforge.net/)

Regarding your question about the server side support, Apache web servers 
definitely support python. You might have to dig a little bit to find out what 
server you have and whether it supports Python.

Hope that helps,
Raghav.


From km at mrna.tn.nic.in  Fri Jan 16 05:08:19 2004
From: km at mrna.tn.nic.in (km)
Date: Fri, 16 Jan 2004 15:38:19 +0530
Subject: python mode vi
Message-ID: <20040116100819.GA19095@mrna.tn.nic.in>


 hi all,
 
 how to invoke python mode in vi editor ? 
 
 kindly enlighten,
 regards,
 KM



From zm23 at seznam.cz  Fri Jan  2 02:10:19 2004
From: zm23 at seznam.cz (Zdenda)
Date: 1 Jan 2004 23:10:19 -0800
Subject: Python 2.3.3 compilation problem
Message-ID: <fba51ba7.0401012310.599d626d@posting.google.com>

Hi, i have RH9 and i need python 2.3. I executed tgz file and typed ./configue. 
Then i type make. It is without problem. When I type make install ...
...
...
Compiling /usr/local/lib/python2.3/xml/sax/handler.py ...
Compiling /usr/local/lib/python2.3/xml/sax/saxutils.py ...
Compiling /usr/local/lib/python2.3/xml/sax/xmlreader.py ...
Compiling /usr/local/lib/python2.3/xmllib.py ...
Compiling /usr/local/lib/python2.3/xmlrpclib.py ...
Compiling /usr/local/lib/python2.3/zipfile.py ...
make: *** [libinstall] Error 1

Have somebody any idea where is error?
Thanks


From mike at triplepc.com  Mon Jan  5 15:16:16 2004
From: mike at triplepc.com (Michael T. Babcock)
Date: Mon, 05 Jan 2004 15:16:16 -0500
Subject: Pre-PEP: new Path class
In-Reply-To: <E1AdauQ-000408-Qz@mail.python.org>
References: <E1AdauQ-000408-Qz@mail.python.org>
Message-ID: <3FF9C610.1090300@triplepc.com>

>
>
>I see what you're saying. I'd argue (softly) that iterating over
>> the directory entries is the natural interpretation, though.
>  
>
>
>It's far too implicit to my taste; for one since it's a folder-only 
>operation (and I don't see much merit in having separate classes for 
>folder and file paths). Would you also be in favor of interating over 
>  
>
>file-paths meaning iterating over the lines in the file?
>

I was thinking about how I'd expect to use such a class and think 
perhaps neither iterator type should exist.  If an iterator exists for a 
path, it should probably  be for the elements of the path, not what the 
path points to.  These are different objects, in my mind.

 > Path path
 > path.parse("/usr/share/doc")
 > for item in path:
 >     print str(item)
usr
share
doc
 > print str(path[0]) # get top-level path element
/usr
 > print str(path[:-1]) # get parent to path
/usr/share
 > for item in os.pathwalk(path):
 >    # Do stuff
 >    pass
 > f = file(path + "mydoc.txt", "r')
 > f.close()

... any thoughts?  I see a Path object as being very useful, in that it 
can hide the concepts of parsing and using paths from the user, but it 
shouldn't "understand" what its pointing to, whether a pipe or a file or 
a directory or a special device.  Those are features for their own 
specific objects which can use the data stored in a Path object.
-- 
Michael T. Babcock
http://www.fibrespeed.net/~mbabcock/



From Mike at DeleteThis.Geary.com  Mon Jan  5 11:49:58 2004
From: Mike at DeleteThis.Geary.com (Michael Geary)
Date: Mon, 5 Jan 2004 08:49:58 -0800
Subject: Embedding Python with Dynamic Loading (win)
References: <5e571368.0401050603.265d469d@posting.google.com>
Message-ID: <vvj5dqcoctrteb@corp.supernews.com>

Simon Steele wrote:
> I'm trying to embed python into my application, and have
> everything working fine using the static import lib.
> However, I don't want my application to be dependant on
> python being installed (it's an optional script interpreter).
> Therefore I want to be able to dynamically load python
> instead (which I believe is possible, but I can't find any
> examples for). It seems, however, that the import lib is
> imported in python.h using a pragma statement.
>
> 1. Is there any suggested way to prevent this import
> without modifying python.h?

Assuming you're using Visual C++, you could use delay loading, which
essentially converts any imported DLL to use LoadLibrary/GetProcAddress
without requiring any code changes.

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vccore/html/vcconLinkerSupportForDelayedLoadingOfDLLs.asp

or

http://tinyurl.com/2bmzr

-Mike




From drconrad at metaplay.com.au  Fri Jan 23 03:50:02 2004
From: drconrad at metaplay.com.au (SimonW)
Date: Fri, 23 Jan 2004 16:50:02 +0800
Subject: Modem beeping
In-Reply-To: <001c01c3e18d$260b02c0$b10d10ac@metasalio>
Message-ID: <004301c3e18d$e46a35b0$0000fea9@simonxp>

This question is completely un-related to python, however, I do believe
ATAH0 should do the trick.

regards,

SimonW.




From jl at windsmith.net  Sat Jan 10 11:44:09 2004
From: jl at windsmith.net (John Lull)
Date: 10 Jan 2004 10:44:09 -0600
Subject: Multithreaded COM server problem...
Message-ID: <5a90009ufdd66okc8osajrn1a5kokp86mk@4ax.com>

I'm writing a multithreaded COM server to manage a pool of hardware resources.
All objects are designed to be thread-safe, and I've set sys.coinit_flags to
COINIT_MULTITHREADED before importing pythoncom.

The problem is that all requests to the server seem to be serialized by COM. To
demonstrate the problem, I'm including a simple test server that exposes one
interface object, PyComThreads.Application, with a single method sleep(delay).
I'm also including 2 test programs -- test20.py uses the server to delay 20
seconds, and test1.py delays only one second. The server prints status messages
to the trace collector debugging tool when creating the Application object, and
at the beginning and end of the specified delay.


When I run the 20-second test program, then a couple seconds later run the
1-second test program, I had expected to see something like this:

  Object 8087872 in thread 8160416 created
  Object 8087872 in thread 8160416 delays 20 seconds
  Object 8086008 in thread 8156272 created
  Object 8086008 in thread 8156272 delays 1 seconds
  Object 8086008 delay ends
  Object 8087872 delay ends


Instead, I see:

  Object 8087872 in thread 8160416 created
  Object 8087872 in thread 8160416 delays 20 seconds
  Object 8087872 delay ends
  Object 8086008 in thread 8160416 created
  Object 8086008 in thread 8160416 delays 1 seconds
  Object 8086008 delay ends


Apparently the requests from both client applications are being serialized by
the COM interface.

I need each request (or at least each interface object) to run in its own
thread, or in a pool of threads, and haven't been able to figure out how to
accomplish this. Any suggestions would be appreciated.


Regards,
John

----------
PyComThreads.py:

import sys
import threading
from   time import sleep
import win32traceutil

sys.coinit_flags = 0    # 0 == pythoncom.COINIT_MULTITHREADED   # !!!!!
import pythoncom

class Application:
    """ Test version of a Multi-threaded local server """

    _reg_progid_        = 'PyComThreads.Application'
    _reg_verprogid_     = 'PyComThreads.Application.100'
    _reg_clsctx_        = pythoncom.CLSCTX_LOCAL_SERVER
    _reg_clsid_         = '{56BEC27D-EDC4-43A0-AEB7-77E4A1381C0F}'

    _public_methods_    = ['sleep']
    _public_attrs_      = []
    _readonly_attrs_    = []

    def __init__(self):
        print 'Object %s in thread %s created' % \
              (id(self), id(threading.currentThread()))

    def sleep(self, delay):
        print 'Object %s in thread %s delays %s seconds' % \
              (id(self), id(threading.currentThread()), delay)
        sleep(delay)
        print 'Object %s delay ends' % id(self)

# COM server registration, etc.
if __name__ == '__main__':
    if hasattr(sys, 'argv'):
        # If *no* command-line arguments, we were not invoked as a server.
        # Assume the user wants us to self-register.
        if len(sys.argv) == 1:
            sys.argv.append('--register')

    import win32com.server.register
    win32com.server.register.UseCommandLine(Application, debug=0)

----------
test20.py:

from win32com.client import Dispatch
app=Dispatch('PyComThreads.Application')
app.sleep(20)

----------
test1.py:

from win32com.client import Dispatch
app=Dispatch('PyComThreads.Application')
app.sleep(1)



From python at hitmedia.com  Sat Jan 24 18:41:26 2004
From: python at hitmedia.com (Python Baby)
Date: Sat, 24 Jan 2004 15:41:26 -0800
Subject: [OPINION] - does language really matter if they all do the same
	thing?
In-Reply-To: <4012FEB1.5000106@prescod.net>
References: <69A0D4AB81C51447AD6BA387782B8D64093D8A@midl-mail4.etcconnect.com>
	<028FD9F0-4E01-11D8-BB78-0003934ACDEC@zdome.net>
	<4011C497.1040302@prescod.net>
	<58587302-4E30-11D8-8FAB-0003934ACDEC@zdome.net>
	<4012FEB1.5000106@prescod.net>
Message-ID: <20040124234126.GB42028@mail.hitmedia.com>

> Of course there are (rare) circumstances where the other languages' 
> advantages are so extreme that it justifies the cost of integration, 
> distribution, training, etc.

This would be a good statement to bring this thread back to my original
question on:

""" Since my old website needed an overhaul anyway, I thought it'd be a
good time to learn [OOP]...  Wondering if, since I'm
about to re-write my entire website anyway, if I should use
Ruby or Python instead of PHP.
As I've fretted over this for way too many hours, I started wondering:
Can Ruby do something (important) that Python can't?
Can Python do something (important) that PHP can't?
Can PHP do something (important) that Ruby or Python can't?"""


Has anyone here ever looked at different languages for making an
interactive website, and felt that Python was the best choice of 
language to use?

It would definitely be a learning curve for me, since I know PHP so well,
but if it had some great benefits, I'd go for it.
(Half just for fun, to learn something new.)





From max at cNvOiSsiPoAnMtech.com  Wed Jan 14 11:15:17 2004
From: max at cNvOiSsiPoAnMtech.com (Maxim Khesin)
Date: Wed, 14 Jan 2004 16:15:17 GMT
Subject: FRPythoneers Meeting -- January 19, 2004
In-Reply-To: <mailman.357.1074095627.12720.python-list@python.org>
References: <mailman.357.1074095627.12720.python-list@python.org>
Message-ID: <pWdNb.78160$cM1.13263271@twister.nyc.rr.com>

Jeffery D. Collins wrote:

> January 19, 2004, 7:00PM at Level 3 Communications in Broomfield, CO.
> 
> Title:  Jython, the best of both worlds or the lowest common denominator
> Author:  Demian L. Neidetcher
> 
> Abstract:
> Python is a language that this choir knows has many great features.  
> Admittedly, Java has some benefits that Python doesn't; it has great 
> momentum behind it and it has a good install base. 
> Jython allows us to take advantage of the usability and rapid 
> development of Python as well as being able to use popular Java class 
> libraries and take advantage of the popularity of the Java Virtual Machine.

This sounds cool. Could you posta link to the presentation for the rest 
of us not in Broomfield, CO, if it's not too much work?
thanks,
max


From bart_nessux at hotmail.com  Sun Jan 18 21:38:10 2004
From: bart_nessux at hotmail.com (Bart Nessux)
Date: Sun, 18 Jan 2004 21:38:10 -0500
Subject: How to hide user's input
Message-ID: <buffui$705$1@solaris.cc.vt.edu>

locale = input("Where is the property located?\n 1. Town\n 2. City\n 3. 
County\n")

How do I hide the input that the user types? The program runs in the 
bash shell.

TIA!!!



From newsgroups at jhrothjr.com  Mon Jan  5 18:36:52 2004
From: newsgroups at jhrothjr.com (John Roth)
Date: Mon, 5 Jan 2004 18:36:52 -0500
Subject: Pre-PEP: new Path class
References: <E1AdauQ-000408-Qz@mail.python.org>
	<mailman.114.1073333780.12720.python-list@python.org>
Message-ID: <vvjta4mdong09c@news.supernews.com>


"Michael T. Babcock" <mike at triplepc.com> wrote in message
news:mailman.114.1073333780.12720.python-list at python.org...
> >
> >
> >I see what you're saying. I'd argue (softly) that iterating over
> >> the directory entries is the natural interpretation, though.
> >
> >
> >
> >It's far too implicit to my taste; for one since it's a folder-only
> >operation (and I don't see much merit in having separate classes for
> >folder and file paths). Would you also be in favor of interating over
> >
> >
> >file-paths meaning iterating over the lines in the file?
> >
>
> I was thinking about how I'd expect to use such a class and think
> perhaps neither iterator type should exist.  If an iterator exists for a
> path, it should probably  be for the elements of the path, not what the
> path points to.  These are different objects, in my mind.
>
>  > Path path
>  > path.parse("/usr/share/doc")
>  > for item in path:
>  >     print str(item)
> usr
> share
> doc
>  > print str(path[0]) # get top-level path element
> /usr
>  > print str(path[:-1]) # get parent to path
> /usr/share
>  > for item in os.pathwalk(path):
>  >    # Do stuff
>  >    pass
>  > f = file(path + "mydoc.txt", "r')
>  > f.close()
>
> ... any thoughts?  I see a Path object as being very useful, in that it
> can hide the concepts of parsing and using paths from the user, but it
> shouldn't "understand" what its pointing to, whether a pipe or a file or
> a directory or a special device.  Those are features for their own
> specific objects which can use the data stored in a Path object.

So you're saying that a file object or a directory object "has-a"
path object? Sounds right to me.

John Roth
> -- 
> Michael T. Babcock
> http://www.fibrespeed.net/~mbabcock/
>




From gerrit at nl.linux.org  Tue Jan  6 14:04:39 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Tue, 6 Jan 2004 20:04:39 +0100
Subject: PRE-PEP: new Path class
In-Reply-To: <3FF9D91E.2090302@rogers.com>
References: <vvivefh35qjv9a@news.supernews.com> <3FF9D91E.2090302@rogers.com>
Message-ID: <20040106190439.GB4581@nl.linux.org>

Mike C. Fletcher wrote:
> >9) Current OS constants?
> >
> >What are they? Are we talking about the four
> >constants in the access() function, or about something
> >else?
> > 
> >
> Don't know myself.

I meant os.path constants: curdir, pathsep, defpath, etc.
They should be included.

> >use the visitor pattern directly, with different method
> >names for files, directories and whatever else a
> >particular file system has in it's warped little mind.
> > 
> >
> Reworking walk is probably a good idea.  I'll let others worry about it, 
> as I've re-implemented the functionality so many times for my own code 
> that I'm just sick of it :) .

I think os.walk is good as it is.

yours,
Gerrit.

-- 
34. If a ... or a ... harm the property of a captain, injure the
captain, or take away from the captain a gift presented to him by the
king, then the ... or ... shall be put to death.
          -- 1780 BC, Hammurabi, Code of Law
-- 
Asperger's Syndrome - a personal approach:
	http://people.nl.linux.org/~gerrit/english/



From bcd at pvv.ntnu.no  Wed Jan 14 09:22:30 2004
From: bcd at pvv.ntnu.no (Bent C Dalager)
Date: Wed, 14 Jan 2004 14:22:30 +0000 (UTC)
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
	<pan.2004.01.14.01.17.00.970198@fakeemail.com>
Message-ID: <bu3jb6$n2u$5@tyfon.itea.ntnu.no>

In article <pan.2004.01.14.01.17.00.970198 at fakeemail.com>,
Dan Olson  <hatespam at fakeemail.com> wrote:
>  Cygwin is a horrible horrible
>way to run things on Windows, and I'd like to take this time to insult the
>mothers of everyone who has ever made their Linux application run on
>Windows using only Cygwin.

I've always thought of Cygwin as

1) an excellent way to run the Unix-like tools that I know and love and

2) a useful intermediate step while porting an app to Windows.

Now, except as a quick first step to achieving (2) I don't really know
why anyone would put much effort into "porting to CygWin". Isn't part
of the point that most things will just automatically work under
CygWin so that you get (1) pretty much for free?

Cheers
	Bent D
-- 
Bent Dalager - bcd at pvv.org - http://www.pvv.org/~bcd
                                    powered by emacs


From computer.problemen at skynet.be  Fri Jan  9 08:05:41 2004
From: computer.problemen at skynet.be (broebel)
Date: Fri, 9 Jan 2004 14:05:41 +0100
Subject: debugging makes a person a better programmer
Message-ID: <3ffea564$0$296$ba620e4c@news.skynet.be>

I'm just wondering,

people tell me that helping to debug someone elses program is a really good
way to learn to understand the language it's programmed in.

My question is: from wich point of can someone start to try to help a
programmer by debugging or testing a program.

If indeed you already need a profound knowledge of the language than how can
you learn something about it? except for the fact that you see other
possibilities of way to programm.

Are there pages that can be found with programs to help understand the
language or the way to use the language.

thanks in advance
 ik




From deets_noospaam at web.de  Wed Jan 14 13:25:38 2004
From: deets_noospaam at web.de (Diez B. Roggisch)
Date: Wed, 14 Jan 2004 19:25:38 +0100
Subject: passing callback function to c-extension
References: <bu3h15$dlk$00$1@news.t-online.com>
	<bu3n65$1pk$1@news-reader5.wanadoo.fr>
	<bu3rmk$t1h$01$1@news.t-online.com>
	<mailman.361.1074099750.12720.python-list@python.org>
Message-ID: <bu41j2$4in$00$1@news.t-online.com>

>     Diez> I'm now looking for a way to ensure that the passed object is
>     Diez> actually a callable one
> 
> Try it and see.  If an exception is raised, just return NULL.  The
> appropriate exception stuff will have been set.

Thanks - I already found out about that. Its incredible - a few hours of
work (mostly because I've actually have to _learn_ something new, not
because of the api makes things complicated) and I've got my wrapper. If I
can keep up that pace, I'll release my wrapper this night, or tomorrow :)

Regards,

Diez


From eddie at holyrood.ed.ac.uk  Tue Jan 27 12:23:24 2004
From: eddie at holyrood.ed.ac.uk (Eddie Corns)
Date: Tue, 27 Jan 2004 17:23:24 +0000 (UTC)
Subject: os.path.split: processing paths from one OS on another
References: <mailman.868.1075220957.12720.python-list@python.org>
Message-ID: <bv66qc$ctm$1@scotsman.ed.ac.uk>

Martijn Ras <ras at holmes.nl> writes:

>Heya folks,

>I ran into the following problem:

>When i run this on Windows everything is as expected:
>C:\>python
>Python 2.2.3 (#42, May 30 2003, 18:12:08) [MSC 32 bit (Intel)] on win32
>Type "help", "copyright", "credits" or "license" for more information.
> >>> import os
> >>> file='/TEST/FILE.EXT'
> >>> print os.path.split(file)
>('/TEST', 'FILE.EXT')
> >>> file='C:\\TEST\\FILE.EXT'
> >>> print os.path.split(file)
>('C:\\TEST', 'FILE.EXT')

>However, when i run this on Linux the results are unexpected:
>$ python
>Python 2.2.3 (#1, Nov 12 2003, 15:53:11)
>[GCC 2.96 20000731 (Red Hat Linux 7.3 2.96-110)] on linux2
>Type "help", "copyright", "credits" or "license" for more information.
> >>> import os
> >>> file='/TEST/FILE.EXT'
> >>> print os.path.split(file)
>('/TEST', 'FILE.EXT')
> >>> file='C:\\TEST\\FILE.EXT'
> >>> print os.path.split(file)
>('', 'C:\\TEST\\FILE')

Well, that is correct behaviour for any unix type machine because \ and C: are
just part of a filename, the only special character in a unix file name is /
(the directory separator).  So if the user is trying to specify a file on the 
unix system either they will need to use unix conventions or you will need to
do your own mapping from windowsland names to unixland names.  Since Python
already does the mapping in the opposite direction (ie making everything look
like a unix name) it might make more sense to adopt this convention.  Of
course, if your actual purpose is simply to manipulate filenames rather than
use the name to reference a file then you need to use the library functions
specific to the OS (in this case windows) which someone else has already
mentioned.

Eddie


From jepler at unpythonic.net  Sun Jan  4 16:51:06 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Sun, 4 Jan 2004 15:51:06 -0600
Subject: Problems compiling python
In-Reply-To: <bta0pq$v7$00$1@news.t-online.com>
References: <bt9u1m$ek3$05$1@news.t-online.com> <3FF88279.33BF192A@alcyone.com>
	<bta0pq$v7$00$1@news.t-online.com>
Message-ID: <20040104215106.GA1075@unpythonic.net>

see Misc/setuid-prog.c in the Python source distribution.

Jeff



From gagenellina at softlab.com.ar  Mon Jan  5 19:26:16 2004
From: gagenellina at softlab.com.ar (Gabriel Genellina)
Date: Mon, 05 Jan 2004 21:26:16 -0300
Subject: problem with async chat client in windows
In-Reply-To: <btagiv$91o$1@news.gu.se>
Message-ID: <5.2.1.1.0.20040105212550.0270b150@192.168.0.115>

At 5/1/2004 03:02, you wrote:

>I'm writing a small chat client to learn some python and networking. No 
>problem with the network stuff tho, the problem is when the user should be 
>able to interact and type messages to send. Since I work with windows I 
>can't use the select function 
>(http://www.python.org/doc/current/lib/module-select.html). Maybe it could 
>work if I use two threads? One thread reading keyboard and the other 
>handling network stuff, but I would prefer to leave threads out from this. 
>Any suggestions?

You could try asyncore


Gabriel Genellina
Softlab SRL




From me at here.there.com  Tue Jan 13 21:44:23 2004
From: me at here.there.com (Peter Ashford)
Date: Wed, 14 Jan 2004 15:44:23 +1300
Subject: ProtoCiv: porting Freeciv to Python CANNED
In-Reply-To: <bu1qq3$cu440$1@ID-207230.news.uni-berlin.de>
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
	<K_YMb.10994$9k7.204413@news.xtra.co.nz>
	<bu1qq3$cu440$1@ID-207230.news.uni-berlin.de>
Message-ID: <n22Nb.11299$9k7.210522@news.xtra.co.nz>

Brandon J. Van Every wrote:
> "Peter Ashford" <me at here.there.com> wrote in message
> news:K_YMb.10994$9k7.204413 at news.xtra.co.nz...
> 
>>Brandon, don't be such an arsehole.  OS developers do things their own
>>way and offer their labour for free.  If you don't like it noone will
>>care - but don't denegrate people just because they don't do things your
>>way.
> 
> 
> I'll denigrate them all I want.  With rare exceptions, they aren't a value
> add to what I want to get done.  There's this huge cultural divide between
> hobbyists and commercialists.
> 

Why do you think OS developers owe you any kind of value at all?



From list-python at ccraig.org  Thu Jan 15 10:02:34 2004
From: list-python at ccraig.org (Christopher A. Craig)
Date: 15 Jan 2004 10:02:34 -0500
Subject: Why gmp is not in the standard library?
References: <4f0a9fdb.0401150211.615a7f45@posting.google.com>
Message-ID: <t1weku19rw5.fsf@kermit.wreck.org>

miki.tebeka at zoran.com (Miki Tebeka) writes:

> Which made me think why Python don't use gmp as it's primary math
> package - we'll get fast results, a lot of number types and much more.
> 
> Can't think of any reason why Python is implementing its own long
> numbers...  Can you enlighten me?
> 

Originally I'm sure licensing was a concern, but portability is still
a huge concern.  I haven't tried to port gmp, but from what I've heard
it's an absolute nightmare.  Python's long type, on the other hand,
was (before kmul) essentially a textbook (a Knuth text book, to be specific)
implementation of multiprecision integers.  kmul takes a couple
shortcuts, especially in cases where the two numbers are of wildly
differing sizes, but is still pretty close to textbook.  As such
longobject.c should compile pretty much anywhere with anything
resembling ANSI C with no problems.

-- 
Christopher A. Craig <list-python at ccraig.org>
Perl is worse than Python because people wanted it worse -- Larry Wall




From jcarlson at uci.edu  Wed Jan 21 16:12:04 2004
From: jcarlson at uci.edu (Josiah Carlson)
Date: Wed, 21 Jan 2004 13:12:04 -0800
Subject: Need help with Python class idioms
References: <f5c5dc88.0401211243.7e81a26b@posting.google.com>
Message-ID: <20040121131049.D8E6.JCARLSON@uci.edu>


On 21 Jan 2004 12:43:28 -0800
tad at tadland.net (Tad Marko) wrote:

> Howdy!
> 
> I'm trying to get my head around Python and I've come to realize that
> there are a lot of idioms in Python that are a bit different than in
> other languages. I have a class similar to what I've included below.
> The only difference is that in the real class, I have even more
> mandatory attributes. Too many to specify at once on a constructor and
> they don't always exist at construction time anyway, so the accessor
> idiom must remain.
> 
> Can anyone suggest a more Pythony way to do the following?
> 
> Thanks,
> Tad
> 
> #!/bin/env python
> 
> class A:
>     def __init__(self):
>         self.mandatoryVar1 = None
>         self.mandatoryVar2 = None
> 
>     def setMV1(self, mv1):
>         self.mandatoryVar1 = mv1
> 
>     def setMV2(self, mv2):
>         self.mandatoryVar2 = mv2
> 
>     def saveToDB(self, db):
>         if self.mandatoryVar1 == None:
>             raise Exception, "Mandatory Var 1 not set."
>         if self.mandatoryVar2 == None:
>             raise Exception, "Mandatory Var 2 not set."
> 
>         # Using db, do whatever saving stuff is needed.


mandatoryvariables = dict(mandatoryvar1=mv1, mandatoryvar2=mv2...)
inst = A()
inst.__dict__.update(mandatoryvariables)

That should work for you.
 - Josiah



From peter at engcorp.com  Fri Jan 16 09:28:31 2004
From: peter at engcorp.com (Peter Hansen)
Date: Fri, 16 Jan 2004 09:28:31 -0500
Subject: Binary strings, unicode and encodings
References: <265368cb.0401151138.37a3a47b@posting.google.com>
	<4006F13C.7D432B98@engcorp.com>
	<265368cb.0401151529.50c36679@posting.google.com>
Message-ID: <4007F50F.E2AF33AD@engcorp.com>

Laurent Therond wrote:
> 
> I used the interpreter on my system:
> >>> c = StringIO()
> >>> c.write('%d:%s' % (len('string?'), 'string?'))
> >>> print c.getvalue()
> 7:string?
> 
> OK
> 
> Did StringIO just recognize Extended ASCII?
> Did StringIO just recognize ISO 8859-1?
> 
> ? belongs to Extended ASCII AND ISO 8859-1.

No, StringIO didn't "recognize" anything but a simple string.  There is
no issue of codecs and encoding and such going on here, because you are
sending in a string (as it happens, one that's not 8-bit clean, but that's
irrelevant though it may be the cause of your confusion) and getting out
a string.  StringIO does not make any attempt to "encode" something that
is already a string.

> >>> print c.getvalue().decode('US-ASCII')
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> UnicodeDecodeError: 'ascii' codec can't decode byte 0x82 in position 8: ordinal
> not in range(128)
> 
> >>> print c.getvalue().decode('ISO-8859-1')
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
>   File "C:\Python23\lib\encodings\cp437.py", line 18, in encode
>     return codecs.charmap_encode(input,errors,encoding_map)
> UnicodeEncodeError: 'charmap' codec can't encode character u'\x82' in position 8
> : character maps to <undefined>
> >>>
> 
> OK
> 
> It must have been Extended ASCII, then.

Hmm... note that when you are trying to decode that string, you are
attempting to print a unicode rather than a string.  When you try to
print that on your console, the console must decode it using the default
encoding again.  I think you know this, but in case you didn't: it explains
why you got a DecodeError in the first place, but an EncodeError in the
second.  The second example worked, treating the string as having been
encoded using ISO-8859-1, and returns a unicode.  If you had assigned
it instead of printing it, you should have seen now errors.

-Peter


From jmdeschamps at cvm.qc.ca  Mon Jan 19 15:09:43 2004
From: jmdeschamps at cvm.qc.ca (jmdeschamps)
Date: 19 Jan 2004 12:09:43 -0800
Subject: Analysing Word documents (slow) What's wrong with this code
	please!
References: <3d06fae9.0401161351.75e7f5a@posting.google.com>
	<bugcnf$d5r$1@news1.wdf.sap-ag.de>
Message-ID: <3d06fae9.0401191209.7169532@posting.google.com>

"Daniel Dittmar" <daniel.dittmar at sap.com> wrote in message news:<bugcnf$d5r$1 at news1.wdf.sap-ag.de>...
> jmdeschamps wrote:
> > Anyone has a hint how else to get faster results?
> > (This is to find out what was bold in the document, in order to grab
> > documents ptoduced in word and generate html (web pages) and xml
> > (straight data) versions)
>  [...]
...
> Perhaps you can search for bold text. The Word search dialog allows this.
> And when you use the keybord macro recording feature of Word, you can
> probably figure out how to use that search feature from Python.
> 
> Daniel

Thanks Paul Prescod suggested this also, works great!

Jean-Marc


From erwin+usenet at andreasen.org  Fri Jan 30 18:10:53 2004
From: erwin+usenet at andreasen.org (Erwin S. Andreasen)
Date: Sat, 31 Jan 2004 00:10:53 +0100
Subject: Chart drawing library for Python
References: <6ee58e07.0401280403.3d52a9e0@posting.google.com>
Message-ID: <87k739xcaq.fsf@andreasen.org>

llothar at web.de (Lothar Scholz) writes:

> is there something like "JpGraph" for python ?
> For those who don't know this PHP library: It is a high level
> drawing library that generates gif files with all kind of charts.

I've used gdchart previously but these days I use ChartDirector which,
although being a commercial program ($99), was well-worth the money
for me.

It produces high-quality charts, is very flexible (e.g. you can
overlay different chart types, add custom symbols, produce HTML image
maps) and has excellent bindings for Python and many languages.

Also, I've found the support to be unusually friendly, accurate and
fast. The documentation is good enough so you won't need it much (and
customised to each language too, with something like 100 examples).

Some samples:
 http://www.advsofteng.com/gallery.html



-- 
===============================================================
<erwin at andreasen.org>                           Herlev, Denmark     
<URL:http://www.andreasen.org/>                             <*>   
===============================================================



From plucker-dev-admin at rubberchicken.org  Sat Jan 31 21:18:11 2004
From: plucker-dev-admin at rubberchicken.org (plucker-dev-admin at rubberchicken.org)
Date: Sun, 01 Feb 2004 13:18:11 +1100
Subject: Your message to plucker-dev awaits moderator approval
Message-ID: <20040201021811.14585.99614.Mailman@ike.inomial.com>

Your mail to 'plucker-dev' with the subject

    hi

Is being held until the list moderator can review it for approval.

The reason it is being held:

    Post by non-member to a members-only list

Either the message will get posted to the list, or you will receive
notification of the moderator's decision.



From jamwt at jamwt.com  Fri Jan  9 15:21:00 2004
From: jamwt at jamwt.com (J Turner)
Date: Fri, 9 Jan 2004 12:21:00 -0800
Subject: Enumerating Fonts with the win32 extensions
Message-ID: <20040109202100.GA35247@stan.jamwt.com>

Hi All,

I've googled and googled, but I can't seem to track this down
anywhere...  Point me to a thread if I've missed it.

How would one retrieve a list of all available system fonts on a win32
box using Mark Hammond's win32all extensions?

Thanks,

 - Jamie



From aahz at pythoncraft.com  Fri Jan 30 16:03:31 2004
From: aahz at pythoncraft.com (Aahz)
Date: 30 Jan 2004 16:03:31 -0500
Subject: Building a Course Management System
References: <e9570f37.0401301146.714d1551@posting.google.com>
Message-ID: <bvegr3$e73$1@panix2.panix.com>

In article <e9570f37.0401301146.714d1551 at posting.google.com>,
Graham Fawcett <graham__fawcett at hotmail.com> wrote:
>
>-- Are there other Python-based CMS (Course management systems) that
>I've overlooked? (Zope4Edu came to mind, but it's commerical, I think;
>at least, there's no public CVS that I can find.)

IIRC, there's at least one *conference* management system; I'd expect
there to be a lot of overlap between the domains.  Don't remember enough
off-hand to help you find it, though I think EuroPython uses it.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

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


From exarkun at intarweb.us  Mon Jan  5 08:11:35 2004
From: exarkun at intarweb.us (Jp Calderone)
Date: Mon, 5 Jan 2004 08:11:35 -0500
Subject: Scoped Lock
In-Reply-To: <btblv2$k7e$1@news1.wdf.sap-ag.de>
References: <bt9ovs$p92$1@graf.cs.uni-magdeburg.de>
	<3ff8a259$0$121$e4fe514c@dreader10.news.xs4all.nl>
	<btbhpt$l0l$1@graf.cs.uni-magdeburg.de>
	<btblv2$k7e$1@news1.wdf.sap-ag.de>
Message-ID: <20040105131135.GA4988@intarweb.us>

On Mon, Jan 05, 2004 at 01:40:01PM +0100, Daniel Dittmar wrote:
> Marco Bubke wrote:
> > This does not look nice to me. There should be something me easily.
> > Maybe that:
> >
> > def do_something() lock(mutex):
> >         #this stuff is locked by the mutex
> >
> > So you don't forget to release the lock.
> 
> You could create a class that locks the mutex in the constructor and unlocks
> it in the __del__ method.
> 
> class ScopedLock:
>     def __init__ (self, mutex):
>         self.mutex = mutex
>         mutex.acquire()
> 
>     def __del__ (self):
>         self.mutex.release ()
> 
> use as
> def do_something():
>     lock = ScopedLock (mutex)
>     # do something
>     # lock will be automatically released when returning
> 
> 
> This works only in the current implementation of CPython where local
> variables are usually (*) deleted when they fall out of scope.

  Notably, this fails if an exception is raised, since the lock remains in
the locals dictionary of one of the frame objects in the traceback. 
Definitely not desirable.

  Jp




From fsc at fuentez.com  Tue Jan 27 01:23:05 2004
From: fsc at fuentez.com (fsc at fuentez.com)
Date: Tue, 27 Jan 2004 01:23:05 -0500
Subject: Delivery failure notification
Message-ID: <200401270623.i0R6M3j1022784@wmsc.fuentez.com>

Your message with Subject: test 
could not be delivered to the following recipients:

hildjj at fuentez.com


Please do not resend your original message.

Delivery attempts will continue to be made for 1  day(s).




From antonmuhin at rambler.ru  Mon Jan 26 11:45:35 2004
From: antonmuhin at rambler.ru (anton muhin)
Date: Mon, 26 Jan 2004 19:45:35 +0300
Subject: Single and double asterisks preceding variables in function
	arguments
In-Reply-To: <bv3d4e$1h7$1@newshost.mot.com>
References: <bv3d4e$1h7$1@newshost.mot.com>
Message-ID: <bv3gdg$ms0sn$1@ID-217427.news.uni-berlin.de>

Stephen Boulet wrote:
> I've run across code like "myfunction(x, *someargs, **someotherargs)", 
> but haven't seen documentation for this.
> 
> Can someone fill me in on what the leading * and ** do? Thanks.
> 
> Stephen

See item 7.5 in Language Reference. In short: * declaries list of 
additional parameters, while ** declares map of additional parameters. 
Try somehting like:

	def foo(*params): print params

and

	def bar(**params): print params

to find out details.

regards,
anton.


From phil_nospam_schmidt at yahoo.com  Sun Jan  4 18:37:46 2004
From: phil_nospam_schmidt at yahoo.com (Phil Schmidt)
Date: 4 Jan 2004 15:37:46 -0800
Subject: Python for Embedded Devices?
References: <efa6f675.0401021920.3bffced0@posting.google.com>
	<vvdl0nbogvm74@corp.supernews.com>
Message-ID: <221e7b06.0401041537.2896b22d@posting.google.com>

claird at lairds.com (Cameron Laird) wrote in message news:<vvdl0nbogvm74 at corp.supernews.com>...

> The one point I'd emphasize when thinking about this
> is that "embedded devices" covers a wide range, as I
> believe you already know.  Some developers commonly
> work with hardware that's far, far more constrained
> than are cellular telephones; others, who also program
> embedded devices, can't be distinguished from vanilla
> Linux coders.

I am one such developer who works with very small systems: 8-bit
micros with under 128K flash and 4K RAM. I am keenly interested in
Python or some other similar langauge that would run on such hardware.
'C' is the usual language for such environments, but I believe that,
in many cases, using a dynamic and 'object-able' language would reduce
development time and improve product quality significantly.

I've looked at Io, Lua, PyMite and Pippy, to name a few, and none are
quite appropriate. Io is perhaps the closest match, if it were
stripped down a lot.

I have been tinkering around with some ideas to make a new language to
fit the environment I deal with. This is slow work, as I haven't a lot
of time to spend on it, and I am not a language design expert, but I'm
having fun with it!


From max at alcyone.com  Wed Jan 21 22:30:59 2004
From: max at alcyone.com (Erik Max Francis)
Date: Wed, 21 Jan 2004 19:30:59 -0800
Subject: python said : "1, 2, 3, 6, 7, manbo !"
References: <pan.2004.01.21.20.53.18.750567@address.com>
	<400F3D90.2176087B@alcyone.com>
	<slrnc0ugaj.flo.bignose-hates-spam@iris.polar.local>
Message-ID: <400F43F3.51FE9BC8@alcyone.com>

Ben Finney wrote:

> Got a pointer to somewhere that says so?  Or at least describes the
> expected behaviour for iteration over mutable types?

Tutorial, section 4.2:

http://www.python.org/doc/current/tut/node6.html#SECTION006200000000000000000

"It is not safe to modify the sequence being iterated over in the loop
(this can only happen for mutable sequence types, such
as lists). If you need to modify the list you are iterating over (for
example, to duplicate selected items) you must iterate over
a copy."

This is actually not specific to Python; in C++'s Standard Library, for
instance, there are complicated ramifications of modifying a container's
contents while you're actively maintaining and using an iterator over
it.

-- 
 __ Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
/  \ San Jose, CA, USA && 37 20 N 121 53 W && &tSftDotIotE
\__/ Isn't the best defense always a good attack?
    -- Ovid


From zensunni at rochester.rr.com  Sat Jan 24 21:45:02 2004
From: zensunni at rochester.rr.com (Brian Samek)
Date: Sun, 25 Jan 2004 02:45:02 GMT
Subject: Newbie Nested Function Problem
Message-ID: <O4GQb.12838$Tk3.10642@twister.nyroc.rr.com>

I began learning python a few days ago and just wrote the following program.
I have nested three functions together.  For some reason, the leave function
works fine when 'y' or 'n' are inputted, but it does not restart itself when
other things are inputted.  Why is this?

Thanks,

Brian Samek

# Brian Samek
# Created 01/24/2004

# This program counts down from a user-defined integer less than or equal
# to 500.

print "This program counts down from any number less than or equal to 500"
print

# ask_number gets the number from the user and then puts it into countdown

def ask_number():
    number = input("Please enter a number.\n")
    if number > 500 or number - int(number) != 0 or number < 1:
        print "Input positive integers less then 501 only, please."
 ask_number()
    else:
# countdown does the actual counting down until 0
        def countdown (number):
            if number != 0:
                print number
                number = number - 1
                countdown (number)
            else:
# leave asks the user if he wishes to exit
                def leave():
                    leave = raw_input ("Type 'y' to start over - type 'n' to
exit. ")
                    if leave == "y":
                        ask_number()
                    elif leave == "n":
                        return
                    else:
                        print "Type either 'y' or 'n' please."
                        leave()
                leave()
        countdown (number)
ask_number()




From just at xs4all.nl  Tue Jan  6 03:36:17 2004
From: just at xs4all.nl (Just)
Date: Tue, 06 Jan 2004 09:36:17 +0100
Subject: PRE-PEP: new Path class
References: <vvivefh35qjv9a@news.supernews.com>
	<mailman.118.1073338659.12720.python-list@python.org>
	<vvjt77546230f3@news.supernews.com>
Message-ID: <just-8BD65E.09361706012004@news1.news.xs4all.nl>

[Mike C. Fletcher]
> > That said, I don't mind making path it's own base-class, I just *really*
> > want to be able to pass them to path-unaware code without extra coercian
> > (otherwise switching a module to *producing* paths instead of raw
> > strings will cause the *clients* of that module to break, which is a
> > serious problem for rapid adoption).

[John Roth]
> That's an excellent point, but it begs the question of which
> string class it should subclass. Unless it's got some way of
> changing its base class depending on the system it's running
> on. That, in turn, probably violates the Principle of Least
> Astonishment.

That's in fact exactly what Jason Orendorff's path module does. But it's 
buggy due to os.path.supports_unicode_filenames being buggy.

It would be interesting to figure out to what extent non-string (and 
non-unicode) path objects can or can't be made to work for existing 
string-accepting code. I would very much prefer a path _not_ to inherit 
from str or unicode, but Mike's point is an important one. What is 
missing in Python to allow non-string objects to act like (unicode) 
strings?

Just


From frithiof.jensen at removethis.ted.ericsson.dk  Mon Jan 12 05:59:18 2004
From: frithiof.jensen at removethis.ted.ericsson.dk (Frithiof Andreas Jensen)
Date: Mon, 12 Jan 2004 11:59:18 +0100
Subject: Debugging Python
References: <mailman.215.1073656414.12720.python-list@python.org>
	<3FFEBDBC.2F9DFD03@engcorp.com>
	<xqxllohbejp.fsf@cola2.ca.boeing.com>
	<3fffbe99.486050433@news.blueyonder.co.uk>
Message-ID: <bttujd$gg9$1@newstree.wise.edt.ericsson.se>


"Alan Gauld" <alan.gauld at btinternet.com> wrote in message
news:3fffbe99.486050433 at news.blueyonder.co.uk...
> On Fri, 9 Jan 2004 10:29:46 GMT, Harry George

> Interesting comments. How do people generally perform these tests
> then?

I use the unittest module.

It is *tedious* as hell to get the test cases up and running in unittest but
I find that it always takes less time and effort in total to take the pain
up front instead of debugging "later".

Often difficulties with the test code inspires one to rethink an interface
or a design, something one would not like to do on a larger collection of
code that "almost" runs.




From mwh at python.net  Mon Jan  5 11:56:41 2004
From: mwh at python.net (Michael Hudson)
Date: Mon, 5 Jan 2004 16:56:41 GMT
Subject: Optimized quoting (was Re: Speed?)
References: <5.2.0.9.0.20040102221218.00b7c870@mail.zomething.com>
	<mailman.43.1073115353.12720.python-list@python.org>
	<bt6muh$bog$1@panix3.panix.com>
Message-ID: <m3brpi72rb.fsf@pc150.maths.bris.ac.uk>

Grr...

aahz at pythoncraft.com (Aahz) writes:

> In article <mailman.43.1073115353.12720.python-list at python.org>,
> John Hunter  <jdhunter at ace.bsd.uchicago.edu> wrote:
> >
> >Donald Knuth, God of Computer Science, said "Premature optimization is
> >the root of all evil".  
> 
> If Knuth is God, then Hoare is God's father:
> 
> "Premature optimization is the root of all evil in programming."
> --C.A.R. Hoare (often misattributed to Knuth, who was himself quoting Hoare)

Cite?

> "We should forget about small efficiencies, say about 97% of the time:
> premature optimization is the root of all evil."  --Knuth restates Hoare

This is from "Structured Programming with goto Statements", and he's
not quoting Hoare at this point.  Really!

Cheers,
mwh

-- 
  Or here's an even simpler indicator of how much C++ sucks: Print
  out the C++ Public Review Document.  Have someone  hold it about
  three feet  above your head and then drop it.  Thus  you will be
  enlightened.                                        -- Thant Tessman


From Florian.Lindner at xgm.de  Sun Jan  4 10:00:19 2004
From: Florian.Lindner at xgm.de (Florian Lindner)
Date: Sun, 04 Jan 2004 16:00:19 +0100
Subject: Find out username and UID/GID
Message-ID: <bt99it$qed$06$1@news.t-online.com>

Hello,
how can I find out the username and it's UID and GID on a linux system,
using the most recent python version? If possible, without the use of extra
libraries.
Thanks,
Florian



From okyoon at stanford.edu  Tue Jan 27 04:01:45 2004
From: okyoon at stanford.edu (Ohkyu Yoon)
Date: Tue, 27 Jan 2004 01:01:45 -0800
Subject: Newbie : innerproduct function from Numarray
References: <bv40rm$ra$1@news.Stanford.EDU>
Message-ID: <bv59ds$lhn$1@news.Stanford.EDU>

Wow! Thank you all.
My program runs super fast now.
The biggest problem was changing lists into arrays.
By starting with arrays, the program runs almost infinitely faster.

Ohkyu


"Ohkyu Yoon" <okyoon at stanford.edu> wrote in message
news:bv40rm$ra$1 at news.Stanford.EDU...
> I have two vectors that have about 2000 elements.
> I need to calculate the innerproducts of those vectors 2000 times where
> one of them cycles left(ie 1234, then 2341, then 3412, etc)
> Basically, I want to calculate A*x, where A is a left-circulant cyclic
> matrix,
> and x is a vector.
>
> I tried it two ways.
> vector1 & vector2 are lists.
>
> 1)
> from Numarray import innerproduct
> output = []
> temp = vector1 + vector1    # temp is twice the length of vector1
> for i in range(2000):
>      output.append(innerproduct(temp[i:(i+2000)],vector2)
> 2)
> output = []
> temp = vector1 + vector1
> for i in range(2000):
>     sum = 0
>     for j in range(2000):
>         sum += temp[i+j] * vector2[j]
>     output.append(sum)
>
> I thought the first method using Numarray should be faster.
> But it looks like the second method is faster.
> Am I doing anything wrong?
> Do you guys know any faster way to do this?
>
> Thank you.
>
>




From michael at foord.net  Wed Jan 28 04:25:30 2004
From: michael at foord.net (Fuzzyman)
Date: 28 Jan 2004 01:25:30 -0800
Subject: Displaying HTML Files from Python (Using Tkinter)
Message-ID: <8089854e.0401280125.57480392@posting.google.com>

Does anyone know of an 'easy' way of displaying HTML from python -
preferably using standard Tkinter widgets.

I've heard that the 'Text' widget can be used to do this - but I don't
fancy hand building an HTML parser when it's quite likely someone else
has already done it.....

I don't *need* eternal links to work, or even stylesheets or tables,
but I'd like the other basic tags to work.

I'm sure someone has built a library to do this - but I can't find it.

Anyone any clues ?

Fuzzy

--

http://www.Voidspace.org.uk The Place where headspace meets
cyberspace. Online resource site - covering science, technology,
computing, cyberpunk, psychology, spirituality, fiction and more.

--- 

http://www.voidspace.org.uk/atlantibots/pythonutils.html
Python functions - home of dateutils, ConfigObj, StandOut, CGI-News
and more....

--

Everyone has talent. What is rare is the courage to follow talent
to the dark place where it leads. -Erica Jong
Ambition is a poor excuse for not having sense enough to be lazy.
        -Milan Kundera


From nobody at nowhere.near.org  Tue Jan 13 09:57:51 2004
From: nobody at nowhere.near.org (nobody)
Date: Tue, 13 Jan 2004 14:57:51 -0000
Subject: Generate PDF or LaTeX ?
References: <bu0r5k$q7f$1@news-reader4.wanadoo.fr>
Message-ID: <40040775$0$11171$cc9e4d1f@news.dial.pipex.com>

reportlab ?

"Sinclair" <fred.duwez at freesurf.fr> wrote in message
news:bu0r5k$q7f$1 at news-reader4.wanadoo.fr...
> Hi all,
>
> I am looking for a way to generateLaTeX or PDF code from python/zope
> objects. The goal is to produce print documents.
> Does any python module exist to do that ?
>
> Thanks for your help.
>
>




From rick_muller at yahoo.com  Thu Jan 22 12:07:23 2004
From: rick_muller at yahoo.com (Rick Muller)
Date: 22 Jan 2004 09:07:23 -0800
Subject: distutils uninstall
References: <5eb8fb88.0401210822.55b60ef7@posting.google.com>
	<mailman.598.1074702856.12720.python-list@python.org>
Message-ID: <5eb8fb88.0401220907.7cd965cc@posting.google.com>

Skip Montanaro <skip at pobox.com> wrote in message news:<mailman.598.1074702856.12720.python-list at python.org>...
> Rick> I've been trying to figure out whether there are any plans to add
>     Rick> an "uninstall" feature to the Python distutils. Googling has found
>     Rick> several people posting the same question, but, to the best of my
>     Rick> knowledge, no answers.
> 
> This has been proposed before.  It's not a trivial problem though.
> Distutils would need to record all the files and directories it creates
> during installation and carefully remove stuff during the uninstall process
> (do things "backwards", not remove directories which still contain files,
> etc).  That wouldn't be foolproof though, because unlike packaging systems
> such as Red Hat's RPM, you don't have a full system picture.  What if your
> distutils-installed package provides a new version of /etc/magic?  If you
> uninstall it, /etc/magic would be deleted, since distutils couldn't tell
> that /etc/magic was actually used by many other parts of the system.
> 
> Skip

Thanks for the reply, Skip.

I actually had a simpler case in mind, that you go to the directory
from which you installed the software, and typed 'setup.py uninstall',
since the setup.py script should be able to determine which files it
originally installed, and remove them.

Certainly not foolproof, but it may be useful all the same.


From usenet-86956bd8eeb44fe359b60bcf1ff099d4 at juvonen.org  Sat Jan  3 17:07:16 2004
From: usenet-86956bd8eeb44fe359b60bcf1ff099d4 at juvonen.org (Sami Juvonen)
Date: Sat, 03 Jan 2004 22:07:16 GMT
Subject: Starting a script interactively?
References: <37d5fe8f.0401021305.349a440@posting.google.com>
Message-ID: <slrnbveeaa.dv9.usenet-86956bd8eeb44fe359b60bcf1ff099d4@kampela.juvonen.org>

On 2 Jan 2004 13:05:14 -0800,
  David Klaffenbach <google at klaff.org> blurted: 
>   Is there a way from within a python script to cause the interpreter to
>   be in interactive mode after the script finishes?
>   
>   so that if I run:
>   
>   myscript.py
>   
>   it will always execute as if I had run:
>   
>   python23.exe -i myscript.py

In Windows, create another extension mapping for python, like
.pyi and set the program to open them to something like
c:\python23\python.exe -i "%1" %* (see .pyw and py for guidance).

Then rename your script to myscript.pyi
-- 
"...you want a .sig with that?"


From jjl at pobox.com  Tue Jan 13 13:47:44 2004
From: jjl at pobox.com (John J. Lee)
Date: 13 Jan 2004 18:47:44 +0000
Subject: C++ bad-mouthing (was: Why learn Python ??)
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<7xisjh1e3i.fsf@ruckus.brouhaha.com>
	<10064loqc7sd7e3@corp.supernews.com>
	<7xeku496wx.fsf@ruckus.brouhaha.com>
	<donn-9D2291.16343412012004@nntp6.u.washington.edu>
	<40041576.D070723E@engcorp.com>
	<donn-8DC721.09485713012004@nntp6.u.washington.edu>
Message-ID: <87oet7it2n.fsf@pobox.com>

Forgot to add: what happened to all those Python interface proposals?

At least one was PEPed, wasn't it?

I suppose it's waiting for Guido-bandwidth.


John


From t_therkelsen at hotmail.com  Sat Jan  3 18:03:58 2004
From: t_therkelsen at hotmail.com (Troels Therkelsen)
Date: 03 Jan 2004 23:03:58 GMT
Subject: Lists are weird when they are instance members
References: <ffHJb.5475$HL3.4277@newssvr29.news.prodigy.com>
Message-ID: <slrnbveiit.t6.t_therkelsen@abattoir.2-10.org>

In article <ffHJb.5475$HL3.4277 at newssvr29.news.prodigy.com>, python newbie wrote:
> hey,
>  okay, I'm trying to figure out why my books: Quick Python, Python in a
> Nutshell, Python Cookbook and Learning Python don't say anything about the
> weird behavior of a list when you have one as an object instance member.
> 
> for instance (my first pun of 2004), if I have,
> 
> test.py
> ----------------
> 
>  global_filegroup_array = []  # array of filegroup objects
> 
>  class FileGroup:
>        a = 0
>        mylist = []      # here it is

mylist in this case is a class variable; what this means is that it is shared
amongst all *instances* of the class.  Only if an instance of the class rebinds
mylist is it local to the particular class instance doing this.

> 
>        def  put_stuff_in_my_list(self, anyfile):
>               self.mylist.append( get just a single string from file)   #
> pls excuse the psuedo

Because lists are mutable, when you use mylist.append(...) you don't rebind
mylist, but change its contents.  Since mylist is a class variable, this
change is available to the class as well as all instances of the class.

> 
>        def __init__(self):
>             put_stuff_in_my_list(anyfile)
> 
> def main():                         #     do ten times:  instantiate the
> above object, and add to the global array
>      for i in xrange(10):
>           filegroup = FileGroup()
>           global_filegroup_array.append(filegroup)
> 
> 
>    # print the list contents
>     print global_filegroup_array[0].mylist
> 
> ------------ end of file
> 
>   Output is:    [u'.string1', u'.string2', u'.string3' ]      # only
> u'string1' should show up
> 
>    No matter which index I use into the global array, I always get ALL of
> the strings
>    showing up. I should only get  u'string1' showing up,   and u'string2'
> if
>    I used  "[1].mylist"
> 
> 
> How I resolved it, is by slipping in
> 
>              self.mylist = []
> 
>    before
> 
>       put_stuff_in_my_list(anyfile)
> 
>  in   __init__(self)
> 
> Why should I have to empty out the list when it's a member of a newly
> instantiated object?

Because __init__() is called when a class is about to be instantiated.  You are
masking the *class variable* mylist with a local *instance variable* of the
same name.  The latter is not shared amongst all instances of the class, but
remains unique to the particular instance.

Hope this helps,

/Troels Therkelsen


From Pieter.Claerhout at Creo.com  Tue Jan  6 05:38:16 2004
From: Pieter.Claerhout at Creo.com (Pieter Claerhout)
Date: Tue, 6 Jan 2004 11:38:16 +0100 
Subject: How to I get the classname of object ?
Message-ID: <490316A24CC5D411ACD700B0D078F7F003915D48@cseexch01.cse.creoscitex.com>

Try MyClassInstance.__class__.__name__

cheers,


pieter

Creo
pieter claerhout | product support prinergy | tel: +32 2 352 2511 |
pieter.claerhout at creo.com | www.creo.com

IMAGINE CREATE BELIEVE(tm)


-----Original Message-----
From: fowlertrainer at anonym.hu [mailto:fowlertrainer at anonym.hu] 
Sent: 06 January 2004 11:31
To: python-list at python.org
Subject: How to I get the classname of object ?


Hello python-list,

  Please help me !!!

  like Delphi's obj.ClassName

  Thanx
  
-- 
Best regards,
 fowlertrainer                          mailto:fowlertrainer at anonym.hu


-- 
http://mail.python.org/mailman/listinfo/python-list



From swalters_usenet at yahoo.com  Fri Jan  9 16:36:58 2004
From: swalters_usenet at yahoo.com (Samuel Walters)
Date: Fri, 09 Jan 2004 21:36:58 GMT
Subject: Python is far from a top performer according to benchmark
	test...
References: <ryELb.238$tK2.228@amstwist00> <btn5db$2f8$1@absinth.dialog.net.pl>
Message-ID: <pan.2004.01.09.21.35.40.132608@yahoo.com>

|Thus Spake Krzysztof Stachlewski On the now historical date of Fri, 09
Jan 2004 22:13:58 +0100|

> "Carl" <phleum_nospam at chello.se> wrote in message
> news:ryELb.238$tK2.228 at amstwist00...
> 
>> I have been experimenting with numerical algorithms in Python with a
>> heavy use of the Numeric module. My experience is that Python is quite
>> fast in comparison with (and sometimes as fast as) traditional languages
>> such as C or C++.
> 
> With "heavy use of Numeric module" you were calling functions written in
> C. So how can you say that Python is fast, when C code is doing all the
> work.

Because python works best as a glue layer coordinating outside libraries
and functionality.  I think the true strength of python comes from a
one-two punch of "Fast and pretty implementation with easy interface to
lower level tools."  When python is not the right tool, we code our
solution with the right tool and then use python to glue all the right
tools together.  For numerical processing, C is the right tool, but python
is not.  Therefore, noone tried to use the wrong tool, they just used the
right tool and gave it python bindings so that python could act as a
coordinator.

I read the benchmark and I think it doesn't measure python in it's target
area.  That's like taking a world-class marathon runner and wondering why
he doesn't compete well in a figure-skating event.

Sam Walters.


-- 
Never forget the halloween documents.
http://www.opensource.org/halloween/
""" Where will Microsoft try to drag you today?
    Do you really want to go there?"""



From graham__fawcett at hotmail.com  Wed Jan 28 09:42:09 2004
From: graham__fawcett at hotmail.com (Graham Fawcett)
Date: 28 Jan 2004 06:42:09 -0800
Subject: little client + server app : has this been done?
References: <mailman.888.1075263598.12720.python-list@python.org>
	<7x1xpkk6j9.fsf@ruckus.brouhaha.com>
Message-ID: <e9570f37.0401280642.7427123c@posting.google.com>

Paul Rubin <http://phr.cx at NOSPAM.invalid> wrote in message news:<7x1xpkk6j9.fsf at ruckus.brouhaha.com>...
> Python Baby <python at hitmedia.com> writes:
> > Should I do it from scratch or is this just some well-known library I
> > don't know about?   (I searched around, of course, but couldn't find one.)
> > 
> > Thanks!
> 
> Use a web server.

Good, terse advice. ;-) 

Mr. Baby, note that Python has both HTTP server (BaseHTTPServer,
SimpleHTTPServer) and HTTP client (httplib, urllib) functionality
built into the standard library. It will definitely pay off in the
long run if you stick to open standards like HTTP instead of rolling
your own protocols.

-- Graham


From dck at gazeta.pl  Tue Jan 27 06:11:22 2004
From: dck at gazeta.pl (DCK)
Date: Tue, 27 Jan 2004 11:11:22 +0000 (UTC)
Subject: TELNET instead PING
References: <5f505344.0401260332.184d4225@posting.google.com>
	<401571B9.F9DF99D0@engcorp.com>
Message-ID: <bv5h0p$c1v$1@inews.gazeta.pl>

Peter Hansen wrote:
> Interesting, but why would you use TELNET for that?  Telnet is
> simply one of many possible protocols, whereas you need only
> open a socket to the port to see if the host is responding.
I was on some kind of Network course, where teacher said, that telnet
is better then PING. In my work i found this usefull for pinging
network. When i meet with Python, i foud TELNETLIB module and write
simply scheduled script which probe network.

> from socket import *
> s = socket(AF_INET, SOCK_STREAM)
> try:
>     s.connect((host, port))
>     print 'host connected'
>     s.close()
> except error:
>     print 'host not responding'

THX for this advice. In future i will read manual carefully :)

Greetz
Michal DCK Kaczor


From martin at v.loewis.de  Wed Jan 21 12:07:00 2004
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Wed, 21 Jan 2004 18:07:00 +0100
Subject: distutils uninstall
In-Reply-To: <5eb8fb88.0401210822.55b60ef7@posting.google.com>
References: <5eb8fb88.0401210822.55b60ef7@posting.google.com>
Message-ID: <400EB1B4.3040901@v.loewis.de>

Rick Muller wrote:
> I've been trying to figure out whether there are any plans to add an
> "uninstall" feature to the Python distutils. Googling has found
> several people posting the same question, but, to the best of my
> knowledge, no answers.

As Skip explains: no. Instead, use a bdist_ command, then use the
uninstall mechanism of the binary packaging technology (e.g. wininst,
rpm).

There are some complaints that bdist-generated packages don't properly
uninstall either (e.g. may not remove directories properly);
contributions are welcome.

Regards,
Martin



From tjreedy at udel.edu  Wed Jan 21 16:21:00 2004
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 21 Jan 2004 16:21:00 -0500
Subject: Assignment to slice
References: <mailman.604.1074712550.12720.python-list@python.org>
Message-ID: <ytednW7A9piscJPdRVn-hQ@comcast.com>


"Rich Krauter" <rmkrauter at yahoo.com> wrote in message
news:mailman.604.1074712550.12720.python-list at python.org...

Guido very intentionally made index access of items strict and slice access
of subsequences permissive.  This partly due to the difference between
items, which must exist, and subsequences, which can be empty.  It also
gives programmers a choice in some situations.  For instance, seq[0] only
works on non-empty seqs while seq[0:1] gives you a sequence with 0 or 1
items without raising an error to catch when there are 0.

> Oh well. Maybe my problem is that I'm using perl as my
> model of consistency.

How amusing ;-)

> I just need to be aware of it, and not try to write
> perl code in python. I need to learn to write python
> code in python.

Definitely.  Good insight.

Terry J. Reedy





From ferrell at diablotech.com  Thu Jan 15 13:58:13 2004
From: ferrell at diablotech.com (Robert Ferrell)
Date: 15 Jan 2004 10:58:13 -0800
Subject: Can MayaVi visualize 3D functions in an unstructured grid ?
References: <11d4728b.0401150613.1bfb4ca3@posting.google.com>
Message-ID: <73b00f0c.0401151058.526211b9@posting.google.com>

I can't answer about MayaVi.  However, I use Paraview (paraview.org). 
I use it on windows, but it's available for Linux.  It is open source.
 Works great for me.  I use it on unstructured FE meshes, among other
things.

-robert
arian.novruzi at mathstat.uottawa.ca (A. Novruzi) wrote in message news:<11d4728b.0401150613.1bfb4ca3 at posting.google.com>...
> Hi, 
> 
> I am looking for a free 3D visualization software, running in Linux,
> and able to visualize 3D functions in nonstructured mesh (basically,
> my mesh is a set of thetraheders used for some 3D FE computations).
> 
> Can anyone confirm that indeed MayaVi can visualize 3D functions in
> nonstructured mesh? I went through the manuals but I didn't find that
> MayVi can do so.
> 
> Thank you,
> Arian Novruzi


From elainejackson7355 at home.com  Sun Jan 11 23:42:42 2004
From: elainejackson7355 at home.com (Elaine Jackson)
Date: Mon, 12 Jan 2004 04:42:42 GMT
Subject: exceptions
Message-ID: <6BpMb.66656$JQ1.17722@pd7tw1no>

Could someone give me a hint regarding exceptions? Specifically, how you handle
different exceptions with different blocks of code? All I know how to do now is
to follow "raise" with a string (and even that is now deprecated, apparently).

Muchas gracias.

Peace




From aahz at pythoncraft.com  Wed Jan 21 19:53:03 2004
From: aahz at pythoncraft.com (Aahz)
Date: 21 Jan 2004 19:53:03 -0500
Subject: Accessing a shared generator from multiple threads.
References: <7934d084.0401152058.164a240c@posting.google.com>
	<7934d084.0401181805.71029c2f@posting.google.com>
	<400EE6B5.27C6B694@hotmail.com>
	<20040121131300.D8E9.JCARLSON@uci.edu>
Message-ID: <bun6tf$ir7$1@panix1.panix.com>

In article <20040121131300.D8E9.JCARLSON at uci.edu>,
Josiah Carlson  <jcarlson at uci.edu> wrote:
>
>Of course you could just as easily use a single lock and a class:
>
>class lockedgen:
>    def __init__(self, gen):
>        self.g = gen
>        self.l = threading.Lock()
>    def get(self):
>        self.l.acquire()
>        a = self.g.next()
>        self.l.release()
>        return a

This is one case where you *DEFINITELY* want to use try/finally:

class lockedgen:
    def __init__(self, gen):
        self.g = gen
        self.l = threading.Lock()
    def get(self):
        self.l.acquire()
        try:
            a = self.g.next()
        finally:
            self.l.release()
        return a
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

A: No.
Q: Is top-posting okay?


From timr at probo.com  Thu Jan 15 23:36:46 2004
From: timr at probo.com (Tim Roberts)
Date: Thu, 15 Jan 2004 20:36:46 -0800
Subject: dde
References: <8EFMb.102403$_P.3808599@news4.tin.it>
	<f3s900dhej5v8pd7dnurrpo0gl7i7v4d2k@4ax.com>
	<rSlNb.118089$_P.4278876@news4.tin.it>
Message-ID: <udqe00t28lml4kfqpi2f0k3t191e6pqg2u@4ax.com>

"Alessandro Crugnola *sephiroth*" <alessandro at sephiroth.it> wrote:
>
>"Tim Roberts" <timr at probo.com> wrote:
>>
>> What DDE app are you trying to control?
>
>macromedia Flash

That's not an app, that's a file format.  What app are you trying to
control?  I would have guessed that a fancy app like Dreamweaver, for
example, would probably be controllable by COM, which is easy in Python.
-- 
- Tim Roberts, timr at probo.com
  Providenza & Boekelheide, Inc.


From remi at cherrypy.org  Mon Jan 12 16:50:26 2004
From: remi at cherrypy.org (Remi Delon)
Date: 12 Jan 2004 13:50:26 -0800
Subject: what is best for web development??
References: <mailman.292.1073907903.12720.python-list@python.org>
Message-ID: <585c0de9.0401121350.10ced5a4@posting.google.com>

> i am developing an issue tracking system 
> the primary requirements are
> 1)it should be platform independent which i think python will take 
> care of
> 2)it should have customizeable gui .I am thinking of using templates 
> for this like Cheetah. Is there any other better solution to Cheetah?
> The problem i am facing here is i dont know what to use for 
> development of the application. I came across many ways to develop 
> web application in python which I already specified like 
> i)the cgi module in python
> ii)Python Server Pages
> iii)Quixote
> iv)WebWare
> v)Zope etc.
> I want to choose such an environment so that i dont have to install 
> other softwares to run my application.For eg. I think if I develop 
> using zope then the client also has to install zope to run my 
> software and i dont want this.

If you want something that meets your requirement and is very easy to
deploy, you can try CherryPy ...
It will generate a single executable containing everything that's needed to
run the site (including its own HTTP server).
Then all you need to install on the deployment machine is Python.
Actually, you can also freeze the script generated by CherryPy (with py2exe
for instance) and then Python isn't even required anymore ...


Remi.     remi at remove-me.python-hosting.com

----------------------
Specialized python hosting: http://www.python-hosting.com
CherryPy: http://www.cherrypy.org
Free CherryPy hosting: http://www.freecherrypy.org
----------------------


From gerrit at nl.linux.org  Sun Jan  4 12:47:19 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Sun, 4 Jan 2004 18:47:19 +0100
Subject: Proposal: new peps always in clpa
Message-ID: <20040104174719.GA16475@nl.linux.org>

Hi,

would it be a good idea to automatically sumbit all new peps to
comp.lang.python.announce? After all, each PEP is an announcement and
may be important to the entire Python community. Another possibility
would be to python-dev, but since c.l.py.announce has a broader public,
I'd prefer the first one. What do you think?

Gerrit.

-- 
201. If he knock out the teeth of a freed man, he shall pay one-third
of a gold mina.
          -- 1780 BC, Hammurabi, Code of Law
-- 
Asperger's Syndrome - a personal approach:
	http://people.nl.linux.org/~gerrit/english/



From giles_brown at hotmail.com  Sun Jan  4 05:02:57 2004
From: giles_brown at hotmail.com (Giles Brown)
Date: 4 Jan 2004 02:02:57 -0800
Subject: Cheetah best for templating?
References: <CMudnfQnOeIn1GqiRVn-uQ@comcast.com>
Message-ID: <57de9986.0401040202.65b1882f@posting.google.com>

"Roger Jack" <rjack at elegancetech.com> wrote in message news:<CMudnfQnOeIn1GqiRVn-uQ at comcast.com>...
> I have just finished reading Code Generation In Action which uses Ruby for
> code generation. I would like to use Python instead. Is Cheetah the best
> tool to use for templating source code files and then generating code? Is
> there something more mature or better?

I had a project where I wanted to generate some pro*c + C++ database code.
I found that the Python Template Language that comes with Quixote was
very convenient for this purpose, because it avoids needing to learn
another syntax.

Quixote: http://www.mems-exchange.org/software/quixote/
PTL: http://www.mems-exchange.org/software/quixote/doc/PTL.html

Regards,
Giles


From deets_noospaam at web.de  Sun Jan  4 11:34:41 2004
From: deets_noospaam at web.de (Diez B. Roggisch)
Date: Sun, 04 Jan 2004 17:34:41 +0100
Subject: how to make a code object a function
References: <bt93ds$tuv$00$1@news.t-online.com>
	<bt96ll$75c$02$1@news.t-online.com>
	<bt9cd0$t3q$01$1@news.t-online.com>
	<bt9ekh$8tt$07$1@news.t-online.com>
Message-ID: <bt9fb1$9le$07$1@news.t-online.com>

> You could provide a separate namespace and then extract only the
> callables:
> 
>>>> d = {}
>>>> exec "factor=2\ndef alpha(s, t): print factor*t" in d
>>>> d.keys()
> ['__builtins__', 'alpha', 'factor']
>>>> funcs = dict([(n,f) for n, f in d.iteritems() if callable(f)])
>>>> funcs
> {'alpha': <function alpha at 0x4029025c>}
>>>> funcs["alpha"](None, 2)
> 4

And again I learned something completely new - cool. Thanks,

Diez


From missive at frontiernet.net  Fri Jan 23 22:23:04 2004
From: missive at frontiernet.net (Lee Harr)
Date: Sat, 24 Jan 2004 03:23:04 GMT
Subject: sort profile stats by percall
Message-ID: <slrnc13out.4ds.missive@homer.easthighschool.net>


Is there an easy way to sort the stats returned from
the hotshot.Profile() by the percall column?



From newsgroups at jhrothjr.com  Sun Jan  4 17:53:33 2004
From: newsgroups at jhrothjr.com (John Roth)
Date: Sun, 4 Jan 2004 17:53:33 -0500
Subject: Let users execute but not view
References: <bt9o11$7rq$05$1@news.t-online.com>
Message-ID: <vvh6dkefoji810@news.supernews.com>

"Florian Lindner" <Florian.Lindner at xgm.de> wrote in message
news:bt9o11$7rq$05$1 at news.t-online.com...
> Hi!
> I have a python script which should be executed my normal users but they
> should not be able to view the sourcecode. Setting permissions to x only
> does not help, the python interpreter can not read the file.
> How can I do that?
> Thanks,
> Florian

You've already got the standard answers, hopefully that will do
what you need to do.

The other way is to dig into the import mechanics, paying
particular attention to how it unfreezes frozen modules,
and then arrange to decrypt your encrypted pre-compiled
modules when they have to be imported.

That's a *lot* of hassle, and I don't know of anyone
who's actually done it. Whether the work is worth
the benefit is, of course, your decision.

John Roth




From jcarlson at uci.edu  Tue Jan 20 21:14:20 2004
From: jcarlson at uci.edu (Josiah Carlson)
Date: Tue, 20 Jan 2004 18:14:20 -0800
Subject: Help, *.CHM, etc
References: <90f2d9db.0401201803.6f2adbf8@posting.google.com>
Message-ID: <20040120181009.060C.JCARLSON@uci.edu>

> A question for gui application programmers. . . 
> I 've got some GUI programs, written in Python/wxPython, and I've got
> a help button and a help menu item.  Also, I've got a compiled file
> made with the microsoft HTML workshop utility, lets call it
> c:\path\help.chm.  My question is how do you launch it from the GUI? 
> What logic do I put behind the "help" button, in other words.
> 
> I thought it would be
> 
> os.spawnv(os.P_DETACH, "c:\\path\\help.chm", [])

needs to be:

os.spawnv(os.P_DETACH, "c:\\path\\help.chm", ["c:\\path\\help.chm"])

> so I guess help.chm isn't executable itself, but is associated with
> some unknown executable.  I tried explorer.exe- at the dos cmd line it
> basically works to type

> os.spawnv(os.P_DETACH, 'explorer.exe', ["c:\\path\\help.chm"])

os.spawnv(os.P_DETACH, 'explorer.exe', ['explorer.exe', "c:\\path\\help.chm"])

> would be equivalent but it fails.  I have to believe someone out there
> in python community likes to include help.chm with their applications,
> nad there is a right way to do this.
> 
> On another note, are there pure python based help viewers that people
> use instead?  The reason I ask is that would be more portable then the
> *.chm files are.  If there is such a beast I can't find it.

Personally, I would suggest:
os.startfile("c:\\path\\help.chm")

It is documented to do exactly what you want it to do, open up the help
file with the microsoft help file viewer.

 - Josiah



From cpl.19.ghum at spamgourmet.com  Mon Jan 26 18:40:06 2004
From: cpl.19.ghum at spamgourmet.com (Harald Massa)
Date: Tue, 27 Jan 2004 00:40:06 +0100
Subject: Guardian: open source is a throwback says Jack Schofield
References: <64cff82f.0401251143.328388bd@posting.google.com>
Message-ID: <Xns947D82A6244Ccpl19ghumspamgourmet@62.153.159.134>

malcolmny_1 at lycos.com (malcolm) wrote in 
news:64cff82f.0401251143.328388bd at posting.google.com:

> Why you can't get something for nothing
> Jack Schofield Jan 22 2004

is that the "Al Jazira runs IIS 5 on Linux" Jack Schofield?




From Vincent.Raaijmakers at ge.com  Tue Jan 20 16:02:52 2004
From: Vincent.Raaijmakers at ge.com (Raaijmakers, Vincent (GE Infrastructure))
Date: Tue, 20 Jan 2004 15:02:52 -0600
Subject: adodbapi, exception/error handling question
Message-ID: <971323274247EB44B9A01D0A3B424C850558E2E3@FTWMLVEM02.e2k.ad.ge.com>

Hopefully posted on the correct newsgroup. The adodbapi group seems so quit.... 

I want to distinguish between 
1) an error in the sql statement to create a table, and 
2) when the sql is correct but the table exists in the database (and thus the create sql failed.) Is there an error that I can catch and figure out which of the above 2 scenarios occurred. 

Thanks
Vincent



From craspe at mvtools.net  Thu Jan 22 12:38:59 2004
From: craspe at mvtools.net (Chris Raspe)
Date: Thu, 22 Jan 2004 12:38:59 -0500
Subject: Program Python in VIM
In-Reply-To: <871xpsc5zf.fsf@tulip.whu.ca>
References: <871xpsc5zf.fsf@tulip.whu.ca>
Message-ID: <20040122173859.M70110@mvtools.net>

from the VIM FAQ...

30.1. Can I run a shell inside a Vim window?

Currently Vim doesn't have support for running shell and other external
commands inside a Vim window.

For more information, read

   :help shell-window

Alternatively, you can try using the Unix  "screen" utility or the 'splitvt'
program.

You can also use the vimsh plugin by Brian Sturk to run a shell in a Vim
window. To use this you need to have Vim built with python support. For
more information visit the following URL:

   http://vim.sourceforge.net/scripts/script.php?script_id=165



On Thu, 22 Jan 2004 11:17:56 -0500, Peter Wu wrote
> I'm giving vim a try to program Python. The following are the steps I
> follow to code/test a python program.
> 
> vi test.py
> [key in some python code]
> :wq
> :!python test.py
> 
> Is there any other way? I don't want to type 'python test.py' every time
> I've made any modifications. In Emacs, I can simply fire C-c C-c to fire
> the python interpreter. Thanks!
> 
> -- 
>        ,,,
>       (o o)       Peter Wu
> ---ooO-(_)-Ooo--- Powered by GNU/Linux 2.4.22
> -- 
> http://mail.python.org/mailman/listinfo/python-list







From cygnus at cprogrammer.org  Thu Jan 22 15:36:01 2004
From: cygnus at cprogrammer.org (Jonathan Daugherty)
Date: Thu, 22 Jan 2004 15:36:01 -0500
Subject: Ordered dictionary?
In-Reply-To: <leWPb.231$af7.162835@newshog.newsread.com>
References: <leWPb.231$af7.162835@newshog.newsread.com>
Message-ID: <20040122203601.GA3404@mail.theserver.ath.cx>

# I need to associate a string (key) with an integer (value). A dictionary 
# would do the job, except for the fact that it must be ordered. I also 
# need to look up the value for a specific key easily, so a list of tuples 
# wouldn't work.

As the other posts on this thread suggest, dictionaries -- by virtue
of their structure -- have no inherently meaningful ordering.  You'll
have to either sort the keys (the easy way) or design a wrapper for
the dictionary that maintains a sorted list of the dictionary's
keys and updates it as necessary (the hard way).

-- 

  Jonathan Daugherty
  http://www.cprogrammer.org

  "It's a book about a Spanish guy called Manual, you should read it."
                                                            -- Dilbert



From xx758 at cam.ac.uk  Tue Jan 20 11:52:49 2004
From: xx758 at cam.ac.uk (Xiao-Qin)
Date: Tue, 20 Jan 2004 16:52:49 +0000
Subject: Problem with TCL
Message-ID: <bujmd6$eqg$1@pegasus.csx.cam.ac.uk>

Hello, Verybody,

After I swith my Redhat 9.0 to Chinese interface, I cannot run python codes 
based on Tkinter any more, the error message is list following:

"""
[xqxia at sunflower bin]$ wish
#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?
#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?
#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?
#?#?#?#?#?#?#?usr/lib/tcl8#?#?#?#?lib/tcl8#?#?#?#?usr/librar#?#?#?librar#?
#?#?tcl8#?3/librar#?#?#?usr/share/tcl8#?#?#?#?#?P`#?#?#?#?#?#?#?#?#?#?#?#?
#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?
#?#?#?#?#?#?#?#?#?#?#?#?#?#?#?[xqxia at sunflower bin]$
"""

and 

"""
>>> from Tkinter import *
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "/usr/local/lib/python2.2/lib-tk/Tkinter.py", line 35, in ?
    import _tkinter # If this fails your Python may not be configured for Tk
ImportError: libtk.so.0: cannot open shared object file: No such file or 
directory
>>>
"""

Anybody know how to solve it?

Many thanks from,

Xiao-Qin


From mir4uu at yahoo.com  Tue Jan 20 11:44:10 2004
From: mir4uu at yahoo.com (mir nazim)
Date: 20 Jan 2004 08:44:10 -0800
Subject: Please Help Me (Re: needed PyXPCOM tutorial.)
References: <425cc8d1.0401150908.287de0d8@posting.google.com>
	<mailman.415.1074196966.12720.python-list@python.org>
	<425cc8d1.0401170903.3c331ab9@posting.google.com>
Message-ID: <425cc8d1.0401200844.f6dcf9c@posting.google.com>

mir4uu at yahoo.com (mir nazim) wrote in message news:<425cc8d1.0401170903.3c331ab9 at posting.google.com>...
> Christoph Becker-Freyseng <christoph at mmc-startup.com> wrote in message news:<mailman.415.1074196966.12720.python-list at python.org>...
> > mir nazim wrote:
> > 
> > >hi 
> > >i m in need of a PyXPCOM tutorial. it should explain using python
> > >(instead of JavaScript) for creating apps. if any body can point me to
> > >some web resources or a printed book .
> > >thankz
> > >  
> > >
> > Maybe those will help (check 3! They've some more links)
> > 
> > http://lxr.mozilla.org/seamonkey/source/extensions/python/xpcom/
> > http://www.mozilla.org/catalog/architecture/xpcom/pyxpcom/
> > http://pygecko.sourceforge.net/
> > http://xul.sourceforge.net/
> > http://luxor-xul.sourceforge.net/
> > http://www.thomas-schilz.de/MozPython/    (the downloads-dirctory 
> > contains installers for upgrading Mozilla to Python-Interpretability)
> > 
> > 
> > 
> > Christoph Becker-Freyseng
> 
> yeah i know about them all
> but what i acutally need is an indepth tutorial/guide/refrence.

Please help me  find some tutorials on pyxpcom. my project is at hold due to it.


From hans at zephyrfalcon.org  Fri Jan 23 14:10:38 2004
From: hans at zephyrfalcon.org (Hans Nowak)
Date: Fri, 23 Jan 2004 14:10:38 -0500
Subject: [OPINION] - does language really matter if they all do the same
 thing?
In-Reply-To: <20040123183127.GA35281@mail.hitmedia.com>
References: <20040123183127.GA35281@mail.hitmedia.com>
Message-ID: <401171AE.7000806@zephyrfalcon.org>

Python Baby wrote:
> Are programming languages like spoken languages, in the sense
> that they all say the same things, just using different words?

Some people think so.  I do not agree.

It depends where you're coming from, I guess.  E.g. if all you do is build 
business applications, and you spend most of you time in a GUI builder and 
calling methods on pre-made objects, then it may seem that the language doesn't 
matter.  After all, all this functionality is available in Java, VB, Delphi, 
VC++, etc.

Also, "problem X" can probably be solved in most languages, whether it be C, 
Python, Ruby, Perl, COBOL, PHP, you name it.

However, there are important differences in *how* these problems are solved. 
Creating a dictionary with a few names and phone numbers, for example, can be a 
one-liner in Python (and other high level languages), but it won't be in C.

The "level" of languages is just one aspect, though.  Programming languages are 
designed with different philosophies in mind.  For example, Python was designed 
to be very readable.  Not all languages share this design goal. :)  Other 
languages were designed to do system programming, text processing, web 
programming, to enforce "good" programming behavior, to offer programmers 
endless choices, etc.

In other words, there are many reasons to choose language X over Y, depending 
on your preferences, and on the situation at hand.  (Although there are also 
more or less objective criteria... some languages are demonstrably more concise 
and/or readable than others, others have better performance or are better 
suited to a certain task, etc.)

Personally, I've come to believe that the choice of language is *very* 
important, and not something trivial.  (I am also convinced that management 
should not impose a language on programmers, aside...)

> As I've fretted over this for way too many hours, I started wondering:
> 
> Can Ruby do something (important) that Python can't?
> Can Python do something (important) that PHP can't?
> Can PHP do something (important) that Ruby or Python can't?
> 
> Are they all just the same, and it's just a matter of taste?

I don't know enough about Ruby or PHP to make an informed statement about what 
they can do that the others cannot, but it's definitely not just a matter of 
taste.

-- 
Hans (hans at zephyrfalcon.org)
http://zephyrfalcon.org/





From mhammond at skippinet.com.au  Wed Jan 21 18:17:36 2004
From: mhammond at skippinet.com.au (Mark Hammond)
Date: Thu, 22 Jan 2004 10:17:36 +1100
Subject: Multithreaded COM server problem...
In-Reply-To: <9uvs00568u2tb2qp0lndh649d0ajdginkl@4ax.com>
References: <5a90009ufdd66okc8osajrn1a5kokp86mk@4ax.com>
	<btpug4$1oag$1@arachne.labyrinth.net.au>
	<gdv100hgp4tgnclf0c4a4nlr58npi5q3ir@4ax.com>
	<bttcff$qs1$1@arachne.labyrinth.net.au>
	<0pr700ddfdf3op14oulk7u82cthaped040@4ax.com>
	<bu7h15$2d9k$1@arachne.labyrinth.net.au>
	<et0f005fm32gh5ovq67bd2e9ihalbiaa9m@4ax.com>
	<buhmnr$s6g$1@arachne.labyrinth.net.au>
	<9uvs00568u2tb2qp0lndh649d0ajdginkl@4ax.com>
Message-ID: <bun1al$24th$1@arachne.labyrinth.net.au>

John Lull wrote:

> 1. Dig into exactly how apartment-threaded servers are supposed to be
> written in C or C++ & see how much of that is transferrable to Python.
> I'm not confident this would give me a solution, though.
...
> 3. Dig into why setting sys.coinit_flags=0 in localserver.py doesn't
> work. This is probably the right thing to do, both because I know it
> will yield a solution, and because it would solve the same issue for
> anyone else with similar needs. Unfortunately it means I have to dig
> into Python threading internals, pythoncom internals, and the whole
> COM mechanism rather more heavily than I'd hoped to.

I think these are pretty-much the same option.  The win32com extensions 
make no attempt to insulate you from these threading issues - it will 
blindly do what you ask.  In that regard, Python already acts very much 
like a C/C++ application - under the covers, we have a C++ pointer to a 
COM object, and when Python code tries to make a call, from whatever 
thread, we just make the call.  The same thing is true in reverse - we 
hand out a C++ pointer, and when an incoming call is made on that, we 
blindly call Python on that thread.

The Python GIL is in the picture, but I see no evidence it has any 
bearing in this case.  Certainly, in the simple example we started with, 
no threads were blocked waiting for this lock.

Re sys.soinit_flags - I am fairly confident that this will cause 
CoInitEx to be called with the specified flag as pythoncom is imported. 
  However, note that any exceptions raised by this function are masked 
when called implicitly during that import.  Try explicitly calling 
pythoncom.CoInitializeEx(0) near the top of localserver.py - any 
exceptions you see would also have happened for the implicit call made 
at import time.

I'd welcome any evidence that a C++ app would behave differently, and am 
keen to help you resolve (or at least explain) this for everyone's 
future benefit.

Mark.



From seanl at chaosring.org  Sun Jan  4 23:54:30 2004
From: seanl at chaosring.org (Sean R. Lynch)
Date: Sun, 04 Jan 2004 20:54:30 -0800
Subject: Creating a capabilities-based restricted execution system
In-Reply-To: <btaakg$1dul$1@nadya.doma>
References: <LmmdnUn4seDeGWuiXTWc-w@speakeasy.net> <bt788l$1pej$1@nadya.doma>
	<d7ycncKp5rket2qiXTWc-g@speakeasy.net> <bt7i9i$236v$1@nadya.doma>
	<srudnTjvU9BOH2qiRVn-uA@speakeasy.net> <bta3hv$17s1$1@nadya.doma>
	<mvScnSDrma66AWWiXTWc-g@speakeasy.net> <btaakg$1dul$1@nadya.doma>
Message-ID: <-PmcnYBHI_Sac2WiXTWc-w@speakeasy.net>

Serge Orlov wrote:
> "Sean R. Lynch" <seanl at chaosring.org> wrote in message news:mvScnSDrma66AWWiXTWc-g at speakeasy.net...
>>
>>Global *mutable* state shouldn't be shared, AFAICT.
> 
> 
> Right, I missed this simple rule. My mind is still confined by my recent
> attempt to add security by only translating bytecode without any changes
> to the interpreter.

You were translating bytecode rather than working with ASTs? That would 
be hard to maintain, considering that Zope found it too difficult to 
maintain even manipulating concrete syntax trees. Also, I don't really 
consider that I'm modifying the interpreter, I'm just giving the 
interpreter a different globals dict.

>>I believing making
>>sure no mutable state is reachable through __builtins__
> 
> 
> Are you going to create multiple __builtins__ or you're just going
> to get rid of any global objects in __builtins__? The first lets you
> handle str.encode the right way.

I'm not sure what you mean by this. I'm creating a dict for 
__builtins__, but AFAIK it's not possible for code to modify the 
__builtins__ dict other than through the name __builtins__, which starts 
with an underscore and so is invalid. All of the objects I have in 
__builtins__ right now are immutable within the restricted environment 
because they're either functions or classes.

Python modules that are imported in the restricted environment will be 
read-only and each domain will get its own copy. This should prevent 
leaks caused by two domains importing the same module and then 
performing operations that affect the state of the module. Modules will 
need to explicitly specify what names they want to export the same way 
classes do in order to prevent inadvertent leaks.

>>and having a new
>>globals dict for each security domain should be enough. Any modules that
>>are imported would need to be imported separately for each domain,
> 
> 
> Can C modules be imported more than once in CPython?

Not that I'm aware of, which is why they will need to be audited for 
mutable state and other sources of leaks and excess privilege. C modules 
that we need that have problems will get proxies the same way E has 
proxies for Swing.


From fapinkse at hotmail.com  Sun Jan 18 08:59:28 2004
From: fapinkse at hotmail.com (F.A. Pinkse)
Date: Sun, 18 Jan 2004 13:59:28 GMT
Subject: Boa: printing source in the Editor
Message-ID: <4jwOb.40507$DF4.24648@amsnews02.chello.com>

Dear Group,


Does the Editor of BOA has a print function?

If it has one, where is it placed in the menu hierarchy?

Thanks for the answers.

Frans.




From ark at acm.org  Wed Jan 14 01:35:02 2004
From: ark at acm.org (Andrew Koenig)
Date: Wed, 14 Jan 2004 06:35:02 GMT
Subject: I come not to bury C++, but to praise it...
References: <mailman.337.1074032524.12720.python-list@python.org>
Message-ID: <qq5Nb.33037$6y6.742643@bgtnsc05-news.ops.worldnet.att.net>

"John Benson" <jsbenson at bensonsystems.com> wrote in message
news:mailman.337.1074032524.12720.python-list at python.org...

> I got into Python because I took one look at C++ and saw all the
handwaving
> in the introductory O'Reilly book to the effect that "everything looks
sweet
> now, but wait until these snazzy little features interact..." and then
> started casting around for another road to OOP.

Perhaps you should cast around for a different C++ book while you're at it,
too -- maybe the one you found isn't well suited to your particular learning
style.




From nohmad at sub-port.net  Sun Jan 11 01:57:26 2004
From: nohmad at sub-port.net (Gyoung-Yoon Noh)
Date: 10 Jan 2004 22:57:26 -0800
Subject: Problem in directory working
Message-ID: <92ed2954.0401102257.565dd6f4@posting.google.com>

I've written Unix's find-like function using recursive os.listdir()
call and generator expression. It seems that error happens in
generator expression.
Below codes do not work. walk.next() generates StopIteration.
When I replace 'yield' with 'print', it works fine.

Why this does not work?
I've had successively implemented unix-find using os.path.walk().
But I want to combine recursive call and generator expressions.

Any comments are welcome.


[snip]
import os

def find(path):
    if not os.path.exists(path):
        raise StopIteration
    if os.path.isdir(path):
        for l in os.listdir(path):
            fullpath = os.sep.join((path, l))
            find(fullpath)
    else:
        yield path

if __name__=='__main__':
    #find('/home/myhome'); raise SystemExit()
    walk = find('/home/myhome')
    for i in walk:
        print i.next()


From ir4u4 at yahoo.com  Sat Jan 24 17:48:21 2004
From: ir4u4 at yahoo.com (Equis Uno)
Date: 24 Jan 2004 14:48:21 -0800
Subject: My Python cannot find wxPython
References: <692feddd.0401221457.18d40480@posting.google.com>
Message-ID: <692feddd.0401241448.447817e2@posting.google.com>

I got Boa Constructor working.

I'm not sure what the problem was so I 'wiped the slate clean'.

I downloaded  Python-2.3.3.tgz
I unpacked and installed it with this script:

#! /bin/bash

set -x
export DESTDIR=/python/
/bin/rm -rf /python
mkdir  /python
make clean
make distclean
./configure --enable-unicode=ucs4 --prefix /python --exec-prefix /python
make
make test
make install
cd /bin/
mv python pythonWhichIUsedToUse
ln -s /python/bin/python .

Next, I added these tokens to my LD_LIBRARY_PATH
/python/lib/python2.3/lib-dynload



Next, I downloaded wxPythonSrc-2.4.2.4.tar.gz

I unpacked and installed it with this script:

#! /bin/bash

set -x

export WXPREF=/python/wxPython

cd /CD/python/wxPythonSrc-2.4.2.4/

mkdir build
cd build
../configure --with-gtk \
--prefix=$WXPREF \
--enable-rpath=$WXPREF/lib \
--with-opengl \
--enable-geometry \
--enable-optimise \
--enable-debug_flag \
--with-libjpeg=builtin \
--with-libpng=builtin \
--with-libtiff=builtin \
--with-zlib=builtin 

make
make install
cd ../wxPython
/bin/python setup.py WX_CONFIG=/python/wxPython/bin/wx-config build install 

cd demo
/bin/python demo.py

Next, I added these tokens to my LD_LIBRARY_PATH /python/wxPython/lib




Next, I downloaded  boa-constructor-0.2.3.src.zip

I unzipped it.

I ran this and it worked great:
/bin/python Boa.py

-moi


From mcfletch at rogers.com  Fri Jan  9 15:08:22 2004
From: mcfletch at rogers.com (Mike C. Fletcher)
Date: Fri, 09 Jan 2004 15:08:22 -0500
Subject: Database interfacing
In-Reply-To: <xqxhdz5bdab.fsf@cola2.ca.boeing.com>
References: <mailman.225.1073663120.12720.python-list@python.org>
	<xqxhdz5bdab.fsf@cola2.ca.boeing.com>
Message-ID: <3FFF0A36.80806@rogers.com>

Harry George wrote:

>"Michael T. Babcock" <mbabcock at fibrespeed.net> writes:
>
>  
>
>>I'm working with databases (MySQL primarily) more and more with
>>Python, and having used PERL in the past for similar work, I'm
>>wondering if there are good tools for doing 'intelligent'
>>selects/inserts to/from dictionaries, etc.  For example:
>>
>>data = {'FirstName': 'Michael', 'LastName': 'Babcock', 'Age': 99}
>>lastid = db.insert('Users', data)
>>    
>>
userSchema = schema.lookupName( 'users' )
data = userSchema.itemClass(
    FirstName = 'Michael',
    LastName= 'Babcock'
    Age= 99,
)
data.insertQuery( APPLICATION.getDBConnection() )

>>... which would execute "INSERT INTO Users (FirstName, LastName, Age)
>>VALUES ('Michael', 'Babcock', 99)"
>>
>>And also helpful would be:
>>
>>data = db.query("dbname", "SELECT * FROM Users WHERE Age >= 99)")
>>    
>>
users = userSchema.query( """SELECT * FROM Users WHERE Age >= 99)""", 
APPLICATION.getDBConnection())

>>... which would return me an array of dictionary items like:
>>
>>[ {'ID': 143, 'FirstName': 'Michael' ... }, {'ID': 242, ... }, ... ]
>>    
>>
In this case, a row of wrappers around dictionaries (objects).  You can 
change what class those objects are by declaring it in the userSchema 
object.  The default ones are fairly heavy wrappers with properties for 
each field in the table, coercian of field-values to specified 
classes/types, insert/refresh/update/delete query methods, etceteras.

>You can write tools like this yourself or use existing tools.  For
>starters take a look at: http://skunkweb.sourceforge.net/PyDO/
>  
>
Or, for the code above, PyTable RDBMS Manager. 
http://pytable.sourceforge.net/ I mostly use it with PostgreSQL, but it 
does have MySQL-compatible plumbing as well.

>If you roll your own, here are some considerations:
>
>You need to synchronize the table definitions in the DBMS with the
>class definitions in python.  Some approaches start with the DBMS and
>extract the table definitions (attributes, keys, etc) for use in
>generating the needed python code.  Some start with python and define
>a list of attributes and their meta data as a class-level var for a
>class.  (I've tried both ways.)
>  
>
PyTable normally goes Python-definition -> database, but does have some 
support for reading the definition out of the database.

There are, as Harry points out, a number of such wrapper mechanisms 
available.  The biggest problem with all of them is that it's almost as 
much effort to learn and adapt them as it is to write your own.  The 
impedence mismatch between OO programming (Python) and RDBMS just 
doesn't seem to allow for a "perfect" solution to the problem, so 
instead you see a number of different approaches with different 
strengths and weaknesses.

Good luck,
Mike

_______________________________________
  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://members.rogers.com/mcfletch/






From gandalf at geochemsource.com  Mon Jan 26 15:31:41 2004
From: gandalf at geochemsource.com (Gandalf)
Date: Mon, 26 Jan 2004 21:31:41 +0100
Subject: TELNET instead PING
References: <5f505344.0401260332.184d4225@posting.google.com>
	<401571B9.F9DF99D0@engcorp.com>
Message-ID: <4015792D.8030407@geochemsource.com>


Peter Hansen wrote:

>DCK wrote:
>  
>
>>Into group-archive i found most e-mails, which touches PINGing.
>>In my work i've used TELNET for testing if host is operational.
>>Sometimes, for unknown reasons, workstation doesn't respond
>>for PINGing. But in WinNT network, all hosts has a nbsession
>>listening on port 139. I always use this script instead PING
>>command (hope, will be usefull for someone :) ):
>>    
>>
>
>Interesting, but why would you use TELNET for that?  Telnet is
>simply one of many possible protocols, whereas you need only
>open a socket to the port to see if the host is responding.
>  
>
Exactly. All you need is an open port you can check.

Note: that reason you talked about is most likely a packet filtering 
firewall. A good firewall
can block PING, Telnet, Nbsession and many others. In most cases, the 
best policy
is to lock everything by default and permit only the ones you really 
want. Firewall
rules can include source addresses too. It is possible that a computer 
do not respond
on PING and TELNET ports for you but it does for a similar request from 
another
computer. I think there is no universal way to determine if a remote 
host is alive or not.

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From bwglitch at hotpop.com  Wed Jan 21 23:32:51 2004
From: bwglitch at hotpop.com (BW Glitch)
Date: Wed, 21 Jan 2004 23:32:51 -0500
Subject: How to disable dos shell window popup for os.system call
In-Reply-To: <aa24ae0d.0401211927.7a91786@posting.google.com>
References: <aa24ae0d.0401211927.7a91786@posting.google.com>
Message-ID: <bung7b$k3d8v$1@ID-203388.news.uni-berlin.de>

Peter Gordon wrote:

> When I try to execute another program, the dos command shell window
> pops up with the application. For example:
> os.system("notepad") brings up the notepad but I also get the command
> shell window. How do I prevent command shell window to open?

You can use the Win32 extensions by Mark Hammond, as well as one of the 
os.popen (iirc, it's os.popen2). os.system is doing what it is expected, 
btw.

-- 
Glitch

http://andres980.tripod.com/

Nobody wins a war -- somebody loses.
         -- Grears (G1)


From ANTIGEN_DATA at sewelld.com  Thu Jan 29 11:49:34 2004
From: ANTIGEN_DATA at sewelld.com (ANTIGEN_DATA)
Date: Thu, 29 Jan 2004 09:49:34 -0700
Subject: Antigen found VIRUS= Win32.Mydoom.A (CA(Vet)) worm
Message-ID: <266583517F575241B30C945BF3741F1038A5FF@data>

Antigen for Exchange found myqfg.zip->myqfg.txt
.scr infected with VIRUS= Win32.Mydoom.A (CA(Vet)) worm.
The message is currently Purged.  The message, "Test", was
sent from python-list at python.org and was discovered in IMC Queues\Inbound
located at sewelld/provo/DATA.



From gerrit at nl.linux.org  Mon Jan  5 16:45:08 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Mon, 5 Jan 2004 22:45:08 +0100
Subject: PRE-PEP: new Path class
In-Reply-To: <vvivefh35qjv9a@news.supernews.com>
References: <vvivefh35qjv9a@news.supernews.com>
Message-ID: <20040105214508.GA29923@nl.linux.org>

John Roth wrote:
> Subject: PRE-PEP: new Path class

> I'm adding a thread for comments on Gerrit Holl's pre-pep, which
> can be found here:
> 
> http://tinyurl.com/2578q

I will update the Pre-PEP tomorrow based on the comments I already have
seen in this PEP. Note that it is very 'pre' and opinions expressed in
the PEP are not guaranteed to be consistent in any way ;)

I will comment on the comments later.

yours,
Gerrit.

-- 
Asperger's Syndrome - a personal approach:
	http://people.nl.linux.org/~gerrit/english/



From wxyisok at hotmail.com  Sun Jan  4 11:18:23 2004
From: wxyisok at hotmail.com (wang xiaoyu)
Date: 4 Jan 2004 08:18:23 -0800
Subject: how to use activex in wxpython with event support
References: <e4b04915.0401012215.3f6ff3fd@posting.google.com>
Message-ID: <e4b04915.0401040818.53cde28c@posting.google.com>

i have solve the problem.my solution is :since this activex(DICOM)
works fine in vb,and i know activex controls developed by vb works
fine in python,so why cant i develop an activex control which wrap
this activex(DICOM)?so i build a vb's activex project insert this
activex(DICOM) in it and delegate this control(DICOM) events into vb
control's event.

this activex developed by vb works fine in wxpython,MakeActiveXClass
works fine.

but i really dont understand why this method works,can you give me
some explanation?

best regards.

wangxiaoyu


wxyisok at hotmail.com (wang xiaoyu) wrote in message news:<e4b04915.0401012215.3f6ff3fd at posting.google.com>...
> Hello:
> i want use activex in wxpython program,but when i use MakeActiveXClass
> an exception occurs.
> 
> this is my source code dealing the DICOM ocx.I must note that in this
> program "hwtxcontrol" is a ocx developed my me use vc6,this ocx works
> fine in wxpython.
> 
> but you can see i only change this ocx with a new DICOM ocx and set up
> eventClass,
> 
> but the exception occure:
> 
> File ".\site-packages\wxPython\lib\activexwrapper.py", line 105, in
> axw__init__
>   File "D:\Py22\lib\site-packages\win32com\gen_py\3A75EE8D-8E68-43FF-A90A-E4835B9A3DBDx0x1x0.py",
> line 187, in __init__
>     cookie=cp.Advise(win32com.server.util.wrap(self,
> usePolicy=EventHandlerPolicy))
> com_error: (-2147220990, 'CONNECT_E_CANNOTCONNECT', None, None)
> 
> the ocx and the source code (in delphi) you can down at:
> 
> http://www.psychology.nottingham.ac.uk/staff/cr1/dicomcom.html
> 
> from wxPython.wx import *
> from wxPython.lib.rcsizer import RowColSizer
> import pywin.mfc.activex
> import activexwrapper,win32ui
> 
> if wxPlatform == '__WXMSW__':
>     from wxPython.lib.activexwrapper import MakeActiveXClass    
>     import win32com.client.gencache
>     import win32com.client
>     try:
>         import hwtxcontrol
>         hwtxocx=hwtxcontrol
>         #import ezdicom
>         #dicomocx=ezdicom
>         #dicomocx=win32com.client.gencache.EnsureModule("{3A75EE8D-8E68-43FF-A90A-E4835B9A3DBD}",0,1,0)
>         #dicomocx=win32com.client.Dispatch("ezDICOMax.ezDICOMX")
>         dicomocx=win32com.client.gencache.EnsureModule('{3A75EE8D-8E68-43FF-A90A-E4835B9A3DBD}',
> 0, 1, 0)
>     except:
>         raise ImportError("IE4 or greater does not appear to be
> installed.")
> 
>     class DicomControl(pywin.mfc.activex.Control, dicomocx.ezDICOMX):
>         def __init__(self):
>             pywin.mfc.activex.Control.__init__(self)
>             dicomocx.ezDICOMX.__init__(self)
>         def OnDCMmouseDown(self, X ,Y ,Button ,Shift):
>                 print "DICOM ocx Click!"
> 
>     class HwtxControl(pywin.mfc.activex.Control, hwtxocx.Hwtx):
>         def __init__(self):
>             pywin.mfc.activex.Control.__init__(self)
>             hwtxocx.Hwtx.__init__(self)
>         def OnClick(self):
>             print "hwtx click!"
> class TestPanel(wxWindow):
>     def __init__(self, parent, log, frame=None):
>         wxWindow.__init__(self, parent, -1,
>                          
> style=wxCLIP_CHILDREN|wxNO_FULL_REPAINT_ON_RESIZE)
>         sizer = wxBoxSizer(wxVERTICAL)
>         hwtxCtls=RowColSizer()
>         theClass2 = MakeActiveXClass(dicomocx.ezDICOMX,eventClass=DicomControl)
>         #theClass2 =
> MakeActiveXClass(hwtxocx.Hwtx,eventClass=HwtxControl)
>         self.ie4=theClass2(self,-1)
>         self.ie4.SetSize(wxSize(300,300))
>         #self.ie4.filename="e:\\d02.img"
>         #self.ie4.palnumber=12
>         #self.ie4.state=1
>         hwtxCtls.Add(self.ie4, row=2, col=2)
>         sizer.Add(hwtxCtls, 0, wxEXPAND)
>         self.SetSizer(sizer)
>         self.SetAutoLayout(True)
>         EVT_WINDOW_DESTROY(self, self.OnDestroy)
>     def OnDestroy(self, evt):
>         if self.ie4:
>             self.ie4.Cleanup()
>             self.ie4 = None
> 
> def runTest(frame, nb, log):
>     if wxPlatform == '__WXMSW__':
>         win = TestPanel(nb, log, frame)
>         return win
>     else:
>         dlg = wxMessageDialog(frame, 'This demo only works on MSW.',
>                           'Sorry', wxOK | wxICON_INFORMATION)
>         dlg.ShowModal()
>         dlg.Destroy()
> 
> overview = __doc__
> 
> if __name__ == '__main__':
>     class TestFrame(wxFrame):
>         def __init__(self):
>             wxFrame.__init__(self, None, -1, "ActiveX test -- Internet
> Explorer",
>                              size=(640, 480),
>                             
> style=wxDEFAULT_FRAME_STYLE|wxNO_FULL_REPAINT_ON_RESIZE)
>             self.CreateStatusBar()
>             self.tp = TestPanel(self, sys.stdout, self)
>             EVT_CLOSE(self, self.OnCloseWindow)
> 
>         def OnCloseWindow(self, evt):
>             self.tp.Destroy()
>             self.Destroy()
> 
>     app = wxPySimpleApp()
>     frame = TestFrame()
>     frame.Show(True)
>     app.MainLoop()
> 
> i am a new python programer but i was really attracted by it elegant
> code.i really want use wxpython as my framework,but if i cant use
> activeX,i will have to change to vb:(
> 
> can you help me.Best regards.
> 
> sincerely 
> 
> wangxiaoyu


From stephendotboulet at motorola_._com  Mon Jan 26 11:24:57 2004
From: stephendotboulet at motorola_._com (Stephen Boulet)
Date: Mon, 26 Jan 2004 10:24:57 -0600
Subject: Zope
In-Reply-To: <bv2j13$n4oug$1@ID-216549.news.uni-berlin.de>
References: <bv2j13$n4oug$1@ID-216549.news.uni-berlin.de>
Message-ID: <bv3f40$48q$1@newshost.mot.com>

Just wondering, it's not in /etc/init.d/zope* ?

Stephen

lenk wrote:

> Hi
> I installed zope in suse 9.0(own package).but i can t find start to 
> start the server .
> /opt/zope/ ... is it a right path ?
> 
> second problem
> Can you give an web example for python (forum,gueastbook ...)
> links pls:)
> 
> thanks for all
> 


From tim at lesher.ws  Tue Jan 20 13:27:27 2004
From: tim at lesher.ws (Tim Lesher)
Date: 20 Jan 2004 10:27:27 -0800
Subject: A lazy-committing database object with curry?
References: <b6562547.0401190845.6832a797@posting.google.com>
	<mailman.514.1074539232.12720.python-list@python.org>
Message-ID: <b6562547.0401201027.642c665d@posting.google.com>

Jp Calderone <exarkun at intarweb.us> wrote in message news:<mailman.514.1074539232.12720.python-list at python.org>...
> On Mon, Jan 19, 2004 at 08:45:45AM -0800, Tim Lesher wrote:
>   Are you sure?  How will the initial values be committed to the database,
> if you don't catch them in the modifications dict?  I guess you might be
> handling initial values somewhere else, in code you didn't post...

Yes... this class will only be working on rows that already exist in
the database--in other words, it only has to cope with updates and
deletes, not inserts.

>   Nift.  You surely don't use the full capabilities of currying here, but
> you are incurring a double function call overhead on every setattr now. 
> Here's another way to do it:
> 
>       def makeModificationFunctions(name):
>           def modget(self, value):
>               try:
>                   return self.__modifications[name]
>               except KeyError:
>                   return self.__dict__[name]
>           def modset(self, value):
>               self.__modifications[name] = value
>           return modget, modset
>       title = property(*makeModificationFunctions('title'))
>       description = property(*makeModificationFunctions('description'))

Aha.  This is what I was really looking for.  I tried it with lambdas
at first and got bitten by the expressions-only limitation.  Coming
from a C++ background, I keep forgetting about local functions...

>   Of course, you can go one step better and use a metaclass:

Wow.  That's even shinier than the currying.

>    This can be just "if self.__modifications:"

I know... explicit better than implicit and all.

>   One possible problem is failed commits.  If you're doing commits
> transactionally, and the transaction fails, your in memory objects will
> retain their now-inconsistent values while the database remains unupdated. 
> If you're not using transactions.. well that's a whole other problem :)

Yep, failed commits are handled in the 'snipped' piece of code when
they're handled at all--initially this is running against a
transactionless database, but the place is there to handle
transactions--that's why I don't clear the modifications until after
the update is made.

>   You may want to look at xsdb and atop.  Neither uses SQL, but both have
> developed pretty heavily on some of the ideas you're tinkering around with.

Thanks; I will.

-- 
Tim Lesher
<tim at lesher.ws>


From dlee at rightnow.com  Fri Jan 23 11:38:32 2004
From: dlee at rightnow.com (dustin lee)
Date: 23 Jan 2004 08:38:32 -0800
Subject: closing database connections
Message-ID: <71fd0ae5.0401230838.309e9b02@posting.google.com>

Over the years I've gotten out of the habit of explicitly closing file
objects (whether for reading or writing) since the right thing always
seems to happen auto-magically (e.g. files get written to disk with no
missing data).  I've recently started do the same thing with database
connections.  I'm wondering if anyone has had trouble with this sort
of "lazy" programming style.  My assumption is the the database
connection will get closed auto-magically when the interpreter closes.
 I'd be interested to hear if any one has been bitten by not
explicitly closing database connections and under what cirumstances. 
My main fear is that I will "run out of" database connections or in
some other way adversely affect server performance.  I'm using recent
versions of both mysql and oracle.

Thoughts?

dustin

ps.  If someone wants to try to talk me into explicitly closing files
I'd be interested to hear wisdom on that as well.


From tr at jotsite.com  Thu Jan 15 17:17:19 2004
From: tr at jotsite.com (Hoang)
Date: Thu, 15 Jan 2004 22:17:19 GMT
Subject: the thread that refused to die: I come not to bury C++,
	but to praise it...
References: <mailman.411.1074193295.12720.python-list@python.org>
Message-ID: <PjENb.11210$cO6.7827@newssvr25.news.prodigy.com>

Unfortunately there are too many C++ programmers working in the real-world.
Getting them to change their minds about their favorite language is no small
hurdle.  Additionally, there is the perception that Python is slow.  Again,
it's mindshare that is important in converting to Python.

Hoang Do
http://jotsite.com




From aa at bb.cc  Fri Jan 30 09:49:40 2004
From: aa at bb.cc (Ladvánszky Károly)
Date: Fri, 30 Jan 2004 14:49:40 GMT
Subject: Adding/removing instance members
Message-ID: <c7a48802a6e65883005f04793c14b7ca@news.meganetnews.com>

I understand instance members can be added to an object in a dynamic manner:

class Cc:
  pass

oCc=Cc()
oCc.x=10    # oCc now has a new member

What is the way to remove these instance members?
Is it possible to add a new member whose name is given by a string?

Thanks on any help,

K?roly




From jcarlson at nospam.uci.edu  Tue Jan 27 18:03:32 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Tue, 27 Jan 2004 15:03:32 -0800
Subject: Portable /dev/null?
In-Reply-To: <zQBRb.6394$Ja2.59118@nnrp1.uunet.ca>
References: <zQBRb.6394$Ja2.59118@nnrp1.uunet.ca>
Message-ID: <bv6qs6$24t$1@news.service.uci.edu>

Nicolas Fleury wrote:

> Hi everyone,
>     Is there an object in some standard library that would be the 
> portable equivalent of "file('/dev/null','w')" or do I have to create my 
> own class and object to do it?  If it doesn't exist, do you think it 
> would be a good idea to have such an object in a standard library?
> 
> Thx and Regards,
> 
> Nicolas
> 

In Windows you can open the file 'NUL' and it will work the same as 
'/dev/null' in *nix.

  - Josiah


From astrand at lysator.liu.se  Sat Jan  3 08:47:41 2004
From: astrand at lysator.liu.se (=?iso-8859-1?Q?Peter_=C5strand?=)
Date: Sat, 3 Jan 2004 14:47:41 +0100 (CET)
Subject: PEP 324: popen5 - New POSIX process module
Message-ID: <Pine.LNX.4.44.0401031442280.576-100000@aristocat.lysator.liu.se>


There's a new PEP available:

PEP 324: popen5 - New POSIX process module

A copy is included below. Comments are appreciated. 

----

PEP: 324
Title: popen5 - New POSIX process module
Version: $Revision: 1.4 $
Last-Modified: $Date: 2004/01/03 10:32:53 $
Author: Peter Astrand <astrand at lysator.liu.se>
Status: Draft
Type: Standards Track (library)
Created: 19-Nov-2003
Content-Type: text/plain
Python-Version: 2.4


Abstract

    This PEP describes a new module for starting and communicating
    with processes on POSIX systems.


Motivation

    Starting new processes is a common task in any programming
    language, and very common in a high-level language like Python.
    Good support for this task is needed, because:

    - Inappropriate functions for starting processes could mean a
      security risk: If the program is started through the shell, and
      the arguments contain shell meta characters, the result can be
      disastrous. [1]

    - It makes Python an even better replacement language for
      over-complicated shell scripts.

    Currently, Python has a large number of different functions for
    process creation. This makes it hard for developers to choose.

    The popen5 modules provides the following enhancements over
    previous functions:

    - One "unified" module provides all functionality from previous
      functions.

    - Cross-process exceptions: Exceptions happening in the child
      before the new process has started to execute are re-raised in
      the parent.  This means that it's easy to handle exec()
      failures, for example.  With popen2, for example, it's
      impossible to detect if the execution failed.

    - A hook for executing custom code between fork and exec.  This
      can be used for, for example, changing uid.

    - No implicit call of /bin/sh.  This means that there is no need
      for escaping dangerous shell meta characters.

    - All combinations of file descriptor redirection is possible.
      For example, the "python-dialog" [2] needs to spawn a process
      and redirect stderr, but not stdout.  This is not possible with
      current functions, without using temporary files.

    - With popen5, it's possible to control if all open file
      descriptors should be closed before the new program is
      executed.

    - Support for connecting several subprocesses (shell "pipe").

    - Universal newline support.

    - A communicate() method, which makes it easy to send stdin data
      and read stdout and stderr data, without risking deadlocks.
      Most people are aware of the flow control issues involved with
      child process communication, but not all have the patience or
      skills to write a fully correct and deadlock-free select loop.
      This means that many Python applications contain race
      conditions.  A communicate() method in the standard library
      solves this problem.


Rationale

    The following points summarizes the design:

    - popen5 was based on popen2, which is tried-and-tested.

    - The factory functions in popen2 have been removed, because I
      consider the class constructor equally easy to work with.

    - popen2 contains several factory functions and classes for
      different combinations of redirection.  popen5, however,
      contains one single class.  Since popen5 supports 12 different
      combinations of redirection, providing a class or function for
      each of them would be cumbersome and not very intuitive.  Even
      with popen2, this is a readability problem.  For example, many
      people cannot tell the difference between popen2.popen2 and
      popen2.popen4 without using the documentation.

    - One small utility function is provided: popen5.run().  It aims
      to be an enhancement over os.system(), while still very easy to
      use:

        - It does not use the Standard C function system(), which has
          limitations.

        - It does not call the shell implicitly.

        - No need for quoting; using a variable argument list.

        - The return value is easier to work with.

    - The "preexec" functionality makes it possible to run arbitrary
      code between fork and exec.  One might ask why there are special
      arguments for setting the environment and current directory, but
      not for, for example, setting the uid.  The answer is:

        - Changing environment and working directory is considered
          fairly common.

        - Old functions like spawn() has support for an
          "env"-argument.

        - env and cwd are considered quite cross-platform: They make
          sense even on Windows.

     - No MS Windows support is available, currently.  To be able to
       provide more functionality than what is already available from
       the popen2 module, help from C modules is required.


Specification

    This module defines one class called Popen:

        class Popen(args, bufsize=0, argv0=None,
                    stdin=None, stdout=None, stderr=None,
                    preexec_fn=None, preexec_args=(), close_fds=0,
                    cwd=None, env=None, universal_newlines=0)

    Arguments are:

    - args should be a sequence of program arguments.  The program to
      execute is normally the first item in the args sequence, but can
      be explicitly set by using the argv0 argument.  The Popen class
      uses os.execvp() to execute the child program.

    - bufsize, if given, has the same meaning as the corresponding
      argument to the built-in open() function: 0 means unbuffered, 1
      means line buffered, any other positive value means use a buffer
      of (approximately) that size.  A negative bufsize means to use
      the system default, which usually means fully buffered.  The
      default value for bufsize is 0 (unbuffered).

    - stdin, stdout and stderr specify the executed programs' standard
      input, standard output and standard error file handles,
      respectively.  Valid values are PIPE, an existing file
      descriptor (a positive integer), an existing file object, and
      None.  PIPE indicates that a new pipe to the child should be
      created.  With None, no redirection will occur; the child's file
      handles will be inherited from the parent.  Additionally, stderr
      can be STDOUT, which indicates that the stderr data from the
      applications should be captured into the same file handle as for
      stdout.

    - If preexec_fn is set to a callable object, this object will be
      called in the child process just before the child is executed,
      with arguments preexec_args.

    - If close_fds is true, all file descriptors except 0, 1 and 2
      will be closed before the child process is executed.

    - If cwd is not None, the current directory will be changed to cwd
      before the child is executed.

    - If env is not None, it defines the environment variables for the
      new process.

    - If universal_newlines is true, the file objects fromchild and
      childerr are opened as a text files, but lines may be terminated
      by any of '\n', the Unix end-of-line convention, '\r', the
      Macintosh convention or '\r\n', the Windows convention.  All of
      these external representations are seen as '\n' by the Python
      program.  Note: This feature is only available if Python is
      built with universal newline support (the default).  Also, the
      newlines attribute of the file objects fromchild, tochild and
      childerr are not updated by the communicate() method.

    The module also defines one shortcut function:

        run(*args):
            Run command with arguments.  Wait for command to complete,
            then return the returncode attribute.  Example:

                retcode = popen5.run("stty", "sane")


    Exceptions
    ----------
    Exceptions raised in the child process, before the new program has
    started to execute, will be re-raised in the parent.  Additionally,
    the exception object will have one extra attribute called
    'child_traceback', which is a string containing traceback
    information from the child's point of view.

    The most common exception raised is OSError.  This occurs, for
    example, when trying to execute a non-existent file.  Applications
    should prepare for OSErrors.

    A PopenException will also be raised if Popen is called with
    invalid arguments.


    Security
    --------
    popen5 will never call /bin/sh implicitly.  This means that all
    characters, including shell metacharacters, can safely be passed
    to child processes.


    Popen objects
    -------------
    Instances of the Popen class have the following methods:

    poll()
        Returns -1 if child process hasn't completed yet, or its exit
        status otherwise.  See below for a description of how the exit
        status is encoded.

    wait()
        Waits for and returns the exit status of the child process.
        The exit status encodes both the return code of the process
        and information about whether it exited using the exit()
        system call or died due to a signal.  Functions to help
        interpret the status code are defined in the os module (the
        W*() family of functions).

    communicate(input=None)
        Interact with process: Send data to stdin.  Read data from
        stdout and stderr, until end-of-file is reached.  Wait for
        process to terminate.  The optional stdin argument should be a
        string to be sent to the child process, or None, if no data
        should be sent to the child.

        communicate() returns a tuple (stdout, stderr).

        Note: The data read is buffered in memory, so do not use this
        method if the data size is large or unlimited.

    The following attributes are also available:

    fromchild
        A file object that provides output from the child process.

    tochild
        A file object that provides input to the child process.

    childerr
        A file object that provides error output from the child
        process.

    pid
        The process ID of the child process.

    returncode
        The child return code.  A None value indicates that the
        process hasn't terminated yet.  A negative value means that
        the process was terminated by a signal with number
        -returncode.


Open Issues

    Perhaps the module should be called something like "process",
    instead of "popen5".


Reference Implementation

    A reference implementation is available from
    http://www.lysator.liu.se/~astrand/popen5/.


References

    [1] Secure Programming for Linux and Unix HOWTO, section 8.3.
        http://www.dwheeler.com/secure-programs/

    [2] Python Dialog
        http://pythondialog.sourceforge.net/


Copyright

    This document has been placed in the public domain.



Local Variables:
mode: indented-text
indent-tabs-mode: nil
sentence-end-double-space: t
fill-column: 70
End:


-- 
/Peter ?strand <astrand at lysator.liu.se>







From pgmoscatt at optushome.com.au  Sat Jan 24 18:46:51 2004
From: pgmoscatt at optushome.com.au (Peter Moscatt)
Date: Sun, 25 Jan 2004 09:46:51 +1000
Subject: Tkinter Base Window
References: <401257c4$0$26116$afc38c87@news.optusnet.com.au>
	<buu3kj$8t9$1@news-reader2.wanadoo.fr>
Message-ID: <401303eb$0$14483$afc38c87@news.optusnet.com.au>

Thanks Salvatore for the link.

Pete


Salvatore wrote:

> Peter Moscatt wrote:
>> Ok....  I am pretty new to Python (as you may have gathered from previous
>> posts).  So now it time for another one of my ridiculous questions.... 
>> :-)
>> 
>> When using 'Tkinter', what is used as the base window to work from,
>> meaning what widget do I use to place all other widgets onto to create a
>> custom dialog ?
>> 
>> Pete
>> 
> Here you can find what you search and more ;-)
> http://www.pythonware.com/library/tkinter/introduction/
> 
> Regards
> 
> Salvatore



From mcfletch at rogers.com  Sat Jan  3 23:17:09 2004
From: mcfletch at rogers.com (Mike C. Fletcher)
Date: Sat, 03 Jan 2004 23:17:09 -0500
Subject: Parametrized inheritance
In-Reply-To: <2AJJb.725692$HS4.5422608@attbi_s01>
References: <2AJJb.725692$HS4.5422608@attbi_s01>
Message-ID: <3FF793C5.5070507@rogers.com>

Dan Bullok wrote:
...

>The inheritance looks like this: 
>    Base->MyBase
>        ->Sub->MySub
>
>But I'd really like it to look like this:
>    Base->MyBase->Sub->MySub
>
>i.e. define Sub as "class Sub(X)", where I can change X at the time of
>instantiation.  Then I could define MySub as "class MySub(Sub(MyBase))".
>(I hope that it's obvious that I'm looking for this effect, not this syntax)
>  
>
Works quite nicely in Python 2.2 with only one minor change.  In particular use of object as base for Base:

>>> class Base(object):
...     pass
... 
>>> class Sub( object ):
...     pass
... 
>>> class MyBase( Base ):
...     pass
... 
>>> class MySub( Sub, MyBase ):
...     pass
... 
>>> MySub.mro()
[<class '__main__.MySub'>, <class '__main__.Sub'>,
<class '__main__.MyBase'>, <class '__main__.Base'>,
<type 'object'>]
>>> 

You can use the super( ... ) built-in to provide really elegant support
for mix-in classes overriding base-class operations cooperatively.

BTW, you could have made Sub a sub-class of Base in the example above
and *still* had it give you the desired method-resolution-order, (a nice feature of Python's multiple-inheritance mechanism, IMO).  (I made Sub's parent object to make it clear how the inheritance works.)

You can find more information about these kinds of patterns by searching for "Mix-In Class" and/or "Multiple Inheritance".  Python 2.2 changed how multiple inheritance graphs are constructed in Python, BTW.  If you used old-style classes the mro would have been [MySub, Sub, Base, MyBase, Base] IIRC.

HTH,
Mike

_______________________________________
  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://members.rogers.com/mcfletch/






From http  Sun Jan 11 14:37:46 2004
From: http (Paul Rubin)
Date: 11 Jan 2004 11:37:46 -0800
Subject: Help with if statement
References: <d91f466b.0401102201.3709771@posting.google.com>
	<V_8Mb.56251$C87.20259@twister.socal.rr.com>
Message-ID: <7xk73y8eet.fsf@ruckus.brouhaha.com>

"Jikosan" <jikosan at myrealbox.com> writes:
> for N in range(0, 100000, 25):

For such a large list, you should xrange instead of range.  That will
use less memory.

>         c = math.sqrt(math.pow(x,2.0) + math.pow(y,2.0))

You should use "c = math.sqrt(x*x + y*y)" which is both faster and
more flexible: math.pow(x,2.0) happens to work ok here, but can throw
an error in some implementations if x is negative.

>     pi = 4.0*(onecheck*math.pow(N,-1)) 

You can say "pi = (4.0 * onecheck) / N" here.  That's faster and more
straightforward.  

> #Convert pi and N to log10 and write to a file to graph on Excel.

Why are you going to graph log(N) vs log(pi)?  Do you expect them
to have an exponential relationship?  If not, log(N) vs pi, instead
of log(pi), may make more sense.


From andre.bernemann at gmx.de  Thu Jan 15 17:08:04 2004
From: andre.bernemann at gmx.de (Andre Bernemann)
Date: 15 Jan 2004 14:08:04 -0800
Subject: Python COM Server with C++
Message-ID: <a40573e7.0401151408.341bda2a@posting.google.com>

Hi,

I have written a Python COM Server with the help of Mark Hammond's
Book Programming Python on Win32. I used the CreateObjects method in
VB to access the COM Methods and all worked fine. Unfortunately, that
is not what i really want. First I'd like to make the COM Server
accessible from C++ and as a beside product I want to use early
binding within VB with the NEW operator. I've googled around alot, but
I still have not the complete picture of what to do.

So far I think I have to create an IDL file to describe the interface
and compile it with the MIDL Compiler. There ist my first question.
What do I have to create first, the IDL file or the Python COM Server?
I'm a little bit confused about dispid's, the GUID's and naming
conventions. Do i need to make use of the makepy Utility in any way?

Do I have to modify the Python COM Server Source Code in any way or
can I use it as it is? (I can post the code here on request)

It would be great if anybody can give me information about the things
i have to do in order to make this work. Documentation links and
sample code would also be fantastic.

(I'm programming on Python 2.2 with the appropriate Windows Extensions
and Visual C++ 6.0)

Thx in advance

Andre


From warlock at eskimo.com  Fri Jan 23 23:06:41 2004
From: warlock at eskimo.com (Jim Richardson)
Date: Fri, 23 Jan 2004 20:06:41 -0800
Subject: Perl vs. Python for text manipulation (was: [OPINION] - does
	language really matter if they all do the	samething?)
References: <69A0D4AB81C51447AD6BA387782B8D64093D8A@midl-mail4.etcconnect.com>
	<028FD9F0-4E01-11D8-BB78-0003934ACDEC@zdome.net>
	<mailman.720.1074906442.12720.python-list@python.org>
	<1013o27e3nb141@corp.supernews.com>
Message-ID: <hj79e1-djr.ln1@grendel.myth>

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

On Sat, 24 Jan 2004 03:02:31 -0000,
 Cameron Laird <claird at lairds.com> wrote:
> In article <mailman.720.1074906442.12720.python-list at python.org>,
> Paul Prescod  <paul at prescod.net> wrote:
>>Dietrich Epp wrote:
>>> 
>>>...
>>I would appreciate an example of something you would do by capturing a 
>>message that cannot be done in Python.
>>
>>I rather wonder if you've illustrated the downside of flitting from 
>>language to langauge. You may think you're using a language to capacity 
>>without actually doing so. I could be wrong but perhaps even the tasks 
>>you turn to Lisp or Perl for may have easy equivalents in Python.
>>
>>  Paul Prescod
>>
>>
>
> The comparison with Perl in particular interests me.  I
> often encounter characterizations of Perl (or Ruby--I
> regard them as equivalent in this dimension) as the par-
> agon of text manipulation.  It's not, of course, as Icon
> conclusively demonstrates, at least for me; but I don't
> even see Perl as distinctly superior to Python in text
> mangling.  I recognize that Python REs can feel a bit
> cumbersome, in comparison to Perl, because they essenti-
> ally demand the extra step of explicit compilation.  Is
> that all that people mean, though, when they talk about
> Perl's superiority for text mangling?  Is there more to
> it?

Not sure about superiority. But I find perl useful for those one liners
sed/awk/grep replacements. It's nothing I'd want to use to write
anything more involved, but it's a great replacement/supplement to
tr/cut/grep/awk/sed/etc. 

On the otherhand, where I used to write bash scripts, using all or some
of the above, I tend to use python now, and am much happier for it :)


-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.4 (GNU/Linux)

iD8DBQFAEe9Rd90bcYOAWPYRAh78AKDmi4QnsEcMLfN5HqPHwUJa8ZFGNQCePZ75
Jcu7eTJUh/xAdrtt73s+UaM=
=KZM9
-----END PGP SIGNATURE-----

-- 
Jim Richardson     http://www.eskimo.com/~warlock
Microsoft gives you Windows... Linux gives you the whole house


From christianjauvin at videotron.ca  Wed Jan 21 10:33:49 2004
From: christianjauvin at videotron.ca (Christian Jauvin)
Date: Wed, 21 Jan 2004 10:33:49 -0500
Subject: newbie: prefix operator "**"
Message-ID: <wZwPb.14289$U77.998313@news20.bellglobal.com>

Hello,

I am playing with some classes in the Tkinter module
to learn some GUI basics.

One problem is that I can't figure what is the meaning
of the prefix operator "**". I'm guessing that it has
something to do with dictionnaries, but I can't find
any explanation of it in the Python doc, nor on Google.

Here is a code snipped which I would like to understand:

class AnyWidget:

     def __init__(self, master=None, cnf=None, **kw):
         if cnf is None:
             cnf = {}
         if kw:
             cnf = _cnfmerge((cnf, kw))
         fcnf = {}

Thanks!


From exarkun at intarweb.us  Fri Jan 30 22:43:38 2004
From: exarkun at intarweb.us (Jp Calderone)
Date: Fri, 30 Jan 2004 22:43:38 -0500
Subject: Tcp/ip programs in python
In-Reply-To: <bvefv5$919$3@news.service.uci.edu>
References: <bve7n1+b7ud@eGroups.com>
	<mailman.1056.1075488164.12720.python-list@python.org>
	<bvefv5$919$3@news.service.uci.edu>
Message-ID: <20040131034338.GA32302@intarweb.us>

On Fri, Jan 30, 2004 at 12:46:25PM -0800, Josiah Carlson wrote:
> Jp Calderone wrote:
> 
> >On Fri, Jan 30, 2004 at 06:27:45PM -0000, M.Dikmen wrote:
> >
> >>Do you now a source about socket programming in python? or some source
> >>codes, demo programs? i really need them
> >>
> >
> >
> >  In order of increasing relevance:
> >
> >    http://www.google.com/
> >
> >    http://www.vex.net/parnassus/
> >
> >    http://www.twistedmatrix.com/
> 
> 
> I always found http://www.python.org/doc/current/lib/module-socket.html 
> to be quite useful for the background and 
> http://www.python.org/doc/current/lib/module-asyncore.html for the 
> actual implementation.

  Those are decent sources as well, though neither provides much in the way
of "source codes" or "demo programs".  If I had to choose just one, it would
 be _UNIX Network Programming_, you know the one I mean.  Fortunately, there
is no such limitation.

  Jp



From carroll at tjc.com  Sat Jan 24 03:14:32 2004
From: carroll at tjc.com (Terry Carroll)
Date: Sat, 24 Jan 2004 08:14:32 GMT
Subject: progress bar
References: <59e5b87.0401231329.6e084d6f@posting.google.com>
Message-ID: <jaa410t0872u9su96e2inh1vdau6q1a488@4ax.com>

On 23 Jan 2004 13:29:38 -0800, mirandacascade at yahoo.com (Miranda Evans)
wrote:

>Seeking references to documentation that discuss how a python script
>can handle displaying a progress bar.  Also, if you are aware of any
>sample code that illustrates this, I'm interested in looking at that
>sample code.
>
>Are there ways to accomplish this that do not involve using a
>full-featured GUI toolkit like Tkinter or wxPython or PythonCard?

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/168639



From daniels at dsl-only.net  Fri Jan  2 14:20:00 2004
From: daniels at dsl-only.net (sdd)
Date: Fri, 02 Jan 2004 11:20:00 -0800
Subject: Conditional except: blocks
In-Reply-To: <mailman.27.1073065446.12720.python-list@python.org>
References: <mailman.27.1073065446.12720.python-list@python.org>
Message-ID: <3ff5d00c$1@nntp0.pdx.net>

Robert Brewer wrote:
> try:
>     return nextHandler(args)
> except (None, Exception)[self.trapErrors], exc:
>     if page == u'-Error':
>         raise exc
           raise # re-raises the same error with the full traceback.
>     else:
>         return self.handle_error(exc, scriptWithPath)



From noemail at noemail4u.com  Fri Jan 30 10:05:29 2004
From: noemail at noemail4u.com (Dang Griffith)
Date: Fri, 30 Jan 2004 15:05:29 GMT
Subject: Simple Database Package
References: <mailman.911.1075300017.12720.python-list@python.org>
	<8089854e.0401290034.4d57a45d@posting.google.com>
Message-ID: <444c343a820dc6204c623ffbc24651c6@news.teranews.com>

On 29 Jan 2004 00:34:37 -0800, michael at foord.net (Fuzzyman) wrote:

>I don't know what it is - but I asked a couple of questions here
>yesterday... and seem to have received a lot of help from peopel
>called Peter..... sounds suspiciously like a conspiracy to me :-)

I thought they were all named Bruce?
    --dang


From JimJJewett at yahoo.com  Thu Jan 22 11:00:25 2004
From: JimJJewett at yahoo.com (Jim Jewett)
Date: 22 Jan 2004 08:00:25 -0800
Subject: Accessing a shared generator from multiple threads.
References: <7934d084.0401152058.164a240c@posting.google.com>
	<400AB936.BA1D9D73@hotmail.com>
	<7934d084.0401181805.71029c2f@posting.google.com>
	<400EE6B5.27C6B694@hotmail.com> <bun7cn$le7$1@panix1.panix.com>
Message-ID: <cab22418.0401220800.1d5f8594@posting.google.com>

aahz at pythoncraft.com (Aahz) wrote in message news:<bun7cn$le7$1 at panix1.panix.com>...

> My point is that I haven't (yet) seen many good use cases for sharing a
> generator between threads, and I'm guessing that many people will try
> using generators inappropriately for problems that really are better
> suited to Queue.Queue.

A globally unique ID, such as:

    "What filename should I store this page under?"

The standard library has (several versions of) similar functionality 
for temporary filenames.  They aren't all threadsafe, they often 
enforce the "temporary" aspect, they run into hashing collision 
problems eventually, there is no good way to include even approximate
ordering information, etc...

The fact that these are in the standard library suggests that it is a
common use case.  The fact that there are several different versions
each with their own problems suggests that the problem is hard enough
to justify putting a good solution in the library.

-- 

-jJ  Take only memories.  Leave not even footprints.


From Z_kline at hotmail.com  Sun Jan 18 20:44:00 2004
From: Z_kline at hotmail.com (Zachary)
Date: Sun, 18 Jan 2004 17:44:00 -0800
Subject: Python Text Adventure Authoring System
Message-ID: <bufcp0$h36fj$1@ID-221199.news.uni-berlin.de>

Hello,
I've recently thought of how ideal Python is for the development of what
used to be called text adventures.  In case any of you don't know, these
were basically sort of a computer game in which the player guided the story
by typing in natural language commands, e.g. get ball.
Some popular games of the 1980's include Zork, A Mind Forever Voyaging,
among others.
I was just wondering if anyone has any module that might help in the
implementation of a text parser, something to read player commands.
My idea is to have each room, item, creature, etc.  Be represented as a
Python instance.
For example, the following code might setup a room class:
class room:
    def __init__(self, rdesc, exit):
        self.desc = rdesc
#Add Other code here

If anyone has any idea how this might be done, I would love to hear from
you.
P.S:
I have already seen another text adventure development system written in
Python, called Paws.  I thought this would be a sort of first project.




From jcarlson at nospam.uci.edu  Tue Jan 27 17:30:04 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Tue, 27 Jan 2004 14:30:04 -0800
Subject: How does compare work?
In-Reply-To: <4016A368.9050806@skynet.be>
References: <40158680$0$7044$ba620e4c@news.skynet.be>
	<mailman.821.1075160455.12720.python-list@python.org>
	<4016A368.9050806@skynet.be>
Message-ID: <bv6ote$q0$1@news.service.uci.edu>

> But silently(!) comparing apples with pears is evil. E.g. the example I 
> came across this was
> 
> thresh=raw_input('enter threshold')
> ...
> level=2
> ...
> if level > thresh :
> 
> which failed miserably. By the way, Perl does convert the string to an 
> integer silenty and, as most of the time, these Perl conversions are 
> just what one wants, so here.
> Nevertheless, I'd prefer an exception in this case since automatic 
> conversions can never be right in all circumstances.
> So this is a case where Python is a very dangerous language!

The comparison doesn't fail, it succeeds, just not the way you like.  If 
you want thresh to be an integer, perhaps you should say
thresh = int(raw_input('enter threshold'))

Perhaps one way to alleviate the problem is to have a special kind of 
input function:

def special_input(prompt, typ):
     a = None
     while a is None:
         if typ is int:
             r = '-?[0-9]+'
         #special cases for each kind of input
         a = re.search(r, raw_input(prompt))
         if a is not None:
             return typ(a.group(0))

Maybe a more fully featured set of input functions would be useful to 
include in the standard library.  Perhaps someone should write an 
example module and submit it.

  - Josiah


From nospam-deets at web.de  Fri Jan 23 07:25:36 2004
From: nospam-deets at web.de (Diez B. Roggisch)
Date: Fri, 23 Jan 2004 13:25:36 +0100
Subject: debugging
References: <88bc63c6.0401230416.7acf904c@posting.google.com>
Message-ID: <bur3n8$l0er8$1@ID-111250.news.uni-berlin.de>

Hi,

> Can someone help me out a little with Python? What do people use to
> debug Python code? I don't understand how to use the built in debugger
> and I haven't had any luck getting ddd to debug my Python programs. I
> end up falling back on inserting print statements in my code to figure
> out what's going on. This works but isn't always the fastest route to
> a solution. So, I'm just wondering what other people do.

I use print..... But if you want to have a graphical debugger, look into
eric. Actually, its much more, and if I were not so tied to xemacs key
bindings, I'd switch yesterday.

Diez


From skip at pobox.com  Thu Jan 15 10:08:12 2004
From: skip at pobox.com (Skip Montanaro)
Date: Thu, 15 Jan 2004 09:08:12 -0600
Subject: MySQLdb
In-Reply-To: <bu5uhr$t4$1@news.onet.pl>
References: <bu5uhr$t4$1@news.onet.pl>
Message-ID: <16390.44252.184363.369912@montanaro.dyndns.org>


    Lukas> I want add the new record to Mysql database. When I use my script
    Lukas> I got an exception "UnicodeEncodeError: 'ascii' codec can't
    Lukas> encode character u'\xe4' in position 12: ordinal not in
    Lukas> range(128).

Lukas,

You will need to encode your Unicode objects before stuffing the resulting
strings into MySQL.  For example:

    utf8foo = foo.encode("utf-8")
    c.execute("insert into blah blah blah", (..., utf8foo, ...))

instead of 

    c.execute("insert into blah blah blah", (..., foo, ...))

Skip



From gerrit at nl.linux.org  Sat Jan 24 05:07:25 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Sat, 24 Jan 2004 11:07:25 +0100
Subject: efficient matching of elements a list
In-Reply-To: <pkqQb.2735$KU5.1436@nwrddc02.gnilink.net>
References: <pkqQb.2735$KU5.1436@nwrddc02.gnilink.net>
Message-ID: <20040124100725.GA21063@nl.linux.org>

> What is the fastest way in python to get out all the tuples from the 
> list whose first element  is equal to i?

Use a list comprehension:
>>> L = [(1,2,3), (2,3,1), (3,2,1), (1,2,5), (5,1,3)]
>>> [t for t in L if t[0] == 1]
[(1, 2, 3), (1, 2, 5)]

yours,
Gerrit.



From tim.golden at viacom-outdoor.co.uk  Tue Jan 13 06:30:41 2004
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Tue, 13 Jan 2004 11:30:41 -0000
Subject: How to intercept a keypress using python?
Message-ID: <F1921F85572CB04D9F55B14BDC76B3E44345F4@tdi_nt9.internal.viacom-outdoor.co.uk>


>-----Original Message-----
>From: teengo at yahoo.com [mailto:teengo at yahoo.com]
>Sent: 12 January 2004 17:51
>To: python-list at python.org
>Subject: How to intercept a keypress using python?
>
>
>Hello all,
>
>Does anyone know how to intercept user's keypress or 
>mouseclick in Python?
>I'd like to write a small tool (Python-based preferrably) running on
>Windows to capture the user's keypresses and mouseclicks and write 
>them to a file.
>
>Thanks for your help.
>-- 

Check out:
http://mail.python.org/pipermail/python-list/2003-November/195739.html

TJG


________________________________________________________________________
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From frithiof.jensen at removethis.ted.ericsson.dk  Tue Jan 13 04:48:13 2004
From: frithiof.jensen at removethis.ted.ericsson.dk (Frithiof Andreas Jensen)
Date: Tue, 13 Jan 2004 10:48:13 +0100
Subject: Debugging Python
References: <mailman.215.1073656414.12720.python-list@python.org>
	<3FFEBDBC.2F9DFD03@engcorp.com>
	<xqxllohbejp.fsf@cola2.ca.boeing.com>
	<3fffbe99.486050433@news.blueyonder.co.uk>
	<4002AE9B.C51448FB@engcorp.com>
Message-ID: <bu0eq4$pqt$1@newstree.wise.edt.ericsson.se>


"Peter Hansen" <peter at engcorp.com> wrote in message
news:4002AE9B.C51448FB at engcorp.com...

> ...., as it takes me only about twenty seconds to start a
> new test file and that's *without* using a template.

....in twenty seconds you can just about write "import unittest" ;-)

I find that a simple module will need about three to five tests for each
method in each class and probably some test data as well often yielding in
total *more* lines of test code than the module I want to test.

It is simple, stupid & boring code but still lines that have to be typed and
debugged.

*That* is tedious work. Always will be.

The benefit comes later - when improving and extending the module one can
immediately see if it breaks and also I find that if one cannot think of an
obvious way of testing some class/method/unit it is usually because the
interface is stupid and needs a redesign.

The real fun with unittest starts when using "other peoples code": I wrote
an accounts database module based on pySqlite for a horse racing program I
am (still!) writing for fun. That was not at all easy to get to run in such
a way as one could test the database functions properly with unittest. There
is a lot of massaging of data to test that the queries work as intended and
manual work to design SQL data that will yield simple tests.

OTOH I am pretty confident the implementation actually works and I even
think I understand the kinks in pySqlite's implementation of the python
database API too ;-).




From __peter__ at web.de  Sat Jan 24 17:11:17 2004
From: __peter__ at web.de (Peter Otten)
Date: Sat, 24 Jan 2004 23:11:17 +0100
Subject: nested class problem
References: <4012d34f$0$17124$626a54ce@news.free.fr>
Message-ID: <buuqcr$m3i$06$1@news.t-online.com>

Stephane Ninin wrote:

> I am trying to play with nested class in a script I am making,
> and I am not sure I really understand how they work.

[..]
>     
> class _PTest(ITest):
> 
>     class _PHandler(object):
>         
>         def __init__(self):
>             super(_PHandler,self).__init__()

Make that
              super(_PTest._PHandler, self).__init__()

or, even better, omit it entirely. Python class hierarchies tend to remain
flat, because inheritance is only necessary for code reuse, not to indicate
a particular interface.

>             #self.__map={}
> 
>         def test(self):
>             pass
>         
>     def __init__(self):
>         super(_PTest,self).__init__()
> 
> 
>     def read(self,filename):
>         super(_PTest,self).read(filename)
>         print "HERE"
>         print dir()
>         print dir(self)
>         print self.__class__
>         print dir(self.__class__)
>         dh = self._PHandler()
>         #dh.test()
> 
> if __name__=='__main__':
> 
>     a=ITest.make_reader()
>     print dir(a)
>     b=a.read("")
>     print b
>     
> 
> 
> 
> I want to put class _PHandler in _Ptest,
> and use _PHandler in _Ptest methods,
> but anything I try doesnot work...

I think that's you fighting against the language and - a rare case - python
fighting back :-)

> 
> On this configuration, I have:
> Traceback (most recent call last):
>   File "./test.py", line 58, in ?
>     b=a.read("")
>   File "./test.py", line 51, in read
>     dh = self._PHandler()
>   File "./test.py", line 34, in __init__
>     super(_PHandler,self).__init__()
> NameError: global name '_PHandler' is not defined
> 
> and I have similar problems if I try to access _PHandler
> in different ways...
> Is this possible somehow ? Or what is the problem with my approach ?
> I know I could just dont use nested classes.., but I'd like to try.

I fail to see the benefit of nested classes. If you want to bring some
structure into your python application, try packages instead.

Peter


From michael at foord.net  Wed Jan 21 09:04:30 2004
From: michael at foord.net (Fuzzyman)
Date: 21 Jan 2004 06:04:30 -0800
Subject: Python Email Packages
Message-ID: <8089854e.0401210604.4d041ea3@posting.google.com>

I've started to learn CGI programming with Python.... and despite a
few problems with 'internal server errors' (one hour to debug a 1k
file - but now  I understand thigns a bit better !!) I'm enjoying it !

We have quite a restrictive firewall and internet policy here at work
- as you can tell by the fact that I'm posting from google :-)

I'm trying to build a CGI newsreader using python (assisted by the
fact that www.xennos.com offers free hosting with Python 2.2 woohay
:-) and actually having some success ! I'll build a python client for
my desktop as well.... nice. ( www.voidspace.xennos.com for the curios
- but there isn't a lot there yet).

What I would also like is a package that will interface with my CGI
scripts via email - and respond by email... is there a nice python
e-mail management package that anyone can reccomend me ??

Sorry if the question is dumb... I haven't done a lot of  research
into this yet.......


Fuzzy


-- 

http://www.Voidspace.org.uk The Place where headspace meets
cyberspace. Online resource site - covering science, technology,
computing, cyberpunk, psychology, spirituality, fiction and more.
---
http://www.atlantibots.org.uk
http://groups.yahoo.com/group/atlantis_talk/
Atlantibots - stomping across the worlds of Atlantis.
Building with Python - programming language that rules the world.
---
http://www.fuchsiashockz.co.uk  
http://groups.yahoo.com/group/void-shockz
---

Everyone has talent. What is rare is the courage to follow talent
to the dark place where it leads. -Erica Jong
Ambition is a poor excuse for not having sense enough to be lazy.
        -Milan Kundera


From jcollins_boulder at earthlink.net  Wed Jan 14 10:53:51 2004
From: jcollins_boulder at earthlink.net (Jeffery D. Collins)
Date: Wed, 14 Jan 2004 08:53:51 -0700
Subject: FRPythoneers Meeting -- January 19, 2004
Message-ID: <4005660F.2010004@earthlink.net>

January 19, 2004, 7:00PM at Level 3 Communications in Broomfield, CO.

Title:  Jython, the best of both worlds or the lowest common denominator
Author:  Demian L. Neidetcher

Abstract:
Python is a language that this choir knows has many great features.  
Admittedly, Java has some benefits that Python doesn't; it has great 
momentum behind it and it has a good install base.  

Jython allows us to take advantage of the usability and rapid 
development of Python as well as being able to use popular Java class 
libraries and take advantage of the popularity of the Java Virtual Machine.

I'd like to talk at a high level about where using Jython makes sense 
and also discuss some caveats that Jython introduces.  I'll show how to 
build Jython code with Ant (the Java build tool), some freebies that 
Jython gives you when dealing with the Java APIs.  I'll also show a few
comparisons of functionally equivalent Java and Jython code.


===================================================================
Meeting Information - http://fr.co.us.pythoneers.org/meetings.html

Driving Directions -

 From US36, exit at the 96th Street exchange (also
marked Interlocken Blvd) and head south (towards the new Flatirons
Mall.)

Alternatively, if you are coming from the south and want to avoid the
construction on Hwy 36... come up Hwy 93, Indiana, or Wadsworth. Turn
onto Hwy 128 (east from 93 or Indiana, west from Wadsworth just before
36). Then turn north on 96th (not Interlocken) and continue below.

 From 96th Street turn west (or right - away from the Sun campus) onto
Eldorado Blvd.

The entrance to the conference room is in Building 2000. These doors
will be locked, so arrive shortly before 7pm to ensure entry. Proceed
upstairs to the second conference room on your right.


--
Jeffery Collins




From http  Fri Jan  9 21:03:24 2004
From: http (Paul Rubin)
Date: 09 Jan 2004 18:03:24 -0800
Subject: Databases: Which one's right for me?
References: <4378fa6f.0401091717.1ae63541@posting.google.com>
Message-ID: <7xad4wef0z.fsf@ruckus.brouhaha.com>

What do you need to do with the database?  For a lot of standalone
applications, one of the standard Python dbm modules is good enough.


From bmgx_no_sp at mgleesonprop.co.za  Tue Jan  6 14:35:03 2004
From: bmgx_no_sp at mgleesonprop.co.za (bmgx)
Date: Tue, 06 Jan 2004 21:35:03 +0200
Subject: using cgi form via http and extracting results
In-Reply-To: <3ffaf37b.0@news1.mweb.co.za>
References: <3ff84844.0@news1.mweb.co.za>
	<ca4kvvskfmi3mm69t6hq8u8tkmch84jsv1@4ax.com>
	<slrnbvk5vu.js6.bignose-hates-spam@iris.polar.local>
	<3ffaf37b.0@news1.mweb.co.za>
Message-ID: <3ffb0dde.0@news1.mweb.co.za>

Ok it's done right..

import urllib
a = urllib.urlopen("http://www.suckerservice.com/convert.cgi", 
"Amount=1&From=EUR&To=USD")
b = a.readlines()
c = open("tempresult.html","w")

i = 0
d = "********* local copy ******\n\n"
while i < len(b):
     d = d + b[i]
     i = i + 1

c.write(d)
c.close()
a.close()

bmgx wrote:

> How would one "create" post data so that I can skip the html form and 
> access the submission script (in <form method="POST" action="SCRIPT">) 
> directly. This is simple if the script uses GET as mentioned, but 
> unfortunately this is not the case which is the very reason for my 
> dilemma..
> 
> Ben Finney wrote:
> 
>> On Mon, 05 Jan 2004 17:39:30 -0800, Tim Roberts wrote:
>>
>>> bmgx <bmgx_no_sp at mgleesonprop.co.za> wrote:
>>>
>>>> 1) Make an http connection to the remote script 
>>>> (http://server/script.cgi)
>>>> 2) Fill out the html form (1x TEXT and 2x SELECT input fields)
>>>> 3) Submit the form
>>>> 4) extract the actual returned result. (using regex or something..)
>>>
>>>
>>> You don't actually need steps 1 and 2 at all.
>>
>>
>>
>> True.
>>
>>
>>> HTTP transactions are all completely separate.
>>
>>
>>
>> True (ignoring cookies for now).
>>
>>
>>> The results of a form submission are just a URL.
>>
>>
>>
>> Usually false.
>>
>> The result of most form submissions is an HTTP POST request, which
>> contains the URL and form content as separate data.
>>
>>
>>> If the form has fields "FromCurrency", "ToCurrency", and "Amount", all
>>> you have to do is this:
>>>
>>> http://www.currencyservice.com?FromCurrency=dollars&ToCurrency=pounds&Amount=15 
>>>
>>
>>
>>
>> This is only true if the form action is an HTTP GET request, which is a
>> rather insecure and ugly way to submit form data, and makes it
>> impossible to submit many kinds of data.  HTTP POST is the recommended
>> method for submitting data to a CGI script.
>>
>>
>>> You don't have to HAVE the form source in order to submit a request.
>>
>>
>>
>> True.  You just need to construct the HTTP POST request correctly.
>>
> 



From wolfoxbr at hotmail.com  Thu Jan 15 07:37:01 2004
From: wolfoxbr at hotmail.com (Roberto Amorim)
Date: Thu, 15 Jan 2004 10:37:01 -0200
Subject: Python used in Freedom Force
References: <4BDF2B3C-464A-11D8-B48D-000A959CB2EC@netmail.to>
Message-ID: <bu61go$aao$1@sea.gmane.org>

Not only Freedom Force, but also Severance: Blade of Darkness (3rd-person
action medieval game) and Bridge Commander (Star Trek TNG simulator).

> I don't know if it's been discussed since the game came out a while
> ago, but I was looking through some temp files that were installed with
> the game Freedom Force (a very fun game) and the scenarios are
> programmed in Python! (This is on the Mac, but I assume it also used
> Python on the PC.)






From jcarlson at nospam.uci.edu  Sun Jan 25 19:59:39 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Sun, 25 Jan 2004 16:59:39 -0800
Subject: any news client in Python?
In-Reply-To: <1075055910.305663@yasure>
References: <2b4c49e0.0401230915.3438810f@posting.google.com>
	<4de76ee2.0401241125.45e77f9e@posting.google.com>
	<1075055910.305663@yasure>
Message-ID: <bv1otr$ctl$1@news.service.uci.edu>

> That's my story too, but the way I deal with it is to present my
> BeOS newsreader and IMAP email reader as a demo application for the
> widget set, hence a built-in excuse for its lameness.  I never even
> got around to the "add group" interface you show there.  A really good
> newsreader is a lot of work (and of course its users are by definition
> the USENET crowd, not people you want to have to deal with!)  But it
> wasn't much of an issue, because each BeOS user tended to write his
> own newsreader for some reason - much easier to tolerate the defects
> of your own software, I suppose.

Heh.  I had been using a plugin that allowed my email software to do 
news...except the plugin was buggy and crashed every 2-3 posts to 
newsgroups.  I was contemplating writing my own (wxPython's treectrl 
would have been perfect for threading, as would a dict for properly 
looking up 'in reply to' posts, but I digress), until I decided to give 
Mozilla Thunderbird a shot.  Damn.  Thunderbird is the best news reader 
I've had the opportunity to use.  I'm even contemplating tossing my old 
email client, even though I have around 100 filters for filtering email 
from certain people.

My only complaint is that it can be a little laggy on a PII-400.  I can 
deal.

  - Josiah


From kyo at netease.com  Mon Jan  5 02:49:35 2004
From: kyo at netease.com (kyo)
Date: 4 Jan 2004 23:49:35 -0800
Subject: Why exception is not newstyle class?
Message-ID: <2f9c31f.0401042349.3eea0e9b@posting.google.com>

class A(Exception):
	
	def __init__(self, n):
		self.test = n

(1) :

class B(A):
	
	def __init__(self, n):
		#A.__init__(self, n)
		super(B, self).__init__(n)
		self.testb = n
	
try:
	raise B, B(1)
except A, a:
	print dir(a)
	
=============================
(2):
	
class B(object):
    pass
class C(B):
    pass
class D(C):
    pass


for c in [B, C, D]:
    try:
        raise c()
    except D:
        print "D"
    except C:
        print "C"
    except B:
        print "B"

================================

I want to use new style class, how to do that?
If I can't, Why?


From jepler at unpythonic.net  Mon Jan 12 11:49:41 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Mon, 12 Jan 2004 10:49:41 -0600
Subject: Moving widgets in Tkinter
In-Reply-To: <vozMb.5076$i4.657@newsread1.news.atl.earthlink.net>
References: <qVgMb.3119$q4.2242@newsread3.news.atl.earthlink.net>
	<bttono$241$1@news-reader2.wanadoo.fr>
	<vozMb.5076$i4.657@newsread1.news.atl.earthlink.net>
Message-ID: <20040112164941.GG2810@unpythonic.net>

I've embellished your program a little bit ...

from Tkinter import *

def clamp(lo, hi, x):
        return min(max(x, lo), hi)

class blah:
    all = []
    def MoveWindowStart(self, event):
        self.move_lastx = event.x_root
        self.move_lasty = event.y_root
        self.focus()
    def MoveWindow(self, event):
        self.root.update_idletasks()

        dx = event.x_root - self.move_lastx
        dy = event.y_root - self.move_lasty
        self.move_lastx = event.x_root
        self.move_lasty = event.y_root
        self.x = clamp(0, 640-200, self.x + dx) # should depend on
        self.y = clamp(0, 480-200, self.y + dy) # actual size here
        self.f.place_configure(x=self.x, y=self.y)

    def __init__(self, root, title, x, y):
        self.root = root
        
        self.x = x; self.y = y
        self.f = Frame(self.root, bd=1, relief=RAISED)
        self.f.place(x=x, y=y, width=200, height=200)

        self.l = Label(self.f, bd=1, bg="#08246b", fg="white",text=title)
        self.l.pack(fill=X)

        self.l.bind('<1>', self.MoveWindowStart)
        self.f.bind('<1>', self.focus)
        self.l.bind('<B1-Motion>', self.MoveWindow)
#        self.f.bind('<B1-Motion>', self.MoveWindow)
        self.all.append(self)
        self.focus()

    def focus(self, event=None):
        self.f.tkraise()
        for w in self.all:
                if w is self:
                        w.l.configure(bg="#08246b", fg="white")
                else:
                        w.l.configure(bg="#d9d9d9", fg="black")
      
       

root = Tk()
root.title("...")
root.resizable(0,0)
root.geometry("%dx%d%+d%+d"%(640, 480, 0, 0))
x = blah(root, "Window 1", 10, 10)
y = blah(root, "Window 2", 220, 10)
y = blah(root, "Window 3", 10, 220)
root.mainloop()



From james at logicalprogression.net  Wed Jan 28 09:44:34 2004
From: james at logicalprogression.net (James Henderson)
Date: Wed, 28 Jan 2004 14:44:34 +0000
Subject: r prefix bug ... or my lack of understanding?
In-Reply-To: <bv8gtj$5ob$1@ngspool-d02.news.aol.com>
References: <bv8gtj$5ob$1@ngspool-d02.news.aol.com>
Message-ID: <200401281444.34472.james@logicalprogression.net>

On Wednesday 28 January 2004 2:27 pm, Bill Sneddon wrote:
> Below is from python 2.3.3 on windows.
> I have tryed on Pythonwin and Idle and on
> a Solaris unix build 2.2.2.
>
> I know there are work arounds but the behavior
> seems a bit strange to me.
>
>  >>> path = r'c:\data'   #this is fine
>  >>> print path
>
> c:\data
>
>  >>> path = r'c:\data\'
>
> Traceback (  File "<interactive input>", line 1
>      path = r'c:\data\'
>                       ^
> SyntaxError: EOL while scanning single-quoted string
>
>  >>> path = r'c:\data\\'
>  >>> print path
>
> c:\data\\

Fuether to my last post the full details are at:

http://www.python.org/doc/current/ref/strings.html

>From which I quote:

r"\" is not a valid string literal (even a raw string cannot end in an odd 
number of backslashes). Specifically, a raw string cannot end in a single 
backslash (since the backslash would escape the following quote character)

J.
-- 
James Henderson, Logical Progression Ltd.
http://www.logicalprogression.net/
http://sourceforge.net/projects/mailmanager/




From newsgroups at jhrothjr.com  Tue Jan  6 19:54:59 2004
From: newsgroups at jhrothjr.com (John Roth)
Date: Tue, 6 Jan 2004 19:54:59 -0500
Subject: Pre-PEP: Dynamically evaluating default function arguments
References: <711c7390.0401061452.3ee3789f@posting.google.com>
Message-ID: <vvmm8jpspuqj49@news.supernews.com>

"Daniel Ehrenberg" <LittleDanEhren at yahoo.com> wrote in message
news:711c7390.0401061452.3ee3789f at posting.google.com...

> One of the most common bugs that people have on the Python Tutor list
> are caused by the fact the default arguments for functions are
> evaluated only once, not when the function is called. The solution to
> this is usually to use the following idiom:

[snip]

It's an interesting proposal, but outside of the possible
breakage, there is one really major problem:

Where is the variable going to come from on the function
call? If it comes from the original context, it's static so why
bother, and if it comes from the caller's context, you're
causing a *huge* amount of coupling, as well as a substantial
slowdown to do a search of the calling chain and the global
context.

You can't even make it optional: use the original
value if it's not defined in the caller's context. If you
do that, you're still exposing the names to the caller
as names he has to avoid when writing the calling
routine.

To put a somewhat positive spin on it though,
it is a significant novice problem. Given that you
don't want to change the language semantics, what's
the next possible way to fix it?

Compare PEP's 215 and 292. Both of these
do dynamic variable fills, but they have one
critical difference: the template is visible, and not
off in a function or method definition somewhere.
Even so, there are significant issues that have to
be resolved.

John Roth


>
> Daniel Ehrenberg




From paul at boddie.net  Fri Jan 16 06:10:26 2004
From: paul at boddie.net (Paul Boddie)
Date: 16 Jan 2004 03:10:26 -0800
Subject: C++ bad-mouthing (was: Why learn Python ??)
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<878yka2sze.fsf@pobox.com> <100bbekd61fbl53@corp.supernews.com>
	<Xns94711F202CED8JanC@213.119.4.35>
	<100d4ljnic3l465@corp.supernews.com>
	<Xns94723DEFEB830JanC@213.119.4.35>
	<ALMNb.11700$1e.231@newsread2.news.pas.earthlink.net>
Message-ID: <23891c90.0401160310.754b10eb@posting.google.com>

"Andrew Dalke" <adalke at mindspring.com> wrote in message news:<ALMNb.11700$1e.231 at newsread2.news.pas.earthlink.net>...
> JanC:
> > But Netscape was largely based on Mosaic anyway; being developed by the
> > same developers.  The beta I was talking about above still has a Mosaic
> > logo.  ;-)
> 
> While it had many of the same developers, as I recall, none of the code was
> shared.  They were planning to call it Netscape Mosaic but that was
> changed before the final release.

It was actually called Mosaic Netscape for a time since the company
was originally called Mosaic Communications Corporation. Visit
http://www.mcom.com and see where it takes you! (Completely work safe,
I might add.) Now that's what I call long term domain name asset
management!

There seemed to be some fairly major differences between later
releases of Mosaic before NCSA pulled it (after licensing it to
various corporations) and Netscape Navigator - Navigator was threaded
even on Windows 3.1, and was clearly better supported on UNIX, Windows
and Mac. Still, it's amusing to consider Netscape 4.x and earlier as
having some common heritage with Internet Explorer.

As for Grail, it was certainly a "hot product" in the Python community
in 1995 because of the restricted execution environment which I
evaluated for a project involving mobile software agents. How
priorities and trends have changed since then! Who would have thought
that Microsoft Outlook would be the premier platform for mobile code?
;-)

Paul


From __peter__ at web.de  Thu Jan  8 05:39:12 2004
From: __peter__ at web.de (Peter Otten)
Date: Thu, 08 Jan 2004 11:39:12 +0100
Subject: Read from, then write to a file without closing first???
References: <fq6Lb.59055$BQ5.29970@fed1read03>
Message-ID: <btjbot$f56$00$1@news.t-online.com>

Amy G wrote:

> I am looking to make this code a little "nicer"... any suggestions???
> I want to do a "read+" where I would be able to first read the contents of
> the file... then either close the file out or write to the file without
> appending.  I want to overwrite the content.
> 
> vacation_message = "blah blah blah"
> 
> f_vm=open("/home/%s/.vacation.msg" %userid, 'r')
> lines=f_vm.readlines()
> f_vm.close()
> 
> if (lines != vacation_message):
>     f_vm=open("/home/%s/.vacation.msg" %userid, 'w')
>     f_vm.writelines(vacation_message)
>     f_vm.close()

You can open the file in "r+" mode and then f_vm.seek(0) before writing.
However, from the above example I can not see why you even bother to check
the old contents and don't just write the new data.

Peter


From bkelley at wi.mit.edu  Mon Jan 12 12:00:31 2004
From: bkelley at wi.mit.edu (Brian Kelley)
Date: Mon, 12 Jan 2004 12:00:31 -0500
Subject: py2exe, Inno Setup, and tkinter
In-Reply-To: <mailman.276.1073790578.12720.python-list@python.org>
References: <mailman.276.1073790578.12720.python-list@python.org>
Message-ID: <4002d24b$0$577$b45e6eb0@senator-bedfellow.mit.edu>

Anthony Baxter wrote:
> I'm trying to use py2exe and Inno Setup to build an installer for 
> shtoom, which uses tkinter.
> 
> If I take the py2exe generated directory, and run the executable from
> there, it works fine.
> 
> If I add all the files in the directory to an installer (including 
> the tk-8.4 and tcl-8.4 directories), it builds an installer fine.

I have a script for creating innosetup's [FILE] section.  I have used 
this just fine so it fails for you it may indicate a problem with tcl/tk 
on your *normal* installation.  Can you run your program outside of py2exe?

Here is the script:

import os
# This script creates the [FILES] section for innosetup
# I use it for creating the installer for py2exe
# generated distributions.  Mainly because adding the
# tcl/tk stuff is a royal pain.

# Point FROM_DIRECTORY to py2exe's destination directory
# This will include all tcl/tk and wxPython files and
# everything else in the directory and subdirectories.

FROM_DIRECTORY = r"C:\Users\kelley\Working\PlateReader\app\dist\Vista"

os.chdir(FROM_DIRECTORY)
def innoSourceLine(source, dest):
     return 'Source: "%s"; DestDir: "{app}\%s"; CopyMode: 
alwaysoverwrite'%(source, dest)

for root, dirs, files in os.walk("."):
     sourcedir = os.path.abspath(root)
     for f in files:
         # get the destination directory
         source = os.path.join(sourcedir, f)
         dest = root
         print innoSourceLine(source, dest)


# Brian



From brian at sweetapp.com  Thu Jan  8 22:14:33 2004
From: brian at sweetapp.com (Brian Quinlan)
Date: Thu, 08 Jan 2004 19:14:33 -0800
Subject: Pesky reverse()
In-Reply-To: <_noLb.81639$BA6.1706329@news20.bellglobal.com>
Message-ID: <02f001c3d65e$b4871f50$0000fea9@dell8200>

>>> # Method described by Sean Ross
>>> forward = range(10)
>>> reverse = forward[:]   # copy
>>> reverse.reverse()
>>> print forward
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
>>> print reverse
[9, 8, 7, 6, 5, 4, 3, 2, 1, 0]
>>>

This will work too:

>>> forward = range(10)
>>> reverse = forward[-1::-1]
>>> print forward
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
>>> print reverse
[9, 8, 7, 6, 5, 4, 3, 2, 1, 0]
>>>




From jjl at pobox.com  Sun Jan 11 09:16:10 2004
From: jjl at pobox.com (John J. Lee)
Date: 11 Jan 2004 14:16:10 +0000
Subject: help with Python Environment For Blind User
References: <tH2Mb.6292$EL4.3998@nwrddc02.gnilink.net>
Message-ID: <87d69qlget.fsf@pobox.com>

Forgot to include the tinyURL for that URL I posted:

http://tinyurl.com/28pod


John


From irmen at -NOSPAM-REMOVETHIS-xs4all.nl  Wed Jan 14 16:20:09 2004
From: irmen at -NOSPAM-REMOVETHIS-xs4all.nl (Irmen de Jong)
Date: Wed, 14 Jan 2004 22:20:09 +0100
Subject: CheckButton  -- modify "check state"
In-Reply-To: <104c369a.0401141314.5c64a727@posting.google.com>
References: <104c369a.0401141314.5c64a727@posting.google.com>
Message-ID: <4005b288$0$327$e4fe514c@news.xs4all.nl>

Askari wrote:

>    How do for do a "select()" on a CheckButton in a menu (make with
> add_checkbutton(....) )?
> I can modify title, state, etc but not the "check state". :-(

I have no clue what you're talking about: you have to at least
tell us what GUI toolkit you're using, and preferrably, show
a snippet of code.

--Irmen


From llothar at web.de  Wed Jan 28 07:03:38 2004
From: llothar at web.de (Lothar Scholz)
Date: 28 Jan 2004 04:03:38 -0800
Subject: Chart drawing library for Python
Message-ID: <6ee58e07.0401280403.3d52a9e0@posting.google.com>

Hello,

is there something like "JpGraph" for python ?
For those who don't know this PHP library: It is a high level
drawing library that generates gif files with all kind of charts.

Or (maybe better) is there a C library doing this. I think i 
read about something like this a while ago.


From ketulp_baroda at yahoo.com  Wed Jan 14 01:09:20 2004
From: ketulp_baroda at yahoo.com (ketulp_baroda at yahoo.com)
Date: 13 Jan 2004 22:09:20 -0800
Subject: what is best for web development??
References: <f046efac.0401100358.5aa812a0@posting.google.com>
	<87wu80559x.fsf@blakie.riol>
	<f046efac.0401120330.5c2e7c50@posting.google.com>
	<87oet9grqy.fsf@blakie.riol>
Message-ID: <f046efac.0401132209.2f641bb5@posting.google.com>

hi
graham is right.I used the term "client" in the
business sense, not the client/server sense; and i am trying to
write a Web application that is easy to deploy on  clients'
(customers') servers.sorry for the confusion.


From cphsu at zen.com.tw  Fri Jan  9 06:37:53 2004
From: cphsu at zen.com.tw (Kent Hsu (Hsu, Chih-Peng))
Date: Fri, 9 Jan 2004 19:37:53 +0800
Subject: Looking for a Python interface to TAPI on Win32
References: <2259b0e2.0307180401.5dae02f2@posting.google.com>
	<mailman.1058530829.7072.python-list@python.org>
	<3f17f883$0$49107$e4fe514c@news.xs4all.nl>
	<2259b0e2.0307190529.57338b3f@posting.google.com>
	<NpkSa.16049$7O.14695@nwrdny01.gnilink.net>
	<2259b0e2.0307200604.44d343f4@posting.google.com>
	<fo7rvvoa9bh8m1jg2otndeildpl8gqur7i@4ax.com>
Message-ID: <btm416$k75$1@news.seed.net.tw>

Try "ctypes" or "calldll" to call the Win32 api directly.

Best regards,
Kent Hsu

Ray Chu <RaymondChu at nospam.com> wrote in message
news:fo7rvvoa9bh8m1jg2otndeildpl8gqur7i at 4ax.com...
>
>
> I'd like to get familiar with the Win32 phone interface by using Python.
Googling has just yielded Linux
> apps.  Would appreciate specific help or suggestions about where to look.
>
> - TIA
> Ray




From exarkun at intarweb.us  Mon Jan  5 14:24:41 2004
From: exarkun at intarweb.us (Jp Calderone)
Date: Mon, 5 Jan 2004 14:24:41 -0500
Subject: problem with async chat client in windows
In-Reply-To: <btc129$vgu$1@news.gu.se>
References: <btagiv$91o$1@news.gu.se>
	<mailman.89.1073274400.12720.python-list@python.org>
	<btc129$vgu$1@news.gu.se>
Message-ID: <20040105192441.GA5816@intarweb.us>

On Mon, Jan 05, 2004 at 04:49:56PM +0100, Jonas wrote:
> Jp Calderone wrote:
> >On Mon, Jan 05, 2004 at 03:02:29AM +0100, Jonas wrote:
> >
> >>Hi,
> >>I'm writing a small chat client to learn some python and networking. No 
> >>problem with the network stuff tho, the problem is when the user should 
> >>be able to interact and type messages to send. Since I work with windows 
> >>I can't use the select function 
> >
> >
> >  Why not?  select works perfectly well on Windows.
> >
> >  See http://www.twistedmatrix.com/
> >
> >  Jp
> >
> 
> Well the standard library select doesn't work for file descriptors like 
> stdin on windows and I didn't know about Twisted. Anyway there must be some 
> way to solve this without the need for extra depencencies??

  Ahh!  I did not jump from "type messages to send" to "select on stdin",
just assumed you were popping up a window into which the user could type.

  Twisted won't help with reading from stdin, as it relies on select()
working on that file descriptor.

  Not sure if one of the win32-specific modules has something useful here. 
I'd probably just use a GUI.

  Sorry,

  Jp



From rudy.schockaert at pandoraSTOPSPAM.be  Sat Jan 17 12:17:22 2004
From: rudy.schockaert at pandoraSTOPSPAM.be (Rudy Schockaert)
Date: Sat, 17 Jan 2004 17:17:22 GMT
Subject: Best Python IDE Code Completion!
In-Reply-To: <bub64f$g1t$1@news.lucky.net>
References: <ba129ce7.0401150352.43e20efa@posting.google.com>
	<bub64f$g1t$1@news.lucky.net>
Message-ID: <C6eOb.16688$lj.3743779@phobos.telenet-ops.be>

yshurik wrote:
> John wrote:
> 
> 
>>Hi,
>>  Could you give your opinions on the best code completion in Python
>>IDEs. My only complaint with PythonWin has been that the code
>>completion support is incomplete. The interactive mode has better
>>behavior than the editor. Tried to fix it but could not. Boa is not
>>too different. At least when I last checked (a few months ago) Komodo
>>and Visual Python were not very different either.
>>
>>  Wing IDE seems converse. The editor auto list members is great but
>>has no calltips. The interactive window has no completion at all.
>>
>>  I have not checked PythonWorks and Black Adder in a while but their
>>web sites do not seem to brag much in this direction.
> 
> 
> About BlackAdder: because it is oriented to GUI programming.
> in version 1.1 it will have completion for Qt classes and functions.
> and completion to all words which happens in edited text.
> (it is Vi - like style of completion - Ctrl-N, Ctrl-P)
> 
> 
>>  Python has great introspective capabilities and we have a great open
>>contributing community. What technical difficulties keep us from
>>having REAL code completion like MS, Borland and several Java IDEs
>>(All of which have been funded at one time or the other if not
>>entirely - perhaps this is the reason?)
>>
>>  For me, code completion is a very important part of the coding
>>experience and I really miss it in Python in it's full effect.
> 
> 
Have you checked out SPE (Stani's Python Editor):

Spe is a python IDE with wxGlade GUI designer, auto-indentation, auto 
completion, call tips, syntax coloring, syntax highlighting, class 
explorer, source index, auto todo list, sticky notes, integrated pycrust 
shell, python file browser, recent file browser, drag&drop, context 
help, ... Special is its blender support with a blender 3d object 
browser and its ability to run interactively inside blender. Spe is 
extensible with boa.

You can find it at http://spe.pycs.net/


From stephan.diehlNOSPAM at gmx.net  Wed Jan 21 06:17:15 2004
From: stephan.diehlNOSPAM at gmx.net (Stephan Diehl)
Date: Wed, 21 Jan 2004 12:17:15 +0100
Subject: personal document mgmt system idea
References: <b03e80d.0401200538.10fcf33a@posting.google.com>
	<bujmjn$rkn$05$1@news.t-online.com>
	<b03e80d.0401210236.f9dcf01@posting.google.com>
Message-ID: <bulmvs$3fi$05$1@news.t-online.com>

Sandy Norton wrote:

> Stephan Diehl wrote:
> 
> [...]
> 
[...]
>> In addition, a real (text) search engine might be of help. I'm using
>> swish-e (www.swish-e.org) and are very pleased with it.
> 
> Just downloaded it... looks good. Now if it also had a python api (-;

I'm just using the command line interface via os.system and the popenX
calls. 
The only thing that (unfortunatelly) not possible, is to remove a document
from the index :-(
If you need any help, just drop me a line.

> 
>> Maybe, before you invest to much time into such a project, you should
>> check out the following:
>> 
>> Chandler (http://www.osafoundation.org)
>>         if it's finished, it will do excactly what you are aiming for
>>         (and it's written in Python)
> 
> Still early stages... I see they dropped the ZODB.

Did they? If they succeed, Chandler will rock. My personal opinion is that
they try doing too much at once. I guess that a better filesystem will make
most of the document management type applications obsolete.
The big problem, of course, is to define 'better' in a meaningfull way.

> 
>> ReiseFS (see www.namesys.com -> Future Vision)
>> Gnome Storage (http://www.gnome.org/~seth/storage)
>> WinFS
>>
(http://msdn.microsoft.com/Longhorn/understanding/pillars/WinFS/default.aspx)
> 
> 
> Wow! Very exciting stuff... I guess we'll just have to wait and see what
> develops.

Or go the other way: build a new filesystem prototype application in python
and see, if it works out as intended and then build a proper file system.

> 
> 
>> Hope that helps
> 
> Yes. Very informative. Cheers for the help.
> 
>> Stephan
> 
> Sandy



From q2n8byu02 at sneakemail.com  Tue Jan  6 21:44:07 2004
From: q2n8byu02 at sneakemail.com (Ivan Nestlerode)
Date: 6 Jan 2004 18:44:07 -0800
Subject: KeyboardInterrupt and threading
References: <a6562e06.0401021352.65aac82b@posting.google.com>
	<m3fzeu73k3.fsf@pc150.maths.bris.ac.uk>
Message-ID: <a6562e06.0401061844.3269da85@posting.google.com>

Michael Hudson <mwh at python.net> wrote in message news:<m3fzeu73k3.fsf at pc150.maths.bris.ac.uk>...
> On debian, the signal module certainly should be available, and the
> KeyboardInterrupt exception should go to the main thread.  Or at
> least, that's what I thought.  You're definitely seeing it being
> delivered to an arbitrary thread?
> 
> Cheers,
> mwh

After a closer look, I am not seeing KeyboardInterrupt being delivered
to non-main threads. What I am seeing is that Ctrl-C does not work at
all when non-main threads are CPU intensive. I had previously jumped
to the conclusion that because Ctrl-C didn't work and because the
non-main thread was sloppy ("except:"), that Ctrl-C wasn't working
because KeyboardInterrupt was going to the sub-thread. That was an
incorrect conclusion.

So I guess the entire problem can be restated as:
How do I make Ctrl-C work properly when the non-main thread is busier
than the main thread?

The short program at the end of this post demonstrates the problem
with Ctrl-C and busy non-main threads. The idea behind this script is
that the main thread launches a busy sub-thread. Ctrl-C is supposed to
be caught in the main thread, stopping both threads, and ending the
program (with some printouts). As written, the program does not
respond to Ctrl-C even if I hold it down continuously. If you
uncomment the print statement in the main thread, all of the sudden it
starts to work. Why?

I think it has something to do with the main thread needing some
larger amount of CPU to detect the signal and the KeyboardInterrupt. I
think this is a bug though (I shouldn't have to put hacks into the
main thread to get this to work).

Any thoughts?

Thanks,
-Ivan


#!/usr/bin/python

from threading import Event, Thread
from time import sleep

class CpuHogThread(Thread):
    def __init__(self):
        Thread.__init__(self)
        self.counter = 0
        self.stopEvent = Event()

    def join(self):
        self.stopEvent.set()
        Thread.join(self)

    def run(self):
        try:
            while not self.stopEvent.isSet():
                self.counter += 1
        except KeyboardInterrupt:
            print 'CPU hog subthread caught KeyboardInterrupt'

if __name__ == '__main__':
    t = CpuHogThread()
    t.start()
    print 'CPU hog subthread spawned'
    try:
        while True:
            sleep(2)
            # without the next print, Ctrl-C is completely ignored
            #print 'still sleeping'
    except KeyboardInterrupt:
        print 'main thread caught KeyboardInterrupt'
        t.join()
        print 'CPU hog subthread joined at counter %d' % t.counter


From paul at prescod.net  Wed Jan 21 10:34:05 2004
From: paul at prescod.net (Paul Prescod)
Date: Wed, 21 Jan 2004 07:34:05 -0800
Subject: Installing SpamBayes
In-Reply-To: <400d3f3f_2@newsfeed.slurp.net>
References: <400c399b_2@newsfeed.slurp.net>	<up5r00hr648soiun3j6q326ga9n808hf17@4ax.com>	<400c451a_1@newsfeed.slurp.net>	<20040120135921.1C3F.JCARLSON@uci.edu>	<400c5790_1@newsfeed.slurp.net>	<20040120150005.1C48.JCARLSON@uci.edu>	<400c6146_1@newsfeed.slurp.net>	<20040120171127.0606.JCARLSON@uci.edu>
	<400d3f3f_2@newsfeed.slurp.net>
Message-ID: <400E9BED.7020700@prescod.net>

Dog at will.hunt wrote:

> Its my fault for not being clear on this.  I know how to change the
> directory on a command prompt in Windows.  I was speaking of the Python
> prompt (>>>).  Once I got that, I tried running the file but got this:
> 
> Python 2.3.3 (#51, Dec 18 2003, 20:22:39) [MSC v.1200 32 bit (Intel)] on
> win32
> Type "help", "copyright", "credits" or "license" for more information.
> 
>>>>python setup.py install
> 
>   File "<stdin>", line 1
>     python setup.py install
>                ^
> SyntaxError: invalid syntax

You do not run the setup command from within Python. You do it from your 
Windows/Unix/Mac/DOS command line.

C:\>python setup.py install

  Paul Prescod





From skip at pobox.com  Wed Jan 14 09:48:31 2004
From: skip at pobox.com (Skip Montanaro)
Date: Wed, 14 Jan 2004 08:48:31 -0600
Subject: pulling set of unique values from a list
In-Reply-To: <400551c0$1@baen1673807.greenlnk.net>
References: <400551c0$1@baen1673807.greenlnk.net>
Message-ID: <16389.22207.524690.979989@montanaro.dyndns.org>


    Ben> I need to get [1,2,3] from [1,1,1,2,2,3,3] with as little effort
    Ben> possible for my CPU (and keyboard).

You didn't say if order was important, but since one solution you posted was
dict-based, I'll assume not.  If you're running 2.3 or from CVS, this seems
the most straightforward to me:

    >>> list(set([1,1,1,2,2,3,3]))
    [1, 2, 3]

given the new set type.  If you are running 2.3 you'll need to import from
the sets module:

    >>> from sets import Set as set
    >>> list(set([1,1,1,2,2,3,3]))
    [1, 2, 3]

Skip



From EP at zomething.com  Thu Jan  1 18:24:02 2004
From: EP at zomething.com (EP)
Date: Thu, 01 Jan 2004 15:24:02 -0800
Subject: Test if IDLE is a mature program
In-Reply-To: <bsvnbb$qub$0@216.39.172.122>
References: <ppKdnTEKUp3Hr2-iRVn-jg@comcast.com>
	<7ti4vvoburp4k4o4a0v5p4shae7o5uhotb@4ax.com>
	<edqdnVxBL_Q3fG-iRVn-gg@comcast.com>
	<3ff30f2f.674586974@news.blueyonder.co.uk>
	<hcqdnZoZbN-Li26iRVn-hw@comcast.com>
	<bsv6jj$7g6$03$1@news.t-online.com>
Message-ID: <5.2.0.9.0.20040101151048.00b7c4b0@mail.zomething.com>


>Anyway, there might be some use in thinking about the underlying issue...


Any "complaint", if that's even really what the original post was, is a 
gift, an opportunity for epiphany and original thought.  Defenses of IDLE 
seem to be based on existing paradigms broadly accepted - that doesn't mean 
there isn't a better, smarter way (and I am imagining inventive Pythonistas 
somewhere concocting strange and beautiful things in "the labs".)

As an esteemed manager once told me: "Your job is to make your job obsolete."


cheers and Happy New Year!,


EP
"who likes IDLE just a little too much"




From nuffsaid at phreaker.net  Wed Jan 21 05:42:52 2004
From: nuffsaid at phreaker.net (Nuff Said)
Date: Wed, 21 Jan 2004 11:42:52 +0100
Subject: twistedmatrix.com - time out error
Message-ID: <pan.2004.01.21.10.42.52.628395@phreaker.net>

I am trying to download Twisted form www.twistedmatrix.com since
maybe 2 days, but I always get a time out error from the server.

Is there a mirror resp. another 'official' download site for Twisted?
(Or: does someone know what's going on with twistedmatrix.com?)

Thanks in advance for any hint! 

Nuff




From jzgoda at gazeta.usun.pl  Tue Jan 13 14:01:58 2004
From: jzgoda at gazeta.usun.pl (Jarek Zgoda)
Date: Tue, 13 Jan 2004 19:01:58 +0000 (UTC)
Subject: id3v2 module
References: <pan.2004.01.13.09.12.39.813880@beeznest.NOSPAM.net>
	<mailman.324.1074009121.12720.python-list@python.org>
Message-ID: <bu1fb5$d0g$2@nemesis.news.tpi.pl>

Andy Todd <andy47 at halfcooked.com> pisze:

>> I'd like to know if there is a third-party module for reading/writing
>> id3v2 informations.
>> Thanks 
> 
> http://www.nedbatchelder.com/code/modules/id3reader.html

Good one, but only for reading.

-- 
Jarek Zgoda
Unregistered Linux User #-1
http://www.zgoda.biz/ JID:zgoda-a-chrome.pl http://zgoda.jogger.pl/


From piedmontbiz at aol.com  Thu Jan 15 17:59:53 2004
From: piedmontbiz at aol.com (PiedmontBiz)
Date: 15 Jan 2004 22:59:53 GMT
Subject: Printing to console, no scroll
References: <4006C2FB.B377BE82@engcorp.com>
Message-ID: <20040115175953.26514.00000024@mb-m07.aol.com>

>From: Peter Hansen peter at engcorp.com 
>Date: 1/15/04 11:42 AM Eastern Standard Time
>Message-id: <4006C2FB.B377BE82 at engcorp.com>
>
>PiedmontBiz wrote:
>> 
>> Sorry for my post with all the ansi.py code.
>> 
>> I forgot the website I got it from.
>
>Google is your friend (along with five seconds of effort):
>
>  http://www.demonseed.net/~jp/code/ansi.py
>
>-Peter
>
>
>
>
>
>

Appreciate the rebuke. Also, the url was saved in the html by IExplorer. I
could have looked there.

Allen


From skip at pobox.com  Fri Jan 16 17:51:15 2004
From: skip at pobox.com (Skip Montanaro)
Date: Fri, 16 Jan 2004 16:51:15 -0600
Subject: Bug or feature?
In-Reply-To: <200401162241.07500.james@logicalprogression.net>
References: <bu58st$1ha3$1@news.rtcomm.ru>
	<200401161613.06481.james@logicalprogression.net>
	<20040116191853.GA27129@intarweb.us>
	<200401162241.07500.james@logicalprogression.net>
Message-ID: <16392.27363.264594.821314@montanaro.dyndns.org>


    >> Of course, it should be noted that, in Python, "a += b" is only
    >> sometimes synonymous with "a = a + b".  The rest of the time, it's
    >> hard to say what it is synonymous with :)

    James> What do you have in mind?  J.

For immutable objects, += works as you'd expect: return a new object,
leaving the old object unchanged.  That's not the case for mutable objects,
to wit:

    >>> foo = [1]
    >>> bar = foo
    >>> foo += [2]

The object referenced by foo is modified in-place...

    >>> bar
    [1, 2]
    >>> foo = foo + [2]

Here foo is bound to a new object, leaving the old object (still referenced
by bar) unchanged.

    >>> foo
    [1, 2, 2]
    >>> bar
    [1, 2]

Skip



From csgcsg39 at hotmail.com  Fri Jan  9 11:07:08 2004
From: csgcsg39 at hotmail.com (CSG)
Date: 9 Jan 2004 08:07:08 -0800
Subject: ZSI and faults
Message-ID: <592ab9dd.0401090807.6c68e4a@posting.google.com>

Dear All,

I'm very new to python/ZSI and have a (simple) query to ask. I have a
simple client:

from ZSI.client import Binding
fp=open('debug.out','w')
b=Binding(url='somewhere',tracefile=fp)
print b.connect('usename')
fp.close()

and a server of

from ZSI import *
import sys

def connect(usename):
  try:
    <something that fails>
  except Exception,e:
    <write the Exception in the SOAP message back to client>
    sys.exit(1)


The trouble I'm having is with the <write the Exception in the SOAP
message bit>. I've tried things like:

FaultFromException(e,0).AsSOAP(sys.stdout)
or
f=Fault()
f.code="some message"

with no success.

Any suggestions

Many thanks

Colin


From NAIGIMSESRIMAIL at gims.com  Tue Jan 27 05:20:37 2004
From: NAIGIMSESRIMAIL at gims.com (GroupShield for Exchange (ESRIMAIL))
Date: Tue, 27 Jan 2004 12:20:37 +0200
Subject: ALERT -  GroupShield ticket number OA1434_1075198830_ESRIMAIL_3 w
	as generated
Message-ID: <B06B8FEF47ACD7119E720040F428459101F64EA4@ESRIMAIL>

Action Taken:
The attachment was quarantined from the message and replaced with a text
file informing the recipient of the action taken.

To:
'python-list at python.org' <python-list at python.org>

From:
GroupShield for Exchange (ESRIMAIL) <NAIGIMSESRIMAIL at gims.com>

Sent:
183607680,29615295

Subject:
ALERT -  GroupShield ticket number OA1430_1075198765_ESRIMAIL_3 was
generated

Attachment Details:-

Attachment Name: ATT09137.txt
File: ATT09137.txt
Infected? No
Repaired? No
Blocked? Yes
Deleted? No
Virus Name: 



	
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From carroll at tjc.com  Tue Jan 27 23:05:46 2004
From: carroll at tjc.com (Terry Carroll)
Date: Wed, 28 Jan 2004 04:05:46 GMT
Subject: Confused about a list.sort()
References: <S6FRb.2098$P17.1139@fed1read03>
Message-ID: <l0de101nt782qrc2p5mfk6qeg7gsm8ogae@4ax.com>

On Tue, 27 Jan 2004 18:28:09 -0800, "Amy G" <amy-g-art at cox.net> wrote:

>I have a list of numbers... actully I have two lists, List 1 is a list of
>number strings and List2 is one of numbers.
>
>List 1 example:
>List1 = [ '20040124123000', '20040124123001', '20040125012456']
>
>List 2 example:
>List2 = [ 20040124123000L, 20040124123001L, '20040125012456L]
>
>When I try either:
>List1 = List1.sort ... or
>List2 = List2.sirt
>
>and then...
>print List1... or
>print List2
>
>I get None.
>
>Why is this?

Yeah, most everyone who uses sort() for the first time gets bit by this.

Sort() sorts the list in place, and returns None:

 >>> list1=[20, 40, 60, 80, 10, 30, 50]
 >>> list1
 [20, 40, 60, 80, 10, 30, 50]
 >>> list1.sort()
 >>> list1
 [10, 20, 30, 40, 50, 60, 80]

So, to sort list1, you just use list1.sort(), not foo = list1.sort()




From LittleDanEhren at yahoo.com  Sat Jan 31 21:22:09 2004
From: LittleDanEhren at yahoo.com (Daniel Ehrenberg)
Date: 31 Jan 2004 18:22:09 -0800
Subject: Python vs. Io
References: <711c7390.0401291301.3f95794@posting.google.com>	<qnkfzdyieg0.fsf@arbutus.physics.mcmaster.ca>	<711c7390.0401301710.4353274@posting.google.com>	<bvf6kc$2v$2@news.service.uci.edu>	<711c7390.0401311220.763be80a@posting.google.com>
	<mailman.1082.1075584061.12720.python-list@python.org>
Message-ID: <711c7390.0401311822.539c381a@posting.google.com>

> >[snip]
>   Definitely.  But "stuff" isn't always the same as "magical syntax".
>  
>   Jp

By that logic, anything that can be implimented in the language isn't
"magical syntax". In Io, there is no difference between flow control
and functions, so it's not "magical syntax" and it's just "stuff".

Daniel Ehrenberg


From klapotec at chello.at  Sat Jan 31 00:24:49 2004
From: klapotec at chello.at (Christopher Koppler)
Date: Sat, 31 Jan 2004 05:24:49 GMT
Subject: HowTo Search in nested lists
References: <mailman.1061.1075490301.12720.python-list@python.org>
Message-ID: <qhem10trs44dlm2r5krtcu70rd9v9o6aq0@4ax.com>

On Fri, 30 Jan 2004 11:11:47 -0800, "Robert Brewer"
<fumanchu at amor.org> wrote:

>Florian Lindner wrote:
>> >I've two nested lists which are representing a table or matrix.
>> >Now I found to search for certain values in a certain column.
>> >For example: column 1, search for 5, return 1, because 5 is 
>> >found in the first column of the second element of t
>
>Christopher Koppler replied:
>> ...let's make a function of it that returns the list(s)
>> (in case you have more than one list fitting your search
>> criteria) containing the searched for value.
>
>Good answers, Christopher. You might consider combining the several
>approaches into a single one by creating an iterator;

Well, just what popped into my mind first. I still have some trouble
getting iterators and generators to pop up before, though often
they're just so much more elegant, as your solution shows. But for
that I have to consciously think about the problem, whereas ordinary
functions are quite entrenched in my brain. I blame my shady past of
Pascal, Visual Basic, Modula 2, C, and Java. At least by now I
instantly think of list comprehensions...


--
Christopher


From rodrigob at elo.utfsm.cl  Mon Jan 19 10:06:28 2004
From: rodrigob at elo.utfsm.cl (Rodrigo Benenson)
Date: Mon, 19 Jan 2004 12:06:28 -0300
Subject: Munkware 0.3
References: <mailman.498.1074509063.12720.python-list@python.org>
Message-ID: <400beeb1$1_1@nova.entelchile.net>

as common, using twistedmatrix.com will ease a lot to you to provide remote
access methods

rodrigob.

"Jeremy Jones" <zanesdad at bellsouth.net> escribi? en el mensaje
news:mailman.498.1074509063.12720.python-list at python.org...
> Munkware, a transactional and persistent queueing mechanism, is proud to
> announce version 0.3 for public consumption.  One bug fix in this release:
>
> - Now checks for proper index on all put_commit() and get_commit() calls.
>
> The Sourceforge Project page is located at
> http://sourceforge.net/projects/munkware/ and the project home page is
located
> at http://munkware.sourceforge.net/
>
> I'm currently working on a quasi-RESTish (web services/HTTP) interface for
> Munkware rather than going the SOAP route that I had initially thought.
I've
> got a design about 3/4 of the way hammered out, but no code so far on
that.  I'm
> planning on (at least as a first stab) using the standard library
BaseHTTPServer
> to run it from.  Hopefully, I'll be able to get something present-able in
the
> next couple of weeks.
>
> If you have any suggestions, please feel free to email them to me.
>
>
> Jeremy Jones
>




From jeff.holle at verizon.net  Wed Jan 28 15:54:00 2004
From: jeff.holle at verizon.net (Jeffrey Holle)
Date: Wed, 28 Jan 2004 12:54:00 -0800
Subject: linking problems with Python C API
Message-ID: <bv97mq$bfs$1@sea.gmane.org>

I am working on a Linux system using gcc v3.3 and python v2.3.2
I have a problem linking a cpp program to a shared library that uses the 
Python C API.
With just referencing this shared library, I get unresolved references like:
   PySequence_DelSlice
   PyNumber_InPlaceXor
   PyInt_FromLong
   _PyObject_New
This is just a sample, there are actually 130 of similarly named functions.

The only other library that I have tried, 
/usr/local/lib/python2.3/config/libpython2.3.a, causes more trouble, to 
the point that makes me believe this is a misdirection.

Can anybody tell me what library I should be linking to?





From sheetalap79 at yahoo.com  Sun Jan 25 12:42:07 2004
From: sheetalap79 at yahoo.com (SA)
Date: 25 Jan 2004 09:42:07 -0800
Subject: Need Python script to search content in the web pages
Message-ID: <e2a890ee.0401250942.153b1a73@posting.google.com>

Hello

I need a python script that can enable users of a site to search
through the contents of the website.

Can anyone help?

--SA


From newspost at lolmc.com  Mon Jan 26 13:56:03 2004
From: newspost at lolmc.com (Lol McBride)
Date: Mon, 26 Jan 2004 18:56:03 +0000
Subject: MySQL insert query problem
References: <pan.2004.01.25.22.28.29.641943@lolmc.com>
	<mailman.773.1075070982.12720.python-list@python.org>
Message-ID: <pan.2004.01.26.18.55.59.298839@lolmc.com>

On Sun, 25 Jan 2004 17:49:37 -0500, Mike C. Fletcher wrote:

> Did you by any chance declare the field to be 19 characters wide when 
> creating the database?  Truncating to the length of the field is, I 
> think, normal SQL practise.
> 
> Just a thought,
> Mike
> 
> Lol McBride wrote:
> ...
> 
>>varchar field in a database I'm using. The query being sent to the MySQL
>>server  by my program is : INSERT INTO analysis (DrawNumber,pool1)VALUES
>>(847, ' (4, 8, 21, 24, 39, 44) ' ) ;
>>
>>But the field pool1 actually contains  (4, 8, 21, 24, 39, i.e it is
>>missing the final digits ( 44 ) 
>>
> ...
> 
> _______________________________________
>   Mike C. Fletcher
>   Designer, VR Plumber, Coder
>   http://members.rogers.com/mcfletch/
Oh yeah baby, obvious and therefore invisible to my gaze.Thank you for
opening my eyes.
Lol McBride


From aahz at pythoncraft.com  Fri Jan 30 15:59:50 2004
From: aahz at pythoncraft.com (Aahz)
Date: 30 Jan 2004 15:59:50 -0500
Subject: Safe to modify globals(), or not?
References: <6714766d.0401291559.45413e0d@posting.google.com>
	<bvd6hm$9h1$03$1@news.t-online.com> <bve3te$fk9$1@panix2.panix.com>
	<bve8f3$us$01$1@news.t-online.com>
Message-ID: <bvegk6$d8p$1@panix2.panix.com>

In article <bve8f3$us$01$1 at news.t-online.com>,
Peter Otten  <__peter__ at web.de> wrote:
>Aahz wrote:
>> In article <bvd6hm$9h1$03$1 at news.t-online.com>,
>> Peter Otten  <__peter__ at web.de> wrote:
>>>Aahz wrote:
>>>>
>>>> import __main__
>>>> tmp = parse_funky_language("Hey, this is far out, man.")
>>>> setattr(__main__, tmp.name, tmp.value)
>>>> 
>>>> In the context of the interactive interpreter, it's a bit harder to do;
>>>> I don't remember off-hand what the namespace of the interpreter is.
>>>
>>>You don't need to :-)
>>>
>>>Python 2.3.3 (#1, Jan  3 2004, 13:57:08)
>>>[GCC 3.2] on linux2
>>>Type "help", "copyright", "credits" or "license" for more information.
>>>>>> __name__
>>>'__main__'
>> 
>> Yes, but how do you access that from a module?
>
><interp.py>
>import sys
>import __main__
>setattr(sys.modules["__main__"], "name", "value")
>__main__.anotherName = "another value"
></interp.py>
>
>Python 2.3.3 (#1, Jan  3 2004, 13:57:08)
>[GCC 3.2] on linux2
>Type "help", "copyright", "credits" or "license" for more information.
>>>> import interp
>>>> name
>'value'
>>>> anotherName
>'another value'
>>>>
>
>Or is this a misunderstanding continued?

<smacks head>  No, it's a brain fart; for some reason, I was thinking
that "__main__" == "currently executing module".
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

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


From andreas at andreas-jung.com  Sun Jan 18 08:18:47 2004
From: andreas at andreas-jung.com (Andreas Jung)
Date: Sun, 18 Jan 2004 14:18:47 +0100
Subject: Fw: PDF library for reading PDF files
In-Reply-To: <000c01c3ddc3$27312800$7800a8c0@mailer>
References: <000c01c3ddc3$27312800$7800a8c0@mailer>
Message-ID: <2147483647.1074435527@[192.168.0.102]>

There is none. Use an external converter to convert the PDFs to text and 
then
read the result using some common Python module (os.system(), commands 
module etc).

-aj

--On Sonntag, 18. Januar 2004 14:01 Uhr +0100 Peter Galfi 
<galfip at freestart.hu> wrote:

> Hi!
>
> I am looking for a library in Python that would read PDF files and I
> could extract information from the PDF with it. I have searched with
> google, but only found libraries that can be used to write PDF files.
>
> Any ideas?
>
> Peter







From exarkun at intarweb.us  Fri Jan  9 14:00:53 2004
From: exarkun at intarweb.us (Jp Calderone)
Date: Fri, 9 Jan 2004 14:00:53 -0500
Subject: PRE-PEP: new Path class; sorting and __cmp__
In-Reply-To: <3FFEF5DC.1080804@beyond-thoughts.com>
References: <vvivefh35qjv9a@news.supernews.com>
	<3FFEF5DC.1080804@beyond-thoughts.com>
Message-ID: <20040109190053.GA3677@intarweb.us>

On Fri, Jan 09, 2004 at 07:41:32PM +0100, Christoph Becker-Freyseng wrote:
> As I pointed out path.__cmp__ should not be used for e.g. comparing 
> filesizes.
> 
> But features like sorting on filesizes are very useful.
> I'm not sure if Gerrit Holl already meant this in his conclusion on 
> "Comparing files" in the PEP.
> I'll outline it a bit ...

  This seems to be covered by the new builtin DSU support which will exist
in 2.4.  See the (many, many) posts on python-dev on the "groupby" iterator:

    http://mail.python.org/pipermail/python-dev/2003-December/thread.html

  In particular, the ones talking about `attrget'.

  Jp



From anthony at interlink.com.au  Thu Jan 22 10:08:49 2004
From: anthony at interlink.com.au (Anthony Baxter)
Date: Fri, 23 Jan 2004 02:08:49 +1100
Subject: interest in an email package sprint at PyCon?
Message-ID: <20040122150849.0B2DB25ADD5@bonanza.off.ekorp.com>


How many people are going to PyCon and interested in a sprint 
focused on the email package? I'm trying to work out if there's
enough people to make it worthwhile... followups to me or to
the email-sig at python.org list.

Thanks,
Anthony
--
Anthony Baxter     <anthony at interlink.com.au>
It's never too late to have a happy childhood.




From ray at rays-web.com  Thu Jan  1 22:38:38 2004
From: ray at rays-web.com (Ray Smith)
Date: 1 Jan 2004 19:38:38 -0800
Subject: Rekall Binary
References: <8a27e309.0312310529.3c1f43a8@posting.google.com>
	<bsvel2$4n2$1@news.nems.noaa.gov>
	<8a27e309.0401010633.20271486@posting.google.com>
	<6ee58e07.0401011433.5ce91221@posting.google.com>
Message-ID: <5654fff9.0401011938.1dd4bd85@posting.google.com>

llothar at web.de (Lothar Scholz) wrote in message news:<6ee58e07.0401011433.5ce91221 at posting.google.com>...

[snip]

> In fact i believe that a main stream desktop tool like "Rekall" has no
> future when it must live on support contracts only. If you need
> support then the product has an error, but i don't want to use
> errounous software. This is the reason why GPL does not work for a lot
> of software products.

Every non trival product has errors.  ( And most trival product ;) )

Support charges "seem to me" to be one of the most popular ways for
Open Source devlopers to make an income.  Coupled with the fact that
most sane IT managers won't rely on unsupport software it seems to
make alot of sense.

Note: IT managers will rely on "officially unsupported" software if it
has an excellent track record, i.e. Debian, in the same breath why do
so many companies buy Linux supported distributions (i.e. Red Hat)?

Regards,

Ray Smith


From deets_noospaam at web.de  Thu Jan  8 07:51:05 2004
From: deets_noospaam at web.de (Diez B. Roggisch)
Date: Thu, 08 Jan 2004 13:51:05 +0100
Subject: creating a daemon?
References: <3ffd355c.0@news1.mweb.co.za>
Message-ID: <btjjnp$cru$04$1@news.t-online.com>

bmgx wrote:

> This is what I am trying to find out, instruction on how to create a
> simple daemon on unix systems(Linux), can't find any info on usual
> sources..

google: daemonize python fork

Works perfect for me.

Diez


From astoltz at nyx.net  Fri Jan 30 09:10:20 2004
From: astoltz at nyx.net (Al Stoltz)
Date: Fri, 30 Jan 2004 07:10:20 -0700
Subject: Python ODBC Driver Module
In-Reply-To: <bvdnl9$3k2$06$1@news.t-online.com>
References: <bvdnl9$3k2$06$1@news.t-online.com>
Message-ID: <Pine.GSU.4.56.0401300706310.24720@nyx10.nyx.net>



On Fri, 30 Jan 2004, Mark Buch wrote:

> Hi,
>
> where can i find a freeware python odbc module for windows?

ActiveState's distribution of python (ActivePython) comes bundled with a
bunch of windows only exensions - including an ODBC module.

http://activestate.com/Products/ActivePython/


From jcarlson at nospam.uci.edu  Fri Jan 30 03:43:07 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Fri, 30 Jan 2004 00:43:07 -0800
Subject: Printing/updating output to the screen
In-Reply-To: <40192945$1@nntphost.cis.strath.ac.uk>
References: <40192945$1@nntphost.cis.strath.ac.uk>
Message-ID: <bvd5iv$3bv$2@news.service.uci.edu>

Daniel Pryde wrote:

> Hi there. I hope this isn't a stupid question to ask, but does anyone 
> know how to print out a string without moving to a new line each time 
> and simply updating the first line. An example would be, if I wanted to 
> have a percentage progress counter that was constantly updating. I'm 
> unsure how to do this without printing to a brand new line. Any help 
> would be greatly appreciated. Thanks.
> 
> Daniel
> 

try this...

import time

for i in xrange(101):
     print i, '\r',
     time.sleep(.1)

  - Josiah


From reidyre at yahoo.com  Tue Jan 27 15:56:39 2004
From: reidyre at yahoo.com (Ron Reidy)
Date: 27 Jan 2004 12:56:39 -0800
Subject: Compiling DCOracle2 on RH Linux 8.0
References: <ab425431.0401211512.6c698e00@posting.google.com>
	<8725c51c.0401241912.316a7cfc@posting.google.com>
Message-ID: <ab425431.0401271256.acf131c@posting.google.com>

dripton at wizard.net (David Ripton) wrote in message news:<8725c51c.0401241912.316a7cfc at posting.google.com>...
> reidyre at yahoo.com (Ron Reidy) wrote in message news:<ab425431.0401211512.6c698e00 at posting.google.com>...
> 
> > I am trying to compile DCOracle2 on RedHat 8.0 and make is giving me
> > the following error:
> > 
> > gcc -pthread -fPIC -DNDEBUG -g -O3 -Wall -Wstrict-prototypes
> > -I/usr/local/include/python2.3 -I/usr/local/include/python2.3 @DEFS@  
> > -I/oracle/app/oracle/9i/rdbms/demo
> > -I/oracle/app/oracle/9i/network/public
> > -I/oracle/app/oracle/9i/plsql/public
> > -I/oracle/app/oracle/9i/rdbms/public -DORACLE9i -c ././dco2.c -o
> > ./dco2.o
> > gcc: cannot specify -o with -c or -S and multiple compilations
> > 
> > 
> > Did I do something wrong?
> 
> No.  The DCOracle2 build process isn't very robust.
> 
> Look at src/Makefile.  Find a line that says "DEFS=%DEFS" and change
> it to "DEFS=-fno-strict-aliasing"

David,

Thanks.  That worked well.  Now, how do I install it?  The only copies
of dco2.so that exist are in the directory tree where I built the
library.  In searching for any kind of install directios, I found
nothing like 'make install', etc.

Thanks you your help.


From deets_noospaam at web.de  Sat Jan 24 20:55:23 2004
From: deets_noospaam at web.de (Diez B. Roggisch)
Date: Sun, 25 Jan 2004 02:55:23 +0100
Subject: [OPINION] - does language really matter if they all do the same
	thing?
References: <69A0D4AB81C51447AD6BA387782B8D64093D8A@midl-mail4.etcconnect.com>
	<028FD9F0-4E01-11D8-BB78-0003934ACDEC@zdome.net>
	<4011C497.1040302@prescod.net>
	<58587302-4E30-11D8-8FAB-0003934ACDEC@zdome.net>
	<4012FEB1.5000106@prescod.net>
	<mailman.750.1074987689.12720.python-list@python.org>
Message-ID: <buv7mb$h39$03$1@news.t-online.com>

Hi,

> Has anyone here ever looked at different languages for making an
> interactive website, and felt that Python was the best choice of
> language to use?
> 
> It would definitely be a learning curve for me, since I know PHP so well,
> but if it had some great benefits, I'd go for it.
> (Half just for fun, to learn something new.)

As others have pointed out, PHP is _made_ for creating websites. Some people
are using it for general purpose programming, but its not tailored to that.
Thats a major difference to python: Its aim is programming in general. Its
power for certain task comes from the ease of creating libs, tools and apps
for these special cases: twisted for networking, ZOPE (and others) for
webapps, COM access, GUI building and so on. 

For websites, I tried ZOPE - and quite love it. But I'm a programmer at
first, not so much a website designer. And while there are great products
for ZOPE, like PLONE or ZMS, that give you a fully featured CMS with a
couple of clicks, I have to admit that DTML and even TAL/METAL as
templating languages are a kludge. At least for someone with a "how do I
get this particular task done ASAP"-attitude. PLONE and ZMS both encourage
separation of data from presentation. This is very good from a purist POV,
and has advantages in larger environments where some people provide app
logic and others the layout. But for small projects, it bears unecessary
complexity.

So - if your goal is just to enhance your forum with a "new
articles"-counter, you almost surely are better of with PHP. But if your
projects get more elaborated with complex data models, or you want to
explore programming beyond HTML-generation, I urge you to give Python a
try.

Regards,

Diez


From adalke at mindspring.com  Fri Jan 16 02:58:39 2004
From: adalke at mindspring.com (Andrew Dalke)
Date: Fri, 16 Jan 2004 07:58:39 GMT
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
	<pan.2004.01.14.01.17.00.970198@fakeemail.com>
	<bu2ana$bmpci$1@ID-207230.news.uni-berlin.de>
	<Xns94711BBF5F7D6JanC@213.119.4.35>
	<LiwNb.8126$f97.2162@fe3.columbus.rr.com>
Message-ID: <PQMNb.11701$1e.731@newsread2.news.pas.earthlink.net>

R. Alan Monroe
> >You think "cross-platform" means "it runs out-of-the-box on all possible
> >platforms that ever existed, now exist, and will ever exist"?
> >
> >Please go searching and come back when you find 1 (one) program which
fits
> >that definition...  :-p

My favorite program for this is /bin/true.  On some machines it is 0
bytes long.  It works on Unix and, with a ".bat" extension, on MS
Windows.

                    Andrew
                    dalke at dalkescientific.com




From engsolnom at ipns.com  Fri Jan  2 00:23:00 2004
From: engsolnom at ipns.com (engsolnom at ipns.com)
Date: Thu, 01 Jan 2004 21:23:00 -0800
Subject: NEWBIE: map | zip | list comp
Message-ID: <odv9vvgb4aobq4c617k0ju4plat2d81j0o@4ax.com>

Hello again...hope everyone had a great New Year...:)

In the quest to learn more about Python, I decided to create an arbitrary sequence,
then march each member through a 'field' of each of the members in turn, and just to complicate it a
bit, make the length of the field user defined.
Hard to explain...an example might serve:

10000
01000
00100
  .
  .
00009
01111
10111
11011
  .
  .
21111
12111
11211
and so forth.

The only coding I could come up with is:

base_seq = 'ABCD'
length = 6

for char_1 in base_seq:                          # Loop thru the set char_1 at a time
    for char_2 in base_seq:                     # Loop thru the seq again for each char_1
        if char_2 == char_1: continue         # Don't march 'A' thru a field of 'A's
        for ix in range(length):                     # Now march char_2 thru a field of char_1's
            print (char_1 * length)[:ix] + char_2 + (char_1 * length)[ix:-1]

which, as you can see, has three nested FOR loops. I played with map, zip and list comps a bit, but
couldn't figure out how to compress the above code. Am I barking up the wrong Python tree?

Thanks......Norm




From jzgoda at gazeta.usun.pl  Sat Jan  3 02:54:19 2004
From: jzgoda at gazeta.usun.pl (Jarek Zgoda)
Date: Sat, 3 Jan 2004 07:54:19 +0000 (UTC)
Subject: Text-to-HTML processing program
References: <slrnbvcm32.122.philh@cabalamat.cabalamat.org>
Message-ID: <bt5sfb$aph$2@nemesis.news.tpi.pl>

phil hunt <philh at invalid.email.address> pisze:

> Does anyone know of a text-to-HTML processing program, ideally
> written in Python because I'll probably be wanting to make small
> modifications to it, which is simple and straightforward to use
> and which uses a simple markup language (something like Wikipedia
> markup would be ideal)?

Try PyTextile: http://www.diveintomark.org/projects/pytextile -- it's
Python implementation of Dean Allen's original PHP Textile.

-- 
Jarek Zgoda
Unregistered Linux User #-1
http://www.zgoda.biz/ JID:zgoda-a-chrome.pl http://zgoda.jogger.pl/


From alexander.dejanovski at laposte.net  Tue Jan 13 12:43:01 2004
From: alexander.dejanovski at laposte.net (Alexander DEJANOVSKI)
Date: Tue, 13 Jan 2004 18:43:01 +0100
Subject: JyRetic EAI Server 1.0RC1 released
Message-ID: <5.1.0.14.2.20040113184248.03e9fc10@127.0.0.1>

Retic goes Jython now, and is thus fully compatible with the Java platform. 
(I won't develop no more on the former Python version of Retic. )
This gives a better connectivity, particularly through JDBC and JMS.
Jython 2.1 is included in the release.

Download on the sourceforge project's site => 
http://sourceforge.net/projects/retic

Available sources are : file, FTP, HTTP, JMS, SOAP, JDBC, XMLBlaster

Available pipes are : Zip, Unzip, Flat-to-XML, XML-to-Flat, XPath, XSLT, 
FOP (to produce PDF or PS from XSL-FO input), Excel (to produce MS Excel 
files from Gnumeric-XML input)

Available sinks are : file, FTP, HTTP, JMS, SOAP, JDBC, XMLBlaster, Jabber 
(open source instant messaging), shell, SMTP, Xindice (Apache's XML database)

Two new kinds of components have appeared in this release :
Preprocessors and Postprocessors : executed only once respectively before 
and after adaptor execution.

Available preprocessors : SQL, Xindice (much more to come)
Available postprocessors : SQL (much more to come)

The logging system is now based on log4j (I've added a Jabber appender 
(IMAppender), thanks to orange-soft.com).

Adaptors can be launched through command-line, XMLRPC calls (retic 
administrator uses it) or JMS queue (the server has to be listening your 
queue).

Retic also has now a scheduler.

I know docs aren't up-to-date but I'll fix that real soon.

=============================================================
WHAT IS RETIC ?

Retic is an EAI Server.
The aim is to permit applications to communicate, even if they
don't speak the same language (which means transport protocols
as well as data structures).
This is done by building adaptors. An adaptor is composed of :
         - One source
         - Several pipes (process data transformations)
         - Several sinks (destination of data)
         - Several loggers (using log4j)
         - Preprocessors (executed only once before adaptor execution - for 
example => drop/create a table through a SQL query)
         - Postprocessors (executed only once after adaptor execution - for 
example => creation of an index on a table through a SQL query)

It is written in Jython and works 100% fine with only Java 1.3+ installed 
on your system (jython 2.1 is embedded in the releases).

=============================================================


I've also released a reworked version of Retic Administrator (1.0) the GUI 
to create adaptors, and control the server.

Yet another piece of software released is reticSOAP, a small tool that 
parses WSDL and permits to :
- test SOAP services
- See the messages exchanged

Both Retic Admin and Retic SOAP come as a win32 release or a wxPython 2.4 
source file release (Python 2.3+ needed).


Enjoy !! 




From usenet_spam at janc.invalid  Thu Jan  8 20:23:58 2004
From: usenet_spam at janc.invalid (JanC)
Date: Fri, 09 Jan 2004 01:23:58 GMT
Subject: NNTP Server for this group
References: <eee18d22.0401072316.37ccff69@posting.google.com>
Message-ID: <Xns946B1868BB1A6JanC@213.119.4.35>

jonas at jonasgalvez.com (Jonas Galvez) schreef:

> Can anyone recommend a good NNTP server for accessing this group?

For this and most other text groups: <http://www.individual.net/>

-- 
JanC

"Be strict when sending and tolerant when receiving."
RFC 1958 - Architectural Principles of the Internet - section 3.9


From prof_888 at hotmail.com  Thu Jan  8 17:36:39 2004
From: prof_888 at hotmail.com (ChrisD)
Date: 8 Jan 2004 14:36:39 -0800
Subject: unable to register PythonService.exe
Message-ID: <c168f829.0401081436.48e2f920@posting.google.com>

I'm running Python 2.3.3 with Win32 extensions win32all-163.  I'm
working through Chapter 18 of Mark Hammond's excellent "Python
Programming on Win32".  On page 350 the simple NT service example
requires that the PythonService.exe program be registered.  However,
when I attempt it I get this error:

---------------------------------
C:\Python23\Lib\site-packages\win32>PythonService /register
Registering the Python Service Manager...
Fatal Python error: PyThreadState_Get: no current thread

abnormal program termination
---------------------------------

Any thoughts on how I can fix this problem?

thank you!


Chris


From skip at pobox.com  Thu Jan 29 14:47:44 2004
From: skip at pobox.com (Skip Montanaro)
Date: Thu, 29 Jan 2004 13:47:44 -0600
Subject: isinstance() bug
In-Reply-To: <20040129170037.GF18498@unpythonic.net>
References: <E1AmFB0-0004sv-El@mail.python.org>
	<20040129170037.GF18498@unpythonic.net>
Message-ID: <16409.25440.195276.497839@montanaro.dyndns.org>


    Skip> You need to compare inode numbers to see if you have the same or
    Skip> different files.
    ...
    Michs> really a good idea, Skip.

    Jeff> I'd have to come out on the -1 side.

I wasn't necessarily proposing that the current behavior ought to be
changed.  I hadn't considered all the subtle possibilities of such a change,
but in another msg suggested there would be some.

    Jeff> First, because it adds complications to the interpreter simply to
    Jeff> notify a programmer of an avoidable problem that should be caught
    Jeff> by testing.

I suspect some people would disagree with you on this (that it's simply
complicating the interpreter to get rid of an avoidable problem - I don't
know what you meant about "notify a programmer"; I don't envision
notification if such a change were implemented).

    Jeff> Second, I'm not convinced that you won't create some other kind of
    Jeff> problem through cleverness.

Agreed.

    Jeff> Third, I'm not convinced that using inode numbers is guaranteed to
    Jeff> work.  In Unix, it at least needs to be the tuple (inode, device),
    Jeff> because the same inode number can appear on multiple devices.  

Correct.  My mistake.

I agree with you about all the other nasty corner cases.

Skip



From jcarlson at nospam.uci.edu  Mon Jan 26 15:24:33 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Mon, 26 Jan 2004 12:24:33 -0800
Subject: I support PEP 326
In-Reply-To: <e838aa6e.0401261158.513e0389@posting.google.com>
References: <mailman.654.1074788734.12720.python-list@python.org>
	<10105bn3bsi63c9@news.supernews.com>
	<e838aa6e.0401261158.513e0389@posting.google.com>
Message-ID: <bv3t62$mb9$1@news.service.uci.edu>


> +1 on the PEP.  The names Max and Min seem fine to me, but I'm not
> married to them.
> 
> What would be the consequence of making Min and None compare equal? 
> Then the "None as second lowest" issue goes away.  I can't think of an
> example where that would cause problems, but there probably are
> some...

The issue is that when Min and None are in a sequence that gets sorted, 
you can end up with Minimums and Nones getting interspersed like so:
[Min, None, Min...]

In general, that behavior is frowned upon.

  - Josiah




From dj00302003 at yahoo.com  Sat Jan 17 19:33:55 2004
From: dj00302003 at yahoo.com (Jay Davis)
Date: 17 Jan 2004 16:33:55 -0800
Subject: Webbrowser and Mozilla control on linux
Message-ID: <1d17eeb7.0401171633.170e313a@posting.google.com>

I can launch a browser on linux with the webbrowser module
and the .open() method.  However, I want to be able also to
control the browser, specifically, I'd like to be able to 
go to a URL and invoke the automatic form filler and post
the form, all from within a python script.

I have google'd around and I see hints that there are remote
controller objects for some browsers, but so far I haven't
found any examples of code that controls the browser; most
examples just open the browser, which I could just as well
do from os.system(). 

If anyone can share some samples, or point me to a good
reference with browser control details, I'd much appreciate
it.  Thanks!

J.D.


From francisgavila at yahoo.com  Sun Jan 11 13:46:28 2004
From: francisgavila at yahoo.com (Francis Avila)
Date: Sun, 11 Jan 2004 13:46:28 -0500
Subject: Providing Default Value for User Input
References: <e3b4dc29.0401101643.3ea15ae3@posting.google.com>
	<1001kcqqk9ic2cc@corp.supernews.com>
Message-ID: <10036i3a6m4nv47@corp.supernews.com>

Francis Avila wrote in message <1001kcqqk9ic2cc at corp.supernews.com>...
>This question is entirely too vague, because the answer depends entirely
>upon your implementation and has nothing to do with Python per se.
...
>
>As a shot in the dark, why not just look at what the user types?  If it's

As Miki showed me, even is saying the question is too vague, I *already*
assumed too much in my answer to you, namely, that you were using a CLI.  I
don't even know that.

So you see the problem with your question?  We're glad to help, but you need
to give us more specific information.
--
Francis Avila



From woodsplitter at rocketmail.com  Thu Jan  8 16:27:49 2004
From: woodsplitter at rocketmail.com (David Rushby)
Date: 8 Jan 2004 13:27:49 -0800
Subject: Newbie: Getting Image From Disk into Buffer
References: <mailman.180.1073487526.12720.python-list@python.org>
Message-ID: <7876a8ea.0401081327.6fff63fc@posting.google.com>

"Ashley Lloyd" <ashleylloyd at hotmail.com> wrote in message news:<mailman.180.1073487526.12720.python-list at python.org>...
> I have been trying to get an image into an interbase database (see earlier 
> post), and came across a post made on a list some time ago (I ignored it 
> earlier as we use kinterbasDB not gvib, but I thought I'd try using it in 
> kinterbasDB anyway):
> ...
> it always seems to place 
> into the database a string of either the name of the image on disk 
> ('c:/image.bmp', say), or text such as the following:
> <open file 'c:/image.bmp', mode 'rb' at 0x009F06A0>

In the 'c:/image.bmp' case, you're inserting the file's name (string);
in the "<open file 'c:/image.bmp', mode 'rb' at 0x009F06A0>" case,
you're inserting an open file object, which is repr()ed into a string
for storage.  Instead, you need to insert the *contents* of the file
as a string, e.g., the return value of the file object's read()
method.

> ... but if someone could tell me how I get the image into blob_data 
> (which I assume is a buffer), I'd be very grateful.

http://sourceforge.net/forum/forum.php?thread_id=889866&forum_id=30917


From tjreedy at udel.edu  Thu Jan 15 18:39:40 2004
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 15 Jan 2004 18:39:40 -0500
Subject: Bug or feature?
References: <bu58st$1ha3$1@news.rtcomm.ru>
	<3dtid1-594.ln1@beastie.ix.netcom.com>
Message-ID: <ZvidncM7G8svuZrdRVn-jA@comcast.com>


"Dennis Lee Bieber" <wlfraed at ix.netcom.com> wrote in message
news:3dtid1-594.ln1 at beastie.ix.netcom.com...
> Alexey Nezhdanov fed this fish to the penguins on Wednesday 14 January
> 2004 21:40 pm:
>
> > Case 1 and case 2 prints out different calues (1 and 2 respectively).
> > Do not know - if this is a bug or feature of python.
> >
>         It's a problem with using what I would consider a side effect...
And
> not understanding that "variables" are not memory addresses.

In particular, the problem with both modifying in place (the side effect)
and returning a value.  I see a little better Guido's reason for having
list modification methods return None.  While chaining is not too
problematical, object returns would allow list expressions mixing implicit
and overt effects with possible puzzles similar to the one presented in
this thread.

Terry J. Reedy




From kbk at shore.net  Sat Jan 31 18:16:53 2004
From: kbk at shore.net (Kurt B. Kaiser)
Date: Sat, 31 Jan 2004 23:16:53 GMT
Subject: pythonwin woes
References: <a7c2c93c.0401301309.4e61c606@posting.google.com>
	<bveron$1h6n$1@arachne.labyrinth.net.au>
Message-ID: <878yjnzp22.fsf@hydra.localdomain>

Mark Hammond <mhammond at skippinet.com.au> writes:

> IDLE runs all programs in a new, external Python process, so never
> sees this issue.  In lots of ways, I like the way Pythonwin does it -
> keeping that state around can be very useful - eg, after the program
> has terminated, you can still see the objects etc.

The IDLE in Python 2.3 does use an external process, which, as you
say, completely avoids the reload/import dance.  It also substantially
separates the user's code from the IDLE code.

However, I should make it clear that IDLE's Python shell (which also
serves as the output window) looks at the subprocess and continues to
reflect the state of the most recent run of the program.  That is
indeed useful for inspecting the entrails and testing, and was a key
requirement during IDLE's re-design.

Run/Run Module (F5) will create a fresh subprocess, connect the Shell
window to it, and restart the program from scratch.  There is an
autosave feature, so re-running a program following modification is
one keystroke.  This is now the preferred way to use IDLE, rather than
initiating a re-run from the Shell window with reload() etc, though
that is still possible.

The shell's state will persist until it's restarted or F5 is keyed.
That is indicated with a   ====== RESTART =====  in the Shell window,
followed by any output from the new run.

It is still possible to copy lines and blocks of code forward in the
shell, even if they belong to a previous run.  That capability is very
useful for testing during development.

-- 
KBK


From somebody at nowhere.com  Fri Jan  9 16:45:52 2004
From: somebody at nowhere.com (Sean Richards)
Date: Sat, 10 Jan 2004 10:45:52 +1300
Subject: Problem with OpenGL.GLUT
References: <7447dd2a.0401071402.2c0737e6@posting.google.com>
	<btn17b$97bnn$1@ID-130333.news.uni-berlin.de>
Message-ID: <87oetchk33.fsf@hugin.valhalla.net>

"Cousin Stanley" <CousinStanley at hotmail.com> writes:

> Steven .... 
>
>   I'm also having  import  problems 
>   with a Win98 installation of PyOpenGL for Python 2.3
>   from .... 
>
>       http://prdownloads.sourceforge.net/pyopengl
>             /PyOpenGL-2.0.1.07.py2.3-numpy23.exe?download
>
>   Any of the test programs in the Demo folder
>   that attempt  from OpenGL.GLUT  fail 
>   as does a direct import attempt 
>   from the Python interpreter ....
>
> python
> Enthought Edition build 1028
> Python 2.3 (#46, Aug 11 2003, 09:34:05) [MSC v.1200 32 bit (Intel)] on win32
> Type "help", "copyright", "credits" or "license" for more information.
>>>>
>>>> from OpenGL.GLUT import *
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> ImportError: DLL load failed: One of the library files needed to run this applic
> ation cannot be found.
>
> Using  < dependency walker >  to examine .... 
>
>        /site-packages/OpenGL/GLUT.pyd 
>
> shows .... glut32.dll  * Not Found * 
>
> I've done a few searches on Google,
> but as yet haven't turned up what
> seems to be a compatible version 
> of this particular missing DLL file .... 
>
> Hopefully, someone here might know
> how to resolve this .... 
>
> -- 
> Cousin Stanley
> Human Being
> Phoenix, Arizona

I use the glut DLLs from here[1] with PyOpenGL on NT and I am pretty sure
that the GLUT examples worked OK. I haven't got access to that machine
at the moment so I can't check. But if you haven't already tried the
DLLs from[1] perhaps they might work for you.

[1] http://www.xmission.com/~nate/glut.html

Sean
-- 
"Hver sin smak", sa vintapperen, han drakk mens de andre sloss.


From timr at probo.com  Fri Jan 16 01:03:13 2004
From: timr at probo.com (Tim Roberts)
Date: Thu, 15 Jan 2004 22:03:13 -0800
Subject: Printing to console, no scroll
References: <mailman.364.1074102636.12720.python-list@python.org>
Message-ID: <leve00hlv7lu2bmqqua8gpgt160nccae7k@4ax.com>

"Totte Karlsson" <mtk at qm.com> wrote:
>
>How can I print to the console without having it scrolling to a new line for
>each print statement?
>I want to print a count down in the console, but for each count it scrolls
>the screen (of course).
>
> Is there another way?
>
>Here is the simple script for now
>
>print "Closing window in :"
>for second in range(10):
>    time.sleep(1)
>    print `10-second` +" seconds"

print "Closing window in : "
for second in range(10,0,-1):
    print "%2d\x08\x08\x08" % second,
    time.sleep(1)

-- 
- Tim Roberts, timr at probo.com
  Providenza & Boekelheide, Inc.


From tjreedy at udel.edu  Mon Jan 26 18:26:56 2004
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 26 Jan 2004 18:26:56 -0500
Subject: Deleting objects
References: <a33a46fe50e2ab07720a1118aa22d576@news.teranews.com>
	<bv44bj$cln$1@sea.gmane.org>
Message-ID: <bv47nh$k29$1@sea.gmane.org>


> > for t in db.tables:
> > del t

As Gerrit said, this is equivalent to 'pass'.

db.tables = [] # or
db.tables[:] = [] # or
db.cleartables()

is more likely to work.  But a db.close() method should contain what will
work.

TJR








From robert_dodier at yahoo.com  Thu Jan 29 18:59:27 2004
From: robert_dodier at yahoo.com (Robert Dodier)
Date: 29 Jan 2004 15:59:27 -0800
Subject: Safe to modify globals(), or not?
Message-ID: <6714766d.0401291559.45413e0d@posting.google.com>

Hello,

I'm interested in introducing new variables into the environment
of a Python interpreter or program. 

In reading through old posts to this newsgroup, I see there is
an often-repeating warning against modifying the contents of locals().
Fair enough. However, is there anything wrong with modifying globals()
?

In the list of built-in functions
(http://www.python.org/doc/lib/built-in-funcs.html)
locals() has an explicit warning, globals() doesn't. Does that mean
it's safe to modify globals() ?

By the way, is there another way to introduce a new variable into
a scope (local or global) other than assigning directly to the 
dictionary returned by locals() or globals() ?

Just some context -- I want to parse strings written in a 
"little language" and then have new variables show up in the Python
environment so the user can manipulate them. E.g.,

  >>> parse_funky_language("Hey, this is far out, man.")
  >>> Hey.part_of_speech
  Interjection

Any light you can shed on this issue will be appreciated.
Thanks for not getting distracted about whether this is useful. 

regards,
Robert Dodier
--
If I have not seen as far as others, it is because 
giants were standing on my shoulders. -- Hal Abelson


From zapazap at yahoo.com  Sun Jan 25 20:06:49 2004
From: zapazap at yahoo.com (zapazap)
Date: 25 Jan 2004 17:06:49 -0800
Subject: -- Pythonic control of Windows GUI application: tabs and listviews
Message-ID: <4b3b1124.0401251706.6cf67f27@posting.google.com>

-- Pythonic control of Windows GUI application: tabs and listviews

Dear Snake-charming Gurus,

I have learned to manipulate some controls ("Button", "ComboBox", etc)
through such means as:

    win32gui.SendMessage(hwnd, win32con.BM_GETCHECK, 0 ,0)
    win32gui.SendMessage(hwnd, win32con.CB_GETCOUNT, 0 ,0)

provided by Python Win32 Extensions, and understand that such
constants as:

    win32con.BM_GETCHECK
    win32con.CB_GETCOUNT

corresponding to distinct messages (documented at [1] and [2]) that
can be sent to such controls.

For the "List-View" and "Tab" controls then, I expected to find the
constants

    win32con.LVM_GETCHECK       
    win32con.TCM_GETITEMCOUNT   

corresponding to the distinct messages documented at [3] and [4]. 
Unfortunately the module win32com module does not have any LVM_* or
TCM_* attributes, and I have not found reference to such constants in
the Extensions documentation.


I want to control a windows app through the GUI, but I do *not* want
to resort to 'mouseclick/keypress recorder' type tools.  For now, I
seem to be able to work the Button and Combobox controls for a target
window while another window is running full screen mode, and I want to
keep it that way.  But some of the controls I need can be reached only
by mamipulating Tab and Listview controls.

Do you have any advice on how I might control these controls in a way
similar to my controling Buttons and Comboboxes?  Or, failing that, do
you have an entirely different route for me controlling one app while
a second is running maximized?

Much thanks!!
- Bryan Hann
 

[1] http://msdn.microsoft.com/library/default.asp?url=/library/en-us/shellcc/platform/commctls/buttons/buttonreference/buttonmessages/bm_getcheck.asp
[2] http://msdn.microsoft.com/library/default.asp?url=/library/en-us/shellcc/platform/commctls/comboboxes/comboboxreference/comboboxmessages/cb_getcount.asp
[3] http://msdn.microsoft.com/library/default.asp?url=/library/en-us/shellcc/platform/commctls/listview/messages/lvm_getitemcount.asp
[4] http://msdn.microsoft.com/library/default.asp?url=/library/en-us/shellcc/platform/commctls/tab/messages/tcm_getitemcount.asp


From philh at invalid.email.address  Sat Jan  3 00:51:33 2004
From: philh at invalid.email.address (phil hunt)
Date: Sat, 3 Jan 2004 05:51:33 +0000
Subject: Text-to-HTML processing program
Message-ID: <slrnbvcm32.122.philh@cabalamat.cabalamat.org>

Does anyone know of a text-to-HTML processing program, ideally
written in Python because I'll probably be wanting to make small
modifications to it, which is simple and straightforward to use
and which uses a simple markup language (something like Wikipedia
markup would be ideal)?


-- 
"It's easier to find people online who openly support the KKK than 
people who openly support the RIAA" -- comment on Wikipedia
(Email: <zen20000 at zen.co.ku>, but first subtract 275 and reverse 
the last two letters).  




From jcarlson at nospam.uci.edu  Wed Jan 28 14:42:28 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Wed, 28 Jan 2004 11:42:28 -0800
Subject: PEP 326 is D-E-A-D (big frownie face)
In-Reply-To: <bv8pru$f64$1@panix1.panix.com>
References: <40158680$0$7044$ba620e4c@news.skynet.be>
	<20040126235704.GD13453@siliconimage.com>
	<mailman.850.1075209472.12720.python-list@python.org>
	<eN+FAls/KHIb089yn@the-wire.com> <bv8pru$f64$1@panix1.panix.com>
Message-ID: <bv93f7$ov7$1@news.service.uci.edu>

Aahz wrote:

> In article <eN+FAls/KHIb089yn at the-wire.com>,
> Mel Wilson <mwilson at the-wire.com> wrote:
> 
>>Even then, what about PEP 326, which presumes to define highest and
>>lowest objects that can be compared with anything?
> 
> 
> What about it?  ;-)
> 
> (Guido just posted a Pronouncement rejecting it.)

When I get around to posting the final version with an example module, 
people can still use it if they want.
  - Josiah


From wlpqasyj at vkoparwi.com  Thu Jan 22 05:39:14 2004
From: wlpqasyj at vkoparwi.com (M.B (ml))
Date: Thu, 22 Jan 2004 10:39:14 GMT
Subject: $$$ Im at a loss for words THIS WORKS $$$
Message-ID: <mLNPb.66652$7JB1.2925@news04.bloor.is.net.cable.rogers.com>

 MAKE MONEY!!!MAKE MONEY!!!


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I found this on a bulletin board and decided to try it: I don't care
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$9,612.00 and more mail kept coming in!! This is now my fourth week and I
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Let me tell you how this works and most important, why it
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also make sure you print this out NOW, so you can get the information
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mailing lists is secondary to income which is made from people like
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each piece of paper "PLEASE PUT ME ON YOUR MAILING LIST."
Now get 6 U.S. $1.00 bills and place ONE inside of EACH of the six
pieces of paper so the bill will not be seen through the envelope (to
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12 Briggate
Elland Bridge
Elland
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1/264 Tor St
Toowoomba QLD
4350 Australia

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Change anything you need to but try to keep this article as close to
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either on a computer or hard copy and keep the notes people send you.
This VERIFIES that you are truly providing a service.  (Also, it might
be a good idea to wrap the $1 bill in dark paper to reduce the risk of
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carefully followed, all members will be reimbursed for their
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*****DIRECTIONS FOR HOW TO POST TO NEWS GROUPS!!!*****

STEP ONE: You do not need to re-type this entire letter to do your own
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will copy the entire letter into the computer's memory.

STEP TWO:
Open a blank 'notepad' file and place your cursor at the top
of the blank page. From the 'edit' menu select 'paste'. This will
paste a copy
of the letter into the notepad so that you will add your name to the
list.

STEP THREE:
Save your new notepad file as a text file. If you want to do your
posting in different settings, you'll always have this file to go back
to.

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You can use a program like "postXpert" to post to all the newsgroups
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Use Netscape or Internet Explorer and try searching for various new
groups (on- line forums, message boards, chat sites, discussions.)

STEP FIVE:
Visit message boards and post this article as a new message by
highlighting the text of this letter and selecting paste from the edit
menu. Fill in the subject, this will be the header that everyone sees
as they scroll through the list of postings in a particular group,
click the post message button. You're done.

Congratulations!!!!!!

THAT'S IT!! All you have to do, and It Really works!!!

Best Wishes






From reply.in.the.newsgroup at my.address.is.invalid  Fri Jan 23 06:30:50 2004
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Fri, 23 Jan 2004 12:30:50 +0100
Subject: cgi concurrency approaches?
References: <7x7jzjgso7.fsf@ruckus.brouhaha.com>
	<66s11056aptit3vd2inv3p3r07v95k52ha@4ax.com>
	<mailman.682.1074853651.12720.python-list@python.org>
Message-ID: <fe1210lp2q85krp6r6ms5o9nk22h2q4nk0@4ax.com>

Matt Goodall:
>Rene Pijlman:
>> Use mod_python and keep the counter in a Python variable
>
>That will only work if you use Apache 2 in threaded mode.

Of course, good point.

-- 
Ren? Pijlman


From a9804814 at unet.univie.ac.at  Thu Jan  8 15:40:08 2004
From: a9804814 at unet.univie.ac.at (Thomas Mang)
Date: Thu, 08 Jan 2004 20:40:08 GMT
Subject: books
Message-ID: <3FFDC029.AB0A4097@unet.univie.ac.at>

Hello,

I have programmed mostly in C++ lately, and I want to start learning
Python now.

Which books would you recommend to buy?

I am both looking for an introduction into the language, as well as
complete guides.



thanks for your responses,

Thomas



From tim.one at comcast.net  Mon Jan 12 18:10:04 2004
From: tim.one at comcast.net (Tim Peters)
Date: Mon, 12 Jan 2004 18:10:04 -0500
Subject: Python is far from a top performer according to benchmarktest...
In-Reply-To: <ZGsHWLAELyAAFw4h@jessikat.fsnet.co.uk>
Message-ID: <LNBBLJKPBEHFEDALKOLCMEDDIFAB.tim.one@comcast.net>

[Lothar Scholz]
>> Fortran does not have this problem so a lot of optimizations can be
>> done and values can be hold in registers for a much longer time,
>> resulting in much greater speed.

[Robin Becker]
> I'm not sure I agree with the above. Aliases could certainly occur in
> fortran 77, I haven't used 90 so can't say for sure.

That's the magic of Fortran:  the F77 standard says (in part):

    If a subprogram reference causes a dummy argument in the
    referenced subprogram to become associated with another
    dummy argument in the referenced subprogram, neither
    dummy argument may become defined during execution of
    that subprogram.

It bascially says you can alias all you want, so long as you only read the
aliased entities and don't modify them.  If effect, if you do anything with
aliases that would inhibit optimizations that assume there isn't any
aliasing, then it's your *program* that's not legitimate Fortran.  The
Fortran standard has lots of text "like that", imposing (often unenforcable)
restrictions on conforming programs for the benefit of optimizing compilers.
That was the right choice for Fortran's audience.




From fwang2 at yahoo.com  Fri Jan 30 16:09:16 2004
From: fwang2 at yahoo.com (oliver)
Date: 30 Jan 2004 13:09:16 -0800
Subject: pythonwin woes
Message-ID: <a7c2c93c.0401301309.4e61c606@posting.google.com>

Hi,

I am trying my hands on the latest verion of pythonwin extension with
python 2.3.3 , and run into *semi-fatal* problem:  the run command
ignores the modifications I made to the source code,  and *always*
show me results given by that outdated source: it feels like it just
use that cached .pyc!!!

I wonder if the other pythonwin users had experienced the same
problem, or did I miss anything here. There is no such problem in IDLE
though.

Thanks

oliver


From exarkun at intarweb.us  Wed Jan 14 10:35:16 2004
From: exarkun at intarweb.us (Jp Calderone)
Date: Wed, 14 Jan 2004 10:35:16 -0500
Subject: I come not to bury C++, but to praise it...
In-Reply-To: <bu3khe$dbm5v$1@ID-46268.news.uni-berlin.de>
References: <mailman.337.1074032524.12720.python-list@python.org>
	<bu1uul$cam92$1@ID-46268.news.uni-berlin.de>
	<cu%Mb.47396$8H.99443@attbi_s03>
	<bu3khe$dbm5v$1@ID-46268.news.uni-berlin.de>
Message-ID: <20040114153516.GA16224@intarweb.us>

On Wed, Jan 14, 2004 at 09:42:52AM -0500, Derek wrote:
> [snip]
> 
> I also use C++ and Python as my main languages and I agree with your
> comments.  However, I don't agree that Python is inherently "safer"
> than C++.  At best I see it as a tie.  For example, C++ let's you
> corrupt memory among other "unsafe" things, most of which can be
> avoided by using standard containers, smart pointers, etc.  Python
> lets you do "unsafe" things such as passing an object to a function
> when it makes no sense to do so, which can lead to nasty runtime
> surprises.
> 

  A traceback is *much* less nasty than memory corruption.  One stops the
program immediately and shows you exactly where the problem lies, the other
may let the program run for quite a long time before simply causing the
process to die, leaving few clues as to the source of the problem.

  Python may not be *completely* safe (indeed, memory corruption is still
possible due to bugs in the interpreter and extension modules), but it is
quite a bit safer than C++.

  Jp



From rainerd at eldwood.com  Thu Jan 29 17:17:39 2004
From: rainerd at eldwood.com (Rainer Deyke)
Date: Thu, 29 Jan 2004 22:17:39 GMT
Subject: Rookie question about data types (hashtables)
References: <Xns947EF14E03FAEgeneralsteveperkins@130.133.1.4>
	<dv0Sb.135681$sv6.731227@attbi_s52>
	<Xns947F82D7C736Fgeneralsteveperkins@130.133.1.4>
Message-ID: <7EfSb.139694$sv6.756780@attbi_s52>

Steve D. Perkins wrote:
>> Sounds like a sorted list would work best.  A binary search (see the
>> bisect module) lets find all matches in O(log n) time.
>
>
>     Hmm... a double-linked-list with recursion, like back in Freshman
> Programming 101?

I was thinking about a standard Python list, which is actually implemented
as an array, not a linked list.  Binary searches don't work on linked lists.


-- 
Rainer Deyke - rainerd at eldwood.com - http://eldwood.com




From mensanator at aol.com  Wed Jan 14 21:09:05 2004
From: mensanator at aol.com (mensanator)
Date: 14 Jan 2004 18:09:05 -0800
Subject: Printing to console, no scroll
References: <mailman.364.1074102636.12720.python-list@python.org>
	<xqxr7y2sq9l.fsf@cola2.ca.boeing.com>
Message-ID: <fbf22ff1.0401141809.71d9f0ac@posting.google.com>

Harry George <harry.g.george at boeing.com> wrote in message news:<xqxr7y2sq9l.fsf at cola2.ca.boeing.com>...
> "Totte Karlsson" <mtk at qm.com> writes:
> 
> > Hi,
> > How can I print to the console without having it scrolling to a new line for
> > each print statement?
> > I want to print a count down in the console, but for each count it scrolls
> > the screen (of course).
> > 
> >  Is there another way?
> > 
> > Here is the simple script for now
> > 
> > print "Closing window in :"
> > for second in range(10):
> >     time.sleep(1)
> >     print `10-second` +" seconds"
> > 
> > thanks
> > /totte
> > 
> > 
> > 
> > 
> 
> You need to flush after the print statements.  If you have several
> prints (not just 1 as in this example), it is easier to hide in a
> separate function.
> 
> def msg(txt):
>     sys.stdout.write(txt)
>     sys.stdout.flush()
> 
> > for second in range(10):
> >     time.sleep(1)
> >     msg(`10-second` +" seconds ")  #add a space at the end to delimit
> > print    #to finish off the line

That produces

10 seconds 9 seconds 8 seconds 7 seconds 6 seconds 5 seconds 4 seconds 
3 seconds 2 seconds 1 seconds 



This will produce a true countdown - the messages overwite each other:

for sec in range(10):
	time.sleep(1)
	m = "%2d seconds" % (10-sec)
	msg(m + chr(13))

But this will only work on systems that properly handle control 
characters. It works from a Windows command prompt but doesn't from
Idle which shows that silly undefined character box (which I'll 
show here as []). So the Idle output looks like

10 seconds[] 9 seconds[] 8 seconds[] 7 seconds[] 6 seconds[] 
5 seconds[] 4 seconds[] 3 seconds[] 2 seconds[] 1 seconds[] 

which, when copied and pasted into Google, results in

10 seconds
 9 seconds
 8 seconds
 7 seconds
 6 seconds
 5 seconds
 4 seconds
 3 seconds
 2 seconds
 1 seconds

This is the reason why the PROPER way to end a new line is
with a carriage_return + line_feed and not simply line_feed.
It also worked properly from the shell in Cygwin, but I
don't have a real unix or linux system to try it on.


From python at hitmedia.com  Tue Jan 27 23:19:57 2004
From: python at hitmedia.com (Python Baby)
Date: Tue, 27 Jan 2004 20:19:57 -0800
Subject: little client + server app : has this been done?
Message-ID: <20040128041957.GA92182@mail.hitmedia.com>

I'm about to try a little test project in Python, but want to make sure
I'm on the right foot.

Any advice appreciated before I start this.  MOST important : I want
to make sure I'm not just re-inventing the wheel, if there's a library
out there that does this exact thing already.


SERVER:
Has some protected files, not in a webroot, that I want to let the client
download only if they pass me a verified key in the server's "OK" database.

CLIENT:
Knows which files it wants (by file id# not full path).  Knows its key to
get them.  Passes some kind of message to the remote server saying, "Here
is my key.  Here is the file I want."  Server replies by passing the file,
and a little metadata about the file.


Sound familiar?
Should I do it from scratch or is this just some well-known library I
don't know about?   (I searched around, of course, but couldn't find one.)

Thanks!




From Chuck at spears.com  Wed Jan 28 11:37:17 2004
From: Chuck at spears.com (Chuck Spears)
Date: Wed, 28 Jan 2004 11:37:17 -0500
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<n22Nb.11299$9k7.210522@news.xtra.co.nz>
	<bu2pgs$d123a$1@ID-207230.news.uni-berlin.de>
	<4004EC9E.1E2E2893@alcyone.com> <bu3iv2$n2u$4@tyfon.itea.ntnu.no>
Message-ID: <ojof1057b4o9kurh6a55f1rfan4d8v3l53@4ax.com>

>The conclusion may seem obvious to _you_ but this is no guarantee that
>everyone else also possesses this knowledge. OSS is being hailed as
>the second coming, and it comes as no surprise therefore that some
>people might be deluded into thinking they could harness this power to
>cure cancer overnight or land a man on Mars by 2005.
>
If you can get by his trolling and unbearable arrogance,  there are
some kernels of truth in there.  I come from a commercial background
as well but instead of trying to exploit the OSS community, ive been
lurking around looking for a project I feel I could contribute to. 

 Most geeks by their nature, are very independent and abhor order.
You have to have order to get anything done.  Thats why most
successful projects have one or at most a few people pulling the
strings because if you don't, the project will flounder.   I've
personally based a few of my projects on some OSS projects and they
failed miserably.  Because of the bugs and the Authors unwilligness to
address them or even accept them as bugs.  You can say "well why didnt
you just fix it yourslef" but I just didnt have the time.

On the other side of the coin, i've used OSS projects like PHP and
Postgres with great results.

The other problem with hobbyist geek programmers is they are just in
it for the fun of it.  They get bored when the last 10% of the project
which is mostly bug fixing and rengineering code coes about and
generally abandon it.  I've poked into literally over one hundred
sourceforge projects that started out as good ideas and had lots of
activity.  i'd come back in 6 months and There would be almost no
activity.  With a developer with a commericial background, he might be
more willing to see the project through.

I too get annoyed when an OSS author pulls a massive library into his
project just to get a few functions out of it he could have written
himself.  It's really problematic as Brandon has said when you are
using CygWin or Ming because a lot of these libraries dont work on it.

My bread and butter is palm and windows development so I cannot
abandon the platform yet.  What i've been trying to do is build up a
nice linux dev environment using ming and python.  The python side of
things works great but the C++ side... well.. sucks.    

Thankfully, I finally decided to evaluate VMWare and being able to run
linux and windows together has been a godsend so I can hopefully
abandon the cygwin stuff.  




From db3l at fitlinxx.com  Mon Jan 12 11:34:33 2004
From: db3l at fitlinxx.com (David Bolen)
Date: 12 Jan 2004 11:34:33 -0500
Subject: How to insert into listbox using wxPython
References: <vvr25kjnd5n397@corp.supernews.com>
	<3ffda907$0$572$b45e6eb0@senator-bedfellow.mit.edu>
	<vvrec7d5bs4ve6@corp.supernews.com>
	<p2yLb.5996$5V2.10467@attbi_s53>
	<vvthjc3ta6lme1@corp.supernews.com>
Message-ID: <u7jzx15ye.fsf@fitlinxx.com>

"Andrew" <na> writes:

> I typed what you wrote
> 
> for x in self.results:
>     self.listbox.Append(x[0])
> 
> and I got the same error as what I had tried earlier
> 
> Traceback (most recent call last):
>   File "S:\GUI\MYSQL\mysqlgui.py", line 65, in OnB2Button
>     self.listbox.Append(x[0])
>   File "F:\Python22\Lib\site-packages\wxPython\controls.py", line 78, in
> Append
>     val = controlsc.wxControlWithItems_Append(self, *_args, **_kwargs)
> TypeError: String or Unicode type required
> 
> Any help is alway's appreciated

Your database query is returning a list of tuples, where each element
in the tuple is a column from your database that is part of the query
(or all columns in the table with your query of *).  The tuple is not
a string, which is what the wxListBox understands how to display.

I expect that if you change the code to:

    self.listbox.Append(str(x[0]))

you'll get rid of the error, since that will provide a string
representation of the tuple x[0], but I also expect it won't be
exactly what you want depending on the database columns, and/or the
way certain data types automatically turn themselves into strings.

In the end you'll probably want to process each entry in 'results'
according to your own desires for display purposes, formatting an
appropriate string to be put into the ListBox.  You may also find that
using a wxListCtrl in wxLC_REPORT mode fits well since it will make it
simpler to divide the columns of data (either that or a wxGrid,
although wxGrid is probably overkill).

-- David


From exarkun at intarweb.us  Thu Jan  1 01:16:33 2004
From: exarkun at intarweb.us (Jp Calderone)
Date: Thu, 1 Jan 2004 01:16:33 -0500
Subject: selecting a random item from a set
In-Reply-To: <yfsad58d36u.fsf@black132.ex.ac.uk>
References: <yfs3cb1ew6n.fsf@black132.ex.ac.uk> <3FF20AA3.7080603@v.loewis.de>
	<yfsn099d81a.fsf@black132.ex.ac.uk>
	<mailman.63.1072843171.8134.python-list@python.org>
	<yfsad58d36u.fsf@black132.ex.ac.uk>
Message-ID: <20040101061633.GA26751@intarweb.us>

On Wed, Dec 31, 2003 at 10:37:13PM +0000, Alexander Schmolck wrote:
> Jp Calderone <exarkun at intarweb.us> writes:
> > > > Alexander Schmolck wrote:
> > > Maybe not insensibly -- the fairly generic approach outlined above that will
> > > work for any iterable with len is clearly not desirable as default (because of
> > > its time complexity), and just using it as a fallback won't work either,
> > > because AFACT there is no way for `choice` to find out whether its argument is
> > > a sequence or not.
> > 
> > 
> >     def choice(self, seq):
> >         """Choose a random element from a non-empty sequence."""
> >         try:
> >             return seq[int(self.random() * len(seq))]
> >         except TypeError:
> >             # Fallback algorithm
> 
> choice(dict(1:"gets this", 2:"gets that", "three":"gets the key"))
> 

  This is as broken in the current choice implementation as in the one I
proposed.  I don't think it makes any difference to the question at hand.

  Jp



From ih8spam at spamtrap.com  Wed Jan 14 14:59:06 2004
From: ih8spam at spamtrap.com (WTH)
Date: Wed, 14 Jan 2004 14:59:06 -0500
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
	<40047290$1@news.012.net.il>
	<bu29ea$ct54l$1@ID-207230.news.uni-berlin.de>
	<4004AC8E.46A3104F@alcyone.com>
	<fNfNb.5633260$Of.890377@news.easynews.com>
Message-ID: <100b8c5rm4bdke6@corp.supernews.com>

> This reminds me of the old expression: "A winner never quits. A quitter
> never wins.  But if you never win and never quit, you're a fucking idiot."

I've seen that anti-motivational poster :).  LOL.

    WTH




From brian at sweetapp.com  Fri Jan  9 03:11:32 2004
From: brian at sweetapp.com (Brian Quinlan)
Date: Fri, 09 Jan 2004 00:11:32 -0800
Subject: Lua: further investigation and comparisons with Python and Forth
In-Reply-To: <pan.2004.01.09.04.40.25.626208@yahoo.com>
Message-ID: <004501c3d688$3124fdb0$0000fea9@dell8200>

> > Before reading about Open Firmware, I had assumed that Forth had
> > completely dropped out of sight. Anyone else aware of 
> > counterexamples?
> 
> I know that Sun systems have a forth based boot system.

Which is Open Firmware, though Sun calls it something else.

Cheers,
Brian




From snake at penza-gsm.ru  Fri Jan 16 09:44:33 2004
From: snake at penza-gsm.ru (Alexey Nezhdanov)
Date: Fri, 16 Jan 2004 17:44:33 +0300
Subject: Bug or feature?
In-Reply-To: <ZvidncM7G8svuZrdRVn-jA@comcast.com>
References: <bu58st$1ha3$1@news.rtcomm.ru>
	<3dtid1-594.ln1@beastie.ix.netcom.com>
	<ZvidncM7G8svuZrdRVn-jA@comcast.com>
Message-ID: <bu8t4h$15d$1@news.rtcomm.ru>

Terry Reedy wrote:
> "Dennis Lee Bieber" <wlfraed at ix.netcom.com> wrote in message
> news:3dtid1-594.ln1 at beastie.ix.netcom.com...
> 
>>Alexey Nezhdanov fed this fish to the penguins on Wednesday 14 January
>>2004 21:40 pm:
>>
>>
>>>Case 1 and case 2 prints out different calues (1 and 2 respectively).
>>>Do not know - if this is a bug or feature of python.
>>>
>>
>>        It's a problem with using what I would consider a side effect...
> 
> And
> 
>>not understanding that "variables" are not memory addresses.
> 
> 
> In particular, the problem with both modifying in place (the side effect)
> and returning a value.  I see a little better Guido's reason for having
> list modification methods return None.  While chaining is not too
> problematical, object returns would allow list expressions mixing implicit
> and overt effects with possible puzzles similar to the one presented in
> this thread.
> 
> Terry J. Reedy

So since the word "problem" is so popular in this tred I have an another 
question:
Does anybody agree that this is a python problem and not a programmer 
problem?

Let me explain.
I DO know that this behaivoir of python is matches the DOCS and all 
declared official language laws.
I DO know why it is happening and how to fix my program to solve the 
problem (in fact I already knowed it when written my first post here).
I DO know that fixing on python level it will rise particular 
incompartibility with previous versions of python.
BUT
I know the case where such python behaivoir causes hard-to-catch problems.
I do not know any case (anybody knows? please give example) where such 
"feature" may be useful.

So I proposing to make a change into python and reverse the order of 
calculations.
Just for sure:
=== Order used now ===
## a+=a.Sub(b)
1. evaluate value of 'a'
2. evaluate value of 'a.Sub(b)'
3. evaluate the sum
4. store the result into 'a'
=== Proposed order ===
## a+=a.Sub(b)
1. evaluate value of 'a.Sub(b)'
2. evaluate value of 'a'
3. evaluate the sum
4. store the result into 'a'

(same about -=, *=,... of course)

--
Respectfully
Alexey Nezhdanov



From carroll at tjc.com  Sat Jan 24 13:41:16 2004
From: carroll at tjc.com (Terry Carroll)
Date: Sat, 24 Jan 2004 18:41:16 GMT
Subject: there is no exitfunc in sys module
References: <mailman.734.1074962312.12720.python-list@python.org>
Message-ID: <b1f510tvsg252j8kflfdhtbpjpfig8rlet@4ax.com>

On Sat, 24 Jan 2004 00:07:53 -0800 (PST), Hameed Khan
<hameedkhaan at yahoo.com> wrote:

>  i was reading the manual for sys module. i found a
> description for a function known as exitfunc. and it
> says the function installed by
> sys.exitfunc(cleanUpFunc) call will be called when the
> interpreter exits. but when i try to call this
> function on Python interactive prompt it says there is
> no attribute named exitfunc in sys module.

It doesn't exist by default.  It's a function that you set up to be
called at termination.  Try this::

  import sys

  def outtahere():
      print "Okay, I quit"

  sys.exitfunc=outtahere

  print "program starting"
  # do something
  print "program done, now exiting"



From dwall at fastmail.fm  Thu Jan  8 15:55:30 2004
From: dwall at fastmail.fm (David K. Wall)
Date: Thu, 08 Jan 2004 20:55:30 -0000
Subject: Looking for help with regular expressions- not Python Specific
References: <8d3e714e.0401072114.5bf3fba7@posting.google.com>
	<roy-796F67.09245808012004@reader2.panix.com>
Message-ID: <Xns946AA1FF3A7CAdkwwashere@216.168.3.30>

Roy Smith <roy at panix.com> wrote:

> I don't know of any regex-specific newsgroups or mailing lists, but most 
> old unix hands are pretty good at them, so asking in comp.unix.questions 
> might be worth trying.  Perl makes extensive use of regex, so I'll bet 
> you'll find some regex gurus on comp.lang.perl too.

Please use comp.lang.perl.misc instead.  comp.lang.perl "officially" does not 
exist, as it was rmgrouped in August 1995.  Some carelessly-administered news 
servers still carry it, unfortunately.

alt.perl is another possibility, and is perhaps a bit looser about what is 
considered on-topic for the newsgroup, but clpm tends to have more 
knowledgeable people.  (although some people frequent both c.l.p.m and a.p)

-- 
David Wall


From tim.golden at viacom-outdoor.co.uk  Tue Jan 27 04:23:10 2004
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Tue, 27 Jan 2004 09:23:10 -0000
Subject: winapi: mouseclick
Message-ID: <F1921F85572CB04D9F55B14BDC76B3E4434674@tdi_nt9.internal.viacom-outdoor.co.uk>

>From: Tim Golden [mailto:tim.golden at viacom-outdoor.co.uk]
>
>>From: KNS [mailto:netquest at sympatico.ca]
>>
>>> Can someone please suggest how to test for a mouse click using
>>> the WinAPI?  I have dispatched a windows application and would
>>> like to detect any mouseclicks (and keyboard entry for that 
>>matter)...
>>> 
>>
>
[... snip my original explanation via win32all / ctypes ...]

Or, alternatively, you can use PyGame (http://pygame.org) to
get lower-level control, obviously intended for games, but
quite able to be used for gui-type operations.

TJG

BTW I apologise for the loss of threading on these posts: I'm
using Outlook to reply to the mailing list, and it notoriously
doesn't thread properly. If anyone has a fix, please let me know.
Tim


________________________________________________________________________
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From jjl at pobox.com  Fri Jan 16 15:04:44 2004
From: jjl at pobox.com (John J. Lee)
Date: 16 Jan 2004 20:04:44 +0000
Subject: Why gmp is not in the standard library?
References: <4f0a9fdb.0401150211.615a7f45@posting.google.com>
	<m3hdyxv1mp.fsf@pc150.maths.bris.ac.uk>
	<4006b54e$0$560$b45e6eb0@senator-bedfellow.mit.edu>
	<mailman.400.1074182344.12720.python-list@python.org>
	<4006f74a$0$567$b45e6eb0@senator-bedfellow.mit.edu>
Message-ID: <87smif64o3.fsf@pobox.com>

Brian Kelley <bkelley at wi.mit.edu> writes:

> Skip Montanaro wrote:
> > Bdb's license is not GPL:
> >     http://www.sleepycat.com/download/oslicense.html
> 
> I stand corrected, it makes perfect sense that the Berkeley DB should
> be released using the Berkeley license :)  I don't know why I thought
> otherwise.
> 
> That being said, wasn't there some issue with making the Python
> License GPL compatible for issues like these?

Yes.

"GPL-compatible" is very different from "GPL", of course.


John


From bignose-hates-spam at and-benfinney-does-too.id.au  Wed Jan 21 21:11:43 2004
From: bignose-hates-spam at and-benfinney-does-too.id.au (Ben Finney)
Date: 22 Jan 2004 13:01:43 +1050
Subject: Identifing current function
References: <pan.2004.01.22.02.21.53.368742@doe.com>
Message-ID: <slrnc0udgf.flo.bignose-hates-spam@iris.polar.local>

On Thu, 22 Jan 2004 02:21:54 GMT, Brian Donovan wrote:
>   Is there a way to identify the current function. For example:
> 
> class A:
>    def B(self):
>       print current_function_name

Functions, like all objects, have no inherent name.  Names are bound to
objects; each object can have zero, one or more names bound to it.  None
of the names has any particular status as "the" name of the object.

-- 
 \          "I moved into an all-electric house. I forgot and left the |
  `\   porch light on all day. When I got home the front door wouldn't |
_o__)                                         open."  -- Steven Wright |
Ben Finney <http://bignose.squidly.org/>


From gerrit at nl.linux.org  Thu Jan 29 10:31:02 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Thu, 29 Jan 2004 16:31:02 +0100
Subject: sending mail cc, bcc
In-Reply-To: <000f01c3e67b$de344800$1603a8c0@pc22>
References: <000f01c3e67b$de344800$1603a8c0@pc22>
Message-ID: <20040129153102.GA24226@nl.linux.org>

Alberto Vera wrote:
> I have a library called smtplib that send email
> I use these lines to use it:  (from -->to)
> ------------------------------------
> server = smtplib.SMTP(server)
> server.sendmail(fromaddr, toaddrs, message)
> ------------------------------------
> 
> But I'd like to include some mails CC ,BCC.
> (from -->to)
> (       |-->cc )
> (       |-->bcc)
> 
> Does anyone have a library to make it? (mail: from, to, cc, bcc)

The 'message' string contains the headers. The information in this
string is not used to determine the recipients. So, you can do:

message = "From: Knight who says Ni <knight42 at ni.int>
To: Sir Galahad <galahad at brave.uk>
Cc: Sir Robin <robin at brave.uk>

Ni!
"""

...while you send it to someone else in reality:

server.sendmail("my at address.com", ["mother at isp.com", "father at isp.com"], message)

See also the online documentation.
Try it out!

yours,
Gerrit.

-- 
243. As rent of herd cattle he shall pay three gur of corn to the
owner.
          -- 1780 BC, Hammurabi, Code of Law
-- 
PrePEP: Builtin path type
    http://people.nl.linux.org/~gerrit/creaties/path/pep-xxxx.html
Asperger's Syndrome - a personal approach:
	http://people.nl.linux.org/~gerrit/english/
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From xpythonist at yahoo.com.br  Fri Jan 23 10:25:34 2004
From: xpythonist at yahoo.com.br (=?iso-8859-1?q?Aloysio=20Figueiredo?=)
Date: Fri, 23 Jan 2004 12:25:34 -0300 (ART)
Subject: file open problem
In-Reply-To: <20040123143808.80139.qmail@web14702.mail.yahoo.com>
Message-ID: <20040123152534.41615.qmail@web21508.mail.yahoo.com>

 
Are you sure that the file c:\temp\pytest.txt exists
in your laptop's hard disk?



--- Neil MacGaffey <neilmacgaffey at yahoo.com> escreveu:
> Hi  - I'm new to python and am stymied by something
> that should be simple.  The file open command below
> works fine on my desktop machine, but I cant get it
> to
> work on my laptop.  Since using Python on my laptop
> is
> realistically the only way I'm going to find the
> time
> to learn Python, this is a big problem for me. 
> Here's
> what I'm up against:
> 
>  PythonWin 2.3.3 (#51, Dec 18 2003, 20:22:39) [MSC
> v.1200 32 bit (Intel)] on win32.
> Portions Copyright 1994-2001 Mark Hammond
> (mhammond at skippinet.com.au) - see
> 'Help/About PythonWin' for further copyright
> information.
> >>> fobj = open(r'c:\temp\pytest.txt','r')
> Traceback (most recent call last):
>   File "<interactive input>", line 1, in ?
> IOError: [Errno 2] No such file or directory:
> 'c:\\temp\\pytest.txt'
> 
> The laptop is a Sony VIAO that's about 2 years old. 
> Its running Windows 2000, SP4.  The desktop is an
> older machine, but with the same Windows
> environment. 
> I've obtained a fresh download of Python 2.3.3 and
> the
> Win32 extension and have re-installed both a couple
> of
> times with no apparent problems.  I also tried
> dropping back to Python 2.3.2, but had same result. 
> Any ideas as to what I should be looking at on this
> laptop that might be causing the problem?
> 
> Thank you
> Neil
> 
> __________________________________
> Do you Yahoo!?
> Yahoo! SiteBuilder - Free web site building tool.
> Try it!
> http://webhosting.yahoo.com/ps/sb/
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list 

______________________________________________________________________

Yahoo! GeoCities: a maneira mais f?cil de criar seu web site gr?tis!
http://br.geocities.yahoo.com/



From glenfant at nospam-bigfoot.com  Thu Jan 29 10:06:55 2004
From: glenfant at nospam-bigfoot.com (Gilles Lenfant)
Date: Thu, 29 Jan 2004 16:06:55 +0100
Subject: regexp upward compatibility bug ?
Message-ID: <bvb7bb$2hr8$1@biggoron.nerim.net>

Hi,

Porting a Zope app from (old) Zope 2.3.3 powered by Python 1.5.2 to a 
newer Zope powered by Python 2.1.3, I found a regexp problem :

This does perfectly the job with Python 1.5.2 but raises an exception 
with Python 2.1.3. I can't see what's wrong when reading the "re" module 
doc.

Any hint welcome

   File "txt2html.py", line 27, in txt2html
     pat = re.compile(r'((ftp|http)://[\w-]+(?:\.[\w-]+)*(?:/[\w-\.?=]*)*)')
   File "/usr/local/lib/python2.1/sre.py", line 90, in compile
     return _compile(pattern, flags)
   File "/usr/local/lib/python2.1/sre.py", line 136, in _compile
     raise error, v # invalid expression
sre_constants.error: bad character range

Many thanks by advance

--
Gilles



From mwh at python.net  Wed Jan  7 07:52:09 2004
From: mwh at python.net (Michael Hudson)
Date: Wed, 7 Jan 2004 12:52:09 GMT
Subject: PEP 310 suggestions
References: <3ffbd106$0$15344$afc38c87@news.easynet.co.uk>
Message-ID: <m3fzer3oqu.fsf@pc150.maths.bris.ac.uk>

Ben <ben at transversal.com> writes:

> I hope its not too late to make these comments as I know the PEP has been
> around for a while!

No, no hurry at present.  Posting to comp.lang.python isn't
necessarily the best way of making comments if you want me to read
them, but, hey, it's worked this time...

> While I was reading the PEP a few ideas popped into my head and I wondered
> if something like them had already been considered. They are probably
> rubbish, but I thought I would throw them into the mix!
> 
> 1) If Python had code blocks, 

If Python had code blocks it would be a different language (as you say
below).  PEP 310 arose out of a vast (at least 1000 posts) discussion
on python-dev, and is deliberately conservative.  Perhaps I should
mention this in the PEP...

> something like this would be possible
> 
> def open_file(file, code_block):
>   try:
>         code_block()
>   finally:
>         file.close()
> 
> then,
> 
> f = file("foo")
> with open_file(f):     #Note only passing one argument
>   # do stuff with f
> 
> This would only work if the code_block could be executed in the scope in
> which it was written, and not in the one in which it was called. 
> 
> This seems to be more general than the current PEP, but introduces quite
> massive changes into the language. The idea is that:
> 
> with func(args):
>         suite
> 
> goes to
> 
> func(args, suite)

"That's my PEP, you go get your own!" (with apologies to Shrek).

I don't want to get into a huge discussion of this sort of feature,
but I don't want to stop you getting into one either.  But I think it
belongs in a different PEP (you seem to have a decent start here!).

> 2) Exit handler blocks. These are kind to backwards try-finally blocks that
> allow the "close" function to be written close to the "open" one. They also
> have the advantage that no extra special functions are needed.
> 
> e.g
> 
> l = lock.aquire()
> onexit l.release():
>   # do stuff while locked
> 
> is eqivalent to
> 
> l = lock.aquire()
> try:
>    # do stuff while locked
> finally:
>    l.release()
> 
> The obvious disadvantage is that it may be non-obvious that the release call
> is delayed to the end of the block

Hmm, that's an idea I hadn't had.  Limiting the "on exit" code to just
one expression and the disadvantage you mention mean I'm not sure I
like it that much, though...

> Any comments? The main reason I like these methods is that they are
> both more explicit than the PEP, and don't require the addition of
> any more special functions. However I can see the disadantages as
> well!

Well, thanks for your comments, but I'm not sure I want to incorporate
your ideas... I'll add the "onexit" idea as an alternative.

Cheers,
mwh

-- 
  Gullible editorial staff continues to post links to any and all
  articles that vaguely criticize Linux in any way.
         -- Reason #4 for quitting slashdot today, from
            http://www.cs.washington.edu/homes/klee/misc/slashdot.html


From martin at v.loewis.de  Fri Jan  2 17:01:22 2004
From: martin at v.loewis.de (Martin v. Loewis)
Date: Fri, 02 Jan 2004 23:01:22 +0100
Subject: version-independence between Python & BerkDB in Solaris
	packages?
In-Reply-To: <mailman.28.1073066560.12720.python-list@python.org>
References: <mailman.28.1073066560.12720.python-list@python.org>
Message-ID: <bt4pnh$rk2$00$1@news.t-online.com>

Skip Montanaro wrote:

> Is it possible to compile and package Python and the external libraries it
> uses to minimize coupling between package versions like this?  

There are several alternatives:

1. Link _bsddb.so statically with a libdb.a. Then you don't need
    any additional shared libraries on the target system. You may find
    that _bsddb.so can't open databases of the "system's" libdb-x.y.so,
    though.

2. Be prepared to have multiple versions of libdb installed on a system.
    BerkeleyDB is deliberately packaged in a way to make this possible:
    You can have /usr/local/BerkeleyDB-4.0, and, at on the same system,
    /usr/local/BerkeleyDB-4.2. Still the same problem as in 1) with
    opening newer databases.

3. Package _bsddb.so separately from Python. This is the typical
    Linux answer. Then provide multiple copies of _bsddb.so, each
    packaged for its own libdb-x.y. The different packages should
    conflict with each other. Can be combined with either 1 or 2.

> I note that
> other modules which link to specific external libraries don't have such
> problems:
> 
>     % ldd zlib.so
>             libz.so =>       /usr/lib/libz.so
>             libc.so.1 =>     /usr/lib/libc.so.1
>             libdl.so.1 =>    /usr/lib/libdl.so.1
>             /usr/platform/SUNW,Ultra-80/lib/libc_psr.so.1

That's because libz.so is part of the operating system. Even if
newer libz releases are available, nobody would install them
on Solaris (anymore), since it is so convenient to use the
system library. If Sun ever decides to bundle Sleepycat with
the system, the same thing may happen: Solaris 11 comes with
BerkeleyDB 4.7.178, and nobody installs 4.9.26 even though this
has been available for three months already. Instead, people
upgrade to Solaris 12 when it comes out.

Regards,
Martin



From a.schmolck at gmx.net  Fri Jan 23 08:10:50 2004
From: a.schmolck at gmx.net (A.Schmolck)
Date: 23 Jan 2004 13:10:50 +0000
Subject: I support PEP 326
References: <mailman.654.1074788734.12720.python-list@python.org>
	<401081A1.E4C34F00@alcyone.com>
	<roy-1E6566.21133122012004@reader2.panix.com>
	<hH2Qb.91181$6y6.1837343@bgtnsc05-news.ops.worldnet.att.net>
	<mailman.675.1074841738.12720.python-list@python.org>
	<4010E442.8D13AEF3@alcyone.com>
Message-ID: <yfshdym4xph.fsf@black132.ex.ac.uk>

Erik Max Francis <max at alcyone.com> writes:

> Since min(S) and min(*S) behave identically, I submit to you that they
> _should_ be.

They don't. (See bottom for example).

'as






















































>>> min([[1]])
[1]
>>> min(*[[1]])
1


From james at logicalprogression.net  Thu Jan 22 13:43:40 2004
From: james at logicalprogression.net (James Henderson)
Date: Thu, 22 Jan 2004 18:43:40 +0000
Subject: Need help with Python class idioms
In-Reply-To: <0DBEAls/KrhZ089yn@the-wire.com>
References: <f5c5dc88.0401211243.7e81a26b@posting.google.com>
	<mailman.613.1074720629.12720.python-list@python.org>
	<0DBEAls/KrhZ089yn@the-wire.com>
Message-ID: <200401221843.41030.james@logicalprogression.net>

On Thursday 22 January 2004 6:05 pm, Mel Wilson wrote:
> In article <mailman.613.1074720629.12720.python-list at python.org>,
>
> James Henderson <james at logicalprogression.net> wrote:
> >On Wednesday 21 January 2004 9:01 pm, Jonathan Daugherty wrote:
> >> # P.S. Since you're asking about idiom, it would be more Pythonic to
> >> write: #
> >> #     if self.mandatoryVar1 is None:
> >> #
> >> # using the identity test "is" rather than equality test "==", since
> >> there is # only one None.
> >>
> >> I'd write
> >>
> >>   if not self.mandatoryVar1:
> >>
> >> but the first method works, too.
> >
> >Are you sure an empty sequence or zero aren't valid values?  J.
>
>    It can get weird if you have to allow your caller to
> optionally specify the value None:
>
>
>     class _MissingParam:
>         "An object that no-one else will have a valid use for."
> ...
>     def a_func (opt1=_MissingParam):
>         if opt1 is _MissingParam:
>             opt1 = default_calculation ()       # for instance
> ...
>
>
>         Regards.        Mel.

In the original example (not by me) it was None that was being used as the 
marker that the value had not been set - that's all.

The topic was Python idiom and None is the most often used marker that a value 
has not been passed explicitly and the default value should be used.  (Of 
course, if the default value is immutable it can be used directly.)  See:

http://www.python.org/doc/current/ref/function.html

You're talking about the case where None may be passed explicitly and should 
not trigger the default.  An even terser solution to this than yours is to 
use an empty list, though any mutable type will do.  You see this all over 
the Zope code:

_marker = []

J.
-- 
James Henderson, Logical Progression Ltd.
http://www.logicalprogression.net/
http://sourceforge.net/projects/mailmanager/




From max at cNvOiSsiPoAnMtech.com  Fri Jan 16 09:36:38 2004
From: max at cNvOiSsiPoAnMtech.com (Maxim Khesin)
Date: Fri, 16 Jan 2004 14:36:38 GMT
Subject: SimpleXMLRPCServer
In-Reply-To: <mailman.424.1074245321.12720.python-list@python.org>
References: <mailman.424.1074245321.12720.python-list@python.org>
Message-ID: <WFSNb.80288$cM1.14104179@twister.nyc.rr.com>

whitekid wrote:

> SimpleXMLRPCServer.py is Just Simple!
> 
> A few days age. I considered XMLRPC framework for our service.
> But finally I choose WebWare. 
> 
> Read paper below: http://webware.sourceforge.net/Papers/IntroToWebware.html

Ok, but I am interested in the XML-RPC protocotl, so how is webware 
supposed to help me?


From theller at python.net  Tue Jan 27 03:16:05 2004
From: theller at python.net (Thomas Heller)
Date: Tue, 27 Jan 2004 09:16:05 +0100
Subject: Py2exe and WMI module
References: <mailman.804.1075136487.12720.python-list@python.org>
Message-ID: <u12hvmbe.fsf@python.net>

Tim Golden <tim.golden at viacom-outdoor.co.uk> writes:

>>From: nekiv at start.no [mailto:nekiv at start.no]
>>
>>I'm having a problem when I try to make a standalone installation of a
>>Python program using Tim Goldens WMI-module.  The py2exe produce the
>>exe-file as expected, but it fails to execute.
>
> Well, I've tried to play with wmi-py2exe myself for the first
> time, with mixed results. If I understand the idea, what you
> do is this:
>
> Use the makepy generator to generate gen_py support for the
> Microsoft WMI 1.1 Scripting Library. This will result in a
> proxy module in %TEMP%\gen_py\2.3 (for recent win32all releases)
> called something like:
>
> 565783C6-CB41-11D1-8B02-00600806D9B6x0x1x1.py
>
> Note the x0x1x1 at the end.
>
> You then need a setup script such as this one:
>
> <setup.py>
> from distutils.core import setup
> import py2exe
>       
> setup (
>   console=["wmi_test.py"],
>   options = {
>     "py2exe": {
>       "typelibs": [('{565783C6-CB41-11D1-8B02-00600806D9B6}', 0, 1, 1)]
>     }
>   }
> )
> </setup.py>
>
> That "typelibs" line is made up from the proxy string 
> effectively split like this:
>
> "565783C6-CB41-11D1-8B02-00600806D9B6x0x1x1".split ("x")
>
> It's not exactly that, but you can work it out for yourself. In
> fact, the first bit is the CLSID, and the others are the LCID,
> major and minor numbers from within
> 565783C6-CB41-11D1-8B02-00600806D9B6x0x1x1.py
>
> <... snipped from Python proxy module ...>
>
> CLSID = IID('{565783C6-CB41-11D1-8B02-00600806D9B6}')
> MajorVersion = 1
> MinorVersion = 1
> LibraryFlags = 8
> LCID = 0x0
>
> </snip>

I think the 'official' way is to run makepy with the '-i' flag, then it
prints out this:

c:\>\python23\lib\site-packages\win32com\client\makepy.py -i
Microsoft WMI Scripting V1.2 Library
 {565783C6-CB41-11D1-8B02-00600806D9B6}, lcid=0, major=1, minor=2
 >>> # Use these commands in Python code to auto generate .py support
 >>> from win32com.client import gencache
 >>> gencache.EnsureModule('{565783C6-CB41-11D1-8B02-00600806D9B6}', 0, 1, 2)

Thomas


From mwh at python.net  Mon Jan 12 07:11:38 2004
From: mwh at python.net (Michael Hudson)
Date: Mon, 12 Jan 2004 12:11:38 GMT
Subject: script to translate from compiler AST
References: <m3d69qk10i.fsf@netmaster.kds.com.ua>
Message-ID: <m3u131z7ra.fsf@pc150.maths.bris.ac.uk>

Andrey Khavryuchenko <akhavr at kds.com.ua> writes:

> Hi!
> 
> I'm looking for a script to translate from 'compiler' AST to py source

google('decompyle')

> and executable code.

Um, not sure what you're asking for here.  You might be asking for
Python2C, but it's probably not what you want...

Cheers,
mwh

-- 
  Enlightenment is probably antithetical to impatience.
                                        -- Erik Naggum, comp.lang.lisp


From sross at connectmail.carleton.ca  Tue Jan  6 10:59:36 2004
From: sross at connectmail.carleton.ca (Sean Ross)
Date: Tue, 6 Jan 2004 10:59:36 -0500
Subject: help needed with class and method confusion
References: <20040106102232.19889.00002028@mb-m01.aol.com>
Message-ID: <VVAKb.1463$BA6.301271@news20.bellglobal.com>

"Cndistin" <cndistin at aol.com> wrote in message
news:20040106102232.19889.00002028 at mb-m01.aol.com...
> The problem part of my code is
> class Application:
>     class Moon:
>         def __init__(self, name):
>             self.name = name
>     def __init__(self):
>         self.moons = []
>         names = ["Io", "Europa", "Ganymeade"]
>         for name in names:
>             setattr(self, name, Moon(name))
> I would like to somehow get self.moons to equal
> [self.Io, self.Europa, self.Ganymeade]. I had hoped on using
> self.moons as an iterant in "for" loops to be able to alter each
> in turn.
>
> Thanks in advance for any possible help.

class Application:
    class Moon:
        def __init__(self, name):
            self.name = name
        def __repr__(self):
            "added this to pretty up the printing of a.moons"
            return "Moon(%s)"%self.name

    def __init__(self):
        self.moons = []
        names = ["Io", "Europa", "Ganymeade"]
        for name in names:
            # took Moon(name) out of the setattr()  because we'll be
            # using it again in moons.append. Also used self.Moon
            # because Moon alone raises a NameError
            moon = self.Moon(name)
            setattr(self, name, moon)
            self.moons.append(moon)

a = Application()
print a.moons

# output
[Moon(Io), Moon(Europa), Moon(Ganymeade)]

HTH
Sean




From jepler at unpythonic.net  Sat Jan 24 16:33:55 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Sat, 24 Jan 2004 15:33:55 -0600
Subject: time.time()
In-Reply-To: <buunre$ffe$1@solaris.cc.vt.edu>
References: <buubug$rcj$1@solaris.cc.vt.edu>
	<7cf510d1k3ug79am8s709ebhar2sspjlm2@4ax.com>
	<buunre$ffe$1@solaris.cc.vt.edu>
Message-ID: <20040124213355.GG32445@unpythonic.net>

bart,

a-b/c evaluates as a-(b/c)

Jeff



From bignose-hates-spam at and-benfinney-does-too.id.au  Mon Jan 26 20:49:25 2004
From: bignose-hates-spam at and-benfinney-does-too.id.au (Ben Finney)
Date: 27 Jan 2004 12:39:25 +1050
Subject: efficient updating of nested dictionaries
References: <H%_Qb.2609$925.1917@nwrddc02.gnilink.net>
	<mailman.786.1075088534.12720.python-list@python.org>
	<bv2e21$j5e$2@news.service.uci.edu>
	<mailman.825.1075166200.12720.python-list@python.org>
Message-ID: <slrnc1bi2k.lot.bignose-hates-spam@iris.polar.local>

On Mon, 26 Jan 2004 20:11:39 -0500, Rich Krauter wrote:
> What a nice way to simplify this common task. That's great. Thanks for
> the advice. 
>
> [HTML garbage repeating the same content]

What a hideous way to complicate this simple medium.  That sucks.
Thanks for turning it off in future.

-- 
 \      "My roommate got a pet elephant. Then it got lost. It's in the |
  `\                           apartment somewhere."  -- Steven Wright |
_o__)                                                                  |
Ben Finney <http://bignose.squidly.org/>


From nuffsaid at phreaker.net  Sun Jan 18 15:16:27 2004
From: nuffsaid at phreaker.net (Nuff Said)
Date: Sun, 18 Jan 2004 21:16:27 +0100
Subject: Printing variable names
References: <a6d1df44.0401181122.56f1f091@posting.google.com>
Message-ID: <pan.2004.01.18.20.16.27.215606@phreaker.net>

On Sun, 18 Jan 2004 11:22:08 -0800, Mike wrote:

> mylist = [a, b, c]
> 
> I want to print out the names of the variables in mylist (not the
> values of a, b, and c).  How do I go about doing this.  Thanks.

The following example shows that this does not really make sense:

    a = 1; b = 2; c = 3;
    mylist = [a, b, c]
    a = 4; b = 5; c = 6;
    print mylist
    print a, b, c

Result:  
    [1, 2, 3]
    4 5 6

and *not*: 
    [4, 5, 6]
    4 5 6

You might want to google for 'Python object reference' etc.
Moreover, having a look (e.g. in the tutorial) at how Python
passes arguments to functions (mutable and immutable objects)
might help to get a better understanding of what is going on
behind the scenes.

HTH / Nuff 



From candiazoo at comcast.net  Sun Jan 25 01:44:26 2004
From: candiazoo at comcast.net (Michael S. Jessop)
Date: Sun, 25 Jan 2004 06:44:26 GMT
Subject: Seem to be having trouble with Python/Bethon.
References: <PM0003D18B88B36E37@x1-6-00-a0-c9-e7-c3-de.ne1.client2.attbi.com>
	<6a2dnXCsJ60-9Yzd4p2dnA@giganews.com> <1074926701.236022@yasure>
Message-ID: <PM0003D1B3D06FA06C@x1-6-00-a0-c9-e7-c3-de.ne1.client2.attbi.com>

Rebuilt with Net_Server.  Works fine now.

Mike

Donn Cave wrote:
> Quoth Zoo Keeper <candiazoo at comcast.net>:
> | No takers, eh?  :/
> |
> | I can't be the only python user on BeOS...
> |
> | The only thing I can think of is that I am running "bone".
>
> Well, at least now we know one thing about your setup.
>
> In later versions, a Python class can definitely inherit
> from BWindow.  If you have the 0.5.1 distribution, the
> programs in "test" do it that way, and they work.  Earlier
> versions, before 0.5.0, can't do this (and neither can
> older versions of Python.)  It is certainly possible to
> mess up the BeOS libraries while trying to improve them,
> though, as demonstrated by the 3rd party "Developer Edition".
> That certainly could be your problem.
>
> You're not the only Python user on BeOS, but they are few.
> Given the level of general interest, I think you'd have
> better odds posting to comp.sys.be.programmer.
>
> As for what I read as your implicit question, will you be
> sorry you chose to develop your application in Python with
> a Bethon UI - it depends on the details.  The functions
> available here are numerous but not nearly the whole Be API,
> and there are whole areas of functionality that it will
> probably never get into.  It's pretty useful for casual
> stuff, but probably not for real hard core polished
> applications.  Distribution will be a harder, too, than
> a straight C++ program.
>
> 	Donn Cave, donn at drizzle.com


From latex-bugs at latex-project.org  Thu Jan 29 21:41:15 2004
From: latex-bugs at latex-project.org (latex-bugs at latex-project.org)
Date: Fri, 30 Jan 2004 03:41:15 +0100 (CET)
Subject: hi
In-Reply-To: <200401300241.i0U2f6IA014897@rzdspc1.informatik.uni-hamburg.de>
References: <200401300241.i0U2f6IA014897@rzdspc1.informatik.uni-hamburg.de>
Message-ID: <200401300241.i0U2fFwb016361@sun.dante.de>

Thank you for your message to latex-bugs at latex-project.org.

Sorry, but to prevent SPAM, the latex-bugs email processor
will accept only messages produced with the help of
latexbug.tex. Please resend your problem report with
the contents of latexbug.msg as the body of your message.

-- 



From jcarlson at uci.edu  Tue Jan 20 18:04:31 2004
From: jcarlson at uci.edu (Josiah Carlson)
Date: Tue, 20 Jan 2004 15:04:31 -0800
Subject: Installing SpamBayes
References: <400c399b_2@newsfeed.slurp.net>
	<up5r00hr648soiun3j6q326ga9n808hf17@4ax.com>
	<400c451a_1@newsfeed.slurp.net>
	<20040120135921.1C3F.JCARLSON@uci.edu>
	<400c5790_1@newsfeed.slurp.net>
Message-ID: <20040120150005.1C48.JCARLSON@uci.edu>

> That didnt work either and the file assoc. are correct.
> 
> > If you are in windows and your associations are correct, try:
> > setup.py install

Steps for you to help us help you:
1. Open up a console.
2. Change to the proper path.
3. Run (without the single quotes)
  'python setup.py install'
 if that doesn't work, try
  'setup.py install'
4. Copy and paste the output in a message here.

 - Josiah



From pythonguy at Hotpop.com  Fri Jan 23 07:56:41 2004
From: pythonguy at Hotpop.com (Anand Pillai)
Date: 23 Jan 2004 04:56:41 -0800
Subject: Python Consultants?
References: <8e198b65.0401221315.6d5cb3fe@posting.google.com>
Message-ID: <84fc4588.0401230456.3085796f@posting.google.com>

I do some python consultancy in India. Your problem looks
interesting, so I will take a look at it after the week-end
break.

If you dont mind off-shore consultancy, you can contact
me at pythonguy at hotpop.com .

Regards

-Anand

arsanalytica at yahoo.com (Dan) wrote in message news:<8e198b65.0401221315.6d5cb3fe at posting.google.com>...
> I am working on a python/zope web application and could really use
> some *expert* help on a short term basis.
> 
> Is there an appropriate forum for trolling for Python Consultants?
> 
> Here are a pair XML problems that are available:
> 
> #1) Setup to convert these xml files 
> http://www.gothamanalytics.com/PairTools/geturl?url=http://app.quotemedia.com/data/getHistory.xml&symbol=SUNW
> http://www.gothamanalytics.com/PairTools/geturl/?url=http://app.quotemedia.com/data/getQuotes.xml?symbols=SUNW
> into a vector of open,close,volume information suitable for use with a
> numerical Python module.  Doing this quickly is a plus.
> Here are the dtds of interest:
> http://app.quotemedia.com/data/dtds/history.dtd
> http://app.quotemedia.com/data/dtds/quotes.dtd
>  
> #2) Expose the Salesforce.com SOAP functionality from salesforce.com
> generated WSDL files, here is an example WSDL
> http://gothamanalytics.com/Ex/enterprise.wsdl
> See sforce.com for more info on the salesforce.com API.  A Python
> solution is preferred but a work around which uses Java and the
> Salesform.com Apache Axis library and an appropriate gateway from
> python might also be acceptable.  Results from an attempt at using ZSI
> to process the WSDL file is appended to this message.


From netquest at sympatico.ca  Tue Jan 27 22:31:27 2004
From: netquest at sympatico.ca (KNS)
Date: Tue, 27 Jan 2004 19:31:27 -0800
Subject: winapi: mouseclick
In-Reply-To: <mailman.855.1075213039.12720.python-list@python.org>
References: <mailman.855.1075213039.12720.python-list@python.org>
Message-ID: <JlDRb.20248$mf4.855974@news20.bellglobal.com>



This snippet launches the application...It's not strictly
meant for IE.

w=DispatchEx("InternetExplorer.Application")
w.Navigate(startpage)

w.Left=225
w.Top=25
w.Width=900
w.Height=960
w.Resizable=0
w.Visible=1
handle=w.HWND

lasturl = w.LocationURL
cururl = w.LocationURL

while w.Visible:
	if cururl != lasturl:
		#bunch of stuff here to check ReadyState
	#would also like to see if mouse click/keypress here...


This is an attempt to explore simple possibilities first.  If such
a solution doesn't exist, then 'yes' the use of pyHook will have to
be considered or even mandated.  Not knowing before hand can't be avoided.



Tim Golden wrote:

> 
> 
> Could you *please* post some code, or at least pseudo-code, to
> show us what you're doing. What is sounds like to me, is that
> you're doing this, say:
> 
> import win32api
> win32api.ShellExecute (0, "open", "iexplore.exe", None, None, 1)
> 
> and then you want to know what the user's doing within that
> application so that you can, eg, keep track of URLs accessed etc.
> 
> Am I close? 
> 
> If I am, this isn't easy. If it is, strictly, Internet Explorer that
> you're trying to use, then it does have an Events mechanism (about
> which I know nothing) which I believe can be accessed from Python.
> 
> If it is any application in general which you're trying to keep track
> of, that's more difficult. Windows (and by that I mean any modern GUI
> system) apps don't work like your old-fashioned batch / terminal 
> apps. You don't "wait" for a user to press something; rather, you set
> up an event loop and handle or ignore any event which comes in. Each
> application does this on its own behalf. To do the same on behalf of
> another application requires either subclassing (messy) or system
> key / mouse hooks (cf
> http://cvs.sourceforge.net/viewcvs.py/uncpythontools/pyHook/)
> or some other arcane mechanism.
> 
> TJG
> 
> 
> ________________________________________________________________________
> This e-mail has been scanned for all viruses by Star Internet. The
> service is powered by MessageLabs. For more information on a proactive
> anti-virus service working around the clock, around the globe, visit:
> http://www.star.net.uk
> ________________________________________________________________________
> 



From mwh at python.net  Mon Jan  5 11:39:24 2004
From: mwh at python.net (Michael Hudson)
Date: Mon, 5 Jan 2004 16:39:24 GMT
Subject: KeyboardInterrupt and threading
References: <a6562e06.0401021352.65aac82b@posting.google.com>
Message-ID: <m3fzeu73k3.fsf@pc150.maths.bris.ac.uk>

q2n8byu02 at sneakemail.com (Ivan Nestlerode) writes:

> Hello comp.lang.python,
> 
> I am attempting to write a threaded program right now in Python
> (version 2.3 on Debian unstable) and the current behavior of
> KeyboardInterrupt is causing me grief. From the documentation of the
> thread module in Python 2.3.3:
> 
> "Threads interact strangely with interrupts: the KeyboardInterrupt
> exception will be received by an arbitrary thread. (When the signal
> module is available, interrupts always go to the main thread.)"

On debian, the signal module certainly should be available, and the
KeyboardInterrupt exception should go to the main thread.  Or at
least, that's what I thought.  You're definitely seeing it being
delivered to an arbitrary thread?

Cheers,
mwh

-- 
  The Programmer's Quick Guide To Python (Time Machine version):
    You try to shoot yourself in the foot, only to realize that
    there's no need, since Guido thoughtfully shot you in the foot 
    years ago.                     -- Nick Mathewson, comp.lang.python


From donn at drizzle.com  Sun Jan 25 13:04:51 2004
From: donn at drizzle.com (Donn Cave)
Date: Sun, 25 Jan 2004 18:04:51 -0000
Subject: Seem to be having trouble with Python/Bethon.
References: <PM0003D18B88B36E37@x1-6-00-a0-c9-e7-c3-de.ne1.client2.attbi.com>
	<6a2dnXCsJ60-9Yzd4p2dnA@giganews.com> <1074926701.236022@yasure>
	<PM0003D1B3D06FA06C@x1-6-00-a0-c9-e7-c3-de.ne1.client2.attbi.com>
Message-ID: <1075053883.217392@yasure>

Quoth Michael S. Jessop <candiazoo at comcast.net>:
| Rebuilt with Net_Server.  Works fine now.

Thanks, that's interesting.  I would not have guessed that the
host network implementation could be a factor in the Python
type/class internals that seemed to be failing for you, so I'm
guessing that when you choose between the two, there are some
other things that come along that have nothing to do with the
network.  I'm actually running a BONE system right now, as I
type this, and the Python inheritance works fine - Zeta RC1.
Python+Bethon comes on the CD, but looks like it's the standard
issue software built on 5.03 (and has a problem with the Zeta
internationalization software, crashes on exit after I suppose
it freed something it wasn't supposed to.)

	Donn Cave, donn at drizzle.com


From nick889 at mail.com  Sat Jan  3 13:28:02 2004
From: nick889 at mail.com (Nick)
Date: 3 Jan 2004 10:28:02 -0800
Subject: Py2exe?? Error: Nothing to do?
Message-ID: <86df8ed4.0401031028.6edf2381@posting.google.com>

I am trying to turn one of my .py files into an exe and I created a
setup script and everything, but when i do the follwing "python
myscript.py py2exe" I get an error saying "Error: Nothing to do"  I am
using Python 2.3 (not alpha) with the latest binary of py2exe on
windows 98.

What did i do wrong and how do i fix it, thanks.


From deets_noospaam at web.de  Wed Jan 14 11:45:08 2004
From: deets_noospaam at web.de (Diez B. Roggisch)
Date: Wed, 14 Jan 2004 17:45:08 +0100
Subject: passing callback function to c-extension
References: <bu3h15$dlk$00$1@news.t-online.com>
	<bu3n65$1pk$1@news-reader5.wanadoo.fr>
Message-ID: <bu3rmk$t1h$01$1@news.t-online.com>

Hi,

> A Python function is just a regular Python object, so it is represented at
> C level by a PyObject*. To call it from C, just use one of the
> PyObject_Call functions - see
> http://www.python.org/doc/current/api/object.html#l2h-189

Thanks - works like a charm. I'm now looking for a way to ensure that the
passed object is actually a callable one - and how to throw exceptions. But
I just started looking for that, so I'll be back if I really need help.

Diez


From rainerd at eldwood.com  Tue Jan 13 17:32:52 2004
From: rainerd at eldwood.com (Rainer Deyke)
Date: Tue, 13 Jan 2004 22:32:52 GMT
Subject: Why learn Python ??
References: <40029dad$0$28706$a729d347@news.telepac.pt><btubno$bd8k6$1@ID-46268.news.uni-berlin.de><100655fo84c2211@corp.supernews.com><btv7gf$btv1p$1@ID-46268.news.uni-berlin.de><87d69og2jl.fsf@pobox.com><bu0v9v$c6nr4$1@ID-46268.news.uni-berlin.de><873cajafr8.fsf@pobox.com><bu1gt7$cn6mk$1@ID-46268.news.uni-berlin.de>
	<mailman.335.1074030406.12720.python-list@python.org>
Message-ID: <nm_Mb.42963$Rc4.167562@attbi_s54>

Jp Calderone wrote:
> On Tue, Jan 13, 2004 at 02:28:38PM -0500, Derek wrote:
>> "John J. Lee" wrote:
>> Python and C++ can also be a bigger mess than sum of either part.
>> Take your pick.
>>
>
>   Look at how many modules in the stdlib are not implemented in
> Python. Look at all the builtin types.  It *can* and *does* work, and
> with very little mess, if you know what you're doing.

They're also not implemented in C++.  They're implemented in C, a very
different language.  And they *are* a mess compared to C code that doesn't
have to interface with Python.


-- 
Rainer Deyke - rainerd at eldwood.com - http://eldwood.com




From kirk at strauser.com  Tue Jan 27 10:15:10 2004
From: kirk at strauser.com (Kirk Strauser)
Date: Tue, 27 Jan 2004 15:15:10 GMT
Subject: TELNET instead PING
References: <5f505344.0401260332.184d4225@posting.google.com>
	<401571B9.F9DF99D0@engcorp.com> <bv5h0p$c1v$1@inews.gazeta.pl>
Message-ID: <87y8rt2zow.fsf@strauser.com>

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

At 2004-01-27T11:11:22Z, "DCK" <dck at gazeta.pl> writes:

> I was on some kind of Network course, where teacher said, that telnet is
> better then PING.

Your teacher was on crack.  That's like saying that "table lamps are better
than pencil cups".  :-)
- -- 
Kirk Strauser
The Strauser Group
Open. Solutions. Simple.
http://www.strausergroup.com/
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.4 (GNU/Linux)

iD8DBQFAFn/T5sRg+Y0CpvERAq0UAJ9WhPxMY1Um93QwcOLqGHy+0KlcQgCeJbdW
4o7kvcO5ryEZ8HrSwDy7o9c=
=kPeN
-----END PGP SIGNATURE-----


From bart_nessux at hotmail.com  Fri Jan 23 16:58:38 2004
From: bart_nessux at hotmail.com (Bart Nessux)
Date: Fri, 23 Jan 2004 16:58:38 -0500
Subject: when x process isn't running... do something
In-Reply-To: <burvt4$sq$2@news.service.uci.edu>
References: <burtha$5ck$1@solaris.cc.vt.edu> <burtrt$5gm$1@solaris.cc.vt.edu>
	<burvt4$sq$2@news.service.uci.edu>
Message-ID: <bus5ee$hjt$1@solaris.cc.vt.edu>

Josiah Carlson wrote:
> Bart Nessux wrote:
> 
>> Bart Nessux wrote:
>>
>>> Howdy,
>>>
>>> I'm trying to time how long it takes dd to run on a G5, versus how 
>>> long it takes to run on a G4 (PATA vs. SATA). Both sytems have Mac OS 
>>> X 10.3.2 and Python 2.3. Could someone demonstrate how I might use 
>>> Python to monitor for the presense of a process and to do something 
>>> (in this case send an email which I know how to do) as soon as that 
>>> process is no longer present? Any suggestions on how to monitor? Call 
>>> top every 5 secs and read it's output searching for 'dd'???
>>>
>>> TIA,
>>> Bart
>>>
>>
>> I forgot to mention the fact that I already know when the process 
>> began. All I need to know is when it ends and then I can calculate the 
>> part in between those two points.
>>
> 
> Why not just:
> 
> import time
> import os
> start = time.time()
> s = os.system('dd <args>')
> print time.time()-start
> 
> 
>  - Josiah

That works great... i didn't think of using time (the module)... had to 
rewrite my function to contain sub-functions so that I could time each 
piece of it seperately. Thanks for the tip!!!

Bart



From mwh at python.net  Tue Jan 20 06:32:29 2004
From: mwh at python.net (Michael Hudson)
Date: Tue, 20 Jan 2004 11:32:29 GMT
Subject: secure unpickle?
References: <bufkot$96vl$1@netnews.upenn.edu> <8765f8xe8p.fsf@pobox.com>
	<7xsmiby92z.fsf@ruckus.brouhaha.com>
Message-ID: <m3r7xu6ek2.fsf@pc150.maths.bris.ac.uk>

Paul Rubin <http://phr.cx at NOSPAM.invalid> writes:

> jjl at pobox.com (John J. Lee) writes:
> > marshal
> > 
> > The docs have similar warnings, though.
> 
> Marshal has an additional problem, which is that the format can change
> incompatibly between one Python version and another.  

Oh, and this:

>>> marshal.loads('x')
Segmentation fault

There's a patch from Armin that I'm supposed to be reviewing about
that...

I really wouldn't unmarshal input that could come from some random
source on the internet.

Cheers,
mwh

-- 
  If design space weren't so vast, and the good solutions so small a
  portion of it, programming would be a lot easier.
                                            -- maney, comp.lang.python


From bignose-hates-spam at and-benfinney-does-too.id.au  Wed Jan 14 20:23:50 2004
From: bignose-hates-spam at and-benfinney-does-too.id.au (Ben Finney)
Date: 15 Jan 2004 12:13:50 +1050
Subject: confusion about Exception Mechanism
References: <bu4qhr$dbqj3$1@ID-221199.news.uni-berlin.de>
Message-ID: <slrnc0bs2m.121.bignose-hates-spam@rose.localdomain.fake>

On Wed, 14 Jan 2004 17:31:41 -0800, Zachary wrote:
> I'm relatively new at Python

Welcome!  Please work your way through the tutorial, to get a good
grounding in the language.

    <http://www.python.org/doc/current/tut/>

> slightly confused about how the try...except mechanism is supposed to
> work.

Chapter 8 of the tutorial deals with errors and exceptions.

> I am just not sure how it would
> be used, as it just seems that it is another sort of loop.

Goodness, that *is* confused :-)

> Is their any sort of example I could look at, that has an example of
> how it is applied?

Work your way through the tutorial, start to finish, and see if it
doesn't also answer a whole lot of other questions -- including ones you
haven't thought of yet.

-- 
 \         "Faith may be defined briefly as an illogical belief in the |
  `\               occurrence of the improbable."  -- Henry L. Mencken |
_o__)                                                                  |
Ben Finney <http://bignose.squidly.org/>


From ods at strana.ru  Thu Jan 22 08:47:00 2004
From: ods at strana.ru (Denis S. Otkidach)
Date: Thu, 22 Jan 2004 16:47:00 +0300 (MSK)
Subject: utf8 encoding problem
In-Reply-To: <20040122103549.GA5620@wiggy.net>
Message-ID: <Pine.LNX.4.44L.0401221640010.31484-100000@ods.pravda.rfn.ru>

On Thu, 22 Jan 2004, Wichert Akkerman wrote:

WA> I'm struggling with what should be a trivial problem but I
WA> can't seem to
WA> come up with a proper solution: I am working on a CGI that
WA> takes utf-8
WA> input from a browser. The input is nicely encoded so you get
WA> something
WA> like this:
WA>
WA>   firstname=t%C3%A9s
WA>
WA> where %C3CA9 is a single character in utf-8 encoding.
WA> Passing this
WA> through urllib.unquote does not help:
WA>
WA>   >>> urllib.unquote(u't%C3%A9st')
WA>   u't%C3%A9st'

You have to pass 8-bit string, but not unicode.  The following
code works as expected:

>>> urllib.unquote('t%C3%A9st').decode('utf-8')
u't\xe9st'

P.S. According to HTML standard, with
application/x-www-form-urlencoded content type form data are
resricted to ASCII codes:
http://www.w3.org/TR/html4/interact/forms.html#form-data-set
http://www.w3.org/TR/html4/interact/forms.html#submit-format

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




From stephan.diehlNOSPAM at gmx.net  Fri Jan 16 10:24:30 2004
From: stephan.diehlNOSPAM at gmx.net (Stephan Diehl)
Date: Fri, 16 Jan 2004 16:24:30 +0100
Subject: SimpleXMLRPCServer
References: <mailman.424.1074245321.12720.python-list@python.org>
	<WFSNb.80288$cM1.14104179@twister.nyc.rr.com>
Message-ID: <bu8vjh$ao5$07$1@news.t-online.com>

Maxim Khesin wrote:

> whitekid wrote:
> 
>> SimpleXMLRPCServer.py is Just Simple!
>> 
>> A few days age. I considered XMLRPC framework for our service.
>> But finally I choose WebWare.
>> 
>> Read paper below:
>> http://webware.sourceforge.net/Papers/IntroToWebware.html
> 
> Ok, but I am interested in the XML-RPC protocotl, so how is webware
> supposed to help me?

Actually, Webware contains a WebKit.XMLRPCServlet class that lets you define
your xml services. 


From sidharthk at hotmail.com  Wed Jan 28 10:42:13 2004
From: sidharthk at hotmail.com (Sidharth Kuruvila)
Date: Wed, 28 Jan 2004 21:12:13 +0530
Subject: isinstance() bug
References: <mailman.907.1075296157.12720.python-list@python.org>
Message-ID: <bv8lha$pbi5a$1@ID-223265.news.uni-berlin.de>


"Michal Vitecek" <fuf at mageo.cz> wrote in message
news:mailman.907.1075296157.12720.python-list at python.org...
> hello,
>
>  please consider the following situation:
>
>  under the current directory there's a subdirectory 'package' with two
>  files: __init__.py and module.py
>
>     ./package:
>         __init__.py
>         module.py
>
>  module.py contains:
>
>  class A(object):
>     pass
>
>  aModule = A()
>
>
>  now, let's do:
>
>  current directory:
>
>     >>> import package.module
>     >>> type(package.module.aModule)
>     <class 'package.module.A'>
>     >>> isinstance(package.module.aModule, package.module.A) # so far good
>     1
>     >>> a = package.module.A()
>     >>> isinstance(a, package.module.A) # so far good
>     >>> import sys
>     >>> sys.path.append('package')
>     >>> import module
>     >>> a = module.A()
>     >>> isinstance(a, package.module.A) # will return 0 !!!
>     0
>     >>> isinstance(package.module.aModule, module.A) # will return 0 !!!
>     0
>     >>>
>
>  how is it possible that it IS important how you imported a class
>  definition for isinstance() to work? it's insane!
>
> --
> fuf (fuf at mageo.cz)
>

its got to do with how python imports modules.
both imports are treated as seperate modules because the relative paths are
diferent.
python is a dynamic language it figures out where modules are located at run
time, it would be expensive to check all paths to see if they ended up at
the same file.




From seefeld at sympatico.ca  Sun Jan 18 15:03:48 2004
From: seefeld at sympatico.ca (Stefan Seefeld)
Date: Sun, 18 Jan 2004 15:03:48 -0500
Subject: circular dependency between class and its metaclass
Message-ID: <400AE6A4.4090409@sympatico.ca>

hi there,

I'v run into a little problem for which I only found an ugly workaround,
so I'd like to know whether people are aware of better ways to achieve this...

I'm defining a class 'Class' for which I want to set up a __metaclass__ 'Type'
which does some work on class variables. In particular, it should apply
a function on all base classes that are themself derived from 'Class'.

My first try was:

====

class Class(object):

     class Type(type):

         def __init__(cls, name, bases, dict):

             hierarchy = list(filter(lambda i:issubclass(i, Class), bases))
             # do something with the hierarchy here

     __metaclass__ = Type

====

However, this fails because at the point where I want to create the
'hierarchy' variable 'Class' isn't known yet. (At what point is it actually
injected into the local dict ?)

Then I tried to define 'Type' after 'Class' (instead of inside it):

====

class Class(object): pass #supress details for clarity

class Type(type):
     ...

Class.__metaclass__ = Type

====

But this didn't work at all (even though I don't quite understand why).

Then I tried a workaround using an auxiliary base class:

====

class Base(object): pass #supress details for clarity

class Type(type):
     def __init__(cls, name, bases, dict):

         # now base the filter on 'Base'
         hierarchy = list(filter(lambda i:issubclass(i, Base), bases))
         # do something with the hierarchy here

class Class(Base):

     __metaclass__ = Type

     ...

====

though this is quite ugly, as 'Class' is the class that provides the stuff
the 'Type' constructor should act on, not 'Base' (so to make the filter above
work I have to do some more ugly tricks).

I'd very much appreciate if anybody could shed some light on why python
behaves the way it does in the two first cases, and whether there are
better ways to achieve what I want. Thanks a lot !

Stefan




From Kyler at news.Lairds.org  Tue Jan 20 19:12:17 2004
From: Kyler at news.Lairds.org (Kyler Laird)
Date: Wed, 21 Jan 2004 00:12:17 GMT
Subject: calling Pyrex results from C
References: <f7tvd1-a1o.ln1@jowls.lairds.org>
Message-ID: <jjq0e1-gup.ln1@jowls.lairds.org>

Paul Prescod graciously responded to my plea for help by gently asking
if I had initialized Python.  Doh!  I had gotten lazy and assumed that
Pyrex would take care of such details.  (How could it?!)

Initializing the interpreter seems to have the simple test case I made
working smoothly.  Now it's on to bigger and better things...

Pyrex is *so* cool.

Thank you, Paul!

--kyler


From peter at engcorp.com  Thu Jan 15 11:32:28 2004
From: peter at engcorp.com (Peter Hansen)
Date: Thu, 15 Jan 2004 11:32:28 -0500
Subject: Lua versus C++ for embedded processor
References: <mailman.369.1074114471.12720.python-list@python.org>
Message-ID: <4006C09C.66B714BC@engcorp.com>

(Sorry for off-topic posts...)

John Benson wrote:
> 
> Maybe Lua has a place in your embedded application, if there isn't
> enough infrastructure for Python.

That's something I should seriously investigate.  I did consider FORTH
but encountered the usual emotional block which always shows up: the
language is just too "weird" for most people, and I can't saddle the 
company with a maintenance issue like that.  It just doesn't seem 
feasible to expect all the developers to have to learn FORTH just to
write for our embedded products.

Lua, on the other hand, as I understand it, is much more traditional in
flavour and (therefore?) easier to read, so it feels more likely to 
find a place.  Thanks for the suggestion.

> As for C++ on microcontrollers, I have absolutely no idea what the pros and
> cons are. Any ideas out there on whether C++ is a good fit there?

I believe the same pros and cons apply there as they do anywhere.  Easier
to handle complexity (e.g. encapsulating hardware with clean driver objects)
etc, but possible impact on performance.

-Peter


From jcarlson at nospam.uci.edu  Sat Jan 24 00:31:15 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Fri, 23 Jan 2004 21:31:15 -0800
Subject: Batch commands on Windows
In-Reply-To: <grmQb.15157$yd7.13778@newssvr27.news.prodigy.com>
References: <7A3Qb.4870$AK2.3953@newssvr29.news.prodigy.com>
	<mailman.689.1074867434.12720.python-list@python.org>
	<grmQb.15157$yd7.13778@newssvr27.news.prodigy.com>
Message-ID: <but032$ofc$1@news.service.uci.edu>


> It is a small subset, but an important subset.  Shell scripting started
> probably when people got sick of typing the same commands into the prompt.
> For a language to really support shell scripting, it should provide a way of
> automating the process of typing in the commands.  As in, there should be no
> difference whether you're actually typing, or you're running the script.

Python is not a shell, nor scripting language.  It does contain an 
interactive interpreter for executing Python code, and it does have 
support for executing programs through calling a shell, but that does 
not necessitate (or warrant) it having every feature for shell scripting 
that everyone wants.

JanC makes a great point about the fact that commands are run in a 
subshell, and any environment changes are lost when the subshell 
terminates.  I believe this is by design.

Perhaps you should look into os.popen2 and friends.  You can execute a 
command shell (cmd.exe or command.com), send it commands, and read its 
output.  On Windows it is a little awkward right now, but os.popen5 is 
supposed to make it easy to deal with such things.  Hopefully it will 
make it into Python 2.4.

  - Josiah


From jcarlson at uci.edu  Thu Jan 22 14:39:02 2004
From: jcarlson at uci.edu (Josiah Carlson)
Date: Thu, 22 Jan 2004 11:39:02 -0800
Subject: I support PEP 326
References: <mailman.654.1074788734.12720.python-list@python.org>
Message-ID: <20040122113148.BF3E.JCARLSON@uci.edu>

> I've recently had a couple of cases of needing exactly what it proposes, and
> having to kluge around the fact that it's not there. It's a great idea.
> 
> If there anywhere else I should be expressing my opinion on this, let me
> know.

Gary,

I'm glad you like my PEP.  In general, many other people have found the
objects to be a useful addition.  Seemingly the only stalling point is
where the Max/Min values are going to be placed, and what they should be
called.  If you feel like looking at a listing of the possible locations
and names, check the previous version in cvs:
http://cvs.sourceforge.net/viewcvs.py/*checkout*/python/python/nondist/peps/pep-0326.txt?content-type=text%2Fplain&rev=1.2

The listing was removed in the latest version because it detracted from
the specific functionality, which is more important than location.  If
you feel like posting your exact use for the Max/Min value, that would
be great.

 - Josiah



From news at badblocks.de  Sat Jan 31 08:52:45 2004
From: news at badblocks.de (Walter Haslbeck)
Date: Sat, 31 Jan 2004 14:52:45 +0100
Subject: problem with weakref.proxy
Message-ID: <diose1-fr8.ln1@smell.butthole.homeunix.net>

Hello,

I'm a completly Python newbie. As a first learning project I want to port
an game-engine I have writte some time ago in pure C to Python using OO
methods.

So I created a base-class 'GOb' (GameObject). This class should have
a sorted list of all instances stored as as class-attribte __olist[].

When I add a reference of the new created object in the constructor
(with GOb.__olist.append(self)) I have 2 references to each created
instance and if I 'del' the instance the destructor is not called,
because __olist[] holds another reference to that object.

Now I got to tip to use the weakref module. Well I thought this should
be exactly what I need and changed the program to add not a reference
to the instances but a weakref.proxy.

So now my instances are deleted really deleted when I use 'del', but:
How do get corresponding weakref.proxy object out of __olist[]?

I tried to use the callback parameter from weakref.proxy, but at the
time when the callback takes place, the proxy object is allready 'dead',
I get an Exception when I try to remove the proxy-instance from __olist[]:

Exception exceptions.ReferenceError: 'weakly-referenced object no
longer exists' in <function proxy_callback at 0x4040c02c> ignored

And if I iterate throu all objects in __olist[] I get an
'ReferenceError: weakly-referenced object no longer exists'


please look at the following source:

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

import weakref

class GOb:

    __olist=[]

    def c_show_all():
	print "all GObs, sorted by priority:"
	for i in GOb.__olist:
	    i.show()

    def proxy_callback(x):
	print "weakref.proxy callback"
	GOb.__olist.remove(x)

    proxy_callback=staticmethod(proxy_callback)
    c_show_all=staticmethod(c_show_all)

    def __init__(self, name="GOB", priority=0):
	self.priority=priority
	self.name=name
	ref=weakref.proxy(self, GOb.proxy_callback)
	GOb.__olist.append(ref)
	GOb.__olist.sort()
    
    def __del__(self):
	print "Destruktor called for GOB " + self.name

    def show(self):
	print self.name + " " + str(self.priority)

    def __cmp__(self, other):
	if self.priority < other.priority:
	    return -1
	elif self.priority == other.priority:
	    return 0
	else:
	    return 1

if __name__ == '__main__':

    a=GOb("T1", 0)
    b=GOb("T2", 2)
    c=GOb("T3", 1)
    
    GOb.c_show_all()
    print "delete T1:"
    del a
    GOb.c_show_all()

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

any hints?

Walter


From Majordomo-owner at cert.org  Thu Jan 29 04:56:09 2004
From: Majordomo-owner at cert.org (Majordomo-owner at cert.org)
Date: Thu, 29 Jan 2004 04:56:09 -0500
Subject: Majordomo results: test
Message-ID: <200401290956.i0T9uDc6015793@ioannes.indigo.cert.org>

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From tepihlaj at NOpaju.SPAMoulu.fi  Mon Jan  5 07:59:36 2004
From: tepihlaj at NOpaju.SPAMoulu.fi (Tero Pihlajakoski)
Date: 5 Jan 2004 12:59:36 GMT
Subject: Python/C and PYTHONPATH
Message-ID: <btbn3o$5oo$1@ousrvr3.oulu.fi>

Hi,

I've been experimenting on embedding Python to a C software, and ran into
a little problem with PYTHONPATH (I'm running on linux). Here's the deal:

When trying to call PyImport_Import("xyz"), Python returns an error "No
module named xyz". The problem _seems_ to be that I had no PYTHONPATH
variable defined (though python-shell works ok regardless), since the
following in bash helps:

<try, no go>
PYTHONPATH=
export PYTHONPATH
<try, works ok>

I'm not defining anything as the PATH, and now it works. Why doesn't it
look from "." without a dummy PYTHONPATH? Or is this actually a bug fixed
in a newer release (running 2.3.?)?

What is the "official" way to solve this? PySetProgramName()? Shell
script?

Thanks, 
  - Tero

-- 



From ketulp_baroda at yahoo.com  Mon Jan 12 06:30:04 2004
From: ketulp_baroda at yahoo.com (ketulp_baroda at yahoo.com)
Date: 12 Jan 2004 03:30:04 -0800
Subject: what is best for web development??
References: <f046efac.0401100358.5aa812a0@posting.google.com>
	<87wu80559x.fsf@blakie.riol>
Message-ID: <f046efac.0401120330.5c2e7c50@posting.google.com>

Wilk <wilkSPAM at OUTflibuste.net> wrote in message news:<87wu80559x.fsf at blakie.riol>...
> ketulp_baroda at yahoo.com writes:
> 
> > i am developing a web application and i am really confused on what should i use.
> > should i use just python and use the cgi module availabe.
> > Or should i use application like WebWare.Also there is PSP available.
> > I am really confused and need help
> 
> It depends of the kind of application you want to do exactly, there are
> many possibilities from cgi to zope...
> 
> Look into the archive of the list, you'll find a lot of answer to this
> question. Or describe more what you need.
> 
> bye


hey thanks for ur reply
i am developing an issue tracking system 
the primary requirements are
1)it should be platform independent which i think python will take
care of
2)it should have customizable gui .I am thinking of using templates
for this like Cheetah. Is there any other better solution to Cheetah?
The problem i am facing here is i dont know what to use for
development of the application. I came across many ways to develop web
application in python which I already specified like
i)the cgi module in python
ii)Python Server Pages
iii)Quixote
iv)WebWare
v)Zope etc.
I want to choose such an environment so that i dont have to install
other softwares to run my application.For eg. I think if I develop
using zope then the client also has to install zope to run my software
and i dont want this.


From maketo at gronland.freeshell.org  Mon Jan 26 00:36:17 2004
From: maketo at gronland.freeshell.org (Ognen Duzlevski)
Date: Mon, 26 Jan 2004 05:36:17 +0000 (UTC)
Subject: ReadDirectoryChangesW (windows)
References: <bv21j3$ong$1@chessie.cirr.com>
	<bv26vb$2cem$1@arachne.labyrinth.net.au>
Message-ID: <bv290h$paf$1@chessie.cirr.com>

Mark Hammond <mhammond at skippinet.com.au> wrote:

>> I don't have much experience using pywin32 and I am puzzled by the last line "Must be None". Does this mean 
>> asynchronous access is not supported? Or am I ready to actually RTFM if someone can politely point me to one? :)

> I'm afraid it is not yet supported.  Patches gratefully accepted (and I 
> am willing to help) :)

I am willing to work on this if I am pointed in the right direction :). I checked out the code in win32file.i and it 
suggests to look at ReadFile(). I think I can come up with something.
Ognen


From tzot at sil-tec.gr  Thu Jan 15 09:54:32 2004
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Thu, 15 Jan 2004 16:54:32 +0200
Subject: TUPLE & LIST
References: <%7xNb.55$Uw3.50@newsr2.u-net.net>
Message-ID: <cbad00ljgqjc1dpm4quo8skjd3obc2m154@4ax.com>

On Thu, 15 Jan 2004 15:08:42 +0100, in comp.lang.python you wrote:

>HI,
>
>1) what are the differences between list and tuple?

A list is a mutable (ie updatable) container for objects; you can add or
remove objects as much as you like.  A tuple is an immutable (ie not
updatable) container, which, once created, cannot change.

The general idea is that a tuple is something like a record in Pascal or
a struct in C (without any named members), so the order of its contents
is important.  For example, the function localtime of the time module
returns a tuple, whose first member is the year, second member is the
month etc.
OTOH, the order of some list's contents should bear no special meaning;
therefore a list has methods as .sort(), .reverse() etc.

Examples:
Use a list for a list of names.
Use a tuple for (x,y) coordinates in some area.
Use a list of (name,phone,address) tuples for your poor man's address
book which you will implement in python.

>2) how to concatenate tuple and list? no method, no op?tor?

Convert either one to the type of the other.

If the final result should be a tuple, do something like:

final_tuple= your_tuple + tuple(your_list)

But you probably want a list, so do something like:

final_list= list(your_tuple) + your_list

>3) im looking the fucking manual, and cant add value in my tuple, when it
>already created :/

That's the whole idea, like the FM says in
http://www.python.org/doc/current/ref/types.html .  A tuple cannot be
changed, therefore it consumes less space than a list and can be used as
a key, say, in a dictionary (unlike a list).

>  how to do it?

# You can't, but tuples can be concatenated:

>>> a = 1,2,3
>>> b = 4,5,6
>>> print a
(1, 2, 3)
>>> print b
(4, 5, 6)
>>> print a+b
(1, 2, 3, 4, 5, 6)

# or sliced:

>>> print a[:2]+b[2:]
(1, 2, 6)

# or indexed

>>> print "the first member of %s is %s" % (a, a[0])

HTH
-- 
TZOTZIOY, I speak England very best,
Ils sont fous ces Redmontains! --Harddix


From deets_noospaam at web.de  Mon Jan 26 17:07:14 2004
From: deets_noospaam at web.de (Diez B. Roggisch)
Date: Mon, 26 Jan 2004 23:07:14 +0100
Subject: Newbie : innerproduct function from Numarray
References: <bv40rm$ra$1@news.Stanford.EDU>
Message-ID: <bv432j$vi9$06$1@news.t-online.com>

> 1)
> from Numarray import innerproduct
> output = []
> temp = vector1 + vector1    # temp is twice the length of vector1
> for i in range(2000):
>      output.append(innerproduct(temp[i:(i+2000)],vector2)
> 2)
> output = []
> temp = vector1 + vector1
> for i in range(2000):
>     sum = 0
>     for j in range(2000):
>         sum += temp[i+j] * vector2[j]
>     output.append(sum)
> 
> I thought the first method using Numarray should be faster.
> But it looks like the second method is faster.
> Am I doing anything wrong?
> Do you guys know any faster way to do this?

First of all, I assume that both results are equal :)

>From the numarray-docs:

----
innerproduct(a, b) 
innerproduct produces the inner product of arrays a and b. It is equivalent
to matrixmultiply(a, transpose(b)). 
----

I'm not sure what this means mathematically (I understand the operation
made, but I'm not sure what an inner product _means_).

However, what you do with your hand-written code doesn't look like what I
would write if I would come up with my own implementation of the
aforementioned definition of innerproduct. Matrix-multiplication is
O(n**3), while your code is in O(n**2). So it seems that your special-case
with vectors, not arrays, produces an easier to compute variant of
innerproduct - and the differenes of n-times is of course important.

BTW: Its better to use xrange instead of range, it won't create the actual
list of numbers, but an iterable object instead - saves memory and time :)

Diez




From gerrit at nl.linux.org  Sun Jan  4 08:43:37 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Sun, 4 Jan 2004 14:43:37 +0100
Subject: Filename type (Was: Re: finding file size)
In-Reply-To: <bt8njq$gvd$00$1@news.t-online.com>
References: <4V4Jb.12709$Vl6.2811218@news20.bellglobal.com>
	<bt3l9i$pog$07$3@news.t-online.com>
	<mailman.45.1073125105.12720.python-list@python.org>
	<bt6c23$c6u$07$1@news.t-online.com>
	<20040103165041.GA31412@nl.linux.org> <3FF740ED.9020909@rogers.com>
	<mailman.68.1073206424.12720.python-list@python.org>
	<bt8njq$gvd$00$1@news.t-online.com>
Message-ID: <20040104134337.GA15231@nl.linux.org>

Peter Otten wrote:
> While a string is the default that you read from files and GUI widgets, a
> filename will never be.

I'm not so sure about that. A GUI where a file is selected from the list
could very well return a Path object - it won't for a while, of course,
but that's a different issue. But I agree that is often isn't. Just as
an integer is not something you read from a file, etc. 

> So expect to replace e. g.
> 
> os.path.exists(somestring) 
> 
> with 
> 
> os.filename(somestring).exists()
> 
> which is slightly less compelling than somefile.exists().

I would rather read:
path(somestring).exists()

which is better than os.filename(somestring).exists() and, IMO, better
than os.path.exists(somestring). I think path should be a builtin.

> Are unicode filenames something we should care about?

That's a difficult issue. I don't know how to solve that. 

> Should filename really be a subclass of str? I think somepath[-1] could
> return the name as well.

It could. But I don't think it should. This would mean that the index of
a path returns the respective directories. Explicit is better than
implicit: somepath[-1] is not very explicit as being a basename.

> Should files and directories really be of the same class?

Directories could be a subclass, with some more features. But...

> These to me all seem real questions and at that point I'm not sure whether a
> filename class that looks like a light wrapper around os.path (even if you
> expect os.path to be implemented in terms of filename later) is the best
> possible answer.

...questions exist to be answered. I don't claim to know all answers,
but I think OO-ifying os.path is a good thing. How - that's another
issue, which is PEP-worthy.

>From earlier discussions, I get the impression that most people are
sympathic about OO-ifying os.path but that people don't agree in how to
do it. If we can agree on that, the only thing we need to do is
upgrading the BDFL's judgement from lukewarm to liking :)

I've written a Pre-PEP at: http://tinyurl.com/2578q
It is very unfinished but it is a rough draft. Comments welcome.

yours,
Gerrit.

-- 
132. If the "finger is pointed" at a man's wife about another man, but
she is not caught sleeping with the other man, she shall jump into the
river for her husband.
          -- 1780 BC, Hammurabi, Code of Law
-- 
Asperger's Syndrome - a personal approach:
	http://people.nl.linux.org/~gerrit/english/



From spam-trap-095 at at-andros.demon.co.uk  Sun Jan  4 16:17:49 2004
From: spam-trap-095 at at-andros.demon.co.uk (Andrew McLean)
Date: Sun, 4 Jan 2004 21:17:49 +0000
Subject: Sending e-mail with python 1.5.2
References: <fM6PlaqxCD+$EwGQ@at-andros.demon.co.uk>
	<7xisjrsox7.fsf@ruckus.brouhaha.com>
Message-ID: <3B5VWew9LI+$EwTm@at-andros.demon.co.uk>

Thanks. smtplib was what I was looking for.

In article <7xisjrsox7.fsf at ruckus.brouhaha.com>, Paul Rubin 
<http@?.cx.invalid> writes
>I thought 1.5.2 had the smtp package.  If not, how about just using
>popen to send the mail through /bin/mail.

-- 
Andrew McLean


From python at quixs.com  Tue Jan 20 11:57:17 2004
From: python at quixs.com (Lars Heuer)
Date: Tue, 20 Jan 2004 17:57:17 +0100
Subject: Please Help Me (Re: needed PyXPCOM tutorial.)
In-Reply-To: <425cc8d1.0401200844.f6dcf9c@posting.google.com>
References: <425cc8d1.0401150908.287de0d8@posting.google.com>
	<mailman.415.1074196966.12720.python-list@python.org>
	<425cc8d1.0401170903.3c331ab9@posting.google.com>
	<425cc8d1.0401200844.f6dcf9c@posting.google.com>
Message-ID: <1112279586.20040120175717@quixs.com>

Hi mir,

> Please help me  find some tutorials on pyxpcom. my project is at hold due to it.

Maybe you should begin to ask specific questions, either in this
mailinglist or pyxpcom at listserv.ActiveState.com or pyxpcom at mozdev.org
Maybe someone knows the answer.

Here's an additional link:
> http://www.mozilla.org/docs/xul/xulnotes/xulnote_oven.html

and some sourcecode from the article:
> http://www.mozilla.org/docs/xul/xulnotes/XUL.py.txt

Best regards,
Lars




From mi-mal at o2.pl  Fri Jan  9 09:19:51 2004
From: mi-mal at o2.pl (Mimal)
Date: Fri, 09 Jan 2004 15:19:51 +0100
Subject: CGI module problem: duplicated output
Message-ID: <btmd8o$f2g$1@sea.gmane.org>

Hello,
     I started to learn how to use python with CGI. I went through some 
tutorials, but then I found one problem, that seems to be something 
stupid. I tried to find answer using google, but I couldn't.

This is my simple CGI script:

#!/usr/bin/python
import cgi

print "Content-type: text/html\n"
print "<html>Hello, world!</html>"

After I run it under Apache I got (HTML source code):

Hello, world!Content-type: text/html Hello, world!

I tried to run it under bash console. I got this:

<html>Hello, world!</html>
Content-type: text/html

<html>Hello, world!</html>

That's very strange for me. I'm using Mandrake 9.2 + Apache 2 + Python 
2.3, but the same problem occurs under WinNT + Python 2.1 and WinXP + 
Zope + Python 2.3.

Thanks in advance for help!

-- 
Mimal





From jcarlson at nospam.uci.edu  Mon Jan 26 10:14:27 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Mon, 26 Jan 2004 07:14:27 -0800
Subject: need something like threads, or just multiple simulateous exec's
In-Reply-To: <sdq2vb.h8h.ln@energy.uch.net>
References: <sdq2vb.h8h.ln@energy.uch.net>
Message-ID: <bv3b0k$a0j$1@news.service.uci.edu>

Serge A. Ribalchenko wrote:
> Hi all,
> 
> I'm new in python coding...
> Can someone point me how can I do such a usual thing? I need to ping
> some hosts, and harvest results in one list. Just cause there is about 
> 120 hosts in the LAN, and approx. 10% is down at working hours, pinging
> each host at a time from cycle is VERY slow solution.
> I did:
> retv = os.popen('ping -c 1 ' + ip + ' |grep \"1 packet\" |awk  \'{print 
> $4}\'')
> res = retv.read()
> In cycle. BUT. I need something FASTER. And I feel fear to scary word 
> 'thread'. May someone give me some examle using threads for this 
> purpose? Thanks.
> 
> 
> Best wishes,
> ~       Serge.
> 

import threading
import Queue
import os

output = Queue.Queue()

def f(ip, output=output):
     output.put(os.popen('ping -c 1 ' + ip + ' |grep \"1 packet\" \ 
|awk\'{print > $4}\'')


for ip in host:
     threading.Thread(target=f, args=(ip,)).start()

for ip in host:
     print output.get()


  - Josiah


From t-meyer at ihug.co.nz  Tue Jan 20 20:08:20 2004
From: t-meyer at ihug.co.nz (Tony Meyer)
Date: Wed, 21 Jan 2004 14:08:20 +1300
Subject: Installing SpamBayes
In-Reply-To: <1ED4ECF91CDED24C8D012BCF2B034F1304BA3BE9@its-xchg4.massey.ac.nz>
Message-ID: <1ED4ECF91CDED24C8D012BCF2B034F1304677851@its-xchg4.massey.ac.nz>

FWIW, you're probably better asking these questions on the spambayes mailing
list - spambayes at python.org.

> The instructions that came with SpamBayes says it.  THey say 
> to either run the setup.py file in the Python GUI (IDLE) or 
> froma command prompt.  I have tried both to no avail...

You should ensure that you have an official spambayes release - download it
from the sourceforge site: <http://sf.net/projects/spambayes>.  The
instructions (presumably README.txt) do not say anything about IDLE.

Forget about using a GUI - use a command prompt.  What you need to do
depends on what type of command prompt that is - it seems like you're using
Outlook Express, so it's probably a Windows one.  In that case, you might
need to specify the path to python explicitly, if it's not on the PATH.

Try using this command in the command prompt (ensuring that you are in the
directory that you expanded the spambayes archive into):

  c:\python23\python.exe setup.py install

Note that this assumes that you installed Python 2.3 into C:\Python.  If
that's not the case, you'll need to adjust that a bit.

=Tony Meyer




From anthony at interlink.com.au  Wed Jan 21 09:55:16 2004
From: anthony at interlink.com.au (Anthony Baxter)
Date: Thu, 22 Jan 2004 01:55:16 +1100
Subject: Interfacing with Voice modem 
In-Reply-To: <B06B8FEF47ACD7119E720040F4284591047D8A@esrimail.gims.com> 
Message-ID: <20040121145516.ECB8D25ADD5@bonanza.off.ekorp.com>


>>> Etienne Labuschagne wrote
> Hi all,
> 
> A callcenter-like app that we are writing in Python will need recording
> functionality for voice conversations.  I am thinking of doing this through
> a voice modem.

It's not using a voice modem, but Shtoom (shtoom.sf.net) will soon have
applications for recording &c using VoIP. 

Anthony
-- 
Anthony Baxter     <anthony at interlink.com.au>   
It's never too late to have a happy childhood.




From borkxorfoo at hotmail.com  Tue Jan 27 04:34:42 2004
From: borkxorfoo at hotmail.com (bor)
Date: Tue, 27 Jan 2004 01:34:42 -0800
Subject: Fw: How does compare work?..Of no help, but...
Message-ID: <Law15-DAV59u9PH3IhA000235db@hotmail.com>





of no help, so just <snip> if you hate that sort of thing...

 if 2 > '1' : print "greater"
 else       : print "less_or_equal"

   prints  less_or_equal

 As it should, because the condition 2>'1' is not true..
 Give a machine a conditional statement that doesn't return true, followed
by
 an else... etc

 Under most circumstances, python is fairly logical. In this case, too.

 However...

 class C:
      def __init__(self): pass

 X=C()
 if 2 > X : print "greater"

    prints  greater

 Now *here* I see exactly what you're saying.
 I'd noticed this slight oddness too..
 First example doesn't really exhibit the behaviour, but this one bothers
 slightly. I'm not really on top of the technical stuff about python, but
I'd
 had all sorts of obvious thoughts about this one like could the comparison
 be taking
 an instance to have 'no' numerical value ie 'none' when using some
 particular comparison method?

 I'd be interested to know this one myself...



 =============================

 M. Harris
 Sr Developer
 DNM, Inc.




From forshtat at hotmail.com  Sat Jan 31 12:18:14 2004
From: forshtat at hotmail.com (Ziv Forshtat)
Date: 31 Jan 2004 09:18:14 -0800
Subject: Simple web proxy - help needed
Message-ID: <c335e460.0401310918.49361638@posting.google.com>

Hi all,
I'm looking for a simple web proxy in python to use in order to
demonstrate a web page classifier that I have developed.
I checked around the web and tried some of the existing free servers
such as the Tiny proxy server, CTC and others. The problem is that at
least on my winxp machine all of these servers only seem to work with
some sites but consistently generate exceptions with others. I keep
getting "connection reset by peer" and "software caused connection
abort"...
Perahps someone has already encountered this problem and solved it??
Basically, what I need is to plug my web page classifier into a simple
web proxy, so that pages pass through my classifier before they are
relayed to the client.
I really need to get this - or something of the sort - done as part of
a university project. Another option might be in the form of an
internet browser plugin that will communicate with my classifier to do
the job.
Problem is - I don't have to much background in writing proxies, nor
in writing plugins.
Any help and suggestions would be welcome. 

Ziv


From hans at zephyrfalcon.org  Sun Jan 25 19:34:57 2004
From: hans at zephyrfalcon.org (Hans Nowak)
Date: Sun, 25 Jan 2004 19:34:57 -0500
Subject: xrange not hashable - why not?
In-Reply-To: <40145F20.7070402@zephyrfalcon.org>
References: <20040125144724.GA13741@nl.linux.org>	<40145A07.2070906@zephyrfalcon.org>	<20040126001145.GB2593@unpythonic.net>
	<40145F20.7070402@zephyrfalcon.org>
Message-ID: <401460B1.40309@zephyrfalcon.org>

I wrote:

> Huh.  This is really weird:
> 
> (C:\) $ python22
> Python 2.2.2 (#37, Oct 14 2002, 17:02:34) [MSC 32 bit (Intel)] on win32
> Type "help", "copyright", "credits" or "license" for more information.
>  >>> hash(xrange)
> 503376880

Um, duh...

 >>> hash(xrange(0))
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
TypeError: unhashable type

-- 
Hans (hans at zephyrfalcon.org)
http://zephyrfalcon.org/




From gerrit at nl.linux.org  Sun Jan 25 09:47:24 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Sun, 25 Jan 2004 15:47:24 +0100
Subject: xrange not hashable - why not?
Message-ID: <20040125144724.GA13741@nl.linux.org>

Hi,

why is an xrange object not hashable?
I was trying to do something like:

comments = {
    xrange(0, 4): "Few",
    xrange(4, 10): "Several",
    xrange(10, 100): "A lot",
    xrange(100, sys.maxint): "Can't count them"}
for (k, v) in comments.items():
    if n in k:
        commentaar = v
        break

Because:
    - I found it easier to extend than:
          if 0 <= n < 4: return "few"
          elif ... # etc
    - And better readable than:
          if k[0] <= n < k[1]: # using tuples
    - And much more memory efficient than tuple(...) (especially the
      last one ;-)
   
It would not be difficult to let xrange have a hash:

    hash((self.start, self.step, self.stop))

would be sufficient, I think.

Hmm, start, step and stop appear to have disappeared in Python 2.3...
certainly makes it somewhat more difficult. I shouldn't even to containment
testing according to PEP 260, and Python 2.3.3 should warn me not to
do... it doesn't, however.

So, should I use one of the alternatives after all? Or does someone have
something better to offer?

yours,
Gerrit.



From __peter__ at web.de  Mon Jan 19 12:00:59 2004
From: __peter__ at web.de (Peter Otten)
Date: Mon, 19 Jan 2004 18:00:59 +0100
Subject: subclassing "file"
References: <bugvp5$rvd$1@news.rz.uni-karlsruhe.de>
Message-ID: <buh2aa$qia$03$1@news.t-online.com>

Uwe Mayer wrote:

> Hi,
> 
> when extending a build in class, what does the constructor __init__(...)
> have to return?
> and how does the constructor call its base-class construtor? (or is this
> done automatically?)
> 
> I want to derive from "file" to create a class that reads record from a
> binary file:
> 
> class myFile(file):
>         def __init__(self, filename, mode="r", bufsize=-1):
>                 ....?...
> 
> just calling the basename and the constructor does not work:
> 
>>>> f = myFile("testfile")
>>>> f
> <closed file '<uninitialized file>', mode '<uninitialized file>' at ...>
> 
> What am I missing?
> 
> Thanks for your comments
> Ciao
> Uwe

When you don't want to do anything in the constructor __init__(), it
suffices to override the methods of interest, e. g.:

>>> class myfile(file):
...     def write(self, s):
...             file.write(self, s.upper())
...
>>> f = myfile("tmp.txt", "w")
>>> f.write("a foolish consciousness")
>>> f.close()
>>> file("tmp.txt").read()
'A FOOLISH CONSCIOUSNESS'

Otherwise call base.__init__(self, someargs), e. g:




From ATPL_SMTP_Gateway at ggn.aithent.com  Fri Jan 30 04:48:02 2004
From: ATPL_SMTP_Gateway at ggn.aithent.com (ATPL_SMTP_Gateway at ggn.aithent.com)
Date: 30 Jan 2004 15:18:02 +0530
Subject: Content violation
Message-ID: <SMTPtEvzoxJ6sJ9amqk000005b8@ggn.aithent.com>

This is an automated response.

Content violation found in email message.
Email Message Dropped.

From: python-list at python.org
To: shaveenk at ggn.aithent.com

File(s): test.exe

Matching filename: *.exe





From noemail at noemail4u.com  Fri Jan  9 07:03:16 2004
From: noemail at noemail4u.com (Dang Griffith)
Date: Fri, 09 Jan 2004 12:03:16 GMT
Subject: os.system always opens new window on Windows XP/2000
References: <d0132d7d.0401061045.73c28639@posting.google.com>
Message-ID: <787bf9d383653f297a4d86a6dad2733e@news.teranews.com>

On 6 Jan 2004 10:45:59 -0800, ohgoddearlord at yahoo.com (John) wrote:

>Can anyone tell me how to run a bunch of commands in the same command
>line window?  When I do this:
>
>system("command1")
>system("command2")
>...
>
>it opens a new window for every system call.  The alternative I can
>think of is to write out the command to a batch file and run that, but
>I'm wondering if there is a better way to do it.

I would recommend reading a little more about the os, shutil, and
system modules and doing it all in Python.  I would especially advise
you to do that if you're seriously considering a batch file instead.
Unless you're going to have people without Python run the same batch
file, you may as well build your script in Python, which is something
it is touted for being good at.
    --dang


From jjl at pobox.com  Thu Jan 15 08:51:48 2004
From: jjl at pobox.com (John J. Lee)
Date: 15 Jan 2004 13:51:48 +0000
Subject: best book
References: <mailman.372.1074117050.12720.python-list@python.org>
	<t1kb0011sp7p3804ueoujjjeihsu1tkb2m@4ax.com>
	<38ec68a6.0401141946.70fa3aa5@posting.google.com>
Message-ID: <87zncp9v63.fsf@pobox.com>

afriere at yahoo.co.uk (Asun Friere) writes:

> Terry Carroll <carroll at tjc.com> wrote in message news:<t1kb0011sp7p3804ueoujjjeihsu1tkb2m at 4ax.com>...
> > On Thu, 15 Jan 2004 03:32:31 +0530, km <km at mrna.tn.nic.in> wrote:
> 
> > My favorite to start is O'Reilley's "Learning Python."
> > 
> > Try to borrow it, rather than buy it, though, or at least buy a used copy.
> 
> 
> The problem with that is that a used or borrowed copy is unlikely to
> be the (new) 2nd edition, (see
> http://www.oreilly.com/catalog/lpython2/) which covers up to Python
> 2.3.  (The older version is badly outdated).  Besides which, if you
> actually buy a copy they might consider a 3rd edition at some time in
> the future.

You can subscribe to safari.oreilly.com for 2 weeks, then cancel and
pay nothing.


John


From skip at pobox.com  Mon Jan 26 15:46:45 2004
From: skip at pobox.com (Skip Montanaro)
Date: Mon, 26 Jan 2004 14:46:45 -0600
Subject: Guardian: open source is a throwback says Jack Schofield
In-Reply-To: <090801c3e44b$1b434760$6401fea9@YODA>
References: <64cff82f.0401251143.328388bd@posting.google.com>
	<mailman.772.1075066543.12720.python-list@python.org>
	<bv1jkf$g46$1@namru.matavnet.hu>
	<bv1pgj$ctl$3@news.service.uci.edu> <40156FB6.F71C19B0@engcorp.com>
	<16405.30020.406117.575663@montanaro.dyndns.org>
	<090801c3e44b$1b434760$6401fea9@YODA>
Message-ID: <16405.31925.108832.399438@montanaro.dyndns.org>

    Dave> Skip wrote:
    >> Pardon me, but I don't want "a regular guy" in this particular position.  I
    >> want the god damned smartest, most capable person we can find.

    Dave> The real problem is that these days there's no way the smartest,
    Dave> most capable person would ever run for public office.

Yeah, I know.  I just needed to get that off my chest.

Skip



From peter at engcorp.com  Mon Jan 12 09:37:51 2004
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 12 Jan 2004 09:37:51 -0500
Subject: Straw poll on Python performance (was Re: Python is far froma
 top performer ...)
References: <E1AfJWJ-0000N7-Ly@mail.python.org>
	<mailman.272.1073762530.12720.python-list@python.org>
Message-ID: <4002B13F.131CD509@engcorp.com>

"Michael T. Babcock" wrote:
> 
> >From: "Peter Hansen" <peter at engcorp.com>
> >
> >I have to say that I do, but I'm also dealing with datasets up to about
> >500MB in the worst case - but about 10-20MB in the normal case.

Please edit your attributions more carefully.  I did not write the
above; "Tim Delaney" <tcdelaney at optusnet.com.au> wrote it.

-Peter


From exarkun at intarweb.us  Mon Jan 19 23:29:24 2004
From: exarkun at intarweb.us (Jp Calderone)
Date: Mon, 19 Jan 2004 23:29:24 -0500
Subject: speedy Python strings?
In-Reply-To: <100p9kl96uri9e1@corp.supernews.com>
References: <buhtjb$ida$1@news.rz.uni-karlsruhe.de>
	<pan.2004.01.20.03.02.31.383045@bmsi.com>
	<100p9kl96uri9e1@corp.supernews.com>
Message-ID: <20040120042924.GB5184@intarweb.us>

On Mon, Jan 19, 2004 at 10:53:47PM -0500, Francis Avila wrote:
> Stuart D. Gathman wrote in message ...
> >#         text = struct.unpack("L", self.buffer[:4])
> >#         self.buffer = self.buffer[4:]
> >   pos = self.pos
> >   text = struct.unpack("L", self.buffer[pos:pos+4])
> >   self.pos = pos + 4
> 
> 
> In this vein, I would also recommend looking at the array module.  You
> didn't describe the data structure, but if each record is simply a list of
> 4-byte integers, you could convert the whole record to ints at once like so:
> 
> record = array.array('L', stringorlist)
> Then, perform your loops on record, which will be a list-like object
> supporting item insertion and deletion, and conversion to bytestrings and
> other Python base types.
> 

  Also note the existence of fromfile() - the array module actually makes it
possible to do this incredibly efficiently:

    a = array.array('L')
    a.fromfile(openFileObj, count)

  Jp



From fumanchu at amor.org  Fri Jan  9 17:34:58 2004
From: fumanchu at amor.org (Robert Brewer)
Date: Fri, 9 Jan 2004 14:34:58 -0800
Subject: Straw poll on Python performance (was Re: Python is far from a
	top performer ...)
Message-ID: <DE1CF2B4FEC4A342BF62B6B2B334601E561BE0@opus.amorhq.net>

> Do you spend a "significant" amount of time actually
> optimizing your Python applications?  (Significant is
> here defined as "more than five percent of your time",
> which is for example two hours a week in a 40-hour
> work week.)

No, I don't. The big object server I'm working on now for four months
(which actually *has* some performance requirements) has had _one_
optimization round. I noticed some slowness, profiled the problem down
to the DB layer, and solved it by switching my ADO recordset to
read-only. That cut the load time of objects to 1/3 of what it was
before the optimization. All the other operations to get that data laid
out on a web page were insignificant in comparison.

Generally, I tend to "worry" far more about interface design (for both
users and developers) than performance.


Robert Brewer
MIS
Amor Ministries
fumanchu at amor.org



From mark at mceahern.com  Fri Jan 30 09:25:49 2004
From: mark at mceahern.com (Mark McEahern)
Date: Fri, 30 Jan 2004 08:25:49 -0600
Subject: conditional expression sought
In-Reply-To: <P6iSb.334480$ts4.82507@pd7tw3no>
References: <pRbSb.330334$ts4.37644@pd7tw3no>	<mailman.1000.1075402284.12720.python-list@python.org>
	<P6iSb.334480$ts4.82507@pd7tw3no>
Message-ID: <401A696D.50906@mceahern.com>

Elaine Jackson wrote:

>Sorry to take so long but I wasn't sure what a "unit test" was (the other guy's
>post clarified it). Tell me if this isn't what you're looking for:
>
>falsies=[0,0.0,[],(),{},'',None]
>truies=[49,3.14,[1,2,3],(4,5,6),{7:8,9:10},'nonempty']
>
>def demo(A,B):
>    print "If A is ",A
>    print "and B is ",B
>    print "then (A[0] and B[0]) or (A[1] and B[1]) or (A[2] and B[2]) = ",
>    print (A[0] and B[0]) or (A[1] and B[1]) or (A[2] and B[2])
>
>A=[]
>from random import randint
>for i in range(3):
>    A.append(bool(randint(0,1)))
>B=truies[0:3]
>demo(A,B)
>
>A=[False,False,False]
>B=falsies[0:3]
>demo(A,B)
>print "I would have liked this to be B[2] = ",B[2]
>  
>

Try this:

def whatever(A, B):
    """I don't know what to call this function because it doesn't really 
make sense to me, but, whatever..."""
    c = zip(A, B)
    last = len(c) - 1
    for i, item in enumerate(c):
        a, b = item
        # If both items are true, return b.
        if a and b:
            return b
        # If we're at the last item, return b.
        if i == last:
            return b

print whatever(A, B)

import unittest

class test(unittest.TestCase):

    def testAllFalse(self):
        A = [False, False, False]
        B = [0, 0.0, []]
        expected = []
        actual = whatever(A, B)
        self.assertEquals(actual, expected)

    def testSomeTrue(self):
        A = [0, 1, 0, 1, 0, 1]
        B = ['a', 'b', 'c', 'd', 'e', 'f']
        expected = 'b'
        actual = whatever(A, B)
        self.assertEquals(actual, expected)

unittest.main()




From mark at diversiform.com  Wed Jan 28 12:22:45 2004
From: mark at diversiform.com (mark)
Date: Wed, 28 Jan 2004 09:22:45 -0800
Subject: Curious string behavior
Message-ID: <000001c3e5c3$5a63a8d0$5501a8c0@markxp>

I've encountered an anomaly while using the string module (specifically,
string.split).  Here's the snippet:
 
import string
 
address2 = ' '
line = 'function, dealer, type, firstname, lastname, vin, blank'
print 'Address2 Type (first check): ', type(address2)
function, dealer, type, firstname, lastname, vin, blank =
string.split(line, ',')
print 'Address2 type (second check): ', type(address2)
 
I've extracted this from a larger script, but the error happens roughly
the same way.  Now, here's what I would expect to see:
 
Address2 Type (first check):  <type 'str'>
Address2 type (second check):  <type 'str'>
 
Here's what I get instead:
 
Address2 Type (first check):  <type 'str'>
Address2 type (second check): 
Traceback (most recent call last):
  File
"C:\PROGRA~1\Python\lib\site-packages\Pythonwin\pywin\framework\scriptut
ils.py", line 310, in RunScript
    exec codeObject in __main__.__dict__
  File "C:\Program Files\Python\test1.py", line 7, in ?
    print 'Address2 type (second check): ', type(address2)
TypeError: 'str' object is not callable
 
What the heck is going on here?  I figure I'm just missing something.
 
- Mark Daley
Product Manager
Diversiform, Inc.
1-800-444-3445
 
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From Florian.Lindner at xgm.de  Fri Jan 30 12:11:12 2004
From: Florian.Lindner at xgm.de (Florian Lindner)
Date: Fri, 30 Jan 2004 18:11:12 +0100
Subject: HowTo Search in nested lists
Message-ID: <bve37i$a8h$04$1@news.t-online.com>

Hello,
I've two nested lists which are representing a table or matrix.

A = [1, 2, 3]
B = [4, 5, 6]
C = [7, 8, 9]

t = [A, B, C]

print t[0][2] # Prints 3

Now I found to search for certain values in a certain column.
For example: column 1, search for 5, return 1, because 5 is found in the
first column of the second element of t

I hope I could explain what I want. Is there any way to do that except:

for i in len(t):
  if t[i][1] == "phrase":
    found = i
    break

Thx,
Florian



From irmen at -NOSPAM-REMOVETHIS-xs4all.nl  Fri Jan 16 04:36:44 2004
From: irmen at -NOSPAM-REMOVETHIS-xs4all.nl (Irmen de Jong)
Date: Fri, 16 Jan 2004 10:36:44 +0100
Subject: Quick question.....
In-Reply-To: <qnkad4ok82o.fsf@arbutus.physics.mcmaster.ca>
References: <mailman.370.1074115102.12720.python-list@python.org>
	<379178f1.0401151634.556bb405@posting.google.com>
	<qnkad4ok82o.fsf@arbutus.physics.mcmaster.ca>
Message-ID: <4007b0ac$0$322$e4fe514c@news.xs4all.nl>

David M. Cooke wrote:
> At some point, featherstone80 at hotmail.com (Narsil) wrote:
>>NameError: global name 'sum' is not defined
>>
>>What did I do wrong?
> 
> 
> 'sum' as a builtin was introduced in python 2.3. You're using an older
> version.
> 

If you don't have sum, try:

	reduce(lambda x,y: x+y, numberlist)

instead.

--Irmen


From max at alcyone.com  Sat Jan 10 05:02:48 2004
From: max at alcyone.com (Erik Max Francis)
Date: Sat, 10 Jan 2004 02:02:48 -0800
Subject: end of a pickle file
References: <XZNLb.42329$JQ1.32480@pd7tw1no>
Message-ID: <3FFFCDC8.C4F361AF@alcyone.com>

Elaine Jackson wrote:

> How can I tell when I've gotten to the end of a pickle file? TIA

Try reading another object and getting the EOF error :-).

-- 
 __ Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
/  \ San Jose, CA, USA && 37 20 N 121 53 W && &tSftDotIotE
\__/ Punctuality is the virtue of the bored.
    -- Evelyn Waugh


From yshurik at fhb.kiev.ua  Sat Jan 17 06:27:59 2004
From: yshurik at fhb.kiev.ua (yshurik)
Date: Sat, 17 Jan 2004 13:27:59 +0200
Subject: Best Python IDE Code Completion!
References: <ba129ce7.0401150352.43e20efa@posting.google.com>
Message-ID: <bub64f$g1t$1@news.lucky.net>

John wrote:

> Hi,
>   Could you give your opinions on the best code completion in Python
> IDEs. My only complaint with PythonWin has been that the code
> completion support is incomplete. The interactive mode has better
> behavior than the editor. Tried to fix it but could not. Boa is not
> too different. At least when I last checked (a few months ago) Komodo
> and Visual Python were not very different either.
> 
>   Wing IDE seems converse. The editor auto list members is great but
> has no calltips. The interactive window has no completion at all.
> 
>   I have not checked PythonWorks and Black Adder in a while but their
> web sites do not seem to brag much in this direction.

About BlackAdder: because it is oriented to GUI programming.
in version 1.1 it will have completion for Qt classes and functions.
and completion to all words which happens in edited text.
(it is Vi - like style of completion - Ctrl-N, Ctrl-P)

> 
>   Python has great introspective capabilities and we have a great open
> contributing community. What technical difficulties keep us from
> having REAL code completion like MS, Borland and several Java IDEs
> (All of which have been funded at one time or the other if not
> entirely - perhaps this is the reason?)
> 
>   For me, code completion is a very important part of the coding
> experience and I really miss it in Python in it's full effect.

-- 
Best regards


From rmkrauter at yahoo.com  Sun Jan 25 22:37:19 2004
From: rmkrauter at yahoo.com (Rich Krauter)
Date: Sun, 25 Jan 2004 22:37:19 -0500
Subject: efficient updating of nested dictionaries
In-Reply-To: <H%_Qb.2609$925.1917@nwrddc02.gnilink.net>
References: <H%_Qb.2609$925.1917@nwrddc02.gnilink.net>
Message-ID: <1075088239.15570.15.camel@vaio>

The following is probably too dependent on the data type of the keys,
but it may be suitable in some programs. It's certainly not a general
solution for all cases. Others will have much better ideas, but here
goes anyway ...

You may want to use a non-nested dict with a 'superkey' composed of the
concatenation of the three keys, seperated by some delimiter.
use MY_DICT[KEY_X+'_'+KEY_Y+'_'+KEY_Z]=FOO

Then you could use update().You would just have to do some pre- and
post-processing of the keys. i.e. splitting or joining the 'superkey' by
the delimiter you choose.

Although, that's probably kind of lame - I bet others will have much
better suggestions. I'm interested in how other people do this too.
Rich


On Sun, 2004-01-25 at 21:33, omission9 wrote:

> I have a dictionary that looks like this
> MY_DICT[KEY_X][KEY_Y][KEY_Z]=FOO
> 
> I am having a problem updating this with a simple 
> MY_DICT.update(NEW_DICT) as update doesn't seem to care about getting 
> into the inner dicts.
> Getting the keys of each and iterating through and updating each one is 
> terribly slow as the number of keys gets bigger and bigger.
> What is the bst way to update my nested dicts?
> 
> 
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From francisgavila at yahoo.com  Tue Jan 13 17:37:39 2004
From: francisgavila at yahoo.com (Francis Avila)
Date: Tue, 13 Jan 2004 17:37:39 -0500
Subject: how can I execute a function string
References: <mailman.317.1073993898.12720.python-list@python.org>
Message-ID: <1008srnl5kni5c4@corp.supernews.com>

Premshree Pillai wrote in message ...
>You need to use eval() to run code on-the-fly. See
>http://www.python.org/doc/current/lib/built-in-funcs.html

Eval only evaluates expressions, not statements. A function definition is a
statement.  (Think about it: what would eval() return?)

--
Francis Avila



From donn at drizzle.com  Wed Jan  7 01:08:35 2004
From: donn at drizzle.com (Donn Cave)
Date: Wed, 07 Jan 2004 06:08:35 -0000
Subject: [Python-Dev] PEP 324: popen5 - New POSIX process module
References: None <mailman.100.1073314321.12720.python-list@python.org>
Message-ID: <1073455713.389751@yasure>

Quoth Michael Chermside <mcherm at mcherm.com>:
| Peter writes:
|> There's a new PEP available:
|> 
|> PEP 324: popen5 - New POSIX process module
|> 
|> A copy is included below. Comments are appreciated. 
...
| And I vote +1 on changing the name from "popen5" to something else.
| "process" (as suggested in the PEP) isn't too bad, but I'd certainly be
| open to another name. If this is to replace the entire rest of the popenX
| family for most normal purposes, a separate, more comprehensible name
| will help newbies find it.

"process" is not only ambiguous, it's a little off-target if the
software in question is more about executing foreign commands, as
opposed to process management in general.  So I'd be open to another
name, too.

	Donn Cave, donn at drizzle.com


From ferrell at diablotech.com  Wed Jan 21 13:13:40 2004
From: ferrell at diablotech.com (Robert Ferrell)
Date: 21 Jan 2004 10:13:40 -0800
Subject: Redefining __call__ in an instance
References: <73b00f0c.0401151529.676347b6@posting.google.com>
	<x7KdnVMXjpAPq5rdRVn-sw@comcast.com>
Message-ID: <73b00f0c.0401211013.29b5718a@posting.google.com>

Jason Mobarak <jmob at nospam__unm.edu> wrote in message news:<x7KdnVMXjpAPq5rdRVn-sw at comcast.com>...
> def firstFunc (s, word='up'):
>    print "foo"
> 
> class callNoWork(object):
>    def __new__ (cls):
>      cls.__call__ = firstFunc
>      return object.__new__(cls)
> 
> callNoWork()()
> 
> # Dunno if you've read this, but it explains this:
> # http://python.org/2.2.1/descrintro.html

Thanks for the pointer.  I had read this a while ago, it didn't all
sink in, and I'd forgotten about it.  That was exactly the info that I
needed.  In particular, it says that __call__ is a static method, so
it is not possible to define that differently for each instance.

The code above was a good reminder for me, but because __call__ is a
static method, any new instantiation redefines __call__ for all
existing instances.

Thanks for the pointer,
-robert


From elainejackson7355 at home.com  Thu Jan 29 20:06:55 2004
From: elainejackson7355 at home.com (Elaine Jackson)
Date: Fri, 30 Jan 2004 01:06:55 GMT
Subject: conditional expression sought
References: <pRbSb.330334$ts4.37644@pd7tw3no>
	<mailman.1000.1075402284.12720.python-list@python.org>
Message-ID: <P6iSb.334480$ts4.82507@pd7tw3no>

Sorry to take so long but I wasn't sure what a "unit test" was (the other guy's
post clarified it). Tell me if this isn't what you're looking for:

falsies=[0,0.0,[],(),{},'',None]
truies=[49,3.14,[1,2,3],(4,5,6),{7:8,9:10},'nonempty']

def demo(A,B):
    print "If A is ",A
    print "and B is ",B
    print "then (A[0] and B[0]) or (A[1] and B[1]) or (A[2] and B[2]) = ",
    print (A[0] and B[0]) or (A[1] and B[1]) or (A[2] and B[2])

A=[]
from random import randint
for i in range(3):
    A.append(bool(randint(0,1)))
B=truies[0:3]
demo(A,B)

A=[False,False,False]
B=falsies[0:3]
demo(A,B)
print "I would have liked this to be B[2] = ",B[2]


"Mark McEahern" <mark at mceahern.com> wrote in message
news:mailman.1000.1075402284.12720.python-list at python.org...
| Elaine Jackson wrote:
|
| >If bool(B_i)==True for 1<=i<=n and j is the smallest i with bool(A_j)==True,
| >then the evaluation of (A_1 and B_1) or ... or (A_n and B_n) returns B_j
without
| >evaluating any other B_i. This is such a useful mode of expression that I
would
| >like to be able to use something similar even when there is an i with
| >bool(B_i)==False. The only thing I can think of by myself is ( (A_1 and
[B_1])
| >or ... or (A_n and [B_n]) )[0], and I can't be satisfied with that for
obvious
| >reasons. Does anybody know a good way to express this? Any help will be mucho
| >appreciado.
| >
| Why not write a unit test that demonstrates the behavior you want?
| It'll then likely be obvious to someone both what your problem is and
| what a likely solution is.
|
| Cheers,
|
| // m
|




From theller at python.net  Thu Jan 29 09:22:01 2004
From: theller at python.net (Thomas Heller)
Date: Thu, 29 Jan 2004 15:22:01 +0100
Subject: Printing From Python
References: <8089854e.0401290555.501f0695@posting.google.com>
Message-ID: <7jzahm2e.fsf@python.net>

michael at foord.net (Fuzzyman) writes:

> I looked through the manual, I looked on the web and could find very
> little on this subject....
>
> The closest I could find was :
> http://www.faqts.com/knowledge_base/view.phtml/aid/4549.
>
> Saying that printing (to a printer :-) wasn't easy (at least on
> windows - let alone *cross* platform) - and that was dated 2000.
>
> Oh and - http://mail.python.org/pipermail/python-list/2002-September/121462.html
> from 2002 giving two different methods for Unix and Windows... the
> windows one doesn't work across our network........

Although I am connected to a network printer, I have no problems opening
lpt1:, write some data to it, and the printer prints it:

C:\>net use
Neue Verbindungen werden gespeichert.


Status       Lokal     Remote                    Netzwerk

-------------------------------------------------------------------------------
[...]
Getrennt     LPT1      \\server\lexmarkps        Microsoft Windows-Netzwerk
Der Befehl wurde erfolgreich ausgef?hrt.


C:\>copy con: lpt1:
hello, world
^Z
        1 Datei(en) kopiert.

C:\>


Another thing that comes to mind is something like 'notepad /p x.txt'.

If you want to print other things than simple text files, it gets more
complicated IMO.

Thomas


From marco at bubke.de  Wed Jan 21 13:13:01 2004
From: marco at bubke.de (Marco Bubke)
Date: Wed, 21 Jan 2004 19:13:01 +0100
Subject: Numarray und NA_NewAll
References: <bum333$juh$1@graf.cs.uni-magdeburg.de>
Message-ID: <bumffd$7df$1@graf.cs.uni-magdeburg.de>

Sorry, little stupid bug is in the it. It must be tUInt8.



From richardshea at fastmail.fm  Tue Jan 13 06:15:48 2004
From: richardshea at fastmail.fm (Richard Shea)
Date: 13 Jan 2004 03:15:48 -0800
Subject: Accessing "GIS (ESRI shape file)" files from Python ?
References: <282f826a.0401121907.498543e6@posting.google.com>
Message-ID: <282f826a.0401130315.5b92b2aa@posting.google.com>

That's great - thanks very much just downloading Thuban now.

thanks again.

richard shea.


From db3l at fitlinxx.com  Thu Jan 22 13:51:47 2004
From: db3l at fitlinxx.com (David Bolen)
Date: 22 Jan 2004 13:51:47 -0500
Subject: Looking for advice: supporting multiple embedded interpreters
References: <mailman.646.1074782778.12720.python-list@python.org>
Message-ID: <uad4fke9o.fsf@fitlinxx.com>

Paul Miller <paul at fxtech.com> writes:

> What I am wondering is if there a reliable method in 2.3 that does
> what I need?
> 
> It has recently come to my attention that Lutz Paelike is in exactly
> the same situation I am in, so I don't think this is a fringe concept.

I can't address why it doesn't work in 2.3, but just a question - have
you thought of not using independent interpreter states, but just
tracking the contents of sys.modules and clearing out any new modules
at reload time?  That would force even nested imports to be reloaded.
You can find an example of doing this in the unittestgui.py module,
for example, that is part of PyUnit, as it uses this approach to
ensure that all modules under test are reloaded at the start of
execution of a test suite.

I expect that you might be able to get even fancier by installing a
custom import hook, but just flushing sys.modules is pretty simple and
should work in any Python release.

Of course, it won't deal with stray references you may still have
around to the old module or module objects, but since the new
interpreter approach definitely can't be exhibiting that behavior
anyway, I expect you aren't using any older objects after such a
reload.

-- David


From poyol at hotmail.com  Mon Jan 19 09:15:50 2004
From: poyol at hotmail.com (OPQ)
Date: 19 Jan 2004 06:15:50 -0800
Subject: py2exe 0.5.0 (finally) released
References: <y8s7aeps.fsf@python.net>
Message-ID: <a334c30e.0401190615.67ea1ad3@posting.google.com>

Thomas Heller <theller at python.net> wrote in message news:<y8s7aeps.fsf at python.net>...
> **py2exe 0.5.0** (finally) released

> py2exe is a Python distutils extension which converts python scripts
> into executable windows programs, able to run without requiring a
> python installation.
> 

> Enjoy,
> 
> Thomas



Great !
Works flawlessly for me. 
The ptyhoncom support is much better for me.
Sometimes, in the past, py2exe would forget to include (because of me)
some pythoncom.dll.
Not anymore.


But anyway, there is a little annoying point: in the past (0.4.x),
while compiling, py2exe would turn all necessary files to pyc or pyo
in-place
And then, after 1 compilation step, it wouldn't do it anymore, but
just for the file which have changed.

Now, since it put all the file in the zip archive, It won't generate
.pyo files in-place, but only in the archive.
And thus, each time I compile py application, I see that py2exe
bye-compile stuff that didn't change, but do not exists in .pyo.



I may be wrong in my analyse, but that's how I see it.

Other stuff: for the same EXE, I have (totally arbitrary number) 
8.6 Mb of data with py2exe 0.4
11.7 M with 0.5 (zipfile activated) 

Try to explain that ! 


Anyway, great stuff, great samples to


---OPQ


From zunbeltz at wm.lc.ehu.es.XXX  Mon Jan 26 04:20:06 2004
From: zunbeltz at wm.lc.ehu.es.XXX (Zunbeltz Izaola)
Date: 26 Jan 2004 10:20:06 +0100
Subject: unittest
Message-ID: <cthu12j9id5.fsf@lcpxdf.wm.lc.ehu.es>

Hi,

I am using unittest for the first time. I have read chapter 7 of dive into
pyhton (Unit Test). I have the following code 

from spacegroup import *
import pygroups.misc.matrix as matrix
import unittest

class KnowValues(unittest.TestCase):

    KnownRotationMatrices = [
        ((Rotational3Part([[-1,0,0],[0,1,0],[0,0,-1]])),
        (1, -1, 2, matrix.vector([0,1,0])))
        ]

    def TestRotationalPartdeterminant(self):
        """ RotationalPart. determinant with known values."""
        for i in  self.KnownRotationMatrices:
            det = i[0].determinant()
            self.assertEqual(det,i[1][0])


if __name__ == "__main__":
   unittest.main()

but when i run this scrip i get the following output


----------------------------------------------------------------------
Ran 0 tests in 0.000s

OK

Why the test didn't run? any idea?

TIA 

Zunbeltz


From max at alcyone.com  Mon Jan 12 14:45:01 2004
From: max at alcyone.com (Erik Max Francis)
Date: Mon, 12 Jan 2004 11:45:01 -0800
Subject: building strings with variable input
References: <pduMb.6321$g4.137247@news2.nokia.com>
	<400273B8.E991F41D@alcyone.com>
	<qnkd69pp4ph.fsf@arbutus.physics.mcmaster.ca>
Message-ID: <4002F93D.298A2394@alcyone.com>

"David M. Cooke" wrote:

> In which case he's probably better off with his original format
> (almost):
> 
> cmd = '"$executable" -start "$startTime" -end "$endTime" -dir \
> "$directory"'
> os.environ['executable'] = 'blah'
> os.environ['startTime'] = '12'
> os.environ['endTime'] = '18'
> os.environ['directory'] = './'
> os.system(cmd)

This doesn't resolve the underlying possibility for mailicious people in
control of the contents of those variables to get it to execute
arbitrary shell code.  (In his case he says it isn't an issue, but
still.)

-- 
 __ Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
/  \ San Jose, CA, USA && 37 20 N 121 53 W && &tSftDotIotE
\__/ It was involuntary. They sank my boat.
    -- John F. Kennedy (on how he became a war hero)


From pln at razzle.Stanford.EDU  Tue Jan  6 00:51:08 2004
From: pln at razzle.Stanford.EDU (Patrick L. Nolan)
Date: Tue, 6 Jan 2004 05:51:08 +0000 (UTC)
Subject: Grab input&output of program on Windows
References: <btd05f$5vg$1@news.Stanford.EDU> <btd4na$nub$1@ousrvr3.oulu.fi>
Message-ID: <btdicc$4vc$1@news.Stanford.EDU>

Tero Pihlajakoski <tepihlaj at nopaju.spamoulu.fi> wrote:
> Patrick L. Nolan <pln at cosmic.stanford.edu> wrote:
>> I'm going nuts trying to port an application from Linux
>> to Windows.  We have a python/Tkinter script which runs
>> a C++ application.  It starts it with popen4 and 
>> communicates through the two pipes.  It reads text output
>> from stdout until a prompt appears, then sends commands
>> through stdin.

> Sorry, if this is basic, but: Did you flush() after write()? Try using
> popen2() (there was something about popen4() on win32...), if possible
> (import popen2, etc.)?

Thanks.  I skimped on the details to avoid scaring off potential
readers.  Yes, I did try flushing the streams.  I'm using
win32pipe.popen4() on windows and popen2.popen4() on linux.
Win32pipe is supposed to be the one that works....

-- 
*   Patrick L. Nolan                                          *
*   W. W. Hansen Experimental Physics Laboratory (HEPL)       * 
*   Stanford University                                       *


From tchur at optushome.com.au  Fri Jan  9 20:47:50 2004
From: tchur at optushome.com.au (Tim Churches)
Date: 10 Jan 2004 12:47:50 +1100
Subject: Databases: Which one's right for me?
In-Reply-To: <4378fa6f.0401091717.1ae63541@posting.google.com>
References: <4378fa6f.0401091717.1ae63541@posting.google.com>
Message-ID: <1073699270.1186.121.camel@emilio>

On Sat, 2004-01-10 at 12:17, Marc wrote:
> Hi all,
> 
> Having never used a database before and immersing myself in reading
> stuff about databases over the last two days I have come to this
> conclusion, I still don't know which one I need. I've been using
> Python for a while, storing things that I'll need later in files. I am
> now looking for a better solution; ergo the need for a database.
> 
> Basically I need a db that will travel with my executable script and
> faithfully store and edit the data needed in that script. People using
> this script will need to be stand alone users. Having a client/server
> arrangement is not possible over a network.

You know about pickling, don't you, specifically cPickle. If not,
investigate that first.

> Also, installing some type of db engine outside of Python is also not
> possible. This rules out installing such readily available databases
> as mySQL or any other type of db that must have a separate install.
> Everything must be contained within the Python executable package.
> However, all of the users WILL have MS Access already installed. So
> that is a good possibility, and I have already played around with DAO
> and run a couple of scripts with it.
...
> So from reading I've narrowed it down to two possibilities - MS Access
> with DAO and Gadfly. What I can't get from reading is experience or
> someone who has done this type of thing before and already knows which
> one will work best based on what I need to do. Or, if there exists
> another solution other than the two I mentioned, please throw that out
> there because it's almost impossible to completely examine every
> possibility out there. All suggestions are helpful.

Look at the support for the various flavours of the BSD database which
are part of the standard Python library, and also the shelve interface
to those databases.

Also look at PySQLite (see http://pysqlite.sourceforge.net/ ) and
MetaKit (http://www.equi4.com/metakit/python.html).

-- 

Tim C

PGP/GnuPG Key 1024D/EAF993D0 available from keyservers everywhere
or at http://members.optushome.com.au/tchur/pubkey.asc
Key fingerprint = 8C22 BF76 33BA B3B5 1D5B  EB37 7891 46A9 EAF9 93D0


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From tim.one at comcast.net  Thu Jan  1 00:07:47 2004
From: tim.one at comcast.net (Tim Peters)
Date: Thu, 1 Jan 2004 00:07:47 -0500
Subject: fatal error: GC object already tracked
In-Reply-To: <Pine.GSO.4.44.0312311534430.9747-100000@epic9.Stanford.EDU>
Message-ID: <LNBBLJKPBEHFEDALKOLCMENLIBAB.tim.one@comcast.net>

[Vikram]
> i have a program which uses multiple threads and downloads pages using
> pycurl and processes these pages among other things. the program works
> fine with python 2.2 and pycurl 7.10.8 ;
>
> with python 2.3 i get two kinds of errors maybe related? a)  python
> dumps core and prints out "Fatal Python error: GC object already
> tracked"

That error check is new in 2.3, but a program trying to track a GC object
that's already been tracked has always been breaking the rules.  Because
that's a very low-level problem with C code, you may or may not see an
immediate problem as a consequence of breaking the rules.  A segfault is one
possible bad consequece; arbitrary memory corruption is another; no obvious
problem at all is a third.  Luck of the draw.

I'm not familiar with pycurl, but if any of it is written in C, the root
cause  is almost certainly that pycurl is using the Python C API
incorrectly.

> b) the program just waits at update_refs() function inside
> the python GC code path and doesn't append anything to the logs nor
> perform any activity.

update_refs() is a very simple function, and the only way I can see for it
to get stuck is if somebody is mucking with Python objects in another thread
while cyclic gc is running.  The other thread would be in error then, as the
global interpreter lock is always held by the thread running cyclic gc when
cyclic gc is running, and it's strictly forbidden (but, alas, impossible to
*enforce* at the C level) for any thread to do anything with Python objects
when it doesn't hold the GIL.  This symptom is one that's never been
reported before, but is consistent with the theory that pycurl is using the
Python C API incorrectly.

> any idea why or suggestions ?
>
> 			Vikram
>
> ps: the Fatal Python error: GC object already tracked" error seems to
> be an open bug filed by someone else in october 2003.

I figure you mean this:

    http://www.python.org/sf/816476

Since that was also reported against pycurl, nothing else like it has ever
been reported, and there's been no followup from the OP in 3 months, I just
closed that as "presumed 3rd party".  Your best bet is to take it up with
the pycurl folks, since the evidence points at pycurl.




From mday at apple.com  Tue Jan 27 18:31:50 2004
From: mday at apple.com (Mark Day)
Date: Tue, 27 Jan 2004 15:31:50 -0800
Subject: map float string '0.0' puzzle
References: <bv6ovb$c2q$1@boulder.noaa.gov>
Message-ID: <270120041531508319%mday@apple.com>

In article <bv6ovb$c2q$1 at boulder.noaa.gov>, j vickroy
<jim.vickroy at noaa.gov> wrote:

> >>> row = ('0.0', '1.0', None)
> >>> map(lambda setting: setting and float(setting) or None, row)
> [None, 1.0, None]
> >>> map(lambda setting: setting and (setting,float(setting)) or
> (setting,None), row)
> [('0.0', 0.0), ('1.0', 1.0), (None, None)]
> >>>
> 
> Specifically, why is the return value of the first map operation:
> [None, 1.0, None]

Break it down into something simpler so you can see what's going on. 
Let's see what that lambda is evaluating to when setting is '0.0':

>>> '0.0' and float('0.0') or None
>>> print '0.0' and float('0.0') or None
None

That expression evaluates as: ('0.0' and float('0.0')) or None
which means ('0.0' and float('0.0')) must be false.

>>> '0.0' and float('0.0')
0.0

Now you see that the expression reduces to: 0.0 or None

The key is that 0.0 is considered false:
>>> bool(0.0)
False
>>> print 0.0 or None
None

which means the expression reduced to the equivalent of: False or None
and so you get None as the result.

Hope that helps.

-Mark


From ykingma at accessforall.nl  Wed Jan 21 03:19:59 2004
From: ykingma at accessforall.nl (Ype Kingma)
Date: Wed, 21 Jan 2004 09:19:59 +0100
Subject: Weaver/Yarn Pattern in Python
References: <mailman.570.1074666395.12720.python-list@python.org>
Message-ID: <400e362f$0$322$e4fe514c@news.xs4all.nl>

Christian Stork wrote:

> Hello everybody,
> 
> I am using Python to prototype a compression algorithm for tree-shaped
> data, e.g., XML data or abstract syntax trees.  I use a variant of the
> visitor design pattern--called weaver/yarn pattern--in order to
> traverse the tree that is being compressed or decompressed.  I do not
> know of any other interesting application of the weaver/yarn pattern,
> but it seems like a very suitable subject of study for different
> implementation strategies.  Essentially, I am asking for input on my
> design decisions.
> 
> First, let me give you a simple example of the traditional visitor
> pattern.  The following diagram illustrates a depth-first traversal of
> a mini tree by a visitor.  The basic idea is that the tree accepts a
> visitor and helps it to do a kind of type-dispatch based on the kind
> of nodes.
> 
...
> 
> The advantage of this ping-pong between the tree and visitor v is that
> v encapsulates related processing instructions.  Several different
> visitors can be maintained independently of each other and without
> forcing changes to the tree node classes.  The tree nodes only need to
> provide a node.accept(visitor) method.  Type-checking can ensure
> the match between the visitor and the tree data structure.
> 
> Normally, visitors encapsulate different processing passes, which are
> run one after the other, each time traversing the whole tree.  I have
> implemented the compression of trees as several (sub)visitors c1..cN
> even though they could have been implemented as one big visitor.
> Besides the easy recombinability of visitors this has the added
> advantage that I can use the same visitors for compression and
> decompression where this is appropriate.
> 
> But now I have a problem when decompressing.  In order to run one
> visitor after another the first one expects to traverse the whole
> tree.  But this is impossible in case of a decompressor.  It lies in
> the very nature of the application that the tree is being constructed
> while the visitors work on it.  Conceptually the solution is easy.
> The decompression subvisitors d1..dM have to process the partially
> available tree upto the point of traversal where it is available.  At
> each node execution has to iterate over the applicable code of d1..dM
> in the given order.  This necessitates a decomposition of visitors
> into something that we call yarns and these yarns are weaved by one
> visitor, which we call the weaver.  Thus the name "Weaver/Yarn
> Pattern" for this variation of the visitor pattern.
> 
> The following exemplifies my current implementation of the w/y pattern
> for a recursive descent (ie depth-first traversal) visitor.  For each
> (sub)visitor d1..dM the former d<i>.visitX(x) method is divided into
> several y.weaveX_...() methods.  At entry and exit the weaver invokes
> y.weaveX_First() and y.weaveX_Last().  Each descent into a child is
> surrounded by y.weaveX_Before(kidno) and y.weaveX_After(kidno) method
> calls.
> 
...
> 
> By now it should be obvious that the boilerplate for this approach
> becomes quite extensive and it would be desirable to reduce it.  To
> mitigate the problem I did three things:
> 
> - Automatically generate templates for yarn classes.  The actual code
>   can be filled in.  Disadvantage: No convenient way to deal with
>   changes to the tree data structure.
> 
> - The node.accept(weaver) methods are changed to call a "generic"
>   weaver.weave(node) method (instead of weaver.visitX(node)), which
>   hackishly constructs all the calls to the yarns by assembling the
>   method names from the __class__.__name__ and one of "First", "Last",
>   "Before", and "After".
> 
> This solution does pretty much what I want:
> 
> - Writing selected yarn methods allows me to express with little
>   overhead /what/ code to execute /when/ in the weaving process.
> 
> - Once the weaver/yarn interaction machinery is set up correctly, the
>   debugger points me to real code in case of bugs.  This is an
>   advantage over approaches that create classes at runtime, e.g., use
>   of metaclasses or the "new" module.
> 
> OTOH, I'm not perfectly happy with this solution since it's totally
> "hackish".  For example, I have to use a function, hand-written
> specifially for this purpose, in order to "type-check" the
> correspondence of the tree types and the yarns.
> 
...

Have a look at aspect oriented programming:

http://www.ccs.neu.edu/home/lieber/AOP.html

In theory it sounds like a good match for what you need.

I don't know how well Python supports this, perhaps you
can use a metaclass for this, but I'm not sure.


Have fun,
Ype


-- 
email at xs4all.nl


From yshurik at fhb.kiev.ua  Sat Jan 17 05:47:57 2004
From: yshurik at fhb.kiev.ua (yshurik)
Date: Sat, 17 Jan 2004 12:47:57 +0200
Subject: QT usage confusion
References: <40069912$0$251$4d4ebb8e@news.nl.uu.net>
Message-ID: <bub3pd$dl0$1@news.lucky.net>

Guyon Mor?e wrote:

> hmmm, all this time that I am fooling around with python I never took a
> good look at (py)QT.
> I want to have a go at it, after being a bit disapointed about the
> alternatives.
> 
> I have read multiple docs about it and searched this newsgroup I came to
> the conclusion that, as I am a windows user, I have only 2 options:
> 
> - buy a commercial qt license
> - try it out for 30 days (!)
> 
> that sucks ;)

You can try demo version of BlackAdder
which provide demo version of PyQt. If you will need
to create commercial apps, then BlackAdder with PyQt 
costs about $400 (Qt costs more than 1k how i remember)

> 
> am I wrong?
> please tell me I'm wrong.

-- 
Best regards


From okyoon at stanford.edu  Mon Jan 26 16:29:25 2004
From: okyoon at stanford.edu (Ohkyu Yoon)
Date: Mon, 26 Jan 2004 13:29:25 -0800
Subject: Newbie : innerproduct function from Numarray
Message-ID: <bv40rm$ra$1@news.Stanford.EDU>

I have two vectors that have about 2000 elements.
I need to calculate the innerproducts of those vectors 2000 times where
one of them cycles left(ie 1234, then 2341, then 3412, etc)
Basically, I want to calculate A*x, where A is a left-circulant cyclic
matrix,
and x is a vector.

I tried it two ways.
vector1 & vector2 are lists.

1)
from Numarray import innerproduct
output = []
temp = vector1 + vector1    # temp is twice the length of vector1
for i in range(2000):
     output.append(innerproduct(temp[i:(i+2000)],vector2)
2)
output = []
temp = vector1 + vector1
for i in range(2000):
    sum = 0
    for j in range(2000):
        sum += temp[i+j] * vector2[j]
    output.append(sum)

I thought the first method using Numarray should be faster.
But it looks like the second method is faster.
Am I doing anything wrong?
Do you guys know any faster way to do this?

Thank you.




From oliver.schoenborn at utoronto.ca  Fri Jan 16 16:46:25 2004
From: oliver.schoenborn at utoronto.ca (Humpty Dumpty)
Date: Fri, 16 Jan 2004 16:46:25 -0500
Subject: Lazy cascading menu in Tkinter with postcommand
Message-ID: <bu9m3h$t5u$1@nrc-news.nrc.ca>

Hi folks, here's a challenge: I have a dynamically created cascading menu in
Tkinter that can be quite large because it is created from a file. I tried
using lazy creation so only the menu item that is actually selected by the
user gets children menu items created under it, but that fails.

I did this by use of postcommand callback, in which I dynamically add the
children menu items to the parent. However, a print statement in the
postcommand callback shows that:
1) *ALL* cascading menu items in a hierarchy get the postcommand event,
every time the user selects the top menu item
2) all children that have just been added to a cascading menu item in the
postcommand callback will hear that postcommand event

So in the end, the first time the user clicks on the top menu item, the
whole menu hierarchy gets created (though only the top level is displayed of
course).

Anyone know how to get around this? I'm considering bypassing the built-in
cascading menu and creating my own via popup menus and filtering for "on
entry" of the buttons, but there should be a simpler method.

Thanks in advance for any help,
Oliver




From zorlord at zorlord.karoo.co.uk  Mon Jan  5 20:53:12 2004
From: zorlord at zorlord.karoo.co.uk (greg)
Date: Tue, 6 Jan 2004 01:53:12 -0000
Subject: Probles parsing a text file
Message-ID: <LoOdnYV4RNhliWeiSa8jmw@karoo.co.uk>

heres my text file(well the first two lines of it)

#########################################
#            Default BMUS server CFG file                   #

this file is written with the following code

    fi = open('bmus.cfg', 'w')
    print 'file opened'
    cfg = []
    cfg.append('#########################################\n')
    cfg.append('#            Default BMUS server CFG file
#\n')
    fi.writelines(cfg)


i heres the script that im using to parse the file

fi = open('bmus.cfg', 'r')

if fi:
    print('Reading Server CFG file')
    ll = fi.readlines()
    for line in ll:
        print(str(line))
        if line[:2] == '#' or len(line) == 0:
            pass
        else:
            eval(line)
            print("line executed")
else:
    print('Could not read Server CFG')

heres the error im getting

D:\DEMOFI~1\blender\pong1>bmus-001-thread-server.py
Reading Server CFG file
#########################################

Traceback (most recent call last):
  File "D:\DEMOFI~1\blender\pong1\bmus-001-thread-server.py", line 73, in ?
    eval(line)
  File "<string>", line 1
    #########################################

^
SyntaxError: unexpected EOF while parsing

im using one py script to ouput the txt file using \n as the end of line to
avvoide
any possible windows problems (with it using \r\n).

and then the fiel is erroring here when im reading it back into my program..

many thnas for your help

Greg Brant




From fumanchu at amor.org  Wed Jan 21 19:24:49 2004
From: fumanchu at amor.org (Robert Brewer)
Date: Wed, 21 Jan 2004 16:24:49 -0800
Subject: PyTime Object and Application Crashing
Message-ID: <DE1CF2B4FEC4A342BF62B6B2B334601E561C52@opus.amorhq.net>

Mark Hammond wrote:
> Robert Brewer wrote:
> > > 12/30/1899 the application crashes.
> > 
> > AFAICT all dates on or before that date will crash.
> 
> That is a new one for me :)  I have fixed the crash here, but calling 
> Format() (which print does under the covers) will still fail 
> for those dates - but with a ValueError.

Yes, I should have been more explicit--I always got the crash on calling
Format().

Since you have more intimate knowledge of this arena than anyone else,
do you have a better solution than my casting to and from float?


Robert Brewer
MIS
Amor Ministries
fumanchu at amor.org



From gandalf at geochemsource.com  Thu Jan 29 16:41:32 2004
From: gandalf at geochemsource.com (Gandalf)
Date: Thu, 29 Jan 2004 22:41:32 +0100
Subject: Masked bitmap from bitmap
Message-ID: <40197E0C.3000407@geochemsource.com>

Hi Gurus! Here is a problem with wxPython. I would like to load bitmaps 
and create a mask
for them at once. Here is my idea: the mask colour for the bitmap should 
be the colour of
the pixel in the top left  corner. (The same way Delphi does with 
TImageList.) E.g. the
bitmap should be transparent everywhere with the same colour. I read the 
documentation,
and I could not find an easy way to do this. Here is what I have tried:

1. Create a wxIcon directly (which is a wxBitmap, I only need a masked 
wxBitmap.)

This does not suit for me, since I need to load bitmaps on all 
platforms. wxIcon cannot handle the BMP format on all platforms.
This is from the docs (about the type parameter of wx.Icon):

 >wxBITMAP_TYPE_ICO  Load a Windows icon file.
 >wxBITMAP_TYPE_ICO_RESOURCE  Load a Windows icon from the resource 
database.
 >wxBITMAP_TYPE_GIF  Load a GIF bitmap file.
 >wxBITMAP_TYPE_XBM  Load an X bitmap file.
 >wxBITMAP_TYPE_XPM  Load an XPM bitmap file.
 >
 >The validity of these flags depends on the platform and wxWindows 
configuration. If all possible wxWindows settings are used, the Windows 
platform supports ICO file, ICO resource, XPM data, and XPM file. Under 
wxGTK, the available formats are BMP file, XPM data, XPM file, and PNG 
file. Under wxMotif, the available formats are XBM data, XBM file, XPM 
data, XPM file.

wxIcon cannot handle BMP on the Windows platform so I cannot use wxIcon.

2. Load wxBitmap and use wxIcon.CopyFromBitmap.

Is not okay. This is from the docs:

 >Copies bmp bitmap to this icon. Under MS Windows the bitmap must have 
mask colour set.

Back to the stove: once I have a bitmap with a mask, I do not really 
need a wxIcon. :-( For most platforms, this solution would be fine but 
not on M$ Windows.

3. Load a bitmap and specify the mask by hand. That would be great. 
Unfortunately, I cannot get the colour of the top left pixel. There is 
no such method, or I could not find it :-/ Even if there were one, I 
would had created the mask by hand, in Python. I cannot set pixels' 
colours (no method for that). And of course, this would be very slow.

4. Load the bitmap in PIL, create the mask by hand, save the mask into a 
different file/object, load the bitmap and the saved mask into different 
objects, finally combine them. Oh yeah, I can imagine this would work. 
But it is too difficult and it would be very very very slow. There must 
be a better way.

Please note that I do not want to use C/SWIG or any external tool. I 
would like to use pure Python with wxPython if possible. Can somebody 
help me?
A code fragment or a link would be great.

Thanks in advance,

  Gandalf


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From swalters_usenet at yahoo.com  Tue Jan 13 21:06:46 2004
From: swalters_usenet at yahoo.com (Samuel Walters)
Date: Wed, 14 Jan 2004 02:06:46 GMT
Subject: Does anyone else not find the fun in programming...?
References: <d232c5e.0401130823.27fd26ff@posting.google.com>
Message-ID: <pan.2004.01.14.02.05.21.70832@yahoo.com>

|Thus Spake Chris Lyon On the now historical date of Tue, 13 Jan 2004
08:23:46 -0800|

> I find python very effective as a language and can generally project
> most of my hazy thoughts into it. But FUN !!! This is work dammit, I
> have now ground my teeth down from the number of times I read that
> programming is fun. Football (association) is fun, walking along canals
> is fun, Arguing about quite how useless the British Government is fun
> but programming  ?

Do you grind your teeth whenever you hear someone say... Oh, perhaps
"Knitting is fun?"  I don't like knitting, but my grandmother finds
knitting fun, and it causes me no anxiety that she or anyone else gets
enjoyment that way.

Why is it, then, that me saying "programming is fun" upsets you?
Is it jealousy that causes you to grind your teeth, or something else?

You see, I get a certain feeling of reward when I solve a problem.  This
might be a particularly tough math problem, or a programming problem, or
most any other kind of "self challenge."  First it's a feeling of intrigue
and fascination, then a feeling of triumph.

I'll try to draw some more mundane situations that gave me the same
feeling.

With perhaps only a difference in adrenaline level, I get the same kick
from programming that I got when I sacked a quarterback or scored a
touchdown playing football (american) during high school.

I get the same kick as when I first benchpressed my own weight. And as
when I completed my first 10k run, and again when I won my first 10k run.

There's something to point out about the past few examples.  I didn't
necessarily enjoy all the weightlifting and running and training for
football, but in the end, it was well worth it to me.

During the process of solving a problem, I get the same feeling as I get
while chatting up an interesting girl in a bar.  (No, the playful
fascination part, not the sexual part.)

I also get the same feeling as watching a good movie.  There's some level
of intrigue involved.

The list goes on, but maybe now you can see what I get out of it.

No doubt there are things that give you the same feeling.  Too bad you
haven't yet found a line of work that incorporates them.

> Do I need help ?

Perhaps from a career counselor.

I have a philosophy about time, money, happiness and freedom.  There are
those who say that time is money, and I disagree with them.  If I lose
money, I can get it back.  If I lose time, it's gone forever.  We've all
heard the cliche "Money can't buy happiness," which is only a half-truth.
Money doesn't buy happiness, but it can buy the freedom to pursue
happiness.  So, when I consider a job, I ask myself "Will this job result
in a net gain of happiness and freedom for me?"  I am, after all, selling
pieces of my very own existence (time) for money.  Thus, I try hard to
find jobs that I will enjoy, even if they don't pay as much, because I'll
be spending an awful lot of my existence working.

HTH

Sam Walters.

-- 
Never forget the halloween documents.
http://www.opensource.org/halloween/
""" Where will Microsoft try to drag you today?
    Do you really want to go there?"""



From avera at coes.org.pe  Thu Jan 29 10:23:37 2004
From: avera at coes.org.pe (Alberto Vera)
Date: Thu, 29 Jan 2004 10:23:37 -0500
Subject: sending mail cc, bcc
Message-ID: <000f01c3e67b$de344800$1603a8c0@pc22>

Hello:

I have a library called smtplib that send email
I use these lines to use it:  (from -->to)
------------------------------------
server = smtplib.SMTP(server)
server.sendmail(fromaddr, toaddrs, message)
------------------------------------

But I'd like to include some mails CC ,BCC.
(from -->to)
(       |-->cc )
(       |-->bcc)

Does anyone have a library to make it? (mail: from, to, cc, bcc)

Regards
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From miki.tebeka at zoran.com  Thu Jan  1 02:56:09 2004
From: miki.tebeka at zoran.com (Miki Tebeka)
Date: 31 Dec 2003 23:56:09 -0800
Subject: Graph in wxPython
References: <bt04a4$2e3$1@news.Stanford.EDU>
Message-ID: <4f0a9fdb.0312312356.75a4fe15@posting.google.com>

Hello "Oh Kyu Yoon",

> Does anyone know how to implement plots from scipy, chaco, etc
> into wxPython widget?
Save them as an image and use wxImage?

HTH.
Miki


From michael at foord.net  Thu Jan 29 08:55:09 2004
From: michael at foord.net (Fuzzyman)
Date: 29 Jan 2004 05:55:09 -0800
Subject: Printing From Python
Message-ID: <8089854e.0401290555.501f0695@posting.google.com>

I looked through the manual, I looked on the web and could find very
little on this subject....

The closest I could find was :
http://www.faqts.com/knowledge_base/view.phtml/aid/4549.

Saying that printing (to a printer :-) wasn't easy (at least on
windows - let alone *cross* platform) - and that was dated 2000.

Oh and - http://mail.python.org/pipermail/python-list/2002-September/121462.html
from 2002 giving two different methods for Unix and Windows... the
windows one doesn't work across our network........

Any 'print' modules out there - that implement cross platform printing
interfaces ?

Fuzzy

--

http://www.Voidspace.org.uk The Place where headspace meets
cyberspace. Online resource site - covering science, technology,
computing, cyberpunk, psychology, spirituality, fiction and more.

--- 

http://www.voidspace.org.uk/atlantibots/pythonutils.html
Pythonutils - home of dateutils, ConfigObj, StandOut etc.....


From martin at v.loewis.de  Sat Jan  3 07:11:48 2004
From: martin at v.loewis.de (Martin v. Loewis)
Date: Sat, 03 Jan 2004 13:11:48 +0100
Subject: Filename type (Was: Re: finding file size)
In-Reply-To: <mailman.45.1073125105.12720.python-list@python.org>
References: <4V4Jb.12709$Vl6.2811218@news20.bellglobal.com>	<bt3l9i$pog$07$3@news.t-online.com>
	<mailman.45.1073125105.12720.python-list@python.org>
Message-ID: <bt6bi3$25j$06$2@news.t-online.com>

Gerrit Holl wrote:
> Any comments?

It should be possible to implement that type without modifying
Python proper. It might make a good recipe for the cookbook.

Any volunteers?

Regards,
Martin



From cbh at newenglandhomes.net  Fri Jan 23 13:17:12 2004
From: cbh at newenglandhomes.net (CB Hamlyn)
Date: Fri, 23 Jan 2004 13:17:12 -0500
Subject: File Install Program Using Python?
References: <1012ij4idech2d6@corp.supernews.com>
	<mailman.700.1074876093.12720.python-list@python.org>
Message-ID: <1012p0i3foqh9e0@corp.supernews.com>

Thank you so much.  I'd like to learn it and you've all given me a great
head start!

"Dave Brueck" <dave at pythonapocrypha.com> wrote in message
news:mailman.700.1074876093.12720.python-list at python.org...
> CB Hamlyn wrote:
> > Hello, I'm currently working on a Modification for the PC game
Battlefield
> > 1942.  I'm a pretty good VBA Programmer with some Foxpro under belt as
well.
> > After reading a ton of stuff on-line I'm simply floored by everything
Python
> > has to offer.
> >
> > Anyway, I want to create an installation program that takes a folder and
all
> > it's sub-folders and copies them from a compressed form into the proper
> > directory.  Basically a simplified version InstallSheild or whatever.
> >
> > I assume Python is capable of such a feat and I'm wondering if anyone
can
> > spin me around, point me in the right direction and shove me toward my
goal.
>
> It's definitely possible, but are you more interested in doing it for your
own
> educational purposes or for getting the job done? If it's the latter then
free
> installers like InnoSetup and the WinAmp installer will save you a lot of
time
> since they already work well.
>
> If you just want to do this to learn more, then look into the ZipFile
class in
> the zipfile module for starters. You can add a lightweight GUI using Mark
> Hammond's win32 extensions or Venster, and finally convert it into an
> executable with py2exe or one of the other packagers out there.
>
> -Dave
>
>




From francisgavila at yahoo.com  Wed Jan  7 09:10:07 2004
From: francisgavila at yahoo.com (Francis Avila)
Date: Wed, 7 Jan 2004 09:10:07 -0500
Subject: Code Objects / Variable Names
References: <f8dfa927.0401070051.39cded0c@posting.google.com>
Message-ID: <vvo4rodn3q1c92@corp.supernews.com>

F. Schaefer wrote in message ...
>PROBLEM:
>
>  How can you know what variables are involved in a code object.
>
>  It is not possible to execute the code object simply into a
>  dictionary and then watch the defined variables. This is
>  because these code objects only contain conditions, that
>  read out variables.

This seems a strange requirement.  Perhaps you could elaborate on what
you're doing and we could suggest alternative approaches?  One *rarely*
needs to pass around raw code objects in Python, and both producing and
executing them is considerably slower than just about any other construct
you could use (not that it matters much).

>EXAMPLE:
>
>  For the following (compiled) condition
>
>          (door == "ajar"   and   alternator == "off") || time > 25
>
>  I need to extract, that the variables 'door', 'alternator' and 'time'
>  are involved.


>>> cobj = compile('(door == "ajar"   and   alternator == "off") or time >
25', '<stdin>', 'exec')
>>> dir(cobj)
['__class__', '__cmp__', '__delattr__', '__doc__', '__getattribute__',
'__hash__', '__init__', '__new__', '__reduce__', '__reduce_ex__',
'__repr__', '__setattr__', '__str__', 'co_argcount', 'co_cellvars',
'co_code', 'co_consts', 'co_filename', 'co_firstlineno', 'co_flags',
'co_freevars', 'co_lnotab', 'co_name', 'co_names', 'co_nlocals',
'co_stacksize', 'co_varnames']
>>> cobj.co_names
('door', 'alternator', 'time')

See "Code objects" under "Internal Types" in section 3.2, "Standard Type
Hierarchy," of the Python Language Reference Manual.

>>> import dis #just for fun.
>>> dis.disco(cobj)
  1           0 LOAD_NAME                0 (door)
              3 LOAD_CONST               0 ('ajar')
              6 COMPARE_OP               2 (==)
              9 JUMP_IF_FALSE           10 (to 22)
             12 POP_TOP
             13 LOAD_NAME                1 (alternator)
             16 LOAD_CONST               1 ('off')
             19 COMPARE_OP               2 (==)
        >>   22 JUMP_IF_TRUE            10 (to 35)
             25 POP_TOP
             26 LOAD_NAME                2 (time)
             29 LOAD_CONST               2 (25)
             32 COMPARE_OP               4 (>)
        >>   35 POP_TOP
             36 LOAD_CONST               3 (None)
             39 RETURN_VALUE

--
Francis Avila



From jdhunter at ace.bsd.uchicago.edu  Sat Jan  3 01:33:03 2004
From: jdhunter at ace.bsd.uchicago.edu (John Hunter)
Date: Sat, 03 Jan 2004 00:33:03 -0600
Subject: Text-to-HTML processing program
In-Reply-To: <slrnbvcm32.122.philh@cabalamat.cabalamat.org>
	(philh@invalid.email.address's
	message of "Sat, 3 Jan 2004 05:51:33 +0000")
References: <slrnbvcm32.122.philh@cabalamat.cabalamat.org>
Message-ID: <m27k09h78g.fsf@mother.paradise.lost>

>>>>> "phil" == phil hunt <philh at invalid.email.address> writes:

    phil> Does anyone know of a text-to-HTML processing program,
    phil> ideally written in Python because I'll probably be wanting
    phil> to make small modifications to it, which is simple and
    phil> straightforward to use and which uses a simple markup
    phil> language (something like Wikipedia markup would be ideal)?

Structured text is one of the simplest markups around (and
sufficiently powerful to make nice looking hardcopy) and is well
supported in python

  http://www.zope.org/Members/millejoh/structuredText

  http://docutils.sourceforge.net/docs/rst/quickstart.html

Beyond that, search google groups for

  structured text group:*python*

Here's a link to a post from me about the conversion of one of the old
diehards in our hospital to structured text:
http://mail.zope.org/pipermail/zope/2002-May/115243.html.

JDH



From chalaouxfr at wanadoo.fr  Mon Jan 26 15:54:08 2004
From: chalaouxfr at wanadoo.fr (chalaouxfr)
Date: Mon, 26 Jan 2004 21:54:08 +0100
Subject: Mirroring behind a Firewall
Message-ID: <bv3upk$af9$1@news-reader3.wanadoo.fr>

Hi All,

I would to mirror databases, with Python if possible. WGet is broken since
version 1.7 if you want to mirror behind a Firewall !!

What is the better solution to realize this mirrors ?
Have you simple script examples or url of even commercial programs ?

Bye, FR.




From ramen at lackingtalent.com  Fri Jan  9 21:39:12 2004
From: ramen at lackingtalent.com (Dave Benjamin)
Date: Sat, 10 Jan 2004 02:39:12 -0000
Subject: Python and Jython are kinda different
References: <slrnbvsi8v.78r.ramen@lackingtalent.com> <87wu81jjg2.fsf@pobox.com>
	<slrnbvtlos.h2e.ramen@lackingtalent.com> <8765fkrig3.fsf@pobox.com>
	<slrnbvudpe.1qc.ramen@lackingtalent.com>
	<mailman.257.1073699457.12720.python-list@python.org>
Message-ID: <slrnbvupuo.648.ramen@lackingtalent.com>

In article <mailman.257.1073699457.12720.python-list at python.org>, Jp Calderone wrote:
>   All generators can be re-written with classes using the iterator protocol. 
> Here's a simple example:

Thanks for the nice example. Unfortunately:

Jython 2.1 on java1.4.2_01 (JIT: null)
Type "copyright", "credits" or "license" for more information.
>>> execfile('your-nice-example.py')
>>> for j in FooGen(): print j
...
Traceback (innermost last):
  File "<console>", line 1, in ?
AttributeError: __getitem__

Bring back any memories of the days before generators? ;)

>>  - properties
> 
>   This is getting closer, I think.  More generator, descriptors are pretty
> honkin' fundamental these days.  On the other hand, most behavior
> acheivable with properties can be achieved with __g/setattr__, albeit it
> quite as conveniently.

Yes, but from my experience the property() builtin is so much more
convenient than __get/setattr__ that I am much more likely to use properties
in CPython. With Jython, I have to overcome my laziness, since it means
writing a fair bit of boilerplate. (example follows)

>>  - getattr/getitem behavior (which is even different from CPython 2.1)
> 
>   I guess I haven't used Jython enough to know what's going on here.

Here's an example. I sometimes find it useful to create dictionaries that
allow either attribute or item access, a la JavaScript/ActionScript. In
CPython, I can use the (comment to a) recipe from ASPN:

class attrdict(dict):
    def __getattr__(self, name):
        return self[name]
            
    def __setattr__(self, name, value):
        self[name] = value
                        
(http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52313)

This seems like it would be a very simple port to Jython, right? It's
actually a bit hairy. In order to get it to work, I had to do the following:

class attrdict(UserDict):
    "Dictionary that allows keys to be used as object attributes."
    
    def __init__(self, dict=None, **kwds):
        """attrdict() constructor (behaves like Python 2.3's dict()).
        Optionally takes a source dictionary or keyword arguments."""

        if hasattr(dict, 'items'):
            UserDict.__init__(self, dict)
        else:
            UserDict.__init__(self)
                                        
            if dict is not None:
                for key, value in dict:
                    self[key] = value
                    
        if kwds:
            self.update(kwds)
                                        
    def __getattr__(self, name):
        if self.__dict__.has_key(name):
            raise AttributeError, name
        elif name == '__members__':
            return self.keys()
        elif name.startswith('__') and name.endswith('__'):
            raise AttributeError, name
        else:
            return self[name]
                                
    def __setattr__(self, name, value):
        if name == 'data':
            self.__dict__[name] = value
        else:
            self[name] = value
                    
    def __delattr__(self, name):
        del self[name]

Whew! Now we're rolling with any version of CPython or Jython 2.1 and up. I
wish I could explain to you how much I had to screw with this to get it to
work. It turns out that the constructor for UserDict tries to create an
attribute called "data", which calls my custom __setattr__, and it gets
stuck in an infinite loop. Many combinations and stack exceptions later, I
finally got what used to be a five-line class working in Jython.

Now, I hope you understand why I'm more privy to properties in CPython. =)

>>  - type factories being classes
> 
>   This seems pretty important to me, probably the most important on the
> list.  Metaclasses existed before 2.2, but not without writing an extension
> module.

Hmmm... well, metaclasses would be nice, too, but mostly I was thinking of
whether you subclass "dict" or "UserDict" or "types.DictType", and whether
or not things like "str.join" are available. The former, as you can see, can
make a big difference in how you code things. The latter isn't so significant.

>>  - dictionary support for "in" keyword
> 
>   This seems pretty trivial to me. It's just a transformation of
> dict.has_key().

Yep, and there were many such transformations I had to hunt down and fix by
hand when trying to port the "sets" module. A pretty small module, too. It
was error-prone, and I actually missed a serious performance error when I
posted the patch to c.l.p. If anyone is interested, I can post a better
patch, or just send you the file (contact me by email - r!a at m#e%n AT
r^a at m#e&n!f at e&s#t PUNTO com - remove the line noise of course).

>> > I believe GvR said that PyPy might (might!) become a sort of
>> > executable standard for Python in the future, though.
>> 
>> I think that's an impressive idea, but it almost seems like the resources
>> spent in keeping PyPy and CPython in parallel could be better spent keeping
>> Jython and CPython in parallel, seeing as nobody is calling PyPy "Python"
>> currently.
> 
>   Can't say I agree here, probably because I don't much care about Java ;)
> I think PyPy has a lot more bang for the buck for your average Python
> programmer.  Jython might be nice to bring in some of the Java people, or
> make some of that Java work easier when you absolutely have to use it, but
> for your average Python application, it hardly enters into the picture. 
> PyPy, on the other hand opens up a lot of possibilities for future
> improvements to the language (because it is easier to prototype new features
> in Python than in C) as well as improvements to existing features.

Well, I have to admit I'm a bit biased. I work in a Java team, and I've been
trying to incorporate Python into the existing infrastructure for the past
year or so. So, personally, I'm not the world's biggest Java fan, and I find
PyPy much more interesting, but Jython has more immediate usefulness.
However, I do find myself doing a lot of extra work to keep my code portable
between Jython and CPython, since it facilitates reuse.

I agree that PyPy presents new possibilities for language experimentation,
and being a total language nerd myself, I'm all for it. =)

However, I just want to make the point that Jython is becoming less and less
"Python" as the evolution of CPython begins to affect the actual style in
which Python code is written. And this makes the popular claim, that Python
is the language, and CPython and Jython are two implementations, a bit
misleading.

But it's a lot easier to complain than to contribute. That I'll readily
admit. =)

Thanks,
Dave

-- 
.:[ dave benjamin (ramenboy) -:- www.ramenfest.com -:- www.3dex.com ]:.
: d r i n k i n g   l i f e   o u t   o f   t h e   c o n t a i n e r :


From gandalf at geochemsource.com  Mon Jan 19 11:52:08 2004
From: gandalf at geochemsource.com (Gandalf)
Date: Mon, 19 Jan 2004 17:52:08 +0100
Subject: secure unpickle?
References: <bufkot$96vl$1@netnews.upenn.edu>	<mailman.497.1074496021.12720.python-list@python.org>
	<871xpwxe5g.fsf@pobox.com>
Message-ID: <400C0B38.1080703@geochemsource.com>



John J. Lee wrote:

>Gandalf <gandalf at geochemsource.com> writes:
>[...]
>  
>
>>I'm using this module (based on the documentation you mentioned):
>>    
>>
>[...snip...]
>
>What does this have to do with the question?  He was worried about
>security of pickle, not asking how to call dumps() and loads().
>  
>
Well, in that case, get my humble apologies.
-------------- next part --------------
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From alanmk at hotmail.com  Fri Jan 23 10:30:35 2004
From: alanmk at hotmail.com (Alan Kennedy)
Date: Fri, 23 Jan 2004 15:30:35 +0000
Subject: cgi concurrency approaches?
References: <7x7jzjgso7.fsf@ruckus.brouhaha.com>
	<66s11056aptit3vd2inv3p3r07v95k52ha@4ax.com>
Message-ID: <40113E1B.9D27A13@hotmail.com>

[replying to someone else's reply because I missed the original]

[Paul Rubin]
> I'm wondering if folks here have favorite lightweight ways of dealing
> with concurrency in cgi's, 
[snip]
> but of course there's the obvious race
> condition if two people hit the
> cgi at the same time.
> 
> Fancier solutions include running an transactional database in another
> process and connecting to it, setting up a daemon that remembers the
> counter value in memory and serializes access through a socket that
> the cgi opens, using a file-system specific hack like linking to
> counter file to lock it, having a timeout/retry if the counter is
> locked, with a possible hangup if a lock file gets left around by
> accident, etc.  Each is a big pain in the neck.
> Anyone have some simpler approaches?

I don't know about a platform independent solution, but if you were
willing to limit yourself to certain varieties of Unix, e.g. Linux, it
would probably be relatively easy to implement a persistent counter
using something like System V message queues, or shared memory +
semaphores. This obviously will work only on systems which support
System V IPC.

Here is a brief page about System V IPC

http://www.science.unitn.it/~fiorella/guidelinux/tlk/node56.html

And here's a module, which I've never used, which purports to provide
a python interface to System V IPC facilities, if available.

http://www.theory.org/~mac4/software/

Given the above facilities, there are two ways I would approach the
problem of a persistent counter.

1. Use a dedicated Queue, and hold the counter value inside a single
message which "lives" on that queue. Those incrementing the counter
read the single message from the queue, increment it and put it back
on the queue. Any processes awaiting access to the "counter message"
would then do a blocking read on the queue. Since all puts and gets of
messages are atomic, you are guaranteed only atomic updates to your
counter. However, you could lock your system up if one of your
accessing CGI processes did not put the counter back again! You can
use timeouts as well, if my memory serves (it's been a long time since
I used System V IPC). You can also get fancy, with priorities, etc.

2. Store the value in pre-created shared memory partition, protected
by a semaphore. Since there are shared memory python modules for
several platforms, you might have a better chance with this approach
on non-unix platforms.

The Python Object Sharing (POSH) module might provide wrappers to some
useful functionality, although the module itself might be a little
heavyweight for providing a simple persistent counter.

http://poshmodule.sourceforge.net/posh/html/posh.html

HTH,

-- 
alan kennedy
------------------------------------------------------
check http headers here: http://xhaus.com/headers
email alan:              http://xhaus.com/contact/alan


From michael at foord.net  Tue Jan  6 07:28:08 2004
From: michael at foord.net (Fuzzyman)
Date: 6 Jan 2004 04:28:08 -0800
Subject: IDLE not working under windows.....
Message-ID: <8089854e.0401060428.5a4c165d@posting.google.com>

At least I've been advised by the 'officials' (in response to my bug
report at sourceforge) to only start IDLE with the '-n' argument
because sub-processes 'don't work' on windows.

In fact the problem is that IDLE currently only uses a single socket
and so hangs if you try to open a second version of the shell.....
Which means so long as I rememebr to only open one shell it works
fine...... So I have two file associations for IDLE now......

The trouble is that opening without a subprocess means that if you
edit any modules you have to close IDLE and reload the main program to
test changes in the module... which is mightily a pain.....

So IDLE on windoze is very much a work in progress...............

Fuzzy


From me at here.there.com  Tue Jan 13 15:59:04 2004
From: me at here.there.com (Peter Ashford)
Date: Wed, 14 Jan 2004 09:59:04 +1300
Subject: ProtoCiv: porting Freeciv to Python CANNED
In-Reply-To: <bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
Message-ID: <K_YMb.10994$9k7.204413@news.xtra.co.nz>

Brandon, don't be such an arsehole.  OS developers do things their own 
way and offer their labour for free.  If you don't like it noone will 
care - but don't denegrate people just because they don't do things your 
way.

FYI, porting GPL'd Windows code to Linux can be painful as well as vice 
versa.

Quit insulting people who have done nothing worse than offer you code 
and tools for free.



From bart_nessux at hotmail.com  Tue Jan 27 20:38:51 2004
From: bart_nessux at hotmail.com (Bart Nessux)
Date: Tue, 27 Jan 2004 20:38:51 -0500
Subject: threads
In-Reply-To: <bv72eu$gkv$1@panix3.panix.com>
References: <bv5qu7$hap$1@solaris.cc.vt.edu>
	<mailman.856.1075213416.12720.python-list@python.org>
	<401706AB.6020703@hotmail.com> <bv72eu$gkv$1@panix3.panix.com>
Message-ID: <bv73rc$oul$1@solaris.cc.vt.edu>

Aahz wrote:
> In article <401706AB.6020703 at hotmail.com>,
> Bart Nessux  <bart_nessux at hotmail.com> wrote:
> 
>>Thank you both for the info on threads in Python it was very helpful to 
>>me, I've written something that I think can benefit from threading... 
>>here is the code, I copied this from a few books and a few Web examples 
>>and modified it to suit my test:
>>
>>class trivialthread(threading.Thread):
>>   def url_open(self):
>>      for x in xrange(999999):
>>         f = urllib.urlopen("http://xxx.xxx.xxx")
>>         f.read()
>>         f.close()
>>         print self, x
> 
> 
> Rename ``url_open()`` to ``run()``.  You might want to read the
> slideshow on my web site, paying particular attention to the examples.

Wow, that was a simple fix... thanks for the link. Threads are indeed 
powerful. It's hard to believe what a difference they can make. 
Question: is this equivalent to running the function in parallel? For 
example, say I open 15 shells and run the program... is that doing the 
same thing that threads do?



From exarkun at intarweb.us  Fri Jan  9 11:10:52 2004
From: exarkun at intarweb.us (Jp Calderone)
Date: Fri, 9 Jan 2004 11:10:52 -0500
Subject: how to speedup this code?
In-Reply-To: <btmgtp$grr$1@chessie.cirr.com>
References: <btmgtp$grr$1@chessie.cirr.com>
Message-ID: <20040109161052.GA3140@intarweb.us>

On Fri, Jan 09, 2004 at 03:21:29PM +0000, Ognen Duzlevski wrote:
> Hi all,
> 
> I have rewritten a C program to solve a bioinformatics problem. Portion
> where most of the time is spent is:
> 
> def DynAlign(scoremat,insertmat,delmat,tseq,qseq,tlen,qlen):
>     global ONEINDELPENALTY,OPENGAPPENALTY
> 
>     for ndx1 in range(1,tlen+1):
>         for ndx2 in range(1,qlen+1):
>             delmat[ndx1][ndx2] = Min(delmat[ndx1-1][ndx2]+ONEINDELPENALTY, \
>                              Min(scoremat[ndx1-1][ndx2]+OPENGAPPENALTY+ONEINDELPENALTY, \
>                              insertmat[ndx1-1][ndx2]+OPENGAPPENALTY+ONEINDELPENALTY))
>             insertmat[ndx1][ndx2] = Min(insertmat[ndx1][ndx2-1]+ONEINDELPENALTY, \
>                             Min(scoremat[ndx1][ndx2-1]+OPENGAPPENALTY+ONEINDELPENALTY, \
>                             delmat[ndx1][ndx2-1]+OPENGAPPENALTY+ONEINDELPENALTY))
>             scoremat[ndx1][ndx2] = Min(scoremat[ndx1-1][ndx2-1], \
>                             Min(delmat[ndx1-1][ndx2-1], insertmat[ndx1-1][ndx2-1])) + \
>                             GetFitnessScore(tseq,ndx1-1,qseq,ndx2-1)


  You should definitely be using Numeric Python for this.

> 
> def Min(a,b):
> 	if a< b:
> 		return a
> 	else:
> 		return b


  The builtin function "min" does exactly this, and probably does it quite a
bit faster.

> 
> In C this is not a big deal, delmat, scoremat and insertmat are int
> matrices dynamically allocated and the loop-inside-a-loop is pretty fast.
> However, on python (2.3) it is very slow. So for comparison, my C version
> takes 8 seconds to execute and the python version takes around 730
> seconds. I have narrowed down through visual observation (print before and
> print after entry into the above nested loop) that most of the time is
> spent in there. I have also tried the Numeric package with their arrays.
> It speeded things up somewhat but not considerably.

  Did you loop over the arrays and perform the same operations as DynAlign
above does?  If so, that's not the best way to do it.  Use the matrix
operations it provides.  You'll know when you have written a good Numeric
solution when your code no longer has any `for' loops.

  Jp



From jetman516 at hotmail.com  Fri Jan 16 15:48:07 2004
From: jetman516 at hotmail.com (The Jetman)
Date: 16 Jan 2004 12:48:07 -0800
Subject: SimpleXMLRPCServer
References: <mailman.424.1074245321.12720.python-list@python.org>
	<WFSNb.80288$cM1.14104179@twister.nyc.rr.com>
Message-ID: <a38d43b0.0401161248.79fba7c@posting.google.com>

Maxim Khesin <max at cNvOiSsiPoAnMtech.com> wrote in message news:<WFSNb.80288$cM1.14104179 at twister.nyc.rr.com>...
> whitekid wrote:
> 
> > SimpleXMLRPCServer.py is Just Simple!
> > 
> > A few days age. I considered XMLRPC framework for our service.
> > But finally I choose WebWare. 
> > 
> > Read paper below: http://webware.sourceforge.net/Papers/IntroToWebware.html
> 
> Ok, but I am interested in the XML-RPC protocotl, so how is webware 
> supposed to help me?

Maxim:  Are you interested in something straight fwd and lightweight 
for RPC (the part of the thread I could read didn't cover this) ?  Then, 
XMLRPC is great, not nec better than anything else, just great (of 
the quick-and-dirty variety.)

I just rolled out my own SysProxy for FreeBSD, on behalf of Windows.  I 
had it running in a day or so and it's great.  Essentially, it executes 
FBSD cmds/Python subroutines on behalf of a Windows client (an Access 
program.)

I will definitely extend and use it (SysProxy) into the future.  Later....Jet


From db3l at fitlinxx.com  Tue Jan 20 20:26:26 2004
From: db3l at fitlinxx.com (David Bolen)
Date: 20 Jan 2004 20:26:26 -0500
Subject: always the same object (2)
References: <bukg9s$6e7$1@news.rz.uni-karlsruhe.de>
Message-ID: <u1xpunlbx.fsf@fitlinxx.com>

Uwe Mayer <merkosh at hadiko.de> writes:

(...)
> I use struct.unpack() to unpack data from a binary file and pass the
> returned tuple as parameter to __init__ of a class that's supposed to
> handle the data:
> 
> class DataWrapper():
>         data = { }
>         def __init__(self, arg): #arg will contain a tuple
>                 data['var1'], data['var2'] = arg

Is this actual code?  You should get a SyntaxError on your use of ()
in the class line, and a NameError on your use of data[] since there
is no local data name within the __init__ function.  I'm assuming your
real code actually does self.data, and skips the () on the class
statement, but in the future, it's really best if you can post actual
operating code when discussing a problem.

> result = [ ]
> while not <end-of-file f>:
>         data = struc.unpack("4s4s", f.read(8)) 
>         record = DataWrapper( data ) # pass tuple from unpack 
>         result.append( record )
> 
> Then "result" contains a list with different objects, but the strings 
> in data['var1'] and data['var2'] are all the same.
> 
> Any ideas how to avoid this?

Yes, don't make data a class-level object.  By doing this you have a
single instance of the dictionary that data is pointing to, which is
shared among all of your DataWrapper instances.  Since that class
object is mutable, all of your changes in each instances __init__
affect that single object.  Instead, move the creation of the instance
name (and object) to the __init__ in your instance.

This can be a subtle point sometimes, because you won't run into this
problem with class level immutable objects (such as ints), because any
assignment to the same name in an instance becomes a rebinding
operation, thus making the name an instance variable at that point in
time.  This can be very convenient for implementing class level
defaults that take up no space in each instance, but doesn't work the
same as mutable types.

Note that if you really mean to do it, using a mutable type at class
level can be a very useful construct, since it permits sharing of
information among all instances of a class.  But you have to be
expecting it :-)

For example, the immutable case:

    >>> class Foo:
    ...     var = 10
    ...     def set_var(self, value):
    ...         print 'Var ID:', id(self.var)
    ...         self.var = value
    ...         print 'Var ID:', id(self.var)
    ... 
    >>> x = Foo()
    >>> print id(Foo.var), id(x.var)
    7649236 7649236 
    >>> x.set_var(5)
    Var ID: 7649236
    Var ID: 7649224
    >>> print id(Foo.var), id(x.var)
    7649236 7649224
    >>> print Foo.var, x.var
    10 5

Foo.var always references the same object, but once an assignment has
been made within the instance, it no longer points to the same object
as initialized at class level.  Thus, each instance references
independent objects with their own values.

Contrast this with the mutable case:

    >>> class Foo:
    ...     var = []
    ...     def set_var(self, value):
    ...         print 'Var ID:', id(self.var)
    ...         self.var.append(value)
    ...         print 'Var ID:', id(self.var)
    ... 
    >>> x = Foo()
    >>> y = Foo()
    >>> print id(Foo.var), id(x.var), id(y.var)
    8042256 8042256 8042256
    >>> print Foo.var, x.var, y.var
    [] [] []
    >>> x.set_var(10)
    Var ID: 8042256
    Var ID: 8042256
    >>> y.set_var(5)
    Var ID: 8042256
    Var ID: 8042256
    >>> print id(Foo.var), id(x.var), id(y.var)
    8042256 8042256 8042256
    >>> print Foo.var, x.var, y.var
    [10, 5] [10, 5] [10, 5]

I made the class object a list and appended values to it just to
highlight how calls to multiple instances were affecting the same
object, but the principle is the same with a dictionary or any other
mutable object.  Since the changes in set_var are made by mutating the
existing object (versus rebinding the same name to a new object), all
the instances share the single Foo.var list.

So you could use this construct if you really wanted an object that
was seen by all instances and updated by any instance.  But if you
just wanted an empty list (or dictionary) independently in each
instance, you'd want to do something like:

    >>> class Foo:
    ...     def __init__(self):
    ...         self.var = []
    ...     def set_var(self, value):
    ...         print 'Var ID:', id(self.var)
    ...         self.var.append(value)
    ...         print 'Var ID:', id(self.var)
    ... 
    >>> x = Foo()
    >>> y = Foo()
    >>> print id(Foo.var)
    Traceback (most recent call last):
      File "<stdin>", line 1, in ?
    AttributeError: class Foo has no attribute 'var'
    >>> print id(x.var), id(y.var)
    7756800 8053200
    >>> x.set_var(10)
    Var ID: 7756800
    Var ID: 7756800
    >>> y.set_var(5)
    Var ID: 8053200
    Var ID: 8053200
    >>> print id(x.var), id(y.var)
    7756800 8053200
    >>> print x.var, y.var
    [10] [5]

-- David


From tchur at optushome.com.au  Wed Jan 14 01:39:59 2004
From: tchur at optushome.com.au (Tim Churches)
Date: Wed, 14 Jan 2004 17:39:59 +1100
Subject: Safe prime numbers in Python
Message-ID: <200401140639.i0E6dxt09128@mail001.syd.optusnet.com.au>

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From rganesan at myrealbox.com  Sun Jan 11 06:43:38 2004
From: rganesan at myrealbox.com (Ganesan R)
Date: Sun, 11 Jan 2004 17:13:38 +0530
Subject: QOTW?
References: <ryELb.238$tK2.228@amstwist00> <btn5db$2f8$1@absinth.dialog.net.pl>
	<pan.2004.01.09.21.35.40.132608@yahoo.com>
	<mailman.262.1073742614.12720.python-list@python.org>
	<pan.2004.01.11.07.28.26.422741@yahoo.com>
Message-ID: <oueku67lsl.fsf@andlx-anamika.cisco.com>

>>>>> "Samuel" == Samuel Walters <swalters_usenet at yahoo.com> writes:

> I/O is one of our strengths, because we understand that most programs are
> not algorithmically bound, but rather I/O bound.  I/O is a big
> bottle-neck, so we should be damn good at it.  The fastest assembly
> program won't do much good if it's always waiting on the disk-drive.

Actually, Python is much slower than Perl for I/O. See the thread titled
"Python IO Performance?" in groups.google.com for a thread started by me on
this topic. I am a full time C programmer but do write occasional
Python/Perl for professional/personal use.

To answer the original question about how much percentage of time I spend
optimizing my Python programs - probably never. However I did switch back to
using Perl for my most of my text processing needs. For one program that was
intended to lookup patterns in a gzipped word list, performance of the
original python version was horribly slow. Instead of rewriting it in Perl,
I simply opened a pipe to zgrep and did post processing in python. This
turned out to be much faster - I don't remember how much faster, but I
remember waiting for the output from the pure python version while the
python+zgrep hybrid results were almost instantaneous.

Ganesan

--
Ganesan R



From Florian.Lindner at xgm.de  Sun Jan  4 16:36:30 2004
From: Florian.Lindner at xgm.de (Florian Lindner)
Date: Sun, 04 Jan 2004 22:36:30 +0100
Subject: Problems compiling python
References: <bt9u1m$ek3$05$1@news.t-online.com> <3FF88279.33BF192A@alcyone.com>
Message-ID: <bta0pq$v7$00$1@news.t-online.com>

Erik Max Francis wrote:

> Florian Lindner wrote:
> 
>> I want to compile that small python script:
> ...
>> bastet:/ # chmod u+x test.pyc
>> bastet:/ # ./test.pyc
>> ./test.pyc: line 1: syntax error near unexpected token `;'
>> '/test.pyc: line 1: `;??
>> bastet:/ #
>> 
>> What is wrong?
> 
> A compiled Python file (.pyc) is not an executable.  (Specifically, in
> the Unix world, it does not contain a bangpath.)  Instead, just pass it
> as an argument to the Python interpreter:
> 
> max at oxygen:~/tmp% cat > hello.py
> print "Hello, world!"
> ^D
> max at oxygen:~/tmp% python
> Python 2.3.3 (#1, Dec 22 2003, 23:44:26)
> [GCC 3.2.3] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
>>>> import py_compile
>>>> py_compile.compile('hello.py')
>>>> ^D
> max at oxygen:~/tmp% ls hello.py*
> hello.py  hello.pyc
> max at oxygen:~/tmp% rm hello.py
> max at oxygen:~/tmp% python hello.pyc
> Hello, world!

Can I run these scripts under another UID than the user executing them?
(SUID)

Thx,
Florian


From aprogrammer at fastmail.fm  Wed Jan 21 22:43:22 2004
From: aprogrammer at fastmail.fm (Ikot)
Date: 21 Jan 2004 19:43:22 -0800
Subject: Converting a string to integer/float
Message-ID: <2981adb9.0401211943.e1ae272@posting.google.com>

Hello,
I am stuck with a problem, might be very trivial, to ask here, but
dont find a way out. I read a string like 12345.678 from a text file,
which will be string for me, but how do I convert it into a float for
my use ?
Thanks
Ikot


From adalke at mindspring.com  Wed Jan 14 17:41:01 2004
From: adalke at mindspring.com (Andrew Dalke)
Date: Wed, 14 Jan 2004 22:41:01 GMT
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
	<K_YMb.10994$9k7.204413@news.xtra.co.nz>
	<bu1qq3$cu440$1@ID-207230.news.uni-berlin.de>
	<n22Nb.11299$9k7.210522@news.xtra.co.nz>
	<bu2pgs$d123a$1@ID-207230.news.uni-berlin.de>
	<4004EC9E.1E2E2893@alcyone.com>
	<23891c90.0401140223.344b22af@posting.google.com>
	<100bbb6kj9m03a4@corp.supernews.com>
	<bu4cdk$cv09p$1@ID-207230.news.uni-berlin.de>
Message-ID: <1AjNb.8936$1e.894@newsread2.news.pas.earthlink.net>

Brandon J. Van Every:
> Is there something fundamentally *wrong* with recognizing how useless
people
> are to your purposes?

Nope.  But if you blabber it to everyone in the manner you have
then when you do need someone else's help you're less likely to
get it.

It's made even worse when you make claims related to your
profession (like "Even 12 years ago, "Computer Graphics: Principles
and Practice" didn't teach texture mapping.  Along came DOOM.")
which is proveably false for several reasons
(http://groups.google.com/groups?selm=aemtb.1153%24sb4.720%40newsread2.news.
pas.earthlink.net&oe=UTF-8&output=gplain )
because then people tend to remind others of your follies to show
that your knowledge is less than you think it is.

                    Andrew
                    dalke at dalkescientific.com




From martin at v.loewis.de  Sat Jan 24 04:11:49 2004
From: martin at v.loewis.de (=?ISO-8859-15?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 24 Jan 2004 10:11:49 +0100
Subject: How to build Tkinter as extension module?
In-Reply-To: <pan.2004.01.23.20.47.38.531142@freenet.de>
References: <pan.2004.01.23.20.47.38.531142@freenet.de>
Message-ID: <butcse$ndi$04$2@news.t-online.com>

Guido Schimmels wrote:

> When I build python with tkinter support (Linux), the python interpreter
> is linked to the tcl/tk shared libraries, thus making them a hard
> dependency. That is unfortunate. A friend told me, Debian supports tkinter
> via an autonomous extension module. I have looked at the Debian rules file
> but wasn't able to discover the trick. 

Don't add _tkinter in Modules/Setup, or uncomment the *shared* line
in Setup.

Regards,
Martin



From jepler at unpythonic.net  Sun Jan 25 19:11:45 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Sun, 25 Jan 2004 18:11:45 -0600
Subject: xrange not hashable - why not?
In-Reply-To: <40145A07.2070906@zephyrfalcon.org>
References: <20040125144724.GA13741@nl.linux.org>
	<40145A07.2070906@zephyrfalcon.org>
Message-ID: <20040126001145.GB2593@unpythonic.net>

On Sun, Jan 25, 2004 at 07:06:31PM -0500, Hans Nowak wrote:
> So far, everybody who replied seems to agree or assumes that xrange indeed 
> isn't hashable.  However:
[...]

It wasn't in older versions:
$ python
Python 2.2.2 (#1, Feb 24 2003, 19:13:11) 
[GCC 3.2.2 20030222 (Red Hat Linux 3.2.2-4)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> hash(xrange(0))
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
TypeError: unhashable type

Jeff



From PeterAbel at gmx.net  Fri Jan 16 07:33:17 2004
From: PeterAbel at gmx.net (Peter Abel)
Date: 16 Jan 2004 04:33:17 -0800
Subject: Inserting while itterating
References: <pan.2004.01.14.08.43.00.894047@thomas-guettler.de>
Message-ID: <21064255.0401160433.671f5291@posting.google.com>

"Thomas Guettler" <guettli at thomas-guettler.de> wrote in message news:<pan.2004.01.14.08.43.00.894047 at thomas-guettler.de>...
> Hi,
> 
> Simple excerise:
> 
> You have a sorted list of integers:
> l=[1, 2, 4, 7, 8, 12]
> 
> and you should fill all gaps:
> 
> result == [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]
> 
> How would you code this?
> 
> Constrain: The original list should be changed,
> don't create a copy.
> 
>   thomas


>>> l = [1, 2, 4, 7, 8, 12]
>>> id(l)
27295112
>>> for i in range(len(l)-1,0,-1):
... 	for j in range(l[i]-l[i-1]-1):
... 		l.insert(i,l[i]-1)
... 
>>> id(l)
27295112
>>> l
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]
>>> 

Tested, but no idea about timing.

Regards
Peter


From rimbalaya at yahoo.com  Wed Jan 21 00:18:17 2004
From: rimbalaya at yahoo.com (Rim)
Date: 20 Jan 2004 21:18:17 -0800
Subject: Introspection and member ordering
Message-ID: <6f03c4a5.0401202118.d17d7a8@posting.google.com>

Hi,

Is there a way to get any sort of introspection which would return the
content of an instance *in the order they were declared or executed*
as opposed to alphabetical order?

Example:

>>> class a:
...    def __init__(self):
...       self.value = 12
...       self.avalue = 78
>>> class b(a):
...    def __init__(self):
...       a.__init__(self)
...       self.bvalue = 5
...    def f(self):
...       self.z = 3
... 
>>> c=b()
>>> c.__dict__
{'bvalue': 5, 'avalue': 78, 'value': 12}

Wrong answer, I am looking for something that would give me
{'value':12, 'avalue':78, 'bvalue':5'}

I tried the inspect.getmembers(c) without success.

Anyone has some advice how I can get the members listed in declaration
or execution order?

Thanks
 -Rim


From Florian.Lindner at xgm.de  Mon Jan  5 12:20:20 2004
From: Florian.Lindner at xgm.de (Florian Lindner)
Date: Mon, 05 Jan 2004 18:20:20 +0100
Subject: Get UID of username
Message-ID: <btc65f$i3l$01$1@news.t-online.com>

Hello,
how can I find out the UID of a username on a linux system?
Thx,
Florian


From skip at pobox.com  Sun Jan  4 10:47:46 2004
From: skip at pobox.com (Skip Montanaro)
Date: Sun, 4 Jan 2004 09:47:46 -0600
Subject: Recurring dates module [was: Project dream]
In-Reply-To: <20040104.002126.-3883603.2.eltronic@juno.com>
References: <20040104.002126.-3883603.2.eltronic@juno.com>
Message-ID: <16376.13730.492349.402651@montanaro.dyndns.org>


    eltronic> rats, datetime IIR is only py2.3 unless it already works in
    eltronic> py2* or some kind soul has backported it ala sets and some of
    eltronic> itertools. 

Tim originally wrote datetime in Python.  You can grab the latest version
from the CVS sandbox:

    http://cvs.sourceforge.net/viewcvs.py/python/python/nondist/sandbox/datetime/datetime.py

It seems it's been awhile since it was updated (nearly a year ago), so you
may have to tweak it to add recent functionality.

There has been recent discussion on python-dev about what to do with the
Python version of a module after it's been rewritten in C.  It would be nice
if someone figured out a way to keep datetime.py in sync with the C
version.  Nice properties include:

    * continued availability in the source tree without installation

    * ability to specify the Python version of a module when running
      regression tests

Skip



From nospam-deets at web.de  Fri Jan 23 08:05:11 2004
From: nospam-deets at web.de (Diez B. Roggisch)
Date: Fri, 23 Jan 2004 14:05:11 +0100
Subject: Server and Client Socket problem
References: <bur59q$kel$1@nsnmrro2-gest.nuria.telefonica-data.net>
Message-ID: <bur638$kjb5o$1@ID-111250.news.uni-berlin.de>

Hi,


> import socket
>         def run():
> servidor = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
> servidor.bind(('localhost', 6969))
> servidor.listen(1)
> while 1:
>  (conexion, direccion) = servidor.accept()
> datos = conexion.recv(4069)
>  print "Servidor Recibe", datos
>                 if datos == "quit":
>                     servidor.close()
>                 break
> 
>         run()

This code can obviously not run, as its not properly indented. I'm sure that
indentation got somehow lost when you create the posting, but as long as
you don't provide it in a executable fashion, we can't help you.

However, as someone beeing recently converted from hand-made socket
programming to twisted, I suggest instead of working with sockets yourself,
you better investigate into the twisted framework. Its very well
documented.

Regards,

Diez B. Roggisch


From usenet at mail-2-me.com  Thu Jan 22 08:50:58 2004
From: usenet at mail-2-me.com (Dirk Hagemann)
Date: 22 Jan 2004 05:50:58 -0800
Subject: NetGetAnyDCName() - get PDC of a foreign WinNT-domain
Message-ID: <a37aa972.0401220550.1573106c@posting.google.com>

Hi!

I'm trying to get the PDC-Computername of a foreign WinNT-domain, but
I only managed to get the PDC of my own domain with this code:
pdc=win32net.NetGetAnyDCName()

I think it should be possible to get the PDC of a foreign domain
(which is a trusted domain) with this code. If I'm right with this
assumption, could anyone give me an example-code?
Or tell me that I'm wrong, then I can concentrate on something else...

Thanks!
Dirk


From skip at pobox.com  Sun Jan 25 15:29:41 2004
From: skip at pobox.com (Skip Montanaro)
Date: Sun, 25 Jan 2004 14:29:41 -0600
Subject: Python and writing a CSV file
In-Reply-To: <cg68105aq9ormbfkt7g4im31dcb16jlno6@4ax.com>
References: <mailman.611.1074719029.12720.python-list@python.org>
	<kNDPb.6494$6o4.181@fe2.texas.rr.com>
	<20040121232549.GA28328@mail.theserver.ath.cx>
	<009501c3e07e$80b62e30$97443d42@homebass1>
	<16399.7079.192926.761791@montanaro.dyndns.org>
	<000c01c3e2b7$a6eabcc0$97443d42@homebass1>
	<mailman.767.1075053933.12720.python-list@python.org>
	<cg68105aq9ormbfkt7g4im31dcb16jlno6@4ax.com>
Message-ID: <16404.10037.814575.148874@montanaro.dyndns.org>


    Norm> writer = csv.writer(file('csv_test.CSV', 'w'))
    ...
    Norm> So the question is, where does the extra crlf in the csv file come
    Norm> from? And how do I get rid of it?

Try opening the CSV file in binary mode:

    writer = csv.writer(file('csv_test.CSV', 'wb'))

Skip



From yet-another at no-domain.cn  Thu Jan  1 02:25:50 2004
From: yet-another at no-domain.cn (Jules Dubois)
Date: Thu, 1 Jan 2004 00:25:50 -0700
Subject: Where to go from here? newbee
References: <bt0asa02hj8@enews1.newsguy.com>
Message-ID: <1koon5kaqkghf.211m8yj2j32t$.dlg@40tude.net>

On Wed, 31 Dec 2003 23:22:43 -0600, in article
<news:bt0asa02hj8 at enews1.newsguy.com>, Richard wrote:

> Just downloaded python for the fun of it.
> What do I run to begin coding with?
> Version 2.3.3

Yes, unless you have some reason to use an older release.

> When I run the "command line" thing, I get a dos window.
> Now what?

Type some commands and see how the interpreter works.  

Go to http://www.cs.unm.edu/~ej and click on these links.

  Python Hacking I (Just do it!)
  Python Hacking II (types, functions, exceptions)
  Python Hacking III 

Type the commands and see what happens.

Go to http://www.python.org/ and find some more advanced tutorials.


From claird at lairds.com  Wed Jan 28 12:25:32 2004
From: claird at lairds.com (Cameron Laird)
Date: Wed, 28 Jan 2004 17:25:32 -0000
Subject: Tcl style traces
References: <40171be5$0$1742$5a62ac22@freenews.iinet.net.au>
	<mailman.890.1075270902.12720.python-list@python.org>
	<40177f07$0$1730$5a62ac22@freenews.iinet.net.au>
	<101fkp3nd3ea84c@news.supernews.com>
Message-ID: <101fs4c77g79vdc@corp.supernews.com>

In article <101fkp3nd3ea84c at news.supernews.com>,
John Roth <newsgroups at jhrothjr.com> wrote:
>
>"Derek Fountain" <nomail at hursley.ibm.com> wrote in message
>news:40177f07$0$1730$5a62ac22 at freenews.iinet.net.au...
>> > What do you need this for?  If you can be more specific, we might be
>able
>> > to help you a little better.
>>
>> I have a Tcl/Tk script which uses a canvas to graphically represent the
>data
>> stored in the program. Whenever the data store is updated, a Tcl trace
>> automatically triggers to ensure the graphical display is kept consistent
>> with the data. I was after a simple way to convert the script to Python
>> Tkinter. Without the eqivalent of Tcl traces I'm probably going to have to
>> think about it... ;o)
>
>There's a facility where you can associate a widget with a
>variable so that when the variable changes the widget's
>value changes, and vice versa. I don't offhand remember the
>details though. You'll need to look at one of the references.
>The variable has to be a subclass of a special Tkinter class
>for this to work, though.
			.
			.
			.
textvariable--but that applies only for a few widgets,
and only for equivalence of the widget content and the
indicated variable; there's no formatting or other pro-
cedural computation.
-- 

Cameron Laird <claird at phaseit.net>
Business:  http://www.Phaseit.net


From sdeibel at wingide.com  Fri Jan 16 11:23:18 2004
From: sdeibel at wingide.com (Stephan Deibel)
Date: Fri, 16 Jan 2004 11:23:18 -0500 (EST)
Subject: wxPython worries
In-Reply-To: <92c59a2c.0401152257.5b93167b@posting.google.com>
Message-ID: <Pine.LNX.4.50.0401161104290.3125-100000@hedgehog>

On Fri, 15 Jan 2004, MetalOne wrote:
> wxWindows and Tk are the only toolkits that wrap native Windows
> controls.  The others all emulate controls.  I am thinking about
> trying out another toolkit.
> FOX, FLTK or GTK.

GTK2 is worth looking at if you're writing a complex GUI and are
worried about running into problems with wx's wrapper approach
and small differences between what the underlying widgets support.
It's fairly complex and probably has a steeper learning curve, but
has a nice design.  I'm continuously amazed at what I can write on
one OS and run w/o problems on others.

On Windows, you will want to use the gtk-wimp theme, which makes
it look and act more like native Windows apps (via emulation):

http://gtk-wimp.sourceforge.net/

There are various GUI builders for GTK but I've found writing
the GUI code manually to be easy enough to do.

If you try to use it and need to build from sources, let me know
and I'll share some Python scripts that make building on Windows
(and other platforms) easier.

Stephan Deibel

--
Wing IDE for Python
Archaeopteryx Software, Inc
Take Flight!

www.wingide.com



From michele.simionato at poste.it  Tue Jan  6 08:22:09 2004
From: michele.simionato at poste.it (Michele Simionato)
Date: 6 Jan 2004 05:22:09 -0800
Subject: RELEASED: allout-vim 031229
References: <mailman.26.1072753109.8134.python-list@python.org>
	<pan.2003.12.31.05.47.10.999283@yahoo.com>
	<mailman.70.1072876780.8134.python-list@python.org>
	<pan.2003.12.31.14.49.29.838030@yahoo.com>
	<mailman.72.1072888283.8134.python-list@python.org>
	<yfsr7ykb8a4.fsf@black132.ex.ac.uk>
	<mailman.17.1072988207.12720.python-list@python.org>
	<87d69yqsos.fsf@pobox.com>
Message-ID: <95aa1afa.0401060522.630e5cbb@posting.google.com>

jjl at pobox.com (John J. Lee) wrote in message news:<87d69yqsos.fsf at pobox.com>...
> Fran?ois Pinard <pinard at iro.umontreal.ca> writes:
> No, actually, a *real* OT comment: I'm pretty sure I've seen two big
> pieces of code, by two French authors, in which the word "eventually"
> is used all over the place, in a way that clearly means something to
> French people <wink>.  "eventually" --> "finally", perhaps?  I don't
> think it's as simple as that, though.  One example:
> 
> http://pybliographer.org/
> 
> 
> John

"Eventuellement" (or the Italian "eventualmente")
means "possibly", not "eventually".

See also

http://www.learn-french-now.com/french-false-friends.html


From james at logicalprogression.net  Fri Jan 16 19:51:05 2004
From: james at logicalprogression.net (James Henderson)
Date: Sat, 17 Jan 2004 00:51:05 +0000
Subject: Bug or feature?
In-Reply-To: <16392.27363.264594.821314@montanaro.dyndns.org>
References: <bu58st$1ha3$1@news.rtcomm.ru>
	<200401162241.07500.james@logicalprogression.net>
	<16392.27363.264594.821314@montanaro.dyndns.org>
Message-ID: <200401170051.05989.james@logicalprogression.net>

On Friday 16 January 2004 10:51 pm, Skip Montanaro wrote:
>     >> Of course, it should be noted that, in Python, "a += b" is only
>     >> sometimes synonymous with "a = a + b".  The rest of the time, it's
>     >> hard to say what it is synonymous with :)
>
>     James> What do you have in mind?  J.
>
> For immutable objects, += works as you'd expect: return a new object,
> leaving the old object unchanged.  That's not the case for mutable objects,
>
> to wit:
>     >>> foo = [1]
>     >>> bar = foo
>     >>> foo += [2]
>
> The object referenced by foo is modified in-place...
>
>     >>> bar
>
>     [1, 2]
>
>     >>> foo = foo + [2]
>
> Here foo is bound to a new object, leaving the old object (still referenced
> by bar) unchanged.
>
>     >>> foo
>
>     [1, 2, 2]
>
>     >>> bar
>
>     [1, 2]
>
> Skip

Thanks for pointing that out.  It's also the case the += may be more 
efficient, although that doesn't undermine my original point about surface 
behaviour.

For any third party interested the details are at:

http://www.python.org/doc/current/ref/augassign.html

Back to the original topic, I have to agree with Robert Brewer that Alexey 
Nezhdanov's proposal was capable of several other interpretations than a 
switch to right-to-left evaluation.

James
-- 
James Henderson, Logical Progression Ltd.
http://www.logicalprogression.net/
http://sourceforge.net/projects/mailmanager/




From dlmurray at micro-net.com  Mon Jan  5 01:42:42 2004
From: dlmurray at micro-net.com (Dave Murray)
Date: Sun, 4 Jan 2004 23:42:42 -0700
Subject: Why does this fail?
References: <vvhdlm72386b3c@corp.supernews.com>
	<vvhkngs7oachad@corp.supernews.com>
	<84fc4588.0401042209.60cdb724@posting.google.com>
Message-ID: <vvi1rqmdecbl1a@corp.supernews.com>

Thank you for the information. I will check them out after I finish my
effort. My purpose isn't to obtain a spider program, it is to learn Python
by doing. If the exercise will result in something that I can use, it gives
me incentive to not abandon the effort because the exercise is interesting
to me. The sources that you pointed out should be rich in information on how
I could have done it better if I had been more experienced in Python
(knowledgeable about it's libraries, etc.)

Whenever I learn something new I like to work at it, get help if I'm stuck
on something silly (why waste time?), assess what I did against a higher
standard, repeat. It's just the way that I learn. I can see that this forum
will be just what I need for a chunk of that process. I appreciate it.

Regards,
Dave

----- Original Message ----- 
From: "Anand Pillai" <pythonguy at Hotpop.com>


> I could not help replying to this thread...
>
> There are already quite a lot of spider programs existing
> in Python. --
>   This is the main reason why developers release programs as
> opensource. Help the community, and help yourselves. Re-inventing
> the wheel is perhaps not the way to go.




From james at eccehomo.co.uk  Wed Jan 14 09:54:44 2004
From: james at eccehomo.co.uk (James Goldwater)
Date: Wed, 14 Jan 2004 14:54:44 +0000
Subject: wxPython worries
Message-ID: <40055834.4080200@eccehomo.co.uk>

I'm starting a new hopfully-commercial project soon, and I face a 
dilemma about whether Python with wxPython would be appropriate.

The project has 3 main areas:

a) manipulation of lists and trees, using..
b) a hopefully dead-sexy gui, all in order to...
c) eventually pump out certain bits of the datastructure over the 
network in semi-realtime (< 10ms accuracy or so).

The target is Win32 for now (98 - XP). Now, if it were up to me, I'd use 
Delphi - it's what I know best.  But I'm working with a less experienced 
developer with whom I have no languages in common.  He's keen to get 
started on C#, I've toyed with C# and though it looks easy, I don't see 
any major gains over what I already know.

I've read a lot about python and done some mini-stuff in it, and been 
impressed with it's ease and conciseness.  What worries me is wxPython: 
looking at the demo code, it's quite verbose and 'bitty'.  I'm also 
unclear as to how easy custom controls are to build.

Am I just being confused by my newbie-ness, or are my initial concerns 
justified?  What's anybody else's experiences with gui programming in 
wxPython like vs a RAD like Delphi or .NET?

Thanks,

James.




From ih8spam at spamtrap.com  Tue Jan 13 17:42:07 2004
From: ih8spam at spamtrap.com (WTH)
Date: Tue, 13 Jan 2004 17:42:07 -0500
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
	<K_YMb.10994$9k7.204413@news.xtra.co.nz>
	<bu1qq3$cu440$1@ID-207230.news.uni-berlin.de>
	<slrnc08sfp.44h.me@localhost.localdomain>
Message-ID: <1008su65sie7m72@corp.supernews.com>

>the others write software that'll
> make them money for fixing their own mistakes after the fact ;)

Ixnay on the ecretsay...

    WTH




From dj00302003 at yahoo.com  Fri Jan  9 21:38:08 2004
From: dj00302003 at yahoo.com (Jay Davis)
Date: 9 Jan 2004 18:38:08 -0800
Subject: wxPython Application over the net
Message-ID: <1d17eeb7.0401091838.3eef2093@posting.google.com>

We have an application in wxPython that works quite well on 
our local computers, but we want people to be able to run
the program over the internet.  One way that would work
is to use an Xwindows server and just have people connect
to the program on our local host, but we would like to work
in an internet browser because not everyone has an Xserver.

Is there any reasonable way to run a wxPython app inside 
a browser?


From jcarlson at nospam.uci.edu  Tue Jan 27 16:49:16 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Tue, 27 Jan 2004 13:49:16 -0800
Subject: I support PEP 326
In-Reply-To: <KQvRb.120450$6y6.2383917@bgtnsc05-news.ops.worldnet.att.net>
References: <mailman.654.1074788734.12720.python-list@python.org>
	<10105bn3bsi63c9@news.supernews.com>
	<e838aa6e.0401261158.513e0389@posting.google.com>
	<bv3t62$mb9$1@news.service.uci.edu>
	<KQvRb.120450$6y6.2383917@bgtnsc05-news.ops.worldnet.att.net>
Message-ID: <bv6mgu$sb8$1@news.service.uci.edu>

Andrew Koenig wrote:
>>The issue is that when Min and None are in a sequence that gets sorted,
>>you can end up with Minimums and Nones getting interspersed like so:
>>[Min, None, Min...]
> 
> 
> If Min and None were two different names for the same object, such behavior
> would be moot.
> However, the following anomalies might then appear:
> 
>     >>> None
>     None
>     >>> Min
>     None
> 
> (after all, if they're the same object, how is the interpreter to know which
> print name to use?)

Additionally, None comparing smaller than everything else is neither 
intuitive, nor really documented (as reiterated a few times by a few 
different people in python-dev).  It was an arbitrary decision, but 
better than None comparing larger than everything.

  - Josiah


From sidharthk at hotmail.com  Wed Jan 28 12:07:39 2004
From: sidharthk at hotmail.com (Sidharth Kuruvila)
Date: Wed, 28 Jan 2004 22:37:39 +0530
Subject: isinstance() bug
References: <mailman.907.1075296157.12720.python-list@python.org><bv8lha$pbi5a$1@ID-223265.news.uni-berlin.de>
	<mailman.929.1075306173.12720.python-list@python.org>
Message-ID: <bv8qhc$ph1mk$1@ID-223265.news.uni-berlin.de>

i dont know unix.
how does abs path work with sym-links.





From jjl at pobox.com  Wed Jan 14 19:28:07 2004
From: jjl at pobox.com (John J. Lee)
Date: 15 Jan 2004 00:28:07 +0000
Subject: Why learn Python ??
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<slrnc07r8m.36l.davecook@localhost.localdomain>
	<87u12z90eq.fsf@pobox.com>
Message-ID: <87vfnerr6w.fsf@pobox.com>

jjl at pobox.com (John J. Lee) writes:

> "David M. Cook" <davecook at nowhere.net> writes:
> 
> > In article <40029dad$0$28706$a729d347 at news.telepac.pt>, Bicho Verde wrote:
> [...]
> > You could casually pick up enough Python to be useful in a week or so of
> > evenings.  
> > 
> > Perl is not much harder,
> 
> It *seems* so when you first learn it...
> 
> > but has a lot of "gotchas".
> 
> ... and they never end!  Ilya Zakharevich (a "Perl God"):
[...]

Can't resist another bit of Perl-bashing: I just noticed this bit of
the FSF's license page.  There's an amusing (and not accidental, I
think) parallel between the language and its license:

http://www.fsf.org/licenses/license-list.html

The (Original) Artistic License.
    We cannot say that this is a free software license because it is
    too vague; some passages are too clever for their own good, and
    their meaning is not clear. We urge you to avoid using
    it,[snip...]


John


From fumanchu at amor.org  Tue Jan 13 12:44:32 2004
From: fumanchu at amor.org (Robert Brewer)
Date: Tue, 13 Jan 2004 09:44:32 -0800
Subject: Does anyone else not find the fun in programming...?
Message-ID: <DE1CF2B4FEC4A342BF62B6B2B334601E561BF5@opus.amorhq.net>

> I find python very effective as a language and can generally project
> most of my hazy thoughts into it. But FUN !!! This is work dammit,
> I have now ground my teeth down from the number of times I read that
> programming is fun. Football (association) is fun, walking along
> canals is fun, Arguing about quite how useless the British Government
> is fun but programming  ?

Different people find different activities to be "fun" (for various
definitions of "fun"). I personally enjoy _design_, and programming
provides a context for that, but there are other vehicles for meeting my
daily design quota. Python in particular allows me to focus on
higher-level design issues (compared to other languages I've used).

One of the interesting things about computers in general is their
ability to be a vehicle for most things people enjoy, if only virtually.
My sincere sympathies to anyone who is stuck programming (or doing any
other kind of work with computers) for a paycheck only.


FuManChu



From __peter__ at web.de  Sun Jan  4 11:27:00 2004
From: __peter__ at web.de (Peter Otten)
Date: Sun, 04 Jan 2004 17:27:00 +0100
Subject: how to make a code object a function
References: <bt93ds$tuv$00$1@news.t-online.com>
	<bt96ll$75c$02$1@news.t-online.com>
	<bt9cd0$t3q$01$1@news.t-online.com>
Message-ID: <bt9ekh$8tt$07$1@news.t-online.com>

Diez B. Roggisch wrote:

> Interesting - from the docs, I can't see that types.MethodType has a
> constructor like this.

It get's really funny if you look into the source (types.py):

class _C:
    def _m(self): pass
ClassType = type(_C)
UnboundMethodType = type(_C._m)         # Same as MethodType
_x = _C()
InstanceType = type(_x)
MethodType = type(_x._m)

Seems we caught them cheating here :-)

> Just out of curiosity - is there a way to know the name of a code object
> you know nothing about except that it will become a function definition? I
> guess I could go for some AST-stuff looking for a "def foo" statement, so
> I know I will end up having defined foo when exec'ing the code object.

You could provide a separate namespace and then extract only the callables:

>>> d = {}
>>> exec "factor=2\ndef alpha(s, t): print factor*t" in d
>>> d.keys()
['__builtins__', 'alpha', 'factor']
>>> funcs = dict([(n,f) for n, f in d.iteritems() if callable(f)])
>>> funcs
{'alpha': <function alpha at 0x4029025c>}
>>> funcs["alpha"](None, 2)
4

Peter




From swalters_usenet at yahoo.com  Sun Jan 18 17:00:54 2004
From: swalters_usenet at yahoo.com (Samuel Walters)
Date: Sun, 18 Jan 2004 22:00:54 GMT
Subject: Forums for Teachers Using Python - Where are they?
References: <pan.2004.01.18.11.30.20.988949@yahoo.com>
	<mailman.469.1074442222.12720.python-list@python.org>
Message-ID: <pan.2004.01.18.21.59.21.755530@yahoo.com>

| Mike C. Fletcher said |

> Official forum of this type is the Education Special Interest Group 
> (sig), or edu-sig.  You can find out more, subscribe and the like here:
> 
>     http://mail.python.org/mailman/listinfo/edu-sig

Thank you.  Like your car-keys, stuff like that is always in the most
obvious spot you didn't check.

Sam Walters.

-- 
Never forget the halloween documents.
http://www.opensource.org/halloween/
""" Where will Microsoft try to drag you today?
    Do you really want to go there?"""



From tim.one at comcast.net  Fri Jan 30 10:49:11 2004
From: tim.one at comcast.net (Tim Peters)
Date: Fri, 30 Jan 2004 10:49:11 -0500
Subject: NEWLINE character problem
In-Reply-To: <pan.2004.01.30.15.30.35.850176@phreaker.net>
Message-ID: <LNBBLJKPBEHFEDALKOLCKEIGIKAB.tim.one@comcast.net>

[Nuff, replying to someone who has strings with various line-end
 conventions]

> Say your string is s; then you could use the following
> function (untested!) to make sure that s uses \n only:
>
>     def fix_lineendings(txt):
>         if txt.count('\r\n'):  # MS DOS
>             txt = txt.replace('\r\n', '\n')
>         elif txt.count('\r'):  # Mac
>             txt = txt.replace('\r', '\n')
>
>         return txt
>
> Simply write: s = fix_lineendings(s)

That's in the right direction.  There's no need to count the *number* of
each kind of oddball, and .count() does all the work that .replace() does
anyway if there aren't any oddballs.  So the one-liner:

    return s.replace('\r\n', '\n').replace('\r', '\n')

does the same, but quicker.  Note that, as an internal optimization,
.replace() doesn't build a new string object unless it finds something to
replace, so it's actually slower to do an "if" test first.

>>> s = 'abcdefghi\n\n'  # doesn't contain any oddballs
>>> t = s.replace('\r\n', '\n').replace('\r', '\n')
>>> s == t
True  # nothing was replaced
>>> s is t
True  # more, the same string object was returned by both .replace()s
>>>




From sabu at mad.scientist.com  Mon Jan 19 00:22:02 2004
From: sabu at mad.scientist.com (Xavier Kaotico)
Date: Mon, 19 Jan 2004 00:22:02 -0500
Subject: STDIN remote address?
Message-ID: <20040119052202.710.qmail@mail.com>

Greetings,

I have come up to a stand still here with a small bit of code.  My purpose is to figure out the remote IP address associated with stdin.  I tried porting the following code (which did this easily in C):

  struct sockaddr_in sin;
  unsigned int nl = sizeof (struct sockaddr_in);
  int test = getpeername (IO_STDIN, (struct sockaddr *) &sin, &nl);

I heard there was a libc call which gave me the exact information I needed, but I have not looked into it yet.  Does anyone have any idea how this can be pulled off?

Oh, and the furthest I got was looking into socket.fromfd(), but I got sidetracked.

Thanks in advance!
-- 
_______________________________________________
Get your free email from http://www.mail.com




From jcarlson at nospam.uci.edu  Sat Jan 24 04:01:11 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Sat, 24 Jan 2004 01:01:11 -0800
Subject: pty difficulties
In-Reply-To: <2e262238.0401232202.5b21eba8@posting.google.com>
References: <2e262238.0401232202.5b21eba8@posting.google.com>
Message-ID: <butccm$2un$1@news.service.uci.edu>

>         while True:
>             readable = select(connections.keys(), [], [])[0]
>             for f in readable:
>                 data = read(f.fileno(), 1024)
>                 connections[f].write(data)
>                 connections[f].flush()

I believe your problem exists in the write and flush.  All you seem to 
be doing is checking to see if your reading file handles are capable of 
reading, you never check to see if you can write to anything.  Your lisp 
interpreter showcases the fact that it is not ready to get a write while 
it is interpreting, by failing.  I believe the following should fix you up:

         while True:
             readable = select(connections.keys(), [], [])[0]
             for f in readable:
                 if select([], [connections[f]], [], 0)[1]:
                     data = read(f.fileno(), 1024)
                     connections[f].write(data)
                     connections[f].flush()

  - Josiah


From owner-mutt-announce at mutt.org  Tue Jan 27 04:39:37 2004
From: owner-mutt-announce at mutt.org (owner-mutt-announce at mutt.org)
Date: 27 Jan 2004 09:39:37 -0000
Subject: mutt-announce@mutt.org: Non-member submission from
	python-list@python.org
Message-ID: <20040127093937.10211.qmail@agent57.gbnet.net>



Your submission to the list has been forwarded to the list
owner <owner-mutt-announce at mutt.org> for approval because you do not seem to be on 
that list.

If you want to join the list, send email to <Majordomo at mutt.org>, with
"subscribe mutt-announce" in the message text (not the subject).




From astrand at lysator.liu.se  Sat Jan  3 17:27:12 2004
From: astrand at lysator.liu.se (Peter Astrand)
Date: Sat, 3 Jan 2004 23:27:12 +0100 (CET)
Subject: [Python-Dev] PEP 324: popen5 - New POSIX process module
In-Reply-To: <3FF73920.8090402@v.loewis.de>
Message-ID: <Pine.LNX.4.44.0401032302210.778-100000@aristocat.lysator.liu.se>

On Sat, 3 Jan 2004, Martin v. Loewis wrote:

> >     - One "unified" module provides all functionality from previous
> >       functions.
> 
> I doubt this is a good thing. Different applications have different
> needs - having different API for them is reasonable.

I don't agree. I have used all of the existing mechanism in lots of apps,
and it's just a pain. There are lots of functions to choose between, but
none does what you really want. 


> >     - Cross-process exceptions: Exceptions happening in the child
> >       before the new process has started to execute are re-raised in
> >       the parent.  This means that it's easy to handle exec()
> >       failures, for example.  With popen2, for example, it's
> >       impossible to detect if the execution failed.
> 
> This is a bug in popen2, IMO. Fixing it is a good thing, but does not
> require a new module.

"Fixing popen2" would mean a break old applications; exceptions will 
happen, which apps are not prepared of. 


> >     - A hook for executing custom code between fork and exec.  This
> >       can be used for, for example, changing uid.
> 
> Such a hook could be merged as a keyword argument into the existing
> API.

Into which module/method/function? There is no one flexible enough. The 
case for redirecting only stderr is just one example; this is simple not 
possible with the current API. 


> >     - All combinations of file descriptor redirection is possible.
> >       For example, the "python-dialog" [2] needs to spawn a process
> >       and redirect stderr, but not stdout.  This is not possible with
> >       current functions, without using temporary files.
> 
> Sounds like a new function on the popen2 module.

To support all combinations, 12 different functions are necessary. Who 
will remember what popen2.popen11() means? 

 
> >     - Support for connecting several subprocesses (shell "pipe").
> 
> Isn't this available already, as the shell supports pipe creation,
> anyway?

With popen5, you can do it *without* using the shell. 


> >     - Universal newline support.
> 
> This should be merged into the existing code.

There's already a bug about this; bug 788035. This is what one of the 
comment says:

"But this whole popen{,2,3,4} section of posixmodule.c is so fiendishly
complicated with all the platform special cases that I'm loath to touch
it..."

I haven't checked if this is really true, though. 


> >     - A communicate() method, which makes it easy to send stdin data
> >       and read stdout and stderr data, without risking deadlocks.
> >       Most people are aware of the flow control issues involved with
> >       child process communication, but not all have the patience or
> >       skills to write a fully correct and deadlock-free select loop.
> 
> Isn't asyncore supposed to simplify that?

Probably not. The description says:

"This module provides the basic infrastructure for writing asynchronous
socket service clients and servers."

It's not obvious to me how this module could be use as a "shell backquote"  
replacement (which is what communicate() is about). It's probably possible
though; I haven't tried. Even if this is possible I guess we need some
kind of "entry" or "wrapper" method in the popen module to simplify things
for the user. My guess is that an communicate() method that uses asyncore
would be as long/complicated as the current implementation. The current 
implementation is only 68 lines, including comments. 


> So in short, I'm -1 on creating a new module, but +1 on merging
> most of these features into the existing code base - they are good
> features.

Well, I don't see how this could be done easily: The current API is not 
flexible enough, and some things (like cross-process exceptions) breaks 
compatibility. 

Writing a good popen module is hard. Providing cross-platform support (for 
Windows, for example) is even harder. Trying to retrofit a good popen 
implementation into an old API without breaking compatibility seems 
impossible to me. I'm not prepared to try. 


-- 
/Peter ?strand <astrand at lysator.liu.se>










From peter at engcorp.com  Mon Jan 26 17:27:57 2004
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 26 Jan 2004 17:27:57 -0500
Subject: TELNET instead PING
References: <5f505344.0401260332.184d4225@posting.google.com>
	<401571B9.F9DF99D0@engcorp.com>
	<mailman.807.1075148925.12720.python-list@python.org>
Message-ID: <4015946D.B2A218BA@engcorp.com>

> Gandalf wrote:
> 
> I think there is no universal way to determine if a remote host is alive or not.

That is definitely the case, because of course the firewall could just as
easily block all traffic that is not from a specific IP address as well.

-Peter


From miki.tebeka at zoran.com  Sun Jan 18 10:51:38 2004
From: miki.tebeka at zoran.com (Miki Tebeka)
Date: 18 Jan 2004 07:51:38 -0800
Subject: re question - finiding matching ()
Message-ID: <4f0a9fdb.0401180751.4b66d974@posting.google.com>

Hello All,

To all of you regexp gurus out there...

I'd like to find all of the sub strings in the form "add(.*)"
The catch is that I might have () in the string (e.g. "add((2 * 2), 100)"), 

Currently I can only get the "addr((2 *2)" using re.compile("\w+\([^\)]*\)"). 
To solve the problem a hand crafted search is used :-(

Is there a better way?

Thanks.
Miki


From boomer4467 at yahoo.com  Sat Jan  3 15:49:56 2004
From: boomer4467 at yahoo.com (Boomer)
Date: 3 Jan 2004 12:49:56 -0800
Subject: importing
Message-ID: <231bc96c.0401031249.12cff6d7@posting.google.com>

Hi all,
    I'm new to python which explains my problems with this. I'm trying
to import a .csv file(from excel) into some fields on my company's
software system(which interfaces to an sql database. Each row in this
.csv file needs to be split into smaller strings and each respective
string applied to it's field in the software then it's saved and the
next row starts, here's the code I've come up with so far.

f=open ("book1.csv", "r")
s=f.readline ()
while s != "":
  print s
  l = s.split(s,",",(11))
  PlayIt.SetFieldContent ("SY012M1", "art-nr", l[0])
  PlayIt.PlayContent ("{CSB SY012M1|art-nr}{Enter}")
  PlayIt.SetFieldContent ("SY012ADM1", "001bez",  l[1])
  PlayIt.SetFieldContent ("SY012ADM1", "005agr",  l[2])
  PlayIt.SetFieldContent ("SY012ADM1", "006agr",  l[3])
  PlayIt.SetFieldContent ("SY012ADM1", "009kst",  l[4])
  PlayIt.SetFieldContent ("SY012EHM1", "005laeh",  l[5])
  PlayIt.SetFieldContent ("SY012EHM1", "006lauf",   l[6])
  PlayIt.SetFieldContent ("SY012EHM1", "011vkuf",   l[7])
  PlayIt.SetFieldContent ("SY012SDM1", "012fest",   l[8])
  PlayIt.SetFieldContent ("SY012PRM1", "001tpr",   l[9])
  PlayIt.SetFieldContent ("SY012PRM1", "002wpr",   l[10])
  PlayIt.SetFieldContent ("SY012PRM1", "003plpr",   l[11])
  PlayIt.PlayContent ("{CSB SY012M1|art-nr}{F2}")
  s=f.readline ()
f.close ()

here's the error

Traceback (innermost last):
  File "<string>", line 5, in ?
AttributeError: 'string' object has no attribute 'split'

the furthest I get is when I remove the s.split all together then I
can actually watch it import the first field correctly and switch
focus to the second field where it prints a comma and then hangs and
eventually gives the
argument 3: expected string list found
Someone told me I need to import the string module using "import
string" somewhere in my code, but when I do this I get an error
stating that no such module exists. I run this as script inside a
macro from another program and I believe the version of python this
program uses is 2.2.1.

Does anyone have any ideas? Any help would be wonderful!!!


From francisgavila at yahoo.com  Mon Jan 12 11:09:50 2004
From: francisgavila at yahoo.com (Francis Avila)
Date: Mon, 12 Jan 2004 11:09:50 -0500
Subject: Python installation breaks Outlook Express
References: <ikn30011doe8o972u0d67j1dvrjs2si1v8@4ax.com>
	<c718a6cf.0401112108.66968e7a@posting.google.com>
Message-ID: <1005hodg7nqu129@corp.supernews.com>

Y2KYZFR1 wrote in message ...
>This has nothing to do with Python and posting the same question over
>and over will not get a different answer.

No need to be rude....
-- 
Francis Avila


From tim.golden at viacom-outdoor.co.uk  Wed Jan 21 09:29:45 2004
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Wed, 21 Jan 2004 14:29:45 -0000
Subject: Dailing modem.
Message-ID: <F1921F85572CB04D9F55B14BDC76B3E4434641@tdi_nt9.internal.viacom-outdoor.co.uk>

> I need to dail a modem from python and disconnect it again. 

Assuming you're on Windows (since you're talking about TAPI & COM)
look at the win32ras module in Mark Hammond's win32 extensions.

TJG


________________________________________________________________________
This e-mail has been scanned for all viruses by Star Internet. The
service is powered by MessageLabs. For more information on a proactive
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From python-list at cstork.org  Wed Jan 21 18:03:44 2004
From: python-list at cstork.org (Christian Stork)
Date: Wed, 21 Jan 2004 15:03:44 -0800
Subject: Weaver/Yarn Pattern in Python
In-Reply-To: <400E4559.3020704@prescod.net>
References: <20040121062432.GA6158@ics.uci.edu> <400E4559.3020704@prescod.net>
Message-ID: <20040121230344.GA11614@ics.uci.edu>

Hi Paul,

On Wed, Jan 21, 2004 at 01:24:41AM -0800, Paul Prescod wrote:
> I've tried to understand your problem statement in detail but it is alot 
> to keep in the head in pure abstraction (i.e. I don't have your specific 
> problem and haven't worked on this complicated a tree walker in a while 
> if ever). Also, I think there may have been some typos that are making 
> it harder to understand. For instance, is visitB supposed to be 
> syntactically identical to visitA except it calls weaveB's instead of 
> weaveA's? 

I'm sorry that's a typo. :-(  Corrections follow below in context...

> Is this the boilerplate that offends you?

The boilerplate *and* the unnatural name mangling.  I guess only some
kind of generic function simulation could help me with that one. ;-)
(If anybody is interested I could try and come up with a minimal version
of my problem in Dylan using generic functions.)

> But maybe I can help anyhow. Here's some code from your post:
> 
> > class Weaver:
> >     "A special visitor which weaves yarns"
> >     def __init__(self, yarns):
> >         self.yarns = yarns
> >     def visitA(self, a):
> >         for y in self.yarns:
> >             y.weaveA_First(a)
> >         for i, k in enumerate(a.kids):
> >             for y in self.yarns:
> >                 y.weaveA_Before(a, i)
> >             k.accept(self)
> >             for y in self.yarns:
> >                 y.weaveA_After(a, i)
> >         for y in self.yarns:
> >             y.weaveA_First(a)
                         Last
> >     def visitB(self, b):
> >         for y in self.yarns:
> >             y.weaveA_First(b)
                       B
> >         for y in self.yarns:
> >             y.weaveA_First(b)
                       B
Above is what I meant.  Cut-n-paste typos :(

> I'm going to presume that visitB was supposed to be more like:
> 
> >     def visitB(self, b):
> >         for y in self.yarns:
> >             y.weaveB_First(b)
> >            ... identical to visitA except A's swapped for B's ...
> 
> If it isn't identical to visitA (except for the B) then I don't know 
> what the boilerplate is. 

Well, I didn't intend it to be identical.  I meant to leave out the
Before and After methods, but your assumption makes a lot of sense given
how I presented my problem.  :-)  

In actuality, things are a bit more complicated.  Nodes are of different
kinds.  These kinds are defined by a tree grammar.  (You can find more
about this in my papers at my home page (see sig).)  Anyway, as an
example one kind of node might have exactly 3 kids with names K1, K2,
K3, and it makes sense to refer to them by these names.  Therefore I
have method signatures like

class SomeYarn:
    ...
    def weaveN_Before_K2(self, k2): # here k2 is the actual kid, not an index
         ...

This is slightly more convenient and has the big advantage that this
code is still correct after changing the order of kids in the tree
(which happend several times).

Now, in the case of node classes B and C, they did not have any children
according to their node kind.  That's why I didn't list the appropriate
methods.  But I like the (relative) simplicity of your below proposal.
So maybe I cut back on some of the convenience features and use a scheme
like yours.

...
> If I'm understanding right, I think each yarn has a two-D matrix of methods:
> 
>           A        B          C        D  ....
> First
> Before
> After
> Last
> 
> And then you've got another dimension for the yarns (that varies at runtime)
> 
> There are many ways to represent these axes in Python:
> 
> self.yarns[0]["A"]["First"]
> self.yarns[0]["A", "First"]
> self.yarns[0]["A_First"]
> self.yarns[0]["A"].First()

Nice and clean solutions.  Definitely better than my mangling.  

> class Weaver:
>     "A special visitor which weaves yarns"
>     def __init__(self, yarns):
>          self.yarns = yarns
>     def visit(self, a):
>          for y in self.yarns:
>              y.threads[a.type].First(a)
>          for i, k in enumerate(a.kids):
>              for y in self.yarns:
>                  y.threads[a.type].Before(a, i)
>              k.accept(self)
>              for y in self.yarns:
>                  y.threads[a.type].After(a, i)
>          for y in self.yarns:
>              y.threads[a.type].Last(a)

By now I made one addition to my weaver's visit method:
Don't require that all yarn code snippets are present -- just fall back
on some default behavior.  In our case that means to do nothing.

This change allows to reduce the boilerplate of yarns to a degree where
I can look at a yarn's definition and immediatly see the non-boilerplate
code.  (Nothing big, but it helps.)

...
> class X_Yarn_A_thread:
>       self.type == "A"
>       def First(self, arg):
>               assert arg.type == self.type
>               return self.first(arg)
> 
>       def Before(self, arg):
>               assert arg.type == self.type
>               return self.before(arg)
...

Makes sense.  Adds a little to the boilerplate tho.

> Hacking together method names with strings is only ever a sort of 
> syntactic sugar for some other design that uses dictionaries "properly". 
>
> Remember that Python has at its core a similar feature set to Scheme and 
> Lisp which are famously "flexible" and "powerful" and yet do not do any 
> name manging weirdness. It's great that Python allows that name manging 
> stuff but if you feel you HAVE to use it then you probably aren't 
> thinking in terms of higher order functions or objects in contrainers as 
> you could/should. You should think about hwo to do things without 
> method-name hacking before deciding that that's a better solution for 
> some reason of expedience or usability.

True.

Thanks a lot for help and discussion,
Chris

-- 
Chris Stork   <>  Support eff.org!  <>   http://www.ics.uci.edu/~cstork/
OpenPGP fingerprint:  B08B 602C C806 C492 D069  021E 41F3 8C8D 50F9 CA2F



From gerrit at nl.linux.org  Sat Jan  3 05:17:34 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Sat, 3 Jan 2004 11:17:34 +0100
Subject: Filename type (Was: Re: finding file size)
In-Reply-To: <bt3l9i$pog$07$3@news.t-online.com>
References: <4V4Jb.12709$Vl6.2811218@news20.bellglobal.com>
	<bt3l9i$pog$07$3@news.t-online.com>
Message-ID: <20040103101734.GA29993@nl.linux.org>

Hi,

I propose to add a "filename" type to Python.

Martin v. Loewis wrote:
> Sean Ross wrote:
> >My question is this: Is there a reason why file objects could not have a
> >size method or property?
> 
> Yes. In Python, file objects belong to the larger category of "file-like
> objects", and not all file-like objects have the inherent notion of a 
> size. E.g. what would you think sys.stdin.size should return (which
> actually is a proper file object - not just file-like)?

A different solution to this problem would be to introduce "filename"
type to Python, a subclass of str. The "name" attribute of file would be of this
type. This type would inherit a lot of os.path stuff: getsize becomes
simpler, more readable, and more object oriented, as do other os.path
functions. I think the alternatives look a lot more prety:

OLD                                         NEW
os.path.realpath(fn)                        fn.realpath()
os.path.getmtime(fp.name)                   fp.name.getmtime()
os.path.ismount(os.path.dirname(fp.name))   fp.name.dirname().ismount()

It's more beatiful, simpler, flatter (#3), practical, obvious, easy.

problem: what do do with os.path constants?
solution: make them class attributes
problem: how to handle posixpath, ntpath, macpath?
solution: abstract Path class with NTPath, MacPath, PosixPath sublasses which is the actual type of e.g. fn.name on a certain platform
problem: backwards compatibility
solution: same as string methods
problem: "/dev/null" reads as a Path but is a str
solution: path("/dev/null") is a little more typing for a lot more luxery
problem: what to do with commonprefix?
solution: don't know
problem: what to do with os.path.walk?
solution: use os.walk instead
problem: what to do with sameopenfile?
solution: make it a file method
problem: what to do with join, split?
solution: rename to joinpath, splitpath.

Any comments?

yours,
Gerrit.

-- 
158. If any one be surprised after his father with his chief wife, who
has borne children, he shall be driven out of his father's house.
          -- 1780 BC, Hammurabi, Code of Law
-- 
Asperger's Syndrome - a personal approach:
	http://people.nl.linux.org/~gerrit/english/



From Robert.Schmitt at cellzome.com  Mon Jan 26 05:51:22 2004
From: Robert.Schmitt at cellzome.com (Robert.Schmitt at cellzome.com)
Date: Mon, 26 Jan 2004 11:51:22 +0100
Subject: logging package problems
Message-ID: <OFF8132B9B.9DC5A888-ONC1256E27.0038BE9F-C1256E27.003BACE6@cellzome.de>

I found that the configuration system of the new logging package of Python 
2.3 has some 
unintuitive idiosyncracies that are worth mentioning because they can cost 
you quite some 
development time and are not documented elsewhere.

I used the logging configuration file shown below. My aim was to log only 
the INFO messages,
but log DEBUG messages for one particular module (called webTestLogin.py).

Here's what I found out:
- if your init logging in your module with the line
        log = logging.getLogger()
  then the logging module will determine the module where the call 
originated and in your log files
  you'll find lines like
        2004-01-26 11:21:15,890 [INFO] creating ticket for this session 
[in webtestlogin]
  where webTestLogin mysteriously lost its capitalization. Now, this does 
*not* mean that
  webtestlogin will also be the 'qualname', i.e. the name of a channel 
that you can use
  to log messages from this module to a different place or in a different 
manner; for that
  to work, you'll need the following line of code:
        log = logging.getLogger('webtestlogin')
  (making 'webtestlogin' a channel, or some sort of logical logging unit 
that allow its calls to be handled
  differently from the other log calls in your program).
  The documentation says qualname is the 'fully qualified name', but 
doesn't contend on what
  that is; I tried the complete package name, that didn't work 
('com.cellzome.pandora.webTestLogin').
- capitalization *is* very important; if you use lowercase in the code, 
you'll need lowercase
  in the logging config file as well (see the qualname line below)
- 'propagate' forwards log messages to other loggers, so you may e.g. log 
the same line to
  two different places - so far so good. But: If you set propagate to 1 in 
the [logger_webtestlogin]
  shown below, the root logger will log DEBUG messages too, even though it 
was told to log
  only INFO - just because the message has been forwarded (?!?)
  Generally I think that propagation follows the order of the loggers, but 
I still don't get the
  complete picture.
- the config file scanner/parser is not very robust; if you use spaces in 
a list for aesthetic reasons
  (e.g. keys=root, webtestlogin) the key list will be ('root', ' 
webtestlogin'). This can produce
  quite esoteric errors :-)

Maybe I didn't get the point/purpose of the framework on some of those 
issues, but
then again it might be worth to extend the existing documentation a bit.

Cheers,

Robert F Schmitt, Cellzome AG
Meyerhofstr. 1, D-69117 Heidelberg, Germany
Tel + 49 6221 137 57 405, Fax + 49 6221 137 57 202
www.cellzome.de
------------------------------------------------------------------------------------
The vast majority of our imports come from outside the country."
- George W. Bush

"If we don't succeed, we run the risk of failure."
- George W. Bush

///////////////////////////////////////////////////////////////////
///////////////           config file             ///////////////
///////////////////////////////////////////////////////////////////

###########################################################
# general references

[loggers]
keys=root,webtestlogin

[handlers]
keys=drogenHandler,stdoutHandler

[formatters]
keys=taschenFormat,textOnlyFormat

###########################################################
# loggers

[logger_webtestlogin]
level=DEBUG
handlers=drogenHandler,stdoutHandler
propagate=0
qualname=webtestlogin

[logger_root]
level=INFO
handlers=drogenHandler,stdoutHandler
propagate=1

###########################################################
# handlers

[handler_drogenHandler]
class=FileHandler
level=NOTSET
formatter=taschenFormat
args=('pandora.log', 'w')

[handler_stdoutHandler]
class=StreamHandler
level=INFO
formatter=textOnlyFormat
args=(sys.stdout,)

###########################################################
# formatters

[formatter_taschenFormat]
format=%(asctime)s [%(levelname)s] %(message)s [in %(module)s]

[formatter_textOnlyFormat]
format=%(levelname)s %(message)s

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From gagenellina at softlab.com.ar  Fri Jan  2 20:40:53 2004
From: gagenellina at softlab.com.ar (Gabriel Genellina)
Date: Fri, 02 Jan 2004 22:40:53 -0300
Subject: Debugging a script
In-Reply-To: <prkJb.76$tS3.23@news-binary.blueyonder.co.uk>
Message-ID: <5.2.1.1.0.20040102223740.0242b550@192.168.0.115>

At 2/1/2004 20:23, you wrote:

>I've got a (python) program which crashes.  WHat I'd like to do is something
>loke this:
>
>         try:
>                 lots of stuff, or
>                 more pertinintly, the code which is failing
>         except:
>                 drop in to the debugger
>
>So that I can print various things.
>
>Also, is there a way to display the line number  - eg:
>         except something:
>                 print ("DEBUG: exception %s at line number %s" % 
> (sys.exc_type,
>sys.linenumber))

Better to print a full traceback instead of just one line number. Look at 
the traceback module:

         except:
                 import traceback
                 traceback.print_exc()



Gabriel Genellina
Softlab SRL




From irmen at -NOSPAM-REMOVETHIS-xs4all.nl  Sun Jan 18 10:18:58 2004
From: irmen at -NOSPAM-REMOVETHIS-xs4all.nl (Irmen de Jong)
Date: Sun, 18 Jan 2004 16:18:58 +0100
Subject: Problems creating mail content using email.MIMEText, non-ASCII
 encoding
In-Reply-To: <4005c2ab$0$321$e4fe514c@news.xs4all.nl>
References: <4005c2ab$0$321$e4fe514c@news.xs4all.nl>
Message-ID: <400aa3e5$0$329$e4fe514c@news.xs4all.nl>

I wrote:

> I'm trying to create e-mail content using the email.MIMEText module.
> It basically works, until I tried to send mail in non-ascii format.

[...]

> The first one in iso-8859-15 format looks okay but is in quoted-printable,
> and either my mail clients are wrong (unlikely, I've never had this kind
> of problems with them) or the content is wrong, because what
> I'm seeing this in Mozilla mail and my webmail client:
>    "body text including an Euro char  AC"         (a space before 'AC'!)
> 
> My UTF-8 attempt failed totally as you can see.

I solved it.

First, I concluded that you have to encode the message body yourself
before putting it in the MIMEText object. So I now encode my
unicode message body like this:
mail=MIMEText(body.encode('iso-8859-15','replace'), _charset='iso-8859-15')

Also, I had to override the default 'utf-8' email.Charset to
avoid having the message body encoded in base-64 when using utf-8:

import email.Charset
email.Charset.add_charset( 'utf-8', email.Charset.SHORTEST, None, None )

The resulting emails and headers look very similar to what Mozilla Mail
is generating, and the received emails display well. I'm happy :)

--Irmen


From teengo at yahoo.com  Mon Jan 12 22:03:43 2004
From: teengo at yahoo.com (Ticachua)
Date: 12 Jan 2004 19:03:43 -0800
Subject: How to intercept a keypress using python?
References: <ae453155.0401120950.39f16df8@posting.google.com>
	<pan.2004.01.12.20.20.55.580426@yahoo.com>
Message-ID: <ae453155.0401121903.5c97a46b@posting.google.com>

Samuel Walters <swalters_usenet at yahoo.com> wrote in message news:<pan.2004.01.12.20.20.55.580426 at yahoo.com>...
> |Thus Spake Ticachua On the now historical date of Mon, 12 Jan 2004
> 09:50:38 -0800|
> 
> > Hello all,
> > 
> > Does anyone know how to intercept user's keypress or mouseclick in Python?
> > I'd like to write a small tool (Python-based preferrably) running on
> > Windows to capture the user's keypresses and mouseclicks and write them to
> > a file.
> > 
> > Thanks for your help.
> 
> Some people in alt.2600 and alt.crackers will certainly know where to find
> such tools.  Have you asked there?

Thanks Samuel. I'll try those groups.


From fuf at mageo.cz  Wed Jan 28 13:40:40 2004
From: fuf at mageo.cz (Michal Vitecek)
Date: Wed, 28 Jan 2004 19:40:40 +0100
Subject: C API: how to tell if x is a new style instance?
Message-ID: <20040128184040.GD11485@foof.i3.cz>

 hello everyone,

 i've tried to find a way to determine in the python C-API if x is an
 instance of a (damned) new style class, but failed :/

 can someone please tell me how this could be accomplished?

        thank you,
-- 
		fuf		(fuf at mageo.cz)



From aahz at pythoncraft.com  Wed Jan 21 20:01:11 2004
From: aahz at pythoncraft.com (Aahz)
Date: 21 Jan 2004 20:01:11 -0500
Subject: Accessing a shared generator from multiple threads.
References: <7934d084.0401152058.164a240c@posting.google.com>
	<400AB936.BA1D9D73@hotmail.com>
	<7934d084.0401181805.71029c2f@posting.google.com>
	<400EE6B5.27C6B694@hotmail.com>
Message-ID: <bun7cn$le7$1@panix1.panix.com>

In article <400EE6B5.27C6B694 at hotmail.com>,
Alan Kennedy  <alanmk at hotmail.com> wrote:
>
>Yes, you're right. Using a Queue in this situation does require the
>use of a dedicated thread for the producer. There is no way to "pull"
>values from a generator to multiple consumers through a Queue.Queue.
>The values have to be "pushed" onto the Queue.Queue by some producing
>thread of execution.

Correct.

>The way I see it, the options are  
>
>Option 1. Spawn a separate thread to execute the producing generator.
>However, this has problems:-
>
>A: How do the threads recognise the end of the generated sequence?
>This is not a simple problem: the Queue simply being empty does not
>necessarily signify the end of the sequence (e.g., the producer thread
>might not be getting its fair share of CPU time).
>
>B: The Queue acts as a (potentially infinite) buffer for the generated
>values, thus eliminating one of the primary benefits of generators:
>their efficient "generate when required" nature. This can be helped
>somewhat by limiting the number of entries in the Queue, but it is
>still slightly unsatisfactory.
>
>C: A thread of execution has to be dedicated to the producer, thus
>consuming resources.

There are a number of ways of mitigating A and B; they mostly involve
using an extra Queue.Queue to send tokens to the generator thread when a
consumer wants data.  The generator thread then sends back a token that
(among other things) contains an attribute specifically for notifying
the consumer that the generator is exhausted.  See
http://www.pythoncraft.com/OSCON2001/ThreadPoolSpider.py
and
http://www.pythoncraft.com/OSCON2001/FibThreaded.py
for examples that show the technique, though they're not directly
relevant to this case.

My point is that I haven't (yet) seen many good use cases for sharing a
generator between threads, and I'm guessing that many people will try
using generators inappropriately for problems that really are better
suited to Queue.Queue.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

A: No.
Q: Is top-posting okay?


From rodrigob at elo.utfsm.cl  Mon Jan 26 15:49:06 2004
From: rodrigob at elo.utfsm.cl (Rodrigo Benenson)
Date: Mon, 26 Jan 2004 17:49:06 -0300
Subject: part string to block of information
References: <bv3rro$mp6$1@nsnmrro2-gest.nuria.telefonica-data.net>
Message-ID: <4015796b$1_1@nova.entelchile.net>

convert the string to a known encoding (or binary format), where each char
has fixed size and play with the lenght.

"Jos? Carlos" <josecarlos at siadv.com> escribi? en el mensaje
news:bv3rro$mp6$1 at nsnmrro2-gest.nuria.telefonica-data.net...
> Hi.
>
> How can i part a big string to block of information of (4Kb for example).?
> i?m trying send it from a socket client to server and how can i calculate
> the time it?s coming.
>
> Thank you.
>
> Regards.
>
> Jos? Carlos
> www.siadv.com
>
>
>




From newsgroups at jhrothjr.com  Thu Jan  8 17:28:02 2004
From: newsgroups at jhrothjr.com (John Roth)
Date: Thu, 8 Jan 2004 17:28:02 -0500
Subject: Descriptor puzzlement
References: <mailman.191.1073577858.12720.python-list@python.org>
Message-ID: <vvrmdve4p44423@news.supernews.com>


"Robert Brewer" <fumanchu at amor.org> wrote in message
news:mailman.191.1073577858.12720.python-list at python.org...
Peter Otten wrote:
> John Roth wrote:
> > It doesn't look like the descriptor protocol is getting
> > invoked at all.
>
> The descriptor protocol works on the class, not the instance, so
>
> class AnotherObject(object):
>     prop = AnObject("snafu")
>
> or something similar should work. This means in particular
> that you have to
> store the property's state in the AnotherObject rather than
> the AnObject
> instance.

I got bit by this myself, a while ago. Would there be any benefit to
providing something like what John wanted, where the descriptor can
maintain its own state, and be referenced by the owner instance (instead
of the owner class)? I could sure use it in a couple of spots where my
__getattr__/__setattr__ code is getting ugly.


[reply by John Roth]
Interesting thought. What was in the back of my mind for
this experiment was the ability to insert metadata in the
descriptor. I'm still not sure I can do that. I found I couldn't
do it with the property descriptor (at least the experiment I
tried failed, but now that I think of it I might have attempted
it from the instance rather than the class.)

John Roth

Robert Brewer
MIS
Amor Ministries
fumanchu at amor.org




From http  Thu Jan  8 21:30:50 2004
From: http (Paul Rubin)
Date: 08 Jan 2004 18:30:50 -0800
Subject: Pesky reverse()
References: <3t3svvs7ni8l8jnn1l1v60oogirqoaa85f@4ax.com>
Message-ID: <7xfzep6eg5.fsf@ruckus.brouhaha.com>

engsolnom at ipns.com writes:
> print my_list.reverse()  doesn't work.

The reverse() method reverses the list in place and returns None.

> But  I want both a 'forward' and 'reverse' list:
> 
> new_list = my_list  # should save a 'forward' copy, right? Nope

No, both new_list and my_list are bound to the same list, like in C
you might have two pointers to the same structure.  To make a copy, use

   new_list = my_list[:]

> my_list.reverse() actually reverses both copies, since Python is a bit too
> helpful sometimes, and I understand why.
> 
> So the question is, how do I get a forward and reverse list?

   new_list = my_list[:]
   new_list.reverse()


From robin at jessikat.fsnet.co.uk  Wed Jan 21 13:00:07 2004
From: robin at jessikat.fsnet.co.uk (Robin Becker)
Date: Wed, 21 Jan 2004 18:00:07 +0000
Subject: ReportLab 1.19 Released
Message-ID: <jvHZstAn4rDAFwUV@jessikat.fsnet.co.uk>

Version 1.19 of the ReportLab Toolkit has been released.
Fixes from Max Neunh?ffer (pyRXP) and Peter Borocz (pdfmetrics).
ReportLab graphics now has some 3D charts.
Support for True Type Fonts in renderPM.
Henning von Bargen's LongTables optimisation.
Marc Stober's underline fixes.
Restored/improved platypus layout error detection.
New platypus FlexFigure flowable.
ReportLab is now mostly jython compatible, but Python-2.3 no longer
gives warnings.
Pythonpoint improvements.
Many bugfixes.


ReportLab Links
http://www.reportlab.com
http://www.reportlab.org/downloads.html
http://sourceforge.net/projects/reportlab
-- 
Robin Becker


From reply.in.the.newsgroup at my.address.is.invalid  Sat Jan  3 18:16:22 2004
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Sun, 04 Jan 2004 00:16:22 +0100
Subject: Cheetah best for templating?
References: <CMudnfQnOeIn1GqiRVn-uQ@comcast.com>
Message-ID: <g3jevv8h0rpl09r3kql9t1eehooujdft64@4ax.com>

Roger Jack:
>Is Cheetah the best tool to use for templating source code files 
>and then generating code?

I've choosen it for a project recently and IMO it's a good templating
system.

It would be good to get a little more guidance for using it in an easy
PHP-way with mod_python, but other than that I have no gripes.

-- 
Ren? Pijlman


From diego.andrade at smartech.com.br  Fri Jan  9 13:27:11 2004
From: diego.andrade at smartech.com.br (Diego.andrade)
Date: Fri, 9 Jan 2004 15:27:11 -0300
Subject: Tcl/Tk Support
Message-ID: <E1Af0F7-0003lB-L4@mail.python.org>

Hi,

Im not a Python programer, but I need to use Python on some aplications CVS
related. Im trying to install ViewCVS who need Tkinter library. But It
doesnt Work. Im using RedHat 9 Default Installation, to test if Tcl/Tk
suport for Python is working I Type in the Python console import tkinter and
received the following output:

[root at Diego-Linux root]# python
Python 2.2.2 (#1, Feb 24 2003, 19:13:11)
[GCC 3.2.2 20030222 (Red Hat Linux 3.2.2-4)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import tkinter
Traceback (most recent call last):
File "<stdin>", line 1, in ?
ImportError: No module named tkinter
>>>

Im searching over the Python.org for a explanation of what I have to do but
with no sucess...

Thanks for help.

Diego.

________________________________________________
Message sent using UebiMiau 2.7.2




From zunbeltz at wm.lc.ehu.es.XXX  Fri Jan  9 07:25:59 2004
From: zunbeltz at wm.lc.ehu.es.XXX (Zunbeltz Izaola)
Date: 09 Jan 2004 13:25:59 +0100
Subject: __init__, __slot__ and **keywordargs
References: <m1fzep36xi.fsf@lcpxdf.wm.lc.ehu.es>
	<btluap$89d$01$1@news.t-online.com>
Message-ID: <m1brpd2trc.fsf@lcpxdf.wm.lc.ehu.es>

Peter Otten <__peter__ at web.de> writes:

> 
> You misspelt: in fact it's __slots__, and it will work as expected. As far

Hurg!!! :-( This kine of mistakes will become me crazy. 

> as I know slots are an optimization technique that is useful to save some
> space, when you have many (that would be millions) of small objects. It's
> not meant as a safety belt for the programmer.

But, I think it can be considered "a safety belt for the programmer" ,
When you do

instance.attribute

you get and AttributeError if attribute is not in the __slots__
(It would help to avoid misspells, like i've done!!)

> In your case, I wouldn't use it, but rather not initialize the attributes
> not given as constructor - __init__() - arguments. Also, I would consider
> the ability to provide additional arguments, say "Nickname", not a
> bug but

What do you mean with additional arguments? (My code was not the full
code)

> a feature. Of course you have to change your client code to test for
> 

Not yet :-) I'm in planning stage yet and this code was only to play a
bit to see what can i do.

> hasattr(person, "Birthday") 
> 
> instead of 
> 
> person.Birthday is None
> 

Thanks for this suggestion, I think i'll use hasattr.

Zunbeltz

> Peter
> 
> 

-- 
Remove XXX from email: zunbeltz at wm.lc.ehu.esXXX


From tim.golden at viacom-outdoor.co.uk  Thu Jan 22 08:54:25 2004
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Thu, 22 Jan 2004 13:54:25 -0000
Subject: NetGetAnyDCName() - get PDC of a foreign WinNT-domain
Message-ID: <F1921F85572CB04D9F55B14BDC76B3E443464E@tdi_nt9.internal.viacom-outdoor.co.uk>

>Hi!
>
>I'm trying to get the PDC-Computername of a foreign WinNT-domain, but
>I only managed to get the PDC of my own domain with this code:
>pdc=win32net.NetGetAnyDCName()

If you don't specify any params to that call, win32net will assume
you're looking at your own domain. It can take two params: server & domain.

If you do this:

pdc = win32net.NetGetAnyDCName (None, "name_of_other_domain")

it should work.

TJG


________________________________________________________________________
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From randall at tnr.cc  Thu Jan  8 18:42:20 2004
From: randall at tnr.cc (Randall Smith)
Date: Thu, 08 Jan 2004 23:42:20 GMT
Subject: Python and SOAP
In-Reply-To: <67ce7525.0401081515.cdde341@posting.google.com>
References: <67ce7525.0401081515.cdde341@posting.google.com>
Message-ID: <wVlLb.7737$1F4.3154@fe2.texas.rr.com>

Download soappy

http://pywebsvcs.sourceforge.net/

Randall

JuiceMan wrote:
> Hi, i've been trying to access the my company's SOAP webservice with
> no luck.
> I'm using the httplib library.
> 
> This is my code:
> 
> 
> 
> from httplib import HTTP
> from urllib import quote
> 
> # Establish SOAP data
> 
> SOAPdata = '<?xml version="1.0" encoding="utf-8"?>'
> SOAPdata = '<soap:Envelope
> xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
> xmlns:xsd="http://www.w3.org/2001/XMLSchema"
> xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">'
> SOAPdata = SOAPdata + '\n  <soap:Body>'
> SOAPdata = SOAPdata + '\n    <checkPassword
> xmlns="COM.COAIR.WWW.Technology.CoWebServices.COWSEmployeeServiceCenter">'
> SOAPdata = SOAPdata + '\n      <employeeID>XXXXXX</employeeID>'
> SOAPdata = SOAPdata + '\n      <password>XXXXXX</password>'
> SOAPdata = SOAPdata + '\n      <accessCode>XXXXX</accessCode>'
> SOAPdata = SOAPdata + '\n    </checkPassword>'
> SOAPdata = SOAPdata + '\n  </soap:Body>'
> SOAPdata = SOAPdata + '\n</soap:Envelope>'
> 
> postdata = quote(SOAPdata)
> 
> 
> print "\n************************* OUTGOING SOAP
> ************************************"
> print postdata
> 
> # Begin HTTP request
> req = HTTP("insidecoair5")
> req.putrequest("POST",
> "/cowsemployeeservicecenter/cowsemployeeservicecenter.asmx")
> req.putheader("Accept", "text/xml; charset=utf-8")
> req.putheader("Content-Type", "text/xml; charset=utf-8")
> req.putheader("Content-Legth", str(len(postdata)))
> req.putheader("SOAPAction",
> "COM.COAIR.WWW.Technology.CoWebServices.COWSEmployeeServiceCenter/checkPassword")
> 
> req.endheaders()
> 
> # Send SOAP body
> req.send(postdata)
> 
> 
> ec, em, h = req.getreply()
> print "\n*************************** HTTP RESPONSE
> **********************************"
> print ec, em
> 
> print "\n*************************** HTTP HEADER RESPONSE
> ***************************"
> print h
> 
> # get file-like object from HTTP response
> # and print received HTML to screen
> fd = req.getfile()
> textlines = fd.read()
> fd.close()
> 
> print "\n************************** INCOMING SOAP
> ***********************************"
> print textlines
> 
> 
> I get back a faultstring with a "THe root element is missing" error
> 
> I cant seem to see what im doing wrong.  Any help would be greatly
> appreciated.



From gstein at lyra.org  Wed Jan 28 10:37:23 2004
From: gstein at lyra.org (gstein at lyra.org)
Date: Wed, 28 Jan 2004 07:37:23 -0800
Subject: received your email
Message-ID: <200401281537.i0SFbNlj023800@nebula.lyra.org>

Hi,

  [ Re: Hello ]

I have received your email, but it may take a while to respond. I'm really
sorry to have to hook up this auto-responder, as it is so impersonal.
However, I get a lot of email every day and find it very difficult to keep
up with it. Please be patient while I try to get to your message.

Please feel free to resend your message if you think I've missed it.

I'll always respond to personal email first. If your email is regarding some
of the software that I work on (if you have questions, comments,
suggestions, etc), then please resend it to the appropriate mailing list:

    mod_dav      <mailto:dav-dev at lyra.org>
    WebDAV       <mailto:w3c-dist-auth at w3.org>
    ViewCVS      <mailto:viewcvs at lyra.org>
    Subversion   <mailto:dev at subversion.tigris.org>
    edna         <mailto:edna at lyra.org>

Thank you!

Cheers,
-g

-- 
Greg Stein, http://www.lyra.org/



From xah at xahlee.org  Mon Jan 26 22:04:31 2004
From: xah at xahlee.org (Xah Lee)
Date: 26 Jan 2004 19:04:31 -0800
Subject: perl bug File::Basename and Perl's nature
References: <7fe97cc4.0401242131.22acf485@posting.google.com>
	<40136b6d@news.victoria.tc.ca>
	<7fe97cc4.0401260943.2442ba4e@posting.google.com>
	<bv3mga$leu$1@canopus.cc.umanitoba.ca>
Message-ID: <7fe97cc4.0401261904.4880149a@posting.google.com>

a correction to my previous post.

In my previous post i said one of the stupidity of Perl's
File::Basename module is that it requires user to tell it OS type.
This is incorrect.

Thanks to Walter Roberson (roberson at ibd.nrc-cnrc.gc.ca) for this
correction.

 Xah
 xah at xahlee.org
 http://xahlee.org/PageTwo_dir/more.html


From automator at no.spam.please.wowway.com  Tue Jan 20 19:47:53 2004
From: automator at no.spam.please.wowway.com (Tim O'Connell)
Date: Tue, 20 Jan 2004 19:47:53 -0500
Subject: CD Insert Notification in WinXP
Message-ID: <a5ednbL8y-KmUZDdRVn-uA@wideopenwest.com>

Hi,

I'm using Python 2.3 on a Win XP box, and I'm trying to find if there's 
a library of some sort that will give you a callback (or something 
comparable) when a new disc is inserted into a CD Rom drive. I've done a 
little googling and nothing's come up, so I'm not holding my breath. :)

If not, I'm thinking of implementing a thread to periodically read the 
volume serial number using GetVolumeInformation from Mark Hammond's Win 
32 extensions, then doing a compare against the last known value. Does 
this sound "sane"? Any recommendations would be useful.

Thanks!
Tim


From a at agni.us  Mon Jan 12 23:16:58 2004
From: a at agni.us (a at agni.us)
Date: Tue, 13 Jan 2004 04:16:58 GMT
Subject: Stackless and Discrete event Simulation
Message-ID: <_iKMb.157428$Dp5.77359@fe3.columbus.rr.com>

Can python community points out advantage and disadvantage of using
stackless python over python  for a discrete event simulation model? 


From graham__fawcett at hotmail.com  Mon Jan 12 13:52:33 2004
From: graham__fawcett at hotmail.com (Graham Fawcett)
Date: 12 Jan 2004 10:52:33 -0800
Subject: what is best for web development??
References: <f046efac.0401100358.5aa812a0@posting.google.com>
	<87wu80559x.fsf@blakie.riol>
	<f046efac.0401120330.5c2e7c50@posting.google.com>
	<87oet9grqy.fsf@blakie.riol>
Message-ID: <e9570f37.0401121052.ed79710@posting.google.com>

Wilk <wilkSPAM at OUTflibuste.net> wrote in message news:<87oet9grqy.fsf at blakie.riol>...
> ketulp_baroda at yahoo.com writes:
> 
> > The problem i am facing here is i dont know what to use for
> > development of the application. I came across many ways to develop web
> > application in python which I already specified like
> > i)the cgi module in python
> > ii)Python Server Pages
> > iii)Quixote
> > iv)WebWare
> > v)Zope etc.
> > I want to choose such an environment so that i dont have to install
> > other softwares to run my application.For eg. I think if I develop
> > using zope then the client also has to install zope to run my software
> > and i dont want this.
> 
> When you use one of theses servers, you don't need to install anything
> else than a classic browser on the client side.
> On the server side, most of the servers will not need anything else, you
> can even start without server with the batterie include :
> BasicHTTPServer (it was somes examples on this list somes days ago).

Just a guess, but I suspect the OP is using the term "client" in the
business sense, not the client/server sense; that is, he's trying to
write a Web application that is easy to deploy on his clients'
(customers') servers.

If it has to be a one-shot install, I would suggest a Web server
written in Python -- Medusa or Twisted, probably -- that you could
bundle with your Python app. Find a Web app framework that (a) works
on Medusa or Twisted and (b) has the templating features you
require/desire.

I wouldn't jump at using Twisted's app framework (Woven?) on top of
Twisted's Web server, though. No disrespect intended to the Twisted
community or their great body of work; it's just that server and
app-framework are two separate concerns: one day you might want to or
need to switch Web servers, and you need to know that your framework
is portable. I'm no Twisted expert: perhaps Woven is indeed portable,
and a kindly Twisted person will elaborate here.

-- Graham


From llothar at web.de  Thu Jan 15 01:12:37 2004
From: llothar at web.de (Lothar Scholz)
Date: 14 Jan 2004 22:12:37 -0800
Subject: what is best for web development??
References: <f046efac.0401100358.5aa812a0@posting.google.com>
	<87oet9grqy.fsf@blakie.riol>
	<e9570f37.0401121052.ed79710@posting.google.com>
	<6ee58e07.0401140638.672d50a7@posting.google.com>
	<100b4qoeeeq7d57@corp.supernews.com>
Message-ID: <6ee58e07.0401142212.424eea09@posting.google.com>

claird at lairds.com (Cameron Laird) wrote in message news:<100b4qoeeeq7d57 at corp.supernews.com>...
> 
> I'm unsure what you're recommending.  We're considering a self-contained
> Web application, including the Web server itself.  Are you proposing:
> 1.  An installer which does a conventional Apache 
>     installation, except with enough stuff confi-
>     gured so it comes up in a safe state, PLUS
>     a separate installation segment just for the
>     Python-based part; or
> 2.  A custom installer which knows internal details
>     of both Apache and the Python-based application?
> 
> What advantage do you see for either of these over the pure-Python ap-
> proach suggested above?  Is your point that customers feel more 
> comfortable with "Apache inside"?

I would use (2), simply because (1) could have influences with an
existing installation. I hate the window programs who install
apache/php and kill my machine (like Numegas PHPEd or Magumas older
version). Such an installation should never use the standart paths,
ports or anything else.

And yes "Apache inside" is a very good marketing argument. Apache has
proven to be robust to most of the denial of service attacks and if
there is a good administrator in the company he can update it easily
with security patches.

I found that companies that are sensitive to security issues try to
avoid home grown server as much as possible.


From __peter__ at web.de  Sun Jan 18 17:58:47 2004
From: __peter__ at web.de (Peter Otten)
Date: Sun, 18 Jan 2004 23:58:47 +0100
Subject: re question - finiding matching ()
References: <4f0a9fdb.0401180751.4b66d974@posting.google.com>
Message-ID: <buf2t1$jr1$03$1@news.t-online.com>

Miki Tebeka wrote:

> To all of you regexp gurus out there...

So not asking me, but anyway...

> I'd like to find all of the sub strings in the form "add(.*)"
> The catch is that I might have () in the string (e.g. "add((2 * 2),
> 100)"),
> 
> Currently I can only get the "addr((2 *2)" using
> re.compile("\w+\([^\)]*\)"). To solve the problem a hand crafted search is
> used :-(
> 
> Is there a better way?

Iff you are looking into Python code, you could also use the compiler
module. The following script scans itself for occurences of add() function
calls.

<example.py>
import compiler

def sample():
    """ add(xxx) <- will not be found """
    x.add(1) # <- will not be found
    add(a*(b+c))
    add(a, b)
    add()
    add((1*1),2)+add((2))

class Visitor:
    def visitCallFunc(self, node):
        if getattr(node.getChildren()[0], "name", None) == "add":
            print node

tree = compiler.parseFile(__file__)

compiler.visitor.walk(tree, Visitor())
</example.py>

Peter


From gduzan at bbn.com  Mon Jan 12 13:16:08 2004
From: gduzan at bbn.com (Gary D. Duzan)
Date: Mon, 12 Jan 2004 18:16:08 GMT
Subject: Why " ".some_string is often used ?
References: <Xns94698A5566736stefninnospamyahoofr@213.228.0.4>
	<vvqghojub1dl07@news.supernews.com>
	<WuqdnV9uUeebO2CiRVn-jw@comcast.com>
	<slrnbvtrsp.nh1.ramen@lackingtalent.com>
Message-ID: <IvBMb.31$6%6.24@news.level3.com>

In article <slrnbvtrsp.nh1.ramen at lackingtalent.com>,
Dave Benjamin  <ramen at lackingtalent.com> wrote:
>
>The argument is more of a technical issue. There are only two kinds of
>strings. There are many kinds of "iterables". So, it's easier to define
>"join" on the string, and force implementers of custom string types to
>implement "join" as well (since this is more rare) than to define "join" on
>an iterable and force implementers of the many kinds of iterables to define
>"join" as well. Conceptually, I'm not sure that the case is so strong that
>"join" is a string method.
>
> [ ... ]
>
>Sometimes, object-orientedness gets in the way, and I think this is one of
>those cases. "str.join" is probably the winner here, but since it's really
>just a string method being used "out of context", the delimeter is the first
>argument, and this doesn't read well to me. I think that "string.join" makes
>more sense; it says "join this sequence using this delimeter" instead of
>str.join's "join using this delimeter this sequence".

   Why not something really simple which does something like this?

def myjoin(seq,sep):
    def _addsep(l, r, s=sep): return l+s+r
    return reduce(_addsep, seq)

>>> myjoin(['a','b','c'], ",")
'a,b,c'
>>> myjoin(['a','b','c'], "")
'abc'
>>> myjoin([1,2,3,4], 0)
10
>>> myjoin("abcd", ',')
'a,b,c,d'

   It might not be the fastest, but it is straightforward and generic,
and could be optimized in C, if desired.

					Gary Duzan
					BBN Technologies
					A Verizon Company




From mark at mceahern.com  Sun Jan 18 14:39:57 2004
From: mark at mceahern.com (Mark McEahern)
Date: Sun, 18 Jan 2004 13:39:57 -0600
Subject: Printing variable names
In-Reply-To: <a6d1df44.0401181122.56f1f091@posting.google.com>
References: <a6d1df44.0401181122.56f1f091@posting.google.com>
Message-ID: <400AE10D.3080403@mceahern.com>

Mike wrote:

>mylist = [a, b, c]
>
>I want to print out the names of the variables in mylist (not the
>values of a, b, and c).  How do I go about doing this.  Thanks.
>
>Mike
>  
>
There's no simple answer to this.  Consider the fact that you can have 
more than one name bound to any given mutable instance.  What if:

  a = range(10)
  b = a

mylist = [a]

what name do you want printed for the first item in mylist--'a' or 'b'?

One idea is to use a dictionary instead.  Then:

for key, value in mydict.iteritems():
    print '%(key)s = %(value)s' % locals()

I'm curious what problem you're trying to solve.

Cheers,

// m



From tweedgeezer at hotmail.com  Mon Jan 26 11:42:11 2004
From: tweedgeezer at hotmail.com (Jeremy Fincher)
Date: 26 Jan 2004 08:42:11 -0800
Subject: unittest
References: <cthu12j9id5.fsf@lcpxdf.wm.lc.ehu.es>
Message-ID: <698f09f8.0401260842.6fc8a35c@posting.google.com>

Change your method name to begin with "test" instead of "Test" and it should work.

Jeremy


From michael at telcopartners.com  Thu Jan 15 01:53:54 2004
From: michael at telcopartners.com (Michael Spencer)
Date: 14 Jan 2004 22:53:54 -0800
Subject: Tkinter.Text.edit_modified() TypeError
Message-ID: <502a6f2c.0401142253.5e028471@posting.google.com>

Using: 
Python 2.3.3
Tkinter.TclVersion = 8.4000000000000004
Windows XP

Calling edit_modified() on a Tkinter.Text object raises TypeError when
it gets a Boolean True response.

Exception in Tkinter callback
Traceback (most recent call last):
  File "D:\Python23\lib\lib-tk\Tkinter.py", line 1345, in __call__
    return self.func(*args)
  File "\\Cc1040907-a\c$\Documents and Settings\Michael\My
Documents\PyDev\GUI\T
Egui.py", line 64, in <lambda>
    command = lambda tag = maketag(i), label =
label:menudispatch(label,tag))
  File "\\Cc1040907-a\c$\Documents and Settings\Michael\My
Documents\PyDev\GUI\T
Egui.py", line 27, in menudispatch
    return func()
  File "\\Cc1040907-a\c$\Documents and Settings\Michael\My
Documents\PyDev\GUI\T
Egui.py", line 49, in handle_File_Close
    if tbx1.edit("modified"):
  File "D:\Python23\lib\lib-tk\Tkinter.py", line 2819, in edit
    return self._getints(
  File "D:\Python23\lib\lib-tk\Tkinter.py", line 972, in _getints
    return tuple(map(getint, self.tk.splitlist(string)))
TypeError: coercing to Unicode: need string or buffer, bool found


From usenet_spam at janc.invalid  Fri Jan  9 17:06:11 2004
From: usenet_spam at janc.invalid (JanC)
Date: Fri, 09 Jan 2004 22:06:11 GMT
Subject: Python is far from a top performer according to benchmark
	test...
References: <ryELb.238$tK2.228@amstwist00>
	<mailman.243.1073684297.12720.python-list@python.org>
Message-ID: <Xns946BEB042697JanC@213.119.4.35>

Tim Churches <tchur at optushome.com.au> schreef:

> I notice that the author of those benchmarks, Christopher W.
> Cowell-Shah, has a PhD in philosophy. Perhaps Python's very own
> philosophy PhD, David Mertz, might like to repeat the benchmarking
> exercise for one of his columns, but including manipulation of more
> realistic data structures such as lists, arrays and dictionaries, as
> Carl suggests.

And then don't forget to publish it on /. or nobody sees it...  ;-)

-- 
JanC

"Be strict when sending and tolerant when receiving."
RFC 1958 - Architectural Principles of the Internet - section 3.9


From jcarlson at nospam.uci.edu  Thu Jan 22 22:25:16 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Thu, 22 Jan 2004 19:25:16 -0800
Subject: I support PEP 326
In-Reply-To: <qnky8rzid3y.fsf@arbutus.physics.mcmaster.ca>
References: <mailman.654.1074788734.12720.python-list@python.org>
	<401081A1.E4C34F00@alcyone.com>
	<qnky8rzid3y.fsf@arbutus.physics.mcmaster.ca>
Message-ID: <buq4ap$fsb$1@news.service.uci.edu>

> Or, expressing the idea that they're the ends of a number line:
> 
> PosInf, NegInf
> PosInfinity, NegInfinity
> PositiveInfinity, NegativeInfinity
> 
> If IEEE floating point was done correctly everywhere, I'd say make
> them the corresponding floating-point constants (Inf+ and Inf-).
> 
> Or,
> FreakingHuge, FreakingHugeTheOtherWay

PosInf, NegInf
PosInfinity, NegInfinity
PositiveInfinity, NegativeInfinity

All suggest that the Max and Min (or whatever you want to call them) are 
numbers.  Such a thing is misleading, and also tends to tie PEP 326 with 
PEP 754 (IEEE 754 Floating Point Special Values, which makes the case 
for a consistant name for +/- FP Infinity).

As stated in my PEP:

Guido has brought up [2]_ the fact that there exists two constants
that can be used in the interim for maximum values: sys.maxint and
floating point positive infinity (1e309 will evaluate to positive
infinity).  However, each has their drawbacks.

- On most architectures sys.maxint is arbitrarily small (2**31-1 or
   2**63-1) and can be easily eclipsed by large 'long' integers or
   floating point numbers.

- Comparing long integers larger than the largest floating point
   number representable against any float will result in an exception
   being raised::

         >>> cmp(1.0, 10**309)
         Traceback (most recent call last):
         File "<stdin>", line 1, in ?
         OverflowError: long int too large to convert to float

   Even when large integers are compared against positive infinity::

         >>> cmp(1e309, 10**309)
         Traceback (most recent call last):
         File "<stdin>", line 1, in ?
         OverflowError: long int too large to convert to float

- These same drawbacks exist when numbers are small.


From klapotec at chello.at  Thu Jan 29 18:41:33 2004
From: klapotec at chello.at (Christopher Koppler)
Date: Thu, 29 Jan 2004 23:41:33 GMT
Subject: Python vs. Io
References: <711c7390.0401291301.3f95794@posting.google.com>
	<qnkfzdyieg0.fsf@arbutus.physics.mcmaster.ca>
Message-ID: <tp5j10tvtgcddgntgthp477rl1j2vamee3@4ax.com>

On Thu, 29 Jan 2004 17:21:19 -0500, cookedm+news at physics.mcmaster.ca
(David M. Cooke) wrote:

>At some point, LittleDanEhren at yahoo.com (Daniel Ehrenberg) wrote:
>
[snip-a-lot]
>
>> For embedding, Io doesn't have to use Py_ALL_CAPS, instead it just
>> uses IoCamelCase, which looks much better. Interfaces to C are much
>> more object oriented.
>
>Ok, these two points are window-dressing: minor spelling and
>punctuation issues (which seems to be what most language wars are about).
>
>Heck, use boost::python for C++ interfaces; those function names are
>even shorter. Or use pyrex to generate wrappers, writing them in a
>Pythonesque language.
>
>> Many users of Io (myself included) have switched over from Python for
>> these reasons.
>>
>> I guess there are still the obvious advantages of Python over Io,
>> including
>> *large community
>> *more bindings to stuff
>
>Yep. That's a *big* difference, I'd say.

Using any language (other than a Lisp) which is sufficiently powerful
mostly comes down to personal preference regarding syntax. Library and
community support will of course grow for new languages if enough
people find it 'fits their minds' better than anything previously
available.

>
>> *strict coding conventions
>> *inflexible so everything is the same
>
>Can you elaborate a bit on why Python is inflexible? I find Python to
>be extremely flexible.

If inflexibility means not being able to arbitrarily change the
syntax, then I'm all for it, because it does help consistency and
readability, which I like very much in my programs, especially when
not working on them alone... Python seems to have found a good middle
ground between strictness and dynamism.
If I wanted a 'flexible' language, I'd use Lisp, or Forth.


--
Christopher


From skip at pobox.com  Thu Jan 15 15:51:35 2004
From: skip at pobox.com (Skip Montanaro)
Date: Thu, 15 Jan 2004 14:51:35 -0600
Subject: Inserting while itterating
In-Reply-To: <1074140382.26201.26.camel@dev.internal>
References: <pan.2004.01.14.08.43.00.894047@thomas-guettler.de>
	<1074140382.26201.26.camel@dev.internal>
Message-ID: <16390.64855.461276.130438@montanaro.dyndns.org>

>>>>> "Mark" == Mark McEahern <mark at mceahern.com> writes:

    Mark> On Wed, 2004-01-14 at 02:43, Thomas Guettler wrote:
    >> Hi,
    >> 
    >> Simple excerise:
    >> 
    >> You have a sorted list of integers:
    ...
    >> and you should fill all gaps:
    ...
    >> How would you code this?
    >> 
    >> Constrain: The original list should be changed, don't create a copy.

    Mark> In the spirt of unit testing...

    Mark> #!/usr/bin/env python
    ...

Here's a version which is much faster if you have large gaps and appears to
be only marginally slower if you have small gaps.

Skip

#!/usr/bin/env python

#!/usr/bin/env python

def fillGaps1(seq):
    expectedLength = seq[-1] - seq[0] + 1
    i = 1
    while i < expectedLength:
        if seq[i] - seq[i-1] > 1:
            seq.insert(i, seq[i-1] + 1)
        i += 1

def fillGaps(seq):
    expectedLength = seq[-1] - seq[0] + 1
    i = 1
    while i < expectedLength:
        if seq[i] - seq[i-1] > 1:
            gap = seq[i-1] - seq[i]
            fill = range(seq[i-1]+1, seq[i])
            seq[i:i] = fill
            i += len(fill)
        i += 1

if __name__ == "__main__":
    import timeit

    print "timing with one large gap:"
    t = timeit.Timer(setup='from fillgaps import fillGaps1 as fillGaps',
                     stmt='fillGaps([1, 5000])')
    print "old fillgaps:", t.timeit(number=100)
    t = timeit.Timer(setup='from fillgaps import fillGaps',
                     stmt='fillGaps([1, 5000])')
    print "new fillgaps:", t.timeit(number=100)

    print "timing with many small gaps:"
    t = timeit.Timer(setup='from fillgaps import fillGaps1 as fillGaps;l=range(1,5001,2)',
                     stmt='fillGaps(l)')
    print "old fillgaps:", t.timeit(number=100)
    t = timeit.Timer(setup='from fillgaps import fillGaps;l=range(1,5001,2)',
                     stmt='fillGaps(l)')
    print "new fillgaps:", t.timeit(number=100)

    import unittest
    class test(unittest.TestCase):
        def test(self):
            for fg in (fillGaps1, fillGaps):
                l = [1, 2, 4, 7, 8, 12]
                fg(l)
                self.assertEquals(l, range(1, 13))

                l = [1, 5000]
                fg(l)
                self.assertEquals(l, range(1, 5001))

    unittest.main()



From graham__fawcett at hotmail.com  Thu Jan 15 00:28:57 2004
From: graham__fawcett at hotmail.com (Graham Fawcett)
Date: 14 Jan 2004 21:28:57 -0800
Subject: what is best for web development??
References: <f046efac.0401100358.5aa812a0@posting.google.com>
	<87wu80559x.fsf@blakie.riol>
	<f046efac.0401120330.5c2e7c50@posting.google.com>
	<87oet9grqy.fsf@blakie.riol>
	<e9570f37.0401121052.ed79710@posting.google.com>
	<6ee58e07.0401140638.672d50a7@posting.google.com>
Message-ID: <e9570f37.0401142128.1861cdb@posting.google.com>

llothar at web.de (Lothar Scholz) wrote in message news:<6ee58e07.0401140638.672d50a7 at posting.google.com>...
> graham__fawcett at hotmail.com (Graham Fawcett) wrote in message news:<e9570f37.0401121052.ed79710 at posting.google.com>...
> > Wilk <wilkSPAM at OUTflibuste.net> wrote in message news:<87oet9grqy.fsf at blakie.
>  
> > If it has to be a one-shot install, I would suggest a Web server
> > written in Python -- Medusa or Twisted, probably -- that you could
> > bundle with your Python app. Find a Web app framework that (a) works
> > on Medusa or Twisted and (b) has the templating features you
> > require/desire.
> 
> I would not recommend this. A distribution with an own apache server
> seems to be the best. It is easy to hide the setup and the customers
> know that there is a good working technologie behind the scenes. And
> it can be managed by every normal administrator. This is a very
> important point for larger customers.

Therefore, you are suggesting ASP running on IIS? Or JSP + SunONE +
Oracle? <0.5 wink> Few Python solutions would satisfy the customer who
bears this level of concern.

There are countless potential customers for Intranet applications who
will never be able to install Apache. Many of them will never meet a
"normal administrator"  -- by which I assume you mean the "FOSS-savvy,
got Knoppix right here on my keydrive" variety, not the
MS/Lotus/Netware kind -- let alone employ one. They still deserve and
will pay for Intranet apps, and the company that can deliver and
deploy them easily will have a business advantage.

(I will never forget the first time I delivered such an app to a
client, and told him "just run the setup program", and he had a fully
functional Web app -- Web server, database and all -- running 40
seconds later. Nor will I forget the funny sound his jaw made as it
hit the floor.)

Lastly, almost any app that will run on a Python web server will also
run on Apache et. al., right? Unless you design it with Apache-centric
features; but I don't know if your concerned customer would appreciate
unnecessary platform lock-in! Offer both a Quick-Start and an FCGI
flavour of your app, and let the customer decide what he's capable of
administering.

In my book, an application that scales down (embedded httpd) as well
as up (Apache, etc.) beats a scaled-up-and-nowhere-to-go app any day.

Best wishes,

-- G


From nomail at hursley.ibm.com  Tue Jan 27 21:18:59 2004
From: nomail at hursley.ibm.com (Derek Fountain)
Date: Wed, 28 Jan 2004 10:18:59 +0800
Subject: Tcl style traces
Message-ID: <40171be5$0$1742$5a62ac22@freenews.iinet.net.au>

Does Python have something similar to Tcl style tracing? That is, the
ability to call a subroutine when a variable is written to or read from?


From tepihlaj at paju.oulu.fi  Mon Jan  5 20:04:31 2004
From: tepihlaj at paju.oulu.fi (Tero Pihlajakoski)
Date: 6 Jan 2004 01:04:31 GMT
Subject: Python/C and PYTHONPATH
References: <btbn3o$5oo$1@ousrvr3.oulu.fi>
	<mailman.98.1073310473.12720.python-list@python.org>
	<btc2ng$alg$1@ousrvr3.oulu.fi>
	<pan.2004.01.05.22.04.32.450627@yahoo.com>
	<btcp2n$jod$1@ousrvr3.oulu.fi>
	<pan.2004.01.06.00.07.02.165377@yahoo.com>
Message-ID: <btd1iv$mv9$1@ousrvr3.oulu.fi>

Samuel Walters <swalters_usenet at yahoo.com> wrote:
> |Thus Spake Tero Pihlajakoski On the now historical date of Mon, 05 Jan
> 2004 22:39:19 +0000|
>> I'll see if it's actually the C-part that's causing problems, but I worked
>> it around by adding:
>> 
>> PyRun_SimpleString("import sys\nsys.path.insert(0,'')");
>> 
>> right after the Py_Initialize().
>> 
>> Works ok. Guess I'm "allowed" to do that(?)
> IMLK (In My Limited Knowledge) that seems okay, but it also feels a bit
> ham-handed.  try this snippet:

Ok, there are comments here, somewhere: 

> ---untested code---
> #include <string.h>
> #include <stdlib.h>
> /* prototyping may not be neccessary... dunno...*/
> extern char *getenv(const char *name);
> extern char *setenv(const char *name, const char *value, int overwrite);
> /* comment them out if gcc complains about redeclarations. */

> /* append something to pythonpath */
> /* returns 0 on failure, 1 on creation of the env variable and 2 on an append
>   oh, and -1 in cases of catastrophic miscompilation */
> int myPyPathAppend(char *extrapath)
> {
>    char *buffer = NULL;
>    /* size to taste... You should do this dynamically to avoid future buffer overrun attacks*/
>    char eventual_path[1024] = { 0 };
>    /* take note: after getenv, buffer points to an external constant character buffer.
>       do NOT try to modify it directly.  use strcpy(char *dest, char *src)
>       (he says knowingly... is she into photography mate?)
>       */
>    if( (buffer = getenv("PYTHONPATH")) == NULL )
>    {
>        /* we're here because PYTHONPATH is not already part of the environment. */
>        
>        setenv("PYTHONPATH", extrapath, 1); /* the last argument makes sure that we create the env var*/
>        /* did it go happen ..  you should check this more rigorously*/
>        if( (buffer = getenv("PYTHONPATH")) == NULL)
>        {
>            /* we failed... abend. */
>            return 0;
>        }
>        else
>        {
>            /* success! cheers! */
>            return 1;
>        }
>        return -1; /* dead code... should never reach here */
>    }
>    else
>    {
>        /* PYTHONPATH already exists.  append ';', then our new path and update it. */

Here. I might not want to add ';' or ':', depending on the OS (probably
not)? I can solve this with #ifdefs for WIN32 and Linux, but everytime I
want to run it on a new system, I'd have to find out the delimiter... It
also needs a buffer underrun check on that [1024]. I'll stick with the
PyRun_... for now, but I'll definitely save this code, so thanks. Again.

Also, found this piece from sys.path docs (now that my net is up and
running):
  ... "A program is free to modify this (sys.path) list for its own
purposes." ...
  

>                
>        /* find the "=" in the buffer...
>           from  string.h
>           extern char *strstr (__const char *__haystack, __const char *__needle)
>           there's a better way to do this, but I can't recall the function off the top of my head
>        */
>        buffer = strstr(buffer, "=") + 1; /* +1 because buffer points to the equals.  we want the string starting after it. */
>        
>        /* copy the old PYTHONPATH string */
>        strcpy(eventual_path, buffer);
>        strcat(eventual_path, ";");
>        strcat(eventual_path, extrapath);

>        setenv("PYTHONPATH", extrapath, 1); /* the last argument makes sure that we create the env var*/
>        /* did it go happen ..  you should check this more rigorously*/
>        if( (buffer = getenv("PYTHONPATH")) == NULL)
>        {
>            /* we failed... abend. */
>            return 0;
>        }
>        else
>        {
>            /* success! cheers! */
>            return 2;
>        }
>        return -1; /* dead code... should never reach here */
>    }

One if and two elses, have you started "getting ready" for the party
already? ;) Or maybe it's fuzzy logic ;)

>    else
>    {
>        /* PYTHONPATH already exists.  append ';', then our new path and update it. */
>        /* find the "=" in the buffer...

... snip ...

>    }
>    return -1; /* deader code... should *really* never reach here */
> }
> ---untested code---
> I haven't tested, compiled or even read through this code.
> I'm late for a party and still added comments
> That means you get punctuation patrol :-P
> Check the semicolons, check the braces
> Hey, I hear that in some companies they call this teamwork methodology
> "extreme-programming"  We're buzzword compliant!

- Tero

-- 



From sross at connectmail.carleton.ca  Sat Jan  3 13:48:12 2004
From: sross at connectmail.carleton.ca (Sean Ross)
Date: Sat, 3 Jan 2004 13:48:12 -0500
Subject: Integer math question
References: <3987e01c.0401030832.114c6f2a@posting.google.com>
	<11EJb.20461$Vl6.3782481@news20.bellglobal.com>
Message-ID: <%5EJb.20472$Vl6.3783985@news20.bellglobal.com>


"Sean Ross" <sross at connectmail.carleton.ca> wrote in message
news:11EJb.20461$Vl6.3782481 at news20.bellglobal.com...
>then a/b is represented by [1] as

'represented'  is the wrong word here, but hopefully, you get the idea ...





From fisher at energy.uch.net  Mon Jan 26 07:17:22 2004
From: fisher at energy.uch.net (Serge A. Ribalchenko)
Date: Mon, 26 Jan 2004 14:17:22 +0200
Subject: TELNET instead PING
In-Reply-To: <5f505344.0401260332.184d4225@posting.google.com>
References: <5f505344.0401260332.184d4225@posting.google.com>
Message-ID: <ca03vb.5ba.ln@energy.uch.net>

DCK wrote:
> Hello :)
> 
> Into group-archive i found most e-mails, which touches PINGing.
> In my work i've used TELNET for testing if host is operational.
> Sometimes, for unknown reasons, workstation doesn't respond
> for PINGing. But in WinNT network, all hosts has a nbsession
> listening on port 139. I always use this script instead PING
> command (hope, will be usefull for someone :) ):

thanks a lot.
Can you do the same using ARP who-has request ? :)



From rmkrauter at yahoo.com  Fri Jan 23 23:31:57 2004
From: rmkrauter at yahoo.com (Rich Krauter)
Date: Fri, 23 Jan 2004 23:31:57 -0500
Subject: Batch commands on Windows
In-Reply-To: <grmQb.15157$yd7.13778@newssvr27.news.prodigy.com>
References: <7A3Qb.4870$AK2.3953@newssvr29.news.prodigy.com>
	<mailman.689.1074867434.12720.python-list@python.org>
	<grmQb.15157$yd7.13778@newssvr27.news.prodigy.com>
Message-ID: <1074918717.4458.142.camel@vaio>

Each of your system calls spawns it's own separate shell with its own
set of environment variables. You probably want to look into os.environ
(python) or %ENV (perl) to set your shell variables.


On Fri, 2004-01-23 at 23:23, Moosebumps wrote:

> > Can you give an example of what you mean, in Perl as well as what you
> hoped
> > would work in Python? I couldn't quite understand what it is that you're
> trying
> > to do.
> 
> OK, actually on second test, the problem is mostly with IDLE, but not
> totally.  When I hit F5 under IDLE, it behaves differently with respect to
> the command window then if I just run it by double-clicking on the file.
> 
> Here is an example:
> 
> BatchTest.bat:
> 
> set MYVAR=3
> dir
> pause
> dir
> echo %MYVAR%
> pause
> 
> BatchTest.py:
> 
> # the intention is to do the same thing as BatchTest.bat, but it doesn't
> work under either IDLE or by double-clicking
> # in particular the environment variable is not saved, and it doesn't work
> if I replace os.system with os.popen
> 
> import os
> 
> os.system("set MYVAR=3")
> os.system("dir")
> os.system("pause")
> os.system("dir")
> os.system("echo %MYVAR%")
> os.system("pause")
> 
> BatchTest.pl:
> 
> # this actually does the same thing as Python, I was mistaken.  I was
> mislead by the IDLE behavior.
> 
> system('set MYVAR=3');
> system('dir');
> system('pause');
> system('dir');
> system('echo %MYVAR%');
> system('pause');
> 
> The general idea is that it would be nice if there weren't any differences
> between the batch file and python.  From a practical standpoint, it would
> encourage a lot of people to switch from nasty batch files to Python scripts
> if you could just surround the entire thing with os.batch(' ') or some
> similar sort of mechanical textual substitution.  Then you could clean it up
> gradually.
> 
> I am aware of os.environ and such, and that is useful, but it's not really
> the point.
> 
> Of course I could write a function to take a bunch of strings, write a batch
> file, save the working directory, execute it, restore the current directory,
> then delete the batch file, but that seems like an awful hack.  Though I
> probably will do that at some point.
> 
> > > What's the deal with that?  I thought Python started out as a scripting
> > > language.  And that seems like the most basic thing that a scripting
> > > language should do.
> >
> > Dunno, although MS-DOS shell scripting is certainly a small subset of
> scripting
> > in general. Maybe with a concrete example somebody will be able to give
> you a
> > hand.
> 
> It is a small subset, but an important subset.  Shell scripting started
> probably when people got sick of typing the same commands into the prompt.
> For a language to really support shell scripting, it should provide a way of
> automating the process of typing in the commands.  As in, there should be no
> difference whether you're actually typing, or you're running the script.
> 
> If there is a way and I don't know about it, I would be happy to hear about
> it.  But I do think it is a pretty big hole.
> 
> MB
> 
-------------- next part --------------
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From peter at engcorp.com  Wed Jan 28 14:06:25 2004
From: peter at engcorp.com (Peter Hansen)
Date: Wed, 28 Jan 2004 14:06:25 -0500
Subject: Deprecated modules
References: <mailman.930.1075308143.12720.python-list@python.org>
Message-ID: <40180831.D860A0B4@engcorp.com>

Richard Philips wrote:
> 
> How can I look for deprecated standard library modules in my scripts
> WITHOUT executing these scripts?

Grep?


From dave at pythonapocrypha.com  Sat Jan 24 14:43:30 2004
From: dave at pythonapocrypha.com (Dave Brueck)
Date: Sat, 24 Jan 2004 12:43:30 -0700
Subject: progress bar
References: <59e5b87.0401231329.6e084d6f@posting.google.com><mailman.715.1074893879.12720.python-list@python.org>
	<9pwQb.5566$vy6.3518@newssvr29.news.prodigy.com>
Message-ID: <04e501c3e2b2$589b1380$6401fea9@YODA>

Hoang wrote:
> > Try Venster:
> > http://venster.sourceforge.net
> >
> > IIRC the test_coolbar.py script includes a progress bar.
>
> I wonder what possessed someone to start another GUI framework.  Aren't
> there more than enough existing ones?  The reasoning for it wasn't
> immediately apparent on the web page.

Well, the intro you read said:

"Venster is a highly native Windows GUI toolkit for Python based on the ctypes
ffi library. The aim of Venster is to be a very lightweight wrapper around the
standard Win32 API, making it easy to write slick windows applications in pure
Python. "

Being very lightweight is a big deal compared to many other frameworks. I
include Venster in one of my applications and it weighs in at under 100KB. If
size of download / installer is important, this is a real win compared to the
multi-megabyte size of most other frameworks - the entire application (Python +
Venster + app) is shipped in a 1.3 MB cab file.

The other thing worth noticing from the intro is that Venster is pure Python.
Because of that it's very easy to extend and you avoid all sorts of build
hassles because there _is_ no build.

IMO the main downside of Venster is that it is not yet as mature as other
frameworks, so programming in it is not nearly as highlevel as, say, wxPython.
Still, there's a number of places where it's a good fit already - at my company
we recently started using it in a new application where the UI is either done
in Flash or in a few dialog boxes, and Venster creates the Window to host the
UI, does the dialog boxes, and handles the events generated by Flash - it'd be
overkill to have to include all of wxPython just to get that functionality.

-Dave




From bsneddonNOspam at yahoo.com  Wed Jan 28 09:27:59 2004
From: bsneddonNOspam at yahoo.com (Bill Sneddon)
Date: Wed, 28 Jan 2004 09:27:59 -0500
Subject: r prefix bug ... or my lack of understanding?
Message-ID: <bv8gtj$5ob$1@ngspool-d02.news.aol.com>

Below is from python 2.3.3 on windows.
I have tryed on Pythonwin and Idle and on
a Solaris unix build 2.2.2.

I know there are work arounds but the behavior
seems a bit strange to me.

 >>> path = r'c:\data'   #this is fine
 >>> print path
c:\data

 >>> path = r'c:\data\'
Traceback (  File "<interactive input>", line 1
     path = r'c:\data\'
                      ^
SyntaxError: EOL while scanning single-quoted string

 >>> path = r'c:\data\\'
 >>> print path
c:\data\\



From M.Waack at gmx.de  Sat Jan  3 17:38:20 2004
From: M.Waack at gmx.de (Mathias Waack)
Date: Sat, 03 Jan 2004 23:38:20 +0100
Subject: Lists are weird when they are instance members
References: <ffHJb.5475$HL3.4277@newssvr29.news.prodigy.com>
Message-ID: <srsjc1-kna.ln1@valpo.de>

python newbie wrote:

> test.py
> ----------------
> 
>  global_filegroup_array = []  # array of filegroup objects
> 
>  class FileGroup:
>        a = 0
>        mylist = []      # here it is

This is a class variable, not a member or instance variable. Make
sure you know the difference. 

>        def  put_stuff_in_my_list(self, anyfile):
>               self.mylist.append( get just a single string from
>               file)   

This line creates a member variable "mylist" of the current instance
"self" of class "FileGroup" as a copy of the class variable
"FileGroup.mylist". 

Just create your member variables in the c'tor function __init__.
This should solve all your problems (ok, at least this problem;)

And btw. Python in a nutshell (I haven't read the other books you've
mentioned) explains the differences between class and member
variables. 

Mathias


From tdelaney at avaya.com  Thu Jan  8 19:51:23 2004
From: tdelaney at avaya.com (Delaney, Timothy C (Timothy))
Date: Fri, 9 Jan 2004 11:51:23 +1100
Subject: What psyco is goot at [Was: Rookie Speaks]
Message-ID: <338366A6D2E2CA4C9DAEAE652E12A1DE010637C9@au3010avexu1.global.avaya.com>

> From: Samuel Walters
> 
> Psyco only optimizes functions as a whole.

Oh yeah - that's the killer all right. There's no question where the bottleneck is in terms of how psyco.profile() can work on that particular piece of code.

The code in question is in any case a prototype. I was using it as a datapoint to show that you do need to test with the various options to see what works for your application. In that case, the psyco.full() overhead was insignificant compared to the memory usage, and had great advantages. In some other cases, psyco.profile() will be better.

Anyway, when the non-psyco code takes an hour, and the psyco.full() version takes 10 minutes, you know you're onto a winner :)

Tim Delaney



From clifford.wells at comcast.net  Mon Jan 26 03:55:46 2004
From: clifford.wells at comcast.net (Cliff Wells)
Date: Mon, 26 Jan 2004 00:55:46 -0800
Subject: Class returning None ?
In-Reply-To: <2r4Rb.286342$e6.11127748@twister2.libero.it>
References: <2r4Rb.286342$e6.11127748@twister2.libero.it>
Message-ID: <1075107345.13581.1060.camel@devilbox.homelinux.net>

On Mon, 2004-01-26 at 00:43, George Marshall wrote:
> Hi, I'm wondering, what's the best way to check for
> success or failure on object initialization ?

Raise an exception.


> This is my ugly workaround to do that :

[snip]

> What's the python way to do that ?

from exceptions import Exception

class SomeError(Exception): pass

class mytest:
    def __init__(self):
       if not everythingok():
           raise SomeError

def main():
    try:
        a = mytest()
    except SomeError:
        return 1

Regards,
Cliff

-- 
Pushing the stone up the hill of failure
                                 -Swans




From jikosan at myrealbox.com  Sun Jan 11 17:37:25 2004
From: jikosan at myrealbox.com (Jikosan)
Date: Sun, 11 Jan 2004 22:37:25 GMT
Subject: Help with if statement
References: <d91f466b.0401102201.3709771@posting.google.com>
	<V_8Mb.56251$C87.20259@twister.socal.rr.com>
	<7xk73y8eet.fsf@ruckus.brouhaha.com>
Message-ID: <FekMb.57734$C87.42732@twister.socal.rr.com>

"Paul Rubin" <http://phr.cx at NOSPAM.invalid> wrote in message
news:7xk73y8eet.fsf at ruckus.brouhaha.com...

Thanks Paul. I so far have only been learning Python from the tutorial and
greatly appreciate your tips.

|
| > #Convert pi and N to log10 and write to a file to graph on Excel.
|
| Why are you going to graph log(N) vs log(pi)?  Do you expect them
| to have an exponential relationship?  If not, log(N) vs pi, instead
| of log(pi), may make more sense.

Because my professor wants us to graph it log(N) vs log(pi).
Actually, it's log [P(N) - pi/4] vs log N. I misread the question again last
night.




From anton at vredegoor.doge.nl  Sat Jan 31 04:05:04 2004
From: anton at vredegoor.doge.nl (Anton Vredegoor)
Date: Sat, 31 Jan 2004 10:05:04 +0100
Subject: HowTo Search in nested lists
References: <mailman.1061.1075490301.12720.python-list@python.org>
	<qhem10trs44dlm2r5krtcu70rd9v9o6aq0@4ax.com>
Message-ID: <401b6fee$0$130$3a628fcd@reader2.nntp.hccnet.nl>

Christopher Koppler <klapotec at chello.at> wrote:

[Robert]
>>Good answers, Christopher. You might consider combining the several
>>approaches into a single one by creating an iterator;

>Well, just what popped into my mind first. I still have some trouble
>getting iterators and generators to pop up before, though often
>they're just so much more elegant, as your solution shows. But for
>that I have to consciously think about the problem, whereas ordinary
>functions are quite entrenched in my brain. I blame my shady past of
>Pascal, Visual Basic, Modula 2, C, and Java. At least by now I
>instantly think of list comprehensions...

One might also consider the following solution which swaps rows and
columns by combining the star operator and the zip function :

print [i for i,col in enumerate(zip(*t)) if 5 in col]

Anton



From fuf at mageo.cz  Wed Jan 28 08:02:04 2004
From: fuf at mageo.cz (Michal Vitecek)
Date: Wed, 28 Jan 2004 14:02:04 +0100
Subject: type() for new style classes - buggy?
Message-ID: <20040128130204.GA10744@foof.i3.cz>

 hello,

 does the type() command work correctly for new style classes? i guess
 it does not, unfortunately. for example, for a new style class'
 instance it returns <class '__main__.ClassName'>, but for old style
 class' instance it returns <type 'instance'>.

 >>> import types
 >>> class A(object):
         pass
 >>> class B:
         pass
 >>> type(A())
 <class '__main__.A'>
 >>> type(B())
 <type 'instance'>
 >>> type(A()) == types.InstanceType
 0
 >>> type(B()) == types.InstanceType
 1

 how can one then determine what he's working with when he uses new
 style classes (either instance or class)?

        thank you,
-- 
		fuf		(fuf at mageo.cz)



From db2team at hotmail.com  Thu Jan 22 05:23:49 2004
From: db2team at hotmail.com (DB2)
Date: 22 Jan 2004 02:23:49 -0800
Subject: python As400
References: <mailman.574.1074678559.12720.python-list@python.org>
	<bumjtk$f78$1@nemesis.news.tpi.pl>
Message-ID: <a78ec628.0401220223.49f37e2c@posting.google.com>

You will need an ODBC driver for DB2, ie Client Access or StarSQL
(www.starquest.com).

Bob

Jarek Zgoda <jzgoda at gazeta.usun.pl> wrote in message news:<bumjtk$f78$1 at nemesis.news.tpi.pl>...
> Enrique <enrique.palomo at xgs-spain.com> pisze:
> 
> > i checked before this website, http://www.iseriespython.com/, but found no
> > much information in it (docs)
> 
> Sorry, I meant "check this site to read documentation for
> AS/400-specific modules".
> 
> > worse? how much worse? more worse that can be assumed?
> 
> I don't know, I never tried to measure it.
> 
> > and connect python on windows with db2 in as400??
> 
> No chance except ODBC (http://www.egenix.com/) or ADO (i.e. adodbapi on
> SourceForge), anyway you will need Client Access installed.


From mwh at python.net  Mon Jan 12 14:12:53 2004
From: mwh at python.net (Michael Hudson)
Date: Mon, 12 Jan 2004 19:12:53 GMT
Subject: script to translate from compiler AST
References: <m3d69qk10i.fsf@netmaster.kds.com.ua>
	<m3u131z7ra.fsf@pc150.maths.bris.ac.uk>
	<m3oet9hwk9.fsf@netmaster.kds.com.ua>
Message-ID: <m3llodyo96.fsf@pc150.maths.bris.ac.uk>

Andrey Khavryuchenko <akhavr at kds.com.ua> writes:

> Imagine, I've built an AST that I want to run.  I've not found an
> easy (read library) way to do that, hence the question.

Ah!  Try

http://groups.google.com/groups?th=f3f7a7f6fac16ca2

Cheers,
mwh

-- 
  A.D. 1517: Martin Luther nails his 95 Theses to the church door and
             is promptly moderated down to (-1, Flamebait).
        -- http://slashdot.org/comments.pl?sid=01/02/09/1815221&cid=52
                                        (although I've seen it before)


From carroll at tjc.com  Wed Jan 14 17:48:46 2004
From: carroll at tjc.com (Terry Carroll)
Date: Wed, 14 Jan 2004 22:48:46 GMT
Subject: Unicode and exception strings
References: <svl1xq98gdc.fsf@dresden.uio.no>
	<cf0uvv4m34rgcgoi2nfj3hcgugbah82k96@4ax.com>
	<svl4qv17gw8.fsf@dresden.uio.no>
	<oj6900hku41dphjdep4t54cc9l0jggq195@4ax.com>
Message-ID: <nfhb00te82upfjkjhcnnrffe0qn2r70tmh@4ax.com>

On Wed, 14 Jan 2004 01:32:36 GMT, Terry Carroll <carroll at tjc.com> wrote:

>You can try to extract it as above, and then decode it with the codecs
>module, but if it's only the first byte, it won't decode correctly:
>
>>>> import codecs
>>>> d = codecs.getdecoder('utf-8')
>>>> x.args[0]
>u'\xf8'
>>>> d.decode(x.args[0])
>Traceback (most recent call last):
>  File "<stdin>", line 1, in ?
>AttributeError: 'builtin_function_or_method' object has no attribute
>'decode'
>>>>

Oops.  Copy-and-pasted the wrong line here.  Let's try that again:

>>> x = ValueError(u'\xf8')
>>> import codecs
>>> d = codecs.getdecoder('utf-8')
>>> d(x.args[0])
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
UnicodeEncodeError: 'ascii' codec can't encode character u'\xf8' in
position 0:
ordinal not in range(128)
>>>

*That's* the exception I was trying to show, not the AttributeError you
get when you use the decoder wrongly!



From gerrit at nl.linux.org  Mon Jan 19 17:12:59 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Mon, 19 Jan 2004 23:12:59 +0100
Subject: __init__(self, *args, **kwargs) - why not always?
In-Reply-To: <cab22418.0401191358.297a0415@posting.google.com>
References: <cab22418.0401191358.297a0415@posting.google.com>
Message-ID: <20040119221259.GA11631@nl.linux.org>

Jim Jewett wrote:
> More specifically, is there any reason not to replace:
> 
>     class SubClass(BaseClass):
>         def __init__(self):
>             BaseClass.__init__(self)
> 
> with: 
> 
>     class SubClass(BaseClass):
>         def __init__(self, *args, **kwargs):
>             BaseClass.__init__(self, *args, **kwargs)
> 
> on a near-global basis?  

A subclass may be a specialized case, e.g.:

class Tree:
    def __init__(self, evergreen=False):
        ...

class Spruce(Tree):
    def __init__(self):
        Tree.__init__(self, True)

or the other way around, e.g.

class Enemy:
    def __init__(self, pos):
        ...

class ShootingEnemy(Enemy):
    def __init__(self, pos, bullets):
        Enemy.__init__(pos)
        ...

In both cases I don't want to BaseClass.__init(self, *args, **kwargs)...

yours,
Gerrit.

-- 
105. If the agent is careless, and does not take a receipt for the
money which he gave the merchant, he can not consider the unreceipted
money as his own.
          -- 1780 BC, Hammurabi, Code of Law
-- 
PrePEP: Builtin path type
    http://people.nl.linux.org/~gerrit/creaties/path/pep-xxxx.html
Asperger's Syndrome - a personal approach:
	http://people.nl.linux.org/~gerrit/english/



From goodger at python.org  Tue Jan 27 21:50:04 2004
From: goodger at python.org (David Goodger)
Date: Tue, 27 Jan 2004 21:50:04 -0500
Subject: Confused about a list.sort()
In-Reply-To: <S6FRb.2098$P17.1139@fed1read03>
References: <S6FRb.2098$P17.1139@fed1read03>
Message-ID: <4017235C.2010605@python.org>

list.sort() sorts the list in-place; it doesn't return a new list.
Instead of "List1 = List1.sort()" just do "List1.sort()".

See the FAQ entry:
http://www.python.org/doc/faq/general.html#why-doesn-t-list-sort-return-the-sorted-list

-- David Goodger




From ewilhelm at somethinglike.sbcglobalDOTnet  Thu Jan 22 17:51:46 2004
From: ewilhelm at somethinglike.sbcglobalDOTnet (Eric Wilhelm)
Date: Thu, 22 Jan 2004 22:51:46 GMT
Subject: Program Python in VIM
References: <871xpsc5zf.fsf@tulip.whu.ca> <r7xrvm1a.fsf@yahoo.co.uk>
Message-ID: <pan.2004.01.22.16.54.32.703892.5383@somethinglike.sbcglobalDOTnet>

On Thu, 22 Jan 2004 13:08:33 -0600, Paul Moore wrote:

> Peter Wu <peterwu at hotmail.com> writes:
> 
>> I'm giving vim a try to program Python. The following are the steps I
>> follow to code/test a python program.
>>
>> vi test.py
>> [key in some python code]
>> :wq
>> :!python test.py
>>
>>
>> Is there any other way? I don't want to type 'python test.py' every
>> time I've made any modifications. In Emacs, I can simply fire C-c C-c
>> to fire the python interpreter. Thanks!
> 
> There's always
> 
> :map ^C^C :w^M:!python %^M
> 
> which makes C-c C-c write the file and then run it in Python.

This is good, but what about starting your file with #!/usr/bin/python,
setting it as executable with :!chmod 755 %, and then leaving python out
of the "run this file" line?  Advantage here is that you can then be a
Perl programmer as well, or even toss-off some of those really simple
deals in Bash script.

Another suggestion:  maybe leave the ^M off of the end so that you can ^c^c
<enter> or add some arguments if needed.

Of course, if you want emacs-style bindings, you could just use emacs:)
I'd be more inclined to connect this one to something closer to the
escape key and lose the bucky bits.

--Eric


From alanmk at hotmail.com  Sun Jan 18 11:49:58 2004
From: alanmk at hotmail.com (Alan Kennedy)
Date: Sun, 18 Jan 2004 16:49:58 +0000
Subject: Suggested generator to add to threading module.
References: <7934d084.0401152058.164a240c@posting.google.com>
	<40083eac$0$321$e4fe514c@news.xs4all.nl>
	<mailman.446.1074283391.12720.python-list@python.org>
	<40086C6E.8536542C@hotmail.com>
	<40098f12$0$320$e4fe514c@news.xs4all.nl>
Message-ID: <400AB936.BA1D9D73@hotmail.com>

[Andrae Muys]
>>>>> Found myself needing serialised access to a shared generator from
>>>>> multiple threads.  Came up with the following
>>>>>
>>>>> def serialise(gen):
>>>>>   lock = threading.Lock()
>>>>>   while 1:
>>>>>     lock.acquire()
>>>>>     try:
>>>>>       next = gen.next()
>>>>>     finally:
>>>>>       lock.release()
>>>>>     yield next

[Ype Kingma]
>>>> Is there any reason why the lock is not shared among threads?
>>>> From the looks of this, it doesn't synchronize anything
>>>> between different threads. Am I missing something?

[Jeff Epler]
>>> Yes, I think so.  You'd use the same "serialise" generator object in
>>> multiple threads, like this:
>>>
>>> p = seralise(producer_generator())
>>> threads = [thread.start_new(worker_thread, (p,))
>>>                 for t in range(num_workers)]

[Alan Kennedy]
>> Hmm. I think Ype is right: the above code does not correctly serialise
>> access to a generator.

[Ype Kingma]
> Well, I just reread PEP 255, and I can assure you a was missing
> something...

Ype,

Ah: I see now. You thought it didn't work, but for a different reason
than the one I pointed out. You thought that the lock was not shared
between threads, though as Jeff pointed out, it is if you use it the
right way. 

But it still doesn't work.

[Alan Kennedy]
>> I believe that the following definition of serialise will correct the
>> problem (IFF I've understood the problem correctly :-)
>>
>> #-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
>> import time
>> import thread
>> import threading
>>
>> class serialise:
>>   "Wrap a generator in an iterator for thread-safe access"
>>
>>   def __init__(self, gen):
>>     self.lock = threading.Lock()
>>     self.gen = gen
>>
>>   def __iter__(self):
>>     return self
>>
>>   def next(self):
>>     self.lock.acquire()
>>     try:
>>       return self.gen.next()
>>     finally:
>>       self.lock.release()

[Ype Kingma]
> Looks like a candidate for inclusion in a standard library to me.

Well, maybe :-)

To be honest, I don't have the time to write test cases, docs and
patches. So I think I'll just leave it for people to find in the
Google Groups archives ...

[Alan Kennedy]
>> Also, I don't know if I'm happy with relying on the fact that the
>> generator raises StopIteration for *every* .next() call after the
>> actual generated sequence has ended. The above code depends on the
>> exhausted generator raising StopIteration in every thread. This seems
>> to me the kind of thing that might be python-implementation specific.
>> For example, the original "Simple Generators" specification, PEP 255,
>> makes no mention of expected behaviour of generators when multiple
>> calls are made to the its .next() method after the iteration is
>> exhausted. That I can see anyway? Am I wrong?

[Ype Kingma]
> Quoting from PEP 234:
> http://www.python.org/peps/pep-0234.html
> 
> "Once a particular iterator object has raised StopIteration, will
> it also raise StopIteration on all subsequent next() calls?
> ...
> Resolution: once StopIteration is raised, calling it.next()
> continues to raise StopIteration."

Yes, that clears the issue up nicely. Thanks for pointing that out.

So the same code will run correctly in Jython 2.3 and IronPython
(awaited with anticipation).

regards,

-- 
alan kennedy
------------------------------------------------------
check http headers here: http://xhaus.com/headers
email alan:              http://xhaus.com/contact/alan


From pln at razzle.Stanford.EDU  Mon Jan 19 19:50:01 2004
From: pln at razzle.Stanford.EDU (Patrick L. Nolan)
Date: Tue, 20 Jan 2004 00:50:01 +0000 (UTC)
Subject: Launching Wordpad on Windows
Message-ID: <buhtvp$l0j$1@news.Stanford.EDU>

I'm trying to find a clean way to launch a Wordpad editor
on Windows.  By "clean", I mean that it should work on as
many versions of Windows as possible, and it shouldn't
require installing any extra software.  I assume everyone
has win32api and its friends.

The problem is to find the path to wordpad.exe.  At first
I just copied the path from my XP machine:
c:\Program Files\Windows NT\Accessories\WORDPAD.EXE

I verified that the same path works on W2K, but I don't
know about older versions.  With some labor I was able
to come up with a longer, more obfuscated bit of code:

item = "SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\App Paths\\WORDPAD.EXE"
key = win32api.RegOpenKey(win32con.HKEY_LOCAL_MACHINE, item, 0, 
			  win32con.KEY_QUERY_VALUE)
info = win32api.RegQueryValueEx(key, None)
win32api.RegCloseKey(key)
editor = win32api.ExpandEnvironmentStrings(info[0])

I would like to solicit learned opinions about this.  Which
version will work in more versions of Windows?  Is there a
better approach?

-- 
*   Patrick L. Nolan                                          *
*   W. W. Hansen Experimental Physics Laboratory (HEPL)       * 
*   Stanford University                                       *


From reply.in.the.newsgroup at my.address.is.invalid  Fri Jan  9 02:11:28 2004
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Fri, 09 Jan 2004 08:11:28 +0100
Subject: what is Python's module search path?
References: <b16e4ef7.0401080738.1da0cdc5@posting.google.com>
	<iu4rvvcipctl7l46jhskbc6ubj3cu52iu9@4ax.com>
	<b16e4ef7.0401081520.67bcf14a@posting.google.com>
Message-ID: <kaksvv4r32gvh07kgcvohonmn69urgacc6@4ax.com>

Stephen Ferg:
>It says """When a module named spam is imported, the interpreter
>searches for a file named spam.py in the current directory, and then
>in the list of directories specified by the environment variable
>PYTHONPATH. ... When PYTHONPATH is not set, or when the file is not
>found there, the search continues in an installation-dependent default
>path; on Unix, this is usually .:/usr/local/lib/python.
>
>Actually, modules are searched in the list of directories given by the
>variable sys.path which is initialized from the directory containing
>the input script (or the current directory), PYTHONPATH and the
>installation-dependent default."""
>
>Is the installation-dependent default path on Windows usually
>Lib/site-packages?

I guess it's more than that.

PythonWin 2.2.2 (#37, Oct 14 2002, 17:02:34) [MSC 32 bit (Intel)] on
win32.
>>> import sys
>>> print sys.path
['','C:\\Python\\Python22\\lib\\site-packages\\Pythonwin',
'C:\\Python\\Python22\\lib\\site-packages\\win32',
'C:\\Python\\Python22\\lib\\site-packages\\win32\\lib',
'C:\\Python\\Python22\\lib\\site-packages', 'C:\\Python\\Python22\\DLLs',
'C:\\Python\\Python22\\lib', 'C:\\Python\\Python22\\lib\\lib-tk',
'C:\\Python\\Python22']

None of these directories qualify for any of the other categories, so
these must all be in the installation-dependent default.

>If so, then it looks like my original search order was wrong, 
>and the correct search order (on Windows) is:
>
>---------------------------------------------------------
> * Python's built-in modules, including modules in the standard
>library
> * the directory from which your main module was loaded
> * in directories in PYTHONPATH
> * in the /python23/Libs/site-packages directory
>--------------------------------------------------------
>
>Is that correct?

Well no, I don't think so. The tutorial doesn't say that the modules in
the standard library are searched first. It says the current directory is
first, which you don't even mention. And the tutorial says sys.path is
searched, which may be modified by the program.

Why are you trying to rephrase the tutorial, when the tutorial is
perfectly clear?

>Part of what is confusing me is that Lib/site-packages is pretty
>poorly documented.

It doesn't have to be, for ordinary users. My guess is the documentation
is in this area: http://www.python.org/sigs/distutils-sig/doc/

-- 
Ren? Pijlman


From kelianichols at ssdd.nrl.navy.mil  Mon Jan  5 10:59:10 2004
From: kelianichols at ssdd.nrl.navy.mil (Kelia Nichols)
Date: Mon, 05 Jan 2004 10:59:10 -0500
Subject: Pyserial question
Message-ID: <000d01c3d3a4$db8464d0$17abfa84@Nuvodido>

Hello,

I am using Pyserial to work with a RS232 device.  My question is, how do I
write hex to the device or cannot write hex to it pyserial?

Kelia Nichols
______________________________________
No trees were killed in the sending of this message. However a large number
of electrons were terribly inconvenienced.






From tjreedy at udel.edu  Fri Jan 23 13:22:44 2004
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 23 Jan 2004 13:22:44 -0500
Subject: Ordered dictionary?
References: <leWPb.231$af7.162835@newshog.newsread.com><f7XPb.9179$7D.3428@fe2.texas.rr.com>
	<slrnc11piq.etj.apardon@trout.vub.ac.be>
Message-ID: <burop6$rf4$1@sea.gmane.org>

> Well I too sometimes need the keys in a dictionary to be sorted and your
> solutions wouldn't help. The problem is the following.
>
> I have a number of key value pairs, like names and telephone numbers.
> Just more subject to change.  Now I want the telephone numbers of
everyone
> whose name starts with "jan".
>
> Or I just inserted a name and want to know who is alphabetically next.
> Or I want to know who is first or last.

A python dict is not very well suited to this, especially for large numbers
of key,value pairs.  However, if you do pull out sorted lists of keys, use
the bisect module to find specific keys.  log(n) behavior is fine.

A table with a btree index is designed for the things your want to do.
There is a btree,py in zope (by Tim Peters, I believe), but I do not know
how 'extractable' it is.  You could search the archives.

Terry J. Reedy






From writeson at earthlink.net  Fri Jan 23 07:16:06 2004
From: writeson at earthlink.net (Doug Farrell)
Date: 23 Jan 2004 04:16:06 -0800
Subject: debugging
Message-ID: <88bc63c6.0401230416.7acf904c@posting.google.com>

Hi all,

Can someone help me out a little with Python? What do people use to
debug Python code? I don't understand how to use the built in debugger
and I haven't had any luck getting ddd to debug my Python programs. I
end up falling back on inserting print statements in my code to figure
out what's going on. This works but isn't always the fastest route to
a solution. So, I'm just wondering what other people do.

Thanks,
Doug


From sombDELETE at pobox.ru  Sat Jan 17 04:10:24 2004
From: sombDELETE at pobox.ru (Serge Orlov)
Date: Sat, 17 Jan 2004 12:10:24 +0300
Subject: Binary strings, unicode and encodings
References: <265368cb.0401151138.37a3a47b@posting.google.com>
	<4006F13C.7D432B98@engcorp.com>
	<265368cb.0401151529.50c36679@posting.google.com>
	<4007F50F.E2AF33AD@engcorp.com>
	<265368cb.0401161604.58099d89@posting.google.com>
Message-ID: <buau5q$n2v$1@nadya.doma>


"Laurent Therond" <google at axiomatize.com> wrote in message news:265368cb.0401161604.58099d89 at posting.google.com...
> Peter, thank you for taking the time to answer.
>
> I will need some time to digest this information.
>
> From where I stand, a Python newbie who knows more about Java, this
> concept of binary string is puzzling. I wish Python dealt in Unicode
> natively, as Java does. It makes things a lot easier to comprehend

Python does deal with Unicode natively. You just need to put u
character before the string. This of course a violation of the rule
"There should be one-- and preferably only one --obvious way to do it."
'a' == u'a'. But remember that Python appeared before Unicode,
so strings in Python could not be unicode strings from the beginning
.
> Having strings be byte arrays, on the other, seems to confuse me.

Use unicode strings only.

-- Serge.




From fumanchu at amor.org  Fri Jan 30 14:11:47 2004
From: fumanchu at amor.org (Robert Brewer)
Date: Fri, 30 Jan 2004 11:11:47 -0800
Subject: HowTo Search in nested lists
Message-ID: <DE1CF2B4FEC4A342BF62B6B2B334601E561CA2@opus.amorhq.net>

Florian Lindner wrote:
> >I've two nested lists which are representing a table or matrix.
> >Now I found to search for certain values in a certain column.
> >For example: column 1, search for 5, return 1, because 5 is 
> >found in the first column of the second element of t

Christopher Koppler replied:
> ...let's make a function of it that returns the list(s)
> (in case you have more than one list fitting your search
> criteria) containing the searched for value.

Good answers, Christopher. You might consider combining the several
approaches into a single one by creating an iterator; this has the
advantage of functioning identically regardless of whether the consumer
code wants one match or all matches (without traversing the entire list
if only one result is desired). Notice also that the original
requirement called for obtaining the index of the column found, not the
row.

>>> t = [[1,2,3],[4,5,6],[7,8,9],[2,8,5]]
>>>
>>> def positions(nested_list, value):
...     for row in nested_list:
...             try:
...                     yield row.index(value)
...             except ValueError:
...                     pass
...
>>> positions(t, 5).next()
1
>>> [x for x in positions(t, 5)]
[1, 2]


Robert Brewer
MIS
Amor Ministries
fumanchu at amor.org



From nuffsaid at phreaker.net  Sun Jan 18 14:52:06 2004
From: nuffsaid at phreaker.net (Nuff Said)
Date: Sun, 18 Jan 2004 20:52:06 +0100
Subject: wxwindows question
References: <mailman.320.1074000727.12720.python-list@python.org>
	<pan.2004.01.13.23.55.15.95014@phreaker.net>
	<pggid1-jb4.ln1@wintermute.g2ctech>
	<pan.2004.01.17.22.31.58.284937@phreaker.net>
	<1h6pd1-788.ln1@wintermute.g2ctech>
	<pan.2004.01.18.14.45.16.955657@phreaker.net>
	<mailman.467.1074438764.12720.python-list@python.org>
Message-ID: <pan.2004.01.18.19.52.05.917482@phreaker.net>

On Sun, 18 Jan 2004 16:13:41 +0100, Lars Heuer wrote:

> 
> Maybe WAX is an interesting project. It tries to build a wrapper ahead
> of wxPython to serve a more python-ic way to code python programs:
> 
> See:
> http://wiki.wxpython.org/index.cgi/Wax
> http://zephyrfalcon.org/labs/dope_on_wax.html
> 

Thanks for the links, Lars. I was not aware of Wax. 

It looks like a good idea to me. But the following statement
from the second link does not sound too promising:

    "Frankly, I don't have the time to work on this project
    very much. That's why I only add new features when I need 
    them."

Anyway, even if the project will not mature, it might show
a way to go with existing GUI toolkits. Write a wrapper which
is as close as possible to the original and then subclass the
widget classes in the wrapper to make their usage more pythonic.

Nuff


From __peter__ at web.de  Fri Jan 30 10:31:02 2004
From: __peter__ at web.de (Peter Otten)
Date: Fri, 30 Jan 2004 16:31:02 +0100
Subject: Adding/removing instance members
References: <c7a48802a6e65883005f04793c14b7ca@news.meganetnews.com>
Message-ID: <bvdtbm$8uh$06$1@news.t-online.com>

Ladv?nszky K?roly wrote:

> I understand instance members can be added to an object in a dynamic
> manner:
> 
> class Cc:
>   pass
> 
> oCc=Cc()
> oCc.x=10    # oCc now has a new member
> 
> What is the way to remove these instance members?
> Is it possible to add a new member whose name is given by a string?

You can delete an attribute like so:

del c.x

Use setattr/getattr/delattr() to set, get or delete attributes known only by
their name:

>>> class C: pass
...
>>> c = C()
>>> setattr(c, "x", 123)
>>> c.x
123
>>> getattr(c, "x")
123
>>> del c.x
>>> c.x
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
AttributeError: C instance has no attribute 'x'
>>> c.x = 123
>>> delattr(c, "x")
>>> c.x
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
AttributeError: C instance has no attribute 'x'

Peter


From timr at probo.com  Fri Jan  9 20:53:21 2004
From: timr at probo.com (Tim Roberts)
Date: Fri, 09 Jan 2004 17:53:21 -0800
Subject: count objects in a list and random numb gen
References: <btkodt$hrg$1@solaris.cc.vt.edu>
Message-ID: <1emuvvsb1vdj8e50npn9adu46f5lijsufs@4ax.com>

Bart Nessux <bart_nessux at hotmail.com> wrote:
>
>Also, does this bit of code look to be truely random?

The code doesn't look random at all, but of course that's not really the
question you meant to ask.

>def random_number_gen():
>    winner = []	
>    winner.append(random.sample(xrange(100000), 1))	
>    print winner	

It depends entirely on your definition of "truly random".  There is no
single definition of that phrase.

However, that specific example provides no benefit over this simpler and
more efficient code:

def random_number_gen():
    print int(random.uniform(0,100000))

which is itself just a shortcut for:

def random_number_gen():
    print int(random.random()*100000))

What are you using the random numbers for?  Tell us what you want to do
with them, and we'll suggest the right method.
-- 
- Tim Roberts, timr at probo.com
  Providenza & Boekelheide, Inc.


From brice.vissiere at costes-gestion.net  Tue Jan 20 05:46:12 2004
From: brice.vissiere at costes-gestion.net (Brice Vissi?re)
Date: 20 Jan 2004 02:46:12 -0800
Subject: Python database
Message-ID: <fa538331.0401200246.3a8da8fd@posting.google.com>

Hi python friends,

I'm currently working on a data handling tool.

For internal storage, I'm looking for a 100% python database.

I have some constraints:
 + multi-platform
 + relational with built-in query system (SQL preferably)
 + built-in string functions
 + reliable
 + fast

I don't care about:
 + network access
 + concurracy control
 + transaction commit/rollback

One of the key feature I'm looking for is direct string handling in
queries: concatenation, substring extraction, stripping, justifying,
... all we can do with python strings.

My first thought was to use Gadfly. I've downloaded and installed it.
Now, I'm  investigating the documentation and examples to find string
capabilities of Gadfly, but at first look, it seems that it will not
fit to my needs.

My problem would be solved by using a database allowing user function
creation, but I don't know whether such a tool exists.

So, have you any idea of a db tool I should use ?

Thanks in advance.

Brice


From harry.g.george at boeing.com  Mon Jan 19 07:27:27 2004
From: harry.g.george at boeing.com (Harry George)
Date: Mon, 19 Jan 2004 12:27:27 GMT
Subject: Escaping slashes (double backslash plague)
References: <mailman.500.1074516185.12720.python-list@python.org>
	<400BFC54.FC6EADF4@engcorp.com>
Message-ID: <xqxoet0nmxc.fsf@cola2.ca.boeing.com>

Peter Hansen <peter at engcorp.com> writes:

> Aloysio Figueiredo wrote:
> > 
> > I need to replace every ocurrence of '/' in s by '\/'
> > in order to create a file named s. My first attempt
> > was:
> > 
> > s = '\/'.join(s.split('/'))
> > 
> > but it doesn't work:
> > 
> > >>> s = 'a/b'
> > >>> s = '\/'.join(s.split('/'))
> > >>> s
> > 'a\\/b'
> > >>> repr(s)
> > "'a\\\\/b'"
> > >>>
> > 
> > '\/'.join() escapes the backslashes and I don't know why.
> 
> It does not, although *you* are not escaping the backslash
> yourself, and that is dangerous.  Get in the habit of always
> escaping your own backslashes, so that if you ever happen
> to use a backslash followed by one of the characters which _is_
> a valid escape sequence, you won't get confused.
> 
>  '\/' == '\\/'
> 
> but 
> 
>  '\t' != '\\t'
> 
> The first example shows two ways of writing a string with the blackslash
> character followed by a forward slash.  The second example shows a TAB
> character on the left, but a backslash plus the letter 't', on the right.
> 
> As for your apparent automatic escaping of backslashes: when you show
> results in an interactive session by just typing the expression, such as
> when you do ">>> s"   you will see the repr() of the value, not the actual
> content.  Use print instead and you'll see the difference:
> 
> >>> print s
> 
> This is all covered pretty well, I think, by the Python tutorials and
> such.  Have you gone through those?
> 
> -Peter

Did someone already mention os.path?  Since this is about filenames,
that is the best cross-platform colution.


-- 
harry.g.george at boeing.com
6-6M31 Knowledge Management
Phone: (425) 342-5601


From exarkun at intarweb.us  Tue Jan 27 09:21:38 2004
From: exarkun at intarweb.us (Jp Calderone)
Date: Tue, 27 Jan 2004 09:21:38 -0500
Subject: threads
In-Reply-To: <bv5qu7$hap$1@solaris.cc.vt.edu>
References: <bv5qu7$hap$1@solaris.cc.vt.edu>
Message-ID: <20040127142138.GB16734@intarweb.us>

On Tue, Jan 27, 2004 at 09:00:38AM -0500, Bart Nessux wrote:
> Could someone explain the concept of threads and how I might use them in 
> Python? I was a math major, not a CS major (theory instead of practice). 
> Most of my programming knowledge has grown out of system administration 
> and shell scripting, not professional software development.
> 
> How could I make this script threaded, and why should I, how would it 
> benefit me? The script already takes up 100% CPU resources, what would 
> using threads gain for me:
> 
> #!/usr/bin/python	#change this to your Python's path
> 
> def cpu_test():
>    x = 0
>    while x < 999999999:
>       x = x + 1
>       print x
>    cpu_test()
> cpu_test()
> 
> If the above is not suitable for threading, please give me a short 
> example of something that is.
> 

  On a single CPU machine, threads will never improve the performance of a
CPU-bound task.  On multiple CPU machines, threads may improve performance
of CPU-bound tasks, but only in certain very special circumstances.

  For more details about this, see http://python.org/doc/api/threads.html

  Threads are useful in ways other than exploiting multiple CPUs, though. 
They can be used to make blocking APIs appear to be asynchronous, and this
is the prime use of them in Python.  For example, DB-API 2.0 specifies an
interface for working with databases, but every method it specifies blocks. 
Threads can be used to create a new API wrapped around DB-API which
specifies all the same operations, but with an asynchronous interface,
allowing any regular DB-API 2.0 module to be used without blocking.

  This can be useful for working around third-party limitations (it would be
pretty bad if one had to rewrite every DB-API module, just to get an
asynchronous interface).  Aside from this, though, threads are only
marginally useful, and can leave to non-deterministic behavior if not used
carefully.  Think twice before throwing them into your programs.

  Jp



From tomas at fancy.org  Thu Jan 15 03:11:54 2004
From: tomas at fancy.org (Tom Plunket)
Date: Thu, 15 Jan 2004 00:11:54 -0800
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <K_YMb.10994$9k7.204413@news.xtra.co.nz>
	<bu1qq3$cu440$1@ID-207230.news.uni-berlin.de>
	<n22Nb.11299$9k7.210522@news.xtra.co.nz>
	<bu2pgs$d123a$1@ID-207230.news.uni-berlin.de>
	<4004EC9E.1E2E2893@alcyone.com>
	<23891c90.0401140223.344b22af@posting.google.com>
	<100bbb6kj9m03a4@corp.supernews.com>
	<bu4cdk$cv09p$1@ID-207230.news.uni-berlin.de>
	<1AjNb.8936$1e.894@newsread2.news.pas.earthlink.net>
	<bu56oq$d62os$1@ID-207230.news.uni-berlin.de>
Message-ID: <onic00180b7jatjes3ut0tjs4sc41vjtp4@4ax.com>

Brandon J. Van Every wrote:

> Why are you wasting our time...

Why be concerned about why someone else is wasting their time?
It's up to the reader to decide to spend time reading posts or
not, the author does not make these decisions.  So- the person
wasting their time, by definition, is the person reading the
posts in the first place and claiming that they're a waste...

-tom!


From pwatson at redlinec.com  Fri Jan 23 02:46:14 2004
From: pwatson at redlinec.com (Paul Watson)
Date: Fri, 23 Jan 2004 01:46:14 -0600
Subject: performing action on set of charecters
References: <cdac0350.0401220751.618353a3@posting.google.com>
Message-ID: <4010d131$1_1@themost.net>


"jeff" <gregadelliot at hotmail.com> wrote in message
news:cdac0350.0401220751.618353a3 at posting.google.com...
> hiya,
>
> Ive a load of binary in a file. Its 3 bit (2^3) and i wanna convert it
> to an integer.
>
> ive tried using theintergar = string.atoi(thebinary, 2), but that
> doesnt take it as 3 bit binary
>
> it has no spaces it it, so im a bit stuck as to how to do this with
> python,
>
> cheers
>
> greg

Will the following do what you want?

#! /usr/bin/env python

f = file('bits.dat', 'rb')
a = f.read()
f.close()

vals = []
for b in enumerate(a):
    v = ord(b[1])
    if (b[0] % 3) == 0:
        vals.append((v >> 5) & 0x07)
        vals.append((v >> 2) & 0x07)
        carryover = (v << 1) & 0x07
    if (b[0] % 3) == 1:
        vals.append(carryover | ((v >> 7) & 0x01))
        vals.append((v >> 4) & 0x07)
        vals.append((v >> 1) & 0x07)
        carryover = (v << 2) & 0x04
    if (b[0] % 3) == 2:
        vals.append(carryover | ((v >> 6) & 0x07))
        vals.append((v >> 3) & 0x07)
        vals.append(v & 0x07)

print vals




From tjreedy at udel.edu  Tue Jan 20 12:30:29 2004
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 20 Jan 2004 12:30:29 -0500
Subject: keynote speaker, PyCon Reminder: Early bird reg deadline 2/1
References: <mailman.541.1074598380.12720.python-list@python.org>
Message-ID: <5MCdnVrfdMM0-JDdRVn-hw@comcast.com>


"John Benson" <jsbenson at bensonsystems.com> wrote in message
news:mailman.541.1074598380.12720.python-list at python.org...
> My curiosity has been greatly piqued to see that
>
> "DC 2004 will be held March 24-26, 2004 in Washington, D.C.  The keynote
> speaker is Mitch Kapor of the Open Source Applications Foundation
> (http://www.osafoundation.org/). "
>
> Isn't Kapor the Lotus guy that tried to quash Borlands Quattro Pro
because
> it offered an alternative Lotus-user-friendly menuing structure? (see
> http://lpf.ai.mit.edu/Copyright/copyright.html)
>
> And who also claimed that "it is my heartfelt belief that many of the
> increasing number of recently issued software patents, concerning, for
> instance, fundamental techniques and artifacts of user interfaces, should
> never have been granted in the first place because of their failure to
> qualify as either novel or non-obvious. Some patents appear to preempt
> automation of common functions such as footnoting. This to me is like
> allowing a patent on the round steering wheel."
> (http://www.jamesshuggins.com/h/tek1/software_patent_kapor.htm)
>
> I'm experiencing some severe cognitive dissonance here. Can anybody help?

I am pretty sure the second item (statement) came several years after the
first.  Sometimes people learn from experience and mistakes.  I have.

tjr




From jsbenson at bensonsystems.com  Mon Jan 19 13:27:14 2004
From: jsbenson at bensonsystems.com (John Benson)
Date: Mon, 19 Jan 2004 10:27:14 -0800
Subject: keynote speaker, PyCon Reminder: Early bird reg deadline 2/1
Message-ID: <00fb01c3deb9$dcf92f60$210110ac@jsbwxp3>

My curiosity has been greatly piqued to see that

"DC 2004 will be held March 24-26, 2004 in Washington, D.C.  The keynote
speaker is Mitch Kapor of the Open Source Applications Foundation
(http://www.osafoundation.org/). "

Isn't Kapor the Lotus guy that tried to quash Borlands Quattro Pro because
it offered an alternative Lotus-user-friendly menuing structure? (see
http://lpf.ai.mit.edu/Copyright/copyright.html)

And who also claimed that "it is my heartfelt belief that many of the
increasing number of recently issued software patents, concerning, for
instance, fundamental techniques and artifacts of user interfaces, should
never have been granted in the first place because of their failure to
qualify as either novel or non-obvious. Some patents appear to preempt
automation of common functions such as footnoting. This to me is like
allowing a patent on the round steering wheel."
(http://www.jamesshuggins.com/h/tek1/software_patent_kapor.htm)

I'm experiencing some severe cognitive dissonance here. Can anybody help?





From nid_oizo at yahoo.com_remove_the_  Mon Jan 12 11:01:47 2004
From: nid_oizo at yahoo.com_remove_the_ (Nicolas Fleury)
Date: Mon, 12 Jan 2004 11:01:47 -0500
Subject: How to know if a system command doesn't exist?
Message-ID: <KxzMb.1692$PK6.16492@nnrp1.uunet.ca>

Hi,
	How can I know if a system command doesn't exist?  All the ways I have 
tried behave like if the system command was existing but returning one. 
  I don't want to sound provocative, but open in Perl returns an error 
in a command doesn't exist, so I'm sure we could have an exception in 
the same case for popen in Python?

Thx and Regards,

Nicolas



From jzgoda at gazeta.usun.pl  Sat Jan 31 15:05:18 2004
From: jzgoda at gazeta.usun.pl (Jarek Zgoda)
Date: Sat, 31 Jan 2004 20:05:18 +0000 (UTC)
Subject: Programmers Wanted for Computer Graphics Startup Near
	Philadelphia
References: <2da21d6c.0401310807.671be3b7@posting.google.com>
Message-ID: <bvh1pt$c3q$3@atlantis.news.tpi.pl>

Stan Schwartz <CGStartup at earthlink.net> pisze:

> My name is Stan Schwartz, and I'm a University of Pennsylvania 
> Ph.D. and an independent inventor.  I'm submitting two computer 
> graphics patents to the USPTO during the next several weeks.  

This sounds like one of these emails, you know them:

"""
DEAR SIR
MY NAME IS ANNE-MARIE ABAHA, I AM THE WIFE OF FORMER PRESIDENT SANI
ABAHA...
"""

-- 
Jarek Zgoda
Unregistered Linux User #-1
http://www.zgoda.biz/ JID:zgoda-a-chrome.pl http://zgoda.jogger.pl/


From mcfletch at rogers.com  Fri Jan 23 19:45:49 2004
From: mcfletch at rogers.com (Mike C. Fletcher)
Date: Fri, 23 Jan 2004 19:45:49 -0500
Subject: Python & Databases ?
In-Reply-To: <4011bcd6$0$4051$afc38c87@news.optusnet.com.au>
References: <4011bcd6$0$4051$afc38c87@news.optusnet.com.au>
Message-ID: <4011C03D.1050504@rogers.com>

Did you try a search for this?

    http://www.google.ca/search?q=python+database

seems to return some fairly relevant documents...

Short answer: yes. :)

Have fun,
Mike

Peter Moscatt wrote:

>Will Python work with any of the databases like MySQL... ?
>
>Pete
>  
>
_______________________________________

  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://members.rogers.com/mcfletch/





From kenfar42 at yahoo.com  Fri Jan  9 21:40:55 2004
From: kenfar42 at yahoo.com (Ken)
Date: 9 Jan 2004 18:40:55 -0800
Subject: Straw poll on Python performance (was Re: Python is far from a
	top performer ...)
References: <ryELb.238$tK2.228@amstwist00>
	<3fff234a$0$129$e4fe514c@dreader3.news.xs4all.nl>
	<3FFF26A1.943DEA84@engcorp.com>
Message-ID: <ea65eb54.0401091840.5160ac42@posting.google.com>

>   Do you spend a "significant" amount of time actually optimizing your 
>   Python applications?  (Significant is here defined as "more than five
>   percent of your time", which is for example two hours a week in a 
>   40-hour work week.)

Some of them.

I'm using python for data transformations:  some feeds are small and
easily handled by python, however the large ones (10 million rows per
file) require a bit of thought to be spent on performance.  However,
this isn't exactly python optimization - more like shifting high-level
pieces around in the architecture: merge two files or do a binary
lookup (nested-loop-join) one one? etc...

To make matters worse we just implemented a metadata-driven
transformation engine entirely written in python.  It'll work great on
the small files, but the large ones...

Luckily, the nature of this application lends itself towards
distributed processing - so my plan is to:
1.  check out psycho for the metadata-driven tool
2.  partition the feeds across multiple servers
3.  rewrite performance-intensive functions in c

But I think I'll get by with just options #1 and #2: we're using
python and it's working well - exactly because it is so adaptable. 
The cost in performance is inconsequential in this case compared to
the maintainability.


From dd at guv.ethz.ch  Sat Jan 31 16:47:47 2004
From: dd at guv.ethz.ch (=?iso-8859-15?Q?David_D=FCrrenmatt?=)
Date: Sat, 31 Jan 2004 22:47:47 +0100
Subject: Running External Programs from Within Python
References: <5a40bf6a.0401311123.4b7f783f@posting.google.com>
Message-ID: <opr2nthxq21bpyqk@news.swissonline.ch>

On 31 Jan 2004 11:23:42 -0800, Bob=Moore <bobmoore at pobox.com> wrote:

> Can I run (call? exec? eval?) an external program from inside a Python
> program?

Try this:

import os
os.system('notepad.exe')  # starts notepad

For complex interaction, use win32pipe (Win32 Extensions).


dave




From jjl at pobox.com  Mon Jan 12 18:26:43 2004
From: jjl at pobox.com (John J. Lee)
Date: 12 Jan 2004 23:26:43 +0000
Subject: C++ bad-mouthing (was: Why learn Python ??)
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<7xisjh1e3i.fsf@ruckus.brouhaha.com>
	<10064loqc7sd7e3@corp.supernews.com>
	<7xeku496wx.fsf@ruckus.brouhaha.com>
Message-ID: <87llocg34c.fsf@pobox.com>

Paul Rubin <http://phr.cx at NOSPAM.invalid> writes:
[...]
> C++ was motivated by the problems faced by big projects written in C.
> I'm talking about stuff like telephone switches with hundreds of
> programmers and millions of lines of code.  Even with very competent
[...]

If you're doing a comparative study of C and C++, that's true.

But many, many other languages that don't suffer from C++'s absurd
baggage also provide that kind of scalability (in terms of function
points -- nobody cares about lines of code).  The consensus seems to
be that the root causes of C++'s baggage are C-compatibility and
efficiency, not primarily the demands of large projects.


John


From deets_noospaam at web.de  Fri Jan  2 08:53:42 2004
From: deets_noospaam at web.de (Diez B. Roggisch)
Date: Fri, 02 Jan 2004 14:53:42 +0100
Subject: undo and redo ?
References: <mailman.20.1073011134.12720.python-list@python.org>
Message-ID: <bt3t56$2cs$07$1@news.t-online.com>

> I'm coding with Tkinter and i wonder whether we could get current OS'
> clipboard available, and event more, anyone can inspires me how we can
> achieve undo and redo function ?

When working with a MVC-approach, the actions you the user can invoke on the
model could be created as objects that know how to undo/invert their
effects. Then you store a list of these actions and performing undo takes
the last action and apply its inverted action to your model. Right from my
head:

class InsertAction:
  def __init__(_, index, needle):
    _.index = index
    _.needle = needle

  def do(_, haystack):
    haystack[index:index] = _.needle
  
  def undo(_, haystack):
    del haystack[_.index : _.index + len(_.needle)]


Hope this gives you an idea. You can also have to types of actions -
primitive and complex. Performing undo will then undo all primitve actions
until the action queue is empty or a complex actions is reached. This
allows e.g. in a text-editor to perform undo subsequently inserted
characters at once.

HTH,

Diez


From mwh at python.net  Thu Jan 15 06:59:50 2004
From: mwh at python.net (Michael Hudson)
Date: Thu, 15 Jan 2004 11:59:50 GMT
Subject: C++ bad-mouthing (was: Why learn Python ??)
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<7xisjh1e3i.fsf@ruckus.brouhaha.com>
	<10064loqc7sd7e3@corp.supernews.com>
	<7xeku496wx.fsf@ruckus.brouhaha.com>
	<donn-9D2291.16343412012004@nntp6.u.washington.edu>
	<7xhdz08xgy.fsf@ruckus.brouhaha.com> <1073978329.887910@yasure>
	<87brp7agl7.fsf@pobox.com> <7xvfnfmzy8.fsf@ruckus.brouhaha.com>
	<878yka2sze.fsf@pobox.com>
Message-ID: <m3ptdlv2ve.fsf@pc150.maths.bris.ac.uk>

jjl at pobox.com (John J. Lee) writes:

> Not sure what the goals were, but I'm not sure they were to compete
> with Netscape and IE.  CNRI funding -- "R" for research -- seems to
> imply I do remember correctly (one of us should really check the
> facts here... oh well, it's USENET ;-).

I thought the purpose of grail was a test bed for research into mobile
agents, that being what most of the PythonLabs flok were working on at
CNRI.  I'm probably no better informed than the rest of this thread,
though :-)

Cheers,
mwh

-- 
  Our Constitution never promised us a good or efficient government,
  just a representative one. And that's what we got.
      -- http://www.advogato.org/person/mrorganic/diary.html?start=109


From user at domain.invalid  Mon Jan 26 15:04:16 2004
From: user at domain.invalid (user at domain.invalid)
Date: Mon, 26 Jan 2004 20:04:16 GMT
Subject: Deleting objects
Message-ID: <a33a46fe50e2ab07720a1118aa22d576@news.teranews.com>

Say I have a database object 'db',
that contains table objects, that contain field
objects so that I can do things like this:

print db.table.field.value()


Now, after plundering the database for a while,
the db objects heads a tree of lots of data.

If I want to "reset" the object so that I get
all of my memory back, can I just do:

	del db

or maybe:

	for t in db.tables:
		del t
	
and expect that I have cleaned up all of my
memory?

After writing this out, I see that the answer
is clearly yes, but I will post anyway.

Thanks

Toby



From andy47 at halfcooked.com  Fri Jan  9 07:59:40 2004
From: andy47 at halfcooked.com (Andy Todd)
Date: Fri, 09 Jan 2004 12:59:40 +0000
Subject: [OT] Database reporting software
In-Reply-To: <btki05$7d0$1@news.freedom2surf.net>
References: <btki05$7d0$1@news.freedom2surf.net>
Message-ID: <btm8s3$5df$1@sea.gmane.org>

Steve Horsley wrote:
> I have an existing system working on MS Access, and software that 
> regularly logs events into it (and deletes old events after a year).
> 
> Now need to move to real servers, probably Solaris though possibly 
> Linux. Modifying the software to update the database (maybe mySQL or 
> Oracle) contents is easy enough, but how do I produce reports 
> (statistics and summaries) on the database contents?
> 
> I could contemplate web based or application based report generation, 
> but are there easy to use draggy-droppy report designing applications 
> around? Just the names would enable me to look them up.
> 
> I am struggling with OpenOffice.org at the moment, trying to see if it 
> can do what I'm looking for, but it doesn't seem to be able to do GROUP 
> BY and SUM() - simple aggregation stuff.
> 
> All suggestions would be very welcome.
> 
> Steve

The only product I've used is Crystal reports. There is a cost factor 
involved but it is pointy clicky, supports 'proper' SQL like summing and 
group bys and isn't too expensive.

The product page is here : 
http://www.businessobjects.com/products/reporting/crystalreports/default.asp

Regards,
Andy
-- 
--------------------------------------------------------------------------------
 From the desk of Andrew J Todd esq - http://www.halfcooked.com/




From robin at jessikat.fsnet.co.uk  Sat Jan  3 17:58:01 2004
From: robin at jessikat.fsnet.co.uk (Robin Becker)
Date: Sat, 3 Jan 2004 22:58:01 +0000
Subject: Lists are weird when they are instance members
References: <ffHJb.5475$HL3.4277@newssvr29.news.prodigy.com>
Message-ID: <2QeszXA5j09$EwLl@jessikat.fsnet.co.uk>

In article <ffHJb.5475$HL3.4277 at newssvr29.news.prodigy.com>, python
newbie <mesteve_b at hotmail.com> writes

I think you're not grokking that using

class A:
  mylist = []

makes mylist a class attribute ie all instances share the same version
of mylist. To get an instance version you need to assign self.mylist.
That would normally be done using an __init__method. so

class A:
  def __init__(self):
    self.mylist = []

then each instance sets up its own empty list at creation time.

Hope that helps.
-- 
Robin Becker


From james at logicalprogression.net  Thu Jan 22 12:12:13 2004
From: james at logicalprogression.net (James Henderson)
Date: Thu, 22 Jan 2004 17:12:13 +0000
Subject: What is object()
In-Reply-To: <20040122154420.6597.qmail@web61110.mail.yahoo.com>
References: <20040122154420.6597.qmail@web61110.mail.yahoo.com>
Message-ID: <200401221712.13248.james@logicalprogression.net>

On Thursday 22 January 2004 3:44 pm, Hameed Khan wrote:
> hi,
>   i was reading library refrence manual. there i found
> object() function. they says in library refrence that
>         "Return a new featureless object. object() is
> a base for all new style classes. It has the methods
> that are common to all instances of new style
> classes."
>
> My questions are whats the use of this function and
> the object returned by it? and what are new style
> classes?.
>
> Thanks,
> Hameed Khan

Roughly, the purpose of object is that inheriting from it makes a new-style 
class.  For a description of new-style classes see:

http://www.python.org/2.2.3/descrintro.html

and maybe also:

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

Also see the ongoing argument about the definition of a new-style class on 
python-dev under the thread "Hot-To Guide for Descriptors - Nits! :-)"

James
-- 
James Henderson, Logical Progression Ltd.
http://www.logicalprogression.net/
http://sourceforge.net/projects/mailmanager/




From exarkun at intarweb.us  Fri Jan 16 14:18:53 2004
From: exarkun at intarweb.us (Jp Calderone)
Date: Fri, 16 Jan 2004 14:18:53 -0500
Subject: Bug or feature?
In-Reply-To: <200401161613.06481.james@logicalprogression.net>
References: <bu58st$1ha3$1@news.rtcomm.ru> <ZvidncM7G8svuZrdRVn-jA@comcast.com>
	<bu8t4h$15d$1@news.rtcomm.ru>
	<200401161613.06481.james@logicalprogression.net>
Message-ID: <20040116191853.GA27129@intarweb.us>

On Fri, Jan 16, 2004 at 04:13:06PM +0000, James Henderson wrote:
> On Friday 16 January 2004 2:44 pm, Alexey Nezhdanov wrote:
> <snip>
> > I know the case where such python behaivoir causes hard-to-catch problems.
> > I do not know any case (anybody knows? please give example) where such
> > "feature" may be useful.
> >
> > So I proposing to make a change into python and reverse the order of
> > calculations.
> > Just for sure:
> > === Order used now ===
> > ## a+=a.Sub(b)
> > 1. evaluate value of 'a'
> > 2. evaluate value of 'a.Sub(b)'
> > 3. evaluate the sum
> > 4. store the result into 'a'
> > === Proposed order ===
> > ## a+=a.Sub(b)
> > 1. evaluate value of 'a.Sub(b)'
> > 2. evaluate value of 'a'
> > 3. evaluate the sum
> > 4. store the result into 'a'
> 
> -1
> In any language that uses such an operator I would expect:
> 
> a += b
> 
> to be synonymous with:
> 
> a = a + b

  Of course, it should be noted that, in Python, "a += b" is only sometimes
synonymous with "a = a + b".  The rest of the time, it's hard to say what it
is synonymous with :)

> 
> You are suggesting that it should mean:
> 
> a = b + a
> 
> It is not like Python to attach its own idiosyncratic semantics to operators 
> already well known from other languages.  I think this would catch a lot of 
> people out.
> 

  Definitely.  Consider tuple += tuple.  It would not only be idiosyncratic,
but outright surprising and irrational if using += on (1, 2) and (3, 4)
resulted in (3, 4, 1, 2).

> Of course, it's probably best to avoid writing code where the order makes a 
> difference. :)

  Amen.  Write simple code and all those who follow in your footsteps will
thank you.

  Jp



From shian5.bbs at wretch.csie.nctu.edu.tw  Sat Jan 10 23:26:11 2004
From: shian5.bbs at wretch.csie.nctu.edu.tw (¯u¤ß)
Date: 11 Jan 2004 04:26:11 GMT
Subject: delete file with zipfile
Message-ID: <4ADOiZ$6GG@wretch.csie.nctu.edu.tw>

I wrote some scripts to process a zip-file with zipfile
I know how to add a file to a zip-file
but I couldn't find the way to delete it
Anyone know how to remove a file from a zip-file with zipfile?
--
?????????????????????????????????????
?????BBS telnet://wretch.twbbs.org  ????  ?? ?????????
?????????????????????????????????????
?????????????????????????????????????
???????????????????218-166-150-104.HINET-IP.hinet.net?


From dietrich at zdome.net  Fri Jan 23 19:05:25 2004
From: dietrich at zdome.net (Dietrich Epp)
Date: Fri, 23 Jan 2004 16:05:25 -0800
Subject: [OPINION] - does language really matter if they all do the
	samething?
In-Reply-To: <69A0D4AB81C51447AD6BA387782B8D64093D8A@midl-mail4.etcconnect.com>
References: <69A0D4AB81C51447AD6BA387782B8D64093D8A@midl-mail4.etcconnect.com>
Message-ID: <028FD9F0-4E01-11D8-BB78-0003934ACDEC@zdome.net>


On Jan 23, 2004, at 10:59 AM, Christian Wilcox wrote:

> You might find this http://www.artima.com/intv/craft.html artima.com 
> interview (especially the section "Learning Languages") with Yukihiro 
> Matsumoto, creator of Ruby, interesting.  He discusses how certain 
> programming languages focus on specific paradigms, which could allow a 
> programmer to think in ways they may not otherwise.
>
> Python doesn't necessarily force any specific paradigm, which is one 
> of it's selling points, IMO.

I've been programming a lot of different things lately, and sometimes I 
do feel constrained by Python.  The only way that I can program so I 
don't feel constrained is to use multiple languages.  Sometimes I 
really just want to curry my functions in Python or Lisp, sometimes I 
really want to have Python's or Ruby's objects in Lisp or C, sometimes 
I want to write a macro in languages other than Lisp, and sometimes I 
even want to be able to do pointer arithmetic in Python.

Python's strength is that it encourages paradigms that are relatively 
concise and easy to read and write, and the paradigms it uses coincide 
very nicely with many programming projects.  But there are many 
projects which are just not nice to write in Python.

Example: I wrote a project in Python which reads some data files and 
uses them to make a decision (sort of).  I got it to about 90% 
functionality, and realized that the last 10% was extremely difficult 
to do with Python.  After writing one Lisp macro of exactly 13 lines, I 
rewrote the entire program, incorporating the data into Lisp files 
which were not only much shorter, but much clearer, easier to read, 
etc.  I just couldn't think of a way to write this program in Python 
without a lot of code replication.

Similarly, most scripting and many other projects I'd never consider 
doing in anything but Python, except the occasional hardcore text 
processor which causes physical pain to write in anything but Perl or 
Ruby.

<abestos>
Python seems to take the middle ground.  It's build from a procedural 
standpoint, in an environment where most things are objects and some 
are functions.  It's not what I'd choose as an example of an object 
oriented language.  There are no messages, only function calls, so you 
can't capture them.  The plus side is that methods behave exactly the 
same as functions, this makes the language simple and the two ideas 
interchangeable.  You can set an object's method to a function.  The 
minus side is that the paradigm of sending a message "to" an object 
doesn't exist, and anyone coming from Smalltalk or even Objective-C 
might miss that and feel constrained (I did).  But if Python were 
really object-oriented like that, then it wouldn't have Python's 
simplicity any more.
</abestos>




From bkc at Murkworks.com  Fri Jan 23 09:14:19 2004
From: bkc at Murkworks.com (Brad Clements)
Date: Fri, 23 Jan 2004 09:14:19 -0500
Subject: Python Consultants?
References: <8e198b65.0401221315.6d5cb3fe@posting.google.com>
Message-ID: <bura7s$ce7$1@sea.gmane.org>

"Dan" <arsanalytica at yahoo.com> wrote in message
news:8e198b65.0401221315.6d5cb3fe at posting.google.com...

> Here are a pair XML problems that are available:
>
> #1) Setup to convert these xml files
>
http://www.gothamanalytics.com/PairTools/geturl?url=http://app.quotemedia.co
m/data/getHistory.xml&symbol=SUNW
>
http://www.gothamanalytics.com/PairTools/geturl/?url=http://app.quotemedia.c
om/data/getQuotes.xml?symbols=SUNW
> into a vector of open,close,volume information suitable for use with a
> numerical Python module.  Doing this quickly is a plus.

Can you better define "vector".

Do you want a Numeric array, or a list or tuple? Do you want a different
vector for each of (open, close, volume) (ie, 3 arrays)
or do you want the three values stuck into one tuple/list element and that
element put into an array/list?

What do you mean by "quickly"?  You haven't given an indication of the size
of the file you wish to process. The URL shown above produces a rather small
file. But are you planning to process megabytes of data with multiple
symbols over long periods of time?

SAX can easily parse those xml files without loading them entirely in
memory.

What platform are you running on? Maybe it's quicker to use a C extension
like libxml2 if you're going to parse extremely large files. You haven't
provided enough information about your problem domain.

> #2) Expose the Salesforce.com SOAP functionality from salesforce.com
> generated WSDL files, here is an example WSDL
> http://gothamanalytics.com/Ex/enterprise.wsdl
> See sforce.com for more info on the salesforce.com API.  A Python
> solution is preferred but a work around which uses Java and the
> Salesform.com Apache Axis library and an appropriate gateway from
> python might also be acceptable.  Results from an attempt at using ZSI
> to process the WSDL file is appended to this message.

I think there are others on this list who are (or will soon) need to work
with Salesforce.com.

I have been evaluating it and DreamFactory for a few months, but I don't
have any clients at the moment that need to use either.

If you're just doing "bulk transfer" of data, you might consider a hybrid
approach using JyRetic EAI Server http://sourceforge.net/projects/retic

Otherwise, continued work on the pywebsvcs-talk list could arrive at a
solution in time. In fact, I think I saw a post from you on the list this
week.

If your business has resources that can be applied to fixing problems in ZSI
or SOAPPY that'd be a good way to solve your immediate problem, and "giving
back" to the community.

-Brad


> --
> http://mail.python.org/mailman/listinfo/python-list
>






From sross at connectmail.carleton.ca  Fri Jan 30 21:41:10 2004
From: sross at connectmail.carleton.ca (Sean Ross)
Date: Fri, 30 Jan 2004 21:41:10 -0500
Subject: Python vs. Io
References: <711c7390.0401291301.3f95794@posting.google.com>
	<D6wSb.6538$qU3.576425@news20.bellglobal.com>
	<711c7390.0401301726.3e38da27@posting.google.com>
Message-ID: <KCESb.6856$qU3.625838@news20.bellglobal.com>

"Daniel Ehrenberg" <LittleDanEhren at yahoo.com> wrote in message
news:711c7390.0401301726.3e38da27 at posting.google.com...
[snip example]
> Does that illustrate it well? I know the difference between := and =
> is annoying, but you'll get used to it, and it allows really cool
> things to be done with scopes and inheretance.

I think I get the idea. Let's see:

P = Object clone do(  # saw do() used in iolanguage mail archive
    allocated = 0
    init = method(
        id := allocated    # semi-colons required?
        allocated += 1
    )
    howMany = method(return allocated)
)

x := P clone
y := P clone
write("allocated? ", P howMany())
# output ...
# allocated? 2

Correct?

Thanks for making me aware of this language, it has some
interesting ideas. I'm not annoyed by the difference between :=
and =. I understand the issue(s) they're trying to solve: you don't
need to declare local variables, or use self, explicitly. I don't have
a problem with that. I imagine it could lead to subtle bugs (if you
update a slot when you meant to set a new one), but that is only
speculation on my part.

I'm not a fan of the parenthesis (which might be expected from
a Python user - love that significant whitespace ;). I'm also not a
big fan of 'clone', I'd rather see 'new', but I do understand why
'clone' is more apt. Of course, in this language, you could always
just say

Object new = Object getSlot("clone")
P = Object new
...

I can appreciate the flexibility of that.








From Paul.Moore at atosorigin.com  Tue Jan  6 12:09:08 2004
From: Paul.Moore at atosorigin.com (Moore, Paul)
Date: Tue, 6 Jan 2004 17:09:08 -0000
Subject: PEP 324: popen5 - New POSIX process module
Message-ID: <16E1010E4581B049ABC51D4975CEDB8803060D8E@UKDCX001.uk.int.atosorigin.com>

From: Peter Astrand [mailto:astrand at lysator.liu.se]
>> The biggest issue, though, is that args as a sequence of program
>> arguments is very Unix-specific. This is a big incompatibility between
>> Unix and Windows - in Windows, the low-level operation (CreateProcess)
>> takes a *command line* which is passed unchanged to the child process. 
>> The child then parses that command line for itself (often, but not
>> always, in the C runtime). In Unix, exec() takes an *argument list*. 
>> If you have a command line, you have to split it yourself, a task
>> which is usually delegated to /bin/sh in the absence of anything else. 
>> This is hard to handle portably.

> Oh, I've never thought of this. 

It's a major issue. I've been porting process-creation code from Unix to
Windows for a long while now, and there simply isn't a good, compatible,
answer.

> I've found some documentation on this.  
> http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vccelng/htm/progs_12.asp
> is interesting. It describes how the MS C runtime translates the
> commandline to an argv array. Let's call this "Algorithm A". 

The problem here is that not all programs use the MSVC runtime.
Borland C uses a subtly different algorithm, and programs written in
other languages often don't use an argv concept at all.

Even adding quotes when not necessary can cause certain programs to
fail.

> When passed a sequence, popen5 should translate this sequence into a
> string by using algorithm A backwards. This should definitely be 
> implemented in popen5. 

> There are two more cases:
>
> 1) Should popen5 support a string argument on Windows?
>
> and
>
> 2) Should popen5 support a string argument on UNIX?


> You seems to have made up your mind about case 1, and even thinks that 
> this should be "recommended". I'm not that sure. 

Using a list works most of the time, but can break in subtle, and surprising
ways. I have coded "Algorithm A in reverse" a number of times, and *always*
managed to construct a program that "broke". With Windows GUI programs
(not the key use case for this module, I admit) it's not remotely hard to
construct a broken example :-(

> What about case 2 ? This could be supported by converting the string to an 
> sequence using Algorithm A. One large problem though is that Algorithm A 
> is *not* the same as a typical shell uses. For example, an OS X user might 
> want to do:
>
>    Popen("ls '/Applications/Internet Explorer'")
>
> This won't work if we use Algorithm A. 
>
> If we extend Algorithm A to support single quotes as well, this will not 
> work as expected on Windows:
>
>    Popen("echo 'hello'")
>
> Sigh.

Sigh indeed. It's just not cross-platform no matter how you try. BTW, your
echo example won't work in any case on Windows, as "echo" is a shell
builtin, and not available as a standalone executable. So on Windows,
you'd need

    Popen("cmd /c echo hello")

And don't get me started on how cmd/c's quoting peculiarities can make this
even worse :-(

> The only drawback with "process" is that it is already in use by 
> http://starship.python.net/~tmick/#process. 

Ah. I wasn't aware of that module. I wonder whether Trent would be willing
to combine his code and yours somehow, and donate the name?

Paul



From maarten at remove_this_ws.tn.tudelft.nl  Thu Jan 15 08:27:08 2004
From: maarten at remove_this_ws.tn.tudelft.nl (Maarten van Reeuwijk)
Date: Thu, 15 Jan 2004 14:27:08 +0100
Subject: Newbie: how to write modules without C
References: <bu5s3o$70t$1@news.tudelft.nl>
	<40069088$0$327$e4fe514c@news.xs4all.nl>
Message-ID: <bu64fb$9l7$1@news.tudelft.nl>

> I strongly recommend you read chapter 6, Modules, of the tutorial:
> http://www.python.org/doc/current/tut/node8.html

This is exactly what I couldn't find before, thanks!

-- 
===================================================================
Maarten van Reeuwijk                        Heat and Fluid Sciences
Phd student                             dept. of Multiscale Physics
www.ws.tn.tudelft.nl                 Delft University of Technology


From pythonguy at Hotpop.com  Tue Jan 13 05:49:32 2004
From: pythonguy at Hotpop.com (Anand Pillai)
Date: 13 Jan 2004 02:49:32 -0800
Subject: Python Optimization
Message-ID: <84fc4588.0401130249.e6ad2bf@posting.google.com>

Interesting article in Kansas State University website
on Python internals. Thought I should post it here.

http://www.cis.ksu.edu/VirtualHelp/Info/develop/cmu-user.info.Source_Optimization.html

-Anand


From xpythonist at yahoo.com.br  Thu Jan 22 04:50:46 2004
From: xpythonist at yahoo.com.br (=?iso-8859-1?q?Aloysio=20Figueiredo?=)
Date: Thu, 22 Jan 2004 06:50:46 -0300 (ART)
Subject: newbie: prefix operator "**"
In-Reply-To: <200401211615.09463.james@logicalprogression.net>
Message-ID: <20040122095046.3203.qmail@web21506.mail.yahoo.com>

The ** operator is also useful when you have a
dictionary and want to unpack it to pass as keyword
arguments to a function:

>>> def f(a,b):
...   print a, b
...
>>> f(1,'foo')
1 foo
>>> f(a=1, b='foo')
1 foo
>>> d = {'a':1, 'b':'foo'}
>>> f(d)
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
TypeError: f() takes exactly 2 arguments (1 given)
>>> f(**d)
1 foo
>>>

Aloysio

 --- James Henderson <james at logicalprogression.net>
escreveu: > On Wednesday 21 January 2004 3:59 pm, Jeff
Epler
> wrote:
> > On Wed, Jan 21, 2004 at 10:33:49AM -0500,
> Christian Jauvin wrote:
> > > Hello,
> > >
> > > I am playing with some classes in the Tkinter
> module
> > > to learn some GUI basics.
> >
> > Take a look at the Tutorial, section 4.7.2.  The
> ** prefix for an
> > argument means that it accepts arbitrary keyword
> arguments.
> >
>
http://python.org/doc/tut/node6.html#SECTION006720000000000000000
> >
> > Example:
> >
> > def f(**kw):
> >     print kw
> >
> > >>> f(a=1, b=2)
> >
> > {'a': 1, 'b': 2}
> 
> Since Jeff beat me to it with his reply and
> reference to the tutorial I'll 
> just add that ** is also used in a sort of reverse
> sense when calling - as 
> opposed to defining - a function, so that you can
> pass a dictionary to a 
> function and have all the key-value pairs treated as
> keyword arguments.  This 
> is called the extended call syntax and might be
> useful, for example, if a 
> function with keyword arguments dictionary wants to
> pass these values on to 
> another function, e.g.:
> 
> def f(**kw):
>     print kw
> 
> def g(**kw):
>     f(**kw)  # extended call sytax
> 
> g(a=1, b=2)
> 
> With the same result as above.  Extended call sytax
> is most useful to avoid 
> the use of the deprecated apply().  See:
> 
>
http://www.python.org/doc/current/lib/non-essential-built-in-funcs.html
> 
> under apply()
> 
> and:
> 
> http://www.python.org/doc/current/ref/calls.html
> 
> Finally, as two stars are used for arbitrary
> dictionaries single stars are 
> used for arbitrary sequences.
> 
> James
> -- 
> James Henderson, Logical Progression Ltd.
> http://www.logicalprogression.net/
> http://sourceforge.net/projects/mailmanager/
> 
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list 

______________________________________________________________________

Yahoo! GeoCities: a maneira mais f?cil de criar seu web site gr?tis!
http://br.geocities.yahoo.com/



From goodger at python.org  Thu Jan 22 10:05:50 2004
From: goodger at python.org (David Goodger)
Date: Thu, 22 Jan 2004 10:05:50 -0500
Subject: PyCon2004 - Where to stay, which airport?
In-Reply-To: <buoo60$54m$1@sea.gmane.org>
References: <buoo60$54m$1@sea.gmane.org>
Message-ID: <400FE6CE.30403@python.org>

Brad Clements wrote:
> I think this year I might be able to make it to my first Python
> conference.

It'll be my first Python conference too.

> Anyway, where should I stay that's cheap but not too yucky? I don't
> mind riding the subway. I might come early for sprints or the
> Smithsonian.

<plug> I'll be coaching a sprint on Docutils:
<http://www.python.org/cgi-bin/moinmoin/DocutilsSprint>.
You're welcome to join in! </plug>

> I couldn't find recommended lodgings on the PyCon wiki.

The main wiki page has links:

http://www.python.org/cgi-bin/moinmoin/PyConDC2004

 > Is DCA the correct airport?

Yes, but the others are OK too.  See the PyConForCheap link for more
about airports.

-- David Goodger




From dietrich at zdome.net  Sun Jan 25 18:34:58 2004
From: dietrich at zdome.net (Dietrich Epp)
Date: Sun, 25 Jan 2004 15:34:58 -0800
Subject: [OPINION] - does language really matter if they all do the
	samething?
In-Reply-To: <bv0mg2$fai$1@panix1.panix.com>
References: <69A0D4AB81C51447AD6BA387782B8D64093D8A@midl-mail4.etcconnect.com>
	<58587302-4E30-11D8-8FAB-0003934ACDEC@zdome.net>
	<4012FEB1.5000106@prescod.net>
	<mailman.758.1075023273.12720.python-list@python.org>
	<bv0mg2$fai$1@panix1.panix.com>
Message-ID: <1692AB60-4F8F-11D8-BCE5-0003934ACDEC@zdome.net>


On Jan 25, 2004, at 7:14 AM, Aahz wrote:

> Well, choose_random_assoc() needs to dispatch on functions rather than
> values.  That will recurse only one level, and only in
> choose_random_assoc().  You'll also need to identify tuples in order to
> pass in values.  Here's a rewrite of Paul's function that shows roughly
> what you need to do:
>
> function random_sword_magic_power(quality):
>     return choose_random_assoc(
>         selector = (quality, (poor, medium, good)),
>         properties = {
>             (5, 0, 0): glows_in_the_dark,
>             (3, 3, 0): magically_silent,
>             (1, 5, 1): (elemental_power, choice([earth, water, air, 
> fire]),
>             (0, 2, 4): magical_keen_edge,
>             (0, 0, 2): ((random_sword_magic_power, medium),
>                 (random_sword_magic_power, medium)),
>             }
>
> Quite frankly, though, for this kind of application, I probably would
> choose to write a domain-specific language (more precisely, a "smart"
> config file format).  That would make it easier for someone who wasn't 
> a
> programmer to add functionality.  As I said earlier, I don't think the
> fact that Lisp makes it easy to directly express this idiom makes up 
> for
> its other faults.

Oh, I see.  I could write...

from random import *

def apply(x):
     x[0](*x[1:])

def apply_random(list):
     return apply(choose_random(list))

def choose_random(list):
     total = 0
     for probability, result in list:
         total += probability
     which = randint(total)
     for probability, result in list:
         if which < probability:
             return result
         which -= probability
     raise ValueError, "Probabilities sum to zero."

def random_sword_magical_power(quality):
     which_column = { poor:0, medium:1, good:2 }[quality]
     table = [
         ((5, 0, 0), (glows_in_the_dark,)),
         ((3, 3, 0), (magically_silent,)),
         ((1, 5, 1), (elemental_power, choice([earth, water, air, 
fire]))),
         ((0, 2, 4), (magical_keen_edge))
         ((0, 0, 2), (lambda: random_sword_magical_power(medium)
                            + random_sword_magical_power(medium)))
     ]
     table = [ (p[which_column], v) for (p,v) in table ]
     return apply_random(table)

...am I making this clearer?

Hint 1: What language is famous for its built-in function 'apply'?
Hint 2: What happens if you remove the commas in the table.

You may choose to write a domain-specific language.  This was my 
original idea as well.  The early versions of this program had the 
tables in XML files, and the Python code was short and sweet.  However, 
as I started writing some of the more complicated tables, I needed to 
write hooks in the XML back into Python, and eventually one of the XML 
files saw the presence of a few 'lambdas' here and there.  I changed 
the XML files, I refactored the Python code, but XML didn't integrate 
code well enough with its data, and Python didn't integrate data well 
enough with its code.  The Lisp code that replaced everything is 
smaller, faster, easier to read, and easier to write.

My only point is that Python is not the right tool for every project.  
I only see two ways to make this read well in Python: either add macros 
(like Lisp, NOT like C) or add blocks that don't use lambda (like 
Smalltalk or Ruby).  I prefer Python's syntax the way it is.




From usenet at mail-2-me.com  Tue Jan 27 04:44:48 2004
From: usenet at mail-2-me.com (Dirk Hagemann)
Date: 27 Jan 2004 01:44:48 -0800
Subject: NetGetAnyDCName() - get PDC of a foreign WinNT-domain
References: <mailman.642.1074780151.12720.python-list@python.org>
Message-ID: <a37aa972.0401270144.339e8ed6@posting.google.com>

Thanks for your help, but that does not work. I get an error message
which sais it can't reach the domain.
But I'm sure did not make an syntax-error, because if I enter my own
domain it works.

Any other idea?

Dirk


Tim Golden <tim.golden at viacom-outdoor.co.uk> wrote in message news:<mailman.642.1074780151.12720.python-list at python.org>...
> >Hi!
> >
> >I'm trying to get the PDC-Computername of a foreign WinNT-domain, but
> >I only managed to get the PDC of my own domain with this code:
> >pdc=win32net.NetGetAnyDCName()
> 
> If you don't specify any params to that call, win32net will assume
> you're looking at your own domain. It can take two params: server & domain.
> 
> If you do this:
> 
> pdc = win32net.NetGetAnyDCName (None, "name_of_other_domain")
> 
> it should work.
> 
> TJG
> 
> 
> ________________________________________________________________________
> This e-mail has been scanned for all viruses by Star Internet. The
> service is powered by MessageLabs. For more information on a proactive
> anti-virus service working around the clock, around the globe, visit:
> http://www.star.net.uk
> ________________________________________________________________________


From bwm at acm.org  Fri Jan 16 12:01:21 2004
From: bwm at acm.org (Bernhard Mulder)
Date: Fri, 16 Jan 2004 17:01:21 GMT
Subject: SimpleXMLRPCServer
In-Reply-To: <mailman.432.1074263943.12720.python-list@python.org>
References: <YKNNb.213874$0P1.42736@twister.nyc.rr.com>
	<mailman.432.1074263943.12720.python-list@python.org>
Message-ID: <BNUNb.1731$dC4.1227@newssvr29.news.prodigy.com>

Here is an example of a server which runs as long as self.running
is set:

class SimpleXMLRPCServer_with_stop(SimpleXMLRPCServer.SimpleXMLRPCServer):

    def __init__(self, *args, **kwds):
        self.running = True
        SimpleXMLRPCServer.SimpleXMLRPCServer.__init__(self, *args, **kwds)

    def serve_while_running_is_set(self):
       """Server while running is set."""
       while self.running:
          self.handle_request()

Skip Montanaro wrote:
>     Maxim> is there a way to process actions other than XML-RPC requests
>     Maxim> using SimpleXMLRPCServer? Is is possible to do something like
> 
>     Maxim> server = SimpleXMLRPCServer(('', 8000))
>     Maxim> server.register_instance(MyClass())
>     Maxim> while(1)
>     Maxim>  if(checkSomeCondidion()):
>     Maxim>   server.serve_once()
>     Maxim>  else: server.stop()
> 
> You should be able to override the serve_forever() method.
> 
> Skip
> 



From jzgoda at gazeta.usun.pl  Thu Jan 15 13:12:24 2004
From: jzgoda at gazeta.usun.pl (Jarek Zgoda)
Date: Thu, 15 Jan 2004 18:12:24 +0000 (UTC)
Subject: [OT] AS/400
References: <mailman.352.1074092092.12720.python-list@python.org>
	<bu4a5n$k9$6@atlantis.news.tpi.pl> <4005cd03@news.mt.net.mk>
Message-ID: <bu6l68$8uv$1@atlantis.news.tpi.pl>

?????? ? <mk at net.mail.penguinista> pisze:

>> (will not mention that it works on AS/400, the best
>> minicomputer(!) ever made).
> 
> Why is it the best minicomputer ever made?
> I really want to know!

Since nobody ever produced any other. Only IBM produced machines that
can be called "midrange" (something between microcomputer and "real
computer", the famous S/390 mainframe). They still use this terminology.

-- 
Jarek Zgoda
Unregistered Linux User #-1
http://www.zgoda.biz/ JID:zgoda-a-chrome.pl http://zgoda.jogger.pl/


From news2 at mystrobl.de  Tue Jan 20 17:39:32 2004
From: news2 at mystrobl.de (Wolfgang Strobl)
Date: Tue, 20 Jan 2004 23:39:32 +0100
Subject: py2exe 0.5.0 (finally) released
References: <y8s7aeps.fsf@python.net>
	<8a27e309.0401201304.7ee860b0@posting.google.com>
Message-ID: <1ebr001fkuq85al2i8c26ejceu8qvedmdb@4ax.com>

ny_r_marquez at yahoo.com (R.Marquez):

>Maybe I'm missing it, but I don't see how to specify an icon to use
>for the exe.  Is that funtionality no longer available?

icon_resources works for me, like so:

setup( windows = ["wxKnife.py",
    {"script":"wxKnife.py","icon_resources":[(1,"images/app2.ico")]}],
    console=["installed_updates.py","installed_sw.py"],
    data_files=[("images",["images/app2.ico",]),]
    )

-- 
Wir danken f?r die Beachtung aller Sicherheitsbestimmungen


From mike at odyne.com  Mon Jan 19 10:22:36 2004
From: mike at odyne.com (Mike)
Date: 19 Jan 2004 07:22:36 -0800
Subject: Printing variable names
References: <a6d1df44.0401181122.56f1f091@posting.google.com>
	<mailman.479.1074455535.12720.python-list@python.org>
	<a6d1df44.0401181628.6d1e1f86@posting.google.com>
	<buf8u7$pk9$03$1@news.t-online.com>
Message-ID: <a6d1df44.0401190722.2ab7150b@posting.google.com>

That makes life easy.  Problem solved!  Thanks all for the help.

Mike



> 
> You're lucky, functions "know" their name:
> 
> >>> def func1(): pass
>  ...
> >>> def func2(): pass
>  ...
> >>> for f in [func1, func2]:
> ...     print f.__name__
> ...
> func1
> func2
> 
> Peter


From paul.moore at atosorigin.com  Fri Jan 23 09:24:17 2004
From: paul.moore at atosorigin.com (Paul Moore)
Date: 23 Jan 2004 06:24:17 -0800
Subject: Is twistedmatrix.com dead?
Message-ID: <182bcf76.0401230624.7e468275@posting.google.com>

I haven't been able to get through to twistedmatrix.com for a few days
now. I know they had a problem a couple of days ago, but is there
still a problem, or has something at between me and them simply failed
to notice they are back?

Thanks,
Paul


From no.mail at available.net  Sun Jan 25 21:32:37 2004
From: no.mail at available.net (Georgy)
Date: Mon, 26 Jan 2004 02:32:37 GMT
Subject: Mod_python on Windows Troubles
References: <mailman.769.1075055393.12720.python-list@python.org>
	<bv1par$ctl$2@news.service.uci.edu>
Message-ID: <9%_Qb.14588$YG.883493@twister.southeast.rr.com>

No problem with *.so. My config: Windows XP, Apache 2.0.47 (Win32) mod_python/3.1.2b Python/2.3.2
mod_python.so 3.1.1b (hmm... it reports 3.1.2b but the file's version says 3.1.1b) is 114,688 bytes
The error message means probably that your mod_python.so and your
%SystemRoot%\system32\python22.dll or python23.dll files are not compatible.

Georgy


"Josiah Carlson" <jcarlson at nospam.uci.edu> wrote in message news:bv1par$ctl$2 at news.service.uci.edu...
|
| > modules/mod_python.so" to httpd.conf, the Apache service refuses to
| > start with the following error: "Cannot load C:/Program Files/Apache
| > Group/Apache2/modules/mod_python.so into server: The specified module
|
| While I'm not using Apache or mod_python, I would be willing to bet that
| your error is the result of using 'mod_python.so' in Windows.  Try
| 'mod_python.dll' instead.
|
|   - Josiah




From tmartinez at ammsoft.com  Tue Jan 27 05:04:15 2004
From: tmartinez at ammsoft.com (Ya)
Date: Tue, 27 Jan 2004 11:04:15 +0100
Subject: wxpython and wxlocale
References: <bv3ur6$bm1$1@news.ya.com> <bv403p$3ot$1@atlantis.news.tpi.pl>
Message-ID: <bv5d94$52a$1@news.ya.com>

This is my code:
The button of "OK" is not translated.
What is wrong ?

#I have a mo file named myapp.mo for translate my own dialogs.
#its containt
#....
#....
#: myapp.py:23
#msgid "Hello World"
#msgstr "Bonjour Monde"
#...
#in this location .\locale\fr\LC_MESSAGES

import gettext
from wxPython.wx import *
import wx
import locale
import sys, os, time

def startapp(self):

    self.loc = wx.Locale()
    self.loc.Init(wx.LANGUAGE_FRENCH)

    gettext.translation("myapp", ".\locale",languages=['fr']).install()

    #display then message "Bonjour Monde", but the OK button not is
translate!!!!!
    dlg = wxMessageDialog(None, _('Hello World'),'', wxOK |
wxICON_INFORMATION)
    try:
        dlg.ShowModal()
    finally:
        dlg.Destroy()

class BoaApp(wxApp):
    def OnInit(self):
        wxInitAllImageHandlers()
        startapp(self)
        return True

def main():
    try:
        demopath= os.path.dirname(__file__)
        os.chdir(demopath)
    except:
        pass
    application = BoaApp(0)
    application.MainLoop()

if __name__ == '__main__':
    main()

"Jarek Zgoda" <jzgoda at gazeta.usun.pl> escribi? en el mensaje
news:bv403p$3ot$1 at atlantis.news.tpi.pl...
> Ya <tmartinez at ammsoft.com> pisze:
>
> > Is there any way of telling python that the text of the dialogues is in
a
> > specific language?
> > And in affirmative case. How is it made? since all the attempts have
been
> > useless.
> > I think that wxLocale has to be used, but I do not become clear.
>
> loc = wx.Locale()
> loc.Init(wx.LANGUAGE_POLISH)
>
> Et voila, your program uses Polish dialogs.
>
> --
> Jarek Zgoda
> Unregistered Linux User #-1
> http://www.zgoda.biz/ JID:zgoda-a-chrome.pl http://zgoda.jogger.pl/




From mwh at python.net  Mon Jan 19 06:23:10 2004
From: mwh at python.net (Michael Hudson)
Date: Mon, 19 Jan 2004 11:23:10 GMT
Subject: parse binary file in python?
References: <Pine.LNX.4.58.0401182201180.1249@leopard.stud.ntnu.no>
	<bueve3$9qv$01$2@news.t-online.com>
	<Pine.LNX.4.58.0401191101480.11544@leopard.stud.ntnu.no>
Message-ID: <m3hdys6v36.fsf@pc150.maths.bris.ac.uk>

Andreas R?sdal <andrearo at stud.ntnu.no> writes:

> On Sun, 18 Jan 2004, "Martin v. L?wis" wrote:
> > Andreas R?sdal wrote:
> > > I want to parse a binary file in python. Does
> > > python have some built in methods for doing this easily?
> > > Any links to example code would be nice..
> >
> > Depends on the kind of parsing you want to do. Python
> > can naturally represent binary files in string objects,
> > e.g.
> >
> > f = open("binaryfile.bin", "rb") # notice the b for binary mode
> > data = f.read()
> > f.close()
> >
> > You can then look at the individual bytes by index.
> 
> Thanks. Just wanting to know if I understood your answer correctly;
> will the data variable above be an array of binary data,
> eg. data[220] == 0, and data[221] == 1 etc?

No, it's a string, but you can get what you want by using the `ord'
builtin function or the array module or the struct module (or probably
various other ways).

Cheers,
mwh

-- 
  To summarise the summary of the summary:- people are a problem.
                   -- The Hitch-Hikers Guide to the Galaxy, Episode 12


From aahz at pythoncraft.com  Sat Jan  3 22:47:51 2004
From: aahz at pythoncraft.com (Aahz)
Date: 3 Jan 2004 22:47:51 -0500
Subject: Creating a capabilities-based restricted execution system
References: <LmmdnUn4seDeGWuiXTWc-w@speakeasy.net>
	<vveg0bb6is2f60@news.supernews.com> <bt7lbp$ovg$1@panix2.panix.com>
	<vveohcpod4oje0@news.supernews.com>
Message-ID: <bt82d7$ort$1@panix3.panix.com>

In article <vveohcpod4oje0 at news.supernews.com>,
John Roth <newsgroups at jhrothjr.com> wrote:
>"Aahz" <aahz at pythoncraft.com> wrote in message
>news:bt7lbp$ovg$1 at panix2.panix.com...
>> In article <vveg0bb6is2f60 at news.supernews.com>,
>> John Roth <newsgroups at jhrothjr.com> wrote:
>>>
>>>Restricted Python was withdrawn because of a number of holes, of which
>>>new style classes were the last straw.
>>
>> RestrictedPython was *not* withdrawn; rexec was withdrawn.  This is a
>> difficult enough issue to discuss without confusing different modules.  See
>> http://dev.zope.org/Wikis/DevSite/Projects/SupportPython21/RestrictedPython
>
>I'm not sure what you're trying to say. The Zope page you reference
>says that they were (prior to 2.1) doing things like modifying generated
>byte code and reworking the AST. That's fun stuff I'm sure, but it
>doesn't have anything to do with "Restricted Execution" as defined in the
>Python Library Reference, Chapter 17, which covers Restricted Execution,
>RExec and Bastion (which was also withdrawn.)
>
>If I confused you with a subtle nomenclature difference, sorry. I don't
>care what Zope is doing or not doing, except for the fact that it seems
>to come up in this discussion. I'm only concerned with what Python is
>(or is not) doing. The approach in the Wiki page you pointed to does,
>however, seem to be a substantially more bullet-proof approach than
>Python's Restricted Execution.

Well, I don't care what you do or don't care about, but I do care that
if you're going to post in a thread that you actually read what you're
responding to and that you post accurate information.  If you go back to
the post that started this thread, it's quite clear that the reference
was specifically to Zope's RestrictedPython.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

Weinberg's Second Law: If builders built buildings the way programmers wrote 
programs, then the first woodpecker that came along would destroy civilization.


From max at alcyone.com  Tue Jan 13 17:49:49 2004
From: max at alcyone.com (Erik Max Francis)
Date: Tue, 13 Jan 2004 14:49:49 -0800
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
	<K_YMb.10994$9k7.204413@news.xtra.co.nz>
	<bu1qq3$cu440$1@ID-207230.news.uni-berlin.de>
Message-ID: <4004760D.2607A0@alcyone.com>

"Brandon J. Van Every" wrote:

> I'll denigrate them all I want.  With rare exceptions, they aren't a
> value
> add to what I want to get done.  There's this huge cultural divide
> between
> hobbyists and commercialists.

Right, they're all hobbyists and you're a commercialist.  What's your
professional experience, again?

-- 
 __ Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
/  \ San Jose, CA, USA && 37 20 N 121 53 W && &tSftDotIotE
\__/ All I know is / I need you in my life
    -- India Arie


From usenet_spam at janc.invalid  Fri Jan  9 15:39:07 2004
From: usenet_spam at janc.invalid (JanC)
Date: Fri, 09 Jan 2004 20:39:07 GMT
Subject: Looking for help with regular expressions- not Python Specific
References: <8d3e714e.0401072114.5bf3fba7@posting.google.com>
	<yQ6Lb.5045351$Of.796611@news.easynews.com>
Message-ID: <Xns946BDC41631C4JanC@213.119.4.35>

Joe Francia <usenet at -OBFUSCATED-joefrancia.com> schreef:

> You also may want to check out 
> Kodos for interactively testing & debugging regexes - 
> http://kodos.sourceforge.net

An alternative to Kodos is Kiki:
<http://project5.freezope.org/kiki/>
(uses wxPython while Kodos uses pyQT)

-- 
JanC

"Be strict when sending and tolerant when receiving."
RFC 1958 - Architectural Principles of the Internet - section 3.9


From wweston at att.net  Sat Jan 24 12:09:21 2004
From: wweston at att.net (wes weston)
Date: Sat, 24 Jan 2004 17:09:21 GMT
Subject: Various strings to dates.
In-Reply-To: <4GfQb.16187$AA6.14368@fed1read03>
References: <4GfQb.16187$AA6.14368@fed1read03>
Message-ID: <5FxQb.100853$6y6.2012117@bgtnsc05-news.ops.worldnet.att.net>

#!/usr/local/bin/python -O

#NOTE: add missing MONTHS; DAYS not used

import datetime
import string

dateList = ["Fri, 23 Jan 2004 00:06:15",
             "Thursday, 22 January 2004 03:15:06",
             "Thursday, January 22, 2004, 03:15:06",
             "2004, Thursday, 22 January 03:15:06"]
MONTHS = [("JANUARY",1),
           ("JAN",1),
           ("FEBRUARY",2),
           ("FEB",2),
           #etc
           ]
DAYS  = [("Monday",0),
          ("Mon",0),
          #........
          ("Thursday",3),
          ("Thur",3)
         ]
#--------------------------------------------------------------------
def GetMonthInt(mstr):
     #print "mstr=",mstr
     for t in MONTHS:
         if t[0].find(mstr) > -1:
             return t[1]
     return -1
#--------------------------------------------------------------------
class MyDateTime:
     def __init__(self,oddstr):
         tokens = oddstr.split()
         temp   = []
         for t in tokens:
             if t.find(":") > -1:
                 continue
             if t[-1] == ',':
                 t = t[:-1]
             temp.append(t)
         tokens = temp
         #for t in tokens:
         #    print t
         year  = -1
         month = -1
         day   = -1
         for t in tokens:
             if t[0] in string.digits:
                 x = int(t)
                 if x > 31:
                     year = x
                 else:
                     day  = x
                 continue
             t = t.upper()
             if t[0] in string.ascii_uppercase:
                 x = GetMonthInt(t)
                 if x <> -1:
                     month = x
                     continue
         if year > -1 and month > -1 and day > -1:
             self.Date = datetime.date(year,month,day)
         else:
             self.Date = None
     def Show(self):
         print self.Date.ctime()

#--------------------------------------------------------------------
if __name__ == '__main__':
     for date in dateList:
         dt = MyDateTime(date)
         dt.Show()



From max at alcyone.com  Thu Jan 22 21:06:25 2004
From: max at alcyone.com (Erik Max Francis)
Date: Thu, 22 Jan 2004 18:06:25 -0800
Subject: I support PEP 326
References: <mailman.654.1074788734.12720.python-list@python.org>
Message-ID: <401081A1.E4C34F00@alcyone.com>

Gary Robinson wrote:

> I've recently had a couple of cases of needing exactly what it
> proposes, and
> having to kluge around the fact that it's not there. It's a great
> idea.
> 
> If there anywhere else I should be expressing my opinion on this, let
> me
> know.

Seems quite reasonable to me.  The only issue I'd take with it is the
choice of Min and Max for the names of the singletons; they're a little
too close to the functions min and max, which obviously they're both
likely to be used with.  I would suggest something a little more verbose
such as Minimum and Maximum, or if you want to get silly, Infimum and
Supremum.

-- 
 __ Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
/  \ San Jose, CA, USA && 37 20 N 121 53 W && &tSftDotIotE
\__/ Love is the most subtle form of self-interest.
    -- Holbrook Jackson


From somebody at nowhere.com  Sat Jan 10 17:58:23 2004
From: somebody at nowhere.com (Sean Richards)
Date: Sun, 11 Jan 2004 11:58:23 +1300
Subject: Emacs python mode question
References: <pan.2004.01.10.21.08.16.172000@hotmail.com>
	<mailman.274.1073771373.12720.python-list@python.org>
	<pan.2004.01.10.22.04.08.125000@hotmail.com>
Message-ID: <87zncvwgvk.fsf@hugin.valhalla.net>

jblazi <jblazi at hotmail.com> writes:

> gogo-line is on the menu but is not bound to a key. How can I bind it?

Put (global-set-key (kbd "M-g") 'goto-line) in your ~/.emacs 

Sean

-- 
"Hver sin smak", sa vintapperen, han drakk mens de andre sloss.


From a.schmolck at gmx.net  Fri Jan  9 12:41:29 2004
From: a.schmolck at gmx.net (Alexander Schmolck)
Date: 09 Jan 2004 17:41:29 +0000
Subject: how to speedup this code?
References: <btmgtp$grr$1@chessie.cirr.com>
Message-ID: <yfseku9uiie.fsf@black132.ex.ac.uk>

Ognen Duzlevski <maketo at gronland.freeshell.org> writes:

> Hi all,
> 
> I have rewritten a C program to solve a bioinformatics problem. Portion where most of the time is spent is:
> 
> def DynAlign(scoremat,insertmat,delmat,tseq,qseq,tlen,qlen):
>     global ONEINDELPENALTY,OPENGAPPENALTY
> 
>     for ndx1 in range(1,tlen+1):
>         for ndx2 in range(1,qlen+1):
>             delmat[ndx1][ndx2] = Min(delmat  [ndx1-1][ndx2]+ONEINDELPENALTY, \
>                                  Min(scoremat[ndx1-1][ndx2]+OPENGAPPENALTY+ONEINDELPENALTY, \
>                                     insertmat[ndx1-1][ndx2]+OPENGAPPENALTY+ONEINDELPENALTY))
>             insertmat[ndx1][ndx2] = Min(insertmat[ndx1][ndx2-1]+ONEINDELPENALTY, \
>                             Min(scoremat[ndx1][ndx2-1]+OPENGAPPENALTY+ONEINDELPENALTY, \
>                             delmat[ndx1][ndx2-1]+OPENGAPPENALTY+ONEINDELPENALTY))
>             scoremat[ndx1][ndx2] = Min(scoremat[ndx1-1][ndx2-1], \
>                             Min(delmat[ndx1-1][ndx2-1], insertmat[ndx1-1][ndx2-1])) + \
>                             GetFitnessScore(tseq,ndx1-1,qseq,ndx2-1)

You're obviously quite new to python and Numeric (also have a look at
numarray, BTW, which is meant to replace Numeric in the not so far future), so
you're still thinking in terms of C.

In python+Numeric you can often replace C-style for loops with a much more
concise and elegant array manipulation (which will be very efficient, unlike
for loops in python -- unless you are using psyco, that is).

I think you're particular example will fit into this pattern (warning: the
code below is just toget you started -- it might be quite wrong, I haven't
looked too carefullly at your code and just jotted this down quickly):

    from Numeric import minimum, array, ...
    delmat = array(
    [...]
    def ...

        # formatted a bit funny for better visual clarity
        delmat[1:tlen+1,1:qlen+1] = \
            minimum(   delmat[1:tlen,1:qlen+1]+ ONEINDELPENALTY,
            minimum( scoremat[1:tlen,1:qlen+1]+ OPENGAPPENALTY, 
                    insertmat[1:tlen,1:qlen+1]+ OPENGAPPENALTY + ONEINDELPENALTY))
        [etc.]

Be sure you understand the indexing (NB. array[a][b] vs. array[a,b]), the
Numeric manual is quite good, so have a look at it (reading some code in scipy
or some other project that uses Numeric might also be a good way to speed up
the learning process).


HTH

'as

p.s. Let me also recommend that you don't emulate the C style
compile-run-debug-edit approach in python -- I think you'll find that a
test-driven development + an interactive shell to try things out (have a look
at ipython, BTW) make for much more pleasant scientific computing.


From mwh at python.net  Wed Jan  7 07:28:32 2004
From: mwh at python.net (Michael Hudson)
Date: Wed, 7 Jan 2004 12:28:32 GMT
Subject: KeyboardInterrupt and threading
References: <a6562e06.0401021352.65aac82b@posting.google.com>
	<m3fzeu73k3.fsf@pc150.maths.bris.ac.uk>
	<a6562e06.0401061844.3269da85@posting.google.com>
Message-ID: <m3k7442b9r.fsf@pc150.maths.bris.ac.uk>

q2n8byu02 at sneakemail.com (Ivan Nestlerode) writes:

> Michael Hudson <mwh at python.net> wrote in message news:<m3fzeu73k3.fsf at pc150.maths.bris.ac.uk>...
> > On debian, the signal module certainly should be available, and the
> > KeyboardInterrupt exception should go to the main thread.  Or at
> > least, that's what I thought.  You're definitely seeing it being
> > delivered to an arbitrary thread?
> > 
> > Cheers,
> > mwh
> 
> After a closer look, I am not seeing KeyboardInterrupt being delivered
> to non-main threads. What I am seeing is that Ctrl-C does not work at
> all when non-main threads are CPU intensive. 

Oh...

> I had previously jumped to the conclusion that because Ctrl-C didn't
> work and because the non-main thread was sloppy ("except:"), that
> Ctrl-C wasn't working because KeyboardInterrupt was going to the
> sub-thread. That was an incorrect conclusion.

Well, in a way, good, but perhaps not for you...

> So I guess the entire problem can be restated as: How do I make
> Ctrl-C work properly when the non-main thread is busier than the
> main thread?

This is hard for me to answer -- it works fine for me.  What platform
are you on?  ISTR Debian, but not versions of anything.

I'm somewhat inclined to start blaming libc at this point...

As you may well be aware, the combination of threads and signals is a
bit of a minefield.  Python runs all threads other than the main
thread with all signals masked. My understanding is that when a signal
is delivered to a process it's delivered to an arbitrary thread that
has that signal unmasked -- in Python's case, this should be the main
thread.  It kind of sounds like in your case the signal is being
queued up on a non-main thread, but as the signal is never unblocked,
it never gets handled.

[...]
> I think this is a bug though (I shouldn't have to put hacks into the
> main thread to get this to work).

Agreed, but I'm not sure they're in Python.

> Any thoughts?

Upgrade glibc?

Cheers,
mwh

-- 
     ARTHUR:  Why are there three of you?
  LINTILLAS:  Why is there only one of you?
     ARTHUR:  Er... Could I have notice of that question?
                   -- The Hitch-Hikers Guide to the Galaxy, Episode 11


From computer.problemen at skynet.be  Sat Jan 10 13:27:35 2004
From: computer.problemen at skynet.be (broebel)
Date: Sat, 10 Jan 2004 19:27:35 +0100
Subject: solving a small programm
Message-ID: <40004254$0$16669$ba620e4c@news.skynet.be>

hey,

for the real programmers amongst you, this may be really annoying but I've
been learning the language for only two days.

this is my problem,
in this programm,which already works I now have to make a total count of how
many coins are used.
this program gives the total per coin. It should be a small peace of code
(as explained in a tutorial i read, without the answer.)that counts the
total of all the coins.
I ve been searching for two days and for this kind of programm it really
seems kind of long.

thanks in advance

# Een bedrag gepast betalen met zo min mogelijk euromunten

bedrag = input ( 'Geef bedrag tussen 0 en 500 eurocent: ' )

for munt in 200, 100, 50, 20, 10, 5, 2, 1 :
    aantal = 0

    while bedrag >= munt :
        aantal = aantal + 1
        bedrag = bedrag - munt

    if aantal > 0 :
        print aantal, 'x', munt

what i need is:
for example
the programm gives
68= 50*1
       10*1
       5*1
       2*1
       1*1
I need an additional code to get the "5" total of all the coins together.






From joe.nguyen at coair.com  Thu Jan  8 18:15:04 2004
From: joe.nguyen at coair.com (JuiceMan)
Date: 8 Jan 2004 15:15:04 -0800
Subject: Python and SOAP
Message-ID: <67ce7525.0401081515.cdde341@posting.google.com>

Hi, i've been trying to access the my company's SOAP webservice with
no luck.
I'm using the httplib library.

This is my code:



from httplib import HTTP
from urllib import quote

# Establish SOAP data

SOAPdata = '<?xml version="1.0" encoding="utf-8"?>'
SOAPdata = '<soap:Envelope
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:xsd="http://www.w3.org/2001/XMLSchema"
xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">'
SOAPdata = SOAPdata + '\n  <soap:Body>'
SOAPdata = SOAPdata + '\n    <checkPassword
xmlns="COM.COAIR.WWW.Technology.CoWebServices.COWSEmployeeServiceCenter">'
SOAPdata = SOAPdata + '\n      <employeeID>XXXXXX</employeeID>'
SOAPdata = SOAPdata + '\n      <password>XXXXXX</password>'
SOAPdata = SOAPdata + '\n      <accessCode>XXXXX</accessCode>'
SOAPdata = SOAPdata + '\n    </checkPassword>'
SOAPdata = SOAPdata + '\n  </soap:Body>'
SOAPdata = SOAPdata + '\n</soap:Envelope>'

postdata = quote(SOAPdata)


print "\n************************* OUTGOING SOAP
************************************"
print postdata

# Begin HTTP request
req = HTTP("insidecoair5")
req.putrequest("POST",
"/cowsemployeeservicecenter/cowsemployeeservicecenter.asmx")
req.putheader("Accept", "text/xml; charset=utf-8")
req.putheader("Content-Type", "text/xml; charset=utf-8")
req.putheader("Content-Legth", str(len(postdata)))
req.putheader("SOAPAction",
"COM.COAIR.WWW.Technology.CoWebServices.COWSEmployeeServiceCenter/checkPassword")

req.endheaders()

# Send SOAP body
req.send(postdata)


ec, em, h = req.getreply()
print "\n*************************** HTTP RESPONSE
**********************************"
print ec, em

print "\n*************************** HTTP HEADER RESPONSE
***************************"
print h

# get file-like object from HTTP response
# and print received HTML to screen
fd = req.getfile()
textlines = fd.read()
fd.close()

print "\n************************** INCOMING SOAP
***********************************"
print textlines


I get back a faultstring with a "THe root element is missing" error

I cant seem to see what im doing wrong.  Any help would be greatly
appreciated.


From mailund at birc.dk  Thu Jan 15 09:59:39 2004
From: mailund at birc.dk (Thomas Mailund)
Date: Thu, 15 Jan 2004 15:59:39 +0100
Subject: Cyclic garbage collection and segfaults...
References: <pan.2004.01.14.20.21.41.430958@birc.dk>
	<m3brp5wjh5.fsf@pc150.maths.bris.ac.uk>
Message-ID: <pan.2004.01.15.14.59.39.59238@birc.dk>

On Thu, 15 Jan 2004 11:15:51 +0000, Michael Hudson wrote:

> "Thomas Mailund" <mailund at birc.dk> writes:
> 
>> Hi group.
>> 
>> I have a problem with some C extensions I am working with and
>> hope that some of you can help.  
> 
> [snippety]
> 
>> static void
>> Simple_dealloc(SimpleObject *self)
>> {
>>     fprintf(stderr,"Simple_dealloc %p\n", self);
>>     self->ob_type->tp_free((PyObject*)self); /* <= segfault here */
> 
> Well, you're calling tp_free from a tp_dealloc.  That doesn't *sound*
> sensible to me.

I'm suprised to hear that; the documentation I was working from,
<URL:http://www.python.org/doc/current/ext/node22.html>, does exactly
that.  Of course, this is from the section that uses reference counting,
not cyclic gc, but later on, when the garbage collector is introduced, the
deallocator still calls tp_free, it just calls clear first
<URL:http://www.python.org/doc/current/ext/node24.html>.

If I shouldn't free self in this way, how should I do it?

>> Can anyone explain what I'm doing wrong?  Or perhaps suggest a better
>> solution to my "real" problem, if I'm approaching the problem completely
>> wrong :-)
> 
> There are docs on this sort of thing.

About the garbage collection?  In that case, I thought I *was* following
the documentation ;-)

If about the general problem with accessing the whole and parts of a C
structure from python, if you have any specific references in mind, I
would be very grateful if you would post them.  I know that I am not the
first to have this problem, and that very likely there are general
patterns for solving the problem, but my googling didn't find anything
(which probably means I wasn't asking the right questions, but never the
less...)

Yours,
	/mailund



From sidharthk at hotmail.com  Thu Jan 29 13:18:27 2004
From: sidharthk at hotmail.com (Sidharth Kuruvila)
Date: Thu, 29 Jan 2004 23:48:27 +0530
Subject: conditional expression sought
References: <pRbSb.330334$ts4.37644@pd7tw3no>
Message-ID: <bvbj2g$qs70n$1@ID-223265.news.uni-berlin.de>

since True and False
can also evaluate as 1 and 0
you can use the binary operators
| and &
for or and and respectively

>>> class F:
...  a = 5
...  def b(self):
...   self.a = 4
...   return True
...  def a(self):
...   self.a = 1
...   return False
...
>>> g = F()
>>> g.a() & g.b()
False
>>> g.a
4
"Elaine Jackson" <elainejackson7355 at home.com> wrote in message
news:pRbSb.330334$ts4.37644 at pd7tw3no...
> If bool(B_i)==True for 1<=i<=n and j is the smallest i with
bool(A_j)==True,
> then the evaluation of (A_1 and B_1) or ... or (A_n and B_n) returns B_j
without
> evaluating any other B_i. This is such a useful mode of expression that I
would
> like to be able to use something similar even when there is an i with
> bool(B_i)==False. The only thing I can think of by myself is ( (A_1 and
[B_1])
> or ... or (A_n and [B_n]) )[0], and I can't be satisfied with that for
obvious
> reasons. Does anybody know a good way to express this? Any help will be
mucho
> appreciado.
>
> Peace
>
>




From newsgroups at jhrothjr.com  Wed Jan 28 10:18:22 2004
From: newsgroups at jhrothjr.com (John Roth)
Date: Wed, 28 Jan 2004 10:18:22 -0500
Subject: Tcl style traces
References: <40171be5$0$1742$5a62ac22@freenews.iinet.net.au>
	<mailman.890.1075270902.12720.python-list@python.org>
	<40177f07$0$1730$5a62ac22@freenews.iinet.net.au>
Message-ID: <101fkp3nd3ea84c@news.supernews.com>


"Derek Fountain" <nomail at hursley.ibm.com> wrote in message
news:40177f07$0$1730$5a62ac22 at freenews.iinet.net.au...
> > What do you need this for?  If you can be more specific, we might be
able
> > to help you a little better.
>
> I have a Tcl/Tk script which uses a canvas to graphically represent the
data
> stored in the program. Whenever the data store is updated, a Tcl trace
> automatically triggers to ensure the graphical display is kept consistent
> with the data. I was after a simple way to convert the script to Python
> Tkinter. Without the eqivalent of Tcl traces I'm probably going to have to
> think about it... ;o)

There's a facility where you can associate a widget with a
variable so that when the variable changes the widget's
value changes, and vice versa. I don't offhand remember the
details though. You'll need to look at one of the references.
The variable has to be a subclass of a special Tkinter class
for this to work, though.

John Roth




From exarkun at intarweb.us  Sun Jan 18 14:58:49 2004
From: exarkun at intarweb.us (Jp Calderone)
Date: Sun, 18 Jan 2004 14:58:49 -0500
Subject: circular dependency between class and its metaclass
In-Reply-To: <400AE6A4.4090409@sympatico.ca>
References: <400AE6A4.4090409@sympatico.ca>
Message-ID: <20040118195849.GA512@intarweb.us>

On Sun, Jan 18, 2004 at 03:03:48PM -0500, Stefan Seefeld wrote:
> hi there,
> 
> I'v run into a little problem for which I only found an ugly workaround,
> so I'd like to know whether people are aware of better ways to achieve 
> this...
> 
> I'm defining a class 'Class' for which I want to set up a __metaclass__ 
> 'Type'
> which does some work on class variables. In particular, it should apply
> a function on all base classes that are themself derived from 'Class'.
> 
> My first try was:
> 
> ====
> 
> class Class(object):
> 
>     class Type(type):
> 
>         def __init__(cls, name, bases, dict):
> 
>             hierarchy = list(filter(lambda i:issubclass(i, Class), bases))

    hierarchy = [i for i in bases if isinstance(i, Type)]

>             # do something with the hierarchy here
> 
>     __metaclass__ = Type
> 
> ====
> 
> However, this fails because at the point where I want to create the
> 'hierarchy' variable 'Class' isn't known yet. (At what point is it actually
> injected into the local dict ?)
> 

  It is added after the class object is created, which is more or less after
the dedent token at the end of the class definition.  So, for:

    class Foo:          # A
        pass            # B
    x = Foo()           # C

  `Foo' is bound between lines B and C.


> Then I tried to define 'Type' after 'Class' (instead of inside it):
> 
> ====
> 
> class Class(object): pass #supress details for clarity
> 
> class Type(type):
>     ...
> 
> Class.__metaclass__ = Type
> 
> ====
> 
> But this didn't work at all (even though I don't quite understand why).

  The __metaclass__ variable must be set before the class is defined,
because it is used to determine how the class object will actually be
created.  Once the class object has already been created, the __metaclass__
variable is meaningless.

> [snip last case - workaround]

  Jp



From dwelch91.nospam at comcast.net  Fri Jan  2 21:53:21 2004
From: dwelch91.nospam at comcast.net (djw)
Date: Sat, 03 Jan 2004 02:53:21 GMT
Subject: mysql python Newbie Question
In-Reply-To: <vvc80lb8mstue1@corp.supernews.com>
References: <vvc80lb8mstue1@corp.supernews.com>
Message-ID: <B8qJb.104848$VB2.265651@attbi_s51>

Andrew wrote:
> Hi I would like to create a program that accesses mysql from a gui on my
> local computer "mysql is on a server"
> 
> but I am fairly new to python and programming GUI's in general
> 
> What I would like this program to do is be able to access my server and
> change update add and delete records from my databases without having to
> write sql.
> 
> I can create the GUI fairly easily but I do not know how I or what functions
> and modules would be needed to do this or how to write them "Forgive me if I
> sound to Newb"
> 
> If someone out there could help me out maybe offer advice or even better
> some code to build on that would be cool
> 
> Thanks in advance
> 
> Cheers
> 
> Andrew
> 
> 
Quick google search of "python mysql" yields:

http://sourceforge.net/projects/mysql-python

Google of "python mysql example" yields:

http://www.devshed.com/Server_Side/Python/PythonMySQL/print_html


Moral: Google is your friend.

-D



From francisgavila at yahoo.com  Wed Jan 14 04:10:30 2004
From: francisgavila at yahoo.com (Francis Avila)
Date: Wed, 14 Jan 2004 04:10:30 -0500
Subject: Inserting while itterating
References: <pan.2004.01.14.08.43.00.894047@thomas-guettler.de>
Message-ID: <100a1uco9n3l21b@corp.supernews.com>


Thomas Guettler wrote in message ...
>Hi,
>
>Simple excerise:
>
>You have a sorted list of integers:
>l=[1, 2, 4, 7, 8, 12]
>
>and you should fill all gaps:
>
>result == [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]
>
>How would you code this?
>
>Constrain: The original list should be changed,
>don't create a copy.
>
>  thomas
>
This a homework problem?

>>> L = [1, 2, 4, 7, 8, 12]
>>> result = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]
>>> L.extend([i for i in range(L[0], L[-1]) if i not in L])
>>> L.sort()
>>> L == result
True

-- 
Francis Avila


From irmen at -NOSPAM-REMOVETHIS-xs4all.nl  Sat Jan  3 13:33:21 2004
From: irmen at -NOSPAM-REMOVETHIS-xs4all.nl (Irmen de Jong)
Date: Sat, 03 Jan 2004 19:33:21 +0100
Subject: Import problems
In-Reply-To: <Xns9465B0F3E7B6Bt45fs6vve@130.133.1.4>
References: <Xns9465B0F3E7B6Bt45fs6vve@130.133.1.4>
Message-ID: <3ff70aef$0$327$e4fe514c@news.xs4all.nl>

Psymaster wrote:

> I'm working on projects using pygame and I encounter the following 
> problem: In (almost) every file of my source I have to "include 
> pygame" because every file uses some function from pygame. Is there 
> another way to do this? Does it provide overhead to my app?

There is no overhead. Modules get imported only once.
Any  additional imports just return the same module directly.

But there should be another way to do this; if all your files
depend on pygame, I think the modularization / structure of your
program is suboptimal. I think there should only be a few
modules that do stuff related to pygame, the rest should import
those instead of doing things via pygame themselves.

--Irmen



From peter at engcorp.com  Tue Jan 13 14:34:02 2004
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 13 Jan 2004 14:34:02 -0500
Subject: error at "import anydbm"
References: <40042edd$0$24038$626a54ce@news.free.fr>
Message-ID: <4004482A.A66C2886@engcorp.com>

"C?dric V." wrote:
> I am unable to import anydbm without error under Python2.2 or 2.3 (Linux).
> 
> this script:
>  >#!/usr/bin/env python
>  >import anydbm
>  >
>  >if __name__ == "__main__":
>  >    db = anydbm.open("test", "rwc")
>  >    db["test"] = "ok"
> 
> returns at execution:
> 
>  >cedric at dev _test $ python dbm.py
>  >Traceback (most recent call last):
>  >  File "dbm.py", line 2, in ?
>  >    import anydbm
>  >  File "/usr/lib/python2.3/anydbm.py", line 59, in ?
>  >    _errors.append(_mod.error)
>  >AttributeError: 'module' object has no attribute 'error'

Do you have any modules of your own creation called any of the following?

  ['dbhash', 'gdbm', 'dbm', 'dumbdbm']

These are the names of the modules anydbm tries to import, and it appears
to expect each of them to have an "error" name defined.  Most likely your
module, with a conflicting name, is being found first and it does not
have an "error" attribute.

Generally speaking, you should try to avoid using the same names as
the standard library modules for your own code.

-Peter


From jeremy at zope.com  Mon Jan 12 11:49:58 2004
From: jeremy at zope.com (Jeremy Hylton)
Date: Mon, 12 Jan 2004 11:49:58 -0500
Subject: Databases: Which one's right for me?
In-Reply-To: <9a6d7d9d.0401111712.22a74be7@posting.google.com>
References: <mailman.284.1073847641.12720.python-list@python.org>
	<9a6d7d9d.0401111712.22a74be7@posting.google.com>
Message-ID: <1073926198.6341.424.camel@localhost.localdomain>

On Sun, 2004-01-11 at 20:12, Aaron Watters wrote:
> > "The standard" ones aren't all that standard.  ANSI SQL-92 defines multiple
> > isolation levels, and they've been (I think) fairly critiqued as  incomplete
> > and partly ambiguous; e.g.,
> > 
> >     A Critique of ANSI SQL Isolation Levels
> >     Hal Berenson, et al.
> >     http://citeseer.nj.nec.com/berenson95critique.html
> 
> Some SQL isolation levels are hacks to allow long running transactions,
> etcetera.  If you keep to the strictest isolation level you get the
> classical behaviour which has been studied and elaborated by many very
> smart people over the last several decades and which is very well
> understood.

I think lower isolation levels are more than hacks for long-running
transactions.  They seem like they're pretty important for achieving
good performance.  The strictest isolation level is necessary, of
course, for some applications, but not all.

Here's was PostgreSQL has to say about full serializability.
http://www.postgresql.org/docs/current/static/transaction-iso.html

> The Serializable mode provides a rigorous guarantee that each
> transaction sees a wholly consistent view of the database. However,
> the application has to be prepared to retry transactions when
> concurrent updates make it impossible to sustain the illusion of
> serial execution. Since the cost of redoing complex transactions may
> be significant, this mode is recommended only when updating
> transactions contain logic sufficiently complex that they may give
> wrong answers in Read Committed mode. Most commonly, Serializable mode
> is necessary when a transaction executes several successive commands
> that must see identical views of the database.

Jeremy





From michael at foord.net  Mon Jan 19 06:50:10 2004
From: michael at foord.net (Fuzzyman)
Date: 19 Jan 2004 03:50:10 -0800
Subject: Setting Window Size using Pack Under Tkinter
References: <8089854e.0401160134.5674a86c@posting.google.com>
	<4007de09$0$151$e4fe514c@dreader5.news.xs4all.nl>
	<4007dedc$0$166$e4fe514c@dreader5.news.xs4all.nl>
Message-ID: <8089854e.0401190350.61b3efc@posting.google.com>

Short of actually trying it...... (when I get home I *will* try it)

Would the following work :

 from Tkinter import *
 gui=Tk()
 Button(gui, text='A button', command=a_function).pack()

  ####code####
 gui.geometry("+%d+%d" %(300, 100))
 gui.resizable(0,0)
 gui.mainloop()

??

If I recall correctly it ought to.... (mixing the pack and geometry
methods in the same GUI)...

Anyway - thanks.

Fuzzy


"duikboot" <arjen.dijkstraNoSpam at hccnet.nl> wrote in message news:<4007dedc$0$166$e4fe514c at dreader5.news.xs4all.nl>...
> from Tkinter import *
>  gui=Tk()
> 
>  ####code####
>  gui.geometry("+%d+%d" %(300, 100))
>  gui.resizable(0,0)
>  gui.mainloop()
> 
> Will work offcourse too.. :-)
> 
> cheers,
> 
> Arjen
> 
> 
> 
> "duikboot" <arjen.dijkstraNoSpam at hccnet.nl> schreef in bericht
> news:4007de09$0$151$e4fe514c at dreader5.news.xs4all.nl...
> > from Tkinter import *
> > gui=Tk()
> >
> > ####code####
> > gui.geometry("+%d+%d" %(300, 100))
> > gui.resizable(0,0)
> >
> > if __name__=='__main__':
> >     gui.mainloop()
> >
> >
> >
> >
> > "Fuzzyman" <michael at foord.net> schreef in bericht
> > news:8089854e.0401160134.5674a86c at posting.google.com...
> > > I'm having trouble implementing my GUI using Tkinter......
> > > I've been working through the Tkinter tutorials from 'Programming
> > > Python' and am generally happy enough with the functionality and feel
> > > of the results *but* - I can't see how to set the size of the root
> > > window (or any top level window) and to stop it being resized........
> > >
> > > Thanks for any help.
> > >
> > > Fuzzyman
> > >
> > >
> > > --
> > >
> > > YAPLP
> > > Yet Another Python Links Page
> > > http://www.voidspace.org.uk/coollinks/python_links.shtml
> > >
> > > Python Utils
> > > http://www.voidspace.org.uk/atlantibots/pythonutils.html
> > >
> > > --
> > >
> > > http://www.Voidspace.org.uk
> > > The Place where headspace meets cyberspace. Online resource site -
> > > covering science, technology, computing, cyberpunk, psychology,
> > > spirituality, fiction and more.
> > >
> > > ---
> > > http://www.atlantibots.org.uk
> > > http://groups.yahoo.com/group/atlantis_talk/
> > > Atlantibots - stomping across the worlds of Atlantis.
> > > ---
> > > http://www.fuchsiashockz.co.uk
> > > http://groups.yahoo.com/group/void-shockz
> > > ---
> > >
> > > Everyone has talent. What is rare is the courage to follow talent
> > > to the dark place where it leads. -Erica Jong
> > > Ambition is a poor excuse for not having sense enough to be lazy.
> > >          -Milan Kundera
> >
> >


From NAIGIMSESRIMAIL at gims.com  Tue Jan 27 07:20:35 2004
From: NAIGIMSESRIMAIL at gims.com (GroupShield for Exchange (ESRIMAIL))
Date: Tue, 27 Jan 2004 14:20:35 +0200
Subject: ALERT -  GroupShield ticket number OA1719_1075206030_ESRIMAIL_3 w
	as generated
Message-ID: <B06B8FEF47ACD7119E720040F428459101F64FF4@ESRIMAIL>

Action Taken:
The attachment was quarantined from the message and replaced with a text
file informing the recipient of the action taken.

To:
python-list at python.org <python-list at python.org>

From:
ciwwy at aol.com <ciwwy at aol.com>

Sent:
-1211817472,29615281

Subject:
Error

Attachment Details:-

Attachment Name: MailMonitor_report.txt
File: MailMonitor_report.txt
Infected? No
Repaired? No
Blocked? Yes
Deleted? No
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From newsgroups at jhrothjr.com  Sat Jan  3 12:39:42 2004
From: newsgroups at jhrothjr.com (John Roth)
Date: Sat, 3 Jan 2004 12:39:42 -0500
Subject: Text-to-HTML processing program
References: <slrnbvcm32.122.philh@cabalamat.cabalamat.org>
Message-ID: <vvdvk8ggobfn58@news.supernews.com>


"phil hunt" <philh at invalid.email.address> wrote in message
news:slrnbvcm32.122.philh at cabalamat.cabalamat.org...
> Does anyone know of a text-to-HTML processing program, ideally
> written in Python because I'll probably be wanting to make small
> modifications to it, which is simple and straightforward to use
> and which uses a simple markup language (something like Wikipedia
> markup would be ideal)?

There's an old saying that's attributed to a lot of people:

For every hard problem, there is a solution that is simple,
obvious and wrong.

Markup seems to be one of those problems. Lots of people
look at the existing markup languages out there, go "oh, yuck!,"
and invent a simpler markup language that promptly starts growing
until it reaches the state of the languages they originally rejected
as too complex.

John Roth





From JimJJewett at yahoo.com  Mon Jan 19 16:58:05 2004
From: JimJJewett at yahoo.com (Jim Jewett)
Date: 19 Jan 2004 13:58:05 -0800
Subject: __init__(self, *args, **kwargs) - why not always?
Message-ID: <cab22418.0401191358.297a0415@posting.google.com>

Normally, I expect a subclass to act in a manner consistent 
with its Base classes.  In particular, I don't expect to 
*lose* any functionality, unless that was the whole point of 
the subclass.  (e.g., a security-restricted version, or an
interface implementation that doesn't require a filesystem.)

One (common?) exception seems to occur in initialization.  I 
understand stripping out arguments that your subclass explicitly 
handles or replaces.  A subclass intended to restrict access 
might even "handle" all unknown arguments.  But for the general 
case, is there any reason *not* to pass unhandled initializer 
arguments to the parent classes?

More specifically, is there any reason not to replace:

    class SubClass(BaseClass):
        def __init__(self):
            BaseClass.__init__(self)

with: 

    class SubClass(BaseClass):
        def __init__(self, *args, **kwargs):
            BaseClass.__init__(self, *args, **kwargs)

on a near-global basis?  

--------

Bug 876421 provides an example surprise in the standard library.  

http://sourceforge.net/tracker/?func=detail&atid=105470&aid=876421&group_id=5470

SubClass(level=ERROR) throws an exception, even though
BaseClass(level=ERROR) works, and level=ERROR was still
valid to the subclass, with the same meaning.  

I expect that variations on verbosity will be a common 
pass-through argument in many types of code.

--------

Yes, I realize that changing BaseClass.__init__(...) 
to super.__init__(...) may be better still, but that 
discussion is orthogonal to this question.

Yes, I would have preferred that the interpreter add
the (possibly modified) *args and **kwargs automatically, 
but I do realize that it is too late for that change.

-- 
 -jJ  Take only memories.  Leave not even footprints.


From quentel.pierre at wanadoo.fr  Fri Jan 16 06:40:08 2004
From: quentel.pierre at wanadoo.fr (Pierre Quentel)
Date: Fri, 16 Jan 2004 12:40:08 +0100
Subject: Tkinter: disable menu items while running
References: <bu4jal$f0t$1@news.Stanford.EDU>
Message-ID: <bu8iir$l17$1@news-reader3.wanadoo.fr>

Menu widgets have an index, used to get/set their properties
There must be more elegant solutions, but this should work :

----------------------
from Tkinter import *

root=Tk()

def hello():
    print "hello !"

def toggle():
    if submenu.entrycget(0,"state")=="normal":
        submenu.entryconfig(0,state=DISABLED)
        submenu.entryconfig(1,label="Speak please")
    else:
        submenu.entryconfig(0,state=NORMAL)
        submenu.entryconfig(1,label="Quiet please")

menubar = Menu(root)

submenu=Menu(menubar,tearoff=0)

submenu2=Menu(submenu,tearoff=0)
submenu2.add_command(label="Hello", command=hello)

# this cascade will have index 0 in submenu
submenu.add_cascade(label="Say",menu=submenu2,state=DISABLED)
# these commands will have index 1 and 2
submenu.add_command(label="Speak please",command=toggle)
submenu.add_command(label="Exit", command=root.quit)

menubar.add_cascade(label="Test",menu=submenu)

# display the menu
root.config(menu=menubar)
root.mainloop()
----------------------Hope this helps,
Pierre




From kvisco at exoffice.com  Mon Jan 26 21:01:03 2004
From: kvisco at exoffice.com (kvisco at exoffice.com)
Date: Mon, 26 Jan 2004 21:01:03 -0500
Subject: hello
Message-ID: <200401270200.i0R20eZB027664@smtptpa.interwan.gte.com>

The message contains Unicode characters and has been sent as a binary attachment.


From ptmcg at users.sourceforge.net  Wed Jan 14 02:39:21 2004
From: ptmcg at users.sourceforge.net (Paul McGuire)
Date: Wed, 14 Jan 2004 07:39:21 GMT
Subject: building strings with variable input
References: <pduMb.6321$g4.137247@news2.nokia.com>
	<400273B8.E991F41D@alcyone.com>
	<2szMb.6443$k4.143679@news1.nokia.com>
	<3rr900dm9s7th7kgq4muj76d5ocs5uep3b@4ax.com>
Message-ID: <Jm6Nb.19096$RV5.16295@fe2.texas.rr.com>

"Tim Roberts" <timr at probo.com> wrote in message
news:3rr900dm9s7th7kgq4muj76d5ocs5uep3b at 4ax.com...
> Olaf Meyer <nomail at nospam.net> wrote:
> >
> >I just found out another way ;-) Using the locals() has the disadvantage
> >that I cannot use more complex variable parameters (e.g. certain values
> >of a dictionary). The following works well:
> >
> >cmd = (executable + " -start " + startTime + " -end " + endTime +
> >        " -dir " + options.dir)
>
> Yes, that works, but you should bear in mind that it is slower than the %s
> option.  The "+" operations are all separate interpreter steps, while the
> "%" operation is done in C.
>

On the relative time scales of concatenating 7 strings compared to forking
off a separate process (which I presume is what is to be done with cmd), I'd
go for the more readable representation, to aid in long term
maintainability.

If I have some string concatenation being done in a highly repetitive part
of code, then by all means, replace it with one of the half dozen documented
optimized alternatives.  But if I build a string in order to create a
sub-process, or invoke a database query, or make a remote CORBA invocation,
etc., then these "optimizations" don't really save much time, and instead
distract me/reviewers/testers/maintainers from the important program logic.

-- Paul




From skip at pobox.com  Thu Jan 22 14:15:09 2004
From: skip at pobox.com (Skip Montanaro)
Date: Thu, 22 Jan 2004 13:15:09 -0600
Subject: shelve slow in python 2.3.3 for windows
In-Reply-To: <456v00hma5e5afsmujntins8basrfgotg3@4ax.com>
References: <u1qt00t4nbubknpq2lmeovdk36gu9ekt3r@4ax.com>
	<mailman.614.1074721650.12720.python-list@python.org>
	<322u00ppo44l8g003dgtcu8lna432to411@4ax.com>
	<mailman.623.1074731847.12720.python-list@python.org>
	<456v00hma5e5afsmujntins8basrfgotg3@4ax.com>
Message-ID: <16400.8509.191175.694059@montanaro.dyndns.org>


    Skip> 'dbhash' and 'bsddb185' are really the same beast.

    Marco> Now the question is: is it possible to use bsddb185 with python
    Marco> 2.3.3?

    Skip> You're barking up the wrong tree.  That's not the problem.

    Marco> So you're telling me that dbhash (namely
    Marco> /python2.3/DLLs/_bsddp.pyd) on python 2.3.3 for Windows has a
    Marco> problem?

It would seem so.  See my most recent post to your bug report.  Switching
between bsddb.hashopen and bsddb.btopen seems to make a huge difference.

Skip




From irmen at -NOSPAM-REMOVETHIS-xs4all.nl  Sat Jan  3 07:23:18 2004
From: irmen at -NOSPAM-REMOVETHIS-xs4all.nl (Irmen de Jong)
Date: Sat, 03 Jan 2004 13:23:18 +0100
Subject: Filename type (Was: Re: finding file size)
In-Reply-To: <mailman.45.1073125105.12720.python-list@python.org>
References: <4V4Jb.12709$Vl6.2811218@news20.bellglobal.com>	<bt3l9i$pog$07$3@news.t-online.com>
	<mailman.45.1073125105.12720.python-list@python.org>
Message-ID: <3ff6b436$1$331$e4fe514c@news.xs4all.nl>

Gerrit Holl wrote:

> Any comments?

Are you aware of Jason Orendorff's path module?
(haven't tried it myself though)

See this thread: http://tinyurl.com/3gq8r (google link)

--Irmen




From Pieter.Claerhout at Creo.com  Tue Jan 13 17:30:03 2004
From: Pieter.Claerhout at Creo.com (Pieter Claerhout)
Date: Tue, 13 Jan 2004 23:30:03 +0100
Subject: Oracle to Mysql (dates) Help please
Message-ID: <490316A24CC5D411ACD700B0D078F7F003915D89@cseexch01.cse.creoscitex.com>

My mistake, it should indeed be executemany.

I guess I'm getting to much used to using PDO (pdo.neurokode.com) to do
database stuff...

pieter

Creo
pieter claerhout | product support prinergy | tel: +32 2 352 2511 |
pieter.claerhout at creo.com | www.creo.com

IMAGINE CREATE BELIEVE(tm)


-----Original Message-----
From: Dennis Lee Bieber [mailto:wlfraed at ix.netcom.com] 
Sent: 13 January 2004 18:49
To: python-list at python.org
Subject: Re: Oracle to Mysql (dates) Help please


duikboot fed this fish to the penguins on Tuesday 13 January 2004 01:13 
am:

> 
> 
> Could you please explain that?

        See the reply <mailman.282.1073834719.12720.python-list at python.org> 
(Pieter Claerhout) -- though according to my documents, the method is 
executemany(), not execute_many().


-- 
 > ============================================================== <
 >   wlfraed at ix.netcom.com  | Wulfraed  Dennis Lee Bieber  KD6MOG <
 >      wulfraed at dm.net     |       Bestiaria Support Staff       <
 > ============================================================== <
 >        Bestiaria Home Page: http://www.beastie.dm.net/         <
 >            Home Page: http://www.dm.net/~wulfraed/             <

-- 
http://mail.python.org/mailman/listinfo/python-list



From xah at xahlee.org  Sun Jan 25 00:31:36 2004
From: xah at xahlee.org (Xah Lee)
Date: 24 Jan 2004 21:31:36 -0800
Subject: perl bug File::Basename and Perl's nature
Message-ID: <7fe97cc4.0401242131.22acf485@posting.google.com>

Just bumped into another irresponsibility in perl.

the crime in question this time is the module File::Basename.

Reproduction:

1. create a directory containing a file of this name: "cdrom.html".
2. "use File::Basename;", with the line:
   ($name,$path,$suffix) = fileparse($File::Find::name, ('.html',
'.m'));
3. Notice that your cdrom.html will be parsed into "cdr" with suffix
"om.html".

expletive Perl and Perl slinging morons.

Now, if you peruse the "documentation" of "perldoc File::Basename",
you'll see that it shouldn't be so. AND, the writting as usuall is
fantastic incompetent. To illustrate, i quote:

--begin quote

 fileparse

 The fileparse() routine divides a file
 specification into three parts: a leading path, a
 file name, and a suffix. The path contains
 everything up to and including the last directory
 separator in the input file specification. The
 remainder of the input file specification is then
 divided into name and suffix based on the
 optional patterns you specify in
 @suffixlist. Each element of this list can be a
 qr-quoted pattern (or a string which is
 interpreted as a regular expression), and is
 matched against the end of name. If this
 succeeds, the matching portion of name is removed
 and prepended to suffix. By proper use of
 @suffixlist, you can remove file types or
 versions for examination.

--end quote

Note the last sentence: "By proper use of @suffixlist, you can remove
file types or versions for examination." Now, this is in sync with the
usual verbiages of unix man pages, of mentioning irrevalent things.
Why the fuck do i need to know what is version, or examination what??
Not every morons in this world is using unix with its morinic
convention of appending things to file names as a versioning system,
and not every moron in this world need to "exam" things. The unix
irrevalency, inprecision, driveling are paragoned above.

Here is a better documentation for the fileparse subroutine.

 fileparse

 fileparse divides a file name into 3 parts:
 directory string, file name, file name
 suffix. fileparse($filename, @suffixes) returns a
 array of 3 elements ($name, $dir_path,
 $suffix). The concocted result of
 "dir_path$name$suffix" is guaranteed to equal to
 $filename. The @suffixes is a array of strings,
 for example ('\.html', '\.txt', '\.png'). These
 strings are interpreted to be regular
 expressions, and is matched against the end of
 $filename.


But NOOO, perl morons are too enamored with driveling to write such
functional spec, after all, the code is sloppy and they don't REALLY
know what the code really does. This is not just one incompetence.
Perl is filled with them.

This report is on Perl version:
  This is perl, v5.8.1-RC3 built for darwin-thread-multi-2level
  (with 1 registered patch, see perl -V for more detail)

--

To the rookie programers out there, i advice against learning Perl.
(i suggest Python instead) Please see
 http://xahlee.org/UnixResource_dir/perlr.html

 Xah
 xah at xahlee.org
 http://xahlee.org/PageTwo_dir/more.html


From carroll at tjc.com  Wed Jan 14 18:31:32 2004
From: carroll at tjc.com (Terry Carroll)
Date: Wed, 14 Jan 2004 23:31:32 GMT
Subject: best book
References: <mailman.372.1074117050.12720.python-list@python.org>
Message-ID: <t1kb0011sp7p3804ueoujjjeihsu1tkb2m@4ax.com>

On Thu, 15 Jan 2004 03:32:31 +0530, km <km at mrna.tn.nic.in> wrote:


>What is the best book to start with python ? i am have been working since 1 yr with Perl. 

My favorite to start is O'Reilley's "Learning Python."

Try to borrow it, rather than buy it, though, or at least buy a used copy.
Once you know Python, you won't be using this book for much; you'll be
using the online documentation or a reference-type book like (my favorite)
"Python in a Nutshell".

You'll probably get a bunch of responses, saying "You don't need a book,
use the online tutorials," but if you're like me, you like the idea of
curling up on the couch or in bed with an honest-to-goodness *book.*

If not, there *are* a lot of good tutorials.  A good place to start is
<http://www.python.org/topics/learn/>.



From Mike at DeleteThis.Geary.com  Fri Jan 23 11:37:53 2004
From: Mike at DeleteThis.Geary.com (Michael Geary)
Date: Fri, 23 Jan 2004 08:37:53 -0800
Subject: debugging
References: <88bc63c6.0401230416.7acf904c@posting.google.com>
Message-ID: <1012jf28chjio61@corp.supernews.com>

Doug Farrell wrote:
> Can someone help me out a little with Python? What do people
> use to debug Python code? I don't understand how to use the
> built in debugger and I haven't had any luck getting ddd to
> debug my Python programs. I end up falling back on
> inserting print statements in my code to figure out what's
> going on. This works but isn't always the fastest route to a
> solution. So, I'm just wondering what other people do.

What OS are you running?

On Windows, PythonWin has a nice interactive debugger.

My favorite is Komodo, which is available for Windows, Linux, and Solaris:

http://www.activestate.com/Products/Komodo/

Komodo is not free, but the personal edition is pretty cheap, and the
commercial edition is well worth the price for commercial development.

-Mike




From just at xs4all.nl  Tue Jan 13 05:13:26 2004
From: just at xs4all.nl (Just)
Date: Tue, 13 Jan 2004 11:13:26 +0100
Subject: problems with dict() in python 2.2
References: <shPMb.6507$k4.144431@news1.nokia.com>
Message-ID: <just-491005.11132613012004@news1.news.xs4all.nl>

In article <shPMb.6507$k4.144431 at news1.nokia.com>,
 Olaf Meyer <nomail at nospam.net> wrote:

> I'm trying to build a dictionary using python's dict type, but somehow 
> it does not work the way I expect it to. Here's the code:
> 
> Python 2.2.1 (#7, Jan  9 2004, 16:59:31) [C] on hp-ux11
> Type "help", "copyright", "credits" or "license" for more information.
>  >>> data=dict(red=1)
> Traceback (most recent call last):
>    File "<stdin>", line 1, in ?
> TypeError: 'red' is an invalid keyword argument for this function
> 
> What am I doing wrong?

You're using a 2.3 feature in 2.2.

Just


From newspost at lolmc.com  Sun Jan 25 17:28:30 2004
From: newspost at lolmc.com (Lol McBride)
Date: Sun, 25 Jan 2004 22:28:30 +0000
Subject: MySQL insert query problem
Message-ID: <pan.2004.01.25.22.28.29.641943@lolmc.com>

Hi all,
I'm using Python 2.3 and the MySQLDB module on a Mandrake Linux 9.2 system
and I'm encountering a problem whentrying to insert a string object intoa
varchar field in a database I'm using. The query being sent to the MySQL
server  by my program is : INSERT INTO analysis (DrawNumber,pool1)VALUES
(847, ' (4, 8, 21, 24, 39, 44) ' ) ;

But the field pool1 actually contains  (4, 8, 21, 24, 39, i.e it is
missing the final digits ( 44 ) and the closing bracket.The program writes
a number of rows into the database and they all exhibit the same behaviour
- could anyone shed some light on this problem? Thanks,
Lol McBride


From zunbeltz at wm.lc.ehu.es.XXX  Fri Jan  9 02:41:29 2004
From: zunbeltz at wm.lc.ehu.es.XXX (Zunbeltz Izaola)
Date: 09 Jan 2004 08:41:29 +0100
Subject: __init__, __slot__ and **keywordargs
Message-ID: <m1fzep36xi.fsf@lcpxdf.wm.lc.ehu.es>


Hi,

I'm playing with __slot__ (new class) and the __init__ method of my
class. I want the arguments of __init__ to be keywords and that the
method initialize all the attributes in __slot__ to None except those
in the argument of __init__ (Is this a good practice?). I've the
following class

class PersonalData(object):

    __slot__ = ("Firstname",    # Firstname of the person.
                "Surname",      # Surname of the person.
                "Birthdate",    # Birthdate of the person.
                "Nationality"   # Nationality of the person.
                )

    def __init__(self,**args):
        for kwrd, value in args.items():
                self.__setattr__(kwrd,args[kwrd]

#        for arg,value in args.items():
#            if arg in self.__slot__:
#                self.__setattr__(arg,value)
#            else:
#                errmsg = str(self.__class__.__name__)
#                errmsg += "object has not attribute " + arg 
#                raise AttributeError, errmsg

    def __str__(self):
        buffer = ""
        for attr in self.__slot__:
            if attr in self.__dict__.keys():
                buffer += attr + ": " + str(self.__getattribute__(attr)) + "\n"

The problem is that the __init__ defined can set attributes that are
not in the slot and i want to have an exception when someone tries to
do

inst = PersonalData(noattribute = "Smith")

I've coded the solution in the fragment that is commented, raising and
exception manually. Someone knows a more elegant solution and can
explain with the first definition didn't raise and exception?

Thanks in advance 

Zunbeltz
-- 
Remove XXX from email: zunbeltz at wm.lc.ehu.esXXX


From marco at bubke.de  Wed Jan  7 03:30:45 2004
From: marco at bubke.de (Marco Bubke)
Date: Wed, 07 Jan 2004 09:30:45 +0100
Subject: Scoped Lock
References: <bt9ovs$p92$1@graf.cs.uni-magdeburg.de>
	<3ff8a259$0$121$e4fe514c@dreader10.news.xs4all.nl>
	<m37k06720b.fsf@pc150.maths.bris.ac.uk>
Message-ID: <btgg3m$nlg$1@graf.cs.uni-magdeburg.de>

Michael Hudson wrote:

> Ype Kingma <ykingma at accessforall.nl> writes:
> 
>> Marco Bubke wrote:
>> 
>> > Hi
>> > 
>> > There is the Lock object in the threading module.
>> > But there is no medode there I could aquire a scoped
>> > lock like:
>> > 
>> > mutex = threading.Lock()
>> > my_lock = mutex.scoped_acquire() # maybe scoped_lock()
>> > #now this stuff is locked
>> > 
>> > del mylock
>> > 
>> > #the lock is released.
>> > 
>> > def do_domething:
>> >   my_lock = mutex.scoped_acquire()
>> >   #now this stuff is locked
>> >   #the lock is released after its out of scope
>> > 
>> > 
>> > I have written this my own but I'm not sure there is a drawback
>> > because its looks so convinent. So I wonder why its not in
>> > the module?
>> 
>> Some reasons:
>> - What should happen when an exception happens during the locked stuff?
>> - It is possible pass a reference to the lock during the locked stuff,
>>   so although the lock goes out of local scope, there still might be
>>   a reference to it.
>> - The moment that __del__() is called is not guaranteed.
>> 
>> You can also do it like this:
>> 
>> mutex = threading.Lock()
>> mutex.acquire()
>> try:
>>     # now this stuff is locked
>> finally:
>>     mutex.release() # explicit is better than implicit
> 
> This is the way to do it today.  There's PEP 310 which, if accepted,
> makes this at least shorter to write... (and PEP 310 references a
> lengthy discussion about whether using __del__ like this is wise).

Thats looks really nice.

thx

Marco



From rick_muller at yahoo.com  Sat Jan 17 23:23:02 2004
From: rick_muller at yahoo.com (Rick Muller)
Date: 17 Jan 2004 20:23:02 -0800
Subject: Does anyone else not find the fun in programming...?
References: <d232c5e.0401130823.27fd26ff@posting.google.com>
Message-ID: <5eb8fb88.0401172023.737e05d6@posting.google.com>

chris.lyon at spritenote.co.uk (Chris Lyon) wrote in message news:<d232c5e.0401130823.27fd26ff at posting.google.com>...
> I find python very effective as a language and can generally project
> most of my hazy thoughts into it. But FUN !!! This is work dammit,
> I have now ground my teeth down from the number of times I read that
> programming is fun. Football (association) is fun, walking along
> canals is fun, Arguing about quite how useless the British Government
> is fun but programming  ?
> 
> Do I need help ?
> 
> (Actually typing this was quite fun, so perhaps)


I never found programming fun until Python. But I find Python's syntax
so natural that I can write little toy codes almost effortlessly and
try out ideas, which I find incredibly gratifying. Plus, I really like
the fact that so many cool things are included in the Python
distribution, so I can play around with list comprehensions or XML
parsing when the mood strikes.

However, I should point out that I'm a scientist, not a computer
scientist. I have a feeling that if all I got paid to do, day in and
day out, was write code, I might see Python as merely another tool of
management's oppression. So I know where you're coming from.

R.


From just at xs4all.nl  Tue Jan  6 03:40:24 2004
From: just at xs4all.nl (Just)
Date: Tue, 06 Jan 2004 09:40:24 +0100
Subject: tuple.__hash__()
References: <pan.2004.01.06.08.17.30.910345@thomas-guettler.de>
Message-ID: <just-443724.09402406012004@news1.news.xs4all.nl>

In article <pan.2004.01.06.08.17.30.910345 at thomas-guettler.de>,
 "Thomas Guettler" <guettli at thomas-guettler.de> wrote:

> Can someone point me to the documentation
> of tuples __hash__ method?
> 
> I want to unique a list of tuples. Since
> __hash__ returns a 32 bit integer, there
> could be a situtation where two different tupples
> return the same value.

That's a basic propery of hashing in general, no?

> >>> t1=(1, 2, 3)
> >>> t1.__hash__()
> -821448277
> >>> t2=(1, 2, 3)
> >>> t2.__hash__()
> -821448277

Not sure what your point is here: you're showing that two _equal_ tuples 
have the same hash value.

> Is there a dictionary type which uses __cmp__() like
> btrees in the standard library?

I don't think so.

Just


From http  Mon Jan  5 16:28:35 2004
From: http (Paul Rubin)
Date: 05 Jan 2004 13:28:35 -0800
Subject: local interpreter remote machines
References: <btcka7$phd$1@solaris.cc.vt.edu>
Message-ID: <7x4qvaxeyk.fsf@ruckus.brouhaha.com>

hokieghal99 <hokiegal99 at hotmail.com> writes:
> This may not be possible, but I thought I'd ask anyway. Could I get
> the below code to run on a Python server where other machines would
> connect to it (say thru the Web) and get details of *their* system
> instead of the system details of the machine that the interpreter is
> running on? Any ideas?

In general, what you're asking for is called OS fingerprinting.  It's
an active topic in security research.  Figuring out a remote system's
OS is the first step towards breaking into it, so there's a slow but
growing effort among OS implementers to thwart attempts at
fingerprinting.

In simple cases, though, you can do stuff like connect to the remote
IP address's port 80 and see if you can get any HTTP server headers to
examine, and stuff like that.  

OS's also leave inadvertent fingerprints, like the "randomly
generated" TCP sequence numbers which have detectable statistical
patterns on some systems.  If you can detect such a pattern, that
often lets you identify the remote OS.


From zanesdad at bellsouth.net  Mon Jan 19 06:18:00 2004
From: zanesdad at bellsouth.net (Jeremy Jones)
Date: Mon, 19 Jan 2004 06:18:00 -0500
Subject: ANN: Munkware 0.3
Message-ID: <20040119111800.GA689@cerberus>

Munkware, a transactional and persistent queueing mechanism, is proud to
announce version 0.3 for public consumption.  One bug fix in this release:
 
- Now checks for proper index on all put_commit() and get_commit() calls.

The Sourceforge Project page is located at
http://sourceforge.net/projects/munkware/ and the project home page is located
at http://munkware.sourceforge.net/
 
I'm currently working on a quasi-RESTish (web services/HTTP) interface for
Munkware rather than going the SOAP route that I had initially thought.  I've
got a design about 3/4 of the way hammered out, but no code so far on that.  I'm
planning on (at least as a first stab) using the standard library BaseHTTPServer
to run it from.  Hopefully, I'll be able to get something present-able in the
next couple of weeks.

If you have any suggestions, please feel free to email them to me.


Jeremy Jones



From jcarlson at uci.edu  Tue Jan 20 00:15:31 2004
From: jcarlson at uci.edu (Josiah Carlson)
Date: Mon, 19 Jan 2004 21:15:31 -0800
Subject: stack-like file object
References: <400be8f3_2@nova.entelchile.net>
	<20040119183719.ABC4.JCARLSON@uci.edu>
	<mailman.531.1074572934.12720.python-list@python.org>
Message-ID: <20040119211320.D6B9.JCARLSON@uci.edu>

> > While I don't condone the use of files as stacks, the below should work
> > for you.  It doesn't reduce in size when an object is removed, but as
> > long as you don't try to share the stack between processes or threads,
> > it should work fine.
> 
>   condone
>        v : excuse, overlook, or make allowances for; be lenient with;
> 
>   Jp

I was using it in a similar tone as: "I don't condone the robbing of
banks, but below is a plan to do so, if one were to want to."

 - Josiah



From gagenellina at softlab.com.ar  Fri Jan  2 21:01:56 2004
From: gagenellina at softlab.com.ar (Gabriel Genellina)
Date: Fri, 02 Jan 2004 23:01:56 -0300
Subject: Keyboard browsing (was Re: ANN: Python Language Reference)
In-Reply-To: <bt51rb$c6f$1@panix2.panix.com>
References: <b16e4ef7.0312260911.42e26052@posting.google.com>
	<bskgj5$gb6$1@panix2.panix.com>
	<cb035744.0312290109.156cd633@posting.google.com>
	<slrnbvbouk.2i08.kamikaze@kuoi.asui.uidaho.edu>
Message-ID: <5.2.1.1.0.20040102224658.02429820@192.168.0.115>

At 2/1/2004 19:19, you wrote:

> >  Opera can be completely keyboard-driven.  And to search, you can type
> >/TEXT, just like you would in lynx or any other proper viewing or
> >editing tool.
>
>Really?  That's not in my Opera/Linux 6.1.

That really cool feature appeared in v7.20. But Ctrl-F = search in page 
works from prehistoric ages :)


Gabriel Genellina
Softlab SRL




From vidiv at gmx.net  Tue Jan 13 14:28:42 2004
From: vidiv at gmx.net (vidiv at gmx.net)
Date: Tue, 13 Jan 2004 20:28:42 +0100 (MET)
Subject: Terminal Emulation with IBM ES9672 mainframe via multiplexer.
Message-ID: <8411.1074022122@www20.gmx.net>

Hi All, 

Sorry for repeating, in the earlier msg i forgot to add a Subject line !! 

I am a student-newbie to Python-List (for that matter Python language)
working on a project for Terminal Emulation. The dumb terminal interacts
with an
IBM ES9672 mainframe through a 'multiplexer-MUX'. 
The s/w is currently running in 'C' on a Windows NT environment and the
requirement is to introduce Object Oriented concepts and C++ was the obvious
choice, but i came across  'Python' (and also Perl, Ruby, ..etc) after i
installed RH8 on my PC last month. We are actively canvassing the advantages
of GNU
s/w and philosophy and would like to simultaneously port it to GNU/Linux
platform.

I have read some of the documentation in Python.
Before using Python as our project language it would be useful to know
whether Python has functions, libraries/headers (like C does) capable of
handling
the foll. :

1] open and close serial ports,
2] set baud rates,
3] check parity bit/byte,
4] stop bits,
5] Hardware handshaking,
6] selection of port,......

Our existing 'C' code is to be ported to the GNU/Linux platform so we are
actively looking at an OOP concept. The part for serial port communication
in
C++ has classes so its easier to write customized programs to do most of the
above. 

Most importantly compatibility issues with the existing Multiplexer and
Cisco Routers have to be kept in mind as the company will *not* make any H/W
changes. 

We saw that python has some routines for using existing C code, so we dont
have to rewrite everything and can make modules containing functions and use
it to operate on files. 
Does it provide any other serial port communication features ?
It would be nice if anyone could throw some light on some of the above
issues.

Thankyou for your time.

Ciao, 
Vidya.


-- 
+++ GMX - die erste Adresse f?r Mail, Message, More +++
Neu: Preissenkung f?r MMS und FreeMMS! http://www.gmx.net





From fortepianissimo at yahoo.com.tw  Fri Jan  9 23:50:27 2004
From: fortepianissimo at yahoo.com.tw (Fortepianissimo)
Date: 9 Jan 2004 20:50:27 -0800
Subject: module for parsing email Received headers?
Message-ID: <ef08387c.0401092050.79564328@posting.google.com>

Does anyone know the existence of such module? I bet 90% of the chance
that the wheel was invented before. Thanks!


From deadlink27 at web.de  Thu Jan 29 13:05:31 2004
From: deadlink27 at web.de (Sebastian Stelzer)
Date: Thu, 29 Jan 2004 19:05:31 +0100
Subject: Get error "ImportError: No module named _tkinter"
Message-ID: <bvbhl1$1td$05$1@news.t-online.com>

Hi,

I'am a beginner in Python and I have got a problem with
the TKInter module.
When I want to start e.g. pysol, I get following output:
[output]
Traceback (most recent call last):
  File "/usr/share/games/pysol/src/pysol.py", line 47, in ?
    from main import main
  File "/usr/share/games/pysol/src/main.py", line 48, in ?
    from app import Application
  File "/usr/share/games/pysol/src/app.py", line 54, in ?
    from images import Images, SubsampledImages
  File "/usr/share/games/pysol/src/images.py", line 47, in ?
    from pysoltk import tkversion, loadImage, copyImage, createImage
  File "/usr/share/games/pysol/src/pysoltk.py", line 81, in ?
    exec "from " + m + " import *"
  File "<string>", line 1, in ?
  File "/usr/share/games/pysol/src/tk/tkconst.py", line 39, in ?
    import Tkinter
  File "/usr/local/lib/python2.3/lib-tk/Tkinter.py", line 38, in ?
    import _tkinter # If this fails your Python may not be configured for Tk
ImportError: No module named _tkinter
[/output]

I'am using Suse Linux 9.0 with Python 2.3.3.
Can anybody help me?
cu



From bkelley at wi.mit.edu  Tue Jan  6 07:57:47 2004
From: bkelley at wi.mit.edu (Brian Kelley)
Date: Tue, 06 Jan 2004 12:57:47 GMT
Subject: Project dream
In-Reply-To: <qN7Kb.21419$lo3.12729@newsread2.news.pas.earthlink.net>
References: <cb035744.0312261236.11d785ac@posting.google.com>
	<f70e3538.0401032044.46de5bf4@posting.google.com>
	<qN7Kb.21419$lo3.12729@newsread2.news.pas.earthlink.net>
Message-ID: <3FFAB26F.7030704@wi.mit.edu>

Andrew Dalke wrote:
> Lonnie Princehouse:
> 
>>I keep thinking that a good graph module would be really handy (as in
>>nodes and edges, not plotting)
> 
> 
> I've wondered about Boost.  There's Boost Python of course,
> and Boost includes a graph library with many of the features you've
> listed.  But do the two work well together?  I dunno.
> 
> 
>>with the ability to traverse and manipulate graphs in nice Pythonic ways,
> 
> 
> And I really don't know if the result will feel Pythonic.  I barely
> understand how to make the examples work, much less what
> needs to be done to get a full melding.
> 
> 
>>basic graph theory (finding cycles, paths, cliques, etc).  I've
>>started writing one, but it's nowhere near completion.
> 
> 
> I have two C extensions for Python which do max clique detection.
> See http://starship.python.net/crew/dalke/clique/ .  But I haven't
> tested them in over 4 years.
I have and just last year.  They work pretty well but I think that there 
might be better algorithms.  I had them working under python 2.2 but 
they aren't useful out of the box since there is no driver.  I can 
package it with the one that I have (the graph is represented as a 
numeric matrix) if anyone is really interested.
> 
> BTW, I've done various bits of graph theory work for molecular
> structures.  I've found that the nomenclature is different enough
> that it's hard for chemistry and graph theory to share each other's
> data structures directly.  (Eg, we want "atoms", which are
> "colored nodes", and "bonds", which are "colored undirected
> edges" of low valence (usually 4 or less, rarely above 6, and
> never larger than about 13.)

This is a bit of a pain, algorithms might want to use node and edge or 
vertex and edge while chemists want to use atom and bond.

> Still, I'll be interested in anything you have, especially
> subgraph isomorphism.  (There is Brian Kelly's "Frowns"
> package which has a Python interface to the VF algorithm
> but it needs to convert to VF's data structures before doing
> the search, and that apparently takes most of the time.)

I have minimized this somewhat, but I expect that it still is going to 
be slow to keep parallel graph structures (python->C++) (python->boost). 
  I have almost completed a pure-python version of vflib, mainly for the 
purpose of doing recursive graph searching.  It doesn't appear to be 
much slower than the C++ counterpart and doesn't have the start up time 
conversion.  The vflib package is available seperately from frowns by 
the way.

> 
>                     Andrew
>                     dalke at dalkescientific.com
> 
> 

Brian.



From omission9 at invalid.email.info  Mon Jan 26 00:03:39 2004
From: omission9 at invalid.email.info (omission9)
Date: Mon, 26 Jan 2004 05:03:39 GMT
Subject: efficient updating of nested dictionaries
In-Reply-To: <H%_Qb.2609$925.1917@nwrddc02.gnilink.net>
References: <H%_Qb.2609$925.1917@nwrddc02.gnilink.net>
Message-ID: <Lc1Rb.1405$kg4.258@nwrddc01.gnilink.net>

omission9 wrote:

> I have a dictionary that looks like this
> MY_DICT[KEY_X][KEY_Y][KEY_Z]=FOO
> 
> I am having a problem updating this with a simple 
> MY_DICT.update(NEW_DICT) as update doesn't seem to care about getting 
> into the inner dicts.
> Getting the keys of each and iterating through and updating each one is 
> terribly slow as the number of keys gets bigger and bigger.
> What is the bst way to update my nested dicts?
> 
> 
> 
So far I have found this on the internet:
     def rUpdate(self,targetDict,itemDict):
     	valtab=[]		
     	for key,val in itemDict.items():
     	    if type(val)==type({}):
     	        newTarget=targetDict.setdefault(key,{})
     	        self.rUpdate(newTarget,val)
     	    else:
		targetDict[key]=val

However, this does not seem to handle the fact that each dict has 
multiple keys. :( So far the modification I have made to make it work 
right have failed. Any ideas?



From msurette at laframboise.net  Wed Jan 28 09:33:04 2004
From: msurette at laframboise.net (Michael Surette)
Date: Wed, 28 Jan 2004 14:33:04 GMT
Subject: pexpect exceptions
References: <pan.2004.01.26.22.07.43.147063@laframboise.net>
	<c3a209a.0401280121.4fcf9798@posting.google.com>
Message-ID: <pan.2004.01.28.14.32.42.339300@laframboise.net>

On Wed, 28 Jan 2004 01:21:49 -0800, Manuel de Ferran wrote:

> Michael Surette <msurette at laframboise.net> wrote in message news:<pan.2004.01.26.22.07.43.147063 at laframboise.net>...
>> I have been trying to automate the changing of passwords using python and
>> pexpect.  I wrote a script as a test and it works, except that it gives me
>> an exception when it stops running:
>> 
>> Exception exceptions.OSError: 
>> (10, 'No child processes') in <bound method spawn.__del__ of
>> <pexpect.spawn instance at 0x403d938c>> ignored
>> 
>> What is happening and how do I get rid of the exception?
>> 
>> I am running python 2.3.2 under Slackware linux 9.1 and pexpect 0.99. 
>> Here is the script:
>> 
>> #!/usr/bin/python
>> import pexpect
>> import sys
>> 
>> if len(sys.argv) != 3:
>>   print 'usage error!'
>>   raise SystemExit
>> 
>> name= sys.argv[1]
>> passwd= sys.argv[2]
>> 
>> a= pexpect.spawn('passwd %s'%name)
>> 
>> changed= False
>> while not changed:
>>   i= a.expect(['[Nn]ew password:','[Cc]hanged'])
>>   if i == 0:
>>     a.sendline(passwd)
>>   elif i == 1:
>>     changed= True
> 
> I have the same issue with the following code :
> #!/usr/bin/env python
> '''This runs "ls -l" on a remote host using SSH.
>     At the prompts enter hostname, user, and password.
> '''
> import pexpect
> import getpass
> 
> host = raw_input('Hostname: ')
> user = raw_input('User: ')
> password = getpass.getpass('Password: ')
> 
> child = pexpect.spawn("ssh -l %s %s /bin/ls -l"%(user, host))
> 
> child.expect('password:')
> child.sendline(password)
> 
> child.expect(pexpect.EOF)
> print child.pid,'middle',child.isalive()
> 
> print child.before
> 
> This is a slighty modified version of sshls.py (shipped with
> pexpect-examples). I've only added "print
> child.pid,'middle',child.isalive()"
> and I get the same exception : "exceptions.OSError: (10, 'No child
> processes')"
> 
> The weird thing I can't explain is that, I don't get the exception
> without ",child.alive()"

I have found a solution and an explanation.

Adding "a.close(False)" as a last line of my script fixes the problem.
The spawn.close() function calls os.pidwait() with your child process pid.
 In our two cases, that pid is dead and os.pidwait rightfully raises an
 exception.  Calling spawn.close() with a False argument bypasses this
 call.



From cwilcox at etcconnect.com  Wed Jan 21 12:48:48 2004
From: cwilcox at etcconnect.com (Christian Wilcox)
Date: Wed, 21 Jan 2004 11:48:48 -0600
Subject: Help, *.CHM, etc -> *nix .chm viewer
Message-ID: <69A0D4AB81C51447AD6BA387782B8D6401343F78@midl-mail4.etcconnect.com>

> I wonder if anyone has written a cross-platform CHM decoder and browser
> that has the help browser look & feel.  I can't find one, but it seems
> that python would be a great language to make such a thing.  Maybe
> I'll take a crack if it hasn't been done.  I like monolithic,
> compressed help vs. a big directory full of html.

http://xchm.sourceforge.net/

Description from the page:

xCHM is a .chm viewer for UNIX (Linux, *BSD, Solaris), written by Razvan Cojocaru.
Success stories of xCHM on Mac OS X have also been received, and apparently xCHM even works if compiled under the Cygwin environment in Windows.

HTH

Christian Wilcox



From alert at notification.messagelabs.com  Tue Jan 27 09:39:02 2004
From: alert at notification.messagelabs.com (alert at notification.messagelabs.com)
Date: 27 Jan 2004 14:39:02 -0000
Subject: WARNING. You sent a potential virus or unauthorised code
Message-ID: <20040127143902.21330.qmail@server-20.tower-27.messagelabs.com>

For English instructions please scroll down.

ISION MailScan hat einen potenziellen Virus 
oder eine verd?chtige Datenstruktur in einer 
von Ihnen verschickten oder an Sie 
gesendeten Nachricht entdeckt. 
____________________________________________________________

Einige Informationen zu der infizierten eMail
____________________________________________________________
Zur besseren Identifikation der Nachricht:

Der Absender der Nachricht war: 
    python-list at python.org

Der Empf?nger der Nachricht war: 
    serg at spiegel.de

Der Betreff war: '(empty)'
Die Nachricht wurde verschickt am Tue, 27 Jan 2004 14:36:08 +0100
Um die Nachricht genauer zu identifizieren:

Scanner 7 (Unpacker) berichtet folgendes:
>>> W32/MyDoom.A in '508073_2X_PM4_EMS_MA-OCTET=2DSTREAM__text.exe'


Die Originalnachricht ist in den ISION Quarant?ne_Server umgeleitet 
worden, in 
mail server server-20.tower-27.messagelabs.com (id 508073_1075214341)
und wird dort f?r 30 Tage gespeichert bevor sie endg?ltig gel?scht wird.
____________________________________________________________

Weitere Hilfe
____________________________________________________________
Lesen Sie bitte die haeufig gestellten Fragen (
FAQ)  fuer eine solche Situation unter
http://www.ision.net/mailscan/faq
Hier werden die meisten Ihrer Fragen 
beantwortet. 
Wenn Sie weitere Informationen ben?tigen 
oder glauben, dass es sich um einen falschen 
Alarm handelt, kontaktieren Sie bitte das 
ISION Customer Interaction Center unter

support at ision.net

Sollten Sie mit dem Support in Kontakt treten, 
geben Sie bitte immer die nachfolgende Virus 
Identifikationsnummer an:
{{{ mail server server-20.tower-27.messagelabs.com (id 508073_1075214341) }}}
______________________________________

Diese Nachricht wurde von ISION MailScan 
unter Nutzung des MesssageLabs Virus Control 
Centers auf  alle bekannten Viren untersucht. 
Wenn Sie mehr ?ber diese Dienstleistung 
erfahren m?chten, besuchen Sie
http://www.ision.net/mailscan/faq
_________________________________________________________________

*************************ENGLISH*********************************
ISION Mailscan discovered a possible
virus or unauthorised code (such as a joke program or trojan)
in an email sent by you.

Please read this whole email carefully. It explains what has
happened to your email, which suspected virus has been caught,
and what to do if you need help.

____________________________________________________________

Some details about the infected message
____________________________________________________________

To help identify the email:

The message was titled '(empty)'
The message date was Tue, 27 Jan 2004 14:36:08 +0100
The message identifier was (empty)
The message recipients were 
    serg at spiegel.de


To help identify the virus:

Scanner 7 (Unpacker) reported the following:

>>> W32/MyDoom.A in '508073_2X_PM4_EMS_MA-OCTET=2DSTREAM__text.exe'


The message was diverted into the virus holding pen on
mail server server-20.tower-27.messagelabs.com (id 508073_1075214341)
and will be held for 30 days before being destroyed.


____________________________________________________________

What should you do now?
____________________________________________________________

If you sent the email from a corporate network, you should first
contact your local Helpdesk or System Administrator for advice.
They will be able to help you disinfect your workstation.

If you sent the email from a personal or home account, you will
need to disinfect your computer yourself. To do this you will
need an anti_virus program. We suggest using one of the leading
industry anti_virus packages such as McAfee, F_Secure or Cybersoft,
which cost ?15_?30 per copy.
____________________________________________________________

Getting more help
____________________________________________________________

You may like to read the Support FAQs at
http://www.ision.net/english/mailscan/faq 
These will answer many of the most common queries.

If you believe this message to be a false alarm or you require
further assistance, you can email ISION UK Support at:_

   	support at ision.net.uk

or contact ISION Internet by telephone on:_

	+44 (0) 208 293 73 00 

Please quote the following Virus Pen ID when contacting Support.
{{{ mail server server-20.tower-27.messagelabs.com (id 508073_1075214341) }}}

________________________________________________________________________
This email has been scanned for all viruses by the MessageLabs Email
Security System. For more information on a proactive email security
service working around the clock, around the globe, visit
http://www.messagelabs.com
________________________________________________________________________



From swalters_usenet at yahoo.com  Sun Jan 11 02:29:47 2004
From: swalters_usenet at yahoo.com (Samuel Walters)
Date: Sun, 11 Jan 2004 07:29:47 GMT
Subject: QOTW?
References: <ryELb.238$tK2.228@amstwist00> <btn5db$2f8$1@absinth.dialog.net.pl>
	<pan.2004.01.09.21.35.40.132608@yahoo.com>
	<mailman.262.1073742614.12720.python-list@python.org>
Message-ID: <pan.2004.01.11.07.28.26.422741@yahoo.com>

|Thus Spake Skip Montanaro On the now historical date of Sat, 10 Jan 2004
07:50:09 -0600|

> 
> QOTW perhaps?
> 
>     Sam> I read the benchmark and I think it doesn't measure python in
>     it's Sam> target area.  That's like taking a world-class marathon
>     runner and Sam> wondering why he doesn't compete well in a
>     figure-skating event.
> 
> Skip

*garsh*

I feel flattered. *blush*

You know, I sadly spent quite a bit of time debating which simile to use
there.  I wandered around the house wondering what to put there.

Some rejected ideas:
	"It's like asking Kasparov why he didn't win the weight-lifting
	 competition."

	"That's like asking a world-class marathon runner why he doesn't compete
	 well in a weight-lifting competition."

	"That's like asking a world-class weightlifter why they didn't do well in
	 the figure skating competition."  (I almost used this one because it
	 conjures images of a burly Russian weight-lifter floundering on ice
	 skates.  Very Monty-Python-esque.)

I chose the one I did in case I needed to later state that "Both figure
skating and marathon running are aerobic sports, but that doesn't mean
that the skills involved are the same."

.

Now, I feel compelled to justify my statement.

Let's look closely at the benchmarks and try to figure out if there's a
good reason why we fell down where we did.

We did poorly at Math, and competitively at I/O.

I'm reminded of Antoine de Saint-Exupe'ry saying "A designer knows he has
achieved perfection not when there is nothing left to add, but when there
is nothing left to take away."  While not part of the Zen of Python, this
seems to be an unstated principle of Python's design.  It seems to focus
on the bare minimum of what's needed for elegant expression of algorithms,
and leave any extravagances to importable libraries.

Why, then, are integers and longs part of Python itself, and not part of a
library?  Well, we need such constructs for counters, loops and indexes. 
Both range and xrange are evidence of this.  Were it not for this, I
daresay that we'd have at least argued the necessity of keeping these
things in the language itself.

Floats are a pragmatic convenience, because it's nice to be able to throw
around the odd floating point number when you need to.  Trig functions are
housed in a separate library and notice that we didn't do too shabby there.

I/O is one of our strengths, because we understand that most programs are
not algorithmically bound, but rather I/O bound.  I/O is a big
bottle-neck, so we should be damn good at it.  The fastest assembly
program won't do much good if it's always waiting on the disk-drive.

Perhaps our simplicity is the reason we hear so many Lisp'ers vocally
complaining.  While more pragmatic than Lisp, Python is definitely edging
into the "Lambda Calculus Zone" that Lisp'ers have historically been the
proud sole-occupants of.  After all, until Python, when one wanted a
nearly theoretical programming experience, one either went to C/Assembly
(Turing Machine Metaphor) or Lisp (Lambda Calculus Metaphor.)

Python is being used in so many introductory programming courses for the
very reason that it so purely fits the way a programmer thinks, while
still managing to be pragmatic.  It allows for a natural introduction to
some of the hardest concepts:  Pointers/Reference, Namespaces, Objects and
Legibility.  Each of these concepts is difficult to learn if you are first
indoctrinated into an environment without them.  In my attempts to learn
C++, I initially felt like I was beating my head up against a wall trying
to learn what an object was and why one would use them.  I have since
observed that people coming from a strongly functional programming
background have the same experience, while those with no functional
programming dogma in them find objects quite a natural concept.  The same
thing is true of the other concepts I mentioned.  If you have them, it's
easy to work without them.  If you don't, you'll flounder trying to pick
them up.  Think about how easy it is to pick out a C programmer from their
Python coding style.

The one important concept I didn't mention is message-passing.  This is an
important, but much less used concept.  It is the domain of Smalltalk and
Ruby.  I've looked some at Ruby, and lurk their Usenet group.  From what I
can tell, Ruby takes almost the same philosophy as Python, except where we
think namespaces are a honking great idea, they think message-passing is a
honking great idea.  The nice thing about message-passing is that if you
have all the other concepts of OO down, message passing seems natural and
is not terribly difficult to "fake" when it's the only missing OO
primitive.  This is why C++, while not a message-based OO language, is
used so often in GUI's, an inherently message-based domain.  This is also
why we have such a nice, broad choice of GUI toolkits under Python despite
lacking a message primitive.


Well, I've blathered enough on this topic.
I hope, at least, that I've said something worthwhile.
Though, I doubt I've said anything that hasn't been said better before.

Caffeine, Boredom and Usenet are a dangerous mix.

Sam Walters.


-- 
Never forget the halloween documents.
http://www.opensource.org/halloween/
""" Where will Microsoft try to drag you today?
    Do you really want to go there?"""



From mnations at airmail.net  Tue Jan 27 00:35:06 2004
From: mnations at airmail.net (Marc)
Date: 26 Jan 2004 21:35:06 -0800
Subject: Pickling Tkinter widgets - Where does Python stand now?
Message-ID: <4378fa6f.0401262135.3e05d217@posting.google.com>

Hi all,

After some research I've decided that my previous question (Confusing
problem between Tkinter.Intvar...) was headed in the wrong direction.
Partly because I think I have a greater understanding of what was
happening, and partly because pickling Tkinter widgets is an issue
that seems to have been touched on over the years but never really
acted on.

Postings back to '96 have talked about the need to pickle Tk widgets.
People have asked about it at various points, and no one has ever
really even come up with a workaround (that I could find).

So I am wondering a couple of things: Are there any plans in the
future to alter Tkinter so that it will be Pickle compliant in the
main release? Has anyone ever found a workaround (whether through
altering the main Tkinter.py file or other) that will allow pickling
of Tk widgets.

Thanks,
Marc


From peter at cendio.se  Wed Jan 28 04:40:07 2004
From: peter at cendio.se (Peter Astrand)
Date: Wed, 28 Jan 2004 10:40:07 +0100 (CET)
Subject: Cross-version extension modules?
Message-ID: <Pine.LNX.4.44.0401281034490.12588-100000@maggie.lkpg.cendio.se>


If I build a extension module with Python 2.2 and then loads it with 2.3, 
I get:

RuntimeWarning: Python C API version mismatch for module _foo: This
Python has API version 1012, module _foo has version 1011.

How fatal is this? Is it safe to use the module anyway? If not, is it
possible to build the module differently, so that it actually is safe to
use it with different versions of Python?

-- 
Peter ?strand		www.thinlinc.com
Cendio			www.cendio.se
Teknikringen 3		Phone: +46-13-21 46 00
583 30 Link?ping






From alessandro at sephiroth.it  Sat Jan 17 05:29:36 2004
From: alessandro at sephiroth.it (Alessandro Crugnola *sephiroth*)
Date: Sat, 17 Jan 2004 10:29:36 GMT
Subject: dde
References: <8EFMb.102403$_P.3808599@news4.tin.it>
	<f3s900dhej5v8pd7dnurrpo0gl7i7v4d2k@4ax.com>
	<rSlNb.118089$_P.4278876@news4.tin.it>
	<udqe00t28lml4kfqpi2f0k3t191e6pqg2u@4ax.com>
Message-ID: <k88Ob.132138$_P.4749549@news4.tin.it>

> That's not an app, that's a file format.

no, I mean Flash MX 2004. The app.

"Tim Roberts" <timr at probo.com> ha scritto nel messaggio news:udqe00t28lml4kfqpi2f0k3t191e6pqg2u at 4ax.com...
> "Alessandro Crugnola *sephiroth*" <alessandro at sephiroth.it> wrote:
> >
> >"Tim Roberts" <timr at probo.com> wrote:
> >>
> >> What DDE app are you trying to control?
> >
> >macromedia Flash
>
 What app are you trying to
> control?  I would have guessed that a fancy app like Dreamweaver, for
> example, would probably be controllable by COM, which is easy in Python.
> -- 
> - Tim Roberts, timr at probo.com
>   Providenza & Boekelheide, Inc.




From phipps.xue at sap.com  Fri Jan  9 04:17:22 2004
From: phipps.xue at sap.com (Phipps Xue)
Date: Fri, 9 Jan 2004 17:17:22 +0800
Subject: MozPython: Why my MozPython did not work after installed
	successfully?
Message-ID: <btlrj5$9jq$1@news1.wdf.sap-ag.de>

Hello Dr. Schilz,

I installed MozPython 0.1.0 by your tutorial. But I can not see the output
in mozilla when I ran a test.py, there's no error message or item displayed.

Is there any possible problem or note? Could you please tell me the way to
see how the mozpython runs?

Here, I list my environment information below for you to make a diagnosis.

OS: Microsoft Windows XP
Mozilla: 1.5  installed in 'd:\Program Files\Mozilla'
Python: ActivePython 2.3.2 installed in 'd:\Program Files\Active Python'
System Environment Variables:
    - PYTHONPATH: d:\Program Files\Active Python\lib;f:\Projects\Python;'

Phipps




From mi-mal at o2.pl  Mon Jan 12 03:19:27 2004
From: mi-mal at o2.pl (Mimal)
Date: Mon, 12 Jan 2004 09:19:27 +0100
Subject: CGI module problem: duplicated output
In-Reply-To: <9smuvv0ou8qpilg9vlpgpqt45apalmur49@4ax.com>
References: <mailman.219.1073658628.12720.python-list@python.org>
	<9smuvv0ou8qpilg9vlpgpqt45apalmur49@4ax.com>
Message-ID: <bttl90$2rq$1@sea.gmane.org>

> Pardon me for saying so, but I don't believe you.  Your script must
> actually look like this:

Pardon me too, but I know what my script looks like. I'm not such a 
fool! I've tested this script under Windows NT + Python 2.1 and Windows 
XP + Python 2.3 with the same result.

To prove you, I copied YOUR code and pasted to *.py file. Than I made it 
executable and run it using console (./cgi.py). This is what it showed:

<html>Hello, world!</html>
Content-type: text/html

<html>Hello, world!</html>
<html>Hello, world!</html>
Content-type: text/html

<html>Hello, world!</html>

I know it's very strange. I don't get it and that's why I need help. :-)

-- 
Mimal





From wweston at att.net  Thu Jan 29 22:02:26 2004
From: wweston at att.net (wes weston)
Date: Fri, 30 Jan 2004 03:02:26 GMT
Subject: conditional expression sought
In-Reply-To: <P6iSb.334480$ts4.82507@pd7tw3no>
References: <pRbSb.330334$ts4.37644@pd7tw3no>
	<mailman.1000.1075402284.12720.python-list@python.org>
	<P6iSb.334480$ts4.82507@pd7tw3no>
Message-ID: <6PjSb.138487$6y6.2697536@bgtnsc05-news.ops.worldnet.att.net>

Elaine,
    The last code line:

print "I would have liked this to be B[2] = ",B[2]

prints the value of B[2]; the value you don't want.
I think what you meant was that you want B[2] to be
0.0 not false. bool(0.0) does equal false.
---------------------------------------------------
The code:

A.append(bool(randint(0,1)))

will always yield an A of [true,true,true]
---------------------------------------------------
I didn't know this about python, and I'm not sure I
like it:

wes at linux:~/amy> python

 >>> print 1.1 and 2.2
2.2
 >>> print 2.2 and 1.1
1.1
 >>> print (1.1 and 2.2)
2.2

The order is important. To me, it should be printing true
and not either number or the last number.



From miki.tebeka at zoran.com  Sun Jan 11 02:56:18 2004
From: miki.tebeka at zoran.com (Miki Tebeka)
Date: 10 Jan 2004 23:56:18 -0800
Subject: Providing Default Value for User Input
References: <e3b4dc29.0401101643.3ea15ae3@posting.google.com>
Message-ID: <4f0a9fdb.0401102356.236040e1@posting.google.com>

Hello, 
> I have just begun learning Python so that I can write a simple script
> to make modification of a file used by another Python script easier.
> This file is basically a list of regular expressions. What I want to
> do is allow the user to select one of these regular expressions to
> modify, but I've realized I know of no way to provide a default value
> for user input. 
Which user input? raw_input, Tkinter, wxPython ...

> I could choose to show the regular expression the user
> has chosen and simply allow the user to retype it and modify it from
> there, but that is time consuming and error prone. Does Python support
> a way to do this? 
To do what? I don't understand your question. Maybe an example will
help.

> If worse comes to worst, is there a way I could
> write such code on my own without having to write a C-based module
> (I'd like to stick to Python code only since some users will be
> running this script on Windows without a C compiler)?
If you create a C extension you can distribute just the binary so your
users won't need a C compiler. (They might need some required DLL's
but you can ship them as well).

HTH.
Miki


From donn at drizzle.com  Sun Jan 25 13:27:12 2004
From: donn at drizzle.com (Donn Cave)
Date: Sun, 25 Jan 2004 18:27:12 -0000
Subject: Seem to be having trouble with Python/Bethon.
References: <PM0003D18B88B36E37@x1-6-00-a0-c9-e7-c3-de.ne1.client2.attbi.com>
	<6a2dnXCsJ60-9Yzd4p2dnA@giganews.com>
	<1074926701.236022@yasure> <ArHQb.141474$I06.1320223@attbi_s01>
Message-ID: <1075055229.911425@yasure>

Quoth Zoo Keeper <candiazoo at comcast.net>:
...
| Neither did I mean to imply that I was not sure if I wanted to use
| Python/Bethon.  I love Python, and I love BeOS.  Bethon seems to be the way to
| go, altho' I need to learn Bethon.

As far as I know, there's no alternative.  Just wanted to point out
that some limitations and impediments come with this path, compared
to C++.

On the other hand, Python may actually solve one problem that some
people claim is serious defect of BeOS.  When Be was alive, the
pervasively multithreaded architecture was supposed to be a big
advantage, but after they crashed, even Be engineers came out of
the woodwork to claim that the concurrency issues posed too difficult
of a problem for most developers and were thus responsible for a lot
of unreliable software.

I loved the thread-per-window architecture myself and never noticed
any problem, and at first I figured that might have been because
I fastidiously follow a queuing, event I/O model for thread interop
in my own application.  But Python itself takes some of the teeth
out of concurrency problems, because the interpreter doesn't run
in parallel.  So while your program executes in parallel, your code
doesn't - only the library functions are parallel.

	Donn Cave, donn at drizzle.com


From EP at zomething.com  Thu Jan 22 00:50:01 2004
From: EP at zomething.com (EP)
Date: Wed, 21 Jan 2004 21:50:01 -0800
Subject: a curious IDLE Error 
In-Reply-To: <400F5ABA.3090608@rogers.com>
References: <8g7u001k257pr6tjl3ng9t7pn3gvbq2328@4ax.com>
	<CEELJPECNGEGKFNDLHFFGEBKCCAA.perry@stsci.edu>
	<mailman.533.1074574795.12720.python-list@python.org>
	<bumghc$dsb$1@nrc-news.nrc.ca>
	<vpmt0058gq2hj2q8jh8pakm9d80eridvmv@4ax.com>
	<mailman.617.1074727375.12720.python-list@python.org>
	<8g7u001k257pr6tjl3ng9t7pn3gvbq2328@4ax.com>
Message-ID: <5.2.0.9.0.20040121213755.00b7e840@mail.zomething.com>

I'm not sure this error is of note, but it was curious to me (a puzzle).

Windows 2000, Python 2.3, using IDLE file editor and shell

I had a small script which imported string and worked fine until I added a 
std. input line:
	raw_input("some prompt")

It opened IDLE and died with error:
	'tuple' object not callable

I closed the IDLE shell, re-ran the module, which opened a new IDLE shell 
and repeated the same error.  Did this many times.

I opened a separate instance of Python (IDLE shell) and tried the raw_input 
function: it ran fine.
I ran my module at the Windows command prompt, and it ran fine.

I opened a new Python shell from the instance of IDLE editor where my 
module was open and tried the raw_input():

 >>> someFile=raw_input("enter:  ")
Traceback (most recent call last):
   File "<pyshell#36>", line 1, in ?
     someFile=raw_input("enter:  ")
TypeError: 'tuple' object is not callable


Can anyone point me in the right direction?


Eric

Apologies for the lack of proper analysis, I am all ears.




From thelastmohiccan at yahoo.com  Mon Jan 26 11:51:12 2004
From: thelastmohiccan at yahoo.com (lenk)
Date: Mon, 26 Jan 2004 18:51:12 +0200
Subject: Zope
In-Reply-To: <bv3f40$48q$1@newshost.mot.com>
References: <bv2j13$n4oug$1@ID-216549.news.uni-berlin.de>
	<bv3f40$48q$1@newshost.mot.com>
Message-ID: <bv3ggt$nm3gh$1@ID-216549.news.uni-berlin.de>

Stephen Boulet wrote:

 > Just wondering, it's not in /etc/init.d/zope* ?
 >

there is no zope path in etc/init.d/..
only /opt/zope/...........






From andrew-pythonlist at puzzling.org  Thu Jan  8 09:06:24 2004
From: andrew-pythonlist at puzzling.org (Andrew Bennetts)
Date: Fri, 9 Jan 2004 01:06:24 +1100
Subject: Twisted or Medusa or Zope
In-Reply-To: <425cc8d1.0401070808.14690325@posting.google.com>
References: <425cc8d1.0401070808.14690325@posting.google.com>
Message-ID: <20040108140624.GD551@frobozz>

On Wed, Jan 07, 2004 at 08:08:55AM -0800, mir nazim wrote:
> hi,
> i m planning to start writing intranet applications and want ur real

"intranet applications" is a very vague term.  Can you be more specific?

> cool advices for choosing the correct platform. the choice is between
> the three:
> 
> 1. Twisted
> 2. Medusa
> 3. Zope
> (i do not know any of the three).
> 
> i want u people to help me choose the correct platform. 

It depends :)

> my questions are:
> 
> 1. which has the least learning curve.

Depends on what you're trying to do.  Zope is probably easier to write most
kinds of web applications in, because that's what it's designed to do,
whereas Twisted is probably easier to implement a network protocol in,
because that's what it's designed to do.

I think this is the wrong question to ask.  The three packages you listed
above do quite different things, so the important issue isn't which is
easier to learn, but which is the right tool for your job.

> 2. which is best suited for the purpose for applications like workflow
> automation, groupware, and other business related apps.

How do you want people/systems to interact with your "workflow automation,
groupware, and other business related apps"?  A custom network protocol?
Remote procedure calls, e.g.  XML-RPC?  Web pages?  Something else?

> please also highlight the major diffrences between the three. 
> also tell if there is a better alternative.

Twisted: 

    Paraphrasing http://twistedmatrix.com/ slightly: "Twisted is an
    event-driven networking framework written in Python and licensed under
    the LGPL.  Twisted supports many different transports, such as TCP, UDP,
    SSL/TLS, multicast and Unix sockets.  Twisted includes a large number of
    ready-to-use protocol implementations, including HTTP, NNTP, IMAP, SSH,
    DNS, IRC, FTP.  Twisted also includes some applications implemented with
    these protocols, such as a web server and domain name server."

Medusa: 

    http://www.amk.ca/python/code/medusa.html says: "Medusa is a framework
    for writing asynchronous socket-based servers."  It is simpler and
    lower-level than Twisted.  This means it's harder to work with, but
    perhaps lighter-weight.  For new projects, I think Twisted is probably a
    better choice than Medusa.  Zope uses Medusa for its web server.

Zope:

    http://www.zope.org/ says: "Zope is an open source application server
    for building content managements, intranets, portals, and custom
    applications."  It's a web server with an integrated object database.
    Notably for you, there are "products" (i.e. modules) for Zope that
    include Workflow automation engines for document publishing -- I'm
    thinking of CMF here (http://cmf.zope.org/).  Plone
    (http://www.plone.org), which is built on CMF, is worth looking at if
    you are interested in the CMF.

My guess is that Zope is probably the tool best suited to your problem, but,
well, "it depends" :)

It's entirely possible that you might want more than one of these tools,
too!

-Andrew.




From nick889 at mail.com  Sun Jan  4 00:26:01 2004
From: nick889 at mail.com (Nick)
Date: 3 Jan 2004 21:26:01 -0800
Subject: Py2exe?? Error: Nothing to do?
References: <86df8ed4.0401031028.6edf2381@posting.google.com>
Message-ID: <86df8ed4.0401032126.4031bcc8@posting.google.com>

Yes, i did manage to get it to work, thank you.

Also, i am kinda new to the whole newgroups thing.  I am currently
posting from google.com and they say it takes several hours before the
groups are updated.  Is there anyway to make it so that the newgroups
are like update instantly.


From swalters_usenet at yahoo.com  Mon Jan  5 19:09:02 2004
From: swalters_usenet at yahoo.com (Samuel Walters)
Date: Tue, 06 Jan 2004 00:09:02 GMT
Subject: Python/C and PYTHONPATH
References: <btbn3o$5oo$1@ousrvr3.oulu.fi>
	<mailman.98.1073310473.12720.python-list@python.org>
	<btc2ng$alg$1@ousrvr3.oulu.fi>
	<pan.2004.01.05.22.04.32.450627@yahoo.com>
	<btcp2n$jod$1@ousrvr3.oulu.fi>
Message-ID: <pan.2004.01.06.00.07.02.165377@yahoo.com>

|Thus Spake Tero Pihlajakoski On the now historical date of Mon, 05 Jan
2004 22:39:19 +0000|
> I'll see if it's actually the C-part that's causing problems, but I worked
> it around by adding:
> 
> PyRun_SimpleString("import sys\nsys.path.insert(0,'')");
> 
> right after the Py_Initialize().
> 
> Works ok. Guess I'm "allowed" to do that(?)
IMLK (In My Limited Knowledge) that seems okay, but it also feels a bit
ham-handed.  try this snippet:

---untested code---
#include <string.h>
#include <stdlib.h>
/* prototyping may not be neccessary... dunno...*/
extern char *getenv(const char *name);
extern char *setenv(const char *name, const char *value, int overwrite);
/* comment them out if gcc complains about redeclarations. */

/* append something to pythonpath */
/* returns 0 on failure, 1 on creation of the env variable and 2 on an append
   oh, and -1 in cases of catastrophic miscompilation */
int myPyPathAppend(char *extrapath)
{
    char *buffer = NULL;
    /* size to taste... You should do this dynamically to avoid future buffer overrun attacks*/
    char eventual_path[1024] = { 0 };
    /* take note: after getenv, buffer points to an external constant character buffer.
       do NOT try to modify it directly.  use strcpy(char *dest, char *src)
       (he says knowingly... is she into photography mate?)
       */
    if( (buffer = getenv("PYTHONPATH")) == NULL )
    {
        /* we're here because PYTHONPATH is not already part of the environment. */
        
        setenv("PYTHONPATH", extrapath, 1); /* the last argument makes sure that we create the env var*/
        /* did it go happen ..  you should check this more rigorously*/
        if( (buffer = getenv("PYTHONPATH")) == NULL)
        {
            /* we failed... abend. */
            return 0;
        }
        else
        {
            /* success! cheers! */
            return 1;
        }
        return -1; /* dead code... should never reach here */
    }
    else
    {
        /* PYTHONPATH already exists.  append ';', then our new path and update it. */
                
        /* find the "=" in the buffer...
           from  string.h
           extern char *strstr (__const char *__haystack, __const char *__needle)
           there's a better way to do this, but I can't recall the function off the top of my head
        */
        buffer = strstr(buffer, "=") + 1; /* +1 because buffer points to the equals.  we want the string starting after it. */
        
        /* copy the old PYTHONPATH string */
        strcpy(eventual_path, buffer);
        strcat(eventual_path, ";");
        strcat(eventual_path, extrapath);

        setenv("PYTHONPATH", extrapath, 1); /* the last argument makes sure that we create the env var*/
        /* did it go happen ..  you should check this more rigorously*/
        if( (buffer = getenv("PYTHONPATH")) == NULL)
        {
            /* we failed... abend. */
            return 0;
        }
        else
        {
            /* success! cheers! */
            return 2;
        }
        return -1; /* dead code... should never reach here */
    }
    else
    {
        /* PYTHONPATH already exists.  append ';', then our new path and update it. */
                
        /* find the "=" in the buffer...
           from  string.h
           extern char *strstr (__const char *__haystack, __const char *__needle)
           there's a better way to do this, but I can't recall the function off the top of my head
        */
        buffer = strstr(buffer, "=") + 1; /* +1 because buffer points to the equals.  we want the string starting after it. */
        
        /* copy the old PYTHONPATH string */
        strcpy(eventual_path, buffer);
        strcat(eventual_path, ";");
        strcat(eventual_path, extrapath);

        setenv("PYTHONPATH", extrapath, 1); /* the last argument makes sure that we create the env var*/
        /* did it go happen ..  you should check this more rigorously*/
        if( (buffer = getenv("PYTHONPATH")) == NULL)
        {
            /* we failed... abend. */
            return 0;
        }
        else
        {
            /* success! cheers! */
            return 2;
        }
        return -1; /* dead code... should never reach here */
    }
    return -1; /* deader code... should *really* never reach here */
}
---untested code---
I haven't tested, compiled or even read through this code.
I'm late for a party and still added comments
That means you get punctuation patrol :-P
Check the semicolons, check the braces
Hey, I hear that in some companies they call this teamwork methodology
"extreme-programming"  We're buzzword compliant!

HTH
(Danm... I'm such a code monkey)

-- 
Never forget the halloween documents.
http://www.opensource.org/halloween/
""" Where will Microsoft try to drag you today?
    Do you really want to go there?"""



From rkern at ucsd.edu  Tue Jan 20 00:35:17 2004
From: rkern at ucsd.edu (Robert Kern)
Date: Tue, 20 Jan 2004 05:35:17 GMT
Subject: efficent test for array with only one value?
In-Reply-To: <25mud1-s1m.ln1@jowls.lairds.org>
References: <00ird1-dmd.ln1@jowls.lairds.org>
	<PJYOb.82151$C87.70674@twister.socal.rr.com>
	<25mud1-s1m.ln1@jowls.lairds.org>
Message-ID: <p63Pb.84084$C87.13614@twister.socal.rr.com>

Kyler Laird wrote:
> Robert Kern <rkern at ucsd.edu> writes:
> 
> 
>>>>>from Numeric import *
>>>>>a = ones((3,5))
>>>>>equal.reduce(a.flat)
>>
>>1
>>
>>>>>a[0,3] = 0
>>>>>equal.reduce(a.flat)
>>
>>0
>>
> 
>>Ufuncs are wonderful things.
> 
> 
> Yeah, but they also don't work for this.  First, I'm guessing that reduce
> will not stop immediately when equal encounters a False.  (It doesn't do
> "and".)
> 
> Also, it just plain doesn't work.
> 	>>> import Numeric
> 	>>> a = Numeric.zeros((3,5))
> 	>>> Numeric.equal.reduce(a.flat)
> 	0
> 	>>> Numeric.equal.reduce([0,0,0,0,0,0,1])
> 	1

Yeah, I'm sorry. I had a brainfart (one of several today, alas). The 
reduce method is completely the wrong thing to use since it uses the 
*result* of the last comparison as the first argument for the following 
comparison.

However, alltrue(a.flat == a.flat[0]) will work but won't short-circuit. 
Fast, though, if the array isn't huge.

> --kyler

-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter


From nhodgson at bigpond.net.au  Fri Jan 16 16:59:30 2004
From: nhodgson at bigpond.net.au (Neil Hodgson)
Date: Fri, 16 Jan 2004 21:59:30 GMT
Subject: Retrive unicode keys from the registry
References: <brp3bzwj.fsf@python.net>
	<KSXNb.15179$Wa.2061@news-server.bigpond.net.au>
	<1xpzaa8i.fsf@python.net>
Message-ID: <69ZNb.15222$Wa.2798@news-server.bigpond.net.au>

Thomas Heller:

> In the actual use case I have, I'm quite sure that the subkeys are coded
> in latin-1:

   And you are also sure that your locale will always use a latin-1 code
page or another code page similar enough to work on your keys.

> But, assume that I wanted to provide a patch to Python (or implement in
> ctypes) so that QueryValue accepts unicode subkey names (I was
> astonished to find out that it does not).  How could this be done,
> hopefully portable between NT/2000/XP and 98, and assuming unicows.dll
> is not installed - so the wide version is not available on 98?

   This is somewhat unpleasant, requiring runtime conditional code. For the
Python standard library, in posixmodule.c, places where there is a need to
branch first check that the OS is capable of wide calls with
unicode_file_names(), then check if the argument is Unicode and if it is
then it calls the wide system API. While the wide APIs do not work on 9x,
they are present so the executable will still load.

   One limitation on the Unicode support in posixmodule is that it doesn't
try to detect and use MSLU on Windows 9x/Me.

> My understanding is that it's possible to convert any (for a certain
> definition of 'any) unicode string in a byte string (because the
> encoding for the byte string can be specified).

   Then you have to choose the encoding and switch the current locale to
that encoding as there is no encoding or locale parameter to RegQueryValue.
Values with characters from different languages may not be encodable into
any non-Unicode encoding.

   Neil




From elainejackson7355 at home.com  Sat Jan 31 01:17:18 2004
From: elainejackson7355 at home.com (Elaine Jackson)
Date: Sat, 31 Jan 2004 06:17:18 GMT
Subject: Safe to modify globals(), or not?
References: <6714766d.0401291559.45413e0d@posting.google.com>
	<mailman.1015.1075431531.12720.python-list@python.org>
	<bvedh2$7h7$1@news.service.uci.edu>
Message-ID: <OLHSb.335365$JQ1.59052@pd7tw1no>

Have you considered  " globals()[name] = i "  ?

"Josiah Carlson" <jcarlson at nospam.uci.edu> wrote in message
news:bvedh2$7h7$1 at news.service.uci.edu...
|
| >>Fair enough. However, is there anything wrong with modifying globals()
| >
| >
| > No.  "globals()['a'] = 3" is exactly the same as "a=3" executed at module
| > scope, outside of functions.  The purpose is to allow you to set a variable
| > whose name you do not know until runtime.  An example, as in your
| > application, is when the name comes from user input.
|
| I personally enjoy modifying globals() as it suits my needs.  Another
| statement that is quite useful is global.
|  >>> def set_global_k(i):
| ...     global k
| ...     k = i
| ...
|  >>> set_global_k(5)
|  >>> k
| 5
|  >>> set_global_k(6)
|  >>> k
| 6
|  >>>
|
| Really only useful for when you know the name of the variable before
| runtime, but then again, one could always:
|  >>> def set_global_name(i, name):
| ...     exec('global %s;%s = i'%(name, name))
| ...
|  >>> set_global_name(10, 'l')
|  >>> l
| 10
|
|
| MMM, global manipulation.  Now if only there was a python function for
| global dominance, though perhaps globals().clear() is sufficient.
| Mua-hah-hah.
|
|   - Josiah




From stevewilliams at wwc.com  Fri Jan  9 22:10:12 2004
From: stevewilliams at wwc.com (Steve Williams)
Date: Sat, 10 Jan 2004 03:10:12 GMT
Subject: Databases: Which one's right for me?
In-Reply-To: <4378fa6f.0401091717.1ae63541@posting.google.com>
References: <4378fa6f.0401091717.1ae63541@posting.google.com>
Message-ID: <o2KLb.514$et1.510@nwrddc03.gnilink.net>

Marc wrote:
> Hi all,
> 
[snip]

> Basically I need a db that will travel with my executable script and
> faithfully store and edit the data needed in that script. People using
> this script will need to be stand alone users. Having a client/server
> arrangement is not possible over a network.
> 
> Also, installing some type of db engine outside of Python is also not
> possible.

[snip]

> Or, if there exists
> another solution other than the two I mentioned, please throw that out
> there because it's almost impossible to completely examine every
> possibility out there. All suggestions are helpful.
> 
> Thanks ahead of time,
> Marc

Firebird 1.5 has a nice stand-alone database capability I use for demos.

You don't have to install anything on the target machine, but it's not 
something that can be packed up in a python exe, as far as I know.  You 
have to have the Firebird database, its dll, config file and message 
file in the same directory as your Python program, but that's all.

Firebird, as a database, is worth a look.  I'd spend an hour evaluating 
it before using ACCESS and DAO.

You might run into deployment problems with ACCESS 2, 3, 4, 5, 7, 
2000/DAO on Windows 95, Windows 98, Windows NT, Windows XP, service 
packs 1-5, plus corruption/compaction headaches.  But that's just my 
experience.  "You have moved the mouse, please insert the ACCESS 
installation CD...".

If you just want some data persistency, use pickle.



From grey at despair.dmiyu.org  Tue Jan 20 19:38:12 2004
From: grey at despair.dmiyu.org (Steve Lamb)
Date: Wed, 21 Jan 2004 00:38:12 -0000
Subject: regular expression question
Message-ID: <slrnc0rifk.d0s.grey@dmiyu.org>

    Ok, this just seems convluted.

import re
line = 'match this'
foo = re.search(r'.*(this)', line)
foo.groups()[0]

    To me there seems there should be a way to return a group without having
to get the tuple and then slice it out from there.  However foo.group(0) will
return the entire string (only one argument given) and groups doesn't seem to
do anything significant with any entry I give it.  Am I missing something
obvious or is this the final solution?

-- 
         Steve C. Lamb         | I'm your priest, I'm your shrink, I'm your
       PGP Key: 8B6E99C5       | main connection to the switchboard of souls.
-------------------------------+---------------------------------------------


From rhughes at fastmail.fm  Thu Jan  1 16:12:43 2004
From: rhughes at fastmail.fm (Rob Hughes)
Date: 1 Jan 2004 13:12:43 -0800
Subject: Happy New Year in Python and other languages
Message-ID: <809f2610.0401011312.190dfb44@posting.google.com>

I saw Vadim Antonov's "Happy New Year in 4 languages" program 
(http://www.gnu.org/fun/jokes/happy-new-year.cfbC.html) and
thought I'd write a similar program using Python.  Here it is:

#include <stdio.h>
#define fi int main(void){printf("Happy New Year!\n");return(0);}
#/* This code has the same effect in Python, C, C++, and bash.
# Written by Rob Hughes <rhughes at fastmail.fm>, December 2003.
true=False
if true :
        then
        echo -e +"\bHappy New Year!"
else :
        print "Happy New Year!"; fi=0 #*/
fi


From seanl at chaosring.org  Sat Jan  3 04:44:34 2004
From: seanl at chaosring.org (Sean R. Lynch)
Date: Sat, 03 Jan 2004 01:44:34 -0800
Subject: Creating a capabilities-based restricted execution system
In-Reply-To: <7xznd58klr.fsf@ruckus.brouhaha.com>
References: <LmmdnUn4seDeGWuiXTWc-w@speakeasy.net>
	<7xznd58klr.fsf@ruckus.brouhaha.com>
Message-ID: <MGudndQhy9ieEmuiXTWc-w@speakeasy.net>

Paul Rubin wrote:

> Well, I have a dumb question.  Have you studied the security failures
> of rexec/Bastion and convinced yourself that they don't happen to your
> new scheme?

If you know of a location where the known shortcomings of rexec are 
documented, please let me know. So far I've only seen a couple examples 
and a lot of people saying "it's not secure so let's disable it."

My current methodology is to be very careful about adding any privileges 
beyond what RestrictedPython allows.

> You might look at the PyPy architecture doc if you haven't yet.
> Making a separate object space for restricted objects may fit PyPy's
> design quite naturally.

I have looked at PyPy. It's very interesting, but RestrictedPython is 
already written and in use in Zope.

I think I've figured out a way to use my name mangling scheme to make 
attributes only *writable* by code defined on a class from which an 
object descends: do writes through a name-mangled method, and have 
RestrictedPython output self._mangled_setattr(attr, val) for each 
attempted attribute assignment. This will basically make it impossible 
to have attributes that are writable from other classes, but I think 
it's probably a prerequisite for capabilities. Most other languages 
require attributes to be set via methods anyway, right?


From usenet_spam at janc.invalid  Mon Jan 26 22:10:00 2004
From: usenet_spam at janc.invalid (JanC)
Date: Tue, 27 Jan 2004 03:10:00 GMT
Subject: "Lecture Preparation" Discussions on Python
References: <1010a26.0401212246.3cac7d06@posting.google.com>
	<buomik$k34$1@panix1.panix.com>
	<38ec68a6.0401261727.1c0f835e@posting.google.com>
Message-ID: <Xns947D2A634EAFAJanC@213.119.4.35>

afriere at yahoo.co.uk (Asun Friere) schreef:

>> While I'm generally interested in such discussions, I won't be
>> participating because I hate web boards.  I vastly prefer netnews, with
>> grudging use of e-mail lists.
> 
> Nice for those who can get it.  The (educational) institution where I
> work have, in their wisdom, decided not to make netnews available, so
> I have to access even this newsgroup via a web board (GoogleGroups).

You don't *have* to...

Register an account at <http://individual.net/> and you have access to a 
very good news server.  It's a free service from a German government-funded 
research institute.

-- 
JanC

"Be strict when sending and tolerant when receiving."
RFC 1958 - Architectural Principles of the Internet - section 3.9


From deanm at uniplus.hr  Wed Jan 28 10:50:02 2004
From: deanm at uniplus.hr (Dean Marodi)
Date: Wed, 28 Jan 2004 16:50:02 +0100
Subject: Crystal Reports Viewer in wxPython
Message-ID: <bv8lat$gl3$1@ls219.htnet.hr>

Hi!

I want to use Crystal Reports Viewer with wxPython.

Can anyone help (example)?

Thanks,
Dean



From jjl at pobox.com  Tue Jan 13 13:19:25 2004
From: jjl at pobox.com (John J. Lee)
Date: 13 Jan 2004 18:19:25 +0000
Subject: Why learn Python ??
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<slrnc07r8m.36l.davecook@localhost.localdomain>
Message-ID: <87u12z90eq.fsf@pobox.com>

"David M. Cook" <davecook at nowhere.net> writes:

> In article <40029dad$0$28706$a729d347 at news.telepac.pt>, Bicho Verde wrote:
[...]
> You could casually pick up enough Python to be useful in a week or so of
> evenings.  
> 
> Perl is not much harder,

It *seems* so when you first learn it...

> but has a lot of "gotchas".

... and they never end!  Ilya Zakharevich (a "Perl God"):

http://www.google.com/groups?threadm=8h8scu%245h2%241%40charm.magnus.acs.ohio-state.edu

In article <8f498v$751$1 at charm.magnus.acs.ohio-state.edu>,
  ilya at math.ohio-state.edu (Ilya Zakharevich) wrote:
[...]
> Let me reiterate my current opinion on the topic: the reason for my
> puzzlement (and your trouble) is the difference between Perl as a
> scripting language and Perl as a programming language.  Perl is
> absolutely fine as a scripting language.  Perl is pretty unusable as a
> programming language.
[...]

I'm not sure I'd go quite as far as that, but it's not a million miles
from the truth.  Why saddle yourself with the costs of Perl when
Python demonstrates there are no significant associated benefits?
(I'm talking about "programming" not "scripting" here, using Ilya's
language, though I'd argue Python is just as good for scripting as
Perl)


John


From paul at prescod.net  Thu Jan 29 22:22:46 2004
From: paul at prescod.net (Paul Prescod)
Date: Thu, 29 Jan 2004 19:22:46 -0800
Subject: Python vs. Io
In-Reply-To: <711c7390.0401291301.3f95794@posting.google.com>
References: <711c7390.0401291301.3f95794@posting.google.com>
Message-ID: <4019CE06.7000908@prescod.net>

Daniel Ehrenberg wrote:

> Io (www.iolanguage.com) is a new programming language that's purely
> object-oriented (but with prototypes), has a powerful concurrency
> mechanism via actors, and uses an extremely  flexible syntax because
> all code is a modifiable message tree.

I long to live in a world where Python is considered a crufty incumbent 
legacy language that is forced on unwilling programmers by Pointy Haired 
Bosses. First, it would mean that Python has vanquished languages that 
programmers like less. Second, it would mean that the up-and-coming 
languages are so unbelievably cool and elegant that they make Python 
look like a lumbering dinosaur.

Thanks for reminding me that that that day was once unfathomably far in 
the future and now seems almost around the corner!

But when I look closer at IO it seems to me that the day is not as near 
as I hope. If you wish to hasten I urge you to:

  * finish the IO tutorial
  * distribute windows binaries of IO
  * make IO compilers to C and Java available
  * make bindings to popular windowing toolkits
  * make bindings to Java, .NET, COM, SOAP, XML-RPC etc.
  * use IO in a production context so that the rest of us can have faith 
in its stability
  * implement MySQL and Oracle bindings
  * publish some books on IO
  * point me to some documentation on how to launch and kill processes in IO

If this were all done tomorrow I might be tempted to jump over to IO but 
I would be amazed if it were all done even two years from now.

Also, an observation: IO's syntactic simplicity looks to me to be both a 
blessing and a curse.

  Paul Prescod





From eric.brunel at N0SP4M.com  Fri Jan 16 10:07:38 2004
From: eric.brunel at N0SP4M.com (Eric Brunel)
Date: Fri, 16 Jan 2004 16:07:38 +0100
Subject: Tkinter: modal ok in windows, but not in Linux
References: <NWkNb.2858$fU.1773@fe2.columbus.rr.com>
	<a7a67196.0401160353.5f7d4ae2@posting.google.com>
Message-ID: <bu8u8f$45n$1@news-reader1.wanadoo.fr>

klappnase wrote:
> DoubleM <mmoum at woh.rr.com> wrote in message news:<NWkNb.2858$fU.1773 at fe2.columbus.rr.com>...
> 
>>Hi,
>>
>>I'm running Python2.3.3c1 on Mandrake 9.1
>>
>>The following code is designed to bring up a window with a button labeled
>>"popup".  Clicking on the popup buttons triggers a secondary window with a
>>button labeled "ok".  The second window is supposed to be modal - it should
>>not be possible to reset the focus back to the first window or close the
>>first window without first closing the second.  The program works just fine
>>in Windows XP home, but in Linux I can close the first window while the
>>second one is still active.
>>
>>This seems to be a bug, or am I doing something wrong.  I searched google
>>for Tkinter Linux modal, but found nothing relevant.
>>
>>Thanks for your help.
>>
>>Here's the code, copied and pasted from IDLE.
>>
>>#############################
>>from Tkinter import *
>>
>>makemodal = 1
>>
>>def dialog():
>>    win = Toplevel()
>>    Label(win, text = "Secondary").pack()
>>    Button(win, text = "Ok", command = win.destroy).pack()
>>    if makemodal:
>>        win.focus_set()
>>        win.grab_set()
>>        win.wait_window()
>>    print "dialog exit"
>>
>>root = Tk()
>>Button(root, text = 'popup', command = dialog).pack()
>>root.mainloop()
>>#################################
>>
>>Mike
>>mmoum-xxxspam.woh.rr.com
> 
> 
> Hi Mike,
> 
> I guess you should use
> 
>     root.wait_window(win)
> 
> instead of
>  
>     win.wait_window()

It is indeed better, and so is doing a:

win.transient(root)

to avoid being able to put the main window on top of the dialog.

This won't however solve the OP's problem, which is that the main window can 
still be closed when the second window is running.

We've had the same problem, and I finally ended up thinking this problem's is 
not Python's fault, nor Tkinter's one, nor even tk's one: with X11, the controls 
on the window frame are actually managed not by the client application (from the 
X11 server point of view), but by the window manager. If the window manager 
decides to ignore the grab set on one of your windows and to continue to treat 
events for the other windows, you're stuck. The only thing you can do is 
treating the window deletion event to explicitely ignore it via a 
root.protocol('WM_DELETE_WINDOW', ...). There may be a way of doing it 
automatically at tk's level, but it would certainly be a big work, not to 
mention that there may be some window managers that *do* take the grab_set into 
account, and so where this work would be unnecessary.

There are other issues due to the window manager on various platforms; for 
example, the CDE window manager dtwm used on Sun's apparently can't make a 
window always stay on top of another. So dialogs on Sun's can always be put 
behind by clicking on another window of your application, which is really annoying.

All of the above is only my analysis of the problem; if anybody can confirm or 
prove me wrong, I'll be happy to learn something :-). But since tk is just a 
layer on "native" widgets for all platforms, you may always get behaviour 
differences across platforms for such things. I suppose other toolkits using the 
same principles (e.g. wxWindows) may have the same problems.

HTH
-- 
- Eric Brunel <eric dot brunel at pragmadev dot com> -
PragmaDev : Real Time Software Development Tools - http://www.pragmadev.com



From dsarrazinNOSPAMPLEASE at cyberus.ca  Sun Jan 11 20:18:57 2004
From: dsarrazinNOSPAMPLEASE at cyberus.ca (Denis Sarrazin)
Date: Sun, 11 Jan 2004 20:18:57 -0500
Subject: Division oddity
References: <ssn3009029rrug3l8dk1pn06tqd019ucld@4ax.com>
Message-ID: <7at3005sjtd6clgfm6e7v1gq83ohlrc2td@4ax.com>

Try 1.0/2 instead of 1/2. Note that when I do eval("1/2") I get 0 not
0.5

-Denis

Le Sun, 11 Jan 2004 23:45:48 +0000, Tim Rowe
<tim at remove_if_not_spam.digitig.co.uk> a ?crit :

>If I do from __future__ import division then eval(1/2) gives me 0.5 as
>expected. But if I do print input("enter a sum: ") and enter 1/2 as
>the sum I get 0 as if I hadn't done the import.  I thought input was
>supposed to give the same behaviour as an eval on raw input -- why the
>difference here?



From pinard at iro.umontreal.ca  Thu Jan 22 12:03:58 2004
From: pinard at iro.umontreal.ca (=?iso-8859-1?Q?Fran=E7ois?= Pinard)
Date: Thu, 22 Jan 2004 12:03:58 -0500
Subject: What is object()
In-Reply-To: <20040122154420.6597.qmail@web61110.mail.yahoo.com>
References: <20040122154420.6597.qmail@web61110.mail.yahoo.com>
Message-ID: <20040122170358.GA19330@alcyon.progiciels-bpi.ca>

[Hameed Khan]

> and what are new style classes?.

   http://www.python.org/2.2.3/descrintro.html

is a good read on this subject.

-- 
Fran?ois Pinard   http://www.iro.umontreal.ca/~pinard



From usenet_spam at janc.invalid  Sun Jan 25 02:26:47 2004
From: usenet_spam at janc.invalid (JanC)
Date: Sun, 25 Jan 2004 07:26:47 GMT
Subject: pyMagick vs PIL
References: <8d3e714e.0401242204.38c9c0e@posting.google.com>
Message-ID: <Xns947B55EC59FCDJanC@213.119.4.35>

cappy2112 at yahoo.com (Tony C) schreef:

> I've used Image Magick before, and I'm happy with it.
> When I searched for Python extensions for Image Magick, I found an
> unsupported (an old) version of pyMagick.

There's also the PythonMagick bindings for GraphicsMagick:
<http://www.procoders.net/moinmoin/PythonMagick>

-- 
JanC

"Be strict when sending and tolerant when receiving."
RFC 1958 - Architectural Principles of the Internet - section 3.9


From cbh at newenglandhomes.net  Fri Jan 23 11:27:38 2004
From: cbh at newenglandhomes.net (CB Hamlyn)
Date: Fri, 23 Jan 2004 11:27:38 -0500
Subject: File Install Program Using Python?
Message-ID: <1012ij4idech2d6@corp.supernews.com>

Hello, I'm currently working on a Modification for the PC game Battlefield
1942.  I'm a pretty good VBA Programmer with some Foxpro under belt as well.
After reading a ton of stuff on-line I'm simply floored by everything Python
has to offer.

Anyway, I want to create an installation program that takes a folder and all
it's sub-folders and copies them from a compressed form into the proper
directory.  Basically a simplified version InstallSheild or whatever.

I assume Python is capable of such a feat and I'm wondering if anyone can
spin me around, point me in the right direction and shove me toward my goal.

Any help would be appreciated.

Thanks
CB Hamlyn




From crescent_au at yahoo.com  Tue Jan 27 21:18:39 2004
From: crescent_au at yahoo.com (Ben)
Date: 27 Jan 2004 18:18:39 -0800
Subject: python in dreamweaver
Message-ID: <d99e1341.0401271818.625d5ef2@posting.google.com>

Hi all,

Is it possible to design my web site in Dreamweaver and add python
codes in it later??

Thanx
Ben


From jcarlson at uci.edu  Wed Jan 21 16:17:00 2004
From: jcarlson at uci.edu (Josiah Carlson)
Date: Wed, 21 Jan 2004 13:17:00 -0800
Subject: Accessing a shared generator from multiple threads.
References: <7934d084.0401152058.164a240c@posting.google.com>
	<40083eac$0$321$e4fe514c@news.xs4all.nl>
	<mailman.446.1074283391.12720.python-list@python.org>
	<40086C6E.8536542C@hotmail.com>
	<40098f12$0$320$e4fe514c@news.xs4all.nl>
	<400AB936.BA1D9D73@hotmail.com>
	<7934d084.0401181805.71029c2f@posting.google.com>
	<400EE6B5.27C6B694@hotmail.com>
Message-ID: <20040121131300.D8E9.JCARLSON@uci.edu>


Even easier:

Q = Queue.Queue()
Q.put(gen)
def thread():
    a = Q.get()
    use = a.next()
    Q.put(a)
    #do whatever you need

Of course you could just as easily use a single lock and a class:

class lockedgen:
    def __init__(self, gen):
        self.g = gen
        self.l = threading.Lock()
    def get(self):
        self.l.acquire()
        a = self.g.next()
        self.l.release()
        return a

generator = lockedgen(gen)
def thread():
    use = generator.get()
    #do what you need


 - Josiah


From viruswall at hypovereinsbank.de  Thu Jan 29 09:56:04 2004
From: viruswall at hypovereinsbank.de (viruswall at hypovereinsbank.de)
Date: Thu, 29 Jan 2004 14:56:04 -0000
Subject: Virus Alert
Message-ID: <20040129145604.4A13F56389@mucmvw2.hypovereinsbank.de>

The mail message (file: feyz.zip) you sent to oliver.imbusch.extern at hvbsystems.com contained a virus.



From linda at gwmail.dtcc.cc.nc.us  Thu Jan 29 17:10:53 2004
From: linda at gwmail.dtcc.cc.nc.us (linda at gwmail.dtcc.cc.nc.us)
Date: Thu, 29 Jan 2004 17:10:53 -0500
Subject: hello
Message-ID: <200401292210.i0TMAqHM079091@mxzilla7.xs4all.nl>

The message contains Unicode characters and has been sent as a binary attachment.

-------------- next part --------------
A non-text attachment was scrubbed...
Name: message.zip
Type: application/octet-stream
Size: 0 bytes
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URL: <http://mail.python.org/pipermail/python-list/attachments/20040129/273fbcc1/attachment.obj>

From fahad_faridi at yahoo.com  Fri Jan  9 15:41:56 2004
From: fahad_faridi at yahoo.com (fahad)
Date: Fri, 09 Jan 2004 20:41:56 -0000
Subject: pycap installation problem
Message-ID: <btn3mk+8drm@eGroups.com>

Hi,
I'm trying to install pycap-0.1.6 using following commnad:
python setup.py build --compiler=mingw32
but it throws a lot of errors about missing files some of them is:

running build
running build_py
running build_ext
building 'pycap.protocol' extension
D:\cygwin\bin\gcc.exe -mno-cygwin -mdll -O -Wall -Ic:\Python23
\include -Ic:\Pyth
on23\PC -c src/protocol\ip.c -o build\temp.win32-2.3
\Release\src\protocol\ip.o
In file included from src/protocol/protocolmodule.h:7,
                 from src/protocol/ip.c:4:
src/protocol/arp.h:6:20: libnet.h: No such file or directory
In file included from src/protocol/protocolmodule.h:8,
                 from src/protocol/ip.c:4:
src/protocol/ethernet.h:5:20: libnet.h: No such file or directory
src/protocol/ethernet.h:6:24: sys/socket.h: No such file or directory
src/protocol/ethernet.h:7:24: netinet/in.h: No such file or directory
src/protocol/ethernet.h:8:23: arpa/inet.h: No such file or directory
src/protocol/ethernet.h:30:7: warning: no newline at end of file

Any idea?
Thanks.




From jjl at pobox.com  Wed Jan 14 21:37:32 2004
From: jjl at pobox.com (John J. Lee)
Date: 15 Jan 2004 02:37:32 +0000
Subject: I come not to bury C++, but to praise it...
References: <mailman.337.1074032524.12720.python-list@python.org>
	<qq5Nb.33037$6y6.742643@bgtnsc05-news.ops.worldnet.att.net>
Message-ID: <87wu7uq6mr.fsf@pobox.com>

"Andrew Koenig" <ark at acm.org> writes:

> "John Benson" <jsbenson at bensonsystems.com> wrote in message
> news:mailman.337.1074032524.12720.python-list at python.org...
> 
> > I got into Python because I took one look at C++ and saw all the
> > handwaving in the introductory O'Reilly book to the effect that
> > "everything looks sweet now, but wait until these snazzy little
> > features interact..." and then started casting around for another
> > road to OOP.
> 
> Perhaps you should cast around for a different C++ book while you're
> at it, too -- maybe the one you found isn't well suited to your
> particular learning style.

Andrew's own "Accelerated C++" is good (written with Barbara Moo). :-)


John


From usenet at -OBFUSCATION-joefrancia.com  Wed Jan 28 16:21:42 2004
From: usenet at -OBFUSCATION-joefrancia.com (Joe Francia)
Date: Wed, 28 Jan 2004 21:21:42 GMT
Subject: executing an external app
In-Reply-To: <Pine.GSO.4.58.0401281558280.26750@denali.ccs.neu.edu>
References: <Pine.GSO.4.58.0401281558280.26750@denali.ccs.neu.edu>
Message-ID: <GJVRb.5895738$be.962461@news.easynews.com>

Joseph Krauze wrote:
> Hi all,
> 
> I have a simple question which I cannot solve (relatively new to Python).
> I want to write a script that executes an application on the go.  I looked
> into the exec*e() calls but the problem there is that they do not return.
> I also looked into execfile() but here the PATH is not taken into account
> and I couldn't figure out to pass the file that's executed arguments.
> 
> So, is there a simple way to execute an external app?
> i.e. execvpe('cat', 'myFile') - this will not return
> 
> Thanks,
> Joseph

Look at os.spawn* or os.popen*

-- 
Soraia: http://www.soraia.com


From mhammond at skippinet.com.au  Mon Jan 26 17:54:57 2004
From: mhammond at skippinet.com.au (Mark Hammond)
Date: Tue, 27 Jan 2004 09:54:57 +1100
Subject: -- Pythonic control of Windows GUI application: tabs and
	listviews
In-Reply-To: <4b3b1124.0401251706.6cf67f27@posting.google.com>
References: <4b3b1124.0401251706.6cf67f27@posting.google.com>
Message-ID: <bv45s6$2bd6$1@arachne.labyrinth.net.au>

zapazap wrote:

> For the "List-View" and "Tab" controls then, I expected to find the
> constants
> 
>     win32con.LVM_GETCHECK       
>     win32con.TCM_GETITEMCOUNT   

FYI, A good source of sample code for working with tree-view controls 
can be found in the SpamBayes project, specifically:
http://cvs.sourceforge.net/viewcvs.py/spambayes/spambayes/Outlook2000/dialogs/FolderSelector.py?view=markup

Working with these win32gui structures is a complete PITA (as it needs 
to be done via the 'struct' module) - I'd like to integrate support for 
ctypes structures to make this more readable.  In fact, I'd love to see 
ctypes structure support as a standard library module, but that is for 
another thread in a another forum <wink>

Mark



From none at none.com  Wed Jan 14 14:34:48 2004
From: none at none.com (Derek)
Date: Wed, 14 Jan 2004 14:34:48 -0500
Subject: Printing to console (No Scroll)
References: <mailman.365.1074103229.12720.python-list@python.org>
	<bu41k5$4in$00$2@news.t-online.com>
	<mailman.366.1074106671.12720.python-list@python.org>
	<bu456a$89s$02$1@news.t-online.com>
Message-ID: <bu45kp$d99m3$1@ID-46268.news.uni-berlin.de>

"Diez B. Roggisch" wrote
> > Any alternatives to ncurses? It seems like a overkill for this...
>
> Maybe you can use sys.stdout.write in conjunction with control-
> codes for moving back the cursor to column one. But you'll have
> to lookup these for yourself :)

I think \r is the control code (at least if you want to go back to the
start of the line):

import time, sys
for second in range(10):
     time.sleep(1)
     sys.stdout.write(`10-second` + " seconds \r")
     sys.stdout.flush()




From rmkrauter at yahoo.com  Sat Jan 24 23:18:21 2004
From: rmkrauter at yahoo.com (Rich Krauter)
Date: Sat, 24 Jan 2004 23:18:21 -0500
Subject: Newbie Nested Function Problem
In-Reply-To: <9%GQb.77000$Su5.22817@twister.nyroc.rr.com>
References: <O4GQb.12838$Tk3.10642@twister.nyroc.rr.com>
	<52d610h685a613ua1tk5k8f11cv1d61q0b@4ax.com>
	<9%GQb.77000$Su5.22817@twister.nyroc.rr.com>
Message-ID: <1075004300.4567.36.camel@vaio>

I should have suggested a 'fix' before: change all the "leave"s which
are referring to, or defining the function "leave" to "leaver" or
something like that. Keep all program's references to the variable
"leave" unchanged. Then your program should work.

To clarify my previous reply, your problem is this:

leave = 'xqz'
leave()  

The leave() call is actually trying to call a string object, which is
not callable. 
So I wasn't quite right in what I told you in the previous post - the
leave() call is not trying to call the function xqz(), its trying to
call the string xqz.

Rich

On Sat, 2004-01-24 at 22:47, Brian Samek wrote:

> > Okay, ask_number doesn't do what you're saying.  It's asking for a number,
> > placed into variable number, and if it gets something out of range, prints
> > an error message.
> >
> > And then ends.  It doesn't either a) repeat until it gets a valid number
> > or b) do anything with the number it gets, like pass it back to the caller
> > in a return statement, i.e.:
> >
> 
> It does repeat if it doesn't get a valid number.  The function calls itself
> after printing an error mesage.  For some reason the original message
> formatted itself differently when I pasted it into my mail program.  The
> line just before the first else statement should be indented to the same
> level as the line before it so it reads:
> 
> def ask_number():
>     number = input("Please enter a number.\n")
>     if number > 500 or number - int(number) != 0 or number < 1:
>         print "Input positive integers less then 501 only, please."
>         ask_number()
>     else:
> 
> 
> 
> >   return number
> >
> > > ask_number()
> >
> > Okay, you invoked ask_number, but didn't even try to get anything from it.
> > Normally, this would read something like:
> >
> > number_in = asknumber()
> >
> 
> What do you mean by I "didn't even try to get anything from it."  I get a
> variable called "number" from it from which the countdown(number) function
> counts down.
> 
> > >    else:
> >
> > Um.. it looks like you're inadvertably making this a deeply recursive
> > call, probably something you want to stay away from until you have regular
> > stuff down pat.
> 
> I don't understand what you're saying.  I designed the program as three
> functions nested within each other.  Are you saying I should be designing it
> differently?  I made it a series of nested functions because, for example, I
> needed to use the "number" variable from ask_number before it was destroyed.
> When a function ends, any variables it has created are destroyed.
> 
> Thanks,
> 
> Brian
> 
-------------- next part --------------
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From tassilo.parseval at rwth-aachen.de  Tue Jan 27 02:23:38 2004
From: tassilo.parseval at rwth-aachen.de (Tassilo v. Parseval)
Date: 27 Jan 2004 07:23:38 GMT
Subject: perl bug File::Basename and Perl's nature
References: <7fe97cc4.0401242131.22acf485@posting.google.com>
	<40136b6d@news.victoria.tc.ca>
	<7fe97cc4.0401260943.2442ba4e@posting.google.com>
	<bv3mga$leu$1@canopus.cc.umanitoba.ca>
	<7fe97cc4.0401261904.4880149a@posting.google.com>
Message-ID: <bv53lq$3cc$1@nets3.rz.RWTH-Aachen.DE>

[ F'up set ]

Also sprach Xah Lee:

> a correction to my previous post.
> 
> In my previous post i said one of the stupidity of Perl's
> File::Basename module is that it requires user to tell it OS type.
> This is incorrect.

You also said that the suffix list would be required.

This is also incorrect.

Tassilo
-- 
$_=q#",}])!JAPH!qq(tsuJ[{@"tnirp}3..0}_$;//::niam/s~=)]3[))_$-3(rellac(=_$({
pam{rekcahbus})(rekcah{lrePbus})(lreP{rehtonabus})!JAPH!qq(rehtona{tsuJbus#;
$_=reverse,s+(?<=sub).+q#q!'"qq.\t$&."'!#+sexisexiixesixeseg;y~\n~~dddd;eval


From ANTIGEN_EMAILWA1 at click2learn.com  Tue Jan 27 20:32:48 2004
From: ANTIGEN_EMAILWA1 at click2learn.com (ANTIGEN_EMAILWA1)
Date: Tue, 27 Jan 2004 17:32:48 -0800
Subject: Antigen found VIRUS= W32/MyDoom-A (Sophos,CA(InoculateIT)) worm
Message-ID: <9AD24984FA80A847936D467D79B771190178BC86@emailwa1.corp.click2learn.com>

Antigen for Exchange found document.zip->document.txt
.pif infected with VIRUS= W32/MyDoom-A (Sophos,CA(InoculateIT)) worm.
The message is currently Purged.  The message, "test", was
sent from python-list at python.org and was discovered in IMC Queues\Inbound
located at asymetrix/Bellevue/EMAILWA1.



From newsreply at transfertech.de  Wed Jan 14 11:14:50 2004
From: newsreply at transfertech.de (Axel Mittendorf)
Date: Wed, 14 Jan 2004 17:14:50 +0100
Subject: PyQT: qt.qApp
Message-ID: <bu3pph$qma$01$1@news.t-online.com>

Hello,
in my application I want to subclass qt.QApplication and
use this subclass instead of QApplication for my gui. Some
of my modules are automatically generated by pyuic and
I am not allowed to change their source code. The problem
is these modules do "from qt import *" and use an object
called 'qApp' which seems to be an instance of qt.QApplication
and I want them to use my subclass (exactly its instance)
instead of 'qApp'. How can I solve this?

Can someone tell me what qt.qApp is and what it is used for?
(I'm using PyQT 3.6.)

TIA,
Axel




From deets_noospaam at web.de  Wed Jan 14 13:26:13 2004
From: deets_noospaam at web.de (Diez B. Roggisch)
Date: Wed, 14 Jan 2004 19:26:13 +0100
Subject: Printing to console (No Scroll)
References: <mailman.365.1074103229.12720.python-list@python.org>
Message-ID: <bu41k5$4in$00$2@news.t-online.com>

> How can I print to the console without having it scrolling to a new line
> for each print statement?
> I want to print a count down in the console, but for each count it scrolls
> the screen (of course).

Use ncurses.

Diez


From theller at python.net  Fri Jan 16 15:50:53 2004
From: theller at python.net (Thomas Heller)
Date: Fri, 16 Jan 2004 21:50:53 +0100
Subject: Retrive unicode keys from the registry
References: <brp3bzwj.fsf@python.net>
	<KSXNb.15179$Wa.2061@news-server.bigpond.net.au>
Message-ID: <1xpzaa8i.fsf@python.net>

"Neil Hodgson" <nhodgson at bigpond.net.au> writes:

> Thomas Heller:
>
>> def RegQueryValue(root, subkey):
>>     if isinstance(subkey, unicode):
>>         return _winreg.QueryValue(root, subkey.encode("mbcs"))
>>     return _winreg.QueryValue(root, subkey)
>>
>> Does this look ok?
>
>    It will fail for keys that can not be encoded in your current code page.
> That will not often be a problem but if you want to be safe then access to
> the wide version is needed.

In the actual use case I have, I'm quite sure that the subkeys are coded
in latin-1:

# -*- coding: latin-1 -*-
LOG_KEYS = [u"DSC-S Cs Gun Emitter [Ah]",
            u"Ga Gun Beam Defining Aperture [?Ah]"]

and in my tests it worked.
Even if I wrote this:

# -*- coding: latin-1 -*-
LOG_KEYS = ["DSC-S Cs Gun Emitter [Ah]",
            "Ga Gun Beam Defining Aperture [?Ah]"]

But, assume that I wanted to provide a patch to Python (or implement in
ctypes) so that QueryValue accepts unicode subkey names (I was
astonished to find out that it does not).  How could this be done,
hopefully portable between NT/2000/XP and 98, and assuming unicows.dll
is not installed - so the wide version is not available on 98?

My understanding is that it's possible to convert any (for a certain
definition of 'any) unicode string in a byte string (because the
encoding for the byte string can be specified), but that it's impossible
to convert a byte string into unicode unless the byte string's encoding
is known.

Maybe this only shows my un-understanding of unicode...

Thanks,

Thomas


From kylotan at hotmail.com  Sat Jan 31 19:50:27 2004
From: kylotan at hotmail.com (Kylotan)
Date: 31 Jan 2004 16:50:27 -0800
Subject: pythonwin woes
References: <a7c2c93c.0401301309.4e61c606@posting.google.com>
	<bveron$1h6n$1@arachne.labyrinth.net.au>
Message-ID: <153fa67.0401311650.13fb9088@posting.google.com>

Mark Hammond <mhammond at skippinet.com.au> wrote in message news:<bveron$1h6n$1 at arachne.labyrinth.net.au>...

> IDLE runs all programs in a new, external Python process, so never sees 
> this issue.  In lots of ways, I like the way Pythonwin does it - keeping 
> that state around can be very useful - eg, after the program has 
> terminated, you can still see the objects etc.

IDLE keeps the state around after program termination too, so that you
can query it from the command line. It just gets rid of it when you
execute the next program (or re-execute the current one).

-- 
Ben Sizer


From not at all.com  Wed Jan 14 05:42:01 2004
From: not at all.com (G.I.L)
Date: Wed, 14 Jan 2004 12:42:01 +0200
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
	<40047290$1@news.012.net.il>
	<bu29ea$ct54l$1@ID-207230.news.uni-berlin.de>
Message-ID: <40051cb3$1@news.012.net.il>

Brandon J. Van Every wrote:
> "G.I.L" <not at all.com> wrote in message
> news:40047290$1 at news.012.net.il...
>>
>> Brandon, why the fuck on Earth couldn't you spend that exact amount
>> of time doing what you did BEFORE posting and arguing with the
>> entire newsgroup?
>
> Hey GIL, you're here wasting time of your own free will.  Don't look
> to me to be the purveyor of your quality discourse.  To me this is
> just hours between implementing stuff.

Partially implementing stuff.

> Although actually, there's another agenda.  I know *someone* out
> there is going through the same shit I have / I am.  The posts are
> for their benefit, to give them warnings / inklings.

Are you applying to be a martyr, St. Brandon?

>> It
>> was an unbelievable waste of time, since you've managed to convice
>> (maybe still wrongfully) all the people that you are completely
>> clueless.
>
> Why, because I turned around a project in 3 weeks while having the
> flu half the time?

No, because you dumped the project because it was boring. This may kill any
credit you may have had with people.

> You try to do something big, you put your money on the line to do it,
> you fail or don't entirely succeed, you give postmortem, you lay all
> your cards out for others to examine... *then* I will worry about
> your opinion.

You state that you will follow only those who fail after putting their own
money on projects? BTW, there seems to be a hint of contradiction, since you
normally don't look at success the way other people do ($$$), but whenever
you say "failure", it's exactly what other people mean.

>> I see your point in many of the issues you raised. But the only
>> reason I don't compare myself to you, is that I have a shitload of
>> games to prove my point. I've never had a major failure, so I never
>> needed to use one to leverage my projects. All the things I learned
>> from, were simply bad habits, mostly coding habits. I constantly
>> evolve, in small steps, from one success to another. That's how it
>> should be. You do the math.
>
> Those who never taste failure are haughty.

..or just plain cautious.

g




From peter at engcorp.com  Thu Jan  8 10:20:51 2004
From: peter at engcorp.com (Peter Hansen)
Date: Thu, 08 Jan 2004 10:20:51 -0500
Subject: unicode keys in dicts
References: <20040108150835.7242ef01.jiba@tuxfamily.org>
Message-ID: <3FFD7553.4EFA8C59@engcorp.com>

Jiba wrote:
> 
> is the following behaviour normal :
> 
> >>> d = {"?" : 1}
> >>> d["?"]
> 1
> >>> d[u"?"]
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> KeyError: u'\xe9'
> 
> it seems that "?" and u"?" are not considered as the same key (in Python
> 2.3.3). Though they have the same hash code (returned by hash()).
> 
> And "e" and u"e" (non accentuated characters) are considered as the same
> !

Well, "e" and u"e" _are_ the same character, while the unicode that comes
from decoding the "?" representation is entirely dependent on which codec 
you use for the decoding.  It is only the same as u"?" when decoded using 
certain codecs, most likely.  ASCII is 7-bit only, so the "?" value is 
not legal in ASCII, which is likely your default encoding.

For example, try "?".decode('iso-8859-1') and you will probably get the 
unicode value you were expecting.

I'm not the best to answer this, but I would at least say that the above
behaviour is considered "normal", though it can be surprising to those
of us not expert in Unicode issues... 

-Peter


From jane.doe at acme.com  Fri Jan  9 18:09:04 2004
From: jane.doe at acme.com (Jane Doe)
Date: Sat, 10 Jan 2004 00:09:04 +0100
Subject: Twisted or Medusa or Zope
References: <425cc8d1.0401070808.14690325@posting.google.com>
	<y11Lb.1333$Mb5.23891@news2.e.nsc.no>
	<3FFD7159.55630AE0@engcorp.com> <6AlLb.134$hd.7718@news2.e.nsc.no>
	<3FFEB6D6.BF92551E@engcorp.com>
	<+vXesJAXsr$$EwJL@jessikat.fsnet.co.uk>
	<3FFEBE42.80962511@engcorp.com>
Message-ID: <h3duvvoc7k93ucntc7j5fo1q4hd7306je3@4ax.com>

On Fri, 09 Jan 2004 09:44:18 -0500, Peter Hansen <peter at engcorp.com>
wrote:
>I get at least a temporary "server not found" error when I try that name.

http://snakelets.sourceforge.org/

("We're Sorry. The SourceForge.net Website is currently down for
maintenance. We will be back shortly) :-)

JD.


From noah at noah.org  Tue Jan 27 13:50:53 2004
From: noah at noah.org (Noah)
Date: 27 Jan 2004 10:50:53 -0800
Subject: raw audio input on Windows
Message-ID: <c9d82136.0401271050.2c483c2a@posting.google.com>

I need to record raw 8-bit mono audio from a generic sound card on MS-Windows.
I need to do something like this:
    sound_device = open audio device
    buffer = sound_device.read ('1 second, 8 bit, mono, 8 KHz')
    process buffer

If possible I would also like to experiment with sampling the raw audio 
in my own loop. For example, something like this:
    open audio device
    while 1:
        read byte from audio device
        process byte
(I realize that Python is probably not ideal for this sort of DSP, but
I figure that it should handle 8KHz mono with no problem).

Does anyone have any experience with recording sound using the WIN32 API?
Can you point me in the right direction? 

The OSS stuff in Python looks ideal, but unfortunately that's
a UNIX only thing :-(
    http://www.python.org/doc/current/lib/module-ossaudiodev.html

Any hints are appreciated.

Yours,
Noah


From whisper at oz.net  Fri Jan  2 00:32:07 2004
From: whisper at oz.net (David LeBlanc)
Date: Thu, 1 Jan 2004 21:32:07 -0800
Subject: question: Python or Lua for rejuvenation of old PCs?
In-Reply-To: <8oKdneXkV7RcYGmiRVn-hQ@comcast.com>
Message-ID: <LAEHLEAOBBLKAALGAPAFKEFNCOAA.whisper@oz.net>

> "John Benson" <jsbenson at bensonsystems.com> wrote in message
> news:mailman.16.1072987285.12720.python-list at python.org...
> > I suppose that my question is best phrased as this: What is a
> comfortable
> > minimum RAM size that a PC needs to have to comfortably run
> modern Python
> > for non-memory-intensive applications (i.e. no big database crunching or
> > other thrashy stuff). I'm thinking about just polling sensors and
> actuating
> > control devices over RS-232/RS-485/LAN and doing some chitchat between
> the
> > nodes over the LAN. Based on the response, I'll draw the line between my
> Lua
> > machines and my Python machines.
>
> I did my first useful Python work with old DOS version on a 4 MB machine.
> Disk memory size and running RAM memory size are different issues.  I have
> read that Lua beats Python on minimal disk footprint but have no idea of
> running size.  On Windows, Python.exe is very small but does
> import several
> modules, though I believe it could be built to require less.
>
> Terry J. Reedy

python.exe is small - for 2.3.2 it's 21kb, but it immediately pulls in a
953kb python23.dll (which is cleverly "hidden" in c:\winnt\system32) and
also draws on a 3.6mb set of dlls in python/32/dll. Lua is 140kb.

I have seen discussion of Python being run on small x86 systems with 64mb of
ram and a 64mb CF card "disk". I think several of the Linux and BSD distros
for the Soekris router widgets will run Python, not to mention another
language that starts with "P" ;)

Dave LeBlanc
Seattle, WA USA




From raims at dot.com  Wed Jan  7 08:43:21 2004
From: raims at dot.com (Lawrence Oluyede)
Date: Wed, 07 Jan 2004 14:43:21 +0100
Subject: Why ' '.some_string is often used ?
References: <Xns94698C0955DE0stefninnospamyahoofr@213.228.0.4>
Message-ID: <87u137an7q.fsf@mobile.foo>

"St?phane Ninin" <stefnin.nospam at yahoo.fr> writes:

> def normalize_whitespace(text):
>     "Remove redundant whitespace from a string"
>     return ' '.join(text.split())
>
> Is there a reason to do instead of just returning join(text.split()) ?

join is a function of string module and it belongs also to
string object. So you can't do join() but you have to do

str = " "
str.join(text.split())

or

import string
string.join(text.split(), " ")

Take a look: http://python.org/doc/current/lib/module-string.html

-- 
Lawrence "Rhymes" Oluyede
http://loluyede.blogspot.com


From reply.in.the.newsgroup at my.address.is.invalid  Sun Jan 18 09:34:30 2004
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Sun, 18 Jan 2004 15:34:30 +0100
Subject: Using python for _large_ projects like IDE
References: <930ba99a.0401180625.5863acd4@posting.google.com>
Message-ID: <916l00d71koc9mkag3s0r7s2n06jair55c@4ax.com>

Sridhar R:
>I am a little experienced python programmer (2 months).  [...]
>I am planning (now in design stage) to write an IDE

I've never developed an IDE, but it wouldn't be my first attempt to write
an app. It's huge and complex.

I started with prime numbers, tic-tac-toe, towers of hanoi, traveling
sales man, merge sort, and little things like that :-)

>Are there any ways to forsee the performance critical parts?

Sure, no problem. Post the design please.

>Also, any suggestions on reducing memory usage of big applications
>written in python?

Only the obvious: don't keep more data alive than strictly necessary.

-- 
Ren? Pijlman


From amuys at shortech.com.au  Sun Jan 18 21:05:29 2004
From: amuys at shortech.com.au (Andrae Muys)
Date: 18 Jan 2004 18:05:29 -0800
Subject: Accessing a shared generator from multiple threads.
References: <7934d084.0401152058.164a240c@posting.google.com>
	<40083eac$0$321$e4fe514c@news.xs4all.nl>
	<mailman.446.1074283391.12720.python-list@python.org>
	<40086C6E.8536542C@hotmail.com>
	<40098f12$0$320$e4fe514c@news.xs4all.nl>
	<400AB936.BA1D9D73@hotmail.com>
Message-ID: <7934d084.0401181805.71029c2f@posting.google.com>

[Subject line changed to allow thread to be found more easily in
google-groups]

Alan Kennedy <alanmk at hotmail.com> wrote in message news:<400AB936.BA1D9D73 at hotmail.com>...
> [Alan Kennedy]
> >> I believe that the following definition of serialise will correct the
> >> problem (IFF I've understood the problem correctly :-)
> >>

It does look like the following version will work, I was too focused
on synchronising the underlying generator, and forgot that my code
also needed to be re-entrant.  Thanks for catching my mistake.

> >> #-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
> >> import time
> >> import thread
> >> import threading
> >>
> >> class serialise:
> >>   "Wrap a generator in an iterator for thread-safe access"
> >>
> >>   def __init__(self, gen):
> >>     self.lock = threading.Lock()
> >>     self.gen = gen
> >>
> >>   def __iter__(self):
> >>     return self
> >>
> >>   def next(self):
> >>     self.lock.acquire()
> >>     try:
> >>       return self.gen.next()
> >>     finally:
> >>       self.lock.release()
> 
> [Ype Kingma]
> > Looks like a candidate for inclusion in a standard library to me.
> 
> Well, maybe :-)
> 
> To be honest, I don't have the time to write test cases, docs and
> patches. So I think I'll just leave it for people to find in the
> Google Groups archives ...
> 

Andrae Muys


From jjl at pobox.com  Fri Jan 23 11:20:37 2004
From: jjl at pobox.com (John J. Lee)
Date: 23 Jan 2004 16:20:37 +0000
Subject: Help and optimization hints, anyone?
References: <pan.2004.01.23.10.41.31.93597@lignus.dk>
	<87d69a6e2j.fsf@pobox.com>
	<pan.2004.01.23.14.48.47.22980@lignus.dk>
Message-ID: <87vfn2bpre.fsf@pobox.com>

Kim Petersen <kim at lignus.dk> writes:
> Den Fri, 23 Jan 2004 12:32:04 +0000. skrev John J. Lee:
[...]
> > dict is also a bad name -- this is the name of the builtin dictionary
> > type, which you've just clobbered (in the local scope).
> 
> Hmmm - isn't it called __dict__ ?

No, __dict__ is an attribute of Python objects.  It's the dictionary
in which most Python objects keep their data:

>>> class foo:
...     def __init__(self):
...         self.blah = "stuff"
...
>>> f = foo()
>>> f.__dict__
{'blah': 'stuff'}


dict is the builtin name for the dictionary type:

>>> dict
<type 'dict'>
>>> dict({"foo": "bar", "spam": "eggs"})
{'foo': 'bar', 'spam': 'eggs'}
>>> dict([("foo", "bar"), ("spam", "eggs")])
{'foo': 'bar', 'spam': 'eggs'}

[...]
> > Haven't read much further, but it looks like you might be better off
> > using attribute access rather than indexing.  In 2.2, use properties.
> > Earlier, use __setattr__ / __getattr__ (make sure you read the docs).
> 
> this migrated from a regular dict which i had to drop because its
> not hashable as mentioned earlier - next step __(get|set)attr__.

dicts are deliberately not hashable, because they're mutable.  Are you
sure you want a dict as a dictionary key (assuming that's what you're
doing)?


John


From amy-g-art at cox.net  Fri Jan 23 18:04:06 2004
From: amy-g-art at cox.net (Amy G)
Date: Fri, 23 Jan 2004 15:04:06 -0800
Subject: Various strings to dates.
References: <4GfQb.16187$AA6.14368@fed1read03>
	<MFgQb.95539$6y6.1915432@bgtnsc05-news.ops.worldnet.att.net>
	<PRgQb.16209$AA6.9881@fed1read03>
	<K4ydna_ey7rvOIzdRVn-jw@comcast.com>
Message-ID: <CLhQb.16220$AA6.13778@fed1read03>

When I tried to do the make install I get the following error message:

warning: install: modules installed to '/usr/lib/python2.2/site-packages/',
which is not in Python's module search path (sys.path) -- you'll have to
change the search path yourself

How do I correct this.  Sorry for the newb question.



"Michael Spencer" <michael at telcopartners.com> wrote in message
news:K4ydna_ey7rvOIzdRVn-jw at comcast.com...
> "Amy G" <amy-g-art at cox.net> wrote in message
> news:PRgQb.16209$AA6.9881 at fed1read03...
> > No it won't.  Unfortunatly I don't necessarily have a comma delimited
date
> > string.  Thanks for the input though.
> >
> > The following three date strings is another example of the various date
> > formats I will encounter here.
> >
> > Thursday, 22 January 2004 03:15:06
> > Thursday, January 22, 2004, 03:15:06
> > 2004, Thursday, 22 January 03:15:06
> >
> > All of these are essentially the same date... just in various formats.
I
> > would like to parse through them and get a comparable format so that I
can
> > display them in chronological order.
> >
> >
> > "wes weston" <wweston at att.net> wrote in message
> > news:MFgQb.95539$6y6.1915432 at bgtnsc05-news.ops.worldnet.att.net...
> > > Amy,
> > >     I hope there is a better way but, if you go here:
> > >
> > > http://www.python.org/doc/current/lib/datetime-date.html
> > >
> > > The new datetime module may help. This and the time mod
> > > should get you where you want to go.
> > >
> > > list     = strdate.split(", ")
> > > daystr   = list[0]
> > > daynum   = int(list[1])
> > > monthstr = list[2]
> > > year     = int(list[3])
> > > #funct to get a month int is needed
> > >
> > > d = datetime.Date(y,m,d)
> > >
> > > wes
> > >
> > > ---------------------------------------
> > >
> > > Amy G wrote:
> > > > I have seen something about this beofore on this forum, but my
google
> > search
> > > > didn't come up with the answer I am looking for.
> > > >
> > > > I have a list of tuples.  Each tuple is in the following format:
> > > >
> > > > ("data", "moredata", "evenmoredata", "date string")
> > > >
> > > > The date string is my concern.  This is the date stamp from an
email.
> > > > The problem is that I have a whole bunch of variations when it comes
> to
> > the
> > > > format that the date string is in.  For example I could have the
> > following
> > > > two tuples:
> > > >
> > > > ("data", "moredata", "evenmoredata", "Fri, 23 Jan 2004 00:06:15")
> > > > ("data", "moredata", "evenmoredata", "Thursday, 22 January 2004
> > 03:15:06")
> > > >
> > > > I know there is some way to use the date string from each of these
to
> > get a
> > > > date usable by python, but I cannot figure it out.
> > > > I was trying to use time.strptime but have been unsuccesful thus
far.
> > > >
> > > > Any help is appreciated.
> > > >
> > > >
> > >
> >
> >
>
> This was asked and answered earlier today
>
> See: https://moin.conectiva.com.br/DateUtil
>
> >>> from dateutil.parser import parse
> >>> parse("Thursday, 22 January 2004 03:15:06")
> datetime.datetime(2004, 1, 22, 3, 15, 6)
> >>> parse("Thursday, January 22, 2004, 03:15:06")
> datetime.datetime(2004, 1, 22, 3, 15, 6)
> >>> parse("2004, Thursday, 22 January 03:15:06")
> datetime.datetime(2004, 1, 22, 3, 15, 6)
> >>>
>
>
>




From mike at odyne.com  Sun Jan 18 19:28:18 2004
From: mike at odyne.com (Mike)
Date: 18 Jan 2004 16:28:18 -0800
Subject: Printing variable names
References: <a6d1df44.0401181122.56f1f091@posting.google.com>
	<mailman.479.1074455535.12720.python-list@python.org>
Message-ID: <a6d1df44.0401181628.6d1e1f86@posting.google.com>

Thanks for the info.  That does clear up a few things for me.  

This is what I'm trying to accomplish:

Basically I have a list of pointers to functions (or whaterver it's called in 
Python).  Something like this:

commands = [func1, func2, ...funcN]

This is in a script that I use to test an embedded system through the comport.
I call the script with the command number (func1 etc...), which calls the
corresponding function, which sends a command to the embedded system.

I'd like to be able to call the script with --help and have it spit out
the list of commands (the names func1, func2 etc...).


Mike




Mark McEahern <mark at mceahern.com> wrote in message news:<mailman.479.1074455535.12720.python-list at python.org>...
> Mike wrote:
> 
> >mylist = [a, b, c]
> >
> >I want to print out the names of the variables in mylist (not the
> >values of a, b, and c).  How do I go about doing this.  Thanks.
> >
> >Mike
> >  
> >
> There's no simple answer to this.  Consider the fact that you can have 
> more than one name bound to any given mutable instance.  What if:
> 
>   a = range(10)
>   b = a
> 
> mylist = [a]
> 
> what name do you want printed for the first item in mylist--'a' or 'b'?
> 
> One idea is to use a dictionary instead.  Then:
> 
> for key, value in mydict.iteritems():
>     print '%(key)s = %(value)s' % locals()
> 
> I'm curious what problem you're trying to solve.
> 
> Cheers,
> 
> // m


From skip at pobox.com  Mon Jan 26 09:37:02 2004
From: skip at pobox.com (Skip Montanaro)
Date: Mon, 26 Jan 2004 08:37:02 -0600
Subject: unittest
In-Reply-To: <cthu12j9id5.fsf@lcpxdf.wm.lc.ehu.es>
References: <cthu12j9id5.fsf@lcpxdf.wm.lc.ehu.es>
Message-ID: <16405.9742.364184.703362@montanaro.dyndns.org>


    Zunbeltz> class KnowValues(unittest.TestCase):

    Zunbeltz>     KnownRotationMatrices = [
    Zunbeltz>         ((Rotational3Part([[-1,0,0],[0,1,0],[0,0,-1]])),
    Zunbeltz>         (1, -1, 2, matrix.vector([0,1,0])))
    Zunbeltz>         ]

    Zunbeltz>     def TestRotationalPartdeterminant(self):
    Zunbeltz>         """ RotationalPart. determinant with known values."""
    Zunbeltz>         for i in  self.KnownRotationMatrices:
    Zunbeltz>             det = i[0].determinant()
    Zunbeltz>             self.assertEqual(det,i[1][0])


    Zunbeltz> if __name__ == "__main__":
    Zunbeltz>    unittest.main()

    Zunbeltz> but when i run this scrip i get the following output

    ...

Try renaming your test case method "test_rotational_partdeterminant".

Skip




From randall at tnr.cc  Fri Jan  2 15:56:43 2004
From: randall at tnr.cc (Randall Smith)
Date: Fri, 02 Jan 2004 20:56:43 GMT
Subject: how to import a module dynamically
Message-ID: <fWkJb.29708$xU1.18377@fe1.texas.rr.com>

How do I import a module when given the module name as input?

Between __import__, imp, and rexec, I'm very lost.  What I want to do 
seems so simple, but I don't know the best way to do it.  How would I 
import a module into the current namespace using the equivalent of these 
2 methods:

import modname

and

from modname import *

where modname is validated input

Randall



From usenet at -OBFUSCATED-joefrancia.com  Thu Jan  8 16:41:31 2004
From: usenet at -OBFUSCATED-joefrancia.com (Joe Francia)
Date: Thu, 08 Jan 2004 21:41:31 GMT
Subject: Cheetah - Test suite failures
In-Reply-To: <btk7rt$7tq$1@nyytiset.pp.htv.fi>
References: <btk7rt$7tq$1@nyytiset.pp.htv.fi>
Message-ID: <f8kLb.5017838$Id.803326@news.easynews.com>

Timo Virkkala wrote:

> I tried to install Cheetah (0.9.15) and ran into trouble. When running 
> the test suite, I get 61 failures and 57 errors. Most of the errors are
> "ImportError: No module named temp", with some "TypeError: update() 
> takes exactly one argument (0 given)".
> 
> The full output of the test suite is at
> (URL: http://www.cs.helsinki.fi/u/tjvirkka/out.txt )
> 
> I'd hate to spend hours debugging this thing, so I thought to ask here 
> if someone has any ideas what's causing this..
> 
> -- 
> Timo Virkkala

You also may want to post this question to the Cheetah list:
http://lists.sourceforge.net/lists/listinfo/cheetahtemplate-discuss

If you don't want to join yet another mailing lists, you can access the 
Cheetah list in your newsreader by pointing it to news.gmane.org and 
subscribing to gmane.comp.python.cheetah.


From bwglitch at hotpop.com  Wed Jan 14 14:04:26 2004
From: bwglitch at hotpop.com (BW Glitch)
Date: Wed, 14 Jan 2004 14:04:26 -0500
Subject: Python used in Freedom Force
In-Reply-To: <mailman.345.1074054599.12720.python-list@python.org>
References: <mailman.345.1074054599.12720.python-list@python.org>
Message-ID: <bu409l$ddne0$1@ID-203388.news.uni-berlin.de>

Wayne Folta wrote:
> I don't know if it's been discussed since the game came out a while ago, 
> but I was looking through some temp files that were installed with the 
> game Freedom Force (a very fun game) and the scenarios are programmed in 
> Python! (This is on the Mac, but I assume it also used Python on the PC.)

Yes, it does.

> An example of the code is:
[snip]

Careful with that... I was also surprised. The mods written for FF are 
also in Python. It feels great that the game I like most uses Python. :D

-- 
Glitch

http://andres980.tripod.com/

Sow the seeds of fear and victory is yours.
         -- Iguanus (G1)


From dj00302003 at yahoo.com  Thu Jan 22 21:18:51 2004
From: dj00302003 at yahoo.com (Jay Davis)
Date: 22 Jan 2004 18:18:51 -0800
Subject: Urllib2 upgrade is breaking urlopen()
Message-ID: <1d17eeb7.0401221818.7d98672@posting.google.com>

We have a lot of simple code using 'urllib', that basically
just goes out and opens and read()'s some http url.  Very basic,
ten line scripts, and they work fine with urllib.

We want to use urllib2 for everything, though, but when we
do we get: 

page=urllib2.urlopen("http://www.something.com/whatever.php")
...
  File "/usr/lib/python2.3/urllib2.py", line 306, in _call_chain
    result = func(*args)
  File "/usr/lib/python2.3/urllib2.py", line 463, in http_error_302
    self.inf_msg + msg, headers, fp)
urllib2.HTTPError: HTTP Error 302: The HTTP server returned a redirect
error that would lead to an infinite loop.
The last 30x error message was:
Found


These redirect errors just don't happen with urrlib.urlopen(), and I
can
only find a few posts on deja that even mention this problem.  Is
there a known workaround?

Thanks,

J.D.


From gsmith at oxfam.org.uk  Wed Jan 28 07:29:54 2004
From: gsmith at oxfam.org.uk (NEWS)
Date: Wed, 28 Jan 2004 12:29:54 -0000
Subject: Distributing Python programs
Message-ID: <4017abb7$0$9394$ed9e5944@reading.news.pipex.net>

Can I install Python on a networked server and have any user run Python
programs without having to go through the 9Mb client install?

What are my options for distributing Python programs to my users?

Thankyou to anyone who can help.

Graham





From tim.golden at iname.com  Wed Jan 21 15:20:44 2004
From: tim.golden at iname.com (Tim Golden)
Date: Wed, 21 Jan 2004 20:20:44 +0000 (UTC)
Subject: CD Insert Notification in WinXP
References: <mailman.575.1074679049.12720.python-list@python.org>
Message-ID: <bummuq$ssq$1@hercules.btinternet.com>


"Tim Golden" <tim.golden at viacom-outdoor.co.uk> wrote in message
news:mailman.575.1074679049.12720.python-list at python.org...
> >Hi,
> >
> >I'm using Python 2.3 on a Win XP box, and I'm trying to find
> >if there's
> >a library of some sort that will give you a callback (or something
> >comparable) when a new disc is inserted into a CD Rom drive.
> >I've done a
> >little googling and nothing's come up, so I'm not holding my breath. :)
> >
>
> Initial response, prior to further investigation:
> [... snip PyGame suggestion ...]

OK. After further investigation, what you want to do is trap
the WM_DEVICECHANGED message. From a combination of Googling,
the following article:

http://www.undu.com/Articles/980221b.htm

and MSDN KB Q163503 (HOWTO: Getting Notification of CD-ROM Insertion
 or Removal)

and the oh-so-useful ctypes:

http://starship.python.net/crew/theller/ctypes/

and some example by Itamar Shtull-Trauring of using the win32gui

I've managed to cobble together the following working example.
I'm quite sure it could be improved by someone who knew what
he was talking about, but it does work. (At least on my laptop).

<code>

import win32api, win32con, win32gui
from ctypes import *

#
# Device change events (WM_DEVICECHANGE wParam)
#
DBT_DEVICEARRIVAL = 0x8000
DBT_DEVICEQUERYREMOVE = 0x8001
DBT_DEVICEQUERYREMOVEFAILED = 0x8002
DBT_DEVICEMOVEPENDING = 0x8003
DBT_DEVICEREMOVECOMPLETE = 0x8004
DBT_DEVICETYPESSPECIFIC = 0x8005
DBT_CONFIGCHANGED = 0x0018

#
# type of device in DEV_BROADCAST_HDR
#
DBT_DEVTYP_OEM = 0x00000000
DBT_DEVTYP_DEVNODE = 0x00000001
DBT_DEVTYP_VOLUME = 0x00000002
DBT_DEVTYPE_PORT = 0x00000003
DBT_DEVTYPE_NET = 0x00000004

#
# media types in DBT_DEVTYP_VOLUME
#
DBTF_MEDIA = 0x0001
DBTF_NET = 0x0002

WORD = c_ushort
DWORD = c_ulong

class DEV_BROADCAST_HDR (Structure):
  _fields_ = [
    ("dbch_size", DWORD),
    ("dbch_devicetype", DWORD),
    ("dbch_reserved", DWORD)
  ]

class DEV_BROADCAST_VOLUME (Structure):
  _fields_ = [
    ("dbcv_size", DWORD),
    ("dbcv_devicetype", DWORD),
    ("dbcv_reserved", DWORD),
    ("dbcv_unitmask", DWORD),
    ("dbcv_flags", WORD)
  ]

def drive_from_mask (mask):
  n_drive = 0
  while 1:
    if (mask & (2 ** n_drive)): return n_drive
    else: n_drive += 1

class Notification:

  def __init__(self):
    message_map = {
      win32con.WM_DEVICECHANGE : self.onDeviceChange
    }

    wc = win32gui.WNDCLASS ()
    hinst = wc.hInstance = win32api.GetModuleHandle (None)
    wc.lpszClassName = "DeviceChangeDemo"
    wc.style = win32con.CS_VREDRAW | win32con.CS_HREDRAW;
    wc.hCursor = win32gui.LoadCursor (0, win32con.IDC_ARROW)
    wc.hbrBackground = win32con.COLOR_WINDOW
    wc.lpfnWndProc = message_map
    classAtom = win32gui.RegisterClass (wc)
    style = win32con.WS_OVERLAPPED | win32con.WS_SYSMENU
    self.hwnd = win32gui.CreateWindow (
      classAtom,
      "Device Change Demo",
      style,
      0, 0,
      win32con.CW_USEDEFAULT, win32con.CW_USEDEFAULT,
      0, 0,
      hinst, None
    )

  def onDeviceChange (self, hwnd, msg, wparam, lparam):
    #
    # WM_DEVICECHANGE:
    #  wParam - type of change: arrival, removal etc.
    #  lParam - what's changed?
    #    if it's a volume then...
    #  lParam - what's changed more exactly
    #
    dev_broadcast_hdr = DEV_BROADCAST_HDR.from_address (lparam)

    if wparam == DBT_DEVICEARRIVAL:
      print "Something's arrived"

      if dev_broadcast_hdr.dbch_devicetype == DBT_DEVTYP_VOLUME:
        print "It's a volume!"

        dev_broadcast_volume = DEV_BROADCAST_VOLUME.from_address (lparam)
        if dev_broadcast_volume.dbcv_flags & DBTF_MEDIA:
          print "with some media"
          drive_letter = drive_from_mask
(dev_broadcast_volume.dbcv_unitmask)
          print "in drive", chr (ord ("A") + drive_letter)

    return 1

if __name__=='__main__':
  w = Notification ()
  win32gui.PumpMessages ()

</code>

TJG




From haynesc at rockefeller.edu  Thu Jan 22 17:03:36 2004
From: haynesc at rockefeller.edu (Chad Haynes)
Date: Thu, 22 Jan 2004 17:03:36 -0500
Subject: wxPython question
Message-ID: <5sKcnU3qx-sP1Y3dRTvaKA@news.rockefeller.edu>

Is there a way to change the background color of a wxCheckBox in 
wxPython?  Using the SetBackgroundColor function will change the 
background of any label attached to the checkbox, but I want to change 
the color of the actual box.

I thought about trying to draw a colored box behind the checkbox, but I 
am putting the checkbox over an image and I havent had much luck drawing 
on top of the image.

Any help would be greatly appreciated!

-Chad



From alan.gauld at btinternet.com  Fri Jan 16 15:12:50 2004
From: alan.gauld at btinternet.com (Alan Gauld)
Date: Fri, 16 Jan 2004 20:12:50 GMT
Subject: best book: aint no such thing, and encouragement for old coots
References: <mailman.409.1074191840.12720.python-list@python.org>
	<bu8j31$s4c$1@scotsman.ed.ac.uk>
	<pan.2004.01.16.11.58.58.634101@yahoo.com>
Message-ID: <40084500.1044866098@news.blueyonder.co.uk>

On Fri, 16 Jan 2004 12:00:27 GMT, Samuel Walters
<swalters_usenet at yahoo.com> wrote:

> http://mitpress.mit.edu/sicp/full-text/book/book.html
> 
> It's the major reason I'm learning scheme.
> I just don't stop hearing good things about this book.

Yep, and a good companion volume, also online is

How To Design Programs

http://www.htdp.org/2001-11-21/Book/

Which is a more hands on, day to day type scheme tutor but
emphasises all the same principles. It's less math oriented 
that SICP which might appeal to some.

But SICP is definitely the more "life changing" in impact.

Alan G.
Author of the Learn to Program website
http://www.freenetpages.co.uk/hp/alan.gauld


From maarten at remove_this_ws.tn.tudelft.nl  Tue Jan 20 07:43:02 2004
From: maarten at remove_this_ws.tn.tudelft.nl (Maarten van Reeuwijk)
Date: Tue, 20 Jan 2004 13:43:02 +0100
Subject: Looking for very simple general purpose tokenizer
References: <bug9ij$30k$1@news.tudelft.nl>
Message-ID: <buj7on$9bf$1@news.tudelft.nl>

I found a complication with the shlex module. When I execute the following
fragment you'll notice that doubles are split. Is there any way to avoid
numbers this?


source = """
 $NAMRUN
     Lz      =  0.15
     nu      =  1.08E-6
"""

import shlex
import StringIO

buf = StringIO.StringIO(source)
toker = shlex.shlex(buf)
toker.comments = ""
toker.whitespace = " \t\r"
print [tok for tok in toker]

Output:
['\n', '$', 'NAMRUN', '\n', 'Lz', '=', '0', '.', '15', '\n', 'nu', '=', '1',
'.', '08E', '-', '6', '\n']


-- 
===================================================================
Maarten van Reeuwijk                        Heat and Fluid Sciences
Phd student                             dept. of Multiscale Physics
www.ws.tn.tudelft.nl                 Delft University of Technology


From mhammond at skippinet.com.au  Sat Jan 10 17:31:28 2004
From: mhammond at skippinet.com.au (Mark Hammond)
Date: Sun, 11 Jan 2004 09:31:28 +1100
Subject: Multithreaded COM server problem...
In-Reply-To: <5a90009ufdd66okc8osajrn1a5kokp86mk@4ax.com>
References: <5a90009ufdd66okc8osajrn1a5kokp86mk@4ax.com>
Message-ID: <btpug4$1oag$1@arachne.labyrinth.net.au>

John Lull wrote:

> I'm writing a multithreaded COM server to manage a pool of hardware resources.
> All objects are designed to be thread-safe, and I've set sys.coinit_flags to
> COINIT_MULTITHREADED before importing pythoncom.

Note that this flag is effeectively ignored for the server.  Objects are 
created in the same "apartment" as their creator.  This, the code 
implementing your object need not specify this, but the code *creating* 
the object must.  This is what determines the appartment.

COM threading rules are complex, but "Python Programming on Win32" (1/2 
by me :) covers these rules in words I would have trouble finding again :)

Mark.



From rodrigob at elo.utfsm.cl  Mon Jan 19 09:41:58 2004
From: rodrigob at elo.utfsm.cl (Rodrigo Benenson)
Date: Mon, 19 Jan 2004 11:41:58 -0300
Subject: stack-like file object
Message-ID: <400be8f3_2@nova.entelchile.net>

Hi,
I need to implement a stack on a file.
The idea is to have a big list, and put part of his head on the disk. The
model of access to the file is like a stack (read in order only the tail,
write only at the tail).
How could I create this, knowing that I need to pickle arbritary objects ?

(to my eyes the problem is: how to pickle various objects in file and access
them as separate)

RodrigoB.





From nospam at nowhere.hu  Mon Jan 12 07:56:29 2004
From: nospam at nowhere.hu (Miklós)
Date: Mon, 12 Jan 2004 13:56:29 +0100
Subject: Why learn Python ??
References: <40029dad$0$28706$a729d347@news.telepac.pt>
Message-ID: <btvfd3$s9h$1@namru.matavnet.hu>

As for AI, I would choose Prolog any time over Lisp. ;)   I know either one
really but I had more fun with Prolog than with Lisp when playing with them.
You know the AI people are divided into two groups: 'the fuzzy' and 'the
tidy'.  (Dunno these are the orginal phrases in English..)
The former ones are people of practice and little theory, the latter ones
are people of theory and more theory which works in practice. ;)
The former ones like Lisp and the latter ones use Prolog.
Lisp is prefered in the USA, Prolog is preferred in Europe and Japan.

Anyway, my point is that Python is very neat for doing AI:
http://www.cs.berkeley.edu/~russell/aima.html

This is the best AI textbook I've seen so far and their  textbook code is
being put into Python...
Help them out.. ;)

Best,
  Mikl?s


Bicho Verde <bichoverde at sapo.pt> wrote in message
news:40029dad$0$28706$a729d347 at news.telepac.pt...
> I have now free time and money to do what I want :-)
>      I have some basic skills in programming (C, Pascal, Macromedia
>       Anyone would help me and give me some hints?
>
> -BichoVerde





From aahz at pythoncraft.com  Sat Jan 17 14:09:43 2004
From: aahz at pythoncraft.com (Aahz)
Date: 17 Jan 2004 14:09:43 -0500
Subject: Overriding operator delete in a Python extension
References: <bubnvd$7v1$1@pump1.york.ac.uk>
Message-ID: <buc19n$pju$1@panix3.panix.com>

In article <bubnvd$7v1$1 at pump1.york.ac.uk>,
Andrew Wilkinson  <ajw140NO at SPAM.york.ac.uk> wrote:
>
>I've written a C++ Python extension, and as part of it I override the
>operator new and operator delete functions to provide memory leak tracking
>from within the extension.
>
>When I use the code as part of a complete C++ program everything works
>perfectly, however when I compile it with my Python interface code the
>operator delete function is not called - the operator new function is
>called as normal however. I assume this is because the function is not
>linked correctly, but I'm at a loss for how to make the linker resolve the
>references in the .so file.
>
>Does anyone know a possible solution to my problem?

Use Boost.Python.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

A: No.
Q: Is top-posting okay?


From db3l at fitlinxx.com  Fri Jan 30 16:53:26 2004
From: db3l at fitlinxx.com (David Bolen)
Date: 30 Jan 2004 16:53:26 -0500
Subject: TCP server as a Windows service using Python?
References: <pan.2004.01.30.00.11.06.642734@spamfree.optushome.com.au>
Message-ID: <uad45qf1l.fsf@fitlinxx.com>

David Mitchell <djmitchell at spamfree.optushome.com.au> writes:

> I can't see how to let the service accept *either* an incoming TCP client
> connection *or* an e.g. "stop service" message.  If someone could point me
> to some sample code, I'd greatly appreciate it - Google hasn't been
> helpful.

NT Services generally run a dedicated thread to handle service control
messages - normally the application starts up and lets its main thread
handle that, and it starts a secondary thread to actually run the
application code.

It's been a while since I last used it, but if you are using the
service support from win32all then I believe it should handle it
automatically for you.  If you subclass from
win32serviceutil.ServiceFramework, then the Svc* control message calls
(such as SvcStop) should, I believe, arriving in a different thread
from your main execution. (*)

Thus, your client side processing only has to wait for the TCP
connection.  The stop service connection is handled in the service
message thread, which the framework will turn into the method call.

Now, you do have to figure out how you want to interrupt your TCP
client processing when you get such a stop message.  The demo with
win32all uses an event which it can wait on along with the pipes.  You
could do the same thing with sockets if you used native Windows
operations, but if you're using more portable Python stuff, I'd
probably just have a periodic timeout to your select to check a flag,
or even have an internal loopback socket that you write to to wake up
the select and then it can shut down.

-- David

(*) If for some reason this isn't the case, you can still architect
your service this way - just spin off a new thread at startup to
handle your TCP clients.


From python-list at cstork.org  Wed Jan 21 01:24:32 2004
From: python-list at cstork.org (Christian Stork)
Date: Tue, 20 Jan 2004 22:24:32 -0800
Subject: Weaver/Yarn Pattern in Python
Message-ID: <20040121062432.GA6158@ics.uci.edu>

Hello everybody,

I am using Python to prototype a compression algorithm for tree-shaped
data, e.g., XML data or abstract syntax trees.  I use a variant of the
visitor design pattern--called weaver/yarn pattern--in order to
traverse the tree that is being compressed or decompressed.  I do not
know of any other interesting application of the weaver/yarn pattern,
but it seems like a very suitable subject of study for different
implementation strategies.  Essentially, I am asking for input on my
design decisions.

First, let me give you a simple example of the traditional visitor
pattern.  The following diagram illustrates a depth-first traversal of
a mini tree by a visitor.  The basic idea is that the tree accepts a
visitor and helps it to do a kind of type-dispatch based on the kind
of nodes.


Tree data structure (nodes a,b,c of types A,B,C)

      a:A      
      / \      
     /   \     
   b:B   c:C   

           Nested calls
           ------------
Call location          Call stack

main:                  a.accept(v)         
   A:                     v.visitA(a)      
      V:                     b.accept(v)   
         B:                     v.visitB(b)
      V:                     c.accept(v)   
         C:                     v.visitC(c)


class A(Node):
    def accept(self, visitor):
        visitor.visitA(self)
class B(Node):
    def accept(self, visitor):
        visitor.visitB(self)
class C(Node):
    def accept(self, visitor):
        visitor.visitC(self)


class Visitor:
    "Perform specific tasks while visiting certain nodes"
    def visitA(self, a):
        for k in a.kids:
            k.accept(self)
    def visitB(self, b):
        pass
    def visitC(self, c):
        pass

The advantage of this ping-pong between the tree and visitor v is that
v encapsulates related processing instructions.  Several different
visitors can be maintained independently of each other and without
forcing changes to the tree node classes.  The tree nodes only need to
provide a node.accept(visitor) method.  Type-checking can ensure
the match between the visitor and the tree data structure.

Normally, visitors encapsulate different processing passes, which are
run one after the other, each time traversing the whole tree.  I have
implemented the compression of trees as several (sub)visitors c1..cN
even though they could have been implemented as one big visitor.
Besides the easy recombinability of visitors this has the added
advantage that I can use the same visitors for compression and
decompression where this is appropriate.

But now I have a problem when decompressing.  In order to run one
visitor after another the first one expects to traverse the whole
tree.  But this is impossible in case of a decompressor.  It lies in
the very nature of the application that the tree is being constructed
while the visitors work on it.  Conceptually the solution is easy.
The decompression subvisitors d1..dM have to process the partially
available tree upto the point of traversal where it is available.  At
each node execution has to iterate over the applicable code of d1..dM
in the given order.  This necessitates a decomposition of visitors
into something that we call yarns and these yarns are weaved by one
visitor, which we call the weaver.  Thus the name "Weaver/Yarn
Pattern" for this variation of the visitor pattern.

The following exemplifies my current implementation of the w/y pattern
for a recursive descent (ie depth-first traversal) visitor.  For each
(sub)visitor d1..dM the former d<i>.visitX(x) method is divided into
several y.weaveX_...() methods.  At entry and exit the weaver invokes
y.weaveX_First() and y.weaveX_Last().  Each descent into a child is
surrounded by y.weaveX_Before(kidno) and y.weaveX_After(kidno) method
calls.

class Yarn:
    # methods replacing visitA(..)
    def weaveA_First(self, a):
        pass
    def weaveA_Before(self, a, kidno):
        pass
    def weaveA_After(self, a, kidno):
        pass
    def weaveA_Last(self, a):
        pass
    # methods replacing visitB(..)
    def weaveB_First(self, a):
        pass
    def weaveB_Last(self, a):
        pass
    # methods replacing visitC(..)
    ...


class Weaver:
    "A special visitor which weaves yarns"
    def __init__(self, yarns):
        self.yarns = yarns
    def visitA(self, a):
        for y in self.yarns:
            y.weaveA_First(a)
        for i, k in enumerate(a.kids):
            for y in self.yarns:
                y.weaveA_Before(a, i)
            k.accept(self)
            for y in self.yarns:
                y.weaveA_After(a, i)
        for y in self.yarns:
            y.weaveA_First(a)
    def visitB(self, b):
        for y in self.yarns:
            y.weaveA_First(b)
        for y in self.yarns:
            y.weaveA_First(b)
    def visitC(self, b):
        ...

By now it should be obvious that the boilerplate for this approach
becomes quite extensive and it would be desirable to reduce it.  To
mitigate the problem I did three things:

- Automatically generate templates for yarn classes.  The actual code
  can be filled in.  Disadvantage: No convenient way to deal with
  changes to the tree data structure.

- The node.accept(weaver) methods are changed to call a "generic"
  weaver.weave(node) method (instead of weaver.visitX(node)), which
  hackishly constructs all the calls to the yarns by assembling the
  method names from the __class__.__name__ and one of "First", "Last",
  "Before", and "After".

This solution does pretty much what I want:

- Writing selected yarn methods allows me to express with little
  overhead /what/ code to execute /when/ in the weaving process.

- Once the weaver/yarn interaction machinery is set up correctly, the
  debugger points me to real code in case of bugs.  This is an
  advantage over approaches that create classes at runtime, e.g., use
  of metaclasses or the "new" module.

OTOH, I'm not perfectly happy with this solution since it's totally
"hackish".  For example, I have to use a function, hand-written
specifially for this purpose, in order to "type-check" the
correspondence of the tree types and the yarns.

Maybe Python is not the right language for an elegant solution and I
should look at more rigorously or differently typed languages, but I
thought it's worth presenting my case here and asking what other
python hackers think.  Maybe there is another more pythonic way to do
this?

I looked into several of python's features, but to no avail.
Iterators don't seem to play well with yarns (especially if you try to
thread objects thru the yarns to support synthesized/inherited
attributes a known from attribute grammars).  I also looked at
metaclasses in order to reduce the boilerplate but that did pay off
either.

There are certainly other languages and language concepts, which offer
interesting implementation alternatives:

- Dylan's generic functions seems to be a a good match for my problem,
  which allows me to get around the method name mangling in
  weaver.weave(node).  Anybody an idea for a nice emulation of generic
  functions in python? :)

- Lazy evaluation as provided by Haskell (or even Ocaml) seems to make
  the traveral by several visitors unnecessary, but I'm not yet
  convinced enough of this approach to start a full reimplementation.

- Systems for attribute grammar evaluation seem to address some of my
  general concerns, but I am afraid that they might constrain me too
  much.

If you're still reading this I'm impressed ;-) and I would be very
happy to hear what you think.

-Chris

-- 
Chris Stork   <>  Support eff.org!  <>   http://www.ics.uci.edu/~cstork/
OpenPGP fingerprint:  B08B 602C C806 C492 D069  021E 41F3 8C8D 50F9 CA2F



From 9974331 at cvm.qc.ca  Wed Jan 14 16:14:43 2004
From: 9974331 at cvm.qc.ca (Askari)
Date: 14 Jan 2004 13:14:43 -0800
Subject: CheckButton  -- modify "check state"
Message-ID: <104c369a.0401141314.5c64a727@posting.google.com>

Hi,
   How do for do a "select()" on a CheckButton in a menu (make with
add_checkbutton(....) )?
I can modify title, state, etc but not the "check state". :-(

Askari


From No.Spam.mc at No.Spam.mclaveau.No.Spam.com  Mon Jan 19 15:58:41 2004
From: No.Spam.mc at No.Spam.mclaveau.No.Spam.com (Michel Claveau/Hamster)
Date: Mon, 19 Jan 2004 21:58:41 +0100
Subject: interface to win job scheduler portable from win98 .. winXP /
	cmdline or COM ?
References: <400c134c$0$9745$9b622d9e@news.freenet.de>
Message-ID: <buhged$dcq$1@news-reader1.wanadoo.fr>

Hi !

The AT command, in NT, W2K or WXP, use the user "system", by default (with
some limits).
It's better to make an Python's script who do the job scheduler ; it's no
difficult.


* sorry for my bad english *


@-salutations
--
Michel Claveau
m?l : http://cerbermail.com/?6J1TthIa8B
site : http://mclaveau.com






From Tobias.Windeln at gmx.de  Fri Jan  9 06:39:48 2004
From: Tobias.Windeln at gmx.de (Tobias Windeln)
Date: Fri, 09 Jan 2004 12:39:48 +0100
Subject: Object-based inheritance in Python
Message-ID: <btm3u5$13so$1@f1node01.rhrz.uni-bonn.de>

Hi!

I'm looking for suggestions on object-based inheritance
in Python. Automatic forwarding (often called delegation)
in Python is easy:

def __getattr__(self, attr):
     return getattr(self.delegatee, attr)
def __setattr__(self, attr, value):
     return setattr(self.delegatee, attr, value)

Maybe there is a way to hand over self to the delegatee object.
So the next call on self in the delegatee object is send to the child 
object.

A small example:

class Child:
     def __init__(self, delegatee):
         self.__dict__['delegatee'] = delegatee

# TODO ... delegation/overriding mechanism ....

     def m(self):
	    self.m2(self)                	
     def m3(self):
            print("Child")

class Delegatee:
     def m2(self):
	    self.m3(self)                	
     def m3(self):
            print("Child")

#_______________________

 >>> c = Child(Delegatee())
 >>> c.m()
Child
 >>>

The call to m2() is forwarded to the Delegatee.
The call to m3() in m2() is redirected to Child and
the m3() Method in Child is called:
=====================================================
		 m2(child_self)
	child   -------------------->   delegatee
				    |
		<-------------------|
     	         m3(child_self)
=====================================================

This functionality would be helpfull in Patterns (Decorator, Strategy, etc.)

Do you have any suggestions on how to hand over self to the delegatee?
Since the first argument of every method in Python is self, the rest of 
the object-based inheritance works automatically!

I usually work with Java, where I implemented this functionality with 
enormous effort. When I saw Pythons reflective capabilities (__getattr__ 
etc.) I wondered if this is possible in an generic/easy way.


Thanks in advance
   Tobias



From just at xs4all.nl  Mon Jan  5 13:01:05 2004
From: just at xs4all.nl (Just)
Date: Mon, 05 Jan 2004 19:01:05 +0100
Subject: PRE-PEP: new Path class
References: <vvivefh35qjv9a@news.supernews.com>
	<just-CC8B2B.17325205012004@news1.news.xs4all.nl>
	<vvj881re348u0c@news.supernews.com>
Message-ID: <just-E6D705.19010505012004@news1.news.xs4all.nl>

In article <vvj881re348u0c at news.supernews.com>,
 "John Roth" <newsgroups at jhrothjr.com> wrote:

> > > 4) Should path expose an iterator for listdir(?)
> > >
> > > I don't see why not, as long as the path is to a
> > > directory.
> >
> > _An_ iterator, sure, but not __iter__. How about path.listdir()? :)
> > __iter__ could also iterate over the path elements, so it's ambiguous at
> > least.
> 
> I see what you're saying. I'd argue (softly) that iterating over
> the directory entries is the natural interpretation, though.

It's far too implicit to my taste; for one since it's a folder-only 
operation (and I don't see much merit in having separate classes for 
folder and file paths). Would you also be in favor of interating over 
file-paths meaning iterating over the lines in the file?

Just


From drfransch at netscape.net  Wed Jan  7 03:51:45 2004
From: drfransch at netscape.net (F. Schaefer)
Date: 7 Jan 2004 00:51:45 -0800
Subject: Code Objects / Variable Names
Message-ID: <f8dfa927.0401070051.39cded0c@posting.google.com>

PROBLEM: 

  How can you know what variables are involved in a code object. 

  It is not possible to execute the code object simply into a 
  dictionary and then watch the defined variables. This is 
  because these code objects only contain conditions, that 
  read out variables.

EXAMPLE: 

  For the following (compiled) condition 

          (door == "ajar"   and   alternator == "off") || time > 25

  I need to extract, that the variables 'door', 'alternator' and 'time'
  are involved.


Best Regards,

Frank Sch?fer.


From banderet at nagra.com  Thu Jan 15 11:05:30 2004
From: banderet at nagra.com (Gregoire Banderet)
Date: 15 Jan 2004 08:05:30 -0800
Subject: Embedded python (use of modules) on system w/o Python installed
Message-ID: <ded6cfa7.0401150805.214201da@posting.google.com>

Hi there,

I try to run a python script from a C program.
The script uses the re (regex) module.
The resulting executable must run on a system that has no lib and
python script module, i.e no re.py

How should I write my C program (I'd like to avoid any python file
installation on target system) ?
Now it is:
--------- C prg ----------
#include <python2.2/Python.h>
#define PYTHON_SCRIPT "test.py"

int main(int argc, char * argv[])
{
  FILE *fd = fopen(PYTHON_SCRIPT, "r");
  Py_Initialize();
  PyRun_SimpleFile(fd, PYTHON_SCRIPT);
  Py_Finalize();
  return 0;
}
----------------------------


---------- test.py ----------
import re

p = re.compile('(ab)*')
print p.match('ababababab').span()
------------------------------


But when I run pytest on the target system:
# ./pytest
'import site' failed; use -v for traceback
Traceback (most recent call last):
  File "test.py", line 1, in ?
    import re
ImportError: No module named re


From jcb at iteris.com  Fri Jan 16 01:57:55 2004
From: jcb at iteris.com (MetalOne)
Date: 15 Jan 2004 22:57:55 -0800
Subject: wxPython worries
References: <mailman.352.1074092092.12720.python-list@python.org>
Message-ID: <92c59a2c.0401152257.5b93167b@posting.google.com>

I have recently been trying to build some GUIs with wxWindows.  The
first problem that I ran across involved not being able to send and
event from a worker thread to the GUI thread and get the GUI thread to
process the event while the user had a menu pulled down.  I wrote a
bug report and this has since been fixed.  Tkinter has issues here
also.  There is no means for a worker thread to put an event in the
GUI thread.

The second problem that I have run across is that tab order between
controls is the order that controls are added.  You can't get tabbing
to skip a control.  If you dynamically add/remove controls you can't
achieve your desired tab order.

wxWindows seems like a very impressive work.  The demo is certainly
impressive.  I also suppose I shouldn't rant to much about something
that is free.  However my first two GUIs hit critical problems, and
these were really simple GUIs.  Granted, the first problem has been
fixed now, and I have not yet written a bug report on the second.

Tkinter is also giving me problems.  I have been trying to add
controls to a canvas and to have a scrollbar that will scroll the
controls on the canvas.  I think I have it figured out now, but it is
damn near impossible to figure out from the documentation.  I had to
scour the internet looking for solutions.

I have also played with displaying video in both wxWindows and Tk.
I have raw gray scale data simply as a list of values range 0-255. 
Using PIL I can easily convert to a format wxWindows and Tk can
display.  I get around 30 fps with wxWindows and 15 fps with Tk. 
However, all images wxWindows displays must be full 24-bit color.  If
the images didn't need to be expanded to (r,g,b) I would expect
signifcant speed up.  I don't know why Tk is so much slower.

wxWindows and Tk are the only toolkits that wrap native Windows
controls.  The others all emulate controls.  I am thinking about
trying out another toolkit.
FOX, FLTK or GTK.

I am having enough trouble convincing people to use Python.  I'd never
be able to get my work to purchase Qt.  They would prefer to do
everything in VB6.


From tzot at sil-tec.gr  Thu Jan  8 12:19:57 2004
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Thu, 08 Jan 2004 19:19:57 +0200
Subject: Pre-PEP: Dynamically evaluating default function arguments
References: <mailman.164.1073430486.12720.python-list@python.org>
	<pan.2004.01.07.20.57.17.118092@yahoo.com>
Message-ID: <p14rvv03tvtvbpoqoatfhk2q05obkemcc7@4ax.com>

On Wed, 07 Jan 2004 20:58:30 GMT, rumours say that Samuel Walters
<swalters_usenet at yahoo.com> might have written:

>OT:  I once worked with a fellow that had just enough knowledge about our
>business and systems to suggest wildly bad ideas to "improve" our
>applications.  On one particular project, he was required at several of
>the requirements gathering meetings.  He took up a crusade that wasted
>much of our time explaining to him that his idea was not only undesirable,
>but incredibly unworkable.  When the preliminary timeline for the project
>was passed around via email so that we could all ask for corrections I
>added his idea as a milestone with a projected completion date of "After
>the eventual heat death of the universe."  The project manager happily
>emailed him that his proposal had been accepted and added to the timeline.
> He was quite pleased with himself and was much easier to work with since
>he had "made a difference."

So, perhaps we should invent a new reply for all wild ideas about Python
(I've had my share of these :)

"Thank you for your contribution; your suggestion has been judged worthy
of inclusion in Python 4k.  Upload your patch to sf.net as soon as
Python 3k final is released."
-- 
TZOTZIOY, I speak England very best,
Ils sont fous ces Redmontains! --Harddix


From dlmurray at micro-net.com  Sun Jan  4 19:58:17 2004
From: dlmurray at micro-net.com (Dave Murray)
Date: Sun, 4 Jan 2004 17:58:17 -0700
Subject: Why does this fail?
Message-ID: <vvhdlm72386b3c@corp.supernews.com>

New to Python question, why does this fail?

Thanks,
Dave

---testcase.py---
import sys, urllib, htmllib
def Checkit(URL):
    try:
        print "Opening", URL
        f = urllib.open(URL)
        f.close()
        return 1
    except:
        return 0

rtfp = Checkit("http://www.python.org/doc/Summary.html")
if rtfp == 1:
    print "OK"
else:
    print "Fail"


python testcase.py





From brett at python.org  Mon Jan 19 18:03:43 2004
From: brett at python.org (Brett C.)
Date: 19 Jan 2004 15:03:43 -0800
Subject: python-dev Summary for 2003-12-01 through 2003-12-31
References: <mailman.279.1073795910.12720.python-list@python.org>
	<4001a488$0$317$e4fe514c@news.xs4all.nl>
Message-ID: <8ab0589d.0401191503.772166f2@posting.google.com>

Irmen de Jong <irmen at -NOSPAM-REMOVETHIS-xs4all.nl> wrote in message news:<4001a488$0$317$e4fe514c at news.xs4all.nl>...
> First: thanks Brett, for the summary. And get well soon from your pneumonia.
> 

Thanks.  The doctor has cleared me of pneumonia.  Now if the funky
feeling in my lower back when I bend over would just go away I would
be willing to claim I am perfectly healthy.

> Brett wrote:
> 
> > ------------------------
> > Compiling 2.4 under .NET
> > ------------------------
> > Martin v. L?wis has started sandbox work on an MSI installer and moving 
> > Python 2.4 over to VC 7.
> 
> MSI? Why, what is wrong with the old installer?
> I'm not too fond of MSI installers, I find them slow and large.
> Especially when using lots of files. That may be a problem in the
> installer script, but almost all MSI installers I encountered were
> extremely slow when installing and deinstalling a program that
> consists of a lot of files (and Python does).
> (I must note that this is much less so with recent versions
> than before, because the help files are no longer in seperate
> html files but in a single chm file).
> 

I am guessing here, but I think it has to do with maintennance and
modernization.  The WISE installer was only maintained by Tim Peters
and he has been hella (too much time in Berkeley) busy for a while
now.  Moving over to MSI allows Martin to handle it along with anyone
else who has experience with MSI installers (which seems to be more
than WISE from the emails on the list).  Decentralizing reliance on
individuals is important in case someone falls off the face of the
earth.  The Python 2.3 releases have mostly been handled by people who
did not usually handle it.  Yes, there were some issues, but now there
a bunch more people who know how to deal with a release.

Beyond that I don't know since I am an OS X user now and just compile
from source.  =)

-Brett


From reply.in.the.newsgroup at my.address.is.invalid  Thu Jan  1 09:14:18 2004
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Thu, 01 Jan 2004 15:14:18 +0100
Subject: Uploading a file with ftplib
References: <mailman.13.1072964596.12720.python-list@python.org>
Message-ID: <hma8vv0hk1e2aeujbgsd5t64p04p90ksfr@4ax.com>

Michael_Goettsche: 
>can anybody please tell me how to upload it properly?

This is a snippet from one of my scripts, that works fine:

    ftp = ftplib.FTP(Hostname,Username,Password)
    ftp.cwd(WorkingDirectory)
    ftp.storbinary("STOR " + RemoteZipFile, file(LocalZipFile, "rb"))
    ftp.quit()

-- 
Ren? Pijlman


From michele.simionato at poste.it  Tue Jan 13 09:41:54 2004
From: michele.simionato at poste.it (Michele Simionato)
Date: 13 Jan 2004 06:41:54 -0800
Subject: Debugging Python
References: <mailman.215.1073656414.12720.python-list@python.org>
	<3FFEBDBC.2F9DFD03@engcorp.com>
	<xqxllohbejp.fsf@cola2.ca.boeing.com>
	<3fffbe99.486050433@news.blueyonder.co.uk>
	<4002AE9B.C51448FB@engcorp.com>
	<bu0eq4$pqt$1@newstree.wise.edt.ericsson.se>
Message-ID: <95aa1afa.0401130641.50e721fd@posting.google.com>

"Frithiof Andreas Jensen" <frithiof.jensen at removethis.ted.ericsson.dk> wrote in message news:<bu0eq4$pqt$1 at newstree.wise.edt.ericsson.se>...
> "Peter Hansen" <peter at engcorp.com> wrote in message
> news:4002AE9B.C51448FB at engcorp.com...
> 
> > ...., as it takes me only about twenty seconds to start a
> > new test file and that's *without* using a template.
> 
> ....in twenty seconds you can just about write "import unittest" ;-)
> 
> I find that a simple module will need about three to five tests for each
> method in each class and probably some test data as well often yielding in
> total *more* lines of test code than the module I want to test.
> 
> It is simple, stupid & boring code but still lines that have to be typed and
> debugged.
> 
> *That* is tedious work. Always will be.

That's why I use "doctest" much more than "unittest". 

     Michele


From Scott.Daniels at Acm.Org  Tue Jan 20 00:41:38 2004
From: Scott.Daniels at Acm.Org (Scott David Daniels)
Date: Mon, 19 Jan 2004 21:41:38 -0800
Subject: efficent test for array with only one value?
In-Reply-To: <25mud1-s1m.ln1@jowls.lairds.org>
References: <00ird1-dmd.ln1@jowls.lairds.org>
	<PJYOb.82151$C87.70674@twister.socal.rr.com>
	<25mud1-s1m.ln1@jowls.lairds.org>
Message-ID: <400cca0d$1@nntp0.pdx.net>

Kyler Laird wrote:
> Robert Kern <rkern at ucsd.edu> writes:
> ... I'm guessing that reduce
> will not stop immediately when equal encounters a False. 

If the early stop is what you want, how about:
     if vector:
         d = {}
         d[vector[0]] = 0
         try:
             for el in vector:
                 d[el]
         except KeyError:
             return False
     return True

-Scott David Daniels
Scott.Daniels at Acm.Org


From david at no.westcontrol.spam.com  Fri Jan 16 07:59:30 2004
From: david at no.westcontrol.spam.com (David Brown)
Date: Fri, 16 Jan 2004 13:59:30 +0100
Subject: keeping Python code properly indented
References: <3064b51d.0401151125.711ade4c@posting.google.com>
Message-ID: <bu8mv8$n03$1@news.netpower.no>


<beliavsky at aol.com> wrote in message
news:3064b51d.0401151125.711ade4c at posting.google.com...
> How do you keep Python code properly indented as you modify it? I use
> an Emacs-type editor that has a Python mode, so the initial indenting
> is easy. If I later want to put a 'for' loop (or an 'if' statement)
> around a bunch of code, I find myself going through the body of the
> loop, manually re-indenting to keep the nested loops correct. There
> should be a better way.
>

Any decent editor will do the indenting in a couple of keystrokes.  And even
doing it manually, if your looped code is so many lines that manually
"tabbing" each is a a big chore, you should probably break it into smaller
functions for clarity.

> I think that having a 'for' loop end with a matching 'next' statement,
> as done in (for example) Basic, is a safer and clearer way of writing
> loops, although some Python programmers consider this a 'feature'
> rather than a 'bug'.

When programming in Basic, you still have to indent the contents of the loop
(manually or otherwise, depending on the editor).  Just because the basic
interpreter / compiler will work without sensible indentation, does not mean
that mismatches between the code structure and the code appearance
(especially indentation) is in any way a good thing.





From jjl at pobox.com  Sun Jan 11 09:22:13 2004
From: jjl at pobox.com (John J. Lee)
Date: 11 Jan 2004 14:22:13 +0000
Subject: What is best for web application development??
References: <mailman.261.1073735066.12720.python-list@python.org>
	<btq5er$a2shs$1@ID-139865.news.uni-berlin.de>
Message-ID: <878ykelg4q.fsf@pobox.com>

Dave Kuhlman <dkuhlman at rexx.com> writes:

> ketulp_baroda wrote:
> 
> > i am developing a web application and i am really confused on what
> > should i use.
[...]
> You may also want to join the web-sig email list and ask your
> question there.

Or not: that list is supposed to be for discussion of what new
web-related code should go into the standard library, not for
questions about choosing a web framework.


John


From blaktyger at hotmail.com  Tue Jan  6 11:53:53 2004
From: blaktyger at hotmail.com (Blaktyger)
Date: 6 Jan 2004 08:53:53 -0800
Subject: Downloading files off Interet
References: <c9e6ac92.0401052332.294e2373@posting.google.com>
	<q02lvv8mr2btomp0e56l64c9cq14qeodcg@4ax.com>
Message-ID: <c9e6ac92.0401060853.3f8fb3a2@posting.google.com>

Terry Carroll <carroll at tjc.com> wrote in message news:<q02lvv8mr2btomp0e56l64c9cq14qeodcg at 4ax.com>...
> On 5 Jan 2004 23:32:53 -0800, blaktyger at hotmail.com (Blaktyger) wrote:
> 
> >I would like to download some mp3 files from a web site. There is to
> >much of them and I had the idea of writing a script to do it for me.
> >
> >Code:
> >import string
> >import urllib
> >
> >f = urllib.urlopen(""" http://www.somemp3site.com/somemp3.com""")
> >
> >fic=open('mp3file.mp3','w')
> >fic.write(f.read())
> >fic.close()
> >f.close()
> >
> >I ran the program and the file is not playing.
> >Can someone help me?
> 
> 
> A couple possibilities:
> 
> First, are you running on Windows?  If so, you want your output file
> opened binary:
> 
>  fic=open('mp3file.mp3','wb')
> 
> Second, what does your output file look like?  See if it's a text error
> message.  Some sites will check to see whether there is a referring page
> from their own web site, and disallow transfer otherwise (or divert to a
> different site).  If your somemp3site.com site does that, your download
> will fail.
> 
> The only way I know around this is to give up using urllib, and use
> urllib2 instead, opening a Request rather than the url directly, and
> specifying the referring page from which you picked up the URL to the MP3
> page.
> 
> I can give more detail on this, but check the binary open first.
> 
> Also, if the referring page is not the issue, you will probably find it
> much simpler to use urlretrieve instead.  See
> http://www.python.org/doc/current/lib/module-urllib.html .
> 
> Instead of:
> 
>  import string
>  import urllib
>  f = urllib.urlopen(""" http://www.somemp3site.com/somemp3.com""")
>  fic=open('mp3file.mp3','w')
>  fic.write(f.read())
>  fic.close()
>  f.close()
> 
> You just do:
> 
>  import urllib
>  urllib.urlretrieve(""" http://www.somemp3site.com/somemp3.com""")
> 
> That's it.  It's almost cheating.
> 
> Unfortunately, there's no urllib2.urlretrieve, so if that referring page
> thing is your issue, you can't use urlretrieve.
> 
> Hope this helps.

Cheating is fun =)
Thanks people!


From james at logicalprogression.net  Wed Jan 21 16:01:33 2004
From: james at logicalprogression.net (James Henderson)
Date: Wed, 21 Jan 2004 21:01:33 +0000
Subject: Need help with Python class idioms
In-Reply-To: <200401212051.50411.james@logicalprogression.net>
References: <f5c5dc88.0401211243.7e81a26b@posting.google.com>
	<200401212051.50411.james@logicalprogression.net>
Message-ID: <200401212101.33605.james@logicalprogression.net>

[Tad Marko]
> >     def saveToDB(self, db):
> >         if self.mandatoryVar1 == None:
> >             raise Exception, "Mandatory Var 1 not set."
> >         if self.mandatoryVar2 == None:
> >             raise Exception, "Mandatory Var 2 not set."

P.S. Since you're asking about idiom, it would be more Pythonic to write:

    if self.mandatoryVar1 is None:

using the identity test "is" rather than equality test "==", since there is 
only one None.

James
-- 
James Henderson, Logical Progression Ltd.
http://www.logicalprogression.net/
http://sourceforge.net/projects/mailmanager/




From quentel.pierre at wanadoo.fr  Tue Jan  6 16:56:57 2004
From: quentel.pierre at wanadoo.fr (Pierre Quentel)
Date: Tue, 6 Jan 2004 22:56:57 +0100
Subject: help needed with class and method confusion
References: <20040106102232.19889.00002028@mb-m01.aol.com>
Message-ID: <btfavc$im9$1@news-reader3.wanadoo.fr>

If I understand the problem, you have a planet and a number of moons turning
around it. So you should define two different classes, Planet and Moon

--------------------------------
class Moon:

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

class Planet:

    def __init__(self,names):
        self.moons = []
        for name in names:
            m=Moon(name)
            setattr(self, name, m)
            self.moons.append(m)

satellites = ["Io", "Europa", "Ganymeade"]
Jupiter = Planet(satellites)
-------------------------------

You'd better leave the satellite names outside of the __init__ method of
Planet,
in case you happen to work on another planet

Hope this helps,
Pierre




From zero.kelvin at web.de  Sat Jan 24 05:41:02 2004
From: zero.kelvin at web.de (Tim Adler)
Date: Sat, 24 Jan 2004 11:41:02 +0100
Subject: Apache: mod_python
Message-ID: <buti3t$bi0$05$1@news.t-online.com>

Hello everyone!

Perhaps this is not the right place to ask, but I cannot find a better one.
I'm trying to get Python to run as an Apache module (basically I would like
to use ViewCVS).

I installed mod_python and added this stuff to the httpd.conf

LoadModule python_module libexec/mod_python.so
AddHandler python-program .py
PythonHandler mod_python.publisher
PythonDebug OnStill when I access a given .py file (the one that ViewCVS
suggests), I get an 500-error and the Apache states in the error.log that it
cannot import a "mod_python.apache".Can somebody help me ?Thx, Tim




From martin at v.loewis.de  Sun Jan 11 16:18:51 2004
From: martin at v.loewis.de (Martin v. =?iso-8859-15?q?L=F6wis?=)
Date: 11 Jan 2004 22:18:51 +0100
Subject: Python And Internationalization maybe a pre-pep?
References: <3ffede43$0$563$b45e6eb0@senator-bedfellow.mit.edu>
	<3FFF36A1.40303@v.loewis.de> <YSKLb.10550$5V2.17781@attbi_s53>
	<40011315.7070000@v.loewis.de> <8EeMb.24302$5V2.36981@attbi_s53>
Message-ID: <m3oetaxjyc.fsf@mira.informatik.hu-berlin.de>

Brian Kelley <bkelley at wi.mit.edu> writes:

> def foo(...):
>      return i"Message"
> 
> You wouldn't have to execute foo directly for the parse tree to notice
> that i"Message" was a string that is supposed to be
> internationalized. This process gets this string placed in the
> internationalization table which I would then use various tools to
> modify and translate.

But this is the technology today! The xgettext utility (either
GNU xgettext, or xgettext.py) extracts internationalized strings
from Python code into "internationalization tables". These tables
are called "PO files". They get translated, then converted into
an efficient internal representation, called "mo files". 

I'm uncertain how this relates to the internationalization tables
you are proposing, but please recognize that a single application
may have *multiple* such tables, called "textual domains". To
find a translation, you not only need the message id, but you
also need the textual domain.

> This should tranparent to Gui Widgets and the like so you can place
> i"Message" in a list box, it will automatically get internationalized
> but when you get the result of the user selected, it still can be used
> to dictionary look ups exactly the same as the original i"Message".

Using what textual domain?

> My current thinking is as follows, I could get most of this effect by
> not having a new string type (i"") and just making an
> internationalization string type.  Then I would just use code analyzer
> tools to generate the translation tables as Serge suggested, heck,
> they could even use the parse module if I was so inclined.

xgettext.py already performs very simple parsing of source files,
to extract messages. Why reinvent the wheel?

> In either case, I far prefer using internation("This is good") over
> the _("This is good") function call.

So do call it internation(), or internationalization() or something
else. It is just a function:

def internation(msg):
  return gettext.dgettext("some domain", msg)

Regards,
Martin


From llothar at web.de  Wed Jan 14 09:38:07 2004
From: llothar at web.de (Lothar Scholz)
Date: 14 Jan 2004 06:38:07 -0800
Subject: what is best for web development??
References: <f046efac.0401100358.5aa812a0@posting.google.com>
	<87wu80559x.fsf@blakie.riol>
	<f046efac.0401120330.5c2e7c50@posting.google.com>
	<87oet9grqy.fsf@blakie.riol>
	<e9570f37.0401121052.ed79710@posting.google.com>
Message-ID: <6ee58e07.0401140638.672d50a7@posting.google.com>

graham__fawcett at hotmail.com (Graham Fawcett) wrote in message news:<e9570f37.0401121052.ed79710 at posting.google.com>...
> Wilk <wilkSPAM at OUTflibuste.net> wrote in message news:<87oet9grqy.fsf at blakie.

> If it has to be a one-shot install, I would suggest a Web server
> written in Python -- Medusa or Twisted, probably -- that you could
> bundle with your Python app. Find a Web app framework that (a) works
> on Medusa or Twisted and (b) has the templating features you
> require/desire.

I would not recommend this. A distribution with an own apache server
seems to be the best. It is easy to hide the setup and the customers
know that there is a good working technologie behind the scenes. And
it can be managed by every normal administrator. This is a very
important point for larger customers.

I would recommend webware+Fun Form Kit+cheeta together with apache.


From noemail at noemail4u.com  Fri Jan  9 07:28:27 2004
From: noemail at noemail4u.com (Dang Griffith)
Date: Fri, 09 Jan 2004 12:28:27 GMT
Subject: How to log unittest results?
References: <afbb8061.0401071305.6b7e4aa0@posting.google.com>
Message-ID: <30423f111f634a26f0860b79e915918e@news.teranews.com>

On 7 Jan 2004 13:05:59 -0800, ericjnilsen at earthlink.net (EricN) wrote:

>I like to use unittest.  However, when my QA Manager shows up in my
>cube and says "Give me evidence that all your unit tests passed", I
>have nothing to provide.  I'd like to log the unittest results
>(verbose mode) somehow.  I'm open: logger module, stdmsg redirect,
>whatever.

Another way to pacify the QAM would be to show the version control
log.  If you check your stuff in at each stage, and have comments
saying what was fixed (e.g., "passed unittest XYZZY"), that should be
sufficient for QA purposes.  QA confirms that the process is being
followed--not that the code works.

Sorry I can't help, but why would your QAM care about this level of
detail?  Unless your code is looking bad (i.e., high defect density)
later, when it's integrated, your personal development process, i.e.,
using unittest or not, is too low-level of a detail.  MicroQAM.  Does
your QAM also want to see marked up printouts of your code, showing
that you performed a code review?  Design review?  Etc?

    --dang


From noemail at noemail4u.com  Wed Jan 14 13:05:52 2004
From: noemail at noemail4u.com (Dang Griffith)
Date: Wed, 14 Jan 2004 18:05:52 GMT
Subject: id3v2 module
References: <pan.2004.01.13.09.12.39.813880@beeznest.NOSPAM.net>
	<mailman.324.1074009121.12720.python-list@python.org>
Message-ID: <d16b21bc42e289df5168e7f5f95091e8@news.teranews.com>

On Tue, 13 Jan 2004 15:47:21 +0000, Andy Todd <andy47 at halfcooked.com>
wrote:

>Dusausoy Bruno wrote:
>
>> Hi,
>> 
>> I'd like to know if there is a third-party module for reading/writing
>> id3v2 informations.
>> Thanks 
>
>http://www.nedbatchelder.com/code/modules/id3reader.html

Go to sourceforge and search for any of 'pyid3', 'ptommi', or 'eyed3'.
I've used a couple to fix my ipod database a few times.  Well, not the
ipod database itself, but renaming files and fixing tags so that
ephpod can rebuild the database.
    --dang


From reply.in.the.newsgroup at my.address.is.invalid  Thu Jan 22 04:52:42 2004
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Thu, 22 Jan 2004 10:52:42 +0100
Subject: python
References: <mailman.626.1074743244.12720.python-list@python.org>
Message-ID: <d57v00puiejhu61581g3q6tt31td520l1a@4ax.com>

Jess Martin:
>every time i try to do a command more than a line long it wont work

You must be doing something wrong then :-)

Check the documentation:
http://www.python.org/doc/current/ref/line-structure.html

-- 
Ren? Pijlman


From yin_12180 at yahoo.com  Mon Jan 26 11:25:00 2004
From: yin_12180 at yahoo.com (Yin)
Date: 26 Jan 2004 08:25:00 -0800
Subject: BaseHTTPServer and class variables
Message-ID: <88caaeda.0401260825.4db9a07d@posting.google.com>

Hello.

I am using the basehttpserver to implement the HTTP protocol to serve
a fairly large lexicon that I have loaded as a dictionary in python. 
Rather than writing a whole server, I would like to reuse the
BaseHTTPserver classes. I am interested in finding a way to serve the
dict without loading the whole dict into memory everytime an HTTP
request is made. The dict lives in local memory when it is loaded and
takes a long time to load.

Unfortunately with the basehttpserver.httpserver and
basehttpserver.requesthandlerclass, I am not finding it easy to define
a method to load the dict initially.  Any thoughts are appreciated.

Ideally, in a do_GET for the requesthandlerclass, it'd be nice to be
able to access the dict as a class variable, but this doesn't work for
me.

Thanks.
Yin


From http  Thu Jan  8 22:48:38 2004
From: http (Paul Rubin)
Date: 08 Jan 2004 19:48:38 -0800
Subject: convert a list to a string
References: <3FFE1E29.20801@hotmail.com> <7xwu81dcr7.fsf@ruckus.brouhaha.com>
	<3FFE2084.7010700@hotmail.com>
Message-ID: <7x7k01lr3d.fsf@ruckus.brouhaha.com>

Bart Nessux <bart_nessux at hotmail.com> writes:
> How does randint and sample differ? I was under the impression that
> sample was more random.

No, they both use the same underlying generator.

randint gives you one random number, which is what you want.
sample takes a list and selects some elements from it.

As I mentioned in another post, the underlying generator is designed
to have good statistical properties for doing things like simulations.
It's not designed to withstand someone actively trying to predict the
next random number based on the previous output stream.  If you're using
it in an application like a high-stakes online game, where players have
significant incentive to predict the output, then you should get your
random numbers a different way.  Doing that kind of thing properly
takes a lot of skill though--it's not something newbies should attempt.


From jepler at unpythonic.net  Sat Jan  3 08:58:30 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Sat, 3 Jan 2004 07:58:30 -0600
Subject: Python for Embedded Devices?
In-Reply-To: <efa6f675.0401021920.3bffced0@posting.google.com>
References: <efa6f675.0401021920.3bffced0@posting.google.com>
Message-ID: <20040103135830.GA13723@unpythonic.net>

There have been a few projects to bring Python to "small" platforms like
handheld computers such as wince and palm.  These are typically full
implementations of Python with a few omissions from the core language
(eg unicode, complex numbers) and a stripped-down set of standard
modules.  I think this typically requires a meg or two for installation,
and I don't know whether these projects are actively maintained.

Jeff



From mwh at python.net  Thu Jan 15 06:18:45 2004
From: mwh at python.net (Michael Hudson)
Date: Thu, 15 Jan 2004 11:18:45 GMT
Subject: best book
References: <mailman.372.1074117050.12720.python-list@python.org>
Message-ID: <m37jztwjca.fsf@pc150.maths.bris.ac.uk>

km <km at mrna.tn.nic.in> writes:

> Hi all,
> 
> What is the best book to start with python ? i am have been working
> since 1 yr with Perl.

I posted this last week:

----------------------------------------------------------------------
Thomas Mang <a9804814 at unet.univie.ac.at> writes:

> Hello,
>
> I have programmed mostly in C++ lately, and I want to start learning
> Python now.
>
> Which books would you recommend to buy?

Well, maybe, none.  Have you tried the online material?

    http://www.python.org/topics/learn

and in particular

    http://www.python.org/topics/learn/prog.html

> I am both looking for an introduction into the language, as well as
> complete guides.

For the "complete guide", what I've seen of Python in a Nutshell is
pretty good.  But I actually don't own any books on Python (well apart
from the one I tech reviewed).

Cheers,
mwh
----------------------------------------------------------------------

-- 
 "Well, the old ones go Mmmmmbbbbzzzzttteeeeeep as they start up and
  the new ones go whupwhupwhupwhooopwhooooopwhooooooommmmmmmmmm."
                         -- Graham Reed explains subway engines on asr


From maney at pobox.com  Sun Jan 11 00:07:20 2004
From: maney at pobox.com (Martin Maney)
Date: Sun, 11 Jan 2004 05:07:20 +0000 (UTC)
Subject: Optimized quoting (was Re: Speed?)
References: <5.2.0.9.0.20040102221218.00b7c870@mail.zomething.com>
	<mailman.43.1073115353.12720.python-list@python.org>
	<bt6muh$bog$1@panix3.panix.com>
	<m3brpi72rb.fsf@pc150.maths.bris.ac.uk>
	<btcfc1$49e$1@panix3.panix.com>
Message-ID: <btqlm8$s6d$1@wheel2.two14.net>

Aahz <aahz at pythoncraft.com> wrote:
> In article <m3brpi72rb.fsf at pc150.maths.bris.ac.uk>,
> Michael Hudson  <mwh at python.net> wrote:
>>aahz at pythoncraft.com (Aahz) writes:
>>> "Premature optimization is the root of all evil in programming."
>>> --C.A.R. Hoare (often misattributed to Knuth, who was himself quoting Hoare)
>>
>>Cite?

> http://www.haskell.org/pipermail/haskell-cafe/2001-January/001461.html

> Anybody have a copy of _Literate Programming_ to check?

Surely someone else must have checked this before now.  Perhaps the
reply went astray, or isn't threaded properly so that I don't see it.
Anyway.  Yes, Knuth says, in a parenthetical aside on page 276, "But I
also knew, and forgot, Hoare's dictum that premature optimization is
the root of all evil in programming."

Which fails to answer the quite reasonable wish for a cite attributing
the phrase, rather than the concept, to Hoare.  (a distinction Cally
likes to troll in her .sig, as you know.)

(I can't believe that I have, by dint of rigorously ignoring all but
the most fascinating threads, gotten close enough to the working end of
this dynamic work-always-in-progress to feel I might have something to
add other than a belated footnote.  Maybe if I got up at 2:30 AM every
day I could find time to read clp!)

-- 
One lesson I've learned from my years as Linux's hood ornament is that
there's something worse: some folks can't be content to just take things
too seriously on their own.  They're not happy unless they can convince
others to go along with their obsession.  -- Linus


From gerrit at nl.linux.org  Sat Jan 10 11:44:02 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Sat, 10 Jan 2004 17:44:02 +0100
Subject: xrange() syntactic sugar
In-Reply-To: <338366A6D2E2CA4C9DAEAE652E12A1DE0106382C@au3010avexu1.global.avaya.com>
References: <338366A6D2E2CA4C9DAEAE652E12A1DE0106382C@au3010avexu1.global.avaya.com>
Message-ID: <20040110164402.GA17806@nl.linux.org>

Delaney, Timothy C (Timothy) wrote:
> > for i in 0:8:2:
> > 	pass 
> 
> This exact syntax has been suggested and rejected a few times now ... it's been suggested a few times on python-dev as well by various luminaries/ I don't think there's a PEP for it though (there probably should be). 

There is, by Thomas Wouters:

PEP 204: Range Literals
14 Juli 2000, rejected.

This would mean [5:1:-1] becomes a literal short for [5, 4, 3, 2].
Is there a theoretical retirement period for PEP rejection? After all,
it's possible that the Python community and/or Guido thinks very
differently about a subject after 5 years. Not that I want to re-open
this PEP, but more as a theoretical question...

yours,
Gerrit.

-- 
4. If he satisfy the elders to impose a fine of grain or money, he
shall receive the fine that the action produces.
          -- 1780 BC, Hammurabi, Code of Law
-- 
PrePEP: Builtin path type
    http://people.nl.linux.org/~gerrit/creaties/path/pep-xxxx.html
Asperger's Syndrome - a personal approach:
	http://people.nl.linux.org/~gerrit/english/



From aahz at pythoncraft.com  Thu Jan 29 12:04:17 2004
From: aahz at pythoncraft.com (Aahz)
Date: 29 Jan 2004 12:04:17 -0500
Subject: number of arguments a function takes
References: <CSaSb.329909$ts4.189798@pd7tw3no>
Message-ID: <bvbeeh$gvn$1@panix2.panix.com>

In article <CSaSb.329909$ts4.189798 at pd7tw3no>,
Elaine Jackson <elainejackson7355 at home.com> wrote:
>
>Suppose one of the arguments of a function f_1 is another function
>f_2. Can f_1 access the number of arguments taken by f_2?  (I'm writing
>a little script to automate the construction of logical truth-tables.)

In theory, yes (because of Python's introspection capabilities).  In
practice, you're likely to want to choose a different mechanism that
doesn't require that information.  If you tell us more about your actual
problem, we may be able to point you in a better direction.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

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


From jmdeschamps at cvm.qc.ca  Mon Jan 19 15:11:16 2004
From: jmdeschamps at cvm.qc.ca (jmdeschamps)
Date: 19 Jan 2004 12:11:16 -0800
Subject: Analysing Word documents (slow) What's wrong with this code
	please!
References: <3d06fae9.0401161351.75e7f5a@posting.google.com>
	<bugpf4$i7$1@news-reader4.wanadoo.fr>
Message-ID: <3d06fae9.0401191211.484e76f2@posting.google.com>

Eric Brunel <eric.brunel at N0SP4M.com> wrote in message news:<bugpf4$i7$1 at news-reader4.wanadoo.fr>...
> jmdeschamps wrote:
> > Anyone has a hint how else to get faster results?
> > (This is to find out what was bold in the document, in order to grab
> > documents ptoduced in word and generate html (web pages) and xml
> > (straight data) versions)
> > 
> > # START ========================
> > import win32com.client
> > import tkFileDialog, time
> > 
> > # Launch Word
> > MSWord = win32com.client.Dispatch("Word.Application")
> > 
> > myWordDoc = tkFileDialog.askopenfilename()
> > 
> > MSWord.Documents.Open(myWordDoc)
> > 
> > boldRanges=[]  #list of bold ranges
> > boldStart = -1
> > boldEnd = -1
> > t1= time.clock()
> > for i in range(len(MSWord.Documents[0].Content.Text)):
> >     if MSWord.Documents[0].Range(i,i+1).Bold  : # testing for bold
> > property
> 
> Vaguely knowing how pythoncom works, you'd really better avoid asking for 
> MSWord.Documents[0] at each loop step: pythoncom will fetch the COM objects 
> corresponding to all attributes and methods you ask for dynamically and it may 
> cost a lot of time. So doing:
> 
> doc = MSWord.Documents[0]
> for i in range(len(doc.Content.text)):
>    if doc.Range(i,i+1).Bold: ...
> 
> may greatly improve performances.
> 
> >    
...
Thanks, it does! And using builtin Find object also.

Jean-Marc


From ville.spamstermeister.vainio at thisisspamprotectiontut.finland  Tue Jan 20 15:45:46 2004
From: ville.spamstermeister.vainio at thisisspamprotectiontut.finland (Ville Vainio)
Date: 20 Jan 2004 22:45:46 +0200
Subject: New to Python: my impression v. Perl/Ruby
References: <mailman.493.1074484056.12720.python-list@python.org>
	<87ad4kxees.fsf@pobox.com>
	<mailman.524.1074550958.12720.python-list@python.org>
	<bujn8d$o32$1@scotsman.ed.ac.uk>
Message-ID: <du765f6e4cl.fsf@mozart.cc.tut.fi>

>>>>> "eddie" == Eddie Corns <eddie at holyrood.ed.ac.uk> writes:

    eddie> Python: because everything's not an object

Umm... everything is an object in Python (except "names"). Whether
everything has to be shoehorned into classes is another thing.

-- 
Ville Vainio   http://tinyurl.com/2prnb


From bdesth.tagada at tsoin-tsoin.free.fr  Sun Jan 18 10:43:23 2004
From: bdesth.tagada at tsoin-tsoin.free.fr (Bruno Desthuilliers)
Date: Sun, 18 Jan 2004 16:43:23 +0100
Subject: Best way to do this?
In-Reply-To: <100kqbt2spltf3b@corp.supernews.com>
References: <100jg9er3qak890@corp.supernews.com>
	<buddtg$gdmvb$1@ID-99293.news.uni-berlin.de>
	<100kqbt2spltf3b@corp.supernews.com>
Message-ID: <400aa4d3$0$24024$626a54ce@news.free.fr>

Wil Schultz wrote:
(Wil, please don't top-post... corrected)
> 
> William Park wrote:
> 
>> Wil Schultz <newz at rekon.org.nospam> wrote:
>>
>>> One of the exercises asks for a program to ask for a password three 
>>> times. Surprisingly this took me much longer that it probably should 
>>> have so I am curious if the following is the easiest way this is 
>>> done. Thanks much!
>>>
>>> *************************************************
>>> #!/usr/local/bin/python
>>>
>>> count = 0
>>> password = "null"
>>>
>>> while count < 3:
>>>         count = count + 1
>>>         password = raw_input("what's the pass: ")
>>>         if password == "mypass":
>>>                 print "Access Granted"
>>>                 count = 3
>>>         else:
>>>                 if count < 3:
>>>                         print "Try Again"
>>>                 else:
>>>                         print "Too Bad"
>>> *************************************************
>>
>>
>>
>> For crying out loud, here's 3 times for you...
>>     password = raw_input("what's the pass: ")
>>     password = raw_input("what's the pass: ")
>>     password = raw_input("what's the pass: ")

>> Okay, maybe I should have said the program should ask for the password 
>> up to 3 times, exiting on a) the correct password b) the third incorrect 
>> password.
>> 
Beware of specs, programmers can have strange interpretations sometimes !-)

import sys
for i in range(3):
    if raw_input("what's the pass: ") == "mypass":
       print "Access granted"
       sys.exit(0)

print "Access denied"
sys.exit(1)

HTH
Bruno





From tdelaney at avaya.com  Mon Jan  5 16:25:23 2004
From: tdelaney at avaya.com (Delaney, Timothy C (Timothy))
Date: Tue, 6 Jan 2004 08:25:23 +1100
Subject: intellectual property agreements and open source . was - Re:
	Whydoes this fail? [2]
Message-ID: <338366A6D2E2CA4C9DAEAE652E12A1DE0106312E@au3010avexu1.global.avaya.com>

> From: Dave Murray
> 
> After re-reading this part, I can see that it is an idea that 
> I like. How
> does participating in open source work for someone (me) who 
> has signed the
> customary intellectual property agreement with the 
> corporation that they
> work for?

The best thing to do is get an explicit exemption - in writing - either for the project as a whole (in this case Python) or for particular aspects. That way there should be no argument.

Tim Delaney



From sandskyfly at hotmail.com  Wed Jan 21 04:46:12 2004
From: sandskyfly at hotmail.com (Sandy Norton)
Date: 21 Jan 2004 01:46:12 -0800
Subject: personal document mgmt system idea
References: <b03e80d.0401200538.10fcf33a@posting.google.com>
	<87wu7mwu8a.fsf@pobox.com>
Message-ID: <b03e80d.0401210146.6690dfad@posting.google.com>

John J. Lee:

> Pybliographer 2 is aiming at these features (but a lot more besides).
> Work has been slow for a long while, but several new releases of
> pyblio 1 have come out recently, and work is taking place on pyblio 2.
> There are design documents on the web at pybliographer.org.  Why not
> muck in and implement what you want with Pyblio?

Thanks for the reference, Pyblio definitely seems interesting and I
will be looking into this project closely.

cheers.

Sandy


From aahz at pythoncraft.com  Mon Jan 19 00:37:33 2004
From: aahz at pythoncraft.com (Aahz)
Date: 19 Jan 2004 00:37:33 -0500
Subject: Suggested generator to add to threading module.
References: <7934d084.0401152058.164a240c@posting.google.com>
	<bu998t$o62$1@panix1.panix.com>
	<7934d084.0401181808.6e698042@posting.google.com>
Message-ID: <bufqet$fs7$1@panix1.panix.com>

In article <7934d084.0401181808.6e698042 at posting.google.com>,
Andrae Muys <amuys at shortech.com.au> wrote:
>aahz at pythoncraft.com (Aahz) wrote in message news:<bu998t$o62$1 at panix1.panix.com>...
>> In article <7934d084.0401152058.164a240c at posting.google.com>,
>> Andrae Muys <amuys at shortech.com.au> wrote:
>>>
>>>Found myself needing serialised access to a shared generator from
>>>multiple threads.  Came up with the following
>>>
>>>def serialise(gen):
>>>  lock = threading.Lock()
>>>  while 1:
>>>    lock.acquire()
>>>    try:
>>>      next = gen.next()
>>>    finally:
>>>      lock.release()
>>>    yield next
>> 
>> I'm not sure this is generic enough to go in the standard library.
>> Usually, I'd recommend that someone wanting this functionality consider
>> other options in addition to this (such as using Queue.Queue()).
>
>I'm curious to know how a Queue.Queue() provides the same
>functionality?  I have always considered a Queue.Queue() to be an
>inter-thread communcation primitive. serialise() (at least the
>corrected version discussed later in this thread) is strictly a
>synchronisation primitive.

Well, yes; Queue.Queue() provides both synchronization *and* data
protection.  In some ways, it's overkill for this specific problem, but
my experience is that there are so many different ways to approach this
class of problems and so many ways to screw up threaded applications,
it's best to learn one swiss-army knife that can handle almost everything
you want to throw at it.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

A: No.
Q: Is top-posting okay?


From nomail at hursley.ibm.com  Wed Jan 28 04:22:00 2004
From: nomail at hursley.ibm.com (Derek Fountain)
Date: Wed, 28 Jan 2004 17:22:00 +0800
Subject: Tcl style traces
References: <40171be5$0$1742$5a62ac22@freenews.iinet.net.au>
	<mailman.890.1075270902.12720.python-list@python.org>
Message-ID: <40177f07$0$1730$5a62ac22@freenews.iinet.net.au>

> What do you need this for?  If you can be more specific, we might be able
> to help you a little better.

I have a Tcl/Tk script which uses a canvas to graphically represent the data
stored in the program. Whenever the data store is updated, a Tcl trace
automatically triggers to ensure the graphical display is kept consistent
with the data. I was after a simple way to convert the script to Python
Tkinter. Without the eqivalent of Tcl traces I'm probably going to have to
think about it... ;o)


From rleeabc at abcnet.com  Thu Jan  8 23:29:46 2004
From: rleeabc at abcnet.com (Ryan Lee)
Date: Fri, 9 Jan 2004 04:29:46 -0000
Subject: online literatures
Message-ID: <btlaoe$e7e$11@pegasus.csx.cam.ac.uk>

I have compiled a list of online literatures, mostly related to
computing/mathematics/economics stuff, at
http://www.srcf.ucam.org/~dl276/bookmarks.php



Comments and additions are welcome!



Ry






From peter at engcorp.com  Fri Jan 16 08:59:18 2004
From: peter at engcorp.com (Peter Hansen)
Date: Fri, 16 Jan 2004 08:59:18 -0500
Subject: do loop
References: <3064b51d.0401160536.5d80fa97@posting.google.com>
Message-ID: <4007EE36.35A586CB@engcorp.com>

beliavsky at aol.com wrote:
> 
> In a Python 'for' loop, one can change the value of looping variable,
> so that
> 
> for i in range(3):
>     i = i*5
>     print i
> 
> is legal code
> 
> In Fortran 90 and 95, the analogous code
> 
> do i=0,2
>    i = i*5
>    print*,i
> end do
> 
> is illegal, because variable 'i' cannot be changed inside the loop.
> The constraint of not allowing the loop variable to change within the
> body of the loop can prevent errors in logic when the body of the loop
> is large.
> 
> Is there a way to write a loop in Python that enforces this
> constraint? Should such functionality be added to the language?

No, absolutely not.  I don't believe this is a common error,
and in fact sometimes even in e.g. FORTRAN or BASIC you *wanted*
to change the loop variable to affect the sequence.  In any case 
Python's typical approach to such things is to treat the programmer 
as an adult.

Note that in Python you can trust that such a change will not affect 
the sequence as it would with some other languages, but if you do
*want* to change the loop variable, and have it affect the sequence, 
you can use a while loop instead.

-Peter


From dialtone#NOSPAM#.despammed at aruba.it  Fri Jan 16 14:25:39 2004
From: dialtone#NOSPAM#.despammed at aruba.it (Valentino Volonghi aka Dialtone)
Date: Fri, 16 Jan 2004 20:25:39 +0100
Subject: Printing to console (No Scroll)
References: <mailman.365.1074103229.12720.python-list@python.org>
	<bu41k5$4in$00$2@news.t-online.com>
	<mailman.366.1074106671.12720.python-list@python.org>
Message-ID: <87n08nvgp8.fsf@vercingetorix.caesar.org>

"Totte Karlsson" <mtk at qm.com> writes:

> Any alternatives to ncurses? It seems like a overkill for this...
import sys, time
nrchars = 0

for i in xrange(10):
    sys.stdout.write("\b \b"*nrchars)
    sys.stdout.flush()
    Str = "%i seconds to go" % (10-i)
    nrchars = len(Str)
    sys.stdout.write(Str)    
    sys.stdout.flush()
    time.sleep(1)
print
    

-- 
Valentino Volonghi, Regia SpA, Milan
Linux User #310274, Gentoo Proud User


From nid_oizo at yahoo.com_remove_the_  Mon Jan 12 17:13:27 2004
From: nid_oizo at yahoo.com_remove_the_ (Nicolas Fleury)
Date: Mon, 12 Jan 2004 17:13:27 -0500
Subject: How to know if a system command doesn't exist?
In-Reply-To: <87r7y450l9.fsf@pobox.com>
References: <KxzMb.1692$PK6.16492@nnrp1.uunet.ca>
	<8KzMb.1701$PK6.16708@nnrp1.uunet.ca> <87r7y450l9.fsf@pobox.com>
Message-ID: <a_EMb.1822$PK6.18176@nnrp1.uunet.ca>

John J. Lee wrote:

> Nicolas Fleury <nid_oizo at yahoo.com_remove_the_> writes:
> 
>>Nicolas Fleury wrote:
> 
> [...]
> 
>>>    How can I know if a system command doesn't exist?  All the ways
>>>I have tried behave like if the system command was existing but
>>>returning one.  I don't want to sound provocative, but open in Perl
> 
> [...]
> 
> Haven't tried popen(), but I assume C's system() (of which os.system()
> is a trivial wrapper, on posix-y OSes) is implemented in terms of
> popen() (or both are implemented in terms of similar lower-level
> stuff).  I get different return codes from system() depending on
> whether the program exists or not, as expected:

It doesn't behave like that on Windows... the return value is 1 weither 
it's the return value of the command executed of if this command doesn't 
exist.  What would be nice, I think, would be to encapsulate the 
difference, and raise an exception if the command doesn't exist.  That 
might implies additional code for Windows, but in the end the python 
code would be more portable.

Regards,

Nicolas



From dw-google.com at botanicus.net  Sat Jan 24 15:09:54 2004
From: dw-google.com at botanicus.net (David M. Wilson)
Date: 24 Jan 2004 12:09:54 -0800
Subject: Apache: mod_python
References: <buti3t$bi0$05$1@news.t-online.com>
Message-ID: <99dce321.0401241209.3f304a61@posting.google.com>

"Tim Adler" <zero.kelvin at web.de> wrote...

> Still when I access a given .py file (the one that ViewCVS
> suggests), I get an 500-error and the Apache states in the error.log that it
> cannot import a "mod_python.apache".Can somebody help me ?Thx, Tim

Did you follow the mod_python install instructions to the letter? The
above suggests an incomplete install. Failling that, have you manually
upgraded Python on the machine? mod_python may be linked against one
version of Python, but may have it's package installed in the library
directory of another.

HTH,


David.


From __peter__ at web.de  Tue Jan 27 10:37:54 2004
From: __peter__ at web.de (Peter Otten)
Date: Tue, 27 Jan 2004 16:37:54 +0100
Subject: Problem with RE matching backslash
References: <7b5e60b8754ab5afcea58d4ecc8b8849@news.meganetnews.com>
Message-ID: <bv60fk$lu8$05$1@news.t-online.com>

Ladv?nszky K?roly wrote:

> What is the correct way to match/search a backslash with regular
> expressions?
> 
> print re.match('\\m', '\\m').group(0)  raises an error while
> print re.search('\\m', '\\m').group(0) yields 'm'
> 
> print re.search('\\m', '\m').group(0) yields 'm'
> print re.search('\\m', 'm').group(0) yields  'm'
> 
> Any helpful comment on this would be appreciated,

The backslash must be escaped twice: once for the Python string and once for
the regular expression:

>>> print re.match("\\\\m", "\\m").group(0)
\m

You can use raw strings to somewhat reduce the number of backslashes (but
beware of backslashes at the end of the string literals):

>>> print re.match(r"\\m", r"\m").group(0)
\m


Peter



From peter at engcorp.com  Tue Jan 13 10:48:01 2004
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 13 Jan 2004 10:48:01 -0500
Subject: Debugging Python
References: <mailman.215.1073656414.12720.python-list@python.org>
	<3FFEBDBC.2F9DFD03@engcorp.com>
	<xqxllohbejp.fsf@cola2.ca.boeing.com>
	<3fffbe99.486050433@news.blueyonder.co.uk>
	<4002AE9B.C51448FB@engcorp.com>
	<bu0eq4$pqt$1@newstree.wise.edt.ericsson.se>
Message-ID: <40041331.1835CD27@engcorp.com>

Frithiof Andreas Jensen wrote:
> 
> "Peter Hansen" <peter at engcorp.com> wrote in message
> news:4002AE9B.C51448FB at engcorp.com...
> 
> > ...., as it takes me only about twenty seconds to start a
> > new test file and that's *without* using a template.
> 
> ....in twenty seconds you can just about write "import unittest" ;-)

You don't know how fast I type.  ;-)

import unittest

class TestCase(unittest.TestCase):
    def test01(self):
        pass
        
if __name__ == '__main__':
    unittest.main()


== 23 seconds... counting launching Scite!  <grin>

I agree with all your other points though.

-Peter


From rimbalaya at yahoo.com  Tue Jan 27 10:00:23 2004
From: rimbalaya at yahoo.com (Rim)
Date: 27 Jan 2004 07:00:23 -0800
Subject: print format for binary representation
Message-ID: <6f03c4a5.0401270700.713a73aa@posting.google.com>

Hi,

>>> print '%x' % 54
36
>>> print '%b' % 54
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
ValueError: unsupported format character 'b' (0x62) at index 1
>>>

No formating string for binary? There %x for hex. Would %b make sense
for bin? Is this worth a PEP?

How do I get 00110110 printed instead of the traceback?

Thanks,
-Rim


From swalters_usenet at yahoo.com  Mon Jan  5 18:06:55 2004
From: swalters_usenet at yahoo.com (Samuel Walters)
Date: Mon, 05 Jan 2004 23:06:55 GMT
Subject: OT: Vertical Tab was Re: indendation question
References: <20031226033210.GA24039@mrna.tn.nic.in>
	<mailman.130.1072540438.684.python-list@python.org>
	<3FF9E883.BC8AB864@engcorp.com>
Message-ID: <pan.2004.01.05.23.05.44.722929@yahoo.com>

|Thus Spake Peter Hansen On the now historical date of Mon, 05 Jan 2004
17:43:15 -0500|
> Well, *almost* any whitespace. :-)
> 
>>>> import string
>>>> string.whitespace
> '\t\n\x0b\x0c\r '
> 
> Of those, only '\t' and ' ' are going to be much help, I think, when
> trying to indent.  Linefeed, carriage return, vertical tab, and form
> feed are most likely not well supported yet. ;-)

What exactly *is* a vertical tab?  I don't think I've ever seen it on a
keyboard or used in the wild.  I think I may have seen it on the
keybindings for a mainframe terminal I once used, but I didn't really dig
too deep because, as far as operating the mainframe was concerned, I was a
well trained monkey who could check and restart failed jobs.

Inquiring minds want to know.

Sam Walters

-- 
Never forget the halloween documents.
http://www.opensource.org/halloween/
""" Where will Microsoft try to drag you today?
    Do you really want to go there?"""



From fuf at mageo.cz  Thu Jan 29 04:50:50 2004
From: fuf at mageo.cz (Michal Vitecek)
Date: Thu, 29 Jan 2004 10:50:50 +0100
Subject: C API: how to tell if x is a new style instance?
In-Reply-To: <401821E2.1070106@rogers.com>
References: <20040128184040.GD11485@foof.i3.cz> <401821E2.1070106@rogers.com>
Message-ID: <20040129095050.GA27902@foof.i3.cz>

Mike C. Fletcher wrote:
>Well, I don't actually know how to check for the spiritual state of a 
>new-style class, but here's how to tell if an instance is an instance of 
>a new-style class:
>
>   * Note that a new-style class is a sub-class of type, while
>     old-style classes are not
>   * Check if isinstance( instance.__class__, type )
>   * <Insert mystical spiritual damnedness check here>

 ahh - it helped. thank you!
 
 but, so it means that PyType_Check() doesn't work for new style
 classes' instances? it returns 0 but i understood from the
 documentation that it should return 1:

 """
 int PyType_Check(PyObject *o)
     Returns true if the object o is a type object, including instances
     of types derived from the standard type object. Returns false in
     all other cases.
 """

-- 
		fuf		(fuf at mageo.cz)



From irmen at -NOSPAM-REMOVETHIS-xs4all.nl  Fri Jan 30 16:17:20 2004
From: irmen at -NOSPAM-REMOVETHIS-xs4all.nl (Irmen de Jong)
Date: Fri, 30 Jan 2004 22:17:20 +0100
Subject: Tcp/ip programs in python
In-Reply-To: <mailman.1055.1075487329.12720.python-list@python.org>
References: <mailman.1055.1075487329.12720.python-list@python.org>
Message-ID: <401ac9e0$0$314$e4fe514c@news.xs4all.nl>

M.Dikmen wrote:
> Do you now a source about socket programming in python? or some source
> codes, demo programs? i really need them

What do you want to achieve using socket communication?
If it is IPC (inter-process-communication) and your other
party is also a Python program, consider Pyro:
http://pyro.sourceforge.net
You don't have to write a single line of gory network/socket
code, with a few lines you can call Python objects on other
machines.

--Irmen



From claird at lairds.com  Fri Jan 23 13:04:12 2004
From: claird at lairds.com (Cameron Laird)
Date: Fri, 23 Jan 2004 18:04:12 -0000
Subject: Tkinter color names/codes
References: <Xns94759F3BCD0B7jseale18insightbbcom@204.127.199.17>
	<pan.2004.01.19.21.06.17.957950@phreaker.net>
	<Xns9478E236A5D3Fjseale18insightbbcom@204.127.204.17>
	<1012mti57i1nsa5@corp.supernews.com>
Message-ID: <1012ogslk3vo456@corp.supernews.com>

In article <1012mti57i1nsa5 at corp.supernews.com>, I confused matters with:
			.
			.
			.
>  >>> import Tkinter
>  >>> l = Tkinter.Label()
>  >>> l.winfo_rgb("red")
>  (65535, 0, 0)
			.
			.
			.
Ugh.  I'm revealing a bad habit I acquired in my Python childhood.
What I *should* have suggested was
  import Tkinter
  Tkinter.Tk().winfo_rgb("cyan")
The Label() and l chatter was just a distraction, for which I
apologize.
-- 

Cameron Laird <claird at phaseit.net>
Business:  http://www.Phaseit.net


From dortmann at lsil.com  Tue Jan 20 15:25:09 2004
From: dortmann at lsil.com (Daniel Ortmann)
Date: 20 Jan 2004 14:25:09 -0600
Subject: an example of a singleton design pattern in python?
Message-ID: <hc63caapdui.fsf@praxis.lsil.com>

Hello,

Does anyone have an example of a singleton design pattern in python?

Thanks!

-- 
Daniel Ortmann, LSI Logic, 3425 40th Av NW, Suite 200, Rochester MN 55901
work: Daniel.Ortmann at lsil.com / 507.535.3861 / 63861 int / 8012.3861 gdds
home: ortmann at venturecs.net / 507.288.7732, 2414 30Av NW #D, Rochester MN 55901
gpg/pgp public key: http://wwwkeys.us.pgp.net
jabber: daniel_ortmann at jabber.org / dortmann at jabber.co.lsil.com


From jjl at pobox.com  Sat Jan 17 15:29:42 2004
From: jjl at pobox.com (John J. Lee)
Date: 17 Jan 2004 20:29:42 +0000
Subject: Python class derived from a C++ base class
References: <b2f253f2.0401171132.6e86eb1a@posting.google.com>
Message-ID: <878yk6tj2h.fsf@pobox.com>

devrim at machsim.com (Devrim Erdem) writes:
[...]
> I would like to allow writing plugins also in python. It is very
> comfortable if the plugin developer could derive a python class from
> the C++ base class.
> 
> I am not well educated to think an elegant and a robust way to do
> this.

http://www.boost.org/libs/python/doc/


John


From theller at python.net  Mon Jan 19 05:05:54 2004
From: theller at python.net (Thomas Heller)
Date: Mon, 19 Jan 2004 11:05:54 +0100
Subject: Retrive unicode keys from the registry
References: <brp3bzwj.fsf@python.net>
	<KSXNb.15179$Wa.2061@news-server.bigpond.net.au>
	<1xpzaa8i.fsf@python.net>
	<69ZNb.15222$Wa.2798@news-server.bigpond.net.au>
	<40086EE5.7020708@v.loewis.de>
	<j7jOb.16549$Wa.4760@news-server.bigpond.net.au>
	<bucl20$qo3$03$1@news.t-online.com>
Message-ID: <hdysjlrx.fsf@python.net>

"Martin v. L?wis" <martin at v.loewis.de> writes:

> Neil Hodgson wrote:
>>    The documentation for RegQueryValue says:
>> """ Unicode: Implemented as Unicode and ANSI versions. Note that Unicode
>> support on Windows Me/98/95 requires Microsoft Layer for Unicode. """
>
> Too bad. Perhaps we should link Python with MSLU?

I don't know how to interpret the license that's contained in
unicows.exe.

REDIST.TXT is this:

<quote>
===============================================
Microsoft Layer for Unicode on Windows 95/98/ME
===============================================

In addition to the rights granted in Section 1 of the Agreement
("Agreement"), with respect to UNICOWS.DLL, you have the following
non-exclusive, royalty free rights subject to the Distribution
Requirements detailed in Section 1 of the Agreement:

(1) You may distribute UNICOWS.DLL with the following: Windows 95,
Windows 98, Windows 98 Second Edition, Windows Millennium, Windows NT4,
Windows 2000, Windows XP, and Windows Server 2003.
<end quote>

Since we're not distributing windows ;-) I don't know what this means.

And LICENSE.TXT contains this:

<quote>
* Distribution Terms.  You may reproduce and distribute an unlimited
number of copies of the Sample Code and/or Redistributable Code
(collectively "Redistributable Components") as described above in object
code form, provided that

(a) you distribute the Redistributable Components only in conjunction
with and as a part of your Application solely for use with a Microsoft
Operating System Product;

[...]

(c) you distribute your Application containing the Redistributable
Components pursuant to an End-User License Agreement (which may be
"break-the-seal", "click-wrap" or signed), with terms no less protective
than those contained herein;

(d) you do not permit further redistribution of the Redistributable
Components by your end-user customers; (e) you do not use """
<end quote>

Thomas


From ma at Bell.com  Thu Jan  1 23:17:37 2004
From: ma at Bell.com (xam)
Date: Fri, 02 Jan 2004 04:17:37 GMT
Subject: botlib
Message-ID: <Bh6Jb.111125$0P1.55984@twister.nyc.rr.com>

I am using botlib (found an old copy
@http://web.archive.org/web/20010804124140/http://www.linkwatcher.com/src/bo
tlib.py
no new ones seem to be posted), particularly the Multibot class to fetch
multiple groups of URLs in a loop. I found that my app would occasionally
get stuck in a forever loop, and I think this is due to the fact that
Multibot waits for all the Unibots to return successfully in a loop, and if
a socket gets 'broken' somehow this will get the loop stuck. As this is sort
of a general asyncore error-handling issue, could someone offer advice?
thanks,
max




From usenet_spam at janc.invalid  Sat Jan 31 00:08:51 2004
From: usenet_spam at janc.invalid (JanC)
Date: Sat, 31 Jan 2004 05:08:51 GMT
Subject: easiest transition for a PHP website to move to Python?
References: <mailman.1023.1075441969.12720.python-list@python.org>
	<6ee58e07.0401300555.12c07aa3@posting.google.com>
Message-ID: <Xns94813E8802945JanC@213.119.4.35>

llothar at web.de (Lothar Scholz) schreef:

> Most important, what can you use ? 
> If you are independ, this means have your own dedicated or virtual
> server,

AFAIK Python Baby has his own HostBaby...  ;-)

-- 
JanC

"Be strict when sending and tolerant when receiving."
RFC 1958 - Architectural Principles of the Internet - section 3.9


From news at badblocks.de  Sat Jan 31 14:08:31 2004
From: news at badblocks.de (Walter Haslbeck)
Date: Sat, 31 Jan 2004 20:08:31 +0100
Subject: problem with weakref.proxy
References: <diose1-fr8.ln1@smell.butthole.homeunix.net>
	<bvgot4$7aj$01$1@news.t-online.com>
Message-ID: <f2bte1-iia.ln1@smell.butthole.homeunix.net>

Peter Otten <__peter__ at web.de> wrote:

> I'd recommend being lazy and using a WeakValueDictionary instead of building
> the machinery on your own. Your code would then look similar to the
> following:

thanks for the tip, but:

[...]
>    def c_show_all():
>        print "all GObs, sorted by priority:"
>        values = GOb.all.values()
>        values.sort()
[...]

I don't want the list to be sorted in the method c_show_all, but when a
new instance is created. Sort a list is an expensive operation, and
c_show_all will be called on every game frame, but new objects are
created much less.

Walter


From skip at pobox.com  Sat Jan 10 17:25:59 2004
From: skip at pobox.com (Skip Montanaro)
Date: Sat, 10 Jan 2004 16:25:59 -0600
Subject: Emacs python mode question
In-Reply-To: <pan.2004.01.10.22.04.08.125000@hotmail.com>
References: <pan.2004.01.10.21.08.16.172000@hotmail.com>
	<mailman.274.1073771373.12720.python-list@python.org>
	<pan.2004.01.10.22.04.08.125000@hotmail.com>
Message-ID: <16384.31735.520343.772245@montanaro.dyndns.org>


    jb> gogo-line is on the menu but is not bound to a key. How can I bind
    jb> it?

M-x global-set-key RET

should do the job interactively.  In your ~/.emacs file use something like:

    (define-key esc-map [g] 'goto-line)

YMMV.  I don't use GNU Emacs anymore.  Keybindings is one area in which
Emacs and XEmacs have diverged.  Try C-h f define-key RET.

Skip



From michele.simionato at poste.it  Mon Jan 19 03:02:12 2004
From: michele.simionato at poste.it (Michele Simionato)
Date: 19 Jan 2004 00:02:12 -0800
Subject: circular dependency between class and its metaclass
References: <mailman.478.1074452823.12720.python-list@python.org>
Message-ID: <95aa1afa.0401190002.4a21f927@posting.google.com>

Stefan Seefeld <seefeld at sympatico.ca> wrote in message news:<mailman.478.1074452823.12720.python-list at python.org>...
> hi there,
> 
> I'v run into a little problem for which I only found an ugly workaround,
> so I'd like to know whether people are aware of better ways to achieve this...
> 
> I'm defining a class 'Class' for which I want to set up a __metaclass__ 'Type'
> which does some work on class variables. In particular, it should apply
> a function on all base classes that are themself derived from 'Class'.
> 
> My first try was:
> 
> ====
> 
> class Class(object):
> 
>      class Type(type):
> 
>          def __init__(cls, name, bases, dict):
> 
>              hierarchy = list(filter(lambda i:issubclass(i, Class), bases))
>              # do something with the hierarchy here
> 
>      __metaclass__ = Type

If "i" is a subclass of Class, then it is an instance of Type: this means
that you can write

class Type(type):
    def __init__(cls, name, bases, dict):
        hierarchy = [i for i in bases if isinstance(i, Type)]
        # I like list comprehension...
 
class Class(object):
     __metaclass__ = Type

Is this nice enough for you?

     Michele Simionato


From pinard at iro.umontreal.ca  Tue Jan 20 22:15:18 2004
From: pinard at iro.umontreal.ca (=?iso-8859-1?Q?Fran=E7ois?= Pinard)
Date: Tue, 20 Jan 2004 22:15:18 -0500
Subject: Pyrex without Python (was Re: calling Pyrex results from C)
In-Reply-To: <400DD5DE.90405@prescod.net>
References: <20040121005749.GA27424@unpythonic.net>
	<400DD5DE.90405@prescod.net>
Message-ID: <20040121031518.GA23308@alcyon.progiciels-bpi.ca>

[Paul Prescod]
> Jeff Epler wrote:

> >How close to impossible would it be to make Pyrex emit Python-free code
> >if there are only 'cdefs'? 

> It will generate a bunch of Python module crap. You could extract the 
> pure-C code from the middle of it.

Or just provide a module containing many stub routines.

> I really don't see much benefit to using Pyrex if even _C_'s standard
> memory management is too extravagant for your needs. What exactly
> would Pyrex buy you if you can't afford to use its high-level features
> like memory management, constructors and OO?

The pleasure of Python-like syntax, of course.

Maybe the fact that one can build and debug prototypes in Python, with
the agenda of later transforming them into C, somehow, without rewriting
so much of them, for environments where the whole of Python, for various
reasons, is not welcome.

-- 
Fran?ois Pinard   http://www.iro.umontreal.ca/~pinard



From eurleif at ecritters.biz  Thu Jan 22 17:53:04 2004
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Thu, 22 Jan 2004 22:53:04 GMT
Subject: strtotime?
Message-ID: <kvYPb.242$af7.175373@newshog.newsread.com>

PHP has a very nice strtotime function (http://php.net/strtotime) which 
converts a date/time in virtually any format into a timestamp. Does 
Python have a similar function?



From rmkrauter at yahoo.com  Sat Jan 24 22:25:59 2004
From: rmkrauter at yahoo.com (Rich Krauter)
Date: Sat, 24 Jan 2004 22:25:59 -0500
Subject: Newbie Nested Function Problem
In-Reply-To: <O4GQb.12838$Tk3.10642@twister.nyroc.rr.com>
References: <O4GQb.12838$Tk3.10642@twister.nyroc.rr.com>
Message-ID: <1075001159.4056.3.camel@vaio>

Looks like you are setting the variable 'leave' to the user input, and
then you are calling the function leave(), but remember that 'leave' has
been set to some string.
So say you enter 'xqz', and expect it to restart the loop when you get
to the leave call --- well, what you are doing is trying to call the
function xqz().
Rich
On Sat, 2004-01-24 at 21:45, Brian Samek wrote:

> I began learning python a few days ago and just wrote the following program.
> I have nested three functions together.  For some reason, the leave function
> works fine when 'y' or 'n' are inputted, but it does not restart itself when
> other things are inputted.  Why is this?
> 
> Thanks,
> 
> Brian Samek
> 
> # Brian Samek
> # Created 01/24/2004
> 
> # This program counts down from a user-defined integer less than or equal
> # to 500.
> 
> print "This program counts down from any number less than or equal to 500"
> print
> 
> # ask_number gets the number from the user and then puts it into countdown
> 
> def ask_number():
>     number = input("Please enter a number.\n")
>     if number > 500 or number - int(number) != 0 or number < 1:
>         print "Input positive integers less then 501 only, please."
>  ask_number()
>     else:
> # countdown does the actual counting down until 0
>         def countdown (number):
>             if number != 0:
>                 print number
>                 number = number - 1
>                 countdown (number)
>             else:
> # leave asks the user if he wishes to exit
>                 def leave():
>                     leave = raw_input ("Type 'y' to start over - type 'n' to
> exit. ")
>                     if leave == "y":
>                         ask_number()
>                     elif leave == "n":
>                         return
>                     else:
>                         print "Type either 'y' or 'n' please."
>                         leave()
>                 leave()
>         countdown (number)
> ask_number()
> 
-------------- next part --------------
An HTML attachment was scrubbed...
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From vincent at visualtrans.de  Sat Jan  3 14:14:08 2004
From: vincent at visualtrans.de (vincent wehren)
Date: Sat, 3 Jan 2004 20:14:08 +0100
Subject: Py2exe?? Error: Nothing to do?
References: <86df8ed4.0401031028.6edf2381@posting.google.com>
Message-ID: <bt749v$4ce$1@news4.tilbu1.nb.home.nl>

"Nick" <nick889 at mail.com> schrieb im Newsbeitrag
news:86df8ed4.0401031028.6edf2381 at posting.google.com...
| I am trying to turn one of my .py files into an exe and I created a
| setup script and everything, but when i do the follwing "python
| myscript.py py2exe" I get an error saying

Normally you would execute the setup script, not the script you are trying
to freeze: "python setup.py py2exe"

HTH
Vincent Wehren


"Error: Nothing to do"  I am
| using Python 2.3 (not alpha) with the latest binary of py2exe on
| windows 98.
|
| What did i do wrong and how do i fix it, thanks.




From python at hitmedia.com  Sun Jan 25 16:25:39 2004
From: python at hitmedia.com (Python Baby)
Date: Sun, 25 Jan 2004 13:25:39 -0800
Subject: Unique ID for CD or DVD
In-Reply-To: <69TQb.15674$Le1.6291@newssvr27.news.prodigy.com>
References: <69TQb.15674$Le1.6291@newssvr27.news.prodigy.com>
Message-ID: <20040125212539.GA76757@mail.hitmedia.com>

> Does anyone know of an existing algorithm/module for generating a unique ID
> for a given CD or DVD?  This would be something akin to CDDB where a CD is
> recognized based on its content.

There are a few different ways to get a unique ID from an audio CD.
Gracenote/CDDB does it one way.  FreeDB does it another way.  MusicBrainz does it another.

Sorry, it's in C not Python, but the author of MusicBrainz wrote us a good
tool that we use in our CD store, to generate the unique ID of a CD in the drive.
It generates many different fingerprints for the CD in the drive, for you to
pick and choose whichever one you want to use:

http://hitmedia.com/idgen.tgz 

(NOTE: that URL won't work forever.  I just put it up there right now since you asked.)




From martin at v.loewis.de  Fri Jan  2 06:39:30 2004
From: martin at v.loewis.de (Martin v. Loewis)
Date: Fri, 02 Jan 2004 12:39:30 +0100
Subject: finding file size
In-Reply-To: <4V4Jb.12709$Vl6.2811218@news20.bellglobal.com>
References: <4V4Jb.12709$Vl6.2811218@news20.bellglobal.com>
Message-ID: <bt3l9i$pog$07$3@news.t-online.com>

Sean Ross wrote:

> My question is this: Is there a reason why file objects could not have a
> size method or property?

Yes. In Python, file objects belong to the larger category of "file-like
objects", and not all file-like objects have the inherent notion of a 
size. E.g. what would you think sys.stdin.size should return (which
actually is a proper file object - not just file-like)?

Other examples include the things returned from os.popen or socket.socket.

Regards,
Martin



From tjreedy at udel.edu  Mon Jan 26 16:26:50 2004
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 26 Jan 2004 16:26:50 -0500
Subject: Zope
References: <bv2j13$n4oug$1@ID-216549.news.uni-berlin.de>
Message-ID: <bv40mb$c2a$1@sea.gmane.org>


"lenk" <thelastmohiccan at yahoo.com> wrote in message
news:bv2j13$n4oug$1 at ID-216549.news.uni-berlin.de...
> Hi
> I installed zope in suse 9.0(own package).but i can t find start to
> start the server .
> /opt/zope/ ... is it a right path ?
>
> second problem
> Can you give an web example for python (forum,gueastbook ...)
> links pls:)

zope is an independently written and distibuted application written in
Python with its own mailing lists.  If you do not get the answer you want
here, try them instead.

tjr






From zunbeltz at wm.lc.ehu.es.XXX  Thu Jan 15 03:19:14 2004
From: zunbeltz at wm.lc.ehu.es.XXX (Zunbeltz Izaola)
Date: 15 Jan 2004 09:19:14 +0100
Subject: More than one python in a linux
Message-ID: <m165fdbp4t.fsf@llcpxqy.lc.ehu.es>

Hi,

I've build and installed  python 2.2 and python2.3 in a linux box.
Now i want to install some packages (Numeric, wxPython and
scipy). I've install Numeric and wxPython for python2.3 without
problem (python2.3 setup.py install ... and so on). But when I try 

python2.2 setup.py install

I get the following error (for wxpython)

running build_py
copying wxPython/__version__.py -> build/lib.linux-i686-2.2/wxPython
running build_ext
error: invalid Python installation: unable to open /usr/lib/python2.2/config/Makefile (No such file or directory)

and (for numeric something similar)

Traceback (most recent call last):
  File "setup.py", line 195, in ?
    ext_modules = ext_modules
  File "/var/tmp/python-2.2.2-build//usr/lib/python2.2/distutils/core.py", line 138, in setup
  File "/var/tmp/python-2.2.2-build//usr/lib/python2.2/distutils/dist.py", line 893, in run_commands
  File "/var/tmp/python-2.2.2-build//usr/lib/python2.2/distutils/dist.py", line 912, in run_command
  File "/usr/lib/python2.2/cmd.py", line 112, in ensure_finalized
    line = self.cmdqueue[0]
  File "/var/tmp/python-2.2.2-build//usr/lib/python2.2/distutils/command/install.py", line 267, in finalize_options
  File "/var/tmp/python-2.2.2-build//usr/lib/python2.2/distutils/sysconfig.py", line 421, in get_config_vars
  File "/var/tmp/python-2.2.2-build//usr/lib/python2.2/distutils/sysconfig.py", line 326, in _init_posix
distutils.errors.DistutilsPlatformError: invalid Python installation: unable to open /usr/lib/python2.2/config/Makefile (No such file or directory)

Any idea about what can I do?
Thaks in advance

Zunbeltz
-- 
Remove XXX from email: zunbeltz at wm.lc.ehu.esXXX


From mensanator at aol.compost  Thu Jan 15 01:16:50 2004
From: mensanator at aol.compost (Mensanator)
Date: 15 Jan 2004 06:16:50 GMT
Subject: Python bindings for the Gnu Multiprecision library
References: <5eb8fb88.0401130844.6054b2d7@posting.google.com>
Message-ID: <20040115011650.10703.00000052@mb-m13.aol.com>

>Subject: Python bindings for the Gnu Multiprecision library
>From: rick_muller at yahoo.com  (Rick Muller)
>Date: 1/13/04 10:44 AM Central Standard Time
>Message-id: <5eb8fb88.0401130844.6054b2d7 at posting.google.com>
>
>I just discovered the python bindings for the Gnu Multiprecision
>library available at http://gmpy.sf.net. The release notes say that it
>only works for Python 2.3, but I successfully got it to work on Python
>2.2. Way, way cool.
>
>
>For example, the following is an implementation of the Lucas-Lehmer
>test for Mersenne primes:
>
>def lucas(p):
>    "Test whether 2^p-1 is a Mersenne prime"
>    s = 4
>    val = pow(2,p)-1
>    for i in range(3,p+1): s = (s*s-2)%val
>    return not s 
>
>Using normal python long integers, this routine is an interesting toy,
>but not much else. However, with the gmpy libraries, you can grind
>away until your Powerbook G4 burns your lap:
>
>def lucas_gmp(p):
>    "Test whether 2^p-1 is a Mersenne prime"
>    from gmpy import mpz
>    s = mpz('4')
>    val = pow(2,p)-1
>    for i in range(3,p+1): s = (s*s-2)%val
>    return not s 
>
>Way to go, Alex and Gustavo (and anyone else involved)!


The other day I was reading about Linear Congruence on Mathworld.
Naturally, Mathworld tells you how to solve these problems using
Mathematica functions. Not having Mathematica, I looked through
GMPY to see if it had something I could use instead and sure
enough, there it was

gmpy.divm(a,b,m): returns x such that b*x == a (mod m)

A single function call saved me from having to iterate through
617 trillion numbers. It's a great package.

--
Mensanator
Ace of Clubs


From __peter__ at web.de  Sun Jan 25 14:12:17 2004
From: __peter__ at web.de (Peter Otten)
Date: Sun, 25 Jan 2004 20:12:17 +0100
Subject: xrange not hashable - why not?
References: <mailman.764.1075042048.12720.python-list@python.org>
Message-ID: <bv149a$1cp$05$1@news.t-online.com>

Gerrit Holl wrote:

> I was trying to do something like:
> 
> comments = {
>     xrange(0, 4): "Few",
>     xrange(4, 10): "Several",
>     xrange(10, 100): "A lot",
>     xrange(100, sys.maxint): "Can't count them"}
> for (k, v) in comments.items():
>     if n in k:
>         commentaar = v
>         break

[...]

> So, should I use one of the alternatives after all? Or does someone have
> something better to offer?

I think you want bisect():

import bisect

ranges = [
    (0, "Few"),
    (4, "Several"),
    (10, "A lot"),
    (100, "Can't count them")
]

def makelookup(r):
    bounds = [i[0] for i in r][1:]
    names = [i[1] for i in r]
    def find(value):
        return names[bisect.bisect(bounds, value)]
    return find

lookup = makelookup(ranges)

# use it
last = ""
for i in range(-100, 1000):
    if last != lookup(i):
        last = lookup(i)
        print i, last

Note that names needs one more entry than bounds. I "fixed" that by
discarding the first bounds item.

Peter


From fnord at u.washington.edu  Sat Jan  3 22:59:07 2004
From: fnord at u.washington.edu (Lonnie Princehouse)
Date: 3 Jan 2004 19:59:07 -0800
Subject: Python as a numerical prototyping language.
References: <jZJDb.3529$7U1.27181@amstwist00>
	<67n0966wsz.fsf@aster.homelinux.net>
Message-ID: <f70e3538.0401031959.4e1e57dd@posting.google.com>

Johannes.Nix wrote in message news:
> 
> One point about Matlab: The basic Matlab is _expensive_. But in a
> commercial environment Matlab with signal processing extensions costs
> _tens of thousands of dollars_.  If I were founding an engineering
> startup, I would avoid Matlab if possible at all.

Absolutely. 

About a year ago, I attempted to answer the question "Can Python
replace Matlab?" for my workplace.  The conclusion was "Not quite
yet", for two reasons.

The first was purely human: Matlab is entrenched, and there's always
resistance to change (note: lots of people here still swear by Fortran
'77).

The second reason: there's no unified Python environment that gives
you easy access to plotting capability and an interpreter, a la
Matlab.  Python has the ability to do everything Matlab can (and much
more!) but it still requires just enough expertise to find, install,
and learn the various scipy and plotting modules that only the
early-adopter types are willing to do it.

Matlab projects around here have a tendency to start as a few .m
scripts, and to eventually mature into some kind of end-user
application complete with a simple GUI. This is where Python really
outshines Matlab: Tkinter and wxPython are far superior to the GUI
library that's built into Matlab, and the OO nature of Python makes
these more sophisticated applications much easier to develop and
maintain.


From gerrit at nl.linux.org  Fri Jan 23 07:22:00 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Fri, 23 Jan 2004 13:22:00 +0100
Subject: What is object()
In-Reply-To: <bupgfm$h1a$1@panix2.panix.com>
References: <mailman.655.1074790103.12720.python-list@python.org>
	<bup01m$hjm$1@panix1.panix.com>
	<10105gchtsl1a21@news.supernews.com>
	<bupgfm$h1a$1@panix2.panix.com>
Message-ID: <20040123122200.GB2914@nl.linux.org>

Aahz wrote:
> >Unless, of course, you're using the __new__() method.
> 
> "Not much" != "none"  ;-)

"Not much" >= "none" ;-)
Because none is not much ;-)

yours,
Gerrit.

-- 
211. If a woman of the free class lose her child by a blow, he shall
pay five shekels in money.
          -- 1780 BC, Hammurabi, Code of Law
-- 
PrePEP: Builtin path type
    http://people.nl.linux.org/~gerrit/creaties/path/pep-xxxx.html
Asperger's Syndrome - a personal approach:
	http://people.nl.linux.org/~gerrit/english/



From ralph at sluiters.de  Tue Jan  6 05:07:45 2004
From: ralph at sluiters.de (Ralph Sluiters)
Date: Tue, 6 Jan 2004 11:07:45 +0100
Subject: Problem: 'Threads' in Python?
References: <btcfjc$pgu$1@nets3.rz.RWTH-Aachen.DE>
	<vvjmju4aflj591@corp.supernews.com>
Message-ID: <bte1ce$2t5$1@nets3.rz.RWTH-Aachen.DE>

> Wouldn't a better approach be to decouple the cache mechanism from the cgi
> script?  Have a long-running Python process act as a memoizing cache and
> delegate requests to the slow function.  The cgi scripts then connect to
> this cache process (via your favorite IPC mechanism).  If the cache
process
> has a record of the call/request, it returns the previous value
immediately,
> and updates its cache in the meantime.  If it doesn't have a record, then
it
> blocks the cgi script until it gets a result.
The caching can not be decoupled, because the cgi-script gets an folder ID
gets only data from this "folder". So if I decouple die processes, I don't
know which folders to cache and I can not cache all folders, because the
routine is to slow. So I must get the actual folder from cgi and then cache
this one as long as the uses is in this folder and pulls data every 2
Minutes and cache another folder, if
the uses changes his folder.

> How can threading help you if the cgi-process dies after each request
unless
> you store the value somewhere else?  And if you store the value somewhere,
> why not have another process manage that storage?  If it's possible to
> output a complete page before the cgi script terminates (I don't know if
the
> server blocks until the script terminates), then you could do the cache
> updating afterwards.  In this case I guess you could use a pickled
> dictionary or something as your cache, and you don't need a separate
> process.  But even here you wouldn't necessarily use threads.
The data is to large to store it in the memmory and with this method, as you
said, threading wouldn't help, but I store the data in the disk.

My code:

#Read from file
try:
    oldfile = open(filename,"r")
    oldresult =string.joinfields(oldfile.readlines(),'\r\n')
    oldfile.close()
except:
    # Start routine
    oldresult = get_data(ID) # Get xml data
# Print header, so that it is returned via HTTP
print string.joinfields(header, '\r\n')
print oldresult

# ***

# Start routine
result = get_data(ID) # Get xml data
#Save to file
newfile = open(filename, "w")
newfile.writelines(result)
newfile.close()
#END

At the position *** the rest of the script must be uncoupled, so that the
client can proceed with the actual data, but the new data generation for the
next time ist stored in a file.

Ralph




From salgado at freeshell.org  Sat Jan 24 20:49:04 2004
From: salgado at freeshell.org (Guilherme Salgado)
Date: Sat, 24 Jan 2004 23:49:04 -0200
Subject: trouble w/ unicode file
Message-ID: <1074995344.17782.16.camel@maluf.alcatraz>

Hi there,

I have a python source file encoded in unicode(utf-8) with some
iso8859-1 strings. I've encoded this file as utf-8 in the hope that
python will understand these strings as unicode (<type 'unicode'>)
strings whithout the need to use unicode() or u"" on these strings. But
this didn't happen.

Am I expecting something that really shoudn't happen or we have a bug? 

This is the test i've made:
$cat bar.py
#-*- coding: utf-8 -*-
x = '????????????'
print x, type(x)

$python
Python 2.3.3 (#2, Jan  4 2004, 12:24:16)
[...]
>>> import bar
???????????????????????? <type 'str'>

Thanks in advance,
[]'s
Guilherme Salgado

-- 
This email has been inspected by Hans Blix, who has reported that no
weapons of mass destruction were used in its construction. 
Read his report here:
<http://www.un.org/apps/news/infocusnewsiraq.asp?NewsID=414&sID=6>




From tchur at optushome.com.au  Tue Jan 13 00:02:09 2004
From: tchur at optushome.com.au (Tim Churches)
Date: Tue, 13 Jan 2004 16:02:09 +1100
Subject: Accessing "GIS (ESRI shape file)" files from Python ?
Message-ID: <200401130502.i0D529119803@mail005.syd.optusnet.com.au>

An embedded and charset-unspecified text was scrubbed...
Name: not available
URL: <http://mail.python.org/pipermail/python-list/attachments/20040113/b25e4fcc/attachment.ksh>

From dave at pythonapocrypha.com  Fri Jan 23 11:40:28 2004
From: dave at pythonapocrypha.com (Dave Brueck)
Date: Fri, 23 Jan 2004 09:40:28 -0700
Subject: File Install Program Using Python?
References: <1012ij4idech2d6@corp.supernews.com>
Message-ID: <01eb01c3e1cf$9c0e0430$6401fea9@YODA>

CB Hamlyn wrote:
> Hello, I'm currently working on a Modification for the PC game Battlefield
> 1942.  I'm a pretty good VBA Programmer with some Foxpro under belt as well.
> After reading a ton of stuff on-line I'm simply floored by everything Python
> has to offer.
>
> Anyway, I want to create an installation program that takes a folder and all
> it's sub-folders and copies them from a compressed form into the proper
> directory.  Basically a simplified version InstallSheild or whatever.
>
> I assume Python is capable of such a feat and I'm wondering if anyone can
> spin me around, point me in the right direction and shove me toward my goal.

It's definitely possible, but are you more interested in doing it for your own
educational purposes or for getting the job done? If it's the latter then free
installers like InnoSetup and the WinAmp installer will save you a lot of time
since they already work well.

If you just want to do this to learn more, then look into the ZipFile class in
the zipfile module for starters. You can add a lightweight GUI using Mark
Hammond's win32 extensions or Venster, and finally convert it into an
executable with py2exe or one of the other packagers out there.

-Dave




From lubowiecka at go2.pl  Mon Jan 26 10:28:31 2004
From: lubowiecka at go2.pl (Ringwraith)
Date: Mon, 26 Jan 2004 16:28:31 +0100
Subject: python service running on Win Xp,
	but failing on Win NT Workstation :(
Message-ID: <bv3bs0$la0$1@atlantis.news.tpi.pl>

Hello!



I have implemented a Windows Service in Python. It works on Windows XP
properly and logs in Event Viever any 'started' or "stopped" events.

The problem appeared when I tried to start it on Windows NT Workstation.



The following error entry appeared in Event Viewer while starting it.



"The Purge Log Files Service service failed to start due to the following
error:

The service did not respond to the start or control request in a timely
fashion.





Timeout (120000 milliseconds) waiting for service to connect. "



Any ideas what could caused the problem?



I can send the code if necessary.



Thank you in advance,



Nazgul





From zunbeltz at wm.lc.ehu.es.XXX  Fri Jan 16 03:31:31 2004
From: zunbeltz at wm.lc.ehu.es.XXX (Zunbeltz Izaola)
Date: 16 Jan 2004 09:31:31 +0100
Subject: More than one python in a linux
References: <m165fdbp4t.fsf@llcpxqy.lc.ehu.es>
	<qnkzncpnnvm.fsf@arbutus.physics.mcmaster.ca>
Message-ID: <m11xq0b8gs.fsf@llcpxqy.lc.ehu.es>

cookedm+news at physics.mcmaster.ca (David M. Cooke) writes:


> You probably don't have the development package for python2.2
> installed (python2.2-dev or python2.2-devel or something).
>

You are right! I've installed it and it semms that now all goes well.
Thanks.

Zunbeltz
 
> -- 
> |>|\/|<
> /--------------------------------------------------------------------------\
> |David M. Cooke
> |cookedm(at)physics(dot)mcmaster(dot)ca

-- 
Remove XXX from email: zunbeltz at wm.lc.ehu.esXXX


From patricklcam at yahoo.com  Tue Jan 13 21:07:20 2004
From: patricklcam at yahoo.com (Pat Campbell)
Date: 13 Jan 2004 18:07:20 -0800
Subject: Python  & Netware
Message-ID: <7b4a9738.0401131807.4589ca74@posting.google.com>

Hi,

Awhile back Jeff Davey posted a query about Python issues with
NetWare.  Wonder if the issues were solved and if the NetWare port
might be made available?

Thanks in advance

Pat


From vsamarsk at oz.net  Thu Jan 15 00:56:49 2004
From: vsamarsk at oz.net (vsamarsk at oz.net)
Date: Wed, 14 Jan 2004 22:56:49 -0700 (MST)
Subject: Where *.pth files should be located in MacPython2.3?
Message-ID: <3340.4.63.89.150.1074146209.squirrel@www.oz.net>

Does anyone know where do I place my *.pth into Mac Python2.3 to specify
access path to my modules?
Thanx
Vladimir




From swalters_usenet at yahoo.com  Thu Jan 15 23:47:09 2004
From: swalters_usenet at yahoo.com (Samuel Walters)
Date: Fri, 16 Jan 2004 04:47:09 GMT
Subject: python & mathematical methods of picking numbers at random
References: <bu6ptu$kjm$1@solaris.cc.vt.edu>
Message-ID: <pan.2004.01.16.04.45.40.701355@yahoo.com>

| Bart Nessux said |

> I am using method 'a' below to pick 25 names from a pool of 225. A
> co-worker is using method 'b' by running it 25 times and throwing out the
> winning name (names are associated with numbers) after each run and then
> re-counting the list and doing it all over again.
> 
> My boss thinks that 'b' is somehow less fair than 'a', but the only thing
> I see wrong with it is that it is really inefficient and ugly as it's
> doing manually what 'a' does automatically, other than that I think the
> outcome of both methods (25 unique winners from a pool of 225) are the
> same. Anyone disagree with that and if so, please demonstrate how 'b'
> isn't as fair as 'a'
> 
> count = len(list_of_potential_winners)
> 
> a = random.sample(range(count), 25)
> 
> b = random.sample(range(count), 1)
> 
> Thanks!
> Bart

I looked at the code for random.sample, and found out that the two methods
are probabilistically equivalent.  Neither is more or less fair than the
other.

You can, however, poke fun at your cow-orker for using
random.sample(range(count, 1) when random.randint(1,count) would have done
the exact same thing with the way he used random.sample.

HTH

Sam Walters.

P.S.  The code for sample in random.py is very simple and fairly
straightforward.  You should take a peek at it.  The basic algorithm is to
make a list of winners, choose a random number, then if the winner is not
already in the list, add them.  If the winner is already in the list,
retry until a new winner comes up.  Repeat until you have the desired
number of winners.

-- 
Never forget the halloween documents.
http://www.opensource.org/halloween/
""" Where will Microsoft try to drag you today?
    Do you really want to go there?"""



From mcfletch at rogers.com  Fri Jan  9 15:14:03 2004
From: mcfletch at rogers.com (Mike C. Fletcher)
Date: Fri, 09 Jan 2004 15:14:03 -0500
Subject: Problem with OpenGL.GLUT
In-Reply-To: <btn17b$97bnn$1@ID-130333.news.uni-berlin.de>
References: <7447dd2a.0401071402.2c0737e6@posting.google.com>
	<btn17b$97bnn$1@ID-130333.news.uni-berlin.de>
Message-ID: <3FFF0B8B.4050208@rogers.com>

Cousin Stanley wrote:

>Steven .... 
>
>  I'm also having  import  problems 
>  with a Win98 installation of PyOpenGL for Python 2.3
>  from .... 
>  
>
...

>Using  < dependency walker >  to examine .... 
>
>       /site-packages/OpenGL/GLUT.pyd 
>
>shows .... glut32.dll  * Not Found * 
>  
>
PyOpenGL doesn't include the actual GLUT library, just a wrapper around 
it (most systems already have GLUT installed these days).  You can find 
a link for GLUT for win32 here:

    http://pyopengl.sourceforge.net/documentation/installation.html

(look for "Win32 binary package" under GLUT 3.7+).

>I've done a few searches on Google,
>but as yet haven't turned up what
>seems to be a compatible version 
>of this particular missing DLL file .... 
>
>Hopefully, someone here might know
>how to resolve this .... 
>  
>
HTH,
Mike

_______________________________________
  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://members.rogers.com/mcfletch/






From reneaguirre at yahoo.com  Thu Jan 29 16:16:01 2004
From: reneaguirre at yahoo.com (Rene Aguirre)
Date: 29 Jan 2004 13:16:01 -0800
Subject: Strange wxChoice.FindString behavior
Message-ID: <18e22d94.0401291316.afb3dae@posting.google.com>

Hello everybody,

I had this problem using the FindString funcion of a wxChoice object
on wxPython:
  * I have Windows 98
  * I read a text file edited on a Japanese computer, but only uses
'english' characters.
  * From the file I loaded some strings in some wxChoice object.
  * Later when I wanted to find an string using 'FindString' I never
got a match, even when I say my string, I printed both strings and
look same!, same lenght, same internal coding, so the only way to find
my string is by using:

## my own Find string function, choice is a wxChoice object
def FindString(choice, thestring):
	for i in range(choice.GetCount()):
		txta = choiceDevice.GetString(i)
		if len(txta) != len(thestring):
			continue
		if map(ord, txta) != map(ord, thestring):
			continue
		return i #we have a match
	return -1 #not found

So this is my best solution to something I think should not happen.
Any comments?.

Rene


From skip at pobox.com  Wed Jan 14 12:02:17 2004
From: skip at pobox.com (Skip Montanaro)
Date: Wed, 14 Jan 2004 11:02:17 -0600
Subject: passing callback function to c-extension
In-Reply-To: <bu3rmk$t1h$01$1@news.t-online.com>
References: <bu3h15$dlk$00$1@news.t-online.com>
	<bu3n65$1pk$1@news-reader5.wanadoo.fr>
	<bu3rmk$t1h$01$1@news.t-online.com>
Message-ID: <16389.30233.978705.485655@montanaro.dyndns.org>


    Diez> I'm now looking for a way to ensure that the passed object is
    Diez> actually a callable one 

Try it and see.  If an exception is raised, just return NULL.  The
appropriate exception stuff will have been set.

Alternatively, you can test the value of

    PyCallable_Check(obj)

to see if obj is really callable and do your own error recovery.

    - and how to throw exceptions. 

The C API manual is your friend here:

    http://www.python.org/doc/api/api.html

Search for "exception".

Skip



From mir4uu at yahoo.com  Tue Jan 20 11:18:21 2004
From: mir4uu at yahoo.com (mir nazim)
Date: 20 Jan 2004 08:18:21 -0800
Subject: Python database
References: <fa538331.0401200246.3a8da8fd@posting.google.com>
Message-ID: <425cc8d1.0401200818.39bf1452@posting.google.com>

brice.vissiere at costes-gestion.net (Brice Vissi?re) wrote in message news:<fa538331.0401200246.3a8da8fd at posting.google.com>...
> Hi python friends,
> 
> I'm currently working on a data handling tool.
> 
> For internal storage, I'm looking for a 100% python database.
> 
> I have some constraints:
>  + multi-platform
>  + relational with built-in query system (SQL preferably)
>  + built-in string functions
>  + reliable
>  + fast
> 
> I don't care about:
>  + network access
>  + concurracy control
>  + transaction commit/rollback
> 
> One of the key feature I'm looking for is direct string handling in
> queries: concatenation, substring extraction, stripping, justifying,
> ... all we can do with python strings.
> 
> My first thought was to use Gadfly. I've downloaded and installed it.
> Now, I'm  investigating the documentation and examples to find string
> capabilities of Gadfly, but at first look, it seems that it will not
> fit to my needs.
> 
> My problem would be solved by using a database allowing user function
> creation, but I don't know whether such a tool exists.
> 
> So, have you any idea of a db tool I should use ?
> 
> Thanks in advance.
> 
> Brice

Did u try KirbyBase. I do not know about it all features but it is
implemented in pure python
www.netpromi.com/kirbybase


From rroberts at adobe.com  Mon Jan 12 12:17:48 2004
From: rroberts at adobe.com (Read Roberts)
Date: Mon, 12 Jan 2004 09:17:48 -0800
Subject: Help in unwrapping a PyObject* returned by an embedded Python
 function
In-Reply-To: <200401120930.i0C9UTmq032356@se-126.se.wtb.tue.nl>
References: <mailman.256.1073699227.12720.python-list@python.org>
	<200401120930.i0C9UTmq032356@se-126.se.wtb.tue.nl>
Message-ID: <p05200f00bc2884b3549f@[192.168.1.100]>

Thank you taking the time to read and reply.

In fact, I did try all combinations of

in the  Python call-back function :
	return myString
	return (myString)

and, in the  C calling function,

	PyArg_ParseTuple(pyStringResult, "s", myString)
	PyArg_ParseTuple(pyStringResult, "(s)", myString)

Also, the Python documentation (and other working code examples I 
have)  indicate that 'PyArg_ParseTuple',  unlike BuildValues, always 
assumes the arguments are supplied in a argument tuple, even if there 
is only one argumen.

I speculate that an argument list object, as required by 
PyArg_ParseTuple, is not in fact  a simple tuple., and that 
PyArg_ParseTuple cannot be used to parse a regular tuple. Any idea if 
this is correct?

>In comp.lang.python, you wrote:
>
>>  Why does PyArg_ParseTuple fail to parse a  return value which is a tuple?
>>
>>  However, the following does not work:
>>  from Python callback function:		return (myString)
>>  in calling C function:
>>  	if (!PyArg_ParseTuple(pyStringResult, "s", name)) {
>>    		dbprintf(4, "c: failed to parse return value\n");
>>  		PyErr_Clear();
>>  	}
>>  PyArg_ParseTuple fails, and returns NULL. How come? By the
>>  documentation, I would think that PyArg_ParseTuple would parse any
>>  Python tuple object.
>
>To me "s" looks like you are expecting a string and not a tuple. You can
>verify that by seeing what happens if you do 'return "blabla"' instead
>of 'return ("blabla",)'.
>If that works, I would think that changing the "s" to a tuple (ie
>something like "(s)" ) should do the trick.
>
>
>
>Albert
>--
>Unlike popular belief, the .doc format is not an open publically 
>available format.

-- 
-----------------------------------------------------------------------------------------
Read K. Roberts			rroberts at adobe.com
Adobe Systems San Jose TW12 	(408)-536-4402 on Weds
San Francisco 			(415) 642-5642 Mon, Tues, Thurs, Fri



From H.Duerer at gmx.net  Wed Jan 21 11:33:26 2004
From: H.Duerer at gmx.net (Holger Duerer)
Date: 21 Jan 2004 16:33:26 +0000
Subject: py2exe error
References: <mailman.586.1074696033.12720.python-list@python.org>
Message-ID: <87y8s1qn1l.fsf@Ronaldann.demon.co.uk>

>>>>> "Haim" == Haim Ashkenazi <haim at babysnakes.org> writes:

    Haim> Hi
    Haim> (complete newbie warning...:) )

Python or internet newbie?

Google for 'py2exe "no codec search functions registered"'
and click on 'I feel lucky'.


        Holger


From jikosan at myrealbox.com  Sun Jan 11 03:37:51 2004
From: jikosan at myrealbox.com (Jikosan)
Date: Sun, 11 Jan 2004 08:37:51 GMT
Subject: Help with if statement
References: <d91f466b.0401102201.3709771@posting.google.com>
Message-ID: <zX7Mb.56230$C87.47559@twister.socal.rr.com>

Ya, I had mis-read the assignment.

The code is fully functional now. If anyone is curious, here it is.

import random   #import random number generator library
import math     #import math library

file=open('C:\Python\output.txt', 'w')
a, b = -1.0, 1.0    #set boundary conditions
for N in range(0, 100001, 25):   # 100,000 trials at steps of 25
    if N == 0:   #This corrects for N=0
        N = 1
    onecheck = 0
    for n in range(0,N): #generate (x,y) numbers N times.
        xrand = random.random()
        yrand = random.random()
        x = a * (1.0-(xrand)) + b*(xrand)
        y = a * (1.0-(yrand)) + b*(yrand)
        c = math.sqrt(math.pow(x,2.0)+math.pow(y,2.0))  #calculate distance
to origin
        if c < 1:
            onecheck = onecheck+1
    pi = 4.0*(onecheck*math.pow(N,-1))  #This is to calculate P(N), the
ratio of points whose
                                        #distance is less than 1 to the
total number of trials.
    if pi == 0.0: #This is to prevent 'log 0' errors
        pi == 1.0
    log = str(math.log(N, 10))
    file.write(str(math.log(N, 10)))
    file.write('    ')
    file.write(str(math.log(pi, 10)))
    file.write('\n')
file.close()




From exarkun at intarweb.us  Mon Jan 19 23:26:56 2004
From: exarkun at intarweb.us (Jp Calderone)
Date: Mon, 19 Jan 2004 23:26:56 -0500
Subject: stack-like file object
In-Reply-To: <20040119183719.ABC4.JCARLSON@uci.edu>
References: <400be8f3_2@nova.entelchile.net>
	<20040119183719.ABC4.JCARLSON@uci.edu>
Message-ID: <20040120042656.GA5184@intarweb.us>

On Mon, Jan 19, 2004 at 06:43:14PM -0800, Josiah Carlson wrote:
> Rodrigo,
> 
> > I need to implement a stack on a file.
> > The idea is to have a big list, and put part of his head on the disk. The
> > model of access to the file is like a stack (read in order only the tail,
> > write only at the tail).
> > How could I create this, knowing that I need to pickle arbritary objects ?
> 
> While I don't condone the use of files as stacks, the below should work
> for you.  It doesn't reduce in size when an object is removed, but as
> long as you don't try to share the stack between processes or threads,
> it should work fine.

  condone
       v : excuse, overlook, or make allowances for; be lenient with;

> [snip - file-based stack implementation]

  Jp



From jsteve17 at tampabay.rr.com  Mon Jan 19 09:31:55 2004
From: jsteve17 at tampabay.rr.com (JeffS)
Date: Mon, 19 Jan 2004 14:31:55 GMT
Subject: Tkinter
References: <mailman.501.1074519339.12720.python-list@python.org>
Message-ID: <vTROb.42884$873.929032@twister.tampabay.rr.com>

km wrote:

> Hi all,
> 
> Is there any good online tutorial which is a good intro for Tkinter
> programming in Python ?
> 
> regards,
> KM

http://www.ferg.org/thinking_in_tkinter/index.html

http://www.python.org/doc/life-preserver/index.html

http://www.nmt.edu/tcc/help/lang/python/tkinter.html




From jjl at pobox.com  Sat Jan  3 18:44:01 2004
From: jjl at pobox.com (John J. Lee)
Date: 03 Jan 2004 23:44:01 +0000
Subject: pickling lambdas?
References: <9abf3a27.0401031446.4d73cfb2@posting.google.com>
Message-ID: <87oetkppha.fsf@pobox.com>

gongli at cutey.com (gong) writes:

> i would like to pickle a lambda; according to the library docs in 2.3,
> i believe this shouldnt be possible, since a lambda is not a function
> defined at the top level of  a module (?)

Yes.


> however, upon google searching for "python lambda pickle" i find 2
> posts, one including gvr, which apparently demonstrate that this was
> being attempted and even suggest that it is feasible.  has this become
[...]

No, read it again.  What you found was Guido figuring out how to
*prevent* people pickling lambdas.  Functions are pickled by saving
the function name.  Lambdas have no function name, so pickle complains
if you try to pickle them.


John


From knoppix at laptop.home.net  Sat Jan 10 17:35:19 2004
From: knoppix at laptop.home.net (Knoppix User)
Date: Sat, 10 Jan 2004 16:35:19 -0600
Subject: [Newb] Attribute error
Message-ID: <pan.2004.01.10.22.35.15.423247@laptop.home.net>

Hi folks

There is obviously something that is escaping me - please help!!

I have cut and pasted the relevant portions of text from a script I am
writing in my quest to learn the Python.

Could someone explain the attribution error to me? See the end of the
listing for the error. I have created the Image object(?) as a
wx.StaticBitmap, so whazzamatter.

Thanks for pointers
Steve




class GIP(wx.Frame):
    def __init__(self, parent, ID, title):
        wx.Frame.__init__(self, parent, ID, title, size = (600, 460))

        ....

       self.Image = wx.StaticBitmap(self, -1, wx.EmptyBitmap(*self.thumbSize),
            pos = (160,10))     <<<<<<<<<<<<<<<<<<<<I thunk I dunnit here!

       ....

    def DisplayImg(self, rot):
        self.SetStatusText('Current image: ' + self.jpgList[self.curJpg])
        img = wx.Image(self.jpgList[self.curJpg], wx.BITMAP_TYPE_JPEG)
        if rot == 90:
            img = img.Rotate90()
        elif rot == 180:
            img = img.Rotate(1, (0,0))
        elif rot == 270:
            img = img.Rotate(1.5, (0,0))
        img = self.ScaleImg(img)
        img = wx.BitmapFromImage(img)
        self.Image.SetBitmap(img)      <<<<<<<<<<<<<<<<<<<<<<<Problem
        self.txtFName.Clear()
        filen = self.GetFName(self.jpgList[self.curJpg])
        self.txtFName.WriteText(filen)
        self.txtDirName.SetLabel(self.dirName)


Traceback (most recent call last):
  File "/usr/lib/python2.3/site-packages/sm/scriptutils.py", line 49, in run
    exec codeObject in mainDict
  File "<source>", line 197, in ?
  File "/usr/lib/python2.3/site-packages/wxPython/wx.py", line 1951, in __init__
    _wxStart(self.OnInit)
  File "<source>", line 191, in OnInit
  File "<source>", line 78, in __init__
  File "<source>", line 116, in DisplayImg
AttributeError: GIP instance has no attribute 'Image'


From tchur at optushome.com.au  Thu Jan  8 17:10:58 2004
From: tchur at optushome.com.au (Tim Churches)
Date: 09 Jan 2004 09:10:58 +1100
Subject: What psyco is goot at [Was: Rookie Speaks]
In-Reply-To: <pan.2004.01.08.18.24.09.555980@yahoo.com>
References: <3FFC9855.3070901@lawson.com>
	<pan.2004.01.07.23.38.51.236836@yahoo.com>
	<3FFC9A22.3020507@lawson.com>
	<pan.2004.01.08.00.03.13.66828@yahoo.com>
	<tyfsmiqg1qi.fsf_-_@pcepsft001.cern.ch>
	<pan.2004.01.08.18.24.09.555980@yahoo.com>
Message-ID: <1073599858.1866.66.camel@emilio>

On Fri, 2004-01-09 at 05:25, Samuel Walters wrote:
> |Thus Spake Jacek Generowicz On the now historical date of Thu, 08 Jan
> 2004 11:43:01 +0100|
> 
> > Samuel Walters <swalters_usenet at yahoo.com> writes:
> > 
> >> If you'd like to see an example of both the psyco and profile modules
> >> in action, let me know and I'll give you some more understandable code
> >> that I once wrote to see what types of things psyco is good at
> >> optimizing.
> > 
> > I think this is generally interesting, and would be curious to see it,
> > if you'd care to share.
> 
> Sure thing.  The functions at the top are naive prime enumeration
> algorithms.  I chose them because they're each of a general "looping"
> nature and I understand the complexity and methods of each of them.  Some
> use lists (and hence linearly indexed) methods and some use dictionary( 
> and hence are has bound). One of them, sieve_list is commented out because 
> it has such dog performance that I decided I wasn't interested in 
> how well it optimized.

Out of curiosity I ran your code, and obtained these results:

Fri Jan  9 08:30:25 2004    primesprof

         23 function calls in 2122.530 CPU seconds

...

Fri Jan  9 08:43:24 2004    psycoprimesprof

         23 function calls in -3537.828 CPU seconds

Does that mean that Armin Rigo has slipped some form of Einsteinian,
relativistic compiler into Psyco? I am reminded of the well-known
limerick:

There once was a lady called Bright,
Who could travel faster than light.
She went out one day,
In a relative way,
And came back the previous night.

-- 

Tim C

PGP/GnuPG Key 1024D/EAF993D0 available from keyservers everywhere
or at http://members.optushome.com.au/tchur/pubkey.asc
Key fingerprint = 8C22 BF76 33BA B3B5 1D5B  EB37 7891 46A9 EAF9 93D0


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From swalters_usenet at yahoo.com  Thu Jan  8 12:55:04 2004
From: swalters_usenet at yahoo.com (Samuel Walters)
Date: Thu, 08 Jan 2004 17:55:04 GMT
Subject: Pre-PEP: Dynamically evaluating default function arguments
References: <mailman.164.1073430486.12720.python-list@python.org>
	<pan.2004.01.07.20.57.17.118092@yahoo.com>
	<p14rvv03tvtvbpoqoatfhk2q05obkemcc7@4ax.com>
Message-ID: <pan.2004.01.08.17.53.48.591169@yahoo.com>

|Thus Spake Christos "TZOTZIOY" Georgiou On the now historical date of
Thu, 08 Jan 2004 19:19:57 +0200|
> So, perhaps we should invent a new reply for all wild ideas about Python
> (I've had my share of these :)
> 
> "Thank you for your contribution; your suggestion has been judged worthy
> of inclusion in Python 4k.  Upload your patch to sf.net as soon as Python
> 3k final is released."

It might shorten a few discussions.


-- 
Never forget the halloween documents.
http://www.opensource.org/halloween/
""" Where will Microsoft try to drag you today?
    Do you really want to go there?"""



From jcarlson at nospam.uci.edu  Fri Jan 30 15:46:25 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Fri, 30 Jan 2004 12:46:25 -0800
Subject: Tcp/ip programs in python
In-Reply-To: <mailman.1056.1075488164.12720.python-list@python.org>
References: <bve7n1+b7ud@eGroups.com>
	<mailman.1056.1075488164.12720.python-list@python.org>
Message-ID: <bvefv5$919$3@news.service.uci.edu>

Jp Calderone wrote:

> On Fri, Jan 30, 2004 at 06:27:45PM -0000, M.Dikmen wrote:
> 
>>Do you now a source about socket programming in python? or some source
>>codes, demo programs? i really need them
>>
> 
> 
>   In order of increasing relevance:
> 
>     http://www.google.com/
> 
>     http://www.vex.net/parnassus/
> 
>     http://www.twistedmatrix.com/


I always found http://www.python.org/doc/current/lib/module-socket.html 
to be quite useful for the background and 
http://www.python.org/doc/current/lib/module-asyncore.html for the 
actual implementation.

  - Josiah


From robin at jessikat.fsnet.co.uk  Wed Jan 21 16:20:53 2004
From: robin at jessikat.fsnet.co.uk (Robin Becker)
Date: Wed, 21 Jan 2004 21:20:53 +0000
Subject: Nokia prefers Python
Message-ID: <mKTIlIA10uDAFwGM@jessikat.fsnet.co.uk>

This might be the start of a success story. Says Nokia prefers Python!

http://www.theregister.co.uk/content/64/35040.html
-ringing-ly yrs- 
Robin Becker


From max at alcyone.com  Thu Jan 29 21:24:40 2004
From: max at alcyone.com (Erik Max Francis)
Date: Thu, 29 Jan 2004 18:24:40 -0800
Subject: Python vs. Io
References: <711c7390.0401291301.3f95794@posting.google.com>
Message-ID: <4019C068.9F9DC68F@alcyone.com>

Daniel Ehrenberg wrote:

> Neither the each function nor the map function were built in (Io has
> other mechanisms for that kind of thing, but they are less efficient).
> Can anyone show me how to so much as alias "for" to "each" in Python
> or allow block syntax at all without hacking the C source code?

No, you cannot introduce new special forms (i.e., statement syntax) in
Python without modifying the Python interpreter itself.

There are two major camps in language design.  One says that you should
be able to modify the language itself to your will, and the other says
that this gets rapidly confusing and you shouldn't.  They're simply
different camps, and the two camps won't agree.  Furthermore, the
ability to convert a language from the second camp to the first is not
without difficulty; such things usually have to be designed into the
language from the scratch, or you end up with a very complicated process
of creating hygienic macros.

This is a situation where Io is in the first camp and Python is in the
second.  They simply don't have equivalent goals; Python emphasizes
transparency and readability more than customizability and flexibility,
whereas Io does the opposite.

> Io doesn't use __methods_with_this_annoying_syntax__ because nothing
> is supposed to be for internal use only and there are only about three
> functions that would cause a problem if overridden.
> 
> For embedding, Io doesn't have to use Py_ALL_CAPS, instead it just
> uses IoCamelCase, which looks much better. Interfaces to C are much
> more object oriented.

These are really stylistic objections, as are the other objections you
list below.  That's completely fine, of course; you should choose a
language that jives with your personal sense of language style.  But
language designers need to make decisions, and those decisions are
necessarily going to eliminate some styles of programming, while
emphasizing others.

You're in a situation where it sounds like Io jives with your sense of
style more than Python.  That's perfectly fine, and I know from my own
research that Io is a neat little language (though I haven't really used
it for anything substantial yet).  But you can't expect other languages
to bend to your personal will and personal sense of style, particularly
when it means necessarily violating someone else's corresponding senses.

Io and Python have quite different fundamental approaches to language
design, and so it's not surprising that there are going to be
irreconcilable differences.

-- 
 __ Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
/  \ San Jose, CA, USA && 37 20 N 121 53 W && &tSftDotIotE
\__/ The only completely consistent people are the dead.
    -- Aldous Huxley


From me at here.there.com  Wed Jan 14 22:27:14 2004
From: me at here.there.com (Peter Ashford)
Date: Thu, 15 Jan 2004 16:27:14 +1300
Subject: ProtoCiv: porting Freeciv to Python CANNED
In-Reply-To: <bu4uf4$3ri9$1@netnews.upenn.edu>
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
	<pan.2004.01.14.01.17.00.970198@fakeemail.com>
	<bu2ana$bmpci$1@ID-207230.news.uni-berlin.de>
	<Xns94711BBF5F7D6JanC@213.119.4.35>
	<bu4uf4$3ri9$1@netnews.upenn.edu>
Message-ID: <nMnNb.12331$9k7.233353@news.xtra.co.nz>

paul m wrote:
> JanC wrote:
> 
>>
>> You think "cross-platform" means "it runs out-of-the-box on all 
>> possible platforms that ever existed, now exist, and will ever exist"?
>>
>> Please go searching and come back when you find 1 (one) program which 
>> fits that definition...  :-p
>>
> 
> vi might come close... ;-)

Never!!!

Emacs, on the other hand.... <duck> :)



From eric.brunel at N0SP4M.com  Wed Jan 14 10:36:18 2004
From: eric.brunel at N0SP4M.com (Eric Brunel)
Date: Wed, 14 Jan 2004 16:36:18 +0100
Subject: passing callback function to c-extension
References: <bu3h15$dlk$00$1@news.t-online.com>
Message-ID: <bu3n65$1pk$1@news-reader5.wanadoo.fr>

Diez B. Roggisch wrote:
> Hi,
> 
> I'm currently writing my first c-extension module. First of all: distutils
> and the tutorial for embedding/extending rock! Great work, guys.
> 
> However, I didn't find a hint how to pass a python callback function.
> Googling didn't turn out much useful stuff, so I'd be glad if someone could
> post a hint on how to do this.

A Python function is just a regular Python object, so it is represented at C 
level by a PyObject*. To call it from C, just use one of the PyObject_Call 
functions - see http://www.python.org/doc/current/api/object.html#l2h-189

HTH
-- 
- Eric Brunel <eric dot brunel at pragmadev dot com> -
PragmaDev : Real Time Software Development Tools - http://www.pragmadev.com



From fowlertrainer at anonym.hu  Tue Jan  6 05:30:40 2004
From: fowlertrainer at anonym.hu (fowlertrainer at anonym.hu)
Date: Tue, 6 Jan 2004 11:30:40 +0100
Subject: How to I get the classname of object ?
Message-ID: <3910373245.20040106113040@anonym.hu>

Hello python-list,

  Please help me !!!

  like Delphi's obj.ClassName

  Thanx
  
-- 
Best regards,
 fowlertrainer                          mailto:fowlertrainer at anonym.hu




From mcfletch at rogers.com  Wed Jan 14 04:04:31 2004
From: mcfletch at rogers.com (Mike C. Fletcher)
Date: Wed, 14 Jan 2004 04:04:31 -0500
Subject: Inserting while itterating
In-Reply-To: <pan.2004.01.14.08.43.00.894047@thomas-guettler.de>
References: <pan.2004.01.14.08.43.00.894047@thomas-guettler.de>
Message-ID: <4005061F.3020006@rogers.com>

Thomas Guettler wrote:

>Hi,
>
>Simple excerise:
>
>You have a sorted list of integers:
>l=[1, 2, 4, 7, 8, 12]
>
>and you should fill all gaps:
>
>result == [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]
>  
>
Well, here's the simplest one...
    if l:
        l[:] = range(l[0],l[-1])

but what you're probably looking for is (untested):

for x in range( len(l)-2, -1, -1 ):
    if l[x+1] != l[x]+1:
       l[x+1:x+1] = range(l[x]+1,l[x+1])

Enjoy,
Mike

_______________________________________
  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://members.rogers.com/mcfletch/






From rmkrauter at yahoo.com  Fri Jan 30 13:50:53 2004
From: rmkrauter at yahoo.com (Rich Krauter)
Date: Fri, 30 Jan 2004 10:50:53 -0800 (PST)
Subject: HowTo Search in nested lists 
Message-ID: <20040130185053.7285.qmail@web40110.mail.yahoo.com>

I'm still learning too; this is how I would do it, but
there are probably better ways:

If you require the data structure to be lists, and the
lists are relatively small, this approach is probably
ok -  it returns a list of tuples of indices where the
value is found:

Suppose you were trying to find the location of the
value 5:
a = [1,2,3]
b = [4,5,6]
c = [7,8,9]
t = [a,b,c]
>>> [(x,y) for (x,n) in enumerate(t) for y in
range(len(n)) if n[y] == 5]
[(1,1)]

You can replace the 5 in the above expression with
whatever you want to search for.


If you need to do many look-ups, where you are asking
"Does this value occur at any position in my array?",
and the lists are very, very large, I would consider a
different way using dicts instead of lists; looping
through the lists every time you need to check if a
value is present is not very efficient.

Build up a dict out of the table, using tuples of
indices as keys 
d = {}
d[(0,0)] = 1
d[(1,0)] = 2 
# etc

# build up the "reverse" dict

dd = {}
for k,v in d.items():
     dd.setdefault(v,[]).append(k)


(You can just make dd{} directly from original table
using some other method, without the intermediate step
of making d{}; that step doesn't really provide any
benefit to you, other than allowing you to build up
dd{} using above snippet.)
  
Then you can look up a table value using tuples of
indices as keys to d{}.  Also, you can check for
membership and/or original index locations of a value
by using it as a key to dd{}. The look-up should be
much faster than the list comprehension method for
very large lists.

Rich

__________________________________
Do you Yahoo!?
Yahoo! SiteBuilder - Free web site building tool. Try it!
http://webhosting.yahoo.com/ps/sb/



From http  Sun Jan  4 10:01:14 2004
From: http (Paul Rubin)
Date: 04 Jan 2004 07:01:14 -0800
Subject: Find out username and UID/GID
References: <bt99it$qed$06$1@news.t-online.com>
Message-ID: <7x65frsqpx.fsf@ruckus.brouhaha.com>

Florian Lindner <Florian.Lindner at xgm.de> writes:
> how can I find out the username and it's UID and GID on a linux system,
> using the most recent python version? If possible, without the use of extra
> libraries.

os.getuid(), os.getgid()


From aathan-python-5923 at cloakmail.com  Mon Jan  5 22:11:18 2004
From: aathan-python-5923 at cloakmail.com (Andrew Athan)
Date: Mon, 5 Jan 2004 22:11:18 -0500
Subject: [SOLVED]  RE: Repost: Can't sys.exit() from SIGTERM handler?
In-Reply-To: <NFBBICMEBHKIKEFBPLMCIEIEGPAA.aathan-python-5923@cloakmail.com>
Message-ID: <NFBBICMEBHKIKEFBPLMCOEIFGPAA.aathan-python-5923@cloakmail.com>


Ok, with Jeff's pointer to SystemExit I was able to solve the problem.

Firstly, please ignore the below post which is the result of having missed a
try:except: in the main program, thus having a case where as Jeff suggested,
a "blanket" exception handler was catching the SystemExit silently.

A lesson for other silly pythoners like myself :-)

Thanks again!
A.

PS:  All the complexity below was the result of complex interaction between
the caught and uncaught exceptions, and my own ambiguous debug logs.

-----Original Message-----
From: python-list-bounces+aathan-python-5923=cloakmail.com at python.org
[mailto:python-list-bounces+aathan-python-5923=cloakmail.com at python.org]
On Behalf Of Andrew Athan
Sent: Monday, January 05, 2004 9:35 PM
To: Jeff Epler
Cc: python-list at python.org
Subject: RE: Repost: Can't sys.exit() from SIGTERM handler?



Yes, but it gets stranger (see below).  It seems if I try to catch
exceptions from within the SIGTERM handler, they are instead caught by the
main program.

Perhaps this is because a second signal is raised from within the SIGTERM
handler and python doesn't handle nested signals well?

---------------------------------------------------------
So #1:

But first, the "simple" question:  It seems really onerous to have to
explicitly trap SystemExit and re-raise everywhere in my program, just so I
can make sure that proper exit handlers (atexit(), etc.) are called.  What
is the idiom to "force" and exit while still "properly" shutting down the
interpreter?

----------------------------------------------------------
#2
Now the hard question...

It seems my problem is caused by my atexit() handler.  It is meant to kill
the children, and then os.waitpid() for them to make sure they are dead.  I
added this because killing the python process was not reliably killing the
children (this surprised me since I thought the shell sent the signal to all
processes in a process group??!!!  perhaps cdparanoia has some incorrect
exception handling which causes it not to reliably die on SIGTERM)

I attribute my woes to the atexit() handler because when I changed my code
to explicitly call the function I register with atexit() (called
killChildren()) from within my SIGTERM handler, then the behavior got even
weirder.

The code I have basically looks something like this (pseudocode)

childrenList=[]
def sigterm(a,b):
  killChildren()
  childrenList=[]
  sys.exit()

def sigchild(a,b):
  pass

def killChildren():
  try:
    os.kill(pid,signal.SIGTERM)
    os.waitpid(pid,0)
  pass:
    pass

signal.signal(sigchild,signal.SIGCHILD)
signal.signal(sigterm,signal.SIGTERM)
childrenList.append(fork(...))
sys.atexit(killChildren)
...
while 1:
  try:
    foo=read()
  except Exception,e:
    print 'Here: %s'%e
    pass

If I send a SIGTERM, then I occasionally get 'Here: [Errno 10] No child
processes' printed out!!!

Stranger still, if I leave the normal atexit() handler alone by doing this
instead:

def sigterm(a,b):
  sys.exit()

then *no* exception is printed out and the program keeps running.  I *still*
don't get anything printed even if I explicitly catch SystemExit within the
while 1: loop and print a debug statement.

The only conclusion I can draw is that (a) atexit's exception handling is
strange and/or (b) if the child is still running when I os.kill() it in in
the atexit() handler that occurs after the sys.exit() in, the SIGCHILD that
gets raised as a result of the kill() is interfering in some very strange
way.

HELP! Any comments?

Thanks,
A.

-----Original Message-----
From: Jeff Epler [mailto:jepler at unpythonic.net]
Sent: Monday, January 05, 2004 8:37 PM
To: Andrew Athan
Cc: python-list at python.org
Subject: Re: Repost: Can't sys.exit() from SIGTERM handler?


If I had to guess, I'd bet you had a blanket exception handler
somewhere.  sys.exit merely raises SystemExit, and if this exception
propogates all the way back up, Python treats it specially by exiting
instead of printing the exception's traceback.

:r term.py
import os, signal, time, sys, traceback

def sigterm(a, b):
	print "sigterm"
	sys.exit()

signal.signal(signal.SIGTERM, sigterm)

os.system("(sleep 1; kill %s) &" % os.getpid())

print "Sleeping (should be killed)"

try:
	time.sleep(2)
except SystemExit:
	traceback.print_exc()
	raise

print "sleep finished (!?)"

:r!python -u term.py

Sleeping (should be killed)
sigterm
Traceback (most recent call last):
  File "term.py", line 14, in ?
    time.sleep(2)
  File "term.py", line 5, in sigterm
    sys.exit()
SystemExit


--
http://mail.python.org/mailman/listinfo/python-list




From maketo at gronland.freeshell.org  Fri Jan  9 10:24:06 2004
From: maketo at gronland.freeshell.org (Ognen Duzlevski)
Date: Fri, 9 Jan 2004 15:24:06 +0000 (UTC)
Subject: how to speedup this code?
References: <btmgtp$grr$1@chessie.cirr.com>
Message-ID: <btmh2m$grr$3@chessie.cirr.com>

I forgot to say that I have declared the above matrices as lists of lists or by using the Numeric package as their 
arrays.

Ognen


From quentel.pierre at wanadoo.fr  Thu Jan  8 15:57:19 2004
From: quentel.pierre at wanadoo.fr (Pierre Quentel)
Date: Thu, 8 Jan 2004 21:57:19 +0100
Subject: Strings with null bytes inside sqlite
Message-ID: <btkg7i$eh4$1@news-reader1.wanadoo.fr>

I want to store strings in a sqlite database, but my strings may contain
null bytes and sqlite can't handle this. What is the best way to solve the
problem (the fastest in execution time and / or the one that produces the
least additional bytes) : base64, or is there a better solution ?

Thanks,
Pierre




From mcfletch at rogers.com  Tue Jan  6 04:04:01 2004
From: mcfletch at rogers.com (Mike C. Fletcher)
Date: Tue, 06 Jan 2004 04:04:01 -0500
Subject: tuple.__hash__()
In-Reply-To: <just-443724.09402406012004@news1.news.xs4all.nl>
References: <pan.2004.01.06.08.17.30.910345@thomas-guettler.de>
	<just-443724.09402406012004@news1.news.xs4all.nl>
Message-ID: <3FFA7A01.4020005@rogers.com>

Just wrote:

>In article <pan.2004.01.06.08.17.30.910345 at thomas-guettler.de>,
> "Thomas Guettler" <guettli at thomas-guettler.de> wrote:
>
>  
>
>>Can someone point me to the documentation
>>of tuples __hash__ method?
>>
>>I want to unique a list of tuples. Since
>>__hash__ returns a 32 bit integer, there
>>could be a situtation where two different tupples
>>return the same value.
>>    
>>
>
>That's a basic propery of hashing in general, no?
>  
>
Yes, but the OP is probably worried about whether the dictionary class 
can differentiate between objects which hash equal and equal objects:

 >>> class x:
...     def __hash__( self ):
...         return 32
...    
 >>> a = x()
 >>> b = x()
 >>> d = {}
 >>> d[a] = 1
 >>> d[b] = 1
 >>> d
{<__main__.x instance at 0x0129F828>: 1, <__main__.x instance at 
0x01523BA0>: 1}
 >>> class y:
...     def __hash__( self ):
...         return 32
...     def __eq__( self, other ):
...         if isinstance( other, self.__class__):
...             return 1
...         return 0
...    
 >>> s = y()
 >>> t = y()
 >>> d = {}
 >>> d[s] = 1
 >>> d[t] = 1
 >>> d
{<__main__.y instance at 0x011FCF08>: 1}
 >>>

AFAIK, the dictionary class simply uses the hash to sort into buckets, 
providing fast indexing, before using equality to check whether the two 
keys are equal.  IOW, hashes are an optimisation for lookup, not an 
identity as far as the dictionary is concerned, so the impact of 
key-collisions is pretty low.  The type must guarantee that equal values 
hash equal, but it doesn't have to guarantee that only equal values hash 
equal.

>>Is there a dictionary type which uses __cmp__() like
>>btrees in the standard library?
>>    
>>
>
>I don't think so.
>  
>
Hmm, not in the same way (i.e. not for a binary-search lookup), but 
there does appear to be something going on in the dictionary class that 
does what the OP is probably looking for wrt comparisons.

Happy hashing,
Mike

_______________________________________
  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://members.rogers.com/mcfletch/






From ptmcg at austin.rr.com  Fri Jan  2 10:36:48 2004
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Fri, 02 Jan 2004 15:36:48 GMT
Subject: Array neighbourhoods
References: <mailman.42.1072799018.8134.python-list@python.org>
Message-ID: <kegJb.32453$DC4.619@fe2.texas.rr.com>

"Daniel Pryde" <ababo_2002 at hotmail.com> wrote in message
news:mailman.42.1072799018.8134.python-list at python.org...
> Hi again.
>
> One thing I forgot to include in my post the other day. I was wondering if
> anyone knew of any fast algorithms for returning the surrounding
neighbours
> of an array element, or even the neighbours of a group of array elements.
>
Try this (requires Python 2.3, since it uses sets).  Can't say how fast it
is, but it handles all cases I can think of (edge effects, disjoint cells,
etc.).  Maybe start with this to get going, then make it faster if it needs
to be.


# matrixNeighbors.py
from sets import Set

def neighborhoodOf(cells, rows, cols):
    ret = Set()
    if type(cells) == tuple:
        row,col = cells
        for i in (-1,0,1):
            for j in (-1,0,1):
                ret.add( (row+i, col+j) )
        # remove original cell
        ret.remove( cells )

    elif type(cells) == list:
        for cell in cells:
            for neighbor in neighborhoodOf(cell,rows,cols):
                ret.add(neighbor)
        # remove original cells
        ret -= Set( cells )

    # remove all entries in ret with negative values,
    # or values greater than number of cols/rows
    for x,y in ret.copy():
        if x < 0 or y < 0 or x >= COLS or y >= ROWS:
            ret.remove( (x,y) )

    return list(ret)

# define matrix boundaries
ROWS = 4
COLS = 6

print neighborhoodOf( (0,0), ROWS, COLS )
print neighborhoodOf( (COLS-1,ROWS-1), ROWS, COLS )
print neighborhoodOf( (COLS,ROWS), ROWS, COLS )
print neighborhoodOf( [(0,0),(0,1)], ROWS, COLS )
print neighborhoodOf( neighborhoodOf( (1,1), ROWS, COLS), ROWS, COLS )
print neighborhoodOf( neighborhoodOf( (COLS-1,ROWS-1), ROWS, COLS), ROWS,
COLS )
print neighborhoodOf( neighborhoodOf( (COLS,ROWS), ROWS, COLS), ROWS, COLS )




From rainerd at eldwood.com  Thu Jan 29 12:50:42 2004
From: rainerd at eldwood.com (Rainer Deyke)
Date: Thu, 29 Jan 2004 17:50:42 GMT
Subject: isinstance() bug
References: <mailman.925.1075304492.12720.python-list@python.org><ZnURb.45568$U%5.239709@attbi_s03>
	<mailman.965.1075365481.12720.python-list@python.org>
Message-ID: <SJbSb.182317$na.299752@attbi_s04>

Michal Vitecek wrote:
> Rainer Deyke wrote:
>> Michal Vitecek wrote:
>>>  it's my belief that if i'm instantiating a class from the same
>>>  location no matter how i imported its definition, its instances are
>>>  always of the same class.
>>
>> Your belief is incorrect.  'package.module.A' and 'module.A' are
>> distinct classes.  Modifications to one do not show up in the other.
>> If 'isinstance' reported that an instance of 'package.module.A' is
>> an instance of 'module.A', 'isinstance' would be broken and unusable.
>
>  could you elaborate further why do you consider the current behaviour
>  to be correct? you've only described how it works currently. i'd be
>  interested what's the reasoning behind that.

'isinstance' does the only possible correct thing.  Even without loading the
same file as multiple modules, a module can create many distinct classes
with the same name.  For example:

def create_unique_class():
  class C(object): pass
  return C

a_bunch_of_classes = [create_unique_class() for i in range(8)]

Treating these separate classes as a single class would be just plain wrong.

If there's a problem with the current implementation, it is that it allows
modules in packages to be imported as top level modules.


-- 
Rainer Deyke - rainerd at eldwood.com - http://eldwood.com




From nem at nowhere.invalid  Mon Jan 26 02:56:26 2004
From: nem at nowhere.invalid (Nemesis)
Date: 26 Jan 2004 07:56:26 GMT
Subject: any news client in Python?
References: <2b4c49e0.0401230915.3438810f@posting.google.com>
	<ljhuub.3v1.ln@nemesis.homeinvalid>
Message-ID: <bv2h7a$b64$1@e3k.asi.ansaldo.it>

"Nemesis" wrote: 

>> hello everybody.
>> i've been looking around for a decent newsreader (not rss)
>> that's written in Python. Strange, but i found none so far,
>> i've been to sf.net, freshmeat.net, and even googled that,
>> still nothing interesting.
> I know two newsreader written in Python at least.
> 1) Pyne
> 2) XPN

Aren't they decent newsreaders? :-D

-- 
Testa di Vieri deviata da De Rosa" ( Bruno Longhi) 



From sandhya.hariharan at sap.com  Tue Jan 13 07:21:27 2004
From: sandhya.hariharan at sap.com (sandhya)
Date: Tue, 13 Jan 2004 06:21:27 -0600
Subject: Python
Message-ID: <d88cf0080cd0462d2aab21812a04e09b@localhost.talkaboutprogramming.com>

How to generate a .pyd file from a c++ file??

plz do respond

thanks
regards
Sandhya



From wilkSPAM at OUTflibuste.net  Mon Jan 12 09:34:45 2004
From: wilkSPAM at OUTflibuste.net (Wilk)
Date: Mon, 12 Jan 2004 15:34:45 +0100
Subject: what is best for web development??
References: <f046efac.0401100358.5aa812a0@posting.google.com>
	<87wu80559x.fsf@blakie.riol>
	<f046efac.0401120330.5c2e7c50@posting.google.com>
Message-ID: <87oet9grqy.fsf@blakie.riol>

ketulp_baroda at yahoo.com writes:

> Wilk <wilkSPAM at OUTflibuste.net> wrote in message news:<87wu80559x.fsf at blakie.riol>...
>> ketulp_baroda at yahoo.com writes:
>> 
>> > i am developing a web application and i am really confused on what should i use.
>> > should i use just python and use the cgi module availabe.
>> > Or should i use application like WebWare.Also there is PSP available.
>> > I am really confused and need help
>> 
>> It depends of the kind of application you want to do exactly, there are
>> many possibilities from cgi to zope...
>> 
>> Look into the archive of the list, you'll find a lot of answer to this
>> question. Or describe more what you need.
>> 
>> bye
>
>
> hey thanks for ur reply
> i am developing an issue tracking system 

There is one that you can look at : http://roundup.sf.net
I think it can be used in standalone server or cgi.

> the primary requirements are
> 1)it should be platform independent which i think python will take
> care of
> 2)it should have customizable gui .I am thinking of using templates
> for this like Cheetah. Is there any other better solution to Cheetah?

There is no better solution than Cheetah : there is others solutions...

> The problem i am facing here is i dont know what to use for
> development of the application. I came across many ways to develop web
> application in python which I already specified like
> i)the cgi module in python
> ii)Python Server Pages
> iii)Quixote
> iv)WebWare
> v)Zope etc.
> I want to choose such an environment so that i dont have to install
> other softwares to run my application.For eg. I think if I develop
> using zope then the client also has to install zope to run my software
> and i dont want this.

When you use one of theses servers, you don't need to install anything
else than a classic browser on the client side.
On the server side, most of the servers will not need anything else, you
can even start without server with the batterie include :
BasicHTTPServer (it was somes examples on this list somes days ago).

bye

-- 
Wilk - http://flibuste.net


From michael at telcopartners.com  Fri Jan 23 17:51:31 2004
From: michael at telcopartners.com (Michael Spencer)
Date: Fri, 23 Jan 2004 14:51:31 -0800
Subject: Various strings to dates.
References: <4GfQb.16187$AA6.14368@fed1read03>
	<MFgQb.95539$6y6.1915432@bgtnsc05-news.ops.worldnet.att.net>
	<PRgQb.16209$AA6.9881@fed1read03>
Message-ID: <K4ydna_ey7rvOIzdRVn-jw@comcast.com>

"Amy G" <amy-g-art at cox.net> wrote in message
news:PRgQb.16209$AA6.9881 at fed1read03...
> No it won't.  Unfortunatly I don't necessarily have a comma delimited date
> string.  Thanks for the input though.
>
> The following three date strings is another example of the various date
> formats I will encounter here.
>
> Thursday, 22 January 2004 03:15:06
> Thursday, January 22, 2004, 03:15:06
> 2004, Thursday, 22 January 03:15:06
>
> All of these are essentially the same date... just in various formats.  I
> would like to parse through them and get a comparable format so that I can
> display them in chronological order.
>
>
> "wes weston" <wweston at att.net> wrote in message
> news:MFgQb.95539$6y6.1915432 at bgtnsc05-news.ops.worldnet.att.net...
> > Amy,
> >     I hope there is a better way but, if you go here:
> >
> > http://www.python.org/doc/current/lib/datetime-date.html
> >
> > The new datetime module may help. This and the time mod
> > should get you where you want to go.
> >
> > list     = strdate.split(", ")
> > daystr   = list[0]
> > daynum   = int(list[1])
> > monthstr = list[2]
> > year     = int(list[3])
> > #funct to get a month int is needed
> >
> > d = datetime.Date(y,m,d)
> >
> > wes
> >
> > ---------------------------------------
> >
> > Amy G wrote:
> > > I have seen something about this beofore on this forum, but my google
> search
> > > didn't come up with the answer I am looking for.
> > >
> > > I have a list of tuples.  Each tuple is in the following format:
> > >
> > > ("data", "moredata", "evenmoredata", "date string")
> > >
> > > The date string is my concern.  This is the date stamp from an email.
> > > The problem is that I have a whole bunch of variations when it comes
to
> the
> > > format that the date string is in.  For example I could have the
> following
> > > two tuples:
> > >
> > > ("data", "moredata", "evenmoredata", "Fri, 23 Jan 2004 00:06:15")
> > > ("data", "moredata", "evenmoredata", "Thursday, 22 January 2004
> 03:15:06")
> > >
> > > I know there is some way to use the date string from each of these to
> get a
> > > date usable by python, but I cannot figure it out.
> > > I was trying to use time.strptime but have been unsuccesful thus far.
> > >
> > > Any help is appreciated.
> > >
> > >
> >
>
>

This was asked and answered earlier today

See: https://moin.conectiva.com.br/DateUtil

>>> from dateutil.parser import parse
>>> parse("Thursday, 22 January 2004 03:15:06")
datetime.datetime(2004, 1, 22, 3, 15, 6)
>>> parse("Thursday, January 22, 2004, 03:15:06")
datetime.datetime(2004, 1, 22, 3, 15, 6)
>>> parse("2004, Thursday, 22 January 03:15:06")
datetime.datetime(2004, 1, 22, 3, 15, 6)
>>>





From akhavr at kds.com.ua  Mon Jan 12 13:05:26 2004
From: akhavr at kds.com.ua (Andrey Khavryuchenko)
Date: Mon, 12 Jan 2004 20:05:26 +0200
Subject: script to translate from compiler AST
References: <m3d69qk10i.fsf@netmaster.kds.com.ua>
	<m3u131z7ra.fsf@pc150.maths.bris.ac.uk>
Message-ID: <m3oet9hwk9.fsf@netmaster.kds.com.ua>

Michael,

"MH" == Michael Hudson wrote:

 MH> Andrey Khavryuchenko <akhavr at kds.com.ua> writes:
 >> I'm looking for a script to translate from 'compiler' AST to py source

 MH> google('decompyle')

Well, not *that* :)

 >> and executable code.

 MH> Um, not sure what you're asking for here.  You might be asking for
 MH> Python2C, but it's probably not what you want...

Imagine, I've built an AST that I want to run.  I've not found an easy
(read library) way to do that, hence the question.

Is there a way or I'd better write a proper 'visitor' myself?

-- 
Andrey V Khavryuchenko            http://www.kds.com.ua/
Silver Bullet Software Solutions  http://www.kds.com.ua/training/


From sidharthk at hotmail.com  Fri Jan 30 07:04:30 2004
From: sidharthk at hotmail.com (sid)
Date: Fri, 30 Jan 2004 17:34:30 +0530
Subject: pyc file problem
References: <mailman.1033.1075459544.12720.python-list@python.org>
Message-ID: <bvdh8j$q721o$1@ID-223265.news.uni-berlin.de>

i doubt there are any good name manglers for python.especialy with it being
dynamic.

you could encrypt your game files. of course the loader would have to be
mangled by hand.

if you are keen on this you could look at the tempfile and imp modules.

this is not foolproof. people could still step through your code and crack
it.

just wondering, is it smart to have any of the game's logic on the users
machine. i can see a lot of situations other than hacking and cracking the
code that could lead to problems.




From jacek.generowicz at cern.ch  Wed Jan  7 07:44:57 2004
From: jacek.generowicz at cern.ch (Jacek Generowicz)
Date: 07 Jan 2004 13:44:57 +0100
Subject: metadocumentation (keyword help)
References: <tyfn091gnk5.fsf@pcepsft001.cern.ch>
	<mailman.144.1073405082.12720.python-list@python.org>
	<3ffb0edf$1@nntp0.pdx.net> <tyfhdz8gn8k.fsf@pcepsft001.cern.ch>
	<d69wnik0.fsf@python.net>
Message-ID: <tyfbrpggc6u.fsf@pcepsft001.cern.ch>

I always wonder whether I should post concise articles, or wordy ones,
covering all possbile assumpitons and misconceptions.

It appears that, usually, I get the balance hopelessly wrong :-( Or,
maybe, that's just what life is like in a large public forum; whatever
you say, there will always be hundreds of people who misunderstand you.


Thomas Heller <theller at python.net> writes:

> Jacek Generowicz <jacek.generowicz at cern.ch> writes:
> 
> > Yes, but this actually does not work out of the box (on any of the
> > GNU/Linux, Mac OS X, and even Windoze installaitions I have tried). You
> > get an error message complaining about the absence of HTML
> > documentation and setting PYTHONDOCS. So, to rephrase my question ...
> >
> > Where can I find clear instructions on how to install and configure
> > the Python documentation which is necessary to make the following
> > work:
> >
> >    >>> help('and')
> >
> > ?
> 
> Download the HTML archive from
> <http://www.python.org/doc/current/download.html>, and unpack this in a
> temporary directory.  Leave the directory structure intact - in Winzip,
> make sure the 'Use Folder Names' checkbox is checked.
> 
> This creates a Python-Docs-2.3.3 subdirectory.  Copy everything in this
> directory (including subdirectories) into your c:\python23\Doc folder
> (normally there is a single Python23.chm file in it), and you're done.

Does someone who writes 

> > GNU/Linux, Mac OS X, and even Windoze
                             ^^^^    ^^^^
really look like someone who is looking for instructions on fixing his
Python installation on a M$ operating system ?


Jacek Generowicz <jacek.generowicz at cern.ch> originally wrote:

> Where can I find concise, clear documentation[*] describing what one has
> to do in order to enable Python's internal help to be able to provide
> descriptions of Python keywords ?
> 
> I am in a situation where I have to give Python novices the ability to
> fix this for themselves easily.
> 
> 
> [*] Failing "concise" and "clear", how about "complete and correct" ?

I teach an introductionary course on Python. One of the key messages
that I try to convey is that with Python's excellent introspection
capabilities, the built-in help, and the Python web site, you have
pretty much all the information you need at your fingertips. In the
course, I politely refuse to answer any questions which the student
can easily answer himself by using the interactive help. The point is
that I hope that the studens will go away with the ability to find
most things out for themselves. In this context, I would like them to
be able to find out for themselves how to fix the keyword
documentation, which is why I phrased my original question thus:

> Where can I find concise, clear documentation[*] describing what one
> has to do in order to enable Python's internal help to be able to
> provide descriptions of Python keywords ?

Note, I did NOT say "How do I ...", I said "Where do I find
[...] documentation ...".

I am NOT interested in a recipe posted here. I want to know where to
find the official instructions on how it is done, so that I can show
newbies how to find the information themselves.

"Give a man a fish, and he can eat for a day. Teach a man to fish ...",
and all that.

If these instructions are, as it seems, absent, then I would
appreciate advice on what I can do to make them appear in the
appropriate place, and what the appropriate place might be.

I recognize my impatience with poor documentation as a pathological
flaw in my characer, which is why I am asking for help in
finding/creating this documentation here.


From harry.g.george at boeing.com  Wed Jan 28 03:42:11 2004
From: harry.g.george at boeing.com (Harry George)
Date: Wed, 28 Jan 2004 08:42:11 GMT
Subject: Chart drawing library for Python
References: <6ee58e07.0401280403.3d52a9e0@posting.google.com>
Message-ID: <xqx7jzctqfw.fsf@cola2.ca.boeing.com>

llothar at web.de (Lothar Scholz) writes:

> Hello,
> 
> is there something like "JpGraph" for python ?
> For those who don't know this PHP library: It is a high level
> drawing library that generates gif files with all kind of charts.
> 
> Or (maybe better) is there a C library doing this. I think i 
> read about something like this a while ago.

To generate jpg's and png's (maybe gif's):

binding for plotutils:
http://biggles.sourceforge.net/libplot/

binding for gnuplot:
http://gnuplot-py.sourceforge.net/

gdchart has a python binding (which I can't bring up right now).  Here
is gdchart's own page.
http://www.fred.net/brv/chart/

Also, some people use "R" for fancy charts, and R has a python binding:
http://www.R-project.org/
http://www.omegahat.org/RSPython/index.html

-- 
harry.g.george at boeing.com
6-6M31 Knowledge Management
Phone: (425) 342-5601


From virusmaster at kaptech.com  Thu Jan 29 06:25:35 2004
From: virusmaster at kaptech.com (virusmaster at kaptech.com)
Date: Thu, 29 Jan 2004 11:25:35 GMT
Subject: Virus Alert
Message-ID: <200401291125.i0TBPZX23432@localhost.localdomain>

L'email (contenant le fichier : message.exe) que vous avez envoye
le 01/29/2004 11:25:34 a jean-claude.messmer at cg67.fr
contient le virus WORM_MIMAIL.R et a ete traite par l'action quarantined.
Pour toutes questions, adressez-vous a votre administrateur reseau.
-----------------------------------------------------------------------------
The email (with attached file: message.exe) you sent
on 01/29/2004 11:25:34 to jean-claude.messmer at cg67.fr
contains the virus WORM_MIMAIL.R and the action quarantined had been done.
If you have questions, please contact your LAN administrator.


Cet email a ete genere automatiquement par un serveur anti-virus.
Merci de ne pas repondre a ce message.
This email has been automatically generated by an antivirus server.
Please do not reply to this message.



From bdesth.tagada at tsoin-tsoin.free.fr  Tue Jan 13 17:20:15 2004
From: bdesth.tagada at tsoin-tsoin.free.fr (Bruno Desthuilliers)
Date: Tue, 13 Jan 2004 23:20:15 +0100
Subject: Does anyone else not find the fun in programming...?
In-Reply-To: <bu19ho$j0n$1@news-reader2.wanadoo.fr>
References: <d232c5e.0401130823.27fd26ff@posting.google.com>
	<bu19ho$j0n$1@news-reader2.wanadoo.fr>
Message-ID: <40046a6c$0$19277$626a54ce@news.free.fr>

Rony wrote:
> Group : comp.lang.python
> 
> 
(snip)
> 
> Well I agree...
> Meeting people, having a drink with them, sex.. is 

s/fun/boring/

> Programming is just 
s/a job/fun/

<op> did this help ?-) </op>



From rick_muller at yahoo.com  Thu Jan 22 14:41:18 2004
From: rick_muller at yahoo.com (Rick Muller)
Date: 22 Jan 2004 11:41:18 -0800
Subject: Simple way of turning -DNDEBUG off in distutils
Message-ID: <5eb8fb88.0401221141.35549e53@posting.google.com>

Is there a simple way of toggling the -DNDEBUG flag in the distutils
builds? I just realized that all of my assert statements were being
skipped because by default the distutils put in -DNDEBUG.

Thanks in advance,

Rick


From tim.golden at viacom-outdoor.co.uk  Wed Jan 21 05:34:31 2004
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Wed, 21 Jan 2004 10:34:31 -0000
Subject: personal document mgmt system idea
Message-ID: <F1921F85572CB04D9F55B14BDC76B3E4434638@tdi_nt9.internal.viacom-outdoor.co.uk>

>> In addition, a real (text) search engine might be of help. 
>I'm using swish-e
>> (www.swish-e.org) and are very pleased with it.
>
>Just downloaded it... looks good. Now if it also had a python api (-;

Try this: http://jibe.freeshell.org/bits/SwishE/

TJG


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From usenet at -OBFUSCATED-joefrancia.com  Sat Jan 17 20:04:40 2004
From: usenet at -OBFUSCATED-joefrancia.com (Joe Francia)
Date: Sun, 18 Jan 2004 01:04:40 GMT
Subject: Webbrowser and Mozilla control on linux
In-Reply-To: <1d17eeb7.0401171633.170e313a@posting.google.com>
References: <1d17eeb7.0401171633.170e313a@posting.google.com>
Message-ID: <IYkOb.5841742$Id.943633@news.easynews.com>

Jay Davis wrote:
> I can launch a browser on linux with the webbrowser module
> and the .open() method.  However, I want to be able also to
> control the browser, specifically, I'd like to be able to 
> go to a URL and invoke the automatic form filler and post
> the form, all from within a python script.
> 
> I have google'd around and I see hints that there are remote
> controller objects for some browsers, but so far I haven't
> found any examples of code that controls the browser; most
> examples just open the browser, which I could just as well
> do from os.system(). 
> 
> If anyone can share some samples, or point me to a good
> reference with browser control details, I'd much appreciate
> it.  Thanks!

If all you're trying to do is automatically fill out web forms, you'll 
probably be better off using ClientForm (and possibly ClientCookie) from 
this page:
http://wwwsearch.sourceforge.net/


From tim.one at comcast.net  Tue Jan 20 16:07:37 2004
From: tim.one at comcast.net (Tim Peters)
Date: Tue, 20 Jan 2004 16:07:37 -0500
Subject: New to Python: my impression v. Perl/Ruby
In-Reply-To: <du71xpue3rm.fsf@mozart.cc.tut.fi>
Message-ID: <LNBBLJKPBEHFEDALKOLCGEJKIHAB.tim.one@comcast.net>

[Ville Vainio]
> Ints are objects in python too:
>
> >>> a=1
> >>> a.__lshift__(1)
> 2
>
> Though "sending messages" to int literals is a syntax error.

Nope, it's fine.  If you write

    1.__lshift__(1)

it's *parsed* as a float literal ("1.") followed by an identifier
("__lshift__"), and that's not meanignful syntax.  You could, e.g., do
either of these instead:

>>> (1).__lshift__(1)  # parenthesize the int
2
>>> 1 .__lshift__(1)   # put whitespace between int and dot
2
>>>




From aathan-python-5923 at cloakmail.com  Mon Jan  5 20:22:28 2004
From: aathan-python-5923 at cloakmail.com (Andrew Athan)
Date: Mon, 5 Jan 2004 20:22:28 -0500
Subject: (no subject)
Message-ID: <NFBBICMEBHKIKEFBPLMCKEIAGPAA.aathan-python-5923@cloakmail.com>




I have a python program (snippet below) which does not want to seem to die
when I issue a sys.exit() inside the SIGTERM handler.  The output below is
generated as the result of sending several SIGTERM signals to the process,
as a result of seeing that it had not died.

I don't think this is relevant, but the application has fork()ed a child
process (cdparanoia).  The only thing I can think of is that somehow, there
is an exception occuring inside sys.exit(), otherwise why am I not seeing
the "Did not sys.exit()!?" output?  Could it be that exit() is returning but
that the output fd's are already closed?

Verrry strange...and therefore I'm sure I'm making a brain dead mistake.

Thanks in advance,
A.

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

****SIGTERM*****


****SIGTERM*****

..
****SIGCHILD*****


Ripper output status code: (4314, 15)
4320 /root/postprocess /var/music/ripper/8707620b

****SIGCHILD*****

Error JOB_NODISC in job <__main__.JobHandler instance at 0x8204b24>
4321 /bin/setserial /dev/ttyS0 spd_normal

****SIGCHILD*****



Killing child processes...

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

def sigterm(a,b):
    print '\n****SIGTERM*****\n'
    sys.exit()
    print '\nDid not sys.exit()??!!\n'
    killChildren()
    os._exit(1)
    print '\nDid not os._exit()??!!\n'

def killChildren():
    global childPIDs
    print '\n\nKilling child processes...'
    for pid in childPIDs:
        try:
            print 'Terminating %d'%pid
            os.kill(pid,signal.SIGTERM)
            os.waitpid(pid,0)
        except:
            pass

def child_exit(a,b):
    #childpid, status = os.wait()
    print '\n****SIGCHILD*****\n'
    pass




From bart_nessux at hotmail.com  Thu Jan 15 14:33:18 2004
From: bart_nessux at hotmail.com (Bart Nessux)
Date: Thu, 15 Jan 2004 14:33:18 -0500
Subject: python & mathematical methods of picking numbers at random
Message-ID: <bu6ptu$kjm$1@solaris.cc.vt.edu>

I am using method 'a' below to pick 25 names from a pool of 225. A 
co-worker is using method 'b' by running it 25 times and throwing out 
the winning name (names are associated with numbers) after each run and 
then re-counting the list and doing it all over again.

My boss thinks that 'b' is somehow less fair than 'a', but the only 
thing I see wrong with it is that it is really inefficient and ugly as 
it's doing manually what 'a' does automatically, other than that I think 
the outcome of both methods (25 unique winners from a pool of 225) are 
the same. Anyone disagree with that and if so, please demonstrate how 
'b' isn't as fair as 'a'

count = len(list_of_potential_winners)

a = random.sample(range(count), 25)

b = random.sample(range(count), 1)

Thanks!
Bart



From mlh at furu.idi.ntnu.no  Mon Jan 26 18:35:12 2004
From: mlh at furu.idi.ntnu.no (Magnus Lie Hetland)
Date: Mon, 26 Jan 2004 23:35:12 +0000 (UTC)
Subject: Pyrex and numarray
References: <buh7to$ldk$1@graf.cs.uni-magdeburg.de>
	<pan.2004.01.20.00.09.15.463837@NOTTHISBIT.webone.com.au>
	<buj83b$sop$1@graf.cs.uni-magdeburg.de>
Message-ID: <slrnc1b91g.rn2.mlh@furu.idi.ntnu.no>

In article <buj83b$sop$1 at graf.cs.uni-magdeburg.de>, Marco Bubke wrote:
[snip]

I tried using the set-up with Pyrex, but I'm having trouble
referencing some of the symbols. (I actually put all of it inside the
cdef extern declaration -- maybe I shouldn't have? I couldn't make it
compile otherwise...)

I manage to reference some of the symbols (such as maybelong) but
others trip me up... If I try to define a variable of type
PyArray_Descr gcc crashes, and I'm not sure why. The only thing that
isn't a warning is

  na_wrap.c:43: storage size of `__pyx_v_x' isn't known

If I run import_libnumarray(), Python can't find the symbol. (It does
find libnumarray.so, though.) The same happens when I try to use
NA_InputArray:

  symbol NA_InputArray: referenced symbol not found

Why, oh why? :]

-- 
Magnus Lie Hetland           "The mind is not a vessel to be filled,
http://hetland.org            but a fire to be lighted."  [Plutarch]


From newsgroups at jhrothjr.com  Mon Jan  5 12:36:49 2004
From: newsgroups at jhrothjr.com (John Roth)
Date: Mon, 5 Jan 2004 12:36:49 -0500
Subject: PRE-PEP: new Path class
References: <vvivefh35qjv9a@news.supernews.com>
	<just-CC8B2B.17325205012004@news1.news.xs4all.nl>
Message-ID: <vvj881re348u0c@news.supernews.com>


"Just" <just at xs4all.nl> wrote in message
news:just-CC8B2B.17325205012004 at news1.news.xs4all.nl...
> In article <vvivefh35qjv9a at news.supernews.com>,
>  "John Roth" <newsgroups at jhrothjr.com> wrote:
>
> > I'm adding a thread for comments on Gerrit Holl's pre-pep, which
> > can be found here:
> >
> > http://tinyurl.com/2578q
> >
> > Frankly, I like the idea. It's about time that all of the file
> > and directory stuff in the os module got objectified
> > properly (or at least with some semblance of OO propriety!)
> >
> > In the issues section:
>
> [ snipping those points where I agree with John ]
>
> > 4) Should path expose an iterator for listdir(?)
> >
> > I don't see why not, as long as the path is to a
> > directory.
>
> _An_ iterator, sure, but not __iter__. How about path.listdir()? :)
> __iter__ could also iterate over the path elements, so it's ambiguous at
> least.

I see what you're saying. I'd argue (softly) that iterating over
the directory entries is the natural interpretation, though.

> > 15. Should files and directories be the same
> > class.
> >
> > Probably not. While they share a lot of common
> > functionality (which should be spelled out as an
> > interface) they also have a lot of dissimilar
> > functionality. Separating them also makes it easy
> > to create objects for things like symbolic links.
>
> But what about paths for not-yet-existing files of folders? I don't
> think you should actually _hit_ the file system, if all you're doing is
> path.join().

I agree here. I haven't looked at any of the candidate implementations
yet, so I don't know what they're doing. I'm thinking of a
three class structure: the parent class is just the path manipulations;
it has two subclasses, one for real files and one for real directories.
That way they can not only inherit all of the common path manipulation
stuff, but the developer can instantiate a pure path manipulation
class as well.

There might also be a mixin that encapsulates the stuff that's common
to real files and directories like accessing and changing dates and
permissions.

I'm sure there are use cases that will throw a curve at that structure
as well.


>
> Just




From nuffsaid at phreaker.net  Sun Jan 18 09:45:17 2004
From: nuffsaid at phreaker.net (Nuff Said)
Date: Sun, 18 Jan 2004 15:45:17 +0100
Subject: wxwindows question
References: <mailman.320.1074000727.12720.python-list@python.org>
	<pan.2004.01.13.23.55.15.95014@phreaker.net>
	<pggid1-jb4.ln1@wintermute.g2ctech>
	<pan.2004.01.17.22.31.58.284937@phreaker.net>
	<1h6pd1-788.ln1@wintermute.g2ctech>
Message-ID: <pan.2004.01.18.14.45.16.955657@phreaker.net>

On Sun, 18 Jan 2004 00:10:09 -0200, Jorge Godoy wrote:
> 
> Which widgets you missed there? 
> 

Tkinter: notebook, tree view, printing framework
pyGTK: printing framework
wxWindows: a powerful, 'normal' TextControl (not Scintilla)

- Notebooks exist in some of the Tkinter extensions, but I
  found it easier (deployment etc.) to write my own notebook
  (which is not really good looking but enough for most of
  my purposes). Nevertheless, a notebook and a tree view widget
  should be part of vanilla Tkinter IMHO.
- The TextControl is a good example for what I do not like
  in wxWindows: it is *very* easy to use widgets in wxWindows in
  a standard way; but it is often difficult or impossible to do 
  advanced stuff with these widgets.


> 
> It would be very good if wxPython was more python centric instead of
> trying to be more like wxWindows. But I guess that people who
> prototype in wxPython and then convert some parts (or all) of their
> application to C++ wouldn't like such a change... 
> 
> There's "equilibrium" here, and messing with that would be
> dangerous :-) Another advantage is that wxWindows is already there
> and it works. It would be a shame not to benefit from that. 
> 

I agree. Having wrappers for existing libraries and software is
an important thing and having *prototyping* in mind, one should
not try to make such wrappers as pythonic as possible. (Moreover,
this would make the maintenance of the wrappers more complicated.)

A native GUI toolkit for Python should be something which is
written from scratch (resp. - maybe - a wrapper for a GUI toolkit
written in C).


> 
> Since you mentioned CGIs, don't you like using Python for that? 
> 

I do! For web applications, I normally use CGIs written in Python
resp. ASP.NET (mainly from the Mono project) using Code Behind in C#.
I like both, but unfortunately, I have to maintain a lot of old
CGIs written in Perl, some ASP stuff etc.


Nuff



From paul at prescod.net  Wed Jan 21 11:23:53 2004
From: paul at prescod.net (Paul Prescod)
Date: Wed, 21 Jan 2004 08:23:53 -0800
Subject: calling Pyrex results from C
In-Reply-To: <o3h2e1-24u.ln1@jowls.lairds.org>
References: <f7tvd1-a1o.ln1@jowls.lairds.org>	<20040120172733.GA7666@titan.progiciels-bpi.ca>	<20040120234855.GV22782@jowls>	<mailman.560.1074644320.12720.python-list@python.org>
	<o3h2e1-24u.ln1@jowls.lairds.org>
Message-ID: <400EA799.7080706@prescod.net>

Kyler Laird wrote:

> 
> Pyrex:
> 	cdef public image_file_open(char* image_filename):
> 		return(Image.open(image_filename))
> 
> 	cdef public image_size(image_PIL):
> 		return(Image.size)
> 
> 	cdef public char* string(x):
> 		s = str(x)
> 		return(s)
> 
> my C:
> 	void *im, *im_size;
>         im = image_file_open(input_filename);
>         im_size = image_size(im);
> 	printf("im=%s\n", string(im));
>         printf("im_size=%s\n", string(im_size));
> 
> The first call to string() succeeds but the second one fails.  I
> suspect that I've expected too much of Pyrex again.  Do I need to
> allocate memory, manipulate reference counts or something like
> that?

First, I'd suggest that "integer" is a perfectly good type in both C and 
Pyrex so you shouldn't pass around Python objects representing integers.

Second, you aren't checking the return codes of your functions and C has 
no exception handling, tracebacks, etc. image_size is probably returning 
0 because it is probably throwing an exception because you are asking 
for the size attribute of the Image class rather than the image_PIL object.

You actually would have gotten a Pyrex error on your console if your 
function were defined to return "int" or "void" because Pyrex would KNOW 
that there's no way you are doing exception handling so it would try to 
compensate by printing exceptions to the console. But I wouldn't depend 
on that feature because it doesn't help for functions that really should 
return objects. Better to check your return values.

Once I fix the Image/Image_PIL error your code runs okay on my computer. 
  But you are walking on thin ice and may just be lucky. It is simply 
not possible to work with strings generated at runtime in C without 
worrying about memory allocation sometime. In this case I have the 
strong suspicion that the string() function is either creating and 
destroying a string object and then returning you a pointer to the dead 
object's internal memory buffer (bad news!) or simply losing a reference 
to the (still living) string object: still not a good thing. Eyeballing 
the code I believe the former is the issue. You could check for sure by 
adding some printf's to the generated code to look at __pyx_v_s->ob_refcnt.

Why not let Python do the "print" rather than using "printf".

  Paul Prescod





From matt at pollenation.net  Fri Jan 23 05:22:59 2004
From: matt at pollenation.net (Matt Goodall)
Date: Fri, 23 Jan 2004 10:22:59 +0000
Subject: cgi concurrency approaches?
In-Reply-To: <66s11056aptit3vd2inv3p3r07v95k52ha@4ax.com>
References: <7x7jzjgso7.fsf@ruckus.brouhaha.com>
	<66s11056aptit3vd2inv3p3r07v95k52ha@4ax.com>
Message-ID: <1074853378.32488.3.camel@harold>

On Fri, 2004-01-23 at 10:04, Rene Pijlman wrote:
> Paul Rubin <http://phr.cx at NOSPAM.invalid>:
> >I'm wondering if folks here have favorite lightweight ways of dealing
> >with concurrency in cgi's.  Take a simple case:
> >
> >You want to write a cgi that implements a simple counter.  The first
> >time it's called, it prints "1".  The next time, "2", etc.
> [...]
> >Anyone have some simpler approaches?
> 
> Use mod_python and keep the counter in a Python variable (if the value
> needs not be persistent).
> http://www.modpython.org/

That will only work if you use Apache 2 in threaded mode. Apache 1  and
Apache 2 in forking mode (multiple processes) will have a copy of the
counter object per-process.

Cheers, Matt

-- 
Matt Goodall, Pollenation Internet Ltd
w: http://www.pollenation.net
e: matt at pollenation.net

Any views expressed are my own and do not necessarily reflect the
views of my employer.




From tismer at stackless.com  Mon Jan  5 21:43:11 2004
From: tismer at stackless.com (Christian Tismer)
Date: Tue, 06 Jan 2004 03:43:11 +0100
Subject: Made a huge change to Stackless. Please test!
Message-ID: <3FFA20BF.7070607@stackless.com>

Hi friends,

for the last two+ weeks, I was hacking on the internals
of stackless, in order to make things cleaner, smaller,
more natural and more complete.

This patch is a quite essential refactoring of the internals,
enhancing functionality at the same time. On the other hand,
semantics are almost not touched.

This finally became a redesign of a lot of the machinery.
Especially, frames no longer have f_tstate, and much
more important, frames no longer carry informationabout the
C state.
C state (as C stacks) is now a property of the tasklets.

All tasklets now have a c state by default.

There are trivial cstates and non-trivial cstates.
They are distinguished by the nesting_level.

A trivial cstate is a C state with nesting_level == 0.
This cstate does not need to be saved, since their context
is well-known. It can be replaced by a number of trivial
statements, which realize so-called soft switches almost
an order of magnitude faster.

Non-trivial cstates are those created by C stack switching.
Note that exactly these tasklets are not restartable after
unpickling!

As a major enhancement, the system now keeps track of all
tasklets which are using a non-trivial cstate, ensuring that
all these tasklets will receive a kill() signal if they
do not finish normally before thread termination.

Here the check-in message:
"""
This was by far the largest check-in since months!
f_state variables are removed from frames.
cstack objects are removed from frames.
All cstate is now kept in the tasklets.
Tasklets with serious cstate are now killed
automatically on thread deallocation.
Tasklet soft-switching is now secured against
repeated entry from "outside": A version variable
is tracked, which makes sure that "main" is always
left with the most recent version of initial_stub.

Hey, this was two weeks of fulltime work!
"""

Please, give this code a heavy load of testing!

With a few changes, this should be the code base
for porting Stackless to Python 2.3.3.

cheers - chris

-- 
Christian Tismer             :^)   <mailto:tismer at stackless.com>
Mission Impossible 5oftware  :     Have a break! Take a ride on Python's
Johannes-Niemeyer-Weg 9a     :    *Starship* http://starship.python.net/
14109 Berlin                 :     PGP key -> http://wwwkeys.pgp.net/
work +49 30 89 09 53 34  home +49 30 802 86 56  mobile +49 173 24 18 776
PGP 0x57F3BF04       9064 F4E1 D754 C2FF 1619  305B C09C 5A3B 57F3 BF04
      whom do you want to sponsor today?   http://www.stackless.com/






From here at there.org  Sun Jan  4 16:36:26 2004
From: here at there.org (The_Incubator)
Date: Sun, 04 Jan 2004 13:36:26 -0800
Subject: Scripting C++ Game AI object using Python Generators
In-Reply-To: <Xns94668ADB6F5ADcpl19ghumspamgourmet@62.153.159.134>
References: <bt8tk4$bnu$1@news.service.uci.edu>
	<Xns94668ADB6F5ADcpl19ghumspamgourmet@62.153.159.134>
Message-ID: <bta10v$975$1@news.service.uci.edu>

Yeah, Stackless sounds interesting, and it was used in Eve-Online. At 
this point I'm under the impression that a lot of the specific 
advantages of stackless have to do with distributed applications, where 
you can have lots and lots of remotely instantiated Python objects 
running as separate microthreads, managed by software on your servers, 
with minimal task-switching overhead. My projects is not online 
multiplayer, so I'm not sure if Stackless would have advantages for my 
project above and beyond the generators already in Python, but maybe 
someone else can shed some light on that?

It may be worthwhile for me to get in touch with them regarding my 
project though. Thanks for the suggestion.

Nick

Harald Massa wrote:
> Nick,
> 
> I am not able to understand your request fully (problem on my side, I'm not 
> into Game Programming) ...
> 
> but many of your keywords I heard last time in a talk by Chris Tismer, 
> speaking about http://www.stackless.com/ stacklass Python at Europython in 
> Charleroi.
> 
> Maybe you should look there and maybe send your request directly to him? I 
> saw him demonstrating a large game application with microthreads and 
> generators and whatsoever (I just remember the words :)) )
> 
> Harald


From peter at engcorp.com  Wed Jan 28 09:29:01 2004
From: peter at engcorp.com (Peter Hansen)
Date: Wed, 28 Jan 2004 09:29:01 -0500
Subject: Simple Database Package
References: <8089854e.0401280622.4e145267@posting.google.com>
Message-ID: <4017C72D.D1F763BD@engcorp.com>

Fuzzyman wrote:
> 
> I'm looking to build a simple database application for use on the
> desktop (customer contact and feedback database).
> 
> Anyone able to reccomend a simple module / package I can use...  ?
> I've never done any database work before and am ken to learn - but
> most of the ones I've seen seem to rely on a database engine buit into
> a server.. I need a simple stand alone engine. Of course I could just
> build the functions I need - but that would be a bit of a waste and
> not so extendable........

Metakit?  http://www.equi4.com/metakit.html and http://www.equi4.com/metakit/python.html

-Peter


From martin at v.loewis.de  Sat Jan 10 10:42:05 2004
From: martin at v.loewis.de (=?ISO-8859-15?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 10 Jan 2004 16:42:05 +0100
Subject: LC_MONETARY formatting
In-Reply-To: <pan.2004.01.10.00.01.07.962349@cfconsulting.ca>
References: <pan.2004.01.09.22.19.04.935366@cfconsulting.ca>
	<3FFF38DE.1050603@v.loewis.de>
	<pan.2004.01.10.00.01.07.962349@cfconsulting.ca>
Message-ID: <40001D4D.20609@v.loewis.de>

Colin Fox wrote:

> I can't believe that I'm the first person who ever wanted to print a
> number as a currency value. Why go to the great lengths of what's provided
> in localeconv(), only to leave it up to every single programmer to
> re-implement the solution? What a waste of time and effort!

As Serge points out, C has strfmon. For Python, better start believing
that you are the first person who ever wanted to print a number as a
currency value in a locale-dependent way.

Feel free to contribute patches if you think this should be provided
out of the box.

Regards,
Martin



From paton_lewis at yahoo.com  Wed Jan 28 20:16:43 2004
From: paton_lewis at yahoo.com (Paton J. Lewis)
Date: Thu, 29 Jan 2004 01:16:43 -0000
Subject: Problems with python23_d.lib built with Visual Studio 7.1
Message-ID: <bv9mtr+eatk@eGroups.com>

I built the Python 2.3.3 sources with Visual Studio 7.1 (the 
conversion of the Visual C++ 6 project files appeared to work 
without a hitch). Everything seems fine except when I try to link my 
project with the debug Python library, in which case I get 
unresolved symbols apparently because the Python debug library 
symbol names have been modified in an unexpected fashion. For 
example, the calling code asks for symbol __imp__Py_InitModule4 
(which exists in python23.lib) but python23_d.lib contains 
__imp__Py_InitModule4TraceRefs. Has anyone run into this problem 
before?

Thanks,
Pat




From pln at razzle.Stanford.EDU  Sat Jan 17 02:09:05 2004
From: pln at razzle.Stanford.EDU (Patrick L. Nolan)
Date: Sat, 17 Jan 2004 07:09:05 +0000 (UTC)
Subject: Need to get 8.3 path on Windows
Message-ID: <buan2h$g0e$2@news.Stanford.EDU>

Our python script uses popen to run an application on Windows XP.
The application chokes if the filename given as a command line
argument contains any spaces.  It's happy with the 8.3 shortname 
notation, though.  So given a file with a name like
 c:\Documents and Settings\Joe User\Desktop\My Files\foo.dat
I would like to be able to convert this to
 c:\DOCUME~1\JOEUSE~1\Desktop\MYFILE~1\foo.dat

This would be a fairly simple exercise in text manipulation
except that the number may not always be 1.  If the directory
names are not unique in the first 6 characters, there may
be ~2 etc.

Has this been solved by someone else?  

-- 
*   Patrick L. Nolan                                          *
*   W. W. Hansen Experimental Physics Laboratory (HEPL)       * 
*   Stanford University                                       *


From lsolis at mu.intecsa-inarsa.es  Mon Jan  5 03:23:56 2004
From: lsolis at mu.intecsa-inarsa.es (Luis Solís)
Date: Mon, 05 Jan 2004 08:23:56 GMT
Subject: explicit variable declaration
Message-ID: <wa9Kb.2393503$uj6.5826057@telenews.teleline.es>

Hi
It is possible to declare some variables as int, long... ? , or something
like visual basic option explicit.
In some situations could be usefull.
Thanks




From ark at acm.org  Tue Jan 27 10:54:18 2004
From: ark at acm.org (Andrew Koenig)
Date: Tue, 27 Jan 2004 15:54:18 GMT
Subject: I support PEP 326
References: <mailman.654.1074788734.12720.python-list@python.org>
	<10105bn3bsi63c9@news.supernews.com>
	<e838aa6e.0401261158.513e0389@posting.google.com>
	<bv3t62$mb9$1@news.service.uci.edu>
Message-ID: <KQvRb.120450$6y6.2383917@bgtnsc05-news.ops.worldnet.att.net>

> The issue is that when Min and None are in a sequence that gets sorted,
> you can end up with Minimums and Nones getting interspersed like so:
> [Min, None, Min...]

If Min and None were two different names for the same object, such behavior
would be moot.
However, the following anomalies might then appear:

    >>> None
    None
    >>> Min
    None

(after all, if they're the same object, how is the interpreter to know which
print name to use?)




From guido.schimmels at freenet.de  Tue Jan 13 15:14:21 2004
From: guido.schimmels at freenet.de (Guido Schimmels)
Date: Tue, 13 Jan 2004 22:14:21 +0200
Subject: id3v2 module
References: <pan.2004.01.13.09.12.39.813880@beeznest.NOSPAM.net>
Message-ID: <pan.2004.01.13.20.14.20.783863@freenet.de>

Am Tue, 13 Jan 2004 10:12:40 +0100 schrieb Dusausoy Bruno:

> Hi,
> 
> I'd like to know if there is a third-party module for reading/writing
> id3v2 informations.
> Thanks

http://id3-py.sourceforge.net/


From none at none.com  Tue Jan 20 16:20:44 2004
From: none at none.com (Derek)
Date: Tue, 20 Jan 2004 16:20:44 -0500
Subject: I come not to bury C++, but to praise it...
References: <mailman.337.1074032524.12720.python-list@python.org><bu1uul$cam92$1@ID-46268.news.uni-berlin.de><cu%Mb.47396$8H.99443@attbi_s03><bu3khe$dbm5v$1@ID-46268.news.uni-berlin.de><20040114153516.GA16224@intarweb.us>
	<mailman.448.1074285657.12720.python-list@python.org>
	<bujkec$inl4t$1@ID-46268.news.uni-berlin.de>
	<400D5B8F.8C597B9E@engcorp.com>
Message-ID: <buk63d$iijru$1@ID-46268.news.uni-berlin.de>

"Peter Hansen" wrote:
> > > A traceback is also much less nasty than deciphering a
> > > 1000-character long compiler error message reported in
> > > code that uses a heavily templated library.
> >
> > Absolutely correct.  But remember that ugly
> > template-related compiler error messages are a reflection
> > of current compiler technology, not a fundamental
> > limitation of C++.  I suspect future compilers will make
> > debugging templates much easier.
>
> I believe I heard that claim, almost verbatim, sometime
> I around the last time was actively using C++, which was
> I about a decade ago...

Hmmm.  As late as 1997 I couldn't get consistent template behavior
between BCC, GCC, and MSVC.  To this day most compilers are broken in
some way or other with respect to templates.  Even basic STL
containers like std::vector were often improperly implemented or
incomplete just a few years ago (try GCC 2.95 or VC6 to see what I
mean).  I also don't remember typelists, traits, policies, or other
modern template techniques being popular a decade ago.

My point is that while templates aren't new, their widespread use is.
I'm not surprised that compiler vendors are only now looking at ways
to improve template-related compiler errors.




From pinard at iro.umontreal.ca  Tue Jan 20 12:27:33 2004
From: pinard at iro.umontreal.ca (=?iso-8859-1?Q?Fran=E7ois?= Pinard)
Date: Tue, 20 Jan 2004 12:27:33 -0500
Subject: calling Pyrex results from C
In-Reply-To: <f7tvd1-a1o.ln1@jowls.lairds.org>
References: <f7tvd1-a1o.ln1@jowls.lairds.org>
Message-ID: <20040120172733.GA7666@titan.progiciels-bpi.ca>

[Kyler Laird]

> I realize that the goal of Pyrex is to create a module that can be
> called from Python.

Or vice-versa.  I found Pyrex useful for calling Python modules from
within C programs which were not Python-aware to start with.  You may
even write wholly Pyrex programs.

> I've discovered that as long as everything in the code is cdef-ed,
> I can call Pyrex code from my C code.  If, however, I so much as
> mention anything Pythonish, it segfaults during execution.

There is some magic needed to establish Python context, not much.
Hoping that it will help, here is a template I use when generating
Pyrex main programs. `%(module)s' shall be replaced by the Pyrex module
name, as Pyrex needs to initialise itself.  When Python calls Pyrex,
initialisation occurs automatically at `import' time, but when C
initially calls Pyrex, initialisation should be explicitly launched.



cdef extern void Py_Initialize()
cdef extern void Py_Finalize()
cdef extern void init%(module)s()

cdef extern int main(int argc, char **argv):
    cdef int index, status
    Py_Initialize()
    init%(module)s()
    import sys
    try:
        arguments = []
        for index from 0 <= index < argc:
            arguments.append(argv[index])
        sys.argv = arguments
        result = main_application()
        raise SystemExit, result or 0
    except SystemExit, result:
        result = str(result)
        try:
            status = int(result)
        except ValueError:
            if not result.endswith('\n'):
                result = result + '\n'
            sys.stderr.write(result)
            status = 1
    except:
        import traceback
        traceback.print_exc()
        status = 1
    Py_Finalize()
    return status


-- 
Fran?ois Pinard   http://www.iro.umontreal.ca/~pinard



From gsmith at oxfam.org.uk  Thu Jan 29 11:43:34 2004
From: gsmith at oxfam.org.uk (Graham)
Date: Thu, 29 Jan 2004 16:43:34 -0000
Subject: Pausing python programs
References: <40192a20$0$9389$ed9e5944@reading.news.pipex.net>
	<sT9Sb.111921$cM1.19522974@twister.nyc.rr.com>
Message-ID: <4019374d$0$13349$ed9e5944@reading.news.pipex.net>

Thanks Max.  Big help.
regards




From jzgoda at gazeta.usun.pl  Sun Jan 25 13:10:57 2004
From: jzgoda at gazeta.usun.pl (Jarek Zgoda)
Date: Sun, 25 Jan 2004 18:10:57 +0000 (UTC)
Subject: Unique ID for CD or DVD
References: <69TQb.15674$Le1.6291@newssvr27.news.prodigy.com>
Message-ID: <bv10rg$9qo$1@atlantis.news.tpi.pl>

Hoang <tr at jotsite.com> pisze:

> Does anyone know of an existing algorithm/module for generating a unique ID
> for a given CD or DVD?  This would be something akin to CDDB where a CD is
> recognized based on its content.  I could be wrong, but I think CDDB is just
> based on file size or disk size and this alone is not unique enough.  If the
> solution is in Python, all the better.

I'm pretty sure I saw Python interface for freedb.

-- 
Jarek Zgoda
Unregistered Linux User #-1
http://www.zgoda.biz/ JID:zgoda-a-chrome.pl http://zgoda.jogger.pl/


From jepler at unpythonic.net  Wed Jan 28 16:05:30 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Wed, 28 Jan 2004 15:05:30 -0600
Subject: Best way to compare a list?
In-Reply-To: <7b454334.0401281242.3bd604e6@posting.google.com>
References: <7b454334.0401271739.59267018@posting.google.com>
	<mailman.886.1075263140.12720.python-list@python.org>
	<7b454334.0401281242.3bd604e6@posting.google.com>
Message-ID: <20040128210530.GX18498@unpythonic.net>

What do you mean by a "difference"?  For instance, what are the
differences between these two lists:

[1, 2, 3]
[3, 2, 1]

For some purposes you might want to consider them equivalent, since they
both contain 1, 2 and 3 (one time each) and they contain no other
elements.  Or you might want to say that they differ at element 0 and
at element 2.

And for this list, what are the differences?

[1, 3, 4]
[1, 2, 3, 4]

For some purposes, you might say that they differ at indexes 1, 2, and
3.  For other purposes, you might want to say that the second list has
an extra "2" inserted at position 1, but the lists are otherwise the
same.

Once you define what you mean by "differences", perhaps we can be more
helpful.  But once you define exactly what your problem is, the
algorithm to solve it should be more apparent to you, too!

An answer to the simplest of the questions you may have been asking is
this:
    [a == b for a, b in zip(l1, l2)]
this returns a list with True in the positions where corresponding
elements of l1 and l2 are equal, and False elsewhere.

Jeff



From dietrich at zdome.net  Sat Jan 24 00:44:15 2004
From: dietrich at zdome.net (Dietrich Epp)
Date: Fri, 23 Jan 2004 21:44:15 -0800
Subject: [OPINION] - does language really matter if they all do
	the	samething?
In-Reply-To: <4011C497.1040302@prescod.net>
References: <69A0D4AB81C51447AD6BA387782B8D64093D8A@midl-mail4.etcconnect.com>
	<028FD9F0-4E01-11D8-BB78-0003934ACDEC@zdome.net>
	<4011C497.1040302@prescod.net>
Message-ID: <58587302-4E30-11D8-8FAB-0003934ACDEC@zdome.net>

Please understand, before you read this, that I think Python is the 
most elegant language that looks and feels natural.  My point is that 
there are plenty of programming techniques which aren't natural in 
Python, but are still useful.  I feel Python's strength is that it is 
flexible enough that most patterns that many programmers use day-to-day 
map very easily and naturally into readable Python code.  The problem 
is that often when you use a pattern that doesn't fit the language you 
use, it will be difficult to code, harder to maintain, and behave 
unexpectedly meanwhile.

The rest of the post is dedicated to two examples of patterns which 
don't quite fit into Python, but are used well in some projects written 
in other languages.

On Jan 23, 2004, at 5:04 PM, Paul Prescod wrote:

> Dietrich Epp wrote:
>> ...
>> <abestos>
>> Python seems to take the middle ground.  It's build from a procedural 
>> standpoint, in an environment where most things are objects and some 
>> are functions.  It's not what I'd choose as an example of an object 
>> oriented language.  There are no messages, only function calls, so 
>> you can't capture them.
>
> That's certainly not true. Take a look at how the XML-RPC libraries 
> work. They capture "messages" sent from the program to the proxy 
> object, reify them as XML "messages" sent across the network and then 
> turned back into function calls applied to objects.

Well, I don't mean that you absolutely can't capture a message, but 
it's just not something that's natural in Python the way it is in 
Objective C.  In Objective C, I can create an object which doesn't 
respond to some message "foo".  However, if I send "foo" to the object, 
it gets a chance to respond.  In Python, there is no concept of 
messages.  You would have to override the function that gets an 
object's attribute and create a function for it to return.  You can 
capture function calls, but capturing method calls is a two-step 
process in Python which requires a little bit of magic to implement.

The problem is that I didn't define message.  In python, sending the 
"bar" message to the "foo" object is written as "foo.bar()".  But it 
isn't the same as sending a message, because in Python, it's two steps: 
get the "bar" property of "foo", and call it.

The example of this is at the end of this post.

>> The plus side is that methods behave exactly the same as
>> functions, this makes the language simple and the two ideas 
>> interchangeable.  You can set an object's method to a function.  The 
>> minus side is that the paradigm of sending a message "to" an object 
>> doesn't exist, and anyone coming from Smalltalk or even Objective-C 
>> might miss that and feel constrained (I did).  But if Python were 
>> really object-oriented like that, then it wouldn't have Python's 
>> simplicity any more.
>> </abestos>
>
> I would appreciate an example of something you would do by capturing a 
> message that cannot be done in Python.
>
> I rather wonder if you've illustrated the downside of flitting from 
> language to langauge. You may think you're using a language to 
> capacity without actually doing so. I could be wrong but perhaps even 
> the tasks you turn to Lisp or Perl for may have easy equivalents in 
> Python.

If I wanted to make this personal, I would accuse you of choosing your 
patterns to fit the language rather than vice versa.  Or perhaps no 
useful pattern exists which is difficult in Python and easy in a 
different language?  I love Python too, but it's only one of the tools 
in my box.

Of course, you haven't seen my code, nor I yours.  My most recent Perl 
script was about twenty lines of nothing but regular expressions and a 
couple dictionary operations.  That would have been even less readable 
and writable in Python.  My Lisp project related to an RPG and random 
generation of items.  It had lots of code like the following:

(defun random-sword-magic-power (quality)
   (choose-random-assoc
     quality (poor medium good)
     ((5 0 0) (glows-in-the-dark))
     ((3 3 0) (magically-silent))
     ((1 5 1) (elemental-power (select-random '(earth water air fire))))
     ((0 2 4) (magical-keen-edge))
     ((0 0 2) (append (random-sword-magic-power 'medium)
                      (random-sword-magic-power 'medium)))))

The numbers on the left are probabilities relative to the other 
probabilities in the same column.  So, when generating a random 'poor' 
magic quality of a sword, you have a 5/9 chance of getting 'glow in the 
dark'.  For a 'good' quality, you have a 2/7 chance of getting two 
'medium' qualities instead.  It is difficult for me to imagine how one 
would go about making this function more concise, to me it looks 
downright minimal.  The only thing I could see making it smaller would 
be removing the parentheses, but they would have to be replaced by 
something else such as commas or tabs.

I'm not trying to say that all applications are like my application, 
and I'm not trying to say that my application can't be written in 
Python.  I'm just saying that using macros, a paradigm that Python 
doesn't even come close to supporting, makes reading and writing 
functions like the above a lot easier.  You don't even need to know 
that 'choose-random-assoc' is a macro, you just need to know how to use 
it.  Heck, defun is a macro in Clisp.

I challenge anyone to come up with a better way to express the above 
function in Python.  If I think it's better, I'll write "PYTHON RULZ" 
on my forehead and post a photo on the web.

On Jan 23, 2004, at 5:35 PM, Brian Quinlan wrote:

> Dietrich wrote:
>> Python seems to take the middle ground.  It's build from a procedural
>> standpoint, in an environment where most things are objects and some
>> are functions.
>
> I'd be interested to know why you don't think that functions are 
> objects. I
> would argue that they are because they have attributes, methods, and 
> are
> bound to variables the same way as other Python objects.

I agree that functions are objects in Python.  However, not everything 
in Python is an object.  For example, names are not objects.  In the 
above example, "foo.bar()", neither "foo" nor "bar" are objects, but 
they are references to objects.  In some languages, such as C and Lisp, 
references to objects can be directly manipulated (Lisp has symbols, C 
has pointers).

>> It's not what I'd choose as an example of an object
>> oriented language.  There are no messages, only function calls, so you
>> can't capture them.
>
> You certainly can capture them. Could you demonstrate the Objective-C 
> or
> Smalltalk syntax for doing so? Maybe it is a lot easier in those 
> languages.

In Objective C:

- (void)forwardInvocation:(NSInvocation *)invocation
{
   if ([someOtherObject respondsToSelector:[invocation selector]])
     [invocation invokeWithTarget:someOtherObject];
   else
     [self doesNotRecognizeSelector:[invocation selector]];
}

In Python:

def __getattr__(self, name):
     try:
         return super(this_class, self).__getattr__(name)
     except AttributeError:
         try:
             method = super(this_class, 
self).some_other_object.__getattr(name)
             if iscallable(method):
                 return method
         except:
             pass
         raise

In Python you have to be careful because this won't normally capture 
just method calls, but all attribute accesses.  In a typical 
Objective-C application you'll probably see a lot of places where the 
program sends a message to an object only if the object responds to 
that message.  Let's compare.

In Objective C:

- (void)resetToDefaultSettings
{
   if ([delegate respondsToSelector:@selector(defaultSettingsFor:)])
     [self setSettings:[delegate defaultSettingsFor:self]];
   else
     [self setSettings:someFallbackValue];
}

In Python, first try:

def reset_settings(self):
     try:
         self.set_settings(self.delegate.default_settings(self))
     except AttributeError:
         self.set_settings(some_fallback_value)

But wait!  What if there is an error in 
self.delegate.default_settings() which raises an AttributeError?  It 
might confuse the hell out of a programmer who might go looking for the 
bug in reset_settings(), because it's using the fallback value for some 
odd reason.  So we should reimplement it.

Python, second try:

def reset_settings(self):
     method = None
     try:
         method = self.delegate.default_settings
     except AttributeError:
         pass
     if method:
         self.set_settings(method(self))
     else:
         self.set_settings(some_fallback_value)

If you think this example is contrived, maybe you haven't worked with 
the paradigms used in Objective-C very much.  The example above was 
used dozens of times in a class that I wrote in Objective-C which draws 
a grid to the screen, for example, when it asks itself or its delegate 
what color the grid should be, or the maximum scale allowed.  The 
practice is also used heavily by Apple's Cocoa libraries, which are my 
favorite UI libraries of all time to program with.




From peter at engcorp.com  Wed Jan 28 14:03:44 2004
From: peter at engcorp.com (Peter Hansen)
Date: Wed, 28 Jan 2004 14:03:44 -0500
Subject: Distributing Python programs
References: <4017abb7$0$9394$ed9e5944@reading.news.pipex.net>
	<4017C6EE.E7F1B27@engcorp.com>
	<4017cd62$0$9388$ed9e5944@reading.news.pipex.net>
Message-ID: <40180790.FED25AB8@engcorp.com>

Graham wrote:
> 
> "Peter Hansen" <peter at engcorp.com> wrote in message
> 
> > Yes, we run dozens of machines from a single network installation.
> > Depending on what extensions you need to install (e.g. win32all) you may
> > need to make some small manual adjustments to get it to work, but
> > in essence you can just do a "non-admin" local install, then copy the
> > entire directory tree to the network.
> >
> Peter
> Thanks for this info.  Will this work with Python for Windows?  

Yes, this is specifically with Windows 98.

> I tried what
> you suggested a few days ago but found when I ran a python script it asked
> me for a python.dll which I have found not in the directory tree but in my
> local system32 directory (I have a local Python installation).
> 
> What is significant about the "non-admin" install and how do you do this?

The significance of the "non-admin" install is that it would fix the problem
you just described...

-Peter


From ptkwt at aracnet.com  Mon Jan 19 22:58:49 2004
From: ptkwt at aracnet.com (Phil Tomson)
Date: 20 Jan 2004 03:58:49 GMT
Subject: New to Python: my impression v. Perl/Ruby
References: <mailman.493.1074484056.12720.python-list@python.org>
Message-ID: <bui91p01uu6@enews2.newsguy.com>

In article <mailman.493.1074484056.12720.python-list at python.org>,
Wayne Folta  <wfolta at netmail.to> wrote:
>-=-=-=-=-=-
>
>I've been a long-time Perl programmer, though I've not used a boatload 
>of packages nor much of the tacky OO.
>
>A couple of years ago, I decided to look into Python and Ruby. Python 
>looked OK, but not that different. I did like the indent-as-group idea, 
>which was different. Ruby looked very cool. 

It _is_ very cool.

>But it was impossible to 
>get good documentation. 

It' s not _impossible_.  Check out www.ruby-doc.org, for example.

>It seemed like a Japanese cult with a few 
>western initiates.

You should see us at the Ruby conferences.  We must speak only in haiku 
until we reach the Master level ;-)

>
>Well, MacOS X ships with Perl, Python, and Ruby (and PHP, and ...) so I 
>recently figured I'd try them again. I still find Ruby more intriguing, 
>but I've settled on Python. Why?
>

Don't lose the intrigue. ;-)

>Well, Perl is an expedient measure that (for me) doesn't scale up and 
>has that horrible OO syntax. (So I never used it much.) If you're going 
>to read someone else's Perl, you had better be "in the zone".
>
>A couple of months ago, I'd written a quick Perl script that would 
>"unstick" a co-worker's POP email. The problem is the Windows-based POP 
>server is too stupid to realize a message does not end in CRLF, so it 
>just appends a period then CRLF thinking it's doing well. But the 
>period ends up not being alone on a line, so it's not a valid 
>termination to the message. So their email program hangs waiting for a 
>proper termination. Sigh.
>
>A week ago, the script broke because I hadn't properly accounted for 
>the fact that the user might have hundreds of messages queued up. (I 
>hadn't used a Perl POP package, which might've handled it, but just 
>threw it together myself. Yes, that would've made the Perl code more 
>competitive with the other two solutions.)
>
>So I decided this might be a nice exercise to try Python. And it went 
>together very quickly using Python's POP3 package. Then I decided to 
>try it in Ruby. I think one little portion of the code shows the 
>difference between the two cultures.
>
>The problem is that the message is not properly terminated, so you need 
>to time out and catch that timeout to realize, "hmmm, malformed". In 
>Python I had:
>
>M = poplib.POP3 ('172.16.30.1') ;
>M.user ('foo') ;
>M.pass_ ('bar')
>
>num_mesgs = len (M.list ()[1])
>bad_mesgs = 0
>
>for msg in range (num_mesgs):
>	try:
>		M.retr (msg + 1)
>... blah blah...
>
>How do I get it to time out after 5 seconds and how do I catch that? 
>The online docs are pretty good, but I had to guess that POP3 was built 
>on the socket package. Looking at socket's docs I found the proper 
>command and exception. I had to include:
>
>socket.setdefaulttimeout (5.0)


>
>before the POP3 commands to set the default socket timeout to 5 
>seconds. And
>
>except socket.timeout:
>
>is the proper way to catch the timeout. Both of these things are in the 
>socket documentation.
>
>Contrast this with Ruby. The Ruby docs are less complete, but they did 
>mention that POP was subclassed from protocol and you'd have to look at 
>protocol's source to see how it works. Looking through protocol, I 
>figured out what to do and it was more elegant.
>

Um hmmm...

A quick google for: Net::Protocol Ruby revealed several hits.
Although, I'll admit, I didn't find the Net::Protocol class covered in the 
Pickaxe book.

>The protocol class had a read_timeout, but since Ruby's mantra might be 
>said to be "Real OO", the POP code had been written such that you could 
>say
>
>pop.read_timeout = 5

So what's the problem?

>
>after the POP open and it set the timeout for that pop connection to 5 
>seconds. Almost as if POP passed the read_timeout upstream to socket 
>automatically. (I don't think Ruby does, but it's coded to look that 
>way.)

Did it or didn't it?  You never really say what happened with the Ruby 
code.

>
>My experience is limited, but it feels like this example gives a good 
>feel for the two languages. Python was better documented and things 
>came together quickly. Ruby ultimately had a more elegant solution, but 
>was more poorly documented. This echoes the mantras: Python's is 
>"Batteries Included", while Ruby's might be "Real OO".

Ok, so you basically had to read the code and then you got it working, or 
no?

>
>On a personal note, I usually prefer an elegant solution, but when the 
>language goes so far as to consider
>
>0.step(360, 45)
>
>to be reasonable, my head hurts. I know there's syntactic sugar so I 
>don't have to code like that. I know everything's an object. But, 
>dammit, a constant integer is an integer with constant value and 
>causing it to iterate is a step too far.

Different strokes for different folks, I guess.  I remember that one of 
the first things I saw about Ruby was that even interger literals were 
objects that can receive messages and thinking how wonderful that was.
As you say, you're not forced to do things this way - you can use 'for' 
for example, but:

   10.times do something end 

is somehow so clear.  It's almost zenlike.

;-)



Phil


From amitgaur at yahoo.com  Sat Jan 24 09:56:16 2004
From: amitgaur at yahoo.com (Amit Gaur)
Date: Sat, 24 Jan 2004 06:56:16 -0800 (PST)
Subject: Changing endian format
Message-ID: <20040124145616.34640.qmail@web41306.mail.yahoo.com>

Hi newbie to python here,
I have a binary file and i need to change the endian format..little to big as well as vice versa..could anyone help me out.
thanks
 


---------------------------------
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From fumanchu at amor.org  Wed Jan 21 01:02:08 2004
From: fumanchu at amor.org (Robert Brewer)
Date: Tue, 20 Jan 2004 22:02:08 -0800
Subject: PyTime Object and Application Crashing
Message-ID: <DE1CF2B4FEC4A342BF62B6B2B334601E561C44@opus.amorhq.net>

Ryan Scott wrote:
> When I run a query against an access database and the default 
> date for 
> my date/time field is 12/30/1899 the application crashes. 
> Changing this 
> to a different date like 03/03/2003 works.
> The output of the query when returned as a list is as follows:

AFAICT all dates on or before that date will crash. You have several
options:

1. Cast the date value to a string in your SQL before retrieving values;
then parse.
2. Store dates as strings altogether avoiding Access date fields.
3. Access the date value as a float, not a PyTime:

# 12/30/1899, the zero-Date for ADO = 693594
zeroHour = datetime.date(1899, 12, 30).toordinal()

if value is None:
    return None
else:
    aDate, aTime = divmod(float(value), 1)
    aDate = datetime.date.fromordinal(int(aDate) + zeroHour)
    hour, min = divmod(86400 * aTime, 3600)
    min, sec = divmod(min, 60)
    aTime = datetime.time(int(hour), int(min), int(sec))
    return datetime.datetime.combine(aDate, aTime)

HTH!

Robert Brewer
MIS
Amor Ministries
fumanchu at amor.org



From usenet at mail-2-me.com  Sat Jan 31 15:20:15 2004
From: usenet at mail-2-me.com (Dirk Hagemann)
Date: Sat, 31 Jan 2004 21:20:15 +0100
Subject: Running External Programs from Within Python
In-Reply-To: <5a40bf6a.0401311123.4b7f783f@posting.google.com>
References: <5a40bf6a.0401311123.4b7f783f@posting.google.com>
Message-ID: <bvh2mf$u7e$07$1@news.t-online.com>

Bob=Moore wrote:
> I'm considering making the transfer from Rexx to Python as a scripting
> language, but there's one thing I can do in Rexx that I can't seem to
> do in Python: run an external program.
>  
> Suppose I have a Tkinter GUI and I want to just push a button and run
> the Windows utility notepad.exe.  Or push another button and run one
> of my old Rexx programs.
>  
> Basically I want to send a command line to Python and have it run that
> command line as if I'm sending it to the Windows command-prompt, an
> MS-DOS window, or clicking on an appropriate program icon.
>  
> Can I run (call? exec? eval?) an external program from inside a Python
> program?
> 
> I have checked the FAQ and documentation.
>  
> Thanx,
>  
> Bob=Moore

Hi Bob!

That is very easy: popen()
Check the FAQ and documentation again for popen.

Regards
Dirk


From rupole at hotmail.com  Wed Jan 14 05:53:17 2004
From: rupole at hotmail.com (Roger Upole)
Date: Wed, 14 Jan 2004 02:53:17 -0800
Subject: catching msie NewWindow2 event
References: <bu146d$66p$1@news.atman.pl>
Message-ID: <4004f195_2@127.0.0.1>

You have to return the out parameters.
Try adding
      return ppDisp,True
  to the bottom of OnNewWindow2.

      Roger

"mic" <aldo123 at onet.pl> wrote in message news:bu146d$66p$1 at news.atman.pl...
> I'm trying to catch the MSIE NewWindow2 event using win32com interface.
The
> code I use is basically something like below:
>
> from win32com.client import DispatchWithEvents
>
> class Events:
>     Browser = None
>     def OnNewWindow2(self, ppDisp, Cancel):
>         #catching the new window and trying to place it onto my own
>         ppDisp = Events.Browser
>         #Cancel = True - this doesn't work either (should prevent popup
from
> opening)
>
> ie1 = DispatchWithEvents('InternetExplorer.Application', Events)
> ie2 = DispatchWithEvents('InternetExplorer.Application', Events)
> Events.Browser = ie2
> ie1.Navigate('http://jaak.sav.net/test.html') #url to the html document
that
> opens its own window
>
> I know that setting ppDisp value should work (at least I've seen it
working
> in C# code) but using it this way gives no results. What's more depending
on
> the url I use the event is triggered or not (other standard events work
> okay). I've seen ctypes COM implementation demo that makes similiar things
> but it looks so much more complicated than win32com api. Hope somebody has
> some insight on that...
>
> Regards,
>
> Michal
>
>




From theller at python.net  Tue Jan 20 06:16:10 2004
From: theller at python.net (Thomas Heller)
Date: Tue, 20 Jan 2004 12:16:10 +0100
Subject: interface to win job scheduler portable from win98 .. winXP /
 cmdline or COM ?
References: <mailman.536.1074589511.12720.python-list@python.org>
Message-ID: <r7xuna4l.fsf@python.net>

Tim Golden <tim.golden at viacom-outdoor.co.uk> writes:

>>From: Robert [mailto:k.robert at gmx.de]
>>
>>I found the os.popen("AT /?") way ....  however it works not on Win98
>>and the "Day" you enter at the AT are language dependent.
>>(e.g. Mi(ttwoch) in german, We(dnesday) in english Windows versions)
>>
>>I need a solution work from Win98..WinXP most independent from
>>internationalization etc.
>>
>>is there portable way - or at all a way to manipulate the Win98/ME
>>scheduler ?  if no simple means, even COM stuff would be ok.  any
>>pointers?
>>
>
> WMI looks like it covers it, but only NT4 / Win2K / XP.
> Oh, sorry, I've just realised: the Win32_ScheduledJob 
> actually refers to the AT service (despite the name!)
>
> If you're really looking for something which will work
> across every version of Windows, I think you're better
> off doing something entirely Python from the start. It
> shouldn't be hard (he says, having not tried it himself). 
> The advantage is: it will work everywhere and you have 
> complete control over it. The disadvantage is: you have 
> to create your own interface and deal with whatever 
> issues the existing mechanisms have already dealt with.

I'll second that this is most certainly the easiest solution.

There seems to be, however, a COM interface to the Task Scheduler, using
all custom interfaces:

<http://msdn.microsoft.com/library/default.asp?url=/library/en-us/taskschd/taskschd/task_scheduler_start_page.asp>

As usual, the docs aren't that crystal clear, but I get the impression
that it's even available in win 95, provided that IE4 is installed.

Thomas


From jsbenson at bensonsystems.com  Mon Jan 19 11:46:52 2004
From: jsbenson at bensonsystems.com (John Benson)
Date: Mon, 19 Jan 2004 08:46:52 -0800
Subject: time module question
Message-ID: <001401c3deab$d7c2d630$210110ac@jsbwxp3>

I display a little date and time (down to the seconds) in my Tkinter GUI
using Twisted internet sockets and ask Twisted to call a routine the
rerequests itself every second. That routine also updates the clock display,
so when I can see the seconds counting up, I know that the main event loop
isn't frozen for whatever reason. This is not time module functionality, but
event scheduling within Twisted. Tkinter also has this capability of calling
a function of your choice at some point in the future.

This rather handily replaced an older, more paranoid version in which I
logged a "heartbeat" message every so often to convince myself that all was
well.


Message: 5
Date: Mon, 19 Jan 2004 05:12:39 GMT
From: Jeff Seale <jseale18 at insightbb.com>
Subject: time module question
To: python-list at python.org
Message-ID: <Xns94752211F12jseale18insightbbcom at 204.127.204.17>

How would one go about writing a program which included a clock that
updated itself? Right now I'm able to display the time in a text widget in
the window but I can't get it to update.







From scrutinizer at gmx.at  Sat Jan 31 08:07:08 2004
From: scrutinizer at gmx.at (Francesco)
Date: Sat, 31 Jan 2004 14:07:08 +0100
Subject: ANN: wxPyAtol
Message-ID: <01an10pfhlrt12iijnid8of3qot3o92uki@4ax.com>

(sorry, if this is also posted in comp.lang.python.announce, but 
i couldn't see the message)

Hello, I'm happy to announce "wxPyAtol"

The original program is written by Miroslav Rajcic and is called Atol
Filemanager.
It is programmed in C++ using wxWindows
http://atol.sourceforge.net/

I have posted the sources to:
http://berg.heim.at/anden/421194/wxpyatol.zip
A few months ago, i couldn't imagine, that this is possible to do in
python + wxpython. But also with the help of win32 extensions, I
managed to get the most things work.

I know, it is almost not at all "pythonic",
but I wanted to keep it so, because it is better to compare
to the c++ sources, and maybe later, I will inlude more python
style.

Maybe someone could help me and give me some pointers:
In the source, it is marked with todo.
for example to retrieve the imagelist from Windows fileextensions
self.m_hImageList = windll.shell32.SHGetFileInfo('.txt',
win32file.FILE_ATTRIBUTE_NORMAL, byref(shfileinfo),
sizeof(shfileinfo), dwFlags)
How can I get this in python?

thank you and best regards (and sorry for my bad english)
-- 
Francesco


From sombDELETE at pobox.ru  Sun Jan  4 19:20:36 2004
From: sombDELETE at pobox.ru (Serge Orlov)
Date: Mon, 5 Jan 2004 03:20:36 +0300
Subject: Creating a capabilities-based restricted execution system
References: <LmmdnUn4seDeGWuiXTWc-w@speakeasy.net> <bt788l$1pej$1@nadya.doma>
	<d7ycncKp5rket2qiXTWc-g@speakeasy.net> <bt7i9i$236v$1@nadya.doma>
	<srudnTjvU9BOH2qiRVn-uA@speakeasy.net> <bta3hv$17s1$1@nadya.doma>
	<mvScnSDrma66AWWiXTWc-g@speakeasy.net>
Message-ID: <btaakg$1dul$1@nadya.doma>


"Sean R. Lynch" <seanl at chaosring.org> wrote in message news:mvScnSDrma66AWWiXTWc-g at speakeasy.net...
> Serge Orlov wrote:
> > "Sean R. Lynch" <seanl at chaosring.org> wrote in message news:srudnTjvU9BOH2qiRVn-uA at speakeasy.net...
> >
> > Thinking about str.encode I conviced myself that global state shouldn't
> > be shared by different security domains so that means codecs.py and
> > __builtins__ must be imported into each security domain separately.
> > It's pretty easy to do with codecs.py since it's python code. But importing
> > __builtins__ more than once is pretty hard since it wasn't designed
> > for that.
>
> Global *mutable* state shouldn't be shared, AFAICT.

Right, I missed this simple rule. My mind is still confined by my recent
attempt to add security by only translating bytecode without any changes
to the interpreter.

> I believing making
> sure no mutable state is reachable through __builtins__

Are you going to create multiple __builtins__ or you're just going
to get rid of any global objects in __builtins__? The first lets you
handle str.encode the right way.

> and having a new
> globals dict for each security domain should be enough. Any modules that
> are imported would need to be imported separately for each domain,

Can C modules be imported more than once in CPython?

> which
> should be possible with a modified __import__ builtin. I don't have any
> intention of allowing import of unaudited C modules.

Agreed.

-- Serge.




From CGStartup at earthlink.net  Sat Jan 31 11:07:49 2004
From: CGStartup at earthlink.net (Stan Schwartz)
Date: 31 Jan 2004 08:07:49 -0800
Subject: Programmers Wanted for Computer Graphics Startup Near Philadelphia
Message-ID: <2da21d6c.0401310807.671be3b7@posting.google.com>

My name is Stan Schwartz, and I'm a University of Pennsylvania 
Ph.D. and an independent inventor.  I'm submitting two computer 
graphics patents to the USPTO during the next several weeks.  
Technologies derived from these patents have application in 
several different market segments, including still image 
photomanipulation, movie special effects and post-production,
web animation, and video games.  I'm developing and marketing one 
or more of the applications through a startup company.  I've 
produced demo output that clearly demonstrates the viability of 
my approaches, which I've been showing to potential licensees and 
investors.  This demo output is currently being generated through 
a loosely connected series of scripts.  To be productized the 
scripts will need to be recoded into standalone "industrial 
strength" applications that are much faster, bullet-proof, 
and that have slick GUIs.  I'm looking for a lead/senior 
programmer to participate in and organize the implementation
side of the startup and probably one or more junior programmers.  
Successful candidates for the programming team should have some 
to many of the following skills/characteristics:


Extensible knowledge of/comfort with math, as exemplified by one 
or more of:
    Computer vision training/experience - feature location/
    extraction, motion estimation, object recognition;
    Image processing training/experience - you know what a
    convolution kernel is; you've implemented a morphing 
    algorithm;
    Linear algebra training/experience - matrix manipulation,
    familiarity with numeric computation packages, such as 
    Numerical Python, or equivalent;
    Art/math programming play, mathematical visualization;
3D modeling, especially for character animation, especially if 
you've hacked/manipulated low-level 3D data representations in a 
variety of formats;
GUI design/building, graphic design training a plus;
Analysis of algorithms;
C/C++, Linux/Unix a plus;
(Note that I did most of the scripting mentioned above in
Python through PIL and Numerical Python and would consider
doing as much as we can of this in Python.)
Startup and/or major fielded product development experience 
required for the lead/senior programmer, a plus for juniors;
Within commuting distance of Philadelphia - we may move and/or 
outsource, but this is where/how we'll start;
Relevant educational background is a plus, but I'm more 
interested in what you can demonstrate to me that you know, can 
do, and have done, than what you've formally studied;
Intellectual flexibility, creativity, and ability to work and 
brainstorm collaboratively;
Open-ended time commitment - After growing this, I have 
additional ideas in the queue that could be spun off into future 
products; and
Demonstrable artistic skills and training in figurative painting, 
sculpture, and/or life-drawing are a plus.


We have access to seed capital, and we'd prefer if participants 
accept some portion of salary as equity in our venture.  If 
you're interested in participating, send me a cover letter and 
resume at cgstartup at earthlink.net.  I'm willing to show you the 
demo and provide more details about the technology, although 
first you'll have to sign a non-disclosure agreement.  The demo 
can also be posted temporarily to the web for online viewing, 
accompanied by an explanatory phone call.  


For Investors/Licensees:
If you're a potential investor in the startup or a representative 
of a company that is potentially interested in licensing one of 
the applications and are interested in seeing the demo and 
hearing a description of the technologies, also under conditions 
of non-disclosure, please let me know through the means described 
above.


Thanks for your time,
Stan


From rkern at ucsd.edu  Sun Jan 18 18:20:52 2004
From: rkern at ucsd.edu (Robert Kern)
Date: Sun, 18 Jan 2004 23:20:52 GMT
Subject: Fw: PDF library for reading PDF files
In-Reply-To: <100luvhbh3vr75d@corp.supernews.com>
References: <mailman.464.1074430854.12720.python-list@python.org>
	<Xns9474CBDE9B2D7cpl19ghumspamgourmet@62.153.159.134>
	<100luvhbh3vr75d@corp.supernews.com>
Message-ID: <oxEOb.96911$Vs3.36407@twister.socal.rr.com>

Cameron Laird wrote:
> In article <Xns9474CBDE9B2D7cpl19ghumspamgourmet at 62.153.159.134>,
> Harald Massa  <cpl.19.ghum at spamgourmet.com> wrote:
> 
>>>I am looking for a library in Python that would read PDF files and I
>>>could extract information from the PDF with it. I have searched with
>>>google, but only found libraries that can be used to write PDF files. 
>>
>>reportlab has a lib called pagecatcher; it is fully supported with python, 
>>it is not free.
>>
>>Harald
> 
> 
> ReportLab's libraries are great things--but they do not "extract
> information from the PDF" in the sense I believe the original
> questioner intended.  

No, but ReportLab (the company) has a product separate from reportlab 
(the package) called PageCatcher that does exactly what the OP asked 
for. It is not open source, however, and costs a chunk of change.


From NAVMSE-INVESTORS_FS1 at alliedcalifornia.com  Fri Jan 30 15:39:48 2004
From: NAVMSE-INVESTORS_FS1 at alliedcalifornia.com (NAV for Microsoft Exchange-INVESTORS_FS1)
Date: Fri, 30 Jan 2004 12:39:48 -0800
Subject: Norton AntiVirus detected a virus in a message you sent.  The inf
	ected attachment was deleted.
Message-ID: <7B3B51FA0493D311B3720090278D3B9637FA2A@INVESTORS_FS1>

Recipient of the infected attachment:  Bob Conrad\Inbox
Subject of the message:  HELLO
One or more attachments were deleted
  Attachment document.zip was Deleted for the following reasons:
    Virus W32.Novarg.A at mm was found.
    Virus W32.Novarg.A at mm was found in document.htm
.scr.
-------------- next part --------------
A non-text attachment was scrubbed...
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From guido at python.org  Mon Jan 26 11:57:44 2004
From: guido at python.org (Guido van Rossum)
Date: Mon, 26 Jan 2004 08:57:44 -0800
Subject: PyCon Reminder: Early bird reg deadline 2/1
Message-ID: <200401261657.i0QGviR22138@c-24-5-183-134.client.comcast.net>

Info
----

This is a reminder that the deadline for early bird registration for
PyCon DC 2004 is February 1, 2004.  Early bird registration is $175;
after that, it will be $250 through March 17, then $300 at the door.
(Note that a week ago I announced the wrong prices for non-early
bird. :-)  To register, visit:

    http://www.pycon.org/dc2004/register/

Plug
----

PyCon is the most important conference in the year for me.  It brings
together the largest group of Python users and developers imaginable.
I come to PyCon for many reasons: to meet with other core Python
developers face to face; to hear about the exciting things that users
from all over the world are doing with Python; to interact in person
with Python users of all types, from newbies to veterans of many
years; to hear everybody's feedback on where Python is and where
they'd like it to go; and perhaps most of all to continue to encourage
this wonderful community by my presence, words and actions to grow,
reach out to new users of all kinds, and keep listening to each other.

I hope everyone who comes to the conference will return from it with a
new or renewed feeling of excitement about Python, whether they are
developers, sophisticated users, beginners, or even skeptical
passers-by.  The Python community includes everyone, from grade
schoolers just learning about computer science to renowned scientists
interested in using the best tools and business people looking for a
secret weapon.

I'm looking forward to seeing you all at PyCon!

Background
----------

PyCon is a community-oriented conference targeting developers (both those
using Python and those working on the Python project).  It gives you
opportunities to learn about significant advances in the Python
development community, to participate in a programming sprint with some
of the leading minds in the Open Source community, and to meet fellow
developers from around the world.  The organizers work to make the
conference affordable and accessible to all.

DC 2004 will be held March 24-26, 2004 in Washington, D.C.  The keynote
speaker is Mitch Kapor of the Open Source Applications Foundation
(http://www.osafoundation.org/).  There will be a four-day development
sprint before the conference.

We're looking for volunteers to help run PyCon.  If you're interested,
subscribe to http://mail.python.org/mailman/listinfo/pycon-organizers

Don't miss any PyCon announcements!  Subscribe to
http://mail.python.org/mailman/listinfo/pycon-announce

You can discuss PyCon with other interested people by subscribing to
http://mail.python.org/mailman/listinfo/pycon-interest

The central resource for PyCon DC 2004 is
http://www.pycon.org/

--Guido van Rossum (home page: http://www.python.org/~guido/)



From prtk3 at yahoo.com  Thu Jan 29 00:06:25 2004
From: prtk3 at yahoo.com (PT)
Date: 28 Jan 2004 21:06:25 -0800
Subject: mod_speling for python
Message-ID: <9d1c4d6d.0401282106.d69b2c5@posting.google.com>

Hi,
  I'm not looking to get into a debate about case-sensitive vs.
insensitive programming languages,
but I was looking for suggestions about how it might be possible to
add a hook to the python parser similar to the Apache mod_speling
module (links below).  So that for example if there is a NameError
exception, python walks the globals() and locals() to see if it might
be just a minor spelling/capitalization error.

I can see how this might be done for ImportErrors, using ihooks or iu,
but I don't see how to do it for NameErrors. The python compiler
module doesn't seem to be the answer.

I know there are drawbacks, disadvantages, this is "evil", etc.  I
only wanted to know what ways there are to add such a hook if it is
possible without altering the C source for python itself.

Possible End-User Solution A:
  Simply add an "import spelling" to a python file to enable
spell-checking, sort of like how you use the psyco module (speaking of
which, how many times have you misspelled that).

Possible End-User Solution B:
  Create an alternative executable that wraps the python interpreter. 
This wrapper may or may not have to use its own source code parser,
like the unreleased mobius-python project.

http://httpd.apache.org/docs/mod/mod_speling.html
http://lxr.webperf.org/source.cgi/modules/mappers/mod_speling.c
http://www.mcmillan-inc.com/importhooks.html
http://www.python.org/doc/current/lib/module-compiler.html
http://sourceforge.net/projects/mobiuspython


From exarkun at intarweb.us  Tue Jan 27 10:10:10 2004
From: exarkun at intarweb.us (Jp Calderone)
Date: Tue, 27 Jan 2004 10:10:10 -0500
Subject: print format for binary representation
In-Reply-To: <6f03c4a5.0401270700.713a73aa@posting.google.com>
References: <6f03c4a5.0401270700.713a73aa@posting.google.com>
Message-ID: <20040127151009.GA16950@intarweb.us>

On Tue, Jan 27, 2004 at 07:00:23AM -0800, Rim wrote:
> Hi,
> 
> >>> print '%x' % 54
> 36
> >>> print '%b' % 54
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> ValueError: unsupported format character 'b' (0x62) at index 1
> >>>
> 
> No formating string for binary? There %x for hex. Would %b make sense
> for bin? Is this worth a PEP?
> 
> How do I get 00110110 printed instead of the traceback?

  Oft requested, oft rejected.  Defining binary() is about one line of code. 
Hex is supported because printf(3) supports it.

  Here's a version to toy with:

  binary = lambda i, c = (lambda i, c: i and (c(i >> 1, c) + str(i & 1)) or ''): c(i, c)

  Jp




From donn at drizzle.com  Sat Jan 24 01:45:02 2004
From: donn at drizzle.com (Donn Cave)
Date: Sat, 24 Jan 2004 06:45:02 -0000
Subject: Seem to be having trouble with Python/Bethon.
References: <PM0003D18B88B36E37@x1-6-00-a0-c9-e7-c3-de.ne1.client2.attbi.com>
	<6a2dnXCsJ60-9Yzd4p2dnA@giganews.com>
Message-ID: <1074926701.236022@yasure>

Quoth Zoo Keeper <candiazoo at comcast.net>:
| No takers, eh?  :/
|
| I can't be the only python user on BeOS...
|
| The only thing I can think of is that I am running "bone".

Well, at least now we know one thing about your setup.

In later versions, a Python class can definitely inherit
from BWindow.  If you have the 0.5.1 distribution, the
programs in "test" do it that way, and they work.  Earlier
versions, before 0.5.0, can't do this (and neither can
older versions of Python.)  It is certainly possible to
mess up the BeOS libraries while trying to improve them,
though, as demonstrated by the 3rd party "Developer Edition".
That certainly could be your problem.

You're not the only Python user on BeOS, but they are few.
Given the level of general interest, I think you'd have
better odds posting to comp.sys.be.programmer.

As for what I read as your implicit question, will you be
sorry you chose to develop your application in Python with
a Bethon UI - it depends on the details.  The functions
available here are numerous but not nearly the whole Be API,
and there are whole areas of functionality that it will
probably never get into.  It's pretty useful for casual
stuff, but probably not for real hard core polished
applications.  Distribution will be a harder, too, than
a straight C++ program.

	Donn Cave, donn at drizzle.com


From flemming at bjerke.dk  Thu Jan 29 03:41:20 2004
From: flemming at bjerke.dk (flemming at bjerke.dk)
Date: 29 Jan 2004 08:41:20 -0000
Subject: I have changed my e-mail address
Message-ID: <20040129084120.54659.qmail@dmerhverv.org>

Send mail til: flem[SLET DETTE]@bjerke.dk



Send mail to: flem[DELETE THIS]@bjerke.dk



I close flemming at bjerke.dk.



Flemming





From sross at connectmail.carleton.ca  Tue Jan  6 12:19:00 2004
From: sross at connectmail.carleton.ca (Sean Ross)
Date: Tue, 6 Jan 2004 12:19:00 -0500
Subject: Integer math question
References: <3987e01c.0401030832.114c6f2a@posting.google.com>
	<ad052e5c.0401041659.68460bd@posting.google.com>
Message-ID: <k4CKb.5454$BA6.338716@news20.bellglobal.com>


"Dan Bishop" <danb_83 at yahoo.com> wrote in message
news:ad052e5c.0401041659.68460bd at posting.google.com...
> It's a feature.  The advantage of defining x // y as floor(x / y) is
> that x % y is always nonnegative.

Sorry, but x%y can be negative in Python:

>>> x, y = 5, -10
>>> x%y
-5




From aahz at pythoncraft.com  Mon Jan  5 15:42:02 2004
From: aahz at pythoncraft.com (Aahz)
Date: 5 Jan 2004 15:42:02 -0500
Subject: Tkinter and OS X 10.3?
References: <bs7pt0$a98$1@panix1.panix.com>
	<a5415304.0312241644.59cedac2@posting.google.com>
	<7ba1cb43.0312301205.30156acf@posting.google.com>
	<btcbrv$fl4$1@nntp6.u.washington.edu>
Message-ID: <btci6q$c1t$1@panix3.panix.com>

In article <btcbrv$fl4$1 at nntp6.u.washington.edu>,
Russell E. Owen <no at spam.invalid> wrote:
>
>You are almost certainly typing python instead of pythonw at the 
>terminal prompt. This results in exactly the error described. (I'm not 
>sure why there are two commands instead of python doing whatever extra 
>magic pythonw does.)

I'd guess that pythonw imports more stuff; if you want to run a non-GUI
application (say in a cron job), that would be wasteful.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

A: No.
Q: Is top-posting okay?


From james at logicalprogression.net  Wed Jan 21 14:50:23 2004
From: james at logicalprogression.net (James Henderson)
Date: Wed, 21 Jan 2004 19:50:23 +0000
Subject: Assignment to slice
In-Reply-To: <20040121191546.4975.qmail@web40102.mail.yahoo.com>
References: <20040121191546.4975.qmail@web40102.mail.yahoo.com>
Message-ID: <200401211950.23340.james@logicalprogression.net>

On Wednesday 21 January 2004 7:15 pm, Rich Krauter wrote:
> I see your point. However I could be wrong, but I
> don't know if what you say is really the case, since
> negative indexes are just shorthand for
>
>       actual positive index = i + len(x),
>
> where i is the negative index, and len(x) >= abs(i).
>
> e.g.
>
> x = [1,2,3,4,5]
> x[-4] is equivalent to x[-4+len(x)], which is x[1]
> x[-4:-2] is equivalent to x[(-4+len(x)):(-2+len(x))],
> which is x[1:3]
>
> I contend that my restriction may still hold even in
> the case of negative indices, since negative indices
> (which are just convenient shorthand), should map to
> positive indices.
>
> In that case,
> x = [1,2,3]
> x[-10:-9] = [54] should return an exception too since,
>
> x[-10:-9] = x[-10+len(x):-9+len(x)] == x[-7:-6], which
> is REALLY out of bounds of x.

Assignment to x[-4:-3] is not same as assignment to x[-1:0]:

>>> x = [1, 2, 3]
>>> x[-4:-3] = [56]
>>> x
[56, 1, 2, 3]
>>> x = [1, 2, 3]
>>> x[-1:0] = [56]
>>> x
[1, 2, 56, 3]

Although x[-4:-3] and x[-1:0] both evaluate to the same thing (an empty list).  
I would be interested to hear what anyone else has to say about this.

> Instead python will just tack stuff on to the front of
> the array. Which, I still believe, is totally
> inconsistent. But what do I know? I have about 5
> minutes of python experience.
>
> I guess I just don't like that behaviour. At least in
> perl if I assign something to a list slice:
>
> @x[2..3] = (4,5);
>
> the list grows,  so that the things I inserted are at
> the indices where I think I inserted them.
> That is, @x  now contains (0,0,4,5).

That's another way to do it, I suppose. :)

James
-- 
James Henderson, Logical Progression Ltd.
http://www.logicalprogression.net/
http://sourceforge.net/projects/mailmanager/




From none at none.com  Mon Jan 12 09:41:59 2004
From: none at none.com (Derek)
Date: Mon, 12 Jan 2004 09:41:59 -0500
Subject: Why learn Python ??
References: <40029dad$0$28706$a729d347@news.telepac.pt>
Message-ID: <btubno$bd8k6$1@ID-46268.news.uni-berlin.de>

"Bicho Verde" wrote:
> I have now free time and money to do what I want :-)
>
> I have some basic skills in programming (C, Pascal,
> Macromedia Actionscript) but don't know exactly what to do
> in the world of programming.
>
> And also I don't know exactly why would I learn Python
> rather than C#, C++ or Perl. Basicaly I don't know where
> to start, if there is much to do or if it is has it seems
> and there is software to everything nowadays and so
> doesn't make sense to spend time in learning a programming
> language.
>
> I just have this idea that I would like to contribute
> to the curve of accelarated exponential progress
> (technological singularity), artificial intelligence and so
> on. From that point of view there is much to do... But can
> I stand for it and where to start?
>
> Anyone would help me and give me some hints?

I agree in large part with Paul's comments.

C# is Microsoft's baby though it's technically an open standard -- 
don't go there unless you have a reason.

Perl is pretty cool but I definitely found it harder to use and less
intuitive than Python.

I would not dismiss C++ (or even vanilla C) outright.  I strongly
suggest starting in Python and looking to C and C++ when you have good
reason -- that is, when those languages will let you do something that
Python is less than than stellar at:  large applications, system
software, performance-critical applications, embedded programming,
etc.

I would also add that while Lisp has been a favorite in the AI
community, you will find that most AI techniques generalize to most
any programming language.  I spent a good deal of time in grad school
and on my first job doing AI programming in C++.  The only time I used
Lisp was in introductory classes, mostly to write elegant -- but
toy -- programs.




From steveb428pleaseremovethis at hotmail.com  Sun Jan 18 18:43:25 2004
From: steveb428pleaseremovethis at hotmail.com (DilbertFan)
Date: Sun, 18 Jan 2004 23:43:25 GMT
Subject: Using python for _large_ projects like IDE
References: <930ba99a.0401180625.5863acd4@posting.google.com>
	<22zOb.2835$Zk3.135@newssvr29.news.prodigy.com>
	<pan.2004.01.18.22.01.46.670164@yahoo.com>
Message-ID: <xSEOb.2950$jp6.2498@newssvr29.news.prodigy.com>

Thanks Sam
"Samuel Walters" <swalters_usenet at yahoo.com> wrote in message
news:pan.2004.01.18.22.01.46.670164 at yahoo.com...
> | DilbertFan said |
>
> > If you do write this  IDE, please include a compiler warning that
catches
> > the missing () at the end of a function that doesn't have arguments.
I've
> > sunk into a dark world of a diabolically mind-destroying hysteria while
> > trying to troubleshoot some scripts, and then realizing that a python
> > function was not executing because I was calling it without '()'.  But
> > Python doesn't complain, or give you a message or anything,... it simply
> > doesn't execute that function!
>
> Try PyChecker.  It should warn you about such things.
> http://pychecker.sourceforge.net/
>
> HTH
>
> Sam Walters.
>
> -- 
> Never forget the halloween documents.
> http://www.opensource.org/halloween/
> """ Where will Microsoft try to drag you today?
>     Do you really want to go there?"""
>




From http  Sat Jan 31 17:56:15 2004
From: http (Paul Rubin)
Date: 31 Jan 2004 14:56:15 -0800
Subject: OT: why do web BBS's and blogs get so slow?
Message-ID: <7xbrojk9rk.fsf_-_@ruckus.brouhaha.com>

Lots of times, when a blog (that supports user comments) or a web BBS
gets heavily loaded, it slows down horribly, even when it's hosted at
an ISP on a fast computer with plenty of net bandwidth.  I'm wondering
what those programs are doing, that makes them bog down so badly.
Anyone know what the main bottlenecks are?  I'm just imagining them
doing a bunch of really dumb things.

I'm asking this on clpy because thinking about the problem naturally
made me wonder how I'd write a program like that myself, which of
course would mean using Python.

FWIW, here's how I'd do it:

1) It would be single threaded web server (asyncore, twistedmatrix)
with a select loop talking to a socket, either on port 80 directly, or
to a proxy web server running mod_gzip, SSL, and so forth.

2) It might use MySQL for infrequent operations like user info lookup
at login time or preference updates, but not for frequent operations
like reading and posting messages.  User session info and preferences
would be in ram during a session, in a python dict indexed by a
browser session cookie.

3) The message store would be two files, one for metadata and one for
message text.  Both of these would be mmap'd into memory.  There would
be a fixed length of metadata for each message, so getting the
metadata for message #N would be a single array lookup.  The metadata
would contain the location in the text file where the message text is
and its length, so getting the text would take just one memcpy.  The
box would have enough ram to hold all recently active messages in ram
almost all the time.  Paging to disk is left to the host OS's virtual
memory system.  From the application's point of view everything is
always in ram.  Digging up old messages might take some page faults,
but doing that should be relatively rare.  New messages are always
appended to the files, keeping memory and paging behavior fairly
localized.  There might be a third file for an activity log, which is
append-only (serial access).  Ideally that would be on a separate disk
from the message disk, to reduce head contention.

4) Finding all N messages in an active discussion thread might require
chasing N pointers in the metadata file, but that would usually be at
most a few thousand small lookups, all in ram, and the thread info
would be cached in ram in the application once found.  Fancier disk
structures could speed this up but probably arn't needed.

A site like Slashdot gets maybe 20(?) page views per second at busy
times, and around 10,000 new messages a day of maybe 1 kbyte each, a
mere 10 MB per day of message text, no problem to keep in ram.  I'd
like to think that the above scheme could handle Slashdot's traffic
level pretty easily on one or two typical current PC's with IDE disks,
one PC for the BBS application and the other (if needed) for a proxy
server running gzip and caching static pages.  Am I being naive and/or
missing something important?  Slashdot itself uses a tremendous amount
of hardware by comparison.


From bignose-hates-spam at and-benfinney-does-too.id.au  Mon Jan 26 21:23:37 2004
From: bignose-hates-spam at and-benfinney-does-too.id.au (Ben Finney)
Date: 27 Jan 2004 13:13:37 +1050
Subject: Python on portable storage
References: <slrnc1bj85.lot.bignose-hates-spam@iris.polar.local>
Message-ID: <slrnc1bk2p.lot.bignose-hates-spam@iris.polar.local>

On 27 Jan 2004 12:59:26 +1050, Ben Finney wrote:
> Howdy all,
> 
> I'm experimenting with carrying my personal computing environment around
> on a keychain USB flash storage device.  I have the usual suspects on
> there: SSH keys, GPG keys, program configs.
> 
> I'm probably not the first to think that a standalone distribution of
> Python would be a useful thing to have in my back pocket.  Finding
> information on that is proving to be a problem, however.

I did find this thread:

    <http://groups.google.com/groups?group=comp.lang.python&threadm=VXcVa.28%24HY3.42617%40news.uswest.net>

where the OP asked much the same question; the responses were mostly
"boot GNU/Linux and run it that way".  This isn't what I'm after; I want
to walk up to an existing machine, and, without rebooting or installing
any software on the machine, plug in my USB storage device and run
Python entirely from that.

This will mean having a Python executable that can run under the
existing environment, of course.  What I'm hoping is that there is
information on how to set that up, so that the resulting storage has a
self-contained Python environment, assuming the executable will run in
the first place.

-- 
 \       "I filled my humidifier with wax. Now my room is all shiny."  |
  `\                                                  -- Steven Wright |
_o__)                                                                  |
Ben Finney <http://bignose.squidly.org/>


From jepler at unpythonic.net  Mon Jan  5 22:10:34 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Mon, 5 Jan 2004 21:10:34 -0600
Subject: Python/C and PYTHONPATH
In-Reply-To: <btc2ng$alg$1@ousrvr3.oulu.fi>
References: <btbn3o$5oo$1@ousrvr3.oulu.fi>
	<mailman.98.1073310473.12720.python-list@python.org>
	<btc2ng$alg$1@ousrvr3.oulu.fi>
Message-ID: <20040106031034.GE5514@unpythonic.net>

On Mon, Jan 05, 2004 at 04:17:52PM +0000, Tero Pihlajakoski wrote:
> Jeff Epler <jepler at unpythonic.net> wrote:
> > You'd need to tell us how you're invoking Python.  When the Python
> 
> Take a look at:  
> http://www.python.org/doc/current/ext/pure-embedding.html.  Basically,
> it's about same (and I tested with it too, same results: failing)

Here's the program I came up with:

#include <Python.h>

int
main(int argc, char *argv[])
{
    Py_SetProgramName(argv[0]);
    Py_Initialize();
    PyRun_SimpleString("import sys; print sys.path, sys.executable");
    PySys_SetArgv(argc-1, argv+1);
    PyRun_SimpleString("import sys; print sys.path, sys.executable");
    Py_Finalize();
    return 0;
}

This program demonstrates that the initial sys.path element
corresponding to the location of the script is created when
PySys_SetArgv() is called:

$ ./embed
['/usr/lib/python2.2', '/usr/lib/python2.2/plat-linux2', ...]
['', '/usr/lib/python2.2', '/usr/lib/python2.2/plat-linux2', ...]

That first element depends on the location of the script, as shown here:

$ ./embed /tmp/x
['/usr/lib/python2.2', '/usr/lib/python2.2/plat-linux2', ...]
['/tmp', '/usr/lib/python2.2', '/usr/lib/python2.2/plat-linux2', ...]

I don't know where this is documented---PySys_SetArgv is mentioned in
the "api" document, but this side-effect is not:
	http://www.python.org/doc/current/api/embedding.html#l2h-35
	http://www.python.org/doc/current/api/initialization.html#l3h-713
You might want to explore just what PySys_SetArgv and submit a
documentation patch on sourceforge, both for the api document and for
the ext document.  Interestingly, calling PySys_SetArgv multiple times
inserts multiple items in sys.path.

Jeff



From peter at engcorp.com  Tue Jan 13 10:50:56 2004
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 13 Jan 2004 10:50:56 -0500
Subject: Division oddity
References: <ssn3009029rrug3l8dk1pn06tqd019ucld@4ax.com>
	<7xeku5vrn8.fsf@ruckus.brouhaha.com>
	<cdm7005r12o3o3f6gngj8no1qh74ul3733@4ax.com>
Message-ID: <400413E0.5C691A56@engcorp.com>

Tim Rowe wrote:
> 
> Well, the documentation for "input()" says "Equivalent to
> eval(raw_input(/prompt/))". Perhaps it should say "/Usually/
> equivalent...."

I remember reading that too, and just assumed that at this point
it was in fact *implemented* that way, as a simple alias.  Maybe
it should be...

-Peter


From peter at engcorp.com  Mon Jan 19 14:52:59 2004
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 19 Jan 2004 14:52:59 -0500
Subject: Escaping slashes (double backslash plague)
References: <mailman.500.1074516185.12720.python-list@python.org>
Message-ID: <400C359B.58CCB134@engcorp.com>

Aloysio Figueiredo wrote:
> 
> I need to replace every ocurrence of '/' in s by '\/'
> in order to create a file named s. 

Harry inspired me to reread your question, but now I think you might 
be very confused about something.

Are you trying to create a file whose name contains a forward
slash?  And you think that by "escaping" the slash with a backslash,
you can do this?

If so, give up: it's not possible.  File names cannot contain a
forward slash, at least on most any operating system which uses slashes
as path separators. (*)

If this isn't what you're trying to do, please explain more thoroughly
what your goal is, because it seems very unnecessary to be putting 
\/ into a string for any reason (whether as a path or not) ...

-Peter

(*) Examples to the contrary, while perhaps interesting, notwithstanding...


From claird at lairds.com  Tue Jan 20 10:32:48 2004
From: claird at lairds.com (Cameron Laird)
Date: Tue, 20 Jan 2004 15:32:48 -0000
Subject: Fw: PDF library for reading PDF files
References: <mailman.464.1074430854.12720.python-list@python.org>
	<400BFF7B.95F21050@netsurf.de>
	<mailman.534.1074585531.12720.python-list@python.org>
	<400CF2E3.29506EAE@netsurf.de>
Message-ID: <100qih06uo847db@corp.supernews.com>

In article <400CF2E3.29506EAE at netsurf.de>,
Andreas Lobinger  <andreas.lobinger at netsurf.de> wrote:
>Aloha,
>
>Peter Galfi schrieb:
			.
			.
			.
>> having to implement all the decompressions, etc. The "information" I am
>> trying to extract from the PDF file is the text, specifically in a way to
>> keep the original paragraphs of the text. I have seen so far one shareware
			.
			.
			.
>As others wrote here, the simplest solution is to use a external
>pdf-2-text programm and postprocess the data. Read comp.text.pdf
>
>There is no simple and consistent way to extract text from a .pdf
>because there are many ways to set text. The optical impression
			.
			.
			.
I want to emphasize that final sentence.  If you insist on pursuing
this, though, refer to <URL:
http://phaseit.net/claird/comp.text.pdf/PDF_converters.html#pdf2txt >.
-- 

Cameron Laird <claird at phaseit.net>
Business:  http://www.Phaseit.net


From scottdog at nospam.com  Wed Jan 21 10:08:37 2004
From: scottdog at nospam.com (Dog@will.hunt)
Date: Wed, 21 Jan 2004 07:08:37 -0800
Subject: Installing SpamBayes
References: <400c399b_2@newsfeed.slurp.net>
	<up5r00hr648soiun3j6q326ga9n808hf17@4ax.com>
	<400c451a_1@newsfeed.slurp.net>
	<20040120135921.1C3F.JCARLSON@uci.edu>
	<400c5790_1@newsfeed.slurp.net>
	<20040120150005.1C48.JCARLSON@uci.edu>
	<400c6146_1@newsfeed.slurp.net>
	<20040120171127.0606.JCARLSON@uci.edu>
Message-ID: <400d3f3f_2@newsfeed.slurp.net>

Its my fault for not being clear on this.  I know how to change the
directory on a command prompt in Windows.  I was speaking of the Python
prompt (>>>).  Once I got that, I tried running the file but got this:

Python 2.3.3 (#51, Dec 18 2003, 20:22:39) [MSC v.1200 32 bit (Intel)] on
win32
Type "help", "copyright", "credits" or "license" for more information.
>>> python setup.py install
  File "<stdin>", line 1
    python setup.py install
               ^
SyntaxError: invalid syntax
>>>

Hope this clears up my inability to give the correct info!  :)


"Josiah Carlson" <jcarlson at uci.edu> wrote in message
news:20040120171127.0606.JCARLSON at uci.edu...
>
> Here is an example set of interactions I did with my command line:
>
> Microsoft Windows 2000 [Version 5.00.2195]
> (C) Copyright 1985-2000 Microsoft Corp.
>
> C:\>cd "Documents and Settings"
>
> C:\Documents and Settings>cd jcarlson
>
> C:\Documents and Settings\jcarlson>cd Desktop
>
> C:\Documents and Settings\jcarlson\Desktop>cd ..
>
> C:\Documents and Settings\jcarlson>cd \
>
> C:\>d:
>
> D:\>c:
>
> C:\>
>
>
> I hope that is enough of an example for you to figure out what is going
> on. As to which path you need to change to, it is wherever you decided
> to uncompress Spambayes.
>
> A few things to note.  On Windows 2000/xp:
> C:\Documents and Settings\<user name>\Desktop is the default location of
> your desktop.
> c:\Documents and Settings\<user name>\My Documents is the default location
> of your 'My Documents' folder..
>
>
> If this isn't enough, then Jeebus help you.
>
>  - Josiah
>
>
> > I think that may be my problem.  I am not sure how to change the path to
> > where the setup.py file is...
> >
> > > > That didnt work either and the file assoc. are correct.
> > > >
> > > > > If you are in windows and your associations are correct, try:
> > > > > setup.py install
> > >
> > > Steps for you to help us help you:
> > > 1. Open up a console.
> > > 2. Change to the proper path.
> > > 3. Run (without the single quotes)
> > >   'python setup.py install'
> > >  if that doesn't work, try
> > >   'setup.py install'
> > > 4. Copy and paste the output in a message here.
> > >
> > >  - Josiah
> > >
> >
>




From turnmeinsideoutandeatme14 at yahoo.com  Wed Jan 21 10:23:34 2004
From: turnmeinsideoutandeatme14 at yahoo.com (turnmeinsideoutandeatme14)
Date: Wed, 21 Jan 2004 15:23:34 -0000
Subject: My roomate taped me feeling myself
Message-ID: <bum5hm+s3gf@eGroups.com>

I can't believe she taped me and posted it on the internet
alot of guys told me they thought it was hot but I might remove it
here is the link, let me know what you think

http://www.hotpersonalad.com/landing.asp?afl=YYHO




From jblazi at hotmail.com  Sat Jan 10 17:04:08 2004
From: jblazi at hotmail.com (jblazi)
Date: Sat, 10 Jan 2004 23:04:08 +0100
Subject: Emacs python mode question
References: <pan.2004.01.10.21.08.16.172000@hotmail.com>
	<mailman.274.1073771373.12720.python-list@python.org>
Message-ID: <pan.2004.01.10.22.04.08.125000@hotmail.com>

On Sat, 10 Jan 2004 15:49:22 -0600, Skip Montanaro wrote:

> 
>     jb> If I should like to go to line 345: how can I do that? Typing M-x
>     jb> goto-line and then 345 is a bit cumbersome.  I defines the key
>     Alt-g jb> to be goto-line, but it does not work.
> 
> Is M-g not bound to goto-line?  You can check for keybindings by typing
> "C-h w" then entering the name of a command.

Thx.
gogo-line is on the menu but is not bound to a key. How can I bind it?

-- 
jb 


----== Posted via Newsfeed.Com - Unlimited-Uncensored-Secure Usenet News==----
http://www.newsfeed.com The #1 Newsgroup Service in the World! >100,000 Newsgroups
---= 19 East/West-Coast Specialized Servers - Total Privacy via Encryption =---


From tzot at sil-tec.gr  Thu Jan  8 13:21:22 2004
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Thu, 08 Jan 2004 20:21:22 +0200
Subject: Why " ".some_string is often used ?
References: <Xns94698A5566736stefninnospamyahoofr@213.228.0.4>
	<vvqghojub1dl07@news.supernews.com>
	<3FFD70EA.A6AF3CB8@engcorp.com> <u8ykio3n4.fsf@online.no>
Message-ID: <0t6rvv8085j2fjc3ocg07m8gugtn3e2sq0@4ax.com>

On 08 Jan 2004 16:34:39 +0100, rumours say that Syver Enstad
<syver-en+usenet at online.no> might have written:

>I'd also like a reversing method for len
>
>class MyList(list):
>   def len(self):
>        return len(self)

You can always use the __len__ attribute in this specific case.

And now for the hack value:

class MyList(list):
    import new as _new, __builtin__
    def __getattr__(self, attr):
        try:
            return self._new.instancemethod( \
                   getattr(self.__builtin__, attr), \
                   self, \
                   None)
        except AttributeError:
            raise AttributeError, \
                  "there is no '%s' builtin" % attr

allowing:

>>> a=MyList()
>>> a.append(12)
>>> a.append(24)
>>> a.len()
2
>>> a.min()
12
>>> a.max()
24

It works for all builtins that can take a list as a first argument.
Of course it should not be taken seriously :)
-- 
TZOTZIOY, I speak England very best,
Ils sont fous ces Redmontains! --Harddix


From daniel.dittmar at sap.com  Mon Jan  5 07:40:01 2004
From: daniel.dittmar at sap.com (Daniel Dittmar)
Date: Mon, 5 Jan 2004 13:40:01 +0100
Subject: Scoped Lock
References: <bt9ovs$p92$1@graf.cs.uni-magdeburg.de>
	<3ff8a259$0$121$e4fe514c@dreader10.news.xs4all.nl>
	<btbhpt$l0l$1@graf.cs.uni-magdeburg.de>
Message-ID: <btblv2$k7e$1@news1.wdf.sap-ag.de>

Marco Bubke wrote:
> This does not look nice to me. There should be something me easily.
> Maybe that:
>
> def do_something() lock(mutex):
>         #this stuff is locked by the mutex
>
> So you don't forget to release the lock.

You could create a class that locks the mutex in the constructor and unlocks
it in the __del__ method.

class ScopedLock:
    def __init__ (self, mutex):
        self.mutex = mutex
        mutex.acquire()

    def __del__ (self):
        self.mutex.release ()

use as
def do_something():
    lock = ScopedLock (mutex)
    # do something
    # lock will be automatically released when returning


This works only in the current implementation of CPython where local
variables are usually (*) deleted when they fall out of scope.

(*) usually: unless they are returned or added to another object

And I guess with metaclasses, you can achieve something like Java's
synchronized methods.

Daniel





From tjreedy at udel.edu  Fri Jan 16 14:54:21 2004
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 16 Jan 2004 14:54:21 -0500
Subject: Bug or feature?
References: <bu58st$1ha3$1@news.rtcomm.ru><3dtid1-594.ln1@beastie.ix.netcom.com><ZvidncM7G8svuZrdRVn-jA@comcast.com><1ljkd1-053.ln1@beastie.ix.netcom.com>
	<mailman.433.1074267521.12720.python-list@python.org>
Message-ID: <RtKdne6Rtpj_3JXdRVn-gQ@comcast.com>


"Jp Calderone" <exarkun at intarweb.us> wrote in message
news:mailman.433.1074267521.12720.python-list at python.org...
> On Fri, Jan 16, 2004 at 08:31:32AM +0000, Dennis Lee Bieber wrote:
> > Terry Reedy fed this fish to the penguins on Thursday 15 January 2004
> > 15:39 pm:
> >
> > >
> > > and returning a value.  I see a little better Guido's reason for
having
> > > list modification methods return None.  While chaining is not too
> > > problematical, object returns would allow list expressions mixing
> > > implicit and overt effects with possible puzzles similar to the one
> > > presented in this thread.

> >         Now that you mention it... Yeah... Can you imagine trying to
figure
> > out what something like...

>http://python.org/doc/current/ref/evalorder.html
>   Doesn't seem to be a problem, after all.

Not for you, but how about newbie and others who don't read or ignore,
misunderstand, or reject what they read?  Lets try this example based on
OP's real examples.  Again, hypothetical, assuming list mutators were to
return list.

l3 = range(3)
l3+l3.reverse()
# I believe that this wouldbe [1,2,3,3,2,1]
l3 = range(3)
tem = l3.reverse()
l3 + tem
# I believe that this would  instead be [3,2,1,3,2,1]

I am sure that were such things legal, there would be numerous posts
complaining about 'unexpected' outcomes.  Hence my comment about their not
being legal being good.

OP believe that getting a different answer when inserting a tempory in the
midst of a side-effect dependent expression is such a problem that we
should break code to 'fix' it.   I obviously disagree.

Terry J. Reedy




From rupole at hotmail.com  Fri Jan  2 03:36:29 2004
From: rupole at hotmail.com (Roger Upole)
Date: Fri, 2 Jan 2004 00:36:29 -0800
Subject: pynettestuser
References: <bt0teu$fvt515@imsp212.netvigator.com>
Message-ID: <3ff4ff8f_3@127.0.0.1>

This probably came out of one of the sample scripts from win32all.
Win32netdemo.py creates and deletes a user by that name.
         Roger

"PPeterson" <wish2banonymous> wrote in message
news:bt0teu$fvt515 at imsp212.netvigator.com...
> Hi,
>
> I am a newbie to python. python installer created a directory named
> pynettestuser in the c:\documents and settings. What is that? Thanks.
>
> PP
>
>




From haim at babysnakes.org  Wed Jan 21 10:39:37 2004
From: haim at babysnakes.org (Haim Ashkenazi)
Date: Wed, 21 Jan 2004 17:39:37 +0200
Subject: py2exe error
References: <490316A24CC5D411ACD700B0D078F7F003915DD0@cseexch01.cse.creoscitex.com>
Message-ID: <bum6fp$utc$1@sea.gmane.org>

Pieter Claerhout wrote:

> Change the setup script to:
> 
> from distutils.core import setup
> import py2exe
> 
> setup(
>       options = {  'py2exe': { 'packages': 'encodings' } },
>       name = 'default',
>       version = '0.1.0',
>       console = ["CLI_Backup.py"],
>       windows = ["Configurator.py"]
> )
> 
> This will force py2exe to include the encodings package which should solve
> your problem
thanx, it solved the problem.

Bye

> 
> Cheers,
> 
> 
> pieter
> 
> Creo
> pieter claerhout | product support prinergy | tel: +32 2 352 2511 |
> pieter.claerhout at creo.com | www.creo.com
> 
> IMAGINE CREATE BELIEVE(tm)
> 
> 
> -----Original Message-----
> From: Haim Ashkenazi [mailto:haim at babysnakes.org]
> Sent: 21 January 2004 15:40
> To: python-list at python.org
> Subject: py2exe error
> 
> 
> Hi
> 
> (complete newbie warning...:) )
> 
> I've written a script that uses pickle to store data to a file. here's the
> code that stored the data:
> 
> -------------
> 
>     def put(self, conf):
>         """ dump the preferences to a file"""
>         
>         # TODO: make a backup copy of the prefs !!!!
>         try:
>             f = open(self.bacFile, "w")
>         except:
>             raise 'BadFileError', "couldn't write file"
>             
>         pickle.dump(conf, f)
>         f.close()
> 
> ---------------------------------
> 
> when running from regular python interperter, it works fine.
> 
> I need this script to run without python installed, so I've created a
> stand-alone binary with py2exe. I used the following simple setup.py:
> 
> from distutils.core import setup
> import py2exe
> 
> setup(name = 'default',
>       version = '0.1.0',
>       console = ["CLI_Backup.py"],
>       windows = ["Configurator.py"]
> )
> -------------------------
> 
> when running from this binary I get this error:
> Traceback (most recent call last):
>   File "MainFrame.pyc", line 140, in OnSaveMenuEvent
>   File "MainFrame.pyc", line 174, in dumpPrefs
>   File "NS_Backup.pyc", line 64, in put
>   File "pickle.pyc", line 1382, in dump
>   File "pickle.pyc", line 231, in dump
>   File "pickle.pyc", line 293, in save
>   File "pickle.pyc", line 663, in save_dict
>   File "pickle.pyc", line 677, in _batch_setitems
>   File "pickle.pyc", line 293, in save
>   File "pickle.pyc", line 514, in save_unicode
> LookupError: no codec search functions registered: can't find encoding
> -----------------------------
> 
> I guess I should add some custom module to the setup.py but I don't know
> which (or am I completely off track here...).
> 
> can someone help?
> 
> thanx
> --
> Haim
> 
> 
> 





From skip at pobox.com  Wed Jan 21 19:39:03 2004
From: skip at pobox.com (Skip Montanaro)
Date: Wed, 21 Jan 2004 18:39:03 -0600
Subject: Python and writing a CSV file
In-Reply-To: <009501c3e07e$80b62e30$97443d42@homebass1>
References: <mailman.611.1074719029.12720.python-list@python.org>
	<kNDPb.6494$6o4.181@fe2.texas.rr.com>
	<20040121232549.GA28328@mail.theserver.ath.cx>
	<009501c3e07e$80b62e30$97443d42@homebass1>
Message-ID: <16399.7079.192926.761791@montanaro.dyndns.org>


    Kevin> I am new to Python and would like to attempt to write to a CSV
    Kevin> file. I have reviewed the documentation at
    Kevin> http://www.object-craft.com.au/projects/csv/ for the csv 1.0
    Kevin> module but I didn't see any information referring to writing (oe
    Kevin> creating) a CSV file with this module. Does this module have the
    Kevin> capability to write a CSV file? 

Yes, but you should upgrade to 2.3 (if you haven't already) and just use the
csv module which comes with it:

    http://www.python.org/doc/current/lib/module-csv.html

Skip



From warkid at hotbox.ru  Thu Jan 15 03:50:57 2004
From: warkid at hotbox.ru (Kerim Borchaev)
Date: Thu, 15 Jan 2004 11:50:57 +0300
Subject: super. could there be a simpler super?
Message-ID: <2051345875.20040115115057@hotbox.ru>

Hello!

  Always when I use "super" I create a code duplication because class
  used as first arg to "super" is always the class where the method
  containing "super" was defined in:
  '''
  class C:
      def method(self):
          super(C, self).method()
  '''

  Obviously the methods like the one below doesn't work "right";-)
  '''
  def super(self):
      super(self.__class__, self)
  class C:
      def method(self):
          super(self).method()
  '''

  Is it possible that such a "super"(deducing class method declaration
  context) could appear in Python?
  (It seems to me that to implement a simple super something should be
  done during "compilation" of class declaration.)

Best regards,
 Kerim                          mailto:warkid at hotbox.ru





From aahz at pythoncraft.com  Sun Jan  4 11:13:39 2004
From: aahz at pythoncraft.com (Aahz)
Date: 4 Jan 2004 11:13:39 -0500
Subject: Parametrized inheritance
References: <2AJJb.725692$HS4.5422608@attbi_s01>
	<mailman.64.1073189833.12720.python-list@python.org>
	<sNNJb.741891$Fm2.670283@attbi_s04>
Message-ID: <bt9e3j$djr$1@panix3.panix.com>

In article <sNNJb.741891$Fm2.670283 at attbi_s04>,
Dan Bullok  <myfirstname at mylastname.com> wrote:
>Mike C. Fletcher wrote:
>>
>> You can find more information about these kinds of patterns by searching
>> for "Mix-In Class" and/or "Multiple Inheritance".  Python 2.2 changed how
>> multiple inheritance graphs are constructed in Python, BTW.  If you used
>> old-style classes the mro would have been [MySub, Sub, Base, MyBase, Base]
>> IIRC.
>
>Well, I thought of doing this, but after looking up resolution order (sec
>9.5.1 of the tutorial) I found that resolution is done "depth-first,
>left-to-right",  In my example, that would have given [MySub, Sub, Base,
>MyBase, Base], but, I checked, using mro(), and found that it was indeed
>[MySub, Sub, MyBase, Base], just as I needed it.  (thanks for the mro() tip
>- didn't know about that one).  Unless I've gone crosseyed (possible, it's
>late), this is NOT depth-first, left-to-right.  So is the tutorial out of
>date?

As Mike said, it's different for new-style classes.  See
http://www.python.org/2.2.3/descrintro.html
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

Weinberg's Second Law: If builders built buildings the way programmers wrote 
programs, then the first woodpecker that came along would destroy civilization.


From popngen at uclink.berkeley.edu  Tue Jan 27 20:29:53 2004
From: popngen at uclink.berkeley.edu (Alfred)
Date: 27 Jan 2004 17:29:53 -0800
Subject: Running python automatically in the background
Message-ID: <1e4e0378.0401271729.3ea6b5c2@posting.google.com>

hi all,

i'm trying to figure out if there is some easy way to run a python
script in the background _without_ specifying "&" in a linux
enivornment.

script.py &

vs

script.py

is there an easy way to do this?

been looking around but couldn't find any docs to support a
possibility.

thanks!

- al


From shoot at the.moon  Sun Jan  4 15:46:05 2004
From: shoot at the.moon (Steve Horsley)
Date: Sun, 04 Jan 2004 20:46:05 +0000
Subject: Let users execute but not view
In-Reply-To: <bt9o11$7rq$05$1@news.t-online.com>
References: <bt9o11$7rq$05$1@news.t-online.com>
Message-ID: <bt9tp4$lj6$1@news.freedom2surf.net>

Florian Lindner wrote:
> Hi!
> I have a python script which should be executed my normal users but they
> should not be able to view the sourcecode. Setting permissions to x only
> does not help, the python interpreter can not read the file.
> How can I do that?
> Thanks,
> Florian

I believe that the common thing to do is to remove the .py file but 
leave the compiled .pyc file, which is rather more difficult to 
reverse-engineer. Not impossible of course.

However, I'm only a newbe and others may know a better way.

Steve


From exarkun at intarweb.us  Tue Jan 27 09:08:36 2004
From: exarkun at intarweb.us (Jp Calderone)
Date: Tue, 27 Jan 2004 09:08:36 -0500
Subject: How does compare work?
In-Reply-To: <20040127131651.GA3495@nl.linux.org>
References: <40158680$0$7044$ba620e4c@news.skynet.be>
	<20040126235704.GD13453@siliconimage.com>
	<20040127131651.GA3495@nl.linux.org>
Message-ID: <20040127140836.GA16734@intarweb.us>

On Tue, Jan 27, 2004 at 02:16:51PM +0100, Gerrit Holl wrote:
> Inyeol Lee wrote:
> > (This unusual definition of comparison was used to simplify the
> > definition of operations like sorting and the in and not in operators.
> > In the future, the comparison rules for objects of
> > different types are likely to change.) 
> > """
> 
> When comparing mixed types becomes illegal, does that mean sorting a
> sequence of mixed types becomes illegal as well? Or will sort be a
> special case?
> 

  There was discussion of another operation, "before", which could be used
to order different types, but which would not be used by < or >.

  I forget if the final word on this idea was positive or negative, but I'm
sure anyone interested could dig up the relevant thread on python-dev.

  Jp



From aahz at pythoncraft.com  Fri Jan  9 16:00:53 2004
From: aahz at pythoncraft.com (Aahz)
Date: 9 Jan 2004 16:00:53 -0500
Subject: Tcl/Tk Support
References: <mailman.231.1073668582.12720.python-list@python.org>
	<btms6u$9rr$1@panix2.panix.com>
	<mailman.236.1073676782.12720.python-list@python.org>
Message-ID: <btn4q5$s1f$1@panix3.panix.com>

In article <mailman.236.1073676782.12720.python-list at python.org>,
Diego Ribeiro de Andrade <diego.andrade at smartech.com.br> wrote:
>
>Yes... I typed import Tkinter too but the output was the same!
>
>how I do to install support for Tkinter? Can I download the Tkinter.py file
>and paste in the include directory of Python2.2?

You'll probably have to install a package called something like
"tk8.3-dev" (that's what it's called in Debian), download the Python
source, and build Python.  It's possible that the RPMs for Python already
have Tkinter built in, but you'll still need to install Tcl/Tk to make it
work.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

A: No.
Q: Is top-posting okay?


From rays at blue-cove.com  Thu Jan 29 16:44:09 2004
From: rays at blue-cove.com (Ray Schumacher)
Date: Thu, 29 Jan 2004 13:44:09 -0800
Subject: win32com - .ocx won't Dispatch...
In-Reply-To: <opr2jzrigx8cxiwf@news.packetworks.net>
References: <mailman.962.1075345407.12720.python-list@python.org>
Message-ID: <5.2.0.4.0.20040129132222.00b82e18@blue-cove.com>

At 12:12 PM 1/29/2004, Markus Wankus wrote:
>Open the gen_py'd file 8AA34F82-95C9-11D3-8EB6-00C0DF2247CAx0x3x5.py, and do some searching.  You should be able to find an obvious main class related to what you are doing (I'm not sure what the .tlb is), and it will say in the comment or docstring that it is a "<foo>.<bar>", or whatever. 

Thanks Markus,

The lines are from CoClassBaseClass:
...
# This CoClass is known by the name 'EDREUTLX.EDREUtlXCtrl.1'
class EDREUtlX(CoClassBaseClass): # A CoClass
...
That would be a helpful bit for the docs! 

So, the util class Dispatches, but all calls (properties and functions) give 'Catastrophic failure'
Is this really some sort of types problem with this OCX?
"pywintypes.com_error: (-2147418113, 'Catastrophic failure', None, None)"

Thanks for the help,
Ray

Test run below, kitchen sink included:

C:\projects\CV-Mini>python
Python 2.3.3 (#51, Dec 18 2003, 20:22:39) [MSC v.1200 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> from win32com.client import *
>>> util = gencache._GetModule('8AA34F82-95C9-11D3-8EB6-00C0DF2247CAx0x3x5')
>>> gencache.GetGeneratedFileName('8AA34F82-95C9-11D3-8EB6-00C0DF2247CA',0,3,5)
'AA34F82-95C9-11D3-8EB6-00C0DF2247Cx0x3x5'
>>> gencache.MakeModuleForTypelib('8AA34F82-95C9-11D3-8EB6-00C0DF2247CAx0x3x5',0
,3,5)
>>> gencache.GetModuleForCLSID('8AA34F82-95C9-11D3-8EB6-00C0DF2247CA')
>>> gencache.GetClassForCLSID('8AA34F82-95C9-11D3-8EB6-00C0DF2247CA')
>>> gencache.GetModuleForProgID('EDREUTLX.EDREUtlXCtrl.1')
<module 'win32com.gen_py.8AA34F82-95C9-11D3-8EB6-00C0DF2247CAx0x3x5' from 'C:\Py
thon23\lib\site-packages\win32com\gen_py\8AA34F82-95C9-11D3-8EB6-00C0DF2247CAx0x
3x5.pyc'>
>>> gencache.EnsureModule('{8AA34F82-95C9-11D3-8EB6-00C0DF2247CA}',0,3,5)
<module 'win32com.gen_py.8AA34F82-95C9-11D3-8EB6-00C0DF2247CAx0x3x5' from 'C:\Py
thon23\lib\site-packages\win32com\gen_py\8AA34F82-95C9-11D3-8EB6-00C0DF2247CAx0x
3x5.pyc'>
>>> gencache.EnsureModule('EDREUTLX.EDREUtlXCtrl.1',0,3,5)
>>> util = Dispatch("EDREUTLX.EDREUtlXCtrl.1")
>>> util
<win32com.gen_py.EDRE Utility Control._DEDREUtlX instance at 0x11224368>
>>> gencache.EnsureDispatch(util)
<win32com.gen_py.EDRE Utility Control._DEDREUtlX instance at 0x11224728>
>>>
>>> util = Dispatch("EDREUTLX.EDREUtlXCtrl.1")
>>> util
<win32com.gen_py.EDRE Utility Control._DEDREUtlX instance at 0x11224288>
>>> # pop-up, no args
... util.AboutBox()
Traceback (most recent call last):
  File "<stdin>", line 2, in ?
  File "C:\Python23\lib\site-packages\win32com\gen_py\8AA34F82-95C9-11D3-8EB6-00
C0DF2247CAx0x3x5.py", line 34, in AboutBox
    return self._oleobj_.InvokeTypes(-552, LCID, 1, (24, 0), (),)
pywintypes.com_error: (-2147418113, 'Catastrophic failure', None, None)
>>> # a property
... util.Version
Traceback (most recent call last):
  File "<stdin>", line 2, in ?
  File "C:\Python23\lib\site-packages\win32com\client\__init__.py", line 451, in
 __getattr__
    return self._ApplyTypes_(*args)
  File "C:\Python23\lib\site-packages\win32com\client\__init__.py", line 445, in
 _ApplyTypes_
    return self._get_good_object_(self._oleobj_.InvokeTypes(*((dispid, 0, wFlags
, retType, argTypes) + args)), user, resultCLSID)
pywintypes.com_error: (-2147418113, 'Catastrophic failure', None, None)
>>>





From cwilcox at etcconnect.com  Tue Jan 20 15:44:23 2004
From: cwilcox at etcconnect.com (Christian Wilcox)
Date: Tue, 20 Jan 2004 14:44:23 -0600
Subject: an example of a singleton design pattern in python? <- from the
	python cookbook
Message-ID: <69A0D4AB81C51447AD6BA387782B8D6401343F6C@midl-mail4.etcconnect.com>

A link to search results from the online python cookbook:

http://aspn.activestate.com/ASPN/search?query=singleton&x=0&y=0&section=PYTHONCKBK&type=Subsection


> -----Original Message-----
> From: Daniel Ortmann [mailto:dortmann at lsil.com]
> Sent: Tuesday, January 20, 2004 2:25 PM
> To: python-list at python.org
> Subject: an example of a singleton design pattern in python?
> 
> 
> Hello,
> 
> Does anyone have an example of a singleton design pattern in python?
> 
> Thanks!
> 
> -- 
> Daniel Ortmann, LSI Logic, 3425 40th Av NW, Suite 200, 
> Rochester MN 55901
> work: Daniel.Ortmann at lsil.com / 507.535.3861 / 63861 int / 
> 8012.3861 gdds
> home: ortmann at venturecs.net / 507.288.7732, 2414 30Av NW #D, 
> Rochester MN 55901
> gpg/pgp public key: http://wwwkeys.us.pgp.net
> jabber: daniel_ortmann at jabber.org / dortmann at jabber.co.lsil.com
> -- 
> http://mail.python.org/mailman/listinfo/python-list
> 



From No.Spam.mc at No.Spam.mclaveau.No.Spam.com  Sun Jan 11 18:40:05 2004
From: No.Spam.mc at No.Spam.mclaveau.No.Spam.com (Michel Claveau/Hamster)
Date: Mon, 12 Jan 2004 00:40:05 +0100
Subject: Search and replace a specific word in a file object.
References: <56f42e53.0401111519.2da31b8a@posting.google.com>
Message-ID: <btsmvi$b43$1@news-reader4.wanadoo.fr>

Hi !


You can try this :

def remplacerdansfichiertxt(file, listeremplacement, filout):
# remplacement dans un fichier texte (et non binary)
    import os,os.path,re
    if os.path.isdir(file):
        print(file+' is a Directory !')
    else:
        data = open(file, "rb").read()
        if '\0' in data:
            print('it's a binary file')
        else:
            newdata=data
            for chaine,remplacement in listeremplacement :
                newdata = re.sub(chaine, remplacement, newdata)
            if newdata != data:
                f = open(filout, "wb")
                f.write(newdata)
                f.close()
                print(file,';',chaine,' => ',remplacement,':',filout,'  :
OK')

in the call, the parameter "listeremplacement" is like
[('oldVal','newVal'),('aaa','bbbb'),('qwerty','azerty')]

@-salutations
--
Michel Claveau





From spamsucks at Ih8it.com  Wed Jan  7 10:04:29 2004
From: spamsucks at Ih8it.com (WTH)
Date: Wed, 7 Jan 2004 10:04:29 -0500
Subject: ProtoCiv: porting Freeciv to Python
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bsfmms$ckcfu$1@ID-207230.news.uni-berlin.de>
	<pan.2003.12.25.23.08.46.632062@fakeemail.com>
	<bsglco$cskls$1@ID-207230.news.uni-berlin.de>
	<3fec66f1$0$967$a1866201@newsreader.visi.com>
	<3feddb73$1@news.012.net.il>
Message-ID: <HbVKb.145$TR6.31@bignews3.bellsouth.net>

> >    Prototyping != implementing.
>
> Well, duh!
>
> g

That is a VERY important distinction, and not a 'duh' type of statement.

    WTH




From reply.in.the.newsgroup at my.address.is.invalid  Sat Jan  3 08:57:50 2004
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Sat, 03 Jan 2004 14:57:50 +0100
Subject: Speed?
References: <efa6f675.0401021920.3bffced0@posting.google.com>
	<mailman.41.1073113311.12720.python-list@python.org>
Message-ID: <3fidvvkl6u5iohdocs22sog32bgj4pqkjp@4ax.com>

EP:
>I previously read some comparisons which did not show Python in a good light 
>in this regard: i.e. Python is slow compared to Perl, C++, Java.

These are usually pure compute benchmarks at the interpreted language
level. In practice I find that my Python programs perform somewhat better
than Java, probably because Python has many libraries implemented in C,
whereas Java has many pure Java libraries.

-- 
Ren? Pijlman


From astrand at lysator.liu.se  Sun Jan  4 06:02:59 2004
From: astrand at lysator.liu.se (Peter Astrand)
Date: Sun, 4 Jan 2004 12:02:59 +0100 (CET)
Subject: [Python-Dev] PEP 324: popen5 - New POSIX process module
In-Reply-To: <3FF75AFC.3020204@v.loewis.de>
Message-ID: <Pine.LNX.4.44.0401041008420.6860-100000@aristocat.lysator.liu.se>

On Sun, 4 Jan 2004, Martin v. Loewis wrote:

> > "Fixing popen2" would mean a break old applications; exceptions will 
> > happen, which apps are not prepared of. 
> 
> I find that an acceptable incompatibility, and it will likely break
> no existing application. 

Not true. There are lots or apps out there that uses fallback commands:  
tries to execute one, and if it doesn't exist, tries another one. (One
example is jakarta-gump, see
http://cvs.apache.org/viewcvs.cgi/jakarta-gump/python/gump/utils/launcher.py?rev=1.6&view=auto)  
With the current API, you do this by checking if the return code is 127.
No-one is prepared for an exception.

The return code stuff is also very problematic, and is another reason why 
make a new module and not "enhance" the old ones. With the current API 
(which calls /bin/sh most of the time), some returncodes are overloaded by 
the shell. The shell uses these return codes:

126: the command was found but is not executable
127: the command was not found
128+n: the command was terminated by signal n

This means that it is currently impossible to use these return codes for 
programs launched via the current API, since you cannot tell the 
difference between a 127 generated by a successful call to your command, 
and a 127 generated by the shell. 

I don't see how this can be solved by "enhancing" the current functions, 
without breaking old applications. 


>Applications usually expect that the program
> they start actually exists; it is a good thing that they now can
> detect the error that the missing/non-executable application.

There are lots of other errors as well, not just missing/non-executable 
programs. 


> > There is no one flexible enough. The 
> > case for redirecting only stderr is just one example; this is simple not 
> > possible with the current API. 
> 
> Can you elaborate? What is the specific problem, how does your preexec
> function look like, and how is it used with popen5. I can then show you
> how it could be used with popen2, if that was enhanced appropriately.

Yes, the preexec function feature could possiby be added popen2. This is 
not the problem. 


> >>Sounds like a new function on the popen2 module.
> > 
> > 
> > To support all combinations, 12 different functions are necessary. Who 
> > will remember what popen2.popen11() means? 
> 
> Why is that? Just add a single function, with arguments
> stdin/stdout/stderr. No need for 12 functions. Then explain the existing
> functions in terms of your new function (if possible).

Just like popen5.Popen? Yes, that could be done. We would still have the 
problem with returncode incompatibilites, exceptions and such. 


> > With popen5, you can do it *without* using the shell. 
> 
> Why is that a good thing?

1) Performance. No need for parsing .bashrc on every call...

2) Security. You can do pipes without having to deal with all the quoting
   issues.

3) Getting rid of the shells overloading of return codes

It's also much more elegant, IMHO. 


> I think this is the core problem of your approach: You throw away all
> past history, and imply that you can do better than all prior
> contributors could. Honestly, this is doubtful. 

In a discussion like this, I think it's important to separate the new API 
from the new implementation:

1) The new API. If you look at the popen5 implementation and PEP, it's 
obvious that I haven't throwed away the history. I have tried to take all 
the good parts from the various existing functions. The documentation 
contains 140 lines describing how to migrate from the earlier functions. 

Much of the current API has really never been designed. The API for the
functions os.popen, os.system, os.popen2 comes from the old POSIX
functions. These were never intended to be flexible, cross-platform on 
anything like that. So, it's not hard to do better than these. 


2) The new implementation. 

When I wrote popen5, I took some good ideas out of popen2. The rest of the 
code is written from scratch. 


>The current code
> is so complicated because implementing pipes is complicated.

Let's keep the POSIX stuff separated from the Windows stuff. popen2.py 
does not depend on posixmodule.c on POSIX systems, and popen2.py is not 
complicated at all. 

The popen* stuff for Windows (and OS2 etc) in posixmodule.c is complicated 
because:

1) It's written in low-level C

2) It contains lots of old DOS stuff

3) It tries to launch the program through the shell (which is always a 
pain). 


> > Well, I don't see how this could be done easily: The current API is not 
> > flexible enough, and some things (like cross-process exceptions) breaks 
> > compatibility. 
> 
> I never said it would be easy. However, introducing a new popen module
> is a major change, and there must be strong indications that the current
> API cannot be enhanced before throwing it away.

I wouldn't say that introducing a new module is a "major change". 

Of course, we don't want to end up writing "popen6" in two years, because
we've realized that "popen5" is too limited. That's why we should try to
get it exactly right this time. I think it would be more useful it we put
our energy into trying to accomplish that. 


> As for breaking compatibility: This is what the PEP should study in
> detail. It is sometimes acceptable to break compatibility, if
> applications are likely to be improved by the change. *Any* change
> can, in principle, break compatibility. Suppose I had an application
> that did
> 
> from popen5 import open
> 
> This application might break if your proposed change is implemented,
> as a new module is added. So you can't claim "I will break no programs".

Isn't this quite a silly example? 


-- 
/Peter ?strand <astrand at lysator.liu.se>





From bkelley at wi.mit.edu  Fri Jan  9 08:31:01 2004
From: bkelley at wi.mit.edu (Brian Kelley)
Date: Fri, 09 Jan 2004 13:31:01 GMT
Subject: How to insert into listbox using wxPython
In-Reply-To: <vvrec7d5bs4ve6@corp.supernews.com>
References: <vvr25kjnd5n397@corp.supernews.com>
	<3ffda907$0$572$b45e6eb0@senator-bedfellow.mit.edu>
	<vvrec7d5bs4ve6@corp.supernews.com>
Message-ID: <p2yLb.5996$5V2.10467@attbi_s53>

Andrew wrote:
> Hi thanks for your help but I am still having problems basically I am using
> a button to connect to a Database and I want to display the data from the
> database into the listbox
> Here is the code I am using for the button
> 
>         self.c = self.db.cursor()
>         self.c.execute("SELECT * FROM guests;")
>         self.results = self.c.fetchall()
>         # Here is where I don't know what to do I want to be able to get the
> data from self.results and display it in the listbox
>         self.listbox.Append('')
>         self.listbox.Set([''])

It looks as though you are putting nothing in the listbox.

Append('') adds a blank
and listbox.Set(['']) replaces the listbox with a blank.

Try:
for x in self.results:
     self.listbox.Append(x[0])

Brian




From quentel.pierre at wanadoo.fr  Fri Jan  2 03:58:01 2004
From: quentel.pierre at wanadoo.fr (Pierre Quentel)
Date: Fri, 2 Jan 2004 09:58:01 +0100
Subject: Multiple exception syntax
Message-ID: <bt3bqr$j84$1@news-reader5.wanadoo.fr>

Normally in Python there is no need to write parenthesis for a tuple :
a,b,c=(1,2,3)
(a,b,c)=1,2,3

are the same, and so are :

for (x,y) in enumerate(aList)
for x,y in enumerate(aList)

But with "except" the behaviour is very different with or without
parenthesis :
- "except x,y" means : if exception x is raised, then y is the instance of
the x class holding information about the exception
- "except (x,y)" means : if one of the exceptions x or y is raised (or both)

So it took me some time to figure out why this code was wrong :

----------------------
1  import ConfigParser
2  conf=ConfigParser.ConfigParser()
3  conf.read("config.ini")
4
5  try:
6      PORT=conf.get("Server","port")
7  except ConfigParser.NoOptionError,ConfigParser.NoSectionError:
8      PORT=80
9
10 try:
11     language=conf.get("Translation","language")
12 except ConfigParser.NoOptionError,ConfigParser.NoSectionError:
13     language="default"
----------------------

In my config.ini there was a [Server] section but no "port" option, and no
[Translation] section. I had this very puzzling traceback :

Traceback (most recent call last):
  File "C:\Pierre\Programmes Python\multipleExceptBug.py", line 11
, in ?
    language=conf.get("Translation","language")
  File "C:\Python23\lib\ConfigParser.py", line 505, in get
    raise NoSectionError(section)
AttributeError: NoOptionError instance has no __call__ method

My bug was in line 7, where ConfigParser.NoSectionError becomes an
instance of the NoOptionError class. With parenthesis on line 7 (and 12)
it works all right

I find this confusing. It would be clearer for me to have :

"except Error1 or Error2 or Error3"

Or have I drunk too much lately ?
Pierre




From __peter__ at web.de  Tue Jan 27 04:48:07 2004
From: __peter__ at web.de (Peter Otten)
Date: Tue, 27 Jan 2004 10:48:07 +0100
Subject: Confusing problem between Tkinter.Intvar() and self declared
	variable class
References: <4378fa6f.0401261709.664ca799@posting.google.com>
Message-ID: <bv5bvo$k0h$03$1@news.t-online.com>

Marc wrote:

> Hi all,
> 
> I was using Tkinter.IntVar() to store values from a large list of
> parts that I pulled from a list. This is the code to initialize the
> instances:
> 
>     def initVariables(self):
>         self.e = IntVar()
> 
>         for part, list in info.masterList.items():
>             obj = setattr( self.e, part, IntVar() )

It seems odd to use an IntVar as a container for IntVar instances.
obj will always be set to None; just use setattr().

> 
> That allowed me to save bundles of info without having to create
> another large dictionary or list. I was using the variable in entry

A Python object is just a dictionary in disguise.

> boxes to store the amount of parts ordered:
> 
>      Entry( cscGroup.interior(), width=3, textvariable =
> getattr(self.e, part),
>                            text=e.get()).grid(row=x, column=2, padx=4
> )
> 
> However, I ran into problems when I tried to pickle the instances in
> order to recall them later. To fix that problem I created my own
> simple data class that allowed me to save the data the same way while
> also having the ability to pickle it:
> 
> class DataVar:
>     def __init__(self):
>         self.data = 0
>         self.partName = ""
> 
>     def set(self, value):
>         self.data = value
> 
>     def get(self):
>         return self.data
> 
> But I just discovered another problem. It doesn't appear to hold data
> the same way. The information appeared global when it was IntVar().
> Now when I go outside the class that set up the entry boxes, the
> information does not appear to be in DataVar. I print out the info the
> following way:
> 
>     def printValues(self):
>         for part, list in info.masterList.items():
>             e = getattr(self.e, part)
>             print str(part) + " --->" + str( e.get() )
> 
> This function is in the same class that initialized the DataVar
> variables and also that called the class that setup the window to
> enter the amount of parts. When I call that class I pass in the
> variable in the following way:
> 
>        spares = Spares(self.master, self.e)
> 
> So obviously there's something about Tkinter that causes the info to
> be global. But even though the DataVar class is an independent class,
> for some reason the information is not being maintained.
> 
> Does anyone have any idea why this is happening and how to fix it?

I wasn't able to completely follow the last part of your post, so below is a
working version of what I /think/ you are trying to do. The important part
is a pickle-enhanced container for IntVars that stores their values instead
of the instances. It could easily be enhanced to support, say, StringVar by
inspecting the type of the values in the __setstate__() method.

<crocodile.py>
import Tkinter as tk
import pickle

class Namespace:
    pass

class IntVars:
    """ Every attribute is suposed to be a TKinter.IntVar instance """
    def __getstate__(self):
        d = dict(self.__dict__)
        for k in d:
            d[k] = d[k].get()
        return d
    def __setstate__(self, d):
        for k, v in d.iteritems():
            iv = tk.IntVar()
            iv.set(v)
            setattr(self, k, iv)

info = Namespace()

info.masterDict = {
    "bird": 1,
    "elephant": 2,
    "crocodile": 3,
}

FILENAME = "crocodile.pickle"

class LoadError(Exception): pass

class Main(tk.Frame):
    def __init__(self, master=None):
        tk.Frame.__init__(self, master)
        self.grid()
        try:
            self.loadVariables()
        except LoadError:
            self.initVariables()
            self.saveVariables()
        self.initControls()

    def loadVariables(self):
        try:
            f = file(FILENAME)
        except IOError:
            raise LoadError
        else:
            # error handling is *incomplete*
            try:
                self.e = pickle.load(f)
            finally:
                f.close()

    def saveVariables(self):
        f = file(FILENAME, "wb")
        try:
            pickle.dump(self.e, f)
        finally:
            f.close()

    def initVariables(self):
        self.e = IntVars()
        for part, lst in info.masterDict.iteritems():
            iv = tk.IntVar()
            iv.set(lst)
            setattr(self.e, part, iv)

    def initControls(self):
        interior = self # cscGroup.interior()
        x = 0
        for part, lst in info.masterDict.iteritems():
            e = tk.Entry(interior, width=3,
                textvariable=getattr(self.e, part)) # text=... has no effect
            e.grid(row=x, column=2, padx=4)
            x += 1

        self.button = tk.Button(self, text="Save values",
            command=self.saveVariables)
        self.button.grid(row=x, column=2, padx=4)

m = Main()
m.mainloop()
</crocodile.py>

Peter


From reply.in.the.newsgroup at my.address.is.invalid  Sat Jan 10 20:49:08 2004
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Sun, 11 Jan 2004 02:49:08 +0100
Subject: Writing Files
References: <AJULb.1380$q4.460@newsread3.news.atl.earthlink.net>
Message-ID: <2pa100t1laeuhv0g1m3lafif7me0mg5tt8@4ax.com>

Lucas Raab:
>What is the best way to go about writing to files??

f.write()

http://www.python.org/doc/current/tut/node9.html#SECTION009200000000000000000

>Whenever I insert a statement to write results to a file there's 
>nothing in it.

There must be something wrong with the statement.

-- 
Ren? Pijlman


From msurette at laframboise.net  Mon Jan 26 17:07:36 2004
From: msurette at laframboise.net (Michael Surette)
Date: Mon, 26 Jan 2004 22:07:36 GMT
Subject: pexpect exceptions
Message-ID: <pan.2004.01.26.22.07.43.147063@laframboise.net>

I have been trying to automate the changing of passwords using python and
pexpect.  I wrote a script as a test and it works, except that it gives me
an exception when it stops running:

Exception exceptions.OSError: 
(10, 'No child processes') in <bound method spawn.__del__ of
<pexpect.spawn instance at 0x403d938c>> ignored

What is happening and how do I get rid of the exception?

I am running python 2.3.2 under Slackware linux 9.1 and pexpect 0.99. 
Here is the script:

#!/usr/bin/python
import pexpect
import sys

if len(sys.argv) != 3:
  print 'usage error!'
  raise SystemExit

name= sys.argv[1]
passwd= sys.argv[2]

a= pexpect.spawn('passwd %s'%name)

changed= False
while not changed:
  i= a.expect(['[Nn]ew password:','[Cc]hanged'])
  if i == 0:
    a.sendline(passwd)
  elif i == 1:
    changed= True


From Sambo at connection.com  Tue Jan  6 19:30:10 2004
From: Sambo at connection.com (Sam)
Date: Tue, 06 Jan 2004 16:30:10 -0800
Subject: Finaly found a simple enough task for python, took the plunge,
	but..... 
Message-ID: <3FFB5312.1030803@connection.com>

Only 2 weeks messing around with it ( thanks to programs like SYNCHRONEX and 
BITORRENT ), and already trying to create windows ( the paths are just too long 
for me to want to type them ).
After much trial and error I finaly got the following code to open the 'get dir'
dialog , but I am getting another blank window titled 'tk' and "NOT RESPONDING"
When I kill it (end task), I get reiniit/restart (CTRL+F6) in my shell window
What am I doing wrong? Do I need to do anythink to clean up after using the 
dialogs?

**********************************************************************************
import os
import sys
import tkCommonDialog

def me():
   dir_name = ""

   getfileDLG = tkCommonDialog.Dialog()
   getfileDLG.command = "tk_chooseDirectory"
   getfileDLG.__init__()
   dir_name = getfileDLG.show( )

   print dir_name

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

The other think is that the dialog does not get focus.	

Must admit I was little more confortable with the HTML help in Python 2.3 
however less informative ( which I only installed a week before 2.3.3)
The help server in 2.3.3 just produces blank pages (most of the time) and 
eventualy locks up. I think it has to do with the loopback, I read about 
somewhere, but I can't be dialed to my ISP all the time.


Thanks, Sam.



From sancelot at free.fr  Fri Jan 16 02:42:05 2004
From: sancelot at free.fr (stephane ancelot)
Date: Fri, 16 Jan 2004 08:42:05 +0100
Subject: wxPython worries
In-Reply-To: <92c59a2c.0401152257.5b93167b@posting.google.com>
References: <mailman.352.1074092092.12720.python-list@python.org>
	<92c59a2c.0401152257.5b93167b@posting.google.com>
Message-ID: <200401160842.05418.sancelot@free.fr>

Hi,
I have recently evaluated wxpython because I am coming from fox (for 3 years) 
, but fox lacks GUI designer and wxwindows with wxpython and boa-constructor 
seems to solve the problem

Thanks for your advice in wxwindows.

If you want informations about fox I can help you.

Best Regards 
steph


Le Vendredi 16 Janvier 2004 07:57, MetalOne a ?crit :
> I have recently been trying to build some GUIs with wxWindows.  The
> first problem that I ran across involved not being able to send and
> event from a worker thread to the GUI thread and get the GUI thread to
> process the event while the user had a menu pulled down.  I wrote a
> bug report and this has since been fixed.  Tkinter has issues here
> also.  There is no means for a worker thread to put an event in the
> GUI thread.
>
> The second problem that I have run across is that tab order between
> controls is the order that controls are added.  You can't get tabbing
> to skip a control.  If you dynamically add/remove controls you can't
> achieve your desired tab order.
>
> wxWindows seems like a very impressive work.  The demo is certainly
> impressive.  I also suppose I shouldn't rant to much about something
> that is free.  However my first two GUIs hit critical problems, and
> these were really simple GUIs.  Granted, the first problem has been
> fixed now, and I have not yet written a bug report on the second.
>
> Tkinter is also giving me problems.  I have been trying to add
> controls to a canvas and to have a scrollbar that will scroll the
> controls on the canvas.  I think I have it figured out now, but it is
> damn near impossible to figure out from the documentation.  I had to
> scour the internet looking for solutions.
>
> I have also played with displaying video in both wxWindows and Tk.
> I have raw gray scale data simply as a list of values range 0-255.
> Using PIL I can easily convert to a format wxWindows and Tk can
> display.  I get around 30 fps with wxWindows and 15 fps with Tk.
> However, all images wxWindows displays must be full 24-bit color.  If
> the images didn't need to be expanded to (r,g,b) I would expect
> signifcant speed up.  I don't know why Tk is so much slower.
>
> wxWindows and Tk are the only toolkits that wrap native Windows
> controls.  The others all emulate controls.  I am thinking about
> trying out another toolkit.
> FOX, FLTK or GTK.
>
> I am having enough trouble convincing people to use Python.  I'd never
> be able to get my work to purchase Qt.  They would prefer to do
> everything in VB6.




From anton at vredegoor.doge.nl  Thu Jan 29 04:12:29 2004
From: anton at vredegoor.doge.nl (Anton Vredegoor)
Date: Thu, 29 Jan 2004 10:12:29 +0100
Subject: Rookie question about data types (hashtables)
References: <Xns947EF14E03FAEgeneralsteveperkins@130.133.1.4>
	<dv0Sb.135681$sv6.731227@attbi_s52>
Message-ID: <4018cf7b$0$132$3a628fcd@reader1.nntp.hccnet.nl>

Rainer Deyke" <rainerd at eldwood.com> wrote:

>>     What I would LIKE to have is a hashtable-like structure that lets
>> me retrieve multiple values based on a partial key.

>Sounds like a sorted list would work best.  A binary search (see the bisect
>module) lets find all matches in O(log n) time.

Probably yes. I'm replying just in case someone would like to have
their hash values sorted in alphabetical order too. The code below
might be of interest to hobbyist programmers who don't care about
practical issues :-) (also not tested beyond what you see)

Anton

from string import ascii_lowercase as alc

def antonian_sorted_unrank(k,base,ndig):
    res = []
    while k > -1 :
        r,k = divmod(k,int('1'*ndig,base))
        k,ndig = k-1,ndig-1
        res.append(r)
    return res

def antonian_sorted_rank(seq, base,ndig):
    res = 0
    for x in seq:
        res = x*int('1'*ndig,base)+res+1
        ndig -= 1
    return res-1

def word_rank(word,ndig):
    d = [alc.index(c) for c in word]
    return antonian_sorted_rank(d,len(alc),ndig)

def word_unrank(i,ndig):
    L = antonian_sorted_unrank(i,len(alc),ndig)
    return "".join([alc[j] for j in L])

def test():
    L = ["a","ab","aa","b","bab","ba"]
    maxlen = max(map(len,L))
    print L
    def wu(i): return word_unrank(i,maxlen)
    def wr(w): return word_rank(w,maxlen)
    H = map(wr,L)
    print H
    H.sort()
    print H
    R = map(wu,H)
    print R
    L.sort()
    assert L == R
    
if __name__=='__main__':
    test()



From gabriel.leblanc at a2m.com  Tue Jan 13 12:50:29 2004
From: gabriel.leblanc at a2m.com (Gabriel Leblanc)
Date: 13 Jan 2004 09:50:29 -0800
Subject: System calls over network
Message-ID: <ed58f15a.0401130950.237a0ea1@posting.google.com>

Hello,

I am wondering if there's an easy way to do a system call to a file
that resides on the network.  Say for example I would like to call the
batch file which is located at

\\ComputerName\file.bat

I tried :

>>> import os
>>> os.popen("\\ComputerName\file.bat")
<open file '\ComputerName\file.bat', mode 'r' at 0x007E7760>
>>> os.popen("\\\\ComputerName\\file.bat")
<open file '\\ComputerName\install.bat', mode 'r' at 0x007E7B20>

Of course, I replaced ComputerName and file.bat with the correct
paths.

Any idea ?

Thanks !


From ih8spam at spamtrap.com  Thu Jan 15 08:58:33 2004
From: ih8spam at spamtrap.com (WTH)
Date: Thu, 15 Jan 2004 08:58:33 -0500
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
	<40047290$1@news.012.net.il>
	<bu29ea$ct54l$1@ID-207230.news.uni-berlin.de>
	<40051cb3$1@news.012.net.il>
	<bu4cm9$dgsp0$1@ID-207230.news.uni-berlin.de>
	<40067838$1@news.012.net.il>
Message-ID: <100d70ho5p7c577@corp.supernews.com>

> Ok, I'll bite. I just invested 0$ on a 3D shooter. I started working on
it,
> and the math was too hard. I gave up after 5 minutes. Do I qualify?

Why didn't OSS flock to satiate your every desire?  Shiftless bunch of
bastards that lot...

    WTH




From http  Sat Jan 10 04:15:53 2004
From: http (Paul Rubin)
Date: 10 Jan 2004 01:15:53 -0800
Subject: need help translating a PHP for statement to python
References: <a015bde3.0401100050.3e6b58c9@posting.google.com>
Message-ID: <7xk740go52.fsf@ruckus.brouhaha.com>

dmm at machinic.net (Davis Marques) writes:
> I'm translating some PHP scripts to Python and have hit a roadblock
> with a for statement.  If someone could explain to me how one should
> translate the multiple increment, evaluations, etc. in the first line
> I would appreciate it deeply ...
> 
> for ($y = 0, $x = $cx-$cy-1; $y <= $cy; ++$y,++$x) {
>     $prd = $q * $y_ar[$y] + $car;
>     $prd -= ($car = intval($prd / 1E7)) * 1E7;
>     if ($bar = (($x_ar[$x] -= $prd + $bar) < 0)) $x_ar[$x] += 1E7;
>     }

Python is more verbose than PHP when it comes to stuff like that.
You have to expand things:

    x = cx - cy - 1
    for y in xrange(cy+1):
         prd = q * y_ar[y] + car;
         car = intval(prd / 1E7)
         prd -= car * 1E7;
         x_ar[x] -= prd + bar
         bar = (x_ar[x] < 0)  # is this REALLY what you wanted?
         if bar: 
            x_ar[x] += 1E7;
         x += 1

You can more closely approximate the two parallel loops with the
iterzip function in the new itertools package, but that only works
with the latest Python versions.

I suspect that your if statement was actually supposed to say

     if (($bar = ($x_ar[$x] -= $prd + $bar)) < 0) $x_ar[$x] += 1E7;

but I don't know what you're really trying to do.


From tdelaney at avaya.com  Thu Jan  8 22:24:36 2004
From: tdelaney at avaya.com (Delaney, Timothy C (Timothy))
Date: Fri, 9 Jan 2004 14:24:36 +1100
Subject: xrange() syntactic sugar
Message-ID: <338366A6D2E2CA4C9DAEAE652E12A1DE0106382C@au3010avexu1.global.avaya.com>

> From: Christopher T King
> 
> for i in xrange(0,8,2):
> 	pass
> 
> is equivalent to
> 
> for i in 0:8:2:
> 	pass 

This exact syntax has been suggested and rejected a few times now ... it's been suggested a few times on python-dev as well by various luminaries/ I don't think there's a PEP for it though (there probably should be). 

> xrange() objects become an acceptable list index, operating as a slice
> operator does. Example:
> 
> a[0:8:2] is equivalent to a[xrange(0,8,2)]

Urgh! Try instead a[slice(0, 8, 2)} ...

xrange is probably going to be gradually phased out - it's anomalous in this day and age of iterators, generators and other much more general constructs. Instead, range is more likely to be optimised once we've got rid of the option to modify other modules directly (i.e. once you can't rebind __builtins__.range it can be optimised in those cases where it's just used in a for: loop - the most common case).

Tim Delaney



From theller at python.net  Thu Jan 15 14:38:41 2004
From: theller at python.net (Thomas Heller)
Date: Thu, 15 Jan 2004 20:38:41 +0100
Subject: keeping Python code properly indented
References: <3064b51d.0401151125.711ade4c@posting.google.com>
Message-ID: <oet5c88u.fsf@python.net>

beliavsky at aol.com writes:

> How do you keep Python code properly indented as you modify it? I use
> an Emacs-type editor that has a Python mode, so the initial indenting
> is easy. If I later want to put a 'for' loop (or an 'if' statement)
> around a bunch of code, I find myself going through the body of the
> loop, manually re-indenting to keep the nested loops correct. There
> should be a better way.
>
> I think that having a 'for' loop end with a matching 'next' statement,
> as done in (for example) Basic, is a safer and clearer way of writing
> loops, although some Python programmers consider this a 'feature'
> rather than a 'bug'.

In Xemacs with python-mode, I just mark the region and hit 'C-c >'
py-shift-region-right or 'C-c <' py-shift-region-left.

Thomas


From jsbenson at bensonsystems.com  Thu Jan  1 15:01:15 2004
From: jsbenson at bensonsystems.com (John Benson)
Date: Thu, 1 Jan 2004 12:01:15 -0800
Subject: question: Python or Lua for rejuvenation of old PCs?
Message-ID: <028e01c3d0a2$037aba80$6401a8c0@jsbwxp3>

Hi, I've been experimenting with Lua on my Tandem Himalaya K100 system (a
decade-old 4-CPU fault-tolerant server from Tandem/Compaq/HP) because it
looked like it was simpler to port than Python. Since I've only got 128 MB
per CPU and the system is already loaded with SQL and transaction processing
monitor software, it's small footprint was also very attractive. Anyway
that's how I got interested in Lua.

There has already been some discussion of Lua in this forum. At this stage
in my understanding, I'd characterize it as highly idiosyncratic, but very
dynamic in the same way Python is: it has reference rather than variable
copy semantics and functions are first-class objects. It can do OOP, but
data and method packaging are shoehorned into a somewhat complicated Swiss
Army Knife table construct. It's indexes are also unity-based and there are
no slices as in Python. However, it's sufficiently different that it
shouldn't be too hard keeping the two languages separate, unlike, say
Spanish and Portuguese.

That said, I had a project in the back of my head of putting Python on my
old PCs ranging from 4MB up to 128 MB RAM as a last-ditch attempt to avoid
facing reality and getting rid of them. However, I'm now beginning to wonder
if I would be better served by putting Lua on the low-end PCs instead. I'm
thinking of using them as nodes in a distributed, fault-tolerant home
monitoring and control system that would be easy to port later to embedded
microcontrollers.

I suppose that my question is best phrased as this: What is a comfortable
minimum RAM size that a PC needs to have to comfortably run modern Python
for non-memory-intensive applications (i.e. no big database crunching or
other thrashy stuff). I'm thinking about just polling sensors and actuating
control devices over RS-232/RS-485/LAN and doing some chitchat between the
nodes over the LAN. Based on the response, I'll draw the line between my Lua
machines and my Python machines.

Thanks in advance for any information you may have.





From usenet at -OBFUSCATED-joefrancia.com  Sun Jan 25 14:58:49 2004
From: usenet at -OBFUSCATED-joefrancia.com (Joe Francia)
Date: Sun, 25 Jan 2004 19:58:49 GMT
Subject: Need Python script to search content in the web pages
In-Reply-To: <e2a890ee.0401250942.153b1a73@posting.google.com>
References: <e2a890ee.0401250942.153b1a73@posting.google.com>
Message-ID: <ZdVQb.5623486$be.912814@news.easynews.com>

SA wrote:
> Hello
> 
> I need a python script that can enable users of a site to search
> through the contents of the website.
> 
> Can anyone help?
> 
> --SA

http://www.divmod.org/Lupy/index.html


From aahz at pythoncraft.com  Thu Jan 29 12:02:28 2004
From: aahz at pythoncraft.com (Aahz)
Date: 29 Jan 2004 12:02:28 -0500
Subject: Pythonwin - breaking out of infinite loop
References: <40193737$0$13350$ed9e5944@reading.news.pipex.net>
Message-ID: <bvbeb4$gk9$1@panix2.panix.com>

In article <40193737$0$13350$ed9e5944 at reading.news.pipex.net>,
Graham <gsmith at oxfam.org.uk> wrote:
>
>How do I stop a Python program running in PythinWin?  I would expect to be
>able to use CTR-C or CTRL-break etc.

That should work, but there are some oddball cases where Python won't
check for the signal.  Here's a simple example:

    while 1:
        pass
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

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


From latex-bugs at latex-project.org  Fri Jan 30 10:24:59 2004
From: latex-bugs at latex-project.org (latex-bugs at latex-project.org)
Date: Fri, 30 Jan 2004 16:24:59 +0100 (CET)
Subject: hello
In-Reply-To: <200401301524.i0UFOSZ4003976@rzdspc1.informatik.uni-hamburg.de>
References: <200401301524.i0UFOSZ4003976@rzdspc1.informatik.uni-hamburg.de>
Message-ID: <200401301524.i0UFOxYX024254@sun.dante.de>

Thank you for your message to latex-bugs at latex-project.org.

Sorry, but to prevent SPAM, the latex-bugs email processor
will accept only messages produced with the help of
latexbug.tex. Please resend your problem report with
the contents of latexbug.msg as the body of your message.

-- 



From EP at zomething.com  Wed Jan 28 23:30:13 2004
From: EP at zomething.com (EP)
Date: Wed, 28 Jan 2004 20:30:13 -0800
Subject: Unique ID for CD or DVD
In-Reply-To: <69TQb.15674$Le1.6291@newssvr27.news.prodigy.com>
Message-ID: <5.2.0.9.0.20040128202513.00b7f330@mail.zomething.com>


Hoang wrote:
>Does anyone know of an existing algorithm/module for generating a unique ID
>for a given CD or DVD?  This would be something akin to CDDB where a CD is
>recognized based on its content.  I could be wrong, but I think CDDB is just
>based on file size or disk size and this alone is not unique enough.  If the
>solution is in Python, all the better.
>
>Hoang Do
>http://jotsite.com


In case its of interest (ICIOT)

I came across this company who is making a business, in part, out of 
digital fingerprinting music http://www.audiblemagic.com/technology.html

This patent might be an interesting read:
http://tinyurl.com/2nuev


Eric 
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From jzgoda at gazeta.usun.pl  Wed Jan 21 15:36:47 2004
From: jzgoda at gazeta.usun.pl (Jarek Zgoda)
Date: Wed, 21 Jan 2004 20:36:47 +0000 (UTC)
Subject: Help, *.CHM, etc
References: <90f2d9db.0401201803.6f2adbf8@posting.google.com>
	<20040120181009.060C.JCARLSON@uci.edu>
	<20040120182610.060F.JCARLSON@uci.edu>
	<100rutd6kge1g9f@corp.supernews.com>
Message-ID: <bumnsu$ppb$1@nemesis.news.tpi.pl>

Michael Geary <Mike at DeleteThis.Geary.com> pisze:

> You had it right with os.startfile. That calls the ShellExecute function in
> Windows, which is the way you would do it in a native Windows application
> written in C.

Only if you don't pretend to be "Real-Hardcore-Win32-Hackah". We use
CreateProcessEx.

-- 
Jarek Zgoda
Unregistered Linux User #-1
http://www.zgoda.biz/ JID:zgoda-a-chrome.pl http://zgoda.jogger.pl/


From dave at pythonapocrypha.com  Mon Jan 26 15:29:32 2004
From: dave at pythonapocrypha.com (Dave Brueck)
Date: Mon, 26 Jan 2004 13:29:32 -0700
Subject: Guardian: open source is a throwback says Jack Schofield
References: <64cff82f.0401251143.328388bd@posting.google.com><mailman.772.1075066543.12720.python-list@python.org><bv1jkf$g46$1@namru.matavnet.hu><bv1pgj$ctl$3@news.service.uci.edu>
	<40156FB6.F71C19B0@engcorp.com>
	<16405.30020.406117.575663@montanaro.dyndns.org>
Message-ID: <090801c3e44b$1b434760$6401fea9@YODA>

Skip wrote:
> Pardon me, but I don't want "a regular guy" in this particular position.  I
> want the god damned smartest, most capable person we can find.

The real problem is that these days there's no way the smartest, most capable
person would ever run for public office.

-Dave




From donn at drizzle.com  Wed Jan 28 01:07:06 2004
From: donn at drizzle.com (Donn Cave)
Date: Wed, 28 Jan 2004 06:07:06 -0000
Subject: raw_input - why doesn't prompt go to stderr
References: <bv2smu$leh$1@nets3.rz.RWTH-Aachen.DE><mailman.816.1075154097.12720.python-list@python.org>
	<4016A585.6050109@skynet.be>
	<mailman.878.1075242374.12720.python-list@python.org>
Message-ID: <1075270024.832201@yasure>

Quoth "Terry Reedy" <tjreedy at udel.edu>:
[... in response to]
|> Tell me any advantage in raw_input's prompt is going to stdout instead
|> of stderr?
|
| I don't know the ramification of the distinction, expecially across
| platforms, well enough to answer.  I can only reiterate my suggestion,
| given Python as it is today and will remain for some time, that you print
| to 'ofile' with default ofile == sys.stdout but with command line or
| interactive redirection.

I don't know either, but agree that the cross platform point is
probably an issue.  If it were strictly a UNIX application, I would
indeed expect prompt on stderr - as well as a lot of other stuff
that now goes to stdout.  But I've heard complaints from the Windows
crowd that stderr output is a nuisance there in some way, and for
sure you couldn't expect MS to appreciate the virtue of this
distinction even if they do somehow observe it.

	Donn Cave, donn at drizzle.com


From nbdy9 at hotmail.com.nospam  Fri Jan 16 12:16:37 2004
From: nbdy9 at hotmail.com.nospam (Nick)
Date: Fri, 16 Jan 2004 12:16:37 -0500
Subject: What's the best Python freeze tool?
Message-ID: <bu969m$jqu$1@news3.bu.edu>

I've tried a couple of Python freeze tool. But encountered some bugs. 
Anyone know what's the most mature Python Freeze tool? Thanks.



From try_vanevery_at_mycompanyname at yahoo.com  Thu Jan 15 00:02:30 2004
From: try_vanevery_at_mycompanyname at yahoo.com (Brandon J. Van Every)
Date: Wed, 14 Jan 2004 21:02:30 -0800
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
	<40047290$1@news.012.net.il>
	<bu29ea$ct54l$1@ID-207230.news.uni-berlin.de>
	<40051cb3$1@news.012.net.il>
	<bu4cm9$dgsp0$1@ID-207230.news.uni-berlin.de>
	<wQlNb.2099$f97.683@fe3.columbus.rr.com>
Message-ID: <bu567o$c29po$1@ID-207230.news.uni-berlin.de>


"R. Alan Monroe" <amonroejj at yahoo.com> wrote in message
news:wQlNb.2099$f97.683 at fe3.columbus.rr.com...
> In article <bu4cm9$dgsp0$1 at ID-207230.news.uni-berlin.de>, "Brandon J. Van
Every" <try_vanevery_at_mycompanyname at yahoo.com> wrote:
> >> >> It
> >> >> was an unbelievable waste of time, since you've managed to convice
> >> >> (maybe still wrongfully) all the people that you are completely
> >> >> clueless.
> >> >
> >> > Why, because I turned around a project in 3 weeks while having the
> >> > flu half the time?
> >>
> >> No, because you dumped the project because it was boring.
> >
> >You're a fool then.  What's your school of advice, keep working on things
no
> >matter how much of a boring waste of time they become?
>
> "Being able to finish something is a form of expertise." --Brandon Van
> Every

Cool, I like that.  I think I even remember saying it.  Keep right on
quoting!

Of course, finishing *something* doesn't mean finishing *everything*.  Only
fools do that.

-- 
Cheers,                     www.indiegamedesign.com
Brandon Van Every           Seattle, WA

20% of the world is real.
80% is gobbledygook we make up inside our own heads.




From jepler at unpythonic.net  Thu Jan 29 11:26:48 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Thu, 29 Jan 2004 10:26:48 -0600
Subject: Get number of iteration
In-Reply-To: <bvbbd7$9rv$01$1@news.t-online.com>
References: <bvbbd7$9rv$01$1@news.t-online.com>
Message-ID: <20040129162648.GD18498@unpythonic.net>

You're looking for the "enumerate" builtin function in 2.3.

    for i, x in enumerate(l):
        print x
        print i
        print "next"

You can define a "poor man's" enumerate in 2.2:

    def enumerate(seq):
        return zip(range(len(seq)), l)

but the enumerate in 2.3 is an iterator, not a sequence.

Jeff



From peter at engcorp.com  Mon Jan  5 15:19:42 2004
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 05 Jan 2004 15:19:42 -0500
Subject: Using revised tempfile module
References: <3fe99ce2$0$4744$61fed72c@news.rcn.com> <878ykx6fss.fsf@pobox.com>
Message-ID: <3FF9C6DE.848146AB@engcorp.com>

"John J. Lee" wrote:
> 
> "Edward C. Jones" <edcjones at erols.com> writes:
> 
> > #! /usr/bin/env python
> >
> > import os, tempfile
> >
> > # I have written code like this several times. It uses the deprecated
> > # function tempfile.mktemp. How do I write this with the new tempfile
> > # functions?
> 
> You read the tempfile.mkstemp documentation.

Or even just re-read the tempfile.mktemp documentation again, which says

Deprecated since release 2.3. Use mkstemp() instead.
  Warning: Use of this function may introduce a security hole in your program. 
  By the time you get around to doing anything with the file name it returns, 
  someone else may have beaten you to the punch. 

-Peter


From http  Wed Jan 21 22:48:13 2004
From: http (Paul Rubin)
Date: 21 Jan 2004 19:48:13 -0800
Subject: Converting a string to integer/float
References: <2981adb9.0401211943.e1ae272@posting.google.com>
Message-ID: <7x7jzkhcea.fsf@ruckus.brouhaha.com>

aprogrammer at fastmail.fm (Ikot) writes:
> I am stuck with a problem, might be very trivial, to ask here, but
> dont find a way out. I read a string like 12345.678 from a text file,
> which will be string for me, but how do I convert it into a float for
> my use ?

s = '12345.678'
x = float(s)


From hokiegal99 at hotmail.com  Mon Jan  5 18:12:01 2004
From: hokiegal99 at hotmail.com (hokiegal99)
Date: Mon, 05 Jan 2004 18:12:01 -0500
Subject: local interpreter remote machines
References: <btcka7$phd$1@solaris.cc.vt.edu>
	<3ff9e4b8$0$318$e4fe514c@news.xs4all.nl>
Message-ID: <3FF9EF41.8040804@hotmail.com>

Irmen de Jong wrote:
> hokieghal99 wrote:
> 
>> This may not be possible, but I thought I'd ask anyway. Could I get 
>> the below code to run on a Python server where other machines would 
>> connect to it (say thru the Web) and get details of *their* system 
>> instead of the system details of the machine that the interpreter is 
>> running on? Any ideas?
> 
> 
> If you also have Python running on the other machine,
> you can do this very easily with Pyro: http://pyro.sourceforge.net
> (no network programming necessary at all).
> 
> Essentially you create an object on the remote machine that contains
> a method with the code you want to execute, and you call that object
> -using Pyro- as if it was located on your own computer.
> 
> But this only works if you have a supported Python version running
> on the remote machine, and that you are allowed to connect to that
> machine over the network.
> 
> You can even create some python code on your local machine, and
> actually submit that to the other machine, let it deal with it,
> and then get the results back.
> But only do this if you know that no unauthorised user can do this,
> because this is a security risk.
> 
> --Irmen de Jong.

Thank you, this is exactly what I was looking for!





From jkrauze at ccs.neu.edu  Wed Jan 28 16:02:34 2004
From: jkrauze at ccs.neu.edu (Joseph Krauze)
Date: Wed, 28 Jan 2004 16:02:34 -0500
Subject: executing an external app
Message-ID: <Pine.GSO.4.58.0401281558280.26750@denali.ccs.neu.edu>

Hi all,

I have a simple question which I cannot solve (relatively new to Python).
I want to write a script that executes an application on the go.  I looked
into the exec*e() calls but the problem there is that they do not return.
I also looked into execfile() but here the PATH is not taken into account
and I couldn't figure out to pass the file that's executed arguments.

So, is there a simple way to execute an external app?
i.e. execvpe('cat', 'myFile') - this will not return

Thanks,
Joseph


From ssnews at softel.co.uk  Mon Jan  5 09:03:22 2004
From: ssnews at softel.co.uk (Simon Steele)
Date: 5 Jan 2004 06:03:22 -0800
Subject: Embedding Python with Dynamic Loading (win)
Message-ID: <5e571368.0401050603.265d469d@posting.google.com>

Hi,

I'm trying to embed python into my application, and have everything
working fine using the static import lib. However, I don't want my
application to be dependant on python being installed (it's an
optional script interpreter). Therefore I want to be able to
dynamically load python instead (which I believe is possible, but I
can't find any examples for). It seems, however, that the import lib
is imported in python.h using a pragma statement.

1. Is there any suggested way to prevent this import without modifying
python.h?

2. Does anyone have a modified python.h which uses LoadLibrary /
dlopen that they'd be willing to share to save me from writing my own?

3. Has anyone had any success dynamically loading python and using
swig modules in the same process (just to check I'm not insane for
trying this)?

thanks in advance,

Simon.

-- 
Simon Steele
Programmers Notepad - http://www.pnotepad.org/


From swalters_usenet at yahoo.com  Thu Jan 15 01:06:47 2004
From: swalters_usenet at yahoo.com (Samuel Walters)
Date: Thu, 15 Jan 2004 06:06:47 GMT
Subject: confusion about Exception Mechanism
References: <bu4qhr$dbqj3$1@ID-221199.news.uni-berlin.de>
Message-ID: <pan.2004.01.15.06.05.19.927811@yahoo.com>

| Zachary said |

> Hello,
> I'm relatively new at Python, and am slightly confused about how the
> try...except mechanism is supposed to work.  I am just not sure how it
> would be used, as it just seems that it is another sort of loop.  Is their
> any sort of example I could look at, that has an example of how it is
> applied? I haven't really seen any such full example. Thanks, And Sorry
> for the newbie Question, Zack

When I first encountered exceptions, they were a bit confusing for me too.

Exceptions are failsafes that allow a program to sensibly deal with
errors.  When something goes wrong, Python won't just spit out an error
message.  First it "raises an exception."  You may also hear people call
that throwing an exception.  A try block allows you to "catch" that
exception and deal with it yourself.  In a way, it's the program sending
out a cry for help.  By putting something in a try block, you're saying
that you're willing to answer that cry.

For instance: (stolen from the tutorial page)

import sys

try:
    f = open('myfile.txt')
    s = f.readline()
    i = int(s.strip())
except ValueError:
    print "Could not convert data to an integer."
except IOError, (errno, strerror):
    print "I/O error(%s): %s" % (errno, strerror)
except:
    print "Unexpected error:", sys.exc_info()[0]
    raise


You put the code you're willing to handle exceptions (errors) for between
try and except.  The first except (there only needs to be one, there may
be multiple) says that if the block of code encounters a "ValueError" problem,
that we will print "Could not convert data to an integer." and then keeps
moving along in the program.  The second except block handles IOError
exceptions, and also gets some extra information from those exceptions. 
It stores this extra information in "errno" and "strerror".  It then
prints some information about what exactly went wrong and continues
running the program.  The last except block catches any and every error
that wasn't caught before it.  It will print an error message, then the
statement "raise" falls back on the next line of defense of errors.  Since
this bit of code may itself be inside a try block, maybe the program will
handle it elsewhere.  If there's no other try blocks to handle an
exception, then, and only then, will Python spit out an error message and
stop the program.

There's other pieces to this puzzle, but they're all on the tutorial page
pointed out elsewhere.  Hopefully this will give you some sense of bearing
while reading that.

HTH

Sam Walters.

-- 
Never forget the halloween documents.
http://www.opensource.org/halloween/
""" Where will Microsoft try to drag you today?
    Do you really want to go there?"""



From candiazoo at comcast.net  Fri Jan  2 12:46:51 2004
From: candiazoo at comcast.net (Zoo Keeper)
Date: Fri, 02 Jan 2004 17:46:51 GMT
Subject: Problem building on BeOS...
References: <NLhJb.31440$I07.78784@attbi_s53>
	<bt4a9t$13e4$1@ulysses.news.tiscali.de>
Message-ID: <f8iJb.42537$xX.145398@attbi_s02>

Thanks for the reply!  I checked in my editor (pe) and it indicates just a
carriage return at the end of the line (visibles and tab stops on).

Mike

In message <bt4a9t$13e4$1 at ulysses.news.tiscali.de>, Uwe Hoffmann wrote:
> Zoo Keeper wrote:
> > For some reason, the Python preprocessing balks on the "\" line
> continuation
> > character.  Any ideas/thoughts?  Is it just that my version of gcc is not
> > supported?
> 
> > In file included from
> /boot/home/Downloads/Numeric-23.1/Src/_numpymodule.c:4:
> > /boot/home/Downloads/Numeric-23.1/Include/Numeric/arrayobject.h:234:
> stray '\'
> > in program
> 
> no knowledge of beos, but maybe your files have the "wrong" line ending
> (e.g. \r\n instead of \n or something like that)
> 




From ashleylloyd at hotmail.com  Wed Jan  7 05:07:41 2004
From: ashleylloyd at hotmail.com (Ashley Lloyd)
Date: Wed, 07 Jan 2004 10:07:41 +0000
Subject: Newbie: BLOB Fields into Interbase Database
Message-ID: <BAY99-F51a0osA91E9G0002e980@hotmail.com>

Hi,

Anyone got any hints as to how to insert BLOB data into an interbase db 
using kinterbasDB? We've found something about using gvib, but would prefer 
to use kinterbasDB if possible?

TIA

Ashley

_________________________________________________________________
It's fast, it's easy and it's free. Get MSN Messenger today! 
http://www.msn.co.uk/messenger




From eltronic at juno.com  Sun Jan  4 00:21:24 2004
From: eltronic at juno.com (eltronic at juno.com)
Date: Sun, 4 Jan 2004 00:21:24 -0500
Subject: Recurring dates module [was: Project dream]
Message-ID: <20040104.002126.-3883603.2.eltronic@juno.com>

On Sat, 3 Jan 2004 15:40:55 -0800 "Robert Brewer" 
<fumanchu at amor.org> writes:
> > eltronic at juno.com wrote:
> > > a timer capable of alarms or starting programs with
> > > various ways of specifying the event, weekly monthly 
> > > don't start until, stop after date, user defined, etc.
> 
> Then I responded:
> > I've been needing to write this, as well, for my own apps. Here is 
> a
> > first attempt (*very* alpha); feedback/additions appreciated.
> > 
> > http://www.aminus.org/rbre/python/recur.py
> > http://www.aminus.org/rbre/python/test_recur.py
> 
> I updated this today, including time functions in addition 
> to the date functions and generally "filling in the corners".
> I also included 
> an interval calculation function for e.g., threading.Timer.

rats, datetime IIR is only py2.3 unless it already works in py2*
or some kind soul has backported it ala sets and some of itertools.
I envision a timer prog that wakes up every 45 or so seconds
parses an event list and acts on those of the current minute.
but something like recur would be needed for up/down counters.
I guess all counters can derive their data from one main counter.
the thought of starting each alarm in a thread maybe minutes 
days or months in advance is not going to survive reboots well.

on win9x HamsinClock is useable, but not flexible 
enough for interactive use from other programs.
since I have 2/3 of the pseudo code already I 
may have to at some point try to run with it. 
defining and parsing the ini format and finding 
a decent name and lack of funded free time 
keeps me hitting the snooze on this dream.


e
please forward all spam  to "me"<u%63e at f%74c.go%76>

________________________________________________________________
The best thing to hit the internet in years - Juno SpeedBand!
Surf the web up to FIVE TIMES FASTER!
Only $14.95/ month - visit www.juno.com to sign up today!



From bmgx_no_sp at mgleesonprop.co.za  Tue Jan  6 12:42:26 2004
From: bmgx_no_sp at mgleesonprop.co.za (bmgx)
Date: Tue, 06 Jan 2004 19:42:26 +0200
Subject: using cgi form via http and extracting results
In-Reply-To: <slrnbvk5vu.js6.bignose-hates-spam@iris.polar.local>
References: <3ff84844.0@news1.mweb.co.za>
	<ca4kvvskfmi3mm69t6hq8u8tkmch84jsv1@4ax.com>
	<slrnbvk5vu.js6.bignose-hates-spam@iris.polar.local>
Message-ID: <3ffaf37b.0@news1.mweb.co.za>

How would one "create" post data so that I can skip the html form and 
access the submission script (in <form method="POST" action="SCRIPT">) 
directly. This is simple if the script uses GET as mentioned, but 
unfortunately this is not the case which is the very reason for my dilemma..

Ben Finney wrote:
> On Mon, 05 Jan 2004 17:39:30 -0800, Tim Roberts wrote:
> 
>>bmgx <bmgx_no_sp at mgleesonprop.co.za> wrote:
>>
>>>1) Make an http connection to the remote script (http://server/script.cgi)
>>>2) Fill out the html form (1x TEXT and 2x SELECT input fields)
>>>3) Submit the form
>>>4) extract the actual returned result. (using regex or something..)
>>
>>You don't actually need steps 1 and 2 at all.
> 
> 
> True.
> 
> 
>>HTTP transactions are all completely separate.
> 
> 
> True (ignoring cookies for now).
> 
> 
>>The results of a form submission are just a URL.
> 
> 
> Usually false.
> 
> The result of most form submissions is an HTTP POST request, which
> contains the URL and form content as separate data.
> 
> 
>>If the form has fields "FromCurrency", "ToCurrency", and "Amount", all
>>you have to do is this:
>>
>>http://www.currencyservice.com?FromCurrency=dollars&ToCurrency=pounds&Amount=15
> 
> 
> This is only true if the form action is an HTTP GET request, which is a
> rather insecure and ugly way to submit form data, and makes it
> impossible to submit many kinds of data.  HTTP POST is the recommended
> method for submitting data to a CGI script.
> 
> 
>>You don't have to HAVE the form source in order to submit a request.
> 
> 
> True.  You just need to construct the HTTP POST request correctly.
> 



From isrgish at fusemail.com  Mon Jan  5 21:04:39 2004
From: isrgish at fusemail.com (Isr Gish)
Date: Mon, 5 Jan 2004 21:04:39 -0500
Subject: Simple way to get the full path of a running script?
Message-ID: <E1Adga5-0003Bh-VP@fuse1.fusemail.net>



-----Original Message-----
   >From: "Hartmut Goebel" Wrote:   

   >> import inspect
   >> print inspect.getsourcefile( lambda:None )
   >
   >Nice idea!
   >
   >Enhancement: when using inspect.getfile() the snippet will work even for 
   >module without sourcefile, too.
   >

These 2 ways will give .py even if .pyc was run.

There are 2 more options:
1) sys.argv[0]
2) __file__

Isr Gish






From No.Spam.mc at No.Spam.mclaveau.No.Spam.com  Sun Jan 11 05:21:21 2004
From: No.Spam.mc at No.Spam.mclaveau.No.Spam.com (Michel Claveau/Hamster)
Date: Sun, 11 Jan 2004 11:21:21 +0100
Subject: delete file with zipfile
References: <4ADOiZ$6GG@wretch.csie.nctu.edu.tw>
Message-ID: <btr7uf$lq8$1@news-reader2.wanadoo.fr>

Hi !

Please, I beseech you, I beg you, to look at this URL :
        http://mclaveau.com/ress/python/zipmci.htm

@-salutations
--
Michel Claveau
site : http://mclaveau.com






From http  Fri Jan 16 23:52:08 2004
From: http (Paul Rubin)
Date: 16 Jan 2004 20:52:08 -0800
Subject: YA string interpolation and printing idea
References: <7x3caf5mga.fsf_-_@ruckus.brouhaha.com>
	<4008B9CE.CC140EF@alcyone.com>
Message-ID: <7xwu7r6utj.fsf@ruckus.brouhaha.com>

Erik Max Francis <max at alcyone.com> writes:
> Why in the world would you want that?  Printing methods go on the things
> that do work of printing, which are file-like objects, not strings. 

To give a convenient way to do interpolated printing.  Practicality
beats purity.  Another approach I like is to define a unary minus
operation on strings, which does interpolation.  But that's gone
nowhere when I've proposed it in the past.  Maybe if type/object
unification proceeds far enough, we'll someday be able to define our
own operations on builtin objects like strings.

> And, on file-like objects, that method is called `write'.

'write' does what it should, which is writes out exactly the
characters you give it.  Python's print statement does the same plus
adds a newline, and people have gotten used to that misbehavior
(explicit is better than implicit), so I made an accomodation for that.


From aahz at pythoncraft.com  Tue Jan 27 20:15:10 2004
From: aahz at pythoncraft.com (Aahz)
Date: 27 Jan 2004 20:15:10 -0500
Subject: threads
References: <bv5qu7$hap$1@solaris.cc.vt.edu>
	<mailman.856.1075213416.12720.python-list@python.org>
	<401706AB.6020703@hotmail.com>
Message-ID: <bv72eu$gkv$1@panix3.panix.com>

In article <401706AB.6020703 at hotmail.com>,
Bart Nessux  <bart_nessux at hotmail.com> wrote:
>
>Thank you both for the info on threads in Python it was very helpful to 
>me, I've written something that I think can benefit from threading... 
>here is the code, I copied this from a few books and a few Web examples 
>and modified it to suit my test:
>
>class trivialthread(threading.Thread):
>    def url_open(self):
>       for x in xrange(999999):
>          f = urllib.urlopen("http://xxx.xxx.xxx")
>          f.read()
>          f.close()
>          print self, x

Rename ``url_open()`` to ``run()``.  You might want to read the
slideshow on my web site, paying particular attention to the examples.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

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


From paul at fxtech.com  Fri Jan 23 10:20:42 2004
From: paul at fxtech.com (Paul Miller)
Date: Fri, 23 Jan 2004 09:20:42 -0600
Subject: Looking for advice: supporting multiple embedded interpreters
In-Reply-To: <uad4fke9o.fsf@fitlinxx.com>
References: <mailman.646.1074782778.12720.python-list@python.org>
	<uad4fke9o.fsf@fitlinxx.com>
Message-ID: <6.0.1.1.2.20040123091910.062b0450@mail.fxtech.com>


>I can't address why it doesn't work in 2.3, but just a question - have
>you thought of not using independent interpreter states, but just
>tracking the contents of sys.modules and clearing out any new modules
>at reload time?  That would force even nested imports to be reloaded.
>You can find an example of doing this in the unittestgui.py module,
>for example, that is part of PyUnit, as it uses this approach to
>ensure that all modules under test are reloaded at the start of
>execution of a test suite.

At first I thought this would work, but then I remembered that I have other 
instances of interpreters and pointers to modules, objects, and functions 
pointing into them. One of my issues is I do not want to affect other 
loaded modules, and if I blow away the global module table, then I would 
mess up all the other instances of scripts that I want to leave alone.






From webmaster at beyond-thoughts.com  Fri Jan  9 14:05:32 2004
From: webmaster at beyond-thoughts.com (Christoph Becker-Freyseng)
Date: Fri, 09 Jan 2004 20:05:32 +0100
Subject: PRE-PEP: new Path class
In-Reply-To: <mailman.192.1073594032.12720.python-list@python.org>
References: <vvivefh35qjv9a@news.supernews.com>
	<mailman.192.1073594032.12720.python-list@python.org>
Message-ID: <3FFEFB7C.6030802@beyond-thoughts.com>

Gerrit Holl wrote:

> John Roth wrote:
> 
>>I'm adding a thread for comments on Gerrit Holl's pre-pep, which
[...]
> Shall I submit this as an official PEP? Or shall I first fill in more
> open issues and perhaps give the possibility to change "closed" issues?
> 

I think there are still a lot of issues. I think letting settle things 
down at first is wiser. And then present a PEP where many (even better 
all) contributors agree. (I didn't like the result of PEP308 very much ...)

In additions there are still good points in the older discussions and 
existing modules that should be integrated (You linked in the prePEP).


Moreover I'd like to extend the pre-PEP (and PEP):
"PEP xxx: new path module"
Because there is more than just the Path-Class: BaseClasses, Exceptions, 
Helper-Functions ...



Christoph Becker-Freyseng







From bart_nessux at hotmail.com  Thu Jan  8 22:21:13 2004
From: bart_nessux at hotmail.com (Bart Nessux)
Date: Thu, 08 Jan 2004 22:21:13 -0500
Subject: convert a list to a string
Message-ID: <3FFE1E29.20801@hotmail.com>

number = random.sample(range(count), 1)

This makes 'number' into a one entry list (I don't know why as 'count' 
is an integer). Is there an easy way to convert 'number' back to an int?

TIA



From aahz at pythoncraft.com  Fri Jan  2 14:11:52 2004
From: aahz at pythoncraft.com (Aahz)
Date: 2 Jan 2004 14:11:52 -0500
Subject: Conditional except: blocks
References: <mailman.27.1073065446.12720.python-list@python.org>
Message-ID: <bt4fpo$lcc$1@panix3.panix.com>

In article <mailman.27.1073065446.12720.python-list at python.org>,
Robert Brewer <fumanchu at amor.org> wrote:
>
>I don't have a quesiton or problem, I just figured some of you would
>enjoy the somewhat bizarre logic of the snippet I just wrote for a CGI
>request dispatcher:
>
>try:
>    return nextHandler(args)
>except (None, Exception)[self.trapErrors], exc:
>    if page =3D=3D u'-Error':
>        raise exc
>    else:
>        return self.handle_error(exc, scriptWithPath)
>
>If self.trapErrors is True, all exceptions (which subclass Exception)
>get trapped, otherwise, no exceptions are trapped. Spiffy. :)

That's pretty sick.  If you really need to do that, here's a more
Pythonic approach:

    # This goes at beginning of program
    # or maybe at class/instance initialization
    if trapErrors:
        exceptTuple = (Exception,)
    else:
        exceptTuple = (None,)

    # some time later
    try:
        return nextHandler(args)
    except exceptTuple, exc:
        # Handle exception
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

Weinberg's Second Law: If builders built buildings the way programmers wrote 
programs, then the first woodpecker that came along would destroy civilization.


From claird at lairds.com  Wed Jan 28 08:10:39 2004
From: claird at lairds.com (Cameron Laird)
Date: Wed, 28 Jan 2004 13:10:39 -0000
Subject: Running python automatically in the background
References: <1e4e0378.0401271729.3ea6b5c2@posting.google.com>
	<slrnc1e4c4.14j.bignose-hates-spam@rose.localdomain.fake>
Message-ID: <101fd6fcehs156a@corp.supernews.com>

In article <slrnc1e4c4.14j.bignose-hates-spam at rose.localdomain.fake>,
Ben Finney  <bignose-hates-spam at and-benfinney-does-too.id.au> wrote:
>On 27 Jan 2004 17:29:53 -0800, Alfred wrote:
>> i'm trying to figure out if there is some easy way to run a python
>> script in the background _without_ specifying "&" in a linux
>> enivornment.
>>
>> script.py &
>
>That's how you tell any POSIX-compatible shell (like bash) to execute a
>command as a background job.  Why is that not acceptable?
>
>> been looking around but couldn't find any docs to support a
>> possibility.
>
>Perhaps if you explain what it is you're trying to achieve, we can offer
>a better solution.
			.
			.
			.
I'll speculate Alfred has an interest in what & does.  It
does this, roughly:  it forks a copy of the current process,
disconnects stdin, and transfers control to the child.  So,
yes, it's possible to write a Python program that begins in
the foreground and, after a while, programmatically "back-
grounds" itself.  Is that the goal?
-- 

Cameron Laird <claird at phaseit.net>
Business:  http://www.Phaseit.net


From johng2001 at rediffmail.com  Thu Jan 15 06:52:08 2004
From: johng2001 at rediffmail.com (John)
Date: 15 Jan 2004 03:52:08 -0800
Subject: Best Python IDE Code Completion!
Message-ID: <ba129ce7.0401150352.43e20efa@posting.google.com>

Hi,
  Could you give your opinions on the best code completion in Python
IDEs. My only complaint with PythonWin has been that the code
completion support is incomplete. The interactive mode has better
behavior than the editor. Tried to fix it but could not. Boa is not
too different. At least when I last checked (a few months ago) Komodo
and Visual Python were not very different either.

  Wing IDE seems converse. The editor auto list members is great but
has no calltips. The interactive window has no completion at all.

  I have not checked PythonWorks and Black Adder in a while but their
web sites do not seem to brag much in this direction.

  Python has great introspective capabilities and we have a great open
contributing community. What technical difficulties keep us from
having REAL code completion like MS, Borland and several Java IDEs
(All of which have been funded at one time or the other if not
entirely - perhaps this is the reason?)

  For me, code completion is a very important part of the coding
experience and I really miss it in Python in it's full effect.


From michele.simionato at poste.it  Tue Jan 13 07:24:40 2004
From: michele.simionato at poste.it (Michele Simionato)
Date: 13 Jan 2004 04:24:40 -0800
Subject: Python is far from a top performer according to benchmark
	test...
References: <ryELb.238$tK2.228@amstwist00>
	<6ee58e07.0401092129.302cb9d4@posting.google.com>
	<pan.2004.01.11.06.08.18.867825@yahoo.com>
	<bttu62$gdh$1@newstree.wise.edt.ericsson.se>
	<btvsvl$pu7$1@panix3.panix.com>
Message-ID: <95aa1afa.0401130424.49749912@posting.google.com>

aahz at pythoncraft.com (Aahz) wrote in message news:<btvsvl$pu7$1 at panix3.panix.com>...
> In article <bttu62$gdh$1 at newstree.wise.edt.ericsson.se>,
> Frithiof Andreas Jensen <frithiof.jensen at removethis.ted.ericsson.dk> wrote:
> >
> >That, in my opinion, is wrong: Fortran is successful because it was there
> >first!
> 
> Which brings up the obvious question: why isn't Lisp successful?

But it is successful! Look at people working on AI, theory of programming
languages, etc: they will (presumably) know Lisp. OTOH, look at people
working on number crunching: they will (presumably) know Fortran.
It turns out that the number of people working on numerical analysis (or 
using numerical tools) is much larger than the number of people working on 
abstract things, so you will have more people knowing Fortran than people 
knowing Lisp. But this fact alone does not mean that one language is more
successfull than the other in its application niche. You could compare
Python and Perl (or Ruby) and say that one is more successful than
the other, but Lisp and Fortran have different audiences and you cannot 
estimate their success just as number of users.

Just my 2 eurocents,

        Michele


From http  Fri Jan  9 17:39:27 2004
From: http (Paul Rubin)
Date: 09 Jan 2004 14:39:27 -0800
Subject: Straw poll on Python performance (was Re: Python is far from a
	top performer ...)
References: <ryELb.238$tK2.228@amstwist00>
	<3fff234a$0$129$e4fe514c@dreader3.news.xs4all.nl>
	<3FFF26A1.943DEA84@engcorp.com>
Message-ID: <7xsmio4uhs.fsf@ruckus.brouhaha.com>

Peter Hansen <peter at engcorp.com> writes:
> This is my "straw poll" question:
> 
>   Do you spend a "significant" amount of time actually optimizing your 
>   Python applications?  (Significant is here defined as "more than five
>   percent of your time", which is for example two hours a week in a 
>   40-hour work week.)

Yes, absolutely.

> Algorithmic improvements that you would make regardless of implementation
> language do not qualify, and wasting time optimizing a script that you
> run once a year so it takes ten seconds instead of fifteen also does not
> qualify because you certainly didn't need to do it...

Sometimes I'll take the time to implement a fancy algorithm in Python
where in a faster language I could use brute force and still be fast
enough.  I'd count that as an optimization.


From csgcsg39 at hotmail.com  Wed Jan 28 04:58:07 2004
From: csgcsg39 at hotmail.com (C GIllespie)
Date: Wed, 28 Jan 2004 09:58:07 -0000
Subject: Problem connecting to https using ZSI (openssl problem) -
	python2.3
References: <Pine.GSO.4.58.0401271908190.25634@flora01.slac.stanford.edu>
Message-ID: <bv813h$uo3$1@ucsnew1.ncl.ac.uk>

Hi,

Your best bet would be to ask this question in the python webservices
mailing list (see link below)

Colin

http://sourceforge.net/mailarchive/forum.php?forum_id=1729



"Adil Hasan" <hasan at slac.stanford.edu> wrote in message
news:Pine.GSO.4.58.0401271908190.25634 at flora01.slac.stanford.edu...
>
>  Hello,
>        I'm having problems trying to use ZSI to connect to a https url.
>  I give the command and I get prompted for my X509 cert pass-phrase, but
>  the program dies with an openssl error.
>
>  Here's my code:
>
>  from ZSI import *
>  u=''
>  n='https://shahzad.fnal.gov/edg-voms-admin/uscms/services/VOMSAdmin'
>  b = Binding(url=u,ns=n, ssl=1, \
>              host='shahzad.fnal.gov',port=8080, \
>              cert_file='/home/hasan/.globus/usercert.pem', \
>              key_file='/home/hasan/.globus/userkey.pem')
>  b.listCAs()
>
> The traceback I get is:
> Enter PEM pass phrase:
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
>   File "/usr/local/python2.3/lib/python2.3/site-packages/ZSI/client.py",
> line 28, in __call__
>     requesttypecode=TC.Any(self.name, aslist=1))
>   File "/usr/local/python2.3/lib/python2.3/site-packages/ZSI/client.py",
> line 131, in RPC
>     self.Send(url, opname, obj, **kw)
>   File "/usr/local/python2.3/lib/python2.3/site-packages/ZSI/client.py",
> line 184, in Send
>     self.h.connect()
>   File "/usr/local/python2.3/lib/python2.3/httplib.py", line 961, in
> connect
>     ssl = socket.ssl(sock, self.key_file, self.cert_file)
>   File "/usr/local/python2.3/lib/python2.3/socket.py", line 73, in ssl
>     return _realssl(sock, keyfile, certfile)
> socket.sslerror: (1, 'error:140770FC:SSL
> routines:SSL23_GET_SERVER_HELLO:unknown protocol')
>
> Any ideas about this? Does anyone know how to solve this problem? I have
> seen one post here with a similar problem, but haven't seen any
> resolution.
>
> Help!
>
> thanks, adil




From dwelch91.nospam at comcast.net  Sun Jan 18 12:19:21 2004
From: dwelch91.nospam at comcast.net (djw)
Date: Sun, 18 Jan 2004 17:19:21 GMT
Subject: Using python for _large_ projects like IDE
In-Reply-To: <930ba99a.0401180625.5863acd4@posting.google.com>
References: <930ba99a.0401180625.5863acd4@posting.google.com>
Message-ID: <tezOb.93647$8H.136623@attbi_s03>

I would take a look at Eric. Its written in Python, is fully featured 
and is plenty fast. In fact, there are plenty of IDEs written in Python 
or fo Python, why would you want to create yet another one? Also, as a 
beginning Python programmer, I fear you may be getting in over your head 
(I'm a 2+ year Python and 10+ year C/C++ developer and would be hesitant 
  to tackle an IDE).

Anyway, Eric is here:

http://www.die-offenbachs.de/detlev/eric3.html

-Don



Sridhar R wrote:

> Hi,
> 
> I am a little experienced python programmer (2 months).  I am somewhat
> experienced in C/C++.  I am planning (now in design stage) to write an
> IDE in python.  The IDE will not be a simple one.  I had an idea of
> writing the IDE in C/C++, as it is a big project, bcoz of the
> following
> 
> 1. if python is used, then the memory required for running the IDE
> will be high.
> 2. if pure python is used, the IDE will be slower.
> 
> I'm not sure whether they are true.
> 
> Then I thought of using python for 90% of the code and using C for
> other performance critical part.  But the problem is in identifying
> the performance critical code.  People suggest to start with pure
> python and then _recode_ the performance critical code after profiling
> the original code.  But I fear whether there will be a conflit in say
> data structures.  Not yet expert in extending/embedding python.
> Are there any ways to forsee the performance critical parts?
> 
> Also, any suggestions on reducing memory usage of big applications
> written in python?



From gerrit at nl.linux.org  Thu Jan 29 11:05:12 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Thu, 29 Jan 2004 17:05:12 +0100
Subject: C API: how to tell if x is a new style instance?
In-Reply-To: <401821E2.1070106@rogers.com>
References: <20040128184040.GD11485@foof.i3.cz> <401821E2.1070106@rogers.com>
Message-ID: <20040129160512.GA31855@nl.linux.org>

Mike C. Fletcher wrote:
> Well, I don't actually know how to check for the spiritual state of a 
> new-style class, but here's how to tell if an instance is an instance of 
> a new-style class:
> 
>    * Note that a new-style class is a sub-class of type, while
>      old-style classes are not

I think you mean instance here?
>>> issubclass(int, type)
False
>>> isinstance(int, type)
True

yours,
Gerrit.

-- 
2. If any one bring an accusation against a man, and the accused go to
the river and leap into the river, if he sink in the river his accuser
shall take possession of his house. But if the river prove that the
accused is not guilty, and he escape unhurt, then he who had brought the
accusation shall be put to death, while he who leaped into the river shall
take possession of the house that had belonged to his accuser.
          -- 1780 BC, Hammurabi, Code of Law
-- 
PrePEP: Builtin path type
    http://people.nl.linux.org/~gerrit/creaties/path/pep-xxxx.html
Asperger's Syndrome - a personal approach:
	http://people.nl.linux.org/~gerrit/english/



From timr at probo.com  Wed Jan 14 02:33:41 2004
From: timr at probo.com (Tim Roberts)
Date: Tue, 13 Jan 2004 23:33:41 -0800
Subject: dde
References: <8EFMb.102403$_P.3808599@news4.tin.it>
Message-ID: <f3s900dhej5v8pd7dnurrpo0gl7i7v4d2k@4ax.com>

"Alessandro Crugnola *sephiroth*" <alessandro at sephiroth.it> wrote:
>
>Hi all
>I would like to send dde messages to an application, but i don't know which messages it supports.
>Is possible to do in some way or I absolutely need the api specifications?

You need specs and/or examples.  One of the biggest shortcomings of DDE is
that it is there is no way to ask an application what operations it
supports.  Worse, there is no particular standard for the format of DDE
messages, so even if you know the function you want to perform, you can't
guess what the message and its parameters should be.

What DDE app are you trying to control?
-- 
- Tim Roberts, timr at probo.com
  Providenza & Boekelheide, Inc.


From bkelley at wi.mit.edu  Fri Jan  9 23:19:38 2004
From: bkelley at wi.mit.edu (Brian Kelley)
Date: Sat, 10 Jan 2004 04:19:38 GMT
Subject: Straw poll on Python performance (was Re: Python is far from
 a top  performer ...)
In-Reply-To: <3FFF26A1.943DEA84@engcorp.com>
References: <ryELb.238$tK2.228@amstwist00>
	<3fff234a$0$129$e4fe514c@dreader3.news.xs4all.nl>
	<3FFF26A1.943DEA84@engcorp.com>
Message-ID: <u3LLb.10636$5V2.18224@attbi_s53>

> This is my "straw poll" question:
> 
>   Do you spend a "significant" amount of time actually optimizing your 
>   Python applications?  (Significant is here defined as "more than five
>   percent of your time", which is for example two hours a week in a 
>   40-hour work week.)

Yes and No :)  I find that optimizing algorithms is a lot more 
beneficial than optimizing code.  Let me give a small example.  I have 
written a chemoinformatics engine (http://frowns.sourceforge.net/) and 
one of it's features is substructure searching.  That is finding if a 
graph is embedded in another graph.  This is an NP-Complete problem.  A 
company recently compared their technique in terms of speed and 
correctness to frowns.  According to them, frowns was 99% percent 
correct but 1000x slower.  (Why they were marketing their system which 
was built over 5+ man years against mine which was built over 3 months I 
never will understand)

Now, 1000x is a *lot* slower.  However, when used in practice in a 
database setting, my system has a quick mechanism that can reject false 
matches very quickly.  This is standard practice for chemistry databases 
by the way.  All of a sudden the 1000x difference becomes almost 
meaningless.  For a given search across 300000+ compounds, my system 
takes 1.2 seconds and their's takes 25 minutes.  Using my prefiltering 
scheme their system takes 0.7 seconds.  Now my code didn't change at 
all, only the way it was used changed.

I could, of course, generate an example that takes me much longer but 
the average case is a whole lot better.  My system is free though, so my 
users tend not to mind (or quite honestly, expect) as much :)

Brian




From usenet_spam at janc.invalid  Thu Jan 15 23:49:45 2004
From: usenet_spam at janc.invalid (JanC)
Date: Fri, 16 Jan 2004 04:49:45 GMT
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
	<pan.2004.01.14.01.17.00.970198@fakeemail.com>
	<bu2ana$bmpci$1@ID-207230.news.uni-berlin.de>
	<Xns94711BBF5F7D6JanC@213.119.4.35>
	<bu4uf4$3ri9$1@netnews.upenn.edu>
	<nMnNb.12331$9k7.233353@news.xtra.co.nz>
Message-ID: <Xns94723B4CAA8FBJanC@213.119.4.35>

Peter Ashford <me at here.there.com> schreef:

>> vi might come close... ;-)
> 
> Never!!!
> 
> Emacs, on the other hand.... <duck> :)

vi can't lose that competition.

You can always implement vi in emacs if you want an editor, but you can't 
implement emacs in vi if you need an OS.  ;)

BTW: I don't care about vi vs. emacs, I use SciTE.  :-)

-- 
JanC

"Be strict when sending and tolerant when receiving."
RFC 1958 - Architectural Principles of the Internet - section 3.9


From jensthiede at webgear.co.za  Fri Jan  9 15:47:13 2004
From: jensthiede at webgear.co.za (Jens Thiede)
Date: 9 Jan 2004 12:47:13 -0800
Subject: Variable Scope 2 -- Thanks for 1.
Message-ID: <dcde6f.0401091247.c17b76e@posting.google.com>

I found the querk in my code:

a = [1, 2, 3];
b = a;
b.append(4);

b == [1, 2, 3, 4]; # As it should.
a == [1, 2, 3, 4]; # - Why?

One would think that b is a referance to a - however I know it's not.
Without changing a thing from above, the following is true:

b = [];
b.append(5);
a == [1, 2, 3, 4];
b == [5];

How do I avoid accedentaly modifying variables, is this a bug? If not
why not?

Jens Thiede.

By the way, living in South Africa, where we have 11 national
languages is nice although - as a result - the World does not know
what to think of us. :)


From ich at jan-kesten.de  Sun Jan 18 07:36:31 2004
From: ich at jan-kesten.de (Jan Kesten)
Date: Sun, 18 Jan 2004 13:36:31 +0100
Subject: Some kind of mail->html converter for python?
Message-ID: <budunb$gn7ji$1@ID-195770.news.uni-berlin.de>

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


Hello out there :-)

Is was looking around for a tool like mhonarc[1], but implemented
in python (musn't be such powerful). Somebody know such a tool?
My problem is to archive an entire mailing list on a webpage, but
I don't have a shell account there, so I can't install a perl
program like mhonarc quite easy. So I thought about putting a cgi
~ there, that can do the job when called.

1. Getting new mail from a pop3 account - no problem at all,
poplib works really fine here.

2. Updating the archive - here I found nothing. So I like to ask
first before I start programming at my own :-)

Any hints?

Cheers,
Jan
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Version: GnuPG v1.2.2 (MingW32)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iD8DBQFACn3PvvmCkIIgH8QRAkxvAKCmb9UCydkGGIx+u3KgMk5wX3iLRACeKbOq
g4gZiDaTQ6AQKO1IHGGOWyc=
=aMvH
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From perry at stsci.edu  Mon Jan 19 17:13:40 2004
From: perry at stsci.edu (Perry Greenfield)
Date: Mon, 19 Jan 2004 17:13:40 -0500
Subject: [Numpy-discussion] Status of Numeric
In-Reply-To: <400C3EF3.8090005@ee.byu.edu>
Message-ID: <CEELJPECNGEGKFNDLHFFGEBKCCAA.perry@stsci.edu>

Travis Oliphant writes:
> 
> Numarray is making great progress and is quite usable for many 
> purposes.  An idea that was championed by some is that the Numeric code 
> base would stay static and be replaced entirely by Numarray.
> 
> However, Numeric is currently used in a large installed base.  In 
> particular SciPy uses Numeric as its core array.  While no doubt 
> numarray arrays will be supported in the future, the speed of the less 
> bulky Numeric arrays and the typical case that we encounter in SciPy of 
> many, small arrays will make it difficult for people to abandon Numeric 
> entirely with it's comparatively light-weight arrays.
> 
I'd like to ask if the numarray option couldn't at least be
considered. In particular with regard to speed, we'd like to know
what the necessary threshold is. For many ufuncs, numarray is
within a factor of 3 or so of Numeric for small arrays. Is this
good enough or not? What would be good enough? It would probably 
be difficult to make it as fast in all cases, but how close does it
have to be? A factor of 2? 1.5? We haven't gotten very much feedback
on specific numbers in this regard.

Are there other aspects of numarray performance that are a problem?
What specifically? We don't have the resources to optimize everything
in case it might affect someone. We need to know that it is particular
problem with users to give it some priority (and know what the
necessary threshold is for acceptable performance). Perhaps the two
(Numeric and numarray) may need to coexist for a while, but we would
like to isolate the issues that make that necessary. That hasn't 
really happened yet.

Travis, do you have any specific nummarray speed issues that have
arisen from your benchmarking or use that we can look at?

Perry Greenfield 



From webmaster at beyond-thoughts.com  Thu Jan  8 19:43:15 2004
From: webmaster at beyond-thoughts.com (Christoph Becker-Freyseng)
Date: Fri, 09 Jan 2004 01:43:15 +0100
Subject: PRE-PEP: new Path class; (UPDATE)  isValid, exists
In-Reply-To: <mailman.197.1073601954.12720.python-list@python.org>
References: <vvivefh35qjv9a@news.supernews.com>	<3FFA7E82.4020609@beyond-thoughts.com>	<mailman.159.1073418070.12720.python-list@python.org>	<3FFC9209.7060703@beyond-thoughts.com>	<mailman.185.1073563995.12720.python-list@python.org>
	<mailman.197.1073601954.12720.python-list@python.org>
Message-ID: <3FFDF923.8020605@beyond-thoughts.com>

I think the implementation should be changed for the "NormalFSPath".

def exists(self):
	try:
		os.stat(str(self))
		return True
	except OSError, exc:	# Couldn't stat so what's up
		if exc.errno == errno.ENOENT:	# it simply doesn't exist
			return False
	return None	# the path is invalid



def isValid(self, raiseExc=False):
	if self.exists() is None:
		if raiseExc:
			raise InvalidPath
		else:
			return False
	else:
		return True




Christoph Becker-Freyseng





From aahz at pythoncraft.com  Thu Jan 22 09:26:28 2004
From: aahz at pythoncraft.com (Aahz)
Date: 22 Jan 2004 09:26:28 -0500
Subject: "Lecture Preparation" Discussions on Python
References: <1010a26.0401212246.3cac7d06@posting.google.com>
Message-ID: <buomik$k34$1@panix1.panix.com>

In article <1010a26.0401212246.3cac7d06 at posting.google.com>,
Amir Michail <amichail at cse.unsw.edu.au> wrote:
>
>We are planning to have "lecture preparation" discussions in comp3141
>at UNSW, where anyone can participate -- not only students taking the
>subject.
>
>There is a heavy python component in this class and I was wondering
>whether anyone is interested in participating in these discussions. 
>We are looking for both python beginners and experts.

While I'm generally interested in such discussions, I won't be
participating because I hate web boards.  I vastly prefer netnews, with
grudging use of e-mail lists.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

A: No.
Q: Is top-posting okay?


From No.Spam.mc at No.Spam.mclaveau.No.Spam.com  Sat Jan 31 00:26:48 2004
From: No.Spam.mc at No.Spam.mclaveau.No.Spam.com (Michel Claveau/Hamster)
Date: Sat, 31 Jan 2004 06:26:48 +0100
Subject: python in dreamweaver
References: <d99e1341.0401271818.625d5ef2@posting.google.com>
	<bv86nc$rto$2@news-reader4.wanadoo.fr>
	<d99e1341.0401291857.6deabb3d@posting.google.com>
	<bvem9h$j3a$1@news-reader5.wanadoo.fr>
	<bven43$gcc$1@news.service.uci.edu>
Message-ID: <bvfe6u$nqn$1@news-reader1.wanadoo.fr>

Hi !


>>> It would be significantly more Pythonic to have a template similar to
the following...

Yes, but there are the visual aspect of DM...


MCI





From dw-google.com at botanicus.net  Fri Jan  2 01:46:12 2004
From: dw-google.com at botanicus.net (David M. Wilson)
Date: 1 Jan 2004 22:46:12 -0800
Subject: finding file size
References: <4V4Jb.12709$Vl6.2811218@news20.bellglobal.com>
Message-ID: <99dce321.0401012246.712dd2fb@posting.google.com>

"Sean Ross" <sross at connectmail.carleton.ca> wrote...

> My question is this: Is there a reason why file objects could not have a
> size method or property? So that you could then just ask the file how big it
> is using fd.size or fd.size(). I'm just curious, because, well, it seems to
> have obvious utility, and the way to find it is less than obvious (at least,
> it was to me).

Hey!

1) Using 'fd' as a name for a file object is a bad idea - you can get
fds from os.open. If you insist on C-ish names, how about 'fp'
instead? :)

2) There's nothing to stop the file object from having a size method,
except that file-like objects then have more to implement.

How about something like:

py> class SizedFile(file):
...     def __len__(self):
...             oldpos = self.tell()
...             self.seek(0, 2)
...             length = self.tell()
...             self.seek(oldpos)
...             return length
... 
py> bleh = SizedFile("/etc/passwd")
py> len(bleh)
1520
py> len([ x for x in bleh ])
33



As I wrote this I realised it's wrong - size() would be better, since
the length of the sequence is not the number of bytes. Maybe it is in
binary mode? Dunno, me sleepy, goodnight..


David.


> 
> Thanks,
> Sean


From martin at v.loewis.de  Sat Jan  3 16:09:01 2004
From: martin at v.loewis.de (Martin v. =?iso-8859-15?q?L=F6wis?=)
Date: 03 Jan 2004 22:09:01 +0100
Subject: OT: Why -g when compiling
References: <4f0a9fdb.0312230733.736d124d@posting.google.com>
	<m3wu8ntof0.fsf@pc150.maths.bris.ac.uk>
	<4f0a9fdb.0312231526.394a518e@posting.google.com>
	<m3pteetrak.fsf@pc150.maths.bris.ac.uk>
	<bsffdq$7oe$00$1@news.t-online.com>
	<m33cb7uaqq.fsf@pc150.maths.bris.ac.uk>
Message-ID: <m365fsageq.fsf@mira.informatik.hu-berlin.de>

Michael Hudson <mwh at python.net> writes:

> That makes sense.  I also guess that as shared libraries are mmaped
> into the applications address space they won't use physical memory
> until referenced anyway.  But relocations probably mess with that.

That's what PIC (position-independent code) is for: The code itself
has no relocations, only centralized tables at the beginning of the
shared library (PLT: procedure linkage table, GOT: global offset
table) have relocations; they are tiny compared to the entire image.

On Windows, each DLL has a "preferred load address"; if the library is
loaded to this address, no relocations are needed (except in the
import stubs).

On OSX, the infamous "optimizing system" process invoked during
software installation precomputes the addresses of all symbols, and
puts updated code segments on disk which then can be mapped without
relocation.

Regards,
Martin


From __peter__ at web.de  Fri Jan  2 04:48:52 2004
From: __peter__ at web.de (Peter Otten)
Date: Fri, 02 Jan 2004 10:48:52 +0100
Subject: Multiple exception syntax
References: <bt3bqr$j84$1@news-reader5.wanadoo.fr>
Message-ID: <bt3eus$gre$04$1@news.t-online.com>

Pierre Quentel wrote:

> I find this confusing. It would be clearer for me to have :
> 
> "except Error1 or Error2 or Error3"

I see the ambiguity, but I find the above confusing, too, because it looks
like a boolean expression, which it is not. I'd rather change the syntax to
clearly separate the tuple of exception classes from the target:

"except" [expression ["to" target]] ":" suite

"to" is currently a comma. Don't expect that to happen, though.

By the way, I don't recall having seen expression containing exception
*instances*, and only learned that this is possible when I looked up the
try statement in the reference. Is this for string exceptions or has it an
application in newer code?

> Or have I drunk too much lately ?

Obviously, if you have to ask :-)

Peter





From msurette at laframboise.net  Wed Jan 28 10:14:26 2004
From: msurette at laframboise.net (Michael Surette)
Date: Wed, 28 Jan 2004 15:14:26 GMT
Subject: Running python automatically in the background
References: <1e4e0378.0401271729.3ea6b5c2@posting.google.com>
Message-ID: <pan.2004.01.28.15.14.26.461032@laframboise.net>

On Tue, 27 Jan 2004 17:29:53 -0800, Alfred wrote:

> hi all,
> 
> i'm trying to figure out if there is some easy way to run a python
> script in the background _without_ specifying "&" in a linux
> enivornment.
> 
> script.py &
> 
> vs
> 
> script.py
> 
> is there an easy way to do this?
> 
> been looking around but couldn't find any docs to support a
> possibility.
> 
> thanks!
> 
> - al
I forget where I first found this snippet, but it's probably what you want.

  PID= os.fork()
  if PID != 0:  sys.exit()



From daniels at dsl-only.net  Thu Jan  1 17:31:01 2004
From: daniels at dsl-only.net (sdd)
Date: Thu, 01 Jan 2004 14:31:01 -0800
Subject: 'inverting' a dict
In-Reply-To: <3ff3848f_1@dns.sd54.bc.ca>
References: <3ff1b688$0$319$e4fe514c@news.xs4all.nl>
	<cSJIb.884038$pl3.825436@pd7tw3no> <3ff3848f_1@dns.sd54.bc.ca>
Message-ID: <3ff4ab5b$1@nntp0.pdx.net>

Bob van der Poel wrote:
> This is sort of off topic for the thread, but I've got a similar 
> problem. In this case I have a dict like:
> 
>     { 'key1': 'value1', 'key2': value2}
> 
> and I sometimes need to find the key for the value. All values/keys are 
> unique. I just use a loop:
> 
>     for a in dict:
>         if dict[a]== targ:
>             return a
>     return None
For a few hunts, I'd do:
      for key,value in dictionary.iteritems():
          if value == target:
              return key
      return None

Of course, if it probed a lot between changes, it's better to

reversedictionary = dict([(v,k) for k,v in dictionary.items()])

-Scott David Daniels
Scott.Daniels at Acm.Org


From jepler at unpythonic.net  Sun Jan 18 22:18:16 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Sun, 18 Jan 2004 21:18:16 -0600
Subject: How to hide user's input
In-Reply-To: <buffui$705$1@solaris.cc.vt.edu>
References: <buffui$705$1@solaris.cc.vt.edu>
Message-ID: <20040119031816.GA21465@unpythonic.net>

see the getpass module for one way to do this...

Jeff



From aaron at reportlab.com  Tue Jan  6 09:31:54 2004
From: aaron at reportlab.com (Aaron Watters)
Date: 6 Jan 2004 06:31:54 -0800
Subject: ANNOUNCE: xsdb -- the eXtremely Simple Database goes alpha
References: <mailman.25.1071054806.9307.python-list@python.org>
	<c0f3952d.0312290737.685678d6@posting.google.com>
	<9a6d7d9d.0401051026.775d9ef3@posting.google.com>
Message-ID: <9a6d7d9d.0401060631.45d2454c@posting.google.com>

aaron at reportlab.com (Aaron Watters) wrote in message news:<9a6d7d9d.0401051026.775d9ef3 at posting.google.com>...
> Basically I hadn't considered
> the possibility that a program might open two direct connections 
> to a database within the same minute...

whoops I meant "second" not "minute".  This may not happen very
often because only one direct connection is permissable at any
given moment (but many indirect connections are okay).
   -- Aaron Watters

===
TO INFINITY AND BEYOND


From jjl at pobox.com  Tue Jan 13 12:44:36 2004
From: jjl at pobox.com (John J. Lee)
Date: 13 Jan 2004 17:44:36 +0000
Subject: C++ bad-mouthing (was: Why learn Python ??)
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<7xisjh1e3i.fsf@ruckus.brouhaha.com>
	<10064loqc7sd7e3@corp.supernews.com>
	<7xeku496wx.fsf@ruckus.brouhaha.com>
	<donn-9D2291.16343412012004@nntp6.u.washington.edu>
	<7xhdz08xgy.fsf@ruckus.brouhaha.com> <1073978329.887910@yasure>
Message-ID: <87brp7agl7.fsf@pobox.com>

"Donn Cave" <donn at drizzle.com> writes:

> Quoth Paul Rubin <http://phr.cx at NOSPAM.invalid>:
> ...
> | The one attempt I know of to write a substantial Python application
> | competitive with similar applications written in C was the Grail web
> | browser, and AFAIK that was a complete failure.  However, for small to
> | medium sized projects which don't have to run fast, Python is great.
[...]
> But at any rate, I thought we were talking about huge projects
> involving many programmers, and I don't think Grail was of that
> sort at all.

Right.  Wasn't it a research project?  In any case, hardly a
large-scale programming effort along the lines of Mozilla!


> I don't know what kind of programmer resources were
> allocated to it,

No obvious attribution other than "CNRI" in the tarball, but I think
mostly Guido.  :-)


> but I bet it was actually a smashing success in
> those terms.  As for its size, I'd have to look, I have the code
> around somewhere, but I'd guess it was smaller than Mailman or Zope.
> Small enough that one programmer could become pretty thoroughly
> acquainted with the whole thing.

john[0]$ find /usr/local/src/python/grail-0.6 -name '*.py' | xargs /home/john/bin/pycount.py
   lines    code     doc comment   blank  file
[...]
   34808   25255    2801    2356    4396  total

pycount reports 108756 code lines for Zope 2.6.3 (watch out: for some
reason pycount spits out more than one total line with Zope, which you
then have to add up -- maybe I'm doing something wrong there...).
Given typical reported ratios of Python to C++ lines of code, that's a
lot of code (not to mention all the Zope Python code outside of that
package -- plone, for example; there's a fair amount of C code there,
too, of course).  Alex Martelli claimed a C++/Python lines of code per
function point ratio of 5 or 6 in a post in this group -- if you
believe that's a fair rule of thumb, then on that basis you'd expect
550-650 kLoC for a mythical Zope-in-C++ .  In reality, since Zope
takes advantage of Python's features, you'd expect to have to write
many more lines of C++ than that, following Greenspun's tenth law.

Who can be sure what the biggest Python code is, though?  See Paul
Graham's article on his web store-builder (implemented in Lisp) for
one motivation for keeping it a secret (a motivation of the order of
several tens of millions of dollars, IIRC ;-).

http://www.paulgraham.com/avg.html


(pycount reports 21730 code lines for mailman 2.1.4, BTW)


John


From rune.froysa at usit.uio.no  Wed Jan 14 02:35:17 2004
From: rune.froysa at usit.uio.no (Rune Froysa)
Date: 14 Jan 2004 08:35:17 +0100
Subject: Unicode and exception strings
References: <svl1xq98gdc.fsf@dresden.uio.no>
	<cf0uvv4m34rgcgoi2nfj3hcgugbah82k96@4ax.com>
	<svl4qv17gw8.fsf@dresden.uio.no>
	<oj6900hku41dphjdep4t54cc9l0jggq195@4ax.com>
Message-ID: <svl7jzv7zka.fsf@dresden.uio.no>

Terry Carroll <carroll at tjc.com> writes:

> On 12 Jan 2004 08:41:43 +0100, Rune Froysa <rune.froysa at usit.uio.no>
> wrote:
> 
> >Terry Carroll <carroll at tjc.com> writes:
> >
> >> On 09 Jan 2004 13:18:39 +0100, Rune Froysa <rune.froysa at usit.uio.no>
> >> wrote:
> >> 
> >> >Assuming an exception like:
> >> >
> >> >  x = ValueError(u'\xf8')
> >> >
> >> >AFAIK the common way to get a string representation of the exception
> >> >as a message is to simply cast it to a string: str(x).  This will
> >> >result in an "UnicodeError: ASCII encoding error: ordinal not in
> >> >range(128)".
...
> >>> x = ValueError(u'\xf8')
> >>> x.args[0]
> u'\xf8'

I was aware of the args variable in Exception, though I could not find
any documentation for its usage, thus I wanted to rely on its internal
__str__ method, rather than constructing the message myself.  But,
after a quick look at Python/exceptions.c, it seems that this is a
feasable way :-)

> The only thing is, what to do with it once you get there.  I don't think
> 0xF8 is a valid unicode encoding on its own.  IIRC, it's part of a
> multibyte character.

Python gives me this, so I think it is correct:
  >>> unicode('?', 'latin-1')                  
  u'\xf8'

For my usage, "u'\xf8'.encode('latin-1', 'replace')" is sufficient.

> Is this helping any, or am I just flailing around?

It does, thanks a lot for your help.

Regards,
Rune Fr?ysa


From syver-en+usenet at online.no  Thu Jan  8 10:34:39 2004
From: syver-en+usenet at online.no (Syver Enstad)
Date: 08 Jan 2004 16:34:39 +0100
Subject: Why " ".some_string is often used ?
References: <Xns94698A5566736stefninnospamyahoofr@213.228.0.4>
	<vvqghojub1dl07@news.supernews.com> <3FFD70EA.A6AF3CB8@engcorp.com>
Message-ID: <u8ykio3n4.fsf@online.no>

Peter Hansen <peter at engcorp.com> writes:

> John Roth wrote:
> > 
> > And I agree, it's not entirely obvious why it's a string
> > method rather than a list method, since it operates on
> > a list, not on a string. The only explanation that makes
> > sense is that, as a list method, it would fail if the list
> > contained something other than a string. That's still
> > not very friendly, though.
> 
> One could about as easily argue (and I believe several have done
> this quite well in the past, better than I anyway) that you are
> actually operating on the *string*, not the list.  You are in
> effect asking the string to act as a joiner for the elements in the
> list, not asking the list to join itself using the specified
> string.
> 
> At least, if you look at it that way, it might be easier to swallow.

Can't we have both. This is called a reversing method (Beck, Smalltalk
Best Practice Patterns) because it allows you to send several messages
to the same object instead of switching between different instances,
allowing the code to be more regular.

class MyList(list):
    def join(self, aString):
        return aString.join(self)


Like this:

lst = ['one', 'two', 'three']
print lst
print lst.join('\n')

I'd also like a reversing method for len

class MyList(list):
   def len(self):
        return len(self)

Often when I program against an instance I intuitively start each line
of code by writing the variable name and then a dot and then the
operation. The lack of a reversing method for len and join means that
my concentration is broken a tiny fraction of a second when I have to
remember to use another object or the global scope to find the
operation that I am after. Not a showstopper by any definition, but
irritating nonetheless.

-- 

Syver Enstad


From jcarlson at nospam.uci.edu  Wed Jan 28 16:54:19 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Wed, 28 Jan 2004 13:54:19 -0800
Subject: FRE: PEP 326 is D-E-A-D (was Re: How does compare work?)
In-Reply-To: <mailman.943.1075319213.12720.python-list@python.org>
References: <mailman.943.1075319213.12720.python-list@python.org>
Message-ID: <bv9b6e$19p$2@news.service.uci.edu>

Batista, Facundo wrote:

> Aahz wrote:
> 
> #- >Even then, what about PEP 326, which presumes to define highest and
> #- >lowest objects that can be compared with anything?
> #- 
> #- What about it?  ;-)
> #- 
> #- (Guido just posted a Pronouncement rejecting it.)
> 
> Can't find it at http://www.python.org/doc/essays/pepparade.html
> 
> I'm looking in the wrong place?
> 
> Thanks.
> 
> .	Facundo

All old, new, accepted, rejected, etc., PEPs are listed at 
http://python.org/peps/

  - Josiah


From a.schmolck at gmx.net  Mon Jan  5 11:50:59 2004
From: a.schmolck at gmx.net (Alexander Schmolck)
Date: 05 Jan 2004 16:50:59 +0000
Subject: selecting a random item from a set
References: <yfs3cb1ew6n.fsf@black132.ex.ac.uk> <3FF20AA3.7080603@v.loewis.de>
	<yfsn099d81a.fsf@black132.ex.ac.uk>
	<mailman.63.1072843171.8134.python-list@python.org>
	<yfsad58d36u.fsf@black132.ex.ac.uk>
	<mailman.12.1072937949.12720.python-list@python.org>
Message-ID: <yfs65fqtk3w.fsf@black132.ex.ac.uk>

Jp Calderone <exarkun at intarweb.us> writes:

> > choice(dict(1:"gets this", 2:"gets that", "three":"gets the key"))
> > 
> 
>   This is as broken in the current choice implementation as in the one I
> proposed.  I don't think it makes any difference to the question at hand.

The current implementation will always return values and complain if it
unsuccesfully tries a value between 0 and len(dict). I'd argue this is very
much preferable to always "succeeding" and sometimes returning a key and
sometimes returning a value.

'as



From jsbenson at bensonsystems.com  Tue Jan 13 21:05:33 2004
From: jsbenson at bensonsystems.com (John Benson)
Date: Tue, 13 Jan 2004 18:05:33 -0800
Subject: I come not to bury C++, but to praise it...
Message-ID: <001701c3da42$e54050c0$8d09500a@jsbwxp3>

Thanks for the considerate (and temperate) responses to my C++ post. I know
that language advocacy is particularly flame-prone, and find the responses
informative. Who knows? I might even change my mind about C++! But I suppose
that that's one of the dangers of participating in a dialogue.

I normally try to avoid posts based on

sprintf("All the cool guys use %s because %s\n", Myfavoritelanguages,
Mylimitedexperience)

but I most definitely fell into that trap this time around.





From ConfuseYourSpamBot-parzp at ConfuseYourSpamBot.shaw.ca  Thu Jan 22 02:59:55 2004
From: ConfuseYourSpamBot-parzp at ConfuseYourSpamBot.shaw.ca (Parzival)
Date: Thu, 22 Jan 2004 07:59:55 GMT
Subject: Nokia prefers Python
References: <mKTIlIA10uDAFwGM@jessikat.fsnet.co.uk>
Message-ID: <%pLPb.214668$X%5.181901@pd7tw2no>

Robin Becker wrote:

> This might be the start of a success story. Says Nokia prefers Python!

The referenced article quotes in part:
------------------------------------------------------------------------
"In order to get the best feedback into the viability of such technology
concept tools, initial evaluation will be restricted within Forum Nokia to
a limited group comprised of professional developers familiar with Nokia
platforms and implementations." 
 
What this means, a Nokia spokesperson tells us, is that the company won't
simply fling it at the company's 1.3 million developers, but offer a more
controlled access program. 
------------------------------------------------------------------------- 

With 1.3 million developers, Nokia should REALLY raise the Python profile.
Guido may have to move again.

Aside: The number of developers per cell phone sold must be pretty high, eh?
With so many developers wielding that powerful Python metaobject protocol
and all, its likely each cellphone user could program his or her own custom
class doing their own custom things, like planning the night's menu during
the drive home from work, in that /special/ way...

-- 

(-: Stop, smile, and enjoy your breathing :-)
-- Parzival
-- Reply-to is confuggled: parzp (@) shaw (.) ca



From sdeibel at wingide.com  Sun Jan 18 11:06:06 2004
From: sdeibel at wingide.com (Stephan Deibel)
Date: Sun, 18 Jan 2004 11:06:06 -0500 (EST)
Subject: Python Success Stories (was Re: Python used in Freedom Force)
In-Reply-To: <b68f71a7.0401180343.579a8568@posting.google.com>
Message-ID: <Pine.LNX.4.50.0401181056520.3150-100000@hedgehog>

On Sun, 18 Jan 2004, Alan James Salmoni wrote:
> Irmen de Jong <irmen at -NOSPAM-REMOVETHIS-xs4all.nl> wrote in message news:<4006911e$0$327$e4fe514c at news.xs4all.nl>...
> > Roberto Amorim wrote:
> > 
> > > Not only Freedom Force, but also Severance: Blade of Darkness (3rd-person
> > > action medieval game) and Bridge Commander (Star Trek TNG simulator).
> > 
> > And also Cyan's URU:Ages Beyond Myst.
> > I discovered some Python dlls and files in the game directory...
> > 
> > --Irmen
> 
> Perhaps all this stuff could be put onto the "Python Success Stories"
> part of the python.org website? It's not public, but if the language
> is clearly being used...

Hi,

I'm the guy that started this collection and am continuously accepting
Python Success Stories to add to the current set.  In addition to being
available online, some of the stories were published in a booklet from
O'Reilly, and I'm hoping they'll do future volumes as they did for the
Perl Success Stories.

There's information on writing a story here:

http://pythonology.org/successguide/

I can take outlines or whole stories and can answer any questions you
might have.

BTW, if you want to "franchise" the content to your own Python-oriented
website, you can do that as described here:

http://pythonology.org/success&help=1

(but please *do* cache rather than re-fetching the story from us on
every page load! ;-)

It would be great to get a fresh batch of stories going.  I've been
less than aggressive in soliciting new ones lately but would like to
get this effort moving again.

Thanks!

Stephan Deibel

--
Wing IDE for Python
Archaeopteryx Software, Inc
Take Flight!

www.wingide.com



From tzot at sil-tec.gr  Thu Jan  1 07:50:28 2004
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Thu, 01 Jan 2004 14:50:28 +0200
Subject: RELEASED: allout-vim 031229
References: <mailman.26.1072753109.8134.python-list@python.org>
	<pan.2003.12.31.05.47.10.999283@yahoo.com>
	<mailman.70.1072876780.8134.python-list@python.org>
	<pan.2003.12.31.14.49.29.838030@yahoo.com>
	<mailman.72.1072888283.8134.python-list@python.org>
Message-ID: <0t27vvkch12dcjq88q6m6hsv4jae8suqkg@4ax.com>

On Wed, 31 Dec 2003 11:25:45 -0500, rumours say that Fran?ois Pinard
<pinard at iro.umontreal.ca> might have written:

>I sometimes use French words that just happen to be English words
>as well, once done the obvious morphological changes!  The word
>"synoptique" has been part of my early youth: even in elementary school,
>teachers were bringing us into writing "plans synoptiques" to summarise
>our learning.

[and Samuel]
>> I tried googling for the term and some variations, and only turned
>> up religious sites.  I wasn't familiar with the format or the
>> terminology.  Looking up synoptic in the dictionary didn't shed much
>> light on the situation.

Trivia of the day:

Usually, words common in two languages are derived from other, older
languages --like Latin, or in this case, Greek.  And most Unix users
will be familiar with the composite noun "synopsis" (hint: man pages),
parsed as "syn" (I believe "con" as prefix in Latin) and "opsis"
("view"), which means "that which can be viewed at a glance".
"Etymology", that's another nice word :)
-- 
TZOTZIOY, I speak England very best,
Ils sont fous ces Redmontains! --Harddix


From jjl at pobox.com  Fri Jan  9 15:20:58 2004
From: jjl at pobox.com (John J. Lee)
Date: 09 Jan 2004 20:20:58 +0000
Subject: silent  saveas ?
References: <mailman.211.1073636499.12720.python-list@python.org>
Message-ID: <87wu80q3f9.fsf@pobox.com>

Mei <ebgym at tm.net.my> writes:
[...]
> I'm having difficulties to save the web browser in silent. when I try to
> use
>  
> WebBrowser1.ExecWB OLECMDID_SAVEAS, OLECMDEXECOPT_DONTPROMPTUSER,
> "c:\blank.html", "c:\blank.html"
>  
> The save window keep prompting up. How can I keep the save window in
> silent? Please help me, Thanks a lot

1. This is a Python newsgroup, and your question doesn't relate to
   Python AFAICT.

2. You can't -- the behaviour you report is a bug in IE (at least, was
   in 5.0).


John


From noemail at noemail4u.com  Mon Jan 12 07:34:28 2004
From: noemail at noemail4u.com (Dang Griffith)
Date: Mon, 12 Jan 2004 12:34:28 GMT
Subject: Debugging Python
References: <BAY99-F680yNu8O2XIC00032563@hotmail.com>
	<mailman.216.1073657197.12720.python-list@python.org>
Message-ID: <240ea7d5b9e090c1832dcfd41d455412@news.teranews.com>

On Fri, 09 Jan 2004 09:06:33 -0500, "Mike C. Fletcher"
<mcfletch at rogers.com> wrote:
...
>BTW, the Agile Programmer types have been known to suggest that 
>debuggers are entirely unnecessary, as everything should be caught by 
>more and more fine-grained unit-tests.  Seems like a nice way to go, IMO.
...

I think many PSP types would also agree with that statement, but would
also suggest that design and code review would also supplement.
    --dang


From bkelley at wi.mit.edu  Thu Jan  8 14:03:12 2004
From: bkelley at wi.mit.edu (Brian Kelley)
Date: Thu, 08 Jan 2004 14:03:12 -0500
Subject: How to insert into listbox using wxPython
In-Reply-To: <vvr25kjnd5n397@corp.supernews.com>
References: <vvr25kjnd5n397@corp.supernews.com>
Message-ID: <3ffda907$0$572$b45e6eb0@senator-bedfellow.mit.edu>

Andrew wrote:

> Hi I just started learning wxPython
> 
> I wanted to know how I could do this in wxPython
> 
> 
> self.listbox.delete(0, END)
>         for item in self.results:
>             self.listbox.insert(END, item)
> 
> 
> I don't know but I think the insert and delete things here are specific of
> Tkinter which I have been studying for the last little while
> 

# make a list box with default choices
box = wxListBox(self, -1, choices=['a','b','c'])
# append a new entry
box.Append('d')
# reset the listbox to something else
box.Set(['1','2','3'])

# delete the second entry selection
box.Delete(1)

# get the index of currently selected entry
print box.GetSelection()

# get the string that is selected
print box.GetStringSelection()

# make a callback for when an entry is selected
def listboxhandler(evt):
     box = evt.GetEventObject()
     print box.GetSelection(), "selected index"
     print box.GetStringSelection(), "selected item"

EVT_LISTBOX(box, box.GetId(), listboxhandler)

full little program
###########################################################
from wxPython.wx import *

class T(wxFrame):
     def __init__(self, parent, id, title):
         print "calling init"
         wxFrame.__init__(self, parent, id, title)
         self.mainsizer = self.sizer = wxBoxSizer(wxVERTICAL)
         # make a list box with default choices
         box = wxListBox(self, -1, choices=['a','b','c'])
         # append a new entry
         box.Append('d')
         # reset the listbox to something else
         box.Set(['1','2','3'])
         box.Delete(0)
         print box.GetSelections()
         self.sizer.Add(box, 0, wxEXPAND)
         self.SetSizer(self.sizer)
         def listboxhandler(evt):
             box = evt.GetEventObject()
             print box.GetSelection(), "selected index"
             print box.GetStringSelection(), "selected item"

         EVT_LISTBOX(box, box.GetId(), listboxhandler)

app = wxPySimpleApp()
foo = T(None, -1, "hello")
print foo
foo.Show()
app.MainLoop()


> Anyhelp would be cool
> 
> 



From fumanchu at amor.org  Sun Jan 25 21:21:12 2004
From: fumanchu at amor.org (Robert Brewer)
Date: Sun, 25 Jan 2004 18:21:12 -0800
Subject: Mod_python on Windows Troubles
Message-ID: <DE1CF2B4FEC4A342BF62B6B2B334601E561C5A@opus.amorhq.net>

Josiah Carlson wrote:
> > modules/mod_python.so" to httpd.conf, the Apache service refuses to
> > start with the following error: "Cannot load C:/Program Files/Apache
> > Group/Apache2/modules/mod_python.so into server: The 
> specified module
> 
> While I'm not using Apache or mod_python, I would be willing 
> to bet that 
> your error is the result of using 'mod_python.so' in Windows.  Try 
> 'mod_python.dll' instead.

I don't think so. I *am* using Apache2 on Windows, and it's ".so", for
sure. Sounds to me (from the error message) that mod_python.so didn't
get installed as it should have. I'm not a mod_python installation
expert, so can't recommend anything further.


FuManChu



From aahz at pythoncraft.com  Fri Jan 30 21:01:41 2004
From: aahz at pythoncraft.com (Aahz)
Date: 30 Jan 2004 21:01:41 -0500
Subject: Get error "ImportError: No module named _tkinter"
References: <bvbhl1$1td$05$1@news.t-online.com> <bvbvu4$ip$1@panix2.panix.com>
	<bvdqu5$thh$03$1@news.t-online.com>
Message-ID: <bvf2a5$hn$1@panix2.panix.com>

In article <bvdqu5$thh$03$1 at news.t-online.com>,
Sebastian Stelzer  <deadlink27 at web.de> wrote:
>Aahz wrote:
>> In article <bvbhl1$1td$05$1 at news.t-online.com>,
>> Sebastian Stelzer  <deadlink27 at web.de> wrote:
>>>
>>>    import _tkinter # If this fails your Python may not be configured for
>>>    Tk
>>>ImportError: No module named _tkinter
>>>
>>>I'am using Suse Linux 9.0 with Python 2.3.3.
>> 
>> You need to install Tck/Tk devel package, then rebuild Python.
>
>I did it and I' got the same error.
>Can you tell it more exactly please?

Did you ``make distclean`` before rebuilding?  If yes, then you're
beyond my competence; hopefully someone else will pick the ball.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

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


From worker at webmail.co.za  Thu Jan 29 08:26:26 2004
From: worker at webmail.co.za (eugene)
Date: 29 Jan 2004 05:26:26 -0800
Subject: crc-16
Message-ID: <ec254e04.0401290526.89bced6@posting.google.com>

I looked for a crc-16(crc 16) function to use but couln't find one
that worked:

This one is working ..




	def crc16(s):
		crcValue=0x0000
		crc16tab = (0x0000, 0xC0C1, 0xC181, 0x0140, 0xC301, 0x03C0, 0x0280,
0xC241, 0xC601, 0x06C0, 0x0780, 0xC741, 0x0500, 0xC5C1, 0xC481,
0x0440, 0xCC01, 0x0CC0, 0x0D80, 0xCD41, 0x0F00, 0xCFC1, 0xCE81,
0x0E40, 0x0A00, 0xCAC1, 0xCB81, 0x0B40, 0xC901, 0x09C0, 0x0880,
0xC841, 0xD801, 0x18C0, 0x1980, 0xD941, 0x1B00, 0xDBC1, 0xDA81,
0x1A40, 0x1E00, 0xDEC1, 0xDF81, 0x1F40, 0xDD01, 0x1DC0, 0x1C80,
0xDC41, 0x1400, 0xD4C1, 0xD581, 0x1540, 0xD701, 0x17C0, 0x1680,
0xD641, 0xD201, 0x12C0, 0x1380, 0xD341, 0x1100, 0xD1C1, 0xD081,
0x1040, 0xF001, 0x30C0, 0x3180, 0xF141, 0x3300, 0xF3C1, 0xF281,
0x3240, 0x3600, 0xF6C1, 0xF781, 0x3740, 0xF501, 0x35C0, 0x3480,
0xF441, 0x3C00, 0xFCC1, 0xFD81, 0x3D40, 0xFF01, 0x3FC0, 0x3E80,
0xFE41, 0xFA01, 0x3AC0, 0x3B80, 0xFB41, 0x3900, 0xF9C1, 0xF881,
0x3840, 0x2800, 0xE8C1, 0xE981, 0x2940, 0xEB01, 0x2BC0, 0x2A80,
0xEA41, 0xEE01, 0x2EC0, 0x2F80, 0xEF41, 0x2D00, 0xEDC1, 0xEC81,
0x2C40, 0xE401, 0x24C0, 0x2580, 0xE541, 0x2700, 0xE7C1, 0xE681,
0x2640, 0x2200, 0xE2C1, 0xE381, 0x2340, 0xE101, 0x21C0, 0x2080,
0xE041, 0xA001, 0x60C0, 0x6180, 0xA141, 0x6300, 0xA3C1, 0xA281,
0x6240, 0x6600, 0xA6C1, 0xA781, 0x6740, 0xA501, 0x65C0, 0x6480,
0xA441, 0x6C00, 0xACC1, 0xAD81, 0x6D40, 0xAF01, 0x6FC0, 0x6E80,
0xAE41, 0xAA01, 0x6AC0, 0x6B80, 0xAB41, 0x6900, 0xA9C1, 0xA881,
0x6840, 0x7800, 0xB8C1, 0xB981, 0x7940, 0xBB01, 0x7BC0, 0x7A80,
0xBA41, 0xBE01, 0x7EC0, 0x7F80, 0xBF41, 0x7D00, 0xBDC1, 0xBC81,
0x7C40, 0xB401, 0x74C0, 0x7580, 0xB541, 0x7700, 0xB7C1, 0xB681,
0x7640, 0x7200, 0xB2C1, 0xB381, 0x7340, 0xB101, 0x71C0, 0x7080,
0xB041, 0x5000, 0x90C1, 0x9181, 0x5140, 0x9301, 0x53C0, 0x5280,
0x9241, 0x9601, 0x56C0, 0x5780, 0x9741, 0x5500, 0x95C1, 0x9481,
0x5440, 0x9C01, 0x5CC0, 0x5D80, 0x9D41, 0x5F00, 0x9FC1, 0x9E81,
0x5E40, 0x5A00, 0x9AC1, 0x9B81, 0x5B40, 0x9901, 0x59C0, 0x5880,
0x9841, 0x8801, 0x48C0, 0x4980, 0x8941, 0x4B00, 0x8BC1, 0x8A81,
0x4A40, 0x4E00, 0x8EC1, 0x8F81, 0x4F40, 0x8D01, 0x4DC0, 0x4C80,
0x8C41, 0x4400, 0x84C1, 0x8581, 0x4540, 0x8701, 0x47C0, 0x4680,
0x8641, 0x8201, 0x42C0, 0x4380, 0x8341, 0x4100, 0x81C1, 0x8081,
0x4040)
		for ch in s:
			tmp=crcValue^(ord(ch))
			crcValue=(crcValue>> 8)^crc16tab[(tmp & 0xff)]
		return crcValue


From kkto at csis.hku.hk  Sat Jan 17 23:07:42 2004
From: kkto at csis.hku.hk (Isaac To)
Date: Sun, 18 Jan 2004 12:07:42 +0800
Subject: yield
References: <mailman.456.1074358567.12720.python-list@python.org>
Message-ID: <7iy8s5lx0x.fsf@enark.csis.hku.hk>

>>>>> "km" == km  <km at mrna.tn.nic.in> writes:

    km> Hi all, i didnt understand the purpose of 'yield' keyword and the
    km> concept of 'generators' in python.  can someone explain me with a
    km> small example how generators differ from normal function calls?

Normally, when you define a function and call it, the code within the
function gets executed, until the function returns, and at that point the
function disappear altogether.  For example:

>>> def f():
...   a = 1
...   while a < 32:
...     print 'Hello, ' + str(a)
...     return a
...     a *= 2
... 
>>> f()
Hello, 1
1

Here we define f, and at the time of definition the statements of the
function won't be executed.  Instead it is executed when the function is
called.  Once the function returns, the function disappear completely, with
all the context in the function: all the statements after the return
statement (a*=2 here) won't be executed, and the "other iterations" of the
loop will no longer execute.  Here, after printing 'Hello, 1', the function
stops, returning a value 1 to the caller (which is printed by the Python
interpretor).

When a function contains the "yield" keyword, the story is somewhat
different.  If we simply replace the "return" keyword with the "yield"
keyword in the above example we get this:

>>> def f():
...   a = 1
...   while a < 32:
...     print 'Hello, ' + str(a)
...     yield a
...     a *= 2
... 
>>> f()
<generator object at 0x4022136c>

In other words, the statements within the function will not be invoked even
when we call f()!  Instead, calling f() returns you an object, which is said
to be a "generator" object.  The basic method of this object is "next".  For
example:

>>> g = f()
>>> g.next()
Hello, 1
1

So, the effect of f().next() in the function using "yield" is exactly the
same as f() in the function using "return".  The difference in the current
version is that we still have an object g, so... we can call next() again!

>>> g.next()
Hello, 2
2
>>> g.next()
Hello, 4
4
>>> g.next()
Hello, 8
8
>>> g.next()
Hello, 16
16
>>> g.next()
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
StopIteration

In other words, after the function f yields, the function and the execution
context has not disappear.  Instead it is still stored within the generator
object, waiting for you to call next() again.  At that point the function
continues its execution.  If during the execution the function yields
another value, g.next() returns the value of that value and f is stopped
again.  If during the execution the function returns, g.next() throws an
exception StopIteration (and will do that again if you call g.next() again).

This is a powerful construct: this is the only Python construct that let you
easily "remember" the dynamic execution structure.  (Most other language
lacks that facility so it is impossible to remember the dynamic execution
structure, short of packaging all the information you want in structure.)
In the above example, after the first execution of next(), the g object
remembers (in its "frame object", which can be located by g.gi_frame) what
local variables are defined and what values they hold, which line the
function is currently executing at, and what global variables are currently
visible:

>>> g = f()
>>> g.next()
Hello, 1
1
>>> dir(g.gi_frame)
['__class__', '__delattr__', '__doc__', '__getattribute__', '__hash__', '__init__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__str__', 'f_back', 'f_builtins', 'f_code', 'f_exc_traceback', 'f_exc_type', 'f_exc_value', 'f_globals', 'f_lasti', 'f_lineno', 'f_locals', 'f_restricted', 'f_trace']
>>> g.gi_frame.f_locals
{'a': 1}
>>> g.gi_frame.f_lineno
5
>>> g.gi_frame.f_globals
{'__builtins__': <module '__builtin__' (built-in)>, '__name__': '__main__', '__doc__': None, 'g': <generator object at 0x4022146c>, 'f': <function f at 0x40219f44>}

The simplest way to use the construct, and also by far the most common use
of it, is to use it as an "iterator", i.e., to repeatedly call it in a loop
until it finishes throw a StopIteration exception.  E.g.,

>>> for i in f():
...   print i * 3 + 7
... 
Hello, 1
10
Hello, 2
13
Hello, 4
19
Hello, 8
31
Hello, 16
55

Here the "for" loop will call the next() method of the generator returned by
f() repeatedly, each time getting the returned value into the variable i and
execute the "body" of the for loop (which prints the value i*3+7).  Similar
things happen in list-comprehensions:

>>> [i * 3 + 7 for i in f()]
Hello, 1
Hello, 2
Hello, 4
Hello, 8
Hello, 16
[10, 13, 19, 31, 55]

Note that, apart from printing the 'Hello, n' messages, both of the above
have the end-effect that f() is the list [1, 2, 4, 8, 16].  So you can treat
a generator as a "lazy" list that (1) an element will be generated
"on-the-fly" when next() is called, and thus may be affected by the changes
in the environment like the global variables, and may in reverse affect the
environment like printing message and changing the global variables; and (2)
after producing the element, the element itself will not be kept by the
generator.

Regards,
Isaac.


From ramen at lackingtalent.com  Sun Jan 18 14:42:58 2004
From: ramen at lackingtalent.com (Dave Benjamin)
Date: Sun, 18 Jan 2004 19:42:58 -0000
Subject: Does anyone else not find the fun in programming...?
References: <d232c5e.0401130823.27fd26ff@posting.google.com>
	<4004f5ac$0$69931$edfadb0f@dread12.news.tele.dk>
	<slrnc0jc91.75d.ramen@lackingtalent.com>
	<400a7a92$0$205$edfadb0f@dread12.news.tele.dk>
Message-ID: <slrnc0loum.u28.ramen@lackingtalent.com>

In article <400a7a92$0$205$edfadb0f at dread12.news.tele.dk>, Max M wrote:
> Dave Benjamin wrote:
> 
>> In article <4004f5ac$0$69931$edfadb0f at dread12.news.tele.dk>, Max M wrote:
> 
>> What Python libraries do you use to do algorithmic composition? I played
>> around with Snack (for Tcl) awhile back but couldn't get decent realtime
>> performance so I gave up on the idea for the time being. I'm very interested
>> to hear what sort of techniques you use.
> 
> First of I don't use realtime...

I figured... =)

> I create lists of notes::
> 
> class Note:
> 
>      def __init__(self, time=0, pitch=64, velocity=64, duration=96):
>          self.time = time
>          self.pitch = pitch
>          self.velocity = velocity
>          self.duration = duration
> 
>      def __str__(self):
>          r = []
>          a = r.append
>          a('time %s' % self.time)
>          a('pitch %s' % self.pitch)
>          a('velocity %s' % self.velocity)
>          a('duration %s' % self.duration)
>          return '\n'.join(r)
> 
> That are then converted into midi files by a very simple wrapper layer.
> 
> This simple structure makes it extremely simple to create 
> transformations on a list of notes. I considder each list a "part" like 
> you see it in Cubase/Logic.
> 
> The idea is then to create a personal library of transformations and 
> generators that expres your own musical style. I also have a few 
> routines for repeating/extending/sequencing these parts.

So, a data-flow style more or less... that seems to be a useful model for
music software. Have you ever played around with Max?

> I import these midi files into software like Cubase, or Reason or Orion. 
> Where they drive either hardware or software synths.
> 
> I like to fiddle around with the sounds manually by twiddleling the knobs.
> 
> But I don't change the mnusic manually in the sequencer software. Rather 
> i change the software and genereate a new midi file, that I reload.
> 
> It is a bit like writing code generators. And it is completely flexible, 
> creative and fun due to the ease of Python.

Yeah, makes perfect sense to me. Do you have any Python-generated songs
available? Sounds really cool.

The thing I was working on was a probabilistic beat generator, based on
statistics of when a certain drum would hit in a beat for a selection of hip
hop songs. I was trying to capture the "feel" rather than the exact sequence
of sounds. I still have the (tcl) source laying around here somewhere. It
worked pretty well on Linux (I could actually get it to beat-match) but in
Windows the performance was terrible. Which is probably because I'd have to
be out of my mind to think I could get realtime performance out of Tcl. ;)

Thanks, Max...

-- 
.:[ dave benjamin (ramenboy) -:- www.ramenfest.com -:- www.3dex.com ]:.
: d r i n k i n g   l i f e   o u t   o f   t h e   c o n t a i n e r :


From ralph at sluiters.de  Mon Jan  5 14:58:04 2004
From: ralph at sluiters.de (Ralph Sluiters)
Date: Mon, 5 Jan 2004 20:58:04 +0100
Subject: Problem: 'Threads' in Python?
Message-ID: <btcfjc$pgu$1@nets3.rz.RWTH-Aachen.DE>

Hi,
i've got a small problem with my python-script. It is a cgi-script, which is
called regulary (e.g. every 5 minutes) and returns a xml-data-structure.
This script calls a very slow function, with a duration of 10-40 seconds. To
avoid delays, i inserted a cache for the data. So, if the script is called,
it returns the last caculated data-structure and then the function is called
again and the new data is stored in the cache. (There is no problem to use
older but faster data)

My problem is, that the client (A Java program (or browser, command line))
waits, until the whole script has ended and so the cache is worthless. How
can I tell the client/browser/... that after the last print line there is no
more data and it can proceed? Or how can I tell the python script, that
everything after the return of the data (the retieval of the new data and
the storage in a file) can be done in an other thread or in the background?

Greetings

Ralph




From tjreedy at udel.edu  Sun Jan 25 21:13:50 2004
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 25 Jan 2004 21:13:50 -0500
Subject: [OPINION] - does language really matter if they
	alldothe	samething?
References: <69A0D4AB81C51447AD6BA387782B8D64093D8A@midl-mail4.etcconnect.com><028FD9F0-4E01-11D8-BB78-0003934ACDEC@zdome.net><4011C497.1040302@prescod.net><58587302-4E30-11D8-8FAB-0003934ACDEC@zdome.net><buua42$vop$1@sea.gmane.org>
	<D3AD8358-4F90-11D8-BCE5-0003934ACDEC@zdome.net>
Message-ID: <bv1t4e$2fh$1@sea.gmane.org>


"Dietrich Epp" <dietrich at zdome.net> wrote in message
news:D3AD8358-4F90-11D8-BCE5-0003934ACDEC at zdome.net...
>
> On Jan 24, 2004, at 9:30 AM, Terry Reedy wrote:
>
> > I slightly prefer my Python version, but I suspect you will not, so you
> > remain safe.
>
> You prefer infinite recursion?

Given that my incomplete, you-fill-in-the-blanks, "Maybe something like"
this, Python code, translated directly from your Lisp code, would not even
compile, and that we were talking about the relative convenience and
aethestics of equivalent code in different languages, this response strikes
me as a bit odd.  Oh well.

As I understood your lisp version of random_sword_magic_power(quality),
recursive calls are only needed when quality = good, while the two
recursive calls then made would only be made with quality = medium, hence
the recursion would (should) stop one level down.  To make this happen with
the Python version, add a first statement "something like"

    double = (quality == good) and (random_sword_magic_power(medium) +
         random_sword_magic_power(medium)) or None

and substitute double for the double call in the argument list for
choose-random-assoc().

I assume that in your code, the same recursion base-casing is hidden within
the no-source-given choose-random-assoc macro, by how it rewrites the text
of its 'arguments'.  I suspect that if choose-random-assoc were an
ordinarily lisp function, including in CL, with arguments evaluated before
the call, then random_sword_magic_power() would have to explicitly
conditionalize its recursive call, just as in other languages.  If so, then
one very much does have to know that c-r-a is a macro in order to use it
efficiently and not write a redundant base-case check.

Terry J. Reedy






From ark at acm.org  Fri Jan 23 00:55:25 2004
From: ark at acm.org (Andrew Koenig)
Date: Fri, 23 Jan 2004 05:55:25 GMT
Subject: I support PEP 326
References: <mailman.654.1074788734.12720.python-list@python.org>
	<401081A1.E4C34F00@alcyone.com>
	<roy-1E6566.21133122012004@reader2.panix.com>
Message-ID: <hH2Qb.91181$6y6.1837343@bgtnsc05-news.ops.worldnet.att.net>

> I suppose you could special-case min() and max() to return the
> appropriate singletons if called with no arguments.
>
> There's something very nice about that.  There's also something very
> ugly about it.  I'm having a hard time deciding which is stronger :-)

I'm afraid it's not right, because calling min() with no arguments should
return Max and calling max() with no arguments should return Min.

This behavior is correct because it preserves the intuitive property that if
s1 and s2 are (possibly empty) sequences, min(min(s1),min(s2)) should be
equal to min(s1+s2), and similarly for max.  If you like, Max is the
identity element for min and Min is the identity element for max.




From jblazi at hotmail.com  Sun Jan 11 05:14:57 2004
From: jblazi at hotmail.com (jblazi)
Date: Sun, 11 Jan 2004 11:14:57 +0100
Subject: Emacs python mode question
References: <pan.2004.01.10.21.08.16.172000@hotmail.com>
	<mailman.274.1073771373.12720.python-list@python.org>
	<pan.2004.01.10.22.04.08.125000@hotmail.com>
	<mailman.275.1073773564.12720.python-list@python.org>
Message-ID: <pan.2004.01.11.10.14.55.843000@hotmail.com>

On Sat, 10 Jan 2004 16:25:59 -0600, Skip Montanaro wrote:

> (define-key esc-map [g] 'goto-line)

For one reason or the other, this does not work. (I tried several such
options before posting.)
When I do this (and save .emacs and restart Emacs of course) I get the
message

Set face default (M-g d) ...

in the command line buffer.

jb


----== Posted via Newsfeed.Com - Unlimited-Uncensored-Secure Usenet News==----
http://www.newsfeed.com The #1 Newsgroup Service in the World! >100,000 Newsgroups
---= 19 East/West-Coast Specialized Servers - Total Privacy via Encryption =---


From peter at engcorp.com  Tue Jan 20 11:39:04 2004
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 20 Jan 2004 11:39:04 -0500
Subject: SystemError while execing bad code
References: <mailman.543.1074599606.12720.python-list@python.org>
Message-ID: <400D59A8.ADF3C2F3@engcorp.com>

Gerrit Holl wrote:
> 
> I found a cool way to trigger a SystemError:
> 
> >>> exec CodeType(0,0,0,0,"",(),(),(),"","",0,"")
> XXX lineno: 0, opcode: 0
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
>   File "/usr/lib/python2.2/site-packages/", line 0, in
>     File "/usr/lib/python2.2/site-packages/", line 0, in
> SystemError: unknown opcode
> 
> The documentation says:
> You should report this to the author or maintainer of your Python
> interpreter. Be sure to report the version of the Python interpreter
> (sys.version; it is also printed at the start of an interactive Python
> session), the exact error message (the exception's associated value) and
> if possible the source of the program that triggered the error.
> 
> Although it probably shouldn't be taken literally in this case...
> ...or should it :-)?
> 
> Hmm, and this actually *hangs*:
> >>> exec CodeType(0,0,0,0,"",(),(),(),"","",2**31-1,"")
> XXX lineno: 2147483647, opcode: 0
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
>   File "/usr/lib/python2.2/site-packages/", line 2147483647, in
> 
> ...
> 
> But I guess this is a case of "so don't do it" :-)?

I once experimented, briefly, with doing "genetic programming" (evolving
programs to solve problems) using Python bytecode.  In effect, this meant
that random sequences of bytes were being executed as though they were 
valid compiled Python programs.

The interpreter crashed rapidly and frequently.  I quickly concluded
that the interpreter is designed to be safe in executing bytecode that
is generated by a proper Python compiler, and that the compiler did not
generate random bytecodes most of the time.

Had to abandon that idea, though in principle it's still very cool.

-Peter


From !!!salvatore.didio at wanadoo.fr  Sat Jan 24 10:42:29 2004
From: !!!salvatore.didio at wanadoo.fr (Salvatore)
Date: Sat, 24 Jan 2004 16:42:29 +0100
Subject: Tkinter Base Window
In-Reply-To: <401257c4$0$26116$afc38c87@news.optusnet.com.au>
References: <401257c4$0$26116$afc38c87@news.optusnet.com.au>
Message-ID: <buu3kj$8t9$1@news-reader2.wanadoo.fr>

Peter Moscatt wrote:
> Ok....  I am pretty new to Python (as you may have gathered from previous
> posts).  So now it time for another one of my ridiculous questions....  :-)
> 
> When using 'Tkinter', what is used as the base window to work from, meaning
> what widget do I use to place all other widgets onto to create a custom
> dialog ?
> 
> Pete
> 
Here you can find what you search and more ;-)
http://www.pythonware.com/library/tkinter/introduction/

Regards

Salvatore



From carroll at tjc.com  Tue Jan 13 20:32:36 2004
From: carroll at tjc.com (Terry Carroll)
Date: Wed, 14 Jan 2004 01:32:36 GMT
Subject: Unicode and exception strings
References: <svl1xq98gdc.fsf@dresden.uio.no>
	<cf0uvv4m34rgcgoi2nfj3hcgugbah82k96@4ax.com>
	<svl4qv17gw8.fsf@dresden.uio.no>
Message-ID: <oj6900hku41dphjdep4t54cc9l0jggq195@4ax.com>

On 12 Jan 2004 08:41:43 +0100, Rune Froysa <rune.froysa at usit.uio.no>
wrote:

>Terry Carroll <carroll at tjc.com> writes:
>
>> On 09 Jan 2004 13:18:39 +0100, Rune Froysa <rune.froysa at usit.uio.no>
>> wrote:
>> 
>> >Assuming an exception like:
>> >
>> >  x = ValueError(u'\xf8')
>> >
>> >AFAIK the common way to get a string representation of the exception
>> >as a message is to simply cast it to a string: str(x).  This will
>> >result in an "UnicodeError: ASCII encoding error: ordinal not in
>> >range(128)".
>> >
>> >The common way to fix this is with something like
>> >u'\xf8'.encode("ascii", 'replace').  However I can't find any way to
>> >tell ValueErrors __str__ method which encoding to use.
>> 
>> Rune, I'm not understanding what your problem is.
>> 
>> Is there any reason you're not using, for example, just repr(u'\xf8')?
>
>The problem is that I have little control over the message string that
>is passed to ValueError().  All my program knows is that it has caught
>one such error, and that its message string is in unicode format.  I
>need to access the message string (for logging etc.).
>
>>          _display_text = _display_text + "%s\n" % line.decode('utf-8'))
>
>This does not work, as I'm unable to get at the 'line', which is
>stored internally in the ValueError class (and generated by its __str_
>method).

You should be able to get at it via x.args[0]:

>>> x = ValueError(u'\xf8')
>>> x.args[0]
u'\xf8'

The only thing is, what to do with it once you get there.  I don't think
0xF8 is a valid unicode encoding on its own.  IIRC, it's part of a
multibyte character.

You can try to extract it as above, and then decode it with the codecs
module, but if it's only the first byte, it won't decode correctly:

>>> import codecs
>>> d = codecs.getdecoder('utf-8')
>>> x.args[0]
u'\xf8'
>>> d.decode(x.args[0])
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
AttributeError: 'builtin_function_or_method' object has no attribute
'decode'
>>>

But, still, if all you want is to have *something* to print out explaining
the exception, you can use repr():

>>> repr(x.args[0])
"u'\\xf8'"
>>>

Is this helping any, or am I just flailing around?


From adonisv at REMOVETHISearthlink.net  Mon Jan 12 10:51:55 2004
From: adonisv at REMOVETHISearthlink.net (Adonis)
Date: Mon, 12 Jan 2004 15:51:55 GMT
Subject: Moving widgets in Tkinter
References: <qVgMb.3119$q4.2242@newsread3.news.atl.earthlink.net>
	<bttono$241$1@news-reader2.wanadoo.fr>
Message-ID: <vozMb.5076$i4.657@newsread1.news.atl.earthlink.net>

Thanks a million, works like a charm!

Just another problem arose *grumble*, trying to get it to work with multiple
frames, almost there but no cigar.

Adonis





From max at alcyone.com  Sun Jan 18 21:21:49 2004
From: max at alcyone.com (Erik Max Francis)
Date: Sun, 18 Jan 2004 18:21:49 -0800
Subject: Python Text Adventure Authoring System
References: <bufcp0$h36fj$1@ID-221199.news.uni-berlin.de>
	<100mf8ial58jf57@corp.supernews.com>
Message-ID: <400B3F3D.408DD1A4@alcyone.com>

Francis Avila wrote:

> I don't want to stop you, but I warn you that developing a system like
> this
> is far more complex than you think.

Also, it's a pretty mature field in terms of existing technology.  There
are dozens of authoring systems, including half a dozen or so major
ones:

http://www.alcyone.com/max/links/if.html#Authoring__authoring_systems

-- 
 __ Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
/  \ San Jose, CA, USA && 37 20 N 121 53 W && &tSftDotIotE
\__/ Do we really want to go to Mars / Do we really want to try
    -- Cassandra Wilson


From claird at lairds.com  Thu Jan 15 15:23:10 2004
From: claird at lairds.com (Cameron Laird)
Date: Thu, 15 Jan 2004 20:23:10 -0000
Subject: [OT] AS/400
References: <mailman.352.1074092092.12720.python-list@python.org>
	<bu4a5n$k9$6@atlantis.news.tpi.pl> <4005cd03@news.mt.net.mk>
	<bu6l68$8uv$1@atlantis.news.tpi.pl>
Message-ID: <100dtle1tldg730@corp.supernews.com>

In article <bu6l68$8uv$1 at atlantis.news.tpi.pl>,
Jarek Zgoda  <jzgoda at gazeta.usun.pl> wrote:
>?????? ? <mk at net.mail.penguinista> pisze:
>
>>> (will not mention that it works on AS/400, the best
>>> minicomputer(!) ever made).
>> 
>> Why is it the best minicomputer ever made?
>> I really want to know!
>
>Since nobody ever produced any other. Only IBM produced machines that
>can be called "midrange" (something between microcomputer and "real
>computer", the famous S/390 mainframe). They still use this terminology.
			.
			.
			.
Sneaky, Jarek; but there were a LOT of "minicomputer"
manufacturers, including DEC, Data General, HP, Prime,
...
-- 

Cameron Laird <claird at phaseit.net>
Business:  http://www.Phaseit.net


From hans at zephyrfalcon.org  Tue Jan 13 20:09:36 2004
From: hans at zephyrfalcon.org (Hans Nowak)
Date: Tue, 13 Jan 2004 20:09:36 -0500
Subject: Does anyone else not find the fun in programming...?
In-Reply-To: <20040113210157.GD6601@unpythonic.net>
References: <d232c5e.0401130823.27fd26ff@posting.google.com>
	<20040113210157.GD6601@unpythonic.net>
Message-ID: <400496D0.1020301@zephyrfalcon.org>

Jeff Epler wrote:
>>>>assert "programming" is "fun"
> 
> AssertionError   # I'm going home

Try: assert "programming is fun"

:-)

-- 
Hans (hans at zephyrfalcon.org)
http://zephyrfalcon.org/




From jcarlson at nospam.uci.edu  Fri Jan 30 15:04:45 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Fri, 30 Jan 2004 12:04:45 -0800
Subject: Safe to modify globals(), or not?
In-Reply-To: <mailman.1015.1075431531.12720.python-list@python.org>
References: <6714766d.0401291559.45413e0d@posting.google.com>
	<mailman.1015.1075431531.12720.python-list@python.org>
Message-ID: <bvedh2$7h7$1@news.service.uci.edu>


>>Fair enough. However, is there anything wrong with modifying globals()
> 
> 
> No.  "globals()['a'] = 3" is exactly the same as "a=3" executed at module
> scope, outside of functions.  The purpose is to allow you to set a variable
> whose name you do not know until runtime.  An example, as in your
> application, is when the name comes from user input.

I personally enjoy modifying globals() as it suits my needs.  Another 
statement that is quite useful is global.
 >>> def set_global_k(i):
...     global k
...     k = i
...
 >>> set_global_k(5)
 >>> k
5
 >>> set_global_k(6)
 >>> k
6
 >>>

Really only useful for when you know the name of the variable before 
runtime, but then again, one could always:
 >>> def set_global_name(i, name):
...     exec('global %s;%s = i'%(name, name))
...
 >>> set_global_name(10, 'l')
 >>> l
10


MMM, global manipulation.  Now if only there was a python function for 
global dominance, though perhaps globals().clear() is sufficient. 
Mua-hah-hah.

  - Josiah


From eric.brunel at N0SP4M.com  Thu Jan  8 11:01:22 2004
From: eric.brunel at N0SP4M.com (Eric Brunel)
Date: Thu, 08 Jan 2004 17:01:22 +0100
Subject: Calling a function dynamically
References: <924a9f9c.0401080742.39eba581@posting.google.com>
Message-ID: <btjud5$vet$1@news-reader3.wanadoo.fr>

Paradox wrote:
> I would like to call a function whose name I supply at runtime.
> Something like this but it didn't work
> 
> functionName = 'run'
> instance = ClassDef()
> args = [1, 2]
> 
> #want the dynamic equivalant of
> #instance.run(*args)
> 
> #This didn't work cause there was no __call__ attribute. Why?
> value = instance.__call__[functionName](*args)

The "function" is in fact a method on the instance, that is handled like a 
regular attribute. So using getattr should do what you want:

value = getattr(instance, functionName)(*args)

__call__ is for a completely different purpose, which is to define instances 
that behave like functions:

 >>> class Spammer:
...     def __call__(self):
...             print 'spam'
...
 >>> o = Spammer()
 >>> o()
spam


HTH
-- 
- Eric Brunel <eric dot brunel at pragmadev dot com> -
PragmaDev : Real Time Software Development Tools - http://www.pragmadev.com



From glenfant at NOSPAM.bigfoot.com  Thu Jan 29 11:24:26 2004
From: glenfant at NOSPAM.bigfoot.com (Gilles Lenfant)
Date: Thu, 29 Jan 2004 17:24:26 +0100
Subject: regexp upward compatibility bug ?
References: <bvb7bb$2hr8$1@biggoron.nerim.net>
	<mailman.984.1075389591.12720.python-list@python.org>
Message-ID: <bvbbsl$2kjk$1@biggoron.nerim.net>

"Jeff Epler" <jepler at unpythonic.net> a ?crit dans le message de
news:mailman.984.1075389591.12720.python-list at python.org...
> The problem is the use of '-' in the character groups, like
>     r'[\w-]'
>
[...]
>
> Jeff
>

Jeff,

Many thanks for the time you spent for my enlightenments. I fixed the stuff
with your help.

--
Gilles




From emile at fenx.com  Sun Jan  4 11:26:30 2004
From: emile at fenx.com (Emile van Sebille)
Date: Sun, 4 Jan 2004 08:26:30 -0800
Subject: how to make a code object a function
References: <bt93ds$tuv$00$1@news.t-online.com>
	<bt96ll$75c$02$1@news.t-online.com>
	<bt9cd0$t3q$01$1@news.t-online.com>
Message-ID: <bt9eog$4lk23$1@ID-11957.news.uni-berlin.de>

Diez B. Roggisch:
> Just out of curiosity - is there a way to know the name of a code
object you
> know nothing about except that it will become a function definition?
I
> guess I could go for some AST-stuff looking for a "def foo"
statement, so I
> know I will end up having defined foo when exec'ing the code object.
>

I'm not quit sure what you're asking, but does sets help?

>>> ns = locals().keys()
>>> testing = 1
>>> print sets.Set(locals().keys()) - sets.Set(ns)
Set(['testing'])


Emile van Sebille
emile at fenx.com



From dkuhlman at rexx.com  Mon Jan 19 16:28:44 2004
From: dkuhlman at rexx.com (Dave Kuhlman)
Date: Mon, 19 Jan 2004 13:28:44 -0800
Subject: Simple question from Python newb... What am I doing wrong? For
	x, y, z in aTuple:
References: <FNXOb.10918$AA6.1283@fed1read03>
Message-ID: <buhi49$i49rc$1@ID-139865.news.uni-berlin.de>

Amy G wrote:

> I have a whole bunch of tuples that look something like this,
> 
> aTuple = ('1074545869.6580.msg', 't_bryan_pw at gmcc.ab.ca', 'Your
> one stop prescriptions')
> 
> now that I have this I try
> 
> for x, y, z in aTuple:
>     do something with x
>     do something with y
>     do something with z
> 
> But I am getting the error that there are too many values to
> unpack. If I do...

The "for" statement processes each item in a sequence object.  The
first object in your sequence object (aTuple) is a string.  The
string has more that three characters.  So, that string cannot be
unpacked into your three variables x, y, and z.

In contrast, consider the following:

    >>> value = (('aa', 'bb', 'cc'), ('dd', 'ee', 'ff'))
    >>> for x, y, z in value:
        print 'x:', x
        print 'y:', y
        print 'z:', z
        
    x: aa
    y: bb
    z: cc
    x: dd
    y: ee
    z: ff
    >>> 

In this example, the first item in the tuple is itself a tuple
with three items.  Therefore, it can be unpacked into the
variables x, y, and z.

Dave

-- 
http://www.rexx.com/~dkuhlman
dkuhlman at rexx.com


From seanl at chaosring.org  Sat Jan  3 03:58:41 2004
From: seanl at chaosring.org (Sean R. Lynch)
Date: Sat, 03 Jan 2004 00:58:41 -0800
Subject: Creating a capabilities-based restricted execution system
Message-ID: <LmmdnUn4seDeGWuiXTWc-w@speakeasy.net>

I've been playing around with Zope's RestrictedPython, and I think I'm 
on the way to making the modifications necessary to create a 
capabilities-based restricted execution system. The idea is to strip out 
any part of RestrictedPython that's not necessary for doing capabilities 
and do all security using just capabilities.

The basic idea behind capabilities is that you don't give any piece of 
code you don't trust a reference to something you don't want it to have 
access to. You use proxies instead (E calls them "facets").

In order to be able to allow untrusted code to create proxy objects, I 
needed to be able to store a reference to the proxied object in a 
private attribute.

To create private attributes, I'm using "name mangling," where names 
beginning with X_ within a class definition get changed to 
_<uuid>_<name>, where the UUID is the same for that class. The UUIDs 
don't need to be secure because it's not actually possible to create 
your own name starting with an underscore in RestrictedPython; they just 
need to be unique across all compiler invocations.

The nice thing about using this name mangling is that it's only done at 
compile time and doesn't affect runtime performance. An interesting side 
effect is that code defined on a class can access private attributes on 
all descendants of that class, but only ones that are defined by other 
code on that class, so this isn't a security issue.

I was thinking I needed read-only attributes to be able to avoid 
untrusted code's being able to sabotage the revoke method on a proxy 
object, but I'm thinking that just keeping around a reference to the 
revoke method in the original code may be enough.

Does anyone think I'm going in completely the wrong direction here? Am I 
missing anything obvious?


From phil at riverbankcomputing.co.uk  Sat Jan 17 08:09:38 2004
From: phil at riverbankcomputing.co.uk (Phil Thompson)
Date: Sat, 17 Jan 2004 13:09:38 +0000
Subject: ANN: PyQt v3.10 Released
Message-ID: <200401171309.38718.phil@riverbankcomputing.co.uk>

Riverbank Computing is pleased to announce the release of PyQt v3.10 available
from http://www.riverbankcomputing.co.uk/.

PyQt is a comprehensive set of Qt bindings for the Python programming language
and supports the same platforms as Qt.  Like Qt, PyQt is available under the
GPL (for UNIX, Linux and MacOS/X), a commercial license (for Windows, UNIX,
Linux and MacOS/X) and a free educational license (for Windows).

PyQt is implemented as a set of 9 extension modules containing 300 classes and
over 5,750 functions and methods.

PyQt also includes bindings to QScintilla, the port to Qt of the Scintilla
editor component.

PyQt can be used either as a rapid prototyping tool, or as an alternative to
C++ for developing large Qt applications.

PyQt includes the pyuic utility which generates Python code to implement user
interfaces created with Qt Designer in the same way that the uic utility
generates C++ code.

Third party tools are also available - such as eric3, a comprehensive IDE
(including an editor, debugger, class browser, integration with Qt Designer,
re-factoring tools, unit testing tools and integration with source code
control systems).  eric3 is written entirely using PyQt and is available from
http://ww.die-offenbachs.de/detlev/eric3.html.




From mwilson at the-wire.com  Sun Jan  4 20:20:22 2004
From: mwilson at the-wire.com (Mel Wilson)
Date: Sun, 04 Jan 2004 20:20:22 -0500
Subject: Why does this fail?
References: <vvhdlm72386b3c@corp.supernews.com>
Message-ID: <WvL+/ks/KTjD089yn@the-wire.com>

In article <vvhdlm72386b3c at corp.supernews.com>,
"Dave Murray" <dlmurray at micro-net.com> wrote:
>New to Python question, why does this fail?
>
>---testcase.py---
>import sys, urllib, htmllib
>def Checkit(URL):
>    try:
>        print "Opening", URL
>        f = urllib.open(URL)
>        f.close()
>        return 1
>    except:
Here, try
     except Exception, details
         print "Exception:", details
>        return 0
>
>rtfp = Checkit("http://www.python.org/doc/Summary.html")
>if rtfp == 1:
>    print "OK"
>else:
>    print "Fail"

Then you'll see

Opening http://www.python.org/doc/Summary.html
Exception: 'module' object has no attribute 'open'
Fail


You probably mean urlopen .

        Regards.        Mel.


From ketulp_baroda at yahoo.com  Wed Jan 14 04:13:56 2004
From: ketulp_baroda at yahoo.com (ketulp_baroda at yahoo.com)
Date: 14 Jan 2004 01:13:56 -0800
Subject: what is best for web development??
References: <f046efac.0401100358.5aa812a0@posting.google.com>
	<87wu80559x.fsf@blakie.riol>
	<f046efac.0401120330.5c2e7c50@posting.google.com>
	<87oet9grqy.fsf@blakie.riol>
	<e9570f37.0401121052.ed79710@posting.google.com>
Message-ID: <f046efac.0401140113.4aed2460@posting.google.com>

hi 
the application should work with Apache or IIS web server.


From jolsen at mail2world.com  Wed Jan 28 08:01:51 2004
From: jolsen at mail2world.com (Jesper Olsen)
Date: 28 Jan 2004 05:01:51 -0800
Subject: newsgroup lib
Message-ID: <6b17fa95.0401280501.4be454cb@posting.google.com>

Is there a python module for accessing newsgroup articles?

Something similar to urllib for downloading web pages...

Cheers
Jesper


From vdebaere at lilly.csoft.net  Sun Jan 18 12:59:49 2004
From: vdebaere at lilly.csoft.net (Vincent De Baere)
Date: Sun, 18 Jan 2004 18:59:49 +0100
Subject: xml.dom.minidom childnodes
In-Reply-To: <1074448002.18656.33.camel@dev.internal>
References: <400abcab$0$780$ba620e4c@news.skynet.be>
	<1074448002.18656.33.camel@dev.internal>
Message-ID: <400AC995.2080102@lilly.csoft.net>

Mark McEahern wrote:

>On Sun, 2004-01-18 at 11:04, Vincent De Baere wrote:
>  
>
>>As you can see in the xml file, there is a newline after the (root) 
>>documentelement. I guess that's why I need to use menurootchildren[1] 
>>instead of menurootchildren[0] to access the first child.
>>    
>>
>
>Why not use getElementsByTagName and punt on the whole variable
>whitespace as childNodes business?
>  
>
That seems to be the solution indeed! Thank you!

Vincent



From bart_nessux at hotmail.com  Thu Jan 22 17:41:13 2004
From: bart_nessux at hotmail.com (Bart Nessux)
Date: Thu, 22 Jan 2004 17:41:13 -0500
Subject: HDD Stress Test with Python
Message-ID: <bupji9$c2f$1@solaris.cc.vt.edu>

A bit off topic, but here goes: Does this look like a reasonable hard 
drive stress-test? I run it repeatedly for a few days on our new 
PowerMac G5's (they come with Python 2.3 installed!!!) which we've had 
drive problems with. Two 80GB SATA Maxtor drives replaced already. Only 
been in use for a few days. Apple is replacing them with Seagate drives, 
not that that matters. Here's the script:

def dd_test():
    import os
    import time
    print
    print "DDing first partition to second partition... please wait."
    fp = os.popen("/bin/dd if=/dev/disk0s3 of=/dev/disk0s5", "r")
    fp
    fp.close()
    print "DD has completed."
    print
    print "Formatting first partition UFS"
    print
    fp1 = os.popen("/sbin/newfs /dev/disk0s3", "r")
    fp1
    fp1.close()
    print
    print "Formatting second partition UFS"
    print
    fp2 = os.popen("/sbin/newfs /dev/disk0s5", "r")
    fp2
    fp2.close()
    print "Sleeping 60 seconds before starting again..."
    print
    time.sleep(60)
    dd_test()
dd_test()

# Make two equal sized partitions on Mac internal HDD.
# Unmount the internal HDD, boot from firewire drive
# and run script.
# Used 'pdisk /dev/disk0 -dump' to get info about drive.
# Used 'newfs /dev/disk0s3' to format a partition UFS.



From rmkrauter at yahoo.com  Mon Jan 26 21:32:28 2004
From: rmkrauter at yahoo.com (Rich Krauter)
Date: Mon, 26 Jan 2004 21:32:28 -0500
Subject: efficient updating of nested dictionaries
In-Reply-To: <bv2e21$j5e$2@news.service.uci.edu>
References: <H%_Qb.2609$925.1917@nwrddc02.gnilink.net>
	<mailman.786.1075088534.12720.python-list@python.org>
	<bv2e21$j5e$2@news.service.uci.edu>
Message-ID: <1075170748.4050.4.camel@vaio>

Oh crap. Sorry about the html emails. I've been meaning to turn that
off. Thanks for reminding me.
Rich



From donn at drizzle.com  Sun Jan 25 13:38:31 2004
From: donn at drizzle.com (Donn Cave)
Date: Sun, 25 Jan 2004 18:38:31 -0000
Subject: any news client in Python?
References: <2b4c49e0.0401230915.3438810f@posting.google.com>
	<4de76ee2.0401241125.45e77f9e@posting.google.com>
Message-ID: <1075055910.305663@yasure>

Quoth davidb at mcs.st-and.ac.uk (David Boddie):
...
| I wrote my own newsreader for a minority platform, too:
|
|     http://www-solar.mcs.st-and.ac.uk/~davidb/Software/Python/NewsRead/
|
| There are probably others lurking in FTP archives.
|
| I have to admit that my own attempt isn't exactly the best example you
| could hope for. My excuse is that I had to create my own widget set at
| the same time as writing the application. If I still had to use it, I
| would probably rewrite it, or at least refactor it severely.

That's my story too, but the way I deal with it is to present my
BeOS newsreader and IMAP email reader as a demo application for the
widget set, hence a built-in excuse for its lameness.  I never even
got around to the "add group" interface you show there.  A really good
newsreader is a lot of work (and of course its users are by definition
the USENET crowd, not people you want to have to deal with!)  But it
wasn't much of an issue, because each BeOS user tended to write his
own newsreader for some reason - much easier to tolerate the defects
of your own software, I suppose.

	Donn Cave, donn at drizzle.com


From bh at intevation.de  Tue Jan 13 12:40:59 2004
From: bh at intevation.de (Bernhard Herzog)
Date: Tue, 13 Jan 2004 18:40:59 +0100
Subject: Design Question
References: <73b00f0c.0401130928.595842c0@posting.google.com>
Message-ID: <6qfzejoifo.fsf@salmakis.intevation.de>

ferrell at diablotech.com (Robert Ferrell) writes:

> My question is about how to architect a class hierarchy where some
> methods are nearly identical between a superclass and a subclass, but
> differ slightly.  For example:
>
> class Sup(object):
>    def __init__(self):
>       self.specialFlag = False
>    def aMeth(self):
>        <do some stuff>
>        <if self.specialFlag, do a special thing>
>        <do more stuff>
>
> class Sub(Sup):
>   def __init__(self):
>     self.specialFlag = True

A commonly used alternative would be 

class Sup(object):
   def aMeth(self):
       <do some stuff>
       self.specialMethod()
       <do more stuff>
   def specialMethod(self):
       pass

class Sub(Sup):
   def specialMethod(self):
       <do a special thing>



   Bernhard

-- 
Intevation GmbH                                 http://intevation.de/
Sketch                                 http://sketch.sourceforge.net/
Thuban                                  http://thuban.intevation.org/


From sross at connectmail.carleton.ca  Fri Jan  9 12:14:26 2004
From: sross at connectmail.carleton.ca (Sean Ross)
Date: Fri, 9 Jan 2004 12:14:26 -0500
Subject: how to speedup this code?
References: <btmgtp$grr$1@chessie.cirr.com>
Message-ID: <ZhBLb.107755$BA6.2041451@news20.bellglobal.com>

"Ognen Duzlevski" <maketo at gronland.freeshell.org> wrote in message
news:btmgtp$grr$1 at chessie.cirr.com...
> Hi all,
>
> I have rewritten a C program to solve a bioinformatics problem. Portion
where most of the time is spent is:
>
> def DynAlign(scoremat,insertmat,delmat,tseq,qseq,tlen,qlen):
>     global ONEINDELPENALTY,OPENGAPPENALTY
>
>     for ndx1 in range(1,tlen+1):
>         for ndx2 in range(1,qlen+1):
>             delmat[ndx1][ndx2] = Min(delmat[ndx1-1][ndx2]+ONEINDELPENALTY,
\
>
Min(scoremat[ndx1-1][ndx2]+OPENGAPPENALTY+ONEINDELPENALTY, \
>
insertmat[ndx1-1][ndx2]+OPENGAPPENALTY+ONEINDELPENALTY))
>             insertmat[ndx1][ndx2] =
Min(insertmat[ndx1][ndx2-1]+ONEINDELPENALTY, \
>
Min(scoremat[ndx1][ndx2-1]+OPENGAPPENALTY+ONEINDELPENALTY, \
>
delmat[ndx1][ndx2-1]+OPENGAPPENALTY+ONEINDELPENALTY))
>             scoremat[ndx1][ndx2] = Min(scoremat[ndx1-1][ndx2-1], \
>                             Min(delmat[ndx1-1][ndx2-1],
insertmat[ndx1-1][ndx2-1])) + \
>                             GetFitnessScore(tseq,ndx1-1,qseq,ndx2-1)
>
> def Min(a,b):
> if a< b:
> return a
> else:
> return b
>
> In C this is not a big deal, delmat, scoremat and insertmat are int
matrices dynamically allocated and the
> loop-inside-a-loop is pretty fast. However, on python (2.3) it is very
slow. So for comparison, my C version takes 8
> seconds to execute and the python version takes around 730 seconds. I have
narrowed down through visual observation
> (print before and print after entry into the above nested loop) that most
of the time is spent in there. I have also
> tried the Numeric package with their arrays. It speeded things up somewhat
but not considerably.
>
> Any suggestions?
>
> Thank you,
> Ognen

Hi.
There is a builtin min() function, so using that should speed things up a
little. Also, you calculate
"OPENGAPPENALTY+ONEINDELPENALTY" 4 times inside the loop. Outside the loop,
store
the value of this sum in a variable, say P(?). You also calculate ndx-1 and
ndx2-1
5 and 7 times, respectively, so you may want to store those values in temp.
variables -
say prerow, and precol.  range(1,qlen+1) is evaluated tlen times - if qlen
does not change, then
storing this result would be a good idea, using, say, 'columns'.

There are other things, though perhaps not speed related:

You have three near indentical operations that could be refactored into a
function:

def calculate_score(m, n, o, row, col, p0, p1, p2):
    # you can choose a more appropriate function name
    m_val = m[row][col]+p0
    n_val = n[row][col]+p1
    o_val = o[row][col]+p2
    return min(m_val, min(n_val, o_val))

This may actually slow things down, so you may not want to use this
function.
So, if you use these suggestions, you'll end up with something like this
[untested]:

def DynAlign(scoremat,insertmat,delmat,tseq,qseq,tlen,qlen):
     global ONEINDELPENALTY,OPENGAPPENALTY
     OIP = ONEINDELPENALTY
     P =  OPENGAPPENALTY+ONEINDELPENALTY
     s,i,d = scoremat,insertmat,delmat
     columns = range(1,qlen+1)
     for row in range(1,tlen+1):
         prerow = row - 1
         for col in columns:
             precol = col - 1
             FSP = GetFitnessScore(tseq,prerow,qseq,precol)
             delmat[row][col] = calculate_score(d,s,i,prerow,col,OIP,P,P)
             insertmat[row][col] = calculate_score(i,s,d,row,precol,OIP,P,P)
             scoremat[row][col] =
calculate_score(s,d,i,prerow,precol,0,0,FSP)


OK, so, HTH
Sean




From tzot at sil-tec.gr  Mon Jan 19 04:29:59 2004
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Mon, 19 Jan 2004 11:29:59 +0200
Subject: YA string interpolation and printing idea
References: <7x3caf5mga.fsf_-_@ruckus.brouhaha.com>
	<4008B9CE.CC140EF@alcyone.com> <7xwu7r6utj.fsf@ruckus.brouhaha.com>
Message-ID: <gk8n005kohqq4g39hul6huj7i0ta2f71fg@4ax.com>

On 16 Jan 2004 20:52:08 -0800, rumours say that Paul Rubin
<http://phr.cx at NOSPAM.invalid> might have written:

>Maybe if type/object
>unification proceeds far enough, we'll someday be able to define our
>own operations on builtin objects like strings.

I'd like that too, and I believe Ruby does it; however, ISTR that Guido
has specifically said that this won't be allowed, since you can always
subclass the base types.  He's the boss :)

I've also seen a hackish patch (by MWH? can't be sure) that allowed one
to substitute their own classes for the base types (so that integer or
string constants would be instances of the derived subclasses).  Don't
know if that would help you in your code.
-- 
TZOTZIOY, I speak England very best,
Ils sont fous ces Redmontains! --Harddix


From jjhuang at cm.nctu.edu.tw  Mon Jan  5 22:16:57 2004
From: jjhuang at cm.nctu.edu.tw (Chun-Chieh Huang)
Date: Tue, 06 Jan 2004 11:16:57 +0800
Subject: Embedding python problem, related to PyObject_Print.
Message-ID: <m27k05ix5i.fsf@cm.nctu.edu.tw>

Dear all,

I carefully lookup PyObject_Print in the API manual, but I can't find
the resolution. And the problem is described below:

I embed python into C++ code as follows:

// First register function objects
pModule = PyImport_ImportModule("merge");
pDict = PyModule_GetDict(pModule);
pFunc = PyObject_GetAttrString(pModule, "TopoCreator");
PyObject	*theArg = PyString_FromString("FOSS");
theTopoDesigner = PyObject_CallFunctionObjArgs(pFunc, theArg);
addPiconet_Topo = PyObject_GetAttrString(theTopoDesigner,"addPiconet");

// Create 
PyObject	*tmpList = PyList_New(maxNumber);
// setting values of tmpList
PyObject_Print(tmpList, stdout, 0);
pValue = PyObject_CallFunctionObjArgs(addPiconet_Topo, tmpList);

The problem is that if I comment out the line "PyObject_Print," I'll
get an error message:
"TypeError: addPiconet() takes exactly 2 arguments (3 given)"
But if I add back the PyObject_Print line, it works as
expected. However, I don't need PyObject_Print when the system is
finished; I use it for debugging purpose. The "addPiconet" method
takes a list as an argument, which is declared as: 
def addPiconet(self, aList):
    Blah blah blah

I really don't know how to solve it. How can I make it work without
PyObject_Print? Any suggestion? Thanks in advance.

Albert
-- 
Chun-Chieh Huang, aka Albert    E-mail: jjhuang AT cm.nctu.edu.tw
???                         
Department of Computer Science  
National Tsing Hua University   MIME/ASCII/PDF/PostScript are welcome!
HsinChu, Taiwan                 NO MS WORD DOC FILE, PLEASE!


From cygnus at cprogrammer.org  Wed Jan 21 18:25:49 2004
From: cygnus at cprogrammer.org (Jonathan Daugherty)
Date: Wed, 21 Jan 2004 18:25:49 -0500
Subject: Need help with Python class idioms
In-Reply-To: <kNDPb.6494$6o4.181@fe2.texas.rr.com>
References: <mailman.611.1074719029.12720.python-list@python.org>
	<kNDPb.6494$6o4.181@fe2.texas.rr.com>
Message-ID: <20040121232549.GA28328@mail.theserver.ath.cx>

# ... what if mandatoryVar1 was set to False?

To all who have responded to me as such: of course, how one
treats the variable in a boolean context depends on what its
semantically "false" value is.  You do the math; I just
provided a syntax alternative. :)

-- 

  Jonathan Daugherty
  http://www.cprogrammer.org

  "It's a book about a Spanish guy called Manual, you should read it."
                                                            -- Dilbert



From jjl at pobox.com  Tue Jan 13 13:07:47 2004
From: jjl at pobox.com (John J. Lee)
Date: 13 Jan 2004 18:07:47 +0000
Subject: Why learn Python ??
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<877jzwg1v2.fsf@pobox.com>
	<95aa1afa.0401130628.7992e9e1@posting.google.com>
Message-ID: <87y8sb90y4.fsf@pobox.com>

michele.simionato at poste.it (Michele Simionato) writes:

> jjl at pobox.com (John J. Lee) wrote in message news:<877jzwg1v2.fsf at pobox.com>..
> > Eiffel: Design by contract.  The book to read is Meyer's "Object-
> >  Oriented Software Construction".  Full of interesting stuff, if you can
> >  stand his self-importance ;-)
> 
> I couldn't!

:-))

I admit I have nowhere near finished it either, but more due to my
slowness and the book's vastness than the manner of discourse.

The irritation he inspires *is* productive, as Michael Hudson says.


John


From Rici.Yu at noaa.gov  Wed Jan 14 10:43:47 2004
From: Rici.Yu at noaa.gov (Rici.Yu)
Date: Wed, 14 Jan 2004 10:43:47 -0500
Subject: Interrupt an extension module function
Message-ID: <400563B3.64870BD@noaa.gov>

Hi all,

It seems that python does not interrupt a C-extension module function
when a user types CTRL-C.  I am not sure this is the expected behavior
as this is first time I came across this problem. If it is, what do I
have to do to let the user interrupt a long-running extension function?

Thanks.
-Rici



From jcarlson at uci.edu  Wed Jan 21 11:48:09 2004
From: jcarlson at uci.edu (Josiah Carlson)
Date: Wed, 21 Jan 2004 08:48:09 -0800
Subject: Interfacing with Voice modem
References: <mailman.581.1074690882.12720.python-list@python.org>
Message-ID: <20040121084657.FB37.JCARLSON@uci.edu>

> A callcenter-like app that we are writing in Python will need recording
> functionality for voice conversations.  I am thinking of doing this through
> a voice modem.
> 
> Any suggestions on how to interface with a voice modem from Python?

1. Get the C source for doing it.
2. Wrap it up for python calls with SWIG.
3. Cross your fingers.

 - Josiah



From kirk at strauser.com  Thu Jan 22 10:05:38 2004
From: kirk at strauser.com (Kirk Strauser)
Date: Thu, 22 Jan 2004 15:05:38 GMT
Subject: Secure Voting software
References: <20040121174434.28446.00000428@mb-m15.aol.com>
	<7xvfn4lq9m.fsf@ruckus.brouhaha.com> <87zncgy544.fsf@strauser.com>
	<slrnc0um0n.flo.bignose-hates-spam@iris.polar.local>
Message-ID: <87y8s0yql4.fsf@strauser.com>

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

At 2004-01-22T04:36:55Z, Ben Finney <bignose-hates-spam at and-benfinney-does-too.id.au> writes:

> Security is much more than just cryptography.

I wasn't implying otherwise.  However, being exposed to the level of
engineering required to get that one small part of the system right is
humbling.
- -- 
Kirk Strauser
The Strauser Group
Open. Solutions. Simple.
http://www.strausergroup.com/
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iD4DBQFAD+Xq5sRg+Y0CpvERAv3iAKCHyQEMaKj8a8CJQorrEsHj6DPZ+ACVF5uv
ZTfsNz29lr8FBE1vUSyZ4A==
=ePzg
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From shaleh at speakeasy.net  Mon Jan  5 20:43:23 2004
From: shaleh at speakeasy.net (Sean 'Shaleh' Perry)
Date: Mon, 5 Jan 2004 17:43:23 -0800
Subject: indendation question
In-Reply-To: <3FF9E883.BC8AB864@engcorp.com>
References: <20031226033210.GA24039@mrna.tn.nic.in>
	<mailman.130.1072540438.684.python-list@python.org>
	<3FF9E883.BC8AB864@engcorp.com>
Message-ID: <200401051743.23650.shaleh@speakeasy.net>

On Monday 05 January 2004 14:43, Peter Hansen wrote:
> > Well the "official" standard can be seen in the python files distributed
> > with python -- 4 spaces.
> >
> > That said, Python will use any whitespace you want as long as you are
> > consistent.  3 spaces, a tab, whatever.
>
> Well, *almost* any whitespace. :-)
>
> >>> import string
> >>> string.whitespace
>
> '\t\n\x0b\x0c\r '
>
> Of those, only '\t' and ' ' are going to be much help, I think, when trying
> to indent.  Linefeed, carriage return, vertical tab, and form feed are
> most likely not well supported yet. ;-)
>
> -Peter

(-: Point taken, I must remember to be more careful when wearing my teaching 
hat.

Thanks.




From ih8spam at spamtrap.com  Wed Jan 14 10:42:41 2004
From: ih8spam at spamtrap.com (WTH)
Date: Wed, 14 Jan 2004 10:42:41 -0500
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<n22Nb.11299$9k7.210522@news.xtra.co.nz>
	<bu2pgs$d123a$1@ID-207230.news.uni-berlin.de>
	<4004EC9E.1E2E2893@alcyone.com> <bu3iv2$n2u$4@tyfon.itea.ntnu.no>
Message-ID: <100aonoarjllhb2@corp.supernews.com>

Sadly, Brandon doesn't 'realize' this at all, he apparently believes that if
the OSS movement does not do what he hoped it would that it's basically
*crap*.

This is the crux of every problem Brandon has with educated adults.  If
something doesn't work out his way, or if people don't give him what he
wants (this week's wants that is), or he doesn't finish yet another hair
brained project, the problem is always somewhere other than himself.

He's the unluckiest genius-design crack-developer of games ever...

    WTH

"Bent C Dalager" <bcd at pvv.ntnu.no> wrote in message
news:bu3iv2$n2u$4 at tyfon.itea.ntnu.no...
> In article <4004EC9E.1E2E2893 at alcyone.com>,
> Erik Max Francis  <max at alcyone.com> wrote:
> >
> >If you're saying that you've come to the realization that volunteer
> >programers on a project with which you only have a passing interest
> >won't follow your orders and do whatever you say, I'd say pointing that
> >out is less like "denigration" and more like "common goddamn sense."
>
> It is, never the less, worth pointing out. It would seem that Brandon
> entered the scene with an idea that OSS developers might be incredibly
> useful to him for some reason or other. Other game developers might
> very well have the same idea. When Brandon finds out that this is not
> the case and describes in some detail why OSS won't do the job for
> him, than this can certainly be useful for other game developers to
> learn so that don't have to spend 6 months figuring out the exact same
> thing themselves.
>
> The conclusion may seem obvious to _you_ but this is no guarantee that
> everyone else also possesses this knowledge. OSS is being hailed as
> the second coming, and it comes as no surprise therefore that some
> people might be deluded into thinking they could harness this power to
> cure cancer overnight or land a man on Mars by 2005.
>
> Cheers
> Bent D
> -- 
> Bent Dalager - bcd at pvv.org - http://www.pvv.org/~bcd
>                                     powered by emacs




From crap at crud.com  Sat Jan 10 14:30:51 2004
From: crap at crud.com (Moosebumps)
Date: Sat, 10 Jan 2004 19:30:51 GMT
Subject: Setting up test for XML-RPC
References: <cDPLb.2260$nl3.2178@newssvr29.news.prodigy.com><aIPLb.2261$oo3.640@newssvr29.news.prodigy.com>
	<mailman.269.1073759787.12720.python-list@python.org>
Message-ID: <KpYLb.8134$Ea4.5043@newssvr27.news.prodigy.com>

>     MB> But the second question still stands.  I am running both the
client
>     MB> and server on my own machine now (Windows 2000).  Would I just
need
>     MB> Python and web server if they were different machines?  I would
like
>     MB> to avoid installing a bunch of software on the 20 machines if
>     MB> possible.
>
> You should be able to build a server and a client with just the standard
> Python distribution.

Really?  That would be awesome.  But I don't see how that works... what do
you enter for the URL?  (right now it is just http://localhost, but
obviously I would need to specify 20 different machines for my system.  They
are just bare Windows XP Pro machines with a default installation.  They're
"Windows Server" machines, I don't think.

If performance is an issue (it will be if you are
> passing large chunks of data back and forth), there are some things you
can
> do to speed it up:
>
>     * Install Fredrik Lundh's sgmlop module.
>
>     * Marshal or pickle your data first, then base64 encode them before
>       passing them to or fro.  This greatly reduces the number of XML tags
>       on-the-wire, and thus the encode/decode time and data size.
>       Obviously, this only works if you are talking Python-to-Python.
>
>     * Tweak things to gzip-encode the traffic between server and client.
>
>     * Use the xmlrpclib.MultiCall class to bundle logical multiple calls
>       into a single physical XML-RPC call.

Thanks for these suggestions.

MB




From nospam at nopes  Sat Jan  3 11:34:36 2004
From: nospam at nopes (Steve)
Date: Sun, 04 Jan 2004 03:34:36 +1100
Subject: End of file?
In-Reply-To: <mh6dvvcka6829s85lhfm53diu3ou7huuav@4ax.com>
References: <3ff665fb$1@clarion.carno.net.au>
	<mh6dvvcka6829s85lhfm53diu3ou7huuav@4ax.com>
Message-ID: <3ff6eefc$1@clarion.carno.net.au>



Rene Pijlman wrote:
> Steve:
> 
>>I'm having trouble finding out if output from a pipe has finished (i.e. 
>>I can't find tell if there's a EOF in output.readlines()). How do I do 
>>this? Because readlines() can return empty lines and I can't simply 
>>check if the line is empty.
> 
> 
> You don't get an EOF from readlines().
> 
> "readlines([sizehint]) 
> 
> Read until EOF using readline() and return a list containing the lines
> thus read."
> 
> http://www.python.org/doc/current/lib/bltin-file-objects.html
> 

Thanks :)



From skip at pobox.com  Sun Jan 25 16:34:22 2004
From: skip at pobox.com (Skip Montanaro)
Date: Sun, 25 Jan 2004 15:34:22 -0600
Subject: Guardian: open source is a throwback says Jack Schofield
In-Reply-To: <64cff82f.0401251143.328388bd@posting.google.com>
References: <64cff82f.0401251143.328388bd@posting.google.com>
Message-ID: <16404.13918.738120.967955@montanaro.dyndns.org>


    malcolmny> Why you can't get something for nothing
    malcolmny> Jack Schofield Jan 22 2004
    ...
    malcolmny> If you are really going to do these things, you need to hire
    malcolmny> several reliable programmers with kernel-level skills"

Of course, this is only necessary if your company wants to go it completely
alone.  The fact that Linux is Open Source doesn't mean you can't delegate
the function of finding "several reliable programmers with kernel-level
skills" to Linux vendors like Red Hat.

    malcolmny> "Indeed, the whole progress of commercial computing has been
    malcolmny> from expensive hand-written, bug-ridden, company-specific
    malcolmny> programs to cheaper but more powerful off-the-shelf
    malcolmny> packages. From that point of view, open source is a
    malcolmny> throwback."

I fail to see the author's logic here.  In what way does he think that Open
Source software can't be treated as "cheaper but more powerful off-the-shelf
software"?  It's just not off a vendor's proprietary shelf.

Does Jack Schofield perhaps work for SCO? <wink>

Skip



From bignose-hates-spam at and-benfinney-does-too.id.au  Wed Jan 21 23:33:43 2004
From: bignose-hates-spam at and-benfinney-does-too.id.au (Ben Finney)
Date: 22 Jan 2004 15:23:43 +1050
Subject: python
References: <mailman.626.1074743244.12720.python-list@python.org>
Message-ID: <slrnc0ulqf.flo.bignose-hates-spam@iris.polar.local>

On Thu, 22 Jan 2004 14:17:20 +1030, Jess Martin wrote:
> i need help.

    <http://www.catb.org/~esr/faqs/smart-questions.html>

> im just learning to program

Congratulations; hopefully you'll have a lot of fun.  Python is a great
language to be your first.

> every time i try to do a command more than a line long it wont work

As you'll read in the above URL on "How To Ask Questions The Smart Way",
you'll need to tell us a litle more about what's going on for someone to
be able to help you.  Please read the document for more guidelines.

-- 
 \        "If you go parachuting, and your parachute doesn't open, and |
  `\        you friends are all watching you fall, I think a funny gag |
_o__)          would be to pretend you were swimming."  -- Jack Handey |
Ben Finney <http://bignose.squidly.org/>


From jsbenson at bensonsystems.com  Fri Jan  2 02:17:16 2004
From: jsbenson at bensonsystems.com (John Benson)
Date: Thu, 1 Jan 2004 23:17:16 -0800
Subject: undo/redo, windows clipboard
Message-ID: <035f01c3d100$73f90290$6401a8c0@jsbwxp3>

With respect to:

Message: 13
Date: Thu, 1 Jan 2004 18:38:47 -0800 (PST)
From: black <quiteblack at yahoo.com>
Subject: undo and redo ?
To: python-list at python.org
Message-ID: <20040102023847.78427.qmail at web21326.mail.yahoo.com>
Content-Type: text/plain; charset="us-ascii"

I'm coding with Tkinter and i wonder whether we could get current OS'
clipboard available, and event more, anyone can inspires me how we can
achieve undo and redo function ?

(end quote)

I don't know about undo/redo, but I have sent stuff out of Python via the
clipboard. What works for me (courtesy of Mark Hammond) is:

import win32clipboard, win32con


        win32clipboard.OpenClipboard()
        win32clipboard.EmptyClipboard()
        win32clipboard.SetClipboardText('your string here')
        win32clipboard.CloseClipboard()

I found out that if I didn't empty the clipboard before adding to it, the
new data sometimes ended up in the Microsoft Office clipboard, sometimes
not. Now it just shows up each and every time in the plain old Windows
clipboard.







From jjl at pobox.com  Mon Jan 19 08:24:54 2004
From: jjl at pobox.com (John J. Lee)
Date: 19 Jan 2004 13:24:54 +0000
Subject: secure unpickle?
References: <bufkot$96vl$1@netnews.upenn.edu>
Message-ID: <8765f8xe8p.fsf@pobox.com>

"Yun Mao" <maoy at cis.upenn.edu> writes:

> Hi, I'm looking for a way in unpickling, or equivalent, such that can only
> unpickle (or is limited to) simple data structure, such as number, string,
> list, tuples.

marshal

The docs have similar warnings, though.

What's are you trying to do?


I'm amazed that WAYTTD isn't a standard USENET acronym by now...


John


From newsgroups at jhrothjr.com  Tue Jan 20 16:36:23 2004
From: newsgroups at jhrothjr.com (John Roth)
Date: Tue, 20 Jan 2004 16:36:23 -0500
Subject: an example of a singleton design pattern in python?
References: <hc63caapdui.fsf@praxis.lsil.com>
	<645r00hicslg2qn55sncentdk8alnbevab@4ax.com>
Message-ID: <100r7t75eqsj436@news.supernews.com>


"Rene Pijlman" <reply.in.the.newsgroup at my.address.is.invalid> wrote in
message news:645r00hicslg2qn55sncentdk8alnbevab at 4ax.com...
> Daniel Ortmann:
> >Does anyone have an example of a singleton design pattern in python?
>
>
http://aspn.activestate.com/ASPN/search?query=singleton&section=PYTHONCKBK&type=Subsection

The "cannonical" singleton for new style classes is in:

http://www.python.org/2.2.3/descrintro.html

See the section on overriding the __new__() method.

John Roth
>
> -- 
> Ren? Pijlman




From whiteywidow at yahoo.com  Tue Jan 20 21:28:35 2004
From: whiteywidow at yahoo.com (rt lange)
Date: Wed, 21 Jan 2004 02:28:35 GMT
Subject: Jython and SciTE
Message-ID: <Xns9476DAC159131whiteywidowyahoocom@216.77.188.18>

I'm trying to get my jython scripts running and compiling on SciTE.
This is what I have in my python.properties file:

command.name.1.*.py=Go Jython
command.1.*.py=jython $(FileNameExt)
command.1.subsystem.*.py=1
command.name.2.*.py=Jython -> jar
command.2.*.py=jythonc --core --jar $(FileName).jar $(FileNameExt)
command.2.subsystem.*.py=1

I keep getting this output:
>jython DiceRoll.py
>The system cannot find the file specified.


It works fine from the command line (PATH is set correctly).


From thitucad6tim at jetable.org  Wed Jan 28 02:30:18 2004
From: thitucad6tim at jetable.org (Nicolas Lehuen)
Date: Wed, 28 Jan 2004 08:30:18 +0100
Subject: Python 2.3.3 : Win32 build vs Cygwin build performance ?
References: <4016a71d$0$15004$afc38c87@news.easynet.fr>
	<4016d8a3$0$19263$626a54ce@news.free.fr>
	<bv74fr$1sdl$1@netnews.upenn.edu>
Message-ID: <40176510$0$19279$626a54ce@news.free.fr>

One of my test machine was a 2,4 Ghz P4 (without hyperthreading), the other
an Athlon XP 2500+, both with 512 Mb of RAM and running under Windows XP.

In fact if I directly launch the test\pystones.py script, I dot get
marginally better results using the Win32 build :

E:\Documents and Settings\Nico>python E:\Python23\Lib\test\pystone.py
Pystone(1.1) time for 50000 passes = 1.36434
This machine benchmarks at 36647.7 pystones/second

$ python /lib/python2.3/test/pystone.py
Pystone(1.1) time for 50000 passes = 1.492
This machine benchmarks at 33512.1 pystones/second

So there must be something weird in the hotshot scripts... The cygwin build
being slightly slower than the pure Win32 build is something that feels much
more sensible.

Regards,
Nicolas

"Paul M" <pmagic at snet.net> a ?crit dans le message de news:
bv74fr$1sdl$1 at netnews.upenn.edu...
> Nicolas Lehuen wrote:
>
> > I have reproduced this on another machine. I tried playing with the
> > optimizer options (-O, -OO) and the result is the same : on pystone,
Cygwin
> > 1.5.6-1 + Python 2.3.3-1 is nearly twice as better as the standard
Python
> > 2.3.3 distribution for Win32...
> >
> > I have checked that both distribution are psyco-free. Does anyone have
an
> > idea of what is going on there ? Better compilation optimisation
settings ?
> > GCC 3.3.1 producing faster code than MSVC 6 (allright, I can imagine
that,
> > but twice faster ???) ?
> >
> > Regards
> > Nicolas
> >
>
> I get results opposite yours (though with an oddity in the CPU seconds
> reported on the Win32 build -- see below).
>
> I'm also using Cygwin 1.5.6-1 + 2.3.3-1 and the stock Python 2.3.3
> distribution for Win32.
>
> Here's my cygwin results:
>
> $ time python /usr/lib/python2.3/hotshot/stones.py
> Pystone(1.1) time for 50000 passes = 2.813
> This machine benchmarks at 17774.6 pystones/second
>           850004 function calls in 5.825 CPU seconds
>
>     Ordered by: internal time, call count
>
>     ncalls  tottime  percall  cumtime  percall filename:lineno(function)
>      50000    2.148    0.000    2.207    0.000 pystone.py:184(Proc6)
>      50002    1.102    0.000    1.102    0.000 pystone.py:45(__init__)
>          1    0.662    0.662    5.825    5.825 pystone.py:79(Proc0)
>      50000    0.435    0.000    4.188    0.000 pystone.py:133(Proc1)
>      50000    0.340    0.000    0.340    0.000 pystone.py:208(Proc8)
>     150000    0.182    0.000    0.182    0.000 pystone.py:203(Proc7)
>     150000    0.181    0.000    0.181    0.000 pystone.py:221(Func1)
>      50000    0.170    0.000    0.226    0.000 pystone.py:229(Func2)
>      50000    0.163    0.000    1.265    0.000 pystone.py:53(copy)
>      50000    0.152    0.000    0.214    0.000 pystone.py:160(Proc3)
>      50000    0.103    0.000    0.103    0.000 pystone.py:149(Proc2)
>      50000    0.072    0.000    0.072    0.000 pystone.py:177(Proc5)
>      50000    0.059    0.000    0.059    0.000 pystone.py:246(Func3)
>      50000    0.056    0.000    0.056    0.000 pystone.py:170(Proc4)
>          1    0.000    0.000    5.825    5.825 pystone.py:67(pystones)
>          0    0.000             0.000          profile:0(profiler)
>
>
>
> real    0m35.403s
> user    0m34.827s
> sys     0m0.233s
>
>
> And my Win 32 results:
>
> C:\Documents and Settings\pmagwene>python
c:\Python23\Lib\hotshot\stones.py
> Pystone(1.1) time for 50000 passes = 2.44903
> This machine benchmarks at 20416.3 pystones/second
>           850004 function calls in 6559.446 CPU seconds
>
>     Ordered by: internal time, call count
>
>     ncalls  tottime  percall  cumtime  percall filename:lineno(function)
>          1 1689.491 1689.491 6559.412 6559.412 pystone.py:79(Proc0)
>      50000  987.212    0.020 2610.494    0.052 pystone.py:133(Proc1)
>      50000  775.010    0.016  775.010    0.016 pystone.py:208(Proc8)
>      50000  416.668    0.008  637.938    0.013 pystone.py:53(copy)
>     150000  409.522    0.003  409.522    0.003 pystone.py:221(Func1)
>      50000  406.804    0.008  535.380    0.011 pystone.py:229(Func2)
>     150000  396.484    0.003  396.484    0.003 pystone.py:203(Proc7)
>      50000  310.752    0.006  445.215    0.009 pystone.py:160(Proc3)
>      50000  290.596    0.006  410.274    0.008 pystone.py:184(Proc6)
>      50000  239.539    0.005  239.539    0.005 pystone.py:149(Proc2)
>      50002  221.310    0.004  221.310    0.004 pystone.py:45(__init__)
>      50000  150.247    0.003  150.247    0.003 pystone.py:170(Proc4)
>      50000  146.099    0.003  146.099    0.003 pystone.py:177(Proc5)
>      50000  119.678    0.002  119.678    0.002 pystone.py:246(Func3)
>          1    0.033    0.033 6559.446 6559.446 pystone.py:67(pystones)
>          0    0.000             0.000          profile:0(profiler)
>
>
>
> The Pystone time and machine benchmark shows that my Win32 build is
> faster, though I don't understand the CPU seconds readout -- the pystone
> benchmark did not last 1.5 hrs!
>
> Maybe it's something odd about my setup? -- dual Xeons (hyperthreading
> enabled), 2.5 GB ram, WinXP...
>
> --Paul




From gerrit at nl.linux.org  Sat Jan  3 11:50:41 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Sat, 3 Jan 2004 17:50:41 +0100
Subject: Filename type (Was: Re: finding file size)
In-Reply-To: <bt6c23$c6u$07$1@news.t-online.com>
References: <4V4Jb.12709$Vl6.2811218@news20.bellglobal.com>
	<bt3l9i$pog$07$3@news.t-online.com>
	<mailman.45.1073125105.12720.python-list@python.org>
	<bt6c23$c6u$07$1@news.t-online.com>
Message-ID: <20040103165041.GA31412@nl.linux.org>

Peter Otten wrote:
> http://mail.python.org/pipermail/python-list/2002-June/108425.html
> 
> http://members.rogers.com/mcfletch/programming/filepath.py
> 
> has an implementation of your proposal by Mike C. Fletcher. I think both
> filename class and os.path functions can peacefully coexist.

Thanks for the links.
(I think they don't, by the way)

yours,
Gerrit.

-- 
19. If he hold the slaves in his house, and they are caught there, he
shall be put to death.
          -- 1780 BC, Hammurabi, Code of Law
-- 
Asperger's Syndrome - a personal approach:
	http://people.nl.linux.org/~gerrit/english/



From nomail at nospam.net  Fri Jan  9 06:57:58 2004
From: nomail at nospam.net (Olaf Meyer)
Date: Fri, 09 Jan 2004 11:57:58 GMT
Subject: Python 2.3.3 compilation problems an HP-UX
Message-ID: <aHwLb.6203$g4.135307@news2.nokia.com>

I'm having some problems compiling Python 2.3.3 on HP-UX (B.11.00).
I've tried sevral different options for the configure script (e.g. 
enabling/disabling gcc, aCC) but I always get the same problem during 
the final linking stage. Several PyThread_* symbols are undefined (for 
details see the output below).

In order to get DCOracle2 support working I've also set the LDFLAGS 
environment variable to "-lpthread -lcl" (as mentioned in the 
README.HP-HX file).

I would really appreciate any advice!

Here's the output of the final stage of my build process:

         rm -f libpython2.3.a
         ar cr libpython2.3.a Modules/getbuildinfo.o
         ar cr libpython2.3.a Parser/acceler.o  Parser/grammar1.o 
Parser/listnode.o  Parser/node.o  Parser/parser.o  Parser/parsetok.o 
Parser/bitset.o  Parser/metagrammar.o  Parser/firstsets.o 
Parser/grammar.o  Parser/pgen.o Parser/myreadline.o Parser/tokenizer.o
         ar cr libpython2.3.a Objects/abstract.o  Objects/boolobject.o 
Objects/bufferobject.o  Objects/cellobject.o  Objects/classobject.o 
Objects/cobject.o  Objects/complexobject.o  Objects/descrobject.o 
Objects/enumobject.o  Objects/fileobject.o  Objects/floatobject.o 
Objects/frameobject.o  Objects/funcobject.o  Objects/intobject.o 
Objects/iterobject.o  Objects/listobject.o  Objects/longobject.o 
Objects/dictobject.o  Objects/methodobject.o  Objects/moduleobject.o 
Objects/object.o  Objects/obmalloc.o  Objects/rangeobject.o 
Objects/sliceobject.o  Objects/stringobject.o  Objects/structseq.o 
Objects/tupleobject.o  Objects/typeobject.o  Objects/weakrefobject.o 
Objects/unicodeobject.o Objects/unicodectype.o
         ar cr libpython2.3.a Python/bltinmodule.o  Python/exceptions.o 
  Python/ceval.o  Python/compile.o  Python/codecs.o  Python/errors.o 
Python/frozen.o  Python/frozenmain.o  Python/future.o  Python/getargs.o 
  Python/getcompiler.o  Python/getcopyright.o  Python/getmtime.o 
Python/getplatform.o  Python/getversion.o  Python/graminit.o 
Python/import.o  Python/importdl.o  Python/marshal.o 
Python/modsupport.o  Python/mystrtoul.o  Python/mysnprintf.o 
Python/pyfpe.o  Python/pystate.o  Python/pythonrun.o 
Python/structmember.o  Python/symtable.o  Python/sysmodule.o 
Python/traceback.o  Python/getopt.o  Python/dynload_hpux.o 
Python/thread.o
         ar cr libpython2.3.a Modules/config.o  Modules/getpath.o 
Modules/main.o  Modules/gcmodule.o
         ar cr libpython2.3.a Modules/threadmodule.o 
Modules/signalmodule.o  Modules/posixmodule.o  Modules/errnomodule.o 
Modules/_sre.o  Modules/_codecsmodule.o  Modules/zipimport.o 
Modules/symtablemodule.o  Modules/xxsubtype.o
         ranlib libpython2.3.a
          c++ -lpthread -lcl -Wl,-E -Wl,+s -o python \
                         Modules/python.o \
                         libpython2.3.a -lnsl -lrt -ldld    -lm
collect2: ld returned 1 exit status
/usr/ccs/bin/ld: Unsatisfied symbols:
    PyThread_acquire_lock (first referenced in libpython2.3.a(main.o)) 
(code)
    PyThread_exit_thread (first referenced in libpython2.3.a(main.o)) (code)
    PyThread_allocate_lock (first referenced in libpython2.3.a(main.o)) 
(code)
    PyThread_free_lock (first referenced in libpython2.3.a(main.o)) (code)
    PyThread_start_new_thread (first referenced in 
libpython2.3.a(main.o)) (code)
    PyThread_release_lock (first referenced in libpython2.3.a(main.o)) 
(code)
    PyThread_get_thread_ident (first referenced in 
libpython2.3.a(main.o)) (code)
    PyThread__init_thread (first referenced in libpython2.3.a(main.o)) 
(code)
*** Error exit code 1


Thanks,
   Olaf


From missive at frontiernet.net  Thu Jan  8 23:25:55 2004
From: missive at frontiernet.net (Lee Harr)
Date: Fri, 09 Jan 2004 04:25:55 GMT
Subject: Lua: further investigation and comparisons with Python and Forth
References: <mailman.208.1073620471.12720.python-list@python.org>
Message-ID: <slrnbvsbb1.2s7u.missive@homer.easthighschool.net>

> Before reading about Open Firmware, I had assumed that Forth had completely
> dropped out of sight. Anyone else aware of counterexamples?
>

$ uname -a
FreeBSD  4.9-STABLE FreeBSD 4.9-STABLE #1: Sat Dec 27 11:23:38 EST 2003
$ cd /usr/src
$ find . -name "*forth*"
./share/examples/bootforth
./sys/boot/common/interp_forth.c
./sys/boot/forth



From peter at engcorp.com  Wed Jan 28 09:24:48 2004
From: peter at engcorp.com (Peter Hansen)
Date: Wed, 28 Jan 2004 09:24:48 -0500
Subject: package similar to XML::Simple
References: <bv80qq$kbg$1@sunnews.cern.ch>
Message-ID: <4017C630.5A6DD35@engcorp.com>

Paulo Pinto wrote:
> 
> does anyone know of a Python package that
> is able to load XML like the XML::Simple
> Perl package does?
> 
> For those that don't know it, this package
> maps the XML file to a dictionary.

A simple dictionary is insufficient to represent XML in general,
so perhaps you're talking about a subset of XML, maybe with no
attributes, and where the order of the child elements doesn't 
matter?  Or something else?

Or do you really mean something like a multiply-nested
dictionary, perhaps with lists as well?

> Of course I can build such a package myself
> but it would be better if it already exists :)

We were able to build something similar by stripping down 
Fredrik Lundh's elementtree until we had little more than the
calls to the expat parser (i.e. we used his source as a tutorial
on using expat :-), so if this is something like the XML-subset
I mention above, you could do it in an hour or so from scratch
if you knew Python well.

-Peter


From austin at smartobject.biz  Tue Jan  6 10:42:46 2004
From: austin at smartobject.biz (Jess Austin)
Date: 6 Jan 2004 07:42:46 -0800
Subject: [Python-Dev] PEP 324: popen5 - New POSIX process module
References: <Pine.LNX.4.44.0401032302210.778-100000@aristocat.lysator.liu.se>
	<mailman.60.1073175311.12720.python-list@python.org>
Message-ID: <b3ad1da7.0401060742.a194a65@posting.google.com>

Martin, you seem to be quite fond of popen2.

"Martin v. Loewis" <martin at v.loewis.de> wrote in message news:<mailman.60.1073175311.12720.python-list at python.org>...
> So enhance them, instead of replacing them.

and...
> I find that an acceptable incompatibility, and it will likely break
> no existing application. Applications usually expect that the program

and...
> Why is that? Just add a single function, with arguments
> stdin/stdout/stderr. No need for 12 functions. Then explain the existing
> functions in terms of your new function (if possible).

and... 
> You really should work with the existing code base. Ignoring it is a
> guarantee that your PEP will be rejected. (Studying it, and then
> providing educated comments about it, might get you through)

But you're not quite so fond of the people who are using popen2. 
Dumping a bunch of interface changes on them at this late date will
not make users happy.  They worked to get their code functioning with
what you admit is not a perfect module.  Now you suggest breaking all
that installed code the next time a new version comes out?

As someone who has used popen2 and who looks forward to using this new
"process" module, I value user happiness.  This seems to be one of the
many situations in which happiness is highly correlated with choice. 
If I have some old code that works as well as I need it to work with
popen2, I choose to leave it the hell alone, and I appreciate it not
getting broken behind my back.  If I'm writing something new, and I
find the interface offered by "process" more logical, I will choose to
use that.  Further, I will appreciate not having to reacquaint myself
with the numerological arcana of popen2, if only to know what to
ignore while using the new function.  If I have code I could never get
to work properly with popen2 and suddenly "process" becomes available,
I will be only too happy to modify it for use with the new module.  If
I'm an utter newbie who is thinking about processes for the first time
in my life, it doesn't matter where the gurus point me so long as they
point me to something that makes sense.

I admit that I haven't looked at this proposed package at all yet;
I've only read the PEP.  It's quite possible that it doesn't fulfill
all my hopes and dreams, that it won't contribute to my choice and my
happiness.  I note with some trepidation that plans for the Windows
platform aren't fully fleshed out.  But you haven't offered criticism
of the implementation, your objection is that "it's not called
popen2".  I suspect that few people will give that objection much
weight, whether they have used popen2 or not.

"Martin v. Loewis" <martin at v.loewis.de> continues...
> I never said it would be easy. However, introducing a new popen module
> is a major change, and there must be strong indications that the current
> API cannot be enhanced before throwing it away.
> 
> There should be one-- and preferably only one --obvious way to do it.
> 
> As for breaking compatibility: This is what the PEP should study in
> detail. It is sometimes acceptable to break compatibility, if

I think that the PEP contains the "strong indications" you require. 
While it's nice to have "one way" that we can tell newbies, it isn't
mandatory that there be only one way we've ever done it.  That would
inhibit progress.  I support functioning code, and progress in the
directions that users choose.  +1.

later,
Jess


From peter at engcorp.com  Wed Jan 14 11:16:48 2004
From: peter at engcorp.com (Peter Hansen)
Date: Wed, 14 Jan 2004 11:16:48 -0500
Subject: I come not to bury C++, but to praise it...
References: <mailman.337.1074032524.12720.python-list@python.org>
	<40055560.7A0DCD0D@engcorp.com>
	<100aoq8efq3nt1e@corp.supernews.com>
Message-ID: <40056B70.3E04217B@engcorp.com>

Cameron Laird wrote:
> 
> I was still fussing with cfront in the early '90s.
> Its era *had* passed by then, though.

And I actually went looking for it again as recently as two years
ago, considering the possibility of using it to allow the use of
C++ code for a small embedded processor which did not have an 
available C++ compiler.  I actually don't remember precisely why
we didn't try it out, and I assume we simply got distracted by having
to make things work and forgot to continue the search.

Can it be used as a front-end for such chips, where at best there
are two or three C compilers on the market?

-Peter


From mmoum at woh.rr.com  Fri Jan  2 19:21:55 2004
From: mmoum at woh.rr.com (DoubleM)
Date: Sat, 03 Jan 2004 00:21:55 GMT
Subject: Python 2.3.3 compilation problem
References: <fba51ba7.0401012310.599d626d@posting.google.com>
Message-ID: <DWnJb.1946$Dp5.838@fe3.columbus.rr.com>

Zdenda wrote:

> Hi, i have RH9 and i need python 2.3. I executed tgz file and typed
> ./configue. Then i type make. It is without problem. When I type make
> install ... ...
> ...
> Compiling /usr/local/lib/python2.3/xml/sax/handler.py ...
> Compiling /usr/local/lib/python2.3/xml/sax/saxutils.py ...
> Compiling /usr/local/lib/python2.3/xml/sax/xmlreader.py ...
> Compiling /usr/local/lib/python2.3/xmllib.py ...
> Compiling /usr/local/lib/python2.3/xmlrpclib.py ...
> Compiling /usr/local/lib/python2.3/zipfile.py ...
> make: *** [libinstall] Error 1
> 
> Have somebody any idea where is error?
> Thanks
I had the same problem on Mandrake.  There seem to be some minor syntax
incompatibilities in zipfile.py, and others.  Try make -i install, and all
should be fine.

Mike


From vidiv at gmx.net  Sun Jan 25 00:10:54 2004
From: vidiv at gmx.net (vidiv at gmx.net)
Date: Sun, 25 Jan 2004 06:10:54 +0100 (MET)
Subject: Terminal Emulation with IBM ES9672 mainframe via multiplexer.
References: <E1Ags3V-0001ZM-00@ns.purdue.org>
Message-ID: <32215.1075007454@www3.gmx.net>

> >I am a student-newbie to Python-List (for that matter Python language)
> >working on a project for Terminal Emulation. The dumb terminal interacts
> >with an
> >IBM ES9672 mainframe through a 'multiplexer-MUX'. 
> >The s/w is currently running in 'C' on a Windows NT environment and the
> >requirement is to introduce Object Oriented concepts and C++ was the
> obvious
> >choice, but i came across  'Python' (and also Perl, Ruby, ..etc) after i
> >installed RH8 on my PC last month. We are actively canvassing the
> advantages
> >of GNU
> >s/w and philosophy and would like to simultaneously port it to GNU/Linux
> >platform.
> >
> >I have read some of the documentation in Python.
> >Before using Python as our project language it would be useful to know
> >whether Python has functions, libraries/headers (like C does) capable of
> >handling
> >the foll. :
> >
> >1] open and close serial ports,
> >2] set baud rates,
> >3] check parity bit/byte,
> >4] stop bits,
> >5] Hardware handshaking,
> >6] selection of port,......
> >
> >Our existing 'C' code is to be ported to the GNU/Linux platform so we are
> >actively looking at an OOP concept. The part for serial port
> communication
> >in
> >C++ has classes so its easier to write customized programs to do most of
> the
> >above. 
> >
> >Most importantly compatibility issues with the existing Multiplexer and
> >Cisco Routers have to be kept in mind as the company will *not* make any
> H/W
> >changes. 
> >
> >We saw that python has some routines for using existing C code, so we
> dont
> >have to rewrite everything and can make modules containing functions and
> use
> >it to operate on files. 
> >Does it provide any other serial port communication features ?
> >It would be nice if anyone could throw some light on some of the above
> >issues.
> 			.
> 			.
> 			.
> Yes, Python can do all this.
> 
> Although perhaps not as well as other approaches.  I don't understand
> your description.  You have something that "works", now, and you want
> ... well, I'm not sure what you want.  Is the software you're looking
> to change the terminal emulator, or the MUX?  I think it's the former.


+++++++

yes, the goal is to rewrite the existing customised Terminal Emulator using
C++, as OOP is very efficient. Is it better to script an existing application
with Python/Ruby that rewriting 3000+ lines of C code into C++ ?? 

++++++++





> What's the relation of the new software and the software it's
> replacing?  Are they supposed to have the same design?  Would it be
> easier for you to do object-oriented analysis and design, then imple-
> ment in C (while C isn't a particularly inviting language for OO, it
> *is* possible to use it)?  Is the terminal emulator connecting to a
> mainframe, or routers, or both?  Is it enough for you just to exhibit
> one of the many free-software terminal emulators available?  When *I*
> work in this area, I certainly start with as much re-use as possible.
> Is the point of this to construct working software, or learn OO, or
> port to Linux, or ...?  Or all of the above?


++++++

Almost.... but here is more......

Currently the 'C'-program executable's are given to the clients and it
connects geographically scattered Terminals/PCs and/or Printers and behaves like a
dumb terminal emulator (when client uses a dialup to access our Mux) and the
I/O data is captured, sent to (& received from) a Multiplexer
(Mux)----------> on to the CUTS (Connect Unisys Terminal Emulator using U100 protocol) and
---------> on to the SNA for IBM Mainframe in another city. 
Our existing program is limited to sending, receiving data till the Mux. It
has 3000+ lines of C-code in a 'single' file and needs to be modularized.
The exchange of data between a central site host and down lines must be
seamless despite different technologies, platforms, environments and so the
language used to program it must have adequate runtime libraries and routines for
a smooth transition. 

Even though Python has many modules for various functions, i need more info
about the foll.:: 
1] 
If our platform is Gnu/Linux and client uses Windows 98/95 then how can the
application be ported so as to be accessible by him without any compatibility
issues. 
2] 
Does python have windows enabled runtime libraries and routines to glue some
program components. 
3]
Currently client uses DOS terminal mode so will they need a Windows terminal
version of Python interpreter to be installed to run the application or can
it be integrated using some tools (which ones?)? 

It would help to get more information or a pointer to the right direction
and hence i posted a message. 
Regarding using existing free-software terminal emulators available there
are a lot of things to be considered.

Thanks for your time.

-Vidya.

-- 

vidiv AT gmx DOT net


+++ GMX - die erste Adresse f?r Mail, Message, More +++
Bis 31.1.: TopMail + Digicam f?r nur 29 EUR http://www.gmx.net/topmail




From josecarlos at siadv.com  Sun Jan 25 08:31:08 2004
From: josecarlos at siadv.com (José Carlos)
Date: Sun, 25 Jan 2004 14:31:08 +0100
Subject: compress string of data
Message-ID: <bv0gev$2ni$1@nsnmrro2-gest.nuria.telefonica-data.net>

Hi.

How i could compress string of data?.

I heart that it?s possible to make with librep, but i?dont know the way to
do it.

if somebody know any way to do it or any web where explain it i would thank
the help.

Regards.

Jos? Carlos
ADV
www.siadv.com




From roy at panix.com  Mon Jan 12 20:02:25 2004
From: roy at panix.com (Roy Smith)
Date: Mon, 12 Jan 2004 20:02:25 -0500
Subject: Python is far from a top performer according to benchmarktest...
References: <ZGsHWLAELyAAFw4h@jessikat.fsnet.co.uk>
	<mailman.310.1073949030.12720.python-list@python.org>
	<WgRkPUAyD0AAFwa2@jessikat.fsnet.co.uk>
Message-ID: <roy-6D887D.20022512012004@reader2.panix.com>

Robin Becker <robin at jessikat.fsnet.co.uk> wrote:
> -Common blocks are an invention of the Devil-ly yrs- 

There's no evil you can commit in FORTRAN with common blocks that you 
can't do just as well in C with globals and pointers.


From dwelch at localhost.localdomain  Thu Jan  8 18:01:13 2004
From: dwelch at localhost.localdomain (d)
Date: Thu, 08 Jan 2004 23:01:13 GMT
Subject: python newbie
References: <3ffddcfd$0$16662$ba620e4c@news.skynet.be>
	<5unrvv8u1vpske1j464epj4aff0f54k2nf@4ax.com>
Message-ID: <UilLb.1570$nt4.1692@attbi_s51>

Rene Pijlman wrote:

> broebel:
>>first problem is the fact that I started out with a little program who was
>>part of a course but the problem is when I launch the program. I don't
>>have the time to see the result because the screen closes immediately.
>>Can anyone explain what's happening.
> 
> The program started, did what it had to do and then terminated :-)
> 
> "1   How do I run a Python program under Windows?"
>
http://www.python.org/doc/faq/windows.html#how-do-i-run-a-python-program-under-windows
>
Worked fine for me on Linux... made two suggested changes: 1) use
raw_input(), not input(), 2) check user input for errors. Sorry, I don't
know how to say "Enter a number between 0 and 500" in whatever language
this is in (German?)

 
#!/usr/bin/env python
while 1:
    bedrag = raw_input ( 'Geef bedrag tussen 0 en 500 eurocent: ' )
    try:
        bedrag = int( bedrag )
    except ValueError:
        print "Enter a number between 0 and 500"
    else:
        if bedrag < 0 or bedrag > 500:
            print "Enter a number between 0 and 500"
        else:
            break
    

for munt in 200, 100, 50, 20, 10, 5, 2, 1 :
    aantal = 0

    while bedrag >= munt :
        aantal = aantal + 1
        bedrag = bedrag - munt

    if aantal > 0 :
        print aantal, 'x', munt
-- 
/d/


From mark at mceahern.com  Wed Jan 14 23:01:46 2004
From: mark at mceahern.com (Mark McEahern)
Date: Wed, 14 Jan 2004 22:01:46 -0600
Subject: Deleting objects
In-Reply-To: <c542f8acd755de732c9da8fc39fbb50a@news.teranews.com>
References: <c542f8acd755de732c9da8fc39fbb50a@news.teranews.com>
Message-ID: <1074139306.26201.19.camel@dev.internal>

On Wed, 2004-01-14 at 17:23, user at domain.invalid wrote:
> Say I have an object (foo), that contains an
> array (bar) of references to other objects.
> 
> Now I want to puff some of the objects from the
> array so that I remove the array element, and
> destroy the oject.

> but when I do:
> 
> del foo.bar[0]
> 
> Python says:
>   object doesn't support item deletion

It'd be helpful if you supplied the code in question.  Then again, we
wouldn't be able to let our imagination wander with what puff might
mean.  <wink>

Anyway, is this the sort of thing you're talking about?

#!/usr/bin/env python

class Foo:

    def __init__(self):
        self.bar = []

    def __str__(self):
        return '<Foo><bar>%s</bar></Foo>' % (str(self.bar),)

l = range(10)

foo = Foo()
foo.bar.append(l)
del foo.bar[0]
print 'foo = %s' % (str(foo),)
print 'l = %s' % (l,)

Cheers,

// m




From roman.yakovenko at actimize.com  Mon Jan 12 03:06:38 2004
From: roman.yakovenko at actimize.com (Roman Yakovenko)
Date: Mon, 12 Jan 2004 10:06:38 +0200
Subject: __slots__, setattr, __metaclass__
Message-ID: <2CD84621099A814598AE3EFEFB5C1421046D2D@exchange.adrembi.com>

	Hi. I have small problem and I don't know solution.
The problem: every class imported from some module X should not allow to be modified
( modified == adding or deleting new class attributes ). 
Small explanation about what I am doing: I has complex dll written in Managed C++ for C#.
I am using "Python for .NET" and python unittest module to test my dll. 
I find myself often make a mistake in attributes names. I'd like to protect my self from those errors.
In subject I listed available options, but I don't know which one to pick and how to use it in my situation.

As you can guess I can't to modify Managed C++ sources.

Thanks. Roman.




From bdelmee at advalvas.REMOVEME.be  Thu Jan  8 17:41:15 2004
From: bdelmee at advalvas.REMOVEME.be (=?ISO-8859-1?Q?Bernard_Delm=E9e?=)
Date: Thu, 08 Jan 2004 23:41:15 +0100
Subject: Looking for help with regular expressions- not Python Specific
In-Reply-To: <Xns946AA1FF3A7CAdkwwashere@216.168.3.30>
References: <8d3e714e.0401072114.5bf3fba7@posting.google.com>
	<roy-796F67.09245808012004@reader2.panix.com>
	<Xns946AA1FF3A7CAdkwwashere@216.168.3.30>
Message-ID: <3ffddc8b$0$1110$6c56d894@feed0.news.be.easynet.net>

You might find the redemo.py script real handy when investigating
regexes. It should live in the Tools subdirectory of your python
install (and requires tkinter).



From bug-gswin-bounces at ghostscript.com  Thu Jan 29 16:31:57 2004
From: bug-gswin-bounces at ghostscript.com (bug-gswin-bounces at ghostscript.com)
Date: Thu, 29 Jan 2004 13:31:57 -0800
Subject: Your message to bug-gswin awaits moderator approval
Message-ID: <mailman.414.1075411917.21873.bug-gswin@ghostscript.com>

Your mail to 'bug-gswin' with the subject

    Rcypwodky

Is being held until the list moderator can review it for approval.

The reason it is being held:

    Post by non-member to a members-only list

Either the message will get posted to the list, or you will receive
notification of the moderator's decision.  If you would like to cancel
this posting, please visit the following URL:

    http://www.ghostscript.com/mailman/confirm/bug-gswin/5f6df4615a4eb2c1cee1818df208649184a3bbee




From eppstein at ics.uci.edu  Thu Jan 22 15:09:16 2004
From: eppstein at ics.uci.edu (David Eppstein)
Date: Thu, 22 Jan 2004 12:09:16 -0800
Subject: What is object()
References: <mailman.655.1074790103.12720.python-list@python.org>
	<bup01m$hjm$1@panix1.panix.com>
Message-ID: <eppstein-960E9C.12091622012004@news.service.uci.edu>

In article <bup01m$hjm$1 at panix1.panix.com>, aahz at pythoncraft.com (Aahz) 
wrote:

> >  i was reading library refrence manual. there i found
> >object() function. they says in library refrence that 
> >        "Return a new featureless object. object() is
> >a base for all new style classes. It has the methods
> >that are common to all instances of new style
> >classes." 
> 
> There's not much use for an instance of object.  Don't worry about it.

It can be useful when you want something that is guaranteed to be 
different from all other objects and has no other purpose than existing 
and being different.

Beyond that somewhat specialized use, object exists to be subclassed, 
not instantiated directly.

-- 
David Eppstein                      http://www.ics.uci.edu/~eppstein/
Univ. of California, Irvine, School of Information & Computer Science


From sross at connectmail.carleton.ca  Fri Jan 30 12:00:52 2004
From: sross at connectmail.carleton.ca (Sean Ross)
Date: Fri, 30 Jan 2004 12:00:52 -0500
Subject: Python vs. Io
References: <711c7390.0401291301.3f95794@posting.google.com>
Message-ID: <D6wSb.6538$qU3.576425@news20.bellglobal.com>

Hi.
I took a look at Io because of your post, and I have a question:

Are there prototype(?) _and_ instance methods/slots?

In other words, is there a shared state mechanism between instances of a
prototype?
If so, could you show an example.

Thanks,
Sean




From michael at foord.net  Thu Jan 29 03:18:44 2004
From: michael at foord.net (Fuzzyman)
Date: 29 Jan 2004 00:18:44 -0800
Subject: Webhosting with Python
References: <8089854e.0401280834.6fd4f972@posting.google.com>
	<bv8pch$2lhu$1@bigboote.WPI.EDU>
	<bv95mg$p1de8$1@ID-62387.news.uni-berlin.de>
Message-ID: <8089854e.0401290018.4b07ffbf@posting.google.com>

"val" <val at vtek.com> wrote in message news:<bv95mg$p1de8$1 at ID-62387.news.uni-berlin.de>...
> Sorry,
>     i didn't find any mention of Python.
>     Can you please point me in right direction?
> val
> val at vtek dot com
> 


It's definitely got python on - I was pointed to this host from
another list that had python on the list.... I can't see it advertised
by Xennos - but I have scripts up and running - e.g.
http://www.voidspace.xennos.com/cgi-bin/cginews.py

One of the error messages I got told me it was Python 2.2........

Fuzzy 

> "Kevin Ballard" <kevin at sb.org> wrote in message
> news:bv8pch$2lhu$1 at bigboote.WPI.EDU...
> > On 2004-01-28 11:34:43 -0500, michael at foord.net (Fuzzyman) said:
> >
> > > I've recently starting using a very cheap web hoster who has python
> > > 2.2 installed.... almost free hosting (but not quite).....
> > >
> > > Thought some of you guys might be interested..........
> > >
> > > http://www.xennos.com
> > >
> > > Fuzzyman
> >
> > How do you plan to make money off of this?


From paul at fxtech.com  Tue Jan 27 11:56:47 2004
From: paul at fxtech.com (paul at fxtech.com)
Date: Tue, 27 Jan 2004 11:56:47 -0500 (EST)
Subject: os.path.split: processing paths from one OS on another
In-Reply-To: <e55d10tko591ijfftcjufsa8tfpvm4lvqj@4ax.com>
References: <401691D7.8050607@holmes.nl>
	<e55d10tko591ijfftcjufsa8tfpvm4lvqj@4ax.com>
Message-ID: <8161.195.173.15.12.1075222607.squirrel@webmail.pair.com>

> Windows itself is happy using forward slashes as a directory separator,
> so your client can use them throughout.  It's only the Windows shell
> that requires backslash rather than forward slash.

Which is a wonderful reason to use cygwin!







From candiazoo at comcast.net  Fri Jan  2 14:24:20 2004
From: candiazoo at comcast.net (Zoo Keeper)
Date: Fri, 02 Jan 2004 19:24:20 GMT
Subject: Problem building on BeOS...
References: <NLhJb.31440$I07.78784@attbi_s53>
	<BvjJb.717712$HS4.5166026@attbi_s01>
Message-ID: <EzjJb.196235$8y1.643453@attbi_s52>

Belay that.

In message <BvjJb.717712$HS4.5166026 at attbi_s01>, Zoo Keeper wrote:
> O.K!  After some tips from you folks, I found that the problem ONLY occurs
> with
> line continuation in "extern" statements.  Works fine for DEFINEs...
> 
> Mike
> 
> In message <NLhJb.31440$I07.78784 at attbi_s53>, Zoo Keeper wrote:
> > For some reason, the Python preprocessing balks on the "\" line
> continuation
> > character.  Any ideas/thoughts?  Is it just that my version of gcc is not
> > supported?
> > 
> > I don't "need" numeric in my current project, but it is a nice package to
> > have!
> >  Apps that do not need to be compiled install and run fine.  Actually,
> > SQLite
> > built and installed fine...
> > 
> > Thanks, in advance.
> > 
> > Mike
> > 
> > Python 2.2.2 (#13, Dec  6 2002, 00:42:47)
> > [GCC 2.9-beos-991026] on beos5
> > 
> > $ python setup.py build
> > running build
> > running build_py
> > not copying Lib/ArrayPrinter.py (output up-to-date)
> > not copying Lib/LinearAlgebra.py (output up-to-date)
> > not copying Lib/MLab.py (output up-to-date)
> > not copying Lib/Matrix.py (output up-to-date)
> > not copying Lib/Numeric.py (output up-to-date)
> > not copying Lib/Precision.py (output up-to-date)
> > not copying Lib/RandomArray.py (output up-to-date)
> > not copying Lib/UserArray.py (output up-to-date)
> > not copying Lib/numeric_version.py (output up-to-date)
> > not copying Packages/FFT/Lib/FFT.py (output up-to-date)
> > not copying Packages/FFT/Lib/__init__.py (output up-to-date)
> > not copying Packages/MA/Lib/MA.py (output up-to-date)
> > not copying Packages/MA/Lib/MA_version.py (output up-to-date)
> > not copying Packages/MA/Lib/__init__.py (output up-to-date)
> > not copying Packages/RNG/Lib/Statistics.py (output up-to-date)
> > not copying Packages/RNG/Lib/__init__.py (output up-to-date)
> > running build_ext
> > building '_numpy' extension
> > gcc -DNDEBUG -O -IInclude -IPackages/FFT/Include -IPackages/RNG/Include
> > -I/boot/home/config/include/python2.2 -c Src/_numpymodule.c -o
> > build/temp.beos-5.0.4-BePC-2.2/_numpymodule.o
> > In file included from
> > /boot/home/Downloads/Numeric-23.1/Src/_numpymodule.c:4:
> > /boot/home/Downloads/Numeric-23.1/Include/Numeric/arrayobject.h:234: stray
> > '\'
> > in program
> > /boot/home/Downloads/Numeric-23.1/Include/Numeric/arrayobject.h:239: stray
> > '\'
> > in program
> > /boot/home/Downloads/Numeric-23.1/Include/Numeric/arrayobject.h:241: stray
> > '\'
> > in program
> > /boot/home/Downloads/Numeric-23.1/Include/Numeric/arrayobject.h:244: stray
> > '\'
> > in program
> > /boot/home/Downloads/Numeric-23.1/Include/Numeric/arrayobject.h:247: stray
> > '\'
> > in program
> > /boot/home/Downloads/Numeric-23.1/Include/Numeric/arrayobject.h:251: stray
> > '\'
> > in program
> > /boot/home/Downloads/Numeric-23.1/Include/Numeric/arrayobject.h:253: stray
> > '\'
> > in program
> > /boot/home/Downloads/Numeric-23.1/Include/Numeric/arrayobject.h:255: stray
> > '\'
> > in program
> > /boot/home/Downloads/Numeric-23.1/Include/Numeric/arrayobject.h:257: stray
> > '\'
> > in program
> > In file included from
> > /boot/home/Downloads/Numeric-23.1/Src/_numpymodule.c:6:
> > /boot/home/Downloads/Numeric-23.1/Include/Numeric/ufuncobject.h:101: stray
> > '\'
> > in program
> > /boot/home/Downloads/Numeric-23.1/Include/Numeric/ufuncobject.h:103: stray
> > '\'
> > in program
> > error: command 'gcc' failed with exit status 1
> > $  
> > 
> 
> 




From ptmcg at users.sourceforge.net  Thu Jan  8 22:43:29 2004
From: ptmcg at users.sourceforge.net (Paul McGuire)
Date: Fri, 09 Jan 2004 03:43:29 GMT
Subject: ANN: pyparsing 1.0.4 released
Message-ID: <BrpLb.8420$1F4.3319@fe2.texas.rr.com>

pyparsing version 1.0.4 is available at
http://sourceforge.net/projects/pyparsing/.

Version 1.0.4 contains:
- more performance improvements (another 30-40% reduction)
- positional token expressions (StringStart, StringEnd, LineStart, LineEnd)
- commaDelimitedList convenience built-in
- more example scripts (HTTP server log parser, comma separated list parser)
- fixed typo in setup.py

- minor API change: delimitedList no longer groups the results, this is now
the responsibility of the caller (using Group(delimitedList(expr)))





From exarkun at intarweb.us  Mon Jan 19 08:40:51 2004
From: exarkun at intarweb.us (Jp Calderone)
Date: Mon, 19 Jan 2004 08:40:51 -0500
Subject: overwrite private method... (of wxColumnSorterMixin class)
In-Reply-To: <bugkcm$gtquu$1@ID-221199.news.uni-berlin.de>
References: <bugj2p$vqj$1@nebula.dnttm.ro>
	<bugkcm$gtquu$1@ID-221199.news.uni-berlin.de>
Message-ID: <20040119134051.GA2764@intarweb.us>

On Mon, Jan 19, 2004 at 05:00:03AM -0800, Zachary wrote:
> 
> "Florian Preknya" <bolo at coco.ro> wrote in message
> news:bugj2p$vqj$1 at nebula.dnttm.ro...
> > Is there a posibility to overwrite a private method (one that starts with
> > __ ) ? I read that they are just formely private, they are prefixed with
> the
> > class name to have an obtured visibility, so maybe it's a trick here...
> >
> > More details...
> > I use wxPython, more specifically the wxColumnSorterMixin class. I want to
> > overwrite the __OnColClick event handler to behave on my way: I want the
> > sorting feature will affect only some columns, not all columns and that
> > event handler is the key. The problem is that the event chain is skiped in
> > the __OnColClick method, so I cannot receive the event anymore. So, my
> idea
> > was to overwrite the __OnColClick method in the mixin subclass. Is this
> > possible? Or, are they other solutions for this ?
> >
> > Thanks,
> > Florian.
> >
> >
> What you read is true, so far as I know.  It is possible to override them,
> as Python doesn't have a notion of encapsulation, again, as far as I know.
> You can probably get away with this.
> 

  Encapsulation is not the same thing as data hiding or private
attributes/methods.  Python does not have private attributes or methods, so
this is possible.  Python *does* support the concept of encapsulation, but
that is mostly unrelated to the question at hand.

    class CustomColumnSorter(wxColumnSorterMixin):
        def _wxColumnSorterMixin__OnColClick(...):
            ...

  Assuming wxColumnSorterMixin is subclassable, this will work.  It may not
be, though.  There is also probably a better way to achieve the results
you're looking for.  Perhaps by specifying a callback in some other way,
such as binding a handler to an event.

  Jp



From jarrodhroberson at yahoo.com  Mon Jan 12 00:08:55 2004
From: jarrodhroberson at yahoo.com (Y2KYZFR1)
Date: 11 Jan 2004 21:08:55 -0800
Subject: Python installation breaks Outlook Express
References: <ikn30011doe8o972u0d67j1dvrjs2si1v8@4ax.com>
Message-ID: <c718a6cf.0401112108.66968e7a@posting.google.com>

M. Laymon <mxlaym009 at hotmail.com> wrote in message news:<ikn30011doe8o972u0d67j1dvrjs2si1v8 at 4ax.com>...
> I just installed Python 2.3.3 under Windows XP professional.   After I
> did, my wife tried to access her email using Outlook Express and got
> the error messages:
> 
> Your server has unexpectedly terminated the connection. Possible
> causes for 
> this include server problems, network problems, or a long period of
> inactivity. 
> Account: 'incoming.verizon.net', Server: 'outgoing.verizon.net', 
> Protocol: SMTP, Port: 25, Secure(SSL): No, Error Number: 0x800CCC0F
> 
> Your server has unexpectedly terminated the connection. Possible
> causes for this 
> include server problems, network problems, or a long period of
> inactivity. 
> Account: 'incoming.verizon.net', Server: 'incoming.verizon.net',
> Protocol: POP3, 
> Port: 110, Secure(SSL): No, Error Number: 0x800CCC0F
> 
>  (No comments about Outlook, please.I have tried to get her to use a
> different email program, but she likes Outlook.)   I checked the
> settings, then recreated her account in Outlook, but nothing worked.
> My Mozilla Thunderbird email client worked fine.
> 
> Since the only thing I had done recently was to install Python.  I
> used system restore to go back to the point before installing Python.
> After I did, Outlook started working again.  Has anyone else seen this
> behavior ?
> 
> Thanks.
> 
> M. Laymon

This has nothing to do with Python and posting the same question over
and over will not get a different answer.


From dman at dman13.dyndns.org  Tue Jan  6 18:50:02 2004
From: dman at dman13.dyndns.org (Derrick 'dman' Hudson)
Date: Tue, 06 Jan 2004 23:50:02 GMT
Subject: Iterating over a binary file
References: <btf5j8$6g26f$1@ID-46268.news.uni-berlin.de>
	<7xznd04ww1.fsf@ruckus.brouhaha.com>
	<du7ptdwsq1t.fsf@lehtori.cc.tut.fi>
Message-ID: <92urc1-92u.ln1@dman13.dyndns.org>

On 06 Jan 2004 23:52:30 +0200, Ville Vainio wrote:
> Paul Rubin <http://phr.cx at NOSPAM.invalid> writes:

>> There's been proposals around to add an assignment-expression operator
>> like in C, so you could say something like

> It's funny, but I find the first version much more readable than the
> second one. Especially if I consciously forget the "do lots of stuff
> in condition part of while" indoctrination from C.

>> but that's the subject of holy war around here too many times ;-).  Don't
>> hold your breath waiting for it.
> 
> Probably true. Instead of ":=", I wouldn't mind getting rid of
> expressions/statements difference as a whole.

Uh-oh.  Don't go there.  If there was no difference, then you would be
able to perform assignment, even define a class, in the condition of a
while.  I don't think you want that based on what you said above.  (I
certainly don't want to have to read code with such complexity!)

-D

-- 
For society, it's probably a good thing that engineers value function
over appearance.  For example, you wouldn't want engineers to build
nuclear power plants that only _look_ like they would keep all the
radiation inside.
    (Scott Adams - The Dilbert principle)
 
www: http://dman13.dyndns.org/~dman/            jabber: dman at dman13.dyndns.org


From HAALrvanderhWEG at xs4all.nl  Thu Jan 22 09:39:47 2004
From: HAALrvanderhWEG at xs4all.nl (Rik van der Helm)
Date: Thu, 22 Jan 2004 15:39:47 +0100
Subject: newbie,cgi,os.system,cdrecord
Message-ID: <400fe08c$0$326$e4fe514c@news.xs4all.nl>

Hello,

I am trying to make a backupscript in python, which I want to manage via a 
webform (cgi). In my script I use os.system to execute the following 
shellscript:
"cdrecord -s -dev=0,1,0 -blank=fast -speed=2 fs=8m file.tgz"

When I execute the pythonscript in the shell, it gets executed well and I 
get some output from cdrecord. Which I don't understand because I put 
cdrecord at silent (-s !) I thought.

When I execute the pythonscript in a webbrowser via cgi, cdrecord also gets 
executed well but I get an 'Internal Server Error' of Python and in 
'/var/log/httpd/error_log' it says:
"malformed header from script. Bad header=Cdrecord 1.11a19 etc....."

I think I understand what is going wrong. Apache tries to print the output 
of cdrecord and finds something wrong and stops executing the script. Is 
this correct ? If this is correct how do I get cdrecord stop making output 
texts ?

All suggestions are welcome

Thanks, Rik




From qual at tiscali.de  Fri Jan  2 12:31:28 2004
From: qual at tiscali.de (Uwe Hoffmann)
Date: Fri, 02 Jan 2004 18:31:28 +0100
Subject: Problem building on BeOS...
In-Reply-To: <NLhJb.31440$I07.78784@attbi_s53>
References: <NLhJb.31440$I07.78784@attbi_s53>
Message-ID: <bt4a9t$13e4$1@ulysses.news.tiscali.de>

Zoo Keeper wrote:
> For some reason, the Python preprocessing balks on the "\" line continuation
> character.  Any ideas/thoughts?  Is it just that my version of gcc is not
> supported?

> In file included from /boot/home/Downloads/Numeric-23.1/Src/_numpymodule.c:4:
> /boot/home/Downloads/Numeric-23.1/Include/Numeric/arrayobject.h:234: stray '\'
> in program

no knowledge of beos, but maybe your files have the "wrong" line ending
(e.g. \r\n instead of \n or something like that)



From cookedm+news at physics.mcmaster.ca  Mon Jan 12 10:27:38 2004
From: cookedm+news at physics.mcmaster.ca (David M. Cooke)
Date: Mon, 12 Jan 2004 10:27:38 -0500
Subject: building strings with variable input
References: <pduMb.6321$g4.137247@news2.nokia.com>
	<400273B8.E991F41D@alcyone.com>
Message-ID: <qnkd69pp4ph.fsf@arbutus.physics.mcmaster.ca>

At some point, Erik Max Francis <max at alcyone.com> wrote:

> Olaf Meyer wrote:
>
>> Especially if you have a lot of variable input it makes it hard to
>> match
>> the variables to the proper fields. From other scripting languanges
>> I'm
>> used to something like:
>> 
>>   $cmd = "$executable -start $startTime -end $endTime -dir $directory"
>> 
>> This makes it very easy to see how the string is actually built. You
>> dont't have to worry where which variables go.
>> 
>> Is there a similar way to do this in python?
>
> Sure:
>
> cmd = "%(executable)s -start %(startTime)s -end %(endTime)s -dir
> %(directory)s" % locals()
>
> There are also more expansive solutions such as YAPTU or EmPy.
>
> Note, however, that what you are trying to do (presuming you're passing
> this to os.system or something similar) is potentially a serious
> security risk.  If the values of the strings you are constructing the
> command line are not fully trustworthy, they can be easily manipulated
> to make your program execute arbitrary shell commands.

In which case he's probably better off with his original format (almost):

cmd = '"$executable" -start "$startTime" -end "$endTime" -dir "$directory"'
os.environ['executable'] = 'blah'
os.environ['startTime'] = '12'
os.environ['endTime'] = '18'
os.environ['directory'] = './'
os.system(cmd)

This way, the shell handles all the quoting. You can do
del os.environ['executable']
afterwards to clean up. I got this technique from
http://freshmeat.net/articles/view/337/

For the quoting, compare:
>>> os.environ['string'] = "`uname` $TERM"
>>> os.system('echo "$string"')
`uname` $PATH
(this is what we want: don't run arbitrary commands or expand
environment variables given in a user string)

with
>>> string = "`uname` $TERM"
>>> os.system('echo "%s"' % string)
Linux xterm
(whoops, security leak)

-- 
|>|\/|<
/--------------------------------------------------------------------------\
|David M. Cooke
|cookedm(at)physics(dot)mcmaster(dot)ca


From jjl at pobox.com  Sat Jan 24 10:25:24 2004
From: jjl at pobox.com (John J. Lee)
Date: 24 Jan 2004 15:25:24 +0000
Subject: Perl vs. Python for text manipulation
References: <69A0D4AB81C51447AD6BA387782B8D64093D8A@midl-mail4.etcconnect.com>
	<028FD9F0-4E01-11D8-BB78-0003934ACDEC@zdome.net>
	<mailman.720.1074906442.12720.python-list@python.org>
	<1013o27e3nb141@corp.supernews.com>
	<ouhdyloduy.fsf@andlx-anamika.cisco.com>
Message-ID: <871xpp1i8r.fsf@pobox.com>

Ganesan R <rganesan at myrealbox.com> writes:

> > Is that all that people mean, though, when they talk about Perl's
> > superiority for text mangling?  Is there more to it?  --
[...]
> The perl "built-in" idioms for text processing is not only a syntactic
> convenience, there are real performance advantages. For example a simple
> perl loop like
> 
> while (<>) { }
> 
> is nearly 6 times slower in python (8 time slower with Python 2.2) using
[...]

Did you try 'for line in file:'?  ISTR Tim Peters optimized that (or
was that fileinput?), precisely because of every hacker and their dog
running this as a benchmark.


John


From jcarlson at nospam.uci.edu  Fri Jan 23 14:48:52 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Fri, 23 Jan 2004 11:48:52 -0800
Subject: I support PEP 326
In-Reply-To: <pTTEAls/KjvU089yn@the-wire.com>
References: <mailman.654.1074788734.12720.python-list@python.org>
	<401081A1.E4C34F00@alcyone.com>
	<qnky8rzid3y.fsf@arbutus.physics.mcmaster.ca>
	<buq4ap$fsb$1@news.service.uci.edu>
	<pTTEAls/KjvU089yn@the-wire.com>
Message-ID: <burtv1$t7d$1@news.service.uci.edu>

Mel Wilson wrote:
> In article <buq4ap$fsb$1 at news.service.uci.edu>,
> Josiah Carlson <jcarlson at nospam.uci.edu> wrote:
> 
>>>Or, expressing the idea that they're the ends of a number line:
>>>
>>>PosInf, NegInf
>>>PosInfinity, NegInfinity
>>>PositiveInfinity, NegativeInfinity
> 
> 
> Highest and Lowest?
> 
>         Regards.        Mel.

That was a suggestion, as was High and Low.  I removed potential 
locations because it detracts from the main focus of the PEP, the 
existance of the objects.
  - Josiah


From tjreedy at udel.edu  Mon Jan 26 16:55:06 2004
From: tjreedy at udel.edu (Terry Reedy)
Date: Mon, 26 Jan 2004 16:55:06 -0500
Subject: raw_input - why doesn't prompt go to stderr
References: <bv2smu$leh$1@nets3.rz.RWTH-Aachen.DE>
Message-ID: <bv42bb$g0n$1@sea.gmane.org>


"Helmut Jarausch" <jarausch-remove at igpm.rwth-aachen.de> wrote in message
news:bv2smu$leh$1 at nets3.rz.RWTH-Aachen.DE...

> when using an interactive Python script, I'd like the prompt given by
> raw_input to go to stderr since stdout is redirected to a file.

This is not the usual behavior, so I presume that you or the code author
(if not the same) have done some non-standard redirection.

> How can I change this

If you wrote or have access to the code, write your own (two-line?) version
of raw_input(prompt) using stderror.write(prompt) and return stdin.read().

Or leave stdout alone and use print >> ofile or ofile.write() for the other
stuff.  Ofile can easily be selectable as either stdout or something else.

If you don't have the source, make suggestions to the owner/author.

> (and suggest making this the default behaviour)

You just did, but part of the definition of 'interactive' is stdout to the
screen or other humanly immediately readable output device ;-)

Terry J. Reedy






From godoy at ieee.org  Thu Jan  1 08:41:10 2004
From: godoy at ieee.org (Jorge Godoy)
Date: Thu, 01 Jan 2004 11:41:10 -0200
Subject: Graph in wxPython
References: <bt04a4$2e3$1@news.Stanford.EDU>
Message-ID: <nkkdc1-lt4.ln1@wintermute.g2ctech>

On Thursday 01 January 2004 01:31 Oh Kyu Yoon wrote in
<bt04a4$2e3$1 at news.Stanford.EDU>:

> Does anyone know how to implement plots from scipy, chaco, etc
> into wxPython widget?

Hi.

I'm doing some research on the same subject and I found out that
Matplotlib seems to be very interesting. Go to
http://matplotlib.sourceforge.net/ and take a look by yourself.


Be seeing you,
-- 
Godoy.     <godoy at ieee.org>


From tzot at sil-tec.gr  Thu Jan  8 12:12:51 2004
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Thu, 08 Jan 2004 19:12:51 +0200
Subject: Code Objects / Variable Names
References: <f8dfa927.0401070051.39cded0c@posting.google.com>
Message-ID: <mn3rvvkfhk74gov0epbstv07e0ke071c3a@4ax.com>

On 7 Jan 2004 00:51:45 -0800, rumours say that drfransch at netscape.net
(F. Schaefer) might have written:

>For the following (compiled) condition 
>
>          (door == "ajar"   and   alternator == "off") || time > 25
>
>  I need to extract, that the variables 'door', 'alternator' and 'time'
>  are involved.

I believe that the solution that Francis and Andrew proposed is the most
suitable for your case.  There is another one, however, that *might* be
useful sometime: use the eval(your_code, globals, locals) form, and
catch the NameError exceptions.
-- 
TZOTZIOY, I speak England very best,
Ils sont fous ces Redmontains! --Harddix


From grey at despair.dmiyu.org  Tue Jan 20 21:02:01 2004
From: grey at despair.dmiyu.org (Steve Lamb)
Date: Wed, 21 Jan 2004 02:02:01 -0000
Subject: regular expression question
References: <slrnc0rifk.d0s.grey@dmiyu.org>
	<slrnc0rj7a.mg5.bignose-hates-spam@iris.polar.local>
Message-ID: <slrnc0rncp.fej.grey@dmiyu.org>

On 2004-01-21, Ben Finney <bignose-hates-spam at and-benfinney-does-too.id.au>
wrote:
> On Wed, 21 Jan 2004 00:38:12 -0000, Steve Lamb wrote:
>> import re line = 'match this' foo = re.search(r'.*(this)', line)
>> foo.groups()[0]

>     >>> import re line = 'match this' foo = re.search( r'.*(this)', line )
>     >>> foo.groups()
>     ('this',)
>     >>> foo.group(0)
>     'match this'
>     >>> foo.group(1)
>     'this'

> Read more on the methods available from a MatchObject:

    Fsck.  Of course the groups are numbered from 1 but if one goes by the
tuple returned they are numbered from 0.  That was my mistake.  Thanks for
pointing it out to me.  :P

-- 
         Steve C. Lamb         | I'm your priest, I'm your shrink, I'm your
       PGP Key: 8B6E99C5       | main connection to the switchboard of souls.
-------------------------------+---------------------------------------------


From james at logicalprogression.net  Wed Jan 21 11:27:55 2004
From: james at logicalprogression.net (James Henderson)
Date: Wed, 21 Jan 2004 16:27:55 +0000
Subject: problems iterating over a files lines
In-Reply-To: <2835a96b.0401210800.4b89d878@posting.google.com>
References: <2835a96b.0401210800.4b89d878@posting.google.com>
Message-ID: <200401211627.55109.james@logicalprogression.net>

On Wednesday 21 January 2004 4:00 pm, Jesse Noller wrote:
> I am a relative newbie to python and I am having issues trying to
> iterate over the lines of a file.
>
> I have a text file - foo.bar inside of this file are lines of text:
>
> x-3411342
> y-1324123
> w-2314121
>
> Each with a trailing \n to designate the end of the line.
>
> I am trying to read this file into python - which is simply in and of
> itself, however:
>
> file = open("foo.bar", "rb")
> while 1:
>     lines = file.open().split('\n'):
>     if not lines:
>            break
>     for lines in lines:
>            key = line
>            get.key(key)
>            results = [key, get.up, get.down]
> file.close()
>
> Appends an extra "blank" line to the list of lines, which causes the
> program to crash - secondly, I've looked at about 20 examples, and all
> of them (including this one) suffer from the problem of looping over
> the lines for the number of lines.
>
> What I want to do is open the contents of the file - read the line and
> set a variable - key, and for each line in the file, I want to do
> something with that key - but only once. So I want to read in a line,
> set to a variable, do something, print, and then do it for the next
> line.

First I take it:

>     lines = file.open().split('\n'):

should have been:

>     lines = file.read().split('\n'):

If you used file.read().splitlines() instead you would avoid the extra blank 
line.

A much better way to iterate line-by-line through the list is simply:

for line in file("foo.bar", "rb"):
    # do something to line

(I'm using the built-in file() function - strictly type - which is the new 
name for open().)

I don't know where your "get" comes from so I can't help you with the rest.

James
-- 
James Henderson, Logical Progression Ltd.
http://www.logicalprogression.net/
http://sourceforge.net/projects/mailmanager/




From whiteywidow at yahoo.com  Wed Jan 21 14:54:07 2004
From: whiteywidow at yahoo.com (rt lange)
Date: 21 Jan 2004 11:54:07 -0800
Subject: Jython and SciTE
Message-ID: <b771ffdd.0401211154.7194f8df@posting.google.com>

I'm trying to get SciTE to run and compile my jython scripts.
This is what I have in my python.properties file:

command.name.1.*.py=Go Jython
command.1.*.py=jython $(FileNameExt)
command.1.subsystem.*.py=1
command.name.2.*.py=Jython -> jar
command.2.*.py=jythonc --core --jar $(FileName).jar $(FileNameExt)
command.2.subsystem.*.py=1

I keep getting as output:

>jython DiceRoll.py
>The system cannot find the file specified.

>jythonc --core --jar DiceRoll.jar DiceRoll.py
>The system cannot find the file specified.

It works fine from the command line (PATH is set correctly.)


From http  Sun Jan 18 18:08:03 2004
From: http (Paul Rubin)
Date: 18 Jan 2004 15:08:03 -0800
Subject: re question - finiding matching ()
References: <4f0a9fdb.0401180751.4b66d974@posting.google.com>
Message-ID: <7xr7xwyhws.fsf@ruckus.brouhaha.com>

miki.tebeka at zoran.com (Miki Tebeka) writes:
> I'd like to find all of the sub strings in the form "add(.*)"
> The catch is that I might have () in the string (e.g. "add((2 * 2), 100)"), 

You can't do that with classic regexps.  You need a parser, not a scanner.


From http  Thu Jan  8 23:15:40 2004
From: http (Paul Rubin)
Date: 08 Jan 2004 20:15:40 -0800
Subject: Lua: further investigation and comparisons with Python and Forth
References: <mailman.208.1073620471.12720.python-list@python.org>
Message-ID: <7xr7y9g3kj.fsf@ruckus.brouhaha.com>

"John Benson" <jsbenson at bensonsystems.com> writes:
> Before reading about Open Firmware, I had assumed that Forth had completely
> dropped out of sight. Anyone else aware of counterexamples?

There's still a very active comp.lang.forth newsgroup filled with
dedicated Forth users.


From reply.in.the.newsgroup at my.address.is.invalid  Fri Jan  9 19:12:53 2004
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Sat, 10 Jan 2004 01:12:53 +0100
Subject: Straw poll on Python performance (was Re: Python is far from
	a	top performer ...)
References: <ryELb.238$tK2.228@amstwist00><3fff234a$0$129$e4fe514c@dreader3.news.xs4all.nl>	<3FFF26A1.943DEA84@engcorp.com>
	<026e01c3d702$970ec5a0$6401fea9@YODA>
	<mailman.251.1073690366.12720.python-list@python.org>
Message-ID: <boguvv8d25t1jmkmhdjpuojrtjnp39j1vc@4ax.com>

Mike C. Fletcher:
>I am often found optimising.

By an unoptimized or by an optimizing coworker? :-)

-- 
Ren? Pijlman


From jepler at unpythonic.net  Mon Jan 26 16:04:10 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Mon, 26 Jan 2004 15:04:10 -0600
Subject: Deleting objects
In-Reply-To: <a33a46fe50e2ab07720a1118aa22d576@news.teranews.com>
References: <a33a46fe50e2ab07720a1118aa22d576@news.teranews.com>
Message-ID: <20040126210410.GA22799@unpythonic.net>

On Mon, Jan 26, 2004 at 08:04:16PM +0000, user at domain.invalid wrote:
[Can I execute]
> 	for t in db.tables:
> 		del t
> 	
> and expect that I have cleaned up all of my
> memory?

The above code clearly doesn't "free" anything, because there are still
references to each of the values 't' has at deletion---namely, the entry
in db.tables!

Jeff



From km at mrna.tn.nic.in  Sat Jan 17 13:15:10 2004
From: km at mrna.tn.nic.in (km)
Date: Sat, 17 Jan 2004 23:45:10 +0530
Subject: yield
In-Reply-To: <20040117165920.GA31881@nl.linux.org>
References: <20040117170808.GA21486@mrna.tn.nic.in>
	<20040117165920.GA31881@nl.linux.org>
Message-ID: <20040117181510.GA21559@mrna.tn.nic.in>

Hi gerrit,

i ran the snippet but i am sorry, i couldnt get what u were saying.
kindly enlighten,
regards,
KM

---------------------------------------------------------------------
On Sat, Jan 17, 2004 at 05:59:21PM +0100, Gerrit Holl wrote:
> > i didnt understand the purpose of  'yield' keyword and the concept of 'generators' in python.  can someone explain me with a small example how  generators differ from normal function calls?
> > kindly enlighten
> 
> You can see 'yield' as a continuable function:
> 
> def f():
>     yield time.time()
>     yield time.time()
>     yield time.time()
> 
> now f() will return a generator, with a .next() method. Try:
> g = f()
> g.next()
> g.next()
> g.next()
> 
> on the interactive prompt, and see what happens...
> 
> yours,
> Gerrit.
> 
> -- 
> Mozilla _is_ the web: it grows faster than you can download it.
> 1011001 1101111 1110101 1110010 1110011 0101100
> 1000111 1100101 1110010 1110010 1101001 1110100

-- 







From ramen at lackingtalent.com  Sat Jan 10 13:34:01 2004
From: ramen at lackingtalent.com (Dave Benjamin)
Date: Sat, 10 Jan 2004 18:34:01 -0000
Subject: need help translating a PHP for statement to python
References: <a015bde3.0401100050.3e6b58c9@posting.google.com>
	<mailman.260.1073726548.12720.python-list@python.org>
Message-ID: <slrnc00ht2.itm.ramen@lackingtalent.com>

In article <mailman.260.1073726548.12720.python-list at python.org>, Eli Pollak wrote:
> Haha ... you must be originally a perl coder. Who else writes attricious
> code like this
>     if ($bar = (($x_ar[$x] -= $prd + $bar) < 0))

I know, I know! C programmers! Right?

-- 
.:[ dave benjamin (ramenboy) -:- www.ramenfest.com -:- www.3dex.com ]:.
: d r i n k i n g   l i f e   o u t   o f   t h e   c o n t a i n e r :


From irmen at -NOSPAM-REMOVETHIS-xs4all.nl  Sun Jan 11 18:02:16 2004
From: irmen at -NOSPAM-REMOVETHIS-xs4all.nl (Irmen de Jong)
Date: Mon, 12 Jan 2004 00:02:16 +0100
Subject: ANN: Snakelets 1.21 (simple-to-use web app server with dynamic
	pages)
Message-ID: <4001d5f9$0$328$e4fe514c@news.xs4all.nl>

I'm happy to say that Snakelets 1.21 is available, which
contains some important fixes since the last version.

--- WHAT IS IT ---
Snakelets is a Python web application server, mainly for educational
purposes (but it works fine, mind you). This project provides a threaded web
server, Ypages (HTML+Python language, similar to Java's JSPs) and Snakelets:
code-centric page request handlers (similar to Java's Servlets).
It is possible to run Snakelets off a CD (read-only mode).

Snakelet's focus is on understanding the way dynamic web sites are created
(the code is very compact and easy to understand), and make this process as
easy as possible, while still providing a rich and powerful server
environment.

It's released under the open-source MIT Software license.

--- DOWNLOAD ---
You can download from http://snakelets.sourceforge.net
(go to the SF project site, and then the file section).

To start, you can edit the vhost config file (see docs, not required)
and then run the serv.py script, or the monitor.py script if you want to
start it as a daemon (on Unix).

--- FIXES ---
Important changes since 1.20:

* virtual host config has been disabled by default, Snakelets
   will use the old webapp loading method without vhosts.
* fixed some issues related to virtual hosts:
   external port (when running behind a forwarding proxy),
   url retrieval methods, better config check, manage menu.
* fixed bug in '/'-related forwarding on Windows
* fixed some socket connection problems
* it's possible again to reload a web application
* example webapps now have a proper index.html/index.y start location
* fixed package name clash in test webapp: snakelets is now tsnakelets
* mp3 streaming possibilities are now complete (by album/year/etc)


Enjoy,
--Irmen de Jong.


From sdfATexpertuneDOTcom  Mon Jan 19 14:43:57 2004
From: sdfATexpertuneDOTcom (Scott F)
Date: Mon, 19 Jan 2004 19:43:57 -0000
Subject: HowTo distinguish between File and Directory
Message-ID: <Xns94758BB1DDFADsdfexpertunecom@216.168.3.44>

On Win32, is there a function in the standard modules that can take a 
pathname and return whether it refers to a File or a Directory?  

Scott


From mark at mceahern.com  Thu Jan 29 13:51:07 2004
From: mark at mceahern.com (Mark McEahern)
Date: Thu, 29 Jan 2004 12:51:07 -0600
Subject: conditional expression sought
In-Reply-To: <pRbSb.330334$ts4.37644@pd7tw3no>
References: <pRbSb.330334$ts4.37644@pd7tw3no>
Message-ID: <4019561B.8040501@mceahern.com>

Elaine Jackson wrote:

>If bool(B_i)==True for 1<=i<=n and j is the smallest i with bool(A_j)==True,
>then the evaluation of (A_1 and B_1) or ... or (A_n and B_n) returns B_j without
>evaluating any other B_i. This is such a useful mode of expression that I would
>like to be able to use something similar even when there is an i with
>bool(B_i)==False. The only thing I can think of by myself is ( (A_1 and [B_1])
>or ... or (A_n and [B_n]) )[0], and I can't be satisfied with that for obvious
>reasons. Does anybody know a good way to express this? Any help will be mucho
>appreciado.
>
Why not write a unit test that demonstrates the behavior you want?  
It'll then likely be obvious to someone both what your problem is and 
what a likely solution is.

Cheers,

// m



From mark at mceahern.com  Wed Jan 14 23:19:42 2004
From: mark at mceahern.com (Mark McEahern)
Date: Wed, 14 Jan 2004 22:19:42 -0600
Subject: Inserting while itterating
In-Reply-To: <pan.2004.01.14.08.43.00.894047@thomas-guettler.de>
References: <pan.2004.01.14.08.43.00.894047@thomas-guettler.de>
Message-ID: <1074140382.26201.26.camel@dev.internal>

On Wed, 2004-01-14 at 02:43, Thomas Guettler wrote:
> Hi,
> 
> Simple excerise:
> 
> You have a sorted list of integers:
> l=[1, 2, 4, 7, 8, 12]
> 
> and you should fill all gaps:
> 
> result == [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]
> 
> How would you code this?
> 
> Constrain: The original list should be changed,
> don't create a copy.

In the spirt of unit testing...

#!/usr/bin/env python

import unittest

def fillGaps(seq):
    expectedLength = seq[-1] - seq[0] + 1
    i = 1
    while i < expectedLength:
        if seq[i] - seq[i-1] > 1:
            seq.insert(i, seq[i-1] + 1)
        i += 1

class test(unittest.TestCase):

    def test(self):
        l = [1, 2, 4, 7, 8, 12]
        fillGaps(l)
        self.assertEquals(l, range(1, 13))

unittest.main()





From jacek.generowicz at cern.ch  Tue Jan 13 04:18:14 2004
From: jacek.generowicz at cern.ch (Jacek Generowicz)
Date: 13 Jan 2004 10:18:14 +0100
Subject: Why learn Python ??
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<pan.2004.01.12.20.18.36.606924@yahoo.com>
Message-ID: <tyfoet8dx61.fsf@pcepsft001.cern.ch>

Samuel Walters <swalters_usenet at yahoo.com> writes:

> because there seem to be many more introductory tutorials and a lot of
> advice that one should learn Scheme, then move to Common Lisp.

Careful. If you were to make such a suggestion on comp.lang.lisp, then
you'd be likely to be told that learning Scheme first will cause you
irreversible brain damage. Of course, now that He Whose Name Must Not
Be Mentioned is no longer posting there, the words which will be used
to point this out will probably be less colourful.

:-)


From jcarlson at uci.edu  Wed Jan 21 11:53:02 2004
From: jcarlson at uci.edu (Josiah Carlson)
Date: Wed, 21 Jan 2004 08:53:02 -0800
Subject: Dailing modem.
References: <mailman.584.1074695527.12720.python-list@python.org>
Message-ID: <20040121084921.FB3A.JCARLSON@uci.edu>

> I need to dail a modem from python and disconnect it again. Is there a pythonic way of doing this? Life is just too short for fiddling with the complexity of TAPI via COM. But if you do have a TAPI-way of doing this, please share.
> 
> Help will be welcomed greatly!

Herman,

You can actually open up a file called 'COM1' or 'COM2' (or any other
com ports) and do writes to them without any win32 extensions (reads are
another matter entirely).  There are tricks so that you're not trying to
open the port with both Python and some other app, but as long as your
secondary application doesn't have a hold, you can send both 'ATDT
<phone number>\r\n' and '+++ATH\r\n', for desired "dial then hangup"
behavior.

 - Josiah



From mhammond at skippinet.com.au  Mon Jan 12 00:48:27 2004
From: mhammond at skippinet.com.au (Mark Hammond)
Date: Mon, 12 Jan 2004 16:48:27 +1100
Subject: Multithreaded COM server problem...
In-Reply-To: <gdv100hgp4tgnclf0c4a4nlr58npi5q3ir@4ax.com>
References: <5a90009ufdd66okc8osajrn1a5kokp86mk@4ax.com>
	<btpug4$1oag$1@arachne.labyrinth.net.au>
	<gdv100hgp4tgnclf0c4a4nlr58npi5q3ir@4ax.com>
Message-ID: <bttcff$qs1$1@arachne.labyrinth.net.au>

John Lull wrote:
> Mark Hammond <mhammond at skippinet.com.au> wrote (with possible deletions):
> 
> 
>>John Lull wrote:
>>
>>
>>>I'm writing a multithreaded COM server to manage a pool of hardware resources.
>>>All objects are designed to be thread-safe, and I've set sys.coinit_flags to
>>>COINIT_MULTITHREADED before importing pythoncom.
>>
>>Note that this flag is effeectively ignored for the server.  Objects are 
>>created in the same "apartment" as their creator.  This, the code 
>>implementing your object need not specify this, but the code *creating* 
>>the object must.  This is what determines the appartment.
>>
>>COM threading rules are complex, but "Python Programming on Win32" (1/2 
>>by me :) covers these rules in words I would have trouble finding again :)
> 
> 
> It covers threading rules for in-process servers pretty thoroughly.
> 
> Unfortunately, this one has to be a local server since it's providing shared
> access to a pool of hardware devices from multiple distributed clients. I've
> carefully reviewed chapters 5 & 12, and appendix D, and wasn't able to find
> anything addressing threading models in the local server in detail. If I've
> missed something, I'd be grateful for any additional hints. 

The problem is that your client code is not running a message loop.  If 
you change the loop of your client test code to something like:

for i in range(delay)*10:
     time.sleep(0.1)
     pythoncom.PumpWaitingMessages()

It works as you expect.  A better choice would probably be 
win32event.MsgWaitForMultipleObjects, but that depends on what your app 
really does.

Mark.



From andy at wild-flower.co.uk  Fri Jan 23 12:10:45 2004
From: andy at wild-flower.co.uk (andy)
Date: Fri, 23 Jan 2004 17:10:45 +0000
Subject: closing database connections
In-Reply-To: <71fd0ae5.0401230838.309e9b02@posting.google.com>
References: <71fd0ae5.0401230838.309e9b02@posting.google.com>
Message-ID: <200401231710.45091.andy@wild-flower.co.uk>

I seem to remember reading somewhere that as client connections are a finite 
(and often scarce) resource, it's not the client but the server that will 
suffer when you do this.

hth,
-andyj




From james.kew at btinternet.com  Sat Jan  3 07:45:31 2004
From: james.kew at btinternet.com (James Kew)
Date: Sat, 3 Jan 2004 12:45:31 -0000
Subject: Starting a script interactively?
References: <37d5fe8f.0401021305.349a440@posting.google.com>
	<bt61ct$3l9db$1@ID-216608.news.uni-berlin.de>
Message-ID: <bt6dee$3rpid$1@ID-71831.news.uni-berlin.de>

"Al Kabaila" <a_kabaila at yahoo.com.au> wrote:
> David Klaffenbach wrote:
> > Is there a way from within a python script to cause the interpreter to
> > be in interactive mode after the script finishes?
>
> In Linux OS, add first line in myscript.py as follows:
> #! /<path to the directory where python lives>/python
> and make sure that myscript.py is executable.  I don't know if this works
> under dos, but there should be some equivalent.

There is, for NT-class systems -- add .py to PATHEXT -- but I think the
Python installer does this automatically. (The ActiveState installer
certainly does.)

But that only answers the question "how do I make a script executable". The
OP wants to know how to have a script drop to the Python interpreter, rather
than back to the shell, when the script completes.

Under Windows, you could achieve this behaviour for _all_ Python scripts by
tweaking the "open" action of the .py file association to add the -i flag.
But I think the OP wants to do it only for _some_ scripts, and from _within_
the script -- nothing comes to mind for this.

James




From usenet at -OBFUSCATION-joefrancia.com  Wed Jan 14 22:44:18 2004
From: usenet at -OBFUSCATION-joefrancia.com (Joe Francia)
Date: Thu, 15 Jan 2004 03:44:18 GMT
Subject: wxPython worries
In-Reply-To: <87eku2rnha.fsf@pobox.com>
References: <mailman.352.1074092092.12720.python-list@python.org>
	<9d1c4d6d.0401141221.22c587f5@posting.google.com>
	<mailman.371.1074116502.12720.python-list@python.org>
	<87eku2rnha.fsf@pobox.com>
Message-ID: <m0oNb.5584672$Id.901410@news.easynews.com>

John J. Lee wrote:
> I'll make my usual comment, which is that nobody has yet contradicted
> me (unusual on USENET ;-) that Qt is the most well-designed Python GUI
> framework.  (Qt Designer is very good, too.)

I'll second that, and go as far as to say it's a very good GUI framework 
no matter how you speak to it.

> And, strangely, the PyQt commercial license is far cheaper than (C++)
> Qt.  $400 for former (Blackadder, from theKompany.com), $2500-odd for
> the latter!

$400 is for preofessional use.  For personal use, it's $80, but you lose 
the right to distribute your apps (but maybe not if you release them 
under the GPL - I should look into that).

> I believe Blackadder comes with Python-specific docs for PyQt, but
> they're actually completely redundant, IMHO -- it's trivial to
> translate the C++ docs to Python code, using the list of exceptions
> distributed with PyQt.

You do get a copy of the docs with your BA purchase.  The Kompany also 
sells the PyQt docs separately for $20 for a one-time purchase, or $70 
for a yearly subscription; that is, all updates for one year are included.

Another BTW: their FAQ page still says
> Blackadder is in beta, but I think somebody here mentioned the final
> version was actually released some while back (PyQt itself has been
> stable for years, of course).

It is indeed stable.  The one thing I don't like about BlackAdder is 
BlackAdder itself, the editor portion.  It's not terrible - it just 
doesn't behave quite like I expect a dedicated Python editor to behave. 
  I usually create my GUI in the Qt Designer, and then edit the Python 
stuff in Eric (Linux) or SciTE (win32).


From sebb at linuxcult.com  Wed Jan  7 09:08:59 2004
From: sebb at linuxcult.com (sebb)
Date: 7 Jan 2004 06:08:59 -0800
Subject: Getting strange characters in the command prompt
References: <56f42e53.0401061704.523f394@posting.google.com>
	<3FFB908F.9010208@v.loewis.de>
Message-ID: <56f42e53.0401070608.47f82423@posting.google.com>

Thanks a lot


From LittleDanEhren at yahoo.com  Tue Jan  6 17:52:21 2004
From: LittleDanEhren at yahoo.com (Daniel Ehrenberg)
Date: 6 Jan 2004 14:52:21 -0800
Subject: Pre-PEP: Dynamically evaluating default function arguments
Message-ID: <711c7390.0401061452.3ee3789f@posting.google.com>

One of the most common bugs that people have on the Python Tutor list
are caused by the fact the default arguments for functions are
evaluated only once, not when the function is called. The solution to
this is usually to use the following idiom:

def write_stuff(stuff=None):
    """Function to write its argument.

Defaults to whatever is in the variable "things"
"""
    if stuff is None:
        stuff = things
    print stuff

However, it would be much more intuitive and concise if the following
could be done instead, but with the guarantee that changes in the
variable 'things' will be noticed:

def write_stuff(stuff=things):
    print stuff

This would instead print whatever is in things when the function is
defined.

The goal of this pre-PEP is to make it so that the default arguments
are evaluated dynamically instead of when the function is created. As
this is a pre-PEP, the details have not been finalized yet. One of the
first details is whether or not the default argument should be checked
to make sure it exists before the function is called. I think it would
make the most sense if things were evaluated when the function was
defined but the result was not saved and was reevaluated whenever the
function is called. This might not be the best way to do it, though,
and it might be better to treat it just like a regular equals sign.

As with any additional dynamic properties added, there is the
possibility of some errors to go uncaught and some. Here is an example
of some hypothetical (but unlikely) code that would cause an error as
a result of this change:

>>> x = 5
>>> def return_something(stuff=x):
        return stuff
>>> return_something()
5
>>> x += 1
>>> return_something() #dynamic now
6
>>> del x
>>> return_something()
Traceback (most recent call last):
  File "<input>", line 1, in ?
NameError: name 'x' is not defined

To me, this seems like the logical behavior, but there is still the
possiblility of some programs being broken. A way to preserve
backwards compatability could be to store the initial evaluation of
the default and use it to fall back on if the variable needed isn't
around anymore, but this seems overly complicated.

Daniel Ehrenberg


From glenfant at bigfoot.com  Fri Jan 16 09:10:21 2004
From: glenfant at bigfoot.com (Gilles Lenfant)
Date: Fri, 16 Jan 2004 14:10:21 -0000
Subject: Making GIF/PNG barcodes
Message-ID: <bu7eps$caa$1@sea.gmane.org>

Hi,

I know that with reportlab + rlbarcode + renderPM + PIL, I could achieve
this, but this seems some overkill to me.
Is there a solution that requires only PIL ?
Google didn't help, or misused it !

Many thanks for any pointer.

--
Gilles






From swalters_usenet at yahoo.com  Mon Jan  5 11:32:06 2004
From: swalters_usenet at yahoo.com (Samuel Walters)
Date: Mon, 05 Jan 2004 16:32:06 GMT
Subject: RELEASED: allout-vim 031229
References: <mailman.26.1072753109.8134.python-list@python.org>
	<pan.2003.12.31.05.47.10.999283@yahoo.com>
	<mailman.70.1072876780.8134.python-list@python.org>
	<pan.2003.12.31.14.49.29.838030@yahoo.com>
	<mailman.72.1072888283.8134.python-list@python.org>
	<yfsr7ykb8a4.fsf@black132.ex.ac.uk>
	<mailman.17.1072988207.12720.python-list@python.org>
	<87d69yqsos.fsf@pobox.com>
Message-ID: <pan.2004.01.05.16.30.56.556063@yahoo.com>

|Thus Spake John J. Lee On the now historical date of Mon, 05 Jan 2004
16:13:55 +0000|
> Of course, you don't always get the whole truth from dictionaries.  I
> remember my sister and I laughing at the translation in our school French
> textbook of "zut" as "bother".  "Bother" must be the mildest swearword (if
> you can call it that) in the English language -- comically so.  We were of
> the opinion that a word that's so clearly designed to be spat must be at
> least two notches up in vulgarity.  :-)

Obligatory:

Mon a?roglisseur est rempli d'anguilles.

(shamelessly stolen from http://www-2.cs.cmu.edu/~sprite/mhifoe.html )

-- 
Never forget the halloween documents.
http://www.opensource.org/halloween/
""" Where will Microsoft try to drag you today?
    Do you really want to go there?"""



From webmaster at beyond-thoughts.com  Thu Jan 15 16:42:47 2004
From: webmaster at beyond-thoughts.com (Christoph Becker-Freyseng)
Date: Thu, 15 Jan 2004 22:42:47 +0100
Subject: PEP for new modules (I read PEP 2)
Message-ID: <40070957.9040202@beyond-thoughts.com>

Hello,

recently there was a lot discussion about a new Path-class. So Gerrit 
Holl started to write a pre-PEP
http://people.nl.linux.org/~gerrit/creaties/path/pep-xxxx.html

We tried to summarize the good ideas and suggestions. Some are still 
missing and concepts of already existing modules have to be 
added/thought over. Furthermore it turns out that not a new class is 
needed but a module. The pre-PEP is already quite big --- Gerrit Holl 
figured out that are bigger ones [1] but I think (and Gerrit Holl 
agrees) that we should write the PEP a bit different.

In PEP 002 about adding a module to the standard library it isn't clear 
(at least I didn't get it) what exactly should be in the pre-PEP for a 
new module.
There's another difference because the Path module does not exist right 
now. However I think it's not wrong first to figure out how a good 
Path-module should look like and then start implementing and continue 
discussion.

I think it would be a good idea to start with a dummy implementation 
that has docstrings. Then we could build the documentation for the 
module automatically and it wouldn't be neccessary to put everything 
into the pre-PEP.
I'd like to keep in the prePEP: Abstract, Motivation, a shortened 
Specification (mostly global structure, definitions, ...), Rationale 
(especially this one seems important to me), BDFL Pronouncement, 
References, Copyright.

So basically I want to relocate the real Specification, because the more 
specific it gets the more it looks like a documentation and the prePEP 
grows and grows ...


Is this a valid option for a PEP?
Better suggestions?


Thank You,
   Christoph Becker-Freyseng


[1]

Some statistics about number of words in different peps:
$ wc -w *.txt | sort -rn | head -20 | nl
     1     6356 pep-0253.txt # subtyping built-in types
     2     5273 pep-0100.txt # python unicode integration
     3     4985 pep-0307.txt # extension to pickle protocol
     4     4985 pep-0249.txt # python database api spec
     5     4694 pep-0258.txt # docutils design spec
     6     4604 pep-0252.txt # types/classes
     7     4551 pep-0101.txt # python releases
     8     4457 pep-0287.txt # reST
     9     4144 pep-0209.txt # multidim. arrays
    10     3968 pep-0225.txt # elementwise operators
    11     3916 pep-0302.txt # new import hooks
    12     3882 pep-xxxx.txt







From gerrit at nl.linux.org  Wed Jan 28 16:21:46 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Wed, 28 Jan 2004 22:21:46 +0100
Subject: comparing booleans
Message-ID: <20040128212146.GA7186@nl.linux.org>

Hi,

is it proper to compare booleans? It is possible, of course, because
they're compatible with numbers, but booleans aren't truly numbers. I'm
tempted to write:

    return cmp(self.extends, other.extends)

instead of

    if self.extends and not other.extends:
        return 1
    else:
        return -1
# I've already verified self.extends != other.extends

...but somehow comparing Booleans doesn't feel right...
Is my feeling correct?

(Hmm, makes me wonder, for booleans, are != and ^ equal?)

Gerrit.

-- 
174. If she bear no sons to her second husband, the sons of her first
husband shall have the dowry.
          -- 1780 BC, Hammurabi, Code of Law
-- 
PrePEP: Builtin path type
    http://people.nl.linux.org/~gerrit/creaties/path/pep-xxxx.html
Asperger's Syndrome - a personal approach:
	http://people.nl.linux.org/~gerrit/english/



From grisha at apache.org  Thu Jan 22 19:14:15 2004
From: grisha at apache.org (Gregory (Grisha) Trubetskoy)
Date: Thu, 22 Jan 2004 19:14:15 -0500
Subject: [ANNOUNCE] Mod_python 2.7.10
Message-ID: <20040122190718.D6531@onyx.ispol.com>


The Apache Software Foundation and The Apache HTTP Server Project are
pleased to announce the release of version 2.7.10 of mod_python.

This release addresses a vulnerability in mod_python 2.7.9 whereby a
specific query string processed by mod_python would cause the httpd
process to crash.

The previously released version 2.7.9 was supposed to correct this issue,
but is still vulnerable.

There are no other changes or improvements from the previous version in
this release.

If you are currently using mod_python 2.7.9 or earlier, it is highly
recommended that you upgrade to 2.7.10 as soon as possible.

If you are using mod_python 3.0.4, no action is necessary.

Mod_python is available for download from:

http://httpd.apache.org/modules/python-download.cgi

For more information about mod_python visit
http://www.modpython.org/

Regards,

Grisha Trubetskoy



From LittleDanEhren at yahoo.com  Tue Jan  6 21:21:49 2004
From: LittleDanEhren at yahoo.com (Daniel Ehrenberg)
Date: 6 Jan 2004 18:21:49 -0800
Subject: Iterating over a binary file
References: <btf5j8$6g26f$1@ID-46268.news.uni-berlin.de>
	<7xznd04ww1.fsf@ruckus.brouhaha.com>
	<du7ptdwsq1t.fsf@lehtori.cc.tut.fi>
	<92urc1-92u.ln1@dman13.dyndns.org>
Message-ID: <711c7390.0401061821.22e24288@posting.google.com>

> Uh-oh.  Don't go there.  If there was no difference, then you would be
> able to perform assignment, even define a class, in the condition of a
> while.  I don't think you want that based on what you said above.  (I
> certainly don't want to have to read code with such complexity!)
> 
> -D

I was able to create an simple text pager (like Unix's more) in some
nested list comprehensions. Just because I can do that doesn't mean
that real programs will be made like that. IMHO the difference between
statements and expressions doesn't really make sense, and it is one of
the few advantages Lisp/Scheme (and almost Lua) has over Python.

Daniel Ehrenberg


From chris.lyon at spritenote.co.uk  Wed Jan  7 07:30:34 2004
From: chris.lyon at spritenote.co.uk (Chris Lyon)
Date: 7 Jan 2004 04:30:34 -0800
Subject: urllib urllib2 what is the difference ?
Message-ID: <d232c5e.0401070430.3c64a8c9@posting.google.com>

Could somebody please explain the difference between these two modules
and explain why they are both required, and if there will ever be a
unification of them?


From andymac at bullseye.apana.org.au  Sat Jan 24 17:37:18 2004
From: andymac at bullseye.apana.org.au (Andrew MacIntyre)
Date: Sun, 25 Jan 2004 09:37:18 +1100 (EST)
Subject: fcntl O_NDELAY constant not found in python 2.3 on linux
In-Reply-To: <20040123190541.31213.qmail@web21206.mail.yahoo.com>
References: <20040123190541.31213.qmail@web21206.mail.yahoo.com>
Message-ID: <20040125093412.G78742@bullseye.apana.org.au>

On Fri, 23 Jan 2004, Ryan Grow wrote:

> import os, fcntl, FCNTL
>
> file = open("/tmp/testfd.txt", 'w')
> fd = file.fileno()
> fl = fcntl.fcntl(fd, FCNTL.F_GETFL)

  fl = fcntl.fcntl(fd, fcntl.F_GETFL)
                       ^^^^^

> fcntl.fcntl(fd, FCNTL.F_SETFL, fl | FCNTL.O_NDELAY)

  fcntl.fcntl(fd, fcntl.F_SETFL, fl | os.O_NDELAY)
                  ^^^^^               ^^

> print "Made it!"


All the symbols in FCNTL are available either in fcntl or os.

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



From sandskyfly at hotmail.com  Wed Jan 21 05:01:29 2004
From: sandskyfly at hotmail.com (Sandy Norton)
Date: 21 Jan 2004 02:01:29 -0800
Subject: personal document mgmt system idea
References: <b03e80d.0401200538.10fcf33a@posting.google.com>
	<100ql5oc1rctc09@news.supernews.com>
Message-ID: <b03e80d.0401210201.227ab60b@posting.google.com>

John Roth  wrote :

> I wouldn't put the individual files in a data base - that's what
> file systems are for. The exception is small files (and by the
> time you say ".doc" in MS Word, it's now longer a small
> file) where you can save substantial space by consolidating
> them.

There seems to be consensus that I shouldn't store files in the
database. This makes sense as filesystems seem to be optimized for,
um, files (-;

As I want to get away from deeply nested directories, I'm going to
test two approaches:

1. store everything in a single folder and hash each file name to give
a unique id

2. create a directory structure based upon a calendar year and store
the daily downloads automatically.

I can finally use some code I'd written before for something like this
purpose:

<code>

from pprint import pprint
import os
import calendar


class Calendirs:

    months = {
        1 : 'January',
        2 : 'February',
        3 : 'March',
        4 : 'April',
        5 : 'May',
        6 : 'June',
        7 : 'July',
        8 : 'August',
        9 : 'September',
        10 : 'October',
        11 : 'November',
        12 : 'December'
    }

    wkdays = {
        0 : 'Monday',
        1 : 'Tuesday',
        2 : 'Wednesday',
        3 : 'Thursday',
        4 : 'Friday',
        5 : 'Saturday',
        6 : 'Sunday' 
    }
    
    def __init__(self, year):
        self.year = year

    def calendir(self):
        '''returns list of calendar matrices'''
        mc = calendar.monthcalendar
        cal = [(self.year, m) for m in range(1,13)]
        return [mc(y,m) for (y, m) in cal]

    def yearList(self):
        res=[]
        weekday = calendar.weekday
        m = 0
        for month in self.calendir():
            lst = []
            m += 1
            for week in month:
                for day in week:
                    if day:
                        day_str = Calendirs.wkdays[weekday(self.year,
m, day)]
                        lst.append( (str(m)+'.'+Calendirs.months[m],
str(day)+'.'+day_str) )
            res.append(lst)
        return res

    def make(self):
        for month in self.yearList():
            for m, day in month:
                path = os.path.join(str(self.year), m, day)
                os.makedirs(path)

Calendirs(2004).make()

</code>


I don't know which method will perform better or be more usable...
testing testing testing.

regards,

Sandy


From usenet at -OBFUSCATION-joefrancia.com  Tue Jan  6 14:52:14 2004
From: usenet at -OBFUSCATION-joefrancia.com (Joe Francia)
Date: Tue, 06 Jan 2004 19:52:14 GMT
Subject: using cgi form via http and extracting results
In-Reply-To: <3ffb0dde.0@news1.mweb.co.za>
References: <3ff84844.0@news1.mweb.co.za>
	<ca4kvvskfmi3mm69t6hq8u8tkmch84jsv1@4ax.com>
	<slrnbvk5vu.js6.bignose-hates-spam@iris.polar.local>
	<3ffaf37b.0@news1.mweb.co.za> <3ffb0dde.0@news1.mweb.co.za>
Message-ID: <NlEKb.4841372$Id.772981@news.easynews.com>

bmgx wrote:
> Ok it's done right..
> 
> import urllib
> a = urllib.urlopen("http://www.suckerservice.com/convert.cgi", 
> "Amount=1&From=EUR&To=USD")
> b = a.readlines()
> c = open("tempresult.html","w")
> 
> i = 0
> d = "********* local copy ******\n\n"
> while i < len(b):
>     d = d + b[i]
>     i = i + 1
> 
> c.write(d)
> c.close()
> a.close()
> 

Instead of constructing the data string by hand, you can pass a 
dictionary or list of 2-item tuples to urllib.urlencode() and get a 
properly formatted string:

my_data = urllib.urlencode({'Amount':1,'From':'EUR','To':'USD'}) # or...
my_data = urllib.urlencode([('Amount',1),('From','EUR'),('To','USD')])
a = urllib.urlopen('http://www.suckerservice.com/convert.cgi', my_data)


From jepler at unpythonic.net  Fri Jan  9 16:43:43 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Fri, 9 Jan 2004 15:43:43 -0600
Subject: Python is far from a top performer according to benchmark
	test...
In-Reply-To: <btn5db$2f8$1@absinth.dialog.net.pl>
References: <ryELb.238$tK2.228@amstwist00> <btn5db$2f8$1@absinth.dialog.net.pl>
Message-ID: <20040109214343.GE2810@unpythonic.net>

numarray is probably the perfect example of getting extremely good
performance from a few simple constructs coded in C. (numarray-0.8 is
less then 50k lines of C code, including comments and blank lines, so
it's also very simple given the amount of "bang" it provides)

All your important logic is in Python, you're in no way stuck worrying
about buffer lengths, when to call free(), and all those other things
that drive me crazy when I try to write in C.  

If I had to execute my Python programs without executing any code
written in "C" behind the scenes, well, I'd be stuck.  Of course, the
situation is about the same for any language you care to name, and if
not then substitute "machine code".  

Jeff



From amy-g-art at cox.net  Mon Jan 19 16:15:22 2004
From: amy-g-art at cox.net (Amy G)
Date: Mon, 19 Jan 2004 13:15:22 -0800
Subject: Simple question from Python newb... What am I doing wrong?  For x, y,
	z in aTuple:
Message-ID: <FNXOb.10918$AA6.1283@fed1read03>

I have a whole bunch of tuples that look something like this,

aTuple = ('1074545869.6580.msg', 't_bryan_pw at gmcc.ab.ca', 'Your one stop
prescriptions')

now that I have this I try

for x, y, z in aTuple:
    do something with x
    do something with y
    do something with z

But I am getting the error that there are too many values to unpack.
If I do...

for x in aTuple:
    print x

It prints the items from the tuple each on its own line.  How can I unpack
these three string values into three different string variables like my
first for loop?

Thanks in advance for answering what is probably a simple question.




From adalke at mindspring.com  Thu Jan 15 02:44:38 2004
From: adalke at mindspring.com (Andrew Dalke)
Date: Thu, 15 Jan 2004 07:44:38 GMT
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
	<K_YMb.10994$9k7.204413@news.xtra.co.nz>
	<bu1qq3$cu440$1@ID-207230.news.uni-berlin.de>
	<n22Nb.11299$9k7.210522@news.xtra.co.nz>
	<bu2pgs$d123a$1@ID-207230.news.uni-berlin.de>
	<4004EC9E.1E2E2893@alcyone.com>
	<23891c90.0401140223.344b22af@posting.google.com>
	<100bbb6kj9m03a4@corp.supernews.com>
	<bu4cdk$cv09p$1@ID-207230.news.uni-berlin.de>
	<1AjNb.8936$1e.894@newsread2.news.pas.earthlink.net>
	<bu56oq$d62os$1@ID-207230.news.uni-berlin.de>
Message-ID: <GxrNb.9363$1e.2036@newsread2.news.pas.earthlink.net>

Me:
> > But if you blabber it to everyone in the manner you have
> > then when you do need someone else's help you're less likely to
> > get it.

Brandon J. Van Every:
> Hello, *what* planet are you on?  You think there's some crowd of people
out
> there just waiting to be useful to me?  There isn't.  That's what I've
just
> taken 6 months to determine.

I'm on planet Earth, while you're on planet BJVE singing
   "I'm in my own world, you can't come in.
    I'm having a party, with make-believe friends."

Reread what I said:  "when you do need someone else's help."
That's in the future.  Unless you never plan to do anything more
than what you did in the last six months?  I also used the singular
"someone" without saying one whit about a "crowd of people."

Me:
> > It's made even worse when you make claims related to your
> > profession (like "Even 12 years ago, "Computer Graphics: Principles
> > and Practice" didn't teach texture mapping.

> It didn't.  I have my copy still, and there is no discussion of texture
> mapping algorithms in it.  It was considered "an advanced subject."

Then you don't own the second edition, which came out a year
before that "12 years ago" comment you made.  Had you said
14 years ago then things would be different.  A slight timing
error perhaps, but properly you should have used the publication
date of your book.  Besides, you made the explicit claim that
DOOM introduced texture mapping to the world when by the
time it came out you could buy off-the-shelf SGI boxes with
hardware texture maps as part of GL, and of course Wolf3D
had texture maps for the walls.

> Whatever dude.  I could care less about such chronologies.

Indeed, since they show your claims of expertise in the field
to be overblown it's no wonder you prefer to ignore it.

> So, why are you here then?  Why are you wasting our
> time, talking about the finer points of my personal history?

Hmmm, you're the one who started wasting our time to talk
about your personal history.  But that would be another
detail of your history you probably don't care about.

> You are here out of a need to remind myself and others of my knowledge or
> lack thereof?  Wow, what an important job.  Hats off to you.

Actually, I'm here on a perhaps misguided hope that you
will see that the style in which you say and do things affects
how people work with you.  An engaging and even thoughtful
commentary tends to get the best side of people, while one
which is spiteful and demeaning gets the worst, and with
consequences that may in this era of Google affect you for
years to come.  That last is of course an extreme but as it is
you appear to be approaching persona non grata in this
forum which makes it less likely that anyone will help you out
in future endeavors.

                    Andrew
                    dalke at dalkescientific.com




From knoppix at laptop.home.net  Sun Jan 11 17:36:27 2004
From: knoppix at laptop.home.net (Knoppix User)
Date: Sun, 11 Jan 2004 16:36:27 -0600
Subject: [Newb] Still not able to solve class attribution
References: <pan.2004.01.11.16.18.09.483280@laptop.home.net>
	<bts1bh$job$02$1@news.t-online.com>
Message-ID: <pan.2004.01.11.22.36.23.577398@laptop.home.net>

On Sun, 11 Jan 2004 18:36:22 +0100, Peter Otten wrote:
 
> Just an idea: how about moving the following statement up immediately after
> the wx.Frame.__init__(...). The DisplayImg() method *could* be called in
> the code you abbreviate with the above four dots.

Thanks for the idea Peter. No go. I did think of that earlier, and checked
a printout very carefully to make sure about that.

Anyway, I did move it up to be the first method after __init__, just to
check again.

:-(

Steve


From cliechti at gmx.net  Sat Jan 31 14:05:43 2004
From: cliechti at gmx.net (Chris Liechti)
Date: Sat, 31 Jan 2004 19:05:43 +0000 (UTC)
Subject: Simple web proxy - help needed
References: <c335e460.0401310918.49361638@posting.google.com>
Message-ID: <Xns9481CC661F417cliechtigmxnet@62.2.16.4>

forshtat at hotmail.com (Ziv Forshtat) wrote in 
news:c335e460.0401310918.49361638 at posting.google.com:

> The problem is that at
> least on my winxp machine all of these servers only seem to work with
> some sites but consistently generate exceptions with others. I keep
> getting "connection reset by peer" and "software caused connection
> abort"...
> Perahps someone has already encountered this problem and solved it??

i have a TCP forwarder program that had similar exceptions.
since i chenged it back from sock.sendall(data) to 
while data:
    	n = sock.send(data)
    	data = data[n:]

it's running stable again. maybe look for sendall's in the sources.

chris

-- 
Chris <cliechti at gmx.net>



From rays at blue-cove.com  Sat Jan 31 16:19:17 2004
From: rays at blue-cove.com (RayS)
Date: Sat, 31 Jan 2004 13:19:17 -0800
Subject: Running External Programs from Within Python
In-Reply-To: <bvh2mf$u7e$07$1@news.t-online.com>
References: <5a40bf6a.0401311123.4b7f783f@posting.google.com>
	<5a40bf6a.0401311123.4b7f783f@posting.google.com>
Message-ID: <5.2.1.1.2.20040131131243.09424ec0@216.122.242.54>

Hi Dirk,

>That is very easy: popen()
>Check the FAQ and documentation again for popen.

That reminds me, I was asked if you can open a bi-directional pipe to 
control an external console program on Windows. A guy has compiled FORTRAN 
(~4,000 lines of 1980's spaghetti) and wants to add a modern GUI and a 
front end method to check data.
Can you both send commands to, and read STDOUT from, a remote console app?

Ray




From graham at rockcons.co.uk  Sun Jan  4 13:18:27 2004
From: graham at rockcons.co.uk (Graham Nicholls)
Date: Sun, 04 Jan 2004 18:18:27 +0000
Subject: Launching pdb from within a script
Message-ID: <UNYJb.14065$Od5.5161@news-binary.blueyonder.co.uk>

I asked this before, but got no response, but I KNOW YOU KNOW ;-)
A year or so ago, I was given a really useful answer to a question posed
here, which showed me how to start the debugger from withing a script. 
Yes, of course I've lost the mail (and I have trawled through all my old
mail), and yes, I know I'm stupid!

I'm surprised this isn't a FAQ, BTW, as it seems such a  useful facility.

So come on guys, cough it up!
Thanks
Graham Nicholls
-- 
#include <wit>


From frank at pc-nett.no  Tue Jan 27 09:03:05 2004
From: frank at pc-nett.no (frank)
Date: Tue, 27 Jan 2004 15:03:05 +0100
Subject: ANN: Soprano 0.05
Message-ID: <bv5r2p$ots8e$1@ID-200515.news.uni-berlin.de>

GUI (wxpython) network scanner written in python that scans a selected range 
of ip addresses and try to get info about the hosts such as users, 
localgroups, shares,operating system, open ports, etc. There is also binary 
windows package available.

new in 0.0.5:

new portscanner with the new 2.3 socket settimeout

portscanner now also looks up portinfo from a txt file stored under 
"data\port-numbers.txt" (http://www.iana.org/assignments/port-numbers).

now scans upto 5 hosts simultaneously.

more settings: set portscanner timeout and set ping timeout

Saves almost everything to xml.

a lot of small fixes.

note: this is very far from the final release

http://sourceforge.net/projects/soprano/




From fumanchu at amor.org  Tue Jan  6 18:02:08 2004
From: fumanchu at amor.org (Robert Brewer)
Date: Tue, 6 Jan 2004 15:02:08 -0800
Subject: Pre-PEP: Dynamically evaluating default function arguments
Message-ID: <DE1CF2B4FEC4A342BF62B6B2B334601E561BCD@opus.amorhq.net>

Daniel Ehrenberg wrote some stuff about evaluating function params at
runtime.

Some of us can recall statements like this one:

"Nevertheless, there's no chance in hell this will ever change, so
let's drop the subject."

--Guido van Rossum
http://mail.python.org/pipermail/python-dev/2002-August/028243.html

..and some of us who don't can easily Google for it.

Are you sure you want to waste (I mean spend) time on this Sisyphean
task Yet Again?


Robert Brewer
MIS
Amor Ministries
fumanchu at amor.org



From adalke at mindspring.com  Mon Jan  5 01:48:54 2004
From: adalke at mindspring.com (Andrew Dalke)
Date: Mon, 05 Jan 2004 06:48:54 GMT
Subject: Project dream
References: <cb035744.0312261236.11d785ac@posting.google.com>
	<f70e3538.0401032044.46de5bf4@posting.google.com>
Message-ID: <qN7Kb.21419$lo3.12729@newsread2.news.pas.earthlink.net>

Lonnie Princehouse:
> I keep thinking that a good graph module would be really handy (as in
> nodes and edges, not plotting)

I've wondered about Boost.  There's Boost Python of course,
and Boost includes a graph library with many of the features you've
listed.  But do the two work well together?  I dunno.

> with the ability to traverse and manipulate graphs in nice Pythonic ways,

And I really don't know if the result will feel Pythonic.  I barely
understand how to make the examples work, much less what
needs to be done to get a full melding.

> basic graph theory (finding cycles, paths, cliques, etc).  I've
> started writing one, but it's nowhere near completion.

I have two C extensions for Python which do max clique detection.
See http://starship.python.net/crew/dalke/clique/ .  But I haven't
tested them in over 4 years.

BTW, I've done various bits of graph theory work for molecular
structures.  I've found that the nomenclature is different enough
that it's hard for chemistry and graph theory to share each other's
data structures directly.  (Eg, we want "atoms", which are
"colored nodes", and "bonds", which are "colored undirected
edges" of low valence (usually 4 or less, rarely above 6, and
never larger than about 13.)

Still, I'll be interested in anything you have, especially
subgraph isomorphism.  (There is Brian Kelly's "Frowns"
package which has a Python interface to the VF algorithm
but it needs to convert to VF's data structures before doing
the search, and that apparently takes most of the time.)

                    Andrew
                    dalke at dalkescientific.com




From peterwu at hotmail.com  Wed Jan 21 15:23:00 2004
From: peterwu at hotmail.com (Peter Wu)
Date: Wed, 21 Jan 2004 15:23:00 -0500
Subject: python mode question
Message-ID: <87y8s1oxuj.fsf@tulip.whu.ca>

A quick question:

After firing C-c C-c to execute a python program in Python mode, an
output buffer will be displayed at the bottom of the window. Also, the
focus remains in the output buffer. How can I switch the focus from the
output buffer to the editing buffer? Thanks!

-- 
       ,,,
      (o o)       Peter Wu
---ooO-(_)-Ooo--- Powered by GNU/Linux 2.4.22


From simonb at NOTTHISBIT.webone.com.au  Fri Jan 16 00:53:01 2004
From: simonb at NOTTHISBIT.webone.com.au (Simon Burton)
Date: Fri, 16 Jan 2004 16:53:01 +1100
Subject: Parsing c-code
References: <bu2uoj$8pc$1@piggy.rz.tu-ilmenau.de>
Message-ID: <pan.2004.01.16.05.53.01.544075@NOTTHISBIT.webone.com.au>

On Wed, 14 Jan 2004 09:27:55 +0100, tm wrote:

> Hello,
> 
> are there recommended modules for parsing c-code. I want to read in
> c-structs and display it in a tree graphic.

I wrote some c declaration parsing code last year.
It handles, eg. gcc's std c library includes OK. (after preprocessing)

http://arrowtheory.com/software/python/index.html

Simon.



From donn at u.washington.edu  Mon Jan 12 19:34:34 2004
From: donn at u.washington.edu (Donn Cave)
Date: Mon, 12 Jan 2004 16:34:34 -0800
Subject: C++ bad-mouthing (was: Why learn Python ??)
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<7xisjh1e3i.fsf@ruckus.brouhaha.com>
	<10064loqc7sd7e3@corp.supernews.com>
	<7xeku496wx.fsf@ruckus.brouhaha.com>
Message-ID: <donn-9D2291.16343412012004@nntp6.u.washington.edu>

In article <7xeku496wx.fsf at ruckus.brouhaha.com>,
 Paul Rubin <http://phr.cx at NOSPAM.invalid> wrote:

> claird at lairds.com (Cameron Laird) writes:
> > >I'd say don't bother with C++ unless you're working on a big
> > >multi-person project.  Its design will make no sense to you unless
> > >you've faced the problems that come up in those projects.  Otherwise
> > >it's a big mess.
> >
> > And if you *are* working on a big multi-person project, and you
> > choose C++, you're likely to end up with ... a big mess.
> 
> C++ was motivated by the problems faced by big projects written in C.
> I'm talking about stuff like telephone switches with hundreds of
> programmers and millions of lines of code.  Even with very competent
> designers and managers, those projects usually ran amuck.  C++ gives
> some real help in keeping projects like that functioning, if the
> programmers and managers know what they're doing.  If they don't know
> what they're doing (as is the case in most projects), C++ isn't that
> likely to help and may make the problems worse.

Hm, to me this proposition seems too self-reliant.  If the
designers and managers fail to thrive on C++, then Q.E.D. -
must not have known what they were doing.

At any rate, as you note, there are other languages such as
Java that may or may not (can't say from experience) offer
some or all of the benefits without the worst problems.  Your
telephone switch example reminds me to mention Erlang, which
is by no means an attempt to offer any of C++'s features but
seems to work in that space.

I don't know if we're on very solid ground from which to laugh
at C++, though.  Python has the advantage of a clean start, but
from a software engineering standpoint it really seems like a
hacker language.  Full of neat tricks that work like magic, but
does it really even attempt to offer anything in the area you're
talking about?

If so, that might be a good direction for yet another book about
Python.

   Donn Cave, donn at u.washington.edu


From max at alcyone.com  Tue Jan 13 21:42:22 2004
From: max at alcyone.com (Erik Max Francis)
Date: Tue, 13 Jan 2004 18:42:22 -0800
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
	<40047290$1@news.012.net.il>
	<bu29ea$ct54l$1@ID-207230.news.uni-berlin.de>
Message-ID: <4004AC8E.46A3104F@alcyone.com>

"Brandon J. Van Every" wrote:

> Why, because I turned around a project in 3 weeks while having the flu
> half
> the time?

Since this "turnaround" involved abandoning your project, it's hard to
see how having devoted 1.5 man-weeks to a project which it should have
only taken you a few man-hours to realize was not going to pay off is an
impressive achievement.  (Why you thought the project was going to be
further any of your personal goals in the first place is completely
beyond my comprehension, as well, but that's another story.)

> I laugh, over and over again, at all the people who declare 3D
> spherical
> icosahedral planetary display engines to be trivial, ...

There's a big difference between "trivial" and "not nearly as impressive
as you seem to think," particularly since your goal was to create a game
and you got nowhere on the actual game (which in frustrating you
abandoned at the time).  And how many man-months did you seek into
_that_ project?

A "3D spherical icosahedral planetary display engine" may be darn neat,
but it's hardly an impressive commercial achivement on its own
(particularly considering how much effort you needed to put into it),
and as a resume-building project it doesn't exactly excite the blood. 
Oh, and by the way, nobody's ever seen it in action except you -- so we
have no idea whether or not it even qualifies as an accomplishment!

> ... or VS .NET 2003
> ports
> of Freeciv to be trivial, ...

But by your own admission, you _haven't_ ported Freeciv to VS .NET 2003.
You got it building, but it doesn't work.  That's hardly an
accomplishment.

> ... or any other project I've sunk blood into
> and run
> into difficulties.  I know better.  It's water off my back because I
> know
> what an armchair peanut gallery sounds like.

The problem is that from everybody else's perspective, you brag about
accomplishments which, from the point of view of everyone else, are not
accomplishments but failures; what projects are there that you have sunk
time into and have paid off, either in having something to show for it,
or having (gasp) made you money?

You're trying to put this weird spin on your public displays of
embarassment is not really working.  Trying and failing is a part of
life.  Trying and failing, over and over again, consistently, despite
insisting quite urgently on how important you are to a community, is
starting to get suspicious.

> Those who never taste failure are haughty.

And those who never taste success should probably come to the
realization, eventually, that they are doing something wrong.

-- 
 __ Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
/  \ San Jose, CA, USA && 37 20 N 121 53 W && &tSftDotIotE
\__/ And a grateful nation will be in his debt.
    -- John F. Kennedy (on the pilot killed in the Cuban Missile


From bkc at Murkworks.com  Fri Jan 23 09:14:58 2004
From: bkc at Murkworks.com (Brad Clements)
Date: Fri, 23 Jan 2004 09:14:58 -0500
Subject: Python Consultants?
References: <8e198b65.0401221315.6d5cb3fe@posting.google.com>
Message-ID: <bura92$cge$1@sea.gmane.org>

"Dan" <arsanalytica at yahoo.com> wrote in message
news:8e198b65.0401221315.6d5cb3fe at posting.google.com...

> Here are a pair XML problems that are available:
>
> #1) Setup to convert these xml files
>
http://www.gothamanalytics.com/PairTools/geturl?url=http://app.quotemedia.co
m/data/getHistory.xml&symbol=SUNW
>
http://www.gothamanalytics.com/PairTools/geturl/?url=http://app.quotemedia.c
om/data/getQuotes.xml?symbols=SUNW
> into a vector of open,close,volume information suitable for use with a
> numerical Python module.  Doing this quickly is a plus.

Can you better define "vector".

Do you want a Numeric array, or a list or tuple? Do you want a different
vector for each of (open, close, volume) (ie, 3 arrays)
or do you want the three values stuck into one tuple/list element and that
element put into an array/list?

What do you mean by "quickly"?  You haven't given an indication of the size
of the file you wish to process. The URL shown above produces a rather small
file. But are you planning to process megabytes of data with multiple
symbols over long periods of time?

SAX can easily parse those xml files without loading them entirely in
memory.

What platform are you running on? Maybe it's quicker to use a C extension
like libxml2 if you're going to parse extremely large files. You haven't
provided enough information about your problem domain.

> #2) Expose the Salesforce.com SOAP functionality from salesforce.com
> generated WSDL files, here is an example WSDL
> http://gothamanalytics.com/Ex/enterprise.wsdl
> See sforce.com for more info on the salesforce.com API.  A Python
> solution is preferred but a work around which uses Java and the
> Salesform.com Apache Axis library and an appropriate gateway from
> python might also be acceptable.  Results from an attempt at using ZSI
> to process the WSDL file is appended to this message.

I think there are others on this list who are (or will soon) need to work
with Salesforce.com.

I have been evaluating it and DreamFactory for a few months, but I don't
have any clients at the moment that need to use either.

If you're just doing "bulk transfer" of data, you might consider a hybrid
approach using JyRetic EAI Server http://sourceforge.net/projects/retic

Otherwise, continued work on the pywebsvcs-talk list could arrive at a
solution in time. In fact, I think I saw a post from you on the list this
week.

If your business has resources that can be applied to fixing problems in ZSI
or SOAPPY that'd be a good way to solve your immediate problem, and "giving
back" to the community.

-Brad


> --
> http://mail.python.org/mailman/listinfo/python-list
>






From maxm at mxm.dk  Wed Jan 28 01:46:52 2004
From: maxm at mxm.dk (Max M)
Date: Wed, 28 Jan 2004 07:46:52 +0100
Subject: Manipulating MIDI
In-Reply-To: <mailman.887.1075263428.12720.python-list@python.org>
References: <mailman.887.1075263428.12720.python-list@python.org>
Message-ID: <40175ADC.6050907@mxm.dk>

Premshree Pillai wrote:

> I am in need of a module using which I could
> manipulate musical information from MIDI files. What I
> need is some module that could extract the frequency
> components of the various instruments in the musical
> piece. Any suggestions?

http://www.mxm.dk/products/public/pythonmidi

regards Max M


From Johannes.Nix at web.de  Fri Jan  2 13:16:12 2004
From: Johannes.Nix at web.de (Johannes.Nix at web.de)
Date: 02 Jan 2004 19:16:12 +0100
Subject: Python as a numerical prototyping language.
References: <jZJDb.3529$7U1.27181@amstwist00>
Message-ID: <67n0966wsz.fsf@aster.homelinux.net>

Carl <phleum_nospam at chello.se> writes:

> Now, I have always believed that Python is a poor performer in terms of
> numerical speed. My experience, however, is that the efficient use of
> dictionaries, lists, precompiled numerical libraries, etc makes Python a
> higly competitive language for scientific computing (in comparison with
> more traditional languages such as C, C++ and different versions of
> Fortran).

First, look at http://www.python.org/topics/scicomp/ .

I am using Python + Numeric since a few years for really
computing-intensive signal processing and real-time audio processing
(explorative noise reduction for hearing aids). I code at least twenty
times faster than I did in pure C.  It works great and on some
occations execution speed has been five times faster than Matlab; on a
Linux system with kernel modifications, Python with C extensios can
achieve worst-case latencies of 20 milliseconds or less for
full-duplex audio processing.  At the other hand side, I use it for
really computing-intensive stuff on a Linux cluster (LAM) with 32
nodes. Plus, it runs neatly on multiprocessor Alpha or Opteron
systems, and can run in embedded systems; no need for a graphic card.

Another quality of Numerical Python that it is very easy to integrate
C code and very mature stuff from Netlib. Scientfic code can be very
difficult to test and verify so a good code base for numerical
routines is paramount. An interesting project for Python would be to
integrate the GNU scientific library and important Netlib routines as
far as possible. The module philosophy of Python, as well as Python's
community culture, supports it very well to use existing code again.

One thing that is quite easy to do is to start coding everything in
Python and develop the algorithm; then identify the hot spots by using
the profiler, and move them to C. Something of the complexity of a MP3
player with net access and graphic user interface can be easily
implemented in Python+C today.

One point about Matlab: The basic Matlab is _expensive_. But in a
commercial environment Matlab with signal processing extensions costs
_tens of thousands of dollars_.  If I were founding an engineering
startup, I would avoid Matlab if possible at all.

> 
> Where is Python heading? Will it be a viable replacement for traditional
> number-crunching languages in the near-term future?
> 

For applications like audio, script languages will replace C and C++
widely in few years, because processors are just fast enough.

In my eyes, what Python, and Open Source in general, is still lacking
is an very easy, fast and very high-quality library for scientific and
financial plotting, although there are lots of good and thougthful
beginnings like Gnuplot, OpenDX, and many more. This would be an
essential building block to foster the use of Python in science.

Another thing that is a hassle for real-time programming on
multiprocessor systems is the Global Interpreter Lock (GIL). For
signal processing and real time replacing the GIL by per-object locks
would be an advance comparable to Linux-2.0. Currently the best
workaround seems to be the use of shared memory and LAM (by the pypar
module).

Johannes

P.S.

The mail address above traps spam. Mail to 
string.replace(address, 'web', 'uni-oldenburg') 


From FBatista at uniFON.com.ar  Fri Jan 30 07:49:05 2004
From: FBatista at uniFON.com.ar (Batista, Facundo)
Date: Fri, 30 Jan 2004 09:49:05 -0300
Subject: PEP 327: Decimal Data Type
Message-ID: <A128D751272CD411BC9200508BC2194D03383560@escpl.tcp.com.ar>

I'm proud to announce that the PEP for Decimal Data Type is now published
under the python.org structure: 

	http://www.python.org/peps/pep-0327.html
	
This wouldn't has been possible without the help from Alex Martelli, Aahz,
Tim Peters, David Goodger and c.l.p itself.

After the pre-PEP roundups the features are almost established. There is not
agreement yet on how to create a Decimal from a float, in both explicit and
implicit constructions.

I depend on settle that to finish the test cases and actually start to work
on the code.

I'll apreciate any feedback. Thank you all in advance.

.	Facundo



From SBrunning at trisystems.co.uk  Tue Jan  6 11:32:54 2004
From: SBrunning at trisystems.co.uk (SBrunning at trisystems.co.uk)
Date: Tue, 6 Jan 2004 16:32:54 -0000 
Subject: Speed?
Message-ID: <31575A892FF6D1118F5800600846864D01200E1D@intrepid>

> From:	Skip Montanaro [SMTP:skip at pobox.com]
>     Peter> And with Python, of course, it's almost trivial to do this kind
>     Peter> of thing, compared to some other languages.  Sigh.
> 
> Which was just another data point in your decision, right?  After all, if
> Python is so much easier to write your benchmarks in than some/most/all of
> the alternatives, that has to factor into the choice of implementation
> language.
 
Not necessarily. Only if you are sane.

Cheers,
Simon Brunning,
http://www.brunningonline.net/simon/blog/
-LongSig





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accept liability for statements made which are clearly the senders own.



From rainerd at eldwood.com  Fri Jan 16 13:23:26 2004
From: rainerd at eldwood.com (Rainer Deyke)
Date: Fri, 16 Jan 2004 18:23:26 GMT
Subject: C++ bad-mouthing (was: Why learn Python ??)
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<7xisjh1e3i.fsf@ruckus.brouhaha.com>
	<10064loqc7sd7e3@corp.supernews.com>
	<dc6f5c99.0401130239.56f9ae36@posting.google.com>
	<3064b51d.0401160539.49fc5893@posting.google.com>
Message-ID: <y_VNb.70561$5V2.74207@attbi_s53>

beliavsky at aol.com wrote:
> What is so dangerous about the STL in C++?

One thing is that iterators can get invalidated when the container is
modified.


-- 
Rainer Deyke - rainerd at eldwood.com - http://eldwood.com




From computer.problemen at skynet.be  Fri Jan  9 03:54:52 2004
From: computer.problemen at skynet.be (broebel)
Date: Fri, 9 Jan 2004 09:54:52 +0100
Subject: python newbie
References: <3ffddcfd$0$16662$ba620e4c@news.skynet.be>
	<5unrvv8u1vpske1j464epj4aff0f54k2nf@4ax.com>
	<UilLb.1570$nt4.1692@attbi_s51>
Message-ID: <3ffe6a9b$0$1809$ba620e4c@news.skynet.be>

as answered by d,

this is dutch

but thanks this how-to is really interesting

"d" <dwelch at localhost.localdomain> schreef in bericht
news:UilLb.1570$nt4.1692 at attbi_s51...
> Rene Pijlman wrote:
>
> > broebel:
> >>first problem is the fact that I started out with a little program who
was
> >>part of a course but the problem is when I launch the program. I don't
> >>have the time to see the result because the screen closes immediately.
> >>Can anyone explain what's happening.
> >
> > The program started, did what it had to do and then terminated :-)
> >
> > "1   How do I run a Python program under Windows?"
> >
>
http://www.python.org/doc/faq/windows.html#how-do-i-run-a-python-program-und
er-windows
> >
> Worked fine for me on Linux... made two suggested changes: 1) use
> raw_input(), not input(), 2) check user input for errors. Sorry, I don't
> know how to say "Enter a number between 0 and 500" in whatever language
> this is in (German?)
>
>
> #!/usr/bin/env python
> while 1:
>     bedrag = raw_input ( 'Geef bedrag tussen 0 en 500 eurocent: ' )
>     try:
>         bedrag = int( bedrag )
>     except ValueError:
>         print "Enter a number between 0 and 500"
>     else:
>         if bedrag < 0 or bedrag > 500:
>             print "Enter a number between 0 and 500"
>         else:
>             break
>
>
> for munt in 200, 100, 50, 20, 10, 5, 2, 1 :
>     aantal = 0
>
>     while bedrag >= munt :
>         aantal = aantal + 1
>         bedrag = bedrag - munt
>
>     if aantal > 0 :
>         print aantal, 'x', munt
> --
> /d/




From tracy at reinventnow.com  Sat Jan 17 17:08:44 2004
From: tracy at reinventnow.com (Tracy Ruggles)
Date: 17 Jan 2004 14:08:44 -0800
Subject: Does anyone else not find the fun in programming...?
References: <d232c5e.0401130823.27fd26ff@posting.google.com>
	<mailman.333.1074027727.12720.python-list@python.org>
Message-ID: <dd32f595.0401171408.218c2c6a@posting.google.com>

Jeff Epler <jepler at unpythonic.net> wrote in message news:<mailman.333.1074027727.12720.python-list at python.org>...
> >>> "fun" in "programming"
>  0  # DANGIT
> >>> "programming".find("fun")
>  -1 # ARGARGHARGH
> >>> "programming".index("fun")
>  ValueError: substring not found in string.index # F***!
> >>> assert "programming" is "fun"
> AssertionError   # I'm going home

curiosities = ("functional programming", "fundamental OO theory", \
        "defunct languages", "economic funnels", "fungal analysis")

["fun" in curiosity for curiosity in curiosities]


From google at axiomatize.com  Thu Jan 15 14:38:39 2004
From: google at axiomatize.com (Laurent Therond)
Date: 15 Jan 2004 11:38:39 -0800
Subject: Binary strings, unicode and encodings
Message-ID: <265368cb.0401151138.37a3a47b@posting.google.com>

Maybe you have a minute to clarify the following matter...

Consider:

---

from cStringIO import StringIO

def bencode_rec(x, b):
    t = type(x)

    if t is str:
        b.write('%d:%s' % (len(x), x))
    else:
        assert 0

def bencode(x):
    b = StringIO()

    bencode_rec(x, b)

    return b.getvalue()

---

Now, if I write bencode('failure reason') into a socket, what will I get
on the other side of the connection?

a) A sequence of bytes where each byte represents an ASCII character

b) A sequence of bytes where each byte represents the UTF-8 encoding of a
Unicode character

c) It depends on the system locale/it depends on what the site module
specifies using setdefaultencoding(name)

---

So, if a Python client in China connects to a Python server in Europe,
must they be careful to specify a common encoding on both sides of the
connection?

Regards,

L.


From sebb at linuxcult.com  Mon Jan 12 20:46:26 2004
From: sebb at linuxcult.com (sebb)
Date: 12 Jan 2004 17:46:26 -0800
Subject: Problem with what raw_input() returns
Message-ID: <56f42e53.0401121746.39b9e4db@posting.google.com>

If I do the following script:

# -*- coding: cp1252 -*-
one = "??"
two = one.replace("?","a")

print two # it prints aa as I expected


But with the following script:

# -*- coding: cp1252 -*-
one = raw_input() # When I run the script, I type ??
two = one.replace("?","a")

print two # it still prints ?? and I want it to print aa


Can someone help me with that problem?
Thanks


From skip at pobox.com  Sun Jan 25 13:05:23 2004
From: skip at pobox.com (Skip Montanaro)
Date: Sun, 25 Jan 2004 12:05:23 -0600
Subject: Python and writing a CSV file
In-Reply-To: <000c01c3e2b7$a6eabcc0$97443d42@homebass1>
References: <mailman.611.1074719029.12720.python-list@python.org>
	<kNDPb.6494$6o4.181@fe2.texas.rr.com>
	<20040121232549.GA28328@mail.theserver.ath.cx>
	<009501c3e07e$80b62e30$97443d42@homebass1>
	<16399.7079.192926.761791@montanaro.dyndns.org>
	<000c01c3e2b7$a6eabcc0$97443d42@homebass1>
Message-ID: <16404.1379.563232.185092@montanaro.dyndns.org>


    Kevin> Thanks for responding. Currently we do not have Python 2.3
    Kevin> installed on our server, is there another way to perform this
    Kevin> task with another module or without a module? Thanks!

The Object Craft module does write CSV files.  When we wrote the module
included with 2.3, we conciously tried to keep it compatible with 2.2, so
you might well be able to just download it and compile it with 2.2 like any
other third-party module.  If that fails, let me know and I'll see if I
can't steer you in the right direction.

Failing all that, if your data is very well-behaved, you can write valid CSV
data quite easily.  Given a list of lists like so:

    data = [
        [1, 2, 4, "My data"],
        ["abc", "def", "ghi"],
        ["234234234", 1.2e7, "!@##%^*"],
    ]

you should be able to write it to sys.stdout with something like (untested):

    for row in data:
        row = [str(e) for e in row]
        print '"' + '","'.join(row) + '"'

Note that the data above doesn't include quotation marks in any of the
fields, the separator is always a comma, and all output will be fully
quoted.  Also, it assumes you're on Windows where you'll automatically get
CRLF terminators.

You should be able to fairly easily extend the above code to handle those
situations.

Skip




From mike at triplepc.com  Tue Jan  6 10:23:01 2004
From: mike at triplepc.com (Michael T. Babcock)
Date: Tue, 06 Jan 2004 10:23:01 -0500
Subject: Pre-PEP: new Path class
In-Reply-To: <E1AdfuD-0005TW-8V@mail.python.org>
References: <E1AdfuD-0005TW-8V@mail.python.org>
Message-ID: <3FFAD2D5.8020209@triplepc.com>

>
>
>So you're saying that a file object or a directory object "has-a"
>path object? Sounds right to me.
>  
>

Correct; a path object should be a path, not a file, not a directory, 
but a path.

I see comments about allowing 'touch' or 'chmod' or other such 
file-centric methods.  I can even understand 'chmod' (in Unix 
environments) since all path objects have permissions, but this would be 
platform specific anyway.  What's wrong with something like 
posix.chmod(path_object, permissions)?

Anyway, enough of my rant for the moment.
-- 
Michael T. Babcock



From sancelot at free.fr  Thu Jan 15 05:25:04 2004
From: sancelot at free.fr (stephane ancelot)
Date: Thu, 15 Jan 2004 11:25:04 +0100
Subject: is it possible to create a win binary file from .py files ?
Message-ID: <200401151125.04886.sancelot@free.fr>

Hi,
I am new to python and I would like to know if there are some ways to provide 
a binary file as target . Because my projects may contain lot of py files and 
I do not want to provide source files . for maintenance puproses it is too 
easier for me to send only one file to my customer. 

Best Regards
Steph

 




From ericavel at badgirl.com  Mon Jan 12 20:24:47 2004
From: ericavel at badgirl.com (ericavel at badgirl.com)
Date: Mon, 12 Jan 2004 20:24:47 -0500
Subject: code Really low price offer New XP Software task
Message-ID: <8RafSsQWjBIi.koRSddyht9kP@badgirl.com>

Hello Python-list
I found This job unique site always
done Windows XP Pro legal - 39.95$
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Best regards



From No.Spam.mc at No.Spam.mclaveau.No.Spam.com  Sun Jan 11 18:44:08 2004
From: No.Spam.mc at No.Spam.mclaveau.No.Spam.com (Michel Claveau/Hamster)
Date: Mon, 12 Jan 2004 00:44:08 +0100
Subject: Python installation breaks Outlook Express
References: <t2k3001mc170t3vdkk7f0mftcjlptkdo6a@4ax.com>
Message-ID: <btsmvj$b43$2@news-reader4.wanadoo.fr>

Hi !

I use P2.3.3 and O.E. without pb ?!?

Suggest : perhaps is your wife buggued ?   ;o)


Michel Claveau







From alanmk at hotmail.com  Mon Jan 19 09:38:50 2004
From: alanmk at hotmail.com (Alan Kennedy)
Date: Mon, 19 Jan 2004 14:38:50 +0000
Subject: Looking for very simple general purpose tokenizer
References: <bug9ij$30k$1@news.tudelft.nl>
Message-ID: <400BEBFA.49815910@hotmail.com>

Maarten van Reeuwijk wrote:
> I need to parse various text files in python. I was wondering if
> there was a general purpose tokenizer available. 

Indeed there is: python comes with batteries included. Try the shlex
module.

http://www.python.org/doc/lib/module-shlex.html

Try the following code: it seems to do what you want. If it doesn't,
then please be more specific on your tokenisation rules.

#-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
splitchars = [' ', '\n', '=', '/',]

source = """
thisshouldcome inthree parts
thisshould comeintwo
andso/shouldthis
and=this
"""

import shlex
import StringIO

def prepareToker(toker, splitters): 
  for s in splitters: # resists People's Front of Judea joke ;-D
    if toker.whitespace.find(s) == -1:
      toker.whitespace = "%s%s" % (s, toker.whitespace)
  return toker

buf = StringIO.StringIO(source)
toker = shlex.shlex(buf)
toker = prepareToker(toker, splitchars)
for num, tok in enumerate(toker):
  print "%s:%s" % (num, tok)
#-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

Note that the use of the iteration based interface in the above code
requires python 2.3. If you need it to run on previous versions,
specify which one.

regards,

-- 
alan kennedy
------------------------------------------------------
check http headers here: http://xhaus.com/headers
email alan:              http://xhaus.com/contact/alan


From No.Spam.mc at No.Spam.mclaveau.No.Spam.com  Sun Jan 11 18:48:15 2004
From: No.Spam.mc at No.Spam.mclaveau.No.Spam.com (Michel Claveau/Hamster)
Date: Mon, 12 Jan 2004 00:48:15 +0100
Subject: delete file with zipfile
References: <4ADeXb$9SJ@wretch.csie.nctu.edu.tw>
Message-ID: <btti4a$i9s$1@news-reader1.wanadoo.fr>

:-)






From nospam-deets at web.de  Tue Jan 13 11:17:35 2004
From: nospam-deets at web.de (Diez B. Roggisch)
Date: Tue, 13 Jan 2004 17:17:35 +0100
Subject: (no subject)
References: <mailman.323.1074007235.12720.python-list@python.org>
Message-ID: <bu15ed$cg38h$1@ID-111250.news.uni-berlin.de>

Hi,

first of all: subjects are important - believe me. This is a question on
serial port access, so you should have mentioned that.

> I have read some of the documentation in Python.
> Before using Python as our project language it would be useful to know
> whether Python has functions, libraries/headers (like C does) capable of
> handling the foll. :
> 
> 1] open and close serial ports,
> 2] set baud rates,
> 3] check parity bit/byte,
> 4] stop bits,
> 5] Hardware handshaking,
> 6] selection of port,......

There exists the very nice pyserial module, which makes serial access a
charm in a os-neutral manner - you can even use jython (python on top of
java) when you install javacom.

I use it in several projects, and it e.g. allows DTR control and the like. I
suggest you dive into the docs at

pyserial.sf.net


Diez




From irmen at -NOSPAM-REMOVETHIS-xs4all.nl  Tue Jan 13 09:03:50 2004
From: irmen at -NOSPAM-REMOVETHIS-xs4all.nl (Irmen de Jong)
Date: Tue, 13 Jan 2004 15:03:50 +0100
Subject: Python
In-Reply-To: <d88cf0080cd0462d2aab21812a04e09b@localhost.talkaboutprogramming.com>
References: <d88cf0080cd0462d2aab21812a04e09b@localhost.talkaboutprogramming.com>
Message-ID: <4003fac6$0$319$e4fe514c@news.xs4all.nl>

sandhya wrote:
> How to generate a .pyd file from a c++ file??

http://www.python.org/doc/faq/extending.html
http://www.python.org/doc/current/ext/ext.html


--Irmen


From fumanchu at amor.org  Fri Jan  2 16:31:51 2004
From: fumanchu at amor.org (Robert Brewer)
Date: Fri, 2 Jan 2004 13:31:51 -0800
Subject: Conditional except: blocks
Message-ID: <DE1CF2B4FEC4A342BF62B6B2B334601E561BBB@opus.amorhq.net>

Aahz wrote:
> That's pretty sick.  If you really need to do that, here's a more
> Pythonic approach:
> 
>     # This goes at beginning of program
>     # or maybe at class/instance initialization
>     if trapErrors:
>         exceptTuple = (Exception,)
>     else:
>         exceptTuple = (None,)
> 
>     # some time later
>     try:
>         return nextHandler(args)
>     except exceptTuple, exc:
>         # Handle exception

Sure, sure. The point was not so much the JIT tuple-unpacking as it was
the (conditional) use of None in the "except" expression.

BTW, I don't think you need a tuple at all. Might we just as well write:

    if trapErrors:
        exceptTuple = Exception
    else:
        exceptTuple = None

?

FWIW (and just to start a flame war ;) I tend to avoid using a flag
(like 'trapErrors'), only to trigger such an intermediate step as the
above. I get antsy when that intermediate value gets used "some time
later". If I were to do something like the above, it would be put
immediately before the actual use. The other option would be to have
whoever is setting trapErrors (to True or False) instead directly set
exceptTuple to Exception, None, or what-have-you.


Robert Brewer
MIS
Amor Ministries
fumanchu at amor.org



From exarkun at intarweb.us  Fri Jan 16 15:58:22 2004
From: exarkun at intarweb.us (Jp Calderone)
Date: Fri, 16 Jan 2004 15:58:22 -0500
Subject: Supressing PyChecker warnings
Message-ID: <20040116205822.GA27418@intarweb.us>

  When using PyChecker on a project which uses bsddb, dozens of messages
like the following are reported:

warning: couldn't find real module for class
         bsddb._db.DBAccessError (module name: bsddb._db)

  I've looked through the PyChecker usage information, documentation, and
browsed some of the source, but I can't find any options for supressing
this.

  Is it possible?  If so, how?

  Thanks in advance,

  Jp



From premshree_python at yahoo.co.in  Tue Jan 13 06:38:14 2004
From: premshree_python at yahoo.co.in (=?iso-8859-1?q?Premshree=20Pillai?=)
Date: Tue, 13 Jan 2004 11:38:14 +0000 (GMT)
Subject: how can I execute a function string
In-Reply-To: <pan.2004.01.13.01.17.27.878470.10201@presidency.com>
Message-ID: <20040113113814.4038.qmail@web8306.mail.in.yahoo.com>

You need to use eval() to run code on-the-fly. See
http://www.python.org/doc/current/lib/built-in-funcs.html

 --- Rajarshi Guha <rajarshi at presidency.com> wrote: >
Hi ,
>  I have some code that generates a function on the
> fly in a string. 
> At a later point in time I want to execute this
> function (which also
> requires a parameters to be passed to it). So the
> code is something like
> this:
> 
> def generate_func():
> 	s = """ def function(x):
> 	print x
> 	return 2
> """
> 	return s
> 
> funcstring = generate_func()
> retval = ....
> 
> That is, retval should have the value returned from
> the evaluation of the
> function in the string funcstring.
> 
> Is this possible by means of simple function calls
> or does this involve
> some sort of black magic?
> 
> Thanks,
> -- 
> http://mail.python.org/mailman/listinfo/python-list 

________________________________________________________________________
Yahoo! India Mobile: Download the latest polyphonic ringtones.
Go to http://in.mobile.yahoo.com



From ajsiegel at optonline.com  Tue Jan 13 13:00:58 2004
From: ajsiegel at optonline.com (Arthur)
Date: Tue, 13 Jan 2004 18:00:58 GMT
Subject: Does anyone else not find the fun in programming...?
References: <d232c5e.0401130823.27fd26ff@posting.google.com>
Message-ID: <a4c800pm8el33j9vb5jbc14e9tfs1bfdpk@4ax.com>

On 13 Jan 2004 08:23:46 -0800, chris.lyon at spritenote.co.uk (Chris
Lyon) wrote:

>I find python very effective as a language and can generally project
>most of my hazy thoughts into it. But FUN !!! This is work dammit,
>I have now ground my teeth down from the number of times I read that
>programming is fun. Football (association) is fun, walking along
>canals is fun, Arguing about quite how useless the British Government
>is fun but programming  ?
>

I reserve Python for fun, i.e. use it for projects having no $ motive.
Scheduling Python  work on  "when the mood stkes me" basis, i.e.
unscheduled.

>Do I need help ?

Since, for me,  it's  most particularly fun when I *should* be doing
something else:  

it would seem, I do.

Art



From python at quixs.com  Thu Jan 15 13:47:05 2004
From: python at quixs.com (Lars Heuer)
Date: Thu, 15 Jan 2004 19:47:05 +0100
Subject: needed PyXPCOM tutorial.
In-Reply-To: <1689232226.20040115193843@quixs.com>
References: <425cc8d1.0401150908.287de0d8@posting.google.com>
	<1689232226.20040115193843@quixs.com>
Message-ID: <1576652975.20040115194705@quixs.com>

Hi,

> It seems, that the pyXPCOM architecture isn't widely used; this
> mailinglist is also very silent. ;)

Sorry, I meant the pyXPCOM mailinglist, this mailinglist isn't silent,
of course. :)

BTW: Are there any known apps which are using Mozilla as platform
(beside Komodo), OpenSource apps?

Thanks,
Lars




From francisgavila at yahoo.com  Tue Jan 13 20:55:35 2004
From: francisgavila at yahoo.com (Francis Avila)
Date: Tue, 13 Jan 2004 20:55:35 -0500
Subject: Unicode and exception strings
References: <svl1xq98gdc.fsf@dresden.uio.no>
	<cf0uvv4m34rgcgoi2nfj3hcgugbah82k96@4ax.com>
	<svl4qv17gw8.fsf@dresden.uio.no>
	<oj6900hku41dphjdep4t54cc9l0jggq195@4ax.com>
Message-ID: <1009fh9tdkk5d70@corp.supernews.com>

Terry Carroll wrote in message ...
>On 12 Jan 2004 08:41:43 +0100, Rune Froysa <rune.froysa at usit.uio.no>
>wrote:
>The only thing is, what to do with it once you get there.  I don't think
>0xF8 is a valid unicode encoding on its own.  IIRC, it's part of a
>multibyte character.

Yes, about that.

What are the semantics of hexadecimal literals in unicode literals?  It
seems to me that it is meaningless, if not dangerous, to allow hexadecimal
literals in unicode.  What code point would it correspond to?

Python 2.3.2 (#49, Oct  2 2003, 20:02:00) [MSC v.1200 32 bit (Intel)] on
win32
Type "help", "copyright", "credits" or "license" for more information.
>>> u'\xf8\u00f8'.encode('unicode-internal')
'\xf8\x00\xf8\x00'

I get the same on linux with Python 2.2.1, x86.

So, is a hexadecimal literal a shorthand for \u00XX, i.e., unicode code
point XX?  Or does it bypass the code point abstraction entirely, preserving
the raw bits unchanged for any encoding of the unicode string (thus
rendering unicode useless)?

Once again, I don't see why hexadecimal literals should be allowed at all,
except maybe for compatability when moving to Python -U behavior.  But I
submit that all such code is broken, and should be fixed.  If you're using
hexadecimal literals, what you have is not a unicode string but a byte
sequence.

This whole unicode/bytestring mess is going to have to be sorted out
eventually.  It seems to me that it would be best to have all bare string
literals be unicode objects (henceforth called 'str' or 'string' objects?),
drop the unicode literal, and make a new type and literal prefix for byte
sequences, possibly dropping the traditional str methods or absorbing more
appropriate ones.  Perhaps some struct functionality could be folded in?

Of course, this breaks absolutely everything.

--
Francis Avila



From maketo at norge.freeshell.org  Thu Jan 15 00:45:27 2004
From: maketo at norge.freeshell.org (Ognen Duzlevski)
Date: Thu, 15 Jan 2004 05:45:27 +0000 (UTC)
Subject: Numeric Python and C
References: <bu44l3$jvv$1@chessie.cirr.com>
	<mailman.379.1074140948.12720.python-list@python.org>
Message-ID: <bu59dn$lvr$1@chessie.cirr.com>

John Hunter <jdhunter at ace.bsd.uchicago.edu> wrote:
>>>>>> "Ognen" == Ognen Duzlevski <maketo at norge.freeshell.org> writes:

>     Ognen> Hi, can someone explain how to change a value within an
>     Ognen> array from a C function?

> Warning: I am not a Numeric C API guru.

> For 1D arrays I use the following macro
[snipped]
> You'll have to do a bit more work for 2D arrays, but this may speed
> you on your way....

Hi, for 2D arrays it is much similar:

get(ndx1,ndx2): array->data + ndx1*array->strides[0] + ndx2*array->strides[1]
set(ndx1,ndx2): I use memcpy(same as get, &val, sizeof(val);

Thanks,
Ognen


From bac at OCF.Berkeley.EDU  Sat Jan 10 23:38:26 2004
From: bac at OCF.Berkeley.EDU (Brett)
Date: Sat, 10 Jan 2004 20:38:26 -0800
Subject: python-dev Summary for 2003-12-01 through 2003-12-31
Message-ID: <4000D342.3010503@ocf.berkeley.edu>

python-dev Summary for 2003-12-01 through 2003-12-31
++++++++++++++++++++++++++++++++++++++++++++++++++++
This is a summary of traffic on the `python-dev mailing list`_ from 
December 1, 2003 through December 31, 2003.  It is intended to inform 
the wider Python community of on-going developments on the list.  To 
comment on anything mentioned here, just post to `comp.lang.python`_ (or 
email python-list at python.org which is a gateway to the newsgroup) with a 
subject line mentioning what you are discussing. All python-dev members 
are interested in seeing ideas discussed by the community, so don't 
hesitate to take a stance on something.  And if all of this really 
interests you then get involved and join `python-dev`_!

This is the thirty-first and -second summaries written by Brett Cannon 
(a friend of a friend actually reads this thing!  Hi, Elle).

To contact me, please send email to brett at python.org ; I do not have 
the time to keep up on comp.lang.python and thus do not always catch 
follow-ups posted there.

All summaries are archived at http://www.python.org/dev/summary/ .

Please note that this summary is written using reStructuredText_ which 
can be found at http://docutils.sf.net/rst.html .  Any unfamiliar 
punctuation is probably markup for reST_ (otherwise it is probably 
regular expression syntax or a typo =); you can safely ignore it, 
although I suggest learning reST; it's simple and is accepted for `PEP 
markup`_ and gives some perks for the HTML output.  Also, because of the 
wonders of programs that like to reformat text, I cannot guarantee you 
will be able to run the text version of this summary through Docutils_ 
as-is unless it is from the original text file.

.. _PEP Markup: http://www.python.org/peps/pep-0012.html

The in-development version of the documentation for Python can be found 
at http://www.python.org/dev/doc/devel/ and should be used when looking 
up any documentation on something mentioned here.  PEPs (Python 
Enhancement Proposals) are located at http://www.python.org/peps/ .  To 
view files in the Python CVS online, go to 
http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/python/ .  Reported bugs 
and suggested patches can be found at the SourceForge_ project page.

The `Python Software Foundation`_ is the non-profit organization that 
holds the intellectual property for Python.  It also tries to forward 
the development and use of Python.  But the PSF cannot do this without 
donations.  You can make a donation at 
http://python.org/psf/donations.html .  Every penny helps so even a 
small donation (you can donate through PayPal or by check) helps.

.. _python-dev: http://www.python.org/dev/
.. _SourceForge: http://sourceforge.net/tracker/?group_id=5470
.. _python-dev mailing list: 
http://mail.python.org/mailman/listinfo/python-dev
.. _comp.lang.python: http://groups.google.com/groups?q=comp.lang.python
.. _Docutils: http://docutils.sf.net/
.. _reST:
.. _reStructuredText: http://docutils.sf.net/rst.html
.. _Python Software Foundation: http://python.org/psf/

.. contents::

.. _last summary: 
http://www.python.org/dev/summary/2003-10-16_2003-11-15.html


=====================
Summary Announcements
=====================
Sorry if this summary comes off as light, but I caught the flu the week 
of Christmas and it developed into walking pneumonia which I still have.

On a more positive note, PyCon is hitting its stride.  Online 
registration is available at http://pycon.org/dc2004 and early bird 
registration ends January 31.  Online talk proposal submission is online 
at http://submit.pycon.org/  and the deadline is January 15.


=========
Summaries
=========
----------------------------
2.3.3 released to the masses
----------------------------
`Python 2.3.3`_ has gone out the door.  Thanks to Anthony Baxter for 
being release manager (again!) and to all of python-dev and anyone who 
contributed code for this release.  With this being a bugfix release 
this supercedes 2.3.2 and thus people should upgrade if possible.

.. _Python 2.3.3: http://python.org/2.3.3/

Contributing threads:
   - `2.3.3 cycle 
<http://mail.python.org/pipermail/python-dev/2003-December/040550.html>`__
   - `release23-maint branch CLOSED for release 
<http://mail.python.org/pipermail/python-dev/2003-December/040852.html>`__
   - `Berkeley support in release23-maint 
<http://mail.python.org/pipermail/python-dev/2003-December/041004.html>`__
   - `RELEASED Python 2.3.3 (release candidate 1) 
<http://mail.python.org/pipermail/python-dev/2003-December/040740.html>`__
   - `2.3.3 portability audit 
<http://mail.python.org/pipermail/python-dev/2003-December/041167.html>`__
   - `2.3.3 and beyond 
<http://mail.python.org/pipermail/python-dev/2003-December/041183.html>`__
   - `RELEASED Python 2.3.3 (final) 
<http://mail.python.org/pipermail/python-dev/2003-December/041286.html>`__
   - `status of 2.3 branch for maintenance checkins 
<http://mail.python.org/pipermail/python-dev/2003-December/041424.html>`__


----------------------------------
Pie-thon competition work ramps up
----------------------------------
`Dan Sugalski`_, project leader of the Parrot_ VM that will be used for 
`Perl 6`_, reminded the list that the benchmark to be used for the 
`Pie-thon`_ needed to be written since the bytecode for the benchmark 
needed to be frozen.

So Guido wrote some benchmarks.  They are in CVS under 
nondist/sandbox/parrotbench .

.. _Dan Sugalski: http://www.sidhe.org/~dan/blog/
.. _Parrot: http://www.parrotcode.org/
.. _Perl 6: http://dev.perl.org/perl6/
.. _Pie-thon: http://www.sidhe.org/~dan/blog/archives/000219.html

Contributing threads:
   - `Merry December 
<http://mail.python.org/pipermail/python-dev/2003-December/040613.html>`__
   - `Pie-thon benchmarks 
<http://mail.python.org/pipermail/python-dev/2003-December/040963.html>`__
   - `Pie-thon benchmark code ready 
<http://mail.python.org/pipermail/python-dev/2003-December/041527.html>`__


--------------
PyCon is a go!
--------------
http://www.pycon.org/ has gone live!  Registration_ is live (early-bird 
ends January 31)!  Online talk proposal submission is live (deadline is 
January 15)!

.. _Registration: http://www.pycon.org/dc2004

Contributing threads:
   - `PyCon DC 2004 - Registration about to open! 
<http://mail.python.org/pipermail/python-dev/2003-December/040553.html>`__
   - `PyCon DC 2004 - Submissions Now Open 
<http://mail.python.org/pipermail/python-dev/2003-December/041012.html>`__


----------------------------------------
operator gains attrgetter and itemgetter
----------------------------------------
The operator module has now gained two new functions: attrgetter and 
itemgetter "which are useful for creating fast data extractor functions 
for map(), list.sort(), itertools.groupby(), and other functions that 
expect a function argument" according to Misc/NEWS .

Contributing threads:
   - `Re: "groupby" iterator 
<http://mail.python.org/pipermail/python-dev/2003-December/040590.html>`__


-------------------
CObjects and safety
-------------------
Michael Hudson pointed out how CObjects could be misused in Python code. 
  Various ideas of how to make them safer by checking that the proper 
CObject was passed were proposed.  The thread seemed to end without a 
resolution, though.

Contributing threads:
   - `are CObjects inherently unsafe? 
<http://mail.python.org/pipermail/python-dev/2003-December/040702.html>`__


-----------------
Unicode is a pain
-----------------
Want proof?  How about the fact that you can store a character like "??" 
either as two characters ("a" followed by "previous character has an 
umlaut") or as one ("a with an umlaut").  The former is called 
"decomposed normal form" and is used in OS X.  Windows, of course, uses 
the latter version.

Contributing threads:
   - `test_unicode_file failing on Mac OS X 
<http://mail.python.org/pipermail/python-dev/2003-December/040778.html>`__


------------------
Two new developers
------------------
Hye-Shik Chang has become a developer.  You probably know him from his 
work on the CJK codecs.  He is now an official developer.

Vinay Sajip, implementor of the logging package has also been granted 
CVS checkin rights.

Contributing threads:
   - `New developer 
<http://mail.python.org/pipermail/python-dev/2003-December/040808.html>`__


------------------------
Compiling 2.4 under .NET
------------------------
Martin v. L?wis has started sandbox work on an MSI installer and moving 
Python 2.4 over to VC 7.

Contributing threads:
   - `Py2.4 pre-alpha snapshot 
<http://mail.python.org/pipermail/python-dev/2003-December/040784.html>`__
   - `First version of Python MSI available 
<http://mail.python.org/pipermail/python-dev/2003-December/041451.html>`__
   - `Switching to VC.NET 2003 
<http://mail.python.org/pipermail/python-dev/2003-December/041452.html>`__


-----------------------------
New method flag: METH_COEXIST
-----------------------------
Raymond Hettinger, in his continual pursuit of speed, came up with a new 
method flag, METH_COEXIST, which causes a method to be used in place of 
a slot wrapper.  The example that actually led to this is __contains__: 
a PyCFunction defining __contains__ tends to be faster than one in the 
sq_contains slot thanks to METH_O and other tricks.

Contributing threads:
   - `FW: METH_COEXIST 
<http://mail.python.org/pipermail/python-dev/2003-December/040940.html>`__


------------------------------
Better relative import support
------------------------------
There was a huge discussion on a better way to handle relative imports 
(think of the situation where you have your module ``import sys`` and 
you happen to have a module named sys in the same directory; should that 
local module be imported or the sys module from the stdlib?).  Luckily 
Aahz volunteered to write a PEP on the whole thread so I am being spared 
from having to summarize the thing.  =)  Thanks, Aahz.

Contributing threads:
   - `Re: Christmas Wishlist 
<http://mail.python.org/pipermail/python-dev/2003-December/040973.html>`__
   - `Re: Python-Dev Digest, Vol 5, Issue 57 
<http://mail.python.org/pipermail/python-dev/2003-December/041078.html>`__
   - `Relative import 
<http://mail.python.org/pipermail/python-dev/2003-December/041065.html>`__
   - `Another Strategy for Relative Import 
<http://mail.python.org/pipermail/python-dev/2003-December/041418.html>`__


------------------------------
list.sorted becomes a built-in
------------------------------
Just as the title says, list.sorted has now been moved out of the list 
type and has been made a built-in.

Contributing threads:
   - `python/dist/src/Python bltinmodule.c,2.304,2.305 
<http://mail.python.org/pipermail/python-dev/2003-December/041129.html>`__


--------------------------------
What to do with old Python code?
--------------------------------
Someone rewrote the bisect module in C.  This brought up the question of 
what to do with the old Python version.  Some suggest moving it to the 
Demo directory.  Others suggest keeping the code but importing the C 
version in the Python module.  The idea of keeping both was quickly shot 
down, though, like in the pickle/cPickle situation.

This discussion is still going at this time.

Contributing threads:
   - `SF patch 864863: Bisect C implementation 
<http://mail.python.org/pipermail/python-dev/2003-December/041511.html>`__



From steve at ninereeds.fsnet.co.uk  Sat Jan 31 05:45:31 2004
From: steve at ninereeds.fsnet.co.uk (Stephen Horne)
Date: Sat, 31 Jan 2004 10:45:31 +0000
Subject: PEP 327: Decimal Data Type
References: <mailman.1054.1075487007.12720.python-list@python.org>
	<bvef14$919$1@news.service.uci.edu>
	<ad052e5c.0401310101.1c5bd5aa@posting.google.com>
Message-ID: <h6um10dknflfcgt3id6tril2fs3lbb3vsq@4ax.com>

On 31 Jan 2004 01:01:41 -0800, danb_83 at yahoo.com (Dan Bishop) wrote:

>I disagree.

<snip>

>But even if the number base of a measurement doesn't matter, precision
>and speed of calculations often does.  And on digital computers,
>non-binary arithmetic is inherently imprecise and slow.  Imprecise
>because register bits are limited and decimal storage wastes them. 
>(For example, representing the integer 999 999 999 requires 36 bits in
>BCD but only 30 bits in binary.  Also, for floating point, only binary
>allows the precision-gaining "hidden bit" trick.)  Slow because
>decimal requires more complex hardware.  (For example, a BCD adder has
>more than twice as many gates as a binary adder.)

I think BSD is a slightly unfair comparison. The efficiency of packing
decimal digits into binary integers increases as the size of each
packed group of digits increases. For example, while 8 BCD digits
requires 32 bits those 32 bits can encode 9 decimal digits, and while
16 BCD digits requires 64 bits, those digits can encode 19 decimal
digits.

The principal is correct, though - binary is 'natural' for computers
where decimal is more natural for people, so decimal representations
will be relatively inefficient even with hardware support. Low
precision because a mantissa with the same number of bits can only
represent a smaller range of values. Slow (or expensive) because of
the relative complexity of handling decimal using binary logic.

>> Perhaps a generalized BaseN module is called for.  People 
>> could then generate floating point numbers in any base (up to perhaps 
>> base 36, [1-9a-z]).

<snip>

>> ... Of course then you have the same problem with doing math on two 
>> different bases as with doing math on rational numbers.
>
>Actually, the problem is even worse.
>
>Like rationals, BaseN numbers have the problem that there are multiple
>representations for the same number (e.g., 1/2=6/12, and 0.1 (2) = 0.6
>(12)).  But rationals at least have a standardized normalization.  We
>agree can agree that 1/2 should be represented as 1/2 and not
>-131/-262, but should BaseN('0.1', base=2) + BaseN('0.1', base=4) be
>BaseN('0.11', 2) or BaseN('0.3', 4)?

I don't see the point of supporting all bases. The main ones are of
course base 2, 8, 10 and 16. And of course base 8 and 16
representations map directly to base 2 representations anyway - that
is why they get used in the first place.

If I were supporting loads of bases (and that is a big 'if') I would
take an approach where each base type directly supported arithmetic
with itself only. Each base would be imported separately and be
implemented using code optimised for that base, so that the base
wouldn't need to be maintained by - for instance - a member of the
class. There would be a way to convert between bases, but that would
be the limit of the interaction.

If I needed more than that, I'd use a rational type - I speak from
experience as I set out to write a base N float library for C++ once
upon a time and ended up writing a rational instead. A rational, BTW,
isn't too bad to get working but that's as far as I got - doing it
well would probably take a lot of work. And if getting Base N floats
working was harder than for rationals, getting them to work well would
probably be an order of magnitude harder - for no real benefit to 99%
or more of users.

Just because a thing can be done, that doesn't make it worth doing.

>but what if that base is greater than
>36 (or 62 if lowercase digits are distinguished from uppercase ones)?

For theoretical use, converting to a list of integers - one integer
representing each 'digit' - would probably work. If there is a real
application, that is.


-- 
Steve Horne

steve at ninereeds dot fsnet dot co dot uk


From galfip at freestart.hu  Tue Jan 20 02:59:03 2004
From: galfip at freestart.hu (Peter Galfi)
Date: Tue, 20 Jan 2004 08:59:03 +0100
Subject: Fw: PDF library for reading PDF files
References: <mailman.464.1074430854.12720.python-list@python.org>
	<400BFF7B.95F21050@netsurf.de>
Message-ID: <017601c3df2b$4595d160$7800a8c0@mailer>

Thanks. I am studying the PDF spec, it just does not seem to be that easy
having to implement all the decompressions, etc. The "information" I am
trying to extract from the PDF file is the text, specifically in a way to
keep the original paragraphs of the text. I have seen so far one shareware
standalone tool that extracts the text (and a lot of other formatting
garbage) into an RTF document keeping the paragraphs as well. I would need
only the text.

Any suggestions?

Peter

----- Original Message -----
From: "Andreas Lobinger" <andreas.lobinger at netsurf.de>
Newsgroups: comp.lang.python
To: <python-list at python.org>
Sent: Monday, January 19, 2004 5:02 PM
Subject: Re: Fw: PDF library for reading PDF files


Aloha,

> Peter Galfi schrieb:
> I am looking for a library in Python that would read PDF files and I
> could extract information from the PDF with it. I have searched with
> google, but only found libraries that can be used to write PDF files.
> Any ideas?

Use file, split, zlib and a broad knowledge of the PDF-spec...

Accessing certain objects in the .pdf is not that complicated if
you f.e. try to read the /Info dictionary. Getting text from
actual page content could be very complicated.

Can you explain your 'information' further?

Wishing a happy day
LOBI
--
http://mail.python.org/mailman/listinfo/python-list




From anthony at interlink.com.au  Wed Jan 14 10:02:40 2004
From: anthony at interlink.com.au (Anthony Baxter)
Date: Thu, 15 Jan 2004 02:02:40 +1100
Subject: ProtoCiv: porting Freeciv to Python CANNED 
In-Reply-To: <bu3jb6$n2u$5@tyfon.itea.ntnu.no> 
References: <bu3jb6$n2u$5@tyfon.itea.ntnu.no>
	<bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
	<pan.2004.01.14.01.17.00.970198@fakeemail.com> 
Message-ID: <20040114150240.72A6925AF47@bonanza.off.ekorp.com>


>>> Bent C Dalager wrote
> I've always thought of Cygwin as
> 
> 1) an excellent way to run the Unix-like tools that I know and love and
> 
> 2) a useful intermediate step while porting an app to Windows.

Ah. But with MinGW on top of Cygwin, you get to use Unix tools, yet build
genuine Windows apps. Best of both worlds, for those of us who can't stand
the one enormous GUI style of software development.


-- 
Anthony Baxter     <anthony at interlink.com.au>   
It's never too late to have a happy childhood.




From cygnus at cprogrammer.org  Wed Jan 28 11:42:02 2004
From: cygnus at cprogrammer.org (Jonathan Daugherty)
Date: Wed, 28 Jan 2004 11:42:02 -0500
Subject: wxPython: images from URLs
In-Reply-To: <84fc4588.0401280613.771ac07@posting.google.com>
References: <mailman.810.1075149139.12720.python-list@python.org>
	<fgse10l8pae12p0els55fsujllq2irrj0l@4ax.com>
	<84fc4588.0401280613.771ac07@posting.google.com>
Message-ID: <20040128164202.GA15726@mail.theserver.ath.cx>

# self._imgstream = urllib2.urlopen(url).read()
# stream=cStringIO.StringIO(self._imgstream)
# 
# try:
#    img=wxImageFromStream(stream)
# except:
#    pass

I have tried this and it appears to work, but once I have
the image (from wxImageFromStream), I use it as follows:

try:
    bm = wxBitmap(img)
    self.bitmap.setBitmap(bm)
except Exception, e:
    print e

And the exception (raised by wxBitmap(img)) is:

  String or Unicode type required

(The exception is a TypeError exception.)

Any ideas?  No exceptions are raised by the block that
creates the image from the data stream.  The image is
a JPG image, and I pass wxBITMAP_TYPE_JPEG to
wxImageFromStream.  I have also tried omitting it as
well.

-- 

  Jonathan Daugherty
  http://www.cprogrammer.org

  "It's a book about a Spanish guy called Manual, you should read it."
                                                            -- Dilbert



From jnoller at reference-info.com  Wed Jan 21 11:00:39 2004
From: jnoller at reference-info.com (Jesse Noller)
Date: 21 Jan 2004 08:00:39 -0800
Subject: problems iterating over a files lines
Message-ID: <2835a96b.0401210800.4b89d878@posting.google.com>

I am a relative newbie to python and I am having issues trying to
iterate over the lines of a file.

I have a text file - foo.bar inside of this file are lines of text:

x-3411342
y-1324123
w-2314121

Each with a trailing \n to designate the end of the line.

I am trying to read this file into python - which is simply in and of
itself, however:

file = open("foo.bar", "rb")
while 1:
    lines = file.open().split('\n'):
    if not lines:
           break
    for lines in lines:
           key = line
           get.key(key)
           results = [key, get.up, get.down]
file.close()

Appends an extra "blank" line to the list of lines, which causes the
program to crash - secondly, I've looked at about 20 examples, and all
of them (including this one) suffer from the problem of looping over
the lines for the number of lines.

What I want to do is open the contents of the file - read the line and
set a variable - key, and for each line in the file, I want to do
something with that key - but only once. So I want to read in a line,
set to a variable, do something, print, and then do it for the next
line.


Any help is appreciated. Thank you.


From johnfabel at btinternet.com  Wed Jan 21 14:35:55 2004
From: johnfabel at btinternet.com (John Abel)
Date: Wed, 21 Jan 2004 19:35:55 +0000
Subject: Python database
In-Reply-To: <3jmq001uhc0nbdartig19sbfovoo520g0a@4ax.com>
References: <fa538331.0401200246.3a8da8fd@posting.google.com>	<mailman.539.1074597476.12720.python-list@python.org>
	<3jmq001uhc0nbdartig19sbfovoo520g0a@4ax.com>
Message-ID: <400ED49A.60800@btinternet.com>

My apologies for that.  That'll teach me not to expand my mail window!

Dennis Lee Bieber wrote:

>On Tue, 20 Jan 2004 11:12:21 +0000, John Abel <john.abel at pa.press.net>
>declaimed the following in comp.lang.python:
>
>  
>
>>*Have a look at gadfly, gadfly.sf.net
>>*
>>    
>>
>	He did... and said so...
>  
>
>>Brice Vissi?re wrote:
>>
>>    
>>
><snip>
>
>  
>
>>>My first thought was to use Gadfly. I've downloaded and installed it.
>>>Now, I'm  investigating the documentation and examples to find string
>>>capabilities of Gadfly, but at first look, it seems that it will not
>>>fit to my needs.
>>>      
>>>
>
>	Must be an obscure paragraph... <G>
>
>--  
> > ============================================================== <
> >   wlfraed at ix.netcom.com  | Wulfraed  Dennis Lee Bieber  KD6MOG <
> >      wulfraed at dm.net     |       Bestiaria Support Staff       <
> > ============================================================== <
> >           Home Page: <http://www.dm.net/~wulfraed/>            <
> >        Overflow Page: <http://wlfraed.home.netcom.com/>        <
>  
>



From scott.b.drummonds.nospam at intel.com  Tue Jan 27 14:48:28 2004
From: scott.b.drummonds.nospam at intel.com (Scott Brady Drummonds)
Date: Tue, 27 Jan 2004 11:48:28 -0800
Subject: PyObject_Size
Message-ID: <bv6fac$ip2$1@news01.intel.com>

Hi, everyone,

I'm seeing a problem in a legacy Python script in a tool I use where the
script is unable to load a shared library.  Version 1.5.2 of Python
complains that "...undefined symbol: PyObject_Size" while more recent
versions work just fine.

I presume that what's going on is that older versions of Python required
shared libraries that are Python-loadable to have this function (which I
realize returns an object's size) specified.  It also appears that new
versions don't require this function any more.  What happened in between
that old version and the current ones with regards to this symbol?  Why was
this required before but not any longer?

Thanks,
Scott

-- 
Remove ".nospam" from the user ID in my e-mail to reply via e-mail.




From mmoum-xxxspam at woh.rr.com  Fri Jan 16 18:46:05 2004
From: mmoum-xxxspam at woh.rr.com (DoubleM)
Date: Fri, 16 Jan 2004 23:46:05 GMT
Subject: Tkinter: modal ok in windows, but not in Linux
References: <NWkNb.2858$fU.1773@fe2.columbus.rr.com>
	<a7a67196.0401160353.5f7d4ae2@posting.google.com>
	<bu8u8f$45n$1@news-reader1.wanadoo.fr>
Message-ID: <1J_Nb.5971$372.2045@fe1.columbus.rr.com>

Eric Brunel wrote:

<much snipped here>

> This won't however solve the OP's problem, which is that the main window
> can still be closed when the second window is running.
> 
> We've had the same problem, and I finally ended up thinking this problem's
> is not Python's fault, nor Tkinter's one, nor even tk's one: with X11, the
> controls on the window frame are actually managed not by the client
> application (from the X11 server point of view), but by the window
> manager. If the window manager decides to ignore the grab set on one of
> your windows and to continue to treat events for the other windows, you're
> stuck. The only thing you can do is treating the window deletion event to
> explicitely ignore it via a root.protocol('WM_DELETE_WINDOW', ...). There
> may be a way of doing it automatically at tk's level, but it would
> certainly be a big work, not to mention that there may be some window
> managers that *do* take the grab_set into account, and so where this work
> would be unnecessary.

Thanks for the replies.  I rather suspected as much, given that it works
find in Windows XP, but was hoping I was wrong.

Mike



From quentel.pierre at wanadoo.fr  Sat Jan 24 02:42:32 2004
From: quentel.pierre at wanadoo.fr (Pierre Quentel)
Date: Sat, 24 Jan 2004 08:42:32 +0100
Subject: Server and Client Socket problem
References: <bur59q$kel$1@nsnmrro2-gest.nuria.telefonica-data.net>
Message-ID: <but7lb$46j$1@news-reader1.wanadoo.fr>

Apart from indentation, you had forgotten the "try" statement in client
This should work better :

Client

---------------------
import socket

def run():
    try:
        cliente = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        cliente.connect(('localhost', 6969))
    except:
        print "No he podido Conectar con el Servidor"
        return
    datos = '12345678'
    cliente.send(datos)
    #cliente.close()

run()

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

Server

---------------------
import socket

def run():
    servidor = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    servidor.bind(('localhost', 6969))
    servidor.listen(1)
    while 1:
        (conexion, direccion) = servidor.accept()
        datos = conexion.recv(4069)
        print "Servidor Recibe", datos
        if datos == "quit":
            servidor.close()
            break

run()
---------------------

@+
Pierre




From a.schmolck at gmx.net  Thu Jan  8 07:59:03 2004
From: a.schmolck at gmx.net (Alexander Schmolck)
Date: 08 Jan 2004 12:59:03 +0000
Subject: Descriptor puzzlement
References: <vvqjj92il4o1d0@news.supernews.com>
Message-ID: <yfsisjmwq94.fsf@black132.ex.ac.uk>

"John Roth" <newsgroups at jhrothjr.com> writes:
> What's happening here?

cf.

class AnotherObject(object):
    prop = AnObject("snafu")

'as


From mbabcock at fibrespeed.net  Fri Jan  9 10:45:06 2004
From: mbabcock at fibrespeed.net (Michael T. Babcock)
Date: Fri, 09 Jan 2004 10:45:06 -0500
Subject: Database interfacing
Message-ID: <3FFECC82.20305@fibrespeed.net>

I'm working with databases (MySQL primarily) more and more with Python, 
and having used PERL in the past for similar work, I'm wondering if 
there are good tools for doing 'intelligent' selects/inserts to/from 
dictionaries, etc.  For example:

data = {'FirstName': 'Michael', 'LastName': 'Babcock', 'Age': 99}
lastid = db.insert('Users', data)

... which would execute "INSERT INTO Users (FirstName, LastName, Age) 
VALUES ('Michael', 'Babcock', 99)"

And also helpful would be:

data = db.query("dbname", "SELECT * FROM Users WHERE Age >= 99)")

... which would return me an array of dictionary items like:

[ {'ID': 143, 'FirstName': 'Michael' ... }, {'ID': 242, ... }, ... ]

Just curious, thanks (I've written a piece of code to generate the array 
of dictionary results myself actually, but I'm sure someone else's is 
better).

-- 
Michael T. Babcock
C.T.O., FibreSpeed Ltd.
http://www.fibrespeed.net/~mbabcock





From martin at v.loewis.de  Sun Jan 18 16:56:19 2004
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 18 Jan 2004 22:56:19 +0100
Subject: parse binary file in python?
In-Reply-To: <Pine.LNX.4.58.0401182201180.1249@leopard.stud.ntnu.no>
References: <Pine.LNX.4.58.0401182201180.1249@leopard.stud.ntnu.no>
Message-ID: <bueve3$9qv$01$2@news.t-online.com>

Andreas R?sdal wrote:
> I want to parse a binary file in python. Does
> python have some built in methods for doing this easily?
> Any links to example code would be nice..

Depends on the kind of parsing you want to do. Python
can naturally represent binary files in string objects,
e.g.

f = open("binaryfile.bin", "rb") # notice the b for binary mode
data = f.read()
f.close()

You can then look at the individual bytes by index. People
often use the struct and array modules to simplify processing.
Whether or not you would call this "parsing", I don't know
(for me, "parsing" implies presence of a context-free or
regular grammar of some kind).

Regards,
Martin



From me at here.there.com  Wed Jan 14 15:09:16 2004
From: me at here.there.com (Peter Ashford)
Date: Thu, 15 Jan 2004 09:09:16 +1300
Subject: ProtoCiv: porting Freeciv to Python CANNED
In-Reply-To: <bu2pgs$d123a$1@ID-207230.news.uni-berlin.de>
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
	<K_YMb.10994$9k7.204413@news.xtra.co.nz>
	<bu1qq3$cu440$1@ID-207230.news.uni-berlin.de>
	<n22Nb.11299$9k7.210522@news.xtra.co.nz>
	<bu2pgs$d123a$1@ID-207230.news.uni-berlin.de>
Message-ID: <NlhNb.11982$9k7.221029@news.xtra.co.nz>

>>
>>Why do you think OS developers owe you any kind of value at all?
> 
> 
> I don't.  But that's not going to stop me from denigrating them for being
> incapable of fulfillng the kinds of projects I have in mind.

That's like criticising a high class restraunt for not serving burgers. 
  If they don't propose to solve your particular needs, criticising them 
for not doing so is stupid and redundant.

Many OS projects have aims which they fail to reach (often "completion" 
is one of those) and it is fair to criticise them for those failings. 
However it is utterly myopic to criticise them for not reaching aims to 
which they don't aspire - like being your bunch of personal slaves.

It would just as dumb as me criticising you for not advancing OS 
software - you've never intended to, don't care, so the criticism would 
be stupid.

Peter.




From bart_nessux at hotmail.com  Thu Jan  8 22:31:16 2004
From: bart_nessux at hotmail.com (Bart Nessux)
Date: Thu, 08 Jan 2004 22:31:16 -0500
Subject: convert a list to a string
References: <3FFE1E29.20801@hotmail.com> <7xwu81dcr7.fsf@ruckus.brouhaha.com>
Message-ID: <3FFE2084.7010700@hotmail.com>

Paul Rubin wrote:
> Bart Nessux <bart_nessux at hotmail.com> writes:
> 
>>number = random.sample(range(count), 1)
>>
>>This makes 'number' into a one entry list (I don't know why as 'count'
>>is an integer). Is there an easy way to convert 'number' back to an
>>int?
> 
> 
> number = number[0]
> 
> But why are you using random.sample for that?  And making a list of
> size count, just to throw it away?  It sounds like you just want a
> random number between zero and count.  Do that with:
> 
>    number = random.randint(count)

How does randint and sample differ? I was under the impression that 
sample was more random.





From peter at engcorp.com  Thu Jan  8 10:03:53 2004
From: peter at engcorp.com (Peter Hansen)
Date: Thu, 08 Jan 2004 10:03:53 -0500
Subject: Twisted or Medusa or Zope
References: <425cc8d1.0401070808.14690325@posting.google.com>
	<y11Lb.1333$Mb5.23891@news2.e.nsc.no>
Message-ID: <3FFD7159.55630AE0@engcorp.com>

Thomas Weholt wrote:
> 
> My advice ( I got some experience in all of them ) :
> 
> Medusa is old and you have to do alot yourself. You have to know abit about
> HTTP, how async works etc. Get ready to get your hands dirty.
> 
> Twisted is similar to Medusa, but comes with a bunch of very cool
> ready-to-use/more-or-less-stable modules which can be combined into complex

Heh. :-)  

Twisted is similar to Medusa in about the same way that Linux is similar to, 
say, CPM...

-Peter


From mwh at python.net  Fri Jan 23 07:23:39 2004
From: mwh at python.net (Michael Hudson)
Date: Fri, 23 Jan 2004 12:23:39 GMT
Subject: debugging
References: <88bc63c6.0401230416.7acf904c@posting.google.com>
Message-ID: <m3ptda4zw5.fsf@pc150.maths.bris.ac.uk>

writeson at earthlink.net (Doug Farrell) writes:

> Hi all,
> 
> Can someone help me out a little with Python? What do people use to
> debug Python code? I don't understand how to use the built in
> debugger

What have you tried?  pdb.run('...') and pdb.set_trace() may be your
friends.

> and I haven't had any luck getting ddd to debug my Python programs. I
> end up falling back on inserting print statements in my code to figure
> out what's going on. This works but isn't always the fastest route to
> a solution. So, I'm just wondering what other people do.

Well, quite a lot of the time I ... insert print statements in my
code.

I also find stopping and actually thinking hard every now and again
helps, too :-)

Cheers,
mwh

-- 
  ARTHUR:  Yes.  It was on display in the bottom of a locked filing
           cabinet stuck in a disused lavatory with a sign on the door
           saying "Beware of the Leopard".
                    -- The Hitch-Hikers Guide to the Galaxy, Episode 1


From jcarlson at uci.edu  Mon Jan 19 22:11:54 2004
From: jcarlson at uci.edu (Josiah Carlson)
Date: Mon, 19 Jan 2004 19:11:54 -0800
Subject: speedy Python strings?
References: <buhtjb$ida$1@news.rz.uni-karlsruhe.de>
	<roy-96DC3A.20024419012004@reader2.panix.com>
Message-ID: <20040119185543.ABC7.JCARLSON@uci.edu>

> Another possibility is to buffer things in a list, using append to add 
> to the end and pop(0) to pop off the front (a roll-your-own queue).  
> Lists do not suffer from the quadratic behavor that string addition does.

Deleting from the front of a list results in every item being shifted up
a single entry.  While this is insignificant for short lists, it is
significant for long lists:

>>> def del_from_front(size):
...     a = range(size)
...     t = time.time()
...     while a: a.pop(0)
...     return time.time()-t
...
>>> del_from_front(1000)
0.016000032424926758
>>> del_from_front(10000)
0.85899996757507324
>>> del_from_front(20000)
3.2970001697540283
>>> def del_from_end(size):
...     a = range(size)
...     t = time.time()
...     while a: a.pop()
...     return time.time()-t
...
>>> del_from_end(10000)
0.062999963760375977
>>> del_from_end(100000)
0.51600003242492676
>>> del_from_end(1000000)
5.4530000686645508



In terms of buffering as the parent post asks, file IO is already
buffered by the underlying libraries and operating system.  Another
layer of Python buffering doesn't seem to make much sense.  I would
suggest writing off the buffering exercise as a learning experience.

 - Josiah



From shatf at zoominternet.net  Mon Jan 12 10:37:54 2004
From: shatf at zoominternet.net (Scott Hatfield)
Date: Mon, 12 Jan 2004 10:37:54 -0500
Subject: win32com - date parameter for crystal reports
Message-ID: <6.0.0.22.0.20040112102744.01d75648@pop3.zoominternet.net>

Hello, all.

I'm a newbie to Python and am using it to interface with crystal reports 
via com/activex.  I have had wonderful success thus far, but am unable to 
pass a parameter of type 'date.'   I tried using a PyTime object, but it 
would not work for a date parameter.  It *does* work for a datetime.

I searched comp.lang.python and found one person who had this same problem 
(though not with crystal reports), but no replies were posted.

Can anyone shove me in the right direction?

I'm using Python 2.3.2 on WinXP.

Much Thanks,
Scott




From peter at engcorp.com  Thu Jan 15 11:23:42 2004
From: peter at engcorp.com (Peter Hansen)
Date: Thu, 15 Jan 2004 11:23:42 -0500
Subject: Portable filename comparison
References: <QGwNb.46$Ja2.924@nnrp1.uunet.ca>
Message-ID: <4006BE8E.9D3BC764@engcorp.com>

Ken Dyck wrote:
> 
> Is there a way with Python 2.2 to portably test the equivalence of two
> filenames?
> 
> The os.path.samefile function seems to do what I want, but it is only
> available on Unix and Mac. I need something that works on Windows.
> 
> The os.path.normcase and os.path.normpath functions are available on all
> platforms, but don't quite get me there. For example, on Windows
> 
> >>> os.path.normcase(os.path.normpath("C:\Program Files"))
> 'c:\\program files'
> >>> os.path.normcase(os.path.normpath("C:\PROGRA~1"))
> 'c:\\progra~1'
> 
> I suppose I could find a way to call into the Win32 API directly, but I'd
> prefer to use a portable solution if I can find one.

I believe you need to make your own, since the whole concept of thus
mungled long names on Windows is definitely not portable.

Here's a snippet that might make this seem much easier:

>>> def expand(shortname):
...    from win32api import GetLongPathName
...    return GetLongPathName(shortname)
...
>>> expand('c:\\progra~1')
'c:\\Program Files'

-Peter


From simonb at NOTTHISBIT.webone.com.au  Wed Jan 14 19:46:29 2004
From: simonb at NOTTHISBIT.webone.com.au (Simon Burton)
Date: Thu, 15 Jan 2004 11:46:29 +1100
Subject: Numeric Python and C
References: <bu44l3$jvv$1@chessie.cirr.com>
Message-ID: <pan.2004.01.15.00.46.25.716488@NOTTHISBIT.webone.com.au>

On Wed, 14 Jan 2004 19:17:55 +0000, Ognen Duzlevski wrote:

> Hi,
> can someone explain how to change a value within an array from a C
> function?
> 

What about using PyObject_GetItem (is that what it's called?)

I know numarray uses functions for this:

PyArrayObject* NA_InputArray(	PyObject *numarray, NumarrayType t, int requires)
    The purpose of NA_InputArray is to transfer array data from Pythonto C. 

PyArrayObject* NA_OutputArray(	PyObject *numarray, NumarrayType t, int requires)
    The purpose of NA_OutputArray is to transfer data from C to Python. Practically speaking, the output numarray must be a PyArrayObject, and cannot be an arbitrary Python sequence. 

PyArrayObject* NA_IoArray(	PyObject *numarray, NumarrayType t, int requires)
    NA_IoArray has fully bidirectional data transfer, creating the illusion of call-by-reference. 


Simon.



From me at privacy.net  Thu Jan 29 12:08:41 2004
From: me at privacy.net (Duncan Booth)
Date: 29 Jan 2004 17:08:41 GMT
Subject: number of arguments a function takes
References: <CSaSb.329909$ts4.189798@pd7tw3no>
Message-ID: <Xns947FAE6461014duncanrcpcouk@127.0.0.1>

"Elaine Jackson" <elainejackson7355 at home.com> wrote in
news:CSaSb.329909$ts4.189798 at pd7tw3no: 

> Suppose one of the arguments of a function f_1 is another function
> f_2. Can f_1 access the number of arguments taken by f_2?  (I'm
> writing a little script to automate the construction of logical
> truth-tables.)  Thanks. 

Look at the inspect module, in particular you probably want 
inspect.getargspec:

>>> import inspect
>>> def f(a,b): pass

>>> inspect.getargspec(f)
(['a', 'b'], None, None, None)
>>> help(inspect.getargspec)
Help on function getargspec in module inspect:

getargspec(func)
    Get the names and default values of a function's arguments.
    
    A tuple of four things is returned: (args, varargs, varkw, defaults).
    'args' is a list of the argument names (it may contain nested lists).
    'varargs' and 'varkw' are the names of the * and ** arguments or None.
    'defaults' is an n-tuple of the default values of the last n arguments.

>>> 


From skip at pobox.com  Sat Jan 31 10:58:59 2004
From: skip at pobox.com (Skip Montanaro)
Date: Sat, 31 Jan 2004 09:58:59 -0600
Subject: zlib
In-Reply-To: <opr2m0svtf1bpyqk@news.swissonline.ch>
References: <opr2m0svtf1bpyqk@news.swissonline.ch>
Message-ID: <16411.53443.579705.529891@montanaro.dyndns.org>


    Dave> I am looking for a zlib implementation (or any other which can
    Dave> handle zip archives) for Python 1.5.2. I only found one for Python
    Dave> >= 2.2 :-(

Assuming you have access to a C compiler, you might be able to fairly easily
backport the 2.2 version of zlibmodule.c back to 1.5.2.

Skip



From aahz at pythoncraft.com  Tue Jan 27 12:58:41 2004
From: aahz at pythoncraft.com (Aahz)
Date: 27 Jan 2004 12:58:41 -0500
Subject: How does compare work?
References: <40158680$0$7044$ba620e4c@news.skynet.be>
	<mailman.821.1075160455.12720.python-list@python.org>
	<4016A368.9050806@skynet.be>
Message-ID: <bv68sh$gla$1@panix3.panix.com>

In article <4016A368.9050806 at skynet.be>,
Helmut Jarausch  <jarausch at skynet.be> wrote:
>
>First let me say that IMHO this is a big misdesign of Python.

Guido has come around to this POV.  However, being able to compare
different types does have some defensibility.  Your example of an ``if``
isn't directly relevant; what's more important is the question of
sorting a list containing arbitrary information.  This is particularly
true for the case of something like extracting keys from a dict -- you
don't want an exception raised.

What may well happen is that sort comparisons get a different set of
special methods than relational operators.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

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


From aahz at pythoncraft.com  Fri Jan  9 13:01:55 2004
From: aahz at pythoncraft.com (Aahz)
Date: 9 Jan 2004 13:01:55 -0500
Subject: Python 2.3.3 compilation problems an HP-UX
References: <aHwLb.6203$g4.135307@news2.nokia.com>
Message-ID: <btmqaj$1fl$1@panix2.panix.com>

In article <aHwLb.6203$g4.135307 at news2.nokia.com>,
Olaf Meyer  <nomail at nospam.net> wrote:
>
>I'm having some problems compiling Python 2.3.3 on HP-UX (B.11.00).
>I've tried sevral different options for the configure script (e.g. 
>enabling/disabling gcc, aCC) but I always get the same problem during 
>the final linking stage. Several PyThread_* symbols are undefined (for 
>details see the output below).

I'd suggest that you look at the recent threads about compiling for
HP-UX on python-dev.  It's starting to look like a SIG might be a good
way to go.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

A: No.
Q: Is top-posting okay?


From newsgroups at jhrothjr.com  Thu Jan 15 12:48:20 2004
From: newsgroups at jhrothjr.com (John Roth)
Date: Thu, 15 Jan 2004 12:48:20 -0500
Subject: TUPLE & LIST
References: <%7xNb.55$Uw3.50@newsr2.u-net.net>
Message-ID: <100dkld62mibs8a@news.supernews.com>


"Yomanium Yoth Taripo?t II" <Yomanium at Yomanium.com> wrote in message
news:%7xNb.55$Uw3.50 at newsr2.u-net.net...
> HI,
>
> 1) what are the differences between list and tuple?
> 2) how to concatenate tuple and list? no method, no op?rator?
> 3) im looking the manual, and can't add value in my tuple, when it
> already created :/
>   how to do it?

Tuples are intended to be a quick way of passing
around several heterogenous values. If you find
yourself wanting to do anything to a tuple other than
creating it and accessing members, then you're
trying to do too much. Use a list if the values
are of the same type, or create an object to
hold whatever it is.

John Roth



> thx.
>
>
>
>




From jepler at unpythonic.net  Wed Jan 28 18:47:54 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Wed, 28 Jan 2004 17:47:54 -0600
Subject: executing an external app
In-Reply-To: <101gae65oh6ig72@corp.supernews.com>
References: <Pine.GSO.4.58.0401281558280.26750@denali.ccs.neu.edu>
	<GJVRb.5895738$be.962461@news.easynews.com>
	<101gae65oh6ig72@corp.supernews.com>
Message-ID: <20040128234754.GA30934@unpythonic.net>

Jeff Epler wrote:
> >Look at os.spawn* or os.popen*
> 			.
> 			.
> 			.
On Wed, Jan 28, 2004 at 09:29:42PM -0000, Cameron Laird wrote:
> And os.system().  And commands.getoutput().

[jepler at parrot jepler]$ python -c 'import this' | grep "only one"
There should be one-- and preferably only one --obvious way to do it.

*sigh*

Jeff



From Bill.Scherer at verizonwireless.com  Thu Jan 22 07:49:15 2004
From: Bill.Scherer at verizonwireless.com (Bill Scherer)
Date: Thu, 22 Jan 2004 07:49:15 -0500
Subject: prog/lib to draw graphs
In-Reply-To: <buofpq$1ra$06$1@news.t-online.com>
References: <buofpq$1ra$06$1@news.t-online.com>
Message-ID: <400FC6CB.6080608@VerizonWireless.com>

[P&M]

Florian Lindner wrote:

>Hello,
>I'm looking for a program or python library to draw graphs.
>They should look like the that:
>
>
>/--------\                         /--------\
>| Node A | ------ belongs to ----> | Node B |
>\--------/                         \--------/
>

Florian -

Graphviz (http://www.graphviz.org) is a great package for drawing 
graphs.  It ouputs to many formats.  There is a python lib for it at 
http://www.freshports.org/graphics/py-graphviz/, but I have not used 
it.  It's easy enough to generate dot[1] code and call dot to generate 
the graph image, so that's what I usually do.

HTH,

Bill


1. 'dot' is one of the graphviz commands.

>Which is a result of the function call like that:
>
>connectNodes(firstNode, secondNode, description, lineStyle)
>connectNodes("Node A", "Node B", "belongs to", dashed)
>
>It should have a open scalable vector format as output (DVI, SVG, PDF, ...)
>and should be able to make automatic optimal placement of the items.
>Do you know something like that?
>Thx,
>Florian
>  
>




From michael at foord.net  Fri Jan 30 04:03:57 2004
From: michael at foord.net (Fuzzyman)
Date: 30 Jan 2004 01:03:57 -0800
Subject: Printing From Python
References: <8089854e.0401290555.501f0695@posting.google.com>
	<7jzahm2e.fsf@python.net>
Message-ID: <8089854e.0401300103.8d2a271@posting.google.com>

Thomas Heller <theller at python.net> wrote in message news:<7jzahm2e.fsf at python.net>...
> michael at foord.net (Fuzzyman) writes:
> 
> > I looked through the manual, I looked on the web and could find very
> > little on this subject....
> >
> > The closest I could find was :
> > http://www.faqts.com/knowledge_base/view.phtml/aid/4549.
> >
> > Saying that printing (to a printer :-) wasn't easy (at least on
> > windows - let alone *cross* platform) - and that was dated 2000.
> >
> > Oh and - http://mail.python.org/pipermail/python-list/2002-September/121462.html
> > from 2002 giving two different methods for Unix and Windows... the
> > windows one doesn't work across our network........
> 
> Although I am connected to a network printer, I have no problems opening
> lpt1:, write some data to it, and the printer prints it:
> 
> C:\>net use
> Neue Verbindungen werden gespeichert.
> 
> 
> Status       Lokal     Remote                    Netzwerk
> 
> -------------------------------------------------------------------------------
> [...]
> Getrennt     LPT1      \\server\lexmarkps        Microsoft Windows-Netzwerk
> Der Befehl wurde erfolgreich ausgef?hrt.
> 
> 
> C:\>copy con: lpt1:
> hello, world
> ^Z
>         1 Datei(en) kopiert.
> 
> C:\>
> 
> 
> Another thing that comes to mind is something like 'notepad /p x.txt'.
> 
> If you want to print other things than simple text files, it gets more
> complicated IMO.
> 
> Thomas


You mean python isn't capable of it ?

Fuzzy


From skip at pobox.com  Fri Jan 16 09:38:57 2004
From: skip at pobox.com (Skip Montanaro)
Date: Fri, 16 Jan 2004 08:38:57 -0600
Subject: SimpleXMLRPCServer
In-Reply-To: <YKNNb.213874$0P1.42736@twister.nyc.rr.com>
References: <YKNNb.213874$0P1.42736@twister.nyc.rr.com>
Message-ID: <16391.63361.420774.458069@montanaro.dyndns.org>


    Maxim> is there a way to process actions other than XML-RPC requests
    Maxim> using SimpleXMLRPCServer? Is is possible to do something like

    Maxim> server = SimpleXMLRPCServer(('', 8000))
    Maxim> server.register_instance(MyClass())
    Maxim> while(1)
    Maxim>  if(checkSomeCondidion()):
    Maxim>   server.serve_once()
    Maxim>  else: server.stop()

You should be able to override the serve_forever() method.

Skip



From cherico at bonbon.net  Thu Jan 29 08:11:13 2004
From: cherico at bonbon.net (cherico)
Date: 29 Jan 2004 05:11:13 -0800
Subject: popen2 with large input
Message-ID: <afc115ec.0401290511.3c3b2d40@posting.google.com>

from popen2 import popen2

r, w = popen2 ( 'tr "[A-Z]" "[a-z]"' )
w.write ( t ) # t is a text file of around 30k bytes
w.close ()
text = r.readlines ()
print text
r.close ()

This simple script halted on 

w.write ( t )

Anyone knows what the problem is?


From q2n8byu02 at sneakemail.com  Fri Jan  2 16:52:40 2004
From: q2n8byu02 at sneakemail.com (Ivan Nestlerode)
Date: 2 Jan 2004 13:52:40 -0800
Subject: KeyboardInterrupt and threading
Message-ID: <a6562e06.0401021352.65aac82b@posting.google.com>

Hello comp.lang.python,

I am attempting to write a threaded program right now in Python
(version 2.3 on Debian unstable) and the current behavior of
KeyboardInterrupt is causing me grief. From the documentation of the
thread module in Python 2.3.3:

"Threads interact strangely with interrupts: the KeyboardInterrupt
exception will be received by an arbitrary thread. (When the signal
module is available, interrupts always go to the main thread.)"

So the current behavior is that some "arbitrarily chosen" thread
receives the KeyboardInterrupt exception when the user hits Ctrl-C. My
question is whether there is some way to always make the main thread
receive the KeyboardInterrupt. The snippet at the end of the
documentation is vague/confusing. It sounds like KeyboardInterrupt
would always be delivered to the main thread, but I have tested this
and it is definitely not behaving that way. Maybe it just means that
the Unix signal is received by the main thread's signal handler (and
at that point an arbitrary thread is picked for KeyboardInterrupt). I
don't know.

The reason I cannot use the current "arbitrary thread"
KeyboardInterrupt delivery model:

The current model seems to deliver the KeyboardInterrupt to the
busiest thread (i.e. some sub-thread doing lots of computation, as
opposed to my main thread that is sitting in a sleep() loop). This
causes problems because the busy thread that I spawn runs library code
that was not written by me. That library code may contain lines like
"except:" that mask the KeyboardInterrupt so that the user experience
is that the app seems to ignore Ctrl-C.

If I could guarantee delivery of KeyboardInterrupt to the main thread,
I could control things much more easily/consistently. With the current
semantics code reuse becomes very difficult (I cannot use any code
that is "sloppy" with its exception catching or Ctrl-C will be
ignored).

Any ideas (besides rewriting the sloppy library code) would be much
appreciated.

Thanks,
-Ivan


From na  Sat Jan 10 10:17:43 2004
From: na (Andrew)
Date: Sat, 10 Jan 2004 07:17:43 -0800
Subject: How to insert into listbox using wxPython
References: <vvr25kjnd5n397@corp.supernews.com>
	<3ffda907$0$572$b45e6eb0@senator-bedfellow.mit.edu>
	<vvrec7d5bs4ve6@corp.supernews.com>
	<p2yLb.5996$5V2.10467@attbi_s53>
Message-ID: <vvthjc3ta6lme1@corp.supernews.com>

Hi I had tried something similiar to that earlier.

I typed what you wrote

for x in self.results:
    self.listbox.Append(x[0])

and I got the same error as what I had tried earlier

Traceback (most recent call last):
  File "S:\GUI\MYSQL\mysqlgui.py", line 65, in OnB2Button
    self.listbox.Append(x[0])
  File "F:\Python22\Lib\site-packages\wxPython\controls.py", line 78, in
Append
    val = controlsc.wxControlWithItems_Append(self, *_args, **_kwargs)
TypeError: String or Unicode type required

Any help is alway's appreciated





From computer.problemen at skynet.be  Fri Jan  9 03:53:22 2004
From: computer.problemen at skynet.be (broebel)
Date: Fri, 9 Jan 2004 09:53:22 +0100
Subject: python newbie
References: <3ffddcfd$0$16662$ba620e4c@news.skynet.be>
	<5unrvv8u1vpske1j464epj4aff0f54k2nf@4ax.com>
Message-ID: <3ffe6a41$0$1820$ba620e4c@news.skynet.be>

thanks

"Rene Pijlman" <reply.in.the.newsgroup at my.address.is.invalid> schreef in
bericht news:5unrvv8u1vpske1j464epj4aff0f54k2nf at 4ax.com...
> broebel:
> >first problem is the fact that I started out with a little program who
was
> >part of a course but the problem is when I launch the program. I don't
have
> >the time to see the result because the screen closes immediately.
> >Can anyone explain what's happening.
>
> The program started, did what it had to do and then terminated :-)
>
> "1   How do I run a Python program under Windows?"
>
http://www.python.org/doc/faq/windows.html#how-do-i-run-a-python-program-und
er-windows
>
> --
> Ren? Pijlman




From rob02omni at vodafone.it  Thu Jan 15 04:53:39 2004
From: rob02omni at vodafone.it (Roberto)
Date: Thu, 15 Jan 2004 10:53:39 +0100
Subject: How robust  is embedding??
Message-ID: <bu5ngq$2im$1@fata.cs.interbusiness.it>

Hi there,
I know that surely depend on how robust is my script just wondering if
anyone is using this in production.

Thanks,
Rob

-- 
Roberto Federici

.:: SAEC - Studio Associato Enrico e Catozzo & C.
.:::: Fraz. Pont Suaz, 104 Charvensod (AO)
.:::::: Tel. 0165-43149 - Fax 0165-230153
.:::::::: info at saec.net www.saec.net

**********************************************************************
Ai sensi della legge n. 675/1996 si informa che :

Questa email (e relativi allegati) contiene informazioni riservate
indirizzate ai soli destinatari.
E' fatto esplicito divieto di utilizzare i contenuti per qualsiasi scopo.
E' fatto altres? divieto di utilizzare gli indirizzi email per attivit?
indesiderate e/o non richieste (spamming).

In caso di ricevimento per errore vi preghiamo di segnalarlo a info at saec.net
**********************************************************************




From aldo123 at onet.pl  Fri Jan 23 08:43:49 2004
From: aldo123 at onet.pl (mic)
Date: Fri, 23 Jan 2004 14:43:49 +0100
Subject: weird COM hazard
Message-ID: <bur8es$17af$1@news.atman.pl>

I'm getting strange hazard while running MSIE automation script. This
concerns MSIE events, especially OnDownloadBegin and OnClosing but I bet
they're not the only ones. The simplified code looks like this:

from win32com.client import DispatchWithEvents

class ConnectionStatus: #this is 'static' class containing most of the
parameters needed from other parts of the script
    MainBusy = False
    ChildBusy = False

class MSIE:
    Main = DispatchWithEvents('InternetExplorer.Application',MainEvents)
    Child = DispatchWithEvents('InternetExplorer.Application',ChildEvents)
"""
    then I do some browsing on 'Main' here, especially to the page that
fires using JavaScript new window,
    that's being captured by Child object. Then the Child window is closed
by using JS window.close()
"""

class MainEvents:
    def OnDownloadBegin(self):
            ConnectionStatus.MainBusy = True

    def OnDocumentComplete(self):
            ConnectionStatus.MainBusy = True
"""
this way I catch most of the available events. The only operation I do is
set the ConnectionStatus class attributes
The same goes to ChildEvents:
"""
class ChildEvents:
    def OnDownloadBegin(self):
            ConnectionStatus.ChildBusy = True

    def OnDocumentComplete(self):
            ConnectionStatus.ChildBusy = True

The problem is that from time to time some of the child events raises
exception:

AttributeError: 'NoneType' object has no attribute 'ChildBusy'

and after a short debugging it looks like at some moment I loose the
reference to the ConnectionStatus class, though obviously I make no such
operation at all. As it happens 50% of times I run the same script and seems
to stop not only at the same event, I'm starting to believe that this is
kind of a bug in win32com. Does anybody experienced anything like that?

Thanks in advance,

Michal




From peter at engcorp.com  Fri Jan  9 14:47:36 2004
From: peter at engcorp.com (Peter Hansen)
Date: Fri, 09 Jan 2004 14:47:36 -0500
Subject: Variable Scope
References: <dcde6f.0401091107.45d464eb@posting.google.com>
Message-ID: <3FFF0558.52C2892F@engcorp.com>

Jens Thiede wrote:
> 
> In the following terminal; could someone inform me as to why it is
> posible to print a global variable without having to declare it using
> global. This has affected some source of mine, and allows you to
> modify a global in a local scope *without* the global keyword, for
> instance, you can append to a global list, but *not* assign it a new
> value, for then, you create a new local variable. -- Why.

Have you read http://www.python.org/doc/faq/programming.html#how-do-you-set-a-global-variable-in-a-function ?

It should clarify some of these issues.  If it does not, please let us
know what's still unclear and the FAQ can be improved.

-Peter


From rdsteph at earthlink.net  Mon Jan  5 14:04:58 2004
From: rdsteph at earthlink.net (Ron Stephens)
Date: 5 Jan 2004 11:04:58 -0800
Subject: Help: wxPython tutorials
References: <425cc8d1.0401050434.235ca633@posting.google.com>
Message-ID: <8e6e8e5d.0401051104.225aeece@posting.google.com>

mir4uu at yahoo.com (mir nazim) wrote in message news:<425cc8d1.0401050434.235ca633 at posting.google.com>...
> hi,
> i am in urgent need of a good refrence material for wxPython. goo docs
> will also do.(i already have wxWindows library refrence. but it is too
> hectic for me to traverse throught it).
> please help.
  Try these:

<a href="http://wxpython.org/tutorial.php">wxPython</a><BR>
Tutorial on wxPython
<BR><BR>

 
 <a href="
http://www-106.ibm.com/developerworks/library/l-wxpy/index.html">wxPython
for Newbies</a><BR>
Tutorial on wxPython
<
 <a href="
http://wiki.wxpython.org/index.cgi/SmallApp">wxPython Small App
Tutorial</a><BR>
Tutorial on wxPython

 <a href="
http://wiki.wxpython.org/index.cgi/FrontPage">wxPython Wiki</a>

Ron Stephens


From ykingma at accessforall.nl  Tue Jan  6 03:41:20 2004
From: ykingma at accessforall.nl (Ype Kingma)
Date: Tue, 06 Jan 2004 09:41:20 +0100
Subject: Scoped Lock
References: <bt9ovs$p92$1@graf.cs.uni-magdeburg.de>
	<3ff8a259$0$121$e4fe514c@dreader10.news.xs4all.nl>
	<m37k06720b.fsf@pc150.maths.bris.ac.uk>
	<DLydnb9wQ6sblGeiRVn-vA@speakeasy.net>
Message-ID: <3ffa7431$0$141$e4fe514c@dreader12.news.xs4all.nl>

Sean R. Lynch wrote:

> How about:
> 
> def lock_call(mutex, func, *args, **kwargs):
>      mutex.acquire()
>      try:
>          res = func(*args, **kwargs)
>      finally:
>          mutex.release()
> 
>      return res

Or even:

def lock_call(mutex, func, *args, **kwargs):
     mutex.acquire()
     try:
         return func(*args, **kwargs)
     finally:
         mutex.release()

Regards,
Ype



From exarkun at intarweb.us  Tue Jan  6 11:02:02 2004
From: exarkun at intarweb.us (Jp Calderone)
Date: Tue, 6 Jan 2004 11:02:02 -0500
Subject: metadocumentation (keyword help)
In-Reply-To: <tyfn091gnk5.fsf@pcepsft001.cern.ch>
References: <tyfn091gnk5.fsf@pcepsft001.cern.ch>
Message-ID: <20040106160202.GA8085@intarweb.us>

On Tue, Jan 06, 2004 at 03:27:06PM +0100, Jacek Generowicz wrote:
> Where can I find concise, clear documentation[*] describing what one has
> to do in order to enable Python's internal help to be able to provide
> descriptions of Python keywords ?

  "Quote them"

  help('if')

  Jp




From aahz at pythoncraft.com  Tue Jan 20 13:26:16 2004
From: aahz at pythoncraft.com (Aahz)
Date: 20 Jan 2004 13:26:16 -0500
Subject: Delayed evaluation and setdefault()
References: <buh6j1$bub$1@news.tudelft.nl> <400C25FF.A76B1FEA@engcorp.com>
	<buhchh$43f$1@panix1.panix.com> <400D5B48.9F69A788@engcorp.com>
Message-ID: <bujrs8$120$1@panix1.panix.com>

In article <400D5B48.9F69A788 at engcorp.com>,
Peter Hansen  <peter at engcorp.com> wrote:
>Aahz wrote:
>> 
>> First of all, Peter made a boo-boo in naming a parameter ``dict``.
>
>Oops...  I was, uh, writing pseudo-code, not Python!  Yeah, that's it...

Python *is* pseudo-code.  That's why we like it, right?
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

A: No.
Q: Is top-posting okay?


From stevewilliams at wwc.com  Fri Jan 16 22:46:15 2004
From: stevewilliams at wwc.com (Steve Williams)
Date: Sat, 17 Jan 2004 03:46:15 GMT
Subject: [OT] AS/400
In-Reply-To: <4005cd03@news.mt.net.mk>
References: <mailman.352.1074092092.12720.python-list@python.org>
	<bu4a5n$k9$6@atlantis.news.tpi.pl> <4005cd03@news.mt.net.mk>
Message-ID: <be2Ob.4256$ko5.1316@nwrddc01.gnilink.net>

?????? ?. wrote:
>>(will not mention that it works on AS/400, the best
>>minicomputer(!) ever made).
> 
> 
> Why is it the best minicomputer ever made?
> I really want to know!
> 
> 
HP/3000, taken off the sales list last Halloween.

A joy to work with.

Believe it or not, it was ported to run as a UNIX emulator in the '80s, 
so it could be available forever, but HP's politics killed it.

Gresham's law applied to computing:  bad software drives out good. 
(Perl vs Python, et cetera, et cetera).







From cpl.19.ghum at spamgourmet.com  Fri Jan 30 03:06:37 2004
From: cpl.19.ghum at spamgourmet.com (Harald Massa)
Date: Fri, 30 Jan 2004 09:06:37 +0100
Subject: Printing From Python
References: <8089854e.0401290555.501f0695@posting.google.com>
Message-ID: <Xns94805E101708Dcpl19ghumspamgourmet@62.153.159.134>

> Saying that printing (to a printer :-) wasn't easy (at least on
> windows - let alone *cross* platform) - and that was dated 2000.

Printing is not easy, it is a complicated matter.

You can find 4 simplifications:

1) wxPython has a print-framework, wxPython is cross platform (alas, I only 
used it in win32)

2) print postscript. Ghostscript is available on "every" platform. 
(printing on PDAs and watches is  really different). Postscript is 
documented

3) create PDF. PDF viewers & printers are available on "every" platform.
PDF can be created by (free) ReportLab toolkit, and I'm sure there are more 
PDF-Classes

4) create XHTML & a Print.CSS. HTML viewers are available on every 
Plattform, .CSS allows fairly good styling of printouts.


Harald


From dlmurray at micro-net.com  Tue Jan  6 23:06:20 2004
From: dlmurray at micro-net.com (Dave Murray)
Date: Tue, 6 Jan 2004 21:06:20 -0700
Subject: My Bad!
Message-ID: <vvn1dtr2nq5i66@corp.supernews.com>

Well, I stopped my headlong charge into learning by reinventing the wheel
(took the advice from this forum) and started snooping around to see what
was provided with the python package. Good grief! And it's free! Thanks for
the advice. Just had to say that.

Dave




From dpharris76 at msn.com  Thu Jan  1 17:48:06 2004
From: dpharris76 at msn.com (Dave Harris)
Date: Thu, 1 Jan 2004 16:48:06 -0600
Subject: Test if IDLE is a mature program
References: <ppKdnTEKUp3Hr2-iRVn-jg@comcast.com><7ti4vvoburp4k4o4a0v5p4shae7o5uhotb@4ax.com><edqdnVxBL_Q3fG-iRVn-gg@comcast.com><99dce321.0312311130.5b7c7c8a@posting.google.com><N6OdndTvJqSstW6iRVn-gg@comcast.com>
	<3ff49f0e.776954150@news.blueyonder.co.uk>
Message-ID: <BAY3-DAV141tt1fS16i00047397@hotmail.com>




----- Original Message ----- 
From: "Alan Gauld" <alan.gauld at btinternet.com>
Newsgroups: comp.lang.python
To: <python-list at python.org>
Sent: Thursday, January 01, 2004 4:34 PM
Subject: Re: Test if IDLE is a mature program


> On Wed, 31 Dec 2003 14:48:59 -0500, "Aubrey Hutchison"
> <abhjrpe at comcast.net> wrote:
> > I understand the problem of using the names of common modules...
> > 
> > But why do we need to work around that problem..
> 
> 
> However your test of maturity is completely bogus, it is an issue
> of user error not IDLE error. How do you think IDLE should handle
> the case you describe? How would it know whether you intended a
> name clash or not?
> 

The word 'test' has appeared so many times in this thread that I have to
mention a name conflict that has to have bitten _every_ UNIX shell
scripter. How many of you will fess up to have written a script named
'test' and were puzzled when it did not run??

UNIX and sh fail to be mature by the proposed measure. How much longer till
they 'come of age'?

Anecdotally,
Dave Harris



From Pieter.Claerhout at Creo.com  Tue Jan 20 06:00:34 2004
From: Pieter.Claerhout at Creo.com (Pieter Claerhout)
Date: Tue, 20 Jan 2004 12:00:34 +0100
Subject: Python database
Message-ID: <490316A24CC5D411ACD700B0D078F7F003915DC1@cseexch01.cse.creoscitex.com>

Have a look at SQLite: www.sqlite.org.

pieter

Creo
pieter claerhout | product support prinergy | tel: +32 2 352 2511 |
pieter.claerhout at creo.com | www.creo.com

IMAGINE CREATE BELIEVE(tm)


-----Original Message-----
From: brice.vissiere at costes-gestion.net
[mailto:brice.vissiere at costes-gestion.net] 
Sent: 20 January 2004 11:46
To: python-list at python.org
Subject: Python database


Hi python friends,

I'm currently working on a data handling tool.

For internal storage, I'm looking for a 100% python database.

I have some constraints:
 + multi-platform
 + relational with built-in query system (SQL preferably)
 + built-in string functions
 + reliable
 + fast

I don't care about:
 + network access
 + concurracy control
 + transaction commit/rollback

One of the key feature I'm looking for is direct string handling in
queries: concatenation, substring extraction, stripping, justifying,
... all we can do with python strings.

My first thought was to use Gadfly. I've downloaded and installed it.
Now, I'm  investigating the documentation and examples to find string
capabilities of Gadfly, but at first look, it seems that it will not
fit to my needs.

My problem would be solved by using a database allowing user function
creation, but I don't know whether such a tool exists.

So, have you any idea of a db tool I should use ?

Thanks in advance.

Brice
-- 
http://mail.python.org/mailman/listinfo/python-list



From http  Fri Jan 23 00:06:32 2004
From: http (Paul Rubin)
Date: 22 Jan 2004 21:06:32 -0800
Subject: cgi concurrency approaches?
Message-ID: <7x7jzjgso7.fsf@ruckus.brouhaha.com>

I'm wondering if folks here have favorite lightweight ways of dealing
with concurrency in cgi's.  Take a simple case:

You want to write a cgi that implements a simple counter.  The first
time it's called, it prints "1".  The next time, "2", etc.  The naive
implementation looks something like:

   fd = open("counter.num", "rw")
   n = int(fd.read())
   fd.seek(0, 0)
   fd.write("%d"% n+1)
   print "Content-type: text/html\n\n"
   print n

but of course there's the obvious race condition if two people hit the
cgi at the same time.

Fancier solutions include running an transactional database in another
process and connecting to it, setting up a daemon that remembers the
counter value in memory and serializes access through a socket that
the cgi opens, using a file-system specific hack like linking to
counter file to lock it, having a timeout/retry if the counter is
locked, with a possible hangup if a lock file gets left around by
accident, etc.  Each is a big pain in the neck.

Anyone have some simpler approaches?


From brian.c.fagan at boeing.com  Mon Jan 26 17:41:09 2004
From: brian.c.fagan at boeing.com (brian.c.fagan at boeing.com)
Date: Mon, 26 Jan 2004 14:41:09 -0800
Subject: hello
Message-ID: <200401262240.i0QMepd28060@smtp.bss.boeing.com>

------------------  Virus Warning Message (on slb-av-02)

Found virus WORM_MIMAIL.R in file text.pif (in text.zip)
The uncleanable file text.zip is moved to /quarantine/virWLW8TeOPU.

An attachment to this email contained a virus, if you received the attachment, the virus was cleaned and no further action is necessary. If you did not receive the attachment, you should contact the sender to have them clean the file and resend it. If you have further questions, contact your computer support staff.

---------------------------------------------------------
-------------- next part --------------
The message cannot be represented in 7-bit ASCII encoding and has been sent as a binary attachment.

-------------- next part --------------

------------------  Virus Warning Message (on slb-av-02)

text.zip is removed from here because it contains a virus.

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

From tjreedy at udel.edu  Fri Jan 16 15:24:46 2004
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 16 Jan 2004 15:24:46 -0500
Subject: Bug or feature?
References: <bu58st$1ha3$1@news.rtcomm.ru>
	<3dtid1-594.ln1@beastie.ix.netcom.com>
	<ZvidncM7G8svuZrdRVn-jA@comcast.com> <bu8t4h$15d$1@news.rtcomm.ru>
	<3bhld1-914.ln1@beastie.ix.netcom.com>
Message-ID: <gb2dnceMVNUe1ZXdRVn-sA@comcast.com>


"Dennis Lee Bieber" <wlfraed at ix.netcom.com> wrote in message
news:3bhld1-914.ln1 at beastie.ix.netcom.com...
>         But, since Python is dynamically typed, reversing the evaluation
order
> could have major effects on other operations... The "problem" is not
> the order of evaluation, but that you have a "hidden" modification to a
> term occurring.
>
> >>> def se(a):                  #side-effect
> ...     a.insert(0,3)
> ...     return a
> ...
> >>> def nose(a):                #no side-effect
> ...     a = [3] + list(a)
> ...     return a
> ...
> >>> l = [1,5,7]
> >>> l += nose(l)
> >>> l
> [1, 5, 7, 3, 1, 5, 7]
> >>> l = [1,5,7]
> >>> l += se(l)
> >>> l
> [3, 1, 5, 7, 3, 1, 5, 7]

Lovely example, no hypotheticals needed.

For those who did not get it, the key is that Python expressions evaluate
to objects, and that the + operator does not reach into the objects to pull
out values for the new object until it has (references to) both objects,
which in the second case, are both the same.

Terry J. Reedy




From mhammond at skippinet.com.au  Tue Jan 27 17:25:01 2004
From: mhammond at skippinet.com.au (Mark Hammond)
Date: Wed, 28 Jan 2004 09:25:01 +1100
Subject: Optional Parameters in python COM
In-Reply-To: <bv1rek$oof$1@lust.ihug.co.nz>
References: <bv1rek$oof$1@lust.ihug.co.nz>
Message-ID: <bv6og2$7il$1@arachne.labyrinth.net.au>

Rane Bowen wrote:

> Hi,
> 
> I am using python with a makepy generated wrapper on a COM application. One
> of this object's methods has 3 parameters, two of which are optional.
> If I call the method with just the non-optional parameter, or all three
> parameters, it works.  If I call it with the first two parameters, I get the
> following error:
> 
> (-2147352567, 'Exception occurred.', (0, 'Amphora.Session.1', 'A bad
> parameter was passed to the method', None, 0, -1610547133), None)
> 
> I have tried calling the method by using the names of the optional
> parameters, and I have also tried using pythoncom.Missing and
> pythoncom.Empty for the non essential parameter.  I have also edited the
> generated .py file so that it contains the following:
> 
> defaultNamedOptArg=pythoncom.Empty
> defaultNamedNotOptArg=pythoncom.Empty
> defaultUnnamedArg=pythoncom.Empty
> 
> But this has not made any difference!  Any help would be very much
> appreciated.

Can you reproduce this problem with a "common" object, such as IE, 
MSOffice, or a trivial VB object with sourcecode?  The problem is that 
it is up to each object to implement optional params, so it is very hard 
to pinpoint bugs in win32com here.

Mark.



From tr at jotsite.com  Mon Jan 26 10:58:36 2004
From: tr at jotsite.com (Hoang)
Date: Mon, 26 Jan 2004 15:58:36 GMT
Subject: Unique ID for CD or DVD
References: <69TQb.15674$Le1.6291@newssvr27.news.prodigy.com>
Message-ID: <MOaRb.15998$PD3.2974@newssvr27.news.prodigy.com>

thanks everyone for your suggestions.  I have decided to use MD5 since it is
included as a module with Python.  Finding a unique string from the CD won't
be that hard and makes the approach more straight forward than any other
method.  Using MD5 makes it less proprietary than it needs to be.

Hoang Do
http://jotsite.com




From jcarlson at nospam.uci.edu  Sun Jan 25 01:38:41 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Sat, 24 Jan 2004 22:38:41 -0800
Subject: Newbie Nested Function Problem
In-Reply-To: <PxHQb.43576$Fe1.27129@twister.nyroc.rr.com>
References: <O4GQb.12838$Tk3.10642@twister.nyroc.rr.com>
	<mailman.753.1075001453.12720.python-list@python.org>
	<PxHQb.43576$Fe1.27129@twister.nyroc.rr.com>
Message-ID: <buvodg$r3o$1@news.service.uci.edu>

Brian Samek wrote:

> Oh wow!  Thanks a lot - that was exactly the issue.  I changed the variable name and the program works perfectly now.  I didn't realize that a variable name in a program would have that effect.
> 
> Brian
>   "Rich Krauter" <rmkrauter at yahoo.com> wrote in message news:mailman.753.1075001453.12720.python-list at python.org...
>   Looks like you are setting the variable 'leave' to the user input, and then you are calling the function leave(), but remember that 'leave' has been set to some string.
>   So say you enter 'xqz', and expect it to restart the loop when you get to the leave call --- well, what you are doing is trying to call the function xqz().
>   Rich
>   On Sat, 2004-01-24 at 21:45, Brian Samek wrote: 

One thing you should REALLY change is the way you get the number.  For 
general inputs, you need to deal with the fact that people may give bad 
input.

try:
     number = int(raw_input('prompt> '))
except KeyboardInterrupt:
     #ctrl+c was pressed
     return
except:
     #they didn't enter a number
     pass

input(<prompt>)
Will evaluate some things that are entered by the user.


Below is a non-recursive version of what you wrote, which is not limited 
by the recursion limit of Python, so technically the upper bound can be 
tossed.  It also uses a controlled infinite loop trick that I've found 
quite useful in a few projects.

  - Josiah

def countdown():
     while 1:
         try:
             number = int(raw_input("Please enter a number.\n> "))
             if 1 <= number < 500:
		break
         except KeyboardInterrupt:
             return 0
         except:
             pass
     while number > 0:
         print number
         number -= 1
     while 1:
         leave = raw_input("Type 'y' to start over - type 'n' to exit. ")
         if leave == 'y':
             return 1
         elif leave == 'n':
             return 0
         else:
             print "Type either 'y' or 'n' please."

while countdown():
     pass


From http  Sat Jan 17 23:09:27 2004
From: http (Paul Rubin)
Date: 17 Jan 2004 20:09:27 -0800
Subject: Inserting while itterating
References: <pan.2004.01.14.08.43.00.894047@thomas-guettler.de>
	<pan.2004.01.17.22.30.26.454869@jerf.org>
Message-ID: <7xektxx5hk.fsf@ruckus.brouhaha.com>

Jeremy Bowers <jerf at jerf.org> writes:
> Actually, maximal readability is
> 
> l[:] = [x for x in range(min(l), max(l) + 1)]
> 
> but that will *certainly* be less efficient if you know the list is sorted
> then my first post.

Um, why the list comprehension?  Something wrong with

  l[:] = range(min(l), max(l) + 1)

?


From corey.coughlin at attbi.com  Fri Jan 30 17:26:15 2004
From: corey.coughlin at attbi.com (Corey Coughlin)
Date: 30 Jan 2004 14:26:15 -0800
Subject: number of arguments a function takes
References: <CSaSb.329909$ts4.189798@pd7tw3no>
	<Xns947FAE6461014duncanrcpcouk@127.0.0.1>
	<YVbSb.319671$JQ1.192347@pd7tw1no>
	<a8623416.0401291606.1fa4de31@posting.google.com>
	<g5iSb.334469$ts4.14885@pd7tw3no>
Message-ID: <a8623416.0401301426.6cf14a62@posting.google.com>

OK, here's my object.  Basically, you set up a truth table with the
input and output pins, then you can add values to it usings
dictionaries of the form { 'pin name': 0 or 1......} to represent each
state.  The point here is more to deduce the boolean functions of a
table from data observed from black box boolean functions, very useful
for my job in semiconductors.  Keep in mind that I wasn't exactly
trained in software, so my code is usually a little rough and brute
force, which keeps it from being less elegant, but easy to understand.
 Anyway, if you have any questions, feel free to ask.

class TruthTable(object):
    def __init__(self,iinputs= [], ioutputs=[]):
        self.ttab = {}
        self.inpindex = {}
        self.vcount = 0
        if iinputs and ioutputs:
            self.vcount = 2 ** len(iinputs)
            i = 1
            for input in iinputs:
                self.inpindex[input] = i
                i = i * 2
            for output in ioutputs:
                self.ttab[output] = [ None ] * self.vcount
    def reducetable(self):
        newinputs = []
        onegone = False
        for ipin in self.inpindex.keys():
            iused = False
            for opin in self.ttab.keys():
                iused = iused or self.findtransitions(ipin, opin)
            if iused:
                newinputs.append(ipin)
            else:
                onegone = True
        if not onegone:
            return None
        i = 1
        newindex = {}
        newttab = {}
        newcount = 2 ** len(newinputs)
        for ipin in newinputs:
            newindex[ipin] = i
            i = i * 2
        for opin in self.ttab.keys():
            newttab[opin] = [None] * newcount
        for i in range(newcount):
            curristate = {}
            for ipin, bplace in newindex.items():
                curristate[ipin] = ( i & bplace ) / bplace
            for j in range(self.vcount):
                oldstate = self.vec2output(j)
                matched = True
                for ipin in curristate:
                    matched = matched and curristate[ipin] ==
oldstate[ipin]
                if matched:
                    for opin in newttab:
                        newttab[opin][i] = oldstate[opin]
        self.ttab = newttab
        self.inpindex = newindex
        self.vcount = newcount
    def addvalues(self, ttentry):
        index = 0
        foundall = True
        for ipin in self.inpindex:
            if ipin not in ttentry:
                raise KeyError, 'Pin %s not in %s' % (ipin, ttentry)
            else:
                index = index + ttentry[ipin] * self.inpindex[ipin]
        for pin, value in ttentry.items():
            if pin in self.ttab:
                self.ttab[pin][index] = value
    def deloutput(self, outname):
        if self.ttab.has_key(outname):
            del self.ttab[outname]
    def vec2output(self, vec):
        outent = {}
        for input, binplace in self.inpindex.items():
            outent[input] = ( vec & binplace) / binplace
        for output, outvals in self.ttab.items():
            outent[output] = outvals[vec]
        return outent
    def getvalue(self, inpstate, opin):
        if opin not in self.ttab:
            raise IndexError, 'Incorrect output pin %s used in
getvalue.' % opin
        stindex = 0
        for ipin in self.inpindex:
            if ipin not in inpstate:
                raise KeyError, 'Pin %s cannot be found in inpstate
%s' % (ipin, inpstate)
            stindex = stindex + self.inpindex[ipin] * inpstate[ipin]
        return self.ttab[opin][stindex]
    def __str__(self):
        outs = ''
        allpins = self.inpindex.keys() + self.ttab.keys()
        maxname = 0
        for pin in allpins:
            if len(pin) > maxname:
                maxname = len(pin)
        if maxname < 5:
            maxname = 5
        indicies = self.inpindex.values()
        indicies.sort()
        indicies.reverse()
        indtoinp = {}
        inputs = []
        for input, index in self.inpindex.items():
            indtoinp[index] = input
        for i in indicies:
            outs = outs + '%s ' % stringfill(indtoinp[i], maxname)
            inputs.append(indtoinp[i])
        outs = outs + '| '
        outputs = self.ttab.keys()
        outputs.sort()
        for out in outputs:
            outs = outs + '%s ' % stringfill(out, maxname)
        outs = outs + '\n'
        for i in range(self.vcount):
            currvec = self.vec2output(i)
            for inp in inputs:
                outs = outs + '%s ' % stringfill(str(currvec[inp]),
maxname)
            outs = outs + '| '
            for out in outputs:
                outs = outs + '%s ' % stringfill(str(currvec[out]),
maxname)
            outs = outs + '\n'
        return outs
    def findtransitions(self, ipin, opin):
        indicies = range(self.vcount)
        binplace = self.inpindex[ipin]
        zerobits = filter(lambda x: x & binplace == 0, indicies)
        possibles = map(lambda x: ( x, x + binplace ), zerobits)
        foundtrans = []
        for lowbit, highbit in possibles:
            ovec = self.ttab[opin]
            if (ovec[lowbit] != ovec[highbit] and ovec[lowbit] in
[0,1] and
                ovec[highbit] in [0,1]):
                foundtrans.append( (lowbit, highbit) )
        foundtrans = map(lambda x: ( self.vec2output(x[0]),
                         self.vec2output(x[1]) ),
                         foundtrans)
        return foundtrans
    def getoutfunc2(self, opin, notxwhens = []):
        if opin not in self.ttab:
            return '',''
        relpins = []
        for ipin in self.inpindex.keys():
            tranpairs = self.alltransitions(ipin)
            for lowst, highst in tranpairs:
                if lowst[opin] != highst[opin] and ipin not in
relpins:
                    relpins.append(ipin)
        if relpins == []:
            return '',''
        outhighs = []
        outx = []
        allone = True
        for vec in range(self.vcount):
            pvec = self.vec2output(vec)
            if pvec[opin] in  [1, 'X']:
                saveout = pvec[opin]
                for pin in pvec.keys():
                    a = pin in self.ttab
                    b = pin not in relpins
                    if a or b:
                        del pvec[pin]
                if len(pvec) > 0:
                    allone = False
                if saveout == 1 and pvec not in outhighs:
                    outhighs.append(pvec)
                if saveout == 'X' and pvec not in outx:
                    outx.append(pvec)
        outfunc = ''
        xfunc = ''
        if allone:
            return '1',''
        for cwhen in outhighs:
            pstring = WhenString(cwhen)
            if outfunc == '':
                outfunc = '(%s)' % pstring
            else:
                outfunc = '%s|(%s)' % (outfunc, pstring)
        if notxwhens:
            print 'finding badxwhens'
            badxwhens = []
            for cwhen in outx:
                for subwhen in notxwhens:
                    if DictIn(cwhen,subwhen):
                        badxwhens.append(cwhen)
                        break
            for bwhen in badxwhens:
                outx.remove(bwhen)
        for cwhen in outx:
            pstring = WhenString(cwhen)
            if xfunc == '':
                xfunc = '(%s)' % pstring
            else:
                xfunc = '%s|(%s)' % (xfunc, pstring)
        return outfunc, xfunc
    def alltransitions(self, ipin):
        indicies = range(self.vcount)
        binplace = self.inpindex[ipin]
        zerobits = filter(lambda x: x & binplace == 0, indicies)
        possibles = map(lambda x: ( x, x + binplace ), zerobits)
        foundtrans = []
        foundtrans = map(lambda x: ( self.vec2output(x[0]), 
                         self.vec2output(x[1]) ),
                         possibles)
        return foundtrans
    def getinputs(self):
        return self.inpindex.keys()
    def getoutputs(self):
        return self.ttab.keys()
    def __len__(self):
        return self.vcount

Oh, and a function called WhenString is also called, here's that:

def WhenString(statein):
    pstring = ''
    pinlist = statein.keys()
    pinlist.sort()
    for pin in pinlist:
        if pstring != '':           
            pstring = '%s&' % pstring
        if statein[pin] == 0:
            pstring = '%s!' % pstring
        if statein[pin] in [0, 1]:
            pstring = '%s%s' % (pstring, pin)
    if pstring and pstring[-1] in ['&', '!']:
        pstring = pstring[:-1]
    return pstring

I took out some comments and a couple of differential specific
functions to clear things up, and it's a little cluttered up with code
to check for 'X' states, but that's it.  Let me know what you think. 
:)


From max at alcyone.com  Wed Jan 14 02:15:42 2004
From: max at alcyone.com (Erik Max Francis)
Date: Tue, 13 Jan 2004 23:15:42 -0800
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
	<K_YMb.10994$9k7.204413@news.xtra.co.nz>
	<bu1qq3$cu440$1@ID-207230.news.uni-berlin.de>
	<n22Nb.11299$9k7.210522@news.xtra.co.nz>
	<bu2pgs$d123a$1@ID-207230.news.uni-berlin.de>
Message-ID: <4004EC9E.1E2E2893@alcyone.com>

"Brandon J. Van Every" wrote:

> I don't.  But that's not going to stop me from denigrating them for
> being
> incapable of fulfillng the kinds of projects I have in mind.

If you're saying that you've come to the realization that volunteer
programers on a project with which you only have a passing interest
won't follow your orders and do whatever you say, I'd say pointing that
out is less like "denigration" and more like "common goddamn sense."

There are plenty of things you can get out of starting, getting involved
with, and approaching open source projects.  A legion of personal
servants is not going to be one of them, and only a crass idiot would
think otherwise.

-- 
 __ Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
/  \ San Jose, CA, USA && 37 20 N 121 53 W && &tSftDotIotE
\__/ My heart is pure as the driven slush.
    -- Tallulah Bankhead


From danb_83 at yahoo.com  Tue Jan 27 15:31:38 2004
From: danb_83 at yahoo.com (Dan Bishop)
Date: 27 Jan 2004 12:31:38 -0800
Subject: print format for binary representation
References: <6f03c4a5.0401270700.713a73aa@posting.google.com>
Message-ID: <ad052e5c.0401271231.1a021e60@posting.google.com>

rimbalaya at yahoo.com (Rim) wrote in message news:<6f03c4a5.0401270700.713a73aa at posting.google.com>...
> Hi,
> 
> >>> print '%x' % 54
>  36
> >>> print '%b' % 54
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
> ValueError: unsupported format character 'b' (0x62) at index 1
> >>>
> 
> No formating string for binary? There %x for hex. Would %b make sense
> for bin? Is this worth a PEP?

Yes, it would.  No, it isn't.

What we really need is an inverse to the int constructor.  Something like:

def itoa(x, base=10):
   isNegative = x < 0
   if isNegative:
      x = -x
   digits = []
   while x > 0:
      x, lastDigit = divmod(x, base)
      digits.append('0123456789abcdefghijklmnopqrstuvwxyz'[lastDigit])
   if isNegative:
      digits.append('-')
   digits.reverse()
   return ''.join(digits)

> How do I get 00110110 printed instead of the traceback?

print itoa(54, 2).zfill(8)


From jjl at pobox.com  Wed Jan 28 19:27:02 2004
From: jjl at pobox.com (John J. Lee)
Date: 29 Jan 2004 00:27:02 +0000
Subject: Problem connecting to https using ZSI (openssl problem) -
	python2.3
References: <Pine.GSO.4.58.0401271908190.25634@flora01.slac.stanford.edu>
	<Pine.GSO.4.58.0401281001480.19505@flora03.slac.stanford.edu>
Message-ID: <87bronoazt.fsf@pobox.com>

Adil Hasan <hasan at slac.stanford.edu> writes:

>  Hello,
>        As a follow up to this. I noticed that the port that I was
>  contacting the server on was not correct. Now, I have moved forward
>  to an access denied message (I'll post that error in another news group).
[...]

You might have better luck using axis from Jython.  ZSI seems to be
fairly buggy (maybe that's not altogether fair: the protocols are
apparently still a bit dodgy too, so the fault could be partly be on
that end).  I had some success with axis and SOAP/WSDL.


John


From steve at ninereeds.fsnet.co.uk  Fri Jan 30 17:32:17 2004
From: steve at ninereeds.fsnet.co.uk (Stephen Horne)
Date: Fri, 30 Jan 2004 22:32:17 +0000
Subject: [Python-Dev] PEP 327: Decimal Data Type
References: <mailman.1041.1075475187.12720.python-list@python.org>
Message-ID: <0lml109r6n6esrk1ou0nncdp3od4fnebo9@4ax.com>

On Fri, 30 Jan 2004 07:06:21 -0800, Michael Chermside
<mcherm at mcherm.com> wrote:

>Facundo Batista writes:
>> I'm proud to announce that the PEP for Decimal Data Type is now published 
>>         http://www.python.org/peps/pep-0327.html 
>
>VERY nice work here.
>
>Here's my 2 cents:
>
>    (1) You propose conversion from floats via:
>      Decimal(1.1, 2) == Decimal('1.1')
>      Decimal(1.1, 16) == Decimal('1.1000000000000001')
>      Decimal(1.1) == Decimal('110000000000000008881784197001252...e-51')
>
>        I think that we'd do even better to ommit the second use. People who 
>really want to convert floats exactly can easily write "Decimal(1.1, 60)". But 
>hardly anyone wants to convert floats exactly, while lots of newbies would 
>forget to include the second parameter. I'd say just make Decimal(someFloat) 
>raise a TypeError with a helpful message about how you need that second 
>parameter when using floats.

Good point. A 'DecimalExact' or similar function could perhaps be
provided to replace the simple conversion when people have really
thought about it and do really want it.


-- 
Steve Horne

steve at ninereeds dot fsnet dot co dot uk


From newsgroups at jhrothjr.com  Sat Jan  3 17:19:10 2004
From: newsgroups at jhrothjr.com (John Roth)
Date: Sat, 3 Jan 2004 17:19:10 -0500
Subject: Creating a capabilities-based restricted execution system
References: <LmmdnUn4seDeGWuiXTWc-w@speakeasy.net>
	<vvdfljlg0gce9c@news.supernews.com>
	<9Jecnc6TZdy4lGqiXTWc-w@speakeasy.net>
Message-ID: <vveg0bb6is2f60@news.supernews.com>


"Sean R. Lynch" <seanl at chaosring.org> wrote in message
news:9Jecnc6TZdy4lGqiXTWc-w at speakeasy.net...
> John Roth wrote:
>
> > Yes,  you're missing something really obvious. Multi-level
> > security is a real difficult problem if you want to solve it
> > in a believable (that is, bullet-proof) fashion. The only way
> > I know of solving it is to provide separate execution
> > environments for the different privilege domains.
> > In the current Python structure, that means different
> > interpreters so that the object structures don't intermix.
>
> Hmmm, can you give me an example of a Python application that works this
> way? Zope seems to be doing fine using RestrictedPython.
> RestrictedPython is, in fact, an attempt to provide different execution
> environments within the same memory space, which is the whole point of
> my exercise. Now, I know that the lack of an example of insecurity is
> not proof of security, but can you think of a way to escape from
> RestrictedPython's environment? DoS is still possible, but as I'm not
> planning on using this for completely untrusted users, I'm not too
> concerned about that.

Restricted Python was withdrawn because of a number of
holes, of which new style classes were the last straw. I don't
know what the exact holes were.

Whether Zope security is subject to those holes is a question
I can't answer (and I don't find it all that interesting, anyway.)
The Restricted Execution environment's disabling access to
__dict__ seems a bit ham-handed, but I suspect that it was
simply the easiest way around one major difficulty. The Bastion
hook (which is what I believe Zope security is built on top of)
seems to be reasonably adequate. The rest of it probably
needs to be rethought.

John Roth







From shalabh at cafepy.com  Mon Jan 12 05:31:37 2004
From: shalabh at cafepy.com (Shalabh Chaturvedi)
Date: Mon, 12 Jan 2004 10:31:37 GMT
Subject: Article: The New Python - Part 1 - Types and Objects
Message-ID: <dIuMb.16$4l3.14@nwrddc02.gnilink.net>

Announcing the initial public draft of:

The New Python
Part 1 - Types and Objects

>From the abstract:

"Describes the different new-style objects, and how they are related in the
new Python world order (i.e. version 2.2 and up). The system is described
in a ground up fashion, with plenty of diagrams. The system described is
sometimes called the Python type system, or the object model."

and preface:

"To gain a better understanding of what <type 'object'> and <type 'type'>
are, how classes, built-in types and class instances are related, and where
metaclasses come from, I drew some paper diagrams while reading various
official documentation on the subject. This book is a collection of those
diagrams, accompanied by a portion of theory and examples."

One big html file:
http://www.cafepy.com/articles/python_types_and_objects
python_types_and_objects.html

Multiple small html files: 
http://www.cafepy.com/articles/python_types_and_objects/index.html

Feedback greatly appreciated! 

Please send comments, suggestions, questions and corrections to
shalabh at cafepy.com.

Thanks,
Shalabh Chaturvedi


From paulo.pinto at cern.ch  Wed Jan 28 04:53:29 2004
From: paulo.pinto at cern.ch (Paulo Pinto)
Date: Wed, 28 Jan 2004 10:53:29 +0100
Subject: package similar to XML::Simple
Message-ID: <bv80qq$kbg$1@sunnews.cern.ch>

Hi,


does anyone know of a Python package that
is able to load XML like the XML::Simple
Perl package does?

For those that don't know it, this package
maps the XML file to a dictionary.

Of course I can build such a package myself
but it would be better if it already exists :)

--
Paulo Pinto



From mickel at csc.fi  Fri Jan 23 02:10:26 2004
From: mickel at csc.fi (=?ISO-8859-1?Q?Mickel_Gr=F6nroos?=)
Date: Fri, 23 Jan 2004 09:10:26 +0200 (EET)
Subject: Accessing Microsoft Word from Python
Message-ID: <Pine.LNX.4.58.0401230909510.9379@sampo.csc.fi>

Hi!

I'm fiddling with Python for Windows (normally using Linux) and as a part
of that I want to try to make a simple word frequency list generator to be
used in conjunction with Microsoft Word. Does anybody have any good
pointers on where I can find information about accessing Word-documents
(or other Microsoft Office applications) from Python? To be more specific,
I want to be able to:

- get the text content of the full Word document
- define a callback in Python that is called every time a user enters a
character into the text of a Word document
- get the last two graphical word tokens before the current position of
the insertion cursor in the text of the Word document.

Cheers!

/Mickel

--
Mickel Gr?nroos, application specialist, linguistics, Research support, CSC
PL 405 (Tekniikantie 15 a D), 02101 Espoo, Finland, phone +358-9-4572237
CSC is the Finnish IT center for science, www.csc.fi



From premshree_python at yahoo.co.in  Mon Jan 12 15:00:25 2004
From: premshree_python at yahoo.co.in (=?iso-8859-1?q?Premshree=20Pillai?=)
Date: Mon, 12 Jan 2004 20:00:25 +0000 (GMT)
Subject: Using switches with exec?
In-Reply-To: <1005ufs36m9n5fd@corp.supernews.com>
Message-ID: <20040112200025.59595.qmail@web8311.mail.in.yahoo.com>

 --- Francis Avila <francisgavila at yahoo.com> wrote: >
Premshree Pillai wrote in message ...
> > --- "Diez B. Roggisch" <nospam-deets at web.de>
> wrote: >
> >> I need to run a Python program dynamically within
> >> > another program. I am using exec for the
> purpose.
> >> Is
> >> > there a way to pass parameter switches to exec?
> >>
> >> You can pass a globals-dictionary to exec, which
> can
> >> hold the switches
> >> values.
> >>
> >> Diez
> >> --
> >>
> http://mail.python.org/mailman/listinfo/python-list
> >
> >Could you please elucidate with a sample script.
> >Suppose I need to pass the switch "-w" to the
> >dynamically loaded code (using eval()/exec()).
> >Any help is appreciated.
> >
> >-Premshree
> >
> 
> What do you mean by a parameter switch?  You mean a
> command-line switch?
> 
> If this is what you mean, it seems you're mixing
> concepts.  If you run the
> Python program as an external program, just do so
> using os.system or
> os.popen or such--the fact that it's written in
> Python makes no difference,
> and exec/execfile is not involved. os.system('python
> mypythonprg -w'), for
> example.
> 
> If you want to have Python code from one program
> exposed to another, the
> best approach is to write a module which can be used
> either as a library or
> a stand-alone program.  The idiom is to put
> something like this:
> 
> if __name__ == '__main__': main()
> 
> at the bottom of your code.  When you run this file
> alone, main() will be
> executed; if you import the file, it won't be.
> 
> If you really need to execute external Python code
> internally (and it's very
> rare and special circumstances where you'd want to),
> use execfile().
> 
> Now, if you're using execfile, it is unlikely that
> the code you're running
> would use command line switches--this implies that
> it's a stand-alone
> program, in which case you should either be running
> it externally (as in
> first solution above) or importing it, and providing
> a mechanism to use it
> programmatically.  This is why I say you seem to be
> mixing concepts.
> 
> That said, command line arguments are available via
> sys.argv, and this is
> most likely how the external program accesses them. 
> You can modify sys.argv
> before execfile().
> 
> This, however, is a mess, because you clobber the
> global sys.argv of the
> original program.  You need to somehow redirect any
> access to sys.argv by
> the script.  You can do so like this:
> 
> >>> sys.argv
> ['']
> >>> class ShadowObject(object):
> ...     def __init__(self, shadowed, **override):
> ...         """Shadow attr access to shadowed with
> override."""
> ...         self.__dict__.update(override)
> ...         self.shadowed = shadowed
> ...     def __getattr__(self, attr):
> ...         """Called only if attr was not in
> override."""
> ...         return getattr(self.shadowed, attr)
> ...
> >>> exec '''print sys.argv          #We get the
> right one?
> ... print sys.getdefaultencoding()  #Make sure we're
> shadowing.
> ... sys.argv = sys.argv[-1:]        #Test
> reassignments.
> ... print sys.argv
> ... ''' in globals(), {'sys':ShadowObject(sys,
> argv=['progname','-w'])}
> ['progname', '-w']
> latin-1
> ['-w']
> >>> sys.argv # the real sys.argv is unchanged
> ['']
> 
> Don't do this.  It's almost certainly not the best
> way to do what you want.
> Why don't you tell us your broader task, and maybe
> we can suggest something
> more Pythonic?
> --
> Francis Avila
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list 

Hmm...maybe I should have been clearer.
What I need to do is run an external Python code from
within another program, and while doing so I need to
pas a switch (yes, like a command-line switch) to this
code; i.e., I need to open an external Py program from
within another Py program...

Hope I'm clear this time around...

-Premshree

________________________________________________________________________
Yahoo! India Mobile: Download the latest polyphonic ringtones.
Go to http://in.mobile.yahoo.com



From nuffsaid at phreaker.net  Sat Jan 17 17:31:59 2004
From: nuffsaid at phreaker.net (Nuff Said)
Date: Sat, 17 Jan 2004 23:31:59 +0100
Subject: wxwindows question
References: <mailman.320.1074000727.12720.python-list@python.org>
	<pan.2004.01.13.23.55.15.95014@phreaker.net>
	<pggid1-jb4.ln1@wintermute.g2ctech>
Message-ID: <pan.2004.01.17.22.31.58.284937@phreaker.net>

On Thu, 15 Jan 2004 11:17:45 -0200, Jorge Godoy wrote:

> On Tuesday 13 January 2004 21:55 Nuff Said wrote in
> <pan.2004.01.13.23.55.15.95014 at phreaker.net>:
>  
>> (Even some of the widgets in the wxpython demo crash on Linux;
>> and if you use wxpython with Unicode support, the situation gets
>> even worse. This might change in the near future, but right now,
>> wxpython is not stable enough on Linux IMHO.)
> 
> Which ones? And in which version of wxPython + wxGTK + Python? 
 
I use(d) wxPython 2.4.2.4 with Python 2.3.x on various Linux
systems (incl. SuSE and Fedora Core).

When I compiled wxPython with Unicode support, the demo either
did not work at all resp. every second or so widget crashed.

Without Unicode support, e.g. the StyledTextControl (Scintilla)
crashed whenever I tried to enter a 'special' character (i.e.
a character which is not a 7 bit ASCII character). The use of 
other widgets resulted in seg faults, too; but I do not remember 
exactly, which ones.

I tried to compile wxPython (resp. wxGTK) for GTK1 and GTK2; the
former seemed to be more stable (but looked awful).

After a week or two of testing, I gave up on wxPython (for the
moment). I wrote a lot of cross platform applications in Python
(together with C and, recently, C#) using Tkinter (resp. Tcl/Tk)
and pyGTK (resp. GTK+ for other languages) and never had such
problems. But both GUI toolkits lack some important widgets and
therefore I became interested in wxPython (though I don't like the
way I have to code in wxPython; but that's my personal problem :-)

Recently, I write a lot of web applications (whenever possible),
using good old CGIs, various frameworks and ASP.NET (with C#).
But my dream for Python would be a native GUI toolkit (and not
just a wrapper for something else which was not designed with
Python in mind).

Nuff



From martin at v.loewis.de  Sat Jan 17 19:46:54 2004
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 18 Jan 2004 01:46:54 +0100
Subject: Retrive unicode keys from the registry
In-Reply-To: <j7jOb.16549$Wa.4760@news-server.bigpond.net.au>
References: <brp3bzwj.fsf@python.net>
	<KSXNb.15179$Wa.2061@news-server.bigpond.net.au>
	<1xpzaa8i.fsf@python.net>
	<69ZNb.15222$Wa.2798@news-server.bigpond.net.au>
	<40086EE5.7020708@v.loewis.de>
	<j7jOb.16549$Wa.4760@news-server.bigpond.net.au>
Message-ID: <bucl20$qo3$03$1@news.t-online.com>

Neil Hodgson wrote:
>    The documentation for RegQueryValue says:
> """ Unicode: Implemented as Unicode and ANSI versions. Note that Unicode
> support on Windows Me/98/95 requires Microsoft Layer for Unicode. """

Too bad. Perhaps we should link Python with MSLU?

Regards,
Martin



From hwlgw at hotmail.com  Fri Jan  9 08:07:17 2004
From: hwlgw at hotmail.com (Will Stuyvesant)
Date: 9 Jan 2004 05:07:17 -0800
Subject: Bruce Eckel example / CGI server for localhost for Windows XP
	possible?
Message-ID: <cb035744.0401090507.2802a281@posting.google.com>

Bruce Eckel has a good article about using a browser as UI for
applications you write:

http://mindview.net/WebLog/log-0045

His example code is nice, he sets up a webserver *and is able to kill
it too via a HTML button*.  But his webserver does not do CGI.  I have
been trying to change the code with CGIHTTPRequestHandler and other
such things, I have also tried various "recipes" for CGI webservers,
but I can not get something that works well enough.  Could well be
that my poor programming skill is to blame here.  Especially handling
POST is important (if a user inputs a file via HTML <input type="file"
/> then you don't want the whole file in the URL location bar.  I have
a version that handles the first POST but crashes on subsequent POSTs.
 So now I just use the Apache CGi webserver, but this means that if I
want to give somebody else my CGI program they also have to install
Apache.

Is there anybody who can provide simple example code like found in
Fredrik Lundh's Python Standard Library book for setting up a CGI
server for localhost with Python?  Perhaps the examples that are
available work on linux, but not on my Windows XP laptop with Python
2.3.3: GET works and the first POST works too, subsequent POSTs crash.


From deets_noospaam at web.de  Wed Jan 14 14:27:06 2004
From: deets_noospaam at web.de (Diez B. Roggisch)
Date: Wed, 14 Jan 2004 20:27:06 +0100
Subject: Printing to console (No Scroll)
References: <mailman.365.1074103229.12720.python-list@python.org>
	<bu41k5$4in$00$2@news.t-online.com>
	<mailman.366.1074106671.12720.python-list@python.org>
Message-ID: <bu456a$89s$02$1@news.t-online.com>

Totte Karlsson wrote:

> Any alternatives to ncurses? It seems like a overkill for this...

Maybe you can use sys.stdout.write in conjunction with control-codes for
moving back the cursor to column one. But you'll have to lookup these for
yourself :)

Diez


From PeterAbel at gmx.net  Tue Jan  6 18:39:29 2004
From: PeterAbel at gmx.net (Peter Abel)
Date: 6 Jan 2004 15:39:29 -0800
Subject: looping to define a sequence of functions?
References: <T9EKb.23248$lo3.20297@newsread2.news.pas.earthlink.net>
Message-ID: <21064255.0401061539.43ca3c01@posting.google.com>

"r.e.s." <r.s at ZZmindspring.com> wrote in message news:<T9EKb.23248$lo3.20297 at newsread2.news.pas.earthlink.net>...
> Suppose we want to define ten functions such that the
> nth function of x simply returns x**n. Is there a way 
> to avoid explicitly writing ten function def's? (They 
> have to be ten distinct functions, not just a single 
> one like def f(n,x): return x**n.)
>  
> E.g., the following doesn't work:
> 
> f = {}
> for n in range(10):
>     def f[n](x):
>         return x**n
> 
> Thanks.

>>> # A parametric factory-function that returns 
>>> # a function depending on the parameter n
>>> def factory_function(n):
... 	def fn(x):
... 		return x**n
... 	return fn
... 
>>> # A list of ten different functions
>>> func_list=map(factory_function,range(10))
>>> # And an example of the result with x=2
>>> for i,func in zip(range(len(func_list)),func_list):
... 	print '%2d: %d' % (i,func(2))
... 
 0: 1
 1: 2
 2: 4
 3: 8
 4: 16
 5: 32
 6: 64
 7: 128
 8: 256
 9: 512
>>> 

Regards
Peter


From newsreply at transfertech.de  Thu Jan 29 08:44:56 2004
From: newsreply at transfertech.de (Axel Mittendorf)
Date: Thu, 29 Jan 2004 14:44:56 +0100
Subject: Rookie question about data types (hashtables)
References: <Xns947EF14E03FAEgeneralsteveperkins@130.133.1.4>
Message-ID: <bvb2i3$c3k$07$1@news.t-online.com>


"Steve D. Perkins" <dontwritesteve at hotmail.com> wrote:
> Hello all -
Hi

> when you type the letter "a" the box will contain all English words
> starting with the letter "a".  When you then type "n", the box will
> narrow further and contain all words starting with "an", etc... until

Maybe you could use a normal python dictionary (you call it hashtable).
Look at this script (You would need one dictionary for each direction.):

#!/usr/bin/python

# generate dictionaries (AKA hashtables).
# direction: English --> German
EN2DE = {}
# direction: German --> English
DE2EN = {}

# inserts a word and its translation into the dict d
def insertWord( d, key, val):
    # does the key exist
    if d.has_key( key):
        # yes
        d[ key].append( val)
    else:
        # no
        d[ key] = [val]

# returns a list words that begin with s
def getBeginWith( d, s):
    l =  s.__len__()
    res = []
    keys = d.keys()
    for k in keys:
        if k.__len__()>=l and k[:l] == s:
            # use "k[:l].lower() == s.lower()" to ignore case
            res.append( k)
    return res

# insert some entries
insertWord( EN2DE, "someword", "meaning 1")
insertWord( EN2DE, "someword", "meaning 2")
insertWord( EN2DE, "my_codingstyle", "evil")
insertWord( EN2DE, "son", "Sohn")
insertWord( EN2DE, "sunday", "Sonntag")
insertWord( EN2DE, "wednesday", "Mittwoch")
insertWord( EN2DE, "Weapon of mass destruction", "George Walker Bush")
insertWord( EN2DE, "sold", "verkauft")

# show that it works
print "all keys that begin with 'so': ", getBeginWith( EN2DE, "so")
print "translations for 'someword': ",  EN2DE['someword']

Instead of doing this you could maybe subclass UserList from the standard
library.
> Steve

HTH, Axel




From aahz at pythoncraft.com  Thu Jan  8 15:55:37 2004
From: aahz at pythoncraft.com (Aahz)
Date: 8 Jan 2004 15:55:37 -0500
Subject: OT: What is Mac OS X?
Message-ID: <btkg49$lh7$1@panix2.panix.com>

http://www.kernelthread.com/mac/osx/

Good technical summary for all the Macaholics here.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

A: No.
Q: Is top-posting okay?


From sross at connectmail.carleton.ca  Sat Jan  3 13:42:53 2004
From: sross at connectmail.carleton.ca (Sean Ross)
Date: Sat, 3 Jan 2004 13:42:53 -0500
Subject: Integer math question
References: <3987e01c.0401030832.114c6f2a@posting.google.com>
Message-ID: <11EJb.20461$Vl6.3782481@news20.bellglobal.com>

"Frank" <mersmann at szut.uni-bremen.de> wrote in message
news:3987e01c.0401030832.114c6f2a at posting.google.com...
> Hi,
>
> can anybody help with the following problem?
>
> In C++
>
> i = 5 / 10 and
> i = -5 / 10 both have the same result 0.
>
> In python
>
> i = 5 / 10 gives me 0 as expected, but
> i = -5 / 10 gives -1 as result.
>
> Is this a feature or a bug? I remember Delphi gave me the same result as
> C++.
>
> TIA,
> Frank


Using the division algorithm:

Let a,b be integers with b>0. Then there exist unique integers q and r such
that:

a = bq + r       and  0<=r<b       [1]

If we let a=5 and b=10, then a/b is represented by [1] as

a = bq + r
5 = (10) q + r

... skipping some steps, we find that q=0 and r=5
5 = 10(0) + 5
5 = 0 + 5
5 = 5
LHS = RHS

so, 5/10 = 0 in integer division (with no remainder).

Now, let a = -5 and b = 10

-5 = (10)q + r

If we have q = -1, then

-5 = (10)(-1) + r
-5 = -10 + r

Recall [1] above, 0 <= r < b.  r must be nonnegative.
In this case r=5,

-5 = -10 + 5
-5 = -5
LHS = RHS

So, q = -1, and r=5, in which case -5/10 = -1 in integer division (without
remainder).

Suppose we let q=0 for the second problem above. Then

-5 = (10)(0) + r
-5 = 0 + r
-5 = r
or
r = -5

But, by [1], r must be nonnegative. So, we have a contradiction. In which
case we can say that q cannot equal 0 in the algorithm above.

So, I suppose the answer to your question would be,

"This is a feature - Python does it properly, where the others do not."

HTH
Sean





From ferrell at diablotech.com  Tue Jan 13 12:28:59 2004
From: ferrell at diablotech.com (Robert Ferrell)
Date: 13 Jan 2004 09:28:59 -0800
Subject: Design Question
Message-ID: <73b00f0c.0401130928.595842c0@posting.google.com>

I have a question which is more about OO design than Python per se. 
I've noticed that a number of posters to this list have very good
suggestions for SE issues, so I'm hoping that someone will be able to
give me some guidance.

My question is about how to architect a class hierarchy where some
methods are nearly identical between a superclass and a subclass, but
differ slightly.  For example:

class Sup(object):
   def __init__(self):
      self.specialFlag = False
   def aMeth(self):
       <do some stuff>
       <if self.specialFlag, do a special thing>
       <do more stuff>

class Sub(Sup):
  def __init__(self):
    self.specialFlag = True

In this example, the method aMeth just checks for specialFlag, and if
it's True, does the special stuff required.

This allows me to share aMeth, and not have to duplicate code. 
However, this doesn't feel great to me because Sup has to know about
Sub in some fashion.  If later I add other subclasses with their own
special needs, the entanglement will just get worse.

An alternative I thought of was creating a module with helper
functions.  That module would contain a function which implements
whatever aMeth does, and knos about the special needs of Sub.  Both
Sup and Sub would invoke the helper method.  That allows me to share
code, avoids a direct dependency of Sup on Sub, but does add a new
module.

I'm guessing that there is some well known pattern that addresses this
issue, but I don't know what it is.  Does anyone have suggestions for
architecture that provides a good solution?

thanks,
-robert


From markus_wankus at hotmail.com  Wed Jan 21 13:18:28 2004
From: markus_wankus at hotmail.com (Markus Wankus)
Date: Wed, 21 Jan 2004 13:18:28 -0500
Subject: Help, *.CHM, etc -> *nix .chm viewer
References: <mailman.603.1074707333.12720.python-list@python.org>
Message-ID: <opr14042lu8cxiwf@news.packetworks.net>

On Wed, 21 Jan 2004 11:48:48 -0600, Christian Wilcox 
<cwilcox at etcconnect.com> wrote:

>> I wonder if anyone has written a cross-platform CHM decoder and browser
>> that has the help browser look & feel.  I can't find one, but it seems
>> that python would be a great language to make such a thing.  Maybe
>> I'll take a crack if it hasn't been done.  I like monolithic,
>> compressed help vs. a big directory full of html.
>
> http://xchm.sourceforge.net/
>
> Description from the page:
>
> xCHM is a .chm viewer for UNIX (Linux, *BSD, Solaris), written by Razvan 
> Cojocaru.
> Success stories of xCHM on Mac OS X have also been received, and 
> apparently xCHM even works if compiled under the Cygwin environment in 
> Windows.
>
> HTH
>
> Christian Wilcox
>

Doesn't wxPython/wxWindows include a cross-platform HTML-Help widget set?  
I'm pretty sure it did when I was playing with this, but it wasn't exposed 
in earlier versions, or you needed to get it out of CVS or something - 
which is why I went the .chm route.

Well, OK - I'll get off my lazy ass and check:

>>> from wxPython.wx import *
>>> from wxPython.html import *
>>> from wxPython.htmlhelp import *
>>> print dir(wxHtmlHelpController)
['AddBook', 'AddPendingEvent', 'Connect', 'Destroy', 'Disconnect', 
'Display', 'D
isplayContents', 'DisplayID', 'DisplayIndex', 'GetClassName', 
'GetEvtHandlerEnab
led', 'GetFrame', 'GetNextHandler', 'GetPreviousHandler', 'KeywordSearch', 
'Proc
essEvent', 'ReadCustomization', 'SetEvtHandlerEnabled', 'SetNextHandler', 
'SetPr
eviousHandler', 'SetTempDir', 'SetTitleFormat', 'UseConfig', 
'WriteCustomization
', '__del__', '__doc__', '__init__', '__module__', '__repr__', 
'_setOORInfo']
>>>


It seems to depend on importing in the above order.  I am running an older 
version of wx so it may be better in newer versions.

--
Markus


From paul at boddie.net  Fri Jan 16 06:31:32 2004
From: paul at boddie.net (Paul Boddie)
Date: 16 Jan 2004 03:31:32 -0800
Subject: More than one python in a linux
References: <m165fdbp4t.fsf@llcpxqy.lc.ehu.es>
Message-ID: <23891c90.0401160331.287648a@posting.google.com>

Zunbeltz Izaola <zunbeltz at wm.lc.ehu.es.XXX> wrote in message news:<m165fdbp4t.fsf at llcpxqy.lc.ehu.es>...
> Hi,
> 
> I've build and installed  python 2.2 and python2.3 in a linux box.

I think we need to know...

  * How you built those Python releases: compiled from source, used
    a source RPM or other source package, used a binary RPM or other
    binary package (which really isn't building, however).

  * What kind of Linux distribution you used and whether it had
    Python installed already.

> Now i want to install some packages (Numeric, wxPython and
> scipy). I've install Numeric and wxPython for python2.3 without
> problem (python2.3 setup.py install ... and so on). But when I try 
> 
> python2.2 setup.py install

[...]

> error: invalid Python installation: unable to open /usr/lib/python2.2/config/Makefile (No such file or directory)

This suggests that you don't have the development stuff installed for
that particular Python 2.2 installation. I note that /usr is the
prefix, meaning that either...

  * You built Python from source and specified /usr as the prefix
    instead of using the default /usr/local as prefix. This is
    unlikely as the Makefile would probably be where setup.py is
    looking.

  * You installed a package which put the installation in /usr
    (eg. /usr/bin/python2.2) but which didn't include the
    development stuff. That might mean that you need to find the
    corresponding "devel" package.

  * You already have /usr/bin/python2.2 installed as part of the
    Linux distribution and it is this program that is being run
    when you attempt to install things using setup.py, despite
    the possible existence of a Python 2.2 installation in
    /usr/local. In this case, verify using "which python2.2" the
    actual program being run and adjust your PATH environment
    variable to use your own Python 2.2 installation; for example:

      PATH=/usr/local:$PATH python2.2 setup.py install

I hope this helps you track down the problem. Multiple Python
installations are easy enough to manage and use, especially if you
remember to use python2.2 and python2.3 (as you've done) to control
the version you want to use.

Paul


From Mike at DeleteThis.Geary.com  Tue Jan  6 03:57:05 2004
From: Mike at DeleteThis.Geary.com (Michael Geary)
Date: Tue, 6 Jan 2004 00:57:05 -0800
Subject: Downloading files off Interet
References: <c9e6ac92.0401052332.294e2373@posting.google.com>
	<btdpvd$63dmh$1@ID-216132.news.uni-berlin.de>
Message-ID: <vvku32b13q3cec@corp.supernews.com>

> Blaktyger wrote:
> B> I would like to download some mp3 files from a web site.
> B> There is to much of them and I had the idea of writing a
> B> script to do it for me.
>
> B> Code:
> B> import string
> B> import urllib
>
> B> f = urllib.urlopen(""" http://www.somemp3site.com/somemp3.com""")
>
> B> fic=open('mp3file.mp3','w')
> B> fic.write(f.read())
> B> fic.close()
> B> f.close()
>
> B> I ran the program and the file is not playing.
> B> Can someone help me?
> B> Thanks

Egor Bolonev wrote:
> may be devas esti wb
> fic=open('mp3file.mp3','wb')

Or, as someone pointed out when I posted similar code a while back, you can
do the whole thing with a single call:

import urllib
urllib.urlretrieve( 'http://www.foo.com/bar.mp3', 'bar.mp3' )

See the documentation for urllib.urlretrieve for additional information,
especially the optional reporthook argument that lets you provide a callback
function so you can display the progress for a long file.

-Mike




From sidharthk at hotmail.com  Mon Jan 26 03:04:06 2004
From: sidharthk at hotmail.com (Sidharthk)
Date: 26 Jan 2004 00:04:06 -0800
Subject: efficient updating of nested dictionaries
References: <H%_Qb.2609$925.1917@nwrddc02.gnilink.net>
Message-ID: <8d02ff63.0401260004.4b056111@posting.google.com>

omission9 <omission9 at invalid.email.info> wrote in message news:<H%_Qb.2609$925.1917 at nwrddc02.gnilink.net>...
> I have a dictionary that looks like this
> MY_DICT[KEY_X][KEY_Y][KEY_Z]=FOO
> 
> I am having a problem updating this with a simple 
> MY_DICT.update(NEW_DICT) as update doesn't seem to care about getting 
> into the inner dicts.
> Getting the keys of each and iterating through and updating each one is 
> terribly slow as the number of keys gets bigger and bigger.
> What is the bst way to update my nested dicts?

Use a tuple
MY_DICT[(KEY_X,KEY_Y,KEY_Z)]=FOO

unless you have a particular reason to use these nested dicts :)


From candiazoo at comcast.net  Fri Jan  2 12:20:45 2004
From: candiazoo at comcast.net (Zoo Keeper)
Date: Fri, 02 Jan 2004 17:20:45 GMT
Subject: Problem building on BeOS...
Message-ID: <NLhJb.31440$I07.78784@attbi_s53>

For some reason, the Python preprocessing balks on the "\" line continuation
character.  Any ideas/thoughts?  Is it just that my version of gcc is not
supported?

I don't "need" numeric in my current project, but it is a nice package to have!
 Apps that do not need to be compiled install and run fine.  Actually, SQLite
built and installed fine...

Thanks, in advance.

Mike

Python 2.2.2 (#13, Dec  6 2002, 00:42:47)
[GCC 2.9-beos-991026] on beos5

$ python setup.py build
running build
running build_py
not copying Lib/ArrayPrinter.py (output up-to-date)
not copying Lib/LinearAlgebra.py (output up-to-date)
not copying Lib/MLab.py (output up-to-date)
not copying Lib/Matrix.py (output up-to-date)
not copying Lib/Numeric.py (output up-to-date)
not copying Lib/Precision.py (output up-to-date)
not copying Lib/RandomArray.py (output up-to-date)
not copying Lib/UserArray.py (output up-to-date)
not copying Lib/numeric_version.py (output up-to-date)
not copying Packages/FFT/Lib/FFT.py (output up-to-date)
not copying Packages/FFT/Lib/__init__.py (output up-to-date)
not copying Packages/MA/Lib/MA.py (output up-to-date)
not copying Packages/MA/Lib/MA_version.py (output up-to-date)
not copying Packages/MA/Lib/__init__.py (output up-to-date)
not copying Packages/RNG/Lib/Statistics.py (output up-to-date)
not copying Packages/RNG/Lib/__init__.py (output up-to-date)
running build_ext
building '_numpy' extension
gcc -DNDEBUG -O -IInclude -IPackages/FFT/Include -IPackages/RNG/Include
-I/boot/home/config/include/python2.2 -c Src/_numpymodule.c -o
build/temp.beos-5.0.4-BePC-2.2/_numpymodule.o
In file included from /boot/home/Downloads/Numeric-23.1/Src/_numpymodule.c:4:
/boot/home/Downloads/Numeric-23.1/Include/Numeric/arrayobject.h:234: stray '\'
in program
/boot/home/Downloads/Numeric-23.1/Include/Numeric/arrayobject.h:239: stray '\'
in program
/boot/home/Downloads/Numeric-23.1/Include/Numeric/arrayobject.h:241: stray '\'
in program
/boot/home/Downloads/Numeric-23.1/Include/Numeric/arrayobject.h:244: stray '\'
in program
/boot/home/Downloads/Numeric-23.1/Include/Numeric/arrayobject.h:247: stray '\'
in program
/boot/home/Downloads/Numeric-23.1/Include/Numeric/arrayobject.h:251: stray '\'
in program
/boot/home/Downloads/Numeric-23.1/Include/Numeric/arrayobject.h:253: stray '\'
in program
/boot/home/Downloads/Numeric-23.1/Include/Numeric/arrayobject.h:255: stray '\'
in program
/boot/home/Downloads/Numeric-23.1/Include/Numeric/arrayobject.h:257: stray '\'
in program
In file included from /boot/home/Downloads/Numeric-23.1/Src/_numpymodule.c:6:
/boot/home/Downloads/Numeric-23.1/Include/Numeric/ufuncobject.h:101: stray '\'
in program
/boot/home/Downloads/Numeric-23.1/Include/Numeric/ufuncobject.h:103: stray '\'
in program
error: command 'gcc' failed with exit status 1
$  



From usenet_spam at janc.invalid  Wed Jan 14 22:01:57 2004
From: usenet_spam at janc.invalid (JanC)
Date: Thu, 15 Jan 2004 03:01:57 GMT
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
	<pan.2004.01.14.01.17.00.970198@fakeemail.com>
	<bu2ana$bmpci$1@ID-207230.news.uni-berlin.de>
	<Xns94711BBF5F7D6JanC@213.119.4.35>
	<bu4uf4$3ri9$1@netnews.upenn.edu>
Message-ID: <Xns94712905F5122JanC@213.119.4.35>

paul m <pmagic at snet.net> schreef:

> JanC wrote:
>> 
>> You think "cross-platform" means "it runs out-of-the-box on all
>> possible platforms that ever existed, now exist, and will ever
>> exist"? 

> vi might come close... ;-)

It won't even run on my ZX Spectrum 48K, I suppose.

-- 
JanC

"Be strict when sending and tolerant when receiving."
RFC 1958 - Architectural Principles of the Internet - section 3.9


From http  Tue Jan 13 14:05:35 2004
From: http (Paul Rubin)
Date: 13 Jan 2004 11:05:35 -0800
Subject: C++ bad-mouthing (was: Why learn Python ??)
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<7xisjh1e3i.fsf@ruckus.brouhaha.com>
	<10064loqc7sd7e3@corp.supernews.com>
	<7xeku496wx.fsf@ruckus.brouhaha.com>
	<donn-9D2291.16343412012004@nntp6.u.washington.edu>
	<7xhdz08xgy.fsf@ruckus.brouhaha.com> <1073978329.887910@yasure>
	<87brp7agl7.fsf@pobox.com>
Message-ID: <7xvfnfmzy8.fsf@ruckus.brouhaha.com>

jjl at pobox.com (John J. Lee) writes:
> > But at any rate, I thought we were talking about huge projects
> > involving many programmers, and I don't think Grail was of that
> > sort at all.
> 
> Right.  Wasn't it a research project?  In any case, hardly a
> large-scale programming effort along the lines of Mozilla!

Grail wasn't huge but I think any serious browser qualifies as
substantial.  If you're saying it didn't really fail but actually
wasn't even seriously attempted, ok, that's even fewer substantial
programs that have even been tried in Python.


From sross at connectmail.carleton.ca  Fri Jan  2 12:44:28 2004
From: sross at connectmail.carleton.ca (Sean Ross)
Date: Fri, 2 Jan 2004 12:44:28 -0500
Subject: finding file size
References: <4V4Jb.12709$Vl6.2811218@news20.bellglobal.com>
	<99dce321.0401012246.712dd2fb@posting.google.com>
Message-ID: <i4iJb.14167$Vl6.3180520@news20.bellglobal.com>

"David M. Wilson" <dw-google.com at botanicus.net> wrote in message
news:99dce321.0401012246.712dd2fb at posting.google.com...
> 1) Using 'fd' as a name for a file object is a bad idea - you can get
> fds from os.open. If you insist on C-ish names, how about 'fp'
> instead? :)
>

or just f would work ...


> 2) There's nothing to stop the file object from having a size method,
except that file-like objects then have more to implement.

See Martin v. Loewis' post for some other rationale.

>
> How about something like:
>
> py> class SizedFile(file):
> ...     def __len__(self):
> ...             oldpos = self.tell()
> ...             self.seek(0, 2)
> ...             length = self.tell()
> ...             self.seek(oldpos)
> ...             return length
> ...
> py> bleh = SizedFile("/etc/passwd")
> py> len(bleh)
> 1520
> py> len([ x for x in bleh ])
> 33
>
>
>
> As I wrote this I realised it's wrong - size() would be better, since
> the length of the sequence is not the number of bytes. Maybe it is in
> binary mode? Dunno, me sleepy, goodnight..
>
>
> David.

Right. size() is more apt. Also, while I appreciate the effort of
subclassing file, what I was looking for was to have the builtin file (or
file-like) objects expose this operation, not just custom implementations.

Thanks for your response,
Sean




From gerryq at indigo.ie  Thu Jan 15 06:46:35 2004
From: gerryq at indigo.ie (Gerry Quinn)
Date: Thu, 15 Jan 2004 11:46:35 GMT
Subject: The GPL / BSD cultural divide (was ProtoCiv: porting Freeciv to
	Python CANNED)
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<n22Nb.11299$9k7.210522@news.xtra.co.nz>
	<bu2pgs$d123a$1@ID-207230.news.uni-berlin.de>
	<4004EC9E.1E2E2893@alcyone.com> <bu3iv2$n2u$4@tyfon.itea.ntnu.no>
	<bu4dii$daqjq$1@ID-207230.news.uni-berlin.de>
Message-ID: <a%uNb.5410$HR.11098@news.indigo.ie>

In article <bu4dii$daqjq$1 at ID-207230.news.uni-berlin.de>, "Brandon J. Van Every" <try_vanevery_at_mycompanyname at yahoo.com> wrote:
>Agreed, and more specifically, there is a huge *cultural divide* between
>most OSS developers and proprietary commercial developers who simply want to
>add some OSS "to get the boring bits over with."  

And guess what bits of a project OSS programmers often tend not to 
bother finishing?

As somebody once said, the purpose of paying wages is not to motivate 
people to work.  It's to motivate them to come in on Monday mornings.  

Think of the boring bits as commercial software's secret weapon ;-)

Gerry Quinn                                   
-- 
http://bindweed.com 
Screensavers, Games, Kaleidoscopes
Download free trial versions


From john.abel at pa.press.net  Tue Jan 20 06:12:21 2004
From: john.abel at pa.press.net (John Abel)
Date: Tue, 20 Jan 2004 11:12:21 +0000
Subject: Python database
In-Reply-To: <fa538331.0401200246.3a8da8fd@posting.google.com>
References: <fa538331.0401200246.3a8da8fd@posting.google.com>
Message-ID: <400D0D15.5030001@pa.press.net>


*Have a look at gadfly, gadfly.sf.net
*


Brice Vissi?re wrote:

>Hi python friends,
>
>I'm currently working on a data handling tool.
>
>For internal storage, I'm looking for a 100% python database.
>
>I have some constraints:
> + multi-platform
> + relational with built-in query system (SQL preferably)
> + built-in string functions
> + reliable
> + fast
>
>I don't care about:
> + network access
> + concurracy control
> + transaction commit/rollback
>
>One of the key feature I'm looking for is direct string handling in
>queries: concatenation, substring extraction, stripping, justifying,
>... all we can do with python strings.
>
>My first thought was to use Gadfly. I've downloaded and installed it.
>Now, I'm  investigating the documentation and examples to find string
>capabilities of Gadfly, but at first look, it seems that it will not
>fit to my needs.
>
>My problem would be solved by using a database allowing user function
>creation, but I don't know whether such a tool exists.
>
>So, have you any idea of a db tool I should use ?
>
>Thanks in advance.
>
>Brice
>  
>



From jepler at unpythonic.net  Mon Jan  5 09:54:52 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Mon, 5 Jan 2004 08:54:52 -0600
Subject: Embedding Python with Dynamic Loading (win)
In-Reply-To: <5e571368.0401050603.265d469d@posting.google.com>
References: <5e571368.0401050603.265d469d@posting.google.com>
Message-ID: <20040105145452.GB5514@unpythonic.net>

Simon,
I have heard that vim can use dlopen() (the unix equivalent of
LoadLibrary) to run Python extensions if it's configured that way.  You
might want to look at their code.

Jeff



From artur_spruce at yahoo.com  Thu Jan 29 10:15:04 2004
From: artur_spruce at yahoo.com (Artur de Sousa Rocha)
Date: Thu, 29 Jan 2004 07:15:04 -0800 (PST)
Subject: Error under Cygwin - threading module
In-Reply-To: <20040129145637.GD920@tishler.net>
Message-ID: <20040129151504.47508.qmail@web21105.mail.yahoo.com>

--- Jason Tishler <jason at tishler.net> wrote:
> AdSR,
> 
> Please keep you replies on-list.

Oops. OK, here it goes.

> On Wed, Jan 28, 2004 at 09:30:40AM -0800, Artur de Sousa Rocha wrote:
> > --- Jason Tishler <jason at tishler.net> wrote:
> > > I "spoke" too soon -- I was able to reproduce the problem after 160
> > > iterations.  Please try the latest snapshot:
> > > 
> > >     http://cygwin.com/snapshots/
> > > 
> > > and report back whether or not this solves your problem.
> > 
> > I installed the latest snapshot of cygwin1.dll
> > (cygwin1-20040126.dll.bz2).  The problem persists, error messages show
> > about as often as previously.

AdSR

__________________________________
Do you Yahoo!?
Yahoo! SiteBuilder - Free web site building tool. Try it!
http://webhosting.yahoo.com/ps/sb/



From Test at spam.stop.now  Sun Jan 25 04:28:42 2004
From: Test at spam.stop.now (Test)
Date: Sun, 25 Jan 2004 11:28:42 +0200
Subject: Test
References: <bv014r$200e$1@pandora.alkar.net>
Message-ID: <bv028b$26tv$1@pandora.alkar.net>

i see you ok!

"solo" <no.spam at at.all> ???????/???????? ? ???????? ?????????:
news:bv014r$200e$1 at pandora.alkar.net...
> Sorry, it&#39;s a test.




From peter at engcorp.com  Wed Jan 28 09:11:56 2004
From: peter at engcorp.com (Peter Hansen)
Date: Wed, 28 Jan 2004 09:11:56 -0500
Subject: Portable /dev/null?
References: <zQBRb.6394$Ja2.59118@nnrp1.uunet.ca>
	<bv6qs6$24t$1@news.service.uci.edu>
Message-ID: <4017C32C.F87637B7@engcorp.com>

Josiah Carlson wrote:
> 
> Nicolas Fleury wrote:
> 
> > Hi everyone,
> >     Is there an object in some standard library that would be the
> > portable equivalent of "file('/dev/null','w')" or do I have to create my
> > own class and object to do it?  If it doesn't exist, do you think it
> > would be a good idea to have such an object in a standard library?
> >
> > Thx and Regards,
> >
> > Nicolas
> >
> 
> In Windows you can open the file 'NUL' and it will work the same as
> '/dev/null' in *nix.

Note that Nicolas asked for a "portable" approach...  clearly neither
NUL nor /dev/null are portable.


From andymac at bullseye.apana.org.au  Sun Jan 25 06:20:23 2004
From: andymac at bullseye.apana.org.au (Andrew MacIntyre)
Date: Sun, 25 Jan 2004 22:20:23 +1100 (EST)
Subject: Psyco on PowerPC?
In-Reply-To: <Pine.LNX.4.58-035.0401241456360.5509@unix44.andrew.cmu.edu>
References: <30E0BEC9-4DE7-11D8-B663-000393DB5438@andrew.cmu.edu>
	<26b7aa41.0401232250.3e6588a8@posting.google.com>
	<Pine.LNX.4.58-035.0401241456360.5509@unix44.andrew.cmu.edu>
Message-ID: <20040125221804.T80281@bullseye.apana.org.au>

On Sat, 24 Jan 2004, Benjamin Han wrote:

> Ok here is what I did
>
> 1. pulled the latest CVS
> 2. did a "python setup.py install"
> 3. ran this testing program:

{...}

> The result (on my PowerBook G4):
>
> 2597406.... (big number)
> * Elapsed time = 2.41602706909
> Fatal Python error: psyco: out of memory
> Abort trap
>
>
> I have 1 GB memory. Maybe it's still in the early development stage?

As its not part of a public psyco release, I think that would be a safe
assumption.

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



From brian at rk-speed-rugby.dk  Tue Jan 13 10:48:19 2004
From: brian at rk-speed-rugby.dk (Brian Elmegaard)
Date: 13 Jan 2004 16:48:19 +0100
Subject: Generate PDF or LaTeX ?
References: <bu0r5k$q7f$1@news-reader4.wanadoo.fr>
Message-ID: <ud69nq27w.fsf@rk-speed-rugby.dk>

"Sinclair" <fred.duwez at freesurf.fr> writes:

> I am looking for a way to generateLaTeX or PDF code from python/zope
> objects. The goal is to produce print documents.
> Does any python module exist to do that ?

I did some which worked quite well for production of a Conference
proceedings from a set of pdfs including keyword and author index. It
is doing a latex step before the pdf.

If you are interested, take a look at:
http://www.et.dtu.dk/staff/be/proceedings/proceedingsdoc.pdf
http://www.et.dtu.dk/staff/be/proceedings/proceedings.zip

-- 
Brian (remove the sport for mail)
http://www.et.dtu.dk/staff/be


From na  Fri Jan  9 11:42:10 2004
From: na (Andrew)
Date: Fri, 9 Jan 2004 08:42:10 -0800
Subject: How to insert into listbox using wxPython
Message-ID: <vvr25kjnd5n397@corp.supernews.com>

Hi I just started learning wxPython

I wanted to know how I could do this in wxPython


self.listbox.delete(0, END)
        for item in self.results:
            self.listbox.insert(END, item)


I don't know but I think the insert and delete things here are specific of
Tkinter which I have been studying for the last little while

Anyhelp would be cool




From timr at probo.com  Fri Jan  9 20:57:54 2004
From: timr at probo.com (Tim Roberts)
Date: Fri, 09 Jan 2004 17:57:54 -0800
Subject: CGI module problem: duplicated output
References: <mailman.219.1073658628.12720.python-list@python.org>
Message-ID: <9smuvv0ou8qpilg9vlpgpqt45apalmur49@4ax.com>

Mimal <mi-mal at o2.pl> wrote:
>
>Hello,
>     I started to learn how to use python with CGI. I went through some 
>tutorials, but then I found one problem, that seems to be something 
>stupid. I tried to find answer using google, but I couldn't.
>
>This is my simple CGI script:
>
>#!/usr/bin/python
>import cgi
>
>print "Content-type: text/html\n"
>print "<html>Hello, world!</html>"

Pardon me for saying so, but I don't believe you.  Your script must
actually look like this:

  #!/usr/bin/python
  import cgi

  print "<html>Hello, world!</html>"
  print "Content-type: text/html\n"
  print "<html>Hello, world!</html>"

That's the only answer that fits your results, and it would produce exactly
the results you describe.
-- 
- Tim Roberts, timr at probo.com
  Providenza & Boekelheide, Inc.


From hans at zephyrfalcon.org  Mon Jan 12 21:53:10 2004
From: hans at zephyrfalcon.org (Hans Nowak)
Date: Mon, 12 Jan 2004 21:53:10 -0500
Subject: how can I execute a function string
In-Reply-To: <pan.2004.01.13.01.17.27.878470.10201@presidency.com>
References: <pan.2004.01.13.01.17.27.878470.10201@presidency.com>
Message-ID: <40035D96.2040800@zephyrfalcon.org>

Rajarshi Guha wrote:

> Hi ,
>  I have some code that generates a function on the fly in a string. 
> At a later point in time I want to execute this function (which also
> requires a parameters to be passed to it). So the code is something like
> this:
> 
> def generate_func():
> 	s = """ def function(x):
> 	print x
> 	return 2
> """
> 	return s
> 
> funcstring = generate_func()
> retval = ....
> 
> That is, retval should have the value returned from the evaluation of the
> function in the string funcstring.
> 
> Is this possible by means of simple function calls or does this involve
> some sort of black magic?

It's possible:

 >>> def generate_func():
...     s = """def f(x):
...     print x
...     return 2"""
...     d = {}
...     exec s in d
...     return d['f']
...
 >>>
 >>> g = generate_func()
 >>> g(4)
4
2
 >>>

...but this way of doing it has several drawbacks.  For example, exec is picky 
about the strings it accepts; e.g. if you leave a trailing newline you get a 
syntax error.  Compare:

 >>> def generate_func():
...     s = """def f(x):
...     print x
...     return 2
...     """
...     d = {}
...     exec s in d
...     return d['f']
...
 >>> g = generate_func()
Traceback (most recent call last):
   File "<input>", line 1, in ?
   File "<input>", line 7, in generate_func
   File "<string>", line 4

     ^
SyntaxError: invalid syntax

Also, if the string containing the syntax comes from an "untrusted source", 
then it's a potential security hazard.

I'm not sure what you're trying to do here, but you might want to consider 
generating an actual function, rather than a string to be evaluated:

 >>> def generate_func():
...     def f(x):
...         print x
...         return 2
...     return f
...
 >>> h = generate_func()
 >>> h(5)
5
2

HTH,

-- 
Hans (hans at zephyrfalcon.org)
http://zephyrfalcon.org/





From beliavsky at aol.com  Fri Jan 16 08:39:43 2004
From: beliavsky at aol.com (beliavsky at aol.com)
Date: 16 Jan 2004 05:39:43 -0800
Subject: C++ bad-mouthing (was: Why learn Python ??)
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<7xisjh1e3i.fsf@ruckus.brouhaha.com>
	<10064loqc7sd7e3@corp.supernews.com>
	<dc6f5c99.0401130239.56f9ae36@posting.google.com>
Message-ID: <3064b51d.0401160539.49fc5893@posting.google.com>

grahamd at dscpl.com.au (Graham Dumpleton) wrote in message 
 
> Would agree that more often than not it is the programmers working
> on the project. I have met very very few programmers who I thought
> had what it takes to develop decent C++ code which is understandable
> and maintainable. Part of the problem though is not the programmers
> but the C++ libraries they have to work with. Even though the
> STL may be the "standard template library", it is pretty dangerous stuff.
> Your average programmer however will tell you it is wonderful stuff
> and never understand its danger and how one can so easily create
> huge disasters with it.  

<SNIP>

What is so dangerous about the STL in C++?


From wotan at oneeye.com  Fri Jan 16 06:14:42 2004
From: wotan at oneeye.com (Eternal Vigilance)
Date: Fri, 16 Jan 2004 11:14:42 GMT
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
Message-ID: <4007C6CF.5DB6F586@oneeye.com>

Congradulations.  You finally discovered that people will not do your work for
you
 for Free.   Open Source projects produce 99% garbage and thats for the projects

that already have a good working 'product'.

If you want it done right, do it yourself.  (Either that or get alot better at
talking the
right people into doing the work and then manage them without interfering too
much)


"Brandon J. Van Every" wrote:

> "Brandon J. Van Every" <try_vanevery_at_mycompanyname at yahoo.com> wrote in
> message news:bsd101$c1oj1$1 at ID-207230.news.uni-berlin.de...
> > I am
> >
> > - *TENTATIVELY* -
> >
> > (operative word) undertaking the project of porting the GPL open source
> game
> > "Freeciv" to Python.  Freeciv is, in essence, an almost straight clone of
> > Sid Meier's Civilization II, albeit with better cross-platform and
> > multiplayer support.  www.freeciv.org
>
> Here's a postmortem.  Short version: I've canned the project.  Many of you
> will say "I told you so," but at least I almost have a VS .NET 2003 build to
> show for it.
>
> First I decided to tackle the subgoal of freeing Freeciv from the UNIX
> Cygwin / MinGW crud.  As I write this, I have it compiling and running on VS
> .NET 2003, and that isn't a small accomplishment.  But, the game hangs
> shortly after the server starts.  I'm probably within spitting distance of
> completing this subgoal, but it has taken too long and has been really
> really boring.  If there isn't some major lurking horror I'll get it working
> eventually, but I've put it on the backburner.  Personal projects have to be
> personally rewarding, and this isn't it.
>
> Looking at the Freeciv C code in more detail, I've realized that there's way
> too much code to consider "generally" rewriting stuff in Python.  Rather,
> I'd have to embed Python and add / rework game functionality piecemeal.
> This is a lot of work, there's a whole lot of boring "wrapper code" to cough
> up.  Between performing this kind of labor on a GPL project, and performing
> it for Ocean Mars, I've decided that the former is not rational.  And more
> importantly, it doesn't make me happy.
>
> I've also become extremely disillusioned with Open Source developers.
> Basically, for a commercially minded developer such as myself, I don't think
> they're any value add at all.  Ergo, all public projects I might conceive of
> are fundamentally DOA.
>
> For 6 months I've experimented with how Open Source development might fit my
> commercial goals.  What I've found is that I can't rely on people, only
> their coding artifacts.  Every Open Source game developer I've met in the
> past 6 months has been, at a basic level, a hobbyist.  Hobbyists simply
> don't manage projects according to the demands of commercial development.
> This implies that if I'm in charge, they won't like my style; and when
> they're in charge, it drives me fucking nuts.  I've now accepted that the
> Open Source talent pool is what it is.  It is capable of being fun for
> programmer geeks.  But with few exceptions, such as perhaps
> http://nebula.sourceforge.net, it cannot achieve the kinds of projects I
> have in mind.
>
> I'm also starting to downright despise Linuxers.  If I see another project
> that's "cross-platform, so long as your platform is Linux," I'm going to cut
> someone's head off.  Linuxers have this completely broken piece of shit
> build management mentality about them.  They think that because on *their*
> OS all these libraries are preinstalled, and everyone's compiling things all
> the time, that they don't have to do anything to maintain consistent builds
> on other platforms.  Rather, it's always the induhvidual's responsibility to
> download and install all the needed component libraries.  Of course these
> are usually UNIX-centric libraries, often not readily compiled on Windows.
> Or requiring Cygwin or MinGW, which real Windows developers don't want to
> use.  Versioning becomes a nightmare, is it the Cygwin or MinGW version?
> It's just not the way mainstream Windows developers do things.
>
> Whether my Freeciv VS .NET 2003 build makes it into the official Freeciv
> source pool remains to be seen.  The Freeciv people are, after all, a bunch
> of Linuxers.  They don't have a single .NET developer among them, and I'm
> not about to become their .NET buildmaster.  When I say things like "Windows
> people want to link libpng and zlib against MSVCRT71.dll," they say, "we
> don't want to bloat our source tree with needed libraries."  Maybe in time I
> will get them to accept a separate package of underlying libraries for
> Windows folk.
>
> --
> Cheers,                         www.indiegamedesign.com
> Brandon Van Every               Seattle, WA
>
> "Desperation is the motherfucker of Invention." - Robert Prestridge



From eltronic at juno.com  Mon Jan  5 00:39:53 2004
From: eltronic at juno.com (eltronic at juno.com)
Date: Mon, 5 Jan 2004 00:39:53 -0500
Subject: Recurring dates module [was: Project dream]
Message-ID: <20040105.004000.-3691831.0.eltronic@juno.com>

<skip at pobox.com> writes:
> 
>     eltronic> rats, datetime IIR is only py2.3 unless it already 
> works in
>     eltronic> py2* or some kind soul has backported it ala sets and 
> some of
>     eltronic> itertools. 
> 
> Tim originally wrote datetime in Python.  You can grab the latest 
> version
> from the CVS sandbox:
>http://cvs.sourceforge.net/viewcvs.py/python/python/nondist/sandbox/date
time/datetime.py
> 
thanks,
recur's test use of datetime rev=1.159 
didn't require any tweak.
recur itself only needs
from __future__ import generators
from enumerate import enumerate

and /python22/lib/enumerate.py
which was easy enough to create.

> 
> There has been recent discussion on python-dev about what to do with 
> the
> Python version of a module after it's been rewritten in C.  It would 
> be nice
> if someone figured out a way to keep datetime.py in sync with the C

deep dreaming.
a program to produce specifications of a 
modules functions from just the module itself?
all such modules include a _version or something?

maybe I can find the unit tests from py2.3
and see if any errors turn up.



e
please forward all spam  to "me"<u%63e at f%74c.go%76>

________________________________________________________________
The best thing to hit the internet in years - Juno SpeedBand!
Surf the web up to FIVE TIMES FASTER!
Only $14.95/ month - visit www.juno.com to sign up today!



From miki.tebeka at zoran.com  Mon Jan 12 03:30:11 2004
From: miki.tebeka at zoran.com (Miki Tebeka)
Date: 12 Jan 2004 00:30:11 -0800
Subject: Search and replace a specific word in a file object.
References: <56f42e53.0401111519.2da31b8a@posting.google.com>
Message-ID: <4f0a9fdb.0401120030.2c2534c2@posting.google.com>

Hello,

Use the fileinput module:
from fileinput import input

def replace(filename, old, new):
    for line in input(filename, inplace=1):
        print line.replace(old, new)

HTH.
Miki


From snake at penza-gsm.ru  Thu Jan 15 02:07:39 2004
From: snake at penza-gsm.ru (Alexey Nezhdanov)
Date: Thu, 15 Jan 2004 10:07:39 +0300
Subject: Bug or feature?
In-Reply-To: <DE1CF2B4FEC4A342BF62B6B2B334601E561C1E@opus.amorhq.net>
References: <DE1CF2B4FEC4A342BF62B6B2B334601E561C1E@opus.amorhq.net>
Message-ID: <200401151007.39791.snake@penza-gsm.ru>

> Alexey Nezhdanov wrote:
> > Hello. Found a strange python behaivoir while writing some
> > object. I've
> > stripped out all other stuff so the problem is stright here:
> > =================================
> > #!/usr/bin/python
> >
> > class Object:
> >      def __init__(self,val):
> >          self.val=val
> >
> >      def Sub(self,delta):
> >          self.val-=delta
> >          return delta
> >
> > c=Object(1)
> >
> > ### case 1 ###
> > d=c.Sub(1)
> > c.val+=d
> > print 'case A:',c.val
> >
> > ### case 2 ###
> > c.val+=c.Sub(1)
> > print 'case B:',c.val
> > =================================
> > Case 1 and case 2 prints out different calues (1 and 2 respectively).
> > Do not know - if this is a bug or feature of python.
>
> Disassembly is your friend:
> ...
> As you can see, the order of evaluation in pluseq() is:
>    load val, call Sub(), add, store result.
> whereas the order in subthenplus() is:
>    call Sub(), load val, add, store result.
>
> ...which explains things a bit. If we had written inst.val = inst.val +
> inst.Sub(1), the order would be the same as pluseq (but we'd get a
> binary add instead of inplace).
> Robert Brewer
Ok. Let me explain. I know the reasons of this particular effect. I have not 
disassembled code myself but nevertheless I come to the same idea myself.
The question is - is such *python* behaivoir is correct or not.

Since one person can write string like
c.val+=c.Sub(1)
he can expect that both addition and Sub execution will complete and no 
results will be dropped.

-- 
Respectfully
Alexey Nezhdanov






From theller at python.net  Fri Jan 16 11:51:08 2004
From: theller at python.net (Thomas Heller)
Date: Fri, 16 Jan 2004 17:51:08 +0100
Subject: Retrive unicode keys from the registry
Message-ID: <brp3bzwj.fsf@python.net>

First I was astonished to see that _winreg.QueryValue doesn't accept
unicode key names, then I came up with this pattern:

def RegQueryValue(root, subkey):
    if isinstance(subkey, unicode):
        return _winreg.QueryValue(root, subkey.encode("mbcs"))
    return _winreg.QueryValue(root, subkey)

Does this look ok?

Thomas


From eric.brunel at N0SP4M.com  Mon Jan 19 09:42:34 2004
From: eric.brunel at N0SP4M.com (Eric Brunel)
Date: Mon, 19 Jan 2004 15:42:34 +0100
Subject: Tkinter
References: <mailman.501.1074519339.12720.python-list@python.org>
Message-ID: <bugptb$2bt$1@news-reader4.wanadoo.fr>

km wrote:
> Hi all,
> 
> Is there any good online tutorial which is a good intro for Tkinter programming in Python ? 

"Thinking in Tkinter", by Stephen Ferg: 
http://www.ferg.org/thinking_in_tkinter/index.html

See also Tkinter example scripts in the Python *source* distribution (in 
Demo/tkinter)

HTH
-- 
- Eric Brunel <eric dot brunel at pragmadev dot com> -
PragmaDev : Real Time Software Development Tools - http://www.pragmadev.com



From martin at v.loewis.de  Sun Jan 25 03:58:11 2004
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 25 Jan 2004 09:58:11 +0100
Subject: utf8 encoding problem
In-Reply-To: <2c60a528.0401241501.11cab334@posting.google.com>
References: <20040122103549.GA5620@wiggy.net>	<Pine.LNX.4.44L.0401221640010.31484-100000@ods.pravda.rfn.ru>
	<mailman.643.1074780990.12720.python-list@python.org>
	<buta7q$vtv$06$1@news.t-online.com>
	<2c60a528.0401241501.11cab334@posting.google.com>
Message-ID: <bv00f3$na7$05$1@news.t-online.com>

Andrew Clover wrote:
> Quite so, in theory. Of course in reality, no browser today includes a
> Content-Type header in the subparts of a multipart/form-data submission,
> so there's nowhere to specify an charset here either! argh.

Right. In this case, the algorithm Wichert quotes should apply.

I once tried to study why browsers won't send Content-Type headers.
Actually, they *do* send Content-Type headers, but omit the charset=
parameter. I submitted various bug reports, and the Mozilla people
replied that they tried to, and found that various CGI scripts would
break when confronted with the standards-conforming request, but
work when they get the deprecated form.

So it looks like this situation will extend indefinitely.

> multipart/form-data as implemented in current UAs is just as encoding-unaware
> as application/x-www-form-urlencoded, sadly. In practical terms it does not
> really matter much which is used.

Right - for practical terms, standards don't matter much. As this thread 
shows, the form used *does* matter in practical terms though: Users
of application/x-www-form-urlencoded are now confronted with the
unescaping-then-decoding issue, which apparently is a challenge.

Regards,
Martin



From http  Sat Jan  3 18:45:03 2004
From: http (Paul Rubin)
Date: 03 Jan 2004 15:45:03 -0800
Subject: pickling lambdas?
References: <9abf3a27.0401031446.4d73cfb2@posting.google.com>
	<vvekdnhlk0mq35@news.supernews.com>
Message-ID: <7x65fs38cg.fsf@ruckus.brouhaha.com>

"John Roth" <newsgroups at jhrothjr.com> writes:
> > however, upon google searching for "python lambda pickle" i find 2
> > posts, one including gvr, which apparently demonstrate that this was
> > being attempted and even suggest that it is feasible.  has this become
> > available yet, or will it be soon?
>
> Why do you want to do this? According to the docs, all that
> is saved for a function or a class is the name. Code, data and
> so forth is not saved, so it makes no sense to try to pickle
> a lambda unless you've bound it to a name at the module level. 

I think the idea may be to pickle a closure, to save the data inside
it.  I do remember some mention about pickling generators.  Anyway, in
Python 2.x the closest you can come to that is pickling class
instances.


From wilkSPAM at OUTflibuste.net  Sat Jan 17 06:20:44 2004
From: wilkSPAM at OUTflibuste.net (Wilk)
Date: Sat, 17 Jan 2004 12:20:44 +0100
Subject: py2exe 0.5.0 (finally) released
References: <y8s7aeps.fsf@python.net> <87wu7rpn9d.fsf@blakie.riol>
Message-ID: <87ptdi6ctv.fsf@blakie.riol>


I answer to myself, the problem was because i didn't remove an old
py2exe version in site-packages.

Bye

Wilk <wilkSPAM at OUTflibuste.net> writes:

> Hi,
>
> I just try this new release with the simple sample, it throw an
> exception :
>
> Traceback (most recent call last):
>   File "setup.py", line 34, in ?
>     console = ["hello.py"],
>   File "C:\PYTHON23\lib\distutils\core.py", line 149, in setup
>     dist.run_commands()
>   File "C:\PYTHON23\lib\distutils\dist.py", line 907, in run_commands
>     self.run_command(cmd)
>   File "C:\PYTHON23\lib\distutils\dist.py", line 927, in run_command
>     cmd_obj.run()
>   File "C:\PYTHON23\Lib\site-packages\py2exe\build_exe.py", line 197, in run
>     self.create_binaries(py_files, extensions, dlls)
>   File "C:\PYTHON23\Lib\site-packages\py2exe\build_exe.py", line 391, in create_
> binaries
>     arcname, target.script)
>   File "C:\PYTHON23\Lib\site-packages\py2exe\build_exe.py", line 590, in build_e
> xecutable
>     self.add_versioninfo(target, exe_path)
>   File "C:\PYTHON23\Lib\site-packages\py2exe\build_exe.py", line 609, in add_ver
> sioninfo
>     from py2exe.resources.VersionInfo import Version, RT_VERSION
>   File "C:\PYTHON23\Lib\site-packages\py2exe\py2exe.py", line 3, in ?
>     raise RuntimeError, "something's wrong"
> RuntimeError: something's wrong
>
> hello.exe works indeed
>
> I try it on win98 and winNT, with last python2.3.3
>
> There is no unicode file do download for winNT ?
>
> bye
>
> -- 
> Wilk - http://flibuste.net

-- 
Wilk - http://flibuste.net


From just at xs4all.nl  Sat Jan 31 11:43:05 2004
From: just at xs4all.nl (Just)
Date: Sat, 31 Jan 2004 17:43:05 +0100
Subject: zlib
References: <opr2m0svtf1bpyqk@news.swissonline.ch>
	<mailman.1074.1075564744.12720.python-list@python.org>
Message-ID: <just-B44F2A.17430531012004@news1.news.xs4all.nl>

In article <mailman.1074.1075564744.12720.python-list at python.org>,
 Skip Montanaro <skip at pobox.com> wrote:

>     Dave> I am looking for a zlib implementation (or any other which can
>     Dave> handle zip archives) for Python 1.5.2. I only found one for Python
>     Dave> >= 2.2 :-(
> 
> Assuming you have access to a C compiler, you might be able to fairly easily
> backport the 2.2 version of zlibmodule.c back to 1.5.2.

zlib is part of the 1.5.2 distro, but zipfile.py was new in 1.6 it seems.

Just


From __peter__ at web.de  Wed Jan 28 14:19:31 2004
From: __peter__ at web.de (Peter Otten)
Date: Wed, 28 Jan 2004 20:19:31 +0100
Subject: Nested lists or conditional logic?
References: <ead93a6.0401280956.41fd4193@posting.google.com>
Message-ID: <bv91r9$eub$03$1@news.t-online.com>

mike beck wrote:

> this is not all complex, but as a noob i'm having a hard time getting
> my head around it.
> 
> i have a list of items. i need to print the items in batches of x,
> with a summary line after each complete or partial batch, and a total
> line at the end of the job.

[...]

> i've done the following, which works, but it seems like there must be
> a better/simpler/faster way to do this with nested loops. ideas?

Your code looks OK to me (apart from the duplicate colon). Here's a "no
maths" variant that uses nested loops:

from itertools import islice

ITEMSINBATCH = 3;
ARBITRARYNUM = 11;

sample = ["item #%d" % i for i in range(ARBITRARYNUM)]
it = iter(sample)

while True:
    more = False
    for item in islice(it, ITEMSINBATCH):
        more = True
        print item
    if not more: break
    print "summary"

I'm generally fond of the itertools module; this time I didn't find a way to
get rid of the ugly more flag, though. Implementing your own iterator with
a hasMore() method seems overkill.

Peter



From djordje.telebak at telekom.yu  Thu Jan 29 10:02:42 2004
From: djordje.telebak at telekom.yu (Djordje Telebak)
Date: Thu, 29 Jan 2004 16:02:42 +0100 (Central Europe Standard Time)
Subject: Upload with FTP
Message-ID: <40192092.00000F.03492@DX_GX100_79>

Hi all

 

I'm trying to write a little python file for file upload.

 

I have wrote something like this

 

from ftplib import FTP

ftp = FTP('172.xxx.yyy.zzz')

ftp.login('login_name','password')

ftp.storlines('STOR PRE',something)

ftp.quit()

 

I don't know what is wrong and what I have to put instead of

something or to change i this line to make this work 

(to upload file PRE from let's say C:\ directory to some home dir.

on host 172.xxx.yyy.zzz).

 

BR

 

Djordje Telebak
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From jensthiede at webgear.co.za  Wed Jan 21 13:16:46 2004
From: jensthiede at webgear.co.za (Jens Thiede)
Date: 21 Jan 2004 10:16:46 -0800
Subject: ServingSocket question regarding the SystemExit exception
Message-ID: <dcde6f.0401211016.36d41a9b@posting.google.com>

How do I get SystemExit to be of use, but not noticed in a
StreamRequestHandler spawned by a ThreadingTCPServer?

I tried various ways of getting rid of a StreamRequestHandler thread
namely thread.exit() sys.exit() (which is basicly just raises
SystemExit) and all these were caught (for that reason). So I tried
os._exit(0) and even os.kill(pid, 15) and os.kill(pid, 9) but,
ofcourse they get rid of my program all together.

Help would be valued,

Jens Thiede


From noemail at noemail4u.com  Thu Jan 22 07:46:44 2004
From: noemail at noemail4u.com (Dang Griffith)
Date: Thu, 22 Jan 2004 12:46:44 GMT
Subject: Checking for duplicate instances of a script...
References: <400e4638$0$19274$626a54ce@news.free.fr>
Message-ID: <8b146afd37580ecc733f713e953b542c@news.teranews.com>

On Wed, 21 Jan 2004 10:28:20 +0100, "Guillaume Dargaud"
<NOusenetSPAM at gdargaud.net> wrote:

>Hello, python beginner here,
>How can I make sure that a given script is never run more than once at the
>same time in a system ?
>Besides checking 'ps' for its own name. Most modern langages have a direct
>way to do that.
>Thanks
What modern language has a direct way to do that?
    --dang


From gagenellina at softlab.com.ar  Fri Jan 30 20:53:44 2004
From: gagenellina at softlab.com.ar (Gabriel Genellina)
Date: 30 Jan 2004 17:53:44 -0800
Subject: Automatic access serialization
Message-ID: <946d2ebc.0401301753.5bbe87c5@posting.google.com>

Hello!

I have a number of objects that are not thread-safe - no locking
mechanism was originally provided.
But I want to use them in a thread-safe way. I don't want to analyze
each class details, looking for where and when I must protect the
code. So I wrote this sort-of-brute-force locking mechanism using
threading.RLock() around __getattr__ / __setattr__ / __delattr__.
The idea is that *any* attribute and method access is protected by the
lock. The calling thread may acquire the lock multiple times, but
other threads must wait until it is released.
This may be too much restrictive, and a bottleneck in performance,
since *all* accesses are effectively serialized - but it's the best I
could imagine without deeply analyzing the actual code.
I *think* this works well, but since I'm not an expert in these
things, any comments are welcome. Specially what could go wrong, if
someone could anticipate it.
Note: As written, this only works for old-style classes. I think that
just by adding a similar __getattribute__ would suffice for new-style
classes too - is that true?


--- begin autolock.py ---
import threading

class AutoLock:
    # "brute-force" locking wrapper to any object
    # *all* attribute access is serialized in a thread-safe way.
    
    def __init__(self, target):
        dict = self.__dict__
        dict['_%s__lock'%self.__class__.__name__] = threading.RLock()
        dict['_%s__target'%self.__class__.__name__] = target

    def __getattr__(self, key):
        self.__lock.acquire()
        try:
            return getattr(self.__target, key)
        finally:
            self.__lock.release()
            
    def __setattr__(self, key, value):
        self.__lock.acquire()
        try:
            setattr(self.__target, key, value)
        finally:
            self.__lock.release()
            
    def __delattr__(self, key):
        self.__lock.acquire()
        try:
            delattr(self.__target, key)
        finally:
            self.__lock.release()

--- end autolock.py ---

Gabriel Genellina
Softlab SRL


From Kyler at news.Lairds.org  Tue Jan 20 10:12:05 2004
From: Kyler at news.Lairds.org (Kyler Laird)
Date: Tue, 20 Jan 2004 15:12:05 GMT
Subject: efficent test for array with only one value?
References: <00ird1-dmd.ln1@jowls.lairds.org>
	<PJYOb.82151$C87.70674@twister.socal.rr.com>
	<25mud1-s1m.ln1@jowls.lairds.org>
	<p63Pb.84084$C87.13614@twister.socal.rr.com>
Message-ID: <tvpvd1-4sn.ln1@jowls.lairds.org>

Robert Kern <rkern at ucsd.edu> writes:

>However, alltrue(a.flat == a.flat[0]) will work but won't short-circuit. 

How did I miss that?!  Yes, that's the kind of operation I sought.
I'm surprised that it doesn't short-circuit.  It *should*, right?

It's a shame that it only works along a single axis.  The use of
"flat" is a problem for me.  I'm looking at sections of an image
(building a quadtree) so the arrays I'm checking are not contiguous.
I think that means I have to resort to something ugly like this.
	Numeric.alltrue(Numeric.alltrue(a == a[0,0]))
That eliminates many opportunities for short-circuiting.

I can also flatten the array using reshape() before checking it.  I
assume that also means a lot of possibly unnecessary operations.
(Does reshape() return a copy of the array or just an array with
the original data and a new shape?)

>Fast, though, if the array isn't huge.

Indeed, I think I'll use it.  I can always write a clean short-
circuiting C version later.

Thank you!

--kyler


From hameedkhaan at yahoo.com  Sat Jan 24 03:07:53 2004
From: hameedkhaan at yahoo.com (Hameed Khan)
Date: Sat, 24 Jan 2004 00:07:53 -0800 (PST)
Subject: there is no exitfunc in sys module
Message-ID: <20040124080753.97159.qmail@web61109.mail.yahoo.com>

hi,
 i was reading the manual for sys module. i found a
description for a function known as exitfunc. and it
says the function installed by
sys.exitfunc(cleanUpFunc) call will be called when the
interpreter exits. but when i try to call this
function on Python interactive prompt it says there is
no attribute named exitfunc in sys module.

###
>>> sys.exitfunc
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
AttributeError: 'module' object has no attribute
'exitfunc'
>>> dir(sys)
['__displayhook__', '__doc__', '__excepthook__',
'__name__', '__stderr__', '__stdin__', '__stdout_
_', '_getframe', 'api_version', 'argv',
'builtin_module_names', 'byteorder', 'call_tracing',
'call
stats', 'copyright', 'displayhook', 'dllhandle',
'exc_clear', 'exc_info', 'exc_type', 'excepthook'
, 'exec_prefix', 'executable', 'exit',
'getcheckinterval', 'getdefaultencoding',
'getfilesystemenc
oding', 'getrecursionlimit', 'getrefcount',
'getwindowsversion', 'hexversion', 'last_traceback', '
last_type', 'last_value', 'maxint', 'maxunicode',
'meta_path', 'modules', 'path', 'path_hooks', 'p
ath_importer_cache', 'platform', 'prefix', 'ps1',
'ps2', 'setcheckinterval', 'setprofile', 'setrec
ursionlimit', 'settrace', 'stderr', 'stdin', 'stdout',
'version', 'version_info', 'warnoptions', '
winver']
###

i am wondering that only i dont have this in my sys
module or it is being deleted from sys module. and if
only i dont have this function what reason it could be
that i dont have this function.

### Version information
>>> sys.version
'2.3.3 (#51, Dec 18 2003, 20:22:39) [MSC v.1200 32 bit
(Intel)]'

Thanks,
Hameed Khan

__________________________________
Do you Yahoo!?
Yahoo! SiteBuilder - Free web site building tool. Try it!
http://webhosting.yahoo.com/ps/sb/



From srsy70 at yahoo.com  Mon Jan 19 10:24:50 2004
From: srsy70 at yahoo.com (S.Ramaswamy)
Date: 19 Jan 2004 07:24:50 -0800
Subject: ConfigParser - setting the order of  options in a section
Message-ID: <e10307b1.0401190724.6ef7fa69@posting.google.com>

I am trying unsuccessfully to set the order of options using  the
set(section,option,value) method ( Python 2.2.2) and writing to a
file. But the options always appear in a random order. Before each
option I am writing a comment line using set(section,"#",value) - a
one line explanation for the option that follows - but the comments
get re-ordered randomly.

------------------------------------------------------------------------------------
cfg.add_section("COOL")
cfg.set("COOL","#","This is option A001")
cfg.set("COOL","A001","1")
cfg.set("COOL","#","This is option B001")
cfg.set("COOL","B001","2")
cfg.set("COOL","#","This is option C001")
cfg.set("COOL","C001","3")
cfg.write(file)
-------------------------------------------------------------------------------------


The comments for the options get jumbled up - I want them to be
written before the option=value line. Instead the comments for options
A001,B001,C001 all get ordered randomly.

Any help  in getting the sections to be written in order will be
appreciated.

srsy

-


From gerrit at nl.linux.org  Thu Jan 15 13:01:41 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Thu, 15 Jan 2004 19:01:41 +0100
Subject: TUPLE & LIST
In-Reply-To: <cbad00ljgqjc1dpm4quo8skjd3obc2m154@4ax.com>
References: <%7xNb.55$Uw3.50@newsr2.u-net.net>
	<cbad00ljgqjc1dpm4quo8skjd3obc2m154@4ax.com>
Message-ID: <20040115180141.GA5217@nl.linux.org>

Christos TZOTZIOY Georgiou wrote:
> Examples:
> Use a list for a list of names.
> Use a tuple for (x,y) coordinates in some area.
> Use a list of (name,phone,address) tuples for your poor man's address
> book which you will implement in python.

What if someone moves away?
That is, I think one could better use a mutable type for the address book.

yours,
Gerrit.

-- 
46. If he do not receive a fixed rental for his field, but lets it on
half or third shares of the harvest, the grain on the field shall be
divided proportionately between the tiller and the owner.
          -- 1780 BC, Hammurabi, Code of Law
-- 
PrePEP: Builtin path type
    http://people.nl.linux.org/~gerrit/creaties/path/pep-xxxx.html
Asperger's Syndrome - a personal approach:
	http://people.nl.linux.org/~gerrit/english/



From nomail at nospam.net  Tue Jan 13 05:19:23 2004
From: nomail at nospam.net (Olaf Meyer)
Date: Tue, 13 Jan 2004 10:19:23 GMT
Subject: problems with dict() in python 2.2
In-Reply-To: <just-491005.11132613012004@news1.news.xs4all.nl>
References: <shPMb.6507$k4.144431@news1.nokia.com>
	<just-491005.11132613012004@news1.news.xs4all.nl>
Message-ID: <LCPMb.6511$k4.144926@news1.nokia.com>

Just wrote:

> In article <shPMb.6507$k4.144431 at news1.nokia.com>,
>  Olaf Meyer <nomail at nospam.net> wrote:
> 
> 
>>I'm trying to build a dictionary using python's dict type, but somehow 
>>it does not work the way I expect it to. Here's the code:
>>
>>Python 2.2.1 (#7, Jan  9 2004, 16:59:31) [C] on hp-ux11
>>Type "help", "copyright", "credits" or "license" for more information.
>> >>> data=dict(red=1)
>>Traceback (most recent call last):
>>   File "<stdin>", line 1, in ?
>>TypeError: 'red' is an invalid keyword argument for this function
>>
>>What am I doing wrong?
> 
> 
> You're using a 2.3 feature in 2.2.
> 
> Just

Allright, I thought it was 2.2. Too bad, since I cannot get 2.3 compiled 
on HP-UX.

Olaf


From tcdelaney at optusnet.com.au  Tue Jan 20 01:20:52 2004
From: tcdelaney at optusnet.com.au (Tim Delaney)
Date: Tue, 20 Jan 2004 17:20:52 +1100
Subject: speedy Python strings?
References: <buhtjb$ida$1@news.rz.uni-karlsruhe.de>
	<roy-96DC3A.20024419012004@reader2.panix.com>
	<20040119185543.ABC7.JCARLSON@uci.edu>
Message-ID: <400cc8c4$0$26115$afc38c87@news.optusnet.com.au>

"Josiah Carlson" <jcarlson at uci.edu> wrote:

> Deleting from the front of a list results in every item being
> shifted up a single entry.  While this is insignificant for
> short lists, it is significant for long lists:

Note that there's been some very interesting discussions on python-dev
recently that may end up alleviating this issue somewhat in the future - but
no promises - there doesn't appear to be a consensus on the "right way" ...

Tim Delaney




From ddw at missioncriticalit.com  Thu Jan 22 12:00:55 2004
From: ddw at missioncriticalit.com (Dominique de Waleffe)
Date: Thu, 22 Jan 2004 18:00:55 +0100
Subject: Simple requests sequentialiser?
Message-ID: <401001C7.8010005@missioncriticalit.com>

I have a need to have a simple multithreaded sort of proxy wich listens 
to a given port and for each client session,
sends the requests to a single server (mono thread and listening on one 
single port) that sits behind and returns the answers to the appropriate 
client.

I confess that I have spent very little time on finding a solution to 
this yet. I have a feeling that this should be a piec of cake for 
python  possibly with twisted or even without  it....

Is there anyone that can give me a pointer to an example or to a 
specific place in the voluminous documentation of python and tools for 
such a thing....

Thansk,
D.
-- 

Dominique de Waleffe   Email: ddw at missioncriticalit.com [No HTML please]
Mission Critical, Dr?ve Richelle 161 B?t N, B-1410 Waterloo, Belgium  
Phone: +32 2 757 10 15  Fax: +32 2 759 27 60
ICQ: 289-306-495





From k.robert at gmx.de  Mon Jan 19 12:22:25 2004
From: k.robert at gmx.de (Robert)
Date: Mon, 19 Jan 2004 18:22:25 +0100
Subject: interface to win job scheduler portable from win98 .. winXP /
	cmdline or COM ?
Message-ID: <400c134c$0$9745$9b622d9e@news.freenet.de>

I found the os.popen("AT /?") way ....
however it works not on Win98 and the "Day" you enter at the AT are language
dependent.  (e.g. Mi(ttwoch) in german, We(dnesday) in english Windows
versions)

I need a solution work from Win98..WinXP most independent from
internationalization etc.

is there portable way - or at all a way to manipulate the Win98/ME scheduler
?
if no simple means, even COM stuff would be ok.
any pointers?

robert




From phleum_nospam at chello.se  Fri Jan  9 16:45:13 2004
From: phleum_nospam at chello.se (Carl)
Date: Fri, 09 Jan 2004 22:45:13 +0100
Subject: Python is far from a top performer according to benchmark
	test...
References: <ryELb.238$tK2.228@amstwist00> <btn5db$2f8$1@absinth.dialog.net.pl>
Message-ID: <B7FLb.246$tK2.177@amstwist00>

Krzysztof Stachlewski wrote:

> "Carl" <phleum_nospam at chello.se> wrote in message
> news:ryELb.238$tK2.228 at amstwist00...
> 
>> I have been experimenting with numerical algorithms in Python with a
>> heavy use of the Numeric module. My experience is that Python is quite
>> fast in comparison with (and sometimes as fast as) traditional languages
>> such as C or C++.
> 
> With "heavy use of Numeric module" you were calling functions
> written in C. So how can you say that Python is fast,
> when C code is doing all the work.
> 
> Stach

Well, I guess you are right! 

What I meant was that when I run my Python algorithm it runs "almost as fast
as" when I run similar code in C or C++. This is of course due to the
highly efficient Numeric module. However, the point is that Python is a
viable language from a numerical perspective.

Carl


From gerrit at nl.linux.org  Fri Jan 23 07:20:27 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Fri, 23 Jan 2004 13:20:27 +0100
Subject: strtotime?
In-Reply-To: <40106680.849ADEFA@engcorp.com>
References: <kvYPb.242$af7.175373@newshog.newsread.com>
	<40105afb$0$319$e4fe514c@news.xs4all.nl>
	<bwZPb.244$af7.182636@newshog.newsread.com>
	<40106680.849ADEFA@engcorp.com>
Message-ID: <20040123122027.GA2914@nl.linux.org>

Peter Hansen wrote:
> Leif K-Brooks wrote:
> > Irmen de Jong wrote:
> > >> PHP has a very nice strtotime function (http://php.net/strtotime)
> > >> which converts a date/time in virtually any format into a timestamp.
> > >> Does Python have a similar function?
> > >
> > > I guess you're looking for:  time.strptime
> > 
> > Thanks, but no. PHP's strtotime() function magically guesses the format
> > on its own, time.strptime() just uses a fixed format.
> 
> Perhaps the mx.DateTime package would help:

Or DateUtil:

https://moin.conectiva.com.br/DateUtil

>>> parse("3rd of May 2001")
datetime.datetime(2001, 5, 3, 0, 0)

yours,
Gerrit.

-- 
6. If any one steal the property of a temple or of the court, he shall
be put to death, and also the one who receives the stolen thing from him
shall be put to death.
          -- 1780 BC, Hammurabi, Code of Law
-- 
PrePEP: Builtin path type
    http://people.nl.linux.org/~gerrit/creaties/path/pep-xxxx.html
Asperger's Syndrome - a personal approach:
	http://people.nl.linux.org/~gerrit/english/



From swalters_usenet at yahoo.com  Mon Jan  5 16:06:43 2004
From: swalters_usenet at yahoo.com (Samuel Walters)
Date: Mon, 05 Jan 2004 21:06:43 GMT
Subject: explicit variable declaration
References: <wa9Kb.2393503$uj6.5826057@telenews.teleline.es>
Message-ID: <pan.2004.01.05.21.05.32.783610@yahoo.com>

|Thus Spake Luis Sol?s On the now historical date of Mon, 05 Jan 2004
08:23:56 +0000|

> Hi
> It is possible to declare some variables as int, long... ? , or something
> like visual basic option explicit.
> In some situations could be usefull.
> Thanks

Well, in python, that is left to programmer's discretion.
Once you get used to it, it's less of a hassle and danger zone than you'd
expect.

You can read GvR's (Our Benevolent Dictator For Life) thoughts 
on contracts in python here:
http://www.artima.com/intv/pycontract.html

As a fallback, you can always use the isinstance() and type() functions to
check what type of variable you have on hand.
 
Generally, isinstance is what you want to use because it returns true for
subclasses.  If the subclass doesn't do everything you'd expect of it's
superclass, then either your or the subclass writer have broken their
contract.

If you absotively posolutely must know that a variable is a certain class,
not a subclass and nothing but the bona fide variable type you expected,
then use type().  This, however, is seldom the case because using type()
could prevent future programmers from extending your code.

If you want even more assurances, look into pylint and pychecker:
http://www.logilab.org/projects/pylint
http://pychecker.sourceforge.net/

HTH

Sam Walters.

p.s. The python-tutor list is probably a better place to ask questions
like this.  You're most likely to get helpful answers to questions about
the basics than you are here.

-- 
Never forget the halloween documents.
http://www.opensource.org/halloween/
""" Where will Microsoft try to drag you today?
    Do you really want to go there?"""



From __peter__ at web.de  Thu Jan  8 11:51:01 2004
From: __peter__ at web.de (Peter Otten)
Date: Thu, 08 Jan 2004 17:51:01 +0100
Subject: Calling a function dynamically
References: <924a9f9c.0401080742.39eba581@posting.google.com>
Message-ID: <btk1i4$ca4$02$1@news.t-online.com>

Paradox wrote:

> I would like to call a function whose name I supply at runtime.
> Something like this but it didn't work
> 
> functionName = 'run'
> instance = ClassDef()
> args = [1, 2]
> 
> #want the dynamic equivalant of
> #instance.run(*args)
> 
> #This didn't work cause there was no __call__ attribute. Why?
> value = instance.__call__[functionName](*args)

The __call__() method is implicitly invoked when you write

value = instance(some, args)

Here's a way to abuse the [] operator (implemented by __getitem__()) to
dynamically select a method:

>>> class Test:
...     def __getitem__(self, name):
...             return getattr(self, name)
...     def run(self, *args):
...             print "run%s" % (args,)
...
>>> t = Test()
>>> t["run"]
<bound method Test.run of <__main__.Test instance at 0x40295b0c>>

"bound method" means that both instance and method are stored, so that
for the actual call you need not provide an explicit self parameter:

>>> t["run"]("alpha", "beta", "gamma")
run('alpha', 'beta', 'gamma')


Peter



From mborgerding at cinci.rr.com  Sat Jan 17 14:27:19 2004
From: mborgerding at cinci.rr.com (Mark Borgerding)
Date: Sat, 17 Jan 2004 19:27:19 GMT
Subject: yield
In-Reply-To: <mailman.456.1074358567.12720.python-list@python.org>
References: <mailman.456.1074358567.12720.python-list@python.org>
Message-ID: <r0gOb.16619$DE.11372@fe2.columbus.rr.com>

km wrote:
> Hi all,
> 
> i didnt understand the purpose of  'yield' keyword and the concept of 'generators' in python.  can someone explain me with a small example how  generators differ from normal function calls?
> kindly enlighten
> regards,
> KM
> 

I think of it as an "interrupt" that provides a value back to the caller 
for each value in a sequence.  It can also be loosely thought of as an 
iterator(sort of).



Here's an example that may (or may not) help:


def foo():
     print 'entering foo function'
     for i in range(3):
         print 'yielding %s' % i
         yield i
     print 'leaving foo function'

for x in foo():
     print  'x is %s' % x

################
prints out the following:

entering foo function
yielding 0
x is 0
yielding 1
x is 1
yielding 2
x is 2
leaving foo function



From piet at cs.uu.nl  Mon Jan 26 04:58:27 2004
From: piet at cs.uu.nl (Piet van Oostrum)
Date: 26 Jan 2004 10:58:27 +0100
Subject: compress string of data
References: <bv0gev$2ni$1@nsnmrro2-gest.nuria.telefonica-data.net>
	<mailman.765.1075042168.12720.python-list@python.org>
Message-ID: <wz4quj116k.fsf@nono.cs.uu.nl>

>>>>> Gerrit Holl <gerrit at nl.linux.org> (GH) wrote:

>> How i could compress string of data?.
>>>> import zlib
>>>> zlib.compress("Hello, world")
GH> 'x\x9c\xf3H\xcd\xc9\xc9\xd7Q(\xcf/\xcaI\x01\x00\x1b\xd4\x04i'

GH> http://www.python.org/doc/current/lib/module-zlib.html

Waw, that compresses it from 12 bytes to 20 bytes :=)
-- 
Piet van Oostrum <piet at cs.uu.nl>
URL: http://www.cs.uu.nl/~piet [PGP]
Private email: P.van.Oostrum at hccnet.nl


From peter at engcorp.com  Fri Jan  9 09:35:22 2004
From: peter at engcorp.com (Peter Hansen)
Date: Fri, 09 Jan 2004 09:35:22 -0500
Subject: silent  saveas ?
References: <mailman.211.1073636499.12720.python-list@python.org>
Message-ID: <3FFEBC2A.CFA39FA3@engcorp.com>

Please don't post HTML to this list/newsgroup.

> I?m having difficulties to save the web browser in silent
 when I try to use
> WebBrowser1.ExecWB OLECMDID_SAVEAS, OLECMDEXECOPT_DONTPROMPTUSER, "c:\blank.html", 
> "c:\blank.html"
> The save window keep prompting up. How can I keep the save window in silent? 
> Please help me, Thanks a lot
 
To answer your question as best I can: have you checked the Microsoft
documentation for WebBrowser1?  Surely it will answer the question for
you...  at the least, there's nothing Python-related in your question,
and your code doesn't even appear to be Python, so I'm not sure why
you're posting here.

(Note: if that was really supposed to be Python, you should know that
using a \b in a string like that will not generate a backslash and a
"b", but will actually generate a single BACKSPACE character.)

-Peter


From tzot at sil-tec.gr  Tue Jan 13 12:45:09 2004
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Tue, 13 Jan 2004 19:45:09 +0200
Subject: Does anyone else not find the fun in programming...?
References: <d232c5e.0401130823.27fd26ff@posting.google.com>
	<bu19ho$j0n$1@news-reader2.wanadoo.fr>
Message-ID: <4hb800hefrkre2p12o6pijr5lb2pui55n2@4ax.com>

On Tue, 13 Jan 2004 18:28:13 +0100, rumours say that Rony
<bucodi_no_spam at ahoo.fr> might have written:

[snip: Chris Lyon doubts that programming is fun]

>> Do I need help ?
>> 
>> (Actually typing this was quite fun, so perhaps)

[Rony]
>Well I agree...
>Meeting people, having a drink with them, sex.. is fun
>
>Programming is just a job

Programming can be fun if seen as creation.  It's hard to be fun when
you do what others request, but it *is* fun when you write programs for
your own reasons...
-- 
TZOTZIOY, I speak England very best,
Ils sont fous ces Redmontains! --Harddix


From wilkSPAM at OUTflibuste.net  Fri Jan 16 17:00:30 2004
From: wilkSPAM at OUTflibuste.net (Wilk)
Date: Fri, 16 Jan 2004 23:00:30 +0100
Subject: py2exe 0.5.0 (finally) released
References: <y8s7aeps.fsf@python.net>
Message-ID: <87wu7rpn9d.fsf@blakie.riol>

Hi,

I just try this new release with the simple sample, it throw an
exception :

Traceback (most recent call last):
  File "setup.py", line 34, in ?
    console = ["hello.py"],
  File "C:\PYTHON23\lib\distutils\core.py", line 149, in setup
    dist.run_commands()
  File "C:\PYTHON23\lib\distutils\dist.py", line 907, in run_commands
    self.run_command(cmd)
  File "C:\PYTHON23\lib\distutils\dist.py", line 927, in run_command
    cmd_obj.run()
  File "C:\PYTHON23\Lib\site-packages\py2exe\build_exe.py", line 197, in run
    self.create_binaries(py_files, extensions, dlls)
  File "C:\PYTHON23\Lib\site-packages\py2exe\build_exe.py", line 391, in create_
binaries
    arcname, target.script)
  File "C:\PYTHON23\Lib\site-packages\py2exe\build_exe.py", line 590, in build_e
xecutable
    self.add_versioninfo(target, exe_path)
  File "C:\PYTHON23\Lib\site-packages\py2exe\build_exe.py", line 609, in add_ver
sioninfo
    from py2exe.resources.VersionInfo import Version, RT_VERSION
  File "C:\PYTHON23\Lib\site-packages\py2exe\py2exe.py", line 3, in ?
    raise RuntimeError, "something's wrong"
RuntimeError: something's wrong

hello.exe works indeed

I try it on win98 and winNT, with last python2.3.3

There is no unicode file do download for winNT ?

bye

-- 
Wilk - http://flibuste.net


From llothar at web.de  Mon Jan 12 14:09:54 2004
From: llothar at web.de (Lothar Scholz)
Date: 12 Jan 2004 11:09:54 -0800
Subject: Python is far from a top performer according to benchmark
	test...
References: <ryELb.238$tK2.228@amstwist00> <btn5db$2f8$1@absinth.dialog.net.pl>
	<pan.2004.01.09.21.35.40.132608@yahoo.com>
	<6ee58e07.0401092129.302cb9d4@posting.google.com>
	<pan.2004.01.11.06.08.18.867825@yahoo.com>
	<6ee58e07.0401120542.5d79090d@posting.google.com>
	<qnk8ykdp3a0.fsf@arbutus.physics.mcmaster.ca>
Message-ID: <6ee58e07.0401121109.52d5dc56@posting.google.com>

cookedm+news at physics.mcmaster.ca (David M. Cooke) wrote in message news:<qnk8ykdp3a0.fsf at arbutus.physics.mcmaster.ca>...
> At some point, llothar at web.de (Lothar Scholz) wrote:
> 
> > Samuel Walters <swalters_usenet at yahoo.com> wrote in message news:<pan.2004.01.11.06.08.18.867825 at yahoo.com>...
> >
> >> I know very little about numeric processing, and even less about Fortran.
> >> It's true that my background is in mathematics, but in *pure* mathematics
> >> where pointer-based languages tend to be helpful, not hurtful.  
> >
> > Okay seems that you don't know a lot about compiler writing.
> >
> > A C compiler only knows a little bit about the context so it must
> > always assume that a data inside a member can be referenced from
> > another place via an alias pointer.
> >
> > Fortran does not have this problem so a lot of optimizations can be
> > done and values can be hold in registers for a much longer time,
> > resulting in much greater speed.
> >
> > Remember that on supercomputers a 25% spped enhancement (which a good
> > fortran compiler is faster then C) can mean a few million dollars of
> > saved hardware costs. The coding time is not importing compared to the
> > running time. So real hard numerics are always done in Fortran.
> >
> > GNU Fortran is a stupid project because it translates the Fortran code
> > to C.
> 
> Err, no. You're thinking of f2c. GNU Fortran uses the same backend as
> the GNU C compiler, in that it translates to the same intermediate
> language (sort of assembly language) on which optimizations are done.
> But the C front end and the Fortran front end are separate.
> 

But the front end is, as far as i know, only responsible for syntax
analysis. All code generation like control flow analysis, register
allocation etc. is done on the intermediate 3 register language. And
the hints you could get from the fortran language are simply unused.

But i must say that i never used Fortran (when i studied physics) in
the last 15 years for any real programming. I only wanted to point out
that a lot of languages are by design faster then C. Fortran was one
of these. You can find articles on the web where the same is explained
for lisp and functional languages.

C and C++ is not a good compilation language when it comes to compiler
optimization.


From tjreedy at udel.edu  Thu Jan  8 14:07:11 2004
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 8 Jan 2004 14:07:11 -0500
Subject: Name of the function
References: <9e5ea2c4.0401080640.64ef5d58@posting.google.com>
	<btjuct$84v33$1@ID-217427.news.uni-berlin.de>
Message-ID: <VN-dnbgcxbPKN2CiRVn-iQ@comcast.com>


"anton muhin" <antonmuhin at rambler.ru> wrote in message
news:btjuct$84v33$1 at ID-217427.news.uni-berlin.de...
> Olaf Meding wrote:
> > I am looking for a way to get at the name of the function (while
> > executing code inside the function) without (!) knowing the name of
> > the function.
> >
> This seems to work:
>
> def foo():
>      print inspect.currentframe().f_code.co_name

as does this ...

>>> def f(): print f.func_name
...
>>> f()
f
... as long as 'f' remains bound to that function in the same module, which
it will unless rebound either from within or without.

Terry J. Reedy




From bart_nessux at hotmail.com  Fri Jan 23 14:43:37 2004
From: bart_nessux at hotmail.com (Bart Nessux)
Date: Fri, 23 Jan 2004 14:43:37 -0500
Subject: when x process isn't running... do something
Message-ID: <burtha$5ck$1@solaris.cc.vt.edu>

Howdy,

I'm trying to time how long it takes dd to run on a G5, versus how long 
it takes to run on a G4 (PATA vs. SATA). Both sytems have Mac OS X 
10.3.2 and Python 2.3. Could someone demonstrate how I might use Python 
to monitor for the presense of a process and to do something (in this 
case send an email which I know how to do) as soon as that process is no 
longer present? Any suggestions on how to monitor? Call top every 5 secs 
and read it's output searching for 'dd'???

TIA,
Bart



From jcarlson at nospam.uci.edu  Fri Jan 30 03:33:36 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Fri, 30 Jan 2004 00:33:36 -0800
Subject: mod_speling for python
In-Reply-To: <9d1c4d6d.0401282106.d69b2c5@posting.google.com>
References: <9d1c4d6d.0401282106.d69b2c5@posting.google.com>
Message-ID: <bvd514$3bv$1@news.service.uci.edu>

> I know there are drawbacks, disadvantages, this is "evil", etc.  I
> only wanted to know what ways there are to add such a hook if it is
> possible without altering the C source for python itself.

Ambiguities during execution are bad.  I've got two functions Foo and 
foO, if I type in foo, what did I mean?

  - Josiah


From gumuz at looze.net  Thu Jan 15 08:43:50 2004
From: gumuz at looze.net (Guyon Morée)
Date: Thu, 15 Jan 2004 14:43:50 +0100
Subject: QT usage confusion
Message-ID: <40069912$0$251$4d4ebb8e@news.nl.uu.net>

hmmm, all this time that I am fooling around with python I never took a good
look at (py)QT.
I want to have a go at it, after being a bit disapointed about the
alternatives.

I have read multiple docs about it and searched this newsgroup I came to the
conclusion that, as I am a windows user, I have only 2 options:

- buy a commercial qt license
- try it out for 30 days (!)

that sucks ;)

am I wrong?
please tell me I'm wrong.




From enleverca-bknews at ifrance.com  Tue Jan 13 12:41:36 2004
From: enleverca-bknews at ifrance.com (=?ISO-8859-1?Q?=22C=E9dric_V=2E=22?=)
Date: Tue, 13 Jan 2004 18:41:36 +0100
Subject: error at "import anydbm"
Message-ID: <40042edd$0$24038$626a54ce@news.free.fr>

Hi,

I am unable to import anydbm without error under Python2.2 or 2.3 (Linux).

this script:
 >#!/usr/bin/env python
 >import anydbm
 >
 >if __name__ == "__main__":
 >    db = anydbm.open("test", "rwc")
 >    db["test"] = "ok"


returns at execution:

 >cedric at dev _test $ python dbm.py
 >Traceback (most recent call last):
 >  File "dbm.py", line 2, in ?
 >    import anydbm
 >  File "/usr/lib/python2.3/anydbm.py", line 59, in ?
 >    _errors.append(_mod.error)
 >AttributeError: 'module' object has no attribute 'error'


(the same with python2.2)


do I have forgotten something? or is it another problem?

thanks in advance,

-- CV



From mwh at python.net  Thu Jan 15 06:13:06 2004
From: mwh at python.net (Michael Hudson)
Date: Thu, 15 Jan 2004 11:13:06 GMT
Subject: Why learn Python ??
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<pan.2004.01.12.20.18.36.606924@yahoo.com>
	<4003cfeb$0$19263$626a54ce@news.free.fr>
	<i7ib00tsj8p97qm42h2f0l216f3ftugrvh@4ax.com>
Message-ID: <m3fzehwjlq.fsf@pc150.maths.bris.ac.uk>

Christos "TZOTZIOY" Georgiou <tzot at sil-tec.gr> writes:

> On Tue, 13 Jan 2004 12:21:00 +0100, rumours say that Bruno Desthuilliers
> <bdesth.tagada at tsoin-tsoin.free.fr> might have written:
> 
> ><troll>
> >Woops ! The problem with Perl is actually that it's more or less a 
> >write-only language !-)
> ></troll>
> 
> I think you mean Perl is a WORN language (Write Once, Read Never).

WORA (Write Once, Run Away)?

Cheers,
mwh

-- 
  Worryingly, DEFUN appears to be a function that removes all the
  fun from something: after using it all your code is converted 
  to C++.                              -- Tim Bradshaw, comp.lang.lisp


From aldo123 at onet.pl  Mon Jan 26 09:46:25 2004
From: aldo123 at onet.pl (mic)
Date: Mon, 26 Jan 2004 15:46:25 +0100
Subject: weird COM hazard
References: <bur8es$17af$1@news.atman.pl>
	<busi9f$tlj$1@arachne.labyrinth.net.au>
Message-ID: <bv39ap$29c6$1@news.atman.pl>

I've found the walkaround by setting within the child event class

constructor the local attribute that's equal to the external status class. I

can then reach the status without previously mentioned, random exceptions.

Strange, but works ok. Now I'm just investigating why my COM proxy object

returns at first string 'Microsoft Internet Explorer' and after a while:

win32com.client.COMEventClass. Does anyone know why?




From mcherm at mcherm.com  Mon Jan  5 09:51:58 2004
From: mcherm at mcherm.com (Michael Chermside)
Date: Mon,  5 Jan 2004 06:51:58 -0800
Subject: [Python-Dev] PEP 324: popen5 - New POSIX process module
Message-ID: <1073314318.3ff97a0e68ffe@mcherm.com>

Peter writes:
> There's a new PEP available:
> 
> PEP 324: popen5 - New POSIX process module
> 
> A copy is included below. Comments are appreciated. 

Just one really minor suggestion: in the class Popen, the default values
for the arguments close_fds and universal_newlines should be False not 0.

And I vote +1 on changing the name from "popen5" to something else.
"process" (as suggested in the PEP) isn't too bad, but I'd certainly be
open to another name. If this is to replace the entire rest of the popenX
family for most normal purposes, a separate, more comprehensible name
will help newbies find it.

-- Michael Chermside





From jzgoda at gazeta.remove-this.pl  Tue Jan 20 14:29:41 2004
From: jzgoda at gazeta.remove-this.pl (Jarek Zgoda)
Date: Tue, 20 Jan 2004 19:29:41 +0000 (UTC)
Subject: python As400
References: <mailman.538.1074596683.12720.python-list@python.org>
Message-ID: <bujvj4$h5u$2@nemesis.news.tpi.pl>

Enrique <enrique.palomo at xgs-spain.com> pisze:

> I'm very interested in python for AS/400. I must migrate an application that
> is running under windows to AS/400.
> Has anyone worked with python in that platform??

Yes, with real pleasure. ;)

> what about performace??

Worse than CL/RPG, similar to Java, better than REXX -- in case of batch
jobs. Didn't try running Python scripts interactively.

> The scripts are basicly of string manipulation and i/o.

Check http://www.iseriespython.com/

-- 
Jarek Zgoda
Unregistered Linux User #-1
http://www.zgoda.biz/ JID:zgoda-a-chrome.pl http://zgoda.jogger.pl/


From mcfletch at rogers.com  Thu Jan 22 00:08:10 2004
From: mcfletch at rogers.com (Mike C. Fletcher)
Date: Thu, 22 Jan 2004 00:08:10 -0500
Subject: [Numpy-discussion] Status of Numeric
In-Reply-To: <8g7u001k257pr6tjl3ng9t7pn3gvbq2328@4ax.com>
References: <CEELJPECNGEGKFNDLHFFGEBKCCAA.perry@stsci.edu>	<mailman.533.1074574795.12720.python-list@python.org>	<bumghc$dsb$1@nrc-news.nrc.ca>	<vpmt0058gq2hj2q8jh8pakm9d80eridvmv@4ax.com>	<mailman.617.1074727375.12720.python-list@python.org>
	<8g7u001k257pr6tjl3ng9t7pn3gvbq2328@4ax.com>
Message-ID: <400F5ABA.3090608@rogers.com>

Arthur wrote:

>On Wed, 21 Jan 2004 16:22:43 -0700, Tim Hochberg
><tim.hochberg at ieee.org> wrote:
>  
>
...

>>The first is that last I heard the crossover point where 
>>Numarray becomes faster than Numeric is about 2000 elements. It would be 
>>nice if that becomes smaller, but I certainly wouldn't call it extreme. 
>>In fact I'd venture that the majority of cases where numeric operations 
>>are a bottleneck would already be faster under Numarray. In my 
>>experience, while it's not uncommon to use short arrays, it is rare for 
>>them to be a bottleneck.
>>    
>>
>
>Couldn't one argue that - for example - in 3d graphic applications the
>performance as to short arrays is crucial.
>  
>
I would imagine so, but then I'm a 3D guy, and really, the numeric 
community is not AFAIK mostly 3D guys.  Most in the numeric community 
seem to be the scientific guys, who want to deal with really big 
arrays.  Moderately sized scenegraphs are going to have 1000s of nodes 
with 3 or 4 matrices each (each matrix being 3, 4, or occasionally 16 
values) and then a few hundred larger matrices for defining 
vertex/colour/normal/texture content, plus a few hundred matrices 
created/destroyed per frame (1/60th of a second or so)).  But then most 
Python scenegraph engines (OpenGLContext being the only counterexample 
of which I know) are going to simply expose such matrices from their 
C/C++ engine, not use Num* arrays.

Memory would likely be the most critical question for such 
applications.  Not sure how much extra overhead is really being 
discussed.  4000 extra dictionary-based instances could really add up 
memory-wise.  But a 20 or 30 byte overhead/matrix isn't likely going to 
kill anything that performs adequately in Python to begin with.

>But hoping that in fact numarray does come to be accepted as the
>"standard".  
>  
>
AFAIK we still can't compile PyOpenGL with numarray, so I suppose I'm on 
the fence :) .  Should really figure out what makes it fail some day 
soon I suppose.

>>The second point is the relative speediness of Numeric at low array 
>>sizes is the result that nearly all of it is implemented in C, whereas 
>>much of Numarray is implemented in Python.
>>    
>>
>
>Good for me.  I'll be able to understand more of it.
>  
>
Hmm, this does concern me a little.  3D graphics needs to do a lot of a 
very small number of operations (dot and cross product, and basic 
add/multiply/divide mostly).  If each of those calls is going through an 
extra Python layer, there might be pretty significant slowdowns.

>>This results in a larger 
>>overhead for Numarray, which is why it's slower for small arrays. As I 
>>understand it, the decision to base most of Numarray in Python was 
>>driven by maintainability; it wasn't an attempt to optimize large arrays 
>>at the expense of small ones.
>>    
>>
>
>I was indeed making an assumption here.  Ifs its wrong, its indeed
>wrong.
>  
>
Sounds as though the Python layer is being used to dispatch C or C++ 
coded functions on internal structures of the array, which would be 
consistent with the optimisation pattern (larger the dispatched 
operation, the less percentage overhead involved).

>For reasons that are non-technical, I believe it much to the best that
>the community continue to look to one package of the sort as a
>standard.  To me. even better if it makes it into the core
>distribution.
>  
>
Core or not doesn't really concern me.  But definitely one standard.  
Even now, we're starting to get users stymied by having Numarray and 
having it pretend to be Numpy so that PyOpenGL craps out with nasty 
errors when it tries to do anything with Numpy.

Enjoy,
Mike

_______________________________________
  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://members.rogers.com/mcfletch/





From nuffsaid at phreaker.net  Mon Jan 19 16:06:18 2004
From: nuffsaid at phreaker.net (Nuff Said)
Date: Mon, 19 Jan 2004 22:06:18 +0100
Subject: Tkinter color names/codes
References: <Xns94759F3BCD0B7jseale18insightbbcom@204.127.199.17>
Message-ID: <pan.2004.01.19.21.06.17.957950@phreaker.net>

On Mon, 19 Jan 2004 20:39:18 +0000, Jeff Seale wrote:

> I just happend to notice that there are very FEW colors that you have to 
> generate using #hex codes. But I was wondering, how many colors have names 
> assigned to them in Tkinter and what are their #hex translations? It'd be 
> nice to know these so I don't accidentally create a color that already has 
> a name.

http://wiki.tcl.tk/8606
    - list with all named colors in Tcl/Tk

http://wiki.tcl.tk/colors
    - W3C names, hex codes and Tcl/Tk names for the 
      16 HTML 3.2 colors (i.e. the basic VGA set)

HTH / Nuff


From newsgroups at jhrothjr.com  Thu Jan 15 22:12:22 2004
From: newsgroups at jhrothjr.com (John Roth)
Date: Thu, 15 Jan 2004 22:12:22 -0500
Subject: keeping Python code properly indented
References: <3064b51d.0401151125.711ade4c@posting.google.com>
Message-ID: <100elmgcoiva8a@news.supernews.com>


<beliavsky at aol.com> wrote in message
news:3064b51d.0401151125.711ade4c at posting.google.com...
> How do you keep Python code properly indented as you modify it? I use
> an Emacs-type editor that has a Python mode, so the initial indenting
> is easy. If I later want to put a 'for' loop (or an 'if' statement)
> around a bunch of code, I find myself going through the body of the
> loop, manually re-indenting to keep the nested loops correct. There
> should be a better way.
>
> I think that having a 'for' loop end with a matching 'next' statement,
> as done in (for example) Basic, is a safer and clearer way of writing
> loops, although some Python programmers consider this a 'feature'
> rather than a 'bug'.

Just about every editor in existence allows you to select a range
of lines and indent or dedent them as a group. If your editor
doesn't let you do this, get a better editor.

John Roth




From skip at pobox.com  Tue Jan 13 18:05:31 2004
From: skip at pobox.com (Skip Montanaro)
Date: Tue, 13 Jan 2004 17:05:31 -0600
Subject: error at "import anydbm"
In-Reply-To: <Bh_Mb.15554$RV5.9386@fe2.texas.rr.com>
References: <40042edd$0$24038$626a54ce@news.free.fr>
	<4004482A.A66C2886@engcorp.com>
	<Bh_Mb.15554$RV5.9386@fe2.texas.rr.com>
Message-ID: <16388.31163.312989.480225@montanaro.dyndns.org>


    Paul> What if the standard library modules were put into a "std"
    Paul> package, to help get them out of the global import namespace?  (Of
    Paul> course, this would break *scads* of code, so maybe should be
    Paul> deferred to 3.0.  Or for migration purposes, implement this in a
    Paul> 2.x release, and provide shadow xxx imports that import the
    Paul> std.xxx modules.)

This has come up before.  It is definitely PEP territory.  I think it would
be a good idea, though in the short term (e.g., 2.4, 2.5) the best you can
probably hope for is that a std package and the current modules live
side-by-side.

A couple problems were raised during the last go-round on python-dev.  Any
PEP would have to address them:

    1. In a naive implementation these two statements:

        import std.sys
        import sys

       will result in two separate entries in sys.modules and thus the
       module level code will be executed twice.  During a transition period
       you have to assume that an application will have a combination of
       both styles of imports.

    2. A simple way to achieve a std package parallel to the current global
       namespace on Unix-y systems would be to use symbolic links.  This
       won't work on Windows.  You'd like to avoid duplicating modules, in
       part because it would probably make it harder to solve #1 above.

Skip



From skip at pobox.com  Mon Jan  5 07:00:53 2004
From: skip at pobox.com (Skip Montanaro)
Date: Mon, 5 Jan 2004 06:00:53 -0600
Subject: intellectual property agreements and open source . was - Re: Why
 does this fail? [2]
In-Reply-To: <vvi2i8b89928fa@corp.supernews.com>
References: <vvhdlm72386b3c@corp.supernews.com>
	<vvhkngs7oachad@corp.supernews.com>
	<84fc4588.0401042209.60cdb724@posting.google.com>
	<vvi2i8b89928fa@corp.supernews.com>
Message-ID: <16377.20981.968499.465567@montanaro.dyndns.org>


    Dave> How does participating in open source work for someone (me) who
    Dave> has signed the customary intellectual property agreement with the
    Dave> corporation that they work for? Since programming is part of my
    Dave> job, developing test solutions implemented on automatic test
    Dave> equipment (the hardware too) I don't know if I would/could be
    Dave> poison to an open source project. How does that work? 

Only your corporate counsel knows for sure. <wink>  Seriously, the degree to
which you are allowed to release code to an open source project and the
manner in which is released is probably a matter best taken up with your
company's legal department.  Some companies are fairly enlightened.  Some
are not.  You may need very little review to release bug fixes or test cases
(my guess is you might be pretty good at writing test cases ;-), more review
to release a new module or package, and considerable participation by
management and the legal eagles if you want to release a sophisticated
application into the wild.

In any case, if you make large contributions to an open source project such
as Python, I'm pretty sure a release form for substantial amounts of code
will be required at the Python end of things.  See here

    http://www.python.org/psf/psf-contributor-agreement.html

for more details.  Note that it hasn't been updated in a couple years.  I
don't know if MAL has something which is more up-to-date.

Skip



From achim.marcel at uqam.ca  Tue Jan 13 12:22:55 2004
From: achim.marcel at uqam.ca (Marcel Achim)
Date: Tue, 13 Jan 2004 17:22:55 GMT
Subject: tkinter canvas postscript fontmap
Message-ID: <PPVMb.30707$6N3.28252@charlie.risq.qc.ca>

Hi,

I want to set the fontmap to be used when saving the file. I write to
the canvas using Arial and would like to get either Arial or Courier in
the resulting .ps instead of MsSansSerif... I haven't found any sample
on the net. Has anyone done this before with success ? What is the
format of the "fontmap" option ?

thanks
Marcel


From bart_nessux at hotmail.com  Tue Jan 13 15:26:01 2004
From: bart_nessux at hotmail.com (Bart Nessux)
Date: Tue, 13 Jan 2004 15:26:01 -0500
Subject: Make a function call itself after set amount of time
In-Reply-To: <bu1g42$1bg$07$1@news.t-online.com>
References: <bu0v1v$qio$1@solaris.cc.vt.edu> <bu106b$s16$1@solaris.cc.vt.edu>
	<bu1g42$1bg$07$1@news.t-online.com>
Message-ID: <bu1k8p$1rh$1@solaris.cc.vt.edu>

Peter Otten wrote:
> Bart Nessux wrote:
> 
> 
>>Bart Nessux wrote:
>>
>>>How do I make a function call itself every 24 hours. Also, is there a
>>>way to start the program automatically w/o depending on the OS functions
>>>like 'Task Scheduler' or 'Start Up Items'... this is on Windows 2k and
>>>xp. Below is an example of what I'm trying to do.
> 
> 
> [...]
> 
> 
>>I figured it out. I added this to the function definition:
>>ipconfig_email()
> 
> 
> Note that Python has a limit for nesting functions:
> 
> 
>>>>depth = 0
>>>>def callself():
> 
> ...     global depth
> ...     depth += 1
> ...     callself()
> ...
> 
>>>>try:
> 
> ...     callself()
> ... except RuntimeError, e:
> ...     print "depth", depth
> ...     print e
> ...
> depth 999
> maximum recursion depth exceeded
> 
> 
>>>>999/365.25
> 
> 2.7351129363449691
> 
> This means that your app will probably crash in less than three years.
> Would that be a problem on W2K ?
> 
> If so, a loop could go much longer:
> 
> while True:
>     ipconfig_email()
> 
> Seriously, you should reconsider the OS features.
> 
> Peter
> 

The computers are turned off and on... the script starts at boot. I 
don't think I'll hit a limit, do you?



From loic at yermat.net1.nerim.net  Thu Jan  1 19:08:03 2004
From: loic at yermat.net1.nerim.net (Yermat)
Date: Fri, 2 Jan 2004 01:08:03 +0100
Subject: UML tools for python
References: <13dc97b8.0312301543.39192aa2@posting.google.com>
	<mailman.15.1072980620.12720.python-list@python.org>
Message-ID: <bt2cop$1c6o$1@biggoron.nerim.net>

"Rimidalv" <mahasamatman at nm.ru> a ?crit dans le message de
news:mailman.15.1072980620.12720.python-list at python.org...
> Andy Bulka wrote:
> > > [...]
> > Andy Bulka
> > http://www.atug.com/andypatterns
> Try Dia http://www.lysator.liu.se/~alla/dia/
> also  autodia http://droogs.org/autodia/
> and if you Google a little i guess that you can find dia2code (sorry
> couldn't find url)

Right but there is nothing where you can edit both code and diagram...
The question is which good editor to extend ?
ArgoUml seems good but do you know another one that is quite complete ?
Which one is easiest to extend ?
A program in java should it be extend in Jython ?
Cheers,
Yermat




From JasonHarper at pobox.com  Mon Jan 26 21:59:47 2004
From: JasonHarper at pobox.com (Jason Harper)
Date: Mon, 26 Jan 2004 19:59:47 -0700
Subject: JPG - PNG conversion problem
References: <mailman.796.1075125724.12720.python-list@python.org>
Message-ID: <4015D3C1.C4850255@pobox.com>

"Raaijmakers, Vincent (GE Infrastructure)" wrote:
> Who can explain the huge increase in size when I convert a JPG into a PNG format using PythonMagick:
> I read the JPG from a video server and has a resolution of 352x240, size is about 15k
> After my PNG conversion and resizing the resolution to 160*120, the size is 64k!!

JPEG is a lossy compression format (well, normally - there are some
obscure exceptions to this).  It throws away subtle details (details
that the human eye is relatively insensitive to) in order to achieve its
high compression ratios.

PNG uses only lossless compression.  You are guaranteed that the image
you get out will be pixel-for-pixel identical to the image you put in. 
Unfortunately, this greatly limits the possibilities for compression -
in fact, no lossless compressor can guarantee ANY reduction in file size
over all possible inputs.

Basically, converting a lossy to a lossless format gives you worst of
both worlds - the loss of detail of one, and the large file size of the other.
	Jason Harper


From ptmcg at users.sourceforge.net  Tue Jan 13 17:27:45 2004
From: ptmcg at users.sourceforge.net (Paul McGuire)
Date: Tue, 13 Jan 2004 22:27:45 GMT
Subject: error at "import anydbm"
References: <40042edd$0$24038$626a54ce@news.free.fr>
	<4004482A.A66C2886@engcorp.com>
Message-ID: <Bh_Mb.15554$RV5.9386@fe2.texas.rr.com>

"Peter Hansen" <peter at engcorp.com> wrote in message
news:4004482A.A66C2886 at engcorp.com...
>
> Generally speaking, you should try to avoid using the same names as
> the standard library modules for your own code.
>
>
This is an understandable limitation, but for new (and some not-so-new)
Python users, it is not always obvious what module names to avoid.

What if the standard library modules were put into a "std" package, to help
get them out of the global import namespace?  (Of course, this would break
*scads* of code, so maybe should be deferred to 3.0.  Or for migration
purposes, implement this in a 2.x release, and provide shadow xxx imports
that import the std.xxx modules.)

-- Paul




From try_vanevery_at_mycompanyname at yahoo.com  Thu Jan 15 16:16:26 2004
From: try_vanevery_at_mycompanyname at yahoo.com (Brandon J. Van Every)
Date: Thu, 15 Jan 2004 13:16:26 -0800
Subject: The GPL / BSD cultural divide (was ProtoCiv: porting Freeciv to
	Python CANNED)
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<n22Nb.11299$9k7.210522@news.xtra.co.nz>
	<bu2pgs$d123a$1@ID-207230.news.uni-berlin.de>
	<4004EC9E.1E2E2893@alcyone.com> <bu3iv2$n2u$4@tyfon.itea.ntnu.no>
	<bu4dii$daqjq$1@ID-207230.news.uni-berlin.de>
	<atic005o6mimsngaods5bf24opav75t29j@4ax.com>
Message-ID: <bu6v9l$ehk8a$1@ID-207230.news.uni-berlin.de>

Tom Plunket wrote:
> Brandon J. Van Every wrote:
>
>> Agreed, and more specifically, there is a huge *cultural divide*
>> between most OSS developers and proprietary commercial developers
>> who simply want to add some OSS "to get the boring bits over with."
>> There are also huge cultural divides between Linux and Windows
>> developers, and again between commercial game developers and
>> hobbyist game developers.
>
> So why waste their time even asking if they would consider
> aligning their goals with yours?  That seems like the ridiculous
> part- OF COURSE hobbyists are not going to want to take
> commercial concerns into account, THAT'S THE POINT.

Reminds me again of the joke about the 2 economists:

Two economists are walking down the street.  Near the gutter, a $20 bill
flutters.  One economist looks down, looks at the other, and exclaims, "Hey!
There's a $20 bill on the ground by the gutter!"  The second economist says,
"Nonsense, if there was someone would have picked it up already" and they
keep right on walking.

In other words, 6 months ago I had no reason to assume that hobbyist labor
would be completely useless to me.  I knew they wouldn't have the same
agendas as myself, but I thought they might have sufficient overlap to get
something of value to me accomplished.  I was mistaken.  Linux hobbyist game
developers of GPL flavor are of no use whatsoever to Windows commercial game
developers of BSD flavor, even if both are doing open source and might
benefit from common tools.  That may seem obvious to you, but it wasn't to
me, and I'd question why it should seem obvious to you at first glance.  I
looked at a *lot* of open source projects in the name of avoiding Not
Invented Here.  In hindsight, I should have gotten back to my own Ocean Mars
code a lot sooner.

-- 
Cheers,                     www.indiegamedesign.com
Brandon Van Every           Seattle, WA

When no one else sells courage, supply and demand take hold.



From michael at foord.net  Wed Jan 28 09:22:58 2004
From: michael at foord.net (Fuzzyman)
Date: 28 Jan 2004 06:22:58 -0800
Subject: Simple Database Package
Message-ID: <8089854e.0401280622.4e145267@posting.google.com>

I'm looking to build a simple database application for use on the
desktop (customer contact and feedback database).

Anyone able to reccomend a simple module / package I can use...  ?
I've never done any database work before and am ken to learn - but
most of the ones I've seen seem to rely on a database engine buit into
a server.. I need a simple stand alone engine. Of course I could just
build the functions I need - but that would be a bit of a waste and
not so extendable........

Thanks in advance for your help.

Fuzzy

fuzzy man AT atlantibots DOT org DOT uk

-- 

http://www.Voidspace.org.uk The Place where headspace meets
cyberspace. Online resource site - covering science, technology,
computing, cyberpunk, psychology, spirituality, fiction and more.

--- 

http://www.voidspace.org.uk/atlantibots/pythonutils.html
The home of Python dateutils - dateutils, ConfigObj, StandOut,
CGI-News etc


From merkosh at hadiko.de  Tue Jan 20 18:00:40 2004
From: merkosh at hadiko.de (Uwe Mayer)
Date: Wed, 21 Jan 2004 00:00:40 +0100
Subject: always the same object
Message-ID: <bukbuo$rqp$1@news.rz.uni-karlsruhe.de>

Hi,

I am using struct.unpack() quite often. unpack() returns a tuple, however a
tuple with always the same id(), which is AFAIK the memory location of the
structure.

I found myself working with above tuple, initialising other data structures,
etc... and when I tried to change one list element, suddenly all list
elements change => so they all contain the identical object

Now what are the rules when Python re-uses an old object (as with
struct.unpack() ) and when does it create new objects?
And what ist the proposed solution for dealing with this situation, i.e. how
to I create a true copy of what struct.unpack() returns me?

Thanks in advance
Ciao
Uwe


From gandalf at geochemsource.com  Tue Jan 20 04:00:58 2004
From: gandalf at geochemsource.com (Gandalf)
Date: Tue, 20 Jan 2004 10:00:58 +0100
Subject: Python-based file synchronizer (like Unison)?
References: <ua2ud1-evk.ln1@jowls.lairds.org>
Message-ID: <400CEE4A.2020406@geochemsource.com>

>
>
>I've been using Unison
>	http://www.cis.upenn.edu/~bcpierce/unison/
>for awhile and it causes me a lot of grief.  I'd love to have a
>Python version which would be vastly easier to modify.
>
>Anyone know of anything like this?  It doesn't seem like it
>should take a lot to sit on top of rsync and resolve conflicts.
>
>I see that someone implemented rsync in Python and that there's
>a SWIG wrapper for librsync.
>	http://minkirri.apana.org.au/~abo/projects/pysync/README
>I might have to take a whack at this on my own, but I'd prefer
>to use something better that someone has already crafted.
>
Well, I have something for you called PySynchro.  I wrote a simple 
client/server application
entriely in Python. Personally I use it for synchronize source codes 
between various computers.
It uses secure connections, authentication (OTP variant). It is plaform 
independent (I tried it
on FreeBSD, Linux and Windows. I don't know how it works on Macs.) It is 
not a hyperspeed
syncronizer (although it transfers the files in compressed chunks).  It 
requires some popular libraries
to be  present but the main point was independency. It does not require 
any external programs /
database servers etc. On the client side, there is a class representing 
the client interface
and I have a wxPython UI that uses this interface to synchronize files.

There are some problems, though. I would like to implement persistent 
file locking and auto-locking
but it is not written yet.. It would be also possible to store 
'versions' but it is done yet. From other
aspects, the UI interface is similar to Borland's TeamSource (with some 
major differences in the
background). If you only want to compare and merge directories, you 
 will find some useful classes
inside.

The code is fairly well documented (with epydoc) but the whole idea of 
the program is not.
Let me know if you are interested. I have been using it for months 
without problems but you can be
the first beta tester. :-)

   G





From tweedgeezer at hotmail.com  Tue Jan 27 22:57:15 2004
From: tweedgeezer at hotmail.com (Jeremy Fincher)
Date: 27 Jan 2004 19:57:15 -0800
Subject: [ANN] ip2cc-0.3: now it works with Python 2.3
References: <mailman.866.1075218376.12720.python-list@python.org>
	<84e0f331.0401271515.2ed5c4f0@posting.google.com>
Message-ID: <698f09f8.0401271957.66344665@posting.google.com>

rshaw2 at midsouth.rr.com (Richard) wrote in message news:<84e0f331.0401271515.2ed5c4f0 at posting.google.com>...
> I get an error when trying to use it... here's the problem below:
> 
> C:\Tools>ip2cc.py www.google.com
> Traceback (most recent call last):
>   File "C:\Tools\ip2cc.py", line 338, in ?
>     db = CountryByIP(db_file)
>   File "C:\Tools\ip2cc.py", line 14, in __init__
>     self.fp = open(filename, 'rb')
> IOError: [Errno 2] No such file or directory: 'C:\\Tools\\ip2cc.db'
> 
> Looks like the database file is not included with the download.
> 
> Richard

That's probably why it includes update.py, a tool for
updating/building the database.

Jeremy


From jjl at pobox.com  Fri Jan  9 09:16:45 2004
From: jjl at pobox.com (John J. Lee)
Date: 09 Jan 2004 14:16:45 +0000
Subject: Python and Jython are kinda different
References: <slrnbvsi8v.78r.ramen@lackingtalent.com>
Message-ID: <87wu81jjg2.fsf@pobox.com>

Dave Benjamin <ramen at lackingtalent.com> writes:
[...]
> Is there anyone here that works on Jython? Do you need help? What kind of

They certainly need help.


> help do you need? What's your estimation of the amount of work needed? Is

Asking on the Jython list seems like a good idea.


> the work done with PyPy helpful? I'm really curious.

PyPy is a research effort, so not immediately useful.  It may have big
payoffs if successful, of course.


John


From fmsumkin at users.sourceforge.net  Tue Jan 13 18:07:07 2004
From: fmsumkin at users.sourceforge.net (Fedor Sumkin)
Date: Wed, 14 Jan 2004 01:07:07 +0200
Subject: BlackAdder version 1.0-040112 Released
Message-ID: <mailman.1074041823.1981.clpa-moderators@python.org>

Rancho Santa Margarita, CA -- 13 January 2004 -- theKompany.com, producers 
and distributors of high-quality open source and commercial Linux software, 
are pleased to announce the availability of BlackAdder 1.0-040112, a 
Windows/Linux UI development environment for Python based on 
Qt.  BlackAdder combines a visual design environment with debugging, syntax 
highlighting, ODBC interfaces and extensive documentation into a 
comprehensive platform for developing Python applications with PyQt.

BlackAdder is an exciting product for rapidly developing applications on 
Linux or Windows using the popular Python language.  Besides being a 
powerful IDE with an extensive array of tools to make developing your 
application quick and easy.  BlackAdder is tightly integrated with PyQt 
which is a set of bindings for Python to allow you to make use of the 
popular Qt multi-platform windowing toolkit from Trolltech.  Our optional 
Business Edition gives you a full commercial license for both PyQt and Qt 
as used from BlackAdder.  This new release has significant enhancements to 
the Editor and Designer components of the system.

Take advantage of the popular and powerful Python language coupled with the 
Qt/PyQt windowing toolkit to create applications faster than you ever 
thought possible, and get multi-platform capability virtually for 
free.  Forget Visual Basic, BlackAdder is the future.

Features:

* Integrated Qt Designer

* Syntax highlighting text editor

* Supports the latest versions of Python, PyQt and Qt

* eGenix.com mx Extensions for ODBC access from Python have been included.

* Integrated Debugger

* The debugger allows class instance objects to be displayed.

* No restrictions are placed on the types of files that can be included in 
a project.

* Project Explorer for adding existing file sets to a project

* Extensive project management capability

* Integrated CVS support

* and much more?

BlackAdder can be purchased or free demos downloaded from 
www.thekompany.com/products/blackadder.
-- 




From mesteve_b at hotmail.com  Sat Jan  3 18:29:57 2004
From: mesteve_b at hotmail.com (python newbie)
Date: Sat, 03 Jan 2004 23:29:57 GMT
Subject: Lists are weird when they are instance members
References: <ffHJb.5475$HL3.4277@newssvr29.news.prodigy.com>
Message-ID: <VfIJb.5485$kp4.731@newssvr29.news.prodigy.com>

thanks for the helpful replies.
 I guess I was just in confusion as to why I was able to leave alone the
string variables in class FileGroup, such
as sourceDir and destinDir, and nothing unpredictable happened with those,
but with the list variable, I had to treat differently.
 But after I again read closely, Python In a Nutshell, I'm sure I will
understand.


"python newbie" <mesteve_b at hotmail.com> wrote in message
news:ffHJb.5475$HL3.4277 at newssvr29.news.prodigy.com...
> hey,
>  okay, I'm trying to figure out why my books: Quick Python, Python in a
> Nutshell, Python Cookbook and Learning Python don't say anything about the
> weird behavior of a list when you have one as an object instance member.
>
> for instance (my first pun of 2004), if I have,
>
> test.py
> ----------------
>
>  global_filegroup_array = []  # array of filegroup objects
>
>  class FileGroup:
>        a = 0
>        mylist = []      # here it is
>
>        def  put_stuff_in_my_list(self, anyfile):
>               self.mylist.append( get just a single string from file)   #
> pls excuse the psuedo
>
>        def __init__(self):
>             put_stuff_in_my_list(anyfile)
>
> def main():                         #     do ten times:  instantiate the
> above object, and add to the global array
>      for i in xrange(10):
>           filegroup = FileGroup()
>           global_filegroup_array.append(filegroup)
>
>
>    # print the list contents
>     print global_filegroup_array[0].mylist
>
> ------------ end of file
>
>   Output is:    [u'.string1', u'.string2', u'.string3' ]      # only
> u'string1' should show up
>
>    No matter which index I use into the global array, I always get ALL of
> the strings
>    showing up. I should only get  u'string1' showing up,   and u'string2'
> if
>    I used  "[1].mylist"
>
>
> How I resolved it, is by slipping in
>
>              self.mylist = []
>
>    before
>
>       put_stuff_in_my_list(anyfile)
>
>  in   __init__(self)
>
> Why should I have to empty out the list when it's a member of a newly
> instantiated object?
>
> thanks
>
> p.s.    ( I'm actually not doing exactly the thing with the
>              files,  but instead iterating through a xml file with dom,
>             debugging it showed the behavior )
>
>
>
>
>
>
>
>




From altis at semi-retired.com  Mon Jan 26 12:32:34 2004
From: altis at semi-retired.com (Kevin Altis)
Date: Mon, 26 Jan 2004 09:32:34 -0800
Subject: ANN: OSCON 2004 (Python 12) call for participation - proposal
	deadline February 9th!
Message-ID: <k8cRb.25$pd1.28239@news.uswest.net>

2004 O'Reilly Open Source Convention Call for Participation:
Opening the Future: Discover, Develop, Deliver
http://conferences.oreillynet.com/os2004/

The O'Reilly Open Source Convention (OSCON) will be held July 26-30, 2004 at
the Portland Marriott Downtown in Portland, OR.

Proposals Submission Information--Deadline: February 9, 2004
http://conferences.oreillynet.com/cs/os2004/create/e_sess



Sebastopol, CA--"There is an upheaval in the open source landscape,
particularly Linux, and the corporate landscape is changing too," observes
Tim O'Reilly, founder and CEO of O'Reilly & Associates. Economic pressures
and legal battles have combined to push open source topics to the front
burner as companies, institutions, and governments of every size make
technology decisions. O'Reilly, long a vocal open source advocate, brings
together open source influencers, early adopters, technology activists,
developers, and business leaders to evaluate and debate the evolving open
source landscape at OSCON, the annual O'Reilly Open Source Convention.

The 2004 O'Reilly Open Source Convention, to be held in Portland, OR from
July 26-30, is now accepting proposals delving into topics that matter most
to the entire open source community, which includes new--and perhaps
unexpected--players. "OSCON provides an analysis of what's happening now and
what may come--what will affect the future landscape. This convention brings
together projects in a way that other conferences don't. We're able to cover
a broad range of topics in a deep, coherent way," says OSCON program chair
Nathan Torkington. "It's not just about trimming costs at large companies,
it's about collaborating and innovating our way into the next big thing.
This convention is like a radar. It's a mix of what you'll be doing as soon
as you get back to your desk and what you'll be doing differently in six
months."

The keynote speakers for the next OSCON exemplify the event's wide-ranging
mix: Freeman, George, and Esther Dyson, presenting a joint keynote address;
Robert Lefkowitz, who was one of OSCON 2003's most thought-provoking
speakers; Milton Ngan of Weta Digital, the company that created the digital
effects for "The Lord of the Rings" films; and Tim O'Reilly. Other
influential open source leaders will come to OSCON to accept the first Open
Source Awards, produced by the Open Source Institute (OSI) and ZDNet
(winners will be announced in stages during the winter and spring of 2004).

Proposals Submission Information--Deadline: February 9, 2004
  http://conferences.oreillynet.com/cs/os2004/create/e_sess

Individuals and companies interested in making session or tutorial
presentations, or participating in panel discussions, are invited to submit
proposals. Presentations by marketing staff or with a marketing focus will
not be accepted; neither will submissions made by anyone other than the
proposed speaker. Session presentations are 45 or 90 minutes long, and
tutorials are either a half-day (three hours) or a full day (six hours).

The theme for OSCON 2004 is "Opening the Future: Discover, Develop,
Deliver." Proposals for sessions that help attendees discover new open
source projects, develop new relationships, or deliver value to their
employers and coworkers are especially welcome. Proposals that are not
related to the theme are also encouraged, such as case studies showing how
open source software solved thorny problems or replaced expensive closed
source software, best practices for a tool or system, new features or
modules, and fundamental skills.

The tracks and conferences running in parallel at the convention include:

Linux
- Management, security, administration, configuration
- Desktop, server farm, back office, personal productivity tools,
development

PHP Conference 4
- Unix, Windows, Apache, and beyond
- New developments, security, case studies, large-scale applications
development,
best practices

The Python 12 Conference
- Python and Zope
- Using the latest modules, software engineering, case studies

Perl Conference 8
- Perl 5, Perl 6, Parrot, mod_perl
- Useful modules, software development tips, developing for Parrot and Perl
6

MySQL and PostgreSQL
- Configuration, migration, data warehousing, tuning
- Clustering and replication, fallover, backups
- Efficient client-side processing and query design

Apache httpd, Java, and XML projects
- Apache web server: 2.0, modules, configuration, performance tuning,
security
- Apache XML projects: Xerces, Xalan, Cocoon, FOP, SOAP, XML-RPC, XML
Security
- Apache and Open Source Java projects: Jakarta, Jserv, Avalon, Geronimo

XML
- XML Schemas, Transformations, Software, Services, and Standards
- New standards, best practices, web services, IP issues around standards
and schemas

Applications
- System administration tools, servers, back office utilities
- GUI systems, user applications, productivity tools

Ruby
- Introductions to aspects of Ruby for people unfamiliar with the language
- Power user talks for experienced Ruby programmers

OSCON is the one place open source practitioners of every stripe can gather
to learn useful skills, discover what's new, and "cross-fertilize" projects.
Concludes Tim O'Reilly, "OSCON is for anyone interested in open source. It's
the one event that brings together leaders of all the major open source
projects not only with the hacker community but also with commercial
software developers, business leaders, analysts, and even opponents of open
source."




From joshway_without_spam at myway.com  Fri Jan  9 16:32:12 2004
From: joshway_without_spam at myway.com (JCM)
Date: Fri, 9 Jan 2004 21:32:12 +0000 (UTC)
Subject: Variable Scope 2 -- Thanks for 1.
References: <dcde6f.0401091247.c17b76e@posting.google.com>
	<3fff16b6$0$315$e4fe514c@news.xs4all.nl>
Message-ID: <btn6ks$ada$1@fred.mathworks.com>

Irmen de Jong <irmen at -nospam-removethis-xs4all.nl> wrote:
...
> A very important concept with Python is that you don't have variable 
> assignment, but name binding. An "assignment statement" binds a name on an 
> object, and the object can be of any type. A statement like this:

> age = 29

> doesn't assign the value 29 to the variable age. Rather, it labels the integer 
> object 29 with the name age.

I think this statement is misleading--it seems to imply the integer
object is altered somehow.  Personally I see no problem with saying
the value 29 is assigned to the variable age, so long as you
understand the semantics.


From irmen at -NOSPAM-REMOVETHIS-xs4all.nl  Thu Jan 15 08:09:50 2004
From: irmen at -NOSPAM-REMOVETHIS-xs4all.nl (Irmen de Jong)
Date: Thu, 15 Jan 2004 14:09:50 +0100
Subject: Python used in Freedom Force
In-Reply-To: <mailman.392.1074170206.12720.python-list@python.org>
References: <4BDF2B3C-464A-11D8-B48D-000A959CB2EC@netmail.to>
	<mailman.392.1074170206.12720.python-list@python.org>
Message-ID: <4006911e$0$327$e4fe514c@news.xs4all.nl>

Roberto Amorim wrote:

> Not only Freedom Force, but also Severance: Blade of Darkness (3rd-person
> action medieval game) and Bridge Commander (Star Trek TNG simulator).

And also Cyan's URU:Ages Beyond Myst.
I discovered some Python dlls and files in the game directory...

--Irmen


From No.Spam.mc at No.Spam.mclaveau.No.Spam.com  Fri Jan 16 20:27:52 2004
From: No.Spam.mc at No.Spam.mclaveau.No.Spam.com (Michel Claveau/Hamster)
Date: Sat, 17 Jan 2004 02:27:52 +0100
Subject: problems with os.path.isdir on windows shares (i've read the
	FAQ)
References: <4489035c.0401161545.75b63ce@posting.google.com>
Message-ID: <bua2ud$cm7$1@news-reader2.wanadoo.fr>

Hi !

\\\\ren\\backup   is perhaps no a directory, but the name of a shared
ressource.



@-salutations
--
Michel Claveau




From danb_83 at yahoo.com  Mon Jan 12 04:10:11 2004
From: danb_83 at yahoo.com (Dan Bishop)
Date: 12 Jan 2004 01:10:11 -0800
Subject: OT: Of C,
	Fortran and pointer aliasing Was: Python if far from a top
	performer...
References: <ryELb.238$tK2.228@amstwist00> <btn5db$2f8$1@absinth.dialog.net.pl>
	<pan.2004.01.09.21.35.40.132608@yahoo.com>
	<6ee58e07.0401092129.302cb9d4@posting.google.com>
	<pan.2004.01.11.06.08.18.867825@yahoo.com>
	<uj6Mb.20937$8H.54797@attbi_s03>
	<pan.2004.01.11.10.38.45.810669@yahoo.com>
Message-ID: <ad052e5c.0401120110.622b0fec@posting.google.com>

Samuel Walters <swalters_usenet at yahoo.com> wrote in message news:<pan.2004.01.11.10.38.45.810669 at yahoo.com>...
> |Thus Spake Rainer Deyke On the now historical date of Sun, 11 Jan 2004
> 06:46:50 +0000|
> 
> > Samuel Walters wrote:
> [Fortran is faster than C.]
> 
...
> I went digging for technical documents, but thus far haven't found many
> useful ones.  It seems everyone but me already understands pointer
> aliasing models, so they might discuss them, but they don't explain them.
> I am limited in part by my understanding of compilers and also by my
> understanding of Fortran.  Here is what I have gathered so far:
>
> Fortran passes all arguments by reference. (This is the peppiest way to do
> it, especially with static allocation)

Btw, for some early compilers, this was the case even with literals,
which meant that code like

    CALL FOO(4)
    PRINT *, 4

could print something other than 4.

> ...I'm a bit hazy as to whether
> Fortran 90 uses static or dynamic allocation, or a combination of both,

You can use both, at least for arrays.

> and whether it permits recursion.

Fortran 90 does permit recursion, although you have to explicitly
declare functions as "recursive".

> Now, for C:
...
> C lacks many of the fundamental array handling semantics and primitives
> that Fortran programs rely on.  Implementing them in C is a real PITA.

This is one of my least favorite things about C.

> C memory allocation is just plain goofy in comparison to Fortran.

And even worse in comparison to Python ;-)


From mtk at qm.com  Wed Jan 14 12:52:37 2004
From: mtk at qm.com (Totte Karlsson)
Date: Wed, 14 Jan 2004 09:52:37 -0800
Subject: Printing to console (No Scroll)
Message-ID: <bu3vk3$8k0$1@sea.gmane.org>

Hi,
How can I print to the console without having it scrolling to a new line for
each print statement?
I want to print a count down in the console, but for each count it scrolls
the screen (of course).

 Is there another way?

Here is the simple script for now

print "Closing window in :"
for second in range(10):
    time.sleep(1)
    print `10-second` +" seconds"

thanks
/totte






From jepler at unpythonic.net  Sat Jan 24 13:58:27 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Sat, 24 Jan 2004 12:58:27 -0600
Subject: Perl vs. Python for text manipulation
In-Reply-To: <buubrh$183r$1@nadya.doma>
References: <69A0D4AB81C51447AD6BA387782B8D64093D8A@midl-mail4.etcconnect.com>
	<871xpp1i8r.fsf@pobox.com> <ou4qulnwy0.fsf@andlx-anamika.cisco.com>
	<buu6j5$12lf$1@nadya.doma> <buu7pq$i67$1@panix1.panix.com>
	<buubrh$183r$1@nadya.doma>
Message-ID: <20040124185827.GE32445@unpythonic.net>

On Sat, Jan 24, 2004 at 09:00:17PM +0300, Serge Orlov wrote:
> If not, threads can
> have separate caching. After all, doing I/O on the same file from multipile
> threads is uncommon so it can suffer. 99+ percent of I/O in the world <wink>
> is done from one thread, why should it suffer?

The "unlocked I/O" mentioned earlier refers to locking inside the
standard C library, so Python can't avoid it except by calling
non-portable functions such as getc_unlocked* or by using lower-level
I/O primitives such as posix read(2)/write(2).

In these cases, Python would either have to hold the GIL during I/O
operations or add its own locking to them (or else decree that file
object access is not thread-safe).  There's no guarantee that this could
be faster than the thread safety already provided in the C library.

Jeff
* Actually, my getc_unlocked() manpage says that the function is in
  POSIX.1, so this may be as portable as read/write would be



From jseale18 at insightbb.com  Mon Jan 19 00:12:39 2004
From: jseale18 at insightbb.com (Jeff Seale)
Date: Mon, 19 Jan 2004 05:12:39 GMT
Subject: time module question
Message-ID: <Xns94752211F12jseale18insightbbcom@204.127.204.17>

How would one go about writing a program which included a clock that 
updated itself? Right now I'm able to display the time in a text widget in 
the window but I can't get it to update.


From piedmontbiz at aol.com  Thu Jan 22 00:01:03 2004
From: piedmontbiz at aol.com (PiedmontBiz)
Date: 22 Jan 2004 05:01:03 GMT
Subject: Secure Voting software
References: <87zncgy544.fsf@strauser.com>
Message-ID: <20040122000103.21852.00000518@mb-m06.aol.com>








>At 2004-01-22T01:35:01Z, Paul Rubin <http://phr.cx at NOSPAM.invalid> writes:
>
>> The book "Security Engineering" by Ross Anderson is a good place to start
>> reading if you're interested in the subject.
>
>I just finished "Practical Cryptography" by Niels Ferguson and Bruce
>Schneier.  It was almost enough to make me not want to bother trying.  :-/
>=2D --=20
>Kirk Strauser
>The Strauser Group
>Open. Solutions. Simple.
>http://www.strausergroup.com/


I checked out the site:     http://gnosis.python-hosting.com/voting-project/

This is a huge and important project. I suppose the programming language is
really not that important.  The issue is trustworthy system development
(applications, operating systems, drivers, libraries, hardware, etc.), and
developing ways to validate software.

A completely different programming paradigm will need to be developed.

allen


From pinard at iro.umontreal.ca  Fri Jan 16 09:37:39 2004
From: pinard at iro.umontreal.ca (=?iso-8859-1?Q?Fran=E7ois?= Pinard)
Date: Fri, 16 Jan 2004 09:37:39 -0500
Subject: ProtoCiv: porting Freeciv to Python CANNED
In-Reply-To: <PQMNb.11701$1e.731@newsread2.news.pas.earthlink.net>
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
	<pan.2004.01.14.01.17.00.970198@fakeemail.com>
	<bu2ana$bmpci$1@ID-207230.news.uni-berlin.de>
	<Xns94711BBF5F7D6JanC@213.119.4.35>
	<LiwNb.8126$f97.2162@fe3.columbus.rr.com>
	<PQMNb.11701$1e.731@newsread2.news.pas.earthlink.net>
Message-ID: <20040116143739.GA14990@alcyon.progiciels-bpi.ca>

[Andrew Dalke]
> My favorite program for this is /bin/true.  On some machines it is 0
> bytes long.

Yet, the AT&T empty file for True is heavily copyrighted.  Stretching
the meaning a bit (maybe more than a bit!), it amuses me to think that
nobody may produce an empty file anymore without being indebted to them.

-- 
Fran?ois Pinard   http://www.iro.umontreal.ca/~pinard



From ods at strana.ru  Thu Jan 29 06:18:47 2004
From: ods at strana.ru (Denis S. Otkidach)
Date: Thu, 29 Jan 2004 14:18:47 +0300 (MSK)
Subject: [ANN] ip2cc-0.3: now it works with Python 2.3
In-Reply-To: <bv6u6v$2ds8$1@nadya.doma>
Message-ID: <Pine.LNX.4.44L.0401291416350.22856-100000@ods.pravda.rfn.ru>

On Wed, 28 Jan 2004, Serge Orlov wrote:

SO> > IOError: [Errno 2] No such file or directory:
SO> 'C:\\Tools\\ip2cc.db'
SO> >
SO> > Looks like the database file is not included with the
SO> download.
SO>
SO> Try running update.py first to retrieve the database from
SO> internet.
SO> The exception should of course be caught by ip2cc script and
SO> a clear explanation should be printed.

Thank you for feedback.  I'm going to fix this in next release.

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




From eddie at holyrood.ed.ac.uk  Fri Jan 16 06:48:49 2004
From: eddie at holyrood.ed.ac.uk (Eddie Corns)
Date: Fri, 16 Jan 2004 11:48:49 +0000 (UTC)
Subject: best book: aint no such thing, and encouragement for old coots
References: <mailman.409.1074191840.12720.python-list@python.org>
Message-ID: <bu8j31$s4c$1@scotsman.ed.ac.uk>

"John Benson" <jsbenson at bensonsystems.com> writes:

>Hi, I see a lot of posts asking about "the best Python book." In my
>experience, there is no such thing, but there are a lot of good books that
>will help you along in different ways, and at different times.

>First of all, I'd like to clarify my position on learning: I subscribe to
>the adobe hacienda school of autodidactic technology, to wit:

>"If you throw enough adobe at the side of the hacienda, some of it will
>stick"

>At one time or another, I've dipped into the various O'Reilly Python books,
>Grayson's Python and Tkinter Programming, and Christopher's Python
>Programming Patterns. They're all good, but I need to see the same difficult
>or complex thing presented various times in various contexts to really get
>comfortable with it. Hence the multiple viewpoints of multiple books, and I
>will also read an individual book more than once, interspersed with other
>volumes. Enough adobe ends up adhering to my mental hacienda so that I can
>accomplish things in Python.

>And now, some encouragement for old techies who have considered going into
>management with writing cool software is enough:

>My formal education in data processing stopped with Advanced Data Structures
>back in the eighties, and I coasted along doing journeyman programming in
>various COBOLs, Cs and proprietary languages. Of course, I stayed reasonably
>current with stuff like Dijkstra's Structured Programming, DeMarco's
>Structured Analysis, Date's Relational Database and other flavors of
>business software technology which were my stock in trade, but otherwise I
>avoided the paradigm of the week. Then I ran into Python about two years ago
>and all of a sudden there was OOP, functional programming, aspect-oriented
>programming and other stuff that I had maybe heard about but hadn't actually
>worked with, all staring back at me from the pages of Python books and the
>mailing list. It's been pretty much a process of creative destruction:
>starting all over, but from a higher and clearer conceptual vantage point.
>And, of course, I didn't really forget all the other stuff, I just pushed it
>into the background long enough to get a new appreciation of it from this
>new point of view. In summary, I'd like to recommend getting into Python as
>a rather easy and fun way to talk the talk and walk the walk nowadays; it's
>been a very rewarding and refreshing software engineering update.


The next step is to read "Structure and Interpretation of Computer Programs"
aka SICP and start all over again, in terms of "clearer conceptual vantage
point" it just can't be beat.  It's even availabe online somewhere.

Eddie



From bloom at caltech.edu  Fri Jan  2 14:49:42 2004
From: bloom at caltech.edu (Jesse Bloom)
Date: Fri, 02 Jan 2004 19:49:42 +0000
Subject: problem using pickle / cPickle
Message-ID: <3FF5CB56.4000309@caltech.edu>

I keep running into a problem when I use pickle or cPickle to unpickle a 
python object I have serialized from the database.  I read the string 
for the serialized object.  Apparently I am missing an argument?  Here's 
what happens:

cPickle.loads(s)
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
TypeError: __new__() takes exactly 2 arguments (1 given)

Same thing happens when I use pickle:

 >>> pickle.loads(s)
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
   File "/usr/local/lib/python2.3/pickle.py", line 1394, in loads
     return Unpickler(file).load()
   File "/usr/local/lib/python2.3/pickle.py", line 872, in load
     dispatch[key](self)
   File "/usr/local/lib/python2.3/pickle.py", line 1097, in load_newobj
     obj = cls.__new__(cls, *args)
TypeError: __new__() takes exactly 2 arguments (1 given)



From raims at dot.com  Tue Jan 13 16:44:55 2004
From: raims at dot.com (Lawrence Oluyede)
Date: Tue, 13 Jan 2004 22:44:55 +0100
Subject: id3v2 module
References: <pan.2004.01.13.09.12.39.813880@beeznest.NOSPAM.net>
	<pan.2004.01.13.20.14.20.783863@freenet.de>
	<bu1mtf$nm$1@atlantis.news.tpi.pl>
Message-ID: <87u12z1q20.fsf@mobile.foo>

Jarek Zgoda <jzgoda at gazeta.usun.pl> writes:

> This one is able to read and write only ID3v1.1 tags.

Search for pyid3 not id3py

-- 
Lawrence "Rhymes" Oluyede
http://loluyede.blogspot.com


From http  Sat Jan 31 19:30:05 2004
From: http (Paul Rubin)
Date: 31 Jan 2004 16:30:05 -0800
Subject: OT: why do web BBS's and blogs get so slow?
References: <7xbrojk9rk.fsf_-_@ruckus.brouhaha.com>
	<iaXSb.5081$uM2.2552@newsread1.news.pas.earthlink.net>
Message-ID: <7xbrojej5e.fsf@ruckus.brouhaha.com>

Jay O'Connor <jayoconnor at earthlink.net> writes:
> This is similar to what I wrote in Smalltalk several years and is now
> running http://www.ezboard.com

Uh oh, ezboard.com is pretty slow.  Is it hopeless?


From jcarlson at nospam.uci.edu  Fri Jan 30 15:40:05 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Fri, 30 Jan 2004 12:40:05 -0800
Subject: mod_speling for python
In-Reply-To: <mailman.1035.1075466324.12720.python-list@python.org>
References: <9d1c4d6d.0401282106.d69b2c5@posting.google.com>	<bvd514$3bv$1@news.service.uci.edu>
	<mailman.1035.1075466324.12720.python-list@python.org>
Message-ID: <bvefja$919$2@news.service.uci.edu>

Skip Montanaro wrote:

>     >> I know there are drawbacks, disadvantages, this is "evil", etc.  I
>     >> only wanted to know what ways there are to add such a hook if it is
>     >> possible without altering the C source for python itself.
> 
>     Josiah> Ambiguities during execution are bad.  I've got two functions
>     Josiah> Foo and foO, if I type in foo, what did I mean?
> 
> I didn't interpret the OP's question as wanting to automatically map Foo to
> foO, but to give the user a more helpful error message, suggesting other
> candidate names which he might have mistyped.

That could be useful, if what you say is actually what he meant.

  - Josiah


From davecook at nowhere.net  Tue Jan 13 08:05:27 2004
From: davecook at nowhere.net (David M. Cook)
Date: Tue, 13 Jan 2004 13:05:27 GMT
Subject: Why learn Python ??
References: <40029dad$0$28706$a729d347@news.telepac.pt>
Message-ID: <slrnc07r8m.36l.davecook@localhost.localdomain>

In article <40029dad$0$28706$a729d347 at news.telepac.pt>, Bicho Verde wrote:

> I have now free time and money to do what I want :-)
>      I have some basic skills in programming (C, Pascal, Macromedia
> Actionscript) but don't know exactly what to do in the world of programming.
>     And also I don't know exactly why would I learn Python rather than C#,
> C++ or Perl. Basicaly I don't know where to start, if there is much to do or

You could casually pick up enough Python to be useful in a week or so of
evenings.  

Perl is not much harder, but has a lot of "gotchas".  I think Perl is more
natural as a system administration language, though, as that is what it was
designed for.

The others require much more up-front study before one can start writing
useful programs.  C#/Java are much easier than C++, but have huge, complex
APIs (my experience here is with Java, not C#) and require a lot of
boilerplate to get things done.

http://www.ferg.org/projects/python_java_side-by-side.html

> if it is has it seems and there is software to everything nowadays and so
> doesn't make sense to spend time in learning a programming language.

This is where the ease of writing "one off" Python programs comes in.  When
you do find yourself needing to write some custom code, you'll find it very
easy to cobble together something useful quickly.

Dave Cook


From bdesth.tagada at tsoin-tsoin.free.fr  Tue Jan 13 06:21:00 2004
From: bdesth.tagada at tsoin-tsoin.free.fr (Bruno Desthuilliers)
Date: Tue, 13 Jan 2004 12:21:00 +0100
Subject: Why learn Python ??
In-Reply-To: <pan.2004.01.12.20.18.36.606924@yahoo.com>
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<pan.2004.01.12.20.18.36.606924@yahoo.com>
Message-ID: <4003cfeb$0$19263$626a54ce@news.free.fr>

Samuel Walters wrote:
> |Thus Spake Bicho Verde On the now historical date of Mon, 12 Jan 2004
> 13:05:19 +0000|
> 
> 
>>I have now free time and money to do what I want :-)
> 
> Go to the Bahamas.  You'll enjoy it more.
> 
> [chop]
> 
> 
>>      Anyone would help me and give me some hints?
> 
> 
> Here's my two cents on which languages to learn, why and in what order.
> 
(snip)
> 
> Perl:
> I don't like perl, but you shouldn't judge a language on my opinion of it.
>  Perl is very popular and is worthy understanding the basics of.  Even if
> you don't like it, learn enough of it to read programs written in it. 

<troll>
Woops ! The problem with Perl is actually that it's more or less a 
write-only language !-)
</troll>

Bruno



From google at klaff.org  Fri Jan  2 16:05:14 2004
From: google at klaff.org (David Klaffenbach)
Date: 2 Jan 2004 13:05:14 -0800
Subject: Starting a script interactively?
Message-ID: <37d5fe8f.0401021305.349a440@posting.google.com>

Is there a way from within a python script to cause the interpreter to
be in interactive mode after the script finishes?

so that if I run:

myscript.py

it will always execute as if I had run:

python23.exe -i myscript.py

I know I could use a batch file or shell script but can it be done
from within the script itself?

Thanks, Dave


From swalters_usenet at yahoo.com  Mon Jan  5 12:55:33 2004
From: swalters_usenet at yahoo.com (Samuel Walters)
Date: Mon, 05 Jan 2004 17:55:33 GMT
Subject: Integer math question
References: <3987e01c.0401030832.114c6f2a@posting.google.com>
	<11EJb.20461$Vl6.3782481@news20.bellglobal.com>
	<kTEJb.724242$HS4.5376202@attbi_s01>
	<5sFJb.20923$Vl6.3818930@news20.bellglobal.com>
	<UuGJb.21252$Vl6.3847011@news20.bellglobal.com>
Message-ID: <pan.2004.01.05.17.54.22.894833@yahoo.com>

|Thus Spake Sean Ross On the now historical date of Sat, 03 Jan 2004
16:31:17 -0500|
> I think you're supposed to do something like this a = bq + r,      0<= r <
> |b|
It is, indeed, 0 <= r < abs(b)

"If a and b are integers such that b != 0, then there exist unique
integers r and q such that a = q*b + r and 0 <= r < abs(b)"

For non-mathematical spectators, the divmod() function is defined so that
q, r = divmod(a, b) by the definition above.

Sam Walters

-- 
Never forget the halloween documents.
http://www.opensource.org/halloween/
""" Where will Microsoft try to drag you today?
    Do you really want to go there?"""



From ptmcg at austin.rr.com  Sun Jan 18 19:15:14 2004
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Mon, 19 Jan 2004 00:15:14 GMT
Subject: re question - finiding matching ()
References: <4f0a9fdb.0401180751.4b66d974@posting.google.com>
	<20040118192118.61fea23f.no.spam@box>
Message-ID: <mkFOb.90616$WS1.44788@fe1.texas.rr.com>

"Christophe Delord" <no.spam> wrote in message
news:20040118192118.61fea23f.no.spam at box...
> On 18 Jan 2004 07:51:38 -0800, Miki Tebeka wrote:
>
<snip>
>
> Anyway a better solution would be to use a syntactic parser. You can
> write your own by hand or make your choice here:
> http://www.python.org/sigs/parser-sig/
>
> Best regards,
> Christophe.

Another parser not listed on this page can be found at
http://pyparsing.sourceforge.net. The download includes an algebraic
expression parser, that handles parenthesis nesting.

-- Paul




From __peter__ at web.de  Fri Jan 30 13:40:35 2004
From: __peter__ at web.de (Peter Otten)
Date: Fri, 30 Jan 2004 19:40:35 +0100
Subject: Safe to modify globals(), or not?
References: <6714766d.0401291559.45413e0d@posting.google.com>
	<bvcdt1$8t4$1@panix3.panix.com> <bvd6hm$9h1$03$1@news.t-online.com>
	<bve3te$fk9$1@panix2.panix.com>
Message-ID: <bve8f3$us$01$1@news.t-online.com>

Aahz wrote:

> In article <bvd6hm$9h1$03$1 at news.t-online.com>,
> Peter Otten  <__peter__ at web.de> wrote:
>>Aahz wrote:
>>>
>>> import __main__
>>> tmp = parse_funky_language("Hey, this is far out, man.")
>>> setattr(__main__, tmp.name, tmp.value)
>>> 
>>> In the context of the interactive interpreter, it's a bit harder to do;
>>> I don't remember off-hand what the namespace of the interpreter is.
>>
>>You don't need to :-)
>>
>>Python 2.3.3 (#1, Jan  3 2004, 13:57:08)
>>[GCC 3.2] on linux2
>>Type "help", "copyright", "credits" or "license" for more information.
>>>>> __name__
>>'__main__'
> 
> Yes, but how do you access that from a module?

<interp.py>
import sys
import __main__
setattr(sys.modules["__main__"], "name", "value")
__main__.anotherName = "another value"
</interp.py>

Python 2.3.3 (#1, Jan  3 2004, 13:57:08)
[GCC 3.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import interp
>>> name
'value'
>>> anotherName
'another value'
>>>

Or is this a misunderstanding continued?

Peter


From james at logicalprogression.net  Mon Jan 19 11:56:45 2004
From: james at logicalprogression.net (James Henderson)
Date: Mon, 19 Jan 2004 16:56:45 +0000
Subject: subclassing "file"
In-Reply-To: <bugvp5$rvd$1@news.rz.uni-karlsruhe.de>
References: <bugvp5$rvd$1@news.rz.uni-karlsruhe.de>
Message-ID: <200401191656.45641.james@logicalprogression.net>

On Monday 19 January 2004 4:14 pm, Uwe Mayer wrote:
> when extending a build in class, what does the constructor __init__(...)
> have to return?

A bit more detail now I've read your message properly. :)  It shouldn't have a 
return statement.  This means that it returns None.

Strictly speaking __init__ isn't a constructor, since the instance has already 
been created before being passed to it.  (A real constructor, __new__, has 
been added to the language for subclassing immutable types.)  __init__ just 
modifies self in place.

> and how does the constructor call its base-class construtor? (or is this
> done automatically?)

The __init__ method of the base class, assuming it must be called at all, must 
be called explicitly as an unbound method, as I showed in my last e-mail.  
Reminder: if "self.__init__()" is the bound method then 
"MyClass.__init__(self)" is the unbound method.  The two are generally 
equivalent, but the unbound form is needed in inheritance to specify a 
superclass of self's immediate class.

J.
-- 
James Henderson, Logical Progression Ltd.
http://www.logicalprogression.net/
http://sourceforge.net/projects/mailmanager/




From akhavr at kds.com.ua  Sun Jan 11 09:34:05 2004
From: akhavr at kds.com.ua (Andrey Khavryuchenko)
Date: Sun, 11 Jan 2004 16:34:05 +0200
Subject: script to translate from compiler AST
Message-ID: <m3d69qk10i.fsf@netmaster.kds.com.ua>

Hi!

I'm looking for a script to translate from 'compiler' AST to py source
and executable code.

Google search reveals hardly useful links.

Is there something like that or it is left as an exercise for a curious
developer?

-- 
Andrey V Khavryuchenko            http://www.kds.com.ua/
Silver Bullet Software Solutions  http://www.kds.com.ua/training/


From max at alcyone.com  Sat Jan 17 19:13:37 2004
From: max at alcyone.com (Erik Max Francis)
Date: Sat, 17 Jan 2004 16:13:37 -0800
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
	<m3hdyvswui.fsf@tanelorn.bandersnatch.org>
	<1074370049.790131@radsrv1.tranzpeer.net>
Message-ID: <4009CFB1.FF64F9C9@alcyone.com>

Corey Murtagh wrote:

> Actually I kind of agree here.  I've had plenty of problems with
> Cygwin
> - although less with MinGW.  An OSS project that requires a Linux
> emulation shim to run on any other platform is not, IMHO,
> cross-platform
> at all.

Problem here is, Freeciv _does_ have a native win32 binary available. 
So the entire premise that Brandon was starting with was totally false.

-- 
 __ Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
/  \ San Jose, CA, USA && 37 20 N 121 53 W && &tSftDotIotE
\__/ In this world, nothing is certain but death and taxes.
    -- Benjamin Franklin


From sross at connectmail.carleton.ca  Sat Jan 31 15:41:17 2004
From: sross at connectmail.carleton.ca (Sean Ross)
Date: Sat, 31 Jan 2004 15:41:17 -0500
Subject: Python vs. Io
References: <711c7390.0401291301.3f95794@posting.google.com>
	<qnkfzdyieg0.fsf@arbutus.physics.mcmaster.ca>
	<711c7390.0401301710.4353274@posting.google.com>
	<bvf6kc$2v$2@news.service.uci.edu>
	<711c7390.0401311220.763be80a@posting.google.com>
Message-ID: <8sUSb.46657$mf4.1789355@news20.bellglobal.com>

"Daniel Ehrenberg" <LittleDanEhren at yahoo.com> wrote in message
news:711c7390.0401311220.763be80a at posting.google.com...
[snip]
>> there isn't any magical syntax that is
> > usable on one Python x.y installation, that isn't on another.
> >
> >   - Josiah
>
> What are you talking about?
[snip]

Syntax that can be used on one Python x.y.z installation, can
be used on another installation of the _same_ version (x.y.z)
of Python.






From mmontagne at walkermacy.com  Thu Jan 15 20:20:52 2004
From: mmontagne at walkermacy.com (michael montagne)
Date: Thu, 15 Jan 2004 17:20:52 -0800
Subject: best book
In-Reply-To: <mailman.372.1074117050.12720.python-list@python.org>
References: <mailman.372.1074117050.12720.python-list@python.org>
Message-ID: <100ef3le0dl12a8@corp.supernews.com>

km wrote:
> Hi all,
> 
> What is the best book to start with python ? i am have been working since 1 yr with Perl. 
> 
>  kindly enlighten,
> 
> thanks,
>  KM
> 
> 
> 

The Quick Python Book .  Daryl Harms.  Fantastic.



From gerrit at nl.linux.org  Thu Jan  8 15:32:56 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Thu, 8 Jan 2004 21:32:56 +0100
Subject: PRE-PEP: new Path class
In-Reply-To: <vvivefh35qjv9a@news.supernews.com>
References: <vvivefh35qjv9a@news.supernews.com>
Message-ID: <20040108203256.GA5903@nl.linux.org>

John Roth wrote:
> I'm adding a thread for comments on Gerrit Holl's pre-pep, which
> can be found here:
> 
> http://tinyurl.com/2578q

I have updated a lot of things on the PEP in the past few days.
There are still larger and smaller open issues, though, besides the
usual 'I-can-change-my-mind-and-the-PEP-can-change-its-mind' things:

Quoting my own PEP:

Should path.__eq__ match path.samefile?

There are at least 2 possible ways to do it:

    - Normalize both operands by checking to which actual file they
      point (same (l)stat).
    - Try to find out whether the paths point to the same filesystem
      entry, without doing anything with the filesystem.

pro
    - A path usually points to a certain place on the filesystem, and
      two paths with different string representations may point to the same place,
      which means they are essentially equal in usage.
con
    - We would have to choose a way, so we should first decide which is
      better and whether the difference is intuitive enough.
    - It makes hashing more difficult/impossible.
conclusion
    - I don't know.
links
    - Bernard Herzog `points out
      <http://mail.python.org/pipermail/python-list/2004-January/201857.html>`__
      that it would essentialy make path-objects non-hashable.
    - `James Orendorff's Path`_ inherits str.__eq__.
    - `Mike C. Fletcher's Path`_ chooses for the first variant.

Do we need to treat unicode filenames specially?

I have no idea.

links
    - An `explanation
      <http://mail.python.org/pipermail/python-list/2004-January/201418.html>`__
      by Martin von Loewis.

- should os.tempnam be included?
- can normpath be coded using only os.path constants (if so, it's in the
  'platform-independent' class? (I think no)
- Should normalize be called normalized or not?
- Should stat be defined in the platform-dependent or -independent class?
- Should we include chdir and chroot? If so, where?
- Should rename return a new path object?
- Should renames be included?

And one meta-question:

Shall I submit this as an official PEP? Or shall I first fill in more
open issues and perhaps give the possibility to change "closed" issues?

See also: http://people.nl.linux.org/~gerrit/creaties/path/pep-xxxx.html

yours,
Gerrit.

-- 
202. If any one strike the body of a man higher in rank than he, he
shall receive sixty blows with an ox-whip in public.
          -- 1780 BC, Hammurabi, Code of Law
-- 
PrePEP: Builtin path type
    http://people.nl.linux.org/~gerrit/creaties/path/pep-xxxx.html
Asperger's Syndrome - a personal approach:
	http://people.nl.linux.org/~gerrit/english/



From aahz at pythoncraft.com  Sun Jan  4 14:31:21 2004
From: aahz at pythoncraft.com (Aahz)
Date: 4 Jan 2004 14:31:21 -0500
Subject: Proposal: new peps always in clpa
References: <mailman.80.1073238516.12720.python-list@python.org>
Message-ID: <bt9pm9$rhf$1@panix2.panix.com>

In article <mailman.80.1073238516.12720.python-list at python.org>,
Gerrit Holl  <gerrit at nl.linux.org> wrote:
>
>would it be a good idea to automatically sumbit all new peps to
>comp.lang.python.announce? After all, each PEP is an announcement and
>may be important to the entire Python community. Another possibility
>would be to python-dev, but since c.l.py.announce has a broader public,
>I'd prefer the first one. What do you think?

That's a good idea, but c.l.py.announce needs to have its Followup-To:
set to c.l.py.  I think I asked for that once before, but didn't get a
response.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

A: No.
Q: Is top-posting okay?


From ptmcg at austin.rr.com  Sat Jan  3 13:59:03 2004
From: ptmcg at austin.rr.com (Paul McGuire)
Date: Sat, 03 Jan 2004 18:59:03 GMT
Subject: KeyboardInterrupt and threading
References: <a6562e06.0401021352.65aac82b@posting.google.com>
Message-ID: <XhEJb.40848$DC4.32293@fe2.texas.rr.com>

"Ivan Nestlerode" <q2n8byu02 at sneakemail.com> wrote in message
news:a6562e06.0401021352.65aac82b at posting.google.com...
> Hello comp.lang.python,
>
> I am attempting to write a threaded program right now in Python
> (version 2.3 on Debian unstable) and the current behavior of
> KeyboardInterrupt is causing me grief. From the documentation of the
> thread module in Python 2.3.3:
>
> "Threads interact strangely with interrupts: the KeyboardInterrupt
> exception will be received by an arbitrary thread. (When the signal
> module is available, interrupts always go to the main thread.)"
>
Is the signal module not available to you?
<snip>
> Any ideas (besides rewriting the sloppy library code) would be much
> appreciated.
>
> Thanks,
> -Ivan

Assuming you have access to the signal module:
1. Create a boolean that you can periodically test for in your thread code,
to see if you should keep processing.  This may be a global singleton, a
global boolean, or something, but it needs to be visible to both the main
thread and the threaded code.  You probably have some compute intensive
loops such as:
    while( prime_factors < 1e15 ):
or
    while( optimization != converged ):
or even just
    while( True ):

Change these to reference the "keep processing" flag.
    while( keep_processing and prime_factors < 1e15 ):
or
    while( keep_processing and optimization != converged ):
or even just
    while( keep_processing ):  # no need to 'and' with True

2. Create a signal handler to trap for SIGINT. In the signal handler, set
the "keep-processing" bit to False:

import signal

def discontinue_processing(signl, frme):
    global keep_processing
    keep_processing = False
    return 0

signal.signal( signal.SIGINT, discontinue_processing )


Now your main thread will get the ^C interrupt and clear the
"keep_processing" flag, which will eventually get picked up by your worker
thread the next time it tests for it.

HTH,
-- Paul




From andymac at bullseye.apana.org.au  Wed Jan  7 05:43:25 2004
From: andymac at bullseye.apana.org.au (Andrew MacIntyre)
Date: Wed, 7 Jan 2004 21:43:25 +1100 (EST)
Subject: debugging memory management via C API
In-Reply-To: <3FFBBD02.3010501@sympatico.ca>
References: <3FFBBD02.3010501@sympatico.ca>
Message-ID: <20040107214153.J38682@bullseye.apana.org.au>

On Wed, 7 Jan 2004, Stefan Seefeld wrote:

> I'm writing some C python extension and I'd like
> to debug the memory management, i.e. run some
> tests to see whether I did the ref counting
> correctly, etc.

A debug build of Python will help considerably.

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



From mark at mceahern.com  Sun Jan 18 12:05:20 2004
From: mark at mceahern.com (Mark McEahern)
Date: Sun, 18 Jan 2004 11:05:20 -0600
Subject: re question - finiding matching ()
In-Reply-To: <4f0a9fdb.0401180751.4b66d974@posting.google.com>
References: <4f0a9fdb.0401180751.4b66d974@posting.google.com>
Message-ID: <1074445520.18656.30.camel@dev.internal>

On Sun, 2004-01-18 at 09:51, Miki Tebeka wrote:
> Hello All,
> 
> To all of you regexp gurus out there...
> 
> I'd like to find all of the sub strings in the form "add(.*)"
> The catch is that I might have () in the string (e.g. "add((2 * 2), 100)"), 

The pattern you have is so simple and the necessary regex (it seems to
me) so unnecessarily complex (for a 100% regex solution) that I think
using only regex's for this problem is overkill.  Anyway, here's a
test-based approach:

#!/usr/bin/env python

import re
import unittest

def findOperands(verb, text):
    """Find operands in text for verb.

    E.g., findOperands('add', 'add(1, 2, 3)') == ['1', '2', '3']

    """
    raw = '%s\((.*)\)' % (verb,)
    pat = re.compile(raw)
    matches = pat.findall(text)
    if not matches:
        raise RuntimeError('No matches found for pattern %s.' % (raw,))
    assert len(matches) == 1
    match = matches[0]
    operands = match.split(',')
    for i, item in enumerate(operands):
        operands[i] = item.strip()
    return operands
    
class test(unittest.TestCase):

    def test(self):
        text = 'add(2, 3)'
        operands = findOperands('add', text)
        expected = ['2', '3']
        self.assertEquals(operands, expected)

        text = 'add((2 * 2), 100)'
        operands = findOperands('add', text)
        expected = ['(2 * 2)', '100']
        self.assertEquals(operands, expected)

        text = 'add(1, 2, 3)'
        operands = findOperands('add', text)
        expected = ['1', '2', '3']
        self.assertEquals(operands, expected)

        text = 'multiply(1, 2, 3, 4)'
        operands = findOperands('multiply', text)
        expected = ['1', '2', '3', '4']
        self.assertEquals(operands, expected)

        text = 'add 2, 3'
        self.assertRaises(RuntimeError, findOperands, 'add', text)
        
unittest.main()





From vzd1s1fs at verizon.net  Sat Jan 10 21:39:21 2004
From: vzd1s1fs at verizon.net (Zachary)
Date: Sun, 11 Jan 2004 02:39:21 GMT
Subject: help with Python Environment For Blind User
Message-ID: <tH2Mb.6292$EL4.3998@nwrddc02.gnilink.net>

Hello,
I'm a blind non-programmer trying to learn Python.
I've got python 2.3 for windows, but the problem is that Idle doesn't seem
to work two well with my screen reading program.
Is notepad, then, my only other real choice?  Pythonwin worked similarly
badly.
The problem is my programs inability to track the cursor.  It doesn't tell
me what line I'm on, where I am in that line, or what I just deleted.  It
would do this in a normal editor.
Any help with this would be appreciated.
Zack




From matt at pollenation.net  Mon Jan 12 06:01:51 2004
From: matt at pollenation.net (Matt Goodall)
Date: Mon, 12 Jan 2004 11:01:51 +0000
Subject: CGI module problem: duplicated output
In-Reply-To: <bttt36$hn6$1@sea.gmane.org>
References: <mailman.219.1073658628.12720.python-list@python.org>	<9smuvv0ou8qpilg9vlpgpqt45apalmur49@4ax.com>	<mailman.288.1073895526.12720.python-list@python.org>	<jvtMb.409$L97.222@news.get2net.dk>
	<bttt36$hn6$1@sea.gmane.org>
Message-ID: <40027E9F.2010209@pollenation.net>

Mimal wrote:

>> How about renaming it to mimal_cgi.py!
>
>
> For a second I thought: "That's it!" Unfortunately, that doesn't seem 
> to  help. I renamed the file and I got the same. :-(
>
Check there is no cgi.pyc from when the script was still called cgi.py.

Cheers, Matt

-- 
Matt Goodall, Pollenation Internet Ltd
w: http://www.pollenationinternet.com
e: matt at pollenation.net





From harry.g.george at boeing.com  Fri Jan  9 03:09:19 2004
From: harry.g.george at boeing.com (Harry George)
Date: Fri, 9 Jan 2004 08:09:19 GMT
Subject: pyxml-0.8.3 install problem on RedHat 9
References: <dea2ed57.0401081729.37efa36d@posting.google.com>
Message-ID: <xqx3caph7bk.fsf@cola2.ca.boeing.com>

jangseungwook at nate.com (jang, seungwook) writes:

> >> python setup.py build
> 
> running build
> running build.py
> no copying xml/FtCore.py (output up-to-date)
> blah blah ..
> 
> running build_scripts
> not copying scripts/xmlproc-parse (up-to-date)
> not copying scripts/xmlproc_val (up-to-date)
> 
> 
> How can I fix it ?
> Please help me ~~ 
> 

Fix what?  The "not copying" is the normal response if the files are
current.  This might happen if you had an older PyXML installation and
were doing an update -- files that were the same would not need to be
installed again.

When you try importing one of the modules, does it work?

> 
> 
> Seungwook, Jang

-- 
harry.g.george at boeing.com
6-6M31 Knowledge Management
Phone: (425) 342-5601


From jdhunter at ace.bsd.uchicago.edu  Thu Jan 22 15:28:23 2004
From: jdhunter at ace.bsd.uchicago.edu (John Hunter)
Date: Thu, 22 Jan 2004 14:28:23 -0600
Subject: Ordered dictionary?
In-Reply-To: <leWPb.231$af7.162835@newshog.newsread.com> (Leif K-Brooks's
	message of "Thu, 22 Jan 2004 20:18:25 GMT")
References: <leWPb.231$af7.162835@newshog.newsread.com>
Message-ID: <m2oesv6848.fsf@mother.paradise.lost>

>>>>> "Leif" == Leif K-Brooks <eurleif at ecritters.biz> writes:

    Leif> I need to associate a string (key) with an integer
    Leif> (value). A dictionary would do the job, except for the fact
    Leif> that it must be ordered. I also need to look up the value
    Leif> for a specific key easily, so a list of tuples wouldn't
    Leif> work.

google : python ordered dictionary
click  : I'm feeling lucky

JDH



From jcarlson at nospam.uci.edu  Mon Jan 26 10:18:55 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Mon, 26 Jan 2004 07:18:55 -0800
Subject: Guardian: open source is a throwback says Jack Schofield
In-Reply-To: <slrnc1ab4j.3kh.davecook@localhost.localdomain>
References: <64cff82f.0401251143.328388bd@posting.google.com>
	<mailman.772.1075066543.12720.python-list@python.org>
	<bv1jkf$g46$1@namru.matavnet.hu>
	<bv1pgj$ctl$3@news.service.uci.edu>
	<slrnc1ab4j.3kh.davecook@localhost.localdomain>
Message-ID: <bv3b8v$a0j$2@news.service.uci.edu>

David M. Cook wrote:

> In article <bv1pgj$ctl$3 at news.service.uci.edu>, Josiah Carlson wrote:
> 
> 
>>Speaking of which...
>>http://www.whitehouse.gov/news/releases/2004/01/20040122-5.html
> 
> 
> I'm still flabbergasted that this is on whitehouse.gov and not on
> whitehouse.org.
> 
> Dave Cook
> 

I think even the White House staff is coming to realize they are working 
for a schmuck.

  - Josiah


From mnations at airmail.net  Fri Jan  9 20:17:02 2004
From: mnations at airmail.net (Marc)
Date: 9 Jan 2004 17:17:02 -0800
Subject: Databases: Which one's right for me?
Message-ID: <4378fa6f.0401091717.1ae63541@posting.google.com>

Hi all,

Having never used a database before and immersing myself in reading
stuff about databases over the last two days I have come to this
conclusion, I still don't know which one I need. I've been using
Python for a while, storing things that I'll need later in files. I am
now looking for a better solution; ergo the need for a database.

Basically I need a db that will travel with my executable script and
faithfully store and edit the data needed in that script. People using
this script will need to be stand alone users. Having a client/server
arrangement is not possible over a network.

Also, installing some type of db engine outside of Python is also not
possible. This rules out installing such readily available databases
as mySQL or any other type of db that must have a separate install.
Everything must be contained within the Python executable package.
However, all of the users WILL have MS Access already installed. So
that is a good possibility, and I have already played around with DAO
and run a couple of scripts with it.

However, I've also read some things about the Python independent db
called Gadfly. This is also an interesting possibility as it reduces
the need to even have Access around and lowers the complexity in
freezing applications (which can run into problems when using COM
clients sometimes).

So from reading I've narrowed it down to two possibilities - MS Access
with DAO and Gadfly. What I can't get from reading is experience or
someone who has done this type of thing before and already knows which
one will work best based on what I need to do. Or, if there exists
another solution other than the two I mentioned, please throw that out
there because it's almost impossible to completely examine every
possibility out there. All suggestions are helpful.

Thanks ahead of time,
Marc


From theaney at cablespeed.com  Thu Jan 22 23:39:07 2004
From: theaney at cablespeed.com (Tim Heaney)
Date: Thu, 22 Jan 2004 23:39:07 -0500
Subject: get "yesterday's" date in iso format
References: <pan.2004.01.23.04.13.55.406832@quanta1.world-vr_stupidspambot.com>
Message-ID: <877jzjb7o4.fsf@mrbun.watterson>

necromancer_stupidspambot at quanta1.world-vr_stupidspambot.com writes:
>
> I am trying to find a simple way to get "yesterday's" date.  I know I can
> build various check to seee if we are in leap year, if we are the 1st then
> yesterday is the 31(or 30 depending of the month) etc. but there is got to
> be a simpler way than that.

Since time.time() gives the time in seconds since the epoch, you could
just subtract a day from that to get yesterday.

  >>> import time
  >>> time.gmtime(time.time()-24*60*60)
  (2004, 1, 22, 4, 36, 3, 3, 22, 0)

I hope this helps,

Tim


From __peter__ at web.de  Thu Jan  8 08:05:17 2004
From: __peter__ at web.de (Peter Otten)
Date: Thu, 08 Jan 2004 14:05:17 +0100
Subject: Descriptor puzzlement
References: <vvqjj92il4o1d0@news.supernews.com>
Message-ID: <btjkaq$rhr$02$1@news.t-online.com>

John Roth wrote:

> Using Python 2.2.3, I create this script:
> 
> [beginning of script]
> 
> class AnObject(object):
>     "This might be a descriptor, but so far it doesn't seem like it"
>     def __init__(self, somedata):
>         self.it = somedata
>     def __get__(self, obj, type=None):
>         print "in get method"
>         return self.it
>     def __set__(self, obj, it):
>         print "in set method"
>         self.somedata = it
>         return None
> ##    def foo(self):
> ##        return 1
> 
> class AnotherObject(object):
>     def __init__(self):
>         self.prop = AnObject("snafu")
> 
> myClass = AnotherObject()
> print myClass.prop
> myClass.prop = "foobar"
> print myClass.prop
> 
> [end of script]
> 
> Then I execute it:
> 
> C:\Documents and Settings\John\My Documents\Projects\AstroPy4>b
> 
> C:\Documents and Settings\John\My Documents\Projects\AstroPy4>python b.py
> <__main__.AnObject object at 0x0086D248>
> foobar
> 
> It doesn't look like the descriptor protocol is getting
> invoked at all.
> 
> What's happening here?

The descriptor protocol works on the class, not the instance, so 

class AnotherObject(object):
    prop = AnObject("snafu")

or something similar should work. This means in particular that you have to
store the property's state in the AnotherObject rather than the AnObject
instance.

Peter



From bart_nessux at hotmail.com  Thu Jan  8 18:17:17 2004
From: bart_nessux at hotmail.com (Bart Nessux)
Date: Thu, 08 Jan 2004 18:17:17 -0500
Subject: count objects in a list and random numb gen
Message-ID: <btkodt$hrg$1@solaris.cc.vt.edu>

New to Python... trying to figure out how to count the objects in a list 
and then map the count to the objects or convert the list to a dict... I 
think the latter would be better as I need a number associated with each 
entry. Any pointers?

Also, does this bit of code look to be truely random?

def random_number_gen():
    winner = []	
    winner.append(random.sample(xrange(100000), 1))	
    print winner	

TIA, Bart





From jacek.generowicz at cern.ch  Wed Jan  7 03:46:19 2004
From: jacek.generowicz at cern.ch (Jacek Generowicz)
Date: 07 Jan 2004 09:46:19 +0100
Subject: metadocumentation (keyword help)
References: <tyfn091gnk5.fsf@pcepsft001.cern.ch>
	<mailman.144.1073405082.12720.python-list@python.org>
	<3ffb0edf$1@nntp0.pdx.net>
Message-ID: <tyfhdz8gn8k.fsf@pcepsft001.cern.ch>

sdd <daniels at dsl-only.net> writes:

> Jp Calderone wrote:
> 
> > On Tue, Jan 06, 2004 at 03:27:06PM +0100, Jacek Generowicz wrote:
> >
> 
> >>Where can I find concise, clear documentation[*] describing what one has
> >>to do in order to enable Python's internal help to be able to provide
> >>descriptions of Python keywords ?
> >   "Quote them"
> 
> >   help('if')
> 
> >   Jp
> 
> Or simply use help()
> and interactively enter lines.


Yes, but this actually does not work out of the box (on any of the
GNU/Linux, Mac OS X, and even Windoze installaitions I have tried). You
get an error message complaining about the absence of HTML
documentation and setting PYTHONDOCS. So, to rephrase my question ...


Where can I find clear instructions on how to install and configure
the Python documentation which is necessary to make the following
work:

   >>> help('and')

?


From theller at python.net  Fri Jan  9 07:37:09 2004
From: theller at python.net (Thomas Heller)
Date: Fri, 09 Jan 2004 13:37:09 +0100
Subject: unable to register PythonService.exe
References: <c168f829.0401081436.48e2f920@posting.google.com>
Message-ID: <y8shti16.fsf@python.net>

prof_888 at hotmail.com (ChrisD) writes:

> I'm running Python 2.3.3 with Win32 extensions win32all-163.  I'm
> working through Chapter 18 of Mark Hammond's excellent "Python
> Programming on Win32".  On page 350 the simple NT service example
> requires that the PythonService.exe program be registered.  However,
> when I attempt it I get this error:
>
> ---------------------------------
> C:\Python23\Lib\site-packages\win32>PythonService /register
> Registering the Python Service Manager...
> Fatal Python error: PyThreadState_Get: no current thread
>
> abnormal program termination
> ---------------------------------
>
> Any thoughts on how I can fix this problem?

Looks like a bug to me, it behaves the same for me.

OTOH, it seems that it's not required to do this registration since the
sample PythonTestService.py works fine for me.

Thomas


From netquest at sympatico.ca  Mon Jan 26 18:00:39 2004
From: netquest at sympatico.ca (KNS)
Date: Mon, 26 Jan 2004 15:00:39 -0800
Subject: winapi: mouseclick
Message-ID: <xheRb.3760$mf4.463197@news20.bellglobal.com>


Hello,

Can someone please suggest how to test for a mouse click using
the WinAPI?  I have dispatched a windows application and would
like to detect any mouseclicks (and keyboard entry for that matter)...

Thanks.



From max at cNvOiSsiPoAnMtech.com  Fri Jan 16 12:06:37 2004
From: max at cNvOiSsiPoAnMtech.com (Maxim Khesin)
Date: Fri, 16 Jan 2004 17:06:37 GMT
Subject: SimpleXMLRPCServer
In-Reply-To: <BNUNb.1731$dC4.1227@newssvr29.news.prodigy.com>
References: <YKNNb.213874$0P1.42736@twister.nyc.rr.com>
	<mailman.432.1074263943.12720.python-list@python.org>
	<BNUNb.1731$dC4.1227@newssvr29.news.prodigy.com>
Message-ID: <xSUNb.125437$4F2.13926728@twister.nyc.rr.com>

Bernhard Mulder wrote:

> Here is an example of a server which runs as long as self.running
> is set:
> 
> class SimpleXMLRPCServer_with_stop(SimpleXMLRPCServer.SimpleXMLRPCServer):
> 
>    def __init__(self, *args, **kwds):
>        self.running = True
>        SimpleXMLRPCServer.SimpleXMLRPCServer.__init__(self, *args, **kwds)
> 
>    def serve_while_running_is_set(self):
>       """Server while running is set."""
>       while self.running:
>          self.handle_request()


So putting it in my original terms this would be:

server = SimpleXMLRPCServer(('', 8000))
server.register_instance(MyClass())
while(1)
  if(checkSomeCondidion()):
   server.handle_request()
  else: server.stop()

?
thanks.


From francisgavila at yahoo.com  Mon Jan 12 17:13:51 2004
From: francisgavila at yahoo.com (Francis Avila)
Date: Mon, 12 Jan 2004 17:13:51 -0500
Subject: How to call a system command with flexibility on Windows
References: <4aEMb.1798$PK6.17978@nnrp1.uunet.ca>
	<40031266.B76A5B6F@engcorp.com>
Message-ID: <1006734gmrededc@corp.supernews.com>

Peter Hansen wrote in message <40031266.B76A5B6F at engcorp.com>...
>It can be done on Windows, although at the very least you cannot redirect
>stderr properly from the command line on Win98....  not sure about other
>issues.

Win98 is particularly bad:
>>> os.system('dir')
#output snipped
0 #return code
>>> os.system('foo')
Bad command or file name
0
>>> 

>I'm pretty sure return codes are available with os.system() under Windows,
>but I rarely use them and forget any relevant details.
-- 
Francis Avila


From jjl at pobox.com  Wed Jan 14 20:07:44 2004
From: jjl at pobox.com (John J. Lee)
Date: 15 Jan 2004 01:07:44 +0000
Subject: Python and XForms: existing implementations?
References: <mailman.350.1074089447.12720.python-list@python.org>
Message-ID: <87n08qrpcv.fsf@pobox.com>

"Christian Wilcox" <cwilcox at etcconnect.com> writes:

> Does anyone know of any existing Python implementations of an XForms
> viewer?

What environment does it have to work in?

Does it have to be cross-platform?  Does it have to be in pure Python,
or just useable from Python?  Does it have to integrate with a
particular GUI framework, or with MS OLE?  Does it have to be open
source?  etc.

(BTW, you might want to disambiguate this: XForms is both an XML
standard and an old GUI toolkit -- I assume you mean the former)


John


From sombDELETE at pobox.ru  Sun Jan 25 11:39:11 2004
From: sombDELETE at pobox.ru (Serge Orlov)
Date: Sun, 25 Jan 2004 19:39:11 +0300
Subject: trouble w/ unicode file
References: <mailman.752.1074995324.12720.python-list@python.org><bv007p$2ged$1@nadya.doma>
	<mailman.766.1075043602.12720.python-list@python.org>
Message-ID: <bv0rg2$7bp$1@nadya.doma>


"Guilherme Salgado" <salgado at freeshell.org> wrote in message news:mailman.766.1075043602.12720.python-list at python.org...
> On Sun, 2004-01-25 at 06:54, Serge Orlov wrote:
> > "Guilherme Salgado" <salgado at freeshell.org> wrote in message news:mailman.752.1074995324.12720.python-list at python.org...
> > > Hi there,
> > >
> > > I have a python source file encoded in unicode(utf-8) with some
> > > iso8859-1 strings. I've encoded this file as utf-8 in the hope that
> > > python will understand these strings as unicode (<type 'unicode'>)
> > > strings whithout the need to use unicode() or u"" on these strings. But
> > > this didn't happen.
> >
> > You hoped, but you forgot to pray <wink> Why do you think Python
> > should behave this way? There is (an experimental?) option -U that
>
> Ok, ok. I'll remember to pray next time. :-)
> I need to store unicode strings(declared in files) in ZODB, but i don't
> want to use u"" around all my strings (cause most of them are latin-1),
> so i think storing the file as unicode will work. Is there a better way
> for doing this?

Not that I'm aware of.

> > We have a bug here as well. But in your code. The coding must
> > be the same as the coding of your source file. bar.py must be:
> > #-*- coding: latin-1 -*-
> > x = '????????????'
> > print x, type(x)
> >
>
> I didn't understand this (even after some pray) :-)
> My file is encoded in utf-8, look:
> $ file bar.py
> bar.py: UTF-8 Unicode text
>
> Why should i declare it as latin1 encoded though?

Sorry, I was confused by your words "with some iso8859-1 strings".
I thought you were using simple (unaware of encodings) editor and
just added #-*- coding: utf-8 -*- with hope that it will work. You're
right the coding should stay utf-8. After that you have two options:
either use -U option or put u before every string.

-- Serge.






From claird at lairds.com  Thu Jan 22 17:40:31 2004
From: claird at lairds.com (Cameron Laird)
Date: Thu, 22 Jan 2004 22:40:31 -0000
Subject: Buffer overruns (was: Secure Voting software)
References: <20040121174434.28446.00000428@mb-m15.aol.com>
	<7xvfn4lq9m.fsf@ruckus.brouhaha.com>
Message-ID: <1010kavl44l76c4@corp.supernews.com>

In article <7xvfn4lq9m.fsf at ruckus.brouhaha.com>,
Paul Rubin  <http://phr.cx at NOSPAM.invalid> wrote:
			.
			.
			.
>Buffer overruns are just one narrow type of security failure.
			.
			.
			.
Yes and no.  Yes, a security audit needs to consider at least hundreds
of distinct categories of technical hazards, and buffer overruns are
just one of these, and arguably not the riskiest.  HOWEVER, we make up
for that with the frequency with which we do them; that is, although
all the analysis buffer overruns require was available at least twenty
years ago, it remains, in my experience, much the most frequent
identifiable security-pertinent fault our industry writes in, day
after day.  We sure look dumb.

'Course, that's certainly not the fault of Python folk.
-- 

Cameron Laird <claird at phaseit.net>
Business:  http://www.Phaseit.net


From mfranklin1 at gatwick.westerngeco.slb.com  Thu Jan 29 10:56:10 2004
From: mfranklin1 at gatwick.westerngeco.slb.com (Martin Franklin)
Date: Thu, 29 Jan 2004 09:56:10 -0600
Subject: Pausing python programs
In-Reply-To: <40192a20$0$9389$ed9e5944@reading.news.pipex.net>
References: <40192a20$0$9389$ed9e5944@reading.news.pipex.net>
Message-ID: <1075391770.1041.10.camel@m-franklin>

On Thu, 2004-01-29 at 09:41, Graham wrote:
> How can I cause a python program to pause/suspend execution for a period of
> time?  I am checking status of an external system and only want to check
> every second as opposed to my current which checks may times a secnod and
> hogs my cpu in the process!!!
> 
> Thank you to anyone who can help.
> 
> Graham Smith
> 
> PeopleSoft Technical Team Leader
> OXFAM GB
> +44 (1865) 313255
gsmith at oxfam.org.uk


You should really get into pydoc:-)  For example

pydoc time

Help on module time:
                                                                                
NAME
    time - This module provides various functions to manipulate time
values.
                                                                                
FILE
    /usr/local/lib/python2.3/lib-dynload/time.so


<snip>


    Functions:
                                                                                
    time() -- return current time in seconds since the Epoch as a float
    clock() -- return CPU time since process start as a float
    sleep() -- delay for a number of seconds given as a float
    gmtime() -- convert seconds since Epoch to UTC tuple
    localtime() -- convert seconds since Epoch to local time tuple
    asctime() -- convert time tuple to string
    ctime() -- convert time in seconds to string
    mktime() -- convert local time tuple to seconds since Epoch
    strftime() -- convert time tuple to string according to format
specification    strptime() -- parse string to time tuple according to
format specification
    tzset() -- change the local timezone
 


so time.sleep(1) could be what you are after.  

Also don't forget google is you friend :-)

Cheers
Martin


-- 
Martin Franklin <mfranklin1 at gatwick.westerngeco.slb.com>




From bignose-hates-spam at and-benfinney-does-too.id.au  Tue Jan 27 22:19:05 2004
From: bignose-hates-spam at and-benfinney-does-too.id.au (Ben Finney)
Date: 28 Jan 2004 14:09:05 +1050
Subject: Python on portable storage
References: <slrnc1bj85.lot.bignose-hates-spam@iris.polar.local>
	<mailman.832.1075174501.12720.python-list@python.org>
Message-ID: <slrnc1ebmp.14j.bignose-hates-spam@rose.localdomain.fake>

On Mon, 26 Jan 2004 21:34:56 -0600, Jeff Epler wrote:
> One idea would be a directory structure that looks like the source
> tree: [...]

Thanks for this idea.  I probably won't get the time to implement it for
a while, but when I do at least this gives an idea for where to start.

-- 
 \       "A free society is one where it is safe to be unpopular."  -- |
  `\                                                   Adlai Stevenson |
_o__)                                                                  |
Ben Finney <http://bignose.squidly.org/>


From arjen.dijkstraNoSpam at hccnet.nl  Fri Jan 16 07:53:40 2004
From: arjen.dijkstraNoSpam at hccnet.nl (duikboot)
Date: Fri, 16 Jan 2004 13:53:40 +0100
Subject: Setting Window Size using Pack Under Tkinter
References: <8089854e.0401160134.5674a86c@posting.google.com>
	<4007de09$0$151$e4fe514c@dreader5.news.xs4all.nl>
Message-ID: <4007dedc$0$166$e4fe514c@dreader5.news.xs4all.nl>

 from Tkinter import *
 gui=Tk()

 ####code####
 gui.geometry("+%d+%d" %(300, 100))
 gui.resizable(0,0)
 gui.mainloop()

Will work offcourse too.. :-)

cheers,

Arjen



"duikboot" <arjen.dijkstraNoSpam at hccnet.nl> schreef in bericht
news:4007de09$0$151$e4fe514c at dreader5.news.xs4all.nl...
> from Tkinter import *
> gui=Tk()
>
> ####code####
> gui.geometry("+%d+%d" %(300, 100))
> gui.resizable(0,0)
>
> if __name__=='__main__':
>     gui.mainloop()
>
>
>
>
> "Fuzzyman" <michael at foord.net> schreef in bericht
> news:8089854e.0401160134.5674a86c at posting.google.com...
> > I'm having trouble implementing my GUI using Tkinter......
> > I've been working through the Tkinter tutorials from 'Programming
> > Python' and am generally happy enough with the functionality and feel
> > of the results *but* - I can't see how to set the size of the root
> > window (or any top level window) and to stop it being resized........
> >
> > Thanks for any help.
> >
> > Fuzzyman
> >
> >
> > --
> >
> > YAPLP
> > Yet Another Python Links Page
> > http://www.voidspace.org.uk/coollinks/python_links.shtml
> >
> > Python Utils
> > http://www.voidspace.org.uk/atlantibots/pythonutils.html
> >
> > --
> >
> > http://www.Voidspace.org.uk
> > The Place where headspace meets cyberspace. Online resource site -
> > covering science, technology, computing, cyberpunk, psychology,
> > spirituality, fiction and more.
> >
> > ---
> > http://www.atlantibots.org.uk
> > http://groups.yahoo.com/group/atlantis_talk/
> > Atlantibots - stomping across the worlds of Atlantis.
> > ---
> > http://www.fuchsiashockz.co.uk
> > http://groups.yahoo.com/group/void-shockz
> > ---
> >
> > Everyone has talent. What is rare is the courage to follow talent
> > to the dark place where it leads. -Erica Jong
> > Ambition is a poor excuse for not having sense enough to be lazy.
> >          -Milan Kundera
>
>




From ZZZ-ialbert-ZZZ at mailblocks-ZZZ.com-ZZZ  Tue Jan 13 09:28:00 2004
From: ZZZ-ialbert-ZZZ at mailblocks-ZZZ.com-ZZZ (Istvan Albert)
Date: Tue, 13 Jan 2004 09:28:00 -0500
Subject: ProtoCiv: porting Freeciv to Python CANNED
In-Reply-To: <bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
Message-ID: <q4WdndIwAejwnZndRVn-sA@giganews.com>

Brandon J. Van Every wrote:

> all public projects I might conceive of are fundamentally DOA.

There is no argument about that...

Your only talent is trolling. You do it well enough, peppering
your expose with subtle and quasi intelligent insults just to keep
the discussion going. And that's what trolling is all about.

But I don't know whether one can make a living out of that.

i.





From knoppix at laptop.home.net  Sun Jan 11 17:43:32 2004
From: knoppix at laptop.home.net (Knoppix User)
Date: Sun, 11 Jan 2004 16:43:32 -0600
Subject: [Newb] Still not able to solve class attribution
References: <pan.2004.01.11.16.18.09.483280@laptop.home.net>
	<bts1bh$job$02$1@news.t-online.com>
Message-ID: <pan.2004.01.11.22.43.32.222041@laptop.home.net>

On Sun, 11 Jan 2004 18:36:22 +0100, Peter Otten wrote:

You were on the right track, Peter!

Your comment go me thinking some more. The error was not in the last line,
but the second to last.

I have quite a long init method, and the conflict was between the code
that sets up the StaticBitmap, and a prior reference to that code, from a
Button.

Thanks for jarring my mind-track in the right direction!!!!

Steve




From jimmy at retzlaff.com  Fri Jan 16 04:28:44 2004
From: jimmy at retzlaff.com (Jimmy Retzlaff)
Date: Fri, 16 Jan 2004 01:28:44 -0800
Subject: data structures module
Message-ID: <A7B5C22F20EE3C4E95744E2F03F1887F1B8EAD@MAYOR.retzlaff.com>

MetalOne wrote:

> Today, I wanted a priority queue.

As of 2.3 Python does have a priority queue:

http://www.python.org/doc/current/lib/module-heapq.html

Jimmy




From fumanchu at amor.org  Thu Jan  8 10:58:16 2004
From: fumanchu at amor.org (Robert Brewer)
Date: Thu, 8 Jan 2004 07:58:16 -0800
Subject: Descriptor puzzlement
Message-ID: <DE1CF2B4FEC4A342BF62B6B2B334601E561BD6@opus.amorhq.net>

Peter Otten wrote:
> John Roth wrote:
> > It doesn't look like the descriptor protocol is getting
> > invoked at all.
> 
> The descriptor protocol works on the class, not the instance, so 
> 
> class AnotherObject(object):
>     prop = AnObject("snafu")
> 
> or something similar should work. This means in particular 
> that you have to
> store the property's state in the AnotherObject rather than 
> the AnObject
> instance.

I got bit by this myself, a while ago. Would there be any benefit to
providing something like what John wanted, where the descriptor can
maintain its own state, and be referenced by the owner instance (instead
of the owner class)? I could sure use it in a couple of spots where my
__getattr__/__setattr__ code is getting ugly.


Robert Brewer
MIS
Amor Ministries
fumanchu at amor.org



From rganesan at myrealbox.com  Sat Jan 24 11:16:55 2004
From: rganesan at myrealbox.com (Ganesan R)
Date: Sat, 24 Jan 2004 21:46:55 +0530
Subject: Perl vs. Python for text manipulation
References: <69A0D4AB81C51447AD6BA387782B8D64093D8A@midl-mail4.etcconnect.com>
	<028FD9F0-4E01-11D8-BB78-0003934ACDEC@zdome.net>
	<mailman.720.1074906442.12720.python-list@python.org>
	<1013o27e3nb141@corp.supernews.com>
	<ouhdyloduy.fsf@andlx-anamika.cisco.com> <871xpp1i8r.fsf@pobox.com>
Message-ID: <ou4qulnwy0.fsf@andlx-anamika.cisco.com>

>>>>> "John" == John J Lee <jjl at pobox.com> writes:

> Ganesan R <rganesan at myrealbox.com> writes:
>> > Is that all that people mean, though, when they talk about Perl's
>> > superiority for text mangling?  Is there more to it?  --
> [...]
>> The perl "built-in" idioms for text processing is not only a syntactic
>> convenience, there are real performance advantages. For example a simple
>> perl loop like
>> 
>> while (<>) { }
>> 
>> is nearly 6 times slower in python (8 time slower with Python 2.2) using
> [...]

> Did you try 'for line in file:'?  ISTR Tim Peters optimized that (or
> was that fileinput?), precisely because of every hacker and their dog
> running this as a benchmark.

fileinput is not optimized yet, at least I don't remember any mails about
fileinput in python-devel since python 2.3 was released.  I know that it is
slow. for line in file: does seem to be optimized though. The last time I
ran the tests python was definitely twice as slow (which was before python
2.3 was officially released); now it appears to be only about 40% slower. I
need to revisit these crude benchmarks.

Ganesan

--
Ganesan R



From jetman516 at hotmail.com  Thu Jan 15 18:03:54 2004
From: jetman516 at hotmail.com (The Jetman)
Date: 15 Jan 2004 15:03:54 -0800
Subject: [Q & A]Weirdness About Python 2.3x and Its Environment Vars Under
	Windows
Message-ID: <a38d43b0.0401151503.5f7cf20e@posting.google.com>

I just spent the last hour or so trying mightily to 'fix' Python (2.3.3)
under WinME.  Have been using it on various Win9X/XP systems for 
years (since 1.52) for routine scripting.  LOVE IT !!!  Heretofore, 
the ONLY environment variable I've EVER used for ANY Pythonstallation 
was PYTHONPATH (ie. SET PYTHONPATH=.;C:\MYPY;)  However, today I 
started working on a 'new' development machine and I couldn't get 
IDLE or PYTHONWIN to operate at all.  I finally tracked it down to 
one thing:  the absence of the PYTHONHOME env var.

PYTHONWIN would crap out w/ an error dialog about not finding 
pywin.framework.startup and IDLE would simply display an hourglass 
for a sec, then nothing.  I recently heard about PYTHONHOME, added it
to my AUTOEXEC, and suddenly all was working again.

Another problem was that the cmd-line version of PYTHON wouldn't 
find ConfigParser (ie. a std Python module) from a very short, working 
script of mine.

Anyway, my question (at last) is:  has anyone had this occur to 
them ?  I've NEVER had a problem like this, altho I suspect this is 
the 1st time I've installed Python 2.3.  I figure someone else will 
get stumped like this and the thread will help.  Later....Jet


From seanl at chaosring.org  Sat Jan  3 13:40:42 2004
From: seanl at chaosring.org (Sean R. Lynch)
Date: Sat, 03 Jan 2004 10:40:42 -0800
Subject: Creating a capabilities-based restricted execution system
In-Reply-To: <bt6bec$25j$06$1@news.t-online.com>
References: <LmmdnUn4seDeGWuiXTWc-w@speakeasy.net>
	<7xznd58klr.fsf@ruckus.brouhaha.com>
	<MGudndQhy9ieEmuiXTWc-w@speakeasy.net>
	<bt6bec$25j$06$1@news.t-online.com>
Message-ID: <yJacnYxpY-E2kWqiXTWc-w@speakeasy.net>

Martin v. Loewis wrote:
>
> The biggest problem is that new-style classes are both available through
> the type() builtin, and callable to create new instances.
> 
> For example, if you have managed to open a file object f, then
> 
> type(f)("/etc/passwd").read()
> 
> lets you access a different file, bypassing all machinery that may
> have been designed to prevent that from happening.
> 
> Of course, for the specific case of file objects, there is additional
> machinery preventing that from happening, but in the general case,
> there might be more problems in that area. For example, 
> object.__subclasses__() gives you access to quite a lot of stuff.

RestrictedPython avoids this by removing the type() builtin from the 
restricted __builtins__, and it doesn't allow untrusted code to create 
names that start with _. Zope3 has a type() builtin, but it returns a 
proxy (written in C) to the type object to prevent access.

Right now I'm providing a same_type function instead to compare types. 
Later I'll probably start playing around with C proxies.

I think the main thing that's liable to introduce new security problems 
(beyond what RestrictedPython may already have) is the fact that 
RestrictedPython is mostly designed to protect the trusted environment 
from the untrusted environment, and what I'd really like to do is give 
programmers in the untrusted environment a way to create objects and 
pass them around to one another; for example, in the original setup, 
class statements are allowed but not very useful in the restricted 
environment, because objects created from those classes would be 
read-only due to the fact that you can't create any special attributes 
to tell the system how to handle security from within the restricted 
environment, which is why I'm adding private attributes to the system 
and figuring out a way to allow methods defined on a class to assign to 
attributes on instances of that class without allowing all code to do so.


From alert at notification.messagelabs.com  Tue Jan 27 08:51:01 2004
From: alert at notification.messagelabs.com (alert at notification.messagelabs.com)
Date: 27 Jan 2004 13:51:01 -0000
Subject: WARNING. You sent a potential virus or unauthorised code
Message-ID: <20040127135101.13434.qmail@server-7.tower-27.messagelabs.com>

For English instructions please scroll down.

ISION MailScan hat einen potenziellen Virus 
oder eine verd?chtige Datenstruktur in einer 
von Ihnen verschickten oder an Sie 
gesendeten Nachricht entdeckt. 
____________________________________________________________

Einige Informationen zu der infizierten eMail
____________________________________________________________
Zur besseren Identifikation der Nachricht:

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Die Nachricht wurde verschickt am Tue, 27 Jan 2004 13:52:01 +0100
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Scanner 7 (Unpacker) berichtet folgendes:
>>> W32/MyDoom.A in '1536475_3X_AZ-S_PA2__document.scr'


Die Originalnachricht ist in den ISION Quarant?ne_Server umgeleitet 
worden, in 
mail server server-7.tower-27.messagelabs.com (id 1536475_1075211460)
und wird dort f?r 30 Tage gespeichert bevor sie endg?ltig gel?scht wird.
____________________________________________________________

Weitere Hilfe
____________________________________________________________
Lesen Sie bitte die haeufig gestellten Fragen (
FAQ)  fuer eine solche Situation unter
http://www.ision.net/mailscan/faq
Hier werden die meisten Ihrer Fragen 
beantwortet. 
Wenn Sie weitere Informationen ben?tigen 
oder glauben, dass es sich um einen falschen 
Alarm handelt, kontaktieren Sie bitte das 
ISION Customer Interaction Center unter

support at ision.net

Sollten Sie mit dem Support in Kontakt treten, 
geben Sie bitte immer die nachfolgende Virus 
Identifikationsnummer an:
{{{ mail server server-7.tower-27.messagelabs.com (id 1536475_1075211460) }}}
______________________________________

Diese Nachricht wurde von ISION MailScan 
unter Nutzung des MesssageLabs Virus Control 
Centers auf  alle bekannten Viren untersucht. 
Wenn Sie mehr ?ber diese Dienstleistung 
erfahren m?chten, besuchen Sie
http://www.ision.net/mailscan/faq
_________________________________________________________________

*************************ENGLISH*********************************
ISION Mailscan discovered a possible
virus or unauthorised code (such as a joke program or trojan)
in an email sent by you.

Please read this whole email carefully. It explains what has
happened to your email, which suspected virus has been caught,
and what to do if you need help.

____________________________________________________________

Some details about the infected message
____________________________________________________________

To help identify the email:

The message was titled 'HELLO'
The message date was Tue, 27 Jan 2004 13:52:01 +0100
The message identifier was (empty)
The message recipients were 
    john at spiegel.de


To help identify the virus:

Scanner 7 (Unpacker) reported the following:

>>> W32/MyDoom.A in '1536475_3X_AZ-S_PA2__document.scr'


The message was diverted into the virus holding pen on
mail server server-7.tower-27.messagelabs.com (id 1536475_1075211460)
and will be held for 30 days before being destroyed.


____________________________________________________________

What should you do now?
____________________________________________________________

If you sent the email from a corporate network, you should first
contact your local Helpdesk or System Administrator for advice.
They will be able to help you disinfect your workstation.

If you sent the email from a personal or home account, you will
need to disinfect your computer yourself. To do this you will
need an anti_virus program. We suggest using one of the leading
industry anti_virus packages such as McAfee, F_Secure or Cybersoft,
which cost ?15_?30 per copy.
____________________________________________________________

Getting more help
____________________________________________________________

You may like to read the Support FAQs at
http://www.ision.net/english/mailscan/faq 
These will answer many of the most common queries.

If you believe this message to be a false alarm or you require
further assistance, you can email ISION UK Support at:_

   	support at ision.net.uk

or contact ISION Internet by telephone on:_

	+44 (0) 208 293 73 00 

Please quote the following Virus Pen ID when contacting Support.
{{{ mail server server-7.tower-27.messagelabs.com (id 1536475_1075211460) }}}

________________________________________________________________________
This email has been scanned for all viruses by the MessageLabs Email
Security System. For more information on a proactive email security
service working around the clock, around the globe, visit
http://www.messagelabs.com
________________________________________________________________________



From poelzi at poelzi.org  Tue Jan  6 14:26:12 2004
From: poelzi at poelzi.org (daniel.poelzleithner)
Date: Tue, 06 Jan 2004 20:26:12 +0100
Subject: Problems with threads and embedding
In-Reply-To: <3FFAC395.9080900@poelzi.org>
References: <3FFAC395.9080900@poelzi.org>
Message-ID: <3FFB0BD4.1030502@poelzi.org>

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

daniel.poelzleithner wrote:

| Every script is started in an own interpreter instance and registers
| some callback functions for different events.
| The module is threadsafe and everything works just fine, with one
| exceptions, dead threads are not removed from the process list.

Ok, the problem is solved. It seems that my installation is just broken :(

On other machines, this problem doesn't occure. Days spent for nihil....


regards
~ Daniel

- --
nihil me cirumdat

.. . .. ... . . .. . ... . .. . ... . . .
pgp key @ http://files.poelzi.org/pgp.txt
ED80 E53D 5269 4BB1 1E73 3A53 CBF9 A421 0A7B 003D
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.4 (GNU/Linux)
Comment: Using GnuPG with Debian - http://enigmail.mozdev.org

iD8DBQE/+wvUy/mkIQp7AD0RAtqmAKDPxw0bwcpEPiedG2OK5mYiEFNb7wCfUQF1
Ae8S1jhvaRLsHtFQZBK7Idw=
=SVbE
-----END PGP SIGNATURE-----




From jcarlson at nospam.uci.edu  Sun Jan 25 13:02:30 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Sun, 25 Jan 2004 10:02:30 -0800
Subject: makeExe.py
In-Reply-To: <mailman.761.1075035209.12720.python-list@python.org>
References: <mailman.761.1075035209.12720.python-list@python.org>
Message-ID: <bv10fm$ocl$1@news.service.uci.edu>


> package = re.split("/",package[len(package) - 1])
> package = re.split(".py",package[len(package) - 1])

You'll find the readability increases when using:

package = re.split("/", package[-1])
package = re.split(".py", package[-1])

Negative indices are your friends.
  - Josiah


From bignose-hates-spam at and-benfinney-does-too.id.au  Mon Jan 26 21:45:52 2004
From: bignose-hates-spam at and-benfinney-does-too.id.au (Ben Finney)
Date: 27 Jan 2004 13:35:52 +1050
Subject: efficient updating of nested dictionaries
References: <H%_Qb.2609$925.1917@nwrddc02.gnilink.net>
	<mailman.786.1075088534.12720.python-list@python.org>
	<bv2e21$j5e$2@news.service.uci.edu>
	<mailman.831.1075171050.12720.python-list@python.org>
Message-ID: <slrnc1blcf.lot.bignose-hates-spam@iris.polar.local>

On Mon, 26 Jan 2004 21:32:28 -0500, Rich Krauter wrote:
> Oh crap. Sorry about the html emails. I've been meaning to turn that
> off. Thanks for reminding me.

Much better!  Thanks for being considerate.

-- 
 \     "When I turned two I was really anxious, because I'd doubled my |
  `\   age in a year. I thought, if this keeps up, by the time I'm six |
_o__)                               I'll be ninety."  -- Steven Wright |
Ben Finney <http://bignose.squidly.org/>


From fumanchu at amor.org  Thu Jan  8 18:29:50 2004
From: fumanchu at amor.org (Robert Brewer)
Date: Thu, 8 Jan 2004 15:29:50 -0800
Subject: count objects in a list and random numb gen
Message-ID: <DE1CF2B4FEC4A342BF62B6B2B334601E561BD8@opus.amorhq.net>

Bart Nessux wrote:
> New to Python... trying to figure out how to count the 
> objects in a list 
> and then map the count to the objects or convert the list to 
> a dict... I 
> think the latter would be better as I need a number 
> associated with each 
> entry. Any pointers?

You want enumerate().

>>> for index, val in enumerate(['a', 'b', 'c']):
... 	print index, val
... 	
0 a
1 b
2 c


FuManChu



From antonmuhin at rambler.ru  Mon Jan 19 08:02:02 2004
From: antonmuhin at rambler.ru (anton muhin)
Date: Mon, 19 Jan 2004 16:02:02 +0300
Subject: Escaping slashes (double backslash plague)
In-Reply-To: <mailman.500.1074516185.12720.python-list@python.org>
References: <mailman.500.1074516185.12720.python-list@python.org>
Message-ID: <bugklk$hggbg$1@ID-217427.news.uni-berlin.de>

Aloysio Figueiredo wrote:
> I need to replace every ocurrence of '/' in s by '\/'
> in order to create a file named s. My first attempt
> was:
> 
> s = '\/'.join(s.split('/'))
> 
> but it doesn't work:
> 
> 
>>>>s = 'a/b'
>>>>s = '\/'.join(s.split('/'))
why not replace: s.replace('\/', '/')?

>>>>s
> 
> 'a\\/b'
> 
>>>>repr(s)
> 
> "'a\\\\/b'"
Try print s, and you'll see what you want.
> 
> 
> '\/'.join() escapes the backslashes and I don't know
> why. 
> 
> Any help?
> 
> Aloysio Figueiredo
> 
regards,
anton.


From mhammond at skippinet.com.au  Sat Jan 31 22:56:59 2004
From: mhammond at skippinet.com.au (Mark Hammond)
Date: Sun, 01 Feb 2004 14:56:59 +1100
Subject: What's the difference between win32ui and win32gui?
In-Reply-To: <543bb43c.0401311928.3be1fe36@posting.google.com>
References: <543bb43c.0401311928.3be1fe36@posting.google.com>
Message-ID: <bvhteg$2aq4$1@arachne.labyrinth.net.au>

Corwan wrote:
> What's the difference between win32ui and win32gui?

win32ui is an attempt to wrap MFC, which is itself an object oriented 
wrapper around the Windows GUI API (ie, a "window" is an object, and has 
methods).  win32gui is a lower-level interface to the raw API (ie, a 
window is represented by an integer handle, and all functions are global)

Naming things has never been my strong point, especially given the 
benefit of hindsight <wink>

Mark.



From No.Spam.mc at No.Spam.mclaveau.No.Spam.com  Sat Jan 10 15:20:34 2004
From: No.Spam.mc at No.Spam.mclaveau.No.Spam.com (Michel Claveau/Hamster)
Date: Sat, 10 Jan 2004 21:20:34 +0100
Subject: Multithreaded COM server problem...
References: <5a90009ufdd66okc8osajrn1a5kokp86mk@4ax.com>
Message-ID: <btpmlu$5re$1@news-reader1.wanadoo.fr>

Hi !


 * Sorry for my bad english : french is very more easy, and nice ;-)    *

I have try another way. I use a procedure for manage thread :

GlobalTacheID=[None]*16

def tache(ordre, numtache=1, nomtache=None, fonction=None):
    global GlobalTacheID
    import threading
    if ordre=="Lance":
        GlobalTacheID[numtache] =
threading.Thread(target=fonction,name=nomtache)
        GlobalTacheID[numtache].start()
        print(nomtache+' num.'+str(numtache))
    elif ordre=="Liste":
        return(string.join(threading.enumerate(),'\n'))
    elif ordre=="Etat":
        return(str(GlobalTacheID[numtache].isAlive()))

And, in my public_method, i call this procedure, with the parameters
"ordre=Lance" for run a thread, "ordre=Etat" for see his state (fonction=
the name of the method 'threaded').

And it's OK. I can run a thread from an Excel-COM-client. I can also run an
thread on a method caontained in a string gived by Excel.

Python is very smart-dynamic-agile language.

Bonne soir?e
--
Michel Claveau
m?l : http://cerbermail.com/?6J1TthIa8B
site : http://mclaveau.com




From sross at connectmail.carleton.ca  Sat Jan  3 15:20:01 2004
From: sross at connectmail.carleton.ca (Sean Ross)
Date: Sat, 3 Jan 2004 15:20:01 -0500
Subject: Integer math question
References: <3987e01c.0401030832.114c6f2a@posting.google.com>
	<11EJb.20461$Vl6.3782481@news20.bellglobal.com>
	<kTEJb.724242$HS4.5376202@attbi_s01>
Message-ID: <5sFJb.20923$Vl6.3818930@news20.bellglobal.com>

"Rainer Deyke" <rainerd at eldwood.com> wrote in message
news:kTEJb.724242$HS4.5376202 at attbi_s01...
> Sean Ross wrote:
> > a = bq + r       and  0<=r<b       [1]
>
> But 0 <= r < b is a contradiction when b < 0.
>
> -- 
> Rainer Deyke - rainerd at eldwood.com - http://eldwood.com
>
>

Hmm....

>>> a = 5
>>> b = -10
>>> q,r = divmod(a,b)
>>> q
-1
>>> r
-5
>>>

Here, the division algorithm does not apply (b is a negative integer).
Perhaps there's some other theorem for this case?
b<r<=0, when b < 0? I don't know.





From arjen.dijkstraNoSpam at hccnet.nl  Mon Jan 19 07:14:11 2004
From: arjen.dijkstraNoSpam at hccnet.nl (duikboot)
Date: Mon, 19 Jan 2004 13:14:11 +0100
Subject: Oracle to Mysql, I'm (still) lost...
Message-ID: <400bca16$0$147$e4fe514c@dreader12.news.xs4all.nl>

Hello all,

I still can't convert Oracle tables to a Mysql database. See thread:
http://groups.google.com/groups?hl=en&lr=&ie=UTF-8&oe=utf-8&threadm=mailman.
282.1073834719.12720.python-list%40python.org&rnum=1&prev=/groups%3Fsourceid
%3Dmozclient%26ie%3Dutf-8%26oe%3Dutf-8%26q%3Dpython%2Boracle%2Bmysql

The tables in Oracle and Mysql are the same. Is there anyone who can help me
with this?

Thanks in advance,

Arjen

#######code######
import cx_Oracle, MySQLdb
from time import time

tabellen=["machine", "machinegroup", "machines", "operation", "orders",
          "run", "step"]

tijd=time()
conO=cx_Oracle.connect("some/some")
cursO=conO.cursor()
conMy=MySQLdb.Connect("localhost", db="some")
cursMy=conMy.cursor()

for tabel in tabellen:
    cursO.execute("select * from " + tabel)
    cursMy.execute("truncate " + tabel)
    #print cursO.description
    a_oracle=cursO.fetchone()
    cursMy.execute("insert into %s values %s", (tabel, a_oracle))

conO.close()
conMy.close()
print "\n\nklaar in :\n"
print time()-tijd, " seconden\n\n"

#####error####
Traceback (most recent call last):
  File "A:/tabellen2.py", line 20, in ?
    cursMy.execute("insert into %s values %s", (tabel, a_oracle))
  File "E:\Python23\Lib\site-packages\MySQLdb\cursors.py", line 95, in
execute
    return self._execute(query, args)
  File "E:\Python23\Lib\site-packages\MySQLdb\cursors.py", line 114, in
_execute
    self.errorhandler(self, exc, value)
  File "E:\Python23\Lib\site-packages\MySQLdb\connections.py", line 33, in
defaulterrorhandler
    raise errorclass, errorvalue
ProgrammingError: (1064, 'You have an error in your SQL syntax.  Check the
manual that corresponds to your MySQL server version for the right syntax to
use near \'\'machine\' values ("\'230KM\'", "\' \'", "\'230KM\'",
"\'1980-01-01 00:')
>>>




From tepihlaj at NOpaju.SPAMoulu.fi  Mon Jan  5 11:17:52 2004
From: tepihlaj at NOpaju.SPAMoulu.fi (Tero Pihlajakoski)
Date: 5 Jan 2004 16:17:52 GMT
Subject: Python/C and PYTHONPATH
References: <btbn3o$5oo$1@ousrvr3.oulu.fi>
	<mailman.98.1073310473.12720.python-list@python.org>
Message-ID: <btc2ng$alg$1@ousrvr3.oulu.fi>

Jeff Epler <jepler at unpythonic.net> wrote:
> You'd need to tell us how you're invoking Python.  When the Python

Take a look at:  
http://www.python.org/doc/current/ext/pure-embedding.html.  Basically,
it's about same (and I tested with it too, same results: failing)

> executable is invoked without arguments, the current directory is on the
> sys.path:

> $ python
> Python 2.2.2 (#1, Feb 24 2003, 19:13:11) 
> [GCC 3.2.2 20030222 (Red Hat Linux 3.2.2-4)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
>>>> import sys
>>>> sys.path[0]
> ''

> When you run a script, the directory of that script is in sys.path[0]:
> $ echo "import sys; print sys.path[0]" > /tmp/script.py
> $ python /tmp/script.py
> /tmp

If I run "python" as a shell (python <scriptname>), everything works ok.
Says path is ok: [ '', '<thelib>', ... ]. However, from C, something works
differently: PyRun_SimpleString("import sys\nprint sys.path"); Shows no ''
(the rest is ok). The question is: Why is there no '', and what is the
"official/safe" way to set it? Just insert it to the list? (Setting
"PYTHONPATH= " helps, but I'd like it to run "off the box")

Tero



From randall at tnr.cc  Sat Jan  3 18:38:20 2004
From: randall at tnr.cc (Randall Smith)
Date: Sat, 03 Jan 2004 23:38:20 GMT
Subject: datetime string to datetime object converter
Message-ID: <MnIJb.33778$xU1.16252@fe1.texas.rr.com>

Is there an existing module or script that can convert a datetime string 
of unknown format to a python datetime object ?

Randall



From usenet at mail-2-me.com  Fri Jan 30 07:44:50 2004
From: usenet at mail-2-me.com (Dirk Hagemann)
Date: 30 Jan 2004 04:44:50 -0800
Subject: NetGetAnyDCName() - get PDC of a foreign WinNT-domain
References: <mailman.844.1075198899.12720.python-list@python.org>
Message-ID: <a37aa972.0401300444.53c061bf@posting.google.com>

Tim Golden <tim.golden at viacom-outdoor.co.uk> wrote in message news:<mailman.844.1075198899.12720.python-list at python.org>...
> [... snip my suggestion of pdc = win32net.NetGetAnyDCName (None,
> "name_of_other_domain") ...]
> 
> >From: usenet at mail-2-me.com [mailto:usenet at mail-2-me.com]
> >
> >Thanks for your help, but that does not work. I get an error message
> >which sais it can't reach the domain.
> >But I'm sure did not make an syntax-error, because if I enter my own
> >domain it works.
> >
> >Any other idea?
> >
> >Dirk
> >
> >
> 
> To ask the obvious question: do you definitely have all
> the necessary security / connectivity in place to reach
> the domain controller on that domain?
> 
> Can you log onto it normally with whatever name you're
> running under now?
> 
> (I don't have more than one domain here, so it's difficult
> for me to test)
> TJG
> 


I can reach the other domains and I have all rights. That's no the problem.

Dirk


From bart_nessux at hotmail.com  Tue Jan 27 09:00:38 2004
From: bart_nessux at hotmail.com (Bart Nessux)
Date: Tue, 27 Jan 2004 09:00:38 -0500
Subject: threads
Message-ID: <bv5qu7$hap$1@solaris.cc.vt.edu>

Could someone explain the concept of threads and how I might use them in 
Python? I was a math major, not a CS major (theory instead of practice). 
Most of my programming knowledge has grown out of system administration 
and shell scripting, not professional software development.

How could I make this script threaded, and why should I, how would it 
benefit me? The script already takes up 100% CPU resources, what would 
using threads gain for me:

#!/usr/bin/python	#change this to your Python's path

def cpu_test():
    x = 0
    while x < 999999999:
       x = x + 1
       print x
    cpu_test()
cpu_test()

If the above is not suitable for threading, please give me a short 
example of something that is.

Thanks!!!



From LittleDanEhren at yahoo.com  Sat Jan 31 21:08:15 2004
From: LittleDanEhren at yahoo.com (Daniel Ehrenberg)
Date: 31 Jan 2004 18:08:15 -0800
Subject: Python vs. Io
References: <711c7390.0401291301.3f95794@posting.google.com>	<D6wSb.6538$qU3.576425@news20.bellglobal.com>	<711c7390.0401301726.3e38da27@posting.google.com>
	<mailman.1078.1075571238.12720.python-list@python.org>
Message-ID: <711c7390.0401311808.3914a94b@posting.google.com>

> Do you know why the creator of IO decided not to use the now-ubiquitous 
> "." operator? I don't know whether I can define a "." operator that has 
> the appropriate behaviour but that wouldn't help anyhow.
> 
>   Paul Prescod

In the opinion of the creators of Io, a space looked cleaner. Using a
period looks kinda like you're finishing a sentence and starting a new
one. Consider the following syntaxes:

Dog barks //Io
Dog.barks() #Python

Regardless of which one is more common, which looks more like
language?
You say that "." is more ubiquitous, but "{}" is more ubiquitous than
":" by far, yet Python uses the latter and we don't complain. (note
that in Io, unlike other languages with similar syntax such as Ruby,
functions are first class objects.)

Daniel Ehrenberg


From adonisv at REMOVETHISearthlink.net  Mon Jan 19 21:46:48 2004
From: adonisv at REMOVETHISearthlink.net (Adonis)
Date: Tue, 20 Jan 2004 02:46:48 GMT
Subject: Launching Wordpad on Windows
References: <buhtvp$l0j$1@news.Stanford.EDU>
Message-ID: <sE0Pb.15907$q4.10777@newsread3.news.atl.earthlink.net>

"Patrick L. Nolan" <pln at razzle.Stanford.EDU> wrote in message
news:buhtvp$l0j$1 at news.Stanford.EDU...
> I'm trying to find a clean way to launch a Wordpad editor
> on Windows.  By "clean", I mean that it should work on as
> many versions of Windows as possible, and it shouldn't
> require installing any extra software.  I assume everyone
> has win32api and its friends.
>
> The problem is to find the path to wordpad.exe.  At first
> I just copied the path from my XP machine:
> c:\Program Files\Windows NT\Accessories\WORDPAD.EXE
>
> I verified that the same path works on W2K, but I don't
> know about older versions.  With some labor I was able
> to come up with a longer, more obfuscated bit of code:
>
> item = "SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\App
Paths\\WORDPAD.EXE"
> key = win32api.RegOpenKey(win32con.HKEY_LOCAL_MACHINE, item, 0,
>   win32con.KEY_QUERY_VALUE)
> info = win32api.RegQueryValueEx(key, None)
> win32api.RegCloseKey(key)
> editor = win32api.ExpandEnvironmentStrings(info[0])
>
> I would like to solicit learned opinions about this.  Which
> version will work in more versions of Windows?  Is there a
> better approach?
>
> -- 
> *   Patrick L. Nolan                                          *
> *   W. W. Hansen Experimental Physics Laboratory (HEPL)       *
> *   Stanford University                                       *


This works for me:
(Using WinXP Pro)

Python 2.3.3 (#51, Dec 18 2003, 20:22:39) [MSC v.1200 32 bit (Intel)] on
win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import os
>>> os.system("start wordpad")
0

Hope this helps.

Adonis




From nomail at nospam.net  Mon Jan 12 04:58:45 2004
From: nomail at nospam.net (Olaf Meyer)
Date: Mon, 12 Jan 2004 09:58:45 GMT
Subject: building strings with variable input
Message-ID: <pduMb.6321$g4.137247@news2.nokia.com>

Sometimes if find it clumsy unsing the following approach building strings:

cmd = "%s -start %s -end %s -dir %s" % (executable, startTime, endTime, 
directory)

Especially if you have a lot of variable input it makes it hard to match 
the variables to the proper fields. From other scripting languanges I'm 
used to something like:

  $cmd = "$executable -start $startTime -end $endTime -dir $directory"

This makes it very easy to see how the string is actually built. You 
dont't have to worry where which variables go.

Is there a similar way to do this in python?

Thanks,
   Olaf


From __peter__ at web.de  Thu Jan  8 04:58:48 2004
From: __peter__ at web.de (Peter Otten)
Date: Thu, 08 Jan 2004 10:58:48 +0100
Subject: Rookie Speaks
References: <3FFC9855.3070901@lawson.com>
Message-ID: <btj9d5$o0a$06$1@news.t-online.com>

William S. Perrin wrote:

I thinke your function has a sane design :-) XML is slow by design, but in
your case it doesn't really matter, because is probably I/O-bound, as
already pointed out by Samuel Walters.

Below is a slightly different approach, that uses a class:

class Weather(object):
    def __init__(self, url=None, xml=None):
        """ Will accept either a URL or a xml string,
            preferrably as a keyword argument """
        if url:
            if xml:
                # not sure what would be the right exception here
                # (ValueError?), so keep it generic for now
                raise Exception("Must provide either url or xml, not both")
            sock = urllib.urlopen(url)
            try:
                xml = sock.read()
            finally:
                sock.close()
        elif xml is None:
            raise Exception("Must provide either url or xml")
        self._dom = minidom.parseString(xml)

    def getAttrFromDom(self, weatherAttribute):
        a =  self._dom.getElementsByTagName(weatherAttribute)
        return a[0].firstChild.data

    def asRow(self):
        # this will defeat lazy attribute lookup
        return "%13s\t%s\t%s\t%s\t%s\t%s\t%s" % (self.name,
            self.fahrenheit, self.wind, self.barometric_pressure,
            self.dewpoint, self.relative_humidity, self.conditions)
        return

    def __getattr__(self, name):
        try:
            value = self.getAttrFromDom(name)
        except IndexError:
            raise AttributeError(
                "'%.50s' object has no attribute '%.400s'" %
(self.__class__, name))
        # now set the attribute so it need not be looked up
        # in the dom next time
        setattr(self, name, value)
        return value

This has a slight advantage if you are interested only in a subset of the
attributes, say the temperature:

for url in listOfUrls:
    print Weather(url).fahrenheit

Here getAttrFromDom() - the equivalent of your getattrs() - is only called
once per URL. The possibility to print a tab-delimited row is still there, 

print Weather(url).asRow()

but will of course defeat this optimization scheme.

Peter


From usenet_spam at janc.invalid  Wed Jan 21 22:56:14 2004
From: usenet_spam at janc.invalid (JanC)
Date: Thu, 22 Jan 2004 03:56:14 GMT
Subject: Help, *.CHM, etc
References: <90f2d9db.0401201803.6f2adbf8@posting.google.com>
	<90f2d9db.0401210935.428e0a0e@posting.google.com>
Message-ID: <Xns9478323A09047JanC@213.119.4.35>

its1louder at yahoo.com (Tom) schreef:

> As for the other question, a portable html browser that looks & feels
> like the chm help browser.  I realized that Boa Constructor Project
> has such a component, since I've used Boa help in windows and unix.  I
> wonder if anyone has written a cross-platform CHM decoder and browser
> that has the help browser look & feel.  I can't find one, but it seems
> that python would be a great language to make such a thing.  Maybe
> I'll take a crack if it hasn't been done.  I like monolithic,
> compressed help vs. a big directory full of html.

helpviewer.py in site-packages/wxPython/tools is part of wxPython, not Boa:

"""
helpviewer.py   --  Displays HTML Help in a wxHtmlHelpController window.

Usage:
    helpviewer [--cache=path] helpfile [helpfile(s)...]

    Where helpfile is the path to either a .hhp file or a .zip file
    which contians a .hhp file.  The .hhp files are the same as those
    used by Microsoft's HTML Help Workshop for creating CHM files.
"""


Also try xCHM for a cross-platform .CHM viewer:
<http://xchm.sourceforge.net/>

-- 
JanC

"Be strict when sending and tolerant when receiving."
RFC 1958 - Architectural Principles of the Internet - section 3.9


From amuys at shortech.com.au  Thu Jan 15 23:58:43 2004
From: amuys at shortech.com.au (Andrae Muys)
Date: 15 Jan 2004 20:58:43 -0800
Subject: Suggested generator to add to threading module.
Message-ID: <7934d084.0401152058.164a240c@posting.google.com>

Found myself needing serialised access to a shared generator from
multiple threads.  Came up with the following

def serialise(gen):
  lock = threading.Lock()
  while 1:
    lock.acquire()
    try:
      next = gen.next()
    finally:
      lock.release()
    yield next

I considered suggesting it for itertools, but really it's thread
specific so I am suggesting it for the threading module.

Andrae Muys


From w.henney at astrosmo.unam.mx  Fri Jan 23 09:43:37 2004
From: w.henney at astrosmo.unam.mx (Will Henney)
Date: 23 Jan 2004 06:43:37 -0800
Subject: prog/lib to draw graphs
References: <buofpq$1ra$06$1@news.t-online.com>
Message-ID: <9ddba974.0401230643.668a717a@posting.google.com>

Florian Lindner <Florian.Lindner at xgm.de> wrote in message news:<buofpq$1ra$06$1 at news.t-online.com>...
> Hello,
> I'm looking for a program or python library to draw graphs.
> They should look like the that:
> 
> 
> /--------\                         /--------\
> | Node A | ------ belongs to ----> | Node B |
> \--------/                         \--------/
> 
> Which is a result of the function call like that:
> 
> connectNodes(firstNode, secondNode, description, lineStyle)
> connectNodes("Node A", "Node B", "belongs to", dashed)
> 
> It should have a open scalable vector format as output (DVI, SVG, PDF, ...)
> and should be able to make automatic optimal placement of the items.

Since you mention DVI you probably know about LaTeX. You might
want to try its `psfrag' package, which can do all you want and
more. Learning curve is a bit steep, but the results are _very_
high quality. Nothing to do with Python though......


From michael at foord.net  Fri Jan  9 05:12:32 2004
From: michael at foord.net (Fuzzyman)
Date: 9 Jan 2004 02:12:32 -0800
Subject: Python Utils - A simple config file parser and output object
References: <8089854e.0401070044.1e8116ad@posting.google.com>
Message-ID: <8089854e.0401090212.4826925d@posting.google.com>

I've done a slight update to these (v1.0.1 :-) a couple of bugfixes
and added a couple of small but nifty features........ (all to
ConfigObj)

I have to use google groups to post these messages as our work
firewall block nntp.... I'm thinking of building a newsgroup reader
that uses google groups via http but provides a better interface...
anyone interested ??

Fuzzy

michael at foord.net (Fuzzyman) wrote in message news:<8089854e.0401070044.1e8116ad at posting.google.com>...
> A couple of little scripts I've written for my python project
> (AAAcontroller - see www.atlantibots.org.uk) might be useful to others
> - so I've stuck them up on the web :
> 
> http://www.voidspace.org.uk/atlantibots/pythonutils.html
> 
> They're my new config object - ConfigObj - and my output object
> StandOut.......
> 
> ConfigObj parses and updates simple config files (including multiple
> values for keywords, preserving comments, and updating sections of the
> file).
> StandOut is an output object that can print messages to the screen
> *and* to a logfile.....
> 
> 
> Fuzzy
 
 -- 
 
 http://www.Voidspace.org.uk 
 The Place where headspace meets cyberspace. Online resource site -
 covering science, technology, computing, cyberpunk, psychology,
 spirituality, fiction and more.
 
 ---
 http://www.atlantibots.org.uk
 http://groups.yahoo.com/group/atlantis_talk/
 Atlantibots - stomping across the worlds of Atlantis.
 ---
 http://www.fuchsiashockz.co.uk   
 http://groups.yahoo.com/group/void-shockz
 ---
 
 Everyone has talent. What is rare is the courage to follow talent
  to the dark place where it leads. -Erica Jong
 Ambition is a poor excuse for not having sense enough to be lazy.
          -Milan Kundera


From nav+posts at bandersnatch.org  Fri Jan 16 11:05:09 2004
From: nav+posts at bandersnatch.org (Nick Vargish)
Date: 16 Jan 2004 11:05:09 -0500
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
Message-ID: <m3hdyvswui.fsf@tanelorn.bandersnatch.org>

"Brandon J. Van Every" <try_vanevery_at_mycompanyname at yahoo.com> writes:

> I've also become extremely disillusioned with Open Source developers.
> Basically, for a commercially minded developer such as myself, I don't think
> they're any value add at all.

"I've become very disillusioned with cats. For a stick-fetching minded
person like myself, I don't think they make good pets at all."

Well, duh!

> I'm also starting to downright despise Linuxers.  If I see another project
> that's "cross-platform, so long as your platform is Linux," I'm going to cut
> someone's head off.

And you seemed to want something cross-platform, as long as it runs on
.NET. I don't see your position being any better, from a
cross-platform standpoint, than that of the "Linuxers".

Wait, let's look at the FreeCiv download page:
http://freeciv.org/download.phtml... I even see Win32, Mac OS-X, and
OS/2. That seems pretty damn cross-platform to me.

> Rather, it's always the induhvidual's responsibility to
> download and install all the needed component libraries.

If their distro doesn't include the components, they will go and get
them, or switch to a different distro. Your preferred platform comes
in only one distro, which means there's no incentive for the provider
to include a wide selection of components. Actually, your provider is
disincentivesed from including components other than the ones they
control.

Other than being frustrating for you, I think the Linuxers have made a
much more rational choice of platforms than you have.

> Or requiring Cygwin or MinGW, which real Windows developers don't want to
> use.

Where "real Windows developers" == "Brandon Van Every". I see plenty
of open source Windows projects with compilation instructions that
require the use of Cygwin or MinGW. 

> Whether my Freeciv VS .NET 2003 build makes it into the official Freeciv
> source pool remains to be seen.  The Freeciv people are, after all, a bunch
> of Linuxers.

I'm guessing it won't, especially since rejecting it means they won't
have to continue dealing with someone like you.

Consider me trolled,

Nick

-- 
#  sigmask  ||  0.2  ||  20030107  ||  public domain  ||  feed this to a python
print reduce(lambda x,y:x+chr(ord(y)-1),' Ojdl!Wbshjti!=obwAcboefstobudi/psh?')


From dave at pythonapocrypha.com  Fri Jan  9 17:48:47 2004
From: dave at pythonapocrypha.com (Dave Brueck)
Date: Fri, 9 Jan 2004 15:48:47 -0700
Subject: Straw poll on Python performance (was Re: Python is far from a
	top performer ...)
Message-ID: <027401c3d702$be589a50$6401fea9@YODA>

Dave wrote:
> I program in Python full-time and each spend approximately zero hours

> optimizing. In the past two years I can think of two instances in which I
went
> into heavy optimization mode: one was for a web server that needed to handle
> hundreds of requests per second and the other was a log processor that needed
> to parse and process several gigabytes of log data per hour.
>
> In the server I added a tiny C extension to make use of the Linux sendfile
API,
> all the other optimizations were algorithmic. In the log processor all the
> optimizations ended up being either algorithmic or doing fewer dumb things
> (like recomputing cacheable data).
>
>
>




From bart_nessux at hotmail.com  Tue Jan 13 09:43:23 2004
From: bart_nessux at hotmail.com (Bart Nessux)
Date: Tue, 13 Jan 2004 09:43:23 -0500
Subject: Make a function call itself after set amount of time
In-Reply-To: <bu0v1v$qio$1@solaris.cc.vt.edu>
References: <bu0v1v$qio$1@solaris.cc.vt.edu>
Message-ID: <bu106b$s16$1@solaris.cc.vt.edu>

Bart Nessux wrote:
> How do I make a function call itself every 24 hours. Also, is there a 
> way to start the program automatically w/o depending on the OS functions 
> like 'Task Scheduler' or 'Start Up Items'... this is on Windows 2k and 
> xp. Below is an example of what I'm trying to do.
> 
> TIA
> 
> def ipconfig_email():
>    from email.MIMEText import MIMEText
>    import smtplib
>    import time
>    import os
> 
>    u = "user name"        #Change This to user's name.
>    f = "my-email-addy"
>    t = "my-email-addy"
> 
>    fp0 = os.popen("ipconfig /all", "r")
>    fp1 = os.popen("psinfo -d -s", "rb")
>    msg = MIMEText(fp0.read() + fp1.read())
>    fp0.close()
>    fp1.close()
> 
>    msg["Subject"] = "%s's IPconfig Report" % u
>    msg["From"] = f
>    msg["To"] = t
> 
>    h = "my.smtp.server"
>    s = smtplib.SMTP(h)
>    s.sendmail(f, t, msg.as_string())
>    s.quit()
>    time.sleep(86400)    #24 hour sleep
>    HOW_DO_I_CALL_THE_FUNCTION_AGAIN?
> 
> ipconfig_email()
> 

I figured it out. I added this to the function definition:
ipconfig_email()

I feel like an ass, sorry to bother you guys!




From jcarlson at nospam.uci.edu  Sun Jan 25 20:09:40 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Sun, 25 Jan 2004 17:09:40 -0800
Subject: Guardian: open source is a throwback says Jack Schofield
In-Reply-To: <bv1jkf$g46$1@namru.matavnet.hu>
References: <64cff82f.0401251143.328388bd@posting.google.com>
	<mailman.772.1075066543.12720.python-list@python.org>
	<bv1jkf$g46$1@namru.matavnet.hu>
Message-ID: <bv1pgj$ctl$3@news.service.uci.edu>


> Either that or Microsoft. ;-)  Or he's plain stupid.
> 
> Mikl?s

Never underestimate the power of stupidity (or ignorance, or denial, or...).

Speaking of which...
http://www.whitehouse.gov/news/releases/2004/01/20040122-5.html

  - Josiah


From peter at engcorp.com  Tue Jan  6 08:34:32 2004
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 06 Jan 2004 08:34:32 -0500
Subject: Starting a script interactively?
References: <37d5fe8f.0401021305.349a440@posting.google.com>
Message-ID: <3FFAB968.3B8DDDC1@engcorp.com>

David Klaffenbach wrote:
> 
> Is there a way from within a python script to cause the interpreter to
> be in interactive mode after the script finishes?

Added in Python 2.3, according to http://www.python.org/2.3/highlights.html:

PYTHONINSPECT - A program can now set the environment variable $PYTHONINSPECT to 
some string value in Python, and cause the interpreter to enter the interactive 
prompt at program exit, as if Python had been invoked with the -i option. 


In other words, this should work:

import os
os.environ['PYTHONINSPECT'] = '1'

(untested)

-Peter


From jmob at unm.edu  Mon Jan 12 04:49:45 2004
From: jmob at unm.edu (Jason Mobarak)
Date: Mon, 12 Jan 2004 02:49:45 -0700
Subject: Division oddity
In-Reply-To: <7at3005sjtd6clgfm6e7v1gq83ohlrc2td@4ax.com>
References: <ssn3009029rrug3l8dk1pn06tqd019ucld@4ax.com>
	<7at3005sjtd6clgfm6e7v1gq83ohlrc2td@4ax.com>
Message-ID: <6b2dnS9lM559YpzdRVn-ig@comcast.com>

Denis Sarrazin wrote:
> Try 1.0/2 instead of 1/2. Note that when I do eval("1/2") I get 0 not
> 0.5

Please note: "from __future__ import division", see PEP 238 which 
changes the behavior of the divisino operator.

My results with Python 2.3.3:

 >>> from __future__ import division
 >>> eval('1/2')
0.5
 >>> input()
1/2
0
 >>> eval(raw_input())
1/2
0.5

> 
> -Denis
> 
> Le Sun, 11 Jan 2004 23:45:48 +0000, Tim Rowe
> <tim at remove_if_not_spam.digitig.co.uk> a ?crit :
> 
> 
>>If I do from __future__ import division then eval(1/2) gives me 0.5 as
>>expected. But if I do print input("enter a sum: ") and enter 1/2 as
>>the sum I get 0 as if I hadn't done the import.  I thought input was
>>supposed to give the same behaviour as an eval on raw input -- why the
>>difference here?
> 
> 



From no.spam at no.spam.com  Mon Jan  5 09:37:47 2004
From: no.spam at no.spam.com (Maciej Sobczak)
Date: Mon, 05 Jan 2004 15:37:47 +0100
Subject: Multiple interpreters in a single process
Message-ID: <btbso8$etl$1@atlantis.news.tpi.pl>

Hi,

I'm interested in embedding the Python interpreter in a C++ application.
What I miss is the possibility to create many different interpreters, so 
that the stuff that is running in one interpreter does not influence the 
other. In essence, the interpreter can be used in different modules of a 
single application. It would be nice to isolate them.

There are two possibilities:

1. The interpreters need to run in paraller (from different threads of 
the master application). Definitely, separate interpreters are needed.

2. Different modules use a single Python interpreter in non-overlapping 
times. At least the possibility to clean up the interpreter is needed.

Is this problem easy to solve? Or maybe are there alternative approaches 
(switchable dictionaries, etc.)?

Thank you very much,

-- 
Maciej Sobczak : http://www.msobczak.com/
Programming    : http://www.msobczak.com/prog/



From rmangaliag at slu.edu.ph  Fri Jan 30 03:59:30 2004
From: rmangaliag at slu.edu.ph (ali)
Date: Fri, 30 Jan 2004 16:59:30 +0800
Subject: what is the use of weakref?
Message-ID: <1jipe1-fqq.ln1@news.slu.edu.ph>

i've seen a lot of times in programs but until now i still dont know the use
of the weakref module... any help will be appreciated... thanks...

ali




From jcb at iteris.com  Fri Jan 16 02:06:44 2004
From: jcb at iteris.com (MetalOne)
Date: 15 Jan 2004 23:06:44 -0800
Subject: data structures module
Message-ID: <92c59a2c.0401152306.1c6a17f5@posting.google.com>

I am fairly new to Python.
Today, I wanted a priority queue.
I notice that Python does not have any sorted lists.
I know that I can call list.sort(), but that seems rather inefficient
to call every time an element is added.
I am wondering why there is not a module or modules containing many
common data structures.  Has such a thing been decided against?  Is it
that just nobody has done it?  Has nobody else suggested the need for
it?  Maybe I should search, but I am too tired now, I need sleep.


From roberson at ibd.nrc-cnrc.gc.ca  Mon Jan 26 13:32:42 2004
From: roberson at ibd.nrc-cnrc.gc.ca (Walter Roberson)
Date: 26 Jan 2004 18:32:42 GMT
Subject: perl bug File::Basename and Perl's nature
References: <7fe97cc4.0401242131.22acf485@posting.google.com>
	<40136b6d@news.victoria.tc.ca>
	<7fe97cc4.0401260943.2442ba4e@posting.google.com>
Message-ID: <bv3mga$leu$1@canopus.cc.umanitoba.ca>

In article <7fe97cc4.0401260943.2442ba4e at posting.google.com>,
Xah Lee <xah at xahlee.org> wrote:
:* when it gets one to think about design, File::Basename is one
:fucking turd. The suffix list should not be regex in the first fucking
:place. (it shouldn't even require a suffix list by default). The need
:to feed it OS type (fileparse_set_fstype($os)) is fucking defeating
:the main point of using this module.

You don't -need- to feed it the OS type: it defaults to using
the information from the currently running OS ($^O). The
fileparse_set_fstype is there so that one can write routines targetted
at specific OSes. For example, one could import a VMS log file onto
a Unix system and parse it there without having to roll one's own
filename parsing routines.

:The suffix list should not be regex in the first fucking
:place.

Why not? Anyone who read the documentation would see immediately that
regexes were called for in that position. Perhaps -you- don't need
the flexibility of having regexes there, but is that any reason to
deny other people the flexibility?

:it shouldn't even require a suffix list by default

It doesn't. If you don't pass it a suffix list, then that will be
treated as the empty array, and suffixes will not be broken out.

Are you perhaps saying that on Unix systems, it should default to
using '\.[^.]*$' as the suffix list, thus breaking out from the
last period onwards?
-- 
   Beware of bugs in the above code; I have only proved it correct,
   not tried it.                             -- Donald Knuth


From wichert at wiggy.net  Thu Jan 22 09:16:28 2004
From: wichert at wiggy.net (Wichert Akkerman)
Date: Thu, 22 Jan 2004 15:16:28 +0100
Subject: utf8 encoding problem
In-Reply-To: <Pine.LNX.4.44L.0401221640010.31484-100000@ods.pravda.rfn.ru>
References: <20040122103549.GA5620@wiggy.net>
	<Pine.LNX.4.44L.0401221640010.31484-100000@ods.pravda.rfn.ru>
Message-ID: <20040122141628.GJ7377@wiggy.net>

Previously Denis S. Otkidach wrote:
> You have to pass 8-bit string, but not unicode.  The following
> code works as expected:
> 
> >>> urllib.unquote('t%C3%A9st').decode('utf-8')
> u't\xe9st'

Ah, that does work indeed, thanks.

> P.S. According to HTML standard, with
> application/x-www-form-urlencoded content type form data are
> resricted to ASCII codes:
> http://www.w3.org/TR/html4/interact/forms.html#form-data-set
> http://www.w3.org/TR/html4/interact/forms.html#submit-format

Luckily that is not true, otherwise it would be completely impossible to
have websites using non-ascii input. To be specific, the encoding used
for HTML forms is determined by:

1. accept-charset attribute of the form element if present. This is
   not handled by all browsers though.
2. the encoding used for the html page containing the form
3. ascii otherwise

this is specified in section 17.3 of the HTML 4.01 standard you are
referring to. 

Wichert.

-- 
Wichert Akkerman <wichert at wiggy.net>    It is simple to make things.
http://www.wiggy.net/                   It is hard to make things simple.




From tjreedy at udel.edu  Fri Jan  9 23:03:00 2004
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 9 Jan 2004 23:03:00 -0500
Subject: Python is far from a top performer according to benchmark
	test...
References: <ryELb.238$tK2.228@amstwist00> <btn5db$2f8$1@absinth.dialog.net.pl>
Message-ID: <J6KdnbYE24L25GKiRVn-hw@comcast.com>


"Krzysztof Stachlewski" <stach at fr.USUN.pl> wrote in message
news:btn5db$2f8$1 at absinth.dialog.net.pl...
> "Carl" <phleum_nospam at chello.se> wrote in message
> news:ryELb.238$tK2.228 at amstwist00...
> With "heavy use of Numeric module" you were calling functions
> written in C. So how can you say that Python is fast,
> when C code is doing all the work.

Well gee.  *All* of the functions exposed in builtins *and* in built-in
modules are also written in C.  So are all the methods of builtin types and
all the hidden functions (some exposed in the C API), including the
compilation and interpretation.  So how can anyone even talk about the
speed of Python, when C code is doing all the work, whether quickly or
slowly!

[and in another post]
>I just think that the Numeric package is not the best example
> of the speed of Python itself.

But what is 'Python' itself?  I think you are making a false distinction.
Numerical Python and other scientific code driving C and Fortran functions
was a, if not the killer app for Python when I learned it about 7 years
ago.  It was so important to the early success of Python, such as it was,
that the slice object was added just for its use.

Terry J. Reedy





From engsolnom at ipns.com  Mon Jan  5 20:41:02 2004
From: engsolnom at ipns.com (engsolnom at ipns.com)
Date: Mon, 05 Jan 2004 17:41:02 -0800
Subject: Quck question
References: <3125790e.0401051610.5e24de28@posting.google.com>
Message-ID: <534kvvgceuqteq41ta3n2qug588ihmlvm8@4ax.com>

On 5 Jan 2004 16:10:21 -0800, sinzcere at hotmail.com (J) wrote:

>I have the following information in a file :
>r1kcch    Serial0/0/0    propPointToPointSerial
>Mon Jan 5 13:15:03 PST 2004 InOctets.1    0
>Mon Jan 5 13:15:05 PST 2004 OutOctets.1   0
>
>I want to be able to extract each line into a comma delimited list. 
>Bellow i am trying to print out my list print currentList but nothing
>is comming out.  I added a line after print test to make sure the file
>has the information.  Can someone help me with this?
>
>
>#Read a file
>true = 1
>in_file = open("test.txt","r")
>text = in_file.read()
>while true:
>    in_line = in_file.readline()
>    if in_line == "":
>        break
>    currentList = string.split(in_line,",")
>    #print out the contents of the current list
>    print currentList 
>    #make the inline stop reading
>    in_line = in_line[:-1]
>in_file.close()


Here's an alternate way....

fd_in = open('myfiles/test_text.txt', 'r')
each_line = ''
a_list = []

for line in fd_in.readlines():
    for word in line.split():
        each_line += word + ','
        a_list.append(word)        # If a real list is desired
    print each_line                    # Keep the trailing comma
    print each_line.rstrip(',')       # Delete the trailing comma
    each_line = ''                      # Ready for the next line

    #a_list = []                          # Clear the list if one line per
                                              # list is desired

print a_list                              # Otherwise the whole file is
                                              # contained in the list

fd_in.close()


Prints:

This,is,line,one,
This,is,line,one
This,is,line,two,
This,is,line,two
This,is,line,three,
This,is,line,three
This,is,line,four,
This,is,line,four
This,is,line,five,
This,is,line,five
This,is,line,six,
This,is,line,six

['This', 'is', 'line', 'one', 'This', 'is', 'line', 'two', 'This', 'is',...]

Several concepts are embedded, if that's a confusion, I apologize.
Of course, you can write to an output file in lieu of the prints.

Norm
 (just a newbie)



From roberson at ibd.nrc-cnrc.gc.ca  Sun Jan 25 01:18:50 2004
From: roberson at ibd.nrc-cnrc.gc.ca (Walter Roberson)
Date: 25 Jan 2004 06:18:50 GMT
Subject: perl bug File::Basename and Perl's nature
References: <7fe97cc4.0401242131.22acf485@posting.google.com>
Message-ID: <buvn4a$rnt$1@canopus.cc.umanitoba.ca>

In article <7fe97cc4.0401242131.22acf485 at posting.google.com>,
Xah Lee <xah at xahlee.org> wrote:
:the crime in question this time is the module File::Basename.

:1. create a directory containing a file of this name: "cdrom.html".
:2. "use File::Basename;", with the line:
:   ($name,$path,$suffix) = fileparse($File::Find::name, ('.html',
:'.m'));
:3. Notice that your cdrom.html will be parsed into "cdr" with suffix
:"om.html".

:Now, if you peruse the "documentation" of "perldoc File::Basename",
:you'll see that it shouldn't be so.

The program did what it was documented to do.

: The
: remainder of the input file specification is then
: divided into name and suffix based on the
: optional patterns you specify in
: @suffixlist. Each element of this list can be a
: qr-quoted pattern (or a string which is
: interpreted as a regular expression), and is
: matched against the end of name. If this
: succeeds, the matching portion of name is removed
: and prepended to suffix.

So the suffixlist is a set of *patterns*. And '.m' is a *pattern*
that means "any character followed by the character 'm'.

Probably what you wanted to code was:

($name,$path,$suffix) = fileparse($File::Find::name, ('\.html', '\.m'));


: Here is a better documentation for the fileparse subroutine.

Your "better" documentation does not describe how the directory string
is derived.


:Not every morons in this world is using unix with its morinic
:convention of appending things to file names as a versioning system,

There is no widespread unix convention of appending things to
file names as a versioning system. The convention of appending
a version was probably most common in VMS, which used filenames
of the form  $device:[directory.directory]filename.filetype;version
such as $DISK0:[ROBERSON.SOURCE]HELLO.C;17

The use of extension information was present in CPM (1973) -- borrowed
from VMS. CPM begat QDOS which begat DOS which begat Windows.

The VMS structure of filename.filetype;version was adopted as the
ISO9660 filesystem for CDROMs. You don't *see* that because there
are common extensions to provide filename mapping, but every
ISO standard CDROM filesystem uses that structure underneath.
Including the common Rockridge extensions, and including when you
put a Joilet filesystem on a CDROM.
-- 
   Come to think of it, there are already a million monkeys on a million
   typewriters, and Usenet is NOTHING like Shakespeare.  -- Blair Houghton.


From pythonlist at dan-gottlieb.com  Sun Jan 25 13:29:43 2004
From: pythonlist at dan-gottlieb.com (Dan Gottlieb)
Date: Sun, 25 Jan 2004 13:29:43 -0500
Subject: Mod_python on Windows Troubles
Message-ID: <009101c3e371$37325180$6401a8c0@X1000>

Hi,

I realize that this is somewhat vague, but I'm not really sure what to
do next.  I'm trying to get Apache and mod_python set up on my windows
XP box for testing purposes.  I installed the Apache 2.0.48 windows
binaries using the Apache installer, tested it and it worked fine.  I
then installed the mod_python 3.0.4 windows binaries using the installer
which correctly found my ActiveState Python 2.2 installation and the
aforementioned Apache installation.  I tested Apache again, and it
loaded fine.  However, when I add the line "LoadModule python_module
modules/mod_python.so" to httpd.conf, the Apache service refuses to
start with the following error: "Cannot load C:/Program Files/Apache
Group/Apache2/modules/mod_python.so into server: The specified module
could not be found."  Any help would be greatly appreciated.

Regards,
Dan





From francisgavila at yahoo.com  Thu Jan 22 00:47:10 2004
From: francisgavila at yahoo.com (Francis Avila)
Date: Thu, 22 Jan 2004 00:47:10 -0500
Subject: python said : "1, 2, 3, 6, 7, manbo !"
References: <pan.2004.01.21.20.53.18.750567@address.com>
	<400F3D90.2176087B@alcyone.com>
Message-ID: <100up1eosgqun2a@corp.supernews.com>


Erik Max Francis wrote in message <400F3D90.2176087B at alcyone.com>...
>- wrote:
>
>> Why 5 does not appear ? (this was the source of a deep bug in a 4000+
>> lines networked program...)
>
>You are iterating over a mutable sequence while you are mutating it. 
>That is a big no-no.
>

Try this instead:

a = [i for i in range(8) if not i == 4]
-- 
Francis Avila


From akhavr at kds.com.ua  Mon Jan 12 13:03:47 2004
From: akhavr at kds.com.ua (Andrey Khavryuchenko)
Date: Mon, 12 Jan 2004 20:03:47 +0200
Subject: script to translate from compiler AST
References: <m3d69qk10i.fsf@netmaster.kds.com.ua>
	<4f0a9fdb.0401120037.13686194@posting.google.com>
Message-ID: <m3smilhwn0.fsf@netmaster.kds.com.ua>

Miki,

"MT" == Miki Tebeka wrote:

 MT> Have you looked at the parser module?
 MT> (http://www.python.org/doc/current/lib/module-parser.html) it does
 MT> have some functions operating on AST. The is also a visitor patter
 MT> support in the compiler module.

Well, I'm speaking exactly about the compiler module.  Imagine, I've built
an AST that I want to run.  I've not found an easy (read library) way to do
that, hence the questions.

-- 
Andrey V Khavryuchenko            http://www.kds.com.ua/
Silver Bullet Software Solutions  http://www.kds.com.ua/training/


From jsbenson at bensonsystems.com  Wed Jan 14 15:28:26 2004
From: jsbenson at bensonsystems.com (John Benson)
Date: Wed, 14 Jan 2004 12:28:26 -0800
Subject: CCPL: a new software stealth license
Message-ID: <020301c3dadc$f7147840$8d09500a@jsbwxp3>

Regarding the following post: Once Groucho Marx said something really funny,
and someone asked him "Is that original?" His reply: "It was once..."

I hereby place the below-quoted code fragment under the CCPL (Cheshire Cat
Public License). You are permitted to use the code covered by this license
for any purpose whatsoever as long as you don't include the CCPL and
copyright (which shouldn't be too hard, because they have been encrypted and
shredded to facilitate compliance, plus I'm going to neuralyze myself
now...).

What was this post about?

Message: 4
Date: Tue, 13 Jan 2004 20:32:38 -0700
From: "Dave Murray" <dlmurray at micro-net.com>
Subject: Re: I come not to bury C++, but to praise it...
To: python-list at python.org
Message-ID: <1009e0uldj5eq29 at corp.supernews.com>

> sprintf("All the cool guys use %s because %s\n", Myfavoritelanguages,
> Mylimitedexperience)

Very good! I hope that that's not under copyright, I plan to use it.

Dave







From mtadin66 at yahoo.com  Sun Jan 18 23:45:48 2004
From: mtadin66 at yahoo.com (Marijan Tadin)
Date: Mon, 19 Jan 2004 05:45:48 +0100
Subject: Searching for UTF8 capable font for REPORTLAB
References: <mailman.429.1074256100.12720.python-list@python.org>
Message-ID: <bufqjv$3e8$1@ls219.htnet.hr>

Try following code, replace value of my_location_of_TTF with your
location of TTF (of course you should have TT fonts somewhere on your
machine, on windows they are allways there, AFAIK you can download them
for linux):

There is also mailing list on ReportLabs website, it is where I found
the hint how to use ReportLab and Unicode.


from reportlab.pdfgen import canvas
from reportlab.pdfbase import pdfmetrics
from reportlab.pdfbase.ttfonts import TTFont

canv = canvas.Canvas('test_03.pdf')
fontname = 'CS'

my_location_of_TTF = 'C:\WINNT\FONTS\comic.TTF'

pdfmetrics.registerFont(TTFont(fontname,my_location_of_TTF))
a=u'\u010d\u0107\u017e\u0161\u0111\u010c\u0106\u017d\u0160\u0110'
canv.setFont(fontname,10)
canv.drawString(50,100,'Some text:'+a.encode('UTF8'))
canv.save()


"Andreas Jung" <lists at andreas-jung.com> wrote in message
news:mailman.429.1074256100.12720.python-list at python.org...
> Reportlab has some problems with creating PDFs from UTF8 encoded text.
For
> this reason
> they are using a truetype font rina.ttf which looks *very ugly*. Does
> anyone know of a
> suitable free available truetype font that works with UTF8?
>
> -aj
>
>



From newsgroups at jhrothjr.com  Sun Jan  4 20:28:04 2004
From: newsgroups at jhrothjr.com (John Roth)
Date: Sun, 4 Jan 2004 20:28:04 -0500
Subject: Creating a capabilities-based restricted execution system
References: <LmmdnUn4seDeGWuiXTWc-w@speakeasy.net>
	<vveg0bb6is2f60@news.supernews.com> <bt7lbp$ovg$1@panix2.panix.com>
	<vveohcpod4oje0@news.supernews.com> <bt82d7$ort$1@panix3.panix.com>
	<vvg0h93ue63c0b@news.supernews.com> <bta2ng$16v7$1@nadya.doma>
	<vvh75ienj7g244@news.supernews.com> <btac4k$1ekr$1@nadya.doma>
Message-ID: <vvhffh8km2a5ab@news.supernews.com>


"Serge Orlov" <sombDELETE at pobox.ru> wrote in message
news:btac4k$1ekr$1 at nadya.doma...
>
> "John Roth" <newsgroups at jhrothjr.com> wrote in message
news:vvh75ienj7g244 at news.supernews.com...
> >
> > "Serge Orlov" <sombDELETE at pobox.ru> wrote in message
> > news:bta2ng$16v7$1 at nadya.doma...
> > >
> > > "John Roth" <newsgroups at jhrothjr.com> wrote in message
> > news:vvg0h93ue63c0b at news.supernews.com...
> > > >
> > > > One problem I've been playing around with is: how would you
> > > > implement something functionally equivalent to the Unix/Linux
> > > > chroot() facility? The boundaries are that it should not require
> > > > coding changes to the application that is being restricted, and it
> > > > should allow any and all Python extension (not C language
> > > > extension) to operate as coded (at least as long as they don't
> > > > try to escape the jail!) Oh, yes. It has to work on Windows,
> > > > so it's not a legitimate response to say: "use chroot()."
> > >
> > > I don't see any unsolvable problems. Could you be more specific
> > > what is the problem? (besides time, money, need to support
> > > alternative python implementation, etc...)
> >
> > Well, I don't see any unsolvable problems either. The biggest
> > sticking point is that the Unices use hard links to create
> > a directory tree that has the necessary programs availible.
> > Windows does not have this capability, so an implementation
> > would have to build a virtual directory structure, intercept all
> > paths and map them to the virtual structure backwards and
> > forwards.
> >
> > The reason I find it an interesting problem is that I can't see
> > any way to do it with the kind of "generic" facility that was
> > in the Python Restricted execution facility,  at least without a
> > complete redesign of the file and directory functions and
> > classes in the os module. Without that, it would
> > require code in the C language implementation modules.
> > Right now the file and directory management modules are a
> > real mess.
>
> Right, you can do it with a custom importer and wrapper
> functions over all file and directory functions. But that's
> a mess over a mess and any mess is *bad* for security.
> The way out the mess is probably filepath object that
> should consolidate all access to files and directories.
> If you wanted to make a point that std library should
> be designed with security in mind I agree with you.
> One step in that direction is to design everything OO.
> OO design plays nice with capabilities.
>
> -- Serge.

Sean Ross took a pass at this idea in the thread
"Finding File Size" starting on 1/1. That got renamed
to "Filename Type" somewhere fairly quick.

There's now a pre-pep  http://tinyurl.com/2578q
for the notion, thanks to Gerrit Holl.

John Roth
>
>




From dietrich at zdome.net  Mon Jan 26 01:04:07 2004
From: dietrich at zdome.net (Dietrich Epp)
Date: Sun, 25 Jan 2004 22:04:07 -0800
Subject: [OPINION] - does language really matter if they
	alldothe	samething?
In-Reply-To: <bv1t4e$2fh$1@sea.gmane.org>
References: <69A0D4AB81C51447AD6BA387782B8D64093D8A@midl-mail4.etcconnect.com><028FD9F0-4E01-11D8-BB78-0003934ACDEC@zdome.net><4011C497.1040302@prescod.net><58587302-4E30-11D8-8FAB-0003934ACDEC@zdome.net><buua42$vop$1@sea.gmane.org>
	<D3AD8358-4F90-11D8-BCE5-0003934ACDEC@zdome.net>
	<bv1t4e$2fh$1@sea.gmane.org>
Message-ID: <73BCD13A-4FC5-11D8-804D-0003934ACDEC@zdome.net>

On Jan 25, 2004, at 6:13 PM, Terry Reedy wrote:

> I assume that in your code, the same recursion base-casing is hidden 
> within
> the no-source-given choose-random-assoc macro, by how it rewrites the 
> text
> of its 'arguments'.  I suspect that if choose-random-assoc were an
> ordinarily lisp function, including in CL, with arguments evaluated 
> before
> the call, then random_sword_magic_power() would have to explicitly
> conditionalize its recursive call, just as in other languages.  If so, 
> then
> one very much does have to know that c-r-a is a macro in order to use 
> it
> efficiently and not write a redundant base-case check.

Yah, it is hidden, or as I would put it, abstracted away.  It's stuff I 
don't need to look at or know any more.  The 'and' solution wouldn't in 
the following:

(defun some-beverages ()
   (choose-random
     (5 '(water))
     (2 '(milk))
     (3 '(orange-juice))
     (5 (append (some-beverages) (some-beverages)))))

This is a bit closer, as I can't recall any recursive function I've 
written where the recursion can be excluded before we know which item 
'choose-random' selected.  Copying and pasting the above into clisp 
(after loading choose-random) yields results like:

(orange-juice)
(milk orange-juice)
(water water)

I strongly disagree with the statement that I need to know that 
'choose-random' is a macro.  In Python, I don't need to know that 
'lambda' creates a 'closure'.  All I need to know is how to use it.  I 
didn't give the source for 'choose-random' because I don't think it 
necessary, and besides, it's the first macro I ever wrote -- so it's 
poorly written (but I don't care as long as it works).  If I were to 
rewrite it, I would eliminate a level of parentheses.  By the way, I 
would NOT touch the parentheses issue with a ten-plus-one foot pole, 
ESPECIALLY on a Python list.

In Lisp, you could (and often do) use things that are macros and never 
know.  Such as the following:

(defun abs (x) (cond ((> x 0) x) (T (- x))))

Can you spot the macro?  There are anywhere from zero to two or more 
macros, depending on implementation.  'cond' will sometimes turn itself 
into a bunch of 'if' expressions (sometimes vice versa), and 'defun' 
often turns into a 'define' and a 'lambda', sometimes more (such as if 
the function has a docstring).  So if I wanted to use 'choose-random' 
would knowing that it's a macro help?  No.  What I need to know is that 
it takes pairs of probabilities and values and randomly evaluates one 
of the values.  A clarification probably says that it's safe to recurse 
inside 'choose-random'.  If I were new to Lisp, I would say, "Huh, 
cool.  Wonder how they did that?"  If I were experienced, I would 
think, "Oh, it's a macro."  But either way it's not really important.

P.S. In some flavors of Lisp, choose-random would be an ordinary 
function.  This includes a toy version that I wrote in Python, no less.

P.P.S. I thought of a paradigm that would be exceptionally painful to 
implement in Python.  It's a function found in some flavors of Lisp 
called 'arb'.  It returns its argument which causes the program to exit 
successfully, otherwise causes the program to exit unsuccessfully.  
Think about that.




From jim.vickroy at noaa.gov  Tue Jan 27 17:33:15 2004
From: jim.vickroy at noaa.gov (j vickroy)
Date: Tue, 27 Jan 2004 15:33:15 -0700
Subject: map float string '0.0' puzzle
Message-ID: <bv6ovb$c2q$1@boulder.noaa.gov>

Howdy,

I do not understand the following behavior for:
PythonWin 2.3.2 (#49, Oct  2 2003, 20:02:00) [MSC v.1200 32 bit (Intel)] on
win32.

>>>
>>> float('0.0')
0.0
>>> row = ('0.0', '1.0', None)
>>> map(lambda setting: setting and float(setting) or None, row)
[None, 1.0, None]
>>> map(lambda setting: setting and (setting,float(setting)) or
(setting,None), row)
[('0.0', 0.0), ('1.0', 1.0), (None, None)]
>>>

Specifically, why is the return value of the first map operation:
[None, 1.0, None]

I was expecting:
[0.0, 1.0, None]


Thanks in advance for the help.




From petrilaakso at otapois.kolumbus.fi  Sun Jan 11 07:24:16 2004
From: petrilaakso at otapois.kolumbus.fi (Petri Laakso)
Date: Sun, 11 Jan 2004 12:24:16 +0000 (UTC)
Subject: wxPython Application over the net
References: <1d17eeb7.0401091838.3eef2093@posting.google.com>
Message-ID: <btrf9g$2am$1@phys-news1.kolumbus.fi>

On 9 Jan 2004 18:38:08 -0800
dj00302003 at yahoo.com (Jay Davis) wrote:

> We have an application in wxPython that works quite well on 
> our local computers, but we want people to be able to run
> the program over the internet.  One way that would work
> is to use an Xwindows server and just have people connect
> to the program on our local host, but we would like to work
> in an internet browser because not everyone has an Xserver.
> 
> Is there any reasonable way to run a wxPython app inside 
> a browser?

How about Java VNC client which connects to vncserver?
It's easy to run networked programs on that.
I've used for a while nicotine (soulseek-like program) over
network

Petri


From jjl at pobox.com  Fri Jan 16 10:59:39 2004
From: jjl at pobox.com (John J. Lee)
Date: 16 Jan 2004 15:59:39 +0000
Subject: I come not to bury C++, but to praise it...
References: <mailman.337.1074032524.12720.python-list@python.org>
	<bu1uul$cam92$1@ID-46268.news.uni-berlin.de>
	<cu%Mb.47396$8H.99443@attbi_s03>
	<bu3khe$dbm5v$1@ID-46268.news.uni-berlin.de>
	<mailman.356.1074094662.12720.python-list@python.org>
	<bu408b$d67fm$1@ID-46268.news.uni-berlin.de>
	<87ad4qrmut.fsf@pobox.com>
	<bu6ako$e61sb$1@ID-46268.news.uni-berlin.de>
Message-ID: <87vfnbzxxw.fsf@pobox.com>

"Derek" <none at none.com> writes:

> "John J. Lee" wrote...
> > [...]
> > > Maybe I didn't make myself clear.  I counted the ease
> > > with which memory can be corrupted in C++ as a minus for
> > > C++ and a plus for Python.  I agree with you.
> >
> > No, you don't (assuming I understand Jp's post), because...
> >
> > > On the flip side, C++ can catch errors immediately that
> > > Python will not complain about until runtime, and in this
> > > imperfect world tests may not catch all such errors up
> > > front.  In this respect I consider C++ safer.
> >
> > ...you made no evaluation of the relative importance of
> > these two qualities (memory-safety and static type-safety).
> > Nor of the fact that C++ comes unavoidably packaged with the
> > more-lines-of-code-per-function-point anti-feature -- KIS!
> 
> Are you joking?

No.


> Because if you have some magical way to assign a
> meaningful relative importance to unrelated language features that is
> sufficiently general to be useful, I'd like to hear it.

(No funny business here, just straightforwardly trying to answer your
question to advance the debate:) Well, yes, I do: I think about it
rationally, just as you do.  I think about the "unrelated" language
features (though I suppose few language features are truly unrelated),
consider their impact on things like detection and location of bugs,
and make a judgement about how they, as a result, affect the success
and costs of the development process.

I'm afraid I'm probably completely missing what you're getting at
here, though!  (again, not trying to make any rhetorical point, just
puzzled)

For the particular issues at hand, Jp made an evaluation that looked
quite rational to me, as do your comments immediately below.


> For *me* memory safety in C++ is not an issue.  I use range-checked
> containers, scoped pointers, shared pointers, etc. and don't encounter
> memory management/safety problems.

Oh.  That's interesting.  Do those practices get rid of all such
issues?


> For *me* the lack of static type safety in Python is an issue.  We

Yes, many people -- including me! -- agree on this, I think (but not
everyone -- see the quote from Alex Martelli in my reply to Andrew
Koenig).  The question is one of the relative sizes of the various
costs and benefits, and of the way those costs and benefits are tied
to each other in current languages.  If only we could pick language
properties a la carte...


> have a lot of developers working on a relatively large Python
> codebase, and sooner or later some edge case calls a function with an
> argument who's type makes no sense.  Sometimes tests catch the problem
> early, sometimes they don't.

I think we've been round this loop already.  Schematically, though:
Static typechecking tests reliably for a small set of bugs.  Unit
testing tests unreliably for a very large set of bugs.  No controversy
so far, I hope.  Now, the bugs found by unit testing are in practice
almost a simple superset of those found by static typechecking
(clearly, this point can generate much debate!).  C++ buys you static
typechecking (gain: a small number of bugs found that your unit tests
miss), but also buys you a big jump in lines of code (loss: many extra
bugs created (amongst other losses)).  I don't argue that this is a
fundamental limitation of static typechecking, or that Python is the
best of all possible worlds.  I do claim that Python achieves a net
gain in safety over C++ by dropping the naive static checking found in
C++.


John


From jsbenson at bensonsystems.com  Wed Jan 14 15:46:44 2004
From: jsbenson at bensonsystems.com (John Benson)
Date: Wed, 14 Jan 2004 12:46:44 -0800
Subject: parsing c-code
Message-ID: <021a01c3dadf$85ddbe90$8d09500a@jsbwxp3>

I'm currently making my way through Thomas Christopher's Python Programming
Patterns which describes an LL(k) parser generator that might be of help. I
know there are other Python parsing tools out there as well, per Chapter 15
of the Python Cookbook.

Message: 4
Date: Wed, 14 Jan 2004 09:27:55 +0100
From: "tm" <js.bach at web.de>
Subject: Parsing c-code
To: python-list at python.org
Message-ID: <bu2uoj$8pc$1 at piggy.rz.tu-ilmenau.de>

Hello,

are there recommended modules for parsing c-code.
I want to read in c-structs and display it in a tree graphic.

--
Torsten









From maketo at norge.freeshell.org  Wed Jan 14 14:17:55 2004
From: maketo at norge.freeshell.org (Ognen Duzlevski)
Date: Wed, 14 Jan 2004 19:17:55 +0000 (UTC)
Subject: Numeric Python and C
Message-ID: <bu44l3$jvv$1@chessie.cirr.com>

Hi,
can someone explain how to change a value within an array from a C function?

For example, I have the following array:

scoremat = zeros((10,10))

and the following C function:

PyObject *DynAlign(PyObject *self, PyObject *args)
{	
	PyArrayObject *p;
	int ok;

	/* get the array */
	ok = PyArg_ParseTuple(args,"O!", &PyArray_Type, &p);
	/* this gets a value p[5][5] */
	v55 = *(double *)p->data + 5*p->strides[0] + 5*p->strides[1]);
}

How to I change the value at p[5][5] and retain it in the same array after function exit?

So, from Python I might have:

from Numeric import *

scoremat = zeros((10,10))
DynAlign(scoremat)
print scoremat[5][5]

Thank you,
Ognen


From its1louder at yahoo.com  Tue Jan 20 21:03:36 2004
From: its1louder at yahoo.com (Tom)
Date: 20 Jan 2004 18:03:36 -0800
Subject: Help, *.CHM, etc
Message-ID: <90f2d9db.0401201803.6f2adbf8@posting.google.com>

A question for gui application programmers. . . 
I 've got some GUI programs, written in Python/wxPython, and I've got
a help button and a help menu item.  Also, I've got a compiled file
made with the microsoft HTML workshop utility, lets call it
c:\path\help.chm.  My question is how do you launch it from the GUI? 
What logic do I put behind the "help" button, in other words.

I thought it would be

os.spawnv(os.P_DETACH, "c:\\path\\help.chm", [])

but I get an error:

OSError: [Errno 8]  Exec format error

so I guess help.chm isn't executable itself, but is associated with
some unknown executable.  I tried explorer.exe- at the dos cmd line it
basically works to type

explorer.exe c:\path\help.chm

although there is a nag screen that would be nice to do without.

so you'd think 

os.spawnv(os.P_DETACH, 'explorer.exe', ["c:\\path\\help.chm"])

would be equivalent but it fails.  I have to believe someone out there
in python community likes to include help.chm with their applications,
nad there is a right way to do this.

On another note, are there pure python based help viewers that people
use instead?  The reason I ask is that would be more portable then the
*.chm files are.  If there is such a beast I can't find it.


From aahz at pythoncraft.com  Fri Jan 30 12:22:54 2004
From: aahz at pythoncraft.com (Aahz)
Date: 30 Jan 2004 12:22:54 -0500
Subject: Safe to modify globals(), or not?
References: <6714766d.0401291559.45413e0d@posting.google.com>
	<bvcdt1$8t4$1@panix3.panix.com> <bvd6hm$9h1$03$1@news.t-online.com>
Message-ID: <bve3te$fk9$1@panix2.panix.com>

In article <bvd6hm$9h1$03$1 at news.t-online.com>,
Peter Otten  <__peter__ at web.de> wrote:
>Aahz wrote:
>>
>> import __main__
>> tmp = parse_funky_language("Hey, this is far out, man.")
>> setattr(__main__, tmp.name, tmp.value)
>> 
>> In the context of the interactive interpreter, it's a bit harder to do;
>> I don't remember off-hand what the namespace of the interpreter is.
>
>You don't need to :-)
>
>Python 2.3.3 (#1, Jan  3 2004, 13:57:08)
>[GCC 3.2] on linux2
>Type "help", "copyright", "credits" or "license" for more information.
>>>> __name__
>'__main__'

Yes, but how do you access that from a module?
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

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


From gerrit at nl.linux.org  Sun Jan  4 03:34:48 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Sun, 4 Jan 2004 09:34:48 +0100
Subject: datetime string to datetime object converter
In-Reply-To: <MnIJb.33778$xU1.16252@fe1.texas.rr.com>
References: <MnIJb.33778$xU1.16252@fe1.texas.rr.com>
Message-ID: <20040104083448.GA13987@nl.linux.org>

Randall Smith wrote:
> Is there an existing module or script that can convert a datetime string 
> of unknown format to a python datetime object ?

You are probably looking for DateUtil :
https://moin.conectiva.com.br/DateUtil

yours,
Gerrit.

-- 
25. If fire break out in a house, and some one who comes to put it out
cast his eye upon the property of the owner of the house, and take the
property of the master of the house, he shall be thrown into that
self-same fire.
          -- 1780 BC, Hammurabi, Code of Law
-- 
Asperger's Syndrome - a personal approach:
	http://people.nl.linux.org/~gerrit/english/



From gerrit at nl.linux.org  Sun Jan 25 04:10:51 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Sun, 25 Jan 2004 10:10:51 +0100
Subject: perl bug File::Basename and Perl's nature
In-Reply-To: <7fe97cc4.0401242131.22acf485@posting.google.com>
References: <7fe97cc4.0401242131.22acf485@posting.google.com>
Message-ID: <20040125091051.GA14795@nl.linux.org>

> Just bumped into another irresponsibility in perl.

What's this doing in the Python newsgroup?

Gerrit.



From dk123456789 at REMOVEhotmail.com  Fri Jan 30 17:51:57 2004
From: dk123456789 at REMOVEhotmail.com (Dave K)
Date: Fri, 30 Jan 2004 23:51:57 +0100
Subject: conditional expression sought
References: <pRbSb.330334$ts4.37644@pd7tw3no>
	<mailman.1000.1075402284.12720.python-list@python.org>
	<P6iSb.334480$ts4.82507@pd7tw3no>
Message-ID: <ulnl10teov6ceq1q52laduq13d7u9edddd@4ax.com>

On Fri, 30 Jan 2004 01:06:55 GMT in comp.lang.python, "Elaine Jackson"
<elainejackson7355 at home.com> wrote:

>Sorry to take so long but I wasn't sure what a "unit test" was (the other guy's
>post clarified it). Tell me if this isn't what you're looking for:
>
>falsies=[0,0.0,[],(),{},'',None]
>truies=[49,3.14,[1,2,3],(4,5,6),{7:8,9:10},'nonempty']
>
>def demo(A,B):
>    print "If A is ",A
>    print "and B is ",B
>    print "then (A[0] and B[0]) or (A[1] and B[1]) or (A[2] and B[2]) = ",
>    print (A[0] and B[0]) or (A[1] and B[1]) or (A[2] and B[2])
>
>A=[]
>from random import randint
>for i in range(3):
>    A.append(bool(randint(0,1)))
>B=truies[0:3]
>demo(A,B)
>
>A=[False,False,False]
>B=falsies[0:3]
>demo(A,B)
>print "I would have liked this to be B[2] = ",B[2]
>
(snip)

Do you mean that the expression should return the last element in B if
all elements in A are false? If all subexpressions before the last are
false, the whole conditional reduces to:
    A[-1] and B[-1]

So simply force (a copy of) A[-1] to always be true. Instead of
rewriting demo, I'll cheat by modifying the call:

>>> A=[False, False, False]
>>> B=[0, 0.0, []]
>>> demo(A[:-1]+[True], B)
If A is  [False, False, True]
and B is  [0, 0.0, []]
then (A[0] and B[0]) or (A[1] and B[1]) or (A[2] and B[2]) =  []
>>> print A
[False, False, False]

For complete generality, you should also consider the case where
len(A) != len(B). Truncate the longer list, or extend the shorter?
Does it matter which list is shorter? Or forget the whole mess and
raise an exception? There are lots of reasonable possibilities, but
they won't all lead to the same result for certain input values.
You're in charge of this project, you decide :)

Dave


From newsgroups at jhrothjr.com  Fri Jan 23 14:43:58 2004
From: newsgroups at jhrothjr.com (John Roth)
Date: Fri, 23 Jan 2004 14:43:58 -0500
Subject: [OPINION] - does language really matter if they all do the
	samething?
References: <mailman.707.1074882690.12720.python-list@python.org>
Message-ID: <1012ue2jnpq8c5b@news.supernews.com>


"Python Baby" <python at hitmedia.com> wrote in message
news:mailman.707.1074882690.12720.python-list at python.org...
> Are programming languages like spoken languages, in the sense
> that they all say the same things, just using different words?
>
> Like many PHP people, I was never a "real" programmer, but just
> picked up PHP as my HTML websites started to mature.  Now that
> even my PHP sites have grown, (50,000 lines of PHP!), I got
> interested in object-oriented approach.  Since my old website
> needed an overhaul anyway, I thought it'd be a good time to learn.
>
> I start learning Ruby.  Then Python.  Wondering if, since I'm
> about to re-write my entire website anyway, if I should use
> Ruby or Python instead of PHP.
>
> As I've fretted over this for way too many hours, I started wondering:
>
> Can Ruby do something (important) that Python can't?
> Can Python do something (important) that PHP can't?
> Can PHP do something (important) that Ruby or Python can't?
>
> Are they all just the same, and it's just a matter of taste?
>
> Should I stick with PHP for the same reason that pop singers
> worldwide sing in English for maximum compatibility with the medium?
>
> Though PHP wasn't design for OOP should I use it that way anyway?
>
> Any opinions on the subject, from people that know and use many
> languages, would be appreciated.

In one sense, they all do the same thing, but that's a very trivial
sense. Different languages have different things they focus on,
so they make some things easier and some things harder.

Python tries to maintain a balance between clarity, ease of
learning, and usability. Of the major scripting languages, it's
probably the easiest to write maintainable code.

A lot of people think that Ruby's blocks and pervasive
use of the visitor pattern provide a very productive setting;
to me there's nothing there that Python can't do.

Both of them are object oriented from the ground up: if
being object oriented is important to you, PHP, Perl and
TCL aren't in the ball game. Their OO features are bolted
on afterthoughts. Some of them are quite nice afterthoughts,
but the kludge shows.

John Roth

>
>




From ramen at lackingtalent.com  Thu Jan  8 12:32:21 2004
From: ramen at lackingtalent.com (Dave Benjamin)
Date: Thu, 08 Jan 2004 17:32:21 -0000
Subject: Calling a function dynamically
References: <924a9f9c.0401080742.39eba581@posting.google.com>
	<btk1i4$ca4$02$1@news.t-online.com>
Message-ID: <slrnbvr5hb.seu.ramen@lackingtalent.com>

In article <btk1i4$ca4$02$1 at news.t-online.com>, Peter Otten wrote:
> Paradox wrote:
> 
>> I would like to call a function whose name I supply at runtime.
>> [snip]
> 
> Here's a way to abuse the [] operator (implemented by __getitem__()) to
> dynamically select a method...
> 
>>>> t["run"]("alpha", "beta", "gamma")
> run('alpha', 'beta', 'gamma')

I wouldn't necessarily consider this abuse. This behavior (where
square-bracket- and dot-syntax are functionally equivalent) is the normal
behavior of JavaScript, and it makes dynamic lookup of method names a snap.
Python is more flexible in giving you the option to have separate namespaces
for items and attributes, but if it makes more sense for an object to merge
the two, I see nothing wrong with it.

-- 
.:[ dave benjamin (ramenboy) -:- www.ramenfest.com -:- www.3dex.com ]:.
: d r i n k i n g   l i f e   o u t   o f   t h e   c o n t a i n e r :


From jepler at unpythonic.net  Fri Jan 16 15:02:52 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Fri, 16 Jan 2004 14:02:52 -0600
Subject: Suggested generator to add to threading module.
In-Reply-To: <40083eac$0$321$e4fe514c@news.xs4all.nl>
References: <7934d084.0401152058.164a240c@posting.google.com>
	<40083eac$0$321$e4fe514c@news.xs4all.nl>
Message-ID: <20040116200252.GF7659@unpythonic.net>

On Fri, Jan 16, 2004 at 08:42:36PM +0100, Ype Kingma wrote:
> > Found myself needing serialised access to a shared generator from
> > multiple threads.  Came up with the following
> > 
> > def serialise(gen):
> >   lock = threading.Lock()
> >   while 1:
> >     lock.acquire()
> >     try:
> >       next = gen.next()
> >     finally:
> >       lock.release()
> >     yield next
> 
> Is there any reason why the lock is not shared among threads?
> >From the looks of this, it doesn't synchronize anything
> between different threads. Am I missing something?

Yes, I think so.  You'd use the same "serialise" generator object in
multiple threads, like this:

p = seralise(producer_generator())
threads = [thread.start_new(worker_thread, (p,))
                for t in range(num_workers)]

Jeff



From jepler at unpythonic.net  Wed Jan 28 14:23:22 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Wed, 28 Jan 2004 13:23:22 -0600
Subject: How to detect that a key is being pressed,
	not HAS been pressed earlier!??
In-Reply-To: <6ed33425.0401281103.61987e72@posting.google.com>
References: <6ed33425.0401281103.61987e72@posting.google.com>
Message-ID: <20040128192321.GU18498@unpythonic.net>

In Tk, each event has a 'state' field, which can tell you whether
modifier keys or mouse buttons were pressed when an event was received.
Note that for the KeyPress event which is a modifier key, the state
field will not reflect the newly pressed key (the same goes for button
presses), as implied by this section of the XKeyEvent manpage:

       The state member is set to indicate the logical state of the pointer
       buttons and modifier keys just prior to the event, which is the bitwise
       inclusive OR of one or more of the button or modifier key masks: But-
       ton1Mask, Button2Mask, Button3Mask, Button4Mask, Button5Mask, Shift-
       Mask, LockMask, ControlMask, Mod1Mask, Mod2Mask, Mod3Mask, Mod4Mask,
       and Mod5Mask.

from Tkinter import *

# for pre-2.3 versions
#def enumerate(l):
#    for i in range(len(l)): yield i, l[i]

# Set up a mapping from bits to names
# (I'm not sure if these values match on Windows)
names = "Shift Caps Control Alt Num Mod3 Mod4 Mod5 1 2 3 4 5".split()
mods = [(1<<i, v) for i, v in enumerate(names)]

# Here's a handler that gets various events and looks at the state field
def setModifiers(event):
    s = []
    for i, v in mods:
        if event.state & i: s.append(v)
    if not s: s = ['(none)']
    var.set(" ".join(s))

# Set up a minimal user interface
t = Tk()
var = StringVar(t)
l = Label(t, textv = var, width=32)
l.pack()

# including a couple of bindings (the text will update when
# one of these bindings is triggered)
for binding in "<Motion> <1> <ButtonRelease-1>".split():
    l.bind(binding, setModifiers)
t.mainloop()

Jeff



From marco at bubke.de  Wed Jan 21 09:41:38 2004
From: marco at bubke.de (Marco Bubke)
Date: Wed, 21 Jan 2004 15:41:38 +0100
Subject: Numarray und NA_NewAll
Message-ID: <bum333$juh$1@graf.cs.uni-magdeburg.de>

Hi

If I understand the code right then there will be mset called if buffer is
NULL. Why? 

I want only a empty array, why not a malloc? The data section after that
will be overwritten by me. Maybe I'm wrong.



static PyArrayObject *
NA_NewAll(int ndim, maybelong *shape, NumarrayType type,
          void *buffer, maybelong byteoffset, maybelong bytestride,
          int byteorder, int aligned, int writeable)
{
        PyArrayObject *result = NA_NewAllFromBuffer(
                ndim, shape, type, Py_None, byteoffset, bytestride,
                byteorder, aligned, writeable);

        if (result) {
                if (!NA_NumArrayCheck((PyObject *) result)) {
                       PyErr_Format( PyExc_TypeError,
                                     "NA_NewAll: non-NumArray result");
                       result = NULL;
                } else {
                        if (buffer) {
                                memcpy(result->data, buffer,
PyArray_NBYTES(result));
                        } else {
                                memset(result->data, 0,
PyArray_NBYTES(result)); <-- ??????????????????
                        }
                }
        }
        return  result;
}

def get_polygon_stipple():
  """Return the polygon stipple pattern"""
  cdef maybelong lenght
  cdef void** data
  lenght = 128
  new_array = NA_NewArray(NULL, tUInt32, 1, lenght)
  glGetPolygonStipple(<GLubyte*>NA_OFFSETDATA(new_array)) 
  assert glGetError() != INVALID_OPERATION,\
    "can't be called between gl.begin() and gl.end()"
  return new_array

Here my code. I'm not sure if this is possible? I have also found
NA_getBufferPtrAndSize? Should I use this?

regards

Marco


From ebolonev at rin.ru  Sat Jan  3 05:16:09 2004
From: ebolonev at rin.ru (Egor Bolonev)
Date: Sat, 3 Jan 2004 20:16:09 +1000
Subject: python and LAN
Message-ID: <bt64pg$3mcjk$1@ID-216132.news.uni-berlin.de>

Hello, All!

I wish to write a programs for LAN, but I don't know where to begin.

For example I have to get a hostlist of my network:
...
192.168.1.35  acca
192.168.3.38  alligator
192.168.1.1  alpha
192.168.2.31  andp-duha
192.168.5.76  angel
192.168.2.49  anny
192.168.3.26  antracit
192.168.3.35  array
192.168.5.39  arsen
192.168.4.64  asperansa
192.168.2.44  assasin
192.168.5.17  asterix
192.168.4.53  baggins
192.168.2.38  bars
192.168.4.24  basilio
192.168.4.28  batchhq
192.168.5.46  bazuka
192.168.2.27  benladen
192.168.2.48  bigmag
192.168.4.39  bilya
...

How can I do it with python?

With best regards, Egor Bolonev.  E-mail: ebolonev at rin.ru


From jcarlson at uci.edu  Tue Jan 20 17:05:34 2004
From: jcarlson at uci.edu (Josiah Carlson)
Date: Tue, 20 Jan 2004 14:05:34 -0800
Subject: py2exe 0.5.0 (finally) released
References: <y8s7aeps.fsf@python.net>
	<8a27e309.0401201304.7ee860b0@posting.google.com>
Message-ID: <20040120140452.1C42.JCARLSON@uci.edu>

> Maybe I'm missing it, but I don't see how to specify an icon to use
> for the exe.  Is that funtionality no longer available?
> 
> -Ruben

Perhaps I'm not using the latest version, but --icon <icon file> seems
to work for me.

 - Josiah


From jangseungwook at nate.com  Thu Jan  8 20:29:32 2004
From: jangseungwook at nate.com (jang, seungwook)
Date: 8 Jan 2004 17:29:32 -0800
Subject: pyxml-0.8.3 install problem on RedHat 9
Message-ID: <dea2ed57.0401081729.37efa36d@posting.google.com>

>> python setup.py build

running build
running build.py
no copying xml/FtCore.py (output up-to-date)
blah blah ..

running build_scripts
not copying scripts/xmlproc-parse (up-to-date)
not copying scripts/xmlproc_val (up-to-date)


How can I fix it ?
Please help me ~~ 



Seungwook, Jang


From donald.welch.nospam at hp.com  Sat Jan 10 13:40:30 2004
From: donald.welch.nospam at hp.com (djw)
Date: Sat, 10 Jan 2004 10:40:30 -0800
Subject: solving a small programm
References: <40004254$0$16669$ba620e4c@news.skynet.be>
Message-ID: <40004743@usenet01.boi.hp.com>

As this is obviously a class assignment of some sorts, I don't know how much
help you are going to get (or should get) in directly writing the code.
But, what I will say is that you should be able to look at the way the code
works now, how it keeps track of how many bills are needed for each
denomination (200, 100, etc), and apply the same idea to the total number
of bills required using another variable that is initialized before the
loop begins. 

-d


broebel wrote:

> hey,
> 
> for the real programmers amongst you, this may be really annoying but I've
> been learning the language for only two days.
> 
> this is my problem,
> in this programm,which already works I now have to make a total count of
> how many coins are used.
> this program gives the total per coin. It should be a small peace of code
> (as explained in a tutorial i read, without the answer.)that counts the
> total of all the coins.
> I ve been searching for two days and for this kind of programm it really
> seems kind of long.
> 
> thanks in advance
> 
> # Een bedrag gepast betalen met zo min mogelijk euromunten
> 
> bedrag = input ( 'Geef bedrag tussen 0 en 500 eurocent: ' )
> 
> for munt in 200, 100, 50, 20, 10, 5, 2, 1 :
>     aantal = 0
> 
>     while bedrag >= munt :
>         aantal = aantal + 1
>         bedrag = bedrag - munt
> 
>     if aantal > 0 :
>         print aantal, 'x', munt
> 
> what i need is:
> for example
> the programm gives
> 68= 50*1
>        10*1
>        5*1
>        2*1
>        1*1
> I need an additional code to get the "5" total of all the coins together.



From __peter__ at web.de  Fri Jan  2 16:02:32 2004
From: __peter__ at web.de (Peter Otten)
Date: Fri, 02 Jan 2004 22:02:32 +0100
Subject: re
References: <L8kJb.121167$0P1.98310@twister.nyc.rr.com>
Message-ID: <bt4me2$h97$05$1@news.t-online.com>

Maxim Khesin wrote:

> I am studying the re module and still do not understand how to do some
> really simple tasks:
> 1) say I need to capitalize any word that is between the words 'United'
> and  'of America'. So I do

With the help of A. M. Kuchling's Regular Expression Howto:

>>> import re
>>> sample = " ".join(["United %s of America" % s for s in "birds                                  
states rocks".split()])
>>> r = re.compile("(United )(.*?)(of America)")
>>> def fun(m):
...     return m.group(1) + m.group(2).capitalize() + m.group(3)
...
>>> r.sub(fun, sample)
'United Birds of America United States of America United Rocks of America'
>>> sample
'United birds of America United states of America United rocks of America'
>>>

Disclaimer: I'm no regexpert, so there may be simpler solutions.

Peter



From LittleDanEhren at yahoo.com  Fri Jan 30 20:26:46 2004
From: LittleDanEhren at yahoo.com (Daniel Ehrenberg)
Date: 30 Jan 2004 17:26:46 -0800
Subject: Python vs. Io
References: <711c7390.0401291301.3f95794@posting.google.com>
	<D6wSb.6538$qU3.576425@news20.bellglobal.com>
Message-ID: <711c7390.0401301726.3e38da27@posting.google.com>

"Sean Ross" <sross at connectmail.carleton.ca> wrote
> Hi.
> I took a look at Io because of your post, and I have a question:
> 
> Are there prototype(?) _and_ instance methods/slots?
> 
> In other words, is there a shared state mechanism between instances of a
> prototype?
> If so, could you show an example.
> 
> Thanks,
> Sean

I'm not sure how to tell you this so I'll just give a heavily
commented example (comments in Io are with #, //, or /* */)

parentProto := Object clone //makes parentProto a new object
//:= is used for creating new variables
parentProto shared := 5 //parentProto's new slot shared holds 5
parentProto different := 6
parentProto sum := method(shared + different) //self isn't necessary
write("parentProto's sum: ", parentProto sum, "\n")
x := parentProto clone //essentially new instance of parentProto
y := parentProto clone
x different = 2 //just updating slots is done with =.
y different = 3
write("first x sum ", x sum, "\n",
      "first y sum ", y sum, "\n")
parentProto shared = 7 //should show up on all clones
write("later x sum", x sum, "\n",
      "later y sum", y sum, "\n")

Does that illustrate it well? I know the difference between := and =
is annoying, but you'll get used to it, and it allows really cool
things to be done with scopes and inheretance.

Daniel Ehrenberg


From tim.golden at viacom-outdoor.co.uk  Tue Jan 27 09:09:06 2004
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Tue, 27 Jan 2004 14:09:06 -0000
Subject: winapi: mouseclick
Message-ID: <F1921F85572CB04D9F55B14BDC76B3E443467C@tdi_nt9.internal.viacom-outdoor.co.uk>

>From: KNS [mailto:netquest at sympatico.ca]
>
>
>Thank you for the response.  I am actually using win32all to launch an 
>application and am waiting for user actions or changes in state.  Once 
>the application is launched (e.g., IE) the program just 
>records changes 
>in URLs.  Now I would like the various states (e.g., time, mouse 
>position) saved whenever the mouse is clicked on the application (or
>even the desktop).  So, can I just use an 'if' (within a 
>while-loop) to 
>test whether WM_LBUTTONDOWN == 0 and if so what is the appropriate 
>syntax with win32all?
>
>Thanks.

Could you *please* post some code, or at least pseudo-code, to
show us what you're doing. What is sounds like to me, is that
you're doing this, say:

import win32api
win32api.ShellExecute (0, "open", "iexplore.exe", None, None, 1)

and then you want to know what the user's doing within that
application so that you can, eg, keep track of URLs accessed etc.

Am I close? 

If I am, this isn't easy. If it is, strictly, Internet Explorer that
you're trying to use, then it does have an Events mechanism (about
which I know nothing) which I believe can be accessed from Python.

If it is any application in general which you're trying to keep track
of, that's more difficult. Windows (and by that I mean any modern GUI
system) apps don't work like your old-fashioned batch / terminal 
apps. You don't "wait" for a user to press something; rather, you set
up an event loop and handle or ignore any event which comes in. Each
application does this on its own behalf. To do the same on behalf of
another application requires either subclassing (messy) or system
key / mouse hooks (cf
http://cvs.sourceforge.net/viewcvs.py/uncpythontools/pyHook/)
or some other arcane mechanism.

TJG


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From samirw at connection.com  Wed Jan  7 01:07:36 2004
From: samirw at connection.com (Sambo)
Date: Tue, 06 Jan 2004 22:07:36 -0800
Subject: Finaly found a simple enough task for python, took the plunge,
	but.....
References: <3FFB5312.1030803@connection.com>
	<btfao2$i19$1@news2.tilbu1.nb.home.nl>
	<3FFB8071.9070107@connection.com>
	<afomvvgeti8q3bapj6bumhkmdikgqnf230@4ax.com>
Message-ID: <3FFBA228.7070403@connection.com>

Well, I was hopeful but no luck under w2000 and python 2.3.3
The window is just as obscured as under w95
Must be p2.3.3, oh well 9Mb of junk, good think I upgraded to UNLIMITED access, 
hehe.

Ciao.


engsolnom at ipns.com wrote:

> (top posting..sorry)
> 
> I tried  Vincent's suggested code and it works just fine with Win2000, Python2.3.
> I did change the code to return the path to a selected file, rather than just a directory.
> Shows the value of the newsgroups...I was unaware (of course us newbies are unaware of lots of
> things) of tkFileDialog...and was about to write a tk interface to do the same thing. Saved a ton of
> time, and probably newsgroup bandwidth.
> Thanks, Vincent!



From pythongnome at hotmail.com  Thu Jan 29 20:09:11 2004
From: pythongnome at hotmail.com (Lucas Raab)
Date: Fri, 30 Jan 2004 01:09:11 GMT
Subject: Easy way to make EXEs...
References: <NMDRb.28013$i4.26542@newsread1.news.atl.earthlink.net>
Message-ID: <X8iSb.1962$jH6.125@newsread1.news.atl.earthlink.net>


"Xero Limit 126" <xerolimit126 at earthlink.net> wrote in message
news:NMDRb.28013$i4.26542 at newsread1.news.atl.earthlink.net...
> Okay, I am completely new to Python, and I really dont understand much,
but
> I was wondering how to make a python script/program into a standalone
.EXE?
> I dont understand py2exe at all, so if someone could tell me or find me an
> easy (For a newbie) to convert Python scripts to EXEs, please let me know!
>
> Thanks for any help!
>
>
You should have no trouble with py2exe at all. A simple setup script would
be:

#setup.py
from distutils.core import setup
import py2exe

setup(name="myfile.py",
      scripts=["myfile.py"],
      )

Then to compile that file, go to the command prompt and switch to the
directory that the file is in. For example on my machine I would do the
following:

Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

C:\Documents and Settings\Lucas Raab>cd C:\Python23

C:\Python23>python setup.py py2exe

Wait a few moments for py2exe to compile your script and Voilla!! you have
an executable.




From theller at python.net  Fri Jan 16 14:14:07 2004
From: theller at python.net (Thomas Heller)
Date: Fri, 16 Jan 2004 20:14:07 +0100
Subject: py2exe 0.5.0 (finally) released
Message-ID: <y8s7aeps.fsf@python.net>


**py2exe 0.5.0** (finally) released
===================================

py2exe is a Python distutils extension which converts python scripts
into executable windows programs, able to run without requiring a
python installation.

News

    Python 2.3 is required, because the new zipimport feature is used.
    The zipimport mechanism is able to handle the early imports of the
    warnings and also the encodings module which is done by Python.

    Creates a single directory, which must be deployed completely.

    py2exe can create any number of console and gui executables in
    this directory, plus optionally windows service exes, plus
    optionally exe and dll com servers.  The com servers can expose
    one or more com object classes.

    All pure Python files are contained in a single zip archive, which
    is shared by all the executables.  The zip archive may also be
    used by programs embedding Python.  Since extension modules cannot
    be imported from zipfiles, simple pure Python loaders are included
    in the zipfile which load the extensions from the file system
    (without requiring that the directory is in sys.path).

    It is now simple to build py2exe from the sources, provided you
    have MSVC6 installed - there are no dependencies on win32all
    sources.

    The created executables are standard PE executable files now, no
    longer is something appended to the exe portion.

Download from the usual location:

<http://starship.python.net/crew/theller/py2exe>

Many thanks to Mark Hammond who worked hard to improve the COM
support, and suggested and implemented a lot of the new features.

Enjoy,

Thomas


From francisgavila at yahoo.com  Thu Jan 15 14:18:36 2004
From: francisgavila at yahoo.com (Francis Avila)
Date: Thu, 15 Jan 2004 14:18:36 -0500
Subject: TUPLE & LIST
References: <%7xNb.55$Uw3.50@newsr2.u-net.net><cbad00ljgqjc1dpm4quo8skjd3obc2m154@4ax.com>
	<mailman.407.1074189765.12720.python-list@python.org>
Message-ID: <100dpuer745vfa0@corp.supernews.com>


Gerrit Holl wrote in message ...
>Christos TZOTZIOY Georgiou wrote:
>> Examples:
>> Use a list for a list of names.
>> Use a tuple for (x,y) coordinates in some area.
>> Use a list of (name,phone,address) tuples for your poor man's address
>> book which you will implement in python.
>
>What if someone moves away?
>That is, I think one could better use a mutable type for the address book.

That's why it's a "poor man's" address book. :)
-- 
Francis Avila


From frank at chagford.com  Wed Jan  7 02:01:36 2004
From: frank at chagford.com (Frank Millman)
Date: 6 Jan 2004 23:01:36 -0800
Subject: OT: Vertical Tab was Re: indendation question
References: <20031226033210.GA24039@mrna.tn.nic.in>
	<mailman.130.1072540438.684.python-list@python.org>
	<3FF9E883.BC8AB864@engcorp.com>
	<pan.2004.01.05.23.05.44.722929@yahoo.com>
Message-ID: <246a4e07.0401062301.880cb64@posting.google.com>

Samuel Walters <swalters_usenet at yahoo.com> wrote in message news:<pan.2004.01.05.23.05.44.722929 at yahoo.com>...
> 
> What exactly *is* a vertical tab?  I don't think I've ever seen it on a
> keyboard or used in the wild.  I think I may have seen it on the
> keybindings for a mainframe terminal I once used, but I didn't really dig
> too deep because, as far as operating the mainframe was concerned, I was a
> well trained monkey who could check and restart failed jobs.
> 
> Inquiring minds want to know.
> 
> Sam Walters

I could be wrong, but I seem to remember reading years ago that
vertical tabs were used to control line printers - you could force the
printer to skip straight to a line number instead of issuing a series
of line feeds.

Frank Millman


From peter at engcorp.com  Mon Jan 26 14:47:19 2004
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 26 Jan 2004 14:47:19 -0500
Subject: makeExe.py
References: <mailman.761.1075035209.12720.python-list@python.org>
Message-ID: <40156EC7.27EFC3F6@engcorp.com>

Premshree Pillai wrote:
> 
> Wrote a simple Python script that makes life a wee bit
> easier when using py2exe:
> 
> """
> makeExe.py
> - Simple Python script to automate the creation
>   of Python executables using py2exe.
> 
[snip]
> fp = open("setup.py","w")
> temp = """from distutils.core import setup
> import py2exe
> setup(name = "%s",
>      scripts = ["%s"],
> )""" % (package,fileName)
> fp.write(temp)
> fp.close()

You could save yourself a fair bit of trouble, and avoid writing a
"setup.py" file to the filesystem (possibly overwriting an existing
one which might be important) by just calling the setup() method 
directly yourself.  The only trick is that it checks sys.argv[] for
the "py2exe" argument, so you have to fake that first:

sys.argv[1:] = ['py2exe']

from distutils.core import setup
setup(name=package,
    scripts=[fileName])

That should do the trick....  if you're interested in integrating the
changes, and maintaining it, I'll forward our own script which you can
pull apart and reuse as required...

-Peter


From michael at foord.net  Fri Jan  9 08:09:41 2004
From: michael at foord.net (Fuzzyman)
Date: 9 Jan 2004 05:09:41 -0800
Subject: urllib - changing the user agent
Message-ID: <8089854e.0401090509.3dd74859@posting.google.com>

I'm writing a function that will query the comp.lang.python newsgroup
via google groups.......  (I haven't got nntp access from work..)

I'm using urllib (for the first time)..... and google don't seem very
keen to let me search the group from within a program - the returned
pages all tell me 'you're not allowed to do that' :-)

I read in the urllib manual pages :

class URLopener( [proxies[, **x509]]) 

Base class for opening and reading URLs. Unless you need to support
opening objects using schemes other than http:, ftp:, gopher: or
file:, you probably want to use FancyURLopener.
By default, the URLopener class sends a User-Agent: header of
"urllib/VVV", where VVV is the urllib version number. Applications can
define their own User-Agent: header by subclassing URLopener or
FancyURLopener and setting the instance attribute version to an
appropriate string value before the open() method is called.


Could anyone tell me how to subclass this correctly with the version
attribute set and what text string I should use to mimic Internet
explorer and/or mozilla ?


Ta

Fuzzy


From michele.simionato at poste.it  Wed Jan 14 01:24:54 2004
From: michele.simionato at poste.it (Michele Simionato)
Date: 13 Jan 2004 22:24:54 -0800
Subject: Python is far from a top performer according to benchmark
	test...
References: <ryELb.238$tK2.228@amstwist00>
	<6ee58e07.0401092129.302cb9d4@posting.google.com>
	<pan.2004.01.11.06.08.18.867825@yahoo.com>
	<bttu62$gdh$1@newstree.wise.edt.ericsson.se>
	<btvsvl$pu7$1@panix3.panix.com>
	<95aa1afa.0401130424.49749912@posting.google.com>
	<tyf65fgdm81.fsf@pcepsft001.cern.ch>
Message-ID: <95aa1afa.0401132224.1a8230c@posting.google.com>

Jacek Generowicz <jacek.generowicz at cern.ch> wrote in message news:<tyf65fgdm81.fsf at pcepsft001.cern.ch>... 
> Lest anyone infer that Lisp has an "application niche" consisting of
> AI and theory of programming languages ... take a look at
> 
>   http://www.franz.com/success/
> 
> and glance at the column on the left.

Okay, let's restate my point in this way: if you need a very big
programming power (which, I agree, is not only needed in A.I. & similia),
then Lisp is a good choice. Most of the people in the word don't need
a very big programming power, though. They can need a very big numerical 
power, then they use Fortran. Or they can need moderate programming power 
and moderate numerical power (such as in bioinformatics) and then they use
Perl or Python.

> I suspect that Aahz' working definition of "successful" had more to do
> with success in terms of popularity, rather than success in terms of
> technical excellence: please remember that quality and popularity are
> very weakly correlated.
> 
> If you want to analyze the popularity of a technology, you will get
> far better insight by studying the sociological and historical
> contexts surrounding it rather then its actual technical merits.

I completely agree.
 
> For example, how many readers of this post will be surprised to learn
> that (most) Common Lisp implementations compile to efficient native
> machine code, that Common Lisp has an ANSI standard which includes
> very powerful support for object-oriented programming (to name but two
> features that everybody "knows" it doesn't have) ?
> 
> Go on, raise your hand if you thought that "Lisp" is a slow,
> interperted functional langugage.

Never thought so. IMHO people don't use List because they don't need it, 
not because they think it is a slow, interperted functional language.
There are simpler alternative languages that are good enough for most
people and more suitable in terms of libraries (i.e. Fortran for
numerics, Perl for bioinformatics). Still, Lisp is successful for a
certain audience (I concede, not restricted to A. I. only, but rather 
small anyway). So, it is successful but not popular. This was my
point, in contrast to Aahz's view, and I think we agree.


     Michele Simionato


From http  Mon Jan 12 08:14:38 2004
From: http (Paul Rubin)
Date: 12 Jan 2004 05:14:38 -0800
Subject: need help translating a PHP for statement to python
References: <a015bde3.0401100050.3e6b58c9@posting.google.com>
	<mailman.260.1073726548.12720.python-list@python.org>
	<944baf3371667ab5b21f6020c57ad385@news.teranews.com>
Message-ID: <7xu131s401.fsf@ruckus.brouhaha.com>

Dang Griffith <noemail at noemail4u.com> writes:
> >Haha ... you must be originally a perl coder. Who else writes attricious
> >code like this
> >    if ($bar = (($x_ar[$x] -= $prd + $bar) < 0))
> 
> Any C programmer worth his salt.  I miss those days.  Sort of.


But that line almost certainly has the parentheses in the wrong place.
Look carefully.


From rkern at ucsd.edu  Mon Jan 19 17:19:27 2004
From: rkern at ucsd.edu (Robert Kern)
Date: Mon, 19 Jan 2004 22:19:27 GMT
Subject: efficent test for array with only one value?
In-Reply-To: <00ird1-dmd.ln1@jowls.lairds.org>
References: <00ird1-dmd.ln1@jowls.lairds.org>
Message-ID: <PJYOb.82151$C87.70674@twister.socal.rr.com>

Kyler Laird wrote:

> I'm trying to discover if there's an efficient way to determine
> if all of the values of a Numeric array are the same.  In C, I
> would search from the second value, checking each against the
> first value.  The first one that doesn't match would trigger a
> False return value.  If the loop completes, True would be
> returned.
> 
> Looking through array functions, I'm not finding anything like
> that.  I'm imagining that there should be something like an
> equal function (Is that Lisp I'm recalling?) that performs
> 	a[0,0] == a[0,1] == a[0,2] == ...
> and returns False as soon as it is known.  I don't see that.
> 
> I can, of course, iterate through all of the values, but it
> seems like there should be an efficient built-in function to do
> it.

Python 2.3.3 (#1, Dec 28 2003, 00:16:29)
[GCC 3.3 20030304 (Apple Computer, Inc. build 1495)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
 >>> from Numeric import *
 >>> a = ones((3,5))
 >>> equal.reduce(a.flat)
1
 >>> a[0,3] = 0
 >>> equal.reduce(a.flat)
0
 >>>

Ufuncs are wonderful things.

> Thank you.
> 
> --kyler


-- 
Robert Kern
rkern at ucsd.edu

"In the fields of hell where the grass grows high
  Are the graves of dreams allowed to die."
   -- Richard Harter


From richie at entrian.com  Tue Jan 27 11:52:32 2004
From: richie at entrian.com (Richie Hindle)
Date: Tue, 27 Jan 2004 16:52:32 +0000
Subject: os.path.split: processing paths from one OS on another
In-Reply-To: <401691D7.8050607@holmes.nl>
References: <401691D7.8050607@holmes.nl>
Message-ID: <e55d10tko591ijfftcjufsa8tfpvm4lvqj@4ax.com>

Hi Martijn,

> My server needs to be run on either Linux or Windows, it receives 
> requests from clients that may run either OS. To process those requests 
> i need to split the path and filename. I hoped to solves this using 
> os.path.split (), any suggestions as to how to fix this?

Explicitly use ntpath for Windows clients and posixpath for Linux clients:

>>> import ntpath, posixpath
>>> print ntpath.split('C:\\TEST\\FILE.EXT')
('C:\\TEST', 'FILE.EXT')
>>> print posixpath.split('/TEST/FILE.EXT')
('/TEST', 'FILE.EXT')

Alternatively, change your client to always use forward slashes - then it
(apparently) doesn't matter which you use:

>>> print posixpath.split('c:/test/file.exe')
('c:/test', 'file.exe')
>>> print ntpath.split('c:/test/file.exe')
('c:/test', 'file.exe')
>>> print posixpath.split('//server/share/file.exe')
('//server/share', 'file.exe')
>>> print ntpath.split('//server/share/file.exe')
('//server/share', 'file.exe')

Beware - there may well be cases where they differ.

Windows itself is happy using forward slashes as a directory separator, so
your client can use them throughout.  It's only the Windows shell that
requires backslash rather than forward slash.

-- 
Richie Hindle
richie at entrian.com




From reply.in.the.newsgroup at my.address.is.invalid  Thu Jan  8 12:32:00 2004
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Thu, 08 Jan 2004 18:32:00 +0100
Subject: what is Python's module search path?
References: <b16e4ef7.0401080738.1da0cdc5@posting.google.com>
Message-ID: <iu4rvvcipctl7l46jhskbc6ubj3cu52iu9@4ax.com>

Stephen Ferg:
>I need a little help here.

See "6.1.1 The Module Search Path" on
http://www.python.org/doc/current/tut/node8.html

-- 
Ren? Pijlman


From Kyler at news.Lairds.org  Wed Jan 21 10:12:06 2004
From: Kyler at news.Lairds.org (Kyler Laird)
Date: Wed, 21 Jan 2004 15:12:06 GMT
Subject: calling Pyrex results from C
References: <f7tvd1-a1o.ln1@jowls.lairds.org>
	<20040120172733.GA7666@titan.progiciels-bpi.ca>
	<20040120234855.GV22782@jowls>
	<mailman.560.1074644320.12720.python-list@python.org>
Message-ID: <o3h2e1-24u.ln1@jowls.lairds.org>

The help I've gotten in this thread has enabled me to complete my
assignment...well, at least I can generate C code that spits out
the answer.

I'd like to factor out more of the Python so that my handwritten
C code can do more of the high-level operations.  I'm having some
difficulties passing data between my C and the Pyrex code.

One of the first things I thought I'd build is a helper function
to return a string representation of an object.  I thought that
this would be fairly straightforward.  Unfortunately it segfaults
when called with some Python objects.

Pyrex:
	cdef public image_file_open(char* image_filename):
		return(Image.open(image_filename))

	cdef public image_size(image_PIL):
		return(Image.size)

	cdef public char* string(x):
		s = str(x)
		return(s)

my C:
	void *im, *im_size;
        im = image_file_open(input_filename);
        im_size = image_size(im);
	printf("im=%s\n", string(im));
        printf("im_size=%s\n", string(im_size));

The first call to string() succeeds but the second one fails.  I
suspect that I've expected too much of Pyrex again.  Do I need to
allocate memory, manipulate reference counts or something like
that?

It's difficult for me to get back to thinking in terms of
passing around data in C ways.  I almost forgot what a boon
tuples have been.  (Perhaps I need to code in assembly for
awhile to get back in that frame of mind.)  Someday I might try 
to pass structures between C and Pyrex.  I'm slowly getting
comfortable with Pyrex but I can see how my code can get *much*
cleaner once I understand more of its capabilities.

Thank you.

--kyler


From mark.buch at t-online.de  Fri Jan 30 08:53:51 2004
From: mark.buch at t-online.de (Mark Buch)
Date: Fri, 30 Jan 2004 14:53:51 +0100
Subject: Python ODBC Driver Module
Message-ID: <bvdnl9$3k2$06$1@news.t-online.com>

Hi,

where can i find a freeware python odbc module for windows?

Thanks - Mark




From jjl at pobox.com  Sat Jan 17 15:28:21 2004
From: jjl at pobox.com (John J. Lee)
Date: 17 Jan 2004 20:28:21 +0000
Subject: Python COM Server with C++
References: <a40573e7.0401151408.341bda2a@posting.google.com>
	<ektzacno.fsf@python.net>
Message-ID: <87d69itj4q.fsf@pobox.com>

Thomas Heller <theller at python.net> writes:

> andre.bernemann at gmx.de (Andre Bernemann) writes:
[...]
> I think you should create the typelib first, and then write a com object
> implementing the interfaces.
> 
> I don't have done it myself, but I suggest to look into the spambayes
> project.  It contains an outlook plugin, written by Mark Hammond.
> Most certainly a bag full of ideas.

There's a cut down to bare-bones version of this in the win32all
package.

I wasn't able to get it working with the problem I tried, though (in
contrast to ctypes).  I didn't try too hard, though, I admit ;-)


John


From RaymondChu at nospam.com  Thu Jan  8 18:29:13 2004
From: RaymondChu at nospam.com (Ray Chu)
Date: Thu, 08 Jan 2004 15:29:13 -0800
Subject: Looking for a Python interface to TAPI on Win32
References: <2259b0e2.0307180401.5dae02f2@posting.google.com>
	<mailman.1058530829.7072.python-list@python.org>
	<3f17f883$0$49107$e4fe514c@news.xs4all.nl>
	<2259b0e2.0307190529.57338b3f@posting.google.com>
	<NpkSa.16049$7O.14695@nwrdny01.gnilink.net>
	<2259b0e2.0307200604.44d343f4@posting.google.com>
Message-ID: <fo7rvvoa9bh8m1jg2otndeildpl8gqur7i@4ax.com>



I'd like to get familiar with the Win32 phone interface by using Python.   Googling has just yielded Linux
apps.  Would appreciate specific help or suggestions about where to look.  

- TIA
Ray


From dmm at machinic.net  Sat Jan 10 03:50:07 2004
From: dmm at machinic.net (Davis Marques)
Date: 10 Jan 2004 00:50:07 -0800
Subject: need help translating a PHP for statement to python
Message-ID: <a015bde3.0401100050.3e6b58c9@posting.google.com>

hi;

I'm translating some PHP scripts to Python and have hit a roadblock
with a for statement.  If someone could explain to me how one should
translate the multiple increment, evaluations, etc. in the first line
I would appreciate it deeply ...

for ($y = 0, $x = $cx-$cy-1; $y <= $cy; ++$y,++$x) {
    $prd = $q * $y_ar[$y] + $car;
    $prd -= ($car = intval($prd / 1E7)) * 1E7;
    if ($bar = (($x_ar[$x] -= $prd + $bar) < 0)) $x_ar[$x] += 1E7;
    }

thanks,


Davis


From Vincent.Raaijmakers at ge.com  Mon Jan 26 09:01:33 2004
From: Vincent.Raaijmakers at ge.com (Raaijmakers, Vincent (GE Infrastructure))
Date: Mon, 26 Jan 2004 08:01:33 -0600
Subject: JPG - PNG conversion problem
Message-ID: <971323274247EB44B9A01D0A3B424C85058496FD@FTWMLVEM02.e2k.ad.ge.com>

Who can explain the huge increase in size when I convert a JPG into a PNG format using PythonMagick:
I read the JPG from a video server and has a resolution of 352x240, size is about 15k
After my PNG conversion and resizing the resolution to 160*120, the size is 64k!!

This is what I do:

##image = jpg data read from a server with a 352x240 resolution

blob = Blob()
blob.data   = str(image)

data_len="jpg length data: %s" % len(blob.data)
logger.info(data_len) ## size is about 15k
     
## convert blob data into a Image
img = Image(blob)
img.depth = 8
img.magick = "PNG"
s = "!%sx%s" % (160, 120)
img.sample(s)

# convert back into data for streaming purposes
blob = Blob()
img.write(blob)

data_len="png length data: %s" % len(blob.data)
logger.info(data_len)  ## size now 64k?!


what is wrong, or what do I forget to do? Is it the direct conversion from JPG to PNG,
do I need to add a step in between to RGB...
Also, tried to play with quality settings on the image, compressionTypes... nothing seem to help.

Needs advice!

thanks in advance,
Vincent



From skip at pobox.com  Fri Jan  2 13:02:33 2004
From: skip at pobox.com (Skip Montanaro)
Date: Fri, 2 Jan 2004 12:02:33 -0600
Subject: version-independence between Python & BerkDB in Solaris packages?
Message-ID: <16373.45625.635475.90942@montanaro.dyndns.org>


This is kinda off-topic for this group, but since I'm packaging Python
perhaps not too far OT.

I built a Solaris package for Python 2.3.3 then copied it to another system
and installed it.  Nothing too earth-shaking there.  When I ran the
regression test it barfed in test_bsddb because it couldn't find the
Berkeley DB library.  I went back to the first system and am now in the
midst of updating from DB 4.0.14 to DB 4.2.52 and will then build a Solaris
package for it.

Unfortunately that means I'll have to rebuild and repackage Python as well,
since _bsddb.so depends on a specific Berkeley DB package:

    % ldd _bsddb.so 
            libdb-4.0.so =>  /usr/local/BerkeleyDB.4.0/lib/libdb-4.0.so
            libc.so.1 =>     /usr/lib/libc.so.1
            libdl.so.1 =>    /usr/lib/libdl.so.1
            /usr/platform/SUNW,Ultra-80/lib/libc_psr.so.1

Is it possible to compile and package Python and the external libraries it
uses to minimize coupling between package versions like this?  I note that
other modules which link to specific external libraries don't have such
problems:

    % ldd zlib.so
            libz.so =>       /usr/lib/libz.so
            libc.so.1 =>     /usr/lib/libc.so.1
            libdl.so.1 =>    /usr/lib/libdl.so.1
            /usr/platform/SUNW,Ultra-80/lib/libc_psr.so.1

Maybe it's just unavoidable with Berkeley DB because there are so many
versions liable to be installed simultaneously.

Thanks,

Skip




From jepler at unpythonic.net  Mon Jan 26 22:35:41 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Mon, 26 Jan 2004 21:35:41 -0600
Subject: Python on portable storage
In-Reply-To: <slrnc1bj85.lot.bignose-hates-spam@iris.polar.local>
References: <slrnc1bj85.lot.bignose-hates-spam@iris.polar.local>
Message-ID: <20040127033541.GB24260@unpythonic.net>

I forgot to mention that you should refer to the documentation to find
out about using .zip files to store .py/.pyc modules.  This will have a
fairly dramatic effect on the amount of space needed to store the
standard library.

Jeff



From and-google at doxdesk.com  Mon Jan 12 11:52:06 2004
From: and-google at doxdesk.com (Andrew Clover)
Date: 12 Jan 2004 08:52:06 -0800
Subject: Division oddity
References: <ssn3009029rrug3l8dk1pn06tqd019ucld@4ax.com>
	<7xeku5vrn8.fsf@ruckus.brouhaha.com>
	<5d83790c.0401120125.7d186102@posting.google.com>
Message-ID: <2c60a528.0401120852.4f8aaf32@posting.google.com>

Raymond Hettinger <python at rcn.com> wrote:

> So, the way to get eval() to respond to the import is to pass along
> the current environment:

> >>> from __future__ import division
> >>> eval('9/2', globals())
> 4.5

You can also put a future-import in the string, allowing you to run code
with features not known until run-time (and without affecting the host
script). Of course the catch is that import is a statement, not an
expression, so you have to do it with 'exec', eg.:

  expr= '9/2'
  features= 'division'
  scope= {}
  exec 'from __future__ import %s\n__assign= (%s)'%(features,expr) in scope
  print scope['__assign']

  4.5

What you then *can't* do is have a future-import in the host script without
it affecting the script in the exec block.

Python 2.2+ has a much nicer way of doing it involving passing flags to the
'compile' function, which is preferable if you don't need backwards
compatibility.

Anyway, straying from the original point here.


From xah at xahlee.org  Mon Jan 26 12:43:09 2004
From: xah at xahlee.org (Xah Lee)
Date: 26 Jan 2004 09:43:09 -0800
Subject: perl bug File::Basename and Perl's nature
References: <7fe97cc4.0401242131.22acf485@posting.google.com>
	<40136b6d@news.victoria.tc.ca>
Message-ID: <7fe97cc4.0401260943.2442ba4e@posting.google.com>

just a few notes to wrap this thread up.

* several perl morons didn't heed my imperative of perusing the notes
in "perldoc File::Basename". By their nature, they skimmed and scanned
and came back with "the doc said so!". They posses no attention to
detail nor knowledge of precision writing, consequently with lowered
reading comprehension. Like a man exposed to noise or shit or
malfunction, they hear nothing, smell nothing and ebythin's alright.

* when it gets one to think about design, File::Basename is one
fucking turd. The suffix list should not be regex in the first fucking
place. (it shouldn't even require a suffix list by default). The need
to feed it OS type (fileparse_set_fstype($os)) is fucking defeating
the main point of using this module.

Fuck Perl and fuck Perl morons around the world.

 Xah
 xah at xahlee.org
 http://xahlee.org/PageTwo_dir/more.html

--------------------------------------
Responsible Software License
By: Xah Lee, 2003 July

Software is a interesting invention. Software has this interesting
property, that it can be duplicated without cost, as if like copying
money. Never in history are goods duplicable without cost. But with
the invention of computer, the ephemeral non-physical programs breaks
that precept. In digital form, program and music and books all become
goods in essentially infinite quantity.

All is good except, bads in digital form can also multiply equally,
just as goods. Wellknown examples are computer viruses and email
spams. Unknown to the throng of unix morons is software bads. In a
unix moron's mind, the predominant quip among hackers is "where is
your code?", singnifying the mentality that a hacker's prestige is
judged on how much code he has contributed to the community.
Therefore, every fucking studs and happy-go-lucky morons put their
homework on the net, with a big stamp of FREE, and quite proud of
their "contributions" to the world. These digital bads, including
irresponsible programs, protocols, and languages, spread like viruses
until they obtained the touting right of being the STARDARD or MOST
POPULAR in industry, as if indicating superior quality. Examplary are
C, Perl, RFC, X-Windows, Apache, MySQL, Pretty Home Page (and almost
anything out of unix). The harm of a virus is direct. The harm of
irresponsible software (esp with unscrupulous promotion) is the
creation of a entire generation of bad thinking and monkey coders. The
scales can be compared as to putting a bullet in a person brain,
versus creating a creed with the Holocaust aftermath.

Distribution of software is easily like pollution. I thought of a law
that would ban the distribution of software bads, or like charging for
garbage collection in modern societies. The problem is the difficulty
of deciding what is good and what is bad. Like in so many things, i
think the ultimate help is for people to be aware; so-called
education; I believe, if people are made aware of the situation i
spoke of, then irresponsible software will decrease, regardless any
individual's opinion.

--

The most important measure to counter the tremendous harm that
irresponsible software has done to the industry is to begin with
responsible license, such that the producer of a software will be
liable for damage incurred thru their software. As we know, today's
software licenses comes with a disclaimer that essentially says the
software is sold as is and the producer is not responsible for any
damage, nor guaranteeing the functionality of the software. It is
this, that allows all sorts of sloppitudes and fucking fads and myths
to rampage and survive in the software industry. Once when software
producers are liable for their products, just as bridge or airplane or
transportation or house builders are responsible for the things they
build, then injurious fads and creeds the likes of (Perl, Programing
Patterns, eXtreme Programing, "Universal" Modeling Language...) will
automatically disappear by dint of market force without anyone's
stipulation.

In our already established infrastructure of software and industry
practices that is so already fucked up by existing shams, we can not
immediately expect a about-face in software licenses from 0 liability
to 100% liability. We should gradually make them responsible. And
this, comes not from artificial force, but gradual establishment of
awareness among software professionals and their consumers. (Producers
includes single individual to software houses, and consumers includes
not just mom & pop but from IT corps to military.)

archived at
http://xahlee.org/UnixResource_dir/writ/responsible_license.html

 Xah
 xahlee.org
 http://xahlee.org/PageTwo_dir/more.html


From nospam at nowhere.hu  Sun Jan 25 18:33:44 2004
From: nospam at nowhere.hu (Miklós)
Date: Mon, 26 Jan 2004 00:33:44 +0100
Subject: Guardian: open source is a throwback says Jack Schofield
References: <64cff82f.0401251143.328388bd@posting.google.com>
	<mailman.772.1075066543.12720.python-list@python.org>
Message-ID: <bv1jkf$g46$1@namru.matavnet.hu>


"Skip Montanaro" <skip at pobox.com> wrote in message
news:mailman.772.1075066543.12720.python-list at python.org...
>
> Does Jack Schofield perhaps work for SCO? <wink>
>
> Skip
>

Either that or Microsoft. ;-)  Or he's plain stupid.

Mikl?s





From wilkSPAM at OUTflibuste.net  Sun Jan  4 07:37:43 2004
From: wilkSPAM at OUTflibuste.net (Wilk)
Date: Sun, 04 Jan 2004 13:37:43 +0100
Subject: Cheetah best for templating?
References: <CMudnfQnOeIn1GqiRVn-uQ@comcast.com>
Message-ID: <87wu87nb3c.fsf@blakie.riol>

"Roger Jack" <rjack at elegancetech.com> writes:

> I have just finished reading Code Generation In Action which uses Ruby for
> code generation. I would like to use Python instead. Is Cheetah the best
> tool to use for templating source code files and then generating code? Is
> there something more mature or better?

My graphist and me found it excellent, fast, clear, simple, stable : Pythonic !

We found the others engines too verbose, more perlish ;-)

Like python, the best is to try somes engines, you will see quickly wich
one you need. First, like everybody, i did my own engine, but Cheetah
was finaly a better wheel !

I use it to generate html, latex and xml

-- 
Wilk - http://flibuste.net


From dave at pythonapocrypha.com  Fri Jan 23 16:37:27 2004
From: dave at pythonapocrypha.com (Dave Brueck)
Date: Fri, 23 Jan 2004 14:37:27 -0700
Subject: progress bar
References: <59e5b87.0401231329.6e084d6f@posting.google.com>
Message-ID: <033701c3e1f9$19037870$6401fea9@YODA>

> OS: Win2K
> Python version: 2.2
> 
> Seeking references to documentation that discuss how a python script
> can handle displaying a progress bar.  Also, if you are aware of any
> sample code that illustrates this, I'm interested in looking at that
> sample code.
> 
> Are there ways to accomplish this that do not involve using a
> full-featured GUI toolkit like Tkinter or wxPython or PythonCard?

Try Venster:
http://venster.sourceforge.net

IIRC the test_coolbar.py script includes a progress bar.

-Dave



From hgeldenhuys at gims.com  Wed Jan 28 09:54:52 2004
From: hgeldenhuys at gims.com (Herman Geldenhuys)
Date: Wed, 28 Jan 2004 16:54:52 +0200
Subject: Security validation issue
Message-ID: <004301c3e5ae$af7b00d0$b10d10ac@metasalio>

I've written a Zope product that exposes a "MenuItem". I add a menuItem in a Zope folder, and I have no difficulty accessing and editing it via the ZMI. I've written an xml-rpc-like protocol for Zope, that basically validates the security "manually". 

This menuItem has an attribute called "def getVersion(self):" which returns an int.

This is the Code that prevents me from accessing the method in python, via my protocol:

if not AccessControl.getSecurityManager().validate(None, object, attributes[-1]):
                        raise UnauthorisedAccessException('Unauthorised: ' + originalAddress)

object = <bound method HWMenuItem.getVersion of <HWMenuItem instance at 01B7B290>>
              This is the method getVersion

attributes[-1] = "getVersion" (string)

UnauthorisedAccessException: Unauthorised: menus.administration.addUser.getVersion

This code works for any other default Zope type, but not mine. Did I perhaps forgot a permission or something?

I can access this fine via the ZMI, but when I validate it this way, python just starts cursing at me.

Can somebody help?

Thanks

H
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From lbates at swamisoft.com  Fri Jan 23 11:00:16 2004
From: lbates at swamisoft.com (Larry Bates)
Date: Fri, 23 Jan 2004 10:00:16 -0600
Subject: debugging
References: <88bc63c6.0401230416.7acf904c@posting.google.com>
Message-ID: <8aidnWC5nryR2Izd4p2dnA@comcast.com>

Doug,

I use a loggerclass to log debugging/tracing information
to a log file during the program execution.  I trigger these
logging statements by setting python variables _trace and
_debug at the top of my program execution (normally by reading
them from a .INI file using ConfigParser).  This way I can
trace/debug my program and then easily turn them off when
the code is finalized.  I leave this code in the application
and find that it can prove to be very valuable should a
problem arise in the future.  Just turn on trace/debug and
take a look at the log file.  I don't believe that there
is significant overhead in a few "if _debug: logf.writelines..."
statements in the code.

-Larry


"Doug Farrell" <writeson at earthlink.net> wrote in message
news:88bc63c6.0401230416.7acf904c at posting.google.com...
> Hi all,
>
> Can someone help me out a little with Python? What do people use to
> debug Python code? I don't understand how to use the built in debugger
> and I haven't had any luck getting ddd to debug my Python programs. I
> end up falling back on inserting print statements in my code to figure
> out what's going on. This works but isn't always the fastest route to
> a solution. So, I'm just wondering what other people do.
>
> Thanks,
> Doug




From NAVMSE-SRV003 at techblu.com  Thu Jan 29 08:35:59 2004
From: NAVMSE-SRV003 at techblu.com (Anti Virus Administrator)
Date: Thu, 29 Jan 2004 05:35:59 -0800
Subject: Norton AntiVirus detected and quarantined a virus in a message you
	sent.
Message-ID: <D493D373CEB0C2498D6CB2D629D30DFE493520@srv003.staa.com>

Recipient of the infected attachment:  SRV003, First Storage
Group\Mailbox Store (SRV003), Neha Manchanda/Inbox/resume
Subject of the message:  ERROR
One or more attachments were quarantined.
  Attachment lvfpu.zip was Quarantined for the following reasons:
    Virus W32.Novarg.A at mm was found.
    Virus W32.Novarg.A at mm was found in lvfpu.doc
.exe.

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From aahz at pythoncraft.com  Thu Jan 22 16:48:38 2004
From: aahz at pythoncraft.com (Aahz)
Date: 22 Jan 2004 16:48:38 -0500
Subject: What is object()
References: <mailman.655.1074790103.12720.python-list@python.org>
	<bup01m$hjm$1@panix1.panix.com>
	<10105gchtsl1a21@news.supernews.com>
Message-ID: <bupgfm$h1a$1@panix2.panix.com>

In article <10105gchtsl1a21 at news.supernews.com>,
John Roth <newsgroups at jhrothjr.com> wrote:
>"Aahz" <aahz at pythoncraft.com> wrote in message
>news:bup01m$hjm$1 at panix1.panix.com...
>> In article <mailman.655.1074790103.12720.python-list at python.org>,
>> Hameed Khan  <hameedkhaan at yahoo.com> wrote:
>>>
>>>  i was reading library refrence manual. there i found
>>>object() function. they says in library refrence that
>>>        "Return a new featureless object. object() is
>>>a base for all new style classes. It has the methods
>>>that are common to all instances of new style
>>>classes."
>>
>> There's not much use for an instance of object.  Don't worry about it.
>
>Unless, of course, you're using the __new__() method.

"Not much" != "none"  ;-)
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

A: No.
Q: Is top-posting okay?


From bignose-hates-spam at and-benfinney-does-too.id.au  Mon Jan 26 21:09:26 2004
From: bignose-hates-spam at and-benfinney-does-too.id.au (Ben Finney)
Date: 27 Jan 2004 12:59:26 +1050
Subject: Python on portable storage
Message-ID: <slrnc1bj85.lot.bignose-hates-spam@iris.polar.local>

Howdy all,

I'm experimenting with carrying my personal computing environment around
on a keychain USB flash storage device.  I have the usual suspects on
there: SSH keys, GPG keys, program configs.

I'm probably not the first to think that a standalone distribution of
Python would be a useful thing to have in my back pocket.  Finding
information on that is proving to be a problem, however.

Can anyone provide pointers to how to go about this?  My goals are:

  - Carry a working Python >= 2.3 on the thing (must).
  - Be able to run it on GNU/Linux systems from the device (must).
  - Be able to run it on Win32 systems from the device (maybe).
  - Refer to one copy of the standard library, regardless of how many
    instances of the python executable (must).
  - Ease of updating when future Python releases come out (maybe).

-- 
 \          "Time's fun when you're having flies."  -- Kermit the Frog |
  `\                                                                   |
_o__)                                                                  |
Ben Finney <http://bignose.squidly.org/>


From mark at mceahern.com  Sun Jan 25 17:51:24 2004
From: mark at mceahern.com (Mark McEahern)
Date: Sun, 25 Jan 2004 16:51:24 -0600
Subject: find function
In-Reply-To: <bv1fp0$s84$1@news.rz.uni-karlsruhe.de>
References: <bv1fp0$s84$1@news.rz.uni-karlsruhe.de>
Message-ID: <1075071084.27914.90.camel@dev.internal>

On Sun, 2004-01-25 at 16:25, Uwe Mayer wrote:
> Hi,
> 
> is there for python a find() function, like the perl module Find or the
> command line tool find?

Try:

  import glob
  pattern = '*.pyc'
  for name in glob.glob(pattern):
    print name

glob's not recursive, though.  For that, consider os.walk:

  import os
  path = '.'
  extensions = ('.pyc',)
  for root, dirs, files in os.walk(path):
    for name in files:
      prefix, ext = os.path.splitext(name)
      if ext not in extensions:
        continue
      fullname = os.path.join(root, name)
      print fullname

The above code may have syntax errors since I didn't run it.

// m




From paul at prescod.net  Sat Jan 24 18:24:33 2004
From: paul at prescod.net (Paul Prescod)
Date: Sat, 24 Jan 2004 15:24:33 -0800
Subject: [OPINION] - does language really matter if they all
	do	the	samething?
In-Reply-To: <58587302-4E30-11D8-8FAB-0003934ACDEC@zdome.net>
References: <69A0D4AB81C51447AD6BA387782B8D64093D8A@midl-mail4.etcconnect.com>	<028FD9F0-4E01-11D8-BB78-0003934ACDEC@zdome.net>	<4011C497.1040302@prescod.net>
	<58587302-4E30-11D8-8FAB-0003934ACDEC@zdome.net>
Message-ID: <4012FEB1.5000106@prescod.net>

Dietrich Epp wrote:
> Please understand, before you read this, that I think Python is the most 
> elegant language that looks and feels natural.  My point is that there 
> are plenty of programming techniques which aren't natural in Python, but 
> are still useful.

I don't dispute this. Python is not the last and only programming 
language. But your specific examples were not compelling. I would have 
believed you if you'd said you do a bunch of logic programming and found 
Prolog more comfortable. (but even in extreme cases like that I would be 
tempted to see whether the task can be accomplished with a library or 
mixin rather than a new language)

> Well, I don't mean that you absolutely can't capture a message, but it's 
> just not something that's natural in Python the way it is in Objective 
> C.  In Objective C, I can create an object which doesn't respond to some 
> message "foo".  However, if I send "foo" to the object, it gets a chance 
> to respond.  In Python, there is no concept of messages.  You would have 
> to override the function that gets an object's attribute and create a 
> function for it to return.  You can capture function calls, but 
> capturing method calls is a two-step process in Python which requires a 
> little bit of magic to implement.

Programming languages are designed to turn processes that take N steps 
into processes that take M steps. You seem to know enough Python to 
trivially write a function that does the filtering necessary to capture 
method calls. You can steal the code from the XML-RPC lib that is 
already in the standard library.

> If I wanted to make this personal, I would accuse you of choosing your 
> patterns to fit the language rather than vice versa.

I don't mean to be personal. But a lot of ex-Lisp programmers do not 
feel the need to go back to Lisp to accomplish common tasks and a lot of 
ex-Perl programmers use Python without going back to Perl. It's quite 
possible that it is just a matter of preference. Some people would 
rather go back to the language with the built-in feature and others 
would rather extend Python with the feature they need. They are benefits 
to both ways of doing it.

I tend to lean towards the integrating approach: it feels like more of a 
"solution" to the problem than a workaround (i.e. once I've extended 
Python it remains extended but if I switch languages then I have to keep 
switching language the next time I have a similar problem). What if you 
run into one of these problems in the middle of a ten thousand line 
program? You have to figure out a way to exchange data between Python 
and the other language, you have to distribute both interpreters, make 
sure people on the team can read both languages, etc.

Of course there are (rare) circumstances where the other languages' 
advantages are so extreme that it justifies the cost of integration, 
distribution, training, etc.

 >...
> Of course, you haven't seen my code, nor I yours.  My most recent Perl 
> script was about twenty lines of nothing but regular expressions and a 
> couple dictionary operations.  That would have been even less readable 
> and writable in Python.

My experience is that the readability of regexp programs in Perl and 
Python is roughly the same. I'll give a concrete example in a separate 
email on Cameron Laird's thread.

> ... My Lisp project related to an RPG and random 
> generation of items.  It had lots of code like the following:
> 
> (defun random-sword-magic-power (quality)
>   (choose-random-assoc
>     quality (poor medium good)
>     ((5 0 0) (glows-in-the-dark))
>     ((3 3 0) (magically-silent))
>     ((1 5 1) (elemental-power (select-random '(earth water air fire))))
>     ((0 2 4) (magical-keen-edge))
>     ((0 0 2) (append (random-sword-magic-power 'medium)
>                      (random-sword-magic-power 'medium)))))

module game_symbols

class symbol: pass

water  = symbol(water)
earth = symbol(earth)
poor = symbol(poor)
medium = symbol(medium)
good = symbol(good)

=======

from random import choice
from game_symbols import *

def choose_random_assoc(selector, properties):
	# I can't find a defintion for this through Google
	# So I presume you invented and implemented it yourself

	value, options = selector
	for key, value in properties.items():
		... do something ...


function random_sword_magic_power(quality):
     return choose_random_assoc(
	selector = (quality, (poor, medium, good)),
	properties = {	(5, 0, 0): glows_in_the_dark(),
	              	(3, 3, 0): magically_silent(),
			(1, 5, 1): elemental_power(
			  choice([earth, water, air, fire])
			(0, 2, 4): magical_keen_edge(),
			(0, 0, 2): ????}

I don't follow what you are doing with the last line so I didn't 
duplicate it.

So let's score this. I don't expect you to argue that the Python one is 
some kind of stylistic slam-dunk. Personally I PREFER the variety of 
syntax rather than using parens for everything. That's why I used a dict 
instead of a tuple for the properties mapping. I used predeclared 
symbols for things like "poor", "medium", "good" etc. so I'll get better 
error messaging if I mistype them. (I could of course have used just 
strings)

> The numbers on the left are probabilities relative to the other 
> probabilities in the same column.  So, when generating a random 'poor' 
> magic quality of a sword, you have a 5/9 chance of getting 'glow in the 
> dark'.  For a 'good' quality, you have a 2/7 chance of getting two 
> 'medium' qualities instead.  It is difficult for me to imagine how one 
> would go about making this function more concise, to me it looks 
> downright minimal.  The only thing I could see making it smaller would 
> be removing the parentheses, but they would have to be replaced by 
> something else such as commas or tabs.

The question isn't whether the Python could be massively better. That 
would be moving the goal post. The question is whether the Lisp version 
is different enough that a Python programmer should switch to Lisp for 
this project. I wouldn't advise it myself.

> I'm not trying to say that all applications are like my application, and 
> I'm not trying to say that my application can't be written in Python.  
> I'm just saying that using macros, a paradigm that Python doesn't even 
> come close to supporting, makes reading and writing functions like the 
> above a lot easier.  You don't even need to know that 
> 'choose-random-assoc' is a macro, you just need to know how to use it.  
> Heck, defun is a macro in Clisp.

I didn't know it was a macro and I don't know why it needs to be a macro 
rather than a function. One argument could be performance. If so, I'd 
plead no contest. A good reason to use other languages is performance. C 
for memory manipulation performance. Perl for regexp performance. Lisp 
and C++ for "do things at compile time rather than runtime" performance. 
But as I understood the conversation we were talking about 
expressiveness, not performance.

> I agree that functions are objects in Python.  However, not everything 
> in Python is an object.  For example, names are not objects.  In the 
> above example, "foo.bar()", neither "foo" nor "bar" are objects, but 
> they are references to objects.  In some languages, such as C and Lisp, 
> references to objects can be directly manipulated (Lisp has symbols, C 
> has pointers).

Pointers are not at all analogous to Python names. C variables and 
struct fields are analogous to Python names. Those can only be 
manipulated by the C preprocessor.

>...
> 
> In Python you have to be careful because this won't normally capture 
> just method calls, but all attribute accesses.  
> def reset_settings(self):
>     method = None
>     try:
>         method = self.delegate.default_settings
>     except AttributeError:
 > ...
> If you think this example is contrived, maybe you haven't worked with 
> the paradigms used in Objective-C very much.

I don't dispute it is real. I would say that it is RARE, but not contrived.

   The example above was used
> dozens of times in a class that I wrote in Objective-C which draws a 
> grid to the screen, for example, when it asks itself or its delegate 
> what color the grid should be, or the maximum scale allowed.  The 
> practice is also used heavily by Apple's Cocoa libraries, which are my 
> favorite UI libraries of all time to program with.

There is no question that some things take 2 lines in one programming 
language and 5 in another. But let's say you wrap this pattern up in a 
base class or metaclass or function. Is Python _still_ much more 
complicated for this problem area than Objective-C? In this particular 
case it should be easy to tell. What does Python/Cocoa code look like?

Surely you would agree that if a problem can be easily solved by a 
little bit of code which can be saved in a library then it is not a 
particularly deep problem. That's not the sort of thing I would switch 
languages for. Now the differences between Java and Python are pretty 
deep. Trying to make Python statically typed or O'CAML dynamically typed 
is a Big Deal. But I really don't really see Python's regular expression 
or "message capturing" conventions to be deep issues.

  Paul Prescod




From phleum_nospam at chello.se  Wed Jan 14 16:39:04 2004
From: phleum_nospam at chello.se (Carl)
Date: Wed, 14 Jan 2004 22:39:04 +0100
Subject: function minimization
References: <pan.2004.01.14.09.08.27.455056@libero.it>
Message-ID: <GuiNb.74$O41.733@amstwist00>

Stefano Covino wrote:

> Hi!
> 
> Does anyone of you know a python library to find minima of
> multivariable mathematical functions?
> 
> I know that in SciPy there is what I need, however I wonder if there is
> something lighter without the need to install the whole package.
> 
> Thank you a lot,
> Stefano

See

http://pylab.sourceforge.net/

then

optimize.py

/Carl


From dlmurray at micro-net.com  Tue Jan 13 22:32:38 2004
From: dlmurray at micro-net.com (Dave Murray)
Date: Tue, 13 Jan 2004 20:32:38 -0700
Subject: I come not to bury C++, but to praise it...
References: <mailman.342.1074045951.12720.python-list@python.org>
Message-ID: <1009e0uldj5eq29@corp.supernews.com>

> sprintf("All the cool guys use %s because %s\n", Myfavoritelanguages,
> Mylimitedexperience)

Very good! I hope that that's not under copyright, I plan to use it.

Dave




From marco at bubke.de  Wed Jan  7 11:13:51 2004
From: marco at bubke.de (Marco Bubke)
Date: Wed, 07 Jan 2004 17:13:51 +0100
Subject: shelve and writeback
References: <btgg8o$nlg$2@graf.cs.uni-magdeburg.de>
Message-ID: <bthb89$enc$1@graf.cs.uni-magdeburg.de>

Hi

Have updated to 2.3.3 and the bug is gone.

Sorry

regards

Marco


From featherstone80 at hotmail.com  Wed Jan 14 16:03:22 2004
From: featherstone80 at hotmail.com (Narsil)
Date: 14 Jan 2004 13:03:22 -0800
Subject: Quick question.....
Message-ID: <379178f1.0401141303.62713fbf@posting.google.com>

I have a list, which consists of just numbers.

Is there a command that will allow me to total up these numbers and get an average?

Say for example, the list looks thus:

numberlist = [10, 2, 5, 7, 3, 46, 4, 5, 87, 5]

How would I get the total, and how would I get the average?

Thanks in advance

TomN


From eltronic at juno.com  Sat Jan 10 22:52:52 2004
From: eltronic at juno.com (eltronic at juno.com)
Date: Sat, 10 Jan 2004 22:52:52 -0500
Subject: help with Python Environment For Blind User
Message-ID: <20040110.225253.-3953201.1.eltronic@juno.com>

On Sun, 11 Jan 2004 02:39:21 GMT "Zachary" <vzd1s1fs at verizon.net> writes:
> I'm a blind non-programmer trying to learn Python.
> I've got python 2.3 for windows, but the problem is that Idle 
> doesn't seem
> to work two well with my screen reading program.
> Is notepad, then, my only other real choice?  
no, try http://www.editpadlite.com/
you can rename it notepad.exe and put it in
place of the origional notepad.exe .
it indents, can put spaces when you hit tab
and handles larger files than notepad.

where can someone find details about the
screen reading program? maybe idle can be fixed.


e

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From trickster121990 at hotmail.com  Wed Jan 21 22:47:20 2004
From: trickster121990 at hotmail.com (Jess Martin)
Date: Thu, 22 Jan 2004 14:17:20 +1030
Subject: python
Message-ID: <BAY9-F28JJjIRPZYvJ4000795c3@hotmail.com>

i need help.
im just learning to program and
every time i try to do a command more than
a line long it wont work

_________________________________________________________________
Get less junk mail with ninemsn Premium. Click here  
http://ninemsn.com.au/premium/landing.asp




From eric.brunel at N0SP4M.com  Thu Jan  8 08:09:42 2004
From: eric.brunel at N0SP4M.com (Eric Brunel)
Date: Thu, 08 Jan 2004 14:09:42 +0100
Subject: Communicating with MSVC++ via COM: how?
Message-ID: <btjkb8$som$1@news-reader4.wanadoo.fr>

Hi all,

We're trying to communicate with Microsoft Visual C++ 6.0 via COM to make it 
perform a few operations. Our main need is to set a breakpoint on a given line 
in a given file. We ended up with the following script:

---------------------------------------------
import win32com.client
import time

## Get MSVC++ main application
app = win32com.client.Dispatch('MSDev.Application')

## Make the window visible
time.sleep(2)
app.Visible = 1

## Get loaded documents in MSVC++ and close them all
docs = app.Documents
docs.CloseAll()

## Load pseudo-workspace for our executable
workSpace = "C:\\tmp\\AllCheckings\\AllCheckings\\Debug\\AllCheckings.exe"
docs.Open(workSpace, 'Auto', 1)

## Open file where we want to put the breakpoint
docs.Open( "C:\\tmp\\AllCheckings\\ccg\\MyFile.c" )

## Get MSVC++ debugger
dbgr = app.Debugger

## Get breakpoint list
bkpts = dbgr.Breakpoints

## Clear all break points, then add the one we want
bkpts.RemoveAllBreakpoints()
bkpts.AddBreakpointAtLine(86)
---------------------------------------------

This script doesn't work: the call to docs.CloseAll fails with the error:

Traceback (most recent call last):
   File "test.py", line 13, in ?
     docs.CloseAll()
TypeError: object of type 'int' is not callable

which is quite weird, to say the least...

Since we didn't understand what was going on, we finally decided to comment out 
this line and to try again. The script then fails on the last line with the error:

Traceback (most recent call last):
   File "test.py", line 30, in ?
     bkpts.AddBreakpointAtLine(86)
   File "H:\Tools\Python\bin\Windows\Python21\win32com\client\dynamic.py", line 
151, in __call__
     return 
self._get_good_object_(apply(self._oleobj_.Invoke,allArgs),self._olerepr_.defaultDispatchName,None)
pywintypes.com_error: (-2147352573, 'Membre introuvable.', None, None)

The weird thing is that apparently, something is actually called, since a 
breakpoint *is* set, but not on the line we requested. It seems to be set on the 
line where the cursor is in the file opened in MSVC++.

In fact, it seems like just doing docs.CloseAll or bkpts.AddBreakpointAtLine 
(without the ()) does not return the method, but actually calls it.

We tried to use makepy to generate the COM support files for the objects we 
used, but the result were even weirder: the line "app.Visible = 1" crashed, 
saying that the attribute could not be set. Using gencache.EnsureModule didn't 
help: it also crashed because of an attribute MinorVersion missing on a module.


Did we miss something here? We're somewhat rookies wrt COM, but we're quite 
fluent with Python (apparently, this doesn't seem to help a lot...). Did anyone 
succeed in communicating with MSVC++ via COM from Python? Or did anyone see the 
kind of problems we're having here? We're using Python 2.1 with win32all-136.

TIA
-- 
- Eric Brunel <eric dot brunel at pragmadev dot com> -
PragmaDev : Real Time Software Development Tools - http://www.pragmadev.com



From peter at engcorp.com  Mon Jan 12 09:15:07 2004
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 12 Jan 2004 09:15:07 -0500
Subject: Straw poll on Python performance (was Re: Python is far from a
 top performer ...)
References: <ryELb.238$tK2.228@amstwist00>
	<3fff234a$0$129$e4fe514c@dreader3.news.xs4all.nl>
	<3FFF26A1.943DEA84@engcorp.com>
	<7xsmio4uhs.fsf@ruckus.brouhaha.com>
Message-ID: <4002ABEB.9E7E7EFB@engcorp.com>

Paul Rubin wrote:
> 
> Peter Hansen <peter at engcorp.com> writes:
> > This is my "straw poll" question:
> >
> >   Do you spend a "significant" amount of time actually optimizing your
> >   Python applications?  (Significant is here defined as "more than five
> >   percent of your time", which is for example two hours a week in a
> >   40-hour work week.)
> 
> Yes, absolutely.
> 
> > Algorithmic improvements that you would make regardless of implementation
> > language do not qualify, and wasting time optimizing a script that you
> > run once a year so it takes ten seconds instead of fifteen also does not
> > qualify because you certainly didn't need to do it...
> 
> Sometimes I'll take the time to implement a fancy algorithm in Python
> where in a faster language I could use brute force and still be fast
> enough.  I'd count that as an optimization.

I would count it as optimization as well, which is why I qualified my
comment with "regardless of implementation language".  Clearly in your
case that clause does not apply.

-Peter


From jjl at pobox.com  Fri Jan 23 07:40:05 2004
From: jjl at pobox.com (John J. Lee)
Date: 23 Jan 2004 12:40:05 +0000
Subject: Accessing Microsoft Word from Python
References: <mailman.676.1074841832.12720.python-list@python.org>
	<buqmqm$f6$1@news.service.uci.edu>
Message-ID: <874qum6dp6.fsf@pobox.com>

Josiah Carlson <jcarlson at nospam.uci.edu> writes:

> Mickel Gr?nroos wrote:
> > Hi!
> > I'm fiddling with Python for Windows (normally using Linux) and as a
> > part
> > of that I want to try to make a simple word frequency list generator to be
> > used in conjunction with Microsoft Word. Does anybody have any good
[...]
> Sounds like something that could be done with VB.  VB will let you
> script anything in Word or Office, but then it requires you to learn
> the horror that is VB.  Perhaps a limited interface is available
> through COM, but I wouldn't bet the farm on it.

I think the entire thing is exported through COM, and VB uses that.


John


From skip at pobox.com  Sat Jan 10 08:50:09 2004
From: skip at pobox.com (Skip Montanaro)
Date: Sat, 10 Jan 2004 07:50:09 -0600
Subject: QOTW?
In-Reply-To: <pan.2004.01.09.21.35.40.132608@yahoo.com>
References: <ryELb.238$tK2.228@amstwist00> <btn5db$2f8$1@absinth.dialog.net.pl>
	<pan.2004.01.09.21.35.40.132608@yahoo.com>
Message-ID: <16384.785.498004.8567@montanaro.dyndns.org>


QOTW perhaps?

    Sam> I read the benchmark and I think it doesn't measure python in it's
    Sam> target area.  That's like taking a world-class marathon runner and
    Sam> wondering why he doesn't compete well in a figure-skating event.

Skip



From ralph at sluiters.de  Wed Jan  7 02:01:57 2004
From: ralph at sluiters.de (Ralph Sluiters)
Date: Wed, 7 Jan 2004 08:01:57 +0100
Subject: I got the solution [was:Re: Problem: 'Threads' in Python?]
References: <btcfjc$pgu$1@nets3.rz.RWTH-Aachen.DE>
Message-ID: <btgas0$9pf$1@nets3.rz.RWTH-Aachen.DE>

Simply put the last part in an extra file 'cachedata.py', then use

import os
os.spawnlp(os.P_NOWAIT, 'python', 'python', 'cachedata.py')

to call this as child process and DON'T wait for this process.

Ralph




From max at alcyone.com  Wed Jan 21 22:03:44 2004
From: max at alcyone.com (Erik Max Francis)
Date: Wed, 21 Jan 2004 19:03:44 -0800
Subject: python said : "1, 2, 3, 6, 7, manbo !"
References: <pan.2004.01.21.20.53.18.750567@address.com>
Message-ID: <400F3D90.2176087B@alcyone.com>

- wrote:

> Why 5 does not appear ? (this was the source of a deep bug in a 4000+
> lines networked program...)

You are iterating over a mutable sequence while you are mutating it. 
That is a big no-no.

-- 
 __ Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
/  \ San Jose, CA, USA && 37 20 N 121 53 W && &tSftDotIotE
\__/ Life is painting a picture, not doing a sum.
    -- Oliver Wendell Holmes, Jr.


From aahz at pythoncraft.com  Fri Jan  2 19:16:46 2004
From: aahz at pythoncraft.com (Aahz)
Date: 2 Jan 2004 19:16:46 -0500
Subject: Conditional except: blocks
References: <mailman.34.1073079463.12720.python-list@python.org>
Message-ID: <bt51le$9sm$1@panix2.panix.com>

In article <mailman.34.1073079463.12720.python-list at python.org>,
Robert Brewer <fumanchu at amor.org> wrote:
>Aahz wrote:
>> That's pretty sick.  If you really need to do that, here's a more
>> Pythonic approach:
>>=20
>>     # This goes at beginning of program
>>     # or maybe at class/instance initialization
>>     if trapErrors:
>>         exceptTuple =3D (Exception,)
>>     else:
>>         exceptTuple =3D (None,)
>>=20
>>     # some time later
>>     try:
>>         return nextHandler(args)
>>     except exceptTuple, exc:
>>         # Handle exception
>
>Sure, sure. The point was not so much the JIT tuple-unpacking as it was
>the (conditional) use of None in the "except" expression.

<nod>

>BTW, I don't think you need a tuple at all. Might we just as well write:
>
>    if trapErrors:
>        exceptTuple =3D Exception
>    else:
>        exceptTuple =3D None
>
>?

For this purpose, yes.  But I figured one might as well make it a bit
more generic, just for the purpose of documentation.

>FWIW (and just to start a flame war ;) I tend to avoid using a flag
>(like 'trapErrors'), only to trigger such an intermediate step as the
>above. I get antsy when that intermediate value gets used "some time
>later". If I were to do something like the above, it would be put
>immediately before the actual use. The other option would be to have
>whoever is setting trapErrors (to True or False) instead directly set
>exceptTuple to Exception, None, or what-have-you.

Sure; exceptTuple is the only part that needs to be generally available.
My point was more that by setting exceptTuple early in the script, you
clarify what your program is doing.  Using a subscript selector in the
``except`` clause is an unPythonic hack, partly because it's less
maintainable.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

Weinberg's Second Law: If builders built buildings the way programmers wrote 
programs, then the first woodpecker that came along would destroy civilization.


From bokr at oz.net  Thu Jan  8 21:58:20 2004
From: bokr at oz.net (Bengt Richter)
Date: 9 Jan 2004 02:58:20 GMT
Subject: Bits from Numbers.
References: <3ffcb189$1@nntp0.pdx.net>
Message-ID: <btl5cc$66k$0@216.39.172.122>

On Wed, 07 Jan 2004 16:36:43 -0800, sdd <daniels at dsl-only.net> wrote:

>I am whacking away at some code to view numbers as bit sequences.
>While this is not complete, I'd appreciate some feedback from anyone
>who is interested in looking at it:
>     http://members.dsl-only.net/~daniels/bits.html
>
>As the page describes, bit extract of more than an int's worth of bits
>from a long at one go does not yet work.
>
>
>The basic idea is that the (non-complex) python numbers can be
>viewed as an infinite binary bit stream:
>
>     ...........000101.11000.....  is 5.75
>
>There are functions to get the least and most significant bit
>numbers, examine a particular bit, and extract a consecutive
>chunk of bits.
>
>At the bottom of the page are links to source archives and windows
>installers for 2.2 and 2.3.
>
>For now, consider this a pre-alpha.  I am soliciting comments
>on both the definitions and names of the functions provided.
>
>However, I'd like to point out now that negative integers have
>an infinite number of ones _and_ zeros in their expansion above,
>so popcount as traditionally defined for negative integers is
>unworkable.

No time to look now, but maybe 

    http://mail.python.org/pipermail/python-list/2003-December/199683.html

will give you something useful? BTW, it proposes a literal string format that takes
care of the infinitely repeating sign bit problem (i.e., you don't repeat it, except
for representing -1 as '11b' for symmetry with '01b' for +1) but you always have a one
or zero leading bit that you can repeat as needed to make whatever width.

Regards,
Bengt Richter


From skip at pobox.com  Sat Jan 10 13:48:30 2004
From: skip at pobox.com (Skip Montanaro)
Date: Sat, 10 Jan 2004 12:48:30 -0600
Subject: xml-rpc
In-Reply-To: <vvub6otnlfdi56@corp.supernews.com>
References: <vvub6otnlfdi56@corp.supernews.com>
Message-ID: <16384.18686.623407.634068@montanaro.dyndns.org>


    Walt> Curious about why the same very simple xml-rpc demo code should
    Walt> execute quickly under python2.1 but very slowly under python2.3

    Walt> python2.1  ~4 seconds
    Walt> python2.3  ~24 seconds on the same machine

    Walt> Is there a well known reason for the difference?

Nope.  I tweaked your script to contact my XML-RPC server over the net
(about 20-30ms ping times between client and server) and just make
server.echo() calls.  It took between 1.6 and 2.5 seconds real time running
python 2.4a0 (aka CVS) on the client and 2.2.3 on the server.  Note that the
server is in production, so the different times were probably due to
transient server load.

Skip



From fortepianissimo at yahoo.com.tw  Sun Jan  4 15:15:10 2004
From: fortepianissimo at yahoo.com.tw (Fortepianissimo)
Date: 4 Jan 2004 12:15:10 -0800
Subject: codecs packages?
Message-ID: <ef08387c.0401041215.453fd308@posting.google.com>

I'd like to decode some email headers into unicode, including some
Asian DBCS. I've searched several places and they pointed to the
Python Codecs project @ SF
(http://sourceforge.net/projects/python-codecs/), but I couldn't find
anything there. Could someone give me a pointer to any related
library? Thanks.


From francisgavila at yahoo.com  Tue Jan 13 23:03:29 2004
From: francisgavila at yahoo.com (Francis Avila)
Date: Tue, 13 Jan 2004 23:03:29 -0500
Subject: Myth or Urban Legend? Python => Google [ was: Why learn Python
	??]
References: <40029dad$0$28706$a729d347@news.telepac.pt><btubno$bd8k6$1@ID-46268.news.uni-berlin.de><100655fo84c2211@corp.supernews.com><btv7gf$btv1p$1@ID-46268.news.uni-berlin.de><87d69og2jl.fsf@pobox.com><bu0v9v$c6nr4$1@ID-46268.news.uni-berlin.de>
	<mailman.343.1074047955.12720.python-list@python.org>
Message-ID: <1009fum3evnc96a@corp.supernews.com>

EP wrote in message ...
>Is it true that the original Google spider was written in Python?

I don't know *what* Google uses Python for, but it uses Python.

>It would seem like the poster boy example for using Python in some 
>respects, if true.

Um, nothing new about this:

http://python.org

Read the top center of the front page....

-- 
Francis Avila


From james at logicalprogression.net  Thu Jan 22 05:35:07 2004
From: james at logicalprogression.net (James Henderson)
Date: Thu, 22 Jan 2004 10:35:07 +0000
Subject: Assignment to slice
In-Reply-To: <nIIPb.22964$zj7.8188@newsread1.news.pas.earthlink.net>
References: <20040121191546.4975.qmail@web40102.mail.yahoo.com>
	<mailman.606.1074714639.12720.python-list@python.org>
	<nIIPb.22964$zj7.8188@newsread1.news.pas.earthlink.net>
Message-ID: <200401221035.07776.james@logicalprogression.net>

On Thursday 22 January 2004 4:54 am, r.e.s. wrote:
> "James Henderson" <james at logicalprogression.net> wrote ...
>
> JH  Assignment to x[-4:-3] is not same as assignment to x[-1:0]:

Since this wasn't made clear in r.e.s.'s post I'd just like to point out that 
the above obervation was in response to the proposal that a negative index 
"i" was simply a shorthand for "i + len(x)".  (len(x) was 3.)

James
-- 
James Henderson, Logical Progression Ltd.
http://www.logicalprogression.net/
http://sourceforge.net/projects/mailmanager/




From rganesan at myrealbox.com  Sat Jan 24 11:12:58 2004
From: rganesan at myrealbox.com (Ganesan R)
Date: Sat, 24 Jan 2004 21:42:58 +0530
Subject: Perl vs. Python for text manipulation
References: <69A0D4AB81C51447AD6BA387782B8D64093D8A@midl-mail4.etcconnect.com>
	<028FD9F0-4E01-11D8-BB78-0003934ACDEC@zdome.net>
	<mailman.720.1074906442.12720.python-list@python.org>
	<1013o27e3nb141@corp.supernews.com>
	<ouhdyloduy.fsf@andlx-anamika.cisco.com>
	<du73ca5r4t8.fsf@amadeus.cc.tut.fi>
Message-ID: <ouad4dnx4l.fsf@andlx-anamika.cisco.com>

>>>>> "Ville" == Ville Vainio <ville.spamstermeister.vainio at thisisspamprotectiontut.finland> writes:

>>>>> "Ganesan" == Ganesan R <rganesan at myrealbox.com> writes:
Ganesan> is nearly 6 times slower in python (8 time slower with
Ganesan> Python 2.2) using fileinput. Every appears to know that
Ganesan> fileinput is slower and avoid it when performance is a
Ganesan> concern; but even manually doing the equivalent is slower
Ganesan> in python. I've simply switched back to using perl for my

> A while back someone fixed his python script to use normal files
> instead of stdin, and the Python version proved to be even faster than
> the Perl version. Have you tried that?

Are you saying that iterating over normal files instead of stdin is faster?
I ran some tests just now and it doesn't seem to make any significant
difference. On the other hand, my current tests show that python is only 40%
slower than perl for IO instead of twice as slow as I mention
above. Something has changed for the better in python (or worse in perl!)
since I last ran the tests. I am running Debian testing versions of python
and perl. I'll run some more tests and share the test scripts and results
sometime next week.

Ganesan

--
Ganesan R



From anthony at interlink.com.au  Sat Jan 10 22:09:09 2004
From: anthony at interlink.com.au (Anthony Baxter)
Date: Sun, 11 Jan 2004 14:09:09 +1100
Subject: py2exe, Inno Setup, and tkinter
Message-ID: <200401110309.i0B39ARe002821@localhost.localdomain>

I'm trying to use py2exe and Inno Setup to build an installer for 
shtoom, which uses tkinter.

If I take the py2exe generated directory, and run the executable from
there, it works fine.

If I add all the files in the directory to an installer (including 
the tk-8.4 and tcl-8.4 directories), it builds an installer fine.

But when I run the installer, and install to, say c:/Program Files/Shtoom,
running the program fails with 
Traceback (most recent call last):
  File "<string>", line 78, in ?
  File "<string>", line 75, in main
  File "<string>", line 66, in findUserInterface
  File "<string>", line 33, in tryTkInterface
  File "shtoom\ui\tkshtoom.pyc", line 23, in main
  File "shtoom\ui\tkui\main.pyc", line 11, in __init__
  File "Tkinter.pyc", line 1564, in __init__
_tkinter.TclError: Can't find a usable init.tcl in the following directories: 
    {c:/Program Files/lib/tcl8.4} {c:/Program Files/lib/tcl8.4} c:/lib/tcl8.4 {c:/Program Files/library} c:/library c:/../tcl8.4.3/library

This probably means that Tcl wasn't installed properly.

The init.tcl is actually in C:/Program Files/Shtoom/tcl8.4. Why is
it not looking in the correct location? How can I fix this? 

Thanks,
Anthony



From jorgencederberg at hotmail.com  Mon Jan 12 04:09:57 2004
From: jorgencederberg at hotmail.com (=?ISO-8859-1?Q?J=F8rgen_Cederberg?=)
Date: Mon, 12 Jan 2004 10:09:57 +0100
Subject: CGI module problem: duplicated output
In-Reply-To: <mailman.288.1073895526.12720.python-list@python.org>
References: <mailman.219.1073658628.12720.python-list@python.org>	<9smuvv0ou8qpilg9vlpgpqt45apalmur49@4ax.com>
	<mailman.288.1073895526.12720.python-list@python.org>
Message-ID: <jvtMb.409$L97.222@news.get2net.dk>

Mimal wrote:
>> Pardon me for saying so, but I don't believe you.  Your script must
>> actually look like this:
> 
> 
> Pardon me too, but I know what my script looks like. I'm not such a 
> fool! I've tested this script under Windows NT + Python 2.1 and Windows 
> XP + Python 2.3 with the same result.
> 
> To prove you, I copied YOUR code and pasted to *.py file. Than I made it 
> executable and run it using console (./cgi.py). This is what it showed:
> 
> <html>Hello, world!</html>
> Content-type: text/html
> 
> <html>Hello, world!</html>
> <html>Hello, world!</html>
> Content-type: text/html
> 
> <html>Hello, world!</html>
> 
> I know it's very strange. I don't get it and that's why I need help. :-)
> 

No it is not strange. What you didn't mention in your first posting is 
that you named your file cgi.py. Thus, when you run your script, you 
start of by importing it, and therefore the messages are printed twice.

How about renaming it to mimal_cgi.py!

Regards
Jorgen



From loic at yermat.net1.nerim.net  Thu Jan 22 12:26:58 2004
From: loic at yermat.net1.nerim.net (Yermat)
Date: Thu, 22 Jan 2004 18:26:58 +0100
Subject: prog/lib to draw graphs
In-Reply-To: <buofpq$1ra$06$1@news.t-online.com>
References: <buofpq$1ra$06$1@news.t-online.com>
Message-ID: <bup14p$dnc$1@biggoron.nerim.net>

graphivz seems good but it is an external tool... Is there something 
similar as http://gef.tigris.org for python ?

Yermat



From harry.g.george at boeing.com  Fri Jan 23 04:42:01 2004
From: harry.g.george at boeing.com (Harry George)
Date: Fri, 23 Jan 2004 09:42:01 GMT
Subject: Batch commands on Windows
References: <7A3Qb.4870$AK2.3953@newssvr29.news.prodigy.com>
	<mailman.689.1074867434.12720.python-list@python.org>
Message-ID: <xqxptdb6lxy.fsf@cola2.ca.boeing.com>

"Dave Brueck" <dave at pythonapocrypha.com> writes:

> Moosebumps wrote:
> > So, after reading some messages about os.system, and looking at the popen
> > stuff and trying it a bit, I still have not found a way to keep a command
> > window open for several commands (on Windows 2000/XP), while seeing the
> > normal output in a command window.  All I want to do is do what a batch file
> > does, but I want to actually have functions and associative arrays and all
> > the other niceties of python.
> 
> Can you give an example of what you mean, in Perl as well as what you hoped
> would work in Python? I couldn't quite understand what it is that you're trying
> to do.
> 
> > What's the deal with that?  I thought Python started out as a scripting
> > language.  And that seems like the most basic thing that a scripting
> > language should do.
> 
> Dunno, although MS-DOS shell scripting is certainly a small subset of scripting
> in general. Maybe with a concrete example somebody will be able to give you a
> hand.
> 
> -Dave
> 
> 

I wonder if this is miscommunication over "script" vs "shell window".
This confused me when trying python scripts in MS Windows after using
then in *NIX.
  
Quite often a script will output to stdout.  In *NIX the script is
usually run from a shell, in which case the output goes to the shell
and you can see it.  But in Windows there is no automatic shell -- you
have to explicitly tell the script where to put the output.  Otherwise
a DOS shell wakes up long enough to complain and then goes away. (At
least that's what I think is happening.)

An alternative is to install cygwin and run scripts from the bash
shell -- you will see output.  Even better, install emacs too, then
run scripts from inside am emacs bash shell buffer -- you can then
search, edit, print, etc the output.

Another alternative is to redirect your script output to a file, and
then examine it via notepad or (if linefeeds are screwed up) wordpad.

-- 
harry.g.george at boeing.com
6-6M31 Knowledge Management
Phone: (425) 342-5601


From gerrit at nl.linux.org  Wed Jan 28 04:02:05 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Wed, 28 Jan 2004 10:02:05 +0100
Subject: I support PEP 326
In-Reply-To: <20040128041023.2EB9225B353@bonanza.off.ekorp.com>
References: <698f09f8.0401272000.79704ef0@posting.google.com>
	<mailman.654.1074788734.12720.python-list@python.org>
	<698f09f8.0401271318.21c9ca72@posting.google.com>
	<bv6ph8$181$1@news.service.uci.edu>
	<20040128041023.2EB9225B353@bonanza.off.ekorp.com>
Message-ID: <20040128090205.GA3086@nl.linux.org>

Anthony Baxter wrote:
> >>> len(dir(__builtins__))
> 125
> 
> That's a _lot_ of stuff in one module. Even if you exclude the 40-odd 
> exceptions that are there, that's still a lot of guff in one big flat
> namespace.

Any plans to clean it up in Python 3.0?

In my opinion, a lot of builtins could either be deleted or moved into a
module:

buffer
complex -> to math
open (use file)
long
abs -> to math
apply -> use extended syntax
compile -> to sys
divmod -> to math
execfile -> to sys
filter, reduce -> to functional?
intern -> ?
map -> use list comp
oct/hex -> to math?
range/xrange (unify)
round -> to math

Gerrit.

-- 
227. If any one deceive a barber, and have him mark a slave not for
sale with the sign of a slave, he shall be put to death, and buried in his
house. The barber shall swear: "I did not mark him wittingly," and shall
be guiltless.
          -- 1780 BC, Hammurabi, Code of Law
-- 
PrePEP: Builtin path type
    http://people.nl.linux.org/~gerrit/creaties/path/pep-xxxx.html
Asperger's Syndrome - a personal approach:
	http://people.nl.linux.org/~gerrit/english/



From rmkrauter at yahoo.com  Wed Jan 21 14:15:46 2004
From: rmkrauter at yahoo.com (Rich Krauter)
Date: Wed, 21 Jan 2004 11:15:46 -0800 (PST)
Subject: Assignment to slice
Message-ID: <20040121191546.4975.qmail@web40102.mail.yahoo.com>

I hope this gets tacked on to the original thread.
Sorry if it doesn't.

I see your point. However I could be wrong, but I
don't know if what you say is really the case, since
negative indexes are just shorthand for

      actual positive index = i + len(x), 

where i is the negative index, and len(x) >= abs(i).

e.g.

x = [1,2,3,4,5]
x[-4] is equivalent to x[-4+len(x)], which is x[1]
x[-4:-2] is equivalent to x[(-4+len(x)):(-2+len(x))],
which is x[1:3] 

I contend that my restriction may still hold even in
the case of negative indices, since negative indices
(which are just convenient shorthand), should map to
positive indices.

In that case, 
x = [1,2,3]
x[-10:-9] = [54] should return an exception too since,

x[-10:-9] = x[-10+len(x):-9+len(x)] == x[-7:-6], which
is REALLY out of bounds of x. 

Instead python will just tack stuff on to the front of
the array. Which, I still believe, is totally
inconsistent. But what do I know? I have about 5
minutes of python experience. 

I guess I just don't like that behaviour. At least in
perl if I assign something to a list slice:

@x[2..3] = (4,5);

the list grows,  so that the things I inserted are at
the indices where I think I inserted them.
That is, @x  now contains (0,0,4,5).

So later if I ask for $x[3], or $x[4], I get back what
I put there in the first place.

In python this is not true. The indices will change
because of the append-like behavior:

>> x = []
>> x[2:3] = [4,5]
>> x 
[4,5]

That just doesn't seem right. Either always raise an
out-of-bounds exception or always grow the list.
Python seems to be doing a combination of both, and in
an inconsistent way, at that (or, more accurately, in
a way that does'nt make sense to me). 

Oh well. Maybe my problem is that I'm using perl as my
model of consistency. Plus, it's a minor issue anyway.
I just need to be aware of it, and not try to write
perl code in python. I need to learn to write python
code in python.

Thanks for your input.

Rich


> This doesn't answer you fully but Python is at least
> consistent in that 
> slicing - as opposed the indexing of your first case
- 
> *never* raises an 
> IndexError.  It's not unique to assignment.  "print 
> x[1000:9000]" works too.>

> The fact that slices can extend outside the current
> range is useful.  
> Otherwise you couldn't use them to extend sequences.
  > Adding to the end 
> would still be possible with your proposed
restriction >on first index., but 
> what if you wanted to add stuff to the *start* of
the > list.  Currently this 
> works:
>

> >>> x = [1, 2, 3]
> >>> x[-10:-9] = [54]
> >>> x
> [54, 1, 2, 3]


>
> In this case to be consistent you must insist that
the second index exist in 
> the array, i.e. insist on:

> >>> x[-4:-3] = [54]

> James
> -- 
> James Henderson, Logical Progression Ltd.
> http://www.logicalprogression.net/
> http://sourceforge.net/projects/mailmanager/

> On Wednesday 21 January 2004 5:01 pm, Rich Krauter >
wrote:
> I do not understand why python behaves the way it
does
> in the following code:
>
> Here, Python doesn't like that I'm assigning
> out-of-range.  OK. That's fine.
>
> >>> x = []
> >>> x[5] = 3
>
> Traceback (most recent call last):
>   File "<interactive input>", line 1, in ?
> IndexError: list assignment index out of range
>
> However, the following seems very strange. Assigning
> to a slice, over non-existent array indexes, sets
x[0]
> and x[1].
>
> >>> x[2:5] = [3,4]
> >>> x
>
> [3,4]
>
> >>> x[1000:9000] = [5]
> >>> x
>
> [3, 4, 5]
>
> Why does assigning to a slice of non-existent array
> elements fill in the array, starting with the first
> empty array position? (Acts like [].append() or
> [].extend()?)
>
> Why not raise an out-of-bounds exception here too?
> Wouldn't that be more consistent with the first
case,
> in which I tried to assign out-of-range, and got an
> exception?
>
> IMO, at least the first index in the slice should be
> required to exist in the array. If not, raise an
> exception. That way, assigning to the slice fills in
> the array in a predicatable way without having to do
> len() checks first to ensure that you know where in
> the array the slice is actually going to be
inserted.
>
> But I'm sure it is the way it is for a good reason.
> Hopefully someone can clue me in.
>
> Thank you in advance.
>
> Rich


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From ajsiegel at optonline.com  Wed Jan 21 21:06:41 2004
From: ajsiegel at optonline.com (Arthur)
Date: Thu, 22 Jan 2004 02:06:41 GMT
Subject: [Numpy-discussion] Status of Numeric
References: <CEELJPECNGEGKFNDLHFFGEBKCCAA.perry@stsci.edu>	<mailman.533.1074574795.12720.python-list@python.org>	<bumghc$dsb$1@nrc-news.nrc.ca>
	<vpmt0058gq2hj2q8jh8pakm9d80eridvmv@4ax.com>
	<mailman.617.1074727375.12720.python-list@python.org>
Message-ID: <8g7u001k257pr6tjl3ng9t7pn3gvbq2328@4ax.com>

On Wed, 21 Jan 2004 16:22:43 -0700, Tim Hochberg
<tim.hochberg at ieee.org> wrote:

>Arthur wrote:
>[SNIP]
>> Which, to me, seems like a worthy goal. 
>> 
>> On the other hand, it would seem that the goal of something to move
>> into the core would be performance optimized at the range of array
>> size most commonly encountered.  Rather than for the extraodrinary,
>> which seems to be the goal of numarray, responding to specific needs
>> of the numarray development team's applications.
>
>I'm not sure where you came up with this, but it's wrong on at least two 
>counts. 

Its easy to accept that I am wrong, since I wasn't partiuclarly trying
to be right about anything.

>The first is that last I heard the crossover point where 
>Numarray becomes faster than Numeric is about 2000 elements. It would be 
>nice if that becomes smaller, but I certainly wouldn't call it extreme. 
>In fact I'd venture that the majority of cases where numeric operations 
>are a bottleneck would already be faster under Numarray. In my 
>experience, while it's not uncommon to use short arrays, it is rare for 
>them to be a bottleneck.

Couldn't one argue that - for example - in 3d graphic applications the
performance as to short arrays is crucial.

Not that I really care to argue.  I will be happy (and privileged) to
work with whatever is decided and created.  Understanding that I am
out of my league in trying to understand the implications of the
trade-offs  involved.  

But hoping that in fact numarray does come to be accepted as the
"standard".  

>
>The second point is the relative speediness of Numeric at low array 
>sizes is the result that nearly all of it is implemented in C, whereas 
>much of Numarray is implemented in Python.

Good for me.  I'll be able to understand more of it.

> This results in a larger 
>overhead for Numarray, which is why it's slower for small arrays. As I 
>understand it, the decision to base most of Numarray in Python was 
>driven by maintainability; it wasn't an attempt to optimize large arrays 
>at the expense of small ones.

I was indeed making an assumption here.  Ifs its wrong, its indeed
wrong.

>
>> Has the core Python development team given out clues about their
>> feelings/requirements for a move of either Numeric or numarray into
>> the core? 
>
>I believe that one major requirement was that the numeric community come 
>to a consensus on an array package and be willing to support it in the 
>core. There may be other stuff.
>
>
>> It concerns me that this thread isn't trafficked.
>
>I suspect that most of the exchange has taken place on 
>numpy-discussion at lists.sourceforge.net.
>

The original post was a request for feedback from the wider community.

My only intent was to feedback.  I think the issue is important. 

For reasons that are non-technical, I believe it much to the best that
the community continue to look to one package of the sort as a
standard.  To me. even better if it makes it into the core
distribution.

And I could even be wrong about that.

Art


From max at alcyone.com  Tue Jan 13 00:02:22 2004
From: max at alcyone.com (Erik Max Francis)
Date: Mon, 12 Jan 2004 21:02:22 -0800
Subject: building strings with variable input
References: <pduMb.6321$g4.137247@news2.nokia.com>
	<400273B8.E991F41D@alcyone.com>
	<qnkd69pp4ph.fsf@arbutus.physics.mcmaster.ca>
	<4002F93D.298A2394@alcyone.com>
	<qnk4qv0pnmz.fsf@arbutus.physics.mcmaster.ca>
Message-ID: <40037BDE.CAFB05A9@alcyone.com>

"David M. Cooke" wrote:

> Do you mean something like
> os.environ['startTime'] = '`rm -rf /`'
> ?

No, I mean something like

	os.environ['startTime'] = '"; rm -rf /; : "'

The lesson to be learned here is:  Do not build shell commands from
untrusted inputs.  Ever.

-- 
 __ Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
/  \ San Jose, CA, USA && 37 20 N 121 53 W && &tSftDotIotE
\__/ You are free and that is why you are lost.
    -- Franz Kafka


From tim.golden at viacom-outdoor.co.uk  Mon Jan 26 04:15:19 2004
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Mon, 26 Jan 2004 09:15:19 -0000
Subject: -- Pythonic control of Windows GUI application: tabs and list
	views
Message-ID: <F1921F85572CB04D9F55B14BDC76B3E4434659@tdi_nt9.internal.viacom-outdoor.co.uk>

>-----Original Message-----
>From: zapazap at yahoo.com [mailto:zapazap at yahoo.com]

[.. snip explanation of sending messages to Windows controls ..]

>For the "List-View" and "Tab" controls then, I expected to find the
>constants
>
>    win32con.LVM_GETCHECK       
>    win32con.TCM_GETITEMCOUNT   
>
>corresponding to the distinct messages documented at [3] and [4]. 
>Unfortunately the module win32com module does not have any LVM_* or
>TCM_* attributes, and I have not found reference to such constants in
>the Extensions documentation.

To answer this question most directly, the TCM_GETITEMCOUNT etc. 
message constants will ultimately just be numeric values. If 
win32con doesn't have them (and it doesn't have everything) 
then just Google around to find out where they're defined. 
If you already have a recent win32 sdk knocking around, 
you'll find them in one of the header files (*.h).

As a hint from someone who's had to do this quite a lot,
Googling for (eg) const TCM_GETITEMCOUNT is likely to
get you something useful, as both Delphi & VB have
a lot of adherents on the web, and someone in those
communities is bound to have done the same kind of
thing that you're trying. In this case, the first hit
is:

http://www.vbaccelerator.com/home/VB/Utilities/ActiveX_Documenter/ActiveX_Do
cumenter_Source_zip_cTabCtrl_ctl.asp

which seems to have some useful constants.

As an aside, have you look at this and related posts by
Simon Brunning? I honestly don't know if it's directly
of use, but it may throw up some clues.

http://www.brunningonline.net/simon/blog/archives/000664.html

TJG



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From usenet_spam at janc.invalid  Fri Jan 23 23:32:49 2004
From: usenet_spam at janc.invalid (JanC)
Date: Sat, 24 Jan 2004 04:32:49 GMT
Subject: Batch commands on Windows
References: <7A3Qb.4870$AK2.3953@newssvr29.news.prodigy.com>
	<mailman.689.1074867434.12720.python-list@python.org>
	<grmQb.15157$yd7.13778@newssvr27.news.prodigy.com>
Message-ID: <Xns947A386D63D33JanC@213.119.4.35>

"Moosebumps" <crap at crud.com> schreef:

> BatchTest.py:
> 
> # the intention is to do the same thing as BatchTest.bat, [...]
> # in particular the environment variable is not saved,

BatchTest.bat sets the environment variable in the same shell that 
executes it, BatchTest.py sets the environment variables in a subshell, and 
the changes made in the subshell are discarded when it terminates.

-- 
JanC

"Be strict when sending and tolerant when receiving."
RFC 1958 - Architectural Principles of the Internet - section 3.9


From michele.simionato at poste.it  Thu Jan 15 10:15:55 2004
From: michele.simionato at poste.it (Michele Simionato)
Date: 15 Jan 2004 07:15:55 -0800
Subject: super. could there be a simpler super?
References: <mailman.385.1074156644.12720.python-list@python.org>
Message-ID: <95aa1afa.0401150715.61e44550@posting.google.com>

Kerim Borchaev <warkid at hotbox.ru> wrote in message news:<mailman.385.1074156644.12720.python-list at python.org>...
> Hello!
> 
>   Always when I use "super" I create a code duplication because class
>   used as first arg to "super" is always the class where the method
>   containing "super" was defined in:
>   '''
>   class C:
>       def method(self):
>           super(C, self).method()
>   '''
> 
>   Obviously the methods like the one below doesn't work "right";-)
>   '''
>   def super(self):
>       super(self.__class__, self)
>   class C:
>       def method(self):
>           super(self).method()
>   '''
> 
>   Is it possible that such a "super"(deducing class method declaration
>   context) could appear in Python?
>   (It seems to me that to implement a simple super something should be
>   done during "compilation" of class declaration.)
> 
> Best regards,
>  Kerim                          mailto:warkid at hotbox.ru

``super`` is one of the trickiest Python constructs. In 
http://www.python.org/2.2.3/descrintro.html Guido sketches
a metaclass solution which however is not quite satisfactory (for one,
it does not work with magic methods).

Some time ago I went to "fix" autosuper, but that required a major metaclass
hacking which was so deep that I have already forgotten what I did ;) 
Nevertheless, I have still the files around, and my test suite runs okay
(this only means that the bugs are smarter than me) so I think I will post
the code. If somebody uses it and finds an unexpected behavior, please
send me a note. If somebody wants his head to explode, please try to
understand what safetype does ;)

Here are two examples of usage:

# example1.py: the diamond diagram

from super import autosuper

class A(object):
    __metaclass__=autosuper
    def m(self):
        return "A"
class B(A):
    def m(self):
        return "B" + self.__super.m()
class C(A):
    def m(self):
        return "C" + self.__super.m()
class D(C, B):
    def m(self):
        return "D" + self.__super.m()

print D().m() 

this prints DCBA.

#example2.py

from super import autosuper

class A(str):
    __metaclass__=autosuper
    def __new__(cls):
        obj='A'+cls.__super.__new__(cls)
        print obj
        return obj
class B(A):
    def __new__(cls):
        obj="B" + cls.__super.__new__(cls)
        print obj
        return obj
class C(A):
    def __new__(cls):
        obj="C" + cls.__super.__new__(cls)
        print obj
        return obj
class D(C, B):
    def __new__(cls):
        obj="D" + cls.__super.__new__(cls)
        print obj
        return obj

D()

this prints 

A
BA
CBA
DCBA

Here is the module super.py:

# super.py

from safetype import safetype # deep magic to avoid metaclass conflicts

class _super(object):
    """Helper descriptor, called by the ``Enable__super`` metaclass which will
    take care of defining the ``__thisclass__`` attribute; it should not be 
    called directly, unless you really know what you are doing. Notice that 
    this ``_super`` is minimal, i.e. it does not define ``__new__``, 
    `` __init__`` or other special methods; this avoids the problems of the 
    standard ``super``."""
    def __get__(self,obj,klass):
        if obj is None: obj=klass
        return super(self.__thisclass__,obj)

class autosuper(safetype):
    """Cooperative safe metaclass which defines a private attribute ``__super``
    on its instances, containing a reference to the descriptor ``_super``. 
    This enable the cooperative syntax ``obj.__super.methodname`` as
    sugar for ``super(callingclass,obj).methodname``."""
    def __init__(cls,*args):
        super(autosuper,cls).__init__(*args)
        if len(args)==1 or args[0]=='superobject': return # do nothing
        strippedname=args[0].lstrip('_')
        # if the class name starts with underscores, they must
        # be stripped; this is how the mangling mechanism works
        sup=_super(); sup.__thisclass__=cls # trick to avoid __init__ in _super
        setattr(cls,'_%s__super' % strippedname,sup)

Here is the module safetype.py:

# safetype.py

"""Deep, **DEEP** magic to remove metaclass conflicts.

``safetype`` provides the ``safetype`` metaclass, the mother of conflict-free
metaclasses. The suggested import syntax for usage in other modules is

    from safetype import safetype as type

If you override ``__new__`` when you derive from ``safetype``,
you should do it cooperatively.

Example:

>>> from safetype import type

>>> class M(type):
...     def __new__(mcl,*args):
...         print 'creating a class from M'
...         return super(M,mcl).__new__(mcl,*args)

>>> class N(type):
...     def __new__(mcl,*args):
...         print 'creating a class from N'
...         return super(N,mcl).__new__(mcl,*args)

>>> class C:
...     __metaclass__=M
creating a class from M

>>> class D:
...     __metaclass__=N
creating a class from N

>>> class E(C,D):
...     pass
creating a class from M
creating a class from N

>>> E.__class__     #  automagically created
<class 'safetype.MN'>
>>> E.__metaclass__ #  inherited from C
<class 'M'>
"""

import  sys,sets,types,__builtin__

__type__=__builtin__.type
#the aboriginal 'type'; useful if you rebinds 'type' to 'safetype'

metadic={} # associates tuple of bases metaclasses to children metaclasses

class safetype(type):
    """Overrides the ``__new__`` method of the ``type`` metaclass, making the
    generation of classes conflict-proof."""
    # Seventeen lines of DENSE code!
    def __new__(mcl,*args):
        nargs=len(args)
        if nargs==1: # works as __builtin__.type
            return __type__(args[0]) 
        elif nargs==3: # creates the class using the appropriate metaclass
            n,b,d = args # name, bases and dictionary
            mb=map(__type__,b) # metaclasses of the bases
            meta=generatemetaclass([mcl,]+mb) # recursive
            if mcl is meta: # meta is trivial, dispatch to the default __new__
                return super(safetype,mcl).__new__(mcl,n,b,d)
            elif is_less_specific(mcl,mb): # dispatch to meta.__new__
                return meta.__new__(meta,n,b,d)
            else: # non-trivial metaclass, dispatch to the right __new__
                # (it will take a second round)
                return super(mcl,meta).__new__(meta,n,b,d)
        else:
            raise TypeError('%s() takes 1 or 3 arguments' % mcl.__name__)

def generatemetaclass(metas):
    """Given a sequence of metaclasses, removes redundances and, if needed,
    creates a new metaclass; returns the metaclass and updates the global
    dictionary.of metaclasses. If the metaclass is already in the dictionary,
    simply retrieves it."""
    
    metabases=remove_redundant(metas)# metas have the priority
    if metabases in metadic: # already generated metaclass
        return metadic[metabases]
    elif len(metabases)==1: # single metabase
        meta=metabases[0]
    else: # multiple metabases
        metaname=''.join([m.__name__ for m in metabases])
        meta=safetype(metaname,metabases,{}) 
    return metadic.setdefault(metabases,meta)

def is_less_specific(c,ls):
    "c is an ancestor of (at least) one class in the list ls."
    for C in ls:
        if issubclass(C,c) and C is not c: return True
    return False

def remove_redundant(bases):
    """Returns a tuple of non-redundant base classes.
    Given a sequence of base classes, a class is redundant if
    
    1. it is duplicated;
    2. it is implied by the others, i.e. it is an ancestor of at least one
       of the other classes;
    3. it is ClassType, the metaclass of old style classes.
       
    For instance, if ``C`` is derived from ``B``, in the
    sequence ``C,B`` the class ``B`` is redundant, since all its features are
    already provided by ``C``. Therefore ``B``
    is removed and ``remove_redundant`` returns the tuple ``(C,)``:

    >>> class B(object): pass
    ...
    >>> class C(B): pass
    ...
    >>> import safetype; safetype.remove_redundant([C,B])
    (<class 'C'>,)
    """
    redundant=sets.Set((types.ClassType,)) # old style metaclass
    ls=list(bases)
    for c in bases:
        if is_less_specific(c,ls) or c in redundant: 
            ls.remove(c) 
        else: # c is a redundant class to be removed if found
            redundant.add(c) 
    return tuple(ls)


From alan.gauld at btinternet.com  Thu Jan 22 03:02:13 2004
From: alan.gauld at btinternet.com (Alan Gauld)
Date: Thu, 22 Jan 2004 08:02:13 GMT
Subject: a curious IDLE Error
References: <8g7u001k257pr6tjl3ng9t7pn3gvbq2328@4ax.com>
	<CEELJPECNGEGKFNDLHFFGEBKCCAA.perry@stsci.edu>
	<mailman.533.1074574795.12720.python-list@python.org>
	<bumghc$dsb$1@nrc-news.nrc.ca>
	<vpmt0058gq2hj2q8jh8pakm9d80eridvmv@4ax.com>
	<mailman.617.1074727375.12720.python-list@python.org>
	<8g7u001k257pr6tjl3ng9t7pn3gvbq2328@4ax.com>
	<mailman.629.1074750632.12720.python-list@python.org>
Message-ID: <400f8315.60048965@news.blueyonder.co.uk>

On Wed, 21 Jan 2004 21:50:01 -0800, EP <EP at zomething.com> wrote:

> I opened a new Python shell from the instance of IDLE editor where my 
> module was open and tried the raw_input():
> 
>  >>> someFile=raw_input("enter:  ")
> Traceback (most recent call last):
>    File "<pyshell#36>", line 1, in ?
>      someFile=raw_input("enter:  ")
> TypeError: 'tuple' object is not callable
> 

This is a long shot but is it possible that you used raw_input as
the name of a variable somewhere. Thus you are trying to call
that variable (which apparently holds a tuple!).

Try doing a text search for raw_input in your module code.

Just a thought.

Alan G.
Author of the Learn to Program website
http://www.freenetpages.co.uk/hp/alan.gauld


From nomail at nospam.net  Mon Jan 12 10:55:42 2004
From: nomail at nospam.net (Olaf Meyer)
Date: Mon, 12 Jan 2004 15:55:42 GMT
Subject: building strings with variable input
In-Reply-To: <400273B8.E991F41D@alcyone.com>
References: <pduMb.6321$g4.137247@news2.nokia.com>
	<400273B8.E991F41D@alcyone.com>
Message-ID: <2szMb.6443$k4.143679@news1.nokia.com>

Erik Max Francis wrote:

> Olaf Meyer wrote:
> 
> 
>>Especially if you have a lot of variable input it makes it hard to
>>match
>>the variables to the proper fields. From other scripting languanges
>>I'm
>>used to something like:
>>
>>  $cmd = "$executable -start $startTime -end $endTime -dir $directory"
>>
>>This makes it very easy to see how the string is actually built. You
>>dont't have to worry where which variables go.
>>
>>Is there a similar way to do this in python?
> 
> 
> Sure:
> 
> cmd = "%(executable)s -start %(startTime)s -end %(endTime)s -dir
> %(directory)s" % locals()
> 
> There are also more expansive solutions such as YAPTU or EmPy.
> 
> Note, however, that what you are trying to do (presuming you're passing
> this to os.system or something similar) is potentially a serious
> security risk.  If the values of the strings you are constructing the
> command line are not fully trustworthy, they can be easily manipulated
> to make your program execute arbitrary shell commands.
> 

I just found out another way ;-) Using the locals() has the disadvantage 
that I cannot use more complex variable parameters (e.g. certain values 
of a dictionary). The following works well:

cmd = (executable + " -start " + startTime + " -end " + endTime +
        " -dir " + options.dir)

Olaf


From jeremy at zope.com  Mon Jan 12 11:26:06 2004
From: jeremy at zope.com (Jeremy Hylton)
Date: Mon, 12 Jan 2004 11:26:06 -0500
Subject: Databases: Which one's right for me?
In-Reply-To: <9a6d7d9d.0401120658.5b9ee522@posting.google.com>
References: <mailman.285.1073872919.12720.python-list@python.org>
	<9a6d7d9d.0401120658.5b9ee522@posting.google.com>
Message-ID: <1073924765.6341.387.camel@localhost.localdomain>

On Mon, 2004-01-12 at 09:58, Aaron Watters wrote:
> "Tim Peters" <tim.one at comcast.net> wrote in message news:<mailman.285.1073872919.12720.python-list at python.org>...
> > [Aaron Watters]
> > > Does zodb support the strictest isolation levels?
> >
> > I'm almost certain it doesn't, but I'm not a DB expert.  Please take this to
> > a ZODB list, as previously suggested.
> > 
> > > If so how?  If not what does it support exactly?
> > 
> > I pointed you to Jeremy's relevant blog entry last time...
> 
> Reading the blog it seems you are right.  I wish zodb would be
> a bit more careful in its claims.  When you say "zodb supports
> the ACID properties of transactions" this has a precise meaning
> which vanishes when you redefine all the letters.

Perhaps you could say something about which of the letters you think
we've redefined in a confusing way.  If you're talking about my blog
entry or the zodb programming guide, I wrote the definitions and the
text is simply my gloss on the what I thought the standard definitions
were.

Here's a definition of isolated from Gray & Reuter: "The property that
two transactions running in parallel have the illusion that there is no
concurrency.  It appears that the system runs one transaction at a
time.  So a transaction is isolated from the uncommitted updates of
others (so-called dirty data), and the transaction has repeatable
reads.  (See also degree 1 isolation, degree 2 isolation, degree 3
isolation.)"

In the programming guide, we say "Isolation means that two programs or
threads running in two different transactions cannot see each other's
changes until they commit their transactions."  That strikes me as
pretty consistent with the Gray & Reuter definition.

In my blog entry  (http://www.python.org/~jeremy/weblog/030514.html), I
get into the finer details using some terminology from Atul Adya's PhD
thesis.  The ANSI standard isolation levels don't work for optimistic
concurrency control, and Adya fleshes out some levels that makes sense
for optimism and looking.

>   In particular
> it suggests that zodb would be good for something like an
> accounting or banking application which would require strict
> transaction isolation (serializability).  The looser definition
> could lead to fairly unpleasant difficulties (law suits, jail time...).
> Sorry, had to complete my thought on clp.

Shane Hathaway posted a nice message about the isolation level supported
by zodb last spring.
http://mail.zope.org/pipermail/zodb-dev/2003-March/004684.html

ZODB does not support full serializability at the moment.  The current
stable release supports cursor stability and the new development release
of ZODB 3.3 + multi-version concurrency control will support snapshot
isolation.  The remaining obstacle to full serializability is write
skew.  I think we can address that problem, but it hasn't been a high
priority for ZC.

Jeremy





From francisgavila at yahoo.com  Thu Jan 15 14:16:33 2004
From: francisgavila at yahoo.com (Francis Avila)
Date: Thu, 15 Jan 2004 14:16:33 -0500
Subject: Tcl/Tk Support
References: <E1Af0F7-0003lB-L4@mail.python.org><20040109201513.GC2810@unpythonic.net>
	<mailman.406.1074188662.12720.python-list@python.org>
Message-ID: <100dpqk1421ohcd@corp.supernews.com>

Diego Ribeiro de Andrade wrote in message ...
>Yeah! It Works Thanks.
>
> Everyone else told me that It was native in Python. May I did something
>wrong in the installation of Red Hat9?

Distros often carve up the as-released packages into more managable chunks
for their own packages.  Suppose your machine didn't run X--then you'd be
complaining about how you had to install tkinter when you didn't need it. :)
FWIW, Debian also has tkinter in a separate package.
--
Francis Avila



From jjl at pobox.com  Fri Jan  9 15:11:08 2004
From: jjl at pobox.com (John J. Lee)
Date: 09 Jan 2004 20:11:08 +0000
Subject: Python and Jython are kinda different
References: <slrnbvsi8v.78r.ramen@lackingtalent.com> <87wu81jjg2.fsf@pobox.com>
	<slrnbvtlos.h2e.ramen@lackingtalent.com>
Message-ID: <8765fkrig3.fsf@pobox.com>

Dave Benjamin <ramen at lackingtalent.com> writes:

> In article <87wu81jjg2.fsf at pobox.com>, John J. Lee wrote:
> > Dave Benjamin <ramen at lackingtalent.com> writes:
> > [...]
> >> Is there anyone here that works on Jython? Do you need help? What kind of
> > 
> > They certainly need help.
> 
> I suppose that was a redundant question. =)

Yes, but it has been specifically noted by GvR (as well as the
Jythonistas) that Jython is lacking developers ATM.


> >> help do you need? What's your estimation of the amount of work needed? Is
> > 
> > Asking on the Jython list seems like a good idea.
> 
> Yes. But I think that c.l.p is an appropriate place to bring this issue up
> in general, because if CPython and Jython are truly--as they are often

Sure.  But the questions you asked can probably be best answered by
the core Jython people.


> represented in books and tutorials--just two implementations of the Python
> language, we all ought to be more concerned with unifying them. I never see
> Jython advertised as a limited subset of Python.

Well, it's *not* a limited subset of CPython 2.1 (apart from tiny
differences).

[...]
> > PyPy is a research effort, so not immediately useful.  It may have big
> > payoffs if successful, of course.
> 
> Well, my thinking is that, since it's an implementation of Python written in
> Python, many of the new features of CPython that don't require syntactical
> or fundamental object-model changes could be ported from PyPy to Jython as a
> temporary fix, to be eventually recoded in Java.

Library changes don't require PyPy, they already work (most of the
time) direct from CPython.  It's the fundamentals that take the work.
I'm not sure whether there's a third category, as you suggest.

I believe GvR said that PyPy might (might!) become a sort of
executable standard for Python in the future, though.


John


From sdeibel at wingide.com  Thu Jan 22 09:24:08 2004
From: sdeibel at wingide.com (Stephan Deibel)
Date: Thu, 22 Jan 2004 09:24:08 -0500 (EST)
Subject: a curious IDLE Error
In-Reply-To: <5.2.0.9.0.20040122011652.00b7ea80@mail.zomething.com>
Message-ID: <Pine.LNX.4.50.0401220922010.3123-100000@hedgehog>

On Thu, 22 Jan 2004, EP wrote:
> At 08:02 AM 1/22/2004 +0000, Alan Gauld wrote:
> >On Wed, 21 Jan 2004 21:50:01 -0800, EP <EP at zomething.com> wrote:
> >
> > > I opened a new Python shell from the instance of IDLE editor where my
> > > module was open and tried the raw_input():
> > >
> > >  >>> someFile=raw_input("enter:  ")
> > > Traceback (most recent call last):
> > >    File "<pyshell#36>", line 1, in ?
> > >      someFile=raw_input("enter:  ")
> > > TypeError: 'tuple' object is not callable
> > >
> >
> >This is a long shot but is it possible that you used raw_input as
> >the name of a variable somewhere. Thus you are trying to call
> >that variable (which apparently holds a tuple!).
> >
> >Try doing a text search for raw_input in your module code.
> >
> >Just a thought.
> 
> 
> I thought it might have been something like that as well, but I checked all 
> my variable names (and I was only importing the string module).
> 
> The strange behavior was that the module worked, just not in an IDLE shell 
> opened up out of the same instance I created the module in. 

I'm guessing too (sorry) but it may be that IDLE doesn't have support for
properly redirection reads on stdin to the shell?  This comes to mind only
because we had to write special code to make this happen properly in Wing
IDE.

Stephan Deibel

--
Wing IDE for Python
Archaeopteryx Software, Inc
Take Flight!

www.wingide.com



From llothar at web.de  Fri Jan 30 20:02:30 2004
From: llothar at web.de (Lothar Scholz)
Date: 30 Jan 2004 17:02:30 -0800
Subject: easiest transition for a PHP website to move to Python?
References: <mailman.1023.1075441969.12720.python-list@python.org>
	<6ee58e07.0401300555.12c07aa3@posting.google.com>
	<bvdvr6$96h$05$1@news.t-online.com>
Message-ID: <6ee58e07.0401301702.42c759f8@posting.google.com>

"Diez B. Roggisch" <deets_noospaam at web.de> wrote in message news:<bvdvr6$96h$05$1 at news.t-online.com>...

> Where exactly is zope not "real" python? Just because it features two
> templating-methods that are for good reasons _not_ python embedded into
> html, its still a python webapp server.

> I never used webware, so I can't compare both, but from what I see it
> appears to me like tomcat (or maybe jboss) the python way. No problem with
> that. But object-relational-mappers are a PITA if you _must_ use them. ZODB
> oth is much more of a object-orientied (not relational, though) database.
> And thats what I love about it - simply create objects, and save them,
> without the need for prior mapping to anything.

Read this

http://zope-is-evil-666.idyll.org/
http://www.amk.ca/python/writing/why-not-zope.html
http://pywx.idyll.org/advocacy/why-not-zope.html 

> 
> For purely content-driven websites, I haven't seen much better solutions
> than ZOPE together with some modern CMS, like PLONE or ZMS. 

Only, as mentionend in other texts, if it is for simple content. 
Otherwise the ZOPE restrictions are quite strong.


From jcarlson at nospam.uci.edu  Sat Jan 24 14:39:40 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Sat, 24 Jan 2004 11:39:40 -0800
Subject: pty difficulties
In-Reply-To: <2e262238.0401240912.1ca6bb74@posting.google.com>
References: <2e262238.0401232202.5b21eba8@posting.google.com>
	<butccm$2un$1@news.service.uci.edu>
	<2e262238.0401240912.1ca6bb74@posting.google.com>
Message-ID: <buuhpr$skr$1@news.service.uci.edu>

> I don't think checking for writeable status /should/ help because the
> write call I am using blocks.  So, if the stream isn't writeable, it
> should just block until it is.  I think.

Hrm.  Perhaps you should just leave the sleep in there.  One second 
seems a bit much, but maybe .01 or .001 seconds is sufficient.  You 
could reasonably still get 100K-1M/second.  One would hope that would be 
enough for most tasks.

  - Josiah


From sidharthk at hotmail.com  Mon Jan 26 04:01:16 2004
From: sidharthk at hotmail.com (Sidharthk)
Date: 26 Jan 2004 01:01:16 -0800
Subject: efficient updating of nested dictionaries
References: <H%_Qb.2609$925.1917@nwrddc02.gnilink.net>
Message-ID: <8d02ff63.0401260006.1b892fe8@posting.google.com>

omission9 <omission9 at invalid.email.info> wrote in message news:<H%_Qb.2609$925.1917 at nwrddc02.gnilink.net>...
> I have a dictionary that looks like this
> MY_DICT[KEY_X][KEY_Y][KEY_Z]=FOO
> 
> I am having a problem updating this with a simple 
> MY_DICT.update(NEW_DICT) as update doesn't seem to care about getting 
> into the inner dicts.
> Getting the keys of each and iterating through and updating each one is 
> terribly slow as the number of keys gets bigger and bigger.
> What is the bst way to update my nested dicts?

Use Tuples

MY_DICT[(KEY_X,KEY_Y,KEY_Z)]=FOO

Unless for some you need to use nested dicts :)


From newsgroups at jhrothjr.com  Fri Jan 23 19:18:23 2004
From: newsgroups at jhrothjr.com (John Roth)
Date: Fri, 23 Jan 2004 19:18:23 -0500
Subject: Various strings to dates.
References: <4GfQb.16187$AA6.14368@fed1read03>
Message-ID: <1013ef6ksfsmf16@news.supernews.com>


"Amy G" <amy-g-art at cox.net> wrote in message
news:4GfQb.16187$AA6.14368 at fed1read03...
> I have seen something about this beofore on this forum, but my google
search
> didn't come up with the answer I am looking for.
>
> I have a list of tuples.  Each tuple is in the following format:
>
> ("data", "moredata", "evenmoredata", "date string")
>
> The date string is my concern.  This is the date stamp from an email.
> The problem is that I have a whole bunch of variations when it comes to
the
> format that the date string is in.  For example I could have the following
> two tuples:
>
> ("data", "moredata", "evenmoredata", "Fri, 23 Jan 2004 00:06:15")
> ("data", "moredata", "evenmoredata", "Thursday, 22 January 2004 03:15:06")
>
> I know there is some way to use the date string from each of these to get
a
> date usable by python, but I cannot figure it out.
> I was trying to use time.strptime but have been unsuccesful thus far.
>
> Any help is appreciated.

This is what I use to parse dates of unknown provinance.
It's laughably overengineered, and I don't include the day
of the week or the time. Given your examples, though,
those should be easy enough to deal with.

HTH
John Roth

class DateContainer(object):
    _typeDict = {}
    _stringValue = ""
    _typeDict["stringValue"] = "String"
    _typeDict["value"] = "String"
    _value = ""
    year = 1
    month = 1
    day = 1
    bc = ""

    def _checkUserFriendlyDate(self, date):
        # The rules for a user friendly date are:
        # 1. The year must be at least three digits, including
        #    leading zeroes if necessary. Day and numeric month
        #    may be no longer than 2 digits.
        # 2. The month may be alphabetic or numeric. If it's
        #    alphabetic, it must be at least three letters long.
        # 3. The epoch may be ad, bc, bce or ce. If omitted, it's
        #    assumed to be ad.
        # 4. After removing the year, epoch and an alphabetic month,
        #    the remaining single piece is the day, or the piece that
        #    is greater than 12.
        # 5. If two pieces remain, the first is the month, the second
        #    is the day. Both are between 1 and 12, inclusive.
        partList = dateTimeParse(date)
        if not(2 < len(partList) < 5):
            raise ValueError, "incorrect part list: %s" % (partList,)
        bc = self._findBC(partList)
        if len(partList) != 3:
            return "too many components in date: '%s'" % date
        year = self._findYear(partList)
        month = self._findAlphaMonth(partList)
        if month != 0:
            day = partList[0]
        else:
            day = self._findDay(partList)
            if day:
                month = partList[0]
            else:
                month, day = partList
        year = self._checkNum(year, 4712)
        day = self._checkNum(day, 31)
        month = self._checkNum(month, 12)
        if bc in ("AD", "CE"):
            bc = ""
        self.year, self.month, self.day, self.bc = year, month, day, bc
        return True

    def _checkNum(self, num, limit):
        result = int(num)
        if result > limit:
            raise ValueError, "number '%s' out of range '%s'" % (num, limit)
        return result

    def _findBC(self, partList):
        for i in range(len(partList)):
            word = partList[i]
            if word in ("AD", "BC", "CE", "BCE"):
                del partList[i]
                return word
        # XXX if len(partList > 3): error
        return ""

    def _findYear(self, partList):
        for i in range(len(partList)):
            word = partList[i]
            if len(word) > 2 and word.isdigit():
                del partList[i]
                return word
        raise ValueError

    def _findAlphaMonth(self, partList):
        for i in range(len(partList)):
            word = partList[i]
            if word.isalpha():
                del partList[i]
                return ['JAN', 'FEB', 'MAR', 'APR', 'MAY', 'JUN',
                        'JUL', 'AUG', 'SEP', 'OCT', 'NOV',
'DEC'].index(word[:3]) + 1
        return 0

    def _findDay(self, partList):
        for i in range(len(partList)):
            word = partList[i]
            if word.isdigit() and int(word) > 12:
                del partList[i]
                return word
        return ""

    def _getStringValue(self):
        return self._stringValue

    def _setStringValue(self, value):
        self._checkUserFriendlyDate(value)
        self._stringValue = value

    _typeDict["stringValue"] = "String"
    stringValue = property(_getStringValue, _setStringValue,
                           doc="User Friendly Date")

    def _getValue(self):
        isoDate = "%04u-%02u-%02u %s" % (self.year, self.month, self.day,
self.bc)
        return isoDate.strip()

    def checkISODate(self, value):
        year = self._checkNum(value[:4], 4712)
        month = self._checkNum(value[5:7], 12)
        day = self._checkNum(value[8:10], 31)
        if len(value) > 10:
            bc = value[11:]
            if not (bc.upper() in ("AD", "BC", "BCE", "CE")):
                raise ValueError
        if bc in ("AD", "CE"):
            bc = ""
        self.year, self.month, self.day, self.bc = year, month, day, bc
        return

    def _setValue(self, value):
        self._checkISODate(value)
        isoDate = "%04u-%02u-%02u %s" % (self.year, self.month, self.day,
self.bc)
        self.stringValue = isoDate
        return None

    value = property(_getValue, _setValue,
                     doc = "ISO Standard Format Date")
>
>




From crawley.storm.nonononoemail at ntlworld.com  Sat Jan 31 17:31:57 2004
From: crawley.storm.nonononoemail at ntlworld.com (Crawley)
Date: Sat, 31 Jan 2004 22:31:57 +0000
Subject: win32com support
References: <Xns947FEAF73D102crawleystormntlworld@217.158.240.24>
	<bveqqb$1fue$1@arachne.labyrinth.net.au>
	<Xns94817485CEFF0crawleystormntlworld@217.158.240.23>
	<bvh9f0$1gej$1@arachne.labyrinth.net.au>
Message-ID: <Xns9481E62B92C92crawleystormntlworld@195.8.68.206>

Mark Hammond <mhammond at skippinet.com.au> wrote in
news:bvh9f0$1gej$1 at arachne.labyrinth.net.au: 

> Generally, you can do a QueryInterface for the object.  However, if
> the object does not support IDispatch, you will haver trouble - we
> don't support arbitrary interfaces when calling them, only
> implementing them. 
> 
> ob = ob._obj_.QueryInterface(
> 

I take it the chances of this working are slim to none ?

> 
> The GUID must be for a type library.  If you run "makepy.py -i", then 
> you will get a list of all valid typelibs you can use, and the params 
> for it.
> 

Bum!

Perhaps I should look at implementing the actual addin in C++ and then 
embed python into it so that most the work can be done by that.  

Thanks for your help anyway

Rich


From swalters_usenet at yahoo.com  Sun Jan 11 03:10:50 2004
From: swalters_usenet at yahoo.com (Samuel Walters)
Date: Sun, 11 Jan 2004 08:10:50 GMT
Subject: help with Python Environment For Blind User
References: <tH2Mb.6292$EL4.3998@nwrddc02.gnilink.net>
Message-ID: <pan.2004.01.11.08.09.29.483340@yahoo.com>

I had a blind friend who swore by vim.  It integrated well with his text
to speech converter as well as his braille terminal, and provided him lots
of facilities to figure out where exactly he was in a file.

In fact, poking around in the source, I see that there's several files
related to braille encodings and terminals.

Look into it.  vim can be hard to learn at first, but it may pay off for
you in the end.  It's a very powerful program, and could make many tools
easier for you to use.

Sam Walters


From jcarlson at nospam.uci.edu  Fri Jan 30 17:48:30 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Fri, 30 Jan 2004 14:48:30 -0800
Subject: python in dreamweaver
In-Reply-To: <bvem9h$j3a$1@news-reader5.wanadoo.fr>
References: <d99e1341.0401271818.625d5ef2@posting.google.com>
	<bv86nc$rto$2@news-reader4.wanadoo.fr>
	<d99e1341.0401291857.6deabb3d@posting.google.com>
	<bvem9h$j3a$1@news-reader5.wanadoo.fr>
Message-ID: <bven43$gcc$1@news.service.uci.edu>

Michel Claveau/Hamster wrote:

> Hi !
> 
> I prepare "template" pages with DM ; in "strategic" position (where i think
> put infos later), i put a key-word ; then i save the page.
> My web-server (in Python) read the HTML-Page, do multiple search/replace
> (key-words by data), then send the page.

It would be significantly more Pythonic to have a template similar to 
the following:

template  = '''
<html>
<head>
<title>%(title)s</title>
</head>
<body>
<!-- Insert your HTML mojo here -->
%(menu)s
%(body)s
</body>
</html>
'''

output = template%{'title':"this is the title of the web page",
                    'menu':"this is the menu",
                    'body':"this is the body"}

  - Josiah


From gerrit at nl.linux.org  Mon Jan 19 15:29:33 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Mon, 19 Jan 2004 21:29:33 +0100
Subject: Escaping slashes (double backslash plague)
In-Reply-To: <400C359B.58CCB134@engcorp.com>
References: <mailman.500.1074516185.12720.python-list@python.org>
	<400C359B.58CCB134@engcorp.com>
Message-ID: <20040119202933.GA10765@nl.linux.org>

Peter Hansen wrote:
> If so, give up: it's not possible.  File names cannot contain a
> forward slash, at least on most any operating system which uses slashes
> as path separators. (*)

> (*) Examples to the contrary, while perhaps interesting, notwithstanding...

There is (was?) a bug in I think NFS or SMBFS which allowed the creation
of a file with a '/' in it. I heard of someone which had a very tough
time in removing it again ;-)

open(''.join([chr(i) for i in range(1, 256) if chr(i) != '/']), 'w')-ly y'rs - Gerrit

-- 
254. If he take the seed-corn for himself, and do not use the yoke of
oxen, he shall compensate him for the amount of the seed-corn.
          -- 1780 BC, Hammurabi, Code of Law
-- 
PrePEP: Builtin path type
    http://people.nl.linux.org/~gerrit/creaties/path/pep-xxxx.html
Asperger's Syndrome - a personal approach:
	http://people.nl.linux.org/~gerrit/english/



From christian.aastorp.slett.spam at siemens.no.invalid  Fri Jan  9 04:20:06 2004
From: christian.aastorp.slett.spam at siemens.no.invalid (Christian Aastorp)
Date: Fri, 09 Jan 2004 10:20:06 +0100
Subject: books
References: <3FFDC029.AB0A4097@unet.univie.ac.at>
Message-ID: <ngssvvsfajb3v6cb1egr7k3tr631iofu1e@4ax.com>

On Thu, 08 Jan 2004 20:40:08 GMT, Thomas Mang
<a9804814 at unet.univie.ac.at> wrote:

>Hello,
>
>I have programmed mostly in C++ lately, and I want to start learning
>Python now.
>
>Which books would you recommend to buy?
>
>I am both looking for an introduction into the language, as well as
>complete guides.

To learn how to think in Python I think the Python Cookbook is very
valuable.


From jzgoda at gazeta.usun.pl  Mon Jan 26 16:16:42 2004
From: jzgoda at gazeta.usun.pl (Jarek Zgoda)
Date: Mon, 26 Jan 2004 21:16:42 +0000 (UTC)
Subject: wxpython and wxlocale
References: <bv3ur6$bm1$1@news.ya.com>
Message-ID: <bv403p$3ot$1@atlantis.news.tpi.pl>

Ya <tmartinez at ammsoft.com> pisze:

> Is there any way of telling python that the text of the dialogues is in a
> specific language?
> And in affirmative case. How is it made? since all the attempts have been
> useless.
> I think that wxLocale has to be used, but I do not become clear.

loc = wx.Locale()
loc.Init(wx.LANGUAGE_POLISH)

Et voila, your program uses Polish dialogs.

-- 
Jarek Zgoda
Unregistered Linux User #-1
http://www.zgoda.biz/ JID:zgoda-a-chrome.pl http://zgoda.jogger.pl/


From guido.schimmels at freenet.de  Tue Jan 13 18:25:11 2004
From: guido.schimmels at freenet.de (Guido Schimmels)
Date: Wed, 14 Jan 2004 01:25:11 +0200
Subject: id3v2 module
References: <pan.2004.01.13.09.12.39.813880@beeznest.NOSPAM.net>
	<pan.2004.01.13.20.14.20.783863@freenet.de>
	<bu1mtf$nm$1@atlantis.news.tpi.pl>
Message-ID: <pan.2004.01.13.23.25.10.620142@freenet.de>

Am Tue, 13 Jan 2004 21:11:11 +0000 schrieb Jarek Zgoda:

> Guido Schimmels <guido.schimmels at freenet.de> pisze:
> 
>>> I'd like to know if there is a third-party module for reading/writing
>>> id3v2 informations.
>>> Thanks
>> 
>> http://id3-py.sourceforge.net/
> 
> This one is able to read and write only ID3v1.1 tags.

O, sorry. Maybe this is what you are looking for then:
http://tunetagger.sourceforge.net/snapshots/


From peter at engcorp.com  Fri Jan 16 09:23:05 2004
From: peter at engcorp.com (Peter Hansen)
Date: Fri, 16 Jan 2004 09:23:05 -0500
Subject: Binary strings, unicode and encodings
References: <265368cb.0401151138.37a3a47b@posting.google.com>
	<4006F13C.7D432B98@engcorp.com>
	<265368cb.0401151424.3cd7ede6@posting.google.com>
Message-ID: <4007F3C9.7BB853A2@engcorp.com>

Laurent Therond wrote:
> 
> I forgot to ask something else...
> 
> If a client and a server run on locales/platforms that use different
> encodings, they are bound to wrongly interpret string bytes. Correct?

Since the byte strings are by definition *encoded* forms of the Unicode
data, they definitely need to have a shared frame of reference or they
will misinterpret the data, as you surmise.  You can't decode something
if you don't know how it was encoded.

-Peter


From markus_wankus at hotmail.com  Thu Jan 29 15:12:44 2004
From: markus_wankus at hotmail.com (Markus Wankus)
Date: Thu, 29 Jan 2004 15:12:44 -0500
Subject: win32com - .ocx won't Dispatch...
References: <mailman.962.1075345407.12720.python-list@python.org>
Message-ID: <opr2jzrigx8cxiwf@news.packetworks.net>

Open the gen_py'd file 8AA34F82-95C9-11D3-8EB6-00C0DF2247CAx0x3x5.py, and 
do some searching.  You should be able to find an obvious main class 
related to what you are doing (I'm not sure what the .tlb is), and it will 
say in the comment or docstring that it is a "<foo>.<bar>", or whatever.  
That will be what you need to Dispatch.  The other option is to use the 
OLEView tool tiwth MSVC, and look at your EDRE Utility Control.  It will 
say in there somewhere...

Markus.

On Wed, 28 Jan 2004 19:04:22 -0800, RJ <rays at san.rr.com> wrote:

> Hi,
> I've been going over the Quick Start to Client side COM and Python and 
> many other sources, but cannot find an example that will get my 
> com/ActiveX .ocx USB device driver imported.
>
> The Excel and Word examples run fine.
> win32com.client.Dispatch("Excel.Application") etc., but how does one 
> know the ("<foo>.<bar>") to type in? Excel looks only vaguely like 
> "Excel.Application" in the com browser.
>
> Firstly, I found the ocx from the Python Object Browser.
> I ran makepy.py on EDREUtlX.ocx (USB device driver) which created
> 8AA34F82-95C9-11D3-8EB6-00C0DF2247CAx0x3x5.py
> etc. in gen_py\,
> but, I cannot find a syntax to get Dispatch to accept it...
>
> from win32com.client import Dispatch
> # failed attempts
> Dispatch("EDRE Utility Control") # name in browser
> Dispatch('{8AA34F82-95C9-11D3-8EB6-00C0DF2247CAx0x3x5}')
> Dispatch('{8AA34F82-95C9-11D3-8EB6-00C0DF2247CA}')
> Dispatch("8AA34F82-95C9-11D3-8EB6-00C0DF2247CA")
> Dispatch("8AA34F82-95C9-11D3-8EB6-00C0DF2247CAx0x3x5")
>
> all return:
> Traceback (most recent call last):
>    File "<stdin>", line 1, in ?
>    File "C:\Python23\lib\site-packages\win32com\client\__init__.py", 
> line 95, in Dispatch
>      dispatch, userName = 
> dynamic._GetGoodDispatchAndUserName(dispatch,userName,clsctx)
>    File "C:\Python23\lib\site-packages\win32com\client\dynamic.py", line 
> 84, in _GetGoodDispatchAndUserName
>      return (_GetGoodDispatch(IDispatch, clsctx), userName)
>    File "C:\Python23\lib\site-packages\win32com\client\dynamic.py", line 
> 72, in _GetGoodDispatch
>      IDispatch = pythoncom.CoCreateInstance(IDispatch, None, clsctx, 
> pythoncom.IID_IDispatch)
> pywintypes.com_error: (-2147221005, 'Invalid class string', None, None)
>
> So, what is the required syntax?
>
> Thanks,
> Ray
>
>



-- 
--
Markus


From bucodi_no_spam at ahoo.fr  Tue Jan 13 12:28:13 2004
From: bucodi_no_spam at ahoo.fr (Rony)
Date: Tue, 13 Jan 2004 18:28:13 +0100
Subject: Does anyone else not find the fun in programming...?
References: <d232c5e.0401130823.27fd26ff@posting.google.com>
Message-ID: <bu19ho$j0n$1@news-reader2.wanadoo.fr>

Group : comp.lang.python

> I find python very effective as a language and can generally project
> most of my hazy thoughts into it. But FUN !!! This is work dammit,
> I have now ground my teeth down from the number of times I read that
> programming is fun. Football (association) is fun, walking along
> canals is fun, Arguing about quite how useless the British Government
> is fun but programming  ?
> 
> Do I need help ?
> 
> (Actually typing this was quite fun, so perhaps)

Well I agree...
Meeting people, having a drink with them, sex.. is fun

Programming is just a job

Rony
-- 
Rony

  /_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/
 /   bucodi_no_spam at yahoo.fr (delete _no_spam)
/
|    www.bucodi.com - My work
\    www.ifrance/karamusic  -- My hobby
 \_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/




From crap at crud.com  Tue Jan 13 13:54:27 2004
From: crap at crud.com (Moosebumps)
Date: Tue, 13 Jan 2004 18:54:27 GMT
Subject: System calls over network
References: <ed58f15a.0401130950.237a0ea1@posting.google.com>
Message-ID: <D9XMb.482$Jx.107@newssvr29.news.prodigy.com>

Windows "at" command, or soon.exe which you can download from the Microsoft
website.  do a google search on those.  I had the exact same question.

MB

"Gabriel Leblanc" <gabriel.leblanc at a2m.com> wrote in message
news:ed58f15a.0401130950.237a0ea1 at posting.google.com...
> Hello,
>
> I am wondering if there's an easy way to do a system call to a file
> that resides on the network.  Say for example I would like to call the
> batch file which is located at
>
> \\ComputerName\file.bat
>
> I tried :
>
> >>> import os
> >>> os.popen("\\ComputerName\file.bat")
> <open file '\ComputerName\file.bat', mode 'r' at 0x007E7760>
> >>> os.popen("\\\\ComputerName\\file.bat")
> <open file '\\ComputerName\install.bat', mode 'r' at 0x007E7B20>
>
> Of course, I replaced ComputerName and file.bat with the correct
> paths.
>
> Any idea ?
>
> Thanks !




From tcdelaney at optusnet.com.au  Sat Jan 10 07:29:38 2004
From: tcdelaney at optusnet.com.au (Tim Delaney)
Date: Sat, 10 Jan 2004 23:29:38 +1100
Subject: Straw poll on Python performance (was Re: Python is far from a
	top performer ...)
References: <ryELb.238$tK2.228@amstwist00>
	<3fff234a$0$129$e4fe514c@dreader3.news.xs4all.nl>
	<3FFF26A1.943DEA84@engcorp.com>
Message-ID: <3ffff033$0$26117$afc38c87@news.optusnet.com.au>

From: "Peter Hansen" <peter at engcorp.com>

> This is my "straw poll" question:
>
>   Do you spend a "significant" amount of time actually optimizing your
>   Python applications?  (Significant is here defined as "more than five
>   percent of your time", which is for example two hours a week in a
>   40-hour work week.)

I have to say that I do, but I'm also dealing with datasets up to about
500MB in the worst case - but about 10-20MB in the normal case.

In most cases, the optimisations are things like only doing a single pass
over any file, etc. A naive prototype often doesn't scale well when I need
to deal with large datasets. Often using psyco will be sufficient to get me
over the hurdle (see the psyco thread) but sometimes not.

Tim Delaney




From sdeibel at wingide.com  Wed Jan 28 13:39:27 2004
From: sdeibel at wingide.com (Stephan Deibel)
Date: Wed, 28 Jan 2004 13:39:27 -0500 (EST)
Subject: Cross Platform Browser Launcher
In-Reply-To: <490316A24CC5D411ACD700B0D078F7F003915E28@cseexch01.cse.creoscitex.com>
Message-ID: <Pine.LNX.4.50.0401281115160.3100-100000@hedgehog>

Hi,

On Wed, 28 Jan 2004, Pieter Claerhout wrote:
> Take a look at the webbrowser module...
> http://www.python.org/doc/current/lib/module-webbrowser.html

I submitted a patched webbrowser module with substantial improvements
a while back.  I'm hoping this can make it into Python 2.4 so please
try it out:

http://python.org/sf/728278

Thanks!

Stephan Deibel

--
Wing IDE for Python
Archaeopteryx Software, Inc
Take Flight!

www.wingide.com

> 
> Cheers,
> 
> 
> pieter
> 
> Creo
> pieter claerhout | product support prinergy | tel: +32 2 352 2511 |
> pieter.claerhout at creo.com | www.creo.com
> 
> IMAGINE CREATE BELIEVE(tm)
> 
> 
> -----Original Message-----
> From: michael at foord.net [mailto:michael at foord.net] 
> Sent: 28 January 2004 10:18
> To: python-list at python.org
> Subject: Cross Platform Browser Launcher
> 
> 
> I've written a simple application in python with an HTML help file.
> 
> I'm looking for a cross platform way of launching the help file.
> 
> On windows I'd use :
> os.system('start help.html')
> 
> Which automatically opens the file with the users browser.
> 
> Is there a cross-platform way of doing the same thing ? 
> I can do a platform test and use different techniques for different
> systems - but I don't know how to achieve the same effect on a Linux
> (Unix ? Mac ?) machine.....
> 
> Any help appreciated.
> 
> Fuzzy
> 
> --
> 
> 
> http://www.Voidspace.org.uk The Place where headspace meets
> cyberspace. Online resource site - covering science, technology,
> computing, cyberpunk, psychology, spirituality, fiction and more.
> 
> --- 
> 
> http://www.voidspace.org.uk/atlantibots/pythonutils.html
> Python functions - home of dateutils, ConfigObj, StandOut, CGI-News
> and more....
> 
> --
> 
> Everyone has talent. What is rare is the courage to follow talent
> to the dark place where it leads. -Erica Jong
> Ambition is a poor excuse for not having sense enough to be lazy.
>         -Milan Kundera
> -- 
> http://mail.python.org/mailman/listinfo/python-list
> 
> 
> 



From me at privacy.net  Mon Jan 26 04:39:09 2004
From: me at privacy.net (Duncan Booth)
Date: 26 Jan 2004 09:39:09 GMT
Subject: efficient updating of nested dictionaries
References: <H%_Qb.2609$925.1917@nwrddc02.gnilink.net>
	<mailman.786.1075088534.12720.python-list@python.org>
	<bv2e21$j5e$2@news.service.uci.edu>
Message-ID: <Xns947C62217CA69duncanrcpcouk@127.0.0.1>

Josiah Carlson <jcarlson at nospam.uci.edu> wrote in 
news:bv2e21$j5e$2 at news.service.uci.edu:

>> Although, that's probably kind of lame - I bet others will have much
>> better suggestions. I'm interested in how other people do this too.
>> Rich
> 
> String concatenation is not that lame, but I'd use tuples:
> MY_DICT[(KEY_X, KEY_Y, KEY_Z)] = FOO
> 
> Tuples save on string operations.

I would omit the extra parentheses here, but its a style thing.

   MY_DICT[KEY_X, KEY_Y, KEY_Z] = FOO

(Note to original poster: I'd also turn off caps-lock)


From cmichaelbeck at hotmail.com  Wed Jan 28 12:56:27 2004
From: cmichaelbeck at hotmail.com (mike beck)
Date: 28 Jan 2004 09:56:27 -0800
Subject: Nested lists or conditional logic?
Message-ID: <ead93a6.0401280956.41fd4193@posting.google.com>

this is not all complex, but as a noob i'm having a hard time getting
my head around it.

i have a list of items. i need to print the items in batches of x,
with a summary line after each complete or partial batch, and a total
line at the end of the job.

if the list looks like ['line1','line2','line3'], and my ITEMSINBATCH
= 1, the output should look like this:

line1
---summary line---
line2
---summary line---
line3
---summary line---
---total line---

if ITEMSINBATCH = 2, the output should look like this:

line1
line2
---summary line---
line3
---summary line---
---total line---

i've done the following, which works, but it seems like there must be
a better/simpler/faster way to do this with nested loops. ideas?


# ---------------------Begin code---------------------
ITEMSINBATCH = 1;
ARBITRARYNUM = 51;

# create a list to work with
myList = ['1']*ARBITRARYNUM;

for i in range( len(myList) ):
    # avoid starting at 0
    count = i + 1;
    
    print "The item is:",myList[i],'\t',count;
    
    # ensure that the batch summary line is printed every ITEMSINBATCH
    # times but not if the number of items is evenly divisible by 
    # ITEMSINBATCH, in which case both the inner print and the outer 
    # print would execute and we'd get consecutive batch summary lines
    if ( (count) % ITEMSINBATCH ) is 0 and count != len(myList)::
        print "-----Add batch summary line-----";

# add a final batch line for those trailing items
print "------Add batch summary line------And BTW, i is", count;    

# and add the final summary line
print "------Add file summary------";

# ---------------------End code---------------------

TIA,
mike


From klapotec at chello.at  Fri Jan 16 04:25:39 2004
From: klapotec at chello.at (Christopher Koppler)
Date: Fri, 16 Jan 2004 09:25:39 GMT
Subject: data structures module
References: <92c59a2c.0401152306.1c6a17f5@posting.google.com>
Message-ID: <0bbf00pbp7a4ng7ljpd752kr4v4r21kq7v@4ax.com>

On 15 Jan 2004 23:06:44 -0800, jcb at iteris.com (MetalOne) wrote:

>I am fairly new to Python.
>Today, I wanted a priority queue.
>I notice that Python does not have any sorted lists.

The standard library has modules Queue and bisect - go look them up in
the docs (online:
http://www.python.org/doc/current/lib/module-Queue.html and
http://www.python.org/doc/current/lib/module-bisect.html ). These
should be what you're looking for.


--
Christopher


From robin at jessikat.fsnet.co.uk  Mon Jan 12 07:49:18 2004
From: robin at jessikat.fsnet.co.uk (Robin Becker)
Date: Mon, 12 Jan 2004 12:49:18 +0000
Subject: Division oddity
References: <ssn3009029rrug3l8dk1pn06tqd019ucld@4ax.com>
	<7xeku5vrn8.fsf@ruckus.brouhaha.com>
	<My1CLVAiZmAAFw5r@jessikat.fsnet.co.uk>
	<7xbrp9h4xs.fsf@ruckus.brouhaha.com>
Message-ID: <N9uy4LAOfpAAFwJH@jessikat.fsnet.co.uk>

In article <7xbrp9h4xs.fsf at ruckus.brouhaha.com>, Paul Rubin <http@?.cx>
writes
>Robin Becker <robin at jessikat.fsnet.co.uk> writes:
>> Python 2.3.2 (#49, Oct  2 2003, 20:02:00) [MSC v.1200 32 bit (Intel)] on
>> win32
>> Type "help", "copyright", "credits" or "license" for more information.
>> >>> from __future__ import division
>> >>> eval('1/2')
>> 0.5
>> >>>
>> 
I guess I'm 'broken' :)
-- 
Robin Becker


From francisgavila at yahoo.com  Mon Jan 19 22:53:47 2004
From: francisgavila at yahoo.com (Francis Avila)
Date: Mon, 19 Jan 2004 22:53:47 -0500
Subject: speedy Python strings?
References: <buhtjb$ida$1@news.rz.uni-karlsruhe.de>
	<pan.2004.01.20.03.02.31.383045@bmsi.com>
Message-ID: <100p9kl96uri9e1@corp.supernews.com>

Stuart D. Gathman wrote in message ...
>#         text = struct.unpack("L", self.buffer[:4])
>#         self.buffer = self.buffer[4:]
>   pos = self.pos
>   text = struct.unpack("L", self.buffer[pos:pos+4])
>   self.pos = pos + 4


In this vein, I would also recommend looking at the array module.  You
didn't describe the data structure, but if each record is simply a list of
4-byte integers, you could convert the whole record to ints at once like so:

record = array.array('L', stringorlist)
Then, perform your loops on record, which will be a list-like object
supporting item insertion and deletion, and conversion to bytestrings and
other Python base types.

Or, you could simply use array.array() to implement your buffer more
efficiently than continually calling struct.  Simply buffer the converted
data a chunk at a time, using array.

However, I don't think buffering helps much in this case.  File operations
are already buffered by Python, and most (all?) OSes buffer reads
themselves, too.  Reading a file is almost always very fast.  I would
concentrate more on presenting a useful abstraction for your data, rather
than worrying about what is essentially an optimization problem.
--
Francis Avila



From HAALrvanderhWEG at xs4all.nl  Thu Jan 22 09:41:49 2004
From: HAALrvanderhWEG at xs4all.nl (Rik van der Helm)
Date: Thu, 22 Jan 2004 15:41:49 +0100
Subject: newbie,cgi,os.system,cdrecord
References: <400fe08c$0$326$e4fe514c@news.xs4all.nl>
Message-ID: <400fe106$0$326$e4fe514c@news.xs4all.nl>

Rik van der Helm wrote:

> but I get an 'Internal Server Error' of Python
I meant Apache !




From peter at engcorp.com  Tue Jan 20 11:46:00 2004
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 20 Jan 2004 11:46:00 -0500
Subject: Delayed evaluation and setdefault()
References: <buh6j1$bub$1@news.tudelft.nl> <400C25FF.A76B1FEA@engcorp.com>
	<buhchh$43f$1@panix1.panix.com>
Message-ID: <400D5B48.9F69A788@engcorp.com>

Aahz wrote:
> 
> In article <400C25FF.A76B1FEA at engcorp.com>,
> Peter Hansen  <peter at engcorp.com> wrote:
> >Leo Breebaart wrote:
> >>
> >>    >>> d.setdefault('foo', b())
> >> then b() *does* get executed regardless of whether or not the
> >> value it returns is actually used ('foo' was not found) or not
> >> ('foo' was found).
> >>
> >> So I guess my question is twofold: one, do people think
> >> differently, and if so why?; and two: is there any elegant (or
> >> other) way in which I can achieve the delayed evaluation I desire
> >> for setdefault, given a side-effect-having b()?
> >
> >def lazysetdefault(dict, key, ref):
> >    if not dict.has_key(key):
> >        dict[key] = ref()
> >    return dict[key]
> 
> First of all, Peter made a boo-boo in naming a parameter ``dict``.

Oops...  I was, uh, writing pseudo-code, not Python!  Yeah, that's it...

-but-at-least-it-would-have-executed-ly yr's,
 Peter


From tjreedy at udel.edu  Fri Jan  9 21:25:02 2004
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 9 Jan 2004 21:25:02 -0500
Subject: displaying extended ASCII from a telnet session
References: <mailman.229.1073667874.12720.python-list@python.org>
Message-ID: <FaidnZbYvYXr_2Ki4p2dnA@comcast.com>


"Christian Wilcox" <cwilcox at etcconnect.com> wrote in message
news:mailman.229.1073667874.12720.python-list at python.org...
>I'm trying to programmatically access information from a telnet session
which is >normally accessed with a telnet program capable of terminal
emulation (currently set at >VT320).  The initial login text displays fine,
of course, but when I get to the section >which displays extended ASCII
characters, Telnet from telnetlib displays the following >garbled mess:

There may or may not be any 'extended' chars, but there are 'undisplayable'
chars, signaled by most of the '?'s (although a few might be real).
The '?' before '[' is the Escape char (what the Esc key on upper left
generates.).  What follows are VTxxx escape sequences, which often start
with <esc>[.

>?[?40h?[?3l?[0;1m?>?[?1l?[?25l?[?3l?[0;0H?[2J?[?25l?(B??[0;7m?[23B ba6.0
version 03-1993/R1 ?[0m?[0;
.....
>Any ideas of a way to decode this information?

Since the escape sequences are about visual formating and not about
content, you probably do not need to as long as you can recognize and
discard what for you may really be noise.  To make it easier, you might be
able to the the system that you are a really dumb pre-VT100 terminal that
only understands control chars and not the newer (as of about 2 decades
ago) control sequences.  On *nix, this might just mean resetting the TERM
environment variable.  But some programs might only talk to clients that
are VT100 capable.

Another route entirely.  Terminal and telnet programs often have a script
capability with commands like "when you receive 'sometext', send 'mytext'"
and others to turn saving to a disk file on and off.

Or, if you can install programs on the target, perhaps you can get at the
info directly withoug virtual screen scraping and just email yourself a
file in the format you want.

Terry J. Reedy




From computer.problemen at skynet.be  Sat Jan 10 14:26:26 2004
From: computer.problemen at skynet.be (broebel)
Date: Sat, 10 Jan 2004 20:26:26 +0100
Subject: solving a small programm
References: <40004254$0$16669$ba620e4c@news.skynet.be>
	<7xfzen3ayb.fsf@ruckus.brouhaha.com>
Message-ID: <40005e17$0$6084$ba620e4c@news.skynet.be>

If you look at this as a homework or not is of no interest to me but I like
the way you explained which way to go to find the resolution.
thanks (i solved it in a jiffy now)

"Paul Rubin" <http://phr.cx at NOSPAM.invalid> schreef in bericht
news:7xfzen3ayb.fsf at ruckus.brouhaha.com...
> That sounds like a homework problem, so rather than write the code for
> you, here's a hint -- use another variable, and update it every time
> you decide how many coins of any specific size you'll use.




From tdelaney at avaya.com  Wed Jan 28 18:13:09 2004
From: tdelaney at avaya.com (Delaney, Timothy C (Timothy))
Date: Thu, 29 Jan 2004 10:13:09 +1100
Subject: comparing booleans
Message-ID: <338366A6D2E2CA4C9DAEAE652E12A1DE011DB0AE@au3010avexu1.global.avaya.com>

> From: Gerrit Holl
> 
> is it proper to compare booleans? It is possible, of course, because
> they're compatible with numbers, but booleans aren't truly 
> numbers.

Actually, they *are* really numbers ...

    >>> isinstance(True, int)
    True
    >>> isinstance(False, int)
    True
    >>> True == 1
    True
    >>> False == 0
    True
    >>> True == 2
    False

Note the last case - you can't just compare any true value with True and expect that the comparison will compare True - it must explicitly equal 1 (or True). Likewise with False.

However, if `extends` is definitely boolean in your example, then it's perfectly reasonable to do:

    return cmp(self.extends, other.extends)

if you want False to be considered less than True.

Tim Delaney



From bwglitch at hotpop.com  Thu Jan 22 17:49:54 2004
From: bwglitch at hotpop.com (BW Glitch)
Date: Thu, 22 Jan 2004 17:49:54 -0500
Subject: Ordered dictionary?
In-Reply-To: <09XPb.234$af7.167008@newshog.newsread.com>
References: <leWPb.231$af7.162835@newshog.newsread.com>
	<bupbro$r38$1@news.service.uci.edu>
	<09XPb.234$af7.167008@newshog.newsread.com>
Message-ID: <bupgg8$kqsfk$1@ID-203388.news.uni-berlin.de>

Leif K-Brooks wrote:

> Josiah Carlson wrote:
> 
>>> I need to associate a string (key) with an integer (value). A 
>>> dictionary would do the job, except for the fact that it must be 
>>> ordered. I also need to look up the value for a specific key easily, 
>>> so a list of tuples wouldn't work.
>>
>>
>>
>> How must the dictionary be ordered?  Do you need the keys or the 
>> values sorted?
> 
> 
> Sorry for not making that clear, I need it sorted by the order of 
> insertion. Looks like 
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/107747 might do 
> what I want...

That should do. Looks promising, but I think it uses the old style of 
extending the dictionary (Not that it's bad) ...

-- 
Glitch

http://andres980.tripod.com/

One good shot is worth a hundred bad ones!
         -- Big Shot (G1)


From randall at tnr.cc  Fri Jan  2 16:30:11 2004
From: randall at tnr.cc (Randall Smith)
Date: Fri, 02 Jan 2004 21:30:11 GMT
Subject: how to import a module dynamically
In-Reply-To: <3ff5dc88$0$318$e4fe514c@news.xs4all.nl>
References: <fWkJb.29708$xU1.18377@fe1.texas.rr.com>
	<3ff5dc88$0$318$e4fe514c@news.xs4all.nl>
Message-ID: <DplJb.29714$xU1.10267@fe1.texas.rr.com>

Irmen de Jong wrote:
> Randall Smith wrote:
> 
>> How do I import a module when given the module name as input?
> 
> 
> 
>> import modname
> 
> 
> exec "import "+your_module_name
> 
> 
>> from modname import *
> 
> 
> exec "from %s import %s" % (your_module_name, your_imported_symbol)
> 
> HTH,
> Irmen.
> 
thanks



From james at logicalprogression.net  Wed Jan 28 12:34:46 2004
From: james at logicalprogression.net (James Henderson)
Date: Wed, 28 Jan 2004 17:34:46 +0000
Subject: Curious string behavior
In-Reply-To: <000001c3e5c3$5a63a8d0$5501a8c0@markxp>
References: <000001c3e5c3$5a63a8d0$5501a8c0@markxp>
Message-ID: <200401281734.46219.james@logicalprogression.net>

On Wednesday 28 January 2004 5:22 pm, mark wrote:
> I've encountered an anomaly while using the string module (specifically,
> string.split).  Here's the snippet:
>
> import string
>
> address2 = ' '
> line = 'function, dealer, type, firstname, lastname, vin, blank'
> print 'Address2 Type (first check): ', type(address2)
> function, dealer, type, firstname, lastname, vin, blank =
> string.split(line, ',')
> print 'Address2 type (second check): ', type(address2)
>
> I've extracted this from a larger script, but the error happens roughly
> the same way.  Now, here's what I would expect to see:
>
> Address2 Type (first check):  <type 'str'>
> Address2 type (second check):  <type 'str'>
>
> Here's what I get instead:
>
> Address2 Type (first check):  <type 'str'>
> Address2 type (second check):
> Traceback (most recent call last):
>   File
> "C:\PROGRA~1\Python\lib\site-packages\Pythonwin\pywin\framework\scriptut
> ils.py", line 310, in RunScript
>     exec codeObject in __main__.__dict__
>   File "C:\Program Files\Python\test1.py", line 7, in ?
>     print 'Address2 type (second check): ', type(address2)
> TypeError: 'str' object is not callable
>
> What the heck is going on here?  I figure I'm just missing something.

You've masked the function "type" with a string called "type", the value of 
which is " type".

James
-- 
James Henderson, Logical Progression Ltd.
http://www.logicalprogression.net/
http://sourceforge.net/projects/mailmanager/




From rmkrauter at yahoo.com  Fri Jan 23 23:33:46 2004
From: rmkrauter at yahoo.com (Rich Krauter)
Date: Fri, 23 Jan 2004 23:33:46 -0500
Subject: Batch commands on Windows
In-Reply-To: <grmQb.15157$yd7.13778@newssvr27.news.prodigy.com>
References: <7A3Qb.4870$AK2.3953@newssvr29.news.prodigy.com>
	<mailman.689.1074867434.12720.python-list@python.org>
	<grmQb.15157$yd7.13778@newssvr27.news.prodigy.com>
Message-ID: <1074918825.4458.144.camel@vaio>

Each of your system calls spawns it's own separate shell with its own
set of environment variables. You probably want to look into os.environ
(python) or %ENV (perl) to set your shell variables.

On Fri, 2004-01-23 at 23:23, Moosebumps wrote:

> > Can you give an example of what you mean, in Perl as well as what you
> hoped
> > would work in Python? I couldn't quite understand what it is that you're
> trying
> > to do.
> 
> OK, actually on second test, the problem is mostly with IDLE, but not
> totally.  When I hit F5 under IDLE, it behaves differently with respect to
> the command window then if I just run it by double-clicking on the file.
> 
> Here is an example:
> 
> BatchTest.bat:
> 
> set MYVAR=3
> dir
> pause
> dir
> echo %MYVAR%
> pause
> 
> BatchTest.py:
> 
> # the intention is to do the same thing as BatchTest.bat, but it doesn't
> work under either IDLE or by double-clicking
> # in particular the environment variable is not saved, and it doesn't work
> if I replace os.system with os.popen
> 
> import os
> 
> os.system("set MYVAR=3")
> os.system("dir")
> os.system("pause")
> os.system("dir")
> os.system("echo %MYVAR%")
> os.system("pause")
> 
> BatchTest.pl:
> 
> # this actually does the same thing as Python, I was mistaken.  I was
> mislead by the IDLE behavior.
> 
> system('set MYVAR=3');
> system('dir');
> system('pause');
> system('dir');
> system('echo %MYVAR%');
> system('pause');
> 
> The general idea is that it would be nice if there weren't any differences
> between the batch file and python.  From a practical standpoint, it would
> encourage a lot of people to switch from nasty batch files to Python scripts
> if you could just surround the entire thing with os.batch(' ') or some
> similar sort of mechanical textual substitution.  Then you could clean it up
> gradually.
> 
> I am aware of os.environ and such, and that is useful, but it's not really
> the point.
> 
> Of course I could write a function to take a bunch of strings, write a batch
> file, save the working directory, execute it, restore the current directory,
> then delete the batch file, but that seems like an awful hack.  Though I
> probably will do that at some point.
> 
> > > What's the deal with that?  I thought Python started out as a scripting
> > > language.  And that seems like the most basic thing that a scripting
> > > language should do.
> >
> > Dunno, although MS-DOS shell scripting is certainly a small subset of
> scripting
> > in general. Maybe with a concrete example somebody will be able to give
> you a
> > hand.
> 
> It is a small subset, but an important subset.  Shell scripting started
> probably when people got sick of typing the same commands into the prompt.
> For a language to really support shell scripting, it should provide a way of
> automating the process of typing in the commands.  As in, there should be no
> difference whether you're actually typing, or you're running the script.
> 
> If there is a way and I don't know about it, I would be happy to hear about
> it.  But I do think it is a pretty big hole.
> 
> MB
> 
-------------- next part --------------
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From eric.brunel at N0SP4M.com  Mon Jan 19 05:38:52 2004
From: eric.brunel at N0SP4M.com (Eric Brunel)
Date: Mon, 19 Jan 2004 11:38:52 +0100
Subject: Looking for very simple general purpose tokenizer
References: <bug9ij$30k$1@news.tudelft.nl>
Message-ID: <bugbkc$m0d$1@news-reader4.wanadoo.fr>

Maarten van Reeuwijk wrote:
> Hi group,
> 
> I need to parse various text files in python. I was wondering if there was a
> general purpose tokenizer available. I know about split(), but this
> (otherwise very handy method does not allow me to specify a list of
> splitting characters, only one at the time and it removes my splitting
> operators (OK for spaces and \n's but not for =, / etc. Furthermore I tried 
> tokenize but this specifically for Python and is way too heavy for me. I am
> looking for something like this:
> 
> 
> splitchars = [' ', '\n', '=', '/', ....]
> tokenlist = tokenize(rawfile, splitchars)
> 
> Is there something like this available inside Python or did anyone already
> make this? Thank you in advance

You may use re.findall for that:

 >>> import re
 >>> s = "a = b+c; z = 34;"
 >>> pat = " |=|;|[^ =;]*"
 >>> re.findall(pat, s)
['a', ' ', '=', ' ', 'b+c', ';', ' ', 'z', ' ', '=', ' ', '34', ';', '']

The pattern basically says: match either a space, a '=', a ';', or a sequence of 
any characters that are not space, '=' or ';'. You may have to take care 
beforehands about special characters like \n or \ (very special in regular 
expressions)

HTH
-- 
- Eric Brunel <eric dot brunel at pragmadev dot com> -
PragmaDev : Real Time Software Development Tools - http://www.pragmadev.com



From aahz at pythoncraft.com  Fri Jan  2 19:19:55 2004
From: aahz at pythoncraft.com (Aahz)
Date: 2 Jan 2004 19:19:55 -0500
Subject: Keyboard browsing (was Re: ANN: Python Language Reference)
References: <b16e4ef7.0312260911.42e26052@posting.google.com>
	<bskgj5$gb6$1@panix2.panix.com>
	<cb035744.0312290109.156cd633@posting.google.com>
	<slrnbvbouk.2i08.kamikaze@kuoi.asui.uidaho.edu>
Message-ID: <bt51rb$c6f$1@panix2.panix.com>

In article <slrnbvbouk.2i08.kamikaze at kuoi.asui.uidaho.edu>,
Mark 'Kamikaze' Hughes <kamikaze at kuoi.asui.uidaho.edu> wrote:
>Will Stuyvesant <hwlgw at hotmail.com>
>wrote on 29 Dec 2003 01:09:18 -0800:
>> [Aahz]
>>>
>>> That's why you should use Lynx.  Then you don't have any options.  ;-)
>>
>> But isn't Lynx text-only?  I want to see the pics!  Even though I am
>> not the kind of pervert that want to do things to them with the mouse.
>
>  Opera can be completely keyboard-driven.  And to search, you can type
>/TEXT, just like you would in lynx or any other proper viewing or
>editing tool.

Really?  That's not in my Opera/Linux 6.1.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

Weinberg's Second Law: If builders built buildings the way programmers wrote 
programs, then the first woodpecker that came along would destroy civilization.


From shian5.bbs at wretch.csie.nctu.edu.tw  Sun Jan 11 09:31:49 2004
From: shian5.bbs at wretch.csie.nctu.edu.tw (¯u¤ß)
Date: 11 Jan 2004 14:31:49 GMT
Subject: delete file with zipfile
Message-ID: <4ADeXb$9SJ@wretch.csie.nctu.edu.tw>

? ???No.Spam.mc at No.Spam.mclaveau.No.Spam.com (Michel Claveau/Hamster)?????
> Hi !
> Please, I beseech you, I beg you, to look at this URL :
>         http://mclaveau.com/ress/python/zipmci.htm
> @-salutations

Thanks your share
Although i can not read French, i thought Python is our language :D
--
?????????????????????????????????????
?????BLOG http://wretch.twbbs.org/blog ???? ????? ?????
?????????????????????????????????????
?????????????????????????????????????
???????????????????218-166-150-104.HINET-IP.hinet.net?


From csgcsg39 at hotmail.com  Fri Jan  9 11:06:12 2004
From: csgcsg39 at hotmail.com (CSG)
Date: 9 Jan 2004 08:06:12 -0800
Subject: ZSI and faults
Message-ID: <592ab9dd.0401090806.30cdbba@posting.google.com>

Dear All,

I'm very new to python/ZSI and have a (simple) query to ask. I have a
simple client:

from ZSI.client import Binding
fp=open('debug.out','w')
b=Binding(url='somewhere',tracefile=fp)
print b.connect('usename')
fp.close()

and a server of

from ZSI import *
import sys

def connect(usename):
  try:
    <something that fails>
  except Exception,e:
    <write the Exception in the SOAP message back to client>
    sys.exit(1)


The trouble I'm having is with the <write the Exception in the SOAP
message bit>. I've tried things like:

FaultFromException(e,0).AsSOAP(sys.stdout)
or
f=Fault()
f.code="some message"

with no success.

Any suggestions

Many thanks

Colin


From tzot at sil-tec.gr  Thu Jan 15 04:39:55 2004
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Thu, 15 Jan 2004 11:39:55 +0200
Subject: Why learn Python ??
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<pan.2004.01.12.20.18.36.606924@yahoo.com>
	<4003cfeb$0$19263$626a54ce@news.free.fr>
Message-ID: <i7ib00tsj8p97qm42h2f0l216f3ftugrvh@4ax.com>

On Tue, 13 Jan 2004 12:21:00 +0100, rumours say that Bruno Desthuilliers
<bdesth.tagada at tsoin-tsoin.free.fr> might have written:

><troll>
>Woops ! The problem with Perl is actually that it's more or less a 
>write-only language !-)
></troll>

I think you mean Perl is a WORN language (Write Once, Read Never).
-- 
TZOTZIOY, I speak England very best,
Ils sont fous ces Redmontains! --Harddix


From philh at invalid.email.address  Mon Jan 12 05:02:08 2004
From: philh at invalid.email.address (phil hunt)
Date: Mon, 12 Jan 2004 10:02:08 +0000
Subject: easibox-0.3.0 released
Message-ID: <slrnc04s50.lh1.philh@cabalamat.cabalamat.org>

I've just released version 0.3.0 of my Easibox program, which is
used to automate the creation of archive files (tar, tar.gz, tgz,
tar.bz2 and zip formats), typically for open source projects.

Version 0.3.0 adds two new features to Easibox: 
 
* I've added the ability to make .tar.bz2 archive files.
  (Suggested by Andr? Simon).

* I've included the ability for the project's .easiboxrc file to
  automatically process archive files after creation, for example
  by copying them to a web directory. This is  described in more
  detail in my article "New directions for Easibox":
  <http://www.cabalamat.org/weblog/art_170.html>

Easibox is written in Python and licensed under the GNU General
Public License; see file COPYING (which comes with the
distribution) for details.

Release notes for the latest version of Easibox:
   <http://www.cabalamat.org/weblog/current_easibox.html>
   
The Easibox home page:
   <http://www.cabalamat.org/oss/easibox/intro.html>

-- 
"It's easier to find people online who openly support the KKK than 
people who openly support the RIAA" -- comment on Wikipedia
(Email: zen19725 at zen dot co dot uk)  




From cjensen at soapfire.com  Tue Jan 20 17:04:22 2004
From: cjensen at soapfire.com (Christian Jensen)
Date: Tue, 20 Jan 2004 22:04:22 GMT
Subject: XML-RPC
References: <mailman.557.1074635333.12720.python-list@python.org>
Message-ID: <GBhPb.794$6o4.391@fe2.texas.rr.com>

Personally, I have gone down this path and have found that using mod_python
is a MUCH better way to go.

"Jonathan Daugherty" <cygnus at cprogrammer.org> wrote in message
news:mailman.557.1074635333.12720.python-list at python.org...
> I'm using python 2.3.3 (#2, Jan  4 2004, 12:24:16), [GCC 3.3.3 20031229
> (prerelease) (Debian)], debian unstable.  I have written a client and
> server program which communicate using the built-in xmlrpclib and
> SimpleXMLRPCServer.  The server starts up fine, and the client can
> connect to it and issue commands (method calls) just fine.  However,
> after some unknown period of time, the client hangs at the time of the
> method call, during which time netstat reports:
>
>       recv  send
> tcp   307   0  127.0.0.1:9000   127.0.0.1:35496   ESTABLISHED
>
> Once I break the client and run netstat again, I get:
>
> tcp   307   0  127.0.0.1:9000   127.0.0.1:35496   CLOSE_WAIT
>
> And lines such as these hang around in netstat's output for quite some
> time (several are there now, left over from attempts to run the client
> about 8 hours ago).  I haven't been able to identify exactly when this
> starts to occur or why.  Sometimes it happens soon after starting the
> server; sometimes it takes days.
>
> The server is multi-threaded.  The XML-RPC thread is the main thread.
> Proper locking mechanisms are used and I have been able to determine
> that deadlock is not an issue.
>
> Does anyone have any ideas?
>
> Thanks!
>
> -- 
>
>   Jonathan Daugherty
>   http://www.cprogrammer.org
>
>   "It's a book about a Spanish guy called Manual, you should read it."
>                                                             -- Dilbert
>




From bkelley at wi.mit.edu  Thu Jan  8 12:39:29 2004
From: bkelley at wi.mit.edu (Brian Kelley)
Date: Thu, 08 Jan 2004 12:39:29 -0500
Subject: MySQLDB multiple cursor question
In-Reply-To: <gcf0d1-uu3.ln1@beastie.ix.netcom.com>
References: <3ffc6160$0$572$b45e6eb0@senator-bedfellow.mit.edu>
	<3ffd7dbe$0$560$b45e6eb0@senator-bedfellow.mit.edu>
	<gcf0d1-uu3.ln1@beastie.ix.netcom.com>
Message-ID: <3ffd9567$0$559$b45e6eb0@senator-bedfellow.mit.edu>

Dennis Lee Bieber wrote:
> f       The DB-API specifies a common method for accessing data -- this means 
> "cursors".
> 
>         MySQL itself does not implement that type of cursor.
> 
>         Therefore, MySQLdb has to emulate cursors locally. That emulation may 
> be tied to one per connection (or, at least, one active per connection 
> -- maybe doing a conn.commit()?) [This is all hypothesis at this time]

Guess I'll have to crack open the mysqldb source code and fire up a 
debugger.  The main problem with using multiple connections is that I 
have to cache the user's password in order to repoen the connection 
which makes me feel very queasy.

The error is very reproducible but that fact that it works sometimes and 
not others means that it is probably a bug in mysqldb.

Brian



From fumanchu at amor.org  Thu Jan 15 01:05:46 2004
From: fumanchu at amor.org (Robert Brewer)
Date: Wed, 14 Jan 2004 22:05:46 -0800
Subject: Bug or feature?
Message-ID: <DE1CF2B4FEC4A342BF62B6B2B334601E561C1E@opus.amorhq.net>

Alexey Nezhdanov wrote:
> Hello. Found a strange python behaivoir while writing some 
> object. I've 
> stripped out all other stuff so the problem is stright here:
> =================================
> #!/usr/bin/python
> 
> class Object:
>      def __init__(self,val):
>          self.val=val
> 
>      def Sub(self,delta):
>          self.val-=delta
>          return delta
> 
> c=Object(1)
> 
> ### case 1 ###
> d=c.Sub(1)
> c.val+=d
> print 'case A:',c.val
> 
> ### case 2 ###
> c.val+=c.Sub(1)
> print 'case B:',c.val
> =================================
> Case 1 and case 2 prints out different calues (1 and 2 respectively).
> Do not know - if this is a bug or feature of python.

Disassembly is your friend:

>>> def pluseq(inst):
... 	inst.val += inst.Sub(1)
... 	
>>> dis.dis(pluseq)
  2           0 LOAD_FAST                0 (inst)
              3 DUP_TOP             
              4 LOAD_ATTR                1 (val)
              7 LOAD_FAST                0 (inst)
             10 LOAD_ATTR                2 (Sub)
             13 LOAD_CONST               1 (1)
             16 CALL_FUNCTION            1
             19 INPLACE_ADD         
             20 ROT_TWO             
             21 STORE_ATTR               1 (val)
             24 LOAD_CONST               0 (None)
             27 RETURN_VALUE        
>>> def subthenplus(inst):
... 	d = inst.Sub(1)
... 	inst.val += d
... 	
>>> dis.dis(subthenplus)
  2           0 LOAD_FAST                0 (inst)
              3 LOAD_ATTR                1 (Sub)
              6 LOAD_CONST               1 (1)
              9 CALL_FUNCTION            1
             12 STORE_FAST               1 (d)

  3          15 LOAD_FAST                0 (inst)
             18 DUP_TOP             
             19 LOAD_ATTR                3 (val)
             22 LOAD_FAST                1 (d)
             25 INPLACE_ADD         
             26 ROT_TWO             
             27 STORE_ATTR               3 (val)
             30 LOAD_CONST               0 (None)
             33 RETURN_VALUE        

As you can see, the order of evaluation in pluseq() is:
   load val, call Sub(), add, store result.
whereas the order in subthenplus() is:
   call Sub(), load val, add, store result.

...which explains things a bit. If we had written inst.val = inst.val +
inst.Sub(1), the order would be the same as pluseq (but we'd get a
binary add instead of inplace).


Robert Brewer
MIS
Amor Ministries
fumanchu at amor.org



From cfox at cfconsulting.ca  Sat Jan 10 16:15:10 2004
From: cfox at cfconsulting.ca (Colin Fox)
Date: Sat, 10 Jan 2004 21:15:10 GMT
Subject: LC_MONETARY formatting
References: <pan.2004.01.09.22.19.04.935366@cfconsulting.ca>
	<3FFF38DE.1050603@v.loewis.de>
	<pan.2004.01.10.00.01.07.962349@cfconsulting.ca>
	<btotmt$1899$1@nadya.doma>
Message-ID: <pan.2004.01.10.21.15.05.521663@cfconsulting.ca>

On Sat, 10 Jan 2004 16:12:10 +0300, Serge Orlov wrote:


>> In my case, I have
>> numbers that are always in either Canadian or US dollars, so the dollar
>> sign is fine, and the thousands-separator value is fine.
> 
> You should have money class. It should be a subclass of FixedPoint class.
> If you want to deal with Canadian or US dollars only it's as simple as:
> class Dollars(FixedPoint):
>     def __init__(self,amount):
>         super(Dollars,self).__init__(amount)
>     def __str__(self):
>         if self < 0:
>             return locale.format("-$%.2f",-self,True)
>         else:
>             return locale.format("$%.2f",self,True)
> 
> 
> No warranty, of course, that it works and fulfills all your needs.
>>>> locale.format("$%.2f",1000000000000,True)
> '$1,000,000,000,000.00'

Thanks, the locale.format() function indeed does what I need. However, my
understanding of it is that it uses the LC_NUMERIC locale info, rather
than the LC_MONETARY. For my purposes, this is certainly sufficient.

I'd like to use a class, but since this is part of a Zope application,
that's a little difficult (and overkill for this particular need).

It would be nice if we could have something like:
locale.format("%m",1000000,True,locale.LC_MONETARY)
though as is indicated in the strfmon docs, it wouldn't be quite so simple
(taking into account the different types of currency markers, padding,
spacing, etc).

cf


From max at alcyone.com  Sun Jan  4 16:15:37 2004
From: max at alcyone.com (Erik Max Francis)
Date: Sun, 04 Jan 2004 13:15:37 -0800
Subject: Problems compiling python
References: <bt9u1m$ek3$05$1@news.t-online.com>
Message-ID: <3FF88279.33BF192A@alcyone.com>

Florian Lindner wrote:

> I want to compile that small python script:
	...
> bastet:/ # chmod u+x test.pyc
> bastet:/ # ./test.pyc
> ./test.pyc: line 1: syntax error near unexpected token `;'
> '/test.pyc: line 1: `;??
> bastet:/ #
> 
> What is wrong?

A compiled Python file (.pyc) is not an executable.  (Specifically, in
the Unix world, it does not contain a bangpath.)  Instead, just pass it
as an argument to the Python interpreter:

max at oxygen:~/tmp% cat > hello.py
print "Hello, world!"
^D
max at oxygen:~/tmp% python
Python 2.3.3 (#1, Dec 22 2003, 23:44:26) 
[GCC 3.2.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import py_compile
>>> py_compile.compile('hello.py')
>>> ^D
max at oxygen:~/tmp% ls hello.py*
hello.py  hello.pyc
max at oxygen:~/tmp% rm hello.py
max at oxygen:~/tmp% python hello.pyc
Hello, world!

-- 
 __ Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
/  \ San Jose, CA, USA && 37 20 N 121 53 W && &tSftDotIotE
\__/ Granted that I must die, how shall I live?
    -- Michael Novak


From shoot at the.moon  Thu Jan  8 16:32:47 2004
From: shoot at the.moon (Steve Horsley)
Date: Thu, 08 Jan 2004 21:32:47 +0000
Subject: [OT] Database reporting software
Message-ID: <btki05$7d0$1@news.freedom2surf.net>

I have an existing system working on MS Access, and software that 
regularly logs events into it (and deletes old events after a year).

Now need to move to real servers, probably Solaris though possibly 
Linux. Modifying the software to update the database (maybe mySQL or 
Oracle) contents is easy enough, but how do I produce reports 
(statistics and summaries) on the database contents?

I could contemplate web based or application based report generation, 
but are there easy to use draggy-droppy report designing applications 
around? Just the names would enable me to look them up.

I am struggling with OpenOffice.org at the moment, trying to see if it 
can do what I'm looking for, but it doesn't seem to be able to do GROUP 
BY and SUM() - simple aggregation stuff.

All suggestions would be very welcome.

Steve


From skip at pobox.com  Thu Jan  1 01:02:01 2004
From: skip at pobox.com (Skip Montanaro)
Date: Thu, 1 Jan 2004 00:02:01 -0600
Subject: Python Job Market
In-Reply-To: <pan.2004.01.01.02.57.59.651834@yahoo.com>
References: <pan.2003.12.31.09.55.52.222383@yahoo.com>
	<mailman.73.1072889256.8134.python-list@python.org>
	<pan.2004.01.01.02.57.59.651834@yahoo.com>
Message-ID: <16371.47065.615397.279787@montanaro.dyndns.org>


    Samuel> |Thus Spake Dave Brueck On the now historical date of Wed, 31 Dec 2003
    Samuel> 09:47:31 -0700|
    >> From what I've seen the market is definitely growing, but if you're
    >> hunting job listings for an all-Python job the pickings are pretty
    >> slim.

    Samuel> *sigh* I know.  I didn't ask my question here without first
    Samuel> searching around to see what was being asked for.  It was not
    Samuel> encouraging.

I meant to reply earlier.  The slimness of the pickings means if you are
adamant about using Python, you may well wind up writing Python programs for
application areas you're not particularly interested in.  I think I'd rather
find something I'm interested in then use Python where possible, like so:

    >> The easiest way to use Python in your job will probably be if you
    >> introduce it to the company yourself and then use it as the
    >> opportunities arise

As it turns out my current day job is as essentially a system administrator.
I try to turn it into an application programming job at every opportunity,
and fortunately my management doesn't really care what I use.

Skip



From cfox at cfconsulting.ca  Fri Jan  9 17:19:09 2004
From: cfox at cfconsulting.ca (Colin Fox)
Date: Fri, 09 Jan 2004 22:19:09 GMT
Subject: LC_MONETARY formatting
Message-ID: <pan.2004.01.09.22.19.04.935366@cfconsulting.ca>

Hi, all.

This feels like a stupid question to me, but I've scoured the Internet
(yes, the whole thing! :) and I can't find a single example of using the
locale module to format money.

So I have:

cash = 12345.6

and the locale is set to "en_CA" (though that doesn't matter, really).

I would like to be able to print "$12,345.60"

Is there a format string, or function, or *something* that will take
advantage of the monetary formatting info in the locale object? Or did
they provide all that formatting information just so that I have to write
it myself?

The only docs on using the locale object contain a single example of
comparing two strings. It would sure be nice to see examples of each of
the locale features.

Any help would be GREATLY appreciated!

Thanks,
  cf


From trentm at ActiveState.com  Wed Jan 28 16:19:11 2004
From: trentm at ActiveState.com (Trent Mick)
Date: Wed, 28 Jan 2004 13:19:11 -0800
Subject: Cross Platform Browser Launcher
In-Reply-To: <8089854e.0401280118.2f07fb65@posting.google.com>;
	from michael@foord.net on Wed, Jan 28, 2004 at 01:18:21AM -0800
References: <8089854e.0401280118.2f07fb65@posting.google.com>
Message-ID: <20040128131911.B11615@ActiveState.com>

[Fuzzyman wrote]
> I've written a simple application in python with an HTML help file.
> 
> I'm looking for a cross platform way of launching the help file.

http://www.python.org/doc/current/lib/module-webbrowser.html


Cheers,
Trent

-- 
Trent Mick
TrentM at ActiveState.com



From skip at pobox.com  Wed Jan 21 19:35:51 2004
From: skip at pobox.com (Skip Montanaro)
Date: Wed, 21 Jan 2004 18:35:51 -0600
Subject: Secure Voting software
In-Reply-To: <20040121174434.28446.00000428@mb-m15.aol.com>
References: <20040121174434.28446.00000428@mb-m15.aol.com>
Message-ID: <16399.6887.17955.538485@montanaro.dyndns.org>


    allen> Listening to National Public Radio while reading
    allen> comp.lang.python. What a life!  I just heard a piece on NPR about
    allen> the security failures of an electronic voting system being
    allen> developed. I know a voting system could be developed in python. I
    allen> am working on a simulator myself to run via the web (a personal
    allen> project only)

    allen> Are there any features which would make python a viable
    allen> alternative to develop a real voting system for use in the US?
    allen> Why or why not?

    allen> What things must I keep in mind when I design a python
    allen> application to be secure?

    allen> Since python is developed using C, can python be free from the
    allen> buffer overrun problems which plague other C programs?

Yes, to a great extent, because you need to find buffer overrun
possibilities in the Python interpreter, but not in every Python
application.

As for voting projects, check out:

    http://gnosis.python-hosting.com/voting-project/

Python is the development language I believe.  I haven't followed it in a
couple months.

Skip



From michael at foord.net  Mon Jan 19 07:36:52 2004
From: michael at foord.net (Fuzzyman)
Date: 19 Jan 2004 04:36:52 -0800
Subject: Tk Icon - request to Fredrik Lundh
Message-ID: <8089854e.0401190436.10f99713@posting.google.com>

There is a very interesting (and potentially useful) program on the
effbot website - called Tkicon.

http://www.effbot.org/downloads/

Unfortuantely the last supported version of python is 2.1
I've seen a few people asking, but never an answer, on Python 2.3
support.

So a request to Fredrik to build a 2.3 distribution............

Also in his interesting PDF book "(the eff-bot guide to) The Standard
Python Library"

http://www.effbot.org/zone/librarybook-index.htm

he mentions that you can download the example files... yet the link
suggested doesn't point to it and I can't find it... any clues anyone
??

Fuzzball


From mcfletch at rogers.com  Fri Jan  9 18:19:11 2004
From: mcfletch at rogers.com (Mike C. Fletcher)
Date: Fri, 09 Jan 2004 18:19:11 -0500
Subject: Straw poll on Python performance (was Re: Python is far from
 a	top performer ...)
In-Reply-To: <026e01c3d702$970ec5a0$6401fea9@YODA>
References: <ryELb.238$tK2.228@amstwist00><3fff234a$0$129$e4fe514c@dreader3.news.xs4all.nl>	<3FFF26A1.943DEA84@engcorp.com>
	<026e01c3d702$970ec5a0$6401fea9@YODA>
Message-ID: <3FFF36EF.90208@rogers.com>

Dave Brueck wrote:

>Peter wrote:
>  
>
...

>>This is my "straw poll" question:
>>
>>  Do you spend a "significant" amount of time actually optimizing your
>>  Python applications?  (Significant is here defined as "more than five
>>  percent of your time", which is for example two hours a week in a
>>  40-hour work week.)
>>    
>>
>
>Yay, straw poll! ;-)
>  
>
Indeed, yay ;) .

I am often found optimising.  The total time spent on it is probably 
somewhere around 1-2% of total (after all, I do still *use* Python, it's 
not like it's killing me).  A lot of my projects are speed-sensitive 
(e.g. OpenGLContext trying to give interactive frame-rates in 3D 
scenegraph rendering, SimpleParse trying to create really fast parsers, 
web-sites trying to process 10s of thousands of records into summary 
views interactively), but I don't think I'm *that* far from the norm in 
the amount of time spent on optimisation.

I'd be surprised if there's not some difference between the experience 
of library programmers and application programmers in this regard.  
Library developers tend to need to focus more effort on performance to 
allow users of the libraries some inefficiencies in their usage.  That 
effort tends to be more in the planning stages, though, making sure 
you've chosen good algorithms, estimating work-loads and required 
throughput.  You try to make sure the library is robust and fast by 
designing it that way, not by trying to optimise it after the fact.  You 
plan for worst-case scenarios, and as a result you become "worried" 
about performance.  An application developer is normally going to use 
optimised libraries and just run with it, only needing to deal with 
unacceptable performance if it happens to show up in their particular 
project.

Anyway, back to it,
Mike

_______________________________________
  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://members.rogers.com/mcfletch/






From john at reachin.se  Fri Jan 23 05:47:28 2004
From: john at reachin.se (John McLaughlin)
Date: 23 Jan 2004 02:47:28 -0800
Subject: Using python as client-side scripting language in IE 6
References: <7eecf173.0312160336.1160a340@posting.google.com>
	<vtuaqpph8de91b@news.supernews.com> <3FE86415.DA6FFEBC@engcorp.com>
Message-ID: <6142447d.0401230247.26670d49@posting.google.com>

Hi,

Yes I have this working. Do this at your own risk:
Add the following to pyscript.py after the AXNotRExec class definition
(around line 89):
AXRExec = AXNotRExec

Then register with
python pyscript_rexec.py --debug
               ^^^^^^ (must be the rexec version).
You may have to unregister any other versions first:
python pyscript.py --unregister

Cheers,
-John

Peter Hansen <peter at engcorp.com> wrote in message news:<3FE86415.DA6FFEBC at engcorp.com>...
> John Roth wrote:
> > 
> > "popov" <google at evpopov.com> wrote:
> > > I ran win32comext\axscript\client\pyscript.py and pyscript_rexec.py to
> > > register python as a scripting engine. No errors from those scripts.
> > >
> > > As I understand it and from what I have read in this forum and
> > > elsewhere, it should work, but it doesn't: what am I doing wrong ?
> > 
> > I doubt if it will work for a while. It doesn't work on my system
> > either, and a quick check of the pyscript_rexec.py module says
> > that it will enable Rexec support. Rexec support was removed from
> > base Python in release 2.2.3 and later, so I doubt if this is ever
> > going to work until ActiveState (or Mark Hammond) changes the
> > base code to use Exec instead of RExec.
> 
> I was just trying this myself and had the same lack of results.
> I note however that while pyscript_rexec.py uses the Rexec support
> and might not work for reasons John describes, pyscript.py claims not
> to do that, and seems to be supposed to work.  Yet it doesn't....
> 
> Anyone tried this lately with success?
> 
> For the record, I was trying on a vanilla Win98 machine with Py2.3.2.1
> and the latest win32all as well.  (The relevant test scripts execute
> okay, showing that the issue is with IE alone, not with the basic
> capability that allows ActiveX script hosting with Python.)
> 
> -Peter


From skip at pobox.com  Wed Jan 28 11:09:25 2004
From: skip at pobox.com (Skip Montanaro)
Date: Wed, 28 Jan 2004 10:09:25 -0600
Subject: isinstance() bug
In-Reply-To: <bv8lha$pbi5a$1@ID-223265.news.uni-berlin.de>
References: <mailman.907.1075296157.12720.python-list@python.org>
	<bv8lha$pbi5a$1@ID-223265.news.uni-berlin.de>
Message-ID: <16407.57013.866123.204852@montanaro.dyndns.org>


    Sidharth> python is a dynamic language it figures out where modules are
    Sidharth> located at run time, it would be expensive to check all paths
    Sidharth> to see if they ended up at the same file.

Maybe not:

    Help on function abspath in module posixpath:

    abspath(path)
        Return an absolute path.

Considering all the other stuff import has to do, this seems like only a
small extra bit of work.

Skip



From peter at engcorp.com  Mon Jan 26 14:59:53 2004
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 26 Jan 2004 14:59:53 -0500
Subject: TELNET instead PING
References: <5f505344.0401260332.184d4225@posting.google.com>
Message-ID: <401571B9.F9DF99D0@engcorp.com>

DCK wrote:
> 
> Into group-archive i found most e-mails, which touches PINGing.
> In my work i've used TELNET for testing if host is operational.
> Sometimes, for unknown reasons, workstation doesn't respond
> for PINGing. But in WinNT network, all hosts has a nbsession
> listening on port 139. I always use this script instead PING
> command (hope, will be usefull for someone :) ):

Interesting, but why would you use TELNET for that?  Telnet is
simply one of many possible protocols, whereas you need only
open a socket to the port to see if the host is responding.

from socket import *
s = socket(AF_INET, SOCK_STREAM)
try:
    s.connect((host, port))
    print 'host connected'
    s.close()
except error:
    print 'host not responding'

Should basically do the same job ...

-Peter


From tomas at fancy.org  Thu Jan 15 11:37:12 2004
From: tomas at fancy.org (Tom Plunket)
Date: Thu, 15 Jan 2004 08:37:12 -0800
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
	<K_YMb.10994$9k7.204413@news.xtra.co.nz>
	<bu1qq3$cu440$1@ID-207230.news.uni-berlin.de>
	<n22Nb.11299$9k7.210522@news.xtra.co.nz>
	<bu2pgs$d123a$1@ID-207230.news.uni-berlin.de>
	<NlhNb.11982$9k7.221029@news.xtra.co.nz>
Message-ID: <sbgd0093j1rklrg4fvasgmq28dck97bjes@4ax.com>

Peter Ashford wrote:

> It would just as dumb as me criticising you for not advancing OS 
> software - you've never intended to, don't care, so the criticism 
> would be stupid.

Indeed, though, Brandon's mere existence is utterly worthless to
all other developers in the world.  ...at least using his
characterizations of value-adding.

-tom!


From usenet_spam at janc.invalid  Thu Jan 15 23:27:13 2004
From: usenet_spam at janc.invalid (JanC)
Date: Fri, 16 Jan 2004 04:27:13 GMT
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
	<pan.2004.01.14.01.17.00.970198@fakeemail.com>
	<bu2ana$bmpci$1@ID-207230.news.uni-berlin.de>
	<Xns94711BBF5F7D6JanC@213.119.4.35>
	<LiwNb.8126$f97.2162@fe3.columbus.rr.com>
Message-ID: <Xns9472377A47A96JanC@213.119.4.35>

amonroejj at yahoo.com (R. Alan Monroe) schreef:

> In article <Xns94711BBF5F7D6JanC at 213.119.4.35>, usenet at janc.cjb.net 
> wrote:
>
>>You think "cross-platform" means "it runs out-of-the-box on all
>>possible platforms that ever existed, now exist, and will ever exist"?
>>
>>Please go searching and come back when you find 1 (one) program which
>>fits that definition...  :-p
> 
> "Hello World"? :^)

You know, some early computers couldn't even do things that simple.  ;-)

-- 
JanC

"Be strict when sending and tolerant when receiving."
RFC 1958 - Architectural Principles of the Internet - section 3.9


From lists at tomchance.org.uk  Sun Jan 18 18:52:12 2004
From: lists at tomchance.org.uk (Tom Chance)
Date: Sun, 18 Jan 2004 23:52:12 +0000
Subject: Plotting n-ary trees
Message-ID: <bufb3o$tt9$1@news.ukfsn.org>

Hullo,

I'm trying to plot a family tree in a way that can be displayed on a web
page without recourse to clever javascript. The only solution I can think
of is to plot a tree to a JPEG or PNG and embed it in the page, but I can't
find any code that will do this, and I've not got the time nor the
intelligence to be doing that sort of thing myself ;-)

Can anyone suggest anything, other than using graphviz which isn't installed
on my host's server.

Regards,
Tom


From enrique.palomo at xgs-spain.com  Tue Jan 20 06:04:55 2004
From: enrique.palomo at xgs-spain.com (Enrique)
Date: Tue, 20 Jan 2004 12:04:55 +0100
Subject: python As400
Message-ID: <001e01c3df45$3d86ae80$6c010a0a@epalomo>

Hello
I'm very interested in python for AS/400. I must migrate an application that
is running under windows to AS/400.
Has anyone worked with python in that platform??
what about performace??
The scripts are basicly of string manipulation and i/o.
any kind of information will be welcome.

Thanks a lot.

Enrique (Madrid)





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From test at test.com  Mon Jan 12 11:50:13 2004
From: test at test.com (D)
Date: Mon, 12 Jan 2004 16:50:13 GMT
Subject: TypeError with genCGI.py
Message-ID: <9fAMb.217748$Vu5.16273229@twister.southeast.rr.com>

Hello, 

We are using genCGI.py from the Internet Programming with Python book. We migrated to using Python 2.2.2 from 2.1.3 and we are now getting the following:

Unhandled exception encountered. 

exceptions.TypeError
  File "/usr/ngasi/contexts/odomain/odomain/cgi-bin/genCGI.py", line 94, in GO
    form = self.get_form()
  File "/usr/ngasi/contexts/odomain/odomain/cgi-bin/genCGI.py", line 264, in get_form
    form = self.get_form_base(self)

I notice that the month4.cgi example on the book site gets the same error:

http://starship.python.net/crew/aaron_watters/cgi/month4.cgi

Does anyone have any idea what the problem is or perhaps have a fix?

Thanks,

Dan

Dan Snider
Object Domain Systems Inc.
http://www.objectdomain.com
dsnider at objectdomain.com 
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From gumuz at looze.net  Wed Jan 14 10:19:47 2004
From: gumuz at looze.net (Guyon Morée)
Date: Wed, 14 Jan 2004 16:19:47 +0100
Subject: wxPython worries
References: <mailman.352.1074092092.12720.python-list@python.org>
Message-ID: <40055e11$0$282$4d4ebb8e@news.nl.uu.net>

I've got the same worries, but I'm still not really convinced...
boa-constructor is nice... but not there yet


"James Goldwater" <james at eccehomo.co.uk> wrote in message
news:mailman.352.1074092092.12720.python-list at python.org...
> I'm starting a new hopfully-commercial project soon, and I face a
> dilemma about whether Python with wxPython would be appropriate.
>
> The project has 3 main areas:
>
> a) manipulation of lists and trees, using..
> b) a hopefully dead-sexy gui, all in order to...
> c) eventually pump out certain bits of the datastructure over the
> network in semi-realtime (< 10ms accuracy or so).
>
> The target is Win32 for now (98 - XP). Now, if it were up to me, I'd use
> Delphi - it's what I know best.  But I'm working with a less experienced
> developer with whom I have no languages in common.  He's keen to get
> started on C#, I've toyed with C# and though it looks easy, I don't see
> any major gains over what I already know.
>
> I've read a lot about python and done some mini-stuff in it, and been
> impressed with it's ease and conciseness.  What worries me is wxPython:
> looking at the demo code, it's quite verbose and 'bitty'.  I'm also
> unclear as to how easy custom controls are to build.
>
> Am I just being confused by my newbie-ness, or are my initial concerns
> justified?  What's anybody else's experiences with gui programming in
> wxPython like vs a RAD like Delphi or .NET?
>
> Thanks,
>
> James.
>
>




From bdusauso at beeznest.NOSPAM.net  Tue Jan 13 04:12:40 2004
From: bdusauso at beeznest.NOSPAM.net (Dusausoy Bruno)
Date: Tue, 13 Jan 2004 10:12:40 +0100
Subject: id3v2 module
Message-ID: <pan.2004.01.13.09.12.39.813880@beeznest.NOSPAM.net>

Hi,

I'd like to know if there is a third-party module for reading/writing
id3v2 informations.
Thanks 


From newsgroups at jhrothjr.com  Tue Jan 20 11:17:16 2004
From: newsgroups at jhrothjr.com (John Roth)
Date: Tue, 20 Jan 2004 11:17:16 -0500
Subject: personal document mgmt system idea
References: <b03e80d.0401200538.10fcf33a@posting.google.com>
Message-ID: <100ql5oc1rctc09@news.supernews.com>

I wouldn't put the individual files in a data base - that's what
file systems are for. The exception is small files (and by the
time you say ".doc" in MS Word, it's now longer a small
file) where you can save substantial space by consolidating
them.

John Roth

"Sandy Norton" <sandskyfly at hotmail.com> wrote in message
news:b03e80d.0401200538.10fcf33a at posting.google.com...
> Hi folks,
>
> I have been mulling over an idea for a very simple python-based
> personal document management system. The source of this possible
> solution is the following typical problem:
>
> I accumulate a lot of files (documents, archives, pdfs, images, etc.)
> on a daily basis and storing them in a hierarchical file system is
> simple but unsatisfactory:
>
>        - deeply nested hierarchies are a pain to navigate
>          and to reorganize
>        - different file systems have inconsistent and weak schemes
>          for storing metadata e.g. compare variety of incompatible
>          schemes in windows alone (office docs vs. pdfs etc.) .
>
> I would like a personal document management system that:
>
> - is of adequate and usable performance
> - can accomodate data files of up to 50MB
> - is simple and easy to use
> - promotes maximum programmibility
> - allows for the selective replication (or backup) of data
>           over a network
> - allows for multiple (custom) classification schemes
> - is portable across operating systems
>
> The system should promote the following simple pattern:
>
>     receive file -> drop it into 'special' folder
>
>     after an arbitrary period of doing the above n times -> run
> application
>
>     for each file in folder:
> if automatic metadata extraction is possible:
>    scan file for metadata and populate fields accordingly
>    fill in missing metadata
> else:
>    enter metadata
> store file
>
>     every now and then:
>   run replicator function of application  -> will backup data
>      over a network
>   # this will make specified files available to co-workers
>   # accessing a much larger web-based non-personal version of the
>   # docmanagement system.
>
> My initial prototyping efforts involved creating a single test table
> in
> mysql (later to include fields for dublin-core metadata elements)
> and a BLOB field for the data itself. My present dev platform is
> windows XP pro, mysql 4.1.1-alpha,  MySQL-python connector v.0.9.2
> and python 2.3.3 . However, I will be testing the same app on Mac OS X
> and Linux Mandrake 9.2 as well.
>
> The first problem I've run into is that mysql or the MySQL
> connector crashes when the size of one BLOB reaches a certain point:
> in this case an .avi file of 7.2 mb .
>
> Here's the code:
>
> <code>
>
> import sys, time, os, zlib
> import MySQLdb, _mysql
>
>
> def initDB(db='test'):
>     connection = MySQLdb.Connect("localhost", "sa")
>     cursor = connection.cursor()
>     cursor.execute("use %s;" % db)
>     return (connection, cursor)
>
> def close(connection, cursor):
>     connection.close()
>     cursor.close()
>
> def drop_table(cursor):
>     try:
>         cursor.execute("drop table tstable")
>     except:
>         pass
>
> def create_table(cursor):
>     cursor.execute('''create table tstable
>         (   id      INTEGER PRIMARY KEY AUTO_INCREMENT,
>             name    VARCHAR(100),
>             data    BLOB
>         );''')
>
> def process(data):
>     data =  zlib.compress(data, 9)
>     return _mysql.escape_string(data)
>
> def populate_table(cursor):
>     files = [(f, os.path.join('testdocs', f)) for f in
> os.listdir('testdocs')]
>     for filename, filepath in files:
>         t1 = time.time()
>         data = open(filepath, 'rb').read()
>         data = process(data)
>         # IMPORTANT: you have to quote the binary txt even after
> escaping it.
>         cursor.execute('''insert into tstable (id, name, data)
>   values (NULL, '%s', '%s')''' % (filename, data))
>         print time.time() - t1, 'seconds for ', filepath
>
>
> def main ():
>     connection, cursor = initDB()
>     # doit
>     drop_table(cursor)
>     create_table(cursor)
>     populate_table(cursor)
>     close(connection, cursor)
>
>
> if __name__ == "__main__":
>     t1 = time.time()
>     main ()
>     print '=> it took total ', time.time() - t1, 'seconds to complete'
>
> </code>
>
> <traceback>
>
> >pythonw -u "test_blob.py"
> 0.155999898911 seconds for  testdocs\business plan.doc
> 0.0160000324249 seconds for  testdocs\concept2businessprocess.pdf
> 0.0160000324249 seconds for  testdocs\diagram.vsd
> 0.0149998664856 seconds for  testdocs\logo.jpg
> Traceback (most recent call last):
>   File "test_blob.py", line 59, in ?
>     main ()
>   File "test_blob.py", line 53, in main
>     populate_table(cursor)
>   File "test_blob.py", line 44, in populate_table
>     cursor.execute('''insert into tstable (id, name, data) values
> (NULL, '%s', '%s')''' % (filename, data))
>   File "C:\Engines\Python23\Lib\site-packages\MySQLdb\cursors.py",
> line 95, in execute
>     return self._execute(query, args)
>   File "C:\Engines\Python23\Lib\site-packages\MySQLdb\cursors.py",
> line 114, in _execute
>     self.errorhandler(self, exc, value)
>   File "C:\Engines\Python23\Lib\site-packages\MySQLdb\connections.py",
> line 33, in defaulterrorhandler
>     raise errorclass, errorvalue
> _mysql_exceptions.OperationalError: (2006, 'MySQL server has gone
> away')
> >Exit code: 1
>
> </traceback>
>
> My Questions are:
>
> - Is my test code at fault?
>
> - Is this the wrong approach to begin with: i.e. is it a bad idea to
>   store the data itself in the database?
>
> - Am I using the wrong database? (or is the connector just buggy?)
>
>
> Thanks to all.
>
> best regards,
>
> Sandy Norton




From miki.tebeka at zoran.com  Sun Jan 11 12:36:36 2004
From: miki.tebeka at zoran.com (Miki Tebeka)
Date: 11 Jan 2004 09:36:36 -0800
Subject: How to globalize vars ???
References: <mailman.224.1073662205.12720.python-list@python.org>
Message-ID: <4f0a9fdb.0401110936.76e8a2e6@posting.google.com>

Hello,

Warning: Fix not tested.

> def SSInit(SessionDir):
      global SSDefaultDir # FIX
>     SSLock()
>     try:
>       if SSDefaultDir.strip()=="":
> #       <-
> # UnboundLocalError: local variable 'SSDefaultDir' referenced before assignment
>          SSDefaultDir=SessionDir
>     finally:
>       SSUnlock()

> Why ? How to force python to module see his variable ?
By definition all new variables are local to their function.

HTH.
Miki


From martin at v.loewis.de  Sun Jan 25 13:27:22 2004
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 25 Jan 2004 19:27:22 +0100
Subject: xrange not hashable - why not?
In-Reply-To: <mailman.764.1075042048.12720.python-list@python.org>
References: <mailman.764.1075042048.12720.python-list@python.org>
Message-ID: <bv11q9$cg9$03$2@news.t-online.com>

Gerrit Holl wrote:
> why is an xrange object not hashable?

Because they don't have a notion of equality
beyond identity.

Regards,
Martin



From no at spam.invalid  Thu Jan 15 15:02:46 2004
From: no at spam.invalid (Russell E. Owen)
Date: Thu, 15 Jan 2004 12:02:46 -0800
Subject: Tcl/Tk Support
References: <E1Af0F7-0003lB-L4@mail.python.org>
	<20040109201513.GC2810@unpythonic.net>
	<mailman.406.1074188662.12720.python-list@python.org>
Message-ID: <bu6rl8$ncg$1@nntp6.u.washington.edu>

In article <mailman.406.1074188662.12720.python-list at python.org>,
 "Diego Ribeiro de Andrade" <diego.andrade at smartech.com.br> wrote:

>Yeah! It Works Thanks.
>
> Everyone else told me that It was native in Python. May I did something
>wrong in the installation of Red Hat9?

I doubt you did anything wrong. RH9 seems to come with a python that has 
no Tkinter support, despite the fact that RH9 also includes tcl/tk.

Personally I think it's good that Python has more than one GUI option, 
but a pity that it has no "native" GUI library that is sufficiently 
tightly integrated that a programmer can assume it will be present in 
any python installation. Tkinter is the closest thing Python has to such 
a standard, in that a source build automatically builds Tkinter if 
tcl/tk is available. But some OS vendors seem fond of leaving it out 
anyway (it is also missing in MacOS X).

-- Russell


From jcarlson at uci.edu  Tue Jan 20 20:18:19 2004
From: jcarlson at uci.edu (Josiah Carlson)
Date: Tue, 20 Jan 2004 17:18:19 -0800
Subject: Installing SpamBayes
References: <400c399b_2@newsfeed.slurp.net>
	<up5r00hr648soiun3j6q326ga9n808hf17@4ax.com>
	<400c451a_1@newsfeed.slurp.net>
	<20040120135921.1C3F.JCARLSON@uci.edu>
	<400c5790_1@newsfeed.slurp.net>
	<20040120150005.1C48.JCARLSON@uci.edu>
	<400c6146_1@newsfeed.slurp.net>
Message-ID: <20040120171127.0606.JCARLSON@uci.edu>


Here is an example set of interactions I did with my command line:

Microsoft Windows 2000 [Version 5.00.2195]
(C) Copyright 1985-2000 Microsoft Corp.

C:\>cd "Documents and Settings"

C:\Documents and Settings>cd jcarlson

C:\Documents and Settings\jcarlson>cd Desktop

C:\Documents and Settings\jcarlson\Desktop>cd ..

C:\Documents and Settings\jcarlson>cd \

C:\>d:

D:\>c:

C:\>


I hope that is enough of an example for you to figure out what is going
on. As to which path you need to change to, it is wherever you decided
to uncompress Spambayes.

A few things to note.  On Windows 2000/xp:
C:\Documents and Settings\<user name>\Desktop is the default location of
your desktop.
c:\Documents and Settings\<user name>\My Documents is the default location
of your 'My Documents' folder..


If this isn't enough, then Jeebus help you.

 - Josiah


> I think that may be my problem.  I am not sure how to change the path to
> where the setup.py file is...
> 
> > > That didnt work either and the file assoc. are correct.
> > >
> > > > If you are in windows and your associations are correct, try:
> > > > setup.py install
> >
> > Steps for you to help us help you:
> > 1. Open up a console.
> > 2. Change to the proper path.
> > 3. Run (without the single quotes)
> >   'python setup.py install'
> >  if that doesn't work, try
> >   'setup.py install'
> > 4. Copy and paste the output in a message here.
> >
> >  - Josiah
> >
> 



From gerrit at nl.linux.org  Sat Jan 10 11:57:02 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Sat, 10 Jan 2004 17:57:02 +0100
Subject: De Zen van VDVL's Python
In-Reply-To: <10009bujbbsn8b5@corp.supernews.com>
References: <3ffddcfd$0$16662$ba620e4c@news.skynet.be>
	<5unrvv8u1vpske1j464epj4aff0f54k2nf@4ax.com>
	<UilLb.1570$nt4.1692@attbi_s51>
	<gLrLb.5136380$Of.812373@news.easynews.com>
	<3fff1245@usenet01.boi.hp.com>
	<400018e8$0$294$ba620e4c@news.skynet.be>
	<10009bujbbsn8b5@corp.supernews.com>
Message-ID: <20040110165702.GB17806@nl.linux.org>

Francis Avila wrote:
> Guido van Rossum created Python, and is currently its BDFL (Benevolent
> Dictator For Life).  He's Dutch.  It's a sort of an inside joke that Python
> makes sense if you're dutch (type 'import this' into an interactive Python
> prompt).

So he'r really the VDVL, Verlichte Despoot Voor het Leven :)
Shouldn't the Zen of Python be translated?

De Zen van Python, door Tim Peters
vrij vertaald door ondergetekende

Mooi is beter dan lelijk.
Expliciet is beter dan impliciet.
Simpel is beter dan complex.
Complex is beter dan gecompliceerd.
Plat is beter dan genest.
Dun bezaaid is beter dan dicht bezaaid.
Leesbaarheid telt.
Speciale gevallen zijn niet speciaal genoeg om de regels te overtreden.
Maar de praktijk gaat voor de zuiverheid.
Foutmeldingen horen nooit genegeerd worden.
Behalve expliciet.
Weersta de verleiding tot raden bij onduidelijkheden.
Er hoort een - bij voorkeur slechts een - duidelijke oplossing te zijn.
Maar die lijkt misschien niet meteen duidelijk voor niet-Nederlanders.
Beter nu dan nooit.
Maar vaak is nooit beter dan *nu meteen*.
Als het moeilijk is uit te leggen, is het een slecht idee.
Als het makkelijk is uit te leggen, is het misschien een goed idee.
Namespaces zijn een ... goed idee -- daar doen we er meer van!

groetjes,
Gerrit :).

-- 
185. If a man adopt a child and to his name as son, and rear him, this
grown son can not be demanded back again.
          -- 1780 BC, Hammurabi, Code of Law
-- 
PrePEP: Builtin path type
    http://people.nl.linux.org/~gerrit/creaties/path/pep-xxxx.html
Asperger's Syndrome - a personal approach:
	http://people.nl.linux.org/~gerrit/english/



From mwh at python.net  Tue Jan 13 06:38:37 2004
From: mwh at python.net (Michael Hudson)
Date: Tue, 13 Jan 2004 11:38:37 GMT
Subject: Why learn Python ??
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<877jzwg1v2.fsf@pobox.com> <1006h25r6623m45@corp.supernews.com>
Message-ID: <m3u130xemc.fsf@pc150.maths.bris.ac.uk>

claird at lairds.com (Cameron Laird) writes:

> In article <877jzwg1v2.fsf at pobox.com>, John J. Lee <jjl at pobox.com> wrote:
> 			.
> 		[pages of marvelously
> 		precise analysis]
> 			.
> 			.
> >Eiffel: Design by contract.  The book to read is Meyer's "Object-
> > Oriented Software Construction".  Full of interesting stuff, if you can
> > stand his self-importance ;-).
> 			.
> 			.
> 			.
> Mostly I'm writing just to applaud--this post had a lot
> of value to it.  The largest quibble I could find in its
> scores of lines was the failure to mention that *OOSC*
> is valuable reading for OO programmers working in *any*
> language, not just Eiffel.  *OOSC* is like *SICP* in 
> that regards; it towers not just over the competition, 
> but also any apparent limit imposed by its language of
> expression.

I would also say that OOSC is one of those books that's at least as
interesting when it's *wrong* than when it's right.

Cheers,
mwh

-- 
  You sound surprised.  We're talking about a government department
  here - they have procedures, not intelligence.
                                            -- Ben Hutchings, cam.misc


From CousinStanley at hotmail.com  Fri Jan 16 17:16:00 2004
From: CousinStanley at hotmail.com (Cousin Stanley)
Date: Fri, 16 Jan 2004 15:16:00 -0700
Subject: py2exe 0.5.0 (finally) released
References: <y8s7aeps.fsf@python.net>
Message-ID: <bu9nnl$eklsj$1@ID-130333.news.uni-berlin.de>

| http://starship.python.net/crew/theller/py2exe

Thomas .... 

    This is my first attempt at running any version of py2exe .... 

    Using ....

        Win98_SE
        Python 2.3 Enthought Edition
        py2exe 0.50 

    The samples  hello.py  and  test_wx.py  in the simple folder 
    function as expected when run as python scripts ....

    setup.py goes through the motions and creates
    the  build  and  dist directories and the following
    files are produced in .... /simple/dist ....

        hello.exe
        library.zip
        python23.dll
        w9xpopen.exe
        wxc.pyd
        wxmsw24.dll
        _sre.pyd
   
    hello.exe will not run .... 

        Could not locate script resource:
 
    The following Traceback from  setup.py  indicates 
    that  unicows.dll  seems to be missing .... 

python setup.py py2exe > py2exe_simple.txt
Traceback (most recent call last):
  File "setup.py", line 34, in ?
    console = ["hello.py"],
  File ".\distutils\core.py", line 149, in setup
  File ".\distutils\dist.py", line 907, in run_commands
  File ".\distutils\dist.py", line 927, in run_command
  File "K:\PYTHON23\Lib\site-packages\py2exe\build_exe.py", line 197, in run
    self.create_binaries(py_files, extensions, dlls)
  File "K:\PYTHON23\Lib\site-packages\py2exe\build_exe.py", line 391, in create_
binaries
    arcname, target.script)
  File "K:\PYTHON23\Lib\site-packages\py2exe\build_exe.py", line 566, in build_e
xecutable
    add_resource(unicode(exe_path), script_bytes, u"PYTHONSCRIPT", 1, True)
RuntimeError: this function requires unicows.dll in the Python directory on Win
95/98/Me
  
    I found one version of unicows.dll that was previously installed
    with another program, OE-Quote-fix,  and stuck it in the Python folder, 
    but then Python page faulted from setup.py .... 

    Will a different/current version of unicows.dll
    in the Python folder alieviate this problem ????


-- 
Cousin Stanley
Human Being
Phoenix, Arizona



From omission9 at invalid.email.info  Sun Jan 25 21:33:11 2004
From: omission9 at invalid.email.info (omission9)
Date: Mon, 26 Jan 2004 02:33:11 GMT
Subject: efficient updating of nested dictionaries
Message-ID: <H%_Qb.2609$925.1917@nwrddc02.gnilink.net>

I have a dictionary that looks like this
MY_DICT[KEY_X][KEY_Y][KEY_Z]=FOO

I am having a problem updating this with a simple 
MY_DICT.update(NEW_DICT) as update doesn't seem to care about getting 
into the inner dicts.
Getting the keys of each and iterating through and updating each one is 
terribly slow as the number of keys gets bigger and bigger.
What is the bst way to update my nested dicts?





From exarkun at intarweb.us  Fri Jan 30 13:40:44 2004
From: exarkun at intarweb.us (Jp Calderone)
Date: Fri, 30 Jan 2004 13:40:44 -0500
Subject: Tcp/ip programs in python
In-Reply-To: <bve7n1+b7ud@eGroups.com>
References: <bve7n1+b7ud@eGroups.com>
Message-ID: <20040130184044.GA30420@intarweb.us>

On Fri, Jan 30, 2004 at 06:27:45PM -0000, M.Dikmen wrote:
> Do you now a source about socket programming in python? or some source
> codes, demo programs? i really need them
> 

  In order of increasing relevance:

    http://www.google.com/

    http://www.vex.net/parnassus/

    http://www.twistedmatrix.com/

  Jp




From merkosh at hadiko.de  Tue Jan 20 19:14:51 2004
From: merkosh at hadiko.de (Uwe Mayer)
Date: Wed, 21 Jan 2004 01:14:51 +0100
Subject: always the same object (2)
Message-ID: <bukg9s$6e7$1@news.rz.uni-karlsruhe.de>

Hi,

sorry for the lack of source code. 
Here again:

I use struct.unpack() to unpack data from a binary file and pass the
returned tuple as parameter to __init__ of a class that's supposed to
handle the data:

class DataWrapper():
        data = { }
        def __init__(self, arg): #arg will contain a tuple
                data['var1'], data['var2'] = arg


result = [ ]
while not <end-of-file f>:
        data = struc.unpack("4s4s", f.read(8)) 
        record = DataWrapper( data ) # pass tuple from unpack 
        result.append( record )

Then "result" contains a list with different objects, but the strings 
in data['var1'] and data['var2'] are all the same.

Any ideas how to avoid this?

Thanks again
Ciao
Uwe


From sombDELETE at pobox.ru  Sat Jan 24 13:00:17 2004
From: sombDELETE at pobox.ru (Serge Orlov)
Date: Sat, 24 Jan 2004 21:00:17 +0300
Subject: Perl vs. Python for text manipulation
References: <69A0D4AB81C51447AD6BA387782B8D64093D8A@midl-mail4.etcconnect.com>
	<871xpp1i8r.fsf@pobox.com> <ou4qulnwy0.fsf@andlx-anamika.cisco.com>
	<buu6j5$12lf$1@nadya.doma> <buu7pq$i67$1@panix1.panix.com>
Message-ID: <buubrh$183r$1@nadya.doma>


"Aahz" <aahz at pythoncraft.com> wrote in message news:buu7pq$i67$1 at panix1.panix.com...
> In article <buu6j5$12lf$1 at nadya.doma>, Serge Orlov <sombDELETE at pobox.ru> wrote:
> >"Ganesan R" <rganesan at myrealbox.com> wrote in message news:ou4qulnwy0.fsf at andlx-anamika.cisco.com...
> >>
> >> fileinput is not optimized yet, at least I don't remember any mails
> >> about fileinput in python-devel since python 2.3 was released.  I
> >> know that it is slow. for line in file: does seem to be optimized
> >> though. The last time I ran the tests python was definitely twice as
> >> slow (which was before python 2.3 was officially released); now it
> >> appears to be only about 40% slower. I need to revisit these crude
> >> benchmarks.
> >
> >Since this problem is not IO bound but rather python internals bound,
> >it makes sense to try psyco.
>
> Pysco won't help and might actually make things worse.

Sorry, I was dreaming :) I was dreaming about the day when psyco can
recognize the file use pattern and optimize the hell out it. Of course this
optimization is not there at this time.

> At this point,
> Perl's speed advantage should come from two and only two sources: Perl
> optimizes the snot out of platform I/O (so these speed tests don't apply
> to a platform Perl hasn't been ported to), and Perl does not use the
> thread-safe forms of I/O.  Python does a fair amount of internal caching
> to make up for that, and the file object is already written in C.

I'm not sure I understand what does it mean "optimize the snot out of
platform I/O"? You just use the bare bones non-caching API and do your
own simple caching doing as little as possible. This will allow programs
that work with files as streams (read sequentially a lot from one file, write
sequentially to another) to run at top speed. Other access patterns may
suffer but not very much.
As for threads, is it required that after one thread .write() the other thread
can immediately .read() what the first thread wrote? If not, threads can
have separate caching. After all, doing I/O on the same file from multipile
threads is uncommon so it can suffer. 99+ percent of I/O in the world <wink>
is done from one thread, why should it suffer?

-- Serge.





From claird at lairds.com  Thu Jan 15 08:16:35 2004
From: claird at lairds.com (Cameron Laird)
Date: Thu, 15 Jan 2004 13:16:35 -0000
Subject: C++ bad-mouthing (was: Why learn Python ??)
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<878yka2sze.fsf@pobox.com> <100bbekd61fbl53@corp.supernews.com>
	<Xns94711F202CED8JanC@213.119.4.35>
Message-ID: <100d4ljnic3l465@corp.supernews.com>

In article <Xns94711F202CED8JanC at 213.119.4.35>,
JanC  <usenet at janc.cjb.net> wrote:
>claird at lairds.com (Cameron Laird) schreef:
>
>>>Not sure what the goals were, but I'm not sure they were to compete
>>>with Netscape and IE.  CNRI funding -- "R" for research -- seems to
>
>> Certainly not the *original* goal, because Grail antedated those
>> latecomers. 
>
>My copy of Netscape 0.94beta for Windows has a file date of 1994-11-22.
>
>And from the Grail docs:
>"Grail was started in August 1995 as a quick and dirty demo. It quickly 
>became a serious project, as witnessed by the release of version 0.2 in 
>November 1995, and again by the planned release of version 0.3 (currently 
>in beta) in June 1996."
			.
			.
			.
Yikes!  Good research--and I'm always in favor of that.
I apologize for my error.  It's certainly disquieting;
I had such a strong memory that Grail was around in 
mid-'94 that I didn't verify the facts.  What *was* I
thinking about?

Thanks for correcting the mistake.
-- 

Cameron Laird <claird at phaseit.net>
Business:  http://www.Phaseit.net


From mwh at python.net  Mon Jan 19 06:24:23 2004
From: mwh at python.net (Michael Hudson)
Date: Mon, 19 Jan 2004 11:24:23 GMT
Subject: Where to post an article?
References: <4f0a9fdb.0401181356.79a1ec87@posting.google.com>
Message-ID: <m3brp06v14.fsf@pc150.maths.bris.ac.uk>

miki.tebeka at zoran.com (Miki Tebeka) writes:

> Hello All,
> 
> I have a little article I'd like to publish.
> It's about how to use Python to repidly develop an assembler (2.5 days in my case).
> 
> Can you recommend a site/paper to publish it?
> 
> And yes, I have a web page...

Well, how about there?  Or you could try interesting pyzine.com in
it...

Cheers,
mwh

-- 
  Linux: Horse. Like a wild horse, fun to ride. Also prone to
  throwing you and stamping you into the ground because it doesn't
  like your socks.         -- Jim's pedigree of operating systems, asr


From jepler at unpythonic.net  Thu Jan 29 09:14:49 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Thu, 29 Jan 2004 08:14:49 -0600
Subject: popen2 with large input
In-Reply-To: <afc115ec.0401290511.3c3b2d40@posting.google.com>
References: <afc115ec.0401290511.3c3b2d40@posting.google.com>
Message-ID: <20040129141449.GA18498@unpythonic.net>

The connection to the child process created by the popen family have
some inherent maximum size for data "in flight".  I'm not sure how to
find out what that value is, but it might be anywhere from a few bytes
to a few K.

So tr starts to write its output as it gets input, but you won't read
its output before you've written all your output.  If the size of tr's
output is bigger than the size of the buffer for tr's unread output,
you'll deadlock.

As an aside, the particular problem you pose can be solved with Python's
str.translate method.  If the actual goal is to "work like tr", then use
that instead and forget about popen.

Anyway, to solve the popen2 problem, you'll need to write something like this:
[untested, and as you can see there's lots of pseudocode]
    def getoutput( command, input ):
        r, w = popen2(command)
        rr = [r]; ww = [w]
        output = []
        set r and w nonblocking
        while 1:
            _r, _w, _ = select.select(rr, ww, [], 0)

            if _w:
                write some stuff from input to w
                if nothing left:
                    w.close(); ww = []
            if _r:
                read some stuff into output
                if nothing to read:
                    handle the fact that r was closed
                    if w was closed: break
                    else: probably an error condition
        return "".join(output)

You could also write 'input' into a temporary file and use
commands.getoutput() or os.popen(.., "r").

Jeff



From nomail at nospam.net  Mon Jan 12 04:51:48 2004
From: nomail at nospam.net (Olaf Meyer)
Date: Mon, 12 Jan 2004 09:51:48 GMT
Subject: Python 2.3.3 compilation problems an HP-UX
In-Reply-To: <btmqaj$1fl$1@panix2.panix.com>
References: <aHwLb.6203$g4.135307@news2.nokia.com>
	<btmqaj$1fl$1@panix2.panix.com>
Message-ID: <U6uMb.6320$g4.137184@news2.nokia.com>

Aahz wrote:

> In article <aHwLb.6203$g4.135307 at news2.nokia.com>,
> Olaf Meyer  <nomail at nospam.net> wrote:
> 
>>I'm having some problems compiling Python 2.3.3 on HP-UX (B.11.00).
>>I've tried sevral different options for the configure script (e.g. 
>>enabling/disabling gcc, aCC) but I always get the same problem during 
>>the final linking stage. Several PyThread_* symbols are undefined (for 
>>details see the output below).
> 
> 
> I'd suggest that you look at the recent threads about compiling for
> HP-UX on python-dev.  It's starting to look like a SIG might be a good
> way to go.

Thanks for pointing me there. It seems that there's some clean-up needed 
for HP-UX. Luckily compiling 2.2.1 works fine for me, so I think I'll 
stick with it until the 2.3 versions compile with HP-UX 'out-of-the-box' ;-)

Olaf


From aahz at pythoncraft.com  Tue Jan 27 20:13:52 2004
From: aahz at pythoncraft.com (Aahz)
Date: 27 Jan 2004 20:13:52 -0500
Subject: Upgrading to Python 3.0 Questions
References: <bv6uuc$og309$1@ID-221199.news.uni-berlin.de>
Message-ID: <bv72cg$ger$1@panix3.panix.com>

In article <bv6uuc$og309$1 at ID-221199.news.uni-berlin.de>,
Zachary <Z_kline at hotmail.com> wrote:
>
>I've heard some rumors about Python 3.0.  I am wondering what sort of
>upgrading I'll have to do, as I have also heard people on this group
>asking us to use certain modules or operators or whatever.  Is it a
>major sort of upgrade?  What would I need to do to prepare for it?

Rumors are the only thing available at this point.  Don't worry about it.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

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


From jzgoda at gazeta.usun.pl  Fri Jan 23 14:54:23 2004
From: jzgoda at gazeta.usun.pl (Jarek Zgoda)
Date: Fri, 23 Jan 2004 19:54:23 +0000 (UTC)
Subject: wxPython question
References: <5sKcnU3qx-sP1Y3dRTvaKA@news.rockefeller.edu>
Message-ID: <buru5e$qt2$1@nemesis.news.tpi.pl>

Chad Haynes <haynesc at rockefeller.edu> pisze:

> Is there a way to change the background color of a wxCheckBox in 
> wxPython?  Using the SetBackgroundColor function will change the 
> background of any label attached to the checkbox, but I want to change 
> the color of the actual box.

I think that its color depends on GUI toolkit. At least native Win32
checkbox control don't allow such manipulation.

-- 
Jarek Zgoda
Unregistered Linux User #-1
http://www.zgoda.biz/ JID:zgoda-a-chrome.pl http://zgoda.jogger.pl/


From gerrit at nl.linux.org  Wed Jan  7 09:29:43 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Wed, 7 Jan 2004 15:29:43 +0100
Subject: Pre-PEP: Dynamically evaluating default function arguments
In-Reply-To: <338366A6D2E2CA4C9DAEAE652E12A1DE010633FF@au3010avexu1.global.avaya.com>
References: <338366A6D2E2CA4C9DAEAE652E12A1DE010633FF@au3010avexu1.global.avaya.com>
Message-ID: <20040107142943.GA2283@nl.linux.org>

Delaney, Timothy C (Timothy) wrote:
> IMO it's not a waste of time for this PEP to be written. Unfortunately, not many people are willing to formally document something that they would like to see when the guaranteed result is that it will be rejected.

PEP 313?

:)

Gerrit.

-- 
203. If a free-born man strike the body of another free-born man or
equal rank, he shall pay one gold mina.
          -- 1780 BC, Hammurabi, Code of Law
-- 
PrePEP: Builtin path type
    http://people.nl.linux.org/~gerrit/creaties/path/pep-xxxx.html
Asperger's Syndrome - a personal approach:
	http://people.nl.linux.org/~gerrit/english/



From grelens at NOSPAMyahoo.NOTNEEDEDfr  Sat Jan 17 05:30:09 2004
From: grelens at NOSPAMyahoo.NOTNEEDEDfr (GrelEns)
Date: Sat, 17 Jan 2004 11:30:09 +0100
Subject: help with cr in reg exp...
Message-ID: <4009126a$0$22321$626a54ce@news.free.fr>

hello,

i had a trouble with re that i didn't understand (this is a silly example to
show, to parse html i use sgmllib) :
having this string :

>>> s = """<form name="test" method="post" action="test.php">
<input type="text" name="title" size="1." value="test...">
<br>
<a href="help.php">help</a>
</form>"""

why do i get :

>>> p = re.compile("(?=<form|<FORM).*(?=</form>|</FORM>)"); p.findall(s)
[]

while i was expected this kind of behaviour :
['form name="test" method="post" action="test.php">\n<input type="text"
name="title" size="1." value="test...">\n<br>\n<a href="help.php">help</a>']

which what i nearly get with :
>>> p = re.compile("(?=<form|<FORM).*(?=</form>|</FORM>)");
p.findall(s.replace('\n', ''))
['<form name="test" method="post" action="test.php"><input type="text"
name="title" size="1." value="test..."><br><a href="help.php">help</a> ']

it looks like \n isn't matched by . (dot)* in my re while i though (and
need) it should, i must be missing something.

thanks!




From mcfletch at rogers.com  Thu Jan 29 20:00:41 2004
From: mcfletch at rogers.com (Mike C. Fletcher)
Date: Thu, 29 Jan 2004 20:00:41 -0500
Subject: Easy way to make EXEs...
In-Reply-To: <yzhSb.1910$jH6.736@newsread1.news.atl.earthlink.net>
References: <NMDRb.28013$i4.26542@newsread1.news.atl.earthlink.net>	<4017C45F.D7501215@engcorp.com>
	<yzhSb.1910$jH6.736@newsread1.news.atl.earthlink.net>
Message-ID: <4019ACB9.60605@rogers.com>

Xero Limit 126 wrote:
...

>SystemExit: usage: setup [global_opts] cmd1 [cmd1_opts] [cmd2 [cmd2_opts]
>...]
>   or: setup --help [cmd1 cmd2 ...]
>   or: setup --help-commands
>   or: setup cmd --help
>
>error: no commands supplied
>--------------------------
>  
>
setup.py requires that you specify which command, such as "install", 
"bdist_wininst", or in your case "py2exe" you want to run.  Distutils 
(the source of the setup.py functionality) is a large package with many 
operations beyond  creating an exe.  Try:

        python setup.py py2exe

And see if that gets you farther.

Good luck,
Mike

_______________________________________
  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://members.rogers.com/mcfletch/





From Pekka.Pessi at nokia.com  Sat Jan  3 11:33:33 2004
From: Pekka.Pessi at nokia.com (Pekka Pessi)
Date: Sat, 03 Jan 2004 18:33:33 +0200
Subject: "literal" objects
References: <%QbGb.2109$1f6.732@newssvr25.news.prodigy.com>
Message-ID: <pvy8spgffm.fsf@nokia.com>

"Moosebumps" <purely at unadulterated.nonsense> writes:
>mystruct x = { 3, 5.0f };
>mystruct y = { 5, 15.0f };

>These are just "data".  Obviously in python you could just write an init
>function like this:

>x.a = 3;
>x.b = 5;

>y.a = 5;
>y.b = 15;

>And that would work fine, but the programmer in me says that that's a pretty
>inelegant way to do it.  Why execute code when all you need is to put data
>in the program?

This depends what you plant to do. Easiest way to initialize the
__dict__ is with code something like this:

class AnyStruct:
    def __init__(self, **kw):
	self.__dict__.update(kw)

The ** in the __init__ signature means that it puts all named arguments
in the dictionary kw. 

You can then use your structure class like this:

x = AnyStruct(a = 3, b = 5)

Of course, this is "nice" trick to utilize whenever you initialize an
instance.

If you have some mandatory argument, you can require that callers sets
them with

class MyStruct:
    def __init__(self, a, b, **kw):
	self.a = a
	self.b = b
	self.__dict__.update(kw)

then

x = MyStruct(3, 5)

does same as

x = MyStruct(a = 3, b = 5)

but the latter is a bit more readable.

--Pekka


From newsgroups at jhrothjr.com  Sat Jan  3 08:08:01 2004
From: newsgroups at jhrothjr.com (John Roth)
Date: Sat, 3 Jan 2004 08:08:01 -0500
Subject: Creating a capabilities-based restricted execution system
References: <LmmdnUn4seDeGWuiXTWc-w@speakeasy.net>
Message-ID: <vvdfljlg0gce9c@news.supernews.com>


"Sean R. Lynch" <seanl at chaosring.org> wrote in message
news:LmmdnUn4seDeGWuiXTWc-w at speakeasy.net...

[...]

> Does anyone think I'm going in completely the wrong direction here? Am I
> missing anything obvious?

Yes,  you're missing something really obvious. Multi-level
security is a real difficult problem if you want to solve it
in a believable (that is, bullet-proof) fashion. The only way
I know of solving it is to provide separate execution
environments for the different privilege domains.
In the current Python structure, that means different
interpreters so that the object structures don't intermix.

If you have separate domains, then the only support
needed is to remove privileged modules from the
built-ins, and virtualize import so that it won't load
modules that aren't on the approved list for that
domain.

You also, of course, need some form of gate between
the untrusted and trusted domains.

Once that's done, there's no reason to layer additional
complexity on top, and there is no reason to restrict
any introspection facilities.

John Roth




From peter at engcorp.com  Fri Jan 16 09:21:46 2004
From: peter at engcorp.com (Peter Hansen)
Date: Fri, 16 Jan 2004 09:21:46 -0500
Subject: Binary strings, unicode and encodings
References: <265368cb.0401151138.37a3a47b@posting.google.com>
	<4006F13C.7D432B98@engcorp.com>
	<265368cb.0401151419.7663823e@posting.google.com>
Message-ID: <4007F37A.6D26C83@engcorp.com>

Laurent Therond wrote:
> 
> So, your test revealed that StringIO converts to byte strings.
> Does that mean:
>     - If the input string contains characters that cannot be encoded
> in ASCII, bencode_rec will fail?

Yes, if your default encoding is ASCII.

> Yet, if your locale specifies UTF-8 as the default encoding, it should
> not fail, right?

True, provided you are actually creating UTF-8 strings...  just sticking
in a character that has the 8th bit set doesn't mean the string is UTF-8
of course.

> Hence, I conclude your test was made on a system that uses ASCII/ISO
> 8859-1 as its default encoding. Is that right?

Correct, Windows 98, sys.getdefaultencoding() returns 'ascii'.

> > > c) It depends on the system locale/it depends on what the site module
> > > specifies using setdefaultencoding(name)
> >
> > Yes, as it always does if you are using Unicode but converting to byte strings
> > as it appears StringIO does.
> 
> Umm...not sure here...I think StringIO must behave differently
> depending on your locale and depending on how you assigned the string.

It's always possible that StringIO takes locale into account in some
special way, but I suspect it does not.  As for "how you assigned the string"
I'm not sure I understand what that might mean.  How many ways do you know
to assign a string in Python?

-Peter


From mir4uu at yahoo.com  Mon Jan  5 07:34:28 2004
From: mir4uu at yahoo.com (mir nazim)
Date: 5 Jan 2004 04:34:28 -0800
Subject: Help: wxPython tutorials
Message-ID: <425cc8d1.0401050434.235ca633@posting.google.com>

hi,
i am in urgent need of a good refrence material for wxPython. goo docs
will also do.(i already have wxWindows library refrence. but it is too
hectic for me to traverse throught it).
please help.


From syver at inout.no  Fri Jan 16 11:16:21 2004
From: syver at inout.no (Syver Enstad)
Date: 16 Jan 2004 17:16:21 +0100
Subject: Very strange unicode behaviour
Message-ID: <uisjbrhre.fsf@inout.no>


Here's the interactive session

Python 2.2.2 (#37, Oct 14 2002, 17:02:34) [MSC 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> ord('\xe5')
229
>>> '\xe5'.find(u'')
-1
>>> 'p\xe5'.find(u'')
UnicodeError: ASCII decoding error: ordinal not in range(128)
>>> 'p\xe4'.find(u'')
-1
>>> 'p\xe5'.find(u'')
UnicodeError: ASCII decoding error: ordinal not in range(128)
>>> print '\xe5'
?
>>> print 'p\xe5'
p?
>>> 'p\xe5'
'p\xe5'
>>> def func():
...     try:
...         '\xe5'.find(u'')
...     except UnicodeError:
...         pass
...
>>> func()
>>> for each in range(1):
...     func()
...
UnicodeError: ASCII decoding error: ordinal not in range(128)
>>>

It's weird that \xe5 throws and not \xe4 but even weirder that the
exception is not cleared so that the loop reports it.

Is this behaviour the same on Python 2.3?




From skip at pobox.com  Wed Jan 14 11:57:54 2004
From: skip at pobox.com (Skip Montanaro)
Date: Wed, 14 Jan 2004 10:57:54 -0600
Subject: Safe prime numbers in Python
In-Reply-To: <16389.28642.425686.771599@montanaro.dyndns.org>
References: <200401140639.i0E6dxt09128@mail001.syd.optusnet.com.au>
	<mailman.349.1074082578.12720.python-list@python.org>
	<4005725d$1@nntp0.pdx.net>
	<16389.28642.425686.771599@montanaro.dyndns.org>
Message-ID: <16389.29970.183928.30299@montanaro.dyndns.org>


Ack...  I'm an idiot:

    Skip>     def safe_primes(last=1):
    Skip>         last = long((last-1)/2)   # assuming future float division...

should be         last = (last-1)//2        # doh!

    Skip>         while True:
    Skip>             last = gmpy.next_prime(last)
    Skip>             other = last * 2 + 1
    Skip>             if gmpy.is_prime(other):
    Skip>                 yield other

Skip



From swalters_usenet at yahoo.com  Sun Jan 11 02:43:14 2004
From: swalters_usenet at yahoo.com (Samuel Walters)
Date: Sun, 11 Jan 2004 07:43:14 GMT
Subject: what is best for web development??
References: <f046efac.0401100358.5aa812a0@posting.google.com>
Message-ID: <pan.2004.01.11.07.41.53.736815@yahoo.com>

|Thus Spake ketulp_barod On the now historical date of Sat, 10 Jan 2004
03:58:09 -0800|

> i am developing a web application and i am really confused on what
> should i use. should i use just python and use the cgi module availabe.
> Or should i use application like WebWare.Also there is PSP available. I
> am really confused and need help

Follow the advice given elsewhere in this thread, but also look at PHP,
which is another web-programming language. It's not difficult to pick up
if you have a grounding in C, and understand HTML, but it does have its
issues.  It is best for getting web pages to talk to databases.  The
nicest thing about it is that it was developed *for* creating dynamic
web-pages, so it has a good tool-box for that sort of thing.

HTH

Sam Walters.

-- 
Never forget the halloween documents.
http://www.opensource.org/halloween/
""" Where will Microsoft try to drag you today?
    Do you really want to go there?"""



From davidb at mcs.st-and.ac.uk  Tue Jan 13 17:35:13 2004
From: davidb at mcs.st-and.ac.uk (David Boddie)
Date: 13 Jan 2004 14:35:13 -0800
Subject: Help in unwrapping a PyObject* returned by an embedded Python
	function
References: <mailman.256.1073699227.12720.python-list@python.org>	<200401120930.i0C9UTmq032356@se-126.se.wtb.tue.nl>
	<mailman.302.1073927909.12720.python-list@python.org>
Message-ID: <4de76ee2.0401131435.3d66be95@posting.google.com>

Read Roberts <rroberts at adobe.com> wrote in message news:<mailman.302.1073927909.12720.python-list at python.org>...

[Returning a string/tuple to a C function]

> In fact, I did try all combinations of
> 
> in the  Python call-back function :
> 	return myString
> 	return (myString)
> 
> and, in the  C calling function,
> 
> 	PyArg_ParseTuple(pyStringResult, "s", myString)
> 	PyArg_ParseTuple(pyStringResult, "(s)", myString)

I'm guessing here but, if you want to pass tuples around, have you tried
using the second form of each of the above with the following correction
to the Python code?

    return (myString,)

> Also, the Python documentation (and other working code examples I 
> have)  indicate that 'PyArg_ParseTuple',  unlike BuildValues, always 
> assumes the arguments are supplied in a argument tuple, even if there 
> is only one argumen.

Maybe. I haven't really thought about it.

> I speculate that an argument list object, as required by 
> PyArg_ParseTuple, is not in fact  a simple tuple., and that 
> PyArg_ParseTuple cannot be used to parse a regular tuple. Any idea if 
> this is correct?

I think that there's been a misunderstanding. Since your original message,
and some unavailable reply were quoted below your last message, I think I
can see where it happened.

> >In comp.lang.python, you wrote:
> >
> >>  Why does PyArg_ParseTuple fail to parse a  return value which is a
> >>  tuple?
> >>
> >>  However, the following does not work:
> >>  from Python callback function:		return (myString)
> >>  in calling C function:
> >>  	if (!PyArg_ParseTuple(pyStringResult, "s", name)) {
> >>    		dbprintf(4, "c: failed to parse return value\n");
> >>  		PyErr_Clear();
> >>  	}
> >>  PyArg_ParseTuple fails, and returns NULL. How come? By the
> >>  documentation, I would think that PyArg_ParseTuple would parse any
> >>  Python tuple object.

I don't know whether it does or not, but you have returned a string!
This happened because you need to use a trailing comma within the
brackets. This tells the interpreter that the return value is not
simply a string enclosed in brackets. You can see this from the
following output from an interactive session in Python:

>>> "string"
'string'
>>> ("string")
'string'
>>> ("string",)
('string',)

In your original example, you returned a string and converted it
successfully to a char pointer. Presumably, you wanted a more
general solution in order to catch any non-string objects returned
and turned to PyArg_ParseTuple. Maybe you could put the returned
object in a tuple and call PyArg_ParseTuple on the result, but
there's surely an easier way to check the validity of the return
value.

Hope this helps,

David


From raneb at slingshot.co.nz  Mon Jan 26 14:28:28 2004
From: raneb at slingshot.co.nz (Rane Bowen)
Date: Tue, 27 Jan 2004 08:28:28 +1300
Subject: Optional Parameters in python COM
References: <bv1rek$oof$1@lust.ihug.co.nz>
Message-ID: <bv3pos$2no$1@lust.ihug.co.nz>

<bump>

"Rane Bowen" <raneb at slingshot.co.nz> wrote in message
news:bv1rek$oof$1 at lust.ihug.co.nz...
> Hi,
>
> I am using python with a makepy generated wrapper on a COM application.
One
> of this object's methods has 3 parameters, two of which are optional.
> If I call the method with just the non-optional parameter, or all three
> parameters, it works.  If I call it with the first two parameters, I get
the
> following error:
>
> (-2147352567, 'Exception occurred.', (0, 'Amphora.Session.1', 'A bad
> parameter was passed to the method', None, 0, -1610547133), None)
>
> I have tried calling the method by using the names of the optional
> parameters, and I have also tried using pythoncom.Missing and
> pythoncom.Empty for the non essential parameter.  I have also edited the
> generated .py file so that it contains the following:
>
> defaultNamedOptArg=pythoncom.Empty
> defaultNamedNotOptArg=pythoncom.Empty
> defaultUnnamedArg=pythoncom.Empty
>
> But this has not made any difference!  Any help would be very much
> appreciated.
>
> Cheers,
>
> Rane
>
>




From JoeyTaj at netzero.com  Thu Jan  8 10:42:14 2004
From: JoeyTaj at netzero.com (Paradox)
Date: 8 Jan 2004 07:42:14 -0800
Subject: Calling a function dynamically
Message-ID: <924a9f9c.0401080742.39eba581@posting.google.com>

I would like to call a function whose name I supply at runtime.
Something like this but it didn't work

functionName = 'run'
instance = ClassDef()
args = [1, 2]

#want the dynamic equivalant of
#instance.run(*args)

#This didn't work cause there was no __call__ attribute. Why?
value = instance.__call__[functionName](*args)




               Thanks Joey


From ad at ad.nl  Sun Jan 11 08:31:33 2004
From: ad at ad.nl (duikboot)
Date: Sun, 11 Jan 2004 14:31:33 +0100
Subject: Oracle to Mysql (dates) Help please
Message-ID: <btrj8h$oiq$1@news3.tilbu1.nb.home.nl>

Hi all,

I'm trying to export a view tables from a Oracle database to a Mysql
database.  I create insert statements (they look alright), but it all goes
wrong when I try to execute them in Mysql, because the dates must have
quotes on each side.
I just don't know how make the dates right.
Well I'll just show you the code and some insert statements it generates.
Could anyone please help me?

Thanks,

Arjen

####Code####

import cx_Oracle
tabellen=["machine"]
con_oracle=cx_Oracle.connect("bla/bla")
c_oracle=con_oracle.cursor()

import MySQLdb
my=MySQLdb.Connect("localhost", db="bla")
my_mysql=my.cursor()
for tabel in tabellen:
    print tabel
    c_oracle.execute("select * from %s" % tabel)
    a_oracle=c_oracle.fetchone()
    #file=open("%s.sql" % tabel, 'w')
    while a_oracle != None:
        b=str(a_oracle)
        ins="insert into %s values %s;\n" % (tabel, b)
        #file.write(ins)
     my_mysql.execute(ins)
        #print ins

        a_oracle=c_oracle.fetchone()
    file.close()

con_oracle.close()

my.close()


##insert statement###

insert into machine values ('230KM', ' ', '230KM', 1980-01-01 00:00:00,
2035-01-01 00:00:00, 1, 100, 'asap', 'NO', 0, 0, 'corrugator', 2003-12-04
06:00:00, 1970-01-01 01:00:00, ' ', 'normal', 0.0, 0.0, 7, ' ', ' ',
'normal', ' ', ' ', 'A', 2003-12-04 09:42:14, 82766);




From max at alcyone.com  Fri Jan 23 05:47:19 2004
From: max at alcyone.com (Erik Max Francis)
Date: Fri, 23 Jan 2004 02:47:19 -0800
Subject: private class members and hasattr
References: <mailman.677.1074846642.12720.python-list@python.org>
Message-ID: <4010FBB7.B4692922@alcyone.com>

Dragos Chirila wrote:

> Why hasattr method doesn't return 1(true) for private member '__prop3'
> ??
> 
> I tested it with Python 2.2.1 and 2.1.3 .

Because a prefix double underscore (without a suffixed double
underscore, anyway) mangles the identifier with the intention of it
being private.  That is to say, trying to access a __private name from
another class is a good indication that you're doing something you're
not supposed to be doing.

-- 
 __ Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
/  \ San Jose, CA, USA && 37 20 N 121 53 W && &tSftDotIotE
\__/ I do not promise to consider race or religion in my appointments.
    I promise only that I will not consider them. -- John F. Kennedy


From peter at engcorp.com  Thu Jan  8 10:09:49 2004
From: peter at engcorp.com (Peter Hansen)
Date: Thu, 08 Jan 2004 10:09:49 -0500
Subject: PRE-PEP: new Path class
References: <1073567709.3ffd57dda8cb0@mcherm.com>
	<mailman.187.1073568366.12720.python-list@python.org>
Message-ID: <3FFD72BD.780554D8@engcorp.com>

Gerrit Holl wrote:
> 
> Michael Chermside wrote:
> > I agree... paths should be immutable.
> >
> > Instead of .normalize_inplace() which changes the behavior of the
> > Path, how about .get_normalized_string() (please find a better name)
> > which allows access to the normalized version without mutating the
> > Path object? (Or perhaps it should be .get_normalized_Path()... I'm
> > not sure.)
> 
> If we make it immutable, we can simply do path.normalize(), which
> returns the normalized path. Or am I overlooking something?

I haven't been following (either discussion) closely, but this sounds similar 
to some posts I read about a discussing involved a .reverse() method, and
the apparent conclusion that .reversed() [note the 'd'] was more appropriate
as it didn't imply that the object was being modified in-place, but that
it was returning a reversed version of itself.  Same thing could apply here...

-Peter


From simonb at NOTTHISBIT.webone.com.au  Mon Jan 19 19:09:20 2004
From: simonb at NOTTHISBIT.webone.com.au (Simon Burton)
Date: Tue, 20 Jan 2004 11:09:20 +1100
Subject: Pyrex and numarray
References: <buh7to$ldk$1@graf.cs.uni-magdeburg.de>
Message-ID: <pan.2004.01.20.00.09.15.463837@NOTTHISBIT.webone.com.au>

On Mon, 19 Jan 2004 19:33:28 +0100, Marco Bubke wrote:

> Hi
> 
> I have tried to include numarray in Pyrex but I get allways this error:
> 
> Traceback (most recent call last):
>   File "gears.py", line 9, in ?
>     import gl
>   File "/home/marco/projects/test_pyrex/gl.pyx", line 40, in gl
>     ctypedef class numarray.NumArray [object PyArrayObject]:
> ValueError: numarray.NumArray does not appear to be the correct type
> object
> 

Yes, i had that problem. Here is what I'm using now:

  ctypedef class numarray._numarray._numarray [object PyArrayObject]:
    # Compatibility with Numeric
    cdef char *data
    cdef int nd
    #cdef int dimensions[MAXDIM], strides[MAXDIM]
    cdef int *dimensions, *strides
    cdef object base
    cdef PyArray_Descr *descr
    cdef int flags
    # New attributes for numarray objects
    cdef object _data         # object must meet buffer API
    cdef object _shadows      # ill-behaved original array.
    cdef int    nstrides      # elements in strides array
    cdef long   byteoffset    # offset into buffer where array data begins
    cdef long   bytestride    # basic seperation of elements in bytes
    cdef long   itemsize      # length of 1 element in bytes
    cdef char   byteorder     # NUM_BIG_ENDIAN, NUM_LITTLE_ENDIAN
    cdef char   _aligned      # test override flag
    cdef char   _contiguous   # test override flag

cdef extern from "numarray/libnumarray.h":
  void import_libnumarray()
  object NA_NewAll(
    int ndim, maybelong* shape, NumarrayType type, void* buffer,
    maybelong byteoffset, maybelong bytestride, int byteorder, int aligned, int writeable )
  object NA_NewAllStrides(
    int ndim, maybelong* shape, maybelong* strides, NumarrayType type, void* buffer,
    int byteorder, int byteoffset, int aligned, int writeable )
  object NA_New( void* buffer, NumarrayType type, int ndim,... )
  object NA_Empty( int ndim, maybelong* shape, NumarrayType type )
  object NA_NewArray( void* buffer, NumarrayType type, int ndim, ... )
  object NA_vNewArray( void* buffer, NumarrayType type, int ndim, maybelong *shape )

  object NA_InputArray (object, NumarrayType, int)
  object NA_OutputArray (object, NumarrayType, int)
  object NA_IoArray (object, NumarrayType, int)
  object PyArray_FromDims(int nd, int *d, int type)
  object NA_updateDataPtr(object)
  object NA_getPythonScalar(object, long)
  object NA_setFromPythonScalar(object, int, object)
  #object NA_getPythonScalar(PyArrayObject, long)
  #object NA_setFromPythonScalar(PyArrayObject, int, PyArrayObject)

  object PyArray_ContiguousFromObject(object op, int type,
                                      int min_dim, int max_dim)
  #cdef void*NA_OFFSETDATA(object)
  void*NA_OFFSETDATA(_numarray)
  int  NA_nameToTypeNo  (char*)


Simon.

-- 
Simon Burton, B.Sc.
Licensed PO Box A66
ANU Canberra 2601
Australia
Ph. 02 6249 6940
http://arrowtheory.com 





From r.s at ZZmindspring.com  Wed Jan 21 23:54:43 2004
From: r.s at ZZmindspring.com (r.e.s.)
Date: Thu, 22 Jan 2004 04:54:43 GMT
Subject: Assignment to slice
References: <20040121191546.4975.qmail@web40102.mail.yahoo.com>
	<mailman.606.1074714639.12720.python-list@python.org>
Message-ID: <nIIPb.22964$zj7.8188@newsread1.news.pas.earthlink.net>

"James Henderson" <james at logicalprogression.net> wrote ...

JH  Assignment to x[-4:-3] is not same as assignment to x[-1:0]:
JH
JH   >>> x = [1, 2, 3]
JH   >>> x[-4:-3] = [56]
JH   >>> x
JH   [56, 1, 2, 3]
JH   >>> x = [1, 2, 3]
JH   >>> x[-1:0] = [56]
JH   >>> x
JH   [1, 2, 56, 3]
JH
JH   Although x[-4:-3] and x[-1:0] both evaluate to the same 
JH   thing (an empty list).  
JH   I would be interested to hear what anyone else has to say 
JH   about this.

Here's my beginner's take on "slice indices" ... 

Since len(x)==3, *only* the values -1, -2, and -3 are shorthand, 
standing for 2, 1, 0 resp.;  i.e., only -1, -2, ..., -len(x) are
shorthand, and any other negative integer is equivalent to 0;
any positive integer values > len(x) are equivalent to len(x).

So, x[-4:-3] stands for x[0:0], while x[-1:0] stands for x[2:0].
Both x[0:0] and x[2:0] are empty lists, but x[0:0] is located 
"just before x[0]" whereas x[2:0] is located ""just before x[2]",
and the assignments amount to insertions at the resp. locations. 

I trust someone will correct me if I'm wrong, but it seems to me 
a simpler restatement of what's in the Python Reference Manual.

--r.e.s.


From davecook at nowhere.net  Sat Jan 24 06:24:44 2004
From: davecook at nowhere.net (David M. Cook)
Date: Sat, 24 Jan 2004 11:24:44 GMT
Subject: Python & Databases ?
References: <4011bcd6$0$4051$afc38c87@news.optusnet.com.au>
Message-ID: <slrnc14lfs.43r.davecook@localhost.localdomain>

In article <4011bcd6$0$4051$afc38c87 at news.optusnet.com.au>, Peter Moscatt
wrote:

> Will Python work with any of the databases like MySQL... ?

Yes, very nicely indeed.  You can use mysqldb or one of the
object-relational mappers that support mysql, like sqlobject or middlekit.

Dave Cook



From candiazoo at comcast.net  Thu Jan 22 20:44:27 2004
From: candiazoo at comcast.net (Zoo Keeper)
Date: Fri, 23 Jan 2004 01:44:27 GMT
Subject: Seem to be having trouble with Python/Bethon.
Message-ID: <PM0003D18B88B36E37@x1-6-00-a0-c9-e7-c3-de.ne1.client2.attbi.com>

>>> class foo(BWindow.BWindow):
..     pass
..
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
TypeError: base is not a class object

Not entirely sure what the message means (beyond the obvious that it
does not believe the class is a class, so to speak).  (Btw, I did
previously import BWindow).

Anyone here have BeOS experience with Python?  The "rest" of python
works fine.  I've built and added packages to it and am in the process
of coding an application which I will, eventually, want a front end for.

Thanks!

Mike


From jsbenson at bensonsystems.com  Thu Jan 15 14:15:47 2004
From: jsbenson at bensonsystems.com (John Benson)
Date: Thu, 15 Jan 2004 11:15:47 -0800
Subject: I come not to bury C++, but to praise it...
Message-ID: <0bf601c3db9b$fb7ccda0$8d09500a@jsbwxp3>

I give up! Enough already! Maybe C++ will make my teeth brighter and my
socks whiter, and remove the yellowish wax buildup on the kitchen floor! :^)

I read Koenig's C Traps and Pitfalls years ago; it's been one of my favorite
programming language books for a long time, so I'm predisposed to set a
certain store by the following pronouncement:

Message: 6
Date: 15 Jan 2004 02:37:32 +0000
From: jjl at pobox.com (John J. Lee)
Subject: Re: I come not to bury C++, but to praise it...
To: python-list at python.org
Message-ID: <87wu7uq6mr.fsf at pobox.com>
Content-Type: text/plain; charset=us-ascii

"Andrew Koenig" <ark at acm.org> writes:

> "John Benson" <jsbenson at bensonsystems.com> wrote in message
> news:mailman.337.1074032524.12720.python-list at python.org...
>
> > I got into Python because I took one look at C++ and saw all the
> > handwaving in the introductory O'Reilly book to the effect that
> > "everything looks sweet now, but wait until these snazzy little
> > features interact..." and then started casting around for another
> > road to OOP.
>
> Perhaps you should cast around for a different C++ book while you're
> at it, too -- maybe the one you found isn't well suited to your
> particular learning style.

Andrew's own "Accelerated C++" is good (written with Barbara Moo). :-)


John

(end quote)

It took years to get IT managers to feel comfortable with software
development in C as opposed to COBOL. I suppose I may still be haunted by
that; it just seems that advocating C++ raises the bar even more for the
maintenance programmers that get stuck with my code. Python is a whole
different story, since the rapidity with which I can field a serviceable
prototype changes the economics completely. But again, this may be more an
artefact of my personal experience than a Universal Truth.








From manoj at cs.uoregon.edu  Fri Jan 30 12:55:38 2004
From: manoj at cs.uoregon.edu (Manoj K Pandey)
Date: Fri, 30 Jan 2004 09:55:38 -0800 (PST)
Subject: Source specific multicast implementation..
Message-ID: <Pine.SOL.4.58.0401300954080.16329@ix.cs.uoregon.edu>

hi All,

Do we have Source Sepcific Multicast, SSM
implemented in python...
Does anyone have any API for it, which they would
like to share?

thnx in advance,
manoj

******************************
Manoj Pandey, PhD student,
#207C, Network Research Lab,
Deschutes, Computer and Information Science,
University of Oregon, Phone# 541-346-0892 [Office],
www.cs.uoregon.edu/~manoj
******************************



From hans at zephyrfalcon.org  Sun Jan 25 19:06:31 2004
From: hans at zephyrfalcon.org (Hans Nowak)
Date: Sun, 25 Jan 2004 19:06:31 -0500
Subject: xrange not hashable - why not?
In-Reply-To: <20040125144724.GA13741@nl.linux.org>
References: <20040125144724.GA13741@nl.linux.org>
Message-ID: <40145A07.2070906@zephyrfalcon.org>

Gerrit Holl wrote:
> Hi,
> 
> why is an xrange object not hashable?
> I was trying to do something like:
> 
> comments = {
>     xrange(0, 4): "Few",
>     xrange(4, 10): "Several",
>     xrange(10, 100): "A lot",
>     xrange(100, sys.maxint): "Can't count them"}
> for (k, v) in comments.items():
>     if n in k:
>         commentaar = v
>         break

So far, everybody who replied seems to agree or assumes that xrange indeed 
isn't hashable.  However:

Python 2.3.3 (#51, Dec 18 2003, 20:22:39) [MSC v.1200 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
 >>> import sys
 >>> comments = {
...     xrange(0, 4): "Few",
...     xrange(4, 10): "Several",
...     xrange(10, 100): "A lot",
...     xrange(100, sys.maxint): "Can't count them"}
 >>> comments
{xrange(4): 'Few', xrange(4, 10): 'Several', xrange(100, 2147483647): "Can't 
count them", xrange(10, 100): 'A lot'}

Sure enough, that dict works.  Let's try something else then:

 >>> a = xrange(10)
 >>> b = xrange(20)
 >>> hash(a), hash(b)
(7774576, 7775104)

It seems that xrange objects do have a hash value.  The other part of the code 
works as well:

 >>> n = 3
 >>> for k, v in comments.items():
...     if n in k:
...         commentaar = v
...         break
...
 >>> commentaar
'Few'

I don't really see what the problem is...?

-- 
Hans (hans at zephyrfalcon.org)
http://zephyrfalcon.org/





From hokiegal99 at hotmail.com  Mon Jan  5 16:17:58 2004
From: hokiegal99 at hotmail.com (hokieghal99)
Date: Mon, 05 Jan 2004 16:17:58 -0500
Subject: local interpreter remote machines
Message-ID: <btcka7$phd$1@solaris.cc.vt.edu>

This may not be possible, but I thought I'd ask anyway. Could I get the 
below code to run on a Python server where other machines would connect 
to it (say thru the Web) and get details of *their* system instead of 
the system details of the machine that the interpreter is running on? 
Any ideas?

Thanks!!!

import os
import socket

x = os.uname()
y = socket.gethostbyaddr(x[1])
print
print "This is the connecting machine's os:", x[0]
print "This is the connecting machine's os version:", x[2]
print "This is the connecting machine's IP address:", y[2]
print



From idbaxter at semdesigns.com  Sat Jan 10 14:10:30 2004
From: idbaxter at semdesigns.com (Ira Baxter)
Date: Sat, 10 Jan 2004 13:10:30 -0600
Subject: scanning c-code
References: <btj4oo$g58$1@piggy.rz.tu-ilmenau.de>
Message-ID: <40004ca7$7@giga.realtime.net>

"tm" <js.bach at web.de> wrote in message
news:btj4oo$g58$1 at piggy.rz.tu-ilmenau.de...
> I have to to scan c-code, look for a c-struct variable(declaration) and
> represent the struct in a tree-graphic.
> Are there modules for scanning c-code and graphictools for the
> representation stuff.
> What would you advise as a starting point...

I wouldn't specifically recommend python for this.
This is really a job for a parsing engine.
(To the extent that python has good parsing
tools and good C definitions, it might be an OK answer.)
Getting parsing tools in python is likely possible.
Getting a good C definition, however, is harder.

You might consider an engine designed to parse
languages that has a good C definition.
GNU C is one example.
Another is
   http://www.semanticdesigns.com/Products/FrontEnds/CFrontEnd.html


-- 
Ira D. Baxter, Ph.D., CTO   512-250-1018
Semantic Designs, Inc.      www.semdesigns.com




----== Posted via Newsfeed.Com - Unlimited-Uncensored-Secure Usenet News==----
http://www.newsfeed.com The #1 Newsgroup Service in the World! >100,000 Newsgroups
---= 19 East/West-Coast Specialized Servers - Total Privacy via Encryption =---


From skip at pobox.com  Mon Jan 26 15:15:00 2004
From: skip at pobox.com (Skip Montanaro)
Date: Mon, 26 Jan 2004 14:15:00 -0600
Subject: Guardian: open source is a throwback says Jack Schofield
In-Reply-To: <40156FB6.F71C19B0@engcorp.com>
References: <64cff82f.0401251143.328388bd@posting.google.com>
	<mailman.772.1075066543.12720.python-list@python.org>
	<bv1jkf$g46$1@namru.matavnet.hu>
	<bv1pgj$ctl$3@news.service.uci.edu> <40156FB6.F71C19B0@engcorp.com>
Message-ID: <16405.30020.406117.575663@montanaro.dyndns.org>

    Josiah> http://www.whitehouse.gov/news/releases/2004/01/20040122-5.html

    Peter> I'm sorry, really, to bring this up, but as a Canadian I might be
    Peter> a little thick on this point, so help me out: was that site
    Peter> hacked?  Or is this for real?

I'm a natural-born American and I wondered the same thing.

This is what you get when the electorate chooses the "leader of the free
world" because "he seems like such a nice fellow" or "he's a regular guy"
Pardon me, but I don't want "a regular guy" in this particular position.  I
want the god damned smartest, most capable person we can find.

Hmmm...  If we're electing the "leader of the free world", maybe the entire
free world ought to be able to vote.  Imagine the primary season running up
to that election!

Skip



From aathan-python-5923 at cloakmail.com  Mon Jan  5 21:35:26 2004
From: aathan-python-5923 at cloakmail.com (Andrew Athan)
Date: Mon, 5 Jan 2004 21:35:26 -0500
Subject: Repost: Can't sys.exit() from SIGTERM handler?
In-Reply-To: <20040106013708.GD5514@unpythonic.net>
Message-ID: <NFBBICMEBHKIKEFBPLMCIEIEGPAA.aathan-python-5923@cloakmail.com>


Yes, but it gets stranger (see below).  It seems if I try to catch
exceptions from within the SIGTERM handler, they are instead caught by the
main program.

Perhaps this is because a second signal is raised from within the SIGTERM
handler and python doesn't handle nested signals well?

---------------------------------------------------------
So #1:

But first, the "simple" question:  It seems really onerous to have to
explicitly trap SystemExit and re-raise everywhere in my program, just so I
can make sure that proper exit handlers (atexit(), etc.) are called.  What
is the idiom to "force" and exit while still "properly" shutting down the
interpreter?

----------------------------------------------------------
#2
Now the hard question...

It seems my problem is caused by my atexit() handler.  It is meant to kill
the children, and then os.waitpid() for them to make sure they are dead.  I
added this because killing the python process was not reliably killing the
children (this surprised me since I thought the shell sent the signal to all
processes in a process group??!!!  perhaps cdparanoia has some incorrect
exception handling which causes it not to reliably die on SIGTERM)

I attribute my woes to the atexit() handler because when I changed my code
to explicitly call the function I register with atexit() (called
killChildren()) from within my SIGTERM handler, then the behavior got even
weirder.

The code I have basically looks something like this (pseudocode)

childrenList=[]
def sigterm(a,b):
  killChildren()
  childrenList=[]
  sys.exit()

def sigchild(a,b):
  pass

def killChildren():
  try:
    os.kill(pid,signal.SIGTERM)
    os.waitpid(pid,0)
  pass:
    pass

signal.signal(sigchild,signal.SIGCHILD)
signal.signal(sigterm,signal.SIGTERM)
childrenList.append(fork(...))
sys.atexit(killChildren)
...
while 1:
  try:
    foo=read()
  except Exception,e:
    print 'Here: %s'%e
    pass

If I send a SIGTERM, then I occasionally get 'Here: [Errno 10] No child
processes' printed out!!!

Stranger still, if I leave the normal atexit() handler alone by doing this
instead:

def sigterm(a,b):
  sys.exit()

then *no* exception is printed out and the program keeps running.  I *still*
don't get anything printed even if I explicitly catch SystemExit within the
while 1: loop and print a debug statement.

The only conclusion I can draw is that (a) atexit's exception handling is
strange and/or (b) if the child is still running when I os.kill() it in in
the atexit() handler that occurs after the sys.exit() in, the SIGCHILD that
gets raised as a result of the kill() is interfering in some very strange
way.

HELP! Any comments?

Thanks,
A.

-----Original Message-----
From: Jeff Epler [mailto:jepler at unpythonic.net]
Sent: Monday, January 05, 2004 8:37 PM
To: Andrew Athan
Cc: python-list at python.org
Subject: Re: Repost: Can't sys.exit() from SIGTERM handler?


If I had to guess, I'd bet you had a blanket exception handler
somewhere.  sys.exit merely raises SystemExit, and if this exception
propogates all the way back up, Python treats it specially by exiting
instead of printing the exception's traceback.

:r term.py
import os, signal, time, sys, traceback

def sigterm(a, b):
	print "sigterm"
	sys.exit()

signal.signal(signal.SIGTERM, sigterm)

os.system("(sleep 1; kill %s) &" % os.getpid())

print "Sleeping (should be killed)"

try:
	time.sleep(2)
except SystemExit:
	traceback.print_exc()
	raise

print "sleep finished (!?)"

:r!python -u term.py

Sleeping (should be killed)
sigterm
Traceback (most recent call last):
  File "term.py", line 14, in ?
    time.sleep(2)
  File "term.py", line 5, in sigterm
    sys.exit()
SystemExit




From gherron at islandtraining.com  Mon Jan  5 12:26:14 2004
From: gherron at islandtraining.com (Gary Herron)
Date: Mon, 5 Jan 2004 09:26:14 -0800
Subject: Get UID of username
In-Reply-To: <btc65f$i3l$01$1@news.t-online.com>
References: <btc65f$i3l$01$1@news.t-online.com>
Message-ID: <200401050926.14167.gherron@islandtraining.com>

On Monday 05 January 2004 09:20 am, Florian Lindner wrote:
> Hello,
> how can I find out the UID of a username on a linux system?
> Thx,
> Florian

Try the pwd module:

>>> import pwd
>>> pwd.getpwnam('gjh')
('gjh', 'x', 500, 500, 'Gary Herron', '/home/gjh', '/bin/bash')


Gary Herron





From webmaster at beyond-thoughts.com  Fri Jan  9 12:06:03 2004
From: webmaster at beyond-thoughts.com (Christoph Becker-Freyseng)
Date: Fri, 09 Jan 2004 18:06:03 +0100
Subject: PRE-PEP: new Path class; mutability, __hash__, __eq__, __cmp__
In-Reply-To: <6qad4xmjsd.fsf@salmakis.intevation.de>
References: <vvivefh35qjv9a@news.supernews.com>
	<3FFA7E82.4020609@beyond-thoughts.com>
	<mailman.159.1073418070.12720.python-list@python.org>
	<3FFC9209.7060703@beyond-thoughts.com>
	<mailman.185.1073563995.12720.python-list@python.org>
	<mailman.199.1073604223.12720.python-list@python.org>
	<6qad4xmjsd.fsf@salmakis.intevation.de>
Message-ID: <3FFEDF7B.6050501@beyond-thoughts.com>

Bernhard Herzog wrote:
> Christoph Becker-Freyseng <webmaster at beyond-thoughts.com> writes:
> 
> 
>>So for __eq__ it follows naturaly
>>def __eq__(self, other):
>>	FIXME: isinstance checking
>>	return (str(self.normalized()) == str(other.normalized()))
>>It cares about nonexistent paths, too. (The samefile-solution won't --- 
>>we might code a special case for it ...)
> 
> 
> What exactly does normalized() do?  If it's equivalent to
> os.path.normpath, then p1 == p2 might be true even though they refer to
IMO yes.
> different files (on posix, a/../b is not necessarily the same file as
> b).  OTOH, if it also called os.path.realpath too to take symlinks into
> account, __eq__ would depend on the state of the filesystem which is
> also bad.
> 
> IMO __eq__ should simply compare the strings without any modification.
> If you want to compare normalized paths you should have to normalize
> them explicitly.
I agree with that. While it would be nice if __eq__ could match such 
things it is ambiguous.
So better let __eq__ be a bit strict than faulty.



Christoph Becker-Freyseng




From dave at pythonapocrypha.com  Fri Jan  9 17:47:41 2004
From: dave at pythonapocrypha.com (Dave Brueck)
Date: Fri, 9 Jan 2004 15:47:41 -0700
Subject: Straw poll on Python performance (was Re: Python is far from a
	top performer ...)
References: <ryELb.238$tK2.228@amstwist00><3fff234a$0$129$e4fe514c@dreader3.news.xs4all.nl>
	<3FFF26A1.943DEA84@engcorp.com>
Message-ID: <026e01c3d702$970ec5a0$6401fea9@YODA>

Peter wrote:
> Iwan van der Kleyn wrote:
> >
> > In other words: it would be nice if Python on average would run faster
> > so the need for optimisation would lessen.
>
> I disagree with the above.  My opinion has long been that Python runs
> adequately fast and that few people should need to spend much time on
> optimization.  Maybe that sort of view should be put to the test.
>
> This is my "straw poll" question:
>
>   Do you spend a "significant" amount of time actually optimizing your
>   Python applications?  (Significant is here defined as "more than five
>   percent of your time", which is for example two hours a week in a
>   40-hour work week.)

Yay, straw poll! ;-)

I program in Python full-time and each spend approximately zero hours
optimizing. In the past two years I can think of two instances in which I went
into heavy optimization mode: one was for a web server that needed to handle
hundreds of requests per second and the other was a log processor that needed
to parse and process several gigabytes of log data per hour.

In the server I added a tiny C extension to make use of the Linux sendfile API,
all the other optimizations were algorithmic. In the log processor all the
optimizations ended up being either algorithmic or doing fewer dumb things
(like recomputing cacheable data).






From peter at engcorp.com  Wed Jan 21 09:23:36 2004
From: peter at engcorp.com (Peter Hansen)
Date: Wed, 21 Jan 2004 09:23:36 -0500
Subject: Tutorial/Docs on threading with Python?
References: <buls14$q7u$1@f1node01.rhrz.uni-bonn.de>
Message-ID: <400E8B68.1D509128@engcorp.com>

Andreas Neudecker wrote:
> 
> I would like to learn how to do threading with Python. I have not done
> threading before can anyone suggest URLs where I could find
> understandable information on that? (I am using Python for approx. 1
> year now, previous programming experiences lie back a long time).

http://www.google.com/search?q=python+threading+tutorial

Check out the fifth link, Aahz's page.

-Peter


From dallasm at aiinet.com  Fri Jan 23 18:10:47 2004
From: dallasm at aiinet.com (Mahrt, Dallas)
Date: Fri, 23 Jan 2004 18:10:47 -0500
Subject: help with unittest
Message-ID: <AD59566A9D83864F871AE2E5250306400113480F@aimail.aiinet.priv>


> if __name__ == '__main__':
>  #unittest.main()
>  suite =
> unittest.defaultTestLoader.loadTestsFromNames(['myTestCase2.te
> stTrue'])
>  unittest.TextTestRunner().run(suite)
> 
Not quite an asnswer to the question, but why not do it this way

If __name__ = '__main__':
	suite = unittest.makeSuite(myTestCase2, 'testTrue')
	unittest.TextTestRunner().run(suite)

?

---
Dallas S. Mahrt



From me at privacy.net  Mon Jan 26 12:40:49 2004
From: me at privacy.net (Duncan Booth)
Date: 26 Jan 2004 17:40:49 GMT
Subject: Single and double asterisks preceding variables in function
	arguments
References: <bv3d4e$1h7$1@newshost.mot.com>
	<bv3gdg$ms0sn$1@ID-217427.news.uni-berlin.de>
Message-ID: <Xns947CB3CD0C34Eduncanrcpcouk@127.0.0.1>

anton muhin <antonmuhin at rambler.ru> wrote in news:bv3gdg$ms0sn$1 at ID-
217427.news.uni-berlin.de:

> Stephen Boulet wrote:
>> I've run across code like "myfunction(x, *someargs, **someotherargs)", 
>> but haven't seen documentation for this.
>> 
>> Can someone fill me in on what the leading * and ** do? Thanks.
>> 
>> Stephen
> 
> See item 7.5 in Language Reference. In short: * declaries list of 
> additional parameters, while ** declares map of additional parameters. 
> Try somehting like:
> 
>      def foo(*params): print params
> 
> and
> 
>      def bar(**params): print params
> 
> to find out details.

I may be wrong, but I think the OP was asking about calling functions 
rather than defining them. The '*' and '**' before arguments in function 
calls are described in section 5.3.4 of the language reference but, so far 
as I know, isn't explained clearly in any of the more 'user level' text. 
There is a brief mention in the library reference under the documention of 
'apply'.

In a call of the form:

   myfunction(x, *someargs, **someotherargs)

the sequence 'someargs' is used to supply a variable number of additional 
positional arguments. 'someotherargs' should be a dictionary and is used to 
supply additional keyword arguments.



From astrand at lysator.liu.se  Tue Jan  6 16:44:04 2004
From: astrand at lysator.liu.se (Peter Astrand)
Date: Tue, 6 Jan 2004 22:44:04 +0100 (CET)
Subject: PEP 324: popen5 - New POSIX process module
In-Reply-To: <16E1010E4581B049ABC51D4975CEDB8803060D8E@UKDCX001.uk.int.atosorigin.com>
Message-ID: <Pine.LNX.4.44.0401062234130.8513-100000@aristocat.lysator.liu.se>

On Tue, 6 Jan 2004, Moore, Paul wrote:

> > 1) Should popen5 support a string argument on Windows?
> >
> > and
> >
> > 2) Should popen5 support a string argument on UNIX?
> 
> 
> > You seems to have made up your mind about case 1, and even thinks that 
> > this should be "recommended". I'm not that sure. 
> 
> Using a list works most of the time, but can break in subtle, and surprising
> ways. I have coded "Algorithm A in reverse" a number of times, and *always*
> managed to construct a program that "broke". With Windows GUI programs
> (not the key use case for this module, I admit) it's not remotely hard to
> construct a broken example :-(

Ok, lets support case 1 then. Currently, I also think that we should
support case 2 as well, using Algorithm A. We need to document that single
quote escaping are not supported, though.


> > The only drawback with "process" is that it is already in use by 
> > http://starship.python.net/~tmick/#process. 
> 
> Ah. I wasn't aware of that module. 

I wasn't either, until I was about to announce the PEP. That's why there's 
no reference to Trent's module in the PEP (yet). 


>I wonder whether Trent would be willing
> to combine his code and yours somehow, and donate the name?

I have contacted Trent; let's give hime some time to respond. 
 

-- 
/Peter ?strand <astrand at lysator.liu.se>




From francisgavila at yahoo.com  Sun Jan 11 14:20:59 2004
From: francisgavila at yahoo.com (Francis Avila)
Date: Sun, 11 Jan 2004 14:20:59 -0500
Subject: Variable Scope 2 -- Thanks for 1.
References: <dcde6f.0401091247.c17b76e@posting.google.com>
	<dcde6f.0401111045.7fc24246@posting.google.com>
	<10038cpbu23hv93@corp.supernews.com>
Message-ID: <10038irlidciha2@corp.supernews.com>

Francis Avila wrote in message <10038cpbu23hv93 at corp.supernews.com>...
>Jens Thiede wrote in message ...
>>OK, thanks for sorting that out, but what do I replace in the
>>following to avoid referancing:
>>
>>x = [[0]*5]*5
>>x is [[0,0,0,0,0], [0,0,0,0,0], [0,0,0,0,0], [0,0,0,0,0], [0,0,0,0,0]]
>>
>>and after
>>
>>x[0][0] = 1;
>>x is [[1,0,0,0,0], [1,0,0,0,0], [1,0,0,0,0], [1,0,0,0,0], [1,0,0,0,0]]
>
>Ah, the joy of list comprehensions!
>
>>>> x = [ [ 0 for i in range(5)] for j in range(5)]

In my enthusiasm for list comprehensions I went too far.  The inner loop
comp is unnecessary because ints are immutable.  So  [ [0]*5 for i in
range(5) ] is enough.

--
Francis Avila



From jjl at pobox.com  Mon Jan 19 20:43:44 2004
From: jjl at pobox.com (John J. Lee)
Date: 20 Jan 2004 01:43:44 +0000
Subject: New to Python: my impression v. Perl/Ruby
References: <mailman.493.1074484056.12720.python-list@python.org>
	<87ad4kxees.fsf@pobox.com>
	<mailman.524.1074550958.12720.python-list@python.org>
Message-ID: <87r7xv9yy7.fsf@pobox.com>

Just want to state explicitly from the outset that this is all
intended as friendly argument.  Personally, I take it as a compliment
when somebody takes me seriously enough to argue with me ;-)

Wayne Folta <wfolta at netmail.to> writes:

> I think one problem here is that somehow I left a paragraph out of my
> original posting. After years and years of Perl use, I evaluated Ruby
> and Python and have adopted Python. Ruby intrigues me, but it's not
> what I will use to get things done. I thought that as a newcomer to
> both, I though I might have a different perspective from people who
> were native users, hence my posting.

Great.

I don't think that makes any difference to what I said, though: the
correctness or otherwise of your statements is not dependent on which
language you happen to like best.


> I can see that without that info, it may have appeared that I was
> possibly advocating Ruby over Python, which would be inappropriate in
> a Pyton forum. I apologize for the confusion!

Absolutely not!  I see nothing even faintly wrong with arguing in
favour of Ruby in comp.lang.python.  Go ahead!  In return, I'll tell
you off if I think what you say is wrong or poorly reasoned :-)


> > Well, that's not exactly a huge leap given any knowledge of how the
> > internet works.  I'm not sure that Python's docs should be in the
> > business of educating people about that...
> 
> There's no necessary connection between the protocol stack and
> software packages. It's good and sensible that POP3 is built on
> socket, but it could be based on my_sockets or _socket or who knows
> what. I'm not asking that the entire protocol stack be documented, and
> it's not as if "obvious" things aren't documented in detail elsewhere
> in Python. (For example, there's an entire paragraph on socket's
> gethostname(). I could rhetorically say this is so obvious it should
> be replace with "returns host name" or "see GETHOSTNAME(3)"?)

I see your point, though I think there's an significant difference in
degree here.  Still, perhaps it's useful (while timeouts aren't
directly supported by clients of the socket module) to point people to
the socket module docs for the default timeout setting.  Try writing a
doc patch and submitting it to SF.

[...]
> > ...but the fact that there is no timeout support in client modules of
> > the socket module is a known bug:
> 
> This is a bug? I guess it can cause problems in the underlying
> package,

Sorry, I was following the sloppy practise of using the word "bug" to
cover all sins.  By "bug" here I mean "gross missing feature" --
something that really should be there, but nobody has got round to
implementing yet.  I didn't mean that socket or its client modules
behave incorrectly according to their docs (apart from raising
socket.timeout, of course!).


> but I sure hope that the exception is handled and then
> re-raised as timeout_proto or something distinct from error_proto. I

ATM, client modules know nothing about socket timeouts, AFAIK, so
socket.timeout is never caught.  Not sure whether it's best to just
let socket.timeout propagate, or wrap it in an error_proto (if the
latter, a subclass certainly sounds like a good idea).

[...]
>  From an external viewpoint I don't see that much difference between
> "fixing" this bug and simply documenting the other exceptions you
> might see from underlying packages.

set_timeout() methods (or similar) need to be added to these modules.

[...about "Real OO"...]
> languages like Python) and said that. I'm making no statement about
> reality, but simply about what advocates mantras are. (Or actually, as
> I carefully said, "might be".)
> 
> (Actually, now that I reread it, I should've said "pure OO", which I
> believe is more reflective of their statements. And this has some
> basis in fact, I believe, if you look at the v1 of Ruby and Python and
> what is first-class and what is not.)

I don't know what "pure OO" is either!


> > I don't see how a missing feature in Python reveals any difference in
> > culture between Python and Ruby, other than perhaps that the Ruby
> > people like implementation inheritance more than the people who
> > designed the Python standard library.
> 
> You have taken my observation and transformed it into ignorance on my
> part

In saying "...I'm not sure that Python's docs should be in the
business of educating people about that..." I wasn't trying to imply
that you're uneducated!  I assumed you simply failed to make the
"obvious" (or not) connection from timeouts to the socket module, and
made the point that the documentation cannot and should not attempt to
solve all such problems.


> and a supposed bug on Python's part. Once you've done that, yes,
> it is no longer illuminative.

My point was simply that there are no .set_timeout() methods in the
client modules of socket because nobody has yet got round to it, not
because of some deliberate design decision...


> Again, as you yourself say, they chose to subclass protocol services
> off of a class 'protocol' and Python did not. In fact, Python chose to
> not subclass POP3 from anything. Why? Because of the culture, in my
> opinion. Ruby emphasizes OO and that it's "pure OO" (their opinion)
> and so an implementation that involves a Smalltalk-ish subclassing of
> everything recommends itself.

...oh, I see.  Yes, that's a substantive difference in design, I agree
(and perhaps in culture -- I wouldn't know, not having used Ruby).

(Mind you, it's far from obvious that it's good OO design to have
every class that uses sockets inherit from a socket class, let alone
that it's a requirement for "pure OO" (which remains undefined).  Does
"pure OO" mean simply "using inheritance a lot"?  Hmm, I didn't mean
to get into this debate: I just wanted to point out the lack of
meaning in saying "Real OO" without defining what you mean.)


> Python has a different culture where such strict tree-like class
> structure does not recommend itself. Python's "batteries included"
> philosophy resulted in a more straightforward and (mostly) better
> documented way to do it.
> 
> Intellectually, I prefer Ruby. Ruby and Smalltalk intrigue me. But the
> "pure OO" approach (my words this time) is annoying, and even at some
> point inconsistent, as I mentioned in my paragraph about 0.step(). I
> feel like Python has got the right balance where it's OO and pretty
> much fully so, but not fanatically so. And it's what I've adopted.
[...]

I'm not competent enough to make judgements on these issues, I think:
they're quite subtle.  I certainly agree that such decisions about
language and library design should be made on the basis of pragmatic
design informed by a good understanding of underlying principles, not
on some blinkered notion of "purity", but I've not much idea where
Ruby fits on that scale, so I'll shut up :-)


John


From a at a.invalid  Thu Jan  8 18:00:47 2004
From: a at a.invalid (Timo Virkkala)
Date: Fri, 09 Jan 2004 01:00:47 +0200
Subject: Cheetah - Test suite failures
In-Reply-To: <f8kLb.5017838$Id.803326@news.easynews.com>
References: <btk7rt$7tq$1@nyytiset.pp.htv.fi>
	<f8kLb.5017838$Id.803326@news.easynews.com>
Message-ID: <btknev$6e6$1@nyytiset.pp.htv.fi>

Joe Francia wrote:
> You also may want to post this question to the Cheetah list:
> http://lists.sourceforge.net/lists/listinfo/cheetahtemplate-discuss

Thanks, I'll do that..

--
Timo Virkkala


From mcfletch at rogers.com  Wed Jan 21 16:48:27 2004
From: mcfletch at rogers.com (Mike C. Fletcher)
Date: Wed, 21 Jan 2004 16:48:27 -0500
Subject: Nokia prefers Python
In-Reply-To: <mKTIlIA10uDAFwGM@jessikat.fsnet.co.uk>
References: <mKTIlIA10uDAFwGM@jessikat.fsnet.co.uk>
Message-ID: <400EF3AB.9050601@rogers.com>

Robin Becker wrote:

>This might be the start of a success story. Says Nokia prefers Python!
>
>http://www.theregister.co.uk/content/64/35040.html
>-ringing-ly yrs- 
>Robin Becker
>  
>
Oh, neat.  Someone was looking for a series 60 developer a few months 
ago and wandered into the PyGTA meeting (well, wandered with some 
prodding :) ).  Maybe she knew something we didn't. 

Wonder what the process is for getting access to the dev kit?  I suppose 
I'd have to buy a phone/N-gage first :) .  Python on a cell-phone... 
what a wonderful world :) ,
Mike

_______________________________________
  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://members.rogers.com/mcfletch/






From martin at v.loewis.de  Sat Jan  3 19:14:52 2004
From: martin at v.loewis.de (Martin v. Loewis)
Date: Sun, 04 Jan 2004 01:14:52 +0100
Subject: [Python-Dev] PEP 324: popen5 - New POSIX process module
In-Reply-To: <Pine.LNX.4.44.0401032302210.778-100000@aristocat.lysator.liu.se>
References: <Pine.LNX.4.44.0401032302210.778-100000@aristocat.lysator.liu.se>
Message-ID: <3FF75AFC.3020204@v.loewis.de>

Peter Astrand wrote:
> I don't agree. I have used all of the existing mechanism in lots of apps,
> and it's just a pain. There are lots of functions to choose between, but
> none does what you really want. 

So enhance them, instead of replacing them.

>>>    - Cross-process exceptions: Exceptions happening in the child
>>>      before the new process has started to execute are re-raised in
>>>      the parent.
 >>>
>>This is a bug in popen2, IMO. Fixing it is a good thing, but does not
>>require a new module.
> 
> "Fixing popen2" would mean a break old applications; exceptions will 
> happen, which apps are not prepared of. 

I find that an acceptable incompatibility, and it will likely break
no existing application. Applications usually expect that the program
they start actually exists; it is a good thing that they now can
detect the error that the missing/non-executable application.

Errors should never pass silently.

>>>    - A hook for executing custom code between fork and exec.  This
>>>      can be used for, for example, changing uid.
>>
>>Such a hook could be merged as a keyword argument into the existing
>>API.
> 
> 
> Into which module/method/function? 

For example, popen2.popen2, as argument preexec_fn.


> There is no one flexible enough. The 
> case for redirecting only stderr is just one example; this is simple not 
> possible with the current API. 

Can you elaborate? What is the specific problem, how does your preexec
function look like, and how is it used with popen5. I can then show you
how it could be used with popen2, if that was enhanced appropriately.

>>>    - All combinations of file descriptor redirection is possible.
>>>      For example, the "python-dialog" [2] needs to spawn a process
>>>      and redirect stderr, but not stdout.  This is not possible with
>>>      current functions, without using temporary files.
>>
>>Sounds like a new function on the popen2 module.
> 
> 
> To support all combinations, 12 different functions are necessary. Who 
> will remember what popen2.popen11() means? 

Why is that? Just add a single function, with arguments
stdin/stdout/stderr. No need for 12 functions. Then explain the existing
functions in terms of your new function (if possible).

>>>    - Support for connecting several subprocesses (shell "pipe").
>>
>>Isn't this available already, as the shell supports pipe creation,
>>anyway?
> 
> 
> With popen5, you can do it *without* using the shell. 

Why is that a good thing?

> There's already a bug about this; bug 788035. This is what one of the 
> comment says:
> 
> "But this whole popen{,2,3,4} section of posixmodule.c is so fiendishly
> complicated with all the platform special cases that I'm loath to touch
> it..."
> 
> I haven't checked if this is really true, though. 

You really should work with the existing code base. Ignoring it is a
guarantee that your PEP will be rejected. (Studying it, and then
providing educated comments about it, might get you through)

I think this is the core problem of your approach: You throw away all
past history, and imply that you can do better than all prior
contributors could. Honestly, this is doubtful. The current code
is so complicated because implementing pipes is complicated.

> Well, I don't see how this could be done easily: The current API is not 
> flexible enough, and some things (like cross-process exceptions) breaks 
> compatibility. 

I never said it would be easy. However, introducing a new popen module
is a major change, and there must be strong indications that the current
API cannot be enhanced before throwing it away.

There should be one-- and preferably only one --obvious way to do it.

As for breaking compatibility: This is what the PEP should study in
detail. It is sometimes acceptable to break compatibility, if
applications are likely to be improved by the change. *Any* change
can, in principle, break compatibility. Suppose I had an application
that did

from popen5 import open

This application might break if your proposed change is implemented,
as a new module is added. So you can't claim "I will break no programs".

> Writing a good popen module is hard. Providing cross-platform support (for 
> Windows, for example) is even harder. Trying to retrofit a good popen 
> implementation into an old API without breaking compatibility seems 
> impossible to me. I'm not prepared to try. 

So I continue to be -1 with your PEP.

Regards,
Martin





From syver at inout.no  Fri Jan 16 11:39:32 2004
From: syver at inout.no (Syver Enstad)
Date: 16 Jan 2004 17:39:32 +0100
Subject: Very strange unicode behaviour
References: <uisjbrhre.fsf@inout.no>
Message-ID: <uektzrgor.fsf@inout.no>


I have seem to isolate the behaviour:

>>> chr(127).find(u'')
0
>>>
>>> chr(128).find(u'')
-1
>>>
UnicodeError: ASCII decoding error: ordinal not in range(128)
>>>

Observe that the exception is first thrown on after execing a blank
line, after calling find on a non ASCII string.

I'll test this on 2.3 when I get home from work.



From __peter__ at web.de  Fri Jan  2 11:57:16 2004
From: __peter__ at web.de (Peter Otten)
Date: Fri, 02 Jan 2004 17:57:16 +0100
Subject: Passing to a function -- object and method names (or references)
References: <3ff595e2.67831682@news.iprimus.ca>
Message-ID: <bt4825$235$05$1@news.t-online.com>

Midas wrote:

> I'm including code, for cut/paste, to better explain my question. I create
> a Car object then I call some of its methods. No problem. Then I try to
> pass, to a function, the name of the Car object and the name of one of its
> methods. I found one way to get this to work but can someone show me a
> more orthodox way? Is there a way using references to the object and
> somehow the method?

You can access attributes with the getattr() builtin.

carGas = getattr(car, "gas")

You can refer to a method either directly 

fun = car.drive 
fun(123)

or via getattr():

fun = getattr(car, "drive")
fun(321)

I've modified your example to demonstrate this. 

class NoGas(Exception): pass

class Car:
    def __init__(self):
        self.milespergallon = 25.0
        self.gas = 20
        self.travelled = 0
    def drive(self, miles):
        newGas = self.gas - miles/self.milespergallon
        if newGas < 0:
            self.travelled += self.milespergallon*self.gas
            self.gas = 0
            raise NoGas("%s miles travelled. No more gas" %
                self.travelled)
        self.travelled += miles
        self.gas = newGas


def printAttr(obj, attrname):
    "Demo for accessing an attribute by its name"
    print attrname, "=", getattr(obj, attrname)

def callMethod(obj, methodname, *args):
    """ Demo for calling a method determined by its name.
        An arbitrary number of arguments is just passed
        through to the method.
    """
    method = getattr(obj, methodname)
    print "calling", methodname
    method(*args)

def callMethod2(method, *args):
    """ Demo for calling a method reference.
        The method is is generated by obj.method in the
        calling code. Of course you can pass function
        references as well
    """
    method(*args)

def someFunction():
    print "Welcome to the Python Motorshow"

callMethod2(someFunction)
car = Car()
printAttr(car, "gas")
callMethod(car, "drive", 10)
printAttr(car, "gas")
while True:
    printAttr(car, "travelled")
    callMethod2(car.drive, 100)

Note that my car will not travel as far as yours as it is less satisfied
with negative amounts of gas :-)

Peter


From newsgroups at jhrothjr.com  Wed Jan 21 16:34:26 2004
From: newsgroups at jhrothjr.com (John Roth)
Date: Wed, 21 Jan 2004 16:34:26 -0500
Subject: Redefining __call__ in an instance
References: <73b00f0c.0401151529.676347b6@posting.google.com>
	<x7KdnVMXjpAPq5rdRVn-sw@comcast.com>
	<73b00f0c.0401211013.29b5718a@posting.google.com>
Message-ID: <100ts518i4qvqe7@news.supernews.com>


"Robert Ferrell" <ferrell at diablotech.com> wrote in message
news:73b00f0c.0401211013.29b5718a at posting.google.com...
> Jason Mobarak <jmob at nospam__unm.edu> wrote in message
news:<x7KdnVMXjpAPq5rdRVn-sw at comcast.com>...
> > def firstFunc (s, word='up'):
> >    print "foo"
> >
> > class callNoWork(object):
> >    def __new__ (cls):
> >      cls.__call__ = firstFunc
> >      return object.__new__(cls)
> >
> > callNoWork()()
> >
> > # Dunno if you've read this, but it explains this:
> > # http://python.org/2.2.1/descrintro.html
>
> Thanks for the pointer.  I had read this a while ago, it didn't all
> sink in, and I'd forgotten about it.  That was exactly the info that I
> needed.  In particular, it says that __call__ is a static method, so
> it is not possible to define that differently for each instance.
>
> The code above was a good reminder for me, but because __call__ is a
> static method, any new instantiation redefines __call__ for all
> existing instances.

Huh, what? __call__() is *not* a static method. It's a perfectly
ordinary instance method, and there is nothing in the document
above that says anything different.

What it is is a static *attribute.* That's a different animal
entirely. Static attributes cannot be overridden by defining
them in an instance.

The entire issue is that old style and new style classes
treat a __call__ method in an instance differently. New style
classes ignore it, old style classes use it.

John Roth

>
> Thanks for the pointer,
> -robert




From __peter__ at web.de  Sat Jan 31 12:58:36 2004
From: __peter__ at web.de (Peter Otten)
Date: Sat, 31 Jan 2004 18:58:36 +0100
Subject: problem with weakref.proxy
References: <diose1-fr8.ln1@smell.butthole.homeunix.net>
	<bvgot4$7aj$01$1@news.t-online.com>
Message-ID: <bvgqcc$q2t$04$1@news.t-online.com>

Peter Otten wrote:

> I'd recommend being lazy and using a WeakValueDictionary instead of
> building the machinery on your own. Your code would then look similar to

If you want to keep your original design, just use ref instead of proxy:

import weakref

class GOb:

    __olist=[]

    def c_show_all():
        print "all GObs, sorted by priority:"
        for i in GOb.__olist:
            i().show()

    def proxy_callback(x):
        print "weakref.proxy callback"
        GOb.__olist.remove(x)

    proxy_callback=staticmethod(proxy_callback)
    c_show_all=staticmethod(c_show_all)

    def __init__(self, name="GOB", priority=0):
        self.priority=priority
        self.name=name
        ref=weakref.ref(self, GOb.proxy_callback)
        GOb.__olist.append(ref)
        GOb.__olist.sort(lambda x, y: cmp(x(), y()))

    def __del__(self):
        print "Destruktor called for GOB " + self.name

    def show(self):
        print self.name + " " + str(self.priority)

    def __cmp__(self, other):
        if self.priority < other.priority:
            return -1
        elif self.priority == other.priority:
            return 0
        else:
            return 1

if __name__ == '__main__':

    a=GOb("T1", 0)
    b=GOb("T2", 2)
    c=GOb("T3", 1)

    GOb.c_show_all()
    print "delete T1:"
    del a
    GOb.c_show_all()

The line that failed in your original version is

GOb.__olist.remove(x)

because x is found in __olist by comparing against the list items - and the
proxy automatically delegates this to the no longer existing object. With
ref you have to explicitly dereference by calling (as seen in
__olist.sort() in the __init__() method).
As that step is not performed by the list.remove() method, only ref instead
of GOb instances are compared and the callback succeeds.

Peter 





From fuka at fuxoft.cz  Sun Jan  4 13:31:34 2004
From: fuka at fuxoft.cz (Frantisek Fuka)
Date: Sun, 04 Jan 2004 19:31:34 +0100
Subject: Progress indicator during FTP upload
Message-ID: <bt9m62$15te$1@ns.felk.cvut.cz>

My application uses ftplib to upload files to remote server. What is the 
cleanest way to provide progress indicator for long files? What exactly 
should I override in the ftplib (I am not very proficient in the FTP 
protocol)?

Thanks

-- 
                                          Frantisek Fuka
(yes, that IS my real name)
(and it's pronounced "Fran-tjee-shek Foo-kah")
----------------------------------------------------
My E-mail:   fuka at fuxoft.cz
My Homepage: http://www.fuxoft.cz
My ICQ:      2745855


From R.Brodie at rl.ac.uk  Fri Jan 23 12:09:54 2004
From: R.Brodie at rl.ac.uk (Richard Brodie)
Date: Fri, 23 Jan 2004 17:09:54 -0000
Subject: Sending Through ^] Through telnetlib
References: <mailman.687.1074866920.12720.python-list@python.org>
Message-ID: <burkh3$17la@newton.cc.rl.ac.uk>


"John Abel" <john.abel at pa.press.net> wrote in message
news:mailman.687.1074866920.12720.python-list at python.org...

> I have written a script that makes a telnet connection, runs various
> commands, and returns the output.  That was the easy bit :)  However, to
> close the session, I need to send ^] followed by quit.

Are you sure that just calling close() isn't what you want?
It would be unusual to send ^]quit on the wire.




From bignose-hates-spam at and-benfinney-does-too.id.au  Tue Jan 27 20:13:56 2004
From: bignose-hates-spam at and-benfinney-does-too.id.au (Ben Finney)
Date: 28 Jan 2004 12:03:56 +1050
Subject: Running python automatically in the background
References: <1e4e0378.0401271729.3ea6b5c2@posting.google.com>
Message-ID: <slrnc1e4c4.14j.bignose-hates-spam@rose.localdomain.fake>

On 27 Jan 2004 17:29:53 -0800, Alfred wrote:
> i'm trying to figure out if there is some easy way to run a python
> script in the background _without_ specifying "&" in a linux
> enivornment.
>
> script.py &

That's how you tell any POSIX-compatible shell (like bash) to execute a
command as a background job.  Why is that not acceptable?

> been looking around but couldn't find any docs to support a
> possibility.

Perhaps if you explain what it is you're trying to achieve, we can offer
a better solution.

-- 
 \     "We used to laugh at Grandpa when he'd head off and go fishing. |
  `\      But we wouldn't be laughing that evening when he'd come back |
_o__)           with some whore he picked up in town."  -- Jack Handey |
Ben Finney <http://bignose.squidly.org/>


From christian.eslbauer at liwest.at  Sat Jan  3 09:19:17 2004
From: christian.eslbauer at liwest.at (EsC)
Date: Sat, 3 Jan 2004 15:19:17 +0100
Subject: SMTP - Topic & add files
Message-ID: <1073137983.983243@news.liwest.at>

Hy!

probably a dummy question, but i don't
know how to set a Topic-Text and add
Files to an email ...

i use the SMTPLIB module and the
function/method: .sendmail(from,to,msg)

but how can i set a topic Text?
is there an other function/method, or
must it be encoded within the message-text?

thanks for your help
EsC




From jcarlson at nospam.uci.edu  Wed Jan 28 10:12:47 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Wed, 28 Jan 2004 07:12:47 -0800
Subject: I support PEP 326
In-Reply-To: <mailman.915.1075301602.12720.python-list@python.org>
References: <698f09f8.0401272000.79704ef0@posting.google.com>	<mailman.654.1074788734.12720.python-list@python.org>	<698f09f8.0401271318.21c9ca72@posting.google.com>	<bv6ph8$181$1@news.service.uci.edu>	<20040128041023.2EB9225B353@bonanza.off.ekorp.com>	<20040128090205.GA3086@nl.linux.org>
	<mailman.915.1075301602.12720.python-list@python.org>
Message-ID: <bv8jli$ddk$1@news.service.uci.edu>

Skip Montanaro wrote:
>     >> That's a _lot_ of stuff in one module. Even if you exclude the 40-odd
>     >> exceptions that are there, that's still a lot of guff in one big flat
>     >> namespace.
> 
>     Gerrit> Any plans to clean it up in Python 3.0?
> 
> Yes, there has been some discussion about this on python-dev.  It doesn't
> appear a PEP's been written yet.
> 
> Skip

Hey Skip,

I know you commented on the flat namespace of __builtin__, but I've not 
seen any comments on PEP 326.  Don't feel like you need to answer, but 
what are your feelings on it (even if you hate the PEP and give it a -1, 
you'll not hurt my feelings)?

  - Josiah


From aahz at pythoncraft.com  Sun Jan 18 10:22:17 2004
From: aahz at pythoncraft.com (Aahz)
Date: 18 Jan 2004 10:22:17 -0500
Subject: Python used in Freedom Force
References: <4BDF2B3C-464A-11D8-B48D-000A959CB2EC@netmail.to>
	<mailman.392.1074170206.12720.python-list@python.org>
	<4006911e$0$327$e4fe514c@news.xs4all.nl>
	<b68f71a7.0401180343.579a8568@posting.google.com>
Message-ID: <bue8b9$mpu$1@panix1.panix.com>

In article <b68f71a7.0401180343.579a8568 at posting.google.com>,
Alan James Salmoni <alan_salmoni at yahoo.com> wrote:
>
>Perhaps all this stuff could be put onto the "Python Success Stories"
>part of the python.org website? It's not public, but if the language
>is clearly being used...

Currently, due to the load on the webmasters and the available time,
http://www.pythonology.com/
is better maintained.  Send e-mail to the pythonology webmaster to get
something included.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

A: No.
Q: Is top-posting okay?


From hwlgw at hotmail.com  Fri Jan 16 06:36:06 2004
From: hwlgw at hotmail.com (Will Stuyvesant)
Date: 16 Jan 2004 03:36:06 -0800
Subject: Printing to console, no scroll
References: <xqxr7y2sq9l.fsf@cola2.ca.boeing.com>
	<20040114190048.06766.00000030@mb-m21.aol.com>
Message-ID: <cb035744.0401160336.7eebdd24@posting.google.com>

> I use it on my os2 2.1 laptop for which I don't have curses or tkinker libs.

Do you also know how to get it to work on a Windows XP laptop?  I
tried cmd.exe and command.com, but they don't so ansi.


From amy-g-art at cox.net  Wed Jan 21 20:41:56 2004
From: amy-g-art at cox.net (Amy G)
Date: Wed, 21 Jan 2004 17:41:56 -0800
Subject: Side note:  Praise to the contibuters to this group
Message-ID: <DTFPb.15072$AA6.9820@fed1read03>

I just wanted to take a second and thank all of the contributors to this
awesome newsgroup.

I am subscribed to a whole bunch of newsgroups for work as well as personal
use.  Of all of the groups, I find this one to have the most thorough
responses and the most helpful members.  I have personally only been
programming in python for a little over 2 months, but have already received
phenomenal aide from the brainiacs who lurk about.

So, thank you.  Thank you to all who have helped me, and to all who have
helped others to better understand this awesome programming language.








From jjl at pobox.com  Tue Jan 13 13:02:35 2004
From: jjl at pobox.com (John J. Lee)
Date: 13 Jan 2004 18:02:35 +0000
Subject: Why learn Python ??
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<btubno$bd8k6$1@ID-46268.news.uni-berlin.de>
	<100655fo84c2211@corp.supernews.com>
	<btv7gf$btv1p$1@ID-46268.news.uni-berlin.de>
	<87d69og2jl.fsf@pobox.com>
	<bu0v9v$c6nr4$1@ID-46268.news.uni-berlin.de>
Message-ID: <873cajafr8.fsf@pobox.com>

"Derek" <none at none.com> writes:
[...]
> Point taken.  I once worked on a project where we implemented a
> production system in C++ and then implemented it again in Python for
> QA purposes.  It took about 150k lines of C++ code and 10k lines of
> Python.  Python took less code because so many modules are bundled
> with the language, but the C++ system ran many times faster.  It's all
> about picking the right tool for the job.

Well, that's a banal truism obscuring the fact that, for the great
majority of projects, optimisation does not require implementation of
the *entire* system in a language like C++.  The sum of C++ and Python
is greater than the parts.


John


From dsarrazinNOSPAMPLEASE at cyberus.ca  Mon Jan 12 05:41:01 2004
From: dsarrazinNOSPAMPLEASE at cyberus.ca (Denis Sarrazin)
Date: Mon, 12 Jan 2004 05:41:01 -0500
Subject: Division oddity
References: <ssn3009029rrug3l8dk1pn06tqd019ucld@4ax.com>
	<7at3005sjtd6clgfm6e7v1gq83ohlrc2td@4ax.com>
	<6b2dnS9lM559YpzdRVn-ig@comcast.com>
Message-ID: <fcu40012r3tlbq95osio97fu4ut4msqq3u@4ax.com>

Thanks. I'd not realized that we could test out new changes to Python
within existing Python code. Cool.

-D

Le Mon, 12 Jan 2004 02:49:45 -0700, Jason Mobarak <jmob at unm.edu> a
?crit :

>Please note: "from __future__ import division", see PEP 238 which 
>changes the behavior of the divisino operator.




From frithiof.jensen at removethis.ted.ericsson.dk  Mon Jan 12 05:52:10 2004
From: frithiof.jensen at removethis.ted.ericsson.dk (Frithiof Andreas Jensen)
Date: Mon, 12 Jan 2004 11:52:10 +0100
Subject: Python is far from a top performer according to benchmark
	test...
References: <ryELb.238$tK2.228@amstwist00> <btn5db$2f8$1@absinth.dialog.net.pl>
	<pan.2004.01.09.21.35.40.132608@yahoo.com>
	<6ee58e07.0401092129.302cb9d4@posting.google.com>
	<pan.2004.01.11.06.08.18.867825@yahoo.com>
Message-ID: <bttu62$gdh$1@newstree.wise.edt.ericsson.se>


"Samuel Walters" <swalters_usenet at yahoo.com> wrote in message
news:pan.2004.01.11.06.08.18.867825 at yahoo.com...

> As I see it, when one considers which language is best for one's needs,
> one considers a couple of things:
>
> 1)  Does the language have the semantics I want.
> 2)  Does the language have the primitives I need.
> 3)  Can I *easily* build any missing or suboptimal primitives.
>

True.

> One would assume that Fortran has the proper semantics for numerical
> processing because it seems to have been wildly successful for a long
> period of time.

That, in my opinion, is wrong: Fortran is successful because it was there
first!

There exists a very large set of actively supported and proven libraries,
NAG f.ex., which nobody will ever bother to port to another language just
for the sake of it, and Fortran has been around for so long that it is well
understood how best to optimise and compile Fortran code. It is easy enough
to link with NAG if one needs to use it.

> Fortran naturally comes with the primitives for numerical processing,
> because numerical processing is its stated goal. ("FORmula TRANslation")

...or maybe the name sounded cool ;-)

> Whether one uses Fortran, Python, or any other language, all primitives
> are eventually implemented in either C or assembly.  At some point or
> another, we end up scraping bare metal and silicon to get our answers.

Exactly - Fortran in itself does not do something that another language
cannot do as well. It is just the case that Fortran is better understood
when applied to numering processing than other languages because more
"numerics" people used it than any other language.

On DSP architectures, f.ex., I doubt that one would have better performance
using Fortran in comparison with the C/C++ tools, DSP's usually ship with -
because DSP's were "born" when C/C++ was hot.

A lot of real, serious DSP work is done in Mathlab - thus skipping the issue
of language choice and getting right onto getting the job done. This is good
IMO.





From jepler at unpythonic.net  Tue Jan 27 11:37:04 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Tue, 27 Jan 2004 10:37:04 -0600
Subject: Problem with RE matching backslash
In-Reply-To: <9114f8b2d460bc916150d0ae96a69ea7@news.meganetnews.com>
References: <7b5e60b8754ab5afcea58d4ecc8b8849@news.meganetnews.com>
	<bv60fk$lu8$05$1@news.t-online.com>
	<9114f8b2d460bc916150d0ae96a69ea7@news.meganetnews.com>
Message-ID: <20040127163703.GM18498@unpythonic.net>

On Tue, Jan 27, 2004 at 03:31:24PM +0000, Ladv?nszky K?roly wrote:
> Thanks for your quick and very helpful reply, Peter.
> What is still not clear to me is why  the search examples work and yield
> 'm'.

Because the first pattern, which you wrote as "\\m", will match a lone
'm'.  So 'match' fails, because m is not in the first position.  But
'search' succeeds at index 1.

Jeff



From Pieter.Claerhout at Creo.com  Wed Jan 28 08:13:11 2004
From: Pieter.Claerhout at Creo.com (Pieter Claerhout)
Date: Wed, 28 Jan 2004 14:13:11 +0100
Subject: Oracle beginner problem: can't connect to Oracle using cx_Ora
	cle
Message-ID: <490316A24CC5D411ACD700B0D078F7F003915E2E@cseexch01.cse.creoscitex.com>

http://www.google.be/search?ie=utf-8&oe=utf-8&hl=nl&q=ORA-12514&btnG=google

This google search will give you lot's of clues.

Cheers,


pieter

Creo
pieter claerhout | product support prinergy | tel: +32 2 352 2511 |
pieter.claerhout at creo.com | www.creo.com

IMAGINE CREATE BELIEVE(tm)


-----Original Message-----
From: Aurelio Martin [mailto:amartin at wpsnetwork.com] 
Sent: 28 January 2004 13:55
To: python-list at python.org
Subject: Re: Oracle beginner problem: can't connect to Oracle using
cx_Oracle




Benson, John wrote:
> Hi, I'm a non-Oracle guy just starting to use Python to explore Oracle.
> I enclose the Python command prompt log for the usage example further
> down with only the user, password and host names changed to keep me out
> of trouble. But first, I'd like to point out that I'm able to logon to
> myhost, and get into the following via SQL*Plus using myuser/mypassword
> 
> Oracle8i Enterprise Edition Release 8.1.7.3.0 - Production 
> With the Partitioning option                               
> JServer Release 8.1.7.3.0 - Production
> 
> (end quote of Unix box SQL*Plus stuff)  
> 
> so I know that myuser/mypassword works for SQL*Plus on the myhost Unix
> box.
> 
> I downloaded the cx_Oracle Python interface to Oracle(r) Version: 4.0
> Date: December 17, 2003 Win32 binary for Oracle 8i, Python 2.) and
> proceeded to exercise the usage example:                   
> 
> PythonWin 2.3.2 (#49, Oct  2 2003, 20:02:00) [MSC v.1200 32 bit (Intel)]
> on win32.
> Portions Copyright 1994-2001 Mark Hammond (mhammond at skippinet.com.au) -
> see 'Help/About PythonWin' for further copyright information.
> 
>>>>import cx_Oracle
>>>>connection = cx_Oracle.connect("myuser/mypassword at myhost")
> 
> Traceback (most recent call last):
>   File "<interactive input>", line 1, in ?
> DatabaseError: ORA-12514: TNS:listener could not resolve SERVICE_NAME
> given in connect descriptor
> 

I think it's a problem with the connection data in your Windows PC.
You have tested a local connection ( user/password ) on the Unix host 
with SQL*Plus.
Have you tried a remote connection ( user/password at host ) from your 
Windows PC with SQL*Plus ?
I think you will find the same problem if you try it with SQL*Plus.

Probably the connection data in your TNSNAMES.ORA file is not correct.

Hope this helps

	Aurelio

-- 
http://mail.python.org/mailman/listinfo/python-list



From dave at boost-consulting.com  Sun Jan  4 08:11:42 2004
From: dave at boost-consulting.com (David Abrahams)
Date: Sun, 04 Jan 2004 08:11:42 -0500
Subject: Advanced (?) compiling, freezing, translating Python
References: <312735AC.3841CC26.0331AA34@netscape.net>
Message-ID: <ur7yfj1td.fsf@boost-consulting.com>

luszczek1 at netscape.net writes:

> Hi,
>
> here's my problem:
>
> - I know it will take me 10 times as long to write a code in C than in
>   Python
> - I need the speed of the C version
> - my program cannot depend/require on Python
>   interpreter/libraries/modules
>
> Is there a way to write Python program that almost looks like (say) C
> and then transoform it into C. Transformation should be intelligent -
> I don't want dynamic objects with dictionaries of methods. I'm willing
> to provide type descriptions so when I say:
> myList = [0] * 100
>
> I get in C:
> int *myList;
> myList = calloc(100, sizeof(int));
>
> I'm aware of projects like Pyrex, Psyco, and Pypy but their scope is
> too broad: they are about Python in its entirety and dynamism.

I think you're underestimating the actual scope of what you're trying
to describe... but anyway, here's another one you probably aren't
interested in because it's too broad ;-)

  http://felix.sf.net

-- 
Dave Abrahams
Boost Consulting
www.boost-consulting.com




From gandalf at geochemsource.com  Fri Jan 30 02:23:26 2004
From: gandalf at geochemsource.com (Gandalf)
Date: Fri, 30 Jan 2004 08:23:26 +0100
Subject: wxNotebook question
References: <5.2.0.4.0.20040129151313.02127918@blue-cove.com>
Message-ID: <401A066E.2080604@geochemsource.com>

>
>
>> How can I hide/show a page (wxNotebookPage) invisible of a 
>> wx.wxNotebook instance?
>> There is a GetPage() method which returns a wxNotebookPage but I 
>> could not find
>> any documentation in the help about this class. 
>
>
> I use:
> C:\Python23\Lib\site-packages\wxPython\docs\wx.chm
> always, but
> http://www.orbtech.com/www/wx/epydoc/
> is great, and shows inherited properties


Thanks, epydoc is the best. (Note: I meant wxNotebookPage, there is no
doc about wxNotebookPage in the wx.chm)

>> I thought there will be a 'SetVisible'
>> or 'SetTabvisible' method but it seems to be a proxy for the root 
>> control on that page.
>> So I cannot even get method names by dir(self.notebook.GetPage(0)).
>
>
> Check the "Show()" method
> Show <wx.Window-class.htm#Show>(self, show)
> (inherited from Window <wx.Window-class.htm>) 

Thanks. I was blind. I searched the docs but I looked for 'Visible' only.
Bad habit from a Delphi programmer. :-)

   G
-------------- next part --------------
An HTML attachment was scrubbed...
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From ryangrow at yahoo.com  Fri Jan 23 14:05:41 2004
From: ryangrow at yahoo.com (Ryan Grow)
Date: Fri, 23 Jan 2004 11:05:41 -0800 (PST)
Subject: fcntl O_NDELAY constant not found in python 2.3 on linux
Message-ID: <20040123190541.31213.qmail@web21206.mail.yahoo.com>

Hi,

I'm trying to use fcntl to set an existing file
descriptor to be nonblocking. This contrived example
exhibits the behavior of python that is preventing me
from doing this:

import os, fcntl, FCNTL

file = open("/tmp/testfd.txt", 'w')
fd = file.fileno()
fl = fcntl.fcntl(fd, FCNTL.F_GETFL)
fcntl.fcntl(fd, FCNTL.F_SETFL, fl | FCNTL.O_NDELAY)
print "Made it!"


When I run this in the following environment, it works
fine:

Linux Kernel 2.4.7-10
python 2.1.1


[rgrow at linux01 python]$ /usr/bin/python2.1
./testfcntl.py
Made it!



However, when I run this with either python 2.3.2 or
2.3.3, I get the following output:

[rgrow at linux01 python]$ python ./testfcntl.py

/usr/local/lib/python2.3/FCNTL.py:7:
DeprecationWarning: the FCNTL module is deprecated;
please use fcntl
  DeprecationWarning)
Traceback (most recent call last):
  File "./testfcntl.py", line 6, in ?
    fcntl.fcntl(fd, FCNTL.F_SETFL, fl |
FCNTL.O_NDELAY)
AttributeError: 'module' object has no attribute
'O_NDELAY'


What is the correct way that I should be making this
kind of a call in 2.3 to both avoid the deprecation
warning as well as the attribute error?

Thanks,

Ryan




__________________________________
Do you Yahoo!?
Yahoo! SiteBuilder - Free web site building tool. Try it!
http://webhosting.yahoo.com/ps/sb/



From amartin at wpsnetwork.com  Wed Jan 28 07:55:22 2004
From: amartin at wpsnetwork.com (Aurelio Martin)
Date: Wed, 28 Jan 2004 13:55:22 +0100
Subject: Oracle beginner problem: can't connect to Oracle using cx_Oracle
In-Reply-To: <mailman.883.1075258268.12720.python-list@python.org>
References: <mailman.883.1075258268.12720.python-list@python.org>
Message-ID: <bv8bgi$ptnu3$1@ID-50400.news.uni-berlin.de>



Benson, John wrote:
> Hi, I'm a non-Oracle guy just starting to use Python to explore Oracle.
> I enclose the Python command prompt log for the usage example further
> down with only the user, password and host names changed to keep me out
> of trouble. But first, I'd like to point out that I'm able to logon to
> myhost, and get into the following via SQL*Plus using myuser/mypassword
> 
> Oracle8i Enterprise Edition Release 8.1.7.3.0 - Production 
> With the Partitioning option                               
> JServer Release 8.1.7.3.0 - Production
> 
> (end quote of Unix box SQL*Plus stuff)  
> 
> so I know that myuser/mypassword works for SQL*Plus on the myhost Unix
> box.
> 
> I downloaded the cx_Oracle Python interface to Oracle(r) Version: 4.0
> Date: December 17, 2003 Win32 binary for Oracle 8i, Python 2.) and
> proceeded to exercise the usage example:                   
> 
> PythonWin 2.3.2 (#49, Oct  2 2003, 20:02:00) [MSC v.1200 32 bit (Intel)]
> on win32.
> Portions Copyright 1994-2001 Mark Hammond (mhammond at skippinet.com.au) -
> see 'Help/About PythonWin' for further copyright information.
> 
>>>>import cx_Oracle
>>>>connection = cx_Oracle.connect("myuser/mypassword at myhost")
> 
> Traceback (most recent call last):
>   File "<interactive input>", line 1, in ?
> DatabaseError: ORA-12514: TNS:listener could not resolve SERVICE_NAME
> given in connect descriptor
> 

I think it's a problem with the connection data in your Windows PC.
You have tested a local connection ( user/password ) on the Unix host 
with SQL*Plus.
Have you tried a remote connection ( user/password at host ) from your 
Windows PC with SQL*Plus ?
I think you will find the same problem if you try it with SQL*Plus.

Probably the connection data in your TNSNAMES.ORA file is not correct.

Hope this helps

	Aurelio



From eric.brunel at N0SP4M.com  Tue Jan 20 03:59:16 2004
From: eric.brunel at N0SP4M.com (Eric Brunel)
Date: Tue, 20 Jan 2004 09:59:16 +0100
Subject: Tk Icon - request to Fredrik Lundh
References: <8089854e.0401190436.10f99713@posting.google.com>
	<bugqir$lds$1@news-reader2.wanadoo.fr>
	<8089854e.0401200031.445728d9@posting.google.com>
Message-ID: <buiq5k$fvm$1@news-reader2.wanadoo.fr>

Fuzzyman wrote:
> Eric Brunel <eric.brunel at N0SP4M.com> wrote in message news:<bugqir$lds$1 at news-reader2.wanadoo.fr>...
> 
>>Fuzzyman wrote:
>>
>>>There is a very interesting (and potentially useful) program on the
>>>effbot website - called Tkicon.
>>>
>>>http://www.effbot.org/downloads/
>>>
>>>Unfortuantely the last supported version of python is 2.1
>>>I've seen a few people asking, but never an answer, on Python 2.3
>>>support.
>>
>>This utility should not be needed anymore if you're using a recent version of 
>>tcl/tk: the method wm_iconbitmap on toplevel's, that didn't work on earlier 
>>versions of tk on Windows, now works without problem. You should specifiy a .ico 
>>or .icr file name as its argument. See the documentation for the corresponding 
>>tk command at:
>>http://www.tcl.tk/man/tcl8.3/TkCmd/wm.htm#M15
>>
> 
> 
> Hmmm..... reading the documentation makes things less clear :-)
> 
> How about :
> 
> test = tkinter.Toplevel(wm_iconbitmap='test.ico') 

Nope:

test = Tkinter.Toplevel()
test.wm_iconbitmap('test.ico')

All tcl/tk wm commands map to the corresponding wm_... *method* on Tkinter 
objects. It indeed takes some time to get used to...

HTH
-- 
- Eric Brunel <eric dot brunel at pragmadev dot com> -
PragmaDev : Real Time Software Development Tools - http://www.pragmadev.com



From francisgavila at yahoo.com  Thu Jan 22 15:24:24 2004
From: francisgavila at yahoo.com (Francis Avila)
Date: Thu, 22 Jan 2004 15:24:24 -0500
Subject: performing action on set of charecters
References: <cdac0350.0401220751.618353a3@posting.google.com>
Message-ID: <1010ce6opqvuv13@corp.supernews.com>

jeff wrote in message ...
>hiya,
>
>Ive a load of binary in a file. Its 3 bit (2^3) and i wanna convert it
>to an integer.
>
>ive tried using theintergar = string.atoi(thebinary, 2), but that
>doesnt take it as 3 bit binary
>
>it has no spaces it it, so im a bit stuck as to how to do this with
>python,
>
>cheers
>
>greg

Three bit binary?!  Whoever designed that format is a sadomasochist.

You're going to have to separate out the bits in the byte stream (so that
each bit is a byte--use strings), take three-bit groupings, and multiply to
convert to integer.

If this is a single, isolated three-bit integer, your approach will involve
shifting.  If it's a continuous stream, without any padding, you can work in
groups of 24 bits (4 bytes), which gives you 8 3-bit ints.

There are many different approaches, but all will be painful.  I don't think
it would be much easier in C, either (bit manipulation is often a little
easier in C compared to Python, albeit more dangerous).

Search this group.  Not too long ago there was talk of a module for working
with binary which you might find helpful.
--
Francis Avila



From vscan at vdr.ma  Thu Jan 29 05:30:11 2004
From: vscan at vdr.ma (vscan at vdr.ma)
Date: Thu, 29 Jan 2004 10:30:11 +0000 (WET)
Subject: VIRUS IN YOUR MAIL
Message-ID: <20040129103011.5D317ADFC1C@xfusion.intranet>

                           V I R U S  A L E R T

Our viruschecker found the

	I-Worm.Mydoom 

virus(es) in your email to the following recipient(s):

-> nondmatherr at amstex.tex
-> postfix at vdr.ma

Please check your system for viruses, or ask your system administrator
to do so.

For your reference, here are the headers from your email:

------------------------- BEGIN HEADERS -----------------------------
Received: from python.org (unknown [192.168.0.119])
	by xfusion.intranet (Postfix) with ESMTP id C630BADFC06
	for <nondmatherr at amstex.tex>; Thu, 29 Jan 2004 10:30:10 +0000 (WET)
From: python-list at python.org
To: nondmatherr at amstex.tex
Subject: HI
Date: Thu, 29 Jan 2004 10:29:46 +0000
MIME-Version: 1.0
Content-Type: multipart/mixed;
	boundary="----=_NextPart_000_0003_211518AE.BC08BBF0"
X-Priority: 3
X-MSMail-Priority: Normal
Message-Id: <20040129103010.C630BADFC06 at xfusion.intranet>
-------------------------- END HEADERS ------------------------------




From max at alcyone.com  Fri Jan  9 04:11:44 2004
From: max at alcyone.com (Erik Max Francis)
Date: Fri, 09 Jan 2004 01:11:44 -0800
Subject: user/passwd entry
References: <btlqom$og6$1@news.eecs.umich.edu>
Message-ID: <3FFE7050.DAC170F0@alcyone.com>

John Smith wrote:

> I'm wondering how to enter the user and password for a site over http?
> What's the module that I should use: urllib, htmllib, HTMLParser,
> httplib?
> What are the classes I should call, etc?  Thanks for any help.

It depends on exactly how you're entering the password.  If it's just
part of a form, then you'd do it through normal CGI means.  If it's
actually HTTP authentication, then you can do that by subclassing
urllib.URLopener.

-- 
 __ Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
/  \ San Jose, CA, USA && 37 20 N 121 53 W && &tSftDotIotE
\__/ No one should have to dance backward all their lives.
    -- Jill Ruckelshaus


From sambo at void.com  Fri Jan 23 12:33:40 2004
From: sambo at void.com (sambo)
Date: Fri, 23 Jan 2004 09:33:40 -0800
Subject: Assignment to slice
References: <mailman.604.1074712550.12720.python-list@python.org>	<20040121130236.D8E3.JCARLSON@uci.edu>
	<mailman.619.1074727680.12720.python-list@python.org>
Message-ID: <40115AF4.4070709@void.com>



Rich Krauter wrote:

> I'm just surprised that nobody thinks it's unusual.
>
> >>> x = []
> >>> x[4] = 5 
> Python says "Wrong! Can't do that! I'm quitting now!"
> >>> x = []
> >>> x[4:5] = [1,2,3,4,5]
> Python says "Ok. Cool. Those indices don't exist in x so I'll just 
> stick your list at the beginning,
> and the indices you used in the slice have nothing to do with where 
> the elements end up,
> since they don't exist in the list anyway."
>
> To me that doesn't look much different than if python were to do this: 
> (not real code obviously)
> <fiction>
> >>> x = []
> >>> x[4] = 5
> >>> x
> [5]
> Python says "Well, x[4] doesn't exist so you must have meant x[0]."
> <fiction>
>
> That would make no sense. So why does it make sense to do that same 
> exact thing if you're
> assigning to a slice, instead of an element?
>
> That's what I see as inconsistent; not that python does not behave 
> just like perl. I'm sure that
> a little more time will reveal this 'inconsistency' as a shortcoming 
> in the wiring of my brain, and
> not a weird python idiosyncrasy. It's cool to hear other people's take 
> on it.
> Thanks alot.
> Rich
>
>
Well one might argue, I suppose, that the key word here is LIST - good 
for storing strings not so for numeric data/matrixes.

Imagine my surprise when I was trying to find my numeric command line 
arguments with int()
only to find int( "string" ) != 0 but an exception is raised instead.

Cheers



From NAIGIMSESRIMAIL at gims.com  Tue Jan 27 07:20:36 2004
From: NAIGIMSESRIMAIL at gims.com (GroupShield for Exchange (ESRIMAIL))
Date: Tue, 27 Jan 2004 14:20:36 +0200
Subject: ALERT -  GroupShield ticket number OA1720_1075206030_ESRIMAIL_3 w
	as generated
Message-ID: <B06B8FEF47ACD7119E720040F428459101F64FF6@ESRIMAIL>

Action Taken:
The attachment was quarantined from the message and replaced with a text
file informing the recipient of the action taken.

To:
python-list at python.org <python-list at python.org>

From:
ciwwy at aol.com <ciwwy at aol.com>

Sent:
-1211817472,29615281

Subject:
Error

Attachment Details:-

Attachment Name: ATT12795.txt
File: ATT12795.txt
Infected? No
Repaired? No
Blocked? Yes
Deleted? No
Virus Name: 



	
-------------- next part --------------
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From maxm at mxm.dk  Mon Jan 19 07:18:57 2004
From: maxm at mxm.dk (Max M)
Date: Mon, 19 Jan 2004 13:18:57 +0100
Subject: Does anyone else not find the fun in programming...?
In-Reply-To: <slrnc0loum.u28.ramen@lackingtalent.com>
References: <d232c5e.0401130823.27fd26ff@posting.google.com>
	<4004f5ac$0$69931$edfadb0f@dread12.news.tele.dk>
	<slrnc0jc91.75d.ramen@lackingtalent.com>
	<400a7a92$0$205$edfadb0f@dread12.news.tele.dk>
	<slrnc0loum.u28.ramen@lackingtalent.com>
Message-ID: <400bcb2b$0$180$edfadb0f@dread12.news.tele.dk>

Dave Benjamin wrote:

> So, a data-flow style more or less... that seems to be a useful model for
> music software. Have you ever played around with Max?

No. I tried c-sound, and while it was interesting, it was really 
cumbersome at the level I am interested in.

> Yeah, makes perfect sense to me. Do you have any Python-generated songs
> available? Sounds really cool.

Nothing I will release. Mostly pre-studies.

> The thing I was working on was a probabilistic beat generator, based on
> statistics of when a certain drum would hit in a beat for a selection of hip
> hop songs. I was trying to capture the "feel" rather than the exact sequence
> of sounds.

That is a good way to go. Bayes networks for rythmical patterns.


regards Max M


From Kyler at Lairds.com  Tue Jan 20 18:48:55 2004
From: Kyler at Lairds.com (Kyler Laird)
Date: Tue, 20 Jan 2004 18:48:55 -0500
Subject: calling Pyrex results from C
In-Reply-To: <20040120172733.GA7666@titan.progiciels-bpi.ca>
References: <f7tvd1-a1o.ln1@jowls.lairds.org>
	<20040120172733.GA7666@titan.progiciels-bpi.ca>
Message-ID: <20040120234855.GV22782@jowls>

On Tue, Jan 20, 2004 at 12:27:33PM -0500, Fran?ois Pinard wrote:

> There is some magic needed to establish Python context, not much.
> Hoping that it will help, here is a template I use when generating
> Pyrex main programs.

Paul started me on this path and you've given me exactly what I need to
keep going.

Thank you!

--kyler




From mark at mceahern.com  Sun Jan  4 22:45:56 2004
From: mark at mceahern.com (Mark McEahern)
Date: Sun, 04 Jan 2004 21:45:56 -0600
Subject: Why does this fail?
In-Reply-To: <vvhkngs7oachad@corp.supernews.com>
References: <vvhdlm72386b3c@corp.supernews.com>
	<vvhkngs7oachad@corp.supernews.com>
Message-ID: <1073274355.12941.27.camel@dev.internal>

On Sun, 2004-01-04 at 20:58, Dave Murray wrote:
[...]
> I have found the library for html/sgml to be not very robust. Big .php and
> .html with lot's of cascades and external references break it very
> ungracefully (sgmllib.SGMLParseError: expected name token).

I'd suggest using htmllib.

// m




From mike at triplepc.com  Sat Jan 10 14:21:29 2004
From: mike at triplepc.com (Michael T. Babcock)
Date: Sat, 10 Jan 2004 14:21:29 -0500
Subject: Straw poll on Python performance (was Re: Python is far from
 a top performer ...)
In-Reply-To: <E1AfJWJ-0000N7-Ly@mail.python.org>
References: <E1AfJWJ-0000N7-Ly@mail.python.org>
Message-ID: <400050B9.5070904@triplepc.com>

>
>
>From: "Peter Hansen" <peter at engcorp.com>
>
>I have to say that I do, but I'm also dealing with datasets up to about
>500MB in the worst case - but about 10-20MB in the normal case.
>

I have one customer for whom I'm writing software to parse large (~1GB) 
Quark Express documents and for the initial months of the project, 
optimization was a large piece of the coding process.  Rewriting and 
rewriting to get the information I needed as quickly as possible.

Considering the initial version of the program took all night to parse 
the file and I'm down to about 40 minutes now, its been quite a ride.  
That said, over the entire length of the project, about 80-90% of my 
time will be straight user interface coding with very little (or no) 
time spent on optimization, so my net optimization time by the end of 
the project will be quite low again.

This is similar to a comment made by someone else re: library 
programmers now that I think about it.
-- 
Michael T. Babcock
http://www.fibrespeed.net/~mbabcock/code



From irmen at -NOSPAM-REMOVETHIS-xs4all.nl  Mon Jan  5 17:27:04 2004
From: irmen at -NOSPAM-REMOVETHIS-xs4all.nl (Irmen de Jong)
Date: Mon, 05 Jan 2004 23:27:04 +0100
Subject: local interpreter remote machines
In-Reply-To: <btcka7$phd$1@solaris.cc.vt.edu>
References: <btcka7$phd$1@solaris.cc.vt.edu>
Message-ID: <3ff9e4b8$0$318$e4fe514c@news.xs4all.nl>

hokieghal99 wrote:

> This may not be possible, but I thought I'd ask anyway. Could I get the 
> below code to run on a Python server where other machines would connect 
> to it (say thru the Web) and get details of *their* system instead of 
> the system details of the machine that the interpreter is running on? 
> Any ideas?

If you also have Python running on the other machine,
you can do this very easily with Pyro: http://pyro.sourceforge.net
(no network programming necessary at all).

Essentially you create an object on the remote machine that contains
a method with the code you want to execute, and you call that object
-using Pyro- as if it was located on your own computer.

But this only works if you have a supported Python version running
on the remote machine, and that you are allowed to connect to that
machine over the network.

You can even create some python code on your local machine, and
actually submit that to the other machine, let it deal with it,
and then get the results back.
But only do this if you know that no unauthorised user can do this,
because this is a security risk.

--Irmen de Jong.


From mwh at python.net  Wed Jan 14 06:47:03 2004
From: mwh at python.net (Michael Hudson)
Date: Wed, 14 Jan 2004 11:47:03 GMT
Subject: Why learn Python ??
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<pan.2004.01.12.20.18.36.606924@yahoo.com>
	<tyfoet8dx61.fsf@pcepsft001.cern.ch>
Message-ID: <m3n08qwy4p.fsf@pc150.maths.bris.ac.uk>

Jacek Generowicz <jacek.generowicz at cern.ch> writes:

> Samuel Walters <swalters_usenet at yahoo.com> writes:
> 
> > because there seem to be many more introductory tutorials and a lot of
> > advice that one should learn Scheme, then move to Common Lisp.
> 
> Careful. If you were to make such a suggestion on comp.lang.lisp, then
> you'd be likely to be told that learning Scheme first will cause you
> irreversible brain damage. Of course, now that He Whose Name Must Not
> Be Mentioned is no longer posting there, 

Heeeeeeeeee's back!

Cheers,
mwh

-- 
  MAN:  How can I tell that the past isn't a fiction designed to
        account for the discrepancy between my immediate physical
        sensations and my state of mind?
                   -- The Hitch-Hikers Guide to the Galaxy, Episode 12


From nicholas_wieland at yahoo.it  Fri Jan  2 21:34:55 2004
From: nicholas_wieland at yahoo.it (Nicholas Wieland)
Date: Sat, 03 Jan 2004 03:34:55 +0100
Subject: new style shelve implementation
Message-ID: <pan.2004.01.03.02.34.49.170632@yahoo.it>

I'm using the shelve module for a program I'm writing, and reading the
source I've noted that shelve doesn't use new style classes.
Well, this is the first time I use *seriously* new style classes (I work
primarly on Zope and Python 2.1), so the result is probably far from
production code, but after half an hour of hacking my Shelf class seems to
work like the original one (much more than what I expected...) :)

class Shelf (dict):
                                                                                                                             
        def __init__ (self, dict, protocol = None, writeback = False, binary = None):
                self.dict = dict
                if protocol is not None and binary is not None:
                        raise ValueError, "can't specifiy both 'protocol' and 'binary'"
                if binary is not None:
                        warnings.warn ("The 'binary' argument to Shelf() is deprecated",
                                        PendingDeprecationWarning)
                        protocol = int (binary)
                if protocol is None:
                        protocol = 0
                self.protocol = protocol
                self.writeback = writeback
                self.cache = {}
                                                                                                                             
        def __repr__ (self):
                dummy = dict ()
                for k in self.keys ():
                        dummy [k] = self [k]
                return repr (dummy)
                                                                                                                             
        def keys (self):
                return self.dict.keys ()
                                                                                                                             
        def __len__ (self):
                return len (self)
                                                                                                                             
        def has_key (self, key):
                return self.dict.has_key (key)
                                                                                                                             
        def __contains__ (self, key):
                return self.has_key (key)
                                                                                                                             
        def get (self, key, default = None):
                if self.has_key (key):
                        return self.dict [key]
                return default
                                                                                                                             
        def __getitem__ (self, key):
                try:
                        value = self.cache [key]
                except KeyError:
                        f = StringIO (self.dict [key])
                        value = Unpickler (f).load ()
                        if self.writeback:
                                self.cache [key] = value
                return value
                                                                                                                             
        def __setitem__ (self, key, value):
                if self.writeback:
                        self.cache [key] = value
                f = StringIO ()
                p = Pickler (f, self.protocol)
                p.dump (value)
                self.dict [key] = f.getvalue ()
                                                                                                                             
        def __delitem__ (self, key):
                del self.dict [key]
                try:
                        del self.cache [key]
                except KeyError:
                        pass
                                                                                                                             
        def close (self):
                self.sync ()
                try:
                        self.dict.close ()
                except AttributeError:
                        pass
                self = None
                                                                                                                             
        def __del__ (self):
                self.close ()
                                                                                                                             
        def sync (self):
                if self.writeback and self.cache:
                        self.writeback = False
                        for key, entry in self.cache.iteritems ():
                                self.dict [key] = entry
                        self.writeback = True
                        self.cache = {}
                if hasattr (self.dict, "sync"):
                        self.sync ()
                                                                                                                             
Everything else is like the original one, I've just added a totally
unpythonic implementation of the __repr__ method and removed the UserDict
dependency.
IMVHO if UserDict is going to be removed it's good to start removing
it from the python library.
On the other hand, this is just a dirty hack, so every comment is deeply
appreciated.

Happy new year,
  nicholas


From todcsmith at yahoo.com  Fri Jan 16 18:45:38 2004
From: todcsmith at yahoo.com (todd smith)
Date: 16 Jan 2004 15:45:38 -0800
Subject: problems with os.path.isdir on windows shares (i've read the FAQ)
Message-ID: <4489035c.0401161545.75b63ce@posting.google.com>

having some strange problems with Python2.3 on windowsXP. im trying
to access shares and the os.path.isdir function _always_ returns false
even though the directories are there and i can os.chdir, os.listdir it 
in the python shell. i've followed the FAQs rule of putting the trailing '\\' 
on the share name with no luck

heres my sessioin:

>>> os.path.isdir('\\\\ren\\backup\\')
False
>>> os.chdir('\\\\ren\\backup\\')
>>> os.getcwd()
'\\\\ren\\backup'
>>> os.listdir(os.getcwd())
['ssbackup-16-1-2004.ssa', 'ssbackuptest-14-1-2004.ssa', 'tmp']


From t-meyer at ihug.co.nz  Thu Jan 29 18:39:25 2004
From: t-meyer at ihug.co.nz (Tony Meyer)
Date: Fri, 30 Jan 2004 12:39:25 +1300
Subject: Pythonwin - breaking out of infinite loop
In-Reply-To: <1ED4ECF91CDED24C8D012BCF2B034F1304D0B9E8@its-xchg4.massey.ac.nz>
Message-ID: <1ED4ECF91CDED24C8D012BCF2B034F13046778AF@its-xchg4.massey.ac.nz>

> How do I stop a Python program running in PythinWin?  I would 
> expect to be able to use CTR-C or CTRL-break etc.

If you right-click on the PythonWin icon in the tray, one of the items is
"Break into running code".  This will sometimes do it for you, and is
probably your best chance.

(It does break into "while True: pass", for example).

=Tony Meyer




From peter at engcorp.com  Mon Jan  5 17:30:40 2004
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 05 Jan 2004 17:30:40 -0500
Subject: explicit variable declaration
References: <wa9Kb.2393503$uj6.5826057@telenews.teleline.es>
	<btb9cm$3c2$1@news-reader3.wanadoo.fr>
Message-ID: <3FF9E590.7EE65247@engcorp.com>

Michel Claveau/Hamster wrote:
> 
> Hi !
> 
> "Variable" is a bad word - beurk ! -   In Python there are ref-on-objects ;
> it's without interest with declaration (explicit).

I'm not sure how helpful that is to a newbie, and in any case I've
been using Python for a reasonably long time now and I definitely
refer to those babies as variables.... with no ill effects to date.

-Peter


From c at c.com  Wed Jan 14 10:16:45 2004
From: c at c.com (chris)
Date: Wed, 14 Jan 2004 15:16:45 -0000
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
	<pan.2004.01.14.01.17.00.970198@fakeemail.com>
	<bu2ana$bmpci$1@ID-207230.news.uni-berlin.de>
	<pan.2004.01.14.04.32.52.403279@fakeemail.com>
	<bu2pim$d3pa0$1@ID-207230.news.uni-berlin.de>
Message-ID: <bu3mol$lgb$1@pump1.york.ac.uk>


"Brandon J. Van Every" <try_vanevery_at_mycompanyname at yahoo.com> wrote in
message news:bu2pim$d3pa0$1 at ID-207230.news.uni-berlin.de...
>
> "Dan Olson" <hatespam at fakeemail.com> wrote in message
> news:pan.2004.01.14.04.32.52.403279 at fakeemail.com...
> > On Tue, 13 Jan 2004 19:00:43 -0800, Brandon J. Van Every wrote:
> >
> > > I'm curious what sky is going to fall if I don't follow your advice?
> >
> > It's just advice.  I think it would have been smoother for everyone if
> > you'd followed it, but apparently you prefer to piss on my advice so
> > that's cool too.
>
> You have some deep-seated need for smootheness?  I see no a priori value
in
> smoothness.
>

And that is I think the base of all of your problems.

(sorry, long-term lurker feels urge to put in my 2c)

MrJeff




From wilkSPAM at OUTflibuste.net  Sat Jan 10 10:33:15 2004
From: wilkSPAM at OUTflibuste.net (Wilk)
Date: Sat, 10 Jan 2004 16:33:15 +0100
Subject: Asynchronous HTTP server in standard library ?
References: <btougu$o9b$1@news-reader3.wanadoo.fr>
Message-ID: <87eku76cp0.fsf@blakie.riol>

"Pierre Quentel" <quentel.pierre at wanadoo.fr> writes:

> Python standard library provides two modules for asynchronous socket
> programming : asyncore and asynchat. Several web servers have been built
> upon these modules (medusa being the best-known I suppose) and are famous
> for their performance level
>
> Unfortunately no example of use is provided in the standard library (whereas
> the more "classic" SocketServer is illustrated by BaseHTTPServer,
> SimpleHTTPServer, etc). I think it would be useful if Python came with a
> simple HTTP server written with these modules, to help beginners understand
> how use them
>
> I've written one, which handles GET and POST requests. It's inspired by (and
> partly copied from) the http subset of medusa, only reduced to less than 200
> lines. It's called SimpleAsyncHTTPServer and published on Active State
> Python Cookbook
> http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/259148
>
> Any thoughts ?

I think you'll be welcome in the web-sig !!!
http://python.org/sigs/web-sig/

-- 
Wilk - http://flibuste.net


From db3l at fitlinxx.com  Tue Jan 27 17:31:04 2004
From: db3l at fitlinxx.com (David Bolen)
Date: 27 Jan 2004 17:31:04 -0500
Subject: wxpython and wxlocale
References: <bv3ur6$bm1$1@news.ya.com> <bv403p$3ot$1@atlantis.news.tpi.pl>
	<bv5d94$52a$1@news.ya.com>
Message-ID: <un089m3br.fsf@fitlinxx.com>

"Ya" <tmartinez at ammsoft.com> writes:

> This is my code:
> The button of "OK" is not translated.
> What is wrong ?

I believe this was discussed recently on the wxPython list.  Under
Windows, wxMessageDialog creates a native Windows dialog, so
wxPython/wxWindows is not in control of the basic dialog buttons (such
as OK).  They are therefore under control of the OS as far as
internationalization goes, and will only obey the system settings.

So if you need to operate in a localized setting other than that of
the host operating system, I'm guessing you're best bet is to make
your own dialog box rather than using wxMessageDialog.

To add to the complexity (if I recall correctly), wxMessageDialog is
implemented by wxWindows itself under Linux/GTK, so you don't see the
same problem there.  Clearly not an ideal situation, but one of the
wrinkles that comes from trying to use native widgets on a platform
when available.

The wxPython list is probably a better place to get further details.

-- David


From maarten at remove_this_ws.tn.tudelft.nl  Thu Jan 15 06:04:23 2004
From: maarten at remove_this_ws.tn.tudelft.nl (Maarten van Reeuwijk)
Date: Thu, 15 Jan 2004 12:04:23 +0100
Subject: Newbie: how to write modules without C
Message-ID: <bu5s3o$70t$1@news.tudelft.nl>

I want to extend python with a framework for reading, manipulating and
visualising CFD data. Basically I want to have an environment in which I
can quickly and interactively produce results, and Python with SciPy seems
to be an ideal start. 

However, the only references I can find about writing modules talk about
using C, and that's exactly what I DON'T want to do. I don't need any
low-level operations, just handy classes that understand my file-format and
wrap SciPy features etc. 

So my questions are:
1) Is it necessary to resort to C when writing modules or can you use normal
Python?
2) How do you load a Python script into a python session?
3) Can various python scripts be combined into a module?

Thanks in advance! 


-- 
===================================================================
Maarten van Reeuwijk                        Heat and Fluid Sciences
Phd student                             dept. of Multiscale Physics
www.ws.tn.tudelft.nl                 Delft University of Technology


From linda at acm.org  Thu Jan 29 22:22:52 2004
From: linda at acm.org (linda at acm.org)
Date: Thu, 29 Jan 2004 22:22:52 -0500
Subject: (no subject)
Message-ID: <200401300322.i0U3MoYT002606@mxzilla7.xs4all.nl>

The message cannot be represented in 7-bit ASCII encoding and has been sent as a binary attachment.

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From skip at pobox.com  Sat Jan 31 10:48:17 2004
From: skip at pobox.com (Skip Montanaro)
Date: Sat, 31 Jan 2004 09:48:17 -0600
Subject: timeit
In-Reply-To: <bvfa7b$6jc$1@newsg1.svr.pol.co.uk>
References: <bvfa7b$6jc$1@newsg1.svr.pol.co.uk>
Message-ID: <16411.52801.42668.236157@montanaro.dyndns.org>


    Duncan> This is possibly a stupid question, but I need to get this
    Duncan> working quickly, and I guess I'm just too tired / pressured to
    Duncan> see what I'm doing wrong.  

Import the subtract module in a setup arg to your Timer() constructor:

    tim = timeit.Timer(setup-'import subtract', stmt=s)

Skip



From secchi at sssup.it  Thu Jan 22 05:54:59 2004
From: secchi at sssup.it (Angelo Secchi)
Date: Thu, 22 Jan 2004 11:54:59 +0100
Subject: Importing database: newbie issue
Message-ID: <20040122115459.0da97bfb.secchi@sssup.it>

Hi,
I have a database with a fixed format structure (i.e. i know the
starting point and the length of each of the field composing the
database) and I would like to extract from it only few fields (ex the
one starting from the 32nd position with length 12...).
What is the best way to do that?

Thanks
a



From arsanalytica at yahoo.com  Wed Jan 21 14:45:52 2004
From: arsanalytica at yahoo.com (Dan)
Date: 21 Jan 2004 11:45:52 -0800
Subject: WSDL tools/problems (Salesforce.com)
Message-ID: <8e198b65.0401211145.71d8bc85@posting.google.com>

Salesforce.com has what looks to be a nice SOAP interface (see
http://www.sforce.com) which I would like to access via Python.

I am currently trying to use the newest release of ZSI (1.4.1) to
process our Salesforce WSDL file but have run in to problems (see
below). *Any* suggestions on alternative approaches, or how to get
this approach to work will be appreciated.  Also please note, since I
am new to both Python and ZSI, that this is may be something really
obvious.

Thanks in advance,
Dan

Here is an example:

>>> from ZSI.wstools.WSDLTools import *
>>> w=WSDLReader()
>>> w.loadFromURL('http://gothamanalytics.com/Ex/enterprise.wsdl')

Traceback (most recent call last):
File "C:\Python23\Lib\site-packages\Pythonwin\pywin\framework\scriptutils.py",
line 307, in RunScript
debugger.run(codeObject, __main__.__dict__, start_stepping=0)
File "C:\Python23\Lib\site-packages\Pythonwin\pywin\debugger\__init__.py",
line 60, in run
_GetCurrentDebugger().run(cmd, globals,locals, start_stepping)
File "C:\Python23\Lib\site-packages\Pythonwin\pywin\debugger\debugger.py",
line 592, in run
exec cmd in globals, locals
File "C:\Documents and Settings\Dan\Desktop\Python\sforce.py", line 3,
in ?
w.loadFromURL('http://gothamanalytics.com/Ex/enterprise.wsdl')
File "C:\Python23\Lib\site-packages\ZSI\wstools\WSDLTools.py", line
37, in loadFromURL
wsdl.load(document)
File "C:\Python23\Lib\site-packages\ZSI\wstools\WSDLTools.py", line
195, in load
binding.load(operations)
File "C:\Python23\Lib\site-packages\ZSI\wstools\WSDLTools.py", line
488, in load
mbinding.load_ex(GetExtensions(item))
File "C:\Python23\Lib\site-packages\ZSI\wstools\WSDLTools.py", line
609, in load_ex
ob = SoapBodyBinding(use, namespace, encstyle, parts)
File "C:\Python23\Lib\site-packages\ZSI\wstools\WSDLTools.py", line
780, in __init__
raise WSDLError(
WSDLError: The parts argument must be a sequence.
>>>


From martin at v.loewis.de  Fri Jan  9 18:17:53 2004
From: martin at v.loewis.de (Martin v. Loewis)
Date: Sat, 10 Jan 2004 00:17:53 +0100
Subject: Python And Internationalization maybe a pre-pep?
In-Reply-To: <3ffede43$0$563$b45e6eb0@senator-bedfellow.mit.edu>
References: <3ffede43$0$563$b45e6eb0@senator-bedfellow.mit.edu>
Message-ID: <3FFF36A1.40303@v.loewis.de>

Brian Kelley wrote:

> Essentially, everything looks like this
> _("STRING")
> 
> I got to thinking that this is python, I shouldn't have to do this.  Why 
> not have a mechanism to capture this data at compile time?

Precisely because it is Python you should have to do this. The language
that looks like line noise is a different one...

Explicit is better than implicit.
Simple is better than complex.

> Which is just a subtype of string.  When python parses this it adds it 
> in an entry in the internationalization table.  (essentially a 
> dictionary)  It also addes it as an entry to the standard gettext 
> mechanism to indicate strings that need to be localized.  When the 
> string is created, if a value exists in the international table for the 
> given string, the string is converted to the current locale.

Using what textual domain?

> Now, I don't know if this is a good idea or not, and I may be 
> reinventing some wheels, but it has some appealing characteristics and 
> ties in with the gettext system really well.  Of course, I'm a bit leary 
> with changing the python parser but I was uncomfortable with the two 
> step process of writing the code, then passing it through a source 
> analyzer so that it could be internationalized.

What is your problem with that technique? You have to extract the
strings *anyway*, because the translators should get a list of the
strings to translate, and not need to worry with your source code.

> So, am I being silly, redundant or just plain different?

I do wonder what kind of application are you looking at. How
many strings? How many different translators? How often do
the strings change? Are the strings presented to the immediate
user of the application sitting in front of the terminal where
the application is running, or are there multiple simultaneous
accesses to the same application, e.g. through a Web server?

Regards,
Martin



From cndistin at aol.com  Tue Jan  6 10:22:32 2004
From: cndistin at aol.com (Cndistin)
Date: 06 Jan 2004 15:22:32 GMT
Subject: help needed with class and method confusion
Message-ID: <20040106102232.19889.00002028@mb-m01.aol.com>

First I am sorry for the title but I an newbie enough to now know how to better
word it.

The problem part of my code is
class Application:
    class Moon:
        def __init__(self, name):
            self.name = name
    def __init__(self):
        self.moons = []
        names = ["Io", "Europa", "Ganymeade"]
        for name in names:
            setattr(self, name, Moon(name))
I would like to somehow get self.moons to equal
[self.Io, self.Europa, self.Ganymeade]. I had hoped on using
self.moons as an iterant in "for" loops to be able to alter each
in turn.

Thanks in advance for any possible help.


From jeremy at zope.com  Mon Jan 12 11:39:17 2004
From: jeremy at zope.com (Jeremy Hylton)
Date: Mon, 12 Jan 2004 11:39:17 -0500
Subject: Databases: Which one's right for me?
In-Reply-To: <878ykf71g6.fsf@pobox.com>
References: <4378fa6f.0401091717.1ae63541@posting.google.com>
	<qu7000dot866j3qd9hi6hgkh4np5nuq7fa@4ax.com> <878ykf71g6.fsf@pobox.com>
Message-ID: <1073925556.6341.403.camel@localhost.localdomain>

On Sat, 2004-01-10 at 19:50, John J. Lee wrote:
> Rene Pijlman <reply.in.the.newsgroup at my.address.is.invalid> writes:
> 
> > Marc:
> > >Basically I need a db that will travel with my executable script and
> > >faithfully store and edit the data needed in that script.
> > 
> > Have a look at ZODB.
> > 
> > Introduction:
> > http://www.python.org/workshops/2000-01/proceedings/papers/fulton/zodb3.html
> 
> Which doesn't have a built-in query system, so isn't a database in the
> same way as a relational DB like Postgres or Oracle.  It's more like
> BSDDB + pickle.

A database is a lot more than a query system, although for some
applications query support is very important.  Zope has a custom query
system, called the catalog, that is built on top of ZODB.  Whether ZODB
sans a builtin query system is suitable really depends on the
application.

Jeremy





From kelianichols at ssdd.nrl.navy.mil  Mon Jan  5 15:49:02 2004
From: kelianichols at ssdd.nrl.navy.mil (nuvodido)
Date: Mon, 05 Jan 2004 20:49:02 -0000
Subject: ASCII characters in my hex output
Message-ID: <btciju+mlmk@eGroups.com>

I am using pyserial to work with a device on my serial port.  the 
output is a mixture of ASCII and hex: 

Ex.	'\x10\x00*'


I need conver the \x00* nuber in to decimal.  Is there way to 
convter this value striat forward?


Thanks in advance
Kelia Nichols
______________________________________
No trees were killed in the sending of this message. However a large 
number of electrons were terribly inconvenienced.






From nospam at steve.com  Wed Jan 14 11:21:31 2004
From: nospam at steve.com (Steve)
Date: Thu, 15 Jan 2004 03:21:31 +1100
Subject: Time diff
Message-ID: <40056c83$1@clarion.carno.net.au>

Hi,

I have two time strings:

2004-01-14 19:17:37,  and  2004-01-15 01:45:33

How can I find out the number of minutes/seconds between the two times 
in python? Thanks !!

Steve



From news at badblocks.de  Sat Jan 31 14:19:36 2004
From: news at badblocks.de (Walter Haslbeck)
Date: Sat, 31 Jan 2004 20:19:36 +0100
Subject: problem with weakref.proxy
References: <diose1-fr8.ln1@smell.butthole.homeunix.net>
	<bvgot4$7aj$01$1@news.t-online.com>
	<bvgqcc$q2t$04$1@news.t-online.com>
Message-ID: <8nbte1-iia.ln1@smell.butthole.homeunix.net>

Peter Otten <__peter__ at web.de> wrote:

> If you want to keep your original design, just use ref instead of proxy:

Thanks! Thats what I was looking for!

And: after I posted the original article I tried another method:

I didn't use weakref, but put a real reference of the instance
into __olist and checked in c_show_all with sys.getrefcount()
if the object is referenced by other names. If not, I removed
the object from __olist[].

Well, that worked. But I like the weakref.ref method much more!

Walter


From spam-trap-095 at at-andros.demon.co.uk  Sun Jan  4 10:26:41 2004
From: spam-trap-095 at at-andros.demon.co.uk (Andrew McLean)
Date: Sun, 4 Jan 2004 15:26:41 +0000
Subject: Sending e-mail with python 1.5.2
Message-ID: <fM6PlaqxCD+$EwGQ@at-andros.demon.co.uk>

I am writing a CGI script on an account that only has Python 1.5.2. It's 
principal purpose is to take some user input from a form, do some 
manipulation and return some information to the user. However, I would 
also like it to send some information to an e-mail account (behind the 
scenes).

The e-mail could be quite simple, but I wouldn't rule out wanting to 
send a pickled object or two.

Now if I was using a recent Python I would just use the email package, 
but I don't think it's compatible with v1.5.2. I know I have access to 
the sendmail binary, so something should be possible. Any pointers 
gratefully received.

-- 
Andrew McLean


From xpythonist at yahoo.com.br  Fri Jan 23 10:25:44 2004
From: xpythonist at yahoo.com.br (=?iso-8859-1?q?Aloysio=20Figueiredo?=)
Date: Fri, 23 Jan 2004 12:25:44 -0300 (ART)
Subject: file open problem
In-Reply-To: <20040123143808.80139.qmail@web14702.mail.yahoo.com>
Message-ID: <20040123152544.60161.qmail@web21503.mail.yahoo.com>

 
Are you sure that the file c:\temp\pytest.txt exists
in your laptop's hard disk?



--- Neil MacGaffey <neilmacgaffey at yahoo.com> escreveu:
> Hi  - I'm new to python and am stymied by something
> that should be simple.  The file open command below
> works fine on my desktop machine, but I cant get it
> to
> work on my laptop.  Since using Python on my laptop
> is
> realistically the only way I'm going to find the
> time
> to learn Python, this is a big problem for me. 
> Here's
> what I'm up against:
> 
>  PythonWin 2.3.3 (#51, Dec 18 2003, 20:22:39) [MSC
> v.1200 32 bit (Intel)] on win32.
> Portions Copyright 1994-2001 Mark Hammond
> (mhammond at skippinet.com.au) - see
> 'Help/About PythonWin' for further copyright
> information.
> >>> fobj = open(r'c:\temp\pytest.txt','r')
> Traceback (most recent call last):
>   File "<interactive input>", line 1, in ?
> IOError: [Errno 2] No such file or directory:
> 'c:\\temp\\pytest.txt'
> 
> The laptop is a Sony VIAO that's about 2 years old. 
> Its running Windows 2000, SP4.  The desktop is an
> older machine, but with the same Windows
> environment. 
> I've obtained a fresh download of Python 2.3.3 and
> the
> Win32 extension and have re-installed both a couple
> of
> times with no apparent problems.  I also tried
> dropping back to Python 2.3.2, but had same result. 
> Any ideas as to what I should be looking at on this
> laptop that might be causing the problem?
> 
> Thank you
> Neil
> 
> __________________________________
> Do you Yahoo!?
> Yahoo! SiteBuilder - Free web site building tool.
> Try it!
> http://webhosting.yahoo.com/ps/sb/
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list 

______________________________________________________________________

Yahoo! GeoCities: a maneira mais f?cil de criar seu web site gr?tis!
http://br.geocities.yahoo.com/



From mac-gs-bounces at ghostscript.com  Thu Jan 29 23:37:24 2004
From: mac-gs-bounces at ghostscript.com (mac-gs-bounces at ghostscript.com)
Date: Thu, 29 Jan 2004 20:37:24 -0800
Subject: Your message to mac-gs awaits moderator approval
Message-ID: <mailman.2075.1075437444.1262.mac-gs@ghostscript.com>

Your mail to 'mac-gs' with the subject

    test

Is being held until the list moderator can review it for approval.

The reason it is being held:

    SpamAssassin identified this message as possible spam

Either the message will get posted to the list, or you will receive
notification of the moderator's decision.  If you would like to cancel
this posting, please visit the following URL:

    http://www.ghostscript.com/mailman/confirm/mac-gs/812fd23cd4fae011f66b2bea2cdf585e583184c4




From james at logicalprogression.net  Wed Jan 21 12:42:07 2004
From: james at logicalprogression.net (James Henderson)
Date: Wed, 21 Jan 2004 17:42:07 +0000
Subject: Assignment to slice
In-Reply-To: <20040121170142.55936.qmail@web40104.mail.yahoo.com>
References: <20040121170142.55936.qmail@web40104.mail.yahoo.com>
Message-ID: <200401211742.07507.james@logicalprogression.net>

On Wednesday 21 January 2004 5:01 pm, Rich Krauter wrote:
> I do not understand why python behaves the way it does
> in the following code:
>
> Here, Python doesn't like that I'm assigning
> out-of-range.  OK. That's fine.
>
> >>> x = []
> >>> x[5] = 3
>
> Traceback (most recent call last):
>   File "<interactive input>", line 1, in ?
> IndexError: list assignment index out of range
>
> However, the following seems very strange. Assigning
> to a slice, over non-existent array indexes, sets x[0]
> and x[1].
>
> >>> x[2:5] = [3,4]
> >>> x
>
> [3,4]
>
> >>> x[1000:9000] = [5]
> >>> x
>
> [3, 4, 5]
>
> Why does assigning to a slice of non-existent array
> elements fill in the array, starting with the first
> empty array position? (Acts like [].append() or
> [].extend()?)
>
> Why not raise an out-of-bounds exception here too?
> Wouldn't that be more consistent with the first case,
> in which I tried to assign out-of-range, and got an
> exception?
>
> IMO, at least the first index in the slice should be
> required to exist in the array. If not, raise an
> exception. That way, assigning to the slice fills in
> the array in a predicatable way without having to do
> len() checks first to ensure that you know where in
> the array the slice is actually going to be inserted.
>
> But I'm sure it is the way it is for a good reason.
> Hopefully someone can clue me in.
>
> Thank you in advance.
>
> Rich

This doesn't answer you fully but Python is at least consistent in that 
slicing - as opposed the indexing of your first case - *never* raises an 
IndexError.  It's not unique to assignment.  "print x[1000:9000]" works too.

The fact that slices can extend outside the current range is useful.  
Otherwise you couldn't use them to extend sequences.   Adding to the end 
would still be possible with your proposed restriction on first index., but 
what if you wanted to add stuff to the *start* of the list.  Currently this 
works:

>>> x = [1, 2, 3]
>>> x[-10:-9] = [54]
>>> x
[54, 1, 2, 3]

In this case to be consistent you must insist that the second index exist in 
the array, i.e. insist on:

>>> x[-4:-3] = [54]

James
-- 
James Henderson, Logical Progression Ltd.
http://www.logicalprogression.net/
http://sourceforge.net/projects/mailmanager/




From Tobias.Windeln at gmx.de  Fri Jan  9 08:37:54 2004
From: Tobias.Windeln at gmx.de (Tobias Windeln)
Date: Fri, 09 Jan 2004 14:37:54 +0100
Subject: Object-based inheritance in Python
In-Reply-To: <yfszncxuy0y.fsf@black132.ex.ac.uk>
References: <btm3u5$13so$1@f1node01.rhrz.uni-bonn.de>
	<yfszncxuy0y.fsf@black132.ex.ac.uk>
Message-ID: <btmari$tkc$1@f1node01.rhrz.uni-bonn.de>

Alexander Schmolck wrote:

> Tobias Windeln <Tobias.Windeln at gmx.de> writes:
> 
> 
>>Maybe there is a way to hand over self to the delegatee object.
> 
> [...]
> 
> 
>>class Child:
>>     def __init__(self, delegatee):
>>         self.__dict__['delegatee'] = delegatee
> 
> 
> Can't you just use this pattern:
> 
>            self.__dict__['delegatee'] = delegatee(self)

This results in:
AttributeError: Delegatee instance has no __call__ method


Here is the solution by Hans Nowaks 
(http://zephyrfalcon.org/download/selfish-0.4.2.zip):

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

import new
import types

__version__ = "0.4.2"
__author__ = "Hans Nowak"
__license__ = "python"
__cvsid__ = "$Id: selfish_v2.py,v 1.3 2003/09/22 04:30:50 hansn Exp $"

def rebind(method, obj):
     return new.instancemethod(method.im_func, obj, obj.__class__)

class SelfObject:

     def __init__(self):
         pass

     def __setattr__(self, name, value):
         if name.endswith("_p"):
             assert isinstance(value, SelfObject), \
                    "Only SelfObjects can be used for inheritance"
         if isinstance(value, types.FunctionType):
             m = new.instancemethod(value, self, self.__class__)
             self.__dict__[name] = m
         elif isinstance(value, types.UnboundMethodType):
             self.__dict__[name] = rebind(value, self)
         elif isinstance(value, types.MethodType):
             self.__dict__[name] = rebind(value, self)
         else:
             self.__dict__[name] = value

     def __getattr__(self, name):
         if name in self.__dict__.keys():
             # seems superfluous; if the attribute exists, __getattr__
             # isn't called
             return self.__dict__[name]
         else:
             # scan "ancestors" for this name...
             # left-right based on name, depth first
             items = self.__dict__.items()
             items.sort()
             for attrname, obj in items:
                 if attrname.endswith("_p"):
                     try:
                         z = obj.__getattr__(name)
                     except AttributeError:
                         pass
                     else:
                         if isinstance(z, types.MethodType):
                             z = rebind(z, self)
                         return z
             raise AttributeError, name

Object = SelfObject()



From guettli at thomas-guettler.de  Tue Jan  6 03:17:33 2004
From: guettli at thomas-guettler.de (Thomas Guettler)
Date: Tue, 06 Jan 2004 09:17:33 +0100
Subject: tuple.__hash__()
Message-ID: <pan.2004.01.06.08.17.30.910345@thomas-guettler.de>

Hi!

Can someone point me to the documentation
of tuples __hash__ method?

I want to unique a list of tuples. Since
__hash__ returns a 32 bit integer, there
could be a situtation where two different tupples
return the same value.

>>> t1=(1, 2, 3)
>>> t1.__hash__()
-821448277
>>> t2=(1, 2, 3)
>>> t2.__hash__()
-821448277

Is there a dictionary type which uses __cmp__() like
btrees in the standard library?

 thomas


From swalters_usenet at yahoo.com  Fri Jan  9 16:02:38 2004
From: swalters_usenet at yahoo.com (Samuel Walters)
Date: Fri, 09 Jan 2004 21:02:38 GMT
Subject: displaying extended ASCII from a telnet session
References: <mailman.229.1073667874.12720.python-list@python.org>
Message-ID: <pan.2004.01.09.21.01.15.352927@yahoo.com>

|Thus Spake Christian Wilcox On the now historical date of Fri, 09 Jan
2004 11:04:27 -0600|

> I'm trying to programmatically access information from a telnet session
> which is normally accessed with a telnet program capable of terminal
> emulation (currently set at VT320).  The initial login text displays
> fine, of course, but when I get to the section which displays extended
> ASCII characters, Telnet from telnetlib displays the following garbled
> mess:

<snip>
> Any ideas of a way to decode this information?

Tell us a bit more detail on your problem, such as what program/system are
you trying to get to access what program/system.

Unless you correct me, I'll assume that you're trying to get a python
program that may or may not be on a linux/unix computer to access a telnet
resource that you normally use a vt320 emulator to access.

The information you seek has to do with termcap, termio and (tangently)
curses.  Each terminal defines a set of codes and capabilities using a
termcap file (on *nix, at least.)  Those capabilities are stored in the
termcap database.  Your terminal program is not properly decoding these
codes and control sequences.  Specifically, the codes like ?[?40h are
control sequences.  and the long lines of q's are where the server
told the terminal to use line-drawing characters rather than normal
characters.  You, of course, only see q's because you aren't decoding the
stream.

Read up on the matter here:
http://www.gnu.org/software/termutils/manual/termcap-1.3/html_chapter/termcap_4.html#SEC23
and here:
http://www.gnu.org/software/termutils/manual/termcap-1.3/html_chapter/termcap_toc.html

But don't necessarily try to get a deep understanding of each element. 
Just try to get an overview so that you have a grasp on the issues
involved.  There are probably better manuals on this stuff, but these are
the definitive manuals.

Once you've done that and told us more about your problem, we'll be able
to have a much more informative discussion of how to resolve this issue.

HTH

Sam Walters.


-- 
Never forget the halloween documents.
http://www.opensource.org/halloween/
""" Where will Microsoft try to drag you today?
    Do you really want to go there?"""



From pln at cosmic.stanford.edu  Wed Jan 14 18:28:21 2004
From: pln at cosmic.stanford.edu (Patrick L. Nolan)
Date: Wed, 14 Jan 2004 23:28:21 +0000 (UTC)
Subject: Tkinter: disable menu items while running
Message-ID: <bu4jal$f0t$1@news.Stanford.EDU>

We have a Tkinter application which has a menubar with cascade
submenus.  I would like to start the program with one of the
submenu items state=DISABLED, then change it to state=NORMAL
at a later time.  I hope I just missed something obvious, 
because I can't figure out how to change its state.

The problem comes about because the menu bar is built by several
add_cascade() calls.  Each of the cascades, in turn, has
several add_command() calls.  If the cascade in question was,
say, an object named Cas, then I could call Cas.entryconfigure().
However, I don't know how to get ahold of the objects
created by add_cascade() or add_command().  Do they live
somewhere accessible?

-- 
*   Patrick L. Nolan                                          *
*   W. W. Hansen Experimental Physics Laboratory (HEPL)       * 
*   Stanford University                                       *


From harry.g.george at boeing.com  Thu Jan 15 08:40:44 2004
From: harry.g.george at boeing.com (Harry George)
Date: Thu, 15 Jan 2004 13:40:44 GMT
Subject: keeping Python code properly indented
References: <3064b51d.0401151125.711ade4c@posting.google.com>
Message-ID: <xqx7jztpbxf.fsf@cola2.ca.boeing.com>

beliavsky at aol.com writes:

> How do you keep Python code properly indented as you modify it? I use
> an Emacs-type editor that has a Python mode, so the initial indenting
> is easy. If I later want to put a 'for' loop (or an 'if' statement)
> around a bunch of code, I find myself going through the body of the
> loop, manually re-indenting to keep the nested loops correct. There
> should be a better way.
> 
> I think that having a 'for' loop end with a matching 'next' statement,
> as done in (for example) Basic, is a safer and clearer way of writing
> loops, although some Python programmers consider this a 'feature'
> rather than a 'bug'.

You do not need to "go through the body, manually re-indenting".  In
emacs, block select everything to be indented and then do the right
shift in one step.  That action is in the python-mode.el's added menu,
and it is available as keystrokes ("C-c >" by default).  Similarly for
undenting.

Is there a safety concern which requires solution through closure
markers?  It is a potential problem, but isn't worth closure markers
in the language.  The main solution is to not let indenting get out of
whack in the first place:

a) Have a rigorous newbie setup process to assure the editor does
4-char hard spaces (no tab chars), and understands python-mode
indenting.   See: http://www.python.org/peps/pep-0008.html

b) During development, run unittest-based regression tests every
minute or so.  A messed-up indent will either fail to compile or will
fail a test.  This enforces the indents and that becomes valued a
language feature when doing code reviews.

c) Immediately fix indents if problems are detected.

d) Keep the code under revision control, so older (known good) code
can be recovered.

(If you can't assure a-d, then there are bigger problems than language
features.)

Finally, if you really think you need closure markers, 
do so with comments instead of language changes:

    if x > y:
      z=0
    #end if

You will still be forced to get the indenting right, but at least you
will have clues for recovering mangled indenting.

-- 
harry.g.george at boeing.com
6-6M31 Knowledge Management
Phone: (425) 342-5601


From adolfo at linuxmail.org  Mon Jan 26 17:41:31 2004
From: adolfo at linuxmail.org (Adolfo)
Date: 26 Jan 2004 14:41:31 -0800
Subject: Free Python Class Online !
Message-ID: <91de052a.0401261441.28fec693@posting.google.com>

Hi, I just found out about a free Python class online 

You can register here:

               http://www.icanprogram.com/registration_python.html

And join the class mailing list here:

                ican05py-subscribe at yahoogroups.com



Adolfo
Santa Barbara, CA


From crap at crud.com  Fri Jan 23 23:23:40 2004
From: crap at crud.com (Moosebumps)
Date: Sat, 24 Jan 2004 04:23:40 GMT
Subject: Batch commands on Windows
References: <7A3Qb.4870$AK2.3953@newssvr29.news.prodigy.com>
	<mailman.689.1074867434.12720.python-list@python.org>
Message-ID: <grmQb.15157$yd7.13778@newssvr27.news.prodigy.com>

> Can you give an example of what you mean, in Perl as well as what you
hoped
> would work in Python? I couldn't quite understand what it is that you're
trying
> to do.

OK, actually on second test, the problem is mostly with IDLE, but not
totally.  When I hit F5 under IDLE, it behaves differently with respect to
the command window then if I just run it by double-clicking on the file.

Here is an example:

BatchTest.bat:

set MYVAR=3
dir
pause
dir
echo %MYVAR%
pause

BatchTest.py:

# the intention is to do the same thing as BatchTest.bat, but it doesn't
work under either IDLE or by double-clicking
# in particular the environment variable is not saved, and it doesn't work
if I replace os.system with os.popen

import os

os.system("set MYVAR=3")
os.system("dir")
os.system("pause")
os.system("dir")
os.system("echo %MYVAR%")
os.system("pause")

BatchTest.pl:

# this actually does the same thing as Python, I was mistaken.  I was
mislead by the IDLE behavior.

system('set MYVAR=3');
system('dir');
system('pause');
system('dir');
system('echo %MYVAR%');
system('pause');

The general idea is that it would be nice if there weren't any differences
between the batch file and python.  From a practical standpoint, it would
encourage a lot of people to switch from nasty batch files to Python scripts
if you could just surround the entire thing with os.batch(' ') or some
similar sort of mechanical textual substitution.  Then you could clean it up
gradually.

I am aware of os.environ and such, and that is useful, but it's not really
the point.

Of course I could write a function to take a bunch of strings, write a batch
file, save the working directory, execute it, restore the current directory,
then delete the batch file, but that seems like an awful hack.  Though I
probably will do that at some point.

> > What's the deal with that?  I thought Python started out as a scripting
> > language.  And that seems like the most basic thing that a scripting
> > language should do.
>
> Dunno, although MS-DOS shell scripting is certainly a small subset of
scripting
> in general. Maybe with a concrete example somebody will be able to give
you a
> hand.

It is a small subset, but an important subset.  Shell scripting started
probably when people got sick of typing the same commands into the prompt.
For a language to really support shell scripting, it should provide a way of
automating the process of typing in the commands.  As in, there should be no
difference whether you're actually typing, or you're running the script.

If there is a way and I don't know about it, I would be happy to hear about
it.  But I do think it is a pretty big hole.

MB




From mbabcock at fibrespeed.net  Fri Jan  9 13:35:08 2004
From: mbabcock at fibrespeed.net (Michael T. Babcock)
Date: Fri, 09 Jan 2004 13:35:08 -0500
Subject: displaying extended ASCII from a telnet session
In-Reply-To: <E1Af0rk-0004e9-3W@mail.python.org>
References: <E1Af0rk-0004e9-3W@mail.python.org>
Message-ID: <3FFEF45C.3060607@fibrespeed.net>

>
>
>Controls?[39C?(0?x?[15;5Hx?[68Cx?[16;5Hmqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq
>x?(B??[60CChoice:s?[56C?(0?x?[1D?[1B(0?x?[1D?[1B                              ?[5C?(0?x?[1D?[1B
>
>Any ideas of a way to decode this information?
>  
>

Terse answer: Read up on VT100 emulation.

-- 
Michael T. Babcock
C.T.O., FibreSpeed Ltd.
http://www.fibrespeed.net/~mbabcock





From pythongnome at hotmail.com  Fri Jan 23 08:13:27 2004
From: pythongnome at hotmail.com (Lucas Raab)
Date: Fri, 23 Jan 2004 13:13:27 GMT
Subject: C compilers
Message-ID: <X59Qb.20838$q4.11416@newsread3.news.atl.earthlink.net>

I realize that this is a Python newsgroup, but do any of you know any good
C/C++ compilers?? I'm interested in imbedding C with Python.

Thanks




From mersmann at szut.uni-bremen.de  Sat Jan  3 11:32:07 2004
From: mersmann at szut.uni-bremen.de (Frank)
Date: 3 Jan 2004 08:32:07 -0800
Subject: Integer math question
Message-ID: <3987e01c.0401030832.114c6f2a@posting.google.com>

Hi,

can anybody help with the following problem?

In C++

i = 5 / 10 	and
i = -5 / 10 	both have the same result 0.

In python

i = 5 / 10 	gives me 0 as expected, but
i = -5 / 10 	gives -1 as result.

Is this a feature or a bug? I remember Delphi gave me the same result as
C++.

TIA,
Frank


From __peter__ at web.de  Tue Jan 13 14:18:54 2004
From: __peter__ at web.de (Peter Otten)
Date: Tue, 13 Jan 2004 20:18:54 +0100
Subject: Make a function call itself after set amount of time
References: <bu0v1v$qio$1@solaris.cc.vt.edu> <bu106b$s16$1@solaris.cc.vt.edu>
Message-ID: <bu1g42$1bg$07$1@news.t-online.com>

Bart Nessux wrote:

> Bart Nessux wrote:
>> How do I make a function call itself every 24 hours. Also, is there a
>> way to start the program automatically w/o depending on the OS functions
>> like 'Task Scheduler' or 'Start Up Items'... this is on Windows 2k and
>> xp. Below is an example of what I'm trying to do.

[...]

> I figured it out. I added this to the function definition:
> ipconfig_email()

Note that Python has a limit for nesting functions:

>>> depth = 0
>>> def callself():
...     global depth
...     depth += 1
...     callself()
...
>>> try:
...     callself()
... except RuntimeError, e:
...     print "depth", depth
...     print e
...
depth 999
maximum recursion depth exceeded

>>> 999/365.25
2.7351129363449691

This means that your app will probably crash in less than three years.
Would that be a problem on W2K ?

If so, a loop could go much longer:

while True:
    ipconfig_email()

Seriously, you should reconsider the OS features.

Peter




From martin at v.loewis.de  Fri Jan  9 18:27:26 2004
From: martin at v.loewis.de (Martin v. Loewis)
Date: Sat, 10 Jan 2004 00:27:26 +0100
Subject: LC_MONETARY formatting
In-Reply-To: <pan.2004.01.09.22.19.04.935366@cfconsulting.ca>
References: <pan.2004.01.09.22.19.04.935366@cfconsulting.ca>
Message-ID: <3FFF38DE.1050603@v.loewis.de>

Colin Fox wrote:

> So I have:
> 
> cash = 12345.6
> 
> and the locale is set to "en_CA" (though that doesn't matter, really).
> 
> I would like to be able to print "$12,345.60"
> 
> Is there a format string, or function, or *something* that will take
> advantage of the monetary formatting info in the locale object? 

No.

> Or did
> they provide all that formatting information just so that I have to write
> it myself?

Yes. Use locale.localeconv() to find the relevant parameters.

Make sure you understand that using 'currency_symbol' presents a problem
if the amount you have is already in some currency. Printing the same
value in different locales using the na?ve formatting algorithm is
likely to produce incorrect results, as you have to apply some exchange
rate, which varies from day to day, and from trading place to trading
place.

IOW, LC_MONETARY is useless for financial applications - if the amount
is in ?, using the locale's currency symbol would be wrong.

Regards,
Martin



From andrew-pythonlist at puzzling.org  Sat Jan 31 20:35:15 2004
From: andrew-pythonlist at puzzling.org (Andrew Bennetts)
Date: Sun, 1 Feb 2004 12:35:15 +1100
Subject: Python vs. Io
In-Reply-To: <20040131203802.GA1664@intarweb.us>
References: <711c7390.0401291301.3f95794@posting.google.com>
	<qnkfzdyieg0.fsf@arbutus.physics.mcmaster.ca>
	<711c7390.0401301710.4353274@posting.google.com>
	<bvf6kc$2v$2@news.service.uci.edu>
	<711c7390.0401311220.763be80a@posting.google.com>
	<20040131203802.GA1664@intarweb.us>
Message-ID: <20040201013515.GA19909@frobozz>

On Sat, Jan 31, 2004 at 03:38:02PM -0500, Jp Calderone wrote:
> On Sat, Jan 31, 2004 at 12:20:52PM -0800, Daniel Ehrenberg wrote:
> > 
> > What are you talking about? There's tons of new "magical syntax" in
> > Python. Examples for "magical syntax" features that don't work on
> > 1.5.2 include:
[...]
> 
> > * * and ** in function declarations
> 
>   Yep.

* and ** in function _calls_ is new in 2.0, but in declarations was already
there in 1.5.2:

bash-2.05b$ python1.5
Python 1.5.2 (#0, Jul  5 2003, 11:45:08)  [GCC 3.3.1 20030626 (Debian prerelease)] on linux2
Copyright 1991-1995 Stichting Mathematisch Centrum, Amsterdam
>>> def f(*args, **kwargs):
...     print args, kwargs
... 
>>> f('a', 'b', 'c', x=1, y=2, z=3)
('a', 'b', 'c') {'z': 3, 'x': 1, 'y': 2}
>>> 

-Andrew.




From martin at v.loewis.de  Sat Jan  3 07:09:48 2004
From: martin at v.loewis.de (Martin v. Loewis)
Date: Sat, 03 Jan 2004 13:09:48 +0100
Subject: Creating a capabilities-based restricted execution system
In-Reply-To: <MGudndQhy9ieEmuiXTWc-w@speakeasy.net>
References: <LmmdnUn4seDeGWuiXTWc-w@speakeasy.net>
	<7xznd58klr.fsf@ruckus.brouhaha.com>
	<MGudndQhy9ieEmuiXTWc-w@speakeasy.net>
Message-ID: <bt6bec$25j$06$1@news.t-online.com>

Sean R. Lynch wrote:
> If you know of a location where the known shortcomings of rexec are 
> documented, please let me know. So far I've only seen a couple examples 
> and a lot of people saying "it's not secure so let's disable it."

The biggest problem is that new-style classes are both available through
the type() builtin, and callable to create new instances.

For example, if you have managed to open a file object f, then

type(f)("/etc/passwd").read()

lets you access a different file, bypassing all machinery that may
have been designed to prevent that from happening.

Of course, for the specific case of file objects, there is additional
machinery preventing that from happening, but in the general case,
there might be more problems in that area. For example, 
object.__subclasses__() gives you access to quite a lot of stuff.

Regards,
Martin



From __peter__ at web.de  Wed Jan 28 08:35:01 2004
From: __peter__ at web.de (Peter Otten)
Date: Wed, 28 Jan 2004 14:35:01 +0100
Subject: Tcl style traces
References: <40171be5$0$1742$5a62ac22@freenews.iinet.net.au>
Message-ID: <bv8dlb$i24$02$1@news.t-online.com>

Derek Fountain wrote:

> Does Python have something similar to Tcl style tracing? That is, the
> ability to call a subroutine when a variable is written to or read from?

Would it be sufficient to keep track of attribute changes? Then you could
try something like

class TraceChanges(object):
    def __init__(self, name, onChange):
        # bypass the tracking mechanism
        object.__setattr__(self, "name", name)
        object.__setattr__(self, "changed", onChange)

    def __setattr__(self, name, value):
        object.__setattr__(self, name, value)
        self.changed(self, name, value)


def changed(sender, name, value):
    # could also be a method of TraceChanges
    print "%s.%s changed to %s --> updating canvas" % (sender.name, name,
value)


rectangle = TraceChanges("rectangle", changed)
rectangle.color = "blue"

text = TraceChanges("text", changed)
text.color = "red"
text.font = "Helvetica"

Peter


From jcarlson at uci.edu  Mon Jan 19 21:43:14 2004
From: jcarlson at uci.edu (Josiah Carlson)
Date: Mon, 19 Jan 2004 18:43:14 -0800
Subject: stack-like file object
References: <400be8f3_2@nova.entelchile.net>
Message-ID: <20040119183719.ABC4.JCARLSON@uci.edu>

Rodrigo,

> I need to implement a stack on a file.
> The idea is to have a big list, and put part of his head on the disk. The
> model of access to the file is like a stack (read in order only the tail,
> write only at the tail).
> How could I create this, knowing that I need to pickle arbritary objects ?

While I don't condone the use of files as stacks, the below should work
for you.  It doesn't reduce in size when an object is removed, but as
long as you don't try to share the stack between processes or threads,
it should work fine.

 - Josiah

import cPickle
import struct
import os

class filestack:
    def __init__(self, filename):
        try:    os.remove(filename)
        except: pass
        self.fn = filename
        self.f = open(filename, 'wb+')
        self.s = len(struct.pack('!i', 0))

    def __del__(self):
        self.f.close()
        del self.f
        os.remove(self.fn)

    def append(self, data):
        st = cPickle.dumps(data)
        self.write(st)
        self.write(struct.pack('!i', len(st)))

    def pop(self):
        posn = self.f.tell()
        if posn <= 0:
            raise IndexError
        self.f.seek(posn-self.s)
        s = struct.unpack('!i', self.f.read(self.s))
        self.f.seek(posn-self.s-s)
        ret = cPickle.loads(self.f.read(s))
        self.f.seek(posn-self.s-s)
        return ret




From jerf at jerf.org  Sat Jan 17 22:27:41 2004
From: jerf at jerf.org (Jeremy Bowers)
Date: Sun, 18 Jan 2004 03:27:41 GMT
Subject: Inserting while itterating
References: <pan.2004.01.14.08.43.00.894047@thomas-guettler.de>
Message-ID: <pan.2004.01.17.22.30.26.454869@jerf.org>

On Wed, 14 Jan 2004 09:43:01 +0100, Thomas Guettler wrote:

> Hi,
> 
> Simple excerise:
> 
> You have a sorted list of integers:
> l=[1, 2, 4, 7, 8, 12]
> 
> and you should fill all gaps:
> 
> result == [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]
> 
> How would you code this?
> 
> Constrain: The original list should be changed,
> don't create a copy.
> 
>   thomas

l[:] = [x for x in range(l[0], l[-1] + 1)]

If you care about timing, you'll want to compare against Peter Abel's
solution; I would not guarantee which is faster. All I can tell you is
which makes more sense to me when I read it.

Actually, maximal readability is

l[:] = [x for x in range(min(l), max(l) + 1)]

but that will *certainly* be less efficient if you know the list is sorted
then my first post.


From josecarlos at siadv.com  Fri Jan 23 07:50:00 2004
From: josecarlos at siadv.com (José Carlos)
Date: Fri, 23 Jan 2004 13:50:00 +0100
Subject: Server and Client Socket problem
Message-ID: <bur59q$kel$1@nsnmrro2-gest.nuria.telefonica-data.net>

Hi.

I am starting a server socket program. I send data from client socket but
the server don?t recived anything.

This is my python code:

Server:

import socket
        def run():
servidor = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
servidor.bind(('localhost', 6969))
servidor.listen(1)
while 1:
 (conexion, direccion) = servidor.accept()
datos = conexion.recv(4069)
 print "Servidor Recibe", datos
                if datos == "quit":
                    servidor.close()
                break

        run()


Client:

 import socket
        def run():
cliente = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
 cliente.connect(('localhost', 6969))
  except:
                   print "No he podido Conectar con el Servidor"
            return
            datos = '12345678'
cliente.send(datos)
          #cliente.close()

        run()


I am a new python user. what can i do?

Thank you.

Regards.
Jos? Carlos




From sinzcere at hotmail.com  Mon Jan  5 19:10:21 2004
From: sinzcere at hotmail.com (J)
Date: 5 Jan 2004 16:10:21 -0800
Subject: Quck question
Message-ID: <3125790e.0401051610.5e24de28@posting.google.com>

I have the following information in a file :
r1kcch    Serial0/0/0    propPointToPointSerial
Mon Jan 5 13:15:03 PST 2004 InOctets.1    0
Mon Jan 5 13:15:05 PST 2004 OutOctets.1   0

I want to be able to extract each line into a comma delimited list. 
Bellow i am trying to print out my list print currentList but nothing
is comming out.  I added a line after print test to make sure the file
has the information.  Can someone help me with this?


#Read a file
true = 1
in_file = open("test.txt","r")
text = in_file.read()
while true:
    in_line = in_file.readline()
    if in_line == "":
        break
    currentList = string.split(in_line,",")
    #print out the contents of the current list
    print currentList 
    #make the inline stop reading
    in_line = in_line[:-1]
in_file.close()


From wcitoan at NOSPAM-yahoo.com  Wed Jan 14 18:44:43 2004
From: wcitoan at NOSPAM-yahoo.com (W. Citoan)
Date: Wed, 14 Jan 2004 23:44:43 -0000
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<n22Nb.11299$9k7.210522@news.xtra.co.nz>
	<bu2pgs$d123a$1@ID-207230.news.uni-berlin.de>
	<4004EC9E.1E2E2893@alcyone.com> <bu3iv2$n2u$4@tyfon.itea.ntnu.no>
Message-ID: <slrnc0bl3a.qk.wcitoan@wcitoan-via.supernews.com>

["Followup-To:" header set to comp.games.development.programming.misc.]
On Wed, 14 Jan 2004 14:16:02 +0000 (UTC), Bent C Dalager wrote:
> 
>  It is, never the less, worth pointing out. It would seem that Brandon
>  entered the scene with an idea that OSS developers might be incredibly
                                       ^^^^^^^^^^^^^^
>  useful to him for some reason or other. Other game developers might
>  very well have the same idea. When Brandon finds out that this is not
>  the case and describes in some detail why OSS won't do the job for
                                             ^^^
>  him, than this can certainly be useful for other game developers to
>  learn so that don't have to spend 6 months figuring out the exact same
>  thing themselves.
> 
>  The conclusion may seem obvious to _you_ but this is no guarantee that
>  everyone else also possesses this knowledge. OSS is being hailed as
                                                ^^^
>  the second coming, and it comes as no surprise therefore that some
>  people might be deluded into thinking they could harness this power to
>  cure cancer overnight or land a man on Mars by 2005.

OSS developers != OSS

While "OSS is being hailed as the second coming", nobody is claiming
that people you aren't paying are going to do what you want, when you
want, and how you want.  That was Brandon's complaint.

People develop OSS for their own reasons (personal or corporate).  They
don't do it to provide free labor for the asking.  Anyone who doesn't
see that as obvious is severely lacking in common sense.

- W. Citoan
-- 
A bore is someone who persists in holding his own views after we have
enlightened him with ours.


From __peter__ at web.de  Thu Jan  8 08:12:20 2004
From: __peter__ at web.de (Peter Otten)
Date: Thu, 08 Jan 2004 14:12:20 +0100
Subject: Chaning self?
References: <4f0a9fdb.0401080457.3d60adb5@posting.google.com>
Message-ID: <btjko2$rhr$02$2@news.t-online.com>

Subclassing won't work here, because the long type is immutable :-(

Peter




From peter at engcorp.com  Tue Jan 27 17:12:07 2004
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 27 Jan 2004 17:12:07 -0500
Subject: makeExe.py
References: <mailman.853.1075211290.12720.python-list@python.org>
Message-ID: <4016E237.97F88A36@engcorp.com>

Premshree Pillai wrote:
> 
> Peter wrote:
> > if you're interested
> > in integrating the
> > changes, and maintaining it, I'll forward our own
> > script which you can
> > pull apart and reuse as required...
> 
> I'd be interested in that.

Attached below.  Use for any purpose, no warranty. :-)

(The "batchutil" at the end stuff is not really necessary, but is 
handy for us to put Python code inside ".bat" files without having
to hardcode the actual path anywhere.  Basically it finds the .bat
file wherever it is in the path and executes it as a Python file.
I should probably post that sometime too....)

-Peter

------------------start of py2exe.bat-------------------
@goto dos

# setup.py
from distutils.core import setup
import py2exe
import sys
import os
import getopt
from StringIO import StringIO

def usage():
    print 'Usage: py2exe [-i path] mainmodule.py'
    sys.exit(0)


if __name__ == '__main__':
    opts, args = getopt.getopt(sys.argv[1:], 'h?qi:')

    quiet = False
    for opt,val in opts:
        if opt in ['-?', '-h']:
            usage()

        elif opt in ['-q']:
            quiet = True

        elif opt in ['-i']:
            abspath = os.path.normpath(os.path.abspath(val))
            if abspath not in sys.path:
                if not quiet:
                    print 'Appending to sys.path: %s' % abspath
                sys.path.append(abspath)

    if len(args) != 1:
        usage()

    mainScript = args[0]
    if mainScript.endswith('.py'):
        # get part before the .py
        baseName = os.path.splitext(mainScript)[0]

        # fake command line arguments
        sys.argv[1:] = ['py2exe']

        # install redirector for output
        if quiet:
            print 'Running...'

            sys.stdout = StringIO()
            sys.stderr = StringIO()

        try:
            result = setup(
                name=baseName,
                scripts=[mainScript]
                )

        finally:
            sys.stdout = sys.__stdout__
            sys.stderr = sys.__stderr__

        # quick hack which I hope checks that the run succeeded, at least partially
        # result should be an instance of distutils.dist.Distribution which has a have_run attribute
        if hasattr(result, 'have_run'):
            print '\nDone.  Look in dist/%s folder for the executable(s).' % baseName

    else:
        usage()



'''
:dos
@echo off
set argv=%0
:getargs
set argv=%argv% %1
shift
if not %1.==. goto getargs
call python -c "import batchutil; batchutil.runme()" %argv%
rem '''
---------------end of file-----------------------------------


From eddie at holyrood.ed.ac.uk  Mon Jan 19 12:51:24 2004
From: eddie at holyrood.ed.ac.uk (Eddie Corns)
Date: Mon, 19 Jan 2004 17:51:24 +0000 (UTC)
Subject: best book: aint no such thing, and encouragement for old coots
References: <mailman.409.1074191840.12720.python-list@python.org>
	<bu8j31$s4c$1@scotsman.ed.ac.uk>
	<pan.2004.01.16.11.58.58.634101@yahoo.com>
	<m3vfn86vwn.fsf@pc150.maths.bris.ac.uk>
	<d3c9c04.0401190851.5a2f006b@posting.google.com>
Message-ID: <buh5es$hhc$1@scotsman.ed.ac.uk>

cartermark46 at ukmail.com (Mark Carter) writes:

>I'm experimenting with learning a functional language; and I know
>almost zero about Scheme. I find it very difficult to understand the
>structure of what's going on. I downloaded Standard ML (the New Jersey
>offering), and find myself more inclined to dig into ML deeper; rather
>than Scheme. ML does, at first glance, seem more readable.

It's probably a lot more important to stretch yourself out in that direction
than to worry about which flavour.

>I suppose that Schemers and Lispers take the attitude that a lack of
>syntax is an advantage, because you can ultimately program in any
>paradigm you wish. It's "just" a case of writing code that implements
>the paradigm. I have also heard claims that the existence of
>parantheses in s-exprs is a red herring as far as readability is
>concerned.

The supposed unreadability is a complete nonsense, you quickly don't notice
the parentheses and rely mostly on the indentation.  I think I'll start
looking for another project I can do in Scheme, it's been ages.

>Non Schemers/Lispers, on the other hand, presumably think that a
>spoonful of syntactic sugar helps the medicine go down.

>I suspect that if there really was One Obviously Right Way To Do It,
>then we'd all be using it. No silver bullet, and all that.

>I am sure, though, that there will be many people who disagree with my
>sentiments.

Who cares eh?  The important thing is to get the message through to the few
who can think for themselves and give them a chance to rise above the
mediocrity.

Somehow I'm reminded of a sequence in a novel I was reading at the weekend:

Q:"Do you exercise?"
A:"Only restraint!"



From eddie at holyrood.ed.ac.uk  Tue Jan 20 12:07:25 2004
From: eddie at holyrood.ed.ac.uk (Eddie Corns)
Date: Tue, 20 Jan 2004 17:07:25 +0000 (UTC)
Subject: New to Python: my impression v. Perl/Ruby
References: <mailman.493.1074484056.12720.python-list@python.org>
	<87ad4kxees.fsf@pobox.com>
	<mailman.524.1074550958.12720.python-list@python.org>
Message-ID: <bujn8d$o32$1@scotsman.ed.ac.uk>

Wayne Folta <wfolta at netmail.to> writes:

>Intellectually, I prefer Ruby. Ruby and Smalltalk intrigue me. But the 
>"pure OO" approach (my words this time) is annoying, and even at some 
>point inconsistent, as I mentioned in my paragraph about 0.step(). I 
>feel like Python has got the right balance where it's OO and pretty 
>much fully so, but not fanatically so. And it's what I've adopted.

Python: because everything's not an object

?




From jzgoda at gazeta.usun.pl  Fri Jan 16 18:41:56 2004
From: jzgoda at gazeta.usun.pl (Jarek Zgoda)
Date: Fri, 16 Jan 2004 23:41:56 +0000 (UTC)
Subject: RDFLib site down?
Message-ID: <bu9ss3$htc$1@atlantis.news.tpi.pl>

Is here somebody that could confirm how long rdflib.net site is down
(OK, "unavailable")? Should I try to find somebody with working version
of RDFLib, or is it only temporary problem?

-- 
Jarek Zgoda
Unregistered Linux User #-1
http://www.zgoda.biz/ JID:zgoda-a-chrome.pl http://zgoda.jogger.pl/


From amk at amk.ca  Wed Jan 21 07:47:10 2004
From: amk at amk.ca (A.M. Kuchling)
Date: Wed, 21 Jan 2004 06:47:10 -0600
Subject: Pyrex without Python (was Re: calling Pyrex results from C)
References: <20040121005749.GA27424@unpythonic.net>
	<400DD5DE.90405@prescod.net>
	<mailman.567.1074654944.12720.python-list@python.org>
Message-ID: <j46dnXzUvaFT6ZPdRVn-hg@speakeasy.net>

On Tue, 20 Jan 2004 22:15:18 -0500, 
	Fran?ois Pinard <pinard at iro.umontreal.ca> wrote:
> Maybe the fact that one can build and debug prototypes in Python, with
> the agenda of later transforming them into C, somehow, without rewriting
> so much of them, for environments where the whole of Python, for various
> reasons, is not welcome.

At work I've done a much simpler version of this.  We produce code for
mathematical algorithms or state machines that runs inside the Linux kernel;
code can be written either in C or in a tiny subset of Python (basically,
assignments, if...elif...else and for loops -- I forget if 'while' is
implemented or not). Instead of using Pyrex, I just use the compiler
package to get an AST for a chunk of Python code, and then have a code
generator that walks over the AST and produces C code.  

The nice thing is that the code generator knows the C-level types of
variables, so if a and b are arrays, a = a + b generates a 'for' loop in the
C code.  

In theory you could test them in Python, too, letting you debug problems
before having to compile C code and insert it into the kernel.  A long-term
pipe dream is to look at code and figure out which cases to test; for
example, if x is an input parameter and you have the statement 'if 0<x<5:
...', you should probably test with x=0, 1, 4, 5 to be sure all the edge
cases are correct.  

--amk


From timr at probo.com  Thu Jan  1 19:31:10 2004
From: timr at probo.com (Tim Roberts)
Date: Thu, 01 Jan 2004 16:31:10 -0800
Subject: PYTHONPATH unnecessary with PythonWin?
References: <gpGIb.14334$lo3.1830@newsread2.news.pas.earthlink.net>
Message-ID: <vre9vvg3o7am3p973eqep3vjh1jd115b30@4ax.com>

"r.e.s." <r.s at ZZmindspring.com> wrote:

>I have no PYTHONPATH nor any other python-related environment 
>variables, yet everything seems fine.  (I'm using PythonWin 
>with winxp.)  As long as modules are loaded through PythonWin,
>is PYTHONPATH unnecessary?  Or am I missing something?

On Windows, the initial value of PYTHONPATH is stored in the registry:

  HKEY_LOCAL_MACHINE\
    SOFTWARE\
      Python\
        PythonCore\
          2.3\
            PythonPath
-- 
- Tim Roberts, timr at probo.com
  Providenza & Boekelheide, Inc.


From none at none.com  Wed Jan 14 12:52:29 2004
From: none at none.com (Derek)
Date: Wed, 14 Jan 2004 12:52:29 -0500
Subject: I come not to bury C++, but to praise it...
References: <mailman.337.1074032524.12720.python-list@python.org>
	<bu1uul$cam92$1@ID-46268.news.uni-berlin.de>
	<cu%Mb.47396$8H.99443@attbi_s03>
	<bu3khe$dbm5v$1@ID-46268.news.uni-berlin.de>
	<100aq779r2h2c9e@corp.supernews.com>
Message-ID: <bu3vku$den0t$1@ID-46268.news.uni-berlin.de>

"Cameron Laird" wrote:
>
> >I also use C++ and Python as my main languages and I agree
> >with your comments.  However, I don't agree that Python is
> >inherently "safer" than C++.  At best I see it as a tie.
> >For example, C++ let's you corrupt memory among other
> >"unsafe" things, most of which can be avoided by using
> >standard containers, smart pointers, etc.  Python lets you
> >do "unsafe" things such as passing an object to a function
> >when it makes no sense to do so, which can lead to nasty
> >runtime surprises.
>
> We disagree on some matters.
>
> I *do* regard Python as inherently safer than C++, and
> much more so.  My aim for now is not to persuade you to my
> view, but only to make it explicit.  Memory management, and
> mismanagement, as mundane as it is, is so poorly applied
> in so much of the C++ code I see, that it swamps all other
> dimensions of comparison between the two languages.  I
> quite agree with you that competent C++ programmers should
> exploit smart pointers and so on.  My experience is that,
> somehow, C++ as it's generally practiced appears to have
> barriers to their use.

I see your point and -- despite my original post -- I agree with it.
Reflecting on my own experience with C++, I agree that C++ does not
seem to make writing safe code as easy as it should, at least for the
uninitiated.  Standard containers (eg, vector, list, map, etc.) don't
get used as much as they should.  Robust smart pointers (eg,
boost::shared_ptr) seem to get used even less.  In terms of memory
management, Python does seem safer.

> I don't understand your last sentence, and, given my own
> focus on reliability, I very much want to understand it.
> Are you alluding precisely to Python's dynamic typing, and
> observing that, as earlier is better, C++'s compile-type
> checks beat Python's run-time checks?

Yes, I prefer compile-time checks to run-time checks.  I don't know
which method is "better" by any objective measure, but I prefer to
know if there is a problem as early as possible.  It's not hard to
make a change in Python that will go unnoticed until much later, and
in the real world test suites often don't have enough coverage to
catch every runtime error up front.




From malcolmny_1 at lycos.com  Sun Jan 25 14:43:18 2004
From: malcolmny_1 at lycos.com (malcolm)
Date: 25 Jan 2004 11:43:18 -0800
Subject: Guardian: open source is a throwback says Jack Schofield
Message-ID: <64cff82f.0401251143.328388bd@posting.google.com>

Why you can't get something for nothing
Jack Schofield Jan 22 2004

[..]

"There are also undoubted benefits from running open source software,
though the financial ones can be small or even negative. Companies are
bound to be tempted by the idea of getting something for nothing .."

"The facility to fix bugs yourself and to modify programs also sounds
attractive. However, fixing bugs is not practical for most companies,
and modifications can be positively dangerous.

If you are really going to do these things, you need to hire several
reliable programmers with kernel-level skills"

"Indeed, the whole progress of commercial computing has been from
expensive hand-written, bug-ridden, company-specific programs to
cheaper but more powerful off-the-shelf packages. From that point of
view, open source is a throwback."

- http://www.guardian.co.uk/online/story/0,3605,1127802,00.html


From eurleif at ecritters.biz  Thu Jan 22 15:18:25 2004
From: eurleif at ecritters.biz (Leif K-Brooks)
Date: Thu, 22 Jan 2004 20:18:25 GMT
Subject: Ordered dictionary?
Message-ID: <leWPb.231$af7.162835@newshog.newsread.com>

I need to associate a string (key) with an integer (value). A dictionary 
would do the job, except for the fact that it must be ordered. I also 
need to look up the value for a specific key easily, so a list of tuples 
wouldn't work.



From bombeiro03 at yahoo.com  Wed Jan 14 10:34:20 2004
From: bombeiro03 at yahoo.com (Stefan Zollinger)
Date: Wed, 14 Jan 2004 16:34:20 +0100
Subject: Reading pipes from curses applications
Message-ID: <pan.2004.01.14.15.34.20.305814@yahoo.com>


Hi 

I'm working on a "telnet" server which should serve piped output from
curses based applications. 
So far it works fine with plain text, but it looks like stdin.readline()
scrambles the control characters of curses applications. 

Does anyone know a way to work around this?

Thanks for help,

Stefan


From lance.ellinghaus at eds.com  Wed Jan 21 08:36:11 2004
From: lance.ellinghaus at eds.com (Ellinghaus, Lance)
Date: Wed, 21 Jan 2004 08:36:11 -0500
Subject: Do (USA) Python conferences require a coast?
Message-ID: <1093E8BAEB6AD411997300508BDF0A7C18D09DC7@USHEM204>

How about one in Dallas, TX?
It is central to the country and a really nice place! :)

Lance Ellinghaus
EDS - TWAI Operations Special Projects
Phone: 214-922-6458
Work Cell: 972-877-0409
Nextel Private ID: 142*52*5511
Personal Cell: 940-597-4755



-----Original Message-----
From: python-list-bounces+lance.ellinghaus=eds.com at python.org
[mailto:python-list-bounces+lance.ellinghaus=eds.com at python.org] On Behalf
Of codeapocalypse at msn.com
Sent: Wednesday, January 21, 2004 3:22 AM
To: python-list at python.org
Subject: Re: Do (USA) Python conferences require a coast?


> I'd vote for Chicago.  Of course, technically speaking we're on a coast
> also.  It should be just about the easiest city to get to from anywhere in
> the US though.

Given recent weather conditions, I'd think everyone would jump at the
idea of coming out here, to sunny Southern California for a
conference...  (I missed the Long Beach conference, and D.C. is just
so far away...and much colder, brrr. :)
-- 
http://mail.python.org/mailman/listinfo/python-list



From No.Spam.mc at No.Spam.mclaveau.No.Spam.com  Mon Jan 26 10:11:10 2004
From: No.Spam.mc at No.Spam.mclaveau.No.Spam.com (Michel Claveau/Hamster)
Date: Mon, 26 Jan 2004 16:11:10 +0100
Subject: makeExe.py
References: <mailman.761.1075035209.12720.python-list@python.org>
	<bv10fm$ocl$1@news.service.uci.edu>
Message-ID: <bv3aia$e43$1@news-reader5.wanadoo.fr>

Hi !

And more :   Negative indices are your Positive friends.


;-)





From hasan at slac.stanford.edu  Tue Jan 27 22:23:16 2004
From: hasan at slac.stanford.edu (Adil Hasan)
Date: Tue, 27 Jan 2004 19:23:16 -0800
Subject: Problem connecting to https using ZSI (openssl problem) - python2.3
Message-ID: <Pine.GSO.4.58.0401271908190.25634@flora01.slac.stanford.edu>


 Hello,
       I'm having problems trying to use ZSI to connect to a https url.
 I give the command and I get prompted for my X509 cert pass-phrase, but
 the program dies with an openssl error.

 Here's my code:

 from ZSI import *
 u=''
 n='https://shahzad.fnal.gov/edg-voms-admin/uscms/services/VOMSAdmin'
 b = Binding(url=u,ns=n, ssl=1, \
             host='shahzad.fnal.gov',port=8080, \
             cert_file='/home/hasan/.globus/usercert.pem', \
             key_file='/home/hasan/.globus/userkey.pem')
 b.listCAs()

The traceback I get is:
Enter PEM pass phrase:
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "/usr/local/python2.3/lib/python2.3/site-packages/ZSI/client.py",
line 28, in __call__
    requesttypecode=TC.Any(self.name, aslist=1))
  File "/usr/local/python2.3/lib/python2.3/site-packages/ZSI/client.py",
line 131, in RPC
    self.Send(url, opname, obj, **kw)
  File "/usr/local/python2.3/lib/python2.3/site-packages/ZSI/client.py",
line 184, in Send
    self.h.connect()
  File "/usr/local/python2.3/lib/python2.3/httplib.py", line 961, in
connect
    ssl = socket.ssl(sock, self.key_file, self.cert_file)
  File "/usr/local/python2.3/lib/python2.3/socket.py", line 73, in ssl
    return _realssl(sock, keyfile, certfile)
socket.sslerror: (1, 'error:140770FC:SSL
routines:SSL23_GET_SERVER_HELLO:unknown protocol')

Any ideas about this? Does anyone know how to solve this problem? I have
seen one post here with a similar problem, but haven't seen any
resolution.

Help!

thanks, adil


From goodger at python.org  Fri Jan 23 12:10:14 2004
From: goodger at python.org (David Goodger)
Date: Fri, 23 Jan 2004 12:10:14 -0500
Subject: PyCon2004 - Where to stay, which airport?
In-Reply-To: <buoo60$54m$1@sea.gmane.org>
References: <buoo60$54m$1@sea.gmane.org>
Message-ID: <40115576.3020100@python.org>

Another option is to stay at a hostel.  Beds at the Washington
International Student Center (http://www.washingtondchostel.com/) go
for $22/night, and there's at least one private room for $55/night.
Breakfast & kitchen facilities included.  It's located in the
Adams-Morgan area ("on the hippest street in town"), near the Dupont
Circle metro station, about 3 km (2 miles) from PyCon (GWU).  Open to
anyone, not just for students.

I just made my reservation, knowing that I'm not going to be spending 
much time in the room anyhow.

-- David Goodger




From python-list at frenchfriedhell.com  Sun Jan 18 23:38:07 2004
From: python-list at frenchfriedhell.com (python-list)
Date: Sun, 18 Jan 2004 23:38:07 
Subject: threads and loops
Message-ID: <20040118233807.29489.qmail@serversys852.com>

Hello, I posted this to the tutor list, but didn't get any responses, unless my email client really messed up.  So I'll try here.  

I'm starting to work with threads, but I'm a little confused.  I think I understand the concepts, but not the controls. Why doesn't something like this work:

#############
import threading

def counter(x):
    while tEvent.isSet():
        x+=1
        print x

def tStart():
    tEvent.set()
    if counterThread.isAlive():
        counterThread.join()
    else:
        counterThread.start()

def tStop():
    tEvent.clear()
  
counterThread=threading.Thread(target=counter, args=(1,))
tEvent=threading.Event()

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

After that I have controls setup for a Tkinter box with two buttons, one has
tStart as it's command value, and the other tStop.  When I run the program,
it starts fine, and then the loop stops when I press 'stop', but when I try
to press 'start' again, I get an error:

###########
Exception in Tkinter callback
Traceback (most recent call last):
  File "C:\myweb\python\lib\lib-tk\Tkinter.py", line 1345, in __call__
    return self.func(*args)
  File "C:\myweb\python\SNC\Script1.py", line 14, in tStart
    counterThread.start()
  File "C:\myweb\python\lib\threading.py", line 404, in start
    assert not self.__started, "thread already started"
AssertionError: thread already started
############

Because my 'while' func depends on the flag, when the flag is false, and it stops, the thread should die, right?

And why the need for the extra comma in the args value when defining my
instance?

-Stryder
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From richardshea at fastmail.fm  Wed Jan 14 15:44:11 2004
From: richardshea at fastmail.fm (Richard Shea)
Date: 14 Jan 2004 12:44:11 -0800
Subject: Accessing "GIS (ESRI shape file)" files from Python ?
References: <mailman.315.1073970137.12720.python-list@python.org>
Message-ID: <282f826a.0401141244.5a92629a@posting.google.com>

Thanks to all for the pointers to Thuban and Openev I will be checking both out.

regards

richard shea.


From lubowiecka at go2.pl  Mon Jan 26 02:08:39 2004
From: lubowiecka at go2.pl (Sylwia)
Date: 25 Jan 2004 23:08:39 -0800
Subject: problems with registering PythonService.exe
Message-ID: <f6554b84.0401252308.2baa0e61@posting.google.com>

Hi!

I have the following problem :(
After registering the "PythonService.exe" executable...

C:\Python23\Lib\site-packages\win32>PythonService.exe -register

I got the following error message:
==============================================================================
"Registering the Python Service Manager...
Fatal Python error: PyThreadState_Get: no current thread

This application has requested the Runtime to terminate it in an unusual way.
Please contact the application's support team for more information."
==============================================================================
What may be wrong ?:(

I have win32all-157 installed on my computer...

I will be grateful for any hints. 
Thank you in advance,

Sylwia


From just at xs4all.nl  Mon Jan  5 11:32:52 2004
From: just at xs4all.nl (Just)
Date: Mon, 05 Jan 2004 17:32:52 +0100
Subject: PRE-PEP: new Path class
References: <vvivefh35qjv9a@news.supernews.com>
Message-ID: <just-CC8B2B.17325205012004@news1.news.xs4all.nl>

In article <vvivefh35qjv9a at news.supernews.com>,
 "John Roth" <newsgroups at jhrothjr.com> wrote:

> I'm adding a thread for comments on Gerrit Holl's pre-pep, which
> can be found here:
> 
> http://tinyurl.com/2578q
> 
> Frankly, I like the idea. It's about time that all of the file
> and directory stuff in the os module got objectified
> properly (or at least with some semblance of OO propriety!)
> 
> In the issues section:

[ snipping those points where I agree with John ]

> 4) Should path expose an iterator for listdir(?)
> 
> I don't see why not, as long as the path is to a
> directory.

_An_ iterator, sure, but not __iter__. How about path.listdir()? :)
__iter__ could also iterate over the path elements, so it's ambiguous at 
least.

> 15. Should files and directories be the same
> class.
> 
> Probably not. While they share a lot of common
> functionality (which should be spelled out as an
> interface) they also have a lot of dissimilar
> functionality. Separating them also makes it easy
> to create objects for things like symbolic links.

But what about paths for not-yet-existing files of folders? I don't 
think you should actually _hit_ the file system, if all your doing is 
path.join().

Just


From http  Thu Jan 15 15:26:33 2004
From: http (Paul Rubin)
Date: 15 Jan 2004 12:26:33 -0800
Subject: python & mathematical methods of picking numbers at random
References: <bu6ptu$kjm$1@solaris.cc.vt.edu>
Message-ID: <7xd69largm.fsf@ruckus.brouhaha.com>

Bart Nessux <bart_nessux at hotmail.com> writes:
> I am using method 'a' below to pick 25 names from a pool of 225. A
> co-worker is using method 'b' by running it 25 times and throwing out
> the winning name (names are associated with numbers) after each run
> and then re-counting the list and doing it all over again.
> 
> My boss thinks that 'b' is somehow less fair than 'a',

Both are the same, as you can see by calculating the probability of
any given name being selected.  What is the application, and the
computer environment?  You may also need to worry about correlations
in the underlying Mersenne Twister PRNG.  If the application is
something where randomness is very important (you're picking winners
for a big lottery or something) then you should use a better RNG.


From jsbenson at bensonsystems.com  Thu Jan 15 13:36:50 2004
From: jsbenson at bensonsystems.com (John Benson)
Date: Thu, 15 Jan 2004 10:36:50 -0800
Subject: best book: aint no such thing, and encouragement for old coots
Message-ID: <0bc301c3db96$8aa3e500$8d09500a@jsbwxp3>

Hi, I see a lot of posts asking about "the best Python book." In my
experience, there is no such thing, but there are a lot of good books that
will help you along in different ways, and at different times.

First of all, I'd like to clarify my position on learning: I subscribe to
the adobe hacienda school of autodidactic technology, to wit:

"If you throw enough adobe at the side of the hacienda, some of it will
stick"

At one time or another, I've dipped into the various O'Reilly Python books,
Grayson's Python and Tkinter Programming, and Christopher's Python
Programming Patterns. They're all good, but I need to see the same difficult
or complex thing presented various times in various contexts to really get
comfortable with it. Hence the multiple viewpoints of multiple books, and I
will also read an individual book more than once, interspersed with other
volumes. Enough adobe ends up adhering to my mental hacienda so that I can
accomplish things in Python.

And now, some encouragement for old techies who have considered going into
management with writing cool software is enough:

My formal education in data processing stopped with Advanced Data Structures
back in the eighties, and I coasted along doing journeyman programming in
various COBOLs, Cs and proprietary languages. Of course, I stayed reasonably
current with stuff like Dijkstra's Structured Programming, DeMarco's
Structured Analysis, Date's Relational Database and other flavors of
business software technology which were my stock in trade, but otherwise I
avoided the paradigm of the week. Then I ran into Python about two years ago
and all of a sudden there was OOP, functional programming, aspect-oriented
programming and other stuff that I had maybe heard about but hadn't actually
worked with, all staring back at me from the pages of Python books and the
mailing list. It's been pretty much a process of creative destruction:
starting all over, but from a higher and clearer conceptual vantage point.
And, of course, I didn't really forget all the other stuff, I just pushed it
into the background long enough to get a new appreciation of it from this
new point of view. In summary, I'd like to recommend getting into Python as
a rather easy and fun way to talk the talk and walk the walk nowadays; it's
been a very rewarding and refreshing software engineering update.





From jcarlson at nospam.uci.edu  Sat Jan 31 12:35:09 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Sat, 31 Jan 2004 09:35:09 -0800
Subject: PEP 327: Decimal Data Type
In-Reply-To: <h6um10dknflfcgt3id6tril2fs3lbb3vsq@4ax.com>
References: <mailman.1054.1075487007.12720.python-list@python.org>
	<bvef14$919$1@news.service.uci.edu>
	<ad052e5c.0401310101.1c5bd5aa@posting.google.com>
	<h6um10dknflfcgt3id6tril2fs3lbb3vsq@4ax.com>
Message-ID: <bvgp4j$dp2$1@news.service.uci.edu>

> If I needed more than that, I'd use a rational type - I speak from
> experience as I set out to write a base N float library for C++ once
> upon a time and ended up writing a rational instead. A rational, BTW,
> isn't too bad to get working but that's as far as I got - doing it
> well would probably take a lot of work. And if getting Base N floats
> working was harder than for rationals, getting them to work well would
> probably be an order of magnitude harder - for no real benefit to 99%
> or more of users.

I also wrote a rational type (last summer).  It took around 45 minutes. 
  Floating point takes a bit longer to get right.

> Just because a thing can be done, that doesn't make it worth doing.

Indeed :)

  - Josiah


From aahz at pythoncraft.com  Mon Jan 26 09:33:05 2004
From: aahz at pythoncraft.com (Aahz)
Date: 26 Jan 2004 09:33:05 -0500
Subject: Class returning None ?
References: <2r4Rb.286342$e6.11127748@twister2.libero.it>
	<mailman.791.1075107363.12720.python-list@python.org>
Message-ID: <bv38f1$k1l$1@panix1.panix.com>

In article <mailman.791.1075107363.12720.python-list at python.org>,
Cliff Wells  <clifford.wells at comcast.net> wrote:
>
>from exceptions import Exception
>class SomeError(Exception): pass

BTW, there's no need to do this.  ``Exception`` lives in the built-in
namespace.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

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


From Pieter.Claerhout at Creo.com  Thu Jan 15 05:47:10 2004
From: Pieter.Claerhout at Creo.com (Pieter Claerhout)
Date: Thu, 15 Jan 2004 11:47:10 +0100
Subject: is it possible to create a win binary file from .py files ?
Message-ID: <490316A24CC5D411ACD700B0D078F7F003915D9D@cseexch01.cse.creoscitex.com>

Take a look at:

- py2exe: http://starship.python.net/crew/theller/py2exe/
- McMillan's installer: http://www.mcmillan-inc.com/install1.html
- cx_Freeze: http://starship.python.net/crew/atuining/cx_Freeze/index.html

Cheers,


pieter

Creo
pieter claerhout | product support prinergy | tel: +32 2 352 2511 |
pieter.claerhout at creo.com | www.creo.com

IMAGINE CREATE BELIEVE(tm)


-----Original Message-----
From: stephane ancelot [mailto:sancelot at free.fr] 
Sent: 15 January 2004 11:25
To: python-list at python.org
Subject: is it possible to create a win binary file from .py files ?


Hi,
I am new to python and I would like to know if there are some ways to
provide 
a binary file as target . Because my projects may contain lot of py files
and 
I do not want to provide source files . for maintenance puproses it is too 
easier for me to send only one file to my customer. 

Best Regards
Steph

 


-- 
http://mail.python.org/mailman/listinfo/python-list



From peter at engcorp.com  Thu Jan 22 14:19:29 2004
From: peter at engcorp.com (Peter Hansen)
Date: Thu, 22 Jan 2004 14:19:29 -0500
Subject: Nokia prefers Python
References: <mailman.645.1074782024.12720.python-list@python.org>
Message-ID: <40102241.E4A38F73@engcorp.com>

Stephan Deibel wrote:
> 
> Anyone happen to have a contact at Nokia that might be willing and able
> to write up a Python Success Story based on this?  Or know of someone
> else that might?
> 
> http://pythonology.org/success

Maybe it's a bit soon to call it a "success"?  It sounds like it's just
in evaluation at this stage...

-Peter


From andrew.henshaw at gtri.gatech.edu  Sun Jan 25 23:31:42 2004
From: andrew.henshaw at gtri.gatech.edu (Andrew Henshaw)
Date: Sun, 25 Jan 2004 23:31:42 -0500
Subject: Text Animation
References: <7b454334.0401242038.11404dac@posting.google.com>
Message-ID: <101961fon94ml81@corp.supernews.com>

Fazer wrote:

> Hello,
> 
> I was wondering if anyone has done any simple text-based animation?
> 
> I mean things such as text-based pre-loaders.  One example would be
> when you use the *nix utility called `wget.` You get that fancy "
> ====> " type of animation as you download a large file.  Or maybe even
> a rotating " | " that I have seen before in some installation
> programs.
> 
> Any ideas how these effects can be achieved?
> 
> Thanks a lot!
> 
> Faizan

I use this:

###################################
import sys

class Spinner:
    SYMBOLS = '|/-\\'
    def __init__(self):
        self.index = 0
        
    def __call__(self):
        sys.stdout.write(Spinner.SYMBOLS[self.index]+'\b')
        self.index = (self.index+1) % len(Spinner.SYMBOLS)

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

And call it like this:

###################################
if __name__ == '__main__':
    import time
    
    spin = Spinner()
    for i in range(100):
        spin()
        time.sleep(0.1)
###################################


This looks fine under the Win2K cmd window; but, as pointed out in another
reply, you may need to turn off the cursor.  I just tested it under Konsole
on Linux, and the block cursor doesn't allow the effect to show.

--Andy 


From tjreedy at udel.edu  Sun Jan 11 20:43:14 2004
From: tjreedy at udel.edu (Terry Reedy)
Date: Sun, 11 Jan 2004 20:43:14 -0500
Subject: Python installation breaks Outlook Express
References: <t2k3001mc170t3vdkk7f0mftcjlptkdo6a@4ax.com>
Message-ID: <B4udnRaHE-s1ZpzdRVn-vw@comcast.com>


"M. Laymon" <mxlaym009 at nospam_hotmail.com> wrote in message
news:t2k3001mc170t3vdkk7f0mftcjlptkdo6a at 4ax.com...
> I just installed Python 2.3.3 under Windows XP professional.   After I
> did, my wife tried to access her email using Outlook Express and got
> the error messages:
...
> Since the only thing I had done recently was to install Python.  I
> used system restore to go back to the point before installing Python.
> After I did, Outlook started working again.  Has anyone else seen this
> behavior ?

I find errors with either the mail service or Windows to be fairly common.
Server errors tend to disappear by waiting.  Windows glitches disappear
(often) by rebooting.  I recently 'fixed' a problem with OE on XPHome that
way.  Did you try reinstalling to see if coincidence was just that?

Terry J. Reedy




From artur_spruce at yahoo.com  Thu Jan  8 14:32:23 2004
From: artur_spruce at yahoo.com (AdSR)
Date: 8 Jan 2004 11:32:23 -0800
Subject: MySQLDB multiple cursor question
References: <3ffc6160$0$572$b45e6eb0@senator-bedfellow.mit.edu>
	<3ffd7dbe$0$560$b45e6eb0@senator-bedfellow.mit.edu>
Message-ID: <b840abf4.0401081132.6c57c82f@posting.google.com>

Brian Kelley <bkelley at wi.mit.edu> wrote:
> Brian Kelley wrote:
> > I am trying to use threads and mysqldb to retrieve data from multiple 
> > asynchronous queries.
> > 
> > My basic strategy is as follows, create two cursors, attach them to the 
> > appropriate databases and then spawn worker functions to execute sql 
> > queries and process the results.
> 
> The problem goes away if I have only one cursor per connection and just 
> use multiple connections.  This seems like a bug but I don't know for sure.
> 
> Brian

See PEP 249, read about the "threadsafety" global variable.

HTH,

AdSR


From bkelley at wi.mit.edu  Mon Jan 12 09:20:30 2004
From: bkelley at wi.mit.edu (Brian Kelley)
Date: Mon, 12 Jan 2004 09:20:30 -0500
Subject: Python And Internationalization maybe a pre-pep?
In-Reply-To: <Lg%Lb.4871$Wa.931@news-server.bigpond.net.au>
References: <3ffede43$0$563$b45e6eb0@senator-bedfellow.mit.edu>
	<Lg%Lb.4871$Wa.931@news-server.bigpond.net.au>
Message-ID: <4002acc9$0$564$b45e6eb0@senator-bedfellow.mit.edu>

Neil Hodgson wrote:
> Brian Kelley:
> 
> 
>>I made a new python string type and got enough working on the parser to
>>accept
>>
>>string = i"whatever"
> 
> 
>    I would not like to see strings gain more interpretation prefix
> characters without very strong justification as the combinational growth
> makes code interpretation more difficult. The "i" would need to be used in
> conjunction with the "u" or "U" Unicode prefix and possibly the "r" or "R"
> raw prefix.
> 
>    The order of interpretation here is reasonably obvious as the
> internationalization would be applied after the treatment as Unicode and
> raw. However, when used in conjunction with other proposed prefix characters
> such as for variable interpolation, the ordering becomes more questionable.

If the gettext mechanism is followed, it would make sense that 
i"whatever" would be a special form of unicode so multiple prefixes 
might not be necessary.

That being said, after some of the preceding discussions, I'm not sure 
that introducing a new built-in datatype would be that useful.  I'm 
leaning toward something like:

string = international("whatever")

Which would be a bit more typing but would allow

international(r"whatever")

I think that we've pretty much beaten this topic into the ground though, 
it's time to finish coding up the data type and see how it works.

Thanks for your input.
Brian



From lvraab at earthlink.net  Sat Jan 10 10:18:56 2004
From: lvraab at earthlink.net (Lucas Raab)
Date: Sat, 10 Jan 2004 15:18:56 GMT
Subject: Writing Files
Message-ID: <AJULb.1380$q4.460@newsread3.news.atl.earthlink.net>

What is the best way to go about writing to files?? Whenever I insert a
statement to write results to a file there's nothing in it. Any
suggestions??

TIA




From martin at v.loewis.de  Tue Jan  6 23:52:31 2004
From: martin at v.loewis.de (Martin v. Loewis)
Date: Wed, 07 Jan 2004 05:52:31 +0100
Subject: Getting strange characters in the command prompt
In-Reply-To: <56f42e53.0401061704.523f394@posting.google.com>
References: <56f42e53.0401061704.523f394@posting.google.com>
Message-ID: <3FFB908F.9010208@v.loewis.de>

sebb wrote:

> # -*- coding: cp1252 -*-
> print "? ? ?"
> 
> ... and I run it in the windows command prompt, I get strange
> characters I didn't ask for.
> 
[...]
> Can anyone help we with that problem?

As Irmen explains, this is because cmd.exe uses code page 850
(on your installation). You should write

print u"? ? ?"

Regards,
Martin



From eric.brunel at N0SP4M.com  Mon Jan 19 04:29:57 2004
From: eric.brunel at N0SP4M.com (Eric Brunel)
Date: Mon, 19 Jan 2004 10:29:57 +0100
Subject: Using python for _large_ projects like IDE
References: <930ba99a.0401180625.5863acd4@posting.google.com>
Message-ID: <bug7j5$acg$1@news-reader3.wanadoo.fr>

Sridhar R wrote:
> Hi,
> 
> I am a little experienced python programmer (2 months).  I am somewhat
> experienced in C/C++.  I am planning (now in design stage) to write an
> IDE in python.  The IDE will not be a simple one.  I had an idea of
> writing the IDE in C/C++, as it is a big project, bcoz of the
> following
> 
> 1. if python is used, then the memory required for running the IDE
> will be high.

It's quite hard to tell, since I've never seen anybody writing a significant 
application *both* in C/C++ and Python to compare their memory usage... I'd say 
memory usage depends a lot more on the design than on the language used. Python 
does introduce an extra cost in memory consumption, but the larger the 
application, the less you'll notice it.

> 2. if pure python is used, the IDE will be slower.

An application coded in Python will actually be slower than the same application 
coded in C/C++. I won't repeat what others have already said about what *looks* 
slow to a user.

> I'm not sure whether they are true.
> 
> Then I thought of using python for 90% of the code and using C for
> other performance critical part.  But the problem is in identifying
> the performance critical code.  People suggest to start with pure
> python and then _recode_ the performance critical code after profiling
> the original code.  But I fear whether there will be a conflit in say
> data structures.  Not yet expert in extending/embedding python.

We did just that for quite a big application and it works like a charm: the 
critical code is usually one that does many calculations and it's usually quite 
easy to isolate this part in a module handling only base types. And even if it's 
not true, as somebody already said, it's easier to handle Python objects at C 
level that it may seem at first sight.

> Are there any ways to forsee the performance critical parts?

I really think you shouldn't care; remember, "premature optimization is the root 
of all evil" ;-)

> Also, any suggestions on reducing memory usage of big applications
> written in python?

Design them keeping this problem in mind if you really have to. But... 
"premature optimization ...". You'll always be able to make compromises on a 
well designed application afterwards to reduce memory usage; it's indeed a lot 
easier than to maintain an application originally badly designed for bad reasons 
(e.g. reduce memory consumption).

HTH
-- 
- Eric Brunel <eric dot brunel at pragmadev dot com> -
PragmaDev : Real Time Software Development Tools - http://www.pragmadev.com



From bug-gs-bounces at ghostscript.com  Fri Jan 30 12:50:17 2004
From: bug-gs-bounces at ghostscript.com (bug-gs-bounces at ghostscript.com)
Date: Fri, 30 Jan 2004 09:50:17 -0800
Subject: Your message to bug-gs awaits moderator approval
Message-ID: <mailman.6091.1075485017.1262.bug-gs@ghostscript.com>

Your mail to 'bug-gs' with the subject

    hi

Is being held until the list moderator can review it for approval.

The reason it is being held:

    SpamAssassin identified this message as possible spam

Either the message will get posted to the list, or you will receive
notification of the moderator's decision.  If you would like to cancel
this posting, please visit the following URL:

    http://www.ghostscript.com/mailman/confirm/bug-gs/c960d6e9894865ef4d202f7847e966da960da673




From ville.spamstermeister.vainio at thisisspamprotectiontut.finland  Mon Jan 12 11:48:52 2004
From: ville.spamstermeister.vainio at thisisspamprotectiontut.finland (Ville Vainio)
Date: 12 Jan 2004 18:48:52 +0200
Subject: Why learn Python ??
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<btubno$bd8k6$1@ID-46268.news.uni-berlin.de>
	<tyf1xq5fbdb.fsf@pcepsft001.cern.ch>
Message-ID: <du7znct15aj.fsf@amadeus.cc.tut.fi>

>>>>> "Jacek" == Jacek Generowicz <jacek.generowicz at cern.ch> writes:

    Jacek> Lest Derek give the impression that Lisp is in any way a
    Jacek> "toy" language, or that it somehow sacrifices practicality
    Jacek> for elegance, I feel honour bound to point out that it is
    Jacek> actually the most powerful and expressive programming
    Jacek> language known to man, and excells in solving problems
    Jacek> which are often considered too hard to be solved in other
    Jacek> languages.

Python will catch up Real Soon Now - there are so many Python+Lisp
projects in the works, soon we can implement all the impossible tasks
in the world by combining development speed of Python with macro magic
of Lisp for that final, "impossible" leap :-).

    Jacek> -- Greenspun's Tenth Rule of Programming:

    Jacek> Greenspun's Tenth Rule of Programming: "Any sufficiently
    Jacek> complicated C or Fortran program contains an ad-hoc,
    Jacek> informally-specified, bug-ridden, slow implementation of
    Jacek> half of Common Lisp."

At least they should have implemented scheme instead. 

-- 
Ville Vainio   http://www.students.tut.fi/~vainio24


From sombDELETE at pobox.ru  Sun Jan  4 19:46:16 2004
From: sombDELETE at pobox.ru (Serge Orlov)
Date: Mon, 5 Jan 2004 03:46:16 +0300
Subject: Creating a capabilities-based restricted execution system
References: <LmmdnUn4seDeGWuiXTWc-w@speakeasy.net>
	<vveg0bb6is2f60@news.supernews.com> <bt7lbp$ovg$1@panix2.panix.com>
	<vveohcpod4oje0@news.supernews.com> <bt82d7$ort$1@panix3.panix.com>
	<vvg0h93ue63c0b@news.supernews.com> <bta2ng$16v7$1@nadya.doma>
	<vvh75ienj7g244@news.supernews.com>
Message-ID: <btac4k$1ekr$1@nadya.doma>


"John Roth" <newsgroups at jhrothjr.com> wrote in message news:vvh75ienj7g244 at news.supernews.com...
>
> "Serge Orlov" <sombDELETE at pobox.ru> wrote in message
> news:bta2ng$16v7$1 at nadya.doma...
> >
> > "John Roth" <newsgroups at jhrothjr.com> wrote in message
> news:vvg0h93ue63c0b at news.supernews.com...
> > >
> > > One problem I've been playing around with is: how would you
> > > implement something functionally equivalent to the Unix/Linux
> > > chroot() facility? The boundaries are that it should not require
> > > coding changes to the application that is being restricted, and it
> > > should allow any and all Python extension (not C language
> > > extension) to operate as coded (at least as long as they don't
> > > try to escape the jail!) Oh, yes. It has to work on Windows,
> > > so it's not a legitimate response to say: "use chroot()."
> >
> > I don't see any unsolvable problems. Could you be more specific
> > what is the problem? (besides time, money, need to support
> > alternative python implementation, etc...)
>
> Well, I don't see any unsolvable problems either. The biggest
> sticking point is that the Unices use hard links to create
> a directory tree that has the necessary programs availible.
> Windows does not have this capability, so an implementation
> would have to build a virtual directory structure, intercept all
> paths and map them to the virtual structure backwards and
> forwards.
>
> The reason I find it an interesting problem is that I can't see
> any way to do it with the kind of "generic" facility that was
> in the Python Restricted execution facility,  at least without a
> complete redesign of the file and directory functions and
> classes in the os module. Without that, it would
> require code in the C language implementation modules.
> Right now the file and directory management modules are a
> real mess.

Right, you can do it with a custom importer and wrapper
functions over all file and directory functions. But that's
a mess over a mess and any mess is *bad* for security.
The way out the mess is probably filepath object that
should consolidate all access to files and directories.
If you wanted to make a point that std library should
be designed with security in mind I agree with you.
One step in that direction is to design everything OO.
OO design plays nice with capabilities.

-- Serge.




From kristian.ovaska at helsinki-nospam.fi.invalid  Thu Jan 15 07:00:33 2004
From: kristian.ovaska at helsinki-nospam.fi.invalid (Kristian Ovaska)
Date: Thu, 15 Jan 2004 12:00:33 GMT
Subject: super. could there be a simpler super?
References: <mailman.385.1074156644.12720.python-list@python.org>
Message-ID: <sovc00l3iqa8cpvoc889r7npr6144hcuh5@4ax.com>

Kerim Borchaev <warkid at hotbox.ru>:
>  Is it possible that such a "super"(deducing class method declaration
>  context) could appear in Python?
>  (It seems to me that to implement a simple super something should be
>  done during "compilation" of class declaration.)

The document "Unifying types and classes in Python 2.2" by Guido
probably answers your question.

Quote from http://www.python.org/2.2.3/descrintro.html#cooperation
regarding super:

"It would be nice if we didn't have to name the class explicitly, but
this would require more help from Python's parser than we can
currently get. I hope to fix this in a future Python release by making
the parser recognize super."

-- 
Kristian Ovaska - http://www.cs.helsinki.fi/u/hkovaska/en/


From theller at python.net  Wed Jan 21 13:33:13 2004
From: theller at python.net (Thomas Heller)
Date: Wed, 21 Jan 2004 19:33:13 +0100
Subject: py2exe 0.5.0 (finally) released
References: <y8s7aeps.fsf@python.net>
	<8a27e309.0401201304.7ee860b0@posting.google.com>
	<1ebr001fkuq85al2i8c26ejceu8qvedmdb@4ax.com>
	<8a27e309.0401210959.22a2cacb@posting.google.com>
Message-ID: <u12pjgnq.fsf@python.net>

ny_r_marquez at yahoo.com (R.Marquez) writes:

> Wolfgang Strobl <news2 at mystrobl.de> wrote 
>> icon_resources works for me, like so:
>> 
>> setup( windows = ["wxKnife.py",
>>     {"script":"wxKnife.py","icon_resources":[(1,"images/app2.ico")]}],
>>     console=["installed_updates.py","installed_sw.py"],
>>     data_files=[("images",["images/app2.ico",]),]
>>     )
>
> That worked.  I see that I need to visit the wiki page now. Thank you.
>
> -Ruben

It is also in the samples\advanced, although commented out.

Thomas


From ramen at lackingtalent.com  Sat Jan 10 01:54:00 2004
From: ramen at lackingtalent.com (Dave Benjamin)
Date: Sat, 10 Jan 2004 06:54:00 -0000
Subject: Straw poll on Python performance (was Re: Python is far from a
	top performer ...)
References: <mailman.247.1073688079.12720.python-list@python.org>
Message-ID: <slrnbvv8sg.1dl.ramen@lackingtalent.com>

In article <mailman.247.1073688079.12720.python-list at python.org>, Robert Brewer wrote:
>> Do you spend a "significant" amount of time actually
>> optimizing your Python applications?  (Significant is
>> here defined as "more than five percent of your time",
>> which is for example two hours a week in a 40-hour
>> work week.)
> 
> No, I don't. The big object server I'm working on now for four months
> (which actually *has* some performance requirements) has had _one_
> optimization round. I noticed some slowness, profiled the problem down
> to the DB layer, and solved it by switching my ADO recordset to
> read-only. That cut the load time of objects to 1/3 of what it was
> before the optimization. All the other operations to get that data laid
> out on a web page were insignificant in comparison.

That's generally been my experience as well.

> Generally, I tend to "worry" far more about interface design (for both
> users and developers) than performance.

Thank you! I couldn't say it better.

-- 
.:[ dave benjamin (ramenboy) -:- www.ramenfest.com -:- www.3dex.com ]:.
: d r i n k i n g   l i f e   o u t   o f   t h e   c o n t a i n e r :


From nekiv at start.no  Mon Jan 26 08:16:43 2004
From: nekiv at start.no (Olav)
Date: 26 Jan 2004 05:16:43 -0800
Subject: Py2exe and WMI module
Message-ID: <697d8a6c.0401260516.40e51096@posting.google.com>

I'm having a problem when I try to make a standalone installation of a
Python program using Tim Goldens WMI-module.  The py2exe produce the
exe-file as expected, but it fails to execute.

I have run makepy manually on one all of the above libraries. 

Microsoft WMI Scripting Library
WMI ADSI Extension Type Library
WMICntl Type Library


test-fail.py (my script)
-----------------------
import wmi
-----------------------


setup.py (my setupscript)
-----------------------
# setup.py
from distutils.core import setup
import py2exe
      
setup(console=["test-fail.py"])
-----------------------


Output from exe-file:


Traceback (most recent call last):
  File "test-fail.py", line 1, in ?
    import wmi
  File "wmi.pyc", line 132, in ?
  File "win32com\client\gencache.pyc", line 527, in EnsureDispatch
  File "win32com\client\CLSIDToClass.pyc", line 50, in GetClass
KeyError: '{D2F68443-85DC-427E-91D8-366554CC754C}'

Anyone?

regards 
Olav


From stuart at bmsi.com  Mon Jan 19 22:02:31 2004
From: stuart at bmsi.com (Stuart D. Gathman)
Date: Mon, 19 Jan 2004 22:02:31 -0500
Subject: speedy Python strings?
References: <buhtjb$ida$1@news.rz.uni-karlsruhe.de>
Message-ID: <pan.2004.01.20.03.02.31.383045@bmsi.com>

On Tue, 20 Jan 2004 01:43:24 +0100, Uwe Mayer wrote:

> class myFile(file):
>         def read(self, *args):
>                 ...
#           self.buffer += file.read(self, *args) # not this
	    self.buffer = self.buffer[self.pos:] + file.read(self, *args)
	    self.pos = 0
>                 ...
> 
> and after reading information from the buffer I remove the read part from
> it:
>         
#         text = struct.unpack("L", self.buffer[:4])
#         self.buffer = self.buffer[4:]
	  pos = self.pos
	  text = struct.unpack("L", self.buffer[pos:pos+4])
	  self.pos = pos + 4

-- 
	      Stuart D. Gathman <stuart at bmsi.com>
Business Management Systems Inc.  Phone: 703 591-0911 Fax: 703 591-6154
"Confutatis maledictis, flamis acribus addictis" - background song for
a Microsoft sponsored "Where do you want to go from here?" commercial.



From mmoum at woh.rr.com  Wed Jan 14 19:13:33 2004
From: mmoum at woh.rr.com (DoubleM)
Date: Thu, 15 Jan 2004 00:13:33 GMT
Subject: Tkinter: modal ok in windows, but not in Linux
Message-ID: <NWkNb.2858$fU.1773@fe2.columbus.rr.com>

Hi,

I'm running Python2.3.3c1 on Mandrake 9.1

The following code is designed to bring up a window with a button labeled
"popup".  Clicking on the popup buttons triggers a secondary window with a
button labeled "ok".  The second window is supposed to be modal - it should
not be possible to reset the focus back to the first window or close the
first window without first closing the second.  The program works just fine
in Windows XP home, but in Linux I can close the first window while the
second one is still active.

This seems to be a bug, or am I doing something wrong.  I searched google
for Tkinter Linux modal, but found nothing relevant.

Thanks for your help.

Here's the code, copied and pasted from IDLE.

#############################
from Tkinter import *

makemodal = 1

def dialog():
    win = Toplevel()
    Label(win, text = "Secondary").pack()
    Button(win, text = "Ok", command = win.destroy).pack()
    if makemodal:
        win.focus_set()
        win.grab_set()
        win.wait_window()
    print "dialog exit"

root = Tk()
Button(root, text = 'popup', command = dialog).pack()
root.mainloop()
#################################

Mike
mmoum-xxxspam.woh.rr.com
-- 
Remove -xxxspam to reply



From alan.gauld at btinternet.com  Thu Jan  8 17:04:08 2004
From: alan.gauld at btinternet.com (Alan Gauld)
Date: Thu, 08 Jan 2004 22:04:08 GMT
Subject: OT: What is Mac OS X?
References: <btkg49$lh7$1@panix2.panix.com>
Message-ID: <3ffdd365.360302036@news.blueyonder.co.uk>

On 8 Jan 2004 15:55:37 -0500, aahz at pythoncraft.com (Aahz) wrote:
> http://www.kernelthread.com/mac/osx/
> 
> Good technical summary for all the Macaholics here.

I agree, and as someone who got is first Mac at exactly the same
date as the author I'll add one extra observation.

Multi button mice for Mac are not only available but they
actually work as you would expect (including the scrollwheels!)
with the standard Mac applications as well as with X windows
ones...

Alan g.
Author of the Learn to Program website
http://www.freenetpages.co.uk/hp/alan.gauld


From peter at engcorp.com  Wed Jan 28 09:14:16 2004
From: peter at engcorp.com (Peter Hansen)
Date: Wed, 28 Jan 2004 09:14:16 -0500
Subject: Upgrading to Python 3.0 Questions
References: <bv6uuc$og309$1@ID-221199.news.uni-berlin.de>
Message-ID: <4017C3B8.8E3E3642@engcorp.com>

Zachary wrote:
> 
> I've heard some rumors about Python 3.0.  I am wondering what sort of
> upgrading I'll have to do, as I have also heard people on this group asking
> us to use certain modules or operators or whatever.
> Is it a major sort of upgrade?  What would I need to do to prepare for it?

All available information about Python 3.0 is very clearly posted on the 
www.python.org site right under "Python versions" in the "Python 3.0" link.  <wink>

-Peter


From nosmapplease at somewhere.com  Sat Jan 31 18:25:51 2004
From: nosmapplease at somewhere.com (Psymaster)
Date: 31 Jan 2004 23:25:51 GMT
Subject: Problems embedding Python
Message-ID: <Xns9482E9728C0Ct45fs6vve@130.133.1.4>

I've tried running scripts from the embedded interpreter but it doesn't 
work. If I try the same scripts as strings to interpret it works. Here 
is my program:

#include <stdio.h>
#include "Python.h"

int main(int argc, char *argv[])
{
  FILE *script = fopen("c:/c.py", "r");

  Py_Initialize();  
  PyRun_SimpleFile(script, "c.py");
  Py_Finalize();

  return 0;
}


c.py contains just a simple print statement.

This compiles and links under MSVC 6 but when run crashes. Any help?


From paul at prescod.net  Wed Jan 21 04:24:41 2004
From: paul at prescod.net (Paul Prescod)
Date: Wed, 21 Jan 2004 01:24:41 -0800
Subject: Weaver/Yarn Pattern in Python
In-Reply-To: <20040121062432.GA6158@ics.uci.edu>
References: <20040121062432.GA6158@ics.uci.edu>
Message-ID: <400E4559.3020704@prescod.net>

I've tried to understand your problem statement in detail but it is alot 
to keep in the head in pure abstraction (i.e. I don't have your specific 
problem and haven't worked on this complicated a tree walker in a while 
if ever). Also, I think there may have been some typos that are making 
it harder to understand. For instance, is visitB supposed to be 
syntactically identical to visitA except it calls weaveB's instead of 
weaveA's? Is this the boilerplate that offends you?

But maybe I can help anyhow. Here's some code from your post:

 > class Weaver:
 >     "A special visitor which weaves yarns"
 >     def __init__(self, yarns):
 >         self.yarns = yarns
 >     def visitA(self, a):
 >         for y in self.yarns:
 >             y.weaveA_First(a)
 >         for i, k in enumerate(a.kids):
 >             for y in self.yarns:
 >                 y.weaveA_Before(a, i)
 >             k.accept(self)
 >             for y in self.yarns:
 >                 y.weaveA_After(a, i)
 >         for y in self.yarns:
 >             y.weaveA_First(a)
 >     def visitB(self, b):
 >         for y in self.yarns:
 >             y.weaveA_First(b)
 >         for y in self.yarns:
 >             y.weaveA_First(b)

I'm going to presume that visitB was supposed to be more like:

 >     def visitB(self, b):
 >         for y in self.yarns:
 >             y.weaveB_First(b)
 >            ... identical to visitA except A's swapped for B's ...

If it isn't identical to visitA (except for the B) then I don't know 
what the boilerplate is. Also, you end visitA with a weaveA_First but 
you probably mean weaveA_Last.

If I'm understanding right, I think each yarn has a two-D matrix of methods:

           A        B          C        D  ....
First
Before
After
Last

And then you've got another dimension for the yarns (that varies at runtime)

There are many ways to represent these axes in Python:

self.yarns[0]["A"]["First"]
self.yarns[0]["A", "First"]
self.yarns[0]["A_First"]
self.yarns[0]["A"].First()


class Weaver:
     "A special visitor which weaves yarns"
     def __init__(self, yarns):
          self.yarns = yarns
     def visit(self, a):
          for y in self.yarns:
              y.threads[a.type].First(a)
          for i, k in enumerate(a.kids):
              for y in self.yarns:
                  y.threads[a.type].Before(a, i)
              k.accept(self)
              for y in self.yarns:
                  y.threads[a.type].After(a, i)
          for y in self.yarns:
              y.threads[a.type].Last(a)

Now a yarn becomes essentially a holder for a dictionary of what I've 
called threads (that'll confuse your co-workers!).

And a thread works with a particular node type, doing the First, Before, 
After and Last for it.

The "thread" looks something like:



class X_Yarn_A_thread:
	self.type == "A"
	def First(self, arg):
		assert arg.type == self.type
		return self.first(arg)

	def Before(self, arg):
		assert arg.type == self.type
		return self.before(arg)

The asserts may be useless considering how bullet-proof the Weaver code 
should be...you dispatch on a.type so how could a thread end up with the 
wrong type?

Hacking together method names with strings is only ever a sort of 
syntactic sugar for some other design that uses dictionaries "properly". 
Remember that Python has at its core a similar feature set to Scheme and 
Lisp which are famously "flexible" and "powerful" and yet do not do any 
name manging weirdness. It's great that Python allows that name manging 
stuff but if you feel you HAVE to use it then you probably aren't 
thinking in terms of higher order functions or objects in contrainers as 
you could/should. You should think about hwo to do things without 
method-name hacking before deciding that that's a better solution for 
some reason of expedience or usability.

  Paul Prescod




From giva at users.sourceforge.net  Thu Jan  8 11:35:21 2004
From: giva at users.sourceforge.net (Gisle Vanem)
Date: Thu, 8 Jan 2004 17:35:21 +0100
Subject: Module depends tool
Message-ID: <3ffd87c4$1@news.broadpark.no>

Is there a tool to show which dynamic modules (*.pyd/*.dll) a 
script depends on w/o running it? And the path(s) where python would
have loaded it from. Something like Cygwin's cygcheck does for 
PE modules.

G:\Programfiler\Python.23\Lib\site-packages>cygcheck pcapy.pyd
Found: .\pcapy.pyd
pcapy.pyd
  g:\Mingw32\bin\wpcap.dll
    f:\windows\System32\ADVAPI32.DLL
      f:\windows\System32\ntdll.dll
      f:\windows\System32\KERNEL32.dll
      f:\windows\System32\RPCRT4.dll
    f:\windows\System32\msvcrt.dll
    f:\windows\System32\USER32.dll
      f:\windows\System32\GDI32.dll
    f:\windows\System32\WS2_32.DLL
      f:\windows\System32\WS2HELP.dll
  f:\windows\System32\python23.dll
    f:\windows\System32\SHELL32.dll
      f:\windows\System32\SHLWAPI.dll

-- 
Gisle V.

# rm /bin/laden 
/bin/laden: Not found 


From cygnus at cprogrammer.org  Sat Jan 24 08:48:34 2004
From: cygnus at cprogrammer.org (Jonathan Daugherty)
Date: Sat, 24 Jan 2004 08:48:34 -0500
Subject: [OPINION] - does language really matter if they all do the
	samething?
In-Reply-To: <69A0D4AB81C51447AD6BA387782B8D64093D8A@midl-mail4.etcconnect.com>
References: <69A0D4AB81C51447AD6BA387782B8D64093D8A@midl-mail4.etcconnect.com>
Message-ID: <20040124134834.GA13149@mail.theserver.ath.cx>

I propose a perl-vs-python at lists.sourceforge.net list.

-- 

  Jonathan Daugherty
  http://www.cprogrammer.org

  "It's a book about a Spanish guy called Manual, you should read it."
                                                            -- Dilbert



From python at quixs.com  Sun Jan 18 09:15:44 2004
From: python at quixs.com (Lars Heuer)
Date: Sun, 18 Jan 2004 15:15:44 +0100
Subject: Webbrowser and Mozilla control on linux
In-Reply-To: <1d17eeb7.0401171633.170e313a@posting.google.com>
References: <1d17eeb7.0401171633.170e313a@posting.google.com>
Message-ID: <929559882.20040118151544@quixs.com>

Hi Jay,

> If anyone can share some samples, or point me to a good
> reference with browser control details, I'd much appreciate

Documancer, a wxPython app uses Mozilla to display pages (using
wxMozilla).

Documancer:
  http://documancer.sf.net/

wxMozilla:
  http://wxMozilla.sf.net/

HTH,
Lars




From hilfmir at gmx.at  Tue Jan 13 11:55:59 2004
From: hilfmir at gmx.at (mzo)
Date: 13 Jan 2004 08:55:59 -0800
Subject: Cannot press OK in Windows Print Dialog / How can i print in
	Windows ?
Message-ID: <2d0e7cf4.0401130855.d55d411@posting.google.com>

Hello 
I want to use the Standard Windows Common Dialog, because i want a
orginal Windows Look and Feel in a pyGTK - GUI.

I use Python 2.3 with PythonWin GUI Extension and Win32 Extension. 

ColorSelectionDialog, FileSelectionDialog, FontSelectionDialog work
well, but
PrintDialog do not work. 

I have made a small example: 
-----------------------------
import win32ui
import gtk

dllhandle = win32ui.LoadLibrary("C:\\WINNT\\SYSTEM32\\COMDLG32.DLL")

pcd = win32ui.CreatePrintDialog(1538, gtk.FALSE,
win32ui.PD_NOPAGENUMS|win32ui.PD_PAGENUMS|win32ui.PD_SELECTION|win32ui.PD_SHOWHELP|win32ui.PD_PRINTTOFILE|win32ui.PD_ALLPAGES,
None, dllhandle )

res = pcd.DoModal()
-----------------------------

This Example load the Print Dialog/ Print Setup but if i press OK
nothing do (The dialog do not close, like expected). I can the Window
only close with Cancel and get "2" back.
Whats?s wrong ? 
How can i get the Settings and print with this settings after the
dialog ?


A not so important question is, how i can connect a Help-message to
the Help button in the Print Dialog ?



The Pythonwin-Printdialog  (from pywin.mfc import dialog) use the
CreatePrintDialog but i do not know whats pinfo.
Where can i get pinfo (need to call this function). 


The Head of PrintDialog is: 
-----------------------------------------
class PrintDialog(Dialog):
	" Base class for a print dialog"
	def __init__(self, pInfo, dlgID,
                     printSetupOnly = 0,
                     flags=(win32ui.PD_ALLPAGES|
                            win32ui.PD_USEDEVMODECOPIES|
                            win32ui.PD_NOPAGENUMS|
                            win32ui.PD_HIDEPRINTTOFILE|
                            win32ui.PD_NOSELECTION),
                     parent=None,
                     dllid=None):
-------------------------------




Thanks 
martin


From Kyler at news.Lairds.org  Mon Jan 19 23:12:09 2004
From: Kyler at news.Lairds.org (Kyler Laird)
Date: Tue, 20 Jan 2004 04:12:09 GMT
Subject: efficent test for array with only one value?
References: <00ird1-dmd.ln1@jowls.lairds.org>
	<PJYOb.82151$C87.70674@twister.socal.rr.com>
Message-ID: <25mud1-s1m.ln1@jowls.lairds.org>

Robert Kern <rkern at ucsd.edu> writes:

> >>> from Numeric import *
> >>> a = ones((3,5))
> >>> equal.reduce(a.flat)
>1
> >>> a[0,3] = 0
> >>> equal.reduce(a.flat)
>0
> >>>

>Ufuncs are wonderful things.

Yeah, but they also don't work for this.  First, I'm guessing that reduce
will not stop immediately when equal encounters a False.  (It doesn't do
"and".)

Also, it just plain doesn't work.
	>>> import Numeric
	>>> a = Numeric.zeros((3,5))
	>>> Numeric.equal.reduce(a.flat)
	0
	>>> Numeric.equal.reduce([0,0,0,0,0,0,1])
	1

--kyler


From M.Waack at gmx.de  Thu Jan  8 16:19:30 2004
From: M.Waack at gmx.de (Mathias Waack)
Date: Thu, 08 Jan 2004 22:19:30 +0100
Subject: scanning c-code
References: <btj4oo$g58$1@piggy.rz.tu-ilmenau.de>
Message-ID: <24u0d1-g04.ln1@valpo.de>

tm wrote:
> I have to to scan c-code, look for a c-struct variable(declaration)
> and represent the struct in a tree-graphic.
> Are there modules for scanning c-code and graphictools for the
> representation stuff.
> What would you advise as a starting point...

www.doxygen.org and graphviz (the latter is used by the former). 


Mathias


From nospam at no.spam  Sat Jan 17 04:08:56 2004
From: nospam at no.spam (Andrae Muys)
Date: Sat, 17 Jan 2004 19:08:56 +1000
Subject: Suggested generator to add to threading module.
In-Reply-To: <bu998t$o62$1@panix1.panix.com>
References: <7934d084.0401152058.164a240c@posting.google.com>
	<bu998t$o62$1@panix1.panix.com>
Message-ID: <4008fba9@duster.adelaide.on.net>

Aahz wrote:
> In article <7934d084.0401152058.164a240c at posting.google.com>,
> Andrae Muys <amuys at shortech.com.au> wrote:
> 
>>Found myself needing serialised access to a shared generator from
>>multiple threads.  Came up with the following
>>
>>def serialise(gen):
>> lock = threading.Lock()
>> while 1:
>>   lock.acquire()
>>   try:
>>     next = gen.next()
>>   finally:
>>     lock.release()
>>   yield next
> 
> 
> I'm not sure this is generic enough to go in the standard library.
> Usually, I'd recommend that someone wanting this functionality consider
> other options in addition to this (such as using Queue.Queue()).

While I fully appreciate the importance of a Queue.Queue in implementing 
a producer/consumer task relationship, this particular function provides 
serialised access to a *passive* data-stream.  With the increasing 
sophistication of itertools and I feel there maybe an argument for 
supporting shared access to a generator.

Anyway I thought it was worth offering as a possible bridge between the 
itertools and threading modules.  If I'm mistaken, then it's no major loss.

Andrae



From mwh at python.net  Wed Jan 21 15:12:18 2004
From: mwh at python.net (Michael Hudson)
Date: Wed, 21 Jan 2004 20:12:18 GMT
Subject: SystemError while execing bad code
References: <mailman.543.1074599606.12720.python-list@python.org>
Message-ID: <m3hdyp5ae5.fsf@pc150.maths.bris.ac.uk>

Gerrit Holl <gerrit at nl.linux.org> writes:

> Hi,
> 
> I found a cool way to trigger a SystemError:

How about marshal.loads('0') ?

> >>> exec CodeType(0,0,0,0,"",(),(),(),"","",0,"")
> XXX lineno: 0, opcode: 0
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
>   File "/usr/lib/python2.2/site-packages/", line 0, in
>     File "/usr/lib/python2.2/site-packages/", line 0, in
> SystemError: unknown opcode
[snippety]
> But I guess this is a case of "so don't do it" :-)?

Definitely.  It's easy enought to crash the interpreter this way
(think LOAD_CONST 30000, for just one easy way).

Cheers,
mwh

-- 
 Very clever implementation techniques are required to implement this
 insanity correctly and usefully, not to mention that code written
 with this feature used and abused east and west is exceptionally
 exciting to debug.       -- Erik Naggum on Algol-style "call-by-name"


From tjreedy at udel.edu  Fri Jan  2 00:12:38 2004
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 2 Jan 2004 00:12:38 -0500
Subject: question: Python or Lua for rejuvenation of old PCs?
References: <mailman.16.1072987285.12720.python-list@python.org>
Message-ID: <8oKdneXkV7RcYGmiRVn-hQ@comcast.com>


"John Benson" <jsbenson at bensonsystems.com> wrote in message
news:mailman.16.1072987285.12720.python-list at python.org...
> I suppose that my question is best phrased as this: What is a comfortable
> minimum RAM size that a PC needs to have to comfortably run modern Python
> for non-memory-intensive applications (i.e. no big database crunching or
> other thrashy stuff). I'm thinking about just polling sensors and
actuating
> control devices over RS-232/RS-485/LAN and doing some chitchat between
the
> nodes over the LAN. Based on the response, I'll draw the line between my
Lua
> machines and my Python machines.

I did my first useful Python work with old DOS version on a 4 MB machine.
Disk memory size and running RAM memory size are different issues.  I have
read that Lua beats Python on minimal disk footprint but have no idea of
running size.  On Windows, Python.exe is very small but does import several
modules, though I believe it could be built to require less.

Terry J. Reedy




From adonisv at REMOVETHISearthlink.net  Sun Jan  4 14:52:32 2004
From: adonisv at REMOVETHISearthlink.net (Adonis)
Date: Sun, 04 Jan 2004 19:52:32 GMT
Subject: Tkinter.Menu() Question
Message-ID: <4a_Jb.8099$6B.48@newsread1.news.atl.earthlink.net>

I wish to create a popup menu from a list, when it is created they all show
the same label from the list:

Months = [0, 'January', 'February', 'March', 'April', 'May', 'June',
            'July', 'August', 'September', 'October', 'November',
'December']

def _Menu_Click(self, month):
    print month

menu = Menu(fraMain, tearoff=0)

for Month in Months[1:]:
    menu.add_command(label=Month, command=lambda : _Menu_Click(Month))

When the menu calls _Menu_Click(...) it always prints 'December'

Now my understanding is the when an object is created and it is replicated,
whichever of the modified replications affects all of the objects, being
that they are just mere references to the original (my wording might be off,
correct me if I am wrong). How do I avoid this for what I am trying to
achieve?

Any help is greatly appreciated.

Adonis




From arjen.dijkstraNoSpam at hccnet.nl  Fri Jan 16 07:50:05 2004
From: arjen.dijkstraNoSpam at hccnet.nl (duikboot)
Date: Fri, 16 Jan 2004 13:50:05 +0100
Subject: Setting Window Size using Pack Under Tkinter
References: <8089854e.0401160134.5674a86c@posting.google.com>
Message-ID: <4007de09$0$151$e4fe514c@dreader5.news.xs4all.nl>

from Tkinter import *
gui=Tk()

####code####
gui.geometry("+%d+%d" %(300, 100))
gui.resizable(0,0)

if __name__=='__main__':
    gui.mainloop()




"Fuzzyman" <michael at foord.net> schreef in bericht
news:8089854e.0401160134.5674a86c at posting.google.com...
> I'm having trouble implementing my GUI using Tkinter......
> I've been working through the Tkinter tutorials from 'Programming
> Python' and am generally happy enough with the functionality and feel
> of the results *but* - I can't see how to set the size of the root
> window (or any top level window) and to stop it being resized........
>
> Thanks for any help.
>
> Fuzzyman
>
>
> --
>
> YAPLP
> Yet Another Python Links Page
> http://www.voidspace.org.uk/coollinks/python_links.shtml
>
> Python Utils
> http://www.voidspace.org.uk/atlantibots/pythonutils.html
>
> --
>
> http://www.Voidspace.org.uk
> The Place where headspace meets cyberspace. Online resource site -
> covering science, technology, computing, cyberpunk, psychology,
> spirituality, fiction and more.
>
> ---
> http://www.atlantibots.org.uk
> http://groups.yahoo.com/group/atlantis_talk/
> Atlantibots - stomping across the worlds of Atlantis.
> ---
> http://www.fuchsiashockz.co.uk
> http://groups.yahoo.com/group/void-shockz
> ---
>
> Everyone has talent. What is rare is the courage to follow talent
> to the dark place where it leads. -Erica Jong
> Ambition is a poor excuse for not having sense enough to be lazy.
>          -Milan Kundera




From elainejackson7355 at home.com  Thu Jan 29 12:58:45 2004
From: elainejackson7355 at home.com (Elaine Jackson)
Date: Thu, 29 Jan 2004 17:58:45 GMT
Subject: conditional expression sought
Message-ID: <pRbSb.330334$ts4.37644@pd7tw3no>

If bool(B_i)==True for 1<=i<=n and j is the smallest i with bool(A_j)==True,
then the evaluation of (A_1 and B_1) or ... or (A_n and B_n) returns B_j without
evaluating any other B_i. This is such a useful mode of expression that I would
like to be able to use something similar even when there is an i with
bool(B_i)==False. The only thing I can think of by myself is ( (A_1 and [B_1])
or ... or (A_n and [B_n]) )[0], and I can't be satisfied with that for obvious
reasons. Does anybody know a good way to express this? Any help will be mucho
appreciado.

Peace




From simonb at NOTTHISBIT.webone.com.au  Wed Jan 14 19:50:41 2004
From: simonb at NOTTHISBIT.webone.com.au (Simon Burton)
Date: Thu, 15 Jan 2004 11:50:41 +1100
Subject: Cyclic garbage collection and segfaults...
References: <pan.2004.01.14.20.21.41.430958@birc.dk>
Message-ID: <pan.2004.01.15.00.50.39.813705@NOTTHISBIT.webone.com.au>


> Can anyone explain what I'm doing wrong?  Or perhaps suggest a better
> solution to my "real" problem, if I'm approaching the problem completely
> wrong :-)
> 
> Yours,
> 	/mailund

In my extensions python seems to segfault in the GC most of all...
Just yesterday I removed a malloc that was (why??) causing a segfault.

Have you seen pyrex ? It's absolutely brilliant. Take 2 hours to try it
out if you have the time.

Simon.



From claird at lairds.com  Wed Jan 14 11:05:59 2004
From: claird at lairds.com (Cameron Laird)
Date: Wed, 14 Jan 2004 16:05:59 -0000
Subject: I come not to bury C++, but to praise it...
References: <mailman.337.1074032524.12720.python-list@python.org>
	<bu1uul$cam92$1@ID-46268.news.uni-berlin.de>
	<cu%Mb.47396$8H.99443@attbi_s03>
	<bu3khe$dbm5v$1@ID-46268.news.uni-berlin.de>
Message-ID: <100aq779r2h2c9e@corp.supernews.com>

In article <bu3khe$dbm5v$1 at ID-46268.news.uni-berlin.de>,
Derek <none at none.com> wrote:
			.
			.
			.
>I also use C++ and Python as my main languages and I agree with your
>comments.  However, I don't agree that Python is inherently "safer"
>than C++.  At best I see it as a tie.  For example, C++ let's you
>corrupt memory among other "unsafe" things, most of which can be
>avoided by using standard containers, smart pointers, etc.  Python
>lets you do "unsafe" things such as passing an object to a function
>when it makes no sense to do so, which can lead to nasty runtime
>surprises.
>
>

We disagree on some matters.

I *do* regard Python as inherently safer than C++, and much more so.
My aim for now is not to persuade you to my view, but only to make
it explicit.  Memory management, and mismanagement, as mundane as it
is, is so poorly applied in so much of the C++ code I see, that it
swamps all other dimensions of comparison between the two languages.
I quite agree with you that competent C++ programmers should exploit
smart pointers and so on.  My experience is that, somehow, C++ as
it's generally practiced appears to have barriers to their use.

I don't understand your last sentence, and, given my own focus on
reliability, I very much want to understand it.  Are you alluding
precisely to Python's dynamic typing, and observing that, as earlier
is better, C++'s compile-type checks beat Python's run-time checks?
-- 

Cameron Laird <claird at phaseit.net>
Business:  http://www.Phaseit.net


From jjl at pobox.com  Fri Jan 23 07:32:04 2004
From: jjl at pobox.com (John J. Lee)
Date: 23 Jan 2004 12:32:04 +0000
Subject: Help and optimization hints, anyone?
References: <pan.2004.01.23.10.41.31.93597@lignus.dk>
Message-ID: <87d69a6e2j.fsf@pobox.com>

Kim Petersen <kim at lignus.dk> writes:

> I've worked on this table object a bit too long - and seem to have
> stared too long at the code. Can someone see where it goes wrong in
> the insertrow function?

I made a few comments before I realised it was a Tkinter question, so
no answer, sorry!  Just some style hints.

BTW, it's very helpful to mention in the subject line when a
particular GUI toolkit is involved (or when any other large library is
a central part of the question, for that matter).


> Also optimization hints and alternatives will be greatly appreciated.
> 
> <code>
> #!env python
> #
> # created: "15:19 20/01-2004" by Kim Petersen <kim at vindinggaard.dk>
> #
> # $Id$
> #
> import Tkinter
> 
> class UserDict:

Bad name -- UserDict is a standard library module.  In 2.2 or newer,
you can subclass dict.  In 2.3, you also have the option of
subclassing UserDict.DictMixin.  If you just want to implement part of
the maping interface, just call your class something other than
UserDict -- say SimpleDefaultDictBase.


>    defaults={}
>    def __init__(self,inherit=None):
>       if not inherit:
>          self.inherit=[]
>       else:
>          self.inherit=inherit
>       self.dict=self.defaults.copy()
> 
>    def __setitem__(self,name,value): self.dict[name]=value
> 
>    def __getitem__(self,name):
>       if not self.dict.has_key(name):
>          for dict in self.inherit:

dict is also a bad name -- this is the name of the builtin dictionary
type, which you've just clobbered (in the local scope).


>             if dict.has_key(name):
>                return dict[name]
>          raise KeyError,"%s not found" % (name,)
>       return self.dict[name]
> 
>    def haskey(self,name): return self.dict.has_key(name)

Did you really mean to call it that?  The dict interface has a method
.has_key(), not .haskey().


> class Cell(UserDict):
>    defaults={"width": 0,"height": 0,"text": '',"color": "black","background": "white",
>             "widgets": None}
[...]

Haven't read much further, but it looks like you might be better off
using attribute access rather than indexing.  In 2.2, use properties.
Earlier, use __setattr__ / __getattr__ (make sure you read the docs).


John


From jjl at pobox.com  Tue Jan  6 13:49:45 2004
From: jjl at pobox.com (John J Lee)
Date: Tue, 6 Jan 2004 18:49:45 +0000 (GMT)
Subject: Why does this fail?
In-Reply-To: <16378.58491.796532.530331@montanaro.dyndns.org>
References: <vvhdlm72386b3c@corp.supernews.com> <878yklavnx.fsf@pobox.com>
	<16378.58491.796532.530331@montanaro.dyndns.org>
Message-ID: <Pine.LNX.4.58.0401061846300.907@alice>

On Tue, 6 Jan 2004, Skip Montanaro wrote:
[...]
>     John> http://wwwsearch.sf.net/bits/clientx.html
>
> A possible addition to your "Embedded script is messing up my web-scraping"
> section:  Wasn't there mention of the Mozilla project's standalone
> JavaScript interpreter (don't remember what it's called) recently alongside
> some Python interface?

(Just finished updating that page a few seconds ago, BTW.)

I don't remember that, other than PyXPCOM (linked to from that page -- at
least, it is now ;-) and my own

http://wwwsearch.sf.net/python-spidermonkey
http://wwwsearch.sf.net/DOMForm

Be warned, all my JavaScript-support code is very alpha (DOMForm itself
shouldn't be anywhere near so bad, but still very early alpha).


John



From xerolimit126 at earthlink.net  Tue Jan 27 19:56:13 2004
From: xerolimit126 at earthlink.net (Xero Limit 126)
Date: Wed, 28 Jan 2004 00:56:13 GMT
Subject: Easy way to make EXEs...
Message-ID: <NMDRb.28013$i4.26542@newsread1.news.atl.earthlink.net>

Okay, I am completely new to Python, and I really dont understand much, but
I was wondering how to make a python script/program into a standalone .EXE?
I dont understand py2exe at all, so if someone could tell me or find me an
easy (For a newbie) to convert Python scripts to EXEs, please let me know!

Thanks for any help!




From jcarlson at nospam.uci.edu  Fri Jan 30 22:10:07 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Fri, 30 Jan 2004 19:10:07 -0800
Subject: Python vs. Io
In-Reply-To: <711c7390.0401301726.3e38da27@posting.google.com>
References: <711c7390.0401291301.3f95794@posting.google.com>
	<D6wSb.6538$qU3.576425@news20.bellglobal.com>
	<711c7390.0401301726.3e38da27@posting.google.com>
Message-ID: <bvf6el$2v$1@news.service.uci.edu>

> I'm not sure how to tell you this so I'll just give a heavily
> commented example (comments in Io are with #, //, or /* */)
> 
> parentProto := Object clone //makes parentProto a new object
> //:= is used for creating new variables
> parentProto shared := 5 //parentProto's new slot shared holds 5
> parentProto different := 6
> parentProto sum := method(shared + different) //self isn't necessary
> write("parentProto's sum: ", parentProto sum, "\n")
> x := parentProto clone //essentially new instance of parentProto
> y := parentProto clone
> x different = 2 //just updating slots is done with =.
> y different = 3
> write("first x sum ", x sum, "\n",
>       "first y sum ", y sum, "\n")
> parentProto shared = 7 //should show up on all clones
> write("later x sum", x sum, "\n",
>       "later y sum", y sum, "\n")
> 
> Does that illustrate it well? I know the difference between := and =
> is annoying, but you'll get used to it, and it allows really cool
> things to be done with scopes and inheretance.
> 
> Daniel Ehrenberg

After looking at your sample code, I couldn't help but say 'ick'.  Maybe 
it is my C and Python background, but just putting a space between an 
object and its properties looks ugly.  The use of method() also makes my 
skin crawl.

It is cool that you dig on Io, and I wish you the best.

  - Josiah


From peter at engcorp.com  Fri Jan  9 09:42:04 2004
From: peter at engcorp.com (Peter Hansen)
Date: Fri, 09 Jan 2004 09:42:04 -0500
Subject: Debugging Python
References: <mailman.215.1073656414.12720.python-list@python.org>
Message-ID: <3FFEBDBC.2F9DFD03@engcorp.com>

Ashley Lloyd wrote:
> 
> What do people generally use to debug their Python programs? I haven't seen
> anything out there that walks through the code, but perhaps I'm looking in
> the wrong places?

When I need to, which is rare, I either use print statements (a very
solid technology dating from, oh, last century sometime ;-), or the 
Python debugger module: pdb.  

Actually, all I ever do with pdb is this:

   # this is just before the code that I think is failing
   import pdb
   pdb.set_trace()

   # code that I'm about to trace through goes here


And about the only features of pdb I've had to use are "r", "n", and
the ability to inspect arbitrary variables.

I'm not sure about others, but when I design and code using test-driven 
development (TDD), I tend not to need to debug almost ever.  The need
to debug is usually when you aren't sure where a typo, or logic error,
or other mistake has actually occurred.  When using TDD, it's exceedingly
rare that when a test fails, I don't know exactly where the problem is
without having to resort to traditional (slow, tedious, annoying) debugging.

-Peter


From bkelley at wi.mit.edu  Sun Jan 11 16:51:12 2004
From: bkelley at wi.mit.edu (Brian Kelley)
Date: Sun, 11 Jan 2004 21:51:12 GMT
Subject: Python And Internationalization maybe a pre-pep?
In-Reply-To: <m3oetaxjyc.fsf@mira.informatik.hu-berlin.de>
References: <3ffede43$0$563$b45e6eb0@senator-bedfellow.mit.edu>
	<3FFF36A1.40303@v.loewis.de> <YSKLb.10550$5V2.17781@attbi_s53>
	<40011315.7070000@v.loewis.de> <8EeMb.24302$5V2.36981@attbi_s53>
	<m3oetaxjyc.fsf@mira.informatik.hu-berlin.de>
Message-ID: <kzjMb.25401$Rc4.97441@attbi_s54>

Martin v. L?wis wrote:

> I'm uncertain how this relates to the internationalization tables
> you are proposing, but please recognize that a single application
> may have *multiple* such tables, called "textual domains". To
> find a translation, you not only need the message id, but you
> also need the textual domain.

I understand this.  I was just curious whether this should be internal 
or external to python.  Various comments have indicated that it really 
doesn't matter.  This might be a red-herring to the current discussion, 
let's forget that I mentioned parsing at all :)

>>This should tranparent to Gui Widgets and the like so you can place
>>i"Message" in a list box, it will automatically get internationalized
>>but when you get the result of the user selected, it still can be used
>>to dictionary look ups exactly the same as the original i"Message".
> 
> 
> Using what textual domain?

As I understand it, it doesn't matter.  I have been wrong before though. 
  The textual domains are set by setting the locale and what I 
considered the "neat" part was that the dictionary look ups are 
independent of textual domain.  That is, you could switch textual 
domains on the fly and not affect dictionary look-ups.  I don't think 
that with the original gettext system that this would work.  That is as 
I understand it, if you changed the locale you need to call the _() 
function again which means that any previous dictionaries would need to 
be re-created with the new string values.

> xgettext.py already performs very simple parsing of source files,
> to extract messages. Why reinvent the wheel?

I agree with this.  I just initially didn't like the idea of using an 
independent source code analyzer.  Let's assume that I will start with 
xgettext and modify that instead.

>>In either case, I far prefer using internation("This is good") over
>>the _("This is good") function call.
> 
> 
> So do call it internation(), or internationalization() or something
> else. It is just a function:

Ahh, but mine isn't a function, it is a subclass of string.

So my version of gettext, calling
_("Hello")

doesn't return the current localized string, it returns a string object 
that looks up on the fly the current localization for the purposes of 
printing, essentially str operations.

Your comments about looking at the thread state are quite useful, I 
might play with that.

Again, if I am reinventing the wheel on this, I apologize.  And again, 
thanks for bearing with me.

Brian



From LittleDanEhren at yahoo.com  Sat Jan 31 21:35:39 2004
From: LittleDanEhren at yahoo.com (Daniel Ehrenberg)
Date: 31 Jan 2004 18:35:39 -0800
Subject: Python vs. Io
References: <711c7390.0401291301.3f95794@posting.google.com>
	<D6wSb.6538$qU3.576425@news20.bellglobal.com>
	<711c7390.0401301726.3e38da27@posting.google.com>
	<KCESb.6856$qU3.625838@news20.bellglobal.com>
	<711c7390.0401311134.26cd0a11@posting.google.com>
	<CgUSb.46650$mf4.1787735@news20.bellglobal.com>
Message-ID: <711c7390.0401311835.240e6e41@posting.google.com>

> Okay. So, if I set 'self id', like so
> 
>     self id := allocated
> 
> and want to update it later in the same block I can use
> 
>     id = "updated self 'id' slot value"
> 
> But, if I later use
> 
>     id := "set new local 'id' slot value"

Yes, but code like that is confusing and shouldn't be used unless you
need to.
> 
> in the same block I get a new local variable. Is that how it works?
> Or does the first use of a slot determine its assignment scope
> for the duration of the block?
> 
>     self a := "unchanged"
>     a := "changed"
>     write("self a is ", self a)   # changed or unchanged?

unchanged.

If you want to learn more about Io, you should probably join the Io
mailing list instead of bothering the whole usenet thread. Its website
is http://groups.yahoo.com/group/iolanguage/ .

Daniel Ehrenberg


From miki.tebeka at zoran.com  Wed Jan 28 02:44:19 2004
From: miki.tebeka at zoran.com (Miki Tebeka)
Date: 27 Jan 2004 23:44:19 -0800
Subject: Tcl style traces
References: <40171be5$0$1742$5a62ac22@freenews.iinet.net.au>
Message-ID: <4f0a9fdb.0401272344.3464cfd5@posting.google.com>

Hello Derek,

> Does Python have something similar to Tcl style tracing? That is, the
> ability to call a subroutine when a variable is written to or read from?
Not that I know of.

The only way I can think you'll be able to pull this one is by using
pdb.
Just set breakpoints where the variable can change a give as a
condition a function that prints the value of the variable and returns
0.

HTH.
Miki


From pf_moore at yahoo.co.uk  Thu Jan 22 14:08:33 2004
From: pf_moore at yahoo.co.uk (Paul Moore)
Date: Thu, 22 Jan 2004 19:08:33 +0000
Subject: Program Python in VIM
References: <871xpsc5zf.fsf@tulip.whu.ca>
Message-ID: <r7xrvm1a.fsf@yahoo.co.uk>

Peter Wu <peterwu at hotmail.com> writes:

> I'm giving vim a try to program Python. The following are the steps I
> follow to code/test a python program.
>
> vi test.py
> [key in some python code]
> :wq
> :!python test.py
>
>
> Is there any other way? I don't want to type 'python test.py' every time
> I've made any modifications. In Emacs, I can simply fire C-c C-c to fire
> the python interpreter. Thanks!

There's always

:map ^C^C :w^M:!python %^M

which makes C-c C-c write the file and then run it in Python.

Paul.
-- 
This signature intentionally left blank


From martin at v.loewis.de  Mon Jan 19 01:31:31 2004
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Mon, 19 Jan 2004 07:31:31 +0100
Subject: time module question
In-Reply-To: <Xns94752211F12jseale18insightbbcom@204.127.204.17>
References: <Xns94752211F12jseale18insightbbcom@204.127.204.17>
Message-ID: <buftk3$r62$02$2@news.t-online.com>

Jeff Seale wrote:
> How would one go about writing a program which included a clock that 
> updated itself? Right now I'm able to display the time in a text widget in 
> the window but I can't get it to update.

In your GUI library, find the mechanism to produce delayed/timed events.
Then, in the event callback, update the text of the widget.

Regards,
Martin



From sombDELETE at pobox.ru  Mon Jan 19 16:38:51 2004
From: sombDELETE at pobox.ru (Serge Orlov)
Date: Tue, 20 Jan 2004 00:38:51 +0300
Subject: stack-like file object
References: <400be8f3_2@nova.entelchile.net>
Message-ID: <buhip7$5bt$1@nadya.doma>


"Rodrigo Benenson" <rodrigob at elo.utfsm.cl> wrote in message news:400be8f3_2 at nova.entelchile.net...
> Hi,
> I need to implement a stack on a file.
> The idea is to have a big list, and put part of his head on the disk. The
> model of access to the file is like a stack (read in order only the tail,
> write only at the tail).
Why don't you use a collection of file organized as stack in one directory
or in many directories if your underlying file system cannot effectively
support many files in one directory. If your pickles are small (much less
than block size of the file system) you can keep several of them in one
file about the size of the block size. Since the files will be small you can
simply rewrite them competely each time you need change them.

-- Serge.




From mnations at airmail.net  Tue Jan 27 13:43:04 2004
From: mnations at airmail.net (Marc)
Date: 27 Jan 2004 10:43:04 -0800
Subject: Confusing problem between Tkinter.Intvar() and self declared
	variable class
References: <4378fa6f.0401261709.664ca799@posting.google.com>
	<bv5bvo$k0h$03$1@news.t-online.com>
Message-ID: <4378fa6f.0401271043.5183d0c3@posting.google.com>

Thanks Peter. That worked great! I was able to shoe horn that into my
main program with hardly any changes at all, and it was exactly what I
was looking for.

I was afraid my post was a little confusing, so I started another
thread on the general subject of Tk support for pickling. But
basically you answered both questions with one shot.

Thanks again,
Marc


From theller at python.net  Thu Jan 29 09:59:49 2004
From: theller at python.net (Thomas Heller)
Date: Thu, 29 Jan 2004 15:59:49 +0100
Subject: crc-16
References: <ec254e04.0401290526.89bced6@posting.google.com>
	<40191E1D.D912C1BB@engcorp.com>
Message-ID: <1xpihkbe.fsf@python.net>

Peter Hansen <peter at engcorp.com> writes:

> eugene wrote:
>> 
>> I looked for a crc-16(crc 16) function to use but couln't find one
>> that worked:
>> 
>> This one is working ..
>> 
>>         def crc16(s):
> [snip]
>
>
> Since eugene started the thread, I'll continue it by posting one that we've
> been using.
[code snipped]

Since you didn't post the unit tests, the code seems incomplete.
>From a TDD kind of view, at least.  I'm disappointed of you <wink>.

Thomas


From godoy at ieee.org  Thu Jan 15 08:21:14 2004
From: godoy at ieee.org (Jorge Godoy)
Date: Thu, 15 Jan 2004 11:21:14 -0200
Subject: wxwindows question
References: <mailman.320.1074000727.12720.python-list@python.org>
Message-ID: <angid1-jb4.ln1@wintermute.g2ctech>

On Tuesday 13 January 2004 11:31 Jason Tesser wrote in
<mailman.320.1074000727.12720.python-list at python.org>:

> I am looking into using wxwindows for a gui to develop applications.
> The
> Apps need to be cross-platform Mac, Windows, Linux. I work
> For a bible college and will be developing applications ranging from
> online
> Registration to business office software.  My question is what is
> your guys
> Experiences with wxwindows/python?  What is the best tool that is
> stable
> I can use?  I am looking into using wxDesigner with maybe Wing or
> Komodo.
> What do you guys think?

I'm used to use wxGlade to create GUIs, but you can do it with other
tools as well. A friend of mine likes more BOA Constructor. But my
development platform is Linux...

With regards to wxPython, I'm all for it. This a very good GUI and the
fact of it having native look on the OSs you cited above is a plus:
users won't be surprised with a new look in your application and
everything will be where they are used to get it. 

You can take a look at GNUMed for a nice design using wxPython.


See you,
-- 
Godoy.     <godoy at ieee.org>


From aa at bb.cc  Tue Jan 27 10:31:24 2004
From: aa at bb.cc (Ladvánszky Károly)
Date: Tue, 27 Jan 2004 15:31:24 GMT
Subject: Problem with RE matching backslash
References: <7b5e60b8754ab5afcea58d4ecc8b8849@news.meganetnews.com>
	<bv60fk$lu8$05$1@news.t-online.com>
Message-ID: <9114f8b2d460bc916150d0ae96a69ea7@news.meganetnews.com>

Thanks for your quick and very helpful reply, Peter.
What is still not clear to me is why  the search examples work and yield
'm'.

K?roly




From jacek.generowicz at cern.ch  Tue Jan 13 06:15:28 2004
From: jacek.generowicz at cern.ch (Jacek Generowicz)
Date: 13 Jan 2004 12:15:28 +0100
Subject: Python Optimization
References: <84fc4588.0401130249.e6ad2bf@posting.google.com>
Message-ID: <tyfad4sdrqn.fsf@pcepsft001.cern.ch>

pythonguy at Hotpop.com (Anand Pillai) writes:

> Interesting article in Kansas State University website
> on Python internals. Thought I should post it here.
> 
> http://www.cis.ksu.edu/VirtualHelp/Info/develop/cmu-user.info.Source_Optimization.html

Methinks you are confusing Python (the language created by Guido van
Rossum) with Python (the compiler of the CMUCL implementation of
Common Lisp).


Let's play spot-the-python:

  [xxx jacek] cmucl
  CMU Common Lisp 18e-small, running on xxx
  With core: /afs/cern.ch/sw/lisp/i386_linux24/cmucl-18e-small/lib/cmucl/lib/lisp.core
  Dumped on: Mon, 2003-12-01 12:51:47+01:00 on vmetrt1
  See <http://www.cons.org/cmucl/> for support information.
  Loaded subsystems:
      Python 1.1, target Intel x86
      CLOS 18e (based on PCL September 16 92 PCL (f))
  * 


From ramen at lackingtalent.com  Thu Jan 22 02:24:49 2004
From: ramen at lackingtalent.com (Dave Benjamin)
Date: Thu, 22 Jan 2004 07:24:49 -0000
Subject: Does anyone else not find the fun in programming...?
References: <d232c5e.0401130823.27fd26ff@posting.google.com>
	<4004f5ac$0$69931$edfadb0f@dread12.news.tele.dk>
	<slrnc0jc91.75d.ramen@lackingtalent.com>
	<400a7a92$0$205$edfadb0f@dread12.news.tele.dk>
	<slrnc0loum.u28.ramen@lackingtalent.com>
	<400bcb2b$0$180$edfadb0f@dread12.news.tele.dk>
Message-ID: <slrnc0uv6o.pop.ramen@lackingtalent.com>

In article <400bcb2b$0$180$edfadb0f at dread12.news.tele.dk>, Max M wrote:
> Dave Benjamin wrote:
> 
>> So, a data-flow style more or less... that seems to be a useful model for
>> music software. Have you ever played around with Max?
> 
> No. I tried c-sound, and while it was interesting, it was really 
> cumbersome at the level I am interested in.

Yeah, CSound is theoretically amazing but practically useless for me. ;) But
I've had a few friends swear by it. I played around with Max a little bit in
an electronic studio class, and found it very interesting. It's the only
thing I've ever seen that was worthy of the name "graphical programming
languaeg". A language you could program in entirely with a mouse, and it was
actually useful. My teacher used it to do MIDI routing and later to create
an algorithmic music installation in a musem.

For the sake of keeping this on-topic, and because it actually sounds like a
neat idea, I think it'd be cool to develop something like Max (or jMax - is
that project still alive?) for Python. What's the best way of interfacing
Python with real-time MIDI?

>> Yeah, makes perfect sense to me. Do you have any Python-generated songs
>> available? Sounds really cool.
> 
> Nothing I will release. Mostly pre-studies.

Hehe...

>> The thing I was working on was a probabilistic beat generator, based on
>> statistics of when a certain drum would hit in a beat for a selection of hip
>> hop songs. I was trying to capture the "feel" rather than the exact sequence
>> of sounds.
> 
> That is a good way to go. Bayes networks for rythmical patterns.

Interesting idea.

-- 
.:[ dave benjamin (rameny sp00) -:- spoomusic.com -:- ramenfest.com ]:.
: d r i n k i n g   l i f e   o u t   o f   t h e   c o n t a i n e r :


From nathan at visi.com  Tue Jan 13 20:20:26 2004
From: nathan at visi.com (Nathan Mates)
Date: 14 Jan 2004 01:20:26 GMT
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
Message-ID: <4004995a$0$539$a1866201@newsreader.visi.com>

In article <bu0k7e$bvkci$1 at ID-207230.news.uni-berlin.de>,
Brandon J. Van Every <try_vanevery_at_mycompanyname at yahoo.com> wrote:
>I'm also starting to downright despise Linuxers.  If I see another
>project that's "cross-platform, so long as your platform is Linux,"
>I'm going to cut someone's head off.

   While I agree with that statement in the abstract (and can remember
when it was SunOS being the platform of choice), I would like to point
out that FreeBSD has reached over 10,000 ports. (See the counter at
http://www.freshports.org/categories.php ) For those that don't run
FreeBSD (or *BSD in general), a port is a piece of software designed
to be built completely from source on a local machine. Packages are
pre-built binaries. So, it the fine FreeBSD folks can manage to make
"Linux-only" apps build fine from source, maybe you can too.

   The rest of your pissy "I can't CVS commit back" comments, well,
start your own darn project on http://sourceforge.net/ . Once it's
available for others, it's got a chance of being used widely. But, I
suspect your motive was to be a freeloader and not contribute back.

Nathan Mates

--
<*> Nathan Mates - personal webpage http://www.visi.com/~nathan/  
# Programmer at Pandemic Studios -- http://www.pandemicstudios.com/
# NOT speaking for Pandemic Studios. "Care not what the neighbors
# think. What are the facts, and to how many decimal places?" -R.A. Heinlein


From mwh at python.net  Wed Jan 14 06:30:26 2004
From: mwh at python.net (Michael Hudson)
Date: Wed, 14 Jan 2004 11:30:26 GMT
Subject: Division oddity
References: <ssn3009029rrug3l8dk1pn06tqd019ucld@4ax.com>
	<7xeku5vrn8.fsf@ruckus.brouhaha.com>
	<cdm7005r12o3o3f6gngj8no1qh74ul3733@4ax.com>
	<400413E0.5C691A56@engcorp.com>
	<m3hdyzyg96.fsf@pc150.maths.bris.ac.uk>
	<4004452C.47DB4C4@engcorp.com>
Message-ID: <m3vfnewywd.fsf@pc150.maths.bris.ac.uk>

Peter Hansen <peter at engcorp.com> writes:

> Michael Hudson wrote:
> > 
> > Peter Hansen <peter at engcorp.com> writes:
> > 
> > > Tim Rowe wrote:
> > > >
> > > > Well, the documentation for "input()" says "Equivalent to
> > > > eval(raw_input(/prompt/))". Perhaps it should say "/Usually/
> > > > equivalent...."
> > >
> > > I remember reading that too, and just assumed that at this point
> > > it was in fact *implemented* that way, as a simple alias.  Maybe
> > > it should be...
> > 
> > http://www.python.org/sf/876178
> > 
> > Ideas on how to write a testcase welcome.
> 
> Are there any test cases which verify behaviour both in the presence
> and absence of certain "from __future__ import" statements?

Yes.

> My first thought would have been simply to write two test files,
> one of which imports from __future__ and the other which does not,
> and check that in both cases input(x) == eval(raw_input(x)).  
> 
> Or is the issue how to test when the input comes from stdin?  In
> that case, doesn't faking sys.stdin work as usual?

Oh, probably...

Cheers,
mwh

-- 
  I'll write on my monitor fifty times 'I must not post self-indulgent
  wibble nobody is interested in to ucam.chat just because I'm bored
  and I can't find the bug I'm supposed to fix'.
                                            -- Steve Kitson, ucam.chat


From rick_muller at yahoo.com  Tue Jan 13 11:44:41 2004
From: rick_muller at yahoo.com (Rick Muller)
Date: 13 Jan 2004 08:44:41 -0800
Subject: Python bindings for the Gnu Multiprecision library
Message-ID: <5eb8fb88.0401130844.6054b2d7@posting.google.com>

I just discovered the python bindings for the Gnu Multiprecision
library available at http://gmpy.sf.net. The release notes say that it
only works for Python 2.3, but I successfully got it to work on Python
2.2. Way, way cool.


For example, the following is an implementation of the Lucas-Lehmer
test for Mersenne primes:

def lucas(p):
    "Test whether 2^p-1 is a Mersenne prime"
    s = 4
    val = pow(2,p)-1
    for i in range(3,p+1): s = (s*s-2)%val
    return not s 

Using normal python long integers, this routine is an interesting toy,
but not much else. However, with the gmpy libraries, you can grind
away until your Powerbook G4 burns your lap:

def lucas_gmp(p):
    "Test whether 2^p-1 is a Mersenne prime"
    from gmpy import mpz
    s = mpz('4')
    val = pow(2,p)-1
    for i in range(3,p+1): s = (s*s-2)%val
    return not s 

Way to go, Alex and Gustavo (and anyone else involved)!


From claird at lairds.com  Sun Jan 18 16:34:41 2004
From: claird at lairds.com (Cameron Laird)
Date: Sun, 18 Jan 2004 21:34:41 -0000
Subject: Fw: PDF library for reading PDF files
References: <mailman.464.1074430854.12720.python-list@python.org>
	<Xns9474CBDE9B2D7cpl19ghumspamgourmet@62.153.159.134>
Message-ID: <100luvhbh3vr75d@corp.supernews.com>

In article <Xns9474CBDE9B2D7cpl19ghumspamgourmet at 62.153.159.134>,
Harald Massa  <cpl.19.ghum at spamgourmet.com> wrote:
>> I am looking for a library in Python that would read PDF files and I
>> could extract information from the PDF with it. I have searched with
>> google, but only found libraries that can be used to write PDF files. 
>
>reportlab has a lib called pagecatcher; it is fully supported with python, 
>it is not free.
>
>Harald

ReportLab's libraries are great things--but they do not "extract
information from the PDF" in the sense I believe the original
questioner intended.  As Andreas suggested, he's probably best
off using existing stand-alone applications as separate processes,
controlled from Python.
-- 

Cameron Laird <claird at phaseit.net>
Business:  http://www.Phaseit.net


From peter at engcorp.com  Mon Jan 12 09:26:35 2004
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 12 Jan 2004 09:26:35 -0500
Subject: Debugging Python
References: <mailman.215.1073656414.12720.python-list@python.org>
	<3FFEBDBC.2F9DFD03@engcorp.com>
	<xqxllohbejp.fsf@cola2.ca.boeing.com>
	<3fffbe99.486050433@news.blueyonder.co.uk>
Message-ID: <4002AE9B.C51448FB@engcorp.com>

Alan Gauld wrote:
> 
> On Fri, 9 Jan 2004 10:29:46 GMT, Harry George
> <harry.g.george at boeing.com> wrote:
> > > I'm not sure about others, but when I design and code using test-driven
> > > development (TDD), I tend not to need to debug almost ever.
> 
> > told him almost exactly what you said: If you are doing test-based
> > (whether or not it is with someojne else and thus Agile), you don't
> > get into those grim debug sessions that are part of life in C/C++
> > land.
> 
> Interesting comments. How do people generally perform these tests
> then? My primary test tool, for low level testing, is usually the
> debugger. Batch mode debugging is something I've been doing since
> I worked on VAX/VMS systems and its seems as natural as breathing
> to me. Its easy to save a test session and run it later etc. How
> else do you test code at a low level?
> 
> Or does using the debugger as a test harness not count as
> debugging?

The debugger-as-test-harness does not count as testing, anyway, at
least not in the Agile sense.  The tests *must* be automated, and
run very frequently (constantly) or you can't be very agile.

As others have said, the unittest is the key (in Python) or at least
the de facto standard.  I would not agree that using it is "tedious"
at all, however, as it takes me only about twenty seconds to start a
new test file and that's *without* using a template.  Running the tests
is also not tedious, at least not if you invest a few hours in a 
simple utility that automates even the run-all-tests functionality.
I just type "unit -a" and all tests in all subfolders are immediately
run, without output going to a log file for later analysis in case
there are failures.

-Peter


From luszczek1 at yahoo.com  Sat Jan 10 12:25:49 2004
From: luszczek1 at yahoo.com (Piotr Luszczek)
Date: Sat, 10 Jan 2004 09:25:49 -0800 (PST)
Subject: Bruce Eckel example / CGI server for localhost for Windows XP
	possible?
In-Reply-To: <cb035744.0401090507.2802a281@posting.google.com>
Message-ID: <20040110172549.5263.qmail@web60902.mail.yahoo.com>


--- Will Stuyvesant <hwlgw at hotmail.com> wrote:
> Is there anybody who can provide simple example code
> like found in
> Fredrik Lundh's Python Standard Library book for
> setting up a CGI
> server for localhost with Python?  Perhaps the
> examples that are
> available work on linux, but not on my Windows XP
> laptop with Python
> 2.3.3: GET works and the first POST works too,
> subsequent POSTs crash.

This is simple:
http://www.geocities.com/luszczek1/httpd_py.html

and seems to work with multiple POSTs. But it doesn't
seem to be able to handle file upload correctly. At
least as this script is concerned:
def main():
    form = cgi.FieldStorage()

    fc = form.getvalue("fc", "")

    print "Content-type: text/html\r\n\r\n",
    print "<html><body>"

    if fc:
        print "File", repr(fc), str(dir(fc))
        fc = form["fc"]
        print "<pre>"
        print fc.file.value
        print "</pre>"

__________________________________
Do you Yahoo!?
Yahoo! Hotjobs: Enter the "Signing Bonus" Sweepstakes
http://hotjobs.sweepstakes.yahoo.com/signingbonus



From michele.simionato at poste.it  Mon Jan 12 10:41:19 2004
From: michele.simionato at poste.it (Michele Simionato)
Date: 12 Jan 2004 07:41:19 -0800
Subject: slots  , setattr,   metaclass
References: <mailman.287.1073894630.12720.python-list@python.org>
Message-ID: <95aa1afa.0401120741.6a7ae7c9@posting.google.com>

"Roman Yakovenko" <roman.yakovenko at actimize.com> wrote in message news:<mailman.287.1073894630.12720.python-list at python.org>...
> Hi. I have small problem and I don't know solution.
> The problem: every class imported from some module X should not allow to 
> be modified
> ( modified == adding or deleting new class attributes ). 

I think you may be interested in this recipe:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/252158

(uses setattr, metaclasses, no slots).


    Michele


From giles_brown at hotmail.com  Mon Jan 26 15:45:00 2004
From: giles_brown at hotmail.com (Giles Brown)
Date: 26 Jan 2004 12:45:00 -0800
Subject: python service running on Win Xp,
	but failing on Win NT Workstation :(
References: <bv3bs0$la0$1@atlantis.news.tpi.pl>
Message-ID: <57de9986.0401261245.461e481@posting.google.com>

"Ringwraith" <lubowiecka at go2.pl> wrote in message news:<bv3bs0$la0$1 at atlantis.news.tpi.pl>...
<snip>
> "The Purge Log Files Service service failed to start due to the following
> error:
> The service did not respond to the start or control request in a timely
> fashion.
> 
> Timeout (120000 milliseconds) waiting for service to connect. "
> 
> 
> 
> Any ideas what could caused the problem?

No idea what caused the problem.  I would suggest you "import win32traceutil",
stick some print statements in early on in your code and start the
"Trace Collector Debugging tool" from the Tools menu of PythonWin.

Hth,
Giles


From crap at crud.com  Sat Jan 10 04:30:48 2004
From: crap at crud.com (Moosebumps)
Date: Sat, 10 Jan 2004 09:30:48 GMT
Subject: Setting up test for XML-RPC
Message-ID: <cDPLb.2260$nl3.2178@newssvr29.news.prodigy.com>

I'm trying to test out Python XML-RPC for the first time, and can't find
anything that executes a call end to end.

I thought that I would use SimpleXMLRPCServer to run a simple server on
localhost, and xmlrpclib to run a client that connects to it, but they don't
seem to register the same functions.  The server test code registers 'pow'
and 'add' (in the Python 2.3 distribution) but the client seems to call
"print server.examples.getStateName(41)".  It doesn't seem like they were
meant to work together as a unit test, although that would seem logical.

Can anyone help me just get a single XML-RPC call to execute (and I want to
see both the client and server code)?  I have googled extensively and
haven't come up with anything.

Also -- I'm investigating this for a nightly build process involving many
machines.  There is going to be a master machine that sends requests to 20
other machines to build things.  They're just a bunch of Windows XP
machines, with almost no software on them.  What software would I need to
install to run XML-RPC servers on them to receive requests?  Just Python and
a web server like Apache?

If there are any other _very_ lightweight RPC mechanisms, I would appreciate
hearing about them.  I am writing some build scripts in Python, and while I
could for example schedule a task on 20 machines separately, it would be
nicer to have a master machine control when the build happened, etc. and be
able to manage dependencies by waiting for a return result, etc.  All I want
to do is execute a python function on a remote machine and get a result
back.  It is all done in a local, secure environment.

Thanks for all the previous responses to my questions -- this newsgroup has
been very helpful.

MB




From slukas5 at poczta.onet.pl  Thu Jan 15 06:46:07 2004
From: slukas5 at poczta.onet.pl (slukas)
Date: Thu, 15 Jan 2004 12:46:07 +0100
Subject: MySQLdb
Message-ID: <bu5uhr$t4$1@news.onet.pl>

Hello
Sorry for my English.
I want add the new record to Mysql database. When I use my script I got 
an exception "UnicodeEncodeError: 'ascii' codec can't encode character 
u'\xe4' in position 12: ordinal not in range(128).
When I add line
sys.stdout = codecs.lookup('utf-8')[-1](sys.stdout)
to my script i see the var on the screen but I can't add var to database.

Any idea?
Thanks!
Lukas



From ykingma at accessforall.nl  Mon Jan  5 16:24:25 2004
From: ykingma at accessforall.nl (Ype Kingma)
Date: Mon, 05 Jan 2004 22:24:25 +0100
Subject: Scoped Lock
References: <bt9ovs$p92$1@graf.cs.uni-magdeburg.de>
	<3ff8a259$0$121$e4fe514c@dreader10.news.xs4all.nl>
	<btbhpt$l0l$1@graf.cs.uni-magdeburg.de>
Message-ID: <3ff9d591$0$15165$e4fe514c@dreader14.news.xs4all.nl>

Marco Bubke wrote:

> Ype Kingma wrote:
> 
>> Marco Bubke wrote:
>> 
>>> Hi
>>> 
>>> There is the Lock object in the threading module.
>>> But there is no medode there I could aquire a scoped
>>> lock like:
>>> 
>>> mutex = threading.Lock()
>>> my_lock = mutex.scoped_acquire() # maybe scoped_lock()
>>> #now this stuff is locked
>>> 
>>> del mylock
>>> 
>>> #the lock is released.
>>> 
>>> def do_domething:
>>>   my_lock = mutex.scoped_acquire()
>>>   #now this stuff is locked
>>>   #the lock is released after its out of scope
>>> 
>>> 
>>> I have written this my own but I'm not sure there is a drawback
>>> because its looks so convinent. So I wonder why its not in
>>> the module?
>> 
>> Some reasons:
>> - What should happen when an exception happens during the locked stuff?
>> - It is possible pass a reference to the lock during the locked stuff,
>>   so although the lock goes out of local scope, there still might be
>>   a reference to it.
>> - The moment that __del__() is called is not guaranteed.
>> 
>> You can also do it like this:
>> 
>> mutex = threading.Lock()
>> mutex.acquire()
>> try:
>>     # now this stuff is locked
>> finally:
>>     mutex.release() # explicit is better than implicit
> 
> This does not look nice to me. There should be something me easily.

An elegant and easier way has been designed, see PEP 310,
mentioned in another post in this thread:
http://www.python.org/peps/pep-0310.html

However, one normally does not use locks so often that the
lightly verbose idiom needed to use them becomes a problem.

Regards,
Ype



From no.spam  Sun Jan  4 16:10:12 2004
From: no.spam (Christophe Delord)
Date: Sun, 4 Jan 2004 22:10:12 +0100
Subject: Progress indicator during FTP upload
References: <bt9m62$15te$1@ns.felk.cvut.cz>
Message-ID: <20040104221012.0cc111a3.no.spam@box>

On Sun, 04 Jan 2004 19:31:34 +0100, Frantisek Fuka wrote:

> My application uses ftplib to upload files to remote server. What is
> the cleanest way to provide progress indicator for long files? What
> exactly should I override in the ftplib (I am not very proficient in
> the FTP protocol)?
> 

Hello,

To update my web site I wrote a script in wich I have overriden
ftplib.FTP to print a dot when a block of bytes is sent. Here is my
dot_FTP class :

class dot_FTP(ftplib.FTP):
    def storbinary(self, cmd, fp, blocksize=8192):
        ''' Store a file in binary mode.'''
        self.voidcmd('TYPE I')
        conn = self.transfercmd(cmd)
        while 1:
            buf = fp.read(blocksize)
            if not buf: break
            conn.send(buf)
            sys.stdout.write('.')
            sys.stdout.flush()
        conn.close()
        return self.voidresp()

I just took the code of storbinary in ftplib.py and added the wanted
output.


Christophe.


From eelgueta at navix.cl  Tue Jan 27 17:30:05 2004
From: eelgueta at navix.cl (Eduardo Elgueta)
Date: 27 Jan 2004 14:30:05 -0800
Subject: NEWBIE: What's the instance name?
References: <6q2vuv45lsah3epo9loa7l2tp9517makk4@4ax.com>
	<m3y8svrac3.fsf@pc150.maths.bris.ac.uk>
Message-ID: <3b3f63ed.0401271430.27d9202c@posting.google.com>

Michael and the rest,

Your analogy is very good. I think of C++ as an enigmatic and
temperamental cat, and I think of Python as last generation language.
I mean, it's ok if in C/C++ you can't get an instance name (another
reason not to use it). But why not in Python? (I use it a lot)

An object can have many references to it? Ok, give me the name of the
instance I'm using to refer to it:

  x.__instance_name__ --> "x"
  foo.__instance_name__ --> "foo"

Or the first it finds, if it's not obvious:

  self.__instance_name__ --> whatever it finds first
  (I'll be carful not to referentiate the instance twice, I promise)

I've never ran into a software design/engineering book saying "storing
an instance name is forbidden under penalty of death."

I don't want to flame anyone. It's just I'm so lazy I wanted to save
myself a parameter in my html generation class, using the instance
name as the html object name:

  python:
    pass = Input(...)
    :
    pass.render(page_buffer)

  html:
    :
    <input type="whatever" name="pass" ...>
    :

Oh well!

Regards,

Ed.

Michael Hudson <mwh at python.net> wrote in message news:<m3y8svrac3.fsf at pc150.maths.bris.ac.uk>...
> engsolnom at ipns.com writes:
> 
> > What I'd like to do is display is the instance name. Is it hiding
> > somewhere?
> 
> From http://www.amk.ca/quotations/python-quotes/page-8.html:
> 
>     The same way as you get the name of that cat you found on your
>     porch: the cat (object) itself cannot tell you its name, and it
>     doesn't really care -- so the only way to find out what it's
>     called is to ask all your neighbours (namespaces) if it's their
>     cat (object)...
> 
>     ....and don't be surprised if you'll find that it's known by many
>     names, or no name at all!
> 
>    -- Fredrik Lundh, 3 Nov 2000, in answer to the question "How can I
>       get the name of a variable from C++ when I have the PyObject*?"
> 
> One of my favourite Python quotes...
> 
> Cheers,
> mwh


From aahz at pythoncraft.com  Mon Jan  5 15:40:32 2004
From: aahz at pythoncraft.com (Aahz)
Date: 5 Jan 2004 15:40:32 -0500
Subject: prePEP "Decimal data type" v0.2
References: <mailman.95.1073307795.12720.python-list@python.org>
Message-ID: <btci40$bnm$1@panix3.panix.com>

In article <mailman.95.1073307795.12720.python-list at python.org>,
Batista, Facundo <FBatista at uniFON.com.ar> wrote:
>
>http://www.taniquetil.com.ar/facundo/python/prePEP-Decimal-0.2.html

Overall, looks good.  I think the biggest point of disagreement still is
the behavior of Decimal interacting with floats.  I hope more people
will comment once you get a PEP number.

One major correction: "Rationale" means "reason"; "rational" refers to
fractions.  Several times you use "rationale" when you mean "rational".
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

A: No.
Q: Is top-posting okay?


From james at eccehomo.co.uk  Wed Jan 14 16:41:26 2004
From: james at eccehomo.co.uk (James Goldwater)
Date: Wed, 14 Jan 2004 21:41:26 +0000
Subject: wxPython worries
In-Reply-To: <9d1c4d6d.0401141221.22c587f5@posting.google.com>
References: <mailman.352.1074092092.12720.python-list@python.org>
	<9d1c4d6d.0401141221.22c587f5@posting.google.com>
Message-ID: <4005B786.6000805@eccehomo.co.uk>

It's not the RADdish-ness (is that a word?) - drag'n'drop, property 
assignment etc - that concerns me, it's the ease of gui building - by 
hand is fine (oh how I've come to 'love' Java's layout managers...)

Custom controls is the biggie then. I think I'll have a punt at building 
a custom control in wxPython to see if it's even feasible.  Anybody want 
an arbitrary-angled triangular-wedge button?  (My first custom control 
in Delphi version 1, all those years back...)

PT wrote:
>>What worries me is wxPython: 
>>I'm also 
>>unclear as to how easy custom controls are to build.
> 
> 
> None of the Python GUI toolkits support making good custom controls as
> well as Java and .NET do.  TKinter is probably the best Python option
> for that.  If you are comfortable with Windows programming though,
> wxPython will not be too difficult.
> 
> 
>>Am I just being confused by my newbie-ness, or are my initial concerns 
>>justified?  What's anybody else's experiences with gui programming in 
>>wxPython like vs a RAD like Delphi or .NET?
> 
> 
> If you want something similar to Delphi or .NET, then you would
> probably like QT Designer much better than the wx options.  See
> BlackAdder (Win, $$) or eric3 (Linux, free):
> http://www.thekompany.com/products/blackadder/
> http://www.die-offenbachs.de/detlev/eric3.html
> 
> If money isn't an issue though, just stick with Visual Studio and C#
> and let the other guy do most of the work.

-- 
James Goldwater
I.T. Consultant
020 8949 7927 (mobile 078 999 55 265)

GPG Key: A2137B98 (pgp.mit.edu)




From robin at jessikat.fsnet.co.uk  Fri Jan  9 09:30:47 2004
From: robin at jessikat.fsnet.co.uk (Robin Becker)
Date: Fri, 9 Jan 2004 14:30:47 +0000
Subject: Twisted or Medusa or Zope
References: <425cc8d1.0401070808.14690325@posting.google.com>
	<y11Lb.1333$Mb5.23891@news2.e.nsc.no> <3FFD7159.55630AE0@engcorp.com>
	<6AlLb.134$hd.7718@news2.e.nsc.no> <3FFEB6D6.BF92551E@engcorp.com>
Message-ID: <+vXesJAXsr$$EwJL@jessikat.fsnet.co.uk>

In article <3FFEB6D6.BF92551E at engcorp.com>, Peter Hansen
<peter at engcorp.com> writes
..
...
>enlighten me.
>
>Thomas, you're completely ON track here... I just wanted to emphasize that
>Twisted is much more polished and sophisticated.  I'd even have to say, 
>as a programmer using them, that Twisted does actually provide a simpler and 
>cleaner API.  It and Medusa are much closer in concept than either is to
>Zope, though, as you say.
>
>-Peter
In another thread http://snakelets.sf.org was mentioned.
-- 
Robin Becker


From Yomanium at Yomanium.com  Thu Jan 15 09:08:42 2004
From: Yomanium at Yomanium.com (Yomanium Yoth Taripoät II)
Date: Thu, 15 Jan 2004 15:08:42 +0100
Subject: TUPLE & LIST
Message-ID: <%7xNb.55$Uw3.50@newsr2.u-net.net>

HI,

1) what are the differences between list and tuple?
2) how to concatenate tuple and list? no method, no op?rator?
3) im looking the fucking manual, and cant add value in my tuple, when it
already created :/
  how to do it?

thx.






From adonisv at REMOVETHISearthlink.net  Sun Jan  4 16:25:11 2004
From: adonisv at REMOVETHISearthlink.net (Adonis)
Date: Sun, 04 Jan 2004 21:25:11 GMT
Subject: Tkinter.Menu() Question
References: <4a_Jb.8099$6B.48@newsread1.news.atl.earthlink.net>
	<bt9v6d$s3n$07$1@news.t-online.com>
Message-ID: <Xw%Jb.8263$6B.6442@newsread1.news.atl.earthlink.net>

"Peter Otten" <__peter__ at web.de> wrote in message
news:bt9v6d$s3n$07$1 at news.t-online.com...
> Adonis wrote:
>
> > I wish to create a popup menu from a list, when it is created they all
> > show the same label from the list:
> >
> > Months = [0, 'January', 'February', 'March', 'April', 'May', 'June',
> >             'July', 'August', 'September', 'October', 'November',
> > 'December']
> >
> > def _Menu_Click(self, month):
> >     print month
> >
> > menu = Menu(fraMain, tearoff=0)
> >
> > for Month in Months[1:]:
> >     menu.add_command(label=Month, command=lambda : _Menu_Click(Month))
> >
> > When the menu calls _Menu_Click(...) it always prints 'December'
> >
> > Now my understanding is the when an object is created and it is
> > replicated, whichever of the modified replications affects all of the
> > objects, being that they are just mere references to the original (my
> > wording might be off, correct me if I am wrong). How do I avoid this for
> > what I am trying to achieve?
>
> (I made some bogus changes so I could ensure it works)
>
> from Tkinter import *
>
> Months = [0, 'January', 'February', 'March', 'April', 'May', 'June',
>             'July', 'August', 'September', 'October', 'November',
> 'December']
>
> root = Tk()
>
> class DontCare:
>     def _Menu_Click(self, month):
>         print month
> dc = DontCare()
>
> mb = Menubutton(root, text="so what")
> mb.pack()
> menu = mb["menu"] = Menu(mb, tearoff=0)
>
>
> for Month in Months[1:]:
>     menu.add_command(label=Month, command=lambda m=Month:
dc._Menu_Click(m))
>
> root.mainloop()
>
> Note how the instance (dc) is provided with the method (_Menu_Click) in
the
> lambda (in your real code you will most likely have to replace dc with
> self). The real trick is to provide the loop variable Month as the default
> value for m in the lambda. m will be bound to the same string as Month
when
> the lambda is *created*. If you don't do this, the value of the variable
> Month will be looked up when the lambda is *called*, which will be always
> "December" after the for loop is terminated.
>
> Peter

Thanks a million, works like a charm.

Adonis




From aaron at reportlab.com  Mon Jan  5 13:26:20 2004
From: aaron at reportlab.com (Aaron Watters)
Date: 5 Jan 2004 10:26:20 -0800
Subject: ANNOUNCE: xsdb -- the eXtremely Simple Database goes alpha
References: <mailman.25.1071054806.9307.python-list@python.org>
	<c0f3952d.0312290737.685678d6@posting.google.com>
Message-ID: <9a6d7d9d.0401051026.775d9ef3@posting.google.com>

lipp at epost.de (Wolfgang Lipp) wrote in message news:<c0f3952d.0312290737.685678d6 at posting.google.com>...
> hi,
> 
> ....when i create 
> a database, populate it, commit, and then re-open it, i get a nasty
> xsdb.xsdbExceptions.RollBackError....

Thank you very much for finding this problem!

Double apologies: Sorry that I made this bug and sorry that I didn't
respond to your message earlier.  I decided take a different approach
than the one you suggested that fixes the problem systematically (and
required a lot of changes and testing).  

Basically I hadn't considered
the possibility that a program might open two direct connections 
to a database within the same minute (because my machine is so slow :( ).
If you do make very fast connections I added the ability to clear out
all the timestamp information using a special keyword argument to the
connection initializer.  Here is the test case (fastconnect.py):

===
"test connecting and then reconnecting to a database quickly"

def test(filename="data/fastconnect.dat"):
    import time
    now = time.time()
    from xsdb.KISSBaseHierarchy import xsdb
    print "testing fast reconnection"
    connection = xsdb(filename, startup=1)
    t = connection.transaction()
    t.add("object1", "this is the object")
    t.commit()
    t = connection.transaction()
    t.add("object2", "this is the other object")
    t.commit()
    connection = None
    # must clear the connection for fast reconnect!
    connection = xsdb(filename, startup=0, clear=1)
    print "fast reconnect completed in ", time.time()-now

if __name__=="__main__":
    test()
===

If you omit the "clear=1" above you get the exception you reported.

I just uploaded a new file release which includes this and a number
of other bugfixes, enhancements, doc changes, etcetera.  Get it at:

http://xsdb.sourceforge.net

  -- Aaron Watters

===
You can't talk to a man
When he don't wanna understand  -- Carole King


From mcfletch at rogers.com  Sun Jan  4 16:30:50 2004
From: mcfletch at rogers.com (Mike C. Fletcher)
Date: Sun, 04 Jan 2004 16:30:50 -0500
Subject: Launching pdb from within a script
In-Reply-To: <bt9t94$q60$07$1@news.t-online.com>
References: <UNYJb.14065$Od5.5161@news-binary.blueyonder.co.uk>	<bt9mhl$9k2$06$1@news.t-online.com>	<MHZJb.14962$Od5.2841@news-binary.blueyonder.co.uk>	<bOZJb.15107$Od5.11731@news-binary.blueyonder.co.uk>
	<bt9t94$q60$07$1@news.t-online.com>
Message-ID: <3FF8860A.4070509@rogers.com>

Peter Otten wrote:

>Graham Nicholls wrote:
>  
>
...

>>But pdb complains that there are no such variables.  It may be that I had
>>to add some incantation around the script startup - I just can't remember
>>(and its frustrating!).
>>    
>>
...

>-> Pdb().set_trace()
>(Pdb) abc
>*** NameError: name 'abc' is not defined
>(Pdb) u
>  
>
This is the key line, 'n' would work as well.  The reason your variables 
weren't being found is that you were still inside the call to 
set_trace().  You need to return from that (either by going "u"p to the 
calling context, or to the "n"ext instruction, which returns to the 
calling context by finishing the set_trace() call).

Enjoy,
Mike

_______________________________________
  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://members.rogers.com/mcfletch/






From mcherm at mcherm.com  Fri Jan 30 10:06:21 2004
From: mcherm at mcherm.com (Michael Chermside)
Date: Fri, 30 Jan 2004 07:06:21 -0800
Subject: [Python-Dev] PEP 327: Decimal Data Type
Message-ID: <1075475181.401a72ed15fc5@mcherm.com>

Facundo Batista writes:
> I'm proud to announce that the PEP for Decimal Data Type is now published 
>         http://www.python.org/peps/pep-0327.html 

VERY nice work here.

Here's my 2 cents:

    (1) You propose conversion from floats via:
      Decimal(1.1, 2) == Decimal('1.1')
      Decimal(1.1, 16) == Decimal('1.1000000000000001')
      Decimal(1.1) == Decimal('110000000000000008881784197001252...e-51')

        I think that we'd do even better to ommit the second use. People who 
really want to convert floats exactly can easily write "Decimal(1.1, 60)". But 
hardly anyone wants to convert floats exactly, while lots of newbies would 
forget to include the second parameter. I'd say just make Decimal(someFloat) 
raise a TypeError with a helpful message about how you need that second 
parameter when using floats.

    (2) For adding a Decimal and a float, you write:
I propose to allow the interaction with float, making an exact conversion and 
raising ValueError if exceeds the precision in the current context (this is 
maybe too tricky, because for example with a precision of 9, Decimal(35) + 1.2 
is OK but Decimal(35) + 1.1 raises an error).

        I suppose that would be all right, but I think I'm with Aahz on this 
one... require explicit conversion. It prevents newbie errors, and non-newbies 
can provide the functionality extremely easily. Also, we can always change our 
minds to allow addition with floats if we initially release with that raising 
an exception. But if we ever release a version of Python where Decimal and 
float can be added, we'll be stuck supporting it forever.


Really, that's all I came up with. This is great, and I'm looking forward to 
using it. I would, though, be interested in a couple more syntax-related 
details:
    (a) What's the syntax for changing the context? I'd think we'd want 
a "pushDecimalContext()" and "popDecimalContext()" sort of approach, since most 
well-behaved routines will want to restore their caller's context.
    (b) How about querying to determine a thread's current context? I don't 
have any use cases, but it would seem peculiar not to provide it.
    (c) Given a Decimal object, is there a straightforward way to determine its 
coefficient and exponent? Methods named .precision() and .exponent() might do 
the trick.

-- Michael Chermside



From bkelley at wi.mit.edu  Thu Jan 15 10:45:52 2004
From: bkelley at wi.mit.edu (Brian Kelley)
Date: Thu, 15 Jan 2004 10:45:52 -0500
Subject: Why gmp is not in the standard library?
In-Reply-To: <m3hdyxv1mp.fsf@pc150.maths.bris.ac.uk>
References: <4f0a9fdb.0401150211.615a7f45@posting.google.com>
	<m3hdyxv1mp.fsf@pc150.maths.bris.ac.uk>
Message-ID: <4006b54e$0$560$b45e6eb0@senator-bedfellow.mit.edu>

Michael Hudson wrote:
> miki.tebeka at zoran.com (Miki Tebeka) writes:
> 
> 
>>Hello All,
>>
>>On a different thread Skip wrote:
>>
>>>Yes, you're right.  Starting at 2**1000 I found three safe primes quite
>>>quickly.  Using my version I gave up waiting after seeing one safe prime
>>>float by.
>>
>>Which made me think why Python don't use gmp as it's primary math
>>package - we'll get fast results, a lot of number types and much more.
>>
>>Can't think of any reason why Python is implementing its own long
>>numbers...

This discussion partly happened a couple of years ago when mxNumber was 
released from egenix.  Here is a google link:

http://mail.python.org/pipermail/python-list/2001-April/040453.html

>>Can you enlighten me?
> 
> 
> Licensing?  IIRC, GMP is GPL.

So is bsddb and that is included with python.  Anyway, gmp is LGPL'd not 
GPL'd.

> Also, possibly, portability.

GMP is incredibly portable, it does have one large flaw for use with python:

  Q:  I get a Segfault/Bus error in a program that uses GMP to calculate 
numbers with several hundred thousand digits. Why?

A: GMP allocates most temporaries on the stack, and some machines give 
user programs very little stack space by default. See setrlimit(2) for 
information on how to increase the stack allocation. You can also change 
it from the shell (using ulimit or limit depending on the shell). You 
can also configure with --disable-alloca to instead allocate temporaries 
using malloc, but that will make the library run somewhat slower.

Brian



From here at there.org  Sun Jan  4 06:32:11 2004
From: here at there.org (The_Incubator)
Date: Sun, 04 Jan 2004 03:32:11 -0800
Subject: Scripting C++ Game AI object using Python Generators
Message-ID: <bt8tk4$bnu$1@news.service.uci.edu>

As the subject suggests, I am interested in using Python as a scripting 
language for a game that is primarily implemented in C++, and I am also 
interested in using generators in those scripts...

Initially I was justing looking at using Python for some event 
scripting. So basically an event would trigger an object to run the 
appropriate Python script, which would be run in it's entirety and 
return control to the C++ code.

After looking at the Python docs and a few articles I've found, I'm 
really excited by the idea of using Python generators as micro-threads 
for game AI. I've been playing around writing play Python applications 
with classes that use generators as update methods, and it's cool as 
hell. I've also managed to write a C++ program with an embedded Python 
interpreter than runs a script, and I've used the Boost Python library 
to expose some C++ functions to Python.

Where I would like to go from there is to be able to associate a Python 
script with a C++ object, so that on every frame update I could run the 
Python script (which would have functionality implemented as a 
generator) until it yields, then move on to updating the next object, 
and on the next frame, have the generator continue from where it left off.

I haven't really attempted this yet, because I'm not quite sure where to 
start. I'm not sure how to have a Python script persistently attached to 
a C++ object so that execution can be returned to C++ from a yield and 
continue where it left off on the following update cycle. I am beginning 
to suspect, based on the docs and articles I've read, that to get this 
sort of functionality I should be looking at exporting all my C++ 
objects to Python, and then using Python as the glue to write the main 
loop of the application, calling out to the C++ objects as required. Is 
this assumption correct, or can I get the functionality I want while 
still keeping this a C++ application? Should I be looking at writing the 
AI modules as Python objects and attaching these to my C++ objects at 
runtime?

Initially I was just looking for something to use for simple scripting, 
and we were planning to do a custom scripting language, but I know just 
enough about language design and implementation to be very weary of 
having to maintain our own language when there are proven embeddable 
languages out there than are more powerful (and if I wanted to stick 
with simple I'd use Lua, which was just a breeze to embed). But the more 
I look at Python, the more ambitious I'm getting about how much we could 
potentially do by using Python at least as a scripting language and 
possible as glue... however, I'm not necessarily sure we need all this 
functionality (generators included), but that doesn't mean I don't want 
it, and I do like the idea of having more power and flexibility than is 
strictly necessary, so that we will have the power to do things we 
didn't necessarily plan for or expect. We are using Gamebryo as our 
rendering library, so that is a major constraint. That is very much a 
C++ library, so this is very much a C++ application. I am also a bit 
concerned about scaring other developers on my team... We need a 
scripting language, and everyone can deal with that as long as we 
pretend that the scripting language is a separate thing for designers, 
but I'm afraid if I start suggesting the programmers write our main 
application in Python and export the C++ code, I'm in danger of becoming 
a heretic ;) I'm not even sure if that's practical, given our C++ 
middleware and performance concerns, but that's why I'm posting here, to 
get some assistance from the experts.

Thanks in advance for any advice
Nick


From jjl at pobox.com  Fri Jan 16 10:53:43 2004
From: jjl at pobox.com (John J. Lee)
Date: 16 Jan 2004 15:53:43 +0000
Subject: I come not to bury C++, but to praise it...
References: <mailman.337.1074032524.12720.python-list@python.org>
	<bu1uul$cam92$1@ID-46268.news.uni-berlin.de>
	<cu%Mb.47396$8H.99443@attbi_s03>
	<bu3khe$dbm5v$1@ID-46268.news.uni-berlin.de>
	<100aq779r2h2c9e@corp.supernews.com>
	<bu3vku$den0t$1@ID-46268.news.uni-berlin.de>
	<8765ferltj.fsf@pobox.com>
	<VHyNb.18534$VS4.570530@bgtnsc04-news.ops.worldnet.att.net>
Message-ID: <87zncnzy7s.fsf@pobox.com>

"Andrew Koenig" <ark at acm.org> writes:

> > The argument runs like this: If you don't have near-100% test
> > coverage, you are missing many bugs that static typechecking will not
> > catch.  So don't do that (the fact that it's perfectly feasible to
> > have near-100% coverage, when given support from bosses where
> > relevant, has been repeatedly demonstrated recently).  OTOH, if you do
> > have 100% coverage, the set of bugs that *are* caught by the static
> > typechecks, but *not* by the tests is usually very small, in practice.
> 
> There is a subtle fallacy in this argument, at least in the context of C++
> and Python, namely that there is a significant category of errors that
> static type checking (as C++ and some other languages do it) can detect but
> can escape even 100% test coverage.

It may be subtle, but it's also the starting point for most of these
debates.


> Before you get out your flame-thrower, please hear me out -- I am not saying

OK... :-)


> that this reasoning applies to all errors, or even a majority of them, but
> only to a significant category.  That category consists of programs where
> the types of key objects are not known when the program is written, but are
> known when the program is compiled.

Agreed.

[...snip example...]
> In practice, C++ programmers often solve such problems by using templates,
> which defer type checking until the last possible moment during the
> compilation process.  In effect, the compiler looks at each call to our
> hypothetical sort function, and verifies that the type assumptions that the
> sort function makes are valid in the context of that particular call.  The
> result is that the compiler can detect type errors that would show up in a
> dynamically typed environment only if the function were tested with the
> specific types that revealed the error.

Yes.


> The price one pays for this extra checking, of course, is that one cannot
> call such a sort function with an argument with a type that is known only at
> run time.  But in practice, there are many cases where being able to defer
> type checking until the end of compilation is just as useful as being able
> to defer it until run time.  I believe that many people who dislike static
> type checking are unaware of this distinction.

I do like static type checking.  I *don't* like the price that C++
makes me pay for it in terms of lines of code and inflexibility.  When
comparing Python and C++, the longer, more inflexible programs
required to solve problems in C++ introduce more bugs than its static
typechecking system removes.  It's a shame some tiny fraction of the
trillion dollars recently allocated to George Bush's electoral
campaign <0.2 wink> can't be diverted to experiments to test this
hypothesis (but I guess those dollars are mostly fictional anyway ;-).

So, I think the various interface proposals that have been made for
Python are interesting.  Also, it seems attractive to have static type
inference wedged into Python somehow (not holding my breath: I don't
even know if that idea really makes any sense in the context of
Python).  But I see Python in its current state as a safer language
than C++.

Alex Martelli goes much further than I do:

http://www.google.com/groups?selm=ft6tb.21351%249_.767461%40news1.tin.it&rnum=1

[...]
> I see static typing
> as a theoretically-interesting field of no real applicability to my
> work.  If I felt otherwise about it, I would most likely be coding
> in Haskell or some kind of ML, of course -- nobody's come and FORCED
> me to choose a dynamically-typed language, you know?

And perhaps he's right: my attraction to static type inference in a
Python-like language is both theoretical and almost maximally vague
(and my grasp of the issues is weaker than Alex's), and I don't have
any decent ML or Haskell experience with to compare with my Python
experience...

See also the couple of posts near this article in the exchange between
Alex and David Abrahams (same one I posted in a followup to Cameron
earlier):

http://www.google.com/groups?selm=pNfIa.206219%24g92.4232233%40news2.tin.it&rnum=2


John


From JimJJewett at yahoo.com  Tue Jan 20 14:10:54 2004
From: JimJJewett at yahoo.com (Jim Jewett)
Date: 20 Jan 2004 11:10:54 -0800
Subject: __init__(self, *args, **kwargs) - why not always?
References: <cab22418.0401191358.297a0415@posting.google.com>
	<mailman.521.1074550438.12720.python-list@python.org>
Message-ID: <cab22418.0401201110.2e73de99@posting.google.com>

I'm still not sure I understand the objection, as I would
still have wanted the extension even in your examples. 

So I've gone into a bit more detail, and generalized the
replacement.


Is there any reason not to replace replace:

    class SubClass(BaseClass):
        def __init__(self, [what you used to take]):
            BaseClass.__init__(self, [what you used to send])

with:

    class SubClass(BaseClass):
        def __init__(self, [what you used to take], *args, **kwargs):
            BaseClass.__init__(self, [what you used to send], *args, **kwargs)

on a near-global basis?

Gerrit Holl <gerrit at nl.linux.org> wrote in message 
news:<mailman.521.1074550438.12720.python-list at python.org>...
 
> A subclass may be a specialized case, e.g.:
 
> class Tree:
>     def __init__(self, evergreen=False):
>         ...
 
> class Spruce(Tree):
>     def __init__(self):
>         Tree.__init__(self, True)

I do understand that you will sometimes need to
modify the argument (or keywords) based on your
subclass' needs.  My question is about unexpected
input -- which you might get if the base class is
later enhanced. What is wrong with the following:

    class Spruce(Tree):
        "Spruce are evergreen."
        def __init__(self, *args, **kwargs)
            eg = kwargs.pop('evergreen', True)
            Tree.__init__(self, eg, *args, **kwargs)

or 

    class Spruce(Tree):
        "Spruce are always evergreen, you annoying user!"
        def __init__(self, *args, **kwargs)
            kwargs['evergreen'] = True
            Tree.__init__(self, *args, **kwargs)


These will work even if tree is later enhanced to keep
track of which trees need extra attention.

    class Tree:
        def __init__(self, evergreen=False, healthy=True):
            ...


 
> or the other way around, e.g.

> class Enemy:
>     def __init__(self, pos):
>         ...
 
> class ShootingEnemy(Enemy):
>     def __init__(self, pos, bullets):
>         Enemy.__init__(pos)
>         ...

> In both cases I don't want to BaseClass.__init(self, *args, **kwargs)...

    class ShootingEnemy(Enemy):
        def __init__(self, pos, bullets, *args, **kwargs):
            Enemy.__init__(self, pos, *args, **kwargs)

indicates that the base class also needed to see position.
This wouldn't take any special thought that wasn't already 
required by passing position in your original example.

And again, it would remove some fragility in case the Enemy
class is later extended to indicate which army it is from,
or what type of unit.

-- 

-jJ  Take only memories.  Leave not even footprints.


From crescent_au at yahoo.com  Thu Jan 29 21:57:26 2004
From: crescent_au at yahoo.com (Ben)
Date: 29 Jan 2004 18:57:26 -0800
Subject: python in dreamweaver
References: <d99e1341.0401271818.625d5ef2@posting.google.com>
	<bv86nc$rto$2@news-reader4.wanadoo.fr>
Message-ID: <d99e1341.0401291857.6deabb3d@posting.google.com>

"Michel Claveau/Hamster" <No.Spam.mc at No.Spam.mclaveau.No.Spam.com> wrote in message news:<bv86nc$rto$2 at news-reader4.wanadoo.fr>...
> Hi !
> 
> Yes !
> 
> I do.


How to do????


From swalters_usenet at yahoo.com  Mon Jan  5 12:34:03 2004
From: swalters_usenet at yahoo.com (Samuel Walters)
Date: Mon, 05 Jan 2004 17:34:03 GMT
Subject: How to control a console based program from Python
References: <cb035744.0401030224.7d6d45b4@posting.google.com>
Message-ID: <pan.2004.01.05.17.32.53.384796@yahoo.com>

|Thus Spake Will Stuyvesant On the now historical date of Sat, 03 Jan 2004
02:24:32 -0800|

> I never used the popen or popen2 libraries but it is my understanding
> that they can capture the output of console based programs.  Is it also
> possible to send keystrokes to console base programs?
> 
> I would like to program a Python program that can play for instance the
> tty version of nethack 3.4.3 on Windows, simulating a human player: for
> nethack it would not be possible to know if a human or a computer
> program is playing it.  It is a console based program, it accepts
> keystrokes and outputs characters on the (Windows) console box.  I did
> see that WConio can read characters from the screen, perhaps I can use
> that, have to experiment with it some more.  But how to send keystrokes?
>  Any help and ideas are much appreciated.  And a happy new year of
> course!

The fact that you're on a microsoft box makes the issue of console-based
programs significantly more sticky than it would be on a *nix system.

You may know this already, but in case you don't, here's a bit of
technical info to get you oriented.

Unix was, early on, designed around the idea of pipes.  Pretty much every
program reads from stdin and writes to stdout. Thus, there's a constant
flow of data into the program and a constant flow out.  On *nix systems, a
terminal pushes your keystrokes to stdin, and interprets the results it
gets from stdout.  (This description is oversimplified, but it will do.) 
The results contain certain codes that, depending on the terminal, move
the cursor around, change colors and such.  A good resource on all this
is: http://www.faqs.org/docs/artu/index.html

Even if you're not that interested in unix stuff, it's a good read because
Python inherits a lot of the unix philosophy.

MS-DOS, and hence microsoft console programs, were based on an entirely
different philosophy, that of CP/M.  Whereas Unix was designed for big
computers with many users running many programs at once, CP/M was designed
for computers with one user running only one program.  CP/M simply
abstracted the low-level hardware calls through the use of interrupts.
Interrupts are called interrupts because they do exactly that:  they
interrupt the entire computer, run some low-level code, then return
control to the (one and only) program running.  I don't think pipes were
ever part of CP/M, but at some point they were grafted onto MS-DOS.  (This
was probably to make some grumpy unix wizards complain less vocally about
having to write code for single user machines.) Almost nothing useful is
done with pipes in MS-DOS.  When you run a console program in Windows,
it's a special program that pretends to be the old Dos system. Apropos
Docs:
http://www.wkonline.com/d/CPM.html
http://www.wkonline.com/d/MS-DOS.html


Chances are that the nethack you're running displays to the screen via
these crufty old Dos interrupts.  While it is possible to "steal" these
interrupts (and snag their data) I don't know of any libraries that would
let you do that, I wouldn't try it unless you've got some serious sorcery
in you.  To give you an idea of how complex it is, somewhere around here,
I've got a manual on all those interrupts and I think it's about 6 inches
thick and involves manipulating the processor registers directly.  You can
probably find some c code to do that, but umm...  I dunno.  I always just
inlined assembly when I was working with MS-Dos.
(;Please, god no ABEND NOW!
 MOV AH,4Ch
 MOV AL,01h
 INT 21h ;*weeps*  Fifteen years later, and I still remember that.
)
http://users.win.be/W0005997/GI/dosref.html

If you *really* want to try making a robot that plays nethack, I suggest
installing cygwin, which gives you a unix environment on top of your
windows system, then compiling nethack for it and *then* you'll have
access to proper pipes.  Besides, you'll get to dabble a bit in *nix land.
 You might like it.
http://www.cygwin.com/

Sam Walters

p.s.  You might try taking this to the python-tutor list.  You will
probably get more answers to questions like this.

-- 
Never forget the halloween documents.
http://www.opensource.org/halloween/
""" Where will Microsoft try to drag you today?
    Do you really want to go there?"""



From jjl at pobox.com  Sat Jan  3 18:56:21 2004
From: jjl at pobox.com (John J. Lee)
Date: 03 Jan 2004 23:56:21 +0000
Subject: Keyboard browsing (was Re: ANN: Python Language Reference)
References: <b16e4ef7.0312260911.42e26052@posting.google.com>
	<bskgj5$gb6$1@panix2.panix.com>
	<cb035744.0312290109.156cd633@posting.google.com>
	<slrnbvbouk.2i08.kamikaze@kuoi.asui.uidaho.edu>
	<mailman.39.1073095598.12720.python-list@python.org>
Message-ID: <87k748powq.fsf@pobox.com>

Gabriel Genellina <gagenellina at softlab.com.ar> writes:

> At 2/1/2004 19:19, you wrote:
> 
> > >  Opera can be completely keyboard-driven.  And to search, you can type
> > >/TEXT, just like you would in lynx or any other proper viewing or
> > >editing tool.
> >
> >Really?  That's not in my Opera/Linux 6.1.
> 
> That really cool feature appeared in v7.20. But Ctrl-F = search in
> page works from prehistoric ages :)

Mozilla also has / for incremental search.  And most have
ALT-<left arrow> and ALT-<right arrow> for history navigation, and tab,
space and return for other navigation (though I'm never sure if I should
hit tab or return...).


John


From exarkun at intarweb.us  Mon Jan 12 14:48:57 2004
From: exarkun at intarweb.us (Jp Calderone)
Date: Mon, 12 Jan 2004 14:48:57 -0500
Subject: Using switches with exec?
In-Reply-To: <20040112170718.38245.qmail@web8310.mail.in.yahoo.com>
References: <btue6p$bdf88$1@ID-111250.news.uni-berlin.de>
	<20040112170718.38245.qmail@web8310.mail.in.yahoo.com>
Message-ID: <20040112194857.GA10477@intarweb.us>

On Mon, Jan 12, 2004 at 05:07:18PM +0000, Premshree Pillai wrote:
>  --- "Diez B. Roggisch" <nospam-deets at web.de> wrote: >
> > I need to run a Python program dynamically within
> > > another program. I am using exec for the purpose.
> > Is
> > > there a way to pass parameter switches to exec?
> > 
> > You can pass a globals-dictionary to exec, which can
> > hold the switches
> > values. 
> > 
> > Diez
> > -- 
> > http://mail.python.org/mailman/listinfo/python-list
> 
> Could you please elucidate with a sample script.
> Suppose I need to pass the switch "-w" to the
> dynamically loaded code (using eval()/exec()).
> Any help is appreciated.
> 

  Options aren't typically passed to "code".  They're passed to the main
function of a program.  For example:

    def main(argv):
        o = GameOptions()
        o.parse(argv[1:])
        ...

  If your code is structured like this, you can avoid using eval() and exec
altogether and simply import and call the main function:

    from foo import main
    main(['progname', '-w'])

  Hope this helps,

  Jp



From jcarlson at nospam.uci.edu  Sat Jan 31 13:27:45 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Sat, 31 Jan 2004 10:27:45 -0800
Subject: Programmers Wanted for Computer Graphics Startup Near
	Philadelphia
In-Reply-To: <2da21d6c.0401310807.671be3b7@posting.google.com>
References: <2da21d6c.0401310807.671be3b7@posting.google.com>
Message-ID: <bvgs76$i30$1@news.service.uci.edu>

> produced demo output that clearly demonstrates the viability of 
> my approaches, which I've been showing to potential licensees and 
> investors.  This demo output is currently being generated through 

Hey Stan,

I don't suppose you'd post a link to a bit of demo output?

  - Josiah


From elainejackson7355 at home.com  Fri Jan  9 13:43:28 2004
From: elainejackson7355 at home.com (Elaine Jackson)
Date: Fri, 09 Jan 2004 18:43:28 GMT
Subject: Pesky reverse()
References: <3t3svvs7ni8l8jnn1l1v60oogirqoaa85f@4ax.com>
Message-ID: <kDCLb.36175$JQ1.19018@pd7tw1no>

>>> list1=[1,2,3]
>>> list2=list1[:]   ##  "cloning"
>>> list1.reverse()==None
1
>>> list1
[3, 2, 1]
>>> list2
[1, 2, 3]


<engsolnom at ipns.com> wrote in message
news:3t3svvs7ni8l8jnn1l1v60oogirqoaa85f at 4ax.com...
|
| I need to use the built-in method 'reverse', but notice strange behavior.
| Foe example:
|
| print my_list.reverse()  doesn't work.
|
| new_list = my_list.reverse() doesn't work.
|
| my_list.reverse()
| print my_list does work. (displays reversed list)
|
| But  I want both a 'forward' and 'reverse' list:
|
| new_list = my+list  # should save a 'forward' copy, right? Nope
| my_list.reverse() actually reverses both copies, since Python is a bit too
| helpful sometimes, and I understand why.
|
| So the question is, how do I get a forward and reverse list?
|
| Thanks......Norm.
|
|




From paul at prescod.net  Sat Jan 24 16:19:08 2004
From: paul at prescod.net (Paul Prescod)
Date: Sat, 24 Jan 2004 13:19:08 -0800
Subject: Perl vs. Python for text manipulation
In-Reply-To: <1013o27e3nb141@corp.supernews.com>
References: <69A0D4AB81C51447AD6BA387782B8D64093D8A@midl-mail4.etcconnect.com>	<028FD9F0-4E01-11D8-BB78-0003934ACDEC@zdome.net>	<mailman.720.1074906442.12720.python-list@python.org>
	<1013o27e3nb141@corp.supernews.com>
Message-ID: <4012E14C.9020102@prescod.net>

Cameron Laird wrote:
> ...
> The comparison with Perl in particular interests me.  I
> often encounter characterizations of Perl (or Ruby--I
> regard them as equivalent in this dimension) as the par-
> agon of text manipulation.  It's not, of course, as Icon
> conclusively demonstrates, at least for me; but I don't
> even see Perl as distinctly superior to Python in text
> mangling.  I recognize that Python REs can feel a bit
> cumbersome, in comparison to Perl, because they essenti-
> ally demand the extra step of explicit compilation.  Is
> that all that people mean, though, when they talk about
> Perl's superiority for text mangling?  Is there more to
> it?

Here's an anecodotal sample where I think that the Perl and Python are 
roughly the same. I translated the Perl to Python. Note that the Python 
is a little more complicated primarily because of Python string 
interpolation and not regular expressions.

http://www.cs.sfu.ca/~cameron/REX.html

# REX/Perl 1.0
# Robert D. Cameron "REX: XML Shallow Parsing with Regular Expressions",
# Technical Report TR 1998-17, School of Computing Science, Simon Fraser
# University, November, 1998.
# Copyright (c) 1998, Robert D. Cameron.
# The following code may be freely used and distributed provided that
# this copyright and citation notice remains intact and that modifications
# or additions are clearly identified.

$TextSE = "[^<]+";
$UntilHyphen = "[^-]*-";
$Until2Hyphens = "$UntilHyphen(?:[^-]$UntilHyphen)*-";
$CommentCE = "$Until2Hyphens>?";
$UntilRSBs = "[^\\]]*](?:[^\\]]+])*]+";
$CDATA_CE = "$UntilRSBs(?:[^\\]>]$UntilRSBs)*>";
$S = "[ \\n\\t\\r]+";
$NameStrt = "[A-Za-z_:]|[^\\x00-\\x7F]";
$NameChar = "[A-Za-z0-9_:.-]|[^\\x00-\\x7F]";
$Name = "(?:$NameStrt)(?:$NameChar)*";
$QuoteSE = "\"[^\"]*\"|'[^']*'";
$DT_IdentSE = "$S$Name(?:$S(?:$Name|$QuoteSE))*";
$MarkupDeclCE = "(?:[^\\]\"'><]+|$QuoteSE)*>";
$S1 = "[\\n\\r\\t ]";
$UntilQMs = "[^?]*\\?+";
$PI_Tail = "\\?>|$S1$UntilQMs(?:[^>?]$UntilQMs)*>";
$DT_ItemSE = 
"<(?:!(?:--$Until2Hyphens>|[^-]$MarkupDeclCE)|\\?$Name(?:$PI_Tail))|%$Name;|$S";
$DocTypeCE = "$DT_IdentSE(?:$S)?(?:\\[(?:$DT_ItemSE)*](?:$S)?)?>?";
$DeclCE = 
"--(?:$CommentCE)?|\\[CDATA\\[(?:$CDATA_CE)?|DOCTYPE(?:$DocTypeCE)?";
$PI_CE = "$Name(?:$PI_Tail)?";
$EndTagCE = "$Name(?:$S)?>?";
$AttValSE = "\"[^<\"]*\"|'[^<']*'";
$ElemTagCE = "$Name(?:$S$Name(?:$S)?=(?:$S)?(?:$AttValSE))*(?:$S)?/?>?";
$MarkupSPE = 
"<(?:!(?:$DeclCE)?|\\?(?:$PI_CE)?|/(?:$EndTagCE)?|(?:$ElemTagCE)?)";
$XML_SPE = "$TextSE|$MarkupSPE";


sub ShallowParse {
   my($XML_document) = @_;
   return $XML_document =~ /$XML_SPE/g;
}

===============


import re
class recollector :
	def __init__(self):
         	self.res={}
	def add(self, name, reg ):
		self.res[name] = reg % self.res

collector = recollector()
a = collector.add

a( "TextSE" ,"[^<]+" )
a( "UntilHyphen" ,"[^-]*-" )
a( "Until2Hyphens" ,"%(UntilHyphen)s(?:[^-]%(UntilHyphen)s)*-" )
a( "CommentCE" ,"%(Until2Hyphens)s>?" )
a( "UntilRSBs" ,"[^\\]]*](?:[^\\]]+])*]+" )
a( "CDATA_CE" ,"%(UntilRSBs)s(?:[^\\]>]%(UntilRSBs)s)*>" )
a( "S" ,"[ \\n\\t\\r]+" )
a( "NameStrt" ,"[A-Za-z_:]|[^\\x00-\\x7F]" )
a( "NameChar" ,"[A-Za-z0-9_:.-]|[^\\x00-\\x7F]" )
a( "Name" ,"(?:%(NameStrt)s)(?:%(NameChar)s)*" )
a( "QuoteSE" ,"\"[^\"]*\"|'[^']*'" )
a( "DT_IdentSE" ,"%(S)s%(Name)s(?:%(S)s(?:%(Name)s|%(QuoteSE)s))*" )
a( "MarkupDeclCE" ,"(?:[^\\]\"'><]+|%(QuoteSE)s)*>" )
a( "S1" ,"[\\n\\r\\t ]" )
a( "UntilQMs" ,"[^?]*\\?+" )
a( "PI_Tail" ,"\\?>|%(S1)s%(UntilQMs)s(?:[^>?]%(UntilQMs)s)*>" )
a( "DT_ItemSE" 
,"<(?:!(?:--%(Until2Hyphens)s>|[^-]%(MarkupDeclCE)s)|\\?%(Name)s(?:%(PI_Tail)s))|%%%(Name)s;|%(S)s" 
)
a( "DocTypeCE" 
,"%(DT_IdentSE)s(?:%(S)s)?(?:\\[(?:%(DT_ItemSE)s)*](?:%(S)s)?)?>?" )
a( "DeclCE" 
,"--(?:%(CommentCE)s)?|\\[CDATA\\[(?:%(CDATA_CE)s)?|DOCTYPE(?:%(DocTypeCE)s)?" 
)
a( "PI_CE" ,"%(Name)s(?:%(PI_Tail)s)?" )
a( "EndTagCE" ,"%(Name)s(?:%(S)s)?>?" )
a( "AttValSE" ,"\"[^<\"]*\"|'[^<']*'" )
a( "ElemTagCE" 
,"%(Name)s(?:%(S)s%(Name)s(?:%(S)s)?=(?:%(S)s)?(?:%(AttValSE)s))*(?:%(S)s)?/?>?" 
)

a( "MarkupSPE" 
,"<(?:!(?:%(DeclCE)s)?|\\?(?:%(PI_CE)s)?|/(?:%(EndTagCE)s)?|(?:%(ElemTagCE)s)?)" 
)
a( "XML_SPE" ,"%(TextSE)s|%(MarkupSPE)s" )
a( "XML_MARKUP_ONLY_SPE" ,"%(MarkupSPE)s" )

def lexxml(data, markuponly=0):
	regex = re.compile(collector.res["XML_SPE"])
	return regex.findall(data)

(I stripped a few features out of the Python code to make it equivalent. 
If it doesn't run as written above you can see the original here:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/65125)

  Paul Prescod




From steve at ferg.org  Thu Jan 15 12:47:20 2004
From: steve at ferg.org (Stephen Ferg)
Date: 15 Jan 2004 09:47:20 -0800
Subject: traceback as string
References: <mailman.202.1071593230.9307.python-list@python.org>
Message-ID: <b16e4ef7.0401150947.43380745@posting.google.com>

I haven't been using this function for very long, but it seems to work. 

You pass it the exception object, and it returns a string.

===================================================

def exception_format(e):
	"""Convert an exception object into a string,
	complete with stack trace info, suitable for display.
	"""
	import traceback
	info = "".join(traceback.format_tb(sys.exc_info()[2]))
	return str(e) + "\n\n" + info

====================================================

Here's an example of how to use it.

==================================================

try:
	main1()
except Exception, e:
	print exception_format(e)

====================================================


From piedmontbiz at aol.com  Wed Jan 14 19:00:48 2004
From: piedmontbiz at aol.com (PiedmontBiz)
Date: 15 Jan 2004 00:00:48 GMT
Subject: Printing to console, no scroll
References: <xqxr7y2sq9l.fsf@cola2.ca.boeing.com>
Message-ID: <20040114190048.06766.00000030@mb-m21.aol.com>

>
>
>"Totte Karlsson" <mtk at qm.com> writes:
>
>> Hi,
>> How can I print to the console without having it scrolling to a new line
>for
>> each print statement?
>> I want to print a count down in the console, but for each count it scrolls
>> the screen (of course).
>> 
>>  Is there another way?
>> 


=====
Here is some code i got off the web.
I use it on my os2 2.1 laptop for which I don't have curses or tkinker libs.
I mostly use the color functions and move
as a analog to turbo pascal/basic gotoxy.

# begin code

#!/usr/bin/env python 
'''
ansi.py

ANSI Terminal Interface

(C)opyright 2000 Jason Petrone <jp at demonseed.net>
All Rights Reserved

Color Usage:
  print RED + 'this is red' + RESET
  print BOLD + GREEN + WHITEBG + 'this is bold green on white' + RESET

Commands:
  def move(new_x, new_y): 'Move cursor to new_x, new_y'
  def moveUp(lines): 'Move cursor up # of lines'
  def moveDown(lines): 'Move cursor down # of lines'
  def moveForward(chars): 'Move cursor forward # of chars'
  def moveBack(chars): 'Move cursor backward # of chars'
  def save(): 'Saves cursor position'
  def restore(): 'Restores cursor position'
  def clear(): 'Clears screen and homes cursor'
  def clrtoeol(): 'Clears screen to end of line'
'''

################################
# C O L O R  C O N S T A N T S #
################################
BLACK = '\033[30m'
RED = '\033[31m'
GREEN = '\033[32m'
YELLOW = '\033[33m'
BLUE = '\033[34m'
MAGENTA = '\033[35m'
CYAN = '\033[36m'
WHITE = '\033[37m'

RESET = '\033[0;0m'
BOLD = '\033[1m'
REVERSE = '\033[2m'

BLACKBG = '\033[40m'
REDBG = '\033[41m'
GREENBG = '\033[42m'
YELLOWBG = '\033[43m'
BLUEBG = '\033[44m'
MAGENTABG = '\033[45m'
CYANBG = '\033[46m'
WHITEBG = '\033[47m'

def move(new_x, new_y):
  'Move cursor to new_x, new_y'
  print '\033[' + str(new_x) + ';' + str(new_y) + 'H'

def moveUp(lines):
  'Move cursor up # of lines'
  print '\033[' + str(lines) + 'A'

def moveDown(lines):
  'Move cursor down # of lines'
  print '\033[' + str(lines) + 'B'

def moveForward(chars):
  'Move cursor forward # of chars'
  print '\033[' + str(lines) + 'C'

def moveBack(chars):
  'Move cursor backward # of chars'
  print '\033[' + str(lines) + 'D'

def save():
  'Saves cursor position'
  print '\033[s'

def restore():
  'Restores cursor position'
  print '\033[u'

def clear():
  'Clears screen and homes cursor'
  print '\033[2J'

def clrtoeol():
  'Clears screen to end of line'
  print '\033[K'

#  ======end code=======



allen





From grahamd at dscpl.com.au  Tue Jan 13 05:39:48 2004
From: grahamd at dscpl.com.au (Graham Dumpleton)
Date: 13 Jan 2004 02:39:48 -0800
Subject: C++ bad-mouthing (was: Why learn Python ??)
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<7xisjh1e3i.fsf@ruckus.brouhaha.com>
	<10064loqc7sd7e3@corp.supernews.com>
Message-ID: <dc6f5c99.0401130239.56f9ae36@posting.google.com>

claird at lairds.com (Cameron Laird) wrote in message news:<10064loqc7sd7e3 at corp.supernews.com>...
> In article <7xisjh1e3i.fsf at ruckus.brouhaha.com>,
> Paul Rubin  <http://phr.cx at NOSPAM.invalid> wrote:
> 			.
> 			.
> 			.
> >I'd say don't bother with C++ unless you're working on a big
> >multi-person project.  Its design will make no sense to you unless
> >you've faced the problems that come up in those projects.  Otherwise
> >it's a big mess.
> 			.
> 			.
> 			.
> And if you *are* working on a big multi-person project, and you
> choose C++, you're likely to end up with ... a big mess.
> 
> I get to say so.  I'm fond of C++, and have seen plenty of pro-
> jects which rely on it.  I've also seen the teams assigned to
> such projects ...

Would agree that more often than not it is the programmers working
on the project. I have met very very few programmers who I thought
had what it takes to develop decent C++ code which is understandable
and maintainable. Part of the problem though is not the programmers
but the C++ libraries they have to work with. Even though the
STL may be the "standard template library", it is pretty dangerous stuff.
Your average programmer however will tell you it is wonderful stuff
and never understand its danger and how one can so easily create
huge disasters with it. Part of the utility of Python is thus not so much
the language itself, but the availability of useful modules to go with
it. I wouldn't say all the Python modules are perfect, some could
certainly have done with a bit more thought, but it certainly gives
a Python programmer a head start over a C++ programmer.


From jl at windsmith.net  Tue Jan 13 09:28:09 2004
From: jl at windsmith.net (John Lull)
Date: 13 Jan 2004 08:28:09 -0600
Subject: Multithreaded COM server problem...
References: <5a90009ufdd66okc8osajrn1a5kokp86mk@4ax.com>
	<btpug4$1oag$1@arachne.labyrinth.net.au>
	<gdv100hgp4tgnclf0c4a4nlr58npi5q3ir@4ax.com>
	<bttcff$qs1$1@arachne.labyrinth.net.au>
Message-ID: <0pr700ddfdf3op14oulk7u82cthaped040@4ax.com>

Mark Hammond <mhammond at skippinet.com.au> wrote (with possible
deletions):

> John Lull wrote:
...
> > Unfortunately, this one has to be a local server since it's providing shared
> > access to a pool of hardware devices from multiple distributed clients. I've
> > carefully reviewed chapters 5 & 12, and appendix D, and wasn't able to find
> > anything addressing threading models in the local server in detail. If I've
> > missed something, I'd be grateful for any additional hints. 
> 
> The problem is that your client code is not running a message loop.  If 
> you change the loop of your client test code to something like:
> 
> for i in range(delay)*10:
>      time.sleep(0.1)
>      pythoncom.PumpWaitingMessages()
> 
> It works as you expect.  A better choice would probably be 
> win32event.MsgWaitForMultipleObjects, but that depends on what your app 
> really does.
> 
> Mark.

I presume you meant my server code. This still leaves all calls to the
server running in a single thread, however. If I insert a call to
PumpWaitingMessages() in a short operation, and it happens to start a
long operation, the result of that short operation will be delayed
until the long operation completes. This will make my server unusable.

I think I really need a server with at least requests from different
clients running in separate threads.

I tried changing win32com.server.localserver to do:
  sys.coinit_flags = 0
instead of:
  sys.coinit_flags = 2

At first glance this seems to do what I want -- requests to the server
seem to run from a thread pool. However, I also get intermittent (but
frequest) startup errors, with a Microsoft Visual C++ Runtime Library
error dialog (during pythoncom.PumpMessages but before my server
module gets imported) reporting:
  Runtime Error!
  Program: c:\Apps\Python2.2\pythonw.exe
  abnormal program termination

When I click OK, my client application reports (reformatted for
posting):
  Traceback (most recent call last):
    File "D:\Cust\Kinetics\comThreads\test20.py", line 7, in ?
      app=Dispatch('PyComThreads.Application')
    File "C:\Apps\Python2.2\lib\site-packages\win32com
          \client\__init__.py", line 95, in Dispatch
      dispatch, userName = dynamic._GetGoodDispatchAndUserName(
                                      dispatch,userName,clsctx)
    File "C:\Apps\Python2.2\lib\site-packages\win32com
          \client\dynamic.py", line 84, in _GetGoodDispatchAndUserName
      return (_GetGoodDispatch(IDispatch, clsctx), userName)
    File "C:\Apps\Python2.2\lib\site-packages\win32com
          \client\dynamic.py", line 72, in _GetGoodDispatch
      IDispatch = pythoncom.CoCreateInstance(IDispatch, None, clsctx,
                                             pythoncom.IID_IDispatch)
  pywintypes.com_error: (-2146959355, 'Server execution failed',
                         None, None)

I do *not* seem to get this error if the server is already running
because of a request from another process.

If I'm not able to track down the cause of this error, is there some
way I can (during object creation) create a new thread to handle all
requests on the new object? I know how to create the thread, what I
don't know is how I would tell the COM mechanism to route all requests
on the new object to the message pump in the new thread.

Thanks for your assistance.

Regards,
John





From rnd at onego.ru  Mon Jan  5 04:08:33 2004
From: rnd at onego.ru (Roman Suzi)
Date: Mon, 5 Jan 2004 12:08:33 +0300 (MSK)
Subject: Is it bug or feature in sre?
Message-ID: <Pine.LNX.4.58.0401051204090.6205@suzi.com.onego.ru>


I've accidentally tried on of my programs written for Python 1.5
and encountered this:

Python 2.3.1 (#1, Sep 25 2003, 10:15:04)
[GCC 3.2.2 20030222 (Red Hat Linux 3.2.2-5)] on linux2
......
>>> re.compile("(?P<gr>[A-Z]*)?")
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "/usr/local/lib/python2.3/sre.py", line 179, in compile
    return _compile(pattern, flags)
  File "/usr/local/lib/python2.3/sre.py", line 229, in _compile
    raise error, v # invalid expression
sre_constants.error: nothing to repeat

I wonder why I can't do this? I guess it's of terrible style, but
is this behaviour intentional or not?
Probably it is good idea to mention this in Python update path
documents. Otherwise some old programs will mysteriously fail.


Sincerely yours, Roman A.Suzi
-- 
 - Petrozavodsk - Karelia - Russia - mailto:rnd at onego.ru -




From fBechmann at web.de  Sat Jan 17 09:22:28 2004
From: fBechmann at web.de (Frank Bechmann)
Date: 17 Jan 2004 06:22:28 -0800
Subject: [OT] AS/400
References: <mailman.352.1074092092.12720.python-list@python.org>
	<bu4a5n$k9$6@atlantis.news.tpi.pl> <4005cd03@news.mt.net.mk>
Message-ID: <dbc00a99.0401170622.5f1902d0@posting.google.com>

OS-wise an incredible innovative and visionary machine,
programming-wise you had .NET (read as: multi-language
runtime-environment) since more than a decade. unequaled productivity
for business application development with the usual triple
dialog-processing - business logic - database.

if only it had more cool ILE-languages than RPG, CL, Cobol and a
poorly supported C/C++.

btw.: there is even a python port for the AS/400, but even if CL as
ugly as a nightmare it can't be beaten in terms of productivity on an
AS/400.


From cappy2112 at yahoo.com  Sun Jan 25 01:04:23 2004
From: cappy2112 at yahoo.com (Tony C)
Date: 24 Jan 2004 22:04:23 -0800
Subject: pyMagick vs PIL
Message-ID: <8d3e714e.0401242204.38c9c0e@posting.google.com>

I've used Image Magick before, and I'm happy with it.
When I searched for Python extensions for Image Magick, I found an
unsupported
(an old) version of pyMagick.

I'm wondering if this was very popular, or if the author just didn't
have time to continue supporting it.

I'd like to hear from someone who used pyMagick and PIL, for some
comparative opinions.


thanks


From tim.golden at viacom-outdoor.co.uk  Fri Jan 23 11:31:55 2004
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Fri, 23 Jan 2004 16:31:55 -0000
Subject: File Install Program Using Python?
Message-ID: <F1921F85572CB04D9F55B14BDC76B3E4434654@tdi_nt9.internal.viacom-outdoor.co.uk>

>From: CB Hamlyn [mailto:cbh at newenglandhomes.net]
...
>Anyway, I want to create an installation program that takes a 
>folder and all
>it's sub-folders and copies them from a compressed form into the proper
>directory.  Basically a simplified version InstallSheild or whatever.
...
>Any help would be appreciated.
>
>Thanks
>CB Hamlyn
>

You want to be looking at the zipfile and/or gzip and/or bz2 modules:

http://www.python.org/doc/current/lib/module-bz2.html

http://www.python.org/doc/current/lib/module-gzip.html

http://www.python.org/doc/current/lib/module-zipfile.html

TJG


________________________________________________________________________
This e-mail has been scanned for all viruses by Star Internet. The
service is powered by MessageLabs. For more information on a proactive
anti-virus service working around the clock, around the globe, visit:
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From mark at mceahern.com  Mon Jan 19 12:17:43 2004
From: mark at mceahern.com (Mark McEahern)
Date: Mon, 19 Jan 2004 11:17:43 -0600
Subject: ConfigParser - setting the order of  options in a section
In-Reply-To: <e10307b1.0401190724.6ef7fa69@posting.google.com>
References: <e10307b1.0401190724.6ef7fa69@posting.google.com>
Message-ID: <1074532662.5354.48.camel@dev.internal>

On Mon, 2004-01-19 at 09:24, S.Ramaswamy wrote:
> I am trying unsuccessfully to set the order of options [...]

Sections and options are internally stored by ConfigParser in
dictionaries.  I think the idea is that, as far as ConfigParser is
concerned, the order of sections and options within a section is
unimportant.  So if it *is* important to you, you're going to have to do
the ordering yourself.

Also, in your code, you seem to treat comments as if they were options,
setting them with set().  As far as I can tell, ConfigParser doesn't
provide anyway for you to associate a comment with an option.

What I'd do is provide your own write function or writer object that
does what you want it to do.

Cheers,

// m





From mwh at python.net  Tue Jan 13 05:59:48 2004
From: mwh at python.net (Michael Hudson)
Date: Tue, 13 Jan 2004 10:59:48 GMT
Subject: setproctile()?
References: <mailman.311.1073954380.12720.python-list@python.org>
Message-ID: <m3y8scxgf0.fsf@pc150.maths.bris.ac.uk>

Wilfredo S?nchez <wsanchez at wsanchez.net> writes:

>    Is there a way to set the kernel's notion of a python process' name
> on Unix such that, for example, ps shows what I specify?

No.  I seem to remember than last time this went around it was decided
that it was too hard to do portably, but that's just possibly flaky
memory.  You might want to consult the python-dev archives.

Cheers,
mwh

-- 
  /* I'd just like to take this moment to point out that C has all
     the expressive power of two dixie cups and a string.
   */                       -- Jamie Zawinski from the xkeycaps source


From miki.tebeka at zoran.com  Mon Jan 19 17:21:02 2004
From: miki.tebeka at zoran.com (Miki Tebeka)
Date: 19 Jan 2004 14:21:02 -0800
Subject: ConfigParser - setting the order of  options in a section
References: <e10307b1.0401190724.6ef7fa69@posting.google.com>
Message-ID: <4f0a9fdb.0401191421.36060536@posting.google.com>

Hello,

> I am trying unsuccessfully to set the order of options using  the
> set(section,option,value) method ( Python 2.2.2) and writing to a
> file. But the options always appear in a random order.
I had the same problem. Just hand written the file myself, the syntax
of the .cfg files is *very* simple and by iterating over the
sections/values it's very easy to generate the "right" output file.

HTH.
Miki


From bkelley at wi.mit.edu  Fri Jan  9 12:02:36 2004
From: bkelley at wi.mit.edu (Brian Kelley)
Date: Fri, 09 Jan 2004 12:02:36 -0500
Subject: Python And Internationalization maybe a pre-pep?
Message-ID: <3ffede43$0$563$b45e6eb0@senator-bedfellow.mit.edu>

I have been using gettext and various utilities to provide 
internationalization for a wxPython application and have not really been 
liking the process.  Essentially it uses a macro-style notation to 
indicate which strings should be internationalized.

Essentially, everything looks like this
_("STRING")

A good description of this system is located here
http://wiki.wxpython.org/index.cgi/Internationalization

I got to thinking that this is python, I shouldn't have to do this.  Why 
not have a mechanism to capture this data at compile time?

I made a new python string type and got enough working on the parser to 
accept

string = i"whatever"

Which is just a subtype of string.  When python parses this it adds it 
in an entry in the internationalization table.  (essentially a 
dictionary)  It also addes it as an entry to the standard gettext 
mechanism to indicate strings that need to be localized.  When the 
string is created, if a value exists in the international table for the 
given string, the string is converted to the current locale.

The locale is set through the standard locale module.  When this 
happens, all internationalized strings, when used, are converted to 
their international representations (using unicode if necessary) 
automagically through the gettext system.

Hopefully I'm not reinventing the wheel but one nice thing about this 
system is that after some slight code modifications to the python 
sources declaring exception error messages to be international, I now 
have a nice dictionary of error messages that need to be localized. 
These would be localized in the standard way using gettext tools.

Now, I don't know if this is a good idea or not, and I may be 
reinventing some wheels, but it has some appealing characteristics and 
ties in with the gettext system really well.  Of course, I'm a bit leary 
with changing the python parser but I was uncomfortable with the two 
step process of writing the code, then passing it through a source 
analyzer so that it could be internationalized.

Of course I have some issues, like if you use an international string in 
a dictionary and the internal value changes based on the locale bad 
things happen.  This requires that the locale be set only once at the 
beginning of the application otherwise undesirable events occur :)

What I would like is something like

import internationalization

and then at compile time strings like i"whatever" would be analyzed but 
would be normal strings without "import internationalization"

So, am I being silly, redundant or just plain different?

Brian



From fumanchu at amor.org  Sat Jan  3 18:40:55 2004
From: fumanchu at amor.org (Robert Brewer)
Date: Sat, 3 Jan 2004 15:40:55 -0800
Subject: Recurring dates module [was: Project dream]
Message-ID: <DE1CF2B4FEC4A342BF62B6B2B334601E561BBE@opus.amorhq.net>

> eltronic at juno.com wrote:
> > a timer capable of alarms or starting programs with
> > various ways of specifying the event, weekly monthly 
> > don't start untill, stop after date, user defined, etc.

Then I responded:
> I've been needing to write this, as well, for my own apps. Here is a
> first attempt (*very* alpha); feedback/additions appreciated.
> 
> http://www.aminus.org/rbre/python/recur.py
> http://www.aminus.org/rbre/python/test_recur.py

I updated this today, including time functions in addition to the date
functions and generally "filling in the corners". I also included an
interval calculation function for e.g., threading.Timer. Finally, I
wrapped the bare generator functions in a Recurrence class. I'm now
using it for my object server, and it seems to be working well.

Again, any feedback appreciated, especially from Skip M. (who's worked
on this problem before, it seems ;).


Robert Brewer
MIS
Amor Ministries
fumanchu at amor.org



From piedmontbiz at aol.com  Wed Jan 21 17:44:34 2004
From: piedmontbiz at aol.com (PiedmontBiz)
Date: 21 Jan 2004 22:44:34 GMT
Subject: Secure Voting software
Message-ID: <20040121174434.28446.00000428@mb-m15.aol.com>

Listening to National Public Radio while reading comp.lang.python. What a life!

I just heard a piece on NPR about the security failures of an electronic voting
system being developed. I know a voting system could be developed in python. I
am working on a simulator myself to run via the web (a personal project only)

Are there any features which would make python a viable alternative to develop 
a real voting system for use in the US? Why or why not?

What things must I keep in mind when I design a python application to be
secure?

Since python is developed using C, can  python be free from the buffer overrun
problems which plague other C programs?

allen





From op73418 at mail.telepac.pt  Thu Jan 15 09:15:29 2004
From: op73418 at mail.telepac.pt (Gonçalo Rodrigues)
Date: Thu, 15 Jan 2004 14:15:29 +0000
Subject: super. could there be a simpler super?
References: <mailman.385.1074156644.12720.python-list@python.org>
Message-ID: <3u7d00tr6088nceeajqr9m2j2t2vatta5a@4ax.com>

On Thu, 15 Jan 2004 11:50:57 +0300, Kerim Borchaev <warkid at hotbox.ru>
wrote:

>Hello!
>
>  Always when I use "super" I create a code duplication because class
>  used as first arg to "super" is always the class where the method
>  containing "super" was defined in:
>  '''
>  class C:
>      def method(self):
>          super(C, self).method()
>  '''
>
>  Obviously the methods like the one below doesn't work "right";-)
>  '''
>  def super(self):
>      super(self.__class__, self)
>  class C:
>      def method(self):
>          super(self).method()
>  '''

Hmm... I once used super where the class used as first arg was *not*
the class defining the method, it was it's super class. So I was
calling, not the super method, but it's grand-super method.

Arguably, this is a clear sign of bad design on my part. But that's
how it went, anyway.

With my best regards,
G. Rodrigues



From hgeldenhuys at gims.com  Wed Jan 21 09:32:24 2004
From: hgeldenhuys at gims.com (Herman Geldenhuys)
Date: Wed, 21 Jan 2004 16:32:24 +0200
Subject: Dailing modem.
Message-ID: <002601c3e02b$62f82130$b10d10ac@metasalio>

HI.

I need to dail a modem from python and disconnect it again. Is there a pythonic way of doing this? Life is just too short for fiddling with the complexity of TAPI via COM. But if you do have a TAPI-way of doing this, please share.

Help will be welcomed greatly!

Thanks

Herman
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From mcfletch at rogers.com  Fri Jan  9 09:06:33 2004
From: mcfletch at rogers.com (Mike C. Fletcher)
Date: Fri, 09 Jan 2004 09:06:33 -0500
Subject: Debugging Python
In-Reply-To: <BAY99-F680yNu8O2XIC00032563@hotmail.com>
References: <BAY99-F680yNu8O2XIC00032563@hotmail.com>
Message-ID: <3FFEB569.9040007@rogers.com>

Standard module pdb is popular (and what I use, though I also do lots of 
print-statement debugging too).  There's also a win32db (or something 
like that) in PythonWin.  Some of the IDE's have integrated debuggers 
which are normally very similar to pdb.  I think HapDebugger is about 
the only truly "different" debugging system, in that it's an 
out-of-process (and IIRC, remote) debugging mechanism that relies on a 
patched version of Python.

BTW, the Agile Programmer types have been known to suggest that 
debuggers are entirely unnecessary, as everything should be caught by 
more and more fine-grained unit-tests.  Seems like a nice way to go, IMO.

HTH,
Mike

Ashley Lloyd wrote:

> What do people generally use to debug their Python programs? I haven't 
> seen anything out there that walks through the code, but perhaps I'm 
> looking in the wrong places?

_______________________________________
  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://members.rogers.com/mcfletch/






From tweedgeezer at hotmail.com  Wed Jan 28 10:26:25 2004
From: tweedgeezer at hotmail.com (Jeremy Fincher)
Date: 28 Jan 2004 07:26:25 -0800
Subject: I support PEP 326
References: <698f09f8.0401272000.79704ef0@posting.google.com>	<mailman.654.1074788734.12720.python-list@python.org>	<698f09f8.0401271318.21c9ca72@posting.google.com>	<bv6ph8$181$1@news.service.uci.edu>
	<mailman.884.1075263037.12720.python-list@python.org>
Message-ID: <698f09f8.0401280726.1c7f764e@posting.google.com>

Anthony Baxter <anthony at interlink.com.au> wrote in message news:<mailman.884.1075263037.12720.python-list at python.org>...
> >>> len(dir(__builtins__))
> 125
> 
> That's a _lot_ of stuff in one module. Even if you exclude the 40-odd 
> exceptions that are there, that's still a lot of guff in one big flat
> namespace.

There certainly is, but are the mistakes of the past going to doom us
to put things in the wrong place until we get to clean it up?  I think
the one appropriate place for the proposed constants is __builtins__,
for the obvious reasons that (a) all other singleton constants are
there (None, True, False) and (b) ease of implementation of cmp (with
Maximum and Minimum in __builtins__, it's a 5-line change, I read on
Python-dev).

Yes, __builtins__ is bloated, but as Mr. Holl mentioned, a significant
amount of it can be removed once Guido's willing to break
backwards-compatibility.  But why make 3.0 even more
backwards-incompatible than it is now by sticking rightful builtins
somewhere else just to keep the builtin namespace artificially
smaller?

(Or consider this: as a native speaker of English, I have a working
vocabulary of tens of thousands of English words, and a non-working
vocabulary in the hundreds of thousands.  Do people really believe
that the difference between 125 and 127 (or 150, or 200) builtins is
going to increase my cognitive load significantly?)

Jeremy


From raims at dot.com  Tue Jan 13 11:26:07 2004
From: raims at dot.com (Lawrence Oluyede)
Date: Tue, 13 Jan 2004 17:26:07 +0100
Subject: Does anyone else not find the fun in programming...?
References: <d232c5e.0401130823.27fd26ff@posting.google.com>
Message-ID: <87smijolwg.fsf@mobile.foo>

chris.lyon at spritenote.co.uk (Chris Lyon) writes:

> Do I need help ?

Mmmm maybe programming is not your way (or you work in a boring
place :)

-- 
Lawrence "Rhymes" Oluyede
http://loluyede.blogspot.com


From felix_mcallister at hotmail.com  Thu Jan  8 07:45:21 2004
From: felix_mcallister at hotmail.com (Felix McAllister)
Date: 8 Jan 2004 04:45:21 -0800
Subject: NNTP Server for this group
References: <eee18d22.0401072316.37ccff69@posting.google.com>
Message-ID: <ccb2a946.0401080445.5874553c@posting.google.com>

If you don't mind not being able to post then try news://140.99.99.133

You'll find more servers that mirror comp.lang.python by going onto
http://www.disenter.com/

Felix.

jonas at jonasgalvez.com (Jonas Galvez) wrote in message news:<eee18d22.0401072316.37ccff69 at posting.google.com>...
> Can anyone recommend a good NNTP server for accessing this group?
> 
> Thanks in advance,
> Jonas Galvez


From mhammond at skippinet.com.au  Sat Jan 31 17:15:54 2004
From: mhammond at skippinet.com.au (Mark Hammond)
Date: Sun, 01 Feb 2004 09:15:54 +1100
Subject: win32com support
In-Reply-To: <Xns94817485CEFF0crawleystormntlworld@217.158.240.23>
References: <Xns947FEAF73D102crawleystormntlworld@217.158.240.24>
	<bveqqb$1fue$1@arachne.labyrinth.net.au>
	<Xns94817485CEFF0crawleystormntlworld@217.158.240.23>
Message-ID: <bvh9f0$1gej$1@arachne.labyrinth.net.au>

Crawley wrote:
>   File "E:\Python23\lib\site-packages\win32com\client\dynamic.py", line 
> 460, in __getattr__
>     raise AttributeError, "%s.%s" % (self._username_, attr)
> exceptions.AttributeError: <unknown>.SetAddInInfo
> 
> 
> Which I believe is because the object I'm calling does not support the 
> SetAddInInfo method.

For some reason, the object you are using does not have makepy support, 
which is unusual.

> After a bit of investigation, this makes sense as my class extends 
> _IDTExtensibility2 and for that the application parameter is of type 
> 'Object'.  I cant see how to cast this into an IApplication instance, 
> which is what I need to call my function.

Generally, you can do a QueryInterface for the object.  However, if the 
object does not support IDispatch, you will haver trouble - we don't 
support arbitrary interfaces when calling them, only implementing them.


ob = ob._obj_.QueryInterface(

> Ive also tried making my object derive from IDSAddin (what VC uses), but 
> when I try the following (GUID found 
> here:http://msdn.microsoft.com/library/default.asp?url=/library/en-
> us/vcug98/html/_asug_how_add.2d.ins_connect_and_disconnect.asp)
> 
> universal.RegisterInterfaces('{C0002F81-AE2E-11cf-AD07-00A0C9034965}', 0, 
> 1, 0, ["_IDSAddin"])
> 
> I get the following error:

The GUID must be for a type library.  If you run "makepy.py -i", then 
you will get a list of all valid typelibs you can use, and the params 
for it.

Mark.



From try_vanevery_at_mycompanyname at yahoo.com  Wed Jan 14 02:14:17 2004
From: try_vanevery_at_mycompanyname at yahoo.com (Brandon J. Van Every)
Date: Tue, 13 Jan 2004 23:14:17 -0800
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
	<pan.2004.01.14.01.17.00.970198@fakeemail.com>
	<bu2ana$bmpci$1@ID-207230.news.uni-berlin.de>
	<pan.2004.01.14.04.32.52.403279@fakeemail.com>
Message-ID: <bu2pim$d3pa0$1@ID-207230.news.uni-berlin.de>


"Dan Olson" <hatespam at fakeemail.com> wrote in message
news:pan.2004.01.14.04.32.52.403279 at fakeemail.com...
> On Tue, 13 Jan 2004 19:00:43 -0800, Brandon J. Van Every wrote:
>
> > I'm curious what sky is going to fall if I don't follow your advice?
>
> It's just advice.  I think it would have been smoother for everyone if
> you'd followed it, but apparently you prefer to piss on my advice so
> that's cool too.

You have some deep-seated need for smootheness?  I see no a priori value in
smoothness.

-- 
Cheers,                     www.indiegamedesign.com
Brandon Van Every           Seattle, WA

20% of the world is real.
80% is gobbledygook we make up inside our own heads.



From swalters_usenet at yahoo.com  Mon Jan  5 17:05:43 2004
From: swalters_usenet at yahoo.com (Samuel Walters)
Date: Mon, 05 Jan 2004 22:05:43 GMT
Subject: Python/C and PYTHONPATH
References: <btbn3o$5oo$1@ousrvr3.oulu.fi>
	<mailman.98.1073310473.12720.python-list@python.org>
	<btc2ng$alg$1@ousrvr3.oulu.fi>
Message-ID: <pan.2004.01.05.22.04.32.450627@yahoo.com>


Fair warning:  At this point, I couldn't even get the example you quoted
to link properly.  Of course, I didn't dig too deep, as I'm in a hurry.

throw this c code into a .h file (my name for it is envdump.h)

---code---
#include <stdio.h>

extern char **environ;

void fdump_env(FILE *fd)
{
    char **ptr;
    int i = 0;
    ptr = environ;
    while(ptr[i] != NULL)
    {
        fprintf(fd, "%i : %s\n", ptr[i]);
        i++;
    }
}


void dump_env()
{
    char **ptr;
    int i = 0;
    ptr = environ;
    while(ptr[i] != NULL)
    {
        printf("%i : %s\n", i, ptr[i]);
        i++;
    }
}
---code---

Now, just inside the main function (or, perhaps, wherever you please, but
I'd try the line right before the first if statement) call dump_env() and
it will spit out all the environment variables that your C program
received.  You might find something there that's of interest.

Or, call setenv ("man 3 setenv") to manually set a python-path.
you can use that in combo with getenv ("man 3 getenv") to append to an
existing PYTHONPATH, if you so choose.

Give it a go, please let me know how it turns out.  If this doesn't shed
some light on the matter I might have another idea once I'm not rushing
around.

HTH

Sam Walters

-- 
Never forget the halloween documents.
http://www.opensource.org/halloween/
""" Where will Microsoft try to drag you today?
    Do you really want to go there?"""



From cwilcox at etcconnect.com  Wed Jan 14 09:10:41 2004
From: cwilcox at etcconnect.com (Christian Wilcox)
Date: Wed, 14 Jan 2004 08:10:41 -0600
Subject: Python and XForms: existing implementations?
Message-ID: <69A0D4AB81C51447AD6BA387782B8D64093D6E@midl-mail4.etcconnect.com>

Does anyone know of any existing Python implementations of an XForms viewer?
 
Christian
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From db3l at fitlinxx.com  Mon Jan 12 12:00:32 2004
From: db3l at fitlinxx.com (David Bolen)
Date: 12 Jan 2004 12:00:32 -0500
Subject: wxpython AttributeError!
References: <btn9dh$93f9m$1@ID-200515.news.uni-berlin.de>
Message-ID: <u3cal14r3.fsf@fitlinxx.com>

"frank" <frank at pc-nett.no> writes:

> need help with wxpython.
> wxpython code is made with boa-constructor
> 
> when i run the code i get this error message:
(...)
> File "wxFrame1.py", line 157, in _init_ctrls
> EVT_RIGHT_DOWN(self.treeCtrl1, self.OnTreectrl1RightDown)
> AttributeError: wxFrame1 instance has no attribute 'OnTreectrl1RightDown'
(...)
> 
> this is the code have this code:
> 
> self.treeCtrl1 = wxTreeCtrl(id=wxID_WXFRAME1TREECTRL1, name='treeCtrl1',
>               parent=self.splitterWindow1, pos=wxPoint(2, 2),
> size=wxSize(200,
>               610), style=wxTR_HAS_BUTTONS, validator=wxDefaultValidator)
>         self.treeCtrl1.SetFont(wxFont(10, wxSWISS, wxNORMAL, wxNORMAL,
> False,
>               'Microsoft Sans Serif'))
>         EVT_RIGHT_DOWN(self.treeCtrl1, self.OnTreectrl1RightDown)
>         EVT_TREE_SEL_CHANGED(self.treeCtrl1, wxID_WXFRAME1TREECTRL1,
>               self.OnTreectrl1TreeSelChanged)
> 
> and the event EVT_RIGHT_DOWN code is:
> 
> def OnTreectrl1RightDown(self, event):
>           dosomething()
>           event.Skip()
> 
> the "OnTreectrl1RightDown" is in the wxframe class
> what to do?

First is not to snip so much code for your post that context is lost :-)

It's not clear from the above code whether or not your initialization
code and the function definition are within the same class (especially
with the different indentation levels).  If in fact the initialization
code is part of your __init__ definition in wxFrame1, which also holds
the callback function definition, at first glance it looks like it
should be ok.  Or, if the callback definition is in a subclass of
wxFrame1 then you should be ok as well.  But the error you are getting
would imply that 'self' in your initialization code is not the same
object as that which contains the callback definition.

If you could post a more complete snippet of the code (in particular,
at a minimum an unchanged copy of the entire __init__ (or other
function) containing the initialization code, including its enclosing
class definition, as well as the same for the callback function), it
might be easier to see what problem exists.

-- David


From sdeibel at wingide.com  Thu Jan 22 15:02:40 2004
From: sdeibel at wingide.com (Stephan Deibel)
Date: Thu, 22 Jan 2004 15:02:40 -0500 (EST)
Subject: Nokia prefers Python
In-Reply-To: <40102241.E4A38F73@engcorp.com>
Message-ID: <Pine.LNX.4.50.0401221459220.3123-100000@hedgehog>

On Thu, 22 Jan 2004, Peter Hansen wrote:
> Stephan Deibel wrote:
> > 
> > Anyone happen to have a contact at Nokia that might be willing and able
> > to write up a Python Success Story based on this?  Or know of someone
> > else that might?
> > 
> > http://pythonology.org/success
> 
> Maybe it's a bit soon to call it a "success"?  It sounds like it's just
> in evaluation at this stage...

Yes, probably correct.  I'm mainly trying to make contact... the actual
process of writing a story and getting it approved by the company involved
can take a long time.

- Stephan




From eddie at holyrood.ed.ac.uk  Tue Jan 20 11:45:45 2004
From: eddie at holyrood.ed.ac.uk (Eddie Corns)
Date: Tue, 20 Jan 2004 16:45:45 +0000 (UTC)
Subject: best book: aint no such thing, and encouragement for old coots
References: <mailman.409.1074191840.12720.python-list@python.org>
	<bu8j31$s4c$1@scotsman.ed.ac.uk>
	<pan.2004.01.16.11.58.58.634101@yahoo.com>
	<m3vfn86vwn.fsf@pc150.maths.bris.ac.uk>
	<d3c9c04.0401190851.5a2f006b@posting.google.com>
	<95aa1afa.0401192355.77568ed4@posting.google.com>
	<d3c9c04.0401200633.72675cf7@posting.google.com>
Message-ID: <bujlvp$nvb$1@scotsman.ed.ac.uk>

cartermark46 at ukmail.com (Mark Carter) writes:


>What I meant was: programs written in s-exprs makes it possible to
>accomodate new paradigms because, ultimately, everything is a list,
>which you can parse to accomodate your new paradigm. Programs not
>written in s-exprs require extra syntax to be bolted onto the
>language.

The way I view it is that you can express _everything_ you want a computer to
do as:

  COMMAND arg1 arg2 ...

When you have code as data thrown in to the mix you can extend this concept to
what you want done with code, so as well as saying:

  ADD x y z
  PUT this there
  etc.

you have the ability to control the way code is executed

  DO this-body-of-code
  DO this-body-of-code for all these things

And essentially new paradigms ARE about how we organise code, so we can indeed
adapt to any paradigm AND we still have minimum syntax to deal with.  One of
the things I like about scheme in this instance is that the rules of your
paradigm are explicit in the code/macros that you create to parse the basic
constructs of your paradigm (objects, messages, whatever).

>But I suppose, if you want, to argue that all Turing Complete
>languages are equivalent, so they support all the paradigms that the
>others support.

Then you run into Greenspun's tenth rule amongst others.  Also, of course, you
have to consider expressiveness which is much harder to pin down.

Eddie


From swalters_usenet at yahoo.com  Fri Jan 16 07:00:27 2004
From: swalters_usenet at yahoo.com (Samuel Walters)
Date: Fri, 16 Jan 2004 12:00:27 GMT
Subject: best book: aint no such thing, and encouragement for old coots
References: <mailman.409.1074191840.12720.python-list@python.org>
	<bu8j31$s4c$1@scotsman.ed.ac.uk>
Message-ID: <pan.2004.01.16.11.58.58.634101@yahoo.com>

| Eddie Corns said |
> The next step is to read "Structure and Interpretation of Computer Programs"
> aka SICP and start all over again, in terms of "clearer conceptual vantage
> point" it just can't be beat.  It's even availabe online somewhere.

Here:
http://mitpress.mit.edu/sicp/full-text/book/book.html

It's the major reason I'm learning scheme.
I just don't stop hearing good things about this book.

Sam Walters.

-- 
Never forget the halloween documents.
http://www.opensource.org/halloween/
""" Where will Microsoft try to drag you today?
    Do you really want to go there?"""



From usenet at mail-2-me.com  Fri Jan 30 20:09:15 2004
From: usenet at mail-2-me.com (Dirk)
Date: Sat, 31 Jan 2004 02:09:15 +0100
Subject: How to start a DTS Package on MS-SQL-Server?
In-Reply-To: <mailman.1050.1075484359.12720.python-list@python.org>
References: <mailman.1050.1075484359.12720.python-list@python.org>
Message-ID: <bvevhh$akj$06$1@news.t-online.com>

Tim Golden wrote:
>>-----Original Message-----
>>From: usenet at mail-2-me.com [mailto:usenet at mail-2-me.com]
>>Sent: 30 January 2004 12:48
>>To: python-list at python.org
>>Subject: How to start a DTS Package on MS-SQL-Server?
>>
>>
>>Hi!
>>
>>Does anybody know how to start a DTS-Package on a MS-SQL-Server out of
>>a Python-Script?
>>
>>Thanks for your help!
>>
>>Dirk
> 
> 
> Haven't tried it, but there is a dtsrun executable
> (C:\Program Files\Microsoft SQL Server\80\Tools\BINN\dtsrun.EXE)
> in my setup, which seems hopeful.
> 
> There is also a DTS COM library which might do something.
> 
> TJG
> 
> 
> ________________________________________________________________________
> This e-mail has been scanned for all viruses by Star Internet. The
> service is powered by MessageLabs. For more information on a proactive
> anti-virus service working around the clock, around the globe, visit:
> http://www.star.net.uk
> ________________________________________________________________________
> 
Hi!

Sorry, I think I forgot to write that I want to start this from a remote 
computer. So I can't simply use popen. But I know about this dtsrun 
executable (that's how the sql-server does it itself...).

Dirk


From engsolnom at ipns.com  Mon Jan  5 16:47:09 2004
From: engsolnom at ipns.com (engsolnom at ipns.com)
Date: Mon, 05 Jan 2004 13:47:09 -0800
Subject: NEWBIE: doctest question
Message-ID: <gbmjvvknue4pgar2goch4spq9qugnh0jmg@4ax.com>


I'm trying to learn a bit about the doctest module,
with the goal of incorporating unit test in my
'real' code.

I created a test class, and it works fine, until
I force an error. The results are:

C:\Python23>python myfiles\tst_doctest.py 
*****************************************************************
Failure in example: print obj.s2hex('abcdef')
from line #4 of __main__.Unittest
Expected:
*** Source string too long
None
Got:

*** Source string too long

None
*****************************************************************
1 items had failures:
   1 of   3 in __main__.Unittest
***Test Failed*** 1 failures.

If I remove the prints before and after
print '*** Source string too long'
in s2hex, it works fine, or if I just use:
return '*** Source string too long'
that works OK too. But if I try to compensate
for the pre and post 'print' in the class
doc string for the blank lines, it complains
about that.

The 'None' snows me... it would seem that
on error, the return should be honored,
and the 'return hex_string' should not be.

Is the lesson here to handle exceptions better?

All comments welcome.
Norm

TEST CODE:

class Unittest:

    """
    This class converts an ASCII string to the hex equiv blah blah

    >>> obj = Unittest()
    >>> print obj.s2hex('abcd')
    61626364
    >>> print obj.s2hex('abcdef')
    *** Source string too long
    None
    """

    def __init__(self):
        pass

    def s2hex(self,source):
        hex_string = ''
        if len(source) > 5:
            print
            print '*** Source string too long'
            print
            return
        else:
            for char in source:
                hex_string += '%.2x' % ord(char)
            return hex_string

if __name__ == '__main__':
    import doctest, sys
    doctest.testmod(sys.modules[__name__])




From python-url at phaseit.net  Mon Jan 19 15:30:22 2004
From: python-url at phaseit.net (Cameron Laird)
Date: Mon, 19 Jan 2004 20:30:22 -0000
Subject: Dr. Dobb's Python-URL! - weekly Python news and links (Jan 19)
Message-ID: <100ofiu8c1rmi1a@corp.supernews.com>

QOTW:  "I'm starting with Python and I find it really great!  It's ... natural!"
    						Lupe
http://groups.google.com/groups?selm=mailman.539.1068218589.702.python-list%40python.org
  
"I used to default to the widely-held position that 'language wars' are mostly
content-free 'religious' arguments, but experience has taught me otherwise. 
There are big, important, differences in programmer efficiency, in
computer-resource efficiency, and in community support.  And, to some extent,
in the ways they make you think about problems."
                                                John J. Lee


    The deadline for early bird registration for PyCon DC 2004 is 1 February.
    Expect the Sprint(s) to be a highlight.
	http://www.pycon.org/dc2004/register/

    "An Introduction to the Twisted Networking Framework" is important,
    because Twisted is important, and it's accurate, because Itamar
    Shtull-Trauring knows everything about Twisted.
	http://www.onlamp.com/pub/a/python/2004/01/15/twisted_intro.html

    Denys Duchier makes "Continuations ... simple and illustrated".
	http://www.ps.uni-sb.de/~duchier/python/continuations.html

    "Sussen is a [Python-coded] security scanner which remotely tests
    computers ... on their vulnerabilities."
	http://sussen.sourceforge.net/

    Stephan Diebel updates the status of the Python Success Stories.
	http://groups.google.com/selm=mailman.468.1074441904.12720.python-list%40python.org

    More Python recognition:  among "the best Windows Freeware".
	http://www.pricelessware.org/2004/about2004PL.htm

    Raymond Hettinger codes a Floating Point Simulator class to provide
    executable illustrations of common FP surprises.
	http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/265894

    "The Tk Text Widget" introduces Tkinter's powerhouse Text() (although
    the article is expressed in Tcl rather than Python).
	http://www.linuxjournal.com/article.php?sid=7357

    Roberto Alsina demonstrates how good PyQt programming with Eric3
    can be.
	http://www.pycs.net/lateral/stories/16.html

    Premshree Pillai shares his automation of py2exe use.
	http://www.premshree.resource-locator.com/j/post.php?id=152


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

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

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

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

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

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

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

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

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

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

    Cetus collects Python hyperlinks.
        http://www.cetus-links.org/oo_python.html

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

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

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

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

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

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


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

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


-- The Python-URL! Team--

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



From computer.problemen at skynet.be  Fri Jan  9 03:57:18 2004
From: computer.problemen at skynet.be (broebel)
Date: Fri, 9 Jan 2004 09:57:18 +0100
Subject: python newbie
References: <3ffddcfd$0$16662$ba620e4c@news.skynet.be>
	<9drLb.2088$Wa.188@news-server.bigpond.net.au>
Message-ID: <3ffe6b2d$0$1149$ba620e4c@news.skynet.be>

thanks anthony,

that's what I really wanted to know.

"Anthony Borla" <ajborla at bigpond.com> schreef in bericht
news:9drLb.2088$Wa.188 at news-server.bigpond.net.au...
> "broebel" <computer.problemen at skynet.be> wrote in message
> news:3ffddcfd$0$16662$ba620e4c at news.skynet.be...
> > hey,
> >
> > I'm a newbie in the programming world.
> > I just started and already I'm in a whole lot of problems.
> >
>
> And you'll probably experience a whole host more - welcome to the
wonderful
> world of programming ;) !!!
>
> >
> > first problem is the fact that I started out with a little program
> > who was part of a course but the problem is when I launch
> > the program. I don't have the time to see the result because
> > the screen closes immediately.
> >
> > Can anyone explain what's happening.
> >
> <SNIP CODE>
>
> You are obviously not launching the interpreter from a console window.
Thus,
> launching the interpreter forces a new console window to be opened, your
> program executes, and it then closes because it has finished.
>
> Possible remedies allowing you to view your program's output:
>
> * Launch interpreter as you have been doing, but add a line
>    such as:
>
>        raw_input("Press a key to continue ")
>
>    at the end of your code to prompt for a key press before
>    exiting, and closing the console window
>
> * Start using the intepreter from a console window i.e. start
>    using the command line. All generated output will appear
>    on the same console.
>
>    Since you are in a course [?] I'd recommend asking your
>    instructor about suitable tutorials for doing this
>
> I hope this helps.
>
> Anthony Borla
>
>




From http  Wed Jan 14 02:10:29 2004
From: http (Paul Rubin)
Date: 13 Jan 2004 23:10:29 -0800
Subject: Safe prime numbers in Python
References: <mailman.346.1074062404.12720.python-list@python.org>
Message-ID: <7xd69nm2e2.fsf@ruckus.brouhaha.com>

Tim Churches <tchur at optushome.com.au> writes:
> Does any know of or have Python code (or C or Fortran code wrapped
> as a Python module) for efficiently finding safe prime numbers -
> that is a number p such that p and (p-1)/2 are both prime?

Yeah I have some, I'll see if I can dig it out and post it.  It's
pretty simple actually.


From newsgroups at jhrothjr.com  Mon Jan  5 10:06:59 2004
From: newsgroups at jhrothjr.com (John Roth)
Date: Mon, 5 Jan 2004 10:06:59 -0500
Subject: PRE-PEP: new Path class
Message-ID: <vvivefh35qjv9a@news.supernews.com>

I'm adding a thread for comments on Gerrit Holl's pre-pep, which
can be found here:

http://tinyurl.com/2578q

Frankly, I like the idea. It's about time that all of the file
and directory stuff in the os module got objectified
properly (or at least with some semblance of OO propriety!)

In the issues section:

1) Should path be a subclass of str?

No. Outside of the difficulty of deciding whether it's a
subclass of single byte or unicode strings, it's a pure
and simple case of Feature Envy. Granted, there will
be times a developer wants to use string methods, but
the most common operations should be supported directly.

2) virtual file system extensibility.

No opinion at this time. I'd like to see a couple
of attempts at an implementation first before
settling on a single design.

3) Should the / operator map joinpath.

I agree. No way. In the first place, that's a unixism
(Windows uses \, the Mac uses :) In the second
place it doesn't fit the common use of /, which is
to divide (separate) things. If we want an operator
for join (not a bad idea) I'd suggest using '+'. String
already overloads it for concatenation, and as I said
above, I'd just as soon *not* have this be a subclass
of string.

4) Should path expose an iterator for listdir(?)

I don't see why not, as long as the path is to a
directory.

5) Should == operator be the same as os.path.samefile()?

Why not...

6) Path.open()?

Of course.

7) Should the various gettime methods return Datetime
objects.

Of course.

8) Touch method?

Of course.

9) Current OS constants?

What are they? Are we talking about the four
constants in the access() function, or about something
else?

10) Commonprefix, walk and sameopenfile?

Commonprefix should be a string or list method,
it doesn't fit here.

walk is a nice function, but it should be redone to
use the visitor pattern directly, with different method
names for files, directories and whatever else a
particular file system has in it's warped little mind.

sameopenfile doesn't belong in the os.path module
in the first place. It belongs in the os module under
6.1.3 - File Descriptor Operations.

11) rename join and split.

I wouldn't bother. Since I'm against making it a
subclass of str(), the issue doesn't arise.

12) Should == compare file sizes.

No. Might have a method to do that.

13) chdir, chmod, etc?

No. This has nothing to do with pathname.

14. Unicode filenames

Have to have them on Windows and probably
on the Mac.

15. Should files and directories be the same
class.

Probably not. While they share a lot of common
functionality (which should be spelled out as an
interface) they also have a lot of dissimilar
functionality. Separating them also makes it easy
to create objects for things like symbolic links.

In addition to this, we should have the ability
to update the other times (utime()) directly
using another file or directory object as well
as a Datetime object.

John Roth




From swalters_usenet at yahoo.com  Sun Jan 11 01:09:39 2004
From: swalters_usenet at yahoo.com (Samuel Walters)
Date: Sun, 11 Jan 2004 06:09:39 GMT
Subject: Python is far from a top performer according to benchmark
	test...
References: <ryELb.238$tK2.228@amstwist00> <btn5db$2f8$1@absinth.dialog.net.pl>
	<pan.2004.01.09.21.35.40.132608@yahoo.com>
	<6ee58e07.0401092129.302cb9d4@posting.google.com>
Message-ID: <pan.2004.01.11.06.08.18.867825@yahoo.com>

|Thus Spake Lothar Scholz On the now historical date of Fri, 09 Jan 2004
21:29:56 -0800|

> Samuel Walters <swalters_usenet at yahoo.com> wrote in message
> news:<pan.2004.01.09.21.35.40.132608 at yahoo.com>...
> 
>> For numerical processing, C is the right tool,
> 
> Definitely not, you don't want a pointer language when using numerical
> processing: use Fortran.

Hmm.  I feel misunderstood.  I'm going to try to clarify, but if I'm the
one doing the misunderstanding, feel free to give me a good old-fashioned
usenet style bitchslapping back to the stone age.

First off:  Truth in advertising.
I know very little about numeric processing, and even less about Fortran.
It's true that my background is in mathematics, but in *pure* mathematics
where pointer-based languages tend to be helpful, not hurtful.  I chose
pure mathematics precisely because it eschews the grubby sort of shortcuts
that applied mathematics uses.  In other words, I didn't have the proper
sort of mathematical intuition for it, so I chose pure, where my kind of
intuition works well. (In the end, this was to my detriment.  All the
interesting problems are in applied math!)

As I see it, when one considers which language is best for one's needs,
one considers a couple of things:

	1)  Does the language have the semantics I want. 
	2)  Does the language have the primitives I need. 
	3)  Can I *easily* build any missing or	suboptimal primitives.

One would assume that Fortran has the proper semantics for numerical
processing because it seems to have been wildly successful for a long
period of time.  It would appear that Python has the proper semantics for
numerical processing because a significant number of people are using it
for that, and they'd be using something else if Python caused them too
many headaches.

Fortran naturally comes with the primitives for numerical processing,
because numerical processing is its stated goal. ("FORmula TRANslation") 
Python doesn't seem to have the native and optimal primitives for
numerical processing, so that leads to point three.

Whether one uses Fortran, Python, or any other language, all primitives
are eventually implemented in either C or assembly.  At some point or
another, we end up scraping bare metal and silicon to get our answers.  
The question then becomes, "How easily can I extend this language to fit
my needs."  NumPy is evidence that at least a few people said "Easily
enough."  I don't know how extensible Fortran is, but I would guess "very"
since I've heard of it being applied in many domains other than numerical
processing.  (OpenFirmware, for example.)

So, I guess that my point is that C might not be the right language for
doing numerical processing, but it seems the right language for
implementing the primitives of numerical processing.  Those primitives
should, of course, be designed in such a manner that their behaviors are
not muddied by pointer issues.

Moving on:
I think Python's strength flows from the three criterion for choosing a
language.  It's semantics seem to naturally fit the way a programmer
thinks about problems.  All the algorithmic primitives are there for
naturally expressing one's self easily.  Where the primitives don't exist,
it's easy to bind outside primitives into the system seamlessly.  One of
the joy's of python is that c extension libraries almost never feel bolted
on.  They feel like an intimate part of the language itself.  Part of that
is the blood, sweat and tears of the library implementors, but much of it
is also the elegance of Python.

As far as the straw-poll goes, I think it's a good question to ask, and
that the answer is important, but we also need to figure out where else we
can ask this question.  The problem with asking such a question solely on 
c.l.p is that everyone here has either decided that optimization in python
isn't enough of an issue to bother them, or hasn't made up their
mind yet.  Those who have decided that optimization in python is a problem
have already gone elsewhere.  Perhaps a better question to ask is "Who has
decided that Python is too slow for their needs, what prompted that
decision and are the issues they had worth addressing?"

Sam Walters.


-- 
Never forget the halloween documents.
http://www.opensource.org/halloween/
""" Where will Microsoft try to drag you today?
    Do you really want to go there?"""



From alan.gauld at btinternet.com  Sat Jan 10 04:02:42 2004
From: alan.gauld at btinternet.com (Alan Gauld)
Date: Sat, 10 Jan 2004 09:02:42 GMT
Subject: Debugging Python
References: <mailman.215.1073656414.12720.python-list@python.org>
	<3FFEBDBC.2F9DFD03@engcorp.com>
	<xqxllohbejp.fsf@cola2.ca.boeing.com>
Message-ID: <3fffbe99.486050433@news.blueyonder.co.uk>

On Fri, 9 Jan 2004 10:29:46 GMT, Harry George
<harry.g.george at boeing.com> wrote:
> > I'm not sure about others, but when I design and code using test-driven 
> > development (TDD), I tend not to need to debug almost ever.  

> told him almost exactly what you said: If you are doing test-based
> (whether or not it is with someojne else and thus Agile), you don't
> get into those grim debug sessions that are part of life in C/C++
> land.

Interesting comments. How do people generally perform these tests
then? My primary test tool, for low level testing, is usually the
debugger. Batch mode debugging is something I've been doing since
I worked on VAX/VMS systems and its seems as natural as breathing
to me. Its easy to save a test session and run it later etc. How
else do you test code at a low level?

Or does using the debugger as a test harness not count as
debugging?

Alan g
Author of the Learn to Program website
http://www.freenetpages.co.uk/hp/alan.gauld


From latex-bugs at latex-project.org  Fri Jan 30 10:24:49 2004
From: latex-bugs at latex-project.org (latex-bugs at latex-project.org)
Date: Fri, 30 Jan 2004 16:24:49 +0100 (CET)
Subject: hello
In-Reply-To: <200401301524.i0UFOSZ4003976@rzdspc1.informatik.uni-hamburg.de>
References: <200401301524.i0UFOSZ4003976@rzdspc1.informatik.uni-hamburg.de>
Message-ID: <200401301524.i0UFOnKO024228@sun.dante.de>

Thank you for your message to latex-bugs at latex-project.org.

Sorry, but the latex-bugs email processor cannot handle
MIME attachments. Please resend your problem report with
the contents of latexbug.msg as the body of your message.

-- 



From skip at pobox.com  Wed Jan 14 11:37:42 2004
From: skip at pobox.com (Skip Montanaro)
Date: Wed, 14 Jan 2004 10:37:42 -0600
Subject: Time diff
In-Reply-To: <40056c83$1@clarion.carno.net.au>
References: <40056c83$1@clarion.carno.net.au>
Message-ID: <16389.28758.703030.371512@montanaro.dyndns.org>


    Steve> I have two time strings:

    Steve> 2004-01-14 19:17:37,  and  2004-01-15 01:45:33

    Steve> How can I find out the number of minutes/seconds between the two
    Steve> times in python?

    >>> import datetime
    >>> help(datetime)

    Help on module datetime:

    NAME
        datetime - Fast implementation of the datetime type.

    FILE
        /usr/local/lib/python2.3/lib-dynload/datetime.so

    CLASSES
        __builtin__.object
            date
                datetime
            time
            timedelta
            tzinfo

        class date(__builtin__.object)
         |  Basic date type.
    ...

or

    http://www.python.org/dev/doc/devel/lib/module-datetime.html

Skip



From anton at vredegoor.doge.nl  Wed Jan  7 00:44:29 2004
From: anton at vredegoor.doge.nl (Anton Vredegoor)
Date: Wed, 07 Jan 2004 06:44:29 +0100
Subject: Iterating over a binary file
References: <btf5j8$6g26f$1@ID-46268.news.uni-berlin.de>
	<7xznd04ww1.fsf@ruckus.brouhaha.com>
	<du7ptdwsq1t.fsf@lehtori.cc.tut.fi>
	<7xd69wy5zq.fsf@ruckus.brouhaha.com>
Message-ID: <3ffb9f21$0$1547$3a628fcd@reader2.nntp.hccnet.nl>

Paul Rubin <http://phr.cx at NOSPAM.invalid> wrote:

>    Statement                              Reading difficulty
>    =========                              ==================
>
>       f = file(filename, 'rb')                    1
>       while len(data := f.read(1024)) > 0:        2
>         someobj.update(data)                      1
>       f.close()                                   1
>
>
>    Total reading difficulty:                      5

In Python it can be done even simpler than in C, by making the
"someobj.update" method return the length of the data:

#derek.py

class X:
    
    def update(self,data): 
        #print a chunk and a space
        print data,
        return len(data)

def test():
    x = X()
    f = file('derek.py','rb')
    while x.update(f.read(1)):
        pass
    f.close()

if __name__=='__main__':
    test()

IMHO the generator solution proposed earlier is more natural to some
(all?) Python programmers.

Anton


From ptmcg at users.sourceforge.net  Thu Jan 15 12:02:26 2004
From: ptmcg at users.sourceforge.net (Paul McGuire)
Date: Thu, 15 Jan 2004 17:02:26 GMT
Subject: parsing c-code
References: <mailman.368.1074113221.12720.python-list@python.org>
Message-ID: <CIzNb.711$3j1.164@be1.texas.rr.com>

"John Benson" <jsbenson at bensonsystems.com> wrote in message
news:mailman.368.1074113221.12720.python-list at python.org...
> I'm currently making my way through Thomas Christopher's Python
Programming
> Patterns which describes an LL(k) parser generator that might be of help.
I
> know there are other Python parsing tools out there as well, per Chapter
15
> of the Python Cookbook.
>
> Message: 4
> Date: Wed, 14 Jan 2004 09:27:55 +0100
> From: "tm" <js.bach at web.de>
> Subject: Parsing c-code
> To: python-list at python.org
> Message-ID: <bu2uoj$8pc$1 at piggy.rz.tu-ilmenau.de>
>
> Hello,
>
> are there recommended modules for parsing c-code.
> I want to read in c-structs and display it in a tree graphic.
>
> --
> Torsten
>
If your c-structs aren't too complicated, try this (uses pyparsing, from
http://pyparsing.sourceforge.net):

from pyparsing import Optional, Word, Literal, Forward, alphas, nums, Group,
ZeroOrMore, oneOf, delimitedList, cStyleComment, restOfLine
import pprint

cstructBNF = None
def getCStructBNF():
    global cstructBNF
    if cstructBNF is None:
        structDecl = Forward()
        ident = Word( alphas+"_", alphas+nums+"_$" )
        integer = Word( nums )
        semi = Literal(";").suppress()

        typeName = ident
        varName = ident
        arraySizeSpecifier = integer | ident  # <- should really support an
expression here, but keep simple for now
        typeSpec = Optional("unsigned") + oneOf("int long short double char
void")
        bitfieldspec = ":" + arraySizeSpecifier
        varnamespec = Group( Optional("*", default="") + varName +
Optional( bitfieldspec | ( "[" + arraySizeSpecifier + "]" ) ) )
        memberDecl = Group( ( typeSpec | typeName ) + Group(
delimitedList( varnamespec ) )
                            + semi ) | structDecl

        structDecl << Group( "struct" + Optional(ident) + "{" +
ZeroOrMore( memberDecl ) + "}" + Optional(varnamespec) + semi )

        cstructBNF = structDecl

        cplusplusLineComment = Literal("//") + restOfLine

        cstructBNF.ignore( cStyleComment )  # never know where these will
crop up!
        cstructBNF.ignore( cplusplusLineComment )  # or these either

    return cstructBNF


testData1 = """
    struct {
        long a;
        short b;
        char c[32];
        } a;
"""

testData2 = """
    struct {
        long a;
        struct {
            int x;
            int y;
            } pt;  // this is an embedded struct
        struct {
            int x,y;
            } pt2;
        struct {
            int x;
            int y;
            }* coordPtr; /* this is just a pointer to a struct */
        short b;
        char c[32];
        char d[MAX_LENGTH /* + 1 to make room for terminating null */ ];
        char* name;
        char *name2;  /* no one can agree where the '*' should go */
        int bitfield:5;  /* this is rare, but not hard to add to parse
grammar */
        int bitfield2:BIT2LEN;
        void* otherData;
        } a;
"""

for testdata in (testData1, testData2):
    pprint.pprint( getCStructBNF().parseString(testdata).asList() )
    print







From achrist at easystreet.com  Fri Jan 30 22:01:27 2004
From: achrist at easystreet.com (achrist at easystreet.com)
Date: Fri, 30 Jan 2004 19:01:27 -0800
Subject: PEP 327: Decimal Data Type
References: <mailman.1036.1075467073.12720.python-list@python.org>
	<6ltk10h30riel0lghd18t5unjco2g26spi@4ax.com>
Message-ID: <401B1A87.639CD971@easystreet.com>

Stephen Horne wrote:
> 
> I don't know what the solution should be, but I do think it needs to
> be considered.
> 

The C and C++ people have agreed.  The next standards for those
languages, whenever they come out, are supposed to include decimal
floating point as a standard data type.   The number of decimal 
places required is also profuse, something up around 25-30 places,
more than current hardware, eg IBM mainframes, supports.

If python adds decimal data, it probably ought to be consistent with C
and C++.  Otherwise, the C and C++ guys will have a dreadful time
writing emulation code to run on computers built to support python.


Al


From glennrp at comcast.net  Mon Jan 26 11:20:47 2004
From: glennrp at comcast.net (Glenn Randers-Pehrson)
Date: Mon, 26 Jan 2004 11:20:47 -0500
Subject: [GM-apis] JPG - PNG conversion problem
In-Reply-To: <971323274247EB44B9A01D0A3B424C85058496FD@FTWMLVEM02.e2k.ad
	.ge.com>
Message-ID: <3.0.6.32.20040126112047.010b69a0@mail.comcast.net>

At 08:01 AM 1/26/04 -0600, Raaijmakers, Vincent \(GE Infrastructure\) wrote:
>Who can explain the huge increase in size when I convert a JPG into a PNG format using PythonMagick:

JPEG offers more effective compression than PNG, when the source is a video
or camera image.

Glenn



From tim at remove_if_not_spam.digitig.co.uk  Tue Jan 13 06:46:07 2004
From: tim at remove_if_not_spam.digitig.co.uk (Tim Rowe)
Date: Tue, 13 Jan 2004 11:46:07 +0000
Subject: Division oddity
References: <ssn3009029rrug3l8dk1pn06tqd019ucld@4ax.com>
	<7xeku5vrn8.fsf@ruckus.brouhaha.com>
Message-ID: <cdm7005r12o3o3f6gngj8no1qh74ul3733@4ax.com>

On 11 Jan 2004 18:15:39 -0800, Paul Rubin
<http://phr.cx at NOSPAM.invalid> wrote:

>Tim Rowe <tim at remove_if_not_spam.digitig.co.uk> writes:
>> If I do from __future__ import division then eval(1/2) gives me 0.5 as
>> expected. But if I do print input("enter a sum: ") and enter 1/2 as
>> the sum I get 0 as if I hadn't done the import.  I thought input was
>> supposed to give the same behaviour as an eval on raw input -- why the
>> difference here?
>
>The input function is calling eval from the context of the module
>where 'input' itself is defined.  If you use "from __future__ import
>division" in module A and have "print 3/2" in module B, the value of
>3/2 in module B shouldn't be affected by the input, since module B
>may depend on integer division having the old behavior.

That makes sense, thanks.

>The result is a little bit surprising at first glance though, so it
>should probably be documented.

Well, the documentation for "input()" says "Equivalent to
eval(raw_input(/prompt/))". Perhaps it should say "/Usually/
equivalent...."


From ashleylloyd at hotmail.com  Wed Jan  7 05:13:00 2004
From: ashleylloyd at hotmail.com (Ashley Lloyd)
Date: Wed, 07 Jan 2004 10:13:00 +0000
Subject: Newbie: Python equivalent to Delphi TTable
Message-ID: <BAY99-F60HTUAYHCb6s0002e876@hotmail.com>

Hi all,

I don't know how many of you are very familiar with Delphi, but we're 
looking for anything that offers the user a similar kind of interface to an 
Interbase table as Delphi components TTable, TIBOTable, etc (findkey, etc). 
If anyone knows of anything allowing us to do this, I'd be grateful.

Sorry that this no doubt sounds a little vague, I just can't really explain 
it any better!

TIA

Ashley

_________________________________________________________________
It's fast, it's easy and it's free. Get MSN Messenger today! 
http://www.msn.co.uk/messenger




From jzgoda at gazeta.usun.pl  Wed Jan 14 15:52:10 2004
From: jzgoda at gazeta.usun.pl (Jarek Zgoda)
Date: Wed, 14 Jan 2004 20:52:10 +0000 (UTC)
Subject: wxPython worries
References: <mailman.352.1074092092.12720.python-list@python.org>
Message-ID: <bu4a5n$k9$6@atlantis.news.tpi.pl>

James Goldwater <james at eccehomo.co.uk> pisze:

> The target is Win32 for now (98 - XP). Now, if it were up to me, I'd use 
> Delphi - it's what I know best.  But I'm working with a less experienced 
> developer with whom I have no languages in common.  He's keen to get 
> started on C#, I've toyed with C# and though it looks easy, I don't see 
> any major gains over what I already know.

I love Delphi but I would choose Python for simplicity, flexibility and
library (will not mention that it works on AS/400, the best
minicomputer(!) ever made).

But I'm rather guerilla guy and mainstream makes me sick.

(NP: The Pogues - Sally MacLennane)

-- 
Jarek Zgoda
Unregistered Linux User #-1
http://www.zgoda.biz/ JID:zgoda-a-chrome.pl http://zgoda.jogger.pl/


From cygnus at cprogrammer.org  Fri Jan 23 13:44:00 2004
From: cygnus at cprogrammer.org (Jonathan Daugherty)
Date: Fri, 23 Jan 2004 13:44:00 -0500
Subject: [OPINION] - does language really matter if they all do the same
	thing?
In-Reply-To: <20040123183127.GA35281@mail.hitmedia.com>
References: <20040123183127.GA35281@mail.hitmedia.com>
Message-ID: <20040123184400.GA8164@mail.theserver.ath.cx>

# Are programming languages like spoken languages, in the sense
# that they all say the same things, just using different words?

I don't think so.  Programming languages affect the way people
think about problem solving in different ways.  The capacity to
solve problems is one of the most important capacities a
programmer can expect to have.  In addition, it is the
responsibility of the programmer to see that some languages are,
by virtue of their design, made to solve certain problems in
certain ways, under various definitions of program flow, data
storage, etc.  To suppose that all programming languages are,
as you might put it, fundamentally equivalent is to suppose
that english and arabic are, in the same sense, just two sides
of the same coin, which is a gross oversimplification of the
matter and a disrespect to the qualities of the languages
that make them distinct.  On a more conjectural note, spoken
languages are more than just ways of expressing ideas; by
virtue of being evolving systems of communication, they serve
as an insight into the culture and people that developed
them.  Programming languages are the same in that respect.

-- 

  Jonathan Daugherty
  http://www.cprogrammer.org

  "It's a book about a Spanish guy called Manual, you should read it."
                                                            -- Dilbert



From mark at mceahern.com  Sun Jan 18 19:57:45 2004
From: mark at mceahern.com (Mark McEahern)
Date: Sun, 18 Jan 2004 18:57:45 -0600
Subject: How to call a system command with flexibility on Windows
In-Reply-To: <bu7h4j$2d9k$2@arachne.labyrinth.net.au>
References: <4aEMb.1798$PK6.17978@nnrp1.uunet.ca>
	<bu7h4j$2d9k$2@arachne.labyrinth.net.au>
Message-ID: <1074473865.5354.9.camel@dev.internal>

On Thu, 2004-01-15 at 20:09, Mark Hammond wrote:
> Some, if not all of the popen functions on Windows will return the exit 
> code of the program when closing the last returned handle.  I'm afraid I 
> have no time to check the docs or find sample code, but it does work :)

I believe os.popen does on both cygwin and plain windows; e.g.,

  cmd = 'some command'
  stdout = os.popen(cmd)
  print stdout.read()
  exitCode = stdout.close()
  if exitCode:
      print '%s failed, this probably says why:\n%s' % (cmd, stdout)

Although I suppose spelling it "stdout" is misleading--doesn't popen
return stdout/stderr combined?

Cheers,

// m




From elainejackson7355 at home.com  Thu Jan 29 20:05:16 2004
From: elainejackson7355 at home.com (Elaine Jackson)
Date: Fri, 30 Jan 2004 01:05:16 GMT
Subject: number of arguments a function takes
References: <CSaSb.329909$ts4.189798@pd7tw3no>
	<Xns947FAE6461014duncanrcpcouk@127.0.0.1>
	<YVbSb.319671$JQ1.192347@pd7tw1no>
	<a8623416.0401291606.1fa4de31@posting.google.com>
Message-ID: <g5iSb.334469$ts4.14885@pd7tw3no>

I think you're expectations of this are a little high. It's just something I did
for amusement while I was drinking my coffee this morning. Anyway, here it is.
And yes, I'd be very interested to see your code.

Peace (code follows)

NEG = lambda A: not A
CONJ = lambda *args: False not in args
DISJ = lambda *args: True in args
IMPL = lambda A,B: (not A) or B
EQUIV   = lambda A,B: (A and B) or (not A and not B)

def truthTable(boolFunct):
    assignmentList = lambda numArgs: (numArgs==0 and [[]]) or \
        reduce(list.__add__,[[X+[False],X+[True]] for X in
assignmentList(numArgs-1)])
    import inspect
    numArgs=len(inspect.getargspec(boolFunct)[0])
    for assignment in assignmentList(numArgs):
        print assignment," : ",boolFunct(*assignment)

## EXAMPLE:
f = lambda x,y,z: DISJ(CONJ(x,y),NEG(z))
truthTable(f)


"Corey Coughlin" <corey.coughlin at attbi.com> wrote in message
news:a8623416.0401291606.1fa4de31 at posting.google.com...
| "Elaine Jackson" <elainejackson7355 at home.com> wrote in message
news:<YVbSb.319671$JQ1.192347 at pd7tw1no>...
| > Exactly what I was looking for. Thank you very much.
| >
| > "Duncan Booth" <me at privacy.net> wrote in message
| > news:Xns947FAE6461014duncanrcpcouk at 127.0.0.1...
| > | "Elaine Jackson" <elainejackson7355 at home.com> wrote in
| > | news:CSaSb.329909$ts4.189798 at pd7tw3no:
| > |
| > | > Suppose one of the arguments of a function f_1 is another function
| > | > f_2. Can f_1 access the number of arguments taken by f_2?  (I'm
| > | > writing a little script to automate the construction of logical
| > | > truth-tables.)  Thanks.
| > |
| > | Look at the inspect module, in particular you probably want
| > | inspect.getargspec:
| > |
| > | >>> import inspect
| > | >>> def f(a,b): pass
| >
| > | >>> inspect.getargspec(f)
| >  (['a', 'b'], None, None, None)
| > | >>> help(inspect.getargspec)
| > | Help on function getargspec in module inspect:
| > |
| > | getargspec(func)
| > |     Get the names and default values of a function's arguments.
| > |
| > |     A tuple of four things is returned: (args, varargs, varkw, defaults).
| > |     'args' is a list of the argument names (it may contain nested lists).
| > |     'varargs' and 'varkw' are the names of the * and ** arguments or None.
| > |     'defaults' is an n-tuple of the default values of the last n
arguments.
| > |
| > | >>>
|
| So you're working on a truth table program?  I have a truth table
| object I did for my own application, more focused on finding
| input/output transitions in arbitrary truth tables, but if you're
| interested, let me know.  Regardless, are you working on something
| that will ultimately become public?  If so, be sure to announce it
| when you're done, I'd love to have a look.  Especially if you're doing
| anything with functional simplification, my object can return a simple
| SOP function for a table (reducing out unused inputs is also an
| option) but they can get kind of lengthy for complicated functions.
| And if you need any other help, be sure to let me know!




From theller at python.net  Fri Jan 30 09:03:31 2004
From: theller at python.net (Thomas Heller)
Date: Fri, 30 Jan 2004 15:03:31 +0100
Subject: Python ODBC Driver Module
References: <bvdnl9$3k2$06$1@news.t-online.com>
Message-ID: <smhxcz4c.fsf@python.net>

"Mark Buch" <mark.buch at t-online.de> writes:

> Hi,
>
> where can i find a freeware python odbc module for windows?

win32all contains one.  It's named odbc, iirc.

Thomas


From FBatista at uniFON.com.ar  Thu Jan 22 11:46:23 2004
From: FBatista at uniFON.com.ar (Batista, Facundo)
Date: Thu, 22 Jan 2004 13:46:23 -0300
Subject: MySQL interface problem
Message-ID: <A128D751272CD411BC9200508BC2194D0338351A@escpl.tcp.com.ar>

I'm trying to get the warnings from the last 'insert....' sql statement I
send to the database and the conn.info() method returns always None.

I'm using Python 2.2.3 with _mysql 0.9.2.

There's a newer release that do this? Another interface? I'm doing something
wrong?

Thank you!

Facundo Batista
Gesti?n de Red
fbatista at unifon.com.ar
(54 11) 5130-4643
Cel: 15 5132 0132







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From mark at mceahern.com  Sat Jan  3 16:01:24 2004
From: mark at mceahern.com (Mark McEahern)
Date: Sat, 03 Jan 2004 15:01:24 -0600
Subject: importing
In-Reply-To: <231bc96c.0401031249.12cff6d7@posting.google.com>
References: <231bc96c.0401031249.12cff6d7@posting.google.com>
Message-ID: <1073163684.12941.3.camel@dev.internal>

On Sat, 2004-01-03 at 14:49, Boomer wrote:
> here's the error
> 
> Traceback (innermost last):
>   File "<string>", line 5, in ?
> AttributeError: 'string' object has no attribute 'split'

Try this from that program:

import sys
print sys.version

What does it say?

// m




From miki.tebeka at zoran.com  Mon Jan  5 02:07:22 2004
From: miki.tebeka at zoran.com (Miki Tebeka)
Date: 4 Jan 2004 23:07:22 -0800
Subject: Python for Embedded Devices?
References: <efa6f675.0401021920.3bffced0@posting.google.com>
	<vvdl0nbogvm74@corp.supernews.com>
	<221e7b06.0401041537.2896b22d@posting.google.com>
Message-ID: <4f0a9fdb.0401042307.1f6bd4e8@posting.google.com>

Hello Phil,

> I've looked at Io, Lua, PyMite and Pippy, to name a few, and none are
> quite appropriate. Io is perhaps the closest match, if it were
> stripped down a lot.
Have you looked at tinyscheme? It a full scheme interpreter in one C file.
http://tinyscheme.sourceforge.net/home.html

> I have been tinkering around with some ideas to make a new language to
> fit the environment I deal with. This is slow work, as I haven't a lot
> of time to spend on it, and I am not a language design expert, but I'm
> having fun with it!
Maybe you can work with Fredrik Lundh on Pytte (http://effbot.org/zone/pytte.htm)

HTH.
Miki


From h.b.furuseth at usit.uio.no  Mon Jan  5 12:33:35 2004
From: h.b.furuseth at usit.uio.no (Hallvard B Furuseth (nospam nospam))
Date: 05 Jan 2004 18:33:35 +0100
Subject: Get UID of username
References: <btc65f$i3l$01$1@news.t-online.com>
Message-ID: <HBF.20040105wbx2@bombur.uio.no>

Florian Lindner wrote:

> how can I find out the UID of a username on a linux system?

from pwd import getpwnam
try:
    print getpwnam('someuser')[2]
except KeyError:
    pass

See <http://www.python.org/doc/current/lib/module-pwd.html>.

-- 
Hallvard


From donn at drizzle.com  Sat Jan  3 23:39:08 2004
From: donn at drizzle.com (Donn Cave)
Date: Sun, 04 Jan 2004 04:39:08 -0000
Subject: [Python-Dev] PEP 324: popen5 - New POSIX process module
References: <Pine.LNX.4.44.0401032302210.778-100000@aristocat.lysator.liu.se>
	<mailman.60.1073175311.12720.python-list@python.org>
Message-ID: <1073191147.43307@yasure>

Quoth "Martin v. Loewis" <martin at v.loewis.de>:
...
| Errors should never pass silently.

Which reminds me, this is a much stickier problem if you take
into account errors that happen _after_ the fork.

It can be highly useful to account for them, though.  In my
own process handling functions, I give myself the option, and
the function I nearly always use is the one that raises an
exception if the command exits with an error;  the value of
the error comes from unit 2 (a.k.a. stderr, though of course
not actually stderr since it would be foolish to use a file
object here instead of a file descriptor.)

I haven't looked at the proposed module, would suggest that it
be placed on a web page so people can do so conveniently.  In
my experience, attempts like this (including my own) tend to
founder on the inherent complexity of the problem, failing to
provide an interface that is simple and obvious enough to be
generally useful.

	Donn Cave, donn at drizzle.com


From arjen.dijkstra%no%-%spam% at hccnet.nl  Mon Jan 19 13:35:58 2004
From: arjen.dijkstra%no%-%spam% at hccnet.nl (duikboot)
Date: Mon, 19 Jan 2004 19:35:58 +0100
Subject: Oracle to Mysql, I'm (still) lost...
References: <mailman.499.1074515814.12720.python-list@python.org>
Message-ID: <pan.2004.01.19.18.35.55.271012@hccnet.nl>

It worked beautiful, thank you.

On Mon, 19 Jan 2004 13:44:11 +0100, Marc Boeren wrote:

> 
> Hi,
> 
> instead of
> 
>>     cursMy.execute("insert into %s values %s", (tabel, a_oracle))
> 
> Try:
> 
> sql = "insert into "+ tabel +" values ("
> comma = ""
> for value in a_oracle:
>     sql+= comma + "%s"
>     comma = ", "
> sql+= ")"
> 
> or better:
> 
> sql = "insert into %s values (" % tabel
> sql+= ", ".join(["%s"] * len(a_oracle))
> sql+= ")" 
> cursMy.execute(sql, a_oracle)
> 
> which does the same thing.
> 
> Your original sql-statement looked (for the execute call) like it needed two
> (sql-style)parameters, when in fact it needs as much parameters as there are
> fields in the table. And, the table-name is not an sql-parameter, it is just
> something that needs filling in...
> 
> Hope this helps,
> 
> Cheerio, Marc.



From mirandacascade at yahoo.com  Fri Jan 23 16:29:38 2004
From: mirandacascade at yahoo.com (Miranda Evans)
Date: 23 Jan 2004 13:29:38 -0800
Subject: progress bar
Message-ID: <59e5b87.0401231329.6e084d6f@posting.google.com>

OS: Win2K
Python version: 2.2

Seeking references to documentation that discuss how a python script
can handle displaying a progress bar.  Also, if you are aware of any
sample code that illustrates this, I'm interested in looking at that
sample code.

Are there ways to accomplish this that do not involve using a
full-featured GUI toolkit like Tkinter or wxPython or PythonCard?


From na  Sun Jan  4 20:35:11 2004
From: na (Andrew)
Date: Sun, 4 Jan 2004 17:35:11 -0800
Subject: mysql python Newbie Question
References: <vvc80lb8mstue1@corp.supernews.com>
	<slrnbvea97.33b.davecook@localhost.localdomain>
Message-ID: <vvergt26kp8gf8@corp.supernews.com>

Hi everyone and thank you for replying to my post

My question was answered I need the python mysql modules for my program from
what I understand

I was just interested in building an app that could connect to my server and
edit records in my database through a Graphical User Interface

As for not knowing sql:
I have a good grasp on MySQL although I am not the best I could be I know
where to look for the information. Basically I could do the things I needed
for my application

what my question should have been:

how do I connect to a DB server that is not on my computer through python to
access my records.

from What I understand I need to look at the Python Mysql documentation (If
there is any) and build from there

If there are any other modules or documentation I need to look at please let
me know

Thank You

Andrew




From jl at windsmith.net  Fri Jan 16 08:50:08 2004
From: jl at windsmith.net (John Lull)
Date: 16 Jan 2004 07:50:08 -0600
Subject: Multithreaded COM server problem...
References: <5a90009ufdd66okc8osajrn1a5kokp86mk@4ax.com>
	<btpug4$1oag$1@arachne.labyrinth.net.au>
	<gdv100hgp4tgnclf0c4a4nlr58npi5q3ir@4ax.com>
	<bttcff$qs1$1@arachne.labyrinth.net.au>
	<0pr700ddfdf3op14oulk7u82cthaped040@4ax.com>
	<bu7h15$2d9k$1@arachne.labyrinth.net.au>
Message-ID: <et0f005fm32gh5ovq67bd2e9ihalbiaa9m@4ax.com>

Mark Hammond <mhammond at skippinet.com.au> wrote (with possible
deletions):

> John Lull wrote:
> > Mark Hammond <mhammond at skippinet.com.au> wrote (with possible
> > deletions):
> > 
> > 
> >>John Lull wrote:
> > 
> > ...
> > 
> >>>Unfortunately, this one has to be a local server since it's providing shared
> >>>access to a pool of hardware devices from multiple distributed clients. I've
> >>>carefully reviewed chapters 5 & 12, and appendix D, and wasn't able to find
> >>>anything addressing threading models in the local server in detail. If I've
> >>>missed something, I'd be grateful for any additional hints. 
> >>
> >>The problem is that your client code is not running a message loop.  If 
> >>you change the loop of your client test code to something like:
> >>
> >>for i in range(delay)*10:
> >>     time.sleep(0.1)
> >>     pythoncom.PumpWaitingMessages()
> >>
> >>It works as you expect.  A better choice would probably be 
> >>win32event.MsgWaitForMultipleObjects, but that depends on what your app 
> >>really does.
> >>
> >>Mark.
> > 
> > 
> > I presume you meant my server code. 
> 
> Nope - I meant the client.  The server is already running such a loop 
> thank to localserver.py, which is hosting the object.
> 
> The client code's main (and only) thread is blocked in a system call, 
> but it appears COM wants it to pump messages so the marshalling magic 
> happens.  I can only speculate why COM needs this to happen in this 
> trivial case, but COM's rules do state this requirement.

Now I'm *really* confused.

Perhaps I need to clarify a bit. The sleep() method in my sample
server is a perhaps-too-simplified substitute for what the real server
is doing. It provides a variety of high-level operations on a piece of
hardware. Some of the operations take as long as several dozen
seconds, others take a millisecond or so. I need the client to block
waiting for completion of each operation, regardless of how long the
operation takes. I cannot break one of the long operations up into a
series of calls from the client -- it must be implemented as a single
call. My example would, perhaps, have been clearer if I'd named the
method someLongRunningMethod() instead of sleep().

I've tried doing roughly what you suggested inside my test client,
calling PumpWaitingMessages() both before and after each COM
operation. That still leaves me with the same basic problem -- inside
the server, all of my COM objects are created on the server's main
thread, instead of on a separate thread for each client. That leaves
all COM operations serialized through that single thread. My test
client at the moment looks like this:

  import sys
  from pythoncom import PumpWaitingMessages
  from win32com.client import Dispatch

  PumpWaitingMessages()
  app=Dispatch('PyComThreads.Application')
  PumpWaitingMessages()
  app.someLongRunningMethod(20)
  PumpWaitingMessages()

If this is not essentially what you meant, could you please let me
know? The server is exactly like I had posted originally, except for
renaming its sleep() method to someLongRunningMethod().


> That sucks, and is almost certainly a thread-state error.

That was my thought.


Thanks.

Regards,
John


From tjreedy at udel.edu  Tue Jan 27 17:26:07 2004
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 27 Jan 2004 17:26:07 -0500
Subject: raw_input - why doesn't prompt go to stderr
References: <bv2smu$leh$1@nets3.rz.RWTH-Aachen.DE><mailman.816.1075154097.12720.python-list@python.org>
	<4016A585.6050109@skynet.be>
Message-ID: <bv6ohg$obe$1@sea.gmane.org>


"Helmut Jarausch" <jarausch at skynet.be> wrote in message
news:4016A585.6050109 at skynet.be...
> Ofcourse I did the redirection of stdout.

Since a program author can easily do so, as has been posted more than once
over the years, the question was real.  In fact, the addition of '>>ofile'
to print statements was intended to make such redirection less common.

> And this is very handy.
> While testing I don't redirect stdout and so can see the output
> immediately. Then I just redirect stdout for a 'production' run.
>
> Tell me any advantage in raw_input's prompt is going to stdout instead
> of stderr?

I don't know the ramification of the distinction, expecially across
platforms, well enough to answer.  I can only reiterate my suggestion,
given Python as it is today and will remain for some time, that you print
to 'ofile' with default ofile == sys.stdout but with command line or
interactive redirection.

Terry J. Reedy






From guido at python.org  Thu Jan 15 10:07:01 2004
From: guido at python.org (Guido van Rossum)
Date: Thu, 15 Jan 2004 07:07:01 -0800
Subject: PyCon Reminders (proposal submission ends tonight!)
Message-ID: <200401151507.i0FF72J14249@c-24-5-183-134.client.comcast.net>

Proposal Submission Deadline: Tonight!
--------------------------------------

Tonight at midnight (in *some* timezone :-) is the last time to submit
PyCon proposals.
http://pycon.org/dc2004/cfp/

Early Bird Registration
-----------------------

Deadline for Early Bird Registration: January 31.
*** Speakers, don't forget to register!!!!!! ***
http://pycon.org/dc2004/register/

Sprint pre-announcement
-----------------------

Come a few days early and participate in a coding sprint.  Sprints are
free (courtesy of the PSF!), and are held from Saturday March 20
through Tuesday March 23 (i.e. the four days leading up to the
conference).
http://pycon.org/dc2004 .

Volunteers
----------

We're looking for volunteers to help run PyCon.
http://mail.python.org/mailman/listinfo/pycon-organizers

About PyCon
-----------

PyCon DC 2004 will be held March 24-26, 2004 in Washington, D.C.
Keynote speaker is Mitch Kapor of the Open Source Applications
Foundation (http://www.osafoundation.org/).

Don't miss any PyCon announcements!  Subscribe to
http://mail.python.org/mailman/listinfo/pycon-announce

You can discuss PyCon with other interested people by subscribing to
http://mail.python.org/mailman/listinfo/pycon-interest

The central resource for PyCon DC 2004 is http://www.pycon.org/

Pictures from last year's PyCon:
http://www.python.org/cgi-bin/moinmoin/PyConPhotos

I'm looking forward to seeing you all in DC in March!!!

--Guido van Rossum (home page: http://www.python.org/~guido/)

Open Source Awards: http://builder.com.com/5100-6375_14-5136758.html



From tdelaney at avaya.com  Sun Jan 11 23:53:58 2004
From: tdelaney at avaya.com (Delaney, Timothy C (Timothy))
Date: Mon, 12 Jan 2004 15:53:58 +1100
Subject: exceptions
Message-ID: <338366A6D2E2CA4C9DAEAE652E12A1DE01063A94@au3010avexu1.global.avaya.com>

> From: Elaine Jackson
> 
> Could someone give me a hint regarding exceptions? 
> Specifically, how you handle
> different exceptions with different blocks of code? All I 
> know how to do now is
> to follow "raise" with a string (and even that is now 
> deprecated, apparently).

http://www.python.org/doc/current/tut/node10.html

>From the Python web site:

Home
    Beginners Guide (Documentation)
        Python for (Non-)Programmers
            Python Tutorial

Tim Delaney



From __peter__ at web.de  Sat Jan 10 07:05:19 2004
From: __peter__ at web.de (Peter Otten)
Date: Sat, 10 Jan 2004 13:05:19 +0100
Subject: need help translating a PHP for statement to python
References: <a015bde3.0401100050.3e6b58c9@posting.google.com>
	<7xk740go52.fsf@ruckus.brouhaha.com>
Message-ID: <btopil$dg3$01$1@news.t-online.com>

Paul Rubin wrote:

> Python is more verbose than PHP when it comes to stuff like that.

<verbosity.py>
marques = """for ($y = 0, $x = $cx-$cy-1; $y <= $cy; ++$y,++$x) {
    $prd = $q * $y_ar[$y] + $car;
    $prd -= ($car = intval($prd / 1E7)) * 1E7;
    if ($bar = (($x_ar[$x] -= $prd + $bar) < 0)) $x_ar[$x] += 1E7;
    }"""

rubin = """x = cx - cy - 1
for y in xrange(cy+1):
    prd = q * y_ar[y] + car
    car = int(prd / 1E7)
    prd -= car * 1E7
    x_ar[x] -= prd + bar
    bar = x_ar[x] < 0
    if bar:
        x_ar[x] += 1E7
    x += 1"""


if __name__ == "__main__":
    print "The ultimate verbosity check :-)"
    print "PHP", len(marques), "characters"
    print "Python", len(rubin), "characters"
</verbosity.py>

Output:

The ultimate verbosity check :-)
PHP 206 characters
Python 205 characters

Note that I didn't cheat and let

if bar: x_ar[x] += 1E7

spread over two lines, thus deliberately wasting another 8 characters.

Peter



From EP at zomething.com  Thu Jan 22 04:22:11 2004
From: EP at zomething.com (EP)
Date: Thu, 22 Jan 2004 01:22:11 -0800
Subject: a curious IDLE Error
In-Reply-To: <400f8315.60048965@news.blueyonder.co.uk>
References: <8g7u001k257pr6tjl3ng9t7pn3gvbq2328@4ax.com>
	<CEELJPECNGEGKFNDLHFFGEBKCCAA.perry@stsci.edu>
	<mailman.533.1074574795.12720.python-list@python.org>
	<bumghc$dsb$1@nrc-news.nrc.ca>
	<vpmt0058gq2hj2q8jh8pakm9d80eridvmv@4ax.com>
	<mailman.617.1074727375.12720.python-list@python.org>
	<8g7u001k257pr6tjl3ng9t7pn3gvbq2328@4ax.com>
	<mailman.629.1074750632.12720.python-list@python.org>
Message-ID: <5.2.0.9.0.20040122011652.00b7ea80@mail.zomething.com>

At 08:02 AM 1/22/2004 +0000, Alan Gauld wrote:
>On Wed, 21 Jan 2004 21:50:01 -0800, EP <EP at zomething.com> wrote:
>
> > I opened a new Python shell from the instance of IDLE editor where my
> > module was open and tried the raw_input():
> >
> >  >>> someFile=raw_input("enter:  ")
> > Traceback (most recent call last):
> >    File "<pyshell#36>", line 1, in ?
> >      someFile=raw_input("enter:  ")
> > TypeError: 'tuple' object is not callable
> >
>
>This is a long shot but is it possible that you used raw_input as
>the name of a variable somewhere. Thus you are trying to call
>that variable (which apparently holds a tuple!).
>
>Try doing a text search for raw_input in your module code.
>
>Just a thought.


I thought it might have been something like that as well, but I checked all 
my variable names (and I was only importing the string module).

The strange behavior was that the module worked, just not in an IDLE shell 
opened up out of the same instance I created the module in. 




From aahz at pythoncraft.com  Fri Jan 30 21:00:34 2004
From: aahz at pythoncraft.com (Aahz)
Date: 30 Jan 2004 21:00:34 -0500
Subject: Accessing a shared generator from multiple threads.
References: <7934d084.0401152058.164a240c@posting.google.com>
	<400EE6B5.27C6B694@hotmail.com> <bun7cn$le7$1@panix1.panix.com>
	<cab22418.0401220800.1d5f8594@posting.google.com>
Message-ID: <bvf282$eb$1@panix2.panix.com>

In article <cab22418.0401220800.1d5f8594 at posting.google.com>,
Jim Jewett <JimJJewett at yahoo.com> wrote:
>aahz at pythoncraft.com (Aahz) wrote in message news:<bun7cn$le7$1 at panix1.panix.com>...
>>
>> My point is that I haven't (yet) seen many good use cases for sharing a
>> generator between threads, and I'm guessing that many people will try
>> using generators inappropriately for problems that really are better
>> suited to Queue.Queue.
>
>A globally unique ID, such as:
>
>    "What filename should I store this page under?"
>
>The standard library has (several versions of) similar functionality 
>for temporary filenames.  They aren't all threadsafe, they often 
>enforce the "temporary" aspect, they run into hashing collision 
>problems eventually, there is no good way to include even approximate
>ordering information, etc...
>
>The fact that these are in the standard library suggests that it is a
>common use case.  The fact that there are several different versions
>each with their own problems suggests that the problem is hard enough
>to justify putting a good solution in the library.

You've got a good point.  All right, I suggest you subscribe to
python-dev (if you're not) and bring it up there so we can hash out
which location would be best for this functionality.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

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


From candiazoo at comcast.net  Tue Jan 27 07:12:52 2004
From: candiazoo at comcast.net (Michael S. Jessop)
Date: Tue, 27 Jan 2004 12:12:52 GMT
Subject: Seem to be having trouble with Python/Bethon.
References: <PM0003D18B88B36E37@x1-6-00-a0-c9-e7-c3-de.ne1.client2.attbi.com>
	<6a2dnXCsJ60-9Yzd4p2dnA@giganews.com> <1074926701.236022@yasure>
	<PM0003D1B3D06FA06C@x1-6-00-a0-c9-e7-c3-de.ne1.client2.attbi.com>
	<1075053883.217392@yasure>
Message-ID: <8BsRb.166146$na.276860@attbi_s04>

That IS interesting.  :/  Granted my machine was customized to some extent, but
it was basically 5.03 Pro, with BONE and OpenTracker and Mail Daemon
replacement.

I did also install the LibPak.

Mike

In message <1075053883.217392 at yasure>, "Donn Cave" wrote:
> Quoth Michael S. Jessop <candiazoo at comcast.net>:
> | Rebuilt with Net_Server.  Works fine now.
> 
> Thanks, that's interesting.  I would not have guessed that the
> host network implementation could be a factor in the Python
> type/class internals that seemed to be failing for you, so I'm
> guessing that when you choose between the two, there are some
> other things that come along that have nothing to do with the
> network.  I'm actually running a BONE system right now, as I
> type this, and the Python inheritance works fine - Zeta RC1.
> Python+Bethon comes on the CD, but looks like it's the standard
> issue software built on 5.03 (and has a problem with the Zeta
> internationalization software, crashes on exit after I suppose
> it freed something it wasn't supposed to.)
> 
> 	Donn Cave, donn at drizzle.com




From zanesdad at bellsouth.net  Mon Jan 19 17:51:47 2004
From: zanesdad at bellsouth.net (Jeremy Jones)
Date: Mon, 19 Jan 2004 17:51:47 -0500
Subject: Munkware 0.3
In-Reply-To: <400beeb1$1_1@nova.entelchile.net>
References: <mailman.498.1074509063.12720.python-list@python.org>
	<400beeb1$1_1@nova.entelchile.net>
Message-ID: <20040119225147.GA3160@cerberus>

* Rodrigo Benenson (rodrigob at elo.utfsm.cl) wrote:
> as common, using twistedmatrix.com will ease a lot to you to provide remote
> access methods
> 
> rodrigob.
> 

I seriously considered using Twisted (as well as Pyro) as a network interface as
opposed to SOAP, REST, Corba or some home-grown protocol, but I really wanted to
do 2 things:

- create a queueing system that is language independent (so either Corba or some
  web services interface would be better suited for that), just in case folks
who are using the wrong language take a liking to Munkware :-)
- I've been hankering for an opportunity to begin work on a RESTish framework
  and this is as good of a chance as any.  If I am pleased with how it turns
out, I may distill the REST features out and create a second open source project
for it alone.

I'm not intimately familiar with Twisted, so it just may be that Twisted has
provided wrappers for other languages, but that would still leave the fun of
creating my own REST-like framework.

Jeremy Jones



From klapotec at chello.at  Fri Jan 30 13:05:40 2004
From: klapotec at chello.at (Christopher Koppler)
Date: Fri, 30 Jan 2004 18:05:40 GMT
Subject: HowTo Search in nested lists
References: <bve37i$a8h$04$1@news.t-online.com>
Message-ID: <ob5l10lpess6avtcflbd87ovg5guurs84l@4ax.com>

On Fri, 30 Jan 2004 18:11:12 +0100, Florian Lindner
<Florian.Lindner at xgm.de> wrote:

>Hello,
>I've two nested lists which are representing a table or matrix.
>
>A = [1, 2, 3]
>B = [4, 5, 6]
>C = [7, 8, 9]
>
>t = [A, B, C]
>
>print t[0][2] # Prints 3
>
>Now I found to search for certain values in a certain column.
>For example: column 1, search for 5, return 1, because 5 is found in the
>first column of the second element of t
>
>I hope I could explain what I want. Is there any way to do that except:
>
>for i in len(t):
>  if t[i][1] == "phrase":
>    found = i
>    break

Well, for a structurally similar approach to yours, first let's get
rid of len. Python is not [C, Pascal, Basic, Java, whatever], lists
can and should be iterated on directly. And let's make a function of
it that returns the list(s) (in case you have more than one list
fitting your search criteria) containing the searched for value.

>>> t = [[1,2,3],[4,5,6],[7,8,9],[2,5,8]]
>>>
>>> def search_nested_list(nested_list, column, value_to_search_for):
...     result = []
...     for lst in nested_list:
...             if lst[column] == value_to_search_for:
...                     result.append(lst)
...     return result
...
>>> x = search_nested_list(t, 1, 5)
>>> x
[[4, 5, 6], [2, 5, 8]]

If you only want to know whether any of the lists contains the value
you look for, without caring which ones, you can instead do it like
this:

>>> def search_nested_list(nested_list, column, value_to_search_for):
...     for lst in nested_list:
...             if lst[column] == value_to_search_for:
...                     return True  # or 1 for Python < 2.3
...
>>> x = search_in_nested_list(t, 1, 5)
>>> x
True

Grok it, and then get rid of the unnecessary long names ;-)
Or you could of course also do it with a list comprehension:
Either:
>>> [lst for lst in t if lst[1] == 5]
[[4, 5, 6], [2, 5, 8]]

Or:
>>> [True for x in t if x[1] == 5]
[True, True]

where the length of the result also tells you how often the result was
found.

Getting the last example to only return True once for multiple hits
and making functions of the list comprehensions is left as an exercise
to the reader...



--
Christopher


From fumanchu at amor.org  Wed Jan 21 02:53:09 2004
From: fumanchu at amor.org (Robert Brewer)
Date: Tue, 20 Jan 2004 23:53:09 -0800
Subject: PyTime Object and Application Crashing
Message-ID: <DE1CF2B4FEC4A342BF62B6B2B334601E561C45@opus.amorhq.net>

I wrote:
> Ryan Scott wrote:
> > When I run a query against an access database and the default 
> > date for 
> > my date/time field is 12/30/1899 the application crashes. 
> > Changing this 
> > to a different date like 03/03/2003 works.
> 
> AFAICT all dates on or before that date will crash. You have 
> several options:
> 
> 3. Access the date value as a float, not a PyTime:
> 
> # 12/30/1899, the zero-Date for ADO = 693594
> zeroHour = datetime.date(1899, 12, 30).toordinal()
> 
> if value is None:
>     return None
> else:
>     aDate, aTime = divmod(float(value), 1)
>     aDate = datetime.date.fromordinal(int(aDate) + zeroHour)
>     hour, min = divmod(86400 * aTime, 3600)
>     min, sec = divmod(min, 60)
>     aTime = datetime.time(int(hour), int(min), int(sec))
>     return datetime.datetime.combine(aDate, aTime)

Forgot to add, you can then set Date values using floats, as well:

    def datetime_out(self, inValue):
        return self.date_out(inValue) + self.time_out(inValue)
    
    def date_out(self, inValue):
        return inValue.toordinal() - zeroHour
    
    def time_out(self, inValue):
        return float(inValue.second + (inValue.minute * 60) +
                     (inValue.hour * 3600)) / 86400


FuManChu



From miki.tebeka at zoran.com  Mon Jan 19 02:13:05 2004
From: miki.tebeka at zoran.com (Miki Tebeka)
Date: 18 Jan 2004 23:13:05 -0800
Subject: parse binary file in python?
References: <Pine.LNX.4.58.0401182201180.1249@leopard.stud.ntnu.no>
Message-ID: <4f0a9fdb.0401182313.4c95718c@posting.google.com>

Hello Andreas,

> I want to parse a binary file in python. Does
> python have some built in methods for doing this easily?
Apart from struct and array module already suggested if you want
specific structures I recommend reading them in C and exposing the
interface using swig.

This way you can access structure members by name and not by offset.

HTH.
Miki


From usenet_spam at janc.invalid  Wed Jan 14 21:03:35 2004
From: usenet_spam at janc.invalid (JanC)
Date: Thu, 15 Jan 2004 02:03:35 GMT
Subject: C++ bad-mouthing (was: Why learn Python ??)
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<87brp7agl7.fsf@pobox.com> <7xvfnfmzy8.fsf@ruckus.brouhaha.com>
	<878yka2sze.fsf@pobox.com> <100bbekd61fbl53@corp.supernews.com>
Message-ID: <Xns94711F202CED8JanC@213.119.4.35>

claird at lairds.com (Cameron Laird) schreef:

>>Not sure what the goals were, but I'm not sure they were to compete
>>with Netscape and IE.  CNRI funding -- "R" for research -- seems to

> Certainly not the *original* goal, because Grail antedated those
> latecomers. 

My copy of Netscape 0.94beta for Windows has a file date of 1994-11-22.

And from the Grail docs:
"Grail was started in August 1995 as a quick and dirty demo. It quickly 
became a serious project, as witnessed by the release of version 0.2 in 
November 1995, and again by the planned release of version 0.3 (currently 
in beta) in June 1996."

-- 
JanC

"Be strict when sending and tolerant when receiving."
RFC 1958 - Architectural Principles of the Internet - section 3.9


From ep at epoz.org  Mon Jan 19 17:41:01 2004
From: ep at epoz.org (Etienne Posthumus)
Date: Mon, 19 Jan 2004 23:41:01 +0100
Subject: Munkware 0.3
In-Reply-To: <20040119225147.GA3160@cerberus>
References: <mailman.498.1074509063.12720.python-list@python.org>
	<400beeb1$1_1@nova.entelchile.net> <20040119225147.GA3160@cerberus>
Message-ID: <8EF44562-4AD0-11D8-95EE-0003935458F6@epoz.org>


On Jan 19, 2004, at 11:51 PM, Jeremy Jones wrote:
> - I've been hankering for an opportunity to begin work on a RESTish 
> framework
>   and this is as good of a chance as any.  If I am pleased with how it 
> turns
> out, I may distill the REST features out and create a second open 
> source project
> for it alone.

If you like toying with REST ideas, have a peek at the Quixote 
framework [1]. For me it has been the shortest route to going from REST 
ideas to implementation in Python. But of course you might want to do 
your own framework for fun/learning.

Etienne Posthumus
Amsterdam, Nederland

[1] http://www.mems-exchange.org/software/quixote/




From LittleDanEhren at yahoo.com  Thu Jan 29 17:07:25 2004
From: LittleDanEhren at yahoo.com (Daniel Ehrenberg)
Date: 29 Jan 2004 14:07:25 -0800
Subject: Printing/updating output to the screen
References: <40192945$1@nntphost.cis.strath.ac.uk>
Message-ID: <711c7390.0401291407.5195a5aa@posting.google.com>

Daniel Pryde <dpryde+usenet at cis.strath.ac.uk> wrote in message news:<40192945$1 at nntphost.cis.strath.ac.uk>...
> Hi there. I hope this isn't a stupid question to ask, but does anyone 
> know how to print out a string without moving to a new line each time 
> and simply updating the first line. An example would be, if I wanted to 
> have a percentage progress counter that was constantly updating. I'm 
> unsure how to do this without printing to a brand new line. Any help 
> would be greatly appreciated. Thanks.
> 
> Daniel

Put a comma after it. For example:

print "hi",

This, however, also prints a space. If that's not what you want, do the following:

from sys import stdout
stdout.write("hi")

That won't append a space or a newline.


Another Daniel


From sera at fhwang.net  Wed Jan 21 15:31:19 2004
From: sera at fhwang.net (Francis Hwang)
Date: 21 Jan 2004 12:31:19 -0800
Subject: New to Python: my impression v. Perl/Ruby
References: <mailman.493.1074484056.12720.python-list@python.org>
	<bui91p01uu6@enews2.newsguy.com> <du71xpue3rm.fsf@mozart.cc.tut.fi>
Message-ID: <7b561b93.0401211231.5ed33bda@posting.google.com>

Ville Vainio <ville.spamstermeister.vainio at thisisspamprotectiontut.finland> wrote in message news:<du71xpue3rm.fsf at mozart.cc.tut.fi>...

>     Phil> 10.times do something end
> 
>     Phil> is somehow so clear.  It's almost zenlike.
> 
> It's cute and fun to write, but less cute for people who have to read
> lots of such code in short time. I have a soft spot for such style
> also; I kinda like Python's "\n".join(["foo","bar"]), even if most
> seem to consider it a wart for readability reasons.

A lot of this has to do with how you conceptualize objects. In some
languages objects are big and heavyweight. So the few things that get
to be called Objects are blessed with special powers, and the lowly
primitive values are supposed to look up to them with admiration and
reverence.

In other languages everything can be an object, which means that you
have to think of the "object" idea differently. In Ruby integers are
objects, but there's a lot of syntactic sugar to make that happen.
After all,

  10.times do something end

is basically just fancy talk for

  for (i = 0; i < 10; i++ ) { something }

or whatever you think should be more explicit. This method might break
your conceptual model of what an object is, depending on which model
you like.

Personally, I love the Fixnum#times method, since it means I never
make fence-post errors anymore. More time for interesting problems,
less time spent on tediously stepping through code one iteration at a
time. And if my conceptual model is getting in the way of my ability
to write error-free code, then it's the conceptual model that has to
change.

Besides, once a language is Turing-complete, everything else is
syntactic sugar. So you might as well get the best syntactic sugar you
can get ...

Francis


From godoy at ieee.org  Thu Jan 15 08:17:45 2004
From: godoy at ieee.org (Jorge Godoy)
Date: Thu, 15 Jan 2004 11:17:45 -0200
Subject: wxwindows question
References: <mailman.320.1074000727.12720.python-list@python.org>
	<pan.2004.01.13.23.55.15.95014@phreaker.net>
Message-ID: <pggid1-jb4.ln1@wintermute.g2ctech>

On Tuesday 13 January 2004 21:55 Nuff Said wrote in
<pan.2004.01.13.23.55.15.95014 at phreaker.net>:

> wxpython is fine (actually: *very fine* :-) for Windows
> applications, but I would not use it for cross-platform
> development, because it is not stable enough on Linux.
> 
> (Even some of the widgets in the wxpython demo crash on Linux;
> and if you use wxpython with Unicode support, the situation gets
> even worse. This might change in the near future, but right now,
> wxpython is not stable enough on Linux IMHO.)

Which ones? And in which version of wxPython + wxGTK + Python? 


I develop on Linux and run software on Linux and Windows. I don't have
crashes on any of those systems. 

Those applications are used a lot to get reports from production of
hundreds of employees in one company (input data, request reports and
graphics, etc.) --- this one runs Windows --- and to track trucks
with cutted trees in another company (also input of data, position of
trucks, driver's name, vehicle license, government authorizations,
etc.) --- this one runs Linux. 


Each case is a case. Works for me. 


Be seeing you,
-- 
Godoy.     <godoy at ieee.org>


From lbates at swamisoft.com  Fri Jan 23 10:34:51 2004
From: lbates at swamisoft.com (Larry Bates)
Date: Fri, 23 Jan 2004 09:34:51 -0600
Subject: file open problem
References: <mailman.692.1074868692.12720.python-list@python.org>
Message-ID: <5bmdnRKHZpKHoozdRVn-sQ@comcast.com>

It is just a guess but pytest.txt doesn't appear
to exist in c:\temp directory on the laptop.
Double check for the existence of this file.

-Larry


"Neil MacGaffey" <neilmacgaffey at yahoo.com> wrote in message
news:mailman.692.1074868692.12720.python-list at python.org...
> Hi  - I'm new to python and am stymied by something
> that should be simple.  The file open command below
> works fine on my desktop machine, but I cant get it to
> work on my laptop.  Since using Python on my laptop is
> realistically the only way I'm going to find the time
> to learn Python, this is a big problem for me.  Here's
> what I'm up against:
>
>  PythonWin 2.3.3 (#51, Dec 18 2003, 20:22:39) [MSC
> v.1200 32 bit (Intel)] on win32.
> Portions Copyright 1994-2001 Mark Hammond
> (mhammond at skippinet.com.au) - see
> 'Help/About PythonWin' for further copyright
> information.
> >>> fobj = open(r'c:\temp\pytest.txt','r')
> Traceback (most recent call last):
>   File "<interactive input>", line 1, in ?
> IOError: [Errno 2] No such file or directory:
> 'c:\\temp\\pytest.txt'
>
> The laptop is a Sony VIAO that's about 2 years old.
> Its running Windows 2000, SP4.  The desktop is an
> older machine, but with the same Windows environment.
> I've obtained a fresh download of Python 2.3.3 and the
> Win32 extension and have re-installed both a couple of
> times with no apparent problems.  I also tried
> dropping back to Python 2.3.2, but had same result.
> Any ideas as to what I should be looking at on this
> laptop that might be causing the problem?
>
> Thank you
> Neil
>
> __________________________________
> Do you Yahoo!?
> Yahoo! SiteBuilder - Free web site building tool. Try it!
> http://webhosting.yahoo.com/ps/sb/
>




From kramb64 at hotmail.com  Thu Jan 22 04:55:25 2004
From: kramb64 at hotmail.com (Kramb)
Date: Thu, 22 Jan 2004 10:55:25 +0100
Subject: shelve slow in python 2.3.3 for windows
References: <u1qt00t4nbubknpq2lmeovdk36gu9ekt3r@4ax.com>
	<mailman.614.1074721650.12720.python-list@python.org>
	<322u00ppo44l8g003dgtcu8lna432to411@4ax.com>
	<mailman.623.1074731847.12720.python-list@python.org>
Message-ID: <456v00hma5e5afsmujntins8basrfgotg3@4ax.com>

On Wed, 21 Jan 2004 18:37:17 -0600, Skip Montanaro <skip at pobox.com>
wrote:

>'dbhash' and 'bsddb185' are really the same beast.
>
>    Marco> Now the question is: is it possible to use bsddb185 with python
>    Marco> 2.3.3?
>
>You're barking up the wrong tree.  That's not the problem.

So you're telling me that dbhash (namely /python2.3/DLLs/_bsddp.pyd)
on python 2.3.3 for Windows has a problem?


From kbk at shore.net  Sat Jan 31 19:09:52 2004
From: kbk at shore.net (Kurt B. Kaiser)
Date: 31 Jan 2004 16:09:52 -0800
Subject: quick question about IDLE
References: <cg0Rb.268478$JQ1.143697@pd7tw1no>
Message-ID: <76f21d50.0401311609.5cc86b54@posting.google.com>

"Elaine Jackson" <elainejackson7355 at home.com> wrote in message news:<cg0Rb.268478$JQ1.143697 at pd7tw1no>...
> I've noticed that the menu in IDLE sometimes has an item called "Shell" with a
> submenu that offers the opportunity to "Restart Shell". But at other times
> "Shell" isn't there. Can anybody clue me in about this? TIA.

The Shell window has this, and the Edit windows don't.

-- 
KBK


From tjreedy at udel.edu  Wed Jan 28 15:10:39 2004
From: tjreedy at udel.edu (Terry Reedy)
Date: Wed, 28 Jan 2004 15:10:39 -0500
Subject: Nested lists or conditional logic?
References: <ead93a6.0401280956.41fd4193@posting.google.com>
Message-ID: <bv94vg$50k$1@sea.gmane.org>


"mike beck" <cmichaelbeck at hotmail.com> wrote in message
news:ead93a6.0401280956.41fd4193 at posting.google.com...
> this is not all complex, but as a noob i'm having a hard time getting
> my head around it.
>
> i have a list of items. i need to print the items in batches of x,
> with a summary line after each complete or partial batch, and a total
> line at the end of the job.

> i've done the following, which works, but it seems like there must be
> a better/simpler/faster way to do this with nested loops. ideas?

The awkwardness is inherent in having non-0 remainders.  An explicit
counter strikes me as both simple and fast.  Maybe because what you did is
exactly the way I have done similar things.  But I would probably make
print_summary a function to avoid duplicating code in two places.

Terry J. Reedy






From timj at 914fan.net  Sat Jan 31 17:22:39 2004
From: timj at 914fan.net (Tim Jones)
Date: 31 Jan 2004 14:22:39 -0800
Subject: Pack parent control in child using control.pack(in_= syntax?
Message-ID: <f07faed4.0401311422.6caf54de@posting.google.com>

I've a parent class the generates a menu as in:

self.tm.menu = Menubutton(self.main, relief=RAISED, width=20,
                        bd=0, bg='#ECECEC')
    ...

I can then pack this menu (self.tm) into the current parent
window/frame and it appears as expected.

However, if I call another class - tool_panel(self) and then try to
post the tm menu into a frame (tf) using
    pack(in_=tf, side=RIGHT, anchor=NE) 
- the menu takes up space, but doesn't appear.  I can see this because
when I pack the icon logo without the menu, the logo is centered in
the new frame.  With the menu included, the icon logo is shifted left.

Thoughts or guidance will be greatly appreciated.

Tim

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

Here's my menu creation code in the parent class:

        self.tm = Menubutton(relief='raised', width=20,
                         bd=0, bg='#ECECEC')
        self.tm.menu = Menu(self.tm, tearoff=0, 
                         title='Tool Option')
        self.tm['menu'] = self.tm.menu

I set up the call to the tool_panel with a call:

        self.tool_panel = tool_panel(self)

Here's the actual tool_panel that I wish to pack into (imported from
another source file called panels.py with 'from panels import *'):

class tool_panel(panel):

    def __init__(self, parent):
        panel.__init__(self, parent)
        tf = Frame(self.main)
        self.parent.tm.pack(in_=tf, side=RIGHT)
        self.logo = PhotoImage(data=images.icon)
        Label(tf, image=self.logo).pack(side=TOP)
        tf.pack(side=BOTTOM, fill=BOTH, expand=1)
        return

    def display(self):
        self.display0()
        return

    pass


From james at logicalprogression.net  Wed Jan 28 09:39:33 2004
From: james at logicalprogression.net (James Henderson)
Date: Wed, 28 Jan 2004 14:39:33 +0000
Subject: r prefix bug ... or my lack of understanding?
In-Reply-To: <bv8gtj$5ob$1@ngspool-d02.news.aol.com>
References: <bv8gtj$5ob$1@ngspool-d02.news.aol.com>
Message-ID: <200401281439.33421.james@logicalprogression.net>

On Wednesday 28 January 2004 2:27 pm, Bill Sneddon wrote:
> Below is from python 2.3.3 on windows.
> I have tryed on Pythonwin and Idle and on
> a Solaris unix build 2.2.2.
>
> I know there are work arounds but the behavior
> seems a bit strange to me.
>
>  >>> path = r'c:\data'   #this is fine
>  >>> print path
>
> c:\data
>
>  >>> path = r'c:\data\'
>
> Traceback (  File "<interactive input>", line 1
>      path = r'c:\data\'
>                       ^
> SyntaxError: EOL while scanning single-quoted string

Your second backslash is escaping the closing quotation mark.

>  >>> path = r'c:\data\\'
>  >>> print path
>
> c:\data\\

Try this (with no "r":

>>> print 'c:\\data\\'
c:\data\

James
-- 
James Henderson, Logical Progression Ltd.
http://www.logicalprogression.net/
http://sourceforge.net/projects/mailmanager/




From grahamd at dscpl.com.au  Sat Jan 10 17:34:27 2004
From: grahamd at dscpl.com.au (Graham Dumpleton)
Date: 10 Jan 2004 14:34:27 -0800
Subject: xml-rpc
References: <vvub6otnlfdi56@corp.supernews.com>
	<mailman.271.1073760516.12720.python-list@python.org>
Message-ID: <dc6f5c99.0401101434.78b09c7a@posting.google.com>

Skip Montanaro <skip at pobox.com> wrote in message news:<mailman.271.1073760516.12720.python-list at python.org>...
> Walt> Curious about why the same very simple xml-rpc demo code should
>     Walt> execute quickly under python2.1 but very slowly under python2.3
> 
>     Walt> python2.1  ~4 seconds
>     Walt> python2.3  ~24 seconds on the same machine
> 
>     Walt> Is there a well known reason for the difference?
> 
> Nope.  I tweaked your script to contact my XML-RPC server over the net
> (about 20-30ms ping times between client and server) and just make
> server.echo() calls.  It took between 1.6 and 2.5 seconds real time running
> python 2.4a0 (aka CVS) on the client and 2.2.3 on the server.  Note that the
> server is in production, so the different times were probably due to
> transient server load.

Any difference in speed between different versions of Python can sometimes
be accounted for by there not being sgmlop or expat modules installed with
the slower version of Python. But then, if the data set going back and forth
is small, this shouldn't really be the case.

Still worthwhile to keep in mind later on if the amount of data does increase.


From phleum_nospam at chello.se  Sat Jan  3 10:35:33 2004
From: phleum_nospam at chello.se (Carl)
Date: Sat, 03 Jan 2004 16:35:33 +0100
Subject: Python as a numerical prototyping language.
References: <jZJDb.3529$7U1.27181@amstwist00>
	<67n0966wsz.fsf@aster.homelinux.net>
Message-ID: <vaBJb.6009$7U1.65596@amstwist00>

Johannes.Nix at web.de wrote:

> In my eyes, what Python, and Open Source in general, is still lacking
> is an very easy, fast and very high-quality library for scientific and
> financial plotting, although there are lots of good and thougthful
> beginnings like Gnuplot, OpenDX, and many more. This would be an
> essential building block to foster the use of Python in science.

I agree! I use Gnuplot, it works OK, but is not perfect. I am also not that
enthusiastic about the algebra syntax of the Numerics module. I wish it was
closer to the Matlab syntax, which is much easier to grasp. 

Python + Numeric + pygsl + FFTW + ... is, according to my view, a very good
alternative to using Matlab, Scilab, or R. What is missing is a large, rich
scientific library, and a better syntax for manipulating matrices and
vectors. On the other hand, what Python has got is an enormous amount of
modules for doing almost anything. For instance, there are Python libraries
for reading and writing to databases and building interfaces (very
important for building industry strength applications). So, if only Python
had a very large, rich, and fast library for numerical calculations and
scientific plotting I would be as happy as one can be.

I have used Matlab, Scilab, and R for quite some time. The last year,
however, I have started to use Python more and more. I wonder why? My guess
is that Python already is a viable environment for doing explorative data
analyses and testing numerical algorithms.

When it comes to speed, I feel that Python + Numeric is up to the task. For
example, I have been playing around with Monte Carlo simulation using list,
dictionaries, an numerical vectors and matrices as much as possible, and
have experienced performance very close to comparable code in C.

Carl 

 


From aahz at pythoncraft.com  Sun Jan 25 10:14:10 2004
From: aahz at pythoncraft.com (Aahz)
Date: 25 Jan 2004 10:14:10 -0500
Subject: [OPINION] - does language really matter if they all
 do        the        samething?
References: <69A0D4AB81C51447AD6BA387782B8D64093D8A@midl-mail4.etcconnect.com>
	<58587302-4E30-11D8-8FAB-0003934ACDEC@zdome.net>
	<4012FEB1.5000106@prescod.net>
	<mailman.758.1075023273.12720.python-list@python.org>
Message-ID: <bv0mg2$fai$1@panix1.panix.com>

In article <mailman.758.1075023273.12720.python-list at python.org>,
Dietrich Epp  <dietrich at zdome.net> wrote:
>On Jan 24, 2004, at 3:24 PM, Paul Prescod wrote:
>>
>> function random_sword_magic_power(quality):
>>     return choose_random_assoc(
>>         selector = (quality, (poor, medium, good)),
>>         properties = {        (5, 0, 0): glows_in_the_dark(),
>>                               (3, 3, 0): magically_silent(),
>>                         (1, 5, 1): elemental_power(
>>                           choice([earth, water, air, fire])
>>                         (0, 2, 4): magical_keen_edge(),
>>                         (0, 0, 2): ????}
>>
>> I don't follow what you are doing with the last line so I didn't 
>> duplicate it.
>
>The last line recursively calls random_sword_magic_power() twice and 
>concatenates the results.  It's something that I used a lot in this 
>program, which I originally wrote in Python, but I was completely 
>baffled trying to implement this part.  The reason you can't do it with 
>a dict or list in Python is that the list is always evaluated, and 
>recurses infinitely.  A dict isn't appropriate because there would be 
>duplicate keys.  Think of it as three tables collapsed into one, the 
>'poor', 'medium', and 'good' tables, where the relative probabilities 
>for each table fall on a different column.

Well, choose_random_assoc() needs to dispatch on functions rather than
values.  That will recurse only one level, and only in
choose_random_assoc().  You'll also need to identify tuples in order to
pass in values.  Here's a rewrite of Paul's function that shows roughly
what you need to do:

function random_sword_magic_power(quality):
    return choose_random_assoc(
        selector = (quality, (poor, medium, good)),
        properties = {
            (5, 0, 0): glows_in_the_dark,
            (3, 3, 0): magically_silent,
            (1, 5, 1): (elemental_power, choice([earth, water, air, fire]),
            (0, 2, 4): magical_keen_edge,
            (0, 0, 2): ((random_sword_magic_power, medium),
                (random_sword_magic_power, medium)),
            }

Quite frankly, though, for this kind of application, I probably would
choose to write a domain-specific language (more precisely, a "smart"
config file format).  That would make it easier for someone who wasn't a
programmer to add functionality.  As I said earlier, I don't think the
fact that Lisp makes it easy to directly express this idiom makes up for
its other faults.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

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


From garabik-news-2002-02 at kassiopeia.juls.savba.sk  Fri Jan 16 05:52:06 2004
From: garabik-news-2002-02 at kassiopeia.juls.savba.sk (Radovan Garabik)
Date: 16 Jan 2004 10:52:06 GMT
Subject: ANNOUNE: pyeve-0.1
Message-ID: <mailman.1074260223.20703.clpa-moderators@python.org>

pyeve is a simple quickhack-ish utility in python reacting 
to special keys (found mostly on notebooks). Primary goal
was to enable soundcard volume control via those special Fn-keys,
working not only in X11, but also on text console.

It works with linux kernel 2.6.* with evdev input interface,
equally well on console as in X11.

URL:
    http://kassiopeia.juls.savba.sk/~garabik/software/pyeve/

Licence:
    GPL

-- 
 -----------------------------------------------------------
| Radovan Garab?k http://melkor.dnp.fmph.uniba.sk/~garabik/ |
| __..--^^^--..__    garabik @ kassiopeia.juls.savba.sk     |
 -----------------------------------------------------------
Antivirus alert: file .signature infected by signature virus.
Hi! I'm a signature virus! Copy me into your signature file to help me spread!



From __peter__ at web.de  Fri Jan 16 04:59:54 2004
From: __peter__ at web.de (Peter Otten)
Date: Fri, 16 Jan 2004 10:59:54 +0100
Subject: Redefining __call__ in an instance
References: <73b00f0c.0401151529.676347b6@posting.google.com>
Message-ID: <bu8cg9$t7h$05$1@news.t-online.com>

Robert Ferrell wrote:

> I have a question about assigning __call__ to an instance to make that
> instance callable.  I know there has been quite a bit of discussion
> about this, and I've read all I can find, but I'm still confused.
> 
> I'd like to have a factory class that takes a string argument and returns
> the appropriate factory method based on that string.  I'd like the
> instances to be callable.  Like this:
> 
> fact = Factory('SomeThing')
> aSomeThing = fact(some args)
> 
> anotherFact = Factory('SomeThingElse')
> anotherThing = anotherFact(some other args)

I think fact and anotherFact could be methods instead of classes, e. g.

fact = Factory("SomeThing").someMethod # see complete example below

# Here's something that should meet your specs:

class Factory:
    def __init__(self, times=1, *args):
        self.times=times
    def something(self, a1="alpha",*args):
        print "something"
        return a1*self.times
    def somethingElse(self, a1="beta", *args):
        print "something else"
        return a1*self.times

def factory(what, *initargs):
    """ factory with one instance per call """
    return getattr(Factory(*initargs), what)

f1 = factory("something")
f2 = factory("somethingElse", 2)

for f in (f1, f2):
    print "%s() --> %s" % (f.__name__, f())

> The way I thought to do this was to assign the __call__ attribute of
> the fact instance to the appropriate factory method in __init__.  That
> does not
> work, as many others have pointed out.  I know there are workarounds.
> The appended code shows the variants I know of.  I can use one of
> them, but they are not quite what I am looking for.
> 
> Have I missed the key message that explains how to make new-style
> classes callable, with the called method unique to each instance?

Why not be generous and make a dedicated (sub)class for each kind of call?
Every instance of a subclass of Callable is just a stateful function.

# Here's what I would prefer:
class Callable:
    def __init__(self, times=1, *args):
        self.times=times

class MoreCallable(Callable):
    def __call__(self, a1="gamma",*args):
        print "more"
        return a1*self.times

class OrLessCallable(Callable):
    def __call__(self, a1="delta",*args):
        print "or less"
        return a1*self.times

# a bare bones registry
_callables = {
    "more": MoreCallable,
    "less": OrLessCallable
}

def factory(what, *initargs):
    # a variant that uses Callable instances
    # instead of classes could easily be devised
    return _callables[what](*initargs)

for f in (factory("more"), factory("less", 3)):
    print "%s() --> %s" % (f.__class__.__name__, f())

Both variants respect default arguments.

Peter



From jjl at pobox.com  Fri Jan  9 09:28:35 2004
From: jjl at pobox.com (John J Lee)
Date: Fri, 9 Jan 2004 14:28:35 +0000 (GMT)
Subject: win32: internet explorer automation problem
In-Reply-To: <HEEHKDGJBOEOEAFOJMDBCENBCEAA.michal.zylinski@atm.com.pl>
References: <HEEHKDGJBOEOEAFOJMDBCENBCEAA.michal.zylinski@atm.com.pl>
Message-ID: <Pine.LNX.4.58.0401091425470.742@alice>

On Fri, 9 Jan 2004, [iso-8859-2] Micha? ?yli?ski wrote:

> > > It just 'watches' the MSIE behaviour and
> > > simulates the user work.
> >
> > And...?
[...]
> document.window[window_index or whatever]... It seems like javascript
> extends the IHTMLDocument object model.

Well, it's got to be in there somewhere (not necessarily IHTMLDocument --
there are a bunch of interfaces whose names I don't remember).


John



From eric.brunel at N0SP4M.com  Mon Jan 19 04:10:18 2004
From: eric.brunel at N0SP4M.com (Eric Brunel)
Date: Mon, 19 Jan 2004 10:10:18 +0100
Subject: What's the best Python freeze tool?
References: <bu969m$jqu$1@news3.bu.edu>
Message-ID: <bug6e9$q9c$1@news-reader5.wanadoo.fr>

Nick wrote:
> I've tried a couple of Python freeze tool. But encountered some bugs. 
> Anyone know what's the most mature Python Freeze tool? Thanks.

I'm working with McMillan Installer and didn't see any major bug. Note however 
I'm still using Python 2.1 and Installer 5b5_5. There is apparently a new 
Installer version (6 something - not yet "official"), but I don't know if it 
correctly supports Python 2.3 now; I'm quite interested in hearing other users' 
experiences, BTW...
-- 
- Eric Brunel <eric dot brunel at pragmadev dot com> -
PragmaDev : Real Time Software Development Tools - http://www.pragmadev.com



From arjen.dijkstraNoSpam at hccnet.nl  Wed Jan 14 11:24:53 2004
From: arjen.dijkstraNoSpam at hccnet.nl (duikboot)
Date: Wed, 14 Jan 2004 17:24:53 +0100
Subject: Oracle to Mysql (dates) Help please
References: <btrj8h$oiq$1@news3.tilbu1.nb.home.nl>
	<4003b6e7$0$142$e4fe514c@dreader4.news.xs4all.nl>
	<p7mdd1-g74.ln1@beastie.ix.netcom.com>
	<40051543$0$137$e4fe514c@dreader11.news.xs4all.nl>
	<b43gd1-d9b.ln1@beastie.ix.netcom.com>
Message-ID: <40056d5f$0$15165$e4fe514c@dreader14.news.xs4all.nl>

Thank you all very much for your help.

I'll think it will work now (don't know yet, I'll work on it later this
week)


Cheers Arjen
(If you're interested, I will post the solution that worked for me)




From ville.spamstermeister.vainio at thisisspamprotectiontut.finland  Thu Jan 22 05:40:30 2004
From: ville.spamstermeister.vainio at thisisspamprotectiontut.finland (Ville Vainio)
Date: 22 Jan 2004 12:40:30 +0200
Subject: Nokia prefers Python
References: <mKTIlIA10uDAFwGM@jessikat.fsnet.co.uk>
	<%pLPb.214668$X%5.181901@pd7tw2no>
Message-ID: <du7llo0mfkx.fsf@mozart.cc.tut.fi>

>>>>> "Parzival" == Parzival  <ConfuseYourSpamBot-parzp at ConfuseYourSpamBot.shaw.ca> writes:

    Parzival> With 1.3 million developers, Nokia should REALLY raise
    Parzival> the Python profile.  Guido may have to move again.

I dream of the time when Appendix C of a Cell phone manual contains an
abridged Python tutorial :-).

In the meantime, Python will be a great tool for us who work on
Symbian OS - especially if wrapping of Symbian OS apis via
swig/equivalent works out alright. We could prototype the cell phone
apps in Python and later on port them to C++... Not to mention how
much that would improve unit testing.

*drool*

-- 
Ville Vainio   http://tinyurl.com/2prnb


From mwh at python.net  Fri Jan 23 06:19:20 2004
From: mwh at python.net (Michael Hudson)
Date: Fri, 23 Jan 2004 11:19:20 GMT
Subject: Simple way of turning -DNDEBUG off in distutils
References: <5eb8fb88.0401221141.35549e53@posting.google.com>
Message-ID: <m3y8ry52vc.fsf@pc150.maths.bris.ac.uk>

rick_muller at yahoo.com (Rick Muller) writes:

> Is there a simple way of toggling the -DNDEBUG flag in the distutils
> builds? I just realized that all of my assert statements were being
> skipped because by default the distutils put in -DNDEBUG.

Well, one way is to build against a debug build of Python.  There
might be some other way, but I don't know it...

Cheers,
mwh

-- 
  The PROPER way to handle HTML postings is to cancel the article,
  then hire a hitman to kill the poster, his wife and kids, and fuck
  his dog and smash his computer into little bits. Anything more is
  just extremism.                                 -- Paul Tomblin, asr


From philh at invalid.email.address  Sat Jan  3 04:52:59 2004
From: philh at invalid.email.address (phil hunt)
Date: Sat, 3 Jan 2004 09:52:59 +0000
Subject: Text-to-HTML processing program
References: <slrnbvcm32.122.philh@cabalamat.cabalamat.org>
	<7xwu89pnan.fsf@ruckus.brouhaha.com>
Message-ID: <slrnbvd47r.22s.philh@cabalamat.cabalamat.org>

On 02 Jan 2004 22:18:56 -0800, Paul Rubin <http://phr.cx at NOSPAM.invalid> wrote:
>philh at invalid.email.address (phil hunt) writes:
>> Does anyone know of a text-to-HTML processing program, ideally
>> written in Python because I'll probably be wanting to make small
>> modifications to it, which is simple and straightforward to use
>> and which uses a simple markup language (something like Wikipedia
>> markup would be ideal)?
>
>I really wish Wikipedia, BBCodes, and all that would just use regular
>HTML instead of continually inventing new "simplified" markup codes
>for users to remember.  The one thing they do that's useful is convert
>blank lines to <p>.

Wikipedia markup is significantly easier to use than HTML. Compare:

This is a ''list'':
* A list
* [http://www.cabalamat.org/ my website]
* [http://slashdot.org/ Slashdot]

With:

<p>This is a <i>list</i>: 
<ul>
<li><a href='http://www.cabalamat.org/'>my website</a></li>
<li><a href='http://slashdot.org/'>Slashdot</a></li>
</ul>

-- 
"It's easier to find people online who openly support the KKK than 
people who openly support the RIAA" -- comment on Wikipedia
(Email: <zen20000 at zen.co.ku>, but first subtract 275 and reverse 
the last two letters).  




From swalters_usenet at yahoo.com  Mon Jan 12 15:19:59 2004
From: swalters_usenet at yahoo.com (Samuel Walters)
Date: Mon, 12 Jan 2004 20:19:59 GMT
Subject: Why learn Python ??
References: <40029dad$0$28706$a729d347@news.telepac.pt>
Message-ID: <pan.2004.01.12.20.18.36.606924@yahoo.com>

|Thus Spake Bicho Verde On the now historical date of Mon, 12 Jan 2004
13:05:19 +0000|

> I have now free time and money to do what I want :-)
Go to the Bahamas.  You'll enjoy it more.

[chop]

>       Anyone would help me and give me some hints?

Here's my two cents on which languages to learn, why and in what order.

Python:
Python is probably the best language from which to branch out to other
languages.  If you learn it well, you will have all the major concepts of
programming as part of your mental toolkit.  Luckily, Python's learning
curve is not at all steep, there's a great and wonderful community that
gladly answers questions and helps you through the confusing parts.  As a
bonus, you'll find that it's terribly, dastardly useful.

C:
In my opinion, this is where a student should move next.  At some point or
another, every serious programmer has to dig into some C code.  It's
important to learn C before C++ because many of the conveniences of C++
make one lazy about learning C.  Because of it's vast popularity, you can
often find resources that give algorithms and outlines of processes in C,
and those ideas can then be applied to your language of choice.  Be sure
to investigate linked lists, trees, hashing and memory allocation methods
and other such "not quite basic" constructs in C.  From those, you will
understand a lot more of what goes on behind the scenes in other
languages.

C++:
If you've learned C, It's good to move onto C++ if only for the sake of
completeness.  When I first learned C++, I was completely enamored of it,
but that crush has since died.  It's important in GUI based applications
and gives you a fair grounding in Object Oriented programming.  I strongly
recommend Bruce Eckel's "Thinking in C++" as a guide to the language
*after* you've gotten the basics down.  It is available for free online,
but I'm glad I bought the dead tree version of it.  There is some debate
as to how useful C++ is, but I think it's at least useful enough to take
some time learning well.

Lisp/Scheme:
Lisp and Scheme are two languages that people claim will give you
Jedi-like powers as a programmer.  I'm learning them right now, so I can't
give you advice on why one would learn them.  I'm learning Scheme first,
because there seem to be many more introductory tutorials and a lot of
advice that one should learn Scheme, then move to Common Lisp.  YMMV.  If
you like AI, at some point you will run across Lisp code, so it should be
of particular interest to you.  In short, the consensus is that Lisp, like
milk, does a body good.

It is my philosophy that one should at least learn enough of a lot of
languages that you can at least browse some code without feeling lost. 
Each new language gives you some new ideas that make you better at other
languages.

What follows is the minimum I would suggest you familiarize yourself with.

Sed/Awk/Bash shell Scripting:
Sed, Awk and bash shell scripting get tossed around enough that you should
be able to read them.  Sed and Awk are confusing at first, and take some
measure of work to develop even a minimum competency in.  Don't give up
easily here.  It pays off in the long run.

Perl:
I don't like perl, but you shouldn't judge a language on my opinion of it.
 Perl is very popular and is worthy understanding the basics of.  Even if
you don't like it, learn enough of it to read programs written in it.  It
is a very important language.  Perl is easier to learn once you have
mastered Sed and Awk. (and vice versa) In many ways Perl is a souped up
combination of the two languages that's been imbued with mutant
super-powers.

Java:
Once you have learned C++, it's almost trivial to learn Java.  The hardest
part is keeping separate in your head what applies to C++ and what applies
to Java.  Besides, it's not a bad thing to be able to put on your resume.

C# and .Net:
I fear that C# is just another Microsoft misadventure, but for now it's
worth gaining a cursory knowledge of.  If nothing else, it's a buzzword
compliant way to build your resume.  Though, Microsoft can be a tricky
devil, so think carefully before you bank a career on something they
control.

PHP:
PHP has it's fair share of warts, but reading a couple of books on it
gives you a strong grounding in the issues a dynamic web-based application
faces.

Assembly:
Research carefully, and find a good book on assembly language programming.
Spend some time wrestling with it.  It's hard and confusing.  You may
never again touch a lick of assembly in your life, but you will always be
glad for the knowledge it gave you.  Assembly is more of a long term
project than any of the other languages I've mentioned, so go slow here.

And always remember:

Programming is not a spectator sport.

Close the book often and try to write code from memory.

HTH

Good Luck!

Sam Walters.

-- 
Never forget the halloween documents.
http://www.opensource.org/halloween/
""" Where will Microsoft try to drag you today?
    Do you really want to go there?"""



From ed_zeng at yahoo.com  Fri Jan 23 16:46:24 2004
From: ed_zeng at yahoo.com (ex laguna)
Date: 23 Jan 2004 13:46:24 -0800
Subject: py2exe with shelve error
Message-ID: <53ab57.0401231346.1696247f@posting.google.com>

I have run into this problem below with py2exe version 0.5.0 and
python 2.3.3. Does anyone know a solution or workaround for this? 
Thanks much!

## Begin of test.py
import shelve

f = shelve.open('test.txt')
f['hello'] = 'world'
f.close()
f = shelve.open('test.txt')
print f.keys()
print f.values()
f.close()
## End of test.py

## Begin of setup.py
from distutils.core import setup
import py2exe

setup(console=["test.py"])
## End of setup.py

c:\Python>python -V
Python 2.3.3

c:\Python>python test.py
['hello']
['world']

c:\Python>python setup.py py2exe
running py2exe
*** searching for required modules ***
*** parsing results ***
creating python loader for extension '_sre'
creating python loader for extension 'datetime'
*** finding dlls needed ***
*** create binaries ***
*** byte compile python files ***
skipping byte-compilation of C:\Program
Files\Python23\lib\__future__.py to __future__.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\copy_reg.py
to copy_reg.pyc
skipping byte-compilation of C:\Program
Files\Python23\lib\sre_compile.py to sre_compile.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\locale.py
to locale.pyc
byte-compiling c:\Python\build\bdist.win32\winexe\temp\_sre.py to
_sre.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\unittest.py
to unittest.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\macpath.py
to macpath.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\popen2.py
to popen2.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\stat.py to
stat.pyc
byte-compiling c:\Python\build\bdist.win32\winexe\temp\datetime.py to
datetime.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\atexit.py
to atexit.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\whichdb.py
to whichdb.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\cmd.py to
cmd.pyc
skipping byte-compilation of C:\Program
Files\Python23\lib\os2emxpath.py to os2emxpath.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\tempfile.py
to tempfile.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\pprint.py
to pprint.pyc
skipping byte-compilation of C:\Program
Files\Python23\lib\_strptime.py to _strptime.pyc
skipping byte-compilation of C:\Program
Files\Python23\lib\sre_constants.py to sre_constants.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\re.py to
re.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\ntpath.py
to ntpath.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\tokenize.py
to tokenize.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\getopt.py
to getopt.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\doctest.py
to doctest.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\random.py
to random.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\string.py
to string.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\warnings.py
to warnings.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\UserDict.py
to UserDict.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\inspect.py
to inspect.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\repr.py to
repr.pyc
skipping byte-compilation of C:\Program
Files\Python23\lib\traceback.py to traceback.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\copy.py to
copy.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\bdb.py to
bdb.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\types.py to
types.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\anydbm.py
to anydbm.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\sre.py to
sre.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\pickle.py
to pickle.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\StringIO.py
to StringIO.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\pdb.py to
pdb.pyc
skipping byte-compilation of C:\Program
Files\Python23\lib\linecache.py to linecache.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\token.py to
token.pyc
skipping byte-compilation of C:\Program
Files\Python23\lib\dummy_thread.py to dummy_thread.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\opcode.py
to opcode.pyc
skipping byte-compilation of C:\Program
Files\Python23\lib\posixpath.py to posixpath.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\calendar.py
to calendar.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\shelve.py
to shelve.pyc
skipping byte-compilation of C:\Program
Files\Python23\lib\sre_parse.py to sre_parse.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\os.py to
os.pyc
skipping byte-compilation of C:\Program Files\Python23\lib\dis.py to
dis.pyc
*** copy extensions ***
*** copy dlls ***
copying C:\Program Files\Python23\Lib\site-packages\py2exe\run.exe ->
c:\Python\dist\test.exe

c:\Python>cd dist

c:\Python\dist>test.exe
Traceback (most recent call last):
  File "test.py", line 3, in ?
  File "shelve.pyc", line 231, in open
  File "shelve.pyc", line 211, in __init__
  File "anydbm.pyc", line 62, in ?
ImportError: no dbm clone found; tried ['dbhash', 'gdbm', 'dbm',
'dumbdbm']
Exception exceptions.AttributeError: "DbfilenameShelf instance has no
attribute'writeback'" in  ignored

c:\Python\dist>


From skip at pobox.com  Tue Jan  6 11:21:45 2004
From: skip at pobox.com (Skip Montanaro)
Date: Tue, 6 Jan 2004 10:21:45 -0600
Subject: Speed?
In-Reply-To: <3FFABBA8.3A24716F@engcorp.com>
References: <mailman.41.1073113311.12720.python-list@python.org>
	<3FFABBA8.3A24716F@engcorp.com>
Message-ID: <16378.57497.208914.583823@montanaro.dyndns.org>


    [ on creating benchmarks ]

    Peter> And with Python, of course, it's almost trivial to do this kind
    Peter> of thing, compared to some other languages.  Sigh.

Which was just another data point in your decision, right?  After all, if
Python is so much easier to write your benchmarks in than some/most/all of
the alternatives, that has to factor into the choice of implementation
language.

Skip



From vmontressor at yahoo.com  Sun Jan 11 11:52:57 2004
From: vmontressor at yahoo.com (Vincent Montressor)
Date: 11 Jan 2004 08:52:57 -0800
Subject: Restoring my own PyGNOME panel applets under GNOME 1.4
Message-ID: <88fe7467.0401110852.5480a822@posting.google.com>

I'm playing around with writing my own panel applets, and I'm trying
to figure out how to get my panel applets to be restored when I log
in.  As an experiment, I'm using the simple clock applet that comes
with PyGNOME (clock-applet.py).  It works fine when I run it from the
shell, but when I log out and log in again, there's just a tiny
GNOME-foot icon where the applet should be.

After poking around in ~/.gnome/panel.d, I think I've figured out that
the panel knows there should be an applet in that spot, but there's
nothing telling it what executable to run to put the applet there.  Do
I somehow need to create that mapping, or is the problem something
else altogether?

Applets I add to the panel through the normal process (right-click ->
Applets -> ...) are restored when I log in, as expected.

I'm using GNOME 1.4 on Red Hat 7.3 (sorry, but this is a work system,
and I can't upgrade; I also can't put my code where the system applets
are).  Thanks for any help you can offer.


From claird at lairds.com  Mon Jan 12 20:06:49 2004
From: claird at lairds.com (Cameron Laird)
Date: Tue, 13 Jan 2004 01:06:49 -0000
Subject: C++ bad-mouthing (was: Why learn Python ??)
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<10064loqc7sd7e3@corp.supernews.com>
	<7xeku496wx.fsf@ruckus.brouhaha.com>
	<donn-9D2291.16343412012004@nntp6.u.washington.edu>
Message-ID: <1006h59mr5qu11e@corp.supernews.com>

In article <donn-9D2291.16343412012004 at nntp6.u.washington.edu>,
Donn Cave  <donn at u.washington.edu> wrote:
			.
			.
			.
>If so, that might be a good direction for yet another book about
>Python.
>
>   Donn Cave, donn at u.washington.edu

I sure think so; if only I were a man of leisure, writing *Programming
in the Large with Python* would be verrrrrry tempting.
-- 

Cameron Laird <claird at phaseit.net>
Business:  http://www.Phaseit.net


From richardshea at fastmail.fm  Mon Jan 12 22:07:02 2004
From: richardshea at fastmail.fm (Richard Shea)
Date: 12 Jan 2004 19:07:02 -0800
Subject: Accessing "GIS (ESRI shape file)" files from Python ?
Message-ID: <282f826a.0401121907.498543e6@posting.google.com>

Hi - As usual having Python is making me consider doing things I
wouldn't normally !

I've come across some files described as "GIS version (ESRI shape
file)" which consitute an electronic map of the Wellington, New
Zealand. There are six files in the package :

suburbs.shx
suburbs.prj
suburbs.sbn
suburbs.sbx
suburbs.shp
suburbs.shp.xml
suburbs.dbf

Can anyone tell me - is there, freely available, existing software
accessible from Python which would allow me to read these files ? One
thing I'm particularly interested to discover is if they contain
contour (altitude) information so ideally that's that the sort of
thing I would extract - but I'm just generally curious and wanting to
educate myself a little in this area.

In case it needs saying my knowledge of GIS is ... light ;-) but I'm
interested to discover a little more.


thanks

richard shea.


From opengeometry at yahoo.ca  Wed Jan 21 17:51:41 2004
From: opengeometry at yahoo.ca (William Park)
Date: 21 Jan 2004 22:51:41 GMT
Subject: Checking for duplicate instances of a script...
References: <400e4638$0$19274$626a54ce@news.free.fr>
Message-ID: <bumvpt$jtn97$2@ID-99293.news.uni-berlin.de>

Guillaume Dargaud <NOusenetSPAM at gdargaud.net> wrote:
> Hello, python beginner here,
> How can I make sure that a given script is never run more than once at the
> same time in a system ?
> Besides checking 'ps' for its own name. Most modern langages have a direct
> way to do that.

1. Check 'ps'.  But, if 2 processes checks at the same, then they see
nothing is running and decides to run themselves.

2. Use lockfile.  

-- 
William Park, Open Geometry Consulting, <opengeometry at yahoo.ca>
Linux solution for data management and processing. 


From gerrit at nl.linux.org  Tue Jan  6 14:31:22 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Tue, 6 Jan 2004 20:31:22 +0100
Subject: PRE-PEP: new Path class
In-Reply-To: <just-CC8B2B.17325205012004@news1.news.xs4all.nl>
References: <vvivefh35qjv9a@news.supernews.com>
	<just-CC8B2B.17325205012004@news1.news.xs4all.nl>
Message-ID: <20040106193122.GC4581@nl.linux.org>

Just wrote:
> In article <vvivefh35qjv9a at news.supernews.com>,
>  "John Roth" <newsgroups at jhrothjr.com> wrote:
> > 4) Should path expose an iterator for listdir(?)
> > 
> > I don't see why not, as long as the path is to a
> > directory.
> 
> _An_ iterator, sure, but not __iter__. How about path.listdir()? :)
> __iter__ could also iterate over the path elements, so it's ambiguous at 
> least.

I think it should be called .list(): this way, it is better extendable
to archive files like zip and tar. Indeed: I know at least 3 different
possibilities for path.__iter__. Because of "In the face of ambiguity,
refuse the temptation to guess.", I think there should be no __iter__
(which is even another reason not to subclass __str__, by the way) [0].

> > 15. Should files and directories be the same
> > class.
> > 
> > Probably not. While they share a lot of common
> > functionality (which should be spelled out as an
> > interface) they also have a lot of dissimilar
> > functionality. Separating them also makes it easy
> > to create objects for things like symbolic links.
> 
> But what about paths for not-yet-existing files of folders? I don't 
> think you should actually _hit_ the file system, if all your doing is 
> path.join().

Another problem is dat I may not know whether I have a file or a
directory. If a directory is a different type than a file, it would
probably have a different constructor as well, and I may end up doing:

p = path(foo)
if p.isdir():
    p = dirpath(foo)

If this is done implicitly, you can't create a path without
fs-interaction, which is bad for virtual-fs extensibility and confusing
if it doesn't mean a path always exists [1].

[0] http://people.nl.linux.org/~gerrit/creaties/path/pep-xxxx.html#for-foo-in-mypath 
[1] http://people.nl.linux.org/~gerrit/creaties/path/pep-xxxx.html#absent-paths

yours,
Gerrit.

-- 
257. If any one hire a field laborer, he shall pay him eight gur of
corn per year.
          -- 1780 BC, Hammurabi, Code of Law
-- 
Asperger's Syndrome - a personal approach:
	http://people.nl.linux.org/~gerrit/english/



From danb_83 at yahoo.com  Tue Jan  6 00:28:28 2004
From: danb_83 at yahoo.com (Dan Bishop)
Date: 5 Jan 2004 21:28:28 -0800
Subject: PRE-PEP: new Path class
References: <vvivefh35qjv9a@news.supernews.com>
Message-ID: <ad052e5c.0401052128.766415cb@posting.google.com>

"John Roth" <newsgroups at jhrothjr.com> wrote in message news:<vvivefh35qjv9a at news.supernews.com>...
> I'm adding a thread for comments on Gerrit Holl's pre-pep, which
> can be found here:
> 
> http://tinyurl.com/2578q
> 
... 
> 1) Should path be a subclass of str?
> 
> No.

So will the file constructor be "overloaded" to accept path objects? 
What about all those functions in the os module?


From cookedm+news at physics.mcmaster.ca  Tue Jan 13 09:49:36 2004
From: cookedm+news at physics.mcmaster.ca (David M. Cooke)
Date: Tue, 13 Jan 2004 09:49:36 -0500
Subject: building strings with variable input
References: <pduMb.6321$g4.137247@news2.nokia.com>
	<400273B8.E991F41D@alcyone.com>
	<qnkd69pp4ph.fsf@arbutus.physics.mcmaster.ca>
	<4002F93D.298A2394@alcyone.com>
	<qnk4qv0pnmz.fsf@arbutus.physics.mcmaster.ca>
	<40037BDE.CAFB05A9@alcyone.com>
Message-ID: <qnk65ff6gzj.fsf@arbutus.physics.mcmaster.ca>

At some point, Erik Max Francis <max at alcyone.com> wrote:

> "David M. Cooke" wrote:
>
>> Do you mean something like
>> os.environ['startTime'] = '`rm -rf /`'
>> ?
>
> No, I mean something like
>
> 	os.environ['startTime'] = '"; rm -rf /; : "'
>
> The lesson to be learned here is:  Do not build shell commands from
> untrusted inputs.  Ever.

Doesn't work:
>>> os.environ['string'] = '"; uname; : "'
>>> os.system('echo "$string"')
"; uname; : "

Although the advice of not building shell commands is still prudent;
just because none of mine or your methods to defeat haven't worked,
doesn't mean there isn't a technique that will.

It's also dependent on having a good shell -- I'm using bash 2.05b.0.

-- 
|>|\/|<
/--------------------------------------------------------------------------\
|David M. Cooke
|cookedm(at)physics(dot)mcmaster(dot)ca


From pythonguy at Hotpop.com  Thu Jan  8 06:12:30 2004
From: pythonguy at Hotpop.com (Anand Pillai)
Date: 8 Jan 2004 03:12:30 -0800
Subject: KeyboardInterrupt and threading
References: <a6562e06.0401021352.65aac82b@posting.google.com>
	<m3fzeu73k3.fsf@pc150.maths.bris.ac.uk>
	<a6562e06.0401061844.3269da85@posting.google.com>
	<m3k7442b9r.fsf@pc150.maths.bris.ac.uk>
	<a6562e06.0401071814.7f02ab1b@posting.google.com>
Message-ID: <84fc4588.0401080312.4f96b409@posting.google.com>

There is an easier way than using signals.

Add a keyboard interrupt handler for your main function.
And in the handler code, write a clean up function which
will be able to then manage threads.

This is the method I have used in my HarvestMan program.
I am copying this code here.

------------(copied code)----------------------------------------
            try:
                self.start_project()
            except (KeyboardInterrupt, EOFError):
                # Localise links
                if not self._cfg.ignorekbinterrupt:
                    # dont allow to write cache, since it
                    # screws up existing cache.
                    GetObject('datamanager').conditional_cache_set()
                    self.clean_up()
---------------------------------------------------------------------

The clean_up method takes care of cleaning the thread.
There you can add code to pass on the interrupt to the
main thread or perform your own clean up actions.

One way to do this is to use the currentThread() method
of threading module which can tell you whether the thread
is the main or a worker. 

One drawback with this method is that you might need to
set your threads as 'daemon' threads to make sure that
the threads dont hang your python program. This is because
the entire python program exits when the only threads left
are daemon threads.

-Anand

q2n8byu02 at sneakemail.com (Ivan Nestlerode) wrote in message news:<a6562e06.0401071814.7f02ab1b at posting.google.com>...
> Michael Hudson <mwh at python.net> wrote in message news:<m3k7442b9r.fsf at pc150.maths.bris.ac.uk>...
> > This is hard for me to answer -- it works fine for me.  What platform
> > are you on?  ISTR Debian, but not versions of anything.
> > 
> > I'm somewhat inclined to start blaming libc at this point...
> > 
> > As you may well be aware, the combination of threads and signals is a
> > bit of a minefield.  Python runs all threads other than the main
> > thread with all signals masked. My understanding is that when a signal
> > is delivered to a process it's delivered to an arbitrary thread that
> > has that signal unmasked -- in Python's case, this should be the main
> > thread.  It kind of sounds like in your case the signal is being
> > queued up on a non-main thread, but as the signal is never unblocked,
> > it never gets handled.
> > 
> > [...]
> > > I think this is a bug though (I shouldn't have to put hacks into the
> > > main thread to get this to work).
> > 
> > Agreed, but I'm not sure they're in Python.
> > 
> > > Any thoughts?
> > 
> > Upgrade glibc?
> > 
> > Cheers,
> > mwh
> 
> I've filed the bug with Debian since I think it is something wrong
> with their Python or their glibc. The bug is #226547.
> 
> FYI, here are the exact details of the kernel/packages that don't seem
> to work:
> 
> $ uname -a
> Linux debian 2.4.23 #1 Sun Nov 30 21:11:49 EST 2003 i686 GNU/Linux
> 
> packages and versions:
> ii  libbz2-1.0                1.0.2-1
> ii  libc6                     2.3.2.ds1-10
> ii  libdb4.1                  4.1.25-10
> ii  libncurses5               5.3.20030719-4
> ii  libreadline4              4.3-8
> ii  libssl0.9.7               0.9.7c-5
> ii  python                    2.3.3-4
> ii  python2.3                 2.3.3-4
> ii  zlib1g                    1:1.2.1-3
> 
> 
> -Ivan


From jjl at pobox.com  Mon Jan 12 18:29:35 2004
From: jjl at pobox.com (John J. Lee)
Date: 12 Jan 2004 23:29:35 +0000
Subject: Why learn Python ??
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<btubno$bd8k6$1@ID-46268.news.uni-berlin.de>
	<tyf1xq5fbdb.fsf@pcepsft001.cern.ch>
Message-ID: <87hdz0g2zk.fsf@pobox.com>

Jacek Generowicz <jacek.generowicz at cern.ch> writes:
[...]
> If you want to perform miracles, then learn Lisp. If you
> merely want to write programs that rock, then learn Python.
[...]

...and then somebody argues that macros aren't a programming language
feature, but a harmful means of inventing new languages, and then we
get into that endless macro thread again...


John


From somebody at nowhere.com  Tue Jan 13 01:57:46 2004
From: somebody at nowhere.com (Sean Richards)
Date: Tue, 13 Jan 2004 19:57:46 +1300
Subject: Accessing "GIS (ESRI shape file)" files from Python ?
References: <282f826a.0401121907.498543e6@posting.google.com>
Message-ID: <87r7y4gwt1.fsf@hugin.valhalla.net>


http://thuban.intevation.org/ 

I have not used this but it purports to be able to read ESRI shapefiles
and is written in Python + wxPython. If you are not totally dogmatic
about using Python then you could just download ESRI's arcexplorer which
seemed pretty useful when I used it several years ago

Sean

-- 
"Hver sin smak", sa vintapperen, han drakk mens de andre sloss.


From cpl.19.ghum at spamgourmet.com  Wed Jan 28 07:03:06 2004
From: cpl.19.ghum at spamgourmet.com (Harald Massa)
Date: Wed, 28 Jan 2004 13:03:06 +0100
Subject: package similar to XML::Simple
References: <bv80qq$kbg$1@sunnews.cern.ch>
Message-ID: <Xns947E8625CCA59cpl19ghumspamgourmet@62.153.159.134>

Paulo Pinto 

> does anyone know of a Python package that
> is able to load XML like the XML::Simple
> Perl package does?

Good to ask! I know of at least 3 packages that do sth. similiar.

- Fredrik Lundhs elementtree
- D. Merzs gnosis xml utilities
- handyxml 

just google for them.


From __peter__ at web.de  Fri Jan 16 05:13:41 2004
From: __peter__ at web.de (Peter Otten)
Date: Fri, 16 Jan 2004 11:13:41 +0100
Subject: Make a function call itself after set amount of time
References: <bu0v1v$qio$1@solaris.cc.vt.edu> <bu106b$s16$1@solaris.cc.vt.edu>
	<bu1g42$1bg$07$1@news.t-online.com>
	<bu1k8p$1rh$1@solaris.cc.vt.edu>
Message-ID: <bu8da7$hqa$06$1@news.t-online.com>

Bart Nessux wrote:

> Peter Otten wrote:
>> Bart Nessux wrote:
>> 
>> 
>>>Bart Nessux wrote:
>>>
>>>>How do I make a function call itself every 24 hours. Also, is there a
>>>>way to start the program automatically w/o depending on the OS functions
>>>>like 'Task Scheduler' or 'Start Up Items'... this is on Windows 2k and
>>>>xp. Below is an example of what I'm trying to do.
>> 
>> 
>> [...]
>> 
>> 
>>>I figured it out. I added this to the function definition:
>>>ipconfig_email()
>> 
>> 
>> Note that Python has a limit for nesting functions:
>> 
>> 
>>>>>depth = 0
>>>>>def callself():
>> 
>> ...     global depth
>> ...     depth += 1
>> ...     callself()
>> ...
>> 
>>>>>try:
>> 
>> ...     callself()
>> ... except RuntimeError, e:
>> ...     print "depth", depth
>> ...     print e
>> ...
>> depth 999
>> maximum recursion depth exceeded
>> 
>> 
>>>>>999/365.25
>> 
>> 2.7351129363449691
>> 
>> This means that your app will probably crash in less than three years.
>> Would that be a problem on W2K ?
>> 
>> If so, a loop could go much longer:
>> 
>> while True:
>>     ipconfig_email()
>> 
>> Seriously, you should reconsider the OS features.
>> 
>> Peter
>> 
> 
> The computers are turned off and on... the script starts at boot. I
> don't think I'll hit a limit, do you?

No, I just wanted to warn you that your recipe may fail when applied on
tasks that are invoked with higher frequency - and of course test your
confidence in W2K :-)

Peter


From bdash at gmx.net  Tue Jan 13 07:18:16 2004
From: bdash at gmx.net (Mark Rowe)
Date: Wed, 14 Jan 2004 01:18:16 +1300
Subject: pycap installation problem
In-Reply-To: <btn3mk+8drm@eGroups.com>
References: <btn3mk+8drm@eGroups.com>
Message-ID: <4003E208.80600@gmx.net>

fahad wrote:
> Hi,
> I'm trying to install pycap-0.1.6 using following commnad:
> python setup.py build --compiler=mingw32
> but it throws a lot of errors about missing files some of them is:

[snip]

Hi,

Currently pycap has not been tested under Windows.  I have made brief
attempts to get it to compile but as of yet I have not succeeded
(http://pycap.sourceforge.net/todo.html).  The biggest problems that I
experienced when trying to compile on Windows were my inability to
convince the compiler to find libnet's header files.  This seems to be
similar to the problem that you are experiencing.

The solution may be as simple as patching setup.py to point your
compiler in the right direction for the header files on your system, but
other code changes may also be necessary to make pycap function
correctly under Windows.

When I next have some free time and access to a Windows machine I will
make another attempt at making pycap compile smoothly out of the box on
Windows.  Patches and other advice in this avenue would be most welcome.

In the mean time, if your need for a packet capturing and injection
library from Python under Windows is pressing, take a look at the
Pcapy/Impacket combo provided by Core Security Technologies
(http://oss.coresecurity.com/).

Thanks for the interest,

Mark Rowe
http://bdash.bluewire.net.nz





From bignose-hates-spam at and-benfinney-does-too.id.au  Mon Jan 26 20:23:56 2004
From: bignose-hates-spam at and-benfinney-does-too.id.au (Ben Finney)
Date: 27 Jan 2004 12:13:56 +1050
Subject: Single and double asterisks preceding variables in function
	arguments
References: <bv3d4e$1h7$1@newshost.mot.com>
	<iseb10h7su5g31u9e7su6hd2kpkorj0g7a@4ax.com>
Message-ID: <slrnc1bgis.lot.bignose-hates-spam@iris.polar.local>

On Mon, 26 Jan 2004 20:15:22 -0500, Eric Amick wrote:
> Try section 4.7.2 of the tutorial.

Matter of fact, try the whole tutorial, beginning to end.  It will
answer many questions you haven't thought of yet.

    <http://www.python.org/doc/tut/>

-- 
 \             "Those are my principles. If you don't like them I have |
  `\                                         others."  -- Groucho Marx |
_o__)                                                                  |
Ben Finney <http://bignose.squidly.org/>


From oliphant at ee.byu.edu  Mon Jan 19 15:32:51 2004
From: oliphant at ee.byu.edu (Travis Oliphant)
Date: Mon, 19 Jan 2004 14:32:51 -0600
Subject: Status of Numeric
Message-ID: <400C3EF3.8090005@ee.byu.edu>


Numarray is making great progress and is quite usable for many 
purposes.  An idea that was championed by some is that the Numeric code 
base would stay static and be replaced entirely by Numarray.

However, Numeric is currently used in a large installed base.  In 
particular SciPy uses Numeric as its core array.  While no doubt 
numarray arrays will be supported in the future, the speed of the less 
bulky Numeric arrays and the typical case that we encounter in SciPy of 
many, small arrays will make it difficult for people to abandon Numeric 
entirely with it's comparatively light-weight arrays.

In the development of SciPy we have encountered issues in Numeric that 
we feel need to be fixed.    As this has become an important path to 
success of several projects (both commercial and open) it is absolutely 
necessary that this issues be addressed.

The purpose of this email is to assess the attitude of the community 
regarding how these changes to Numeric should be accomplished. 

These are the two options we can see:
* freeze old Numeric 23.x  and make all changes to Numeric 24.x  still 
keeping Numeric separate from  SciPy
* freeze old Numeric 23.x and subsume Numeric into SciPy essentially 
creating a new SciPy arrayobject that is fast and lightweight.  Anybody 
wanting this new array object would get it by installing scipy_base.  
Numeric would never change in the future but the array in scipy_base would.

It is not an option to wait for numarray to get fast enough as these 
issues need to be addressed now.  Ultimately I think it will be a wise 
thing to have two implementations of arrays: one that is fast and 
lightweight optimized for many relatively small arrays, and another that 
is optimized for large-scale arrays.  Eventually, the use of these two 
underlying implementations should be automatic and invisible to the user.

A few of the particular changes we need to make to the Numeric 
arrayobject are:

1) change the coercion model to reflect Numarray's choice and eliminate 
the savespace crutch.
2) Add indexing capability to Numeric arrays (similar to Numarray's)
3) Improve the interaction between Numeric arrays and scalars.
4) Optimization:

Again, these changes are going to be made to some form of the Numeric 
arrays.  What I am really interested in knowing is the attitude of the 
community towards keeping Numeric around.   If most of the community 
wants to see Numeric go away then we will be forced to  bring the 
Numeric array under the SciPy code-base and own it there.

Your feedback is welcome and appreciated. 

Sincerely,

Travis Oliphant and other SciPy developers




From amonroejj at yahoo.com  Thu Jan 15 08:10:03 2004
From: amonroejj at yahoo.com (R. Alan Monroe)
Date: Thu, 15 Jan 2004 13:10:03 GMT
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
	<pan.2004.01.14.01.17.00.970198@fakeemail.com>
	<bu2ana$bmpci$1@ID-207230.news.uni-berlin.de>
	<Xns94711BBF5F7D6JanC@213.119.4.35>
Message-ID: <LiwNb.8126$f97.2162@fe3.columbus.rr.com>

In article <Xns94711BBF5F7D6JanC at 213.119.4.35>, usenet at janc.cjb.net wrote:
>"Brandon J. Van Every" <try_vanevery_at_mycompanyname at yahoo.com> schreef:
>
>> I am not sure how I feel about it.  I think it only bothers me when
>> they claim to be cross-platform in theory, and the Windows build
>> simply does not work in practice.  A working Windows build should be
>> easy to obtain all the dependencies for, and it should just build. 
>> When it doesn't do that, when you have to chase all over Hell's green
>> acre to find the libraries, and then the build simply coughs and gags
>> and dies, I'm not even slightly amused at how "cross-platform" some
>> Linuxer is claiming things to be. 
>
>You think "cross-platform" means "it runs out-of-the-box on all possible 
>platforms that ever existed, now exist, and will ever exist"?
>
>Please go searching and come back when you find 1 (one) program which fits 
>that definition...  :-p

"Hello World"? :^)

Alan


From kenfar42 at yahoo.com  Sat Jan 24 00:03:01 2004
From: kenfar42 at yahoo.com (Ken)
Date: 23 Jan 2004 21:03:01 -0800
Subject: closing database connections
References: <71fd0ae5.0401230838.309e9b02@posting.google.com>
Message-ID: <ea65eb54.0401232103.b530852@posting.google.com>

dlee at rightnow.com (dustin lee) wrote in message news:<71fd0ae5.0401230838.309e9b02 at posting.google.com>...
>  I'd be interested to hear if any one has been bitten by not
> explicitly closing database connections and under what cirumstances. 
> My main fear is that I will "run out of" database connections or in
> some other way adversely affect server performance.  I'm using recent
> versions of both mysql and oracle.

Yep, you should definitely and explicitely close database connections.
 Failure to do so can easily leave connections open and resources
locked - not much unlike closing your ssh sessions by killing the
client rather that logging out.

Kind of a coincidence my seeing this email actually - just two minutes
ago I read an email from a team member instructing others on the team
to close their database connections (php/db2) because some connections
occasionally hang and interfere with our loads.


ken


From peter at engcorp.com  Tue Jan  6 08:39:52 2004
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 06 Jan 2004 08:39:52 -0500
Subject: Python for Embedded Devices?
References: <efa6f675.0401021920.3bffced0@posting.google.com>
	<vvdl0nbogvm74@corp.supernews.com>
	<221e7b06.0401041537.2896b22d@posting.google.com>
Message-ID: <3FFABAA8.2D35FD03@engcorp.com>

Phil Schmidt wrote:
> 
> I am one such developer who works with very small systems: 8-bit
> micros with under 128K flash and 4K RAM. I am keenly interested in
> Python or some other similar langauge that would run on such hardware.
> 'C' is the usual language for such environments, but I believe that,
> in many cases, using a dynamic and 'object-able' language would reduce
> development time and improve product quality significantly.
> 
> I've looked at Io, Lua, PyMite and Pippy, to name a few, and none are
> quite appropriate. Io is perhaps the closest match, if it were
> stripped down a lot.

Would you be willing to spend a sentence or two describing what basic
problems you feel each of those has for your application?

-Peter


From hatespam at fakeemail.com  Tue Jan 13 20:17:05 2004
From: hatespam at fakeemail.com (Dan Olson)
Date: Tue, 13 Jan 2004 19:17:05 -0600
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
Message-ID: <pan.2004.01.14.01.17.00.970198@fakeemail.com>


As a person heavily involved in the pseudo-commercial Linux game industry
and a Linux user in general, I must say that I agree with your general
assessment that Linux users do far too little to make sure that their
applications run and run well on Windows.

That said, I disagree that Open Source projects have little to no value in
commercial projects.  There are countless examples that could be pointed
out, but I'll just point out one of them: OpenAL.

Here is my future advice: get a month and a half into a project before
announcing it.  Not only will you have people not saying "I told you so"
if you scrap it, but people will in general be more interested in your
project when you have something to show for it.

Are you planning to make your vs.net version of FreeCiv available?  Others
might be interested in continuing the work.  Cygwin is a horrible horrible
way to run things on Windows, and I'd like to take this time to insult the
mothers of everyone who has ever made their Linux application run on
Windows using only Cygwin.


From param at cs.wisc.edu  Mon Jan 19 15:26:04 2004
From: param at cs.wisc.edu (Paramjit Oberoi)
Date: Mon, 19 Jan 2004 14:26:04 -0600
Subject: ConfigParser - setting the order of  options in a section
In-Reply-To: <e10307b1.0401190724.6ef7fa69@posting.google.com>
References: <e10307b1.0401190724.6ef7fa69@posting.google.com>
Message-ID: <Pine.LNX.4.58.0401191420530.21007@mickey.cs.wisc.edu>

> I am trying unsuccessfully to set the order of options using  the
> set(section,option,value) method ( Python 2.2.2) and writing to a
> file. But the options always appear in a random order. Before each
> option I am writing a comment line using set(section,"#",value) - a
> one line explanation for the option that follows - but the comments
> get re-ordered randomly.

There is a module which was originally written for the SpamBayes
project which probably does what you want. Search Google Groups
for 'UpdatableConfigParser' for details.


From gerrit at nl.linux.org  Tue Jan 20 13:32:04 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Tue, 20 Jan 2004 19:32:04 +0100
Subject: Python T-shirt
In-Reply-To: <400D6C40.2070802@coretrek.com>
References: <400D6C40.2070802@coretrek.com>
Message-ID: <20040120183204.GA4266@nl.linux.org>

Vidar Braut Haarr wrote:
> I was looking for a Python Tshirt the other day, and I couldn't find any 
> good ones.. Therefore I made this one:
> <http://www.cafeshops.com/vidarbhaarr/>
> 
> The source images can be found here:
> <http://lanklan.org/mabus/>
> 
> The code on the back of it was written by a very cool guy.. I don't 
> remember who. Thanks, anyways! :)
> 
> Anyways, feel free to shop! I'm not getting any profit from this. I'm 
> not a python guy (I made the shirt as a birthday presant to a buddy), so 
> don't ask me about the code. I also don't subscribe to this list, so if 
> you reply, please include me as To/Cc.

I think there once was a shirt with just the text "import this" on it,
and that was the only reason to include this.py to Python... I'm not
sure, though.

yours,
Gerrit.

-- 
257. If any one hire a field laborer, he shall pay him eight gur of
corn per year.
          -- 1780 BC, Hammurabi, Code of Law
-- 
PrePEP: Builtin path type
    http://people.nl.linux.org/~gerrit/creaties/path/pep-xxxx.html
Asperger's Syndrome - a personal approach:
	http://people.nl.linux.org/~gerrit/english/



From timr at probo.com  Wed Jan 28 03:27:26 2004
From: timr at probo.com (Tim Roberts)
Date: Wed, 28 Jan 2004 00:27:26 -0800
Subject: wxPython: images from URLs
References: <mailman.810.1075149139.12720.python-list@python.org>
Message-ID: <fgse10l8pae12p0els55fsujllq2irrj0l@4ax.com>

Jonathan Daugherty <cygnus at cprogrammer.org> wrote:
>
>Does anyone here know if the wxImage class in wxPython supports dislaying
>images from URLs?

wxImage will read from a file or from a wxWindows stream.  It won't
download from a web site, but that's trivially easy using something like
urllib.
-- 
- Tim Roberts, timr at probo.com
  Providenza & Boekelheide, Inc.


From no at spam.pls  Mon Jan 12 04:34:07 2004
From: no at spam.pls (Matthias)
Date: 12 Jan 2004 10:34:07 +0100
Subject: Straw poll on Python performance (was Re: Python is far from a
	top performer ...)
References: <ryELb.238$tK2.228@amstwist00>
	<3fff234a$0$129$e4fe514c@dreader3.news.xs4all.nl>
	<3FFF26A1.943DEA84@engcorp.com>
Message-ID: <36wptdp7bow.fsf@chagall.ti.uni-mannheim.de>

Peter Hansen <peter at engcorp.com> writes:

> This is my "straw poll" question:
> 
>   Do you spend a "significant" amount of time actually optimizing your 
>   Python applications?  (Significant is here defined as "more than five
>   percent of your time", which is for example two hours a week in a 
>   40-hour work week.)

I was working on an image processing application and was looking for a
quick prototyping language.  I was ready to accept a 10-fold decrease
in execution speed w.r.t. C/C++.  With python+psycho, I experienced a
1000-fold decrease.

So I started re-writing parts of my program in C.  Execution speed now
increased, but productivity was as low as before (actually writing the
programs directly in C++ felt somewhat more natural).  Often it
happened that I prototyped an algorithm in python, started the
program, implemented the algorithm in C as an extension module and
before the python algorithm had finished I got the result from the
C-algorithm. :-(

I've tried numerics, but my code was mostly not suitable for
vectorization and I did not like the pointer semantics of numerics.

So my answer to the question above is NO, I don't spend significant
times optimizing python code as I do not use python for
computationally intensive calculations any more.  My alternatives are
Matlab and (sometimes) Common Lisp or Scheme or Haskell.



From jcarlson at uci.edu  Wed Jan 21 01:09:53 2004
From: jcarlson at uci.edu (Josiah Carlson)
Date: Tue, 20 Jan 2004 22:09:53 -0800
Subject: Introspection and member ordering
References: <6f03c4a5.0401202118.d17d7a8@posting.google.com>
Message-ID: <20040120214835.3E3E.JCARLSON@uci.edu>

> Is there a way to get any sort of introspection which would return the
> content of an instance *in the order they were declared or executed*
> as opposed to alphabetical order?
> 
> Example:
> 
> >>> class a:
> ...    def __init__(self):
> ...       self.value = 12
> ...       self.avalue = 78
> >>> class b(a):
> ...    def __init__(self):
> ...       a.__init__(self)
> ...       self.bvalue = 5
> ...    def f(self):
> ...       self.z = 3
> ... 
> >>> c=b()
> >>> c.__dict__
> {'bvalue': 5, 'avalue': 78, 'value': 12}
> 
> Wrong answer, I am looking for something that would give me
> {'value':12, 'avalue':78, 'bvalue':5'}
> 
> I tried the inspect.getmembers(c) without success.
> 
> Anyone has some advice how I can get the members listed in declaration
> or execution order?

Rim,

You'd have to either overload the class's __getattribute__, __setattr__
and __delattr__ methods, or replace the builtin instance.__dict__
attribute with a new dictionary-like object that will produce the
ordering you want.

As an option, I've written an LRU that does such kinds of updates
quickly, though it also updates on read.  Reading the comment at the
bottom will allow you to translate the update on read, to only updating
on write.  The recipe is available here:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/252524

Doing a quick check, it doesn't look like you can say:
self.__dict__ = NON_DICT_OBJECT

Making LRU a subclass of dict seems to work on the surface, but it looks
to break a few things.  Perhaps I should rewrite LRU to be more Pythonic.

Until then, you'll have to update __getattribute__, __setattr__ and
__delattr__.

 - Josiah



From jayoconnor at earthlink.net  Sat Jan 31 18:49:34 2004
From: jayoconnor at earthlink.net (Jay O'Connor)
Date: Sat, 31 Jan 2004 23:49:34 GMT
Subject: OT: why do web BBS's and blogs get so slow?
In-Reply-To: <7xbrojk9rk.fsf_-_@ruckus.brouhaha.com>
References: <7xbrojk9rk.fsf_-_@ruckus.brouhaha.com>
Message-ID: <iaXSb.5081$uM2.2552@newsread1.news.pas.earthlink.net>

Paul Rubin wrote:
> Lots of times, when a blog (that supports user comments) or a web BBS
> gets heavily loaded, it slows down horribly, even when it's hosted at
> an ISP on a fast computer with plenty of net bandwidth.  I'm wondering
> what those programs are doing, that makes them bog down so badly.
> Anyone know what the main bottlenecks are?  I'm just imagining them
> doing a bunch of really dumb things.
> 
> I'm asking this on clpy because thinking about the problem naturally
> made me wonder how I'd write a program like that myself, which of
> course would mean using Python.
> 
> FWIW, here's how I'd do it:
> 
> 1) It would be single threaded web server (asyncore, twistedmatrix)
> with a select loop talking to a socket, either on port 80 directly, or
> to a proxy web server running mod_gzip, SSL, and so forth.


> 2) It might use MySQL for infrequent operations like user info lookup
> at login time or preference updates, but not for frequent operations
> like reading and posting messages.  User session info and preferences
> would be in ram during a session, in a python dict indexed by a
> browser session cookie.


This is similar to what I wrote in Smalltalk several years and is now running 
http://www.ezboard.com



From ketulp_baroda at yahoo.com  Sat Jan 10 06:58:09 2004
From: ketulp_baroda at yahoo.com (ketulp_baroda at yahoo.com)
Date: 10 Jan 2004 03:58:09 -0800
Subject: what is best for web development??
Message-ID: <f046efac.0401100358.5aa812a0@posting.google.com>

i am developing a web application and i am really confused on what should i use.
should i use just python and use the cgi module availabe.
Or should i use application like WebWare.Also there is PSP available.
I am really confused and need help


From guido.schimmels at freenet.de  Fri Jan 23 15:47:39 2004
From: guido.schimmels at freenet.de (Guido Schimmels)
Date: Fri, 23 Jan 2004 22:47:39 +0200
Subject: How to build Tkinter as extension module?
Message-ID: <pan.2004.01.23.20.47.38.531142@freenet.de>

When I build python with tkinter support (Linux), the python interpreter
is linked to the tcl/tk shared libraries, thus making them a hard
dependency. That is unfortunate. A friend told me, Debian supports tkinter
via an autonomous extension module. I have looked at the Debian rules file
but wasn't able to discover the trick. 



From EP at zomething.com  Tue Jan 13 21:38:45 2004
From: EP at zomething.com (EP)
Date: Tue, 13 Jan 2004 18:38:45 -0800
Subject: Myth or Urban Legend? Python => Google   [ was: Why learn Python ??]
In-Reply-To: <873cajafr8.fsf@pobox.com>
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<btubno$bd8k6$1@ID-46268.news.uni-berlin.de>
	<100655fo84c2211@corp.supernews.com>
	<btv7gf$btv1p$1@ID-46268.news.uni-berlin.de>
	<87d69og2jl.fsf@pobox.com>
	<bu0v9v$c6nr4$1@ID-46268.news.uni-berlin.de>
Message-ID: <5.2.0.9.0.20040113181737.00b7e730@mail.zomething.com>

Is it true that the original Google spider was written in Python?

I came across a paper on the web some time back that I saved and read just 
last night:


     The Anatomy of a Large-Scale Hypertextual Web Search Engine

     Sergey Brin and Lawrence Page
     {sergey, page}@cs.stanford.edu
     Computer Science Department, Stanford University, Stanford, CA 94305

A neat read, but I'm not sure of the authenticity of the paper: I could be 
gullible.  It would appear to be a paper written some years back on the 
genesis of the Google search engine.

[excerpt]
Running a web crawler is a challenging task. There are tricky performance 
and reliability issues and even more importantly, there are social issues. 
Crawling is the most fragile application since it involves interacting with 
hundreds of thousands of web servers and various name servers which are all 
beyond the control of the system.
In order to scale to hundreds of millions of web pages, Google has a fast 
distributed crawling system. A single URLserver serves lists of URLs to a 
number of crawlers (we typically ran about 3). Both the URLserver and the 
crawlers are implemented in Python. Each crawler keeps roughly 300 
connections open at once. This is necessary to retrieve web pages at a fast 
enough pace. At peak speeds, the system can crawl over 100 web pages per 
second using four crawlers. This amounts to roughly 600K per second of 
data. A major performance stress is DNS lookup. Each crawler maintains a 
its own DNS cache so it does not need to do a DNS lookup before crawling 
each document. Each of the hundreds of connections can be in a number of 
different states: looking up DNS, connecting to host, sending request, and 
receiving response. These factors make the crawler a complex component of 
the system. It uses asynchronous IO to manage events, and a number of 
queues to move page fetches from state to state.
[/excerpt]

It would seem like the poster boy example for using Python in some 
respects, if true.


Eric, Intrigued

"but at least I didn't top post"


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From scottdog at nospam.com  Tue Jan 20 16:21:13 2004
From: scottdog at nospam.com (Dog@will.hunt)
Date: Tue, 20 Jan 2004 13:21:13 -0800
Subject: Installing SpamBayes
References: <400c399b_2@newsfeed.slurp.net>
	<up5r00hr648soiun3j6q326ga9n808hf17@4ax.com>
Message-ID: <400c451a_1@newsfeed.slurp.net>

The instructions that came with SpamBayes says it.  THey say to either run
the setup.py file in the Python GUI (IDLE) or froma command prompt.  I have
tried both to no avail...

"Rene Pijlman" <reply.in.the.newsgroup at my.address.is.invalid> wrote in
message news:up5r00hr648soiun3j6q326ga9n808hf17 at 4ax.com...
> Dog at will.hunt:
> >It says to run the setup.py file using the following command in IDLE
>
> Where does it say that? The wordt "idle" doesn't appear on
>
http://cvs.sourceforge.net/viewcvs.py/*checkout*/spambayes/spambayes/README.
txt?rev=HEAD&content-type=text/plain
>
> >in the directory that I extracted the spambayes files into: python
setup.py
> >install.
> >
> >When I do this, it tells me that python is not a recognized command.
>                  ^^
> What exactly is "it"? Is it a Unix/Linux shell, or the Windows command
> interpreter?
>
> --
> Ren? Pijlman




From glenfant at NOSPAM.bigfoot.com  Wed Jan 28 14:16:53 2004
From: glenfant at NOSPAM.bigfoot.com (Gilles Lenfant)
Date: Wed, 28 Jan 2004 20:16:53 +0100
Subject: How to detect that a key is being pressed,
	not HAS been pressed earlier!??
References: <6ed33425.0401281103.61987e72@posting.google.com>
Message-ID: <bv91k4$13ui$1@biggoron.nerim.net>

"Rune" <runed at stud.cs.uit.no> a ?crit dans le message de
news:6ed33425.0401281103.61987e72 at posting.google.com...
> Hey
>
> I'm trying to build a gui application and need to know if the user is
> actually holding down the shift or ctrl key. That is, if the user
> currently is holding down the shift key. In pseudo code this will boil
> down to something like this:
>
> def test:
>   if user presses shift:
>     return SHIFT_IS_PRESSED
>   elif user presses ctrl:
>     return CTRL_IS_PRESSED
>   else
>     return false
>
> It's important to notice here that I'm not interested if the user has
> already pressed shift or ctrl. I'm only interested in knowing if he is
> currently holding down one of these keys. (I have looked into msvcrt
> and the like but have found no answer..) The function should also work
> in both windows and Linux.
>
> Any help is appriciated :)

You should have a look at the wxPython demo (wxKeyEvents section) that shows
how this is handled in a cross platform fashion.

Search for wxPython from www.sf.net

--
Gilles




From jhg at galdon.com  Sun Jan 25 06:27:11 2004
From: jhg at galdon.com (Juan Huertas)
Date: Sun, 25 Jan 2004 12:27:11 +0100
Subject: Embeedding OCX controls in pythonwin or wxpython
Message-ID: <bv08ki$nde$1@nsnmrro2-gest.nuria.telefonica-data.net>

It's possible to embeed OCX controls using win32com and this work fine.
But:

How it is possible to assign properties at dessing time (not accesibles at
run time) to the OCX objects?

In Visual Basic, for example, this is ease using dialogs asociated at desing
time, in IE using
parameters clause (PARAM NAME an VALUE) to define the embeeded object, etc.

In win32com or wxpython?

Please aids.

Thank You.





From bkelley at wi.mit.edu  Fri Jan 23 16:09:58 2004
From: bkelley at wi.mit.edu (Brian Kelley)
Date: Fri, 23 Jan 2004 16:09:58 -0500
Subject: closing database connections
In-Reply-To: <mailman.704.1074877690.12720.python-list@python.org>
References: <71fd0ae5.0401230838.309e9b02@posting.google.com>
	<mailman.704.1074877690.12720.python-list@python.org>
Message-ID: <40118d3b$0$567$b45e6eb0@senator-bedfellow.mit.edu>

andy wrote:

> I seem to remember reading somewhere that as client connections are a finite 
> (and often scarce) resource, it's not the client but the server that will 
> suffer when you do this.

I think there might be two issues here.  One is using the reference 
counting scheme to close files and databases, the other is to keep 
connections open, which andy seems to be referring too.

This discussion has occured a lot in the python community.  I'll give a 
case in point.  The python interface to metakit has no close method.  It 
can only be closed through reference counting and by going out of scope.

The problem with this, is that if some piece of code has a reference to 
the metakit database, it will *never* be closed and this causes hard to 
find bugs with metakit.  In C-python reference counting closes files and 
database connections "soon" after they go out of scope.  This may or may 
not be true in java python.  I haven't tested this.

The upside is that if you explicitly close the database, it will be 
closed when you expect and you don't have to worry about other objects 
having a reference to your cursor or connection or what not.

That being said, just relying on the reference count and letting python 
clean up has worked very well for me with metakit.

> hth,
> -andyj
> 
> 



From jepler at unpythonic.net  Thu Jan  8 10:00:13 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Thu, 8 Jan 2004 09:00:13 -0600
Subject: unicode keys in dicts
In-Reply-To: <20040108150835.7242ef01.jiba@tuxfamily.org>
References: <20040108150835.7242ef01.jiba@tuxfamily.org>
Message-ID: <20040108150013.GB14102@unpythonic.net>

>>> chr(0xe9) == unichr(0xe9)
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
UnicodeError: ASCII decoding error: ordinal not in range(128)

unequal objects can hash to the same value.  Your two keys are not
equal (in fact, you can't even compare them on my system).  They would
be comparable but not equal on many systems, for instance one where the
system's encoding is Microsoft's CP850.

You can misconfigure your system to assume that byte strings are in (eg)
iso-8859-1 encoding by changing site.py.

Jeff



From aisung at bubblemotions.com  Tue Jan 27 21:08:02 2004
From: aisung at bubblemotions.com (Michael G. A. Sung)
Date: Tue, 27 Jan 2004 18:08:02 -0800
Subject: PAP connection
Message-ID: <00e201c3e543$915fcc90$3c01a8c0@mike>

Hi all, 
I am new to python.  I am trying to write a script to connect to a PPG server.  so is through PAP(Push Access Protocol). How do I do so? The exact address is http://edevgate.openwave.com:9002/pap . So anyone have any idea?


Thanks in advance, Mike

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From piedmontbiz at aol.com  Wed Jan 14 19:03:50 2004
From: piedmontbiz at aol.com (PiedmontBiz)
Date: 15 Jan 2004 00:03:50 GMT
Subject: Printing to console, no scroll
References: <mailman.364.1074102636.12720.python-list@python.org>
Message-ID: <20040114190350.06766.00000031@mb-m21.aol.com>

Sorry for my post with all the ansi.py code.

I forgot the website I got it from.

Allen


From codeapocalypse at msn.com  Sat Jan 31 21:38:34 2004
From: codeapocalypse at msn.com (Brian)
Date: 31 Jan 2004 18:38:34 -0800
Subject: QT usage confusion
References: <40069912$0$251$4d4ebb8e@news.nl.uu.net>
	<bu6k89$bav$1@graf.cs.uni-magdeburg.de>
Message-ID: <ef3269df.0401311838.516b152b@posting.google.com>

Marco Bubke <marco at bubke.de> wrote in message news:<bu6k89$bav$1 at graf.cs.uni-magdeburg.de>...

> There is a new Book(look at www.trolltech.com) with the Qt 3.2.1 Windows
> non-commerial Version.
> 

Note that on the pyqt-dev mailing list, Phil Thompson has stated that
he has not decided whether or not to support the new non-comm Windows
edition/version.

Personally, I'm waiting to hear if he'll decide to support (wrap)
ActiveQt, the Qt module for support of Microsoft's ActiveX components.
 It might then be possible to convince my work mgmt. to buy a slew of
BlackAdder copies.  ;)

For more about ActiveQt, see
http://www.trolltech.com/products/qt/whitepaper/qt-whitepaper-15-1.html


From martin at v.loewis.de  Sat Jan  3 16:50:24 2004
From: martin at v.loewis.de (Martin v. Loewis)
Date: Sat, 03 Jan 2004 22:50:24 +0100
Subject: [Python-Dev] PEP 324: popen5 - New POSIX process module
In-Reply-To: <Pine.LNX.4.44.0401031442280.576-100000@aristocat.lysator.liu.se>
References: <Pine.LNX.4.44.0401031442280.576-100000@aristocat.lysator.liu.se>
Message-ID: <3FF73920.8090402@v.loewis.de>

Peter ?strand wrote:
>     This PEP describes a new module for starting and communicating
>     with processes on POSIX systems.

I see many aspects in this PEP that improve the existing implementation
without changing the interface. I would suggest that you try to enhance
the existing API (making changes to its semantics where reasonable),
instead of coming up with a completely new module.

With that approach, existing applications could use these features
with no or little change.

>     - One "unified" module provides all functionality from previous
>       functions.

I doubt this is a good thing. Different applications have different
needs - having different API for them is reasonable.

> 
>     - Cross-process exceptions: Exceptions happening in the child
>       before the new process has started to execute are re-raised in
>       the parent.  This means that it's easy to handle exec()
>       failures, for example.  With popen2, for example, it's
>       impossible to detect if the execution failed.

This is a bug in popen2, IMO. Fixing it is a good thing, but does not
require a new module.

>     - A hook for executing custom code between fork and exec.  This
>       can be used for, for example, changing uid.

Such a hook could be merged as a keyword argument into the existing
API.

>     - No implicit call of /bin/sh.  This means that there is no need
>       for escaping dangerous shell meta characters.

This could be an option to the existing API. Make sure it works on
all systems, though.

>     - All combinations of file descriptor redirection is possible.
>       For example, the "python-dialog" [2] needs to spawn a process
>       and redirect stderr, but not stdout.  This is not possible with
>       current functions, without using temporary files.

Sounds like a new function on the popen2 module.

>     - With popen5, it's possible to control if all open file
>       descriptors should be closed before the new program is
>       executed.

This should be an option on the existing API.

>     - Support for connecting several subprocesses (shell "pipe").

Isn't this available already, as the shell supports pipe creation,
anyway?

>     - Universal newline support.

This should be merged into the existing code.

>     - A communicate() method, which makes it easy to send stdin data
>       and read stdout and stderr data, without risking deadlocks.
>       Most people are aware of the flow control issues involved with
>       child process communication, but not all have the patience or
>       skills to write a fully correct and deadlock-free select loop.

Isn't asyncore supposed to simplify that?

So in short, I'm -1 on creating a new module, but +1 on merging
most of these features into the existing code base - they are good
features.

Regards,
Martin




From peter at engcorp.com  Mon Jan 19 10:48:36 2004
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 19 Jan 2004 10:48:36 -0500
Subject: Escaping slashes (double backslash plague)
References: <mailman.500.1074516185.12720.python-list@python.org>
Message-ID: <400BFC54.FC6EADF4@engcorp.com>

Aloysio Figueiredo wrote:
> 
> I need to replace every ocurrence of '/' in s by '\/'
> in order to create a file named s. My first attempt
> was:
> 
> s = '\/'.join(s.split('/'))
> 
> but it doesn't work:
> 
> >>> s = 'a/b'
> >>> s = '\/'.join(s.split('/'))
> >>> s
> 'a\\/b'
> >>> repr(s)
> "'a\\\\/b'"
> >>>
> 
> '\/'.join() escapes the backslashes and I don't know why.

It does not, although *you* are not escaping the backslash
yourself, and that is dangerous.  Get in the habit of always
escaping your own backslashes, so that if you ever happen
to use a backslash followed by one of the characters which _is_
a valid escape sequence, you won't get confused.

 '\/' == '\\/'

but 

 '\t' != '\\t'

The first example shows two ways of writing a string with the blackslash
character followed by a forward slash.  The second example shows a TAB
character on the left, but a backslash plus the letter 't', on the right.

As for your apparent automatic escaping of backslashes: when you show
results in an interactive session by just typing the expression, such as
when you do ">>> s"   you will see the repr() of the value, not the actual
content.  Use print instead and you'll see the difference:

>>> print s

This is all covered pretty well, I think, by the Python tutorials and
such.  Have you gone through those?

-Peter


From seanl at chaosring.org  Sat Jan  3 15:24:10 2004
From: seanl at chaosring.org (Sean R. Lynch)
Date: Sat, 03 Jan 2004 12:24:10 -0800
Subject: Creating a capabilities-based restricted execution system
In-Reply-To: <yJacnYxpY-E2kWqiXTWc-w@speakeasy.net>
References: <LmmdnUn4seDeGWuiXTWc-w@speakeasy.net>
	<7xznd58klr.fsf@ruckus.brouhaha.com>
	<MGudndQhy9ieEmuiXTWc-w@speakeasy.net>
	<bt6bec$25j$06$1@news.t-online.com>
	<yJacnYxpY-E2kWqiXTWc-w@speakeasy.net>
Message-ID: <ML2cncyEgvt2uWqiXTWc-g@speakeasy.net>

I hate replying to myself, but I've written some more code. I hope to 
have something posted soon so people can rip it apart without needing to 
resort to conjecture  :)

I had been considering using a name-mangled setattr for doing attribute 
assignment to only allow assignment to attributes on descendants of the 
class one was writing methods on, but it occurred to me that I could 
probably treat "self" as a special name using only compiler 
modifications, so I could eliminate RestrictedPython's need to turn all 
Getattrs and AssAttrs (shouldn't it be GetAttr) into method calls. Now, 
of course, I'm limited to static checks on names to control access, but 
Python already disallows, for example, access to f.func_globals, and 
RestrictedPython disallows names that begin with underscore.

Now I need to write a bunch of code that uses this system and attempts 
to break it  :)


From martin at v.loewis.de  Sat Jan  3 16:17:20 2004
From: martin at v.loewis.de (Martin v. =?iso-8859-15?q?L=F6wis?=)
Date: 03 Jan 2004 22:17:20 +0100
Subject: Creating a capabilities-based restricted execution system
References: <LmmdnUn4seDeGWuiXTWc-w@speakeasy.net>
	<7xznd58klr.fsf@ruckus.brouhaha.com>
	<MGudndQhy9ieEmuiXTWc-w@speakeasy.net>
	<bt6bec$25j$06$1@news.t-online.com>
	<yJacnYxpY-E2kWqiXTWc-w@speakeasy.net>
Message-ID: <m31xqgag0v.fsf@mira.informatik.hu-berlin.de>

"Sean R. Lynch" <seanl at chaosring.org> writes:

> RestrictedPython avoids this by removing the type() builtin from the
> restricted __builtins__, and it doesn't allow untrusted code to create
> names that start with _.

Ah, ok. That might restrict the usefulness of the package (perhaps
that is what "restricted" really means here :-).

People would not normally consider the type builtin insecure, and
might expect it to work. If you restrict Python to, say, just integers
(and functions thereof), it may be easy to see it is safe - but it is
also easy to see that it is useless.

The challenge perhaps is to provide the same functionality as rexec,
without the same problems.

Regards,
Martin


From http  Sat Jan 24 18:12:26 2004
From: http (Paul Rubin)
Date: 24 Jan 2004 15:12:26 -0800
Subject: crypt, md5, sha modules
References: <buurgk$mflug$1@ID-165840.news.uni-berlin.de>
Message-ID: <7xy8rxc55x.fsf@ruckus.brouhaha.com>

Marco Herrn <herrn at gmx.net> writes:
> So my main question is: can I use the md5 module for creating hashes
> compatible with exims md5-function? And if so, how?

Examine the exim source code and see what it's doing, then code
something interoperable with the md5 module.


From altis at semi-retired.com  Mon Jan 26 17:03:25 2004
From: altis at semi-retired.com (Kevin Altis)
Date: Mon, 26 Jan 2004 14:03:25 -0800
Subject: wxPython: images from URLs
References: <mailman.810.1075149139.12720.python-list@python.org>
Message-ID: <j6gRb.66$pd1.48080@news.uswest.net>

"Jonathan Daugherty" <cygnus at cprogrammer.org> wrote in message
news:mailman.810.1075149139.12720.python-list at python.org...
> Does anyone here know if the wxImage class in wxPython supports dislaying
> images from URLs?

Yes, the trick is to use StringIO to convert the data rather than saving to
a file and loading it from disk. Here's a concrete example...

ka
---

import urllib
from wxPython import wx
from cStringIO import StringIO

# I'll assume you already have an app, frame...
# to draw into if that's what you want to do

wx.wxInitAllImageHandlers()

# here's a real URL for testing purposes
url = 'http://pythoncard.sourceforge.net/images/addresses_01.png'

try:
    fp = urllib.urlopen(url)
    data = fp.read()
    fp.close()
    img = wx.wxImageFromStream(StringIO(data))
except:
    # decide what you want to do in case of errors
    # there could be a problem getting the data
    # or the data might not be a valid jpeg, png...
    pass

# now you can do whatever you want with the image




From cygnus at cprogrammer.org  Sat Jan 31 14:57:51 2004
From: cygnus at cprogrammer.org (Jonathan Daugherty)
Date: Sat, 31 Jan 2004 14:57:51 -0500
Subject: Programmers Wanted for Computer Graphics Startup Near
	Philadelphia
In-Reply-To: <bvh1eq$jjr$1@namru.matavnet.hu>
References: <2da21d6c.0401310807.671be3b7@posting.google.com>
	<bvh1eq$jjr$1@namru.matavnet.hu>
Message-ID: <20040131195751.GA16029@mail.theserver.ath.cx>

# Software patents are evil.
# Hell to them.

Agreed.

-- 

  Jonathan Daugherty
  http://www.cprogrammer.org

  "It's a book about a Spanish guy called Manual, you should read it."
                                                            -- Dilbert



From jcarlson at nospam.uci.edu  Mon Jan 26 15:54:29 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Mon, 26 Jan 2004 12:54:29 -0800
Subject: Guardian: open source is a throwback says Jack Schofield
In-Reply-To: <40156FB6.F71C19B0@engcorp.com>
References: <64cff82f.0401251143.328388bd@posting.google.com>
	<mailman.772.1075066543.12720.python-list@python.org>
	<bv1jkf$g46$1@namru.matavnet.hu>
	<bv1pgj$ctl$3@news.service.uci.edu> <40156FB6.F71C19B0@engcorp.com>
Message-ID: <bv3uu6$nlj$1@news.service.uci.edu>

>>Never underestimate the power of stupidity (or ignorance, or denial, or...).
>>
>>Speaking of which...
>>http://www.whitehouse.gov/news/releases/2004/01/20040122-5.html
>>
>>  - Josiah
> 
> 
> I'm sorry, really, to bring this up, but as a Canadian I might be a little
> thick on this point, so help me out: was that site hacked?  Or is this for
> real?
> 
> -Peter

Peter,

I understand your confusion.  You are thinking, "Surely the president of 
the United States can't be that foolish."  That is what the entire world 
thought...until they started listening to what he had to say.

The history of the Iraq war, told entirely in lies:
http://www.harpers.org/RevisionThing.html?pg=1

Dishonest Dubya Action Figure (all unaltered quotes from GWB):
(could be short on bandwidth, resulting in a 509 error)
http://www.praesentia.us/archives/dishonestdubya.html


Let us hope the general population votes consistantly for a single, 
non-GWB candidate.  Dean would be fine, Clark would be better.
  - Josiah


From mhammond at skippinet.com.au  Fri Jan 30 18:53:41 2004
From: mhammond at skippinet.com.au (Mark Hammond)
Date: Sat, 31 Jan 2004 10:53:41 +1100
Subject: win32com support
In-Reply-To: <Xns947FEAF73D102crawleystormntlworld@217.158.240.24>
References: <Xns947FEAF73D102crawleystormntlworld@217.158.240.24>
Message-ID: <bveqqb$1fue$1@arachne.labyrinth.net.au>

Crawley wrote:

> Im trying to produce a small Visual Studio Addin.  Taking the 
> OutlookAddin example and changing the registry place it installs too, 
> everything works ok.  
> 
> Examples in C++ show that in the OnConnection method I have to registry 
> my commands and also pass an instance of my sub class of ICommands.
> 
> The C code looks like this:
> 
> 	IApplication* pApplication = NULL;
> 	pApp->QueryInterface(IID_IApplication, (void**) &pApplication)
> 
> 	CCommandsObj::CreateInstance(&m_pCommands);
> 	m_pCommands->AddRef();
> 	m_pCommands->SetApplicationObject(pApplication);
> 
> 	pApplication->SetAddInInfo((long) AfxGetInstanceHandle(),                                       
> (LPDISPATCH) m_pCommands, -1, -1, m_dwAddin));
> 
> 
> So far Im trying something like this:
> 
>         self._command = VCCmd(application)
>         application.SetAddInInfo(AfxGetInstanceHandle(), self._command, -
> 1, -1, addin )        
>  
> 
> with VCCmd defined like:
> 
> class VCCmd:
>     _com_interfaces_ = ['_ICommands']
>     _public_methods_ = []
>     
>     _application = None
>     
>     def __init__( self, app ):
>         self._application = app
>         print "VCCmd __init__"
> 
> 
> Needless to say, its not working, so questions.
> 
> 1) AfxGetInstanceHandle dosent appear to exist in the win32api... so how 
> do I call it.

AfxGetInstanceHandle returns the handle to your MFC built DLL.  The 
assumption is that your object is built into a nice, single little DLL.

This doesn't make sense for Python.  Your code is not implemented in a 
DLL at all, but in a .py file.  There are a few DLLs involved 
(pythonxx.dll, pythoncomxx.dll), and the handles to these can be found 
pretty easily - but it is unclear if that helps you.

You really need to determine *why* SetAddInInfo() wants a DLL handle and 
what the implications are.  My guess is that it expects to be able to 
pull Win32 resources (such as bitmaps, menus, etc) from that DLL, which 
may be a problem.

> 2) am I defining VCCmd correctly to be a subclass of ICommands

That looks OK, assuming that the type library where ICommands is defined 
has been registered for universal support.  You will note the Outlook 
addin sample specifies the generic IDTExtensibility interface - if 
ICommands is VS specific (and therefore in a different typelib), then it 
is likely you also need to specify that additional typelib.

> 
> 3) am I correct in thinking i dont have to explicitly 'cast' application 
> into an IApplication instance

Correct - the framework will automatically perform a QI in most cases. 
Of course, if your object is not implemented correctly, this QI will fail.

> 
> Many thanks for any light you may be able to shed on the subject

Register your addin with "--debug" on the command-line.  Then use the 
Pythonwin "Remote Trace Collector" tool, and you should see lots of 
output as your object is instantiated and used.  You should also be able 
to see most exceptions raised by your object, which are generally 
invisible without this debugging technique.

When you get it working, consider contributing it back as a sample I can 
put next to the Outlook one ;)

Mark.



From M at a.k  Fri Jan  2 11:03:07 2004
From: M at a.k (Midas)
Date: Fri, 02 Jan 2004 16:03:07 GMT
Subject: Passing to a function -- object and method names (or references)
Message-ID: <3ff595e2.67831682@news.iprimus.ca>

Greetings everyone,

I'm including code, for cut/paste, to better explain my question. I create a Car object then I call some of its methods. No problem. Then I try to pass, to a function, the name of the Car object and the name of one of its methods. I found one way to get this to work but can someone show me a more orthodox way? Is there a way using references to the object and somehow the method?

Python 2.2.2 (#37, Oct 14 2002, 17:02:34) [MSC 32 bit (Intel)] on win32
IDLE 0.8

class Car:
    def __init__(self):
        self.milespergallon=25.0
        self.gas=20
        self.travelled=0
    def drive(self, miles):
        self.travelled=self.travelled+miles
        self.gas=self.gas-(miles/self.milespergallon)


# a test

>>> carObjA=Car() ; carObjA.drive(100) ; print carObjA.gas
16.0

# Next, trying to pass object and method "references", to someFuncA

def someFuncA(objArg1,strArg2):
    print carObjB.strMethB

>>> carObjB=carObjA ; strMethB="gas" ; someFuncA(carObjB,strMethB)
Traceback (most recent call last):
  File "<pyshell#16>", line 1, in ?
    someFuncA(carObjB,strMethB)
  File "<pyshell#15>", line 2, in someFuncA
    print carObjB.strMethB
AttributeError: Car instance has no attribute 'strMethB'

# Next, trying to pass object and method "references", to someFuncB

def someFuncB(strArg1,strArg2):
    e = "print " + strArg1 + "." + strArg2
    exec e

>>> strObjB="carObjA" ; strMethB="gas" ; someFuncB(strObjB,strMethB)
16.0

# That worked but is there a more orthodox way to pass these "references"?


From me at privacy.net  Fri Jan 30 04:14:14 2004
From: me at privacy.net (Duncan Booth)
Date: 30 Jan 2004 09:14:14 GMT
Subject: what is the use of weakref?
References: <1jipe1-fqq.ln1@news.slu.edu.ph>
Message-ID: <Xns94805DF3E3E79duncanrcpcouk@127.0.0.1>

"ali" <rmangaliag at slu.edu.ph> wrote in
news:1jipe1-fqq.ln1 at news.slu.edu.ph: 

> i've seen a lot of times in programs but until now i still dont know
> the use of the weakref module... any help will be appreciated...
> thanks... 
> 

Normally in Python an object is never destroyed until you can no longer 
reference it. Occasionally it can be convenient to hold onto an object, but 
not to mind too much if it gets destroyed.

For example, say you had a word processing application with a complex data 
structure for each paragraph style that was used in a document. When 
someone changes the style of an existing paragraph, if it now matches the 
style of another paragraph you want to share the same data structure rather 
than creating a new one. What you could do here would be to make each 
paragraph hold a strong reference to the required data structure, but also 
store a weak value dictionary which maps the description of the paragraph 
style onto the data structures.

With this kind of setup, the entries in the weak value dictionary always 
exactly match the paragraph styles which are in use; as soon as a style is 
no longer used it can be released, but you never need to duplicate the 
complex data structure as a simple dictionary lookup will give you a 
suitable one if it exists.

In short weak references help you to share or reuse data structures while 
still allowing them to be freed automatically when no longer used.


From goodger at python.org  Mon Jan  5 11:10:37 2004
From: goodger at python.org (David Goodger)
Date: Mon, 05 Jan 2004 11:10:37 -0500
Subject: Pyserial question
In-Reply-To: <000d01c3d3a4$db8464d0$17abfa84@Nuvodido>
References: <000d01c3d3a4$db8464d0$17abfa84@Nuvodido>
Message-ID: <3FF98C7D.1000708@python.org>

Kelia Nichols wrote:
 > I am using Pyserial to work with a RS232 device.  My question is,
 > how do I write hex to the device or cannot write hex to it pyserial?

What do you mean exactly?  Do you want to write a value in hex to the
RS232 port (e.g. write 26 [decimal] as "1A")?  If so, just use string
formatting:

 >>> "%02X" % 26
'1A'

Or do you want to send a byte for which you know the hex
representation (e.g. send "1A" as ASCII 26)?  If so, use integer
conversion & character value conversion:

 >>> chr(int('1a', 16))
'\x1a'

If it's more complex than that (values larger than 255, etc.), the
"struct" module may help.  Post more details for better help.

-- David Goodger





From miki.tebeka at zoran.com  Mon Jan 19 17:26:53 2004
From: miki.tebeka at zoran.com (Miki Tebeka)
Date: 19 Jan 2004 14:26:53 -0800
Subject: Where to post an article?
References: <4f0a9fdb.0401181356.79a1ec87@posting.google.com>
	<400BEB11.E5572142@engcorp.com>
Message-ID: <4f0a9fdb.0401191426.1a76d195@posting.google.com>

Hello Peter,

> > Can you recommend a site/paper to publish it?
> 
> Is the focus on Python, or on the "rapid" part?  If any agile processes
> were used, maybe test-driven development, you would of course be best off
> posting on the extremeprogramming Yahoo mailing list.
> 
> Else here, as Michael has suggested.
OK. Thanks you both.

Miki


From chris at chrisburkert.de  Sun Jan 18 04:03:16 2004
From: chris at chrisburkert.de (Chris Burkert)
Date: Sun, 18 Jan 2004 10:03:16 +0100
Subject: [Q] Pyython and curses/ncurses/snack/tinter/...
Message-ID: <budi4m$p1b$1@anderson.hrz.tu-chemnitz.de>

Hi

I want to write a little application for the shell with a 
userinterface that is not line based. Think of the UI of mc for 
example. And I want to use Python on different Operating Systems. 
So it should be portable.

Now what would you prefer as UI-library? I'm searching for a 
highlevel library with buttons, text boxes, dialog boxes, 
progress bars, ...

I have heard of:
- curses, ncurses ... low-level
- snack ... wrapper for newt and slang
- tinter

Do you know of any other good library that is widely available?

I have seen a lot of examples for curses and ncurses but not for 
the others.

Snack seems to be only available for Linux and not well documented?!?

thanks for any help!

   Chris Burkert



From jcarlson at nospam.uci.edu  Sun Jan 25 13:42:19 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Sun, 25 Jan 2004 10:42:19 -0800
Subject: xrange not hashable - why not?
In-Reply-To: <mailman.764.1075042048.12720.python-list@python.org>
References: <mailman.764.1075042048.12720.python-list@python.org>
Message-ID: <bv12qb$q0v$1@news.service.uci.edu>

> why is an xrange object not hashable?
> I was trying to do something like:

Could be a hold-over from xrange trying to have all of the features of a 
list returned by range; lists are unhashable because they are mutable.

> comments = {
>     xrange(0, 4): "Few",
>     xrange(4, 10): "Several",
>     xrange(10, 100): "A lot",
>     xrange(100, sys.maxint): "Can't count them"}
> for (k, v) in comments.items():
>     if n in k:
>         commentaar = v
>         break

> It would not be difficult to let xrange have a hash:
> 
>     hash((self.start, self.step, self.stop))

I don't believe anyone ever said it was. *wink*


> Hmm, start, step and stop appear to have disappeared in Python 2.3...

I don't know about that:
Python 2.3.2 (#49, Oct  2 2003, 20:02:00) [MSC v.1200 32 bit (Intel)] on 
win32
Type "help", "copyright", "credits" or "license" for more information.
 >>> help(xrange)
Help on class xrange in module __builtin__:

class xrange(object)
  |  xrange([start,] stop[, step]) -> xrange object


> So, should I use one of the alternatives after all? Or does someone have
> something better to offer?

Honestly it is one of those things that are easily remedied by a 
custom-built class.  Like the below:

class HashableXRange:
     def __init__(self, s1, s2=None, s3=None):
         if s2 is None:
             s1, s2, s3 = 0, s1, 1
         elif s3 is None:
             s3 = 1
         self.start = s1
         self.stop = s2
         self.step = s3
     def __hash__(self):
         return hash((self.start, self.stop, self.step))
     def __cmp__(self, other):
         if isinstance(other, self.__class__):
             return cmp(self.start, other.start) or\
                    cmp(self.stop, other.stop) or\
                    -cmp(self.step, other.step)
         return cmp(self.start, other)
     def __iter__(self):
         return iter(xrange(self.start, self.stop, self.step))
     def __contains__(self, object):
         if self.start <= object < self.stop:
             if (object-self.start) % self.step == 0:
                 return 1
         return 0

I included the __cmp__ function in order to give it a richer set of 
behavior.  One thing to note about hashes is that they are not required 
to be unique.  As such, the hashing algorithm is not the absolute best 
algorithm ever.  It is pretty good, but it is not guaranteed that 
hash((a,b,c)) != hash((d,e,f)) for different sets of three objects. 
Better to be safe than sorry.

I would have subclassed xrange, but Python 2.3 doesn't like that. 
Apparently there is no subclassing for xranges.

  - Josiah


From ashleylloyd at hotmail.com  Wed Jan  7 15:03:22 2004
From: ashleylloyd at hotmail.com (Ashley)
Date: Wed, 7 Jan 2004 20:03:22 -0000
Subject: Newbie question
References: <OFWKb.9410$C05.8087@news-binary.blueyonder.co.uk>
Message-ID: <BAY99-DAV10gs0RthS200003e1b@hotmail.com>

You will no doubt get many better replies than mine, since I'm very much a
newbie here, but here goes:

With many programming languages, you are correct - you write the code, and
compile it, which gives you an executable which you can then run
independently.

With Python, the language is interpreted, not compiled. Slightly different,
and I don't pretend to know everything about the difference. However, you
will need python installed to run any of the code you write. Then it depends
how the code is written. If you write a module with a mind to it being used
like an executable (this will make more sense when you start coding), then
it pretty much can be used as one. If python is installed properly, and you
double click (assuming you're using Windows) on yourModuleName.py, then
python will try to run it. Python can be downloaded from
http://www.python.org/download/

I know this isn't much, and like I say more people will probably give more
comprehensive answers - and no doubt correct my mistakes, but as a basic
start I hope it helps.

Cheers

Ashley
----- Original Message ----- 
From: "Paul Mcshane" <mcshane7 at blueyonder.co.uk>
Newsgroups: comp.lang.python
To: <python-list at python.org>
Sent: Wednesday, January 07, 2004 4:42 PM
Subject: Newbie question


> I havn't got a clue what I'm doing so don't treat me like I'm stupid even
> though I am compared to all of you. What is the basics to programming, you
> write the code and compile it? I know a few useless web languages so they
> should come in handy on my way. So you need a compiler to compile your
code
> unless you can do it yourself? Once the program is compiled you can run it
> as a normal executable?
>  Any answers are appreciated, I just wanna get to know what I'm doing
before
> I start to learn anything.
>  Thanks again,
>              Paul Mc.
>
>
> -- 
> http://mail.python.org/mailman/listinfo/python-list
>



From sulfugor at rocketmail.com  Sun Jan 11 11:12:47 2004
From: sulfugor at rocketmail.com (H.V)
Date: 11 Jan 2004 08:12:47 -0800
Subject: solving a small programm
References: <40004254$0$16669$ba620e4c@news.skynet.be>
Message-ID: <279b566d.0401110812.ea53a45@posting.google.com>

"broebel" <computer.problemen at skynet.be> wrote in message news:<40004254$0$16669$ba620e4c at news.skynet.be>...
> hey,
> 
> for the real programmers amongst you, this may be really annoying but I've
> been learning the language for only two days.
> 
> this is my problem,
> in this programm,which already works I now have to make a total count of how
> many coins are used.
> this program gives the total per coin. It should be a small peace of code
> (as explained in a tutorial i read, without the answer.)that counts the
> total of all the coins.
> I ve been searching for two days and for this kind of programm it really
> seems kind of long.
> 
> thanks in advance
> 
> # Een bedrag gepast betalen met zo min mogelijk euromunten
> 
> bedrag = input ( 'Geef bedrag tussen 0 en 500 eurocent: ' )
> 
> for munt in 200, 100, 50, 20, 10, 5, 2, 1 :
>     aantal = 0
> 
>     while bedrag >= munt :
>         aantal = aantal + 1
>         bedrag = bedrag - munt
> 
>     if aantal > 0 :
>         print aantal, 'x', munt
> 
> what i need is:
> for example
> the programm gives
> 68= 50*1
>        10*1
>        5*1
>        2*1
>        1*1
> I need an additional code to get the "5" total of all the coins together.
--
An alternative to keeping track of coins as you go would be to store
your results in some kind of data structure : use a dict whose keys
are the coin type and whose values ate the number of each type of coin
needed. Then you can just add all the "values" . I like the data
centric approach . Your code doesn't seem to exploit any of the
convenient data structures at all .

sulf


From gandalf at geochemsource.com  Wed Jan  7 05:11:15 2004
From: gandalf at geochemsource.com (Gandalf)
Date: Wed, 07 Jan 2004 11:11:15 +0100
Subject: Windows service in Python
Message-ID: <3FFBDB43.9040703@geochemsource.com>


Can anybody tell me how to write a windows service in Python? I would 
only use file operations (maybe the logger module) and TCP/IP.
I already have my server and it runs fine both on Windows, Linux and 
FreeBSD maybe others too, who knows? :-) The only problem is
that it should be a service. It is easy to make it a service on a UNIX 
machine but I need to run as a Windows service on NT/2000/XP.
Is this possible? Can you show me a link to an example? Any help 
appreciated.

Thanks in advance,

   Laci 1.0




From godoy at ieee.org  Fri Jan 16 06:35:53 2004
From: godoy at ieee.org (Jorge Godoy)
Date: Fri, 16 Jan 2004 09:35:53 -0200
Subject: wxPython worries
References: <mailman.352.1074092092.12720.python-list@python.org>
	<92c59a2c.0401152257.5b93167b@posting.google.com>
Message-ID: <qtukd1-jb4.ln1@wintermute.g2ctech>

On Friday 16 January 2004 04:57 MetalOne wrote in
<92c59a2c.0401152257.5b93167b at posting.google.com>:

> I also suppose I shouldn't rant to much about something that is
> free. However my first two GUIs hit critical problems, and  
> these were really simple GUIs.  Granted, the first problem has been
> fixed now, and I have not yet written a bug report on the second.

I think that ranting is good *IF* it has a bug report to the
developers to back it up. 

Developers can't imagine all the uses people will do from their work
and they need to know what happened when you tried doing something so
that they can help you: fixing the problem, pointing another way of
doing it or even saying that it can't be done and making you stop
loosing your time trying to figure out what you can do :-)


With regards to the notebooks page, have you seen that there are two
methods: AddPage and InsertPage? With InsertPage you can specify the
position where the page is to be inserted, putting them on the
desired order. But I don't know if you already tried that and it
didn't do what you expected...


Be seeing you,
-- 
Godoy.     <godoy at ieee.org>


From __peter__ at web.de  Tue Jan 27 12:56:13 2004
From: __peter__ at web.de (Peter Otten)
Date: Tue, 27 Jan 2004 18:56:13 +0100
Subject: Problem with RE matching backslash
References: <7b5e60b8754ab5afcea58d4ecc8b8849@news.meganetnews.com>
	<bv60fk$lu8$05$1@news.t-online.com>
	<9114f8b2d460bc916150d0ae96a69ea7@news.meganetnews.com>
	<mailman.869.1075221434.12720.python-list@python.org>
Message-ID: <bv68iv$vk1$05$1@news.t-online.com>

Jeff Epler wrote:

>> What is still not clear to me is why  the search examples work and yield
>> 'm'.
> 
> Because the first pattern, which you wrote as "\\m", will match a lone
> 'm'.  So 'match' fails, because m is not in the first position.  But
> 'search' succeeds at index 1.
> 
> Jeff

This was my first guess, but it took me a while do find it documented. 
I will reproduce the tiny relevant paragraph from 

http://www.python.org/doc/current/lib/re-syntax.html

"The special sequences consist of "\" and a character from the list below.
If the ordinary character is not on the list, then the resulting RE will
match the second character. For example, \$ matches the character "$". "
[description of characters with special meaning omitted]

I don't know if this list of characters is likely to grow, but I would
definitely prefer a "bogus escape" exception:

>>> re.compile("\\m")
<_sre.SRE_Pattern object at 0x40289660>

versus

>>> re.compile("\\1")
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "/usr/local/lib/python2.3/sre.py", line 179, in compile
    return _compile(pattern, flags)
  File "/usr/local/lib/python2.3/sre.py", line 229, in _compile
    raise error, v # invalid expression
sre_constants.error: bogus escape: '\\1'


Peter


From Pieter.Claerhout at Creo.com  Wed Jan 28 04:22:00 2004
From: Pieter.Claerhout at Creo.com (Pieter Claerhout)
Date: Wed, 28 Jan 2004 10:22:00 +0100
Subject: Cross Platform Browser Launcher
Message-ID: <490316A24CC5D411ACD700B0D078F7F003915E28@cseexch01.cse.creoscitex.com>

Take a look at the webbrowser module...
http://www.python.org/doc/current/lib/module-webbrowser.html

Cheers,


pieter

Creo
pieter claerhout | product support prinergy | tel: +32 2 352 2511 |
pieter.claerhout at creo.com | www.creo.com

IMAGINE CREATE BELIEVE(tm)


-----Original Message-----
From: michael at foord.net [mailto:michael at foord.net] 
Sent: 28 January 2004 10:18
To: python-list at python.org
Subject: Cross Platform Browser Launcher


I've written a simple application in python with an HTML help file.

I'm looking for a cross platform way of launching the help file.

On windows I'd use :
os.system('start help.html')

Which automatically opens the file with the users browser.

Is there a cross-platform way of doing the same thing ? 
I can do a platform test and use different techniques for different
systems - but I don't know how to achieve the same effect on a Linux
(Unix ? Mac ?) machine.....

Any help appreciated.

Fuzzy

--


http://www.Voidspace.org.uk The Place where headspace meets
cyberspace. Online resource site - covering science, technology,
computing, cyberpunk, psychology, spirituality, fiction and more.

--- 

http://www.voidspace.org.uk/atlantibots/pythonutils.html
Python functions - home of dateutils, ConfigObj, StandOut, CGI-News
and more....

--

Everyone has talent. What is rare is the courage to follow talent
to the dark place where it leads. -Erica Jong
Ambition is a poor excuse for not having sense enough to be lazy.
        -Milan Kundera
-- 
http://mail.python.org/mailman/listinfo/python-list



From jjl at pobox.com  Sat Jan 10 19:50:49 2004
From: jjl at pobox.com (John J. Lee)
Date: 11 Jan 2004 00:50:49 +0000
Subject: Databases: Which one's right for me?
References: <4378fa6f.0401091717.1ae63541@posting.google.com>
	<qu7000dot866j3qd9hi6hgkh4np5nuq7fa@4ax.com>
Message-ID: <878ykf71g6.fsf@pobox.com>

Rene Pijlman <reply.in.the.newsgroup at my.address.is.invalid> writes:

> Marc:
> >Basically I need a db that will travel with my executable script and
> >faithfully store and edit the data needed in that script.
> 
> Have a look at ZODB.
> 
> Introduction:
> http://www.python.org/workshops/2000-01/proceedings/papers/fulton/zodb3.html

Which doesn't have a built-in query system, so isn't a database in the
same way as a relational DB like Postgres or Oracle.  It's more like
BSDDB + pickle.


John


From michael at foord.net  Wed Jan  7 03:44:16 2004
From: michael at foord.net (Fuzzyman)
Date: 7 Jan 2004 00:44:16 -0800
Subject: Python Utils - A simple config file parser and output object
Message-ID: <8089854e.0401070044.1e8116ad@posting.google.com>

A couple of little scripts I've written for my python project
(AAAcontroller - see www.atlantibots.org.uk) might be useful to others
- so I've stuck them up on the web :

http://www.voidspace.org.uk/atlantibots/pythonutils.html

They're my new config object - ConfigObj - and my output object
StandOut.......

ConfigObj parses and updates simple config files (including multiple
values for keywords, preserving comments, and updating sections of the
file).
StandOut is an output object that can print messages to the screen
*and* to a logfile.....


Fuzzy

-- 

http://www.Voidspace.org.uk 
The Place where headspace meets cyberspace. Online resource site -
covering science, technology, computing, cyberpunk, psychology,
spirituality, fiction and more.

---
http://www.atlantibots.org.uk
http://groups.yahoo.com/group/atlantis_talk/
Atlantibots - stomping across the worlds of Atlantis.
---
http://www.fuchsiashockz.co.uk   
http://groups.yahoo.com/group/void-shockz
---

Everyone has talent. What is rare is the courage to follow talent
 to the dark place where it leads. -Erica Jong
Ambition is a poor excuse for not having sense enough to be lazy.
         -Milan Kundera


From kenfar42 at yahoo.com  Sat Jan  3 19:14:43 2004
From: kenfar42 at yahoo.com (Ken)
Date: 3 Jan 2004 16:14:43 -0800
Subject: Python Job Market
References: <pan.2003.12.31.09.55.52.222383@yahoo.com>
	<mailman.73.1072889256.8134.python-list@python.org>
	<pan.2004.01.01.02.57.59.651834@yahoo.com>
Message-ID: <ea65eb54.0401031614.49eaaa3c@posting.google.com>

Samuel Walters <swalters_usenet at yahoo.com> wrote in message news:<pan.2004.01.01.02.57.59.651834 at yahoo.com>...

> You know.  I never thought about this before.  Maybe I could find a niche
> reformatting old cobol records and systems.  Is there any demand for that
> sort of thing? 

Sure - though conversion of batch mainframe applications involves
considerable more complexity than just being able to read COBOL
copybooks.

Perhaps there's more work in data conversion. I've been using python
successfully on data warehouse ETL (extract, transform, load) projects
for a couple of years now.  Best practices are to use a commercial
product for this - but you can easily get hung up in procurement,
training, feasibility studies, approvals, etc - that many projects end
up being implemented in perl instead.  These applications tend to be
maintenance-intensive, are often developed iteratively, have a heavy
focus on data quality, and should be accessible to a wide range of IT
personnel - python is a natural fit.

Anyhow, my current etl project is about 5% korn shell and 95% python
and is processing about 10 million rows/day - and is expected to have
to scale to 300 million rows/day by the end of 2004.  This load will
require some optimizations but can be achieved with the hardware at
hand based on current performance figures.  Note that python wasn't on
the list of approved solutions in this organization, but I was allowed
to use it - since I was doing much of the work in my own time - and
presented the option of an eventual path to Java (via jython).  Now
most of the team is firmly behind it - they've seen how low the
learning curve has been, and how fast it has been to develop with.

ken


From jeffplus at comcast.net  Sat Jan  3 11:05:54 2004
From: jeffplus at comcast.net (Jeff Schwab)
Date: Sat, 03 Jan 2004 11:05:54 -0500
Subject: Text-to-HTML processing program
In-Reply-To: <slrnbvcm32.122.philh@cabalamat.cabalamat.org>
References: <slrnbvcm32.122.philh@cabalamat.cabalamat.org>
Message-ID: <JZqdnSmWjK7nd2uiRVn-hg@comcast.com>

phil hunt wrote:
> Does anyone know of a text-to-HTML processing program, ideally
> written in Python because I'll probably be wanting to make small
> modifications to it, which is simple and straightforward to use
> and which uses a simple markup language (something like Wikipedia
> markup would be ideal)?

How about troff?  Or if you really want to keep it simple, why not use 
the <pre> tag in HTML?




From alessandro at sephiroth.it  Mon Jan 12 17:58:12 2004
From: alessandro at sephiroth.it (Alessandro Crugnola *sephiroth*)
Date: Mon, 12 Jan 2004 22:58:12 GMT
Subject: dde
Message-ID: <8EFMb.102403$_P.3808599@news4.tin.it>

Hi all
I would like to send dde messages to an application, but i don't know which messages it supports.
Is possible to do in some way or I absolutely need the api specifications?

ps. i can't find any documentation about dde module. is there a link?

tnks in advance
Alessandro




From teengo at yahoo.com  Mon Jan 12 12:50:38 2004
From: teengo at yahoo.com (Ticachua)
Date: 12 Jan 2004 09:50:38 -0800
Subject: How to intercept a keypress using python?
Message-ID: <ae453155.0401120950.39f16df8@posting.google.com>

Hello all,

Does anyone know how to intercept user's keypress or mouseclick in Python?
I'd like to write a small tool (Python-based preferrably) running on
Windows to capture the user's keypresses and mouseclicks and write 
them to a file.

Thanks for your help.


From marco at bubke.de  Thu Jan 15 12:56:25 2004
From: marco at bubke.de (Marco Bubke)
Date: Thu, 15 Jan 2004 18:56:25 +0100
Subject: QT usage confusion
References: <40069912$0$251$4d4ebb8e@news.nl.uu.net>
Message-ID: <bu6k89$bav$1@graf.cs.uni-magdeburg.de>

Guyon Mor?e wrote:

> hmmm, all this time that I am fooling around with python I never took a
> good look at (py)QT.
> I want to have a go at it, after being a bit disapointed about the
> alternatives.
> 
> I have read multiple docs about it and searched this newsgroup I came to
> the conclusion that, as I am a windows user, I have only 2 options:
> 
> - buy a commercial qt license
> - try it out for 30 days (!)
> 
> that sucks ;)
> 
> am I wrong?
> please tell me I'm wrong.

There is a new Book(look at www.trolltech.com) with the Qt 3.2.1 Windows
non-commerial Version.

Marco


From michael at foord.net  Thu Jan 29 03:12:41 2004
From: michael at foord.net (Fuzzyman)
Date: 29 Jan 2004 00:12:41 -0800
Subject: Webhosting with Python
References: <8089854e.0401280834.6fd4f972@posting.google.com>
	<bv8pch$2lhu$1@bigboote.WPI.EDU>
Message-ID: <8089854e.0401290012.465ba364@posting.google.com>

> On 2004-01-28 11:34:43 -0500, michael at foord.net (Fuzzyman) said:
> 
> > I've recently starting using a very cheap web hoster who has python
> > 2.2 installed.... almost free hosting (but not quite).....
> > 
> > Thought some of you guys might be interested..........
> > 
> > http://www.xennos.com
> > 
> > Fuzzyman
> 
> How do you plan to make money off of this?

I don't intend to make any money off it...... it's not my hosting firm
- but I know how long it took me to find cheap hosting with Python -
so I thought others might be interested.

Fuzzy


From cygnus at cprogrammer.org  Mon Jan 26 15:32:15 2004
From: cygnus at cprogrammer.org (Jonathan Daugherty)
Date: Mon, 26 Jan 2004 15:32:15 -0500
Subject: wxPython: images from URLs
Message-ID: <20040126203215.GA4742@mail.theserver.ath.cx>

Does anyone here know if the wxImage class in wxPython supports dislaying
images from URLs?

-- 

  Jonathan Daugherty
  http://www.cprogrammer.org

  "It's a book about a Spanish guy called Manual, you should read it."
                                                            -- Dilbert



From jjl at pobox.com  Fri Jan  2 18:19:22 2004
From: jjl at pobox.com (John J. Lee)
Date: 02 Jan 2004 23:19:22 +0000
Subject: Can this be reversed (Tkinter)?
References: <mailman.30.1073076631.12720.python-list@python.org>
Message-ID: <87znd6j5vp.fsf@pobox.com>

"mark" <mark at diversiform.com> writes:

> I am looking at the format used by root.geometry().  The string returned
> from root.geometry() is "%dx%d+%d+%d".  Is there a quick and painless
> way to extract the values from that string (i.e., "100x150+25+25" =>
> (100,150,25,25))?

def geometry_tuple_from_string(text):
    a, rest = text.split("x")
    b, c, d = rest.split("+")
    return tuple([int(x) for x in (a, b, c, d)])

print geometry_tuple_from_string("100x150+25+25")


John


From mtadin66 at yahoo.com  Sun Jan 18 23:46:36 2004
From: mtadin66 at yahoo.com (Marijan Tadin)
Date: Mon, 19 Jan 2004 05:46:36 +0100
Subject: Searching for UTF8 capable font for REPORTLAB
References: <mailman.429.1074256100.12720.python-list@python.org>
Message-ID: <bufqk0$3e8$2@ls219.htnet.hr>

Try following code, replace value of my_location_of_TTF with your
location of TTF (of course you should have TT fonts somewhere on your
machine, on windows they are allways there, AFAIK you can download them
for linux):

There is also mailing list on ReportLabs website, it is where I found
the hint how to use ReportLab and Unicode.


from reportlab.pdfgen import canvas
from reportlab.pdfbase import pdfmetrics
from reportlab.pdfbase.ttfonts import TTFont

canv = canvas.Canvas('test_03.pdf')
fontname = 'CS'

my_location_of_TTF = 'C:\WINNT\FONTS\comic.TTF'

pdfmetrics.registerFont(TTFont(fontname,my_location_of_TTF))
a=u'\u010d\u0107\u017e\u0161\u0111\u010c\u0106\u017d\u0160\u0110'
canv.setFont(fontname,10)
canv.drawString(50,100,'Some text:'+a.encode('UTF8'))
canv.save()


"Andreas Jung" <lists at andreas-jung.com> wrote in message
news:mailman.429.1074256100.12720.python-list at python.org...
> Reportlab has some problems with creating PDFs from UTF8 encoded text.
For
> this reason
> they are using a truetype font rina.ttf which looks *very ugly*. Does
> anyone know of a
> suitable free available truetype font that works with UTF8?
>
> -aj
>
>



From jepler at unpythonic.net  Mon Jan 12 11:24:23 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Mon, 12 Jan 2004 10:24:23 -0600
Subject: Python is far from a top performer according to benchmark
	test...
In-Reply-To: <6ee58e07.0401120542.5d79090d@posting.google.com>
References: <ryELb.238$tK2.228@amstwist00> <btn5db$2f8$1@absinth.dialog.net.pl>
	<pan.2004.01.09.21.35.40.132608@yahoo.com>
	<6ee58e07.0401092129.302cb9d4@posting.google.com>
	<pan.2004.01.11.06.08.18.867825@yahoo.com>
	<6ee58e07.0401120542.5d79090d@posting.google.com>
Message-ID: <20040112162422.GF2810@unpythonic.net>

On Mon, Jan 12, 2004 at 05:42:22AM -0800, Lothar Scholz wrote:
> Python for hardcore numerics, even with PyNumerics, is simply a very
> bad solution.

I think that many of us are not in a situation where we have to make our
program run fast enough to save a million on a supercomputer, but where
we have to make our program run soon enough to save a few thousands or
maybe tens of thousands on programmer time.

ObLink: http://cens.ioc.ee/projects/f2py2e/

Jeff



From virus.manager at st.com  Wed Jan 28 05:16:34 2004
From: virus.manager at st.com (virus.manager at st.com)
Date: Wed, 28 Jan 2004 10:16:34 -0000
Subject: Virus Alert
Message-ID: <20040128101634.B42AFF380@zeta.dmz-eu.st.com>

The mail message (file: body.pif) you sent to <maria at installshield.com> contains a virus. (on zeta)



From fuf at mageo.cz  Wed Jan 28 12:16:02 2004
From: fuf at mageo.cz (Michal Vitecek)
Date: Wed, 28 Jan 2004 18:16:02 +0100
Subject: isinstance() bug
In-Reply-To: <bv8ok3$539$03$1@news.t-online.com>
References: <20040128132225.GA10842@foof.i3.cz>
	<16407.54576.283608.505067@montanaro.dyndns.org>
	<mailman.925.1075304492.12720.python-list@python.org>
	<bv8ok3$539$03$1@news.t-online.com>
Message-ID: <20040128171602.GC11485@foof.i3.cz>

Peter Otten wrote:
>Which reminds me - why do you want to put a package directory into your
>python path in the first place?. Before spending to much effort on fixing
>the problems that this practice entails, what are the benefits?

 i never said i wanted to do it - and i don't do it. it's just i've come
 across this buggy behaviour and thought to ask/report it for other
 thoughts on the issue.

-- 
		fuf		(fuf at mageo.cz)



From cpl.19.ghum at spamgourmet.com  Thu Jan  1 15:58:55 2004
From: cpl.19.ghum at spamgourmet.com (Harald Massa)
Date: Thu, 1 Jan 2004 21:58:55 +0100
Subject: Quote of an Imam
Message-ID: <Xns9463E0D61D05Ecpl19ghumspamgourmet@62.153.159.134>


"""Many packages are also coded in obscure languages such as Mod Perl, 
Python and Tcl. 'A lot of them have been around for a long time and have 
been put together by the kind of webmasters at which they were aimed, so 
they tend to use languages which theorists think are good languages, but 
you don't get many skills in the market - it's not .NET or Java,' says 
Hoque."""

http://www.itconsultantmagazine.com/magazine/index.cfm?
fuseaction=article&ArticleID=411


I don't know what I dislike more: calling Python "obscure", that he talkes 
about "theorists ...." or that he lines up Python with Perl and Tcl.

But I got most upset when I was reading "theorists" as "terrorists" :)))))

Harald


From jl at windsmith.net  Sun Jan 11 02:48:09 2004
From: jl at windsmith.net (John Lull)
Date: 11 Jan 2004 01:48:09 -0600
Subject: Multithreaded COM server problem...
References: <5a90009ufdd66okc8osajrn1a5kokp86mk@4ax.com>
	<btpug4$1oag$1@arachne.labyrinth.net.au>
Message-ID: <gdv100hgp4tgnclf0c4a4nlr58npi5q3ir@4ax.com>

Mark Hammond <mhammond at skippinet.com.au> wrote (with possible deletions):

> John Lull wrote:
> 
> > I'm writing a multithreaded COM server to manage a pool of hardware resources.
> > All objects are designed to be thread-safe, and I've set sys.coinit_flags to
> > COINIT_MULTITHREADED before importing pythoncom.
> 
> Note that this flag is effeectively ignored for the server.  Objects are 
> created in the same "apartment" as their creator.  This, the code 
> implementing your object need not specify this, but the code *creating* 
> the object must.  This is what determines the appartment.
> 
> COM threading rules are complex, but "Python Programming on Win32" (1/2 
> by me :) covers these rules in words I would have trouble finding again :)

It covers threading rules for in-process servers pretty thoroughly.

Unfortunately, this one has to be a local server since it's providing shared
access to a pool of hardware devices from multiple distributed clients. I've
carefully reviewed chapters 5 & 12, and appendix D, and wasn't able to find
anything addressing threading models in the local server in detail. If I've
missed something, I'd be grateful for any additional hints. 

Thanks.


Regards,
John



From sross at connectmail.carleton.ca  Thu Jan  1 21:45:01 2004
From: sross at connectmail.carleton.ca (Sean Ross)
Date: Thu, 1 Jan 2004 21:45:01 -0500
Subject: finding file size
Message-ID: <4V4Jb.12709$Vl6.2811218@news20.bellglobal.com>

Hi.

Recently I made a small script to do some file transferring (among other
things). I wanted to monitor the progress of the file transfer, so I needed
to know the size of the files I was transferring.  Finding out how to get
this information took some time (reading the manuals - googling did not
prove worthwhile). Anyway, I did eventually figure out how to do it (there
are a few ways, including os.path.getsize(filename)).

My question is this: Is there a reason why file objects could not have a
size method or property? So that you could then just ask the file how big it
is using fd.size or fd.size(). I'm just curious, because, well, it seems to
have obvious utility, and the way to find it is less than obvious (at least,
it was to me).

Thanks,
Sean




From daniel.dittmar at sap.com  Mon Jan 19 05:49:19 2004
From: daniel.dittmar at sap.com (Daniel Dittmar)
Date: Mon, 19 Jan 2004 11:49:19 +0100
Subject: Analysing Word documents (slow) What's wrong with this code
	please!
References: <3d06fae9.0401161351.75e7f5a@posting.google.com>
Message-ID: <bugcnf$d5r$1@news1.wdf.sap-ag.de>

jmdeschamps wrote:
> Anyone has a hint how else to get faster results?
> (This is to find out what was bold in the document, in order to grab
> documents ptoduced in word and generate html (web pages) and xml
> (straight data) versions)
[...]
> for i in range(len(MSWord.Documents[0].Content.Text)):
>     if MSWord.Documents[0].Range(i,i+1).Bold  : # testing for bold

Perhaps you can search for bold text. The Word search dialog allows this.
And when you use the keybord macro recording feature of Word, you can
probably figure out how to use that search feature from Python.

Daniel





From xpythonist at yahoo.com.br  Mon Jan 19 07:43:01 2004
From: xpythonist at yahoo.com.br (=?iso-8859-1?q?Aloysio=20Figueiredo?=)
Date: Mon, 19 Jan 2004 09:43:01 -0300 (ART)
Subject: Escaping slashes (double backslash plague)
Message-ID: <20040119124301.6247.qmail@web21501.mail.yahoo.com>

I need to replace every ocurrence of '/' in s by '\/'
in order to create a file named s. My first attempt
was:

s = '\/'.join(s.split('/'))

but it doesn't work:

>>> s = 'a/b'
>>> s = '\/'.join(s.split('/'))
>>> s
'a\\/b'
>>> repr(s)
"'a\\\\/b'"
>>>

'\/'.join() escapes the backslashes and I don't know
why. 

Any help?

Aloysio Figueiredo

______________________________________________________________________

Yahoo! GeoCities: a maneira mais f?cil de criar seu web site gr?tis!
http://br.geocities.yahoo.com/



From mhammond at skippinet.com.au  Sat Jan 10 17:17:28 2004
From: mhammond at skippinet.com.au (Mark Hammond)
Date: Sun, 11 Jan 2004 09:17:28 +1100
Subject: Communicating with MSVC++ via COM: how?
In-Reply-To: <btjkb8$som$1@news-reader4.wanadoo.fr>
References: <btjkb8$som$1@news-reader4.wanadoo.fr>
Message-ID: <btptls$1n35$1@arachne.labyrinth.net.au>

Eric Brunel wrote:
> This script doesn't work: the call to docs.CloseAll fails with the error:
> 
> Traceback (most recent call last):
>   File "test.py", line 13, in ?
>     docs.CloseAll()
> TypeError: object of type 'int' is not callable

This is because docs.CloseAll is making the call, and returning an int. 
  This, docs.CloseAll() is attempting to call that int.

It looks very much like you have no makepy support for MSVC built.

Just after the line:
app = win32com.client.Dispatch('MSDev.Application')
Try adding:
app = win32com.client.gencache.EnsureDispatch(app)

That should force makepy, and everything should start working.

Mark



From sombDELETE at pobox.ru  Sat Jan  3 18:13:07 2004
From: sombDELETE at pobox.ru (Serge Orlov)
Date: Sun, 4 Jan 2004 02:13:07 +0300
Subject: Creating a capabilities-based restricted execution system
References: <LmmdnUn4seDeGWuiXTWc-w@speakeasy.net> <bt788l$1pej$1@nadya.doma>
	<d7ycncKp5rket2qiXTWc-g@speakeasy.net>
Message-ID: <bt7i9i$236v$1@nadya.doma>


"Sean R. Lynch" <seanl at chaosring.org> wrote in message news:d7ycncKp5rket2qiXTWc-g at speakeasy.net...
> Serge Orlov wrote:
> > "Sean R. Lynch" <seanl at chaosring.org> wrote in message news:LmmdnUn4seDeGWuiXTWc-w at speakeasy.net...
> >>To create private attributes, I'm using "name mangling," where names
> >>beginning with X_ within a class definition get changed to
> >>_<uuid>_<name>, where the UUID is the same for that class. The UUIDs
> >>don't need to be secure because it's not actually possible to create
> >>your own name starting with an underscore in RestrictedPython; they just
> >>need to be unique across all compiler invocations.
> >
> >
> > This is a problem: you declare private attributes whereas you should be
> > declaring public attributes and consider all other attributes private. Otherwise
> > you don't help prevent leakage. What about doing it this way:
> >
> > obj.attr means xgetattr(obj,acc_tuple) where acc_tuple = ('attr',UUID)
> > and xgetattr is
> > def xgetattr(obj,acc_tuple):
> >   if not has_key(obj.__accdict__,acc_tuple):
> >     raise AccessException
> >   return getattr(obj,acc_tuple[0])
> >
> > __accdict__ is populated at the time class or its subclasses are created.
> > If an object without __accdict__ is passed to untrusted code it will
> > just fail. If new attributes are introduced but not declared in __accdict__
> > they are also unreachable by default.
>
> This is very interesting, and you may convince me to use something
> similar, but I don't think you're quite correct in saying that the
> name-mangling scheme declares private attributes; what is the difference
> between saying "not having X_ in front of the attribute makes it public"
> and "having X_ in front of the attribute makes it private?"

You're right, the wording is not quite correct. My point was that it should
take effort to make attributes _public_, for example, going to another
source line and typing attribute name or doing whatever "declaration" means.
This way adding new attribute or leaking "unsecured" object will
raise an exception when untrusted code will try to access it. Otherwise
one day something similar to rexec failure will happen: somebody
added __class__ and __subclasses__ attributes and rexec blindly
allowed to access them. The leading underscore doesn't matter, it
could be name like encode/decode that is troublesome.

By the way, my code above is buggy, it's a good idea that you're
not going to use it :) Let me try it the second time in English words:
If the attribute 'attr' is declared public give it. If the function with
UUID has access to attribute 'attr' on object 'obj' give it. Otherwise fail.


>
> I am not (particularly) concerned about DoS because I don't plan to be
> running anonymous code and having to restart the server isn't that big
> of a deal. I do plan to make it hard to accidentally DoS the server, but
> I'm not going to sacrifice a bunch of performance for that purpose. As
> for covert channels, can you give me an example of what to look for?

Nevermind, it's just a scary word :) It can concern you if you worry
about information leaking from one security domain to another. Like
prisoners knocking the wall to pass information between them. In
computers it may look like two plugins, one is processing credit
cards and the other one has capability to make network connections.
If they are written by one evil programmer the first one can "knock
the wall" to pass the information to the second. "knocking the wall"
can be encoded like quick memory allocation up to failure = 1, no
quick memory allocation = 0. Add error correction and check summing
and you've got a reliable leak channel.

>
> I am certainly worried about non-obvious things, but my intent wasn't to
> put up a straw man, because if I ask if I'm missing non-obvious things,
> the only possible answer is "of course."
>
> > By the way, did you think about str.encode? Or you are not worried about
> > bugs in zlib too?
>
> Well, it'll only take *one* problem of that nature to force me to go
> back to converting all attribute accesses to function calls. On the
> other hand, as long as any problem that allows a user to access
> protected data is actually a in (zlib, etc), I think I'm not going to
> worry about it too much yet. If there is some method somewhere that will
> allow a user access to protected data that is not considered a bug in
> that particular subsystem, then I have to fix it in my scheme, which
> would probably require going back to converting attribute access to
> method calls.

I'm not sure how to deal with str.encode too. You don't know what
kind of codecs are registered for that method for sure, one day there
could be registered an unknown codec that does something unknown.
Shouldn't you have two (or several) codecs.py modules(instances?)
for trusted and untrusted code? And str.encode should be transparently
redirected to the proper one?

-- Serge.




From DSAVDATALEX_NT001 at datalex.ie  Fri Jan 30 13:57:57 2004
From: DSAVDATALEX_NT001 at datalex.ie (DSAVDATALEX_NT001(Network Associates Anti-Virus - Mailbox Agent))
Date: Fri, 30 Jan 2004 18:57:57 -0000
Subject: ALERT - Virus W32/Mydoom.a@MM found; an attachment/message has be
	en quarantined
Message-ID: <111302C972D7D01185A00060977D7D4105F29094@DATALEX_NT>

Action Taken:
An attempt to disinfect the attachment was unsuccessful,
so the attachment was quarantined from the message and replaced with
a text file informing the recipient of the action taken. The infected
attachment
has been placed in the designated quarantine folder.
Please exercise extreme caution when handling the quarantined attachment

To:
dave at datalex.ie

From:
python-list at python.org

Sent:
-115776512,29615970

Subject:
Hi

Attachment Details:-

Attachment Name: doc.zip
File: doc.zip
Infected? Yes
Repaired? No
Virus Name: W32/Mydoom.a at MM



	
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From tmartinez at ammsoft.com  Mon Jan 26 15:51:46 2004
From: tmartinez at ammsoft.com (Ya)
Date: Mon, 26 Jan 2004 21:51:46 +0100
Subject: wxpython and wxlocale
Message-ID: <bv3ur6$bm1$1@news.ya.com>

Problem:
In a computer it is wanted to install an application that must show
information in different languages.
Thanks to the module we, gettext, have been able to implement that the texts
that are shown are translated.
The user selects the language and act from a file .mo every language.
The problem are the messages and dialogues since it shows the buttons in the
language of the operating system by default.
Is there any way of telling python that the text of the dialogues is in a
specific language?
And in affirmative case. How is it made? since all the attempts have been
useless.
I think that wxLocale has to be used, but I do not become clear.

We are using Python 2.3.3 and wxpython 2.4.2.4 in W2K.

Greetings.





From davidb at mcs.st-and.ac.uk  Thu Jan  8 16:18:09 2004
From: davidb at mcs.st-and.ac.uk (David Boddie)
Date: 8 Jan 2004 13:18:09 -0800
Subject: metadocumentation (keyword help)
References: <tyfn091gnk5.fsf@pcepsft001.cern.ch>
	<mailman.144.1073405082.12720.python-list@python.org>
	<3ffb0edf$1@nntp0.pdx.net> <tyfhdz8gn8k.fsf@pcepsft001.cern.ch>
	<d69wnik0.fsf@python.net> <tyfbrpggc6u.fsf@pcepsft001.cern.ch>
Message-ID: <4de76ee2.0401081318.bab6f62@posting.google.com>

Jacek Generowicz <jacek.generowicz at cern.ch> wrote in message news:<tyfbrpggc6u.fsf at pcepsft001.cern.ch>...

> I always wonder whether I should post concise articles, or wordy ones,
> covering all possbile assumpitons and misconceptions.
> 
> It appears that, usually, I get the balance hopelessly wrong :-( Or,
> maybe, that's just what life is like in a large public forum; whatever
> you say, there will always be hundreds of people who misunderstand you.

Let's hope I'm answering your original question.

> Does someone who writes 
> 
> > > GNU/Linux, Mac OS X, and even Windoze
>                              ^^^^    ^^^^
> really look like someone who is looking for instructions on fixing his
> Python installation on a M$ operating system ?

I don't know why you wrote that originally. I can only presume that you
were asking for a general solution because, otherwise, it would appear
that you were asking for assistance which you didn't want. Anyway, it
doesn't really matter.

The quoting gets confusing in your message, so I presume that all of
the following attributable to you:

> The point is
> that I hope that the studens will go away with the ability to find
> most things out for themselves. In this context, I would like them to
> be able to find out for themselves how to fix the keyword
> documentation, which is why I phrased my original question thus:
> 
> > Where can I find concise, clear documentation[*] describing what one
> > has to do in order to enable Python's internal help to be able to
> > provide descriptions of Python keywords ?
> 
> Note, I did NOT say "How do I ...", I said "Where do I find
> [...] documentation ...".

Five minutes with Google failed to reveal any "official" document, if
you don't count mailing list archives. However, five seconds with the
search engine at

    http://www.python.org/search/

revealed that the basic information about the PYTHONDOCS environment
variable can be found at the foot of the following page:

    http://www.python.org/dev/doc/devel/lib/module-pydoc.html

I'm sorry if this isn't good enough for your purposes.

> I am NOT interested in a recipe posted here. I want to know where to
> find the official instructions on how it is done, so that I can show
> newbies how to find the information themselves.
> 
> "Give a man a fish, and he can eat for a day. Teach a man to fish ...",
> and all that.

Well, I learned something from the recipes posted in this thread, even
if it isn't suitable for your purposes.

> If these instructions are, as it seems, absent, then I would
> appreciate advice on what I can do to make them appear in the
> appropriate place, and what the appropriate place might be.

They could always be written up in the PythonInfo Wiki, then at
least you have a python.org URL to give your students.

> I recognize my impatience with poor documentation as a pathological
> flaw in my characer, which is why I am asking for help in
> finding/creating this documentation here.

You're going to have to be quite patient, though. If the documents
you want aren't obvious then it's probably up to you to write them. :-/

David

P.S. You'll note that I haven't come up with my own recipe so far.
For what it's worth, a document describing how to obtain help on
keywords might start in the following way:

Configuring Python to supply help on keywords
=============================================

Introduction
------------
Recent versions of Python include the ability to display help on
existing objects, or to search for information on installed modules,
from within the interactive environment. However, it is also possible
to use the help system to display information on the keywords used
in the language itself, such as "if" and "for. This feature appears
to be less well-known, possibly because users seek basic language
information elsewhere, but maybe also because it is not always
enabled by default.

Requirements
------------
In order to seek help on keywords from within the interactive
environment, two things need to be done before Python is invoked:

 * The HTML documentation needs to be downloaded and installed in an
   accessible location; this will depend on the operating system in
   use.
 
 * The PYTHONDOCS environment variable will need to be set to the
   path of the installed HTML files.

Setting it up
-------------
First of all, check whether the HTML documentation has already been
installed for the version of Python you are using. This could save
you the effort of downloading and installing it manually.

If the documentation is required then go to::

  http://www.python.org/download/

and find the appropriate documentation. Download it and install it
in a place where it can be read by those who will be using it.

Checking it works
-----------------
Using the appropriate method provided by your operating system, set
the PYTHONDOCS environment variable to the directory which contains
the main index file for the documentation.

For example, you may have installed the documentation in
/usr/share/doc/python so that the directory layout look like::

  /usr/share/doc/python
  |- Misc
  |- README
  \- html
     |- about.html
     |- acks.html
     |- api/
     |- dist/
     |- doc/
     ...

and so on. Therefore, PYTHONDOCS should be set to /usr/share/doc/python/html
since this contains the information required. On Linux systems, using the
bash shell, you might type::

  export PYTHONDOCS=/usr/local/share/python/html python

to start the interpreter. Within the Python environment, typing::

  help("if")

should now cause something like the following to be displayed::

  7.1 The if statement
  
    The if statement is used for conditional execution:
    
          if_stmt   ::=    "if" expression[1] ":" suite[2]
                           ( "elif" expression[3] ":" suite[4] )*
                           ["else" ":" suite[5]]
  
    Download entire grammar as text.[6]
  
    It selects exactly one of the suites by evaluating the expressions one
    by one until one is found to be true (see section 5.10[7] for the
    definition of true and false); then that suite is executed (and no other
    part of the if statement is executed or evaluated). If all expressions
    are false, the suite of the else clause, if present, is executed.

Enabling this by default
------------------------
Any ideas?


From amy-g-art at cox.net  Fri Jan 23 17:55:52 2004
From: amy-g-art at cox.net (Amy G)
Date: Fri, 23 Jan 2004 14:55:52 -0800
Subject: Various strings to dates.
References: <4GfQb.16187$AA6.14368@fed1read03>
	<MFgQb.95539$6y6.1915432@bgtnsc05-news.ops.worldnet.att.net>
	<PRgQb.16209$AA6.9881@fed1read03>
	<K4ydna_ey7rvOIzdRVn-jw@comcast.com>
Message-ID: <UDhQb.16218$AA6.2693@fed1read03>

That is exactly what I am looking for.  However I don't have the module
installed.  Where can I get it?

"Michael Spencer" <michael at telcopartners.com> wrote in message
news:K4ydna_ey7rvOIzdRVn-jw at comcast.com...
> "Amy G" <amy-g-art at cox.net> wrote in message
> news:PRgQb.16209$AA6.9881 at fed1read03...
> > No it won't.  Unfortunatly I don't necessarily have a comma delimited
date
> > string.  Thanks for the input though.
> >
> > The following three date strings is another example of the various date
> > formats I will encounter here.
> >
> > Thursday, 22 January 2004 03:15:06
> > Thursday, January 22, 2004, 03:15:06
> > 2004, Thursday, 22 January 03:15:06
> >
> > All of these are essentially the same date... just in various formats.
I
> > would like to parse through them and get a comparable format so that I
can
> > display them in chronological order.
> >
> >
> > "wes weston" <wweston at att.net> wrote in message
> > news:MFgQb.95539$6y6.1915432 at bgtnsc05-news.ops.worldnet.att.net...
> > > Amy,
> > >     I hope there is a better way but, if you go here:
> > >
> > > http://www.python.org/doc/current/lib/datetime-date.html
> > >
> > > The new datetime module may help. This and the time mod
> > > should get you where you want to go.
> > >
> > > list     = strdate.split(", ")
> > > daystr   = list[0]
> > > daynum   = int(list[1])
> > > monthstr = list[2]
> > > year     = int(list[3])
> > > #funct to get a month int is needed
> > >
> > > d = datetime.Date(y,m,d)
> > >
> > > wes
> > >
> > > ---------------------------------------
> > >
> > > Amy G wrote:
> > > > I have seen something about this beofore on this forum, but my
google
> > search
> > > > didn't come up with the answer I am looking for.
> > > >
> > > > I have a list of tuples.  Each tuple is in the following format:
> > > >
> > > > ("data", "moredata", "evenmoredata", "date string")
> > > >
> > > > The date string is my concern.  This is the date stamp from an
email.
> > > > The problem is that I have a whole bunch of variations when it comes
> to
> > the
> > > > format that the date string is in.  For example I could have the
> > following
> > > > two tuples:
> > > >
> > > > ("data", "moredata", "evenmoredata", "Fri, 23 Jan 2004 00:06:15")
> > > > ("data", "moredata", "evenmoredata", "Thursday, 22 January 2004
> > 03:15:06")
> > > >
> > > > I know there is some way to use the date string from each of these
to
> > get a
> > > > date usable by python, but I cannot figure it out.
> > > > I was trying to use time.strptime but have been unsuccesful thus
far.
> > > >
> > > > Any help is appreciated.
> > > >
> > > >
> > >
> >
> >
>
> This was asked and answered earlier today
>
> See: https://moin.conectiva.com.br/DateUtil
>
> >>> from dateutil.parser import parse
> >>> parse("Thursday, 22 January 2004 03:15:06")
> datetime.datetime(2004, 1, 22, 3, 15, 6)
> >>> parse("Thursday, January 22, 2004, 03:15:06")
> datetime.datetime(2004, 1, 22, 3, 15, 6)
> >>> parse("2004, Thursday, 22 January 03:15:06")
> datetime.datetime(2004, 1, 22, 3, 15, 6)
> >>>
>
>
>




From dw-google.com at botanicus.net  Fri Jan 23 18:46:46 2004
From: dw-google.com at botanicus.net (David M. Wilson)
Date: 23 Jan 2004 15:46:46 -0800
Subject: Ordered dictionary?
References: <leWPb.231$af7.162835@newshog.newsread.com>
	<f7XPb.9179$7D.3428@fe2.texas.rr.com>
Message-ID: <99dce321.0401231546.5f73d721@posting.google.com>

"Paul McGuire" <ptmcg at users.sourceforge.net> wrote...

> If you really need to access the dictionary in sorted key order, is this so
> difficult?

That was not the original poster's question. Order is semantic
information which a dictionary does not record or represent in any
way.


David.


From fumanchu at amor.org  Thu Jan 15 19:16:20 2004
From: fumanchu at amor.org (Robert Brewer)
Date: Thu, 15 Jan 2004 16:16:20 -0800
Subject: Redefining __call__ in an instance
Message-ID: <DE1CF2B4FEC4A342BF62B6B2B334601E561C2A@opus.amorhq.net>

Robert Ferrell wrote:
> I'd like to have a factory class that takes a string argument 
> and returns
> the appropriate factory method based on that string.  I'd like the
> instances to be callable.  Like this:
> 
> fact = Factory('SomeThing')
> aSomeThing = fact(some args)
> 
> anotherFact = Factory('SomeThingElse')
> anotherThing = anotherFact(some other args)

Perhaps this will give you some ideas:

>>> class SomeThing(object):
... 	pass
... 
>>> def Factory(classname, *args, **kwargs):
... 	return globals()[classname](*args, **kwargs)
... 
>>> st = Factory('SomeThing')
>>> st
<__main__.SomeThing object at 0x010C0F10>


If you still want to package that into a class instead of a function
(and then override __call__), feel free. Obviously, more exception
checking could be done.


Robert Brewer
MIS
Amor Ministries
fumanchu at amor.org



From irmen at -NOSPAM-REMOVETHIS-xs4all.nl  Sun Jan 25 08:41:26 2004
From: irmen at -NOSPAM-REMOVETHIS-xs4all.nl (Irmen de Jong)
Date: Sun, 25 Jan 2004 14:41:26 +0100
Subject: compress string of data
In-Reply-To: <bv0gev$2ni$1@nsnmrro2-gest.nuria.telefonica-data.net>
References: <bv0gev$2ni$1@nsnmrro2-gest.nuria.telefonica-data.net>
Message-ID: <4013c786$0$325$e4fe514c@news.xs4all.nl>

Jos? Carlos wrote:

> How i could compress string of data?.

Type "python compress string of data" in google and press "I'm feeling lucky".
That might help you out.

--Irmen


From jcribbs at twmi.rr.com  Thu Jan 29 23:21:00 2004
From: jcribbs at twmi.rr.com (Jamey Cribbs)
Date: Fri, 30 Jan 2004 04:21:00 GMT
Subject: Simple Database Package
In-Reply-To: <8089854e.0401280622.4e145267@posting.google.com>
References: <8089854e.0401280622.4e145267@posting.google.com>
Message-ID: <MYkSb.4270$Jf2.1522@fe1.columbus.rr.com>

Fuzzyman wrote:
> Anyone able to reccomend a simple module / package I can use...  ?
> I've never done any database work before and am ken to learn - but
> most of the ones I've seen seem to rely on a database engine buit into
> a server.. I need a simple stand alone engine. Of course I could just
> build the functions I need - but that would be a bit of a waste and
> not so extendable........

Have a look at KirbyBase (http://www.netpromi.com/kirbybase.html).  It's 
written in Python, can be either embedded in your application or used in 
a multi-user/client server mode, and stores its data as plain-text files 
that can be opened by any text editor.  I'm probably a little biased 
because I wrote it, but, if your needs are simple, it might prove useful.

Jamey


From hotrearia at jetable.net  Tue Jan 27 12:51:19 2004
From: hotrearia at jetable.net (Nicolas Lehuen)
Date: Tue, 27 Jan 2004 18:51:19 +0100
Subject: Python 2.3.3 : Win32 build vs Cygwin build performance ?
Message-ID: <4016a71d$0$15004$afc38c87@news.easynet.fr>

Hi,

Is it me, or does anyone else get significantly better pystone results under
Cygwin versus the standard Win32 build ?

CYGWIN 1.5.6 + python 2.3.3-1 :
$ time python /usr/lib/python2.3/hotshot/stones.py
Pystone(1.1) time for 50000 passes = 2.344
This machine benchmarks at 21331.1 pystones/second
         850004 function calls in 4.371 CPU seconds

   Ordered by: internal time, call count

   ncalls  tottime  percall  cumtime  percall filename:lineno(function)
    50000    1.351    0.000    2.917    0.000 pystone.py:133(Proc1)
    50000    1.132    0.000    1.202    0.000 pystone.py:53(copy)
        1    0.609    0.609    4.371    4.371 pystone.py:79(Proc0)
    50000    0.239    0.000    0.239    0.000 pystone.py:208(Proc8)
   150000    0.184    0.000    0.184    0.000 pystone.py:203(Proc7)
   150000    0.157    0.000    0.157    0.000 pystone.py:221(Func1)
    50000    0.147    0.000    0.200    0.000 pystone.py:229(Func2)
    50000    0.104    0.000    0.153    0.000 pystone.py:160(Proc3)
    50000    0.098    0.000    0.153    0.000 pystone.py:184(Proc6)
    50000    0.090    0.000    0.090    0.000 pystone.py:149(Proc2)
    50002    0.070    0.000    0.070    0.000 pystone.py:45(__init__)
    50000    0.068    0.000    0.068    0.000 pystone.py:177(Proc5)
    50000    0.067    0.000    0.067    0.000 pystone.py:170(Proc4)
    50000    0.055    0.000    0.055    0.000 pystone.py:246(Func3)
        1    0.000    0.000    4.371    4.371 pystone.py:67(pystones)
        0    0.000             0.000          profile:0(profiler)


real    0m26.603s
user    0m25.765s
sys     0m0.280s

Win32 :
C:\Documents and Settings\nlehuen>python c:\Python23\Lib\hotshot\stones.py
Pystone(1.1) time for 50000 passes = 4.1542
This machine benchmarks at 12036 pystones/second
         850004 function calls in 14.917 CPU seconds

   Ordered by: internal time, call count

   ncalls  tottime  percall  cumtime  percall filename:lineno(function)
        1    3.772    3.772   14.917   14.917 pystone.py:79(Proc0)
    50000    2.226    0.000    6.314    0.000 pystone.py:133(Proc1)
   150000    1.166    0.000    1.166    0.000 pystone.py:221(Func1)
   150000    1.123    0.000    1.123    0.000 pystone.py:203(Proc7)
    50000    1.075    0.000    1.075    0.000 pystone.py:208(Proc8)
    50000    0.939    0.000    1.410    0.000 pystone.py:53(copy)
    50000    0.903    0.000    1.279    0.000 pystone.py:229(Func2)
    50000    0.795    0.000    1.157    0.000 pystone.py:160(Proc3)
    50000    0.776    0.000    1.137    0.000 pystone.py:184(Proc6)
    50000    0.500    0.000    0.500    0.000 pystone.py:149(Proc2)
    50002    0.472    0.000    0.472    0.000 pystone.py:45(__init__)
    50000    0.416    0.000    0.416    0.000 pystone.py:170(Proc4)
    50000    0.394    0.000    0.394    0.000 pystone.py:177(Proc5)
    50000    0.361    0.000    0.361    0.000 pystone.py:246(Func3)
        1    0.000    0.000   14.917   14.917 pystone.py:67(pystones)
        0    0.000             0.000          profile:0(profiler)

(total real time elapsed > 30 seconds)




From __peter__ at web.de  Fri Jan  9 05:08:08 2004
From: __peter__ at web.de (Peter Otten)
Date: Fri, 09 Jan 2004 11:08:08 +0100
Subject: __init__, __slot__ and **keywordargs
References: <m1fzep36xi.fsf@lcpxdf.wm.lc.ehu.es>
Message-ID: <btluap$89d$01$1@news.t-online.com>

Zunbeltz Izaola wrote:

> I'm playing with __slot__ (new class) and the __init__ method of my
> class. I want the arguments of __init__ to be keywords and that the
> method initialize all the attributes in __slot__ to None except those
> in the argument of __init__ (Is this a good practice?). I've the
> following class

You misspelt: in fact it's __slots__, and it will work as expected. As far
as I know slots are an optimization technique that is useful to save some
space, when you have many (that would be millions) of small objects. It's
not meant as a safety belt for the programmer.
In your case, I wouldn't use it, but rather not initialize the attributes
not given as constructor - __init__() - arguments. Also, I would consider
the ability to provide additional arguments, say "Nickname", not a bug but
a feature. Of course you have to change your client code to test for

hasattr(person, "Birthday") 

instead of 

person.Birthday is None

Peter




From mwh at python.net  Tue Jan 13 06:39:52 2004
From: mwh at python.net (Michael Hudson)
Date: Tue, 13 Jan 2004 11:39:52 GMT
Subject: Why learn Python ??
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<btubno$bd8k6$1@ID-46268.news.uni-berlin.de>
	<tyf1xq5fbdb.fsf@pcepsft001.cern.ch> <87hdz0g2zk.fsf@pobox.com>
	<tyfwu7wdxrp.fsf@pcepsft001.cern.ch>
	<tyfsmikdxnj.fsf@pcepsft001.cern.ch>
Message-ID: <m3ptdoxek7.fsf@pc150.maths.bris.ac.uk>

Jacek Generowicz's alter ego <jacek.generowicz at cern.ch> writes:

> Jacek Generowicz <jacek.generowicz at cern.ch> writes:
> 
> > jjl at pobox.com (John J. Lee) writes:
> > 
> > > Jacek Generowicz <jacek.generowicz at cern.ch> writes:
> > > [...]
> > > > If you want to perform miracles, then learn Lisp. If you
> > > > merely want to write programs that rock, then learn Python.
> > > [...]
> > > 
> > > ...and then somebody argues that macros aren't a programming language
> > > feature, but a harmful means of inventing new languages, and then we
> > > get into that endless macro thread again...
> > 
> > Well they're all Nazis.
> 
> Godwin's Law !

I believe Godwin's Law was meant to be descriptive, not prescriptive.
HAND.

Cheers,
mwh

-- 
  LINTILLA:  You could take some evening classes.
    ARTHUR:  What, here?
  LINTILLA:  Yes, I've got a bottle of them.  Little pink ones.
                   -- The Hitch-Hikers Guide to the Galaxy, Episode 12


From michael at foord.net  Fri Jan 16 03:53:38 2004
From: michael at foord.net (Fuzzyman)
Date: 16 Jan 2004 00:53:38 -0800
Subject: best book
References: <mailman.372.1074117050.12720.python-list@python.org>
Message-ID: <8089854e.0401160053.36e0f1aa@posting.google.com>

km <km at mrna.tn.nic.in> wrote in message news:<mailman.372.1074117050.12720.python-list at python.org>...
> Hi all,
> 
> What is the best book to start with python ? i am have been working since 1 yr with Perl. 
> 
>  kindly enlighten,
> 
> thanks,
>  KM

There is a wealth of good, free python resources on the web.
For a comprehensive list of tutorials, online books and python
resources - Try :

http://www.voidspace.org.uk/coollinks/python_links.shtml

270 links in various sections.... 
Learning to program is a good online book, Dive into Python suits more
experienced programmers - whilst some of the tutorials will get you
the basics very quickly.
The Python documentation is good for built-in functions, types and the
standard libraries - which you will need to refer to a lot.

As a reference book I use the O'Reilly pocket reference book - very
useful and very handy (and not very expensive).

For learning to actually *use* Python (once I had grasped the basics)
I use (present tense) 'Programming Python' - from the same series as
'Learning Python' - (by Mark Lutz ?) I can't recommend it enough...
very good.

Fuzzyman

-- 

http://www.Voidspace.org.uk 
The Place where headspace meets cyberspace. Online resource site -
covering science, technology, computing, cyberpunk, psychology,
spirituality, fiction and more.

---
http://www.atlantibots.org.uk
http://groups.yahoo.com/group/atlantis_talk/
Atlantibots - stomping across the worlds of Atlantis.
---
http://www.fuchsiashockz.co.uk   
http://groups.yahoo.com/group/void-shockz
---

Everyone has talent. What is rare is the courage to follow talent
 to the dark place where it leads. -Erica Jong
Ambition is a poor excuse for not having sense enough to be lazy.
         -Milan Kundera


From webmaster at beyond-thoughts.com  Tue Jan  6 05:45:24 2004
From: webmaster at beyond-thoughts.com (Christoph Becker-Freyseng)
Date: Tue, 06 Jan 2004 11:45:24 +0100
Subject: PRE-PEP: new Path class
In-Reply-To: <ad052e5c.0401052128.766415cb@posting.google.com>
References: <vvivefh35qjv9a@news.supernews.com>
	<ad052e5c.0401052128.766415cb@posting.google.com>
Message-ID: <3FFA91C4.8090006@beyond-thoughts.com>

Dan Bishop wrote:
> "John Roth" <newsgroups at jhrothjr.com> wrote in message news:<vvivefh35qjv9a at news.supernews.com>...
> 
>>I'm adding a thread for comments on Gerrit Holl's pre-pep, which
>>can be found here:
>>
>>http://tinyurl.com/2578q
>>
> 
> ... 
> 
>>1) Should path be a subclass of str?
>>
>>No.
> 
> 
> So will the file constructor be "overloaded" to accept path objects? 
> What about all those functions in the os module?

IMO this is the bettter way.
However it might be useful for transition subclass str. (see my other 
posting)






From http  Mon Jan 12 08:38:41 2004
From: http (Paul Rubin)
Date: 12 Jan 2004 05:38:41 -0800
Subject: Why learn Python ??
References: <40029dad$0$28706$a729d347@news.telepac.pt>
Message-ID: <7xisjh1e3i.fsf@ruckus.brouhaha.com>

"Bicho Verde" <bichoverde at sapo.pt> writes:
>     And also I don't know exactly why would I learn Python rather than C#,
> C++ or Perl. Basicaly I don't know where to start, if there is much to do or
> if it is has it seems and there is software to everything nowadays and so
> doesn't make sense to spend time in learning a programming language.

I'd say don't bother with C++ unless you're working on a big
multi-person project.  Its design will make no sense to you unless
you've faced the problems that come up in those projects.  Otherwise
it's a big mess.

Perl has its fans and I can't promise you won't be one.  It's built
like a natural (spoken) language, that is, it wasn't designed, it just
sort of evolved, and has all kinds of specialized rules and exceptions
and multiple ways of doing the same thing.  Some people think that's
great.  Others (most Python fans) think Perl is a big mess.  The book
"Learning Perl" by Schwartz and Christiensen is definitely very good,
so you might look at it to decide if you like Perl.  But note that the
book only scratches the surface, and Perl gets messier the deeper you go.

C# is mostly Microsoft-specific and not much serious is done with it, IMO.

>     I just have this idea that I would like to contribute to the curve of
> accelarated exponential progress (technological singularity), artificial
> intelligence and so on. From that point of view there is much to do... But
> can I stand for it and where to start?
>       Anyone would help me and give me some hints?

Traditionally that kind of research has been done in Lisp.  You could
look at Winston and Horn's book on Lisp, which is also a reasonably
good introduction to AI methods.  


From aahz at pythoncraft.com  Wed Jan 21 19:38:26 2004
From: aahz at pythoncraft.com (Aahz)
Date: 21 Jan 2004 19:38:26 -0500
Subject: an example of a singleton design pattern in python?
References: <hc63caapdui.fsf@praxis.lsil.com>
Message-ID: <bun622$e8i$1@panix1.panix.com>

In article <hc63caapdui.fsf at praxis.lsil.com>,
Daniel Ortmann  <dortmann at lsil.com> wrote:
>
>Does anyone have an example of a singleton design pattern in python?

It appears that none of the other responses mentioned the two simplest
techniques:

* Within a single module, use a global class as your singleton object.

* Across modules, use a module as your singleton object.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

A: No.
Q: Is top-posting okay?


From mcfletch at rogers.com  Mon Jan  5 16:37:34 2004
From: mcfletch at rogers.com (Mike C. Fletcher)
Date: Mon, 05 Jan 2004 16:37:34 -0500
Subject: PRE-PEP: new Path class
In-Reply-To: <vvivefh35qjv9a@news.supernews.com>
References: <vvivefh35qjv9a@news.supernews.com>
Message-ID: <3FF9D91E.2090302@rogers.com>

John Roth wrote:
...

>1) Should path be a subclass of str?
>
>No. Outside of the difficulty of deciding whether it's a
>subclass of single byte or unicode strings, it's a pure
>and simple case of Feature Envy. Granted, there will
>be times a developer wants to use string methods, but
>the most common operations should be supported directly.
>  
>
It's not the methods that make me want to use str/unicode as the base, 
it's the ability to pass the resulting instances to built-in methods 
that explicitly expect/require str/unicode types.  Not sure how many of 
the core functions/libraries still have such requirements, but I'd guess 
it's a few.

That said, I don't mind making path it's own base-class, I just *really* 
want to be able to pass them to path-unaware code without extra coercian 
(otherwise switching a module to *producing* paths instead of raw 
strings will cause the *clients* of that module to break, which is a 
serious problem for rapid adoption).

>3) Should the / operator map joinpath.
>  
>
Agreed, no.  As for using + for join, that will break a lot of code that 
does things like this:

    p = mymodule.getSomeFilename()
    backup = p + '.bak'
    copyfile( p, backup )
    open( p, 'w').write( whatever )

i.e. we're thinking of returning these things in a lot of situations 
where strings were previously returned, string-like operations should 
IMO, be the norm.  But then we disagree on that anyway ;) .

>4) Should path expose an iterator for listdir(?)
>
>I don't see why not, as long as the path is to a
>directory.
>  
>
Seems ambiguous to me.  Also seems silly to use a generator when we're 
producing a list anyway from the underlying call, might as well return 
the list to allow length checks and random access.  Iterators for 
"ancestors" might be useful, but again, doesn't really seem like it 
needs to be __iter__ instead of "ancestors".

>5) Should == operator be the same as os.path.samefile()?
>
>Why not...
>  
>
__eq__ sounds about right.  I gather this call goes out to the 
filesystem first, though.  Might be good to first check for absolute 
equality (i.e. the same actual path) before doing that.

>6) Path.open()?
>
>Of course.
>  
>
Ditto.

>7) Should the various gettime methods return Datetime
>objects.
>
>Of course.
>  
>
What are we doing for Python 2.2 then?  I agree with the principle, but 
we should likely have a fallback when datetime isn't available.

>8) Touch method?
>
>Of course.
>  
>
Neutral, seems fine.

>9) Current OS constants?
>
>What are they? Are we talking about the four
>constants in the access() function, or about something
>else?
>  
>
Don't know myself.

>10) Commonprefix, walk and sameopenfile?
>
>Commonprefix should be a string or list method,
>it doesn't fit here.
>  
>
Path commonprefix are different operations from str commonprefix.  Paths 
should only accept entire path-segments (names) as being equal, while 
strings should accept any set of characters:

    '/this/that/those/them'
    '/this/thatly/those/them'

should see '/this/' as the commonprefix for the paths, not '/this/that'.

>walk is a nice function, but it should be redone to
>use the visitor pattern directly, with different method
>names for files, directories and whatever else a
>particular file system has in it's warped little mind.
>  
>
Reworking walk is probably a good idea.  I'll let others worry about it, 
as I've re-implemented the functionality so many times for my own code 
that I'm just sick of it :) .

>11) rename join and split.
>
>I wouldn't bother. Since I'm against making it a
>subclass of str(), the issue doesn't arise.
>  
>
No real preference one way or another here.  join -> "append" for paths 
seems fine.  split -> "elements" or "steps" for paths also seems fine.

>12) Should == compare file sizes.
>
>No. Might have a method to do that.
>  
>
Agreed, though even then, if we have a method that returns file-sizes:

    path( ... ).size() == path( ... ).size()

seems almost as reasonable as having a method for it?

>13) chdir, chmod, etc?
>
>No. This has nothing to do with pathname.
>  
>
chmod has to do with altering the access mode of a file/directory by 
specifying it's path, no?  Seems like it could readily be a method of 
the path.  chdir should accept a path, otherwise doesn't seem like it 
should be a method.

>14. Unicode filenames
>
>Have to have them on Windows and probably
>on the Mac.
>  
>
Yes.

>15. Should files and directories be the same
>class.
>  
>
Replied to this in the sub-thread...

Enjoy all,
Mike

_______________________________________
  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://members.rogers.com/mcfletch/






From vmontressor at yahoo.com  Mon Jan 12 05:35:11 2004
From: vmontressor at yahoo.com (Vincent Montressor)
Date: 12 Jan 2004 02:35:11 -0800
Subject: Restoring my own PyGNOME panel applets under GNOME 1.4 [SOLVED]
References: <88fe7467.0401110852.5480a822@posting.google.com>
Message-ID: <88fe7467.0401120235.153e6fe1@posting.google.com>

vmontressor at yahoo.com (Vincent Montressor) wrote in message news:<88fe7467.0401110852.5480a822 at posting.google.com>...

> I'm playing around with writing my own panel applets, and I'm trying
> to figure out how to get my panel applets to be restored when I log
> in.  As an experiment, I'm using the simple clock applet that comes
> with PyGNOME (clock-applet.py).  It works fine when I run it from the
> shell, but when I log out and log in again, there's just a tiny
> GNOME-foot icon where the applet should be.

Ah, never mind: adding the applet to my GNOME startup programs list solved it.  Duh.


From mhammond at skippinet.com.au  Thu Jan 15 21:07:30 2004
From: mhammond at skippinet.com.au (Mark Hammond)
Date: Fri, 16 Jan 2004 13:07:30 +1100
Subject: Multithreaded COM server problem...
In-Reply-To: <0pr700ddfdf3op14oulk7u82cthaped040@4ax.com>
References: <5a90009ufdd66okc8osajrn1a5kokp86mk@4ax.com>
	<btpug4$1oag$1@arachne.labyrinth.net.au>
	<gdv100hgp4tgnclf0c4a4nlr58npi5q3ir@4ax.com>
	<bttcff$qs1$1@arachne.labyrinth.net.au>
	<0pr700ddfdf3op14oulk7u82cthaped040@4ax.com>
Message-ID: <bu7h15$2d9k$1@arachne.labyrinth.net.au>

John Lull wrote:
> Mark Hammond <mhammond at skippinet.com.au> wrote (with possible
> deletions):
> 
> 
>>John Lull wrote:
> 
> ...
> 
>>>Unfortunately, this one has to be a local server since it's providing shared
>>>access to a pool of hardware devices from multiple distributed clients. I've
>>>carefully reviewed chapters 5 & 12, and appendix D, and wasn't able to find
>>>anything addressing threading models in the local server in detail. If I've
>>>missed something, I'd be grateful for any additional hints. 
>>
>>The problem is that your client code is not running a message loop.  If 
>>you change the loop of your client test code to something like:
>>
>>for i in range(delay)*10:
>>     time.sleep(0.1)
>>     pythoncom.PumpWaitingMessages()
>>
>>It works as you expect.  A better choice would probably be 
>>win32event.MsgWaitForMultipleObjects, but that depends on what your app 
>>really does.
>>
>>Mark.
> 
> 
> I presume you meant my server code. 

Nope - I meant the client.  The server is already running such a loop 
thank to localserver.py, which is hosting the object.

The client code's main (and only) thread is blocked in a system call, 
but it appears COM wants it to pump messages so the marshalling magic 
happens.  I can only speculate why COM needs this to happen in this 
trivial case, but COM's rules do state this requirement.

> This still leaves all calls to the
> server running in a single thread, however. If I insert a call to
> PumpWaitingMessages() in a short operation, and it happens to start a
> long operation, the result of that short operation will be delayed
> until the long operation completes. This will make my server unusable.

Make the change I suggested, and it works as you hope.

> At first glance this seems to do what I want -- requests to the server
> seem to run from a thread pool. However, I also get intermittent (but
> frequest) startup errors, with a Microsoft Visual C++ Runtime Library
> error dialog (during pythoncom.PumpMessages but before my server
> module gets imported) reporting:
>   Runtime Error!
>   Program: c:\Apps\Python2.2\pythonw.exe
>   abnormal program termination

That sucks, and is almost certainly a thread-state error.  If you have a 
debug build of Python, it will offer to break into the debugger at this 
point.

Mark.



From christian.eslbauer at liwest.at  Sun Jan  4 09:15:27 2004
From: christian.eslbauer at liwest.at (EsC)
Date: Sun, 4 Jan 2004 15:15:27 +0100
Subject: SMTP - Topic & add files
References: <1073137983.983243@news.liwest.at>
	<3d06fae9.0401031339.7a2dcdb5@posting.google.com>
Message-ID: <1073224147.517695@news.liwest.at>

hy!

thanks for this simple and excellent solution!

greetings
EsC


"jmdeschamps" <jmdeschamps at cvm.qc.ca> schrieb im Newsbeitrag
news:3d06fae9.0401031339.7a2dcdb5 at posting.google.com...
> "EsC" <christian.eslbauer at liwest.at> wrote in message
news:<1073137983.983243 at news.liwest.at>...
> > Hy!
> >
> > probably a dummy question, but i don't
> > know how to set a Topic-Text and add
> > Files to an email ...
> >
> > i use the SMTPLIB module and the
> > function/method: .sendmail(from,to,msg)
> >
> > but how can i set a topic Text?
> > is there an other function/method, or
> > must it be encoded within the message-text?
> >
> > thanks for your help
> > EsC
>
> its in the msg parameter of sendmail such as :
>
> yourSmtp = smtplib.SMTP('yourMailServer.org')
>
> #envoi un message
> #ARGUMENTS from sendMail
> #from: your own client adress
> #to: the intended recipient's adress
> #msg: what will really show...in different fields
> monSmtp.sendmail("From: ownMail at yourMailServer.org",
>                        "To: recipientAdresse at hisServer.org",
>                        "From:joe\r\nTo: Owner \nSubject: 3 weeks left"
>                        + "\n\nTopic text of the  message! ")
>
> on Windows, may differ slightly on Linux :)
>
> Good messaging,
>
> JM




From alanmk at hotmail.com  Wed Jan 21 15:53:09 2004
From: alanmk at hotmail.com (Alan Kennedy)
Date: Wed, 21 Jan 2004 20:53:09 +0000
Subject: Accessing a shared generator from multiple threads.
References: <7934d084.0401152058.164a240c@posting.google.com>
	<40083eac$0$321$e4fe514c@news.xs4all.nl>
	<mailman.446.1074283391.12720.python-list@python.org>
	<40086C6E.8536542C@hotmail.com>
	<40098f12$0$320$e4fe514c@news.xs4all.nl>
	<400AB936.BA1D9D73@hotmail.com>
	<7934d084.0401181805.71029c2f@posting.google.com>
Message-ID: <400EE6B5.27C6B694@hotmail.com>

[Andrae Muys]
> Moved to email for higher bandwidth.  Feel free to quote to usenet if
> you desire. 

[Alan Kennedy]
>> I think I'm with Aahz on this one: when faced with this kind of 
>> problem, I think it is best to use a tried and tested inter-thread 
>> communication paradigm, such as Queue.Queue. In this case, Queue.Queue
>> fits the problem (which is just a variation of the producer/consumer
>> problem) naturally. Also, I doubt very much if there is much excessive
>> resource overhead when using Queue.Queues. 

[Andrae Muys]
>Well I'm puzzled, because I couldn't see an easy way to use Queue.Queue
>to achieve this because this isn't a strict producer/consumer problem.
>I am trying to synchronise multiple consumers, but I don't have a
>producer.  So the only way I can see to use Queue.Queue to achieve 
>this is to spawn a thread specifically to convert the iterator in to 
>a producer. 

Andrae,

I thought it best to continue this discussion on UseNet, to perhaps
get more opinions.

Yes, you're right. Using a Queue in this situation does require the
use of a dedicated thread for the producer. There is no way to "pull"
values from a generator to multiple consumers through a Queue.Queue.
The values have to be "pushed" onto the Queue.Queue by some producing
thread of execution.

The way I see it, the options are

Option 1. Spawn a separate thread to execute the producing generator.
However, this has problems:-

A: How do the threads recognise the end of the generated sequence?
This is not a simple problem: the Queue simply being empty does not
necessarily signify the end of the sequence (e.g., the producer thread
might not be getting its fair share of CPU time).

B: The Queue acts as a (potentially infinite) buffer for the generated
values, thus eliminating one of the primary benefits of generators:
their efficient "generate when required" nature. This can be helped
somewhat by limiting the number of entries in the Queue, but it is
still slightly unsatisfactory.

C: A thread of execution has to be dedicated to the producer, thus
consuming resources.

Option 2. Fill the Queue with values from a main thread which executes
the generator to exhaustion. The consuming threads simply peel values
from the Queue. Although this saves on thread overhead, it is the
least desirable in terms of memory overhead: the number of values
generated by the generator and buffered in the Queue could be very
large.

Option 3. Use the same paradigm as your original paradigm, i.e. there
is no producer thread and the consuming threads are themselves
responsible for calling the generator.next() method: access to this
method is synchronised on a threading.Lock. I really like this
solution, because values are only generated on demand, with no
temporary storage of values required.

I think that an ideal solution would be to create a dedicated class
for synchronising a generator, as my example did, BUT to implement the
same interface as Queue.Queue, so that client code would remain
ignorant that it was dealing with a generator.

Here is my version of such a beast

# -=-=-=-=-= file GenQueue.py =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
import threading

class Empty(Exception): pass
class Exhausted(StopIteration): pass
class IllegalOperation(Exception): pass

class GenQueue:
  "Simulate a Queue.Queue, with values produced from a generator"

  def __init__(self, gen):
    self.lock = threading.Lock()
    self.gen = gen

  def __iter__(self):
    return self

  def _get(self, block=1):
    if self.lock.acquire(block):
      try:
        try:
          return self.gen.next()
        except StopIteration:
          raise Exhausted
      finally:
        self.lock.release()
    else:
      raise Empty

  def next(self):
    return self._get(1)

  def get(self, block=1):
    return self._get(block)

  def get_nowait(self):
    return self._get(0)

  def put(self, item, block=1):
    raise IllegalOperation

  def put_nowait(self, item):
    self.put(item, 0)

  def full(self):
    return False

  def empty(self):
    return False

  def qsize(self):
    return 1j

#-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

And here is some code that tests it

#-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

import sys
import time
import thread
import GenQueue

def squares(n):
  i = 1
  while i <= n:
    yield i*i
    i = i+1

def test_blockget(results, queue):
  while 1:
    try:
      results.append(queue.get())
    except GenQueue.Empty:
      raise TestFailure
    except GenQueue.Exhausted:
      break

def test_iter(results, queue):
  for v in queue:
    results.append(v)

def test_noblockget(results, queue):
  while 1:
    try:
      results.append(queue.get_nowait())
    except GenQueue.Empty:
      pass
    except GenQueue.Exhausted:
      break

def threadwrap(func, queue, markers):
  markers[thread.get_ident()] = 1
  results = []
  func(results, queue)
  print "Test %s: Thread %5s: %d results." % (func.__name__, \
    thread.get_ident(), len(results))
  del markers[thread.get_ident()]

def test():
  numthreads = 10
  for tfunc in (test_blockget, test_iter, test_noblockget):
    print "Test: %s ------------------------------->" % tfunc.__name__
    threadmarkers = {}
    q = GenQueue.GenQueue(squares(100))
    threads = [thread.start_new_thread(threadwrap,\
                (tfunc, q, threadmarkers)) for t in
xrange(numthreads)]
    while len(threadmarkers.keys()) > 0:
      time.sleep(0.1)

if __name__ == "__main__":
  test()

#-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

I find the combination of the iteration protocol and a Queue
intriguing: in this case, Queue.get() and iter.next() mean the same
thing. Or maybe I'm just being sucked in by the syntactic niceties of
something like

def worker(inq, outq):
  for thing in inq: outq.put(thing.work()) 

I'm interested to hear other opinions about the commonalities and
differences between Queues and iterators. 

One problem that is always in the back of my mind these days is how
one could write a dispatch-based coroutine scheduler that would work
efficiently when in communication (through Queue.Queues?) with
independently executing coroutine schedulers running on other
processors in the box. (And before you jump in shouting "Global
Interpreter Lock!", remember jython + generators will be able to do
this).

Not that I need such a thing: it's just a fun thing to think about,
like crosswords :-)

cheers,

-- 
alan kennedy
------------------------------------------------------
check http headers here: http://xhaus.com/headers
email alan:              http://xhaus.com/contact/alan


From harry.g.george at boeing.com  Wed Jan 14 06:50:30 2004
From: harry.g.george at boeing.com (Harry George)
Date: Wed, 14 Jan 2004 11:50:30 GMT
Subject: Printing to console, no scroll
References: <mailman.364.1074102636.12720.python-list@python.org>
Message-ID: <xqxr7y2sq9l.fsf@cola2.ca.boeing.com>

"Totte Karlsson" <mtk at qm.com> writes:

> Hi,
> How can I print to the console without having it scrolling to a new line for
> each print statement?
> I want to print a count down in the console, but for each count it scrolls
> the screen (of course).
> 
>  Is there another way?
> 
> Here is the simple script for now
> 
> print "Closing window in :"
> for second in range(10):
>     time.sleep(1)
>     print `10-second` +" seconds"
> 
> thanks
> /totte
> 
> 
> 
> 

You need to flush after the print statements.  If you have several
prints (not just 1 as in this example), it is easier to hide in a
separate function.

def msg(txt):
    sys.stdout.write(txt)
    sys.stdout.flush()

> for second in range(10):
>     time.sleep(1)
>     msg(`10-second` +" seconds ")  #add a space at the end to delimit
> print    #to finish off the line


-- 
harry.g.george at boeing.com
6-6M31 Knowledge Management
Phone: (425) 342-5601


From seanl at chaosring.org  Mon Jan  5 00:44:15 2004
From: seanl at chaosring.org (Sean R. Lynch)
Date: Sun, 04 Jan 2004 21:44:15 -0800
Subject: Creating a capabilities-based restricted execution system
In-Reply-To: <btaakg$1dul$1@nadya.doma>
References: <LmmdnUn4seDeGWuiXTWc-w@speakeasy.net> <bt788l$1pej$1@nadya.doma>
	<d7ycncKp5rket2qiXTWc-g@speakeasy.net> <bt7i9i$236v$1@nadya.doma>
	<srudnTjvU9BOH2qiRVn-uA@speakeasy.net> <bta3hv$17s1$1@nadya.doma>
	<mvScnSDrma66AWWiXTWc-g@speakeasy.net> <btaakg$1dul$1@nadya.doma>
Message-ID: <e-qcnQCPnLwyZGWiXTWc-w@speakeasy.net>

I put up a page on my Wiki with what I can remember off the top of my 
head of what we've discussed so far and some of what I've implemented so 
far (though my implementation is in flux). It's at 
<http://wiki.literati.org/CapablePython>. Feel free to add comments.


From michael at foord.net  Fri Jan 16 04:34:16 2004
From: michael at foord.net (Fuzzyman)
Date: 16 Jan 2004 01:34:16 -0800
Subject: Setting Window Size using Pack Under Tkinter
Message-ID: <8089854e.0401160134.5674a86c@posting.google.com>

I'm having trouble implementing my GUI using Tkinter......
I've been working through the Tkinter tutorials from 'Programming
Python' and am generally happy enough with the functionality and feel
of the results *but* - I can't see how to set the size of the root
window (or any top level window) and to stop it being resized........

Thanks for any help.

Fuzzyman


-- 

YAPLP
Yet Another Python Links Page
http://www.voidspace.org.uk/coollinks/python_links.shtml

Python Utils
http://www.voidspace.org.uk/atlantibots/pythonutils.html

--

http://www.Voidspace.org.uk
The Place where headspace meets cyberspace. Online resource site -
covering science, technology, computing, cyberpunk, psychology,
spirituality, fiction and more.

---
http://www.atlantibots.org.uk
http://groups.yahoo.com/group/atlantis_talk/
Atlantibots - stomping across the worlds of Atlantis.
---
http://www.fuchsiashockz.co.uk  
http://groups.yahoo.com/group/void-shockz
---

Everyone has talent. What is rare is the courage to follow talent
to the dark place where it leads. -Erica Jong
Ambition is a poor excuse for not having sense enough to be lazy.
         -Milan Kundera


From HQ-611 at interliant.com  Fri Jan 30 09:12:28 2004
From: HQ-611 at interliant.com (HQ-611 at interliant.com)
Date: Fri, 30 Jan 2004 08:12:28 -0600
Subject: NAV detected a virus in a document you authored.
Message-ID: <OFFC0FFF22.6574F7A5-ON86256E2B.004E0C07@interliant.com>

Please contact your system administrator.


The scanned document was QUARANTINED.


Virus Information:
The attachment seqlt.pif contained the virus W32.Novarg.A at mm and could NOT
be repaired.





From stefano.covino at libero.it  Thu Jan 15 17:14:01 2004
From: stefano.covino at libero.it (Stefano Covino)
Date: Thu, 15 Jan 2004 23:14:01 +0100
Subject: function minimization
References: <pan.2004.01.14.09.08.27.455056@libero.it>
	<GuiNb.74$O41.733@amstwist00>
Message-ID: <pan.2004.01.15.22.14.01.473159@libero.it>


> 
> See
> 
> http://pylab.sourceforge.net/
> 
> then
> 
> optimize.py
> 
> /Carl

Yes, this is exactly what I was looking for. 

Thank you a lot,
		Stefano



From wfolta at netmail.to  Mon Jan 19 17:22:29 2004
From: wfolta at netmail.to (Wayne Folta)
Date: Mon, 19 Jan 2004 17:22:29 -0500
Subject: New to Python: my impression v. Perl/Ruby
In-Reply-To: <87ad4kxees.fsf@pobox.com>
References: <mailman.493.1074484056.12720.python-list@python.org>
	<87ad4kxees.fsf@pobox.com>
Message-ID: <F79E6272-4ACD-11D8-9496-000A959CB2EC@netmail.to>

John,

I think one problem here is that somehow I left a paragraph out of my 
original posting. After years and years of Perl use, I evaluated Ruby 
and Python and have adopted Python. Ruby intrigues me, but it's not 
what I will use to get things done. I thought that as a newcomer to 
both, I though I might have a different perspective from people who 
were native users, hence my posting.

I can see that without that info, it may have appeared that I was 
possibly advocating Ruby over Python, which would be inappropriate in a 
Pyton forum. I apologize for the confusion!

> Well, that's not exactly a huge leap given any knowledge of how the
> internet works.  I'm not sure that Python's docs should be in the
> business of educating people about that...

There's no necessary connection between the protocol stack and software 
packages. It's good and sensible that POP3 is built on socket, but it 
could be based on my_sockets or _socket or who knows what. I'm not 
asking that the entire protocol stack be documented, and it's not as if 
"obvious" things aren't documented in detail elsewhere in Python. (For 
example, there's an entire paragraph on socket's gethostname(). I could 
rhetorically say this is so obvious it should be replace with "returns 
host name" or "see GETHOSTNAME(3)"?)

For me, it's just totally natural that I'd say, "The POP3 package is 
built using the socket package and socket exceptions are not caught by 
POP3." That single sentence immediately tells me everything I needed to 
know. That's the way I'd document any higher-level package, regardless 
of whether there was an obvious candidate for underlying packages (or 
classes) or not. For me, it's as basic as mentioning what types a 
function returns, or what types its arguments are, or what class is a 
subclass of another.

> ...but the fact that there is no timeout support in client modules of
> the socket module is a known bug:

This is a bug? I guess it can cause problems in the underlying package, 
but I sure hope that the exception is handled and then re-raised as 
timeout_proto or something distinct from error_proto. I personally 
prefer fine-grained exception, which I believe best takes advantage of 
multiple-except try clauses. I hate catching something then having to 
sort through variables to figure out what really happened.

 From an external viewpoint I don't see that much difference between 
"fixing" this bug and simply documenting the other exceptions you might 
see from underlying packages.

> In the absence of some explanation of what you mean by "Real OO", that
> sounds trollish.

No trolling intended. I simply have read what Python advocates say 
about Python and what Ruby advocates say about Ruby (in comparison to 
languages like Python) and said that. I'm making no statement about 
reality, but simply about what advocates mantras are. (Or actually, as 
I carefully said, "might be".)

(Actually, now that I reread it, I should've said "pure OO", which I 
believe is more reflective of their statements. And this has some basis 
in fact, I believe, if you look at the v1 of Ruby and Python and what 
is first-class and what is not.)

> I don't see how a missing feature in Python reveals any difference in
> culture between Python and Ruby, other than perhaps that the Ruby
> people like implementation inheritance more than the people who
> designed the Python standard library.

You have taken my observation and transformed it into ignorance on my 
part and a supposed bug on Python's part. Once you've done that, yes, 
it is no longer illuminative.

Again, as you yourself say, they chose to subclass protocol services 
off of a class 'protocol' and Python did not. In fact, Python chose to 
not subclass POP3 from anything. Why? Because of the culture, in my 
opinion. Ruby emphasizes OO and that it's "pure OO" (their opinion) and 
so an implementation that involves a Smalltalk-ish subclassing of 
everything recommends itself.

Python has a different culture where such strict tree-like class 
structure does not recommend itself. Python's "batteries included" 
philosophy resulted in a more straightforward and (mostly) better 
documented way to do it.

Intellectually, I prefer Ruby. Ruby and Smalltalk intrigue me. But the 
"pure OO" approach (my words this time) is annoying, and even at some 
point inconsistent, as I mentioned in my paragraph about 0.step(). I 
feel like Python has got the right balance where it's OO and pretty 
much fully so, but not fanatically so. And it's what I've adopted.

You can see that the three languages have been driven by central 
personalities and the user groups reflect these personalities. Before 
Perl were various languages and shell/awk/sed. Larry triangulated 
things and stuck a flag in the semi-script, expedient measure area. 
("Do what I mean", "Swiss Army Chainsaw".) His brilliance was in tying 
very disparate tools together in one syntax that hung together and did 
the "right thing" based on how these other tools worked.

(And he got away from some of the weaknesses of shell scripts, such as 
substititional evaluation, which were there because they were 
interactive first, then became scripting languages. Somehow TCL didn't 
learn this kind of lesson and I've never liked it.)

Unfortunately, expedient measures don't scale well and Perl has, as 
someone famous said, pushed well beyond its performance envelope. 
(Probably in v5.)

Guido was able to learn from Perl and moved more towards a language 
that was farther removed from "scripting" with a cleaner syntax, solid 
OO, etc. But he kept what I'd consider the best of Perl's expediency 
philosophy. ("Batteries Included".)

Matz saw both of these and went for a "pure", Smalltalk-ish OO. He also 
kept some of Perl's expediency, but in more of a syntactic way. So I 
find Ruby to be a strange combination of almost fanatical OO philosophy 
but at the same time an expediency of syntax.

Just my opinion. But in summary, I prefer Python. It feels right to me. 
OO but not what I'd call the fanatical OO of Ruby. Clean syntax. Good 
packages bundled. Somehow, I would say it has a less-flexible syntax, 
but more-flexible philosophy. (Which is good.)

(OK, one thing to add is I'm on MacOS X and Python's EasyDialogs is 
VERY convenient and attractive and the other programs don't seem to 
have an equivalent. It just doesn't make sense for me to program with 
something that doesn't allow for easy GUI interaction with a user on a 
machine with such a great GUI.)




From ggg at zzz.it  Wed Jan 28 08:13:50 2004
From: ggg at zzz.it (deelan)
Date: Wed, 28 Jan 2004 14:13:50 +0100
Subject: newsgroup lib
In-Reply-To: <6b17fa95.0401280501.4be454cb@posting.google.com>
References: <6b17fa95.0401280501.4be454cb@posting.google.com>
Message-ID: <t8h8vb.7l5.ln@news1.interplanet.it>

Jesper Olsen wrote:

> Is there a python module for accessing newsgroup articles?
> 
> Something similar to urllib for downloading web pages...
nttplib?
see: <http://www.python.org/doc/current/lib/module-nntplib.html>



-- 
email: goldicus1970 AT yahoo.it
blog: http://www.deelan.com/






From elainejackson7355 at home.com  Fri Jan 30 01:07:52 2004
From: elainejackson7355 at home.com (Elaine Jackson)
Date: Fri, 30 Jan 2004 06:07:52 GMT
Subject: conditional expression sought
References: <pRbSb.330334$ts4.37644@pd7tw3no>
	<mailman.1000.1075402284.12720.python-list@python.org>
	<P6iSb.334480$ts4.82507@pd7tw3no>
	<6PjSb.138487$6y6.2697536@bgtnsc05-news.ops.worldnet.att.net>
Message-ID: <YwmSb.334817$X%5.83233@pd7tw2no>

Thanks for your help. I just looked at some values of random.randint(0,1) in my
interpreter, and one of them was 0. Getting nonboolean values from conjunction
and disjunction allows conditional evaluation of expressions; for example:
reciprocal = lambda x: (x!=0 and 1.0/x) or (x==0 and "undefined").

"wes weston" <wweston at att.net> wrote in message
news:6PjSb.138487$6y6.2697536 at bgtnsc05-news.ops.worldnet.att.net...
| Elaine,
|     The last code line:
|
| print "I would have liked this to be B[2] = ",B[2]
|
| prints the value of B[2]; the value you don't want.
| I think what you meant was that you want B[2] to be
| 0.0 not false. bool(0.0) does equal false.
| ---------------------------------------------------
| The code:
|
| A.append(bool(randint(0,1)))
|
| will always yield an A of [true,true,true]
| ---------------------------------------------------
| I didn't know this about python, and I'm not sure I
| like it:
|
| wes at linux:~/amy> python
|
|  >>> print 1.1 and 2.2
| 2.2
|  >>> print 2.2 and 1.1
| 1.1
|  >>> print (1.1 and 2.2)
| 2.2
|
| The order is important. To me, it should be printing true
| and not either number or the last number.
|




From sdeibel at wingide.com  Mon Jan 19 12:38:49 2004
From: sdeibel at wingide.com (Stephan Deibel)
Date: Mon, 19 Jan 2004 12:38:49 -0500 (EST)
Subject: Using python for _large_ projects like IDE
In-Reply-To: <bug7j5$acg$1@news-reader3.wanadoo.fr>
Message-ID: <Pine.LNX.4.50.0401191231500.3132-100000@hedgehog>

On Mon, 19 Jan 2004, Eric Brunel wrote:
> > I am a little experienced python programmer (2 months).  I am somewhat
> > experienced in C/C++.  I am planning (now in design stage) to write an
> > IDE in python.  The IDE will not be a simple one.  I had an idea of
> > writing the IDE in C/C++, as it is a big project, bcoz of the
> > following
> > 
> > 1. if python is used, then the memory required for running the IDE
> > will be high.
> 
> It's quite hard to tell, since I've never seen anybody writing a significant 
> application *both* in C/C++ and Python to compare their memory usage... I'd say 
> memory usage depends a lot more on the design than on the language used. Python 
> does introduce an extra cost in memory consumption, but the larger the 
> application, the less you'll notice it.

Actually, I've done a little of this in areas where Python was too slow or
memory intensive, by first writing in Python and then rewriting in C or
C++ (so I briefly had two implementations of the same thing).

You can do things in Python to reduce memory consumption and increase
speed, and you can recode select portions in C/C++ also, and which you
choose depends on the code, situation, requirements, etc.  Similarly,
whether memory usage is significantly greater in Python depends on what
you're doing.

The best approach is to write in pure Python and recode on select *small
as possible* parts in C/C++.  I started by doing whole modules and quickly
found out that minimizing the size of the C/C++ code base is better than
having whole modules in one or the other.  The ability to integrate back
and forth is good enough that this is quite doable.

> > Are there any ways to forsee the performance critical parts? > 
> I really think you shouldn't care; remember, "premature optimization is the root 
> of all evil" ;-)

Absolutely:  Use a profiler, not your brain, to find the parts that are
problems and need to be converted!

Stephan Deibel

--
Wing IDE for Python
Archaeopteryx Software, Inc
Take Flight!

www.wingide.com



From wish2banonymous  Thu Jan  1 05:40:28 2004
From: wish2banonymous (PPeterson)
Date: Thu, 1 Jan 2004 18:40:28 +0800
Subject: pynettestuser
Message-ID: <bt0teu$fvt515@imsp212.netvigator.com>

Hi,

I am a newbie to python. python installer created a directory named
pynettestuser in the c:\documents and settings. What is that? Thanks.

PP




From hjwidmaier at web.de  Thu Jan  8 16:39:39 2004
From: hjwidmaier at web.de (Hans-Joachim Widmaier)
Date: Thu, 08 Jan 2004 22:39:39 +0100
Subject: Tkinter button command curiousity
References: <srdrvv47qvrrb6r26bkuh925phb1lpqkno@4ax.com>
Message-ID: <pan.2004.01.08.21.39.31.923125@web.de>

Am Thu, 08 Jan 2004 15:08:56 -0500 schrieb mksql:

> New to Tkinter. Initially, I had some code that was executing button commands at
> creation, rather than waiting for user action. Some research here gave me a
> solution, but I am not sure why the extra step is necessary.

There is no "extra step," as you will see.

> This causes the "graph" function to execute when the button is created:
> 	Button(root, text='OK', command=graph(canvas)))

Here you are calling graph() immediatly and bind the result to the
parameter 'command' - most likely not the intended effect (as you
observed).

> However, this waits until the button is pressed (the desired behavior):
> 	def doit():
> 	     graph(canvas)
> 	Button(root, text='OK', command=doit))

Here you bind the function object 'doit' to the command parameter, which
will then be called when the button is clicked on. You could also bind
the 'graph' function object to command, but then you cannot give it your
argument 'canvas'. Lambdas are often used to overcome this problem, but
your 'doit' local function essentially amounts to the same.

> Functionally, what is the difference? Why do I need to create a
> function, to call a function, simply to make a button command wait until
> pressed? Is there a better method?

The difference is, again:

def function(blah)
    pass

Here, 'function(x)' calls the function, whereas 'function' (without the
parenthethis) is just the function object (which can be bound to a name
which then later can be used to call it).

A better method? Would you call this better?

    Button(root, text='OK', command=lambda event, cvs=canvas: graph(cvs))

Usually, Tkinter programs employ a class that implements the GUI. Here you
can keep your canvas in a class attribute and use it in the callback
method:

class myGUI(Frame):
     # ....
         self.canvas = Canvas(root, ...)
         Button(root, text='OK', command=self.graph)

     def graph(self, event=None):
         # Use self.canvas

Hope this helps,
Hans-Joachim




From cartermark46 at ukmail.com  Tue Jan 20 11:59:37 2004
From: cartermark46 at ukmail.com (Mark Carter)
Date: 20 Jan 2004 08:59:37 -0800
Subject: Python-based file synchronizer (like Unison)?
References: <ua2ud1-evk.ln1@jowls.lairds.org>
Message-ID: <d3c9c04.0401200859.52b75453@posting.google.com>

Kyler Laird <Kyler at news.Lairds.org> wrote in message news:<ua2ud1-evk.ln1 at jowls.lairds.org>...
> I've been using Unison
> 	http://www.cis.upenn.edu/~bcpierce/unison/
> for awhile and it causes me a lot of grief.  I'd love to have a
> Python version which would be vastly easier to modify.
> 
> Anyone know of anything like this?  

I'm involved with DirSync - which is written in Python, and requires wxPython:
http://sourceforge.net/projects/dirssync/


From csgcsg39 at hotmail.com  Tue Jan 20 12:34:49 2004
From: csgcsg39 at hotmail.com (C GIllespie)
Date: Tue, 20 Jan 2004 17:34:49 -0000
Subject: simple class question
Message-ID: <bujorn$u9g$1@ucsnew1.ncl.ac.uk>

Dear all,

I'm new to both python and OOP, so could I ask a simple question.

I have class:

class species:
    __init__(self,pop=0):
        self.pop=pop

Now I want to do something like this:

X=species(pop=10)
Y=species(pop=X.pop)
OK, but now I want to update X.pop and have that mirrored in Y.pop, i.e. if
X.pop=5, Y.pop now equals 5.

What is the best/nicest/simplest way of doing this?

Many thanks

Colin




From ajborla at bigpond.com  Fri Jan  9 00:44:37 2004
From: ajborla at bigpond.com (Anthony Borla)
Date: Fri, 09 Jan 2004 05:44:37 GMT
Subject: python newbie
References: <3ffddcfd$0$16662$ba620e4c@news.skynet.be>
Message-ID: <9drLb.2088$Wa.188@news-server.bigpond.net.au>

"broebel" <computer.problemen at skynet.be> wrote in message
news:3ffddcfd$0$16662$ba620e4c at news.skynet.be...
> hey,
>
> I'm a newbie in the programming world.
> I just started and already I'm in a whole lot of problems.
>

And you'll probably experience a whole host more - welcome to the wonderful
world of programming ;) !!!

>
> first problem is the fact that I started out with a little program
> who was part of a course but the problem is when I launch
> the program. I don't have the time to see the result because
> the screen closes immediately.
>
> Can anyone explain what's happening.
>
<SNIP CODE>

You are obviously not launching the interpreter from a console window. Thus,
launching the interpreter forces a new console window to be opened, your
program executes, and it then closes because it has finished.

Possible remedies allowing you to view your program's output:

* Launch interpreter as you have been doing, but add a line
   such as:

       raw_input("Press a key to continue ")

   at the end of your code to prompt for a key press before
   exiting, and closing the console window

* Start using the intepreter from a console window i.e. start
   using the command line. All generated output will appear
   on the same console.

   Since you are in a course [?] I'd recommend asking your
   instructor about suitable tutorials for doing this

I hope this helps.

Anthony Borla




From __peter__ at web.de  Sun Jan  4 13:42:00 2004
From: __peter__ at web.de (Peter Otten)
Date: Sun, 04 Jan 2004 19:42:00 +0100
Subject: Launching pdb from within a script
References: <UNYJb.14065$Od5.5161@news-binary.blueyonder.co.uk>
Message-ID: <bt9mhl$9k2$06$1@news.t-online.com>

Graham Nicholls wrote:

> A year or so ago, I was given a really useful answer to a question posed
> here, which showed me how to start the debugger from withing a script.

Are you looking for pdb.set_trace()?

Peter


From tdelaney at avaya.com  Wed Jan 28 18:05:57 2004
From: tdelaney at avaya.com (Delaney, Timothy C (Timothy))
Date: Thu, 29 Jan 2004 10:05:57 +1100
Subject: PEP 326 is D-E-A-D (was Re: How does compare work?)
Message-ID: <338366A6D2E2CA4C9DAEAE652E12A1DE011DB0A3@au3010avexu1.global.avaya.com>

> From: Batista, Facundo
> 
> Aahz wrote: 
> #- >Even then, what about PEP 326, which presumes to define highest and 
> #- >lowest objects that can be compared with anything? 
> #- 
> #- What about it?  ;-) 
> #- 
> #- (Guido just posted a Pronouncement rejecting it.) 
> 
> Can't find it at http://www.python.org/doc/essays/pepparade.html 
> I'm looking in the wrong place? 

Yes - the PEP parade is *very* out of date, and is not maintained.

The pronouncement only occurred overnight (from my viewpoint) so you can't expect documents to be updated yet.

Basically, Aahz revealed the rejected status to c.l.python with his email.

Tim Delaney



From ciwwy at aol.com  Tue Jan 27 03:44:04 2004
From: ciwwy at aol.com (ciwwy at aol.com)
Date: Tue, 27 Jan 2004 01:44:04 -0700
Subject: Error
Message-ID: <0HS5007DV49QYB@csomail.cso.atmel.com>

test

-------------- next part --------------
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URL: <http://mail.python.org/pipermail/python-list/attachments/20040127/caf09488/attachment.txt>

From faizan at jaredweb.com  Tue Jan 27 20:39:42 2004
From: faizan at jaredweb.com (Fazer)
Date: 27 Jan 2004 17:39:42 -0800
Subject: Best way to compare a list?
Message-ID: <7b454334.0401271739.59267018@posting.google.com>

Hello,

I was wondering which would be the best way to compare a list?

I was thinking of just using a for loop and testing the condition.

What do you guys think?  The best/fastest way of comparing lists.

Thanks,

Faizan


From jussij at zeusedit.com  Sat Jan 24 00:10:20 2004
From: jussij at zeusedit.com (Jussi Jumppanen)
Date: Sat, 24 Jan 2004 16:10:20 +1100
Subject: C compilers
References: <X59Qb.20838$q4.11416@newsread3.news.atl.earthlink.net>
	<qjt210lr869li9fbvicurb39kfm2g0ahhu@4ax.com>
Message-ID: <4011FE3C.7BF2@zeusedit.com>

Patrick Useldinger wrote:
> 
> Borland C++ 5 - and it's free.

The Borland BCC Verison 5.5 c/c++ compiler is now almost
free (you need to supply some user details) and here is 
the link:

  http://www.borland.com/bcppbuilder/freecompiler

Jussi Jumppanen
Author of: Zeus for Windows, Win32 (Brief, Emacs, etc) FTP Text Editor
"The C/C++, Java, HTML, Python, Pascal, PHP, Perl programmer's editor"
Home Page: http://www.zeusedit.com


From peter at cendio.se  Wed Jan 28 05:42:38 2004
From: peter at cendio.se (Peter Astrand)
Date: Wed, 28 Jan 2004 11:42:38 +0100 (CET)
Subject: Cross-version extension modules?
In-Reply-To: <490316A24CC5D411ACD700B0D078F7F003915E29@cseexch01.cse.creoscitex.com>
Message-ID: <Pine.LNX.4.44.0401281138560.12588-100000@maggie.lkpg.cendio.se>

On Wed, 28 Jan 2004, Pieter Claerhout wrote:

> extension modules in Python are always linked to a specific version of
> Python. You might perform some tricks with writing a pure Python module
> about your extension that, based on the version of the python interpreter,
> loads a different version of your extension. This is e.g. the way the Python
> drivers for SapDB work.

Thanks. Is PYTHON_API_VERSION guaranteed to increase only when the Python 
major or minor version increases, or can it change between micro versions 
as well?


/Peter
> -----Original Message-----
> From: Peter Astrand [mailto:peter at cendio.se] 
> Sent: 28 January 2004 10:40
> To: python-list at python.org
> Subject: Cross-version extension modules?
> 
> 
> 
> If I build a extension module with Python 2.2 and then loads it with 2.3, 
> I get:
> 
> RuntimeWarning: Python C API version mismatch for module _foo: This
> Python has API version 1012, module _foo has version 1011.
> 
> How fatal is this? Is it safe to use the module anyway? If not, is it
> possible to build the module differently, so that it actually is safe to
> use it with different versions of Python?
> 
> 

-- 
Peter ?strand		www.thinlinc.com
Cendio			www.cendio.se
Teknikringen 3		Phone: +46-13-21 46 00
583 30 Link?ping




From inyeol.lee at siimage.com  Mon Jan 26 18:57:04 2004
From: inyeol.lee at siimage.com (Inyeol Lee)
Date: Mon, 26 Jan 2004 15:57:04 -0800
Subject: How does compare work?
In-Reply-To: <40158680$0$7044$ba620e4c@news.skynet.be>
References: <40158680$0$7044$ba620e4c@news.skynet.be>
Message-ID: <20040126235704.GD13453@siliconimage.com>

On Mon, Jan 26, 2004 at 10:28:31PM +0100, Helmut Jarausch wrote:
> Hi,
> 
> what does Python do if two objects aren't comparable (to my opinion)
> If I've understood "Python in a Nutschell" correctly it should raise an
> exception but it doesn't do for me.
> 

>From section 5.9 in Python 2.3.3 Reference manual;
"""
The operators <, >, ==, >=, <=, and != compare the values of two
objects. The objects need not have the same type. If both are numbers,
they are converted to a common type. Otherwise,
objects of different types always compare unequal, and are ordered
consistently but arbitrarily. 

(This unusual definition of comparison was used to simplify the
definition of operations like sorting and the in and not in operators.
In the future, the comparison rules for objects of
different types are likely to change.) 
"""

-Inyeol Lee



From alet at librelogiciel.com  Sun Jan 18 17:45:23 2004
From: alet at librelogiciel.com (Jerome Alet)
Date: Sun, 18 Jan 2004 23:45:23 +0100
Subject: ANN: PyKota v1.16 is out
Message-ID: <pan.2004.01.18.22.45.23.912862@librelogiciel.com>

Hi there

I'm pleased to announce that PyKota v1.16 Final is out.

PyKota is an entirely Python written, GNU GPLed, centralized, full
featured, internationalized, and easily extensible, print quota and
accounting solution for CUPS and LPRng under Unix like systems like
GNU/Linux.

PyKota can store its datas either in PostgreSQL or in OpenLDAP, and
integrating PyKota with an existing LDAP directory is really easy thanks
to PyKota's unprecedented flexibility.

After several months of developpment, this release includes many many
improvements :

  - New CUPS backend wrapper, which allows point & click
    installation into CUPS and supports device enumeration. The old pykota
    filter is now deprecated for use with CUPS, unless for dumb printers.
    This CUPS backend also allows immediate hardware accounting, instead
    of delayed by one job hardware accounting.
    WARNING : installation is still partially manual for CUPS 1.14
              (for example under Debian Woody)
    
  - Printers Groups are implemented and can be nested.
    See FAQ for explanations.
  
  - Printers and users can now be automatically added to the database
    on first print in a completely configurable way.
    
  - Six languages are now supported : English, French, Spanish,
    Portuguese, Brasilian Portuguese and Swedish.
    
  - Web interface is now partially internationalized.
  
  - Web interface can now display print jobs history per printer,
    per user, and per user+printer.
  
  - Preliminary documentation on how to use OpenOffice.org
    to create personnalized reports for PyKota + PostgreSQL.
          
  - Spanish installation guide for SuSe + CUPS + PyKota + PostgreSQL
    added to the documentation. Doesn't yet document v1.16 though. This 15
    pages guide was generously contributed to the project by Dennis Romero
    L.
    
  - User's email address can now be set at user creation time.
  
  - Improved database caching mechanism.
  
  - Several environment variables are now exported to accounters,
    requesters and mailers.
    
  - Includes a script to send email+winpopup message to users
    over quota.
    
  - Includes a script to wait for Appletalk printers being ready.
    
  - New option to automatically convert all usernames to lowercase.
    
  - Jobs history contains more fields than before.
  
  - Documentation is now licensed under the GNU GPL too (was GNU FDL).
  
  - Major code refactoring and cleaning.
  
  - Usual bug fixes.
  
The complete list of changes is available from :

  http://www.librelogiciel.com/software/PyKota/action_News
  
IMPORTANT : Before upgrading from an older version, please :

        - Double check the toplevel README and the FAQ.
        
        - Upgrade your PostgreSQL database or LDAP schema as
          explained in the initscripts/ directories, if needed.
          
        - Double check the sample configuration files for new
          options and features.
          
Learn more about PyKota, see live reports or screenshots, download the CVS
version or buy yearly Official Packages subscription from :

  http://www.librelogiciel.com/software/PyKota/action_Presentation

Chat with us, ask for help, report problems or successes, on the mailing
list at :

  http://cgi.librelogiciel.com/mailman/listinfo/pykota

Or through IRC :

        /server irc.freenode.net
        /join #pykota
        
Plans for next releases, unsorted :

    - Make LPRng support on-par with CUPS support again,
      allowing immediate hardware accounting for LPRng too.
    
    - Improve documentation.
    
    - Explore PyKota database + OpenOffice.org interactions.
    
    - Allow more ways to limit printing, like by combining
      page + balance quota for example (thanks Henrik !)
      
    - Web based administrative interface.
    
    - Allow to see the printers groups history too
      (actually only individual printers history is
       shown)
       
Thank you for reading.

Jerome Alet

-- 
"A non-free program is a predatory social system that keeps people 
in a state of domination and division, and uses the spoils to 
dominate more." - RMS


From tjreedy at udel.edu  Fri Jan  2 00:46:18 2004
From: tjreedy at udel.edu (Terry Reedy)
Date: Fri, 2 Jan 2004 00:46:18 -0500
Subject: NEWBIE: map | zip | list comp
References: <odv9vvgb4aobq4c617k0ju4plat2d81j0o@4ax.com>
Message-ID: <ApmdnZGzjJk4mGiiRVn-uA@comcast.com>


<engsolnom at ipns.com> wrote in message
news:odv9vvgb4aobq4c617k0ju4plat2d81j0o at 4ax.com...
> Hello again...hope everyone had a great New Year...:)
>
> In the quest to learn more about Python, I decided to create an arbitrary
sequence,
> then march each member through a 'field' of each of the members in turn,
and just to complicate it a
> bit, make the length of the field user defined.
> Hard to explain...an example might serve:
>
> 10000
> 01000
> 00100
>   .
>   .
> 00009
> 01111
> 10111
> 11011
>   .
>   .
> 21111
> 12111
> 11211
> and so forth.
>
> The only coding I could come up with is:
>
> base_seq = 'ABCD'
> length = 6
>
> for char_1 in base_seq:                          # Loop thru the set
char_1 at a time
>     for char_2 in base_seq:                     # Loop thru the seq again
for each char_1
>         if char_2 == char_1: continue         # Don't march 'A' thru a
field of 'A's
>         for ix in range(length):                     # Now march char_2
thru a field of char_1's
>             print (char_1 * length)[:ix] + char_2 + (char_1 *
length)[ix:-1]

Move the constant char_1*length outside of the two inner loops, or else
multiple by the actual needed length instead of making too much and
slicing.

>
> which, as you can see, has three nested FOR loops. I played with map, zip
and list comps a bit, but
> couldn't figure out how to compress the above code.

You mean something like (untested):

[char_1*ix + char_2 + char_1*(length - ix -1) for char_1 in base_seq
  for char_2 in base_seq if char_1 != char_2 for ix in range(length)]

> Am I barking up the wrong Python tree?

I think so.  Consider how long it took you to write clear conprehensible
code using Python's significant indentation *feature* and how long it took
you to not successfully get rid of it and how long it took you to convince
yourself that my no-indent perversion produces the same items (though in a
list), if indeed it does.  In my view, expressions should be only as long
as can be grokked in one mental gulp, and I think above overdoes it a bit.
Of course, the humancode quality can be restrored by writing it more
clearly as

[char_1*ix + char_2 + char_1*(length - ix -1)
    for char_1 in base_seq
        for char_2 in base_seq
            if char_1 != char_2
               for ix in range(length)]

in which case one has just moved the last line to the top and avoided
result=[] and result.append().

Terry J. Reedy




From jzgoda at gazeta.usun.pl  Tue Jan 13 16:11:11 2004
From: jzgoda at gazeta.usun.pl (Jarek Zgoda)
Date: Tue, 13 Jan 2004 21:11:11 +0000 (UTC)
Subject: id3v2 module
References: <pan.2004.01.13.09.12.39.813880@beeznest.NOSPAM.net>
	<pan.2004.01.13.20.14.20.783863@freenet.de>
Message-ID: <bu1mtf$nm$1@atlantis.news.tpi.pl>

Guido Schimmels <guido.schimmels at freenet.de> pisze:

>> I'd like to know if there is a third-party module for reading/writing
>> id3v2 informations.
>> Thanks
> 
> http://id3-py.sourceforge.net/

This one is able to read and write only ID3v1.1 tags.

-- 
Jarek Zgoda
Unregistered Linux User #-1
http://www.zgoda.biz/ JID:zgoda-a-chrome.pl http://zgoda.jogger.pl/


From usenet at -OBFUSCATED-joefrancia.com  Fri Jan  9 01:21:00 2004
From: usenet at -OBFUSCATED-joefrancia.com (Joe Francia)
Date: Fri, 09 Jan 2004 06:21:00 GMT
Subject: python newbie
In-Reply-To: <UilLb.1570$nt4.1692@attbi_s51>
References: <3ffddcfd$0$16662$ba620e4c@news.skynet.be>
	<5unrvv8u1vpske1j464epj4aff0f54k2nf@4ax.com>
	<UilLb.1570$nt4.1692@attbi_s51>
Message-ID: <gLrLb.5136380$Of.812373@news.easynews.com>

d wrote:
> Worked fine for me on Linux... made two suggested changes: 1) use
> raw_input(), not input(), 2) check user input for errors. Sorry, I don't
> know how to say "Enter a number between 0 and 500" in whatever language
> this is in (German?)
> 

You're a Python user and you don't recognize Dutch?!?!  For shame... ;>)


From Kyler at news.Lairds.org  Tue Jan 20 13:12:06 2004
From: Kyler at news.Lairds.org (Kyler Laird)
Date: Tue, 20 Jan 2004 18:12:06 GMT
Subject: Do (USA) Python conferences require a coast?
Message-ID: <6b50e1-goo.ln1@jowls.lairds.org>

In 2001 I attended the Python conference in Long Beach, CA.  I
had just decided that Python was something I should use and the
conference provided me a (well-fitted) brainful of good insight.
	http://lairds.org/Kyler/photos/disk0019/img_0421.jpg/image_viewer

Now I use Python constantly.  I'd like to get face-to-face with
Python experts so that I can better understand complex pieces
and discover new tools.  I want to attend another conference.

It looks like PyCon
	http://pycon.org/
is always in Washington, DC.  I try to avoid DC.

Python10
	http://www.python10.org/
is also essentially in DC (Alexandria, VA).

Even the Plone conference (New Orleans) was on a coast.  Do
Python users always have to be "on edge"?

Does anyone consider hosting a Python conferences in cheaper/
safer/freer/more central locations?  (Say...Indianapolis?)  I
see that there are some Python intros in Longmont, Colorado.
	http://www.python.org/community/events.html
That'd be a dandy location for a conference too.  (It's been
awhile since I visited Estes Park.)

Thank you.

--kyler


From aahz at pythoncraft.com  Mon Jan  5 12:35:45 2004
From: aahz at pythoncraft.com (Aahz)
Date: Mon, 5 Jan 2004 12:35:45 -0500
Subject: REMINDER: BayPIGgies Jan 8: Python Threads
Message-ID: <20040105173544.GA1029@panix.com>

The next BayPIGgies meeting is this Thursday, January 8, 2004, 7:30pm

Aahz will be presenting a talk on Python threads.

BayPIGgies meetings are held at Stanford, California.  For more
information, see http://www.baypiggies.net/
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

A: No.
Q: Is top-posting okay?



From andy at reportlab.com  Sat Jan 31 18:28:18 2004
From: andy at reportlab.com (Andy Robinson)
Date: Sat, 31 Jan 2004 23:28:18 -0000
Subject: Python vacancies at ReportLab, London
Message-ID: <PGECLPOBGNBNKHNAGIJHCECOJCAA.andy@reportlab.com>

ReportLab develop enterprise reporting solutions using
cutting-edge Python technology, and have a growing
business with an excellent blue chip customer base. You
may also know us from our open source PDF and graphics
library....

We are looking for two positions with immediate effect:

(1) Trainee I.T. consultants working in our solutions team
Full time junior positions based in our London office.


(2) Technical Writer / Marketeer / Evangelist
A dual role maintaining documentation and writing articles,
press releases and web content to promote the company.
Either a junior full time position in our London office,
or a remote part-time role for an experienced writer.

Full details are at http://www.reportlab.com/careers.html
Please use the vacancies address there; don't contact me
directly.

Best Regards,

Andy Robinson
CEO/Chief Architect
ReportLab Europe Ltd.
mobile +44-7976-355742
office +44-20-8544-8049
 



From try_vanevery_at_mycompanyname at yahoo.com  Thu Jan 15 00:20:11 2004
From: try_vanevery_at_mycompanyname at yahoo.com (Brandon J. Van Every)
Date: Wed, 14 Jan 2004 21:20:11 -0800
Subject: The GPL / BSD cultural divide (was ProtoCiv: porting Freeciv to
	Python CANNED)
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<n22Nb.11299$9k7.210522@news.xtra.co.nz>
	<bu2pgs$d123a$1@ID-207230.news.uni-berlin.de>
	<4004EC9E.1E2E2893@alcyone.com> <bu3iv2$n2u$4@tyfon.itea.ntnu.no>
	<bu4dii$daqjq$1@ID-207230.news.uni-berlin.de>
	<slrnc0bg61.3p2.me@localhost.localdomain>
Message-ID: <bu578m$di0d8$1@ID-207230.news.uni-berlin.de>


"James Keasley" <me at privacy.net> wrote in message
news:slrnc0bg61.3p2.me at localhost.localdomain...
> In article <bu4dii$daqjq$1 at ID-207230.news.uni-berlin.de>, Brandon J. Van
Every wrote:
>
> > Agreed, and more specifically, there is a huge *cultural divide* between
> > most OSS developers and proprietary commercial developers who simply
want to
> > add some OSS "to get the boring bits over with."
>
> Yeah, it indicates that you are a lazy cunt who wants to get something for
> nothing,

Wow, isn't *that* a sophisticated business model.  Call me so impressed.

> if you want to use someone elses work that you haven't commissioned
> from them, find what you want from someone who isn't fussed, and has used
the
> BSD license, people who have used the GPL have done so cos they *don't*
> want some software company ripping off their hard work and not
contributing
> anything back.

Here's my attitude towards free software:

- if you are going to give something away, give it away completely.
- if it's too valuable to give away, don't.
- software, in general, is not supposed to be free.
- we save labor when "the boring bits" are free.
- ergo, give your boring bits to the common good.  Keep the interesting /
valuable stuff for yourself.

-- 
Cheers,                     www.indiegamedesign.com
Brandon Van Every           Seattle, WA

20% of the world is real.
80% is gobbledygook we make up inside our own heads.



From mxlaym009 at nospam_hotmail.com  Sun Jan 11 17:49:34 2004
From: mxlaym009 at nospam_hotmail.com (M. Laymon)
Date: Sun, 11 Jan 2004 22:49:34 GMT
Subject: Python installation breaks Outlook Express
Message-ID: <t2k3001mc170t3vdkk7f0mftcjlptkdo6a@4ax.com>

I just installed Python 2.3.3 under Windows XP professional.   After I
did, my wife tried to access her email using Outlook Express and got
the error messages:

Your server has unexpectedly terminated the connection. Possible
causes for 
this include server problems, network problems, or a long period of
inactivity. 
Account: 'incoming.verizon.net', Server: 'outgoing.verizon.net', 
Protocol: SMTP, Port: 25, Secure(SSL): No, Error Number: 0x800CCC0F

Your server has unexpectedly terminated the connection. Possible
causes for this 
include server problems, network problems, or a long period of
inactivity. 
Account: 'incoming.verizon.net', Server: 'incoming.verizon.net',
Protocol: POP3, 
Port: 110, Secure(SSL): No, Error Number: 0x800CCC0F

 (No comments about Outlook, please.I have tried to get her to use a
different email program, but she likes Outlook.)   I checked the
settings, then recreated her account in Outlook, but nothing worked.
My Mozilla Thunderbird email client worked fine.

Since the only thing I had done recently was to install Python.  I
used system restore to go back to the point before installing Python.
After I did, Outlook started working again.  Has anyone else seen this
behavior ?

Thanks.

M. Laymon


From Pieter.Claerhout at Creo.com  Wed Jan 28 09:26:49 2004
From: Pieter.Claerhout at Creo.com (Pieter Claerhout)
Date: Wed, 28 Jan 2004 15:26:49 +0100
Subject: Simple Database Package
Message-ID: <490316A24CC5D411ACD700B0D078F7F003915E2F@cseexch01.cse.creoscitex.com>

Take a look at:
MetaKit: http://www.equi4.com/metakit/
SQLite: http://www.sqlite.org/

Cheers,


pieter

Creo
pieter claerhout | product support prinergy | tel: +32 2 352 2511 |
pieter.claerhout at creo.com | www.creo.com

IMAGINE CREATE BELIEVE(tm)


-----Original Message-----
From: michael at foord.net [mailto:michael at foord.net] 
Sent: 28 January 2004 15:23
To: python-list at python.org
Subject: Simple Database Package


I'm looking to build a simple database application for use on the
desktop (customer contact and feedback database).

Anyone able to reccomend a simple module / package I can use...  ?
I've never done any database work before and am ken to learn - but
most of the ones I've seen seem to rely on a database engine buit into
a server.. I need a simple stand alone engine. Of course I could just
build the functions I need - but that would be a bit of a waste and
not so extendable........

Thanks in advance for your help.

Fuzzy

fuzzy man AT atlantibots DOT org DOT uk

-- 

http://www.Voidspace.org.uk The Place where headspace meets
cyberspace. Online resource site - covering science, technology,
computing, cyberpunk, psychology, spirituality, fiction and more.

--- 

http://www.voidspace.org.uk/atlantibots/pythonutils.html
The home of Python dateutils - dateutils, ConfigObj, StandOut,
CGI-News etc
-- 
http://mail.python.org/mailman/listinfo/python-list



From mwilson at the-wire.com  Tue Jan 27 11:56:14 2004
From: mwilson at the-wire.com (Mel Wilson)
Date: Tue, 27 Jan 2004 11:56:14 -0500
Subject: Ordered dictionary?
References: <leWPb.231$af7.162835@newshog.newsread.com>
	<f7XPb.9179$7D.3428@fe2.texas.rr.com>
	<99dce321.0401231546.5f73d721@posting.google.com>
Message-ID: <ugpFAls/Kr2H089yn@the-wire.com>

In article <99dce321.0401231546.5f73d721 at posting.google.com>,
dw-google.com at botanicus.net (David M. Wilson) wrote:
>"Paul McGuire" <ptmcg at users.sourceforge.net> wrote...
>
>> If you really need to access the dictionary in sorted key order, is this so
>> difficult?
>
>That was not the original poster's question. Order is semantic
>information which a dictionary does not record or represent in any
>way.

Wants order of insertion.  Best I can think of is



class OrderedDict (dict):
    "Retains order-of-insertion in the dictionary"
    def __setitem__ (self, key, value):
        dict.__setitem__ (self, key, (len (self), value,) )

    def __getitem__ (self, key):
        return dict.__getitem__ (self, key)[1]

    def ordered_items (self):
        i = [(v, k) for (k, v) in self.items()]
        i.sort()
        return [(k, v[1]) for (v, k) in i]

# end class OrderedDict

if __name__ == '__main__':
    D = OrderedDict()
    D['oranges'] = 41
    D['lemons'] = 22
    D['limes'] = 63

    print D
    print D.ordered_items()



   Possibly other refinenemts:  __init__ that inserts from a
sequence of 2-tuples, keeping a sequence number as a class
attribute instead of using len, etc.

        Regards.        Mel.


From webmaster at beyond-thoughts.com  Mon Jan 12 17:05:49 2004
From: webmaster at beyond-thoughts.com (Christoph Becker-Freyseng)
Date: Mon, 12 Jan 2004 23:05:49 +0100
Subject: Immutable Proxy-Class, "Pseudo freeze(obj)"
Message-ID: <40031A3D.2070408@beyond-thoughts.com>

Hello,

There are many cases where you have a mutable object and would like to 
use its __hash__-method (e.g. use it as key for a dict). Of course a 
mutable class should not define __hash__ because it doesn't make much 
sense if the object can change.

However you could define the class Immutable (if you mind about 
isinstance you can define a special __new__ ...) that is effectivly a 
proxy for the object given the constructor so it passes all accesses to 
the real object. But it defines a __hash__ method. This return a 
hash-value calculated when the Immutable-instance has been created. Each 
time there is an access to the underlying real object the proxy checks 
if the newly-calculated hash-value and the old one (calculated on 
instantiation) are different before and after access. If they are 
different it will raise an Exception.
Since there is no way to prevent someone to keep a reference to the 
original/real object obj it is not possible to avoid changing this 
object. But then if the Immutable(obj)-instance is accessed the 
hash-value will have changed. Thus causing an Exception.

One problem I see is that you can't find out where such an "illegal 
operation" happened. You just see when the Immutable-instance is access 
and it fails.
On the other hand if the Immutable-instance isn't accessed anymore 
changing the original object is no problem.


What do you think?
Badstyle?
Handy?
...


Thanks,
    Christoph Becker-Freyseng


PS:
Some links on similar subjects:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/159143    ASPN : 
Python Cookbook : A ThreadedProxy wrapper

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/198078
ASPN : Python Cookbook : Wrapping method calls (meta-class example)

http://www.python.org/doc/current/ref/customization.html
3.3.1 Basic customization

http://www.python.org/search/hypermail/python-recent/0556.html
Python Archive (recent): freezing structures.

http://gpk.wftp.org:8082/sets.html
Python: module sets







From heavens7s at hotmail.com  Wed Jan 28 13:49:15 2004
From: heavens7s at hotmail.com (Joe)
Date: 28 Jan 2004 10:49:15 -0800
Subject: getting files over ftp
Message-ID: <560d84ab.0401281049.18d377f3@posting.google.com>

How can you grab files over an ftp connection using ftplib?  I can
make the connection, browse to the directory, view directory, but
can't copy over the files.

Thanks


From t-meyer at ihug.co.nz  Wed Jan 21 03:41:46 2004
From: t-meyer at ihug.co.nz (Tony Meyer)
Date: Wed, 21 Jan 2004 21:41:46 +1300
Subject: Installing SpamBayes
In-Reply-To: <1ED4ECF91CDED24C8D012BCF2B034F1304BA3CD2@its-xchg4.massey.ac.nz>
Message-ID: <1ED4ECF91CDED24C8D012BCF2B034F1304677860@its-xchg4.massey.ac.nz>

[example of using "cd" snipped]
> I hope that is enough of an example for you to figure out 
> what is going on. As to which path you need to change to, it 
> is wherever you decided to uncompress Spambayes.
[...]
> If this isn't enough, then Jeebus help you.

Or if Jeebus isn't available, then the OP could try the experimental binary
installer for SpamBayes, which includes all that's necessary to use
SpamBayes with Outlook Express.  If the OP can't manage the install process,
then they're probably better off with the binary, anyway.

<http://starship.python.net/crew/mhammond/spambayes>

=Tony Meyer




From jepler at unpythonic.net  Thu Jan 29 10:19:47 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Thu, 29 Jan 2004 09:19:47 -0600
Subject: regexp upward compatibility bug ?
In-Reply-To: <bvb7bb$2hr8$1@biggoron.nerim.net>
References: <bvb7bb$2hr8$1@biggoron.nerim.net>
Message-ID: <20040129151947.GC18498@unpythonic.net>

The problem is the use of '-' in the character groups, like
    r'[\w-]'

Here's what the library reference manual has to say:
[]
    Used to indicate a set of characters. Characters can be listed
    individually, or a range of characters can be indicated by giving
    two characters and separating them by a "-". Special characters are
    not active inside sets. For example, [akm$] will match any of the
    characters "a", "k", "m", or "$"; [a-z] will match any lowercase
    letter, and [a-zA-Z0-9] matches any letter or digit. Character
    classes such as \w or \S (defined below) are also acceptable inside
    a range. If you want to include a "]" or a "-" inside a set, precede
    it with a backslash, or place it as the first character. The pattern
    []] will match ']', for example.
           http://www.python.org/doc/current/lib/re-syntax.html

So you may want to write r'[-\w]' or r'[\w\-]' instead, based on my
reading.

The same goes for the later part of the pattern [\w-\.?=].

Jeff



From paul at prescod.net  Fri Jan 23 20:04:23 2004
From: paul at prescod.net (Paul Prescod)
Date: Fri, 23 Jan 2004 17:04:23 -0800
Subject: [OPINION] - does language really matter if they all do
	the	samething?
In-Reply-To: <028FD9F0-4E01-11D8-BB78-0003934ACDEC@zdome.net>
References: <69A0D4AB81C51447AD6BA387782B8D64093D8A@midl-mail4.etcconnect.com>
	<028FD9F0-4E01-11D8-BB78-0003934ACDEC@zdome.net>
Message-ID: <4011C497.1040302@prescod.net>

Dietrich Epp wrote:
> 
>...
> 
> 
> <abestos>
> Python seems to take the middle ground.  It's build from a procedural 
> standpoint, in an environment where most things are objects and some are 
> functions.  It's not what I'd choose as an example of an object oriented 
> language.  There are no messages, only function calls, so you can't 
> capture them. 

That's certainly not true. Take a look at how the XML-RPC libraries 
work. They capture "messages" sent from the program to the proxy object, 
reify them as XML "messages" sent across the network and then turned 
back into function calls applied to objects.

  The plus side is that methods behave exactly the same as
> functions, this makes the language simple and the two ideas 
> interchangeable.  You can set an object's method to a function.  The 
> minus side is that the paradigm of sending a message "to" an object 
> doesn't exist, and anyone coming from Smalltalk or even Objective-C 
> might miss that and feel constrained (I did).  But if Python were really 
> object-oriented like that, then it wouldn't have Python's simplicity any 
> more.
> </abestos>

I would appreciate an example of something you would do by capturing a 
message that cannot be done in Python.

I rather wonder if you've illustrated the downside of flitting from 
language to langauge. You may think you're using a language to capacity 
without actually doing so. I could be wrong but perhaps even the tasks 
you turn to Lisp or Perl for may have easy equivalents in Python.

  Paul Prescod




From peter at engcorp.com  Mon Jan  5 17:28:30 2004
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 05 Jan 2004 17:28:30 -0500
Subject: intellectual property agreements and open source . was - Re:
 Why does this fail? [2]
References: <vvhdlm72386b3c@corp.supernews.com>
	<vvhkngs7oachad@corp.supernews.com>
	<84fc4588.0401042209.60cdb724@posting.google.com>
	<vvi2i8b89928fa@corp.supernews.com>
Message-ID: <3FF9E50E.C6AE7E21@engcorp.com>

Dave Murray wrote:
> 
> After re-reading this part, I can see that it is an idea that I like. How
> does participating in open source work for someone (me) who has signed the
> customary intellectual property agreement with the corporation that they
> work for? Since programming is part of my job, developing test solutions
> implemented on automatic test equipment (the hardware too) I don't know if I
> would/could be poison to an open source project. How does that work? I've
> never participated. If all the work is done on someone's own time, not using
> company resources, yadda-yadda-hadda-hadda, do corporate lawwwyaahhhs have a
> history of trying to dispute that and stake a claim? No doubt, many of you
> are in the same position.

My own agreement, which is not quite as archaic in restricting me as some I've
seen, boils down to saying that if I work on something that is either (done 
on company time or with company resources) OR (relates to the current or 
likely future business of the company) then I'm agreeing that the company 
in effect gets an exclusive right to whatever it is.

If, on the other hand, it's on my own time AND does not involve what the
company's business is (in contrast to, say, simply relating to tools that 
they might use within the business), then they don't get any right to it.
We use various test tools at work, but just because I work on a similar 
open source test tool doesn't mean the company has any exclusive right to it.
We sell RF stuff, not test tools, so test tools are not the company's 
business, nor are they likely ever to be...

I believe many or most agreements these days boil down to the same thing,
but of course your own might not so reading it would be a good idea.  

Generally there is lots of boilerplate legalese but it surrounds one or
two key paragraphs of fairly simple English with the essence described above, 
and it's not as hard to dig the key ideas out as it might seem at first glance.

-Peter


From ken at perfect-image.com  Sat Jan 31 22:25:07 2004
From: ken at perfect-image.com (Ken Godee)
Date: Sat, 31 Jan 2004 20:25:07 -0700
Subject: wxPython documentation
In-Reply-To: <30260531.0401311835.2246510f@posting.google.com>
References: <401c25a3$0$11357$636a55ce@news.free.fr>	<mailman.1084.1075587380.12720.python-list@python.org>
	<30260531.0401311835.2246510f@posting.google.com>
Message-ID: <401C7193.2060009@perfect-image.com>

simo wrote:
> Jonathan Daugherty <cygnus at cprogrammer.org> wrote:
> 
> 
>>>Where could I find a good documentation about wxPython (a documentation
>>>which is not for C++ !!!)
> 
> 
>>There are some wxpython tutorials and documents but the official wxPython
>>documentation is the wxWindows documenation itself -- wxPython notes are
>>sprinkled throughout.
> 
> 
> This is what I found off-putting about PyQt - the documentation
> basically points you to the Qt C++ docs:
> 

I find Qt's c++ Doc's to be a great/complete set of documents.
In a very short period of time one can just look at the c++ docs
and know how to convert it to PyQt.

But....If one finds it to confusing, "www.thekompany.com" sells
a set of "Qt c++" docs converted to "PyQt", I think they get about 
$15.00 bucks for it or/and it's included with Blackadder.





From zunbeltz at wm.lc.ehu.es.XXX  Mon Jan 26 10:17:21 2004
From: zunbeltz at wm.lc.ehu.es.XXX (Zunbeltz Izaola)
Date: 26 Jan 2004 16:17:21 +0100
Subject: unittest
References: <cthu12j9id5.fsf@lcpxdf.wm.lc.ehu.es>
	<mailman.797.1075127834.12720.python-list@python.org>
Message-ID: <cthoesqage6.fsf@lcpxdf.wm.lc.ehu.es>

Tnaks, why is this so?

zunbeltz

Skip Montanaro <skip at pobox.com> writes:

>     Zunbeltz> class KnowValues(unittest.TestCase):
> 
>     Zunbeltz>     KnownRotationMatrices = [
>     Zunbeltz>         ((Rotational3Part([[-1,0,0],[0,1,0],[0,0,-1]])),
>     Zunbeltz>         (1, -1, 2, matrix.vector([0,1,0])))
>     Zunbeltz>         ]
> 
>     Zunbeltz>     def TestRotationalPartdeterminant(self):
>     Zunbeltz>         """ RotationalPart. determinant with known values."""
>     Zunbeltz>         for i in  self.KnownRotationMatrices:
>     Zunbeltz>             det = i[0].determinant()
>     Zunbeltz>             self.assertEqual(det,i[1][0])
> 
> 
>     Zunbeltz> if __name__ == "__main__":
>     Zunbeltz>    unittest.main()
> 
>     Zunbeltz> but when i run this scrip i get the following output
> 
>     ...
> 
> Try renaming your test case method "test_rotational_partdeterminant".
> 
> Skip


From fnord at u.washington.edu  Sat Jan  3 23:44:26 2004
From: fnord at u.washington.edu (Lonnie Princehouse)
Date: 3 Jan 2004 20:44:26 -0800
Subject: Project dream
References: <cb035744.0312261236.11d785ac@posting.google.com>
Message-ID: <f70e3538.0401032044.46de5bf4@posting.google.com>

I keep thinking that a good graph module would be really handy (as in
nodes and edges, not plotting), with the ability to traverse and
manipulate graphs in nice Pythonic ways, as well as implement some
basic graph theory (finding cycles, paths, cliques, etc).  I've
started writing one, but it's nowhere near completion.


From max at alcyone.com  Mon Jan 12 05:15:20 2004
From: max at alcyone.com (Erik Max Francis)
Date: Mon, 12 Jan 2004 02:15:20 -0800
Subject: building strings with variable input
References: <pduMb.6321$g4.137247@news2.nokia.com>
Message-ID: <400273B8.E991F41D@alcyone.com>

Olaf Meyer wrote:

> Especially if you have a lot of variable input it makes it hard to
> match
> the variables to the proper fields. From other scripting languanges
> I'm
> used to something like:
> 
>   $cmd = "$executable -start $startTime -end $endTime -dir $directory"
> 
> This makes it very easy to see how the string is actually built. You
> dont't have to worry where which variables go.
> 
> Is there a similar way to do this in python?

Sure:

cmd = "%(executable)s -start %(startTime)s -end %(endTime)s -dir
%(directory)s" % locals()

There are also more expansive solutions such as YAPTU or EmPy.

Note, however, that what you are trying to do (presuming you're passing
this to os.system or something similar) is potentially a serious
security risk.  If the values of the strings you are constructing the
command line are not fully trustworthy, they can be easily manipulated
to make your program execute arbitrary shell commands.

-- 
 __ Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
/  \ San Jose, CA, USA && 37 20 N 121 53 W && &tSftDotIotE
\__/ In the fight between you and the world, back the world.
    -- Frank Zappa


From a at a.invalid  Thu Jan  8 18:25:15 2004
From: a at a.invalid (Timo Virkkala)
Date: Fri, 09 Jan 2004 01:25:15 +0200
Subject: Cheetah - Test suite failures
In-Reply-To: <btknev$6e6$1@nyytiset.pp.htv.fi>
References: <btk7rt$7tq$1@nyytiset.pp.htv.fi>
	<f8kLb.5017838$Id.803326@news.easynews.com>
	<btknev$6e6$1@nyytiset.pp.htv.fi>
Message-ID: <btkosr$7e5$1@nyytiset.pp.htv.fi>

Just to put info here, in case someone else has the same problem:

Before seeking help on the Cheetah mailing list, I browsed through the 
last couple of months of posts there, and apparently the test suite just 
doesn't work properly on Windows. It seems that the major functions of 
Cheetah work fine, but there's problems with the test suite.

--
Timo Virkkala


From nopa90 at msn.com  Sat Jan 17 01:31:49 2004
From: nopa90 at msn.com (maxwell hammer)
Date: Sat, 17 Jan 2004 06:31:49 +0000
Subject: Wrapper to speex and ffmpeg library
Message-ID: <BAY3-F25ZUZzZPOY2ou000131ed@hotmail.com>

Anyway make a wrapper to speex library (different from the otherone someone 
else make)

Make wrapper for ffmpeg or the libavcodec part atleast

You can find them here

http://www.jjanecek.ca.tf

_________________________________________________________________
Protect your PC - get McAfee.com VirusScan Online  
http://clinic.mcafee.com/clinic/ibuy/campaign.asp?cid=3963




From claird at lairds.com  Wed Jan 14 15:56:02 2004
From: claird at lairds.com (Cameron Laird)
Date: Wed, 14 Jan 2004 20:56:02 -0000
Subject: Terminal Emulation with IBM ES9672 mainframe via multiplexer.
References: <mailman.330.1074022126.12720.python-list@python.org>
Message-ID: <100bb7231sighd6@corp.supernews.com>

In article <mailman.330.1074022126.12720.python-list at python.org>,
 <vidiv at gmx.net> wrote:
>Hi All, 
>
>Sorry for repeating, in the earlier msg i forgot to add a Subject line !! 
>
>I am a student-newbie to Python-List (for that matter Python language)
>working on a project for Terminal Emulation. The dumb terminal interacts
>with an
>IBM ES9672 mainframe through a 'multiplexer-MUX'. 
>The s/w is currently running in 'C' on a Windows NT environment and the
>requirement is to introduce Object Oriented concepts and C++ was the obvious
>choice, but i came across  'Python' (and also Perl, Ruby, ..etc) after i
>installed RH8 on my PC last month. We are actively canvassing the advantages
>of GNU
>s/w and philosophy and would like to simultaneously port it to GNU/Linux
>platform.
>
>I have read some of the documentation in Python.
>Before using Python as our project language it would be useful to know
>whether Python has functions, libraries/headers (like C does) capable of
>handling
>the foll. :
>
>1] open and close serial ports,
>2] set baud rates,
>3] check parity bit/byte,
>4] stop bits,
>5] Hardware handshaking,
>6] selection of port,......
>
>Our existing 'C' code is to be ported to the GNU/Linux platform so we are
>actively looking at an OOP concept. The part for serial port communication
>in
>C++ has classes so its easier to write customized programs to do most of the
>above. 
>
>Most importantly compatibility issues with the existing Multiplexer and
>Cisco Routers have to be kept in mind as the company will *not* make any H/W
>changes. 
>
>We saw that python has some routines for using existing C code, so we dont
>have to rewrite everything and can make modules containing functions and use
>it to operate on files. 
>Does it provide any other serial port communication features ?
>It would be nice if anyone could throw some light on some of the above
>issues.
			.
			.
			.
Yes, Python can do all this.

Although perhaps not as well as other approaches.  I don't understand
your description.  You have something that "works", now, and you want
... well, I'm not sure what you want.  Is the software you're looking
to change the terminal emulator, or the MUX?  I think it's the former.
What's the relation of the new software and the software it's
replacing?  Are they supposed to have the same design?  Would it be
easier for you to do object-oriented analysis and design, then imple-
ment in C (while C isn't a particularly inviting language for OO, it
*is* possible to use it)?  Is the terminal emulator connecting to a
mainframe, or routers, or both?  Is it enough for you just to exhibit
one of the many free-software terminal emulators available?  When *I*
work in this area, I certainly start with as much re-use as possible.

Perhaps I'm not following the academic spirit of this assignment.  It
sounds as though you have settled on construction of certain low-level
serial-line capabilities in C++, and one of your requirements is to
interface with that (as yet uncoded?) specific library.  Do I have 
that right?

Boost is a nice way to use Python and C++ together.

Expect <URL: http://wiki.tcl.tk/expect > is *very* widely used by 
those working with terminal emulation, serial-line connections,
networking hardware, and so on.  Perhaps Expect is exactly what you
lack; I really can't tell.  There's a Python-based Expect, although
it's not as well documented as the original one.

Is the point of this to construct working software, or learn OO, or
port to Linux, or ...?  Or all of the above?
-- 

Cameron Laird <claird at phaseit.net>
Business:  http://www.Phaseit.net


From skip at pobox.com  Thu Jan 29 10:24:54 2004
From: skip at pobox.com (Skip Montanaro)
Date: Thu, 29 Jan 2004 09:24:54 -0600
Subject: mod_speling for python
In-Reply-To: <9d1c4d6d.0401282106.d69b2c5@posting.google.com>
References: <9d1c4d6d.0401282106.d69b2c5@posting.google.com>
Message-ID: <16409.9670.680122.128304@montanaro.dyndns.org>


    prtk3> ... if there is a NameError exception, python walks the globals()
    prtk3> and locals() to see if it might be just a minor
    prtk3> spelling/capitalization error.

    prtk3> I can see how this might be done for ImportErrors, using ihooks
    prtk3> or iu, but I don't see how to do it for NameErrors. The python
    prtk3> compiler module doesn't seem to be the answer.

    prtk3> I know there are drawbacks, disadvantages, this is "evil", etc.
    prtk3> I only wanted to know what ways there are to add such a hook if
    prtk3> it is possible without altering the C source for python itself.

Take a look at sys.excepthook.  Actual implementation is left as an exercise
for the reader. <wink>

Skip



From merkosh at hadiko.de  Tue Jan 20 20:06:33 2004
From: merkosh at hadiko.de (Uwe Mayer)
Date: Wed, 21 Jan 2004 02:06:33 +0100
Subject: always the same object (2)
References: <bukg9s$6e7$1@news.rz.uni-karlsruhe.de>
Message-ID: <bukjao$arq$1@news.rz.uni-karlsruhe.de>

Uwe Mayer wrote:

Thanks for all the responses. As John Roth <newsgroups at jhrothjr.com> wrote
in <100rgj1etbcqr9d at news.supernews.com>:

> class DataWrapper():
>         data = { } 
>         def __init__(self, arg): #arg will contain a tuple
>                 data['var1'], data['var2'] = arg

the "data" variable is a class variable and shared by all DataWrapper,
therfore:

> result = [ ]
> while not <end-of-file f>:
>         data = struc.unpack("4s4s", f.read(8))
>         record = DataWrapper( data ) # pass tuple from unpack
>         result.append( record )

all "record"s in "result" share the same instance and thus all the data gets
overwritten. :)

Moving "data" into __init__() in DataWrapper does the trick.

Thanks again
Ciao
Uwe     


From mwh at python.net  Mon Jan 12 07:09:23 2004
From: mwh at python.net (Michael Hudson)
Date: Mon, 12 Jan 2004 12:09:23 GMT
Subject: Division oddity
References: <ssn3009029rrug3l8dk1pn06tqd019ucld@4ax.com>
	<7xeku5vrn8.fsf@ruckus.brouhaha.com>
	<5d83790c.0401120125.7d186102@posting.google.com>
Message-ID: <m3y8sdz7v1.fsf@pc150.maths.bris.ac.uk>

python at rcn.com (Raymond Hettinger) writes:

> [Tim Rowe]
> > > If I do from __future__ import division then eval(1/2) gives me 0.5 as
> > > expected. But if I do print input("enter a sum: ") and enter 1/2 as
> > > the sum I get 0 as if I hadn't done the import.  I thought input was
> > > supposed to give the same behaviour as an eval on raw input -- why the
> > > difference here?
> 
> [Paul Rubin[
> > The input function is calling eval from the context of the module
> > where 'input' itself is defined.  If you use "from __future__ import
> > division" in module A and have "print 3/2" in module B, the value of
> > 3/2 in module B shouldn't be affected by the input, since module B
> > may depend on integer division having the old behavior.
> 
> Right!
> 
> So, the way to get eval() to respond to the import is to pass along
> the current environment:
> 
> >>> from __future__ import division
> >>> eval('9/2', globals())
> 4.5

Um, that's not how it works.  Off the top of my head I'm not entirely
sure why eval() respects future statements and input() does not, but
it's probably easy enough to fix, if anyone cares (I don't think I
do).

Cheers,
mwh

-- 
  Windows 2000: Smaller cow. Just as much crap.  -- Jim's pedigree of
  operating systems, asr


From john.abel at pa.press.net  Fri Jan 23 09:02:53 2004
From: john.abel at pa.press.net (John Abel)
Date: Fri, 23 Jan 2004 14:02:53 +0000
Subject: Sending Through ^] Through telnetlib
Message-ID: <4011298D.6040401@pa.press.net>

I have written a script that makes a telnet connection, runs various 
commands, and returns the output.  That was the easy bit :)  However, to 
close the session, I need to send ^] followed by quit.  I've tried 
sending chr(29), which is the ascii equivalent, but that doesn't seem to 
work.  Is there something I'm missing?

Any pointers would be much appreciated.

Thanks

J



From kdahlhaus at yahoo.com  Wed Jan 28 09:33:58 2004
From: kdahlhaus at yahoo.com (Kevin Dahlhausen)
Date: 28 Jan 2004 06:33:58 -0800
Subject: raw audio input on Windows
References: <c9d82136.0401271050.2c483c2a@posting.google.com>
Message-ID: <283adf56.0401280633.765771aa@posting.google.com>

> Any hints are appreciated.


I've not messed with this myself yet, but I know of an app that does
serious audio processing that had to go through some part of the
direct-X library.  That app is sampling at a lot higher rate -
probably closer to the limits of pc sound cards.

If there's not a direct python api for directx, no pun intended,
there's a library that wraps any dll that should do the trick.


From sidharthk at hotmail.com  Wed Jan 28 12:51:21 2004
From: sidharthk at hotmail.com (Sidharth Kuruvila)
Date: Wed, 28 Jan 2004 23:21:21 +0530
Subject: isinstance() bug
References: <mailman.907.1075296157.12720.python-list@python.org><bv8lha$pbi5a$1@ID-223265.news.uni-berlin.de>
	<mailman.929.1075306173.12720.python-list@python.org>
	<bv8qhc$ph1mk$1@ID-223265.news.uni-berlin.de>
Message-ID: <bv8t3f$p2616$1@ID-223265.news.uni-berlin.de>

Stupid post must be ignored at all costs

"Sidharth Kuruvila" <sidharthk at hotmail.com> wrote in message
news:bv8qhc$ph1mk$1 at ID-223265.news.uni-berlin.de...
> i dont know unix.
> how does abs path work with sym-links.
>
>
>




From mesteve_b at hotmail.com  Wed Jan 14 22:03:53 2004
From: mesteve_b at hotmail.com (python newbie)
Date: Thu, 15 Jan 2004 03:03:53 GMT
Subject: I come not to bury C++, but to praise it...
References: <mailman.337.1074032524.12720.python-list@python.org>
Message-ID: <tqnNb.10910$ry6.2729@newssvr25.news.prodigy.com>

Are you against using C++ wrapped in a library such as wxWindows?  This
library makes it pretty easy painless to write cross-platform stuff, but
even on Windows alone, it beats MFC or the going price of Delphi.

"John Benson" <jsbenson at bensonsystems.com> wrote in message
news:mailman.337.1074032524.12720.python-list at python.org...
> I got into Python because I took one look at C++ and saw all the
handwaving
> in the introductory O'Reilly book to the effect that "everything looks
sweet
> now, but wait until these snazzy little features interact..." and then
> started casting around for another road to OOP. I happened upon Python,
and
> continue to use Python.
>
> I think that the already-posted comments seeking to appreciate the
> historical origin and motivations of C++ are essential to understanding
it's
> applicability in the present.
>
> C++ started as a quintessentially Unix-like exercise in software
> engineering: add functionality by leveraging existing software components
to
> the max. Another level of preprocessor (Cfront) was added to the compiler
> tool chain and Bingo! you had a new language. The advantage was quick
> time-to-implement. A big disadvantage was that you had to grok C to debug
> C++. Later compilers took C++ direct to object, but the C, non-OOP
heritage
> persisted in the new language: you had to master pointers and references
to
> really do C++. Later languages simplified the situation by dumping
pointers.
>
> I think that C++ was a great exercise, but software engineering has
> advanced. Why not take advantage of the latest packaging of OOP and enjoy
> the smoother ride? Pick Java, or Python or whatever pleases you. I'm happy
> using C for projects that fit it, and Python for more ambitions OOP stuff.
> C++ was a great way to move OOP forward, but now it looks more like a
> transitional form than a best-of-breed. Sic transit gloria mundi, which is
> Latin for "when you're hot, your hot; when you're not, you're not" or
> something like that.
>
> If you have a big investment in C++ and can crank out beautiful code in
your
> sleep, that's fine too. I just don't expect it to be as easy to find
people
> to maintain it as if it were written in C, or Python, or Java, or
whatever.
>
>
>




From elainejackson7355 at home.com  Thu Jan 29 13:03:36 2004
From: elainejackson7355 at home.com (Elaine Jackson)
Date: Thu, 29 Jan 2004 18:03:36 GMT
Subject: number of arguments a function takes
References: <CSaSb.329909$ts4.189798@pd7tw3no>
	<Xns947FAE6461014duncanrcpcouk@127.0.0.1>
Message-ID: <YVbSb.319671$JQ1.192347@pd7tw1no>

Exactly what I was looking for. Thank you very much.

"Duncan Booth" <me at privacy.net> wrote in message
news:Xns947FAE6461014duncanrcpcouk at 127.0.0.1...
| "Elaine Jackson" <elainejackson7355 at home.com> wrote in
| news:CSaSb.329909$ts4.189798 at pd7tw3no:
|
| > Suppose one of the arguments of a function f_1 is another function
| > f_2. Can f_1 access the number of arguments taken by f_2?  (I'm
| > writing a little script to automate the construction of logical
| > truth-tables.)  Thanks.
|
| Look at the inspect module, in particular you probably want
| inspect.getargspec:
|
| >>> import inspect
| >>> def f(a,b): pass
|
| >>> inspect.getargspec(f)
| (['a', 'b'], None, None, None)
| >>> help(inspect.getargspec)
| Help on function getargspec in module inspect:
|
| getargspec(func)
|     Get the names and default values of a function's arguments.
|
|     A tuple of four things is returned: (args, varargs, varkw, defaults).
|     'args' is a list of the argument names (it may contain nested lists).
|     'varargs' and 'varkw' are the names of the * and ** arguments or None.
|     'defaults' is an n-tuple of the default values of the last n arguments.
|
| >>>




From antivirus at lg.ehu.es  Tue Jan 27 08:31:32 2004
From: antivirus at lg.ehu.es (antivirus at lg.ehu.es)
Date: Tue, 27 Jan 2004 14:31:32 +0100
Subject: Virus Alert
Message-ID: <200401271331.i0RDVW4l022013@lgsx13.lg.ehu.es>

The mail message (file: doc.scr) you sent to jose at we.lc.ehu.es contains a virus (WORM_MIMAIL.R).



From tzot at sil-tec.gr  Thu Jan  8 12:08:55 2004
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Thu, 08 Jan 2004 19:08:55 +0200
Subject: Why " ".some_string is often used ?
References: <Xns94698A5566736stefninnospamyahoofr@213.228.0.4>
	<vvqghojub1dl07@news.supernews.com> <3FFD43EC.BC8240F9@alcyone.com>
Message-ID: <5f3rvvgohelv3ab6hk3fc4hbb41ii9mbio@4ax.com>

On Thu, 08 Jan 2004 03:50:04 -0800, rumours say that Erik Max Francis
<max at alcyone.com> might have written:

[' '.join discussion]

>And above all, of course, if you think it personally looks ugly, you can 
>
>	from string import join
>
>or write your own join function that operates over sequences and does
>whatever else you might wish.  That's what the flexibility is there for.

I believe str.join(string, sequence) works best for the functional types
(no need to rely on the string module).
-- 
TZOTZIOY, I speak England very best,
Ils sont fous ces Redmontains! --Harddix


From ykingma at accessforall.nl  Sun Jan  4 18:33:20 2004
From: ykingma at accessforall.nl (Ype Kingma)
Date: Mon, 05 Jan 2004 00:33:20 +0100
Subject: Scoped Lock
References: <bt9ovs$p92$1@graf.cs.uni-magdeburg.de>
Message-ID: <3ff8a259$0$121$e4fe514c@dreader10.news.xs4all.nl>

Marco Bubke wrote:

> Hi
> 
> There is the Lock object in the threading module.
> But there is no medode there I could aquire a scoped
> lock like:
> 
> mutex = threading.Lock()
> my_lock = mutex.scoped_acquire() # maybe scoped_lock()
> #now this stuff is locked
> 
> del mylock
> 
> #the lock is released.
> 
> def do_domething:
>   my_lock = mutex.scoped_acquire()
>   #now this stuff is locked
>   #the lock is released after its out of scope
> 
> 
> I have written this my own but I'm not sure there is a drawback
> because its looks so convinent. So I wonder why its not in
> the module?

Some reasons:
- What should happen when an exception happens during the locked stuff?
- It is possible pass a reference to the lock during the locked stuff,
  so although the lock goes out of local scope, there still might be
  a reference to it.
- The moment that __del__() is called is not guaranteed.

You can also do it like this:

mutex = threading.Lock()
mutex.acquire()
try:
    # now this stuff is locked
finally:
    mutex.release() # explicit is better than implicit

Regards,
Ype

email at xs4all.nl


From prtk3 at yahoo.com  Wed Jan 14 15:21:59 2004
From: prtk3 at yahoo.com (PT)
Date: 14 Jan 2004 12:21:59 -0800
Subject: wxPython worries
References: <mailman.352.1074092092.12720.python-list@python.org>
Message-ID: <9d1c4d6d.0401141221.22c587f5@posting.google.com>

> What worries me is wxPython: 
> I'm also 
> unclear as to how easy custom controls are to build.

None of the Python GUI toolkits support making good custom controls as
well as Java and .NET do.  TKinter is probably the best Python option
for that.  If you are comfortable with Windows programming though,
wxPython will not be too difficult.

> Am I just being confused by my newbie-ness, or are my initial concerns 
> justified?  What's anybody else's experiences with gui programming in 
> wxPython like vs a RAD like Delphi or .NET?

If you want something similar to Delphi or .NET, then you would
probably like QT Designer much better than the wx options.  See
BlackAdder (Win, $$) or eric3 (Linux, free):
http://www.thekompany.com/products/blackadder/
http://www.die-offenbachs.de/detlev/eric3.html

If money isn't an issue though, just stick with Visual Studio and C#
and let the other guy do most of the work.


From peter at engcorp.com  Wed Jan 28 09:17:03 2004
From: peter at engcorp.com (Peter Hansen)
Date: Wed, 28 Jan 2004 09:17:03 -0500
Subject: Easy way to make EXEs...
References: <NMDRb.28013$i4.26542@newsread1.news.atl.earthlink.net>
Message-ID: <4017C45F.D7501215@engcorp.com>

Xero Limit 126 wrote:
> 
> Okay, I am completely new to Python, and I really dont understand much, but
> I was wondering how to make a python script/program into a standalone .EXE?
> I dont understand py2exe at all, so if someone could tell me or find me an
> easy (For a newbie) to convert Python scripts to EXEs, please let me know!

What don't you understand about py2exe?  How it works, or how to actually
execute it?  Or something else?  If you have trouble with it, perhaps there
could be some improvements in the documentation...  but nobody will know 
unless you help us figure out what the problem is.

-Peter


From pythonhda at yahoo.com.replacepythonwithlinux  Fri Jan 30 10:10:27 2004
From: pythonhda at yahoo.com.replacepythonwithlinux (pythonhda at yahoo.com.replacepythonwithlinux)
Date: Fri, 30 Jan 2004 10:10:27 -0500
Subject: pyc file problem
References: <mailman.1033.1075459544.12720.python-list@python.org>
Message-ID: <20040130101027.0f484734.pythonhda@yahoo.com.replacepythonwithlinux>

You can also compile the .py to a python optimized file .pyo. That'll get rid of the comments.

Check out the "py_compile" module in the documentation.

The easiest way to do it would be to invoke python with the -O flag and import your module to generate the .pyo file.

On Fri, 30 Jan 2004 18:45:22 +0800
"Leo Yee" <surffirst at yahoo.com> wrote:

> Hi,
> 
> I am programming a online game program. I use python as my game's script
> language. To avoid hacking and cheating I don't want anyone to read the
> python script file and find useful information for hacking the game.
> 
> I know I can compile the '.py' file to '.pyc' file but I found that a normal
> text editor can read a lot of information from the '.pyc' file even those
> comments I wrote.
> 
> My question is if there is a methond to compile the '.py' file into a state
> that there are no human readable strings.
> 
> Thanks in advance.
> 
> Leo Yee
> 
> 
> 
> 


From tim.golden at viacom-outdoor.co.uk  Tue Jan 27 05:13:28 2004
From: tim.golden at viacom-outdoor.co.uk (Tim Golden)
Date: Tue, 27 Jan 2004 10:13:28 -0000
Subject: NetGetAnyDCName() - get PDC of a foreign WinNT-domain
Message-ID: <F1921F85572CB04D9F55B14BDC76B3E4434676@tdi_nt9.internal.viacom-outdoor.co.uk>

[... snip my suggestion of pdc = win32net.NetGetAnyDCName (None,
"name_of_other_domain") ...]

>From: usenet at mail-2-me.com [mailto:usenet at mail-2-me.com]
>
>Thanks for your help, but that does not work. I get an error message
>which sais it can't reach the domain.
>But I'm sure did not make an syntax-error, because if I enter my own
>domain it works.
>
>Any other idea?
>
>Dirk
>
>

To ask the obvious question: do you definitely have all
the necessary security / connectivity in place to reach
the domain controller on that domain?

Can you log onto it normally with whatever name you're
running under now?

(I don't have more than one domain here, so it's difficult
for me to test)
TJG


________________________________________________________________________
This e-mail has been scanned for all viruses by Star Internet. The
service is powered by MessageLabs. For more information on a proactive
anti-virus service working around the clock, around the globe, visit:
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From fred.duwez at freesurf.fr  Tue Jan 13 08:23:36 2004
From: fred.duwez at freesurf.fr (Sinclair)
Date: Tue, 13 Jan 2004 14:23:36 +0100
Subject: Generate PDF or LaTeX ?
Message-ID: <bu0r5k$q7f$1@news-reader4.wanadoo.fr>

Hi all,

I am looking for a way to generateLaTeX or PDF code from python/zope
objects. The goal is to produce print documents.
Does any python module exist to do that ?

Thanks for your help.




From virus at sbs.at  Mon Jan 26 20:43:12 2004
From: virus at sbs.at (virus at sbs.at)
Date: Tue, 27 Jan 2004 02:43:12 +0100
Subject: Virus Alert
Message-ID: <200401270143.i0R1hCgL002351@nets109x.sie.siemens.at>

The mail attachment file data.cmd was blocked, according to Siemens Austria InterScan VirusWall's configuration. The action rejected was taken. Please send your attachment in a zip-file protected with a password.



From bkelley at wi.mit.edu  Thu Jan  8 10:58:32 2004
From: bkelley at wi.mit.edu (Brian Kelley)
Date: Thu, 08 Jan 2004 10:58:32 -0500
Subject: MySQLDB multiple cursor question
In-Reply-To: <3ffc6160$0$572$b45e6eb0@senator-bedfellow.mit.edu>
References: <3ffc6160$0$572$b45e6eb0@senator-bedfellow.mit.edu>
Message-ID: <3ffd7dbe$0$560$b45e6eb0@senator-bedfellow.mit.edu>

Brian Kelley wrote:
> I am trying to use threads and mysqldb to retrieve data from multiple 
> asynchronous queries.
> 
> My basic strategy is as follows, create two cursors, attach them to the 
> appropriate databases and then spawn worker functions to execute sql 
> queries and process the results.

The problem goes away if I have only one cursor per connection and just 
use multiple connections.  This seems like a bug but I don't know for sure.

Brian



From tchur at optushome.com.au  Wed Jan 14 16:53:13 2004
From: tchur at optushome.com.au (Tim Churches)
Date: 15 Jan 2004 08:53:13 +1100
Subject: Safe prime numbers in Python
In-Reply-To: <16389.28642.425686.771599@montanaro.dyndns.org>
References: <200401140639.i0E6dxt09128@mail001.syd.optusnet.com.au>
	<mailman.349.1074082578.12720.python-list@python.org>
	<4005725d$1@nntp0.pdx.net>
	<16389.28642.425686.771599@montanaro.dyndns.org>
Message-ID: <1074117193.1189.69.camel@emilio>

On Thu, 2004-01-15 at 03:35, Skip Montanaro wrote:
>     >> Here's what I came up with using gmpy:
>     ...
> 
>     Scott> I suspect it might be faster if you looked for the lower prime:

Many thanks to Skip Montanaro and Scott Daniels for these suggestions. I
did not suspect that the gmpy library would have functions for prime
finding or testing. With a few days of processing I'll have more safe
primes than I'll ever need. Next step is to find all quadratic residuals
modulo p (where p is a safe prime). It notice that GMP has a function to
calculate the Legendre symbol (which hopefully gmpy wraps), so it should
be simple. Fab!

-- 

Tim C

PGP/GnuPG Key 1024D/EAF993D0 available from keyservers everywhere
or at http://members.optushome.com.au/tchur/pubkey.asc
Key fingerprint = 8C22 BF76 33BA B3B5 1D5B  EB37 7891 46A9 EAF9 93D0


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From sdfATexpertuneDOTcom  Fri Jan 23 13:20:41 2004
From: sdfATexpertuneDOTcom (Scott F)
Date: Fri, 23 Jan 2004 18:20:41 -0000
Subject: Program Python in VIM
References: <871xpsc5zf.fsf@tulip.whu.ca> <r7xrvm1a.fsf@yahoo.co.uk>
	<40103ee7.108130723@news.blueyonder.co.uk>
	<3ae9c53d.0401230913.64c7150d@posting.google.com>
Message-ID: <Xns94797D940180Asdfexpertunecom@216.168.3.44>

mike at mhuffman.com (Mike Huffman) wrote in
news:3ae9c53d.0401230913.64c7150d at posting.google.com: 

> 
>:w
>:!python %
> 
> then thereafter in the current vi session:
>:!!
> 
> It would be nice to be able to combine the write and shell command
> in one single command...
> 

This should do it.

    map <somekey> :w<CR>:!python %<CR>

Scott


From markus_wankus at hotmail.com  Wed Jan 21 11:42:56 2004
From: markus_wankus at hotmail.com (Markus Wankus)
Date: Wed, 21 Jan 2004 11:42:56 -0500
Subject: Help, *.CHM, etc
References: <90f2d9db.0401201803.6f2adbf8@posting.google.com>
Message-ID: <opr14wpuwp8cxiwf@news.packetworks.net>

If you are interested, here is a snippet of how I did it a long time ago 
in a galaxy far, far away.  It avoids spawning multiple instances of the 
same .chm.

# 
----------------------------------------------------------------------------
# The Help..Contents menu command
     def OnMnuHelpContents(self, event):
         """This method opens the Help file (if it isn't open already)."""
         # Display the help file - nothing fancy - just run it
         # ToDo - if already running bring to top (I can't see a way to do
         # this, currently)
         global helpfile_active

         helpfilename = os.path.join(r'path_to_your_helpfile', 
r'yourhelpfile.chm')
         if not helpfile_active:
             helpprocid = wxNewId()
             self.helpfile_process = wxProcess(self, helpprocid)
             EVT_END_PROCESS(self, helpprocid, self.OnHelpWindowTerminate)
             helpfile_active = wxExecute('hh.exe %s' % helpfilename, False,
                                     self.helpfile_process)
# 
----------------------------------------------------------------------------
     def OnHelpWindowTerminate(self, event):
         """This event function is fired when the help window is closed."""
         global helpfile_active

         if helpfile_active:
             self.helpfile_process.Detach()
             self.helpfile_process.Destroy()
         helpfile_active = 0
# 
----------------------------------------------------------------------------

Couldn't tell you if os.startfile is better or not...but I imagine 
wxExecute is calling the Windows ShellExecute under the covers anyway.  Of 
course, this also fails if they do not have hh.exe installed but this is 
only on stock Win95 or older NT machines with IE < 5.0.  I imagine you 
could spruce it up with more error checking.

You may also want to get rid of the global and use a real attribute...this 
is from my beginner days. ;o)

Markus.

On 20 Jan 2004 18:03:36 -0800, Tom <its1louder at yahoo.com> wrote:

> A question for gui application programmers. . .
> I 've got some GUI programs, written in Python/wxPython, and I've got
> a help button and a help menu item.  Also, I've got a compiled file
> made with the microsoft HTML workshop utility, lets call it
> c:\path\help.chm.  My question is how do you launch it from the GUI?
> What logic do I put behind the "help" button, in other words.
>
> I thought it would be
>
> os.spawnv(os.P_DETACH, "c:\\path\\help.chm", [])
>
> but I get an error:
>
> OSError: [Errno 8]  Exec format error
>
> so I guess help.chm isn't executable itself, but is associated with
> some unknown executable.  I tried explorer.exe- at the dos cmd line it
> basically works to type
>
> explorer.exe c:\path\help.chm
>
> although there is a nag screen that would be nice to do without.
>
> so you'd think
>
> os.spawnv(os.P_DETACH, 'explorer.exe', ["c:\\path\\help.chm"])
>
> would be equivalent but it fails.  I have to believe someone out there
> in python community likes to include help.chm with their applications,
> nad there is a right way to do this.
>
> On another note, are there pure python based help viewers that people
> use instead?  The reason I ask is that would be more portable then the
> *.chm files are.  If there is such a beast I can't find it.


From bignose-hates-spam at and-benfinney-does-too.id.au  Thu Jan 22 23:19:22 2004
From: bignose-hates-spam at and-benfinney-does-too.id.au (Ben Finney)
Date: 23 Jan 2004 15:09:22 +1050
Subject: get "yesterday's" date in iso format
References: <pan.2004.01.23.04.13.55.406832@quanta1.world-vr_stupidspambot.com>
Message-ID: <slrnc119bq.haf.bignose-hates-spam@iris.polar.local>

On Thu, 22 Jan 2004, necromancer_stupidspambot at quanta1.world-vr_stupidspambot.com wrote:
> I am trying to find a simple way to get "yesterday's" date.

    >>> import datetime
    >>> today = datetime.date.today()
    >>> today
    datetime.date(2004, 1, 23)
    >>> yesterday = today - datetime.timedelta( 1 )
    >>> yesterday
    datetime.date(2004, 1, 22)

-- 
 \      "We must become the change we want to see."  -- Mahatma Gandhi |
  `\                                                                   |
_o__)                                                                  |
Ben Finney <http://bignose.squidly.org/>


From miki.tebeka at zoran.com  Mon Jan 19 17:35:16 2004
From: miki.tebeka at zoran.com (Miki Tebeka)
Date: 19 Jan 2004 14:35:16 -0800
Subject: What's the best Python freeze tool?
References: <bu969m$jqu$1@news3.bu.edu> <bug6e9$q9c$1@news-reader5.wanadoo.fr>
Message-ID: <4f0a9fdb.0401191435.5b134ad@posting.google.com>

Hello Eric,

> I'm working with McMillan Installer and didn't see any major bug. Note however 
> I'm still using Python 2.1 and Installer 5b5_5. There is apparently a new 
> Installer version (6 something - not yet "official"), but I don't know if it 
> correctly supports Python 2.3 now; I'm quite interested in hearing other users' 
> experiences, BTW...

I've used py2exe a lot and it's OK. The latest version (0.5) made me
switch to cx_freeze (new syntax for setup.py, less comptability with
scripts running from the interpreter ...). I'm pretty happy with it.

Miki


From deets_noospaam at web.de  Sun Jan  4 10:44:17 2004
From: deets_noospaam at web.de (Diez B. Roggisch)
Date: Sun, 04 Jan 2004 16:44:17 +0100
Subject: how to make a code object a function
References: <bt93ds$tuv$00$1@news.t-online.com>
	<bt96ll$75c$02$1@news.t-online.com>
Message-ID: <bt9cd0$t3q$01$1@news.t-online.com>

Hi,

> Too lazy to type self?

yes. I used an underscore in java as indication for member-variables, so
typing _. appeared natural to me. 
 
>>>> import types
>>>> class T(object):
> ...     def add_dependency(self, name):
> ...             print "adding dependency", name
> ...
>>>> t = T()
>>>> def p_op1(_, args):
> ...     _.add_dependency("p_op1")
> ...
>>>> t.p_op1 = types.MethodType(p_op1, t)
>>>> t.p_op1(1)
> adding dependency p_op1
>>>>
> 
> By the way, types.MethodType and new.instancemethod seem to be equivalent.

Interesting - from the docs, I can't see that types.MethodType has a
constructor like this. 

Your example above gave me the idea to simply exec() my code-object, so in
the end I have a new function called p_op1 in my scope - that function I
can get using locals()['p_op1']. I know the name, so that works. 

Just out of curiosity - is there a way to know the name of a code object you
know nothing about except that it will become a function definition? I
guess I could go for some AST-stuff looking for a "def foo" statement, so I
know I will end up having defined foo when exec'ing the code object.

Regards,

Diez B. Roggisch


From bsneddonNOspam at yahoo.com  Wed Jan 28 10:24:51 2004
From: bsneddonNOspam at yahoo.com (Bill Sneddon)
Date: Wed, 28 Jan 2004 10:24:51 -0500
Subject: r prefix bug ... or my lack of understanding?
In-Reply-To: <mailman.913.1075301132.12720.python-list@python.org>
References: <bv8gtj$5ob$1@ngspool-d02.news.aol.com>
	<mailman.913.1075301132.12720.python-list@python.org>
Message-ID: <bv8k84$8n2$1@ngspool-d02.news.aol.com>

David Goodger wrote:

> It's a FAQ:
> http://www.python.org/doc/faq/general.html#why-can-t-raw-strings-r-strings-end-with-a-backslash 
> 
> (or question 4.24 of http://www.python.org/doc/faq/general.html).
> 
> -- David Goodger
> 
> 
Thanks I looked at faqs.org did not see it.
It does not seem to be kept up to date.  I will check python.org in
the future.

Bill



From gongli at cutey.com  Sat Jan  3 17:46:26 2004
From: gongli at cutey.com (gong)
Date: 3 Jan 2004 14:46:26 -0800
Subject: pickling lambdas?
Message-ID: <9abf3a27.0401031446.4d73cfb2@posting.google.com>

hi

i would like to pickle a lambda; according to the library docs in 2.3,
i believe this shouldnt be possible, since a lambda is not a function
defined at the top level of  a module (?)

however, upon google searching for "python lambda pickle" i find 2
posts, one including gvr, which apparently demonstrate that this was
being attempted and even suggest that it is feasible.  has this become
available yet, or will it be soon?

thanks
gong


From rmkrauter at yahoo.com  Sun Jan 25 00:58:30 2004
From: rmkrauter at yahoo.com (Rich Krauter)
Date: Sun, 25 Jan 2004 00:58:30 -0500
Subject: perl bug File::Basename and Perl's nature
In-Reply-To: <7fe97cc4.0401242131.22acf485@posting.google.com>
References: <7fe97cc4.0401242131.22acf485@posting.google.com>
Message-ID: <1075010310.4567.72.camel@vaio>

You're supposed to pass in regexes, perhaps? So your '.m'  argument
actually means "anything followed by an m" and not literally "a dot
followed by an m". Just a guess, but that would explain your problem.  
Rich

On Sun, 2004-01-25 at 00:31, Xah Lee wrote:

> Just bumped into another irresponsibility in perl.
> 
> the crime in question this time is the module File::Basename.
> 
> Reproduction:
> 
> 1. create a directory containing a file of this name: "cdrom.html".
> 2. "use File::Basename;", with the line:
>    ($name,$path,$suffix) = fileparse($File::Find::name, ('.html',
> '.m'));
> 3. Notice that your cdrom.html will be parsed into "cdr" with suffix
> "om.html".
> 
> expletive Perl and Perl slinging morons.
> 
> Now, if you peruse the "documentation" of "perldoc File::Basename",
> you'll see that it shouldn't be so. AND, the writting as usuall is
> fantastic incompetent. To illustrate, i quote:
> 
> --begin quote
> 
>  fileparse
> 
>  The fileparse() routine divides a file
>  specification into three parts: a leading path, a
>  file name, and a suffix. The path contains
>  everything up to and including the last directory
>  separator in the input file specification. The
>  remainder of the input file specification is then
>  divided into name and suffix based on the
>  optional patterns you specify in
>  @suffixlist. Each element of this list can be a
>  qr-quoted pattern (or a string which is
>  interpreted as a regular expression), and is
>  matched against the end of name. If this
>  succeeds, the matching portion of name is removed
>  and prepended to suffix. By proper use of
>  @suffixlist, you can remove file types or
>  versions for examination.
> 
> --end quote
> 
> Note the last sentence: "By proper use of @suffixlist, you can remove
> file types or versions for examination." Now, this is in sync with the
> usual verbiages of unix man pages, of mentioning irrevalent things.
> Why the fuck do i need to know what is version, or examination what??
> Not every morons in this world is using unix with its morinic
> convention of appending things to file names as a versioning system,
> and not every moron in this world need to "exam" things. The unix
> irrevalency, inprecision, driveling are paragoned above.
> 
> Here is a better documentation for the fileparse subroutine.
> 
>  fileparse
> 
>  fileparse divides a file name into 3 parts:
>  directory string, file name, file name
>  suffix. fileparse($filename, @suffixes) returns a
>  array of 3 elements ($name, $dir_path,
>  $suffix). The concocted result of
>  "dir_path$name$suffix" is guaranteed to equal to
>  $filename. The @suffixes is a array of strings,
>  for example ('\.html', '\.txt', '\.png'). These
>  strings are interpreted to be regular
>  expressions, and is matched against the end of
>  $filename.
> 
> 
> But NOOO, perl morons are too enamored with driveling to write such
> functional spec, after all, the code is sloppy and they don't REALLY
> know what the code really does. This is not just one incompetence.
> Perl is filled with them.
> 
> This report is on Perl version:
>   This is perl, v5.8.1-RC3 built for darwin-thread-multi-2level
>   (with 1 registered patch, see perl -V for more detail)
> 
> --
> 
> To the rookie programers out there, i advice against learning Perl.
> (i suggest Python instead) Please see
>  http://xahlee.org/UnixResource_dir/perlr.html
> 
>  Xah
>  xah at xahlee.org
>  http://xahlee.org/PageTwo_dir/more.html
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From webmaster at beyond-thoughts.com  Thu Jan  8 17:44:56 2004
From: webmaster at beyond-thoughts.com (Christoph Becker-Freyseng)
Date: Thu, 08 Jan 2004 23:44:56 +0100
Subject: PRE-PEP: new Path class; isValid, exists
In-Reply-To: <mailman.185.1073563995.12720.python-list@python.org>
References: <vvivefh35qjv9a@news.supernews.com>	<3FFA7E82.4020609@beyond-thoughts.com>	<mailman.159.1073418070.12720.python-list@python.org>	<3FFC9209.7060703@beyond-thoughts.com>
	<mailman.185.1073563995.12720.python-list@python.org>
Message-ID: <3FFDDD68.9070202@beyond-thoughts.com>

Gerrit Holl wrote:

> Christoph Becker-Freyseng wrote:
> 
>>Additionaly path-validity is filesystem-dependend. And worse on system 
>>like Linux there can be more than one file system within the same root / 
>>and they all could have different restrictions!
>>(if I were a viscious guy I could even umount and mount a different fs 
>>making a valid path possibly invalid)
> 
> 
> I think this makes validating a path essentially impossible to get
> right. Let's say we can declare path to be invalid, but we can't declare
> a path to be valid. Is it a good thing to add a method for it then? (I
> think yes)
> 
> 
>>So I think the better solution would be to define a
>>path.isValid()
> 
> 
> I agree that it's better. We should allow invalid paths after all.
Yes. path.isValid would it make possible to check better for situations 
were calling things like mkdir and mkdirs (they directly depend on the 
path being valid) makes trouble.
We could also add an InvalidPathException. Which will at least help 
debugging. isValid could have a default argument "raiseExc=False" to 
make checking in these functions convienent e.g.
def mkdir(self):
	self.isValid(raiseExc=True)
	moreStuff ...
If the path is invalid it will stop with an InvalidPathException.

Also path.exists should depend on path.isValid (not the other way).
If the full-path doesn't exist one can go up all the parent-dirs until 
one exist. Here we can check if the specified sub-path is valid by 
getting some information about the filesystem where the parent-dir is 
stored. *this implicit makes isValid a reading method* --- however AFAIK 
isValid is only needed for reading and writing methods.
> 
> 
>>We also need a
>>path.exists()
>>method.
> 
> 
> Sure.
> 
> 
>>I'm not sure how both should interact ??
> 
> 
> Well, if path.exists(), path.isValid(). The question is - should
> path.isValid() read the filesystem?
Yes as stated above.

path.exists should at first check if the path isValid at all. If it 
isn't a statement about it's existance is senseless. In this case it 
should return None, which evaluates also False but is different  (it's a 
"dreiwertige Logik" --- when you have 3 states (true, false, unknown) 
how is this called in English)

FIXME: We have to finetune the "recursive" behavior of isValid and 
exists otherwise we have a lot of unnecessary calls as exists and 
isValid call each other going one dir up ...


Christoph Becker-Freyseng






From Florian.Lindner at xgm.de  Thu Jan 29 11:12:21 2004
From: Florian.Lindner at xgm.de (Florian Lindner)
Date: Thu, 29 Jan 2004 17:12:21 +0100
Subject: Get number of iteration
Message-ID: <bvbbd7$9rv$01$1@news.t-online.com>

Hi!
If I iterate through a list, is there a way I can get the number of the
iteration: first, second, third, ...

l = ["three", "four", "five", "six"]
for x in l
  print x
  print x.iteration()  # <- That's what I'm looking for!
  print "next"

prints that:

three
1
next
four
2
next
fixe
3
next
six
4
next

Thx,
Florian


From bart_nessux at hotmail.com  Thu Jan 15 15:08:23 2004
From: bart_nessux at hotmail.com (Bart Nessux)
Date: Thu, 15 Jan 2004 15:08:23 -0500
Subject: python & mathematical methods of picking numbers at random
In-Reply-To: <mailman.414.1074195832.12720.python-list@python.org>
References: <bu6ptu$kjm$1@solaris.cc.vt.edu>
	<mailman.414.1074195832.12720.python-list@python.org>
Message-ID: <bu6rvn$njg$1@solaris.cc.vt.edu>

Jeff Epler wrote:
> It sounds like your co-worker has re-written sample.  random.sample(l, 1)
> is the same as random.choice(l), so that's another source of inefficiency.
> 
> But why are *you* using 
>     random.sample(range(len(x)), 25)
> instead of
>     random.sample(x, 25)
> ?
> 
> Jeff
> 

Because it works and it's fast and len(count) changes every drawing.



From gsmith at oxfam.org.uk  Wed Jan 28 09:53:33 2004
From: gsmith at oxfam.org.uk (Graham)
Date: Wed, 28 Jan 2004 14:53:33 -0000
Subject: Distributing Python programs
References: <4017abb7$0$9394$ed9e5944@reading.news.pipex.net>
	<4017C6EE.E7F1B27@engcorp.com>
Message-ID: <4017cd62$0$9388$ed9e5944@reading.news.pipex.net>

"Peter Hansen" <peter at engcorp.com> wrote in message

> Yes, we run dozens of machines from a single network installation.
> Depending on what extensions you need to install (e.g. win32all) you may
> need to make some small manual adjustments to get it to work, but
> in essence you can just do a "non-admin" local install, then copy the
> entire directory tree to the network.
>
Peter
Thanks for this info.  Will this work with Python for Windows?  I tried what
you suggested a few days ago but found when I ran a python script it asked
me for a python.dll which I have found not in the directory tree but in my
local system32 directory (I have a local Python installation).

What is significant about the "non-admin" install and how do you do this?

regards

Graham Smith

PeopleSoft Technical Team Leader
OXFAM GB
+44 (1865) 313255
gsmith at oxfam.org.uk




From steve at ninereeds.fsnet.co.uk  Sat Jan 31 14:33:40 2004
From: steve at ninereeds.fsnet.co.uk (Stephen Horne)
Date: Sat, 31 Jan 2004 19:33:40 +0000
Subject: PEP 327: Decimal Data Type
References: <mailman.1054.1075487007.12720.python-list@python.org>
	<bvef14$919$1@news.service.uci.edu>
	<ad052e5c.0401310101.1c5bd5aa@posting.google.com>
	<h6um10dknflfcgt3id6tril2fs3lbb3vsq@4ax.com>
	<bvgp4j$dp2$1@news.service.uci.edu>
Message-ID: <jvtn10177itao5m0lgt25bofut9h5qj4c6@4ax.com>

On Sat, 31 Jan 2004 09:35:09 -0800, Josiah Carlson
<jcarlson at nospam.uci.edu> wrote:

>> If I needed more than that, I'd use a rational type - I speak from
>> experience as I set out to write a base N float library for C++ once
>> upon a time and ended up writing a rational instead. A rational, BTW,
>> isn't too bad to get working but that's as far as I got - doing it
>> well would probably take a lot of work. And if getting Base N floats
>> working was harder than for rationals, getting them to work well would
>> probably be an order of magnitude harder - for no real benefit to 99%
>> or more of users.
>
>I also wrote a rational type (last summer).  It took around 45 minutes. 
>  Floating point takes a bit longer to get right.

Was your implementation the 'not too bad to get working' or the 'doing
it well'?

For instance, there is the greatest common divisor that you need for
normalising the rationals. 

I used the Euclidean algorithm for the GCD. Not too bad, certainly
better than using prime factorisation, but as I understand it doing
the job well means using a better algorithm for this - though I never
did bother looking up the details.

Actually, as far as I remember, just doing the arbitrary length
integer division functions took me more than your 45 minutes. The long
division algorithm is simple in principle, but I seem to remember
messing up the decision of how many bits to shift the divisor after a
subtraction. Of course in Python, that's already done.

Maybe I was just having a bad day. Maybe I remember it worse than it
really was. Still, 45 minutes doesn't seem too realistic in my memory,
even for the 'not too bad to get working' case.


-- 
Steve Horne

steve at ninereeds dot fsnet dot co dot uk


From ville.spamstermeister.vainio at thisisspamprotectiontut.finland  Tue Jan 20 16:26:06 2004
From: ville.spamstermeister.vainio at thisisspamprotectiontut.finland (Ville Vainio)
Date: 20 Jan 2004 23:26:06 +0200
Subject: an example of a singleton design pattern in python?
References: <hc63caapdui.fsf@praxis.lsil.com>
Message-ID: <du7smiacnwx.fsf@mozart.cc.tut.fi>

>>>>> "Daniel" == Daniel Ortmann <dortmann at lsil.com> writes:

    Daniel> Hello, Does anyone have an example of a singleton design
    Daniel> pattern in python?


This trivial snippet might be enough for your needs:

class Foo():
    pass

_inst = None

def fooinstance():
    if not _inst:
        _inst = Foo()
    return _inst

-- 
Ville Vainio   http://tinyurl.com/2prnb


From rganesan at myrealbox.com  Tue Jan 20 06:33:04 2004
From: rganesan at myrealbox.com (Ganesan R)
Date: Tue, 20 Jan 2004 17:03:04 +0530
Subject: ctypes 0.6.3 released
References: <r7xzadif.fsf@python.net>
Message-ID: <ou1xpuonwv.fsf@andlx-anamika.cisco.com>

>>>>> "Thomas" == Thomas Heller <theller at python.net> writes:

>     It works on Windows, Linux and MacOS X (the latter require that
>     your machine is supported by libffi).

Hi,

I maintain the ctypes Debian package. The following patch allows ctypes to
be built on 64-bit archs.

--- ctypes-0.6.3.orig/source/callproc.c
+++ ctypes-0.6.3/source/callproc.c
@@ -549,11 +549,11 @@
 #if (SIZEOF_LONG_LONG == 8 && SIZEOF_LONG == 4)
 #undef ffi_type_ulong
 #define ffi_type_ulong ffi_type_uint32
-#define ffi_type_ulonglong ffi_type_uint64
 #undef ffi_type_slong
 #define ffi_type_slong ffi_type_sint32
-#define ffi_type_slonglong ffi_type_sint64
 #endif
+#define ffi_type_ulonglong ffi_type_uint64
+#define ffi_type_slonglong ffi_type_sint64

Ganesan

--
Ganesan R (rganesan at debian dot org) | http://www.debian.org/~rganesan/
1024D/5D8C12EA, fingerprint F361 84F1 8D82 32E7 1832  6798 15E0 02BA 5D8C 12EA



From Antigen_EXCHANGE_MTL at smtp.cidc.net  Fri Jan 30 21:49:22 2004
From: Antigen_EXCHANGE_MTL at smtp.cidc.net (Antigen_EXCHANGE_MTL at smtp.cidc.net)
Date: 30 Jan 2004 21:49:22 -0500
Subject: Our Anti-Vrus system found VIRUS= MyDoom.A@m (Norman, CA(Vet),
	Kaspersky) worm
Message-ID: <EXCHANGE-MTLyl6ds7s00004667@exchange-mtl.pharmascience.com>

Our Anti-Vrus system found doc.zip->doc.exe infected with VIRUS= MyDoom.A at m (Norman,CA(Vet),Kaspersky) worm.
The message is currently Purged.  The message, "Test", was
sent from python-list at python.org 




From max at alcyone.com  Sat Jan  3 18:19:27 2004
From: max at alcyone.com (Erik Max Francis)
Date: Sat, 03 Jan 2004 15:19:27 -0800
Subject: Cheetah best for templating?
References: <CMudnfQnOeIn1GqiRVn-uQ@comcast.com>
Message-ID: <3FF74DFF.6BE7AC7D@alcyone.com>

Roger Jack wrote:

> I have just finished reading Code Generation In Action which uses Ruby
> for
> code generation. I would like to use Python instead. Is Cheetah the
> best
> tool to use for templating source code files and then generating code?
> Is
> there something more mature or better?

I tend to think highly of EmPy, but that's not exactly a surprise :-):

	http://www.alcyone.com/software/empy/

I do know that there are several people on the EmPy mailing list using
EmPy for exactly the purpose you're considering.

What's going to be best for you is really going to depend on your
aesthetic sensibilities; pretty much all of templating systems' base
features are universal, just expressed in different ways.  The only
thing that might objectively make one system better than another for you
would be ancillary features which are included on top.

-- 
 __ Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
/  \ San Jose, CA, USA && 37 20 N 121 53 W && &tSftDotIotE
\__/ Granted that I must die, how shall I live?
    -- Michael Novak


From jdhunter at ace.bsd.uchicago.edu  Thu Jan 22 07:39:19 2004
From: jdhunter at ace.bsd.uchicago.edu (John Hunter)
Date: Thu, 22 Jan 2004 06:39:19 -0600
Subject: prog/lib to draw graphs
In-Reply-To: <buofpq$1ra$06$1@news.t-online.com> (Florian Lindner's message
	of "Thu, 22 Jan 2004 13:34:56 +0100")
References: <buofpq$1ra$06$1@news.t-online.com>
Message-ID: <m2llo0i2dk.fsf@mother.paradise.lost>

>>>>> "Florian" == Florian Lindner <Florian.Lindner at xgm.de> writes:

    Florian> Hello, I'm looking for a program or python library to
    Florian> draw graphs.  They should look like the that:


    Florian> /--------\ /--------\ | Node A | ------ belongs to ---->
    Florian> | Node B | \--------/ \--------/

    Florian> Which is a result of the function call like that:

    Florian> connectNodes(firstNode, secondNode, description,
    Florian> lineStyle) connectNodes("Node A", "Node B", "belongs to",
    Florian> dashed)

    Florian> It should have a open scalable vector format as output
    Florian> (DVI, SVG, PDF, ...)  and should be able to make
    Florian> automatic optimal placement of the items.  Do you know
    Florian> something like that?  Thx, Florian --
    Florian> http://mail.python.org/mailman/listinfo/python-list

graphviz is a sophisticated graph drawing program

  http://www.research.att.com/sw/tools/graphviz/

There is a python interface

    http://www.cs.virginia.edu/~jg9h/graphiz/

JDH




From reply.in.the.newsgroup at my.address.is.invalid  Fri Jan 23 04:40:26 2004
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Fri, 23 Jan 2004 10:40:26 +0100
Subject: Accessing Microsoft Word from Python
References: <mailman.676.1074841832.12720.python-list@python.org>
Message-ID: <aqq110901q5i3bl1mcpua35o3271m6nq7l@4ax.com>

Mickel Gr?nroos:
>Does anybody have any good pointers on where I can find information 
>about accessing Word-documents (or other Microsoft Office applications) 
>from Python?

This book: http://safari.oreilly.com/1565926218 explains how to access
Excel from Python. It also explains COM-interfacing in general.

>To be more specific, I want to be able to:

I think you should look that up in the Word object model (probably on
http://msdn.microsoft.com), since it's not Python-specific.

-- 
Ren? Pijlman


From alanmk at hotmail.com  Fri Jan 16 17:57:50 2004
From: alanmk at hotmail.com (Alan Kennedy)
Date: Fri, 16 Jan 2004 22:57:50 +0000
Subject: Suggested generator to add to threading module.
References: <7934d084.0401152058.164a240c@posting.google.com>
	<40083eac$0$321$e4fe514c@news.xs4all.nl>
	<mailman.446.1074283391.12720.python-list@python.org>
Message-ID: <40086C6E.8536542C@hotmail.com>

[Andrae Muys]
>>> Found myself needing serialised access to a shared generator from
>>> multiple threads.  Came up with the following
>>>
>>> def serialise(gen):
>>>   lock = threading.Lock()
>>>   while 1:
>>>     lock.acquire()
>>>     try:
>>>       next = gen.next()
>>>     finally:
>>>       lock.release()
>>>     yield next

[Ype Kingma]
>> Is there any reason why the lock is not shared among threads?
>> From the looks of this, it doesn't synchronize anything
>> between different threads. Am I missing something?

[Jeff Epler]
> Yes, I think so.  You'd use the same "serialise" generator object in
> multiple threads, like this:
> 
> p = seralise(producer_generator())
> threads = [thread.start_new(worker_thread, (p,))
>                 for t in range(num_workers)]

Hmm. I think Ype is right: the above code does not correctly serialise
access to a generator.

The above serialise function is a generator which wraps a generator.
This presumably is in order to prevent the wrapped generators .next()
method being called simultaneously from multiple threads (which is
barred: PEP 255: "Restriction:  A generator cannot be resumed while it
is actively running")

http://www.python.org/peps/pep-0255.html

However, the above implementation re-creates the problem by using an
outer generator to wrap the inner one. The outer's .next() method will
then potentially be called simultaneously by multiple threads. The
following code illustrates the problem

#-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
import time
import thread
import threading

def serialise(gen):
  lock = threading.Lock()
  while 1:
    lock.acquire()
    try:
      next = gen.next()
    finally:
      lock.release()
    yield next

def squares(n):
  i = 1
  while i < n:
    yield i*i
    i = i+1

def worker_thread(iter, markers):
  markers[thread.get_ident()] = 1
  results = [] ; clashes = 0
  while 1:
    try:
      results.append(iter.next())
    except StopIteration:
      break
    except ValueError, ve:
      if str(ve) == "generator already executing":
        clashes = clashes + 1
  del markers[thread.get_ident()]
  print "Thread %5s: %d results: %d clashes." % (thread.get_ident(),\
   len(results), clashes)

numthreads = 10 ; threadmarkers = {}
serp = serialise(squares(100))
threads = [thread.start_new_thread(worker_thread,\
            (serp, threadmarkers)) for t in xrange(numthreads)]
while len(threadmarkers.keys()) > 0:
  time.sleep(0.1)
#-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

I believe that the following definition of serialise will correct the
problem (IFF I've understood the problem correctly :-)

#-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
import time
import thread
import threading

class serialise:
  "Wrap a generator in an iterator for thread-safe access"

  def __init__(self, gen):
    self.lock = threading.Lock()
    self.gen = gen

  def __iter__(self):
    return self

  def next(self):
    self.lock.acquire()
    try:
      return self.gen.next()
    finally:
      self.lock.release()

def squares(n):
  i = 1
  while i < n:
    yield i*i
    i = i+1

def worker_thread(iter, markers):
  markers[thread.get_ident()] = 1
  results = [] ; clashes = 0
  while 1:
    try:
      results.append(iter.next())
    except StopIteration:
      break
    except ValueError, ve:
      if str(ve) == "generator already executing":
        clashes = clashes + 1
  del markers[thread.get_ident()]
  print "Thread %5s: %d results: %d clashes." % (thread.get_ident(),\
   len(results), clashes)

numthreads = 10 ; threadmarkers = {}
serp = serialise(squares(100))
threads = [thread.start_new_thread(worker_thread,\
            (serp, threadmarkers)) for t in xrange(numthreads)]
while len(threadmarkers.keys()) > 0:
  time.sleep(0.1)
#-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

Also, I don't know if I'm happy with relying on the fact that the
generator raises StopIteration for *every* .next() call after the
actual generated sequence has ended. The above code depends on the
exhausted generator raising StopIteration in every thread. This seems
to me the kind of thing that might be python-implementation specific.
For example, the original "Simple Generators" specification, PEP 255,
makes no mention of expected behaviour of generators when multiple
calls are made to the its .next() method after the iteration is
exhausted. That I can see anyway? Am I wrong?

http://www.python.org/peps/pep-0255.html

regards,

-- 
alan kennedy
------------------------------------------------------
check http headers here: http://xhaus.com/headers
email alan:              http://xhaus.com/contact/alan


From poelzi at poelzi.org  Tue Jan  6 09:17:57 2004
From: poelzi at poelzi.org (daniel.poelzleithner)
Date: Tue, 06 Jan 2004 15:17:57 +0100
Subject: Problems with threads and embedding
Message-ID: <3FFAC395.9080900@poelzi.org>

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

Hi,

i wrote a module for ctrlproxy which embedds python and provides an api
that ctrlproxy is scriptable.

Every script is started in an own interpreter instance and registers
some callback functions for different events.
The module is threadsafe and everything works just fine, with one
exceptions, dead threads are not removed from the process list.



import time
import thread
import sys
import os

def runme():
	time.sleep(2)
	print "PID: %s" %(os.getpid())
	print "PID: %s" %(os.getppid())
	print " ------------ END -------------"

print thread.start_new(runme,())


Results in:


poelzi   20633  0.1  2.2 17296 11508 pts/17  S    02:24   0:12  |   \_
gdb ./ctrlproxy
poelzi   15187  0.7  1.0 13136 5464 pts/17   T    05:55   0:00  |
\_ /home/poelzi/Projects/ctrlproxy/ctrlproxy
poelzi   15189  0.0  1.0 13136 5464 pts/17   T    05:55   0:00  |
~    \_ /home/poelzi/Projects/ctrlproxy/ctrlproxy
poelzi   15190  0.0  0.0     0    0 pts/17   Z    05:55   0:00  |
~        \_ [ctrlproxy] <defunct>



I tried to spend time in every created thread through the advanced
debugging api, but this changed nothing. I experimented with the
sys.exitfunc without success.


I added some debugging function to see what happens.

[...]
** INFO: Loading Python scripts
CREATED THREAD 16384
[...]

16384 is the thread of the script

[...]
ID:0:/home/poelzi/Projects/ctrlproxy/example/test.py
Joining channel #test
IS: 0x80cba58 134560928
TS: 0x810e2d0 16386
TS: 0x80fe860 16384
TS: 0x80bb028 16384
IS: 0x8083638 16384
TS: 0x8083660 16384
IS: 0x80cba58 134560928
TS: 0x810e2d0 16386
TS: 0x80fe860 16384
TS: 0x80bb028 16384
IS: 0x8083638 16384
TS: 0x8083660 16384
** INFO:  ------------ END -------------
IS: 0x80cba58 134560928
TS: 0x80fe860 16384
TS: 0x80bb028 16384
IS: 0x8083638 16384
TS: 0x8083660 16384
IS: 0x80cba58 134560928
TS: 0x80fe860 16384
TS: 0x80bb028 16384
IS: 0x8083638 16384
TS: 0x8083660 16384

IS is a interpreter state and TS a thread state.
16386 seems to be the thread created by the script. After it exists,
Python knows nothing about the thread anymore, but the return code
didn't seems to be catched.


The sourcecode is to large and CVSweb currently broken...
I uploaded the code @
http://files.poelzi.org/tmp/ctrlproxy_python/

http://files.poelzi.org/tmp/ctrlproxy_python/python.c is the main file.


Any hints for me so solve this anoying problem ? :(


regards
~ Daniel

- --
nihil me cirumdat

.. . .. ... . . .. . ... . .. . ... . . .
pgp key @ http://files.poelzi.org/pgp.txt
ED80 E53D 5269 4BB1 1E73 3A53 CBF9 A421 0A7B 003D
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.4 (GNU/Linux)
Comment: Using GnuPG with Debian - http://enigmail.mozdev.org

iD8DBQE/+sOVy/mkIQp7AD0RAg5mAJwKD+DTxhmsQu8bzKnzSj5f/p0bjQCgp/Tf
M07tS7uaBFLKi5Z0/IjvSi4=
=doSL
-----END PGP SIGNATURE-----




From try_vanevery_at_mycompanyname at yahoo.com  Thu Jan 15 17:24:02 2004
From: try_vanevery_at_mycompanyname at yahoo.com (Brandon J. Van Every)
Date: Thu, 15 Jan 2004 14:24:02 -0800
Subject: The bigger white book penis (was Re: ProtoCiv: porting Freeciv to
	Python CANNED)
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
	<K_YMb.10994$9k7.204413@news.xtra.co.nz>
	<bu1qq3$cu440$1@ID-207230.news.uni-berlin.de>
	<n22Nb.11299$9k7.210522@news.xtra.co.nz>
	<bu2pgs$d123a$1@ID-207230.news.uni-berlin.de>
	<4004EC9E.1E2E2893@alcyone.com>
	<23891c90.0401140223.344b22af@posting.google.com>
	<100bbb6kj9m03a4@corp.supernews.com>
	<bu4cdk$cv09p$1@ID-207230.news.uni-berlin.de>
	<1AjNb.8936$1e.894@newsread2.news.pas.earthlink.net>
	<bu56oq$d62os$1@ID-207230.news.uni-berlin.de>
	<GxrNb.9363$1e.2036@newsread2.news.pas.earthlink.net>
Message-ID: <bu738d$ei392$1@ID-207230.news.uni-berlin.de>

Andrew Dalke wrote:
> Brandon Van Every wrote:
> > Andrew Dalke wrote:
>>
>>> It's made even worse when you make claims related to your
>>> profession (like "Even 12 years ago, "Computer Graphics: Principles
>>> and Practice" didn't teach texture mapping.
>
>> It didn't.  I have my copy still, and there is no discussion of
>> texture mapping algorithms in it.  It was considered "an advanced
>> subject."
>
> Then you don't own the second edition, which came out a year
> before that "12 years ago" comment you made.  Had you said
> 14 years ago then things would be different.

Oh please FUCK OFF!!!  12 years, 13 years, 14 years, awhile ago!  Why are
you wasting our time on this nonsense???  "Computer Graphics, Principles &
Practice," 2nd. ed, 1990.  ISBN 0-201-12110-7.   Acquired my copy at Cornell
U., spring semester 1991.  NO GODDAMN TEXTURE MAPPING TREATISES.  In those
days, you pulled your "advanced" papers on texture mapping, and unless you
owned very expensive 3D HW you implemented them by hand.  PITA.  Never
bothered.  Still can't stand texture mapping to this day.  What a bunch of
inelegant ugly flat looking crap!

> A slight timing
> error perhaps, but properly you should have used the publication
> date of your book.

Look at what the *original* title of the thread was.  Consider where you've
*taken* it.  *What* is your fucking point???  Your point was, and is, and
will continue to be... ***ME!!!***

I give up!!!  You have won!!!  I am driven screaming from the FUCKING
C.G.D.* NEWSGROUPS, NOT TO RETURN FOR QUITE SOME TIME!!!
AAAAAAAAAAAAAARRRRRRGGHGHGHH!!!!

Wouldn't be the first time, either.  Probably not the last.  Hard for their
founder to stay away forever.  In the meantime, we will be MUTUALLY THANKFUL
for the absence!

-- 
Cheers,                     www.indiegamedesign.com
Brandon Van Every           Seattle, WA

I need a .sig about not suffering fools.



From max at cNvOiSsiPoAnMtech.com  Fri Jan  2 15:03:55 2004
From: max at cNvOiSsiPoAnMtech.com (Maxim Khesin)
Date: Fri, 02 Jan 2004 20:03:55 GMT
Subject: re 
Message-ID: <L8kJb.121167$0P1.98310@twister.nyc.rr.com>

I am studying the re module and still do not understand how to do some 
really simple tasks:
1) say I need to capitalize any word that is between the words 'United' 
and  'of America'. So I do
re.findall|match|search('United .* of America', s)
this may return 'United States of America', but not 'States', which is 
the word of interest.
2) There is a further problem:
even if I had a way to specify 'States' in the example above as the 
matched regex, the sub function proves insufficient: re.sub allows me to 
specify only the replacement string, but not a operator:
re.sub(pat, lambda pat: Capitalize(pat), str)
would have been much more powerful.

are there ways to use re that I missed? is there another module that can 
do these?

thanks,
max.



From latex-bugs at latex-project.org  Thu Jan 29 21:41:13 2004
From: latex-bugs at latex-project.org (latex-bugs at latex-project.org)
Date: Fri, 30 Jan 2004 03:41:13 +0100 (CET)
Subject: hi
In-Reply-To: <200401300241.i0U2f6IA014897@rzdspc1.informatik.uni-hamburg.de>
References: <200401300241.i0U2f6IA014897@rzdspc1.informatik.uni-hamburg.de>
Message-ID: <200401300241.i0U2fDbE016353@sun.dante.de>

Thank you for your message to latex-bugs at latex-project.org.

Sorry, but the latex-bugs email processor cannot handle
MIME attachments. Please resend your problem report with
the contents of latexbug.msg as the body of your message.

-- 



From fBechmann at web.de  Fri Jan  2 05:43:43 2004
From: fBechmann at web.de (Frank Bechmann)
Date: 2 Jan 2004 02:43:43 -0800
Subject: question: Python or Lua for rejuvenation of old PCs?
References: <mailman.16.1072987285.12720.python-list@python.org>
Message-ID: <dbc00a99.0401020243.1f89524c@posting.google.com>

maybe these links help, even if you have to look at the numbers and
charts w/ some care:

http://dada.perl.it/shootout/craps_mem.html
  quite old win2K machine (partly running cygwin tools)
  Python 2.3.2 vs. Lua 5.0 (and Lua 4.0)
  Lua (both versions, Lua 5.0 is even better) lead on memory usage


http://www.bagley.org/~doug/shootout/craps.shtml?xcpu=0&xmem=1&xloc=0&ackermann=1&ary3=3&wc=3&echo=5&except=1&fibo=2&hash=1&hash2=4&heapsort=4&hello=1&lists=3&matrix=3&methcall=5&nestedloop=4&objinst=5&prodcons=1&random=3&regexmatch=4&reversefile=4&sieve=4&spellcheck=4&moments=2&strcat=2&sumcol=3&wordfreq=5
  even older linux machine
  Python 2.1 vs. Lua 4.0
  Python leads on memory usage

having read your application specs FORTH came to my mind, having the
advantage that it is even more crude, so you have even less chances to
intermix both languages. and no one will doubt that it is usefull for
embedded controller tasks.


From cygnus at cprogrammer.org  Sat Jan 31 17:11:44 2004
From: cygnus at cprogrammer.org (Jonathan Daugherty)
Date: Sat, 31 Jan 2004 17:11:44 -0500
Subject: wxPython documentation
In-Reply-To: <401c25a3$0$11357$636a55ce@news.free.fr>
References: <401c25a3$0$11357$636a55ce@news.free.fr>
Message-ID: <20040131221144.GA16935@mail.theserver.ath.cx>

# Where could I find a good documentation about wxPython (a documentation
# which is not for C++ !!!)

There are some wxpython tutorials and documents but the official wxPython
documentation is the wxWindows documenation itself -- wxPython notes are
sprinkled throughout.

-- 

  Jonathan Daugherty
  http://www.cprogrammer.org

  "It's a book about a Spanish guy called Manual, you should read it."
                                                            -- Dilbert



From reply.in.the.newsgroup at my.address.is.invalid  Sat Jan  3 05:41:55 2004
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Sat, 03 Jan 2004 11:41:55 +0100
Subject: Text-to-HTML processing program
References: <slrnbvcm32.122.philh@cabalamat.cabalamat.org>
Message-ID: <ot6dvv42k7vp1gmob7p845ovq2kp3onfd4@4ax.com>

phil hunt:
>Does anyone know of a text-to-HTML processing program, ideally
>written in Python [...] which uses a simple markup language 
>(something like Wikipedia markup would be ideal)?

"reStructuredText is an easy-to-read, what-you-see-is-what-you-get
plaintext markup syntax and parser system. The reStructuredText parser is
a component of Docutils. reStructuredText is a revision and
reinterpretation of the StructuredText and Setext lightweight markup
systems."
http://docutils.sourceforge.net/FAQ.html#what-is-restructuredtext

"Structured Text is a simple plain text markup format used by Zope and
many Zope products, invented by.. JimFulton? ? The idea is to have text
that is easy to read both in source and rendered form."
http://dev.zope.org/Members/jim/StructuredTextWiki/FrontPage/

-- 
Ren? Pijlman


From __peter__ at web.de  Mon Jan 19 15:03:51 2004
From: __peter__ at web.de (Peter Otten)
Date: Mon, 19 Jan 2004 21:03:51 +0100
Subject: Delayed evaluation and setdefault()
References: <buh6j1$bub$1@news.tudelft.nl>
Message-ID: <buhd16$1qd$01$1@news.t-online.com>

Leo Breebaart wrote:

> Hi all,
> 
> I have a question about Python and delayed evaluation.
> 
> Short-circuiting of Boolean expressions implies that in:
> 
>    >>> if a() and b():
> 
> any possible side-effects the call to b() might have will not
> happen of a() returns true, because then b() will never be
> executed.
> 
> However, if I go looking for dictionary keys like this:
> 
>    >>> d = {}
>    >>> d.setdefault('foo', b())
> 
> then b() *does* get executed regardless of whether or not the
> value it returns is actually used ('foo' was not found) or not
> ('foo' was found).
> 
> If b() has side-effects, this may not be what you want at all. It
> would seem to me not too exotic to expect Python to have some
> sort of construct or syntax for dealing with this, just as it
> supports Boolean short-circuiting.
> 
> So I guess my question is twofold: one, do people think
> differently, and if so why?; and two: is there any elegant (or
> other) way in which I can achieve the delayed evaluation I desire
> for setdefault, given a side-effect-having b()?
> 

Lazy evaluation is dangerous as the state of mutable objects may have
changed in the mean time. In your case

if "foo" not in d:
    d["foo"] = b()

should do.

However, if you absolutely want it, here's a slightly more general approach:

<defer.py>
class Defer:
    def __init__(self, fun, *args):
        self.fun = fun
        self.args = args
    def __call__(self):
        """ Calculate a deferred function the first time it is
            invoked, return the stored result for subsequent calls
        """
        try:
            return self.value
        except AttributeError:
            self.value = self.fun(*self.args)
            return self.value

def defer(fun, *args):
    """ Use, e. g., defer(average, 1, 2) to delay the calculation
        of the average until the first time undefer() is called
        with the Defer instance.
    """
    return Defer(fun, *args)

def undefer(value):
    """ Check if value is deferred, if so calculate it, otherwise
        return it unchanged
    """
    if isinstance(value, Defer):
        return value()
    return value

#example usage:

class Dict(dict):
    def setdefault(self, key, value):
        try:
            return self[key]
        except KeyError:
            # it might make sense to further delay the
            # calculation until __getitem__()
            self[key] = value = undefer(value)
            return value

def b(value):
    print "side effect for", value
    return value
dv = defer(b, "used three times")

d = Dict()
d.setdefault("x", defer(b, "a1"))
d.setdefault("x", defer(b, "a2"))
d.setdefault("y", "b")
d.setdefault("a", dv)
d.setdefault("b", dv)
d.setdefault("c", dv)
print ",\n".join(repr(d).split(","))
assert d["a"] is d["b"]

</defer.py>

You will still have to bother with undeferring in *many* places in your
program, so the above would go into the "or other" category. For lazy
evaluation to take off, I think it has to be build into the language. I
doubt, though, that much effort will be saved, as a human is normally lazy
enough to not calculate things until absolutely needed.

Peter



From johngrayson at cox.net  Thu Jan  8 18:55:35 2004
From: johngrayson at cox.net (John Grayson)
Date: Thu, 08 Jan 2004 18:55:35 -0500
Subject: Scrolling graphs in a Tk GUI?
In-Reply-To: <c35rvvcq5i0ev2uf95vv625q0e43e5tj3e@4ax.com>
References: <shiovv499bsp9sba0vb56del4l00nkj1jh@4ax.com>
	<iK0Lb.70248$hf1.267@lakeread06>
	<c35rvvcq5i0ev2uf95vv625q0e43e5tj3e@4ax.com>
Message-ID: <T5mLb.70381$hf1.2818@lakeread06>

Try going to manning.com

mksql at yahoo.com wrote:
> On Wed, 07 Jan 2004 18:36:49 -0500, John Grayson <johngrayson at cox.net> wrote:
> 
> 
>>You'll find an example in Python and Tkinter Programming...
> 
> 
> I can't find any copies to purchase. Every vendor I know is out.
> 



From llothar at web.de  Fri Jan 30 08:55:18 2004
From: llothar at web.de (Lothar Scholz)
Date: 30 Jan 2004 05:55:18 -0800
Subject: easiest transition for a PHP website to move to Python?
References: <mailman.1023.1075441969.12720.python-list@python.org>
Message-ID: <6ee58e07.0401300555.12c07aa3@posting.google.com>

Python Baby <python at hitmedia.com> wrote in message news:<mailman.1023.1075441969.12720.python-list at python.org>...
> I've got a database-driven website that's written entirely in PHP.
> 
> It's all pretty MVC : NOT embedded little calls inside HTML, but
> rather little controller apps in the webroot that merge data with
> HTML templates on the fly.
> 
> But for various reasons (mostly fun) I want to rewrite it in Python.
> 
> There are so many different approaches, though!  Zope, Twisted,
> mod_python, clearsilver, and all the goodies in standard library.
> 
> What would be the SMOOTHEST TRANSITION for a newbie like me to
> rewrite my PHP+MySQL website to Python?
> 
> 

Most important, what can you use ? 
If you are independ, this means have your own dedicated or virtual
server, then i would suggest webware which is the most sophisticated
real python (Zope is not python) solution. Twisted is more a server
framework then a web solution.

If you don't want a app server then use mod_python with one of the ten
web frameworks. Look at www.python-hosting.com for a list. I recommend
Quixote or Sypce.


From http  Wed Jan 21 20:35:01 2004
From: http (Paul Rubin)
Date: 21 Jan 2004 17:35:01 -0800
Subject: Secure Voting software
References: <20040121174434.28446.00000428@mb-m15.aol.com>
Message-ID: <7xvfn4lq9m.fsf@ruckus.brouhaha.com>

piedmontbiz at aol.com (PiedmontBiz) writes:
> What things must I keep in mind when I design a python application to be
> secure?
> 
> Since python is developed using C, can python be free from the
> buffer overrun problems which plague other C programs?

Buffer overruns are just one narrow type of security failure.
Security is really a hard subject and even systems built by experts
often have security holes.  There are various books written on how to
write secure software, and also some HOWTO's.  For systems like voting
machines, there are a lot of non-software issues you have to deal with too.  

The book "Security Engineering" by Ross Anderson is a good place to start
reading if you're interested in the subject.


From engsolnorm at ipns.com  Sun Jan 25 16:38:43 2004
From: engsolnorm at ipns.com (engsol)
Date: Sun, 25 Jan 2004 13:38:43 -0800
Subject: Python and writing a CSV file
References: <mailman.611.1074719029.12720.python-list@python.org>
	<kNDPb.6494$6o4.181@fe2.texas.rr.com>
	<20040121232549.GA28328@mail.theserver.ath.cx>
	<009501c3e07e$80b62e30$97443d42@homebass1>
	<16399.7079.192926.761791@montanaro.dyndns.org>
	<000c01c3e2b7$a6eabcc0$97443d42@homebass1>
	<mailman.767.1075053933.12720.python-list@python.org>
	<cg68105aq9ormbfkt7g4im31dcb16jlno6@4ax.com>
	<mailman.770.1075062592.12720.python-list@python.org>
Message-ID: <1qd810dl9rr7i3n9kb6j3jr2f8kos1ck6n@4ax.com>

On Sun, 25 Jan 2004 14:29:41 -0600, Skip Montanaro <skip at pobox.com>
wrote:

>
>    Norm> writer = csv.writer(file('csv_test.CSV', 'w'))
>    ...
>    Norm> So the question is, where does the extra crlf in the csv file come
>    Norm> from? And how do I get rid of it?
>
>Try opening the CSV file in binary mode:
>
>    writer = csv.writer(file('csv_test.CSV', 'wb'))
>
>Skip

Thanks Skip....works like a charm!
Norm



From max at alcyone.com  Thu Jan 22 06:07:31 2004
From: max at alcyone.com (Erik Max Francis)
Date: Thu, 22 Jan 2004 03:07:31 -0800
Subject: utf8 encoding problem
References: <mailman.634.1074767758.12720.python-list@python.org>
Message-ID: <400FAEF3.5C305961@alcyone.com>

Wichert Akkerman wrote:

> I'm struggling with what should be a trivial problem but I can't seem
> to
> come up with a proper solution: I am working on a CGI that takes utf-8
> input from a browser. The input is nicely encoded so you get something
> like this:
> 
>   firstname=t%C3%A9s
> 
> where %C3CA9 is a single character in utf-8 encoding. Passing this
> through urllib.unquote does not help:
> 
>   >>> urllib.unquote(u't%C3%A9st')
>   u't%C3%A9st'

Unquote it as a normal string, then convert it to Unicode.

>>> import urllib
>>> x = 't%C3%A9s'
>>> y = urllib.unquote(x)
>>> y
't\xc3\xa9s'
>>> z = unicode(y, 'utf-8')
>>> z
u't\xe9s'

-- 
 __ Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
/  \ San Jose, CA, USA && 37 20 N 121 53 W && &tSftDotIotE
\__/ I do not promise to consider race or religion in my appointments.
    I promise only that I will not consider them. -- John F. Kennedy


From __peter__ at web.de  Sat Jan 17 06:35:32 2004
From: __peter__ at web.de (Peter Otten)
Date: Sat, 17 Jan 2004 12:35:32 +0100
Subject: help with cr in reg exp...
References: <4009126a$0$22321$626a54ce@news.free.fr>
Message-ID: <bub6fn$pot$07$1@news.t-online.com>

GrelEns wrote:

> hello,
> 
> i had a trouble with re that i didn't understand (this is a silly example
> to show, to parse html i use sgmllib) :
> having this string :
> 
>>>> s = """<form name="test" method="post" action="test.php">
> <input type="text" name="title" size="1." value="test...">
> <br>
> <a href="help.php">help</a>
> </form>"""
> 
> why do i get :
> 
>>>> p = re.compile("(?=<form|<FORM).*(?=</form>|</FORM>)"); p.findall(s)
> []
> 
> while i was expected this kind of behaviour :
> ['form name="test" method="post" action="test.php">\n<input type="text"
> name="title" size="1." value="test...">\n<br>\n<a
> href="help.php">help</a>']
> 
> which what i nearly get with :
>>>> p = re.compile("(?=<form|<FORM).*(?=</form>|</FORM>)");
> p.findall(s.replace('\n', ''))
> ['<form name="test" method="post" action="test.php"><input type="text"
> name="title" size="1." value="test..."><br><a href="help.php">help</a> ']
> 
> it looks like \n isn't matched by . (dot)* in my re while i though (and
> need) it should, i must be missing something.
> 
> thanks!

Try re.compile(yourpattern, re.DOTALL)

Peter



From afriere at yahoo.co.uk  Tue Jan  6 01:35:49 2004
From: afriere at yahoo.co.uk (Asun Friere)
Date: 5 Jan 2004 22:35:49 -0800
Subject: Beginner question - How to effectively pass a large list
References: <brjn1d$hg9$1@newshost.mot.com>
	<3fde309f$0$19285$626a54ce@news.free.fr>
	<donn-02CC52.16050615122003@nntp3.u.washington.edu>
	<brmf9g$t59$1@newshost.mot.com>
	<donn-9E0285.10012616122003@nntp1.u.washington.edu>
	<broje1$abb$1@newshost.mot.com>
	<38ec68a6.0312181529.729b654@posting.google.com>
	<mailman.331.1071795996.9307.python-list@python.org>
	<1071900300.434091@yasure>
Message-ID: <38ec68a6.0401052235.2c223dca@posting.google.com>

"Donn Cave" <donn at drizzle.com> wrote in message news:<1071900300.434091 at yasure>...
> Quoth Jp Calderone <exarkun at intarweb.us>:

> |The maybe-mutate-maybe-rebind semantics of += lead me to avoid its use
> | in most circumstances.
> 
> This tacky feature certainly ought to be considered for the
> chopping block in version 3, for exactly that reason.
> 

And go back to 'someVariableName = someVariableName + 1' to do
the simple increment?  The various 'assignment' operators are
popular with good reason imho.

Perhaps what should be considered is making sure that operators which
appear to be assignment operators actually (and consistently) behave as 
such.


From tdelaney at avaya.com  Thu Jan  8 17:51:07 2004
From: tdelaney at avaya.com (Delaney, Timothy C (Timothy))
Date: Fri, 9 Jan 2004 09:51:07 +1100
Subject: What psyco is goot at [Was: Rookie Speaks]
Message-ID: <338366A6D2E2CA4C9DAEAE652E12A1DE0106375B@au3010avexu1.global.avaya.com>

> From: Jacek Generowicz
> 
> Samuel Walters <swalters_usenet at yahoo.com> writes:
> 
> > If you'd like to see an example of both the psyco and 
> profile modules in
> > action, let me know and I'll give you some more 
> understandable code that I
> > once wrote to see what types of things psyco is good at optimizing.

As an example, check these pystone results (Python 2.3.3, psyco 1.1.1, Windows 2K SP4). Note I've upped the number of passes ...

The benchmarks with `from psyco.classes import __metaclass__` are interesting - they're counter to what one would expect from the docs - increased memory usage and decreased performance. Is this a known thing Armin, or is something going screwy on my box? It's happening consistently.

Note that psyco.profile() depends heavily on how your code works. I've got one piece of code that performs approx 5 times better with psyco.full(), but actually performs worse with psyco.profile() than without psyco at all!

Unfortunately, I can't make it available, but it's a single pass over a file (line by line), matching and extracting data using various regexes, writing lots of other files, then iterating over the other files to produce even more files. The datasets tend to be very large - 500MB+.

The main functions only get called one time each (which is probably the killer) and the bulk of the work is done inside while loops in those functions. I suspect that if I moved the contents of the main while loops to their own functions psyco.profile() would do a lot better.

No psyco
========

Pystone(1.1) time for 500000 passes = 11.9274
This machine benchmarks at 41920.2 pystones/second

psyco.full()
============

Pystone(1.1) time for 500000 passes = 2.36103
This machine benchmarks at 211772 pystones/second

09:37:27.73  memory usage: 97+ kb

psyco.profile()
===============

Pystone(1.1) time for 500000 passes = 2.41374
This machine benchmarks at 207147 pystones/second

09:39:02.90  memory usage: 50+ kb

psyco.full() with `from psyco.classes import __metaclass__`
===========================================================

Pystone(1.1) time for 500000 passes = 3.2981
This machine benchmarks at 151602 pystones/second

09:40:40.79  memory usage: 107+ kb

psyco.profile() with `from psyco.classes import __metaclass__`
==============================================================

Pystone(1.1) time for 500000 passes = 3.5345
This machine benchmarks at 141463 pystones/second

09:42:13.09  memory usage: 80+ kb

Tim Delaney



From dallasm at aiinet.com  Thu Jan 22 12:28:24 2004
From: dallasm at aiinet.com (Mahrt, Dallas)
Date: Thu, 22 Jan 2004 12:28:24 -0500
Subject: Identifing current function
Message-ID: <AD59566A9D83864F871AE2E52503064001134802@aimail.aiinet.priv>



> -----Original Message-----
> From: Brian Donovan [mailto:john at doe.com] 
> Sent: Wednesday, January 21, 2004 6:22 PM
> To: python-list at python.org
> Subject: Identifing current function
> 
> 
> Hi all,
> 
>   Is there a way to identify the current function. For example:
> 
> class A:
>    def B(self):
>       print current_function_name
> 
> 
> -- 
> http://mail.python.org/mailman/listinfo/python-list
> 

import traceback
def getFuncName():

	# get the stack frame of the caller of this func
	stack = traceback.extract_stack()[-2]
	
	# get the function/method name
	return stack[2]

- 
Dallas S. Mahrt



From skip at pobox.com  Sat Jan 10 16:49:22 2004
From: skip at pobox.com (Skip Montanaro)
Date: Sat, 10 Jan 2004 15:49:22 -0600
Subject: Emacs python mode question
In-Reply-To: <pan.2004.01.10.21.08.16.172000@hotmail.com>
References: <pan.2004.01.10.21.08.16.172000@hotmail.com>
Message-ID: <16384.29538.411489.830261@montanaro.dyndns.org>


    jb> If I should like to go to line 345: how can I do that? Typing M-x
    jb> goto-line and then 345 is a bit cumbersome.  I defines the key Alt-g
    jb> to be goto-line, but it does not work.

Is M-g not bound to goto-line?  You can check for keybindings by typing "C-h
w" then entering the name of a command.

Skip



From CGStartup at earthlink.net  Sat Jan 31 19:49:12 2004
From: CGStartup at earthlink.net (Stan Schwartz)
Date: 31 Jan 2004 16:49:12 -0800
Subject: Programmers Wanted for Computer Graphics Startup Near
	Philadelphia
References: <2da21d6c.0401310807.671be3b7@posting.google.com>
	<bvgs76$i30$1@news.service.uci.edu>
Message-ID: <2da21d6c.0401311649.51a73403@posting.google.com>

Josiah Carlson <jcarlson at nospam.uci.edu> wrote in message news:<bvgs76$i30$1 at news.service.uci.edu>...
> > produced demo output that clearly demonstrates the viability of 
> > my approaches, which I've been showing to potential licensees and 
> > investors.  This demo output is currently being generated through 
> 
> Hey Stan,
> 
> I don't suppose you'd post a link to a bit of demo output?
> 
>   - Josiah

Hi Josiah,
I don't leave the demo output on the web.  For me to temporarily post
it for you to look at, we'd first have to go through a dance that would
involve your signing a non-disclosure.  Over the next couple of days,
I'll send you some more information privately about what I'm working on,
and you can decide whether you want to take it further.

BTW, some examples of my Python work with images, although not
directly related to the startup are at
<http://www.ryze.com/go/metastan> and 
<http://www.ryze.com/postdisplay.php?confid=777&messageid=208102>.
Stan


From PeterAbel at gmx.net  Wed Jan  7 08:20:50 2004
From: PeterAbel at gmx.net (Peter Abel)
Date: 7 Jan 2004 05:20:50 -0800
Subject: Iterating over a binary file
References: <btf5j8$6g26f$1@ID-46268.news.uni-berlin.de>
Message-ID: <21064255.0401070520.7996bac6@posting.google.com>

"Derek" <none at none.com> wrote in message news:<btf5j8$6g26f$1 at ID-46268.news.uni-berlin.de>...
> Pardon the newbie question, but how can I iterate over blocks of data
> from a binary file (i.e., I can't just iterate over lines, because
> there may be no end-of-line delimiters at all).  Essentially I want to
> to this:
> 
> f = file(filename, 'rb')
> data = f.read(1024)
> while len(data) > 0:
>     someobj.update(data)
>     data = f.read(1024)
> f.close()
> 
> The above code works, but I don't like making two read() calls.  Any
> way to avoid it, or a more elegant syntax?  Thanks.

There's an aproach to mimic the following C-statements in Python:

while (result = f.read(1024))
  {
    do_some_thing(result);
  }

>>> def assign(val):
... 	global result
... 	result=val
... 	return val
... 

>>> f=file('README.txt','rb')

>>> while assign(f.read(1024)):
... 	print len(result)
... 

121

>>> f.close()

Regards
Peter


From merkosh at hadiko.de  Mon Jan 26 06:01:58 2004
From: merkosh at hadiko.de (Uwe Mayer)
Date: Mon, 26 Jan 2004 12:01:58 +0100
Subject: use of buffer() function
Message-ID: <bv2s35$5p6$1@news.rz.uni-karlsruhe.de>

Hi,

I was browsing the reference manual to pick up some functions I haven't been
using up until now. I tumbled over the buffer() function. I know what it
does now, but I'm lacking a possible usage szenario.

Can anyone explain the benefits of this function and f.e a usefull example?

Thanks in advance
Uwe



From pythonguy at Hotpop.com  Mon Jan  5 04:39:06 2004
From: pythonguy at Hotpop.com (Anand Pillai)
Date: 5 Jan 2004 01:39:06 -0800
Subject: Py2exe?? Error: Nothing to do?
References: <86df8ed4.0401031028.6edf2381@posting.google.com>
	<86df8ed4.0401032126.4031bcc8@posting.google.com>
Message-ID: <84fc4588.0401050139.79b48d4e@posting.google.com>

Post via a usenet news program. Examples are
Mozilla , Netscape. Dedicated news readers also exist.

If you prefer online posting, try http://www.dbforums.com
which updates its newsgroup databases faster than google.
But you may not find all news items in this forum that
you find here. 

-Anand

nick889 at mail.com (Nick) wrote in message news:<86df8ed4.0401032126.4031bcc8 at posting.google.com>...
> Yes, i did manage to get it to work, thank you.
> 
> Also, i am kinda new to the whole newgroups thing.  I am currently
> posting from google.com and they say it takes several hours before the
> groups are updated.  Is there anyway to make it so that the newgroups
> are like update instantly.


From rha207 at worldnet.att.net  Tue Jan 20 10:18:20 2004
From: rha207 at worldnet.att.net (Ron Alvarado)
Date: Tue, 20 Jan 2004 10:18:20 -0500
Subject: shelve error
Message-ID: <000501c3df68$a7ae0ba0$0b394b0c@computer>

I have Python 2.2 and when I try this program I get a popup with this
message. Can you see what I'm doing wrong? I just want to take some info I
have in a file and (shelve it?).

PYTHONW caused an invalid page fault in
module MSVCRT.DLL at 0167:78012473.
Registers:
EAX=00000002 CS=0167 EIP=78012473 EFLGS=00010246
EBX=00750880 SS=016f ESP=0062cdc4 EBP=0062cdcc
ECX=ffff01f0 DS=016f ESI=00aef68e FS=0f77
EDX=00000000 ES=016f EDI=00aef70e GS=0000
Bytes at CS:EIP:
8a 06 88 07 8a 46 01 c1 e9 02 88 47 01 83 c6 02
Stack dump:
0000ff8e 1e03b1d0 0062ce00 00f1812c 00aef70e 00aef68e ffff01f2 00ada1c0
00aef68e 00add470 00aef70e 00adf700 00000008 00000080 1e030200 0062ce48

This program ass performed an illegal operation and will be shut do.

### Here's the program #########

import cPickle, shelve

hold = []

data = open('inout.txt', 'r')
while 1:
    temp = data.readline()
    if temp == '':
        break
    temp = temp[:-1]
    temp = temp.split('\t')
    hold.append(temp)
data.close()

data = shelve.open('inventory')
for num in hold:
    a = num[0]
    b = num[1]
    c = num[2]
    d = num[3]
    e = num[4]
    f = num[5]
    g = num[6]
    h = num[7]
    i = num[8]
    j = num[9]
    k = num[10]
    l = num[11]
    m = num[12]
    n = num[13]
    data[b] = [a, c, d, e, f, g, h, i, j, k, l, m, n]
    data.sync()
data.close

Ron A




From eric.brunel at N0SP4M.com  Thu Jan 15 03:50:56 2004
From: eric.brunel at N0SP4M.com (Eric Brunel)
Date: Thu, 15 Jan 2004 09:50:56 +0100
Subject: CheckButton  -- modify "check state"
References: <104c369a.0401141314.5c64a727@posting.google.com>
Message-ID: <bu5jq2$2dg$1@news-reader4.wanadoo.fr>

Askari wrote:
> Hi,
>    How do for do a "select()" on a CheckButton in a menu (make with
> add_checkbutton(....) )?
> I can modify title, state, etc but not the "check state". :-(

Assuming you're using Tkinter, the way to do it is to use the variable option 
when you create the menu, and them modify the variable. Here is an example code:

--menu.py------------------------
from Tkinter import *

root = Tk()

## Create the menu bar
menuBar = Menu(root)
root.configure(menu=menuBar)

## Create the menu
menu = Menu(menuBar)
menuBar.add_cascade(label='Menu', menu=menu)

## Create the variable for the check button
myCheckVar = BooleanVar()

## Functions to check/uncheck/print the check state
def check(*whatever): myCheckVar.set(1)
def uncheck(*whatever): myCheckVar.set(0)
def print_option(*whatever): print myCheckVar.get()

## Entries in menu
menu.add_checkbutton(label='Option', variable=myCheckVar)
menu.add_command(label='Check', command=check)
menu.add_command(label='Uncheck', command=uncheck)
menu.add_command(label='Print', command=print_option)

root.mainloop()
---------------------------------

If you do not specify a command for the add_checkbutton, the default action is 
to toggle the check state.

HTH
-- 
- Eric Brunel <eric dot brunel at pragmadev dot com> -
PragmaDev : Real Time Software Development Tools - http://www.pragmadev.com



From harry.g.george at boeing.com  Thu Jan  8 03:11:27 2004
From: harry.g.george at boeing.com (Harry George)
Date: Thu, 8 Jan 2004 08:11:27 GMT
Subject: creating a daemon?
References: <3ffd355c.0@news1.mweb.co.za>
Message-ID: <xqxlloin9lc.fsf@cola2.ca.boeing.com>

bmgx <bmgx_no_sp at mgleesonprop.co.za> writes:

> This is what I am trying to find out, instruction on how to create a
> simple daemon on unix systems(Linux), can't find any info on usual
> sources..
> 

1. The idea is to fork, clean up all the inheritable stuff like files
   and environment vars, and then fork again.  The resulting process
   can then be left running to do the daemon work.  I recall there is
   a daemon.py module somewhere which does this all for you.  Here are
   the basics:

def main(args):
    #---first fork---
    try:
        pid = os.fork()
        if pid > 0:
            #---first parent---
            sys.exit(0)
    except OSError,e:
        print >>sys.stderr, "fork #1 failed %d (%s)" % (e.errno,e.strerror)
        sys.exit(1)

    
    #---make a clean process---
    os.chdir('/')
    os.setsid()
    os.umask(000)
    child_in =open('/dev/null','r')
    child_out=open('/dev/null','w')
    os.dup2(child_in.fileno(), sys.stdin.fileno())
    os.dup2(child_out.fileno(), sys.stdout.fileno())
    os.dup2(child_out.fileno(), sys.stderr.fileno())

    #---second fork---
    try:
        pid = os.fork()
        if pid > 0:
            #---second parent---
            sys.exit(0)
    except OSError,e:
        print >>sys.stderr, "fork #2 failed %d (%s)" % (e.errno,e.strerror)
        sys.exit(1)
    

    #---in clean child---
    x=MyApp()
    x.run()


2. To talk to that daemon, you can use a) files at known locations, b)
   pipes (see popen), c) sockets with ad hoc protocols (see asyncchat
   and SocketServer), d) predefined protocols (see Internet Protocols
   and Services).  The various "server" modules have the setup code
   from "1" above builtin, so you can ignore that level of detail.
   ["see" references can be found in the normal python documentation's
   Library Reference"].

3. Once you have a working daemon, you need a way to start and stop
   it.  You could manually start it each time you need it and then
   "kill" it when done.  More commonly you would do it (in Linux and
   UNIX) via a boot-time initialization script (typically found in
   /etc/init.d).  Each *NIX has its own flavor of setting these up, so
   you need to look at existing services and maybe copy-and-edit a
   working script.  

4. If security is an issue (it probably is), you may also want to hide
   the service behind xinetd.  That is a whole setup story in its own
   right.  And if security is really troublesome, you may need to
   assure the python interpreter itself is safe.  That kind of
   consideration is way out of my league.

-- 
harry.g.george at boeing.com
6-6M31 Knowledge Management
Phone: (425) 342-5601


From sross at connectmail.carleton.ca  Sat Jan  3 16:31:17 2004
From: sross at connectmail.carleton.ca (Sean Ross)
Date: Sat, 3 Jan 2004 16:31:17 -0500
Subject: Integer math question
References: <3987e01c.0401030832.114c6f2a@posting.google.com>
	<11EJb.20461$Vl6.3782481@news20.bellglobal.com>
	<kTEJb.724242$HS4.5376202@attbi_s01>
	<5sFJb.20923$Vl6.3818930@news20.bellglobal.com>
Message-ID: <UuGJb.21252$Vl6.3847011@news20.bellglobal.com>


"Sean Ross" <sross at connectmail.carleton.ca> wrote in message
news:5sFJb.20923$Vl6.3818930 at news20.bellglobal.com...
> "Rainer Deyke" <rainerd at eldwood.com> wrote in message
> news:kTEJb.724242$HS4.5376202 at attbi_s01...
> >>> a = 5
> >>> b = -10
> >>> q,r = divmod(a,b)
> >>> q
> -1
> >>> r
> -5
> >>>
>
> Here, the division algorithm does not apply (b is a negative integer).
> Perhaps there's some other theorem for this case?
> b<r<=0, when b < 0? I don't know.
>

I think you're supposed to do something like this
a = bq + r,      0<= r < |b|
5 = (-10)q + r
-5 = -(-10)q - r
-5 = 10q - r

But, then, q would be 0 and r would be 5. <shrug>





From __peter__ at web.de  Mon Jan 19 04:25:18 2004
From: __peter__ at web.de (Peter Otten)
Date: Mon, 19 Jan 2004 10:25:18 +0100
Subject: "\b" behaviour at end of string,
	was RE: Simple (?) Regular Expression Question
References: <mailman.486.1074470465.12720.python-list@python.org>
Message-ID: <bug7js$676$02$1@news.t-online.com>

Tim Peters wrote:

> [Steve Zatz]
>> Is '@' a special character in regular expressions?
> 
> Nope.
> 
>> I am asking because I don't understand the following:
>>
>> >>> import re
>> >>> s = ' @'
>> >>> re.sub(r'\b@','*',s)
>> ' @'
>> >>> s = ' a'
>> >>> re.sub(r'\ba','*',s)
>> ' *'
> 
> \b matches a "word boundary", meaning it has to have a word character on
> one side (something that matches \w), and a non-word character on the
> other
> (something that matches \W), regardless of order.  ' @' contains two
> non-word characters (' ' and '@'), so \b doesn't match anything in it.  '
> a' contains a non-word character (' ') followed by a word character ('a'),
> so \b matches (an empty string) betwen those two characters.

Playing around with it a bit, I noticed that finditer() runs forever for the
"\b" regular expression:

Python 2.3.3 (#1, Jan  3 2004, 13:57:08)
[GCC 3.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import re
>>> r = re.compile(r"\b")
>>> [m.start() for (i, m) in zip(range(10), r.finditer("alpha"))]
[0, 5, 5, 5, 5, 5, 5, 5, 5, 5]
>>>

Bug or feature?

Peter


From danb_83 at yahoo.com  Mon Jan 26 07:06:26 2004
From: danb_83 at yahoo.com (Dan Bishop)
Date: 26 Jan 2004 04:06:26 -0800
Subject: delta time = time stop - time start
References: <cs9910pcgktdrp1e8abctoptue7braqvqu@4ax.com>
Message-ID: <ad052e5c.0401260406.256aba32@posting.google.com>

engsol <engsolnorm at ipns.com> wrote in message news:<cs9910pcgktdrp1e8abctoptue7braqvqu at 4ax.com>...
> I'm using Python to parse a bunch of s/w test files and make csv files for later report generation by MS ACCESS....(my boss
> loves the quick turn-around compared to C). Each log file may contain one or more 'sessions', and each session may contain
> one or more 'nodes'.
> 
> Each session in the log has an ASCII  start and stop time, as does each node.
> I have the basic parse part done for parameters, errors, etc., but noticed my routine for determining how long each
> session/node took (delta time) was a bit repetitive, so decided to make a 'stand-alone' routine to handle this.
> 
> The time format from the log is in the format of:
> hh:mm:ss
> and is a string with leading zeros where appropiate. Date is never a factor. The longest "delta" is maybe 5 hours.
> 
> The routine I came up with is below, but seems a bit clunky.
> Is there a better way of doing this? I think it relies too much on integers rounding off in the proper direction, a la
> d_time_hr = d_time / 3600 below.

It also relies on -Qold.  Please use the // operator for integer
division.  Or you're going to regret it when you upgrade to Python
3.0.

> Also, this will have to transition to Linux, if that makes a difference.

In your code, it makes no difference.  I'm using a Linux box right
now.

> START CODE:
> 
> import string

Unless you have a very old version of Python, this is no longer
needed; string.atoi has been officially replaced with the "int"
constructor.

> def deltatime(start, stop):
> 
>     t_start = (string.atoi(start[0:2]) * 3600) + (string.atoi(start[3:5]) * 60) + string.atoi(start[6:8])
>     t_stop  = (string.atoi(stop [0:2]) * 3600) + (string.atoi(stop [3:5]) * 60) + string.atoi(stop [6:8])

Rather than count character positions, take advantage of the fact that
the strings are colon-delimited.

      def toSeconds(timeString):
         hour, min, sec = map(int, timeString.split(':'))
         return (hour * 60 + min) * 60 + sec

      t_start = toSeconds(start)
      t_stop  = toSeconds(stop)
      
>     if t_start < t_stop:
>         d_time = t_stop - t_start
>     else:
>         d_time = (86400 - t_start) + t_stop

You can eliminate the if-else test by taking advantage of Python's %
operator

      d_time = (t_stop - t_start) % 86400

>     d_time_hr  =  d_time / 3600
>     d_time_min = (d_time - d_time_hr * 3600) / 60
>     d_time_sec = (d_time - d_time_hr * 3600) - (d_time_min * 60)

Rather than calculate remainders the hard way, use the % operator.  Or
since you need both the quotient and remainder, use the divmod
function.

      d_time_min, d_time_sec = divmod(d_time, 60)
      d_time_hr, d_time_min = divmod(d_time_min, 60)

>     return str(d_time_hr) + 'hr ' + str(d_time_min) + 'min ' + str(d_time_sec) + 'sec'

A more concise way of writing this is

      return '%dhr %dmin %ssec' % (d_time_hr, d_time_min, d_time_sec)

The complete rewritten function is

def deltatime(start, stop):
   def toSeconds(timeString):
      hour, min, sec = map(int, timeString.split(':'))
      return (hour * 60 + min) * 60 + sec
   t_start = toSeconds(start)
   t_stop  = toSeconds(stop)
   d_time = (t_stop - t_start) % 86400
   d_time_min, d_time_sec = divmod(d_time, 60)
   d_time_hr, d_time_min = divmod(d_time_min, 60)
   return '%dhr %dmin %ssec' % (d_time_hr, d_time_min, d_time_sec)

which is still too verbose for my tastes; I would rewrite it as:

def deltatime(start, stop):
   def toSeconds(timeString):
      hour, min, sec = map(int, timeString.split(':'))
      return (hour * 60 + min) * 60 + sec
   d_time_min, d_time_sec = divmod(toSeconds(stop) - toSeconds(start),
60)
   d_time_hr, d_time_min = divmod(d_time_min, 60)
   return '%dhr %dmin %ssec' % (d_time_hr % 24, d_time_min,
d_time_sec)


From paul at prescod.net  Sat Jan 31 20:23:22 2004
From: paul at prescod.net (Paul Prescod)
Date: Sat, 31 Jan 2004 17:23:22 -0800
Subject: Python vs. Io
In-Reply-To: <711c7390.0401311220.763be80a@posting.google.com>
References: <711c7390.0401291301.3f95794@posting.google.com>	<qnkfzdyieg0.fsf@arbutus.physics.mcmaster.ca>	<711c7390.0401301710.4353274@posting.google.com>	<bvf6kc$2v$2@news.service.uci.edu>
	<711c7390.0401311220.763be80a@posting.google.com>
Message-ID: <401C550A.7080106@prescod.net>

I've always presumed that if I wanted an ultra-pure OO language I would 
use Smalltalk. Obviously IO's big difference is prototype rather than 
class-based inheritance. But that's a difference, not (necessarily) a 
benefit. Could you please describe what would attract one to IO over 
Smalltalk?

  Paul Prescod




From alf at calvin.fayauffre.org  Mon Jan  5 09:23:50 2004
From: alf at calvin.fayauffre.org (Alexandre Fayolle)
Date: Mon, 5 Jan 2004 14:23:50 +0000 (UTC)
Subject: UML tools for python
References: <13dc97b8.0312301543.39192aa2@posting.google.com>
Message-ID: <slrnbvisrm.3oo.alf@largo.fayauffre.org>

Le 30-12-2003, Andy Bulka <abulka at netspace.net.au> a ?crit?:
> Whilst almost responding to the 'dream project' thread I decided that
> this post warranted its own thread.  What about a solid UML tool with
> round trip functionality for the Python Community?
>
> Some attempts at reverse engineering python are
>   PyReverse http://www.logilab.org/projects/pyreverse/
<snip>
>  PyReverse is hard to use, misses a lot of
> basic information and then what do you do with the XML files? - who
> will read these?  I have to edit them manually to import them into
> Enterprise Architect

Well, I think the first thing you could do if you have specific problems
with any of the tools you mention is getting in touch with the
developers, and try to talk with them. Since we've never heard of your
problems with pyreverse, there's hardly any chance that we will do
anything for you. Logilab's python-project mailing list is waiting for
your posts (http://lists.logilab.org/mailman/listinfo/python-projects to
subscribe)



> Do we think that having a solid UML tool with full round trip
> facilities plus gorgeous GUI - build specifically for Python is a
> worthy goal?  Is anybody going to bother to build such a tool for
> free?

Now, let's be reasonable. If this what you want (what you really really 
want), since this is the OS world, your options are:
 * code it yourself and share it with others
 * code it with some other people, and share it with others
 * commission (i.e. pay) someone else to code it for you, and share it
 with others
 * wait until someone codes it and shares it with you. 

But just saying "all existing tools suck, we (i.e., I) need someone to 
build some cool free tool with <big list of features>" won't get you
anywhere. 

Happy new year

-- 
Alexandre Fayolle
LOGILAB, Paris (France).
http://www.logilab.com   http://www.logilab.fr  http://www.logilab.org
D?veloppement logiciel avanc? - Intelligence Artificielle - Formations


From exarkun at intarweb.us  Sat Jan 24 12:06:42 2004
From: exarkun at intarweb.us (Jp Calderone)
Date: Sat, 24 Jan 2004 12:06:42 -0500
Subject: sort profile stats by percall
In-Reply-To: <slrnc13out.4ds.missive@homer.easthighschool.net>
References: <slrnc13out.4ds.missive@homer.easthighschool.net>
Message-ID: <20040124170642.GB7002@intarweb.us>

On Sat, Jan 24, 2004 at 03:23:04AM +0000, Lee Harr wrote:
> 
> Is there an easy way to sort the stats returned from
> the hotshot.Profile() by the percall column?
> 

  statsObj.sort_stats('calls')

  Jp

> -- 
> http://mail.python.org/mailman/listinfo/python-list
> 



From donn at drizzle.com  Tue Jan 13 02:18:52 2004
From: donn at drizzle.com (Donn Cave)
Date: Tue, 13 Jan 2004 07:18:52 -0000
Subject: C++ bad-mouthing (was: Why learn Python ??)
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<7xisjh1e3i.fsf@ruckus.brouhaha.com>
	<10064loqc7sd7e3@corp.supernews.com>
	<7xeku496wx.fsf@ruckus.brouhaha.com>
	<donn-9D2291.16343412012004@nntp6.u.washington.edu>
	<7xhdz08xgy.fsf@ruckus.brouhaha.com>
Message-ID: <1073978329.887910@yasure>

Quoth Paul Rubin <http://phr.cx at NOSPAM.invalid>:
...
| The one attempt I know of to write a substantial Python application
| competitive with similar applications written in C was the Grail web
| browser, and AFAIK that was a complete failure.  However, for small to
| medium sized projects which don't have to run fast, Python is great.

Well, egads.  Grail is a Python/Tcl/Tk hybrid, and I think one
of the problems with that it complicates the optimization phase.
Plus the official objective never did seem to be to compete with
similar applications, rather they would say they were primarily
writing a document viewing tool for CRNI and it was just a coincidence
that it happened to be a nice web browser.  Was a bit slow, but did
have some nice touches.

But at any rate, I thought we were talking about huge projects
involving many programmers, and I don't think Grail was of that
sort at all.  I don't know what kind of programmer resources were
allocated to it, but I bet it was actually a smashing success in
those terms.  As for its size, I'd have to look, I have the code
around somewhere, but I'd guess it was smaller than Mailman or Zope.
Small enough that one programmer could become pretty thoroughly
acquainted with the whole thing.

	Donn Cave, donn at drizzle.com


From usenet at -OBFUSCATION-joefrancia.com  Mon Jan 12 10:54:26 2004
From: usenet at -OBFUSCATION-joefrancia.com (Joe Francia)
Date: Mon, 12 Jan 2004 15:54:26 GMT
Subject: [Webware] FormKit - dynamic fields problem
In-Reply-To: <5lb5001v1j64v6kdbteaas235d5sj6lan2@4ax.com>
References: <5lb5001v1j64v6kdbteaas235d5sj6lan2@4ax.com>
Message-ID: <SqzMb.4412625$be.704984@news.easynews.com>

JZ wrote:
> I use Webware and FormKit. I have a problem with dynamic added field
> to the form. The following code creates one input field and two submit
> buttons. I would like to add more (up to 4) input fields after
> pressing "more" button. It does not work and I have no idea how to
> solve it.
> 

You also may want to post this question to the WebWare list, if you 
haven't already:
http://lists.sourceforge.net/lists/listinfo/webware-discuss

If you don't want to join yet another mailing lists, you can access the 
WebWare list in your newsreader by pointing it to news.gmane.org and 
subscribing to gmane.comp.python.webware.


From sandskyfly at hotmail.com  Tue Jan 20 08:38:51 2004
From: sandskyfly at hotmail.com (Sandy Norton)
Date: 20 Jan 2004 05:38:51 -0800
Subject: personal document mgmt system idea
Message-ID: <b03e80d.0401200538.10fcf33a@posting.google.com>

Hi folks,

I have been mulling over an idea for a very simple python-based
personal document management system. The source of this possible
solution is the following typical problem:

I accumulate a lot of files (documents, archives, pdfs, images, etc.)
on a daily basis and storing them in a hierarchical file system is
simple but unsatisfactory:

       - deeply nested hierarchies are a pain to navigate 
         and to reorganize
       - different file systems have inconsistent and weak schemes 
         for storing metadata e.g. compare variety of incompatible 
         schemes in windows alone (office docs vs. pdfs etc.) .

I would like a personal document management system that:

	- is of adequate and usable performance
	- can accomodate data files of up to 50MB
	- is simple and easy to use
	- promotes maximum programmibility
	- allows for the selective replication (or backup) of data 
          over a network
	- allows for multiple (custom) classification schemes
	- is portable across operating systems 

The system should promote the following simple pattern:

    receive file -> drop it into 'special' folder
    
    after an arbitrary period of doing the above n times -> run
application
    
    for each file in folder:
	if automatic metadata extraction is possible:
	   scan file for metadata and populate fields accordingly
	   fill in missing metadata
	else:
	   enter metadata
	store file

    every now and then:
	  run replicator function of application  -> will backup data
						     over a network
	  # this will make specified files available to co-workers
	  # accessing a much larger web-based non-personal version of the
	  # docmanagement system.

My initial prototyping efforts involved creating a single test table
in
mysql (later to include fields for dublin-core metadata elements) 
and a BLOB field for the data itself. My present dev platform is
windows XP pro, mysql 4.1.1-alpha,  MySQL-python connector v.0.9.2
and python 2.3.3 . However, I will be testing the same app on Mac OS X
and Linux Mandrake 9.2 as well.

The first problem I've run into is that mysql or the MySQL
connector crashes when the size of one BLOB reaches a certain point:
in this case an .avi file of 7.2 mb . 

Here's the code:

<code>

import sys, time, os, zlib
import MySQLdb, _mysql


def initDB(db='test'):
    connection = MySQLdb.Connect("localhost", "sa")
    cursor = connection.cursor()
    cursor.execute("use %s;" % db)
    return (connection, cursor)

def close(connection, cursor):
    connection.close()
    cursor.close()
    
def drop_table(cursor):
    try:
        cursor.execute("drop table tstable")
    except:
        pass

def create_table(cursor):
    cursor.execute('''create table tstable 
        (   id      INTEGER PRIMARY KEY AUTO_INCREMENT,
            name    VARCHAR(100),
            data    BLOB
        );''')

def process(data):
    data =  zlib.compress(data, 9)
    return _mysql.escape_string(data)

def populate_table(cursor):
    files = [(f, os.path.join('testdocs', f)) for f in
os.listdir('testdocs')]
    for filename, filepath in files:
        t1 = time.time()
        data = open(filepath, 'rb').read()
        data = process(data)
        # IMPORTANT: you have to quote the binary txt even after
escaping it.
        cursor.execute('''insert into tstable (id, name, data)
			  values (NULL, '%s', '%s')''' % (filename, data))
        print time.time() - t1, 'seconds for ', filepath


def main ():
    connection, cursor = initDB()
    # doit
    drop_table(cursor)
    create_table(cursor)
    populate_table(cursor)
    close(connection, cursor)
    

if __name__ == "__main__":
    t1 = time.time()
    main ()
    print '=> it took total ', time.time() - t1, 'seconds to complete'

</code>

<traceback>

>pythonw -u "test_blob.py"
0.155999898911 seconds for  testdocs\business plan.doc
0.0160000324249 seconds for  testdocs\concept2businessprocess.pdf
0.0160000324249 seconds for  testdocs\diagram.vsd
0.0149998664856 seconds for  testdocs\logo.jpg
Traceback (most recent call last):
  File "test_blob.py", line 59, in ?
    main ()
  File "test_blob.py", line 53, in main
    populate_table(cursor)
  File "test_blob.py", line 44, in populate_table
    cursor.execute('''insert into tstable (id, name, data) values
(NULL, '%s', '%s')''' % (filename, data))
  File "C:\Engines\Python23\Lib\site-packages\MySQLdb\cursors.py",
line 95, in execute
    return self._execute(query, args)
  File "C:\Engines\Python23\Lib\site-packages\MySQLdb\cursors.py",
line 114, in _execute
    self.errorhandler(self, exc, value)
  File "C:\Engines\Python23\Lib\site-packages\MySQLdb\connections.py",
line 33, in defaulterrorhandler
    raise errorclass, errorvalue
_mysql_exceptions.OperationalError: (2006, 'MySQL server has gone
away')
>Exit code: 1

</traceback>

My Questions are:

- Is my test code at fault?

- Is this the wrong approach to begin with: i.e. is it a bad idea to
  store the data itself in the database?

- Am I using the wrong database? (or is the connector just buggy?)


Thanks to all.

best regards,

Sandy Norton


From gerrit at nl.linux.org  Tue Jan 20 06:52:25 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Tue, 20 Jan 2004 12:52:25 +0100
Subject: SystemError while execing bad code
Message-ID: <20040120115225.GA3340@nl.linux.org>

Hi,

I found a cool way to trigger a SystemError:

>>> exec CodeType(0,0,0,0,"",(),(),(),"","",0,"")
XXX lineno: 0, opcode: 0
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "/usr/lib/python2.2/site-packages/", line 0, in
    File "/usr/lib/python2.2/site-packages/", line 0, in
SystemError: unknown opcode

The documentation says:
You should report this to the author or maintainer of your Python
interpreter. Be sure to report the version of the Python interpreter
(sys.version; it is also printed at the start of an interactive Python
session), the exact error message (the exception's associated value) and
if possible the source of the program that triggered the error.

Although it probably shouldn't be taken literally in this case...
...or should it :-)?

Hmm, and this actually *hangs*:
>>> exec CodeType(0,0,0,0,"",(),(),(),"","",2**31-1,"")
XXX lineno: 2147483647, opcode: 0
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "/usr/lib/python2.2/site-packages/", line 2147483647, in

...

But I guess this is a case of "so don't do it" :-)?

yours,
Gerrit.

-- 
263. If he kill the cattle or sheep that were given to him, he shall
compensate the owner with cattle for cattle and sheep for sheep.
          -- 1780 BC, Hammurabi, Code of Law
-- 
PrePEP: Builtin path type
    http://people.nl.linux.org/~gerrit/creaties/path/pep-xxxx.html
Asperger's Syndrome - a personal approach:
	http://people.nl.linux.org/~gerrit/english/



From ben at transversal.com  Wed Jan  7 09:09:15 2004
From: ben at transversal.com (Ben)
Date: Wed, 07 Jan 2004 14:09:15 +0000
Subject: PEP 310 suggestions
References: <3ffbd106$0$15344$afc38c87@news.easynet.co.uk>
	<m3fzer3oqu.fsf@pc150.maths.bris.ac.uk>
Message-ID: <3ffc1304$0$397$afc38c87@news.easynet.co.uk>

Michael Hudson wrote:

> Ben <ben at transversal.com> writes:
> 
> Hmm, that's an idea I hadn't had.  Limiting the "on exit" code to just
> one expression and the disadvantage you mention mean I'm not sure I
> like it that much, though...
> 
>> Any comments? The main reason I like these methods is that they are
>> both more explicit than the PEP, and don't require the addition of
>> any more special functions. However I can see the disadantages as
>> well!
> 
> Well, thanks for your comments, but I'm not sure I want to incorporate
> your ideas... I'll add the "onexit" idea as an alternative.
> 
> Cheers,
> mwh
> 

Cheers for the feedback. I suppose I just wanted to make sure all the
options had been considered ( which you already appear to have done in
great detail ) as this is something which I consider really important for
the language. That and I have an irrational dislike of millions of special
methods :)

Do you have a link to the big discussion you mention? I read the one in the
PEP but thats only a couple of messages long. ( I may be going blind
though!)

Ben
---


From bart_nessux at hotmail.com  Thu Jan  8 22:36:04 2004
From: bart_nessux at hotmail.com (Bart Nessux)
Date: Thu, 08 Jan 2004 22:36:04 -0500
Subject: convert a list to a string
References: <3FFE1E29.20801@hotmail.com> <7xwu81dcr7.fsf@ruckus.brouhaha.com>
Message-ID: <3FFE21A4.7040208@hotmail.com>

Paul Rubin wrote:
> Bart Nessux <bart_nessux at hotmail.com> writes:
> 
>>number = random.sample(range(count), 1)
>>
>>This makes 'number' into a one entry list (I don't know why as 'count'
>>is an integer). Is there an easy way to convert 'number' back to an
>>int?
> 
> 
> number = number[0]
> 
> But why are you using random.sample for that?  And making a list of
> size count, just to throw it away?  It sounds like you just want a
> random number between zero and count.  Do that with:
> 
>    number = random.randint(count)

Forgot to say thanks! the number[0] thing is great!



From ELabuschagne at gmsonline.co.za  Wed Jan 21 08:24:57 2004
From: ELabuschagne at gmsonline.co.za (Etienne Labuschagne)
Date: Wed, 21 Jan 2004 15:24:57 +0200
Subject: Interfacing with Voice modem
Message-ID: <B06B8FEF47ACD7119E720040F4284591047D8A@esrimail.gims.com>

Hi all,

A callcenter-like app that we are writing in Python will need recording
functionality for voice conversations.  I am thinking of doing this through
a voice modem.

Any suggestions on how to interface with a voice modem from Python?

Thanks
Etienne



From tonym1972 at club-internet.fr  Fri Jan  9 12:45:12 2004
From: tonym1972 at club-internet.fr (chitanom chantavong)
Date: Fri, 9 Jan 2004 18:45:12 +0100
Subject: urllib - changing the user agent
References: <8089854e.0401090509.3dd74859@posting.google.com>
Message-ID: <3ffee8ad$0$6974$7a628cd7@news.club-internet.fr>

"Fuzzyman" <michael at foord.net> wrote in message
news:8089854e.0401090509.3dd74859 at posting.google.com...
> I'm writing a function that will query the comp.lang.python newsgroup
> via google groups.......  (I haven't got nntp access from work..)
>
> I'm using urllib (for the first time)..... and google don't seem very
> keen to let me search the group from within a program - the returned
> pages all tell me 'you're not allowed to do that' :-)
>
> I read in the urllib manual pages :
>
> class URLopener( [proxies[, **x509]])
>
> Base class for opening and reading URLs. Unless you need to support
> opening objects using schemes other than http:, ftp:, gopher: or
> file:, you probably want to use FancyURLopener.
> By default, the URLopener class sends a User-Agent: header of
> "urllib/VVV", where VVV is the urllib version number. Applications can
> define their own User-Agent: header by subclassing URLopener or
> FancyURLopener and setting the instance attribute version to an
> appropriate string value before the open() method is called.
>
>
> Could anyone tell me how to subclass this correctly with the version
> attribute set and what text string I should use to mimic Internet
> explorer and/or mozilla ?
>
>
> Ta
>
> Fuzzy

I normally use something like this for crawling webpages.

import urllib
urllib.URLopener.version = 'Mozilla/4.0 (compatible; MSIE 5.5; Windows NT
5.0; T312461)'
urllib.FancyURLopener.prompt_user_passwd = lambda self, host, realm: (None,
None)

Anthony McDonald




From jarausch at skynet.be  Tue Jan 27 12:53:09 2004
From: jarausch at skynet.be (Helmut Jarausch)
Date: Tue, 27 Jan 2004 18:53:09 +0100
Subject: raw_input - why doesn't prompt go to stderr
In-Reply-To: <mailman.816.1075154097.12720.python-list@python.org>
References: <bv2smu$leh$1@nets3.rz.RWTH-Aachen.DE>
	<mailman.816.1075154097.12720.python-list@python.org>
Message-ID: <4016A585.6050109@skynet.be>

Terry Reedy wrote:
> "Helmut Jarausch" <jarausch-remove at igpm.rwth-aachen.de> wrote in message
> news:bv2smu$leh$1 at nets3.rz.RWTH-Aachen.DE...
> 
> 
>>when using an interactive Python script, I'd like the prompt given by
>>raw_input to go to stderr since stdout is redirected to a file.
> 
> 
> This is not the usual behavior, so I presume that you or the code author
> (if not the same) have done some non-standard redirection.

Ofcourse I did the redirection of stdout.
And here is an example which I give in my C++ courses when I tell the
students to use  'cerr' for outputting a prompt (in Python)

FileName= raw_input('please enter the name of data file')
input= open(FileName,'r')
...
   print tons of output

And this is very handy.
While testing I don't redirect stdout and so can see the output 
immediately. Then I just redirect stdout for a 'production' run.

Tell me any advantage in raw_input's prompt is going to stdout instead 
of stderr?

Thanks for your comments,
Helmut.

-- 
Helmut Jarausch

Lehrstuhl fuer Numerische Mathematik
RWTH - Aachen University
D 52056 Aachen, Germany



From http  Fri Jan 16 21:38:13 2004
From: http (Paul Rubin)
Date: 16 Jan 2004 18:38:13 -0800
Subject: YA string interpolation and printing idea
Message-ID: <7x3caf5mga.fsf_-_@ruckus.brouhaha.com>

How about adding a string interpolation method and a some print
methods to strings.

'hello world'.print([fd])  => same as "print 'hello world'".  With optional
                              fd arg, print to file object
'hello world'.write([fd])  => same as "sys.stdout.write('hello world')"
                              i.e. print with no trailing newline
'hello $name'.interp()  => like "'hello %s'%name"
'hello $name'.fprint([fd])  => like ('hello %s'%name).print([fd])
'hello $name'.fwrite([fd])  => like ('hello %s'%name).write([fd])


From francisgavila at yahoo.com  Tue Jan 13 17:42:13 2004
From: francisgavila at yahoo.com (Francis Avila)
Date: Tue, 13 Jan 2004 17:42:13 -0500
Subject: C++ bad-mouthing (was: Why learn Python ??)
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<7xisjh1e3i.fsf@ruckus.brouhaha.com>
	<10064loqc7sd7e3@corp.supernews.com>
	<7xeku496wx.fsf@ruckus.brouhaha.com>
	<donn-9D2291.16343412012004@nntp6.u.washington.edu>
	<40041576.D070723E@engcorp.com>
	<donn-8DC721.09485713012004@nntp6.u.washington.edu>
	<87oet7it2n.fsf@pobox.com>
Message-ID: <1008t48id1hmk43@corp.supernews.com>


John J. Lee wrote in message <87oet7it2n.fsf at pobox.com>...
>Forgot to add: what happened to all those Python interface proposals?
>
>At least one was PEPed, wasn't it?
>
>I suppose it's waiting for Guido-bandwidth.

I think the general opinion of Guido was, yes, we need something like this,
but it's important enough to require his full and undivided attention, and
this must be given later, when a major revision comes up.  I also think he
wasn't fully satisfied with all the options.

I forget where I read this.  Maybe the pep-parade, or maybe one of the peps
themselves?
--
Francis Avila



From steve at ninereeds.fsnet.co.uk  Fri Jan 30 11:03:55 2004
From: steve at ninereeds.fsnet.co.uk (Stephen Horne)
Date: Fri, 30 Jan 2004 16:03:55 +0000
Subject: PEP 327: Decimal Data Type
References: <mailman.1036.1075467073.12720.python-list@python.org>
Message-ID: <6ltk10h30riel0lghd18t5unjco2g26spi@4ax.com>

On Fri, 30 Jan 2004 09:49:05 -0300, "Batista, Facundo"
<FBatista at uniFON.com.ar> wrote:

>I'll apreciate any feedback. Thank you all in advance.

My concern is that many people will use a decimal type just because it
is there, without any consideration of whether they actually need it.

95% of the time or more, all you need to do to represent money is to
use an integer and select appropriate units (pence rather than pounds,
cents rather than dollars, etc) so that the decimal point is just a
presentation issue when the value is printed/displayed but is never
needed in the internal representation.


That said, there are cases where a decimal type would be genuinely
useful. Given that, my only comment on the PEP is that a decimal
literal might be a good idea - identical to float literals but with a
'D' appended, for instance.

I wouldn't mention it now, seeing it as an issue for after the library
itself has matured and been proven, except for the issue of implicit
conversions. Having a decimal literal would add another class of
errors with implicit conversions - it would be very easy to forget the
'D' on the end of a literal, and to get an imprecise float implicitly
converted to decimal rather than the precise decimal literal that was
intended.

I don't know what the solution should be, but I do think it needs to
be considered.


-- 
Steve Horne

steve at ninereeds dot fsnet dot co dot uk


From peter at engcorp.com  Tue Jan  6 07:55:16 2004
From: peter at engcorp.com (Peter Hansen)
Date: Tue, 06 Jan 2004 07:55:16 -0500
Subject: OT: Vertical Tab was Re: indendation question
References: <20031226033210.GA24039@mrna.tn.nic.in>
	<mailman.130.1072540438.684.python-list@python.org>
	<3FF9E883.BC8AB864@engcorp.com>
	<pan.2004.01.05.23.05.44.722929@yahoo.com>
	<3FF9F0D0.3AA099CD@alcyone.com>
Message-ID: <3FFAB034.E8513A36@engcorp.com>

Erik Max Francis wrote:
> 
> Samuel Walters wrote:
> 
> > What exactly *is* a vertical tab?  I don't think I've ever seen it on
> > a
> > keyboard or used in the wild.  I think I may have seen it on the
> > keybindings for a mainframe terminal I once used, but I didn't really
> > dig
> > too deep because, as far as operating the mainframe was concerned, I
> > was a
> > well trained monkey who could check and restart failed jobs.
> 
> It's a whitespace control character, whose precise meaning is, as far as
> I know, left to the implementation.  

I have or once had an absolutely excellent book on serial communications
programming in C (probably called that, too) which made an excellent case
for replacing all the myriad ways in which we represent end-of-line with
a simple \v, since it is used effectively for no other purpose at this point.

The idea will probably get as far as the Dvorak keyboard has, unfortunately...

-Peter


From try_vanevery_at_mycompanyname at yahoo.com  Wed Jan 14 16:46:36 2004
From: try_vanevery_at_mycompanyname at yahoo.com (Brandon J. Van Every)
Date: Wed, 14 Jan 2004 13:46:36 -0800
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
	<40047290$1@news.012.net.il>
	<bu29ea$ct54l$1@ID-207230.news.uni-berlin.de>
	<40051cb3$1@news.012.net.il>
Message-ID: <bu4cm9$dgsp0$1@ID-207230.news.uni-berlin.de>


"G.I.L" <not at all.com> wrote in message news:40051cb3$1 at news.012.net.il...
> Brandon J. Van Every wrote:
> > "G.I.L" <not at all.com> wrote in message
> > news:40047290$1 at news.012.net.il...
> >>
> >> Brandon, why the fuck on Earth couldn't you spend that exact amount
> >> of time doing what you did BEFORE posting and arguing with the
> >> entire newsgroup?
> >
> > Hey GIL, you're here wasting time of your own free will.  Don't look
> > to me to be the purveyor of your quality discourse.  To me this is
> > just hours between implementing stuff.
>
> Partially implementing stuff.
>
> > Although actually, there's another agenda.  I know *someone* out
> > there is going through the same shit I have / I am.  The posts are
> > for their benefit, to give them warnings / inklings.
>
> Are you applying to be a martyr, St. Brandon?

I'm very much alive, thank you.

> >> It
> >> was an unbelievable waste of time, since you've managed to convice
> >> (maybe still wrongfully) all the people that you are completely
> >> clueless.
> >
> > Why, because I turned around a project in 3 weeks while having the
> > flu half the time?
>
> No, because you dumped the project because it was boring.

You're a fool then.  What's your school of advice, keep working on things no
matter how much of a boring waste of time they become?

> This may kill any credit you may have had with people.

Getting "credit" was a goal?  News to me.

> > You try to do something big, you put your money on the line to do it,
> > you fail or don't entirely succeed, you give postmortem, you lay all
> > your cards out for others to examine... *then* I will worry about
> > your opinion.
>
> You state that you will follow only those who fail after putting their own
> money on projects?

Read it again, and put up or shut up.  If you don't have the balls to allow
postmortems of your *own* projects, don't expect me to care about your flak.

-- 
Cheers,                     www.indiegamedesign.com
Brandon Van Every           Seattle, WA

When no one else sells courage, supply and demand take hold.




From llothar at web.de  Mon Jan 12 08:42:22 2004
From: llothar at web.de (Lothar Scholz)
Date: 12 Jan 2004 05:42:22 -0800
Subject: Python is far from a top performer according to benchmark
	test...
References: <ryELb.238$tK2.228@amstwist00> <btn5db$2f8$1@absinth.dialog.net.pl>
	<pan.2004.01.09.21.35.40.132608@yahoo.com>
	<6ee58e07.0401092129.302cb9d4@posting.google.com>
	<pan.2004.01.11.06.08.18.867825@yahoo.com>
Message-ID: <6ee58e07.0401120542.5d79090d@posting.google.com>

Samuel Walters <swalters_usenet at yahoo.com> wrote in message news:<pan.2004.01.11.06.08.18.867825 at yahoo.com>...

> I know very little about numeric processing, and even less about Fortran.
> It's true that my background is in mathematics, but in *pure* mathematics
> where pointer-based languages tend to be helpful, not hurtful.  

Okay seems that you don't know a lot about compiler writing.

A C compiler only knows a little bit about the context so it must
always assume that a data inside a member can be referenced from
another place via an alias pointer.

Fortran does not have this problem so a lot of optimizations can be
done and values can be hold in registers for a much longer time,
resulting in much greater speed.

Remember that on supercomputers a 25% spped enhancement (which a good
fortran compiler is faster then C) can mean a few million dollars of
saved hardware costs. The coding time is not importing compared to the
running time. So real hard numerics are always done in Fortran.

GNU Fortran is a stupid project because it translates the Fortran code
to C.


Python for hardcore numerics, even with PyNumerics, is simply a very
bad solution.


From kkto at csis.hku.hk  Sun Jan  4 21:14:10 2004
From: kkto at csis.hku.hk (Isaac To)
Date: Mon, 05 Jan 2004 10:14:10 +0800
Subject: Why does this fail?
References: <vvhdlm72386b3c@corp.supernews.com>
Message-ID: <7i8ykn3zwt.fsf@enark.csis.hku.hk>

>>>>> "Dave" == Dave Murray <dlmurray at micro-net.com> writes:

    Dave> New to Python question, why does this fail?  Thanks, Dave

    Dave> f = urllib.open(URL)

urllib does not have an open function.  Instead, it has a constructor called
URLopener, which creates an object with such a method.  So instead, you have
to say

  opener = urllib.URLopener()
  f = opener(URL)

Regards,
Isaac.


From __peter__ at web.de  Fri Jan  9 11:42:39 2004
From: __peter__ at web.de (Peter Otten)
Date: Fri, 09 Jan 2004 17:42:39 +0100
Subject: __init__, __slot__ and **keywordargs
References: <m1fzep36xi.fsf@lcpxdf.wm.lc.ehu.es>
	<btluap$89d$01$1@news.t-online.com>
	<m1brpd2trc.fsf@lcpxdf.wm.lc.ehu.es>
Message-ID: <btmlei$4qn$05$1@news.t-online.com>

Zunbeltz Izaola wrote:

> Peter Otten <__peter__ at web.de> writes:
> 
>> 
>> You misspelt: in fact it's __slots__, and it will work as expected. As
>> far
> 
> Hurg!!! :-( This kine of mistakes will become me crazy.
> 
>> as I know slots are an optimization technique that is useful to save some
>> space, when you have many (that would be millions) of small objects. It's
>> not meant as a safety belt for the programmer.
> 
> But, I think it can be considered "a safety belt for the programmer" ,
> When you do

It can, but I think it's contrary to the Python style, which relies heavily
on unit tests. If you to want ensure a limited set of attributes, then why
would you allow both an integer and a Date for the Birthday - if you follow
this road, you end up programming in Java, because it's designed for that
kind of safety. Most Pythonistas think that you are spending too much time
on errors that comprise only a small fraction of what goes wrong in real
programs.

> instance.attribute
> 
> you get and AttributeError if attribute is not in the __slots__
> (It would help to avoid misspells, like i've done!!)

Note that you already get an AttributeError for read access. Write access
aka rebinding is used only in a fraction of all accesses and prohibiting it
for arbitrary attribute names IMHO significantly impairs the usefulness of
Python's object model.

>> In your case, I wouldn't use it, but rather not initialize the attributes
>> not given as constructor - __init__() - arguments. Also, I would consider
>> the ability to provide additional arguments, say "Nickname", not a
>> bug but
> 
> What do you mean with additional arguments? (My code was not the full
> code)

Let's assume you have mandatory arguments Firstname and Surname but want to
allow for other information. A constructor reflecting that would then be

def __init__(self, Firstname, Surname, **OptionalAttributes)

It's up to the clientcode to decide what these optional attributes may be,
so they could vary in different contexts. This in turn makes your class
useful for a broader range of usecases.

Peter



From tjreedy at udel.edu  Thu Jan 15 19:00:28 2004
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 15 Jan 2004 19:00:28 -0500
Subject: python & mathematical methods of picking numbers at random
References: <bu6ptu$kjm$1@solaris.cc.vt.edu>
	<mailman.414.1074195832.12720.python-list@python.org>
	<bu6rvn$njg$1@solaris.cc.vt.edu>
Message-ID: <59idnYa3_eQMtJrd4p2dnA@comcast.com>


"Bart Nessux" <bart_nessux at hotmail.com> wrote in message
news:bu6rvn$njg$1 at solaris.cc.vt.edu...
> Jeff Epler wrote:
> > But why are *you* using
> >     random.sample(range(len(x)), 25)
> > instead of
> >     random.sample(x, 25)
> > ?

> Because it works and it's fast and len(count) changes every drawing.

I think you missed Jeff's point, which is that you are repeating part of
the work that sample tries to do for you.   From the Lib Ref:
"
sample(sequence, k): Return a k length list of unique elements chosen from
the population sequence. Used for random sampling without replacement. New
in version 2.3.

Returns a new list containing elements from the population while leaving
the original population unchanged. The resulting list is in selection order
so that all sub-slices will also be valid random samples. This allows
raffle winners (the sample) to be partitioned into grand prize and second
place winners (the subslices).
"
When you get the sample from range(n), you have to use them as indexes into
x to get the actual list of names.  But the indexing and extraction is what
sample would do if you gave it x instead of range(x)!

Terry J. Reedy




From paul at prescod.net  Tue Jan 20 21:42:58 2004
From: paul at prescod.net (Paul Prescod)
Date: Tue, 20 Jan 2004 18:42:58 -0800
Subject: Pyrex without Python (was Re: calling Pyrex results from C)
In-Reply-To: <20040121014129.GB27424@unpythonic.net>
References: <20040121005749.GA27424@unpythonic.net>
	<400DD5DE.90405@prescod.net>
	<20040121014129.GB27424@unpythonic.net>
Message-ID: <400DE732.3040302@prescod.net>

Jeff Epler wrote:
> 
> 1. my {} keys are broken, so it's perfect to not use C and to use an
> environment where I can't use dicts either
> 2. the people programming small machines are all out do to crazy stuff,
> and so programming mine in "Python" (pyrex) would be along those lines.

;)

If we were to think of Pyrex as its own language unrelated to Python 
we'd have to say it is a language that allows you to span the gamut from 
a "little more high level than C" (i.e. C with GC) to "a little more 
low-level than Python" (a few of Python's features are missing). I think 
that's actually an amazing range and I think more people should try to 
use it as its own language as Kyler is.

On the other hand, using as a language MORE low-level than idiomatic C 
is a fun hack but won't probably save you any time or effort. But 
there's nothing wrong with doing something merely because it is a fun hack!

  Paul Prescod




From clifford.wells at comcast.net  Mon Jan 26 10:27:12 2004
From: clifford.wells at comcast.net (Cliff Wells)
Date: Mon, 26 Jan 2004 07:27:12 -0800
Subject: Class returning None ?
In-Reply-To: <bv38f1$k1l$1@panix1.panix.com>
References: <2r4Rb.286342$e6.11127748@twister2.libero.it>
	<mailman.791.1075107363.12720.python-list@python.org>
	<bv38f1$k1l$1@panix1.panix.com>
Message-ID: <1075130832.13581.1062.camel@devilbox.homelinux.net>

On Mon, 2004-01-26 at 06:33, Aahz wrote:
> In article <mailman.791.1075107363.12720.python-list at python.org>,
> Cliff Wells  <clifford.wells at comcast.net> wrote:
> >
> >from exceptions import Exception
> >class SomeError(Exception): pass
> 
> BTW, there's no need to do this.  ``Exception`` lives in the built-in
> namespace.

Er, explicit is better than implicit?  ;-)

Somehow I never noticed that.

Regards,
Cliff

-- 
So sad, love lies there still
                    -Bauhaus




From kbass at midsouth.rr.com  Wed Jan 21 19:27:21 2004
From: kbass at midsouth.rr.com (kbass)
Date: Wed, 21 Jan 2004 18:27:21 -0600
Subject: Python and writing a CSV file
References: <mailman.611.1074719029.12720.python-list@python.org>
	<kNDPb.6494$6o4.181@fe2.texas.rr.com>
	<20040121232549.GA28328@mail.theserver.ath.cx>
Message-ID: <009501c3e07e$80b62e30$97443d42@homebass1>

I am new to Python and would like to attempt to write to a CSV file. I have
reviewed the documentation at http://www.object-craft.com.au/projects/csv/
for the csv 1.0 module but I didn't see any information referring to writing
(oe creating) a CSV file with this module. Does this module have the
capability to write a CSV file?  Thanks!

Kevin




From arigo at tunes.org  Thu Jan 15 06:20:29 2004
From: arigo at tunes.org (Armin Rigo)
Date: Thu, 15 Jan 2004 11:20:29 +0000
Subject: What psyco is goot at [Was: Rookie Speaks]
In-Reply-To: <338366A6D2E2CA4C9DAEAE652E12A1DE0106375B@au3010avexu1.global.avaya.com>
References: <338366A6D2E2CA4C9DAEAE652E12A1DE0106375B@au3010avexu1.global.avaya.com>
Message-ID: <20040115112029.GA16143@vicky.ecs.soton.ac.uk>

Hello Timothy,

On Fri, Jan 09, 2004 at 09:51:07AM +1100, Delaney, Timothy C (Timothy) wrote:
> The benchmarks with `from psyco.classes import __metaclass__` are
> interesting - they're counter to what one would expect from the docs -
> increased memory usage and decreased performance. Is this a known thing 
> Armin, or is something going screwy on my box? It's happening consistently.

Pystone is a contrieved example of Python code, but I still don't really 
understand what is going on here.  Psyco is definitely much faster with the 
Record class being left as an old-style class, which is the part that I don't 
grasp.

> The main functions only get called one time each (which is probably the
> killer) and the bulk of the work is done inside while loops in those
> functions.

Here too I'm not sure what is going on.  This should not be the killer,
because psyco.profile() is able to detect that a lot of time is spent in the
loops while they are running, and it can start the compilation in the middle
of the execution of a function.  There are several parameters to
psyco.profile(), see the documentation; you could try increasing 'parentframe'
up to 0.5.  This has the effect that time spent in sub-function counts a bit
more as time (indirectly) spent in the calling function as well.  All these
parameters are a bit arbitrary, so I'd love to hear about values that worked
better for you.


A bientot,

Armin.




From none at none.com  Tue Jan 13 09:28:14 2004
From: none at none.com (Derek)
Date: Tue, 13 Jan 2004 09:28:14 -0500
Subject: Why learn Python ??
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<btubno$bd8k6$1@ID-46268.news.uni-berlin.de>
	<100655fo84c2211@corp.supernews.com>
	<btv7gf$btv1p$1@ID-46268.news.uni-berlin.de>
	<87d69og2jl.fsf@pobox.com>
Message-ID: <bu0v9v$c6nr4$1@ID-46268.news.uni-berlin.de>

"John J. Lee" wrote:
> [...]
> > All I know is that there are thousands of extremely large
> > projects written in C++, some consisting of millions of
> > lines of code written by hundreds of developers.  C++,
> > while far from perfect, has proven its worth on a huge
> > scale.  Python, at the very least, has yet to do so.
>
> See a recent thread here listing some fairly large Python
> projects.
>
> Of course, taking lines of code at face value is rather like
> talking about waiting lists instead of waiting times...

Point taken.  I once worked on a project where we implemented a
production system in C++ and then implemented it again in Python for
QA purposes.  It took about 150k lines of C++ code and 10k lines of
Python.  Python took less code because so many modules are bundled
with the language, but the C++ system ran many times faster.  It's all
about picking the right tool for the job.




From jzgoda at gazeta.usun.pl  Sun Jan 18 05:24:32 2004
From: jzgoda at gazeta.usun.pl (Jarek Zgoda)
Date: Sun, 18 Jan 2004 10:24:32 +0000 (UTC)
Subject: [Q] Pyython and curses/ncurses/snack/tinter/...
References: <budi4m$p1b$1@anderson.hrz.tu-chemnitz.de>
Message-ID: <budmsr$a8e$1@nemesis.news.tpi.pl>

Chris Burkert <chris at chrisburkert.de> pisze:

> Now what would you prefer as UI-library? I'm searching for a 
> highlevel library with buttons, text boxes, dialog boxes, 
> progress bars, ...
> 
> I have heard of:
> - curses, ncurses ... low-level
> - snack ... wrapper for newt and slang
> - tinter
> 
> Do you know of any other good library that is widely available?
> 
> I have seen a lot of examples for curses and ncurses but not for 
> the others.
> 
> Snack seems to be only available for Linux and not well documented?!?

Snack should compile on any platform where SLang runs -- except Windows,
of course. If you mean "Windows, Linux, MacOS, MacOSX, OS/2 and any
other system where Python runs", there is no such library. In fact, if
you mean "Windows and Linux", there's nothing here also.

Text-mode interfaces are rather rare animals now.

-- 
Jarek Zgoda
Unregistered Linux User #-1
http://www.zgoda.biz/ JID:zgoda-a-chrome.pl http://zgoda.jogger.pl/


From aienthiwan at mountaincable.net  Sun Jan 18 04:24:03 2004
From: aienthiwan at mountaincable.net (Aienthiwan)
Date: 18 Jan 2004 01:24:03 -0800
Subject: CGI Python user/group permission weirdness
Message-ID: <ead0449f.0401180124.5f0796b7@posting.google.com>

Ok - this one's a baffling one.

I have a Python script run in cgi, it accesses a directory...
/var/foo.

The permissions on /var/foo are 770 with an ownership of mark:dbtest.
The permissions on /var are 755.

In my /etc/group file, www-data is part of the www-data, dbtest,
fusion and cvs groups.

I get an exception thrown with a permission denied on /var/foo.

I have confirmed that it's the www-data user by calling a
os.system('whoami') in my script for debugging.

When I su www-data at the terminal, I can access /var/foo just fine.

What's even weirder, if I switch the ownership of /var/foo to any of
the other groups (except the cvs and the dbtest one), the script
works!

The only inconsistancy is in dbtest and cvs. 

I have attempted to rename them, adjust their ids, pretty much
everything I thought of.

I'm out of ideas.

HELP!

~ Aienthiwan.


From skip at pobox.com  Thu Jan 29 11:26:53 2004
From: skip at pobox.com (Skip Montanaro)
Date: Thu, 29 Jan 2004 10:26:53 -0600
Subject: Get number of iteration
In-Reply-To: <bvbbd7$9rv$01$1@news.t-online.com>
References: <bvbbd7$9rv$01$1@news.t-online.com>
Message-ID: <16409.13389.698178.710013@montanaro.dyndns.org>


    Florian> If I iterate through a list, is there a way I can get the
    Florian> number of the iteration: first, second, third, ...

Sure:

    >>> for i, what in enumerate(["three", "four", "five", "six"]):
    ...   print i, what
    ... 
    0 three
    1 four
    2 five
    3 six

Skip



From candiazoo at comcast.net  Fri Jan  2 14:20:01 2004
From: candiazoo at comcast.net (Zoo Keeper)
Date: Fri, 02 Jan 2004 19:20:01 GMT
Subject: Problem building on BeOS...
References: <NLhJb.31440$I07.78784@attbi_s53>
Message-ID: <BvjJb.717712$HS4.5166026@attbi_s01>

O.K!  After some tips from you folks, I found that the problem ONLY occurs with
line continuation in "extern" statements.  Works fine for DEFINEs...

Mike

In message <NLhJb.31440$I07.78784 at attbi_s53>, Zoo Keeper wrote:
> For some reason, the Python preprocessing balks on the "\" line continuation
> character.  Any ideas/thoughts?  Is it just that my version of gcc is not
> supported?
> 
> I don't "need" numeric in my current project, but it is a nice package to
> have!
>  Apps that do not need to be compiled install and run fine.  Actually,
> SQLite
> built and installed fine...
> 
> Thanks, in advance.
> 
> Mike
> 
> Python 2.2.2 (#13, Dec  6 2002, 00:42:47)
> [GCC 2.9-beos-991026] on beos5
> 
> $ python setup.py build
> running build
> running build_py
> not copying Lib/ArrayPrinter.py (output up-to-date)
> not copying Lib/LinearAlgebra.py (output up-to-date)
> not copying Lib/MLab.py (output up-to-date)
> not copying Lib/Matrix.py (output up-to-date)
> not copying Lib/Numeric.py (output up-to-date)
> not copying Lib/Precision.py (output up-to-date)
> not copying Lib/RandomArray.py (output up-to-date)
> not copying Lib/UserArray.py (output up-to-date)
> not copying Lib/numeric_version.py (output up-to-date)
> not copying Packages/FFT/Lib/FFT.py (output up-to-date)
> not copying Packages/FFT/Lib/__init__.py (output up-to-date)
> not copying Packages/MA/Lib/MA.py (output up-to-date)
> not copying Packages/MA/Lib/MA_version.py (output up-to-date)
> not copying Packages/MA/Lib/__init__.py (output up-to-date)
> not copying Packages/RNG/Lib/Statistics.py (output up-to-date)
> not copying Packages/RNG/Lib/__init__.py (output up-to-date)
> running build_ext
> building '_numpy' extension
> gcc -DNDEBUG -O -IInclude -IPackages/FFT/Include -IPackages/RNG/Include
> -I/boot/home/config/include/python2.2 -c Src/_numpymodule.c -o
> build/temp.beos-5.0.4-BePC-2.2/_numpymodule.o
> In file included from
> /boot/home/Downloads/Numeric-23.1/Src/_numpymodule.c:4:
> /boot/home/Downloads/Numeric-23.1/Include/Numeric/arrayobject.h:234: stray
> '\'
> in program
> /boot/home/Downloads/Numeric-23.1/Include/Numeric/arrayobject.h:239: stray
> '\'
> in program
> /boot/home/Downloads/Numeric-23.1/Include/Numeric/arrayobject.h:241: stray
> '\'
> in program
> /boot/home/Downloads/Numeric-23.1/Include/Numeric/arrayobject.h:244: stray
> '\'
> in program
> /boot/home/Downloads/Numeric-23.1/Include/Numeric/arrayobject.h:247: stray
> '\'
> in program
> /boot/home/Downloads/Numeric-23.1/Include/Numeric/arrayobject.h:251: stray
> '\'
> in program
> /boot/home/Downloads/Numeric-23.1/Include/Numeric/arrayobject.h:253: stray
> '\'
> in program
> /boot/home/Downloads/Numeric-23.1/Include/Numeric/arrayobject.h:255: stray
> '\'
> in program
> /boot/home/Downloads/Numeric-23.1/Include/Numeric/arrayobject.h:257: stray
> '\'
> in program
> In file included from
> /boot/home/Downloads/Numeric-23.1/Src/_numpymodule.c:6:
> /boot/home/Downloads/Numeric-23.1/Include/Numeric/ufuncobject.h:101: stray
> '\'
> in program
> /boot/home/Downloads/Numeric-23.1/Include/Numeric/ufuncobject.h:103: stray
> '\'
> in program
> error: command 'gcc' failed with exit status 1
> $  
> 




From xerolimit126 at earthlink.net  Thu Jan 29 19:29:18 2004
From: xerolimit126 at earthlink.net (Xero Limit 126)
Date: Fri, 30 Jan 2004 00:29:18 GMT
Subject: Easy way to make EXEs...
References: <NMDRb.28013$i4.26542@newsread1.news.atl.earthlink.net>
	<4017C45F.D7501215@engcorp.com>
Message-ID: <yzhSb.1910$jH6.736@newsread1.news.atl.earthlink.net>

"What don't you understand about py2exe?  How it works, or how to actually
execute it?  Or something else?  If you have trouble with it, perhaps there
could be some improvements in the documentation...  but nobody will know
unless you help us figure out what the problem is.

-Peter"


Okay, I created the following setup file:

--- file setup.py
from distutils.core import setup
import py2exe

setup(
console = ["calculator1.py"],
)

Then, I get the following error:

-------------------------------
Traceback (most recent call last):
  File "C:/WINDOWS/Desktop/Programming/Python/Programs/setup", line 4, in ?
    setup(
  File "C:\WINDOWS\DESKTOP\PROGRAMMING\PYTHON\BASE\lib\distutils\core.py",
line 137, in setup
    raise SystemExit, gen_usage(dist.script_name) + "\nerror: %s" % msg
SystemExit: usage: setup [global_opts] cmd1 [cmd1_opts] [cmd2 [cmd2_opts]
...]
   or: setup --help [cmd1 cmd2 ...]
   or: setup --help-commands
   or: setup cmd --help

error: no commands supplied
--------------------------

I also get a pop up window to the effect "Do you want to exit all together,
Yes/No"...

I have a feeling that Im just inputing somthing incorectly, or I have
somthing installed incorrectly...

(Sorry for not going too indepth before)




From klappnase at web.de  Fri Jan 16 06:53:17 2004
From: klappnase at web.de (klappnase)
Date: 16 Jan 2004 03:53:17 -0800
Subject: Tkinter: modal ok in windows, but not in Linux
References: <NWkNb.2858$fU.1773@fe2.columbus.rr.com>
Message-ID: <a7a67196.0401160353.5f7d4ae2@posting.google.com>

DoubleM <mmoum at woh.rr.com> wrote in message news:<NWkNb.2858$fU.1773 at fe2.columbus.rr.com>...
> Hi,
> 
> I'm running Python2.3.3c1 on Mandrake 9.1
> 
> The following code is designed to bring up a window with a button labeled
> "popup".  Clicking on the popup buttons triggers a secondary window with a
> button labeled "ok".  The second window is supposed to be modal - it should
> not be possible to reset the focus back to the first window or close the
> first window without first closing the second.  The program works just fine
> in Windows XP home, but in Linux I can close the first window while the
> second one is still active.
> 
> This seems to be a bug, or am I doing something wrong.  I searched google
> for Tkinter Linux modal, but found nothing relevant.
> 
> Thanks for your help.
> 
> Here's the code, copied and pasted from IDLE.
> 
> #############################
> from Tkinter import *
> 
> makemodal = 1
> 
> def dialog():
>     win = Toplevel()
>     Label(win, text = "Secondary").pack()
>     Button(win, text = "Ok", command = win.destroy).pack()
>     if makemodal:
>         win.focus_set()
>         win.grab_set()
>         win.wait_window()
>     print "dialog exit"
> 
> root = Tk()
> Button(root, text = 'popup', command = dialog).pack()
> root.mainloop()
> #################################
> 
> Mike
> mmoum-xxxspam.woh.rr.com

Hi Mike,

I guess you should use

    root.wait_window(win)

instead of
 
    win.wait_window()

Cheers

Michael


From jjl at pobox.com  Fri Jan  2 18:12:16 2004
From: jjl at pobox.com (John J. Lee)
Date: 02 Jan 2004 23:12:16 +0000
Subject: Simulation library in Python
References: <mailman.33.1073079250.12720.python-list@python.org>
Message-ID: <8765fukkrz.fsf@pobox.com>

Samir Patel <mepython at yahoo.com> writes:
[...]
> If one wants to create a new simulation program, what
> are different packages to use:
[...]
> simulation model creation (preferable data flow) -
> dia, Pyut, OGL

sketch, maybe.

[...]
> graph -
> http://navi.picogui.org/svn/misc/trunk/rtgraph/ 
> http://matplotlib.sourceforge.net/

*Lots* more.  More than you can shake a stick at...  But, when I was
using them, I never found any free graph plotting libraries that did
everything I wanted (Python or no Python).  It's a hard thing to do
well.


> animation - Blender?, VTK, VPython

Pygame.

[...]
> GIS - ?

I think Bernhard Herzog has released some free GIS code in Python
recently.  And IIRC, Fredrik Lundh sells GIS code of some kind.


> Storage - ZODB

xsdb (very new, though).  Plus of course, all the usual relational
suspects, and Gadfly, Sleepycat BSDDB (in standard library), etc.


> Import/Export - ?

- of what?


John


From gerrit at nl.linux.org  Sun Jan 18 11:52:55 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Sun, 18 Jan 2004 17:52:55 +0100
Subject: Some kind of mail->html converter for python?
In-Reply-To: <budunb$gn7ji$1@ID-195770.news.uni-berlin.de>
References: <budunb$gn7ji$1@ID-195770.news.uni-berlin.de>
Message-ID: <20040118165255.GA23339@nl.linux.org>

Jan Kesten wrote:
> Is was looking around for a tool like mhonarc[1], but implemented
> in python (musn't be such powerful). Somebody know such a tool?

You're looking for pipermail.
Ancient, but it works.
There is a dead project for rewriting it, called ng-arch (ng-arch at amk.ca).

yours,
Gerrit.

-- 
215. If a physician make a large incision with an operating knife and
cure it, or if he open a tumor (over the eye) with an operating knife, and
saves the eye, he shall receive ten shekels in money.
          -- 1780 BC, Hammurabi, Code of Law
-- 
PrePEP: Builtin path type
    http://people.nl.linux.org/~gerrit/creaties/path/pep-xxxx.html
Asperger's Syndrome - a personal approach:
	http://people.nl.linux.org/~gerrit/english/



From mgrayson at daedalus.sis.utk.edu  Tue Jan 20 12:51:28 2004
From: mgrayson at daedalus.sis.utk.edu (Matt Grayson)
Date: Tue, 20 Jan 2004 12:51:28 -0500
Subject: simple class question
In-Reply-To: <bujorn$u9g$1@ucsnew1.ncl.ac.uk>
References: <bujorn$u9g$1@ucsnew1.ncl.ac.uk>
Message-ID: <4620DBAA-4B71-11D8-BEDC-000A95983E14@daedalus.sis.utk.edu>

On Jan 20, 2004, at 12:34 PM, C GIllespie wrote:

> Dear all,
>
> I'm new to both python and OOP, so could I ask a simple question.
>
> I have class:
>
> class species:
>     __init__(self,pop=0):
>         self.pop=pop
> Now I want to do something like this:
>
> X=species(pop=10)
> Y=species(pop=X.pop)
> OK, but now I want to update X.pop and have that mirrored in Y.pop, 
> i.e. if
> X.pop=5, Y.pop now equals 5.
>
> What is the best/nicest/simplest way of doing this?

Instead of declaring Y as a new instance of species, just set Y equal 
to X:

	x = species(pop=10)
	y = x
	x.pop = 15
	print y.pop

>
> Many thanks
>
> Colin
>
>
> -- 
> http://mail.python.org/mailman/listinfo/python-list

------------------------------------------------
Matt Grayson

School of Information Sciences, University of Tennessee
-------------------------------------------------




From newsgroups at jhrothjr.com  Sun Jan  4 18:06:15 2004
From: newsgroups at jhrothjr.com (John Roth)
Date: Sun, 4 Jan 2004 18:06:15 -0500
Subject: Creating a capabilities-based restricted execution system
References: <LmmdnUn4seDeGWuiXTWc-w@speakeasy.net>
	<vveg0bb6is2f60@news.supernews.com> <bt7lbp$ovg$1@panix2.panix.com>
	<vveohcpod4oje0@news.supernews.com> <bt82d7$ort$1@panix3.panix.com>
	<vvg0h93ue63c0b@news.supernews.com> <bta2ng$16v7$1@nadya.doma>
Message-ID: <vvh75ienj7g244@news.supernews.com>


"Serge Orlov" <sombDELETE at pobox.ru> wrote in message
news:bta2ng$16v7$1 at nadya.doma...
>
> "John Roth" <newsgroups at jhrothjr.com> wrote in message
news:vvg0h93ue63c0b at news.supernews.com...
> >
> > What I *haven't* seen in this thread is very much consideration of
> > what people want from a security implementation.
>
> I think Sean is talking about his own implementation. I didn't
> see anywhere he said he's going to write general implementation
> for other people. He said what he wants from his implementation.

I see that point, and now that it's been made explicit (I missed
it the first time around, sorry,) I'm ok with it.

> > One problem I've been playing around with is: how would you
> > implement something functionally equivalent to the Unix/Linux
> > chroot() facility? The boundaries are that it should not require
> > coding changes to the application that is being restricted, and it
> > should allow any and all Python extension (not C language
> > extension) to operate as coded (at least as long as they don't
> > try to escape the jail!) Oh, yes. It has to work on Windows,
> > so it's not a legitimate response to say: "use chroot()."
>
> I don't see any unsolvable problems. Could you be more specific
> what is the problem? (besides time, money, need to support
> alternative python implementation, etc...)

Well, I don't see any unsolvable problems either. The biggest
sticking point is that the Unices use hard links to create
a directory tree that has the necessary programs availible.
Windows does not have this capability, so an implementation
would have to build a virtual directory structure, intercept all
paths and map them to the virtual structure backwards and
forwards.

The reason I find it an interesting problem is that I can't see
any way to do it with the kind of "generic" facility that was
in the Python Restricted execution facility,  at least without a
complete redesign of the file and directory functions and
classes in the os module. Without that, it would
require code in the C language implementation modules.
Right now the file and directory management modules are a
real mess.

John Roth
>
> -- Serge.
>
>




From kamikaze at kuoi.asui.uidaho.edu  Fri Jan  2 16:34:12 2004
From: kamikaze at kuoi.asui.uidaho.edu (Mark 'Kamikaze' Hughes)
Date: 2 Jan 2004 21:34:12 GMT
Subject: ANN: Python Language Reference
References: <b16e4ef7.0312260911.42e26052@posting.google.com>
	<slrnbuqs3s.t6.t_therkelsen@abattoir.2-10.org>
	<cb035744.0312270925.6d7b5f74@posting.google.com>
	<bskgj5$gb6$1@panix2.panix.com>
	<cb035744.0312290109.156cd633@posting.google.com>
Message-ID: <slrnbvbouk.2i08.kamikaze@kuoi.asui.uidaho.edu>

Will Stuyvesant <hwlgw at hotmail.com>
wrote on 29 Dec 2003 01:09:18 -0800:
>> [Aahz]
>> That's why you should use Lynx.  Then you don't have any options.  ;-)
> But isn't Lynx text-only?  I want to see the pics!  Even though I am
> not the kind of pervert that want to do things to them with the mouse.

  Opera can be completely keyboard-driven.  And to search, you can type
/TEXT, just like you would in lynx or any other proper viewing or
editing tool.

-- 
 <a href="http://kuoi.asui.uidaho.edu/~kamikaze/"> Mark Hughes </a>
"God, I think. God. He doesn't answer, and I'd be justifiably scared--but not
 in a panic!--if he did, since I would know it really was Resuna, or a tiny
 brain tumor, or some boo-boo in my mix of neurotransmitters." -John Barnes


From ny_r_marquez at yahoo.com  Sat Jan  3 08:49:36 2004
From: ny_r_marquez at yahoo.com (R.Marquez)
Date: 3 Jan 2004 05:49:36 -0800
Subject: Rekall Binary
References: <8a27e309.0312310529.3c1f43a8@posting.google.com>
	<bsvel2$4n2$1@news.nems.noaa.gov>
	<8a27e309.0401010633.20271486@posting.google.com>
	<6ee58e07.0401011433.5ce91221@posting.google.com>
Message-ID: <8a27e309.0401030549.7e88a350@posting.google.com>

llothar at web.de (Lothar Scholz) wrote in message news:<6ee58e07.0401011433.5ce91221 at posting.google.com>...

> "The Kompany" wasn't able to pay the developer for month with non GPL
> software, why do you think they can do it with GPL now (if you say
> yourself that it will be less then in the BOS days) ?

Yes, I think the Kompany is in a difficult spot.  I think they waited
too long to release Rekall as GPL.  The reality today is that we live
in the shadows of a huge monoply.  Basically, the only way that I (and
many others) see to compete with an application that is part of that
monopoly is through Open Source/Free software.

I am not against closed source or proprietary software in principle
(except on the Operating System layer where I think that closed source
has no place since it prevents a level playing field).  I am happy
that developers have the choice.  But, until the grip of the monopoly
is relaxed, or Linux takes off, I see no point in trying to compete
with them that way.

There are already products appearing on the same space that are going
to give Rekall even more competition in the cross platform space (e.g.
Omins Studio, Kylix, etc).  I want to see Rekall succeed, mainly
because it uses Python.  So, at this point I think it would be better
for the developers to provide it for free and build up a loyal base of
users and bug/patch submitters.

> In fact i believe that a main stream desktop tool like "Rekall" has no
> future when it must live on support contracts only. If you need
> support then the product has an error, but i don't want to use
> errounous software. This is the reason why GPL does not work for a lot
> of software products.

I think Rekall has great potential.  With a little imagination and
creativity it could offer things such as a plug in mechanism that
would allow it to perform many things beyond the basics.  The
developers could offer some of these pluggins in a closed source
fashion if they chose, without alienating the rest of the Rekall
community, and without sacrificing quality.

Any way, this are my two cents worth.

-Ruben


From cpl.19.ghum at spamgourmet.com  Sun Jan  4 07:31:42 2004
From: cpl.19.ghum at spamgourmet.com (Harald Massa)
Date: Sun, 4 Jan 2004 13:31:42 +0100
Subject: Scripting C++ Game AI object using Python Generators
References: <bt8tk4$bnu$1@news.service.uci.edu>
Message-ID: <Xns94668ADB6F5ADcpl19ghumspamgourmet@62.153.159.134>

Nick,

I am not able to understand your request fully (problem on my side, I'm not 
into Game Programming) ...

but many of your keywords I heard last time in a talk by Chris Tismer, 
speaking about http://www.stackless.com/ stacklass Python at Europython in 
Charleroi.

Maybe you should look there and maybe send your request directly to him? I 
saw him demonstrating a large game application with microthreads and 
generators and whatsoever (I just remember the words :)) )

Harald


From mhammond at skippinet.com.au  Mon Jan 19 17:46:08 2004
From: mhammond at skippinet.com.au (Mark Hammond)
Date: Tue, 20 Jan 2004 09:46:08 +1100
Subject: Multithreaded COM server problem...
In-Reply-To: <et0f005fm32gh5ovq67bd2e9ihalbiaa9m@4ax.com>
References: <5a90009ufdd66okc8osajrn1a5kokp86mk@4ax.com>
	<btpug4$1oag$1@arachne.labyrinth.net.au>
	<gdv100hgp4tgnclf0c4a4nlr58npi5q3ir@4ax.com>
	<bttcff$qs1$1@arachne.labyrinth.net.au>
	<0pr700ddfdf3op14oulk7u82cthaped040@4ax.com>
	<bu7h15$2d9k$1@arachne.labyrinth.net.au>
	<et0f005fm32gh5ovq67bd2e9ihalbiaa9m@4ax.com>
Message-ID: <buhmnr$s6g$1@arachne.labyrinth.net.au>

John Lull wrote:
> Now I'm *really* confused.
> 
> Perhaps I need to clarify a bit. The sleep() method in my sample
> server is a perhaps-too-simplified substitute for what the real server
> is doing. It provides a variety of high-level operations on a piece of
> hardware. Some of the operations take as long as several dozen
> seconds, others take a millisecond or so. I need the client to block
> waiting for completion of each operation, regardless of how long the
> operation takes. I cannot break one of the long operations up into a
> series of calls from the client -- it must be implemented as a single
> call. My example would, perhaps, have been clearer if I'd named the
> method someLongRunningMethod() instead of sleep().

Is there any way you can do it asynchronously?  The main thread spawns a 
second thread to do the work.  The main thread then spins around a 
MsgWaitForMultipleObjects, with an object set by the second thread.  The 
main thread will then be able to run a message pump, but also detect 
when the second thread is done.

Apart from that, I am afraid I am out of ideas.  I believe however that 
you are hitting pure COM issues, and nothing related to Python.  Looking 
for the answer beyond the Python world may be fruitful.

Mark.



From rodrigob at elo.utfsm.cl  Wed Jan 28 21:44:22 2004
From: rodrigob at elo.utfsm.cl (Rodrigo Benenson)
Date: Wed, 28 Jan 2004 23:44:22 -0300
Subject: Web Service in Python
References: <87hdyffzlp.fsf@tulip.whu.ca>
Message-ID: <40186fa5_1@nova.entelchile.net>

what do you call "web service" ?
have you looked www.twistedmatrix.com ?

"Peter Wu" <peterwu at hotmail.com> escribi? en el mensaje
news:87hdyffzlp.fsf at tulip.whu.ca...
> I'd like to write a Web Service in Python just for my personal interest
> now. Is there any reference or document on this?
>
> -- 
>        ,,,
>       (o o)       Peter Wu
> ---ooO-(_)-Ooo--- Powered by GNU/Linux 2.4.22




From peter at engcorp.com  Fri Jan  9 17:09:37 2004
From: peter at engcorp.com (Peter Hansen)
Date: Fri, 09 Jan 2004 17:09:37 -0500
Subject: Straw poll on Python performance (was Re: Python is far from a top 
 performer ...)
References: <ryELb.238$tK2.228@amstwist00>
	<3fff234a$0$129$e4fe514c@dreader3.news.xs4all.nl>
Message-ID: <3FFF26A1.943DEA84@engcorp.com>

Iwan van der Kleyn wrote:
> 
> In other words: it would be nice if Python on average would run faster
> so the need for optimisation would lessen. 

I disagree with the above.  My opinion has long been that Python runs 
adequately fast and that few people should need to spend much time on 
optimization.  Maybe that sort of view should be put to the test.

This is my "straw poll" question:

  Do you spend a "significant" amount of time actually optimizing your 
  Python applications?  (Significant is here defined as "more than five
  percent of your time", which is for example two hours a week in a 
  40-hour work week.)

Note the distinction between "actually optimizing" and "worrying about
optimization" and such things.  If you pause briefly during coding and 
rewrite a line to use a more efficient idiom, I don't consider that to be
"optimization" for purposes of this question.  Optimization would require
roughly (a) noticing that performance was inadequate or actual profiling
your code, and (b) rewriting specifically to get adequate performance.
Algorithmic improvements that you would make regardless of implementation
language do not qualify, and wasting time optimizing a script that you
run once a year so it takes ten seconds instead of fifteen also does not
qualify because you certainly didn't need to do it...

Yes or no answers suffice, but feel free to follow up with a paragraph
qualifying your answer (or quantifying it!).  :-)

-Peter


From leo at lspace.org  Thu Jan 22 04:45:06 2004
From: leo at lspace.org (Leo Breebaart)
Date: Thu, 22 Jan 2004 09:45:06 +0000 (UTC)
Subject: Side note: Praise to the contibuters to this group
References: <DTFPb.15072$AA6.9820@fed1read03>
Message-ID: <buo632$5ru$1@news.tudelft.nl>

"Amy G" <amy-g-art at cox.net> writes:

> I just wanted to take a second and thank all of the contributors to this
> awesome newsgroup.

    "You know, some statements just _require_ that a small amount
     of bandwidth be sacrificed to the "Me too" gods, and that's
     one of 'em. Yeah, what she said."
                     
                     -- William December Starr on rec.arts.sf.written

-- 
Leo Breebaart  <leo at lspace.org>


From RAV at ns.artphila.com  Wed Jan 28 03:30:53 2004
From: RAV at ns.artphila.com (RAV at ns.artphila.com)
Date: Wed, 28 Jan 2004 10:30:53 +0200
Subject: RAV AntiVirus scan results
Message-ID: <200401280830.i0S8UrLr005530@ns.artphila.com>


RAV AntiVirus for Linux i686 version: 8.3.2 (snapshot-20020108)
Copyright (c) 1996-2001 GeCAD The Software Company. All rights reserved.
Registered version for 2 domain(s).
Running on host: ns.artphila.com

-----------------------
 RAV Antivirus results
-----------------------

The infected file was saved to quarantine with name: 1075278653-RAVi0S8UmLr005525.
The file (part0002:file.zip)->file.pif attached to mail (with subject:MAIL DELIVERY SYSTEM) sent by python-list at python.org to phila at artphila.com, 
is infected with virus: Win32/Mydoom.A at mm.
Cannot clean this file.
Cannot delete this file (most probably it's in an archive).
The mail was not delivered because it contained dangerous code.

------------------------
this is a copy of the e-mail header:




Scan engine 8.11 () for i386.
Last update: Tue Jan 27 05:03:51 2004
Scanning for 89279 malwares (viruses, trojans and worms).

To get a free 60-days evaluation version of RAV AntiVirus v8
(yet fully functional) please visit:

   http://www.ravantivirus.com




From michael at foord.net  Tue Jan 13 03:50:54 2004
From: michael at foord.net (Fuzzyman)
Date: 13 Jan 2004 00:50:54 -0800
Subject: Python Utils - A simple config file parser and output object
References: <8089854e.0401070044.1e8116ad@posting.google.com>
	<8089854e.0401090212.4826925d@posting.google.com>
	<Xns946BDA7D0E054JanC@213.119.4.35>
Message-ID: <8089854e.0401130050.68273bac@posting.google.com>

[snip..]
> 
> Some news servers allow connections on port 80 or other alternatives.
> (The free news.readfreenews.net server does, but it doesn't allow posting,)

Interesting... I wonder if I'll be able to configure free agent to read from it :-)

> 
> Also comp.lang.python is linked to the python mailing list:
> <http://python.org/community/lists.html>

I don't think I could cope with all of this group by email... but thanks.

Fuzzyman


From jacek.generowicz at cern.ch  Tue Jan 13 04:07:44 2004
From: jacek.generowicz at cern.ch (Jacek Generowicz's alter ego)
Date: 13 Jan 2004 10:07:44 +0100
Subject: Why learn Python ??
References: <40029dad$0$28706$a729d347@news.telepac.pt>
	<btubno$bd8k6$1@ID-46268.news.uni-berlin.de>
	<tyf1xq5fbdb.fsf@pcepsft001.cern.ch> <87hdz0g2zk.fsf@pobox.com>
	<tyfwu7wdxrp.fsf@pcepsft001.cern.ch>
Message-ID: <tyfsmikdxnj.fsf@pcepsft001.cern.ch>

Jacek Generowicz <jacek.generowicz at cern.ch> writes:

> jjl at pobox.com (John J. Lee) writes:
> 
> > Jacek Generowicz <jacek.generowicz at cern.ch> writes:
> > [...]
> > > If you want to perform miracles, then learn Lisp. If you
> > > merely want to write programs that rock, then learn Python.
> > [...]
> > 
> > ...and then somebody argues that macros aren't a programming language
> > feature, but a harmful means of inventing new languages, and then we
> > get into that endless macro thread again...
> 
> Well they're all Nazis.

Godwin's Law !

You lose !

Nah na-na naaa nah !

Game over.

(And I'll predend I've never heard of Quirk's Exception, so I'm outa
here.)



From tim.one at comcast.net  Sat Jan 24 16:38:46 2004
From: tim.one at comcast.net (Tim Peters)
Date: Sat, 24 Jan 2004 16:38:46 -0500
Subject: Perl vs. Python for text manipulation
In-Reply-To: <20040124185827.GE32445@unpythonic.net>
Message-ID: <LNBBLJKPBEHFEDALKOLCOEMNIIAB.tim.one@comcast.net>

[Jeff Epler]
> The "unlocked I/O" mentioned earlier refers to locking inside the
> standard C library, so Python can't avoid it except by calling
> non-portable functions such as getc_unlocked* or by using lower-level
> I/O primitives such as posix read(2)/write(2).

Current Pythons do use getc_unlocked() on platforms that have it.

...

> * Actually, my getc_unlocked() manpage says that the function is in
>   POSIX.1, so this may be as portable as read/write would be

Alas, it isn't.  Python uses read()/write() on all platforms (there is no
known Python platform that doesn't supply them).  getc_unlocked() is rarer.
See fileobject.c for the dreadful hack used if getc_unlocked() isn't
available (but, hack or not, on some platforms that's faster than using
getc_unlocked; there are #defines you can play with to try it both ways).




From adalke at mindspring.com  Tue Jan 13 16:43:51 2004
From: adalke at mindspring.com (Andrew Dalke)
Date: Tue, 13 Jan 2004 21:43:51 GMT
Subject: Python is far from a top performer according to benchmark
	test...
References: <ryELb.238$tK2.228@amstwist00>
	<6ee58e07.0401092129.302cb9d4@posting.google.com>
	<pan.2004.01.11.06.08.18.867825@yahoo.com>
	<bttu62$gdh$1@newstree.wise.edt.ericsson.se>
	<btvsvl$pu7$1@panix3.panix.com>
	<95aa1afa.0401130424.49749912@posting.google.com>
	<tyf65fgdm81.fsf@pcepsft001.cern.ch>
Message-ID: <rEZMb.7748$1e.2298@newsread2.news.pas.earthlink.net>

Jacek Generowicz, quoting Kent Pitman
> --
> ...Please don't assume Lisp is only useful for Animation and Graphics,
> AI, Bioinformatics, ... just because these are the only things they
> happened to list.

And as I continue to point out, *Python* is more often used in
bioinformatics than Lisp, and Perl dominates that field, followed
by C/C++ then Java a distant third.

                    Andrew
                    dalke at dalkescientific.com




From dialtone#NOSPAM#.despammed at aruba.it  Fri Jan 16 18:18:26 2004
From: dialtone#NOSPAM#.despammed at aruba.it (Valentino Volonghi aka Dialtone)
Date: Sat, 17 Jan 2004 00:18:26 +0100
Subject: Make a function call itself after set amount of time
References: <bu0v1v$qio$1@solaris.cc.vt.edu>
Message-ID: <87isjbv5x9.fsf@vercingetorix.caesar.org>

Bart Nessux <bart_nessux at hotmail.com> writes:

> How do I make a function call itself every 24 hours. Also, is there a
> way to start the program automatically w/o depending on the OS
> functions like 'Task Scheduler' or 'Start Up Items'... this is on
> Windows 2k and xp. Below is an example of what I'm trying to do.
[snip]

Never seen twisted? Here is a little tip:

from twisted.internet import reactor
def doSomething(mystring):
    print mystring
    reactor.callLater(5, doSomething, mystring)
doSomething("ciao")
reactor.run()

Twisted also has a lot of already implemented protocols for almost
everything related to net so maybe you can think of a new version of
your app using twisted's protocols.

www.twistedmatrix.com

-- 
Valentino Volonghi, Regia SpA, Milan
Linux User #310274, Gentoo Proud User


From merkosh at hadiko.de  Mon Jan 19 19:43:24 2004
From: merkosh at hadiko.de (Uwe Mayer)
Date: Tue, 20 Jan 2004 01:43:24 +0100
Subject: speedy Python strings?
Message-ID: <buhtjb$ida$1@news.rz.uni-karlsruhe.de>

Hi,

thanks to previous help my wrapper for an abstract file type with variable
record length is working now.
I did some test runs and its awfully slow:

I didn't want to read in the whole file at once and I didn't like to read it
step by step (contains 32 bit length terminated strings (Delphi) and 32bit
integers), so I read in i.e. 2MB, work on that buffer and if the buffer
goes empty i load some more 2MB, etc.
For this buffer I use ordinary strings:

class myFile(file):
        def read(self, *args):
                ...
                self.buffer += file.read(self, *args)
                ...

and after reading information from the buffer I remove the read part from
it:
        
        text = struct.unpack("L", self.buffer[:4])
        self.buffer = self.buffer[4:]

During debugging I saw the program accelerating when the buffersize
<len(self.buffer) > grew smaller, thus my conclusion: since strings are
immutable the string operations are so slow.

I tested different sizes of the buffer and it performed best when I didn't
use that buffering system (which is sad, since I spend so much time on it).

Is there anything else I can use instead of normal strings that'll speed
this up?
What do you suggest how to deal with this situation? Do you suggest I remove
any buffering of the data?

Thanks for any comments
Yours
Uwe


From tzot at sil-tec.gr  Fri Jan 16 08:49:16 2004
From: tzot at sil-tec.gr (Christos TZOTZIOY Georgiou)
Date: Fri, 16 Jan 2004 15:49:16 +0200
Subject: TUPLE & LIST
References: <%7xNb.55$Uw3.50@newsr2.u-net.net><cbad00ljgqjc1dpm4quo8skjd3obc2m154@4ax.com>
	<mailman.407.1074189765.12720.python-list@python.org>
	<100dpuer745vfa0@corp.supernews.com>
Message-ID: <fmqf00d1elu96ifmvr0ggn7lu5sresh2gv@4ax.com>

On Thu, 15 Jan 2004 14:18:36 -0500, rumours say that "Francis Avila"
<francisgavila at yahoo.com> might have written:

>
>Gerrit Holl wrote in message ...
>>Christos TZOTZIOY Georgiou wrote:
>>> Examples:
>>> Use a list for a list of names.
>>> Use a tuple for (x,y) coordinates in some area.
>>> Use a list of (name,phone,address) tuples for your poor man's address
>>> book which you will implement in python.
>>
>>What if someone moves away?
>>That is, I think one could better use a mutable type for the address book.
>
>That's why it's a "poor man's" address book. :)

Thanks, Francis :)

To Gerrit: if the context was "help me make an address book", I believe
it is obvious I wouldn't suggest what I suggested.  It was just an
example of concurrent tuple and list usage, where list stands for
database table and tuple for database row...
-- 
TZOTZIOY, I speak England very best,
Ils sont fous ces Redmontains! --Harddix


From buzzard at urubu.freeserve.co.uk  Fri Jan 30 23:21:45 2004
From: buzzard at urubu.freeserve.co.uk (Duncan Smith)
Date: Sat, 31 Jan 2004 04:21:45 -0000
Subject: timeit
Message-ID: <bvfa7b$6jc$1@newsg1.svr.pol.co.uk>

This is possibly a stupid question, but I need to get this working quickly,
and I guess I'm just too tired / pressured to see what I'm doing wrong.
Clearly (from the output below) I can't pass the statement to an instance of
timeit.Timer, but I can execute it using exec().  Any idea what I need to do
to get this timed (using timeit).  Cheers.

>>> import SDC_table
>>> import subtract
>>> import timeit
>>> t = SDC_table.RandomTable(1, 12, (2,3,4))
>>> s = """\
p = subtract.p_risk(t.values, 10)
"""
>>> tim = timeit.Timer(stmt=s)
>>> tim.timeit(10)

Traceback (most recent call last):
  File "<pyshell#119>", line 1, in -toplevel-
    tim.timeit(10)
  File "C:\Python23\lib\timeit.py", line 158, in timeit
    return self.inner(it, self.timer)
  File "<timeit-src>", line 6, in inner
NameError: global name 'subtract' is not defined

# yet
>>> exec(s)
>>> p
0.242621453769059




From gagenellina at softlab.com.ar  Mon Jan  5 20:17:30 2004
From: gagenellina at softlab.com.ar (Gabriel Genellina)
Date: Mon, 05 Jan 2004 22:17:30 -0300
Subject: Quck question
In-Reply-To: <3125790e.0401051610.5e24de28@posting.google.com>
Message-ID: <5.2.1.1.0.20040105220232.0270eb30@192.168.0.115>

At 5/1/2004 16:10, you wrote:

>I have the following information in a file :
>r1kcch    Serial0/0/0    propPointToPointSerial
>Mon Jan 5 13:15:03 PST 2004 InOctets.1    0
>Mon Jan 5 13:15:05 PST 2004 OutOctets.1   0
>
>I want to be able to extract each line into a comma delimited list.

...into a list. The you may *show* the list in a comma-delimited format.

>Bellow i am trying to print out my list print currentList but nothing
>is comming out.  I added a line after print test to make sure the file
>has the information.  Can someone help me with this?
>
>
>#Read a file
>true = 1

Notice that True (capitalized) is a builtin in v2.3

>in_file = open("test.txt","r")
>text = in_file.read()

This reads the full contents of the file, and there is nothing left for the 
next readline() to read... Just omit this.

>while true:
>     in_line = in_file.readline()

Try using:
for in_line in in_file.readlines():

>     if in_line == "":
>         break
>     currentList = string.split(in_line,",")

There are no "," in the sample lines, just spaces.
currentList = in_line.split()  # default separator is space

>     #print out the contents of the current list
>     print currentList

just fine...

>     #make the inline stop reading
>     in_line = in_line[:-1]
????

>in_file.close()


Gabriel Genellina
Softlab SRL




From markus_wankus at hotmail.com  Tue Jan 13 15:22:55 2004
From: markus_wankus at hotmail.com (Markus Wankus)
Date: Tue, 13 Jan 2004 15:22:55 -0500
Subject: Visual Jython idea brainstorming welcome
References: <1db780c8.0401130936.88d1da4@posting.google.com>
Message-ID: <opr1qdkhzn8cxiwf@news.packetworks.net>

On 13 Jan 2004 09:36:57 -0800, Victor <forsale2tor at yahoo.com> wrote:

> Hi all,
>
> I had this idea two minutes ago. I am proprosing an idea to build an
> IDE called "Visual Jython" with Eclipse technology. This IDE is
> targeted towards building enterprise client applications running any
> Java platform mostly non-web based clients.
>
> My background is diversed in UNIX variants, Java and Python. Here are
> something off the top of my head.
>
> 1. Basically from UI perspective, it will be like as name implied
> "Visual Studio" like.
>
> 2. plug in architecture
> This IDE should define or use a componenent architecture to plug &
> play component written in Java confining to a Jython Plug in API. For
> instance, we can develop plug in for ODBC, Oracle, DB2, Informix, MQ,
> SAP etc for enterprise uses.
>
>
> 3. gluing languag--Jython
> maybe we need funding to support Jython for this matter to make it
> commerical quality.
>
>
> 4. .NET integration?
> Should this IDE generate code that can run on top of .NET to attract
> more VB/.Net programmers into this field?
>
>
>
> Welcome comments on features this IDE should have.
>

You should check out this project - perhaps you are headed in the same 
direction?

http://ejython.tigris.org/

 From the website:

Description

The eJython project was formed to accommodate two goals. First to provide 
rich scripting functionality to Java developers using Eclipse. The second 
goal is to build a functioning Jython (Java based Python) development 
environment inside Eclipse. The ultimate vision is to realize the 
following requirements.
Provide a view with a Jython interpreter built into the view.
Integrate Jython as a scripting language for complex operations on 
documents open in the Eclipse Editors.
Provide a development environment for developing Jython based projects 
using Eclipse.
Attach Jython to upcoming refactoring extension points to allow developers 
to easily write their own refactoring tools.


--
Markus


From Pieter.Claerhout at Creo.com  Sun Jan  4 13:00:21 2004
From: Pieter.Claerhout at Creo.com (Pieter Claerhout)
Date: Sun, 4 Jan 2004 19:00:21 +0100 
Subject: Cheetah best for templating?
Message-ID: <490316A24CC5D411ACD700B0D078F7F003915D3E@cseexch01.cse.creoscitex.com>

I personally prefer Preppy from the guys at ReportLab.

I find the syntax a little more pythonic and the module is just a single .py
file. I'm using Preppy as the template engine in my Jython servlets and
found that it performed a lot better than Cheetah under those conditions.

Cheers,


pieter

Creo
pieter claerhout | product support prinergy | tel: +32 2 352 2511 |
pieter.claerhout at creo.com | www.creo.com

IMAGINE CREATE BELIEVE(tm)


-----Original Message-----
From: Wilk [mailto:wilkSPAM at OUTflibuste.net] 
Sent: 04 January 2004 13:38
To: python-list at python.org
Subject: Re: Cheetah best for templating?


"Roger Jack" <rjack at elegancetech.com> writes:

> I have just finished reading Code Generation In Action which uses Ruby for
> code generation. I would like to use Python instead. Is Cheetah the best
> tool to use for templating source code files and then generating code? Is
> there something more mature or better?

My graphist and me found it excellent, fast, clear, simple, stable :
Pythonic !

We found the others engines too verbose, more perlish ;-)

Like python, the best is to try somes engines, you will see quickly wich
one you need. First, like everybody, i did my own engine, but Cheetah
was finaly a better wheel !

I use it to generate html, latex and xml

-- 
Wilk - http://flibuste.net
-- 
http://mail.python.org/mailman/listinfo/python-list



From cognizor at cognizor.com  Fri Jan 16 14:41:16 2004
From: cognizor at cognizor.com (cognizor at cognizor.com)
Date: Fri, 16 Jan 2004 12:41:16 -0700
Subject: plebe comment re [Python-Dev] SF patch 864863: Bisect C
 implementation
Message-ID: <20040116124116.69cef8ca.cognizor@cognizor.com>

As a Python, not a C user, I'd chime in on behalf of 
non-developers especially to say Yes, please keep
the python versions of std library modules.  They 
are much used.

In pro: The python implementations are legible.  
They can be followed step by step in the interpreter, 
with added printout statements, that amazing debug,
to understand What the commands do and what
else they could do or not do.  It's not always
obvious otherwise what data-structures they expect.

The python modules are especially useful because 
they include descriptions of how they came about 
and what the parameters are for the different cases, 
who wrote them and what the problems in use are.  
Even the dates help figure out whether they'll fit 
with other pieces.

Just getting things to work comes way before
speed considerations when you're not so expert 
[yet ;-].

So for developers to be putting them routinely 
through [unit] tests is good, because it'd be terribly
hard to figure them out if they didn't work!

Thanks for suggesting in the python-dev
summary, Brett, that we can add our comments.
And thanks to all the developers who care
and do such a thorough job.

-- 
 ;););) blessed are the geeks -- for they shall inherit the source code :):):) 



From __peter__ at web.de  Sun Jan 11 03:57:32 2004
From: __peter__ at web.de (Peter Otten)
Date: Sun, 11 Jan 2004 09:57:32 +0100
Subject: readling newlines
References: <IXTLb.87546$_P.3280883@news4.tin.it>
Message-ID: <btr2um$bf6$03$1@news.t-online.com>

Alessandro Crugnola *sephiroth* wrote:

> Hi, I'm trying to detect the newlines method of a file opened.
> I'm using the 'U' mode as parameter when opening a file, but for every
> file opened the result is always "\r\n", even if the file has been saved
> with the "\n" newline method. Is there i'm missing?
> 
> I'm on Windows with python 2.3.3

Here's what I get (on Linux):

>>> for nl in ["\n", "\r\n", "\n\r", "\r"]:
...     dst = file("tmp.txt", "wb")
...     dst.write("one%stwo" % nl)
...     dst.close()
...     print repr(file("tmp.txt", "U").read())
...
'one\ntwo'
'one\ntwo'
'one\n\ntwo'
'one\ntwo'
>>>

>From the documentation of file():

If Python is built without universal newline support mode 'U' is the same as
normal text mode. 

So maybe you have a version without universal newline support?

Peter



From fBechmann at web.de  Sat Jan 10 06:25:16 2004
From: fBechmann at web.de (Frank Bechmann)
Date: 10 Jan 2004 03:25:16 -0800
Subject: LC_MONETARY formatting
References: <pan.2004.01.09.22.19.04.935366@cfconsulting.ca>
	<3FFF38DE.1050603@v.loewis.de>
	<pan.2004.01.10.00.01.07.962349@cfconsulting.ca>
Message-ID: <dbc00a99.0401100325.7fc7d8bb@posting.google.com>

this

   http://oss.software.ibm.com/icu/

is - as far as I know - *the* OS catch-all project for
encoding-conversion and localisation tasks. It's written in C++, has a
C wrapper and Java's functionality on these topics is based on ICU. I
don't know whether there's a python wrapper for it, but IIRC the
gnue-project (which is mainly written in Python) uses ICU.

but as stated above often in commercial applications the problem is
not the currency formatting but to provide the complete information of
amount, source currency and target currency throughout the complete
flow of the program.


From francisgavila at yahoo.com  Mon Jan  5 16:33:17 2004
From: francisgavila at yahoo.com (Francis Avila)
Date: Mon, 5 Jan 2004 16:33:17 -0500
Subject: ASCII characters in my hex output
References: <mailman.115.1073335765.12720.python-list@python.org>
Message-ID: <vvjm2kcf69106c@corp.supernews.com>

nuvodido wrote in message ...
>I am using pyserial to work with a device on my serial port.  the 
>output is a mixture of ASCII and hex: 
>
>Ex. '\x10\x00*'
>
>
>I need conver the \x00* nuber in to decimal.  Is there way to 
>convter this value striat forward?

You're not being specific enough.  Here are some things to look at:

Pyserial for your serial port-ing needs.

Struct module for C-structs.  Array module for homogenous binary data.

Have a look also at ctypes and xstruct (both external modules).

chr() and ord() builtins; shift and binary arithmetic operators.

I suspect what you are asking is something like:

struct.unpack('=bh', '\x10\x00*') -> (16, 10752)

But again, how can I know?
-- 
Francis Avila


From michael at foord.net  Fri Jan 30 08:05:25 2004
From: michael at foord.net (Fuzzyman)
Date: 30 Jan 2004 05:05:25 -0800
Subject: Simple Database Package
References: <8089854e.0401280622.4e145267@posting.google.com>
	<MYkSb.4270$Jf2.1522@fe1.columbus.rr.com>
Message-ID: <8089854e.0401300505.5f49d490@posting.google.com>

Jamey Cribbs <jcribbs at twmi.rr.com> wrote in message news:<MYkSb.4270$Jf2.1522 at fe1.columbus.rr.com>...
> Fuzzyman wrote:
> > Anyone able to reccomend a simple module / package I can use...  ?
> > I've never done any database work before and am ken to learn - but
> > most of the ones I've seen seem to rely on a database engine buit into
> > a server.. I need a simple stand alone engine. Of course I could just
> > build the functions I need - but that would be a bit of a waste and
> > not so extendable........
> 
> Have a look at KirbyBase (http://www.netpromi.com/kirbybase.html).  It's 
> written in Python, can be either embedded in your application or used in 
> a multi-user/client server mode, and stores its data as plain-text files 
> that can be opened by any text editor.  I'm probably a little biased 
> because I wrote it, but, if your needs are simple, it might prove useful.
> 
> Jamey



Just as I'd decided to use Metakit as well :-)
I *do* like the idea of a pure python solution (cross platform
distribution in 1 package) and a text datafile..

I'll have a look at it anyway... don't be offended if I decide to use
metakit though - it looks pretty good.

Thanks for your help.

Fuzzy


From lubowiecka at go2.pl  Thu Jan  8 04:03:40 2004
From: lubowiecka at go2.pl (Sylwia)
Date: 8 Jan 2004 01:03:40 -0800
Subject: "Interrupted function call" exception while relogging :(
Message-ID: <f6554b84.0401080103.565e2f93@posting.google.com>

Hi!

I need your help...

I have the following problem. I've implemented the python Windows
Service which behaves like a log supervisor. If the space

used by log files is bigger than a given upper limit, then it starts
to delete log files until the space is less than a given

lower limit. I configured the service to start up automatically on
system boot. The script checks the space used by log files

every 1000 secs. After analyse of the space, it falls asleep
(time.sleep(1000)). Everything works OK, except one thing...

Since the service is not tied to the user ID of the person starting
it, the service should remain open even when that person

who started it logs off. So I made an experiment and relogged. After
that it turned out that the service stopped working. The

Event Viewer returned the error:

"SvcDoRun
    time.sleep(1000) 
 exceptions.IOError: [Errno 4] Interrupted function call
"
I use Window XP OS and Python and Python 2.3.2 

I guess that some asynchronous signal was caught by the process during
the execution of an interruptible function

(time.sleep(1000)). Maybe it happened while pressing Ctrl+Alt+Del
sequence during logging? Maybe I should add some signal

handling?
Unfortunately the Windows signal implementation is limited to 6
signals(???):

SIGABRT Abnormal termination 
SIGFPE Floating-point error 
SIGILL Illegal instruction 
SIGINT CTRL+C signal 
SIGSEGV Illegal storage access 
SIGTERM Termination request 

Please help me...

Best wishes,

Sylwia


From ketulp_baroda at yahoo.com  Mon Jan 12 06:44:56 2004
From: ketulp_baroda at yahoo.com (ketulp_baroda)
Date: Mon, 12 Jan 2004 11:44:56 -0000
Subject: what is best for web development??
Message-ID: <btu1bo+8q6c@eGroups.com>

i am developing an issue tracking system 
the primary requirements are
1)it should be platform independent which i think python will take 
care of
2)it should have customizeable gui .I am thinking of using templates 
for this like Cheetah. Is there any other better solution to Cheetah?
The problem i am facing here is i dont know what to use for 
development of the application. I came across many ways to develop 
web application in python which I already specified like 
i)the cgi module in python
ii)Python Server Pages
iii)Quixote
iv)WebWare
v)Zope etc.
I want to choose such an environment so that i dont have to install 
other softwares to run my application.For eg. I think if I develop 
using zope then the client also has to install zope to run my 
software and i dont want this.







From swalters_usenet at yahoo.com  Sun Jan 18 07:46:37 2004
From: swalters_usenet at yahoo.com (Samuel Walters)
Date: Sun, 18 Jan 2004 12:46:37 GMT
Subject: Python used in Freedom Force
References: <4BDF2B3C-464A-11D8-B48D-000A959CB2EC@netmail.to>
	<mailman.392.1074170206.12720.python-list@python.org>
	<4006911e$0$327$e4fe514c@news.xs4all.nl>
	<b68f71a7.0401180343.579a8568@posting.google.com>
Message-ID: <pan.2004.01.18.12.45.04.858571@yahoo.com>

| Alan James Salmoni said |
> Perhaps all this stuff could be put onto the "Python Success Stories"
> part of the python.org website? It's not public, but if the language
> is clearly being used...

I like this idea.  Each high-profile project for which Python is being
used lends some credibility to the language as being worthy of
system-critical functions.

Elsewhere, in comp.lang.scheme, someone mentioned that he was trying to
hack a CL interpreter into the quake engine.  The idea was that he wanted
to teach his kids to program things they found interesting, so he wanted
to have them create quake-bots.  Sort of a new-school Logo. :-P

Are there any games out there with Python engines that are particularly
hackable?  Especially from a novice point of view?

Sam Walters.

-- 
Never forget the halloween documents.
http://www.opensource.org/halloween/
""" Where will Microsoft try to drag you today?
    Do you really want to go there?"""



From wweston at att.net  Thu Jan 22 09:08:02 2004
From: wweston at att.net (wes weston)
Date: Thu, 22 Jan 2004 14:08:02 GMT
Subject: Side note:  Praise to the contibuters to this group
In-Reply-To: <DTFPb.15072$AA6.9820@fed1read03>
References: <DTFPb.15072$AA6.9820@fed1read03>
Message-ID: <6PQPb.691$6O4.14466@bgtnsc04-news.ops.worldnet.att.net>

Sweet



From andrearo at stud.ntnu.no  Mon Jan 19 05:05:51 2004
From: andrearo at stud.ntnu.no (=?ISO-8859-1?Q?Andreas_R=F8sdal?=)
Date: Mon, 19 Jan 2004 11:05:51 +0100
Subject: parse binary file in python?
In-Reply-To: <bueve3$9qv$01$2@news.t-online.com>
References: <Pine.LNX.4.58.0401182201180.1249@leopard.stud.ntnu.no>
	<bueve3$9qv$01$2@news.t-online.com>
Message-ID: <Pine.LNX.4.58.0401191101480.11544@leopard.stud.ntnu.no>

On Sun, 18 Jan 2004, "Martin v. L?wis" wrote:
> Andreas R?sdal wrote:
> > I want to parse a binary file in python. Does
> > python have some built in methods for doing this easily?
> > Any links to example code would be nice..
>
> Depends on the kind of parsing you want to do. Python
> can naturally represent binary files in string objects,
> e.g.
>
> f = open("binaryfile.bin", "rb") # notice the b for binary mode
> data = f.read()
> f.close()
>
> You can then look at the individual bytes by index.

Thanks. Just wanting to know if I understood your answer correctly;
will the data variable above be an array of binary data,
eg. data[220] == 0, and data[221] == 1 etc?

Andreas R?sdal


From jjl at pobox.com  Fri Jan 23 07:37:55 2004
From: jjl at pobox.com (John J. Lee)
Date: 23 Jan 2004 12:37:55 +0000
Subject: Accessing Microsoft Word from Python
References: <mailman.676.1074841832.12720.python-list@python.org>
	<aqq110901q5i3bl1mcpua35o3271m6nq7l@4ax.com>
Message-ID: <878yjy6dss.fsf@pobox.com>

Rene Pijlman <reply.in.the.newsgroup at my.address.is.invalid> writes:

> Mickel Gr?nroos:
> >Does anybody have any good pointers on where I can find information 
> >about accessing Word-documents (or other Microsoft Office applications) 
> >from Python?
> 
> This book: http://safari.oreilly.com/1565926218 explains how to access
> Excel from Python. It also explains COM-interfacing in general.
[...]

O'Reilly used to have a book on Word's object model by Steven Roman.
Haven't read it, and I don't know if it's still published/up-to-date,
but I know Roman's book on MS Access is good (haven't looked, but I
guess the ref you give above is another book by the same author).


John


From skip at pobox.com  Thu Jan 15 10:58:58 2004
From: skip at pobox.com (Skip Montanaro)
Date: Thu, 15 Jan 2004 09:58:58 -0600
Subject: Why gmp is not in the standard library?
In-Reply-To: <4006b54e$0$560$b45e6eb0@senator-bedfellow.mit.edu>
References: <4f0a9fdb.0401150211.615a7f45@posting.google.com>
	<m3hdyxv1mp.fsf@pc150.maths.bris.ac.uk>
	<4006b54e$0$560$b45e6eb0@senator-bedfellow.mit.edu>
Message-ID: <16390.47298.480563.106963@montanaro.dyndns.org>


    >> Licensing?  IIRC, GMP is GPL.

    Brian> So is bsddb and that is included with python.

Bsddb is the name of Python's module which wraps Sleepycat's Berkeley DB,
commonly abbreviated as bdb.  Bsddb is in Python and maintained by the
current developer (Greg Smith), so I assume any necessary accommodations
were made.  A quick glance as a few of the Python files in the bsddb package
didn't make it look like GPL.

Bdb's license is not GPL:

    http://www.sleepycat.com/download/oslicense.html

Skip



From cy.fbp.eryvtvne at ncbybtrglxn.pbz  Thu Jan 15 03:51:46 2004
From: cy.fbp.eryvtvne at ncbybtrglxn.pbz (JZ)
Date: Thu, 15 Jan 2004 09:51:46 +0100
Subject: best book
References: <mailman.372.1074117050.12720.python-list@python.org>
	<t1kb0011sp7p3804ueoujjjeihsu1tkb2m@4ax.com>
Message-ID: <r3lc00p86dsd3cdebndmdjholop9la0jkq@4ax.com>

On Wed, 14 Jan 2004 23:31:32 GMT, Terry Carroll <carroll at tjc.com>
wrote:

>>What is the best book to start with python ? i am have been working since 1 yr with Perl. 
>
>My favorite to start is O'Reilley's "Learning Python."

Yes. It's the good starting point. And for previous Perl programmer
another good choice is  "Python Essential Reference" by David M.
Beazley. Check also this list: http://www.awaretek.com/book.html and
those reviews:
http://www-106.ibm.com/developerworks/linux/library/l-cp12.html

--
JZ


From skip at pobox.com  Wed Jan 28 10:28:48 2004
From: skip at pobox.com (Skip Montanaro)
Date: Wed, 28 Jan 2004 09:28:48 -0600
Subject: isinstance() bug
In-Reply-To: <20040128132225.GA10842@foof.i3.cz>
References: <20040128132225.GA10842@foof.i3.cz>
Message-ID: <16407.54576.283608.505067@montanaro.dyndns.org>


    Michal>  how is it possible that it IS important how you imported a
    Michal>  class definition for isinstance() to work? it's insane!

You imported the module twice (look at sys.modules) so you have two
different A classes.  I believe isinstance() uses the __class__ attribute
and the class's __bases__ attribute to work its way up the class chain
looking for a match.  Even though they are defined identically, you have two
different A classes.  An instance of one can't also be an instance of the
other.

Skip




From theller at python.net  Fri Jan 16 11:47:54 2004
From: theller at python.net (Thomas Heller)
Date: Fri, 16 Jan 2004 17:47:54 +0100
Subject: Very strange unicode behaviour
References: <uisjbrhre.fsf@inout.no> <y8s7c0ml.fsf@python.net>
	<uad4nrgj0.fsf@inout.no>
Message-ID: <hdyvc01x.fsf@python.net>

Syver Enstad <syver at inout.no> writes:

> Thomas Heller <theller at python.net> writes:
>
>> > Is this behaviour the same on Python 2.3?
>> 
>> No, it behaves correctly as it seems:
>
> That's a relief. See my later post to see why the first report I gave
> was *very* confusing.

It looks like an ignored exception somewhere without calling
PyErr_Clear().

Thomas


From shaleh at speakeasy.net  Fri Jan 30 10:18:54 2004
From: shaleh at speakeasy.net (Sean 'Shaleh' Perry)
Date: Fri, 30 Jan 2004 07:18:54 -0800
Subject: Sort by key, then by content
In-Reply-To: <20040130093639.GA3385@nl.linux.org>
References: <9A8139BC-52F3-11D8-9115-000A959CB2EC@netmail.to>
	<200401292348.57424.shaleh@speakeasy.net>
	<20040130093639.GA3385@nl.linux.org>
Message-ID: <200401300718.54219.shaleh@speakeasy.net>

On Friday 30 January 2004 01:36, Gerrit Holl wrote:
> Sean 'Shaleh' Perry wrote:
> > >>> contents = zip(d.keys(), d.values())
>
> How does this differ from d.items()?
>

it doesn't, I just forgot it existed.




From gerrit at nl.linux.org  Mon Jan 19 17:13:50 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Mon, 19 Jan 2004 23:13:50 +0100
Subject: Getting a process's output
In-Reply-To: <82104858-4ACB-11D8-A692-0003934ACDEC@zdome.net>
References: <82104858-4ACB-11D8-A692-0003934ACDEC@zdome.net>
Message-ID: <20040119221350.GB11631@nl.linux.org>

Dietrich Epp wrote:
> Is there any easy way to get all the output of a process?  Ideally, the 
> function takes parameters like exec(), calls fork(), wait()s for the 
> process to complete, and returns the process's stdout, stderr, and exit 
> status.  By stdout and stderr I don't mean file objects or 
> descriptors... I mean strings containing the entire output.
> 
> I would try to do it myself, but I'm not sure how to interleave the 
> operations.

Try commands.getstatusoutput() or the various popen functions.

yours,
Gerrit.

-- 
272. If any one hire a cart alone, he shall pay forty ka of corn per
day.
          -- 1780 BC, Hammurabi, Code of Law
-- 
PrePEP: Builtin path type
    http://people.nl.linux.org/~gerrit/creaties/path/pep-xxxx.html
Asperger's Syndrome - a personal approach:
	http://people.nl.linux.org/~gerrit/english/



From newsgroups at jhrothjr.com  Tue Jan 20 16:59:00 2004
From: newsgroups at jhrothjr.com (John Roth)
Date: Tue, 20 Jan 2004 16:59:00 -0500
Subject: New to Python: my impression v. Perl/Ruby
References: <mailman.493.1074484056.12720.python-list@python.org>
	<bui91p01uu6@enews2.newsguy.com> <du71xpue3rm.fsf@mozart.cc.tut.fi>
Message-ID: <100r97l2cgdag73@news.supernews.com>


"Ville Vainio"
<ville.spamstermeister.vainio at thisisspamprotectiontut.finland> wrote in
message news:du71xpue3rm.fsf at mozart.cc.tut.fi...
> >>>>> "Phil" == Phil Tomson <ptkwt at aracnet.com> writes:
>
>     Phil> Different strokes for different folks, I guess.  I remember
>     Phil> that one of the first things I saw about Ruby was that even
>     Phil> interger literals were objects that can receive messages and
>     Phil> thinking how wonderful that was.  As you say, you're not
>
> Ints are objects in python too:
>
> >>> a=1
> >>> a.__lshift__(1)
> 2
>
> Though "sending messages" to int literals is a syntax error.
>
>     Phil> 10.times do something end
>
>     Phil> is somehow so clear.  It's almost zenlike.
>
> It's cute and fun to write, but less cute for people who have to read
> lots of such code in short time. I have a soft spot for such style
> also; I kinda like Python's "\n".join(["foo","bar"]), even if most
> seem to consider it a wart for readability reasons.

Tacking an iterator on an integer isn't all that bad from
a readability viewpoint - ***except*** for the .step iterator.
.times, .upto and .downto read very nicely, but .step is
a monstrosity. Conceptually, .step has three parameters,
and separating them that way simply doesn't read right.

It's also not consistent with the .each iterator attached to
range objects in Ruby, which is at least intelligible, and is
consistent with the way iterators are done with all other
objects.

The trouble with <string>.join(<sequence of strings>) in Python
is that it reads backwards, at least to me. The arguement that
.join isn't a natural list method makes sense, but nobody seems
to want to consider that there are other solutions that read
fairly well. Of course, they're also consequences of fairly
generic changes to the language.

John Roth


>
> -- 
> Ville Vainio   http://tinyurl.com/2prnb




From chris.lyon at spritenote.co.uk  Sat Jan 17 13:49:26 2004
From: chris.lyon at spritenote.co.uk (Chris Lyon)
Date: 17 Jan 2004 10:49:26 -0800
Subject: Does anyone else not find the fun in programming...?
References: <d232c5e.0401130823.27fd26ff@posting.google.com>
Message-ID: <d232c5e.0401171049.35eb9d79@posting.google.com>

> (Actually typing this was quite fun, so perhaps)

Well, well ,well, what an interesting response !

I have taken a walk down the canal, I have totally ignored the Gov't
and have gloried in the fabulous Wolverhampton Wanderers win today as
football (association). Apparently we beat some team from the
Manchester area. Who would have thought it!

With regard to the actual pursuit of happiness via programming I can
acknowlege certain aspects of the pleasure to be derived from a neat
solution and python has certainly provided me with real solutions. It
has never run out of power for anything I have asked it. If you have
been following over the past couple of years I have attempted to ask
it some pretty stupid questions (for which I hang my head in shame,
Medusa forgive me!)

My own limitations are what I will obviously tend to concentrate on
and I think I am just too lazy to ever programme with true confidence.

However during the days, now long in the past, when I did right stuff
for fun which as it happened sorted out problems at work, I wish
Python had been my language of choice rather than Basic which I did
actually use. But of course...

A word of caution however I think the word fun is a dangerous one to
employ as I have seen it instill, at the very least, nervousness in
managements as they feel they are getting another crazed take on the
world rather than the carefully studied approach that the feel their
particular problem really requires.
Perhaps work will always be that way.

p.s I wrote my bilge pump measuring website in Python and I did have a
lot of fun with that :)


From __peter__ at web.de  Sat Jan 10 16:56:39 2004
From: __peter__ at web.de (Peter Otten)
Date: Sat, 10 Jan 2004 22:56:39 +0100
Subject: Newbie question on self in classes
References: <btpqcr$m5d$1@news.gatel.net>
Message-ID: <btps7e$6jh$00$1@news.t-online.com>

Klaus Oberpichler wrote:

> Hello Python community,
> 
> my simple question is: When is the self reference to a class valid?
> During playing around with python I got the following error message:
> 
>>>> class Test:
> ...  value = 1000
> ...  self.value = 2
> ...
> Traceback (most recent call last):
>   File "<interactive input>", line 1, in ?
>   File "<interactive input>", line 3, in Test
> NameError: name 'self' is not defined
> 
> When I do it a different way no error occurs:
> 
>>>> class Test:
> ...  value = 1000
> ...  def f(self):
> ...   self.value = 2
> ...
>>>>
> 
> When is the reference to its own class is generated and valid? What is the
> reason bihind that behaviour?

The name "self" is just a convention. Python passes the instance to a
method, i. e. a def ... inside the class as its first parameter:

>>> class Test:
...     def method(self):
...             self.value = 2
...

So you could say that self is accessible inside (normal) methods.
Now let's create an instance:

>>> t = Test()

Calling the method:

>>> t.method()

This is just a shortcut for:

>>> Test.method(t)

with the important difference that the first form will automatically pick
the "right" method when inheritance comes into play.

Now to the value attribute. The way you defined it, it is a class attribute,
something that ist best avoided at this early state of the learning curve.
What you want is rather an instance attribute, i. e. something that may be
different for every instance of the class. These are initialized in the
__init__() method, which is called implicitly when you say Test():

>>> class Test:
...     def __init__(self):
...             self.value = 1000
...     def method(self, newvalue):
...             self.value = newvalue
...
>>> t = Test()
>>> t.value
1000
>>> t.method(1234)
>>> t.value
1234

>>> Test.method(t, 3210)
>>> t.value
3210

Peter





From steve at ferg.org  Thu Jan  8 10:38:51 2004
From: steve at ferg.org (Stephen Ferg)
Date: 8 Jan 2004 07:38:51 -0800
Subject: what is Python's module search path?
Message-ID: <b16e4ef7.0401080738.1da0cdc5@posting.google.com>

I need a little help here.

I'm developing some introductory material on Python for non-programmers.

The first draft includes this statement.  Is this correct?

-----------------------------------------------------------------
When loading modules, Python looks for modules
in the following places in the following order:

 * Python's built-in modules, including modules in the standard library
 * in the /python23/Libs/site-packages directory
 * the directory from which your main module was loaded
 * in directories in PYTHONPATH
 
------------------------------------------------------------------
Thanks in advance!  -- Steve Ferg


From aahz at pythoncraft.com  Thu Jan 22 01:11:53 2004
From: aahz at pythoncraft.com (Aahz)
Date: 22 Jan 2004 01:11:53 -0500
Subject: an example of a singleton design pattern in python?
References: <hc63caapdui.fsf@praxis.lsil.com> <bun622$e8i$1@panix1.panix.com>
	<mailman.625.1074734700.12720.python-list@python.org>
Message-ID: <bunpj9$amu$1@panix2.panix.com>

In article <mailman.625.1074734700.12720.python-list at python.org>,
Jeff Epler  <jepler at unpythonic.net> wrote:
>On Wed, Jan 21, 2004 at 07:38:26PM -0500, Aahz wrote:
>>
>> * Within a single module, use a global class as your singleton object.
>
>This is a little bit inconvenient, because you must either mark all
>methods as staticmethod (and refer to the class by name), or you must
>mark all methods as classmethod.

That's assuming one needs methods, of course; many times, the singleton
is just used for storing attributes.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

A: No.
Q: Is top-posting okay?


From __peter__ at web.de  Mon Jan 19 12:08:14 2004
From: __peter__ at web.de (Peter Otten)
Date: Mon, 19 Jan 2004 18:08:14 +0100
Subject: subclassing "file"
References: <bugvp5$rvd$1@news.rz.uni-karlsruhe.de>
	<buh2aa$qia$03$1@news.t-online.com>
Message-ID: <buh2nt$qvb$03$1@news.t-online.com>

Oops, hit the wrong button. The example goes like so:

>>> class myfile(file):
...     def __init__(self, op, *args):
...             file.__init__(self, *args)
...             self.op = op
...     def write(self, s):
...             file.write(self, self.op(s))
...
>>> f = myfile(lambda s: "-".join(s), "tmp.txt", "w")
>>> f.write("a foolish consciousness")
>>> f.close()
>>> file("tmp.txt").read()
'a- -f-o-o-l-i-s-h- -c-o-n-s-c-i-o-u-s-n-e-s-s'
>>>

Of course I used *args only because I'm to laze to name the actual arguments
one at a time :-)

Peter




From nospam at nowhere.hu  Sun Jan 25 15:22:50 2004
From: nospam at nowhere.hu (Miklós)
Date: Sun, 25 Jan 2004 21:22:50 +0100
Subject: Guardian: open source is a throwback says Jack Schofield
References: <64cff82f.0401251143.328388bd@posting.google.com>
Message-ID: <bv18f2$c51$1@namru.matavnet.hu>

Jack Schofield  is an opinionated jackass who spreads Holloween FUD.
Guardian's journalists are usually better than that.

Best,
   Mikl?s


"malcolm" <malcolmny_1 at lycos.com> wrote in message
news:64cff82f.0401251143.328388bd at posting.google.com...
> Why you can't get something for nothing
> Jack Schofield Jan 22 2004
>
cheaper but more powerful off-the-shelf packages. From that point of
> view, open source is a throwback."
>
> - http://www.guardian.co.uk/online/story/0,3605,1127802,00.html




From irmen at -NOSPAM-REMOVETHIS-xs4all.nl  Wed Jan 14 16:07:15 2004
From: irmen at -NOSPAM-REMOVETHIS-xs4all.nl (Irmen de Jong)
Date: Wed, 14 Jan 2004 22:07:15 +0100
Subject: Quick question.....
In-Reply-To: <379178f1.0401141303.62713fbf@posting.google.com>
References: <379178f1.0401141303.62713fbf@posting.google.com>
Message-ID: <4005af81$0$318$e4fe514c@news.xs4all.nl>

Narsil wrote:
> I have a list, which consists of just numbers.
> 
> Is there a command that will allow me to total up these numbers and get an average?
> 
> Say for example, the list looks thus:
> 
> numberlist = [10, 2, 5, 7, 3, 46, 4, 5, 87, 5]
> 
> How would I get the total, and how would I get the average?

You could have guessed?

 >>> numberlist=[10, 2, 5, 7, 3, 46, 4, 5, 87, 5]
 >>> print sum(numberlist)
174
 >>> print sum(numberlist)/len(numberlist)          # watch out, integer result
17
 >>> print float(sum(numberlist))/len(numberlist)   # force float result
17.4


--Irmen


From donn at u.washington.edu  Thu Jan 15 16:09:34 2004
From: donn at u.washington.edu (Donn Cave)
Date: Thu, 15 Jan 2004 13:09:34 -0800
Subject: baffling os.system behavior - differs from command line
References: <604fc0ca.0401141750.4dc57782@posting.google.com>
Message-ID: <donn-ECBC40.13093415012004@nntp3.u.washington.edu>

In article <604fc0ca.0401141750.4dc57782 at posting.google.com>,
 even at pondie.com (Ben Floyd) wrote:
...
> The command is Slackware's package creation utility, makepkg. It uses
> the
> current working directory as package source and takes a filename as an
> argument to output the newly created package to. Makepkg is
> essentially
> a tarball creator, wrapped in a nice command. Simple stuff. Here is my
> code:
> 
> I have a for loop that reads a file list, like so:
>         pkg_srcdir = '/packages_source'
>         pkg_dir = '/packages_tgzs'
>         ls = os.listdir(pkg_srcdir)
> 
>                 for name in ls:
>                         build_src = pkg_srcdir + '/' + name
>                         new_filename = pkg_dir + '/' + name + '.tgz'
> 
>                         # Valid directory?
>                         if not os.path.isdir(build_src):
>                                 sys.exit("\nInvalid directory \'" + pkg_srcdir + "\'\n")
> 
>                         # Go into the new directory
>                         try:    os.chdir(build_src)
>                         except  os.error, value:
>                                 sys.exit("\nInvalid directory: \'" + build_src + "\': " + value[1])
> 
>                         # I then execute the command on each result, like so:
>                         # new_filename is correctly assembled, which i can verify
>                         # from printing it out on each loop iteration
>                         os.system('/sbin/makepkg --chown n --linkadd y ' + new_filename)

Well, I don't know.  In casual inspection I don't notice
anything obviously wrong, but then for all I know this
isn't the exact code that has the problem anyway.  What
I could suggest is substitute your own shell script for
makepkg, something that prints out its arguments, current
working directory and whatever you think might be interesting.
The object is to find out exactly what you're asking makepkg
to do, since that is evidently a problem.

Actually a Python program might be a little better, because
"print sys.argv" gives you less ambiguous information than
"echo $*", more like "for arg do echo $arg; done" but on
one line.

The two usage points that occur to me are
1. chdir() affects Python module path resolution.  If you
   chdir to a directory with an "os.py", that would be an
   obvious if unlikely problem, but also some installations
   rely on Python's library finding heuristics in a way
   that is kind of fragile.  I may be wrong about that,
   I don't even want to think about wasting time on this
   misguided feature.

2. system() can be replaced with spawnv() for an increase
   in command parameter list reliability.  What if some
   file has spaces?  In spawnv(), you don't care, but in
   system() it's your job to quote it.  This is also a
   security related issue.

   Donn Cave, donn at u.washington.edu


From hove at bccs.no  Wed Jan 21 07:42:53 2004
From: hove at bccs.no (Joakim Hove)
Date: Wed, 21 Jan 2004 13:42:53 +0100
Subject: Checking for duplicate instances of a script...
References: <400e4638$0$19274$626a54ce@news.free.fr>
Message-ID: <4ywu7l5v76.fsf@skjellgran.ii.uib.no>


"Guillaume Dargaud" <NOusenetSPAM at gdargaud.net> writes:

> Hello, python beginner here,
> How can I make sure that a given script is never run more than once at the
> same time in a system ?

This can probably be done in *many* different ways, maybe there is
even an agreed upon on best solution. This is a small suggestion
based on fcntl.flock() (Unix only I am afraid):

#!/usr/bin/python
import struct, fcntl
import sys
lockfile = "/tmp/.lock"

## Open a file-descriptor for the lock file.
lockH = open(lockfile,"w")

## Try to aquire an exclusive lock on the lock file.
try:
    fcntl.flock(lockH , fcntl.LOCK_EX | fcntl.LOCK_NB)
except IOError,e:
    sys.exit("Lockfile %s already locked - an instance is probably already running" % lockfile)


##
## Your code ...
##    


## Release the lock again
fcntl.flock(lockH, fcntl.LOCK_UN)


-- 
  /--------------------------------------------------------------------\
 / Joakim Hove  / hove at bccs.no  /  (55 5) 84076       |                 \
 | Unifob AS, Avdeling for Beregningsvitenskap (BCCS) | Stabburveien 18 |
 | CMU                                                | 5231 Paradis    |
 \ Thorm?hlensgt.55, 5020 Bergen.                     | 55 91 28 18     /
  \--------------------------------------------------------------------/


From nohmad at sub-port.net  Sun Jan 11 02:37:25 2004
From: nohmad at sub-port.net (Gyoung-Yoon Noh)
Date: 10 Jan 2004 23:37:25 -0800
Subject: Problem in directory working
Message-ID: <92ed2954.0401102337.1e705338@posting.google.com>

I've written Unix's find-like function using recursive os.listdir()
call and generator expression. It seems that error happens in
generator expression.
Below codes do not work. walk.next() generates StopIteration.
When I replace 'yield' with 'print', it works fine.

Why this does not work?
I've had successively implemented unix-find using os.path.walk().
But I want to combine recursive call and generator expressions.

Any comments are welcome.


[snip]
import os

def find(path):
    if not os.path.exists(path):
        raise StopIteration
    if os.path.isdir(path):
        for l in os.listdir(path):
            fullpath = os.sep.join((path, l))
            find(fullpath)
    else:
        yield path

if __name__=='__main__':
    #find('/home/myhome'); raise SystemExit()
    walk = find('/home/myhome')
    for i in walk:
        print i.next()


From tjreedy at udel.edu  Thu Jan  8 13:55:24 2004
From: tjreedy at udel.edu (Terry Reedy)
Date: Thu, 8 Jan 2004 13:55:24 -0500
Subject: Descriptor puzzlement
References: <vvqjj92il4o1d0@news.supernews.com>
Message-ID: <NaudnQjKFt8IOmCiRVn-tw@comcast.com>


"John Roth" <newsgroups at jhrothjr.com> wrote in message
news:vvqjj92il4o1d0 at news.supernews.com...
> Using Python 2.2.3, I create this script:
>
> [beginning of script]
>
> class AnObject(object):
>     "This might be a descriptor, but so far it doesn't seem like it"
>     def __init__(self, somedata):
>         self.it = somedata
>     def __get__(self, obj, type=None):
>         print "in get method"
>         return self.it
>     def __set__(self, obj, it):
>         print "in set method"
>         self.somedata = it

Did you mean to set self.it to match the __init__ and __get__ methods?
Or am I missing something about the esoterics of properties?

Terry J. Reedy




From mark at mceahern.com  Sun Jan 18 19:38:54 2004
From: mark at mceahern.com (Mark McEahern)
Date: Sun, 18 Jan 2004 18:38:54 -0600
Subject: Printing variable names
In-Reply-To: <ad052e5c.0401181451.6c25fdf4@posting.google.com>
References: <a6d1df44.0401181122.56f1f091@posting.google.com>
	<mailman.479.1074455535.12720.python-list@python.org>
	<ad052e5c.0401181451.6c25fdf4@posting.google.com>
Message-ID: <1074472733.5354.2.camel@dev.internal>

[Me]
> There's no simple answer to this.  Consider the fact that you can have 
> more than one name bound to any given mutable instance.

[Dan Bishop]
> Why did you specify "mutable"?  The same applies to immutable
> instances.

I didn't think through the immutable issue, that's all.  So, in short,
no good reason.  <wink>

Cheers,

// m




From tim.one at comcast.net  Sun Jan 18 19:01:00 2004
From: tim.one at comcast.net (Tim Peters)
Date: Sun, 18 Jan 2004 19:01:00 -0500
Subject: Simple (?) Regular Expression Question
In-Reply-To: <6747bc9d.0401181545.2b4ffb14@posting.google.com>
Message-ID: <LNBBLJKPBEHFEDALKOLCAEPPIGAB.tim.one@comcast.net>

[Steve Zatz]
> Is '@' a special character in regular expressions?

Nope.

> I am asking because I don't understand the following:
>
> >>> import re
> >>> s = ' @'
> >>> re.sub(r'\b@','*',s)
> ' @'
> >>> s = ' a'
> >>> re.sub(r'\ba','*',s)
> ' *'

\b matches a "word boundary", meaning it has to have a word character on one
side (something that matches \w), and a non-word character on the other
(something that matches \W), regardless of order.  ' @' contains two
non-word characters (' ' and '@'), so \b doesn't match anything in it.  ' a'
contains a non-word character (' ') followed by a word character ('a'), so
\b matches (an empty string) betwen those two characters.




From cookedm+news at physics.mcmaster.ca  Fri Jan  9 15:19:04 2004
From: cookedm+news at physics.mcmaster.ca (David M. Cooke)
Date: Fri, 09 Jan 2004 15:19:04 -0500
Subject: Lua: further investigation and comparisons with Python and Forth
References: <mailman.208.1073620471.12720.python-list@python.org>
Message-ID: <qnkhdz4q3if.fsf@arbutus.physics.mcmaster.ca>

At some point, "John Benson" <jsbenson at bensonsystems.com> wrote:

> In the future, you may be able to buy some hardware, talk to a
> little Forth kernel in ROM somewhere, decide how to load a real machine
> BIOS, and then set it going prior to the actual OS boot.

Time machine strikes again! I bought one of those last year. All
recent Apple machines do this.

-- 
|>|\/|<
/--------------------------------------------------------------------------\
|David M. Cooke
|cookedm(at)physics(dot)mcmaster(dot)ca


From mwilson at the-wire.com  Thu Jan 22 10:16:59 2004
From: mwilson at the-wire.com (Mel Wilson)
Date: Thu, 22 Jan 2004 10:16:59 -0500
Subject: Assignment to slice
References: <mailman.604.1074712550.12720.python-list@python.org>
	<20040121130236.D8E3.JCARLSON@uci.edu>
	<mailman.619.1074727680.12720.python-list@python.org>
	<20040121185145.C648.JCARLSON@uci.edu>
Message-ID: <rl+DAls/KLZU089yn@the-wire.com>

In article <20040121185145.C648.JCARLSON at uci.edu>,
Josiah Carlson <jcarlson at uci.edu> wrote:
>
>All 'different' language features are 'unusual' until people get used to
>them.  While you are currently saying, "I can't believe people don't
>think this is strange", the rest of us got over it, and may even be
>using the feature to get the job done.

   I really do rely on asking Python "What's in positions
100 to 103 of this string?" and have Python reply "Nothing".
It never occurred to me to try to assign to non-existent
slices.. but I'll accept the present behaviour if it means
Python stays simple and consistent.

   The rule for `a=[]; a[4:5]=[1,2,3,4]` seems to result in
concatenating a[:4], then [1,2,3,4], then a[5:].  That is:
nothing, followed by 1, 2, 3, and 4, then more nothing.

>Hell, I think that Perl variables are f-ing weird.  In the dozen
>languages I've learned over the years, Perl is the only one where you
>have to say hey, you this variable I'm accessing now, it is a scalar,
>not a string.  What the hell is that?  On the other hand, Perl users
>have gotten used to it, and don't think it is strange.

   This seems to have emerged from a Perl tendency to
implement values as strings wherever possible.  You're
saying "Use the stringness of this variable, rather than,
say, its intness."  Weak typing, but it's what lets Perl
automatically fill in missing array values with some
assurance that it won't all go kaboom in the next statement.

        Regards.        Mel.


From none at none.com  Tue Jan 13 18:28:20 2004
From: none at none.com (Derek)
Date: Tue, 13 Jan 2004 18:28:20 -0500
Subject: I come not to bury C++, but to praise it...
References: <mailman.337.1074032524.12720.python-list@python.org>
Message-ID: <bu1uul$cam92$1@ID-46268.news.uni-berlin.de>

"John Benson" wrote in message...

> I think that C++ was a great exercise, but software
> engineering has advanced. Why not take advantage of the
> latest packaging of OOP and enjoy the smoother ride? Pick
> Java, or Python or whatever pleases you. I'm happy using
> C for projects that fit it, and Python for more ambitions
> OOP stuff.  C++ was a great way to move OOP forward,
> but now it looks more like a transitional form than a
> best-of-breed. Sic transit gloria mundi, which is Latin for
> "when you're hot, your hot; when you're not, you're not" or
> something like that.

Apples and oranges; there are lots of things C++ does better than
Python (or Java) and vice versa.  There are lots of factors to
consider, not just the "smoother ride" up the learning curve.

You also seem to have a narrow view of C++ as a strictly OO language
when in fact it supports several programming paradigms (write whatever
you want: template metaprograms, modules, procedures, classes, etc.).

And while C++ may seem "traditional" compared to fast-moving
feature-of-the-week-rich languages, stability can be a Good Thing.

That being said, I'm a big fan of Python (and even Java), but I think
writing a eulogy for C++ is a bit premature.




From cappy2112 at yahoo.com  Sun Jan 11 03:41:20 2004
From: cappy2112 at yahoo.com (Tony C)
Date: 11 Jan 2004 00:41:20 -0800
Subject: Running pydoc from the Windows XP command line (dos box)
Message-ID: <8d3e714e.0401110041.12ede45f@posting.google.com>

According to the help for pydoc, it can be run as a script, from the
command line.

"Or, at the shell command line outside of Python:
Run "pydoc <name>" to show documentation on something"

However, when  I run pydoc from the Windows XP command line, it
launches my editor (Codewright) and displays pydoc.py in the editor.

I want to be able to use it to display docstrings in my modules, from
OUTSIDE of the interactive interpreter.

How do I keep my editor from launching when I type pydoc at the
command line ?

thanks


From ben at transversal.com  Wed Jan  7 04:27:42 2004
From: ben at transversal.com (Ben)
Date: Wed, 07 Jan 2004 09:27:42 +0000
Subject: PEP 310 suggestions
Message-ID: <3ffbd106$0$15344$afc38c87@news.easynet.co.uk>

I hope its not too late to make these comments as I know the PEP has been
around for a while!

I've just been reading PEP 310 and have found it very interesting, as the
problem it attepts to solve is one of the few things I find annoying about
languages like python (coming from a C++ background). 

It would have been nice to be about to use __init__ and __del__ pairs, but
having read the discussion I see that this would be effectively
immpossible.

While I was reading the PEP a few ideas popped into my head and I wondered
if something like them had already been considered. They are probably
rubbish, but I thought I would throw them into the mix!

1) If Python had code blocks, something like this would be possible

def open_file(file, code_block):
  try:
        code_block()
  finally:
        file.close()

then,

f = file("foo")
with open_file(f):     #Note only passing one argument
  # do stuff with f

This would only work if the code_block could be executed in the scope in
which it was written, and not in the one in which it was called. 

This seems to be more general than the current PEP, but introduces quite
massive changes into the language. The idea is that:

with func(args):
        suite

goes to

func(args, suite)

2) Exit handler blocks. These are kind to backwards try-finally blocks that
allow the "close" function to be written close to the "open" one. They also
have the advantage that no extra special functions are needed.

e.g

l = lock.aquire()
onexit l.release():
  # do stuff while locked

is eqivalent to

l = lock.aquire()
try:
   # do stuff while locked
finally:
   l.release()

The obvious disadvantage is that it may be non-obvious that the release call
is delayed to the end of the block

Any comments? The main reason I like these methods is that they are both
more explicit than the PEP, and don't require the addition of any more
special functions. However I can see the disadantages as well!


Cheers

Ben
---


From rganesan at myrealbox.com  Sun Jan 11 01:07:38 2004
From: rganesan at myrealbox.com (Ganesan R)
Date: Sun, 11 Jan 2004 11:37:38 +0530
Subject: Help with if statement
References: <d91f466b.0401102201.3709771@posting.google.com>
Message-ID: <oun08v6ms5.fsf@andlx-anamika.cisco.com>

>>>>> "Jikosan" == Jikosan  <jikosan83 at yahoo.com> writes:

> I can't get my "if" statement to work indicated below.  What happens is no
> matter what the value random is, neg gets incremented by 1.


> for x in range(0,N):
>     random = uniform(-1, 1)
>     print random
>     if random < 1.0: <--- Not working
>         neg = neg+1

Since uniform will return numbers in the interval [-1, 1), all instances of
random will be less than 1.0.  May be you meant to say random < 0.0?

Ganesan

-- 
Ganesan R (rganesan at debian dot org) | http://www.debian.org/~rganesan/
1024D/5D8C12EA, fingerprint F361 84F1 8D82 32E7 1832  6798 15E0 02BA 5D8C 12EA


From engsolnom at ipns.com  Tue Jan  6 20:40:47 2004
From: engsolnom at ipns.com (engsolnom at ipns.com)
Date: Tue, 06 Jan 2004 17:40:47 -0800
Subject: Finaly found a simple enough task for python, took the plunge,
	but.....
References: <3FFB5312.1030803@connection.com>
	<btfao2$i19$1@news2.tilbu1.nb.home.nl>
	<3FFB8071.9070107@connection.com>
Message-ID: <afomvvgeti8q3bapj6bumhkmdikgqnf230@4ax.com>

(top posting..sorry)

I tried  Vincent's suggested code and it works just fine with Win2000, Python2.3.
I did change the code to return the path to a selected file, rather than just a directory.
Shows the value of the newsgroups...I was unaware (of course us newbies are unaware of lots of
things) of tkFileDialog...and was about to write a tk interface to do the same thing. Saved a ton of
time, and probably newsgroup bandwidth.
Thanks, Vincent!
Norm

On Tue, 06 Jan 2004 19:43:45 -0800, Sambo <samirw at connection.com> wrote:

>It did get rid of the blank window but it also does not appear on the task bar( 
>or get focus), but I can ALT+TAB to it.
>maybe it is my Vind-Blows 95.
>
>Thanks , Sam.
>
>vincent wehren wrote:
>
>> "Sam" <Sambo at connection.com> schrieb im Newsbeitrag
>> news:3FFB5312.1030803 at connection.com...
>> | Only 2 weeks messing around with it ( thanks to programs like SYNCHRONEX
>> and
>> | BITORRENT ), and already trying to create windows ( the paths are just too
>> long
>> | for me to want to type them ).
>> | After much trial and error I finaly got the following code to open the
>> 'get dir'
>> | dialog , but I am getting another blank window titled 'tk' and "NOT
>> RESPONDING"
>> | When I kill it (end task), I get reiniit/restart (CTRL+F6) in my shell
>> window
>> | What am I doing wrong? Do I need to do anythink to clean up after using
>> the
>> | dialogs?
>> 
>> Take a look at the tkFileDialog module. Or better, use it for convenience.
>> It already provides some "standard" dialogs. You code would then look
>> similar to:
>> #-----------------------
>> import Tkinter
>> import tkFileDialog
>> 
>> def me():
>>     root = Tkinter.Tk()
>>     root.withdraw() # do this to remove the "blank screen" you mention
>>     dirname = tkFileDialog.askdirectory()
>>     return dirname
>> 
>> print me()
>> #------------------------
>> 
>> HTH
>> 
>> Vincent Wehren
>> 
>> 
>> 
>



From peter at engcorp.com  Mon Jan 26 14:51:18 2004
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 26 Jan 2004 14:51:18 -0500
Subject: Guardian: open source is a throwback says Jack Schofield
References: <64cff82f.0401251143.328388bd@posting.google.com>
	<mailman.772.1075066543.12720.python-list@python.org>
	<bv1jkf$g46$1@namru.matavnet.hu>
	<bv1pgj$ctl$3@news.service.uci.edu>
Message-ID: <40156FB6.F71C19B0@engcorp.com>

Josiah Carlson wrote:
> 
> > Either that or Microsoft. ;-)  Or he's plain stupid.
> >
> > Mikl?s
> 
> Never underestimate the power of stupidity (or ignorance, or denial, or...).
> 
> Speaking of which...
> http://www.whitehouse.gov/news/releases/2004/01/20040122-5.html
> 
>   - Josiah

I'm sorry, really, to bring this up, but as a Canadian I might be a little
thick on this point, so help me out: was that site hacked?  Or is this for
real?

-Peter


From CousinStanley at hotmail.com  Sat Jan  3 08:40:17 2004
From: CousinStanley at hotmail.com (Cousin Stanley)
Date: Sat, 3 Jan 2004 06:40:17 -0700
Subject: Graph in wxPython
References: <bt04a4$2e3$1@news.Stanford.EDU>
	<mailman.42.1073113928.12720.python-list@python.org>
Message-ID: <bt6gln$3mevo$1@ID-130333.news.uni-berlin.de>

John ....

  Perhaps I can add another verse to that song I've been writing
  called The GTK/PyGtk/wGlade/Wx/MatPlotLib Blues .... 

  You know a couple of verses already .... :-)

>>>
>>> import matplotlib
>>>
>>> matplotlib.use( 'WX' )
unrecognized backend WX.
Use one of PS, GD, GTK, Template

-- 
Cousin Stanley
Human Being
Phoenix, Arizona



From jcarlson at nospam.uci.edu  Fri Jan 23 00:46:35 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Thu, 22 Jan 2004 21:46:35 -0800
Subject: cgi concurrency approaches?
In-Reply-To: <7x7jzjgso7.fsf@ruckus.brouhaha.com>
References: <7x7jzjgso7.fsf@ruckus.brouhaha.com>
Message-ID: <buqcjm$m72$1@news.service.uci.edu>

Paul Rubin wrote:

> I'm wondering if folks here have favorite lightweight ways of dealing
> with concurrency in cgi's.  Take a simple case:
> 
> You want to write a cgi that implements a simple counter.  The first
> time it's called, it prints "1".  The next time, "2", etc.  The naive
> implementation looks something like:
> 
>    fd = open("counter.num", "rw")
>    n = int(fd.read())
>    fd.seek(0, 0)
>    fd.write("%d"% n+1)
>    print "Content-type: text/html\n\n"
>    print n
> 
> but of course there's the obvious race condition if two people hit the
> cgi at the same time.
> 
> Fancier solutions include running an transactional database in another
> process and connecting to it, setting up a daemon that remembers the
> counter value in memory and serializes access through a socket that
> the cgi opens, using a file-system specific hack like linking to
> counter file to lock it, having a timeout/retry if the counter is
> locked, with a possible hangup if a lock file gets left around by
> accident, etc.  Each is a big pain in the neck.
> 
> Anyone have some simpler approaches?

I'd just run Xitami (www.xitami.org) and connect a LRWP (Long-Running 
Web Process).  I'm not familliar with Apache, so I don't know if 
mod_python is equivalent.

  - Josiah







From nav+posts at bandersnatch.org  Fri Jan 16 08:49:41 2004
From: nav+posts at bandersnatch.org (Nick Vargish)
Date: 16 Jan 2004 08:49:41 -0500
Subject: New candidate for Python mascot
References: <mailman.33.1072767618.8134.python-list@python.org>
	<m3y8s9t09y.fsf@tanelorn.bandersnatch.org>
	<5ukkd1-e53.ln1@beastie.ix.netcom.com>
Message-ID: <m3oet4roju.fsf@tanelorn.bandersnatch.org>

Dennis Lee Bieber <wlfraed at ix.netcom.com> writes:

>         Especially the second... being in the "It will take me home" 
> category... for dinner...

"We used to have three dogs, but then the Python guys changed the
mascot..."

Nick

-- 
#  sigmask  ||  0.2  ||  20030107  ||  public domain  ||  feed this to a python
print reduce(lambda x,y:x+chr(ord(y)-1),' Ojdl!Wbshjti!=obwAcboefstobudi/psh?')


From nhodgson at bigpond.net.au  Sat Jan 10 17:46:03 2004
From: nhodgson at bigpond.net.au (Neil Hodgson)
Date: Sat, 10 Jan 2004 22:46:03 GMT
Subject: Python And Internationalization maybe a pre-pep?
References: <3ffede43$0$563$b45e6eb0@senator-bedfellow.mit.edu>
Message-ID: <Lg%Lb.4871$Wa.931@news-server.bigpond.net.au>

Brian Kelley:

> I made a new python string type and got enough working on the parser to
> accept
>
> string = i"whatever"

   I would not like to see strings gain more interpretation prefix
characters without very strong justification as the combinational growth
makes code interpretation more difficult. The "i" would need to be used in
conjunction with the "u" or "U" Unicode prefix and possibly the "r" or "R"
raw prefix.

   The order of interpretation here is reasonably obvious as the
internationalization would be applied after the treatment as Unicode and
raw. However, when used in conjunction with other proposed prefix characters
such as for variable interpolation, the ordering becomes more questionable.

   Neil




From harry.g.george at boeing.com  Fri Jan  9 05:29:46 2004
From: harry.g.george at boeing.com (Harry George)
Date: Fri, 9 Jan 2004 10:29:46 GMT
Subject: Debugging Python
References: <mailman.215.1073656414.12720.python-list@python.org>
	<3FFEBDBC.2F9DFD03@engcorp.com>
Message-ID: <xqxllohbejp.fsf@cola2.ca.boeing.com>

Peter Hansen <peter at engcorp.com> writes:

> Ashley Lloyd wrote:
> > 
> > What do people generally use to debug their Python programs? I haven't seen
> > anything out there that walks through the code, but perhaps I'm looking in
> > the wrong places?
> 
> When I need to, which is rare, I either use print statements (a very
> solid technology dating from, oh, last century sometime ;-), or the 
> Python debugger module: pdb.  
> 
> Actually, all I ever do with pdb is this:
> 
>    # this is just before the code that I think is failing
>    import pdb
>    pdb.set_trace()
> 
>    # code that I'm about to trace through goes here
> 
> 
> And about the only features of pdb I've had to use are "r", "n", and
> the ability to inspect arbitrary variables.
> 
> I'm not sure about others, but when I design and code using test-driven 
> development (TDD), I tend not to need to debug almost ever.  The need
> to debug is usually when you aren't sure where a typo, or logic error,
> or other mistake has actually occurred.  When using TDD, it's exceedingly
> rare that when a test fails, I don't know exactly where the problem is
> without having to resort to traditional (slow, tedious, annoying) debugging.
> 
> -Peter


Interesting.  A python newbie asked me the same thing yesterday and I
told him almost exactly what you said: If you are doing test-based
(whether or not it is with someojne else and thus Agile), you don't
get into those grim debug sessions that are part of life in C/C++
land.

Actually what I said was something like 

"If you don't make mistakes, you don't need a debugger.  The way to
avoid mistakes is to test everytime you edit a line or two of code.

"If you need to, use my homegrown debug statements (which print the
module and method/function name, the message, and then flush).  If you
really get stuck, there is a debugger, but typically you just need
debuggers to solve memory problems.  Python mistakes tend to be much
higher level, and pretty obvious once you see the data values."

-- 
harry.g.george at boeing.com
6-6M31 Knowledge Management
Phone: (425) 342-5601


From amy-g-art at cox.net  Fri Jan 23 18:07:38 2004
From: amy-g-art at cox.net (Amy G)
Date: Fri, 23 Jan 2004 15:07:38 -0800
Subject: Various strings to dates.
References: <4GfQb.16187$AA6.14368@fed1read03>
	<MFgQb.95539$6y6.1915432@bgtnsc05-news.ops.worldnet.att.net>
	<PRgQb.16209$AA6.9881@fed1read03>
	<K4ydna_ey7rvOIzdRVn-jw@comcast.com>
Message-ID: <WOhQb.16221$AA6.4763@fed1read03>

Some extra info... when I get this

>>> import sys
>>> sys.path
['', '/usr/local/lib/python2.2', '/usr/local/lib/python2.2/plat-freebsd5',
'/usr/local/lib/python2.2/lib-tk', '/usr/local/lib/python2.2/lib-dynload',
'/usr/local/lib/python2.2/site-packages']

Doesn't that mean that the directory is already in the path???

"Michael Spencer" <michael at telcopartners.com> wrote in message
news:K4ydna_ey7rvOIzdRVn-jw at comcast.com...
> "Amy G" <amy-g-art at cox.net> wrote in message
> news:PRgQb.16209$AA6.9881 at fed1read03...
> > No it won't.  Unfortunatly I don't necessarily have a comma delimited
date
> > string.  Thanks for the input though.
> >
> > The following three date strings is another example of the various date
> > formats I will encounter here.
> >
> > Thursday, 22 January 2004 03:15:06
> > Thursday, January 22, 2004, 03:15:06
> > 2004, Thursday, 22 January 03:15:06
> >
> > All of these are essentially the same date... just in various formats.
I
> > would like to parse through them and get a comparable format so that I
can
> > display them in chronological order.
> >
> >
> > "wes weston" <wweston at att.net> wrote in message
> > news:MFgQb.95539$6y6.1915432 at bgtnsc05-news.ops.worldnet.att.net...
> > > Amy,
> > >     I hope there is a better way but, if you go here:
> > >
> > > http://www.python.org/doc/current/lib/datetime-date.html
> > >
> > > The new datetime module may help. This and the time mod
> > > should get you where you want to go.
> > >
> > > list     = strdate.split(", ")
> > > daystr   = list[0]
> > > daynum   = int(list[1])
> > > monthstr = list[2]
> > > year     = int(list[3])
> > > #funct to get a month int is needed
> > >
> > > d = datetime.Date(y,m,d)
> > >
> > > wes
> > >
> > > ---------------------------------------
> > >
> > > Amy G wrote:
> > > > I have seen something about this beofore on this forum, but my
google
> > search
> > > > didn't come up with the answer I am looking for.
> > > >
> > > > I have a list of tuples.  Each tuple is in the following format:
> > > >
> > > > ("data", "moredata", "evenmoredata", "date string")
> > > >
> > > > The date string is my concern.  This is the date stamp from an
email.
> > > > The problem is that I have a whole bunch of variations when it comes
> to
> > the
> > > > format that the date string is in.  For example I could have the
> > following
> > > > two tuples:
> > > >
> > > > ("data", "moredata", "evenmoredata", "Fri, 23 Jan 2004 00:06:15")
> > > > ("data", "moredata", "evenmoredata", "Thursday, 22 January 2004
> > 03:15:06")
> > > >
> > > > I know there is some way to use the date string from each of these
to
> > get a
> > > > date usable by python, but I cannot figure it out.
> > > > I was trying to use time.strptime but have been unsuccesful thus
far.
> > > >
> > > > Any help is appreciated.
> > > >
> > > >
> > >
> >
> >
>
> This was asked and answered earlier today
>
> See: https://moin.conectiva.com.br/DateUtil
>
> >>> from dateutil.parser import parse
> >>> parse("Thursday, 22 January 2004 03:15:06")
> datetime.datetime(2004, 1, 22, 3, 15, 6)
> >>> parse("Thursday, January 22, 2004, 03:15:06")
> datetime.datetime(2004, 1, 22, 3, 15, 6)
> >>> parse("2004, Thursday, 22 January 03:15:06")
> datetime.datetime(2004, 1, 22, 3, 15, 6)
> >>>
>
>
>




From and-google at doxdesk.com  Fri Jan 23 07:06:32 2004
From: and-google at doxdesk.com (Andrew Clover)
Date: 23 Jan 2004 04:06:32 -0800
Subject: cgi.fieldstorage not getting POST data
References: <606892f8.0401221004.68aac4e2@posting.google.com>
Message-ID: <2c60a528.0401230406.42f13efc@posting.google.com>

astoltz at yahoo.com (Al Stoltz) wrote:

> #!d:/python/python.exe

I don't know if this is related to your problem (I haven't tried 2.3 or
ActiveState's kit for CGI on Windows), but what you probably want is:

  #!d:/python/python.exe -u

To ensure that newline characters are not fiddled with. This will certainly
be necessary if you are dealing with file upload POST requests; see if it
also fixes the problem with plain url-encoded POSTs.

-- 
Andrew Clover
mailto:and at doxdesk.com
http://www.doxdesk.com/


From amy-g-art at cox.net  Tue Jan 27 21:28:09 2004
From: amy-g-art at cox.net (Amy G)
Date: Tue, 27 Jan 2004 18:28:09 -0800
Subject: Confused about a list.sort()
Message-ID: <S6FRb.2098$P17.1139@fed1read03>

I have a list of numbers... actully I have two lists, List 1 is a list of
number strings and List2 is one of numbers.

List 1 example:
List1 = [ '20040124123000', '20040124123001', '20040125012456']

List 2 example:
List2 = [ 20040124123000L, 20040124123001L, '20040125012456L]

When I try either:
List1 = List1.sort ... or
List2 = List2.sirt

and then...
print List1... or
print List2

I get None.

Why is this?
How do I remedy this problem?




From carroll at tjc.com  Tue Jan 20 14:56:55 2004
From: carroll at tjc.com (Terry Carroll)
Date: Tue, 20 Jan 2004 19:56:55 GMT
Subject: New to Python: my impression v. Perl/Ruby
References: <mailman.493.1074484056.12720.python-list@python.org><87ad4kxees.fsf@pobox.com>
	<mailman.524.1074550958.12720.python-list@python.org>
	<100pahdc7d98q58@corp.supernews.com>
Message-ID: <8v1r00pf2ubhk4reqcrk5058ufceoe428m@4ax.com>

On Mon, 19 Jan 2004 23:09:06 -0500, "Francis Avila"
<francisgavila at yahoo.com> wrote:

>Some time ago I wrestled with the Ruby-Python claim-counterclaim to "purity"
>in
>http://groups.google.com/groups?hl=en&lr=&ie=UTF-8&oe=UTF-8&threadm=vug18vkm
>jpiice%40corp.supernews.com&rnum=1&prev=/groups%3Fq%3D%2522Francis%2BAvila%2
>522%2Bruby%26hl%3Den%26lr%3D%26ie%3DUTF-8%26oe%3DUTF-8%26selm%3Dvug18vkmjpii
>ce%2540corp.supernews.com%26rnum%3D1
>
>(Whew)

http://tinyurl.com/2exx8




From ptmcg at users.sourceforge.net  Wed Jan 21 18:18:40 2004
From: ptmcg at users.sourceforge.net (Paul McGuire)
Date: Wed, 21 Jan 2004 23:18:40 GMT
Subject: Need help with Python class idioms
References: <f5c5dc88.0401211243.7e81a26b@posting.google.com><200401212051.50411.james@logicalprogression.net><200401212101.33605.james@logicalprogression.net>
	<mailman.611.1074719029.12720.python-list@python.org>
Message-ID: <kNDPb.6494$6o4.181@fe2.texas.rr.com>

"Jonathan Daugherty" <cygnus at cprogrammer.org> wrote in message
news:mailman.611.1074719029.12720.python-list at python.org...
> # P.S. Since you're asking about idiom, it would be more Pythonic to
write:
> #
> #     if self.mandatoryVar1 is None:
> #
> # using the identity test "is" rather than equality test "==", since there
is
> # only one None.
>
> I'd write
>
>   if not self.mandatoryVar1:
>
> but the first method works, too.
>
> -- 
>
>   Jonathan Daugherty
>   http://www.cprogrammer.org
>
>   "It's a book about a Spanish guy called Manual, you should read it."
>                                                             -- Dilbert
>

... what if mandatoryVar1 was set to False?

-- Paul




From reply.in.the.newsgroup at my.address.is.invalid  Sun Jan  4 20:14:35 2004
From: reply.in.the.newsgroup at my.address.is.invalid (Rene Pijlman)
Date: Mon, 05 Jan 2004 02:14:35 +0100
Subject: Need Help Optomizing Code
References: <vvh8oofr00oi35@corp.supernews.com>
Message-ID: <mbehvv8v8mfu36slm5vfl8bq70dk66un5f@4ax.com>

Andrew:
>and was wondering if anyone out there could help me optomize this code.
[...]
>        self.db = MySQLdb.connect("localhost", "", "", "guestbook")
>        self.c = self.db.cursor()
>        self.c.execute("DELETE FROM guests WHERE id LIMIT 1;")
                                            ^^^^^^^^^^^^^^^^
                                           What does that mean?

>        self.results = self.c.fetchall()

In general, it's unwise to reconnect to a database server for every single
data manipulation. Keep the connection open, and perhaps even the cursor.
But I'm not sure if and how this works precisely with MySQL, I prefer
PostgreSQL myself.

Also, you seem to be forgetting the commit and disconnect.

-- 
Ren? Pijlman


From alloydflanagan at comcast.net  Mon Jan 26 14:58:29 2004
From: alloydflanagan at comcast.net (A. Lloyd Flanagan)
Date: 26 Jan 2004 11:58:29 -0800
Subject: I support PEP 326
References: <mailman.654.1074788734.12720.python-list@python.org>
	<10105bn3bsi63c9@news.supernews.com>
Message-ID: <e838aa6e.0401261158.513e0389@posting.google.com>

"John Roth" <newsgroups at jhrothjr.com> wrote in message news:<10105bn3bsi63c9 at news.supernews.com>...

> Just in case anyone can't find the PEP - it's the one that proposes
> specific objects that will always sort highest and lowest.
> 
> I'm mildly in favor; it seems to be useful for some cases, and it
> also seems easy enough to do. Of course, it would make None
> the second smallest object.
> 
> John Roth

+1 on the PEP.  The names Max and Min seem fine to me, but I'm not
married to them.

What would be the consequence of making Min and None compare equal? 
Then the "None as second lowest" issue goes away.  I can't think of an
example where that would cause problems, but there probably are
some...


From premshree_python at yahoo.co.in  Mon Jan 12 12:07:18 2004
From: premshree_python at yahoo.co.in (=?iso-8859-1?q?Premshree=20Pillai?=)
Date: Mon, 12 Jan 2004 17:07:18 +0000 (GMT)
Subject: Using switches with exec?
In-Reply-To: <btue6p$bdf88$1@ID-111250.news.uni-berlin.de>
Message-ID: <20040112170718.38245.qmail@web8310.mail.in.yahoo.com>

 --- "Diez B. Roggisch" <nospam-deets at web.de> wrote: >
> I need to run a Python program dynamically within
> > another program. I am using exec for the purpose.
> Is
> > there a way to pass parameter switches to exec?
> 
> You can pass a globals-dictionary to exec, which can
> hold the switches
> values. 
> 
> Diez
> -- 
> http://mail.python.org/mailman/listinfo/python-list

Could you please elucidate with a sample script.
Suppose I need to pass the switch "-w" to the
dynamically loaded code (using eval()/exec()).
Any help is appreciated.

-Premshree

________________________________________________________________________
Yahoo! India Mobile: Download the latest polyphonic ringtones.
Go to http://in.mobile.yahoo.com



From peter at engcorp.com  Wed Jan 28 09:27:58 2004
From: peter at engcorp.com (Peter Hansen)
Date: Wed, 28 Jan 2004 09:27:58 -0500
Subject: Distributing Python programs
References: <4017abb7$0$9394$ed9e5944@reading.news.pipex.net>
Message-ID: <4017C6EE.E7F1B27@engcorp.com>

NEWS wrote:
> 
> Can I install Python on a networked server and have any user run Python
> programs without having to go through the 9Mb client install?

Yes, we run dozens of machines from a single network installation.  
Depending on what extensions you need to install (e.g. win32all) you may
need to make some small manual adjustments to get it to work, but 
in essence you can just do a "non-admin" local install, then copy the
entire directory tree to the network.

> What are my options for distributing Python programs to my users?

py2exe: http://starship.python.net/crew/theller/py2exe/

the Macmillan Installer: http://www.mcmillan-inc.com/installer_dnld.html

etc...

-Peter


From computer.problemen at skynet.be  Thu Jan  8 17:50:37 2004
From: computer.problemen at skynet.be (broebel)
Date: Thu, 8 Jan 2004 23:50:37 +0100
Subject: python newbie
Message-ID: <3ffddcfd$0$16662$ba620e4c@news.skynet.be>

hey,

I'm a newbie in the programming world.
I just started and already I'm in a whole lot of problems.

first problem is the fact that I started out with a little program who was
part of a course but the problem is when I launch the program. I don't have
the time to see the result because the screen closes immediately.
Can anyone explain what's happening.

thanks in advance

    me,

# Een bedrag gepast betalen met zo min mogelijk euromunten

bedrag = input ( 'Geef bedrag tussen 0 en 500 eurocent: ' )

for munt in 200, 100, 50, 20, 10, 5, 2, 1 :
    aantal = 0

    while bedrag >= munt :
        aantal = aantal + 1
        bedrag = bedrag - munt

    if aantal > 0 :
        print aantal, 'x', munt




From tchur at optushome.com.au  Fri Jan  9 16:44:22 2004
From: tchur at optushome.com.au (Tim Churches)
Date: 10 Jan 2004 08:44:22 +1100
Subject: Python is far from a top performer according to benchmark
	test...
In-Reply-To: <ryELb.238$tK2.228@amstwist00>
References: <ryELb.238$tK2.228@amstwist00>
Message-ID: <1073684662.1185.11.camel@emilio>

On Sat, 2004-01-10 at 08:05, Carl wrote:
> "Nine Language Performance Round-up: Benchmarking Math & File I/O"
> http://www.osnews.com/story.php?news_id=5602
> 
> I think this is an unfair comparison! I wouldn't dream of developing a
> numerical application in Python without using prebuilt numerical libraries
> and data objects such as dictionaries and lists.

Benchmarks like those reported are nearly worthless, but nevertheless,
it would be interesting to re-run the them using Numeric Python and/or
Pyrex. 

I notice that the author of those benchmarks, Christopher W.
Cowell-Shah, has a PhD in philosophy. Perhaps Python's very own
philosophy PhD, David Mertz, might like to repeat the benchmarking
exercise for one of his columns, but including manipulation of more
realistic data structures such as lists, arrays and dictionaries, as
Carl suggests. I'm sure it would be a popular article, and provide a
counterpoint to the good Dr Mertz's previous articles on Psyco.

-- 

Tim C

PGP/GnuPG Key 1024D/EAF993D0 available from keyservers everywhere
or at http://members.optushome.com.au/tchur/pubkey.asc
Key fingerprint = 8C22 BF76 33BA B3B5 1D5B  EB37 7891 46A9 EAF9 93D0


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From robert_dodier at yahoo.com  Sat Jan 31 10:46:00 2004
From: robert_dodier at yahoo.com (Robert Dodier)
Date: 31 Jan 2004 07:46:00 -0800
Subject: Safe to modify globals(), or not?
References: <6714766d.0401291559.45413e0d@posting.google.com>
	<bvcdt1$8t4$1@panix3.panix.com> <bvd6hm$9h1$03$1@news.t-online.com>
	<bve3te$fk9$1@panix2.panix.com> <bve8f3$us$01$1@news.t-online.com>
Message-ID: <6714766d.0401310746.7be60dd3@posting.google.com>

Peter Otten <__peter__ at web.de> wrote:
[...]
> <interp.py>
> import sys
> import __main__
> setattr(sys.modules["__main__"], "name", "value")
> __main__.anotherName = "another value"
> </interp.py>

Thanks a lot, Peter, this is just the right thing. 
I guess modifying globals() is a non-issue, as it turns out.
I appreciate your help.

Robert Dodier


From tr at jotsite.com  Sat Jan 24 10:44:05 2004
From: tr at jotsite.com (Hoang)
Date: Sat, 24 Jan 2004 15:44:05 GMT
Subject: progress bar
References: <59e5b87.0401231329.6e084d6f@posting.google.com>
	<mailman.715.1074893879.12720.python-list@python.org>
Message-ID: <9pwQb.5566$vy6.3518@newssvr29.news.prodigy.com>

>
> Try Venster:
> http://venster.sourceforge.net
>
> IIRC the test_coolbar.py script includes a progress bar.

I wonder what possessed someone to start another GUI framework.  Aren't
there more than enough existing ones?  The reasoning for it wasn't
immediately apparent on the web page.

Hoang Do
http://jotsite.com





From scottdog at nospam.com  Tue Jan 20 18:21:27 2004
From: scottdog at nospam.com (Dog@will.hunt)
Date: Tue, 20 Jan 2004 15:21:27 -0800
Subject: Installing SpamBayes
References: <400c399b_2@newsfeed.slurp.net>
	<up5r00hr648soiun3j6q326ga9n808hf17@4ax.com>
	<400c451a_1@newsfeed.slurp.net>
	<20040120135921.1C3F.JCARLSON@uci.edu>
	<400c5790_1@newsfeed.slurp.net>
	<20040120150005.1C48.JCARLSON@uci.edu>
Message-ID: <400c6146_1@newsfeed.slurp.net>

I think that may be my problem.  I am not sure how to change the path to
where the setup.py file is...

"Josiah Carlson" <jcarlson at uci.edu> wrote in message
news:20040120150005.1C48.JCARLSON at uci.edu...
> > That didnt work either and the file assoc. are correct.
> >
> > > If you are in windows and your associations are correct, try:
> > > setup.py install
>
> Steps for you to help us help you:
> 1. Open up a console.
> 2. Change to the proper path.
> 3. Run (without the single quotes)
>   'python setup.py install'
>  if that doesn't work, try
>   'setup.py install'
> 4. Copy and paste the output in a message here.
>
>  - Josiah
>




From val at vtek.com  Wed Jan 28 15:21:07 2004
From: val at vtek.com (val)
Date: Wed, 28 Jan 2004 15:21:07 -0500
Subject: Webhosting with Python
References: <8089854e.0401280834.6fd4f972@posting.google.com>
	<bv8pch$2lhu$1@bigboote.WPI.EDU>
Message-ID: <bv95mg$p1de8$1@ID-62387.news.uni-berlin.de>

Sorry,
    i didn't find any mention of Python.
    Can you please point me in right direction?
val
val at vtek dot com

"Kevin Ballard" <kevin at sb.org> wrote in message
news:bv8pch$2lhu$1 at bigboote.WPI.EDU...
> On 2004-01-28 11:34:43 -0500, michael at foord.net (Fuzzyman) said:
>
> > I've recently starting using a very cheap web hoster who has python
> > 2.2 installed.... almost free hosting (but not quite).....
> >
> > Thought some of you guys might be interested..........
> >
> > http://www.xennos.com
> >
> > Fuzzyman
>
> How do you plan to make money off of this?




From jepler at unpythonic.net  Tue Jan 20 20:41:29 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Tue, 20 Jan 2004 19:41:29 -0600
Subject: Pyrex without Python (was Re: calling Pyrex results from C)
In-Reply-To: <400DD5DE.90405@prescod.net>
References: <20040121005749.GA27424@unpythonic.net>
	<400DD5DE.90405@prescod.net>
Message-ID: <20040121014129.GB27424@unpythonic.net>

On Tue, Jan 20, 2004 at 05:29:02PM -0800, Paul Prescod wrote:
> What exactly would Pyrex buy you if you can't afford to 
> use its high-level features like memory management, constructors and OO?

Two reasons, both of them tongue in cheek:

1. my {} keys are broken, so it's perfect to not use C and to use an
environment where I can't use dicts either
2. the people programming small machines are all out do to crazy stuff,
and so programming mine in "Python" (pyrex) would be along those lines.

The closest to a real reason would be along the lines of 1, the pleasure
of avoiding the C syntax.  But since I write enough C/C++ at work that
I'll never stop being familiar with it, that isn't too important for me.

Seriously, it's probably not that useful.  But it is something that's
been bubbling around in my skull off and on.

Jeff



From jiba at tuxfamily.org  Thu Jan  8 09:08:35 2004
From: jiba at tuxfamily.org (Jiba)
Date: Thu, 8 Jan 2004 15:08:35 +0100
Subject: unicode keys in dicts
Message-ID: <20040108150835.7242ef01.jiba@tuxfamily.org>

Hi all,

is the following behaviour normal :

>>> d = {"?" : 1}
>>> d["?"]
1
>>> d[u"?"]
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
KeyError: u'\xe9'


it seems that "?" and u"?" are not considered as the same key (in Python
2.3.3). Though they have the same hash code (returned by hash()).

And "e" and u"e" (non accentuated characters) are considered as the same
!

Jiba


From frank at pc-nett.no  Fri Jan  9 17:19:37 2004
From: frank at pc-nett.no (frank)
Date: Fri, 9 Jan 2004 23:19:37 +0100
Subject: wxpython AttributeError!
Message-ID: <btn9dh$93f9m$1@ID-200515.news.uni-berlin.de>

need help with wxpython.
wxpython code is made with boa-constructor

when i run the code i get this error message:

Traceback (most recent call last):
File "wxApp1.py", line 24, in ?
main()
File "wxApp1.py", line 20, in main
application = BoaApp(0)
File "K:\Python23\lib\site-packages\wxPython\wx.py", line 1945, in __init__
_wxStart(self.OnInit)
File "wxApp1.py", line 13, in OnInit
self.main = wxFrame1.create(None)
File "wxFrame1.py", line 12, in create
return wxFrame1(parent)
File "wxFrame1.py", line 220, in __init__
self._init_ctrls(parent)
File "wxFrame1.py", line 157, in _init_ctrls
EVT_RIGHT_DOWN(self.treeCtrl1, self.OnTreectrl1RightDown)
AttributeError: wxFrame1 instance has no attribute 'OnTreectrl1RightDown'
23:06:44: Debug: c:\PROJECTS\wx\src\msw\app.cpp(439):
'UnregisterClass(canvas)' failed with error 0x00000584 (class still has open
windows.).

this is the code have this code:

self.treeCtrl1 = wxTreeCtrl(id=wxID_WXFRAME1TREECTRL1, name='treeCtrl1',
              parent=self.splitterWindow1, pos=wxPoint(2, 2),
size=wxSize(200,
              610), style=wxTR_HAS_BUTTONS, validator=wxDefaultValidator)
        self.treeCtrl1.SetFont(wxFont(10, wxSWISS, wxNORMAL, wxNORMAL,
False,
              'Microsoft Sans Serif'))
        EVT_RIGHT_DOWN(self.treeCtrl1, self.OnTreectrl1RightDown)
        EVT_TREE_SEL_CHANGED(self.treeCtrl1, wxID_WXFRAME1TREECTRL1,
              self.OnTreectrl1TreeSelChanged)

and the event EVT_RIGHT_DOWN code is:

def OnTreectrl1RightDown(self, event):
          dosomething()
          event.Skip()

the "OnTreectrl1RightDown" is in the wxframe class
what to do?
thanx in advance




From ark at acm.org  Thu Jan 15 10:53:25 2004
From: ark at acm.org (Andrew Koenig)
Date: Thu, 15 Jan 2004 15:53:25 GMT
Subject: I come not to bury C++, but to praise it...
References: <mailman.337.1074032524.12720.python-list@python.org>
	<bu1uul$cam92$1@ID-46268.news.uni-berlin.de>
	<cu%Mb.47396$8H.99443@attbi_s03>
	<bu3khe$dbm5v$1@ID-46268.news.uni-berlin.de>
	<100aq779r2h2c9e@corp.supernews.com>
	<bu3vku$den0t$1@ID-46268.news.uni-berlin.de>
	<8765ferltj.fsf@pobox.com>
Message-ID: <VHyNb.18534$VS4.570530@bgtnsc04-news.ops.worldnet.att.net>


> The argument runs like this: If you don't have near-100% test
> coverage, you are missing many bugs that static typechecking will not
> catch.  So don't do that (the fact that it's perfectly feasible to
> have near-100% coverage, when given support from bosses where
> relevant, has been repeatedly demonstrated recently).  OTOH, if you do
> have 100% coverage, the set of bugs that *are* caught by the static
> typechecks, but *not* by the tests is usually very small, in practice.

There is a subtle fallacy in this argument, at least in the context of C++
and Python, namely that there is a significant category of errors that
static type checking (as C++ and some other languages do it) can detect but
can escape even 100% test coverage.

Before you get out your flame-thrower, please hear me out -- I am not saying
that this reasoning applies to all errors, or even a majority of them, but
only to a significant category.  That category consists of programs where
the types of key objects are not known when the program is written, but are
known when the program is compiled.

Here's an example.  Suppose you're writing a library sort function, which
you intend to be able to work with any kind of sequence.  Suppose further
that you test it only with vectors.  Then you might well have 100% test
coverage, but the code might break when you call it with another kind of
sequence, because it relies on some property of vectors that not all
sequences share.

In practice, C++ programmers often solve such problems by using templates,
which defer type checking until the last possible moment during the
compilation process.  In effect, the compiler looks at each call to our
hypothetical sort function, and verifies that the type assumptions that the
sort function makes are valid in the context of that particular call.  The
result is that the compiler can detect type errors that would show up in a
dynamically typed environment only if the function were tested with the
specific types that revealed the error.

The price one pays for this extra checking, of course, is that one cannot
call such a sort function with an argument with a type that is known only at
run time.  But in practice, there are many cases where being able to defer
type checking until the end of compilation is just as useful as being able
to defer it until run time.  I believe that many people who dislike static
type checking are unaware of this distinction.




From h.goebel at crazy-compilers.com  Sat Jan  3 14:15:17 2004
From: h.goebel at crazy-compilers.com (Hartmut Goebel)
Date: Sat, 03 Jan 2004 20:15:17 +0100
Subject: Simple way to get the full path of a running script?
In-Reply-To: <c0f3952d.0312290515.60537b25@posting.google.com>
References: <Pine.LNX.4.58-035.0312271853130.4789@unix50.andrew.cmu.edu>
	<Pine.LNX.4.58-035.0312271901320.4789@unix50.andrew.cmu.edu>
	<mailman.137.1072571144.684.python-list@python.org>
	<slrnbuud5b.22dn.missive@homer.easthighschool.net>
	<c0f3952d.0312290515.60537b25@posting.google.com>
Message-ID: <3ff713bc$0$17557$9b4e6d93@newsread4.arcor-online.net>

Hi,

Wolfgang Lipp schrieb:

> import inspect
> print inspect.getsourcefile( lambda:None )

Nice idea!

Enhancement: when using inspect.getfile() the snippet will work even for 
module without sourcefile, too.

-- 
Regards
Hartmut Goebel

| Hartmut Goebel               | We build the crazy compilers |
| h.goebel at crazy-compilers.com | Compiler Manufacturer        |



From python at hitmedia.com  Wed Jan 28 17:55:03 2004
From: python at hitmedia.com (Python Baby)
Date: Wed, 28 Jan 2004 14:55:03 -0800
Subject: looking for a good freelance teacher (paid) for OOP consulting
Message-ID: <20040128225503.GA71050@mail.hitmedia.com>

I'm learning Python and Object-Oriented Programming from books and
online resources.

But I really need a good teacher or consultant to have conversations
about the OO design of my current projects, and using Python to its
best.

I would probably need 1-2 hours a week of time, and could pay OK,
though not a fortune.

It would have to be someone with both teaching experience (good at
explaining) and real-world programming experience (good at doing.)

Phone calls are fine.  Doesn't need to be in person.

If interested, please reply to this email (python at hitmedia.com) -
keeping the subject header the same, so I don't miss it.

Thanks!




From gerrit at nl.linux.org  Thu Jan 15 09:18:09 2004
From: gerrit at nl.linux.org (Gerrit Holl)
Date: Thu, 15 Jan 2004 15:18:09 +0100
Subject: TUPLE & LIST
In-Reply-To: <%7xNb.55$Uw3.50@newsr2.u-net.net>
References: <%7xNb.55$Uw3.50@newsr2.u-net.net>
Message-ID: <20040115141809.GA4156@nl.linux.org>

Hi Yomanium Yoth Taripo?t II (cool name!),

Yomanium Yoth Taripo?t II wrote:
> 1) what are the differences between list and tuple?
> 2) how to concatenate tuple and list? no method, no op?rator?
> 3) im looking the fucking manual, and cant add value in my tuple, when it
> already created :/
>   how to do it?

This question is answered in the FAQ:
http://www.python.org/doc/faq/general.html#why-are-there-separate-tuple-and-list-data-types

Lists and tuples, while similar in many respects, are generally used in
fundamentally different ways. Tuples can be thought of as being similar
to Pascal records or C structs; they're small collections of related
data which may be of different types which are operated on as a group.
For example, a Cartesian coordinate is appropriately represented as a
tuple of two or three numbers.

Lists, on the other hand, are more like arrays in other languages. They
tend to hold a varying number of objects all of which have the same type
and which are operated on one-by-one. For example, os.listdir('.')
returns a list of strings representing the files in the current
directory. Functions which operate on this output would generally not
break if you added another file or two to the directory.

Tuples are immutable, meaning that once a tuple has been created, you
can't replace any of its elements with a new value. Lists are mutable,
meaning that you can always change a list's elements. Only immutable
elements can be used as dictionary keys, and hence only tuples and not
lists can be used as keys.

yours,
Gerrit.

-- 
198. If he put out the eye of a freed man, or break the bone of a freed
man, he shall pay one gold mina.
          -- 1780 BC, Hammurabi, Code of Law
-- 
PrePEP: Builtin path type
    http://people.nl.linux.org/~gerrit/creaties/path/pep-xxxx.html
Asperger's Syndrome - a personal approach:
	http://people.nl.linux.org/~gerrit/english/



From p at trick.lu  Sat Jan  3 08:44:30 2004
From: p at trick.lu (Patrick Useldinger)
Date: Sat, 03 Jan 2004 14:44:30 +0100
Subject: Text-to-HTML processing program
References: <slrnbvcm32.122.philh@cabalamat.cabalamat.org>
Message-ID: <7ohdvv097e8pq6bmncjtvlluh8hsnaoq4c@4ax.com>

On Sat, 3 Jan 2004 05:51:33 +0000, philh at invalid.email.address (phil
hunt) wrote:

>Does anyone know of a text-to-HTML processing program, ideally
>written in Python because I'll probably be wanting to make small

I like http://txt2tags.sourceforge.net/, used it to design my homepage.
--
http://www.homepages.lu/pu/


From EP at zomething.com  Sun Jan 25 23:47:07 2004
From: EP at zomething.com (EP)
Date: Sun, 25 Jan 2004 20:47:07 -0800
Subject: Unique ID for CD or DVD
In-Reply-To: <69TQb.15674$Le1.6291@newssvr27.news.prodigy.com>
Message-ID: <5.2.0.9.0.20040125203226.00b7ed50@mail.zomething.com>

Hoang  Do, apparently unapprised of the conspiracy wrote:
>Does anyone know of an existing algorithm/module for generating a unique ID
>for a given CD or DVD?  This would be something akin to CDDB where a CD is
>recognized based on its content.  I could be wrong, but I think CDDB is just
>based on file size or disk size and this alone is not unique enough.  If the
>solution is in Python, all the better.

The music industry uses a unique "key" called The International Standard 
Recording Code (ISRC) number for CDs and it is my understanding that 
Gracenote/CDDB was using that key in their database, though I'm not sure if 
that's the current schema.  I'd bet it is though.

Not sure about DVD's.

Eric

"Who'd be thrilled to talk music/programming projects offline"





From colarte at telesat.com.co  Sat Jan 24 09:11:13 2004
From: colarte at telesat.com.co (camilo olarte)
Date: Sat, 24 Jan 2004 09:11:13 -0500
Subject: [Q] Pyython and curses/ncurses/snack/tinter/...
Message-ID: <200401241410.i0OEASax025797@loky.telesat.com.co>

check this links, :

	http://pdcurses.sourceforge.net/

	curses for window:
	http://flangy.com/dev/python/curses/

	http://www.gnuenterprise.org/~jcater/snapshots/nstti/README.txt

Camilo Olarte
	




From timr at probo.com  Sun Jan 11 20:59:58 2004
From: timr at probo.com (Tim Roberts)
Date: Sun, 11 Jan 2004 17:59:58 -0800
Subject: Using .seek(0) to read.
References: <5PHLb.63142$BQ5.4900@fed1read03>
Message-ID: <9pv300pcgguanquore1bfmkq3kf14u9ej4@4ax.com>

"Amy G" <amy-g-art at cox.net> wrote:
>
>I got this respnse on a prior post.  Peter was correct about not needing to
>compare the old contents, and I was able to easily fix my code by taking out
>any read.
>
>However, now I need to open the file in "r+" mode and do a
><filename>.seek(0) on it.  I am opening up the .procmailrc file for each
>user in a database that has a "save_junkmail" == 1 and inserting some lines.
>They need to be inserted in the correct spot and each user has a different
>number of lines in their .procmailrc.  Everything prints out correctly.  I
>now want to write the lines instead of printing to stdout.

You can't easily insert data in the middle of a text file.  What you need
to do is create a NEW file, and copy the data from OLD to NEW, adding your
new lines at the appropriate spot.  Then close both files, and rename them
into place:
   os.remove( '.procmailrc.was' )
   os.rename( '.procmailrc', '.procmailrc.was' )
   os.rename( '.procmailrc.new', '.procmailrc' )
-- 
- Tim Roberts, timr at probo.com
  Providenza & Boekelheide, Inc.


From lubowiecka at go2.pl  Thu Jan  8 04:43:54 2004
From: lubowiecka at go2.pl (Nazgul)
Date: Thu, 8 Jan 2004 10:43:54 +0100
Subject: "Interrupted function call" exception in Python service while
	relogging
Message-ID: <btj8nt$1v2$1@atlantis.news.tpi.pl>

Hi!
Sorry if I posted it twice...
I need your help...
I have the following problem. I've implemented the python Windows Service
which behaves like a log supervisor. If the space
used by log files is bigger than a given upper limit, then it starts to
delete log files until the space is less than a given
lower limit. I configured the service to start up automatically on system
boot. The script checks the space used by log files
every 1000 secs. After analyse of the space, it falls asleep
(time.sleep(1000)). Everything works OK, except one thing...
Since the service is not tied to the user ID of the person starting it, the
service should remain open even when that person
who started it logs off. So I made an experiment and relogged. After that it
turned out that the service stopped working. The
Event Viewer returned the error:
"SvcDoRun
    time.sleep(1000)
exceptions.IOError: [Errno 4] Interrupted function call
"
I use Window XP OS and Python and Python 2.3.2
I guess that some asynchronous signal was caught by the process during the
execution of an interruptible function
(time.sleep(1000)). Maybe it happened while pressing Ctrl+Alt+Del sequence
during logging? Maybe I should add some signal
handling?
Unfortunately the Windows signal implementation is limited to 6 signals(?):
SIGABRT Abnormal termination
SIGFPE Floating-point error
SIGILL Illegal instruction
SIGINT CTRL+C signal
SIGSEGV Illegal storage access
SIGTERM Termination request
Please help me...
Best wishes,
Sylwia




From james at logicalprogression.net  Fri Jan 16 13:23:34 2004
From: james at logicalprogression.net (James Henderson)
Date: Fri, 16 Jan 2004 18:23:34 +0000
Subject: data structures module
In-Reply-To: <92c59a2c.0401152306.1c6a17f5@posting.google.com>
References: <92c59a2c.0401152306.1c6a17f5@posting.google.com>
Message-ID: <200401161823.34095.james@logicalprogression.net>

On Friday 16 January 2004 7:06 am, MetalOne wrote:
> Today, I wanted a priority queue.
> I notice that Python does not have any sorted lists.
> I know that I can call list.sort(), but that seems rather inefficient
> to call every time an element is added.

You've already had several good suggestions.  I'll just add:

http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/87369

In the paper version of the Python Cookbook Tim says he has a special fondness 
for it, so it must be good!

> I am wondering why there is not a module or modules containing many
> common data structures.  Has such a thing been decided against?  Is it
> that just nobody has done it?  Has nobody else suggested the need for
> it?

The python-dev list has been discussing the introduction of a data structures 
package.  Looking at the thread called "collections module" might give you an 
insight to the thought processes involved.

James
-- 
James Henderson, Logical Progression Ltd.
http://www.logicalprogression.net/




From jepler at unpythonic.net  Wed Jan 28 16:09:48 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Wed, 28 Jan 2004 15:09:48 -0600
Subject: executing an external app
In-Reply-To: <Pine.GSO.4.58.0401281558280.26750@denali.ccs.neu.edu>
References: <Pine.GSO.4.58.0401281558280.26750@denali.ccs.neu.edu>
Message-ID: <20040128210948.GZ18498@unpythonic.net>

Try one or more of these:

os.system, os.spawn*, popen2.*, os.fork + os.exec* (where os.fork is
supported, at least), popen5 (third-party module, posix/unix only),
win32??? (not sure of name, included in win32all, for Windows only)

Jeff



From __peter__ at web.de  Sun Jan  4 09:11:05 2004
From: __peter__ at web.de (Peter Otten)
Date: Sun, 04 Jan 2004 15:11:05 +0100
Subject: how to make a code object a function
References: <bt93ds$tuv$00$1@news.t-online.com>
Message-ID: <bt96ll$75c$02$1@news.t-online.com>

Diez B. Roggisch wrote:

> Hi,
> 
> I've got code objects that are created from strings at runtime that look
> like this:
> 
> def p_op1(_, args):
>     _.add_dependency('p_op1')
> 
> As you migth guess, p_op1 is supposed to become an instance method. Now
> how do I make this code object a function-object that can be set into the
> instances __dict__ to make it a callable method?

Too lazy to type self?

>>> import types
>>> class T(object):
...     def add_dependency(self, name):
...             print "adding dependency", name
...
>>> t = T()
>>> def p_op1(_, args):
...     _.add_dependency("p_op1")
...
>>> t.p_op1 = types.MethodType(p_op1, t)
>>> t.p_op1(1)
adding dependency p_op1
>>>

By the way, types.MethodType and new.instancemethod seem to be equivalent.

Peter


From virusalert at chaseonline.chase.com  Tue Jan 27 07:39:53 2004
From: virusalert at chaseonline.chase.com (virusalert at chaseonline.chase.com)
Date: Tue, 27 Jan 2004 07:39:53 -0500
Subject: Virus Alert - ScanMail for Lotus Notes-->hello
Message-ID: <OF74AFAEA2.687D5934-ON85256E28.004591E1@chase.com>

Dear Chase Customer,
Recently, you sent Chase an e-mail through the Chase Online Message Center
that included an attached file. For protection, our e-mail system
automatically scans all incoming e-mail messages using an anti-virus
program. This scan indicated that a virus was present within your
attachment. The attachment was deleted however the remainder of your
message has still been delivered to Chase and will be responded to. Thank
you,
Thank you,
Chase Banker

Date:      1/27/2004 7:39:53
Subject:  hello
Virus:      WORM_MIMAIL.R
File:        message.zip
From:     python-list at python.org
To:          signup_confirm at chaseonline.chase.com;
Action:   Uncleanable, Quarantined;

Scanned by ScanMail for Lotus Notes 2.5
with scanengine 6.150-1001
and patternfile lpt$vpn.743





From miki.tebeka at zoran.com  Thu Jan 15 05:11:11 2004
From: miki.tebeka at zoran.com (Miki Tebeka)
Date: 15 Jan 2004 02:11:11 -0800
Subject: Why gmp is not in the standard library?
Message-ID: <4f0a9fdb.0401150211.615a7f45@posting.google.com>

Hello All,

On a different thread Skip wrote:
> Yes, you're right.  Starting at 2**1000 I found three safe primes quite
> quickly.  Using my version I gave up waiting after seeing one safe prime
> float by.

Which made me think why Python don't use gmp as it's primary math
package - we'll get fast results, a lot of number types and much more.

Can't think of any reason why Python is implementing its own long
numbers...
Can you enlighten me?

Thanks.
Miki


From sross at connectmail.carleton.ca  Sat Jan 31 15:28:59 2004
From: sross at connectmail.carleton.ca (Sean Ross)
Date: Sat, 31 Jan 2004 15:28:59 -0500
Subject: Python vs. Io
References: <711c7390.0401291301.3f95794@posting.google.com>
	<D6wSb.6538$qU3.576425@news20.bellglobal.com>
	<711c7390.0401301726.3e38da27@posting.google.com>
	<KCESb.6856$qU3.625838@news20.bellglobal.com>
	<711c7390.0401311134.26cd0a11@posting.google.com>
Message-ID: <CgUSb.46650$mf4.1787735@news20.bellglobal.com>

"Daniel Ehrenberg" <LittleDanEhren at yahoo.com> wrote in message
news:711c7390.0401311134.26cd0a11 at posting.google.com...
[snip]
> (everything is public and methods
> can be called with just references),

Okay. So, is there no way to have private attributes/operations?
Or, like in Python, is there just a convention? "_slotName"

[snip]
>Also, when initializing variables,
> their scope must be specified (which is the whole reason for the
> difference between := and =), so id := allocated should probably be
> self id := allocated. self, along with a few other variables, is
> implicitly sent to all functions (and do).

Okay. So, if I set 'self id', like so

    self id := allocated

and want to update it later in the same block I can use

    id = "updated self 'id' slot value"

But, if I later use

    id := "set new local 'id' slot value"

in the same block I get a new local variable. Is that how it works?
Or does the first use of a slot determine its assignment scope
for the duration of the block?

    self a := "unchanged"
    a := "changed"
    write("self a is ", self a)   # changed or unchanged?




From mwh at python.net  Thu Jan  8 08:01:08 2004
From: mwh at python.net (Michael Hudson)
Date: Thu, 8 Jan 2004 13:01:08 GMT
Subject: Descriptor puzzlement
References: <vvqjj92il4o1d0@news.supernews.com>
Message-ID: <m34qv6388c.fsf@pc150.maths.bris.ac.uk>

"John Roth" <newsgroups at jhrothjr.com> writes:

[snippety]

> It doesn't look like the descriptor protocol is getting
> invoked at all.
> 
> What's happening here?

Descriptors need to be attached to classes.

Cheers,
mwh

-- 
6. Symmetry is a complexity-reducing concept (co-routines include
   subroutines); seek it everywhere.
  -- Alan Perlis, http://www.cs.yale.edu/homes/perlis-alan/quotes.html


From michael at foord.net  Wed Jan 28 08:57:04 2004
From: michael at foord.net (Fuzzyman)
Date: 28 Jan 2004 05:57:04 -0800
Subject: Cross Platform Browser Launcher
References: <mailman.898.1075281737.12720.python-list@python.org>
Message-ID: <8089854e.0401280557.29e60991@posting.google.com>

Pieter Claerhout <Pieter.Claerhout at Creo.com> wrote in message news:<mailman.898.1075281737.12720.python-list at python.org>...
> Take a look at the webbrowser module...
> http://www.python.org/doc/current/lib/module-webbrowser.html
> 
> Cheers,
> 

Great - looks good.

Thanks

Fuzzy

> 
> pieter
> 
> Creo
> pieter claerhout | product support prinergy | tel: +32 2 352 2511 |
> pieter.claerhout at creo.com | www.creo.com
> 
> IMAGINE CREATE BELIEVE(tm)
> 
> 
> -----Original Message-----
> From: michael at foord.net [mailto:michael at foord.net] 
> Sent: 28 January 2004 10:18
> To: python-list at python.org
> Subject: Cross Platform Browser Launcher
> 
> 
> I've written a simple application in python with an HTML help file.
> 
> I'm looking for a cross platform way of launching the help file.
> 
> On windows I'd use :
> os.system('start help.html')
> 
> Which automatically opens the file with the users browser.
> 
> Is there a cross-platform way of doing the same thing ? 
> I can do a platform test and use different techniques for different
> systems - but I don't know how to achieve the same effect on a Linux
> (Unix ? Mac ?) machine.....
> 
> Any help appreciated.
> 
> Fuzzy
> 
> --
> 
> 
> http://www.Voidspace.org.uk The Place where headspace meets
> cyberspace. Online resource site - covering science, technology,
> computing, cyberpunk, psychology, spirituality, fiction and more.
> 
> --- 
> 
> http://www.voidspace.org.uk/atlantibots/pythonutils.html
> Python functions - home of dateutils, ConfigObj, StandOut, CGI-News
> and more....
> 
> --
> 
> Everyone has talent. What is rare is the courage to follow talent
> to the dark place where it leads. -Erica Jong
> Ambition is a poor excuse for not having sense enough to be lazy.
>         -Milan Kundera


From lbates at swamisoft.com  Wed Jan 28 14:54:07 2004
From: lbates at swamisoft.com (Larry Bates)
Date: Wed, 28 Jan 2004 13:54:07 -0600
Subject: Chart drawing library for Python
References: <6ee58e07.0401280403.3d52a9e0@posting.google.com>
Message-ID: <cfqdnbFMh9LHjoXdRVn-sw@comcast.com>

ReportLab Graphics is nice (www.reportlab.org).

-Larry

"Lothar Scholz" <llothar at web.de> wrote in message
news:6ee58e07.0401280403.3d52a9e0 at posting.google.com...
> Hello,
>
> is there something like "JpGraph" for python ?
> For those who don't know this PHP library: It is a high level
> drawing library that generates gif files with all kind of charts.
>
> Or (maybe better) is there a C library doing this. I think i
> read about something like this a while ago.




From swalters_usenet at yahoo.com  Sun Jan 18 17:03:19 2004
From: swalters_usenet at yahoo.com (Samuel Walters)
Date: Sun, 18 Jan 2004 22:03:19 GMT
Subject: Using python for _large_ projects like IDE
References: <930ba99a.0401180625.5863acd4@posting.google.com>
	<22zOb.2835$Zk3.135@newssvr29.news.prodigy.com>
Message-ID: <pan.2004.01.18.22.01.46.670164@yahoo.com>

| DilbertFan said |

> If you do write this  IDE, please include a compiler warning that catches
> the missing () at the end of a function that doesn't have arguments.  I've
> sunk into a dark world of a diabolically mind-destroying hysteria while
> trying to troubleshoot some scripts, and then realizing that a python
> function was not executing because I was calling it without '()'.  But
> Python doesn't complain, or give you a message or anything,... it simply
> doesn't execute that function!

Try PyChecker.  It should warn you about such things.
http://pychecker.sourceforge.net/

HTH

Sam Walters.

-- 
Never forget the halloween documents.
http://www.opensource.org/halloween/
""" Where will Microsoft try to drag you today?
    Do you really want to go there?"""



From christianjauvin at videotron.ca  Wed Jan 21 11:55:21 2004
From: christianjauvin at videotron.ca (Christian Jauvin)
Date: Wed, 21 Jan 2004 11:55:21 -0500
Subject: newbie: "File Buffered" Text widget
Message-ID: <Y9yPb.14810$U77.1010689@news20.bellglobal.com>

Hello,

I need a "File Buffered" Text widget (in Tkinter), that
is a window over a buffered text file which would behave
as if the entire file was loaded in memory (permitting
the user to browse huge corpora text files).

Before writing one from scratch, I would like to be sure
that there is no such thing available somewhere.

Thanks!


From skip at pobox.com  Fri Jan  2 11:01:48 2004
From: skip at pobox.com (Skip Montanaro)
Date: Fri, 2 Jan 2004 10:01:48 -0600
Subject: optparse bug?
In-Reply-To: <Pine.SOL.4.31.0401021045540.15647-100000@fitzroy.cs.umass.edu>
References: <Pine.SOL.4.31.0401021045540.15647-100000@fitzroy.cs.umass.edu>
Message-ID: <16373.38380.162607.757665@montanaro.dyndns.org>


    Andres> script foo:

    Andres> <def some_function>
    Andres> <define some options with optparse functionality>

    Andres> script bar:

    Andres> from foo import some_function
    Andres> <define options for bar script>

    Andres> When I do ./bar --help I get foo's options!

Perhaps you expect foo to be executed standalone?  If so, wrap the script
init stuff in 

    if __name__ == "__main__":
        <define some options with optparse functionality>

That way you can run it standalone (when you do need optparse) and import it
as a module (when you don't need optparse).

Skip



From dck at gazeta.pl  Mon Jan 26 06:32:17 2004
From: dck at gazeta.pl (DCK)
Date: 26 Jan 2004 03:32:17 -0800
Subject: TELNET instead PING
Message-ID: <5f505344.0401260332.184d4225@posting.google.com>

Hello :)

Into group-archive i found most e-mails, which touches PINGing.
In my work i've used TELNET for testing if host is operational.
Sometimes, for unknown reasons, workstation doesn't respond
for PINGing. But in WinNT network, all hosts has a nbsession
listening on port 139. I always use this script instead PING
command (hope, will be usefull for someone :) ):



"""
TelPing.py
- Simple Python script to probe workstation in WinNT Network

(c) 2004 Michal Kaczor (26.01.2004)
dck at gazeta.pl
"""

import telnetlib
import sys


def tel_ping(tn_host,tn_port):
    try:
        tn = telnetlib.Telnet(tn_host,tn_port)
        print 'Host:',tn_host,' Port:',tn_port,' <-- CONNECTED'
        tn.close()        
    except:
        print 'Host:',tn_host,' Port:',tn_port,' <-- Error: NO CONNECTION'


def main():
    if (len(sys.argv)==3):
       tel_ping(sys.argv[1],sys.argv[2])
    else:
       print 'Usage: telping.py <host> <port>'

if __name__ == "__main__":
   main()


From d.chirila at finsiel.ro  Fri Jan 30 09:16:12 2004
From: d.chirila at finsiel.ro (Dragos Chirila)
Date: Fri, 30 Jan 2004 16:16:12 +0200
Subject: NEWLINE character problem
Message-ID: <011101c3e73b$9da26c20$2f01a8c0@dchirila>

Hi

I have a string and I want to split it by NEWLINE character.

It is knowned that "Microsoft Windows, Apple's Macintosh OS and various
UNIX, all use different characters to mark the ends of lines in text files.
Unix uses the linefeed (ASCII character 10), MacOS uses the carriage return
(ASCII character 13), and Windows uses a two-character sequence of a
carriage return plus a newline". So, PLEASE don't tell me to use 'split' by
'\n' because it won't work.

I know about the Python support, opening files with 'U' flag, for reading in
universal newline mode. But this is not the case. My script receives a
string, can be the content of a file text from Windows or Unix system. I
want to make sure that I can split this string by NEWLINE character.

Any idea will be appreciated.
Thanks a lot.

Dragos





From bignose-hates-spam at and-benfinney-does-too.id.au  Thu Jan 22 05:21:43 2004
From: bignose-hates-spam at and-benfinney-does-too.id.au (Ben Finney)
Date: 22 Jan 2004 21:11:43 +1050
Subject: Side note:  Praise to the contibuters to this group
References: <DTFPb.15072$AA6.9820@fed1read03>
Message-ID: <slrnc0va77.1dr.bignose-hates-spam@rose.localdomain.fake>

On Wed, 21 Jan 2004 17:41:56 -0800, Amy G wrote:
> So, thank you.  Thank you to all who have helped me, and to all who
> have helped others to better understand this awesome programming
> language.

Seconded.

I think that the subject matter itself (the programming language Python)
bears a significant part of the credit.  Its design has at least two
effects that contribute to the helpfulness of comp.lang.python denizens.

One is that the language is so much easier to get things done in, than
many other languages.  Python programmers are less stressful, less
defensive of "tricks", less jealous of arcane knowledge -- because all
those things are not so common in Python.  Things just work, without
tricks, far more often than with other languages.

Another is that it's possible to experiment directly at the Python
prompt to prove a point, or verify the behaviour being described by
someone seeking explanation; and then to cut & paste the result directly
in a reply.  This leads to a much reduced effort to help someone asking
a question, leading to more responses, and better ones.

But the bulk of the credit must go to the contributors' willingness to
help.  Thanks, all.

-- 
 \       "I went to a general store. They wouldn't let me buy anything |
  `\                                  specifically."  -- Steven Wright |
_o__)                                                                  |
Ben Finney <http://bignose.squidly.org/>


From shaleh at speakeasy.net  Fri Jan 30 02:48:57 2004
From: shaleh at speakeasy.net (Sean 'Shaleh' Perry)
Date: Thu, 29 Jan 2004 23:48:57 -0800
Subject: Sort by key, then by content
In-Reply-To: <9A8139BC-52F3-11D8-9115-000A959CB2EC@netmail.to>
References: <9A8139BC-52F3-11D8-9115-000A959CB2EC@netmail.to>
Message-ID: <200401292348.57424.shaleh@speakeasy.net>

On Thursday 29 January 2004 23:12, Wayne Folta wrote:
> As an experiment, I've written a Python script which reads my mailboxes
> and prints a report on how many messages I've gotten from from each
> unique sender. I use a dictionary with a key of the email address and
> each entry is a list with the 0th element being the user's name (if
> known) and the 1st being the count.
>
> At the end, I print the report, sorted by email address. But then I
> want to print it sorted by frequency of message. What would be the most
> efficient, idiomatic, iterative, functional way to do that. After some
> head-twisting (it's way past my bedtime), I finally figured that
> heapq's would help me, but it seems there should be a cool way to turn
> the dict into a list (map) and also turn it inside out at the same
> time...
>
>
> Any suggestions?

How's this?

>>> d = {'shaleh@': ['Sean Perry', 12], 'lesley@': ['Lesley Perry', 34], 
'dean@': ['Dean Perry', 100]}
>>> contents = zip(d.keys(), d.values())
>>> contents.sort()
>>> contents
[('dean@', ['Dean Perry', 100]), ('lesley@', ['Lesley Perry', 34]), 
('shaleh@', ['Sean Perry', 12])]
>>> contents.sort(lambda x,y: cmp(x[1][1], y[1][1]))
>>> contents
[('shaleh@', ['Sean Perry', 12]), ('lesley@', ['Lesley Perry', 34]), ('dean@', 
['Dean Perry', 100])]




From jepler at unpythonic.net  Fri Jan  9 15:15:13 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Fri, 9 Jan 2004 14:15:13 -0600
Subject: Tcl/Tk Support
In-Reply-To: <E1Af0F7-0003lB-L4@mail.python.org>
References: <E1Af0F7-0003lB-L4@mail.python.org>
Message-ID: <20040109201513.GC2810@unpythonic.net>

try installing the RPM called
tkinter-2.2.2-26.i386.rpm

Jeff



From diego.andrade at smartech.com.br  Fri Jan  9 14:32:33 2004
From: diego.andrade at smartech.com.br (Diego Ribeiro de Andrade)
Date: Fri, 9 Jan 2004 17:32:33 -0200
Subject: Tcl/Tk Support
References: <mailman.231.1073668582.12720.python-list@python.org>
	<btms6u$9rr$1@panix2.panix.com>
Message-ID: <003101c3d6e7$547eee60$7900a8c0@smartech.com.br>

Yes... I typed import Tkinter too but the output was the same!

how I do to install support for Tkinter? Can I download the Tkinter.py file
and paste in the include directory of Python2.2?


"Aahz" <aahz at pythoncraft.com> escreveu na mensagem
news:btms6u$9rr$1 at panix2.panix.com...
> In article <mailman.231.1073668582.12720.python-list at python.org>,
> Diego.andrade <diego.andrade at smartech.com.br> wrote:
> >
> >Im not a Python programer, but I need to use Python on some aplications
CVS
> >related. Im trying to install ViewCVS who need Tkinter library. But It
> >doesnt Work. Im using RedHat 9 Default Installation, to test if Tcl/Tk
> >suport for Python is working I Type in the Python console import tkinter
and
> >received the following output:
> >
> >[root at Diego-Linux root]# python
> >Python 2.2.2 (#1, Feb 24 2003, 19:13:11)
> >[GCC 3.2.2 20030222 (Red Hat Linux 3.2.2-4)] on linux2
> >Type "help", "copyright", "credits" or "license" for more information.
> >>>> import tkinter
> >Traceback (most recent call last):
> >File "<stdin>", line 1, in ?
> >ImportError: No module named tkinter
> >>>>
>
> What happens when you type "import Tkinter" (note initial capital)
> --
> Aahz (aahz at pythoncraft.com)           <*>
http://www.pythoncraft.com/
>
> A: No.
> Q: Is top-posting okay?
> --
> http://mail.python.org/mailman/listinfo/python-list
>




From deets_noospaam at web.de  Wed Jan 28 13:25:12 2004
From: deets_noospaam at web.de (Diez B. Roggisch)
Date: Wed, 28 Jan 2004 19:25:12 +0100
Subject: Curious string behavior
References: <mailman.934.1075310668.12720.python-list@python.org>
Message-ID: <bv8uq8$6ub$02$1@news.t-online.com>

> address2 = ' '
> line = 'function, dealer, type, firstname, lastname, vin, blank'
> print 'Address2 Type (first check): ', type(address2)
> function, dealer, type, firstname, lastname, vin, blank =
                    ^^^^^
Here you rebind the name type (which is initially bound to <type 'type'>,
that can be called with an argument to get its type) to the string '  '.
Hence the second

type(address2)

doesn't work.

You can do this on all symbols/names in python, which can cause confusing
errors. 

Diez


From nospam at nowhere.hu  Mon Jan 26 16:46:03 2004
From: nospam at nowhere.hu (Miklós)
Date: Mon, 26 Jan 2004 22:46:03 +0100
Subject: Advice on XML API integration project?
Message-ID: <bv41m1$afp$1@namru.matavnet.hu>

Hi Pythonist software gurus out there,

Seems like I need to build some glue software between an XML based web
service and some third party client software/platform.
My planned man-in-the-middle has to exchange XML messages with a site which
has a well defined but baroquesc XML API, actually a set of XML messages
posted to that site and the response gets parsed.
The XML API however could change sometimes, there's versioning, etc.
I want the other end to have a rock solid constant API, I'm thinking
XML-RPC, so that the client side doesn't need to be changed or rather
that it wouldn't be complicated because of the need to do all that message
processing, API tracking, etc.
So the other aim of this glue layer is to dramatically simplify the client
side. (The client side is not in Python but some obscure language..)

The XML API has examples for all the message exchanges, so I thought this
could be used to track possible changes so that the code
of the man-in-the-middle preferably doesn't need to be changed, only it's
configuration.

Could you suggest software, libraries, contribute ideas, etc?

Thanks for any input in advance,
Mikl?s




From dave at pythonapocrypha.com  Fri Jan 30 11:00:26 2004
From: dave at pythonapocrypha.com (Dave Brueck)
Date: Fri, 30 Jan 2004 09:00:26 -0700
Subject: Simple list question
References: <bvdub7$ksc$1@ucsnew1.ncl.ac.uk>
Message-ID: <01c601c3e74a$2d7c68b0$6401fea9@YODA>

C GIllespie wrote:
> I have a list something like this: ['1','+','2'], I went to go through and
> change the numbers to floats, e.g. [1,'+',2]. What's the best way of doing
> this? The way I done it seems wrong, e.g.
> 
> nod=['1','+','2']
> i=0
> while i<len(nod):
>     if nod[i] !='+' or nod[i] !='-' or nod[i]!='*' or nod[i] != '/' or
> nod[i] != '(' or nod[i] != ')':
>         nod[i] = float(nod[i])
>     i = i + 1

How about:

>>> nod = ['1','+','2']
>>> for i in range(len(nod)):
...   try:
...     nod[i] = float(nod[i])
...   except ValueError: pass
...
>>> nod
[1.0, '+', 2.0]

-Dave



From usenet_spam at janc.invalid  Fri Jan 16 22:48:09 2004
From: usenet_spam at janc.invalid (JanC)
Date: Sat, 17 Jan 2004 03:48:09 GMT
Subject: Searching for UTF8 capable font for REPORTLAB
References: <mailman.429.1074256100.12720.python-list@python.org>
Message-ID: <Xns947330DAFBE24JanC@213.119.4.35>

Andreas Jung <lists at andreas-jung.com> schreef:

> Reportlab has some problems with creating PDFs from UTF8 encoded text. 
> For this reason they are using a truetype font rina.ttf which looks
> *very ugly*. Does anyone know of a suitable free available truetype
> font that works with UTF8? 

AFAIK a "UTF8 capable TrueType font" doesn't exist; but most modern 
TrueType fonts have Unicode character tables?

(From the screenshots in the userguide.pdf Rina doesn't look ugly IMHO, but 
it's clearly not intended for large pieces of body text. :-)

-- 
JanC

"Be strict when sending and tolerant when receiving."
RFC 1958 - Architectural Principles of the Internet - section 3.9


From LittleDanEhren at yahoo.com  Thu Jan 29 16:01:06 2004
From: LittleDanEhren at yahoo.com (Daniel Ehrenberg)
Date: 29 Jan 2004 13:01:06 -0800
Subject: Python vs. Io
Message-ID: <711c7390.0401291301.3f95794@posting.google.com>

Io (www.iolanguage.com) is a new programming language that's purely
object-oriented (but with prototypes), has a powerful concurrency
mechanism via actors, and uses an extremely  flexible syntax because
all code is a modifiable message tree. Like Python, it is dynamically
typed, has a very clean syntax, produces short code, and is
excruciatingly slow (on the same level as eachother). Io has a unique
syntax combining Lisp's idea of functions for flow control with
traditional function syntax and smalltalk-like syntax to get slots of
objects. Io has no keywords and everything, even multiple lines of
code, can be used as an expression. Even as a beginner to Io, I was
able to write something in just 43 lines to let you do something like
this (and more) in Io:

each((key, value) in map(x=1, y=2, z=3),
    write(key, ": ", value, "\n")
)

Neither the each function nor the map function were built in (Io has
other mechanisms for that kind of thing, but they are less efficient).
Can anyone show me how to so much as alias "for" to "each" in Python
or allow block syntax at all without hacking the C source code?

Io doesn't use __methods_with_this_annoying_syntax__ because nothing
is supposed to be for internal use only and there are only about three
functions that would cause a problem if overridden.

For embedding, Io doesn't have to use Py_ALL_CAPS, instead it just
uses IoCamelCase, which looks much better. Interfaces to C are much
more object oriented.

Many users of Io (myself included) have switched over from Python for
these reasons.

I guess there are still the obvious advantages of Python over Io,
including
*large community
*more bindings to stuff
*strict coding conventions
*inflexible so everything is the same
*no need to close blocks
But unless there are other problems, the first two go away soon
(considering that Io was first created just two years ago). The last
three are somewhat trivial and may even be to Io's advantage.

Daniel Ehrenberg


From elainejackson7355 at home.com  Sat Jan 31 00:57:39 2004
From: elainejackson7355 at home.com (Elaine Jackson)
Date: Sat, 31 Jan 2004 05:57:39 GMT
Subject: conditional expression sought
References: <pRbSb.330334$ts4.37644@pd7tw3no>
	<mailman.1000.1075402284.12720.python-list@python.org>
	<P6iSb.334480$ts4.82507@pd7tw3no>
	<ulnl10teov6ceq1q52laduq13d7u9edddd@4ax.com>
Message-ID: <ntHSb.342694$X%5.120898@pd7tw2no>

Thanks. I've got this straightened around in my head now. I just sort-of
'panicked' when I saw a boolean literal where I didn't expect one to be (ie:
returned by the expression with the A's and B's when all the A's are False). I
realized later that that's what I should have expected, and that you could
always just add "...or undefined()" to such an expression, where

def undefined():
    raise "undefined conditional expression"

This is all just part of my newbie efforts to assimilate the language. Anyway,
thanks again for your help.

Peace

"Dave K" <dk123456789 at REMOVEhotmail.com> wrote in message
news:ulnl10teov6ceq1q52laduq13d7u9edddd at 4ax.com...
| On Fri, 30 Jan 2004 01:06:55 GMT in comp.lang.python, "Elaine Jackson"
| <elainejackson7355 at home.com> wrote:
|
| >Sorry to take so long but I wasn't sure what a "unit test" was (the other
guy's
| >post clarified it). Tell me if this isn't what you're looking for:
| >
| >falsies=[0,0.0,[],(),{},'',None]
| >truies=[49,3.14,[1,2,3],(4,5,6),{7:8,9:10},'nonempty']
| >
| >def demo(A,B):
| >    print "If A is ",A
| >    print "and B is ",B
| >    print "then (A[0] and B[0]) or (A[1] and B[1]) or (A[2] and B[2]) = ",
| >    print (A[0] and B[0]) or (A[1] and B[1]) or (A[2] and B[2])
| >
| >A=[]
| >from random import randint
| >for i in range(3):
| >    A.append(bool(randint(0,1)))
| >B=truies[0:3]
| >demo(A,B)
| >
| >A=[False,False,False]
| >B=falsies[0:3]
| >demo(A,B)
| >print "I would have liked this to be B[2] = ",B[2]
| >
| (snip)
|
| Do you mean that the expression should return the last element in B if
| all elements in A are false? If all subexpressions before the last are
| false, the whole conditional reduces to:
|     A[-1] and B[-1]
|
| So simply force (a copy of) A[-1] to always be true. Instead of
| rewriting demo, I'll cheat by modifying the call:
|
| >>> A=[False, False, False]
| >>> B=[0, 0.0, []]
| >>> demo(A[:-1]+[True], B)
| If A is  [False, False, True]
| and B is  [0, 0.0, []]
| then (A[0] and B[0]) or (A[1] and B[1]) or (A[2] and B[2]) =  []
| >>> print A
| [False, False, False]
|
| For complete generality, you should also consider the case where
| len(A) != len(B). Truncate the longer list, or extend the shorter?
| Does it matter which list is shorter? Or forget the whole mess and
| raise an exception? There are lots of reasonable possibilities, but
| they won't all lead to the same result for certain input values.
| You're in charge of this project, you decide :)
|
| Dave




From timr at probo.com  Wed Jan 14 02:31:31 2004
From: timr at probo.com (Tim Roberts)
Date: Tue, 13 Jan 2004 23:31:31 -0800
Subject: building strings with variable input
References: <pduMb.6321$g4.137247@news2.nokia.com>
	<400273B8.E991F41D@alcyone.com>
	<2szMb.6443$k4.143679@news1.nokia.com>
Message-ID: <3rr900dm9s7th7kgq4muj76d5ocs5uep3b@4ax.com>

Olaf Meyer <nomail at nospam.net> wrote:
>
>I just found out another way ;-) Using the locals() has the disadvantage 
>that I cannot use more complex variable parameters (e.g. certain values 
>of a dictionary). The following works well:
>
>cmd = (executable + " -start " + startTime + " -end " + endTime +
>        " -dir " + options.dir)

Yes, that works, but you should bear in mind that it is slower than the %s
option.  The "+" operations are all separate interpreter steps, while the
"%" operation is done in C.

At least, it was that way when I asked this same question several years
ago.  If it has changed, I'm sure someone will point out my error.

Sometimes, it can make sense to write it this way:

  cmd = ' '.join((
         executable, 
         "-start", startTime,
         "-end", endTime,
         "-dir", options.dir
  ))
-- 
- Tim Roberts, timr at probo.com
  Providenza & Boekelheide, Inc.


From paul at prescod.net  Fri Jan 23 01:57:23 2004
From: paul at prescod.net (Paul Prescod)
Date: Thu, 22 Jan 2004 22:57:23 -0800
Subject: I support PEP 326
In-Reply-To: <hH2Qb.91181$6y6.1837343@bgtnsc05-news.ops.worldnet.att.net>
References: <mailman.654.1074788734.12720.python-list@python.org>	<401081A1.E4C34F00@alcyone.com>	<roy-1E6566.21133122012004@reader2.panix.com>
	<hH2Qb.91181$6y6.1837343@bgtnsc05-news.ops.worldnet.att.net>
Message-ID: <4010C5D3.9060702@prescod.net>

Andrew Koenig wrote:

>>I suppose you could special-case min() and max() to return the
>>appropriate singletons if called with no arguments.
>>
>>There's something very nice about that.  There's also something very
>>ugly about it.  I'm having a hard time deciding which is stronger :-)
> 
> 
> I'm afraid it's not right, because calling min() with no arguments should
> return Max and calling max() with no arguments should return Min.
> 
> This behavior is correct because it preserves the intuitive property that if
> s1 and s2 are (possibly empty) sequences, min(min(s1),min(s2)) should be
> equal to min(s1+s2), and similarly for max.  If you like, Max is the
> identity element for min and Min is the identity element for max.

Calling min with no arguments need not be the same as calling it with an 
empty sequence argument. That is not necessarily an argument for making 
the empty function call return something arguably strange...

  Paul Prescod





From CousinStanley at hotmail.com  Thu Jan  1 13:19:53 2004
From: CousinStanley at hotmail.com (Cousin Stanley)
Date: Thu, 1 Jan 2004 11:19:53 -0700
Subject: Where to go from here? newbee
References: <bt0asa02hj8@enews1.newsguy.com>
	<vv83njb7httmed@corp.supernews.com>
	<bt1f2m02ubt@enews1.newsguy.com>
Message-ID: <bt1oa4$2eka4$1@ID-130333.news.uni-berlin.de>

Richard ....

    A good way to get started with Python
    is to use the interpreter in command-line mode
    and experiment with it just by trying different things .... 

    Anything that works using the interpreter interactively
    will also work by coding the commands in a text editor
    and saving as a Python source file with the  .py  extension ....

    To execute a saved program, open a DOS window,
    and enter ....

        python someProg.py 

    You may have to include your python installation directory
    in the Windows  path  environment variable .... 

        set path=%path%;x:\yourPath\PythonXXX

    A sample interactive session follows .... 

    You can copy/paste it into a text editor,
    whack out the  >>>  and  ...  prompt characters,
    save it as a  .py  file, and then execute
    for a test ....

-- 
Cousin Stanley
Human Being
Phoenix, Arizona
    
>>>
>>> # Lines beginning with the pound sign
... # are comments ....
... #
... # Create some named objects
... # and bind these names
... # to their values
...
>>> root2 = 2**0.5
>>> r     = 42.0
>>> x     = r / root2
>>> y     = x
>>> z     = ( x**2 + y**2 )**0.5
>>>
>>>
>>> # Define a function to print objects
...
>>> def fprint( arg ) :
...     print '   ' , arg
...
>>> # Create a list of objects
...
>>> list_objects = [ r , x , y , z ]
>>>
>>> # Print the objects
...
>>> for this_object in list_objects :
...     fprint( this_object )
...
    42.0
    29.6984848098
    29.6984848098
    42.0
>>>
>>>



From tim.one at comcast.net  Mon Jan 19 16:41:35 2004
From: tim.one at comcast.net (Tim Peters)
Date: Mon, 19 Jan 2004 16:41:35 -0500
Subject: secure unpickle?
In-Reply-To: <87zncjabmu.fsf@pobox.com>
Message-ID: <LNBBLJKPBEHFEDALKOLCIEEFIHAB.tim.one@comcast.net>

[John J. Lee, on Gandalf's safe(r) restricted unpickling code,
 which assigns None to an unpickler's .find_global attr]

> Aha.
>
> I see from past messages that this is thought to solve the security
> problems (for this restricted case), at least by Martin v. Loewis, but
> also that Paul Rubin believes a careful audit would be required to
> have confidence in it (whether that's FUD, as Martin accuses, or
> sensible caution, I have no idea...).

Oh, who knows.  Start by defining "security problem" -- I don't know what
exactly people mean by that, although I do know I lose interest long before
they finish demanding impossibilities <0.6 wink>.  For example, I wouldn't
be surprised if some otherwise idle postdoc found a way to trick cPickle
into segfaulting by constructing an enormously large and/or enormously
deeply nested composition of simple scalar types, lists, tuples and dicts.
I don't know whether that's possible, but long experience certainly suggests
that virtually all C programs have problems with "too much" of anything.

>
http://www.google.com/groups?threadm=mailman.1012591743.10841.python-list%40
python.org

In the specific case discussed there of unpickling a string, I agree with
Martin that there's no plausible attack, perhaps apart from creating a
pickle that unpickled to a multi-gigabyte string (will the system malloc()
properly return NULL if it can't satisfy the request?  even if it does, will
cPickle deal with the NULL return correctly?  will cPickle screw up by
failing to account for the possibility of integer overflow when adding the
size of the string header to number of string bytes requested?  etc -- beats
me).  I expect this is because Martin and I are both familiar with the
actual front-end code that parses a string, and Paul isn't.  Familiarity
doesn't *always* breed contempt <wink>.




From yf110 at vtn1.victoria.tc.ca  Sun Jan 25 02:08:29 2004
From: yf110 at vtn1.victoria.tc.ca (Malcolm Dew-Jones)
Date: 24 Jan 2004 23:08:29 -0800
Subject: perl bug File::Basename and Perl's nature
References: <7fe97cc4.0401242131.22acf485@posting.google.com>
Message-ID: <40136b6d@news.victoria.tc.ca>

Xah Lee (xah at xahlee.org) wrote:
: Just bumped into another irresponsibility in perl.

: the crime in question this time is the module File::Basename.

: Reproduction:

: 1. create a directory containing a file of this name: "cdrom.html".
: 2. "use File::Basename;", with the line:
:    ($name,$path,$suffix) = fileparse($File::Find::name, ('.html',
: '.m'));
: 3. Notice that your cdrom.html will be parsed into "cdr" with suffix
: "om.html".

Well, that's what you asked for, isn't it.

: expletive Perl and Perl slinging morons.

: Now, if you peruse the "documentation" of "perldoc File::Basename",
: you'll see that it shouldn't be so. AND, the writting as usuall is
: fantastic incompetent. To illustrate, i quote:

: --begin quote

:  fileparse

:  The fileparse() routine divides a file
:  specification into three parts: a leading path, a
:  file name, and a suffix. The path contains
:  everything up to and including the last directory
:  separator in the input file specification. The
:  remainder of the input file specification is then
:  divided into name and suffix based on the
:  optional patterns you specify in
:  @suffixlist. Each element of this list can be a
:  qr-quoted pattern (or a string which is
:  interpreted as a regular expression), and is
:  matched against the end of name. If this
:  succeeds, the matching portion of name is removed
:  and prepended to suffix. By proper use of
:  @suffixlist, you can remove file types or
:  versions for examination.

: --end quote

Well it sounds to me like it says it will do what it did.

: Note the last sentence: "By proper use of @suffixlist, you can remove
: file types or versions for examination." Now, this is in sync with the
: usual verbiages of unix man pages, of mentioning irrevalent things.

How is it irrelevent to mention the purpose of the parameter?

: Why the fuck do i need to know what is version, or examination what??

If you don't need to know the version then don't ask the routine to parse
it off of the file name.

As for "or examination what", it takes some pretty obscure, poetical
parsing of english to make sense of this, so I will instead merely assume
you lacked the ability to understand what you read.


: Not every morons in this world is using unix with its morinic
: convention of appending things to file names as a versioning system,

Well that's right isn't it.  Some of us morons use other moronic systems,
such as VMS sometimes.  I must admit though, I rather find VMS's
"moronic", automatic, operating system supported _versioning_ of every
file is an extremely nice feature, allowing me (potentially) to examine,
recover, or reuse, any one of the versions of every file I ever touched
(since the last PURGE, anyway).

And you're right, one has no need to know the version number of a file for
any normal operation on VMS any more than a unix programmer normally needs
to know the inode number of a file, but on the other hand, when you do
certain file manipulations then you do need to know it, and since the
easiest way to access it is via the file name then it looks to me that in
that case the version number returned for my _examination_ by the above
mentioned module might be a good way to do that.

(You sure are rude by the way.)


: and not every moron in this world need to "exam" things. 

"exam" is a noun, and therefore this is also sort of true, but only
because it's a bit of a tautology to say that somene doesn't need to do
something nonsensical.


: The unix
: irrevalency, inprecision, driveling are paragoned above.


: Here is a better documentation for the fileparse subroutine.

:  fileparse

:  fileparse divides a file name into 3 parts:
:  directory string, file name, file name
:  suffix. fileparse($filename, @suffixes) returns a
:  array of 3 elements ($name, $dir_path,
:  $suffix). The concocted result of
:  "dir_path$name$suffix" is guaranteed to equal to
:  $filename. The @suffixes is a array of strings,
:  for example ('\.html', '\.txt', '\.png'). These
:  strings are interpreted to be regular
:  expressions, and is matched against the end of
:  $filename.

"concocted"?


: But NOOO, ... morons are too enamored with driveling

well well, what do we find at the end, sure enough, this also is true.


From tdelaney at avaya.com  Wed Jan  7 17:55:22 2004
From: tdelaney at avaya.com (Delaney, Timothy C (Timothy))
Date: Thu, 8 Jan 2004 09:55:22 +1100
Subject: Pre-PEP: Dynamically evaluating default function arguments
Message-ID: <338366A6D2E2CA4C9DAEAE652E12A1DE01063550@au3010avexu1.global.avaya.com>

> From: Gerrit Holl
> 
> Delaney, Timothy C (Timothy) wrote:
> > IMO it's not a waste of time for this PEP to be written. 
> Unfortunately, not many people are willing to formally 
> document something that they would like to see when the 
> guaranteed result is that it will be rejected.
> 
> PEP 313?

PEP 313 is not an (overly) serious proposal.

My point was that Daniel obviously wants this change. However, it would be highly unlikely for Daniel to write up a PEP that contained enough detail for it to be useful for us to point to in the future with the knowledge (not just expectation) that it will be rejected.

OTOH, there's no real motivation for me to write a PEP either, because I'm happy with the status quo.

Tim Delaney



From enrique.palomo at xgs-spain.com  Tue Jan 27 10:37:57 2004
From: enrique.palomo at xgs-spain.com (Enrique)
Date: Tue, 27 Jan 2004 16:37:57 +0100
Subject: python As400
In-Reply-To: <bumjtk$f78$1@nemesis.news.tpi.pl>
Message-ID: <002101c3e4eb$8a44fb90$6c010a0a@epalomo>

Hi all again.
I tried python for as400 and it works!
Now, 2 questions:
1.- for debuging, how  can i see the "print" i code in a script??
Only in python console, doing execfile ("script.py") i can see, but, is
there a more fair mode??

2.- files in as400 are in ebcdic. But i need to work in ascii to sort de
data later. Can i work in as400 with ascii files?

(sorry, but i?m a very newbie, and a very very very newbie in as400)

-----Mensaje original-----
De: python-list-bounces+enrique.palomo=xgs-spain.com at python.org
[mailto:python-list-bounces+enrique.palomo=xgs-spain.com at python.org]En
nombre de Jarek Zgoda
Enviado el: mi?rcoles, 21 de enero de 2004 20:29
Para: python-list at python.org
Asunto: Re: python As400


Enrique <enrique.palomo at xgs-spain.com> pisze:

> i checked before this website, http://www.iseriespython.com/, but found no
> much information in it (docs)

Sorry, I meant "check this site to read documentation for
AS/400-specific modules".

> worse? how much worse? more worse that can be assumed?

I don't know, I never tried to measure it.

> and connect python on windows with db2 in as400??

No chance except ODBC (http://www.egenix.com/) or ADO (i.e. adodbapi on
SourceForge), anyway you will need Client Access installed.

--
Jarek Zgoda
Unregistered Linux User #-1
http://www.zgoda.biz/ JID:zgoda-a-chrome.pl http://zgoda.jogger.pl/
--
http://mail.python.org/mailman/listinfo/python-list



**AVISO DE CONFIDENCIALIDAD**
La informaci?n contenida en este mensaje y archivos es privada y confidencial estando dirigida solamente al destinatario. Si Ud. ha recibido esta informaci?n por error, por favor, proceda a su inmediata destrucci?n. Cualquier opini?n o punto de vista contenido en este mensaje corresponde al remitente y necesariamente no representa la opini?n del GRUPO XEROX.



From bcd at pvv.ntnu.no  Thu Jan 15 06:09:55 2004
From: bcd at pvv.ntnu.no (Bent C Dalager)
Date: Thu, 15 Jan 2004 11:09:55 +0000 (UTC)
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<pan.2004.01.14.01.17.00.970198@fakeemail.com>
	<bu2ana$bmpci$1@ID-207230.news.uni-berlin.de>
	<Xns94711BBF5F7D6JanC@213.119.4.35>
Message-ID: <bu5se3$2l$3@tyfon.itea.ntnu.no>

In article <Xns94711BBF5F7D6JanC at 213.119.4.35>,
JanC  <usenet at janc.cjb.net> wrote:
>
>You think "cross-platform" means "it runs out-of-the-box on all possible 
>platforms that ever existed, now exist, and will ever exist"?

I'm still amused that some subcultures think of cross-platform as
"runs on 98, NT, 2k and XP" :-)

Cheers
	Bent D
-- 
Bent Dalager - bcd at pvv.org - http://www.pvv.org/~bcd
                                    powered by emacs


From vidar at coretrek.com  Tue Jan 20 12:58:24 2004
From: vidar at coretrek.com (Vidar Braut Haarr)
Date: Tue, 20 Jan 2004 18:58:24 +0100
Subject: Python T-shirt
Message-ID: <400D6C40.2070802@coretrek.com>

Greetings!

I was looking for a Python Tshirt the other day, and I couldn't find any 
good ones.. Therefore I made this one:
<http://www.cafeshops.com/vidarbhaarr/>

The source images can be found here:
<http://lanklan.org/mabus/>

The code on the back of it was written by a very cool guy.. I don't 
remember who. Thanks, anyways! :)

Anyways, feel free to shop! I'm not getting any profit from this. I'm 
not a python guy (I made the shirt as a birthday presant to a buddy), so 
don't ask me about the code. I also don't subscribe to this list, so if 
you reply, please include me as To/Cc.

Enjoy

-- 
Vidar Braut Haarr
http://www.coretrek.com
http://www.corelets.com

"Programmers don't die, they
  just GOSUB without RETURN."



From peter at engcorp.com  Mon Jan  5 17:43:15 2004
From: peter at engcorp.com (Peter Hansen)
Date: Mon, 05 Jan 2004 17:43:15 -0500
Subject: indendation question
References: <20031226033210.GA24039@mrna.tn.nic.in>
	<mailman.130.1072540438.684.python-list@python.org>
Message-ID: <3FF9E883.BC8AB864@engcorp.com>

Sean 'Shaleh' Perry wrote:
> 
> On Thursday 25 December 2003 19:32, km wrote:
> > Hi all,
> >
> > What is the standard and recommended way of indendation one should get to
> > use in python programming ? is it a tab or 2 spaces or 4 spaces ? i am
> > confused. kindly enlighten
> >
> > thanks,
> > KM
> 
> Well the "official" standard can be seen in the python files distributed with
> python -- 4 spaces.
> 
> That said, Python will use any whitespace you want as long as you are
> consistent.  3 spaces, a tab, whatever.

Well, *almost* any whitespace. :-)

>>> import string
>>> string.whitespace
'\t\n\x0b\x0c\r '

Of those, only '\t' and ' ' are going to be much help, I think, when trying
to indent.  Linefeed, carriage return, vertical tab, and form feed are
most likely not well supported yet. ;-)

-Peter


From faizan at jaredweb.com  Sat Jan 24 23:38:17 2004
From: faizan at jaredweb.com (Fazer)
Date: 24 Jan 2004 20:38:17 -0800
Subject: Text Animation
Message-ID: <7b454334.0401242038.11404dac@posting.google.com>

Hello,

I was wondering if anyone has done any simple text-based animation?

I mean things such as text-based pre-loaders.  One example would be
when you use the *nix utility called `wget.` You get that fancy "
====> " type of animation as you download a large file.  Or maybe even
a rotating " | " that I have seen before in some installation
programs.

Any ideas how these effects can be achieved?

Thanks a lot!

Faizan


From km at mrna.tn.nic.in  Mon Jan 19 08:47:50 2004
From: km at mrna.tn.nic.in (km)
Date: Mon, 19 Jan 2004 19:17:50 +0530
Subject: Tkinter
Message-ID: <20040119134750.GA30270@mrna.tn.nic.in>

Hi all,

Is there any good online tutorial which is a good intro for Tkinter programming in Python ? 

regards,
KM





From ramen at lackingtalent.com  Fri Jan  9 11:21:43 2004
From: ramen at lackingtalent.com (Dave Benjamin)
Date: Fri, 09 Jan 2004 16:21:43 -0000
Subject: Python and Jython are kinda different
References: <slrnbvsi8v.78r.ramen@lackingtalent.com> <87wu81jjg2.fsf@pobox.com>
Message-ID: <slrnbvtlos.h2e.ramen@lackingtalent.com>

In article <87wu81jjg2.fsf at pobox.com>, John J. Lee wrote:
> Dave Benjamin <ramen at lackingtalent.com> writes:
> [...]
>> Is there anyone here that works on Jython? Do you need help? What kind of
> 
> They certainly need help.

I suppose that was a redundant question. =)

>> help do you need? What's your estimation of the amount of work needed? Is
> 
> Asking on the Jython list seems like a good idea.

Yes. But I think that c.l.p is an appropriate place to bring this issue up
in general, because if CPython and Jython are truly--as they are often
represented in books and tutorials--just two implementations of the Python
language, we all ought to be more concerned with unifying them. I never see
Jython advertised as a limited subset of Python.

>> the work done with PyPy helpful? I'm really curious.
> 
> PyPy is a research effort, so not immediately useful.  It may have big
> payoffs if successful, of course.

Well, my thinking is that, since it's an implementation of Python written in
Python, many of the new features of CPython that don't require syntactical
or fundamental object-model changes could be ported from PyPy to Jython as a
temporary fix, to be eventually recoded in Java.

-- 
.:[ dave benjamin (ramenboy) -:- www.ramenfest.com -:- www.3dex.com ]:.
: d r i n k i n g   l i f e   o u t   o f   t h e   c o n t a i n e r :


From llothar at web.de  Wed Jan 14 09:43:01 2004
From: llothar at web.de (Lothar Scholz)
Date: 14 Jan 2004 06:43:01 -0800
Subject: Myth or Urban Legend? Python => Google [ was: Why learn Python
	??]
References: <40029dad$0$28706$a729d347@news.telepac.pt><btubno$bd8k6$1@ID-46268.news.uni-berlin.de><100655fo84c2211@corp.supernews.com><btv7gf$btv1p$1@ID-46268.news.uni-berlin.de><87d69og2jl.fsf@pobox.com><bu0v9v$c6nr4$1@ID-46268.news.uni-berlin.de>
	<mailman.343.1074047955.12720.python-list@python.org>
	<1009fum3evnc96a@corp.supernews.com>
Message-ID: <6ee58e07.0401140643.2f5a8586@posting.google.com>

"Francis Avila" <francisgavila at yahoo.com> wrote in message news:<1009fum3evnc96a at corp.supernews.com>...
> EP wrote in message ...
> >Is it true that the original Google spider was written in Python?
> 
> I don't know *what* Google uses Python for, but it uses Python.
> 

The old version of the google toolbar showed a special hint when
hovering over the page rank icon. At least the first spider was
written in python - there is nothing like a urban legend about this
fact. And it seems that python was used enthusiastic by the google
team.

I remember an article about google's spider in a pre 1998 issue of
germans 'CT' or 'IX' magazine, can't remember which one.


From nosmapplease at somewhere.com  Sat Jan  3 10:23:39 2004
From: nosmapplease at somewhere.com (Psymaster)
Date: 3 Jan 2004 15:23:39 GMT
Subject: Import problems
Message-ID: <Xns9465B0F3E7B6Bt45fs6vve@130.133.1.4>

I'm working on projects using pygame and I encounter the following 
problem: In (almost) every file of my source I have to "include 
pygame" because every file uses some function from pygame. Is there 
another way to do this? Does it provide overhead to my app?


From jcarlson at nospam.uci.edu  Sat Jan 24 04:12:47 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Sat, 24 Jan 2004 01:12:47 -0800
Subject: efficient matching of elements a list
In-Reply-To: <7xzncd67sj.fsf@ruckus.brouhaha.com>
References: <pkqQb.2735$KU5.1436@nwrddc02.gnilink.net>
	<7xzncd67sj.fsf@ruckus.brouhaha.com>
Message-ID: <butd2d$3cc$1@news.service.uci.edu>

>>Suppose I have a lists of tuples
>>A_LIST=[(1,6,7),(7,4,2),(7,9,2),(1,5,5),(1,1,1)]
>>and an int
>>i=1
>>What is the fastest way in python to get out all the tuples from the
>>list whose first element  is equal to i?
> 
> 
> t = [x for x in A_LIST if x[0] == i]

Before list comprehensions, we had to do it all with filter...
t = filter(lambda x:x[0]==i, A_LIST)

List comprehension seem to be around 33% faster.  Long live list 
comprehensions.

  - Josiah


From Mike at DeleteThis.Geary.com  Tue Jan 20 23:10:20 2004
From: Mike at DeleteThis.Geary.com (Michael Geary)
Date: Tue, 20 Jan 2004 20:10:20 -0800
Subject: Help, *.CHM, etc
References: <90f2d9db.0401201803.6f2adbf8@posting.google.com>
	<20040120181009.060C.JCARLSON@uci.edu>
	<20040120182610.060F.JCARLSON@uci.edu>
Message-ID: <100rutd6kge1g9f@corp.supernews.com>

Josiah Carlson wrote:
> > Personally, I would suggest:
> > os.startfile("c:\\path\\help.chm")
> >
> > It is documented to do exactly what you want it to do,
> > open up the help file with the microsoft help file viewer.
>
> That is, if .chm files are associated with the microsoft
> help file viewer.
>
> Technically os.system("c:\\path\\help.chm") and
> os.system("start c:\\path\\help.chm") also work, though
> are less intuitive.

No, os.system is the wrong way to do it. That function launches a new
command shell, which in turn runs the program you want. Because of that, if
you're not already running in a console window, it will open a new console
window.

You had it right with os.startfile. That calls the ShellExecute function in
Windows, which is the way you would do it in a native Windows application
written in C.

-Mike




From http  Sun Jan  4 10:40:04 2004
From: http (Paul Rubin)
Date: 04 Jan 2004 07:40:04 -0800
Subject: Sending e-mail with python 1.5.2
References: <fM6PlaqxCD+$EwGQ@at-andros.demon.co.uk>
Message-ID: <7xisjrsox7.fsf@ruckus.brouhaha.com>

I thought 1.5.2 had the smtp package.  If not, how about just using
popen to send the mail through /bin/mail.


From fumanchu at amor.org  Fri Jan 16 10:46:09 2004
From: fumanchu at amor.org (Robert Brewer)
Date: Fri, 16 Jan 2004 07:46:09 -0800
Subject: Bug or feature?
Message-ID: <DE1CF2B4FEC4A342BF62B6B2B334601E561C2B@opus.amorhq.net>

Alexey wrote:
> Does anybody agree that this is a python problem and not a programmer 
> problem?

I don't agree. The programmer has a problem stuffing too much activity
into a single expression. Why return a value from a method (your 'delta'
arg) when you just sent that value to the method? But I'll give further
advice anyway... :)

> So I proposing to make a change into python and reverse the order of 
> calculations.
> Just for sure:
> === Order used now ===
> ## a+=a.Sub(b)
> 1. evaluate value of 'a'
> 2. evaluate value of 'a.Sub(b)'
> 3. evaluate the sum
> 4. store the result into 'a'
> === Proposed order ===
> ## a+=a.Sub(b)
> 1. evaluate value of 'a.Sub(b)'
> 2. evaluate value of 'a'
> 3. evaluate the sum
> 4. store the result into 'a'

You'll have to be more rigorous than that in your description. Given
this single instance, you might be proposing:

1) Evaluate right-to-left instead of left-to-right?
2) Evaluate a.method before a.attribute?
3) Evaluate all calls before all LOAD_FAST?
4) Change the order only for +=? So a = a + a.Sub(b) would be unchanged,
or not?

What happens if a programmer writes:

## a = a + a.Sub(b)
## a = a + a.Sub(b) + a
## a += a.Sub(b) + a + a.Mult(b)?

and on and on.


Robert Brewer
MIS
Amor Ministries
fumanchu at amor.org



From newsgroups at jhrothjr.com  Thu Jan 15 22:09:48 2004
From: newsgroups at jhrothjr.com (John Roth)
Date: Thu, 15 Jan 2004 22:09:48 -0500
Subject: Redefining __call__ in an instance
References: <73b00f0c.0401151529.676347b6@posting.google.com>
Message-ID: <100elhmkfph1te7@news.supernews.com>


"Robert Ferrell" <ferrell at diablotech.com> wrote in message
news:73b00f0c.0401151529.676347b6 at posting.google.com...
> I have a question about assigning __call__ to an instance to make that
> instance callable.  I know there has been quite a bit of discussion
> about this, and I've read all I can find, but I'm still confused.
>
> I'd like to have a factory class that takes a string argument and returns
> the appropriate factory method based on that string.  I'd like the
> instances to be callable.  Like this:
>
> fact = Factory('SomeThing')
> aSomeThing = fact(some args)
>
> anotherFact = Factory('SomeThingElse')
> anotherThing = anotherFact(some other args)
>
> The way I thought to do this was to assign the __call__ attribute of
> the fact instance to the appropriate factory method in __init__.  That
does not
> work, as many others have pointed out.  I know there are workarounds.
> The appended code shows the variants I know of.  I can use one of
> them, but they are not quite what I am looking for.
>
> Have I missed the key message that explains how to make new-style
> classes callable, with the called method unique to each instance?

Basically, the system does not look in the instance for the __call__
method for new style classes. I'm not sure why not, or where this
is defined, but that's the way it works.

To get a different callable for each instance, you need to do something
like this:

class fubar(object):
    def __init__(self, callable):
        self.myfunc = callable

    def __call__(self, *a, **b):
        self.myfunc(*a, **b)



>
> thanks,
> -robert




From davesum99 at yahoo.com  Sat Jan 24 11:59:20 2004
From: davesum99 at yahoo.com (smarter_than_you)
Date: 24 Jan 2004 08:59:20 -0800
Subject: Tkinter Base Window
References: <401257c4$0$26116$afc38c87@news.optusnet.com.au>
Message-ID: <c60a5a12.0401240859.28722173@posting.google.com>

Peter Moscatt <pgmoscatt at optushome.com.au> wrote in message news:<401257c4$0$26116$afc38c87 at news.optusnet.com.au>...
> Ok....  I am pretty new to Python (as you may have gathered from previous
> posts).  So now it time for another one of my ridiculous questions....  :-)
> 
> When using 'Tkinter', what is used as the base window to work from, meaning
> what widget do I use to place all other widgets onto to create a custom
> dialog ?
> 
> Pete

see http://www.pythonware.com/library/tkinter/introduction/hello-tkinter.htm

then click 'details' to see the explanation of root=Tk(), which
creates the root window in your native OS.

Note that you can create multiple root windows if you need them, and
have them appear at specific locations on the screen using the
.geometry method (this is dangerous though unless know what your
user's screen setup is)

-dbm


From mhammond at skippinet.com.au  Wed Jan 21 17:55:13 2004
From: mhammond at skippinet.com.au (Mark Hammond)
Date: Thu, 22 Jan 2004 09:55:13 +1100
Subject: PyTime Object and Application Crashing
In-Reply-To: <mailman.569.1074665308.12720.python-list@python.org>
References: <mailman.569.1074665308.12720.python-list@python.org>
Message-ID: <bun00l$22pk$1@arachne.labyrinth.net.au>

Robert Brewer wrote:

> Ryan Scott wrote:
> 
>>When I run a query against an access database and the default 
>>date for 
>>my date/time field is 12/30/1899 the application crashes. 
>>Changing this 
>>to a different date like 03/03/2003 works.
>>The output of the query when returned as a list is as follows:
> 
> 
> AFAICT all dates on or before that date will crash.

That is a new one for me :)  I have fixed the crash here, but calling 
Format() (which print does under the covers) will still fail for those 
dates - but with a ValueError.

Mark.



From cfox at cfconsulting.ca  Fri Jan  9 19:01:12 2004
From: cfox at cfconsulting.ca (Colin Fox)
Date: Sat, 10 Jan 2004 00:01:12 GMT
Subject: LC_MONETARY formatting
References: <pan.2004.01.09.22.19.04.935366@cfconsulting.ca>
	<3FFF38DE.1050603@v.loewis.de>
Message-ID: <pan.2004.01.10.00.01.07.962349@cfconsulting.ca>

On Sat, 10 Jan 2004 00:27:26 +0100, Martin v. Loewis wrote:

> Colin Fox wrote:
<..>
>> I would like to be able to print "$12,345.60"
>> 
>> Is there a format string, or function, or *something* that will take
>> advantage of the monetary formatting info in the locale object? 
> 
> No.

I can't believe that I'm the first person who ever wanted to print a
number as a currency value. Why go to the great lengths of what's provided
in localeconv(), only to leave it up to every single programmer to
re-implement the solution? What a waste of time and effort!

I can't see any reason not to provide a monetary converter within locale,
particularly when it's obviously got all the info it needs. 
 
> 
> IOW, LC_MONETARY is useless for financial applications - if the amount
> is in ?, using the locale's currency symbol would be wrong.

That's true whether you use LC_MONETARY or not. Unless you know the units
your number is in, you can't assign a symbol to it. In my case, I have
numbers that are always in either Canadian or US dollars, so the dollar
sign is fine, and the thousands-separator value is fine.

cf


From jacek.generowicz at cern.ch  Wed Jan  7 07:56:41 2004
From: jacek.generowicz at cern.ch (Jacek Generowicz)
Date: 07 Jan 2004 13:56:41 +0100
Subject: Why ' '.some_string is often used ?
References: <Xns94698C0955DE0stefninnospamyahoofr@213.228.0.4>
Message-ID: <tyf7k03hq7q.fsf@pcepsft001.cern.ch>

"St?phane Ninin" <stefnin.nospam at yahoo.fr> writes:

>   Hi all,
> 
> This is not the first time I see this way of coding in Python and 
> I wonder why this is coded this way:
> 
> Howto on PyXML
> (http://pyxml.sourceforge.net/topics/howto/node14.html) 
> shows it on this function, but I saw that in many other pieces of code:
> 
> def normalize_whitespace(text):
>     "Remove redundant whitespace from a string"
>     return ' '.join(text.split())
> 
> Is there a reason to do instead of just returning join(text.split()) ?

One reason for preferring the former over the latter might be that the
former works, while the latter doesn't:


   >>> text = '   this   is   a   late   parrot  '
   >>> ' '.join(text.split())
   'this is a late parrot'
   >>> join(text.split())
   Traceback (most recent call last):
     File "<stdin>", line 1, in ?
   NameError: name 'join' is not defined
   
You can make it work of course ...
   
   >>> from string import join
   >>> join(text.split())
   'this is a late parrot'

But you shouln't really be polluting your globals with stuff from
modules, so you'd probably prefer to

   import string

rather than

   from string import join

(or, heaver forbid

   from string import *

!)

In which case you would end up writing

   string.join(text.split())

which is a whole whopping 3 characters longer than

   ' '.join(text.split())

:-)

If you are too zealous in your interpretation of the second line of
the Zen of Python[*], then you might also prefer the latter as it is
more explicit than the former.




[*] try: 

   >>> import this


From afriere at yahoo.co.uk  Mon Jan 26 20:27:39 2004
From: afriere at yahoo.co.uk (Asun Friere)
Date: 26 Jan 2004 17:27:39 -0800
Subject: "Lecture Preparation" Discussions on Python
References: <1010a26.0401212246.3cac7d06@posting.google.com>
	<buomik$k34$1@panix1.panix.com>
Message-ID: <38ec68a6.0401261727.1c0f835e@posting.google.com>

aahz at pythoncraft.com (Aahz) wrote in message news:<buomik$k34$1 at panix1.panix.com>...
> In article <1010a26.0401212246.3cac7d06 at posting.google.com>,
> 
> While I'm generally interested in such discussions, I won't be
> participating because I hate web boards.  I vastly prefer netnews, with
> grudging use of e-mail lists.

Nice for those who can get it.  The (educational) institution where I
work have, in their wisdom, decided not to make netnews available, so
I have to access even this newsgroup via a web board (GoogleGroups).

In any case it is good to see Python getting such a strong plug at
UNSW.  Nice collection of Python links on that page BTW.


From amichail at cse.unsw.edu.au  Thu Jan 22 01:46:42 2004
From: amichail at cse.unsw.edu.au (Amir Michail)
Date: 21 Jan 2004 22:46:42 -0800
Subject: "Lecture Preparation" Discussions on Python
Message-ID: <1010a26.0401212246.3cac7d06@posting.google.com>

Hi,

We are planning to have "lecture preparation" discussions in comp3141
at UNSW, where anyone can participate -- not only students taking the
subject.

There is a heavy python component in this class and I was wondering
whether anyone is interested in participating in these discussions. 
We are looking for both python beginners and experts.

You can find the subject and a description of "lecture preparation"
discussions here:

http://www.cse.unsw.edu.au/~cs3141/

The class has about 200 3rd year software engineering students and I
hope many of them will become convinced of just how powerful and
simple python is.

Amir


From guido at python.org  Fri Jan 30 10:40:57 2004
From: guido at python.org (Guido van Rossum)
Date: Fri, 30 Jan 2004 07:40:57 -0800
Subject: LAST CHANCE! PyCon Early bird registration ends Sunday
Message-ID: <200401301540.i0UFevo02863@c-24-5-183-134.client.comcast.net>

If you're planning to come to PyCon DC 2004, make sure to REGISTER by
Sunday, Feb 1.  The early bird registration fee is only $175 ($125 for
students).  Monday it goes up to $250!!!

To register, visit:

    http://www.pycon.org/dc2004/register/

Speakers, you too!!!

DC 2004 will be held March 24-26, 2004 in Washington, D.C.  The keynote
speaker is Mitch Kapor of the Open Source Applications Foundation
(http://www.osafoundation.org/).  There will be a four-day development
sprint before the conference.

For all PyCon information:

   http://www.pycon.org/

--Guido van Rossum (home page: http://www.python.org/~guido/)



From loredo at somewhere.cornell.edu  Fri Jan 23 14:18:17 2004
From: loredo at somewhere.cornell.edu (Tom Loredo)
Date: Fri, 23 Jan 2004 14:18:17 -0500
Subject: [Numpy-discussion] Status of Numeric
References: <CEELJPECNGEGKFNDLHFFGEBKCCAA.perry@stsci.edu>
	<mailman.533.1074574795.12720.python-list@python.org>
Message-ID: <40117379.90CD5732@somewhere.cornell.edu>

Paul Dubois wrote:
> 
> Having two array classes around is a terrible idea. Once you have two
> popular array classes the entire world bifurcates. This plot package
> accepts those and that FFT accepts these, ad nauseum.

I agree with this sentiment.  I write C modules that interface with
arrays, and presently use Numeric, but even with this investment
in Numeric I'd like to see the community as a whole move to numarray.
I don't want to have to keep two different C APIs in my head for
dealing with arrays, one within scipy, the other for numarray.

Speaking as an astronomer (with Python growing increasingly popular
in astronomy), I think it would be Very Bad to have scipy use one
type of array, and much astronomical software use another (numarray
is being developed at Space Tel Science Inst., driven largely by
the needs of astronomers).  The Space Tel work is likely to make
astronomers a big part of Python's scientific computing user base,
and thus a big part of scipy's user base.  Having to learn two
array APIs (even if just on the C module level) will be an
obstacle to developers and users alike.

-Tom Loredo

-- 

To respond by email, replace "somewhere" with "astro" in the
return address.


From jjl at pobox.com  Mon Jan 12 16:16:50 2004
From: jjl at pobox.com (John J. Lee)
Date: 12 Jan 2004 21:16:50 +0000
Subject: How to know if a system command doesn't exist?
References: <KxzMb.1692$PK6.16492@nnrp1.uunet.ca>
	<8KzMb.1701$PK6.16708@nnrp1.uunet.ca>
Message-ID: <87r7y450l9.fsf@pobox.com>

Nicolas Fleury <nid_oizo at yahoo.com_remove_the_> writes:
> Nicolas Fleury wrote:
[...]
> >     How can I know if a system command doesn't exist?  All the ways
> > I have tried behave like if the system command was existing but
> > returning one.  I don't want to sound provocative, but open in Perl
[...]

Haven't tried popen(), but I assume C's system() (of which os.system()
is a trivial wrapper, on posix-y OSes) is implemented in terms of
popen() (or both are implemented in terms of similar lower-level
stuff).  I get different return codes from system() depending on
whether the program exists or not, as expected:

>>> os.system("nonsense")
sh: nonsense: command not found
32512
>>> os.system("ls")
[...snip directory listing...]
0
>>> os.system("ls nonsense")
ls: nonsense: No such file or directory
256
>>>


John


From paul at prescod.net  Sat Jan 31 12:40:04 2004
From: paul at prescod.net (Paul Prescod)
Date: Sat, 31 Jan 2004 09:40:04 -0800
Subject: Python vs. Io
In-Reply-To: <711c7390.0401301726.3e38da27@posting.google.com>
References: <711c7390.0401291301.3f95794@posting.google.com>	<D6wSb.6538$qU3.576425@news20.bellglobal.com>
	<711c7390.0401301726.3e38da27@posting.google.com>
Message-ID: <401BE874.3080704@prescod.net>

Daniel Ehrenberg wrote:
> "Sean Ross" <sross at connectmail.carleton.ca> wrote
> 
\>
> I'm not sure how to tell you this so I'll just give a heavily
> commented example (comments in Io are with #, //, or /* */)
> 
> parentProto := Object clone //makes parentProto a new object
> //:= is used for creating new variables
> parentProto shared := 5 //parentProto's new slot shared holds 5

Do you know why the creator of IO decided not to use the now-ubiquitous 
"." operator? I don't know whether I can define a "." operator that has 
the appropriate behaviour but that wouldn't help anyhow.

  Paul Prescod




From skip at pobox.com  Fri Jan 16 10:44:42 2004
From: skip at pobox.com (Skip Montanaro)
Date: Fri, 16 Jan 2004 09:44:42 -0600
Subject: Bug or feature?
In-Reply-To: <20040116153606.GA25928@intarweb.us>
References: <bu58st$1ha3$1@news.rtcomm.ru>
	<3dtid1-594.ln1@beastie.ix.netcom.com>
	<ZvidncM7G8svuZrdRVn-jA@comcast.com>
	<1ljkd1-053.ln1@beastie.ix.netcom.com>
	<20040116153606.GA25928@intarweb.us>
Message-ID: <16392.1770.961806.256593@montanaro.dyndns.org>


    >> Now that you mention it... Yeah... Can you imagine trying to figure 
    >> out what something like
    >> 
    >> alist = ['j', 'i', 'h', 'g', 'f', 'e', 'd', 'c', 'b', 'a']
    >> res = alist[:5] + alist.sort() + alist[5:]
    >> 
    >> was supposed to return?

    ...

    >> The only "known" is that the middle is supposed to be abcdefghij, but 
    >> the left and right ends depend solely on order of evaluation...

That's easy.  You get a TypeError exception, because alist.sort() returns
None.

Like Jp said:

    Jp>   Doesn't seem to be a problem, after all.

Skip



From lkcl at lkcl.net  Sun Jan 25 08:02:48 2004
From: lkcl at lkcl.net (Luke Kenneth Casson Leighton)
Date: Sun, 25 Jan 2004 13:02:48 +0000
Subject: [ANN] Custom 0.8-1 Released
Message-ID: <20040125130248.GA9327@lkcl.net>

Custom 0.8-1
------

	custom is an e-commerce solution for small to medium-sized
	businesses that provides:
	
	- a customisable web front-end for customers and
	  Point-of-Sale staff to place orders
	  
	- for warehouse staff to manage stock
	
	- for accountants and sales staff to manage and generate invoices
	
	- for purchasing managers to keep track of suppliers and
	  competitive pricing.

Download
--------

	http://sf.net/projects/custom
	http://sf.net/projects/pysqldb


OS Requirements
---------------

	Custom is a pure Python application with no critical OS
	dependencies.
	
	Therefore it is entirely your choice as to what OS you use,
	but it must obviously run python (see http://python.org).
	Python is known to run on GNU/Linux, all version of Unix,
	all the BSDs, BEOS, MAC/OS 10, and many others.


Software Requirements
---------------------

	This package requires or uses some additional software
	packages, which can all be obtained as RPMs, Debian
	Packages or compiled from Source if you feel the need.
	At each site, RPMs, DEBs and source are all typically
	available for download.

	You will need:

	- An up-to-date web server capable of SSL (if you need it)
	  and also capable of running CGI-bin scripts.  e.g. Apache2
	  (http://apache.org)

	- Python 2.1 or greater
	  (http://python.org)

	- the pysqldb package version 0.6 or greater
	  (http://sf.net/projects/pysqldb)

	- EITHER:

		- MySQL client libraries
		(http://mysql.org)

		- Andy Dustman's MySQLdb package (requires MySQL client)
		  (http://sf.net/projects/mysqldb)

	  OR:

		- Pysxqmll (a Python / MS-SQL / XML client for MS-SQL 2000)
		(http://sf.net/projects/pysxqmll) [what a stupid name.]

	- The mxDateTime and DateTime packages 
	  (http://www.egenix.com/files/python/mxDateTime.html)

	- PyCrypto version 1.9a1 or greater
	  (http://sf.net/projects/pycrypto) 

	- Python HTML-TMPL (generates HTML from templates)

	In case you were wondering, PostgreSQL and SAPdb are under
	investigation to be added into the database abstraction
	system that custom uses.

	custom uses some features in the SocketServer class that
	were introduced in Python 2.1.

	If you wish to stick with Python 2.0, you may wish to
	copy over the SocketServer.py file from the distribution
	of Python 2.1 or greater, and use that (making sure that
	you back up your original SocketServer.py file!)


Debian install
------

	It's a lot easier if you are using Debian: here is a list of
	the package names.  It'll be even easier once the Debian
	packaging is released.

	- python-crypto
	- python-egenix-mxdatetime
	- python-mysqldb
	- python-htmltmpl
	- apache or apache2
	- python-pysqldb

	If you install the three python packages using apt-get or dselect,
	that should be enough to pull in all the dependencies
	(including Python 2.3 and MySQL) except for python-pysqldb which
	you will likely still need to manually download from
	http://sf.net/projects/pysqldb


SQL
---

	You must also install MySQL or MS-SQL 2000 on a server,
	where you may wish to install the SQL server on a
	separate system.

	If you do so, as noted above you will need to put the
	MySQL or MS-SQL client libraries onto the Custom Server.

	For various reasons, a high-availability cluster pair is
	recommended for your SQL system.

	You WILL be able to run the Back Office program monitord.py,
	on a HA cluster, because it is designed to cope with several
	concurrent copies of monitord.py running off the same SQL
	server.
	
	monitord.py is smart enough to lock the job scheduling table
	in the SQL database before taking a scheduled job out of
	the queue, so if running a SQL cluster it must obviously
	support table locking - you need to check!





From RAWBOBB at hotmail.com  Sun Jan  4 21:42:23 2004
From: RAWBOBB at hotmail.com (bobb)
Date: 4 Jan 2004 18:42:23 -0800
Subject: Copying a blob from one mysql record to another with a where clause
Message-ID: <521cddac.0401041842.32f633b7@posting.google.com>

(I'm a long term newbie :) )
I wanted to copy a blob's contents in mysql in python from one record to another.
I had a heck of a time with it, so I wanted to post it for others.
The where clause was the tricky part for me.
It probably has poor syntax, but it works.
(Obviously) it can be used cross table and across db's.


import MySQLdb

con0 = MySQLdb.connect(host="localhost",user="",passwd="",db="in")
con1 = MySQLdb.connect(host="localhost",user="", passwd="", db="in")


sourcefield = 'logo'
sourceid = 2514
# A string
s = 2515

curs0=con0.cursor()
selectstring = "select %s from table where id = %s" % (sourcefield, sourceid)
curs0.execute(selectstring)

sourceresult = curs0.fetchone()

cursor1 = con1.cursor()


s1 = "update table set "+ sourcefield + " = %s where id = " 
s2 = s1 + str(s)
tup = s2
cursor1.execute(tup[::],(sourceresult )) 

con0.close()
con1.close()


From seanl at chaosring.org  Sun Jan  4 18:05:10 2004
From: seanl at chaosring.org (Sean R. Lynch)
Date: Sun, 04 Jan 2004 15:05:10 -0800
Subject: Creating a capabilities-based restricted execution system
In-Reply-To: <bta3hv$17s1$1@nadya.doma>
References: <LmmdnUn4seDeGWuiXTWc-w@speakeasy.net> <bt788l$1pej$1@nadya.doma>
	<d7ycncKp5rket2qiXTWc-g@speakeasy.net> <bt7i9i$236v$1@nadya.doma>
	<srudnTjvU9BOH2qiRVn-uA@speakeasy.net> <bta3hv$17s1$1@nadya.doma>
Message-ID: <mvScnSDrma66AWWiXTWc-g@speakeasy.net>

Serge Orlov wrote:
> "Sean R. Lynch" <seanl at chaosring.org> wrote in message news:srudnTjvU9BOH2qiRVn-uA at speakeasy.net...
> 
>>Ok, I think you've pretty much convinced me here. My choices for
>>protected attributes were to either name them specially and only allow
>>those attribute accesses on the name "self" (which I treat specially),
>>or to make everything protected by default, pass all attribute access
>>through a checker function (which I was hoping to avoid), and check for
>>a special attribute to define which attributes are supposed to be
>>public. Do you think it's good enough to make all attributes protected
>>as opposed to private by default?
> 
> 
> Are you talking about C++ like protected fields and methods? What if
> untrusted code subclasses your proxy object?

Hmmm. I was thinking you'd trust those you were allowing to subclass 
your classes a bit more than you'd trust people to whom you'd only give 
instances, but now that you mention it, you're right. I should make all 
attributes fully private by default, requiring the progammer to declare 
both protected and public attributes, and I should make attributes only 
writable by the class on which they're declared. I guess I also need to 
make it impossible to override any attribute unless it's declared OK to 
do so.

I wonder if each of these things can be done with capabilities? A 
reference to a class is basically the capability to subclass it. I could 
create a concept of "slots" as well. This would require a change in 
syntax, however; you'd be calling setter(obj, value) and getter(obj), 
and this isn't really something I could cover up in the compiler. I 
think I'll forget about this for now because E just uses Java's own 
object encapsulation, so I guess I should just stick with creating 
Java-like object encapsulation in Python.

I need to implement a callsuper() function as well, because I don't want 
to be giving programmers access to unbound methods.

> Thinking about str.encode I conviced myself that global state shouldn't
> be shared by different security domains so that means codecs.py and
> __builtins__ must be imported into each security domain separately.
> It's pretty easy to do with codecs.py since it's python code. But importing
> __builtins__ more than once is pretty hard since it wasn't designed
> for that.

Global *mutable* state shouldn't be shared, AFAICT. I believing making 
sure no mutable state is reachable through __builtins__ and having a new 
globals dict for each security domain should be enough. Any modules that 
are imported would need to be imported separately for each domain, which 
should be possible with a modified __import__ builtin. I don't have any 
intention of allowing import of unaudited C modules.


From martin at v.loewis.de  Sun Jan 11 04:10:45 2004
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sun, 11 Jan 2004 10:10:45 +0100
Subject: Python And Internationalization maybe a pre-pep?
In-Reply-To: <YSKLb.10550$5V2.17781@attbi_s53>
References: <3ffede43$0$563$b45e6eb0@senator-bedfellow.mit.edu>
	<3FFF36A1.40303@v.loewis.de> <YSKLb.10550$5V2.17781@attbi_s53>
Message-ID: <40011315.7070000@v.loewis.de>

Brian Kelley wrote:
> I don't see too much difference between using
> _("STRING")
> 
> to indicate a string to be internationalized and
> i"STRING"
> 
> Except that the later will be automatically noticed at compile time, not 
> run-time.

I'm not really sure what "compile time" is in Python. If it is the time
when the .pyc files are generated: What happens if the user using the
pyc files has a language different from the language of the
administrator creating the files?

Or, what precisely does it mean that it is "noticed"?


>> Using what textual domain?
>>
> I am using the same mechanism as gettext but tying it into the "import 
> locale" mechanism.

That does not answer my question? How precisely do you define the
textual domain?

In gettext, I typically put a function at the beginning of each module

def _(msg):
   return gettext.dgettext("grep", msg)

thus defining the textual domain as "grep". In your syntax, I see no
place to define the textual domain.

> I think this happens fine in both cases.  The mechanism for 
> internationalizing with wxPython just didn't feel, well, pythonic.  It 
> felt kind of tacked into place.  Of course I feel the same way about 
> most C macros :)

Can you be more specific? Do you dislike function calls?

> Perhaps I am optimizing the wrong end of the stick.  

Why is this an optimization in the first place? Do you make anything run
faster? If so, what and how?

> Compile-time generation just feels safer to me.  The code-analyzer might 
> miss special cases and what not, but if it is generated at compile time 
> it will work all the time.

Please again elaborate: What is compile-time, and what is generation,
in this context?

> Since you brought it up, how does gettext handle multiple users?  Does 
> each user get a different gettext library (dll) instance?

Gettext, in Python, is a pure Python module - so no DLL.

The gettext module provides the GNUTranslation object. You can have
multiple such objects, and need to explicitly use the language's
object on gettext() invocation, e.g.

   print current_language.gettext("This is good")

If you can be certain that users will be subsequent, you can do

def _(msg):
    return current_language.gettext(msg)

print _("This is good")

There might be other ways to determine the current context, e.g.
by looking at thread state. In that case, you still can use
the _ function, but implement it in looking at the thread state.

Regards,
Martin



From mhammond at skippinet.com.au  Fri Jan 30 18:40:33 2004
From: mhammond at skippinet.com.au (Mark Hammond)
Date: Sat, 31 Jan 2004 10:40:33 +1100
Subject: win32com - .ocx won't Dispatch...
In-Reply-To: <mailman.1004.1075413376.12720.python-list@python.org>
References: <mailman.962.1075345407.12720.python-list@python.org>
	<mailman.1004.1075413376.12720.python-list@python.org>
Message-ID: <bveq1n$1eqh$2@arachne.labyrinth.net.au>

Ray Schumacher wrote:

> So, the util class Dispatches, but all calls (properties and functions) give 'Catastrophic failure'
> Is this really some sort of types problem with this OCX?
> "pywintypes.com_error: (-2147418113, 'Catastrophic failure', None, None)"

My guess is that your OCX is a true OCX, and therefore needs a full GUI 
environment.  Pythonwin can host these - see the 
pythonwin\pywin\demos\ocx directory, and modify one of these to suit. 
wxPython can also apparently host OCX controls in a similar way, but I 
have no details.

Mark.



From fsc at fuentez.com  Tue Jan 27 01:23:05 2004
From: fsc at fuentez.com (fsc at fuentez.com)
Date: Tue, 27 Jan 2004 01:23:05 -0500
Subject: EMAIL REJECTED
Message-ID: <200401270623.i0R6Mgiv022802@wmsc.fuentez.com>

Violation found in email message.

From: python-list at python.org
To: hildjj at fuentez.com




From lists at andreas-jung.com  Fri Jan 16 07:28:15 2004
From: lists at andreas-jung.com (Andreas Jung)
Date: Fri, 16 Jan 2004 13:28:15 +0100
Subject: Searching for UTF8 capable font for REPORTLAB
Message-ID: <2147483647.1074259695@[192.168.0.102]>

Reportlab has some problems with creating PDFs from UTF8 encoded text. For 
this reason
they are using a truetype font rina.ttf which looks *very ugly*. Does 
anyone know of a
suitable free available truetype font that works with UTF8?

-aj




From jseale18 at insightbb.com  Mon Jan 19 15:39:18 2004
From: jseale18 at insightbb.com (Jeff Seale)
Date: Mon, 19 Jan 2004 20:39:18 GMT
Subject: Tkinter color names/codes
Message-ID: <Xns94759F3BCD0B7jseale18insightbbcom@204.127.199.17>

I just happend to notice that there are very FEW colors that you have to 
generate using #hex codes. But I was wondering, how many colors have names 
assigned to them in Tkinter and what are their #hex translations? It'd be 
nice to know these so I don't accidentally create a color that already has 
a name.


From km at mrna.tn.nic.in  Wed Jan 14 17:02:31 2004
From: km at mrna.tn.nic.in (km)
Date: Thu, 15 Jan 2004 03:32:31 +0530
Subject: best book
Message-ID: <20040114220231.GA15846@mrna.tn.nic.in>

Hi all,

What is the best book to start with python ? i am have been working since 1 yr with Perl. 

 kindly enlighten,

thanks,
 KM





From mcfletch at rogers.com  Fri Jan  9 19:35:31 2004
From: mcfletch at rogers.com (Mike C. Fletcher)
Date: Fri, 09 Jan 2004 19:35:31 -0500
Subject: Straw poll on Python performance (was Re: Python is far from
 a	top performer ...)
In-Reply-To: <boguvv8d25t1jmkmhdjpuojrtjnp39j1vc@4ax.com>
References: <ryELb.238$tK2.228@amstwist00><3fff234a$0$129$e4fe514c@dreader3.news.xs4all.nl>	<3FFF26A1.943DEA84@engcorp.com>	<026e01c3d702$970ec5a0$6401fea9@YODA>	<mailman.251.1073690366.12720.python-list@python.org>
	<boguvv8d25t1jmkmhdjpuojrtjnp39j1vc@4ax.com>
Message-ID: <3FFF48D3.2000106@rogers.com>

Rene Pijlman wrote:

>Mike C. Fletcher:
>  
>
>>I am often found optimising.
>>    
>>
>
>By an unoptimized or by an optimizing coworker? :-)
>  
>
Well, in a perfect world, it would be by a lovely and svelte lady, 
missing her husband and seeking to drag me off to connubial bliss (we'll 
assume for propriety's sake that the husband would be me), but in my sad 
and lonely condition, it's normally I who finds myself late at night, 
feverishly optimising ;) :) .

All a man really needs to be happy is work, and a woman to drag him away 
from it, or so I'm told,
Mike(y)

_______________________________________
  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://members.rogers.com/mcfletch/






From deets_noospaam at web.de  Thu Jan 22 13:12:24 2004
From: deets_noospaam at web.de (Diez B. Roggisch)
Date: Thu, 22 Jan 2004 19:12:24 +0100
Subject: Simple requests sequentialiser?
References: <mailman.658.1074790862.12720.python-list@python.org>
Message-ID: <bup3q8$vs3$00$1@news.t-online.com>

> I confess that I have spent very little time on finding a solution to
> this yet. I have a feeling that this should be a piec of cake for
> python  possibly with twisted or even without  it....
> 
> Is there anyone that can give me a pointer to an example or to a
> specific place in the voluminous documentation of python and tools for
> such a thing....

You should investigate into twisted - it is _really_ worth the effort, and
not so complicated at all.

BTW, there is no need for multiple threads - usually, several network
connections can be processed by one thread/process. As long as you don't
plan to server thousands of requests per second....

Diez


From martin at v.loewis.de  Fri Jan 16 18:08:21 2004
From: martin at v.loewis.de (=?ISO-8859-1?Q?=22Martin_v=2E_L=F6wis=22?=)
Date: Sat, 17 Jan 2004 00:08:21 +0100
Subject: Retrive unicode keys from the registry
In-Reply-To: <69ZNb.15222$Wa.2798@news-server.bigpond.net.au>
References: <brp3bzwj.fsf@python.net>
	<KSXNb.15179$Wa.2061@news-server.bigpond.net.au>
	<1xpzaa8i.fsf@python.net>
	<69ZNb.15222$Wa.2798@news-server.bigpond.net.au>
Message-ID: <40086EE5.7020708@v.loewis.de>

Neil Hodgson wrote:

>    This is somewhat unpleasant, requiring runtime conditional code. For the
> Python standard library, in posixmodule.c, places where there is a need to
> branch first check that the OS is capable of wide calls with
> unicode_file_names(), then check if the argument is Unicode and if it is
> then it calls the wide system API. While the wide APIs do not work on 9x,
> they are present so the executable will still load.

I believe the story would be completely different for the registry: the
wide registry functions are available on all Windows versions, AFAIK.

Contributions are welcome.

Regards,
Martin



From jcarlson at nospam.uci.edu  Mon Jan 26 10:21:17 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Mon, 26 Jan 2004 07:21:17 -0800
Subject: compress string of data
In-Reply-To: <wz4quj116k.fsf@nono.cs.uu.nl>
References: <bv0gev$2ni$1@nsnmrro2-gest.nuria.telefonica-data.net>
	<mailman.765.1075042168.12720.python-list@python.org>
	<wz4quj116k.fsf@nono.cs.uu.nl>
Message-ID: <bv3bdd$a0j$3@news.service.uci.edu>

Piet van Oostrum wrote:

>>>>>>Gerrit Holl <gerrit at nl.linux.org> (GH) wrote:
> 
> 
>>>How i could compress string of data?.
>>>
>>>>>import zlib
>>>>>zlib.compress("Hello, world")
> 
> GH> 'x\x9c\xf3H\xcd\xc9\xc9\xd7Q(\xcf/\xcaI\x01\x00\x1b\xd4\x04i'
> 
> GH> http://www.python.org/doc/current/lib/module-zlib.html
> 
> Waw, that compresses it from 12 bytes to 20 bytes :=)


There is no such thing as universal compression - some compressions 
result in expansion.

  - Josiah


From ny_r_marquez at yahoo.com  Thu Jan 29 15:55:24 2004
From: ny_r_marquez at yahoo.com (R.Marquez)
Date: 29 Jan 2004 12:55:24 -0800
Subject: Simple Database Package
References: <mailman.911.1075300017.12720.python-list@python.org>
	<8089854e.0401290034.4d57a45d@posting.google.com>
	<401925bb$0$575$b45e6eb0@senator-bedfellow.mit.edu>
Message-ID: <8a27e309.0401291255.aeb71b5@posting.google.com>

Brian,

There are several embeded database management systems available that
you can use through Python.  Gadfly is a pure Python database that is
small and good enough for a lot of things.  It is an easy way to dip
your toes in the SQL language.  However, I would ask you, how much
"database" do you want to learn.  Do you want to learn just enough to
be able to write standalone applications, or do you think you will
soon want to write applications on a server with multiple users
accessing it simultaneously?  If the latter, I would recommend that
you first invest some time understanding concepts of the relational
model.  The DB Special Interest Group has some nice suggested books on
this subject.  You may then be tempted into going with a more feature
rich database such as Firebird (through the Kinterbasdb python
module).

-Ruben


From none at none.net  Fri Jan  9 16:44:04 2004
From: none at none.net (Iwan van der Kleyn)
Date: Fri, 09 Jan 2004 22:44:04 +0100
Subject: Python is far from a top performer according to benchmark
	test...
In-Reply-To: <ryELb.238$tK2.228@amstwist00>
References: <ryELb.238$tK2.228@amstwist00>
Message-ID: <3fff234a$0$129$e4fe514c@dreader3.news.xs4all.nl>

Carl wrote:
> I think this is an unfair comparison! I wouldn't dream of developing a
> numerical application in Python without using prebuilt numerical libraries
> and data objects such as dictionaries and lists.

Well, that may be true. And many applications spend most of their time 
in fast libraries anyway (GUI/DB/app servers) etc. Nice examples are Boa 
Constructor and Eric3 which are fully implemented in Python and run 
comfortably fast, thanks to the WxWindows and Qt libraries.

But I really dont' swallow the argument. In the few years that I'm 
working with Python, I've encountered  on several occasions performance 
bottlenecks. And often a solution through partial implementation in C or 
improvements in the algorithm is just not feasible. To paraphrase Kent 
Beck: in real life you make your program run, then work and then your 
manager says you've run out of time. You just cannot make it run as fast 
as you would like it as well.

In other words: it would be nice if Python on average would run faster 
so the need for optimisation would lessen. Psyco is a nice option to 
have, though not as clear cut as I thought it would be:

http://www-106.ibm.com/developerworks/linux/library/l-psyco.html

> The greatest advantage of Python is the great increase in productivity and
> the generation of a much smaller number of bugs due to the very clean and
> compact structure Python invites you to produce.

So dogma dictates. And I've found it to be true on many occasions, if 
not all. BUT, the famed Python Productivity Gain is very difficult to 
quantify. And for me that's a BIG but.  I'm trying to push Python within 
my company. Nicely presented "performance benchmarks" go down well with 
management, bevause those are quantities which are supposedly 
understood. And Python does not come across very possitively in that 
respect.

Regards,

Iwan



From dpryde+usenet at cis.strath.ac.uk  Thu Jan 29 10:39:49 2004
From: dpryde+usenet at cis.strath.ac.uk (Daniel Pryde)
Date: Thu, 29 Jan 2004 15:39:49 +0000
Subject: Printing/updating output to the screen
Message-ID: <40192945$1@nntphost.cis.strath.ac.uk>

Hi there. I hope this isn't a stupid question to ask, but does anyone 
know how to print out a string without moving to a new line each time 
and simply updating the first line. An example would be, if I wanted to 
have a percentage progress counter that was constantly updating. I'm 
unsure how to do this without printing to a brand new line. Any help 
would be greatly appreciated. Thanks.

Daniel



From footnipple at indiatimes.com  Thu Jan 22 09:08:27 2004
From: footnipple at indiatimes.com (sdfgsd)
Date: Thu, 22 Jan 2004 14:08:27 GMT
Subject: python
References: <mailman.626.1074743244.12720.python-list@python.org>
Message-ID: <vPQPb.71777$873.1379592@twister.tampabay.rr.com>


"Jess Martin" <trickster121990 at hotmail.com> wrote in message
news:mailman.626.1074743244.12720.python-list at python.org...
> i need help.
> im just learning to program and
> every time i try to do a command more than
> a line long it wont work

Assuming you're using windows:

Take your lines of code and put them into their own file with a .py
extention (ie MyProgram.py).

Then go to the command line and into the directory where MyProgram.py
resides and type "python MyProgram.py". This will run your program
containing as many lines of code as you like.




From Johan.Vervoort at utimaco.be  Wed Jan 21 03:17:57 2004
From: Johan.Vervoort at utimaco.be (Johan Vervoort)
Date: Wed, 21 Jan 2004 08:17:57 GMT
Subject: Reading BLOB
Message-ID: <400e3510.18785312@news.eunet.be>

How can I read a binary value from a blob via ODBC (Microsoft VFP
driver-win32all)? The value seems to be truncated at the first '\0'

TIA


From peter at engcorp.com  Wed Jan 14 09:54:24 2004
From: peter at engcorp.com (Peter Hansen)
Date: Wed, 14 Jan 2004 09:54:24 -0500
Subject: error at "import anydbm"
References: <40042edd$0$24038$626a54ce@news.free.fr>
	<4004482A.A66C2886@engcorp.com>
	<Bh_Mb.15554$RV5.9386@fe2.texas.rr.com>
Message-ID: <40055820.B35F9A84@engcorp.com>

Paul McGuire wrote:
> 
> "Peter Hansen" <peter at engcorp.com> wrote in message
> news:4004482A.A66C2886 at engcorp.com...
> >
> > Generally speaking, you should try to avoid using the same names as
> > the standard library modules for your own code.
> >
> >
> This is an understandable limitation, but for new (and some not-so-new)
> Python users, it is not always obvious what module names to avoid.

This gives a good summary: http://www.python.org/doc/current/modindex.html  :-)

I think the issue actually comes up relatively rarely.  I say that partially
because problems stemming from this seem relatively infrequent in the
mailing list/newsgroup, and partly because the standard library modules
are fairly loosely coupled, and the issue above arose (I believe) only because 
one standard library module was importing another which the user didn't
know would be imported, and it matched a name he had used.

Avoiding the basic ones, like "sys", "os", and "math", along with any that
you are actually importing elsewhere in your application will probably avoid
the issue 99% of the time.

-Peter


From amy-g-art at cox.net  Fri Jan 23 18:29:27 2004
From: amy-g-art at cox.net (Amy G)
Date: Fri, 23 Jan 2004 15:29:27 -0800
Subject: Various strings to dates.
References: <4GfQb.16187$AA6.14368@fed1read03>
	<MFgQb.95539$6y6.1915432@bgtnsc05-news.ops.worldnet.att.net>
	<PRgQb.16209$AA6.9881@fed1read03>
Message-ID: <n7iQb.16224$AA6.5862@fed1read03>

Okay.  I fixed the problem somewhat.  I moved the dateutil directory over to
/usr/local/lib/python2.2/site-packages and I can now import dateutil.  But a
call like this:

from dateutil.parser import parse

results in this error:

ImportError: cannot import name parse

I can 'from dateutil.parser import *' but cannot use parse after that.
I can also 'from dateutil import parser' but that doesn't help either.

Sorry for my inexperience here.  Thanks for all of the help already.

"Amy G" <amy-g-art at cox.net> wrote in message
news:PRgQb.16209$AA6.9881 at fed1read03...
> No it won't.  Unfortunatly I don't necessarily have a comma delimited date
> string.  Thanks for the input though.
>
> The following three date strings is another example of the various date
> formats I will encounter here.
>
> Thursday, 22 January 2004 03:15:06
> Thursday, January 22, 2004, 03:15:06
> 2004, Thursday, 22 January 03:15:06
>
> All of these are essentially the same date... just in various formats.  I
> would like to parse through them and get a comparable format so that I can
> display them in chronological order.
>
>
> "wes weston" <wweston at att.net> wrote in message
> news:MFgQb.95539$6y6.1915432 at bgtnsc05-news.ops.worldnet.att.net...
> > Amy,
> >     I hope there is a better way but, if you go here:
> >
> > http://www.python.org/doc/current/lib/datetime-date.html
> >
> > The new datetime module may help. This and the time mod
> > should get you where you want to go.
> >
> > list     = strdate.split(", ")
> > daystr   = list[0]
> > daynum   = int(list[1])
> > monthstr = list[2]
> > year     = int(list[3])
> > #funct to get a month int is needed
> >
> > d = datetime.Date(y,m,d)
> >
> > wes
> >
> > ---------------------------------------
> >
> > Amy G wrote:
> > > I have seen something about this beofore on this forum, but my google
> search
> > > didn't come up with the answer I am looking for.
> > >
> > > I have a list of tuples.  Each tuple is in the following format:
> > >
> > > ("data", "moredata", "evenmoredata", "date string")
> > >
> > > The date string is my concern.  This is the date stamp from an email.
> > > The problem is that I have a whole bunch of variations when it comes
to
> the
> > > format that the date string is in.  For example I could have the
> following
> > > two tuples:
> > >
> > > ("data", "moredata", "evenmoredata", "Fri, 23 Jan 2004 00:06:15")
> > > ("data", "moredata", "evenmoredata", "Thursday, 22 January 2004
> 03:15:06")
> > >
> > > I know there is some way to use the date string from each of these to
> get a
> > > date usable by python, but I cannot figure it out.
> > > I was trying to use time.strptime but have been unsuccesful thus far.
> > >
> > > Any help is appreciated.
> > >
> > >
> >
>
>




From pygeek at yahoo.com  Fri Jan 23 12:15:28 2004
From: pygeek at yahoo.com (Daniel Han)
Date: 23 Jan 2004 09:15:28 -0800
Subject: any news client in Python?
Message-ID: <2b4c49e0.0401230915.3438810f@posting.google.com>

hello everybody.

i've been looking around for a decent newsreader (not rss)
that's written in Python. Strange, but i found none so far,
i've been to sf.net, freshmeat.net, and even googled that,
still nothing interesting.

let me know if you know of something.
i know some will tell me to use
gnus and the likes, and forget about
a news client in python, but i'm just
curious to use one.



--Daniel Han--


From jjl at pobox.com  Wed Jan 14 21:35:47 2004
From: jjl at pobox.com (John J. Lee)
Date: 15 Jan 2004 02:35:47 +0000
Subject: I come not to bury C++, but to praise it...
References: <mailman.337.1074032524.12720.python-list@python.org>
	<bu3khe$dbm5v$1@ID-46268.news.uni-berlin.de>
	<100aq779r2h2c9e@corp.supernews.com>
	<bu3vku$den0t$1@ID-46268.news.uni-berlin.de>
	<100b2llg67r546f@corp.supernews.com>
Message-ID: <871xq2rla4.fsf@pobox.com>

claird at lairds.com (Cameron Laird) writes:

> In article <bu3vku$den0t$1 at ID-46268.news.uni-berlin.de>,
> Derek <none at none.com> wrote:
[...]
> Got it; thanks.  There's been extensive discussion here and elsewhere
> on just this point.  One of us might follow-up in a bit with a refer-
> ence to highlights ...
[...]

http://www.artima.com/weblogs/viewpost.jsp?thread=4639

http://www.mindview.net/WebLog/log-0025

(important: Bruce Eckel says "weak typing" where he really means
"dynamic typing")

(next two are from this group, both threads and the particular posts
quoted are picked pretty much at random, except that I search for Alex
Martelli's posts, which are reliably good)

http://www.google.com/groups?selm=ft6tb.21351%249_.767461%40news1.tin.it&rnum=1

http://www.google.com/groups?selm=pNfIa.206219%24g92.4232233%40news2.tin.it&rnum=2

The last one (above) is part of an argument between Alex and David
Abrahams, both C++ experts and well-known Pythonistas, but on opposite
sides of the debate.


John


From aahz at pythoncraft.com  Fri Jan 16 13:08:51 2004
From: aahz at pythoncraft.com (Aahz)
Date: 16 Jan 2004 13:08:51 -0500
Subject: data structures module
References: <92c59a2c.0401152306.1c6a17f5@posting.google.com>
Message-ID: <bu99bj$o98$1@panix1.panix.com>

In article <92c59a2c.0401152306.1c6a17f5 at posting.google.com>,
MetalOne <jcb at iteris.com> wrote:
>
>Today, I wanted a priority queue.
>I notice that Python does not have any sorted lists.
>I know that I can call list.sort(), but that seems rather inefficient
>to call every time an element is added.
>I am wondering why there is not a module or modules containing many
>common data structures.  Has such a thing been decided against?  Is it
>that just nobody has done it?  Has nobody else suggested the need for
>it?  Maybe I should search, but I am too tired now, I need sleep.

There's a current discussion on python-dev about a "collections" module
or package, and that's one of the structures under discussion.
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

A: No.
Q: Is top-posting okay?


From na  Mon Jan  5 18:25:58 2004
From: na (Andrew)
Date: Mon, 5 Jan 2004 15:25:58 -0800
Subject: mysql python Newbie Question
References: <vvc80lb8mstue1@corp.supernews.com>
	<vvergt26kp8gf8@corp.supernews.com>
	<70hkc1-r33.ln1@beastie.ix.netcom.com>
	<vvgimvi342asbd@corp.supernews.com>
	<uuamc1-gf4.ln1@beastie.ix.netcom.com>
Message-ID: <vvh8amntpt6r4e@corp.supernews.com>

Ok Thank You




"Dennis Lee Bieber" <wlfraed at ix.netcom.com> wrote in message
news:uuamc1-gf4.ln1 at beastie.ix.netcom.com...
> "Andrew" <na> fed this fish to the penguins on Monday 05 January 2004
> 09:17 am:
>
> >
> >
> > Ok I was able to connect to my local server but how do I find the host
> > address or port number of my remote server
> >
>         Ask the people who own/run the server? {I know, there is an air of
a
> "sneer" in that question -- but your current questions are no longer
> Python related, they apply to /any/ application trying to connect to
> the server}
>
>         If it is a hosting service, you could be out of luck -- the MySQL
port
> may be blocked by a firewall so that only HTTP (and maybe FTP) requests
> can come in, with all MySQL access assumed to be performed using
> scripts that are /on/ the server already.
>
>
> -- 
>  > ============================================================== <
>  >   wlfraed at ix.netcom.com  | Wulfraed  Dennis Lee Bieber  KD6MOG <
>  >      wulfraed at dm.net     |       Bestiaria Support Staff       <
>  > ============================================================== <
>  >        Bestiaria Home Page: http://www.beastie.dm.net/         <
>  >            Home Page: http://www.dm.net/~wulfraed/             <
>




From roy at panix.com  Thu Jan 22 22:41:15 2004
From: roy at panix.com (Roy Smith)
Date: Thu, 22 Jan 2004 22:41:15 -0500
Subject: I support PEP 326
References: <mailman.654.1074788734.12720.python-list@python.org>
	<401081A1.E4C34F00@alcyone.com>
	<qnky8rzid3y.fsf@arbutus.physics.mcmaster.ca>
	<401091D5.EFA41F7@alcyone.com>
Message-ID: <roy-E0394E.22411522012004@reader2.panix.com>

In article <401091D5.EFA41F7 at alcyone.com>,
 Erik Max Francis <max at alcyone.com> wrote:

> "David M. Cooke" wrote:
> 
> > Or, expressing the idea that they're the ends of a number line:
> > 
> > PosInf, NegInf
> > PosInfinity, NegInfinity
> > PositiveInfinity, NegativeInfinity
> > 
> > If IEEE floating point was done correctly everywhere, I'd say make
> > them the corresponding floating-point constants (Inf+ and Inf-).
> 
> The "if" conditional here is bad.  Naming something "infinity" if it
> weren't the IEEE floating point constants as well would be seriously
> misleading.
> 
> After all, this _isn't_ a number line since we're talking about
> comparing arbitrary objects.
> 
> > Or,
> > FreakingHuge, FreakingHugeTheOtherWay
> 
> Don't be silly; that latter one should be FreakingUnhuge :-).

You could name them Python and Perl.  Then you could do stuff like:

for language in allLanguages:
   if Perl < language < Python:
      print language, "is more than Perl but less than Python"


From __peter__ at web.de  Tue Jan 20 07:53:06 2004
From: __peter__ at web.de (Peter Otten)
Date: Tue, 20 Jan 2004 13:53:06 +0100
Subject: converting base class instance to derived class instance
References: <930ba99a.0401200413.5fae6fb9@posting.google.com>
Message-ID: <buj85k$u7s$00$1@news.t-online.com>

Sridhar R wrote:

> Consider the code below,
> 
> class Base(object):
>   pass
> 
> class Derived(object):

I suppose that should be 

  class Derived(Base):
> 
>   def __new__(cls, *args, **kwds):
>     # some_factory returns an instance of Base
>     # and I have to derive from this instance!
>     inst = some_factory() # this returns instance of Base
      
      # using brute force: 
      inst.__class__ = Derived

No guarantees, but the above seems to work.
      
>     return inst  # Oops! this isn't an instance of Derived
> 
>   def __init__(self):
>     # This won't be called as __new__ returns Base's instance
>     pass
> 
>   The constrait is there is some factory function that creates an
> instance of Base class.  So I _can't_ call "Base.__init__(self)" in
> Derived.__init__ func, as their will be _two_ instances (one created
> by Derived.__init__ and other created by the factory function)

As some_factory() returns an already initialized instance of Base, there
should be no need to call it again from inside Derived.__init__()
 
>   Simply I want to get a derived class object, but instead of allowing
> _automatic_ creation of Base instance, I want to use _existing_ Base's
> instance, then use this as a Derived's instance.
> 
>   Will metaclass solve this problem?

I think metaclasses will solve only metaproblems...

Skeptically yours,
Peter



From michele.simionato at poste.it  Thu Jan 22 09:43:38 2004
From: michele.simionato at poste.it (Michele Simionato)
Date: 22 Jan 2004 06:43:38 -0800
Subject: Side note:  Praise to the contibuters to this group
References: <DTFPb.15072$AA6.9820@fed1read03>
Message-ID: <95aa1afa.0401220643.4558d7fc@posting.google.com>

"Amy G" <amy-g-art at cox.net> wrote in message news:<DTFPb.15072$AA6.9820 at fed1read03>...
<snip a well argumented praise to the newsgroup>

One of the main reasons to prefer Python over other languages is 
its newsgroup, indeed.

   Michele


From deets_noospaam at web.de  Fri Jan 30 11:13:25 2004
From: deets_noospaam at web.de (Diez B. Roggisch)
Date: Fri, 30 Jan 2004 17:13:25 +0100
Subject: easiest transition for a PHP website to move to Python?
References: <mailman.1023.1075441969.12720.python-list@python.org>
	<6ee58e07.0401300555.12c07aa3@posting.google.com>
Message-ID: <bvdvr6$96h$05$1@news.t-online.com>

> Most important, what can you use ?
> If you are independ, this means have your own dedicated or virtual
> server, then i would suggest webware which is the most sophisticated
> real python (Zope is not python) solution. Twisted is more a server

Where exactly is zope not "real" python? Just because it features two
templating-methods that are for good reasons _not_ python embedded into
html, its still a python webapp server.

I never used webware, so I can't compare both, but from what I see it
appears to me like tomcat (or maybe jboss) the python way. No problem with
that. But object-relational-mappers are a PITA if you _must_ use them. ZODB
oth is much more of a object-orientied (not relational, though) database.
And thats what I love about it - simply create objects, and save them,
without the need for prior mapping to anything.

For purely content-driven websites, I haven't seen much better solutions
than ZOPE together with some modern CMS, like PLONE or ZMS. 

Regards,

Diez


From jcarlson at nospam.uci.edu  Sun Jan 25 19:48:42 2004
From: jcarlson at nospam.uci.edu (Josiah Carlson)
Date: Sun, 25 Jan 2004 16:48:42 -0800
Subject: progress bar
In-Reply-To: <59e5b87.0401251341.6a95b17e@posting.google.com>
References: <59e5b87.0401231329.6e084d6f@posting.google.com>
	<mailman.715.1074893879.12720.python-list@python.org>
	<9pwQb.5566$vy6.3518@newssvr29.news.prodigy.com>
	<59e5b87.0401251341.6a95b17e@posting.google.com>
Message-ID: <bv1o99$ceq$1@news.service.uci.edu>

> Newbie questions...what is meant by the term 'GUI framework'?  I'm
> aware of Tkinter, wxPython and PythonCard (which, I believe builds
> from a wxPython foundation).  Also, it appears as though pywin.mfc has
> GUI capabilities.  Are Tkinter, wxPython, PythonCard and pywin.mfc
> considered GUI frameworks?  Based on the 'more than enough...' remark,
> it sounds like there are several GUI frameworks out there...what are
> some others?

Really, a GUI framework is a set of stuff that allows the construction 
of a GUI more easily.

One could, with a bitmap drawing function, get mouse click and get key 
press, create a GUI.  This is a pain in the ass.  All the GUI frameworks 
available allow one to do that if they want, but also allow one to use 
predefined sets of operations, objects, etc., commonly in a heirarchy, 
to produce a GUI that is easier to write and to update.


There is a listing of GUI toolkits for various languages and platforms 
available here:
http://home.pacbell.net/atai/guitool/
(I'm feeling lucky entry at google for 'python gui frameworks' )

  - Josiah

P.S. I very much enjoy using wxPython.


From ny_r_marquez at yahoo.com  Thu Jan  1 09:33:20 2004
From: ny_r_marquez at yahoo.com (R.Marquez)
Date: 1 Jan 2004 06:33:20 -0800
Subject: Rekall Binary
References: <8a27e309.0312310529.3c1f43a8@posting.google.com>
	<bsvel2$4n2$1@news.nems.noaa.gov>
Message-ID: <8a27e309.0401010633.20271486@posting.google.com>

root <Chris.Barker at noaa.gov> wrote in message news:<bsvel2$4n2$1 at news.nems.noaa.gov>...
> It looks like
> 
> TotalRekall sells the GPL version for 15 pounds:

That's my point.  (Any takers for $10?)

> 
> http://www.totalrekall.co.uk/modules.php?op=modload&name=CCart&id=16
> 
> Which seems in keeping with:
> 
> "...small charge for Rekall binary distributions to cover our costs"
> 
> By the way, it's still not clear how strong a busness model it is to 
> give away GPL software and expect to make money off services. Have you 
> seen what RedHat is now doing?

How strong a buisness model is GPL software is a relative issue.  If
you mean making the kind of money that software developer houses used
to make in the BOS (Before Open Source) days then it isn't.  But you
just may be able to support your family on it and pay the rent (and
maybe even buy a modest house if you are really successful).  I see
nothing wrong with that.  This are hard times you know.

> 
> In any case, I don't think there is anything wrong with charging more 
> than distribution costs for a binary version of GPL'd program. Creating 
> binaries that work on various versions of various platforms and 
> providing a nice installer for them is quite a bit of work. 

True.  And that may be so in this particular project.  Still, if any
one offers a $10 version they'll sweep that part of the "business
model".  Not a very strong model in my opinion.  By going GPL, the
developers made a decision to leave the old BOS way of competing and
taking on the new one.

> GPL is about freedom: not cheap software. The idea is that it a good 
> thing for all involved for users to have access to source code. That is 
> very different than providing inexpensive software for folks that can't 
> figure out how to compile something (or can't be bothered). Those folks 
> will not be contirbuting to the p[roject, and will not be using the code 
> in their own projects.

However, those folks sometimes get the software into their companies
and demostrate to their peers how productive it is.  This in turn
sometimes results in the application proliferating on the enterprise
to the point where support is needed or desired by the CIO or the CEO.


> That being said, I'm very happy that I can get so much open source 
> software in nicely packaged binary (or easy to compile) form. I only 
> contribute to a VERY SMALL fraction of all the free software I use.
> 

But have you talked to others about it, or directly passed it on? 
That is, even in a very little way, contributing to the health of the
projects in question.


From seanl at chaosring.org  Sat Jan  3 16:38:09 2004
From: seanl at chaosring.org (Sean R. Lynch)
Date: Sat, 03 Jan 2004 13:38:09 -0800
Subject: Creating a capabilities-based restricted execution system
In-Reply-To: <m31xqgag0v.fsf@mira.informatik.hu-berlin.de>
References: <LmmdnUn4seDeGWuiXTWc-w@speakeasy.net>
	<7xznd58klr.fsf@ruckus.brouhaha.com>
	<MGudndQhy9ieEmuiXTWc-w@speakeasy.net>
	<bt6bec$25j$06$1@news.t-online.com>
	<yJacnYxpY-E2kWqiXTWc-w@speakeasy.net>
	<m31xqgag0v.fsf@mira.informatik.hu-berlin.de>
Message-ID: <xLmcnRQRiubcq2qiXTWc-g@speakeasy.net>

Martin v. L?wis wrote:
> "Sean R. Lynch" <seanl at chaosring.org> writes:
> 
> 
>>RestrictedPython avoids this by removing the type() builtin from the
>>restricted __builtins__, and it doesn't allow untrusted code to create
>>names that start with _.
> 
> 
> Ah, ok. That might restrict the usefulness of the package (perhaps
> that is what "restricted" really means here :-).
> 
> People would not normally consider the type builtin insecure, and
> might expect it to work. If you restrict Python to, say, just integers
> (and functions thereof), it may be easy to see it is safe - but it is
> also easy to see that it is useless.
> 
> The challenge perhaps is to provide the same functionality as rexec,
> without the same problems.

Well, I'm providing a same_type function that compares types. What else 
do you want to do with type()? The other option is to go the Zope3 route 
and provide proxies to the type objects returned by type().


From krawlins at ucsc.edu  Thu Jan 22 17:30:44 2004
From: krawlins at ucsc.edu (Kyle Rawlins)
Date: Thu, 22 Jan 2004 14:30:44 -0800
Subject: prog/lib to draw graphs
In-Reply-To: <buoi6g$2qm$07$1@news.t-online.com>
References: <buofpq$1ra$06$1@news.t-online.com>
	<buogqm$chaf$1@netnews.upenn.edu>
	<buoi6g$2qm$07$1@news.t-online.com>
Message-ID: <9E29AC1E-4D2A-11D8-9635-000393BC2E7A@ucsc.edu>


On Jan 22, 2004, at 5:15 AM, Florian Lindner wrote:
> Thanks! (to all)
> Does GraphViz also support the automated optimal placement of nodes? 
> I'll
> have many nodes...

What constitutes optimal is a matter of an entire subfield of graph 
theory, and is pretty different depending on what type of graph you are 
doing.  Nonetheless, graphviz does pretty well without any cues.  In a 
project I used to use it in (a browser for large automatically learned 
ontologies) I would sometimes use it to render thousands of nodes, and 
it would usually look better than I expected.  There is a problem in 
that highly connected large graphs result in a lot of black ink for the 
edges, since in such graph they will be much denser than the DPI of 
your screen.  I'm not sure you'll find any full display of a large 
graph practical for interactive use without a lot of tweaking.

If you do want to use it interactively, be prepared for long waits 
(>30s, sometimes several minutes) for very large graphs.  For small 
graphs, it's near instantaneous.  This is a problem with graph layout 
algorithms in general, however, and not graphviz per se - they do not 
scale very efficiently.  People I know who used ygraph, a commercial 
package, told me that it was not much faster on large graphs.

hope that helps,
-kyle




From jjl at pobox.com  Sat Jan 10 12:46:52 2004
From: jjl at pobox.com (John J. Lee)
Date: 10 Jan 2004 17:46:52 +0000
Subject: Asynchronous HTTP server in standard library ?
References: <btougu$o9b$1@news-reader3.wanadoo.fr> <87eku76cp0.fsf@blakie.riol>
Message-ID: <87ad4vy9v7.fsf@pobox.com>

Wilk <wilkSPAM at OUTflibuste.net> writes:

> "Pierre Quentel" <quentel.pierre at wanadoo.fr> writes:
[...]
> > Any thoughts ?
> 
> I think you'll be welcome in the web-sig !!!
> http://python.org/sigs/web-sig/

Yes, certainly -- don't let it worry you that the discussion died down
for the last month or so.  It'll likely start up again if/when
somebody posts something interesting (or, more accurately, when
somebody posts something controversial ;-).


John


From ptmcg at users.sourceforge.net  Fri Jan  9 11:03:31 2004
From: ptmcg at users.sourceforge.net (Paul McGuire)
Date: Fri, 09 Jan 2004 16:03:31 GMT
Subject: how to speedup this code?
References: <btmgtp$grr$1@chessie.cirr.com>
Message-ID: <nhALb.837$k8.802@be1.texas.rr.com>

"Ognen Duzlevski" <maketo at gronland.freeshell.org> wrote in message
news:btmgtp$grr$1 at chessie.cirr.com...
> Hi all,
>
> I have rewritten a C program to solve a bioinformatics problem. Portion
where most of the time is spent is:
>
> def DynAlign(scoremat,insertmat,delmat,tseq,qseq,tlen,qlen):
>     global ONEINDELPENALTY,OPENGAPPENALTY
>
>     for ndx1 in range(1,tlen+1):
>         for ndx2 in range(1,qlen+1):
>             delmat[ndx1][ndx2] = Min(delmat[ndx1-1][ndx2]+ONEINDELPENALTY,
\
>
Min(scoremat[ndx1-1][ndx2]+OPENGAPPENALTY+ONEINDELPENALTY, \
>
insertmat[ndx1-1][ndx2]+OPENGAPPENALTY+ONEINDELPENALTY))
>             insertmat[ndx1][ndx2] =
Min(insertmat[ndx1][ndx2-1]+ONEINDELPENALTY, \
>
Min(scoremat[ndx1][ndx2-1]+OPENGAPPENALTY+ONEINDELPENALTY, \
>
delmat[ndx1][ndx2-1]+OPENGAPPENALTY+ONEINDELPENALTY))
>             scoremat[ndx1][ndx2] = Min(scoremat[ndx1-1][ndx2-1], \
>                             Min(delmat[ndx1-1][ndx2-1],
insertmat[ndx1-1][ndx2-1])) + \
>                             GetFitnessScore(tseq,ndx1-1,qseq,ndx2-1)
>
> def Min(a,b):
> if a< b:
> return a
> else:
> return b
>
> In C this is not a big deal, delmat, scoremat and insertmat are int
matrices dynamically allocated and the
> loop-inside-a-loop is pretty fast. However, on python (2.3) it is very
slow. So for comparison, my C version takes 8
> seconds to execute and the python version takes around 730 seconds. I have
narrowed down through visual observation
> (print before and print after entry into the above nested loop) that most
of the time is spent in there. I have also
> tried the Numeric package with their arrays. It speeded things up somewhat
but not considerably.
>
> Any suggestions?
>
> Thank you,
> Ognen

I'm a big fan of "knowing one's blind spots."  It looks to me like you are
using Python, but still thinking in C.  Here are some things Python will be
able to do that C wont.
1. No need to define your own Min() routine - Python has a built-in min()
function that works fine.
2. And even better, the Python min() will accept an arbitrary number of
arguments, not just two.  So instead of calling Min(a,Min(b,c)) you can just
call min(a,b,c).  (This should help quite a bit, as function call overhead
in Python is relatively high.)
3. Access to locals is faster than globals (I'm told).  Try copying
ONEINDELPENALTY and OPENGAPPENALTY to local vars.  Also, since you are not
updating them, the global declaration of ONEINDEL... and OPENGAP... is not
strictly necessary - but I like to include these declarations anyway, as a
reminder that these are globals being accessed.
4. Look at repeated operations, especially in your inner loop.  You
recalculate ndx1-1 many times - how about doing it once in the outer loop
before the second for statement, something like ndx1_1 = ndx1-1, and then
reference ndx1_1 instead (and similar for ndx2-1 and
OPENGAPPENALTY+ONEINDELPENALTY).
5. Look into using the psyco package.  It is very low overhead,
non-intrusive, and can give remarkable results.
6. More performance tips at
http://manatee.mojam.com/~skip/python/fastpython.html, or by Googling for
"python performance".

-- Paul




From OlafMeding at compuserve.com  Thu Jan  8 09:40:37 2004
From: OlafMeding at compuserve.com (Olaf Meding)
Date: 8 Jan 2004 06:40:37 -0800
Subject: Name of the function
Message-ID: <9e5ea2c4.0401080640.64ef5d58@posting.google.com>

I am looking for a way to get at the name of the function (while
executing code inside the function) without (!) knowing the name of
the function.

The code below works, but requires the name of the function.  I am
looking for a way to do the same w/o specifying the name of the
function.

def olaf():
    # requires name of the function
    print olaf.__name__

    # this does not work
    print self.__name__


From eric.brunel at N0SP4M.com  Mon Jan 12 04:26:01 2004
From: eric.brunel at N0SP4M.com (Eric Brunel)
Date: Mon, 12 Jan 2004 10:26:01 +0100
Subject: Moving widgets in Tkinter
References: <qVgMb.3119$q4.2242@newsread3.news.atl.earthlink.net>
Message-ID: <bttono$241$1@news-reader2.wanadoo.fr>

Adonis wrote:
> I wish to manually move widgets in Tkinter, now I have successfully done it,
> but with odd results, I would like to move the widgets with a much smoother
> manner, and better precision.
> 
> Any help is greatly appreciated.
> 
> --
> 
> here is snip of working code:
> 
> from Tkinter import *
> 
> class blah:
> 
>     def MoveWindow(self, event):
>         self.root.update_idletasks()
>         self.f.place_configure(x=event.x_root, y=event.y_root-20)

event.x_root & event.y_root will give you the coordinates of the event in the 
*screen*, which is apparently not what you want. The name "root" traditionally 
used for Tkinter main windows is somewhat confusing here: the window called 
"root" in tk/Tkinter methods is the screen, not your main window.

>     def __init__(self):
>         self.root = Tk()
>         self.root.title("...")
>         self.root.resizable(0,0)
>         self.root.geometry("%dx%d%+d%+d"%(640, 480, 0, 0))
> 
>         self.f = Frame(self.root, bd=1, relief=SUNKEN)
>         self.f.place(x=0, y=0, width=200, height=200)
> 
>         self.l = Label(self.f, bd=1, relief=RAISED, text="Test")
>         self.l.pack(fill=X, padx=1, pady=1)
> 
>         self.l.bind('<B1-Motion>', self.MoveWindow)
>         self.f.bind('<B1-Motion>', self.MoveWindow)
> 
>         self.root.mainloop()
> 
> x = blah()

Doing what you want is a bit more complicated than what you've already done: the 
best way to use event.x_root and event.y_root here is relatively to a former 
recorded position. What I'd do would be the following:

-----------------------------------------
from Tkinter import *

class blah:

     def startMoveWindow(self, event):
         ## When the movement starts, record current root coordinates
         self.__lastX, self.__lastY = event.x_root, event.y_root

     def MoveWindow(self, event):
         self.root.update_idletasks()
         ## Use root coordinates to compute offset for inside window coordinates
         self.__winX += event.x_root - self.__lastX
         self.__winY += event.y_root - self.__lastY
         ## Remember last coordinates
         self.__lastX, self.__lastY = event.x_root, event.y_root
         ## Move inside window
         self.f.place_configure(x=self.__winX, y=self.__winY)

     def __init__(self):
         self.root = Tk()
         self.root.title("...")
         self.root.resizable(0,0)
         self.root.geometry("%dx%d%+d%+d"%(640, 480, 0, 0))

         ## Record coordinates for window to avoid asking them every time
         self.__winX, self.__winY = 0, 0
         self.f = Frame(self.root, bd=1, relief=SUNKEN)
         self.f.place(x=self.__winX, y=self.__winY, width=200, height=200)

         self.l = Label(self.f, bd=1, relief=RAISED, text="Test")
         self.l.pack(fill=X, padx=1, pady=1)

         ## When the button is pressed, make sure we get the first coordinates
         self.l.bind('<ButtonPress-1>', self.startMoveWindow)
         self.l.bind('<B1-Motion>', self.MoveWindow)
         self.f.bind('<ButtonPress-1>', self.startMoveWindow)
         self.f.bind('<B1-Motion>', self.MoveWindow)

         self.root.mainloop()

x = blah()
-----------------------------------------

HTH
-- 
- Eric Brunel <eric dot brunel at pragmadev dot com> -
PragmaDev : Real Time Software Development Tools - http://www.pragmadev.com



From pmagic at snet.net  Tue Jan 27 20:49:51 2004
From: pmagic at snet.net (Paul M)
Date: Tue, 27 Jan 2004 20:49:51 -0500
Subject: Python 2.3.3 : Win32 build vs Cygwin build performance ?
In-Reply-To: <4016d8a3$0$19263$626a54ce@news.free.fr>
References: <4016a71d$0$15004$afc38c87@news.easynet.fr>
	<4016d8a3$0$19263$626a54ce@news.free.fr>
Message-ID: <bv74fr$1sdl$1@netnews.upenn.edu>

Nicolas Lehuen wrote:

> I have reproduced this on another machine. I tried playing with the
> optimizer options (-O, -OO) and the result is the same : on pystone, Cygwin
> 1.5.6-1 + Python 2.3.3-1 is nearly twice as better as the standard Python
> 2.3.3 distribution for Win32...
> 
> I have checked that both distribution are psyco-free. Does anyone have an
> idea of what is going on there ? Better compilation optimisation settings ?
> GCC 3.3.1 producing faster code than MSVC 6 (allright, I can imagine that,
> but twice faster ???) ?
> 
> Regards
> Nicolas
> 

I get results opposite yours (though with an oddity in the CPU seconds 
reported on the Win32 build -- see below).

I'm also using Cygwin 1.5.6-1 + 2.3.3-1 and the stock Python 2.3.3 
distribution for Win32.

Here's my cygwin results:

$ time python /usr/lib/python2.3/hotshot/stones.py
Pystone(1.1) time for 50000 passes = 2.813
This machine benchmarks at 17774.6 pystones/second
          850004 function calls in 5.825 CPU seconds

    Ordered by: internal time, call count

    ncalls  tottime  percall  cumtime  percall filename:lineno(function)
     50000    2.148    0.000    2.207    0.000 pystone.py:184(Proc6)
     50002    1.102    0.000    1.102    0.000 pystone.py:45(__init__)
         1    0.662    0.662    5.825    5.825 pystone.py:79(Proc0)
     50000    0.435    0.000    4.188    0.000 pystone.py:133(Proc1)
     50000    0.340    0.000    0.340    0.000 pystone.py:208(Proc8)
    150000    0.182    0.000    0.182    0.000 pystone.py:203(Proc7)
    150000    0.181    0.000    0.181    0.000 pystone.py:221(Func1)
     50000    0.170    0.000    0.226    0.000 pystone.py:229(Func2)
     50000    0.163    0.000    1.265    0.000 pystone.py:53(copy)
     50000    0.152    0.000    0.214    0.000 pystone.py:160(Proc3)
     50000    0.103    0.000    0.103    0.000 pystone.py:149(Proc2)
     50000    0.072    0.000    0.072    0.000 pystone.py:177(Proc5)
     50000    0.059    0.000    0.059    0.000 pystone.py:246(Func3)
     50000    0.056    0.000    0.056    0.000 pystone.py:170(Proc4)
         1    0.000    0.000    5.825    5.825 pystone.py:67(pystones)
         0    0.000             0.000          profile:0(profiler)



real    0m35.403s
user    0m34.827s
sys     0m0.233s


And my Win 32 results:

C:\Documents and Settings\pmagwene>python c:\Python23\Lib\hotshot\stones.py
Pystone(1.1) time for 50000 passes = 2.44903
This machine benchmarks at 20416.3 pystones/second
          850004 function calls in 6559.446 CPU seconds

    Ordered by: internal time, call count

    ncalls  tottime  percall  cumtime  percall filename:lineno(function)
         1 1689.491 1689.491 6559.412 6559.412 pystone.py:79(Proc0)
     50000  987.212    0.020 2610.494    0.052 pystone.py:133(Proc1)
     50000  775.010    0.016  775.010    0.016 pystone.py:208(Proc8)
     50000  416.668    0.008  637.938    0.013 pystone.py:53(copy)
    150000  409.522    0.003  409.522    0.003 pystone.py:221(Func1)
     50000  406.804    0.008  535.380    0.011 pystone.py:229(Func2)
    150000  396.484    0.003  396.484    0.003 pystone.py:203(Proc7)
     50000  310.752    0.006  445.215    0.009 pystone.py:160(Proc3)
     50000  290.596    0.006  410.274    0.008 pystone.py:184(Proc6)
     50000  239.539    0.005  239.539    0.005 pystone.py:149(Proc2)
     50002  221.310    0.004  221.310    0.004 pystone.py:45(__init__)
     50000  150.247    0.003  150.247    0.003 pystone.py:170(Proc4)
     50000  146.099    0.003  146.099    0.003 pystone.py:177(Proc5)
     50000  119.678    0.002  119.678    0.002 pystone.py:246(Func3)
         1    0.033    0.033 6559.446 6559.446 pystone.py:67(pystones)
         0    0.000             0.000          profile:0(profiler)



The Pystone time and machine benchmark shows that my Win32 build is 
faster, though I don't understand the CPU seconds readout -- the pystone 
benchmark did not last 1.5 hrs!

Maybe it's something odd about my setup? -- dual Xeons (hyperthreading 
enabled), 2.5 GB ram, WinXP...

--Paul


From tjreedy at udel.edu  Tue Jan 20 12:40:34 2004
From: tjreedy at udel.edu (Terry Reedy)
Date: Tue, 20 Jan 2004 12:40:34 -0500
Subject: python As400
References: <mailman.538.1074596683.12720.python-list@python.org>
Message-ID: <3o-dneda6Oma9ZDdRVn-jw@comcast.com>


"Enrique" <enrique.palomo at xgs-spain.com> wrote in message
news:mailman.538.1074596683.12720.python-list at python.org...
>I'm very interested in python for AS/400. I must migrate an application
that
>is running under windows to AS/400.
>Has anyone worked with python in that platform??

Python has been ported to just about everything.  As with many questions
asked here, google is your friend.  You can search both the web and clp
archives.

tjr




From kbass at midsouth.rr.com  Sat Jan 24 15:21:28 2004
From: kbass at midsouth.rr.com (kbass)
Date: Sat, 24 Jan 2004 14:21:28 -0600
Subject: Python and writing a CSV file
References: <mailman.611.1074719029.12720.python-list@python.org>
	<kNDPb.6494$6o4.181@fe2.texas.rr.com>
	<20040121232549.GA28328@mail.theserver.ath.cx>
	<009501c3e07e$80b62e30$97443d42@homebass1>
	<16399.7079.192926.761791@montanaro.dyndns.org>
Message-ID: <000c01c3e2b7$a6eabcc0$97443d42@homebass1>


----- Original Message ----- 
From: "Skip Montanaro" <skip at pobox.com>
To: "kbass" <kbass at midsouth.rr.com>
Cc: "Python List" <python-list at python.org>
Sent: Wednesday, January 21, 2004 6:39 PM
Subject: Re: Python and writing a CSV file


>
>     Kevin> I am new to Python and would like to attempt to write to a CSV
>     Kevin> file. I have reviewed the documentation at
>     Kevin> http://www.object-craft.com.au/projects/csv/ for the csv 1.0
>     Kevin> module but I didn't see any information referring to writing
(oe
>     Kevin> creating) a CSV file with this module. Does this module have
the
>     Kevin> capability to write a CSV file?
>
> Yes, but you should upgrade to 2.3 (if you haven't already) and just use
the
> csv module which comes with it:
>
>     http://www.python.org/doc/current/lib/module-csv.html
>
> Skip

Thanks for responding. Currently we do not have Python 2.3 installed on our
server, is there another way to perform this task with another module or
without a module? Thanks!

Kevin




From kevin at sb.org  Thu Jan 29 13:42:47 2004
From: kevin at sb.org (Kevin Ballard)
Date: Thu, 29 Jan 2004 13:42:47 -0500
Subject: Python & XML & DTD (warning: noob attack!)
References: <pan.2004.01.29.13.04.44.213048.2804@obda.net>
Message-ID: <2004012913424775249%kevin@sborg>

On 2004-01-29 07:04:44 -0500, Igor Fedorow <igor.NOSPAM at obda.net> said:

> I tried xml.dom.ext.PrettyPrint, but it produces only
> 
> 	<?xml version='1.0' encoding='UTF-8'?>
> 	<!DOCTYPE root>
> 	<root>
> 	   ...
> 	</root>
> 
> actually lacking the document type definition.

Why not simply use that, then replace the <!DOCTYPE root> with the DTD? I'm 
sure you can parse it out from the original file.

--
"Remember, no matter where you go, there you are."
                                 -Buckaroo Banzai
Kevin Ballard
http://kevin.sb.org


From rune.froysa at usit.uio.no  Mon Jan 12 02:41:43 2004
From: rune.froysa at usit.uio.no (Rune Froysa)
Date: 12 Jan 2004 08:41:43 +0100
Subject: Unicode and exception strings
References: <svl1xq98gdc.fsf@dresden.uio.no>
	<cf0uvv4m34rgcgoi2nfj3hcgugbah82k96@4ax.com>
Message-ID: <svl4qv17gw8.fsf@dresden.uio.no>

Terry Carroll <carroll at tjc.com> writes:

> On 09 Jan 2004 13:18:39 +0100, Rune Froysa <rune.froysa at usit.uio.no>
> wrote:
> 
> >Assuming an exception like:
> >
> >  x = ValueError(u'\xf8')
> >
> >AFAIK the common way to get a string representation of the exception
> >as a message is to simply cast it to a string: str(x).  This will
> >result in an "UnicodeError: ASCII encoding error: ordinal not in
> >range(128)".
> >
> >The common way to fix this is with something like
> >u'\xf8'.encode("ascii", 'replace').  However I can't find any way to
> >tell ValueErrors __str__ method which encoding to use.
> 
> Rune, I'm not understanding what your problem is.
> 
> Is there any reason you're not using, for example, just repr(u'\xf8')?

The problem is that I have little control over the message string that
is passed to ValueError().  All my program knows is that it has caught
one such error, and that its message string is in unicode format.  I
need to access the message string (for logging etc.).

>          _display_text = _display_text + "%s\n" % line.decode('utf-8'))

This does not work, as I'm unable to get at the 'line', which is
stored internally in the ValueError class (and generated by its __str_
method).

Regards,
Rune Fr?ysa


From jcarlson at uci.edu  Thu Jan 22 11:59:45 2004
From: jcarlson at uci.edu (Josiah Carlson)
Date: Thu, 22 Jan 2004 08:59:45 -0800
Subject: newbie,cgi,os.system,cdrecord
References: <400fe08c$0$326$e4fe514c@news.xs4all.nl>
Message-ID: <20040122085927.026A.JCARLSON@uci.edu>


On Thu, 22 Jan 2004 15:39:47 +0100
Rik van der Helm <HAALrvanderhWEG at xs4all.nl> wrote:

> Hello,
> 
> I am trying to make a backupscript in python, which I want to manage via a 
> webform (cgi). In my script I use os.system to execute the following 
> shellscript:
> "cdrecord -s -dev=0,1,0 -blank=fast -speed=2 fs=8m file.tgz"
> 
> When I execute the pythonscript in the shell, it gets executed well and I 
> get some output from cdrecord. Which I don't understand because I put 
> cdrecord at silent (-s !) I thought.
> 
> When I execute the pythonscript in a webbrowser via cgi, cdrecord also gets 
> executed well but I get an 'Internal Server Error' of Python and in 
> '/var/log/httpd/error_log' it says:
> "malformed header from script. Bad header=Cdrecord 1.11a19 etc....."
> 
> I think I understand what is going wrong. Apache tries to print the output 
> of cdrecord and finds something wrong and stops executing the script. Is 
> this correct ? If this is correct how do I get cdrecord stop making output 
> texts ?
> 
> All suggestions are welcome
> 
> Thanks, Rik
> 

Try:
"cdrecord -s -dev=0,1,0 -blank=fast -speed=2 fs=8m file.tgz > /dev/null"



From spamsucks at Ih8it.com  Wed Jan 14 00:23:56 2004
From: spamsucks at Ih8it.com (WTH)
Date: Wed, 14 Jan 2004 00:23:56 -0500
Subject: ProtoCiv: porting Freeciv to Python CANNED
References: <bsd101$c1oj1$1@ID-207230.news.uni-berlin.de>
	<bu0k7e$bvkci$1@ID-207230.news.uni-berlin.de>
	<40047290$1@news.012.net.il>
	<bu29ea$ct54l$1@ID-207230.news.uni-berlin.de>
Message-ID: <6k4Nb.26887$v16.20922@bignews5.bellsouth.net>

> You try to do something big, you put your money on the line to do it, you
> fail or don't entirely succeed, you give postmortem, you lay all your
cards
> out for others to examine... *then* I will worry about your opinion.

You are seriously delusional.  You seem to be one of those people who is
constantly seeking persecution of some sort.  The kind that feels the need
to bear a cross that no-one seems to think needs bearing (of course they're
all delusional and YOU'RE the sane one...)  Occam's razor...?

    WTH




From donn at u.washington.edu  Wed Jan 14 17:50:18 2004
From: donn at u.washington.edu (Donn Cave)
Date: Wed, 14 Jan 2004 14:50:18 -0800
Subject: I come not to bury C++, but to praise it...
References: <mailman.337.1074032524.12720.python-list@python.org>
	<bu3khe$dbm5v$1@ID-46268.news.uni-berlin.de>
	<100aq779r2h2c9e@corp.supernews.com>
	<donn-DF9867.09340714012004@nntp3.u.washington.edu>
	<100b266i0r70g86@corp.supernews.com>
Message-ID: <donn-5BBDE3.14501814012004@nntp4.u.washington.edu>

In article <100b266i0r70g86 at corp.supernews.com>,
 claird at lairds.com (Cameron Laird) wrote:
...
> Great!  *What* more?  When I look at Python and C++, I see the
> former as having *stricter*, if more dynamic, typing, so I don't
> understand what advantage C++ has in this one regard apart from
> time-of-detection.
> 
> I apologize, by the way, for writing "compile-type" where I 
> intended "compile-time".

Oops, so that was only an accident!  Well, I mean that
the semantics of types are different between C++ and
Python.

When we say Python has "dynamic typing", and C++ has
"static typing", I guess that's the generally accepted
way to describe what they do, but it makes it sound
like they're doing the same thing, only on a different
schedule.  Of course they are not at all doing the same
thing.  It might be more accurate to use a table, like

                 static      dynamic
   C++             yes         no
   Python          no          yes
   Objective C     yes         yes


Python may have stricter dynamic typing than C++ has
static typing, but that's hard to quantify.  On the
other hand, Python has no static typing at all.  There
is no way to tell it ``this function must be applied
to a string and must return an int.''  If applied to
a list instead, there's a non-trivial chance it will
manage to do something absurd with it.  If it returns
None under certain circumstances, there's a non-trivial
chance that value will be stashed away somewhere and
you'll later wonder where the heck that None came from.

Whether that's an advantage for C++ depends on 1) how
important you think that is, and 2) how well you think
C++ does it.  Between those two, I think I'd have to
agree it isn't much of an advantage, but then I'm just
a hacker.  Of course C++ is an easy target, but then
that's the nominal subject here.

   Donn Cave, donn at u.washington.edu


From dlmurray at micro-net.com  Sun Jan  4 21:58:18 2004
From: dlmurray at micro-net.com (Dave Murray)
Date: Sun, 4 Jan 2004 19:58:18 -0700
Subject: Why does this fail?
References: <vvhdlm72386b3c@corp.supernews.com>
Message-ID: <vvhkngs7oachad@corp.supernews.com>

Thank you all, this is a hell of a news group. The diversity of answers
helped me with some unasked questions, and provided more elegant solutions
to what I thought that I had figured out on my own. I appreciate it.

It's part of a spider that I'm working on to verify my own (and friends) web
page and check for broken links. Looks like making it follow robot rules
(robots.txt and meta field exclusions) is what's left.

I have found the library for html/sgml to be not very robust. Big .php and
.html with lot's of cascades and external references break it very
ungracefully (sgmllib.SGMLParseError: expected name token). I'd like to be
able to trap that stuff and just move on to the next file, accepting the
error. I'm reading in the external links and printing the title as a sanity
check in addition to collecting href anchors. This problem that I asked
about reared it's head when I started testing for a robots.txt file, which
may or may not exist.

The real point is to learn the language. When a new grad wrote a useful
utility at work in Python faster than I could have written it in C I decided
that I needed to learn Python. He's very sharp but he sold me on the
language too. Since I often must write utilities, Python seems to be a very
good thing since I normally don't have much time to kill on them.

Dave





From Nikola.Milutinovic at ev.co.yu  Sun Jan  4 11:10:18 2004
From: Nikola.Milutinovic at ev.co.yu (Nikola Milutinovic)
Date: Sun, 4 Jan 2004 17:10:18 +0100
Subject: PROBLEM: compiling C programs that link to Python
Message-ID: <002e01c3d2dd$43f04110$c53da8c0@home>

Hi all.

I'm not subscribed to the list, so all replies to me mail directly.

I ran into a small problem, for which we have found a workaround. I was compiling PostgreSQL v7.4.1 and it's PL/Python module. Compilation failed on lines which had this:

typedef struct PLyPlanObject {
  PyObject_HEAD;
  ...
} PLyPlanObject;

The problem was in that semicolon following "PyObject_HEAD", since that is a CPP define which expands to this:

typedef struct PLyPlanObject {
  int ob_refcnt ; struct _typeobject * ob_type ; ;
  ...
} PLyPlanObject;

That extra ";" breaks compiling on strict ANSI-C compilers (or at least on mine - DEC CC on Tru64 UNIX). The workaround was to remove the ";" from plpython.c source file. It could be that GNU C is not complaining on this, since it is more lenient on C irregularities.

The idea I'd like to float here is that you guys remove the trailing ";" from your "#define ...". The source looks much more natural with a semicolon at the end.

I know that this idea is going to create resistance, "it is working for us", "it is working on GCC", "it will create other changes in existing source base", "you've solved your problem". The only argument in my favour I can give is that, well, C standard doesn't recognize "; ;" in "structs". So, if you want to create CPP constructs like that "#define", create them so they can be used without breaking the standards.

TYIA,
Nix.
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From andymac at bullseye.apana.org.au  Mon Jan 19 17:07:35 2004
From: andymac at bullseye.apana.org.au (Andrew MacIntyre)
Date: Tue, 20 Jan 2004 09:07:35 +1100 (EST)
Subject: Python 2.3.3 on FreeBSD 4.8
In-Reply-To: <20040119030514.48456.qmail@web60501.mail.yahoo.com>
References: <20040119030514.48456.qmail@web60501.mail.yahoo.com>
Message-ID: <20040120090330.F48694@bullseye.apana.org.au>

On Sun, 18 Jan 2004, Taylor Leese wrote:

> I am trying to compile Python 2.3.3 on FreeBSD 4.8 and
> I am getting this compiling error. Anybody have any
> ideas?

How did you configure?

I've built both 2.2.3 & 2.3.3 on FreeBSD 4.8 without the problems you
mention.

Having unpacked the tarball and changed into the top level directory of
the source tree, I just do:

  ./configure --with-fpectl
  make

You should also be able to build using the ports framework if you've
updated the ports components.

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



From exarkun at intarweb.us  Sat Jan 31 15:38:02 2004
From: exarkun at intarweb.us (Jp Calderone)
Date: Sat, 31 Jan 2004 15:38:02 -0500
Subject: Python vs. Io
In-Reply-To: <711c7390.0401311220.763be80a@posting.google.com>
References: <711c7390.0401291301.3f95794@posting.google.com>
	<qnkfzdyieg0.fsf@arbutus.physics.mcmaster.ca>
	<711c7390.0401301710.4353274@posting.google.com>
	<bvf6kc$2v$2@news.service.uci.edu>
	<711c7390.0401311220.763be80a@posting.google.com>
Message-ID: <20040131203802.GA1664@intarweb.us>

On Sat, Jan 31, 2004 at 12:20:52PM -0800, Daniel Ehrenberg wrote:
> > Perhaps it isn't more flexible.  On the other hand, it does allow anyone 
> > to read your code and know that there isn't any magical syntax that is 
> > usable on one Python x.y installation, that isn't on another.
> > 
> >   - Josiah
> 
> What are you talking about? There's tons of new "magical syntax" in
> Python. Examples for "magical syntax" features that don't work on
> 1.5.2 include:
> *List comprehensions

  Yep.

> *String methods

  Nope.  The syntax is identical.  Strings just happen to have more useful
attributes new.

> *Generators

  Yep.

> *Emulating numeric types

  Nope.  Never seen __coerce__? :)

> *Nested scopes

  Hmm.  Not really a syntactic difference... The syntax is the same, after
all, but the behavior is definitely different.

> * * and ** in function declarations

  Yep.

> *for line in this_file

  Nope.  Same as with strings, the iterator protocol, a set of methods with
a defined meaning, was added, and file objects were made to implement it. 
No syntactic changes.

> *Subclassing types
> 

  This is another iffy one.  The syntax is no different, the behavior has
just been changed.  "str", "int", etc, used to be builtin functions, not
type objects.  You also couldn't subclass types in Python, but if you could
have, the syntax would have been identical to what it is today.

> There's tons of stuff still being added to Python.

  Definitely.  But "stuff" isn't always the same as "magical syntax".
 
  Jp



From john at doe.com  Wed Jan 21 21:21:54 2004
From: john at doe.com (Brian Donovan)
Date: Thu, 22 Jan 2004 02:21:54 GMT
Subject: Identifing current function
Message-ID: <pan.2004.01.22.02.21.53.368742@doe.com>

Hi all,

  Is there a way to identify the current function. For example:

class A:
   def B(self):
      print current_function_name




From tcdelaney at optusnet.com.au  Sat Jan 10 19:49:56 2004
From: tcdelaney at optusnet.com.au (Tim Delaney)
Date: Sun, 11 Jan 2004 11:49:56 +1100
Subject: xrange() syntactic sugar
References: <338366A6D2E2CA4C9DAEAE652E12A1DE0106382C@au3010avexu1.global.avaya.com>
	<mailman.263.1073753102.12720.python-list@python.org>
Message-ID: <40009db3$0$27237$afc38c87@news.optusnet.com.au>

"Gerrit Holl" wrote:
>
> There is, by Thomas Wouters:
>
> PEP 204: Range Literals
> 14 Juli 2000, rejected.

Hah - that's what I get for relying on my faulty memory rather than actually
checking :)

Tim Delaney




From nhodgson at bigpond.net.au  Sat Jan 31 15:43:39 2004
From: nhodgson at bigpond.net.au (Neil Hodgson)
Date: Sat, 31 Jan 2004 20:43:39 GMT
Subject: Programmers Wanted for Computer Graphics Startup Near
	Philadelphia
References: <2da21d6c.0401310807.671be3b7@posting.google.com>
	<bvh1eq$jjr$1@namru.matavnet.hu>
Message-ID: <%rUSb.37510$Wa.14668@news-server.bigpond.net.au>

Mikl?s:

> Software patents are evil.
> Hell to them.

   Unfortunately, software patents are part of the business landscape now.
They often seem to be comfort blankets for investors ("we have something
unique that absolutely preserves our market position") rather than anything
real. To succeed in an interview, one must avoid laughing at the claims to
uniqueness and refrain from pointing out that the patent actually describes
a sub-optimal solution.

   Neil




From aldo123 at onet.pl  Tue Jan 13 10:51:04 2004
From: aldo123 at onet.pl (mic)
Date: Tue, 13 Jan 2004 16:51:04 +0100
Subject: catching msie NewWindow2 event
Message-ID: <bu146d$66p$1@news.atman.pl>

I'm trying to catch the MSIE NewWindow2 event using win32com interface. The
code I use is basically something like below:

from win32com.client import DispatchWithEvents

class Events:
    Browser = None
    def OnNewWindow2(self, ppDisp, Cancel):
        #catching the new window and trying to place it onto my own
        ppDisp = Events.Browser
        #Cancel = True - this doesn't work either (should prevent popup from
opening)

ie1 = DispatchWithEvents('InternetExplorer.Application', Events)
ie2 = DispatchWithEvents('InternetExplorer.Application', Events)
Events.Browser = ie2
ie1.Navigate('http://jaak.sav.net/test.html') #url to the html document that
opens its own window

I know that setting ppDisp value should work (at least I've seen it working
in C# code) but using it this way gives no results. What's more depending on
the url I use the event is triggered or not (other standard events work
okay). I've seen ctypes COM implementation demo that makes similiar things
but it looks so much more complicated than win32com api. Hope somebody has
some insight on that...

Regards,

Michal




From jacek.generowicz at cern.ch  Tue Jan  6 09:27:06 2004
From: jacek.generowicz at cern.ch (Jacek Generowicz)
Date: 06 Jan 2004 15:27:06 +0100
Subject: metadocumentation (keyword help)
Message-ID: <tyfn091gnk5.fsf@pcepsft001.cern.ch>

Where can I find concise, clear documentation[*] describing what one has
to do in order to enable Python's internal help to be able to provide
descriptions of Python keywords ?

I am in a situation where I have to give Python novices the ability to
fix this for themselves easily.


[*] Failing "concise" and "clear", how about "complete and correct" ?


From maarten at remove_this_ws.tn.tudelft.nl  Mon Jan 19 04:55:31 2004
From: maarten at remove_this_ws.tn.tudelft.nl (Maarten van Reeuwijk)
Date: Mon, 19 Jan 2004 10:55:31 +0100
Subject: Looking for very simple general purpose tokenizer
Message-ID: <bug9ij$30k$1@news.tudelft.nl>

Hi group,

I need to parse various text files in python. I was wondering if there was a
general purpose tokenizer available. I know about split(), but this
(otherwise very handy method does not allow me to specify a list of
splitting characters, only one at the time and it removes my splitting
operators (OK for spaces and \n's but not for =, / etc. Furthermore I tried 
tokenize but this specifically for Python and is way too heavy for me. I am
looking for something like this:


splitchars = [' ', '\n', '=', '/', ....]
tokenlist = tokenize(rawfile, splitchars)

Is there something like this available inside Python or did anyone already
make this? Thank you in advance

Maarten
-- 
===================================================================
Maarten van Reeuwijk                        Heat and Fluid Sciences
Phd student                             dept. of Multiscale Physics
www.ws.tn.tudelft.nl                 Delft University of Technology


From marks.pryorSHRUB at CHENEYverizon.net  Wed Jan 21 02:32:05 2004
From: marks.pryorSHRUB at CHENEYverizon.net (Mark S Pryor)
Date: Wed, 21 Jan 2004 07:32:05 GMT
Subject: python tool for ultraedit
Message-ID: <VVpPb.6157$h77.2157@nwrddc02.gnilink.net>

dear c.l.p,

I'm posting a Py script to change the wordfile
from inside the UE editor. Define this into
the adv. tool menu.

I found 100 posts in groups.google discussing
Python and UltraEdit.

Since UltraEdit is only happy with 10 parts in
a Wordfile, it is convenient to have multiple
wordfiles, with no more than 10 styles per wf.

To keep a wf associated to a script, add a tag
in the comment header:

   """
    wordfile: e:/path/mywordfile.txt
   """
http://mysite.verizon.net/res1ur2j/SwitchWF.zip

------ begin SwitchWF.py ------------
#!e:/Python22/python
"""
 script: SwitchWF.py
 keywords: enum window win32api handle callback
 author: tlviewerSHRUB at CHENEYyahoo.com
 relatedDoc=Selkey.png
 wordfile: "C:/Progra~1/UltraEdit/WORDFILE.TXT"  3

 UE macro to highlight the wf tag
 ------- start macro ------
  InsertMode
  ColumnModeOff
  HexOff
  UnixReOn
  GotoLine 1
  Find RegExp "\swordfile:"
  IfFound
  Find RegExp "\S"
  StartSelect
  Key END
  EndSelect
  EndIf
 ------ end macro ---------

 synopsis:  (2 arguments)
 python SwitchWF.py "path to new wf" Ind-of-Ext-SynHighlight

"""
import os, sys
import win32api as ap
import win32gui as wi
import win32ui as ui
import win32con as wc
import win32clipboard

myhwnd = 0
myti = ''
mycl = ''

# function callback
####################
def Callback(hwnd, skip):
 global myhwnd
 global myti
 ti = wi.GetWindowText(hwnd)
 if ti.find(skip) >=0:
  myhwnd = hwnd
  myti = ti
  print myhwnd, "uedit32 found",skip
  return 0
 else:
  #print myhwnd, ti
  return 1

# function pysendkey
#######################
"""
 pysendkey is a pure-python replacement for the
    WSHShell SendKeys method!
"""
def pysendkey( keycode ):
 dwFlags= wc.KEYEVENTF_EXTENDEDKEY
 bVk = keycode
 ap.keybd_event( bVk, bScan, dwFlags, 0)
 dwFlags= wc.KEYEVENTF_EXTENDEDKEY | wc.KEYEVENTF_KEYUP
 ap.keybd_event( bVk, bScan, dwFlags, 0)

# function menu_activate
########################
"""
 use below for activating sub menu items of the
  UE main menu.
 mid = main menu id
 iid = sub item id

"""
def menu_activate(myhwnd, mymenu, mid, iid ):
 pya = mymenu.GetSubMenu(mid)
 print pya.GetHandle()
 #vid = mymenu.GetMenuItemID(mid)
 #res = wi.SendMessageTimeout( myhwnd,wc.WM_COMMAND, vid, 0, 2, 75 )

 # configuration menu item id
 cid = pya.GetMenuItemID(iid)
 print "cid=", cid

 #check for OS, and pack the ID if necessary
 env = os.environ
 if env['WINDIR'].find('WINNT'):
  print "Got NT"
 else:
  print "Win98 pack the ID"
 res=wi.SetForegroundWindow(myhwnd)
 try:
  res = wi.SendMessageTimeout( myhwnd,wc.WM_COMMAND, cid, 0, 2, 75 )
  print "res=", res
 except:
  print "done - error "
  # ok
 ap.Sleep(50)


# Main
########################
try:
  wi.EnumWindows(Callback, "UltraEdit-32")
except:
 print "error", myhwnd


print myti, myhwnd

# get a Python handle object
# enumwindows was needed above since FindWindowEx is broken in Python 2.2-
#   must use the --exact-- title or fail (not the case in VB)
pyhw = ui.FindWindowEx( None, None, None, myti )

pymenu = pyhw.GetMenu()

# when called from the UE tool menu, we need a valid selection
if sys.argv[1] == '%sel%':
 sys.exit(0)

menu_activate(myhwnd, pymenu, 9, 0)

# get the hwnd of the UltraEdit Configuration dialog
#hwuc = cM.FindWindowLike( cl, "UltraEdit Configuration" )
hwuc = wi.FindWindowEx(0, 0, "#32770", "UltraEdit Configuration" )
print "ue config=", hwuc

# get handle to the child systabcontrol32 class
hwtab = wi.FindWindowEx( hwuc , 0, "SysTabControl32", None )
print hwtab

# open the 7 item via message
# TCM_FIRST= &h1300
#Const TCM_SETCURFOCUS As Long = (TCM_FIRST + 48)
# not found in Win32Con
TCM_SETCURFOCUS = 0x1330

SYNTAX_HIGHLIGHT = 7
wi.PostMessage( hwtab, TCM_SETCURFOCUS, SYNTAX_HIGHLIGHT , 0)

# get the myhwnd to the SynHigh dialog
hwsh = wi.FindWindowEx( hwuc, 0,  "#32770", "Syntax Highlighting")
print "SynHigh myhwnd=",hwsh

# get the myhwnd to its only edit box
hwedit = wi.FindWindowEx( hwsh, 0,  "Edit", None)

res = wi.SetForegroundWindow(hwedit)

# set the focus here
lres = wi.SendMessageTimeout(hwedit, wc.WM_SETFOCUS , None , None , 2 , 50 )

## press <SHIFT-END> down
#########
dwFlags= wc.KEYEVENTF_EXTENDEDKEY
bVk = wc.VK_SHIFT
bScan = 1  # or 0
ap.keybd_event( bVk, bScan, dwFlags, 0)

bVk = wc.VK_END
bScan = 1  # or 0
ap.keybd_event( bVk, bScan, dwFlags, 0)
########### end down keys#################

# up the two keys
################
dwFlags= wc.KEYEVENTF_EXTENDEDKEY | wc.KEYEVENTF_KEYUP
ap.keybd_event( bVk, bScan, dwFlags, 0)

bVk = wc.VK_SHIFT
ap.keybd_event( bVk, bScan, dwFlags, 0)
########### end up keys ##################

# press BACKSPACE up , then down
pysendkey( wc.VK_BACK )

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

#print sys.argv[1]

if len(sys.argv)>1:
 win32clipboard.OpenClipboard()
 win32clipboard.EmptyClipboard()
 win32clipboard.SetClipboardText(sys.argv[1])
 win32clipboard.CloseClipboard()

 # paste the clipboard, then push enter
 #
 lres = wi.SendMessageTimeout(hwedit, wc.WM_PASTE, 0 , 0 , 2 , 50 )

 pysendkey( wc.VK_RETURN )
 print "done"
 print sys.argv[1]
# if len(sys.argv)>2:
#  # get the View menu
#  menu_activate( myhwnd, pymenu, 5, int(sys.argv[2]))
#  ap.Sleep(50)
------ end script ------------

good luck,
Mark Pryor







From myfirstname at mylastname.com  Sun Jan  4 00:47:04 2004
From: myfirstname at mylastname.com (Dan Bullok)
Date: Sun, 04 Jan 2004 05:47:04 GMT
Subject: Parametrized inheritance
References: <2AJJb.725692$HS4.5422608@attbi_s01>
	<mailman.64.1073189833.12720.python-list@python.org>
Message-ID: <sNNJb.741891$Fm2.670283@attbi_s04>

Mike C. Fletcher wrote:

> You can find more information about these kinds of patterns by searching
> for "Mix-In Class" and/or "Multiple Inheritance".  Python 2.2 changed how
> multiple inheritance graphs are constructed in Python, BTW.  If you used
> old-style classes the mro would have been [MySub, Sub, Base, MyBase, Base]
> IIRC.

Well, I thought of doing this, but after looking up resolution order (sec
9.5.1 of the tutorial) I found that resolution is done "depth-first,
left-to-right",  In my example, that would have given [MySub, Sub, Base,
MyBase, Base], but, I checked, using mro(), and found that it was indeed
[MySub, Sub, MyBase, Base], just as I needed it.  (thanks for the mro() tip
- didn't know about that one).  Unless I've gone crosseyed (possible, it's
late), this is NOT depth-first, left-to-right.  So is the tutorial out of
date?




From jensthiede at webgear.co.za  Sun Jan 11 13:45:40 2004
From: jensthiede at webgear.co.za (Jens Thiede)
Date: 11 Jan 2004 10:45:40 -0800
Subject: Variable Scope 2 -- Thanks for 1.
References: <dcde6f.0401091247.c17b76e@posting.google.com>
Message-ID: <dcde6f.0401111045.7fc24246@posting.google.com>

OK, thanks for sorting that out, but what do I replace in the
following to avoid referancing:

x = [[0]*5]*5
x is [[0,0,0,0,0], [0,0,0,0,0], [0,0,0,0,0], [0,0,0,0,0], [0,0,0,0,0]]

and after

x[0][0] = 1;
x is [[1,0,0,0,0], [1,0,0,0,0], [1,0,0,0,0], [1,0,0,0,0], [1,0,0,0,0]]

is there a shorthand way to avoid referance or do I have to use a loop
or:

x = [[0]*5]+[[0]*5]+[[0]*5]+[[0]*5]+[[0]*5]

which is obviously stupid to try and do when the second cofficiant is
large or a variable.

Help would be much appreciated,

Jens Thiede


From elainejackson7355 at home.com  Fri Jan 30 00:49:29 2004
From: elainejackson7355 at home.com (Elaine Jackson)
Date: Fri, 30 Jan 2004 05:49:29 GMT
Subject: conditional expression sought
References: <pRbSb.330334$ts4.37644@pd7tw3no>
	<a8623416.0401291625.594a9768@posting.google.com>
Message-ID: <JfmSb.336724$ts4.227656@pd7tw3no>

This is just for theoretical interest. The A_i's and B_i's were meant as
metavariables.

"Corey Coughlin" <corey.coughlin at attbi.com> wrote in message
news:a8623416.0401291625.594a9768 at posting.google.com...
| "Elaine Jackson" <elainejackson7355 at home.com> wrote in message
news:<pRbSb.330334$ts4.37644 at pd7tw3no>...
| > If bool(B_i)==True for 1<=i<=n and j is the smallest i with bool(A_j)==True,
| > then the evaluation of (A_1 and B_1) or ... or (A_n and B_n) returns B_j
without
| > evaluating any other B_i. This is such a useful mode of expression that I
would
| > like to be able to use something similar even when there is an i with
| > bool(B_i)==False. The only thing I can think of by myself is ( (A_1 and
[B_1])
| > or ... or (A_n and [B_n]) )[0], and I can't be satisfied with that for
obvious
| > reasons. Does anybody know a good way to express this? Any help will be
mucho
| > appreciado.
| >
| > Peace
|
| Oh, this must be part of your truth table script.  Interesting,
| looking for something like a fast SOP evaluator, or more like a
| function evaluation mechanism?  It would probably be most useful to
| share your containers for A and B.  Are you really going to have
| variables named A_1 to A_n, or will you just have a vector A[0:n]?
| The vector would probably be easier to deal with.  Using integer
| representations for your boolean vectors is a good idea, and will
| probably buy you enough speed that you won't need a more serious form
| of short circuit evaluation, I imagine.  Unless your vectors are very
| large indeed.  Hmm...




From rmkrauter at yahoo.com  Wed Jan 21 12:01:42 2004
From: rmkrauter at yahoo.com (Rich Krauter)
Date: Wed, 21 Jan 2004 09:01:42 -0800 (PST)
Subject: Assignment to slice 
Message-ID: <20040121170142.55936.qmail@web40104.mail.yahoo.com>


I do not understand why python behaves the way it does
in the following code:

Here, Python doesn't like that I'm assigning
out-of-range.  OK. That's fine.
>>> x = []
>>> x[5] = 3
Traceback (most recent call last):
  File "<interactive input>", line 1, in ?
IndexError: list assignment index out of range

However, the following seems very strange. Assigning
to a slice, over non-existent array indexes, sets x[0]
and x[1]. 
>>> x[2:5] = [3,4]
>>> x
[3,4]
>>> x[1000:9000] = [5]
>>> x
[3, 4, 5]

Why does assigning to a slice of non-existent array
elements fill in the array, starting with the first
empty array position? (Acts like [].append() or
[].extend()?)  

Why not raise an out-of-bounds exception here too?
Wouldn't that be more consistent with the first case,
in which I tried to assign out-of-range, and got an
exception? 

IMO, at least the first index in the slice should be
required to exist in the array. If not, raise an
exception. That way, assigning to the slice fills in
the array in a predicatable way without having to do
len() checks first to ensure that you know where in
the array the slice is actually going to be inserted.

But I'm sure it is the way it is for a good reason.
Hopefully someone can clue me in.

Thank you in advance. 

Rich




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From __peter__ at web.de  Thu Jan 29 11:28:41 2004
From: __peter__ at web.de (Peter Otten)
Date: Thu, 29 Jan 2004 17:28:41 +0100
Subject: Get number of iteration
References: <bvbbd7$9rv$01$1@news.t-online.com>
Message-ID: <bvbc74$m2r$04$1@news.t-online.com>

Florian Lindner wrote:

> If I iterate through a list, is there a way I can get the number of the
> iteration: first, second, third, ...
> 
> l = ["three", "four", "five", "six"]
> for x in l
>   print x
>   print x.iteration()  # <- That's what I'm looking for!
>   print "next"

>>> sample = "tree for five".split()
>>> for index, item in enumerate(sample):
...     print index, item
...
0 tree
1 for
2 five

You are looking for enumerate(). Counting starts at 0, though.

Peter


From nid_oizo at yahoo.com_remove_the_  Tue Jan 27 17:43:45 2004
From: nid_oizo at yahoo.com_remove_the_ (Nicolas Fleury)
Date: Tue, 27 Jan 2004 17:43:45 -0500
Subject: Portable /dev/null?
Message-ID: <zQBRb.6394$Ja2.59118@nnrp1.uunet.ca>

Hi everyone,
	Is there an object in some standard library that would be the portable 
equivalent of "file('/dev/null','w')" or do I have to create my own 
class and object to do it?  If it doesn't exist, do you think it would 
be a good idea to have such an object in a standard library?

Thx and Regards,

Nicolas



From mark at mceahern.com  Fri Jan 23 04:54:01 2004
From: mark at mceahern.com (Mark McEahern)
Date: Fri, 23 Jan 2004 03:54:01 -0600
Subject: Batch commands on Windows
In-Reply-To: <7A3Qb.4870$AK2.3953@newssvr29.news.prodigy.com>
References: <7A3Qb.4870$AK2.3953@newssvr29.news.prodigy.com>
Message-ID: <1074851641.5354.166.camel@dev.internal>

On Fri, 2004-01-23 at 00:56, Moosebumps wrote:
> So, after reading some messages about os.system, and looking at the popen
> stuff and trying it a bit, I still have not found a way to keep a command
> window open for several commands (on Windows 2000/XP), while seeing the
> normal output in a command window.  All I want to do is do what a batch file
> does, but I want to actually have functions and associative arrays and all
> the other niceties of python.

1.  Open file whatever.py, put this in it:

  print "Hello world"

2.  Open cmd.exe, navigate to where whatever.py is and type:

  whatever.py

What happens?

// m

p.s.  It's likely I've misunderstood your question because on the face
of it, as I understand your question, what you're saying is a glaring
hole in Python are aspects of Python I use effortlessly every day.




From guettli at thomas-guettler.de  Tue Jan 13 08:18:09 2004
From: guettli at thomas-guettler.de (Thomas Guettler)
Date: Tue, 13 Jan 2004 14:18:09 +0100
Subject: what is best for web development??
References: <mailman.292.1073907903.12720.python-list@python.org>
Message-ID: <pan.2004.01.13.13.18.08.666659@thomas-guettler.de>

Am Mon, 12 Jan 2004 11:44:56 +0000 schrieb ketulp_baroda:

> i am developing an issue tracking system 
> the primary requirements are
> 1)it should be platform independent which i think python will take 
> care of
> 2)it should have customizeable gui .I am thinking of using templates 
> for this like Cheetah. Is there any other better solution to Cheetah?
> The problem i am facing here is i dont know what to use for 
> development of the application. I came across many ways to develop 
> web application in python which I already specified like 
> i)the cgi module in python
> ii)Python Server Pages
> iii)Quixote
> iv)WebWare
> v)Zope etc.

> I want to choose such an environment so that i dont have to install 
> other softwares to run my application.For eg. I think if I develop 
> using zope then the client also has to install zope to run my 
> software and i dont want this.

That's not true. Zope send HTML over HTTP to
your client. You can use it with any webbrowser.

I like Quixote, but don't use the forms library
or the template language. I prefere python:

def foo(self, request):
    ret=[]
    ret.append(self.header())
    ret.append( 
      """
        HTML
      """)
    ret.append(self.footer())
    return ''.join(ret)

thomas



From giles_brown at hotmail.com  Wed Jan 28 08:44:02 2004
From: giles_brown at hotmail.com (Giles Brown)
Date: 28 Jan 2004 05:44:02 -0800
Subject: Help with Extension Class Crash
Message-ID: <57de9986.0401280544.37d56ebb@posting.google.com>

Hello folks,
I'm tryin to write an extension class in C (been a while since
I wrote some C :-).  I want the class to be inheritable from Python.
I've put the magic incantations into the type descriptor.  But it
crashes.  I've tracked the crash down to a call to PyObject_GenericGetAttr.

When I sub-class my class the tp_dictoffset comes out as -4 which 

quoting from PyObject_GenericGetAttr:
"""
		if (dictoffset < 0) {
			int tsize;
			size_t size;

			tsize = ((PyVarObject *)obj)->ob_size;
			if (tsize < 0)
				tsize = -tsize;
			size = _PyObject_VAR_SIZE(tp, tsize);

			dictoffset += (long)size;
			assert(dictoffset > 0);
			assert(dictoffset % SIZEOF_VOID_P == 0);
		}
		dictptr = (PyObject **) ((char *)obj + dictoffset);
		dict = *dictptr; <---- crash happens here
"""

The class I'm trying to create is a variable size class.  Everything 
is ok unless I sub-class it.  I'm guess that maybe I haven't set the
sizes up ok so its sending the dictptr off into the blue. Or I've 
missed setting of something, but not sure where to look.

Can anyone help?

Thanks,
Giles


From jepler at unpythonic.net  Wed Jan 28 12:34:46 2004
From: jepler at unpythonic.net (Jeff Epler)
Date: Wed, 28 Jan 2004 11:34:46 -0600
Subject: posixpath.abspath and symlinks
In-Reply-To: <bv8qhc$ph1mk$1@ID-223265.news.uni-berlin.de>
References: <mailman.929.1075306173.12720.python-list@python.org>
	<bv8qhc$ph1mk$1@ID-223265.news.uni-berlin.de>
Message-ID: <20040128173446.GS18498@unpythonic.net>

On Wed, Jan 28, 2004 at 10:37:39PM +0530, Sidharth Kuruvila wrote:
> i dont know unix.
> how does abs path work with sym-links.


os.abspath does not check whether any components are symlinks.  In the
presence of symlinks,
    /a/../b
and
    /b
can refer to separate files if /a is a symlink to a directory.  As far as
I know, posixpath.abspath normalizes the first into the second anyway.

Similarly, if you have a symlink
    /a -> c
then posixpath.abspath("a") doesn't return /c, it still returns /a

You can use os.readlink() on posix systems to get the thing a symlink
points to:
>>> os.readlink("/proc/self")
'14717'
>>> os.readlink("/")
OSError: [Errno 22] Invalid argument: '/'

Jeff



From http  Thu Jan  8 22:25:32 2004
From: http (Paul Rubin)
Date: 08 Jan 2004 19:25:32 -0800
Subject: convert a list to a string
References: <3FFE1E29.20801@hotmail.com>
Message-ID: <7xwu81dcr7.fsf@ruckus.brouhaha.com>

Bart Nessux <bart_nessux at hotmail.com> writes:
> number = random.sample(range(count), 1)
> 
> This makes 'number' into a one entry list (I don't know why as 'count'
> is an integer). Is there an easy way to convert 'number' back to an
> int?

number = number[0]

But why are you using random.sample for that?  And making a list of
size count, just to throw it away?  It sounds like you just want a
random number between zero and count.  Do that with:

   number = random.randint(count)


From deets_noospaam at web.de  Wed Jan 28 10:00:06 2004
From: deets_noospaam at web.de (Diez B. Roggisch)
Date: Wed, 28 Jan 2004 16:00:06 +0100
Subject: Chart drawing library for Python
References: <6ee58e07.0401280403.3d52a9e0@posting.google.com>
Message-ID: <bv8ipn$2dp$07$1@news.t-online.com>

Hi,

> is there something like "JpGraph" for python ?
> For those who don't know this PHP library: It is a high level
> drawing library that generates gif files with all kind of charts.
> 
> Or (maybe better) is there a C library doing this. I think i
> read about something like this a while ago.

there has been a thread about this lately: Many people (including me) use
graphviz for that. As long as you don't need interactivity, it does a
really great job.

Diez


From aahz at pythoncraft.com  Mon Jan 19 16:51:59 2004
From: aahz at pythoncraft.com (Aahz)
Date: 19 Jan 2004 16:51:59 -0500
Subject: stack-like file object
References: <400be8f3_2@nova.entelchile.net>
Message-ID: <buhjhv$cc5$1@panix1.panix.com>

In article <400be8f3_2 at nova.entelchile.net>,
Rodrigo Benenson <rodrigob at elo.utfsm.cl> wrote:
>
>I need to implement a stack on a file.

Why not use a real database?
-- 
Aahz (aahz at pythoncraft.com)           <*>         http://www.pythoncraft.com/

A: No.
Q: Is top-posting okay?


From opengeometry at yahoo.ca  Sun Jan 25 03:24:06 2004
From: opengeometry at yahoo.ca (William Park)
Date: 25 Jan 2004 08:24:06 GMT
Subject: Python features in Bash (request for feedback)
Message-ID: <buvuf5$mfmtj$1@ID-99293.news.uni-berlin.de>

I wrote a patch to Bash shell, incorporating some of Awk/Python features
that I use a lot:
    http://home.eol.ca/~parkw/bash.diff
    http://home.eol.ca/~parkw/index.html

I would like to get feedback as to what Python features you would like
to see in Bash.  

-- 
William Park, Open Geometry Consulting, <opengeometry at yahoo.ca>
Linux solution for data management and processing. 


From engsolnom at ipns.com  Thu Jan  8 21:28:34 2004
From: engsolnom at ipns.com (engsolnom at ipns.com)
Date: Thu, 08 Jan 2004 18:28:34 -0800
Subject: Pesky reverse()
Message-ID: <3t3svvs7ni8l8jnn1l1v60oogirqoaa85f@4ax.com>


I need to use the built-in method 'reverse', but notice strange behavior.
Foe example:

print my_list.reverse()  doesn't work.

new_list = my_list.reverse() doesn't work.

my_list.reverse()
print my_list does work. (displays reversed list)

But  I want both a 'forward' and 'reverse' list:

new_list = my+list  # should save a 'forward' copy, right? Nope
my_list.reverse() actually reverses both copies, since Python is a bit too
helpful sometimes, and I understand why.

So the question is, how do I get a forward and reverse list?

Thanks......Norm. 




From jonas at jonasgalvez.com  Thu Jan  8 19:07:02 2004
From: jonas at jonasgalvez.com (Jonas Galvez)
Date: Thu, 8 Jan 2004 22:07:02 -0200
Subject: NNTP Server for this group
References: <eee18d22.0401072316.37ccff69@posting.google.com>
	<btjqnu$k1j$2@netnews.upenn.edu>
Message-ID: <btkqnv$pvf$1@sea.gmane.org>

> [John P. Speno]
> gmane.comp.python.general on http://www.gmane.org/?

Sweet! Thanks...



=-
Jonas Galvez
jonasgalvez.com/blog
macromedia.com/go/team